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-rw-r--r--fs/hpfs/buffer.c33
-rw-r--r--fs/hpfs/file.c40
-rw-r--r--fs/hpfs/hpfs_fn.h7
-rw-r--r--fs/hpfs/map.c22
-rw-r--r--fs/hpfs/super.c17
5 files changed, 106 insertions, 13 deletions
diff --git a/fs/hpfs/buffer.c b/fs/hpfs/buffer.c
index f49d1498aa2e..4d0a1afa058c 100644
--- a/fs/hpfs/buffer.c
+++ b/fs/hpfs/buffer.c
@@ -7,8 +7,37 @@
*/
#include <linux/sched.h>
#include <linux/slab.h>
+#include <linux/blkdev.h>
#include "hpfs_fn.h"
+void hpfs_prefetch_sectors(struct super_block *s, unsigned secno, int n)
+{
+ struct buffer_head *bh;
+ struct blk_plug plug;
+
+ if (n <= 0 || unlikely(secno >= hpfs_sb(s)->sb_fs_size))
+ return;
+
+ bh = sb_find_get_block(s, secno);
+ if (bh) {
+ if (buffer_uptodate(bh)) {
+ brelse(bh);
+ return;
+ }
+ brelse(bh);
+ };
+
+ blk_start_plug(&plug);
+ while (n > 0) {
+ if (unlikely(secno >= hpfs_sb(s)->sb_fs_size))
+ break;
+ sb_breadahead(s, secno);
+ secno++;
+ n--;
+ }
+ blk_finish_plug(&plug);
+}
+
/* Map a sector into a buffer and return pointers to it and to the buffer. */
void *hpfs_map_sector(struct super_block *s, unsigned secno, struct buffer_head **bhp,
@@ -18,6 +47,8 @@ void *hpfs_map_sector(struct super_block *s, unsigned secno, struct buffer_head
hpfs_lock_assert(s);
+ hpfs_prefetch_sectors(s, secno, ahead);
+
cond_resched();
*bhp = bh = sb_bread(s, secno);
@@ -67,6 +98,8 @@ void *hpfs_map_4sectors(struct super_block *s, unsigned secno, struct quad_buffe
return NULL;
}
+ hpfs_prefetch_sectors(s, secno, 4 + ahead);
+
qbh->data = data = kmalloc(2048, GFP_NOFS);
if (!data) {
printk("HPFS: hpfs_map_4sectors: out of memory\n");
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
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index b7ae286646b5..1b398636e990 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -27,8 +27,9 @@
#define ALLOC_FWD_MAX 128
#define ALLOC_M 1
#define FNODE_RD_AHEAD 16
-#define ANODE_RD_AHEAD 16
-#define DNODE_RD_AHEAD 4
+#define ANODE_RD_AHEAD 0
+#define DNODE_RD_AHEAD 72
+#define COUNT_RD_AHEAD 62
#define FREE_DNODES_ADD 58
#define FREE_DNODES_DEL 29
@@ -207,6 +208,7 @@ void hpfs_remove_fnode(struct super_block *, fnode_secno fno);
/* buffer.c */
+void hpfs_prefetch_sectors(struct super_block *, unsigned, int);
void *hpfs_map_sector(struct super_block *, unsigned, struct buffer_head **, int);
void *hpfs_get_sector(struct super_block *, unsigned, struct buffer_head **);
void *hpfs_map_4sectors(struct super_block *, unsigned, struct quad_buffer_head *, int);
@@ -271,6 +273,7 @@ void hpfs_evict_inode(struct inode *);
__le32 *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *);
__le32 *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *);
+void hpfs_prefetch_bitmap(struct super_block *, unsigned);
unsigned char *hpfs_load_code_page(struct super_block *, secno);
__le32 *hpfs_load_bitmap_directory(struct super_block *, secno bmp);
struct fnode *hpfs_map_fnode(struct super_block *s, ino_t, struct buffer_head **);
diff --git a/fs/hpfs/map.c b/fs/hpfs/map.c
index 4acb19d78359..3aa66ae1031e 100644
--- a/fs/hpfs/map.c
+++ b/fs/hpfs/map.c
@@ -17,7 +17,9 @@ __le32 *hpfs_map_bitmap(struct super_block *s, unsigned bmp_block,
struct quad_buffer_head *qbh, char *id)
{
secno sec;
- if (hpfs_sb(s)->sb_chk) if (bmp_block * 16384 > hpfs_sb(s)->sb_fs_size) {
+ __le32 *ret;
+ unsigned n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
+ if (hpfs_sb(s)->sb_chk) if (bmp_block >= n_bands) {
hpfs_error(s, "hpfs_map_bitmap called with bad parameter: %08x at %s", bmp_block, id);
return NULL;
}
@@ -26,7 +28,23 @@ __le32 *hpfs_map_bitmap(struct super_block *s, unsigned bmp_block,
hpfs_error(s, "invalid bitmap block pointer %08x -> %08x at %s", bmp_block, sec, id);
return NULL;
}
- return hpfs_map_4sectors(s, sec, qbh, 4);
+ ret = hpfs_map_4sectors(s, sec, qbh, 4);
+ if (ret) hpfs_prefetch_bitmap(s, bmp_block + 1);
+ return ret;
+}
+
+void hpfs_prefetch_bitmap(struct super_block *s, unsigned bmp_block)
+{
+ unsigned to_prefetch, next_prefetch;
+ unsigned n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
+ if (unlikely(bmp_block >= n_bands))
+ return;
+ to_prefetch = le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[bmp_block]);
+ if (unlikely(bmp_block + 1 >= n_bands))
+ next_prefetch = 0;
+ else
+ next_prefetch = le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[bmp_block + 1]);
+ hpfs_prefetch_sectors(s, to_prefetch, 4 + 4 * (to_prefetch + 4 == next_prefetch));
}
/*
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index a0617e706957..4334cda8dba1 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -121,7 +121,7 @@ unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
unsigned long *bits;
unsigned count;
- bits = hpfs_map_4sectors(s, secno, &qbh, 4);
+ bits = hpfs_map_4sectors(s, secno, &qbh, 0);
if (!bits)
return 0;
count = bitmap_weight(bits, 2048 * BITS_PER_BYTE);
@@ -134,8 +134,13 @@ static unsigned count_bitmaps(struct super_block *s)
unsigned n, count, n_bands;
n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
count = 0;
- for (n = 0; n < n_bands; n++)
+ for (n = 0; n < COUNT_RD_AHEAD; n++) {
+ hpfs_prefetch_bitmap(s, n);
+ }
+ for (n = 0; n < n_bands; n++) {
+ hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD);
count += hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n]));
+ }
return count;
}
@@ -558,7 +563,13 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
sbi->sb_cp_table = NULL;
sbi->sb_c_bitmap = -1;
sbi->sb_max_fwd_alloc = 0xffffff;
-
+
+ if (sbi->sb_fs_size >= 0x80000000) {
+ hpfs_error(s, "invalid size in superblock: %08x",
+ (unsigned)sbi->sb_fs_size);
+ goto bail4;
+ }
+
/* Load bitmap directory */
if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps))))
goto bail4;
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-29 01:22:04 +0000