mirror of https://github.com/schoebel/mars
134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/*
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* MARS Long Distance Replication Software
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*
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* This file is part of MARS project: http://schoebel.github.io/mars/
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*
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* Copyright (C) 2010-2014 Thomas Schoebel-Theuer
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* Copyright (C) 2011-2014 1&1 Internet AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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//#define BRICK_DEBUGGING
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//#define MARS_DEBUGGING
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//#define IO_DEBUGGING
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include "strategy.h"
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#include "../mars_net.h"
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static
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char *_mars_translate_hostname(const char *name)
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{
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char *res = brick_strdup(name);
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char *tmp;
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char *trans;
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for (tmp = res; *tmp; tmp++) {
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if (*tmp == ':') {
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*tmp = '\0';
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break;
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}
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}
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tmp = path_make("/mars/ips/ip-%s", res);
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if (unlikely(!tmp)) {
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goto done;
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}
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trans = ordered_readlink(tmp, NULL);
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if (trans && trans[0]) {
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MARS_DBG("'%s' => '%s'\n", tmp, trans);
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brick_string_free(res);
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res = trans;
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} else {
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MARS_DBG("no translation for '%s'\n", tmp);
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brick_string_free(trans);
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}
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brick_string_free(tmp);
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done:
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return res;
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}
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int mars_send_dent_list(struct mars_socket *sock, struct list_head *anchor)
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{
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struct list_head *tmp;
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struct mars_dent *dent;
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int status = 0;
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for (tmp = anchor->next; tmp != anchor; tmp = tmp->next) {
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dent = container_of(tmp, struct mars_dent, dent_link);
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dent->d_proto = MARS_PROTO_LEVEL;
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status = mars_send_struct(sock, dent, mars_dent_meta, true);
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if (status < 0)
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break;
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}
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if (status >= 0) { // send EOR
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status = mars_send_struct(sock, NULL, mars_dent_meta, false);
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}
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return status;
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}
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EXPORT_SYMBOL_GPL(mars_send_dent_list);
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int mars_recv_dent_list(struct mars_socket *sock, struct list_head *anchor)
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{
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int status;
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for (;;) {
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struct mars_dent *dent = brick_zmem_alloc(sizeof(struct mars_dent));
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if (!dent)
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return -ENOMEM;
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//MARS_IO("\n");
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INIT_LIST_HEAD(&dent->dent_link);
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INIT_LIST_HEAD(&dent->dent_hash_link);
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INIT_LIST_HEAD(&dent->brick_list);
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status = mars_recv_struct(sock, dent, mars_dent_meta);
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if (status <= 0) {
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mars_free_dent(NULL, dent);
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goto done;
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}
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if (dent->d_proto >= 2) {
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sock->s_remote_proto_level = dent->d_proto;
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sock->s_common_proto_level = min(dent->d_proto, MARS_PROTO_LEVEL);
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}
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list_add_tail(&dent->dent_link, anchor);
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}
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done:
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return status;
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}
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EXPORT_SYMBOL_GPL(mars_recv_dent_list);
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////////////////// module init stuff /////////////////////////
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int __init init_sy_net(void)
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{
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MARS_INF("init_sy_net()\n");
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mars_translate_hostname = _mars_translate_hostname;
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return 0;
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}
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void exit_sy_net(void)
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{
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MARS_INF("exit_sy_net()\n");
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}
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