Re: [libvirt] [PATCH v2] storage: add wipeVol to iscsi-direct storage backend

From: Clementine Hayat <clem(a)lse.epita.fr&gt; Change set volume capacity to get volume capacity and put the connection and helpers in one function to avoid code duplicates. Signed-off-by: Clementine Hayat <clem(a)lse.epita.fr&gt; --- Set BLOCK_PER_PACKET to 128. Not sure about this value. Should be potentially tuned. src/storage/storage_backend_iscsi_direct.c | 173 ++++++++++++++++++--- 1 file changed, 152 insertions(+), 21 deletions(-)

diff --git a/src/storage/storage_backend_iscsi_direct.c b/src/storage/storage_backend_iscsi_direct.c index 0764356b62..958f5937f9 100644 --- a/src/storage/storage_backend_iscsi_direct.c +++ b/src/storage/storage_backend_iscsi_direct.c @@ -41,6 +41,8 @@ #define ISCSI_DEFAULT_TARGET_PORT 3260 #define VIR_ISCSI_TEST_UNIT_TIMEOUT 30 * 1000 +#define BLOCK_PER_PACKET 128 +#define VOL_NAME_PREFIX "unit:0:0:" VIR_LOG_INIT("storage.storage_backend_iscsi_direct"); @@ -225,7 +227,7 @@ virISCSIDirectSetVolumeAttributes(virStoragePoolObjPtr pool, { virStoragePoolDefPtr def = virStoragePoolObjGetDef(pool); - if (virAsprintf(&vol->name, "unit:0:0:%u", lun) < 0) + if (virAsprintf(&vol->name, "%s%u", VOL_NAME_PREFIX, lun) < 0) return -1; if (virAsprintf(&vol->key, "ip-%s-iscsi-%s-lun-%u", portal, def->source.devices[0].path, lun) < 0) @@ -237,13 +239,13 @@ 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 +284,8 @@ 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 +303,8 @@ 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 +316,12 @@ 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; @@ -553,24 +558,33 @@ virStorageBackendISCSIDirectFindPoolSources(const char *srcSpec, virStoragePoolSourceFree(source); return ret; } +static int +virStorageBackendISCSIDirectSetConnection(virStoragePoolObjPtr pool, + struct iscsi_context **iscsi, + char **portal) +{ + virStoragePoolDefPtr def = virStoragePoolObjGetDef(pool); + + if (!(*iscsi = virISCSIDirectCreateContext(def->source.initiator.iqn))) + return -1; + if (!(*portal = virStorageBackendISCSIDirectPortal(&def->source))) + return -1; + if (virStorageBackendISCSIDirectSetAuth(*iscsi, &def->source) < 0) + return -1; + if (virISCSIDirectSetContext(*iscsi, def->source.devices[0].path, ISCSI_SESSION_NORMAL) < 0) + return -1; + if (virISCSIDirectConnect(*iscsi, *portal) < 0) + return -1; + return 0;