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block: replace fmode_t with a block-specific type for block open flags

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The only overlap between the block open flags mapped into the fmode_t and
other uses of fmode_t are FMODE_READ and FMODE_WRITE.  Define a new
blk_mode_t instead for use in blkdev_get_by_{dev,path}, ->open and
->ioctl and stop abusing fmode_t.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jack Wang <jinpu.wang@ionos.com>		[rnbd]
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20230608110258.189493-28-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2023-06-08 13:02:55 +02:00
committed by Jens Axboe
parent 5e4ea83467
commit 05bdb99653
82 changed files with 334 additions and 315 deletions
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22
drivers/block/loop.c
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@@ -990,7 +990,7 @@ loop_set_status_from_info(struct loop_device *lo,
return 0;
}
static int loop_configure(struct loop_device *lo, fmode_t mode,
static int loop_configure(struct loop_device *lo, blk_mode_t mode,
struct block_device *bdev,
const struct loop_config *config)
{
@@ -1014,7 +1014,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
* If we don't hold exclusive handle for the device, upgrade to it
* here to avoid changing device under exclusive owner.
*/
if (!(mode & FMODE_EXCL)) {
if (!(mode & BLK_OPEN_EXCL)) {
error = bd_prepare_to_claim(bdev, loop_configure, NULL);
if (error)
goto out_putf;
@@ -1050,7 +1050,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
if (error)
goto out_unlock;
if (!(file->f_mode & FMODE_WRITE) || !(mode & FMODE_WRITE) ||
if (!(file->f_mode & FMODE_WRITE) || !(mode & BLK_OPEN_WRITE) ||
!file->f_op->write_iter)
lo->lo_flags |= LO_FLAGS_READ_ONLY;
@@ -1116,7 +1116,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
if (partscan)
loop_reread_partitions(lo);
if (!(mode & FMODE_EXCL))
if (!(mode & BLK_OPEN_EXCL))
bd_abort_claiming(bdev, loop_configure);
return 0;
@@ -1124,7 +1124,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
out_unlock:
loop_global_unlock(lo, is_loop);
out_bdev:
if (!(mode & FMODE_EXCL))
if (!(mode & BLK_OPEN_EXCL))
bd_abort_claiming(bdev, loop_configure);
out_putf:
fput(file);
@@ -1528,7 +1528,7 @@ static int lo_simple_ioctl(struct loop_device *lo, unsigned int cmd,
return err;
}
static int lo_ioctl(struct block_device *bdev, fmode_t mode,
static int lo_ioctl(struct block_device *bdev, blk_mode_t mode,
unsigned int cmd, unsigned long arg)
{
struct loop_device *lo = bdev->bd_disk->private_data;
@@ -1563,24 +1563,22 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
return loop_clr_fd(lo);
case LOOP_SET_STATUS:
err = -EPERM;
if ((mode & FMODE_WRITE) || capable(CAP_SYS_ADMIN)) {
if ((mode & BLK_OPEN_WRITE) || capable(CAP_SYS_ADMIN))
err = loop_set_status_old(lo, argp);
}
break;
case LOOP_GET_STATUS:
return loop_get_status_old(lo, argp);
case LOOP_SET_STATUS64:
err = -EPERM;
if ((mode & FMODE_WRITE) || capable(CAP_SYS_ADMIN)) {
if ((mode & BLK_OPEN_WRITE) || capable(CAP_SYS_ADMIN))
err = loop_set_status64(lo, argp);
}
break;
case LOOP_GET_STATUS64:
return loop_get_status64(lo, argp);
case LOOP_SET_CAPACITY:
case LOOP_SET_DIRECT_IO:
case LOOP_SET_BLOCK_SIZE:
if (!(mode & FMODE_WRITE) && !capable(CAP_SYS_ADMIN))
if (!(mode & BLK_OPEN_WRITE) && !capable(CAP_SYS_ADMIN))
return -EPERM;
fallthrough;
default:
@@ -1691,7 +1689,7 @@ loop_get_status_compat(struct loop_device *lo,
return err;
}
static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
static int lo_compat_ioctl(struct block_device *bdev, blk_mode_t mode,
unsigned int cmd, unsigned long arg)
{
struct loop_device *lo = bdev->bd_disk->private_data;