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author | Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com> | 2011-08-08 23:33:48 +0530 |
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committer | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2011-08-08 23:33:48 +0530 |
commit | 86e42d748211e58beee431b2639e57ac01ffe3be (patch) | |
tree | 41d7617a89452a50a69797839009c6cf17da6b42 /hw/9pfs/cofs.c | |
parent | ff06030f660647bba1c60184dc32730fa06f38fe (diff) | |
download | qemu-86e42d748211e58beee431b2639e57ac01ffe3be.zip qemu-86e42d748211e58beee431b2639e57ac01ffe3be.tar.gz qemu-86e42d748211e58beee431b2639e57ac01ffe3be.tar.bz2 |
hw/9pfs: Add yeild support for readlink
Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Diffstat (limited to 'hw/9pfs/cofs.c')
-rw-r--r-- | hw/9pfs/cofs.c | 44 |
1 files changed, 44 insertions, 0 deletions
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 <aneesh.kumar@linux.vnet.ibm.com> + * + * 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; +} |