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Checks ulimit open files.

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git-svn-id: file:///svn/unbound/trunk@298 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards
2007-05-09 07:58:57 +00:00
parent db0eccacb4
commit 362a4f2e76
4 changed files with 42 additions and 3 deletions
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daemon/unbound.c
+37
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@@ -45,10 +45,12 @@
#include "daemon/daemon.h"
#include "util/config_file.h"
#include "util/storage/slabhash.h"
#include "services/listen_dnsport.h"
#include "util/data/msgreply.h"
#include <signal.h>
#include <fcntl.h>
#include <pwd.h>
#include <sys/resource.h>
/** print usage. */
static void usage()
@@ -64,6 +66,40 @@ static void usage()
printf("Report bugs to %s\n", PACKAGE_BUGREPORT);
}
/** check file descriptor count */
static void
checkrlimits(struct config_file* cfg)
{
size_t list = ((cfg->do_ip4?1:0) + (cfg->do_ip6?1:0)) *
((cfg->do_udp?1:0) + (cfg->do_tcp?1 + TCP_ACCEPT_COUNT:0));
size_t ifs = (cfg->num_ifs==0?1:cfg->num_ifs);
size_t listen_num = list*ifs;
size_t outnum = cfg->outgoing_num_ports*ifs + cfg->outgoing_num_tcp;
size_t misc = 4; /* logfile, pidfile, stdout... */
size_t perthread = listen_num + outnum + 2/*cmdpipe*/ + 2/*libevent*/
+ misc;
#if !defined(HAVE_PTHREAD) && !defined(HAVE_SOLARIS_THREADS)
size_t numthread = 1; /* it forks */
#else
size_t numthread = cfg->num_threads;
#endif
size_t total = numthread * perthread + misc;
struct rlimit rlim;
if(getrlimit(RLIMIT_NOFILE, &rlim) < 0) {
log_warn("getrlimit: %s", strerror(errno));
return;
}
if((size_t)rlim.rlim_cur < total) {
log_err("Not enough sockets available. Increase "
"ulimit(open files).");
log_err("or decrease number of threads, outgoing num ports, "
"outgoing num tcp or number of interfaces");
log_err("estimate %u fds high mark, %u available",
(unsigned)total, (unsigned)rlim.rlim_cur);
fatal_exit("Not enough file descriptors available");
}
}
/** to changedir, logfile */
static void
apply_dir(struct daemon* daemon, struct config_file* cfg, int cmdline_verbose)
@@ -105,6 +141,7 @@ apply_dir(struct daemon* daemon, struct config_file* cfg, int cmdline_verbose)
fatal_exit("malloc failure updating config settings");
}
}
checkrlimits(cfg);
}
/** Read existing pid from pidfile. */