switch {__,}blockdev_direct_IO() to iov_iter

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

19 files changed, 49 insertions, 60 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 938fc707d769..937e3011ed58 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -171,8 +171,8 @@ blkdev_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
         struct file *file = iocb->ki_filp;
         struct inode *inode = file->f_mapping->host;
 
-        return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iter->iov,
-                                    offset, iter->nr_segs, blkdev_get_block,
+        return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iter,
+                                    offset, blkdev_get_block,
                                     NULL, NULL, 0);
 }
 
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index c46a025d0c4b..b0b8fa0efba3 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7483,8 +7483,7 @@ 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,
-                        iter->iov, offset, iter->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/direct-io.c b/fs/direct-io.c
index 31ba0935e32e..1c677899b989 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1107,8 +1107,8 @@ 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,
+        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;
@@ -1143,9 +1143,9 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
         }
 
         /* 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;
+        for (seg = 0; seg < iter->nr_segs; seg++) {
+                addr = (unsigned long)iter->iov[seg].iov_base;
+                size = iter->iov[seg].iov_len;
                 end += size;
                 if (unlikely((addr & blocksize_mask) ||
                              (size & blocksize_mask))) {
@@ -1256,18 +1256,18 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
         if (unlikely(sdio.blkfactor))
                 sdio.pages_in_io = 2;
 
-        for (seg = 0; seg < nr_segs; seg++) {
-                user_addr = (unsigned long)iov[seg].iov_base;
+        for (seg = 0; seg < iter->nr_segs; seg++) {
+                user_addr = (unsigned long)iter->iov[seg].iov_base;
                 sdio.pages_in_io +=
-                        ((user_addr + iov[seg].iov_len + PAGE_SIZE-1) /
+                        ((user_addr + iter->iov[seg].iov_len + PAGE_SIZE-1) /
                                 PAGE_SIZE - user_addr / PAGE_SIZE);
         }
 
         blk_start_plug(&plug);
 
-        for (seg = 0; seg < nr_segs; seg++) {
-                user_addr = (unsigned long)iov[seg].iov_base;
-                sdio.size += bytes = iov[seg].iov_len;
+        for (seg = 0; seg < iter->nr_segs; seg++) {
+                user_addr = (unsigned long)iter->iov[seg].iov_base;
+                sdio.size += bytes = iter->iov[seg].iov_len;
 
                 /* Index into the first page of the first block */
                 sdio.first_block_in_page = (user_addr & ~PAGE_MASK) >> blkbits;
@@ -1288,7 +1288,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 
                 retval = do_direct_IO(dio, &sdio, &map_bh);
 
-                dio->result += iov[seg].iov_len -
+                dio->result += iter->iov[seg].iov_len -
                         ((sdio.final_block_in_request - sdio.block_in_file) <<
                                         blkbits);
 
@@ -1365,8 +1365,8 @@ 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,
+        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)
 {
         /*
@@ -1381,9 +1381,8 @@ __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 116e809aa7cb..36d35c36311d 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -859,8 +859,7 @@ ext2_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
         size_t count = iov_iter_count(iter);
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-                                 iter->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 + count);
         return ret;
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 8582ae2c80b0..4d32133a76c4 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1855,8 +1855,7 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
         }
 
 retry:
-        ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-                                 iter->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.
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 123898a6af05..8a57e9fcd1b9 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -686,14 +686,13 @@ retry:
                         goto locked;
                 }
                 ret = __blockdev_direct_IO(rw, iocb, inode,
-                                 inode->i_sb->s_bdev, iter->iov,
-                                 offset, iter->nr_segs,
+                                 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, iter->iov,
-                                 offset, iter->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);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 2b993579a968..e5718385a037 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3166,8 +3166,8 @@ 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, iter->iov,
-                                   offset, iter->nr_segs,
+                                   inode->i_sb->s_bdev, iter,
+                                   offset,
                                    get_block_func,
                                    ext4_end_io_dio,
                                    NULL,
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 3a6ef121c095..151488f27755 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1022,8 +1022,8 @@ static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
         if (check_direct_IO(inode, rw, iter->iov, offset, iter->nr_segs))
                 return 0;
 
-        return blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-                                  iter->nr_segs, get_data_block);
+        return blockdev_direct_IO(rw, iocb, inode, iter, offset,
+                                  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 154a6f9d3189..385cce464e82 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -213,8 +213,7 @@ 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, iter->iov, offset,
-                                 iter->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 + count);
 
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 228a12d2afa9..910838951d66 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -1097,7 +1097,7 @@ static ssize_t gfs2_direct_IO(int rw, struct kiocb *iocb,
         }
 
         rv = __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev,
-                                  iter->iov, offset, iter->nr_segs,
+                                  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 dc69e8f31581..f5fb09ebc850 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -133,8 +133,7 @@ static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
         size_t count = iov_iter_count(iter);
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-                                 iter->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
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index e6b1251af47a..76b930ff58ae 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -131,7 +131,7 @@ static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
         size_t count = iov_iter_count(iter);
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset, iter->nr_segs,
+        ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, 
                                  hfsplus_get_block);
 
         /*
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 6cde5928693b..bd3df1ca3c9b 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -339,8 +339,7 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
         size_t count = iov_iter_count(iter);
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-                                 iter->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
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 7aaf913e8709..6252b173a465 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -311,8 +311,8 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
                 return 0;
 
         /* Needs synchronization with the cleaner */
-        size = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-                                  iter->nr_segs, nilfs_get_block);
+        size = blockdev_direct_IO(rw, iocb, inode, iter, offset,
+                                  nilfs_get_block);
 
         /*
          * In case of error extending write may have instantiated a few
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 799fd0afcb35..4a231a166cf8 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -617,7 +617,7 @@ static ssize_t ocfs2_direct_IO(int rw,
                 return 0;
 
         return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev,
-                                    iter->iov, offset, iter->nr_segs,
+                                    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 723affe921f1..b8003e8dd1f4 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3090,8 +3090,8 @@ static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
         size_t count = iov_iter_count(iter);
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset,
-                                 iter->nr_segs, reiserfs_get_blocks_direct_io);
+        ret = blockdev_direct_IO(rw, iocb, inode, iter, offset,
+                                 reiserfs_get_blocks_direct_io);
 
         /*
          * In case of error extending write may have instantiated a few
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 28984baf6194..236cd48184c2 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -226,8 +226,7 @@ static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
         size_t count = iov_iter_count(iter);
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset, iter->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 + count);
         return ret;
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 6462b3186784..08d13e395252 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -1470,17 +1470,15 @@ 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, iter->iov,
-                                            offset, iter->nr_segs,
-                                            xfs_get_blocks_direct,
+                ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iter,
+                                            offset, 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, iter->iov,
-                                            offset, iter->nr_segs,
-                                            xfs_get_blocks_direct,
+                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 399a338c92b5..946a9484844f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2474,16 +2474,16 @@ 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,
+        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