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hpfs: use mpage 

Use the mpage interface to improve performance.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mikulas Patocka 2013-07-04 18:44:27 +02:00 committed by Linus Torvalds
parent 3ebacb0504
commit a0c1b75963
1 changed files with 37 additions and 9 deletions
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46
fs/hpfs/file.c
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@ -7,6 +7,7 @@
*/
#include "hpfs_fn.h"
#include <linux/mpage.h>
#define BLOCKS(size) (((size) + 511) >> 9)
@ -34,7 +35,7 @@ int hpfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
* so we must ignore such errors.
*/
static secno hpfs_bmap(struct inode *inode, unsigned file_secno)
static secno hpfs_bmap(struct inode *inode, unsigned file_secno, unsigned *n_secs)
{
struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
unsigned n, disk_secno;
@ -42,11 +43,20 @@ static secno hpfs_bmap(struct inode *inode, unsigned file_secno)
struct buffer_head *bh;
if (BLOCKS(hpfs_i(inode)->mmu_private) <= file_secno) return 0;
n = file_secno - hpfs_inode->i_file_sec;
if (n < hpfs_inode->i_n_secs) return hpfs_inode->i_disk_sec + n;
if (n < hpfs_inode->i_n_secs) {
*n_secs = hpfs_inode->i_n_secs - n;
return hpfs_inode->i_disk_sec + n;
}
if (!(fnode = hpfs_map_fnode(inode->i_sb, inode->i_ino, &bh))) return 0;
disk_secno = hpfs_bplus_lookup(inode->i_sb, inode, &fnode->btree, file_secno, bh);
if (disk_secno == -1) return 0;
if (hpfs_chk_sectors(inode->i_sb, disk_secno, 1, "bmap")) return 0;
n = file_secno - hpfs_inode->i_file_sec;
if (n < hpfs_inode->i_n_secs) {
*n_secs = hpfs_inode->i_n_secs - n;
return hpfs_inode->i_disk_sec + n;
}
*n_secs = 1;
return disk_secno;
}
@ -67,10 +77,14 @@ static int hpfs_get_block(struct inode *inode, sector_t iblock, struct buffer_he
{
int r;
secno s;
unsigned n_secs;
hpfs_lock(inode->i_sb);
s = hpfs_bmap(inode, iblock);
s = hpfs_bmap(inode, iblock, &n_secs);
if (s) {
if (bh_result->b_size >> 9 < n_secs)
n_secs = bh_result->b_size >> 9;
map_bh(bh_result, inode->i_sb, s);
bh_result->b_size = n_secs << 9;
goto ret_0;
}
if (!create) goto ret_0;
@ -95,14 +109,26 @@ static int hpfs_get_block(struct inode *inode, sector_t iblock, struct buffer_he
return r;
}
static int hpfs_writepage(struct page *page, struct writeback_control *wbc)
{
return block_write_full_page(page,hpfs_get_block, wbc);
}
static int hpfs_readpage(struct file *file, struct page *page)
{
return block_read_full_page(page,hpfs_get_block);
return mpage_readpage(page, hpfs_get_block);
}
static int hpfs_writepage(struct page *page, struct writeback_control *wbc)
{
return block_write_full_page(page, hpfs_get_block, wbc);
}
static int hpfs_readpages(struct file *file, struct address_space *mapping,
struct list_head *pages, unsigned nr_pages)
{
return mpage_readpages(mapping, pages, nr_pages, hpfs_get_block);
}
static int hpfs_writepages(struct address_space *mapping,
struct writeback_control *wbc)
{
return mpage_writepages(mapping, wbc, hpfs_get_block);
}
static void hpfs_write_failed(struct address_space *mapping, loff_t to)
@ -161,6 +187,8 @@ static sector_t _hpfs_bmap(struct address_space *mapping, sector_t block)
const struct address_space_operations hpfs_aops = {
.readpage = hpfs_readpage,
.writepage = hpfs_writepage,
.readpages = hpfs_readpages,
.writepages = hpfs_writepages,
.write_begin = hpfs_write_begin,
.write_end = hpfs_write_end,
.bmap = _hpfs_bmap