[patch 16/17] mpt fusion: convert to seq_file

akpm
2009-12-08T22:09:39Z

From: Alexey Dobriyan <adobriyan@gmail.com>

Convert everything except ->proc_info() stuff, it is done within separate
->proc_info path series.

Problem with ->read_proc et al is described here commit
786d7e1612f0b0adb6046f19b906609e4fe8b1ba "Fix rmmod/read/write races in
/proc entries"

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Eric Moore <Eric.Moore@lsi.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

drivers/message/fusion/mptbase.c | 236 ++++++++++++++---------------
drivers/message/fusion/mptbase.h | 25 ---
2 files changed, 119 insertions(+), 142 deletions(-)

diff -puN drivers/message/fusion/mptbase.c~mpt-fusion-convert-to-seq_file drivers/message/fusion/mptbase.c
--- a/drivers/message/fusion/mptbase.c~mpt-fusion-convert-to-seq_file
+++ a/drivers/message/fusion/mptbase.c
@@ -50,6 +50,7 @@
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/init.h>
+#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/pci.h>
@@ -197,12 +198,9 @@ static int mpt_host_page_access_control(
static int mpt_host_page_alloc(MPT_ADAPTER *ioc, pIOCInit_t ioc_init);

#ifdef CONFIG_PROC_FS
-static int procmpt_summary_read(char *buf, char **start, off_t offset,
- int request, int *eof, void *data);
-static int procmpt_version_read(char *buf, char **start, off_t offset,
- int request, int *eof, void *data);
-static int procmpt_iocinfo_read(char *buf, char **start, off_t offset,
- int request, int *eof, void *data);
+static const struct file_operations mpt_summary_proc_fops;
+static const struct file_operations mpt_version_proc_fops;
+static const struct file_operations mpt_iocinfo_proc_fops;
#endif
static void mpt_get_fw_exp_ver(char *buf, MPT_ADAPTER *ioc);

@@ -1717,7 +1715,7 @@ mpt_attach(struct pci_dev *pdev, const s
u8 pcixcmd;
static int mpt_ids = 0;
#ifdef CONFIG_PROC_FS
- struct proc_dir_entry *dent, *ent;
+ struct proc_dir_entry *dent;
#endif

ioc = kzalloc(sizeof(MPT_ADAPTER), GFP_ATOMIC);
@@ -1970,16 +1968,8 @@ mpt_attach(struct pci_dev *pdev, const s
*/
dent = proc_mkdir(ioc->name, mpt_proc_root_dir);
if (dent) {
- ent = create_proc_entry("info", S_IFREG|S_IRUGO, dent);
- if (ent) {
- ent->read_proc = procmpt_iocinfo_read;
- ent->data = ioc;
- }
- ent = create_proc_entry("summary", S_IFREG|S_IRUGO, dent);
- if (ent) {
- ent->read_proc = procmpt_summary_read;
- ent->data = ioc;
- }
+ proc_create_data("info", S_IRUGO, dent, &mpt_iocinfo_proc_fops, ioc);
+ proc_create_data("summary", S_IRUGO, dent, &mpt_summary_proc_fops, ioc);
}
#endif

@@ -6528,20 +6518,12 @@ mpt_ioc_reset(MPT_ADAPTER *ioc, int rese
static int
procmpt_create(void)
{
- struct proc_dir_entry *ent;
-
mpt_proc_root_dir = proc_mkdir(MPT_PROCFS_MPTBASEDIR, NULL);
if (mpt_proc_root_dir == NULL)
return -ENOTDIR;

- ent = create_proc_entry("summary", S_IFREG|S_IRUGO, mpt_proc_root_dir);
- if (ent)
- ent->read_proc = procmpt_summary_read;
-
- ent = create_proc_entry("version", S_IFREG|S_IRUGO, mpt_proc_root_dir);
- if (ent)
- ent->read_proc = procmpt_version_read;
-
+ proc_create("summary", S_IRUGO, mpt_proc_root_dir, &mpt_summary_proc_fops);
+ proc_create("version", S_IRUGO, mpt_proc_root_dir, &mpt_version_proc_fops);
return 0;
}

@@ -6561,70 +6543,46 @@ procmpt_destroy(void)

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
- * procmpt_summary_read - Handle read request of a summary file
- * @buf: Pointer to area to write information
- * @start: Pointer to start pointer
- * @offset: Offset to start writing
- * @request: Amount of read data requested
- * @eof: Pointer to EOF integer
- * @data: Pointer
- *
* Handles read request from /proc/mpt/summary or /proc/mpt/iocN/summary.
- * Returns number of characters written to process performing the read.
*/
-static int
-procmpt_summary_read(char *buf, char **start, off_t offset, int request, int *eof, void *data)
-{
- MPT_ADAPTER *ioc;
- char *out = buf;
- int len;
+static void seq_mpt_print_ioc_summary(MPT_ADAPTER *ioc, struct seq_file *m, int showlan);

- if (data) {
- int more = 0;
-
- ioc = data;
- mpt_print_ioc_summary(ioc, out, &more, 0, 1);
+static int mpt_summary_proc_show(struct seq_file *m, void *v)
+{
+ MPT_ADAPTER *ioc = m->private;

- out += more;
+ if (ioc) {
+ seq_mpt_print_ioc_summary(ioc, m, 1);
} else {
list_for_each_entry(ioc, &ioc_list, list) {
- int more = 0;
-
- mpt_print_ioc_summary(ioc, out, &more, 0, 1);
-
- out += more;
- if ((out-buf) >= request)
- break;
+ seq_mpt_print_ioc_summary(ioc, m, 1);
}
}

- len = out - buf;
+ return 0;
+}

- MPT_PROC_READ_RETURN(buf,start,offset,request,eof,len);
+static int mpt_summary_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mpt_summary_proc_show, PDE(inode)->data);
}

-/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
-/**
- * procmpt_version_read - Handle read request from /proc/mpt/version.
- * @buf: Pointer to area to write information
- * @start: Pointer to start pointer
- * @offset: Offset to start writing
- * @request: Amount of read data requested
- * @eof: Pointer to EOF integer
- * @data: Pointer
- *
- * Returns number of characters written to process performing the read.
- */
-static int
-procmpt_version_read(char *buf, char **start, off_t offset, int request, int *eof, void *data)
+static const struct file_operations mpt_summary_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = mpt_summary_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int mpt_version_proc_show(struct seq_file *m, void *v)
{
u8 cb_idx;
int scsi, fc, sas, lan, ctl, targ, dmp;
char *drvname;
- int len;

- len = sprintf(buf, "%s-%s\n", "mptlinux", MPT_LINUX_VERSION_COMMON);
- len += sprintf(buf+len, " Fusion MPT base driver\n");
+ seq_printf(m, "%s-%s\n", "mptlinux", MPT_LINUX_VERSION_COMMON);
+ seq_printf(m, " Fusion MPT base driver\n");

scsi = fc = sas = lan = ctl = targ = dmp = 0;
for (cb_idx = MPT_MAX_PROTOCOL_DRIVERS-1; cb_idx; cb_idx--) {
@@ -6652,98 +6610,97 @@ procmpt_version_read(char *buf, char **s
}

if (drvname)
- len += sprintf(buf+len, " Fusion MPT %s driver\n", drvname);
+ seq_printf(m, " Fusion MPT %s driver\n", drvname);
}
}

- MPT_PROC_READ_RETURN(buf,start,offset,request,eof,len);
+ return 0;
}

-/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
-/**
- * procmpt_iocinfo_read - Handle read request from /proc/mpt/iocN/info.
- * @buf: Pointer to area to write information
- * @start: Pointer to start pointer
- * @offset: Offset to start writing
- * @request: Amount of read data requested
- * @eof: Pointer to EOF integer
- * @data: Pointer
- *
- * Returns number of characters written to process performing the read.
- */
-static int
-procmpt_iocinfo_read(char *buf, char **start, off_t offset, int request, int *eof, void *data)
+static int mpt_version_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mpt_version_proc_show, NULL);
+}
+
+static const struct file_operations mpt_version_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = mpt_version_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int mpt_iocinfo_proc_show(struct seq_file *m, void *v)
{
- MPT_ADAPTER *ioc = data;
- int len;
+ MPT_ADAPTER *ioc = m->private;
char expVer[32];
int sz;
int p;

mpt_get_fw_exp_ver(expVer, ioc);

- len = sprintf(buf, "%s:", ioc->name);
+ seq_printf(m, "%s:", ioc->name);
if (ioc->facts.Flags & MPI_IOCFACTS_FLAGS_FW_DOWNLOAD_BOOT)
- len += sprintf(buf+len, " (f/w download boot flag set)");
+ seq_printf(m, " (f/w download boot flag set)");
// if (ioc->facts.IOCExceptions & MPI_IOCFACTS_EXCEPT_CONFIG_CHECKSUM_FAIL)
-// len += sprintf(buf+len, " CONFIG_CHECKSUM_FAIL!");
+// seq_printf(m, " CONFIG_CHECKSUM_FAIL!");

- len += sprintf(buf+len, "\n ProductID = 0x%04x (%s)\n",
+ seq_printf(m, "\n ProductID = 0x%04x (%s)\n",
ioc->facts.ProductID,
ioc->prod_name);
- len += sprintf(buf+len, " FWVersion = 0x%08x%s", ioc->facts.FWVersion.Word, expVer);
+ seq_printf(m, " FWVersion = 0x%08x%s", ioc->facts.FWVersion.Word, expVer);
if (ioc->facts.FWImageSize)
- len += sprintf(buf+len, " (fw_size=%d)", ioc->facts.FWImageSize);
- len += sprintf(buf+len, "\n MsgVersion = 0x%04x\n", ioc->facts.MsgVersion);
- len += sprintf(buf+len, " FirstWhoInit = 0x%02x\n", ioc->FirstWhoInit);
- len += sprintf(buf+len, " EventState = 0x%02x\n", ioc->facts.EventState);
+ seq_printf(m, " (fw_size=%d)", ioc->facts.FWImageSize);
+ seq_printf(m, "\n MsgVersion = 0x%04x\n", ioc->facts.MsgVersion);
+ seq_printf(m, " FirstWhoInit = 0x%02x\n", ioc->FirstWhoInit);
+ seq_printf(m, " EventState = 0x%02x\n", ioc->facts.EventState);

- len += sprintf(buf+len, " CurrentHostMfaHighAddr = 0x%08x\n",
+ seq_printf(m, " CurrentHostMfaHighAddr = 0x%08x\n",
ioc->facts.CurrentHostMfaHighAddr);
- len += sprintf(buf+len, " CurrentSenseBufferHighAddr = 0x%08x\n",
+ seq_printf(m, " CurrentSenseBufferHighAddr = 0x%08x\n",
ioc->facts.CurrentSenseBufferHighAddr);

- len += sprintf(buf+len, " MaxChainDepth = 0x%02x frames\n", ioc->facts.MaxChainDepth);
- len += sprintf(buf+len, " MinBlockSize = 0x%02x bytes\n", 4*ioc->facts.BlockSize);
+ seq_printf(m, " MaxChainDepth = 0x%02x frames\n", ioc->facts.MaxChainDepth);
+ seq_printf(m, " MinBlockSize = 0x%02x bytes\n", 4*ioc->facts.BlockSize);

- len += sprintf(buf+len, " RequestFrames @ 0x%p (Dma @ 0x%p)\n",
+ seq_printf(m, " RequestFrames @ 0x%p (Dma @ 0x%p)\n",
(void *)ioc->req_frames, (void *)(ulong)ioc->req_frames_dma);
/*
* Rounding UP to nearest 4-kB boundary here...
*/
sz = (ioc->req_sz * ioc->req_depth) + 128;
sz = ((sz + 0x1000UL - 1UL) / 0x1000) * 0x1000;
- len += sprintf(buf+len, " {CurReqSz=%d} x {CurReqDepth=%d} = %d bytes ^= 0x%x\n",
+ seq_printf(m, " {CurReqSz=%d} x {CurReqDepth=%d} = %d bytes ^= 0x%x\n",
ioc->req_sz, ioc->req_depth, ioc->req_sz*ioc->req_depth, sz);
- len += sprintf(buf+len, " {MaxReqSz=%d} {MaxReqDepth=%d}\n",
+ seq_printf(m, " {MaxReqSz=%d} {MaxReqDepth=%d}\n",
4*ioc->facts.RequestFrameSize,
ioc->facts.GlobalCredits);

- len += sprintf(buf+len, " Frames @ 0x%p (Dma @ 0x%p)\n",
+ seq_printf(m, " Frames @ 0x%p (Dma @ 0x%p)\n",
(void *)ioc->alloc, (void *)(ulong)ioc->alloc_dma);
sz = (ioc->reply_sz * ioc->reply_depth) + 128;
- len += sprintf(buf+len, " {CurRepSz=%d} x {CurRepDepth=%d} = %d bytes ^= 0x%x\n",
+ seq_printf(m, " {CurRepSz=%d} x {CurRepDepth=%d} = %d bytes ^= 0x%x\n",
ioc->reply_sz, ioc->reply_depth, ioc->reply_sz*ioc->reply_depth, sz);
- len += sprintf(buf+len, " {MaxRepSz=%d} {MaxRepDepth=%d}\n",
+ seq_printf(m, " {MaxRepSz=%d} {MaxRepDepth=%d}\n",
ioc->facts.CurReplyFrameSize,
ioc->facts.ReplyQueueDepth);

- len += sprintf(buf+len, " MaxDevices = %d\n",
+ seq_printf(m, " MaxDevices = %d\n",
(ioc->facts.MaxDevices==0) ? 255 : ioc->facts.MaxDevices);
- len += sprintf(buf+len, " MaxBuses = %d\n", ioc->facts.MaxBuses);
+ seq_printf(m, " MaxBuses = %d\n", ioc->facts.MaxBuses);

/* per-port info */
for (p=0; p < ioc->facts.NumberOfPorts; p++) {
- len += sprintf(buf+len, " PortNumber = %d (of %d)\n",
+ seq_printf(m, " PortNumber = %d (of %d)\n",
p+1,
ioc->facts.NumberOfPorts);
if (ioc->bus_type == FC) {
if (ioc->pfacts[p].ProtocolFlags & MPI_PORTFACTS_PROTOCOL_LAN) {
u8 *a = (u8*)&ioc->lan_cnfg_page1.HardwareAddressLow;
- len += sprintf(buf+len, " LanAddr = %02X:%02X:%02X:%02X:%02X:%02X\n",
+ seq_printf(m, " LanAddr = %02X:%02X:%02X:%02X:%02X:%02X\n",
a[5], a[4], a[3], a[2], a[1], a[0]);
}
- len += sprintf(buf+len, " WWN = %08X%08X:%08X%08X\n",
+ seq_printf(m, " WWN = %08X%08X:%08X%08X\n",
ioc->fc_port_page0[p].WWNN.High,
ioc->fc_port_page0[p].WWNN.Low,
ioc->fc_port_page0[p].WWPN.High,
@@ -6751,9 +6708,21 @@ procmpt_iocinfo_read(char *buf, char **s
}
}

- MPT_PROC_READ_RETURN(buf,start,offset,request,eof,len);
+ return 0;
+}
+
+static int mpt_iocinfo_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mpt_iocinfo_proc_show, PDE(inode)->data);
}

+static const struct file_operations mpt_iocinfo_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = mpt_iocinfo_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
#endif /* CONFIG_PROC_FS } */

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
@@ -6819,6 +6788,39 @@ mpt_print_ioc_summary(MPT_ADAPTER *ioc,

*size = y;
}
+
+static void seq_mpt_print_ioc_summary(MPT_ADAPTER *ioc, struct seq_file *m, int showlan)
+{
+ char expVer[32];
+
+ mpt_get_fw_exp_ver(expVer, ioc);
+
+ /*
+ * Shorter summary of attached ioc's...
+ */
+ seq_printf(m, "%s: %s, %s%08xh%s, Ports=%d, MaxQ=%d",
+ ioc->name,
+ ioc->prod_name,
+ MPT_FW_REV_MAGIC_ID_STRING, /* "FwRev=" or somesuch */
+ ioc->facts.FWVersion.Word,
+ expVer,
+ ioc->facts.NumberOfPorts,
+ ioc->req_depth);
+
+ if (showlan && (ioc->pfacts[0].ProtocolFlags & MPI_PORTFACTS_PROTOCOL_LAN)) {
+ u8 *a = (u8*)&ioc->lan_cnfg_page1.HardwareAddressLow;
+ seq_printf(m, ", LanAddr=%02X:%02X:%02X:%02X:%02X:%02X",
+ a[5], a[4], a[3], a[2], a[1], a[0]);
+ }
+
+ seq_printf(m, ", IRQ=%d", ioc->pci_irq);
+
+ if (!ioc->active)
+ seq_printf(m, " (disabled)");
+
+ seq_putc(m, '\n');
+}
+
/**
* mpt_set_taskmgmt_in_progress_flag - set flags associated with task management
* @ioc: Pointer to MPT_ADAPTER structure
diff -puN drivers/message/fusion/mptbase.h~mpt-fusion-convert-to-seq_file drivers/message/fusion/mptbase.h
--- a/drivers/message/fusion/mptbase.h~mpt-fusion-convert-to-seq_file
+++ a/drivers/message/fusion/mptbase.h
@@ -418,31 +418,6 @@ typedef struct _VirtDevice {
#define MPT_TARGET_FLAGS_LED_ON 0x80

/*
- * /proc/mpt interface
- */
-typedef struct {
- const char *name;
- mode_t mode;
- int pad;
- read_proc_t *read_proc;
- write_proc_t *write_proc;
-} mpt_proc_entry_t;
-
-#define MPT_PROC_READ_RETURN(buf,start,offset,request,eof,len) \
-do { \
- len -= offset; \
- if (len < request) { \
- *eof = 1; \
- if (len <= 0) \
- return 0; \
- } else \
- len = request; \
- *start = buf + offset; \
- return len; \
-} while (0)
-
-
-/*
* IOCTL structure and associated defines
*/

_