nfsdiropres *
nfsproc_lookup_2_svc(nfsdiropargs *argp, struct svc_req *rqstp)
{
static nfsdiropres res;
am_node *mp;
int retry;
uid_t uid;
gid_t gid;
if (amuDebug(D_TRACE))
plog(XLOG_DEBUG, "lookup:");
/* finally, find the effective uid/gid from RPC request */
if (getcreds(rqstp, &uid, &gid, nfsxprt) < 0)
plog(XLOG_ERROR, "cannot get uid/gid from RPC credentials");
xsnprintf(opt_uid, sizeof(uid_str), "%d", (int) uid);
xsnprintf(opt_gid, sizeof(gid_str), "%d", (int) gid);
mp = fh_to_mp3(&argp->da_fhandle, &retry, VLOOK_CREATE);
if (mp == NULL) {
if (retry < 0) {
amd_stats.d_drops++;
return 0;
}
res.dr_status = nfs_error(retry);
} else {
int error;
am_node *ap;
if (amuDebug(D_TRACE))
plog(XLOG_DEBUG, "\tlookup(%s, %s)", mp->am_path, argp->da_name);
ap = mp->am_al->al_mnt->mf_ops->lookup_child(mp, argp->da_name, &error, VLOOK_CREATE);
if (ap && error < 0)
ap = mp->am_al->al_mnt->mf_ops->mount_child(ap, &error);
if (ap == 0) {
if (error < 0) {
amd_stats.d_drops++;
return 0;
}
res.dr_status = nfs_error(error);
} else {
/*
* XXX: EXPERIMENTAL! Delay unmount of what was looked up. This
* should reduce the chance for race condition between unmounting an
* entry synchronously, and re-mounting it asynchronously.
*/
if (ap->am_ttl < mp->am_ttl)
ap->am_ttl = mp->am_ttl;
mp_to_fh(ap, &res.dr_u.dr_drok_u.drok_fhandle);
res.dr_u.dr_drok_u.drok_attributes = ap->am_fattr;
res.dr_status = NFS_OK;
}
mp->am_stats.s_lookup++;
/* reschedule_timeout_mp(); */
}
return &res;
}
/*
* Get the filehandle for a particular named directory.
* This is used during the bootstrap to tell the kernel
* the filehandles of the initial automount points.
*/
am_nfs_fh *
get_root_nfs_fh(char *dir)
{
static am_nfs_fh nfh;
am_node *mp = get_root_ap(dir);
if (mp) {
mp_to_fh(mp, &nfh);
return &nfh;
}
/*
* Should never get here...
*/
plog(XLOG_ERROR, "Can't find root filehandle for %s", dir);
return 0;
}
void
nfs_quick_reply(am_node *mp, int error)
{
SVCXPRT *transp = mp->am_transp;
nfsdiropres res;
xdrproc_t xdr_result = (xdrproc_t) xdr_diropres;
/*
* If there's a transp structure then we can reply to the client's
* nfs lookup request.
*/
if (transp) {
if (error == 0) {
/*
* Construct a valid reply to a lookup request. Same
* code as in nfsproc_lookup_2_svc() above.
*/
mp_to_fh(mp, &res.dr_u.dr_drok_u.drok_fhandle);
res.dr_u.dr_drok_u.drok_attributes = mp->am_fattr;
res.dr_status = NFS_OK;
} else
/*
* Return the error that was passed to us.
*/
res.dr_status = nfs_error(error);
/*
* Send off our reply
*/
if (!svc_sendreply(transp, (XDRPROC_T_TYPE) xdr_result, (SVC_IN_ARG_TYPE) & res))
svcerr_systemerr(transp);
/*
* Free up transp. It's only used for one reply.
*/
XFREE(mp->am_transp);
dlog("Quick reply sent for %s", mp->am_al->al_mnt->mf_mount);
}
}
