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5190932507
eventscript.c uses this now, but our next patch makes others use it. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (This used to be ctdb commit a305cb7743c24386e464f6b2efab7e2108bb1e7e)
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/*
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ctdb banning code
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Copyright (C) Ronnie Sahlberg 2009
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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 "lib/events/events.h"
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#include "lib/tdb/include/tdb.h"
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#include "system/time.h"
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#include "system/network.h"
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#include "system/filesys.h"
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#include "system/wait.h"
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#include "../include/ctdb.h"
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#include "../include/ctdb_private.h"
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static void
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ctdb_ban_node_event(struct event_context *ev, struct timed_event *te,
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struct timeval t, void *private_data)
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{
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struct ctdb_context *ctdb = talloc_get_type(private_data, struct ctdb_context);
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DEBUG(DEBUG_ERR,("Banning timedout\n"));
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ctdb->nodes[ctdb->pnn]->flags &= ~NODE_FLAGS_BANNED;
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if (ctdb->banning_ctx != NULL) {
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talloc_free(ctdb->banning_ctx);
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ctdb->banning_ctx = NULL;
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}
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}
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int32_t ctdb_control_set_ban_state(struct ctdb_context *ctdb, TDB_DATA indata)
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{
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struct ctdb_ban_time *bantime = (struct ctdb_ban_time *)indata.dptr;
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DEBUG(DEBUG_INFO,("SET BAN STATE\n"));
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if (bantime->pnn != ctdb->pnn) {
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if (bantime->pnn < 0 || bantime->pnn >= ctdb->num_nodes) {
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DEBUG(DEBUG_ERR,(__location__ " ERROR: Invalid ban request. PNN:%d is invalid. Max nodes %d\n", bantime->pnn, ctdb->num_nodes));
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return -1;
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}
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if (bantime->time == 0) {
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DEBUG(DEBUG_INFO,("unbanning node %d\n", bantime->pnn));
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ctdb->nodes[bantime->pnn]->flags &= ~NODE_FLAGS_BANNED;
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} else {
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DEBUG(DEBUG_INFO,("banning node %d\n", bantime->pnn));
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if (ctdb->tunable.enable_bans == 0) {
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DEBUG(DEBUG_INFO,("Bans are disabled - ignoring ban of node %u\n", bantime->pnn));
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return 0;
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}
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ctdb->nodes[bantime->pnn]->flags |= NODE_FLAGS_BANNED;
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}
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return 0;
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}
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if (ctdb->banning_ctx != NULL) {
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talloc_free(ctdb->banning_ctx);
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ctdb->banning_ctx = NULL;
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}
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if (bantime->time == 0) {
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DEBUG(DEBUG_ERR,("Unbanning this node\n"));
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ctdb->nodes[bantime->pnn]->flags &= ~NODE_FLAGS_BANNED;
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return 0;
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}
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if (ctdb->tunable.enable_bans == 0) {
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DEBUG(DEBUG_ERR,("Bans are disabled - ignoring ban of node %u\n", bantime->pnn));
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return 0;
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}
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ctdb->banning_ctx = talloc(ctdb, struct ctdb_ban_time);
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if (ctdb->banning_ctx == NULL) {
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DEBUG(DEBUG_CRIT,(__location__ " ERROR Failed to allocate new banning state\n"));
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return -1;
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}
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*((struct ctdb_ban_time *)(ctdb->banning_ctx)) = *bantime;
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DEBUG(DEBUG_ERR,("Banning this node for %d seconds\n", bantime->time));
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ctdb->nodes[bantime->pnn]->flags |= NODE_FLAGS_BANNED;
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event_add_timed(ctdb->ev, ctdb->banning_ctx, timeval_current_ofs(bantime->time,0), ctdb_ban_node_event, ctdb);
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return 0;
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}
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int32_t ctdb_control_get_ban_state(struct ctdb_context *ctdb, TDB_DATA *outdata)
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{
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struct ctdb_ban_time *bantime;
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bantime = talloc(outdata, struct ctdb_ban_time);
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CTDB_NO_MEMORY(ctdb, bantime);
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if (ctdb->banning_ctx != NULL) {
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*bantime = *(struct ctdb_ban_time *)(ctdb->banning_ctx);
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} else {
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bantime->pnn = ctdb->pnn;
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bantime->time = 0;
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}
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outdata->dptr = (uint8_t *)bantime;
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outdata->dsize = sizeof(struct ctdb_ban_time);
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return 0;
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}
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/* Routine to ban ourselves for a while when trouble strikes. */
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void ctdb_ban_self(struct ctdb_context *ctdb)
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{
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TDB_DATA data;
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struct ctdb_ban_time bantime;
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bantime.pnn = ctdb->pnn;
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bantime.time = ctdb->tunable.recovery_ban_period;
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data.dsize = sizeof(bantime);
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data.dptr = (uint8_t *)&bantime;
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ctdb_control_set_ban_state(ctdb, data);
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}
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