author: Al Viro <viro@zeniv.linux.org.uk> 2021-01-25 22:24:28 -0500
committer: Al Viro <viro@zeniv.linux.org.uk> 2021-01-25 23:29:36 -0500
commit: b964bf53e540262f2d12672b3cca10842c0172e7
parent: faa97c48c33454ac0107db930a491b692dd1dff1
Commit Summary:
Diffstat:
1 file changed, 13 insertions, 6 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index 75f764b43418..9db7adf160d2 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1188,6 +1188,7 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
{
struct fd in, out;
struct inode *in_inode, *out_inode;
+ struct pipe_inode_info *opipe;
loff_t pos;
loff_t out_pos;
ssize_t retval;
@@ -1228,9 +1229,6 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
in_inode = file_inode(in.file);
out_inode = file_inode(out.file);
out_pos = out.file->f_pos;
- retval = rw_verify_area(WRITE, out.file, &out_pos, count);
- if (retval < 0)
- goto fput_out;
if (!max)
max = min(in_inode->i_sb->s_maxbytes, out_inode->i_sb->s_maxbytes);
@@ -1253,9 +1251,18 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
if (in.file->f_flags & O_NONBLOCK)
fl = SPLICE_F_NONBLOCK;
#endif
- file_start_write(out.file);
- retval = do_splice_direct(in.file, &pos, out.file, &out_pos, count, fl);
- file_end_write(out.file);
+ opipe = get_pipe_info(out.file, true);
+ if (!opipe) {
+ retval = rw_verify_area(WRITE, out.file, &out_pos, count);
+ if (retval < 0)
+ goto fput_out;
+ file_start_write(out.file);
+ retval = do_splice_direct(in.file, &pos, out.file, &out_pos,
+ count, fl);
+ file_end_write(out.file);
+ } else {
+ retval = splice_file_to_pipe(in.file, opipe, &pos, count, fl);
+ }
if (retval > 0) {
add_rchar(current, retval);