[PATCH 19/31] scsi: replace the fmode_t argument to scsi_cmd_allowed with a simple bool

Christoph Hellwig
2023-06-06T07:43:24Z

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>
---
drivers/scsi/scsi_bsg.c | 2 +-
drivers/scsi/scsi_ioctl.c | 8 ++++----
drivers/scsi/sg.c | 2 +-
include/scsi/scsi_ioctl.h | 2 +-
4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/scsi_bsg.c b/drivers/scsi/scsi_bsg.c
index 96ee35256a168f..12431f35f861e1 100644
--- a/drivers/scsi/scsi_bsg.c
+++ b/drivers/scsi/scsi_bsg.c
@@ -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))
+ if (!scsi_cmd_allowed(scmd->cmnd, mode & FMODE_WRITE))
goto out_put_request;

ret = 0;
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index e3b31d32b6a92e..dda5468ca97f90 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c
@@ -248,7 +248,7 @@ static int scsi_send_start_stop(struct scsi_device *sdev, int data)
* Only a subset of commands are allowed for unprivileged users. Commands used
* to format the media, update the firmware, etc. are not permitted.
*/
-bool scsi_cmd_allowed(unsigned char *cmd, fmode_t mode)
+bool scsi_cmd_allowed(unsigned char *cmd, bool open_for_write)
{
/* root can do any command. */
if (capable(CAP_SYS_RAWIO))
@@ -338,7 +338,7 @@ bool scsi_cmd_allowed(unsigned char *cmd, fmode_t mode)
case GPCMD_SET_READ_AHEAD:
/* ZBC */
case ZBC_OUT:
- return (mode & FMODE_WRITE);
+ return open_for_write;
default:
return false;
}
@@ -354,7 +354,7 @@ static int scsi_fill_sghdr_rq(struct scsi_device *sdev, struct request *rq,
return -EMSGSIZE;
if (copy_from_user(scmd->cmnd, hdr->cmdp, hdr->cmd_len))
return -EFAULT;
- if (!scsi_cmd_allowed(scmd->cmnd, mode))
+ if (!scsi_cmd_allowed(scmd->cmnd, mode & FMODE_WRITE))
return -EPERM;
scmd->cmd_len = hdr->cmd_len;

@@ -554,7 +554,7 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
goto error;

err = -EPERM;
- if (!scsi_cmd_allowed(scmd->cmnd, mode))
+ if (!scsi_cmd_allowed(scmd->cmnd, mode & FMODE_WRITE))
goto error;

/* default. possible overridden later */
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 037f8c98a6d364..e49ea693d0b656 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -237,7 +237,7 @@ static int sg_allow_access(struct file *filp, unsigned char *cmd)

if (sfp->parentdp->device->type == TYPE_SCANNER)
return 0;
- if (!scsi_cmd_allowed(cmd, filp->f_mode))
+ if (!scsi_cmd_allowed(cmd, filp->f_mode & FMODE_WRITE))
return -EPERM;
return 0;
}
diff --git a/include/scsi/scsi_ioctl.h b/include/scsi/scsi_ioctl.h
index beac64e38b8746..914201a8cb947c 100644
--- a/include/scsi/scsi_ioctl.h
+++ b/include/scsi/scsi_ioctl.h
@@ -49,7 +49,7 @@ int scsi_ioctl(struct scsi_device *sdev, fmode_t mode, int cmd,
void __user *arg);
int get_sg_io_hdr(struct sg_io_hdr *hdr, const void __user *argp);
int put_sg_io_hdr(const struct sg_io_hdr *hdr, void __user *argp);
-bool scsi_cmd_allowed(unsigned char *cmd, fmode_t mode);
+bool scsi_cmd_allowed(unsigned char *cmd, bool open_for_write);

#endif /* __KERNEL__ */
#endif /* _SCSI_IOCTL_H */
--
2.39.2