1 files changed, 40 insertions, 0 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index b364b9df09b3..0fe078d368d0 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -890,6 +890,7 @@ struct ext4_inode_info {
 #define EXT4_MOUNT_DATA_ERR_ABORT       0x10000000 /* Abort on file data write */
 #define EXT4_MOUNT_BLOCK_VALIDITY       0x20000000 /* Block validity checking */
 #define EXT4_MOUNT_DISCARD              0x40000000 /* Issue DISCARD requests */
+#define EXT4_MOUNT_INIT_INODE_TABLE     0x80000000 /* Initialize uninitialized itables */
 
 #define clear_opt(o, opt)               o &= ~EXT4_MOUNT_##opt
 #define set_opt(o, opt)                 o |= EXT4_MOUNT_##opt
@@ -1173,6 +1174,11 @@ struct ext4_sb_info {
 
         /* timer for periodic error stats printing */
         struct timer_list s_err_report;
+
+        /* Lazy inode table initialization info */
+        struct ext4_li_request *s_li_request;
+        /* Wait multiplier for lazy initialization thread */
+        unsigned int s_li_wait_mult;
 };
 
 static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
@@ -1537,6 +1543,38 @@ void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
 extern struct proc_dir_entry *ext4_proc_root;
 
 /*
+ * Timeout and state flag for lazy initialization inode thread.
+ */
+#define EXT4_DEF_LI_WAIT_MULT                   10
+#define EXT4_DEF_LI_MAX_START_DELAY             5
+#define EXT4_LAZYINIT_QUIT                      0x0001
+#define EXT4_LAZYINIT_RUNNING                   0x0002
+
+/*
+ * Lazy inode table initialization info
+ */
+struct ext4_lazy_init {
+        unsigned long           li_state;
+
+        wait_queue_head_t       li_wait_daemon;
+        wait_queue_head_t       li_wait_task;
+        struct timer_list       li_timer;
+        struct task_struct      *li_task;
+
+        struct list_head        li_request_list;
+        struct mutex            li_list_mtx;
+};
+
+struct ext4_li_request {
+        struct super_block      *lr_super;
+        struct ext4_sb_info     *lr_sbi;
+        ext4_group_t            lr_next_group;
+        struct list_head        lr_request;
+        unsigned long           lr_next_sched;
+        unsigned long           lr_timeout;
+};
+
+/*
  * Function prototypes
  */
 
@@ -1611,6 +1649,8 @@ extern unsigned ext4_init_inode_bitmap(struct super_block *sb,
                                        ext4_group_t group,
                                        struct ext4_group_desc *desc);
 extern void mark_bitmap_end(int start_bit, int end_bit, char *bitmap);
+extern int ext4_init_inode_table(struct super_block *sb,
+                                 ext4_group_t group, int barrier);
 
 /* mballoc.c */
 extern long ext4_mb_stats;