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[virtio-9p] Implement TLINK for 9P2000.L 

Create a Hardlink.

SYNOPSIS

size[4] Tlink tag[2] dfid[4] oldfid[4] newpath[s]

size[4] Rlink tag[2]

DESCRIPTION

Create a link 'newpath' in directory pointed by dfid linking to oldfid path.

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
This commit is contained in:
Venkateswararao Jujjuri (JV) 2010-06-09 11:21:15 -07:00 committed by Aneesh Kumar K.V
parent c79ce73747
commit b2c224be19
3 changed files with 49 additions and 0 deletions
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9
hw/virtio-9p-debug.c
View File

@ -497,6 +497,15 @@ void pprint_pdu(V9fsPDU *pdu)
case P9_RCLUNK:
fprintf(llogfile, "RCLUNK: (");
break;
case P9_TLINK:
fprintf(llogfile, "TLINK: (");
pprint_int32(pdu, 0, &offset, "fid");
pprint_str(pdu, 0, &offset, ", oldpath");
pprint_str(pdu, 0, &offset, ", newpath");
break;
case P9_RLINK:
fprintf(llogfile, "RLINK: (");
break;
case P9_TREMOVE:
fprintf(llogfile, "TREMOVE: (");
pprint_int32(pdu, 0, &offset, "fid");

38
hw/virtio-9p.c
View File

@ -2307,6 +2307,43 @@ static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
complete_pdu(s, pdu, 7);
}
static void v9fs_link(V9fsState *s, V9fsPDU *pdu)
{
int32_t dfid, oldfid;
V9fsFidState *dfidp, *oldfidp;
V9fsString name, fullname;
size_t offset = 7;
int err = 0;
v9fs_string_init(&fullname);
pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
dfidp = lookup_fid(s, dfid);
if (dfidp == NULL) {
err = -errno;
goto out;
}
oldfidp = lookup_fid(s, oldfid);
if (oldfidp == NULL) {
err = -errno;
goto out;
}
v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
err = offset;
err = v9fs_do_link(s, &oldfidp->path, &fullname);
if (err) {
err = -errno;
}
v9fs_string_free(&fullname);
out:
v9fs_string_free(&name);
complete_pdu(s, pdu, err);
}
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs,
int err)
{
@ -2680,6 +2717,7 @@ static pdu_handler_t *pdu_handlers[] = {
[P9_TAUTH] = v9fs_auth,
#endif
[P9_TFLUSH] = v9fs_flush,
[P9_TLINK] = v9fs_link,
[P9_TCREATE] = v9fs_create,
[P9_TWRITE] = v9fs_write,
[P9_TWSTAT] = v9fs_wstat,

2
hw/virtio-9p.h
View File

@ -21,6 +21,8 @@ enum {
P9_RSETATTR,
P9_TREADDIR = 40,
P9_RREADDIR,
P9_TLINK = 70,
P9_RLINK,
P9_TVERSION = 100,
P9_RVERSION,
P9_TAUTH = 102,