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authorDmitry Bogdanov <d.bogdanov@yadro.com>2022-09-12 15:54:57 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2022-09-16 04:40:58 +0300
commit5bdd4a8e5cb96236a2aa9ad38df73381b4161404 (patch)
tree018ed9d739e88393e06abd65965a37a6c8e78a68
parentefca52749564601de2045eb71dbe756b7bade4e8 (diff)
downloadlinux-5bdd4a8e5cb96236a2aa9ad38df73381b4161404.tar.xz
scsi: target: core: Set MULTIP bit for se_device with multiple ports
SAM-5 4.8.3 (SCSI target device with multiple SCSI ports structure) obligates to set MULTIP bit when there's multiple SCSI target ports: Each device server shall indicate the presence of multiple SCSI target ports by setting the MULTIP bit to one in its standard INQUIRY data (see SPC-4). Set MULTIP bit automatically to indicate the presence of multiple SCSI target ports within standard inquiry response data if there are multiple target ports in all target port groups of the se_device. Link: https://lore.kernel.org/r/20220912125457.22573-2-d.bogdanov@yadro.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Co-developed-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-rw-r--r--drivers/target/target_core_spc.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index c14441c89bed..7cca3b15472b 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -115,6 +115,12 @@ spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
buf[5] |= 0x1;
}
+ /*
+ * Set MULTIP bit to indicate presence of multiple SCSI target ports
+ */
+ if (dev->export_count > 1)
+ buf[6] |= 0x10;
+
buf[7] = 0x2; /* CmdQue=1 */
/*