diff options
| author | Nicholas Bellinger <nab@daterainc.com> | 2013-08-20 14:24:09 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-09-09 14:29:35 -0700 |
| commit | 0123a9ec6a4fea20d5afea90c9b47fb73fb1bc34 (patch) | |
| tree | 6ac9f2539a9db0013757f51b18a97f3bf8ded49a /drivers/target/target_core_spc.c | |
| parent | 76dde50ebef75773ea2b68e0bf914e87e6a3711c (diff) | |
| download | linux-0123a9ec6a4fea20d5afea90c9b47fb73fb1bc34.tar.gz | |
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_spc.c')
| -rw-r--r-- | drivers/target/target_core_spc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 4cb667d720a7..ed7077a67d7b 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -457,6 +457,11 @@ spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) /* Set WSNZ to 1 */ buf[4] = 0x01; + /* + * Set MAXIMUM COMPARE AND WRITE LENGTH + */ + if (dev->dev_attrib.emulate_caw) + buf[5] = 0x01; /* * Set OPTIMAL TRANSFER LENGTH GRANULARITY |