04 Oct, 2014
1 commit
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This patch adds a force_pr_aptpl device attribute used to force SPC-3 PR
Activate Persistence across Target Power Loss (APTPL) operation. This
makes PR metadata write-out occur during state change regardless if new
PERSISTENT_RESERVE_OUT CDBs have their APTPL feature bit set.This is useful during H/A failover in active/passive setups where all PR
state is being re-created on a different node, driven by configfs backend
device + export layout and pre-loaded $DEV/pr/res_aptpl_metadata.Cc: Mike Christie
Signed-off-by: Nicholas Bellinger
02 Oct, 2014
2 commits
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Remove core_tpg_pre_dellun entirely, since we don't need to get/check
a pointer we already have.Nothing else can return an error, so core_dev_del_lun can return void.
Rename core_tpg_post_dellun to remove_lun - a clearer name, now that
pre_dellun is gone.Reviewed-by: Christoph Hellwig
Signed-off-by: Andy Grover
Signed-off-by: Nicholas Bellinger -
Nothing in it can raise an error.
Reviewed-by: Christoph Hellwig
Signed-off-by: Andy Grover
Signed-off-by: Nicholas Bellinger
18 Jan, 2014
1 commit
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This patch adds support for exposing DIF protection device
attributes via configfs. This includes:pi_prot_type: Protection Type (0, 1, 3 currently support)
pi_prot_format: Protection Format Operation (FILEIO only)Within se_dev_set_pi_prot_type() it also adds the se_subsystem_api
device callbacks to setup per device protection information.v2 changes:
- Drop pi_guard_type + pi_prot_version related code (MKP)
- Add pi_prot_format logic (Sagi)
- Add ->free_prot callback in target_free_device
- Add hw_pi_prot_type read-only attributeCc: Martin K. Petersen
Cc: Christoph Hellwig
Cc: Hannes Reinecke
Cc: Sagi Grimberg
Cc: Or Gerlitz
Signed-off-by: Nicholas Bellinger
17 Dec, 2013
2 commits
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Especially since it's actually a device.
Signed-off-by: Andy Grover
Signed-off-by: Nicholas Bellinger -
"pre" is really an allocation function. The only time it isn't called is
for virtual_lun0, which is statically allocated. Renaming that to "alloc"
lets the other function not need to be "post", and just be called
core_tpg_add_lun.(nab: fix minor applying fuzz in core_tpg_setup_virtual_lun0)
Signed-off-by: Andy Grover
Signed-off-by: Nicholas Bellinger
08 Nov, 2013
1 commit
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This patch adds percpu refcounting for se_lun access that allows the
association of an se_lun + se_cmd in transport_lookup_cmd_lun() to
occur without an extra list_head for tracking outstanding I/O during
se_lun shutdown.This effectively changes se_lun shutdown logic to wait for outstanding
I/O percpu references to complete in transport_lun_remove_cmd() using
se_lun->lun_ref_comp, instead of explicitly draining the per se_lun
command list and waiting for individual se_cmd descriptor processing
to complete.Cc: Kent Overstreet
Signed-off-by: Nicholas Bellinger
24 Oct, 2013
1 commit
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Export symbol core_tpg_check_initiator_node_acl and move prototype from the
private drivers/target/target_core_internal.h to the public
include/target/target_core_fabric.hSigned-off-by: Thomas Glanzmann
Signed-off-by: Nicholas Bellinger
11 Sep, 2013
1 commit
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This patch adds the Third Party Copy (3PC) bit to signal support
for EXTENDED_COPY within standard inquiry response data.Also add emulate_3pc device attribute in configfs (enabled by default)
to allow the exposure of this bit to be disabled, if necessary.Cc: Christoph Hellwig
Cc: Hannes Reinecke
Cc: Martin Petersen
Cc: Chris Mason
Cc: Roland Dreier
Cc: Zach Brown
Cc: James Bottomley
Cc: Nicholas Bellinger
Signed-off-by: Nicholas Bellinger
10 Sep, 2013
1 commit
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This patch adds the MAXIMUM COMPARE AND WRITE LENGTH bit, currently
hardcoded to a single logical block (NoLB=1) within the Block Limits
VPD in spc_emulate_evpd_b0().Also add emulate_caw device attribute in configfs (enabled by default)
to allow the exposure of this bit to be disabled, if necessary.Cc: Christoph Hellwig
Cc: Hannes Reinecke
Cc: Martin Petersen
Cc: Chris Mason
Cc: James Bottomley
Cc: Nicholas Bellinger
Signed-off-by: Nicholas Bellinger
04 May, 2013
1 commit
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Some were incremented, but never used anywhere from what I could tell.
Signed-off-by: Andy Grover
Signed-off-by: Nicholas Bellinger
19 Feb, 2013
1 commit
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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
14 Feb, 2013
1 commit
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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
16 Nov, 2012
1 commit
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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
07 Nov, 2012
3 commits
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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 -
Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
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
17 Jul, 2012
6 commits
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Code was almost entirely divided based on value of bool param "enable".
Split it into two functions.
Signed-off-by: Andy Grover
Signed-off-by: Nicholas Bellinger -
Only used in a debugprint, and function signature is cleaner now.
Signed-off-by: Andy Grover
Signed-off-by: Nicholas Bellinger -
Since "target: Drop se_device TCQ queue_depth usage from I/O path" we always
submit all commands (or back then, tasks) from __transport_execute_tasks.That means the the execute list has lots its purpose, as we can simply
submit the commands that are restarted in transport_complete_task_attr
directly while we walk the list. In fact doing so also solves a race
in the way it currently walks to delayed_cmd_list as well.Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
Move the existing code in target_core_cdb.c into the files for the command
sets that the emulations implement.(roland + nab: Squash patch: Fix range calculation in WRITE SAME emulation
when num blocks == 0s)Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
Instead of trying to handle all SCSI command sets in one function
(transport_generic_cmd_sequencer) call out to the backend driver to perform
this functionality. For pSCSI a copy of the existing code is used, but for
all virtual backends we can use a new parse_sbc_cdb helper is used to
provide a simple SBC emulation.For now this setups means a fair amount of duplication between pSCSI and the
SBC library, but patches later in this series will sort out that problem.(nab: Fix up build failure in target_core_pscsi.c)
Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
(nab: Add EXPORT_SYMBOL usage for spc_parse_cdb)
Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger
07 May, 2012
2 commits
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Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger -
Make CDB emulation work on commands instead of tasks again as a preparation
of removing tasks completely.Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger
26 Feb, 2012
2 commits
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se_dev_attrib.max_sectors currently has two independent meanings:
- It is reported in the block limits VPD page as the maximum transfer
length, ie the largest IO that the front-end (fabric) can handle.
Also the target core doesn't enforce this maximum transfer length.- It is used to hold the size of the largest IO that the back-end can
handle, so we know when to split SCSI commands into multiple tasks.Fix this by adding a new se_dev_attrib.fabric_max_sectors to hold the
maximum transfer length, and checking incoming IOs against that limit.Signed-off-by: Roland Dreier
Signed-off-by: Nicholas Bellinger -
This patch adds initial support for TMR_ABORT_TASK ops for se_cmd
descriptors using se_sess->sess_cmd_list and se_cmd->cmd_kref counting.It will perform an explict abort for all outstanding se_cmd ops based
upon tmr->ref_task_tag that have not been set CMD_T_COMPLETE.
It will cancel se_cmd->work and wait for backing I/O to complete before
attempting to send SAM_STAT_TASK_ABORTED and perform
target_put_sess_cmd() to release the referenced descriptor.It also adds a CMD_T_ABORTED check into transport_complete_task() to
catch the completion from backend I/O that has been aborted, and
updates transport_wait_for_tasks() to allow CMD_T_ABORTED usage with
core_tmr_abort_task() context.Reported-by: Roland Dreier
Cc: Christoph Hellwig
Signed-off-by: Nicholas Bellinger
18 Jan, 2012
1 commit
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- core_tpg_pre_addlun()
returns always ERR_PTR() or the pointer, never NULL. The additional
check for NULL in core_dev_add_lun() is not required.- core_tpg_pre_dellun()
returns always ERR_PTR() or the pointer, never NULL. The check for NULL
in core_dev_del_lun() is wrong. The third argument (int *) is never
used, remove it.- core_dev_add_lun()
returns always NULL or the pointer, never ERR_PTR. The check for
IS_ERR() is not required.(nab: Convert core_dev_add_lun() use err.h macros for failure
handling to be consistent with the rest of target_core_fabric_configfs.c
callers)Signed-off-by: Sebastian Andrzej Siewior
Cc:
Signed-off-by: Nicholas Bellinger
14 Dec, 2011
1 commit
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Create a new headers, drivers/target/target_core_internal.h that is supposed
to hold all target_core-internal prototypes. Move all non-exported includes
from include/target to it, and merge the smaller prototype-only includes
inside drivers/target into it as well. Mark functions that were found to
not be called outside their implementation file static.Signed-off-by: Christoph Hellwig
Signed-off-by: Nicholas Bellinger