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/*
* storage_backend_sheepdog.c: storage backend for Sheepdog handling
*
* Copyright (C) 2012 Wido den Hollander
* Copyright (C) 2012 Frank Spijkerman
* Copyright (C) 2012 Sebastian Wiedenroth
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; If not, see
* <http://www.gnu.org/licenses/>.
*
* Author: Wido den Hollander <wido@widodh.nl>
* Frank Spijkerman <frank.spijkerman@avira.com>
* Sebastian Wiedenroth <sebastian.wiedenroth@skylime.net>
*/
#include <config.h>
#include "virterror_internal.h"
#include "storage_backend_sheepdog.h"
#include "storage_conf.h"
#include "util/command.h"
#include "util.h"
#include "memory.h"
#include "logging.h"
#define VIR_FROM_THIS VIR_FROM_STORAGE
static int virStorageBackendSheepdogRefreshVol(virConnectPtr conn,
virStoragePoolObjPtr pool,
virStorageVolDefPtr vol);
void virStorageBackendSheepdogAddHostArg(virCommandPtr cmd,
virStoragePoolObjPtr pool);
int
virStorageBackendSheepdogParseNodeInfo(virStoragePoolDefPtr pool,
char *output)
{
/* fields:
* node id/total, size, used, use%, [total vdi size]
*
* example output:
* 0 15245667872 117571104 0%
* Total 15245667872 117571104 0% 20972341
*/
const char *p, *next;
pool->allocation = pool->capacity = pool->available = 0;
p = output;
do {
char *end;
if ((next = strchr(p, '\n')))
++next;
else
return -1;
if (!STRPREFIX(p, "Total "))
continue;
p = p + 6;
if (virStrToLong_ull(p, &end, 10, &pool->capacity) < 0)
return -1;
if ((p = end + 1) > next)
return -1;
if (virStrToLong_ull(p, &end, 10, &pool->allocation) < 0)
return -1;
pool->available = pool->capacity - pool->allocation;
return 0;
} while ((p = next));
return -1;
}
void
virStorageBackendSheepdogAddHostArg(virCommandPtr cmd,
virStoragePoolObjPtr pool)
{
const char *address = "localhost";
int port = 7000;
if (pool->def->source.nhost > 0) {
if (pool->def->source.hosts[0].name != NULL) {
address = pool->def->source.hosts[0].name;
}
if (pool->def->source.hosts[0].port) {
port = pool->def->source.hosts[0].port;
}
}
virCommandAddArg(cmd, "-a");
virCommandAddArgFormat(cmd, "%s", address);
virCommandAddArg(cmd, "-p");
virCommandAddArgFormat(cmd, "%d", port);
}
static int
virStorageBackendSheepdogRefreshPool(virConnectPtr conn ATTRIBUTE_UNUSED,
virStoragePoolObjPtr pool)
{
int ret;
char *output = NULL;
virCommandPtr cmd;
cmd = virCommandNewArgList(COLLIE, "node", "info", "-r", NULL);
virStorageBackendSheepdogAddHostArg(cmd, pool);
virCommandSetOutputBuffer(cmd, &output);
ret = virCommandRun(cmd, NULL);
if (ret == 0)
ret = virStorageBackendSheepdogParseNodeInfo(pool->def, output);
virCommandFree(cmd);
VIR_FREE(output);
return ret;
}
static int
virStorageBackendSheepdogDeleteVol(virConnectPtr conn ATTRIBUTE_UNUSED,
virStoragePoolObjPtr pool,
virStorageVolDefPtr vol,
unsigned int flags)
{
virCheckFlags(0, -1);
virCommandPtr cmd = virCommandNewArgList(COLLIE, "vdi", "delete", vol->name, NULL);
virStorageBackendSheepdogAddHostArg(cmd, pool);
int ret = virCommandRun(cmd, NULL);
virCommandFree(cmd);
return ret;
}
static int
virStorageBackendSheepdogCreateVol(virConnectPtr conn ATTRIBUTE_UNUSED,
virStoragePoolObjPtr pool,
virStorageVolDefPtr vol)
{
int ret;
if (vol->target.encryption != NULL) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Sheepdog does not support encrypted volumes"));
return -1;
}
virCommandPtr cmd = virCommandNewArgList(COLLIE, "vdi", "create", vol->name, NULL);
virCommandAddArgFormat(cmd, "%llu", vol->capacity);
virStorageBackendSheepdogAddHostArg(cmd, pool);
ret = virCommandRun(cmd, NULL);
virStorageBackendSheepdogRefreshVol(conn, pool, vol);
virCommandFree(cmd);
return ret;
}
int
virStorageBackendSheepdogParseVdiList(virStorageVolDefPtr vol,
char *output)
{
/* fields:
* current/clone/snapshot, name, id, size, used, shared, creation time, vdi id, [tag]
*
* example output:
* s test 1 10 0 0 1336556634 7c2b25
* s test 2 10 0 0 1336557203 7c2b26
* = test 3 10 0 0 1336557216 7c2b27
*/
int id;
const char *p, *next;
vol->allocation = vol->capacity = 0;
p = output;
do {
char *end;
if ((next = strchr(p, '\n')))
++next;
/* ignore snapshots */
if (*p != '=')
continue;
/* skip space */
if (p + 2 < next) {
p += 2;
} else {
return -1;
}
/* skip name */
while (*p != '\0' && *p != ' ') {
if (*p == '\\')
++p;
++p;
}
if (virStrToLong_i(p, &end, 10, &id) < 0)
return -1;
p = end + 1;
if (virStrToLong_ull(p, &end, 10, &vol->capacity) < 0)
return -1;
p = end + 1;
if (virStrToLong_ull(p, &end, 10, &vol->allocation) < 0)
return -1;
return 0;
} while ((p = next));
return -1;
}
static int
virStorageBackendSheepdogRefreshVol(virConnectPtr conn ATTRIBUTE_UNUSED,
virStoragePoolObjPtr pool,
virStorageVolDefPtr vol)
{
int ret;
char *output = NULL;
virCommandPtr cmd = virCommandNewArgList(COLLIE, "vdi", "list", vol->name, "-r", NULL);
virStorageBackendSheepdogAddHostArg(cmd, pool);
virCommandSetOutputBuffer(cmd, &output);
ret = virCommandRun(cmd, NULL);
if (ret < 0)
goto cleanup;
if ((ret = virStorageBackendSheepdogParseVdiList(vol, output)) < 0)
goto cleanup;
vol->type = VIR_STORAGE_VOL_NETWORK;
VIR_FREE(vol->key);
if (virAsprintf(&vol->key, "%s/%s",
pool->def->source.name, vol->name) == -1) {
virReportOOMError();
goto cleanup;
}
VIR_FREE(vol->target.path);
if (virAsprintf(&vol->target.path, "%s", vol->name) == -1) {
virReportOOMError();
goto cleanup;
}
cleanup:
virCommandFree(cmd);
return ret;
}
static int
virStorageBackendSheepdogResizeVol(virConnectPtr conn ATTRIBUTE_UNUSED,
virStoragePoolObjPtr pool,
virStorageVolDefPtr vol,
unsigned long long capacity,
unsigned int flags)
{
virCheckFlags(0, -1);
virCommandPtr cmd = virCommandNewArgList(COLLIE, "vdi", "resize", vol->name, NULL);
virCommandAddArgFormat(cmd, "%llu", capacity);
virStorageBackendSheepdogAddHostArg(cmd, pool);
int ret = virCommandRun(cmd, NULL);
virCommandFree(cmd);
return ret;
}
virStorageBackend virStorageBackendSheepdog = {
.type = VIR_STORAGE_POOL_SHEEPDOG,
.refreshPool = virStorageBackendSheepdogRefreshPool,
.createVol = virStorageBackendSheepdogCreateVol,
.refreshVol = virStorageBackendSheepdogRefreshVol,
.deleteVol = virStorageBackendSheepdogDeleteVol,
.resizeVol = virStorageBackendSheepdogResizeVol,
};
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