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authorRoland Dreier <roland@purestorage.com>2011-07-05 13:34:52 -0700
committerNicholas Bellinger <nab@linux-iscsi.org>2011-07-22 09:37:47 +0000
commite22a7f075226c51f3f71b922e9eeb4f99fac1475 (patch)
treee0a04f974153136eafe13793ee59be58c37c5ffc /include/target
parentb2eb705e00a9b9a9b3122192a7ab3e9058f0c48a (diff)
downloadop-kernel-dev-e22a7f075226c51f3f71b922e9eeb4f99fac1475.zip
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target: Implement Block Device Characteristics VPD page
Implement page B1h, Block Device Characteristics, so that we can report a medium rotation rate of 1 (non-rotating / solid state) if the is_nonrot device attribute is set; we update the iblock backend to set this attribute if the underlying Linux block device has its nonrot flag set. Signed-off-by: Roland Dreier <roland@purestorage.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/target')
-rw-r--r--include/target/target_core_base.h1
-rw-r--r--include/target/target_core_device.h1
-rw-r--r--include/target/target_core_transport.h2
3 files changed, 4 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index cd163dd..81deb39 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -661,6 +661,7 @@ struct se_dev_attrib {
int emulate_reservations;
int emulate_alua;
int enforce_pr_isids;
+ int is_nonrot;
u32 hw_block_size;
u32 block_size;
u32 hw_max_sectors;
diff --git a/include/target/target_core_device.h b/include/target/target_core_device.h
index 96586cc..f3b6ae6 100644
--- a/include/target/target_core_device.h
+++ b/include/target/target_core_device.h
@@ -39,6 +39,7 @@ extern int se_dev_set_emulate_tas(struct se_device *, int);
extern int se_dev_set_emulate_tpu(struct se_device *, int);
extern int se_dev_set_emulate_tpws(struct se_device *, int);
extern int se_dev_set_enforce_pr_isids(struct se_device *, int);
+extern int se_dev_set_is_nonrot(struct se_device *, int);
extern int se_dev_set_queue_depth(struct se_device *, u32);
extern int se_dev_set_max_sectors(struct se_device *, u32);
extern int se_dev_set_optimal_sectors(struct se_device *, u32);
diff --git a/include/target/target_core_transport.h b/include/target/target_core_transport.h
index 2aae764..b27ce1a 100644
--- a/include/target/target_core_transport.h
+++ b/include/target/target_core_transport.h
@@ -101,6 +101,8 @@
#define DA_ENFORCE_PR_ISIDS 1
#define DA_STATUS_MAX_SECTORS_MIN 16
#define DA_STATUS_MAX_SECTORS_MAX 8192
+/* By default don't report non-rotating (solid state) medium */
+#define DA_IS_NONROT 0
#define SE_MODE_PAGE_BUF 512
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