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authorMikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>2013-07-04 20:44:27 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-04 22:22:46 +0400
commita0c1b7596323a2323d5f5c7d2404af7b58a1ef4e (patch)
tree4c4c0b72b12ff173401306e0626d91bd019f01bd /fs
parent3ebacb05044f82c5f0bb456a894eb9dc57d0ed90 (diff)
downloadlinux-a0c1b7596323a2323d5f5c7d2404af7b58a1ef4e.tar.xz
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/hpfs/file.c40
1 files changed, 34 insertions, 6 deletions
diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index e4ba5fe4c3b5..4e9dabcf1f4c 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -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_readpage(struct file *file, struct page *page)
+{
+ 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);
+ return block_write_full_page(page, hpfs_get_block, wbc);
}
-static int hpfs_readpage(struct file *file, struct page *page)
+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 block_read_full_page(page,hpfs_get_block);
+ 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