/**
* Update info about a volume's capacity/allocation
*/
static int
virStorageBackendFileSystemVolRefresh(virConnectPtr conn,
virStoragePoolObjPtr pool ATTRIBUTE_UNUSED,
virStorageVolDefPtr vol)
{
int ret;
/* Refresh allocation / permissions info in case its changed */
ret = virStorageBackendUpdateVolInfo(vol, 0);
if (ret < 0)
return ret;
/* Load any secrets if posible */
if (vol->target.encryption &&
vol->target.encryption->format == VIR_STORAGE_ENCRYPTION_FORMAT_QCOW &&
vol->target.encryption->nsecrets == 0) {
virSecretPtr sec;
virStorageEncryptionSecretPtr encsec = NULL;
sec = virSecretLookupByUsage(conn,
VIR_SECRET_USAGE_TYPE_VOLUME,
vol->target.path);
if (sec) {
if (VIR_ALLOC_N(vol->target.encryption->secrets, 1) < 0 ||
VIR_ALLOC(encsec) < 0) {
VIR_FREE(vol->target.encryption->secrets);
virReportOOMError();
virSecretFree(sec);
return -1;
}
vol->target.encryption->nsecrets = 1;
vol->target.encryption->secrets[0] = encsec;
encsec->type = VIR_STORAGE_ENCRYPTION_SECRET_TYPE_PASSPHRASE;
virSecretGetUUID(sec, encsec->uuid);
virSecretFree(sec);
}
}
return 0;
}
static int
virStorageBackendMpathNewVol(virStoragePoolObjPtr pool,
const int devnum,
const char *dev)
{
virStorageVolDefPtr vol;
int ret = -1;
if (VIR_ALLOC(vol) < 0)
goto cleanup;
vol->type = VIR_STORAGE_VOL_BLOCK;
if (virAsprintf(&(vol->name), "dm-%u", devnum) < 0)
goto cleanup;
if (virAsprintf(&vol->target.path, "/dev/%s", dev) < 0)
goto cleanup;
if (virStorageBackendUpdateVolInfo(vol, true,
VIR_STORAGE_VOL_OPEN_DEFAULT) < 0) {
goto cleanup;
}
/* XXX should use logical unit's UUID instead */
if (VIR_STRDUP(vol->key, vol->target.path) < 0)
goto cleanup;
if (VIR_APPEND_ELEMENT_COPY(pool->volumes.objs, pool->volumes.count, vol) < 0)
goto cleanup;
pool->def->capacity += vol->target.capacity;
pool->def->allocation += vol->target.allocation;
ret = 0;
cleanup:
if (ret != 0)
virStorageVolDefFree(vol);
return ret;
}
static int
virStorageBackendLogicalMakeVol(virStoragePoolObjPtr pool,
char **const groups,
void *data)
{
virStorageVolDefPtr vol = NULL;
bool is_new_vol = false;
unsigned long long offset, size, length;
const char *regex_unit = "(\\S+)\\((\\S+)\\)";
char *regex = NULL;
regex_t *reg = NULL;
regmatch_t *vars = NULL;
char *p = NULL;
size_t i;
int err, nextents, nvars, ret = -1;
const char *attrs = groups[9];
/* Skip inactive volume */
if (attrs[4] != 'a')
return 0;
/*
* Skip thin pools(t). These show up in normal lvs output
* but do not have a corresponding /dev/$vg/$lv device that
* is created by udev. This breaks assumptions in later code.
*/
if (attrs[0] == 't')
return 0;
/* See if we're only looking for a specific volume */
if (data != NULL) {
vol = data;
if (STRNEQ(vol->name, groups[0]))
return 0;
}
/* Or filling in more data on an existing volume */
if (vol == NULL)
vol = virStorageVolDefFindByName(pool, groups[0]);
/* Or a completely new volume */
if (vol == NULL) {
if (VIR_ALLOC(vol) < 0)
return -1;
is_new_vol = true;
vol->type = VIR_STORAGE_VOL_BLOCK;
if (VIR_STRDUP(vol->name, groups[0]) < 0)
goto cleanup;
if (VIR_REALLOC_N(pool->volumes.objs,
pool->volumes.count + 1))
goto cleanup;
}
if (vol->target.path == NULL) {
if (virAsprintf(&vol->target.path, "%s/%s",
pool->def->target.path, vol->name) < 0)
goto cleanup;
}
/* Skips the backingStore of lv created with "--virtualsize",
* its original device "/dev/$vgname/$lvname_vorigin" is
* just for lvm internal use, one should never use it.
*
* (lvs outputs "[$lvname_vorigin] for field "origin" if the
* lv is created with "--virtualsize").
*/
if (groups[1] && !STREQ(groups[1], "") && (groups[1][0] != '[')) {
if (virAsprintf(&vol->backingStore.path, "%s/%s",
pool->def->target.path, groups[1]) < 0)
goto cleanup;
vol->backingStore.format = VIR_STORAGE_POOL_LOGICAL_LVM2;
}
if (!vol->key && VIR_STRDUP(vol->key, groups[2]) < 0)
goto cleanup;
if (virStorageBackendUpdateVolInfo(vol, 1) < 0)
goto cleanup;
nextents = 1;
if (STREQ(groups[4], VIR_STORAGE_VOL_LOGICAL_SEGTYPE_STRIPED)) {
if (virStrToLong_i(groups[5], NULL, 10, &nextents) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("malformed volume extent stripes value"));
goto cleanup;
}
}
/* Finally fill in extents information */
if (VIR_REALLOC_N(vol->source.extents,
vol->source.nextent + nextents) < 0)
goto cleanup;
if (virStrToLong_ull(groups[6], NULL, 10, &length) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("malformed volume extent length value"));
goto cleanup;
}
if (virStrToLong_ull(groups[7], NULL, 10, &size) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("malformed volume extent size value"));
goto cleanup;
}
if (virStrToLong_ull(groups[8], NULL, 10, &vol->allocation) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("malformed volume allocation value"));
goto cleanup;
}
/* Now parse the "devices" field separately */
if (VIR_STRDUP(regex, regex_unit) < 0)
goto cleanup;
for (i = 1; i < nextents; i++) {
if (VIR_REALLOC_N(regex, strlen(regex) + strlen(regex_unit) + 2) < 0)
goto cleanup;
/* "," is the separator of "devices" field */
strcat(regex, ",");
strncat(regex, regex_unit, strlen(regex_unit));
}
if (VIR_ALLOC(reg) < 0)
goto cleanup;
/* Each extent has a "path:offset" pair, and vars[0] will
* be the whole matched string.
*/
nvars = (nextents * 2) + 1;
if (VIR_ALLOC_N(vars, nvars) < 0)
goto cleanup;
err = regcomp(reg, regex, REG_EXTENDED);
if (err != 0) {
char error[100];
regerror(err, reg, error, sizeof(error));
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to compile regex %s"),
error);
goto cleanup;
}
err = regexec(reg, groups[3], nvars, vars, 0);
regfree(reg);
if (err != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("malformed volume extent devices value"));
goto cleanup;
}
p = groups[3];
/* vars[0] is skipped */
for (i = 0; i < nextents; i++) {
size_t j;
int len;
char *offset_str = NULL;
j = (i * 2) + 1;
len = vars[j].rm_eo - vars[j].rm_so;
p[vars[j].rm_eo] = '\0';
if (VIR_STRNDUP(vol->source.extents[vol->source.nextent].path,
p + vars[j].rm_so, len) < 0)
goto cleanup;
len = vars[j + 1].rm_eo - vars[j + 1].rm_so;
if (VIR_STRNDUP(offset_str, p + vars[j + 1].rm_so, len) < 0)
goto cleanup;
if (virStrToLong_ull(offset_str, NULL, 10, &offset) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("malformed volume extent offset value"));
VIR_FREE(offset_str);
goto cleanup;
}
VIR_FREE(offset_str);
vol->source.extents[vol->source.nextent].start = offset * size;
vol->source.extents[vol->source.nextent].end = (offset * size) + length;
vol->source.nextent++;
}
if (is_new_vol)
pool->volumes.objs[pool->volumes.count++] = vol;
ret = 0;
cleanup:
VIR_FREE(regex);
VIR_FREE(reg);
VIR_FREE(vars);
if (is_new_vol && (ret == -1))
virStorageVolDefFree(vol);
return ret;
}
/*
* Attempt to create a new LUN
*
* Returns:
*
* 0 => Success
* -1 => Failure due to some sort of OOM or other fatal issue found when
* attempting to get/update information about a found volume
* -2 => Failure to find a stable path, not fatal, caller can try another
*/
static int
virStorageBackendSCSINewLun(virStoragePoolObjPtr pool,
uint32_t host ATTRIBUTE_UNUSED,
uint32_t bus,
uint32_t target,
uint32_t lun,
const char *dev)
{
virStorageVolDefPtr vol = NULL;
char *devpath = NULL;
int retval = -1;
/* Check if the pool is using a stable target path. The call to
* virStorageBackendStablePath will fail if the pool target path
* isn't stable and just return the strdup'd 'devpath' anyway.
* This would be indistinguishable to failing to find the stable
* path to the device if the virDirRead loop to search the
* target pool path for our devpath had failed.
*/
if (!virStorageBackendPoolPathIsStable(pool->def->target.path) &&
!(STREQ(pool->def->target.path, "/dev") ||
STREQ(pool->def->target.path, "/dev/"))) {
virReportError(VIR_ERR_INVALID_ARG,
_("unable to use target path '%s' for dev '%s'"),
NULLSTR(pool->def->target.path), dev);
goto cleanup;
}
if (VIR_ALLOC(vol) < 0)
goto cleanup;
vol->type = VIR_STORAGE_VOL_BLOCK;
/* 'host' is dynamically allocated by the kernel, first come,
* first served, per HBA. As such it isn't suitable for use
* in the volume name. We only need uniqueness per-pool, so
* just leave 'host' out
*/
if (virAsprintf(&(vol->name), "unit:%u:%u:%u", bus, target, lun) < 0)
goto cleanup;
if (virAsprintf(&devpath, "/dev/%s", dev) < 0)
goto cleanup;
VIR_DEBUG("Trying to create volume for '%s'", devpath);
/* Now figure out the stable path
*
* XXX this method is O(N) because it scans the pool target
* dir every time its run. Should figure out a more efficient
* way of doing this...
*/
if ((vol->target.path = virStorageBackendStablePath(pool,
devpath,
true)) == NULL)
goto cleanup;
if (STREQ(devpath, vol->target.path) &&
!(STREQ(pool->def->target.path, "/dev") ||
STREQ(pool->def->target.path, "/dev/"))) {
VIR_DEBUG("No stable path found for '%s' in '%s'",
devpath, pool->def->target.path);
retval = -2;
goto cleanup;
}
/* Allow a volume read failure to ignore or skip this block file */
if ((retval = virStorageBackendUpdateVolInfo(vol, true,
VIR_STORAGE_VOL_OPEN_DEFAULT,
VIR_STORAGE_VOL_READ_NOERROR)) < 0)
goto cleanup;
if (!(vol->key = virStorageBackendSCSISerial(vol->target.path)))
goto cleanup;
pool->def->capacity += vol->target.capacity;
pool->def->allocation += vol->target.allocation;
if (VIR_APPEND_ELEMENT(pool->volumes.objs, pool->volumes.count, vol) < 0)
goto cleanup;
vol = NULL;
retval = 0;
cleanup:
virStorageVolDefFree(vol);
VIR_FREE(devpath);
return retval;
}
static int
virStorageBackendLogicalMakeVol(virStoragePoolObjPtr pool,
char **const groups,
void *data)
{
virStorageVolDefPtr vol = NULL;
unsigned long long offset, size, length;
/* See if we're only looking for a specific volume */
if (data != NULL) {
vol = data;
if (STRNEQ(vol->name, groups[0]))
return 0;
}
/* Or filling in more data on an existing volume */
if (vol == NULL)
vol = virStorageVolDefFindByName(pool, groups[0]);
/* Or a completely new volume */
if (vol == NULL) {
if (VIR_ALLOC(vol) < 0) {
virReportOOMError();
return -1;
}
vol->type = VIR_STORAGE_VOL_BLOCK;
if ((vol->name = strdup(groups[0])) == NULL) {
virReportOOMError();
virStorageVolDefFree(vol);
return -1;
}
if (VIR_REALLOC_N(pool->volumes.objs,
pool->volumes.count + 1)) {
virReportOOMError();
virStorageVolDefFree(vol);
return -1;
}
pool->volumes.objs[pool->volumes.count++] = vol;
}
if (vol->target.path == NULL) {
if (virAsprintf(&vol->target.path, "%s/%s",
pool->def->target.path, vol->name) < 0) {
virReportOOMError();
virStorageVolDefFree(vol);
return -1;
}
}
if (groups[1] && !STREQ(groups[1], "")) {
if (virAsprintf(&vol->backingStore.path, "%s/%s",
pool->def->target.path, groups[1]) < 0) {
virReportOOMError();
virStorageVolDefFree(vol);
return -1;
}
vol->backingStore.format = VIR_STORAGE_POOL_LOGICAL_LVM2;
}
if (vol->key == NULL &&
(vol->key = strdup(groups[2])) == NULL) {
virReportOOMError();
return -1;
}
if (virStorageBackendUpdateVolInfo(vol, 1) < 0)
return -1;
/* Finally fill in extents information */
if (VIR_REALLOC_N(vol->source.extents,
vol->source.nextent + 1) < 0) {
virReportOOMError();
return -1;
}
if ((vol->source.extents[vol->source.nextent].path =
strdup(groups[3])) == NULL) {
virReportOOMError();
return -1;
}
if (virStrToLong_ull(groups[4], NULL, 10, &offset) < 0) {
virStorageReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("malformed volume extent offset value"));
return -1;
}
if (virStrToLong_ull(groups[5], NULL, 10, &length) < 0) {
virStorageReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("malformed volume extent length value"));
return -1;
}
if (virStrToLong_ull(groups[6], NULL, 10, &size) < 0) {
virStorageReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("malformed volume extent size value"));
return -1;
}
vol->source.extents[vol->source.nextent].start = offset * size;
vol->source.extents[vol->source.nextent].end = (offset * size) + length;
vol->source.nextent++;
return 0;
}
static int
virStorageBackendSCSINewLun(virStoragePoolObjPtr pool,
uint32_t host ATTRIBUTE_UNUSED,
uint32_t bus,
uint32_t target,
uint32_t lun,
const char *dev)
{
virStorageVolDefPtr vol;
char *devpath = NULL;
int retval = 0;
if (VIR_ALLOC(vol) < 0) {
retval = -1;
goto out;
}
vol->type = VIR_STORAGE_VOL_BLOCK;
/* 'host' is dynamically allocated by the kernel, first come,
* first served, per HBA. As such it isn't suitable for use
* in the volume name. We only need uniqueness per-pool, so
* just leave 'host' out
*/
if (virAsprintf(&(vol->name), "unit:%u:%u:%u", bus, target, lun) < 0) {
retval = -1;
goto free_vol;
}
if (virAsprintf(&devpath, "/dev/%s", dev) < 0) {
retval = -1;
goto free_vol;
}
VIR_DEBUG("Trying to create volume for '%s'", devpath);
/* Now figure out the stable path
*
* XXX this method is O(N) because it scans the pool target
* dir every time its run. Should figure out a more efficient
* way of doing this...
*/
if ((vol->target.path = virStorageBackendStablePath(pool,
devpath,
true)) == NULL) {
retval = -1;
goto free_vol;
}
if (STREQ(devpath, vol->target.path) &&
!(STREQ(pool->def->target.path, "/dev") ||
STREQ(pool->def->target.path, "/dev/"))) {
VIR_DEBUG("No stable path found for '%s' in '%s'",
devpath, pool->def->target.path);
retval = -1;
goto free_vol;
}
if (virStorageBackendUpdateVolInfo(vol, true,
VIR_STORAGE_VOL_OPEN_DEFAULT) < 0) {
retval = -1;
goto free_vol;
}
if (!(vol->key = virStorageBackendSCSISerial(vol->target.path))) {
retval = -1;
goto free_vol;
}
pool->def->capacity += vol->target.capacity;
pool->def->allocation += vol->target.allocation;
if (VIR_APPEND_ELEMENT(pool->volumes.objs, pool->volumes.count, vol) < 0) {
retval = -1;
goto free_vol;
}
goto out;
free_vol:
virStorageVolDefFree(vol);
out:
VIR_FREE(devpath);
return retval;
}
static int
virStorageBackendDiskMakeDataVol(virStoragePoolObjPtr pool,
char **const groups,
virStorageVolDefPtr vol)
{
char *tmp, *devpath;
if (vol == NULL) {
if (VIR_ALLOC(vol) < 0) {
virReportOOMError();
return -1;
}
if (VIR_REALLOC_N(pool->volumes.objs,
pool->volumes.count+1) < 0) {
virReportOOMError();
virStorageVolDefFree(vol);
return -1;
}
pool->volumes.objs[pool->volumes.count++] = vol;
/* Prepended path will be same for all partitions, so we can
* strip the path to form a reasonable pool-unique name
*/
tmp = strrchr(groups[0], '/');
if ((vol->name = strdup(tmp ? tmp + 1 : groups[0])) == NULL) {
virReportOOMError();
return -1;
}
}
if (vol->target.path == NULL) {
if ((devpath = strdup(groups[0])) == NULL) {
virReportOOMError();
return -1;
}
/* Now figure out the stable path
*
* XXX this method is O(N) because it scans the pool target
* dir every time its run. Should figure out a more efficient
* way of doing this...
*/
vol->target.path = virStorageBackendStablePath(pool, devpath, true);
VIR_FREE(devpath);
if (vol->target.path == NULL)
return -1;
}
if (vol->key == NULL) {
/* XXX base off a unique key of the underlying disk */
if ((vol->key = strdup(vol->target.path)) == NULL) {
virReportOOMError();
return -1;
}
}
if (vol->source.extents == NULL) {
if (VIR_ALLOC(vol->source.extents) < 0) {
virReportOOMError();
return -1;
}
vol->source.nextent = 1;
if (virStrToLong_ull(groups[3], NULL, 10,
&vol->source.extents[0].start) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("cannot parse device start location"));
return -1;
}
if (virStrToLong_ull(groups[4], NULL, 10,
&vol->source.extents[0].end) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("cannot parse device end location"));
return -1;
}
if ((vol->source.extents[0].path =
strdup(pool->def->source.devices[0].path)) == NULL) {
virReportOOMError();
return -1;
}
}
/* Refresh allocation/capacity/perms */
if (virStorageBackendUpdateVolInfo(vol, 1) < 0)
return -1;
/* set partition type */
if (STREQ(groups[1], "normal"))
vol->target.type = VIR_STORAGE_VOL_DISK_TYPE_PRIMARY;
else if (STREQ(groups[1], "logical"))
vol->target.type = VIR_STORAGE_VOL_DISK_TYPE_LOGICAL;
else if (STREQ(groups[1], "extended"))
vol->target.type = VIR_STORAGE_VOL_DISK_TYPE_EXTENDED;
else
vol->target.type = VIR_STORAGE_VOL_DISK_TYPE_NONE;
vol->type = VIR_STORAGE_VOL_BLOCK;
/* The above gets allocation wrong for
* extended partitions, so overwrite it */
vol->allocation = vol->capacity =
(vol->source.extents[0].end - vol->source.extents[0].start);
if (STRNEQ(groups[2], "metadata"))
pool->def->allocation += vol->allocation;
if (vol->source.extents[0].end > pool->def->capacity)
pool->def->capacity = vol->source.extents[0].end;
return 0;
}
