mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-24 14:45:24 +00:00
5bf824ea10
Done using this command (also includes .c.in and .h.in files): for i in $(g ls-files|grep -E '\.[ch](\.in)?$'|grep -v gnulib); do expand -i $i > j && mv j $i;done
135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
/**
|
|
* section: Scheduling
|
|
* synopsis: Suspend a domain and then resume its execution
|
|
* purpose: Demonstrate the basic use of the library to suspend and
|
|
* resume a domain. If no id is given on the command line
|
|
* this script will suspend and resume the first domain found
|
|
* which is not Domain 0.
|
|
* usage: suspend [id]
|
|
* test: suspend
|
|
* author: Daniel Veillard
|
|
* copy: see Copyright for the status of this software.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <libvirt/libvirt.h>
|
|
|
|
static virConnectPtr conn = NULL; /* the hypervisor connection */
|
|
|
|
/**
|
|
* checkDomainState:
|
|
* @dom: the domain
|
|
*
|
|
* Return the current state of a domain or -1 if non-exsitant
|
|
*/
|
|
static int
|
|
checkDomainState(virDomainPtr dom) {
|
|
virDomainInfo info; /* the information being fetched */
|
|
int ret;
|
|
|
|
ret = virDomainGetInfo(dom, &info);
|
|
if (ret < 0) {
|
|
return(-1);
|
|
}
|
|
return(info.state);
|
|
}
|
|
|
|
/**
|
|
* SuspendAndResumeDomain:
|
|
* @id: the id of the domain
|
|
*
|
|
* extract the domain 0 information
|
|
*/
|
|
static void
|
|
SuspendAndResumeDomain(int id) {
|
|
virDomainPtr dom = NULL; /* the domain being checked */
|
|
int ret, state;
|
|
|
|
/* Find the domain of the given id */
|
|
dom = virDomainLookupByID(conn, id);
|
|
if (dom == NULL) {
|
|
fprintf(stderr, "Failed to find Domain %d\n", id);
|
|
goto error;
|
|
}
|
|
|
|
/* Check state */
|
|
state = checkDomainState(dom);
|
|
if ((state == VIR_DOMAIN_RUNNING) ||
|
|
(state == VIR_DOMAIN_NOSTATE) ||
|
|
(state == VIR_DOMAIN_BLOCKED)) {
|
|
printf("Suspending domain...\n");
|
|
ret = virDomainSuspend(dom);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Failed to suspend Domain %d\n", id);
|
|
goto error;
|
|
}
|
|
state = checkDomainState(dom);
|
|
if (state != VIR_DOMAIN_PAUSED) {
|
|
fprintf(stderr, "Domain %d state is not suspended\n", id);
|
|
} else {
|
|
printf("Domain suspended, resuming it...\n");
|
|
}
|
|
ret = virDomainResume(dom);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Failed to resume Domain %d\n", id);
|
|
goto error;
|
|
}
|
|
state = checkDomainState(dom);
|
|
if ((state == VIR_DOMAIN_RUNNING) ||
|
|
(state == VIR_DOMAIN_NOSTATE) ||
|
|
(state == VIR_DOMAIN_BLOCKED)) {
|
|
printf("Domain resumed\n");
|
|
} else {
|
|
fprintf(stderr, "Domain %d state indicate it is not resumed\n", id);
|
|
}
|
|
} else {
|
|
fprintf(stderr, "Domain %d is not in a state where it should be suspended\n", id);
|
|
goto error;
|
|
}
|
|
|
|
error:
|
|
if (dom != NULL)
|
|
virDomainFree(dom);
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
int id = 0;
|
|
|
|
/* NULL means connect to local Xen hypervisor */
|
|
conn = virConnectOpenReadOnly(NULL);
|
|
if (conn == NULL) {
|
|
fprintf(stderr, "Failed to connect to hypervisor\n");
|
|
goto error;
|
|
}
|
|
|
|
if (argc > 1) {
|
|
id = atoi(argv[1]);
|
|
}
|
|
if (id == 0) {
|
|
int i, j, ids[10];
|
|
i = virConnectListDomains(conn, &ids[0], 10);
|
|
if (i < 0) {
|
|
fprintf(stderr, "Failed to list the domains\n");
|
|
goto error;
|
|
}
|
|
for (j = 0;j < i;j++) {
|
|
if (ids[j] != 0) {
|
|
id = ids[j];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (id == 0) {
|
|
fprintf(stderr, "Failed find a running guest domain\n");
|
|
goto error;
|
|
}
|
|
|
|
SuspendAndResumeDomain(id);
|
|
|
|
error:
|
|
if (conn != NULL)
|
|
virConnectClose(conn);
|
|
return(0);
|
|
}
|