6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Darrick J. Wong <djwong@xxxxxxxxxx>
commit 16e1fbdce9c8d084863fd63cdaff8fb2a54e2f88 upstream.
Take the grow lock when we're expanding the realtime volume, like we do
for the other growfs calls.
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Chandan Babu R <chandanbabu@xxxxxxxxxx>
Signed-off-by: Catherine Hoang <catherine.hoang@xxxxxxxxxx>
Acked-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/xfs/xfs_rtalloc.c | 38 +++++++++++++++++++++++++-------------
1 file changed, 25 insertions(+), 13 deletions(-)
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index 608db1ab88a4..9268961d887c 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -953,34 +953,39 @@ xfs_growfs_rt(
/* Needs to have been mounted with an rt device. */
if (!XFS_IS_REALTIME_MOUNT(mp))
return -EINVAL;
+
+ if (!mutex_trylock(&mp->m_growlock))
+ return -EWOULDBLOCK;
/*
* Mount should fail if the rt bitmap/summary files don't load, but
* we'll check anyway.
*/
+ error = -EINVAL;
if (!mp->m_rbmip || !mp->m_rsumip)
- return -EINVAL;
+ goto out_unlock;
/* Shrink not supported. */
if (in->newblocks <= sbp->sb_rblocks)
- return -EINVAL;
+ goto out_unlock;
/* Can only change rt extent size when adding rt volume. */
if (sbp->sb_rblocks > 0 && in->extsize != sbp->sb_rextsize)
- return -EINVAL;
+ goto out_unlock;
/* Range check the extent size. */
if (XFS_FSB_TO_B(mp, in->extsize) > XFS_MAX_RTEXTSIZE ||
XFS_FSB_TO_B(mp, in->extsize) < XFS_MIN_RTEXTSIZE)
- return -EINVAL;
+ goto out_unlock;
/* Unsupported realtime features. */
+ error = -EOPNOTSUPP;
if (xfs_has_rmapbt(mp) || xfs_has_reflink(mp) || xfs_has_quota(mp))
- return -EOPNOTSUPP;
+ goto out_unlock;
nrblocks = in->newblocks;
error = xfs_sb_validate_fsb_count(sbp, nrblocks);
if (error)
- return error;
+ goto out_unlock;
/*
* Read in the last block of the device, make sure it exists.
*/
@@ -988,7 +993,7 @@ xfs_growfs_rt(
XFS_FSB_TO_BB(mp, nrblocks - 1),
XFS_FSB_TO_BB(mp, 1), 0, &bp, NULL);
if (error)
- return error;
+ goto out_unlock;
xfs_buf_relse(bp);
/*
@@ -996,8 +1001,10 @@ xfs_growfs_rt(
*/
nrextents = nrblocks;
do_div(nrextents, in->extsize);
- if (!xfs_validate_rtextents(nrextents))
- return -EINVAL;
+ if (!xfs_validate_rtextents(nrextents)) {
+ error = -EINVAL;
+ goto out_unlock;
+ }
nrbmblocks = howmany_64(nrextents, NBBY * sbp->sb_blocksize);
nrextslog = xfs_compute_rextslog(nrextents);
nrsumlevels = nrextslog + 1;
@@ -1009,8 +1016,11 @@ xfs_growfs_rt(
* the log. This prevents us from getting a log overflow,
* since we'll log basically the whole summary file at once.
*/
- if (nrsumblocks > (mp->m_sb.sb_logblocks >> 1))
- return -EINVAL;
+ if (nrsumblocks > (mp->m_sb.sb_logblocks >> 1)) {
+ error = -EINVAL;
+ goto out_unlock;
+ }
+
/*
* Get the old block counts for bitmap and summary inodes.
* These can't change since other growfs callers are locked out.
@@ -1022,10 +1032,10 @@ xfs_growfs_rt(
*/
error = xfs_growfs_rt_alloc(mp, rbmblocks, nrbmblocks, mp->m_rbmip);
if (error)
- return error;
+ goto out_unlock;
error = xfs_growfs_rt_alloc(mp, rsumblocks, nrsumblocks, mp->m_rsumip);
if (error)
- return error;
+ goto out_unlock;
rsum_cache = mp->m_rsum_cache;
if (nrbmblocks != sbp->sb_rbmblocks)
@@ -1190,6 +1200,8 @@ xfs_growfs_rt(
}
}
+out_unlock:
+ mutex_unlock(&mp->m_growlock);
return error;
}
--
2.39.5
