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ext4: isolate ext4_extents.h file

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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.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Zheng Liu
2013-08-28 14:47:06 -04:00
committed by Theodore Ts'o
parent 70261f568f
commit d7b2a00c2e
8 changed files with 27 additions and 30 deletions
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6
fs/ext4/ext4.h
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@ -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);