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

1 files changed, 558 insertions, 0 deletions

diff --git a/xlators/nfs/lib/src/msg-nfs3.c b/xlators/nfs/lib/src/msg-nfs3.c
new file mode 100644
index 00000000000..781466045db
--- /dev/null
+++ b/xlators/nfs/lib/src/msg-nfs3.c
@@ -0,0 +1,558 @@
+/*
+  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 <sys/uio.h>
+#include <rpc/rpc.h>
+#include <rpc/xdr.h>
+#include <sys/types.h>
+
+#include "xdr-nfs3.h"
+#include "msg-nfs3.h"
+#include "xdr-common.h"
+
+
+/* Decode the mount path from the network message in inmsg
+ * into the memory referenced by outpath.iov_base.
+ * The size allocated for outpath.iov_base is outpath.iov_len.
+ * The size of the path extracted from the message is returned.
+ */
+ssize_t
+xdr_to_mountpath (struct iovec outpath, struct iovec inmsg)
+{
+        XDR     xdr;
+        ssize_t ret = -1;
+        char    *mntpath = NULL;
+
+        if ((!outpath.iov_base) || (!inmsg.iov_base))
+                return -1;
+
+        xdrmem_create (&xdr, inmsg.iov_base, (unsigned int)inmsg.iov_len,
+                       XDR_DECODE);
+
+        mntpath = outpath.iov_base;
+        if (!xdr_dirpath (&xdr, (dirpath *)&mntpath)) {
+                ret = -1;
+                goto ret;
+        }
+
+        ret = xdr_decoded_length (xdr);
+
+ret:
+        return ret;
+}
+
+
+ssize_t
+xdr_serialize_generic (struct iovec outmsg, void *res, xdrproc_t proc)
+{
+        ssize_t ret = -1;
+        XDR     xdr;
+
+        if ((!outmsg.iov_base) || (!res) || (!proc))
+                return -1;
+
+        xdrmem_create (&xdr, outmsg.iov_base, (unsigned int)outmsg.iov_len,
+                       XDR_ENCODE);
+
+        if (!proc (&xdr, res)) {
+                ret = -1;
+                goto ret;
+        }
+
+        ret = xdr_encoded_length (xdr);
+
+ret:
+        return ret;
+}
+
+
+ssize_t
+xdr_to_generic (struct iovec inmsg, void *args, xdrproc_t proc)
+{
+        XDR     xdr;
+        ssize_t ret = -1;
+
+        if ((!inmsg.iov_base) || (!args) || (!proc))
+                return -1;
+
+        xdrmem_create (&xdr, inmsg.iov_base, (unsigned int)inmsg.iov_len,
+                       XDR_DECODE);
+
+        if (!proc (&xdr, args)) {
+                ret  = -1;
+                goto ret;
+        }
+
+        ret = xdr_decoded_length (xdr);
+ret:
+        return ret;
+}
+
+
+ssize_t
+xdr_to_generic_payload (struct iovec inmsg, void *args, xdrproc_t proc,
+                        struct iovec *pendingpayload)
+{
+        XDR     xdr;
+        ssize_t ret = -1;
+
+        if ((!inmsg.iov_base) || (!args) || (!proc))
+                return -1;
+
+        xdrmem_create (&xdr, inmsg.iov_base, (unsigned int)inmsg.iov_len,
+                       XDR_DECODE);
+
+        if (!proc (&xdr, args)) {
+                ret  = -1;
+                goto ret;
+        }
+
+        ret = xdr_decoded_length (xdr);
+
+        if (pendingpayload) {
+                pendingpayload->iov_base = xdr_decoded_remaining_addr (xdr);
+                pendingpayload->iov_len = xdr_decoded_remaining_len (xdr);
+        }
+
+ret:
+        return ret;
+}
+
+
+/* Translate the mountres3 structure in res into XDR format into memory
+ * referenced by outmsg.iov_base.
+ * Returns the number of bytes used in encoding into XDR format.
+ */
+ssize_t
+xdr_serialize_mountres3 (struct iovec outmsg, mountres3 *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_mountres3);
+}
+
+
+ssize_t
+xdr_serialize_mountbody (struct iovec outmsg, mountbody *mb)
+{
+        return xdr_serialize_generic (outmsg, (void *)mb,
+                                      (xdrproc_t)xdr_mountbody);
+}
+
+ssize_t
+xdr_serialize_mountlist (struct iovec outmsg, mountlist *ml)
+{
+        return xdr_serialize_generic (outmsg, (void *)ml,
+                                      (xdrproc_t)xdr_mountlist);
+}
+
+
+ssize_t
+xdr_serialize_mountstat3 (struct iovec outmsg, mountstat3 *m)
+{
+        return xdr_serialize_generic (outmsg, (void *)m,
+                                      (xdrproc_t)xdr_mountstat3);
+}
+
+
+ssize_t
+xdr_to_getattr3args (struct iovec inmsg, getattr3args *ga)
+{
+        return xdr_to_generic (inmsg, (void *)ga,(xdrproc_t)xdr_getattr3args);
+}
+
+
+ssize_t
+xdr_serialize_getattr3res (struct iovec outmsg, getattr3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_getattr3res);
+}
+
+
+ssize_t
+xdr_serialize_setattr3res (struct iovec outmsg, setattr3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_setattr3res);
+}
+
+
+ssize_t
+xdr_to_setattr3args (struct iovec inmsg, setattr3args *sa)
+{
+        return xdr_to_generic (inmsg, (void *)sa, (xdrproc_t)xdr_setattr3args);
+}
+
+
+ssize_t
+xdr_serialize_lookup3res (struct iovec outmsg, lookup3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_lookup3res);
+}
+
+
+ssize_t
+xdr_to_lookup3args (struct iovec inmsg, lookup3args *la)
+{
+        return xdr_to_generic (inmsg, (void *)la, (xdrproc_t)xdr_lookup3args);
+}
+
+
+ssize_t
+xdr_to_access3args (struct iovec inmsg, access3args *ac)
+{
+        return xdr_to_generic (inmsg,(void *)ac, (xdrproc_t)xdr_access3args);
+}
+
+
+ssize_t
+xdr_serialize_access3res (struct iovec outmsg, access3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_access3res);
+}
+
+
+ssize_t
+xdr_to_readlink3args (struct iovec inmsg, readlink3args *ra)
+{
+        return xdr_to_generic (inmsg, (void *)ra, (xdrproc_t)xdr_readlink3args);
+}
+
+
+ssize_t
+xdr_serialize_readlink3res (struct iovec outmsg, readlink3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_readlink3res);
+}
+
+
+ssize_t
+xdr_to_read3args (struct iovec inmsg, read3args *ra)
+{
+        return xdr_to_generic (inmsg, (void *)ra, (xdrproc_t)xdr_read3args);
+}
+
+
+ssize_t
+xdr_serialize_read3res (struct iovec outmsg, read3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_read3res);
+}
+
+ssize_t
+xdr_serialize_read3res_nocopy (struct iovec outmsg, read3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_read3res_nocopy);
+}
+
+
+ssize_t
+xdr_to_write3args (struct iovec inmsg, write3args *wa)
+{
+        return xdr_to_generic (inmsg, (void *)wa,(xdrproc_t)xdr_write3args);
+}
+
+
+ssize_t
+xdr_to_write3args_nocopy (struct iovec inmsg, write3args *wa,
+                          struct iovec *payload)
+{
+        return xdr_to_generic_payload (inmsg, (void *)wa,
+                                       (xdrproc_t)xdr_write3args, payload);
+}
+
+
+ssize_t
+xdr_serialize_write3res (struct iovec outmsg, write3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_write3res);
+}
+
+
+ssize_t
+xdr_to_create3args (struct iovec inmsg, create3args *ca)
+{
+        return xdr_to_generic (inmsg, (void *)ca, (xdrproc_t)xdr_create3args);
+}
+
+
+ssize_t
+xdr_serialize_create3res (struct iovec outmsg, create3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_create3res);
+}
+
+
+ssize_t
+xdr_serialize_mkdir3res (struct iovec outmsg, mkdir3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_mkdir3res);
+}
+
+
+ssize_t
+xdr_to_mkdir3args (struct iovec inmsg, mkdir3args *ma)
+{
+        return xdr_to_generic (inmsg, (void *)ma, (xdrproc_t)xdr_mkdir3args);
+}
+
+
+ssize_t
+xdr_to_symlink3args (struct iovec inmsg, symlink3args *sa)
+{
+        return xdr_to_generic (inmsg, (void *)sa, (xdrproc_t)xdr_symlink3args);
+}
+
+
+ssize_t
+xdr_serialize_symlink3res (struct iovec outmsg, symlink3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_symlink3res);
+}
+
+
+ssize_t
+xdr_to_mknod3args (struct iovec inmsg, mknod3args *ma)
+{
+        return xdr_to_generic (inmsg, (void *)ma, (xdrproc_t)xdr_mknod3args);
+}
+
+
+ssize_t
+xdr_serialize_mknod3res (struct iovec outmsg, mknod3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_mknod3res);
+}
+
+
+ssize_t
+xdr_to_remove3args (struct iovec inmsg, remove3args *ra)
+{
+        return xdr_to_generic (inmsg, (void *)ra, (xdrproc_t)xdr_remove3args);
+}
+
+
+ssize_t
+xdr_serialize_remove3res (struct iovec outmsg, remove3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_remove3res);
+}
+
+
+ssize_t
+xdr_to_rmdir3args (struct iovec inmsg, rmdir3args *ra)
+{
+        return xdr_to_generic (inmsg, (void *)ra, (xdrproc_t)xdr_rmdir3args);
+}
+
+
+ssize_t
+xdr_serialize_rmdir3res (struct iovec outmsg, rmdir3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_rmdir3res);
+}
+
+
+ssize_t
+xdr_serialize_rename3res (struct iovec outmsg, rename3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_rename3res);
+}
+
+
+ssize_t
+xdr_to_rename3args (struct iovec inmsg, rename3args *ra)
+{
+        return xdr_to_generic (inmsg, (void *)ra, (xdrproc_t)xdr_rename3args);
+}
+
+
+ssize_t
+xdr_serialize_link3res (struct iovec outmsg, link3res *li)
+{
+        return xdr_serialize_generic (outmsg, (void *)li,
+                                      (xdrproc_t)xdr_link3res);
+}
+
+
+ssize_t
+xdr_to_link3args (struct iovec inmsg, link3args *la)
+{
+        return xdr_to_generic (inmsg, (void *)la, (xdrproc_t)xdr_link3args);
+}
+
+
+ssize_t
+xdr_to_readdir3args (struct iovec inmsg, readdir3args *rd)
+{
+        return xdr_to_generic (inmsg, (void *)rd, (xdrproc_t)xdr_readdir3args);
+}
+
+
+ssize_t
+xdr_serialize_readdir3res (struct iovec outmsg, readdir3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_readdir3res);
+}
+
+
+ssize_t
+xdr_to_readdirp3args (struct iovec inmsg, readdirp3args *rp)
+{
+        return xdr_to_generic (inmsg, (void *)rp, (xdrproc_t)xdr_readdirp3args);
+}
+
+
+ssize_t
+xdr_serialize_readdirp3res (struct iovec outmsg, readdirp3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_readdirp3res);
+}
+
+
+ssize_t
+xdr_to_fsstat3args (struct iovec inmsg, fsstat3args *fa)
+{
+        return xdr_to_generic (inmsg, (void *)fa, (xdrproc_t)xdr_fsstat3args);
+}
+
+
+ssize_t
+xdr_serialize_fsstat3res (struct iovec outmsg, fsstat3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_fsstat3res);
+}
+
+ssize_t
+xdr_to_fsinfo3args (struct iovec inmsg, fsinfo3args *fi)
+{
+        return xdr_to_generic (inmsg, (void *)fi, (xdrproc_t)xdr_fsinfo3args);
+}
+
+
+ssize_t
+xdr_serialize_fsinfo3res (struct iovec outmsg, fsinfo3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_fsinfo3res);
+}
+
+
+ssize_t
+xdr_to_pathconf3args (struct iovec inmsg, pathconf3args *pc)
+{
+        return xdr_to_generic (inmsg, (void *)pc, (xdrproc_t)xdr_pathconf3args);}
+
+
+ssize_t
+xdr_serialize_pathconf3res (struct iovec outmsg, pathconf3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_pathconf3res);
+}
+
+
+ssize_t
+xdr_to_commit3args (struct iovec inmsg, commit3args *ca)
+{
+        return xdr_to_generic (inmsg, (void *)ca, (xdrproc_t)xdr_commit3args);
+}
+
+
+ssize_t
+xdr_serialize_commit3res (struct iovec outmsg, commit3res *res)
+{
+        return xdr_serialize_generic (outmsg, (void *)res,
+                                      (xdrproc_t)xdr_commit3res);
+}
+
+
+ssize_t
+xdr_serialize_exports (struct iovec outmsg, exports *elist)
+{
+        XDR     xdr;
+        ssize_t  ret = -1;
+
+        if ((!outmsg.iov_base) || (!elist))
+                return -1;
+
+        xdrmem_create (&xdr, outmsg.iov_base, (unsigned int)outmsg.iov_len,
+                       XDR_ENCODE);
+
+        if (!xdr_exports (&xdr, elist))
+                goto ret;
+
+        ret = xdr_decoded_length (xdr);
+
+ret:
+        return ret;
+}
+
+
+ssize_t
+xdr_serialize_nfsstat3 (struct iovec outmsg, nfsstat3 *s)
+{
+        return xdr_serialize_generic (outmsg, (void *)s,
+                                      (xdrproc_t)xdr_nfsstat3);
+}
+
+
+ssize_t
+xdr_length_round_up (size_t len, size_t bufsize)
+{
+        int     roundup = 0;
+
+        roundup = len % XDR_BYTES_PER_UNIT;
+        if (roundup > 0)
+                roundup = XDR_BYTES_PER_UNIT - roundup;
+
+        if ((roundup > 0) && ((roundup + len) <= bufsize))
+                len += roundup;
+
+        return len;
+}
+
+int
+xdr_bytes_round_up (struct iovec *vec, size_t bufsize)
+{
+        vec->iov_len = xdr_length_round_up (vec->iov_len, bufsize);
+        return 0;
+}
+