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authorChristoph Hellwig <hch@lst.de>2023-08-11 13:08:26 +0300
committerChristian Brauner <brauner@kernel.org>2023-08-21 15:35:32 +0300
commit2142b88c37a3e49fbca4a36b8674626917d9bf40 (patch)
tree29c2476d72b5c8fe1a6b8040bba770d81c3d9b71 /fs/super.c
parentd8530de5a6e82be0ce17a5fdf727a394bcf6444c (diff)
downloadlinux-2142b88c37a3e49fbca4a36b8674626917d9bf40.tar.xz
block: call into the file system for ioctl BLKFLSBUF
BLKFLSBUF is a historic ioctl that is called on a file handle to a block device and syncs either the file system mounted on that block device if there is one, or otherwise the just the data on the block device. Replace the get_super based syncing with a holder operation to remove the last usage of get_super, and to also support syncing the file system if the block device is not the main block device stored in s_dev. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Josef Bacik <josef@toxicpanda.com> Message-Id: <20230811100828.1897174-16-hch@lst.de> Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/super.c')
-rw-r--r--fs/super.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/super.c b/fs/super.c
index 11fa21da130c..1a369fa3f0a6 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1248,8 +1248,21 @@ static void fs_bdev_mark_dead(struct block_device *bdev, bool surprise)
up_read(&sb->s_umount);
}
+static void fs_bdev_sync(struct block_device *bdev)
+{
+ struct super_block *sb = bdev->bd_holder;
+
+ lockdep_assert_held(&bdev->bd_holder_lock);
+
+ if (!lock_active_super(sb))
+ return;
+ sync_filesystem(sb);
+ up_read(&sb->s_umount);
+}
+
const struct blk_holder_ops fs_holder_ops = {
.mark_dead = fs_bdev_mark_dead,
+ .sync = fs_bdev_sync,
};
EXPORT_SYMBOL_GPL(fs_holder_ops);