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udf: convert to new aops 

Convert udf to new aops.  Also seem to have fixed pagecache corruption in
udf_adinicb_commit_write -- page was marked uptodate when it is not.  Also,
fixed the silly setup where prepare_write was doing a kmap to be used in
commit_write: just do kmap_atomic in write_end.  Use libfs helpers to make
this easier.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: <bfennema@falcon.csc.calpoly.edu>
Cc: Jan Kara <jack@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nick Piggin 2007-10-16 01:25:20 -07:00 committed by Linus Torvalds
parent 82b9d1d0da
commit be021ee41a
2 changed files with 22 additions and 26 deletions
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35
fs/udf/file.c
View File

@ -76,36 +76,29 @@ static int udf_adinicb_writepage(struct page *page, struct writeback_control *wb
return 0; return 0;
} }
static int udf_adinicb_prepare_write(struct file *file, struct page *page, static int udf_adinicb_write_end(struct file *file,
unsigned offset, unsigned to) struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata)
{ {
kmap(page); struct inode *inode = mapping->host;
return 0; unsigned offset = pos & (PAGE_CACHE_SIZE - 1);
} char *kaddr;
static int udf_adinicb_commit_write(struct file *file, struct page *page,
unsigned offset, unsigned to)
{
struct inode *inode = page->mapping->host;
char *kaddr = page_address(page);
kaddr = kmap_atomic(page, KM_USER0);
memcpy(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + offset, memcpy(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + offset,
kaddr + offset, to - offset); kaddr + offset, copied);
mark_inode_dirty(inode); kunmap_atomic(kaddr, KM_USER0);
SetPageUptodate(page);
kunmap(page); return simple_write_end(file, mapping, pos, len, copied, page, fsdata);
/* only one page here */
if (to > inode->i_size)
inode->i_size = to;
return 0;
} }
const struct address_space_operations udf_adinicb_aops = { const struct address_space_operations udf_adinicb_aops = {
.readpage = udf_adinicb_readpage, .readpage = udf_adinicb_readpage,
.writepage = udf_adinicb_writepage, .writepage = udf_adinicb_writepage,
.sync_page = block_sync_page, .sync_page = block_sync_page,
.prepare_write = udf_adinicb_prepare_write, .write_begin = simple_write_begin,
.commit_write = udf_adinicb_commit_write, .write_end = udf_adinicb_write_end,
}; };
static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov, static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,

13
fs/udf/inode.c
View File

@ -133,10 +133,13 @@ static int udf_readpage(struct file *file, struct page *page)
return block_read_full_page(page, udf_get_block); return block_read_full_page(page, udf_get_block);
} }
static int udf_prepare_write(struct file *file, struct page *page, static int udf_write_begin(struct file *file, struct address_space *mapping,
unsigned from, unsigned to) loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{ {
return block_prepare_write(page, from, to, udf_get_block); *pagep = NULL;
return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
udf_get_block);
} }
static sector_t udf_bmap(struct address_space *mapping, sector_t block) static sector_t udf_bmap(struct address_space *mapping, sector_t block)
@ -148,8 +151,8 @@ const struct address_space_operations udf_aops = {
.readpage = udf_readpage, .readpage = udf_readpage,
.writepage = udf_writepage, .writepage = udf_writepage,
.sync_page = block_sync_page, .sync_page = block_sync_page,
.prepare_write = udf_prepare_write, .write_begin = udf_write_begin,
.commit_write = generic_commit_write, .write_end = generic_write_end,
.bmap = udf_bmap, .bmap = udf_bmap,
}; };