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| author | M. Mohan Kumar <mohan@in.ibm.com> | 2010-09-14 15:08:25 +0530 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2010-10-20 12:10:58 -0500 |
| commit | df0973a4650d4889463ff66cb6fbdf0ab8090c70 (patch) | |
| tree | 8ce2def5ae12f8b87e9ef0cdc1c05799b82353fd /hw/virtio-9p.c | |
| parent | b41e95d34877c1917ba9fca7ca8f5d4122d4c619 (diff) | |
| download | qemu-df0973a4650d4889463ff66cb6fbdf0ab8090c70.tar.gz qemu-df0973a4650d4889463ff66cb6fbdf0ab8090c70.tar.bz2 qemu-df0973a4650d4889463ff66cb6fbdf0ab8090c70.zip | |
qemu-virtio-9p: Implement TREADLINK operation for 9p2000.L
Synopsis
size[4] TReadlink tag[2] fid[4]
size[4] RReadlink tag[2] target[s]
Description
Readlink is used to return the contents of the symoblic link
referred by fid. Contents of symboic link is returned as a
response.
target[s] - Contents of the symbolic link referred by fid.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Diffstat (limited to 'hw/virtio-9p.c')
| -rw-r--r-- | hw/virtio-9p.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/hw/virtio-9p.c b/hw/virtio-9p.c index e8eec7f60a..6c807953e9 100644 --- a/hw/virtio-9p.c +++ b/hw/virtio-9p.c @@ -3520,6 +3520,49 @@ out: qemu_free(vs); } +static void v9fs_readlink_post_readlink(V9fsState *s, V9fsReadLinkState *vs, + int err) +{ + if (err < 0) { + err = -errno; + goto out; + } + vs->offset += pdu_marshal(vs->pdu, vs->offset, "s", &vs->target); + err = vs->offset; +out: + complete_pdu(s, vs->pdu, err); + v9fs_string_free(&vs->target); + qemu_free(vs); +} + +static void v9fs_readlink(V9fsState *s, V9fsPDU *pdu) +{ + int32_t fid; + V9fsReadLinkState *vs; + int err = 0; + V9fsFidState *fidp; + + vs = qemu_malloc(sizeof(*vs)); + vs->pdu = pdu; + vs->offset = 7; + + pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); + + fidp = lookup_fid(s, fid); + if (fidp == NULL) { + err = -ENOENT; + goto out; + } + + v9fs_string_init(&vs->target); + err = v9fs_do_readlink(s, &fidp->path, &vs->target); + v9fs_readlink_post_readlink(s, vs, err); + return; +out: + complete_pdu(s, vs->pdu, err); + qemu_free(vs); +} + typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); static pdu_handler_t *pdu_handlers[] = { @@ -3533,6 +3576,7 @@ static pdu_handler_t *pdu_handlers[] = { [P9_TRENAME] = v9fs_rename, [P9_TLOCK] = v9fs_lock, [P9_TGETLOCK] = v9fs_getlock, + [P9_TREADLINK] = v9fs_readlink, [P9_TMKDIR] = v9fs_mkdir, [P9_TVERSION] = v9fs_version, [P9_TLOPEN] = v9fs_open, |