diff options
| author | Nicholas Bellinger <nab@daterainc.com> | 2013-08-20 21:24:09 (GMT) |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-09-09 21:29:35 (GMT) |
| commit | 0123a9ec6a4fea20d5afea90c9b47fb73fb1bc34 (patch) | |
| tree | 6ac9f2539a9db0013757f51b18a97f3bf8ded49a /drivers/target/target_core_device.c | |
| parent | 76dde50ebef75773ea2b68e0bf914e87e6a3711c (diff) | |
| download | linux-0123a9ec6a4fea20d5afea90c9b47fb73fb1bc34.tar.xz | |
target: Add MAXIMUM COMPARE AND WRITE LENGTH in Block Limits VPD
This patch adds the MAXIMUM COMPARE AND WRITE LENGTH bit, currently
hardcoded to a single logical block (NoLB=1) within the Block Limits
VPD in spc_emulate_evpd_b0().
Also add emulate_caw device attribute in configfs (enabled by default)
to allow the exposure of this bit to be disabled, if necessary.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
Diffstat (limited to 'drivers/target/target_core_device.c')
| -rw-r--r-- | drivers/target/target_core_device.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 8f4142f..0b5f868 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -890,6 +890,19 @@ int se_dev_set_emulate_tpws(struct se_device *dev, int flag) return 0; } +int se_dev_set_emulate_caw(struct se_device *dev, int flag) +{ + if (flag != 0 && flag != 1) { + pr_err("Illegal value %d\n", flag); + return -EINVAL; + } + dev->dev_attrib.emulate_caw = flag; + pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", + dev, flag); + + return 0; +} + int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) { if ((flag != 0) && (flag != 1)) { @@ -1423,6 +1436,7 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; + dev->dev_attrib.emulate_caw = DA_EMULATE_CAW; dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; dev->dev_attrib.is_nonrot = DA_IS_NONROT; dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; |