pass iov_iter to ->direct_IO()

unmodified, for now

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index eba7901..9b0d5a3 100644 (file)
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -196,8 +196,7 @@ prototypes:
        void (*invalidatepage) (struct page *, unsigned int, unsigned int);
        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 617f6d7..1846374 100644 (file)
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -589,8 +589,7 @@ struct address_space_operations {
        void (*invalidatepage) (struct page *, unsigned int, unsigned int);
        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/drivers/staging/lustre/lustre/llite/rw26.c b/drivers/staging/lustre/lustre/llite/rw26.c
index 7e3e096..66e05c6 100644 (file)
--- a/drivers/staging/lustre/lustre/llite/rw26.c
+++ b/drivers/staging/lustre/lustre/llite/rw26.c
@@ -363,15 +363,14 @@ static ssize_t ll_direct_IO_26_seg(const struct lu_env *env, struct cl_io *io,
 #define MAX_DIO_SIZE ((MAX_MALLOC / sizeof(struct brw_page) * PAGE_CACHE_SIZE) & \
                      ~(DT_MAX_BRW_SIZE - 1))
 static ssize_t ll_direct_IO_26(int rw, struct kiocb *iocb,
-                              const struct iovec *iov, loff_t file_offset,
-                              unsigned long nr_segs)
+                              struct iov_iter *iter, loff_t file_offset)
 {
        struct lu_env *env;
        struct cl_io *io;
        struct file *file = iocb->ki_filp;
        struct inode *inode = file->f_mapping->host;
        struct ccc_object *obj = cl_inode2ccc(inode);
-       long count = iov_length(iov, nr_segs);
+       long count = iov_length(iter->iov, iter->nr_segs);
        long tot_bytes = 0, result = 0;
        struct ll_inode_info *lli = ll_i2info(inode);
        unsigned long seg = 0;
@@ -392,9 +391,9 @@ static ssize_t ll_direct_IO_26(int rw, struct kiocb *iocb,
               MAX_DIO_SIZE >> PAGE_CACHE_SHIFT);
 
        /* Check that all user buffers are aligned as well */
-       for (seg = 0; seg < nr_segs; seg++) {
-               if (((unsigned long)iov[seg].iov_base & ~CFS_PAGE_MASK) ||
-                   (iov[seg].iov_len & ~CFS_PAGE_MASK))
+       for (seg = 0; seg < iter->nr_segs; seg++) {
+               if (((unsigned long)iter->iov[seg].iov_base & ~CFS_PAGE_MASK) ||
+                   (iter->iov[seg].iov_len & ~CFS_PAGE_MASK))
                        return -EINVAL;
        }
 
@@ -411,9 +410,9 @@ static ssize_t ll_direct_IO_26(int rw, struct kiocb *iocb,
                mutex_lock(&inode->i_mutex);
 
        LASSERT(obj->cob_transient_pages == 0);
-       for (seg = 0; seg < nr_segs; seg++) {
-               long iov_left = iov[seg].iov_len;
-               unsigned long user_addr = (unsigned long)iov[seg].iov_base;
+       for (seg = 0; seg < iter->nr_segs; seg++) {
+               long iov_left = iter->iov[seg].iov_len;
+               unsigned long user_addr = (unsigned long)iter->iov[seg].iov_base;
 
                if (rw == READ) {
                        if (file_offset >= i_size_read(inode))

diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index c71e886..cc1cfae 100644 (file)
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -259,8 +259,7 @@ 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
@@ -269,7 +268,7 @@ 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 552a8d1..938fc70 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -165,14 +165,15 @@ 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->iov,
+                                   offset, iter->nr_segs, 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 5f805bc..30a6cc5 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7433,8 +7433,7 @@ out:
 }
 
 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;
@@ -7444,8 +7443,8 @@ 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->iov,
+                           offset, iter->nr_segs))
                return 0;
 
        atomic_inc(&inode->i_dio_count);
@@ -7457,7 +7456,7 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
         * we need to flush the dirty pages again to make absolutely sure
         * that any outstanding dirty pages are on disk.
         */
-       count = iov_length(iov, nr_segs);
+       count = iov_length(iter->iov, iter->nr_segs);
        if (test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT,
                     &BTRFS_I(inode)->runtime_flags))
                filemap_fdatawrite_range(inode->i_mapping, offset, count);
@@ -7484,7 +7483,8 @@ 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->iov, offset, iter->nr_segs,
+                       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 b53278c..342ca5e 100644 (file)
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1187,8 +1187,8 @@ 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/cifs/file.c b/fs/cifs/file.c
index 2900d15..a4ccc39 100644 (file)
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -3702,8 +3702,8 @@ void cifs_oplock_break(struct work_struct *work)
  * Direct IO is not yet supported in the cached mode. 
  */
 static ssize_t
-cifs_direct_io(int rw, struct kiocb *iocb, const struct iovec *iov,
-               loff_t pos, unsigned long nr_segs)
+cifs_direct_io(int rw, struct kiocb *iocb, struct iov_iter *iter,
+               loff_t pos)
 {
         /*
          * FIXME

diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index d1c244d..3f9cafd 100644 (file)
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -964,7 +964,7 @@ static void exofs_invalidatepage(struct page *page, unsigned int offset,
 
  /* TODO: Should be easy enough to do proprly */
 static ssize_t exofs_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)
 {
        return 0;
 }

diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index b1d2a46..47fbe76 100644 (file)
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -850,18 +850,19 @@ 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->iov, offset,
+                                iter->nr_segs, ext2_get_block);
        if (ret < 0 && (rw & WRITE))
-               ext2_write_failed(mapping, offset + iov_length(iov, nr_segs));
+               ext2_write_failed(mapping, offset +
+                                 iov_length(iter->iov, iter->nr_segs));
        return ret;
 }
 

diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index f5157d0..7a5c501 100644 (file)
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1820,8 +1820,7 @@ 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;
@@ -1829,10 +1828,10 @@ 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_length(iter->iov, iter->nr_segs);
        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;
@@ -1856,15 +1855,15 @@ 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->iov, offset,
+                                iter->nr_segs, 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);
@@ -1909,8 +1908,7 @@ 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/inode.c b/fs/ext4/inode.c
index d7b7462..f51db73 100644 (file)
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3222,8 +3222,7 @@ 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;
@@ -3239,13 +3238,13 @@ 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_length(iter->iov, iter->nr_segs), 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->iov, offset, iter->nr_segs);
        else
-               ret = ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
+               ret = ext4_ind_direct_IO(rw, iocb, iter->iov, offset, iter->nr_segs);
        trace_ext4_direct_IO_exit(inode, offset,
-                               iov_length(iov, nr_segs), rw, ret);
+                               iov_length(iter->iov, iter->nr_segs), rw, ret);
        return ret;
 }
 

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 45abd60..3a6ef12 100644 (file)
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1010,7 +1010,7 @@ static int check_direct_IO(struct inode *inode, int rw,
 }
 
 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;
@@ -1019,11 +1019,11 @@ static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
        if (f2fs_has_inline_data(inode))
                return 0;
 
-       if (check_direct_IO(inode, rw, iov, offset, nr_segs))
+       if (check_direct_IO(inode, rw, iter->iov, offset, iter->nr_segs))
                return 0;
 
-       return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
-                                                       get_data_block);
+       return blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
+                                 iter->nr_segs, get_data_block);
 }
 
 static void f2fs_invalidate_data_page(struct page *page, unsigned int offset,

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index b3361fe..d5237a1 100644 (file)
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -185,8 +185,8 @@ 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;
@@ -203,7 +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_length(iter->iov, iter->nr_segs);
                if (MSDOS_I(inode)->mmu_private < size)
                        return 0;
        }
@@ -212,10 +212,11 @@ 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->iov, offset,
+                                iter->nr_segs, fat_get_block);
        if (ret < 0 && (rw & WRITE))
-               fat_write_failed(mapping, offset + iov_length(iov, nr_segs));
+               fat_write_failed(mapping, offset +
+                                iov_length(iter->iov, iter->nr_segs));
 
        return ret;
 }

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 9c7f346..17d96f3 100644 (file)
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -2890,8 +2890,8 @@ static inline loff_t fuse_round_up(loff_t off)
 }
 
 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 *iter,
+                       loff_t offset)
 {
        ssize_t ret = 0;
        struct file *file = iocb->ki_filp;
@@ -2900,7 +2900,7 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
        loff_t pos = 0;
        struct inode *inode;
        loff_t i_size;
-       size_t count = iov_length(iov, nr_segs);
+       size_t count = iov_length(iter->iov, iter->nr_segs);
        struct fuse_io_priv *io;
 
        pos = offset;
@@ -2944,9 +2944,9 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
                io->async = false;
 
        if (rw == WRITE)
-               ret = __fuse_direct_write(io, iov, nr_segs, &pos);
+               ret = __fuse_direct_write(io, iter->iov, iter->nr_segs, &pos);
        else
-               ret = __fuse_direct_read(io, iov, nr_segs, &pos, count);
+               ret = __fuse_direct_read(io, iter->iov, iter->nr_segs, &pos, count);
 
        if (io->async) {
                fuse_aio_complete(io, ret < 0 ? ret : 0, -1);

diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index ce62dca..e84ddaa 100644 (file)
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -1041,8 +1041,7 @@ 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;
@@ -1082,7 +1081,7 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
         */
        if (mapping->nrpages) {
                loff_t lstart = offset & (PAGE_CACHE_SIZE - 1);
-               loff_t len = iov_length(iov, nr_segs);
+               loff_t len = iov_length(iter->iov, iter->nr_segs);
                loff_t end = PAGE_ALIGN(offset + len) - 1;
 
                rv = 0;
@@ -1097,9 +1096,9 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
                        truncate_inode_pages_range(mapping, lstart, end);
        }
 
-       rv = __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
-                                 offset, nr_segs, gfs2_get_block_direct,
-                                 NULL, NULL, 0);
+       rv = __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev,
+                                 iter->iov, offset, iter->nr_segs,
+                                 gfs2_get_block_direct, NULL, NULL, 0);
 out:
        gfs2_glock_dq(&gh);
        gfs2_holder_uninit(&gh);

diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 9e2fecd..09cff13 100644 (file)
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -125,15 +125,15 @@ 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->iov, offset,
+                                iter->nr_segs, hfs_get_block);
 
        /*
         * In case of error extending write may have instantiated a few
@@ -141,7 +141,7 @@ 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_length(iter->iov, iter->nr_segs);
 
                if (end > isize)
                        hfs_write_failed(mapping, end);

diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index a4f45bd..7f894a5 100644 (file)
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -123,14 +123,14 @@ 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->iov, offset, iter->nr_segs,
                                 hfsplus_get_block);
 
        /*
@@ -139,7 +139,7 @@ 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_length(iter->iov, iter->nr_segs);
 
                if (end > isize)
                        hfsplus_write_failed(mapping, end);

diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 6f8fe72..7052744 100644 (file)
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -331,15 +331,15 @@ 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->iov, offset,
+                                iter->nr_segs, jfs_get_block);
 
        /*
         * In case of error extending write may have instantiated a few
@@ -347,7 +347,7 @@ 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_length(iter->iov, iter->nr_segs);
 
                if (end > isize)
                        jfs_write_failed(mapping, end);

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index b8797ae..e9cde39 100644 (file)
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -121,20 +121,20 @@ 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 (%pD) off/no(%Ld/%lu) EINVAL\n",
-                       iocb->ki_filp, (long long) pos, nr_segs);
+                       iocb->ki_filp, (long long) pos, iter->nr_segs);
 
        return -EINVAL;
 #else
        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, iter->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, iter->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 b9c5726..1c0e8fe 100644 (file)
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -298,8 +298,8 @@ 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;
@@ -310,8 +310,8 @@ 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,
-                                 nilfs_get_block);
+       size = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
+                                 iter->nr_segs, nilfs_get_block);
 
        /*
         * In case of error extending write may have instantiated a few
@@ -319,7 +319,7 @@ 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_length(iter->iov, iter->nr_segs);
 
                if (end > isize)
                        nilfs_write_failed(mapping, end);

diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index d310d12..799fd0a 100644 (file)
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -599,9 +599,8 @@ 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;
@@ -618,7 +617,7 @@ 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,
+                                   iter->iov, offset, iter->nr_segs,
                                    ocfs2_direct_IO_get_blocks,
                                    ocfs2_dio_end_io, NULL, 0);
 }

diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index bc8b800..17bf4c4 100644 (file)
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3083,15 +3083,14 @@ 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,
-                                 reiserfs_get_blocks_direct_io);
+       ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
+                                iter->nr_segs, reiserfs_get_blocks_direct_io);
 
        /*
         * In case of error extending write may have instantiated a few
@@ -3099,7 +3098,7 @@ 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_length(iter->iov, iter->nr_segs);
 
                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 d2c170f..ade8864 100644 (file)
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -119,8 +119,8 @@ 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 5d64370..5b184c7 100644 (file)
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -217,18 +217,18 @@ static int udf_write_begin(struct file *file, struct address_space *mapping,
 }
 
 static ssize_t udf_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 = mapping->host;
        ssize_t ret;
 
-       ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+       ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset, iter->nr_segs,
                                  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_length(iter->iov, iter->nr_segs));
        return ret;
 }
 

diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 0479c32..330d7b1 100644 (file)
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1449,9 +1449,8 @@ 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);
@@ -1459,7 +1458,7 @@ xfs_vm_direct_IO(
        ssize_t                 ret;
 
        if (rw & WRITE) {
-               size_t size = iov_length(iov, nr_segs);
+               size_t size = iov_length(iter->iov, iter->nr_segs);
 
                /*
                 * We cannot preallocate a size update transaction here as we
@@ -1471,16 +1470,16 @@ 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->iov,
+                                           offset, iter->nr_segs,
                                            xfs_get_blocks_direct,
                                            xfs_end_io_direct_write, NULL,
                                            DIO_ASYNC_EXTEND);
                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->iov,
+                                           offset, iter->nr_segs,
                                            xfs_get_blocks_direct,
                                            NULL, NULL, 0);
        }

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 796de74..399a338 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -343,8 +343,7 @@ struct address_space_operations {
        void (*invalidatepage) (struct page *, unsigned int, unsigned int);
        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 *);
        /*

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index fa6918b..5a0d78e 100644 (file)
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -459,8 +459,7 @@ 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 7c1417b..1396412 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1699,10 +1699,9 @@ generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov,
                size = i_size_read(inode);
                retval = filemap_write_and_wait_range(mapping, pos,
                                        pos + iov_length(iov, nr_segs) - 1);
-               if (!retval) {
-                       retval = mapping->a_ops->direct_IO(READ, iocb,
-                                                          iov, pos, nr_segs);
-               }
+               if (!retval)
+                       retval = mapping->a_ops->direct_IO(READ, iocb, &i, pos);
+
                if (retval > 0) {
                        *ppos = pos + retval;
                        count -= retval;
@@ -2383,7 +2382,7 @@ generic_file_direct_write(struct kiocb *iocb, struct iov_iter *from,
                }
        }
 
-       written = mapping->a_ops->direct_IO(WRITE, iocb, from->iov, pos, from->nr_segs);
+       written = mapping->a_ops->direct_IO(WRITE, iocb, from, 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 7c59ef6..0ed0644 100644 (file)
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -263,16 +263,18 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
                        .iov_base = kmap(page),
                        .iov_len  = PAGE_SIZE,
                };
+               struct iov_iter from;
 
                init_sync_kiocb(&kiocb, swap_file);
                kiocb.ki_pos = page_file_offset(page);
                kiocb.ki_nbytes = PAGE_SIZE;
+               iov_iter_init(&from, &iov, 1, PAGE_SIZE, 0);
 
                set_page_writeback(page);
                unlock_page(page);
                ret = mapping->a_ops->direct_IO(KERNEL_WRITE,
-                                               &kiocb, &iov,
-                                               kiocb.ki_pos, 1);
+                                               &kiocb, &from,
+                                               kiocb.ki_pos);
                kunmap(page);
                if (ret == PAGE_SIZE) {
                        count_vm_event(PSWPOUT);