Commit 1d8fa7a2 authored by Badari Pulavarty's avatar Badari Pulavarty Committed by Linus Torvalds

[PATCH] remove ->get_blocks() support

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: default avatarBadari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent fa30bd05
......@@ -131,9 +131,10 @@ blkdev_get_block(struct inode *inode, sector_t iblock,
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;
......
......@@ -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
......@@ -211,9 +211,9 @@ static struct page *dio_get_page(struct dio *dio)
/*
* 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)
{
......@@ -493,7 +493,7 @@ 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
......@@ -506,7 +506,7 @@ 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)
{
......@@ -548,7 +548,8 @@ static int get_more_blocks(struct dio *dio)
* 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;
......@@ -783,11 +784,11 @@ static void dio_zero_block(struct dio *dio, int end)
* 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)
......@@ -947,7 +948,7 @@ static int do_direct_IO(struct dio *dio)
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;
......@@ -969,7 +970,7 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
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;
......@@ -1177,7 +1178,7 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
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;
......@@ -1273,7 +1274,7 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
(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)
release_i_mutex = 0;
......
......@@ -667,18 +667,6 @@ static sector_t ext2_bmap(struct address_space *mapping, sector_t block)
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 *iocb, const struct iovec *iov,
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
......
......@@ -940,11 +940,11 @@ ext3_get_blocks_handle(handle_t *handle, struct inode *inode, sector_t iblock,
static int
ext3_direct_io_get_blocks(struct inode *inode, sector_t iblock,
unsigned long max_blocks,
struct buffer_head *bh_result, int create)
{
handle_t *handle = journal_current_handle();
int ret = 0;
unsigned max_blocks = bh_result->b_size >> inode->i_blkbits;
if (!create)
goto get_block; /* A read */
......@@ -989,18 +989,10 @@ ext3_direct_io_get_blocks(struct inode *inode, sector_t iblock,
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);
return ext3_direct_io_get_blocks(inode, iblock, bh_result, create);
}
/*
......
......@@ -101,11 +101,11 @@ static int __fat_get_blocks(struct inode *inode, sector_t iblock,
}
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)
......
......@@ -98,17 +98,6 @@ static int hfs_releasepage(struct page *page, gfp_t mask)
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, struct kiocb *iocb,
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,
......
......@@ -93,17 +93,6 @@ static int hfsplus_releasepage(struct page *page, gfp_t mask)
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 kiocb *iocb,
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,
......
......@@ -302,7 +302,7 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
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 = {
......
......@@ -540,7 +540,6 @@ static sector_t ocfs2_bmap(struct address_space *mapping, sector_t block)
* 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;
......@@ -548,6 +547,7 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
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");
......
......@@ -466,7 +466,6 @@ static int reiserfs_get_block_create_0(struct inode *inode, sector_t block,
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)
{
......
......@@ -1319,12 +1319,12 @@ STATIC int
xfs_get_blocks_direct(
struct inode *inode,
sector_t iblock,
unsigned long max_blocks,
struct buffer_head *bh_result,
int create)
{
return __xfs_get_block(inode, iblock, max_blocks, bh_result,
create, 1, BMAPI_WRITE|BMAPI_DIRECT);
return __xfs_get_block(inode, iblock,
bh_result->b_size >> inode->i_blkbits,
bh_result, create, 1, BMAPI_WRITE|BMAPI_DIRECT);
}
STATIC void
......
......@@ -252,9 +252,6 @@ extern void __init files_init(unsigned long);
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);
......@@ -1645,7 +1642,7 @@ static inline void do_generic_file_read(struct file * filp, loff_t *ppos,
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 {
......@@ -1656,29 +1653,29 @@ 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 struct file_operations generic_ro_fops;
......
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