PERFORCE change 180987 for review

[Zheng Liu]

http://p4web.freebsd.org/@@180987?ac=10

Change 180987 by lz at gnehzuil-freebsd on 2010/07/15 11:12:04

	       Implement a ext4 cache.

Affected files ...

.. //depot/projects/soc2010/ext4fs/src/sys/fs/ext2fs/ext2_extents.c#7 edit
.. //depot/projects/soc2010/ext4fs/src/sys/fs/ext2fs/ext2_extents.h#5 edit
.. //depot/projects/soc2010/ext4fs/src/sys/fs/ext2fs/ext2_readwrite.c#8 edit

Differences ...

==== //depot/projects/soc2010/ext4fs/src/sys/fs/ext2fs/ext2_extents.c#7 (text+ko) ====

@@ -118,6 +118,21 @@
 }
 
 /*
+ * put a ext4_extent structure in ext4 cache.
+ */
+void
+ext4_ext_put_cache(struct inode *ip, struct ext4_extent *ep, int type)
+{
+        struct ext4_extent_cache *ecp;
+
+        ecp = &ip->i_ext_cache;
+        ecp->ec_type = type;
+        ecp->ec_blk = ep->e_blk;
+        ecp->ec_len = ep->e_len;
+        ecp->ec_start = (((daddr_t)(ep->e_start_hi) << 31) << 1) | ep->e_start_lo;
+}
+
+/*
  * find a extent.
  */
 struct ext4_extent_path *

==== //depot/projects/soc2010/ext4fs/src/sys/fs/ext2fs/ext2_extents.h#5 (text+ko) ====

@@ -94,8 +94,9 @@
 
 struct inode;
 struct m_ext2fs;
-int ext4_ext_in_cache(struct inode *, daddr_t, struct ext4_extent *);
-struct ext4_extent_path *ext4_ext_find_extent(struct m_ext2fs *fs, struct inode *,
-                                              daddr_t, struct ext4_extent_path *);
+int     ext4_ext_in_cache(struct inode *, daddr_t, struct ext4_extent *);
+void    ext4_ext_put_cache(struct inode *, struct ext4_extent *, int);
+struct  ext4_extent_path *ext4_ext_find_extent(struct m_ext2fs *fs, struct inode *,
+                                               daddr_t, struct ext4_extent_path *);
 
 #endif /* !_FS_EXT2FS_EXT2_EXTENTS_H_ */

==== //depot/projects/soc2010/ext4fs/src/sys/fs/ext2fs/ext2_readwrite.c#8 (text+ko) ====

@@ -122,6 +122,8 @@
                         if (ep == NULL)
                                 return (EIO);
 
+                        ext4_ext_put_cache(ip, ep, EXT4_EXT_CACHE_IN);
+
                         newblk = lbn - ep->e_blk +
                             (ep->e_start_lo | ((daddr_t)(ep->e_start_hi) << 31) << 1);
                 }