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gfs2: introduce qd_bh_get_or_undo 

This patch is an attempt to force some consistency in quota sync
processing. Two functions (qd_fish and gfs2_quota_unlock) called
qd_check_sync, after which they both called bh_get, and if that failed,
they took the same steps to undo the actions of qd_check_sync.

This patch introduces a new function, qd_bh_get_or_undo, which performs
the same steps, reducing code redundancy.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Bob Peterson 2023-06-23 08:07:55 -05:00 committed by Andreas Gruenbacher
parent 3932e50730
commit 7dbc6ae60d
1 changed files with 19 additions and 17 deletions
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36
fs/gfs2/quota.c
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@ -473,6 +473,20 @@ static int qd_check_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
return 1;
}
static int qd_bh_get_or_undo(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
{
int error;
error = bh_get(qd);
if (!error)
return 0;
clear_bit(QDF_LOCKED, &qd->qd_flags);
slot_put(qd);
qd_put(qd);
return error;
}
static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
{
struct gfs2_quota_data *qd = NULL, *iter;
@ -495,17 +509,12 @@ static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
spin_unlock(&qd_lock);
if (qd) {
error = bh_get(qd);
if (error) {
clear_bit(QDF_LOCKED, &qd->qd_flags);
slot_put(qd);
qd_put(qd);
error = qd_bh_get_or_undo(sdp, qd);
if (error)
return error;
}
*qdp = qd;
}
*qdp = qd;
return 0;
}
@ -1164,15 +1173,8 @@ void gfs2_quota_unlock(struct gfs2_inode *ip)
if (!found)
continue;
gfs2_assert_warn(sdp, qd->qd_change_sync);
if (bh_get(qd)) {
clear_bit(QDF_LOCKED, &qd->qd_flags);
slot_put(qd);
qd_put(qd);
continue;
}
qda[count++] = qd;
if (!qd_bh_get_or_undo(sdp, qd))
qda[count++] = qd;
}
if (count) {