#include <asm/unaligned.h>
#include <net/sock.h>
#include <net/tcp.h>
-#include <scsi/scsi.h>
-#include <scsi/scsi_device.h>
+#include <scsi/scsi_common.h>
+#include <scsi/scsi_proto.h>
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
struct se_device *g_lun0_dev;
sense_reason_t
-transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
+transport_lookup_cmd_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
{
struct se_lun *se_lun = NULL;
struct se_session *se_sess = se_cmd->se_sess;
- struct se_device *dev;
- unsigned long flags;
-
- if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
- return TCM_NON_EXISTENT_LUN;
-
- spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
- se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
- if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
- struct se_dev_entry *deve = se_cmd->se_deve;
-
- deve->total_cmds++;
+ struct se_node_acl *nacl = se_sess->se_node_acl;
+ struct se_dev_entry *deve;
+ sense_reason_t ret = TCM_NO_SENSE;
- if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
- (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
- pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
- " Access for 0x%08x\n",
- se_cmd->se_tfo->get_fabric_name(),
- unpacked_lun);
- spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
- return TCM_WRITE_PROTECTED;
- }
+ rcu_read_lock();
+ deve = target_nacl_find_deve(nacl, unpacked_lun);
+ if (deve) {
+ atomic_long_inc(&deve->total_cmds);
if (se_cmd->data_direction == DMA_TO_DEVICE)
- deve->write_bytes += se_cmd->data_length;
+ atomic_long_add(se_cmd->data_length,
+ &deve->write_bytes);
else if (se_cmd->data_direction == DMA_FROM_DEVICE)
- deve->read_bytes += se_cmd->data_length;
+ atomic_long_add(se_cmd->data_length,
+ &deve->read_bytes);
- se_lun = deve->se_lun;
- se_cmd->se_lun = deve->se_lun;
+ se_lun = rcu_dereference(deve->se_lun);
+ se_cmd->se_lun = rcu_dereference(deve->se_lun);
se_cmd->pr_res_key = deve->pr_res_key;
se_cmd->orig_fe_lun = unpacked_lun;
se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
percpu_ref_get(&se_lun->lun_ref);
se_cmd->lun_ref_active = true;
+
+ if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
+ (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
+ pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
+ " Access for 0x%08llx\n",
+ se_cmd->se_tfo->get_fabric_name(),
+ unpacked_lun);
+ rcu_read_unlock();
+ ret = TCM_WRITE_PROTECTED;
+ goto ref_dev;
+ }
}
- spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
+ rcu_read_unlock();
if (!se_lun) {
/*
*/
if (unpacked_lun != 0) {
pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
- " Access for 0x%08x\n",
+ " Access for 0x%08llx\n",
se_cmd->se_tfo->get_fabric_name(),
unpacked_lun);
return TCM_NON_EXISTENT_LUN;
}
- /*
- * Force WRITE PROTECT for virtual LUN 0
- */
- if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
- (se_cmd->data_direction != DMA_NONE))
- return TCM_WRITE_PROTECTED;
- se_lun = &se_sess->se_tpg->tpg_virt_lun0;
- se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
+ se_lun = se_sess->se_tpg->tpg_virt_lun0;
+ se_cmd->se_lun = se_sess->se_tpg->tpg_virt_lun0;
se_cmd->orig_fe_lun = 0;
se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
percpu_ref_get(&se_lun->lun_ref);
se_cmd->lun_ref_active = true;
- }
- /* Directly associate cmd with se_dev */
- se_cmd->se_dev = se_lun->lun_se_dev;
+ /*
+ * Force WRITE PROTECT for virtual LUN 0
+ */
+ if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
+ (se_cmd->data_direction != DMA_NONE)) {
+ ret = TCM_WRITE_PROTECTED;
+ goto ref_dev;
+ }
+ }
+ /*
+ * RCU reference protected by percpu se_lun->lun_ref taken above that
+ * must drop to zero (including initial reference) before this se_lun
+ * pointer can be kfree_rcu() by the final se_lun->lun_group put via
+ * target_core_fabric_configfs.c:target_fabric_port_release
+ */
+ref_dev:
+ se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
+ atomic_long_inc(&se_cmd->se_dev->num_cmds);
- dev = se_lun->lun_se_dev;
- atomic_long_inc(&dev->num_cmds);
if (se_cmd->data_direction == DMA_TO_DEVICE)
- atomic_long_add(se_cmd->data_length, &dev->write_bytes);
+ atomic_long_add(se_cmd->data_length,
+ &se_cmd->se_dev->write_bytes);
else if (se_cmd->data_direction == DMA_FROM_DEVICE)
- atomic_long_add(se_cmd->data_length, &dev->read_bytes);
+ atomic_long_add(se_cmd->data_length,
+ &se_cmd->se_dev->read_bytes);
- return 0;
+ return ret;
}
EXPORT_SYMBOL(transport_lookup_cmd_lun);
-int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
+int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun)
{
struct se_dev_entry *deve;
struct se_lun *se_lun = NULL;
struct se_session *se_sess = se_cmd->se_sess;
+ struct se_node_acl *nacl = se_sess->se_node_acl;
struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
unsigned long flags;
- if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
- return -ENODEV;
-
- spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
- se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
- deve = se_cmd->se_deve;
-
- if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
- se_tmr->tmr_lun = deve->se_lun;
- se_cmd->se_lun = deve->se_lun;
- se_lun = deve->se_lun;
+ rcu_read_lock();
+ deve = target_nacl_find_deve(nacl, unpacked_lun);
+ if (deve) {
+ se_tmr->tmr_lun = rcu_dereference(deve->se_lun);
+ se_cmd->se_lun = rcu_dereference(deve->se_lun);
+ se_lun = rcu_dereference(deve->se_lun);
se_cmd->pr_res_key = deve->pr_res_key;
se_cmd->orig_fe_lun = unpacked_lun;
}
- spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
+ rcu_read_unlock();
if (!se_lun) {
pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
- " Access for 0x%08x\n",
+ " Access for 0x%08llx\n",
se_cmd->se_tfo->get_fabric_name(),
unpacked_lun);
return -ENODEV;
}
-
- /* Directly associate cmd with se_dev */
- se_cmd->se_dev = se_lun->lun_se_dev;
- se_tmr->tmr_dev = se_lun->lun_se_dev;
+ /*
+ * XXX: Add percpu se_lun->lun_ref reference count for TMR
+ */
+ se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev);
+ se_tmr->tmr_dev = rcu_dereference_raw(se_lun->lun_se_dev);
spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
}
EXPORT_SYMBOL(transport_lookup_tmr_lun);
+bool target_lun_is_rdonly(struct se_cmd *cmd)
+{
+ struct se_session *se_sess = cmd->se_sess;
+ struct se_dev_entry *deve;
+ bool ret;
+
+ rcu_read_lock();
+ deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun);
+ ret = (deve && deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY);
+ rcu_read_unlock();
+
+ return ret;
+}
+EXPORT_SYMBOL(target_lun_is_rdonly);
+
/*
* This function is called from core_scsi3_emulate_pro_register_and_move()
- * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
+ * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_kref
* when a matching rtpi is found.
*/
struct se_dev_entry *core_get_se_deve_from_rtpi(
{
struct se_dev_entry *deve;
struct se_lun *lun;
- struct se_port *port;
struct se_portal_group *tpg = nacl->se_tpg;
- u32 i;
- spin_lock_irq(&nacl->device_list_lock);
- for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
- deve = nacl->device_list[i];
-
- if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
- continue;
-
- lun = deve->se_lun;
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
+ lun = rcu_dereference(deve->se_lun);
if (!lun) {
pr_err("%s device entries device pointer is"
" NULL, but Initiator has access.\n",
tpg->se_tpg_tfo->get_fabric_name());
continue;
}
- port = lun->lun_sep;
- if (!port) {
- pr_err("%s device entries device pointer is"
- " NULL, but Initiator has access.\n",
- tpg->se_tpg_tfo->get_fabric_name());
- continue;
- }
- if (port->sep_rtpi != rtpi)
+ if (lun->lun_rtpi != rtpi)
continue;
- atomic_inc_mb(&deve->pr_ref_count);
- spin_unlock_irq(&nacl->device_list_lock);
+ kref_get(&deve->pr_kref);
+ rcu_read_unlock();
return deve;
}
- spin_unlock_irq(&nacl->device_list_lock);
+ rcu_read_unlock();
return NULL;
}
-int core_free_device_list_for_node(
+void core_free_device_list_for_node(
struct se_node_acl *nacl,
struct se_portal_group *tpg)
{
struct se_dev_entry *deve;
- struct se_lun *lun;
- u32 i;
-
- if (!nacl->device_list)
- return 0;
-
- spin_lock_irq(&nacl->device_list_lock);
- for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
- deve = nacl->device_list[i];
-
- if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
- continue;
-
- if (!deve->se_lun) {
- pr_err("%s device entries device pointer is"
- " NULL, but Initiator has access.\n",
- tpg->se_tpg_tfo->get_fabric_name());
- continue;
- }
- lun = deve->se_lun;
- spin_unlock_irq(&nacl->device_list_lock);
- core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
- TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
- spin_lock_irq(&nacl->device_list_lock);
+ mutex_lock(&nacl->lun_entry_mutex);
+ hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
+ struct se_lun *lun = rcu_dereference_check(deve->se_lun,
+ lockdep_is_held(&nacl->lun_entry_mutex));
+ core_disable_device_list_for_node(lun, deve, nacl, tpg);
}
- spin_unlock_irq(&nacl->device_list_lock);
-
- array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
- nacl->device_list = NULL;
-
- return 0;
+ mutex_unlock(&nacl->lun_entry_mutex);
}
void core_update_device_list_access(
- u32 mapped_lun,
+ u64 mapped_lun,
u32 lun_access,
struct se_node_acl *nacl)
{
struct se_dev_entry *deve;
- spin_lock_irq(&nacl->device_list_lock);
- deve = nacl->device_list[mapped_lun];
- if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
- deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
- deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
- } else {
- deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
- deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
+ mutex_lock(&nacl->lun_entry_mutex);
+ deve = target_nacl_find_deve(nacl, mapped_lun);
+ if (deve) {
+ if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
+ deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
+ } else {
+ deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
+ deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
+ }
}
- spin_unlock_irq(&nacl->device_list_lock);
+ mutex_unlock(&nacl->lun_entry_mutex);
}
-/* core_enable_device_list_for_node():
- *
- *
+/*
+ * Called with rcu_read_lock or nacl->device_list_lock held.
*/
+struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun)
+{
+ struct se_dev_entry *deve;
+
+ hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link)
+ if (deve->mapped_lun == mapped_lun)
+ return deve;
+
+ return NULL;
+}
+EXPORT_SYMBOL(target_nacl_find_deve);
+
+void target_pr_kref_release(struct kref *kref)
+{
+ struct se_dev_entry *deve = container_of(kref, struct se_dev_entry,
+ pr_kref);
+ complete(&deve->pr_comp);
+}
+
+static void
+target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new,
+ bool skip_new)
+{
+ struct se_dev_entry *tmp;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) {
+ if (skip_new && tmp == new)
+ continue;
+ core_scsi3_ua_allocate(tmp, 0x3F,
+ ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED);
+ }
+ rcu_read_unlock();
+}
+
int core_enable_device_list_for_node(
struct se_lun *lun,
struct se_lun_acl *lun_acl,
- u32 mapped_lun,
+ u64 mapped_lun,
u32 lun_access,
struct se_node_acl *nacl,
struct se_portal_group *tpg)
{
- struct se_port *port = lun->lun_sep;
- struct se_dev_entry *deve;
-
- spin_lock_irq(&nacl->device_list_lock);
-
- deve = nacl->device_list[mapped_lun];
-
- /*
- * Check if the call is handling demo mode -> explicit LUN ACL
- * transition. This transition must be for the same struct se_lun
- * + mapped_lun that was setup in demo mode..
- */
- if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
- if (deve->se_lun_acl != NULL) {
- pr_err("struct se_dev_entry->se_lun_acl"
- " already set for demo mode -> explicit"
- " LUN ACL transition\n");
- spin_unlock_irq(&nacl->device_list_lock);
- return -EINVAL;
- }
- if (deve->se_lun != lun) {
- pr_err("struct se_dev_entry->se_lun does"
- " match passed struct se_lun for demo mode"
- " -> explicit LUN ACL transition\n");
- spin_unlock_irq(&nacl->device_list_lock);
+ struct se_dev_entry *orig, *new;
+
+ new = kzalloc(sizeof(*new), GFP_KERNEL);
+ if (!new) {
+ pr_err("Unable to allocate se_dev_entry memory\n");
+ return -ENOMEM;
+ }
+
+ atomic_set(&new->ua_count, 0);
+ spin_lock_init(&new->ua_lock);
+ INIT_LIST_HEAD(&new->ua_list);
+ INIT_LIST_HEAD(&new->lun_link);
+
+ new->mapped_lun = mapped_lun;
+ kref_init(&new->pr_kref);
+ init_completion(&new->pr_comp);
+
+ if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)
+ new->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
+ else
+ new->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
+
+ new->creation_time = get_jiffies_64();
+ new->attach_count++;
+
+ mutex_lock(&nacl->lun_entry_mutex);
+ orig = target_nacl_find_deve(nacl, mapped_lun);
+ if (orig && orig->se_lun) {
+ struct se_lun *orig_lun = rcu_dereference_check(orig->se_lun,
+ lockdep_is_held(&nacl->lun_entry_mutex));
+
+ if (orig_lun != lun) {
+ pr_err("Existing orig->se_lun doesn't match new lun"
+ " for dynamic -> explicit NodeACL conversion:"
+ " %s\n", nacl->initiatorname);
+ mutex_unlock(&nacl->lun_entry_mutex);
+ kfree(new);
return -EINVAL;
}
- deve->se_lun_acl = lun_acl;
+ BUG_ON(orig->se_lun_acl != NULL);
- if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
- deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
- deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
- } else {
- deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
- deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
- }
+ rcu_assign_pointer(new->se_lun, lun);
+ rcu_assign_pointer(new->se_lun_acl, lun_acl);
+ hlist_del_rcu(&orig->link);
+ hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
+ mutex_unlock(&nacl->lun_entry_mutex);
- spin_unlock_irq(&nacl->device_list_lock);
- return 0;
- }
+ spin_lock(&lun->lun_deve_lock);
+ list_del(&orig->lun_link);
+ list_add_tail(&new->lun_link, &lun->lun_deve_list);
+ spin_unlock(&lun->lun_deve_lock);
- deve->se_lun = lun;
- deve->se_lun_acl = lun_acl;
- deve->mapped_lun = mapped_lun;
- deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
-
- if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
- deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
- deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
- } else {
- deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
- deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
+ kref_put(&orig->pr_kref, target_pr_kref_release);
+ wait_for_completion(&orig->pr_comp);
+
+ target_luns_data_has_changed(nacl, new, true);
+ kfree_rcu(orig, rcu_head);
+ return 0;
}
- deve->creation_time = get_jiffies_64();
- deve->attach_count++;
- spin_unlock_irq(&nacl->device_list_lock);
+ rcu_assign_pointer(new->se_lun, lun);
+ rcu_assign_pointer(new->se_lun_acl, lun_acl);
+ hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
+ mutex_unlock(&nacl->lun_entry_mutex);
- spin_lock_bh(&port->sep_alua_lock);
- list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
- spin_unlock_bh(&port->sep_alua_lock);
+ spin_lock(&lun->lun_deve_lock);
+ list_add_tail(&new->lun_link, &lun->lun_deve_list);
+ spin_unlock(&lun->lun_deve_lock);
+ target_luns_data_has_changed(nacl, new, true);
return 0;
}
-/* core_disable_device_list_for_node():
- *
- *
+/*
+ * Called with se_node_acl->lun_entry_mutex held.
*/
-int core_disable_device_list_for_node(
+void core_disable_device_list_for_node(
struct se_lun *lun,
- struct se_lun_acl *lun_acl,
- u32 mapped_lun,
- u32 lun_access,
+ struct se_dev_entry *orig,
struct se_node_acl *nacl,
struct se_portal_group *tpg)
{
- struct se_port *port = lun->lun_sep;
- struct se_dev_entry *deve = nacl->device_list[mapped_lun];
-
+ /*
+ * rcu_dereference_raw protected by se_lun->lun_group symlink
+ * reference to se_device->dev_group.
+ */
+ struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
/*
* If the MappedLUN entry is being disabled, the entry in
- * port->sep_alua_list must be removed now before clearing the
+ * lun->lun_deve_list must be removed now before clearing the
* struct se_dev_entry pointers below as logic in
* core_alua_do_transition_tg_pt() depends on these being present.
*
* deve->se_lun_acl will be NULL for demo-mode created LUNs
* that have not been explicitly converted to MappedLUNs ->
- * struct se_lun_acl, but we remove deve->alua_port_list from
- * port->sep_alua_list. This also means that active UAs and
+ * struct se_lun_acl, but we remove deve->lun_link from
+ * lun->lun_deve_list. This also means that active UAs and
* NodeACL context specific PR metadata for demo-mode
* MappedLUN *deve will be released below..
*/
- spin_lock_bh(&port->sep_alua_lock);
- list_del(&deve->alua_port_list);
- spin_unlock_bh(&port->sep_alua_lock);
+ spin_lock(&lun->lun_deve_lock);
+ list_del(&orig->lun_link);
+ spin_unlock(&lun->lun_deve_lock);
/*
- * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
- * PR operation to complete.
+ * Disable struct se_dev_entry LUN ACL mapping
*/
- while (atomic_read(&deve->pr_ref_count) != 0)
- cpu_relax();
+ core_scsi3_ua_release_all(orig);
- spin_lock_irq(&nacl->device_list_lock);
+ hlist_del_rcu(&orig->link);
+ clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags);
+ orig->lun_flags = 0;
+ orig->creation_time = 0;
+ orig->attach_count--;
/*
- * Disable struct se_dev_entry LUN ACL mapping
+ * Before firing off RCU callback, wait for any in process SPEC_I_PT=1
+ * or REGISTER_AND_MOVE PR operation to complete.
*/
- core_scsi3_ua_release_all(deve);
- deve->se_lun = NULL;
- deve->se_lun_acl = NULL;
- deve->lun_flags = 0;
- deve->creation_time = 0;
- deve->attach_count--;
- spin_unlock_irq(&nacl->device_list_lock);
-
- core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
- return 0;
+ kref_put(&orig->pr_kref, target_pr_kref_release);
+ wait_for_completion(&orig->pr_comp);
+
+ rcu_assign_pointer(orig->se_lun, NULL);
+ rcu_assign_pointer(orig->se_lun_acl, NULL);
+
+ kfree_rcu(orig, rcu_head);
+
+ core_scsi3_free_pr_reg_from_nacl(dev, nacl);
+ target_luns_data_has_changed(nacl, NULL, false);
}
/* core_clear_lun_from_tpg():
{
struct se_node_acl *nacl;
struct se_dev_entry *deve;
- u32 i;
- spin_lock_irq(&tpg->acl_node_lock);
+ mutex_lock(&tpg->acl_node_mutex);
list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
- spin_unlock_irq(&tpg->acl_node_lock);
- spin_lock_irq(&nacl->device_list_lock);
- for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
- deve = nacl->device_list[i];
- if (lun != deve->se_lun)
- continue;
- spin_unlock_irq(&nacl->device_list_lock);
+ mutex_lock(&nacl->lun_entry_mutex);
+ hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) {
+ struct se_lun *tmp_lun = rcu_dereference_check(deve->se_lun,
+ lockdep_is_held(&nacl->lun_entry_mutex));
- core_disable_device_list_for_node(lun, NULL,
- deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
- nacl, tpg);
+ if (lun != tmp_lun)
+ continue;
- spin_lock_irq(&nacl->device_list_lock);
+ core_disable_device_list_for_node(lun, deve, nacl, tpg);
}
- spin_unlock_irq(&nacl->device_list_lock);
-
- spin_lock_irq(&tpg->acl_node_lock);
+ mutex_unlock(&nacl->lun_entry_mutex);
}
- spin_unlock_irq(&tpg->acl_node_lock);
+ mutex_unlock(&tpg->acl_node_mutex);
}
-static struct se_port *core_alloc_port(struct se_device *dev)
+int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev)
{
- struct se_port *port, *port_tmp;
-
- port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
- if (!port) {
- pr_err("Unable to allocate struct se_port\n");
- return ERR_PTR(-ENOMEM);
- }
- INIT_LIST_HEAD(&port->sep_alua_list);
- INIT_LIST_HEAD(&port->sep_list);
- atomic_set(&port->sep_tg_pt_secondary_offline, 0);
- spin_lock_init(&port->sep_alua_lock);
- mutex_init(&port->sep_tg_pt_md_mutex);
+ struct se_lun *tmp;
spin_lock(&dev->se_port_lock);
- if (dev->dev_port_count == 0x0000ffff) {
+ if (dev->export_count == 0x0000ffff) {
pr_warn("Reached dev->dev_port_count =="
" 0x0000ffff\n");
spin_unlock(&dev->se_port_lock);
- return ERR_PTR(-ENOSPC);
+ return -ENOSPC;
}
again:
/*
* 2h Relative port 2, historically known as port B
* 3h to FFFFh Relative port 3 through 65 535
*/
- port->sep_rtpi = dev->dev_rpti_counter++;
- if (!port->sep_rtpi)
+ lun->lun_rtpi = dev->dev_rpti_counter++;
+ if (!lun->lun_rtpi)
goto again;
- list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
+ list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) {
/*
* Make sure RELATIVE TARGET PORT IDENTIFIER is unique
* for 16-bit wrap..
*/
- if (port->sep_rtpi == port_tmp->sep_rtpi)
+ if (lun->lun_rtpi == tmp->lun_rtpi)
goto again;
}
spin_unlock(&dev->se_port_lock);
- return port;
-}
-
-static void core_export_port(
- struct se_device *dev,
- struct se_portal_group *tpg,
- struct se_port *port,
- struct se_lun *lun)
-{
- struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
-
- spin_lock(&dev->se_port_lock);
- spin_lock(&lun->lun_sep_lock);
- port->sep_tpg = tpg;
- port->sep_lun = lun;
- lun->lun_sep = port;
- spin_unlock(&lun->lun_sep_lock);
-
- list_add_tail(&port->sep_list, &dev->dev_sep_list);
- spin_unlock(&dev->se_port_lock);
-
- if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) &&
- !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
- tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
- if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
- pr_err("Unable to allocate t10_alua_tg_pt"
- "_gp_member_t\n");
- return;
- }
- spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
- __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
- dev->t10_alua.default_tg_pt_gp);
- spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
- pr_debug("%s/%s: Adding to default ALUA Target Port"
- " Group: alua/default_tg_pt_gp\n",
- dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
- }
-
- dev->dev_port_count++;
- port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */
-}
-
-/*
- * Called with struct se_device->se_port_lock spinlock held.
- */
-static void core_release_port(struct se_device *dev, struct se_port *port)
- __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
-{
- /*
- * Wait for any port reference for PR ALL_TG_PT=1 operation
- * to complete in __core_scsi3_alloc_registration()
- */
- spin_unlock(&dev->se_port_lock);
- if (atomic_read(&port->sep_tg_pt_ref_cnt))
- cpu_relax();
- spin_lock(&dev->se_port_lock);
-
- core_alua_free_tg_pt_gp_mem(port);
-
- list_del(&port->sep_list);
- dev->dev_port_count--;
- kfree(port);
-}
-
-int core_dev_export(
- struct se_device *dev,
- struct se_portal_group *tpg,
- struct se_lun *lun)
-{
- struct se_hba *hba = dev->se_hba;
- struct se_port *port;
-
- port = core_alloc_port(dev);
- if (IS_ERR(port))
- return PTR_ERR(port);
-
- lun->lun_se_dev = dev;
-
- spin_lock(&hba->device_lock);
- dev->export_count++;
- spin_unlock(&hba->device_lock);
-
- core_export_port(dev, tpg, port, lun);
return 0;
}
-void core_dev_unexport(
- struct se_device *dev,
- struct se_portal_group *tpg,
- struct se_lun *lun)
-{
- struct se_hba *hba = dev->se_hba;
- struct se_port *port = lun->lun_sep;
-
- spin_lock(&lun->lun_sep_lock);
- if (lun->lun_se_dev == NULL) {
- spin_unlock(&lun->lun_sep_lock);
- return;
- }
- spin_unlock(&lun->lun_sep_lock);
-
- spin_lock(&dev->se_port_lock);
- core_release_port(dev, port);
- spin_unlock(&dev->se_port_lock);
-
- spin_lock(&hba->device_lock);
- dev->export_count--;
- spin_unlock(&hba->device_lock);
-
- lun->lun_sep = NULL;
- lun->lun_se_dev = NULL;
-}
-
static void se_release_vpd_for_dev(struct se_device *dev)
{
struct t10_vpd *vpd, *vpd_tmp;
return aligned_max_sectors;
}
-bool se_dev_check_wce(struct se_device *dev)
-{
- bool wce = false;
-
- if (dev->transport->get_write_cache)
- wce = dev->transport->get_write_cache(dev);
- else if (dev->dev_attrib.emulate_write_cache > 0)
- wce = true;
-
- return wce;
-}
-
-int se_dev_set_max_unmap_lba_count(
- struct se_device *dev,
- u32 max_unmap_lba_count)
-{
- dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
- pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
- dev, dev->dev_attrib.max_unmap_lba_count);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count);
-
-int se_dev_set_max_unmap_block_desc_count(
- struct se_device *dev,
- u32 max_unmap_block_desc_count)
-{
- dev->dev_attrib.max_unmap_block_desc_count =
- max_unmap_block_desc_count;
- pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
- dev, dev->dev_attrib.max_unmap_block_desc_count);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count);
-
-int se_dev_set_unmap_granularity(
- struct se_device *dev,
- u32 unmap_granularity)
-{
- dev->dev_attrib.unmap_granularity = unmap_granularity;
- pr_debug("dev[%p]: Set unmap_granularity: %u\n",
- dev, dev->dev_attrib.unmap_granularity);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_unmap_granularity);
-
-int se_dev_set_unmap_granularity_alignment(
- struct se_device *dev,
- u32 unmap_granularity_alignment)
-{
- dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
- pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
- dev, dev->dev_attrib.unmap_granularity_alignment);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment);
-
-int se_dev_set_max_write_same_len(
- struct se_device *dev,
- u32 max_write_same_len)
-{
- dev->dev_attrib.max_write_same_len = max_write_same_len;
- pr_debug("dev[%p]: Set max_write_same_len: %u\n",
- dev, dev->dev_attrib.max_write_same_len);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_max_write_same_len);
-
-static void dev_set_t10_wwn_model_alias(struct se_device *dev)
-{
- const char *configname;
-
- configname = config_item_name(&dev->dev_group.cg_item);
- if (strlen(configname) >= 16) {
- pr_warn("dev[%p]: Backstore name '%s' is too long for "
- "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
- configname);
- }
- snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
-}
-
-int se_dev_set_emulate_model_alias(struct se_device *dev, int flag)
-{
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to change model alias"
- " while export_count is %d\n",
- dev, dev->export_count);
- return -EINVAL;
- }
-
- if (flag != 0 && flag != 1) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
-
- if (flag) {
- dev_set_t10_wwn_model_alias(dev);
- } else {
- strncpy(&dev->t10_wwn.model[0],
- dev->transport->inquiry_prod, 16);
- }
- dev->dev_attrib.emulate_model_alias = flag;
-
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_model_alias);
-
-int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
-{
- if (flag != 0 && flag != 1) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
-
- if (flag) {
- pr_err("dpo_emulated not supported\n");
- return -EINVAL;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_dpo);
-
-int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
-{
- if (flag != 0 && flag != 1) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
- if (flag &&
- dev->transport->get_write_cache) {
- pr_warn("emulate_fua_write not supported for this device, ignoring\n");
- return 0;
- }
- if (dev->export_count) {
- pr_err("emulate_fua_write cannot be changed with active"
- " exports: %d\n", dev->export_count);
- return -EINVAL;
- }
- dev->dev_attrib.emulate_fua_write = flag;
- pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
- dev, dev->dev_attrib.emulate_fua_write);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_fua_write);
-
-int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
-{
- if (flag != 0 && flag != 1) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
-
- if (flag) {
- pr_err("ua read emulated not supported\n");
- return -EINVAL;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_fua_read);
-
-int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
-{
- if (flag != 0 && flag != 1) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
- if (flag &&
- dev->transport->get_write_cache) {
- pr_err("emulate_write_cache not supported for this device\n");
- return -EINVAL;
- }
- if (dev->export_count) {
- pr_err("emulate_write_cache cannot be changed with active"
- " exports: %d\n", dev->export_count);
- return -EINVAL;
- }
- dev->dev_attrib.emulate_write_cache = flag;
- pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
- dev, dev->dev_attrib.emulate_write_cache);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_write_cache);
-
-int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
-{
- if ((flag != 0) && (flag != 1) && (flag != 2)) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
-
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device"
- " UA_INTRLCK_CTRL while export_count is %d\n",
- dev, dev->export_count);
- return -EINVAL;
- }
- dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
- pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
- dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
-
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl);
-
-int se_dev_set_emulate_tas(struct se_device *dev, int flag)
-{
- if ((flag != 0) && (flag != 1)) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
-
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device TAS while"
- " export_count is %d\n",
- dev, dev->export_count);
- return -EINVAL;
- }
- dev->dev_attrib.emulate_tas = flag;
- pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
- dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
-
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_tas);
-
-int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
-{
- if ((flag != 0) && (flag != 1)) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
- /*
- * We expect this value to be non-zero when generic Block Layer
- * Discard supported is detected iblock_create_virtdevice().
- */
- if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
- pr_err("Generic Block Discard not supported\n");
- return -ENOSYS;
- }
-
- dev->dev_attrib.emulate_tpu = flag;
- pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
- dev, flag);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_tpu);
-
-int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
-{
- if ((flag != 0) && (flag != 1)) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
- /*
- * We expect this value to be non-zero when generic Block Layer
- * Discard supported is detected iblock_create_virtdevice().
- */
- if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
- pr_err("Generic Block Discard not supported\n");
- return -ENOSYS;
- }
-
- dev->dev_attrib.emulate_tpws = flag;
- pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
- dev, flag);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_tpws);
-
-int se_dev_set_emulate_caw(struct se_device *dev, int flag)
-{
- if (flag != 0 && flag != 1) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
- dev->dev_attrib.emulate_caw = flag;
- pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n",
- dev, flag);
-
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_caw);
-
-int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
-{
- if (flag != 0 && flag != 1) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
- dev->dev_attrib.emulate_3pc = flag;
- pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n",
- dev, flag);
-
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_3pc);
-
-int se_dev_set_pi_prot_type(struct se_device *dev, int flag)
-{
- int rc, old_prot = dev->dev_attrib.pi_prot_type;
-
- if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
- pr_err("Illegal value %d for pi_prot_type\n", flag);
- return -EINVAL;
- }
- if (flag == 2) {
- pr_err("DIF TYPE2 protection currently not supported\n");
- return -ENOSYS;
- }
- if (dev->dev_attrib.hw_pi_prot_type) {
- pr_warn("DIF protection enabled on underlying hardware,"
- " ignoring\n");
- return 0;
- }
- if (!dev->transport->init_prot || !dev->transport->free_prot) {
- /* 0 is only allowed value for non-supporting backends */
- if (flag == 0)
- return 0;
-
- pr_err("DIF protection not supported by backend: %s\n",
- dev->transport->name);
- return -ENOSYS;
- }
- if (!(dev->dev_flags & DF_CONFIGURED)) {
- pr_err("DIF protection requires device to be configured\n");
- return -ENODEV;
- }
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device PROT type while"
- " export_count is %d\n", dev, dev->export_count);
- return -EINVAL;
- }
-
- dev->dev_attrib.pi_prot_type = flag;
-
- if (flag && !old_prot) {
- rc = dev->transport->init_prot(dev);
- if (rc) {
- dev->dev_attrib.pi_prot_type = old_prot;
- return rc;
- }
-
- } else if (!flag && old_prot) {
- dev->transport->free_prot(dev);
- }
- pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
-
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_pi_prot_type);
-
-int se_dev_set_pi_prot_format(struct se_device *dev, int flag)
-{
- int rc;
-
- if (!flag)
- return 0;
-
- if (flag != 1) {
- pr_err("Illegal value %d for pi_prot_format\n", flag);
- return -EINVAL;
- }
- if (!dev->transport->format_prot) {
- pr_err("DIF protection format not supported by backend %s\n",
- dev->transport->name);
- return -ENOSYS;
- }
- if (!(dev->dev_flags & DF_CONFIGURED)) {
- pr_err("DIF protection format requires device to be configured\n");
- return -ENODEV;
- }
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to format SE Device PROT type while"
- " export_count is %d\n", dev, dev->export_count);
- return -EINVAL;
- }
-
- rc = dev->transport->format_prot(dev);
- if (rc)
- return rc;
-
- pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
-
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_pi_prot_format);
-
-int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
-{
- if ((flag != 0) && (flag != 1)) {
- pr_err("Illegal value %d\n", flag);
- return -EINVAL;
- }
- dev->dev_attrib.enforce_pr_isids = flag;
- pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
- (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_enforce_pr_isids);
-
-int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag)
-{
- if ((flag != 0) && (flag != 1)) {
- printk(KERN_ERR "Illegal value %d\n", flag);
- return -EINVAL;
- }
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to set force_pr_aptpl while"
- " export_count is %d\n", dev, dev->export_count);
- return -EINVAL;
- }
-
- dev->dev_attrib.force_pr_aptpl = flag;
- pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_force_pr_aptpl);
-
-int se_dev_set_is_nonrot(struct se_device *dev, int flag)
-{
- if ((flag != 0) && (flag != 1)) {
- printk(KERN_ERR "Illegal value %d\n", flag);
- return -EINVAL;
- }
- dev->dev_attrib.is_nonrot = flag;
- pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
- dev, flag);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_is_nonrot);
-
-int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
-{
- if (flag != 0) {
- printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
- " reordering not implemented\n", dev);
- return -ENOSYS;
- }
- dev->dev_attrib.emulate_rest_reord = flag;
- pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_emulate_rest_reord);
-
-/*
- * Note, this can only be called on unexported SE Device Object.
- */
-int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
-{
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device TCQ while"
- " export_count is %d\n",
- dev, dev->export_count);
- return -EINVAL;
- }
- if (!queue_depth) {
- pr_err("dev[%p]: Illegal ZERO value for queue"
- "_depth\n", dev);
- return -EINVAL;
- }
-
- if (queue_depth > dev->dev_attrib.queue_depth) {
- if (queue_depth > dev->dev_attrib.hw_queue_depth) {
- pr_err("dev[%p]: Passed queue_depth:"
- " %u exceeds TCM/SE_Device MAX"
- " TCQ: %u\n", dev, queue_depth,
- dev->dev_attrib.hw_queue_depth);
- return -EINVAL;
- }
- }
- dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
- pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
- dev, queue_depth);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_queue_depth);
-
-int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
-{
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device"
- " optimal_sectors while export_count is %d\n",
- dev, dev->export_count);
- return -EINVAL;
- }
- if (optimal_sectors > dev->dev_attrib.hw_max_sectors) {
- pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
- " greater than hw_max_sectors: %u\n", dev,
- optimal_sectors, dev->dev_attrib.hw_max_sectors);
- return -EINVAL;
- }
-
- dev->dev_attrib.optimal_sectors = optimal_sectors;
- pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
- dev, optimal_sectors);
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_optimal_sectors);
-
-int se_dev_set_block_size(struct se_device *dev, u32 block_size)
-{
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device block_size"
- " while export_count is %d\n",
- dev, dev->export_count);
- return -EINVAL;
- }
-
- if ((block_size != 512) &&
- (block_size != 1024) &&
- (block_size != 2048) &&
- (block_size != 4096)) {
- pr_err("dev[%p]: Illegal value for block_device: %u"
- " for SE device, must be 512, 1024, 2048 or 4096\n",
- dev, block_size);
- return -EINVAL;
- }
-
- dev->dev_attrib.block_size = block_size;
- pr_debug("dev[%p]: SE Device block_size changed to %u\n",
- dev, block_size);
-
- if (dev->dev_attrib.max_bytes_per_io)
- dev->dev_attrib.hw_max_sectors =
- dev->dev_attrib.max_bytes_per_io / block_size;
-
- return 0;
-}
-EXPORT_SYMBOL(se_dev_set_block_size);
-
-struct se_lun *core_dev_add_lun(
+int core_dev_add_lun(
struct se_portal_group *tpg,
struct se_device *dev,
- u32 unpacked_lun)
+ struct se_lun *lun)
{
- struct se_lun *lun;
int rc;
- lun = core_tpg_alloc_lun(tpg, unpacked_lun);
- if (IS_ERR(lun))
- return lun;
-
rc = core_tpg_add_lun(tpg, lun,
TRANSPORT_LUNFLAGS_READ_WRITE, dev);
if (rc < 0)
- return ERR_PTR(rc);
+ return rc;
- pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
+ pr_debug("%s_TPG[%u]_LUN[%llu] - Activated %s Logical Unit from"
" CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
*/
if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
struct se_node_acl *acl;
- spin_lock_irq(&tpg->acl_node_lock);
+
+ mutex_lock(&tpg->acl_node_mutex);
list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
if (acl->dynamic_node_acl &&
(!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
- spin_unlock_irq(&tpg->acl_node_lock);
- core_tpg_add_node_to_devs(acl, tpg);
- spin_lock_irq(&tpg->acl_node_lock);
+ core_tpg_add_node_to_devs(acl, tpg, lun);
}
}
- spin_unlock_irq(&tpg->acl_node_lock);
+ mutex_unlock(&tpg->acl_node_mutex);
}
- return lun;
+ return 0;
}
/* core_dev_del_lun():
struct se_portal_group *tpg,
struct se_lun *lun)
{
- pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from"
+ pr_debug("%s_TPG[%u]_LUN[%llu] - Deactivating %s Logical Unit from"
" device object\n", tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
tpg->se_tpg_tfo->get_fabric_name());
core_tpg_remove_lun(tpg, lun);
}
-struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
-{
- struct se_lun *lun;
-
- spin_lock(&tpg->tpg_lun_lock);
- if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
- pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
- "_PER_TPG-1: %u for Target Portal Group: %hu\n",
- tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
- TRANSPORT_MAX_LUNS_PER_TPG-1,
- tpg->se_tpg_tfo->tpg_get_tag(tpg));
- spin_unlock(&tpg->tpg_lun_lock);
- return NULL;
- }
- lun = tpg->tpg_lun_list[unpacked_lun];
-
- if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
- pr_err("%s Logical Unit Number: %u is not free on"
- " Target Portal Group: %hu, ignoring request.\n",
- tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
- tpg->se_tpg_tfo->tpg_get_tag(tpg));
- spin_unlock(&tpg->tpg_lun_lock);
- return NULL;
- }
- spin_unlock(&tpg->tpg_lun_lock);
-
- return lun;
-}
-
-/* core_dev_get_lun():
- *
- *
- */
-static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
-{
- struct se_lun *lun;
-
- spin_lock(&tpg->tpg_lun_lock);
- if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
- pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
- "_TPG-1: %u for Target Portal Group: %hu\n",
- tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
- TRANSPORT_MAX_LUNS_PER_TPG-1,
- tpg->se_tpg_tfo->tpg_get_tag(tpg));
- spin_unlock(&tpg->tpg_lun_lock);
- return NULL;
- }
- lun = tpg->tpg_lun_list[unpacked_lun];
-
- if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
- pr_err("%s Logical Unit Number: %u is not active on"
- " Target Portal Group: %hu, ignoring request.\n",
- tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
- tpg->se_tpg_tfo->tpg_get_tag(tpg));
- spin_unlock(&tpg->tpg_lun_lock);
- return NULL;
- }
- spin_unlock(&tpg->tpg_lun_lock);
-
- return lun;
-}
-
struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
struct se_portal_group *tpg,
struct se_node_acl *nacl,
- u32 mapped_lun,
+ u64 mapped_lun,
int *ret)
{
struct se_lun_acl *lacl;
return NULL;
}
- INIT_LIST_HEAD(&lacl->lacl_list);
lacl->mapped_lun = mapped_lun;
lacl->se_lun_nacl = nacl;
- snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
- nacl->initiatorname);
return lacl;
}
int core_dev_add_initiator_node_lun_acl(
struct se_portal_group *tpg,
struct se_lun_acl *lacl,
- u32 unpacked_lun,
+ struct se_lun *lun,
u32 lun_access)
{
- struct se_lun *lun;
- struct se_node_acl *nacl;
-
- lun = core_dev_get_lun(tpg, unpacked_lun);
- if (!lun) {
- pr_err("%s Logical Unit Number: %u is not active on"
- " Target Portal Group: %hu, ignoring request.\n",
- tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
- tpg->se_tpg_tfo->tpg_get_tag(tpg));
- return -EINVAL;
- }
+ struct se_node_acl *nacl = lacl->se_lun_nacl;
+ /*
+ * rcu_dereference_raw protected by se_lun->lun_group symlink
+ * reference to se_device->dev_group.
+ */
+ struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev);
- nacl = lacl->se_lun_nacl;
if (!nacl)
return -EINVAL;
lun_access, nacl, tpg) < 0)
return -EINVAL;
- spin_lock(&lun->lun_acl_lock);
- list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
- atomic_inc_mb(&lun->lun_acl_count);
- spin_unlock(&lun->lun_acl_lock);
-
- pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
+ pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - Added %s ACL for "
" InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
- tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun,
(lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
- lacl->initiatorname);
+ nacl->initiatorname);
/*
* Check to see if there are any existing persistent reservation APTPL
* pre-registrations that need to be enabled for this LUN ACL..
*/
- core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl,
+ core_scsi3_check_aptpl_registration(dev, tpg, lun, nacl,
lacl->mapped_lun);
return 0;
}
-/* core_dev_del_initiator_node_lun_acl():
- *
- *
- */
int core_dev_del_initiator_node_lun_acl(
- struct se_portal_group *tpg,
struct se_lun *lun,
struct se_lun_acl *lacl)
{
+ struct se_portal_group *tpg = lun->lun_tpg;
struct se_node_acl *nacl;
+ struct se_dev_entry *deve;
nacl = lacl->se_lun_nacl;
if (!nacl)
return -EINVAL;
- spin_lock(&lun->lun_acl_lock);
- list_del(&lacl->lacl_list);
- atomic_dec_mb(&lun->lun_acl_count);
- spin_unlock(&lun->lun_acl_lock);
-
- core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
- TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
-
- lacl->se_lun = NULL;
+ mutex_lock(&nacl->lun_entry_mutex);
+ deve = target_nacl_find_deve(nacl, lacl->mapped_lun);
+ if (deve)
+ core_disable_device_list_for_node(lun, deve, nacl, tpg);
+ mutex_unlock(&nacl->lun_entry_mutex);
- pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
- " InitiatorNode: %s Mapped LUN: %u\n",
+ pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for"
+ " InitiatorNode: %s Mapped LUN: %llu\n",
tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
- lacl->initiatorname, lacl->mapped_lun);
+ nacl->initiatorname, lacl->mapped_lun);
return 0;
}
struct se_lun_acl *lacl)
{
pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
- " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
+ " Mapped LUN: %llu\n", tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_tag(tpg),
tpg->se_tpg_tfo->get_fabric_name(),
- lacl->initiatorname, lacl->mapped_lun);
+ lacl->se_lun_nacl->initiatorname, lacl->mapped_lun);
kfree(lacl);
}
struct se_device *dev;
struct se_lun *xcopy_lun;
- dev = hba->transport->alloc_device(hba, name);
+ dev = hba->backend->ops->alloc_device(hba, name);
if (!dev)
return NULL;
dev->dev_link_magic = SE_DEV_LINK_MAGIC;
dev->se_hba = hba;
- dev->transport = hba->transport;
- dev->prot_length = sizeof(struct se_dif_v1_tuple);
+ dev->transport = hba->backend->ops;
+ dev->prot_length = sizeof(struct t10_pi_tuple);
+ dev->hba_index = hba->hba_index;
INIT_LIST_HEAD(&dev->dev_list);
INIT_LIST_HEAD(&dev->dev_sep_list);
spin_lock_init(&dev->se_tmr_lock);
spin_lock_init(&dev->qf_cmd_lock);
sema_init(&dev->caw_sem, 1);
- atomic_set(&dev->dev_ordered_id, 0);
INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
INIT_LIST_HEAD(&dev->t10_pr.registration_list);
dev->dev_attrib.da_dev = dev;
dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS;
- dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
- dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
- dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
+ dev->dev_attrib.emulate_dpo = 1;
+ dev->dev_attrib.emulate_fua_write = 1;
+ dev->dev_attrib.emulate_fua_read = 1;
dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
xcopy_lun = &dev->xcopy_lun;
- xcopy_lun->lun_se_dev = dev;
- init_completion(&xcopy_lun->lun_shutdown_comp);
- INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
- spin_lock_init(&xcopy_lun->lun_acl_lock);
- spin_lock_init(&xcopy_lun->lun_sep_lock);
+ rcu_assign_pointer(xcopy_lun->lun_se_dev, dev);
init_completion(&xcopy_lun->lun_ref_comp);
+ INIT_LIST_HEAD(&xcopy_lun->lun_deve_list);
+ INIT_LIST_HEAD(&xcopy_lun->lun_dev_link);
+ mutex_init(&xcopy_lun->lun_tg_pt_md_mutex);
+ xcopy_lun->lun_tpg = &xcopy_pt_tpg;
return dev;
}
+/*
+ * Check if the underlying struct block_device request_queue supports
+ * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM
+ * in ATA and we need to set TPE=1
+ */
+bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
+ struct request_queue *q, int block_size)
+{
+ if (!blk_queue_discard(q))
+ return false;
+
+ attrib->max_unmap_lba_count = (q->limits.max_discard_sectors << 9) /
+ block_size;
+ /*
+ * Currently hardcoded to 1 in Linux/SCSI code..
+ */
+ attrib->max_unmap_block_desc_count = 1;
+ attrib->unmap_granularity = q->limits.discard_granularity / block_size;
+ attrib->unmap_granularity_alignment = q->limits.discard_alignment /
+ block_size;
+ return true;
+}
+EXPORT_SYMBOL(target_configure_unmap_from_queue);
+
+/*
+ * Convert from blocksize advertised to the initiator to the 512 byte
+ * units unconditionally used by the Linux block layer.
+ */
+sector_t target_to_linux_sector(struct se_device *dev, sector_t lb)
+{
+ switch (dev->dev_attrib.block_size) {
+ case 4096:
+ return lb << 3;
+ case 2048:
+ return lb << 2;
+ case 1024:
+ return lb << 1;
+ default:
+ return lb;
+ }
+}
+EXPORT_SYMBOL(target_to_linux_sector);
+
int target_configure_device(struct se_device *dev)
{
struct se_hba *hba = dev->se_hba;
goto out_free_hba;
}
- hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
+ hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf));
ret = target_configure_device(dev);
if (ret)
Code Review / kvmfornfv.git / blobdiff