diff options
Diffstat (limited to 'net/tipc/config.c')
| -rw-r--r-- | net/tipc/config.c | 705 |
1 files changed, 705 insertions, 0 deletions
diff --git a/net/tipc/config.c b/net/tipc/config.c new file mode 100644 index 0000000..ca3544d --- /dev/null +++ b/net/tipc/config.c @@ -0,0 +1,705 @@ +/* + * net/tipc/config.c: TIPC configuration management code + * + * Copyright (c) 2002-2006, Ericsson AB + * Copyright (c) 2004-2007, Wind River Systems + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the names of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include "core.h" +#include "dbg.h" +#include "bearer.h" +#include "port.h" +#include "link.h" +#include "zone.h" +#include "addr.h" +#include "name_table.h" +#include "node.h" +#include "config.h" +#include "discover.h" + +struct subscr_data { + char usr_handle[8]; + u32 domain; + u32 port_ref; + struct list_head subd_list; +}; + +struct manager { + u32 user_ref; + u32 port_ref; + u32 subscr_ref; + u32 link_subscriptions; + struct list_head link_subscribers; +}; + +static struct manager mng = { 0}; + +static DEFINE_SPINLOCK(config_lock); + +static const void *req_tlv_area; /* request message TLV area */ +static int req_tlv_space; /* request message TLV area size */ +static int rep_headroom; /* reply message headroom to use */ + + +void tipc_cfg_link_event(u32 addr, char *name, int up) +{ + /* TIPC DOESN'T HANDLE LINK EVENT SUBSCRIPTIONS AT THE MOMENT */ +} + + +struct sk_buff *tipc_cfg_reply_alloc(int payload_size) +{ + struct sk_buff *buf; + + buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC); + if (buf) + skb_reserve(buf, rep_headroom); + return buf; +} + +int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type, + void *tlv_data, int tlv_data_size) +{ + struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(buf); + int new_tlv_space = TLV_SPACE(tlv_data_size); + + if (skb_tailroom(buf) < new_tlv_space) { + dbg("tipc_cfg_append_tlv unable to append TLV\n"); + return 0; + } + skb_put(buf, new_tlv_space); + tlv->tlv_type = htons(tlv_type); + tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size)); + if (tlv_data_size && tlv_data) + memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size); + return 1; +} + +struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value) +{ + struct sk_buff *buf; + __be32 value_net; + + buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value))); + if (buf) { + value_net = htonl(value); + tipc_cfg_append_tlv(buf, tlv_type, &value_net, + sizeof(value_net)); + } + return buf; +} + +struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string) +{ + struct sk_buff *buf; + int string_len = strlen(string) + 1; + + buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len)); + if (buf) + tipc_cfg_append_tlv(buf, tlv_type, string, string_len); + return buf; +} + + + + +#if 0 + +/* Now obsolete code for handling commands not yet implemented the new way */ + +int tipc_cfg_cmd(const struct tipc_cmd_msg * msg, + char *data, + u32 sz, + u32 *ret_size, + struct tipc_portid *orig) +{ + int rv = -EINVAL; + u32 cmd = msg->cmd; + + *ret_size = 0; + switch (cmd) { + case TIPC_REMOVE_LINK: + case TIPC_CMD_BLOCK_LINK: + case TIPC_CMD_UNBLOCK_LINK: + if (!cfg_check_connection(orig)) + rv = link_control(msg->argv.link_name, msg->cmd, 0); + break; + case TIPC_ESTABLISH: + { + int connected; + + tipc_isconnected(mng.conn_port_ref, &connected); + if (connected || !orig) { + rv = TIPC_FAILURE; + break; + } + rv = tipc_connect2port(mng.conn_port_ref, orig); + if (rv == TIPC_OK) + orig = 0; + break; + } + case TIPC_GET_PEER_ADDRESS: + *ret_size = link_peer_addr(msg->argv.link_name, data, sz); + break; + case TIPC_GET_ROUTES: + rv = TIPC_OK; + break; + default: {} + } + if (*ret_size) + rv = TIPC_OK; + return rv; +} + +static void cfg_cmd_event(struct tipc_cmd_msg *msg, + char *data, + u32 sz, + struct tipc_portid const *orig) +{ + int rv = -EINVAL; + struct tipc_cmd_result_msg rmsg; + struct iovec msg_sect[2]; + int *arg; + + msg->cmd = ntohl(msg->cmd); + + cfg_prepare_res_msg(msg->cmd, msg->usr_handle, rv, &rmsg, msg_sect, + data, 0); + if (ntohl(msg->magic) != TIPC_MAGIC) + goto exit; + + switch (msg->cmd) { + case TIPC_CREATE_LINK: + if (!cfg_check_connection(orig)) + rv = disc_create_link(&msg->argv.create_link); + break; + case TIPC_LINK_SUBSCRIBE: + { + struct subscr_data *sub; + + if (mng.link_subscriptions > 64) + break; + sub = kmalloc(sizeof(*sub), + GFP_ATOMIC); + if (sub == NULL) { + warn("Memory squeeze; dropped remote link subscription\n"); + break; + } + INIT_LIST_HEAD(&sub->subd_list); + tipc_createport(mng.user_ref, + (void *)sub, + TIPC_HIGH_IMPORTANCE, + 0, + 0, + (tipc_conn_shutdown_event)cfg_linksubscr_cancel, + 0, + 0, + (tipc_conn_msg_event)cfg_linksubscr_cancel, + 0, + &sub->port_ref); + if (!sub->port_ref) { + kfree(sub); + break; + } + memcpy(sub->usr_handle,msg->usr_handle, + sizeof(sub->usr_handle)); + sub->domain = msg->argv.domain; + list_add_tail(&sub->subd_list, &mng.link_subscribers); + tipc_connect2port(sub->port_ref, orig); + rmsg.retval = TIPC_OK; + tipc_send(sub->port_ref, 2u, msg_sect); + mng.link_subscriptions++; + return; + } + default: + rv = tipc_cfg_cmd(msg, data, sz, (u32 *)&msg_sect[1].iov_len, orig); + } + exit: + rmsg.result_len = htonl(msg_sect[1].iov_len); + rmsg.retval = htonl(rv); + tipc_cfg_respond(msg_sect, 2u, orig); +} +#endif + +static struct sk_buff *cfg_enable_bearer(void) +{ + struct tipc_bearer_config *args; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + + args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area); + if (tipc_enable_bearer(args->name, + ntohl(args->detect_scope), + ntohl(args->priority))) + return tipc_cfg_reply_error_string("unable to enable bearer"); + + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_disable_bearer(void) +{ + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + + if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area))) + return tipc_cfg_reply_error_string("unable to disable bearer"); + + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_set_own_addr(void) +{ + u32 addr; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + + addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); + if (addr == tipc_own_addr) + return tipc_cfg_reply_none(); + if (!tipc_addr_node_valid(addr)) + return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE + " (node address)"); + if (tipc_mode == TIPC_NET_MODE) + return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED + " (cannot change node address once assigned)"); + + /* + * Must release all spinlocks before calling start_net() because + * Linux version of TIPC calls eth_media_start() which calls + * register_netdevice_notifier() which may block! + * + * Temporarily releasing the lock should be harmless for non-Linux TIPC, + * but Linux version of eth_media_start() should really be reworked + * so that it can be called with spinlocks held. + */ + + spin_unlock_bh(&config_lock); + tipc_core_start_net(addr); + spin_lock_bh(&config_lock); + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_set_remote_mng(void) +{ + u32 value; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + + value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); + tipc_remote_management = (value != 0); + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_set_max_publications(void) +{ + u32 value; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + + value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); + if (value != delimit(value, 1, 65535)) + return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE + " (max publications must be 1-65535)"); + tipc_max_publications = value; + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_set_max_subscriptions(void) +{ + u32 value; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + + value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); + if (value != delimit(value, 1, 65535)) + return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE + " (max subscriptions must be 1-65535"); + tipc_max_subscriptions = value; + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_set_max_ports(void) +{ + u32 value; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); + if (value == tipc_max_ports) + return tipc_cfg_reply_none(); + if (value != delimit(value, 127, 65535)) + return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE + " (max ports must be 127-65535)"); + if (tipc_mode != TIPC_NOT_RUNNING) + return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED + " (cannot change max ports while TIPC is active)"); + tipc_max_ports = value; + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_set_max_zones(void) +{ + u32 value; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); + if (value == tipc_max_zones) + return tipc_cfg_reply_none(); + if (value != delimit(value, 1, 255)) + return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE + " (max zones must be 1-255)"); + if (tipc_mode == TIPC_NET_MODE) + return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED + " (cannot change max zones once TIPC has joined a network)"); + tipc_max_zones = value; + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_set_max_clusters(void) +{ + u32 value; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); + if (value != delimit(value, 1, 1)) + return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE + " (max clusters fixed at 1)"); + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_set_max_nodes(void) +{ + u32 value; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); + if (value == tipc_max_nodes) + return tipc_cfg_reply_none(); + if (value != delimit(value, 8, 2047)) + return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE + " (max nodes must be 8-2047)"); + if (tipc_mode == TIPC_NET_MODE) + return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED + " (cannot change max nodes once TIPC has joined a network)"); + tipc_max_nodes = value; + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_set_max_slaves(void) +{ + u32 value; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); + if (value != 0) + return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED + " (max secondary nodes fixed at 0)"); + return tipc_cfg_reply_none(); +} + +static struct sk_buff *cfg_set_netid(void) +{ + u32 value; + + if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) + return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); + value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); + if (value == tipc_net_id) + return tipc_cfg_reply_none(); + if (value != delimit(value, 1, 9999)) + return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE + " (network id must be 1-9999)"); + if (tipc_mode == TIPC_NET_MODE) + return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED + " (cannot change network id once TIPC has joined a network)"); + tipc_net_id = value; + return tipc_cfg_reply_none(); +} + +struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area, + int request_space, int reply_headroom) +{ + struct sk_buff *rep_tlv_buf; + + spin_lock_bh(&config_lock); + + /* Save request and reply details in a well-known location */ + + req_tlv_area = request_area; + req_tlv_space = request_space; + rep_headroom = reply_headroom; + + /* Check command authorization */ + + if (likely(orig_node == tipc_own_addr)) { + /* command is permitted */ + } else if (cmd >= 0x8000) { + rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED + " (cannot be done remotely)"); + goto exit; + } else if (!tipc_remote_management) { + rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NO_REMOTE); + goto exit; + } + else if (cmd >= 0x4000) { + u32 domain = 0; + + if ((tipc_nametbl_translate(TIPC_ZM_SRV, 0, &domain) == 0) || + (domain != orig_node)) { + rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_ZONE_MSTR); + goto exit; + } + } + + /* Call appropriate processing routine */ + + switch (cmd) { + case TIPC_CMD_NOOP: + rep_tlv_buf = tipc_cfg_reply_none(); + break; + case TIPC_CMD_GET_NODES: + rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space); + break; + case TIPC_CMD_GET_LINKS: + rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space); + break; + case TIPC_CMD_SHOW_LINK_STATS: + rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space); + break; + case TIPC_CMD_RESET_LINK_STATS: + rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space); + break; + case TIPC_CMD_SHOW_NAME_TABLE: + rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space); + break; + case TIPC_CMD_GET_BEARER_NAMES: + rep_tlv_buf = tipc_bearer_get_names(); + break; + case TIPC_CMD_GET_MEDIA_NAMES: + rep_tlv_buf = tipc_media_get_names(); + break; + case TIPC_CMD_SHOW_PORTS: + rep_tlv_buf = tipc_port_get_ports(); + break; +#if 0 + case TIPC_CMD_SHOW_PORT_STATS: + rep_tlv_buf = port_show_stats(req_tlv_area, req_tlv_space); + break; + case TIPC_CMD_RESET_PORT_STATS: + rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED); + break; +#endif + case TIPC_CMD_SET_LOG_SIZE: + rep_tlv_buf = tipc_log_resize_cmd(req_tlv_area, req_tlv_space); + break; + case TIPC_CMD_DUMP_LOG: + rep_tlv_buf = tipc_log_dump(); + break; + case TIPC_CMD_SET_LINK_TOL: + case TIPC_CMD_SET_LINK_PRI: + case TIPC_CMD_SET_LINK_WINDOW: + rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd); + break; + case TIPC_CMD_ENABLE_BEARER: + rep_tlv_buf = cfg_enable_bearer(); + break; + case TIPC_CMD_DISABLE_BEARER: + rep_tlv_buf = cfg_disable_bearer(); + break; + case TIPC_CMD_SET_NODE_ADDR: + rep_tlv_buf = cfg_set_own_addr(); + break; + case TIPC_CMD_SET_REMOTE_MNG: + rep_tlv_buf = cfg_set_remote_mng(); + break; + case TIPC_CMD_SET_MAX_PORTS: + rep_tlv_buf = cfg_set_max_ports(); + break; + case TIPC_CMD_SET_MAX_PUBL: + rep_tlv_buf = cfg_set_max_publications(); + break; + case TIPC_CMD_SET_MAX_SUBSCR: + rep_tlv_buf = cfg_set_max_subscriptions(); + break; + case TIPC_CMD_SET_MAX_ZONES: + rep_tlv_buf = cfg_set_max_zones(); + break; + case TIPC_CMD_SET_MAX_CLUSTERS: + rep_tlv_buf = cfg_set_max_clusters(); + break; + case TIPC_CMD_SET_MAX_NODES: + rep_tlv_buf = cfg_set_max_nodes(); + break; + case TIPC_CMD_SET_MAX_SLAVES: + rep_tlv_buf = cfg_set_max_slaves(); + break; + case TIPC_CMD_SET_NETID: + rep_tlv_buf = cfg_set_netid(); + break; + case TIPC_CMD_GET_REMOTE_MNG: + rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_remote_management); + break; + case TIPC_CMD_GET_MAX_PORTS: + rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports); + break; + case TIPC_CMD_GET_MAX_PUBL: + rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_publications); + break; + case TIPC_CMD_GET_MAX_SUBSCR: + rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_subscriptions); + break; + case TIPC_CMD_GET_MAX_ZONES: + rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_zones); + break; + case TIPC_CMD_GET_MAX_CLUSTERS: + rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_clusters); + break; + case TIPC_CMD_GET_MAX_NODES: + rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_nodes); + break; + case TIPC_CMD_GET_MAX_SLAVES: + rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_slaves); + break; + case TIPC_CMD_GET_NETID: + rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id); + break; + case TIPC_CMD_NOT_NET_ADMIN: + rep_tlv_buf = + tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN); + break; + default: + rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED + " (unknown command)"); + break; + } + + /* Return reply buffer */ +exit: + spin_unlock_bh(&config_lock); + return rep_tlv_buf; +} + +static void cfg_named_msg_event(void *userdata, + u32 port_ref, + struct sk_buff **buf, + const unchar *msg, + u32 size, + u32 importance, + struct tipc_portid const *orig, + struct tipc_name_seq const *dest) +{ + struct tipc_cfg_msg_hdr *req_hdr; + struct tipc_cfg_msg_hdr *rep_hdr; + struct sk_buff *rep_buf; + + /* Validate configuration message header (ignore invalid message) */ + + req_hdr = (struct tipc_cfg_msg_hdr *)msg; + if ((size < sizeof(*req_hdr)) || + (size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) || + (ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) { + warn("Invalid configuration message discarded\n"); + return; + } + + /* Generate reply for request (if can't, return request) */ + + rep_buf = tipc_cfg_do_cmd(orig->node, + ntohs(req_hdr->tcm_type), + msg + sizeof(*req_hdr), + size - sizeof(*req_hdr), + BUF_HEADROOM + MAX_H_SIZE + sizeof(*rep_hdr)); + if (rep_buf) { + skb_push(rep_buf, sizeof(*rep_hdr)); + rep_hdr = (struct tipc_cfg_msg_hdr *)rep_buf->data; + memcpy(rep_hdr, req_hdr, sizeof(*rep_hdr)); + rep_hdr->tcm_len = htonl(rep_buf->len); + rep_hdr->tcm_flags &= htons(~TCM_F_REQUEST); + } else { + rep_buf = *buf; + *buf = NULL; + } + + /* NEED TO ADD CODE TO HANDLE FAILED SEND (SUCH AS CONGESTION) */ + tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len); +} + +int tipc_cfg_init(void) +{ + struct tipc_name_seq seq; + int res; + + memset(&mng, 0, sizeof(mng)); + INIT_LIST_HEAD(&mng.link_subscribers); + + res = tipc_attach(&mng.user_ref, NULL, NULL); + if (res) + goto failed; + + res = tipc_createport(mng.user_ref, NULL, TIPC_CRITICAL_IMPORTANCE, + NULL, NULL, NULL, + NULL, cfg_named_msg_event, NULL, + NULL, &mng.port_ref); + if (res) + goto failed; + + seq.type = TIPC_CFG_SRV; + seq.lower = seq.upper = tipc_own_addr; + res = tipc_nametbl_publish_rsv(mng.port_ref, TIPC_ZONE_SCOPE, &seq); + if (res) + goto failed; + + return 0; + +failed: + err("Unable to create configuration service\n"); + tipc_detach(mng.user_ref); + mng.user_ref = 0; + return res; +} + +void tipc_cfg_stop(void) +{ + if (mng.user_ref) { + tipc_detach(mng.user_ref); + mng.user_ref = 0; + } +} |
