#include "os-util.h"
#include "parse-util.h"
#include "path-util.h"
+#include "percent-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
+#include "psi-util.h"
#include "selinux-util.h"
#include "smack-util.h"
+#include "special.h"
#include "stat-util.h"
#include "string-table.h"
#include "string-util.h"
#include "tomoyo-util.h"
-#include "user-record.h"
+#include "udev-util.h"
+#include "uid-alloc-range.h"
#include "user-util.h"
-#include "util.h"
#include "virt.h"
Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate) {
}
Condition* condition_free_list_type(Condition *head, ConditionType type) {
- Condition *c, *n;
-
- LIST_FOREACH_SAFE(conditions, c, n, head)
+ LIST_FOREACH(conditions, c, head)
if (type < 0 || c->type == type) {
LIST_REMOVE(conditions, head, c);
condition_free(c);
return k > 0;
default:
- assert_not_reached("unknown order");
+ assert_not_reached();
}
}
return a == b;
}
-#define DTCOMPAT_FILE "/sys/firmware/devicetree/base/compatible"
+#define DTCOMPAT_FILE "/proc/device-tree/compatible"
static int condition_test_firmware_devicetree_compatible(const char *dtcarg) {
int r;
_cleanup_free_ char *dtcompat = NULL;
return false;
}
- /*
- * /sys/firmware/devicetree/base/compatible consists of one or more
- * strings, each ending in '\0'. So the last character in dtcompat must
- * be a '\0'.
- */
+ /* /proc/device-tree/compatible consists of one or more strings, each ending in '\0'.
+ * So the last character in dtcompat must be a '\0'. */
if (dtcompat[size - 1] != '\0') {
log_debug("%s is in an unknown format, assuming machine is incompatible", DTCOMPAT_FILE);
return false;
static int condition_test_environment(Condition *c, char **env) {
bool equal;
- char **i;
assert(c);
assert(c->parameter);
}
static int condition_test_path_is_read_write(Condition *c, char **env) {
+ int r;
+
assert(c);
assert(c->parameter);
assert(c->type == CONDITION_PATH_IS_READ_WRITE);
- return path_is_read_only_fs(c->parameter) <= 0;
+ r = path_is_read_only_fs(c->parameter);
+
+ return r <= 0 && r != -ENOENT;
}
static int condition_test_cpufeature(Condition *c, char **env) {
assert(c->type == CONDITION_DIRECTORY_NOT_EMPTY);
r = dir_is_empty(c->parameter);
- return r <= 0 && r != -ENOENT;
+ return r <= 0 && !IN_SET(r, -ENOENT, -ENOTDIR);
}
static int condition_test_file_not_empty(Condition *c, char **env) {
(st.st_mode & 0111));
}
+static int condition_test_psi(Condition *c, char **env) {
+ _cleanup_free_ char *first = NULL, *second = NULL, *third = NULL, *fourth = NULL, *pressure_path = NULL;
+ const char *p, *value, *pressure_type;
+ loadavg_t *current, limit;
+ ResourcePressure pressure;
+ int r;
+
+ assert(c);
+ assert(c->parameter);
+ assert(IN_SET(c->type, CONDITION_MEMORY_PRESSURE, CONDITION_CPU_PRESSURE, CONDITION_IO_PRESSURE));
+
+ if (!is_pressure_supported()) {
+ log_debug("Pressure Stall Information (PSI) is not supported, skipping.");
+ return 1;
+ }
+
+ pressure_type = c->type == CONDITION_MEMORY_PRESSURE ? "memory" :
+ c->type == CONDITION_CPU_PRESSURE ? "cpu" :
+ "io";
+
+ p = c->parameter;
+ r = extract_many_words(&p, ":", 0, &first, &second, NULL);
+ if (r <= 0)
+ return log_debug_errno(r < 0 ? r : SYNTHETIC_ERRNO(EINVAL), "Failed to parse condition parameter %s: %m", c->parameter);
+ /* If only one parameter is passed, then we look at the global system pressure rather than a specific cgroup. */
+ if (r == 1) {
+ pressure_path = path_join("/proc/pressure", pressure_type);
+ if (!pressure_path)
+ return log_oom_debug();
+
+ value = first;
+ } else {
+ const char *controller = strjoina(pressure_type, ".pressure");
+ _cleanup_free_ char *slice_path = NULL, *root_scope = NULL;
+ CGroupMask mask, required_mask;
+ char *slice, *e;
+
+ required_mask = c->type == CONDITION_MEMORY_PRESSURE ? CGROUP_MASK_MEMORY :
+ c->type == CONDITION_CPU_PRESSURE ? CGROUP_MASK_CPU :
+ CGROUP_MASK_IO;
+
+ slice = strstrip(first);
+ if (!slice)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to parse condition parameter %s: %m", c->parameter);
+
+ r = cg_all_unified();
+ if (r < 0)
+ return log_debug_errno(r, "Failed to determine whether the unified cgroups hierarchy is used: %m");
+ if (r == 0) {
+ log_debug("PSI condition check requires the unified cgroups hierarchy, skipping.");
+ return 1;
+ }
+
+ r = cg_mask_supported(&mask);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to get supported cgroup controllers: %m");
+
+ if (!FLAGS_SET(mask, required_mask)) {
+ log_debug("Cgroup %s controller not available, skipping PSI condition check.", pressure_type);
+ return 1;
+ }
+
+ r = cg_slice_to_path(slice, &slice_path);
+ if (r < 0)
+ return log_debug_errno(r, "Cannot determine slice \"%s\" cgroup path: %m", slice);
+
+ /* We might be running under the user manager, so get the root path and prefix it accordingly. */
+ r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, getpid_cached(), &root_scope);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to get root cgroup path: %m");
+
+ /* Drop init.scope, we want the parent. We could get an empty or / path, but that's fine,
+ * just skip it in that case. */
+ e = endswith(root_scope, "/" SPECIAL_INIT_SCOPE);
+ if (e)
+ *e = 0;
+ if (!empty_or_root(root_scope)) {
+ _cleanup_free_ char *slice_joined = NULL;
+
+ slice_joined = path_join(root_scope, slice_path);
+ if (!slice_joined)
+ return log_oom_debug();
+
+ free_and_replace(slice_path, slice_joined);
+ }
+
+ r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, slice_path, controller, &pressure_path);
+ if (r < 0)
+ return log_debug_errno(r, "Error getting cgroup pressure path from %s: %m", slice_path);
+
+ value = second;
+ }
+
+ /* If a value including a specific timespan (in the intervals allowed by the kernel),
+ * parse it, otherwise we assume just a plain percentage that will be checked if it is
+ * smaller or equal to the current pressure average over 5 minutes. */
+ r = extract_many_words(&value, "/", 0, &third, &fourth, NULL);
+ if (r <= 0)
+ return log_debug_errno(r < 0 ? r : SYNTHETIC_ERRNO(EINVAL), "Failed to parse condition parameter %s: %m", c->parameter);
+ if (r == 1)
+ current = &pressure.avg300;
+ else {
+ const char *timespan;
+
+ timespan = skip_leading_chars(fourth, NULL);
+ if (!timespan)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to parse condition parameter %s: %m", c->parameter);
+
+ if (startswith(timespan, "10sec"))
+ current = &pressure.avg10;
+ else if (startswith(timespan, "1min"))
+ current = &pressure.avg60;
+ else if (startswith(timespan, "5min"))
+ current = &pressure.avg300;
+ else
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to parse condition parameter %s: %m", c->parameter);
+ }
+
+ value = strstrip(third);
+ if (!value)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to parse condition parameter %s: %m", c->parameter);
+
+ r = parse_permyriad(value);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to parse permyriad: %s", c->parameter);
+
+ r = store_loadavg_fixed_point(r / 100LU, r % 100LU, &limit);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to parse loadavg: %s", c->parameter);
+
+ r = read_resource_pressure(pressure_path, PRESSURE_TYPE_FULL, &pressure);
+ if (r == -ENODATA) /* cpu.pressure 'full' was added recently, fall back to 'some'. */
+ r = read_resource_pressure(pressure_path, PRESSURE_TYPE_SOME, &pressure);
+ if (r == -ENOENT) {
+ /* We already checked that /proc/pressure exists, so this means we were given a cgroup
+ * that doesn't exist or doesn't exist any longer. */
+ log_debug("\"%s\" not found, skipping PSI check.", pressure_path);
+ return 1;
+ }
+ if (r < 0)
+ return log_debug_errno(r, "Error parsing pressure from %s: %m", pressure_path);
+
+ return *current <= limit;
+}
+
int condition_test(Condition *c, char **env) {
static int (*const condition_tests[_CONDITION_TYPE_MAX])(Condition *c, char **env) = {
[CONDITION_ENVIRONMENT] = condition_test_environment,
[CONDITION_CPU_FEATURE] = condition_test_cpufeature,
[CONDITION_OS_RELEASE] = condition_test_osrelease,
+ [CONDITION_MEMORY_PRESSURE] = condition_test_psi,
+ [CONDITION_CPU_PRESSURE] = condition_test_psi,
+ [CONDITION_IO_PRESSURE] = condition_test_psi,
};
int r, b;
condition_test_logger_t logger,
void *userdata) {
- Condition *c;
int triggered = -1;
assert(!!logger == !!to_string);
}
void condition_dump_list(Condition *first, FILE *f, const char *prefix, condition_to_string_t to_string) {
- Condition *c;
-
LIST_FOREACH(conditions, c, first)
condition_dump(c, f, prefix, to_string);
}
[CONDITION_ENVIRONMENT] = "ConditionEnvironment",
[CONDITION_CPU_FEATURE] = "ConditionCPUFeature",
[CONDITION_OS_RELEASE] = "ConditionOSRelease",
+ [CONDITION_MEMORY_PRESSURE] = "ConditionMemoryPressure",
+ [CONDITION_CPU_PRESSURE] = "ConditionCPUPressure",
+ [CONDITION_IO_PRESSURE] = "ConditionIOPressure",
};
DEFINE_STRING_TABLE_LOOKUP(condition_type, ConditionType);
[CONDITION_ENVIRONMENT] = "AssertEnvironment",
[CONDITION_CPU_FEATURE] = "AssertCPUFeature",
[CONDITION_OS_RELEASE] = "AssertOSRelease",
+ [CONDITION_MEMORY_PRESSURE] = "AssertMemoryPressure",
+ [CONDITION_CPU_PRESSURE] = "AssertCPUPressure",
+ [CONDITION_IO_PRESSURE] = "AssertIOPressure",
};
DEFINE_STRING_TABLE_LOOKUP(assert_type, ConditionType);
projects / thirdparty / systemd.git / blobdiff