static void
_usercache_add (Npsrv *srv, Npuser *u)
{
Npusercache *uc = srv->usercache;
u->next = uc->users;
uc->users = u;
np_user_incref (u);
}
Npuser *
np_uid2user (Npsrv *srv, uid_t uid)
{
Npusercache *uc = srv->usercache;
Npuser *u = NULL;
xpthread_mutex_lock (&uc->lock);
if (!(u = _usercache_lookup (srv, NULL, uid)))
if ((u = _real_lookup_byuid (srv, uid)))
_usercache_add (srv, u);
xpthread_mutex_unlock (&uc->lock);
if (u)
np_user_incref (u);
return u;
}
Npuser *
np_uname2user (Npsrv *srv, char *uname)
{
Npusercache *uc = srv->usercache;
Npuser *u = NULL;
xpthread_mutex_lock (&uc->lock);
if (!(u = _usercache_lookup (srv, uname, P9_NONUNAME)))
if ((u = _real_lookup_byname (srv, uname)))
_usercache_add (srv, u);
xpthread_mutex_unlock (&uc->lock);
if (u)
np_user_incref (u);
return u;
}
static IOCtx
_ioctx_create_open (Npuser *user, Path path, int flags, u32 mode)
{
IOCtx ioctx;
struct stat sb;
ioctx = malloc (sizeof (*ioctx));
if (!ioctx) {
np_uerror (ENOMEM);
goto error;
}
pthread_mutex_init (&ioctx->lock, NULL);
ioctx->refcount = 1;
ioctx->lock_type = LOCK_UN;
ioctx->dir = NULL;
ioctx->open_flags = flags;
ioctx->user = user;
np_user_incref (user);
ioctx->prev = ioctx->next = NULL;
ioctx->fd = open (path->s, flags, mode);
if (ioctx->fd < 0) {
np_uerror (errno);
goto error;
}
if (fstat (ioctx->fd, &sb) < 0) {
np_uerror (errno);
goto error;
}
ioctx->iounit = 0; /* if iounit=0, v9fs will use msize-P9_IOHDRSZ */
#ifndef __MACH__
if (S_ISDIR(sb.st_mode) && !(ioctx->dir = fdopendir (ioctx->fd))) {
np_uerror (errno);
goto error;
}
#endif
if (S_ISDIR(sb.st_mode) && !(ioctx->dir = opendir (path->s))) {
np_uerror (errno);
goto error;
}
diod_ustat2qid (&sb, &ioctx->qid);
return ioctx;
error:
if (ioctx)
_ioctx_close_destroy (ioctx, 0);
return NULL;
}
/* Take another reference on afid->user and return it.
* If afid was for a different user return NULL.
*/
Npuser *
np_afid2user (Npfid *afid, Npstr *uname, u32 n_uname)
{
Npuser *u = NULL;
if (n_uname != P9_NONUNAME) {
if (n_uname != afid->user->uid) {
np_uerror (EPERM);
goto done;
}
} else {
if (np_strcmp (uname, afid->user->uname) != 0) {
np_uerror (EPERM);
goto done;
}
}
u = afid->user;
np_user_incref (u);
done:
return u;
}
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;
}