Merge pull request #1754 from martinpitt/master

[thirdparty/systemd.git] / src / core / main.c

diff --git a/src/core/main.c b/src/core/main.c
index 2454c8b962109e3027cda234d6bebe2c82439e0d..578de17fec370b2d31b57384bda0594242c20930 100644 (file)
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -40,20 +40,23 @@
 #include "sd-daemon.h"
 #include "sd-bus.h"
 
+#include "alloc-util.h"
 #include "architecture.h"
 #include "build.h"
 #include "bus-error.h"
 #include "bus-util.h"
-#include "capability.h"
+#include "capability-util.h"
 #include "clock-util.h"
 #include "conf-parser.h"
 #include "cpu-set-util.h"
 #include "dbus-manager.h"
 #include "def.h"
 #include "env-util.h"
+#include "fd-util.h"
 #include "fdset.h"
 #include "fileio.h"
 #include "formats-util.h"
+#include "fs-util.h"
 #include "hostname-setup.h"
 #include "ima-setup.h"
 #include "killall.h"
@@ -66,15 +69,21 @@
 #include "missing.h"
 #include "mount-setup.h"
 #include "pager.h"
+#include "parse-util.h"
+#include "proc-cmdline.h"
 #include "process-util.h"
+#include "rlimit-util.h"
 #include "selinux-setup.h"
 #include "selinux-util.h"
 #include "signal-util.h"
 #include "smack-setup.h"
 #include "special.h"
+#include "stat-util.h"
+#include "stdio-util.h"
 #include "strv.h"
 #include "switch-root.h"
 #include "terminal-util.h"
+#include "user-util.h"
 #include "virt.h"
 #include "watchdog.h"
 
@@ -599,7 +608,7 @@ static int config_parse_join_controllers(const char *unit,
                         for (a = arg_join_controllers; *a; a++) {
 
                                 if (strv_overlap(*a, l)) {
-                                        if (strv_extend_strv(&l, *a) < 0) {
+                                        if (strv_extend_strv(&l, *a, false) < 0) {
                                                 strv_free(l);
                                                 strv_free_free(t);
                                                 return log_oom();
@@ -1104,33 +1113,6 @@ static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
         return 0;
 }
 
-static void test_mtab(void) {
-
-        static const char ok[] =
-                "/proc/self/mounts\0"
-                "/proc/mounts\0"
-                "../proc/self/mounts\0"
-                "../proc/mounts\0";
-
-        _cleanup_free_ char *p = NULL;
-        int r;
-
-        /* Check that /etc/mtab is a symlink to the right place or
-         * non-existing. But certainly not a file, or a symlink to
-         * some weird place... */
-
-        r = readlink_malloc("/etc/mtab", &p);
-        if (r == -ENOENT)
-                return;
-        if (r >= 0 && nulstr_contains(ok, p))
-                return;
-
-        log_error("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
-                  "This is not supported anymore. "
-                  "Please replace /etc/mtab with a symlink to /proc/self/mounts.");
-        freeze_or_reboot();
-}
-
 static void test_usr(void) {
 
         /* Check that /usr is not a separate fs */
@@ -1233,12 +1215,50 @@ static int status_welcome(void) {
 
 static int write_container_id(void) {
         const char *c;
+        int r;
 
         c = getenv("container");
         if (isempty(c))
                 return 0;
 
-        return write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE);
+        r = write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE);
+        if (r < 0)
+                return log_warning_errno(r, "Failed to write /run/systed/container, ignoring: %m");
+
+        return 1;
+}
+
+static int bump_unix_max_dgram_qlen(void) {
+        _cleanup_free_ char *qlen = NULL;
+        unsigned long v;
+        int r;
+
+        /* Let's bump the net.unix.max_dgram_qlen sysctl. The kernel
+         * default of 16 is simply too low. We set the value really
+         * really early during boot, so that it is actually applied to
+         * all our sockets, including the $NOTIFY_SOCKET one. */
+
+        r = read_one_line_file("/proc/sys/net/unix/max_dgram_qlen", &qlen);
+        if (r < 0)
+                return log_warning_errno(r, "Failed to read AF_UNIX datagram queue length, ignoring: %m");
+
+        r = safe_atolu(qlen, &v);
+        if (r < 0)
+                return log_warning_errno(r, "Failed to parse AF_UNIX datagram queue length, ignoring: %m");
+
+        if (v >= DEFAULT_UNIX_MAX_DGRAM_QLEN)
+                return 0;
+
+        qlen = mfree(qlen);
+        if (asprintf(&qlen, "%lu\n", DEFAULT_UNIX_MAX_DGRAM_QLEN) < 0)
+                return log_oom();
+
+        r = write_string_file("/proc/sys/net/unix/max_dgram_qlen", qlen, 0);
+        if (r < 0)
+                return log_full_errno(IN_SET(r, -EROFS, -EPERM, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
+                                      "Failed to bump AF_UNIX datagram queue length, ignoring: %m");
+
+        return 1;
 }
 
 int main(int argc, char *argv[]) {
@@ -1604,8 +1624,8 @@ int main(int argc, char *argv[]) {
                 hostname_setup();
                 machine_id_setup(NULL);
                 loopback_setup();
+                bump_unix_max_dgram_qlen();
 
-                test_mtab();
                 test_usr();
         }