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introduce lxcapi_rename for renaming containers

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lxcapi_rename implemented as a convenience function as lately
I find myself in a need to rename a container due to a
typo in its name. I could have started over but didn't want
to spend more time (to installing extra packages and changing
their configuration) on it.

c->clone() followed by c->destroy() did the trick for me and I
though it could be helpful to the other people, so here it is.

Signed-off-by: S.Çağlar Onur <caglar@10ur.org>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
This commit is contained in:
S.Çağlar Onur 2013-12-14 00:41:25 -05:00 committed by Serge Hallyn
parent 713893cdbc
commit 06e5650eab
2 changed files with 43 additions and 0 deletions
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33
src/lxc/lxccontainer.c
View File

@ -2596,6 +2596,38 @@ out:
return NULL;
}
static bool lxcapi_rename(struct lxc_container *c, const char *newname)
{
struct bdev *bdev;
struct lxc_container *newc;
int flags = LXC_CLONE_KEEPMACADDR | LXC_CLONE_COPYHOOKS;
if (!c || !c->name || !c->config_path)
return false;
bdev = bdev_init(c->lxc_conf->rootfs.path, c->lxc_conf->rootfs.mount, NULL);
if (!bdev) {
ERROR("Failed to find original backing store type");
return false;
}
newc = lxcapi_clone(c, newname, c->config_path, flags, NULL, bdev->type, 0, NULL);
bdev_put(bdev);
if (!newc) {
lxc_container_put(newc);
return false;
}
if (newc && lxcapi_is_defined(newc))
lxc_container_put(newc);
if (!lxcapi_destroy(c)) {
ERROR("Could not destroy existing container %s", c->name);
return false;
}
return true;
}
static int lxcapi_attach(struct lxc_container *c, lxc_attach_exec_t exec_function, void *exec_payload, lxc_attach_options_t *options, pid_t *attached_process)
{
if (!c)
@ -3139,6 +3171,7 @@ struct lxc_container *lxc_container_new(const char *name, const char *configpath
c->wait = lxcapi_wait;
c->set_config_item = lxcapi_set_config_item;
c->destroy = lxcapi_destroy;
c->rename = lxcapi_rename;
c->save_config = lxcapi_save_config;
c->get_keys = lxcapi_get_keys;
c->create = lxcapi_create;

10
src/lxc/lxccontainer.h
View File

@ -325,6 +325,16 @@ struct lxc_container {
bool (*createl)(struct lxc_container *c, const char *t, const char *bdevtype,
struct bdev_specs *specs, int flags, ...);
/*!
* \brief Rename a container
*
* \param c Container.
* \param newname New name to be used for the container.
*
* \return \c true on success, else \c false.
*/
bool (*rename)(struct lxc_container *c, const char *newname);
/*!
* \brief Request the container reboot by sending it \c SIGINT.
*