linux/drivers/target/target_core_alua.h, branch v3.17-rc3

target_core_alua: Referrals configfs integration

2014-01-10T05:48:35Z

Referrals need an LBA map, which needs to be kept consistent across all target port groups. So instead of tying the map to the target port groups I've implemented a single attribute containing the entire map. Signed-off-by: Hannes Reinecke Signed-off-by: Nicholas Bellinger

target_core_alua: Referrals infrastructure

2014-01-10T05:48:17Z

Add infrastructure for referrals. v2 changes: - Fix unsigned long long division in core_alua_state_lba_dependent on 32-bit (Fengguang + Chen + Hannes) - Fix compile warning in core_alua_state_lba_dependent (nab) - Convert segment_* + sectors variables in core_alua_state_lba_dependent to u64 (Hannes) Signed-off-by: Hannes Reinecke Signed-off-by: Nicholas Bellinger

target_core_alua: Allocate ALUA metadata on demand

2013-12-17T18:33:58Z

We should only allocate ALUA metadata if we're actually going to write them. Signed-off-by: Hannes Reinecke Signed-off-by: Nicholas Bellinger

target_core_alua: Store supported ALUA states

2013-11-20T19:26:37Z

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 Signed-off-by: Nicholas Bellinger

target_core_alua: Rename ALUA_ACCESS_STATE_OPTIMIZED

2013-11-20T19:24:57Z

Rename ALUA_ACCESS_STATE_OPTMIZED to ALUA_ACCESS_STATE_OPTIMIZED. Signed-off-by: Hannes Reinecke Signed-off-by: Nicholas Bellinger

target core: rename (ex,im)plict -> (ex,im)plicit

2013-11-20T19:24:40Z

Signed-off-by: Hannes Reinecke Signed-off-by: Nicholas Bellinger

target: pass sense_reason as a return value

2012-11-07T04:55:46Z

Pass the sense reason as an explicit return value from the I/O submission path instead of storing it in struct se_cmd and using negative return values. This cleans up a lot of the code pathes, and with the sparse annotations for the new sense_reason_t type allows for much better error checking. (nab: Convert spc_emulate_modesense + spc_emulate_modeselect to use sense_reason_t with Roland's MODE SELECT changes) Signed-off-by: Christoph Hellwig Cc: Roland Dreier Signed-off-by: Nicholas Bellinger

target: simplify alua support

2012-11-07T04:55:45Z

We always support ALUA for virtual backends, and never for physical ones. Simplify the code to just deal with these two cases and remove the superflous abstractions. Signed-off-by: Christoph Hellwig Signed-off-by: Nicholas Bellinger

target: kill struct se_subsystem_dev

2012-11-07T04:55:43Z

Simplify the code a lot by killing the superflous struct se_subsystem_dev. Instead se_device is allocated early on by the backend driver, which allocates it as part of its own per-device structure, borrowing the scheme that is for example used for inode allocation. Signed-off-by: Christoph Hellwig Signed-off-by: Nicholas Bellinger

target: Add MI_REPORT_TARGET_PGS ext. header + implict_trans_secs attribute

2012-05-17T07:45:58Z

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 Cc: Rob Evers Cc: Christoph Hellwig Cc: Roland Dreier Signed-off-by: Nicholas Bellinger