summaryrefslogtreecommitdiffstats
path: root/fs/gfs2/quota.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/gfs2/quota.c')
-rw-r--r--fs/gfs2/quota.c76
1 files changed, 46 insertions, 30 deletions
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index e9f93045eb01..cc0c4b5800be 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -115,7 +115,7 @@ static void gfs2_qd_dispose(struct list_head *list)
struct gfs2_sbd *sdp;
while (!list_empty(list)) {
- qd = list_entry(list->next, struct gfs2_quota_data, qd_lru);
+ qd = list_first_entry(list, struct gfs2_quota_data, qd_lru);
sdp = qd->qd_gl->gl_name.ln_sbd;
list_del(&qd->qd_lru);
@@ -525,11 +525,11 @@ static void qdsb_put(struct gfs2_quota_data *qd)
}
/**
- * gfs2_qa_alloc - make sure we have a quota allocations data structure,
- * if necessary
+ * gfs2_qa_get - make sure we have a quota allocations data structure,
+ * if necessary
* @ip: the inode for this reservation
*/
-int gfs2_qa_alloc(struct gfs2_inode *ip)
+int gfs2_qa_get(struct gfs2_inode *ip)
{
int error = 0;
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
@@ -540,17 +540,21 @@ int gfs2_qa_alloc(struct gfs2_inode *ip)
down_write(&ip->i_rw_mutex);
if (ip->i_qadata == NULL) {
ip->i_qadata = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS);
- if (!ip->i_qadata)
+ if (!ip->i_qadata) {
error = -ENOMEM;
+ goto out;
+ }
}
+ ip->i_qadata->qa_ref++;
+out:
up_write(&ip->i_rw_mutex);
return error;
}
-void gfs2_qa_delete(struct gfs2_inode *ip, atomic_t *wcount)
+void gfs2_qa_put(struct gfs2_inode *ip)
{
down_write(&ip->i_rw_mutex);
- if (ip->i_qadata && ((wcount == NULL) || (atomic_read(wcount) <= 1))) {
+ if (ip->i_qadata && --ip->i_qadata->qa_ref == 0) {
kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata);
ip->i_qadata = NULL;
}
@@ -566,27 +570,27 @@ int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
return 0;
- if (ip->i_qadata == NULL) {
- error = gfs2_rsqa_alloc(ip);
- if (error)
- return error;
- }
+ error = gfs2_qa_get(ip);
+ if (error)
+ return error;
qd = ip->i_qadata->qa_qd;
if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) ||
- gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)))
- return -EIO;
+ gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) {
+ error = -EIO;
+ goto out;
+ }
error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
if (error)
- goto out;
+ goto out_unhold;
ip->i_qadata->qa_qd_num++;
qd++;
error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
if (error)
- goto out;
+ goto out_unhold;
ip->i_qadata->qa_qd_num++;
qd++;
@@ -594,7 +598,7 @@ int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
!uid_eq(uid, ip->i_inode.i_uid)) {
error = qdsb_get(sdp, make_kqid_uid(uid), qd);
if (error)
- goto out;
+ goto out_unhold;
ip->i_qadata->qa_qd_num++;
qd++;
}
@@ -603,14 +607,15 @@ int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
!gid_eq(gid, ip->i_inode.i_gid)) {
error = qdsb_get(sdp, make_kqid_gid(gid), qd);
if (error)
- goto out;
+ goto out_unhold;
ip->i_qadata->qa_qd_num++;
qd++;
}
-out:
+out_unhold:
if (error)
gfs2_quota_unhold(ip);
+out:
return error;
}
@@ -621,6 +626,7 @@ void gfs2_quota_unhold(struct gfs2_inode *ip)
if (ip->i_qadata == NULL)
return;
+
gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
@@ -628,6 +634,7 @@ void gfs2_quota_unhold(struct gfs2_inode *ip)
ip->i_qadata->qa_qd[x] = NULL;
}
ip->i_qadata->qa_qd_num = 0;
+ gfs2_qa_put(ip);
}
static int sort_qd(const void *a, const void *b)
@@ -876,7 +883,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
unsigned int nalloc = 0, blocks;
int error;
- error = gfs2_rsqa_alloc(ip);
+ error = gfs2_qa_get(ip);
if (error)
return error;
@@ -884,8 +891,10 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
&data_blocks, &ind_blocks);
ghs = kmalloc_array(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
- if (!ghs)
- return -ENOMEM;
+ if (!ghs) {
+ error = -ENOMEM;
+ goto out;
+ }
sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
inode_lock(&ip->i_inode);
@@ -893,12 +902,12 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
GL_NOCACHE, &ghs[qx]);
if (error)
- goto out;
+ goto out_dq;
}
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
if (error)
- goto out;
+ goto out_dq;
for (x = 0; x < num_qd; x++) {
offset = qd2offset(qda[x]);
@@ -950,13 +959,15 @@ out_ipres:
gfs2_inplace_release(ip);
out_alloc:
gfs2_glock_dq_uninit(&i_gh);
-out:
+out_dq:
while (qx--)
gfs2_glock_dq_uninit(&ghs[qx]);
inode_unlock(&ip->i_inode);
kfree(ghs);
gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl,
GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC);
+out:
+ gfs2_qa_put(ip);
return error;
}
@@ -1259,6 +1270,7 @@ void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
if (ip->i_diskflags & GFS2_DIF_SYSTEM)
return;
+ BUG_ON(ip->i_qadata->qa_ref <= 0);
for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
qd = ip->i_qadata->qa_qd[x];
@@ -1441,7 +1453,7 @@ void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
spin_lock(&qd_lock);
while (!list_empty(head)) {
- qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
+ qd = list_last_entry(head, struct gfs2_quota_data, qd_list);
list_del(&qd->qd_list);
@@ -1476,8 +1488,8 @@ static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
if (error == 0 || error == -EROFS)
return;
if (!gfs2_withdrawn(sdp)) {
- fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
- sdp->sd_log_error = error;
+ if (!cmpxchg(&sdp->sd_log_error, 0, error))
+ fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
wake_up(&sdp->sd_logd_waitq);
}
}
@@ -1504,7 +1516,7 @@ static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
ip = NULL;
spin_lock(&sdp->sd_trunc_lock);
if (!list_empty(&sdp->sd_trunc_list)) {
- ip = list_entry(sdp->sd_trunc_list.next,
+ ip = list_first_entry(&sdp->sd_trunc_list,
struct gfs2_inode, i_trunc_list);
list_del_init(&ip->i_trunc_list);
}
@@ -1541,6 +1553,8 @@ int gfs2_quotad(void *data)
while (!kthread_should_stop()) {
+ if (gfs2_withdrawn(sdp))
+ goto bypass;
/* Update the master statfs file */
if (sdp->sd_statfs_force_sync) {
int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
@@ -1561,6 +1575,7 @@ int gfs2_quotad(void *data)
try_to_freeze();
+bypass:
t = min(quotad_timeo, statfs_timeo);
prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
@@ -1674,7 +1689,7 @@ static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
if (error)
return error;
- error = gfs2_rsqa_alloc(ip);
+ error = gfs2_qa_get(ip);
if (error)
goto out_put;
@@ -1743,6 +1758,7 @@ out_i:
out_q:
gfs2_glock_dq_uninit(&q_gh);
out_unlockput:
+ gfs2_qa_put(ip);
inode_unlock(&ip->i_inode);
out_put:
qd_put(qd);
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-12 06:05:14 +0100