To make ubifs support quota, we have to provide a qctl_operations
to quotactl. But we can not use the default operations. The problem
is quota_off function. We have to do a budget at first before
disabling quota.
Signed-off-by: Dongsheng Yang <yangds.fnst@xxxxxxxxxxxxxx>
---
fs/ubifs/super.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 60deed2..00451b0 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2278,6 +2278,62 @@ static struct ubifs_info *alloc_ubifs_info(struct ubi_volume_desc *ubi)
return c;
}
+#ifdef CONFIG_QUOTA
+static int ubifs_quota_off(struct super_block *sb, int type)
+{
+ struct ubifs_budget_req req = {};
+ struct ubifs_info *c = sb->s_fs_info;
+ struct quota_info *dqopt = sb_dqopt(sb);
+ struct inode *inodes[MAXQUOTAS] = {};
+ struct inode *tmp = NULL;
+ struct ubifs_inode *ui = NULL;
+ int ret = 0;
+ int cnt = 0;
+
+ if (type == -1) {
+ for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
+ if (!sb_has_quota_loaded(sb, cnt))
+ continue;
+ req.dirtied_ino += 1;
+ inodes[cnt] = dqopt->files[cnt];
+ }
+ } else {
+ if (sb_has_quota_loaded(sb, type)) {
+ req.dirtied_ino = 1;
+ inodes[cnt] = dqopt->files[type];
+ }
+ }
+
+ if (req.dirtied_ino) {
+ ret = ubifs_budget_space(c, &req);
+ if (ret)
+ return ret;
+ }
+
+ for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
+ tmp = inodes[cnt];
+ if (!tmp)
+ break;
+ ui = ubifs_inode(tmp);
+ mutex_lock(&ui->ui_mutex);
+ ui->budgeted = 1;
+ mutex_unlock(&ui->ui_mutex);
+ }
+
+ return dquot_disable(sb, type, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
+}
+
+static const struct quotactl_ops ubifs_qctl_operations = {
+ .quota_on = dquot_quota_on,
+ .quota_off = ubifs_quota_off,
+ .quota_sync = dquot_quota_sync,
+ .get_state = dquot_get_state,
+ .set_info = dquot_set_dqinfo,
+ .get_dqblk = dquot_get_dqblk,
+ .set_dqblk = dquot_set_dqblk
+};
+#endif
+
static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
{
struct ubifs_info *c = sb->s_fs_info;
--
1.8.4.2
--
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