2 files changed, 10 insertions, 4 deletions

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 5ec59b20cf76..46741970371b 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2125,6 +2125,8 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id,
                 mutex_unlock(&dqopt->dqio_mutex);
                 goto out_file_init;
         }
+        if (dqopt->flags & DQUOT_QUOTA_SYS_FILE)
+                dqopt->info[type].dqi_flags |= DQF_SYS_FILE;
         mutex_unlock(&dqopt->dqio_mutex);
         spin_lock(&dq_state_lock);
         dqopt->flags |= dquot_state_flag(flags, type);
@@ -2464,7 +2466,7 @@ int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii)
         spin_lock(&dq_data_lock);
         ii->dqi_bgrace = mi->dqi_bgrace;
         ii->dqi_igrace = mi->dqi_igrace;
-        ii->dqi_flags = mi->dqi_flags & DQF_MASK;
+        ii->dqi_flags = mi->dqi_flags & DQF_GETINFO_MASK;
         ii->dqi_valid = IIF_ALL;
         spin_unlock(&dq_data_lock);
         mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
@@ -2490,8 +2492,8 @@ int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii)
         if (ii->dqi_valid & IIF_IGRACE)
                 mi->dqi_igrace = ii->dqi_igrace;
         if (ii->dqi_valid & IIF_FLAGS)
-                mi->dqi_flags = (mi->dqi_flags & ~DQF_MASK) |
-                                (ii->dqi_flags & DQF_MASK);
+                mi->dqi_flags = (mi->dqi_flags & ~DQF_SETINFO_MASK) |
+                                (ii->dqi_flags & DQF_SETINFO_MASK);
         spin_unlock(&dq_data_lock);
         mark_info_dirty(sb, type);
         /* Force write to disk */
diff --git a/include/linux/quota.h b/include/linux/quota.h
index cb7855699037..c09fa042b5ea 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -230,7 +230,11 @@ struct mem_dqinfo {
 struct super_block;
 
 #define DQF_MASK 0xffff         /* Mask for format specific flags */
-#define DQF_INFO_DIRTY_B 16
+#define DQF_GETINFO_MASK 0x1ffff        /* Mask for flags passed to userspace */
+#define DQF_SETINFO_MASK 0xffff         /* Mask for flags modifiable from userspace */
+#define DQF_SYS_FILE_B          16
+#define DQF_SYS_FILE (1 << DQF_SYS_FILE_B)      /* Quota file stored as system file */
+#define DQF_INFO_DIRTY_B        31
 #define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B)  /* Is info dirty? */
 
 extern void mark_info_dirty(struct super_block *sb, int type);