diff options
authorQu Wenruo <>2018-03-20 14:42:24 +0800
committerDavid Sterba <>2018-03-30 22:15:54 +0200
commite02049d964e77d22348bf940a7027a1aff558f18 (patch)
parent992aa558397e519d2251cdc6c4d3a9e019b240a0 (diff)
btrfs-progs: convert: Fix inline file extent creation condition
[Bug] On btrfs converted from ext*, one user reported the following kernel warning: ------------[ cut here ]------------ BTRFS: Transaction aborted (error -95) WARNING: CPU: 0 PID: 324 at fs/btrfs/inode.c:3042 btrfs_finish_ordered_io+0x7ab/0x850 [btrfs] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs] RIP: 0010:btrfs_finish_ordered_io+0x7ab/0x850 [btrfs] ... Call Trace: normal_work_helper+0x39/0x370 [btrfs] process_one_work+0x1ce/0x410 worker_thread+0x2b/0x3d0 ? process_one_work+0x410/0x410 kthread+0x113/0x130 ? kthread_create_on_node+0x70/0x70 ? do_syscall_64+0x74/0x190 ? SyS_exit_group+0x10/0x10 ret_from_fork+0x35/0x40 ---[ end trace c8ed62ff6a525901 ]--- BTRFS: error (device dm-2) in btrfs_finish_ordered_io:3042: errno=-95 unknown BTRFS info (device dm-2): forced readonly BTRFS error (device dm-2): pending csums is 6447104 [Cause] The call trace and the unique return value points to __btrfs_drop_extents(), when we tries to drop pages of an inline extent, we will trigger such -EOPNOTSUPP. However kernel has limitation on the size of inline file extent (sector size for ram size and sector size - 1 for on-disk size), btrfs-convert doesn't have the same limitation, resulting much larger file extent. The lack of correct inline extent size check dates back to 2008 when btrfs-convert is added into btrfs-progs. [Fix] Fix the inline extent creation condition, not only using BTRFS_MAX_INLINE_DATA_SIZE(), which is only the maximum size of inline data according to nodesize, but also limit it against sector size. Signed-off-by: Qu Wenruo <> Signed-off-by: David Sterba <>
2 files changed, 3 insertions, 2 deletions
diff --git a/convert/source-ext2.c b/convert/source-ext2.c
index 070126ec..a2af1212 100644
--- a/convert/source-ext2.c
+++ b/convert/source-ext2.c
@@ -310,7 +310,7 @@ static int ext2_create_file_extents(struct btrfs_trans_handle *trans,
if (ret)
goto fail;
if ((convert_flags & CONVERT_FLAG_INLINE_DATA) && data.first_block == 0
- && data.num_blocks > 0
+ && data.num_blocks > 0 && inode_size < sectorsize
&& inode_size <= BTRFS_MAX_INLINE_DATA_SIZE(root->fs_info)) {
u64 num_bytes = data.num_blocks * sectorsize;
u64 disk_bytenr = data.disk_block * sectorsize;
diff --git a/convert/source-reiserfs.c b/convert/source-reiserfs.c
index 39d6f072..eeb68d96 100644
--- a/convert/source-reiserfs.c
+++ b/convert/source-reiserfs.c
@@ -376,7 +376,8 @@ static int reiserfs_convert_tail(struct btrfs_trans_handle *trans,
u64 isize;
int ret;
- if (length >= BTRFS_MAX_INLINE_DATA_SIZE(root->fs_info))
+ if (length >= BTRFS_MAX_INLINE_DATA_SIZE(root->fs_info) ||
+ length >= root->fs_info->sectorsize)
return convert_direct(trans, root, objectid, inode, body,
length, offset, convert_flags);