target_core_alua: Store supported ALUA states

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Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=c0dc941e2bdfad4deccf3ba2626f485b5a5f59a4
Commit:     c0dc941e2bdfad4deccf3ba2626f485b5a5f59a4
Parent:     73f3bf51e0b296acc58f895639be743739347da1
Author:     Hannes Reinecke <hare at suse.de>
AuthorDate: Tue Nov 19 09:07:49 2013 +0100
Committer:  Nicholas Bellinger <nab at linux-iscsi.org>
CommitDate: Wed Nov 20 11:26:37 2013 -0800

    target_core_alua: Store supported ALUA states
    
    The supported ALUA states might be different for individual
    devices, so store it in a separate field.
    
    (nab: Remove unnecessary line continuation)
    
    Signed-off-by: Hannes Reinecke <hare at suse.de>
    Signed-off-by: Nicholas Bellinger <nab at linux-iscsi.org>
---
 drivers/target/target_core_alua.c | 14 ++++++++------
 drivers/target/target_core_alua.h | 11 +++++++++++
 include/target/target_core_base.h |  1 +
 3 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c
index 08e41e3..fdcee32 100644
--- a/drivers/target/target_core_alua.c
+++ b/drivers/target/target_core_alua.c
@@ -117,12 +117,7 @@ target_emulate_report_target_port_groups(struct se_cmd *cmd)
 		/*
 		 * Set supported ASYMMETRIC ACCESS State bits
 		 */
-		buf[off] = 0x80; /* T_SUP */
-		buf[off] |= 0x40; /* O_SUP */
-		buf[off] |= 0x8; /* U_SUP */
-		buf[off] |= 0x4; /* S_SUP */
-		buf[off] |= 0x2; /* AN_SUP */
-		buf[off++] |= 0x1; /* AO_SUP */
+		buf[off++] |= tg_pt_gp->tg_pt_gp_alua_supported_states;
 		/*
 		 * TARGET PORT GROUP
 		 */
@@ -1367,6 +1362,13 @@ struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev,
 	tg_pt_gp->tg_pt_gp_trans_delay_msecs = ALUA_DEFAULT_TRANS_DELAY_MSECS;
 	tg_pt_gp->tg_pt_gp_implicit_trans_secs = ALUA_DEFAULT_IMPLICIT_TRANS_SECS;
 
+	/*
+	 * Enable all supported states
+	 */
+	tg_pt_gp->tg_pt_gp_alua_supported_states =
+	    ALUA_T_SUP | ALUA_O_SUP |
+	    ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP;
+
 	if (def_group) {
 		spin_lock(&dev->t10_alua.tg_pt_gps_lock);
 		tg_pt_gp->tg_pt_gp_id =
diff --git a/drivers/target/target_core_alua.h b/drivers/target/target_core_alua.h
index d6db78b..88e2e83 100644
--- a/drivers/target/target_core_alua.h
+++ b/drivers/target/target_core_alua.h
@@ -23,6 +23,17 @@
 #define ALUA_ACCESS_STATE_TRANSITION		0xf
 
 /*
+ * from spc4r36j section 6.37 Table 306
+ */
+#define ALUA_T_SUP		0x80
+#define ALUA_O_SUP		0x40
+#define ALUA_LBD_SUP		0x10
+#define ALUA_U_SUP		0x08
+#define ALUA_S_SUP		0x04
+#define ALUA_AN_SUP		0x02
+#define ALUA_AO_SUP		0x01
+
+/*
  * REPORT_TARGET_PORT_GROUP STATUS CODE
  *
  * from spc4r17 section 6.27 Table 246
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 3b0b64a..45412a6 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -283,6 +283,7 @@ struct t10_alua_lu_gp_member {
 struct t10_alua_tg_pt_gp {
 	u16	tg_pt_gp_id;
 	int	tg_pt_gp_valid_id;
+	int	tg_pt_gp_alua_supported_states;
 	int	tg_pt_gp_alua_access_status;
 	int	tg_pt_gp_alua_access_type;
 	int	tg_pt_gp_nonop_delay_msecs;