From: Naohiro Aota Date: Thu, 4 Feb 2021 10:22:09 +0000 (+0900) Subject: btrfs: zoned: wait for existing extents before truncating X-Git-Tag: v5.12-rc1~165^2~13 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=24c0a7227fdfa598badcfc0f735d16745d39e0c4;p=thirdparty%2Fkernel%2Flinux.git btrfs: zoned: wait for existing extents before truncating When truncating a file, file buffers which have already been allocated but not yet written may be truncated. Truncating these buffers could cause breakage of a sequential write pattern in a block group if the truncated blocks are for example followed by blocks allocated to another file. To avoid this problem, always wait for write out of all unwritten buffers before proceeding with the truncate execution. Signed-off-by: Naohiro Aota Reviewed-by: Josef Bacik Signed-off-by: David Sterba --- diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index c4779cde83c62..535abf8982251 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5169,6 +5169,15 @@ static int btrfs_setsize(struct inode *inode, struct iattr *attr) btrfs_drew_write_unlock(&root->snapshot_lock); btrfs_end_transaction(trans); } else { + struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); + + if (btrfs_is_zoned(fs_info)) { + ret = btrfs_wait_ordered_range(inode, + ALIGN(newsize, fs_info->sectorsize), + (u64)-1); + if (ret) + return ret; + } /* * We're truncating a file that used to have good data down to