#include "alloc-util.h"
#include "build.h"
+#include "cgroup-util.h"
//#include "def.h"
#include "dirent-util.h"
#include "fd-util.h"
int saved_argc = 0;
char **saved_argv = NULL;
+static int saved_in_initrd = -1;
size_t page_size(void) {
static thread_local size_t pgsz = 0;
if (r < 0)
return log_oom();
- path = strjoin(*directory, "/", de->d_name, NULL);
+ path = strjoin(*directory, "/", de->d_name);
if (!path)
return log_oom();
/* Detach from stdout/stderr. and reopen
* /dev/tty for them. This is important to
- * ensure that when loginctl is started via
+ * ensure that when systemctl is started via
* popen() or a similar call that expects to
* read EOF we actually do generate EOF and
- * not delay this indefinitely because we
+ * not delay this indefinitely by because we
* keep an unused copy of stdin around. */
fd = open("/dev/tty", O_WRONLY);
if (fd < 0) {
}
bool in_initrd(void) {
- static int saved = -1;
struct statfs s;
- if (saved >= 0)
- return saved;
+ if (saved_in_initrd >= 0)
+ return saved_in_initrd;
/* We make two checks here:
*
* 2. the root file system must be a memory file system
*
* The second check is extra paranoia, since misdetecting an
- * initrd can have bad bad consequences due the initrd
+ * initrd can have bad consequences due the initrd
* emptying when transititioning to the main systemd.
*/
- saved = access("/etc/initrd-release", F_OK) >= 0 &&
- statfs("/", &s) >= 0 &&
- is_temporary_fs(&s);
+ saved_in_initrd = access("/etc/initrd-release", F_OK) >= 0 &&
+ statfs("/", &s) >= 0 &&
+ is_temporary_fs(&s);
- return saved;
+ return saved_in_initrd;
+}
+
+void in_initrd_force(bool value) {
+ saved_in_initrd = value;
}
#if 0 /// UNNEEDED by elogind
u = nmemb;
while (l < u) {
idx = (l + u) / 2;
- p = (void *)(((const char *) base) + (idx * size));
+ p = (const char *) base + idx * size;
comparison = compar(key, p, arg);
if (comparison < 0)
u = idx;
return found_online || !found_offline;
}
-bool id128_is_valid(const char *s) {
- size_t i, l;
-
- l = strlen(s);
- if (l == 32) {
-
- /* Simple formatted 128bit hex string */
-
- for (i = 0; i < l; i++) {
- char c = s[i];
-
- if (!(c >= '0' && c <= '9') &&
- !(c >= 'a' && c <= 'z') &&
- !(c >= 'A' && c <= 'Z'))
- return false;
- }
-
- } else if (l == 36) {
-
- /* Formatted UUID */
-
- for (i = 0; i < l; i++) {
- char c = s[i];
-
- if ((i == 8 || i == 13 || i == 18 || i == 23)) {
- if (c != '-')
- return false;
- } else {
- if (!(c >= '0' && c <= '9') &&
- !(c >= 'a' && c <= 'z') &&
- !(c >= 'A' && c <= 'Z'))
- return false;
- }
- }
-
- } else
- return false;
-
- return true;
-}
#endif // 0
-
int container_get_leader(const char *machine, pid_t *pid) {
_cleanup_free_ char *s = NULL, *class = NULL;
const char *p;
}
uint64_t physical_memory(void) {
- long mem;
+ _cleanup_free_ char *root = NULL, *value = NULL;
+ uint64_t mem, lim;
+ size_t ps;
+ long sc;
+
+ /* We return this as uint64_t in case we are running as 32bit process on a 64bit kernel with huge amounts of
+ * memory.
+ *
+ * In order to support containers nicely that have a configured memory limit we'll take the minimum of the
+ * physically reported amount of memory and the limit configured for the root cgroup, if there is any. */
+
+ sc = sysconf(_SC_PHYS_PAGES);
+ assert(sc > 0);
+
+ ps = page_size();
+ mem = (uint64_t) sc * (uint64_t) ps;
+
+ if (cg_get_root_path(&root) < 0)
+ return mem;
+
+ if (cg_get_attribute("memory", root, "memory.limit_in_bytes", &value))
+ return mem;
+
+ if (safe_atou64(value, &lim) < 0)
+ return mem;
+
+ /* Make sure the limit is a multiple of our own page size */
+ lim /= ps;
+ lim *= ps;
+
+ return MIN(mem, lim);
+}
+
+uint64_t physical_memory_scale(uint64_t v, uint64_t max) {
+ uint64_t p, m, ps, r;
+
+ assert(max > 0);
+
+ /* Returns the physical memory size, multiplied by v divided by max. Returns UINT64_MAX on overflow. On success
+ * the result is a multiple of the page size (rounds down). */
+
+ ps = page_size();
+ assert(ps > 0);
+
+ p = physical_memory() / ps;
+ assert(p > 0);
+
+ m = p * v;
+ if (m / p != v)
+ return UINT64_MAX;
+
+ m /= max;
+
+ r = m * ps;
+ if (r / ps != m)
+ return UINT64_MAX;
+
+ return r;
+}
+
+uint64_t system_tasks_max(void) {
+
+#if SIZEOF_PID_T == 4
+#define TASKS_MAX ((uint64_t) (INT32_MAX-1))
+#elif SIZEOF_PID_T == 2
+#define TASKS_MAX ((uint64_t) (INT16_MAX-1))
+#else
+#error "Unknown pid_t size"
+#endif
+
+ _cleanup_free_ char *value = NULL, *root = NULL;
+ uint64_t a = TASKS_MAX, b = TASKS_MAX;
+
+ /* Determine the maximum number of tasks that may run on this system. We check three sources to determine this
+ * limit:
+ *
+ * a) the maximum value for the pid_t type
+ * b) the cgroups pids_max attribute for the system
+ * c) the kernel's configure maximum PID value
+ *
+ * And then pick the smallest of the three */
+
+ if (read_one_line_file("/proc/sys/kernel/pid_max", &value) >= 0)
+ (void) safe_atou64(value, &a);
+
+ if (cg_get_root_path(&root) >= 0) {
+ value = mfree(value);
+
+ if (cg_get_attribute("pids", root, "pids.max", &value) >= 0)
+ (void) safe_atou64(value, &b);
+ }
+
+ return MIN3(TASKS_MAX,
+ a <= 0 ? TASKS_MAX : a,
+ b <= 0 ? TASKS_MAX : b);
+}
+
+uint64_t system_tasks_max_scale(uint64_t v, uint64_t max) {
+ uint64_t t, m;
+
+ assert(max > 0);
+
+ /* Multiply the system's task value by the fraction v/max. Hence, if max==100 this calculates percentages
+ * relative to the system's maximum number of tasks. Returns UINT64_MAX on overflow. */
- /* We return this as uint64_t in case we are running as 32bit
- * process on a 64bit kernel with huge amounts of memory */
+ t = system_tasks_max();
+ assert(t > 0);
- mem = sysconf(_SC_PHYS_PAGES);
- assert(mem > 0);
+ m = t * v;
+ if (m / t != v) /* overflow? */
+ return UINT64_MAX;
- return (uint64_t) mem * (uint64_t) page_size();
+ return m / max;
}
#if 0 /// UNNEEDED by elogind
~ianmdlvl / elogind.git / blobdiff