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| author | Andreas Gruenbacher <agruenba@redhat.com> | 2018-02-20 16:03:24 +0100 |
|---|---|---|
| committer | Bob Peterson <rpeterso@redhat.com> | 2018-03-08 17:26:20 +0100 |
| commit | 174d1232ebc84fcde8f5889d1171c9c7e74a10a7 (patch) | |
| tree | 755eabd7f57703c96d0979a52cc555d0c0deecb3 | |
| parent | Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost (diff) | |
| download | linux-174d1232ebc84fcde8f5889d1171c9c7e74a10a7.tar.xz linux-174d1232ebc84fcde8f5889d1171c9c7e74a10a7.zip | |
gfs2: Fix fallocate chunk size
The chunk size of allocations in __gfs2_fallocate is calculated
incorrectly. The size can collapse, causing __gfs2_fallocate to
allocate one block at a time, which is very inefficient. This needs
fixing in two places:
In gfs2_quota_lock_check, always set ap->allowed to UINT_MAX to indicate
that there is no quota limit. This fixes callers that rely on
ap->allowed to be set even when quotas are off.
In __gfs2_fallocate, reset max_blks to UINT_MAX in each iteration of the
loop to make sure that allocation limits from one resource group won't
spill over into another resource group.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| -rw-r--r-- | fs/gfs2/file.c | 5 | ||||
| -rw-r--r-- | fs/gfs2/quota.h | 2 |
2 files changed, 5 insertions, 2 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 4f88e201b3f0..2edd3a9a7b79 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -809,7 +809,7 @@ static long __gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t struct gfs2_inode *ip = GFS2_I(inode); struct gfs2_alloc_parms ap = { .aflags = 0, }; unsigned int data_blocks = 0, ind_blocks = 0, rblocks; - loff_t bytes, max_bytes, max_blks = UINT_MAX; + loff_t bytes, max_bytes, max_blks; int error; const loff_t pos = offset; const loff_t count = len; @@ -861,7 +861,8 @@ static long __gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t return error; /* ap.allowed tells us how many blocks quota will allow * us to write. Check if this reduces max_blks */ - if (ap.allowed && ap.allowed < max_blks) + max_blks = UINT_MAX; + if (ap.allowed) max_blks = ap.allowed; error = gfs2_inplace_reserve(ip, &ap); diff --git a/fs/gfs2/quota.h b/fs/gfs2/quota.h index 5e47c935a515..836f29480be6 100644 --- a/fs/gfs2/quota.h +++ b/fs/gfs2/quota.h @@ -45,6 +45,8 @@ static inline int gfs2_quota_lock_check(struct gfs2_inode *ip, { struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); int ret; + + ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */ if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) return 0; ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |