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authorAlex Tomas <alex@clusterfs.com>2006-10-11 12:21:03 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-11 22:14:16 +0400
commita86c61812637c7dd0c57e29880cffd477b62f2e7 (patch)
tree10737307293afde2999a887cfeac32c7d7584aa7 /include/linux/ext4_jbd2.h
parentc3fcc8137ce4296ad6ab94f88bd60cbe03d21527 (diff)
downloadlinux-a86c61812637c7dd0c57e29880cffd477b62f2e7.tar.xz
[PATCH] ext3: add extent map support
On disk extents format: /* * this is extent on-disk structure * it's used at the bottom of the tree */ struct ext3_extent { __le32 ee_block; /* first logical block extent covers */ __le16 ee_len; /* number of blocks covered by extent */ __le16 ee_start_hi; /* high 16 bits of physical block */ __le32 ee_start; /* low 32 bigs of physical block */ }; Signed-off-by: Alex Tomas <alex@clusterfs.com> Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/ext4_jbd2.h')
-rw-r--r--include/linux/ext4_jbd2.h15
1 files changed, 10 insertions, 5 deletions
diff --git a/include/linux/ext4_jbd2.h b/include/linux/ext4_jbd2.h
index 99d37557cbb4..aa273f024ad0 100644
--- a/include/linux/ext4_jbd2.h
+++ b/include/linux/ext4_jbd2.h
@@ -26,9 +26,14 @@
*
* We may have to touch one inode, one bitmap buffer, up to three
* indirection blocks, the group and superblock summaries, and the data
- * block to complete the transaction. */
+ * block to complete the transaction.
+ *
+ * For extents-enabled fs we may have to allocate and modify upto
+ * 5 levels of tree + root which is stored in inode. */
-#define EXT4_SINGLEDATA_TRANS_BLOCKS 8U
+#define EXT4_SINGLEDATA_TRANS_BLOCKS(sb) \
+ (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS) \
+ || test_opt(sb, EXTENTS) ? 27U : 8U)
/* Extended attribute operations touch at most two data buffers,
* two bitmap buffers, and two group summaries, in addition to the inode
@@ -42,7 +47,7 @@
* superblock only gets updated once, of course, so don't bother
* counting that again for the quota updates. */
-#define EXT4_DATA_TRANS_BLOCKS(sb) (EXT4_SINGLEDATA_TRANS_BLOCKS + \
+#define EXT4_DATA_TRANS_BLOCKS(sb) (EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + \
EXT4_XATTR_TRANS_BLOCKS - 2 + \
2*EXT4_QUOTA_TRANS_BLOCKS(sb))
@@ -78,9 +83,9 @@
/* Amount of blocks needed for quota insert/delete - we do some block writes
* but inode, sb and group updates are done only once */
#define EXT4_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\
- (EXT4_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0)
+ (EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)+3+DQUOT_INIT_REWRITE) : 0)
#define EXT4_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\
- (EXT4_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0)
+ (EXT4_SINGLEDATA_TRANS_BLOCKS(sb)-3)+3+DQUOT_DEL_REWRITE) : 0)
#else
#define EXT4_QUOTA_TRANS_BLOCKS(sb) 0
#define EXT4_QUOTA_INIT_BLOCKS(sb) 0