swap: don't try to shutdown swaps on shutdown in a container

[elogind.git] / src / core / swap.c

diff --git a/src/core/swap.c b/src/core/swap.c
index aeb8bdab36ef4723ec5cdc9a7da82b9c4644e873..8ba60559c698455fb48e5ce510c24549c4849b6b 100644 (file)
--- a/src/core/swap.c
+++ b/src/core/swap.c
@@ -39,6 +39,7 @@
 #include "exit-status.h"
 #include "def.h"
 #include "path-util.h"
+#include "virt.h"
 
 static const UnitActiveState state_translation_table[_SWAP_STATE_MAX] = {
         [SWAP_DEAD] = UNIT_INACTIVE,
@@ -86,6 +87,7 @@ static void swap_init(Unit *u) {
         exec_context_init(&s->exec_context);
         s->exec_context.std_output = u->manager->default_std_output;
         s->exec_context.std_error = u->manager->default_std_error;
+        kill_context_init(&s->kill_context);
 
         s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1;
 
@@ -172,7 +174,8 @@ static int swap_add_target_links(Swap *s) {
         if (!s->from_fragment)
                 return 0;
 
-        if ((r = manager_load_unit(UNIT(s)->manager, SPECIAL_SWAP_TARGET, NULL, NULL, &tu)) < 0)
+        r = manager_load_unit(UNIT(s)->manager, SPECIAL_SWAP_TARGET, NULL, NULL, &tu);
+        if (r < 0)
                 return r;
 
         return unit_add_dependency(UNIT(s), UNIT_BEFORE, tu, true);
@@ -210,6 +213,9 @@ static int swap_add_default_dependencies(Swap *s) {
         if (UNIT(s)->manager->running_as != MANAGER_SYSTEM)
                 return 0;
 
+        if (detect_container(NULL) > 0)
+                return 0;
+
         r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
         if (r < 0)
                 return r;
@@ -235,7 +241,7 @@ static int swap_verify(Swap *s) {
                 return -EINVAL;
         }
 
-        if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
+        if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
                 return -EINVAL;
         }
@@ -294,6 +300,10 @@ static int swap_load(Unit *u) {
                 if (UNIT(s)->default_dependencies)
                         if ((r = swap_add_default_dependencies(s)) < 0)
                                 return r;
+
+                r = unit_exec_context_defaults(u, &s->exec_context);
+                if (r < 0)
+                        return r;
         }
 
         return swap_verify(s);
@@ -565,6 +575,7 @@ static void swap_dump(Unit *u, FILE *f, const char *prefix) {
                         prefix, (unsigned long) s->control_pid);
 
         exec_context_dump(&s->exec_context, f, prefix);
+        kill_context_dump(&s->kill_context, f, prefix);
 }
 
 static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) {
@@ -637,9 +648,9 @@ static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) {
         if (f != SWAP_SUCCESS)
                 s->result = f;
 
-        if (s->exec_context.kill_mode != KILL_NONE) {
+        if (s->kill_context.kill_mode != KILL_NONE) {
                 int sig = (state == SWAP_ACTIVATING_SIGTERM ||
-                           state == SWAP_DEACTIVATING_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
+                           state == SWAP_DEACTIVATING_SIGTERM) ? s->kill_context.kill_signal : SIGKILL;
 
                 if (s->control_pid > 0) {
                         if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
@@ -649,7 +660,7 @@ static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) {
                                 wait_for_exit = true;
                 }
 
-                if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
+                if (s->kill_context.kill_mode == KILL_CONTROL_GROUP) {
 
                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
                                 r = -ENOMEM;
@@ -791,6 +802,9 @@ static int swap_start(Unit *u) {
 
         assert(s->state == SWAP_DEAD || s->state == SWAP_FAILED);
 
+        if (detect_container(NULL) > 0)
+                return -EPERM;
+
         s->result = SWAP_SUCCESS;
         swap_enter_activating(s);
         return 0;
@@ -811,6 +825,9 @@ static int swap_stop(Unit *u) {
         assert(s->state == SWAP_ACTIVATING ||
                s->state == SWAP_ACTIVE);
 
+        if (detect_container(NULL) > 0)
+                return -EPERM;
+
         swap_enter_deactivating(s);
         return 0;
 }
@@ -911,7 +928,7 @@ static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) {
 
         s->control_pid = 0;
 
-        if (is_clean_exit(code, status))
+        if (is_clean_exit(code, status, NULL))
                 f = SWAP_SUCCESS;
         else if (code == CLD_EXITED)
                 f = SWAP_FAILURE_EXIT_CODE;
@@ -989,7 +1006,7 @@ static void swap_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
                 break;
 
         case SWAP_ACTIVATING_SIGTERM:
-                if (s->exec_context.send_sigkill) {
+                if (s->kill_context.send_sigkill) {
                         log_warning("%s activation timed out. Killing.", u->id);
                         swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT);
                 } else {
@@ -999,7 +1016,7 @@ static void swap_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
                 break;
 
         case SWAP_DEACTIVATING_SIGTERM:
-                if (s->exec_context.send_sigkill) {
+                if (s->kill_context.send_sigkill) {
                         log_warning("%s deactivation timed out. Killing.", u->id);
                         swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT);
                 } else {
@@ -1254,7 +1271,7 @@ static void swap_reset_failed(Unit *u) {
         s->result = SWAP_SUCCESS;
 }
 
-static int swap_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
+static int swap_kill(Unit *u, KillWho who, int signo, DBusError *error) {
         Swap *s = SWAP(u);
         int r = 0;
         Set *pid_set = NULL;
@@ -1276,23 +1293,25 @@ static int swap_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *
                         if (kill(s->control_pid, signo) < 0)
                                 r = -errno;
 
-        if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
+        if (who == KILL_ALL) {
                 int q;
 
-                if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
+                pid_set = set_new(trivial_hash_func, trivial_compare_func);
+                if (!pid_set)
                         return -ENOMEM;
 
                 /* Exclude the control pid from being killed via the cgroup */
-                if (s->control_pid > 0)
-                        if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
+                if (s->control_pid > 0) {
+                        q = set_put(pid_set, LONG_TO_PTR(s->control_pid));
+                        if (q < 0) {
                                 r = q;
                                 goto finish;
                         }
+                }
 
                 q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, false, pid_set, NULL);
-                if (q < 0)
-                        if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
-                                r = q;
+                if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT)
+                        r = q;
         }
 
 finish: