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/*
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 Affero 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
Affero General Public License for more details.
You should have received a copy of the GNU Affero 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 "xlator.h"
#include "glusterfs.h"
#include "compat-errno.h"
#include "glusterd.h"
#include "glusterd-utils.h"
#include "glusterfs3.h"
#include "protocol-common.h"
#include "rpcsvc.h"
typedef ssize_t (*gfs_serialize_t) (struct iovec outmsg, void *data);
static size_t
build_volfile_path (const char *volname, char *path,
size_t path_len)
{
struct stat stbuf = {0,};
int32_t ret = -1;
glusterd_conf_t *priv = NULL;
char *vol = NULL;
char *dup_volname = NULL;
char *free_ptr = NULL;
char *tmp = NULL;
glusterd_volinfo_t *volinfo = NULL;
priv = THIS->private;
if (volname[0] != '/') {
/* Normal behavior */
dup_volname = gf_strdup (volname);
} else {
/* Bringing in NFS like behavior for mount command, */
/* With this, one can mount a volume with below cmd */
/* bash# mount -t glusterfs server:/volume /mnt/pnt */
dup_volname = gf_strdup (&volname[1]);
}
free_ptr = dup_volname;
ret = glusterd_volinfo_find (dup_volname, &volinfo);
if (ret) {
/* Split the volume name */
vol = strtok_r (dup_volname, ".", &tmp);
if (!vol)
goto out;
ret = glusterd_volinfo_find (vol, &volinfo);
if (ret)
goto out;
}
ret = snprintf (path, path_len, "%s/vols/%s/%s.vol",
priv->workdir, volinfo->volname, volname);
if (ret == -1)
goto out;
ret = stat (path, &stbuf);
if ((ret == -1) && (errno == ENOENT)) {
ret = snprintf (path, path_len, "%s/vols/%s/%s-fuse.vol",
priv->workdir, volinfo->volname, volname);
ret = stat (path, &stbuf);
}
if ((ret == -1) && (errno == ENOENT)) {
ret = snprintf (path, path_len, "%s/vols/%s/%s-tcp.vol",
priv->workdir, volinfo->volname, volname);
}
ret = 1;
out:
if (free_ptr)
GF_FREE (free_ptr);
return ret;
}
static int
xdr_to_glusterfs_req (rpcsvc_request_t *req, void *arg, gfs_serialize_t sfunc)
{
int ret = -1;
if (!req)
return -1;
ret = sfunc (req->msg[0], arg);
if (ret > 0)
ret = 0;
return ret;
}
int
server_getspec (rpcsvc_request_t *req)
{
int32_t ret = -1;
int32_t op_errno = 0;
int32_t spec_fd = -1;
size_t file_len = 0;
char filename[ZR_PATH_MAX] = {0,};
struct stat stbuf = {0,};
char *volume = NULL;
int cookie = 0;
gf_getspec_req args = {0,};
gf_getspec_rsp rsp = {0,};
if (xdr_to_glusterfs_req (req, &args, xdr_to_getspec_req)) {
//failed to decode msg;
req->rpc_err = GARBAGE_ARGS;
goto fail;
}
volume = args.key;
ret = build_volfile_path (volume, filename, sizeof (filename));
if (ret > 0) {
/* to allocate the proper buffer to hold the file data */
ret = stat (filename, &stbuf);
if (ret < 0){
gf_log ("glusterd", GF_LOG_ERROR,
"Unable to stat %s (%s)",
filename, strerror (errno));
goto fail;
}
spec_fd = open (filename, O_RDONLY);
if (spec_fd < 0) {
gf_log ("glusterd", GF_LOG_ERROR,
"Unable to open %s (%s)",
filename, strerror (errno));
goto fail;
}
ret = file_len = stbuf.st_size;
} else {
op_errno = ENOENT;
}
if (file_len) {
rsp.spec = CALLOC (file_len, sizeof (char));
if (!rsp.spec) {
ret = -1;
op_errno = ENOMEM;
goto fail;
}
ret = read (spec_fd, rsp.spec, file_len);
close (spec_fd);
}
/* convert to XDR */
fail:
rsp.op_ret = ret;
if (op_errno)
rsp.op_errno = gf_errno_to_error (op_errno);
if (cookie)
rsp.op_errno = cookie;
if (!rsp.spec)
rsp.spec = "";
glusterd_submit_reply (req, &rsp, NULL, 0, NULL,
(gd_serialize_t)xdr_serialize_getspec_rsp);
if (args.key)
free (args.key);//malloced by xdr
if (rsp.spec && (strcmp (rsp.spec, "")))
free (rsp.spec);
return 0;
}
rpcsvc_actor_t gluster_handshake_actors[] = {
[GF_HNDSK_NULL] = {"NULL", GF_HNDSK_NULL, NULL, NULL, NULL },
[GF_HNDSK_GETSPEC] = {"GETSPEC", GF_HNDSK_GETSPEC, server_getspec, NULL, NULL },
};
struct rpcsvc_program gluster_handshake_prog = {
.progname = "GlusterFS Handshake",
.prognum = GLUSTER_HNDSK_PROGRAM,
.progver = GLUSTER_HNDSK_VERSION,
.actors = gluster_handshake_actors,
.numactors = GF_HNDSK_MAXVALUE,
};
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