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| author | Abhi Das <adas@redhat.com> | 2015-03-18 12:03:41 -0500 |
|---|---|---|
| committer | Bob Peterson <rpeterso@redhat.com> | 2015-03-18 12:46:54 -0500 |
| commit | b8fbf471edb3dbf441716fd2a52a7ca76c381381 (patch) | |
| tree | a5a2132cc29397dd1f1d8892497dbf18b2fb125f /fs/gfs2/quota.c | |
| parent | f1ea6f4ec0a48d7b6bbf4d380a0ac14d69fadb44 (diff) | |
| download | lwn-b8fbf471edb3dbf441716fd2a52a7ca76c381381.tar.gz lwn-b8fbf471edb3dbf441716fd2a52a7ca76c381381.zip | |
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.c | 6 |
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) && |