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authorAbhi Das <adas@redhat.com>2015-03-18 20:03:41 +0300
committerBob Peterson <rpeterso@redhat.com>2015-03-18 20:46:54 +0300
commitb8fbf471edb3dbf441716fd2a52a7ca76c381381 (patch)
treea5a2132cc29397dd1f1d8892497dbf18b2fb125f /fs/gfs2/quota.c
parentf1ea6f4ec0a48d7b6bbf4d380a0ac14d69fadb44 (diff)
downloadlinux-b8fbf471edb3dbf441716fd2a52a7ca76c381381.tar.xz
gfs2: perform quota checks against allocation parameters
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>
Diffstat (limited to 'fs/gfs2/quota.c')
-rw-r--r--fs/gfs2/quota.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 3aa17d4d1cfc..964a769a7a86 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -1094,7 +1094,8 @@ static int print_message(struct gfs2_quota_data *qd, char *type)
return 0;
}
-int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
+int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
+ struct gfs2_alloc_parms *ap)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_quota_data *qd;
@@ -1117,14 +1118,13 @@ int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
spin_lock(&qd_lock);
- value += qd->qd_change;
+ value += qd->qd_change + ap->target;
spin_unlock(&qd_lock);
if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) {
print_message(qd, "exceeded");
quota_send_warning(qd->qd_id,
sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN);
-
error = -EDQUOT;
break;
} else if (be64_to_cpu(qd->qd_qb.qb_warn) &&