Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
---
fs/fuse/dev.c | 4 ++--
fs/pipe.c | 8 +++-----
fs/splice.c | 4 ++--
include/linux/pipe_fs_i.h | 12 +++++++++++-
4 files changed, 18 insertions(+), 10 deletions(-)
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 13be2fddcace..9aa757f283e5 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -728,7 +728,7 @@ static int fuse_copy_fill(struct fuse_copy_state *cs)
struct pipe_buffer *buf = cs->pipebufs;
if (!cs->write) {
- err = buf->ops->confirm(cs->pipe, buf);
+ err = pipe_buf_confirm(cs->pipe, buf);
if (err)
return err;
@@ -828,7 +828,7 @@ static int fuse_try_move_page(struct fuse_copy_state *cs, struct page **pagep)
fuse_copy_finish(cs);
- err = buf->ops->confirm(cs->pipe, buf);
+ err = pipe_buf_confirm(cs->pipe, buf);
if (err)
return err;
diff --git a/fs/pipe.c b/fs/pipe.c
index 67b5f1923835..4fc422f0dea8 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -267,7 +267,6 @@ pipe_read(struct kiocb *iocb, struct iov_iter *to)
if (bufs) {
int curbuf = pipe->curbuf;
struct pipe_buffer *buf = pipe->bufs + curbuf;
- const struct pipe_buf_operations *ops = buf->ops;
size_t chars = buf->len;
size_t written;
int error;
@@ -275,7 +274,7 @@ pipe_read(struct kiocb *iocb, struct iov_iter *to)
if (chars > total_len)
chars = total_len;
- error = ops->confirm(pipe, buf);
+ error = pipe_buf_confirm(pipe, buf);
if (error) {
if (!ret)
ret = error;
@@ -382,11 +381,10 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from)
int lastbuf = (pipe->curbuf + pipe->nrbufs - 1) &
(pipe->buffers - 1);
struct pipe_buffer *buf = pipe->bufs + lastbuf;
- const struct pipe_buf_operations *ops = buf->ops;
int offset = buf->offset + buf->len;
- if (ops->can_merge && offset + chars <= PAGE_SIZE) {
- ret = ops->confirm(pipe, buf);
+ if (buf->ops->can_merge && offset + chars <= PAGE_SIZE) {
+ ret = pipe_buf_confirm(pipe, buf);
if (ret)
goto out;
diff --git a/fs/splice.c b/fs/splice.c
index e4dc45926494..ba7a2240d58c 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -762,7 +762,7 @@ static int splice_from_pipe_feed(struct pipe_inode_info *pipe, struct splice_des
if (sd->len > sd->total_len)
sd->len = sd->total_len;
- ret = buf->ops->confirm(pipe, buf);
+ ret = pipe_buf_confirm(pipe, buf);
if (unlikely(ret)) {
if (ret == -ENODATA)
ret = 0;
@@ -1001,7 +1001,7 @@ iter_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
if (idx == pipe->buffers - 1)
idx = -1;
- ret = buf->ops->confirm(pipe, buf);
+ ret = pipe_buf_confirm(pipe, buf);
if (unlikely(ret)) {
if (ret == -ENODATA)
ret = 0;
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index d24fa6da6ae3..654413334537 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -140,6 +140,17 @@ static inline void pipe_buf_release(struct pipe_inode_info *pipe,
ops->release(pipe, buf);
}
+/**
+ * pipe_buf_confirm - verify contents of the pipe buffer
+ * @pipe: the pipe that the buffer belongs to
+ * @buf: the buffer to confirm
+ */
+static inline int pipe_buf_confirm(struct pipe_inode_info *pipe,
+ struct pipe_buffer *buf)
+{
+ return buf->ops->confirm(pipe, buf);
+}
+
/* Differs from PIPE_BUF in that PIPE_SIZE is the length of the actual
memory allocation, whereas PIPE_BUF makes atomicity guarantees. */
#define PIPE_SIZE PAGE_SIZE
@@ -154,7 +165,6 @@ extern unsigned long pipe_user_pages_hard;
extern unsigned long pipe_user_pages_soft;
int pipe_proc_fn(struct ctl_table *, int, void __user *, size_t *, loff_t *);
-
/* Drop the inode semaphore and wait for a pipe event, atomically */
void pipe_wait(struct pipe_inode_info *pipe);
--
2.5.5
--
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