diff options
| author | Christoph Hellwig <hch@lst.de> | 2023-06-01 11:44:54 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-06-05 18:53:04 +0200 |
| commit | 87efb39075be6a288cd7f23858f15bd01c83028a (patch) | |
| tree | 38368ad769eb40bbecd5229df2ed9fb215a124f4 /fs/super.c | |
| parent | block: add a mark_dead holder operation (diff) | |
| download | linux-87efb39075be6a288cd7f23858f15bd01c83028a.tar.xz linux-87efb39075be6a288cd7f23858f15bd01c83028a.zip | |
fs: add a method to shut down the file system
Add a new ->shutdown super operation that can be used to tell the file
system to shut down, and call it from newly created holder ops when the
block device under a file system shuts down.
This only covers the main block device for "simple" file systems using
get_tree_bdev / mount_bdev. File systems their own get_tree method
or opening additional devices will need to set up their own
blk_holder_ops.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Link: https://lore.kernel.org/r/20230601094459.1350643-12-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/super.c')
| -rw-r--r-- | fs/super.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/fs/super.c b/fs/super.c index 012ce1400803..f127589700ab 100644 --- a/fs/super.c +++ b/fs/super.c @@ -1206,6 +1206,22 @@ int get_tree_keyed(struct fs_context *fc, EXPORT_SYMBOL(get_tree_keyed); #ifdef CONFIG_BLOCK +static void fs_mark_dead(struct block_device *bdev) +{ + struct super_block *sb; + + sb = get_super(bdev); + if (!sb) + return; + + if (sb->s_op->shutdown) + sb->s_op->shutdown(sb); + drop_super(sb); +} + +static const struct blk_holder_ops fs_holder_ops = { + .mark_dead = fs_mark_dead, +}; static int set_bdev_super(struct super_block *s, void *data) { @@ -1248,7 +1264,8 @@ int get_tree_bdev(struct fs_context *fc, if (!fc->source) return invalf(fc, "No source specified"); - bdev = blkdev_get_by_path(fc->source, mode, fc->fs_type, NULL); + bdev = blkdev_get_by_path(fc->source, mode, fc->fs_type, + &fs_holder_ops); if (IS_ERR(bdev)) { errorf(fc, "%s: Can't open blockdev", fc->source); return PTR_ERR(bdev); @@ -1333,7 +1350,7 @@ struct dentry *mount_bdev(struct file_system_type *fs_type, if (!(flags & SB_RDONLY)) mode |= FMODE_WRITE; - bdev = blkdev_get_by_path(dev_name, mode, fs_type, NULL); + bdev = blkdev_get_by_path(dev_name, mode, fs_type, &fs_holder_ops); if (IS_ERR(bdev)) return ERR_CAST(bdev); |