linux-stable.git/include/target/target_core_base.h, branch v4.2.4

Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

2015-07-04T21:13:43+00:00

Pull SCSI target updates from Nicholas Bellinger:
 "It's been a busy development cycle for target-core in a number of
  different areas.

  The fabric API usage for se_node_acl allocation is now within
  target-core code, dropping the external API callers for all fabric
  drivers tree-wide.

  There is a new conversion to RCU hlists for se_node_acl and
  se_portal_group LUN mappings, that turns fast-past LUN lookup into a
  completely lockless code-path.  It also removes the original
  hard-coded limitation of 256 LUNs per fabric endpoint.

  The configfs attributes for backends can now be shared between core
  and driver code, allowing existing drivers to use common code while
  still allowing flexibility for new backend provided attributes.

  The highlights include:

   - Merge sbc_verify_dif_* into common code (sagi)
   - Remove iscsi-target support for obsolete IFMarker/OFMarker
     (Christophe Vu-Brugier)
   - Add bidi support in target/user backend (ilias + vangelis + agover)
   - Move se_node_acl allocation into target-core code (hch)
   - Add crc_t10dif_update common helper (akinobu + mkp)
   - Handle target-core odd SGL mapping for data transfer memory
     (akinobu)
   - Move transport ID handling into target-core (hch)
   - Move task tag into struct se_cmd + support 64-bit tags (bart)
   - Convert se_node_acl->device_list[] to RCU hlist (nab + hch +
     paulmck)
   - Convert se_portal_group->tpg_lun_list[] to RCU hlist (nab + hch +
     paulmck)
   - Simplify target backend driver registration (hch)
   - Consolidate + simplify target backend attribute implementations
     (hch + nab)
   - Subsume se_port + t10_alua_tg_pt_gp_member into se_lun (hch)
   - Drop lun_sep_lock for se_lun->lun_se_dev RCU usage (hch + nab)
   - Drop unnecessary core_tpg_register TFO parameter (nab)
   - Use 64-bit LUNs tree-wide (hannes)
   - Drop left-over TARGET_MAX_LUNS_PER_TRANSPORT limit (hannes)"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (76 commits)
  target: Bump core version to v5.0
  target: remove target_core_configfs.h
  target: remove unused TARGET_CORE_CONFIG_ROOT define
  target: consolidate version defines
  target: implement WRITE_SAME with UNMAP bit using ->execute_unmap
  target: simplify UNMAP handling
  target: replace se_cmd->execute_rw with a protocol_data field
  target/user: Fix inconsistent kmap_atomic/kunmap_atomic
  target: Send UA when changing LUN inventory
  target: Send UA upon LUN RESET tmr completion
  target: Send UA on ALUA target port group change
  target: Convert se_lun->lun_deve_lock to normal spinlock
  target: use 'se_dev_entry' when allocating UAs
  target: Remove 'ua_nacl' pointer from se_ua structure
  target_core_alua: Correct UA handling when switching states
  xen-scsiback: Fix compile warning for 64-bit LUN
  target: Remove TARGET_MAX_LUNS_PER_TRANSPORT
  target: use 64-bit LUNs
  target: Drop duplicate + unused se_dev_check_wce
  target: Drop unnecessary core_tpg_register TFO parameter
  ...

target: Bump core version to v5.0

2015-06-23T07:45:14+00:00

Signed-off-by: Nicholas Bellinger

target: consolidate version defines

2015-06-23T07:43:48+00:00

Signed-off-by: Christoph Hellwig 
Reviewed-by: Andy Grover 
Signed-off-by: Nicholas Bellinger

target: replace se_cmd->execute_rw with a protocol_data field

2015-06-23T07:43:42+00:00

Instead of leaking this SBC read/write implementation detail just add an
opaqueue protocol specific pointer to struct se_cmd that we can assign
the sbc_ops vector to.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Andy Grover 
Signed-off-by: Nicholas Bellinger

target: Remove 'ua_nacl' pointer from se_ua structure

2015-06-16T07:38:29+00:00

Unused.

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

target: Remove TARGET_MAX_LUNS_PER_TRANSPORT

2015-06-16T06:26:03+00:00

LUN allocation is now fully dynamic, so there is no need to
artificially restrain the number of exported LUNs.

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

target: use 64-bit LUNs

2015-06-16T06:26:01+00:00

As we're now using a list to hold the LUNs the target core
can now converted to use 64-bit LUNs internally.

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

target: Minimize SCSI header #include directives

2015-06-02T15:03:25+00:00

Only include SCSI initiator header files in target code that needs
these header files, namely the SCSI pass-through code and the tcm_loop
driver. Change SCSI_SENSE_BUFFERSIZE into TRANSPORT_SENSE_BUFFER in
target code because the former is intended for initiator code and the
latter for target code. With this patch the only initiator include
directives in target code that remain are as follows:

$ git grep -nHE 'include .scsi/(scsi.h|scsi_host.h|scsi_device.h|scsi_cmnd.h)' drivers/target drivers/infiniband/ulp/{isert,srpt} drivers/usb/gadget/legacy/tcm_*.[ch] drivers/{vhost,xen} include/{target,trace/events/target.h}
drivers/target/loopback/tcm_loop.c:29:#include 
drivers/target/loopback/tcm_loop.c:31:#include 
drivers/target/loopback/tcm_loop.c:32:#include 
drivers/target/loopback/tcm_loop.c:33:#include 
drivers/target/target_core_pscsi.c:39:#include 
drivers/target/target_core_pscsi.c:40:#include 
drivers/xen/xen-scsiback.c:52:#include  /* SG_ALL */

Signed-off-by: Bart Van Assche 
Reviewed-by: Christoph Hellwig 
Signed-off-by: James Bottomley

target: Correct a comment

2015-06-02T15:03:25+00:00

Correct the comment above the definition of TCM_MAX_COMMAND_SIZE.
A quote from Christoph:

    There aren't any legacy issues, we just decided to handle >
    16 byte CDBs in the slow path.

Signed-off-by: Bart Van Assche 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Hannes Reinecke 
Signed-off-by: James Bottomley

target: Drop se_lun->lun_active for existing percpu lun_ref

2015-06-01T07:27:56+00:00

With se_port_t and t10_alua_tg_pt_gp_member being absored into se_lun,
there is no need for an extra atomic_t based reference count for PR
ALL_TG_PT=1 and ALUA access state transition.

Go ahead and use the existing percpu se_lun->lun_ref instead, and
convert the two special cases to percpu_ref_tryget_live() to avoid
se_lun if transport_clear_lun_ref() has already been invoked to
shutdown the se_lun.

Cc: Christoph Hellwig 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Nicholas Bellinger