1 files changed, 26 insertions, 7 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 990ceab2e2bc..b7deba7d6a44 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1248,6 +1248,11 @@ static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
                         "quota options when quota turned on");
                 return -1;
         }
+        if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) {
+                ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options "
+                         "when QUOTA feature is enabled");
+                return -1;
+        }
         qname = match_strdup(args);
         if (!qname) {
                 ext4_msg(sb, KERN_ERR,
@@ -1545,6 +1550,13 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
                                  "quota options when quota turned on");
                         return -1;
                 }
+                if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+                                               EXT4_FEATURE_RO_COMPAT_QUOTA)) {
+                        ext4_msg(sb, KERN_ERR,
+                                 "Cannot set journaled quota options "
+                                 "when QUOTA feature is enabled");
+                        return -1;
+                }
                 sbi->s_jquota_fmt = m->mount_opt;
 #endif
         } else {
@@ -1593,6 +1605,12 @@ static int parse_options(char *options, struct super_block *sb,
                         return 0;
         }
 #ifdef CONFIG_QUOTA
+        if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) &&
+            (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) {
+                ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA "
+                         "feature is enabled");
+                return 0;
+        }
         if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
                 if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
                         clear_opt(sb, USRQUOTA);
@@ -3715,13 +3733,11 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
         sb->s_export_op = &ext4_export_ops;
         sb->s_xattr = ext4_xattr_handlers;
 #ifdef CONFIG_QUOTA
-        sb->s_qcop = &ext4_qctl_operations;
         sb->dq_op = &ext4_quota_operations;
-
-        if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) {
-                /* Use qctl operations for hidden quota files. */
+        if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA))
                 sb->s_qcop = &ext4_qctl_sysfile_operations;
-        }
+        else
+                sb->s_qcop = &ext4_qctl_operations;
 #endif
         memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid));
 
@@ -4822,9 +4838,12 @@ static int ext4_release_dquot(struct dquot *dquot)
 
 static int ext4_mark_dquot_dirty(struct dquot *dquot)
 {
+        struct super_block *sb = dquot->dq_sb;
+        struct ext4_sb_info *sbi = EXT4_SB(sb);
+
         /* Are we journaling quotas? */
-        if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
-            EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
+        if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) ||
+            sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
                 dquot_mark_dquot_dirty(dquot);
                 return ext4_write_dquot(dquot);
         } else {