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authorShehjar Tikoo <shehjart@gluster.com>2010-03-31 07:27:01 +0000
committerAnand V. Avati <avati@dev.gluster.com>2010-03-31 07:43:55 -0700
commiteff83c8dae2a9f6d52ae2d8b069190a13f92deaf (patch)
treeda88bd0e73c14f5848d3ca8fe508b17d81aafc8e /xlators/nfs/lib/src/xdr-rpc.c
parentfce2ae459b356977aab9b0100db22047e54a994b (diff)
nfs: Add RPC and NFS XDR translation routines
Signed-off-by: Shehjar Tikoo <shehjart@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 399 (NFS translator with Mount v3 and NFS v3 support) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=399
Diffstat (limited to 'xlators/nfs/lib/src/xdr-rpc.c')
-rw-r--r--xlators/nfs/lib/src/xdr-rpc.c190
1 files changed, 190 insertions, 0 deletions
diff --git a/xlators/nfs/lib/src/xdr-rpc.c b/xlators/nfs/lib/src/xdr-rpc.c
new file mode 100644
index 000000000..ac0f8afd3
--- /dev/null
+++ b/xlators/nfs/lib/src/xdr-rpc.c
@@ -0,0 +1,190 @@
+/*
+ Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com>
+ This file is part of GlusterFS.
+
+ GlusterFS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 of the License,
+ or (at your option) any later version.
+
+ GlusterFS is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include <rpc/rpc.h>
+#include <rpc/pmap_clnt.h>
+#include <arpa/inet.h>
+#include <rpc/xdr.h>
+#include <sys/uio.h>
+#include <rpc/auth_unix.h>
+
+#include "mem-pool.h"
+#include "xdr-rpc.h"
+#include "xdr-common.h"
+#include "logging.h"
+
+/* Decodes the XDR format in msgbuf into rpc_msg.
+ * The remaining payload is returned into payload.
+ */
+int
+xdr_to_rpc_call (char *msgbuf, size_t len, struct rpc_msg *call,
+ struct iovec *payload, char *credbytes, char *verfbytes)
+{
+ XDR xdr;
+ char opaquebytes[MAX_AUTH_BYTES];
+ struct opaque_auth *oa = NULL;
+
+ if ((!msgbuf) || (!call))
+ return -1;
+
+ memset (call, 0, sizeof (*call));
+
+ oa = &call->rm_call.cb_cred;
+ if (!credbytes)
+ oa->oa_base = opaquebytes;
+ else
+ oa->oa_base = credbytes;
+
+ oa = &call->rm_call.cb_verf;
+ if (!verfbytes)
+ oa->oa_base = opaquebytes;
+ else
+ oa->oa_base = verfbytes;
+
+ xdrmem_create (&xdr, msgbuf, len, XDR_DECODE);
+ if (!xdr_callmsg (&xdr, call))
+ return -1;
+
+ if (payload) {
+ payload->iov_base = xdr_decoded_remaining_addr (xdr);
+ payload->iov_len = xdr_decoded_remaining_len (xdr);
+ }
+
+ return 0;
+}
+
+
+bool_t
+true_func (XDR *s, caddr_t *a)
+{
+ return TRUE;
+}
+
+
+int
+rpc_fill_empty_reply (struct rpc_msg *reply, uint32_t xid)
+{
+ if (!reply)
+ return -1;
+
+ /* Setting to 0 also results in reply verifier flavor to be
+ * set to AUTH_NULL which is what we want right now.
+ */
+ memset (reply, 0, sizeof (*reply));
+ reply->rm_xid = xid;
+ reply->rm_direction = REPLY;
+
+ return 0;
+}
+
+int
+rpc_fill_denied_reply (struct rpc_msg *reply, int rjstat, int auth_err)
+{
+ if (!reply)
+ return -1;
+
+ reply->rm_reply.rp_stat = MSG_DENIED;
+ reply->rjcted_rply.rj_stat = rjstat;
+ if (rjstat == RPC_MISMATCH) {
+ /* No problem with hardocoding
+ * RPC version numbers. We only support
+ * v2 anyway.
+ */
+ reply->rjcted_rply.rj_vers.low = 2;
+ reply->rjcted_rply.rj_vers.high = 2;
+ } else if (rjstat == AUTH_ERROR)
+ reply->rjcted_rply.rj_why = auth_err;
+
+ return 0;
+}
+
+
+int
+rpc_fill_accepted_reply (struct rpc_msg *reply, int arstat, int proglow,
+ int proghigh, int verf, int len, char *vdata)
+{
+ if (!reply)
+ return -1;
+
+ reply->rm_reply.rp_stat = MSG_ACCEPTED;
+ reply->acpted_rply.ar_stat = arstat;
+
+ reply->acpted_rply.ar_verf.oa_flavor = verf;
+ reply->acpted_rply.ar_verf.oa_length = len;
+ reply->acpted_rply.ar_verf.oa_base = vdata;
+ if (arstat == PROG_MISMATCH) {
+ reply->acpted_rply.ar_vers.low = proglow;
+ reply->acpted_rply.ar_vers.high = proghigh;
+ } else if (arstat == SUCCESS) {
+
+ /* This is a hack. I'd really like to build a custom
+ * XDR library because Sun RPC interface is not very flexible.
+ */
+ reply->acpted_rply.ar_results.proc = (xdrproc_t)true_func;
+ reply->acpted_rply.ar_results.where = NULL;
+ }
+
+ return 0;
+}
+
+int
+rpc_reply_to_xdr (struct rpc_msg *reply, char *dest, size_t len,
+ struct iovec *dst)
+{
+ XDR xdr;
+
+ if ((!dest) || (!reply) || (!dst))
+ return -1;
+
+ xdrmem_create (&xdr, dest, len, XDR_ENCODE);
+ if (!xdr_replymsg(&xdr, reply))
+ return -1;
+
+ dst->iov_base = dest;
+ dst->iov_len = xdr_encoded_length (xdr);
+
+ return 0;
+}
+
+
+int
+xdr_to_auth_unix_cred (char *msgbuf, int msglen, struct authunix_parms *au,
+ char *machname, gid_t *gids)
+{
+ XDR xdr;
+
+ if ((!msgbuf) || (!machname) || (!gids) || (!au))
+ return -1;
+
+ au->aup_machname = machname;
+ au->aup_gids = gids;
+
+ xdrmem_create (&xdr, msgbuf, msglen, XDR_DECODE);
+
+ if (!xdr_authunix_parms (&xdr, au))
+ return -1;
+
+ return 0;
+}
+