Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs updates from Al Viro:
 "This the bunch that sat in -next + lock_parent() fix.  This is the
  minimal set; there's more pending stuff.

  In particular, I really hope to get acct.c fixes merged this cycle -
  we need that to deal sanely with delayed-mntput stuff.  In the next
  pile, hopefully - that series is fairly short and localized
  (kernel/acct.c, fs/super.c and fs/namespace.c).  In this pile: more
  iov_iter work.  Most of prereqs for ->splice_write with sane locking
  order are there and Kent's dio rewrite would also fit nicely on top of
  this pile"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (70 commits)
  lock_parent: don't step on stale ->d_parent of all-but-freed one
  kill generic_file_splice_write()
  ceph: switch to iter_file_splice_write()
  shmem: switch to iter_file_splice_write()
  nfs: switch to iter_splice_write_file()
  fs/splice.c: remove unneeded exports
  ocfs2: switch to iter_file_splice_write()
  ->splice_write() via ->write_iter()
  bio_vec-backed iov_iter
  optimize copy_page_{to,from}_iter()
  bury generic_file_aio_{read,write}
  lustre: get rid of messing with iovecs
  ceph: switch to ->write_iter()
  ceph_sync_direct_write: stop poking into iov_iter guts
  ceph_sync_read: stop poking into iov_iter guts
  new helper: copy_page_from_iter()
  fuse: switch to ->write_iter()
  btrfs: switch to ->write_iter()
  ocfs2: switch to ->write_iter()
  xfs: switch to ->write_iter()
  ...

1 files changed, 17 insertions, 48 deletions

diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index c1edf73..4042ff5 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -165,22 +165,21 @@ nfs_file_flush(struct file *file, fl_owner_t id)
 EXPORT_SYMBOL_GPL(nfs_file_flush);
 
 ssize_t
-nfs_file_read(struct kiocb *iocb, const struct iovec *iov,
-		unsigned long nr_segs, loff_t pos)
+nfs_file_read(struct kiocb *iocb, struct iov_iter *to)
 {
 	struct inode *inode = file_inode(iocb->ki_filp);
 	ssize_t result;
 
 	if (iocb->ki_filp->f_flags & O_DIRECT)
-		return nfs_file_direct_read(iocb, iov, nr_segs, pos, true);
+		return nfs_file_direct_read(iocb, to, iocb->ki_pos, true);
 
-	dprintk("NFS: read(%pD2, %lu@%lu)\n",
+	dprintk("NFS: read(%pD2, %zu@%lu)\n",
 		iocb->ki_filp,
-		(unsigned long) iov_length(iov, nr_segs), (unsigned long) pos);
+		iov_iter_count(to), (unsigned long) iocb->ki_pos);
 
 	result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping);
 	if (!result) {
-		result = generic_file_aio_read(iocb, iov, nr_segs, pos);
+		result = generic_file_read_iter(iocb, to);
 		if (result > 0)
 			nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, result);
 	}
@@ -635,24 +634,24 @@ static int nfs_need_sync_write(struct file *filp, struct inode *inode)
 	return 0;
 }
 
-ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
-		       unsigned long nr_segs, loff_t pos)
+ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file_inode(file);
 	unsigned long written = 0;
 	ssize_t result;
-	size_t count = iov_length(iov, nr_segs);
+	size_t count = iov_iter_count(from);
+	loff_t pos = iocb->ki_pos;
 
 	result = nfs_key_timeout_notify(file, inode);
 	if (result)
 		return result;
 
 	if (file->f_flags & O_DIRECT)
-		return nfs_file_direct_write(iocb, iov, nr_segs, pos, true);
+		return nfs_file_direct_write(iocb, from, pos, true);
 
-	dprintk("NFS: write(%pD2, %lu@%Ld)\n",
-		file, (unsigned long) count, (long long) pos);
+	dprintk("NFS: write(%pD2, %zu@%Ld)\n",
+		file, count, (long long) pos);
 
 	result = -EBUSY;
 	if (IS_SWAPFILE(inode))
@@ -670,7 +669,7 @@ ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
 	if (!count)
 		goto out;
 
-	result = generic_file_aio_write(iocb, iov, nr_segs, pos);
+	result = generic_file_write_iter(iocb, from);
 	if (result > 0)
 		written = result;
 
@@ -691,36 +690,6 @@ out_swapfile:
 }
 EXPORT_SYMBOL_GPL(nfs_file_write);
 
-ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
-			      struct file *filp, loff_t *ppos,
-			      size_t count, unsigned int flags)
-{
-	struct inode *inode = file_inode(filp);
-	unsigned long written = 0;
-	ssize_t ret;
-
-	dprintk("NFS splice_write(%pD2, %lu@%llu)\n",
-		filp, (unsigned long) count, (unsigned long long) *ppos);
-
-	/*
-	 * The combination of splice and an O_APPEND destination is disallowed.
-	 */
-
-	ret = generic_file_splice_write(pipe, filp, ppos, count, flags);
-	if (ret > 0)
-		written = ret;
-
-	if (ret >= 0 && nfs_need_sync_write(filp, inode)) {
-		int err = vfs_fsync(filp, 0);
-		if (err < 0)
-			ret = err;
-	}
-	if (ret > 0)
-		nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(nfs_file_splice_write);
-
 static int
 do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
 {
@@ -935,10 +904,10 @@ EXPORT_SYMBOL_GPL(nfs_setlease);
 
 const struct file_operations nfs_file_operations = {
 	.llseek		= nfs_file_llseek,
-	.read		= do_sync_read,
-	.write		= do_sync_write,
-	.aio_read	= nfs_file_read,
-	.aio_write	= nfs_file_write,
+	.read		= new_sync_read,
+	.write		= new_sync_write,
+	.read_iter	= nfs_file_read,
+	.write_iter	= nfs_file_write,
 	.mmap		= nfs_file_mmap,
 	.open		= nfs_file_open,
 	.flush		= nfs_file_flush,
@@ -947,7 +916,7 @@ const struct file_operations nfs_file_operations = {
 	.lock		= nfs_lock,
 	.flock		= nfs_flock,
 	.splice_read	= nfs_file_splice_read,
-	.splice_write	= nfs_file_splice_write,
+	.splice_write	= iter_file_splice_write,
 	.check_flags	= nfs_check_flags,
 	.setlease	= nfs_setlease,
 };