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| author | Christoph Hellwig <hch@lst.de> | 2010-06-04 11:29:56 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2010-08-09 16:47:31 -0400 |
| commit | f4e420dc423148fba637af1ab618fa8896dfb2d6 (patch) | |
| tree | df0e81f5f4b8448dd6b3929e5537dcc46e7d7dde /fs/sysv/itree.c | |
| parent | 282dc178849882289d30e58b54be6b2799b351aa (diff) | |
| download | linux-f4e420dc423148fba637af1ab618fa8896dfb2d6.tar.bz2 | |
clean up write_begin usage for directories in pagecache
For filesystem that implement directories in pagecache we call
block_write_begin with an already allocated page for this code, while the
normal regular file write path uses the default block_write_begin behaviour.
Get rid of the __foofs_write_begin helper and opencode the normal write_begin
call in foofs_write_begin, while adding a new foofs_prepare_chunk helper for
the directory code. The added benefit is that foofs_prepare_chunk has
a much saner calling convention.
Note that the interruptible flag passed into block_write_begin is always
ignored if we already pass in a page (see next patch for details), and
we never were doing truncations of exessive blocks for this case either so we
can switch directly to block_write_begin_newtrunc.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/sysv/itree.c')
| -rw-r--r-- | fs/sysv/itree.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/fs/sysv/itree.c b/fs/sysv/itree.c index f042eec464c2..4068f485cfd6 100644 --- a/fs/sysv/itree.c +++ b/fs/sysv/itree.c @@ -459,12 +459,10 @@ static int sysv_readpage(struct file *file, struct page *page) return block_read_full_page(page,get_block); } -int __sysv_write_begin(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) +int sysv_prepare_chunk(struct page *page, loff_t pos, unsigned len) { - return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, - get_block); + return block_write_begin_newtrunc(NULL, page->mapping, pos, len, 0, + &page, NULL, get_block); } static int sysv_write_begin(struct file *file, struct address_space *mapping, @@ -472,7 +470,8 @@ static int sysv_write_begin(struct file *file, struct address_space *mapping, struct page **pagep, void **fsdata) { *pagep = NULL; - return __sysv_write_begin(file, mapping, pos, len, flags, pagep, fsdata); + return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, + get_block); } static sector_t sysv_bmap(struct address_space *mapping, sector_t block) |