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Christophe Vu-Brugier 9bc6548f37 target: do not reject FUA CDBs when write cache is enabled but emulate_write_cache is 0 
A check that rejects a CDB with FUA bit set if no write cache is
emulated was added by the following commit:

  fde9f50 target: Add sanity checks for DPO/FUA bit usage

The condition is as follows:

  if (!dev->dev_attrib.emulate_fua_write ||
      !dev->dev_attrib.emulate_write_cache)

However, this check is wrong if the backend device supports WCE but
"emulate_write_cache" is disabled.

This patch uses se_dev_check_wce() (previously named
spc_check_dev_wce) to invoke transport->get_write_cache() if the
device has a write cache or check the "emulate_write_cache" attribute
otherwise.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christophe Vu-Brugier <cvubrugier@fastmail.fm>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
 		2015-03-19 23:26:46 -07:00
..
iscsi iscsi-target: Avoid early conn_logout_comp for iser connections 2015-03-19 23:10:01 -07:00
loopback loop/usb/vhost-scsi/xen-scsiback: Fix use of __transport_register_session 2015-03-19 23:15:14 -07:00
sbp scsi: remove MSG_*_TAG defines 2014-12-04 09:58:33 +01:00
tcm_fc tcm_fc: missing curly braces in ft_invl_hw_context() 2015-03-19 23:26:41 -07:00
Kconfig target: Add a user-passthrough backstore 2014-10-03 11:15:20 -07:00
Makefile target: Add a user-passthrough backstore 2014-10-03 11:15:20 -07:00
target_core_alua.c scsi: rename SERVICE_ACTION_IN to SERVICE_ACTION_IN_16 2014-11-24 20:01:40 +01:00
target_core_alua.h target_core_alua: Referrals configfs integration 2014-01-09 21:48:35 -08:00
target_core_configfs.c target: Drop left-over internal dev attribute code 2014-12-01 21:36:21 -08:00
target_core_device.c target: do not reject FUA CDBs when write cache is enabled but emulate_write_cache is 0 2015-03-19 23:26:46 -07:00
target_core_fabric_configfs.c target: Change core_dev_del_lun to take a se_lun instead of unpacked_lun 2014-10-01 14:38:48 -07:00
target_core_fabric_lib.c target: fix pr_out length in iscsi_parse_pr_out_transport_id 2014-09-17 15:17:35 -07:00
target_core_file.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-02-21 13:21:19 -08:00
target_core_file.h Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-01-31 15:31:23 -08:00
target_core_hba.c target: Move dev_cit to struct se_subsystem_api 2014-12-01 21:35:22 -08:00
target_core_iblock.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-02-21 13:21:19 -08:00
target_core_iblock.h target: kill struct se_subsystem_dev 2012-11-06 20:55:43 -08:00
target_core_internal.h target: Add EXPORT_SYMBOL for existing se_dev_set_* 2014-12-01 21:36:02 -08:00
target_core_pr.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-02-21 13:21:19 -08:00
target_core_pr.h target: Fix APTPL metadata handling for dynamic MappedLUNs 2014-10-04 05:40:19 +00:00
target_core_pscsi.c target/pscsi: Fix NULL pointer dereference in get_device_type 2015-03-19 23:26:42 -07:00
target_core_pscsi.h target: kill struct se_subsystem_dev 2012-11-06 20:55:43 -08:00
target_core_rd.c target: Drop left-over fabric_max_sectors attribute 2015-01-09 15:22:05 -08:00
target_core_rd.h target/rd: Add support for protection SGL setup + release 2014-01-19 02:22:05 +00:00
target_core_sbc.c target: do not reject FUA CDBs when write cache is enabled but emulate_write_cache is 0 2015-03-19 23:26:46 -07:00
target_core_spc.c target: do not reject FUA CDBs when write cache is enabled but emulate_write_cache is 0 2015-03-19 23:26:46 -07:00
target_core_stat.c target: Convert se_device statistics to atomic_long_t 2013-11-13 18:34:55 -08:00
target_core_tmr.c target: simplify core_tmr_abort_task 2014-10-01 14:39:10 -07:00
target_core_tpg.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-10-21 13:06:38 -07:00
target_core_transport.c target: Fix reference leak in target_get_sess_cmd() error path 2015-03-19 23:26:31 -07:00
target_core_ua.c target: encapsulate smp_mb__after_atomic() 2014-10-01 14:39:06 -07:00
target_core_ua.h target: target_core_ua_h: Add #define of include guard 2014-09-15 14:27:43 -07:00
target_core_user.c netlink: make nlmsg_end() and genlmsg_end() void 2015-01-18 01:03:45 -05:00
target_core_xcopy.c treewide: fix typo in printk and Kconfig 2014-11-20 14:56:11 +01:00
target_core_xcopy.h target: Add support for EXTENDED_COPY copy offload emulation 2013-09-10 16:48:43 -07:00