diff options
| -rw-r--r-- | fs/super.c | 11 | ||||
| -rw-r--r-- | include/linux/fs.h | 9 |
2 files changed, 20 insertions, 0 deletions
diff --git a/fs/super.c b/fs/super.c index 80418ca8e215..7f876f32343a 100644 --- a/fs/super.c +++ b/fs/super.c @@ -1459,6 +1459,17 @@ static void fs_bdev_mark_dead(struct block_device *bdev, bool surprise) if (!sb) return; + if (sb->s_op->remove_bdev) { + int ret; + + ret = sb->s_op->remove_bdev(sb, bdev); + if (!ret) { + super_unlock_shared(sb); + return; + } + /* Fallback to shutdown. */ + } + if (!surprise) sync_filesystem(sb); shrink_dcache_sb(sb); diff --git a/include/linux/fs.h b/include/linux/fs.h index 1f7aa7a14321..2ec4807d4ea8 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2367,6 +2367,15 @@ struct super_operations { struct shrink_control *); long (*free_cached_objects)(struct super_block *, struct shrink_control *); + /* + * If a filesystem can support graceful removal of a device and + * continue read-write operations, implement this callback. + * + * Return 0 if the filesystem can continue read-write. + * Non-zero return value or no such callback means the fs will be shutdown + * as usual. + */ + int (*remove_bdev)(struct super_block *sb, struct block_device *bdev); void (*shutdown)(struct super_block *sb); }; |