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authorNicholas Bellinger <nab@linux-iscsi.org>2012-05-16 22:02:34 -0700
committerNicholas Bellinger <nab@linux-iscsi.org>2012-05-17 00:45:58 -0700
commit5b9a4d7280e160982a8ea37bc03619f53b5c98b7 (patch)
tree3d7fbce10e7379097f34276b6a8a7d090d4dc813 /include
parentba539743b70cd160c84bab1c82910d0789b820f8 (diff)
downloadlinux-5b9a4d7280e160982a8ea37bc03619f53b5c98b7.tar.gz
target: Add MI_REPORT_TARGET_PGS ext. header + implict_trans_secs attribute
This patch adds support for ALUA MI_REPORT_TARGET_PGS extended header format defined within SPC-4. It changes target core ALUA emulation logic within target_emulate_report_target_port_groups() to support both the extended and original length only header formats. It includes adding a new 'implict_trans_secs' attribute for each ALUA target port group to control the value returned to the application client for an recommended implict translation timeout in seconds. By default this value is currently set to zero, and limited up to 255 by virtue of using a single byte in the extended header format. This value is used by target_emulate_report_target_port_groups() within the extended header logic to set IMPLICIT TRANSITION TIME as defined by spc4r30. Cc: Hannes Reinecke <hare@suse.de> Cc: Rob Evers <revers@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include')
-rw-r--r--include/target/target_core_base.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 1fe9111f4dc..dc35d8660aa 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -330,6 +330,7 @@ struct t10_alua_tg_pt_gp {
int tg_pt_gp_alua_access_type;
int tg_pt_gp_nonop_delay_msecs;
int tg_pt_gp_trans_delay_msecs;
+ int tg_pt_gp_implict_trans_secs;
int tg_pt_gp_pref;
int tg_pt_gp_write_metadata;
/* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */