chiark / gitweb /
random-seed: add little tool for saving/loading random seed on shutdown/boot, but...
[elogind.git] / src / socket.c
index 257a4e959ab60c4fcf612d5c89f882cc7711b5fb..d76a81ff993b8aaeddc22a539c13176d6fac6733 100644 (file)
@@ -30,6 +30,7 @@
 
 #include "unit.h"
 #include "socket.h"
+#include "netinet/tcp.h"
 #include "log.h"
 #include "load-dropin.h"
 #include "load-fragment.h"
@@ -39,6 +40,7 @@
 #include "missing.h"
 #include "special.h"
 #include "bus-errors.h"
+#include "label.h"
 
 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
         [SOCKET_DEAD] = UNIT_INACTIVE,
@@ -115,6 +117,9 @@ static void socket_done(Unit *u) {
 
         s->service = NULL;
 
+        free(s->tcp_congestion);
+        s->tcp_congestion = NULL;
+
         free(s->bind_to_device);
         s->bind_to_device = NULL;
 
@@ -161,6 +166,7 @@ static int socket_instantiate_service(Socket *s) {
         if (r < 0)
                 return r;
 
+        u->meta.no_gc = true;
         s->service = SERVICE(u);
         return 0;
 }
@@ -292,7 +298,7 @@ static int socket_add_default_dependencies(Socket *s) {
                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
                         return r;
 
-        return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
+        return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_SHUTDOWN_TARGET, NULL, true);
 }
 
 static int socket_load(Unit *u) {
@@ -370,14 +376,16 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) {
                 "%sSocketMode: %04o\n"
                 "%sDirectoryMode: %04o\n"
                 "%sKeepAlive: %s\n"
-                "%sFreeBind: %s\n",
+                "%sFreeBind: %s\n"
+                "%sTCPCongestion: %s\n",
                 prefix, socket_state_to_string(s->state),
                 prefix, socket_address_bind_ipv6_only_to_string(s->bind_ipv6_only),
                 prefix, s->backlog,
                 prefix, s->socket_mode,
                 prefix, s->directory_mode,
                 prefix, yes_no(s->keep_alive),
-                prefix, yes_no(s->free_bind));
+                prefix, yes_no(s->free_bind),
+                prefix, s->tcp_congestion);
 
         if (s->control_pid > 0)
                 fprintf(f,
@@ -438,14 +446,14 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) {
                 if (p->type == SOCKET_SOCKET) {
                         const char *t;
                         int r;
-                        char *k;
+                        char *k = NULL;
 
                         if ((r = socket_address_print(&p->address, &k)) < 0)
                                 t = strerror(-r);
                         else
                                 t = k;
 
-                        fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
+                        fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), t);
                         free(k);
                 } else
                         fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
@@ -631,6 +639,10 @@ static void socket_apply_socket_options(Socket *s, int fd) {
                 if (r < 0 && x < 0)
                         log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");
         }
+
+        if (s->tcp_congestion)
+                if (setsockopt(fd, SOL_TCP, TCP_CONGESTION, s->tcp_congestion, strlen(s->tcp_congestion)+1) < 0)
+                        log_warning("TCP_CONGESTION failed: %m");
 }
 
 static void socket_apply_fifo_options(Socket *s, int fd) {
@@ -642,14 +654,15 @@ static void socket_apply_fifo_options(Socket *s, int fd) {
                         log_warning("F_SETPIPE_SZ: %m");
 }
 
+
 static int fifo_address_create(
                 const char *path,
                 mode_t directory_mode,
                 mode_t socket_mode,
-                /* FIXME SELINUX: pass SELinux context object here */
+                const char *label,
                 int *_fd) {
 
-        int fd = -1, r;
+        int fd = -1, r = 0;
         struct stat st;
         mode_t old_mask;
 
@@ -658,8 +671,8 @@ static int fifo_address_create(
 
         mkdir_parents(path, directory_mode);
 
-        /* FIXME SELINUX: The mkfifo here should be done with
-         * the right SELinux context set */
+        if ((r = label_fifofile_set(label, path)) < 0)
+                goto fail;
 
         /* Enforce the right access mode for the fifo */
         old_mask = umask(~ socket_mode);
@@ -680,13 +693,15 @@ static int fifo_address_create(
                 goto fail;
         }
 
+        label_file_clear();
+
         if (fstat(fd, &st) < 0) {
                 r = -errno;
                 goto fail;
         }
 
         if (!S_ISFIFO(st.st_mode) ||
-            st.st_mode != (socket_mode & ~old_mask) ||
+            (st.st_mode & 0777) != (socket_mode & ~old_mask) ||
             st.st_uid != getuid() ||
             st.st_gid != getgid()) {
 
@@ -698,6 +713,8 @@ static int fifo_address_create(
         return 0;
 
 fail:
+        label_file_clear();
+
         if (fd >= 0)
                 close_nointr_nofail(fd);
 
@@ -707,24 +724,15 @@ fail:
 static int socket_open_fds(Socket *s) {
         SocketPort *p;
         int r;
+        char *label = NULL;
 
         assert(s);
 
-        /* FIXME SELINUX: Somewhere here we must set the the SELinux
-           context for the created sockets and FIFOs. To figure out
-           the executable name for this, use
-           socket_instantiate_service() and then access the executable
-           path name via
-           s->service->exec_command[SERVICE_EXEC_START]->path. Example:
-
         if ((r = socket_instantiate_service(s)) < 0)
                 return r;
 
-        log_debug("Socket unit %s will spawn service unit %s with executable path %s.",
-                  s->meta.id,
-                  s->service->meta.id,
-                  s->service->exec_command[SERVICE_EXEC_START]->path);
-        */
+        if ((r = label_get_socket_label_from_exe(s->service->exec_command[SERVICE_EXEC_START]->path, &label)) < 0)
+                return r;
 
         LIST_FOREACH(port, p, s->ports) {
 
@@ -741,7 +749,7 @@ static int socket_open_fds(Socket *s) {
                                              s->free_bind,
                                              s->directory_mode,
                                              s->socket_mode,
-                                             /* FIXME SELINUX: Pass the SELinux context object here */
+                                             label,
                                              &p->fd)) < 0)
                                 goto rollback;
 
@@ -753,7 +761,7 @@ static int socket_open_fds(Socket *s) {
                                              p->path,
                                              s->directory_mode,
                                              s->socket_mode,
-                                             /* FIXME SELINUX: Pass the SELinux context object here */
+                                             label,
                                              &p->fd)) < 0)
                                 goto rollback;
 
@@ -763,10 +771,12 @@ static int socket_open_fds(Socket *s) {
                         assert_not_reached("Unknown port type");
         }
 
+        label_free(label);
         return 0;
 
 rollback:
         socket_close_fds(s);
+        label_free(label);
         return r;
 }
 
@@ -1194,6 +1204,8 @@ static void socket_enter_running(Socket *s, int cfd) {
                 s->service = NULL;
                 s->n_accepted ++;
 
+                service->meta.no_gc = false;
+
                 unit_choose_id(UNIT(service), name);
                 free(name);
 
@@ -1363,7 +1375,6 @@ static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
 
 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
         Socket *s = SOCKET(u);
-        int r;
 
         assert(u);
         assert(key);
@@ -1388,14 +1399,14 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value,
         } else if (streq(key, "n-accepted")) {
                 unsigned k;
 
-                if ((r = safe_atou(value, &k)) < 0)
+                if (safe_atou(value, &k) < 0)
                         log_debug("Failed to parse n-accepted value %s", value);
                 else
                         s->n_accepted += k;
         } else if (streq(key, "control-pid")) {
                 pid_t pid;
 
-                if ((r = parse_pid(value, &pid)) < 0)
+                if (parse_pid(value, &pid) < 0)
                         log_debug("Failed to parse control-pid value %s", value);
                 else
                         s->control_pid = pid;
@@ -1535,7 +1546,8 @@ static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
                         success = true;
         }
 
-        log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
+        log_full(success ? LOG_DEBUG : LOG_NOTICE,
+                 "%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
         s->failure = s->failure || !success;
 
         if (s->control_command && s->control_command->command_next && success) {
@@ -1653,7 +1665,7 @@ int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
                 if (p->fd >= 0)
                         rn_fds++;
 
-        if (!(rfds = new(int, rn_fds)) < 0)
+        if (!(rfds = new(int, rn_fds)))
                 return -ENOMEM;
 
         k = 0;
@@ -1697,6 +1709,17 @@ void socket_connection_unref(Socket *s) {
         log_debug("%s: One connection closed, %u left.", s->meta.id, s->n_connections);
 }
 
+static void socket_reset_maintenance(Unit *u) {
+        Socket *s = SOCKET(u);
+
+        assert(s);
+
+        if (s->state == SOCKET_MAINTENANCE)
+                socket_set_state(s, SOCKET_DEAD);
+
+        s->failure = false;
+}
+
 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
         [SOCKET_DEAD] = "dead",
         [SOCKET_START_PRE] = "start-pre",
@@ -1749,5 +1772,7 @@ const UnitVTable socket_vtable = {
         .sigchld_event = socket_sigchld_event,
         .timer_event = socket_timer_event,
 
+        .reset_maintenance = socket_reset_maintenance,
+
         .bus_message_handler = bus_socket_message_handler
 };