[libvirt] [PATCH] storage: add wipeVol to iscsi-direct storage backend
clem at lse.epita.fr
clem at lse.epita.fr
Fri Aug 10 11:12:52 UTC 2018
From: Clementine Hayat <clem at lse.epita.fr>
Change set volume capacity to get volume capacity to avoid code
duplicate.
Signed-off-by: Clementine Hayat <clem at lse.epita.fr>
---
Set BLOCK_PER_PACKET to 128. Not sure about this value. Should be
potentially tuned.
src/storage/storage_backend_iscsi_direct.c | 152 +++++++++++++++++++--
1 file changed, 143 insertions(+), 9 deletions(-)
diff --git a/src/storage/storage_backend_iscsi_direct.c b/src/storage/storage_backend_iscsi_direct.c
index 0764356b62..094425c101 100644
--- a/src/storage/storage_backend_iscsi_direct.c
+++ b/src/storage/storage_backend_iscsi_direct.c
@@ -41,6 +41,7 @@
#define ISCSI_DEFAULT_TARGET_PORT 3260
#define VIR_ISCSI_TEST_UNIT_TIMEOUT 30 * 1000
+#define BLOCK_PER_PACKET 128
VIR_LOG_INIT("storage.storage_backend_iscsi_direct");
@@ -237,13 +238,13 @@ virISCSIDirectSetVolumeAttributes(virStoragePoolObjPtr pool,
}
static int
-virISCSIDirectSetVolumeCapacity(struct iscsi_context *iscsi,
- virStorageVolDefPtr vol,
- int lun)
+virISCSIDirectGetVolumeCapacity(struct iscsi_context *iscsi,
+ int lun,
+ uint32_t *block_size,
+ uint32_t *nb_block)
{
struct scsi_task *task = NULL;
struct scsi_inquiry_standard *inq = NULL;
- long long size = 0;
int ret = -1;
if (!(task = iscsi_inquiry_sync(iscsi, lun, 0, 0, 64)) ||
@@ -282,10 +283,8 @@ virISCSIDirectSetVolumeCapacity(struct iscsi_context *iscsi,
goto cleanup;
}
- size = rc10->block_size;
- size *= rc10->lba;
- vol->target.capacity = size;
- vol->target.allocation = size;
+ *block_size = rc10->block_size;
+ *nb_block = rc10->lba;
}
@@ -303,6 +302,8 @@ virISCSIDirectRefreshVol(virStoragePoolObjPtr pool,
{
virStoragePoolDefPtr def = virStoragePoolObjGetDef(pool);
virStorageVolDefPtr vol = NULL;
+ uint32_t block_size;
+ uint32_t nb_block;
int ret = -1;
virStoragePoolObjClearVols(pool);
@@ -314,9 +315,12 @@ virISCSIDirectRefreshVol(virStoragePoolObjPtr pool,
vol->type = VIR_STORAGE_VOL_NETWORK;
- if (virISCSIDirectSetVolumeCapacity(iscsi, vol, lun) < 0)
+ if (virISCSIDirectGetVolumeCapacity(iscsi, lun,
+ &block_size, &nb_block) < 0)
goto cleanup;
+ vol->target.capacity = block_size * nb_block;
+ vol->target.allocation = block_size * nb_block;
def->capacity += vol->target.capacity;
def->allocation += vol->target.allocation;
@@ -584,12 +588,142 @@ virStorageBackendISCSIDirectRefreshPool(virStoragePoolObjPtr pool)
return ret;
}
+static int
+virStorageBackendISCSIDirectGetLun(virStorageVolDefPtr vol,
+ int *lun)
+{
+ char *name = NULL;
+ char **name_split = NULL;
+ int ret = -1;
+
+ if (VIR_STRDUP(name, vol->name) < 0)
+ return -1;
+ if (!(name_split = virStringSplit(name, ":", 4)))
+ goto cleanup;
+ if (!name_split[3])
+ goto cleanup;
+ if (virStrToLong_i(name_split[3], NULL, 10, lun) < 0)
+ goto cleanup;
+
+ ret = 0;
+ cleanup:
+ VIR_FREE(name);
+ virStringListFree(name_split);
+ printf("\n");
+ return ret;
+}
+
+static int
+virStorageBackendISCSIDirectVolWipeZero(virStorageVolDefPtr vol,
+ struct iscsi_context *iscsi)
+{
+ uint32_t lba = 0;
+ uint32_t block_size;
+ uint32_t nb_block;
+ struct scsi_task *task = NULL;
+ int lun = 0;
+ int ret = -1;
+ unsigned char *data;
+
+ if (virStorageBackendISCSIDirectGetLun(vol, &lun) < 0)
+ return ret;
+ if (virISCSIDirectTestUnitReady(iscsi, lun) < 0)
+ return ret;
+ if (virISCSIDirectGetVolumeCapacity(iscsi, lun, &block_size, &nb_block))
+ return ret;
+ if (VIR_ALLOC_N(data, block_size * BLOCK_PER_PACKET))
+ return ret;
+
+ while (lba < nb_block) {
+ if (nb_block - lba > block_size * BLOCK_PER_PACKET) {
+ if (!(task = iscsi_write10_sync(iscsi, lun, lba, data,
+ block_size * BLOCK_PER_PACKET,
+ block_size, 0, 0, 0, 0, 0)))
+ goto cleanup;
+ scsi_free_scsi_task(task);
+ lba += BLOCK_PER_PACKET;
+ }
+ else {
+ if (!(task = iscsi_write10_sync(iscsi, lun, lba, data, block_size,
+ block_size, 0, 0, 0, 0, 0)))
+ goto cleanup;
+ scsi_free_scsi_task(task);
+ lba++;
+ }
+ }
+
+ ret = 0;
+ cleanup:
+ VIR_FREE(data);
+ return ret;
+}
+
+static int
+virStorageBackenISCSIDirectWipeVol(virStoragePoolObjPtr pool,
+ virStorageVolDefPtr vol,
+ unsigned int algorithm,
+ unsigned int flags)
+{
+ virStoragePoolDefPtr def = virStoragePoolObjGetDef(pool);
+ struct iscsi_context *iscsi = NULL;
+ char *portal = NULL;
+ int ret = -1;
+
+ virCheckFlags(0, -1);
+
+ if (!(iscsi = virISCSIDirectCreateContext(def->source.initiator.iqn)))
+ goto cleanup;
+ if (!(portal = virStorageBackendISCSIDirectPortal(&def->source)))
+ goto cleanup;
+ if (virStorageBackendISCSIDirectSetAuth(iscsi, &def->source) < 0)
+ goto cleanup;
+ if (virISCSIDirectSetContext(iscsi, def->source.devices[0].path, ISCSI_SESSION_NORMAL) < 0)
+ goto cleanup;
+ if (virISCSIDirectConnect(iscsi, portal) < 0)
+ goto cleanup;
+
+
+ switch ((virStorageVolWipeAlgorithm) algorithm) {
+ case VIR_STORAGE_VOL_WIPE_ALG_ZERO:
+ if (virStorageBackendISCSIDirectVolWipeZero(vol, iscsi) < 0) {
+ virReportSystemError(VIR_ERR_INTERNAL_ERROR,
+ _("failed to wipe volume %s"),
+ vol->name);
+ goto disconnect;
+ }
+ break;
+ case VIR_STORAGE_VOL_WIPE_ALG_TRIM:
+ case VIR_STORAGE_VOL_WIPE_ALG_NNSA:
+ case VIR_STORAGE_VOL_WIPE_ALG_DOD:
+ case VIR_STORAGE_VOL_WIPE_ALG_BSI:
+ case VIR_STORAGE_VOL_WIPE_ALG_GUTMANN:
+ case VIR_STORAGE_VOL_WIPE_ALG_SCHNEIER:
+ case VIR_STORAGE_VOL_WIPE_ALG_PFITZNER7:
+ case VIR_STORAGE_VOL_WIPE_ALG_PFITZNER33:
+ case VIR_STORAGE_VOL_WIPE_ALG_RANDOM:
+ case VIR_STORAGE_VOL_WIPE_ALG_LAST:
+ virReportError(VIR_ERR_INVALID_ARG, _("unsupported algorithm %d"),
+ algorithm);
+ goto disconnect;
+ }
+
+ ret = 0;
+ disconnect:
+ virISCSIDirectDisconnect(iscsi);
+ cleanup:
+ VIR_FREE(portal);
+ iscsi_destroy_context(iscsi);
+ return ret;
+}
+
+
virStorageBackend virStorageBackendISCSIDirect = {
.type = VIR_STORAGE_POOL_ISCSI_DIRECT,
.checkPool = virStorageBackendISCSIDirectCheckPool,
.findPoolSources = virStorageBackendISCSIDirectFindPoolSources,
.refreshPool = virStorageBackendISCSIDirectRefreshPool,
+ .wipeVol = virStorageBackenISCSIDirectWipeVol,
};
int
--
2.18.0
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