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Code

sysv: convert to new aops

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Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Christoph Hellwig <hch@lst.de>
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 01:25:21 -07:00 committed by Linus Torvalds
parent be021ee41a
commit 26a6441aad
3 changed files with 52 additions and 24 deletions
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50
fs/sysv/dir.c
View File

@ -16,6 +16,7 @@
#include <linux/pagemap.h>
#include <linux/highmem.h>
#include <linux/smp_lock.h>
#include <linux/swap.h>
#include "sysv.h"
static int sysv_readdir(struct file *, void *, filldir_t);
@ -37,12 +38,17 @@ static inline unsigned long dir_pages(struct inode *inode)
return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
}
static int dir_commit_chunk(struct page *page, unsigned from, unsigned to)
static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)
{
struct inode *dir = (struct inode *)page->mapping->host;
struct address_space *mapping = page->mapping;
struct inode *dir = mapping->host;
int err = 0;
page->mapping->a_ops->commit_write(NULL, page, from, to);
block_write_end(NULL, mapping, pos, len, len, page, NULL);
if (pos+len > dir->i_size) {
i_size_write(dir, pos+len);
mark_inode_dirty(dir);
}
if (IS_DIRSYNC(dir))
err = write_one_page(page, 1);
else
@ -186,7 +192,7 @@ int sysv_add_link(struct dentry *dentry, struct inode *inode)
unsigned long npages = dir_pages(dir);
unsigned long n;
char *kaddr;
unsigned from, to;
loff_t pos;
int err;
/* We take care of directory expansion in the same loop */
@ -212,16 +218,17 @@ int sysv_add_link(struct dentry *dentry, struct inode *inode)
return -EINVAL;
got_it:
from = (char*)de - (char*)page_address(page);
to = from + SYSV_DIRSIZE;
pos = page_offset(page) +
(char*)de - (char*)page_address(page);
lock_page(page);
err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
err = __sysv_write_begin(NULL, page->mapping, pos, SYSV_DIRSIZE,
AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
if (err)
goto out_unlock;
memcpy (de->name, name, namelen);
memset (de->name + namelen, 0, SYSV_DIRSIZE - namelen - 2);
de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), inode->i_ino);
err = dir_commit_chunk(page, from, to);
err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);
out_page:
@ -238,15 +245,15 @@ int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)
struct address_space *mapping = page->mapping;
struct inode *inode = (struct inode*)mapping->host;
char *kaddr = (char*)page_address(page);
unsigned from = (char*)de - kaddr;
unsigned to = from + SYSV_DIRSIZE;
loff_t pos = page_offset(page) + (char *)de - kaddr;
int err;
lock_page(page);
err = mapping->a_ops->prepare_write(NULL, page, from, to);
err = __sysv_write_begin(NULL, mapping, pos, SYSV_DIRSIZE,
AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
BUG_ON(err);
de->inode = 0;
err = dir_commit_chunk(page, from, to);
err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);
dir_put_page(page);
inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
@ -263,12 +270,13 @@ int sysv_make_empty(struct inode *inode, struct inode *dir)
if (!page)
return -ENOMEM;
kmap(page);
err = mapping->a_ops->prepare_write(NULL, page, 0, 2 * SYSV_DIRSIZE);
err = __sysv_write_begin(NULL, mapping, 0, 2 * SYSV_DIRSIZE,
AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
if (err) {
unlock_page(page);
goto fail;
}
kmap(page);
base = (char*)page_address(page);
memset(base, 0, PAGE_CACHE_SIZE);
@ -280,9 +288,9 @@ int sysv_make_empty(struct inode *inode, struct inode *dir)
de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), dir->i_ino);
strcpy(de->name,"..");
kunmap(page);
err = dir_commit_chunk(page, 0, 2 * SYSV_DIRSIZE);
fail:
kunmap(page);
page_cache_release(page);
return err;
}
@ -336,16 +344,18 @@ not_empty:
void sysv_set_link(struct sysv_dir_entry *de, struct page *page,
struct inode *inode)
{
struct inode *dir = (struct inode*)page->mapping->host;
unsigned from = (char *)de-(char*)page_address(page);
unsigned to = from + SYSV_DIRSIZE;
struct address_space *mapping = page->mapping;
struct inode *dir = mapping->host;
loff_t pos = page_offset(page) +
(char *)de-(char*)page_address(page);
int err;
lock_page(page);
err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
err = __sysv_write_begin(NULL, mapping, pos, SYSV_DIRSIZE,
AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
BUG_ON(err);
de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), inode->i_ino);
err = dir_commit_chunk(page, from, to);
err = dir_commit_chunk(page, pos, SYSV_DIRSIZE);
dir_put_page(page);
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);

23
fs/sysv/itree.c
View File

@ -453,23 +453,38 @@ static int sysv_writepage(struct page *page, struct writeback_control *wbc)
{
return block_write_full_page(page,get_block,wbc);
}
static int sysv_readpage(struct file *file, struct page *page)
{
return block_read_full_page(page,get_block);
}
static int sysv_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
int __sysv_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
return block_prepare_write(page,from,to,get_block);
return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
get_block);
}
static int sysv_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
*pagep = NULL;
return __sysv_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
}
static sector_t sysv_bmap(struct address_space *mapping, sector_t block)
{
return generic_block_bmap(mapping,block,get_block);
}
const struct address_space_operations sysv_aops = {
.readpage = sysv_readpage,
.writepage = sysv_writepage,
.sync_page = block_sync_page,
.prepare_write = sysv_prepare_write,
.commit_write = generic_commit_write,
.write_begin = sysv_write_begin,
.write_end = generic_write_end,
.bmap = sysv_bmap
};

3
fs/sysv/sysv.h
View File

@ -136,6 +136,9 @@ extern unsigned long sysv_count_free_blocks(struct super_block *);
/* itree.c */
extern void sysv_truncate(struct inode *);
extern int __sysv_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata);
/* inode.c */
extern int sysv_write_inode(struct inode *, int);