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258ce91f31
genrand.c will require it soon Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
1316 lines
30 KiB
C
1316 lines
30 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba internal messaging functions
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Copyright (C) 2007 by Volker Lendecke
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Copyright (C) 2007 by Andrew Tridgell
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "util_tdb.h"
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#include "serverid.h"
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#include "ctdbd_conn.h"
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#include "system/select.h"
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#include "lib/util/sys_rw_data.h"
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#include "lib/util/iov_buf.h"
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#include "messages.h"
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/* paths to these include files come from --with-ctdb= in configure */
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#include "ctdb.h"
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#include "ctdb_private.h"
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struct ctdbd_srvid_cb {
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uint64_t srvid;
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int (*cb)(uint32_t src_vnn, uint32_t dst_vnn,
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uint64_t dst_srvid,
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const uint8_t *msg, size_t msglen,
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void *private_data);
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void *private_data;
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};
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struct ctdbd_connection {
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const char *sockname; /* Needed in ctdbd_traverse */
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struct messaging_context *msg_ctx;
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uint32_t reqid;
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uint32_t our_vnn;
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uint64_t rand_srvid;
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struct ctdbd_srvid_cb *callbacks;
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int fd;
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struct tevent_fd *fde;
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int timeout;
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};
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static uint32_t ctdbd_next_reqid(struct ctdbd_connection *conn)
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{
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conn->reqid += 1;
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if (conn->reqid == 0) {
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conn->reqid += 1;
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}
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return conn->reqid;
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}
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static int ctdbd_control(struct ctdbd_connection *conn,
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uint32_t vnn, uint32_t opcode,
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uint64_t srvid, uint32_t flags,
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TDB_DATA data,
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TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
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int *cstatus);
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/*
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* exit on fatal communications errors with the ctdbd daemon
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*/
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static void cluster_fatal(const char *why)
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{
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DEBUG(0,("cluster fatal event: %s - exiting immediately\n", why));
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/* we don't use smb_panic() as we don't want to delay to write
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a core file. We need to release this process id immediately
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so that someone else can take over without getting sharing
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violations */
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_exit(1);
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}
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/*
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*
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*/
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static void ctdb_packet_dump(struct ctdb_req_header *hdr)
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{
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if (DEBUGLEVEL < 11) {
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return;
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}
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DEBUGADD(11, ("len=%d, magic=%x, vers=%d, gen=%d, op=%d, reqid=%d\n",
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(int)hdr->length, (int)hdr->ctdb_magic,
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(int)hdr->ctdb_version, (int)hdr->generation,
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(int)hdr->operation, (int)hdr->reqid));
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}
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/*
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* Register a srvid with ctdbd
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*/
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int register_with_ctdbd(struct ctdbd_connection *conn, uint64_t srvid,
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int (*cb)(uint32_t src_vnn, uint32_t dst_vnn,
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uint64_t dst_srvid,
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const uint8_t *msg, size_t msglen,
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void *private_data),
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void *private_data)
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{
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int ret, cstatus;
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size_t num_callbacks;
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struct ctdbd_srvid_cb *tmp;
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ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
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CTDB_CONTROL_REGISTER_SRVID, srvid, 0,
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tdb_null, NULL, NULL, &cstatus);
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if (ret != 0) {
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return ret;
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}
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num_callbacks = talloc_array_length(conn->callbacks);
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tmp = talloc_realloc(conn, conn->callbacks, struct ctdbd_srvid_cb,
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num_callbacks + 1);
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if (tmp == NULL) {
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return ENOMEM;
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}
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conn->callbacks = tmp;
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conn->callbacks[num_callbacks] = (struct ctdbd_srvid_cb) {
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.srvid = srvid, .cb = cb, .private_data = private_data
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};
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return 0;
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}
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static int ctdbd_msg_call_back(struct ctdbd_connection *conn,
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struct ctdb_req_message *msg)
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{
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size_t msg_len;
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size_t i, num_callbacks;
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msg_len = msg->hdr.length;
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if (msg_len < offsetof(struct ctdb_req_message, data)) {
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DEBUG(10, ("%s: len %u too small\n", __func__,
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(unsigned)msg_len));
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return 0;
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}
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msg_len -= offsetof(struct ctdb_req_message, data);
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if (msg_len < msg->datalen) {
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DEBUG(10, ("%s: msg_len=%u < msg->datalen=%u\n", __func__,
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(unsigned)msg_len, (unsigned)msg->datalen));
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return 0;
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}
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num_callbacks = talloc_array_length(conn->callbacks);
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for (i=0; i<num_callbacks; i++) {
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struct ctdbd_srvid_cb *cb = &conn->callbacks[i];
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if ((cb->srvid == msg->srvid) && (cb->cb != NULL)) {
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int ret;
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ret = cb->cb(msg->hdr.srcnode, msg->hdr.destnode,
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msg->srvid, msg->data, msg->datalen,
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cb->private_data);
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if (ret != 0) {
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return ret;
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}
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}
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}
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return 0;
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}
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/*
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* get our vnn from the cluster
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*/
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static int get_cluster_vnn(struct ctdbd_connection *conn, uint32_t *vnn)
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{
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int32_t cstatus=-1;
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int ret;
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ret = ctdbd_control(conn,
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CTDB_CURRENT_NODE, CTDB_CONTROL_GET_PNN, 0, 0,
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tdb_null, NULL, NULL, &cstatus);
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if (ret != 0) {
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DEBUG(1, ("ctdbd_control failed: %s\n", strerror(ret)));
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return ret;
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}
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*vnn = (uint32_t)cstatus;
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return ret;
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}
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/*
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* Are we active (i.e. not banned or stopped?)
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*/
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static bool ctdbd_working(struct ctdbd_connection *conn, uint32_t vnn)
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{
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int32_t cstatus=-1;
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TDB_DATA outdata;
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struct ctdb_node_map *m;
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uint32_t failure_flags;
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bool ok = false;
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int i, ret;
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ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
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CTDB_CONTROL_GET_NODEMAP, 0, 0,
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tdb_null, talloc_tos(), &outdata, &cstatus);
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if (ret != 0) {
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DEBUG(1, ("ctdbd_control failed: %s\n", strerror(ret)));
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return false;
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}
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if ((cstatus != 0) || (outdata.dptr == NULL)) {
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DEBUG(2, ("Received invalid ctdb data\n"));
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return false;
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}
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m = (struct ctdb_node_map *)outdata.dptr;
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for (i=0; i<m->num; i++) {
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if (vnn == m->nodes[i].pnn) {
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break;
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}
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}
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if (i == m->num) {
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DEBUG(2, ("Did not find ourselves (node %d) in nodemap\n",
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(int)vnn));
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goto fail;
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}
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failure_flags = NODE_FLAGS_BANNED | NODE_FLAGS_DISCONNECTED
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| NODE_FLAGS_PERMANENTLY_DISABLED | NODE_FLAGS_STOPPED;
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if ((m->nodes[i].flags & failure_flags) != 0) {
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DEBUG(2, ("Node has status %x, not active\n",
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(int)m->nodes[i].flags));
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goto fail;
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}
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ok = true;
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fail:
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TALLOC_FREE(outdata.dptr);
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return ok;
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}
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uint32_t ctdbd_vnn(const struct ctdbd_connection *conn)
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{
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return conn->our_vnn;
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}
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/*
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* Get us a ctdb connection
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*/
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static int ctdbd_connect(const char *sockname, int *pfd)
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{
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struct sockaddr_un addr = { 0, };
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int fd;
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socklen_t salen;
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size_t namelen;
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fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd == -1) {
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int err = errno;
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DEBUG(3, ("Could not create socket: %s\n", strerror(err)));
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return err;
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}
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addr.sun_family = AF_UNIX;
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namelen = strlcpy(addr.sun_path, sockname, sizeof(addr.sun_path));
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if (namelen >= sizeof(addr.sun_path)) {
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DEBUG(3, ("%s: Socket name too long: %s\n", __func__,
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sockname));
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close(fd);
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return ENAMETOOLONG;
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}
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salen = sizeof(struct sockaddr_un);
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if (connect(fd, (struct sockaddr *)(void *)&addr, salen) == -1) {
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int err = errno;
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DEBUG(1, ("connect(%s) failed: %s\n", sockname,
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strerror(err)));
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close(fd);
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return err;
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}
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*pfd = fd;
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return 0;
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}
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static int ctdb_read_packet(int fd, int timeout, TALLOC_CTX *mem_ctx,
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struct ctdb_req_header **result)
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{
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struct ctdb_req_header *req;
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int ret, revents;
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uint32_t msglen;
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ssize_t nread;
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if (timeout != -1) {
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ret = poll_intr_one_fd(fd, POLLIN, timeout, &revents);
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if (ret == -1) {
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return errno;
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}
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if (ret == 0) {
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return ETIMEDOUT;
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}
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if (ret != 1) {
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return EIO;
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}
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}
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nread = read_data(fd, &msglen, sizeof(msglen));
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if (nread == -1) {
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return errno;
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}
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if (nread == 0) {
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return EIO;
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}
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if (msglen < sizeof(struct ctdb_req_header)) {
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return EIO;
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}
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req = talloc_size(mem_ctx, msglen);
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if (req == NULL) {
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return ENOMEM;
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}
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talloc_set_name_const(req, "struct ctdb_req_header");
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req->length = msglen;
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nread = read_data(fd, ((char *)req) + sizeof(msglen),
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msglen - sizeof(msglen));
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if (nread == -1) {
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TALLOC_FREE(req);
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return errno;
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}
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if (nread == 0) {
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TALLOC_FREE(req);
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return EIO;
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}
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*result = req;
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return 0;
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}
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/*
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* Read a full ctdbd request. If we have a messaging context, defer incoming
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* messages that might come in between.
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*/
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static int ctdb_read_req(struct ctdbd_connection *conn, uint32_t reqid,
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TALLOC_CTX *mem_ctx, struct ctdb_req_header **result)
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{
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struct ctdb_req_header *hdr;
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int ret;
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next_pkt:
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ret = ctdb_read_packet(conn->fd, conn->timeout, mem_ctx, &hdr);
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if (ret != 0) {
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DEBUG(0, ("ctdb_read_packet failed: %s\n", strerror(ret)));
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cluster_fatal("ctdbd died\n");
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}
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DEBUG(11, ("Received ctdb packet\n"));
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ctdb_packet_dump(hdr);
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if (hdr->operation == CTDB_REQ_MESSAGE) {
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struct ctdb_req_message *msg = (struct ctdb_req_message *)hdr;
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|
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if (conn->msg_ctx == NULL) {
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DEBUG(1, ("Got a message without having a msg ctx, "
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"dropping msg %llu\n",
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(long long unsigned)msg->srvid));
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TALLOC_FREE(hdr);
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goto next_pkt;
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}
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ret = ctdbd_msg_call_back(conn, msg);
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if (ret != 0) {
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TALLOC_FREE(hdr);
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return ret;
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}
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|
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TALLOC_FREE(hdr);
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goto next_pkt;
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}
|
|
|
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if ((reqid != 0) && (hdr->reqid != reqid)) {
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/* we got the wrong reply */
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DEBUG(0,("Discarding mismatched ctdb reqid %u should have "
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"been %u\n", hdr->reqid, reqid));
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TALLOC_FREE(hdr);
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goto next_pkt;
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}
|
|
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*result = talloc_move(mem_ctx, &hdr);
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|
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return 0;
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}
|
|
|
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static int ctdbd_connection_destructor(struct ctdbd_connection *c)
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{
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TALLOC_FREE(c->fde);
|
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if (c->fd != -1) {
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close(c->fd);
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c->fd = -1;
|
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}
|
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return 0;
|
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}
|
|
/*
|
|
* Get us a ctdbd connection
|
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*/
|
|
|
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static int ctdbd_init_connection(TALLOC_CTX *mem_ctx,
|
|
const char *sockname, int timeout,
|
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struct ctdbd_connection **pconn)
|
|
{
|
|
struct ctdbd_connection *conn;
|
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int ret;
|
|
|
|
if (!(conn = talloc_zero(mem_ctx, struct ctdbd_connection))) {
|
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DEBUG(0, ("talloc failed\n"));
|
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return ENOMEM;
|
|
}
|
|
|
|
conn->sockname = talloc_strdup(conn, sockname);
|
|
if (conn->sockname == NULL) {
|
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DBG_ERR("%s: talloc failed\n", __func__);
|
|
ret = ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
conn->timeout = timeout;
|
|
|
|
if (conn->timeout == 0) {
|
|
conn->timeout = -1;
|
|
}
|
|
|
|
ret = ctdbd_connect(conn->sockname, &conn->fd);
|
|
if (ret != 0) {
|
|
DEBUG(1, ("ctdbd_connect failed: %s\n", strerror(ret)));
|
|
goto fail;
|
|
}
|
|
talloc_set_destructor(conn, ctdbd_connection_destructor);
|
|
|
|
ret = get_cluster_vnn(conn, &conn->our_vnn);
|
|
|
|
if (ret != 0) {
|
|
DEBUG(10, ("get_cluster_vnn failed: %s\n", strerror(ret)));
|
|
goto fail;
|
|
}
|
|
|
|
if (!ctdbd_working(conn, conn->our_vnn)) {
|
|
DEBUG(2, ("Node is not working, can not connect\n"));
|
|
ret = EIO;
|
|
goto fail;
|
|
}
|
|
|
|
generate_random_buffer((unsigned char *)&conn->rand_srvid,
|
|
sizeof(conn->rand_srvid));
|
|
|
|
ret = register_with_ctdbd(conn, conn->rand_srvid, NULL, NULL);
|
|
|
|
if (ret != 0) {
|
|
DEBUG(5, ("Could not register random srvid: %s\n",
|
|
strerror(ret)));
|
|
goto fail;
|
|
}
|
|
|
|
*pconn = conn;
|
|
return 0;
|
|
|
|
fail:
|
|
TALLOC_FREE(conn);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Get us a ctdbd connection and register us as a process
|
|
*/
|
|
|
|
int ctdbd_messaging_connection(TALLOC_CTX *mem_ctx,
|
|
const char *sockname, int timeout,
|
|
struct ctdbd_connection **pconn)
|
|
{
|
|
struct ctdbd_connection *conn;
|
|
int ret;
|
|
|
|
ret = ctdbd_init_connection(mem_ctx, sockname, timeout, &conn);
|
|
|
|
if (ret != 0) {
|
|
return ret;
|
|
}
|
|
|
|
ret = register_with_ctdbd(conn, MSG_SRVID_SAMBA, NULL, NULL);
|
|
if (ret != 0) {
|
|
goto fail;
|
|
}
|
|
|
|
*pconn = conn;
|
|
return 0;
|
|
|
|
fail:
|
|
TALLOC_FREE(conn);
|
|
return ret;
|
|
}
|
|
|
|
struct messaging_context *ctdb_conn_msg_ctx(struct ctdbd_connection *conn)
|
|
{
|
|
return conn->msg_ctx;
|
|
}
|
|
|
|
int ctdbd_conn_get_fd(struct ctdbd_connection *conn)
|
|
{
|
|
return conn->fd;
|
|
}
|
|
|
|
/*
|
|
* Packet handler to receive and handle a ctdb message
|
|
*/
|
|
static int ctdb_handle_message(struct ctdbd_connection *conn,
|
|
struct ctdb_req_header *hdr)
|
|
{
|
|
struct ctdb_req_message *msg;
|
|
|
|
if (hdr->operation != CTDB_REQ_MESSAGE) {
|
|
DEBUG(0, ("Received async msg of type %u, discarding\n",
|
|
hdr->operation));
|
|
return EINVAL;
|
|
}
|
|
|
|
msg = (struct ctdb_req_message *)hdr;
|
|
|
|
ctdbd_msg_call_back(conn, msg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The ctdbd socket is readable asynchronuously
|
|
*/
|
|
|
|
static void ctdbd_socket_handler(struct tevent_context *event_ctx,
|
|
struct tevent_fd *event,
|
|
uint16_t flags,
|
|
void *private_data)
|
|
{
|
|
struct ctdbd_connection *conn = talloc_get_type_abort(
|
|
private_data, struct ctdbd_connection);
|
|
struct ctdb_req_header *hdr = NULL;
|
|
int ret;
|
|
|
|
ret = ctdb_read_packet(conn->fd, conn->timeout, talloc_tos(), &hdr);
|
|
if (ret != 0) {
|
|
DEBUG(0, ("ctdb_read_packet failed: %s\n", strerror(ret)));
|
|
cluster_fatal("ctdbd died\n");
|
|
}
|
|
|
|
ret = ctdb_handle_message(conn, hdr);
|
|
|
|
TALLOC_FREE(hdr);
|
|
|
|
if (ret != 0) {
|
|
DEBUG(10, ("could not handle incoming message: %s\n",
|
|
strerror(ret)));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Prepare a ctdbd connection to receive messages
|
|
*/
|
|
|
|
int ctdbd_register_msg_ctx(struct ctdbd_connection *conn,
|
|
struct messaging_context *msg_ctx,
|
|
struct tevent_context *ev)
|
|
{
|
|
SMB_ASSERT(conn->msg_ctx == NULL);
|
|
SMB_ASSERT(conn->fde == NULL);
|
|
|
|
conn->fde = tevent_add_fd(ev, conn, conn->fd, TEVENT_FD_READ,
|
|
ctdbd_socket_handler, conn);
|
|
if (conn->fde == NULL) {
|
|
DEBUG(0, ("event_add_fd failed\n"));
|
|
return ENOMEM;
|
|
}
|
|
|
|
conn->msg_ctx = msg_ctx;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ctdbd_messaging_send_iov(struct ctdbd_connection *conn,
|
|
uint32_t dst_vnn, uint64_t dst_srvid,
|
|
const struct iovec *iov, int iovlen)
|
|
{
|
|
struct ctdb_req_message r;
|
|
struct iovec iov2[iovlen+1];
|
|
size_t buflen = iov_buflen(iov, iovlen);
|
|
ssize_t nwritten;
|
|
|
|
r.hdr.length = offsetof(struct ctdb_req_message, data) + buflen;
|
|
r.hdr.ctdb_magic = CTDB_MAGIC;
|
|
r.hdr.ctdb_version = CTDB_PROTOCOL;
|
|
r.hdr.generation = 1;
|
|
r.hdr.operation = CTDB_REQ_MESSAGE;
|
|
r.hdr.destnode = dst_vnn;
|
|
r.hdr.srcnode = conn->our_vnn;
|
|
r.hdr.reqid = 0;
|
|
r.srvid = dst_srvid;
|
|
r.datalen = buflen;
|
|
|
|
DEBUG(10, ("ctdbd_messaging_send: Sending ctdb packet\n"));
|
|
ctdb_packet_dump(&r.hdr);
|
|
|
|
iov2[0].iov_base = &r;
|
|
iov2[0].iov_len = offsetof(struct ctdb_req_message, data);
|
|
memcpy(&iov2[1], iov, iovlen * sizeof(struct iovec));
|
|
|
|
nwritten = write_data_iov(conn->fd, iov2, iovlen+1);
|
|
if (nwritten == -1) {
|
|
DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
|
|
cluster_fatal("cluster dispatch daemon msg write error\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* send/recv a generic ctdb control message
|
|
*/
|
|
static int ctdbd_control(struct ctdbd_connection *conn,
|
|
uint32_t vnn, uint32_t opcode,
|
|
uint64_t srvid, uint32_t flags,
|
|
TDB_DATA data,
|
|
TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
|
|
int *cstatus)
|
|
{
|
|
struct ctdb_req_control req;
|
|
struct ctdb_req_header *hdr;
|
|
struct ctdb_reply_control *reply = NULL;
|
|
struct iovec iov[2];
|
|
ssize_t nwritten;
|
|
int ret;
|
|
|
|
ZERO_STRUCT(req);
|
|
req.hdr.length = offsetof(struct ctdb_req_control, data) + data.dsize;
|
|
req.hdr.ctdb_magic = CTDB_MAGIC;
|
|
req.hdr.ctdb_version = CTDB_PROTOCOL;
|
|
req.hdr.operation = CTDB_REQ_CONTROL;
|
|
req.hdr.reqid = ctdbd_next_reqid(conn);
|
|
req.hdr.destnode = vnn;
|
|
req.opcode = opcode;
|
|
req.srvid = srvid;
|
|
req.datalen = data.dsize;
|
|
req.flags = flags;
|
|
|
|
DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
|
|
ctdb_packet_dump(&req.hdr);
|
|
|
|
iov[0].iov_base = &req;
|
|
iov[0].iov_len = offsetof(struct ctdb_req_control, data);
|
|
iov[1].iov_base = data.dptr;
|
|
iov[1].iov_len = data.dsize;
|
|
|
|
nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
|
|
if (nwritten == -1) {
|
|
DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
|
|
cluster_fatal("cluster dispatch daemon msg write error\n");
|
|
}
|
|
|
|
if (flags & CTDB_CTRL_FLAG_NOREPLY) {
|
|
if (cstatus) {
|
|
*cstatus = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
ret = ctdb_read_req(conn, req.hdr.reqid, NULL, &hdr);
|
|
if (ret != 0) {
|
|
DEBUG(10, ("ctdb_read_req failed: %s\n", strerror(ret)));
|
|
return ret;
|
|
}
|
|
|
|
if (hdr->operation != CTDB_REPLY_CONTROL) {
|
|
DEBUG(0, ("received invalid reply\n"));
|
|
TALLOC_FREE(hdr);
|
|
return EIO;
|
|
}
|
|
reply = (struct ctdb_reply_control *)hdr;
|
|
|
|
if (outdata) {
|
|
if (!(outdata->dptr = (uint8_t *)talloc_memdup(
|
|
mem_ctx, reply->data, reply->datalen))) {
|
|
TALLOC_FREE(reply);
|
|
return ENOMEM;
|
|
}
|
|
outdata->dsize = reply->datalen;
|
|
}
|
|
if (cstatus) {
|
|
(*cstatus) = reply->status;
|
|
}
|
|
|
|
TALLOC_FREE(reply);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* see if a remote process exists
|
|
*/
|
|
bool ctdbd_process_exists(struct ctdbd_connection *conn, uint32_t vnn, pid_t pid)
|
|
{
|
|
struct server_id id;
|
|
bool result;
|
|
|
|
id.pid = pid;
|
|
id.vnn = vnn;
|
|
|
|
if (!ctdb_processes_exist(conn, &id, 1, &result)) {
|
|
DEBUG(10, ("ctdb_processes_exist failed\n"));
|
|
return false;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
bool ctdb_processes_exist(struct ctdbd_connection *conn,
|
|
const struct server_id *pids, int num_pids,
|
|
bool *results)
|
|
{
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
int i, num_received;
|
|
uint32_t *reqids;
|
|
bool result = false;
|
|
|
|
reqids = talloc_array(talloc_tos(), uint32_t, num_pids);
|
|
if (reqids == NULL) {
|
|
goto fail;
|
|
}
|
|
|
|
for (i=0; i<num_pids; i++) {
|
|
struct ctdb_req_control req;
|
|
pid_t pid;
|
|
struct iovec iov[2];
|
|
ssize_t nwritten;
|
|
|
|
results[i] = false;
|
|
reqids[i] = ctdbd_next_reqid(conn);
|
|
|
|
ZERO_STRUCT(req);
|
|
|
|
/*
|
|
* pids[i].pid is uint64_t, scale down to pid_t which
|
|
* is the wire protocol towards ctdb.
|
|
*/
|
|
pid = pids[i].pid;
|
|
|
|
DEBUG(10, ("Requesting PID %d/%d, reqid=%d\n",
|
|
(int)pids[i].vnn, (int)pid,
|
|
(int)reqids[i]));
|
|
|
|
req.hdr.length = offsetof(struct ctdb_req_control, data);
|
|
req.hdr.length += sizeof(pid);
|
|
req.hdr.ctdb_magic = CTDB_MAGIC;
|
|
req.hdr.ctdb_version = CTDB_PROTOCOL;
|
|
req.hdr.operation = CTDB_REQ_CONTROL;
|
|
req.hdr.reqid = reqids[i];
|
|
req.hdr.destnode = pids[i].vnn;
|
|
req.opcode = CTDB_CONTROL_PROCESS_EXISTS;
|
|
req.srvid = 0;
|
|
req.datalen = sizeof(pid);
|
|
req.flags = 0;
|
|
|
|
DEBUG(10, ("ctdbd_control: Sending ctdb packet\n"));
|
|
ctdb_packet_dump(&req.hdr);
|
|
|
|
iov[0].iov_base = &req;
|
|
iov[0].iov_len = offsetof(struct ctdb_req_control, data);
|
|
iov[1].iov_base = &pid;
|
|
iov[1].iov_len = sizeof(pid);
|
|
|
|
nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
|
|
if (nwritten == -1) {
|
|
DEBUG(10, ("write_data_iov failed: %s\n",
|
|
strerror(errno)));
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
num_received = 0;
|
|
|
|
while (num_received < num_pids) {
|
|
struct ctdb_req_header *hdr;
|
|
struct ctdb_reply_control *reply;
|
|
uint32_t reqid;
|
|
int ret;
|
|
|
|
ret = ctdb_read_req(conn, 0, talloc_tos(), &hdr);
|
|
if (ret != 0) {
|
|
DEBUG(10, ("ctdb_read_req failed: %s\n",
|
|
strerror(ret)));
|
|
goto fail;
|
|
}
|
|
|
|
if (hdr->operation != CTDB_REPLY_CONTROL) {
|
|
DEBUG(10, ("Received invalid reply\n"));
|
|
goto fail;
|
|
}
|
|
reply = (struct ctdb_reply_control *)hdr;
|
|
|
|
reqid = reply->hdr.reqid;
|
|
|
|
DEBUG(10, ("Received reqid %d\n", (int)reqid));
|
|
|
|
for (i=0; i<num_pids; i++) {
|
|
if (reqid == reqids[i]) {
|
|
break;
|
|
}
|
|
}
|
|
if (i == num_pids) {
|
|
DEBUG(10, ("Received unknown record number %u\n",
|
|
(unsigned)reqid));
|
|
goto fail;
|
|
}
|
|
results[i] = ((reply->status) == 0);
|
|
TALLOC_FREE(reply);
|
|
num_received += 1;
|
|
}
|
|
|
|
result = true;
|
|
fail:
|
|
TALLOC_FREE(frame);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Get a db path
|
|
*/
|
|
char *ctdbd_dbpath(struct ctdbd_connection *conn,
|
|
TALLOC_CTX *mem_ctx, uint32_t db_id)
|
|
{
|
|
int ret;
|
|
TDB_DATA data;
|
|
TDB_DATA rdata = {0};
|
|
int32_t cstatus = 0;
|
|
|
|
data.dptr = (uint8_t*)&db_id;
|
|
data.dsize = sizeof(db_id);
|
|
|
|
ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
|
|
CTDB_CONTROL_GETDBPATH, 0, 0, data,
|
|
mem_ctx, &rdata, &cstatus);
|
|
if ((ret != 0) || cstatus != 0) {
|
|
DEBUG(0, (__location__ " ctdb_control for getdbpath failed: %s\n",
|
|
strerror(ret)));
|
|
return NULL;
|
|
}
|
|
|
|
return (char *)rdata.dptr;
|
|
}
|
|
|
|
/*
|
|
* attach to a ctdb database
|
|
*/
|
|
int ctdbd_db_attach(struct ctdbd_connection *conn,
|
|
const char *name, uint32_t *db_id, int tdb_flags)
|
|
{
|
|
int ret;
|
|
TDB_DATA data;
|
|
int32_t cstatus;
|
|
bool persistent = (tdb_flags & TDB_CLEAR_IF_FIRST) == 0;
|
|
|
|
data = string_term_tdb_data(name);
|
|
|
|
ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
|
|
persistent
|
|
? CTDB_CONTROL_DB_ATTACH_PERSISTENT
|
|
: CTDB_CONTROL_DB_ATTACH,
|
|
tdb_flags, 0, data, NULL, &data, &cstatus);
|
|
if (ret != 0) {
|
|
DEBUG(0, (__location__ " ctdb_control for db_attach "
|
|
"failed: %s\n", strerror(ret)));
|
|
return ret;
|
|
}
|
|
|
|
if (cstatus != 0 || data.dsize != sizeof(uint32_t)) {
|
|
DEBUG(0,(__location__ " ctdb_control for db_attach failed\n"));
|
|
return EIO;
|
|
}
|
|
|
|
*db_id = *(uint32_t *)data.dptr;
|
|
talloc_free(data.dptr);
|
|
|
|
if (!(tdb_flags & TDB_SEQNUM)) {
|
|
return 0;
|
|
}
|
|
|
|
data.dptr = (uint8_t *)db_id;
|
|
data.dsize = sizeof(*db_id);
|
|
|
|
ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
|
|
CTDB_CONTROL_ENABLE_SEQNUM, 0, 0, data,
|
|
NULL, NULL, &cstatus);
|
|
if ((ret != 0) || cstatus != 0) {
|
|
DEBUG(0, (__location__ " ctdb_control for enable seqnum "
|
|
"failed: %s\n", strerror(ret)));
|
|
return (ret == 0) ? EIO : ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* force the migration of a record to this node
|
|
*/
|
|
int ctdbd_migrate(struct ctdbd_connection *conn, uint32_t db_id, TDB_DATA key)
|
|
{
|
|
struct ctdb_req_call req;
|
|
struct ctdb_req_header *hdr;
|
|
struct iovec iov[2];
|
|
ssize_t nwritten;
|
|
int ret;
|
|
|
|
ZERO_STRUCT(req);
|
|
|
|
req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
|
|
req.hdr.ctdb_magic = CTDB_MAGIC;
|
|
req.hdr.ctdb_version = CTDB_PROTOCOL;
|
|
req.hdr.operation = CTDB_REQ_CALL;
|
|
req.hdr.reqid = ctdbd_next_reqid(conn);
|
|
req.flags = CTDB_IMMEDIATE_MIGRATION;
|
|
req.callid = CTDB_NULL_FUNC;
|
|
req.db_id = db_id;
|
|
req.keylen = key.dsize;
|
|
|
|
DEBUG(10, ("ctdbd_migrate: Sending ctdb packet\n"));
|
|
ctdb_packet_dump(&req.hdr);
|
|
|
|
iov[0].iov_base = &req;
|
|
iov[0].iov_len = offsetof(struct ctdb_req_call, data);
|
|
iov[1].iov_base = key.dptr;
|
|
iov[1].iov_len = key.dsize;
|
|
|
|
nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
|
|
if (nwritten == -1) {
|
|
DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
|
|
cluster_fatal("cluster dispatch daemon msg write error\n");
|
|
}
|
|
|
|
ret = ctdb_read_req(conn, req.hdr.reqid, NULL, &hdr);
|
|
if (ret != 0) {
|
|
DEBUG(10, ("ctdb_read_req failed: %s\n", strerror(ret)));
|
|
goto fail;
|
|
}
|
|
|
|
if (hdr->operation != CTDB_REPLY_CALL) {
|
|
DEBUG(0, ("received invalid reply\n"));
|
|
goto fail;
|
|
}
|
|
|
|
fail:
|
|
|
|
TALLOC_FREE(hdr);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Fetch a record and parse it
|
|
*/
|
|
int ctdbd_parse(struct ctdbd_connection *conn, uint32_t db_id,
|
|
TDB_DATA key, bool local_copy,
|
|
void (*parser)(TDB_DATA key, TDB_DATA data,
|
|
void *private_data),
|
|
void *private_data)
|
|
{
|
|
struct ctdb_req_call req;
|
|
struct ctdb_req_header *hdr = NULL;
|
|
struct ctdb_reply_call *reply;
|
|
struct iovec iov[2];
|
|
ssize_t nwritten;
|
|
uint32_t flags;
|
|
int ret;
|
|
|
|
flags = local_copy ? CTDB_WANT_READONLY : 0;
|
|
|
|
ZERO_STRUCT(req);
|
|
|
|
req.hdr.length = offsetof(struct ctdb_req_call, data) + key.dsize;
|
|
req.hdr.ctdb_magic = CTDB_MAGIC;
|
|
req.hdr.ctdb_version = CTDB_PROTOCOL;
|
|
req.hdr.operation = CTDB_REQ_CALL;
|
|
req.hdr.reqid = ctdbd_next_reqid(conn);
|
|
req.flags = flags;
|
|
req.callid = CTDB_FETCH_FUNC;
|
|
req.db_id = db_id;
|
|
req.keylen = key.dsize;
|
|
|
|
iov[0].iov_base = &req;
|
|
iov[0].iov_len = offsetof(struct ctdb_req_call, data);
|
|
iov[1].iov_base = key.dptr;
|
|
iov[1].iov_len = key.dsize;
|
|
|
|
nwritten = write_data_iov(conn->fd, iov, ARRAY_SIZE(iov));
|
|
if (nwritten == -1) {
|
|
DEBUG(3, ("write_data_iov failed: %s\n", strerror(errno)));
|
|
cluster_fatal("cluster dispatch daemon msg write error\n");
|
|
}
|
|
|
|
ret = ctdb_read_req(conn, req.hdr.reqid, NULL, &hdr);
|
|
if (ret != 0) {
|
|
DEBUG(10, ("ctdb_read_req failed: %s\n", strerror(ret)));
|
|
goto fail;
|
|
}
|
|
|
|
if ((hdr == NULL) || (hdr->operation != CTDB_REPLY_CALL)) {
|
|
DEBUG(0, ("received invalid reply\n"));
|
|
ret = EIO;
|
|
goto fail;
|
|
}
|
|
reply = (struct ctdb_reply_call *)hdr;
|
|
|
|
if (reply->datalen == 0) {
|
|
/*
|
|
* Treat an empty record as non-existing
|
|
*/
|
|
ret = ENOENT;
|
|
goto fail;
|
|
}
|
|
|
|
parser(key, make_tdb_data(&reply->data[0], reply->datalen),
|
|
private_data);
|
|
|
|
ret = 0;
|
|
fail:
|
|
TALLOC_FREE(hdr);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
Traverse a ctdb database. This uses a kind-of hackish way to open a second
|
|
connection to ctdbd to avoid the hairy recursive and async problems with
|
|
everything in-line.
|
|
*/
|
|
|
|
int ctdbd_traverse(struct ctdbd_connection *master, uint32_t db_id,
|
|
void (*fn)(TDB_DATA key, TDB_DATA data,
|
|
void *private_data),
|
|
void *private_data)
|
|
{
|
|
struct ctdbd_connection *conn;
|
|
int ret;
|
|
TDB_DATA key, data;
|
|
struct ctdb_traverse_start t;
|
|
int cstatus;
|
|
|
|
become_root();
|
|
ret = ctdbd_init_connection(NULL, master->sockname, master->timeout,
|
|
&conn);
|
|
unbecome_root();
|
|
if (ret != 0) {
|
|
DEBUG(0, ("ctdbd_init_connection failed: %s\n",
|
|
strerror(ret)));
|
|
return ret;
|
|
}
|
|
|
|
t.db_id = db_id;
|
|
t.srvid = conn->rand_srvid;
|
|
t.reqid = ctdbd_next_reqid(conn);
|
|
|
|
data.dptr = (uint8_t *)&t;
|
|
data.dsize = sizeof(t);
|
|
|
|
ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
|
|
CTDB_CONTROL_TRAVERSE_START, conn->rand_srvid,
|
|
0, data, NULL, NULL, &cstatus);
|
|
|
|
if ((ret != 0) || (cstatus != 0)) {
|
|
DEBUG(0,("ctdbd_control failed: %s, %d\n", strerror(ret),
|
|
cstatus));
|
|
|
|
if (ret == 0) {
|
|
/*
|
|
* We need a mapping here
|
|
*/
|
|
ret = EIO;
|
|
}
|
|
TALLOC_FREE(conn);
|
|
return ret;
|
|
}
|
|
|
|
while (True) {
|
|
struct ctdb_req_header *hdr = NULL;
|
|
struct ctdb_req_message *m;
|
|
struct ctdb_rec_data *d;
|
|
|
|
ret = ctdb_read_packet(conn->fd, conn->timeout, conn, &hdr);
|
|
if (ret != 0) {
|
|
DEBUG(0, ("ctdb_read_packet failed: %s\n",
|
|
strerror(ret)));
|
|
cluster_fatal("ctdbd died\n");
|
|
}
|
|
|
|
if (hdr->operation != CTDB_REQ_MESSAGE) {
|
|
DEBUG(0, ("Got operation %u, expected a message\n",
|
|
(unsigned)hdr->operation));
|
|
TALLOC_FREE(conn);
|
|
return EIO;
|
|
}
|
|
|
|
m = (struct ctdb_req_message *)hdr;
|
|
d = (struct ctdb_rec_data *)&m->data[0];
|
|
if (m->datalen < sizeof(uint32_t) || m->datalen != d->length) {
|
|
DEBUG(0, ("Got invalid traverse data of length %d\n",
|
|
(int)m->datalen));
|
|
TALLOC_FREE(conn);
|
|
return EIO;
|
|
}
|
|
|
|
key.dsize = d->keylen;
|
|
key.dptr = &d->data[0];
|
|
data.dsize = d->datalen;
|
|
data.dptr = &d->data[d->keylen];
|
|
|
|
if (key.dsize == 0 && data.dsize == 0) {
|
|
/* end of traverse */
|
|
TALLOC_FREE(conn);
|
|
return 0;
|
|
}
|
|
|
|
if (data.dsize < sizeof(struct ctdb_ltdb_header)) {
|
|
DEBUG(0, ("Got invalid ltdb header length %d\n",
|
|
(int)data.dsize));
|
|
TALLOC_FREE(conn);
|
|
return EIO;
|
|
}
|
|
data.dsize -= sizeof(struct ctdb_ltdb_header);
|
|
data.dptr += sizeof(struct ctdb_ltdb_header);
|
|
|
|
if (fn != NULL) {
|
|
fn(key, data, private_data);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
This is used to canonicalize a ctdb_sock_addr structure.
|
|
*/
|
|
static void smbd_ctdb_canonicalize_ip(const struct sockaddr_storage *in,
|
|
struct sockaddr_storage *out)
|
|
{
|
|
memcpy(out, in, sizeof (*out));
|
|
|
|
#ifdef HAVE_IPV6
|
|
if (in->ss_family == AF_INET6) {
|
|
const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
|
|
const struct sockaddr_in6 *in6 =
|
|
(const struct sockaddr_in6 *)in;
|
|
struct sockaddr_in *out4 = (struct sockaddr_in *)out;
|
|
if (memcmp(&in6->sin6_addr, prefix, 12) == 0) {
|
|
memset(out, 0, sizeof(*out));
|
|
#ifdef HAVE_SOCK_SIN_LEN
|
|
out4->sin_len = sizeof(*out);
|
|
#endif
|
|
out4->sin_family = AF_INET;
|
|
out4->sin_port = in6->sin6_port;
|
|
memcpy(&out4->sin_addr, &in6->sin6_addr.s6_addr[12], 4);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Register us as a server for a particular tcp connection
|
|
*/
|
|
|
|
int ctdbd_register_ips(struct ctdbd_connection *conn,
|
|
const struct sockaddr_storage *_server,
|
|
const struct sockaddr_storage *_client,
|
|
int (*cb)(uint32_t src_vnn, uint32_t dst_vnn,
|
|
uint64_t dst_srvid,
|
|
const uint8_t *msg, size_t msglen,
|
|
void *private_data),
|
|
void *private_data)
|
|
{
|
|
struct ctdb_control_tcp_addr p;
|
|
TDB_DATA data = { .dptr = (uint8_t *)&p, .dsize = sizeof(p) };
|
|
int ret;
|
|
struct sockaddr_storage client;
|
|
struct sockaddr_storage server;
|
|
|
|
/*
|
|
* Only one connection so far
|
|
*/
|
|
|
|
smbd_ctdb_canonicalize_ip(_client, &client);
|
|
smbd_ctdb_canonicalize_ip(_server, &server);
|
|
|
|
switch (client.ss_family) {
|
|
case AF_INET:
|
|
memcpy(&p.dest.ip, &server, sizeof(p.dest.ip));
|
|
memcpy(&p.src.ip, &client, sizeof(p.src.ip));
|
|
break;
|
|
case AF_INET6:
|
|
memcpy(&p.dest.ip6, &server, sizeof(p.dest.ip6));
|
|
memcpy(&p.src.ip6, &client, sizeof(p.src.ip6));
|
|
break;
|
|
default:
|
|
return EIO;
|
|
}
|
|
|
|
/*
|
|
* We want to be told about IP releases
|
|
*/
|
|
|
|
ret = register_with_ctdbd(conn, CTDB_SRVID_RELEASE_IP,
|
|
cb, private_data);
|
|
if (ret != 0) {
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* inform ctdb of our tcp connection, so if IP takeover happens ctdb
|
|
* can send an extra ack to trigger a reset for our client, so it
|
|
* immediately reconnects
|
|
*/
|
|
ret = ctdbd_control(conn, CTDB_CURRENT_NODE,
|
|
CTDB_CONTROL_TCP_CLIENT, 0,
|
|
CTDB_CTRL_FLAG_NOREPLY, data, NULL, NULL,
|
|
NULL);
|
|
if (ret != 0) {
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
call a control on the local node
|
|
*/
|
|
int ctdbd_control_local(struct ctdbd_connection *conn, uint32_t opcode,
|
|
uint64_t srvid, uint32_t flags, TDB_DATA data,
|
|
TALLOC_CTX *mem_ctx, TDB_DATA *outdata,
|
|
int *cstatus)
|
|
{
|
|
return ctdbd_control(conn, CTDB_CURRENT_NODE, opcode, srvid, flags, data,
|
|
mem_ctx, outdata, cstatus);
|
|
}
|
|
|
|
int ctdb_watch_us(struct ctdbd_connection *conn)
|
|
{
|
|
struct ctdb_client_notify_register reg_data;
|
|
size_t struct_len;
|
|
int ret;
|
|
int cstatus;
|
|
|
|
reg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
|
|
reg_data.len = 1;
|
|
reg_data.notify_data[0] = 0;
|
|
|
|
struct_len = offsetof(struct ctdb_client_notify_register,
|
|
notify_data) + reg_data.len;
|
|
|
|
ret = ctdbd_control_local(
|
|
conn, CTDB_CONTROL_REGISTER_NOTIFY, conn->rand_srvid, 0,
|
|
make_tdb_data((uint8_t *)®_data, struct_len),
|
|
NULL, NULL, &cstatus);
|
|
if (ret != 0) {
|
|
DEBUG(1, ("ctdbd_control_local failed: %s\n",
|
|
strerror(ret)));
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ctdb_unwatch(struct ctdbd_connection *conn)
|
|
{
|
|
struct ctdb_client_notify_deregister dereg_data;
|
|
int ret;
|
|
int cstatus;
|
|
|
|
dereg_data.srvid = CTDB_SRVID_SAMBA_NOTIFY;
|
|
|
|
ret = ctdbd_control_local(
|
|
conn, CTDB_CONTROL_DEREGISTER_NOTIFY, conn->rand_srvid, 0,
|
|
make_tdb_data((uint8_t *)&dereg_data, sizeof(dereg_data)),
|
|
NULL, NULL, &cstatus);
|
|
if (ret != 0) {
|
|
DEBUG(1, ("ctdbd_control_local failed: %s\n",
|
|
strerror(ret)));
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ctdbd_probe(const char *sockname, int timeout)
|
|
{
|
|
/*
|
|
* Do a very early check if ctdbd is around to avoid an abort and core
|
|
* later
|
|
*/
|
|
struct ctdbd_connection *conn = NULL;
|
|
int ret;
|
|
|
|
ret = ctdbd_messaging_connection(talloc_tos(), sockname, timeout,
|
|
&conn);
|
|
|
|
/*
|
|
* We only care if we can connect.
|
|
*/
|
|
TALLOC_FREE(conn);
|
|
|
|
return ret;
|
|
}
|