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-rw-r--r--arch/mips/include/asm/compat.h3
-rw-r--r--arch/parisc/include/asm/compat.h3
-rw-r--r--arch/powerpc/include/asm/compat.h3
-rw-r--r--arch/s390/include/asm/compat.h3
-rw-r--r--arch/sparc/include/asm/compat.h3
-rw-r--r--arch/x86/include/asm/compat.h3
-rw-r--r--fs/btrfs/file.c2
-rw-r--r--fs/buffer.c4
-rw-r--r--fs/cifs/cifsfs.c2
-rw-r--r--fs/compat.c7
-rw-r--r--fs/direct-io.c646
-rw-r--r--fs/ext4/file.c47
-rw-r--r--fs/gfs2/file.c4
-rw-r--r--fs/inode.c2
-rw-r--r--fs/namei.c17
-rw-r--r--fs/namespace.c1
-rw-r--r--fs/nfs/file.c10
-rw-r--r--fs/open.c4
-rw-r--r--fs/posix_acl.c2
-rw-r--r--fs/read_write.c74
-rw-r--r--include/linux/fs.h28
-rw-r--r--mm/filemap.c3
22 files changed, 440 insertions, 431 deletions
diff --git a/arch/mips/include/asm/compat.h b/arch/mips/include/asm/compat.h
index dbc51065df5..b77df0366ee 100644
--- a/arch/mips/include/asm/compat.h
+++ b/arch/mips/include/asm/compat.h
@@ -111,7 +111,8 @@ struct compat_statfs {
int f_bavail;
compat_fsid_t f_fsid;
int f_namelen;
- int f_spare[6];
+ int f_flags;
+ int f_spare[5];
};
#define COMPAT_RLIM_INFINITY 0x7fffffffUL
diff --git a/arch/parisc/include/asm/compat.h b/arch/parisc/include/asm/compat.h
index efa0b60c63f..760f331d4fa 100644
--- a/arch/parisc/include/asm/compat.h
+++ b/arch/parisc/include/asm/compat.h
@@ -105,7 +105,8 @@ struct compat_statfs {
__kernel_fsid_t f_fsid;
s32 f_namelen;
s32 f_frsize;
- s32 f_spare[5];
+ s32 f_flags;
+ s32 f_spare[4];
};
struct compat_sigcontext {
diff --git a/arch/powerpc/include/asm/compat.h b/arch/powerpc/include/asm/compat.h
index 91010e8f847..88e602f6430 100644
--- a/arch/powerpc/include/asm/compat.h
+++ b/arch/powerpc/include/asm/compat.h
@@ -100,7 +100,8 @@ struct compat_statfs {
compat_fsid_t f_fsid;
int f_namelen; /* SunOS ignores this field. */
int f_frsize;
- int f_spare[5];
+ int f_flags;
+ int f_spare[4];
};
#define COMPAT_RLIM_OLD_INFINITY 0x7fffffff
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index da359ca6fe5..cdb9b78f6c0 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -131,7 +131,8 @@ struct compat_statfs {
compat_fsid_t f_fsid;
s32 f_namelen;
s32 f_frsize;
- s32 f_spare[6];
+ s32 f_flags;
+ s32 f_spare[5];
};
#define COMPAT_RLIM_OLD_INFINITY 0x7fffffff
diff --git a/arch/sparc/include/asm/compat.h b/arch/sparc/include/asm/compat.h
index 6f57325bb88..b8be20d42a0 100644
--- a/arch/sparc/include/asm/compat.h
+++ b/arch/sparc/include/asm/compat.h
@@ -134,7 +134,8 @@ struct compat_statfs {
compat_fsid_t f_fsid;
int f_namelen; /* SunOS ignores this field. */
int f_frsize;
- int f_spare[5];
+ int f_flags;
+ int f_spare[4];
};
#define COMPAT_RLIM_INFINITY 0x7fffffff
diff --git a/arch/x86/include/asm/compat.h b/arch/x86/include/asm/compat.h
index 1d9cd27c292..30d737ef2a4 100644
--- a/arch/x86/include/asm/compat.h
+++ b/arch/x86/include/asm/compat.h
@@ -108,7 +108,8 @@ struct compat_statfs {
compat_fsid_t f_fsid;
int f_namelen; /* SunOS ignores this field. */
int f_frsize;
- int f_spare[5];
+ int f_flags;
+ int f_spare[4];
};
#define COMPAT_RLIM_OLD_INFINITY 0x7fffffff
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index e4e57d59edb..1266f6e9cdb 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1821,7 +1821,7 @@ static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int origin)
switch (origin) {
case SEEK_END:
case SEEK_CUR:
- offset = generic_file_llseek_unlocked(file, offset, origin);
+ offset = generic_file_llseek(file, offset, origin);
goto out;
case SEEK_DATA:
case SEEK_HOLE:
diff --git a/fs/buffer.c b/fs/buffer.c
index 1a80b048ade..936d6035f6e 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1470,13 +1470,13 @@ static void discard_buffer(struct buffer_head * bh)
}
/**
- * block_invalidatepage - invalidate part of all of a buffer-backed page
+ * block_invalidatepage - invalidate part or all of a buffer-backed page
*
* @page: the page which is affected
* @offset: the index of the truncation point
*
* block_invalidatepage() is called when all or part of the page has become
- * invalidatedby a truncate operation.
+ * invalidated by a truncate operation.
*
* block_invalidatepage() does not have to release all buffers, but it must
* ensure that no dirty buffer is left outside @offset and that no I/O
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index f219dccbe15..8f1fe324162 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -730,7 +730,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
if (rc < 0)
return (loff_t)rc;
}
- return generic_file_llseek_unlocked(file, offset, origin);
+ return generic_file_llseek(file, offset, origin);
}
static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
diff --git a/fs/compat.c b/fs/compat.c
index 05e3f3d2cd7..302e761bd0a 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -246,11 +246,8 @@ static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *
__put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
__put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
__put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
- __put_user(0, &ubuf->f_spare[0]) ||
- __put_user(0, &ubuf->f_spare[1]) ||
- __put_user(0, &ubuf->f_spare[2]) ||
- __put_user(0, &ubuf->f_spare[3]) ||
- __put_user(0, &ubuf->f_spare[4]))
+ __put_user(kbuf->f_flags, &ubuf->f_flags) ||
+ __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
return -EFAULT;
return 0;
}
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 44a360ca804..d740ab67ff6 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -39,7 +39,7 @@
/*
* How many user pages to map in one call to get_user_pages(). This determines
- * the size of a structure on the stack.
+ * the size of a structure in the slab cache
*/
#define DIO_PAGES 64
@@ -55,13 +55,10 @@
* blocksize.
*/
-struct dio {
- /* BIO submission state */
+/* dio_state only used in the submission path */
+
+struct dio_submit {
struct bio *bio; /* bio under assembly */
- struct inode *inode;
- int rw;
- loff_t i_size; /* i_size when submitted */
- int flags; /* doesn't change */
unsigned blkbits; /* doesn't change */
unsigned blkfactor; /* When we're using an alignment which
is finer than the filesystem's soft
@@ -76,18 +73,17 @@ struct dio {
sector_t block_in_file; /* Current offset into the underlying
file in dio_block units. */
unsigned blocks_available; /* At block_in_file. changes */
+ int reap_counter; /* rate limit reaping */
sector_t final_block_in_request;/* doesn't change */
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_block_t *get_block; /* block mapping function */
- dio_iodone_t *end_io; /* IO completion function */
dio_submit_t *submit_io; /* IO submition function */
+
loff_t logical_offset_in_bio; /* current first logical block in bio */
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_block() result */
/*
* Deferred addition of a page to the dio. These variables are
@@ -100,18 +96,6 @@ struct dio {
sector_t cur_page_block; /* Where it starts */
loff_t cur_page_fs_offset; /* Offset in file */
- /* BIO completion state */
- spinlock_t bio_lock; /* protects BIO fields below */
- unsigned long refcount; /* direct_io_worker() and bios */
- struct bio *bio_list; /* singly linked via bi_private */
- struct task_struct *waiter; /* waiting task (NULL if none) */
-
- /* AIO related stuff */
- struct kiocb *iocb; /* kiocb */
- int is_async; /* is IO async ? */
- int io_error; /* IO error in completion path */
- ssize_t result; /* IO result */
-
/*
* Page fetching state. These variables belong to dio_refill_pages().
*/
@@ -125,7 +109,30 @@ struct dio {
*/
unsigned head; /* next page to process */
unsigned tail; /* last valid page + 1 */
+};
+
+/* dio_state communicated between submission path and end_io */
+struct dio {
+ int flags; /* doesn't change */
+ int rw;
+ struct inode *inode;
+ loff_t i_size; /* i_size when submitted */
+ dio_iodone_t *end_io; /* IO completion function */
+
+ void *private; /* copy from map_bh.b_private */
+
+ /* BIO completion state */
+ spinlock_t bio_lock; /* protects BIO fields below */
int page_errors; /* errno from get_user_pages() */
+ int is_async; /* is IO async ? */
+ int io_error; /* IO error in completion path */
+ unsigned long refcount; /* direct_io_worker() and bios */
+ struct bio *bio_list; /* singly linked via bi_private */
+ struct task_struct *waiter; /* waiting task (NULL if none) */
+
+ /* AIO related stuff */
+ struct kiocb *iocb; /* kiocb */
+ ssize_t result; /* IO result */
/*
* pages[] (and any fields placed after it) are not zeroed out at
@@ -133,7 +140,9 @@ struct dio {
* wish that they not be zeroed.
*/
struct page *pages[DIO_PAGES]; /* page buffer */
-};
+} ____cacheline_aligned_in_smp;
+
+static struct kmem_cache *dio_cache __read_mostly;
static void __inode_dio_wait(struct inode *inode)
{
@@ -182,27 +191,27 @@ EXPORT_SYMBOL_GPL(inode_dio_done);
/*
* How many pages are in the queue?
*/
-static inline unsigned dio_pages_present(struct dio *dio)
+static inline unsigned dio_pages_present(struct dio_submit *sdio)
{
- return dio->tail - dio->head;
+ return sdio->tail - sdio->head;
}
/*
* Go grab and pin some userspace pages. Typically we'll get 64 at a time.
*/
-static int dio_refill_pages(struct dio *dio)
+static inline int dio_refill_pages(struct dio *dio, struct dio_submit *sdio)
{
int ret;
int nr_pages;
- nr_pages = min(dio->total_pages - dio->curr_page, DIO_PAGES);
+ nr_pages = min(sdio->total_pages - sdio->curr_page, DIO_PAGES);
ret = get_user_pages_fast(
- dio->curr_user_address, /* Where from? */
+ sdio->curr_user_address, /* Where from? */
nr_pages, /* How many pages? */
dio->rw == READ, /* Write to memory? */
&dio->pages[0]); /* Put results here */
- if (ret < 0 && dio->blocks_available && (dio->rw & WRITE)) {
+ if (ret < 0 && sdio->blocks_available && (dio->rw & WRITE)) {
struct page *page = ZERO_PAGE(0);
/*
* A memory fault, but the filesystem has some outstanding
@@ -213,17 +222,17 @@ static int dio_refill_pages(struct dio *dio)
dio->page_errors = ret;
page_cache_get(page);
dio->pages[0] = page;
- dio->head = 0;
- dio->tail = 1;
+ sdio->head = 0;
+ sdio->tail = 1;
ret = 0;
goto out;
}
if (ret >= 0) {
- dio->curr_user_address += ret * PAGE_SIZE;
- dio->curr_page += ret;
- dio->head = 0;
- dio->tail = ret;
+ sdio->curr_user_address += ret * PAGE_SIZE;
+ sdio->curr_page += ret;
+ sdio->head = 0;
+ sdio->tail = ret;
ret = 0;
}
out:
@@ -236,17 +245,18 @@ out:
* decent number of pages, less frequently. To provide nicer use of the
* L1 cache.
*/
-static struct page *dio_get_page(struct dio *dio)
+static inline struct page *dio_get_page(struct dio *dio,
+ struct dio_submit *sdio)
{
- if (dio_pages_present(dio) == 0) {
+ if (dio_pages_present(sdio) == 0) {
int ret;
- ret = dio_refill_pages(dio);
+ ret = dio_refill_pages(dio, sdio);
if (ret)
return ERR_PTR(ret);
- BUG_ON(dio_pages_present(dio) == 0);
+ BUG_ON(dio_pages_present(sdio) == 0);
}
- return dio->pages[dio->head++];
+ return dio->pages[sdio->head++];
}
/**
@@ -292,7 +302,7 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is
if (dio->end_io && dio->result) {
dio->end_io(dio->iocb, offset, transferred,
- dio->map_bh.b_private, ret, is_async);
+ dio->private, ret, is_async);
} else {
if (is_async)
aio_complete(dio->iocb, ret, 0);
@@ -323,7 +333,7 @@ static void dio_bio_end_aio(struct bio *bio, int error)
if (remaining == 0) {
dio_complete(dio, dio->iocb->ki_pos, 0, true);
- kfree(dio);
+ kmem_cache_free(dio_cache, dio);
}
}
@@ -367,9 +377,10 @@ void dio_end_io(struct bio *bio, int error)
}
EXPORT_SYMBOL_GPL(dio_end_io);
-static void
-dio_bio_alloc(struct dio *dio, struct block_device *bdev,
- sector_t first_sector, int nr_vecs)
+static inline void
+dio_bio_alloc(struct dio *dio, struct dio_submit *sdio,
+ struct block_device *bdev,
+ sector_t first_sector, int nr_vecs)
{
struct bio *bio;
@@ -386,8 +397,8 @@ dio_bio_alloc(struct dio *dio, struct block_device *bdev,
else
bio->bi_end_io = dio_bio_end_io;
- dio->bio = bio;
- dio->logical_offset_in_bio = dio->cur_page_fs_offset;
+ sdio->bio = bio;
+ sdio->logical_offset_in_bio = sdio->cur_page_fs_offset;
}
/*
@@ -397,9 +408,9 @@ dio_bio_alloc(struct dio *dio, struct block_device *bdev,
*
* bios hold a dio reference between submit_bio and ->end_io.
*/
-static void dio_bio_submit(struct dio *dio)
+static inline void dio_bio_submit(struct dio *dio, struct dio_submit *sdio)
{
- struct bio *bio = dio->bio;
+ struct bio *bio = sdio->bio;
unsigned long flags;
bio->bi_private = dio;
@@ -411,24 +422,24 @@ static void dio_bio_submit(struct dio *dio)
if (dio->is_async && dio->rw == READ)
bio_set_pages_dirty(bio);
- if (dio->submit_io)
- dio->submit_io(dio->rw, bio, dio->inode,
- dio->logical_offset_in_bio);
+ if (sdio->submit_io)
+ sdio->submit_io(dio->rw, bio, dio->inode,
+ sdio->logical_offset_in_bio);
else
submit_bio(dio->rw, bio);
- dio->bio = NULL;
- dio->boundary = 0;
- dio->logical_offset_in_bio = 0;
+ sdio->bio = NULL;
+ sdio->boundary = 0;
+ sdio->logical_offset_in_bio = 0;
}
/*
* Release any resources in case of a failure
*/
-static void dio_cleanup(struct dio *dio)
+static inline void dio_cleanup(struct dio *dio, struct dio_submit *sdio)
{
- while (dio_pages_present(dio))
- page_cache_release(dio_get_page(dio));
+ while (dio_pages_present(sdio))
+ page_cache_release(dio_get_page(dio, sdio));
}
/*
@@ -518,11 +529,11 @@ static void dio_await_completion(struct dio *dio)
*
* This also helps to limit the peak amount of pinned userspace memory.
*/
-static int dio_bio_reap(struct dio *dio)
+static inline int dio_bio_reap(struct dio *dio, struct dio_submit *sdio)
{
int ret = 0;
- if (dio->reap_counter++ >= 64) {
+ if (sdio->reap_counter++ >= 64) {
while (dio->bio_list) {
unsigned long flags;
struct bio *bio;
@@ -536,14 +547,14 @@ static int dio_bio_reap(struct dio *dio)
if (ret == 0)
ret = ret2;
}
- dio->reap_counter = 0;
+ sdio->reap_counter = 0;
}
return ret;
}
/*
* Call into the fs to map some more disk blocks. We record the current number
- * of available blocks at dio->blocks_available. These are in units of the
+ * of available blocks at sdio->blocks_available. These are in units of the
* fs blocksize, (1 << inode->i_blkbits).
*
* The fs is allowed to map lots of blocks at once. If it wants to do that,
@@ -564,10 +575,10 @@ static int dio_bio_reap(struct dio *dio)
* buffer_mapped(). However the direct-io code will only process holes one
* block at a time - it will repeatedly call get_block() as it walks the hole.
*/
-static int get_more_blocks(struct dio *dio)
+static int get_more_blocks(struct dio *dio, struct dio_submit *sdio,
+ struct buffer_head *map_bh)
{
int ret;
- struct buffer_head *map_bh = &dio->map_bh;
sector_t fs_startblk; /* Into file, in filesystem-sized blocks */
unsigned long fs_count; /* Number of filesystem-sized blocks */
unsigned long dio_count;/* Number of dio_block-sized blocks */
@@ -580,11 +591,11 @@ static int get_more_blocks(struct dio *dio)
*/
ret = dio->page_errors;
if (ret == 0) {
- BUG_ON(dio->block_in_file >= dio->final_block_in_request);
- fs_startblk = dio->block_in_file >> dio->blkfactor;
- dio_count = dio->final_block_in_request - dio->block_in_file;
- fs_count = dio_count >> dio->blkfactor;
- blkmask = (1 << dio->blkfactor) - 1;
+ BUG_ON(sdio->block_in_file >= sdio->final_block_in_request);
+ fs_startblk = sdio->block_in_file >> sdio->blkfactor;
+ dio_count = sdio->final_block_in_request - sdio->block_in_file;
+ fs_count = dio_count >> sdio->blkfactor;
+ blkmask = (1 << sdio->blkfactor) - 1;
if (dio_count & blkmask)
fs_count++;
@@ -604,13 +615,16 @@ static int get_more_blocks(struct dio *dio)
*/
create = dio->rw & WRITE;
if (dio->flags & DIO_SKIP_HOLES) {
- if (dio->block_in_file < (i_size_read(dio->inode) >>
- dio->blkbits))
+ if (sdio->block_in_file < (i_size_read(dio->inode) >>
+ sdio->blkbits))
create = 0;
}
- ret = (*dio->get_block)(dio->inode, fs_startblk,
+ ret = (*sdio->get_block)(dio->inode, fs_startblk,
map_bh, create);
+
+ /* Store for completion */
+ dio->private = map_bh->b_private;
}
return ret;
}
@@ -618,20 +632,21 @@ static int get_more_blocks(struct dio *dio)
/*
* There is no bio. Make one now.
*/
-static int dio_new_bio(struct dio *dio, sector_t start_sector)
+static inline int dio_new_bio(struct dio *dio, struct dio_submit *sdio,
+ sector_t start_sector, struct buffer_head *map_bh)
{
sector_t sector;
int ret, nr_pages;
- ret = dio_bio_reap(dio);
+ ret = dio_bio_reap(dio, sdio);
if (ret)
goto out;
- sector = start_sector << (dio->blkbits - 9);
- nr_pages = min(dio->pages_in_io, bio_get_nr_vecs(dio->map_bh.b_bdev));
+ sector = start_sector << (sdio->blkbits - 9);
+ nr_pages = min(sdio->pages_in_io, bio_get_nr_vecs(map_bh->b_bdev));
nr_pages = min(nr_pages, BIO_MAX_PAGES);
BUG_ON(nr_pages <= 0);
- dio_bio_alloc(dio, dio->map_bh.b_bdev, sector, nr_pages);
- dio->boundary = 0;
+ dio_bio_alloc(dio, sdio, map_bh->b_bdev, sector, nr_pages);
+ sdio->boundary = 0;
out:
return ret;
}
@@ -643,21 +658,21 @@ out:
*
* Return zero on success. Non-zero means the caller needs to start a new BIO.
*/
-static int dio_bio_add_page(struct dio *dio)
+static inline int dio_bio_add_page(struct dio_submit *sdio)
{
int ret;
- ret = bio_add_page(dio->bio, dio->cur_page,
- dio->cur_page_len, dio->cur_page_offset);
- if (ret == dio->cur_page_len) {
+ ret = bio_add_page(sdio->bio, sdio->cur_page,
+ sdio->cur_page_len, sdio->cur_page_offset);
+ if (ret == sdio->cur_page_len) {
/*
* Decrement count only, if we are done with this page
*/
- if ((dio->cur_page_len + dio->cur_page_offset) == PAGE_SIZE)
- dio->pages_in_io--;
- page_cache_get(dio->cur_page);
- dio->final_block_in_bio = dio->cur_page_block +
- (dio->cur_page_len >> dio->blkbits);
+ if ((sdio->cur_page_len + sdio->cur_page_offset) == PAGE_SIZE)
+ sdio->pages_in_io--;
+ page_cache_get(sdio->cur_page);
+ sdio->final_block_in_bio = sdio->cur_page_block +
+ (sdio->cur_page_len >> sdio->blkbits);
ret = 0;
} else {
ret = 1;
@@ -675,14 +690,15 @@ static int dio_bio_add_page(struct dio *dio)
* The caller of this function is responsible for removing cur_page from the
* dio, and for dropping the refcount which came from that presence.
*/
-static int dio_send_cur_page(struct dio *dio)
+static inline int dio_send_cur_page(struct dio *dio, struct dio_submit *sdio,
+ struct buffer_head *map_bh)
{
int ret = 0;
- if (dio->bio) {
- loff_t cur_offset = dio->cur_page_fs_offset;
- loff_t bio_next_offset = dio->logical_offset_in_bio +
- dio->bio->bi_size;
+ if (sdio->bio) {
+ loff_t cur_offset = sdio->cur_page_fs_offset;
+ loff_t bio_next_offset = sdio->logical_offset_in_bio +
+ sdio->bio->bi_size;
/*
* See whether this new request is contiguous with the old.
@@ -698,28 +714,28 @@ static int dio_send_cur_page(struct dio *dio)
* be the next logical offset in the bio, submit the bio we
* have.
*/
- if (dio->final_block_in_bio != dio->cur_page_block ||
+ if (sdio->final_block_in_bio != sdio->cur_page_block ||
cur_offset != bio_next_offset)
- dio_bio_submit(dio);
+ dio_bio_submit(dio, sdio);
/*
* Submit now if the underlying fs is about to perform a
* metadata read
*/
- else if (dio->boundary)
- dio_bio_submit(dio);
+ else if (sdio->boundary)
+ dio_bio_submit(dio, sdio);
}
- if (dio->bio == NULL) {
- ret = dio_new_bio(dio, dio->cur_page_block);
+ if (sdio->bio == NULL) {
+ ret = dio_new_bio(dio, sdio, sdio->cur_page_block, map_bh);
if (ret)
goto out;
}
- if (dio_bio_add_page(dio) != 0) {
- dio_bio_submit(dio);
- ret = dio_new_bio(dio, dio->cur_page_block);
+ if (dio_bio_add_page(sdio) != 0) {
+ dio_bio_submit(dio, sdio);
+ ret = dio_new_bio(dio, sdio, sdio->cur_page_block, map_bh);
if (ret == 0) {
- ret = dio_bio_add_page(dio);
+ ret = dio_bio_add_page(sdio);
BUG_ON(ret != 0);
}
}
@@ -744,9 +760,10 @@ out:
* If that doesn't work out then we put the old page into the bio and add this
* page to the dio instead.
*/
-static int
-submit_page_section(struct dio *dio, struct page *page,
- unsigned offset, unsigned len, sector_t blocknr)
+static inline int
+submit_page_section(struct dio *dio, struct dio_submit *sdio, struct page *page,
+ unsigned offset, unsigned len, sector_t blocknr,
+ struct buffer_head *map_bh)
{
int ret = 0;
@@ -760,20 +777,20 @@ submit_page_section(struct dio *dio, struct page *page,
/*
* Can we just grow the current page's presence in the dio?
*/
- if ( (dio->cur_page == page) &&
- (dio->cur_page_offset + dio->cur_page_len == offset) &&
- (dio->cur_page_block +
- (dio->cur_page_len >> dio->blkbits) == blocknr)) {
- dio->cur_page_len += len;
+ if (sdio->cur_page == page &&
+ sdio->cur_page_offset + sdio->cur_page_len == offset &&
+ sdio->cur_page_block +
+ (sdio->cur_page_len >> sdio->blkbits) == blocknr) {
+ sdio->cur_page_len += len;
/*
- * If dio->boundary then we want to schedule the IO now to
+ * If sdio->boundary then we want to schedule the IO now to
* avoid metadata seeks.
*/
- if (dio->boundary) {
- ret = dio_send_cur_page(dio);
- page_cache_release(dio->cur_page);
- dio->cur_page = NULL;
+ if (sdio->boundary) {
+ ret = dio_send_cur_page(dio, sdio, map_bh);
+ page_cache_release(sdio->cur_page);
+ sdio->cur_page = NULL;
}
goto out;
}
@@ -781,20 +798,20 @@ submit_page_section(struct dio *dio, struct page *page,
/*
* If there's a deferred page already there then send it.
*/
- if (dio->cur_page) {
- ret = dio_send_cur_page(dio);
- page_cache_release(dio->cur_page);
- dio->cur_page = NULL;
+ if (sdio->cur_page) {
+ ret = dio_send_cur_page(dio, sdio, map_bh);
+ page_cache_release(sdio->cur_page);
+ sdio->cur_page = NULL;
if (ret)
goto out;
}
page_cache_get(page); /* It is in dio */
- dio->cur_page = page;
- dio->cur_page_offset = offset;
- dio->cur_page_len = len;
- dio->cur_page_block = blocknr;
- dio->cur_page_fs_offset = dio->block_in_file << dio->blkbits;
+ sdio->cur_page = page;
+ sdio->cur_page_offset = offset;
+ sdio->cur_page_len = len;
+ sdio->cur_page_block = blocknr;
+ sdio->cur_page_fs_offset = sdio->block_in_file << sdio->blkbits;
out:
return ret;
}
@@ -804,16 +821,16 @@ out:
* file blocks. Only called for S_ISREG files - blockdevs do not set
* buffer_new
*/
-static void clean_blockdev_aliases(struct dio *dio)
+static void clean_blockdev_aliases(struct dio *dio, struct buffer_head *map_bh)
{
unsigned i;
unsigned nblocks;
- nblocks = dio->map_bh.b_size >> dio->inode->i_blkbits;
+ nblocks = map_bh->b_size >> dio->inode->i_blkbits;
for (i = 0; i < nblocks; i++) {
- unmap_underlying_metadata(dio->map_bh.b_bdev,
- dio->map_bh.b_blocknr + i);
+ unmap_underlying_metadata(map_bh->b_bdev,
+ map_bh->b_blocknr + i);
}
}
@@ -826,19 +843,20 @@ static void clean_blockdev_aliases(struct dio *dio)
* `end' is zero if we're doing the start of the IO, 1 at the end of the
* IO.
*/
-static void dio_zero_block(struct dio *dio, int end)
+static inline void dio_zero_block(struct dio *dio, struct dio_submit *sdio,
+ int end, struct buffer_head *map_bh)
{
unsigned dio_blocks_per_fs_block;
unsigned this_chunk_blocks; /* In dio_blocks */
unsigned this_chunk_bytes;
struct page *page;
- dio->start_zero_done = 1;
- if (!dio->blkfactor || !buffer_new(&dio->map_bh))
+ sdio->start_zero_done = 1;
+ if (!sdio->blkfactor || !buffer_new(map_bh))
return;
- dio_blocks_per_fs_block = 1 << dio->blkfactor;
- this_chunk_blocks = dio->block_in_file & (dio_blocks_per_fs_block - 1);
+ dio_blocks_per_fs_block = 1 << sdio->blkfactor;
+ this_chunk_blocks = sdio->block_in_file & (dio_blocks_per_fs_block - 1);
if (!this_chunk_blocks)
return;
@@ -850,14 +868,14 @@ static void dio_zero_block(struct dio *dio, int end)
if (end)
this_chunk_blocks = dio_blocks_per_fs_block - this_chunk_blocks;
- this_chunk_bytes = this_chunk_blocks << dio->blkbits;
+ this_chunk_bytes = this_chunk_blocks << sdio->blkbits;
page = ZERO_PAGE(0);
- if (submit_page_section(dio, page, 0, this_chunk_bytes,
- dio->next_block_for_io))
+ if (submit_page_section(dio, sdio, page, 0, this_chunk_bytes,
+ sdio->next_block_for_io, map_bh))
return;
- dio->next_block_for_io += this_chunk_blocks;
+ sdio->next_block_for_io += this_chunk_blocks;
}
/*
@@ -876,20 +894,20 @@ static void dio_zero_block(struct dio *dio, int end)
* 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)
+static int do_direct_IO(struct dio *dio, struct dio_submit *sdio,
+ struct buffer_head *map_bh)
{
- const unsigned blkbits = dio->blkbits;
+ const unsigned blkbits = sdio->blkbits;
const unsigned blocks_per_page = PAGE_SIZE >> blkbits;
struct page *page;
unsigned block_in_page;
- struct buffer_head *map_bh = &dio->map_bh;
int ret = 0;
/* The I/O can start at any block offset within the first page */
- block_in_page = dio->first_block_in_page;
+ block_in_page = sdio->first_block_in_page;
- while (dio->block_in_file < dio->final_block_in_request) {
- page = dio_get_page(dio);
+ while (sdio->block_in_file < sdio->final_block_in_request) {
+ page = dio_get_page(dio, sdio);
if (IS_ERR(page)) {
ret = PTR_ERR(page);
goto out;
@@ -901,14 +919,14 @@ static int do_direct_IO(struct dio *dio)
unsigned this_chunk_blocks; /* # of blocks */
unsigned u;
- if (dio->blocks_available == 0) {
+ if (sdio->blocks_available == 0) {
/*
* Need to go and map some more disk
*/
unsigned long blkmask;
unsigned long dio_remainder;
- ret = get_more_blocks(dio);
+ ret = get_more_blocks(dio, sdio, map_bh);
if (ret) {
page_cache_release(page);
goto out;
@@ -916,18 +934,18 @@ static int do_direct_IO(struct dio *dio)
if (!buffer_mapped(map_bh))
goto do_holes;
- dio->blocks_available =
- map_bh->b_size >> dio->blkbits;
- dio->next_block_for_io =
- map_bh->b_blocknr << dio->blkfactor;
+ sdio->blocks_available =
+ map_bh->b_size >> sdio->blkbits;
+ sdio->next_block_for_io =
+ map_bh->b_blocknr << sdio->blkfactor;
if (buffer_new(map_bh))
- clean_blockdev_aliases(dio);
+ clean_blockdev_aliases(dio, map_bh);
- if (!dio->blkfactor)
+ if (!sdio->blkfactor)
goto do_holes;
- blkmask = (1 << dio->blkfactor) - 1;
- dio_remainder = (dio->block_in_file & blkmask);
+ blkmask = (1 << sdio->blkfactor) - 1;
+ dio_remainder = (sdio->block_in_file & blkmask);
/*
* If we are at the start of IO and that IO
@@ -941,8 +959,8 @@ static int do_direct_IO(struct dio *dio)
* on-disk
*/
if (!buffer_new(map_bh))
- dio->next_block_for_io += dio_remainder;
- dio->blocks_available -= dio_remainder;
+ sdio->next_block_for_io += dio_remainder;
+ sdio->blocks_available -= dio_remainder;
}
do_holes:
/* Handle holes */
@@ -961,7 +979,7 @@ do_holes:
*/
i_size_aligned = ALIGN(i_size_read(dio->inode),
1 << blkbits);
- if (dio->block_in_file >=
+ if (sdio->block_in_file >=
i_size_aligned >> blkbits) {
/* We hit eof */
page_cache_release(page);
@@ -969,7 +987,7 @@ do_holes:
}
zero_user(page, block_in_page << blkbits,
1 << blkbits);
- dio->block_in_file++;
+ sdio->block_in_file++;
block_in_page++;
goto next_block;
}
@@ -979,38 +997,41 @@ do_holes:
* is finer than the underlying fs, go check to see if
* we must zero out the start of this block.
*/
- if (unlikely(dio->blkfactor && !dio->start_zero_done))
- dio_zero_block(dio, 0);
+ if (unlikely(sdio->blkfactor && !sdio->start_zero_done))
+ dio_zero_block(dio, sdio, 0, map_bh);
/*
* Work out, in this_chunk_blocks, how much disk we
* can add to this page
*/
- this_chunk_blocks = dio->blocks_available;
+ this_chunk_blocks = sdio->blocks_available;
u = (PAGE_SIZE - offset_in_page) >> blkbits;
if (this_chunk_blocks > u)
this_chunk_blocks = u;
- u = dio->final_block_in_request - dio->block_in_file;
+ u = sdio->final_block_in_request - sdio->block_in_file;
if (this_chunk_blocks > u)
this_chunk_blocks = u;
this_chunk_bytes = this_chunk_blocks << blkbits;
BUG_ON(this_chunk_bytes == 0);
- dio->boundary = buffer_boundary(map_bh);
- ret = submit_page_section(dio, page, offset_in_page,
- this_chunk_bytes, dio->next_block_for_io);
+ sdio->boundary = buffer_boundary(map_bh);
+ ret = submit_page_section(dio, sdio, page,
+ offset_in_page,
+ this_chunk_bytes,
+ sdio->next_block_for_io,
+ map_bh);
if (ret) {
page_cache_release(page);