<term><varname>CPUShares=</varname></term>
<listitem><para>Assign the specified
- overall CPU time shares to the processes executed. Takes
- an integer value. This controls the
+ overall CPU time shares to the
+ processes executed. Takes an integer
+ value. This controls the
<literal>cpu.shares</literal> control
- group attribute. For details about
- this control group attribute see <ulink
+ group attribute, which defaults to
+ 1024. For details about this control
+ group attribute see <ulink
url="http://www.kernel.org/doc/Documentation/scheduler/sched-design-CFS.txt">sched-design-CFS.txt</ulink>.</para></listitem>
</varlistentry>
size. Takes a memory size in bytes. If
the value is suffixed with K, M, G or
T the specified memory size is parsed
- as Kilobytes, Megabytes, Gigabytes
+ as Kilobytes, Megabytes, Gigabytes,
resp. Terabytes (to the base
1024). This controls the
<literal>memory.limit_in_bytes</literal>
url="http://www.kernel.org/doc/Documentation/cgroups/devices.txt">devices.txt</ulink>.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>BlockIOWeight=</varname></term>
+
+ <listitem><para>Set the default or
+ per-device overall block IO weight
+ value for the executed
+ processes. Takes either a single
+ weight value (between 10 and 1000) to
+ set the default block IO weight, or a
+ space separated pair of a device node
+ path and a weight value to specify the
+ device specific weight value (Example:
+ "/dev/sda 500"). This controls the
+ <literal>blkio.weight</literal> and
+ <literal>blkio.weight_device</literal>
+ control group attributes, which
+ default to 1000. Use this option
+ multiple times to set weights for
+ multiple devices. For details about
+ these control group attributes see
+ <ulink
+ url="http://www.kernel.org/doc/Documentation/cgroups/blkio-controller.txt">blkio-controller.txt</ulink>.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>BlockIOReadBandwidth=</varname></term>
+ <term><varname>BlockIOWriteBandwidth=</varname></term>
+
+ <listitem><para>Set the per-device
+ overall block IO bandwith limit for the
+ executed processes. Takes a space
+ separated pair of a device node path
+ and a bandwith value (in bytes per
+ second) to specify the device specific
+ bandwidth. If the bandwith is suffixed
+ with K, M, G, or T the specified
+ bandwith is parsed as Kilobytes,
+ Megabytes, Gigabytes, resp. Terabytes
+ (Example: "/dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0 5M"). This
+ controls the
+ <literal>blkio.read_bps_device</literal>
+ and
+ <literal>blkio.write_bps_device</literal>
+ control group attributes. Use this
+ option multiple times to set bandwith
+ limits for multiple devices. For
+ details about these control group
+ attributes see <ulink
+ url="http://www.kernel.org/doc/Documentation/cgroups/blkio-controller.txt">blkio-controller.txt</ulink>.</para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><varname>ReadWriteDirectories=</varname></term>
<term><varname>ReadOnlyDirectories=</varname></term>
$1.MemorySoftLimit, config_parse_unit_memory_limit, 0, 0
$1.DeviceAllow, config_parse_unit_device_allow, 0, 0
$1.DeviceDeny, config_parse_unit_device_allow, 0, 0
+$1.BlockIOWeight, config_parse_unit_blkio_weight, 0, 0
+$1.BlockIOReadBandwidth, config_parse_unit_blkio_bandwidth, 0, 0
+$1.BlockIOWriteBandwidth, config_parse_unit_blkio_bandwidth, 0, 0
$1.ReadWriteDirectories, config_parse_path_strv, 0, offsetof($1, exec_context.read_write_dirs)
$1.ReadOnlyDirectories, config_parse_path_strv, 0, offsetof($1, exec_context.read_only_dirs)
$1.InaccessibleDirectories, config_parse_path_strv, 0, offsetof($1, exec_context.inaccessible_dirs)
}
static int device_map(const char *controller, const char *name, const char *value, char **ret) {
- struct stat st;
char **l;
+ assert(controller);
+ assert(name);
+ assert(value);
+ assert(ret);
+
l = strv_split_quoted(value);
if (!l)
return -ENOMEM;
}
} else {
- if (lstat(l[0], &st) < 0) {
+ struct stat st;
+
+ if (stat(l[0], &st) < 0) {
log_warning("Couldn't stat device %s", l[0]);
strv_free(l);
return -errno;
return 0;
}
+static int blkio_map(const char *controller, const char *name, const char *value, char **ret) {
+ struct stat st;
+ char **l;
+
+ assert(controller);
+ assert(name);
+ assert(value);
+ assert(ret);
+
+ l = strv_split_quoted(value);
+ if (!l)
+ return -ENOMEM;
+
+ assert(strv_length(l) == 2);
+
+ if (stat(l[0], &st) < 0) {
+ log_warning("Couldn't stat device %s", l[0]);
+ strv_free(l);
+ return -errno;
+ }
+
+ if (!S_ISBLK(st.st_mode)) {
+ log_warning("%s is not a block device.", l[0]);
+ strv_free(l);
+ return -ENODEV;
+ }
+
+ if (asprintf(ret, "%u:%u %s", major(st.st_rdev), minor(st.st_rdev), l[1]) < 0) {
+ strv_free(l);
+ return -ENOMEM;
+ }
+
+ strv_free(l);
+ return 0;
+}
+
+int config_parse_unit_blkio_weight(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) {
+ Unit *u = data;
+ int r;
+ unsigned long ul;
+ const char *device = NULL, *weight;
+ unsigned k;
+ char *t, **l;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ l = strv_split_quoted(rvalue);
+ if (!l)
+ return -ENOMEM;
+
+ k = strv_length(l);
+ if (k < 1 || k > 2) {
+ log_error("[%s:%u] Failed to parse weight value, ignoring: %s", filename, line, rvalue);
+ strv_free(l);
+ return 0;
+ }
+
+ if (k == 1)
+ weight = l[0];
+ else {
+ device = l[0];
+ weight = l[1];
+ }
+
+ if (device && !path_startswith(device, "/dev/")) {
+ log_error("[%s:%u] Failed to parse block device node value, ignoring: %s", filename, line, rvalue);
+ strv_free(l);
+ return 0;
+ }
+
+ if (safe_atolu(weight, &ul) < 0 || ul < 10 || ul > 1000) {
+ log_error("[%s:%u] Failed to parse block IO weight value, ignoring: %s", filename, line, rvalue);
+ strv_free(l);
+ return 0;
+ }
+
+ if (device)
+ r = asprintf(&t, "%s %lu", device, ul);
+ else
+ r = asprintf(&t, "%lu", ul);
+ strv_free(l);
+
+ if (r < 0)
+ return -ENOMEM;
+
+ if (device)
+ r = unit_add_cgroup_attribute(u, "blkio", "blkio.weight_device", t, blkio_map);
+ else
+ r = unit_add_cgroup_attribute(u, "blkio", "blkio.weight", t, NULL);
+ free(t);
+
+ if (r < 0) {
+ log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ return 0;
+}
+
+int config_parse_unit_blkio_bandwidth(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) {
+ Unit *u = data;
+ int r;
+ off_t bytes;
+ unsigned k;
+ char *t, **l;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ l = strv_split_quoted(rvalue);
+ if (!l)
+ return -ENOMEM;
+
+ k = strv_length(l);
+ if (k != 2) {
+ log_error("[%s:%u] Failed to parse bandwidth value, ignoring: %s", filename, line, rvalue);
+ strv_free(l);
+ return 0;
+ }
+
+ if (!path_startswith(l[0], "/dev/")) {
+ log_error("[%s:%u] Failed to parse block device node value, ignoring: %s", filename, line, rvalue);
+ strv_free(l);
+ return 0;
+ }
+
+ if (parse_bytes(l[1], &bytes) < 0 || bytes <= 0) {
+ log_error("[%s:%u] Failed to parse block IO bandwith value, ignoring: %s", filename, line, rvalue);
+ strv_free(l);
+ return 0;
+ }
+
+ r = asprintf(&t, "%s %llu", l[0], (unsigned long long) bytes);
+ strv_free(l);
+
+ if (r < 0)
+ return -ENOMEM;
+
+ r = unit_add_cgroup_attribute(u, "blkio",
+ streq(lvalue, "BlockIOReadBandwidth") ? "blkio.read_bps_device" : "blkio.write_bps_device",
+ t, blkio_map);
+ free(t);
+
+ if (r < 0) {
+ log_error("[%s:%u] Failed to add cgroup attribute value, ignoring: %s", filename, line, rvalue);
+ return 0;
+ }
+
+ return 0;
+}
+
+
#define FOLLOW_MAX 8
static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
int config_parse_unit_cpu_shares(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_unit_memory_limit(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_unit_device_allow(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_unit_blkio_weight(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_unit_blkio_bandwidth(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
/* gperf prototypes */
const struct ConfigPerfItem* load_fragment_gperf_lookup(const char *key, unsigned length);
projects / systemd / commitdiff