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path: root/drivers/target/target_core_device.c
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Diffstat (limited to 'drivers/target/target_core_device.c')
-rw-r--r--drivers/target/target_core_device.c288
1 files changed, 234 insertions, 54 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index e2695101bb9..98da9016715 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -4,7 +4,7 @@
* This file contains the TCM Virtual Device and Disk Transport
* agnostic related functions.
*
- * (c) Copyright 2003-2012 RisingTide Systems LLC.
+ * (c) Copyright 2003-2013 Datera, Inc.
*
* Nicholas A. Bellinger <nab@kernel.org>
*
@@ -47,6 +47,9 @@
#include "target_core_pr.h"
#include "target_core_ua.h"
+DEFINE_MUTEX(g_device_mutex);
+LIST_HEAD(g_device_list);
+
static struct se_hba *lun0_hba;
/* not static, needed by tpg.c */
struct se_device *g_lun0_dev;
@@ -68,7 +71,6 @@ transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
struct se_dev_entry *deve = se_cmd->se_deve;
deve->total_cmds++;
- deve->total_bytes += se_cmd->data_length;
if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
(deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
@@ -85,13 +87,14 @@ transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
else if (se_cmd->data_direction == DMA_FROM_DEVICE)
deve->read_bytes += se_cmd->data_length;
- deve->deve_cmds++;
-
se_lun = deve->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_cmd_flags |= SCF_SE_LUN_CMD;
+
+ percpu_ref_get(&se_lun->lun_ref);
+ se_cmd->lun_ref_active = true;
}
spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
@@ -119,24 +122,20 @@ transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
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;
- /* TODO: get rid of this and use atomics for stats */
dev = se_lun->lun_se_dev;
- spin_lock_irqsave(&dev->stats_lock, flags);
- dev->num_cmds++;
+ atomic_long_inc(&dev->num_cmds);
if (se_cmd->data_direction == DMA_TO_DEVICE)
- dev->write_bytes += se_cmd->data_length;
+ atomic_long_add(se_cmd->data_length, &dev->write_bytes);
else if (se_cmd->data_direction == DMA_FROM_DEVICE)
- dev->read_bytes += se_cmd->data_length;
- spin_unlock_irqrestore(&dev->stats_lock, flags);
-
- spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
- list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
- spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
+ atomic_long_add(se_cmd->data_length, &dev->read_bytes);
return 0;
}
@@ -226,7 +225,7 @@ struct se_dev_entry *core_get_se_deve_from_rtpi(
continue;
atomic_inc(&deve->pr_ref_count);
- smp_mb__after_atomic_inc();
+ smp_mb__after_atomic();
spin_unlock_irq(&nacl->device_list_lock);
return deve;
@@ -275,17 +274,6 @@ int core_free_device_list_for_node(
return 0;
}
-void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
-{
- struct se_dev_entry *deve;
- unsigned long flags;
-
- spin_lock_irqsave(&se_nacl->device_list_lock, flags);
- deve = se_nacl->device_list[se_cmd->orig_fe_lun];
- deve->deve_cmds--;
- spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
-}
-
void core_update_device_list_access(
u32 mapped_lun,
u32 lun_access,
@@ -325,14 +313,14 @@ int core_enable_device_list_for_node(
deve = nacl->device_list[mapped_lun];
/*
- * Check if the call is handling demo mode -> explict LUN ACL
+ * 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 -> explict"
+ " already set for demo mode -> explicit"
" LUN ACL transition\n");
spin_unlock_irq(&nacl->device_list_lock);
return -EINVAL;
@@ -340,7 +328,7 @@ int core_enable_device_list_for_node(
if (deve->se_lun != lun) {
pr_err("struct se_dev_entry->se_lun does"
" match passed struct se_lun for demo mode"
- " -> explict LUN ACL transition\n");
+ " -> explicit LUN ACL transition\n");
spin_unlock_irq(&nacl->device_list_lock);
return -EINVAL;
}
@@ -628,6 +616,7 @@ void core_dev_unexport(
dev->export_count--;
spin_unlock(&hba->device_lock);
+ lun->lun_sep = NULL;
lun->lun_se_dev = NULL;
}
@@ -713,6 +702,44 @@ int se_dev_set_max_write_same_len(
return 0;
}
+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;
+}
+
int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
{
if (flag != 0 && flag != 1) {
@@ -772,6 +799,12 @@ int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
pr_err("emulate_write_cache not supported for pSCSI\n");
return -EINVAL;
}
+ if (flag &&
+ dev->transport->get_write_cache) {
+ pr_err("emulate_write_cache not supported for this device\n");
+ 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);
@@ -860,6 +893,120 @@ int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
return 0;
}
+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;
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
{
if ((flag != 0) && (flag != 1)) {
@@ -941,6 +1088,8 @@ int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
{
+ int block_size = dev->dev_attrib.block_size;
+
if (dev->export_count) {
pr_err("dev[%p]: Unable to change SE Device"
" fabric_max_sectors while export_count is %d\n",
@@ -978,8 +1127,12 @@ int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
/*
* Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
*/
+ if (!block_size) {
+ block_size = 512;
+ pr_warn("Defaulting to 512 for zero block_size\n");
+ }
fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
- dev->dev_attrib.block_size);
+ block_size);
dev->dev_attrib.fabric_max_sectors = fabric_max_sectors;
pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
@@ -1042,29 +1195,34 @@ int se_dev_set_block_size(struct se_device *dev, u32 block_size)
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;
}
struct se_lun *core_dev_add_lun(
struct se_portal_group *tpg,
struct se_device *dev,
- u32 lun)
+ u32 unpacked_lun)
{
- struct se_lun *lun_p;
+ struct se_lun *lun;
int rc;
- lun_p = core_tpg_pre_addlun(tpg, lun);
- if (IS_ERR(lun_p))
- return lun_p;
+ lun = core_tpg_alloc_lun(tpg, unpacked_lun);
+ if (IS_ERR(lun))
+ return lun;
- rc = core_tpg_post_addlun(tpg, lun_p,
+ rc = core_tpg_add_lun(tpg, lun,
TRANSPORT_LUNFLAGS_READ_WRITE, dev);
if (rc < 0)
return ERR_PTR(rc);
pr_debug("%s_TPG[%u]_LUN[%u] - 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_p->unpacked_lun,
+ tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
/*
* Update LUN maps for dynamically added initiators when
@@ -1085,7 +1243,7 @@ struct se_lun *core_dev_add_lun(
spin_unlock_irq(&tpg->acl_node_lock);
}
- return lun_p;
+ return lun;
}
/* core_dev_del_lun():
@@ -1176,24 +1334,18 @@ static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked
struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
struct se_portal_group *tpg,
+ struct se_node_acl *nacl,
u32 mapped_lun,
- char *initiatorname,
int *ret)
{
struct se_lun_acl *lacl;
- struct se_node_acl *nacl;
- if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
+ if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
pr_err("%s InitiatorName exceeds maximum size.\n",
tpg->se_tpg_tfo->get_fabric_name());
*ret = -EOVERFLOW;
return NULL;
}
- nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
- if (!nacl) {
- *ret = -EINVAL;
- return NULL;
- }
lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
if (!lacl) {
pr_err("Unable to allocate memory for struct se_lun_acl.\n");
@@ -1204,7 +1356,8 @@ struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
INIT_LIST_HEAD(&lacl->lacl_list);
lacl->mapped_lun = mapped_lun;
lacl->se_lun_nacl = nacl;
- snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
+ snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
+ nacl->initiatorname);
return lacl;
}
@@ -1244,7 +1397,7 @@ int core_dev_add_initiator_node_lun_acl(
spin_lock(&lun->lun_acl_lock);
list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
atomic_inc(&lun->lun_acl_count);
- smp_mb__after_atomic_inc();
+ smp_mb__after_atomic();
spin_unlock(&lun->lun_acl_lock);
pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
@@ -1278,7 +1431,7 @@ int core_dev_del_initiator_node_lun_acl(
spin_lock(&lun->lun_acl_lock);
list_del(&lacl->lacl_list);
atomic_dec(&lun->lun_acl_count);
- smp_mb__after_atomic_dec();
+ smp_mb__after_atomic();
spin_unlock(&lun->lun_acl_lock);
core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
@@ -1347,6 +1500,7 @@ static void scsi_dump_inquiry(struct se_device *dev)
struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
{
struct se_device *dev;
+ struct se_lun *xcopy_lun;
dev = hba->transport->alloc_device(hba, name);
if (!dev)
@@ -1355,6 +1509,7 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
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);
INIT_LIST_HEAD(&dev->dev_list);
INIT_LIST_HEAD(&dev->dev_sep_list);
@@ -1362,13 +1517,14 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
INIT_LIST_HEAD(&dev->delayed_cmd_list);
INIT_LIST_HEAD(&dev->state_list);
INIT_LIST_HEAD(&dev->qf_cmd_list);
- spin_lock_init(&dev->stats_lock);
+ INIT_LIST_HEAD(&dev->g_dev_node);
spin_lock_init(&dev->execute_task_lock);
spin_lock_init(&dev->delayed_cmd_lock);
spin_lock_init(&dev->dev_reservation_lock);
spin_lock_init(&dev->se_port_lock);
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);
@@ -1378,12 +1534,14 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
+ INIT_LIST_HEAD(&dev->t10_alua.lba_map_list);
+ spin_lock_init(&dev->t10_alua.lba_map_lock);
- dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
dev->t10_wwn.t10_dev = dev;
dev->t10_alua.t10_dev = dev;
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;
@@ -1392,6 +1550,9 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
+ dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
+ dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
+ dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT;
dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
dev->dev_attrib.is_nonrot = DA_IS_NONROT;
dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
@@ -1405,6 +1566,14 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
+ 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);
+ init_completion(&xcopy_lun->lun_ref_comp);
+
return dev;
}
@@ -1479,6 +1648,11 @@ int target_configure_device(struct se_device *dev)
spin_lock(&hba->device_lock);
hba->dev_count++;
spin_unlock(&hba->device_lock);
+
+ mutex_lock(&g_device_mutex);
+ list_add_tail(&dev->g_dev_node, &g_device_list);
+ mutex_unlock(&g_device_mutex);
+
return 0;
out_free_alua:
@@ -1497,15 +1671,23 @@ void target_free_device(struct se_device *dev)
if (dev->dev_flags & DF_CONFIGURED) {
destroy_workqueue(dev->tmr_wq);
+ mutex_lock(&g_device_mutex);
+ list_del(&dev->g_dev_node);
+ mutex_unlock(&g_device_mutex);
+
spin_lock(&hba->device_lock);
hba->dev_count--;
spin_unlock(&hba->device_lock);
}
core_alua_free_lu_gp_mem(dev);
+ core_alua_set_lba_map(dev, NULL, 0, 0);
core_scsi3_free_all_registrations(dev);
se_release_vpd_for_dev(dev);
+ if (dev->transport->free_prot)
+ dev->transport->free_prot(dev);
+
dev->transport->free_device(dev);
}
@@ -1513,7 +1695,7 @@ int core_dev_setup_virtual_lun0(void)
{
struct se_hba *hba;
struct se_device *dev;
- char buf[16];
+ char buf[] = "rd_pages=8,rd_nullio=1";
int ret;
hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
@@ -1526,8 +1708,6 @@ int core_dev_setup_virtual_lun0(void)
goto out_free_hba;
}
- memset(buf, 0, 16);
- sprintf(buf, "rd_pages=8");
hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
ret = target_configure_device(dev);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 18:05:36 +0000