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core: when applying io/blkio per-device rules, don't remove them if they fail

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These devices might show up later, hence leave the rules as they are.
Applying the limits should not alter configuration.
This commit is contained in:
Lennart Poettering 2018-06-12 19:37:22 +02:00
parent ef31828d06
commit 17ae278097
1 changed files with 20 additions and 36 deletions
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56
src/core/cgroup.c
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@ -624,26 +624,22 @@ static void cgroup_apply_blkio_device_weight(Unit *u, const char *dev_path, uint
"Failed to set blkio.weight_device: %m");
}
static unsigned cgroup_apply_io_device_limit(Unit *u, const char *dev_path, uint64_t *limits) {
static void 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;
return;
for (type = 0; type < _CGROUP_IO_LIMIT_TYPE_MAX; type++) {
if (limits[type] != cgroup_io_limit_defaults[type]) {
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 {
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],
@ -652,36 +648,28 @@ static unsigned cgroup_apply_io_device_limit(Unit *u, const char *dev_path, uint
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) {
static void 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;
return;
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) {
@ -832,16 +820,15 @@ static void cgroup_context_apply(
/* Apply limits and free ones without config. */
if (has_io) {
CGroupIODeviceLimit *l, *next;
CGroupIODeviceLimit *l;
LIST_FOREACH(device_limits, l, c->io_device_limits)
cgroup_apply_io_device_limit(u, l->path, l->limits);
LIST_FOREACH_SAFE(device_limits, l, next, c->io_device_limits) {
if (!cgroup_apply_io_device_limit(u, l->path, l->limits))
cgroup_context_free_io_device_limit(c, l);
}
} else if (has_blockio) {
CGroupBlockIODeviceBandwidth *b, *next;
CGroupBlockIODeviceBandwidth *b;
LIST_FOREACH_SAFE(device_bandwidths, b, next, c->blockio_device_bandwidths) {
LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) {
uint64_t limits[_CGROUP_IO_LIMIT_TYPE_MAX];
CGroupIOLimitType type;
@ -854,8 +841,7 @@ static void cgroup_context_apply(
log_cgroup_compat(u, "Applying BlockIO{Read|Write}Bandwidth %" PRIu64 " %" PRIu64 " as IO{Read|Write}BandwidthMax for %s",
b->rbps, b->wbps, b->path);
if (!cgroup_apply_io_device_limit(u, b->path, limits))
cgroup_context_free_blockio_device_bandwidth(c, b);
cgroup_apply_io_device_limit(u, b->path, limits);
}
}
}
@ -909,21 +895,19 @@ static void cgroup_context_apply(
/* Apply limits and free ones without config. */
if (has_io) {
CGroupIODeviceLimit *l, *next;
CGroupIODeviceLimit *l;
LIST_FOREACH_SAFE(device_limits, l, next, c->io_device_limits) {
LIST_FOREACH(device_limits, l, c->io_device_limits) {
log_cgroup_compat(u, "Applying IO{Read|Write}Bandwidth %" PRIu64 " %" PRIu64 " as BlockIO{Read|Write}BandwidthMax for %s",
l->limits[CGROUP_IO_RBPS_MAX], l->limits[CGROUP_IO_WBPS_MAX], l->path);
if (!cgroup_apply_blkio_device_limit(u, l->path, l->limits[CGROUP_IO_RBPS_MAX], l->limits[CGROUP_IO_WBPS_MAX]))
cgroup_context_free_io_device_limit(c, l);
cgroup_apply_blkio_device_limit(u, l->path, l->limits[CGROUP_IO_RBPS_MAX], l->limits[CGROUP_IO_WBPS_MAX]);
}
} else if (has_blockio) {
CGroupBlockIODeviceBandwidth *b, *next;
CGroupBlockIODeviceBandwidth *b;
LIST_FOREACH_SAFE(device_bandwidths, b, next, c->blockio_device_bandwidths)
if (!cgroup_apply_blkio_device_limit(u, b->path, b->rbps, b->wbps))
cgroup_context_free_blockio_device_bandwidth(c, b);
LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths)
cgroup_apply_blkio_device_limit(u, b->path, b->rbps, b->wbps);
}
}