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Check somaxconn system settings on macOS, FreeBSD and OpenBSD. (#9972)

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Co-authored-by: Yossi Gottlieb <yossigo@gmail.com>
This commit is contained in:
David CARLIER 2021-12-28 07:20:10 +00:00 committed by GitHub
parent af0b50f83a
commit 2c5573e894
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 37 additions and 1 deletions
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7
src/config.h
View File

@ -63,6 +63,13 @@
#define HAVE_TASKINFO 1
#endif
/* Test for somaxconn check */
#if defined(__APPLE__) || defined(__FreeBSD__)
#define HAVE_SYSCTL_KIPC_SOMAXCONN 1
#elif defined(__OpenBSD__)
#define HAVE_SYSCTL_KERN_SOMAXCONN 1
#endif
/* Test for backtrace() */
#if defined(__APPLE__) || (defined(__linux__) && defined(__GLIBC__)) || \
defined(__FreeBSD__) || ((defined(__OpenBSD__) || defined(__NetBSD__)) && defined(USE_BACKTRACE))\

31
src/server.c
View File

@ -64,6 +64,10 @@
#include <sys/mman.h>
#endif
#if defined(HAVE_SYSCTL_KIPC_SOMAXCONN) || defined(HAVE_SYSCTL_KERN_SOMAXCONN)
#include <sys/sysctl.h>
#endif
/* Our shared "common" objects */
struct sharedObjectsStruct shared;
@ -2028,7 +2032,7 @@ void adjustOpenFilesLimit(void) {
/* Check that server.tcp_backlog can be actually enforced in Linux according
* to the value of /proc/sys/net/core/somaxconn, or warn about it. */
void checkTcpBacklogSettings(void) {
#ifdef HAVE_PROC_SOMAXCONN
#if defined(HAVE_PROC_SOMAXCONN)
FILE *fp = fopen("/proc/sys/net/core/somaxconn","r");
char buf[1024];
if (!fp) return;
@ -2039,6 +2043,31 @@ void checkTcpBacklogSettings(void) {
}
}
fclose(fp);
#elif defined(HAVE_SYSCTL_KIPC_SOMAXCONN)
int somaxconn, mib[3];
size_t len = sizeof(int);
mib[0] = CTL_KERN;
mib[1] = KERN_IPC;
mib[2] = KIPC_SOMAXCONN;
if (sysctl(mib, 3, &somaxconn, &len, NULL, 0) == 0) {
if (somaxconn > 0 && somaxconn < server.tcp_backlog) {
serverLog(LL_WARNING,"WARNING: The TCP backlog setting of %d cannot be enforced because kern.ipc.somaxconn is set to the lower value of %d.", server.tcp_backlog, somaxconn);
}
}
#elif defined(HAVE_SYSCTL_KERN_SOMAXCONN)
int somaxconn, mib[2];
size_t len = sizeof(int);
mib[0] = CTL_KERN;
mib[1] = KERN_SOMAXCONN;
if (sysctl(mib, 2, &somaxconn, &len, NULL, 0) == 0) {
if (somaxconn > 0 && somaxconn < server.tcp_backlog) {
serverLog(LL_WARNING,"WARNING: The TCP backlog setting of %d cannot be enforced because kern.somaxconn is set to the lower value of %d.", server.tcp_backlog, somaxconn);
}
}
#endif
}