From: Baokun Li libaokun1@huawei.com
maillist inclusion category: bugfix bugzilla: 188812,https://gitee.com/openeuler/kernel/issues/I7E0YR CVE: NA
Reference: https://www.spinics.net/lists/kernel/msg4844759.html
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Add new helper function dquot_active() to make the code more concise.
Signed-off-by: Baokun Li libaokun1@huawei.com Reviewed-by: Yang Erkun yangerkun@huawei.com Signed-off-by: Yongqiang Liu liuyongqiang13@huawei.com --- fs/quota/dquot.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index b6eb54095e97..c1c056faea2c 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -336,6 +336,11 @@ static void wait_on_dquot(struct dquot *dquot) mutex_unlock(&dquot->dq_lock); }
+static inline int dquot_active(struct dquot *dquot) +{ + return test_bit(DQ_ACTIVE_B, &dquot->dq_flags); +} + static inline int dquot_dirty(struct dquot *dquot) { return test_bit(DQ_MOD_B, &dquot->dq_flags); @@ -351,14 +356,14 @@ int dquot_mark_dquot_dirty(struct dquot *dquot) { int ret = 1;
- if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) + if (!dquot_active(dquot)) return 0;
if (sb_dqopt(dquot->dq_sb)->flags & DQUOT_NOLIST_DIRTY) return test_and_set_bit(DQ_MOD_B, &dquot->dq_flags);
/* If quota is dirty already, we don't have to acquire dq_list_lock */ - if (test_bit(DQ_MOD_B, &dquot->dq_flags)) + if (dquot_dirty(dquot)) return 1;
spin_lock(&dq_list_lock); @@ -437,7 +442,7 @@ int dquot_acquire(struct dquot *dquot) smp_mb__before_atomic(); set_bit(DQ_READ_B, &dquot->dq_flags); /* Instantiate dquot if needed */ - if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags) && !dquot->dq_off) { + if (!dquot_active(dquot) && !dquot->dq_off) { ret = dqopt->ops[dquot->dq_id.type]->commit_dqblk(dquot); /* Write the info if needed */ if (info_dirty(&dqopt->info[dquot->dq_id.type])) { @@ -476,7 +481,7 @@ int dquot_commit(struct dquot *dquot) goto out_lock; /* Inactive dquot can be only if there was error during read/init * => we have better not writing it */ - if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) + if (dquot_active(dquot)) ret = dqopt->ops[dquot->dq_id.type]->commit_dqblk(dquot); else ret = -EIO; @@ -587,7 +592,7 @@ int dquot_scan_active(struct super_block *sb,
spin_lock(&dq_list_lock); list_for_each_entry(dquot, &inuse_list, dq_inuse) { - if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) + if (!dquot_active(dquot)) continue; if (dquot->dq_sb != sb) continue; @@ -602,7 +607,7 @@ int dquot_scan_active(struct super_block *sb, * outstanding call and recheck the DQ_ACTIVE_B after that. */ wait_on_dquot(dquot); - if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) { + if (dquot_active(dquot)) { ret = fn(dquot, priv); if (ret < 0) goto out; @@ -653,7 +658,7 @@ int dquot_writeback_dquots(struct super_block *sb, int type) dquot = list_first_entry(&dirty, struct dquot, dq_dirty);
- WARN_ON(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)); + WARN_ON(!dquot_active(dquot));
/* Now we have active dquot from which someone is * holding reference so we can safely just increase @@ -790,7 +795,7 @@ void dqput(struct dquot *dquot) dquot_write_dquot(dquot); goto we_slept; } - if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) { + if (dquot_active(dquot)) { spin_unlock(&dq_list_lock); dquot->dq_sb->dq_op->release_dquot(dquot); goto we_slept; @@ -891,7 +896,7 @@ struct dquot *dqget(struct super_block *sb, struct kqid qid) * already finished or it will be canceled due to dq_count > 1 test */ wait_on_dquot(dquot); /* Read the dquot / allocate space in quota file */ - if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) { + if (!dquot_active(dquot)) { int err;
err = sb->dq_op->acquire_dquot(dquot);