static int plan9_create(struct session_struct *sp, struct p9_client **cp)
{
struct p9_nbd_device *nbd = sp->nbd;
struct p9_client *clnt = NULL;
int err;
dprintk(DBG_PLAN9, "%s: p9_client_create %s %s\n",
nbd->disk->disk_name, nbd->p9_addr, nbd->p9_opts);
session_busy(sp);
clnt = p9_client_create(nbd->p9_addr, nbd->p9_opts);
if (IS_ERR(clnt))
return PTR_ERR(clnt);
if (clnt->msize - P9_IOHDRSZ < nbd->blksize) {
err = -EINVAL;
goto error;
}
if (clnt->proto_version != p9_proto_2000L) {
err = -EINVAL;
goto error;
}
if (session_idle(sp) < 0) {
err = -ETIMEDOUT;
goto error;
}
*cp = clnt;
return 0;
error:
if (clnt)
p9_client_destroy(clnt);
return err;
}
struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
const char *dev_name, char *data)
{
int retval = -EINVAL;
struct p9_transport *trans;
struct p9_fid *fid;
v9ses->name = __getname();
if (!v9ses->name)
return ERR_PTR(-ENOMEM);
v9ses->remotename = __getname();
if (!v9ses->remotename) {
__putname(v9ses->name);
return ERR_PTR(-ENOMEM);
}
strcpy(v9ses->name, V9FS_DEFUSER);
strcpy(v9ses->remotename, V9FS_DEFANAME);
v9fs_parse_options(data, v9ses);
switch (v9ses->proto) {
case PROTO_TCP:
trans = p9_trans_create_tcp(dev_name, v9ses->port);
break;
case PROTO_UNIX:
trans = p9_trans_create_unix(dev_name);
*v9ses->remotename = 0;
break;
case PROTO_FD:
trans = p9_trans_create_fd(v9ses->rfdno, v9ses->wfdno);
*v9ses->remotename = 0;
break;
#ifdef CONFIG_PCI_9P
case PROTO_PCI:
trans = p9pci_trans_create();
*v9ses->remotename = 0;
break;
#endif
default:
printk(KERN_ERR "v9fs: Bad mount protocol %d\n", v9ses->proto);
retval = -ENOPROTOOPT;
goto error;
};
if (IS_ERR(trans)) {
retval = PTR_ERR(trans);
trans = NULL;
goto error;
}
v9ses->clnt = p9_client_create(trans, v9ses->maxdata + P9_IOHDRSZ,
v9ses->extended);
if (IS_ERR(v9ses->clnt)) {
retval = PTR_ERR(v9ses->clnt);
v9ses->clnt = NULL;
P9_DPRINTK(P9_DEBUG_ERROR, "problem initializing 9p client\n");
goto error;
}
fid = p9_client_attach(v9ses->clnt, NULL, v9ses->name,
v9ses->remotename);
if (IS_ERR(fid)) {
retval = PTR_ERR(fid);
fid = NULL;
P9_DPRINTK(P9_DEBUG_ERROR, "cannot attach\n");
goto error;
}
return fid;
error:
v9fs_session_close(v9ses);
return ERR_PTR(retval);
}
struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
const char *dev_name, char *data)
{
int retval = -EINVAL;
struct p9_fid *fid;
int rc;
v9ses->uname = __getname();
if (!v9ses->uname)
return ERR_PTR(-ENOMEM);
v9ses->aname = __getname();
if (!v9ses->aname) {
__putname(v9ses->uname);
return ERR_PTR(-ENOMEM);
}
v9ses->flags = V9FS_EXTENDED | V9FS_ACCESS_USER;
strcpy(v9ses->uname, V9FS_DEFUSER);
strcpy(v9ses->aname, V9FS_DEFANAME);
v9ses->uid = ~0;
v9ses->dfltuid = V9FS_DEFUID;
v9ses->dfltgid = V9FS_DEFGID;
if (data) {
v9ses->options = kstrdup(data, GFP_KERNEL);
if (!v9ses->options) {
P9_DPRINTK(P9_DEBUG_ERROR,
"failed to allocate copy of option string\n");
retval = -ENOMEM;
goto error;
}
}
rc = v9fs_parse_options(v9ses);
if (rc < 0) {
retval = rc;
goto error;
}
v9ses->clnt = p9_client_create(dev_name, v9ses->options);
if (IS_ERR(v9ses->clnt)) {
retval = PTR_ERR(v9ses->clnt);
v9ses->clnt = NULL;
P9_DPRINTK(P9_DEBUG_ERROR, "problem initializing 9p client\n");
goto error;
}
if (!v9ses->clnt->dotu)
v9ses->flags &= ~V9FS_EXTENDED;
v9ses->maxdata = v9ses->clnt->msize;
/* for legacy mode, fall back to V9FS_ACCESS_ANY */
if (!v9fs_extended(v9ses) &&
((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) {
v9ses->flags &= ~V9FS_ACCESS_MASK;
v9ses->flags |= V9FS_ACCESS_ANY;
v9ses->uid = ~0;
}
fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, ~0,
v9ses->aname);
if (IS_ERR(fid)) {
retval = PTR_ERR(fid);
fid = NULL;
P9_DPRINTK(P9_DEBUG_ERROR, "cannot attach\n");
goto error;
}
if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_SINGLE)
fid->uid = v9ses->uid;
else
fid->uid = ~0;
return fid;
error:
return ERR_PTR(retval);
}