+static int whitelist_major(const char *path, const char *name, char type, const char *acc) {
+ _cleanup_fclose_ FILE *f = NULL;
+ char line[LINE_MAX];
+ bool good = false;
+ int r;
+
+ assert(path);
+ assert(acc);
+ assert(type == 'b' || type == 'c');
+
+ f = fopen("/proc/devices", "re");
+ if (!f)
+ return log_warning_errno(errno, "Cannot open /proc/devices to resolve %s (%c): %m", name, type);
+
+ FOREACH_LINE(line, f, goto fail) {
+ char buf[2+DECIMAL_STR_MAX(unsigned)+3+4], *p, *w;
+ unsigned maj;
+
+ truncate_nl(line);
+
+ if (type == 'c' && streq(line, "Character devices:")) {
+ good = true;
+ continue;
+ }
+
+ if (type == 'b' && streq(line, "Block devices:")) {
+ good = true;
+ continue;
+ }
+
+ if (isempty(line)) {
+ good = false;
+ continue;
+ }
+
+ if (!good)
+ continue;
+
+ p = strstrip(line);
+
+ w = strpbrk(p, WHITESPACE);
+ if (!w)
+ continue;
+ *w = 0;
+
+ r = safe_atou(p, &maj);
+ if (r < 0)
+ continue;
+ if (maj <= 0)
+ continue;
+
+ w++;
+ w += strspn(w, WHITESPACE);
+
+ if (fnmatch(name, w, 0) != 0)
+ continue;
+
+ sprintf(buf,
+ "%c %u:* %s",
+ type,
+ maj,
+ acc);
+
+ r = cg_set_attribute("devices", path, "devices.allow", buf);
+ if (r < 0)
+ log_full_errno(IN_SET(r, -ENOENT, -EROFS, -EINVAL, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
+ "Failed to set devices.allow on %s: %m", path);
+ }
+
+ return 0;
+
+fail:
+ log_warning_errno(errno, "Failed to read /proc/devices: %m");
+ return -errno;
+}
+
+static bool cgroup_context_has_io_config(CGroupContext *c) {
+ return c->io_accounting ||
+ c->io_weight != CGROUP_WEIGHT_INVALID ||
+ c->startup_io_weight != CGROUP_WEIGHT_INVALID ||
+ c->io_device_weights ||
+ c->io_device_limits;
+}
+
+static bool cgroup_context_has_blockio_config(CGroupContext *c) {
+ return c->blockio_accounting ||
+ c->blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID ||
+ c->startup_blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID ||
+ c->blockio_device_weights ||
+ c->blockio_device_bandwidths;
+}
+
+static uint64_t cgroup_context_io_weight(CGroupContext *c, ManagerState state) {
+ if (IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) &&
+ c->startup_io_weight != CGROUP_WEIGHT_INVALID)
+ return c->startup_io_weight;
+ else if (c->io_weight != CGROUP_WEIGHT_INVALID)
+ return c->io_weight;
+ else
+ return CGROUP_WEIGHT_DEFAULT;
+}
+
+static uint64_t cgroup_context_blkio_weight(CGroupContext *c, ManagerState state) {
+ if (IN_SET(state, MANAGER_STARTING, MANAGER_INITIALIZING) &&
+ c->startup_blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID)
+ return c->startup_blockio_weight;
+ else if (c->blockio_weight != CGROUP_BLKIO_WEIGHT_INVALID)
+ return c->blockio_weight;
+ else
+ return CGROUP_BLKIO_WEIGHT_DEFAULT;
+}
+
+static uint64_t cgroup_weight_blkio_to_io(uint64_t blkio_weight) {
+ return CLAMP(blkio_weight * CGROUP_WEIGHT_DEFAULT / CGROUP_BLKIO_WEIGHT_DEFAULT,
+ CGROUP_WEIGHT_MIN, CGROUP_WEIGHT_MAX);
+}
+
+static uint64_t cgroup_weight_io_to_blkio(uint64_t io_weight) {
+ return CLAMP(io_weight * CGROUP_BLKIO_WEIGHT_DEFAULT / CGROUP_WEIGHT_DEFAULT,
+ CGROUP_BLKIO_WEIGHT_MIN, CGROUP_BLKIO_WEIGHT_MAX);
+}
+
+static void cgroup_apply_io_device_weight(Unit *u, const char *dev_path, uint64_t io_weight) {
+ char buf[DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1];
+ dev_t dev;
+ int r;
+
+ r = lookup_block_device(dev_path, &dev);
+ if (r < 0)
+ return;
+
+ xsprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), io_weight);
+ r = cg_set_attribute("io", u->cgroup_path, "io.weight", buf);
+ if (r < 0)
+ log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
+ "Failed to set io.weight: %m");
+}
+
+static void cgroup_apply_blkio_device_weight(Unit *u, const char *dev_path, uint64_t blkio_weight) {
+ char buf[DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1];
+ dev_t dev;
+ int r;
+
+ r = lookup_block_device(dev_path, &dev);
+ if (r < 0)
+ return;
+
+ xsprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), blkio_weight);
+ r = cg_set_attribute("blkio", u->cgroup_path, "blkio.weight_device", buf);
+ if (r < 0)
+ log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
+ "Failed to set blkio.weight_device: %m");
+}
+
+static unsigned cgroup_apply_io_device_limit(Unit *u, const char *dev_path, uint64_t *limits) {
+ char limit_bufs[_CGROUP_IO_LIMIT_TYPE_MAX][DECIMAL_STR_MAX(uint64_t)];
+ char buf[DECIMAL_STR_MAX(dev_t)*2+2+(6+DECIMAL_STR_MAX(uint64_t)+1)*4];
+ CGroupIOLimitType type;
+ dev_t dev;
+ unsigned n = 0;
+ int r;
+
+ r = lookup_block_device(dev_path, &dev);
+ if (r < 0)
+ return 0;
+
+ for (type = 0; type < _CGROUP_IO_LIMIT_TYPE_MAX; type++) {
+ if (limits[type] != cgroup_io_limit_defaults[type]) {
+ xsprintf(limit_bufs[type], "%" PRIu64, limits[type]);
+ n++;
+ } else {
+ xsprintf(limit_bufs[type], "%s", limits[type] == CGROUP_LIMIT_MAX ? "max" : "0");
+ }
+ }
+
+ xsprintf(buf, "%u:%u rbps=%s wbps=%s riops=%s wiops=%s\n", major(dev), minor(dev),
+ limit_bufs[CGROUP_IO_RBPS_MAX], limit_bufs[CGROUP_IO_WBPS_MAX],
+ limit_bufs[CGROUP_IO_RIOPS_MAX], limit_bufs[CGROUP_IO_WIOPS_MAX]);
+ r = cg_set_attribute("io", u->cgroup_path, "io.max", buf);
+ if (r < 0)
+ log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
+ "Failed to set io.max: %m");
+ return n;
+}
+
+static unsigned cgroup_apply_blkio_device_limit(Unit *u, const char *dev_path, uint64_t rbps, uint64_t wbps) {
+ char buf[DECIMAL_STR_MAX(dev_t)*2+2+DECIMAL_STR_MAX(uint64_t)+1];
+ dev_t dev;
+ unsigned n = 0;
+ int r;
+
+ r = lookup_block_device(dev_path, &dev);
+ if (r < 0)
+ return 0;
+
+ if (rbps != CGROUP_LIMIT_MAX)
+ n++;
+ sprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), rbps);
+ r = cg_set_attribute("blkio", u->cgroup_path, "blkio.throttle.read_bps_device", buf);
+ if (r < 0)
+ log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
+ "Failed to set blkio.throttle.read_bps_device: %m");
+
+ if (wbps != CGROUP_LIMIT_MAX)
+ n++;
+ sprintf(buf, "%u:%u %" PRIu64 "\n", major(dev), minor(dev), wbps);
+ r = cg_set_attribute("blkio", u->cgroup_path, "blkio.throttle.write_bps_device", buf);
+ if (r < 0)
+ log_unit_full(u, IN_SET(r, -ENOENT, -EROFS, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
+ "Failed to set blkio.throttle.write_bps_device: %m");
+
+ return n;
+}
+
+static bool cgroup_context_has_unified_memory_config(CGroupContext *c) {
+ return c->memory_low > 0 || c->memory_high != CGROUP_LIMIT_MAX || c->memory_max != CGROUP_LIMIT_MAX;
+}
+
+static void cgroup_apply_unified_memory_limit(Unit *u, const char *file, uint64_t v) {
+ char buf[DECIMAL_STR_MAX(uint64_t) + 1] = "max";