Dave Kleikamp
2013-Mar-08 22:52 UTC
[Ocfs2-devel] [PATCH V7 -next 11/33] dio: Convert direct_IO to use iov_iter
Change the direct_IO aop to take an iov_iter argument rather than an iovec.
This will get passed down through most filesystems so that only the
__blockdev_direct_IO helper need be aware of whether user or kernel memory
is being passed to the function.
Signed-off-by: Dave Kleikamp <dave.kleikamp at oracle.com>
Cc: Eric Van Hensbergen <ericvh at gmail.com>
Cc: Ron Minnich <rminnich at sandia.gov>
Cc: Latchesar Ionkov <lucho at ionkov.net>
Cc: v9fs-developer at lists.sourceforge.net
Cc: Alexander Viro <viro at zeniv.linux.org.uk>
Cc: linux-fsdevel at vger.kernel.org
Cc: Chris Mason <chris.mason at fusionio.com>
Cc: linux-btrfs at vger.kernel.org
Cc: Sage Weil <sage at inktank.com>
Cc: ceph-devel at vger.kernel.org
Cc: Jan Kara <jack at suse.cz>
Cc: linux-ext4 at vger.kernel.org
Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: Andreas Dilger <adilger.kernel at dilger.ca>
Cc: Jaegeuk Kim <jaegeuk.kim at samsung.com>
Cc: linux-f2fs-devel at lists.sourceforge.net
Cc: OGAWA Hirofumi <hirofumi at mail.parknet.co.jp>
Cc: Miklos Szeredi <miklos at szeredi.hu>
Cc: fuse-devel at lists.sourceforge.net
Cc: Steven Whitehouse <swhiteho at redhat.com>
Cc: cluster-devel at redhat.com
Cc: jfs-discussion at lists.sourceforge.net
Cc: Trond Myklebust <Trond.Myklebust at netapp.com>
Cc: linux-nfs at vger.kernel.org
Cc: KONISHI Ryusuke <konishi.ryusuke at lab.ntt.co.jp>
Cc: linux-nilfs at vger.kernel.org
Cc: Mark Fasheh <mfasheh at suse.com>
Cc: Joel Becker <jlbec at evilplan.org>
Cc: ocfs2-devel at oss.oracle.com
Cc: reiserfs-devel at vger.kernel.org
Cc: Ben Myers <bpm at sgi.com>
Cc: Alex Elder <elder at kernel.org>
Cc: xfs at oss.sgi.com
Cc: linux-mm at kvack.org
---
Documentation/filesystems/Locking | 4 +--
Documentation/filesystems/vfs.txt | 4 +--
fs/9p/vfs_addr.c | 8 ++---
fs/block_dev.c | 8 ++---
fs/btrfs/inode.c | 63 +++++++++++++++++++++++----------------
fs/ceph/addr.c | 3 +-
fs/direct-io.c | 19 ++++++------
fs/ext2/inode.c | 8 ++---
fs/ext3/inode.c | 15 ++++------
fs/ext4/ext4.h | 3 +-
fs/ext4/indirect.c | 16 +++++-----
fs/ext4/inode.c | 23 +++++++-------
fs/f2fs/data.c | 4 +--
fs/fat/inode.c | 10 +++----
fs/fuse/cuse.c | 10 +++++--
fs/fuse/file.c | 48 +++++++++++++++--------------
fs/fuse/fuse_i.h | 5 ++--
fs/gfs2/aops.c | 7 ++---
fs/hfs/inode.c | 7 ++---
fs/hfsplus/inode.c | 6 ++--
fs/jfs/inode.c | 7 ++---
fs/nfs/direct.c | 13 ++++----
fs/nilfs2/inode.c | 8 ++---
fs/ocfs2/aops.c | 8 ++---
fs/reiserfs/inode.c | 7 ++---
fs/udf/file.c | 3 +-
fs/udf/inode.c | 10 +++----
fs/xfs/xfs_aops.c | 13 ++++----
include/linux/fs.h | 18 +++++------
include/linux/nfs_fs.h | 3 +-
mm/filemap.c | 13 ++++++--
mm/page_io.c | 8 +++--
32 files changed, 193 insertions(+), 189 deletions(-)
diff --git a/Documentation/filesystems/Locking
b/Documentation/filesystems/Locking
index 0706d32..36dd06c 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -192,8 +192,8 @@ prototypes:
int (*invalidatepage) (struct page *, unsigned long);
int (*releasepage) (struct page *, int);
void (*freepage)(struct page *);
- int (*direct_IO)(int, struct kiocb *, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs);
+ int (*direct_IO)(int, struct kiocb *, struct iov_iter *iter,
+ loff_t offset);
int (*get_xip_mem)(struct address_space *, pgoff_t, int, void **,
unsigned long *);
int (*migratepage)(struct address_space *, struct page *, struct page *);
diff --git a/Documentation/filesystems/vfs.txt
b/Documentation/filesystems/vfs.txt
index bc4b06b..b2d743d 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -569,8 +569,8 @@ struct address_space_operations {
int (*invalidatepage) (struct page *, unsigned long);
int (*releasepage) (struct page *, int);
void (*freepage)(struct page *);
- ssize_t (*direct_IO)(int, struct kiocb *, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs);
+ ssize_t (*direct_IO)(int, struct kiocb *, struct iov_iter *iter,
+ loff_t offset);
struct page* (*get_xip_page)(struct address_space *, sector_t,
int);
/* migrate the contents of a page to the specified target */
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index 055562c..01565cc 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -240,9 +240,8 @@ static int v9fs_launder_page(struct page *page)
* v9fs_direct_IO - 9P address space operation for direct I/O
* @rw: direction (read or write)
* @iocb: target I/O control block
- * @iov: array of vectors that define I/O buffer
+ * @iter: array of vectors that define I/O buffer
* @pos: offset in file to begin the operation
- * @nr_segs: size of iovec array
*
* The presence of v9fs_direct_IO() in the address space ops vector
* allowes open() O_DIRECT flags which would have failed otherwise.
@@ -256,8 +255,7 @@ static int v9fs_launder_page(struct page *page)
*
*/
static ssize_t
-v9fs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
- loff_t pos, unsigned long nr_segs)
+v9fs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t pos)
{
/*
* FIXME
@@ -266,7 +264,7 @@ v9fs_direct_IO(int rw, struct kiocb *iocb, const struct
iovec *iov,
*/
p9_debug(P9_DEBUG_VFS, "v9fs_direct_IO: v9fs_direct_IO (%s)
off/no(%lld/%lu) EINVAL\n",
iocb->ki_filp->f_path.dentry->d_name.name,
- (long long)pos, nr_segs);
+ (long long)pos, iter->nr_segs);
return -EINVAL;
}
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 4d48cf5..0d71c44 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -158,14 +158,14 @@ blkdev_get_block(struct inode *inode, sector_t iblock,
}
static ssize_t
-blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs)
+blkdev_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
+ loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
- return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iov, offset,
- nr_segs, blkdev_get_block, NULL, NULL, 0);
+ return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iter,
+ offset, blkdev_get_block, NULL, NULL, 0);
}
int __sync_blockdev(struct block_device *bdev, int wait)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 2b1871d..42568eb 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7271,8 +7271,7 @@ free_ordered:
}
static ssize_t check_direct_IO(struct btrfs_root *root, int rw, struct kiocb
*iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
int seg;
int i;
@@ -7286,35 +7285,50 @@ static ssize_t check_direct_IO(struct btrfs_root *root,
int rw, struct kiocb *io
goto out;
/* Check the memory alignment. Blocks cannot straddle pages */
- for (seg = 0; seg < nr_segs; seg++) {
- addr = (unsigned long)iov[seg].iov_base;
- size = iov[seg].iov_len;
- end += size;
- if ((addr & blocksize_mask) || (size & blocksize_mask))
- goto out;
+ if (iov_iter_has_iovec(iter)) {
+ const struct iovec *iov = iov_iter_iovec(iter);
+
+ for (seg = 0; seg < iter->nr_segs; seg++) {
+ addr = (unsigned long)iov[seg].iov_base;
+ size = iov[seg].iov_len;
+ end += size;
+ if ((addr & blocksize_mask) || (size & blocksize_mask))
+ goto out;
- /* If this is a write we don't need to check anymore */
- if (rw & WRITE)
- continue;
+ /* If this is a write we don't need to check anymore */
+ if (rw & WRITE)
+ continue;
- /*
- * Check to make sure we don't have duplicate iov_base's in this
- * iovec, if so return EINVAL, otherwise we'll get csum errors
- * when reading back.
- */
- for (i = seg + 1; i < nr_segs; i++) {
- if (iov[seg].iov_base == iov[i].iov_base)
+ /*
+ * Check to make sure we don't have duplicate iov_base's
+ * in this iovec, if so return EINVAL, otherwise we'll
+ * get csum errors when reading back.
+ */
+ for (i = seg + 1; i < iter->nr_segs; i++) {
+ if (iov[seg].iov_base == iov[i].iov_base)
+ goto out;
+ }
+ }
+ } else if (iov_iter_has_bvec(iter)) {
+ struct bio_vec *bvec = iov_iter_bvec(iter);
+
+ for (seg = 0; seg < iter->nr_segs; seg++) {
+ addr = (unsigned long)bvec[seg].bv_offset;
+ size = bvec[seg].bv_len;
+ end += size;
+ if ((addr & blocksize_mask) || (size & blocksize_mask))
goto out;
}
- }
+ } else
+ BUG();
+
retval = 0;
out:
return retval;
}
static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
@@ -7324,15 +7338,14 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb
*iocb,
bool relock = false;
ssize_t ret;
- if (check_direct_IO(BTRFS_I(inode)->root, rw, iocb, iov,
- offset, nr_segs))
+ if (check_direct_IO(BTRFS_I(inode)->root, rw, iocb, iter, offset))
return 0;
atomic_inc(&inode->i_dio_count);
smp_mb__after_atomic_inc();
if (rw & WRITE) {
- count = iov_length(iov, nr_segs);
+ count = iov_iter_count(iter);
/*
* If the write DIO is beyond the EOF, we need update
* the isize, but it is protected by i_mutex. So we can
@@ -7354,7 +7367,7 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
ret = __blockdev_direct_IO(rw, iocb, inode,
BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev,
- iov, offset, nr_segs, btrfs_get_blocks_direct, NULL,
+ iter, offset, btrfs_get_blocks_direct, NULL,
btrfs_submit_direct, flags);
if (rw & WRITE) {
if (ret < 0 && ret != -EIOCBQUEUED)
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index a60ea97..9ecdc0e 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1178,8 +1178,7 @@ static int ceph_write_end(struct file *file, struct
address_space *mapping,
* never get called.
*/
static ssize_t ceph_direct_io(int rw, struct kiocb *iocb,
- const struct iovec *iov,
- loff_t pos, unsigned long nr_segs)
+ struct iov_iter *iter, loff_t pos)
{
WARN_ON(1);
return -EINVAL;
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 55683f3..c9f65de 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1050,9 +1050,9 @@ static inline int drop_refcount(struct dio *dio)
*/
static inline ssize_t
do_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_block_t get_block, dio_iodone_t end_io,
- dio_submit_t submit_io, int flags)
+ struct block_device *bdev, struct iov_iter *iter, loff_t offset,
+ get_block_t get_block, dio_iodone_t end_io, dio_submit_t submit_io,
+ int flags)
{
int seg;
size_t size;
@@ -1068,6 +1068,8 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct
inode *inode,
size_t bytes;
struct buffer_head map_bh = { 0, };
struct blk_plug plug;
+ const struct iovec *iov = iov_iter_iovec(iter);
+ unsigned long nr_segs = iter->nr_segs;
if (rw & WRITE)
rw = WRITE_ODIRECT;
@@ -1286,9 +1288,9 @@ out:
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_block_t get_block, dio_iodone_t end_io,
- dio_submit_t submit_io, int flags)
+ struct block_device *bdev, struct iov_iter *iter, loff_t offset,
+ get_block_t get_block, dio_iodone_t end_io, dio_submit_t submit_io,
+ int flags)
{
/*
* The block device state is needed in the end to finally
@@ -1302,9 +1304,8 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct
inode *inode,
prefetch(bdev->bd_queue);
prefetch((char *)bdev->bd_queue + SMP_CACHE_BYTES);
- return do_blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
- nr_segs, get_block, end_io,
- submit_io, flags);
+ return do_blockdev_direct_IO(rw, iocb, inode, bdev, iter, offset,
+ get_block, end_io, submit_io, flags);
}
EXPORT_SYMBOL(__blockdev_direct_IO);
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 43d72d0..b8933ec 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -846,18 +846,16 @@ static sector_t ext2_bmap(struct address_space *mapping,
sector_t block)
}
static ssize_t
-ext2_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs)
+ext2_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t
offset)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
ssize_t ret;
- ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
- ext2_get_block);
+ ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, ext2_get_block);
if (ret < 0 && (rw & WRITE))
- ext2_write_failed(mapping, offset + iov_length(iov, nr_segs));
+ ext2_write_failed(mapping, offset + iov_iter_count(iter));
return ret;
}
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index eac4f04..72804bd 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1860,8 +1860,7 @@ static int ext3_releasepage(struct page *page, gfp_t wait)
* VFS code falls back into buffered path in that case so we are safe.
*/
static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
@@ -1869,10 +1868,10 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb
*iocb,
handle_t *handle;
ssize_t ret;
int orphan = 0;
- size_t count = iov_length(iov, nr_segs);
+ size_t count = iov_iter_count(iter);
int retries = 0;
- trace_ext3_direct_IO_enter(inode, offset, iov_length(iov, nr_segs), rw);
+ trace_ext3_direct_IO_enter(inode, offset, count, rw);
if (rw == WRITE) {
loff_t final_size = offset + count;
@@ -1896,15 +1895,14 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb
*iocb,
}
retry:
- ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
- ext3_get_block);
+ ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, ext3_get_block);
/*
* In case of error extending write may have instantiated a few
* blocks outside i_size. Trim these off again.
*/
if (unlikely((rw & WRITE) && ret < 0)) {
loff_t isize = i_size_read(inode);
- loff_t end = offset + iov_length(iov, nr_segs);
+ loff_t end = offset + count;
if (end > isize)
ext3_truncate_failed_direct_write(inode);
@@ -1947,8 +1945,7 @@ retry:
ret = err;
}
out:
- trace_ext3_direct_IO_exit(inode, offset,
- iov_length(iov, nr_segs), rw, ret);
+ trace_ext3_direct_IO_exit(inode, offset, count, rw, ret);
return ret;
}
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 4a01ba3..b05618a 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2104,8 +2104,7 @@ extern void ext4_da_update_reserve_space(struct inode
*inode,
extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map, int flags);
extern ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs);
+ struct iov_iter *iter, loff_t offset);
extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock);
extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks, int chunk);
extern void ext4_ind_truncate(struct inode *inode);
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 21de123..de8e9de 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -775,8 +775,7 @@ out:
* VFS code falls back into buffered path in that case so we are safe.
*/
ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
@@ -784,7 +783,7 @@ ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
handle_t *handle;
ssize_t ret;
int orphan = 0;
- size_t count = iov_length(iov, nr_segs);
+ size_t count = iov_iter_count(iter);
int retries = 0;
if (rw == WRITE) {
@@ -828,18 +827,17 @@ retry:
goto locked;
}
ret = __blockdev_direct_IO(rw, iocb, inode,
- inode->i_sb->s_bdev, iov,
- offset, nr_segs,
- ext4_get_block, NULL, NULL, 0);
+ inode->i_sb->s_bdev, iter,
+ offset, ext4_get_block, NULL, NULL, 0);
inode_dio_done(inode);
} else {
locked:
- ret = blockdev_direct_IO(rw, iocb, inode, iov,
- offset, nr_segs, ext4_get_block);
+ ret = blockdev_direct_IO(rw, iocb, inode, iter,
+ offset, ext4_get_block);
if (unlikely((rw & WRITE) && ret < 0)) {
loff_t isize = i_size_read(inode);
- loff_t end = offset + iov_length(iov, nr_segs);
+ loff_t end = offset + iov_iter_count(iter);
if (end > isize)
ext4_truncate_failed_write(inode);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f513f3d..c820273 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2999,13 +2999,12 @@ out:
*
*/
static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
ssize_t ret;
- size_t count = iov_length(iov, nr_segs);
+ size_t count = iov_iter_count(iter);
int overwrite = 0;
get_block_t *get_block_func = NULL;
int dio_flags = 0;
@@ -3013,7 +3012,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb
*iocb,
/* Use the old path for reads and writes beyond i_size. */
if (rw != WRITE || final_size > inode->i_size)
- return ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
+ return ext4_ind_direct_IO(rw, iocb, iter, offset);
BUG_ON(iocb->private == NULL);
@@ -3071,8 +3070,8 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb
*iocb,
dio_flags = DIO_LOCKING;
}
ret = __blockdev_direct_IO(rw, iocb, inode,
- inode->i_sb->s_bdev, iov,
- offset, nr_segs,
+ inode->i_sb->s_bdev, iter,
+ offset,
get_block_func,
ext4_end_io_dio,
NULL,
@@ -3123,8 +3122,7 @@ retake_lock:
}
static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
@@ -3140,13 +3138,12 @@ static ssize_t ext4_direct_IO(int rw, struct kiocb
*iocb,
if (ext4_has_inline_data(inode))
return 0;
- trace_ext4_direct_IO_enter(inode, offset, iov_length(iov, nr_segs), rw);
+ trace_ext4_direct_IO_enter(inode, offset, iov_iter_count(iter), rw);
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
- ret = ext4_ext_direct_IO(rw, iocb, iov, offset, nr_segs);
+ ret = ext4_ext_direct_IO(rw, iocb, iter, offset);
else
- ret = ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
- trace_ext4_direct_IO_exit(inode, offset,
- iov_length(iov, nr_segs), rw, ret);
+ ret = ext4_ind_direct_IO(rw, iocb, iter, offset);
+ trace_ext4_direct_IO_exit(inode, offset, iov_iter_count(iter), rw, ret);
return ret;
}
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index d0ed4ba..1531379 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -655,7 +655,7 @@ static int f2fs_write_begin(struct file *file, struct
address_space *mapping,
}
static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset, unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
@@ -664,7 +664,7 @@ static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
return 0;
/* Needs synchronization with the cleaner */
- return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+ return blockdev_direct_IO(rw, iocb, inode, iter, offset,
get_data_block_ro);
}
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index d1d502a..300d883 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -186,8 +186,7 @@ static int fat_write_end(struct file *file, struct
address_space *mapping,
}
static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov,
- loff_t offset, unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
@@ -204,7 +203,7 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
*
* Return 0, and fallback to normal buffered write.
*/
- loff_t size = offset + iov_length(iov, nr_segs);
+ loff_t size = offset + iov_iter_count(iter);
if (MSDOS_I(inode)->mmu_private < size)
return 0;
}
@@ -213,10 +212,9 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
* FAT need to use the DIO_LOCKING for avoiding the race
* condition of fat_get_block() and ->truncate().
*/
- ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
- fat_get_block);
+ ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, fat_get_block);
if (ret < 0 && (rw & WRITE))
- fat_write_failed(mapping, offset + iov_length(iov, nr_segs));
+ fat_write_failed(mapping, offset + iov_iter_count(iter));
return ret;
}
diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index 06b5e08..53dc8d8 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -93,8 +93,11 @@ static ssize_t cuse_read(struct file *file, char __user *buf,
size_t count,
{
loff_t pos = 0;
struct iovec iov = { .iov_base = buf, .iov_len = count };
+ struct iov_iter ii;
- return fuse_direct_io(file, &iov, 1, count, &pos, 0);
+ iov_iter_init(&ii, &iov, 1, count, 0);
+
+ return fuse_direct_io(file, &ii, count, &pos, 0);
}
static ssize_t cuse_write(struct file *file, const char __user *buf,
@@ -102,12 +105,15 @@ static ssize_t cuse_write(struct file *file, const char
__user *buf,
{
loff_t pos = 0;
struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = count };
+ struct iov_iter ii;
+
+ iov_iter_init(&ii, &iov, 1, count, 0);
/*
* No locking or generic_write_checks(), the server is
* responsible for locking and sanity checks.
*/
- return fuse_direct_io(file, &iov, 1, count, &pos, 1);
+ return fuse_direct_io(file, &ii, count, &pos, 1);
}
static int cuse_open(struct inode *inode, struct file *file)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index a359fe0..89855c8 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1151,9 +1151,8 @@ static inline int fuse_iter_npages(const struct iov_iter
*ii_p)
return min(npages, FUSE_MAX_PAGES_PER_REQ);
}
-ssize_t fuse_direct_io(struct file *file, const struct iovec *iov,
- unsigned long nr_segs, size_t count, loff_t *ppos,
- int write)
+ssize_t fuse_direct_io(struct file *file, struct iov_iter *ii,
+ size_t count, loff_t *ppos, int write)
{
struct fuse_file *ff = file->private_data;
struct fuse_conn *fc = ff->fc;
@@ -1161,11 +1160,8 @@ ssize_t fuse_direct_io(struct file *file, const struct
iovec *iov,
loff_t pos = *ppos;
ssize_t res = 0;
struct fuse_req *req;
- struct iov_iter ii;
-
- iov_iter_init(&ii, iov, nr_segs, count, 0);
- req = fuse_get_req(fc, fuse_iter_npages(&ii));
+ req = fuse_get_req(fc, fuse_iter_npages(ii));
if (IS_ERR(req))
return PTR_ERR(req);
@@ -1173,7 +1169,7 @@ ssize_t fuse_direct_io(struct file *file, const struct
iovec *iov,
size_t nres;
fl_owner_t owner = current->files;
size_t nbytes = min(count, nmax);
- int err = fuse_get_user_pages(req, &ii, &nbytes, write);
+ int err = fuse_get_user_pages(req, ii, &nbytes, write);
if (err) {
res = err;
break;
@@ -1200,7 +1196,7 @@ ssize_t fuse_direct_io(struct file *file, const struct
iovec *iov,
break;
if (count) {
fuse_put_request(fc, req);
- req = fuse_get_req(fc, fuse_iter_npages(&ii));
+ req = fuse_get_req(fc, fuse_iter_npages(ii));
if (IS_ERR(req))
break;
}
@@ -1214,8 +1210,8 @@ ssize_t fuse_direct_io(struct file *file, const struct
iovec *iov,
}
EXPORT_SYMBOL_GPL(fuse_direct_io);
-static ssize_t __fuse_direct_read(struct file *file, const struct iovec *iov,
- unsigned long nr_segs, loff_t *ppos)
+static ssize_t __fuse_direct_read(struct file *file, struct iov_iter *ii,
+ loff_t *ppos)
{
ssize_t res;
struct inode *inode = file_inode(file);
@@ -1223,8 +1219,7 @@ static ssize_t __fuse_direct_read(struct file *file, const
struct iovec *iov,
if (is_bad_inode(inode))
return -EIO;
- res = fuse_direct_io(file, iov, nr_segs, iov_length(iov, nr_segs),
- ppos, 0);
+ res = fuse_direct_io(file, ii, iov_iter_count(ii), ppos, 0);
fuse_invalidate_attr(inode);
@@ -1235,19 +1230,23 @@ static ssize_t fuse_direct_read(struct file *file, char
__user *buf,
size_t count, loff_t *ppos)
{
struct iovec iov = { .iov_base = buf, .iov_len = count };
- return __fuse_direct_read(file, &iov, 1, ppos);
+ struct iov_iter ii;
+
+ iov_iter_init(&ii, &iov, 1, count, 0);
+
+ return __fuse_direct_read(file, &ii, ppos);
}
-static ssize_t __fuse_direct_write(struct file *file, const struct iovec *iov,
- unsigned long nr_segs, loff_t *ppos)
+static ssize_t __fuse_direct_write(struct file *file, struct iov_iter *ii,
+ loff_t *ppos)
{
struct inode *inode = file_inode(file);
- size_t count = iov_length(iov, nr_segs);
+ size_t count = iov_iter_count(ii);
ssize_t res;
res = generic_write_checks(file, ppos, &count, 0);
if (!res) {
- res = fuse_direct_io(file, iov, nr_segs, count, ppos, 1);
+ res = fuse_direct_io(file, ii, count, ppos, 1);
if (res > 0)
fuse_write_update_size(inode, *ppos);
}
@@ -1261,15 +1260,18 @@ static ssize_t fuse_direct_write(struct file *file,
const char __user *buf,
size_t count, loff_t *ppos)
{
struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = count };
+ struct iov_iter ii;
struct inode *inode = file_inode(file);
ssize_t res;
if (is_bad_inode(inode))
return -EIO;
+ iov_iter_init(&ii, &iov, 1, count, 0);
+
/* Don't allow parallel writes to the same file */
mutex_lock(&inode->i_mutex);
- res = __fuse_direct_write(file, &iov, 1, ppos);
+ res = __fuse_direct_write(file, &ii, ppos);
mutex_unlock(&inode->i_mutex);
return res;
@@ -2219,8 +2221,8 @@ int fuse_notify_poll_wakeup(struct fuse_conn *fc,
}
static ssize_t
-fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs)
+fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *ii,
+ loff_t offset)
{
ssize_t ret = 0;
struct file *file = NULL;
@@ -2230,9 +2232,9 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct
iovec *iov,
pos = offset;
if (rw == WRITE)
- ret = __fuse_direct_write(file, iov, nr_segs, &pos);
+ ret = __fuse_direct_write(file, ii, &pos);
else
- ret = __fuse_direct_read(file, iov, nr_segs, &pos);
+ ret = __fuse_direct_read(file, ii, &pos);
return ret;
}
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 6aeba86..1b5e2cb 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -823,9 +823,8 @@ int fuse_reverse_inval_entry(struct super_block *sb, u64
parent_nodeid,
int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
bool isdir);
-ssize_t fuse_direct_io(struct file *file, const struct iovec *iov,
- unsigned long nr_segs, size_t count, loff_t *ppos,
- int write);
+ssize_t fuse_direct_io(struct file *file, struct iov_iter *ii,
+ size_t count, loff_t *ppos, int write);
long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
unsigned int flags);
long fuse_ioctl_common(struct file *file, unsigned int cmd,
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 371bd14..a17f676 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -994,8 +994,7 @@ static int gfs2_ok_for_dio(struct gfs2_inode *ip, int rw,
loff_t offset)
static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
@@ -1019,8 +1018,8 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
if (rv != 1)
goto out; /* dio not valid, fall back to buffered i/o */
- rv = __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, gfs2_get_block_direct,
+ rv = __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iter,
+ offset, gfs2_get_block_direct,
NULL, NULL, 0);
out:
gfs2_glock_dq(&gh);
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index a9d60d4..a129743 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -125,15 +125,14 @@ static int hfs_releasepage(struct page *page, gfp_t mask)
}
static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset, unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = file_inode(file)->i_mapping->host;
ssize_t ret;
- ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
- hfs_get_block);
+ ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, hfs_get_block);
/*
* In case of error extending write may have instantiated a few
@@ -141,7 +140,7 @@ static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
*/
if (unlikely((rw & WRITE) && ret < 0)) {
loff_t isize = i_size_read(inode);
- loff_t end = offset + iov_length(iov, nr_segs);
+ loff_t end = offset + iov_iter_count(iter);
if (end > isize)
hfs_write_failed(mapping, end);
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index cdd181d..f082b4d 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -122,14 +122,14 @@ static int hfsplus_releasepage(struct page *page, gfp_t
mask)
}
static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset, unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = file_inode(file)->i_mapping->host;
ssize_t ret;
- ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+ ret = blockdev_direct_IO(rw, iocb, inode, iter, offset,
hfsplus_get_block);
/*
@@ -138,7 +138,7 @@ static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
*/
if (unlikely((rw & WRITE) && ret < 0)) {
loff_t isize = i_size_read(inode);
- loff_t end = offset + iov_length(iov, nr_segs);
+ loff_t end = offset + iov_iter_count(iter);
if (end > isize)
hfsplus_write_failed(mapping, end);
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 1781f06..c65977f 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -331,15 +331,14 @@ static sector_t jfs_bmap(struct address_space *mapping,
sector_t block)
}
static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset, unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = file->f_mapping->host;
ssize_t ret;
- ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
- jfs_get_block);
+ ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, jfs_get_block);
/*
* In case of error extending write may have instantiated a few
@@ -347,7 +346,7 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
*/
if (unlikely((rw & WRITE) && ret < 0)) {
loff_t isize = i_size_read(inode);
- loff_t end = offset + iov_length(iov, nr_segs);
+ loff_t end = offset + iov_iter_count(iter);
if (end > isize)
jfs_write_failed(mapping, end);
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 0bd7a55..bceb47e 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -112,7 +112,7 @@ static inline int put_dreq(struct nfs_direct_req *dreq)
* nfs_direct_IO - NFS address space operation for direct I/O
* @rw: direction (read or write)
* @iocb: target I/O control block
- * @iov: array of vectors that define I/O buffer
+ * @iter: array of vectors that define I/O buffer
* @pos: offset in file to begin the operation
* @nr_segs: size of iovec array
*
@@ -121,22 +121,25 @@ static inline int put_dreq(struct nfs_direct_req *dreq)
* shunt off direct read and write requests before the VFS gets them,
* so this method is only ever called for swap.
*/
-ssize_t nfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
loff_t pos, unsigned long nr_segs)
+ssize_t nfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
+ loff_t pos)
{
#ifndef CONFIG_NFS_SWAP
dprintk("NFS: nfs_direct_IO (%s) off/no(%Ld/%lu) EINVAL\n",
iocb->ki_filp->f_path.dentry->d_name.name,
- (long long) pos, nr_segs);
+ (long long) pos, iter->nr_segs);
return -EINVAL;
#else
+ const struct iovec *iov = iov_iter_iovec(iter);
+
VM_BUG_ON(iocb->ki_left != PAGE_SIZE);
VM_BUG_ON(iocb->ki_nbytes != PAGE_SIZE);
if (rw == READ || rw == KERNEL_READ)
- return nfs_file_direct_read(iocb, iov, nr_segs, pos,
+ return nfs_file_direct_read(iocb, iov, iter->nr_segs, pos,
rw == READ ? true : false);
- return nfs_file_direct_write(iocb, iov, nr_segs, pos,
+ return nfs_file_direct_write(iocb, iov, iter->nr_segs, pos,
rw == WRITE ? true : false);
#endif /* CONFIG_NFS_SWAP */
}
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 1e92930..3b5d64d 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -262,8 +262,8 @@ static int nilfs_write_end(struct file *file, struct
address_space *mapping,
}
static ssize_t
-nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs)
+nilfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
+ loff_t offset)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
@@ -274,7 +274,7 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, const struct
iovec *iov,
return 0;
/* Needs synchronization with the cleaner */
- size = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+ size = blockdev_direct_IO(rw, iocb, inode, iter, offset,
nilfs_get_block);
/*
@@ -283,7 +283,7 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, const struct
iovec *iov,
*/
if (unlikely((rw & WRITE) && size < 0)) {
loff_t isize = i_size_read(inode);
- loff_t end = offset + iov_length(iov, nr_segs);
+ loff_t end = offset + iov_iter_count(iter);
if (end > isize)
nilfs_write_failed(mapping, end);
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 20dfec7..6406dd9 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -621,9 +621,8 @@ static int ocfs2_releasepage(struct page *page, gfp_t wait)
static ssize_t ocfs2_direct_IO(int rw,
struct kiocb *iocb,
- const struct iovec *iov,
- loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter,
+ loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file)->i_mapping->host;
@@ -640,8 +639,7 @@ static ssize_t ocfs2_direct_IO(int rw,
return 0;
return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev,
- iov, offset, nr_segs,
- ocfs2_direct_IO_get_blocks,
+ iter, offset, ocfs2_direct_IO_get_blocks,
ocfs2_dio_end_io, NULL, 0);
}
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 77d6d47..dcfd260 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3068,14 +3068,13 @@ static int reiserfs_releasepage(struct page *page, gfp_t
unused_gfp_flags)
/* We thank Mingming Cao for helping us understand in great detail what
to do in this section of the code. */
static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
ssize_t ret;
- ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+ ret = blockdev_direct_IO(rw, iocb, inode, iter, offset,
reiserfs_get_blocks_direct_io);
/*
@@ -3084,7 +3083,7 @@ static ssize_t reiserfs_direct_IO(int rw, struct kiocb
*iocb,
*/
if (unlikely((rw & WRITE) && ret < 0)) {
loff_t isize = i_size_read(inode);
- loff_t end = offset + iov_length(iov, nr_segs);
+ loff_t end = offset + iov_iter_count(iter);
if ((end > isize) && inode_newsize_ok(inode, isize) == 0) {
truncate_setsize(inode, isize);
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 29569dd..339df8b 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -119,8 +119,7 @@ static int udf_adinicb_write_end(struct file *file,
}
static ssize_t udf_adinicb_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov,
- loff_t offset, unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
/* Fallback to buffered I/O. */
return 0;
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index b6d15d3..fad32d5 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -216,19 +216,17 @@ static int udf_write_begin(struct file *file, struct
address_space *mapping,
return ret;
}
-static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov,
- loff_t offset, unsigned long nr_segs)
+static ssize_t udf_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
+ loff_t offset)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
ssize_t ret;
- ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
- udf_get_block);
+ ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, udf_get_block);
if (unlikely(ret < 0 && (rw & WRITE)))
- udf_write_failed(mapping, offset + iov_length(iov, nr_segs));
+ udf_write_failed(mapping, offset + iov_iter_count(iter));
return ret;
}
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index c24ce0e..08e6c93 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1410,9 +1410,8 @@ STATIC ssize_t
xfs_vm_direct_IO(
int rw,
struct kiocb *iocb,
- const struct iovec *iov,
- loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter,
+ loff_t offset)
{
struct inode *inode = iocb->ki_filp->f_mapping->host;
struct block_device *bdev = xfs_find_bdev_for_inode(inode);
@@ -1420,7 +1419,7 @@ xfs_vm_direct_IO(
ssize_t ret;
if (rw & WRITE) {
- size_t size = iov_length(iov, nr_segs);
+ size_t size = iov_iter_count(iter);
/*
* We cannot preallocate a size update transaction here as we
@@ -1432,15 +1431,13 @@ xfs_vm_direct_IO(
if (offset + size > XFS_I(inode)->i_d.di_size)
ioend->io_isdirect = 1;
- ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iov,
- offset, nr_segs,
+ ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iter, offset,
xfs_get_blocks_direct,
xfs_end_io_direct_write, NULL, 0);
if (ret != -EIOCBQUEUED && iocb->private)
goto out_destroy_ioend;
} else {
- ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iov,
- offset, nr_segs,
+ ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iter, offset,
xfs_get_blocks_direct,
NULL, NULL, 0);
}
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 53a1016..e5e881e 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -461,8 +461,8 @@ struct address_space_operations {
void (*invalidatepage) (struct page *, unsigned long);
int (*releasepage) (struct page *, gfp_t);
void (*freepage)(struct page *);
- ssize_t (*direct_IO)(int, struct kiocb *, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs);
+ ssize_t (*direct_IO)(int, struct kiocb *, struct iov_iter *iter,
+ loff_t offset);
int (*get_xip_mem)(struct address_space *, pgoff_t, int,
void **, unsigned long *);
/*
@@ -2544,16 +2544,16 @@ enum {
void dio_end_io(struct bio *bio, int error);
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_block_t get_block, dio_iodone_t end_io,
- dio_submit_t submit_io, int flags);
+ struct block_device *bdev, struct iov_iter *iter, loff_t offset,
+ get_block_t get_block, dio_iodone_t end_io, dio_submit_t submit_io,
+ int flags);
static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
- struct inode *inode, const struct iovec *iov, loff_t offset,
- unsigned long nr_segs, get_block_t get_block)
+ struct inode *inode, struct iov_iter *iter, loff_t offset,
+ get_block_t get_block)
{
- return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, get_block, NULL, NULL,
+ return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iter,
+ offset, get_block, NULL, NULL,
DIO_LOCKING | DIO_SKIP_HOLES);
}
#endif
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 1cc2568..4913e3c 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -444,8 +444,7 @@ extern int nfs3_removexattr (struct dentry *, const char
*name);
/*
* linux/fs/nfs/direct.c
*/
-extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
- unsigned long);
+extern ssize_t nfs_direct_IO(int, struct kiocb *, struct iov_iter *, loff_t);
extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
const struct iovec *iov, unsigned long nr_segs,
loff_t pos, bool uio);
diff --git a/mm/filemap.c b/mm/filemap.c
index 0798e25..28eeb6c 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1414,11 +1414,15 @@ generic_file_aio_read(struct kiocb *iocb, const struct
iovec *iov,
goto out; /* skip atime */
size = i_size_read(inode);
if (pos < size) {
+ size_t bytes = iov_length(iov, nr_segs);
retval = filemap_write_and_wait_range(mapping, pos,
- pos + iov_length(iov, nr_segs) - 1);
+ pos + bytes - 1);
if (!retval) {
+ struct iov_iter iter;
+
+ iov_iter_init(&iter, iov, nr_segs, bytes, 0);
retval = mapping->a_ops->direct_IO(READ, iocb,
- iov, pos, nr_segs);
+ &iter, pos);
}
if (retval > 0) {
*ppos = pos + retval;
@@ -2043,6 +2047,7 @@ generic_file_direct_write(struct kiocb *iocb, const struct
iovec *iov,
ssize_t written;
size_t write_len;
pgoff_t end;
+ struct iov_iter iter;
if (count != ocount)
*nr_segs = iov_shorten((struct iovec *)iov, *nr_segs, count);
@@ -2074,7 +2079,9 @@ generic_file_direct_write(struct kiocb *iocb, const struct
iovec *iov,
}
}
- written = mapping->a_ops->direct_IO(WRITE, iocb, iov, pos, *nr_segs);
+ iov_iter_init(&iter, iov, *nr_segs, write_len, 0);
+
+ written = mapping->a_ops->direct_IO(WRITE, iocb, &iter, pos);
/*
* Finally, try again to invalidate clean pages which might have been
diff --git a/mm/page_io.c b/mm/page_io.c
index c535d39..bfc8d4f 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -209,6 +209,9 @@ int swap_writepage(struct page *page, struct
writeback_control *wbc)
.iov_base = kmap(page),
.iov_len = PAGE_SIZE,
};
+ struct iov_iter iter;
+
+ iov_iter_init(&iter, &iov, 1, PAGE_SIZE, 0);
init_sync_kiocb(&kiocb, swap_file);
kiocb.ki_pos = page_file_offset(page);
@@ -216,9 +219,8 @@ int swap_writepage(struct page *page, struct
writeback_control *wbc)
kiocb.ki_nbytes = PAGE_SIZE;
unlock_page(page);
- ret = mapping->a_ops->direct_IO(KERNEL_WRITE,
- &kiocb, &iov,
- kiocb.ki_pos, 1);
+ ret = mapping->a_ops->direct_IO(KERNEL_WRITE, &kiocb, &iter,
+ kiocb.ki_pos);
kunmap(page);
if (ret == PAGE_SIZE) {
count_vm_event(PSWPOUT);
--
1.8.1.5