linux-toradex.git/drivers/target/target_core_iblock.h, branch v4.9.120

target: kill struct se_subsystem_dev

2012-11-07T04:55:43+00:00

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/iblock: Add parameter to specify read-only devices

2012-07-17T00:29:11+00:00

see https://bugzilla.redhat.com/show_bug.cgi?id=818855

Adds a parameter so read-only block devices may be registered as
LIO backstores.

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

target: remove struct se_task

2012-05-06T22:11:26+00:00

We can use struct se_cmd for everything it did.  Make sure to pass the S/G
list and data direction to the execution function to ease adding back BIDI
support later on.

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

target: increase iblock task sizes

2012-02-25T22:37:46+00:00

There is no real limit for task sizes in the iblock driver given that we
can chain bios.  Increase the maximum size to UINT_MAX, and change the
code to submit bios in a smaller batch size to avoid deadlocks when
having more bios in flight than the pool supports.  Also increase the
pool size to always allow multiple tasks to be in flight.

I also had to change the task refcounting to include one reference for
the submission task, which is a standard practice in this kind of code
in Linux (e.g. XFS I/O submission).  This was wrong before, but couldn't
be hit easily.

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

target: remove the unused struct iblock_hba

2012-02-25T22:37:46+00:00

There is no reason to allocate a struct just to store the host number for
a debug printk in the detach path.  I've simply removed the verbose
debugging given that the calling code thinks the number passed in is
something different from a host ID anyway.

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

target: make the ->get_cdb method optional

2011-10-24T03:21:11+00:00

The most commonly used file, iblock and rd backends have no use for
a per-task CDB and thus don't need a method to copy it into their
otherwise unused CDB fields.

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

target: cleanup iblock bio submission

2011-10-24T03:20:43+00:00

Move the entirely bio allocation, mapping and submission into ->do_task.
This

 a) avoids blocking the I/O submission thread unessecarily, and
 b) simplifies the code greatly

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

target: Follow up core updates from AGrover and HCH (round 4)

2011-07-22T09:37:48+00:00

This patch contains the squashed version of forth round series cleanups
from Andy and Christoph following the post heavy lifting in the preceeding:
'Eliminate usage of struct se_mem' and 'Make all control CDBs scatter-gather'
changes.  This also includes a conversion of target core and the v3.0
mainline fabric modules (loopback and tcm_fc) to use pr_debug and the
CONFIG_DYNAMIC_DEBUG infrastructure!

These have been squashed into this third and final round for v3.1.

target: Remove ifdeffed code in t_g_process_write
target: Remove direct ramdisk code
target: Rename task_sg_num to task_sg_nents
target: Remove custom debug macros for pr_debug. Use pr_err().
target: Remove custom debug macros in mainline fabrics
target: Set WSNZ=1 in block limits VPD. Abort if WRITE_SAME sectors = 0
target: Remove transport do_se_mem_map callback
target: Further simplify transport_free_pages
target: Redo task allocation return value handling
target: Remove extra parentheses
target: change alloc_task call to take *cdb, not *cmd

(nab: Fix bogus struct file assignments in fd_do_readv and fd_do_writev)

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

target/iblock: Remove unused iblock_dev members

2011-07-22T09:37:46+00:00

ibd_depth and ibd_force are used write-only.  Remove them.
ibd_major/minor can be easily retrieved from ibd_bd, so get
rid of them too.

Signed-off-by: Roland Dreier 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Nicholas Bellinger

target/iblock: Use request_queue->nr_request for se_device defaults

2011-07-22T09:37:45+00:00

This patch converts iblock_create_virtdevice() to use request_queue->nr_request
for se_dev_limits usage of ->hw_queue_depth and ->queue_depth for individual
struct se_device export.

It also removes the now unused defines for IBLOCK_DEVICE_QUEUE_DEPTH and
IBLOCK_MAX_DEVICE_QUEUE_DEPTH

Signed-off-by: Nicholas Bellinger