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Date: Tue, 20 Aug 2013 21:38:13 +0800
From: Zheng Liu <gnehzuil.liu@...il.com>
To: linux-ext4@...r.kernel.org
Cc: "Theodore Ts'o" <tytso@....edu>, Zheng Liu <wenqing.lz@...bao.com>
Subject: [PATCH] ext4: isolate ext4_extents.h file
From: Zheng Liu <wenqing.lz@...bao.com>
After applied the commit (4a092d73), we have reduced the number of
source files that need to #include ext4_extents.h. But we can do
better.
This commit defines ext4_zeroout_es() in extents.c and move
EXT_MAX_BLOCKS into ext4.h in order not to include ext4_extents.h in
indirect.c and ioctl.c. Meanwhile we just need to include this file in
extent_status.c when ES_AGGRESSIVE_TEST is defined. Otherwise, this
commit removes a duplicated declaration in trace/events/ext4.h.
After applied this patch, we just need to include ext4_extents.h file
in {super,migrate,move_extents,extents}.c, and it is easy for us to
define a new extent disk layout.
Cc: "Theodore Ts'o" <tytso@....edu>
Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>
---
fs/ext4/ext4.h | 6 ++++++
fs/ext4/ext4_extents.h | 6 ------
fs/ext4/extents.c | 21 +++++++++++++++++++--
fs/ext4/extents_status.c | 20 ++------------------
fs/ext4/extents_status.h | 1 -
fs/ext4/indirect.c | 1 -
fs/ext4/ioctl.c | 1 -
include/trace/events/ext4.h | 1 -
8 files changed, 27 insertions(+), 30 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 3dbc56e..2889665 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2686,6 +2686,12 @@ extern int ext4_check_blockref(const char *, unsigned int,
struct ext4_ext_path;
struct ext4_extent;
+/*
+ * Maximum number of logical blocks in a file; ext4_extent's ee_block is
+ * __le32.
+ */
+#define EXT_MAX_BLOCKS 0xffffffff
+
extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents);
diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h
index 51bc821..5074fe2 100644
--- a/fs/ext4/ext4_extents.h
+++ b/fs/ext4/ext4_extents.h
@@ -134,12 +134,6 @@ struct ext4_ext_path {
*/
/*
- * Maximum number of logical blocks in a file; ext4_extent's ee_block is
- * __le32.
- */
-#define EXT_MAX_BLOCKS 0xffffffff
-
-/*
* EXT_INIT_MAX_LEN is the maximum number of blocks we can have in an
* initialized extent. This is 2^15 and not (2^16 - 1), since we use the
* MSB of ee_len field in the extent datastructure to signify if this
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 62b21cc..3ae9c31 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3049,6 +3049,23 @@ void ext4_ext_release(struct super_block *sb)
#endif
}
+static int ext4_zeroout_es(struct inode *inode, struct ext4_extent *ex)
+{
+ ext4_lblk_t ee_block;
+ ext4_fsblk_t ee_pblock;
+ unsigned int ee_len;
+
+ ee_block = le32_to_cpu(ex->ee_block);
+ ee_len = ext4_ext_get_actual_len(ex);
+ ee_pblock = ext4_ext_pblock(ex);
+
+ if (ee_len == 0)
+ return 0;
+
+ return ext4_es_insert_extent(inode, ee_block, ee_len, ee_pblock,
+ EXTENT_STATUS_WRITTEN);
+}
+
/* FIXME!! we need to try to merge to left or right after zero-out */
static int ext4_ext_zeroout(struct inode *inode, struct ext4_extent *ex)
{
@@ -3201,7 +3218,7 @@ static int ext4_split_extent_at(handle_t *handle,
goto fix_extent_len;
/* update extent status tree */
- err = ext4_es_zeroout(inode, &zero_ex);
+ err = ext4_zeroout_es(inode, &zero_ex);
goto out;
} else if (err)
@@ -3552,7 +3569,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
out:
/* If we have gotten a failure, don't zero out status tree */
if (!err)
- err = ext4_es_zeroout(inode, &zero_ex);
+ err = ext4_zeroout_es(inode, &zero_ex);
return err ? err : allocated;
}
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index 0e88a36..2d1bdbe 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -13,7 +13,6 @@
#include <linux/list_sort.h>
#include "ext4.h"
#include "extents_status.h"
-#include "ext4_extents.h"
#include <trace/events/ext4.h>
@@ -409,6 +408,8 @@ ext4_es_try_to_merge_right(struct inode *inode, struct extent_status *es)
}
#ifdef ES_AGGRESSIVE_TEST
+#include "ext4_extents.h" /* Needed when ES_AGGRESSIVE_TEST is defined */
+
static void ext4_es_insert_extent_ext_check(struct inode *inode,
struct extent_status *es)
{
@@ -903,23 +904,6 @@ int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
return err;
}
-int ext4_es_zeroout(struct inode *inode, struct ext4_extent *ex)
-{
- ext4_lblk_t ee_block;
- ext4_fsblk_t ee_pblock;
- unsigned int ee_len;
-
- ee_block = le32_to_cpu(ex->ee_block);
- ee_len = ext4_ext_get_actual_len(ex);
- ee_pblock = ext4_ext_pblock(ex);
-
- if (ee_len == 0)
- return 0;
-
- return ext4_es_insert_extent(inode, ee_block, ee_len, ee_pblock,
- EXTENT_STATUS_WRITTEN);
-}
-
static int ext4_inode_touch_time_cmp(void *priv, struct list_head *a,
struct list_head *b)
{
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
index 3e83aef..167f4ab8 100644
--- a/fs/ext4/extents_status.h
+++ b/fs/ext4/extents_status.h
@@ -81,7 +81,6 @@ extern void ext4_es_find_delayed_extent_range(struct inode *inode,
struct extent_status *es);
extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk,
struct extent_status *es);
-extern int ext4_es_zeroout(struct inode *inode, struct ext4_extent *ex);
static inline int ext4_es_is_written(struct extent_status *es)
{
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 87b30cd..594009f 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -23,7 +23,6 @@
#include <linux/aio.h>
#include "ext4_jbd2.h"
#include "truncate.h"
-#include "ext4_extents.h" /* Needed for EXT_MAX_BLOCKS */
#include <trace/events/ext4.h>
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 5498f75..a569d33 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -17,7 +17,6 @@
#include <asm/uaccess.h>
#include "ext4_jbd2.h"
#include "ext4.h"
-#include "ext4_extents.h"
#define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1)
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index d892b55..197d312 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -14,7 +14,6 @@ struct ext4_prealloc_space;
struct ext4_inode_info;
struct mpage_da_data;
struct ext4_map_blocks;
-struct ext4_extent;
struct extent_status;
#define EXT4_I(inode) (container_of(inode, struct ext4_inode_info, vfs_inode))
--
1.7.9.7
--
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