4 files changed, 39 insertions, 3 deletions

diff --git a/fs/Kconfig b/fs/Kconfig
index c1ce3d8831d8..f9b6e2979aaa 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -189,6 +189,8 @@ config OCFS2_FS
         select CONFIGFS_FS
         select JBD2
         select CRC32
+        select QUOTA
+        select QUOTA_TREE
         help
           OCFS2 is a general purpose extent based shared disk cluster file
           system with many similarities to ext3. It supports 64 bit inode
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index ec3497bafda6..ec25d9984192 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -283,6 +283,8 @@ void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
                 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
         } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
+        } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
+                inode->i_flags |= S_NOQUOTA;
         } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
                 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
                 /* we can't actually hit this as read_inode can't
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index 5e0c0d0aef7d..06e3bd632ff3 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -94,7 +94,7 @@
                                          | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP \
                                          | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK \
                                          | OCFS2_FEATURE_INCOMPAT_XATTR)
-#define OCFS2_FEATURE_RO_COMPAT_SUPP    OCFS2_FEATURE_RO_COMPAT_UNWRITTEN
+#define OCFS2_FEATURE_RO_COMPAT_SUPP    (OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
 
 /*
  * Heartbeat-only devices are missing journals and other files.  The
@@ -163,6 +163,12 @@
  */
 #define OCFS2_FEATURE_RO_COMPAT_UNWRITTEN       0x0001
 
+/*
+ * Maintain quota information for this filesystem
+ */
+#define OCFS2_FEATURE_RO_COMPAT_USRQUOTA        0x0002
+#define OCFS2_FEATURE_RO_COMPAT_GRPQUOTA        0x0004
+
 /* The byte offset of the first backup block will be 1G.
  * The following will be 4G, 16G, 64G, 256G and 1T.
  */
@@ -192,6 +198,7 @@
 #define OCFS2_HEARTBEAT_FL      (0x00000200)    /* Heartbeat area */
 #define OCFS2_CHAIN_FL          (0x00000400)    /* Chain allocator */
 #define OCFS2_DEALLOC_FL        (0x00000800)    /* Truncate log */
+#define OCFS2_QUOTA_FL          (0x00001000)    /* Quota file */
 
 /*
  * Flags on ocfs2_dinode.i_dyn_features
@@ -329,13 +336,17 @@ enum {
 #define OCFS2_FIRST_ONLINE_SYSTEM_INODE SLOT_MAP_SYSTEM_INODE
         HEARTBEAT_SYSTEM_INODE,
         GLOBAL_BITMAP_SYSTEM_INODE,
-#define OCFS2_LAST_GLOBAL_SYSTEM_INODE GLOBAL_BITMAP_SYSTEM_INODE
+        USER_QUOTA_SYSTEM_INODE,
+        GROUP_QUOTA_SYSTEM_INODE,
+#define OCFS2_LAST_GLOBAL_SYSTEM_INODE GROUP_QUOTA_SYSTEM_INODE
         ORPHAN_DIR_SYSTEM_INODE,
         EXTENT_ALLOC_SYSTEM_INODE,
         INODE_ALLOC_SYSTEM_INODE,
         JOURNAL_SYSTEM_INODE,
         LOCAL_ALLOC_SYSTEM_INODE,
         TRUNCATE_LOG_SYSTEM_INODE,
+        LOCAL_USER_QUOTA_SYSTEM_INODE,
+        LOCAL_GROUP_QUOTA_SYSTEM_INODE,
         NUM_SYSTEM_INODES
 };
 
@@ -349,6 +360,8 @@ static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = {
         [SLOT_MAP_SYSTEM_INODE]                 = { "slot_map", 0, S_IFREG | 0644 },
         [HEARTBEAT_SYSTEM_INODE]                = { "heartbeat", OCFS2_HEARTBEAT_FL, S_IFREG | 0644 },
         [GLOBAL_BITMAP_SYSTEM_INODE]            = { "global_bitmap", 0, S_IFREG | 0644 },
+        [USER_QUOTA_SYSTEM_INODE]               = { "aquota.user", OCFS2_QUOTA_FL, S_IFREG | 0644 },
+        [GROUP_QUOTA_SYSTEM_INODE]              = { "aquota.group", OCFS2_QUOTA_FL, S_IFREG | 0644 },
 
         /* Slot-specific system inodes (one copy per slot) */
         [ORPHAN_DIR_SYSTEM_INODE]               = { "orphan_dir:%04d", 0, S_IFDIR | 0755 },
@@ -356,7 +369,9 @@ static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = {
         [INODE_ALLOC_SYSTEM_INODE]              = { "inode_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
         [JOURNAL_SYSTEM_INODE]                  = { "journal:%04d", OCFS2_JOURNAL_FL, S_IFREG | 0644 },
         [LOCAL_ALLOC_SYSTEM_INODE]              = { "local_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_LOCAL_ALLOC_FL, S_IFREG | 0644 },
-        [TRUNCATE_LOG_SYSTEM_INODE]             = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 }
+        [TRUNCATE_LOG_SYSTEM_INODE]             = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 },
+        [LOCAL_USER_QUOTA_SYSTEM_INODE]         = { "aquota.user:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 },
+        [LOCAL_GROUP_QUOTA_SYSTEM_INODE]        = { "aquota.group:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 },
 };
 
 /* Parameter passed from mount.ocfs2 to module */
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 9e7accc68b4b..41bb0197cf4c 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -225,6 +225,19 @@ static int ocfs2_sync_fs(struct super_block *sb, int wait)
         return 0;
 }
 
+static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
+{
+        if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
+            && (ino == USER_QUOTA_SYSTEM_INODE
+                || ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
+                return 0;
+        if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
+            && (ino == GROUP_QUOTA_SYSTEM_INODE
+                || ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
+                return 0;
+        return 1;
+}
+
 static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
 {
         struct inode *new = NULL;
@@ -251,6 +264,8 @@ static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
 
         for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
              i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
+                if (!ocfs2_need_system_inode(osb, i))
+                        continue;
                 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
                 if (!new) {
                         ocfs2_release_system_inodes(osb);
@@ -281,6 +296,8 @@ static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
         for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
              i < NUM_SYSTEM_INODES;
              i++) {
+                if (!ocfs2_need_system_inode(osb, i))
+                        continue;
                 new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
                 if (!new) {
                         ocfs2_release_system_inodes(osb);