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| author | Roland Dreier <roland@purestorage.com> | 2011-07-05 13:34:52 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-07-22 09:37:47 +0000 |
| commit | e22a7f075226c51f3f71b922e9eeb4f99fac1475 (patch) | |
| tree | e0a04f974153136eafe13793ee59be58c37c5ffc /drivers/target/target_core_device.c | |
| parent | b2eb705e00a9b9a9b3122192a7ab3e9058f0c48a (diff) | |
| download | linux-e22a7f075226c51f3f71b922e9eeb4f99fac1475.tar.gz linux-e22a7f075226c51f3f71b922e9eeb4f99fac1475.tar.bz2 linux-e22a7f075226c51f3f71b922e9eeb4f99fac1475.zip | |
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 'drivers/target/target_core_device.c')
| -rw-r--r-- | drivers/target/target_core_device.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index f13e2941936c..440e6b69d47b 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -853,6 +853,7 @@ void se_dev_set_default_attribs( dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS; dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA; dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; + dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT; /* * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK * iblock_create_virtdevice() from struct queue_limits values @@ -1117,6 +1118,18 @@ int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) return 0; } +int se_dev_set_is_nonrot(struct se_device *dev, int flag) +{ + if ((flag != 0) && (flag != 1)) { + printk(KERN_ERR "Illegal value %d\n", flag); + return -EINVAL; + } + dev->se_sub_dev->se_dev_attrib.is_nonrot = flag; + printk(KERN_INFO "dev[%p]: SE Device is_nonrot bit: %d\n", + dev, flag); + return 0; +} + /* * Note, this can only be called on unexported SE Device Object. */ |