* [PATCH v2 08/10] staging: media: Make use of media_bus_format enum
From: Boris Brezillon @ 2014-11-06 9:57 UTC (permalink / raw)
To: Mauro Carvalho Chehab, Hans Verkuil, Laurent Pinchart,
linux-media
Cc: linux-arm-kernel, linux-api, devel, linux-kernel, linux-doc,
Guennadi Liakhovetski, Boris Brezillon
In-Reply-To: <1415267829-4177-1-git-send-email-boris.brezillon@free-electrons.com>
In order to have subsytem agnostic media bus format definitions we've
moved media bus definition to include/uapi/linux/media-bus-format.h and
prefixed enum values with MEDIA_BUS_FMT instead of V4L2_MBUS_FMT.
Reference new definitions in all media drivers residing in staging.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
drivers/staging/media/davinci_vpfe/dm365_ipipe.c | 18 ++--
.../staging/media/davinci_vpfe/dm365_ipipe_hw.c | 26 +++---
drivers/staging/media/davinci_vpfe/dm365_ipipeif.c | 100 ++++++++++-----------
drivers/staging/media/davinci_vpfe/dm365_isif.c | 90 +++++++++----------
drivers/staging/media/davinci_vpfe/dm365_resizer.c | 96 ++++++++++----------
.../staging/media/davinci_vpfe/vpfe_mc_capture.c | 18 ++--
drivers/staging/media/omap4iss/iss_csi2.c | 62 ++++++-------
drivers/staging/media/omap4iss/iss_ipipe.c | 16 ++--
drivers/staging/media/omap4iss/iss_ipipeif.c | 28 +++---
drivers/staging/media/omap4iss/iss_resizer.c | 26 +++---
drivers/staging/media/omap4iss/iss_video.c | 78 ++++++++--------
drivers/staging/media/omap4iss/iss_video.h | 10 +--
12 files changed, 284 insertions(+), 284 deletions(-)
diff --git a/drivers/staging/media/davinci_vpfe/dm365_ipipe.c b/drivers/staging/media/davinci_vpfe/dm365_ipipe.c
index bdc7f00..704fa20 100644
--- a/drivers/staging/media/davinci_vpfe/dm365_ipipe.c
+++ b/drivers/staging/media/davinci_vpfe/dm365_ipipe.c
@@ -37,15 +37,15 @@
/* ipipe input format's */
static const unsigned int ipipe_input_fmts[] = {
- V4L2_MBUS_FMT_UYVY8_2X8,
- V4L2_MBUS_FMT_SGRBG12_1X12,
- V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
- V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8,
+ MEDIA_BUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_SGRBG12_1X12,
+ MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
+ MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
};
/* ipipe output format's */
static const unsigned int ipipe_output_fmts[] = {
- V4L2_MBUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_UYVY8_2X8,
};
static int ipipe_validate_lutdpc_params(struct vpfe_ipipe_lutdpc *lutdpc)
@@ -1457,7 +1457,7 @@ ipipe_try_format(struct vpfe_ipipe_device *ipipe,
/* If not found, use SBGGR10 as default */
if (i >= ARRAY_SIZE(ipipe_input_fmts))
- fmt->code = V4L2_MBUS_FMT_SGRBG12_1X12;
+ fmt->code = MEDIA_BUS_FMT_SGRBG12_1X12;
} else if (pad == IPIPE_PAD_SOURCE) {
for (i = 0; i < ARRAY_SIZE(ipipe_output_fmts); i++)
if (fmt->code == ipipe_output_fmts[i])
@@ -1465,7 +1465,7 @@ ipipe_try_format(struct vpfe_ipipe_device *ipipe,
/* If not found, use UYVY as default */
if (i >= ARRAY_SIZE(ipipe_output_fmts))
- fmt->code = V4L2_MBUS_FMT_UYVY8_2X8;
+ fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
}
fmt->width = clamp_t(u32, fmt->width, MIN_OUT_HEIGHT, max_out_width);
@@ -1642,7 +1642,7 @@ ipipe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
memset(&format, 0, sizeof(format));
format.pad = IPIPE_PAD_SINK;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
- format.format.code = V4L2_MBUS_FMT_SGRBG12_1X12;
+ format.format.code = MEDIA_BUS_FMT_SGRBG12_1X12;
format.format.width = IPIPE_MAX_OUTPUT_WIDTH_A;
format.format.height = IPIPE_MAX_OUTPUT_HEIGHT_A;
ipipe_set_format(sd, fh, &format);
@@ -1650,7 +1650,7 @@ ipipe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
memset(&format, 0, sizeof(format));
format.pad = IPIPE_PAD_SOURCE;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
- format.format.code = V4L2_MBUS_FMT_UYVY8_2X8;
+ format.format.code = MEDIA_BUS_FMT_UYVY8_2X8;
format.format.width = IPIPE_MAX_OUTPUT_WIDTH_A;
format.format.height = IPIPE_MAX_OUTPUT_HEIGHT_A;
ipipe_set_format(sd, fh, &format);
diff --git a/drivers/staging/media/davinci_vpfe/dm365_ipipe_hw.c b/drivers/staging/media/davinci_vpfe/dm365_ipipe_hw.c
index b2daf5e..4a0895b2 100644
--- a/drivers/staging/media/davinci_vpfe/dm365_ipipe_hw.c
+++ b/drivers/staging/media/davinci_vpfe/dm365_ipipe_hw.c
@@ -196,12 +196,12 @@ ipipe_setup_resizer(void *__iomem rsz_base, struct resizer_params *params)
rsz_set_rsz_regs(rsz_base, RSZ_B, params);
}
-static u32 ipipe_get_color_pat(enum v4l2_mbus_pixelcode pix)
+static u32 ipipe_get_color_pat(enum media_bus_format pix)
{
switch (pix) {
- case V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8:
- case V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SGRBG12_1X12:
+ case MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SGRBG12_1X12:
return ipipe_sgrbg_pattern;
default:
@@ -211,23 +211,23 @@ static u32 ipipe_get_color_pat(enum v4l2_mbus_pixelcode pix)
static int ipipe_get_data_path(struct vpfe_ipipe_device *ipipe)
{
- enum v4l2_mbus_pixelcode temp_pix_fmt;
+ enum media_bus_format temp_pix_fmt;
switch (ipipe->formats[IPIPE_PAD_SINK].code) {
- case V4L2_MBUS_FMT_SBGGR8_1X8:
- case V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8:
- case V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SGRBG12_1X12:
- temp_pix_fmt = V4L2_MBUS_FMT_SGRBG12_1X12;
+ case MEDIA_BUS_FMT_SBGGR8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SGRBG12_1X12:
+ temp_pix_fmt = MEDIA_BUS_FMT_SGRBG12_1X12;
break;
default:
- temp_pix_fmt = V4L2_MBUS_FMT_UYVY8_2X8;
+ temp_pix_fmt = MEDIA_BUS_FMT_UYVY8_2X8;
}
- if (temp_pix_fmt == V4L2_MBUS_FMT_SGRBG12_1X12) {
+ if (temp_pix_fmt == MEDIA_BUS_FMT_SGRBG12_1X12) {
if (ipipe->formats[IPIPE_PAD_SOURCE].code ==
- V4L2_MBUS_FMT_SGRBG12_1X12)
+ MEDIA_BUS_FMT_SGRBG12_1X12)
return IPIPE_RAW2RAW;
return IPIPE_RAW2YUV;
}
diff --git a/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c b/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c
index 6d4893b..3818e94 100644
--- a/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c
+++ b/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c
@@ -23,42 +23,42 @@
#include "vpfe_mc_capture.h"
static const unsigned int ipipeif_input_fmts[] = {
- V4L2_MBUS_FMT_UYVY8_2X8,
- V4L2_MBUS_FMT_SGRBG12_1X12,
- V4L2_MBUS_FMT_Y8_1X8,
- V4L2_MBUS_FMT_UV8_1X8,
- V4L2_MBUS_FMT_YDYUYDYV8_1X16,
- V4L2_MBUS_FMT_SBGGR8_1X8,
+ MEDIA_BUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_SGRBG12_1X12,
+ MEDIA_BUS_FMT_Y8_1X8,
+ MEDIA_BUS_FMT_UV8_1X8,
+ MEDIA_BUS_FMT_YDYUYDYV8_1X16,
+ MEDIA_BUS_FMT_SBGGR8_1X8,
};
static const unsigned int ipipeif_output_fmts[] = {
- V4L2_MBUS_FMT_UYVY8_2X8,
- V4L2_MBUS_FMT_SGRBG12_1X12,
- V4L2_MBUS_FMT_Y8_1X8,
- V4L2_MBUS_FMT_UV8_1X8,
- V4L2_MBUS_FMT_YDYUYDYV8_1X16,
- V4L2_MBUS_FMT_SBGGR8_1X8,
- V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
- V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8,
+ MEDIA_BUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_SGRBG12_1X12,
+ MEDIA_BUS_FMT_Y8_1X8,
+ MEDIA_BUS_FMT_UV8_1X8,
+ MEDIA_BUS_FMT_YDYUYDYV8_1X16,
+ MEDIA_BUS_FMT_SBGGR8_1X8,
+ MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
+ MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
};
static int
-ipipeif_get_pack_mode(enum v4l2_mbus_pixelcode in_pix_fmt)
+ipipeif_get_pack_mode(enum media_bus_format in_pix_fmt)
{
switch (in_pix_fmt) {
- case V4L2_MBUS_FMT_SBGGR8_1X8:
- case V4L2_MBUS_FMT_Y8_1X8:
- case V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8:
- case V4L2_MBUS_FMT_UV8_1X8:
+ case MEDIA_BUS_FMT_SBGGR8_1X8:
+ case MEDIA_BUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_UV8_1X8:
return IPIPEIF_5_1_PACK_8_BIT;
- case V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8:
return IPIPEIF_5_1_PACK_8_BIT_A_LAW;
- case V4L2_MBUS_FMT_SGRBG12_1X12:
+ case MEDIA_BUS_FMT_SGRBG12_1X12:
return IPIPEIF_5_1_PACK_16_BIT;
- case V4L2_MBUS_FMT_SBGGR12_1X12:
+ case MEDIA_BUS_FMT_SBGGR12_1X12:
return IPIPEIF_5_1_PACK_12_BIT;
default:
@@ -107,8 +107,8 @@ ipipeif_get_cfg_src1(struct vpfe_ipipeif_device *ipipeif)
informat = &ipipeif->formats[IPIPEIF_PAD_SINK];
if (ipipeif->input == IPIPEIF_INPUT_MEMORY &&
- (informat->code == V4L2_MBUS_FMT_Y8_1X8 ||
- informat->code == V4L2_MBUS_FMT_UV8_1X8))
+ (informat->code == MEDIA_BUS_FMT_Y8_1X8 ||
+ informat->code == MEDIA_BUS_FMT_UV8_1X8))
return IPIPEIF_CCDC;
return IPIPEIF_SRC1_PARALLEL_PORT;
@@ -122,11 +122,11 @@ ipipeif_get_data_shift(struct vpfe_ipipeif_device *ipipeif)
informat = &ipipeif->formats[IPIPEIF_PAD_SINK];
switch (informat->code) {
- case V4L2_MBUS_FMT_SGRBG12_1X12:
+ case MEDIA_BUS_FMT_SGRBG12_1X12:
return IPIPEIF_5_1_BITS11_0;
- case V4L2_MBUS_FMT_Y8_1X8:
- case V4L2_MBUS_FMT_UV8_1X8:
+ case MEDIA_BUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_UV8_1X8:
return IPIPEIF_5_1_BITS11_0;
default:
@@ -143,7 +143,7 @@ ipipeif_get_source(struct vpfe_ipipeif_device *ipipeif)
if (ipipeif->input == IPIPEIF_INPUT_ISIF)
return IPIPEIF_CCDC;
- if (informat->code == V4L2_MBUS_FMT_UYVY8_2X8)
+ if (informat->code == MEDIA_BUS_FMT_UYVY8_2X8)
return IPIPEIF_SDRAM_YUV;
return IPIPEIF_SDRAM_RAW;
@@ -190,7 +190,7 @@ static int ipipeif_hw_setup(struct v4l2_subdev *sd)
struct v4l2_mbus_framefmt *informat, *outformat;
struct ipipeif_params params = ipipeif->config;
enum ipipeif_input_source ipipeif_source;
- enum v4l2_mbus_pixelcode isif_port_if;
+ enum media_bus_format isif_port_if;
void *ipipeif_base_addr;
unsigned int val;
int data_shift;
@@ -268,16 +268,16 @@ static int ipipeif_hw_setup(struct v4l2_subdev *sd)
ipipeif_write(val, ipipeif_base_addr, IPIPEIF_INIRSZ);
isif_port_if = informat->code;
- if (isif_port_if == V4L2_MBUS_FMT_Y8_1X8)
- isif_port_if = V4L2_MBUS_FMT_YUYV8_1X16;
- else if (isif_port_if == V4L2_MBUS_FMT_UV8_1X8)
- isif_port_if = V4L2_MBUS_FMT_SGRBG12_1X12;
+ if (isif_port_if == MEDIA_BUS_FMT_Y8_1X8)
+ isif_port_if = MEDIA_BUS_FMT_YUYV8_1X16;
+ else if (isif_port_if == MEDIA_BUS_FMT_UV8_1X8)
+ isif_port_if = MEDIA_BUS_FMT_SGRBG12_1X12;
/* Enable DPCM decompression */
switch (ipipeif_source) {
case IPIPEIF_SDRAM_RAW:
val = 0;
- if (outformat->code == V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8) {
+ if (outformat->code == MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8) {
val = 1;
val |= (IPIPEIF_DPCM_8BIT_10BIT & 1) <<
IPIPEIF_DPCM_BITS_SHIFT;
@@ -296,9 +296,9 @@ static int ipipeif_hw_setup(struct v4l2_subdev *sd)
/* configure CFG2 */
val = ipipeif_read(ipipeif_base_addr, IPIPEIF_CFG2);
switch (isif_port_if) {
- case V4L2_MBUS_FMT_YUYV8_1X16:
- case V4L2_MBUS_FMT_UYVY8_2X8:
- case V4L2_MBUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_YUYV8_1X16:
+ case MEDIA_BUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_Y8_1X8:
RESETBIT(val, IPIPEIF_CFG2_YUV8_SHIFT);
SETBIT(val, IPIPEIF_CFG2_YUV16_SHIFT);
ipipeif_write(val, ipipeif_base_addr, IPIPEIF_CFG2);
@@ -344,16 +344,16 @@ static int ipipeif_hw_setup(struct v4l2_subdev *sd)
val |= VPFE_PINPOL_POSITIVE << IPIPEIF_CFG2_VDPOL_SHIFT;
switch (isif_port_if) {
- case V4L2_MBUS_FMT_YUYV8_1X16:
- case V4L2_MBUS_FMT_YUYV10_1X20:
+ case MEDIA_BUS_FMT_YUYV8_1X16:
+ case MEDIA_BUS_FMT_YUYV10_1X20:
RESETBIT(val, IPIPEIF_CFG2_YUV8_SHIFT);
SETBIT(val, IPIPEIF_CFG2_YUV16_SHIFT);
break;
- case V4L2_MBUS_FMT_YUYV8_2X8:
- case V4L2_MBUS_FMT_UYVY8_2X8:
- case V4L2_MBUS_FMT_Y8_1X8:
- case V4L2_MBUS_FMT_YUYV10_2X10:
+ case MEDIA_BUS_FMT_YUYV8_2X8:
+ case MEDIA_BUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_YUYV10_2X10:
SETBIT(val, IPIPEIF_CFG2_YUV8_SHIFT);
SETBIT(val, IPIPEIF_CFG2_YUV16_SHIFT);
val |= IPIPEIF_CBCR_Y << IPIPEIF_CFG2_YUV8P_SHIFT;
@@ -625,7 +625,7 @@ ipipeif_try_format(struct vpfe_ipipeif_device *ipipeif,
/* If not found, use SBGGR10 as default */
if (i >= ARRAY_SIZE(ipipeif_input_fmts))
- fmt->code = V4L2_MBUS_FMT_SGRBG12_1X12;
+ fmt->code = MEDIA_BUS_FMT_SGRBG12_1X12;
} else if (pad == IPIPEIF_PAD_SOURCE) {
for (i = 0; i < ARRAY_SIZE(ipipeif_output_fmts); i++)
if (fmt->code == ipipeif_output_fmts[i])
@@ -633,7 +633,7 @@ ipipeif_try_format(struct vpfe_ipipeif_device *ipipeif,
/* If not found, use UYVY as default */
if (i >= ARRAY_SIZE(ipipeif_output_fmts))
- fmt->code = V4L2_MBUS_FMT_UYVY8_2X8;
+ fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
}
fmt->width = clamp_t(u32, fmt->width, MIN_OUT_HEIGHT, max_out_width);
@@ -770,7 +770,7 @@ ipipeif_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
memset(&format, 0, sizeof(format));
format.pad = IPIPEIF_PAD_SINK;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
- format.format.code = V4L2_MBUS_FMT_SGRBG12_1X12;
+ format.format.code = MEDIA_BUS_FMT_SGRBG12_1X12;
format.format.width = IPIPE_MAX_OUTPUT_WIDTH_A;
format.format.height = IPIPE_MAX_OUTPUT_HEIGHT_A;
ipipeif_set_format(sd, fh, &format);
@@ -778,7 +778,7 @@ ipipeif_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
memset(&format, 0, sizeof(format));
format.pad = IPIPEIF_PAD_SOURCE;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
- format.format.code = V4L2_MBUS_FMT_UYVY8_2X8;
+ format.format.code = MEDIA_BUS_FMT_UYVY8_2X8;
format.format.width = IPIPE_MAX_OUTPUT_WIDTH_A;
format.format.height = IPIPE_MAX_OUTPUT_HEIGHT_A;
ipipeif_set_format(sd, fh, &format);
@@ -805,9 +805,9 @@ ipipeif_video_in_queue(struct vpfe_device *vpfe_dev, unsigned long addr)
return -EINVAL;
switch (ipipeif->formats[IPIPEIF_PAD_SINK].code) {
- case V4L2_MBUS_FMT_Y8_1X8:
- case V4L2_MBUS_FMT_UV8_1X8:
- case V4L2_MBUS_FMT_YDYUYDYV8_1X16:
+ case MEDIA_BUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_UV8_1X8:
+ case MEDIA_BUS_FMT_YDYUYDYV8_1X16:
adofs = ipipeif->formats[IPIPEIF_PAD_SINK].width;
break;
diff --git a/drivers/staging/media/davinci_vpfe/dm365_isif.c b/drivers/staging/media/davinci_vpfe/dm365_isif.c
index 0d535b0..fa26f63 100644
--- a/drivers/staging/media/davinci_vpfe/dm365_isif.c
+++ b/drivers/staging/media/davinci_vpfe/dm365_isif.c
@@ -27,13 +27,13 @@
#define MAX_HEIGHT 4096
static const unsigned int isif_fmts[] = {
- V4L2_MBUS_FMT_YUYV8_2X8,
- V4L2_MBUS_FMT_UYVY8_2X8,
- V4L2_MBUS_FMT_YUYV8_1X16,
- V4L2_MBUS_FMT_YUYV10_1X20,
- V4L2_MBUS_FMT_SGRBG12_1X12,
- V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8,
- V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
+ MEDIA_BUS_FMT_YUYV8_2X8,
+ MEDIA_BUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_YUYV8_1X16,
+ MEDIA_BUS_FMT_YUYV10_1X20,
+ MEDIA_BUS_FMT_SGRBG12_1X12,
+ MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
+ MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
};
#define ISIF_COLPTN_R_Ye 0x0
@@ -154,7 +154,7 @@ enum v4l2_field vpfe_isif_get_fid(struct vpfe_device *vpfe_dev)
static int
isif_set_pixel_format(struct vpfe_isif_device *isif, unsigned int pixfmt)
{
- if (isif->formats[ISIF_PAD_SINK].code == V4L2_MBUS_FMT_SGRBG12_1X12) {
+ if (isif->formats[ISIF_PAD_SINK].code == MEDIA_BUS_FMT_SGRBG12_1X12) {
if (pixfmt == V4L2_PIX_FMT_SBGGR16)
isif->isif_cfg.data_pack = ISIF_PACK_16BIT;
else if ((pixfmt == V4L2_PIX_FMT_SGRBG10DPCM8) ||
@@ -184,7 +184,7 @@ static int
isif_set_frame_format(struct vpfe_isif_device *isif,
enum isif_frmfmt frm_fmt)
{
- if (isif->formats[ISIF_PAD_SINK].code == V4L2_MBUS_FMT_SGRBG12_1X12)
+ if (isif->formats[ISIF_PAD_SINK].code == MEDIA_BUS_FMT_SGRBG12_1X12)
isif->isif_cfg.bayer.frm_fmt = frm_fmt;
else
isif->isif_cfg.ycbcr.frm_fmt = frm_fmt;
@@ -196,7 +196,7 @@ static int isif_set_image_window(struct vpfe_isif_device *isif)
{
struct v4l2_rect *win = &isif->crop;
- if (isif->formats[ISIF_PAD_SINK].code == V4L2_MBUS_FMT_SGRBG12_1X12) {
+ if (isif->formats[ISIF_PAD_SINK].code == MEDIA_BUS_FMT_SGRBG12_1X12) {
isif->isif_cfg.bayer.win.top = win->top;
isif->isif_cfg.bayer.win.left = win->left;
isif->isif_cfg.bayer.win.width = win->width;
@@ -214,7 +214,7 @@ static int isif_set_image_window(struct vpfe_isif_device *isif)
static int
isif_set_buftype(struct vpfe_isif_device *isif, enum isif_buftype buf_type)
{
- if (isif->formats[ISIF_PAD_SINK].code == V4L2_MBUS_FMT_SGRBG12_1X12)
+ if (isif->formats[ISIF_PAD_SINK].code == MEDIA_BUS_FMT_SGRBG12_1X12)
isif->isif_cfg.bayer.buf_type = buf_type;
else
isif->isif_cfg.ycbcr.buf_type = buf_type;
@@ -296,7 +296,7 @@ isif_try_format(struct vpfe_isif_device *isif, struct v4l2_subdev_fh *fh,
/* If not found, use YUYV8_2x8 as default */
if (i >= ARRAY_SIZE(isif_fmts))
- fmt->format.code = V4L2_MBUS_FMT_YUYV8_2X8;
+ fmt->format.code = MEDIA_BUS_FMT_YUYV8_2X8;
/* Clamp the size. */
fmt->format.width = clamp_t(u32, width, 32, MAX_WIDTH);
@@ -429,7 +429,7 @@ static int isif_get_params(struct v4l2_subdev *sd, void *params)
struct vpfe_isif_device *isif = v4l2_get_subdevdata(sd);
/* only raw module parameters can be set through the IOCTL */
- if (isif->formats[ISIF_PAD_SINK].code != V4L2_MBUS_FMT_SGRBG12_1X12)
+ if (isif->formats[ISIF_PAD_SINK].code != MEDIA_BUS_FMT_SGRBG12_1X12)
return -EINVAL;
memcpy(params, &isif->isif_cfg.bayer.config_params,
sizeof(isif->isif_cfg.bayer.config_params));
@@ -604,7 +604,7 @@ static int isif_set_params(struct v4l2_subdev *sd, void *params)
int ret = -EINVAL;
/* only raw module parameters can be set through the IOCTL */
- if (isif->formats[ISIF_PAD_SINK].code != V4L2_MBUS_FMT_SGRBG12_1X12)
+ if (isif->formats[ISIF_PAD_SINK].code != MEDIA_BUS_FMT_SGRBG12_1X12)
return ret;
memcpy(&isif_raw_params, params, sizeof(isif_raw_params));
@@ -1041,19 +1041,19 @@ isif_config_culling(struct vpfe_isif_device *isif, struct vpfe_isif_cul *cul)
static int isif_get_pix_fmt(u32 mbus_code)
{
switch (mbus_code) {
- case V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8:
- case V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SGRBG12_1X12:
+ case MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SGRBG12_1X12:
return ISIF_PIXFMT_RAW;
- case V4L2_MBUS_FMT_YUYV8_2X8:
- case V4L2_MBUS_FMT_UYVY8_2X8:
- case V4L2_MBUS_FMT_YUYV10_2X10:
- case V4L2_MBUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_YUYV8_2X8:
+ case MEDIA_BUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_YUYV10_2X10:
+ case MEDIA_BUS_FMT_Y8_1X8:
return ISIF_PIXFMT_YCBCR_8BIT;
- case V4L2_MBUS_FMT_YUYV8_1X16:
- case V4L2_MBUS_FMT_YUYV10_1X20:
+ case MEDIA_BUS_FMT_YUYV8_1X16:
+ case MEDIA_BUS_FMT_YUYV10_1X20:
return ISIF_PIXFMT_YCBCR_16BIT;
default:
@@ -1121,11 +1121,11 @@ static int isif_config_raw(struct v4l2_subdev *sd, int mode)
ISIF_FRM_FMT_MASK) << ISIF_FRM_FMT_SHIFT) | ((pix_fmt &
ISIF_INPUT_MASK) << ISIF_INPUT_SHIFT);
- /* currently only V4L2_MBUS_FMT_SGRBG12_1X12 is
+ /* currently only MEDIA_BUS_FMT_SGRBG12_1X12 is
* supported. shift appropriately depending on
* different MBUS fmt's added
*/
- if (format->code == V4L2_MBUS_FMT_SGRBG12_1X12)
+ if (format->code == MEDIA_BUS_FMT_SGRBG12_1X12)
val |= ((VPFE_ISIF_NO_SHIFT &
ISIF_DATASFT_MASK) << ISIF_DATASFT_SHIFT);
@@ -1154,7 +1154,7 @@ static int isif_config_raw(struct v4l2_subdev *sd, int mode)
/* Configure Gain & Offset */
isif_config_gain_offset(isif);
/* Configure Color pattern */
- if (format->code == V4L2_MBUS_FMT_SGRBG12_1X12)
+ if (format->code == MEDIA_BUS_FMT_SGRBG12_1X12)
val = isif_sgrbg_pattern;
else
/* default set to rggb */
@@ -1254,8 +1254,8 @@ static int isif_config_ycbcr(struct v4l2_subdev *sd, int mode)
(((params->vd_pol & ISIF_VD_POL_MASK) << ISIF_VD_POL_SHIFT));
/* pack the data to 8-bit CCDCCFG */
switch (format->code) {
- case V4L2_MBUS_FMT_YUYV8_2X8:
- case V4L2_MBUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_YUYV8_2X8:
+ case MEDIA_BUS_FMT_UYVY8_2X8:
if (pix_fmt != ISIF_PIXFMT_YCBCR_8BIT) {
pr_debug("Invalid pix_fmt(input mode)\n");
return -EINVAL;
@@ -1266,7 +1266,7 @@ static int isif_config_ycbcr(struct v4l2_subdev *sd, int mode)
ccdcfg = ccdcfg | ISIF_PACK_8BIT | ISIF_YCINSWP_YCBCR;
break;
- case V4L2_MBUS_FMT_YUYV10_2X10:
+ case MEDIA_BUS_FMT_YUYV10_2X10:
if (pix_fmt != ISIF_PIXFMT_YCBCR_8BIT) {
pr_debug("Invalid pix_fmt(input mode)\n");
return -EINVAL;
@@ -1278,7 +1278,7 @@ static int isif_config_ycbcr(struct v4l2_subdev *sd, int mode)
ISIF_BW656_ENABLE;
break;
- case V4L2_MBUS_FMT_YUYV10_1X20:
+ case MEDIA_BUS_FMT_YUYV10_1X20:
if (pix_fmt != ISIF_PIXFMT_YCBCR_16BIT) {
pr_debug("Invalid pix_fmt(input mode)\n");
return -EINVAL;
@@ -1286,7 +1286,7 @@ static int isif_config_ycbcr(struct v4l2_subdev *sd, int mode)
isif_write(isif->isif_cfg.base_addr, 3, REC656IF);
break;
- case V4L2_MBUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_Y8_1X8:
ccdcfg |= ISIF_PACK_8BIT;
ccdcfg |= ISIF_YCINSWP_YCBCR;
if (pix_fmt != ISIF_PIXFMT_YCBCR_8BIT) {
@@ -1295,7 +1295,7 @@ static int isif_config_ycbcr(struct v4l2_subdev *sd, int mode)
}
break;
- case V4L2_MBUS_FMT_YUYV8_1X16:
+ case MEDIA_BUS_FMT_YUYV8_1X16:
if (pix_fmt != ISIF_PIXFMT_YCBCR_16BIT) {
pr_debug("Invalid pix_fmt(input mode)\n");
return -EINVAL;
@@ -1313,8 +1313,8 @@ static int isif_config_ycbcr(struct v4l2_subdev *sd, int mode)
ISIF_PIX_ORDER_SHIFT;
isif_write(isif->isif_cfg.base_addr, ccdcfg, CCDCFG);
/* configure video window */
- if (format->code == V4L2_MBUS_FMT_YUYV10_1X20 ||
- format->code == V4L2_MBUS_FMT_YUYV8_1X16)
+ if (format->code == MEDIA_BUS_FMT_YUYV10_1X20 ||
+ format->code == MEDIA_BUS_FMT_YUYV8_1X16)
isif_setwin(isif, ¶ms->win, params->frm_fmt, 1, mode);
else
isif_setwin(isif, ¶ms->win, params->frm_fmt, 2, mode);
@@ -1345,17 +1345,17 @@ static int isif_configure(struct v4l2_subdev *sd, int mode)
format = &isif->formats[ISIF_PAD_SINK];
switch (format->code) {
- case V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8:
- case V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SGRBG12_1X12:
+ case MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SGRBG12_1X12:
return isif_config_raw(sd, mode);
- case V4L2_MBUS_FMT_YUYV8_2X8:
- case V4L2_MBUS_FMT_UYVY8_2X8:
- case V4L2_MBUS_FMT_YUYV10_2X10:
- case V4L2_MBUS_FMT_Y8_1X8:
- case V4L2_MBUS_FMT_YUYV8_1X16:
- case V4L2_MBUS_FMT_YUYV10_1X20:
+ case MEDIA_BUS_FMT_YUYV8_2X8:
+ case MEDIA_BUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_YUYV10_2X10:
+ case MEDIA_BUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_YUYV8_1X16:
+ case MEDIA_BUS_FMT_YUYV10_1X20:
return isif_config_ycbcr(sd, mode);
default:
@@ -1630,7 +1630,7 @@ isif_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = ISIF_PAD_SINK;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
- format.format.code = V4L2_MBUS_FMT_SGRBG12_1X12;
+ format.format.code = MEDIA_BUS_FMT_SGRBG12_1X12;
format.format.width = MAX_WIDTH;
format.format.height = MAX_HEIGHT;
isif_set_format(sd, fh, &format);
@@ -1638,7 +1638,7 @@ isif_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = ISIF_PAD_SOURCE;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
- format.format.code = V4L2_MBUS_FMT_SGRBG12_1X12;
+ format.format.code = MEDIA_BUS_FMT_SGRBG12_1X12;
format.format.width = MAX_WIDTH;
format.format.height = MAX_HEIGHT;
isif_set_format(sd, fh, &format);
diff --git a/drivers/staging/media/davinci_vpfe/dm365_resizer.c b/drivers/staging/media/davinci_vpfe/dm365_resizer.c
index 8828d6c..522f5c9 100644
--- a/drivers/staging/media/davinci_vpfe/dm365_resizer.c
+++ b/drivers/staging/media/davinci_vpfe/dm365_resizer.c
@@ -35,18 +35,18 @@
#define MIN_OUT_HEIGHT 2
static const unsigned int resizer_input_formats[] = {
- V4L2_MBUS_FMT_UYVY8_2X8,
- V4L2_MBUS_FMT_Y8_1X8,
- V4L2_MBUS_FMT_UV8_1X8,
- V4L2_MBUS_FMT_SGRBG12_1X12,
+ MEDIA_BUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_Y8_1X8,
+ MEDIA_BUS_FMT_UV8_1X8,
+ MEDIA_BUS_FMT_SGRBG12_1X12,
};
static const unsigned int resizer_output_formats[] = {
- V4L2_MBUS_FMT_UYVY8_2X8,
- V4L2_MBUS_FMT_Y8_1X8,
- V4L2_MBUS_FMT_UV8_1X8,
- V4L2_MBUS_FMT_YDYUYDYV8_1X16,
- V4L2_MBUS_FMT_SGRBG12_1X12,
+ MEDIA_BUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_Y8_1X8,
+ MEDIA_BUS_FMT_UV8_1X8,
+ MEDIA_BUS_FMT_YDYUYDYV8_1X16,
+ MEDIA_BUS_FMT_SGRBG12_1X12,
};
/* resizer_calculate_line_length() - This function calculates the line length of
@@ -54,17 +54,17 @@ static const unsigned int resizer_output_formats[] = {
* output.
*/
static void
-resizer_calculate_line_length(enum v4l2_mbus_pixelcode pix, int width,
+resizer_calculate_line_length(enum media_bus_format pix, int width,
int height, int *line_len, int *line_len_c)
{
*line_len = 0;
*line_len_c = 0;
- if (pix == V4L2_MBUS_FMT_UYVY8_2X8 ||
- pix == V4L2_MBUS_FMT_SGRBG12_1X12) {
+ if (pix == MEDIA_BUS_FMT_UYVY8_2X8 ||
+ pix == MEDIA_BUS_FMT_SGRBG12_1X12) {
*line_len = width << 1;
- } else if (pix == V4L2_MBUS_FMT_Y8_1X8 ||
- pix == V4L2_MBUS_FMT_UV8_1X8) {
+ } else if (pix == MEDIA_BUS_FMT_Y8_1X8 ||
+ pix == MEDIA_BUS_FMT_UV8_1X8) {
*line_len = width;
*line_len_c = width;
} else {
@@ -85,11 +85,11 @@ resizer_validate_output_image_format(struct device *dev,
struct v4l2_mbus_framefmt *format,
int *in_line_len, int *in_line_len_c)
{
- if (format->code != V4L2_MBUS_FMT_UYVY8_2X8 &&
- format->code != V4L2_MBUS_FMT_Y8_1X8 &&
- format->code != V4L2_MBUS_FMT_UV8_1X8 &&
- format->code != V4L2_MBUS_FMT_YDYUYDYV8_1X16 &&
- format->code != V4L2_MBUS_FMT_SGRBG12_1X12) {
+ if (format->code != MEDIA_BUS_FMT_UYVY8_2X8 &&
+ format->code != MEDIA_BUS_FMT_Y8_1X8 &&
+ format->code != MEDIA_BUS_FMT_UV8_1X8 &&
+ format->code != MEDIA_BUS_FMT_YDYUYDYV8_1X16 &&
+ format->code != MEDIA_BUS_FMT_SGRBG12_1X12) {
dev_err(dev, "Invalid Mbus format, %d\n", format->code);
return -EINVAL;
}
@@ -281,7 +281,7 @@ resizer_calculate_sdram_offsets(struct vpfe_resizer_device *resizer, int index)
param->ext_mem_param[index].c_offset = 0;
param->ext_mem_param[index].flip_ofst_y = 0;
param->ext_mem_param[index].flip_ofst_c = 0;
- if (outformat->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16) {
+ if (outformat->code == MEDIA_BUS_FMT_YDYUYDYV8_1X16) {
/* YUV 420 */
yuv_420 = 1;
bytesperpixel = 1;
@@ -322,7 +322,7 @@ static int resizer_configure_output_win(struct vpfe_resizer_device *resizer)
outformat = &resizer->resizer_a.formats[RESIZER_PAD_SOURCE];
output_specs.vst_y = param->user_config.vst;
- if (outformat->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16)
+ if (outformat->code == MEDIA_BUS_FMT_YDYUYDYV8_1X16)
output_specs.vst_c = param->user_config.vst;
configure_resizer_out_params(resizer, RSZ_A, &output_specs, 0, 0);
@@ -336,7 +336,7 @@ static int resizer_configure_output_win(struct vpfe_resizer_device *resizer)
if (param->rsz_en[RSZ_B])
resizer_calculate_resize_ratios(resizer, RSZ_B);
- if (outformat->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16)
+ if (outformat->code == MEDIA_BUS_FMT_YDYUYDYV8_1X16)
resizer_enable_422_420_conversion(param, RSZ_A, ENABLE);
else
resizer_enable_422_420_conversion(param, RSZ_A, DISABLE);
@@ -447,26 +447,26 @@ resizer_configure_common_in_params(struct vpfe_resizer_device *resizer)
param->rsz_common.source = IPIPE_DATA;
switch (informat->code) {
- case V4L2_MBUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_UYVY8_2X8:
param->rsz_common.src_img_fmt = RSZ_IMG_422;
param->rsz_common.raw_flip = 0;
break;
- case V4L2_MBUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_Y8_1X8:
param->rsz_common.src_img_fmt = RSZ_IMG_420;
/* Select y */
param->rsz_common.y_c = 0;
param->rsz_common.raw_flip = 0;
break;
- case V4L2_MBUS_FMT_UV8_1X8:
+ case MEDIA_BUS_FMT_UV8_1X8:
param->rsz_common.src_img_fmt = RSZ_IMG_420;
/* Select y */
param->rsz_common.y_c = 1;
param->rsz_common.raw_flip = 0;
break;
- case V4L2_MBUS_FMT_SGRBG12_1X12:
+ case MEDIA_BUS_FMT_SGRBG12_1X12:
param->rsz_common.raw_flip = 1;
break;
@@ -519,7 +519,7 @@ resizer_configure_in_continious_mode(struct vpfe_resizer_device *resizer)
param->ext_mem_param[RSZ_B].rsz_sdr_oft_c = line_len_c;
configure_resizer_out_params(resizer, RSZ_B,
&cont_config->output2, 0, 1);
- if (outformat2->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16)
+ if (outformat2->code == MEDIA_BUS_FMT_YDYUYDYV8_1X16)
resizer_enable_422_420_conversion(param,
RSZ_B, ENABLE);
else
@@ -540,15 +540,15 @@ resizer_configure_in_continious_mode(struct vpfe_resizer_device *resizer)
static inline int
resizer_validate_input_image_format(struct device *dev,
- enum v4l2_mbus_pixelcode pix,
+ enum media_bus_format pix,
int width, int height, int *line_len)
{
int val;
- if (pix != V4L2_MBUS_FMT_UYVY8_2X8 &&
- pix != V4L2_MBUS_FMT_Y8_1X8 &&
- pix != V4L2_MBUS_FMT_UV8_1X8 &&
- pix != V4L2_MBUS_FMT_SGRBG12_1X12) {
+ if (pix != MEDIA_BUS_FMT_UYVY8_2X8 &&
+ pix != MEDIA_BUS_FMT_Y8_1X8 &&
+ pix != MEDIA_BUS_FMT_UV8_1X8 &&
+ pix != MEDIA_BUS_FMT_SGRBG12_1X12) {
dev_err(dev,
"resizer validate output: pix format not supported, %d\n", pix);
return -EINVAL;
@@ -560,7 +560,7 @@ resizer_validate_input_image_format(struct device *dev,
return -EINVAL;
}
- if (pix == V4L2_MBUS_FMT_UV8_1X8)
+ if (pix == MEDIA_BUS_FMT_UV8_1X8)
resizer_calculate_line_length(pix, width,
height, &val, line_len);
else
@@ -709,12 +709,12 @@ resizer_configure_in_single_shot_mode(struct vpfe_resizer_device *resizer)
configure_resizer_out_params(resizer, RSZ_A,
¶m->user_config.output1, 0, 1);
- if (outformat1->code == V4L2_MBUS_FMT_SGRBG12_1X12)
+ if (outformat1->code == MEDIA_BUS_FMT_SGRBG12_1X12)
param->rsz_common.raw_flip = 1;
else
param->rsz_common.raw_flip = 0;
- if (outformat1->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16)
+ if (outformat1->code == MEDIA_BUS_FMT_YDYUYDYV8_1X16)
resizer_enable_422_420_conversion(param,
RSZ_A, ENABLE);
else
@@ -732,7 +732,7 @@ resizer_configure_in_single_shot_mode(struct vpfe_resizer_device *resizer)
param->ext_mem_param[RSZ_B].rsz_sdr_oft_c = line_len_c;
configure_resizer_out_params(resizer, RSZ_B,
¶m->user_config.output2, 0, 1);
- if (outformat2->code == V4L2_MBUS_FMT_YDYUYDYV8_1X16)
+ if (outformat2->code == MEDIA_BUS_FMT_YDYUYDYV8_1X16)
resizer_enable_422_420_conversion(param,
RSZ_B, ENABLE);
else
@@ -745,7 +745,7 @@ resizer_configure_in_single_shot_mode(struct vpfe_resizer_device *resizer)
resizer_calculate_resize_ratios(resizer, RSZ_A);
resizer_calculate_sdram_offsets(resizer, RSZ_A);
/* Overriding resize ratio calculation */
- if (informat->code == V4L2_MBUS_FMT_UV8_1X8) {
+ if (informat->code == MEDIA_BUS_FMT_UV8_1X8) {
param->rsz_rsc_param[RSZ_A].v_dif =
(((informat->height + 1) * 2) * 256) /
(param->rsz_rsc_param[RSZ_A].o_vsz + 1);
@@ -756,7 +756,7 @@ resizer_configure_in_single_shot_mode(struct vpfe_resizer_device *resizer)
resizer_calculate_resize_ratios(resizer, RSZ_B);
resizer_calculate_sdram_offsets(resizer, RSZ_B);
/* Overriding resize ratio calculation */
- if (informat->code == V4L2_MBUS_FMT_UV8_1X8) {
+ if (informat->code == MEDIA_BUS_FMT_UV8_1X8) {
param->rsz_rsc_param[RSZ_B].v_dif =
(((informat->height + 1) * 2) * 256) /
(param->rsz_rsc_param[RSZ_B].o_vsz + 1);
@@ -1340,7 +1340,7 @@ resizer_try_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
}
/* If not found, use UYVY as default */
if (i >= ARRAY_SIZE(resizer_input_formats))
- fmt->code = V4L2_MBUS_FMT_UYVY8_2X8;
+ fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
fmt->width = clamp_t(u32, fmt->width, MIN_IN_WIDTH,
MAX_IN_WIDTH);
@@ -1357,7 +1357,7 @@ resizer_try_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
}
/* If not found, use UYVY as default */
if (i >= ARRAY_SIZE(resizer_output_formats))
- fmt->code = V4L2_MBUS_FMT_UYVY8_2X8;
+ fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
fmt->width = clamp_t(u32, fmt->width, MIN_OUT_WIDTH,
max_out_width);
@@ -1375,7 +1375,7 @@ resizer_try_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
}
/* If not found, use UYVY as default */
if (i >= ARRAY_SIZE(resizer_output_formats))
- fmt->code = V4L2_MBUS_FMT_UYVY8_2X8;
+ fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
fmt->width = clamp_t(u32, fmt->width, MIN_OUT_WIDTH,
max_out_width);
@@ -1548,7 +1548,7 @@ static int resizer_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = RESIZER_CROP_PAD_SINK;
format.which = which;
- format.format.code = V4L2_MBUS_FMT_YUYV8_2X8;
+ format.format.code = MEDIA_BUS_FMT_YUYV8_2X8;
format.format.width = MAX_IN_WIDTH;
format.format.height = MAX_IN_HEIGHT;
resizer_set_format(sd, fh, &format);
@@ -1556,7 +1556,7 @@ static int resizer_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = RESIZER_CROP_PAD_SOURCE;
format.which = which;
- format.format.code = V4L2_MBUS_FMT_UYVY8_2X8;
+ format.format.code = MEDIA_BUS_FMT_UYVY8_2X8;
format.format.width = MAX_IN_WIDTH;
format.format.height = MAX_IN_WIDTH;
resizer_set_format(sd, fh, &format);
@@ -1564,7 +1564,7 @@ static int resizer_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = RESIZER_CROP_PAD_SOURCE2;
format.which = which;
- format.format.code = V4L2_MBUS_FMT_UYVY8_2X8;
+ format.format.code = MEDIA_BUS_FMT_UYVY8_2X8;
format.format.width = MAX_IN_WIDTH;
format.format.height = MAX_IN_WIDTH;
resizer_set_format(sd, fh, &format);
@@ -1572,7 +1572,7 @@ static int resizer_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = RESIZER_PAD_SINK;
format.which = which;
- format.format.code = V4L2_MBUS_FMT_YUYV8_2X8;
+ format.format.code = MEDIA_BUS_FMT_YUYV8_2X8;
format.format.width = MAX_IN_WIDTH;
format.format.height = MAX_IN_HEIGHT;
resizer_set_format(sd, fh, &format);
@@ -1580,7 +1580,7 @@ static int resizer_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = RESIZER_PAD_SOURCE;
format.which = which;
- format.format.code = V4L2_MBUS_FMT_UYVY8_2X8;
+ format.format.code = MEDIA_BUS_FMT_UYVY8_2X8;
format.format.width = IPIPE_MAX_OUTPUT_WIDTH_A;
format.format.height = IPIPE_MAX_OUTPUT_HEIGHT_A;
resizer_set_format(sd, fh, &format);
@@ -1588,7 +1588,7 @@ static int resizer_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = RESIZER_PAD_SINK;
format.which = which;
- format.format.code = V4L2_MBUS_FMT_YUYV8_2X8;
+ format.format.code = MEDIA_BUS_FMT_YUYV8_2X8;
format.format.width = MAX_IN_WIDTH;
format.format.height = MAX_IN_HEIGHT;
resizer_set_format(sd, fh, &format);
@@ -1596,7 +1596,7 @@ static int resizer_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = RESIZER_PAD_SOURCE;
format.which = which;
- format.format.code = V4L2_MBUS_FMT_UYVY8_2X8;
+ format.format.code = MEDIA_BUS_FMT_UYVY8_2X8;
format.format.width = IPIPE_MAX_OUTPUT_WIDTH_B;
format.format.height = IPIPE_MAX_OUTPUT_HEIGHT_B;
resizer_set_format(sd, fh, &format);
diff --git a/drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c b/drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c
index a862b28..bf45d2c 100644
--- a/drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c
+++ b/drivers/staging/media/davinci_vpfe/vpfe_mc_capture.c
@@ -99,47 +99,47 @@ void mbus_to_pix(const struct v4l2_mbus_framefmt *mbus,
struct v4l2_pix_format *pix)
{
switch (mbus->code) {
- case V4L2_MBUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_UYVY8_2X8:
pix->pixelformat = V4L2_PIX_FMT_UYVY;
pix->bytesperline = pix->width * 2;
break;
- case V4L2_MBUS_FMT_YUYV8_2X8:
+ case MEDIA_BUS_FMT_YUYV8_2X8:
pix->pixelformat = V4L2_PIX_FMT_YUYV;
pix->bytesperline = pix->width * 2;
break;
- case V4L2_MBUS_FMT_YUYV10_1X20:
+ case MEDIA_BUS_FMT_YUYV10_1X20:
pix->pixelformat = V4L2_PIX_FMT_UYVY;
pix->bytesperline = pix->width * 2;
break;
- case V4L2_MBUS_FMT_SGRBG12_1X12:
+ case MEDIA_BUS_FMT_SGRBG12_1X12:
pix->pixelformat = V4L2_PIX_FMT_SBGGR16;
pix->bytesperline = pix->width * 2;
break;
- case V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
pix->pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8;
pix->bytesperline = pix->width;
break;
- case V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8:
pix->pixelformat = V4L2_PIX_FMT_SGRBG10ALAW8;
pix->bytesperline = pix->width;
break;
- case V4L2_MBUS_FMT_YDYUYDYV8_1X16:
+ case MEDIA_BUS_FMT_YDYUYDYV8_1X16:
pix->pixelformat = V4L2_PIX_FMT_NV12;
pix->bytesperline = pix->width;
break;
- case V4L2_MBUS_FMT_Y8_1X8:
+ case MEDIA_BUS_FMT_Y8_1X8:
pix->pixelformat = V4L2_PIX_FMT_GREY;
pix->bytesperline = pix->width;
break;
- case V4L2_MBUS_FMT_UV8_1X8:
+ case MEDIA_BUS_FMT_UV8_1X8:
pix->pixelformat = V4L2_PIX_FMT_UV8;
pix->bytesperline = pix->width;
break;
diff --git a/drivers/staging/media/omap4iss/iss_csi2.c b/drivers/staging/media/omap4iss/iss_csi2.c
index 92c2d5b..b72e530 100644
--- a/drivers/staging/media/omap4iss/iss_csi2.c
+++ b/drivers/staging/media/omap4iss/iss_csi2.c
@@ -93,20 +93,20 @@ static void csi2_recv_config(struct iss_csi2_device *csi2,
}
static const unsigned int csi2_input_fmts[] = {
- V4L2_MBUS_FMT_SGRBG10_1X10,
- V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
- V4L2_MBUS_FMT_SRGGB10_1X10,
- V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8,
- V4L2_MBUS_FMT_SBGGR10_1X10,
- V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8,
- V4L2_MBUS_FMT_SGBRG10_1X10,
- V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8,
- V4L2_MBUS_FMT_SBGGR8_1X8,
- V4L2_MBUS_FMT_SGBRG8_1X8,
- V4L2_MBUS_FMT_SGRBG8_1X8,
- V4L2_MBUS_FMT_SRGGB8_1X8,
- V4L2_MBUS_FMT_UYVY8_1X16,
- V4L2_MBUS_FMT_YUYV8_1X16,
+ MEDIA_BUS_FMT_SGRBG10_1X10,
+ MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
+ MEDIA_BUS_FMT_SRGGB10_1X10,
+ MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
+ MEDIA_BUS_FMT_SBGGR10_1X10,
+ MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
+ MEDIA_BUS_FMT_SGBRG10_1X10,
+ MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
+ MEDIA_BUS_FMT_SBGGR8_1X8,
+ MEDIA_BUS_FMT_SGBRG8_1X8,
+ MEDIA_BUS_FMT_SGRBG8_1X8,
+ MEDIA_BUS_FMT_SRGGB8_1X8,
+ MEDIA_BUS_FMT_UYVY8_1X16,
+ MEDIA_BUS_FMT_YUYV8_1X16,
};
/* To set the format on the CSI2 requires a mapping function that takes
@@ -201,26 +201,26 @@ static u16 csi2_ctx_map_format(struct iss_csi2_device *csi2)
int fmtidx, destidx;
switch (fmt->code) {
- case V4L2_MBUS_FMT_SGRBG10_1X10:
- case V4L2_MBUS_FMT_SRGGB10_1X10:
- case V4L2_MBUS_FMT_SBGGR10_1X10:
- case V4L2_MBUS_FMT_SGBRG10_1X10:
+ case MEDIA_BUS_FMT_SGRBG10_1X10:
+ case MEDIA_BUS_FMT_SRGGB10_1X10:
+ case MEDIA_BUS_FMT_SBGGR10_1X10:
+ case MEDIA_BUS_FMT_SGBRG10_1X10:
fmtidx = 0;
break;
- case V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8:
fmtidx = 1;
break;
- case V4L2_MBUS_FMT_SBGGR8_1X8:
- case V4L2_MBUS_FMT_SGBRG8_1X8:
- case V4L2_MBUS_FMT_SGRBG8_1X8:
- case V4L2_MBUS_FMT_SRGGB8_1X8:
+ case MEDIA_BUS_FMT_SBGGR8_1X8:
+ case MEDIA_BUS_FMT_SGBRG8_1X8:
+ case MEDIA_BUS_FMT_SGRBG8_1X8:
+ case MEDIA_BUS_FMT_SRGGB8_1X8:
fmtidx = 2;
break;
- case V4L2_MBUS_FMT_UYVY8_1X16:
- case V4L2_MBUS_FMT_YUYV8_1X16:
+ case MEDIA_BUS_FMT_UYVY8_1X16:
+ case MEDIA_BUS_FMT_YUYV8_1X16:
fmtidx = 3;
break;
default:
@@ -817,7 +817,7 @@ csi2_try_format(struct iss_csi2_device *csi2, struct v4l2_subdev_fh *fh,
unsigned int pad, struct v4l2_mbus_framefmt *fmt,
enum v4l2_subdev_format_whence which)
{
- enum v4l2_mbus_pixelcode pixelcode;
+ enum media_bus_format pixelcode;
struct v4l2_mbus_framefmt *format;
const struct iss_format_info *info;
unsigned int i;
@@ -832,7 +832,7 @@ csi2_try_format(struct iss_csi2_device *csi2, struct v4l2_subdev_fh *fh,
/* If not found, use SGRBG10 as default */
if (i >= ARRAY_SIZE(csi2_input_fmts))
- fmt->code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
fmt->width = clamp_t(u32, fmt->width, 1, 8191);
fmt->height = clamp_t(u32, fmt->height, 1, 8191);
@@ -1020,7 +1020,7 @@ static int csi2_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
memset(&format, 0, sizeof(format));
format.pad = CSI2_PAD_SINK;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
- format.format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
format.format.width = 4096;
format.format.height = 4096;
csi2_set_format(sd, fh, &format);
diff --git a/drivers/staging/media/omap4iss/iss_ipipe.c b/drivers/staging/media/omap4iss/iss_ipipe.c
index 5404200..a1a46ef 100644
--- a/drivers/staging/media/omap4iss/iss_ipipe.c
+++ b/drivers/staging/media/omap4iss/iss_ipipe.c
@@ -28,10 +28,10 @@ __ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
unsigned int pad, enum v4l2_subdev_format_whence which);
static const unsigned int ipipe_fmts[] = {
- V4L2_MBUS_FMT_SGRBG10_1X10,
- V4L2_MBUS_FMT_SRGGB10_1X10,
- V4L2_MBUS_FMT_SBGGR10_1X10,
- V4L2_MBUS_FMT_SGBRG10_1X10,
+ MEDIA_BUS_FMT_SGRBG10_1X10,
+ MEDIA_BUS_FMT_SRGGB10_1X10,
+ MEDIA_BUS_FMT_SBGGR10_1X10,
+ MEDIA_BUS_FMT_SGBRG10_1X10,
};
/*
@@ -211,7 +211,7 @@ ipipe_try_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
/* If not found, use SGRBG10 as default */
if (i >= ARRAY_SIZE(ipipe_fmts))
- fmt->code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
/* Clamp the input size. */
fmt->width = clamp_t(u32, width, 1, 8192);
@@ -223,7 +223,7 @@ ipipe_try_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
format = __ipipe_get_format(ipipe, fh, IPIPE_PAD_SINK, which);
memcpy(fmt, format, sizeof(*fmt));
- fmt->code = V4L2_MBUS_FMT_UYVY8_1X16;
+ fmt->code = MEDIA_BUS_FMT_UYVY8_1X16;
fmt->width = clamp_t(u32, width, 32, fmt->width);
fmt->height = clamp_t(u32, height, 32, fmt->height);
fmt->colorspace = V4L2_COLORSPACE_JPEG;
@@ -257,7 +257,7 @@ static int ipipe_enum_mbus_code(struct v4l2_subdev *sd,
if (code->index != 0)
return -EINVAL;
- code->code = V4L2_MBUS_FMT_UYVY8_1X16;
+ code->code = MEDIA_BUS_FMT_UYVY8_1X16;
break;
default:
@@ -385,7 +385,7 @@ static int ipipe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
memset(&format, 0, sizeof(format));
format.pad = IPIPE_PAD_SINK;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
- format.format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
format.format.width = 4096;
format.format.height = 4096;
ipipe_set_format(sd, fh, &format);
diff --git a/drivers/staging/media/omap4iss/iss_ipipeif.c b/drivers/staging/media/omap4iss/iss_ipipeif.c
index 75f6a15..32a7483 100644
--- a/drivers/staging/media/omap4iss/iss_ipipeif.c
+++ b/drivers/staging/media/omap4iss/iss_ipipeif.c
@@ -24,12 +24,12 @@
#include "iss_ipipeif.h"
static const unsigned int ipipeif_fmts[] = {
- V4L2_MBUS_FMT_SGRBG10_1X10,
- V4L2_MBUS_FMT_SRGGB10_1X10,
- V4L2_MBUS_FMT_SBGGR10_1X10,
- V4L2_MBUS_FMT_SGBRG10_1X10,
- V4L2_MBUS_FMT_UYVY8_1X16,
- V4L2_MBUS_FMT_YUYV8_1X16,
+ MEDIA_BUS_FMT_SGRBG10_1X10,
+ MEDIA_BUS_FMT_SRGGB10_1X10,
+ MEDIA_BUS_FMT_SBGGR10_1X10,
+ MEDIA_BUS_FMT_SGBRG10_1X10,
+ MEDIA_BUS_FMT_UYVY8_1X16,
+ MEDIA_BUS_FMT_YUYV8_1X16,
};
/*
@@ -140,8 +140,8 @@ static void ipipeif_configure(struct iss_ipipeif_device *ipipeif)
/* Select ISIF/IPIPEIF input format */
switch (format->code) {
- case V4L2_MBUS_FMT_UYVY8_1X16:
- case V4L2_MBUS_FMT_YUYV8_1X16:
+ case MEDIA_BUS_FMT_UYVY8_1X16:
+ case MEDIA_BUS_FMT_YUYV8_1X16:
iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_MODESET,
ISIF_MODESET_CCDMD | ISIF_MODESET_INPMOD_MASK |
ISIF_MODESET_CCDW_MASK,
@@ -151,25 +151,25 @@ static void ipipeif_configure(struct iss_ipipeif_device *ipipeif)
IPIPEIF_CFG2_YUV8, IPIPEIF_CFG2_YUV16);
break;
- case V4L2_MBUS_FMT_SGRBG10_1X10:
+ case MEDIA_BUS_FMT_SGRBG10_1X10:
isif_ccolp = ISIF_CCOLP_CP0_F0_GR |
ISIF_CCOLP_CP1_F0_R |
ISIF_CCOLP_CP2_F0_B |
ISIF_CCOLP_CP3_F0_GB;
goto cont_raw;
- case V4L2_MBUS_FMT_SRGGB10_1X10:
+ case MEDIA_BUS_FMT_SRGGB10_1X10:
isif_ccolp = ISIF_CCOLP_CP0_F0_R |
ISIF_CCOLP_CP1_F0_GR |
ISIF_CCOLP_CP2_F0_GB |
ISIF_CCOLP_CP3_F0_B;
goto cont_raw;
- case V4L2_MBUS_FMT_SBGGR10_1X10:
+ case MEDIA_BUS_FMT_SBGGR10_1X10:
isif_ccolp = ISIF_CCOLP_CP0_F0_B |
ISIF_CCOLP_CP1_F0_GB |
ISIF_CCOLP_CP2_F0_GR |
ISIF_CCOLP_CP3_F0_R;
goto cont_raw;
- case V4L2_MBUS_FMT_SGBRG10_1X10:
+ case MEDIA_BUS_FMT_SGBRG10_1X10:
isif_ccolp = ISIF_CCOLP_CP0_F0_GB |
ISIF_CCOLP_CP1_F0_B |
ISIF_CCOLP_CP2_F0_R |
@@ -415,7 +415,7 @@ ipipeif_try_format(struct iss_ipipeif_device *ipipeif,
/* If not found, use SGRBG10 as default */
if (i >= ARRAY_SIZE(ipipeif_fmts))
- fmt->code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
/* Clamp the input size. */
fmt->width = clamp_t(u32, width, 1, 8192);
@@ -625,7 +625,7 @@ static int ipipeif_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = IPIPEIF_PAD_SINK;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
- format.format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
format.format.width = 4096;
format.format.height = 4096;
ipipeif_set_format(sd, fh, &format);
diff --git a/drivers/staging/media/omap4iss/iss_resizer.c b/drivers/staging/media/omap4iss/iss_resizer.c
index a21e356..54be1270 100644
--- a/drivers/staging/media/omap4iss/iss_resizer.c
+++ b/drivers/staging/media/omap4iss/iss_resizer.c
@@ -24,8 +24,8 @@
#include "iss_resizer.h"
static const unsigned int resizer_fmts[] = {
- V4L2_MBUS_FMT_UYVY8_1X16,
- V4L2_MBUS_FMT_YUYV8_1X16,
+ MEDIA_BUS_FMT_UYVY8_1X16,
+ MEDIA_BUS_FMT_YUYV8_1X16,
};
/*
@@ -156,8 +156,8 @@ static void resizer_set_outaddr(struct iss_resizer_device *resizer, u32 addr)
addr & 0xffff);
/* Program UV buffer address... Hardcoded to be contiguous! */
- if ((informat->code == V4L2_MBUS_FMT_UYVY8_1X16) &&
- (outformat->code == V4L2_MBUS_FMT_YUYV8_1_5X8)) {
+ if ((informat->code == MEDIA_BUS_FMT_UYVY8_1X16) &&
+ (outformat->code == MEDIA_BUS_FMT_YUYV8_1_5X8)) {
u32 c_addr = addr + (resizer->video_out.bpl_value *
(outformat->height - 1));
@@ -242,8 +242,8 @@ static void resizer_configure(struct iss_resizer_device *resizer)
resizer->video_out.bpl_value);
/* UYVY -> NV12 conversion */
- if ((informat->code == V4L2_MBUS_FMT_UYVY8_1X16) &&
- (outformat->code == V4L2_MBUS_FMT_YUYV8_1_5X8)) {
+ if ((informat->code == MEDIA_BUS_FMT_UYVY8_1X16) &&
+ (outformat->code == MEDIA_BUS_FMT_YUYV8_1_5X8)) {
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_420,
RSZ_420_CEN | RSZ_420_YEN);
@@ -457,7 +457,7 @@ resizer_try_format(struct iss_resizer_device *resizer,
struct v4l2_mbus_framefmt *fmt,
enum v4l2_subdev_format_whence which)
{
- enum v4l2_mbus_pixelcode pixelcode;
+ enum media_bus_format pixelcode;
struct v4l2_mbus_framefmt *format;
unsigned int width = fmt->width;
unsigned int height = fmt->height;
@@ -472,7 +472,7 @@ resizer_try_format(struct iss_resizer_device *resizer,
/* If not found, use UYVY as default */
if (i >= ARRAY_SIZE(resizer_fmts))
- fmt->code = V4L2_MBUS_FMT_UYVY8_1X16;
+ fmt->code = MEDIA_BUS_FMT_UYVY8_1X16;
/* Clamp the input size. */
fmt->width = clamp_t(u32, width, 1, 8192);
@@ -485,8 +485,8 @@ resizer_try_format(struct iss_resizer_device *resizer,
which);
memcpy(fmt, format, sizeof(*fmt));
- if ((pixelcode == V4L2_MBUS_FMT_YUYV8_1_5X8) &&
- (fmt->code == V4L2_MBUS_FMT_UYVY8_1X16))
+ if ((pixelcode == MEDIA_BUS_FMT_YUYV8_1_5X8) &&
+ (fmt->code == MEDIA_BUS_FMT_UYVY8_1X16))
fmt->code = pixelcode;
/* The data formatter truncates the number of horizontal output
@@ -537,9 +537,9 @@ static int resizer_enum_mbus_code(struct v4l2_subdev *sd,
}
switch (format->code) {
- case V4L2_MBUS_FMT_UYVY8_1X16:
+ case MEDIA_BUS_FMT_UYVY8_1X16:
if (code->index == 1)
- code->code = V4L2_MBUS_FMT_YUYV8_1_5X8;
+ code->code = MEDIA_BUS_FMT_YUYV8_1_5X8;
else
return -EINVAL;
break;
@@ -680,7 +680,7 @@ static int resizer_init_formats(struct v4l2_subdev *sd,
memset(&format, 0, sizeof(format));
format.pad = RESIZER_PAD_SINK;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
- format.format.code = V4L2_MBUS_FMT_UYVY8_1X16;
+ format.format.code = MEDIA_BUS_FMT_UYVY8_1X16;
format.format.width = 4096;
format.format.height = 4096;
resizer_set_format(sd, fh, &format);
diff --git a/drivers/staging/media/omap4iss/iss_video.c b/drivers/staging/media/omap4iss/iss_video.c
index 5d62503..01a8b61 100644
--- a/drivers/staging/media/omap4iss/iss_video.c
+++ b/drivers/staging/media/omap4iss/iss_video.c
@@ -34,67 +34,67 @@ MODULE_PARM_DESC(debug, "activates debug info");
*/
static struct iss_format_info formats[] = {
- { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8,
- V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8,
+ { MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
+ MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
V4L2_PIX_FMT_GREY, 8, "Greyscale 8 bpp", },
- { V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y10_1X10,
- V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y8_1X8,
+ { MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10,
+ MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8,
V4L2_PIX_FMT_Y10, 10, "Greyscale 10 bpp", },
- { V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y10_1X10,
- V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y8_1X8,
+ { MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10,
+ MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8,
V4L2_PIX_FMT_Y12, 12, "Greyscale 12 bpp", },
- { V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8,
- V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8,
+ { MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
+ MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
V4L2_PIX_FMT_SBGGR8, 8, "BGGR Bayer 8 bpp", },
- { V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8,
- V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8,
+ { MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
+ MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
V4L2_PIX_FMT_SGBRG8, 8, "GBRG Bayer 8 bpp", },
- { V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8,
- V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8,
+ { MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
+ MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
V4L2_PIX_FMT_SGRBG8, 8, "GRBG Bayer 8 bpp", },
- { V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8,
- V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8,
+ { MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
+ MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
V4L2_PIX_FMT_SRGGB8, 8, "RGGB Bayer 8 bpp", },
- { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
- V4L2_MBUS_FMT_SGRBG10_1X10, 0,
+ { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
+ MEDIA_BUS_FMT_SGRBG10_1X10, 0,
V4L2_PIX_FMT_SGRBG10DPCM8, 8, "GRBG Bayer 10 bpp DPCM8", },
- { V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10,
- V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR8_1X8,
+ { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10,
+ MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8,
V4L2_PIX_FMT_SBGGR10, 10, "BGGR Bayer 10 bpp", },
- { V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10,
- V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG8_1X8,
+ { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10,
+ MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8,
V4L2_PIX_FMT_SGBRG10, 10, "GBRG Bayer 10 bpp", },
- { V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG10_1X10,
- V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG8_1X8,
+ { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10,
+ MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8,
V4L2_PIX_FMT_SGRBG10, 10, "GRBG Bayer 10 bpp", },
- { V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10,
- V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB8_1X8,
+ { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10,
+ MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8,
V4L2_PIX_FMT_SRGGB10, 10, "RGGB Bayer 10 bpp", },
- { V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR10_1X10,
- V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR8_1X8,
+ { MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10,
+ MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8,
V4L2_PIX_FMT_SBGGR12, 12, "BGGR Bayer 12 bpp", },
- { V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG10_1X10,
- V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG8_1X8,
+ { MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10,
+ MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8,
V4L2_PIX_FMT_SGBRG12, 12, "GBRG Bayer 12 bpp", },
- { V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG10_1X10,
- V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG8_1X8,
+ { MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10,
+ MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8,
V4L2_PIX_FMT_SGRBG12, 12, "GRBG Bayer 12 bpp", },
- { V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB10_1X10,
- V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB8_1X8,
+ { MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10,
+ MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8,
V4L2_PIX_FMT_SRGGB12, 12, "RGGB Bayer 12 bpp", },
- { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16,
- V4L2_MBUS_FMT_UYVY8_1X16, 0,
+ { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16,
+ MEDIA_BUS_FMT_UYVY8_1X16, 0,
V4L2_PIX_FMT_UYVY, 16, "YUV 4:2:2 (UYVY)", },
- { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16,
- V4L2_MBUS_FMT_YUYV8_1X16, 0,
+ { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16,
+ MEDIA_BUS_FMT_YUYV8_1X16, 0,
V4L2_PIX_FMT_YUYV, 16, "YUV 4:2:2 (YUYV)", },
- { V4L2_MBUS_FMT_YUYV8_1_5X8, V4L2_MBUS_FMT_YUYV8_1_5X8,
- V4L2_MBUS_FMT_YUYV8_1_5X8, 0,
+ { MEDIA_BUS_FMT_YUYV8_1_5X8, MEDIA_BUS_FMT_YUYV8_1_5X8,
+ MEDIA_BUS_FMT_YUYV8_1_5X8, 0,
V4L2_PIX_FMT_NV12, 8, "YUV 4:2:0 (NV12)", },
};
const struct iss_format_info *
-omap4iss_video_format_info(enum v4l2_mbus_pixelcode code)
+omap4iss_video_format_info(enum media_bus_format code)
{
unsigned int i;
diff --git a/drivers/staging/media/omap4iss/iss_video.h b/drivers/staging/media/omap4iss/iss_video.h
index 9dccdb1..cc8146b 100644
--- a/drivers/staging/media/omap4iss/iss_video.h
+++ b/drivers/staging/media/omap4iss/iss_video.h
@@ -43,10 +43,10 @@ struct v4l2_pix_format;
* @description: Human-readable format description
*/
struct iss_format_info {
- enum v4l2_mbus_pixelcode code;
- enum v4l2_mbus_pixelcode truncated;
- enum v4l2_mbus_pixelcode uncompressed;
- enum v4l2_mbus_pixelcode flavor;
+ enum media_bus_format code;
+ enum media_bus_format truncated;
+ enum media_bus_format uncompressed;
+ enum media_bus_format flavor;
u32 pixelformat;
unsigned int bpp;
const char *description;
@@ -199,6 +199,6 @@ void omap4iss_video_cancel_stream(struct iss_video *video);
struct media_pad *omap4iss_video_remote_pad(struct iss_video *video);
const struct iss_format_info *
-omap4iss_video_format_info(enum v4l2_mbus_pixelcode code);
+omap4iss_video_format_info(enum media_bus_format code);
#endif /* OMAP4_ISS_VIDEO_H */
--
1.9.1
^ permalink raw reply related
* [PATCH v2 09/10] gpu: ipu-v3: Make use of media_bus_format enum
From: Boris Brezillon @ 2014-11-06 9:57 UTC (permalink / raw)
To: Mauro Carvalho Chehab, Hans Verkuil, Laurent Pinchart,
linux-media
Cc: devel, Boris Brezillon, linux-doc, linux-api, linux-kernel,
Guennadi Liakhovetski, linux-arm-kernel
In-Reply-To: <1415267829-4177-1-git-send-email-boris.brezillon@free-electrons.com>
In order to have subsytem agnostic media bus format definitions we've
moved media bus definition to include/uapi/linux/media-bus-format.h and
prefixed enum values with MEDIA_BUS_FMT instead of V4L2_MBUS_FMT.
Reference new definitions in the ipu-v3 driver.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
drivers/gpu/ipu-v3/ipu-csi.c | 66 ++++++++++++++++++++++----------------------
1 file changed, 33 insertions(+), 33 deletions(-)
diff --git a/drivers/gpu/ipu-v3/ipu-csi.c b/drivers/gpu/ipu-v3/ipu-csi.c
index d6f56471..752cdd2 100644
--- a/drivers/gpu/ipu-v3/ipu-csi.c
+++ b/drivers/gpu/ipu-v3/ipu-csi.c
@@ -227,83 +227,83 @@ static int ipu_csi_set_testgen_mclk(struct ipu_csi *csi, u32 pixel_clk,
static int mbus_code_to_bus_cfg(struct ipu_csi_bus_config *cfg, u32 mbus_code)
{
switch (mbus_code) {
- case V4L2_MBUS_FMT_BGR565_2X8_BE:
- case V4L2_MBUS_FMT_BGR565_2X8_LE:
- case V4L2_MBUS_FMT_RGB565_2X8_BE:
- case V4L2_MBUS_FMT_RGB565_2X8_LE:
+ case MEDIA_BUS_FMT_BGR565_2X8_BE:
+ case MEDIA_BUS_FMT_BGR565_2X8_LE:
+ case MEDIA_BUS_FMT_RGB565_2X8_BE:
+ case MEDIA_BUS_FMT_RGB565_2X8_LE:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_RGB565;
cfg->mipi_dt = MIPI_DT_RGB565;
cfg->data_width = IPU_CSI_DATA_WIDTH_8;
break;
- case V4L2_MBUS_FMT_RGB444_2X8_PADHI_BE:
- case V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE:
+ case MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE:
+ case MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_RGB444;
cfg->mipi_dt = MIPI_DT_RGB444;
cfg->data_width = IPU_CSI_DATA_WIDTH_8;
break;
- case V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE:
- case V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE:
+ case MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE:
+ case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_RGB555;
cfg->mipi_dt = MIPI_DT_RGB555;
cfg->data_width = IPU_CSI_DATA_WIDTH_8;
break;
- case V4L2_MBUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_UYVY8_2X8:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_YUV422_UYVY;
cfg->mipi_dt = MIPI_DT_YUV422;
cfg->data_width = IPU_CSI_DATA_WIDTH_8;
break;
- case V4L2_MBUS_FMT_YUYV8_2X8:
+ case MEDIA_BUS_FMT_YUYV8_2X8:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_YUV422_YUYV;
cfg->mipi_dt = MIPI_DT_YUV422;
cfg->data_width = IPU_CSI_DATA_WIDTH_8;
break;
- case V4L2_MBUS_FMT_UYVY8_1X16:
+ case MEDIA_BUS_FMT_UYVY8_1X16:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_YUV422_UYVY;
cfg->mipi_dt = MIPI_DT_YUV422;
cfg->data_width = IPU_CSI_DATA_WIDTH_16;
break;
- case V4L2_MBUS_FMT_YUYV8_1X16:
+ case MEDIA_BUS_FMT_YUYV8_1X16:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_YUV422_YUYV;
cfg->mipi_dt = MIPI_DT_YUV422;
cfg->data_width = IPU_CSI_DATA_WIDTH_16;
break;
- case V4L2_MBUS_FMT_SBGGR8_1X8:
- case V4L2_MBUS_FMT_SGBRG8_1X8:
- case V4L2_MBUS_FMT_SGRBG8_1X8:
- case V4L2_MBUS_FMT_SRGGB8_1X8:
+ case MEDIA_BUS_FMT_SBGGR8_1X8:
+ case MEDIA_BUS_FMT_SGBRG8_1X8:
+ case MEDIA_BUS_FMT_SGRBG8_1X8:
+ case MEDIA_BUS_FMT_SRGGB8_1X8:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_BAYER;
cfg->mipi_dt = MIPI_DT_RAW8;
cfg->data_width = IPU_CSI_DATA_WIDTH_8;
break;
- case V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8:
- case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE:
- case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE:
- case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE:
- case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE:
+ case MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8:
+ case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE:
+ case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE:
+ case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE:
+ case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_BAYER;
cfg->mipi_dt = MIPI_DT_RAW10;
cfg->data_width = IPU_CSI_DATA_WIDTH_8;
break;
- case V4L2_MBUS_FMT_SBGGR10_1X10:
- case V4L2_MBUS_FMT_SGBRG10_1X10:
- case V4L2_MBUS_FMT_SGRBG10_1X10:
- case V4L2_MBUS_FMT_SRGGB10_1X10:
+ case MEDIA_BUS_FMT_SBGGR10_1X10:
+ case MEDIA_BUS_FMT_SGBRG10_1X10:
+ case MEDIA_BUS_FMT_SGRBG10_1X10:
+ case MEDIA_BUS_FMT_SRGGB10_1X10:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_BAYER;
cfg->mipi_dt = MIPI_DT_RAW10;
cfg->data_width = IPU_CSI_DATA_WIDTH_10;
break;
- case V4L2_MBUS_FMT_SBGGR12_1X12:
- case V4L2_MBUS_FMT_SGBRG12_1X12:
- case V4L2_MBUS_FMT_SGRBG12_1X12:
- case V4L2_MBUS_FMT_SRGGB12_1X12:
+ case MEDIA_BUS_FMT_SBGGR12_1X12:
+ case MEDIA_BUS_FMT_SGBRG12_1X12:
+ case MEDIA_BUS_FMT_SGRBG12_1X12:
+ case MEDIA_BUS_FMT_SRGGB12_1X12:
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_BAYER;
cfg->mipi_dt = MIPI_DT_RAW12;
cfg->data_width = IPU_CSI_DATA_WIDTH_12;
break;
- case V4L2_MBUS_FMT_JPEG_1X8:
+ case MEDIA_BUS_FMT_JPEG_1X8:
/* TODO */
cfg->data_fmt = CSI_SENS_CONF_DATA_FMT_JPEG;
cfg->mipi_dt = MIPI_DT_RAW8;
--
1.9.1
^ permalink raw reply related
* [PATCH v2 10/10] [media] v4l: Forbid usage of V4L2_MBUS_FMT definitions inside the kernel
From: Boris Brezillon @ 2014-11-06 9:57 UTC (permalink / raw)
To: Mauro Carvalho Chehab, Hans Verkuil, Laurent Pinchart,
linux-media
Cc: linux-arm-kernel, linux-api, devel, linux-kernel, linux-doc,
Guennadi Liakhovetski, Boris Brezillon
In-Reply-To: <1415267829-4177-1-git-send-email-boris.brezillon@free-electrons.com>
Place v4l2_mbus_pixelcode in a #ifndef __KERNEL__ section so that kernel
users don't have access to these definitions.
We have to keep this definition for user-space users even though they're
encouraged to move to the new media_bus_format enum.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
include/uapi/linux/media-bus-format.h | 5 +++++
include/uapi/linux/v4l2-mediabus.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/include/uapi/linux/media-bus-format.h b/include/uapi/linux/media-bus-format.h
index 251a902..d7f9ea2 100644
--- a/include/uapi/linux/media-bus-format.h
+++ b/include/uapi/linux/media-bus-format.h
@@ -31,9 +31,14 @@
* new pixel codes.
*/
+#ifdef __KERNEL__
+#define MEDIA_BUS_FMT_ENTRY(name, val) MEDIA_BUS_FMT_ ## name = val
+#else
+/* Keep V4L2_MBUS_FMT for backwards compatibility */
#define MEDIA_BUS_FMT_ENTRY(name, val) \
MEDIA_BUS_FMT_ ## name = val, \
V4L2_MBUS_FMT_ ## name = val
+#endif
enum media_bus_format {
MEDIA_BUS_FMT_ENTRY(FIXED, 0x0001),
diff --git a/include/uapi/linux/v4l2-mediabus.h b/include/uapi/linux/v4l2-mediabus.h
index d30526c..8759002 100644
--- a/include/uapi/linux/v4l2-mediabus.h
+++ b/include/uapi/linux/v4l2-mediabus.h
@@ -15,7 +15,9 @@
#include <linux/videodev2.h>
#include <linux/media-bus-format.h>
+#ifndef __KERNEL__
#define v4l2_mbus_pixelcode media_bus_format
+#endif
/**
* struct v4l2_mbus_framefmt - frame format on the media bus
--
1.9.1
^ permalink raw reply related
* Re: [Cluster-devel] [PATCH v5 6/7] fs: pass iocb to generic_write_sync
From: Steven Whitehouse @ 2014-11-06 10:18 UTC (permalink / raw)
To: Milosz Tanski, linux-kernel
Cc: linux-arch, linux-aio, Volker Lendecke, Theodore Ts'o,
linux-xfs, linux-cifs, linux-ntfs-dev, linux-api, Tejun Heo,
Jeff Moyer, cluster-devel, Mel Gorman, linux-fsdevel,
Michael Kerrisk, linux-ext4, Christoph Hellwig, linux-btrfs,
Al Viro, Andrew Price
In-Reply-To: <5d53ede333de7cade713190e2b93e2dbadefa260.1415220890.git.milosz@adfin.com>
Hi,
On 05/11/14 21:14, Milosz Tanski wrote:
> From: Christoph Hellwig <hch@lst.de>
>
> Clean up the generic_write_sync by just passing an iocb and a bytes
> written / negative errno argument. In addition to simplifying the
> callers this also prepares for passing a per-operation O_DSYNC
> flag. Two callers didn't quite fit that scheme:
>
> - dio_complete didn't both to update ki_pos as we don't need it
> on a iocb that is about to be freed, so we had to add it. Additionally
> it also synced out written data in the error case, which has been
> changed to operate like the other callers.
> - gfs2 also used generic_write_sync to implement a crude version
> of fallocate. It has been switched to use an open coded variant
> instead.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
GFS2 bits:
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
I know that Andy Price has some work in this area too, so in due course
we'll have to be careful not to create a merge conflict here. Copying in
Andy so he can see the changes,
Steve.
> ---
> fs/block_dev.c | 8 +-------
> fs/btrfs/file.c | 7 ++-----
> fs/cifs/file.c | 8 +-------
> fs/direct-io.c | 8 ++------
> fs/ext4/file.c | 8 +-------
> fs/gfs2/file.c | 9 +++++++--
> fs/ntfs/file.c | 8 ++------
> fs/udf/file.c | 11 ++---------
> fs/xfs/xfs_file.c | 8 +-------
> include/linux/fs.h | 8 +-------
> mm/filemap.c | 30 ++++++++++++++++++++----------
> 11 files changed, 40 insertions(+), 73 deletions(-)
>
> diff --git a/fs/block_dev.c b/fs/block_dev.c
> index cc9d411..c529b1c 100644
> --- a/fs/block_dev.c
> +++ b/fs/block_dev.c
> @@ -1568,18 +1568,12 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
> */
> ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
> {
> - struct file *file = iocb->ki_filp;
> struct blk_plug plug;
> ssize_t ret;
>
> blk_start_plug(&plug);
> ret = __generic_file_write_iter(iocb, from);
> - if (ret > 0) {
> - ssize_t err;
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> + ret = generic_write_sync(iocb, ret);
> blk_finish_plug(&plug);
> return ret;
> }
> diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
> index a18ceab..4f4a6f7 100644
> --- a/fs/btrfs/file.c
> +++ b/fs/btrfs/file.c
> @@ -1820,11 +1820,8 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
> */
> BTRFS_I(inode)->last_trans = root->fs_info->generation + 1;
> BTRFS_I(inode)->last_sub_trans = root->log_transid;
> - if (num_written > 0) {
> - err = generic_write_sync(file, pos, num_written);
> - if (err < 0)
> - num_written = err;
> - }
> +
> + num_written = generic_write_sync(iocb, num_written);
>
> if (sync)
> atomic_dec(&BTRFS_I(inode)->sync_writers);
> diff --git a/fs/cifs/file.c b/fs/cifs/file.c
> index c485afa..32359de 100644
> --- a/fs/cifs/file.c
> +++ b/fs/cifs/file.c
> @@ -2706,13 +2706,7 @@ cifs_writev(struct kiocb *iocb, struct iov_iter *from)
> rc = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (rc > 0) {
> - ssize_t err;
> -
> - err = generic_write_sync(file, iocb->ki_pos - rc, rc);
> - if (err < 0)
> - rc = err;
> - }
> + rc = generic_write_sync(iocb, rc);
> } else {
> mutex_unlock(&inode->i_mutex);
> }
> diff --git a/fs/direct-io.c b/fs/direct-io.c
> index e181b6b..b72ac83 100644
> --- a/fs/direct-io.c
> +++ b/fs/direct-io.c
> @@ -257,12 +257,8 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret,
> inode_dio_done(dio->inode);
> if (is_async) {
> if (dio->rw & WRITE) {
> - int err;
> -
> - err = generic_write_sync(dio->iocb->ki_filp, offset,
> - transferred);
> - if (err < 0 && ret > 0)
> - ret = err;
> + dio->iocb->ki_pos = offset + transferred;
> + ret = generic_write_sync(dio->iocb, ret);
> }
>
> aio_complete(dio->iocb, ret, 0);
> diff --git a/fs/ext4/file.c b/fs/ext4/file.c
> index aca7b24..79b000c 100644
> --- a/fs/ext4/file.c
> +++ b/fs/ext4/file.c
> @@ -175,13 +175,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> ret = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (ret > 0) {
> - ssize_t err;
> -
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> + ret = generic_write_sync(iocb, ret);
> if (o_direct)
> blk_finish_plug(&plug);
>
> diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
> index 80dd44d..3fafeca 100644
> --- a/fs/gfs2/file.c
> +++ b/fs/gfs2/file.c
> @@ -895,8 +895,13 @@ retry:
> gfs2_quota_unlock(ip);
> }
>
> - if (error == 0)
> - error = generic_write_sync(file, pos, count);
> + if (error)
> + goto out_unlock;
> +
> + if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host)) {
> + error = vfs_fsync_range(file, pos, pos + count - 1,
> + (file->f_flags & __O_SYNC) ? 0 : 1);
> + }
> goto out_unlock;
>
> out_trans_fail:
> diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
> index 643faa4..4f3d664 100644
> --- a/fs/ntfs/file.c
> +++ b/fs/ntfs/file.c
> @@ -2127,12 +2127,8 @@ static ssize_t ntfs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
> mutex_lock(&inode->i_mutex);
> ret = ntfs_file_aio_write_nolock(iocb, iov, nr_segs, &iocb->ki_pos);
> mutex_unlock(&inode->i_mutex);
> - if (ret > 0) {
> - int err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> - return ret;
> +
> + return generic_write_sync(iocb, ret);
> }
>
> /**
> diff --git a/fs/udf/file.c b/fs/udf/file.c
> index bb15771..1cdabd0 100644
> --- a/fs/udf/file.c
> +++ b/fs/udf/file.c
> @@ -155,16 +155,9 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> retval = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (retval > 0) {
> - ssize_t err;
> -
> + if (retval > 0)
> mark_inode_dirty(inode);
> - err = generic_write_sync(file, iocb->ki_pos - retval, retval);
> - if (err < 0)
> - retval = err;
> - }
> -
> - return retval;
> + return generic_write_sync(iocb, retval);
> }
>
> long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index 0655915..a8cab66 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -792,14 +792,8 @@ xfs_file_write_iter(
> ret = xfs_file_buffered_aio_write(iocb, from);
>
> if (ret > 0) {
> - ssize_t err;
> -
> XFS_STATS_ADD(xs_write_bytes, ret);
> -
> - /* Handle various SYNC-type writes */
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> + ret = generic_write_sync(iocb, ret);
> }
> return ret;
> }
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index eaebd99..7d0e116 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -2242,13 +2242,7 @@ extern int filemap_fdatawrite_range(struct address_space *mapping,
> extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end,
> int datasync);
> extern int vfs_fsync(struct file *file, int datasync);
> -static inline int generic_write_sync(struct file *file, loff_t pos, loff_t count)
> -{
> - if (!(file->f_flags & O_DSYNC) && !IS_SYNC(file->f_mapping->host))
> - return 0;
> - return vfs_fsync_range(file, pos, pos + count - 1,
> - (file->f_flags & __O_SYNC) ? 0 : 1);
> -}
> +extern int generic_write_sync(struct kiocb *iocb, loff_t count);
> extern void emergency_sync(void);
> extern void emergency_remount(void);
> #ifdef CONFIG_BLOCK
> diff --git a/mm/filemap.c b/mm/filemap.c
> index 09d3af3..6107058 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -2664,6 +2664,24 @@ out:
> }
> EXPORT_SYMBOL(__generic_file_write_iter);
>
> +int generic_write_sync(struct kiocb *iocb, loff_t count)
> +{
> + struct file *file = iocb->ki_filp;
> +
> + if (count > 0 &&
> + ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host))) {
> + bool fdatasync = !(file->f_flags & __O_SYNC);
> + ssize_t ret = 0;
> +
> + ret = vfs_fsync_range(file, iocb->ki_pos - count,
> + iocb->ki_pos - 1, fdatasync);
> + if (ret < 0)
> + return ret;
> + }
> + return count;
> +}
> +EXPORT_SYMBOL(generic_write_sync);
> +
> /**
> * generic_file_write_iter - write data to a file
> * @iocb: IO state structure
> @@ -2675,22 +2693,14 @@ EXPORT_SYMBOL(__generic_file_write_iter);
> */
> ssize_t generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> {
> - struct file *file = iocb->ki_filp;
> - struct inode *inode = file->f_mapping->host;
> + struct inode *inode = iocb->ki_filp->f_mapping->host;
> ssize_t ret;
>
> mutex_lock(&inode->i_mutex);
> ret = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (ret > 0) {
> - ssize_t err;
> -
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> - return ret;
> + return generic_write_sync(iocb, ret);
> }
> EXPORT_SYMBOL(generic_file_write_iter);
>
--
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^ permalink raw reply
* Re: [Linux-NTFS-Dev] [PATCH v5 6/7] fs: pass iocb to generic_write_sync
From: Anton Altaparmakov @ 2014-11-06 10:52 UTC (permalink / raw)
To: Milosz Tanski
Cc: Linux Kernel Mailing List, linux-arch, linux-aio, Volker Lendecke,
Theodore Ts'o, linux-xfs, linux-cifs, linux-ntfs-dev,
linux-api, Christoph Hellwig, Tejun Heo, Jeff Moyer,
cluster-devel, Mel Gorman, linux-fsdevel, Michael Kerrisk,
linux-ext4, Christoph Hellwig, linux-btrfs, Al Viro
In-Reply-To: <5d53ede333de7cade713190e2b93e2dbadefa260.1415220890.git.milosz@adfin.com>
Hi,
> On 5 Nov 2014, at 23:14, Milosz Tanski <milosz@adfin.com> wrote:
>
> From: Christoph Hellwig <hch@lst.de>
>
> Clean up the generic_write_sync by just passing an iocb and a bytes
> written / negative errno argument. In addition to simplifying the
> callers this also prepares for passing a per-operation O_DSYNC
> flag. Two callers didn't quite fit that scheme:
>
> - dio_complete didn't both to update ki_pos as we don't need it
> on a iocb that is about to be freed, so we had to add it. Additionally
> it also synced out written data in the error case, which has been
> changed to operate like the other callers.
> - gfs2 also used generic_write_sync to implement a crude version
> of fallocate. It has been switched to use an open coded variant
> instead.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> fs/block_dev.c | 8 +-------
> fs/btrfs/file.c | 7 ++-----
> fs/cifs/file.c | 8 +-------
> fs/direct-io.c | 8 ++------
> fs/ext4/file.c | 8 +-------
> fs/gfs2/file.c | 9 +++++++--
> fs/ntfs/file.c | 8 ++------
> fs/udf/file.c | 11 ++---------
> fs/xfs/xfs_file.c | 8 +-------
> include/linux/fs.h | 8 +-------
> mm/filemap.c | 30 ++++++++++++++++++++----------
> 11 files changed, 40 insertions(+), 73 deletions(-)
>
> diff --git a/fs/block_dev.c b/fs/block_dev.c
> index cc9d411..c529b1c 100644
> --- a/fs/block_dev.c
> +++ b/fs/block_dev.c
> @@ -1568,18 +1568,12 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
> */
> ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
> {
> - struct file *file = iocb->ki_filp;
> struct blk_plug plug;
> ssize_t ret;
>
> blk_start_plug(&plug);
> ret = __generic_file_write_iter(iocb, from);
> - if (ret > 0) {
> - ssize_t err;
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> + ret = generic_write_sync(iocb, ret);
> blk_finish_plug(&plug);
> return ret;
> }
> diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
> index a18ceab..4f4a6f7 100644
> --- a/fs/btrfs/file.c
> +++ b/fs/btrfs/file.c
> @@ -1820,11 +1820,8 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
> */
> BTRFS_I(inode)->last_trans = root->fs_info->generation + 1;
> BTRFS_I(inode)->last_sub_trans = root->log_transid;
> - if (num_written > 0) {
> - err = generic_write_sync(file, pos, num_written);
> - if (err < 0)
> - num_written = err;
> - }
> +
> + num_written = generic_write_sync(iocb, num_written);
>
> if (sync)
> atomic_dec(&BTRFS_I(inode)->sync_writers);
> diff --git a/fs/cifs/file.c b/fs/cifs/file.c
> index c485afa..32359de 100644
> --- a/fs/cifs/file.c
> +++ b/fs/cifs/file.c
> @@ -2706,13 +2706,7 @@ cifs_writev(struct kiocb *iocb, struct iov_iter *from)
> rc = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (rc > 0) {
> - ssize_t err;
> -
> - err = generic_write_sync(file, iocb->ki_pos - rc, rc);
> - if (err < 0)
> - rc = err;
> - }
> + rc = generic_write_sync(iocb, rc);
> } else {
> mutex_unlock(&inode->i_mutex);
> }
> diff --git a/fs/direct-io.c b/fs/direct-io.c
> index e181b6b..b72ac83 100644
> --- a/fs/direct-io.c
> +++ b/fs/direct-io.c
> @@ -257,12 +257,8 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret,
> inode_dio_done(dio->inode);
> if (is_async) {
> if (dio->rw & WRITE) {
> - int err;
> -
> - err = generic_write_sync(dio->iocb->ki_filp, offset,
> - transferred);
> - if (err < 0 && ret > 0)
> - ret = err;
> + dio->iocb->ki_pos = offset + transferred;
> + ret = generic_write_sync(dio->iocb, ret);
> }
>
> aio_complete(dio->iocb, ret, 0);
> diff --git a/fs/ext4/file.c b/fs/ext4/file.c
> index aca7b24..79b000c 100644
> --- a/fs/ext4/file.c
> +++ b/fs/ext4/file.c
> @@ -175,13 +175,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> ret = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (ret > 0) {
> - ssize_t err;
> -
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> + ret = generic_write_sync(iocb, ret);
> if (o_direct)
> blk_finish_plug(&plug);
>
> diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
> index 80dd44d..3fafeca 100644
> --- a/fs/gfs2/file.c
> +++ b/fs/gfs2/file.c
> @@ -895,8 +895,13 @@ retry:
> gfs2_quota_unlock(ip);
> }
>
> - if (error == 0)
> - error = generic_write_sync(file, pos, count);
> + if (error)
> + goto out_unlock;
> +
> + if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host)) {
> + error = vfs_fsync_range(file, pos, pos + count - 1,
> + (file->f_flags & __O_SYNC) ? 0 : 1);
> + }
> goto out_unlock;
>
> out_trans_fail:
> diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
> index 643faa4..4f3d664 100644
> --- a/fs/ntfs/file.c
> +++ b/fs/ntfs/file.c
> @@ -2127,12 +2127,8 @@ static ssize_t ntfs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
> mutex_lock(&inode->i_mutex);
> ret = ntfs_file_aio_write_nolock(iocb, iov, nr_segs, &iocb->ki_pos);
> mutex_unlock(&inode->i_mutex);
> - if (ret > 0) {
> - int err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> - return ret;
> +
> + return generic_write_sync(iocb, ret);
> }
>
> /**
> diff --git a/fs/udf/file.c b/fs/udf/file.c
> index bb15771..1cdabd0 100644
> --- a/fs/udf/file.c
> +++ b/fs/udf/file.c
> @@ -155,16 +155,9 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> retval = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (retval > 0) {
> - ssize_t err;
> -
> + if (retval > 0)
> mark_inode_dirty(inode);
> - err = generic_write_sync(file, iocb->ki_pos - retval, retval);
> - if (err < 0)
> - retval = err;
> - }
> -
> - return retval;
> + return generic_write_sync(iocb, retval);
> }
>
> long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index 0655915..a8cab66 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -792,14 +792,8 @@ xfs_file_write_iter(
> ret = xfs_file_buffered_aio_write(iocb, from);
>
> if (ret > 0) {
> - ssize_t err;
> -
> XFS_STATS_ADD(xs_write_bytes, ret);
> -
> - /* Handle various SYNC-type writes */
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> + ret = generic_write_sync(iocb, ret);
> }
> return ret;
> }
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index eaebd99..7d0e116 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -2242,13 +2242,7 @@ extern int filemap_fdatawrite_range(struct address_space *mapping,
> extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end,
> int datasync);
> extern int vfs_fsync(struct file *file, int datasync);
> -static inline int generic_write_sync(struct file *file, loff_t pos, loff_t count)
> -{
> - if (!(file->f_flags & O_DSYNC) && !IS_SYNC(file->f_mapping->host))
> - return 0;
> - return vfs_fsync_range(file, pos, pos + count - 1,
> - (file->f_flags & __O_SYNC) ? 0 : 1);
> -}
> +extern int generic_write_sync(struct kiocb *iocb, loff_t count);
> extern void emergency_sync(void);
> extern void emergency_remount(void);
> #ifdef CONFIG_BLOCK
> diff --git a/mm/filemap.c b/mm/filemap.c
> index 09d3af3..6107058 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -2664,6 +2664,24 @@ out:
> }
> EXPORT_SYMBOL(__generic_file_write_iter);
>
> +int generic_write_sync(struct kiocb *iocb, loff_t count)
> +{
> + struct file *file = iocb->ki_filp;
> +
> + if (count > 0 &&
> + ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host))) {
> + bool fdatasync = !(file->f_flags & __O_SYNC);
> + ssize_t ret = 0;
That "= 0" is pointless. "ret" is overwritten unconditionally on the following line...
Other than that the NTFS bits are:
Acked-by: Anton Altaparmakov <anton@tuxera.com>
Best regards,
Anton
> +
> + ret = vfs_fsync_range(file, iocb->ki_pos - count,
> + iocb->ki_pos - 1, fdatasync);
> + if (ret < 0)
> + return ret;
> + }
> + return count;
> +}
> +EXPORT_SYMBOL(generic_write_sync);
> +
> /**
> * generic_file_write_iter - write data to a file
> * @iocb: IO state structure
> @@ -2675,22 +2693,14 @@ EXPORT_SYMBOL(__generic_file_write_iter);
> */
> ssize_t generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> {
> - struct file *file = iocb->ki_filp;
> - struct inode *inode = file->f_mapping->host;
> + struct inode *inode = iocb->ki_filp->f_mapping->host;
> ssize_t ret;
>
> mutex_lock(&inode->i_mutex);
> ret = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (ret > 0) {
> - ssize_t err;
> -
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> - return ret;
> + return generic_write_sync(iocb, ret);
> }
> EXPORT_SYMBOL(generic_file_write_iter);
--
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
University of Cambridge Information Services, Roger Needham Building
7 JJ Thomson Avenue, Cambridge, CB3 0RB, UK
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^ permalink raw reply
* Re: [PATCH v5 6/7] fs: pass iocb to generic_write_sync
From: Jan Kara @ 2014-11-06 12:04 UTC (permalink / raw)
To: Milosz Tanski
Cc: linux-kernel, Christoph Hellwig, Christoph Hellwig, linux-fsdevel,
linux-aio, Mel Gorman, Volker Lendecke, Tejun Heo, Jeff Moyer,
Theodore Ts'o, Al Viro, linux-api, Michael Kerrisk,
linux-arch, linux-btrfs, linux-cifs, linux-ext4, linux-ntfs-dev,
linux-xfs, cluster-devel
In-Reply-To: <5d53ede333de7cade713190e2b93e2dbadefa260.1415220890.git.milosz@adfin.com>
On Wed 05-11-14 16:14:52, Milosz Tanski wrote:
> From: Christoph Hellwig <hch@lst.de>
>
> Clean up the generic_write_sync by just passing an iocb and a bytes
> written / negative errno argument. In addition to simplifying the
> callers this also prepares for passing a per-operation O_DSYNC
> flag. Two callers didn't quite fit that scheme:
>
> - dio_complete didn't both to update ki_pos as we don't need it
> on a iocb that is about to be freed, so we had to add it. Additionally
> it also synced out written data in the error case, which has been
> changed to operate like the other callers.
> - gfs2 also used generic_write_sync to implement a crude version
> of fallocate. It has been switched to use an open coded variant
> instead.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Looks good. You can add:
Reviewed-by: Jan Kara <jack@suse.cz>
Honza
> ---
> fs/block_dev.c | 8 +-------
> fs/btrfs/file.c | 7 ++-----
> fs/cifs/file.c | 8 +-------
> fs/direct-io.c | 8 ++------
> fs/ext4/file.c | 8 +-------
> fs/gfs2/file.c | 9 +++++++--
> fs/ntfs/file.c | 8 ++------
> fs/udf/file.c | 11 ++---------
> fs/xfs/xfs_file.c | 8 +-------
> include/linux/fs.h | 8 +-------
> mm/filemap.c | 30 ++++++++++++++++++++----------
> 11 files changed, 40 insertions(+), 73 deletions(-)
>
> diff --git a/fs/block_dev.c b/fs/block_dev.c
> index cc9d411..c529b1c 100644
> --- a/fs/block_dev.c
> +++ b/fs/block_dev.c
> @@ -1568,18 +1568,12 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
> */
> ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
> {
> - struct file *file = iocb->ki_filp;
> struct blk_plug plug;
> ssize_t ret;
>
> blk_start_plug(&plug);
> ret = __generic_file_write_iter(iocb, from);
> - if (ret > 0) {
> - ssize_t err;
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> + ret = generic_write_sync(iocb, ret);
> blk_finish_plug(&plug);
> return ret;
> }
> diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
> index a18ceab..4f4a6f7 100644
> --- a/fs/btrfs/file.c
> +++ b/fs/btrfs/file.c
> @@ -1820,11 +1820,8 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
> */
> BTRFS_I(inode)->last_trans = root->fs_info->generation + 1;
> BTRFS_I(inode)->last_sub_trans = root->log_transid;
> - if (num_written > 0) {
> - err = generic_write_sync(file, pos, num_written);
> - if (err < 0)
> - num_written = err;
> - }
> +
> + num_written = generic_write_sync(iocb, num_written);
>
> if (sync)
> atomic_dec(&BTRFS_I(inode)->sync_writers);
> diff --git a/fs/cifs/file.c b/fs/cifs/file.c
> index c485afa..32359de 100644
> --- a/fs/cifs/file.c
> +++ b/fs/cifs/file.c
> @@ -2706,13 +2706,7 @@ cifs_writev(struct kiocb *iocb, struct iov_iter *from)
> rc = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (rc > 0) {
> - ssize_t err;
> -
> - err = generic_write_sync(file, iocb->ki_pos - rc, rc);
> - if (err < 0)
> - rc = err;
> - }
> + rc = generic_write_sync(iocb, rc);
> } else {
> mutex_unlock(&inode->i_mutex);
> }
> diff --git a/fs/direct-io.c b/fs/direct-io.c
> index e181b6b..b72ac83 100644
> --- a/fs/direct-io.c
> +++ b/fs/direct-io.c
> @@ -257,12 +257,8 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret,
> inode_dio_done(dio->inode);
> if (is_async) {
> if (dio->rw & WRITE) {
> - int err;
> -
> - err = generic_write_sync(dio->iocb->ki_filp, offset,
> - transferred);
> - if (err < 0 && ret > 0)
> - ret = err;
> + dio->iocb->ki_pos = offset + transferred;
> + ret = generic_write_sync(dio->iocb, ret);
> }
>
> aio_complete(dio->iocb, ret, 0);
> diff --git a/fs/ext4/file.c b/fs/ext4/file.c
> index aca7b24..79b000c 100644
> --- a/fs/ext4/file.c
> +++ b/fs/ext4/file.c
> @@ -175,13 +175,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> ret = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (ret > 0) {
> - ssize_t err;
> -
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> + ret = generic_write_sync(iocb, ret);
> if (o_direct)
> blk_finish_plug(&plug);
>
> diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
> index 80dd44d..3fafeca 100644
> --- a/fs/gfs2/file.c
> +++ b/fs/gfs2/file.c
> @@ -895,8 +895,13 @@ retry:
> gfs2_quota_unlock(ip);
> }
>
> - if (error == 0)
> - error = generic_write_sync(file, pos, count);
> + if (error)
> + goto out_unlock;
> +
> + if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host)) {
> + error = vfs_fsync_range(file, pos, pos + count - 1,
> + (file->f_flags & __O_SYNC) ? 0 : 1);
> + }
> goto out_unlock;
>
> out_trans_fail:
> diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
> index 643faa4..4f3d664 100644
> --- a/fs/ntfs/file.c
> +++ b/fs/ntfs/file.c
> @@ -2127,12 +2127,8 @@ static ssize_t ntfs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
> mutex_lock(&inode->i_mutex);
> ret = ntfs_file_aio_write_nolock(iocb, iov, nr_segs, &iocb->ki_pos);
> mutex_unlock(&inode->i_mutex);
> - if (ret > 0) {
> - int err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> - return ret;
> +
> + return generic_write_sync(iocb, ret);
> }
>
> /**
> diff --git a/fs/udf/file.c b/fs/udf/file.c
> index bb15771..1cdabd0 100644
> --- a/fs/udf/file.c
> +++ b/fs/udf/file.c
> @@ -155,16 +155,9 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> retval = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (retval > 0) {
> - ssize_t err;
> -
> + if (retval > 0)
> mark_inode_dirty(inode);
> - err = generic_write_sync(file, iocb->ki_pos - retval, retval);
> - if (err < 0)
> - retval = err;
> - }
> -
> - return retval;
> + return generic_write_sync(iocb, retval);
> }
>
> long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index 0655915..a8cab66 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -792,14 +792,8 @@ xfs_file_write_iter(
> ret = xfs_file_buffered_aio_write(iocb, from);
>
> if (ret > 0) {
> - ssize_t err;
> -
> XFS_STATS_ADD(xs_write_bytes, ret);
> -
> - /* Handle various SYNC-type writes */
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> + ret = generic_write_sync(iocb, ret);
> }
> return ret;
> }
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index eaebd99..7d0e116 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -2242,13 +2242,7 @@ extern int filemap_fdatawrite_range(struct address_space *mapping,
> extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end,
> int datasync);
> extern int vfs_fsync(struct file *file, int datasync);
> -static inline int generic_write_sync(struct file *file, loff_t pos, loff_t count)
> -{
> - if (!(file->f_flags & O_DSYNC) && !IS_SYNC(file->f_mapping->host))
> - return 0;
> - return vfs_fsync_range(file, pos, pos + count - 1,
> - (file->f_flags & __O_SYNC) ? 0 : 1);
> -}
> +extern int generic_write_sync(struct kiocb *iocb, loff_t count);
> extern void emergency_sync(void);
> extern void emergency_remount(void);
> #ifdef CONFIG_BLOCK
> diff --git a/mm/filemap.c b/mm/filemap.c
> index 09d3af3..6107058 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -2664,6 +2664,24 @@ out:
> }
> EXPORT_SYMBOL(__generic_file_write_iter);
>
> +int generic_write_sync(struct kiocb *iocb, loff_t count)
> +{
> + struct file *file = iocb->ki_filp;
> +
> + if (count > 0 &&
> + ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host))) {
> + bool fdatasync = !(file->f_flags & __O_SYNC);
> + ssize_t ret = 0;
> +
> + ret = vfs_fsync_range(file, iocb->ki_pos - count,
> + iocb->ki_pos - 1, fdatasync);
> + if (ret < 0)
> + return ret;
> + }
> + return count;
> +}
> +EXPORT_SYMBOL(generic_write_sync);
> +
> /**
> * generic_file_write_iter - write data to a file
> * @iocb: IO state structure
> @@ -2675,22 +2693,14 @@ EXPORT_SYMBOL(__generic_file_write_iter);
> */
> ssize_t generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> {
> - struct file *file = iocb->ki_filp;
> - struct inode *inode = file->f_mapping->host;
> + struct inode *inode = iocb->ki_filp->f_mapping->host;
> ssize_t ret;
>
> mutex_lock(&inode->i_mutex);
> ret = __generic_file_write_iter(iocb, from);
> mutex_unlock(&inode->i_mutex);
>
> - if (ret > 0) {
> - ssize_t err;
> -
> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
> - if (err < 0)
> - ret = err;
> - }
> - return ret;
> + return generic_write_sync(iocb, ret);
> }
> EXPORT_SYMBOL(generic_file_write_iter);
>
> --
> 1.9.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
Jan Kara <jack@suse.cz>
SUSE Labs, CR
--
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^ permalink raw reply
* Re: [PATCH v8] kernel, add panic_on_warn
From: Prarit Bhargava @ 2014-11-06 13:10 UTC (permalink / raw)
To: David Rientjes
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA, Jonathan Corbet,
Andrew Morton, Rusty Russell, H. Peter Anvin, Andi Kleen,
Masami Hiramatsu, Fabian Frederick, vgoyal-H+wXaHxf7aLQT0dZR+AlfA,
isimatu.yasuaki-+CUm20s59erQFUHtdCDX3A,
jbaron-JqFfY2XvxFXQT0dZR+AlfA, linux-doc-u79uwXL29TY76Z2rM5mHXA,
kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-api-u79uwXL29TY76Z2rM5mHXA
In-Reply-To: <alpine.DEB.2.10.1411051357050.31575-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
On 11/05/2014 04:59 PM, David Rientjes wrote:
> On Wed, 5 Nov 2014, Prarit Bhargava wrote:
>
>> diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
>> index 6c0b9f2..bc4bd5a 100644
>> --- a/Documentation/kdump/kdump.txt
>> +++ b/Documentation/kdump/kdump.txt
>> @@ -471,6 +471,13 @@ format. Crash is available on Dave Anderson's site at the following URL:
>>
>> http://people.redhat.com/~anderson/
>>
>> +Trigger Kdump on WARN()
>> +=======================
>> +
>> +The kernel parameter, panic_on_warn, calls panic() in all WARN() paths. This
>> +will cause a kdump to occur at the panic() call. In cases where a user wants
>> +to specify this during runtime, /proc/sys/kernel/panic_on_warn can be set to 1
>> +to achieve the same behaviour.
>>
>> Contact
>> =======
>> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
>> index 4c81a86..ea5d57c 100644
>> --- a/Documentation/kernel-parameters.txt
>> +++ b/Documentation/kernel-parameters.txt
>> @@ -2509,6 +2509,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
>> timeout < 0: reboot immediately
>> Format: <timeout>
>>
>> + panic_on_warn panic() instead of WARN(). Useful to cause kdump
>> + on a WARN().
>> +
>> crash_kexec_post_notifiers
>> Run kdump after running panic-notifiers and dumping
>> kmsg. This only for the users who doubt kdump always
>> diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
>> index 57baff5..b5d0c85 100644
>> --- a/Documentation/sysctl/kernel.txt
>> +++ b/Documentation/sysctl/kernel.txt
>> @@ -54,8 +54,9 @@ show up in /proc/sys/kernel:
>> - overflowuid
>> - panic
>> - panic_on_oops
>> -- panic_on_unrecovered_nmi
>> - panic_on_stackoverflow
>> +- panic_on_unrecovered_nmi
>> +- panic_on_warn
>> - pid_max
>> - powersave-nap [ PPC only ]
>> - printk
>> @@ -527,19 +528,6 @@ the recommended setting is 60.
>>
>> ==============================================================
>>
>> -panic_on_unrecovered_nmi:
>> -
>> -The default Linux behaviour on an NMI of either memory or unknown is
>> -to continue operation. For many environments such as scientific
>> -computing it is preferable that the box is taken out and the error
>> -dealt with than an uncorrected parity/ECC error get propagated.
>> -
>> -A small number of systems do generate NMI's for bizarre random reasons
>> -such as power management so the default is off. That sysctl works like
>> -the existing panic controls already in that directory.
>> -
>> -==============================================================
>> -
>> panic_on_oops:
>>
>> Controls the kernel's behaviour when an oops or BUG is encountered.
>> @@ -563,6 +551,30 @@ This file shows up if CONFIG_DEBUG_STACKOVERFLOW is enabled.
>>
>> ==============================================================
>>
>> +panic_on_unrecovered_nmi:
>> +
>> +The default Linux behaviour on an NMI of either memory or unknown is
>> +to continue operation. For many environments such as scientific
>> +computing it is preferable that the box is taken out and the error
>> +dealt with than an uncorrected parity/ECC error get propagated.
>> +
>> +A small number of systems do generate NMI's for bizarre random reasons
>> +such as power management so the default is off. That sysctl works like
>> +the existing panic controls already in that directory.
>> +
>> +==============================================================
>> +
>> +panic_on_warn:
>> +
>> +Calls panic() in the WARN() path when set to 1. This is useful to avoid
>> +a kernel rebuild when attempting to kdump at the location of a WARN().
>> +
>> +0: only WARN(), default behaviour.
>> +
>> +1: call panic() after printing out WARN() location.
>> +
>> +==============================================================
>> +
>> perf_cpu_time_max_percent:
>>
>> Hints to the kernel how much CPU time it should be allowed to
>> diff --git a/include/linux/kernel.h b/include/linux/kernel.h
>> index 3d770f55..d60d31d 100644
>> --- a/include/linux/kernel.h
>> +++ b/include/linux/kernel.h
>> @@ -422,6 +422,7 @@ extern int panic_timeout;
>> extern int panic_on_oops;
>> extern int panic_on_unrecovered_nmi;
>> extern int panic_on_io_nmi;
>> +extern int panic_on_warn;
>> extern int sysctl_panic_on_stackoverflow;
>> /*
>> * Only to be used by arch init code. If the user over-wrote the default
>> diff --git a/include/uapi/linux/sysctl.h b/include/uapi/linux/sysctl.h
>> index 43aaba1..0956373 100644
>> --- a/include/uapi/linux/sysctl.h
>> +++ b/include/uapi/linux/sysctl.h
>> @@ -153,6 +153,7 @@ enum
>> KERN_MAX_LOCK_DEPTH=74, /* int: rtmutex's maximum lock depth */
>> KERN_NMI_WATCHDOG=75, /* int: enable/disable nmi watchdog */
>> KERN_PANIC_ON_NMI=76, /* int: whether we will panic on an unrecovered */
>> + KERN_PANIC_ON_WARN=77, /* int: call panic() in WARN() functions */
>> };
>>
>>
>> diff --git a/kernel/panic.c b/kernel/panic.c
>> index d09dc5c..c6a7723 100644
>> --- a/kernel/panic.c
>> +++ b/kernel/panic.c
>> @@ -33,6 +33,7 @@ static int pause_on_oops;
>> static int pause_on_oops_flag;
>> static DEFINE_SPINLOCK(pause_on_oops_lock);
>> static bool crash_kexec_post_notifiers;
>> +int panic_on_warn __read_mostly;
>>
>> int panic_timeout = CONFIG_PANIC_TIMEOUT;
>> EXPORT_SYMBOL_GPL(panic_timeout);
>> @@ -420,13 +421,23 @@ static void warn_slowpath_common(const char *file, int line, void *caller,
>> {
>> disable_trace_on_warning();
>>
>> - pr_warn("------------[ cut here ]------------\n");
>> + if (!panic_on_warn)
>> + pr_warn("------------[ cut here ]------------\n");
>
> Is this really necessary?
Yes IMO. The WARN() prints out the line and it looks "weird" when we're doing a
panic because the finishing "end" doesn't print out. I'm specifically
targetting this kernel option at end users and I think the way it looks matters.
>
>> pr_warn("WARNING: CPU: %d PID: %d at %s:%d %pS()\n",
>> raw_smp_processor_id(), current->pid, file, line, caller);
>>
>> if (args)
>> vprintk(args->fmt, args->args);
>>
>> + if (panic_on_warn) {
>> + /*
>> + * A flood of WARN()s may occur. Prevent further WARN()s
>> + * from panicking the system.
>> + */
>
> What synchronization is preventing this race and further WARN()s panicking
> the system?
Now that I re-read it, the flood comment is definitely misleading.
It should read "The panic path may lead to additional WARN()s. Prevent
additional WARN()s from panicking the system." I'll change that in the next
version.
Your question spurred me to write a simple module that did this on a 160-core
system:
static void warn_this_cpu(void *arg)
{
WARN(1, "cpu = %d\n", smp_processor_id());
}
static int init_dummy(void)
{
on_each_cpu(warn_this_cpu, NULL, 1);
return 0;
}
to see if I could hit any races in this code. While the WARN()s output overlap
each other I always see a single:
Kernel panic - not syncing: panic_on_warn set ...
line followed by the kdump.
Another issue: Are multiple WARN()s supposed to overlap output like that? Do we
want them to? AFAICT there is no way to distinguish the output from one WARN()
from another ...
P.
>
>> + panic_on_warn = 0;
>> + panic("panic_on_warn set ...\n");
>> + }
>> +
>> print_modules();
>> dump_stack();
>> print_oops_end_marker();
^ permalink raw reply
* [PATCH RESEND v3 0/4] power/mfd: Add max77693 charger driver
From: Krzysztof Kozlowski @ 2014-11-06 15:11 UTC (permalink / raw)
To: Sebastian Reichel, Dmitry Eremin-Solenikov, David Woodhouse,
Samuel Ortiz, Lee Jones, linux-kernel, linux-pm, devicetree,
linux-api
Cc: Krzysztof Kozlowski, linux-samsung-soc, Bartlomiej Zolnierkiewicz,
Tomasz Figa, Kyungmin Park, linux-arm-kernel, Marek Szyprowski
Hi,
I got ack from Sebastian [1] but only for charger driver patch. This
means that I still need an ack for documentation (bindings, sysfs)...
Changes since v2
================
1. Add ack from Sebastian Reichel (charger driver).
2. Drop patch "mfd: max77693: Map charger device to its own of_node"
(applied by Lee Jones).
Changes since v1
================
1. Add patch 2/5: mfd: max77693: Map charger device to its own of_node
(forgot to send it in v1)
2. Remove patches for DTS and configs. I'll send them later.
3. Add ack from Lee Jones (patch 3/5).
Description
===========
The patchset adds max77693 charger driver present on Trats2 board
(and Galaxy S III). The driver configures battery charger and exposes
power supply interface.
Driver is necessary to provide full charging stack on Trats2 device
(extcon, charger-manager etc.).
[1] https://lkml.org/lkml/2014/10/27/774
Best regards,
Krzysztof
Krzysztof Kozlowski (4):
devicetree: power/mfd: max77693: Document new bindings for charger
mfd: max77693: Add defines for MAX77693 charger driver
power: max77693: Add charger driver for Maxim 77693
Documentation: power: max77693-charger: Document exported sysfs entry
Documentation/ABI/testing/sysfs-class-power | 42 ++
Documentation/devicetree/bindings/mfd/max77693.txt | 45 ++
drivers/power/Kconfig | 6 +
drivers/power/Makefile | 1 +
drivers/power/max77693_charger.c | 763 +++++++++++++++++++++
include/linux/mfd/max77693-private.h | 108 +++
include/linux/mfd/max77693.h | 8 +
7 files changed, 973 insertions(+)
create mode 100644 drivers/power/max77693_charger.c
--
1.9.1
^ permalink raw reply
* [PATCH RESEND v3 1/4] devicetree: power/mfd: max77693: Document new bindings for charger
From: Krzysztof Kozlowski @ 2014-11-06 15:11 UTC (permalink / raw)
To: Sebastian Reichel, Dmitry Eremin-Solenikov, David Woodhouse,
Samuel Ortiz, Lee Jones, linux-kernel, linux-pm, devicetree,
linux-api
Cc: linux-arm-kernel, linux-samsung-soc, Kyungmin Park,
Marek Szyprowski, Bartlomiej Zolnierkiewicz, Tomasz Figa,
Krzysztof Kozlowski
In-Reply-To: <1415286720-6358-1-git-send-email-k.kozlowski@samsung.com>
Document new device tree bindings for Maxim 77693 charger driver.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
Documentation/devicetree/bindings/mfd/max77693.txt | 45 ++++++++++++++++++++++
1 file changed, 45 insertions(+)
diff --git a/Documentation/devicetree/bindings/mfd/max77693.txt b/Documentation/devicetree/bindings/mfd/max77693.txt
index 01e9f30fe678..38e64405e98d 100644
--- a/Documentation/devicetree/bindings/mfd/max77693.txt
+++ b/Documentation/devicetree/bindings/mfd/max77693.txt
@@ -41,6 +41,41 @@ Optional properties:
To get more informations, please refer to documentaion.
[*] refer Documentation/devicetree/bindings/pwm/pwm.txt
+- charger : Node configuring the charger driver.
+ If present, required properties:
+ - compatible : Must be "maxim,max77693-charger".
+
+ Optional properties (if not set, defaults will be used):
+ - maxim,constant-microvolt : Battery constant voltage in uV. The charger
+ will operate in fast charge constant current mode till battery voltage
+ reaches this level. Then the charger will switch to fast charge constant
+ voltage mode. Also vsys (system voltage) will be set to this value when
+ DC power is supplied but charger is not enabled.
+ Valid values: 3650000 - 4400000, step by 25000 (rounded down)
+ Default: 4200000
+
+ - maxim,min-system-microvolt : Minimal system voltage in uV.
+ Valid values: 3000000 - 3700000, step by 100000 (rounded down)
+ Default: 3600000
+
+ - maxim,thermal-regulation-celsius : Temperature in Celsius for entering
+ high temperature charging mode. If die temperature exceeds this value
+ the charging current will be reduced by 105 mA/Celsius.
+ Valid values: 70, 85, 100, 115
+ Default: 100
+
+ - maxim,battery-overcurrent-microamp : Overcurrent protection threshold
+ in uA (current from battery to system).
+ Valid values: 2000000 - 3500000, step by 250000 (rounded down)
+ Default: 3500000
+
+ - maxim,charge-input-threshold-microvolt : Threshold voltage in uV for
+ triggering input voltage regulation loop. If input voltage decreases
+ below this value, the input current will be reduced to reach the
+ threshold voltage.
+ Valid values: 4300000, 4700000, 4800000, 4900000
+ Default: 4300000
+
Example:
max77693@66 {
compatible = "maxim,max77693";
@@ -73,4 +108,14 @@ Example:
pwms = <&pwm 0 40000 0>;
pwm-names = "haptic";
};
+
+ charger {
+ compatible = "maxim,max77693-charger";
+
+ maxim,constant-microvolt = <4200000>;
+ maxim,min-system-microvolt = <3600000>;
+ maxim,thermal-regulation-celsius = <75>;
+ maxim,battery-overcurrent-microamp = <3000000>;
+ maxim,charge-input-threshold-microvolt = <4300000>;
+ };
};
--
1.9.1
^ permalink raw reply related
* [PATCH RESEND v3 2/4] mfd: max77693: Add defines for MAX77693 charger driver
From: Krzysztof Kozlowski @ 2014-11-06 15:11 UTC (permalink / raw)
To: Sebastian Reichel, Dmitry Eremin-Solenikov, David Woodhouse,
Samuel Ortiz, Lee Jones, linux-kernel, linux-pm, devicetree,
linux-api
Cc: linux-arm-kernel, linux-samsung-soc, Kyungmin Park,
Marek Szyprowski, Bartlomiej Zolnierkiewicz, Tomasz Figa,
Krzysztof Kozlowski
In-Reply-To: <1415286720-6358-1-git-send-email-k.kozlowski@samsung.com>
Prepare for adding support for Maxim 77693 charger by adding necessary
new defines and structure for device tree parsed data.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
---
include/linux/mfd/max77693-private.h | 108 +++++++++++++++++++++++++++++++++++
include/linux/mfd/max77693.h | 8 +++
2 files changed, 116 insertions(+)
diff --git a/include/linux/mfd/max77693-private.h b/include/linux/mfd/max77693-private.h
index 6392a1565452..7952a12ad64b 100644
--- a/include/linux/mfd/max77693-private.h
+++ b/include/linux/mfd/max77693-private.h
@@ -143,10 +143,118 @@ enum max77693_pmic_reg {
#define FLASH_INT_FLED1_SHORT BIT(3)
#define FLASH_INT_OVER_CURRENT BIT(4)
+/* Fast charge timer in in hours */
+#define DEFAULT_FAST_CHARGE_TIMER 4
+/* microamps */
+#define DEFAULT_TOP_OFF_THRESHOLD_CURRENT 150000
+/* minutes */
+#define DEFAULT_TOP_OFF_TIMER 30
+/* microvolts */
+#define DEFAULT_CONSTANT_VOLT 4200000
+/* microvolts */
+#define DEFAULT_MIN_SYSTEM_VOLT 3600000
+/* celsius */
+#define DEFAULT_THERMAL_REGULATION_TEMP 100
+/* microamps */
+#define DEFAULT_BATTERY_OVERCURRENT 3500000
+/* microvolts */
+#define DEFAULT_CHARGER_INPUT_THRESHOLD_VOLT 4300000
+
+/* MAX77693_CHG_REG_CHG_INT_OK register */
+#define CHG_INT_OK_BYP_SHIFT 0
+#define CHG_INT_OK_BAT_SHIFT 3
+#define CHG_INT_OK_CHG_SHIFT 4
+#define CHG_INT_OK_CHGIN_SHIFT 6
+#define CHG_INT_OK_DETBAT_SHIFT 7
+#define CHG_INT_OK_BYP_MASK BIT(CHG_INT_OK_BYP_SHIFT)
+#define CHG_INT_OK_BAT_MASK BIT(CHG_INT_OK_BAT_SHIFT)
+#define CHG_INT_OK_CHG_MASK BIT(CHG_INT_OK_CHG_SHIFT)
+#define CHG_INT_OK_CHGIN_MASK BIT(CHG_INT_OK_CHGIN_SHIFT)
+#define CHG_INT_OK_DETBAT_MASK BIT(CHG_INT_OK_DETBAT_SHIFT)
+
+/* MAX77693_CHG_REG_CHG_DETAILS_00 register */
+#define CHG_DETAILS_00_CHGIN_SHIFT 5
+#define CHG_DETAILS_00_CHGIN_MASK (0x3 << CHG_DETAILS_00_CHGIN_SHIFT)
+
+/* MAX77693_CHG_REG_CHG_DETAILS_01 register */
+#define CHG_DETAILS_01_CHG_SHIFT 0
+#define CHG_DETAILS_01_BAT_SHIFT 4
+#define CHG_DETAILS_01_TREG_SHIFT 7
+#define CHG_DETAILS_01_CHG_MASK (0xf << CHG_DETAILS_01_CHG_SHIFT)
+#define CHG_DETAILS_01_BAT_MASK (0x7 << CHG_DETAILS_01_BAT_SHIFT)
+#define CHG_DETAILS_01_TREG_MASK BIT(7)
+
+/* MAX77693_CHG_REG_CHG_DETAILS_01/CHG field */
+enum max77693_charger_charging_state {
+ MAX77693_CHARGING_PREQUALIFICATION = 0x0,
+ MAX77693_CHARGING_FAST_CONST_CURRENT,
+ MAX77693_CHARGING_FAST_CONST_VOLTAGE,
+ MAX77693_CHARGING_TOP_OFF,
+ MAX77693_CHARGING_DONE,
+ MAX77693_CHARGING_HIGH_TEMP,
+ MAX77693_CHARGING_TIMER_EXPIRED,
+ MAX77693_CHARGING_THERMISTOR_SUSPEND,
+ MAX77693_CHARGING_OFF,
+ MAX77693_CHARGING_RESERVED,
+ MAX77693_CHARGING_OVER_TEMP,
+ MAX77693_CHARGING_WATCHDOG_EXPIRED,
+};
+
+/* MAX77693_CHG_REG_CHG_DETAILS_01/BAT field */
+enum max77693_charger_battery_state {
+ MAX77693_BATTERY_NOBAT = 0x0,
+ /* Dead-battery or low-battery prequalification */
+ MAX77693_BATTERY_PREQUALIFICATION,
+ MAX77693_BATTERY_TIMER_EXPIRED,
+ MAX77693_BATTERY_GOOD,
+ MAX77693_BATTERY_LOWVOLTAGE,
+ MAX77693_BATTERY_OVERVOLTAGE,
+ MAX77693_BATTERY_OVERCURRENT,
+ MAX77693_BATTERY_RESERVED,
+};
+
+/* MAX77693_CHG_REG_CHG_DETAILS_02 register */
+#define CHG_DETAILS_02_BYP_SHIFT 0
+#define CHG_DETAILS_02_BYP_MASK (0xf << CHG_DETAILS_02_BYP_SHIFT)
+
/* MAX77693 CHG_CNFG_00 register */
#define CHG_CNFG_00_CHG_MASK 0x1
#define CHG_CNFG_00_BUCK_MASK 0x4
+/* MAX77693_CHG_REG_CHG_CNFG_01 register */
+#define CHG_CNFG_01_FCHGTIME_SHIFT 0
+#define CHG_CNFG_01_CHGRSTRT_SHIFT 4
+#define CHG_CNFG_01_PQEN_SHIFT 7
+#define CHG_CNFG_01_FCHGTIME_MASK (0x7 << CHG_CNFG_01_FCHGTIME_SHIFT)
+#define CHG_CNFG_01_CHGRSTRT_MASK (0x3 << CHG_CNFG_01_CHGRSTRT_SHIFT)
+#define CHG_CNFG_01_PQEN_MAKS BIT(CHG_CNFG_01_PQEN_SHIFT)
+
+/* MAX77693_CHG_REG_CHG_CNFG_03 register */
+#define CHG_CNFG_03_TOITH_SHIFT 0
+#define CHG_CNFG_03_TOTIME_SHIFT 3
+#define CHG_CNFG_03_TOITH_MASK (0x7 << CHG_CNFG_03_TOITH_SHIFT)
+#define CHG_CNFG_03_TOTIME_MASK (0x7 << CHG_CNFG_03_TOTIME_SHIFT)
+
+/* MAX77693_CHG_REG_CHG_CNFG_04 register */
+#define CHG_CNFG_04_CHGCVPRM_SHIFT 0
+#define CHG_CNFG_04_MINVSYS_SHIFT 5
+#define CHG_CNFG_04_CHGCVPRM_MASK (0x1f << CHG_CNFG_04_CHGCVPRM_SHIFT)
+#define CHG_CNFG_04_MINVSYS_MASK (0x7 << CHG_CNFG_04_MINVSYS_SHIFT)
+
+/* MAX77693_CHG_REG_CHG_CNFG_06 register */
+#define CHG_CNFG_06_CHGPROT_SHIFT 2
+#define CHG_CNFG_06_CHGPROT_MASK (0x3 << CHG_CNFG_06_CHGPROT_SHIFT)
+
+/* MAX77693_CHG_REG_CHG_CNFG_07 register */
+#define CHG_CNFG_07_REGTEMP_SHIFT 5
+#define CHG_CNFG_07_REGTEMP_MASK (0x3 << CHG_CNFG_07_REGTEMP_SHIFT)
+
+/* MAX77693_CHG_REG_CHG_CNFG_12 register */
+#define CHG_CNFG_12_B2SOVRC_SHIFT 0
+#define CHG_CNFG_12_VCHGINREG_SHIFT 3
+#define CHG_CNFG_12_B2SOVRC_MASK (0x7 << CHG_CNFG_12_B2SOVRC_SHIFT)
+#define CHG_CNFG_12_VCHGINREG_MASK (0x3 << CHG_CNFG_12_VCHGINREG_SHIFT)
+
/* MAX77693 CHG_CNFG_09 Register */
#define CHG_CNFG_09_CHGIN_ILIM_MASK 0x7F
diff --git a/include/linux/mfd/max77693.h b/include/linux/mfd/max77693.h
index f0b6585cd874..88ef24b28294 100644
--- a/include/linux/mfd/max77693.h
+++ b/include/linux/mfd/max77693.h
@@ -63,6 +63,14 @@ struct max77693_muic_platform_data {
int path_uart;
};
+struct max77693_charger_platform_data {
+ u32 constant_volt;
+ u32 min_system_volt;
+ u32 thermal_regulation_temp;
+ u32 batttery_overcurrent;
+ u32 charge_input_threshold_volt;
+};
+
/* MAX77693 led flash */
/* triggers */
--
1.9.1
^ permalink raw reply related
* [PATCH RESEND v3 3/4] power: max77693: Add charger driver for Maxim 77693
From: Krzysztof Kozlowski @ 2014-11-06 15:11 UTC (permalink / raw)
To: Sebastian Reichel, Dmitry Eremin-Solenikov, David Woodhouse,
Samuel Ortiz, Lee Jones, linux-kernel, linux-pm, devicetree,
linux-api
Cc: linux-arm-kernel, linux-samsung-soc, Kyungmin Park,
Marek Szyprowski, Bartlomiej Zolnierkiewicz, Tomasz Figa,
Krzysztof Kozlowski
In-Reply-To: <1415286720-6358-1-git-send-email-k.kozlowski@samsung.com>
Add new driver for Maxim 77693 switch-mode charger (part of max77693
MFD driver) providing power supply class information to userspace.
The charger has +20V tolerant input. Current input can be set from 0 to
2.58 A. The charger can deliver up to 2.1 A to the battery or 3.5 A to
the system (when supplying additional current from battery to system).
The driver is configured through DTS (battery and system related
settings) and sysfs entries (timers and top-off charging threshold).
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-By: Sebastian Reichel <sre@kernel.org>
---
drivers/power/Kconfig | 6 +
drivers/power/Makefile | 1 +
drivers/power/max77693_charger.c | 763 +++++++++++++++++++++++++++++++++++++++
3 files changed, 770 insertions(+)
create mode 100644 drivers/power/max77693_charger.c
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 0108c2af005b..77e6cd7bb801 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -332,6 +332,12 @@ config CHARGER_MAX14577
Say Y to enable support for the battery charger control sysfs and
platform data of MAX14577/77836 MUICs.
+config CHARGER_MAX77693
+ tristate "Maxim MAX77693 battery charger driver"
+ depends on MFD_MAX77693
+ help
+ Say Y to enable support for the Maxim MAX77693 battery charger.
+
config CHARGER_MAX8997
tristate "Maxim MAX8997/MAX8966 PMIC battery charger driver"
depends on MFD_MAX8997 && REGULATOR_MAX8997
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index dfa894273926..2d7ad66cc7d6 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -50,6 +50,7 @@ obj-$(CONFIG_CHARGER_LP8788) += lp8788-charger.o
obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o
obj-$(CONFIG_CHARGER_MANAGER) += charger-manager.o
obj-$(CONFIG_CHARGER_MAX14577) += max14577_charger.o
+obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
diff --git a/drivers/power/max77693_charger.c b/drivers/power/max77693_charger.c
new file mode 100644
index 000000000000..dfdbcc2f0795
--- /dev/null
+++ b/drivers/power/max77693_charger.c
@@ -0,0 +1,763 @@
+/*
+ * max77693_charger.c - Battery charger driver for the Maxim 77693
+ *
+ * Copyright (C) 2014 Samsung Electronics
+ * Krzysztof Kozlowski <k.kozlowski@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/mfd/max77693.h>
+#include <linux/mfd/max77693-private.h>
+
+static const char *max77693_charger_name = "max77693-charger";
+static const char *max77693_charger_model = "MAX77693";
+static const char *max77693_charger_manufacturer = "Maxim Integrated";
+
+struct max77693_charger {
+ struct device *dev;
+ struct max77693_dev *max77693;
+ struct power_supply charger;
+
+ struct max77693_charger_platform_data *pdata;
+};
+
+static int max77693_get_charger_state(struct regmap *regmap)
+{
+ int state;
+ unsigned int data;
+
+ if (regmap_read(regmap, MAX77693_CHG_REG_CHG_DETAILS_01, &data) < 0)
+ return POWER_SUPPLY_STATUS_UNKNOWN;
+
+ data &= CHG_DETAILS_01_CHG_MASK;
+ data >>= CHG_DETAILS_01_CHG_SHIFT;
+
+ switch (data) {
+ case MAX77693_CHARGING_PREQUALIFICATION:
+ case MAX77693_CHARGING_FAST_CONST_CURRENT:
+ case MAX77693_CHARGING_FAST_CONST_VOLTAGE:
+ case MAX77693_CHARGING_TOP_OFF:
+ /* In high temp the charging current is reduced, but still charging */
+ case MAX77693_CHARGING_HIGH_TEMP:
+ state = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ case MAX77693_CHARGING_DONE:
+ state = POWER_SUPPLY_STATUS_FULL;
+ break;
+ case MAX77693_CHARGING_TIMER_EXPIRED:
+ case MAX77693_CHARGING_THERMISTOR_SUSPEND:
+ state = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ case MAX77693_CHARGING_OFF:
+ case MAX77693_CHARGING_OVER_TEMP:
+ case MAX77693_CHARGING_WATCHDOG_EXPIRED:
+ state = POWER_SUPPLY_STATUS_DISCHARGING;
+ break;
+ case MAX77693_CHARGING_RESERVED:
+ default:
+ state = POWER_SUPPLY_STATUS_UNKNOWN;
+ }
+
+ return state;
+}
+
+static int max77693_get_charge_type(struct regmap *regmap)
+{
+ int state;
+ unsigned int data;
+
+ if (regmap_read(regmap, MAX77693_CHG_REG_CHG_DETAILS_01, &data) < 0)
+ return POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+
+ data &= CHG_DETAILS_01_CHG_MASK;
+ data >>= CHG_DETAILS_01_CHG_SHIFT;
+
+ switch (data) {
+ case MAX77693_CHARGING_PREQUALIFICATION:
+ /*
+ * Top-off: trickle or fast? In top-off the current varies between
+ * 100 and 250 mA. It is higher than prequalification current.
+ */
+ case MAX77693_CHARGING_TOP_OFF:
+ state = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ break;
+ case MAX77693_CHARGING_FAST_CONST_CURRENT:
+ case MAX77693_CHARGING_FAST_CONST_VOLTAGE:
+ /* In high temp the charging current is reduced, but still charging */
+ case MAX77693_CHARGING_HIGH_TEMP:
+ state = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ break;
+ case MAX77693_CHARGING_DONE:
+ case MAX77693_CHARGING_TIMER_EXPIRED:
+ case MAX77693_CHARGING_THERMISTOR_SUSPEND:
+ case MAX77693_CHARGING_OFF:
+ case MAX77693_CHARGING_OVER_TEMP:
+ case MAX77693_CHARGING_WATCHDOG_EXPIRED:
+ state = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ break;
+ case MAX77693_CHARGING_RESERVED:
+ default:
+ state = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+ }
+
+ return state;
+}
+
+/*
+ * Supported health statuses:
+ * - POWER_SUPPLY_HEALTH_DEAD
+ * - POWER_SUPPLY_HEALTH_GOOD
+ * - POWER_SUPPLY_HEALTH_OVERVOLTAGE
+ * - POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE
+ * - POWER_SUPPLY_HEALTH_UNKNOWN
+ * - POWER_SUPPLY_HEALTH_UNSPEC_FAILURE
+ */
+static int max77693_get_battery_health(struct regmap *regmap)
+{
+ int state;
+ unsigned int data;
+
+ if (regmap_read(regmap, MAX77693_CHG_REG_CHG_DETAILS_01, &data) < 0)
+ return POWER_SUPPLY_HEALTH_UNKNOWN;
+
+ data &= CHG_DETAILS_01_BAT_MASK;
+ data >>= CHG_DETAILS_01_BAT_SHIFT;
+
+ switch (data) {
+ case MAX77693_BATTERY_NOBAT:
+ state = POWER_SUPPLY_HEALTH_DEAD;
+ break;
+ case MAX77693_BATTERY_PREQUALIFICATION:
+ case MAX77693_BATTERY_GOOD:
+ case MAX77693_BATTERY_LOWVOLTAGE:
+ state = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+ case MAX77693_BATTERY_TIMER_EXPIRED:
+ /*
+ * Took longer to charge than expected, charging suspended.
+ * Damaged battery?
+ */
+ state = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ break;
+ case MAX77693_BATTERY_OVERVOLTAGE:
+ state = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ break;
+ case MAX77693_BATTERY_OVERCURRENT:
+ state = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ break;
+ case MAX77693_BATTERY_RESERVED:
+ default:
+ state = POWER_SUPPLY_HEALTH_UNKNOWN;
+ break;
+ }
+
+ return state;
+}
+
+static int max77693_get_present(struct regmap *regmap)
+{
+ unsigned int data;
+
+ /*
+ * Read CHG_INT_OK register. High DETBAT bit here should be
+ * equal to value 0x0 in CHG_DETAILS_01/BAT field.
+ */
+ regmap_read(regmap, MAX77693_CHG_REG_CHG_INT_OK, &data);
+ if (data & CHG_INT_OK_DETBAT_MASK)
+ return 0;
+ return 1;
+}
+
+static int max77693_get_online(struct regmap *regmap)
+{
+ unsigned int data;
+
+ regmap_read(regmap, MAX77693_CHG_REG_CHG_INT_OK, &data);
+ if (data & CHG_INT_OK_CHGIN_MASK)
+ return 1;
+ return 0;
+}
+
+static enum power_supply_property max77693_charger_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+static int max77693_charger_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct max77693_charger *chg = container_of(psy,
+ struct max77693_charger,
+ charger);
+ struct regmap *regmap = chg->max77693->regmap;
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = max77693_get_charger_state(regmap);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ val->intval = max77693_get_charge_type(regmap);
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ val->intval = max77693_get_battery_health(regmap);
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = max77693_get_present(regmap);
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = max77693_get_online(regmap);
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = max77693_charger_model;
+ break;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = max77693_charger_manufacturer;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static ssize_t device_attr_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count,
+ int (*fn)(struct max77693_charger *, unsigned long))
+{
+ struct max77693_charger *chg = dev_get_drvdata(dev);
+ unsigned long val;
+ int ret;
+
+ ret = kstrtoul(buf, 10, &val);
+ if (ret)
+ return ret;
+
+ ret = fn(chg, val);
+ if (ret)
+ return ret;
+
+ return count;
+}
+
+static ssize_t fast_charge_timer_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct max77693_charger *chg = dev_get_drvdata(dev);
+ unsigned int data, val;
+ int ret;
+
+ ret = regmap_read(chg->max77693->regmap, MAX77693_CHG_REG_CHG_CNFG_01,
+ &data);
+ if (ret < 0)
+ return ret;
+
+ data &= CHG_CNFG_01_FCHGTIME_MASK;
+ data >>= CHG_CNFG_01_FCHGTIME_SHIFT;
+ switch (data) {
+ case 0x1 ... 0x7:
+ /* Starting from 4 hours, step by 2 hours */
+ val = 4 + (data - 1) * 2;
+ break;
+ case 0x0:
+ default:
+ val = 0;
+ break;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+}
+
+static int max77693_set_fast_charge_timer(struct max77693_charger *chg,
+ unsigned long hours)
+{
+ unsigned int data;
+
+ /*
+ * 0x00 - disable
+ * 0x01 - 4h
+ * 0x02 - 6h
+ * ...
+ * 0x07 - 16h
+ * Round down odd values.
+ */
+ switch (hours) {
+ case 4 ... 16:
+ data = (hours - 4) / 2 + 1;
+ break;
+ case 0:
+ /* Disable */
+ data = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+ data <<= CHG_CNFG_01_FCHGTIME_SHIFT;
+
+ return regmap_update_bits(chg->max77693->regmap,
+ MAX77693_CHG_REG_CHG_CNFG_01,
+ CHG_CNFG_01_FCHGTIME_MASK, data);
+}
+
+static ssize_t fast_charge_timer_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ return device_attr_store(dev, attr, buf, count,
+ max77693_set_fast_charge_timer);
+}
+
+static ssize_t top_off_threshold_current_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct max77693_charger *chg = dev_get_drvdata(dev);
+ unsigned int data, val;
+ int ret;
+
+ ret = regmap_read(chg->max77693->regmap, MAX77693_CHG_REG_CHG_CNFG_03,
+ &data);
+ if (ret < 0)
+ return ret;
+
+ data &= CHG_CNFG_03_TOITH_MASK;
+ data >>= CHG_CNFG_03_TOITH_SHIFT;
+
+ if (data <= 0x04)
+ val = 100000 + data * 25000;
+ else
+ val = data * 50000;
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+}
+
+static int max77693_set_top_off_threshold_current(struct max77693_charger *chg,
+ unsigned long uamp)
+{
+ unsigned int data;
+
+ if (uamp < 100000 || uamp > 350000)
+ return -EINVAL;
+
+ if (uamp <= 200000)
+ data = (uamp - 100000) / 25000;
+ else
+ /* (200000, 350000> */
+ data = uamp / 50000;
+
+ data <<= CHG_CNFG_03_TOITH_SHIFT;
+
+ return regmap_update_bits(chg->max77693->regmap,
+ MAX77693_CHG_REG_CHG_CNFG_03,
+ CHG_CNFG_03_TOITH_MASK, data);
+}
+
+static ssize_t top_off_threshold_current_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ return device_attr_store(dev, attr, buf, count,
+ max77693_set_top_off_threshold_current);
+}
+
+static ssize_t top_off_timer_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct max77693_charger *chg = dev_get_drvdata(dev);
+ unsigned int data, val;
+ int ret;
+
+ ret = regmap_read(chg->max77693->regmap, MAX77693_CHG_REG_CHG_CNFG_03,
+ &data);
+ if (ret < 0)
+ return ret;
+
+ data &= CHG_CNFG_03_TOTIME_MASK;
+ data >>= CHG_CNFG_03_TOTIME_SHIFT;
+
+ val = data * 10;
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+}
+
+static int max77693_set_top_off_timer(struct max77693_charger *chg,
+ unsigned long minutes)
+{
+ unsigned int data;
+
+ if (minutes > 70)
+ return -EINVAL;
+
+ data = minutes / 10;
+ data <<= CHG_CNFG_03_TOTIME_SHIFT;
+
+ return regmap_update_bits(chg->max77693->regmap,
+ MAX77693_CHG_REG_CHG_CNFG_03,
+ CHG_CNFG_03_TOTIME_MASK, data);
+}
+
+static ssize_t top_off_timer_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ return device_attr_store(dev, attr, buf, count,
+ max77693_set_top_off_timer);
+}
+
+static DEVICE_ATTR_RW(fast_charge_timer);
+static DEVICE_ATTR_RW(top_off_threshold_current);
+static DEVICE_ATTR_RW(top_off_timer);
+
+static int max77693_set_constant_volt(struct max77693_charger *chg,
+ unsigned int uvolt)
+{
+ unsigned int data;
+
+ /*
+ * 0x00 - 3.650 V
+ * 0x01 - 3.675 V
+ * ...
+ * 0x1b - 4.325 V
+ * 0x1c - 4.340 V
+ * 0x1d - 4.350 V
+ * 0x1e - 4.375 V
+ * 0x1f - 4.400 V
+ */
+ if (uvolt >= 3650000 && uvolt < 4340000)
+ data = (uvolt - 3650000) / 25000;
+ else if (uvolt >= 4340000 && uvolt < 4350000)
+ data = 0x1c;
+ else if (uvolt >= 4350000 && uvolt <= 4400000)
+ data = 0x1d + (uvolt - 4350000) / 25000;
+ else {
+ dev_err(chg->dev, "Wrong value for charging constant voltage\n");
+ return -EINVAL;
+ }
+
+ data <<= CHG_CNFG_04_CHGCVPRM_SHIFT;
+
+ dev_dbg(chg->dev, "Charging constant voltage: %u (0x%x)\n", uvolt,
+ data);
+
+ return regmap_update_bits(chg->max77693->regmap,
+ MAX77693_CHG_REG_CHG_CNFG_04,
+ CHG_CNFG_04_CHGCVPRM_MASK, data);
+}
+
+static int max77693_set_min_system_volt(struct max77693_charger *chg,
+ unsigned int uvolt)
+{
+ unsigned int data;
+
+ if (uvolt < 3000000 || uvolt > 3700000) {
+ dev_err(chg->dev, "Wrong value for minimum system regulation voltage\n");
+ return -EINVAL;
+ }
+
+ data = (uvolt - 3000000) / 100000;
+
+ data <<= CHG_CNFG_04_MINVSYS_SHIFT;
+
+ dev_dbg(chg->dev, "Minimum system regulation voltage: %u (0x%x)\n",
+ uvolt, data);
+
+ return regmap_update_bits(chg->max77693->regmap,
+ MAX77693_CHG_REG_CHG_CNFG_04,
+ CHG_CNFG_04_MINVSYS_MASK, data);
+}
+
+static int max77693_set_thermal_regulation_temp(struct max77693_charger *chg,
+ unsigned int cels)
+{
+ unsigned int data;
+
+ switch (cels) {
+ case 70:
+ case 85:
+ case 100:
+ case 115:
+ data = (cels - 70) / 15;
+ break;
+ default:
+ dev_err(chg->dev, "Wrong value for thermal regulation loop temperature\n");
+ return -EINVAL;
+ }
+
+ data <<= CHG_CNFG_07_REGTEMP_SHIFT;
+
+ dev_dbg(chg->dev, "Thermal regulation loop temperature: %u (0x%x)\n",
+ cels, data);
+
+ return regmap_update_bits(chg->max77693->regmap,
+ MAX77693_CHG_REG_CHG_CNFG_07,
+ CHG_CNFG_07_REGTEMP_MASK, data);
+}
+
+static int max77693_set_batttery_overcurrent(struct max77693_charger *chg,
+ unsigned int uamp)
+{
+ unsigned int data;
+
+ if (uamp && (uamp < 2000000 || uamp > 3500000)) {
+ dev_err(chg->dev, "Wrong value for battery overcurrent\n");
+ return -EINVAL;
+ }
+
+ if (uamp)
+ data = ((uamp - 2000000) / 250000) + 1;
+ else
+ data = 0; /* disable */
+
+ data <<= CHG_CNFG_12_B2SOVRC_SHIFT;
+
+ dev_dbg(chg->dev, "Battery overcurrent: %u (0x%x)\n", uamp, data);
+
+ return regmap_update_bits(chg->max77693->regmap,
+ MAX77693_CHG_REG_CHG_CNFG_12,
+ CHG_CNFG_12_B2SOVRC_MASK, data);
+}
+
+static int max77693_set_charge_input_threshold_volt(struct max77693_charger *chg,
+ unsigned int uvolt)
+{
+ unsigned int data;
+
+ switch (uvolt) {
+ case 4300000:
+ data = 0x0;
+ break;
+ case 4700000:
+ case 4800000:
+ case 4900000:
+ data = (uvolt - 4700000) / 100000;
+ default:
+ dev_err(chg->dev, "Wrong value for charge input voltage regulation threshold\n");
+ return -EINVAL;
+ }
+
+ data <<= CHG_CNFG_12_VCHGINREG_SHIFT;
+
+ dev_dbg(chg->dev, "Charge input voltage regulation threshold: %u (0x%x)\n",
+ uvolt, data);
+
+ return regmap_update_bits(chg->max77693->regmap,
+ MAX77693_CHG_REG_CHG_CNFG_12,
+ CHG_CNFG_12_VCHGINREG_MASK, data);
+}
+
+/*
+ * Sets charger registers to proper and safe default values.
+ */
+static int max77693_reg_init(struct max77693_charger *chg)
+{
+ int ret;
+ unsigned int data;
+
+ /* Unlock charger register protection */
+ data = (0x3 << CHG_CNFG_06_CHGPROT_SHIFT);
+ ret = regmap_update_bits(chg->max77693->regmap,
+ MAX77693_CHG_REG_CHG_CNFG_06,
+ CHG_CNFG_06_CHGPROT_MASK, data);
+ if (ret) {
+ dev_err(chg->dev, "Error unlocking registers: %d\n", ret);
+ return ret;
+ }
+
+ ret = max77693_set_fast_charge_timer(chg, DEFAULT_FAST_CHARGE_TIMER);
+ if (ret)
+ return ret;
+
+ ret = max77693_set_top_off_threshold_current(chg,
+ DEFAULT_TOP_OFF_THRESHOLD_CURRENT);
+ if (ret)
+ return ret;
+
+ ret = max77693_set_top_off_timer(chg, DEFAULT_TOP_OFF_TIMER);
+ if (ret)
+ return ret;
+
+ if (!chg->pdata)
+ return 0;
+
+ ret = max77693_set_constant_volt(chg,
+ chg->pdata->constant_volt);
+ if (ret)
+ return ret;
+
+ ret = max77693_set_min_system_volt(chg,
+ chg->pdata->min_system_volt);
+ if (ret)
+ return ret;
+
+ ret = max77693_set_thermal_regulation_temp(chg,
+ chg->pdata->thermal_regulation_temp);
+ if (ret)
+ return ret;
+
+ ret = max77693_set_batttery_overcurrent(chg,
+ chg->pdata->batttery_overcurrent);
+ if (ret)
+ return ret;
+
+ ret = max77693_set_charge_input_threshold_volt(chg,
+ chg->pdata->charge_input_threshold_volt);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static struct max77693_charger_platform_data *max77693_dt_init(
+ struct device *dev)
+{
+ struct max77693_charger_platform_data *pdata;
+ struct device_node *np = dev->of_node;
+
+ if (!np)
+ return NULL;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ if (of_property_read_u32(np, "maxim,constant-microvolt",
+ &pdata->constant_volt))
+ pdata->constant_volt = DEFAULT_CONSTANT_VOLT;
+
+ if (of_property_read_u32(np, "maxim,min-system-microvolt",
+ &pdata->min_system_volt))
+ pdata->min_system_volt = DEFAULT_MIN_SYSTEM_VOLT;
+
+ if (of_property_read_u32(np, "maxim,thermal-regulation-celsius",
+ &pdata->thermal_regulation_temp))
+ pdata->thermal_regulation_temp = DEFAULT_THERMAL_REGULATION_TEMP;
+
+ if (of_property_read_u32(np, "maxim,battery-overcurrent-microamp",
+ &pdata->batttery_overcurrent))
+ pdata->batttery_overcurrent = DEFAULT_BATTERY_OVERCURRENT;
+
+ if (of_property_read_u32(np, "maxim,charge-input-threshold-microvolt",
+ &pdata->charge_input_threshold_volt))
+ pdata->charge_input_threshold_volt =
+ DEFAULT_CHARGER_INPUT_THRESHOLD_VOLT;
+
+ return pdata;
+}
+#else /* CONFIG_OF */
+static struct max77693_charger_platform_data *max77693_dt_init(
+ struct device *dev)
+{
+ return NULL;
+}
+#endif /* CONFIG_OF */
+
+static int max77693_charger_probe(struct platform_device *pdev)
+{
+ struct max77693_charger *chg;
+ struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
+ int ret;
+
+ chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
+ if (!chg)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, chg);
+ chg->dev = &pdev->dev;
+ chg->max77693 = max77693;
+
+ chg->pdata = max77693_dt_init(&pdev->dev);
+
+ ret = max77693_reg_init(chg);
+ if (ret)
+ return ret;
+
+ chg->charger.name = max77693_charger_name;
+ chg->charger.type = POWER_SUPPLY_TYPE_BATTERY;
+ chg->charger.properties = max77693_charger_props;
+ chg->charger.num_properties = ARRAY_SIZE(max77693_charger_props);
+ chg->charger.get_property = max77693_charger_get_property;
+
+ ret = device_create_file(&pdev->dev, &dev_attr_fast_charge_timer);
+ if (ret) {
+ dev_err(&pdev->dev, "failed: create fast charge timer sysfs entry\n");
+ goto err;
+ }
+
+ ret = device_create_file(&pdev->dev,
+ &dev_attr_top_off_threshold_current);
+ if (ret) {
+ dev_err(&pdev->dev, "failed: create top off current sysfs entry\n");
+ goto err;
+ }
+
+ ret = device_create_file(&pdev->dev, &dev_attr_top_off_timer);
+ if (ret) {
+ dev_err(&pdev->dev, "failed: create top off timer sysfs entry\n");
+ goto err;
+ }
+
+ ret = power_supply_register(&pdev->dev, &chg->charger);
+ if (ret) {
+ dev_err(&pdev->dev, "failed: power supply register\n");
+ goto err;
+ }
+
+ return 0;
+
+err:
+ device_remove_file(&pdev->dev, &dev_attr_top_off_timer);
+ device_remove_file(&pdev->dev, &dev_attr_top_off_threshold_current);
+ device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
+
+ return ret;
+}
+
+static int max77693_charger_remove(struct platform_device *pdev)
+{
+ struct max77693_charger *chg = platform_get_drvdata(pdev);
+
+ device_remove_file(&pdev->dev, &dev_attr_top_off_timer);
+ device_remove_file(&pdev->dev, &dev_attr_top_off_threshold_current);
+ device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
+
+ power_supply_unregister(&chg->charger);
+
+ return 0;
+}
+
+static const struct platform_device_id max77693_charger_id[] = {
+ { "max77693-charger", 0, },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, max77693_charger_id);
+
+static struct platform_driver max77693_charger_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "max77693-charger",
+ },
+ .probe = max77693_charger_probe,
+ .remove = max77693_charger_remove,
+ .id_table = max77693_charger_id,
+};
+module_platform_driver(max77693_charger_driver);
+
+MODULE_AUTHOR("Krzysztof Kozlowski <k.kozlowski@samsung.com>");
+MODULE_DESCRIPTION("Maxim 77693 charger driver");
+MODULE_LICENSE("GPL");
--
1.9.1
^ permalink raw reply related
* [PATCH RESEND v3 4/4] Documentation: power: max77693-charger: Document exported sysfs entry
From: Krzysztof Kozlowski @ 2014-11-06 15:12 UTC (permalink / raw)
To: Sebastian Reichel, Dmitry Eremin-Solenikov, David Woodhouse,
Samuel Ortiz, Lee Jones, linux-kernel, linux-pm, devicetree,
linux-api
Cc: Krzysztof Kozlowski, linux-samsung-soc, Bartlomiej Zolnierkiewicz,
Tomasz Figa, Kyungmin Park, linux-arm-kernel, Marek Szyprowski
In-Reply-To: <1415286720-6358-1-git-send-email-k.kozlowski@samsung.com>
Document the settings exported by max77693 charger driver through sysfs
entries:
- fast_charge_timer
- top_off_threshold_current
- top_off_timer
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
Documentation/ABI/testing/sysfs-class-power | 42 +++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
index 909e7602c717..369d2a2d7d3e 100644
--- a/Documentation/ABI/testing/sysfs-class-power
+++ b/Documentation/ABI/testing/sysfs-class-power
@@ -32,3 +32,45 @@ Description:
Valid values:
- 5, 6 or 7 (hours),
- 0: disabled.
+
+What: /sys/class/power_supply/max77693-charger/device/fast_charge_timer
+Date: January 2015
+KernelVersion: 3.19.0
+Contact: Krzysztof Kozlowski <k.kozlowski@samsung.com>
+Description:
+ This entry shows and sets the maximum time the max77693
+ charger operates in fast-charge mode. When the timer expires
+ the device will terminate fast-charge mode (charging current
+ will drop to 0 A) and will trigger interrupt.
+
+ Valid values:
+ - 4 - 16 (hours), step by 2 (rounded down)
+ - 0: disabled.
+
+What: /sys/class/power_supply/max77693-charger/device/top_off_threshold_current
+Date: January 2015
+KernelVersion: 3.19.0
+Contact: Krzysztof Kozlowski <k.kozlowski@samsung.com>
+Description:
+ This entry shows and sets the charging current threshold for
+ entering top-off charging mode. When charging current in fast
+ charge mode drops below this value, the charger will trigger
+ interrupt and start top-off charging mode.
+
+ Valid values:
+ - 100000 - 200000 (microamps), step by 25000 (rounded down)
+ - 200000 - 350000 (microamps), step by 50000 (rounded down)
+ - 0: disabled.
+
+What: /sys/class/power_supply/max77693-charger/device/top_off_timer
+Date: January 2015
+KernelVersion: 3.19.0
+Contact: Krzysztof Kozlowski <k.kozlowski@samsung.com>
+Description:
+ This entry shows and sets the maximum time the max77693
+ charger operates in top-off charge mode. When the timer expires
+ the device will terminate top-off charge mode (charging current
+ will drop to 0 A) and will trigger interrupt.
+
+ Valid values:
+ - 0 - 70 (minutes), step by 10 (rounded down)
--
1.9.1
^ permalink raw reply related
* [PATCH v2 1/2] Add preadv2/pwritev2 documentation.
From: Milosz Tanski @ 2014-11-06 15:44 UTC (permalink / raw)
To: linux-kernel
Cc: Christoph Hellwig, linux-fsdevel, linux-aio, Mel Gorman,
Volker Lendecke, Tejun Heo, Jeff Moyer, Theodore Ts'o,
Al Viro, linux-api, Michael Kerrisk, linux-man
In-Reply-To: <cover.1415220890.git.milosz@adfin.com>
New syscalls that are a variation on the preadv/pwritev but support an extra
flag argument.
Signed-off-by: Milosz Tanski <milosz@adfin.com>
Suggested-by: Jeff Moyer <jmoyer@redhat.com>
Fixes: Jeff Moyer <jmoyer@redhat.com>
---
man2/readv.2 | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++---------
1 file changed, 61 insertions(+), 10 deletions(-)
diff --git a/man2/readv.2 b/man2/readv.2
index 8748efa..31b3870 100644
--- a/man2/readv.2
+++ b/man2/readv.2
@@ -45,6 +45,12 @@ readv, writev, preadv, pwritev \- read or write data into multiple buffers
.sp
.BI "ssize_t pwritev(int " fd ", const struct iovec *" iov ", int " iovcnt ,
.BI " off_t " offset );
+.sp
+.BI "ssize_t preadv2(int " fd ", const struct iovec *" iov ", int " iovcnt ,
+.BI " off_t " offset ", int " flags );
+.sp
+.BI "ssize_t pwritev2(int " fd ", const struct iovec *" iov ", int " iovcnt ,
+.BI " off_t " offset ", int " flags );
.fi
.sp
.in -4n
@@ -162,9 +168,9 @@ The
system call combines the functionality of
.BR writev ()
and
-.BR pwrite (2).
+.BR pwrite (2) "."
It performs the same task as
-.BR writev (),
+.BR writev () ","
but adds a fourth argument,
.IR offset ,
which specifies the file offset at which the output operation
@@ -174,15 +180,41 @@ The file offset is not changed by these system calls.
The file referred to by
.I fd
must be capable of seeking.
+.SS preadv2() and pwritev2()
+
+This pair of system calls has similar functionality to the
+.BR preadv ()
+and
+.BR pwritev ()
+calls, but adds a fifth argument, \fIflags\fP, which modifies the behavior on a per call basis.
+
+Like the
+.BR preadv ()
+and
+.BR pwritev ()
+calls, they accept an \fIoffset\fP argument. Unlike those calls, if the \fIoffset\fP argument is set to -1 then the current file offset is used and updated.
+
+The \fIflags\fP arguments to
+.BR preadv2 ()
+and
+.BR pwritev2 ()
+contains a bitwise OR of one or more of the following flags:
+.TP
+.BR RWF_NONBLOCK " (only " preadv2() " since Linux 3.19)"
+Performs a non-blocking operation for regular files (not sockets) opened in buffered mode (not
+.BR O_DIRECT ")."
+
.SH RETURN VALUE
On success,
-.BR readv ()
-and
+.BR readv () ","
.BR preadv ()
-return the number of bytes read;
-.BR writev ()
and
+.BR preadv2 ()
+return the number of bytes read;
+.BR writev () ","
.BR pwritev ()
+and
+.BR pwritev2 ()
return the number of bytes written.
On error, \-1 is returned, and \fIerrno\fP is set appropriately.
.SH ERRORS
@@ -191,12 +223,22 @@ The errors are as given for
and
.BR write (2).
Furthermore,
-.BR preadv ()
-and
+.BR preadv () ","
+.BR preadv2 () ","
.BR pwritev ()
+and
+.BR pwritev2 ()
can also fail for the same reasons as
.BR lseek (2).
-Additionally, the following error is defined:
+Additionally, the following errors are defined:
+.TP
+.B EAGAIN
+The operation would block. This is possible if the file descriptor \fIfd\fP refers to a socket and has been marked nonblocking
+.RB ( O_NONBLOCK ),
+or the operation is a
+.BR preadv2
+and the \fIflags\fP argument is set to
+.BR RWF_NONBLOCK.
.TP
.B EINVAL
The sum of the
@@ -205,12 +247,17 @@ values overflows an
.I ssize_t
value.
Or, the vector count \fIiovcnt\fP is less than zero or greater than the
-permitted maximum.
+permitted maximum. Or, an unknown flag is specified in \fIflags\fP.
.SH VERSIONS
.BR preadv ()
and
.BR pwritev ()
first appeared in Linux 2.6.30; library support was added in glibc 2.10.
+.sp
+.BR preadv2 ()
+and
+.BR pwritev2 ()
+first appeared in Linux 3.19 (if we're lucky);
.SH CONFORMING TO
.BR readv (),
.BR writev ():
@@ -223,6 +270,10 @@ first appeared in Linux 2.6.30; library support was added in glibc 2.10.
.BR preadv (),
.BR pwritev ():
nonstandard, but present also on the modern BSDs.
+.sp
+.BR preadv2 (),
+.BR pwritev2 ():
+nonstandard, Linux extension.
.SH NOTES
.SS C library/kernel ABI differences
POSIX.1-2001 allows an implementation to place a limit on
--
1.9.1
--
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^ permalink raw reply related
* [PATCH v2 2/2] RWF_ODSYNC flag for pwritev2
From: Milosz Tanski @ 2014-11-06 15:44 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Christoph Hellwig, linux-fsdevel-u79uwXL29TY76Z2rM5mHXA,
linux-aio-Bw31MaZKKs3YtjvyW6yDsg, Mel Gorman, Volker Lendecke,
Tejun Heo, Jeff Moyer, Theodore Ts'o, Al Viro,
linux-api-u79uwXL29TY76Z2rM5mHXA, Michael Kerrisk,
linux-man-u79uwXL29TY76Z2rM5mHXA
In-Reply-To: <d2cbc4795f774b521e13ac448d07a1156c6aa04d.1415288353.git.milosz-B5zB6C1i6pkAvxtiuMwx3w@public.gmane.org>
Document RWF_ODSYNC flag for pwritev2 as implemented by Christoph Hellwig.
Signed-off-by: Milosz Tanski <milosz-B5zB6C1i6pkAvxtiuMwx3w@public.gmane.org>
---
man2/readv.2 | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/man2/readv.2 b/man2/readv.2
index 31b3870..ff1405c 100644
--- a/man2/readv.2
+++ b/man2/readv.2
@@ -203,6 +203,15 @@ contains a bitwise OR of one or more of the following flags:
.BR RWF_NONBLOCK " (only " preadv2() " since Linux 3.19)"
Performs a non-blocking operation for regular files (not sockets) opened in buffered mode (not
.BR O_DIRECT ")."
+.TP
+.BR RWF_DSYNC " (only " pwritev2() " since Linux 3.19)"
+Write operation will complete according to the requirements of synchronized I/O
+.I data
+integrity completion. This has the same effect on the operation as if the file handle was created by
+.BR open(2)
+with the
+.BR O_DSYNC
+flag.
.SH RETURN VALUE
On success,
@@ -333,6 +342,7 @@ nwritten = writev(STDOUT_FILENO, iov, 2);
.fi
.in
.SH SEE ALSO
+.BR open(2),
.BR pread (2),
.BR read (2),
.BR write (2)
--
1.9.1
^ permalink raw reply related
* Re: [PATCH v5 0/7] vfs: Non-blockling buffered fs read (page cache only)
From: Milosz Tanski @ 2014-11-06 15:46 UTC (permalink / raw)
To: Christoph Hellwig
Cc: LKML, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org,
Mel Gorman, Volker Lendecke, Tejun Heo, Jeff Moyer,
Theodore Ts'o, Al Viro, Linux API, Michael Kerrisk,
linux-arch
In-Reply-To: <20141106075641.GB15966@infradead.org>
On Thu, Nov 6, 2014 at 2:56 AM, Christoph Hellwig <hch@infradead.org> wrote:
> This series looks good, do you also have a man page sniplet to document
> the new syscalls?
>
I just send out the two patches for the man pages, ran out of time
yesterday to update it for RWF_ODSYNC.
--
Milosz Tanski
CTO
16 East 34th Street, 15th floor
New York, NY 10016
p: 646-253-9055
e: milosz@adfin.com
--
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^ permalink raw reply
* [PATCHv6 RFC 0/3] syscalls,x86: Add execveat() system call
From: David Drysdale @ 2014-11-06 16:07 UTC (permalink / raw)
To: Eric W. Biederman, Andy Lutomirski, Alexander Viro, Meredydd Luff,
linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Thomas Gleixner, Ingo Molnar, H. Peter Anvin, Andrew Morton,
Kees Cook, Arnd Bergmann, Rich Felker, Christoph Hellwig,
x86-DgEjT+Ai2ygdnm+yROfE0A, linux-arch-u79uwXL29TY76Z2rM5mHXA,
linux-api-u79uwXL29TY76Z2rM5mHXA, David Drysdale
Here's another pass at this. Some things to discuss in particular:
1) The current approach for interpreted execs (i.e. mostly "#!" scripts)
gives them an argv[1] filename like "/dev/fd/<fd>/<path>". This
means that script execution in a /proc-less system isn't going to
work, at least until interpreters get smart enough to spot and
special-case the leading "/dev/fd/<fd>", or until there's something
to use in place of /dev/fd -> /proc/self/fd (e.g. Al's dupfs
suggestion, https://lkml.org/lkml/2014/10/19/141).
So is an execveat(2) that (currently) only works for non-interpreted
programs still useful?
2) I don't like having to add a new LOOKUP_EMPTY_NOPATH flag
just to prevent O_PATH fds from being fexecve()ed -- alternative
suggestions welcomed. (More generally, I don't have a great
feel for what O_PATH is for; how bad would it be to just allow
them to be fexecve()ed?)
.........
This patch set adds execveat(2) for x86, and is derived from Meredydd
Luff's patch from Sept 2012 (https://lkml.org/lkml/2012/9/11/528).
The primary aim of adding an execveat syscall is to allow an
implementation of fexecve(3) that does not rely on the /proc
filesystem, at least for executables (rather than scripts). The
current glibc version of fexecve(3) is implemented via /proc, which
causes problems in sandboxed or otherwise restricted environments.
Given the desire for a /proc-free fexecve() implementation, HPA
suggested (https://lkml.org/lkml/2006/7/11/556) that an execveat(2)
syscall would be an appropriate generalization.
Also, having a new syscall means that it can take a flags argument
without back-compatibility concerns. The current implementation just
defines the AT_EMPTY_PATH and AT_SYMLINK_NOFOLLOW flags, but other
flags could be added in future -- for example, flags for new namespaces
(as suggested at https://lkml.org/lkml/2006/7/11/474).
Related history:
- https://lkml.org/lkml/2006/12/27/123 is an example of someone
realizing that fexecve() is likely to fail in a chroot environment.
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=514043 covered
documenting the /proc requirement of fexecve(3) in its manpage, to
"prevent other people from wasting their time".
- https://bugzilla.kernel.org/show_bug.cgi?id=74481 documented that
it's not possible to fexecve() a file descriptor for a script with
close-on-exec set (which is possible with the implementation here).
- https://bugzilla.redhat.com/show_bug.cgi?id=241609 described a
problem where a process that did setuid() could not fexecve()
because it no longer had access to /proc/self/fd; this has since
been fixed.
Changes since v5:
- Set new flag in bprm->interp_flags for O_CLOEXEC fds, so that binfmts
that invoke an interpreter fail the exec (as they will not be able
to access the invoked file). [Andy Lutomirski]
- Don't truncate long paths. [Andy Lutomirski]
- Commonize code to open the executed file. [Eric W. Biederman]
- Mark O_PATH file descriptors so they cannot be fexecve()ed.
- Make self-test more helpful, and add additional cases:
- file offset non-zero
- binary file without execute bit
- O_CLOEXEC fds
Changes since v4, suggested by Eric W. Biederman:
- Use empty filename with AT_EMPTY_PATH flag rather than NULL
pathname to request fexecve-like behaviour.
- Build pathname as "/dev/fd/<fd>/<filename>" (or "/dev/fd/<fd>")
rather than using d_path().
- Patch against v3.17 (bfe01a5ba249)
Changes since Meredydd's v3 patch:
- Added a selftest.
- Added a man page.
- Left open_exec() signature untouched to reduce patch impact
elsewhere (as suggested by Al Viro).
- Filled in bprm->filename with d_path() into a buffer, to avoid use
of potentially-ephemeral dentry->d_name.
- Patch against v3.14 (455c6fdbd21916).
David Drysdale (2):
syscalls,x86: implement execveat() system call
syscalls,x86: add selftest for execveat(2)
arch/x86/ia32/audit.c | 1 +
arch/x86/ia32/ia32entry.S | 1 +
arch/x86/kernel/audit_64.c | 1 +
arch/x86/kernel/entry_64.S | 28 +++
arch/x86/syscalls/syscall_32.tbl | 1 +
arch/x86/syscalls/syscall_64.tbl | 2 +
arch/x86/um/sys_call_table_64.c | 1 +
fs/binfmt_em86.c | 4 +
fs/binfmt_misc.c | 4 +
fs/binfmt_script.c | 10 +
fs/exec.c | 115 ++++++++++--
fs/namei.c | 8 +-
include/linux/binfmts.h | 4 +
include/linux/compat.h | 3 +
include/linux/fs.h | 1 +
include/linux/namei.h | 1 +
include/linux/sched.h | 4 +
include/linux/syscalls.h | 4 +
include/uapi/asm-generic/unistd.h | 4 +-
kernel/sys_ni.c | 3 +
lib/audit.c | 3 +
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/exec/.gitignore | 7 +
tools/testing/selftests/exec/Makefile | 25 +++
tools/testing/selftests/exec/execveat.c | 321 ++++++++++++++++++++++++++++++++
25 files changed, 542 insertions(+), 15 deletions(-)
create mode 100644 tools/testing/selftests/exec/.gitignore
create mode 100644 tools/testing/selftests/exec/Makefile
create mode 100644 tools/testing/selftests/exec/execveat.c
--
2.1.0.rc2.206.gedb03e5
^ permalink raw reply
* [PATCHv6 1/3] syscalls,x86: implement execveat() system call
From: David Drysdale @ 2014-11-06 16:07 UTC (permalink / raw)
To: Eric W. Biederman, Andy Lutomirski, Alexander Viro, Meredydd Luff,
linux-kernel
Cc: Thomas Gleixner, Ingo Molnar, H. Peter Anvin, Andrew Morton,
Kees Cook, Arnd Bergmann, Rich Felker, Christoph Hellwig, x86,
linux-arch, linux-api, David Drysdale
In-Reply-To: <1415290033-15771-1-git-send-email-drysdale@google.com>
Add a new execveat(2) system call. execveat() is to execve() as
openat() is to open(): it takes a file descriptor that refers to a
directory, and resolves the filename relative to that.
In addition, if the filename is empty and AT_EMPTY_PATH is specified,
execveat() executes the file to which the file descriptor refers. This
replicates the functionality of fexecve(), which is a system call in
other UNIXen, but in Linux glibc it depends on opening
"/proc/self/fd/<fd>" (and so relies on /proc being mounted).
The filename fed to the executed program as argv[0] (or the name of the
script fed to a script interpreter) will be of the form "/dev/fd/<fd>"
(for an empty filename) or "/dev/fd/<fd>/<filename>", effectively
reflecting how the executable was found. This does however mean that
execution of a script in a /proc-less environment won't work; also,
script execution via an O_CLOEXEC file descriptor fails (as the file
will not be accessible after exec).
Only x86-64, i386 and x32 ABIs are supported in this patch.
Based on patches by Meredydd Luff <meredydd@senatehouse.org>
Signed-off-by: David Drysdale <drysdale@google.com>
---
arch/x86/ia32/audit.c | 1 +
arch/x86/ia32/ia32entry.S | 1 +
arch/x86/kernel/audit_64.c | 1 +
arch/x86/kernel/entry_64.S | 28 ++++++++++
arch/x86/syscalls/syscall_32.tbl | 1 +
arch/x86/syscalls/syscall_64.tbl | 2 +
arch/x86/um/sys_call_table_64.c | 1 +
fs/binfmt_em86.c | 4 ++
fs/binfmt_misc.c | 4 ++
fs/binfmt_script.c | 10 ++++
fs/exec.c | 115 +++++++++++++++++++++++++++++++++-----
fs/namei.c | 8 ++-
include/linux/binfmts.h | 4 ++
include/linux/compat.h | 3 +
include/linux/fs.h | 1 +
include/linux/namei.h | 1 +
include/linux/sched.h | 4 ++
include/linux/syscalls.h | 4 ++
include/uapi/asm-generic/unistd.h | 4 +-
kernel/sys_ni.c | 3 +
lib/audit.c | 3 +
21 files changed, 188 insertions(+), 15 deletions(-)
diff --git a/arch/x86/ia32/audit.c b/arch/x86/ia32/audit.c
index 5d7b381da692..2eccc8932ae6 100644
--- a/arch/x86/ia32/audit.c
+++ b/arch/x86/ia32/audit.c
@@ -35,6 +35,7 @@ int ia32_classify_syscall(unsigned syscall)
case __NR_socketcall:
return 4;
case __NR_execve:
+ case __NR_execveat:
return 5;
default:
return 1;
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index 4299eb05023c..2516c09743e0 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -464,6 +464,7 @@ GLOBAL(\label)
PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn
PTREGSCALL stub32_sigreturn, sys32_sigreturn
PTREGSCALL stub32_execve, compat_sys_execve
+ PTREGSCALL stub32_execveat, compat_sys_execveat
PTREGSCALL stub32_fork, sys_fork
PTREGSCALL stub32_vfork, sys_vfork
diff --git a/arch/x86/kernel/audit_64.c b/arch/x86/kernel/audit_64.c
index 06d3e5a14d9d..f3672508b249 100644
--- a/arch/x86/kernel/audit_64.c
+++ b/arch/x86/kernel/audit_64.c
@@ -50,6 +50,7 @@ int audit_classify_syscall(int abi, unsigned syscall)
case __NR_openat:
return 3;
case __NR_execve:
+ case __NR_execveat:
return 5;
default:
return 0;
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 2fac1343a90b..00c4526e6ffe 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -665,6 +665,20 @@ ENTRY(stub_execve)
CFI_ENDPROC
END(stub_execve)
+ENTRY(stub_execveat)
+ CFI_STARTPROC
+ addq $8, %rsp
+ PARTIAL_FRAME 0
+ SAVE_REST
+ FIXUP_TOP_OF_STACK %r11
+ call sys_execveat
+ RESTORE_TOP_OF_STACK %r11
+ movq %rax,RAX(%rsp)
+ RESTORE_REST
+ jmp int_ret_from_sys_call
+ CFI_ENDPROC
+END(stub_execveat)
+
/*
* sigreturn is special because it needs to restore all registers on return.
* This cannot be done with SYSRET, so use the IRET return path instead.
@@ -710,6 +724,20 @@ ENTRY(stub_x32_execve)
CFI_ENDPROC
END(stub_x32_execve)
+ENTRY(stub_x32_execveat)
+ CFI_STARTPROC
+ addq $8, %rsp
+ PARTIAL_FRAME 0
+ SAVE_REST
+ FIXUP_TOP_OF_STACK %r11
+ call compat_sys_execveat
+ RESTORE_TOP_OF_STACK %r11
+ movq %rax,RAX(%rsp)
+ RESTORE_REST
+ jmp int_ret_from_sys_call
+ CFI_ENDPROC
+END(stub_x32_execveat)
+
#endif
/*
diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
index 028b78168d85..2633e3195455 100644
--- a/arch/x86/syscalls/syscall_32.tbl
+++ b/arch/x86/syscalls/syscall_32.tbl
@@ -363,3 +363,4 @@
354 i386 seccomp sys_seccomp
355 i386 getrandom sys_getrandom
356 i386 memfd_create sys_memfd_create
+357 i386 execveat sys_execveat stub32_execveat
diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/syscalls/syscall_64.tbl
index 35dd922727b9..1af5badd159c 100644
--- a/arch/x86/syscalls/syscall_64.tbl
+++ b/arch/x86/syscalls/syscall_64.tbl
@@ -327,6 +327,7 @@
318 common getrandom sys_getrandom
319 common memfd_create sys_memfd_create
320 common kexec_file_load sys_kexec_file_load
+321 64 execveat stub_execveat
#
# x32-specific system call numbers start at 512 to avoid cache impact
@@ -365,3 +366,4 @@
542 x32 getsockopt compat_sys_getsockopt
543 x32 io_setup compat_sys_io_setup
544 x32 io_submit compat_sys_io_submit
+545 x32 execveat stub_x32_execveat
diff --git a/arch/x86/um/sys_call_table_64.c b/arch/x86/um/sys_call_table_64.c
index f2f0723070ca..20c3649d0691 100644
--- a/arch/x86/um/sys_call_table_64.c
+++ b/arch/x86/um/sys_call_table_64.c
@@ -31,6 +31,7 @@
#define stub_fork sys_fork
#define stub_vfork sys_vfork
#define stub_execve sys_execve
+#define stub_execveat sys_execveat
#define stub_rt_sigreturn sys_rt_sigreturn
#define __SYSCALL_COMMON(nr, sym, compat) __SYSCALL_64(nr, sym, compat)
diff --git a/fs/binfmt_em86.c b/fs/binfmt_em86.c
index f37b08cea1f7..490538536cb4 100644
--- a/fs/binfmt_em86.c
+++ b/fs/binfmt_em86.c
@@ -42,6 +42,10 @@ static int load_em86(struct linux_binprm *bprm)
return -ENOEXEC;
}
+ /* Need to be able to load the file after exec */
+ if (bprm->interp_flags & BINPRM_FLAGS_PATH_INACCESSIBLE)
+ return -ENOENT;
+
allow_write_access(bprm->file);
fput(bprm->file);
bprm->file = NULL;
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index b60500300dd7..e659f5562356 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -127,6 +127,10 @@ static int load_misc_binary(struct linux_binprm *bprm)
if (!fmt)
goto _ret;
+ /* Need to be able to load the file after exec */
+ if (bprm->interp_flags & BINPRM_FLAGS_PATH_INACCESSIBLE)
+ return -ENOENT;
+
if (!(fmt->flags & MISC_FMT_PRESERVE_ARGV0)) {
retval = remove_arg_zero(bprm);
if (retval)
diff --git a/fs/binfmt_script.c b/fs/binfmt_script.c
index 5027a3e14922..afdf4e3cafc2 100644
--- a/fs/binfmt_script.c
+++ b/fs/binfmt_script.c
@@ -24,6 +24,16 @@ static int load_script(struct linux_binprm *bprm)
if ((bprm->buf[0] != '#') || (bprm->buf[1] != '!'))
return -ENOEXEC;
+
+ /*
+ * If the script filename will be inaccessible after exec, typically
+ * because it is a "/dev/fd/<fd>/.." path against an O_CLOEXEC fd, give
+ * up now (on the assumption that the interpreter will want to load
+ * this file).
+ */
+ if (bprm->interp_flags & BINPRM_FLAGS_PATH_INACCESSIBLE)
+ return -ENOENT;
+
/*
* This section does the #! interpretation.
* Sorta complicated, but hopefully it will work. -TYT
diff --git a/fs/exec.c b/fs/exec.c
index a2b42a98c743..800d232c17bb 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -747,18 +747,26 @@ EXPORT_SYMBOL(setup_arg_pages);
#endif /* CONFIG_MMU */
-static struct file *do_open_exec(struct filename *name)
+static struct file *do_open_execat(int fd, struct filename *name, int flags)
{
struct file *file;
int err;
- static const struct open_flags open_exec_flags = {
+ struct open_flags open_exec_flags = {
.open_flag = O_LARGEFILE | O_RDONLY | __FMODE_EXEC,
.acc_mode = MAY_EXEC | MAY_OPEN,
.intent = LOOKUP_OPEN,
.lookup_flags = LOOKUP_FOLLOW,
};
- file = do_filp_open(AT_FDCWD, name, &open_exec_flags);
+ if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0)
+ return ERR_PTR(-EINVAL);
+ if (flags & AT_SYMLINK_NOFOLLOW)
+ open_exec_flags.lookup_flags &= ~LOOKUP_FOLLOW;
+ if (flags & AT_EMPTY_PATH)
+ open_exec_flags.lookup_flags |= (LOOKUP_EMPTY |
+ LOOKUP_EMPTY_NOPATH);
+
+ file = do_filp_open(fd, name, &open_exec_flags);
if (IS_ERR(file))
goto out;
@@ -769,12 +777,13 @@ static struct file *do_open_exec(struct filename *name)
if (file->f_path.mnt->mnt_flags & MNT_NOEXEC)
goto exit;
- fsnotify_open(file);
-
err = deny_write_access(file);
if (err)
goto exit;
+ if (name->name[0] != '\0')
+ fsnotify_open(file);
+
out:
return file;
@@ -786,7 +795,7 @@ exit:
struct file *open_exec(const char *name)
{
struct filename tmp = { .name = name };
- return do_open_exec(&tmp);
+ return do_open_execat(AT_FDCWD, &tmp, 0);
}
EXPORT_SYMBOL(open_exec);
@@ -1422,10 +1431,12 @@ static int exec_binprm(struct linux_binprm *bprm)
/*
* sys_execve() executes a new program.
*/
-static int do_execve_common(struct filename *filename,
- struct user_arg_ptr argv,
- struct user_arg_ptr envp)
+static int do_execveat_common(int fd, struct filename *filename,
+ struct user_arg_ptr argv,
+ struct user_arg_ptr envp,
+ int flags)
{
+ char *pathbuf = NULL;
struct linux_binprm *bprm;
struct file *file;
struct files_struct *displaced;
@@ -1466,7 +1477,7 @@ static int do_execve_common(struct filename *filename,
check_unsafe_exec(bprm);
current->in_execve = 1;
- file = do_open_exec(filename);
+ file = do_open_execat(fd, filename, flags);
retval = PTR_ERR(file);
if (IS_ERR(file))
goto out_unmark;
@@ -1474,7 +1485,30 @@ static int do_execve_common(struct filename *filename,
sched_exec();
bprm->file = file;
- bprm->filename = bprm->interp = filename->name;
+ if (fd == AT_FDCWD || filename->name[0] == '/') {
+ bprm->filename = filename->name;
+ } else {
+ /* "/dev/fd/2147483647/" + filename->name */
+ int maxlen = 19 + strlen(filename->name);
+
+ pathbuf = kmalloc(maxlen, GFP_TEMPORARY);
+ if (!pathbuf) {
+ retval = -ENOMEM;
+ goto out_unmark;
+ }
+ if (filename->name[0] == '\0')
+ sprintf(pathbuf, "/dev/fd/%d", fd);
+ else
+ snprintf(pathbuf, maxlen,
+ "/dev/fd/%d/%s", fd, filename->name);
+ /* Record that a name derived from an O_CLOEXEC fd will be
+ * inaccessible after exec. Relies on having exclusive access to
+ * current->files (due to unshare_files above). */
+ if (close_on_exec(fd, current->files->fdt))
+ bprm->interp_flags |= BINPRM_FLAGS_PATH_INACCESSIBLE;
+ bprm->filename = pathbuf;
+ }
+ bprm->interp = bprm->filename;
retval = bprm_mm_init(bprm);
if (retval)
@@ -1532,6 +1566,7 @@ out_unmark:
out_free:
free_bprm(bprm);
+ kfree(pathbuf);
out_files:
if (displaced)
@@ -1547,7 +1582,18 @@ int do_execve(struct filename *filename,
{
struct user_arg_ptr argv = { .ptr.native = __argv };
struct user_arg_ptr envp = { .ptr.native = __envp };
- return do_execve_common(filename, argv, envp);
+ return do_execveat_common(AT_FDCWD, filename, argv, envp, 0);
+}
+
+int do_execveat(int fd, struct filename *filename,
+ const char __user *const __user *__argv,
+ const char __user *const __user *__envp,
+ int flags)
+{
+ struct user_arg_ptr argv = { .ptr.native = __argv };
+ struct user_arg_ptr envp = { .ptr.native = __envp };
+
+ return do_execveat_common(fd, filename, argv, envp, flags);
}
#ifdef CONFIG_COMPAT
@@ -1563,7 +1609,23 @@ static int compat_do_execve(struct filename *filename,
.is_compat = true,
.ptr.compat = __envp,
};
- return do_execve_common(filename, argv, envp);
+ return do_execveat_common(AT_FDCWD, filename, argv, envp, 0);
+}
+
+static int compat_do_execveat(int fd, struct filename *filename,
+ const compat_uptr_t __user *__argv,
+ const compat_uptr_t __user *__envp,
+ int flags)
+{
+ struct user_arg_ptr argv = {
+ .is_compat = true,
+ .ptr.compat = __argv,
+ };
+ struct user_arg_ptr envp = {
+ .is_compat = true,
+ .ptr.compat = __envp,
+ };
+ return do_execveat_common(fd, filename, argv, envp, flags);
}
#endif
@@ -1603,6 +1665,20 @@ SYSCALL_DEFINE3(execve,
{
return do_execve(getname(filename), argv, envp);
}
+
+SYSCALL_DEFINE5(execveat,
+ int, fd, const char __user *, filename,
+ const char __user *const __user *, argv,
+ const char __user *const __user *, envp,
+ int, flags)
+{
+ int lookup_flags = (flags & AT_EMPTY_PATH) ? LOOKUP_EMPTY : 0;
+
+ return do_execveat(fd,
+ getname_flags(filename, lookup_flags, NULL),
+ argv, envp, flags);
+}
+
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE3(execve, const char __user *, filename,
const compat_uptr_t __user *, argv,
@@ -1610,4 +1686,17 @@ COMPAT_SYSCALL_DEFINE3(execve, const char __user *, filename,
{
return compat_do_execve(getname(filename), argv, envp);
}
+
+COMPAT_SYSCALL_DEFINE5(execveat, int, fd,
+ const char __user *, filename,
+ const compat_uptr_t __user *, argv,
+ const compat_uptr_t __user *, envp,
+ int, flags)
+{
+ int lookup_flags = (flags & AT_EMPTY_PATH) ? LOOKUP_EMPTY : 0;
+
+ return compat_do_execveat(fd,
+ getname_flags(filename, lookup_flags, NULL),
+ argv, envp, flags);
+}
#endif
diff --git a/fs/namei.c b/fs/namei.c
index a7b05bf82d31..757df6777ae5 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -130,7 +130,7 @@ void final_putname(struct filename *name)
#define EMBEDDED_NAME_MAX (PATH_MAX - sizeof(struct filename))
-static struct filename *
+struct filename *
getname_flags(const char __user *filename, int flags, int *empty)
{
struct filename *result, *err;
@@ -1891,6 +1891,12 @@ static int path_init(int dfd, const char *name, unsigned int flags,
fdput(f);
return -ENOTDIR;
}
+ } else if (flags & LOOKUP_EMPTY_NOPATH) {
+ /* When using the fd alone, disallow O_PATH files */
+ if (f.file->f_mode & FMODE_PATH) {
+ fdput(f);
+ return -EBADF;
+ }
}
nd->path = f.file->f_path;
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index 61f29e5ea840..576e4639ca60 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -53,6 +53,10 @@ struct linux_binprm {
#define BINPRM_FLAGS_EXECFD_BIT 1
#define BINPRM_FLAGS_EXECFD (1 << BINPRM_FLAGS_EXECFD_BIT)
+/* filename of the binary will be inaccessible after exec */
+#define BINPRM_FLAGS_PATH_INACCESSIBLE_BIT 2
+#define BINPRM_FLAGS_PATH_INACCESSIBLE (1 << BINPRM_FLAGS_PATH_INACCESSIBLE_BIT)
+
/* Function parameter for binfmt->coredump */
struct coredump_params {
const siginfo_t *siginfo;
diff --git a/include/linux/compat.h b/include/linux/compat.h
index e6494261eaff..7450ca2ac1fc 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -357,6 +357,9 @@ asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
const compat_uptr_t __user *envp);
+asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
+ const compat_uptr_t __user *argv,
+ const compat_uptr_t __user *envp, int flags);
asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 94187721ad41..e9818574d738 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2060,6 +2060,7 @@ extern struct file *file_open_root(struct dentry *, struct vfsmount *,
extern struct file * dentry_open(const struct path *, int, const struct cred *);
extern int filp_close(struct file *, fl_owner_t id);
+extern struct filename *getname_flags(const char __user *, int, int *);
extern struct filename *getname(const char __user *);
extern struct filename *getname_kernel(const char *);
diff --git a/include/linux/namei.h b/include/linux/namei.h
index 492de72560fa..eaa25cc72213 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -55,6 +55,7 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND};
#define LOOKUP_JUMPED 0x1000
#define LOOKUP_ROOT 0x2000
#define LOOKUP_EMPTY 0x4000
+#define LOOKUP_EMPTY_NOPATH 0x8000
extern int user_path_at(int, const char __user *, unsigned, struct path *);
extern int user_path_at_empty(int, const char __user *, unsigned, struct path *, int *empty);
diff --git a/include/linux/sched.h b/include/linux/sched.h
index b867a4dab38a..33e056da7d33 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2430,6 +2430,10 @@ extern void do_group_exit(int);
extern int do_execve(struct filename *,
const char __user * const __user *,
const char __user * const __user *);
+extern int do_execveat(int, struct filename *,
+ const char __user * const __user *,
+ const char __user * const __user *,
+ int);
extern long do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *);
struct task_struct *fork_idle(int);
extern pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 0f86d85a9ce4..df5422294deb 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -876,4 +876,8 @@ asmlinkage long sys_seccomp(unsigned int op, unsigned int flags,
asmlinkage long sys_getrandom(char __user *buf, size_t count,
unsigned int flags);
+asmlinkage long sys_execveat(int dfd, const char __user *filename,
+ const char __user *const __user *argv,
+ const char __user *const __user *envp, int flags);
+
#endif
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index 11d11bc5c78f..feef07d29663 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -705,9 +705,11 @@ __SYSCALL(__NR_seccomp, sys_seccomp)
__SYSCALL(__NR_getrandom, sys_getrandom)
#define __NR_memfd_create 279
__SYSCALL(__NR_memfd_create, sys_memfd_create)
+#define __NR_execveat 280
+__SC_COMP(__NR_execveat, sys_execveat, compat_sys_execveat)
#undef __NR_syscalls
-#define __NR_syscalls 280
+#define __NR_syscalls 281
/*
* All syscalls below here should go away really,
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 391d4ddb6f4b..efb06058ad3e 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -218,3 +218,6 @@ cond_syscall(sys_kcmp);
/* operate on Secure Computing state */
cond_syscall(sys_seccomp);
+
+/* execveat */
+cond_syscall(sys_execveat);
diff --git a/lib/audit.c b/lib/audit.c
index 1d726a22565b..b8fb5ee81e26 100644
--- a/lib/audit.c
+++ b/lib/audit.c
@@ -54,6 +54,9 @@ int audit_classify_syscall(int abi, unsigned syscall)
case __NR_socketcall:
return 4;
#endif
+#ifdef __NR_execveat
+ case __NR_execveat:
+#endif
case __NR_execve:
return 5;
default:
--
2.1.0.rc2.206.gedb03e5
^ permalink raw reply related
* [PATCHv6 2/3] syscalls,x86: add selftest for execveat(2)
From: David Drysdale @ 2014-11-06 16:07 UTC (permalink / raw)
To: Eric W. Biederman, Andy Lutomirski, Alexander Viro, Meredydd Luff,
linux-kernel
Cc: Thomas Gleixner, Ingo Molnar, H. Peter Anvin, Andrew Morton,
Kees Cook, Arnd Bergmann, Rich Felker, Christoph Hellwig, x86,
linux-arch, linux-api, David Drysdale
In-Reply-To: <1415290033-15771-1-git-send-email-drysdale@google.com>
Signed-off-by: David Drysdale <drysdale@google.com>
---
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/exec/.gitignore | 7 +
tools/testing/selftests/exec/Makefile | 25 +++
tools/testing/selftests/exec/execveat.c | 321 ++++++++++++++++++++++++++++++++
4 files changed, 354 insertions(+)
create mode 100644 tools/testing/selftests/exec/.gitignore
create mode 100644 tools/testing/selftests/exec/Makefile
create mode 100644 tools/testing/selftests/exec/execveat.c
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 36ff2e4c7b6f..210cf68b3511 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -14,6 +14,7 @@ TARGETS += powerpc
TARGETS += user
TARGETS += sysctl
TARGETS += firmware
+TARGETS += exec
TARGETS_HOTPLUG = cpu-hotplug
TARGETS_HOTPLUG += memory-hotplug
diff --git a/tools/testing/selftests/exec/.gitignore b/tools/testing/selftests/exec/.gitignore
new file mode 100644
index 000000000000..778147d01af9
--- /dev/null
+++ b/tools/testing/selftests/exec/.gitignore
@@ -0,0 +1,7 @@
+subdir*
+script*
+execveat
+execveat.symlink
+execveat.moved
+execveat.ephemeral
+execveat.denatured
\ No newline at end of file
diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
new file mode 100644
index 000000000000..c97e0aaea02d
--- /dev/null
+++ b/tools/testing/selftests/exec/Makefile
@@ -0,0 +1,25 @@
+CC = $(CROSS_COMPILE)gcc
+CFLAGS = -Wall
+BINARIES = execveat
+DEPS = execveat.symlink execveat.denatured script subdir
+all: $(BINARIES) $(DEPS)
+
+subdir:
+ mkdir -p $@
+script:
+ echo '#!/bin/sh' > $@
+ echo 'exit $$*' >> $@
+ chmod +x $@
+execveat.symlink: execveat
+ ln -s -f $< $@
+execveat.denatured: execveat
+ cp $< $@
+ chmod -x $@
+%: %.c
+ $(CC) $(CFLAGS) -o $@ $^
+
+run_tests: all
+ ./execveat
+
+clean:
+ rm -rf $(BINARIES) $(DEPS) subdir.moved execveat.moved
diff --git a/tools/testing/selftests/exec/execveat.c b/tools/testing/selftests/exec/execveat.c
new file mode 100644
index 000000000000..f6ea48176393
--- /dev/null
+++ b/tools/testing/selftests/exec/execveat.c
@@ -0,0 +1,321 @@
+/*
+ * Copyright (c) 2014 Google, Inc.
+ *
+ * Licensed under the terms of the GNU GPL License version 2
+ *
+ * Selftests for execveat(2).
+ */
+
+#define _GNU_SOURCE /* to get O_PATH, AT_EMPTY_PATH */
+#include <sys/sendfile.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static char *envp[] = { "IN_TEST=yes", NULL, NULL };
+static char *argv[] = { "execveat", "99", NULL };
+
+static int execveat_(int fd, const char *path, char **argv, char **envp,
+ int flags)
+{
+#ifdef __NR_execveat
+ return syscall(__NR_execveat, fd, path, argv, envp, flags);
+#else
+ errno = -ENOSYS;
+ return -1;
+#endif
+}
+
+#define check_execveat_fail(fd, path, flags, errno) \
+ _check_execveat_fail(fd, path, flags, errno, #errno)
+static int _check_execveat_fail(int fd, const char *path, int flags,
+ int expected_errno, const char *errno_str)
+{
+ int rc;
+
+ errno = 0;
+ printf("Check failure of execveat(%d, '%s', %d) with %s... ",
+ fd, path?:"(null)", flags, errno_str);
+ rc = execveat_(fd, path, argv, envp, flags);
+
+ if (rc > 0) {
+ printf("[FAIL] (unexpected success from execveat(2))\n");
+ return 1;
+ }
+ if (errno != expected_errno) {
+ printf("[FAIL] (expected errno %d (%s) not %d (%s)\n",
+ expected_errno, strerror(expected_errno),
+ errno, strerror(errno));
+ return 1;
+ }
+ printf("[OK]\n");
+ return 0;
+}
+
+static int check_execveat_invoked_rc(int fd, const char *path, int flags,
+ int expected_rc)
+{
+ int status;
+ int rc;
+ pid_t child;
+
+ printf("Check success of execveat(%d, '%s', %d)... ",
+ fd, path?:"(null)", flags);
+ child = fork();
+ if (child < 0) {
+ printf("[FAIL] (fork() failed)\n");
+ return 1;
+ }
+ if (child == 0) {
+ /* Child: do execveat(). */
+ rc = execveat_(fd, path, argv, envp, flags);
+ printf("[FAIL]: execveat() failed, rc=%d errno=%d (%s)\n",
+ rc, errno, strerror(errno));
+ exit(1); /* should not reach here */
+ }
+ /* Parent: wait for & check child's exit status. */
+ rc = waitpid(child, &status, 0);
+ if (rc != child) {
+ printf("[FAIL] (waitpid(%d,...) returned %d)\n", child, rc);
+ return 1;
+ }
+ if (!WIFEXITED(status)) {
+ printf("[FAIL] (child %d did not exit cleanly, status=%08x)\n",
+ child, status);
+ return 1;
+ }
+ if (WEXITSTATUS(status) != expected_rc) {
+ printf("[FAIL] (child %d exited with %d not %d)\n",
+ child, WEXITSTATUS(status), expected_rc);
+ return 1;
+ }
+ printf("[OK]\n");
+ return 0;
+}
+
+static int check_execveat(int fd, const char *path, int flags)
+{
+ return check_execveat_invoked_rc(fd, path, flags, 99);
+}
+
+static char *concat(const char *left, const char *right)
+{
+ char *result = malloc(strlen(left) + strlen(right) + 1);
+
+ strcpy(result, left);
+ strcat(result, right);
+ return result;
+}
+
+static int open_or_die(const char *filename, int flags)
+{
+ int fd = open(filename, flags);
+
+ if (fd < 0) {
+ printf("Failed to open '%s'; "
+ "check prerequisites are available\n", filename);
+ exit(1);
+ }
+ return fd;
+}
+
+static int run_tests(void)
+{
+ int fail = 0;
+ char *fullname = realpath("execveat", NULL);
+ char *fullname_script = realpath("script", NULL);
+ char *fullname_symlink = concat(fullname, ".symlink");
+ int subdir_dfd = open_or_die("subdir", O_DIRECTORY|O_RDONLY);
+ int subdir_dfd_ephemeral = open_or_die("subdir.ephemeral",
+ O_DIRECTORY|O_RDONLY);
+ int dot_dfd = open_or_die(".", O_DIRECTORY|O_RDONLY);
+ int dot_dfd_path = open_or_die(".", O_DIRECTORY|O_RDONLY|O_PATH);
+ int dot_dfd_cloexec = open_or_die(".", O_DIRECTORY|O_RDONLY|O_CLOEXEC);
+ int fd = open_or_die("execveat", O_RDONLY);
+ int fd_path = open_or_die("execveat", O_RDONLY|O_PATH);
+ int fd_symlink = open_or_die("execveat.symlink", O_RDONLY);
+ int fd_denatured = open_or_die("execveat.denatured", O_RDONLY);
+ int fd_script = open_or_die("script", O_RDONLY);
+ int fd_ephemeral = open_or_die("execveat.ephemeral", O_RDONLY);
+ int fd_script_ephemeral = open_or_die("script.ephemeral", O_RDONLY);
+ int fd_cloexec = open_or_die("execveat", O_RDONLY|O_CLOEXEC);
+ int fd_script_cloexec = open_or_die("script", O_RDONLY|O_CLOEXEC);
+
+ /* Change file position to confirm it doesn't affect anything */
+ lseek(fd, 10, SEEK_SET);
+
+ /* Normal executable file: */
+ /* dfd + path */
+ fail += check_execveat(subdir_dfd, "../execveat", 0);
+ fail += check_execveat(dot_dfd, "execveat", 0);
+ fail += check_execveat(dot_dfd_path, "execveat", 0);
+ /* absolute path */
+ fail += check_execveat(AT_FDCWD, fullname, 0);
+ /* absolute path with nonsense dfd */
+ fail += check_execveat(99, fullname, 0);
+ /* fd + no path */
+ fail += check_execveat(fd, "", AT_EMPTY_PATH);
+ /* O_CLOEXEC fd + no path */
+ fail += check_execveat(fd_cloexec, "", AT_EMPTY_PATH);
+
+ /* Mess with executable file that's already open: */
+ /* fd + no path to a file that's been renamed */
+ rename("execveat.ephemeral", "execveat.moved");
+ fail += check_execveat(fd_ephemeral, "", AT_EMPTY_PATH);
+ /* fd + no path to a file that's been deleted */
+ unlink("execveat.moved"); /* remove the file now fd open */
+ fail += check_execveat(fd_ephemeral, "", AT_EMPTY_PATH);
+
+ /* Invalid argument failures */
+ fail += check_execveat_fail(fd, "", 0, ENOENT);
+ fail += check_execveat_fail(fd, NULL, AT_EMPTY_PATH, EFAULT);
+
+ /* Symlink to executable file: */
+ /* dfd + path */
+ fail += check_execveat(dot_dfd, "execveat.symlink", 0);
+ fail += check_execveat(dot_dfd_path, "execveat.symlink", 0);
+ /* absolute path */
+ fail += check_execveat(AT_FDCWD, fullname_symlink, 0);
+ /* fd + no path, even with AT_SYMLINK_NOFOLLOW (already followed) */
+ fail += check_execveat(fd_symlink, "", AT_EMPTY_PATH);
+ fail += check_execveat(fd_symlink, "",
+ AT_EMPTY_PATH|AT_SYMLINK_NOFOLLOW);
+
+ /* Symlink fails when AT_SYMLINK_NOFOLLOW set: */
+ /* dfd + path */
+ fail += check_execveat_fail(dot_dfd, "execveat.symlink",
+ AT_SYMLINK_NOFOLLOW, ELOOP);
+ fail += check_execveat_fail(dot_dfd_path, "execveat.symlink",
+ AT_SYMLINK_NOFOLLOW, ELOOP);
+ /* absolute path */
+ fail += check_execveat_fail(AT_FDCWD, fullname_symlink,
+ AT_SYMLINK_NOFOLLOW, ELOOP);
+
+ /* Shell script wrapping executable file: */
+ /* dfd + path */
+ fail += check_execveat(subdir_dfd, "../script", 0);
+ fail += check_execveat(dot_dfd, "script", 0);
+ fail += check_execveat(dot_dfd_path, "script", 0);
+ /* absolute path */
+ fail += check_execveat(AT_FDCWD, fullname_script, 0);
+ /* fd + no path */
+ fail += check_execveat(fd_script, "", AT_EMPTY_PATH);
+ fail += check_execveat(fd_script, "",
+ AT_EMPTY_PATH|AT_SYMLINK_NOFOLLOW);
+ /* O_CLOEXEC fd fails for a script (as script file inaccessible) */
+ fail += check_execveat_fail(fd_script_cloexec, "", AT_EMPTY_PATH,
+ ENOENT);
+ fail += check_execveat_fail(dot_dfd_cloexec, "script", 0, ENOENT);
+
+ /* Mess with script file that's already open: */
+ /* fd + no path to a file that's been renamed */
+ rename("script.ephemeral", "script.moved");
+ fail += check_execveat(fd_script_ephemeral, "", AT_EMPTY_PATH);
+ /* fd + no path to a file that's been deleted */
+ unlink("script.moved"); /* remove the file while fd open */
+ fail += check_execveat(fd_script_ephemeral, "", AT_EMPTY_PATH);
+
+ /* Rename a subdirectory in the path: */
+ rename("subdir.ephemeral", "subdir.moved");
+ fail += check_execveat(subdir_dfd_ephemeral, "../script", 0);
+ fail += check_execveat(subdir_dfd_ephemeral, "script", 0);
+ /* Remove the subdir and its contents */
+ unlink("subdir.moved/script");
+ unlink("subdir.moved");
+ /* Shell loads via deleted subdir OK because name starts with .. */
+ fail += check_execveat(subdir_dfd_ephemeral, "../script", 0);
+ fail += check_execveat_fail(subdir_dfd_ephemeral, "script", 0, ENOENT);
+
+ /* Flag values other than AT_SYMLINK_NOFOLLOW => EINVAL */
+ fail += check_execveat_fail(dot_dfd, "execveat", 0xFFFF, EINVAL);
+ /* Invalid path => ENOENT */
+ fail += check_execveat_fail(dot_dfd, "no-such-file", 0, ENOENT);
+ fail += check_execveat_fail(dot_dfd_path, "no-such-file", 0, ENOENT);
+ fail += check_execveat_fail(AT_FDCWD, "no-such-file", 0, ENOENT);
+ /* Attempt to execute directory => EACCES */
+ fail += check_execveat_fail(dot_dfd, "", AT_EMPTY_PATH, EACCES);
+ /* Attempt to execute non-executable => EACCES */
+ fail += check_execveat_fail(dot_dfd, "Makefile", 0, EACCES);
+ fail += check_execveat_fail(fd_denatured, "", AT_EMPTY_PATH, EACCES);
+ /* Attempt to execute file opened with O_PATH => EBADF */
+ fail += check_execveat_fail(fd_path, "", AT_EMPTY_PATH, EBADF);
+ /* Attempt to execute nonsense FD => EBADF */
+ fail += check_execveat_fail(99, "", AT_EMPTY_PATH, EBADF);
+ fail += check_execveat_fail(99, "execveat", 0, EBADF);
+ /* Attempt to execute relative to non-directory => ENOTDIR */
+ fail += check_execveat_fail(fd, "execveat", 0, ENOTDIR);
+
+ return fail;
+}
+
+static void exe_cp(const char *src, const char *dest)
+{
+ int in_fd = open_or_die(src, O_RDONLY);
+ int out_fd = open(dest, O_RDWR|O_CREAT|O_TRUNC, 0755);
+ struct stat info;
+
+ fstat(in_fd, &info);
+ sendfile(out_fd, in_fd, NULL, info.st_size);
+ close(in_fd);
+ close(out_fd);
+}
+
+static void prerequisites(void)
+{
+ int fd;
+ const char *script = "#!/bin/sh\nexit $*\n";
+
+ /* Create ephemeral copies of files */
+ exe_cp("execveat", "execveat.ephemeral");
+ exe_cp("script", "script.ephemeral");
+ mkdir("subdir.ephemeral", 0755);
+
+ fd = open("subdir.ephemeral/script", O_RDWR|O_CREAT|O_TRUNC, 0755);
+ write(fd, script, strlen(script));
+ close(fd);
+}
+
+int main(int argc, char **argv)
+{
+ int ii;
+ int rc;
+ const char *verbose = getenv("VERBOSE");
+
+ if (argc >= 2) {
+ /* If we are invoked with an argument, don't run tests. */
+ const char *in_test = getenv("IN_TEST");
+
+ if (verbose) {
+ printf(" invoked with:");
+ for (ii = 0; ii < argc; ii++)
+ printf(" [%d]='%s'", ii, argv[ii]);
+ printf("\n");
+ }
+
+ /* Check expected environment transferred. */
+ if (!in_test || strcmp(in_test, "yes") != 0) {
+ printf("[FAIL] (no IN_TEST=yes in env)\n");
+ return 1;
+ }
+
+ /* Use the final argument as an exit code. */
+ rc = atoi(argv[argc - 1]);
+ fflush(stdout);
+ } else {
+ prerequisites();
+ if (verbose)
+ envp[1] = "VERBOSE=1";
+ rc = run_tests();
+ if (rc > 0)
+ printf("%d tests failed\n", rc);
+ }
+ return rc;
+}
--
2.1.0.rc2.206.gedb03e5
^ permalink raw reply related
* [PATCHv6 man-pages 3/3] execveat.2: initial man page for execveat(2)
From: David Drysdale @ 2014-11-06 16:07 UTC (permalink / raw)
To: Eric W. Biederman, Andy Lutomirski, Alexander Viro, Meredydd Luff,
linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Thomas Gleixner, Ingo Molnar, H. Peter Anvin, Andrew Morton,
Kees Cook, Arnd Bergmann, Rich Felker, Christoph Hellwig,
x86-DgEjT+Ai2ygdnm+yROfE0A, linux-arch-u79uwXL29TY76Z2rM5mHXA,
linux-api-u79uwXL29TY76Z2rM5mHXA, David Drysdale
In-Reply-To: <1415290033-15771-1-git-send-email-drysdale-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Signed-off-by: David Drysdale <drysdale-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
---
man2/execveat.2 | 153 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 153 insertions(+)
create mode 100644 man2/execveat.2
diff --git a/man2/execveat.2 b/man2/execveat.2
new file mode 100644
index 000000000000..937d79e4c4f0
--- /dev/null
+++ b/man2/execveat.2
@@ -0,0 +1,153 @@
+.\" Copyright (c) 2014 Google, Inc.
+.\"
+.\" %%%LICENSE_START(VERBATIM)
+.\" Permission is granted to make and distribute verbatim copies of this
+.\" manual provided the copyright notice and this permission notice are
+.\" preserved on all copies.
+.\"
+.\" Permission is granted to copy and distribute modified versions of this
+.\" manual under the conditions for verbatim copying, provided that the
+.\" entire resulting derived work is distributed under the terms of a
+.\" permission notice identical to this one.
+.\"
+.\" Since the Linux kernel and libraries are constantly changing, this
+.\" manual page may be incorrect or out-of-date. The author(s) assume no
+.\" responsibility for errors or omissions, or for damages resulting from
+.\" the use of the information contained herein. The author(s) may not
+.\" have taken the same level of care in the production of this manual,
+.\" which is licensed free of charge, as they might when working
+.\" professionally.
+.\"
+.\" Formatted or processed versions of this manual, if unaccompanied by
+.\" the source, must acknowledge the copyright and authors of this work.
+.\" %%%LICENSE_END
+.\"
+.TH EXECVEAT 2 2014-04-02 "Linux" "Linux Programmer's Manual"
+.SH NAME
+execveat \- execute program relative to a directory file descriptor
+.SH SYNOPSIS
+.B #include <unistd.h>
+.sp
+.BI "int execveat(int " fd ", const char *" pathname ","
+.br
+.BI " char *const " argv "[], char *const " envp "[],"
+.br
+.BI " int " flags);
+.SH DESCRIPTION
+The
+.BR execveat ()
+system call executes the program pointed to by the combination of \fIfd\fP and \fIpathname\fP.
+The
+.BR execveat ()
+system call operates in exactly the same way as
+.BR execve (2),
+except for the differences described in this manual page.
+
+If the pathname given in
+.I pathname
+is relative, then it is interpreted relative to the directory
+referred to by the file descriptor
+.I fd
+(rather than relative to the current working directory of
+the calling process, as is done by
+.BR execve (2)
+for a relative pathname).
+
+If
+.I pathname
+is relative and
+.I fd
+is the special value
+.BR AT_FDCWD ,
+then
+.I pathname
+is interpreted relative to the current working
+directory of the calling process (like
+.BR execve (2)).
+
+If
+.I pathname
+is absolute, then
+.I fd
+is ignored.
+
+If
+.I pathname
+is an empty string and the
+.BR AT_EMPTY_PATH
+flag is specified, then the file descriptor
+.I fd
+specifies the file to be executed.
+
+.I flags
+can either be 0, or include the following flags:
+.TP
+.BR AT_EMPTY_PATH
+If
+.I pathname
+is an empty string, operate on the file referred to by
+.IR fd
+(which may have been obtained using the
+.BR open (2)
+.B O_PATH
+flag).
+.TP
+.B AT_SYMLINK_NOFOLLOW
+If the file identified by
+.I fd
+and a non-NULL
+.I pathname
+is a symbolic link, then the call fails with the error
+.BR EINVAL .
+.SH "RETURN VALUE"
+On success,
+.BR execveat ()
+does not return. On error \-1 is returned, and
+.I errno
+is set appropriately.
+.SH ERRORS
+The same errors that occur for
+.BR execve (2)
+can also occur for
+.BR execveat ().
+The following additional errors can occur for
+.BR execveat ():
+.TP
+.B EBADF
+.I fd
+is not a valid file descriptor.
+.TP
+.B ENOENT
+The program identified by \fIfd\fP and \fIpathname\fP requires the
+use of an interpreter program (such as a script starting with
+"#!") but the file descriptor
+.I fd
+was opened with the
+.B O_CLOEXEC
+flag and so the program file is inaccessible to the launched interpreter.
+.TP
+.B EINVAL
+Invalid flag specified in
+.IR flags .
+.TP
+.B ENOTDIR
+.I pathname
+is relative and
+.I fd
+is a file descriptor referring to a file other than a directory.
+.SH VERSIONS
+.BR execveat ()
+was added to Linux in kernel 3.???.
+.SH NOTES
+In addition to the reasons explained in
+.BR openat (2),
+the
+.BR execveat ()
+system call is also needed to allow
+.BR fexecve (3)
+to be implemented on systems that do not have the
+.I /proc
+filesystem mounted.
+.SH SEE ALSO
+.BR execve (2),
+.BR fexecve (3)
--
2.1.0.rc2.206.gedb03e5
^ permalink raw reply related
* Re: [Linux-NTFS-Dev] [PATCH v5 6/7] fs: pass iocb to generic_write_sync
From: Milosz Tanski @ 2014-11-06 16:14 UTC (permalink / raw)
To: Anton Altaparmakov
Cc: Linux Kernel Mailing List, linux-arch, linux-aio@kvack.org,
Volker Lendecke, Theodore Ts'o, linux-xfs, linux-cifs,
linux-ntfs-dev, Linux API, Christoph Hellwig, Tejun Heo,
Jeff Moyer, cluster-devel, Mel Gorman,
linux-fsdevel@vger.kernel.org, Michael Kerrisk, linux-ext4,
Christoph Hellwig, linux-btrfs, Al Viro
In-Reply-To: <C2D0BFF1-14C7-47C0-A24D-0F54809EF5D0@cam.ac.uk>
On Thu, Nov 6, 2014 at 5:52 AM, Anton Altaparmakov <aia21@cam.ac.uk> wrote:
> Hi,
>
>> On 5 Nov 2014, at 23:14, Milosz Tanski <milosz@adfin.com> wrote:
>>
>> From: Christoph Hellwig <hch@lst.de>
>>
>> Clean up the generic_write_sync by just passing an iocb and a bytes
>> written / negative errno argument. In addition to simplifying the
>> callers this also prepares for passing a per-operation O_DSYNC
>> flag. Two callers didn't quite fit that scheme:
>>
>> - dio_complete didn't both to update ki_pos as we don't need it
>> on a iocb that is about to be freed, so we had to add it. Additionally
>> it also synced out written data in the error case, which has been
>> changed to operate like the other callers.
>> - gfs2 also used generic_write_sync to implement a crude version
>> of fallocate. It has been switched to use an open coded variant
>> instead.
>>
>> Signed-off-by: Christoph Hellwig <hch@lst.de>
>> ---
>> fs/block_dev.c | 8 +-------
>> fs/btrfs/file.c | 7 ++-----
>> fs/cifs/file.c | 8 +-------
>> fs/direct-io.c | 8 ++------
>> fs/ext4/file.c | 8 +-------
>> fs/gfs2/file.c | 9 +++++++--
>> fs/ntfs/file.c | 8 ++------
>> fs/udf/file.c | 11 ++---------
>> fs/xfs/xfs_file.c | 8 +-------
>> include/linux/fs.h | 8 +-------
>> mm/filemap.c | 30 ++++++++++++++++++++----------
>> 11 files changed, 40 insertions(+), 73 deletions(-)
>>
>> diff --git a/fs/block_dev.c b/fs/block_dev.c
>> index cc9d411..c529b1c 100644
>> --- a/fs/block_dev.c
>> +++ b/fs/block_dev.c
>> @@ -1568,18 +1568,12 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
>> */
>> ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
>> {
>> - struct file *file = iocb->ki_filp;
>> struct blk_plug plug;
>> ssize_t ret;
>>
>> blk_start_plug(&plug);
>> ret = __generic_file_write_iter(iocb, from);
>> - if (ret > 0) {
>> - ssize_t err;
>> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
>> - if (err < 0)
>> - ret = err;
>> - }
>> + ret = generic_write_sync(iocb, ret);
>> blk_finish_plug(&plug);
>> return ret;
>> }
>> diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
>> index a18ceab..4f4a6f7 100644
>> --- a/fs/btrfs/file.c
>> +++ b/fs/btrfs/file.c
>> @@ -1820,11 +1820,8 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
>> */
>> BTRFS_I(inode)->last_trans = root->fs_info->generation + 1;
>> BTRFS_I(inode)->last_sub_trans = root->log_transid;
>> - if (num_written > 0) {
>> - err = generic_write_sync(file, pos, num_written);
>> - if (err < 0)
>> - num_written = err;
>> - }
>> +
>> + num_written = generic_write_sync(iocb, num_written);
>>
>> if (sync)
>> atomic_dec(&BTRFS_I(inode)->sync_writers);
>> diff --git a/fs/cifs/file.c b/fs/cifs/file.c
>> index c485afa..32359de 100644
>> --- a/fs/cifs/file.c
>> +++ b/fs/cifs/file.c
>> @@ -2706,13 +2706,7 @@ cifs_writev(struct kiocb *iocb, struct iov_iter *from)
>> rc = __generic_file_write_iter(iocb, from);
>> mutex_unlock(&inode->i_mutex);
>>
>> - if (rc > 0) {
>> - ssize_t err;
>> -
>> - err = generic_write_sync(file, iocb->ki_pos - rc, rc);
>> - if (err < 0)
>> - rc = err;
>> - }
>> + rc = generic_write_sync(iocb, rc);
>> } else {
>> mutex_unlock(&inode->i_mutex);
>> }
>> diff --git a/fs/direct-io.c b/fs/direct-io.c
>> index e181b6b..b72ac83 100644
>> --- a/fs/direct-io.c
>> +++ b/fs/direct-io.c
>> @@ -257,12 +257,8 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret,
>> inode_dio_done(dio->inode);
>> if (is_async) {
>> if (dio->rw & WRITE) {
>> - int err;
>> -
>> - err = generic_write_sync(dio->iocb->ki_filp, offset,
>> - transferred);
>> - if (err < 0 && ret > 0)
>> - ret = err;
>> + dio->iocb->ki_pos = offset + transferred;
>> + ret = generic_write_sync(dio->iocb, ret);
>> }
>>
>> aio_complete(dio->iocb, ret, 0);
>> diff --git a/fs/ext4/file.c b/fs/ext4/file.c
>> index aca7b24..79b000c 100644
>> --- a/fs/ext4/file.c
>> +++ b/fs/ext4/file.c
>> @@ -175,13 +175,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
>> ret = __generic_file_write_iter(iocb, from);
>> mutex_unlock(&inode->i_mutex);
>>
>> - if (ret > 0) {
>> - ssize_t err;
>> -
>> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
>> - if (err < 0)
>> - ret = err;
>> - }
>> + ret = generic_write_sync(iocb, ret);
>> if (o_direct)
>> blk_finish_plug(&plug);
>>
>> diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
>> index 80dd44d..3fafeca 100644
>> --- a/fs/gfs2/file.c
>> +++ b/fs/gfs2/file.c
>> @@ -895,8 +895,13 @@ retry:
>> gfs2_quota_unlock(ip);
>> }
>>
>> - if (error == 0)
>> - error = generic_write_sync(file, pos, count);
>> + if (error)
>> + goto out_unlock;
>> +
>> + if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host)) {
>> + error = vfs_fsync_range(file, pos, pos + count - 1,
>> + (file->f_flags & __O_SYNC) ? 0 : 1);
>> + }
>> goto out_unlock;
>>
>> out_trans_fail:
>> diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
>> index 643faa4..4f3d664 100644
>> --- a/fs/ntfs/file.c
>> +++ b/fs/ntfs/file.c
>> @@ -2127,12 +2127,8 @@ static ssize_t ntfs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
>> mutex_lock(&inode->i_mutex);
>> ret = ntfs_file_aio_write_nolock(iocb, iov, nr_segs, &iocb->ki_pos);
>> mutex_unlock(&inode->i_mutex);
>> - if (ret > 0) {
>> - int err = generic_write_sync(file, iocb->ki_pos - ret, ret);
>> - if (err < 0)
>> - ret = err;
>> - }
>> - return ret;
>> +
>> + return generic_write_sync(iocb, ret);
>> }
>>
>> /**
>> diff --git a/fs/udf/file.c b/fs/udf/file.c
>> index bb15771..1cdabd0 100644
>> --- a/fs/udf/file.c
>> +++ b/fs/udf/file.c
>> @@ -155,16 +155,9 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
>> retval = __generic_file_write_iter(iocb, from);
>> mutex_unlock(&inode->i_mutex);
>>
>> - if (retval > 0) {
>> - ssize_t err;
>> -
>> + if (retval > 0)
>> mark_inode_dirty(inode);
>> - err = generic_write_sync(file, iocb->ki_pos - retval, retval);
>> - if (err < 0)
>> - retval = err;
>> - }
>> -
>> - return retval;
>> + return generic_write_sync(iocb, retval);
>> }
>>
>> long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
>> index 0655915..a8cab66 100644
>> --- a/fs/xfs/xfs_file.c
>> +++ b/fs/xfs/xfs_file.c
>> @@ -792,14 +792,8 @@ xfs_file_write_iter(
>> ret = xfs_file_buffered_aio_write(iocb, from);
>>
>> if (ret > 0) {
>> - ssize_t err;
>> -
>> XFS_STATS_ADD(xs_write_bytes, ret);
>> -
>> - /* Handle various SYNC-type writes */
>> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
>> - if (err < 0)
>> - ret = err;
>> + ret = generic_write_sync(iocb, ret);
>> }
>> return ret;
>> }
>> diff --git a/include/linux/fs.h b/include/linux/fs.h
>> index eaebd99..7d0e116 100644
>> --- a/include/linux/fs.h
>> +++ b/include/linux/fs.h
>> @@ -2242,13 +2242,7 @@ extern int filemap_fdatawrite_range(struct address_space *mapping,
>> extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end,
>> int datasync);
>> extern int vfs_fsync(struct file *file, int datasync);
>> -static inline int generic_write_sync(struct file *file, loff_t pos, loff_t count)
>> -{
>> - if (!(file->f_flags & O_DSYNC) && !IS_SYNC(file->f_mapping->host))
>> - return 0;
>> - return vfs_fsync_range(file, pos, pos + count - 1,
>> - (file->f_flags & __O_SYNC) ? 0 : 1);
>> -}
>> +extern int generic_write_sync(struct kiocb *iocb, loff_t count);
>> extern void emergency_sync(void);
>> extern void emergency_remount(void);
>> #ifdef CONFIG_BLOCK
>> diff --git a/mm/filemap.c b/mm/filemap.c
>> index 09d3af3..6107058 100644
>> --- a/mm/filemap.c
>> +++ b/mm/filemap.c
>> @@ -2664,6 +2664,24 @@ out:
>> }
>> EXPORT_SYMBOL(__generic_file_write_iter);
>>
>> +int generic_write_sync(struct kiocb *iocb, loff_t count)
>> +{
>> + struct file *file = iocb->ki_filp;
>> +
>> + if (count > 0 &&
>> + ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host))) {
>> + bool fdatasync = !(file->f_flags & __O_SYNC);
>> + ssize_t ret = 0;
>
> That "= 0" is pointless. "ret" is overwritten unconditionally on the following line...
I have fixed this change; it will be in the next patch series / pull
request. The branch for the pull is at:
https://bitbucket.org/adfin/linux-fs.git read_call_6
>
> Other than that the NTFS bits are:
>
> Acked-by: Anton Altaparmakov <anton@tuxera.com>
>
> Best regards,
>
> Anton
>
>> +
>> + ret = vfs_fsync_range(file, iocb->ki_pos - count,
>> + iocb->ki_pos - 1, fdatasync);
>> + if (ret < 0)
>> + return ret;
>> + }
>> + return count;
>> +}
>> +EXPORT_SYMBOL(generic_write_sync);
>> +
>> /**
>> * generic_file_write_iter - write data to a file
>> * @iocb: IO state structure
>> @@ -2675,22 +2693,14 @@ EXPORT_SYMBOL(__generic_file_write_iter);
>> */
>> ssize_t generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
>> {
>> - struct file *file = iocb->ki_filp;
>> - struct inode *inode = file->f_mapping->host;
>> + struct inode *inode = iocb->ki_filp->f_mapping->host;
>> ssize_t ret;
>>
>> mutex_lock(&inode->i_mutex);
>> ret = __generic_file_write_iter(iocb, from);
>> mutex_unlock(&inode->i_mutex);
>>
>> - if (ret > 0) {
>> - ssize_t err;
>> -
>> - err = generic_write_sync(file, iocb->ki_pos - ret, ret);
>> - if (err < 0)
>> - ret = err;
>> - }
>> - return ret;
>> + return generic_write_sync(iocb, ret);
>> }
>> EXPORT_SYMBOL(generic_file_write_iter);
>
> --
> Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
> University of Cambridge Information Services, Roger Needham Building
> 7 JJ Thomson Avenue, Cambridge, CB3 0RB, UK
>
--
Milosz Tanski
CTO
16 East 34th Street, 15th floor
New York, NY 10016
p: 646-253-9055
e: milosz@adfin.com
--
To unsubscribe, send a message with 'unsubscribe linux-aio' in
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^ permalink raw reply
* Re: [PATCH v5 0/7] vfs: Non-blockling buffered fs read (page cache only)
From: Milosz Tanski @ 2014-11-06 16:16 UTC (permalink / raw)
To: LKML
Cc: Christoph Hellwig, linux-fsdevel@vger.kernel.org,
linux-aio@kvack.org, Mel Gorman, Volker Lendecke, Tejun Heo,
Jeff Moyer, Theodore Ts'o, Al Viro, Linux API,
Michael Kerrisk, linux-arch
In-Reply-To: <cover.1415220890.git.milosz@adfin.com>
The pull request for these changes is at:
https://bitbucket.org/adfin/linux-fs.git read_call_6
I've updated it so far with various Ack-by from different maintainers
(and a small stylistic fix).
On Wed, Nov 5, 2014 at 4:14 PM, Milosz Tanski <milosz@adfin.com> wrote:
> This patcheset introduces an ability to perform a non-blocking read from
> regular files in buffered IO mode. This works by only for those filesystems
> that have data in the page cache.
>
> It does this by introducing new syscalls new syscalls preadv2/pwritev2. These
> new syscalls behave like the network sendmsg, recvmsg syscalls that accept an
> extra flag argument (RWF_NONBLOCK).
>
> It's a very common patern today (samba, libuv, etc..) use a large threadpool to
> perform buffered IO operations. They submit the work form another thread
> that performs network IO and epoll or other threads that perform CPU work. This
> leads to increased latency for processing, esp. in the case of data that's
> already cached in the page cache.
>
> With the new interface the applications will now be able to fetch the data in
> their network / cpu bound thread(s) and only defer to a threadpool if it's not
> there. In our own application (VLDB) we've observed a decrease in latency for
> "fast" request by avoiding unnecessary queuing and having to swap out current
> tasks in IO bound work threads.
>
> Version 5 highlight:
> - XFS support for RWF_NONBLOCK. from Christoph.
> - RWF_DSYNC flag and support for pwritev2, from Christoph.
> - Implemented compat syscalls, per. Jeff.
> - Missing nfs, ceph changes from older patchset.
>
> Version 4 highlight:
> - Updated for 3.18-rc1.
> - Performance data from our application.
> - First stab at man page with Jeff's help. Patch is in-reply to.
>
> RFC Version 3 highlights:
> - Down to 2 syscalls from 4; can user fp or argument position.
> - RWF_NONBLOCK value flag is not the same O_NONBLOCK, per Jeff.
>
> RFC Version 2 highlights:
> - Put the flags argument into kiocb (less noise), per. Al Viro
> - O_DIRECT checking early in the process, per. Jeff Moyer
> - Resolved duplicate (c&p) code in syscall code, per. Jeff
> - Included perf data in thread cover letter, per. Jeff
> - Created a new flag (not O_NONBLOCK) for readv2, perf Jeff
>
>
> Some perf data generated using fio comparing the posix aio engine to a version
> of the posix AIO engine that attempts to performs "fast" reads before
> submitting the operations to the queue. This workflow is on ext4 partition on
> raid0 (test / build-rig.) Simulating our database access patern workload using
> 16kb read accesses. Our database uses a home-spun posix aio like queue (samba
> does the same thing.)
>
> f1: ~73% rand read over mostly cached data (zipf med-size dataset)
> f2: ~18% rand read over mostly un-cached data (uniform large-dataset)
> f3: ~9% seq-read over large dataset
>
> before:
>
> f1:
> bw (KB /s): min= 11, max= 9088, per=0.56%, avg=969.54, stdev=827.99
> lat (msec) : 50=0.01%, 100=1.06%, 250=5.88%, 500=4.08%, 750=12.48%
> lat (msec) : 1000=17.27%, 2000=49.86%, >=2000=9.42%
> f2:
> bw (KB /s): min= 2, max= 1882, per=0.16%, avg=273.28, stdev=220.26
> lat (msec) : 250=5.65%, 500=3.31%, 750=15.64%, 1000=24.59%, 2000=46.56%
> lat (msec) : >=2000=4.33%
> f3:
> bw (KB /s): min= 0, max=265568, per=99.95%, avg=174575.10,
> stdev=34526.89
> lat (usec) : 2=0.01%, 4=0.01%, 10=0.02%, 20=0.27%, 50=10.82%
> lat (usec) : 100=50.34%, 250=5.05%, 500=7.12%, 750=6.60%, 1000=4.55%
> lat (msec) : 2=8.73%, 4=3.49%, 10=1.83%, 20=0.89%, 50=0.22%
> lat (msec) : 100=0.05%, 250=0.02%, 500=0.01%
> total:
> READ: io=102365MB, aggrb=174669KB/s, minb=240KB/s, maxb=173599KB/s,
> mint=600001msec, maxt=600113msec
>
> after (with fast read using preadv2 before submit):
>
> f1:
> bw (KB /s): min= 3, max=14897, per=1.28%, avg=2276.69, stdev=2930.39
> lat (usec) : 2=70.63%, 4=0.01%
> lat (msec) : 250=0.20%, 500=2.26%, 750=1.18%, 2000=0.22%, >=2000=25.53%
> f2:
> bw (KB /s): min= 2, max= 2362, per=0.14%, avg=249.83, stdev=222.00
> lat (msec) : 250=6.35%, 500=1.78%, 750=9.29%, 1000=20.49%, 2000=52.18%
> lat (msec) : >=2000=9.99%
> f3:
> bw (KB /s): min= 1, max=245448, per=100.00%, avg=177366.50,
> stdev=35995.60
> lat (usec) : 2=64.04%, 4=0.01%, 10=0.01%, 20=0.06%, 50=0.43%
> lat (usec) : 100=0.20%, 250=1.27%, 500=2.93%, 750=3.93%, 1000=7.35%
> lat (msec) : 2=14.27%, 4=2.88%, 10=1.54%, 20=0.81%, 50=0.22%
> lat (msec) : 100=0.05%, 250=0.02%
> total:
> READ: io=103941MB, aggrb=177339KB/s, minb=213KB/s, maxb=176375KB/s,
> mint=600020msec, maxt=600178msec
>
> Interpreting the results you can see total bandwidth stays the same but overall
> request latency is decreased in f1 (random, mostly cached) and f3 (sequential)
> workloads. There is a slight bump in latency for since it's random data that's
> unlikely to be cached but we're always trying "fast read".
>
> In our application we have starting keeping track of "fast read" hits/misses
> and for files / requests that have a lot hit ratio we don't do "fast reads"
> mostly getting rid of extra latency in the uncached cases. In our real world
> work load we were able to reduce average response time by 20 to 30% (depends
> on amount of IO done by request).
>
> I've performed other benchmarks and I have no observed any perf regressions in
> any of the normal (old) code paths.
>
> I have co-developed these changes with Christoph Hellwig.
>
> Christoph Hellwig (3):
> xfs: add RWF_NONBLOCK support
> fs: pass iocb to generic_write_sync
> fs: add a flag for per-operation O_DSYNC semantics
>
> Milosz Tanski (4):
> vfs: Prepare for adding a new preadv/pwritev with user flags.
> vfs: Define new syscalls preadv2,pwritev2
> x86: wire up preadv2 and pwritev2
> vfs: RWF_NONBLOCK flag for preadv2
>
> arch/x86/syscalls/syscall_32.tbl | 2 +
> arch/x86/syscalls/syscall_64.tbl | 2 +
> drivers/target/target_core_file.c | 6 +-
> fs/block_dev.c | 8 +-
> fs/btrfs/file.c | 7 +-
> fs/ceph/file.c | 6 +-
> fs/cifs/file.c | 14 +--
> fs/direct-io.c | 8 +-
> fs/ext4/file.c | 8 +-
> fs/fuse/file.c | 2 +
> fs/gfs2/file.c | 9 +-
> fs/nfs/file.c | 15 ++-
> fs/nfsd/vfs.c | 4 +-
> fs/ntfs/file.c | 8 +-
> fs/ocfs2/file.c | 12 +-
> fs/pipe.c | 3 +-
> fs/read_write.c | 239 +++++++++++++++++++++++++++++---------
> fs/splice.c | 2 +-
> fs/udf/file.c | 11 +-
> fs/xfs/xfs_file.c | 36 ++++--
> include/linux/aio.h | 2 +
> include/linux/compat.h | 6 +
> include/linux/fs.h | 16 ++-
> include/linux/syscalls.h | 6 +
> include/uapi/asm-generic/unistd.h | 6 +-
> mm/filemap.c | 55 +++++++--
> mm/shmem.c | 4 +
> 27 files changed, 346 insertions(+), 151 deletions(-)
>
> --
> 1.9.1
>
--
Milosz Tanski
CTO
16 East 34th Street, 15th floor
New York, NY 10016
p: 646-253-9055
e: milosz@adfin.com
--
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^ permalink raw reply
* Re: [RFC PATCH 0/1] arm64: Fix /proc/cpuinfo
From: Catalin Marinas @ 2014-11-06 16:43 UTC (permalink / raw)
To: Mark Rutland
Cc: cross-distro-cunTk1MwBs8s++Sfvej+rw@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Serban Constantinescu, Will Deacon,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
ghackmann-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
In-Reply-To: <1414159000-27059-1-git-send-email-mark.rutland-5wv7dgnIgG8@public.gmane.org>
On Fri, Oct 24, 2014 at 02:56:39PM +0100, Mark Rutland wrote:
> Currently, the arm64 /proc/cpuinfo format differs from that of arm, in a
> manner which prevents some otherwise portable applications from
> functioning as expected. Specifically, the "Features" line describes the
> 64-bit hwcaps exclusive of the 32-bit hwcaps, which causes issues for
> certain applications which attempt to parse /proc/cpuinfo to detect
> features rather than directly using the hwcaps exposed via auxval.
>
> Additionally, the arm64 /proc/cpuinfo format only provides identifying
> information for a single CPU (unlike 32-bit), which is problematic for
> systems with heterogeneous CPUs (i.e. big.LITTLE).
>
> This patch attempts to solve both issues.
I'm perfectly fine with the heterogeneous CPUs part.
> I believe the contentious part
> is what to do with the Features line, and for that there are a number of
> possibilities:
>
> [a] Only print the 64-bit hwcaps
>
> This would match our current behaviour. However certain 32-bit
> applications will not detect CPU features correctly, and could fail
> to launch. The appropriate hwcaps are available in auxval, but this
> will not be of help to existing binaries.
>
> [b] Append the 64-bit and 32-bit hwcaps
>
> This would allow for a consistent format. However, some
> human-readable hwcap names have been reused for analogous
> instruction set features (e.g. "aes") despite 32-bit and 64-bit
> instruction set support being largely unrelated per the
> architecture. This could lead to applications mis-detecting
> instruction set support on some CPUs in future, and may be
> misleading to a casual reader.
The only overlap between 32 and 64-bit is aes, pmull, sha1, sha2, crc32.
An ARMv8 CPU implementing both AArch32 and AArch64 will likely support
these extensions in both modes. However, "likely" is not enough and we
need to get some confirmation from the architecture people. If that's
the case, point [b] is not too bad.
> [c] Print different hwcaps for compat tasks
>
> This would allow for 32-bit and 64-bit applications to function
> correctly. Having the format differ depending on the instruction set
> of the application reading /proc/cpuinfo may be misleading in some
> cases (e.g. a human using a 32-bit cat to read /proc/cpuinfo on a
> 64-bit system).
Long time ago we decided that "uname -m" would report "aarch64"
independent of whether it is compat or not. That's the case for x86 as
well, you need PER_LINUX32 to report the actual compat UTS name.
> [d] Print different hwcaps dependent on the personality.
>
> This would allow for 32-bit and 64-bit applications to function
> correctly, but for some 32-bit applications the personality would
> need to be set explicitly by the user.
Which makes this option actually in line with the uname -m behaviour. My
vote goes for [d] with option [b] as a close alternative.
> [1] arm, v3.17, Versatile Express A15x2 A7x3 coretile
> Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm
[...]
> [2] arm64, v3.17, Juno platform
> Features : fp asimd evtstrm aes pmull sha1 sha2 crc32
As an exercise, I'm trying to see what option [b] would look like when
CONFIG_COMPAT is enabled:
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae
The duplicate strings would only be listed once (evtstrm, aes, pmull,
sha1, sha2, crc32). New AArch64 features that we may expect to be
optional on AArch32 could be prefixed with "a64". If they are missing
entirely from AArch32, (like asimd), no need for the prefix.
The advantage is that we don't need to check the personality but we have
to assume that scripts would not search for substrings (sane people
shouldn't do this anyway as the Features string can always be extended).
--
Catalin
^ permalink raw reply
* [PATCH v4 0/3] perf: User/kernel time correlation and event generation
From: Pawel Moll @ 2014-11-06 16:51 UTC (permalink / raw)
To: Richard Cochran, Steven Rostedt, Ingo Molnar, Peter Zijlstra,
Paul Mackerras, Arnaldo Carvalho de Melo, John Stultz,
Masami Hiramatsu, Christopher Covington, Namhyung Kim,
David Ahern, Thomas Gleixner, Tomeu Vizoso
Cc: linux-kernel, linux-api, Pawel Moll
This is a second version of the post-LPC series. The changes are limited
to the first patch, adding a backward-compatibility kernel parameter.
The v3 cover letter:
I've organised a session on the subject during the tracing minisummit
at LPC 2014 in Dusseldorf. Notes taken from the discussion taken by
Steven Rostedt (thanks Steve!)
http://www.linuxplumbersconf.org/2014/wp-content/uploads/2014/10/LPC2014_Tracing.txt
The following three patches address three main topics. They are pretty
much orthogonal and (subject to small and obvious modifications) could
be applied independently from each other.
An executive summary of both discussion and the patches:
1. User/kernel perf timestamps correlation
Thomas suggested that, instead of jumping through loops of correlation,
perf should simply generate monotonic clock timestamps, instead of
using sched clock. Peter and I pointed out that Ingo didn't like this
idea as monotonic can be slow, but apparently the cases when it is are
irrelevant. Thomas offered to fly to Budapest to physically convince
Ingo - I hope it won't be necessary and he will be able to achieve
this here, on mailing lists :-)
Setting aside potential performance problems, it would be a really
great solution, unifying all trace systems (perf, ftrace and LTTng)
in this respect. I'm more than happy to work on potential improvements
in the are of monotonic clock if it was to help the cause.
If it is a definite no-go, we still have the third patch, allowing post-
capture correlation based on synchronisation events.
2. User event generation
Everyone present agreed that it would be a very-nice-to-have feature.
There was some discussion about implementation details, so I welcome
feedback and comments regarding my take on the matter.
3. Correlation with external timestamps
This is a new issue, which surfaced recently while I was working on
hardware trace infrastructure. It can timestamp trace packets, but is
using yet another, completely different time source to do this.
Thomas suggested solution which gets down to my original proposal for
sched/monotonic clock correlation - an additional sample type so events
can be "double stamped" using different clock sources providing
synchronisation points for later time approximation. I've just extended
the implementation with configuration value to select the clock source.
If the first patch (making perf timestamps monotonic) gets accepted,
there will be no immediate need for this one, but I'd like to gain some
feedback anyway.
That's all for this series. Previous versions:
- RFC: http://www.spinics.net/lists/kernel/msg1824419.html
- v1: http://thread.gmane.org/gmane.linux.kernel/1790231
- v2: http://thread.gmane.org/gmane.linux.kernel/1793272
- v3: http://thread.gmane.org/gmane.linux.kernel.api/5681
Pawel Moll (3):
perf: Use monotonic clock as a source for timestamps
perf: Userspace event
perf: Sample additional clock value
Documentation/kernel-parameters.txt | 9 +++
include/linux/perf_event.h | 6 ++
include/uapi/linux/perf_event.h | 37 +++++++++-
include/uapi/linux/prctl.h | 10 +++
kernel/events/core.c | 138 ++++++++++++++++++++++++++++++++++++
kernel/sys.c | 5 ++
6 files changed, 203 insertions(+), 2 deletions(-)
--
2.1.0
^ permalink raw reply
* [PATCH v4 1/3] perf: Use monotonic clock as a source for timestamps
From: Pawel Moll @ 2014-11-06 16:51 UTC (permalink / raw)
To: Richard Cochran, Steven Rostedt, Ingo Molnar, Peter Zijlstra,
Paul Mackerras, Arnaldo Carvalho de Melo, John Stultz,
Masami Hiramatsu, Christopher Covington, Namhyung Kim,
David Ahern, Thomas Gleixner, Tomeu Vizoso
Cc: linux-kernel, linux-api, Pawel Moll
In-Reply-To: <1415292718-19785-1-git-send-email-pawel.moll@arm.com>
Until now, perf framework never defined the meaning of the timestamps
captured as PERF_SAMPLE_TIME sample type. The values were obtaining
from local (sched) clock, which is unavailable in userspace. This made
it impossible to correlate perf data with any other events. Other
tracing solutions have the source configurable (ftrace) or just share
a common time domain between kernel and userspace (LTTng).
Follow the trend by using monotonic clock, which is readily available
as POSIX CLOCK_MONOTONIC.
Also add a sysctl "perf_sample_time_clk_id" attribute which can be used
by the user to obtain the clk_id to be used with POSIX clock API (eg.
clock_gettime()) to obtain a time value comparable with perf samples.
Old behaviour can be restored by using "perf_use_local_clock" kernel
parameter.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
---
Ingo, I remember your comments about this approach in the past, but
during discussions at LPC Thomas was convinced that it's the right
thing to do - see cover letter for the series...
Changes since v3:
- Added "perf_use_lock_clock" parameter...
- ... and creating the sysctl value only when it's not defined (turned
out that negative clk_ids are not invalid - they are used to describe
dynamic clocks)
- Had to keep sysctl_perf_sample_time_clk_id non-const, because struct
ctl_table.data is non-const
Documentation/kernel-parameters.txt | 9 +++++++++
kernel/events/core.c | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 46 insertions(+)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 4c81a86..8ead8d8 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -91,6 +91,7 @@ parameter is applicable:
NUMA NUMA support is enabled.
NFS Appropriate NFS support is enabled.
OSS OSS sound support is enabled.
+ PERF Performance events and counters support is enabled.
PV_OPS A paravirtualized kernel is enabled.
PARIDE The ParIDE (parallel port IDE) subsystem is enabled.
PARISC The PA-RISC architecture is enabled.
@@ -2763,6 +2764,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
allocator. This parameter is primarily for debugging
and performance comparison.
+ perf_use_local_clock
+ [PERF]
+ Use local_clock() as a source for perf timestamps
+ generation. This was be the default behaviour and
+ this parameter can be used to maintain backward
+ compatibility or on older hardware with expensive
+ monotonic clock source.
+
pf. [PARIDE]
See Documentation/blockdev/paride.txt.
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 2b02c9f..5d0aa03 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -42,6 +42,7 @@
#include <linux/module.h>
#include <linux/mman.h>
#include <linux/compat.h>
+#include <linux/sysctl.h>
#include "internal.h"
@@ -322,8 +323,41 @@ extern __weak const char *perf_pmu_name(void)
return "pmu";
}
+static bool perf_use_local_clock;
+static int __init perf_use_local_clock_setup(char *__unused)
+{
+ perf_use_local_clock = true;
+ return 1;
+}
+__setup("perf_use_local_clock", perf_use_local_clock_setup);
+
+static int sysctl_perf_sample_time_clk_id = CLOCK_MONOTONIC;
+
+static struct ctl_table perf_sample_time_kern_table[] = {
+ {
+ .procname = "perf_sample_time_clk_id",
+ .data = &sysctl_perf_sample_time_clk_id,
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ },
+ {}
+};
+
+static struct ctl_table perf_sample_time_root_table[] = {
+ {
+ .procname = "kernel",
+ .mode = 0555,
+ .child = perf_sample_time_kern_table,
+ },
+ {}
+};
+
static inline u64 perf_clock(void)
{
+ if (likely(!perf_use_local_clock))
+ return ktime_get_mono_fast_ns();
+
return local_clock();
}
@@ -8230,6 +8264,9 @@ void __init perf_event_init(void)
*/
BUILD_BUG_ON((offsetof(struct perf_event_mmap_page, data_head))
!= 1024);
+
+ if (!perf_use_local_clock)
+ register_sysctl_table(perf_sample_time_root_table);
}
static int __init perf_event_sysfs_init(void)
--
2.1.0
^ permalink raw reply related
* [PATCH v4 2/3] perf: Userspace event
From: Pawel Moll @ 2014-11-06 16:51 UTC (permalink / raw)
To: Richard Cochran, Steven Rostedt, Ingo Molnar, Peter Zijlstra,
Paul Mackerras, Arnaldo Carvalho de Melo, John Stultz,
Masami Hiramatsu, Christopher Covington, Namhyung Kim,
David Ahern, Thomas Gleixner, Tomeu Vizoso
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA,
linux-api-u79uwXL29TY76Z2rM5mHXA, Pawel Moll
In-Reply-To: <1415292718-19785-1-git-send-email-pawel.moll-5wv7dgnIgG8@public.gmane.org>
This patch adds a PR_TASK_PERF_UEVENT prctl call which can be used by
any process to inject custom data into perf data stream as a new
PERF_RECORD_UEVENT record, if such process is being observed or if it
is running on a CPU being observed by the perf framework.
The prctl call takes the following arguments:
prctl(PR_TASK_PERF_UEVENT, type, size, data, flags);
- type: a number meaning to describe content of the following data.
Kernel does not pay attention to it and merely passes it further in
the perf data, therefore its use must be agreed between the events
producer (the process being observed) and the consumer (performance
analysis tool). The perf userspace tool will contain a repository of
"well known" types and reference implementation of their decoders.
- size: Length in bytes of the data.
- data: Pointer to the data.
- flags: Reserved for future use. Always pass zero.
Perf context that are supposed to receive events generated with the
prctl above must be opened with perf_event_attr.uevent set to 1. The
PERF_RECORD_UEVENT records consist of a standard perf event header,
32-bit type value, 32-bit data size and the data itself, followed by
padding to align the overall record size to 8 bytes and optional,
standard sample_id field.
Example use cases:
- "perf_printf" like mechanism to add logging messages to perf data;
in the simplest case it can be just
prctl(PR_TASK_PERF_UEVENT, 0, 8, "Message", 0);
- synchronisation of performance data generated in user space with the
perf stream coming from the kernel. For example, the marker can be
inserted by a JIT engine after it generated portion of the code, but
before the code is executed for the first time, allowing the
post-processor to pick the correct debugging information.
Signed-off-by: Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>
---
Changes since v3:
- none
include/linux/perf_event.h | 4 +++
include/uapi/linux/perf_event.h | 23 ++++++++++++-
include/uapi/linux/prctl.h | 10 ++++++
kernel/events/core.c | 71 +++++++++++++++++++++++++++++++++++++++++
kernel/sys.c | 5 +++
5 files changed, 112 insertions(+), 1 deletion(-)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 893a0d0..680767d 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -721,6 +721,8 @@ extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks
extern void perf_event_exec(void);
extern void perf_event_comm(struct task_struct *tsk, bool exec);
extern void perf_event_fork(struct task_struct *tsk);
+extern int perf_uevent(struct task_struct *tsk, u32 type, u32 size,
+ const char __user *data);
/* Callchains */
DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry);
@@ -829,6 +831,8 @@ static inline void perf_event_mmap(struct vm_area_struct *vma) { }
static inline void perf_event_exec(void) { }
static inline void perf_event_comm(struct task_struct *tsk, bool exec) { }
static inline void perf_event_fork(struct task_struct *tsk) { }
+static inline int perf_uevent(struct task_struct *tsk, u32 type, u32 size,
+ const char __user *data) { return -1; };
static inline void perf_event_init(void) { }
static inline int perf_swevent_get_recursion_context(void) { return -1; }
static inline void perf_swevent_put_recursion_context(int rctx) { }
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 9d84540..9a64eb1 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -303,7 +303,8 @@ struct perf_event_attr {
exclude_callchain_user : 1, /* exclude user callchains */
mmap2 : 1, /* include mmap with inode data */
comm_exec : 1, /* flag comm events that are due to an exec */
- __reserved_1 : 39;
+ uevents : 1, /* allow uevents into the buffer */
+ __reserved_1 : 38;
union {
__u32 wakeup_events; /* wakeup every n events */
@@ -712,6 +713,26 @@ enum perf_event_type {
*/
PERF_RECORD_MMAP2 = 10,
+ /*
+ * Data in userspace event record is transparent for the kernel
+ *
+ * Userspace perf tool code maintains a list of known types with
+ * reference implementations of parsers for the data field.
+ *
+ * Overall size of the record (including type and size fields)
+ * is always aligned to 8 bytes by adding padding after the data.
+ *
+ * struct {
+ * struct perf_event_header header;
+ * u32 type;
+ * u32 size;
+ * char data[size];
+ * char __padding[-size & 7];
+ * struct sample_id sample_id;
+ * };
+ */
+ PERF_RECORD_UEVENT = 11,
+
PERF_RECORD_MAX, /* non-ABI */
};
diff --git a/include/uapi/linux/prctl.h b/include/uapi/linux/prctl.h
index 513df75..2a6852f 100644
--- a/include/uapi/linux/prctl.h
+++ b/include/uapi/linux/prctl.h
@@ -179,4 +179,14 @@ struct prctl_mm_map {
#define PR_SET_THP_DISABLE 41
#define PR_GET_THP_DISABLE 42
+/*
+ * Perf userspace event generation
+ *
+ * second argument: event type
+ * third argument: data size
+ * fourth argument: pointer to data
+ * fifth argument: flags (currently unused, pass 0)
+ */
+#define PR_TASK_PERF_UEVENT 43
+
#endif /* _LINUX_PRCTL_H */
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 5d0aa03..9a2d082 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -5597,6 +5597,77 @@ static void perf_log_throttle(struct perf_event *event, int enable)
}
/*
+ * Userspace-generated event
+ */
+
+struct perf_uevent {
+ struct perf_event_header header;
+ u32 type;
+ u32 size;
+ u8 data[0];
+};
+
+static void perf_uevent_output(struct perf_event *event, void *data)
+{
+ struct perf_uevent *uevent = data;
+ struct perf_output_handle handle;
+ struct perf_sample_data sample;
+ int size = uevent->header.size;
+
+ if (!event->attr.uevents)
+ return;
+
+ perf_event_header__init_id(&uevent->header, &sample, event);
+
+ if (perf_output_begin(&handle, event, uevent->header.size) != 0)
+ goto out;
+ perf_output_put(&handle, uevent->header);
+ perf_output_put(&handle, uevent->type);
+ perf_output_put(&handle, uevent->size);
+ __output_copy(&handle, uevent->data, uevent->size);
+
+ /* Padding to align overall data size to 8 bytes */
+ perf_output_skip(&handle, -uevent->size & (sizeof(u64) - 1));
+
+ perf_event__output_id_sample(event, &handle, &sample);
+
+ perf_output_end(&handle);
+out:
+ uevent->header.size = size;
+}
+
+int perf_uevent(struct task_struct *tsk, u32 type, u32 size,
+ const char __user *data)
+{
+ struct perf_uevent *uevent;
+
+ /* Need some reasonable limit */
+ if (size > PAGE_SIZE)
+ return -E2BIG;
+
+ uevent = kmalloc(sizeof(*uevent) + size, GFP_KERNEL);
+ if (!uevent)
+ return -ENOMEM;
+
+ uevent->header.type = PERF_RECORD_UEVENT;
+ uevent->header.size = sizeof(*uevent) + ALIGN(size, sizeof(u64));
+
+ uevent->type = type;
+ uevent->size = size;
+ if (copy_from_user(uevent->data, data, size)) {
+ kfree(uevent);
+ return -EFAULT;
+ }
+
+ perf_event_aux(perf_uevent_output, uevent, NULL);
+
+ kfree(uevent);
+
+ return 0;
+}
+
+
+/*
* Generic event overflow handling, sampling.
*/
diff --git a/kernel/sys.c b/kernel/sys.c
index 1eaa2f0..1c83677 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2121,6 +2121,11 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
case PR_TASK_PERF_EVENTS_ENABLE:
error = perf_event_task_enable();
break;
+ case PR_TASK_PERF_UEVENT:
+ if (arg5 != 0)
+ return -EINVAL;
+ error = perf_uevent(me, arg2, arg3, (char __user *)arg4);
+ break;
case PR_GET_TIMERSLACK:
error = current->timer_slack_ns;
break;
--
2.1.0
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