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iscsi: add logical block provisioning information to iscsilun

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Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Lieven 2013-07-19 09:19:39 +02:00 committed by Paolo Bonzini
parent 57ffcc4c83
commit f18a7cbb09
1 changed files with 77 additions and 0 deletions
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77
block/iscsi.c
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@ -52,6 +52,10 @@ typedef struct IscsiLun {
uint64_t num_blocks;
int events;
QEMUTimer *nop_timer;
uint8_t lbpme;
uint8_t lbprz;
struct scsi_inquiry_logical_block_provisioning lbp;
struct scsi_inquiry_block_limits bl;
} IscsiLun;
typedef struct IscsiAIOCB {
@ -999,6 +1003,8 @@ static int iscsi_readcapacity_sync(IscsiLun *iscsilun)
} else {
iscsilun->block_size = rc16->block_length;
iscsilun->num_blocks = rc16->returned_lba + 1;
iscsilun->lbpme = rc16->lbpme;
iscsilun->lbprz = rc16->lbprz;
}
}
break;
@ -1051,6 +1057,37 @@ static QemuOptsList runtime_opts = {
},
};
static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi,
int lun, int evpd, int pc) {
int full_size;
struct scsi_task *task = NULL;
task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64);
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
goto fail;
}
full_size = scsi_datain_getfullsize(task);
if (full_size > task->datain.size) {
scsi_free_scsi_task(task);
/* we need more data for the full list */
task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size);
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
goto fail;
}
}
return task;
fail:
error_report("iSCSI: Inquiry command failed : %s",
iscsi_get_error(iscsi));
if (task) {
scsi_free_scsi_task(task);
return NULL;
}
return NULL;
}
/*
* We support iscsi url's on the form
* iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
@ -1180,6 +1217,46 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags)
bs->sg = 1;
}
if (iscsilun->lbpme) {
struct scsi_inquiry_logical_block_provisioning *inq_lbp;
task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING);
if (task == NULL) {
ret = -EINVAL;
goto out;
}
inq_lbp = scsi_datain_unmarshall(task);
if (inq_lbp == NULL) {
error_report("iSCSI: failed to unmarshall inquiry datain blob");
ret = -EINVAL;
goto out;
}
memcpy(&iscsilun->lbp, inq_lbp,
sizeof(struct scsi_inquiry_logical_block_provisioning));
scsi_free_scsi_task(task);
task = NULL;
}
if (iscsilun->lbp.lbpu || iscsilun->lbp.lbpws) {
struct scsi_inquiry_block_limits *inq_bl;
task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS);
if (task == NULL) {
ret = -EINVAL;
goto out;
}
inq_bl = scsi_datain_unmarshall(task);
if (inq_bl == NULL) {
error_report("iSCSI: failed to unmarshall inquiry datain blob");
ret = -EINVAL;
goto out;
}
memcpy(&iscsilun->bl, inq_bl,
sizeof(struct scsi_inquiry_block_limits));
scsi_free_scsi_task(task);
task = NULL;
}
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
/* Set up a timer for sending out iSCSI NOPs */
iscsilun->nop_timer = timer_new_ms(QEMU_CLOCK_REALTIME, iscsi_nop_timed_event, iscsilun);