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systemcl: add support for setting BlockIORead/WriteBandwidth for unit

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This patch allows user to set up BlockIOReadBandwidth and BlockIOWriteBandwidth
for unit through systemctl. Such as

systemctl set-property sshd.service BlockIOReadBandwidth="/dev/sda 100000"
systemctl set-property sshd.service BlockIOWriteBandwidth="/dev/sda 200000"
This commit is contained in:
Gao feng
2013-09-10 17:29:55 +02:00
committed by Lennart Poettering
parent f004c2ca11
commit 670612567b
1 changed files with 51 additions and 0 deletions
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src/systemctl/systemctl.c
+51
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@@ -3685,6 +3685,11 @@ static int append_assignment(DBusMessageIter *iter, const char *assignment) {
rwm = "";
}
if (!path_startswith(path, "/dev")) {
log_error("%s is not a device file in /dev.", path);
return -EINVAL;
}
if (!dbus_message_iter_open_container(&sub2, DBUS_TYPE_STRUCT, NULL, &sub3) ||
!dbus_message_iter_append_basic(&sub3, DBUS_TYPE_STRING, &path) ||
!dbus_message_iter_append_basic(&sub3, DBUS_TYPE_STRING, &rwm) ||
@@ -3695,6 +3700,52 @@ static int append_assignment(DBusMessageIter *iter, const char *assignment) {
if (!dbus_message_iter_close_container(&sub, &sub2))
return log_oom();
} else if (streq(field, "BlockIOReadBandwidth") || streq(field, "BlockIOWriteBandwidth")) {
DBusMessageIter sub2;
if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT, "a(st)", &sub) ||
!dbus_message_iter_open_container(&sub, DBUS_TYPE_ARRAY, "(st)", &sub2))
return log_oom();
if (!isempty(eq)) {
const char *path, *bandwidth;
DBusMessageIter sub3;
uint64_t u;
off_t bytes;
char *e;
e = strchr(eq, ' ');
if (e) {
path = strndupa(eq, e - eq);
bandwidth = e+1;
} else {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
if (!path_startswith(path, "/dev")) {
log_error("%s is not a device file in /dev.", path);
return -EINVAL;
}
r = parse_bytes(bandwidth, &bytes);
if (r < 0) {
log_error("Failed to parse byte value %s.", bandwidth);
return -EINVAL;
}
u = (uint64_t) bytes;
if (!dbus_message_iter_open_container(&sub2, DBUS_TYPE_STRUCT, NULL, &sub3) ||
!dbus_message_iter_append_basic(&sub3, DBUS_TYPE_STRING, &path) ||
!dbus_message_iter_append_basic(&sub3, DBUS_TYPE_UINT64, &u) ||
!dbus_message_iter_close_container(&sub2, &sub3))
return log_oom();
}
if (!dbus_message_iter_close_container(&sub, &sub2))
return log_oom();
} else {
log_error("Unknown assignment %s.", assignment);
return -EINVAL;