diff options
| author | Christoph Hellwig <hch@lst.de> | 2024-03-03 17:01:42 +0300 |
|---|---|---|
| committer | Song Liu <song@kernel.org> | 2024-03-06 19:59:53 +0300 |
| commit | 176df894d7974166c65d0cce3b3b019678f9e698 (patch) | |
| tree | 0974ddbd3a00c500268df57aa16a702717fea92e /drivers/md/md.h | |
| parent | 28be4fd310d146e9a43d7b1bb55cb7e9f5e06e88 (diff) | |
| download | linux-176df894d7974166c65d0cce3b3b019678f9e698.tar.xz | |
md: add a mddev_is_dm helper
Add a helper to check for a DM-mapped MD device instead of using
the obfuscated ->gendisk or ->queue NULL checks.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed--by: Song Liu <song@kernel.org>
Tested-by: Song Liu <song@kernel.org>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240303140150.5435-4-hch@lst.de
Diffstat (limited to 'drivers/md/md.h')
| -rw-r--r-- | drivers/md/md.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index e2e1ddd397ea..d5e99653c690 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -911,16 +911,24 @@ int do_md_run(struct mddev *mddev); extern const struct block_device_operations md_fops; +/* + * MD devices can be used undeneath by DM, in which case ->gendisk is NULL. + */ +static inline bool mddev_is_dm(struct mddev *mddev) +{ + return !mddev->gendisk; +} + static inline void mddev_trace_remap(struct mddev *mddev, struct bio *bio, sector_t sector) { - if (mddev->gendisk) + if (!mddev_is_dm(mddev)) trace_block_bio_remap(bio, disk_devt(mddev->gendisk), sector); } #define mddev_add_trace_msg(mddev, fmt, args...) \ do { \ - if ((mddev)->gendisk) \ + if (!mddev_is_dm(mddev)) \ blk_add_trace_msg((mddev)->queue, fmt, ##args); \ } while (0) |