Patchwork [PATCHv4,10/17] iscsi: set limits in BlockDriverState

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Submitter Peter Lieven
Date Oct. 8, 2013, 11:58 a.m.
Message ID <1381233491-17019-11-git-send-email-pl@kamp.de>
Download mbox | patch
Permalink /patch/281462/
State New
Headers show

Comments

Peter Lieven - Oct. 8, 2013, 11:58 a.m.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Peter Lieven <pl@kamp.de>
---
 block/iscsi.c |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

Patch

diff --git a/block/iscsi.c b/block/iscsi.c
index be70ced..8ed2274 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1367,6 +1367,20 @@  static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
                sizeof(struct scsi_inquiry_block_limits));
         scsi_free_scsi_task(task);
         task = NULL;
+
+        if (iscsilun->bl.max_unmap < 0xffffffff) {
+            bs->bl.max_discard = sector_lun2qemu(iscsilun->bl.max_unmap,
+                                                 iscsilun);
+        }
+        bs->bl.discard_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran,
+                                                   iscsilun);
+
+        if (iscsilun->bl.max_ws_len < 0xffffffff) {
+            bs->bl.max_write_zeroes = sector_lun2qemu(iscsilun->bl.max_ws_len,
+                                                      iscsilun);
+        }
+        bs->bl.write_zeroes_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran,
+                                                        iscsilun);
     }
 
 #if defined(LIBISCSI_FEATURE_NOP_COUNTER)