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Blame SOURCES/kvm-iscsi-add-logical-block-provisioning-information-to-.patch.patch

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From 7f3514b0392635f132a8e1158d91536e5aed7783 Mon Sep 17 00:00:00 2001
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Message-Id: <7f3514b0392635f132a8e1158d91536e5aed7783.1389014116.git.minovotn@redhat.com>
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In-Reply-To: <c8cc35838d42aa286242772d97e3a9be7bb786ba.1389014116.git.minovotn@redhat.com>
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References: <c8cc35838d42aa286242772d97e3a9be7bb786ba.1389014116.git.minovotn@redhat.com>
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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Mon, 9 Dec 2013 14:08:51 +0100
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Subject: [PATCH 03/50] iscsi: add logical block provisioning information to
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 iscsilun
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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Message-id: <1386598178-11845-6-git-send-email-pbonzini@redhat.com>
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Patchwork-id: 56042
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O-Subject: [RHEL 7.0 qemu-kvm PATCH 05/52] iscsi: add logical block provisioning information to iscsilun
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Bugzilla: 1007815
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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From: Peter Lieven <pl@kamp.de>
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Signed-off-by: Peter Lieven <pl@kamp.de>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit f18a7cbb0992a02225d26afd336aaf47de75e11c)
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---
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 block/iscsi.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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 1 file changed, 77 insertions(+)
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Signed-off-by: Michal Novotny <minovotn@redhat.com>
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---
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 block/iscsi.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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 1 file changed, 77 insertions(+)
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diff --git a/block/iscsi.c b/block/iscsi.c
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index 8086957..6804b6d 100644
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--- a/block/iscsi.c
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+++ b/block/iscsi.c
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@@ -52,6 +52,10 @@ typedef struct IscsiLun {
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     uint64_t num_blocks;
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     int events;
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     QEMUTimer *nop_timer;
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+    uint8_t lbpme;
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+    uint8_t lbprz;
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+    struct scsi_inquiry_logical_block_provisioning lbp;
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+    struct scsi_inquiry_block_limits bl;
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 } IscsiLun;
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 typedef struct IscsiAIOCB {
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@@ -1005,6 +1009,8 @@ static int iscsi_readcapacity_sync(IscsiLun *iscsilun)
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                 } else {
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                     iscsilun->block_size = rc16->block_length;
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                     iscsilun->num_blocks = rc16->returned_lba + 1;
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+                    iscsilun->lbpme = rc16->lbpme;
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+                    iscsilun->lbprz = rc16->lbprz;
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                 }
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             }
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             break;
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@@ -1057,6 +1063,37 @@ static QemuOptsList runtime_opts = {
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     },
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 };
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+static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi,
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+                                          int lun, int evpd, int pc) {
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+        int full_size;
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+        struct scsi_task *task = NULL;
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+        task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64);
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+        if (task == NULL || task->status != SCSI_STATUS_GOOD) {
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+            goto fail;
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+        }
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+        full_size = scsi_datain_getfullsize(task);
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+        if (full_size > task->datain.size) {
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+            scsi_free_scsi_task(task);
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+
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+            /* we need more data for the full list */
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+            task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size);
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+            if (task == NULL || task->status != SCSI_STATUS_GOOD) {
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+                goto fail;
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+            }
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+        }
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+
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+        return task;
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+
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+fail:
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+        error_report("iSCSI: Inquiry command failed : %s",
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+                     iscsi_get_error(iscsi));
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+        if (task) {
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+            scsi_free_scsi_task(task);
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+            return NULL;
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+        }
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+        return NULL;
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+}
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+
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 /*
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  * We support iscsi url's on the form
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  * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
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@@ -1187,6 +1224,46 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
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         bs->sg = 1;
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     }
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+    if (iscsilun->lbpme) {
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+        struct scsi_inquiry_logical_block_provisioning *inq_lbp;
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+        task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
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+                                SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING);
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+        if (task == NULL) {
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+            ret = -EINVAL;
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+            goto out;
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+        }
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+        inq_lbp = scsi_datain_unmarshall(task);
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+        if (inq_lbp == NULL) {
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+            error_report("iSCSI: failed to unmarshall inquiry datain blob");
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+            ret = -EINVAL;
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+            goto out;
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+        }
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+        memcpy(&iscsilun->lbp, inq_lbp,
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+               sizeof(struct scsi_inquiry_logical_block_provisioning));
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+        scsi_free_scsi_task(task);
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+        task = NULL;
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+    }
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+
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+    if (iscsilun->lbp.lbpu || iscsilun->lbp.lbpws) {
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+        struct scsi_inquiry_block_limits *inq_bl;
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+        task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
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+                                SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS);
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+        if (task == NULL) {
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+            ret = -EINVAL;
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+            goto out;
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+        }
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+        inq_bl = scsi_datain_unmarshall(task);
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+        if (inq_bl == NULL) {
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+            error_report("iSCSI: failed to unmarshall inquiry datain blob");
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+            ret = -EINVAL;
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+            goto out;
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+        }
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+        memcpy(&iscsilun->bl, inq_bl,
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+               sizeof(struct scsi_inquiry_block_limits));
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+        scsi_free_scsi_task(task);
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+        task = NULL;
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+    }
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+
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 #if defined(LIBISCSI_FEATURE_NOP_COUNTER)
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     /* Set up a timer for sending out iSCSI NOPs */
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     iscsilun->nop_timer = qemu_new_timer_ms(rt_clock, iscsi_nop_timed_event, iscsilun);
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-- 
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1.7.11.7
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