GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-03-17 12:34:01 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

xfs: prohibit fstrim in norecovery mode

Browse source 
The xfs fstrim implementation uses the free space btrees to find free
space that can be discarded.  If we haven't recovered the log, the bnobt
will be stale and we absolutely *cannot* use stale metadata to zap the
underlying storage.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
This commit is contained in:
Darrick J. Wong 2019-03-22 18:10:22 -07:00
parent 4b0bce30f3
commit ed79dac98c
1 changed files with 8 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
fs/xfs/xfs_discard.c
View file

@ -161,6 +161,14 @@ xfs_ioc_trim(
return -EPERM;
if (!blk_queue_discard(q))
return -EOPNOTSUPP;
/*
* We haven't recovered the log, so we cannot use our bnobt-guided
* storage zapping commands.
*/
if (mp->m_flags & XFS_MOUNT_NORECOVERY)
return -EROFS;
if (copy_from_user(&range, urange, sizeof(range)))
return -EFAULT;