mirror of
https://github.com/samba-team/samba.git
synced 2024-12-23 17:34:34 +03:00
9cde594006
not __sched_priority (This used to be ctdb commit c08c5a36b3f1dd2cb72278058cb5664816e1d339)
264 lines
5.4 KiB
C
264 lines
5.4 KiB
C
/*
|
|
ctdb utility code
|
|
|
|
Copyright (C) Andrew Tridgell 2006
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
#include "lib/events/events.h"
|
|
#include "lib/tdb/include/tdb.h"
|
|
#include "system/network.h"
|
|
#include "system/filesys.h"
|
|
#include "../include/ctdb_private.h"
|
|
|
|
int LogLevel;
|
|
|
|
/*
|
|
return error string for last error
|
|
*/
|
|
const char *ctdb_errstr(struct ctdb_context *ctdb)
|
|
{
|
|
return ctdb->err_msg;
|
|
}
|
|
|
|
|
|
/*
|
|
remember an error message
|
|
*/
|
|
void ctdb_set_error(struct ctdb_context *ctdb, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
talloc_free(ctdb->err_msg);
|
|
va_start(ap, fmt);
|
|
ctdb->err_msg = talloc_vasprintf(ctdb, fmt, ap);
|
|
DEBUG(0,("ctdb error: %s\n", ctdb->err_msg));
|
|
va_end(ap);
|
|
}
|
|
|
|
/*
|
|
a fatal internal error occurred - no hope for recovery
|
|
*/
|
|
void ctdb_fatal(struct ctdb_context *ctdb, const char *msg)
|
|
{
|
|
DEBUG(0,("ctdb fatal error: %s\n", msg));
|
|
abort();
|
|
}
|
|
|
|
/*
|
|
parse a IP:port pair
|
|
*/
|
|
int ctdb_parse_address(struct ctdb_context *ctdb,
|
|
TALLOC_CTX *mem_ctx, const char *str,
|
|
struct ctdb_address *address)
|
|
{
|
|
struct servent *se;
|
|
|
|
setservent(0);
|
|
se = getservbyname("ctdb", "tcp");
|
|
endservent();
|
|
|
|
address->address = talloc_strdup(mem_ctx, str);
|
|
if (se == NULL) {
|
|
address->port = CTDB_PORT;
|
|
} else {
|
|
address->port = ntohs(se->s_port);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
check if two addresses are the same
|
|
*/
|
|
bool ctdb_same_address(struct ctdb_address *a1, struct ctdb_address *a2)
|
|
{
|
|
return strcmp(a1->address, a2->address) == 0 && a1->port == a2->port;
|
|
}
|
|
|
|
|
|
/*
|
|
hash function for mapping data to a VNN - taken from tdb
|
|
*/
|
|
uint32_t ctdb_hash(const TDB_DATA *key)
|
|
{
|
|
uint32_t value; /* Used to compute the hash value. */
|
|
uint32_t i; /* Used to cycle through random values. */
|
|
|
|
/* Set the initial value from the key size. */
|
|
for (value = 0x238F13AF * key->dsize, i=0; i < key->dsize; i++)
|
|
value = (value + (key->dptr[i] << (i*5 % 24)));
|
|
|
|
return (1103515243 * value + 12345);
|
|
}
|
|
|
|
/*
|
|
a type checking varient of idr_find
|
|
*/
|
|
static void *_idr_find_type(struct idr_context *idp, int id, const char *type, const char *location)
|
|
{
|
|
void *p = idr_find(idp, id);
|
|
if (p && talloc_check_name(p, type) == NULL) {
|
|
DEBUG(0,("%s idr_find_type expected type %s but got %s\n",
|
|
location, type, talloc_get_name(p)));
|
|
return NULL;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
|
|
/*
|
|
update a max latency number
|
|
*/
|
|
void ctdb_latency(double *latency, struct timeval t)
|
|
{
|
|
double l = timeval_elapsed(&t);
|
|
if (l > *latency) {
|
|
*latency = l;
|
|
}
|
|
}
|
|
|
|
uint32_t ctdb_reqid_new(struct ctdb_context *ctdb, void *state)
|
|
{
|
|
uint32_t id;
|
|
|
|
id = ctdb->idr_cnt++ & 0xFFFF;
|
|
id |= (idr_get_new(ctdb->idr, state, 0xFFFF)<<16);
|
|
return id;
|
|
}
|
|
|
|
void *_ctdb_reqid_find(struct ctdb_context *ctdb, uint32_t reqid, const char *type, const char *location)
|
|
{
|
|
void *p;
|
|
|
|
p = _idr_find_type(ctdb->idr, (reqid>>16)&0xFFFF, type, location);
|
|
if (p == NULL) {
|
|
DEBUG(0, ("Could not find idr:%u\n",reqid));
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
|
|
void ctdb_reqid_remove(struct ctdb_context *ctdb, uint32_t reqid)
|
|
{
|
|
int ret;
|
|
|
|
ret = idr_remove(ctdb->idr, (reqid>>16)&0xFFFF);
|
|
if (ret != 0) {
|
|
DEBUG(0, ("Removing idr that does not exist\n"));
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
form a ctdb_rec_data record from a key/data pair
|
|
*/
|
|
struct ctdb_rec_data *ctdb_marshall_record(TALLOC_CTX *mem_ctx, uint32_t reqid, TDB_DATA key, TDB_DATA data)
|
|
{
|
|
size_t length;
|
|
struct ctdb_rec_data *d;
|
|
|
|
length = offsetof(struct ctdb_rec_data, data) + key.dsize + data.dsize;
|
|
d = (struct ctdb_rec_data *)talloc_size(mem_ctx, length);
|
|
if (d == NULL) {
|
|
return NULL;
|
|
}
|
|
d->length = length;
|
|
d->reqid = reqid;
|
|
d->keylen = key.dsize;
|
|
d->datalen = data.dsize;
|
|
memcpy(&d->data[0], key.dptr, key.dsize);
|
|
memcpy(&d->data[key.dsize], data.dptr, data.dsize);
|
|
return d;
|
|
}
|
|
|
|
#if HAVE_SCHED_H
|
|
#include <sched.h>
|
|
#endif
|
|
|
|
/*
|
|
if possible, make this task real time
|
|
*/
|
|
void ctdb_set_realtime(bool enable)
|
|
{
|
|
#if HAVE_SCHED_SETSCHEDULER
|
|
struct sched_param p;
|
|
p.sched_priority = 1;
|
|
|
|
if (enable) {
|
|
if (sched_setscheduler(getpid(), SCHED_FIFO, &p) == -1) {
|
|
DEBUG(0,("Unable to set scheduler to SCHED_FIFO (%s)\n", strerror(errno)));
|
|
} else {
|
|
DEBUG(0,("Set scheduler to SCHED_FIFO\n"));
|
|
}
|
|
} else {
|
|
sched_setscheduler(getpid(), SCHED_OTHER, &p);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void set_nonblocking(int fd)
|
|
{
|
|
unsigned v;
|
|
v = fcntl(fd, F_GETFL, 0);
|
|
fcntl(fd, F_SETFL, v | O_NONBLOCK);
|
|
}
|
|
|
|
void set_close_on_exec(int fd)
|
|
{
|
|
unsigned v;
|
|
v = fcntl(fd, F_GETFD, 0);
|
|
fcntl(fd, F_SETFD, v | FD_CLOEXEC);
|
|
}
|
|
|
|
|
|
/*
|
|
parse a ip:port pair
|
|
*/
|
|
bool parse_ip_port(const char *s, struct sockaddr_in *ip)
|
|
{
|
|
const char *p;
|
|
char *endp = NULL;
|
|
unsigned port;
|
|
char buf[16];
|
|
|
|
ip->sin_family = AF_INET;
|
|
|
|
p = strchr(s, ':');
|
|
if (p == NULL) {
|
|
return false;
|
|
}
|
|
|
|
if (p - s > 15) {
|
|
return false;
|
|
}
|
|
|
|
port = strtoul(p+1, &endp, 10);
|
|
if (endp == NULL || *endp != 0) {
|
|
/* trailing garbage */
|
|
return false;
|
|
}
|
|
ip->sin_port = htons(port);
|
|
|
|
strlcpy(buf, s, 1+p-s);
|
|
|
|
if (inet_aton(buf, &ip->sin_addr) == 0) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|