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Date: Fri, 27 Mar 2009 01:46:32 -0700
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: linux-scsi <linux-scsi@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>
Cc: James Bottomley <James.Bottomley@...senPartnership.com>,
Mike Christie <michaelc@...wisc.edu>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Hannes Reinecke <hare@...e.de>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Alan Stern <stern@...land.harvard.edu>,
Douglas Gilbert <dgilbert@...erlog.com>,
Alasdair G Kergon <agk@...hat.com>,
Philipp Reisner <philipp.reisner@...bit.com>,
Ming Zhang <blackmagic02881@...il.com>
Subject: [PATCH] [Target_Core_Mod/Persistent_Reservations]: Add support for
PREEMPT_AND_ABORT SA
Greetings all,
This patch adds support for the PROUT PREEMPT_AND_ABORT service action to
core_scsi3_emulate_pro_preempt() and core_tmr_lun_reset() using existing TAS
(TASK_ABORTED status) emulation. The logic assigns the initiator port
provided pre-registered reservation key to allocated SCSI Task and Task Management
through logical unit ACLs in target_core_mod code.
This patch uses struct list_head preempt_and_abort_list inside of
core_scsi3_emulate_pro_preempt() to track PR registrations/reservation
data structure t10_pr_registration_t once it has been removed from the
se_device_t list, and before they get released back into struct kmem_cache
t10_pr_reg_cache in core_scsi3_release_preempt_and_abort().
These patches are made against lio-core-2.6.git/master and tested on
v2.6.29 x86 32-bit HVM using sg_persist and sg_request from sg3_utils.
The lio-core-2.6.git tree can be found at:
http://git.kernel.org/?p=linux/kernel/git/nab/lio-core-2.6.git;a=summary
So far, I have been primarily testing the following scenario, which is what
linux-cluster userspace in RHEL/CentOS (and everyone else) does with fence_scsi
today for their WRITE Exclusive, Registrants Only persistent
reservation setup. Here is test setup I am using:
# The same /sys/kernel/config/target/core/$HBA/$DEV Linux LVM object mapped across
# two different LIO-Target iSCSI target ports
initiator# lsscsi --transport
[3:0:0:0] disk iqn.2003-01.org.linux-iscsi.target.i686:sn.cff3eedbd2fd,t,0x1 /dev/sde
[4:0:0:0] disk iqn.2003-01.org.linux-iscsi.target.i686:sn.e475ed6fcdd0,t,0x1 /dev/sdf
*) Initiator side using Open/iSCSI:
[ 185.682972] scsi3 : iSCSI Initiator over TCP/IP
[ 185.998817] scsi 3:0:0:0: Direct-Access LIO-ORG IBLOCK 3.0 PQ: 0 ANSI: 5
[ 186.009172] sd 3:0:0:0: [sde] 128000 4096-byte hardware sectors (524 MB)
[ 186.013274] sd 3:0:0:0: [sde] Write Protect is off
[ 186.013286] sd 3:0:0:0: [sde] Mode Sense: 2f 00 00 00
[ 186.034372] sd 3:0:0:0: [sde] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 186.045854] sd 3:0:0:0: [sde] 128000 4096-byte hardware sectors (524 MB)
[ 186.054955] sd 3:0:0:0: [sde] Write Protect is off
[ 186.054967] sd 3:0:0:0: [sde] Mode Sense: 2f 00 00 00
[ 186.072648] sd 3:0:0:0: [sde] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 186.073401] sde: unknown partition table
[ 186.084108] sd 3:0:0:0: [sde] Attached SCSI disk
[ 186.085052] sd 3:0:0:0: Attached scsi generic sg4 type 0
[ 186.316470] alua: device handler registered
[ 186.321957] sd 3:0:0:0: alua: supports implicit TPGS
[ 186.326881] sd 3:0:0:0: alua: port group 00 rel port 02
[ 186.331445] sd 3:0:0:0: alua: port group 00 state A supports tousNA
[ 186.372696] sd 3:0:0:0: alua: port group 00 state A supports tousNA
[ 188.204172] scsi4 : iSCSI Initiator over TCP/IP
[ 188.481410] scsi 4:0:0:0: Direct-Access LIO-ORG IBLOCK 3.0 PQ: 0 ANSI: 5
[ 188.489828] sd 4:0:0:0: [sdf] 128000 4096-byte hardware sectors (524 MB)
[ 188.497081] sd 4:0:0:0: [sdf] Write Protect is off
[ 188.497093] sd 4:0:0:0: [sdf] Mode Sense: 2f 00 00 00
[ 188.512344] sd 4:0:0:0: [sdf] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 188.525858] sd 4:0:0:0: [sdf] 128000 4096-byte hardware sectors (524 MB)
[ 188.534314] sd 4:0:0:0: [sdf] Write Protect is off
[ 188.534325] sd 4:0:0:0: [sdf] Mode Sense: 2f 00 00 00
[ 188.550966] sd 4:0:0:0: [sdf] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 188.557596] sdf: unknown partition table
# Register both ports
initiator# sg_persist --out --register --param-sark=0x1234abcd -Y -v /dev/sde
initiator# sg_persist --out --register --param-sark=0x4567ffff -Y -v /dev/sdf
# Create a write exclusive, registrants only persistent reservation
initiator# sg_persist --out --reserve --param-rk=0x1234abcd --prout-type=5 -v /dev/sde
... Start running READ/WRITE I/O to /dev/sde ...
# Preempt the reservation on /dev/sdf using /dev/sde's reservation key..
initiator# sg_persist --out --preempt-abort --param-rk=0x4567ffff --param-sark=0x1234abcd --prout-type 5 -v /dev/sdf
[ 199.570148] sd 3:0:0:0: reservation conflict
[ 205.461349] sd 3:0:0:0: reservation conflict
[ 205.462076] sd 3:0:0:0: [sde] Result: hostbyte=DID_OK driverbyte=DRIVER_OK,SUGGEST_OK
[ 205.462228] end_request: I/O error, dev sde, sector 384
[ 205.480997] sd 3:0:0:0: reservation conflict
[ 205.481013] sd 3:0:0:0: [sde] Result: hostbyte=DID_OK driverbyte=DRIVER_OK,SUGGEST_OK
# Re-Register on the port that has been preempted
initiator# sg_persist --out --register --param-sark=0x1234abcd -Y -v /dev/sde
... Start running READ/WRITE I/O to /dev/sdf ..
# Preempt the reservation on /dev/sde using /dev/sdf's reservation key..
initiator# sg_persist --out --preempt-abort --param-rk=0x1234abcd --param-sark=0x4567ffff --prout-type 5 -v /dev/sde
[ 269.379004] sd 4:0:0:0: reservation conflict
[ 269.379021] sd 4:0:0:0: [sdf] Result: hostbyte=DID_OK driverbyte=DRIVER_OK,SUGGEST_OK
[ 269.379030] end_request: I/O error, dev sdf, sector 1280
[ 269.414193] sd 4:0:0:0: reservation conflict
[ 269.414210] sd 4:0:0:0: [sdf] Result: hostbyte=DID_OK driverbyte=DRIVER_OK,SUGGEST_OK
[ 269.414219] end_request: I/O error, dev sdf, sector 1024
and so on..
So far, things are looking good on the lio-core-2.6.git side, however I am able to trigger a BUG() from
time to time in Open/iSCSI Initiator when returning include/scsi/scsi.h:SAM_STAT_TASK_ABORTED when TAS=1 in
target_core_mod/ConfigFS, but other than that things are looking good with small amounts of outstanding CDBs
being preempted and aborted. Sometimes the Open/iSCSI client side does a bus reset (restart the iSCSI session)
instead of processing TASK_ABORTED status (which appear to be getting sent from target_core_mod), not sure if
this is related to the BUG() that is triggered or not (will CC Open-iSCSI list).
*) Target side using lio-core-2.6.git on v2.6.29:
<SNIP>
SPC-3 PR [iSCSI] Service Action: REGISTER Initiator Node: iqn.1993-08.org.debian:01:2dadf92d0ef
SPC-3 PR [iSCSI] for ALL TCM Subsystem iblock Object Target Port(s)
SPC-3 PR [iSCSI] SA Res Key: 0x000000001234abcd PRgeneration: 0x00000013
SPC-3 PR [iSCSI] Service Action: implict RELEASE cleared reservation holder TYPE: Write Exclusive Access, Registrants Only ALL_TG_PT: 1
SPC-3 PR [iSCSI] RELEASE Node: iqn.1993-08.org.debian:01:2dadf92d0ef
SPC-3 PR [iSCSI] Service Action: UNREGISTER Initiator Node: iqn.1993-08.org.debian:01:2dadf92d0ef
SPC-3 PR [iSCSI] for ALL TCM Subsystem iblock Object Target Port(s)
SPC-3 PR [iSCSI] SA Res Key: 0x000000004567ffff PRgeneration: 0x00000011
[iSCSI]: Allocated UNIT ATTENTION, mapped LUN: 0, ASC: 0x2a, ASCQ: 0x03
SPC-3 PR [iSCSI] Service Action: PREEMPT_AND_ABORT created new reservation holder TYPE: Write Exclusive Access, Registrants Only ALL_TG_PT: 1
SPC-3 PR [iSCSI] PREEMPT_AND_ABORT from Node: iqn.1993-08.org.debian:01:2dadf92d0ef
LUN_RESET: Preempt starting for [iblock], tas: 1
LUN_RESET: Preempt cmd: d3b5a300 task: d3193200 ITT/CmdSN: 0x2b000010/0x00000000, i_state: 1, t_state/def_t_state: 243/0 cdb: 0x2a
LUN_RESET: ITT[0x2b000010] - pr_res_key: 0x000000004567ffff t_task_cdbs: 1 t_task_cdbs_left: 1 t_task_cdbs_sent: 0 -- t_transport_active: 0 t_transport_stop: 0 t_transport_sent: 0
LUN_RESET: Got t_transport_active = 0 for task: d3193200, t_fe_count: 1 dev: dec3f000
LUN_RESET: Preempt for [iblock] Complete
[iSCSI]: Releasing UNIT ATTENTION condition with INTLCK_CTRL: 0, mapped LUN: 0, got CDB: 0x2a reported ASC: 0x2a, ASCQ: 0x03
Conflict for WRITE CDB: 0x2a to Write Exclusive Access, Registrants Only reservation
Conflict for WRITE CDB: 0x2a to Write Exclusive Access, Registrants Only reservation
Conflict for WRITE CDB: 0x2a to Write Exclusive Access, Registrants Only reservation
Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
drivers/lio-core/target_core_base.h | 4 +
drivers/lio-core/target_core_device.c | 2 +
drivers/lio-core/target_core_pr.c | 201 +++++++++++++++++++++---------
drivers/lio-core/target_core_pr.h | 2 +
drivers/lio-core/target_core_tmr.c | 164 +++++++++++++++++-------
drivers/lio-core/target_core_tmr.h | 3 +-
drivers/lio-core/target_core_transport.c | 8 +-
7 files changed, 270 insertions(+), 114 deletions(-)
diff --git a/drivers/lio-core/target_core_base.h b/drivers/lio-core/target_core_base.h
index 5849a1f..5935d9b 100644
--- a/drivers/lio-core/target_core_base.h
+++ b/drivers/lio-core/target_core_base.h
@@ -294,6 +294,7 @@ typedef struct t10_pr_registration_s {
struct se_dev_entry_s *pr_reg_deve;
struct se_lun_s *pr_reg_tg_pt_lun;
struct list_head pr_reg_list;
+ struct list_head pr_reg_abort_list;
} t10_pr_registration_t;
typedef struct t10_reservation_template_s {
@@ -472,6 +473,8 @@ typedef struct se_cmd_s {
u32 iov_data_count;
/* Number of iovecs allocated for iscsi_cmd_t->iov_data */
u32 orig_iov_data_count;
+ /* Persistent Reservation key */
+ u64 pr_res_key;
atomic_t transport_sent;
/* Used for sense data */
void *sense_buffer;
@@ -604,6 +607,7 @@ typedef struct se_dev_entry_s {
u32 last_byte_count;
u32 total_cmds;
u32 total_bytes;
+ u64 pr_res_key;
#ifdef SNMP_SUPPORT
u64 creation_time;
u32 attach_count;
diff --git a/drivers/lio-core/target_core_device.c b/drivers/lio-core/target_core_device.c
index 95ab18d..a3db481 100644
--- a/drivers/lio-core/target_core_device.c
+++ b/drivers/lio-core/target_core_device.c
@@ -266,6 +266,7 @@ extern int __transport_get_lun_for_cmd(
deve->deve_cmds++;
se_lun = se_cmd->se_lun = deve->se_lun;
+ se_cmd->pr_res_key = deve->pr_res_key;
se_cmd->orig_fe_lun = unpacked_lun;
se_cmd->se_orig_obj_api = SE_LUN(se_cmd)->lun_obj_api;
se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_type_ptr;
@@ -346,6 +347,7 @@ extern int transport_get_lun_for_tmr(
if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun;
dev = se_tmr->tmr_dev = se_lun->se_dev;
+ se_cmd->pr_res_key = deve->pr_res_key;
se_cmd->orig_fe_lun = unpacked_lun;
se_cmd->se_orig_obj_api = SE_LUN(se_cmd)->lun_obj_api;
se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_type_ptr;
diff --git a/drivers/lio-core/target_core_pr.c b/drivers/lio-core/target_core_pr.c
index f55c59d..0f4772e 100644
--- a/drivers/lio-core/target_core_pr.c
+++ b/drivers/lio-core/target_core_pr.c
@@ -36,6 +36,7 @@
#include <target_core_base.h>
#include <target_core_device.h>
#include <target_core_hba.h>
+#include <target_core_tmr.h>
#include <target_core_transport.h>
#include <target_core_pr.h>
#include <target_core_ua.h>
@@ -368,12 +369,14 @@ static int core_scsi3_pr_seq_non_holder(
* as we expect registered non-reservation holding
* nexuses to issue CDBs.
*/
+#if 0
if (!(registered_nexus)) {
printk(KERN_INFO "Allowing implict CDB: 0x%02x"
" for %s reservation on unregistered"
" nexus\n", cdb[0],
core_scsi3_pr_dump_type(pr_reg_type));
}
+#endif
return 0;
}
} else if (all_reg) {
@@ -431,6 +434,7 @@ static int core_scsi3_pr_reservation_check(
return 0;
}
*pr_reg_type = dev->dev_pr_res_holder->pr_res_type;
+ cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key;
ret = (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) ?
-1 : 0;
spin_unlock(&dev->dev_reservation_lock);
@@ -473,6 +477,7 @@ static int core_scsi3_alloc_registration(
}
INIT_LIST_HEAD(&pr_reg->pr_reg_list);
+ INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list);
atomic_set(&pr_reg->pr_res_holders, 0);
pr_reg->pr_reg_nacl = nacl;
pr_reg->pr_reg_deve = deve;
@@ -490,6 +495,7 @@ static int core_scsi3_alloc_registration(
spin_lock(&pr_tmpl->registration_lock);
list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list);
deve->deve_flags |= DEF_PR_REGISTERED;
+ deve->pr_res_key = sa_res_key;
printk(KERN_INFO "SPC-3 PR [%s] Service Action: REGISTER%s Initiator"
" Node: %s\n", tfo->get_fabric_name(), (ignore_key) ?
@@ -573,6 +579,7 @@ static int core_scsi3_check_implict_release(
static void __core_scsi3_free_registration(
se_device_t *dev,
t10_pr_registration_t *pr_reg,
+ struct list_head *preempt_and_abort_list,
int dec_holders)
{
struct target_core_fabric_ops *tfo =
@@ -580,6 +587,7 @@ static void __core_scsi3_free_registration(
t10_reservation_template_t *pr_tmpl = &SU_DEV(dev)->t10_reservation;
pr_reg->pr_reg_deve->deve_flags &= ~DEF_PR_REGISTERED;
+ pr_reg->pr_reg_deve->pr_res_key = 0;
list_del(&pr_reg->pr_reg_list);
/*
* Caller accessing *pr_reg using core_scsi3_locate_pr_reg(),
@@ -612,9 +620,17 @@ static void __core_scsi3_free_registration(
" 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key,
pr_reg->pr_res_generation);
- pr_reg->pr_reg_deve = NULL;
- pr_reg->pr_reg_nacl = NULL;
- kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ if (!(preempt_and_abort_list)) {
+ pr_reg->pr_reg_deve = NULL;
+ pr_reg->pr_reg_nacl = NULL;
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ return;
+ }
+ /*
+ * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list
+ * are released once the ABORT_TASK_SET has completed..
+ */
+ list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list);
}
void core_scsi3_free_pr_reg_from_nacl(
@@ -643,7 +659,7 @@ void core_scsi3_free_pr_reg_from_nacl(
if (pr_reg->pr_reg_nacl != nacl)
continue;
- __core_scsi3_free_registration(dev, pr_reg, 0);
+ __core_scsi3_free_registration(dev, pr_reg, NULL, 0);
}
spin_unlock(&pr_tmpl->registration_lock);
}
@@ -667,7 +683,7 @@ void core_scsi3_free_all_registrations(
list_for_each_entry_safe(pr_reg, pr_reg_tmp,
&pr_tmpl->registration_list, pr_reg_list) {
- __core_scsi3_free_registration(dev, pr_reg, 0);
+ __core_scsi3_free_registration(dev, pr_reg, NULL, 0);
}
spin_unlock(&pr_tmpl->registration_lock);
}
@@ -785,7 +801,8 @@ static int core_scsi3_emulate_pro_register(
/*
* Release the calling I_T Nexus registration now..
*/
- __core_scsi3_free_registration(SE_DEV(cmd), pr_reg, 1);
+ __core_scsi3_free_registration(SE_DEV(cmd), pr_reg,
+ NULL, 1);
/*
* From spc4r17, section 5.7.11.3 Unregistering
*
@@ -1285,7 +1302,8 @@ static int core_scsi3_emulate_pro_clear(
calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
pr_reg_nacl = pr_reg->pr_reg_nacl;
pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
- __core_scsi3_free_registration(dev, pr_reg, calling_it_nexus);
+ __core_scsi3_free_registration(dev, pr_reg, NULL,
+ calling_it_nexus);
/*
* e) Establish a unit attention condition for the initiator
* port associated with every registered I_T nexus other
@@ -1312,8 +1330,10 @@ static int core_scsi3_emulate_pro_clear(
static void __core_scsi3_complete_pro_preempt(
se_device_t *dev,
t10_pr_registration_t *pr_reg,
+ struct list_head *preempt_and_abort_list,
int type,
- int scope)
+ int scope,
+ int abort)
{
se_node_acl_t *nacl = pr_reg->pr_reg_nacl;
struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
@@ -1329,12 +1349,60 @@ static void __core_scsi3_complete_pro_preempt(
pr_reg->pr_res_type = type;
pr_reg->pr_res_scope = scope;
- printk(KERN_INFO "SPC-3 PR [%s] Service Action: PREEMPT created new"
+ printk(KERN_INFO "SPC-3 PR [%s] Service Action: PREEMPT%s created new"
" reservation holder TYPE: %s ALL_TG_PT: %d\n",
- tfo->get_fabric_name(), core_scsi3_pr_dump_type(type),
+ tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "",
+ core_scsi3_pr_dump_type(type),
(pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
- printk(KERN_INFO "SPC-3 PR [%s] PREEMPT from Node: %s\n",
- tfo->get_fabric_name(), nacl->initiatorname);
+ printk(KERN_INFO "SPC-3 PR [%s] PREEMPT%s from Node: %s\n",
+ tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "",
+ nacl->initiatorname);
+ /*
+ * For PREEMPT_AND_ABORT, add the preempting reservation's
+ * t10_pr_registration_t to the list that will be compared
+ * against received CDBs..
+ */
+ if (preempt_and_abort_list)
+ list_add_tail(&pr_reg->pr_reg_abort_list,
+ preempt_and_abort_list);
+}
+
+static void core_scsi3_release_preempt_and_abort(
+ struct list_head *preempt_and_abort_list,
+ t10_pr_registration_t *pr_reg_holder)
+{
+ t10_pr_registration_t *pr_reg, *pr_reg_tmp;
+
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list,
+ pr_reg_abort_list) {
+
+ list_del(&pr_reg->pr_reg_abort_list);
+ if (pr_reg_holder == pr_reg)
+ continue;
+ if (pr_reg->pr_res_holder) {
+ printk(KERN_WARNING "pr_reg->pr_res_holder still set\n");
+ continue;
+ }
+
+ pr_reg->pr_reg_deve = NULL;
+ pr_reg->pr_reg_nacl = NULL;
+ kmem_cache_free(t10_pr_reg_cache, pr_reg);
+ }
+}
+
+int core_scsi3_check_cdb_abort_and_preempt(
+ struct list_head *preempt_and_abort_list,
+ se_cmd_t *cmd)
+{
+ t10_pr_registration_t *pr_reg, *pr_reg_tmp;
+
+ list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list,
+ pr_reg_abort_list) {
+ if (pr_reg->pr_res_key == cmd->pr_res_key)
+ return 0;
+ }
+
+ return 1;
}
static int core_scsi3_emulate_pro_preempt(
@@ -1342,13 +1410,15 @@ static int core_scsi3_emulate_pro_preempt(
int type,
int scope,
u64 res_key,
- u64 sa_res_key)
+ u64 sa_res_key,
+ int abort)
{
se_device_t *dev = SE_DEV(cmd);
se_dev_entry_t *se_deve;
se_lun_t *se_lun = SE_LUN(cmd);
se_node_acl_t *pr_reg_nacl;
se_session_t *se_sess = SE_SESS(cmd);
+ struct list_head preempt_and_abort_list;
t10_pr_registration_t *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder;
t10_reservation_template_t *pr_tmpl = &SU_DEV(dev)->t10_reservation;
u32 pr_res_mapped_lun = 0;
@@ -1365,7 +1435,8 @@ static int core_scsi3_emulate_pro_preempt(
pr_reg_n = core_scsi3_locate_pr_reg(SE_DEV(cmd), se_sess->se_node_acl);
if (!(pr_reg_n)) {
printk(KERN_ERR "SPC-3 PR: Unable to locate"
- " PR_REGISTERED *pr_reg for PREEMPT\n");
+ " PR_REGISTERED *pr_reg for PREEMPT%s\n",
+ (abort) ? "_AND_ABORT" : "");
return PYX_TRANSPORT_RESERVATION_CONFLICT;
}
if (pr_reg_n->pr_res_key != res_key) {
@@ -1377,6 +1448,7 @@ static int core_scsi3_emulate_pro_preempt(
core_scsi3_put_pr_reg(pr_reg_n);
return PYX_TRANSPORT_INVALID_PARAMETER_LIST;
}
+ INIT_LIST_HEAD(&preempt_and_abort_list);
spin_lock(&dev->dev_reservation_lock);
pr_res_holder = dev->dev_pr_res_holder;
@@ -1434,7 +1506,8 @@ static int core_scsi3_emulate_pro_preempt(
pr_reg_nacl = pr_reg->pr_reg_nacl;
pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
__core_scsi3_free_registration(dev, pr_reg,
- calling_it_nexus);
+ (abort) ? &preempt_and_abort_list :
+ NULL, calling_it_nexus);
released_regs++;
} else {
/*
@@ -1460,7 +1533,9 @@ static int core_scsi3_emulate_pro_preempt(
pr_reg_nacl = pr_reg->pr_reg_nacl;
pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
- __core_scsi3_free_registration(dev, pr_reg, 0);
+ __core_scsi3_free_registration(dev, pr_reg,
+ (abort) ? &preempt_and_abort_list :
+ NULL, 0);
released_regs++;
}
if (!(calling_it_nexus))
@@ -1486,9 +1561,15 @@ static int core_scsi3_emulate_pro_preempt(
* with a zero SA rservation key, preempt the existing
* reservation with the new PR type and scope.
*/
- if (pr_res_holder && all_reg && !(sa_res_key))
+ if (pr_res_holder && all_reg && !(sa_res_key)) {
__core_scsi3_complete_pro_preempt(dev, pr_reg_n,
- type, scope);
+ (abort) ? &preempt_and_abort_list : NULL,
+ type, scope, abort);
+
+ if (abort)
+ core_scsi3_release_preempt_and_abort(
+ &preempt_and_abort_list, pr_reg_n);
+ }
spin_unlock(&dev->dev_reservation_lock);
core_scsi3_put_pr_reg(pr_reg_n);
@@ -1499,32 +1580,21 @@ static int core_scsi3_emulate_pro_preempt(
* The PREEMPTing SA reservation key matches that of the
* existing persistent reservation, first, we check if
* we are preempting our own reservation.
+ * From spc4r17, section 5.7.11.4.3 Preempting
+ * persistent reservations and registration handling
+ *
+ * If an all registrants persistent reservation is not
+ * present, it is not an error for the persistent
+ * reservation holder to preempt itself (i.e., a
+ * PERSISTENT RESERVE OUT with a PREEMPT service action
+ * or a PREEMPT AND ABORT service action with the
+ * SERVICE ACTION RESERVATION KEY value equal to the
+ * persistent reservation holder's reservation key that
+ * is received from the persistent reservation holder).
+ * In that case, the device server shall establish the
+ * new persistent reservation and maintain the
+ * registration.
*/
- if (pr_reg_n == pr_res_holder) {
- /*
- * From spc4r17, section 5.7.11.4.3 Preempting
- * persistent reservations and registration handling
- *
- * If an all registrants persistent reservation is not
- * present, it is not an error for the persistent
- * reservation holder to preempt itself (i.e., a
- * PERSISTENT RESERVE OUT with a PREEMPT service action
- * or a PREEMPT AND ABORT service action with the
- * SERVICE ACTION RESERVATION KEY value equal to the
- * persistent reservation holder's reservation key that
- * is received from the persistent reservation holder).
- * In that case, the device server shall establish the
- * new persistent reservation and maintain the
- * registration.
- */
- __core_scsi3_complete_pro_preempt(dev, pr_reg_n,
- type, scope);
- spin_unlock(&dev->dev_reservation_lock);
-
- core_scsi3_put_pr_reg(pr_reg_n);
- core_scsi3_pr_generation(SE_DEV(cmd));
- return 0;
- }
prh_type = pr_res_holder->pr_res_type;
prh_scope = pr_res_holder->pr_res_scope;
/*
@@ -1536,7 +1606,9 @@ static int core_scsi3_emulate_pro_preempt(
* a) Release the persistent reservation for the holder
* identified by the SERVICE ACTION RESERVATION KEY field;
*/
- __core_scsi3_complete_pro_release(dev, pr_res_holder->pr_reg_nacl,
+ if (pr_reg_n != pr_res_holder)
+ __core_scsi3_complete_pro_release(dev,
+ pr_res_holder->pr_reg_nacl,
dev->dev_pr_res_holder, 0);
/*
* b) Remove the registrations for all I_T nexuses identified
@@ -1562,6 +1634,7 @@ static int core_scsi3_emulate_pro_preempt(
pr_reg_nacl = pr_reg->pr_reg_nacl;
pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
__core_scsi3_free_registration(dev, pr_reg,
+ (abort) ? &preempt_and_abort_list : NULL,
calling_it_nexus);
/*
* e) Establish a unit attention condition for the initiator
@@ -1577,7 +1650,9 @@ static int core_scsi3_emulate_pro_preempt(
* c) Establish a persistent reservation for the preempting
* I_T nexus using the contents of the SCOPE and TYPE fields;
*/
- __core_scsi3_complete_pro_preempt(dev, pr_reg_n, type, scope);
+ __core_scsi3_complete_pro_preempt(dev, pr_reg_n,
+ (abort) ? &preempt_and_abort_list : NULL,
+ type, scope, abort);
/*
* d) Process tasks as defined in 5.7.1;
* e) See above..
@@ -1594,7 +1669,7 @@ static int core_scsi3_emulate_pro_preempt(
if ((prh_type != type) || (prh_scope != scope)) {
spin_lock(&pr_tmpl->registration_lock);
list_for_each_entry_safe(pr_reg, pr_reg_tmp,
- &pr_tmpl->registration_list, pr_reg_list) {
+ &pr_tmpl->registration_list, pr_reg_list) {
calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
if (calling_it_nexus)
@@ -1607,23 +1682,27 @@ static int core_scsi3_emulate_pro_preempt(
spin_unlock(&pr_tmpl->registration_lock);
}
spin_unlock(&dev->dev_reservation_lock);
+ /*
+ * Call LUN_RESET logic upon list of t10_pr_registration_t,
+ * All received CDBs for the matching existing reservation and
+ * registrations undergo ABORT_TASK logic.
+ *
+ * From there, core_scsi3_release_preempt_and_abort() will
+ * release every registration in the list (which have already
+ * been removed from the primary pr_reg list), except the
+ * new persistent reservation holder, the calling Initiator Port.
+ */
+ if (abort) {
+ core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd);
+ core_scsi3_release_preempt_and_abort(&preempt_and_abort_list,
+ pr_reg_n);
+ }
core_scsi3_put_pr_reg(pr_reg_n);
core_scsi3_pr_generation(SE_DEV(cmd));
return 0;
}
-static int core_scsi3_emulate_pro_preempt_and_abort(
- se_cmd_t *cmd,
- int type,
- int scope,
- u64 res_key,
- u64 sa_res_key)
-{
- core_scsi3_pr_generation(SE_DEV(cmd));
- return 0;
-}
-
static int core_scsi3_emulate_pro_register_and_move(
se_cmd_t *cmd,
int type,
@@ -1699,12 +1778,10 @@ static int core_scsi3_emulate_pr_out(se_cmd_t *cmd, unsigned char *cdb)
return core_scsi3_emulate_pro_clear(cmd, res_key);
case PRO_PREEMPT:
return core_scsi3_emulate_pro_preempt(cmd, type, scope,
- res_key, sa_res_key);
-#if 0
+ res_key, sa_res_key, 0);
case PRO_PREEMPT_AND_ABORT:
- return core_scsi3_emulate_pro_preempt_and_abort(cmd,
- type, scope, res_key, sa_res_key);
-#endif
+ return core_scsi3_emulate_pro_preempt(cmd, type, scope,
+ res_key, sa_res_key, 1);
case PRO_REGISTER_AND_IGNORE_EXISTING_KEY:
return core_scsi3_emulate_pro_register(cmd,
0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1);
diff --git a/drivers/lio-core/target_core_pr.h b/drivers/lio-core/target_core_pr.h
index 9003ebb..23d9e18 100644
--- a/drivers/lio-core/target_core_pr.h
+++ b/drivers/lio-core/target_core_pr.h
@@ -46,6 +46,8 @@ extern void core_scsi3_free_pr_reg_from_nacl(struct se_device_s *,
struct se_node_acl_s *);
extern void core_scsi3_free_all_registrations(struct se_device_s *);
extern unsigned char *core_scsi3_pr_dump_type(int);
+extern int core_scsi3_check_cdb_abort_and_preempt(struct list_head *,
+ struct se_cmd_s *);
extern int core_scsi3_emulate_pr(struct se_cmd_s *);
extern int core_setup_reservations(struct se_device_s *);
diff --git a/drivers/lio-core/target_core_tmr.c b/drivers/lio-core/target_core_tmr.c
index 531b135..577dc6a 100644
--- a/drivers/lio-core/target_core_tmr.c
+++ b/drivers/lio-core/target_core_tmr.c
@@ -29,12 +29,14 @@
#include <linux/version.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/list.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <target_core_base.h>
#include <target_core_device.h>
#include <target_core_hba.h>
+#include <target_core_pr.h>
#include <target_core_seobj.h>
#include <target_core_tmr.h>
#include <target_core_transport.h>
@@ -93,16 +95,21 @@ void core_tmr_release_req(
spin_unlock(&dev->se_tmr_lock);
}
-int core_tmr_lun_reset(se_device_t *dev, se_tmr_req_t *tmr)
+int core_tmr_lun_reset(
+ se_device_t *dev,
+ se_tmr_req_t *tmr,
+ struct list_head *preempt_and_abort_list,
+ se_cmd_t *prout_cmd)
{
se_cmd_t *cmd;
- se_queue_req_t *qr;
+ se_queue_req_t *qr, *qr_tmp;
se_node_acl_t *tmr_nacl = NULL;
se_portal_group_t *tmr_tpg = NULL;
+ se_queue_obj_t *qobj = dev->dev_queue_obj;
se_tmr_req_t *tmr_p, *tmr_pp;
- se_task_t *task;
+ se_task_t *task, *task_tmp;
unsigned long flags;
- int state, tas;
+ int fe_count, state, tas;
/*
* TASK_ABORTED status bit, this is configurable via ConfigFS
* se_device_t attributes. spc4r17 section 7.4.6 Control mode page
@@ -119,7 +126,7 @@ int core_tmr_lun_reset(se_device_t *dev, se_tmr_req_t *tmr)
* Determine if this se_tmr is coming from a $FABRIC_MOD
* or se_device_t passthrough..
*/
- if (tmr->task_cmd && tmr->task_cmd->se_sess) {
+ if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) {
tmr_nacl = tmr->task_cmd->se_sess->se_node_acl;
tmr_tpg = tmr->task_cmd->se_sess->se_tpg;
if (tmr_nacl && tmr_tpg) {
@@ -129,8 +136,9 @@ int core_tmr_lun_reset(se_device_t *dev, se_tmr_req_t *tmr)
tmr_nacl->initiatorname);
}
}
- DEBUG_LR("LUN_RESET: TMR: %p starting for [%s], tas: %d\n", tmr,
- TRANSPORT(dev)->name, tas);
+ DEBUG_LR("LUN_RESET: %s starting for [%s], tas: %d\n",
+ (preempt_and_abort_list) ? "Preempt" : "TMR",
+ TRANSPORT(dev)->name, tas);
/*
* Release all pending and outgoing TMRs aside from the received
* LUN_RESET tmr..
@@ -148,10 +156,20 @@ int core_tmr_lun_reset(se_device_t *dev, se_tmr_req_t *tmr)
printk(KERN_ERR "Unable to locate se_cmd_t for TMR\n");
continue;
}
+ /*
+ * If this function was called with a valid pr_res_key
+ * parameter (eg: for PROUT PREEMPT_AND_ABORT service action
+ * skip non regisration key matching TMRs.
+ */
+ if ((preempt_and_abort_list != NULL) &&
+ (core_scsi3_check_cdb_abort_and_preempt(
+ preempt_and_abort_list, cmd) != 0))
+ continue;
spin_unlock(&dev->se_tmr_lock);
- DEBUG_LR("LUN_RESET: Releasing TMR %p Function: 0x%02x,"
- " Response: 0x%02x, t_state: %d\n", tmr_p,
+ DEBUG_LR("LUN_RESET: %s releasing TMR %p Function: 0x%02x,"
+ " Response: 0x%02x, t_state: %d\n",
+ (preempt_and_abort_list) ? "Preempt" : "", tmr_p,
tmr_p->function, tmr_p->response, cmd->t_state);
transport_cmd_finish_abort_tmr(cmd);
@@ -180,7 +198,8 @@ int core_tmr_lun_reset(se_device_t *dev, se_tmr_req_t *tmr)
* in the Control Mode Page.
*/
spin_lock_irqsave(&dev->execute_task_lock, flags);
- while ((task = transport_get_task_from_state_list(dev))) {
+ list_for_each_entry_safe(task, task_tmp, &dev->state_task_list,
+ t_state_list) {
if (!(TASK_CMD(task))) {
printk(KERN_ERR "TASK_CMD(task) is NULL!\n");
continue;
@@ -193,19 +212,36 @@ int core_tmr_lun_reset(se_device_t *dev, se_tmr_req_t *tmr)
CMD_TFO(cmd)->get_task_tag(cmd));
continue;
}
+ /*
+ * For PREEMPT_AND_ABORT usage, only process commands
+ * with a matching reservation key.
+ */
+ if ((preempt_and_abort_list != NULL) &&
+ (core_scsi3_check_cdb_abort_and_preempt(
+ preempt_and_abort_list, cmd) != 0))
+ continue;
+ /*
+ * Not aborting PROUT PREEMPT_AND_ABORT CDB..
+ */
+ if (prout_cmd == cmd)
+ continue;
+
+ list_del(&task->t_state_list);
+ atomic_set(&task->task_state_active, 0);
spin_unlock_irqrestore(&dev->execute_task_lock, flags);
spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
- DEBUG_LR("LUN_RESET: cmd: %p task: %p ITT/CmdSN: 0x%08x/0x%08x"
- ", i_state: %d, t_state/def_t_state: %d/%d cdb:"
- " 0x%02x\n", cmd, task, CMD_TFO(cmd)->get_task_tag(cmd),
+ DEBUG_LR("LUN_RESET: %s cmd: %p task: %p ITT/CmdSN: 0x%08x/"
+ "0x%08x, i_state: %d, t_state/def_t_state: %d/%d cdb:"
+ " 0x%02x\n", (preempt_and_abort_list) ? "Preempt" : "",
+ cmd, task, CMD_TFO(cmd)->get_task_tag(cmd),
0, CMD_TFO(cmd)->get_cmd_state(cmd), cmd->t_state,
cmd->deferred_t_state, T_TASK(cmd)->t_task_cdb[0]);
- DEBUG_LR("LUN_RESET: ITT[0x%08x] - t_task_cdbs: %d"
- " t_task_cdbs_left: %d t_task_cdbs_sent: %d --"
- " t_transport_active: %d t_transport_stop: %d"
- " t_transport_sent: %d\n",
- CMD_TFO(cmd)->get_task_tag(cmd),
+ DEBUG_LR("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx"
+ " t_task_cdbs: %d t_task_cdbs_left: %d"
+ " t_task_cdbs_sent: %d -- t_transport_active: %d"
+ " t_transport_stop: %d t_transport_sent: %d\n",
+ CMD_TFO(cmd)->get_task_tag(cmd), cmd->pr_res_key,
T_TASK(cmd)->t_task_cdbs,
atomic_read(&T_TASK(cmd)->t_task_cdbs_left),
atomic_read(&T_TASK(cmd)->t_task_cdbs_sent),
@@ -241,49 +277,44 @@ int core_tmr_lun_reset(se_device_t *dev, se_tmr_req_t *tmr)
spin_lock_irqsave(&dev->execute_task_lock, flags);
continue;
}
+ fe_count = atomic_read(&T_TASK(cmd)->t_fe_count);
if (atomic_read(&T_TASK(cmd)->t_transport_active)) {
DEBUG_LR("LUN_RESET: got t_transport_active = 1 for"
- " task: %p, dev: %p\n", task, dev);
-
- if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
- spin_unlock_irqrestore(
- &T_TASK(cmd)->t_state_lock, flags);
+ " task: %p, t_fe_count: %d dev: %p\n", task,
+ fe_count, dev);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
+ flags);
+ if (fe_count) {
/*
* TASK ABORTED status (TAS) bit support
*/
- if ((tmr_nacl == cmd->se_sess->se_node_acl) ||
+ if (((tmr_nacl != NULL) &&
+ (tmr_nacl == cmd->se_sess->se_node_acl)) ||
tas)
transport_send_task_abort(cmd);
transport_cmd_finish_abort(cmd, 0);
- } else {
- spin_unlock_irqrestore(
- &T_TASK(cmd)->t_state_lock, flags);
-
+ } else
transport_cmd_finish_abort(cmd, 1);
- }
spin_lock_irqsave(&dev->execute_task_lock, flags);
continue;
}
DEBUG_LR("LUN_RESET: Got t_transport_active = 0 for task: %p,"
- " dev: %p\n", task, dev);
+ " t_fe_count: %d dev: %p\n", task, fe_count, dev);
+ spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
- if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
- spin_unlock_irqrestore(
- &T_TASK(cmd)->t_state_lock, flags);
+ if (fe_count) {
/*
* TASK ABORTED status (TAS) bit support
*/
- if ((tmr_nacl == cmd->se_sess->se_node_acl) || tas)
+ if (((tmr_nacl != NULL) &&
+ (tmr_nacl == cmd->se_sess->se_node_acl)) || tas)
transport_send_task_abort(cmd);
transport_cmd_finish_abort(cmd, 0);
- } else {
- spin_unlock_irqrestore(
- &T_TASK(cmd)->t_state_lock, flags);
-
+ } else
transport_cmd_finish_abort(cmd, 1);
- }
+
spin_lock_irqsave(&dev->execute_task_lock, flags);
}
spin_unlock_irqrestore(&dev->execute_task_lock, flags);
@@ -295,35 +326,70 @@ int core_tmr_lun_reset(se_device_t *dev, se_tmr_req_t *tmr)
* TASK_ABORTED status, if there is an outstanding $FABRIC_MOD
* reference, otherwise the se_cmd_t is released.
*/
- spin_lock_irqsave(&dev->dev_queue_obj->cmd_queue_lock, flags);
- while ((qr = __transport_get_qr_from_queue(dev->dev_queue_obj))) {
- spin_unlock_irqrestore(
- &dev->dev_queue_obj->cmd_queue_lock, flags);
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
+ list_for_each_entry_safe(qr, qr_tmp, &qobj->qobj_list, qr_list) {
cmd = (se_cmd_t *)qr->cmd;
+ if (!(cmd)) {
+ /*
+ * Skip these for non PREEMPT_AND_ABORT usage..
+ */
+ if (preempt_and_abort_list != NULL)
+ continue;
+
+ atomic_dec(&qobj->queue_cnt);
+ list_del(&qr->qr_list);
+ kfree(qr);
+ continue;
+ }
+ /*
+ * For PREEMPT_AND_ABORT usage, only process commands
+ * with a matching reservation key.
+ */
+ if ((preempt_and_abort_list != NULL) &&
+ (core_scsi3_check_cdb_abort_and_preempt(
+ preempt_and_abort_list, cmd) != 0))
+ continue;
+ /*
+ * Not aborting PROUT PREEMPT_AND_ABORT CDB..
+ */
+ if (prout_cmd == cmd)
+ continue;
+
+ atomic_dec(&T_TASK(cmd)->t_transport_queue_active);
+ atomic_dec(&qobj->queue_cnt);
+ list_del(&qr->qr_list);
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
+
state = qr->state;
kfree(qr);
- DEBUG_LR("LUN_RESET: From Device Queue: cmd: %p t_state: %d\n",
- cmd, state);
+ DEBUG_LR("LUN_RESET: %s from Device Queue: cmd: %p t_state:"
+ " %d t_fe_count: %d\n", (preempt_and_abort_list) ?
+ "Preempt" : "", cmd, state,
+ atomic_read(&T_TASK(cmd)->t_fe_count));
if (atomic_read(&T_TASK(cmd)->t_fe_count)) {
/*
* TASK ABORTED status (TAS) bit support
*/
- if ((tmr_nacl == cmd->se_sess->se_node_acl) || tas)
+ if (((tmr_nacl != NULL) &&
+ (tmr_nacl == cmd->se_sess->se_node_acl)) ||
+ tas)
transport_send_task_abort(cmd);
transport_cmd_finish_abort(cmd, 0);
} else
transport_cmd_finish_abort(cmd, 1);
- spin_lock_irqsave(&dev->dev_queue_obj->cmd_queue_lock, flags);
+ spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
}
- spin_unlock_irqrestore(&dev->dev_queue_obj->cmd_queue_lock, flags);
+ spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
spin_lock(&dev->stats_lock);
dev->num_resets++;
spin_unlock(&dev->stats_lock);
- DEBUG_LR("LUN_RESET: TMR for [%s] Complete\n", TRANSPORT(dev)->name);
+ DEBUG_LR("LUN_RESET: %s for [%s] Complete\n",
+ (preempt_and_abort_list) ? "Preempt" : "TMR",
+ TRANSPORT(dev)->name);
return 0;
}
diff --git a/drivers/lio-core/target_core_tmr.h b/drivers/lio-core/target_core_tmr.h
index 3786f1b..c649b92 100644
--- a/drivers/lio-core/target_core_tmr.h
+++ b/drivers/lio-core/target_core_tmr.h
@@ -37,6 +37,7 @@ extern struct kmem_cache *se_tmr_req_cache;
extern struct se_tmr_req_s *core_tmr_alloc_req(struct se_cmd_s *, void *, u8);
extern void core_tmr_release_req(struct se_tmr_req_s *);
-extern int core_tmr_lun_reset(struct se_device_s *, struct se_tmr_req_s *);
+extern int core_tmr_lun_reset(struct se_device_s *, struct se_tmr_req_s *,
+ struct list_head *, struct se_cmd_s *);
#endif /* TARGET_CORE_TMR_H */
diff --git a/drivers/lio-core/target_core_transport.c b/drivers/lio-core/target_core_transport.c
index 4c4a489..4132da1 100644
--- a/drivers/lio-core/target_core_transport.c
+++ b/drivers/lio-core/target_core_transport.c
@@ -7357,7 +7357,11 @@ EXPORT_SYMBOL(transport_send_check_condition_and_sense);
void transport_send_task_abort(se_cmd_t *cmd)
{
cmd->scsi_status = SAM_STAT_TASK_ABORTED;
-
+#if 0
+ printk(KERN_INFO "Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x,"
+ " ITT: 0x%08x\n", T_TASK(cmd)->t_task_cdb[0],
+ CMD_TFO(cmd)->get_task_tag(cmd));
+#endif
if (!(cmd->se_cmd_flags & SCF_CMD_PASSTHROUGH))
CMD_TFO(cmd)->queue_status(cmd);
}
@@ -7384,7 +7388,7 @@ int transport_generic_do_tmr(se_cmd_t *cmd)
tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
break;
case LUN_RESET:
- ret = core_tmr_lun_reset(dev, tmr);
+ ret = core_tmr_lun_reset(dev, tmr, NULL, NULL);
tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE :
TMR_FUNCTION_REJECTED;
break;
--
1.5.4.1
--
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