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Avoid double lxc-freeze/unfreeze

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If we call lxc-freeze multiple times for an already frozen container, LXC
triggers useless freezing by writing into the "freezer.state" cgroup file.
This is the same when we call lxc-unfreeze multiple times.
Checking the current state with a LXC_CMD_GET_STATE
(calling c->state) would permit to check if the container is FROZEN
or not.

Signed-off-by: Rachid Koucha <rachid.koucha@gmail.com>
This commit is contained in:
Rachid Koucha 2019-01-26 23:46:34 +01:00 committed by GitHub
parent 5283a1182e
commit 2341916a03
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 14 additions and 6 deletions
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20
src/lxc/lxccontainer.c
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@ -525,13 +525,17 @@ WRAP_API(bool, lxcapi_is_running)
static bool do_lxcapi_freeze(struct lxc_container *c)
{
int ret;
lxc_state_t s;
if (!c)
return false;
ret = lxc_freeze(c->lxc_conf, c->name, c->config_path);
if (ret < 0)
return false;
s = lxc_getstate(c->name, c->config_path);
if (s != FROZEN) {
ret = lxc_freeze(c->lxc_conf, c->name, c->config_path);
if (ret < 0)
return false;
}
return true;
}
@ -541,13 +545,17 @@ WRAP_API(bool, lxcapi_freeze)
static bool do_lxcapi_unfreeze(struct lxc_container *c)
{
int ret;
lxc_state_t s;
if (!c)
return false;
ret = lxc_unfreeze(c->lxc_conf, c->name, c->config_path);
if (ret < 0)
return false;
s = lxc_getstate(c->name, c->config_path);
if (s == FROZEN) {
ret = lxc_unfreeze(c->lxc_conf, c->name, c->config_path);
if (ret < 0)
return false;
}
return true;
}