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Commit 4a66af9e authored by Nick Piggin's avatar Nick Piggin Committed by Linus Torvalds
Browse files

minixfs: convert to new aops 



Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
Cc: Andries Brouwer <Andries.Brouwer@cwi.nl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 26a6441a

fs/minix/dir.c

+31 −18
Original line number Diff line number Diff line
@@ -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);

	}

fs/minix/inode.c

+19 −4
Original line number Diff line number Diff line
@@ -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

};

fs/minix/minix.h

+3 −0
Original line number Diff line number Diff line
@@ -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 *);