#include <target/target_core_base.h>
#include <target/target_core_backend.h>
#include <target/target_core_fabric.h>
-#include <target/target_core_configfs.h>
#include "target_core_internal.h"
#include "target_core_pr.h"
* Used for Specify Initiator Ports Capable Bit (SPEC_I_PT)
*/
struct pr_transport_id_holder {
- int dest_local_nexus;
struct t10_pr_registration *dest_pr_reg;
struct se_portal_group *dest_tpg;
struct se_node_acl *dest_node_acl;
static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *,
struct t10_pr_registration *, int, int);
+static int is_reservation_holder(
+ struct t10_pr_registration *pr_res_holder,
+ struct t10_pr_registration *pr_reg)
+{
+ int pr_res_type;
+
+ if (pr_res_holder) {
+ pr_res_type = pr_res_holder->pr_res_type;
+
+ return pr_res_holder == pr_reg ||
+ pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG ||
+ pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG;
+ }
+ return 0;
+}
+
static sense_reason_t
target_scsi2_reservation_check(struct se_cmd *cmd)
{
tpg = sess->se_tpg;
pr_debug("SCSI-2 Released reservation for %s LUN: %u ->"
" MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
- cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
+ cmd->se_lun->unpacked_lun, cmd->orig_fe_lun,
sess->se_node_acl->initiatorname);
out_unlock:
dev->dev_reserved_node_acl->initiatorname);
pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u"
" from %s \n", cmd->se_lun->unpacked_lun,
- cmd->se_deve->mapped_lun,
+ cmd->orig_fe_lun,
sess->se_node_acl->initiatorname);
ret = TCM_RESERVATION_CONFLICT;
goto out_unlock;
}
pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u"
" for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
- cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
+ cmd->se_lun->unpacked_lun, cmd->orig_fe_lun,
sess->se_node_acl->initiatorname);
out_unlock:
* This function is called by those initiator ports who are *NOT*
* the active PR reservation holder when a reservation is present.
*/
-static int core_scsi3_pr_seq_non_holder(
- struct se_cmd *cmd,
- u32 pr_reg_type)
+static int core_scsi3_pr_seq_non_holder(struct se_cmd *cmd, u32 pr_reg_type,
+ bool isid_mismatch)
{
unsigned char *cdb = cmd->t_task_cdb;
- struct se_dev_entry *se_deve;
struct se_session *se_sess = cmd->se_sess;
- int other_cdb = 0, ignore_reg;
+ struct se_node_acl *nacl = se_sess->se_node_acl;
+ int other_cdb = 0;
int registered_nexus = 0, ret = 1; /* Conflict by default */
int all_reg = 0, reg_only = 0; /* ALL_REG, REG_ONLY */
int we = 0; /* Write Exclusive */
int legacy = 0; /* Act like a legacy device and return
* RESERVATION CONFLICT on some CDBs */
- se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
- /*
- * Determine if the registration should be ignored due to
- * non-matching ISIDs in target_scsi3_pr_reservation_check().
- */
- ignore_reg = (pr_reg_type & 0x80000000);
- if (ignore_reg)
- pr_reg_type &= ~0x80000000;
+ if (isid_mismatch) {
+ registered_nexus = 0;
+ } else {
+ struct se_dev_entry *se_deve;
+
+ rcu_read_lock();
+ se_deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun);
+ if (se_deve)
+ registered_nexus = test_bit(DEF_PR_REG_ACTIVE,
+ &se_deve->deve_flags);
+ rcu_read_unlock();
+ }
switch (pr_reg_type) {
case PR_TYPE_WRITE_EXCLUSIVE:
* Some commands are only allowed for the persistent reservation
* holder.
*/
- if ((se_deve->def_pr_registered) && !(ignore_reg))
- registered_nexus = 1;
break;
case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
we = 1;
* Some commands are only allowed for registered I_T Nexuses.
*/
reg_only = 1;
- if ((se_deve->def_pr_registered) && !(ignore_reg))
- registered_nexus = 1;
break;
case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
we = 1;
* Each registered I_T Nexus is a reservation holder.
*/
all_reg = 1;
- if ((se_deve->def_pr_registered) && !(ignore_reg))
- registered_nexus = 1;
break;
default:
return -EINVAL;
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
u32 pr_reg_type;
+ bool isid_mismatch = false;
if (!dev->dev_pr_res_holder)
return 0;
if (dev->dev_pr_res_holder->isid_present_at_reg) {
if (dev->dev_pr_res_holder->pr_reg_bin_isid !=
sess->sess_bin_isid) {
- pr_reg_type |= 0x80000000;
+ isid_mismatch = true;
goto check_nonholder;
}
}
return 0;
check_nonholder:
- if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type))
+ if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type, isid_mismatch))
return TCM_RESERVATION_CONFLICT;
return 0;
}
static struct t10_pr_registration *__core_scsi3_do_alloc_registration(
struct se_device *dev,
struct se_node_acl *nacl,
+ struct se_lun *lun,
struct se_dev_entry *deve,
+ u32 mapped_lun,
unsigned char *isid,
u64 sa_res_key,
int all_tg_pt,
atomic_set(&pr_reg->pr_res_holders, 0);
pr_reg->pr_reg_nacl = nacl;
pr_reg->pr_reg_deve = deve;
- pr_reg->pr_res_mapped_lun = deve->mapped_lun;
- pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun;
+ pr_reg->pr_res_mapped_lun = mapped_lun;
+ pr_reg->pr_aptpl_target_lun = lun->unpacked_lun;
+ pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi;
pr_reg->pr_res_key = sa_res_key;
pr_reg->pr_reg_all_tg_pt = all_tg_pt;
pr_reg->pr_reg_aptpl = aptpl;
- pr_reg->pr_reg_tg_pt_lun = deve->se_lun;
/*
* If an ISID value for this SCSI Initiator Port exists,
* save it to the registration now.
static struct t10_pr_registration *__core_scsi3_alloc_registration(
struct se_device *dev,
struct se_node_acl *nacl,
+ struct se_lun *lun,
struct se_dev_entry *deve,
+ u32 mapped_lun,
unsigned char *isid,
u64 sa_res_key,
int all_tg_pt,
{
struct se_dev_entry *deve_tmp;
struct se_node_acl *nacl_tmp;
- struct se_port *port, *port_tmp;
- struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
+ struct se_lun_acl *lacl_tmp;
+ struct se_lun *lun_tmp, *next, *dest_lun;
+ const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe;
int ret;
/*
* Create a registration for the I_T Nexus upon which the
* PROUT REGISTER was received.
*/
- pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid,
- sa_res_key, all_tg_pt, aptpl);
+ pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, lun, deve, mapped_lun,
+ isid, sa_res_key, all_tg_pt,
+ aptpl);
if (!pr_reg)
return NULL;
/*
* for ALL_TG_PT=1
*/
spin_lock(&dev->se_port_lock);
- list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) {
- atomic_inc_mb(&port->sep_tg_pt_ref_cnt);
+ list_for_each_entry_safe(lun_tmp, next, &dev->dev_sep_list, lun_dev_link) {
+ atomic_inc_mb(&lun_tmp->lun_active);
spin_unlock(&dev->se_port_lock);
- spin_lock_bh(&port->sep_alua_lock);
- list_for_each_entry(deve_tmp, &port->sep_alua_list,
- alua_port_list) {
+ spin_lock_bh(&lun_tmp->lun_deve_lock);
+ list_for_each_entry(deve_tmp, &lun_tmp->lun_deve_list, lun_link) {
/*
* This pointer will be NULL for demo mode MappedLUNs
* that have not been make explicit via a ConfigFS
if (!deve_tmp->se_lun_acl)
continue;
- nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl;
+ lacl_tmp = rcu_dereference_check(deve_tmp->se_lun_acl,
+ lockdep_is_held(&lun_tmp->lun_deve_lock));
+ nacl_tmp = lacl_tmp->se_lun_nacl;
/*
* Skip the matching struct se_node_acl that is allocated
* above..
if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname))
continue;
- atomic_inc_mb(&deve_tmp->pr_ref_count);
- spin_unlock_bh(&port->sep_alua_lock);
+ kref_get(&deve_tmp->pr_kref);
+ spin_unlock_bh(&lun_tmp->lun_deve_lock);
/*
* Grab a configfs group dependency that is released
* for the exception path at label out: below, or upon
if (ret < 0) {
pr_err("core_scsi3_lunacl_depend"
"_item() failed\n");
- atomic_dec_mb(&port->sep_tg_pt_ref_cnt);
- atomic_dec_mb(&deve_tmp->pr_ref_count);
+ atomic_dec_mb(&lun->lun_active);
+ kref_put(&deve_tmp->pr_kref, target_pr_kref_release);
goto out;
}
/*
* the original *pr_reg is processed in
* __core_scsi3_add_registration()
*/
+ dest_lun = rcu_dereference_check(deve_tmp->se_lun,
+ atomic_read(&deve_tmp->pr_kref.refcount) != 0);
+
pr_reg_atp = __core_scsi3_do_alloc_registration(dev,
- nacl_tmp, deve_tmp, NULL,
+ nacl_tmp, dest_lun, deve_tmp,
+ deve_tmp->mapped_lun, NULL,
sa_res_key, all_tg_pt, aptpl);
if (!pr_reg_atp) {
- atomic_dec_mb(&port->sep_tg_pt_ref_cnt);
- atomic_dec_mb(&deve_tmp->pr_ref_count);
+ atomic_dec_mb(&lun_tmp->lun_active);
core_scsi3_lunacl_undepend_item(deve_tmp);
goto out;
}
list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list,
&pr_reg->pr_reg_atp_list);
- spin_lock_bh(&port->sep_alua_lock);
+ spin_lock_bh(&lun_tmp->lun_deve_lock);
}
- spin_unlock_bh(&port->sep_alua_lock);
+ spin_unlock_bh(&lun_tmp->lun_deve_lock);
spin_lock(&dev->se_port_lock);
- atomic_dec_mb(&port->sep_tg_pt_ref_cnt);
+ atomic_dec_mb(&lun_tmp->lun_active);
}
spin_unlock(&dev->se_port_lock);
pr_reg->pr_res_key = sa_res_key;
pr_reg->pr_reg_all_tg_pt = all_tg_pt;
pr_reg->pr_reg_aptpl = 1;
- pr_reg->pr_reg_tg_pt_lun = NULL;
pr_reg->pr_res_scope = 0; /* Always LUN_SCOPE */
pr_reg->pr_res_type = type;
/*
struct se_lun *lun,
u32 target_lun,
struct se_node_acl *nacl,
- struct se_dev_entry *deve)
+ u32 mapped_lun)
{
struct t10_pr_registration *pr_reg, *pr_reg_tmp;
struct t10_reservation *pr_tmpl = &dev->t10_pr;
pr_reg_aptpl_list) {
if (!strcmp(pr_reg->pr_iport, i_port) &&
- (pr_reg->pr_res_mapped_lun == deve->mapped_lun) &&
+ (pr_reg->pr_res_mapped_lun == mapped_lun) &&
!(strcmp(pr_reg->pr_tport, t_port)) &&
(pr_reg->pr_reg_tpgt == tpgt) &&
(pr_reg->pr_aptpl_target_lun == target_lun)) {
pr_reg->pr_reg_nacl = nacl;
- pr_reg->pr_reg_deve = deve;
- pr_reg->pr_reg_tg_pt_lun = lun;
+ pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi;
list_del(&pr_reg->pr_reg_aptpl_list);
spin_unlock(&pr_tmpl->aptpl_reg_lock);
struct se_node_acl *nacl,
u32 mapped_lun)
{
- struct se_dev_entry *deve = nacl->device_list[mapped_lun];
-
if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
return 0;
return __core_scsi3_check_aptpl_registration(dev, tpg, lun,
- lun->unpacked_lun, nacl, deve);
+ lun->unpacked_lun, nacl,
+ mapped_lun);
}
static void __core_scsi3_dump_registration(
- struct target_core_fabric_ops *tfo,
+ const struct target_core_fabric_ops *tfo,
struct se_device *dev,
struct se_node_acl *nacl,
struct t10_pr_registration *pr_reg,
pr_reg->pr_reg_aptpl);
}
-/*
- * this function can be called with struct se_device->dev_reservation_lock
- * when register_move = 1
- */
static void __core_scsi3_add_registration(
struct se_device *dev,
struct se_node_acl *nacl,
enum register_type register_type,
int register_move)
{
- struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
+ const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe;
struct t10_reservation *pr_tmpl = &dev->t10_pr;
+ struct se_dev_entry *deve;
/*
* Increment PRgeneration counter for struct se_device upon a successful
spin_lock(&pr_tmpl->registration_lock);
list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list);
- pr_reg->pr_reg_deve->def_pr_registered = 1;
__core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type);
spin_unlock(&pr_tmpl->registration_lock);
+
+ rcu_read_lock();
+ deve = pr_reg->pr_reg_deve;
+ if (deve)
+ set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags);
+ rcu_read_unlock();
+
/*
* Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE.
*/
*/
list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe,
&pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) {
+ struct se_node_acl *nacl_tmp = pr_reg_tmp->pr_reg_nacl;
+
list_del(&pr_reg_tmp->pr_reg_atp_mem_list);
pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev);
spin_lock(&pr_tmpl->registration_lock);
list_add_tail(&pr_reg_tmp->pr_reg_list,
&pr_tmpl->registration_list);
- pr_reg_tmp->pr_reg_deve->def_pr_registered = 1;
- __core_scsi3_dump_registration(tfo, dev,
- pr_reg_tmp->pr_reg_nacl, pr_reg_tmp,
- register_type);
+ __core_scsi3_dump_registration(tfo, dev, nacl_tmp, pr_reg_tmp,
+ register_type);
spin_unlock(&pr_tmpl->registration_lock);
+
+ rcu_read_lock();
+ deve = pr_reg_tmp->pr_reg_deve;
+ if (deve)
+ set_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags);
+ rcu_read_unlock();
+
/*
* Drop configfs group dependency reference from
* __core_scsi3_alloc_registration()
static int core_scsi3_alloc_registration(
struct se_device *dev,
struct se_node_acl *nacl,
+ struct se_lun *lun,
struct se_dev_entry *deve,
+ u32 mapped_lun,
unsigned char *isid,
u64 sa_res_key,
int all_tg_pt,
{
struct t10_pr_registration *pr_reg;
- pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid,
- sa_res_key, all_tg_pt, aptpl);
+ pr_reg = __core_scsi3_alloc_registration(dev, nacl, lun, deve, mapped_lun,
+ isid, sa_res_key, all_tg_pt,
+ aptpl);
if (!pr_reg)
return -EPERM;
struct t10_pr_registration *pr_reg,
struct list_head *preempt_and_abort_list,
int dec_holders)
+ __releases(&pr_tmpl->registration_lock)
+ __acquires(&pr_tmpl->registration_lock)
{
- struct target_core_fabric_ops *tfo =
+ const struct target_core_fabric_ops *tfo =
pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
struct t10_reservation *pr_tmpl = &dev->t10_pr;
+ struct se_node_acl *nacl = pr_reg->pr_reg_nacl;
+ struct se_dev_entry *deve;
char i_buf[PR_REG_ISID_ID_LEN];
memset(i_buf, 0, PR_REG_ISID_ID_LEN);
core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
- pr_reg->pr_reg_deve->def_pr_registered = 0;
- pr_reg->pr_reg_deve->pr_res_key = 0;
if (!list_empty(&pr_reg->pr_reg_list))
list_del(&pr_reg->pr_reg_list);
/*
*/
if (dec_holders)
core_scsi3_put_pr_reg(pr_reg);
+
+ spin_unlock(&pr_tmpl->registration_lock);
/*
* Wait until all reference from any other I_T nexuses for this
* *pr_reg have been released. Because list_del() is called above,
* count back to zero, and we release *pr_reg.
*/
while (atomic_read(&pr_reg->pr_res_holders) != 0) {
- spin_unlock(&pr_tmpl->registration_lock);
pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n",
tfo->get_fabric_name());
cpu_relax();
- spin_lock(&pr_tmpl->registration_lock);
}
+ rcu_read_lock();
+ deve = target_nacl_find_deve(nacl, pr_reg->pr_res_mapped_lun);
+ if (deve)
+ clear_bit(DEF_PR_REG_ACTIVE, &deve->deve_flags);
+ rcu_read_unlock();
+
+ spin_lock(&pr_tmpl->registration_lock);
pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator"
" Node: %s%s\n", tfo->get_fabric_name(),
pr_reg->pr_reg_nacl->initiatorname,
static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg)
{
- return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys,
- &tpg->tpg_group.cg_item);
+ return target_depend_item(&tpg->tpg_group.cg_item);
}
static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg)
{
- configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,
- &tpg->tpg_group.cg_item);
-
+ target_undepend_item(&tpg->tpg_group.cg_item);
atomic_dec_mb(&tpg->tpg_pr_ref_count);
}
static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl)
{
- struct se_portal_group *tpg = nacl->se_tpg;
-
if (nacl->dynamic_node_acl)
return 0;
-
- return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys,
- &nacl->acl_group.cg_item);
+ return target_depend_item(&nacl->acl_group.cg_item);
}
static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl)
{
- struct se_portal_group *tpg = nacl->se_tpg;
-
- if (nacl->dynamic_node_acl) {
- atomic_dec_mb(&nacl->acl_pr_ref_count);
- return;
- }
-
- configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,
- &nacl->acl_group.cg_item);
-
+ if (!nacl->dynamic_node_acl)
+ target_undepend_item(&nacl->acl_group.cg_item);
atomic_dec_mb(&nacl->acl_pr_ref_count);
}
static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve)
{
- struct se_lun_acl *lun_acl = se_deve->se_lun_acl;
+ struct se_lun_acl *lun_acl;
struct se_node_acl *nacl;
struct se_portal_group *tpg;
/*
* For nacl->dynamic_node_acl=1
*/
+ lun_acl = rcu_dereference_check(se_deve->se_lun_acl,
+ atomic_read(&se_deve->pr_kref.refcount) != 0);
if (!lun_acl)
return 0;
nacl = lun_acl->se_lun_nacl;
tpg = nacl->se_tpg;
- return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys,
- &lun_acl->se_lun_group.cg_item);
+ return target_depend_item(&lun_acl->se_lun_group.cg_item);
}
static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve)
{
- struct se_lun_acl *lun_acl = se_deve->se_lun_acl;
+ struct se_lun_acl *lun_acl;
struct se_node_acl *nacl;
struct se_portal_group *tpg;
/*
* For nacl->dynamic_node_acl=1
*/
+ lun_acl = rcu_dereference_check(se_deve->se_lun_acl,
+ atomic_read(&se_deve->pr_kref.refcount) != 0);
if (!lun_acl) {
- atomic_dec_mb(&se_deve->pr_ref_count);
+ kref_put(&se_deve->pr_kref, target_pr_kref_release);
return;
}
nacl = lun_acl->se_lun_nacl;
tpg = nacl->se_tpg;
- configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,
- &lun_acl->se_lun_group.cg_item);
-
- atomic_dec_mb(&se_deve->pr_ref_count);
+ target_undepend_item(&lun_acl->se_lun_group.cg_item);
+ kref_put(&se_deve->pr_kref, target_pr_kref_release);
}
static sense_reason_t
int aptpl)
{
struct se_device *dev = cmd->se_dev;
- struct se_port *tmp_port;
struct se_portal_group *dest_tpg = NULL, *tmp_tpg;
struct se_session *se_sess = cmd->se_sess;
struct se_node_acl *dest_node_acl = NULL;
- struct se_dev_entry *dest_se_deve = NULL, *local_se_deve;
+ struct se_dev_entry *dest_se_deve = NULL;
struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e;
struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe;
LIST_HEAD(tid_dest_list);
struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp;
- struct target_core_fabric_ops *tmp_tf_ops;
- unsigned char *buf;
- unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident;
+ unsigned char *buf, *ptr, proto_ident;
+ const unsigned char *i_str;
char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN];
sense_reason_t ret;
u32 tpdl, tid_len = 0;
- int dest_local_nexus;
u32 dest_rtpi = 0;
- local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
/*
* Allocate a struct pr_transport_id_holder and setup the
- * local_node_acl and local_se_deve pointers and add to
- * struct list_head tid_dest_list for add registration
- * processing in the loop of tid_dest_list below.
+ * local_node_acl pointer and add to struct list_head tid_dest_list
+ * for add registration processing in the loop of tid_dest_list below.
*/
tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL);
if (!tidh_new) {
INIT_LIST_HEAD(&tidh_new->dest_list);
tidh_new->dest_tpg = tpg;
tidh_new->dest_node_acl = se_sess->se_node_acl;
- tidh_new->dest_se_deve = local_se_deve;
local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev,
- se_sess->se_node_acl, local_se_deve, l_isid,
+ se_sess->se_node_acl, cmd->se_lun,
+ NULL, cmd->orig_fe_lun, l_isid,
sa_res_key, all_tg_pt, aptpl);
if (!local_pr_reg) {
kfree(tidh_new);
tidh_new->dest_pr_reg = local_pr_reg;
/*
* The local I_T nexus does not hold any configfs dependances,
- * so we set tid_h->dest_local_nexus=1 to prevent the
+ * so we set tidh_new->dest_se_deve to NULL to prevent the
* configfs_undepend_item() calls in the tid_dest_list loops below.
*/
- tidh_new->dest_local_nexus = 1;
+ tidh_new->dest_se_deve = NULL;
list_add_tail(&tidh_new->dest_list, &tid_dest_list);
if (cmd->data_length < 28) {
ptr = &buf[28];
while (tpdl > 0) {
+ struct se_lun *dest_lun, *tmp_lun;
+
proto_ident = (ptr[0] & 0x0f);
dest_tpg = NULL;
spin_lock(&dev->se_port_lock);
- list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) {
- tmp_tpg = tmp_port->sep_tpg;
- if (!tmp_tpg)
- continue;
- tmp_tf_ops = tmp_tpg->se_tpg_tfo;
- if (!tmp_tf_ops)
- continue;
- if (!tmp_tf_ops->get_fabric_proto_ident ||
- !tmp_tf_ops->tpg_parse_pr_out_transport_id)
- continue;
+ list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) {
+ tmp_tpg = tmp_lun->lun_tpg;
+
/*
* Look for the matching proto_ident provided by
* the received TransportID
*/
- tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg);
- if (tmp_proto_ident != proto_ident)
+ if (tmp_tpg->proto_id != proto_ident)
continue;
- dest_rtpi = tmp_port->sep_rtpi;
+ dest_rtpi = tmp_lun->lun_rtpi;
- i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id(
- tmp_tpg, (const char *)ptr, &tid_len,
- &iport_ptr);
+ i_str = target_parse_pr_out_transport_id(tmp_tpg,
+ (const char *)ptr, &tid_len, &iport_ptr);
if (!i_str)
continue;
* from the decoded fabric module specific TransportID
* at *i_str.
*/
- spin_lock_irq(&tmp_tpg->acl_node_lock);
+ mutex_lock(&tmp_tpg->acl_node_mutex);
dest_node_acl = __core_tpg_get_initiator_node_acl(
tmp_tpg, i_str);
if (dest_node_acl)
atomic_inc_mb(&dest_node_acl->acl_pr_ref_count);
- spin_unlock_irq(&tmp_tpg->acl_node_lock);
+ mutex_unlock(&tmp_tpg->acl_node_mutex);
if (!dest_node_acl) {
core_scsi3_tpg_undepend_item(tmp_tpg);
if (core_scsi3_lunacl_depend_item(dest_se_deve)) {
pr_err("core_scsi3_lunacl_depend_item()"
" failed\n");
- atomic_dec_mb(&dest_se_deve->pr_ref_count);
+ kref_put(&dest_se_deve->pr_kref, target_pr_kref_release);
core_scsi3_nodeacl_undepend_item(dest_node_acl);
core_scsi3_tpg_undepend_item(dest_tpg);
ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
* and then call __core_scsi3_add_registration() in the
* 2nd loop which will never fail.
*/
+ dest_lun = rcu_dereference_check(dest_se_deve->se_lun,
+ atomic_read(&dest_se_deve->pr_kref.refcount) != 0);
+
dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev,
- dest_node_acl, dest_se_deve, iport_ptr,
- sa_res_key, all_tg_pt, aptpl);
+ dest_node_acl, dest_lun, dest_se_deve,
+ dest_se_deve->mapped_lun, iport_ptr,
+ sa_res_key, all_tg_pt, aptpl);
if (!dest_pr_reg) {
core_scsi3_lunacl_undepend_item(dest_se_deve);
core_scsi3_nodeacl_undepend_item(dest_node_acl);
dest_node_acl = tidh->dest_node_acl;
dest_se_deve = tidh->dest_se_deve;
dest_pr_reg = tidh->dest_pr_reg;
- dest_local_nexus = tidh->dest_local_nexus;
list_del(&tidh->dest_list);
kfree(tidh);
pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully"
" registered Transport ID for Node: %s%s Mapped LUN:"
" %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(),
- dest_node_acl->initiatorname, i_buf, dest_se_deve->mapped_lun);
+ dest_node_acl->initiatorname, i_buf, (dest_se_deve) ?
+ dest_se_deve->mapped_lun : 0);
- if (dest_local_nexus)
+ if (!dest_se_deve)
continue;
core_scsi3_lunacl_undepend_item(dest_se_deve);
dest_node_acl = tidh->dest_node_acl;
dest_se_deve = tidh->dest_se_deve;
dest_pr_reg = tidh->dest_pr_reg;
- dest_local_nexus = tidh->dest_local_nexus;
list_del(&tidh->dest_list);
kfree(tidh);
kmem_cache_free(t10_pr_reg_cache, dest_pr_reg);
- if (dest_local_nexus)
+ if (!dest_se_deve)
continue;
core_scsi3_lunacl_undepend_item(dest_se_deve);
unsigned char *buf,
u32 pr_aptpl_buf_len)
{
- struct se_lun *lun;
struct se_portal_group *tpg;
struct t10_pr_registration *pr_reg;
unsigned char tmp[512], isid_buf[32];
tmp[0] = '\0';
isid_buf[0] = '\0';
tpg = pr_reg->pr_reg_nacl->se_tpg;
- lun = pr_reg->pr_reg_tg_pt_lun;
/*
* Write out any ISID value to APTPL metadata that was included
* in the original registration.
}
if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
- pr_err("Unable to update renaming"
- " APTPL metadata\n");
+ pr_err("Unable to update renaming APTPL metadata,"
+ " reallocating larger buffer\n");
ret = -EMSGSIZE;
goto out;
}
" %d\n", tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_wwn(tpg),
tpg->se_tpg_tfo->tpg_get_tag(tpg),
- lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count);
+ pr_reg->tg_pt_sep_rtpi, pr_reg->pr_aptpl_target_lun,
+ reg_count);
if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
- pr_err("Unable to update renaming"
- " APTPL metadata\n");
+ pr_err("Unable to update renaming APTPL metadata,"
+ " reallocating larger buffer\n");
ret = -EMSGSIZE;
goto out;
}
static sense_reason_t core_scsi3_update_and_write_aptpl(struct se_device *dev, bool aptpl)
{
unsigned char *buf;
- int rc;
+ int rc, len = PR_APTPL_BUF_LEN;
if (!aptpl) {
char *null_buf = "No Registrations or Reservations\n";
return 0;
}
-
- buf = kzalloc(PR_APTPL_BUF_LEN, GFP_KERNEL);
+retry:
+ buf = vzalloc(len);
if (!buf)
return TCM_OUT_OF_RESOURCES;
- rc = core_scsi3_update_aptpl_buf(dev, buf, PR_APTPL_BUF_LEN);
+ rc = core_scsi3_update_aptpl_buf(dev, buf, len);
if (rc < 0) {
- kfree(buf);
- return TCM_OUT_OF_RESOURCES;
+ vfree(buf);
+ len *= 2;
+ goto retry;
}
rc = __core_scsi3_write_aptpl_to_file(dev, buf);
if (rc != 0) {
pr_err("SPC-3 PR: Could not update APTPL\n");
- kfree(buf);
+ vfree(buf);
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
dev->t10_pr.pr_aptpl_active = 1;
- kfree(buf);
+ vfree(buf);
pr_debug("SPC-3 PR: Set APTPL Bit Activated\n");
return 0;
}
{
struct se_session *se_sess = cmd->se_sess;
struct se_device *dev = cmd->se_dev;
- struct se_dev_entry *se_deve;
struct se_lun *se_lun = cmd->se_lun;
struct se_portal_group *se_tpg;
struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp;
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
se_tpg = se_sess->se_tpg;
- se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) {
memset(&isid_buf[0], 0, PR_REG_ISID_LEN);
* Logical Unit of the SCSI device server.
*/
if (core_scsi3_alloc_registration(cmd->se_dev,
- se_sess->se_node_acl, se_deve, isid_ptr,
+ se_sess->se_node_acl, cmd->se_lun,
+ NULL, cmd->orig_fe_lun, isid_ptr,
sa_res_key, all_tg_pt, aptpl,
register_type, 0)) {
pr_err("Unable to allocate"
if (ret != 0)
return ret;
}
-
return core_scsi3_update_and_write_aptpl(dev, aptpl);
}
spin_lock(&dev->dev_reservation_lock);
pr_res_holder = dev->dev_pr_res_holder;
if (pr_res_holder) {
- int pr_res_type = pr_res_holder->pr_res_type;
/*
* From spc4r17 Section 5.7.9: Reserving:
*
* the logical unit, then the command shall be completed with
* RESERVATION CONFLICT status.
*/
- if ((pr_res_holder != pr_reg) &&
- (pr_res_type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) &&
- (pr_res_type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
+ if (!is_reservation_holder(pr_res_holder, pr_reg)) {
struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
pr_err("SPC-3 PR: Attempted RESERVE from"
" [%s]: %s while reservation already held by"
int explicit,
int unreg)
{
- struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo;
+ const struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo;
char i_buf[PR_REG_ISID_ID_LEN];
int pr_res_type = 0, pr_res_scope = 0;
struct se_lun *se_lun = cmd->se_lun;
struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder;
struct t10_reservation *pr_tmpl = &dev->t10_pr;
- int all_reg = 0;
sense_reason_t ret = 0;
if (!se_sess || !se_lun) {
spin_unlock(&dev->dev_reservation_lock);
goto out_put_pr_reg;
}
- if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
- (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))
- all_reg = 1;
- if ((all_reg == 0) && (pr_res_holder != pr_reg)) {
+ if (!is_reservation_holder(pr_res_holder, pr_reg)) {
/*
- * Non 'All Registrants' PR Type cases..
* Release request from a registered I_T nexus that is not a
* persistent reservation holder. return GOOD status.
*/
enum preempt_type preempt_type)
{
struct se_node_acl *nacl = pr_reg->pr_reg_nacl;
- struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
+ const struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
char i_buf[PR_REG_ISID_ID_LEN];
memset(i_buf, 0, PR_REG_ISID_ID_LEN);
struct se_session *se_sess = cmd->se_sess;
struct se_device *dev = cmd->se_dev;
struct se_dev_entry *dest_se_deve = NULL;
- struct se_lun *se_lun = cmd->se_lun;
+ struct se_lun *se_lun = cmd->se_lun, *tmp_lun;
struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL;
- struct se_port *se_port;
struct se_portal_group *se_tpg, *dest_se_tpg = NULL;
- struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops;
+ const struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops;
struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg;
struct t10_reservation *pr_tmpl = &dev->t10_pr;
unsigned char *buf;
- unsigned char *initiator_str;
+ const unsigned char *initiator_str;
char *iport_ptr = NULL, i_buf[PR_REG_ISID_ID_LEN];
u32 tid_len, tmp_tid_len;
int new_reg = 0, type, scope, matching_iname;
}
spin_lock(&dev->se_port_lock);
- list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) {
- if (se_port->sep_rtpi != rtpi)
- continue;
- dest_se_tpg = se_port->sep_tpg;
- if (!dest_se_tpg)
+ list_for_each_entry(tmp_lun, &dev->dev_sep_list, lun_dev_link) {
+ if (tmp_lun->lun_rtpi != rtpi)
continue;
+ dest_se_tpg = tmp_lun->lun_tpg;
dest_tf_ops = dest_se_tpg->se_tpg_tfo;
if (!dest_tf_ops)
continue;
pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:"
" 0x%02x\n", proto_ident);
- if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) {
+ if (proto_ident != dest_se_tpg->proto_id) {
pr_err("SPC-3 PR REGISTER_AND_MOVE: Received"
" proto_ident: 0x%02x does not match ident: 0x%02x"
" from fabric: %s\n", proto_ident,
- dest_tf_ops->get_fabric_proto_ident(dest_se_tpg),
+ dest_se_tpg->proto_id,
dest_tf_ops->get_fabric_name());
ret = TCM_INVALID_PARAMETER_LIST;
goto out;
}
- if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) {
- pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not"
- " containg a valid tpg_parse_pr_out_transport_id"
- " function pointer\n");
- ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- goto out;
- }
- initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg,
+ initiator_str = target_parse_pr_out_transport_id(dest_se_tpg,
(const char *)&buf[24], &tmp_tid_len, &iport_ptr);
if (!initiator_str) {
pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
/*
* Locate the destination struct se_node_acl from the received Transport ID
*/
- spin_lock_irq(&dest_se_tpg->acl_node_lock);
+ mutex_lock(&dest_se_tpg->acl_node_mutex);
dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg,
initiator_str);
if (dest_node_acl)
atomic_inc_mb(&dest_node_acl->acl_pr_ref_count);
- spin_unlock_irq(&dest_se_tpg->acl_node_lock);
+ mutex_unlock(&dest_se_tpg->acl_node_mutex);
if (!dest_node_acl) {
pr_err("Unable to locate %s dest_node_acl for"
if (core_scsi3_lunacl_depend_item(dest_se_deve)) {
pr_err("core_scsi3_lunacl_depend_item() failed\n");
- atomic_dec_mb(&dest_se_deve->pr_ref_count);
+ kref_put(&dest_se_deve->pr_kref, target_pr_kref_release);
dest_se_deve = NULL;
ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
goto out;
* From spc4r17 section 5.7.8 Table 50 --
* Register behaviors for a REGISTER AND MOVE service action
*/
- if (pr_res_holder != pr_reg) {
+ if (!is_reservation_holder(pr_res_holder, pr_reg)) {
pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T"
" Nexus is not reservation holder\n");
spin_unlock(&dev->dev_reservation_lock);
dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
iport_ptr);
if (!dest_pr_reg) {
- if (core_scsi3_alloc_registration(cmd->se_dev,
- dest_node_acl, dest_se_deve, iport_ptr,
- sa_res_key, 0, aptpl, 2, 1)) {
- spin_unlock(&dev->dev_reservation_lock);
+ struct se_lun *dest_lun = rcu_dereference_check(dest_se_deve->se_lun,
+ atomic_read(&dest_se_deve->pr_kref.refcount) != 0);
+
+ spin_unlock(&dev->dev_reservation_lock);
+ if (core_scsi3_alloc_registration(cmd->se_dev, dest_node_acl,
+ dest_lun, dest_se_deve, dest_se_deve->mapped_lun,
+ iport_ptr, sa_res_key, 0, aptpl, 2, 1)) {
ret = TCM_INVALID_PARAMETER_LIST;
goto out;
}
+ spin_lock(&dev->dev_reservation_lock);
dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
iport_ptr);
new_reg = 1;
struct t10_pr_registration *pr_reg, *pr_reg_tmp;
struct t10_reservation *pr_tmpl = &dev->t10_pr;
unsigned char *buf;
- u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len;
+ u32 add_desc_len = 0, add_len = 0;
u32 off = 8; /* off into first Full Status descriptor */
int format_code = 0, pr_res_type = 0, pr_res_scope = 0;
+ int exp_desc_len, desc_len;
bool all_reg = false;
if (cmd->data_length < 8) {
* Determine expected length of $FABRIC_MOD specific
* TransportID full status descriptor..
*/
- exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len(
- se_tpg, se_nacl, pr_reg, &format_code);
-
- if ((exp_desc_len + add_len) > cmd->data_length) {
+ exp_desc_len = target_get_pr_transport_id_len(se_nacl, pr_reg,
+ &format_code);
+ if (exp_desc_len < 0 ||
+ exp_desc_len + add_len > cmd->data_length) {
pr_warn("SPC-3 PRIN READ_FULL_STATUS ran"
" out of buffer: %d\n", cmd->data_length);
spin_lock(&pr_tmpl->registration_lock);
* IDENTIFIER field are not defined by this standard.
*/
if (!pr_reg->pr_reg_all_tg_pt) {
- struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep;
+ u16 sep_rtpi = pr_reg->tg_pt_sep_rtpi;
- buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
- buf[off++] = (port->sep_rtpi & 0xff);
+ buf[off++] = ((sep_rtpi >> 8) & 0xff);
+ buf[off++] = (sep_rtpi & 0xff);
} else
off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */
+ buf[off+4] = se_tpg->proto_id;
+
/*
- * Now, have the $FABRIC_MOD fill in the protocol identifier
+ * Now, have the $FABRIC_MOD fill in the transport ID.
*/
- desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg,
- se_nacl, pr_reg, &format_code, &buf[off+4]);
+ desc_len = target_get_pr_transport_id(se_nacl, pr_reg,
+ &format_code, &buf[off+4]);
spin_lock(&pr_tmpl->registration_lock);
atomic_dec_mb(&pr_reg->pr_res_holders);
+
+ if (desc_len < 0)
+ break;
/*
* Set the ADDITIONAL DESCRIPTOR LENGTH
*/
return 0;
if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)
return 0;
- if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
return 0;
spin_lock(&dev->dev_reservation_lock);
projects / mirror_ubuntu-bionic-kernel.git / blobdiff