提交 ea0f04e5 编写于 作者: C Christoph Hellwig 提交者: Al Viro

get rid of nobh_write_begin_newtrunc

Move the call to vmtruncate to get rid of accessive blocks to the only
remaining caller and rename the non-truncating version to nobh_write_begin.

Get rid of the superflous file argument to it while we're at it.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
上级 eafdc7d1
...@@ -2510,11 +2510,11 @@ static void attach_nobh_buffers(struct page *page, struct buffer_head *head) ...@@ -2510,11 +2510,11 @@ static void attach_nobh_buffers(struct page *page, struct buffer_head *head)
} }
/* /*
* Filesystems implementing the new truncate sequence should use the * On entry, the page is fully not uptodate.
* _newtrunc postfix variant which won't incorrectly call vmtruncate. * On exit the page is fully uptodate in the areas outside (from,to)
* The filesystem needs to handle block truncation upon failure. * The filesystem needs to handle block truncation upon failure.
*/ */
int nobh_write_begin_newtrunc(struct file *file, struct address_space *mapping, int nobh_write_begin(struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags, loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata, struct page **pagep, void **fsdata,
get_block_t *get_block) get_block_t *get_block)
...@@ -2547,7 +2547,7 @@ int nobh_write_begin_newtrunc(struct file *file, struct address_space *mapping, ...@@ -2547,7 +2547,7 @@ int nobh_write_begin_newtrunc(struct file *file, struct address_space *mapping,
unlock_page(page); unlock_page(page);
page_cache_release(page); page_cache_release(page);
*pagep = NULL; *pagep = NULL;
return block_write_begin_newtrunc(file, mapping, pos, len, return block_write_begin_newtrunc(NULL, mapping, pos, len,
flags, pagep, fsdata, get_block); flags, pagep, fsdata, get_block);
} }
...@@ -2654,35 +2654,6 @@ int nobh_write_begin_newtrunc(struct file *file, struct address_space *mapping, ...@@ -2654,35 +2654,6 @@ int nobh_write_begin_newtrunc(struct file *file, struct address_space *mapping,
return ret; return ret;
} }
EXPORT_SYMBOL(nobh_write_begin_newtrunc);
/*
* On entry, the page is fully not uptodate.
* On exit the page is fully uptodate in the areas outside (from,to)
*/
int nobh_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata,
get_block_t *get_block)
{
int ret;
ret = nobh_write_begin_newtrunc(file, mapping, pos, len, flags,
pagep, fsdata, get_block);
/*
* prepare_write() may have instantiated a few blocks
* outside i_size. Trim these off again. Don't need
* i_size_read because we hold i_mutex.
*/
if (unlikely(ret)) {
loff_t isize = mapping->host->i_size;
if (pos + len > isize)
vmtruncate(mapping->host, isize);
}
return ret;
}
EXPORT_SYMBOL(nobh_write_begin); EXPORT_SYMBOL(nobh_write_begin);
int nobh_write_end(struct file *file, struct address_space *mapping, int nobh_write_end(struct file *file, struct address_space *mapping,
......
...@@ -806,13 +806,8 @@ ext2_nobh_write_begin(struct file *file, struct address_space *mapping, ...@@ -806,13 +806,8 @@ ext2_nobh_write_begin(struct file *file, struct address_space *mapping,
{ {
int ret; int ret;
/* ret = nobh_write_begin(mapping, pos, len, flags, pagep, fsdata,
* Dir-in-pagecache still uses ext2_write_begin. Would have to rework ext2_get_block);
* directory handling code to pass around offsets rather than struct
* pages in order to make this work easily.
*/
ret = nobh_write_begin_newtrunc(file, mapping, pos, len, flags, pagep,
fsdata, ext2_get_block);
if (ret < 0) if (ret < 0)
ext2_write_failed(mapping, pos + len); ext2_write_failed(mapping, pos + len);
return ret; return ret;
......
...@@ -303,8 +303,17 @@ static int jfs_write_begin(struct file *file, struct address_space *mapping, ...@@ -303,8 +303,17 @@ static int jfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags, loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata) struct page **pagep, void **fsdata)
{ {
return nobh_write_begin(file, mapping, pos, len, flags, pagep, fsdata, int ret;
ret = nobh_write_begin(mapping, pos, len, flags, pagep, fsdata,
jfs_get_block); jfs_get_block);
if (unlikely(ret)) {
loff_t isize = mapping->host->i_size;
if (pos + len > isize)
vmtruncate(mapping->host, isize);
}
return ret;
} }
static sector_t jfs_bmap(struct address_space *mapping, sector_t block) static sector_t jfs_bmap(struct address_space *mapping, sector_t block)
......
...@@ -231,11 +231,7 @@ void block_sync_page(struct page *); ...@@ -231,11 +231,7 @@ void block_sync_page(struct page *);
sector_t generic_block_bmap(struct address_space *, sector_t, get_block_t *); sector_t generic_block_bmap(struct address_space *, sector_t, get_block_t *);
int block_truncate_page(struct address_space *, loff_t, get_block_t *); int block_truncate_page(struct address_space *, loff_t, get_block_t *);
int file_fsync(struct file *, int); int file_fsync(struct file *, int);
int nobh_write_begin_newtrunc(struct file *, struct address_space *, int nobh_write_begin(struct address_space *, loff_t, unsigned, unsigned,
loff_t, unsigned, unsigned,
struct page **, void **, get_block_t*);
int nobh_write_begin(struct file *, struct address_space *,
loff_t, unsigned, unsigned,
struct page **, void **, get_block_t*); struct page **, void **, get_block_t*);
int nobh_write_end(struct file *, struct address_space *, int nobh_write_end(struct file *, struct address_space *,
loff_t, unsigned, unsigned, loff_t, unsigned, unsigned,
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册