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minixfs: convert to new aops

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Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Andries Brouwer <Andries.Brouwer@cwi.nl>
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 26a6441aad
commit 4a66af9eaa
3 changed files with 53 additions and 22 deletions
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49
fs/minix/dir.c
View File

@ -9,8 +9,10 @@
*/
#include "minix.h"
#include <linux/buffer_head.h>
#include <linux/highmem.h>
#include <linux/smp_lock.h>
#include <linux/swap.h>
typedef struct minix_dir_entry minix_dirent;
typedef struct minix3_dir_entry minix3_dirent;
@ -48,11 +50,17 @@ 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
@ -220,7 +228,7 @@ int minix_add_link(struct dentry *dentry, struct inode *inode)
char *kaddr, *p;
minix_dirent *de;
minix3_dirent *de3;
unsigned from, to;
loff_t pos;
int err;
char *namx = NULL;
__u32 inumber;
@ -272,9 +280,9 @@ int minix_add_link(struct dentry *dentry, struct inode *inode)
return -EINVAL;
got_it:
from = p - (char*)page_address(page);
to = from + sbi->s_dirsize;
err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
pos = (page->index >> PAGE_CACHE_SHIFT) + p - (char*)page_address(page);
err = __minix_write_begin(NULL, page->mapping, pos, sbi->s_dirsize,
AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
if (err)
goto out_unlock;
memcpy (namx, name, namelen);
@ -285,7 +293,7 @@ got_it:
memset (namx + namelen, 0, sbi->s_dirsize - namelen - 2);
de->inode = inode->i_ino;
}
err = dir_commit_chunk(page, from, to);
err = dir_commit_chunk(page, pos, sbi->s_dirsize);
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);
out_put:
@ -302,15 +310,16 @@ int minix_delete_entry(struct minix_dir_entry *de, struct page *page)
struct address_space *mapping = page->mapping;
struct inode *inode = (struct inode*)mapping->host;
char *kaddr = page_address(page);
unsigned from = (char*)de - kaddr;
unsigned to = from + minix_sb(inode->i_sb)->s_dirsize;
loff_t pos = page_offset(page) + (char*)de - kaddr;
unsigned len = minix_sb(inode->i_sb)->s_dirsize;
int err;
lock_page(page);
err = mapping->a_ops->prepare_write(NULL, page, from, to);
err = __minix_write_begin(NULL, mapping, pos, len,
AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
if (err == 0) {
de->inode = 0;
err = dir_commit_chunk(page, from, to);
err = dir_commit_chunk(page, pos, len);
} else {
unlock_page(page);
}
@ -330,7 +339,8 @@ int minix_make_empty(struct inode *inode, struct inode *dir)
if (!page)
return -ENOMEM;
err = mapping->a_ops->prepare_write(NULL, page, 0, 2 * sbi->s_dirsize);
err = __minix_write_begin(NULL, mapping, 0, 2 * sbi->s_dirsize,
AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
if (err) {
unlock_page(page);
goto fail;
@ -421,17 +431,20 @@ not_empty:
void minix_set_link(struct minix_dir_entry *de, struct page *page,
struct inode *inode)
{
struct inode *dir = (struct inode*)page->mapping->host;
struct address_space *mapping = page->mapping;
struct inode *dir = mapping->host;
struct minix_sb_info *sbi = minix_sb(dir->i_sb);
unsigned from = (char *)de-(char*)page_address(page);
unsigned to = from + sbi->s_dirsize;
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 = __minix_write_begin(NULL, mapping, pos, sbi->s_dirsize,
AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
if (err == 0) {
de->inode = inode->i_ino;
err = dir_commit_chunk(page, from, to);
err = dir_commit_chunk(page, pos, sbi->s_dirsize);
} else {
unlock_page(page);
}

23
fs/minix/inode.c
View File

@ -346,24 +346,39 @@ static int minix_writepage(struct page *page, struct writeback_control *wbc)
{
return block_write_full_page(page, minix_get_block, wbc);
}
static int minix_readpage(struct file *file, struct page *page)
{
return block_read_full_page(page,minix_get_block);
}
static int minix_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
int __minix_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,minix_get_block);
return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
minix_get_block);
}
static int minix_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
*pagep = NULL;
return __minix_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
}
static sector_t minix_bmap(struct address_space *mapping, sector_t block)
{
return generic_block_bmap(mapping,block,minix_get_block);
}
static const struct address_space_operations minix_aops = {
.readpage = minix_readpage,
.writepage = minix_writepage,
.sync_page = block_sync_page,
.prepare_write = minix_prepare_write,
.commit_write = generic_commit_write,
.write_begin = minix_write_begin,
.write_end = generic_write_end,
.bmap = minix_bmap
};

3
fs/minix/minix.h
View File

@ -54,6 +54,9 @@ extern int minix_new_block(struct inode * inode);
extern void minix_free_block(struct inode *inode, unsigned long block);
extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi);
extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
extern int __minix_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata);
extern void V1_minix_truncate(struct inode *);
extern void V2_minix_truncate(struct inode *);