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#include <config.h>
#include "virerror.h"
#include "virfile.h"
#include "storage_backend_vstorage.h"
#include "virlog.h"
#include "virutil.h"
#include <mntent.h>
#include <paths.h>
#include <pwd.h>
#include <grp.h>
#include <unistd.h>
#include "storage_util.h"
#define VIR_FROM_THIS VIR_FROM_STORAGE
VIR_LOG_INIT("storage.storage_backend_vstorage");
/**
* @pool storage pool to build
* @flags controls the pool formatting behaviour
*
* Does not support @flags, if provided an error will occur.
*
* Returns 0 on success, -1 on error
*/
static int
virStorageBackendVzPoolBuild(virStoragePoolObj *pool,
unsigned int flags)
{
virCheckFlags(0, -1);
return virStorageBackendBuildLocal(pool);
}
static int
virStorageBackendVzPoolStart(virStoragePoolObj *pool)
{
virStoragePoolDef *def = virStoragePoolObjGetDef(pool);
g_autofree char *grp_name = NULL;
g_autofree char *usr_name = NULL;
g_autofree char *mode = NULL;
g_autoptr(virCommand) cmd = NULL;
int ret;
/* Check the permissions */
if (def->target.perms.mode == (mode_t)-1)
def->target.perms.mode = VIR_STORAGE_DEFAULT_POOL_PERM_MODE;
if (def->target.perms.uid == (uid_t)-1)
def->target.perms.uid = geteuid();
if (def->target.perms.gid == (gid_t)-1)
def->target.perms.gid = getegid();
/* Convert ids to names because vstorage uses names */
if (!(grp_name = virGetGroupName(def->target.perms.gid)))
return -1;
if (!(usr_name = virGetUserName(def->target.perms.uid)))
return -1;
mode = g_strdup_printf("%o", def->target.perms.mode);
cmd = virCommandNewArgList("vstorage-mount",
"-c", def->source.name,
def->target.path,
"-m", mode,
"-g", grp_name, "-u", usr_name,
NULL);
/* Mounting a shared FS might take a long time. Don't hold
* the pool locked meanwhile. */
virObjectUnlock(pool);
ret = virCommandRun(cmd, NULL);
virObjectLock(pool);
return ret;
}
static int
virStorageBackendVzIsMounted(virStoragePoolObj *pool)
{
int ret = -1;
virStoragePoolDef *def = virStoragePoolObjGetDef(pool);
FILE *mtab;
struct mntent ent;
char buf[1024];
g_autofree char *cluster = NULL;
cluster = g_strdup_printf("vstorage://%s", def->source.name);
if ((mtab = fopen(_PATH_MOUNTED, "r")) == NULL) {
virReportSystemError(errno,
_("cannot read mount list '%1$s'"),
_PATH_MOUNTED);
goto cleanup;
}
while ((getmntent_r(mtab, &ent, buf, sizeof(buf))) != NULL) {
if (STREQ(ent.mnt_dir, def->target.path) &&
STREQ(ent.mnt_fsname, cluster)) {
ret = 1;
goto cleanup;
}
}
ret = 0;
cleanup:
VIR_FORCE_FCLOSE(mtab);
return ret;
}
static int
virStorageBackendVzPoolStop(virStoragePoolObj *pool)
{
virStoragePoolDef *def = virStoragePoolObjGetDef(pool);
int rc;
g_autoptr(virCommand) cmd = NULL;
/* Short-circuit if already unmounted */
if ((rc = virStorageBackendVzIsMounted(pool)) != 1)
return rc;
cmd = virCommandNewArgList("umount", def->target.path, NULL);
return virCommandRun(cmd, NULL);
}
/*
* Check whether the cluster is mounted
*/
static int
virStorageBackendVzCheck(virStoragePoolObj *pool,
bool *isActive)
{
int ret = -1;
*isActive = false;
if ((ret = virStorageBackendVzIsMounted(pool)) != 0) {
if (ret < 0)
return -1;
*isActive = true;
}
return 0;
}
virStorageBackend virStorageBackendVstorage = {
.type = VIR_STORAGE_POOL_VSTORAGE,
.buildPool = virStorageBackendVzPoolBuild,
.startPool = virStorageBackendVzPoolStart,
.stopPool = virStorageBackendVzPoolStop,
.deletePool = virStorageBackendDeleteLocal,
.refreshPool = virStorageBackendRefreshLocal,
.checkPool = virStorageBackendVzCheck,
.buildVol = virStorageBackendVolBuildLocal,
.buildVolFrom = virStorageBackendVolBuildFromLocal,
.createVol = virStorageBackendVolCreateLocal,
.refreshVol = virStorageBackendVolRefreshLocal,
.deleteVol = virStorageBackendVolDeleteLocal,
.resizeVol = virStorageBackendVolResizeLocal,
.uploadVol = virStorageBackendVolUploadLocal,
.downloadVol = virStorageBackendVolDownloadLocal,
.wipeVol = virStorageBackendVolWipeLocal,
};
int
virStorageBackendVstorageRegister(void)
{
return virStorageBackendRegister(&virStorageBackendVstorage);
}
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