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| author |   Abhi Das <adas@redhat.com> | 2015-06-02 11:03:04 -0500 |
|---|---|---|
| committer |   Bob Peterson <rpeterso@redhat.com> | 2015-06-02 11:03:04 -0500 |
| commit | 9cde2898d04595c3bf24828822b3ea7acff181dd (patch) | |
| tree | 65c0471a46f03a5ccf0b6aad9d940701b2a95126 /fs/gfs2/quota.c | |
| parent | gfs2: fix quota updates on block boundaries (diff) | |
| download | linux-dev-9cde2898d04595c3bf24828822b3ea7acff181dd.tar.xz linux-dev-9cde2898d04595c3bf24828822b3ea7acff181dd.zip | |
gfs2: limit quota log messages
This patch makes the quota subsystem only report once that a
particular user/group has exceeded their allotted quota.
Previously, it was possible for a program to continuously try
exceeding quota (despite receiving EDQUOT) and in turn trigger
gfs2 to issue a kernel log message about quota exceed. In theory,
this could get out of hand and flood the log and the filesystem
hosting the log files.
Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2/quota.c')
| -rw-r--r-- | fs/gfs2/quota.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index 7c2003177884..dcd598aa2691 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -649,6 +649,8 @@ static void do_qc(struct gfs2_quota_data *qd, s64 change) slot_hold(qd); } + if (change < 0) /* Reset quiet flag if we freed some blocks */ + clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); mutex_unlock(&sdp->sd_quota_mutex); } @@ -1187,10 +1189,13 @@ int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid, /* If no min_target specified or we don't meet * min_target, return -EDQUOT */ if (!ap->min_target || ap->min_target > ap->allowed) { - print_message(qd, "exceeded"); - quota_send_warning(qd->qd_id, - sdp->sd_vfs->s_dev, - QUOTA_NL_BHARDWARN); + if (!test_and_set_bit(QDF_QMSG_QUIET, + &qd->qd_flags)) { + print_message(qd, "exceeded"); + quota_send_warning(qd->qd_id, + sdp->sd_vfs->s_dev, + QUOTA_NL_BHARDWARN); + } error = -EDQUOT; break; } @@ -1685,6 +1690,8 @@ static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, /* Apply changes */ error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); + if (!error) + clear_bit(QDF_QMSG_QUIET, &qd->qd_flags); gfs2_trans_end(sdp); out_release: |