On Wed, 2006-02-15 at 13:29 -0800, Mingming Cao wrote:
> On Tue, 2006-02-14 at 16:02 -0800, Badari Pulavarty wrote:
> > Hi,
> >
> > Following patches add support to map multiple blocks in ->get_block().
> > This is will allow us to handle mapping of multiple disk blocks for
> > mpage_readpages() and mpage_writepages() etc. Instead of adding new
> > argument, I use "b_size" to indicate the amount of disk mapping needed
> > for get_block().
> >
> > Now that get_block() can handle multiple blocks, there is no need
> > for ->get_blocks() which was added for DIO. Second patch removes
> > them.
> >
> > [PATCH 1/2] map multiple blocks in get_block() for mpage_readpages()
> >
> > [PATCH 2/2] remove ->get_blocks() support
> >
> >
> > Andrew, Please let me know if you want to pick these up into -mm
> > tree, since they need to be integrated with Mingming's ext3 multiblock
> > support.
> >
>
> Hi Badari,
>
> Patch looks good. Did you get a chance to combine your patches with the
> ext3 multiple blocks map/allocation patches, and run some simple
> buffered-IO read tests? It would be nice to see if there is any
> performance or cpu-usage gain (or regression).
Here are the patches against -mm tree, with your ext3 mblock work.
Can you give it a test and see how they do ?
Thanks,
Badari
This patch changes mpage_readpages() and get_block() to
get the disk mapping information for multiple blocks at the
same time.
Instead of adding new get_blocks() and pass it around every
where, I overload b_size of bufferhead to pass in how much
disk mapping we are requesting. Only the filesystems who
care to use this information and provide multiple disk
blocks at a time can choose to do so.
No changes are needed for the filesystems who wants to ignore this.
Signed-off-by: Badari Pulavarty <[email protected]>
fs/buffer.c | 6 ++
fs/jfs/inode.c | 3 -
fs/mpage.c | 91 +++++++++++++++++++++++++++++++++++---------
fs/xfs/linux-2.6/xfs_aops.c | 4 -
4 files changed, 84 insertions(+), 20 deletions(-)
Index: linux-2.6.16-rc3-mm1/fs/mpage.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/mpage.c 2006-02-12 16:27:25.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/mpage.c 2006-02-15 14:26:14.000000000 -0800
@@ -165,7 +165,9 @@ map_buffer_to_page(struct page *page, st
static struct bio *
do_mpage_readpage(struct bio *bio, struct page *page, unsigned nr_pages,
- sector_t *last_block_in_bio, get_block_t get_block)
+ sector_t *last_block_in_bio, struct buffer_head *map_bh,
+ unsigned long *first_logical_block, int *map_valid,
+ get_block_t get_block)
{
struct inode *inode = page->mapping->host;
const unsigned blkbits = inode->i_blkbits;
@@ -177,29 +179,64 @@ do_mpage_readpage(struct bio *bio, struc
unsigned page_block;
unsigned first_hole = blocks_per_page;
struct block_device *bdev = NULL;
- struct buffer_head bh;
int length;
int fully_mapped = 1;
+ unsigned nblocks, i;
if (page_has_buffers(page))
goto confused;
block_in_file = (sector_t)page->index << (PAGE_CACHE_SHIFT - blkbits);
last_block = (i_size_read(inode) + blocksize - 1) >> blkbits;
+ page_block = 0;
+
+ /*
+ * Map blocks using the result from the last get_blocks call first.
+ */
+ nblocks = map_bh->b_size >> blkbits;
+ if (*map_valid &&
+ block_in_file > *first_logical_block &&
+ block_in_file < (*first_logical_block + nblocks)) {
+ unsigned map_offset = block_in_file - *first_logical_block;
+ unsigned last = nblocks - map_offset;
+
+ for (i = 0; ; i++) {
+ if (i == last) {
+ *map_valid = 0;
+ break;
+ }
+ if (page_block == blocks_per_page)
+ break;
+ blocks[page_block] = map_bh->b_blocknr + map_offset + i;
+ page_block++;
+ block_in_file++;
+ }
+ bdev = map_bh->b_bdev;
+ }
+
+ /*
+ * Then do more get_blocks calls until we are done with this page.
+ */
+ map_bh->b_page = page;
+ while (page_block < blocks_per_page) {
+ map_bh->b_state = 0;
+ map_bh->b_size = 0;
- bh.b_page = page;
- for (page_block = 0; page_block < blocks_per_page;
- page_block++, block_in_file++) {
- bh.b_state = 0;
if (block_in_file < last_block) {
- if (get_block(inode, block_in_file, &bh, 0))
+ map_bh->b_size = (last_block - block_in_file) << blkbits;
+ if (get_block(inode, block_in_file, map_bh, 0))
goto confused;
+ *first_logical_block = block_in_file;
+ *map_valid = 1;
}
- if (!buffer_mapped(&bh)) {
+ if (!buffer_mapped(map_bh)) {
fully_mapped = 0;
if (first_hole == blocks_per_page)
first_hole = page_block;
+ page_block++;
+ block_in_file++;
+ *map_valid = 0;
continue;
}
@@ -209,8 +246,8 @@ do_mpage_readpage(struct bio *bio, struc
* we just collected from get_block into the page's buffers
* so readpage doesn't have to repeat the get_block call
*/
- if (buffer_uptodate(&bh)) {
- map_buffer_to_page(page, &bh, page_block);
+ if (buffer_uptodate(map_bh)) {
+ map_buffer_to_page(page, map_bh, page_block);
goto confused;
}
@@ -218,10 +255,20 @@ do_mpage_readpage(struct bio *bio, struc
goto confused; /* hole -> non-hole */
/* Contiguous blocks? */
- if (page_block && blocks[page_block-1] != bh.b_blocknr-1)
+ if (page_block && blocks[page_block-1] != map_bh->b_blocknr-1)
goto confused;
- blocks[page_block] = bh.b_blocknr;
- bdev = bh.b_bdev;
+ nblocks = map_bh->b_size >> blkbits;
+ for (i = 0; ; i++) {
+ if (i == nblocks) {
+ *map_valid = 0;
+ break;
+ } else if (page_block == blocks_per_page)
+ break;
+ blocks[page_block] = map_bh->b_blocknr + i;
+ page_block++;
+ block_in_file++;
+ }
+ bdev = map_bh->b_bdev;
}
if (first_hole != blocks_per_page) {
@@ -260,7 +307,7 @@ alloc_new:
goto alloc_new;
}
- if (buffer_boundary(&bh) || (first_hole != blocks_per_page))
+ if (buffer_boundary(map_bh) || (first_hole != blocks_per_page))
bio = mpage_bio_submit(READ, bio);
else
*last_block_in_bio = blocks[blocks_per_page - 1];
@@ -331,6 +378,9 @@ mpage_readpages(struct address_space *ma
unsigned page_idx;
sector_t last_block_in_bio = 0;
struct pagevec lru_pvec;
+ struct buffer_head map_bh;
+ unsigned long first_logical_block = 0;
+ int map_valid = 0;
pagevec_init(&lru_pvec, 0);
for (page_idx = 0; page_idx < nr_pages; page_idx++) {
@@ -342,7 +392,9 @@ mpage_readpages(struct address_space *ma
page->index, GFP_KERNEL)) {
bio = do_mpage_readpage(bio, page,
nr_pages - page_idx,
- &last_block_in_bio, get_block);
+ &last_block_in_bio, &map_bh,
+ &first_logical_block,
+ &map_valid, get_block);
if (!pagevec_add(&lru_pvec, page))
__pagevec_lru_add(&lru_pvec);
} else {
@@ -364,9 +416,14 @@ int mpage_readpage(struct page *page, ge
{
struct bio *bio = NULL;
sector_t last_block_in_bio = 0;
+ struct buffer_head map_bh;
+ unsigned long first_logical_block = 0;
+ int map_valid = 0;
+
- bio = do_mpage_readpage(bio, page, 1,
- &last_block_in_bio, get_block);
+ bio = do_mpage_readpage(bio, page, 1, &last_block_in_bio,
+ &map_bh, &first_logical_block, &map_valid,
+ get_block);
if (bio)
mpage_bio_submit(READ, bio);
return 0;
@@ -472,6 +529,7 @@ __mpage_writepage(struct bio *bio, struc
for (page_block = 0; page_block < blocks_per_page; ) {
map_bh.b_state = 0;
+ map_bh.b_size = 1 << blkbits;
if (get_block(inode, block_in_file, &map_bh, 1))
goto confused;
if (buffer_new(&map_bh))
Index: linux-2.6.16-rc3-mm1/fs/buffer.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/buffer.c 2006-02-15 14:24:52.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/buffer.c 2006-02-15 14:26:14.000000000 -0800
@@ -1788,6 +1788,7 @@ static int __block_write_full_page(struc
clear_buffer_dirty(bh);
set_buffer_uptodate(bh);
} else if (!buffer_mapped(bh) && buffer_dirty(bh)) {
+ bh->b_size = 1 << inode->i_blkbits;
err = get_block(inode, block, bh, 1);
if (err)
goto recover;
@@ -1941,6 +1942,7 @@ static int __block_prepare_write(struct
if (buffer_new(bh))
clear_buffer_new(bh);
if (!buffer_mapped(bh)) {
+ bh->b_size = 1 << inode->i_blkbits;
err = get_block(inode, block, bh, 1);
if (err)
break;
@@ -2096,6 +2098,7 @@ int block_read_full_page(struct page *pa
fully_mapped = 0;
if (iblock < lblock) {
+ bh->b_size = 1 << inode->i_blkbits;
err = get_block(inode, iblock, bh, 0);
if (err)
SetPageError(page);
@@ -2417,6 +2420,7 @@ int nobh_prepare_write(struct page *page
create = 1;
if (block_start >= to)
create = 0;
+ map_bh.b_size = 1 << blkbits;
ret = get_block(inode, block_in_file + block_in_page,
&map_bh, create);
if (ret)
@@ -2677,6 +2681,7 @@ int block_truncate_page(struct address_s
err = 0;
if (!buffer_mapped(bh)) {
+ bh->b_size = 1 << inode->i_blkbits;
err = get_block(inode, iblock, bh, 0);
if (err)
goto unlock;
@@ -2763,6 +2768,7 @@ sector_t generic_block_bmap(struct addre
struct inode *inode = mapping->host;
tmp.b_state = 0;
tmp.b_blocknr = 0;
+ tmp.b_size = 1 << inode->i_blkbits;
get_block(inode, block, &tmp, 0);
return tmp.b_blocknr;
}
Index: linux-2.6.16-rc3-mm1/fs/jfs/inode.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/jfs/inode.c 2006-02-12 16:27:25.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/jfs/inode.c 2006-02-15 14:26:14.000000000 -0800
@@ -257,7 +257,8 @@ jfs_get_blocks(struct inode *ip, sector_
static int jfs_get_block(struct inode *ip, sector_t lblock,
struct buffer_head *bh_result, int create)
{
- return jfs_get_blocks(ip, lblock, 1, bh_result, create);
+ return jfs_get_blocks(ip, lblock, bh_result->b_size >> ip->i_blkbits,
+ bh_result, create);
}
static int jfs_writepage(struct page *page, struct writeback_control *wbc)
Index: linux-2.6.16-rc3-mm1/fs/xfs/linux-2.6/xfs_aops.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/xfs/linux-2.6/xfs_aops.c 2006-02-12 16:27:25.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/xfs/linux-2.6/xfs_aops.c 2006-02-15 14:26:14.000000000 -0800
@@ -1136,8 +1136,8 @@ linvfs_get_block(
struct buffer_head *bh_result,
int create)
{
- return __linvfs_get_block(inode, iblock, 0, bh_result,
- create, 0, BMAPI_WRITE);
+ return __linvfs_get_block(inode, iblock, bh_result->b_size >> inode->i_blkbits,
+ bh_result, create, 0, BMAPI_WRITE);
}
STATIC int
Now that get_block() can handle mapping multiple disk blocks,
no need to have ->get_blocks(). This patch removes fs specific
->get_blocks() added for DIO and makes it users use get_block()
instead.
Signed-off-by: Badari Pulavarty <[email protected]>
fs/block_dev.c | 3 ++-
fs/direct-io.c | 27 ++++++++++++++-------------
fs/ext2/inode.c | 14 +-------------
fs/ext3/inode.c | 3 +--
fs/fat/inode.c | 2 +-
fs/hfs/inode.c | 13 +------------
fs/hfsplus/inode.c | 13 +------------
fs/jfs/inode.c | 2 +-
fs/ocfs2/aops.c | 2 +-
fs/reiserfs/inode.c | 1 -
fs/xfs/linux-2.6/xfs_aops.c | 5 ++---
include/linux/fs.h | 17 +++++++----------
12 files changed, 32 insertions(+), 70 deletions(-)
Index: linux-2.6.16-rc3-mm1/fs/direct-io.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/direct-io.c 2006-02-12 16:27:25.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/direct-io.c 2006-02-15 14:28:06.000000000 -0800
@@ -86,12 +86,12 @@ struct dio {
unsigned first_block_in_page; /* doesn't change, Used only once */
int boundary; /* prev block is at a boundary */
int reap_counter; /* rate limit reaping */
- get_blocks_t *get_blocks; /* block mapping function */
+ get_block_t *get_block; /* block mapping function */
dio_iodone_t *end_io; /* IO completion function */
sector_t final_block_in_bio; /* current final block in bio + 1 */
sector_t next_block_for_io; /* next block to be put under IO,
in dio_blocks units */
- struct buffer_head map_bh; /* last get_blocks() result */
+ struct buffer_head map_bh; /* last get_block() result */
/*
* Deferred addition of a page to the dio. These variables are
@@ -210,9 +210,9 @@ static struct page *dio_get_page(struct
/*
* Called when all DIO BIO I/O has been completed - let the filesystem
- * know, if it registered an interest earlier via get_blocks. Pass the
+ * know, if it registered an interest earlier via get_block. Pass the
* private field of the map buffer_head so that filesystems can use it
- * to hold additional state between get_blocks calls and dio_complete.
+ * to hold additional state between get_block calls and dio_complete.
*/
static void dio_complete(struct dio *dio, loff_t offset, ssize_t bytes)
{
@@ -488,7 +488,7 @@ static int dio_bio_reap(struct dio *dio)
* The fs is allowed to map lots of blocks at once. If it wants to do that,
* it uses the passed inode-relative block number as the file offset, as usual.
*
- * get_blocks() is passed the number of i_blkbits-sized blocks which direct_io
+ * get_block() is passed the number of i_blkbits-sized blocks which direct_io
* has remaining to do. The fs should not map more than this number of blocks.
*
* If the fs has mapped a lot of blocks, it should populate bh->b_size to
@@ -501,7 +501,7 @@ static int dio_bio_reap(struct dio *dio)
* In the case of filesystem holes: the fs may return an arbitrarily-large
* hole by returning an appropriate value in b_size and by clearing
* buffer_mapped(). However the direct-io code will only process holes one
- * block at a time - it will repeatedly call get_blocks() as it walks the hole.
+ * block at a time - it will repeatedly call get_block() as it walks the hole.
*/
static int get_more_blocks(struct dio *dio)
{
@@ -543,7 +543,8 @@ static int get_more_blocks(struct dio *d
* at a higher level for inside-i_size block-instantiating
* writes.
*/
- ret = (*dio->get_blocks)(dio->inode, fs_startblk, fs_count,
+ map_bh->b_size = fs_count << dio->blkbits;
+ ret = (*dio->get_block)(dio->inode, fs_startblk,
map_bh, create);
}
return ret;
@@ -778,11 +779,11 @@ static void dio_zero_block(struct dio *d
* happily perform page-sized but 512-byte aligned IOs. It is important that
* blockdev IO be able to have fine alignment and large sizes.
*
- * So what we do is to permit the ->get_blocks function to populate bh.b_size
+ * So what we do is to permit the ->get_block function to populate bh.b_size
* with the size of IO which is permitted at this offset and this i_blkbits.
*
* For best results, the blockdev should be set up with 512-byte i_blkbits and
- * it should set b_size to PAGE_SIZE or more inside get_blocks(). This gives
+ * it should set b_size to PAGE_SIZE or more inside get_block(). This gives
* fine alignment but still allows this function to work in PAGE_SIZE units.
*/
static int do_direct_IO(struct dio *dio)
@@ -942,7 +943,7 @@ out:
static ssize_t
direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
const struct iovec *iov, loff_t offset, unsigned long nr_segs,
- unsigned blkbits, get_blocks_t get_blocks, dio_iodone_t end_io,
+ unsigned blkbits, get_block_t get_block, dio_iodone_t end_io,
struct dio *dio)
{
unsigned long user_addr;
@@ -964,7 +965,7 @@ direct_io_worker(int rw, struct kiocb *i
dio->boundary = 0;
dio->reap_counter = 0;
- dio->get_blocks = get_blocks;
+ dio->get_block = get_block;
dio->end_io = end_io;
dio->map_bh.b_private = NULL;
dio->final_block_in_bio = -1;
@@ -1170,7 +1171,7 @@ direct_io_worker(int rw, struct kiocb *i
ssize_t
__blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
struct block_device *bdev, const struct iovec *iov, loff_t offset,
- unsigned long nr_segs, get_blocks_t get_blocks, dio_iodone_t end_io,
+ unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
int dio_lock_type)
{
int seg;
@@ -1266,7 +1267,7 @@ __blockdev_direct_IO(int rw, struct kioc
(end > i_size_read(inode)));
retval = direct_io_worker(rw, iocb, inode, iov, offset,
- nr_segs, blkbits, get_blocks, end_io, dio);
+ nr_segs, blkbits, get_block, end_io, dio);
if (rw == READ && dio_lock_type == DIO_LOCKING)
reader_with_isem = 0;
Index: linux-2.6.16-rc3-mm1/fs/ext2/inode.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/ext2/inode.c 2006-02-12 16:27:25.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/ext2/inode.c 2006-02-15 14:28:06.000000000 -0800
@@ -667,18 +667,6 @@ static sector_t ext2_bmap(struct address
return generic_block_bmap(mapping,block,ext2_get_block);
}
-static int
-ext2_get_blocks(struct inode *inode, sector_t iblock, unsigned long max_blocks,
- struct buffer_head *bh_result, int create)
-{
- int ret;
-
- ret = ext2_get_block(inode, iblock, bh_result, create);
- if (ret == 0)
- bh_result->b_size = (1 << inode->i_blkbits);
- return ret;
-}
-
static ssize_t
ext2_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
loff_t offset, unsigned long nr_segs)
@@ -687,7 +675,7 @@ ext2_direct_IO(int rw, struct kiocb *ioc
struct inode *inode = file->f_mapping->host;
return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, ext2_get_blocks, NULL);
+ offset, nr_segs, ext2_get_block, NULL);
}
static int
Index: linux-2.6.16-rc3-mm1/fs/ext3/inode.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/ext3/inode.c 2006-02-15 14:24:52.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/ext3/inode.c 2006-02-15 14:35:15.000000000 -0800
@@ -936,13 +936,12 @@ out:
#define DIO_CREDITS (EXT3_RESERVE_TRANS_BLOCKS + 32)
-static int
-ext3_direct_io_get_blocks(struct inode *inode, sector_t iblock,
- unsigned long max_blocks,
- struct buffer_head *bh_result, int create)
+static int ext3_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
{
handle_t *handle = journal_current_handle();
int ret = 0;
+ unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;
if (!handle)
goto get_block; /* A read */
@@ -987,20 +986,6 @@ get_block:
return ret;
}
-static int ext3_get_blocks(struct inode *inode, sector_t iblock,
- unsigned long maxblocks, struct buffer_head *bh_result,
- int create)
-{
- return ext3_direct_io_get_blocks(inode, iblock, maxblocks,
- bh_result, create);
-}
-
-static int ext3_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int create)
-{
- return ext3_get_blocks(inode, iblock, 1, bh_result, create);
-}
-
/*
* `handle' can be NULL if create is zero
*/
@@ -1653,7 +1638,7 @@ static ssize_t ext3_direct_IO(int rw, st
ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
offset, nr_segs,
- ext3_direct_io_get_blocks, NULL);
+ ext3_get_block, NULL);
/*
* Reacquire the handle: ext3_direct_io_get_block() can restart the
Index: linux-2.6.16-rc3-mm1/fs/fat/inode.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/fat/inode.c 2006-02-12 16:27:25.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/fat/inode.c 2006-02-15 14:28:06.000000000 -0800
@@ -101,11 +101,11 @@ static int __fat_get_blocks(struct inode
}
static int fat_get_blocks(struct inode *inode, sector_t iblock,
- unsigned long max_blocks,
struct buffer_head *bh_result, int create)
{
struct super_block *sb = inode->i_sb;
int err;
+ unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;
err = __fat_get_blocks(inode, iblock, &max_blocks, bh_result, create);
if (err)
Index: linux-2.6.16-rc3-mm1/fs/hfs/inode.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/hfs/inode.c 2006-02-15 14:24:52.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/hfs/inode.c 2006-02-15 14:28:06.000000000 -0800
@@ -98,17 +98,6 @@ static int hfs_releasepage(struct page *
return res ? try_to_free_buffers(page) : 0;
}
-static int hfs_get_blocks(struct inode *inode, sector_t iblock, unsigned long max_blocks,
- struct buffer_head *bh_result, int create)
-{
- int ret;
-
- ret = hfs_get_block(inode, iblock, bh_result, create);
- if (!ret)
- bh_result->b_size = (1 << inode->i_blkbits);
- return ret;
-}
-
static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset, unsigned long nr_segs)
{
@@ -116,7 +105,7 @@ static ssize_t hfs_direct_IO(int rw, str
struct inode *inode = file->f_dentry->d_inode->i_mapping->host;
return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, hfs_get_blocks, NULL);
+ offset, nr_segs, hfs_get_block, NULL);
}
static int hfs_writepages(struct address_space *mapping,
Index: linux-2.6.16-rc3-mm1/fs/hfsplus/inode.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/hfsplus/inode.c 2006-02-15 14:24:52.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/hfsplus/inode.c 2006-02-15 14:28:06.000000000 -0800
@@ -93,17 +93,6 @@ static int hfsplus_releasepage(struct pa
return res ? try_to_free_buffers(page) : 0;
}
-static int hfsplus_get_blocks(struct inode *inode, sector_t iblock, unsigned long max_blocks,
- struct buffer_head *bh_result, int create)
-{
- int ret;
-
- ret = hfsplus_get_block(inode, iblock, bh_result, create);
- if (!ret)
- bh_result->b_size = (1 << inode->i_blkbits);
- return ret;
-}
-
static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t offset, unsigned long nr_segs)
{
@@ -111,7 +100,7 @@ static ssize_t hfsplus_direct_IO(int rw,
struct inode *inode = file->f_dentry->d_inode->i_mapping->host;
return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, hfsplus_get_blocks, NULL);
+ offset, nr_segs, hfsplus_get_block, NULL);
}
static int hfsplus_writepages(struct address_space *mapping,
Index: linux-2.6.16-rc3-mm1/fs/ocfs2/aops.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/ocfs2/aops.c 2006-02-12 16:27:25.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/ocfs2/aops.c 2006-02-15 14:28:06.000000000 -0800
@@ -538,7 +538,6 @@ bail:
* fs_count, map_bh, dio->rw == WRITE);
*/
static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
- unsigned long max_blocks,
struct buffer_head *bh_result, int create)
{
int ret;
@@ -546,6 +545,7 @@ static int ocfs2_direct_IO_get_blocks(st
u64 p_blkno;
int contig_blocks;
unsigned char blocksize_bits;
+ unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;
if (!inode || !bh_result) {
mlog(ML_ERROR, "inode or bh_result is null\n");
Index: linux-2.6.16-rc3-mm1/fs/reiserfs/inode.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/reiserfs/inode.c 2006-02-12 16:27:25.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/reiserfs/inode.c 2006-02-15 14:28:06.000000000 -0800
@@ -466,7 +466,6 @@ static int reiserfs_get_block_create_0(s
direct_IO request. */
static int reiserfs_get_blocks_direct_io(struct inode *inode,
sector_t iblock,
- unsigned long max_blocks,
struct buffer_head *bh_result,
int create)
{
Index: linux-2.6.16-rc3-mm1/fs/xfs/linux-2.6/xfs_aops.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/xfs/linux-2.6/xfs_aops.c 2006-02-15 14:26:14.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/xfs/linux-2.6/xfs_aops.c 2006-02-15 14:28:06.000000000 -0800
@@ -1144,12 +1144,11 @@ STATIC int
linvfs_get_blocks_direct(
struct inode *inode,
sector_t iblock,
- unsigned long max_blocks,
struct buffer_head *bh_result,
int create)
{
- return __linvfs_get_block(inode, iblock, max_blocks, bh_result,
- create, 1, BMAPI_WRITE|BMAPI_DIRECT);
+ return __linvfs_get_block(inode, iblock, bh_result->b_size >> inode->i_blkbits,
+ bh_result, create, 1, BMAPI_WRITE|BMAPI_DIRECT);
}
STATIC void
Index: linux-2.6.16-rc3-mm1/include/linux/fs.h
===================================================================
--- linux-2.6.16-rc3-mm1.orig/include/linux/fs.h 2006-02-15 14:24:52.000000000 -0800
+++ linux-2.6.16-rc3-mm1/include/linux/fs.h 2006-02-15 14:28:06.000000000 -0800
@@ -244,9 +244,6 @@ extern void __init files_init(unsigned l
struct buffer_head;
typedef int (get_block_t)(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create);
-typedef int (get_blocks_t)(struct inode *inode, sector_t iblock,
- unsigned long max_blocks,
- struct buffer_head *bh_result, int create);
typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
ssize_t bytes, void *private);
@@ -1646,7 +1643,7 @@ static inline void do_generic_file_read(
ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
struct block_device *bdev, const struct iovec *iov, loff_t offset,
- unsigned long nr_segs, get_blocks_t get_blocks, dio_iodone_t end_io,
+ unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
int lock_type);
enum {
@@ -1657,29 +1654,29 @@ enum {
static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
struct inode *inode, struct block_device *bdev, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs, get_blocks_t get_blocks,
+ loff_t offset, unsigned long nr_segs, get_block_t get_block,
dio_iodone_t end_io)
{
return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
- nr_segs, get_blocks, end_io, DIO_LOCKING);
+ nr_segs, get_block, end_io, DIO_LOCKING);
}
static inline ssize_t blockdev_direct_IO_no_locking(int rw, struct kiocb *iocb,
struct inode *inode, struct block_device *bdev, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs, get_blocks_t get_blocks,
+ loff_t offset, unsigned long nr_segs, get_block_t get_block,
dio_iodone_t end_io)
{
return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
- nr_segs, get_blocks, end_io, DIO_NO_LOCKING);
+ nr_segs, get_block, end_io, DIO_NO_LOCKING);
}
static inline ssize_t blockdev_direct_IO_own_locking(int rw, struct kiocb *iocb,
struct inode *inode, struct block_device *bdev, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs, get_blocks_t get_blocks,
+ loff_t offset, unsigned long nr_segs, get_block_t get_block,
dio_iodone_t end_io)
{
return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
- nr_segs, get_blocks, end_io, DIO_OWN_LOCKING);
+ nr_segs, get_block, end_io, DIO_OWN_LOCKING);
}
extern const struct file_operations generic_ro_fops;
Index: linux-2.6.16-rc3-mm1/fs/block_dev.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/block_dev.c 2006-02-15 14:24:52.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/block_dev.c 2006-02-15 14:28:06.000000000 -0800
@@ -133,9 +133,10 @@ blkdev_get_block(struct inode *inode, se
static int
blkdev_get_blocks(struct inode *inode, sector_t iblock,
- unsigned long max_blocks, struct buffer_head *bh, int create)
+ struct buffer_head *bh, int create)
{
sector_t end_block = max_block(I_BDEV(inode));
+ unsigned long max_blocks = bh->b_size >> inode->i_blkbits;
if ((iblock + max_blocks) > end_block) {
max_blocks = end_block - iblock;
Index: linux-2.6.16-rc3-mm1/fs/jfs/inode.c
===================================================================
--- linux-2.6.16-rc3-mm1.orig/fs/jfs/inode.c 2006-02-15 14:26:14.000000000 -0800
+++ linux-2.6.16-rc3-mm1/fs/jfs/inode.c 2006-02-15 14:28:06.000000000 -0800
@@ -301,7 +301,7 @@ static ssize_t jfs_direct_IO(int rw, str
struct inode *inode = file->f_mapping->host;
return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, jfs_get_blocks, NULL);
+ offset, nr_segs, jfs_get_block, NULL);
}
struct address_space_operations jfs_aops = {
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