Commit 52cbee2a authored Feb 05, 2020 by Sergey Alirzaev Committed by Dominique Martinet Mar 27, 2020

9p: read only once on O_NONBLOCK

A proper way to handle O_NONBLOCK would be making the requests and
responses happen asynchronously, but this would require serious code
refactoring.

Link: http://lkml.kernel.org/r/20200205003457.24340-2-l29ah@cock.li


Signed-off-by: Sergey Alirzaev <l29ah@cock.li>
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>

parent 388f6966

fs/9p/vfs_file.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -388,6 +388,9 @@ v9fs_file_read_iter(struct kiocb iocb, struct iov_iter to)
		p9_debug(P9_DEBUG_VFS, "count %zu offset %lld\n",
		iov_iter_count(to), iocb->ki_pos);

		if (iocb->ki_filp->f_flags & O_NONBLOCK)
		ret = p9_client_read_once(fid, iocb->ki_pos, to, &err);
		else
		ret = p9_client_read(fid, iocb->ki_pos, to, &err);
		if (!ret)
		return err;

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