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scsi: replace the fmode_t argument to scsi_ioctl with a simple bool

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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>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20230608110258.189493-20-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-06-08 13:02:47 +02:00 committed by Jens Axboe
parent 5f4eb9d541
commit 2e80089c18
7 changed files with 26 additions and 24 deletions
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3
drivers/scsi/ch.c
View File

@ -877,7 +877,8 @@ static long ch_ioctl(struct file *file,
}
default:
return scsi_ioctl(ch->device, file->f_mode, cmd, argp);
return scsi_ioctl(ch->device, file->f_mode & FMODE_WRITE, cmd,
argp);
}
}

34
drivers/scsi/scsi_ioctl.c
View File

@ -346,7 +346,7 @@ bool scsi_cmd_allowed(unsigned char *cmd, bool open_for_write)
EXPORT_SYMBOL(scsi_cmd_allowed);
static int scsi_fill_sghdr_rq(struct scsi_device *sdev, struct request *rq,
struct sg_io_hdr *hdr, fmode_t mode)
struct sg_io_hdr *hdr, bool open_for_write)
{
struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
@ -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 & FMODE_WRITE))
if (!scsi_cmd_allowed(scmd->cmnd, open_for_write))
return -EPERM;
scmd->cmd_len = hdr->cmd_len;
@ -407,7 +407,8 @@ static int scsi_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
return ret;
}
static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr,
bool open_for_write)
{
unsigned long start_time;
ssize_t ret = 0;
@ -448,7 +449,7 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
goto out_put_request;
}
ret = scsi_fill_sghdr_rq(sdev, rq, hdr, mode);
ret = scsi_fill_sghdr_rq(sdev, rq, hdr, open_for_write);
if (ret < 0)
goto out_put_request;
@ -477,8 +478,7 @@ out_put_request:
/**
* sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
* @q: request queue to send scsi commands down
* @mode: mode used to open the file through which the ioctl has been
* submitted
* @open_for_write: is the file / block device opened for writing?
* @sic: userspace structure describing the command to perform
*
* Send down the scsi command described by @sic to the device below
@ -501,7 +501,7 @@ out_put_request:
* Positive numbers returned are the compacted SCSI error codes (4
* bytes in one int) where the lowest byte is the SCSI status.
*/
static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
static int sg_scsi_ioctl(struct request_queue *q, bool open_for_write,
struct scsi_ioctl_command __user *sic)
{
struct request *rq;
@ -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 & FMODE_WRITE))
if (!scsi_cmd_allowed(scmd->cmnd, open_for_write))
goto error;
/* default. possible overridden later */
@ -776,7 +776,7 @@ static int scsi_put_cdrom_generic_arg(const struct cdrom_generic_command *cgc,
return 0;
}
static int scsi_cdrom_send_packet(struct scsi_device *sdev, fmode_t mode,
static int scsi_cdrom_send_packet(struct scsi_device *sdev, bool open_for_write,
void __user *arg)
{
struct cdrom_generic_command cgc;
@ -817,7 +817,7 @@ static int scsi_cdrom_send_packet(struct scsi_device *sdev, fmode_t mode,
hdr.cmdp = ((struct cdrom_generic_command __user *) arg)->cmd;
hdr.cmd_len = sizeof(cgc.cmd);
err = sg_io(sdev, &hdr, mode);
err = sg_io(sdev, &hdr, open_for_write);
if (err == -EFAULT)
return -EFAULT;
@ -832,7 +832,7 @@ static int scsi_cdrom_send_packet(struct scsi_device *sdev, fmode_t mode,
return err;
}
static int scsi_ioctl_sg_io(struct scsi_device *sdev, fmode_t mode,
static int scsi_ioctl_sg_io(struct scsi_device *sdev, bool open_for_write,
void __user *argp)
{
struct sg_io_hdr hdr;
@ -841,7 +841,7 @@ static int scsi_ioctl_sg_io(struct scsi_device *sdev, fmode_t mode,
error = get_sg_io_hdr(&hdr, argp);
if (error)
return error;
error = sg_io(sdev, &hdr, mode);
error = sg_io(sdev, &hdr, open_for_write);
if (error == -EFAULT)
return error;
if (put_sg_io_hdr(&hdr, argp))
@ -852,7 +852,7 @@ static int scsi_ioctl_sg_io(struct scsi_device *sdev, fmode_t mode,
/**
* scsi_ioctl - Dispatch ioctl to scsi device
* @sdev: scsi device receiving ioctl
* @mode: mode the block/char device is opened with
* @open_for_write: is the file / block device opened for writing?
* @cmd: which ioctl is it
* @arg: data associated with ioctl
*
@ -860,7 +860,7 @@ static int scsi_ioctl_sg_io(struct scsi_device *sdev, fmode_t mode,
* does not take a major/minor number as the dev field. Rather, it takes
* a pointer to a &struct scsi_device.
*/
int scsi_ioctl(struct scsi_device *sdev, fmode_t mode, int cmd,
int scsi_ioctl(struct scsi_device *sdev, bool open_for_write, int cmd,
void __user *arg)
{
struct request_queue *q = sdev->request_queue;
@ -896,11 +896,11 @@ int scsi_ioctl(struct scsi_device *sdev, fmode_t mode, int cmd,
case SG_EMULATED_HOST:
return sg_emulated_host(q, arg);
case SG_IO:
return scsi_ioctl_sg_io(sdev, mode, arg);
return scsi_ioctl_sg_io(sdev, open_for_write, arg);
case SCSI_IOCTL_SEND_COMMAND:
return sg_scsi_ioctl(q, mode, arg);
return sg_scsi_ioctl(q, open_for_write, arg);
case CDROM_SEND_PACKET:
return scsi_cdrom_send_packet(sdev, mode, arg);
return scsi_cdrom_send_packet(sdev, open_for_write, arg);
case CDROMCLOSETRAY:
return scsi_send_start_stop(sdev, 3);
case CDROMEJECT:

2
drivers/scsi/sd.c
View File

@ -1463,7 +1463,7 @@ static int sd_ioctl(struct block_device *bdev, fmode_t mode,
if (is_sed_ioctl(cmd))
return sed_ioctl(sdkp->opal_dev, cmd, p);
return scsi_ioctl(sdp, mode, cmd, p);
return scsi_ioctl(sdp, mode & FMODE_WRITE, cmd, p);
}
static void set_media_not_present(struct scsi_disk *sdkp)

5
drivers/scsi/sg.c
View File

@ -1103,7 +1103,8 @@ sg_ioctl_common(struct file *filp, Sg_device *sdp, Sg_fd *sfp,
case SCSI_IOCTL_SEND_COMMAND:
if (atomic_read(&sdp->detaching))
return -ENODEV;
return scsi_ioctl(sdp->device, filp->f_mode, cmd_in, p);
return scsi_ioctl(sdp->device, filp->f_mode & FMODE_WRITE,
cmd_in, p);
case SG_SET_DEBUG:
result = get_user(val, ip);
if (result)
@ -1159,7 +1160,7 @@ sg_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg)
ret = sg_ioctl_common(filp, sdp, sfp, cmd_in, p);
if (ret != -ENOIOCTLCMD)
return ret;
return scsi_ioctl(sdp->device, filp->f_mode, cmd_in, p);
return scsi_ioctl(sdp->device, filp->f_mode & FMODE_WRITE, cmd_in, p);
}
static __poll_t

2
drivers/scsi/sr.c
View File

@ -543,7 +543,7 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
if (ret != -ENOSYS)
goto put;
}
ret = scsi_ioctl(sdev, mode, cmd, argp);
ret = scsi_ioctl(sdev, mode & FMODE_WRITE, cmd, argp);
put:
scsi_autopm_put_device(sdev);

2
drivers/scsi/st.c
View File

@ -3832,7 +3832,7 @@ static long st_ioctl(struct file *file, unsigned int cmd_in, unsigned long arg)
break;
}
retval = scsi_ioctl(STp->device, file->f_mode, cmd_in, p);
retval = scsi_ioctl(STp->device, file->f_mode & FMODE_WRITE, cmd_in, p);
if (!retval && cmd_in == SCSI_IOCTL_STOP_UNIT) {
/* unload */
STp->rew_at_close = 0;

2
include/scsi/scsi_ioctl.h
View File

@ -45,7 +45,7 @@ typedef struct scsi_fctargaddress {
int scsi_ioctl_block_when_processing_errors(struct scsi_device *sdev,
int cmd, bool ndelay);
int scsi_ioctl(struct scsi_device *sdev, fmode_t mode, int cmd,
int scsi_ioctl(struct scsi_device *sdev, bool open_for_write, 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);