linux-toradex.git/drivers/target/target_core_device.c, branch v3.11.2

target: Make virtual_lun0 a nullio device

2013-06-14T07:27:32+00:00

Nobody should be expecting to read or write virtual_lun0.

Signed-off-by: Andy Grover 
Signed-off-by: Nicholas Bellinger

target: Remove t10_reservation.pr_aptpl_buf_len

2013-06-14T07:04:46+00:00

It's only ever set to PR_APTPL_BUF_LEN, so we don't need a variable.

Signed-off-by: Andy Grover 
Signed-off-by: Nicholas Bellinger

target: Remove unused struct members in se_dev_entry

2013-05-03T23:42:18+00:00

Some were incremented, but never used anywhere from what I could tell.

Signed-off-by: Andy Grover 
Signed-off-by: Nicholas Bellinger

target: Fix lookup of dynamic NodeACLs during cached demo-mode operation

2013-02-19T02:47:20+00:00

This patch fixes a bug in core_tpg_check_initiator_node_acl() ->
core_tpg_get_initiator_node_acl() where a dynamically created
se_node_acl generated during session login would be skipped during
subsequent lookup due to the '!acl->dynamic_node_acl' check, causing
a new se_node_acl to be created with a duplicate ->initiatorname.

This would occur when a fabric endpoint was configured with
TFO->tpg_check_demo_mode()=1 + TPF->tpg_check_demo_mode_cache()=1
preventing the release of an existing se_node_acl during se_session
shutdown.

Also, drop the unnecessary usage of core_tpg_get_initiator_node_acl()
within core_dev_init_initiator_node_lun_acl() that originally
required the extra '!acl->dynamic_node_acl' check, and just pass
the configfs provided se_node_acl pointer instead.

Cc: 
Signed-off-by: Nicholas Bellinger

target: Add device attribute to expose config_item_name for INQUIRY model

2013-02-13T19:27:58+00:00

This patch changes LIO to use the configfs backend device name as the
model if you echo '1' to an individual device's emulate_model_alias attribute.
This is a valid operation only on devices with an export count of 0.

Signed-off-by: Tregaron Bayly 
Signed-off-by: Nicholas Bellinger

target/iblock: Use backend REQ_FLUSH hint for WriteCacheEnabled status

2013-02-13T19:27:51+00:00

This patch allows IBLOCK to check block hints in request_queue->flush_flags
when reporting current backend device WriteCacheEnabled status to a remote
SCSI initiator port.

This is done via a se_subsystem_api->get_write_cache() call instead of a
backend se_device creation time flag, as we expect REQ_FLUSH bits to possibly
change from an underlying blk_queue_flush() by the SCSI disk driver, or
internal raw struct block_device driver usage.

Also go ahead and update iblock_execute_rw() bio I/O path code to use
REQ_FLUSH + REQ_FUA hints when determining WRITE_FUA usage, and make SPC
emulation code use a spc_check_dev_wce() helper to handle both types of
cases for virtual backend subsystem drivers.

(asias: Drop unnecessary comparsion operators)

Reported-by: majianpeng 
Cc: majianpeng 
Cc: Christoph Hellwig 
Cc: Jens Axboe 
Cc: James Bottomley 
Signed-off-by: Nicholas Bellinger

target: Fix divide by zero bug in fabric_max_sectors for unconfigured devices

2013-01-31T23:22:53+00:00

This patch fixes a possible divide by zero bug when the fabric_max_sectors
device attribute is written and backend se_device failed to be successfully
configured -> enabled.

Go ahead and use block_size=512 within se_dev_set_fabric_max_sectors()
in the event of a target_configure_device() failure case, as no valid
dev->dev_attrib.block_size value will have been setup yet.

Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger

target: Add link_magic for fabric allow_link destination target_items

2012-12-05T08:11:36+00:00

This patch adds [dev,lun]_link_magic value assignment + checks within generic
target_fabric_port_link() and target_fabric_mappedlun_link() code to ensure
destination config_item *target_item sent from configfs_symlink() ->
config_item_operations->allow_link() is the underlying se_device->dev_group
and se_lun->lun_group that we expect to symlink.

Reported-by: Sebastian Andrzej Siewior 
Cc: Sebastian Andrzej Siewior 
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger

2012-11-28T06:47:02+00:00

v2: Use correct target_core_stat.c 2006 copyright year
v3: Drop extra unnessary legal verbage from header (hch)

Cc: Christoph Hellwig 
Signed-off-by: Nicholas Bellinger

target: Add/check max_write_same_len device attribute + update block limits VPD

2012-11-15T20:27:21+00:00

This patch adds a new max_write_same_len device attribute for use with
WRITE_SAME w/ UNMAP=0 backend emulation.  This can be useful for
lowering the default backend value (IBLOCK uses 0xFFFF).

Also, update block limits VPD emulation code in spc_emulate_evpd_b0() to
report MAXIMUM WRITE SAME LENGTH, and enforce max_write_same_len during
sbc_parse() -> sbc_setup_write_same() CDB sanity checking for all emulated
WRITE_SAME w/ UNMAP=0 cases.

(Robert: Move max_write_same_len check in sbc_setup_write_same() to
         check both WRITE_SAME w/ UNMAP=1 and w/ UNMAP=0 cases)

Cc: Christoph Hellwig 
Cc: Martin K. Petersen 
Cc: Robert Elliott 
Signed-off-by: Nicholas Bellinger