1 files changed, 50 insertions, 10 deletions

diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 0b52924a0cb6..d087c2e7b2aa 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -94,7 +94,7 @@ extern void jbd2_free(void *ptr, size_t size);
  *
  * This is an opaque datatype.
  **/
-typedef struct handle_s         handle_t;       /* Atomic operation type */
+typedef struct jbd2_journal_handle handle_t;    /* Atomic operation type */
 
 
 /**
@@ -395,7 +395,7 @@ struct jbd2_inode {
         struct inode *i_vfs_inode;
 
         /* Flags of inode [j_list_lock] */
-        unsigned int i_flags;
+        unsigned long i_flags;
 };
 
 struct jbd2_revoke_table_s;
@@ -416,7 +416,7 @@ struct jbd2_revoke_table_s;
  * in so it can be fixed later.
  */
 
-struct handle_s
+struct jbd2_journal_handle
 {
         /* Which compound transaction is this update a part of? */
         transaction_t           *h_transaction;
@@ -432,13 +432,35 @@ struct handle_s
         int                     h_err;
 
         /* Flags [no locking] */
-        unsigned int    h_sync:         1;      /* sync-on-close */
-        unsigned int    h_jdata:        1;      /* force data journaling */
-        unsigned int    h_aborted:      1;      /* fatal error on handle */
+        unsigned int    h_sync:1;       /* sync-on-close */
+        unsigned int    h_jdata:1;      /* force data journaling */
+        unsigned int    h_aborted:1;    /* fatal error on handle */
+        unsigned int    h_cowing:1;     /* COWing block to snapshot */
+
+        /* Number of buffers requested by user:
+         * (before adding the COW credits factor) */
+        unsigned int    h_base_credits:14;
+
+        /* Number of buffers the user is allowed to dirty:
+         * (counts only buffers dirtied when !h_cowing) */
+        unsigned int    h_user_credits:14;
+
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
         struct lockdep_map      h_lockdep_map;
 #endif
+
+#ifdef CONFIG_JBD2_DEBUG
+        /* COW debugging counters: */
+        unsigned int h_cow_moved; /* blocks moved to snapshot */
+        unsigned int h_cow_copied; /* blocks copied to snapshot */
+        unsigned int h_cow_ok_jh; /* blocks already COWed during current
+                                     transaction */
+        unsigned int h_cow_ok_bitmap; /* blocks not set in COW bitmap */
+        unsigned int h_cow_ok_mapped;/* blocks already mapped in snapshot */
+        unsigned int h_cow_bitmaps; /* COW bitmaps created */
+        unsigned int h_cow_excluded; /* blocks set in exclude bitmap */
+#endif
 };
 
 
@@ -507,9 +529,10 @@ struct transaction_s
         enum {
                 T_RUNNING,
                 T_LOCKED,
-                T_RUNDOWN,
                 T_FLUSH,
                 T_COMMIT,
+                T_COMMIT_DFLUSH,
+                T_COMMIT_JFLUSH,
                 T_FINISHED
         }                       t_state;
 
@@ -636,7 +659,9 @@ struct transaction_s
          * waiting for it to finish.
          */
         unsigned int t_synchronous_commit:1;
-        unsigned int t_flushed_data_blocks:1;
+
+        /* Disk flush needs to be sent to fs partition [no locking] */
+        int                     t_need_data_flush;
 
         /*
          * For use by the filesystem to store fs-specific data
@@ -999,7 +1024,6 @@ struct journal_s
 
 /* Filing buffers */
 extern void jbd2_journal_unfile_buffer(journal_t *, struct journal_head *);
-extern void __jbd2_journal_unfile_buffer(struct journal_head *);
 extern void __jbd2_journal_refile_buffer(struct journal_head *);
 extern void jbd2_journal_refile_buffer(journal_t *, struct journal_head *);
 extern void __jbd2_journal_file_buffer(struct journal_head *, transaction_t *, int);
@@ -1140,7 +1164,6 @@ extern void	   jbd2_journal_release_jbd_inode(journal_t *journal, struct jbd2_in
  */
 struct journal_head *jbd2_journal_add_journal_head(struct buffer_head *bh);
 struct journal_head *jbd2_journal_grab_journal_head(struct buffer_head *bh);
-void jbd2_journal_remove_journal_head(struct buffer_head *bh);
 void jbd2_journal_put_journal_head(struct journal_head *jh);
 
 /*
@@ -1158,6 +1181,22 @@ static inline void jbd2_free_handle(handle_t *handle)
         kmem_cache_free(jbd2_handle_cache, handle);
 }
 
+/*
+ * jbd2_inode management (optional, for those file systems that want to use
+ * dynamically allocated jbd2_inode structures)
+ */
+extern struct kmem_cache *jbd2_inode_cache;
+
+static inline struct jbd2_inode *jbd2_alloc_inode(gfp_t gfp_flags)
+{
+        return kmem_cache_alloc(jbd2_inode_cache, gfp_flags);
+}
+
+static inline void jbd2_free_inode(struct jbd2_inode *jinode)
+{
+        kmem_cache_free(jbd2_inode_cache, jinode);
+}
+
 /* Primary revoke support */
 #define JOURNAL_REVOKE_DEFAULT_HASH 256
 extern int         jbd2_journal_init_revoke(journal_t *, int);
@@ -1190,6 +1229,7 @@ int jbd2_journal_start_commit(journal_t *journal, tid_t *tid);
 int jbd2_journal_force_commit_nested(journal_t *journal);
 int jbd2_log_wait_commit(journal_t *journal, tid_t tid);
 int jbd2_log_do_checkpoint(journal_t *journal);
+int jbd2_trans_will_send_data_barrier(journal_t *journal, tid_t tid);
 
 void __jbd2_log_wait_for_space(journal_t *journal);
 extern void __jbd2_journal_drop_transaction(journal_t *, transaction_t *);