From 86e42d748211e58beee431b2639e57ac01ffe3be Mon Sep 17 00:00:00 2001 From: "Venkateswararao Jujjuri (JV)" Date: Mon, 8 Aug 2011 23:33:48 +0530 Subject: hw/9pfs: Add yeild support for readlink Signed-off-by: Venkateswararao Jujjuri (JV) Signed-off-by: Aneesh Kumar K.V --- hw/9pfs/cofs.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 hw/9pfs/cofs.c (limited to 'hw/9pfs/cofs.c') diff --git a/hw/9pfs/cofs.c b/hw/9pfs/cofs.c new file mode 100644 index 0000000..6bb8b47 --- /dev/null +++ b/hw/9pfs/cofs.c @@ -0,0 +1,44 @@ + +/* + * Virtio 9p backend + * + * Copyright IBM, Corp. 2011 + * + * Authors: + * Aneesh Kumar K.V + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + */ + +#include "fsdev/qemu-fsdev.h" +#include "qemu-thread.h" +#include "qemu-coroutine.h" +#include "virtio-9p-coth.h" + +int v9fs_co_readlink(V9fsState *s, V9fsString *path, V9fsString *buf) +{ + int err; + ssize_t len; + + buf->data = qemu_malloc(PATH_MAX); + v9fs_co_run_in_worker( + { + len = s->ops->readlink(&s->ctx, path->data, + buf->data, PATH_MAX - 1); + if (len > -1) { + buf->size = len; + buf->data[len] = 0; + err = 0; + } else { + err = -errno; + } + }); + if (err) { + qemu_free(buf->data); + buf->data = NULL; + buf->size = 0; + } + return err; +} -- cgit v1.1