6.6-stable review patch. If anyone has any objections, please let me know.
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From: Andreas Gruenbacher agruenba@redhat.com
[ Upstream commit ec4b5200c8af9ce021399d3192b3379c089396c3 ]
Commit 432928c93779 ("gfs2: Add quota_change type") makes the incorrect assertion that function do_qc() should behave differently in the two contexts it is used in, but that isn't actually true. In all cases, do_qc() grabs a "reference" when it starts using a slot in the per-node quota changes file, and it releases that "reference" when no more residual changes remain. Revert that broken commit.
There are some remaining issues with function do_qc() which are addressed in the next commit.
This reverts commit 432928c9377959684c748a9bc6553ed2d3c2ea4f.
Signed-off-by: Andreas Gruenbacher agruenba@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/gfs2/quota.c | 19 +++++++------------ fs/gfs2/util.c | 6 +++--- 2 files changed, 10 insertions(+), 15 deletions(-)
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index 892b1c44de53..299b6d6aaa79 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -75,9 +75,6 @@ #define GFS2_QD_HASH_SIZE BIT(GFS2_QD_HASH_SHIFT) #define GFS2_QD_HASH_MASK (GFS2_QD_HASH_SIZE - 1)
-#define QC_CHANGE 0 -#define QC_SYNC 1 - /* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */ /* -> sd_bitmap_lock */ static DEFINE_SPINLOCK(qd_lock); @@ -697,7 +694,7 @@ static int sort_qd(const void *a, const void *b) return 0; }
-static void do_qc(struct gfs2_quota_data *qd, s64 change, int qc_type) +static void do_qc(struct gfs2_quota_data *qd, s64 change) { struct gfs2_sbd *sdp = qd->qd_sbd; struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); @@ -722,18 +719,16 @@ static void do_qc(struct gfs2_quota_data *qd, s64 change, int qc_type) qd->qd_change = x; spin_unlock(&qd_lock);
- if (qc_type == QC_CHANGE) { - if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { - qd_hold(qd); - slot_hold(qd); - } - } else { + if (!x) { gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); clear_bit(QDF_CHANGE, &qd->qd_flags); qc->qc_flags = 0; qc->qc_id = 0; slot_put(qd); qd_put(qd); + } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { + qd_hold(qd); + slot_hold(qd); }
if (change < 0) /* Reset quiet flag if we freed some blocks */ @@ -978,7 +973,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) if (error) goto out_end_trans;
- do_qc(qd, -qd->qd_change_sync, QC_SYNC); + do_qc(qd, -qd->qd_change_sync); set_bit(QDF_REFRESH, &qd->qd_flags); }
@@ -1300,7 +1295,7 @@ void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || qid_eq(qd->qd_id, make_kqid_gid(gid))) { - do_qc(qd, change, QC_CHANGE); + do_qc(qd, change); } } } diff --git a/fs/gfs2/util.c b/fs/gfs2/util.c index fc3ecb180ac5..b65261e0cae3 100644 --- a/fs/gfs2/util.c +++ b/fs/gfs2/util.c @@ -99,12 +99,12 @@ int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd, */ int gfs2_freeze_lock_shared(struct gfs2_sbd *sdp) { + int flags = LM_FLAG_NOEXP | GL_EXACT; int error;
- error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, - LM_FLAG_NOEXP | GL_EXACT, + error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, flags, &sdp->sd_freeze_gh); - if (error) + if (error && error != GLR_TRYFAILED) fs_err(sdp, "can't lock the freeze glock: %d\n", error); return error; }