Patchwork [2/4] ISCSI: Use READCAPACITY10 for MMC devices

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Submitter ronniesahlberg@gmail.com
Date May 26, 2012, 4:56 a.m.
Message ID <1338008201-29078-3-git-send-email-ronniesahlberg@gmail.com>
Download mbox | patch
Permalink /patch/161447/
State New
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ronniesahlberg@gmail.com - May 26, 2012, 4:56 a.m.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
---
 block/iscsi.c |   47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 47 insertions(+), 0 deletions(-)

Patch

diff --git a/block/iscsi.c b/block/iscsi.c
index 39d75cb..2ddb9e5 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -700,6 +700,42 @@  iscsi_readcapacity16_cb(struct iscsi_context *iscsi, int status,
 }
 
 static void
+iscsi_readcapacity10_cb(struct iscsi_context *iscsi, int status,
+                        void *command_data, void *opaque)
+{
+    struct IscsiTask *itask = opaque;
+    struct scsi_readcapacity10 *rc10;
+    struct scsi_task *task = command_data;
+
+    if (status != 0) {
+        error_report("iSCSI: Failed to read capacity of iSCSI lun. %s",
+                     iscsi_get_error(iscsi));
+        itask->status   = 1;
+        itask->complete = 1;
+        scsi_free_scsi_task(task);
+        return;
+    }
+
+    rc10 = scsi_datain_unmarshall(task);
+    if (rc10 == NULL) {
+        error_report("iSCSI: Failed to unmarshall readcapacity10 data.");
+        itask->status   = 1;
+        itask->complete = 1;
+        scsi_free_scsi_task(task);
+        return;
+    }
+
+    itask->iscsilun->block_size = rc10->block_size;
+    itask->iscsilun->num_blocks = rc10->lba + 1;
+    itask->bs->total_sectors    = itask->iscsilun->num_blocks *
+                               itask->iscsilun->block_size / BDRV_SECTOR_SIZE ;
+
+    itask->status   = 0;
+    itask->complete = 1;
+    scsi_free_scsi_task(task);
+}
+
+static void
 iscsi_inquiry_cb(struct iscsi_context *iscsi, int status, void *command_data,
                  void *opaque)
 {
@@ -738,6 +774,17 @@  iscsi_inquiry_cb(struct iscsi_context *iscsi, int status, void *command_data,
             return;
         }
         break;
+    case TYPE_ROM:
+        task = iscsi_readcapacity10_task(iscsi, itask->iscsilun->lun,
+                                   0, 0,
+                                   iscsi_readcapacity10_cb, opaque);
+        if (task == NULL) {
+            error_report("iSCSI: failed to send readcapacity16 command.");
+            itask->status   = 1;
+            itask->complete = 1;
+            return;
+        }
+        break;
     default:
         itask->status   = 0;
         itask->complete = 1;