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gfs2: perform quota checks against allocation parameters

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Use struct gfs2_alloc_parms as an argument to gfs2_quota_check()
and gfs2_quota_lock_check() to check for quota violations while
accounting for the new blocks requested by the current operation
in ap->target.

Previously, the number of new blocks requested during an operation
were not accounted for during quota_check and would allow these
operations to exceed quota. This was not very apparent since most
operations allocated only 1 block at a time and quotas would get
violated in the next operation. i.e. quota excess would only be by
1 block or so. With fallocate, (where we allocate a bunch of blocks
at once) the quota excess is non-trivial and is addressed by this
patch.

Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Abhi Das
2015-03-18 12:03:41 -05:00
committed by Bob Peterson
parent f1ea6f4ec0
commit b8fbf471ed
8 changed files with 32 additions and 27 deletions
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2
fs/gfs2/bmap.c
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@@ -1224,7 +1224,7 @@ static int do_grow(struct inode *inode, u64 size)
if (gfs2_is_stuffed(ip) &&
(size > (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)))) {
error = gfs2_quota_lock_check(ip);
error = gfs2_quota_lock_check(ip, &ap);
if (error)
return error;