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-rw-r--r--src/core/swap.c159
1 files changed, 95 insertions, 64 deletions
diff --git a/src/core/swap.c b/src/core/swap.c
index 76ab962a17..206bd939ca 100644
--- a/src/core/swap.c
+++ b/src/core/swap.c
@@ -150,7 +150,8 @@ int swap_add_one_mount_link(Swap *s, Mount *m) {
if (!path_startswith(s->what, m->where))
return 0;
- if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
+ r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
+ if (r < 0)
return r;
return 0;
@@ -224,12 +225,12 @@ static int swap_verify(Swap *s) {
b = unit_has_name(UNIT(s), e);
if (!b) {
- log_error("%s: Value of \"What\" and unit name do not match, not loading.\n", UNIT(s)->id);
+ log_error("%s: Value of \"What\" and unit name do not match, not loading.", UNIT(s)->id);
return -EINVAL;
}
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);
+ log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing to load.", UNIT(s)->id);
return -EINVAL;
}
@@ -244,11 +245,13 @@ static int swap_load(Unit *u) {
assert(u->load_state == UNIT_STUB);
/* Load a .swap file */
- if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
+ r = unit_load_fragment_and_dropin_optional(u);
+ if (r < 0)
return r;
if (u->load_state == UNIT_LOADED) {
- if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
+ r = unit_add_exec_dependencies(u, &s->exec_context);
+ if (r < 0)
return r;
if (UNIT(s)->fragment_path)
@@ -272,18 +275,23 @@ static int swap_load(Unit *u) {
if ((r = unit_set_description(u, s->what)) < 0)
return r;
- if ((r = swap_add_device_links(s)) < 0)
+ r = swap_add_device_links(s);
+ if (r < 0)
return r;
- if ((r = swap_add_mount_links(s)) < 0)
+ r = swap_add_mount_links(s);
+ if (r < 0)
return r;
- if ((r = unit_add_default_cgroups(u)) < 0)
+ r = unit_add_default_cgroups(u);
+ if (r < 0)
return r;
- if (UNIT(s)->default_dependencies)
- if ((r = swap_add_default_dependencies(s)) < 0)
+ if (UNIT(s)->default_dependencies) {
+ r = swap_add_default_dependencies(s);
+ if (r < 0)
return r;
+ }
r = unit_exec_context_defaults(u, &s->exec_context);
if (r < 0)
@@ -338,7 +346,7 @@ static int swap_add_one(
SWAP(u)->what = strdup(what);
if (!SWAP(u)->what) {
- r = -ENOMEM;
+ r = log_oom();
goto fail;
}
@@ -349,16 +357,19 @@ static int swap_add_one(
p = &SWAP(u)->parameters_proc_swaps;
if (!p->what) {
- if (!(wp = strdup(what_proc_swaps))) {
- r = -ENOMEM;
+ wp = strdup(what_proc_swaps);
+ if (!wp) {
+ r = log_oom();
goto fail;
}
- if (!m->swaps_by_proc_swaps)
- if (!(m->swaps_by_proc_swaps = hashmap_new(string_hash_func, string_compare_func))) {
- r = -ENOMEM;
+ if (!m->swaps_by_proc_swaps) {
+ m->swaps_by_proc_swaps = hashmap_new(string_hash_func, string_compare_func);
+ if (!m->swaps_by_proc_swaps) {
+ r = log_oom();
goto fail;
}
+ }
free(p->what);
p->what = wp;
@@ -366,7 +377,8 @@ static int swap_add_one(
first = hashmap_get(m->swaps_by_proc_swaps, wp);
LIST_PREPEND(Swap, same_proc_swaps, first, SWAP(u));
- if ((r = hashmap_replace(m->swaps_by_proc_swaps, wp, first)) < 0)
+ r = hashmap_replace(m->swaps_by_proc_swaps, wp, first);
+ if (r < 0)
goto fail;
}
@@ -410,8 +422,9 @@ static int swap_process_new_swap(Manager *m, const char *device, int prio, bool
/* So this is a proper swap device. Create swap units
* for all names this swap device is known under */
- if (!(d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev)))
- return -ENOMEM;
+ d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev);
+ if (!d)
+ return log_oom();
dn = udev_device_get_devnode(d);
if (dn)
@@ -429,7 +442,8 @@ static int swap_process_new_swap(Manager *m, const char *device, int prio, bool
continue;
if (stat(p, &st) >= 0)
- if ((!S_ISBLK(st.st_mode)) || st.st_rdev != udev_device_get_devnum(d))
+ if ((!S_ISBLK(st.st_mode)) ||
+ st.st_rdev != udev_device_get_devnum(d))
continue;
k = swap_add_one(m, p, device, prio, false, false, set_flags);
@@ -473,7 +487,8 @@ static void swap_set_state(Swap *s, SwapState state) {
swap_state_to_string(old_state),
swap_state_to_string(state));
- unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true);
+ unit_notify(UNIT(s), state_translation_table[old_state],
+ state_translation_table[state], true);
}
static int swap_coldplug(Unit *u) {
@@ -501,10 +516,12 @@ static int swap_coldplug(Unit *u) {
if (s->control_pid <= 0)
return -EBADMSG;
- if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
+ r = unit_watch_pid(UNIT(s), s->control_pid);
+ if (r < 0)
return r;
- if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
+ r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch);
+ if (r < 0)
return r;
}
@@ -566,27 +583,30 @@ static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) {
assert(c);
assert(_pid);
- if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
+ r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch);
+ if (r < 0)
goto fail;
- if ((r = exec_spawn(c,
- NULL,
- &s->exec_context,
- NULL, 0,
- UNIT(s)->manager->environment,
- true,
- true,
- true,
- UNIT(s)->manager->confirm_spawn,
- UNIT(s)->cgroup_bondings,
- UNIT(s)->cgroup_attributes,
- NULL,
- UNIT(s)->id,
- NULL,
- &pid)) < 0)
+ r = exec_spawn(c,
+ NULL,
+ &s->exec_context,
+ NULL, 0,
+ UNIT(s)->manager->environment,
+ true,
+ true,
+ true,
+ UNIT(s)->manager->confirm_spawn,
+ UNIT(s)->cgroup_bondings,
+ UNIT(s)->cgroup_attributes,
+ NULL,
+ UNIT(s)->id,
+ NULL,
+ &pid);
+ if (r < 0)
goto fail;
- if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
+ r = unit_watch_pid(UNIT(s), pid);
+ if (r < 0)
/* FIXME: we need to do something here */
goto fail;
@@ -642,15 +662,18 @@ static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) {
if (s->kill_context.kill_mode == KILL_CONTROL_GROUP) {
- if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
- r = -ENOMEM;
+ pid_set = set_new(trivial_hash_func, trivial_compare_func);
+ if (!pid_set) {
+ r = log_oom();
goto fail;
}
/* Exclude the control pid from being killed via the cgroup */
- if (s->control_pid > 0)
- if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
+ if (s->control_pid > 0) {
+ r = set_put(pid_set, LONG_TO_PTR(s->control_pid));
+ if (r < 0)
goto fail;
+ }
r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, false, pid_set, NULL);
if (r < 0) {
@@ -665,7 +688,8 @@ static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) {
}
if (wait_for_exit) {
- if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
+ r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch);
+ if (r < 0)
goto fail;
swap_set_state(s, state);
@@ -721,7 +745,8 @@ static void swap_enter_activating(Swap *s) {
swap_unwatch_control_pid(s);
- if ((r = swap_spawn(s, s->control_command, &s->control_pid)) < 0)
+ r = swap_spawn(s, s->control_command, &s->control_pid);
+ if (r < 0)
goto fail;
swap_set_state(s, SWAP_ACTIVATING);
@@ -741,16 +766,17 @@ static void swap_enter_deactivating(Swap *s) {
s->control_command_id = SWAP_EXEC_DEACTIVATE;
s->control_command = s->exec_command + SWAP_EXEC_DEACTIVATE;
- if ((r = exec_command_set(
- s->control_command,
+ r = exec_command_set(s->control_command,
"/sbin/swapoff",
s->what,
- NULL)) < 0)
+ NULL);
+ if (r < 0)
goto fail;
swap_unwatch_control_pid(s);
- if ((r = swap_spawn(s, s->control_command, &s->control_pid)) < 0)
+ r = swap_spawn(s, s->control_command, &s->control_pid);
+ if (r < 0)
goto fail;
swap_set_state(s, SWAP_DEACTIVATING);
@@ -840,7 +866,8 @@ static int swap_deserialize_item(Unit *u, const char *key, const char *value, FD
if (streq(key, "state")) {
SwapState state;
- if ((state = swap_state_from_string(value)) < 0)
+ state = swap_state_from_string(value);
+ if (state < 0)
log_debug("Failed to parse state value %s", value);
else
s->deserialized_state = state;
@@ -863,7 +890,8 @@ static int swap_deserialize_item(Unit *u, const char *key, const char *value, FD
} else if (streq(key, "control-command")) {
SwapExecCommand id;
- if ((id = swap_exec_command_from_string(value)) < 0)
+ id = swap_exec_command_from_string(value);
+ if (id < 0)
log_debug("Failed to parse exec-command value %s", value);
else {
s->control_command_id = id;
@@ -1030,18 +1058,18 @@ static int swap_load_proc_swaps(Manager *m, bool set_flags) {
char *dev = NULL, *d;
int prio = 0, k;
- if ((k = fscanf(m->proc_swaps,
- "%ms " /* device/file */
- "%*s " /* type of swap */
- "%*s " /* swap size */
- "%*s " /* used */
- "%i\n", /* priority */
- &dev, &prio)) != 2) {
-
+ k = fscanf(m->proc_swaps,
+ "%ms " /* device/file */
+ "%*s " /* type of swap */
+ "%*s " /* swap size */
+ "%*s " /* used */
+ "%i\n", /* priority */
+ &dev, &prio);
+ if (k != 2) {
if (k == EOF)
break;
- log_warning("Failed to parse /proc/swaps:%u.", i);
+ log_warning("Failed to parse /proc/swaps:%u", i);
free(dev);
continue;
}
@@ -1080,7 +1108,8 @@ int swap_fd_event(Manager *m, int events) {
assert(m);
assert(events & EPOLLPRI);
- if ((r = swap_load_proc_swaps(m, true)) < 0) {
+ r = swap_load_proc_swaps(m, true);
+ if (r < 0) {
log_error("Failed to reread /proc/swaps: %s", strerror(-r));
/* Reset flags, just in case, for late calls */
@@ -1220,7 +1249,8 @@ static int swap_enumerate(Manager *m) {
assert(m);
if (!m->proc_swaps) {
- if (!(m->proc_swaps = fopen("/proc/swaps", "re")))
+ m->proc_swaps = fopen("/proc/swaps", "re");
+ if (!m->proc_swaps)
return (errno == ENOENT) ? 0 : -errno;
m->swap_watch.type = WATCH_SWAP;
@@ -1234,7 +1264,8 @@ static int swap_enumerate(Manager *m) {
return -errno;
}
- if ((r = swap_load_proc_swaps(m, false)) < 0)
+ r = swap_load_proc_swaps(m, false);
+ if (r < 0)
swap_shutdown(m);
return r;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-18 01:46:55 +0000