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new helper: alloc_file_clone()

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alloc_file_clone(old_file, mode, ops): create a new struct file with
->f_path equal to that of old_file.  pipe converted.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2018-06-17 14:15:10 -04:00
parent 152b6372c9
commit 183266f26f
3 changed files with 15 additions and 4 deletions
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6
fs/pipe.c
View file

@ -761,15 +761,13 @@ int create_pipe_files(struct file **res, int flags)
f->private_data = inode->i_pipe;
res[0] = alloc_file(&f->f_path, O_RDONLY | (flags & O_NONBLOCK),
&pipefifo_fops);
res[0] = alloc_file_clone(f, O_RDONLY | (flags & O_NONBLOCK),
&pipefifo_fops);
if (IS_ERR(res[0])) {
put_pipe_info(inode, inode->i_pipe);
fput(f);
return PTR_ERR(res[0]);
}
path_get(&f->f_path);
res[0]->private_data = inode->i_pipe;
res[1] = f;
return 0;