ocfs2: move ip_last_trans to struct ocfs2_caching_info

We have the read side of metadata caching isolated to struct
ocfs2_caching_info, now we need the write side.  This means the journal
functions.  The journal only does a couple of things with struct inode.

This change moves the ip_last_trans field onto struct
ocfs2_caching_info as ci_last_trans.  This field tells the journal
whether a pending journal flush is required.

Signed-off-by: Joel Becker <joel.becker@oracle.com>

7 files changed, 28 insertions, 10 deletions

diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 1c9713cceb39..a47750dea059 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -1112,7 +1112,7 @@ void ocfs2_clear_inode(struct inode *inode)
         ocfs2_lock_res_free(&oi->ip_inode_lockres);
         ocfs2_lock_res_free(&oi->ip_open_lockres);
 
-        ocfs2_metadata_cache_purge(INODE_CACHE(inode));
+        ocfs2_metadata_cache_exit(INODE_CACHE(inode));
 
         mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached,
                         "Clear inode of %llu, inode has %u cache items\n",
@@ -1148,7 +1148,6 @@ void ocfs2_clear_inode(struct inode *inode)
         /* Clear all other flags. */
         oi->ip_flags = 0;
         oi->ip_created_trans = 0;
-        oi->ip_last_trans = 0;
         oi->ip_dir_start_lookup = 0;
         oi->ip_blkno = 0ULL;
 
diff --git a/fs/ocfs2/inode.h b/fs/ocfs2/inode.h
index b0a71b22712c..2cae2514e7fb 100644
--- a/fs/ocfs2/inode.h
+++ b/fs/ocfs2/inode.h
@@ -63,8 +63,6 @@ struct ocfs2_inode_info
         /* next two are protected by trans_inc_lock */
         /* which transaction were we created on? Zero if none. */
         unsigned long                   ip_created_trans;
-        /* last transaction we were a part of. */
-        unsigned long                   ip_last_trans;
 
         struct ocfs2_caching_info       ip_metadata_cache;
 
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
index 2c3222aec622..d4ac19739d7c 100644
--- a/fs/ocfs2/journal.h
+++ b/fs/ocfs2/journal.h
@@ -94,7 +94,7 @@ static inline void ocfs2_set_inode_lock_trans(struct ocfs2_journal *journal,
                                               struct inode *inode)
 {
         spin_lock(&trans_inc_lock);
-        OCFS2_I(inode)->ip_last_trans = journal->j_trans_id;
+        INODE_CACHE(inode)->ci_last_trans = journal->j_trans_id;
         spin_unlock(&trans_inc_lock);
 }
 
@@ -109,7 +109,8 @@ static inline int ocfs2_inode_fully_checkpointed(struct inode *inode)
         struct ocfs2_journal *journal = OCFS2_SB(inode->i_sb)->journal;
 
         spin_lock(&trans_inc_lock);
-        ret = time_after(journal->j_trans_id, OCFS2_I(inode)->ip_last_trans);
+        ret = time_after(journal->j_trans_id,
+                         INODE_CACHE(inode)->ci_last_trans);
         spin_unlock(&trans_inc_lock);
         return ret;
 }
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 6e54a496299e..c9bd7ce30ba6 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -77,6 +77,10 @@ struct ocfs2_caching_info {
          */
         const struct ocfs2_caching_operations *ci_ops;
 
+        /* last transaction we were a part of. */
+        unsigned long           ci_last_trans;
+
+        /* Cache structures */
         unsigned int            ci_flags;
         unsigned int            ci_num_cached;
         union {
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index af118ad98c58..4212547e78a2 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1669,7 +1669,6 @@ static void ocfs2_inode_init_once(void *data)
         ocfs2_extent_map_init(&oi->vfs_inode);
         INIT_LIST_HEAD(&oi->ip_io_markers);
         oi->ip_created_trans = 0;
-        oi->ip_last_trans = 0;
         oi->ip_dir_start_lookup = 0;
 
         init_rwsem(&oi->ip_alloc_sem);
diff --git a/fs/ocfs2/uptodate.c b/fs/ocfs2/uptodate.c
index 1c829e451019..81c82200b908 100644
--- a/fs/ocfs2/uptodate.c
+++ b/fs/ocfs2/uptodate.c
@@ -118,16 +118,32 @@ void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci)
 }
 
 
+static void ocfs2_metadata_cache_reset(struct ocfs2_caching_info *ci,
+                                       int clear)
+{
+        ci->ci_flags |= OCFS2_CACHE_FL_INLINE;
+        ci->ci_num_cached = 0;
+
+        if (clear)
+                ci->ci_last_trans = 0;
+}
+
 void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci,
                                const struct ocfs2_caching_operations *ops)
 {
         BUG_ON(!ops);
 
         ci->ci_ops = ops;
-        ci->ci_flags |= OCFS2_CACHE_FL_INLINE;
-        ci->ci_num_cached = 0;
+        ocfs2_metadata_cache_reset(ci, 1);
+}
+
+void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci)
+{
+        ocfs2_metadata_cache_purge(ci);
+        ocfs2_metadata_cache_reset(ci, 1);
 }
 
+
 /* No lock taken here as 'root' is not expected to be visible to other
  * processes. */
 static unsigned int ocfs2_purge_copied_metadata_tree(struct rb_root *root)
@@ -177,7 +193,7 @@ void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci)
         if (tree)
                 root = ci->ci_cache.ci_tree;
 
-        ocfs2_metadata_cache_init(ci, ci->ci_ops);
+        ocfs2_metadata_cache_reset(ci, 0);
         ocfs2_metadata_cache_unlock(ci);
 
         purged = ocfs2_purge_copied_metadata_tree(&root);
diff --git a/fs/ocfs2/uptodate.h b/fs/ocfs2/uptodate.h
index f268273d6516..80dbb1db0a5a 100644
--- a/fs/ocfs2/uptodate.h
+++ b/fs/ocfs2/uptodate.h
@@ -61,6 +61,7 @@ void exit_ocfs2_uptodate_cache(void);
 void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci,
                                const struct ocfs2_caching_operations *ops);
 void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci);
+void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci);
 
 u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci);
 struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci);