[PATCH 21/31] scsi: replace the fmode_t argument to ->sg_io_fn with a simple bool

Christoph Hellwig
2023-06-06T07:43:12Z

Instead of passing a fmode_t and only checking it for FMODE_WRITE, pass
a bool open_for_write to prepare for callers that won't have the fmode_t.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/bsg-lib.c | 2 +-
block/bsg.c | 8 +++++---
drivers/scsi/scsi_bsg.c | 4 ++--
include/linux/bsg.h | 2 +-
4 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index 435c32373cd68f..b3acdbdb6e7ea8 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -26,7 +26,7 @@ struct bsg_set {
};

static int bsg_transport_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
- fmode_t mode, unsigned int timeout)
+ bool open_for_write, unsigned int timeout)
{
struct bsg_job *job;
struct request *rq;
diff --git a/block/bsg.c b/block/bsg.c
index 7eca43f33d7ff8..bec4027842b31e 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -54,7 +54,8 @@ static unsigned int bsg_timeout(struct bsg_device *bd, struct sg_io_v4 *hdr)
return max_t(unsigned int, timeout, BLK_MIN_SG_TIMEOUT);
}

-static int bsg_sg_io(struct bsg_device *bd, fmode_t mode, void __user *uarg)
+static int bsg_sg_io(struct bsg_device *bd, bool open_for_write,
+ void __user *uarg)
{
struct sg_io_v4 hdr;
int ret;
@@ -63,7 +64,8 @@ static int bsg_sg_io(struct bsg_device *bd, fmode_t mode, void __user *uarg)
return -EFAULT;
if (hdr.guard != 'Q')
return -EINVAL;
- ret = bd->sg_io_fn(bd->queue, &hdr, mode, bsg_timeout(bd, &hdr));
+ ret = bd->sg_io_fn(bd->queue, &hdr, open_for_write,
+ bsg_timeout(bd, &hdr));
if (!ret && copy_to_user(uarg, &hdr, sizeof(hdr)))
return -EFAULT;
return ret;
@@ -146,7 +148,7 @@ static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case SG_EMULATED_HOST:
return put_user(1, intp);
case SG_IO:
- return bsg_sg_io(bd, file->f_mode, uarg);
+ return bsg_sg_io(bd, file->f_mode & FMODE_WRITE, uarg);
case SCSI_IOCTL_SEND_COMMAND:
pr_warn_ratelimited("%s: calling unsupported SCSI_IOCTL_SEND_COMMAND\n",
current->comm);
diff --git a/drivers/scsi/scsi_bsg.c b/drivers/scsi/scsi_bsg.c
index 12431f35f861e1..a9a9ec086a7e3f 100644
--- a/drivers/scsi/scsi_bsg.c
+++ b/drivers/scsi/scsi_bsg.c
@@ -10,7 +10,7 @@
#define uptr64(val) ((void __user *)(uintptr_t)(val))

static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
- fmode_t mode, unsigned int timeout)
+ bool open_for_write, unsigned int timeout)
{
struct scsi_cmnd *scmd;
struct request *rq;
@@ -42,7 +42,7 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
if (copy_from_user(scmd->cmnd, uptr64(hdr->request), scmd->cmd_len))
goto out_put_request;
ret = -EPERM;
- if (!scsi_cmd_allowed(scmd->cmnd, mode & FMODE_WRITE))
+ if (!scsi_cmd_allowed(scmd->cmnd, open_for_write))
goto out_put_request;

ret = 0;
diff --git a/include/linux/bsg.h b/include/linux/bsg.h
index 1ac81c809da9b3..ee2df73edf83f8 100644
--- a/include/linux/bsg.h
+++ b/include/linux/bsg.h
@@ -9,7 +9,7 @@ struct device;
struct request_queue;

typedef int (bsg_sg_io_fn)(struct request_queue *, struct sg_io_v4 *hdr,
- fmode_t mode, unsigned int timeout);
+ bool open_for_write, unsigned int timeout);

struct bsg_device *bsg_register_queue(struct request_queue *q,
struct device *parent, const char *name,
--
2.39.2