static Npfcall *
np_auth(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *afid;
Npfcall *rc;
rc = NULL;
conn = req->conn;
afid = np_fid_find(conn, tc->afid);
if (afid) {
np_werror(Einuse, EIO);
goto done;
}
afid = np_fid_create(conn, tc->afid, NULL);
if (!afid) {
np_werror(Enomem, ENOMEM);
goto done;
}
if (conn->srv->auth)
rc = (*conn->srv->auth->auth)(afid, &tc->uname, &tc->aname);
else
np_werror(Enoauth, EIO);
afid->type = Qtauth;
done:
np_fid_decref(afid);
return rc;
}
static Npfcall *
np_attach(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *fid, *afid;
Npfcall *rc;
rc = NULL;
conn = req->conn;
afid = NULL;
/* the fid that the connecting client wants to call root */
fid = np_fid_find(conn, tc->fid);
/* if this fid exists then report error */
if (fid) {
np_werror(Einuse, EIO);
goto done;
}
/* create a fid structure for the root */
fid = np_fid_create(conn, tc->fid, NULL);
if (!fid) {
np_werror(Enomem, ENOMEM);
goto done;
} else
/* maintain a reference count for fid */
np_fid_incref(fid);
req->fid = fid;
afid = np_fid_find(conn, tc->afid);
if (!afid) {
if (tc->afid!=NOFID) {
np_werror(Eunknownfid, EIO);
goto done;
}
if (!afid->type&Qtauth) {
np_werror(Ebadusefid, EIO);
goto done;
}
} else
np_fid_incref(afid);
if (conn->srv->auth) {
rc = (*conn->srv->auth->attach)(afid, &tc->uname, &tc->aname);
if (rc)
goto done;
}
rc = (*conn->srv->attach)(fid, afid, &tc->uname, &tc->aname);
done:
np_fid_decref(fid);
np_fid_decref(afid);
return rc;
}
static Npfcall *
np_walk(Npreq *req, Npfcall *tc)
{
int i;
Npconn *conn;
Npfid *fid, *newfid;
Npfcall *rc;
Npqid wqids[MAXWELEM];
rc = NULL;
conn = req->conn;
newfid = NULL;
fid = np_fid_find(conn, tc->fid);
if (!fid) {
np_werror(Eunknownfid, EIO);
goto done;
} else
np_fid_incref(fid);
req->fid = fid;
if (!fid->type&Qtdir) {
np_werror(Enotdir, ENOTDIR);
goto done;
}
if (fid->omode != (u16) ~0) {
np_werror(Ebadusefid, EIO);
goto done;
}
if (tc->nwname > MAXWELEM) {
np_werror(Etoomanywnames, EIO);
goto done;
}
if (tc->fid != tc->newfid) {
newfid = np_fid_find(conn, tc->newfid);
if (newfid) {
np_werror(Einuse, EIO);
goto done;
}
newfid = np_fid_create(conn, tc->newfid, NULL);
if (!newfid) {
np_werror(Enomem, ENOMEM);
goto done;
}
if (!(*conn->srv->clone)(fid, newfid))
goto done;
newfid->user = fid->user;
newfid->type = fid->type;
} else
newfid = fid;
np_fid_incref(newfid);
for(i = 0; i < tc->nwname;) {
if (!(*conn->srv->walk)(newfid, &tc->wnames[i], &wqids[i]))
break;
newfid->type = wqids[i].type;
i++;
if (i<(tc->nwname) && !newfid->type&Qtdir)
break;
}
if (i==0 && tc->nwname!=0)
goto done;
np_werror(NULL, 0);
if (tc->fid != tc->newfid)
np_fid_incref(newfid);
rc = np_create_rwalk(i, wqids);
done:
np_fid_decref(fid);
np_fid_decref(newfid);
return rc;
}
/* Look up operation's fid and assign it to req->fid.
* This is done before the request is handed off to a worker, with
* the plan of using fid data in scheduling work.
* The fid refcount is incremented here, then decremented in
* np_process_request ().
*/
static void
np_preprocess_request(Npreq *req)
{
Npfcall *tc = req->tcall;
Npconn *conn = req->conn;
switch (tc->type) {
case P9_TSTATFS:
req->fid = np_fid_find (conn, tc->u.tstatfs.fid);
break;
case P9_TLOPEN:
req->fid = np_fid_find (conn, tc->u.tlopen.fid);
break;
case P9_TLCREATE:
req->fid = np_fid_find (conn, tc->u.tlcreate.fid);
break;
case P9_TSYMLINK:
req->fid = np_fid_find (conn, tc->u.tsymlink.fid);
break;
case P9_TMKNOD:
req->fid = np_fid_find (conn, tc->u.tmknod.fid);
break;
case P9_TRENAME:
req->fid = np_fid_find (conn, tc->u.trename.fid);
break;
case P9_TREADLINK:
req->fid = np_fid_find (conn, tc->u.treadlink.fid);
break;
case P9_TGETATTR:
req->fid = np_fid_find (conn, tc->u.tgetattr.fid);
break;
case P9_TSETATTR:
req->fid = np_fid_find (conn, tc->u.tsetattr.fid);
break;
case P9_TXATTRWALK:
req->fid = np_fid_find (conn, tc->u.txattrwalk.fid);
break;
case P9_TXATTRCREATE:
req->fid = np_fid_find (conn, tc->u.txattrcreate.fid);
break;
case P9_TREADDIR:
req->fid = np_fid_find (conn, tc->u.treaddir.fid);
break;
case P9_TFSYNC:
req->fid = np_fid_find (conn, tc->u.tfsync.fid);
break;
case P9_TLOCK:
req->fid = np_fid_find (conn, tc->u.tlock.fid);
break;
case P9_TGETLOCK:
req->fid = np_fid_find (conn, tc->u.tgetlock.fid);
break;
case P9_TLINK:
req->fid = np_fid_find (conn, tc->u.tlink.dfid);
break;
case P9_TMKDIR:
req->fid = np_fid_find (conn, tc->u.tmkdir.fid);
break;
case P9_TVERSION:
break;
case P9_TAUTH:
req->fid = np_fid_create (conn, tc->u.tauth.afid);
if (!req->fid)
break;
req->fid->aname = np_strdup (&tc->u.tauth.aname);
if (!req->fid->aname)
np_fid_decref (&req->fid);
/* XXX leave fid->tpool NULL for now as auth
* can be handled in the default thread pool
* without risk of deadlock.
*/
break;
case P9_TATTACH:
req->fid = np_fid_create (conn, tc->u.tattach.fid);
if (!req->fid)
break;
req->fid->aname = np_strdup (&tc->u.tattach.aname);
if (!req->fid->aname)
np_fid_decref (&req->fid);
/* Here we select the tpool that will handle this
* request and requests on fids walked from this fid.
*/
np_tpool_select (req);
break;
case P9_TFLUSH:
break;
case P9_TWALK:
req->fid = np_fid_find (conn, tc->u.twalk.fid);
break;
case P9_TREAD:
req->fid = np_fid_find (conn, tc->u.tread.fid);
break;
case P9_TWRITE:
req->fid = np_fid_find (conn, tc->u.twrite.fid);
break;
case P9_TCLUNK:
req->fid = np_fid_find (conn, tc->u.tclunk.fid);
break;
case P9_TREMOVE:
req->fid = np_fid_find (conn, tc->u.tremove.fid);
break;
case P9_TRENAMEAT:
req->fid = np_fid_find (conn,
tc->u.trenameat.olddirfid);
break;
case P9_TUNLINKAT:
req->fid = np_fid_find (conn, tc->u.tunlinkat.dirfid);
break;
default:
break;
}
}
Npfcall *
np_walk(Npreq *req, Npfcall *tc)
{
int i;
Npconn *conn = req->conn;
Npfid *fid = req->fid;
Npfid *newfid = NULL;
Npfcall *rc = NULL;
Npqid wqids[P9_MAXWELEM];
if (!fid) {
np_uerror (EIO);
goto done;
}
#if 0
if (!(fid->type & P9_QTDIR)) {
np_uerror(ENOTDIR);
goto done;
}
#endif
/* FIXME: error if fid has been opened */
if (tc->u.twalk.nwname > P9_MAXWELEM) {
np_uerror(EIO);
goto done;
}
if (tc->u.twalk.fid != tc->u.twalk.newfid) {
newfid = np_fid_find(conn, tc->u.twalk.newfid);
if (newfid) {
np_uerror(EIO);
goto done;
}
newfid = np_fid_create(conn, tc->u.twalk.newfid, NULL);
if (!newfid)
goto done;
if (fid->type & P9_QTTMP) {
if (!np_ctl_clone (fid, newfid))
goto done;
} else {
if (!conn->srv->clone)
goto done;
if (!(*conn->srv->clone)(fid, newfid))
goto done;
}
np_user_incref(fid->user);
newfid->user = fid->user;
np_tpool_incref(fid->tpool);
newfid->tpool = fid->tpool;
newfid->type = fid->type;
if (!(newfid->aname = strdup (fid->aname))) {
np_uerror (ENOMEM);
goto done;
}
} else
newfid = fid;
np_fid_incref(newfid);
if (!(newfid->type & P9_QTTMP)) {
if (np_setfsid (req, newfid->user, -1) < 0)
goto done;
}
for(i = 0; i < tc->u.twalk.nwname;) {
if (newfid->type & P9_QTTMP) {
if (!np_ctl_walk (newfid, &tc->u.twalk.wnames[i],
&wqids[i]))
break;
} else {
if (!conn->srv->walk) {
np_uerror (ENOSYS);
break;
}
if (!(*conn->srv->walk)(newfid, &tc->u.twalk.wnames[i],
&wqids[i]))
break;
}
newfid->type = wqids[i].type;
i++;
if (i<(tc->u.twalk.nwname) && !(newfid->type & P9_QTDIR))
break;
}
if (i==0 && tc->u.twalk.nwname!=0)
goto done;
np_uerror(0);
if (tc->u.twalk.fid != tc->u.twalk.newfid)
np_fid_incref(newfid);
rc = np_create_rwalk(i, wqids);
done:
np_fid_decref(newfid);
return rc;
}