diff options
| author | Christoph Hellwig <hch@lst.de> | 2023-06-08 13:02:44 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-06-12 08:04:04 -0600 |
| commit | 3f0b3e785e8b54a40c530fa77b7ab37bec925c57 (patch) | |
| tree | 94db68e2f6bd9e2f9270bbdd2481c8f43f64a8f1 /include/linux/blkdev.h | |
| parent | 2736e8eeb0ccdc71d1f4256c9c9a28f58cc43307 (diff) | |
| download | lwn-3f0b3e785e8b54a40c530fa77b7ab37bec925c57.tar.gz lwn-3f0b3e785e8b54a40c530fa77b7ab37bec925c57.zip | |
block: add a sb_open_mode helper
Add a helper to return the open flags for blkdev_get_by* for passed in
super block flags instead of open coding the logic in many places.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20230608110258.189493-17-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index d5b99796f12c..978036039020 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1473,6 +1473,13 @@ struct blk_holder_ops { void (*mark_dead)(struct block_device *bdev); }; +/* + * Return the correct open flags for blkdev_get_by_* for super block flags + * as stored in sb->s_flags. + */ +#define sb_open_mode(flags) \ + (FMODE_READ | (((flags) & SB_RDONLY) ? 0 : FMODE_WRITE)) + struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder, const struct blk_holder_ops *hops); struct block_device *blkdev_get_by_path(const char *path, fmode_t mode, |