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Commit cac36bb0 authored by Jens Axboe's avatar Jens Axboe
Browse files

pipe: change the ->pin() operation to ->confirm() 



The name 'pin' was badly chosen, it doesn't pin a pipe buffer
in the most commonly used sense in the kernel. So change the
name to 'confirm', after debating this issue with Hugh
Dickins a bit.

A good return from ->confirm() means that the buffer is really
there, and that the contents are good.

Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent d96e6e71

drivers/block/loop.c

+1 −1
Original line number Diff line number Diff line
@@ -412,7 +412,7 @@ lo_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf, 
	size_t size;

	int ret;



	ret = buf->ops->pin(pipe, buf);

	ret = buf->ops->confirm(pipe, buf);

	if (unlikely(ret))

		return ret;

fs/nfsd/vfs.c

+1 −1
Original line number Diff line number Diff line
@@ -815,7 +815,7 @@ nfsd_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf, 
	size_t size;

	int ret;



	ret = buf->ops->pin(pipe, buf);

	ret = buf->ops->confirm(pipe, buf);

	if (unlikely(ret))

		return ret;

fs/ocfs2/file.c

+2 −2
Original line number Diff line number Diff line
@@ -1583,7 +1583,7 @@ static int ocfs2_splice_write_actor(struct pipe_inode_info *pipe, 
	ssize_t copied = 0;

	struct ocfs2_splice_write_priv sp;



	ret = buf->ops->pin(pipe, buf);

	ret = buf->ops->confirm(pipe, buf);

	if (ret)

		goto out;
@@ -1604,7 +1604,7 @@ static int ocfs2_splice_write_actor(struct pipe_inode_info *pipe, 
		 * might enter ocfs2_buffered_write_cluster() more

		 * than once, so keep track of our progress here.

		 */

		copied = ocfs2_buffered_write_cluster(sd->file,

		copied = ocfs2_buffered_write_cluster(sd->u.file,

						      (loff_t)sd->pos + total,

						      count,

						      ocfs2_map_and_write_splice_data,

fs/pipe.c

+5 −4
Original line number Diff line number Diff line
@@ -203,7 +203,8 @@ void generic_pipe_buf_get(struct pipe_inode_info *info, struct pipe_buffer *buf) 
	page_cache_get(buf->page);

}



int generic_pipe_buf_pin(struct pipe_inode_info *info, struct pipe_buffer *buf)

int generic_pipe_buf_confirm(struct pipe_inode_info *info,

			     struct pipe_buffer *buf)

{

	return 0;

}
@@ -212,7 +213,7 @@ static const struct pipe_buf_operations anon_pipe_buf_ops = { 
	.can_merge = 1,

	.map = generic_pipe_buf_map,

	.unmap = generic_pipe_buf_unmap,

	.pin = generic_pipe_buf_pin,

	.confirm = generic_pipe_buf_confirm,

	.release = anon_pipe_buf_release,

	.steal = generic_pipe_buf_steal,

	.get = generic_pipe_buf_get,
@@ -252,7 +253,7 @@ pipe_read(struct kiocb *iocb, const struct iovec *_iov, 
			if (chars > total_len)

				chars = total_len;



			error = ops->pin(pipe, buf);

			error = ops->confirm(pipe, buf);

			if (error) {

				if (!ret)

					error = ret;
@@ -373,7 +374,7 @@ pipe_write(struct kiocb *iocb, const struct iovec *_iov, 
			int error, atomic = 1;

			void *addr;



			error = ops->pin(pipe, buf);

			error = ops->confirm(pipe, buf);

			if (error)

				goto out;

fs/splice.c

+7 −7
Original line number Diff line number Diff line
@@ -85,7 +85,7 @@ static void page_cache_pipe_buf_release(struct pipe_inode_info *pipe, 
	buf->flags &= ~PIPE_BUF_FLAG_LRU;

}



static int page_cache_pipe_buf_pin(struct pipe_inode_info *pipe,

static int page_cache_pipe_buf_confirm(struct pipe_inode_info *pipe,

				       struct pipe_buffer *buf)

{

	struct page *page = buf->page;
@@ -127,7 +127,7 @@ static const struct pipe_buf_operations page_cache_pipe_buf_ops = { 
	.can_merge = 0,

	.map = generic_pipe_buf_map,

	.unmap = generic_pipe_buf_unmap,

	.pin = page_cache_pipe_buf_pin,

	.confirm = page_cache_pipe_buf_confirm,

	.release = page_cache_pipe_buf_release,

	.steal = page_cache_pipe_buf_steal,

	.get = generic_pipe_buf_get,
@@ -147,7 +147,7 @@ static const struct pipe_buf_operations user_page_pipe_buf_ops = { 
	.can_merge = 0,

	.map = generic_pipe_buf_map,

	.unmap = generic_pipe_buf_unmap,

	.pin = generic_pipe_buf_pin,

	.confirm = generic_pipe_buf_confirm,

	.release = page_cache_pipe_buf_release,

	.steal = user_page_pipe_buf_steal,

	.get = generic_pipe_buf_get,
@@ -525,7 +525,7 @@ static int pipe_to_sendpage(struct pipe_inode_info *pipe, 
	loff_t pos = sd->pos;

	int ret, more;



	ret = buf->ops->pin(pipe, buf);

	ret = buf->ops->confirm(pipe, buf);

	if (!ret) {

		more = (sd->flags & SPLICE_F_MORE) || sd->len < sd->total_len;
@@ -569,7 +569,7 @@ static int pipe_to_file(struct pipe_inode_info *pipe, struct pipe_buffer *buf, 
	/*

	 * make sure the data in this buffer is uptodate

	 */

	ret = buf->ops->pin(pipe, buf);

	ret = buf->ops->confirm(pipe, buf);

	if (unlikely(ret))

		return ret;
@@ -1341,7 +1341,7 @@ static int pipe_to_user(struct pipe_inode_info *pipe, struct pipe_buffer *buf, 
	char *src;

	int ret;



	ret = buf->ops->pin(pipe, buf);

	ret = buf->ops->confirm(pipe, buf);

	if (unlikely(ret))

		return ret;