diff options
| author | Christoph Hellwig <hch@lst.de> | 2023-06-01 11:44:52 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-06-05 18:53:04 +0200 |
| commit | 0718afd47f70cf46877c39c25d06b786e1a3f36c (patch) | |
| tree | cfe87d979122314904b2f9639fcb0a62e40a028a /include | |
| parent | block: remove blk_drop_partitions (diff) | |
| download | linux-0718afd47f70cf46877c39c25d06b786e1a3f36c.tar.xz linux-0718afd47f70cf46877c39c25d06b786e1a3f36c.zip | |
block: introduce holder ops
Add a new blk_holder_ops structure, which is passed to blkdev_get_by_* and
installed in the block_device for exclusive claims. It will be used to
allow the block layer to call back into the user of the block device for
thing like notification of a removed device or a device resize.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Link: https://lore.kernel.org/r/20230601094459.1350643-10-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/blk_types.h | 2 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 11 |
2 files changed, 10 insertions, 3 deletions
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 8ef209e3aa96..deb69eeab6bd 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -55,6 +55,8 @@ struct block_device { struct super_block * bd_super; void * bd_claiming; void * bd_holder; + const struct blk_holder_ops *bd_holder_ops; + struct mutex bd_holder_lock; /* The counter of freeze processes */ int bd_fsfreeze_count; int bd_holders; diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index d89c2da14698..44f2a8bc57e8 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1470,10 +1470,15 @@ void blkdev_show(struct seq_file *seqf, off_t offset); #define BLKDEV_MAJOR_MAX 0 #endif +struct blk_holder_ops { +}; + +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, - void *holder); -struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder); -int bd_prepare_to_claim(struct block_device *bdev, void *holder); + void *holder, const struct blk_holder_ops *hops); +int bd_prepare_to_claim(struct block_device *bdev, void *holder, + const struct blk_holder_ops *hops); void bd_abort_claiming(struct block_device *bdev, void *holder); void blkdev_put(struct block_device *bdev, fmode_t mode); |