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target: Subsume se_port + t10_alua_tg_pt_gp_member into se_lun

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This patch eliminates all se_port + t10_alua_tg_pt_gp_member usage,
and converts current users to direct se_lun pointer dereference.

This includes the removal of core_export_port(), core_release_port()
core_dev_export() and core_dev_unexport().  Along with conversion
of special case se_lun pointer dereference within PR ALL_TG_PT=1
and ALUA access state transition UNIT_ATTENTION handling.

Also, update core_enable_device_list_for_node() to reference the
new per se_lun->lun_deve_list when creating a new entry, or
replacing an existing one via RCU.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Christoph Hellwig 2015-05-25 21:33:08 -07:00 committed by Nicholas Bellinger
parent b3eeea6619
commit adf653f92f
13 changed files with 461 additions and 810 deletions
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390
drivers/target/target_core_alua.c
View file

@ -43,11 +43,13 @@
static sense_reason_t core_alua_check_transition(int state, int valid,
int *primary);
static int core_alua_set_tg_pt_secondary_state(
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
struct se_port *port, int explicit, int offline);
struct se_lun *lun, int explicit, int offline);
static char *core_alua_dump_state(int state);
static void __target_attach_tg_pt_gp(struct se_lun *lun,
struct t10_alua_tg_pt_gp *tg_pt_gp);
static u16 alua_lu_gps_counter;
static u32 alua_lu_gps_count;
@ -145,9 +147,8 @@ sense_reason_t
target_emulate_report_target_port_groups(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct se_port *port;
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
struct se_lun *lun;
unsigned char *buf;
u32 rd_len = 0, off;
int ext_hdr = (cmd->t_task_cdb[1] & 0x20);
@ -222,9 +223,8 @@ target_emulate_report_target_port_groups(struct se_cmd *cmd)
rd_len += 8;
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
tg_pt_gp_mem_list) {
port = tg_pt_gp_mem->tg_pt;
list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
lun_tg_pt_gp_link) {
/*
* Start Target Port descriptor format
*
@ -234,8 +234,8 @@ target_emulate_report_target_port_groups(struct se_cmd *cmd)
/*
* Set RELATIVE TARGET PORT IDENTIFIER
*/
buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
buf[off++] = (port->sep_rtpi & 0xff);
buf[off++] = ((lun->lun_rtpi >> 8) & 0xff);
buf[off++] = (lun->lun_rtpi & 0xff);
rd_len += 4;
}
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
@ -259,15 +259,11 @@ target_emulate_report_target_port_groups(struct se_cmd *cmd)
* this CDB was received upon to determine this value individually
* for ALUA target port group.
*/
port = cmd->se_lun->lun_sep;
tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
if (tg_pt_gp_mem) {
spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
spin_lock(&cmd->se_lun->lun_tg_pt_gp_lock);
tg_pt_gp = cmd->se_lun->lun_tg_pt_gp;
if (tg_pt_gp)
buf[5] = tg_pt_gp->tg_pt_gp_implicit_trans_secs;
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
}
spin_unlock(&cmd->se_lun->lun_tg_pt_gp_lock);
}
transport_kunmap_data_sg(cmd);
@ -284,10 +280,9 @@ sense_reason_t
target_emulate_set_target_port_groups(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct se_port *port, *l_port = cmd->se_lun->lun_sep;
struct se_lun *l_lun = cmd->se_lun;
struct se_node_acl *nacl = cmd->se_sess->se_node_acl;
struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *l_tg_pt_gp_mem;
unsigned char *buf;
unsigned char *ptr;
sense_reason_t rc = TCM_NO_SENSE;
@ -295,9 +290,6 @@ target_emulate_set_target_port_groups(struct se_cmd *cmd)
int alua_access_state, primary = 0, valid_states;
u16 tg_pt_id, rtpi;
if (!l_port)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
if (cmd->data_length < 4) {
pr_warn("SET TARGET PORT GROUPS parameter list length %u too"
" small\n", cmd->data_length);
@ -312,29 +304,24 @@ target_emulate_set_target_port_groups(struct se_cmd *cmd)
* Determine if explicit ALUA via SET_TARGET_PORT_GROUPS is allowed
* for the local tg_pt_gp.
*/
l_tg_pt_gp_mem = l_port->sep_alua_tg_pt_gp_mem;
if (!l_tg_pt_gp_mem) {
pr_err("Unable to access l_port->sep_alua_tg_pt_gp_mem\n");
rc = TCM_UNSUPPORTED_SCSI_OPCODE;
goto out;
}
spin_lock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
l_tg_pt_gp = l_tg_pt_gp_mem->tg_pt_gp;
spin_lock(&l_lun->lun_tg_pt_gp_lock);
l_tg_pt_gp = l_lun->lun_tg_pt_gp;
if (!l_tg_pt_gp) {
spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
pr_err("Unable to access *l_tg_pt_gp_mem->tg_pt_gp\n");
spin_unlock(&l_lun->lun_tg_pt_gp_lock);
pr_err("Unable to access l_lun->tg_pt_gp\n");
rc = TCM_UNSUPPORTED_SCSI_OPCODE;
goto out;
}
spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) {
spin_unlock(&l_lun->lun_tg_pt_gp_lock);
pr_debug("Unable to process SET_TARGET_PORT_GROUPS"
" while TPGS_EXPLICIT_ALUA is disabled\n");
rc = TCM_UNSUPPORTED_SCSI_OPCODE;
goto out;
}
valid_states = l_tg_pt_gp->tg_pt_gp_alua_supported_states;
spin_unlock(&l_lun->lun_tg_pt_gp_lock);
ptr = &buf[4]; /* Skip over RESERVED area in header */
@ -396,7 +383,7 @@ target_emulate_set_target_port_groups(struct se_cmd *cmd)
spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
if (!core_alua_do_port_transition(tg_pt_gp,
dev, l_port, nacl,
dev, l_lun, nacl,
alua_access_state, 1))
found = true;
@ -406,6 +393,8 @@ target_emulate_set_target_port_groups(struct se_cmd *cmd)
}
spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
} else {
struct se_lun *lun;
/*
* Extract the RELATIVE TARGET PORT IDENTIFIER to identify
* the Target Port in question for the the incoming
@ -417,17 +406,16 @@ target_emulate_set_target_port_groups(struct se_cmd *cmd)
* for the struct se_device storage object.
*/
spin_lock(&dev->se_port_lock);
list_for_each_entry(port, &dev->dev_sep_list,
sep_list) {
if (port->sep_rtpi != rtpi)
list_for_each_entry(lun, &dev->dev_sep_list,
lun_dev_link) {
if (lun->lun_rtpi != rtpi)
continue;
tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
// XXX: racy unlock
spin_unlock(&dev->se_port_lock);
if (!core_alua_set_tg_pt_secondary_state(
tg_pt_gp_mem, port, 1, 1))
lun, 1, 1))
found = true;
spin_lock(&dev->se_port_lock);
@ -696,9 +684,7 @@ target_alua_state_check(struct se_cmd *cmd)
struct se_device *dev = cmd->se_dev;
unsigned char *cdb = cmd->t_task_cdb;
struct se_lun *lun = cmd->se_lun;
struct se_port *port = lun->lun_sep;
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
int out_alua_state, nonop_delay_msecs;
if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)
@ -706,33 +692,27 @@ target_alua_state_check(struct se_cmd *cmd)
if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
return 0;
if (!port)
return 0;
/*
* First, check for a struct se_port specific secondary ALUA target port
* access state: OFFLINE
*/
if (atomic_read(&port->sep_tg_pt_secondary_offline)) {
if (atomic_read(&lun->lun_tg_pt_secondary_offline)) {
pr_debug("ALUA: Got secondary offline status for local"
" target port\n");
set_ascq(cmd, ASCQ_04H_ALUA_OFFLINE);
return TCM_CHECK_CONDITION_NOT_READY;
}
/*
* Second, obtain the struct t10_alua_tg_pt_gp_member pointer to the
* ALUA target port group, to obtain current ALUA access state.
* Otherwise look for the underlying struct se_device association with
* a ALUA logical unit group.
*/
tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
if (!tg_pt_gp_mem)
if (!lun->lun_tg_pt_gp)
return 0;
spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
spin_lock(&lun->lun_tg_pt_gp_lock);
tg_pt_gp = lun->lun_tg_pt_gp;
out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state);
nonop_delay_msecs = tg_pt_gp->tg_pt_gp_nonop_delay_msecs;
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
// XXX: keeps using tg_pt_gp witout reference after unlock
spin_unlock(&lun->lun_tg_pt_gp_lock);
/*
* Process ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED in a separate conditional
* statement so the compiler knows explicitly to check this case first.
@ -764,7 +744,7 @@ target_alua_state_check(struct se_cmd *cmd)
break;
/*
* OFFLINE is a secondary ALUA target port group access state, that is
* handled above with struct se_port->sep_tg_pt_secondary_offline=1
* handled above with struct se_lun->lun_tg_pt_secondary_offline=1
*/
case ALUA_ACCESS_STATE_OFFLINE:
default:
@ -906,10 +886,6 @@ int core_alua_check_nonop_delay(
}
EXPORT_SYMBOL(core_alua_check_nonop_delay);
/*
* Called with tg_pt_gp->tg_pt_gp_md_mutex or tg_pt_gp_mem->sep_tg_pt_md_mutex
*
*/
static int core_alua_write_tpg_metadata(
const char *path,
unsigned char *md_buf,
@ -971,16 +947,14 @@ static void core_alua_do_transition_tg_pt_work(struct work_struct *work)
struct t10_alua_tg_pt_gp, tg_pt_gp_transition_work.work);
struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
struct se_dev_entry *se_deve;
struct se_lun *lun;
struct se_lun_acl *lacl;
struct se_port *port;
struct t10_alua_tg_pt_gp_member *mem;
bool explicit = (tg_pt_gp->tg_pt_gp_alua_access_status ==
ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG);
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
list_for_each_entry(mem, &tg_pt_gp->tg_pt_gp_mem_list,
tg_pt_gp_mem_list) {
port = mem->tg_pt;
list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
lun_tg_pt_gp_link) {
/*
* After an implicit target port asymmetric access state
* change, a device server shall establish a unit attention
@ -995,14 +969,13 @@ static void core_alua_do_transition_tg_pt_work(struct work_struct *work)
* every I_T nexus other than the I_T nexus on which the SET
* TARGET PORT GROUPS command
*/
atomic_inc_mb(&mem->tg_pt_gp_mem_ref_cnt);
atomic_inc_mb(&lun->lun_active);
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
spin_lock_bh(&port->sep_alua_lock);
list_for_each_entry(se_deve, &port->sep_alua_list,
alua_port_list) {
spin_lock_bh(&lun->lun_deve_lock);
list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) {
lacl = rcu_dereference_check(se_deve->se_lun_acl,
lockdep_is_held(&port->sep_alua_lock));
lockdep_is_held(&lun->lun_deve_lock));
/*
* se_deve->se_lun_acl pointer may be NULL for a
* entry created without explicit Node+MappedLUN ACLs
@ -1014,18 +987,18 @@ static void core_alua_do_transition_tg_pt_work(struct work_struct *work)
ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
(tg_pt_gp->tg_pt_gp_alua_nacl != NULL) &&
(tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl) &&
(tg_pt_gp->tg_pt_gp_alua_port != NULL) &&
(tg_pt_gp->tg_pt_gp_alua_port == port))
(tg_pt_gp->tg_pt_gp_alua_lun != NULL) &&
(tg_pt_gp->tg_pt_gp_alua_lun == lun))
continue;
core_scsi3_ua_allocate(lacl->se_lun_nacl,
se_deve->mapped_lun, 0x2A,
ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED);
}
spin_unlock_bh(&port->sep_alua_lock);
spin_unlock_bh(&lun->lun_deve_lock);
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
atomic_dec_mb(&mem->tg_pt_gp_mem_ref_cnt);
atomic_dec_mb(&lun->lun_active);
}
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
/*
@ -1143,7 +1116,7 @@ static int core_alua_do_transition_tg_pt(
int core_alua_do_port_transition(
struct t10_alua_tg_pt_gp *l_tg_pt_gp,
struct se_device *l_dev,
struct se_port *l_port,
struct se_lun *l_lun,
struct se_node_acl *l_nacl,
int new_state,
int explicit)
@ -1173,7 +1146,7 @@ int core_alua_do_port_transition(
* core_alua_do_transition_tg_pt() will always return
* success.
*/
l_tg_pt_gp->tg_pt_gp_alua_port = l_port;
l_tg_pt_gp->tg_pt_gp_alua_lun = l_lun;
l_tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl;
rc = core_alua_do_transition_tg_pt(l_tg_pt_gp,
new_state, explicit);
@ -1212,10 +1185,10 @@ int core_alua_do_port_transition(
continue;
if (l_tg_pt_gp == tg_pt_gp) {
tg_pt_gp->tg_pt_gp_alua_port = l_port;
tg_pt_gp->tg_pt_gp_alua_lun = l_lun;
tg_pt_gp->tg_pt_gp_alua_nacl = l_nacl;
} else {
tg_pt_gp->tg_pt_gp_alua_port = NULL;
tg_pt_gp->tg_pt_gp_alua_lun = NULL;
tg_pt_gp->tg_pt_gp_alua_nacl = NULL;
}
atomic_inc_mb(&tg_pt_gp->tg_pt_gp_ref_cnt);
@ -1252,22 +1225,20 @@ int core_alua_do_port_transition(
return rc;
}
/*
* Called with tg_pt_gp_mem->sep_tg_pt_md_mutex held
*/
static int core_alua_update_tpg_secondary_metadata(
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
struct se_port *port)
static int core_alua_update_tpg_secondary_metadata(struct se_lun *lun)
{
struct se_portal_group *se_tpg = lun->lun_tpg;
unsigned char *md_buf;
struct se_portal_group *se_tpg = port->sep_tpg;
char path[ALUA_METADATA_PATH_LEN], wwn[ALUA_SECONDARY_METADATA_WWN_LEN];
int len, rc;
mutex_lock(&lun->lun_tg_pt_md_mutex);
md_buf = kzalloc(ALUA_MD_BUF_LEN, GFP_KERNEL);
if (!md_buf) {
pr_err("Unable to allocate buf for ALUA metadata\n");
return -ENOMEM;
rc = -ENOMEM;
goto out_unlock;
}
memset(path, 0, ALUA_METADATA_PATH_LEN);
@ -1282,32 +1253,33 @@ static int core_alua_update_tpg_secondary_metadata(
len = snprintf(md_buf, ALUA_MD_BUF_LEN, "alua_tg_pt_offline=%d\n"
"alua_tg_pt_status=0x%02x\n",
atomic_read(&port->sep_tg_pt_secondary_offline),
port->sep_tg_pt_secondary_stat);
atomic_read(&lun->lun_tg_pt_secondary_offline),
lun->lun_tg_pt_secondary_stat);
snprintf(path, ALUA_METADATA_PATH_LEN, "/var/target/alua/%s/%s/lun_%u",
se_tpg->se_tpg_tfo->get_fabric_name(), wwn,
port->sep_lun->unpacked_lun);
lun->unpacked_lun);
rc = core_alua_write_tpg_metadata(path, md_buf, len);
kfree(md_buf);
out_unlock:
mutex_unlock(&lun->lun_tg_pt_md_mutex);
return rc;
}
static int core_alua_set_tg_pt_secondary_state(
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
struct se_port *port,
struct se_lun *lun,
int explicit,
int offline)
{
struct t10_alua_tg_pt_gp *tg_pt_gp;
int trans_delay_msecs;
spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
spin_lock(&lun->lun_tg_pt_gp_lock);
tg_pt_gp = lun->lun_tg_pt_gp;
if (!tg_pt_gp) {
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
spin_unlock(&lun->lun_tg_pt_gp_lock);
pr_err("Unable to complete secondary state"
" transition\n");
return -EINVAL;
@ -1315,14 +1287,14 @@ static int core_alua_set_tg_pt_secondary_state(
trans_delay_msecs = tg_pt_gp->tg_pt_gp_trans_delay_msecs;
/*
* Set the secondary ALUA target port access state to OFFLINE
* or release the previously secondary state for struct se_port
* or release the previously secondary state for struct se_lun
*/
if (offline)
atomic_set(&port->sep_tg_pt_secondary_offline, 1);
atomic_set(&lun->lun_tg_pt_secondary_offline, 1);
else
atomic_set(&port->sep_tg_pt_secondary_offline, 0);
atomic_set(&lun->lun_tg_pt_secondary_offline, 0);
port->sep_tg_pt_secondary_stat = (explicit) ?
lun->lun_tg_pt_secondary_stat = (explicit) ?
ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG :
ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA;
@ -1331,7 +1303,7 @@ static int core_alua_set_tg_pt_secondary_state(
"implicit", config_item_name(&tg_pt_gp->tg_pt_gp_group.cg_item),
tg_pt_gp->tg_pt_gp_id, (offline) ? "OFFLINE" : "ONLINE");
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
spin_unlock(&lun->lun_tg_pt_gp_lock);
/*
* Do the optional transition delay after we set the secondary
* ALUA access state.
@ -1342,11 +1314,8 @@ static int core_alua_set_tg_pt_secondary_state(
* See if we need to update the ALUA fabric port metadata for
* secondary state and status
*/
if (port->sep_tg_pt_secondary_write_md) {
mutex_lock(&port->sep_tg_pt_md_mutex);
core_alua_update_tpg_secondary_metadata(tg_pt_gp_mem, port);
mutex_unlock(&port->sep_tg_pt_md_mutex);
}
if (lun->lun_tg_pt_secondary_write_md)
core_alua_update_tpg_secondary_metadata(lun);
return 0;
}
@ -1700,7 +1669,7 @@ struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev,
return NULL;
}
INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_list);
INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_mem_list);
INIT_LIST_HEAD(&tg_pt_gp->tg_pt_gp_lun_list);
mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex);
spin_lock_init(&tg_pt_gp->tg_pt_gp_lock);
atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0);
@ -1794,32 +1763,11 @@ int core_alua_set_tg_pt_gp_id(
return 0;
}
struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
struct se_port *port)
{
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
tg_pt_gp_mem = kmem_cache_zalloc(t10_alua_tg_pt_gp_mem_cache,
GFP_KERNEL);
if (!tg_pt_gp_mem) {
pr_err("Unable to allocate struct t10_alua_tg_pt_gp_member\n");
return ERR_PTR(-ENOMEM);
}
INIT_LIST_HEAD(&tg_pt_gp_mem->tg_pt_gp_mem_list);
spin_lock_init(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
atomic_set(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt, 0);
tg_pt_gp_mem->tg_pt = port;
port->sep_alua_tg_pt_gp_mem = tg_pt_gp_mem;
return tg_pt_gp_mem;
}
void core_alua_free_tg_pt_gp(
struct t10_alua_tg_pt_gp *tg_pt_gp)
{
struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *tg_pt_gp_mem_tmp;
struct se_lun *lun, *next;
/*
* Once we have reached this point, config_item_put() has already
@ -1850,30 +1798,24 @@ void core_alua_free_tg_pt_gp(
* struct se_port.
*/
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
list_for_each_entry_safe(tg_pt_gp_mem, tg_pt_gp_mem_tmp,
&tg_pt_gp->tg_pt_gp_mem_list, tg_pt_gp_mem_list) {
if (tg_pt_gp_mem->tg_pt_gp_assoc) {
list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list);
list_for_each_entry_safe(lun, next,
&tg_pt_gp->tg_pt_gp_lun_list, lun_tg_pt_gp_link) {
list_del_init(&lun->lun_tg_pt_gp_link);
tg_pt_gp->tg_pt_gp_members--;
tg_pt_gp_mem->tg_pt_gp_assoc = 0;
}
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
/*
* tg_pt_gp_mem is associated with a single
* se_port->sep_alua_tg_pt_gp_mem, and is released via
* core_alua_free_tg_pt_gp_mem().
*
* If the passed tg_pt_gp does NOT match the default_tg_pt_gp,
* assume we want to re-associate a given tg_pt_gp_mem with
* default_tg_pt_gp.
*/
spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
spin_lock(&lun->lun_tg_pt_gp_lock);
if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) {
__core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
__target_attach_tg_pt_gp(lun,
dev->t10_alua.default_tg_pt_gp);
} else
tg_pt_gp_mem->tg_pt_gp = NULL;
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
lun->lun_tg_pt_gp = NULL;
spin_unlock(&lun->lun_tg_pt_gp_lock);
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
}
@ -1882,35 +1824,6 @@ void core_alua_free_tg_pt_gp(
kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp);
}
void core_alua_free_tg_pt_gp_mem(struct se_port *port)
{
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
if (!tg_pt_gp_mem)
return;
while (atomic_read(&tg_pt_gp_mem->tg_pt_gp_mem_ref_cnt))
cpu_relax();
spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
if (tg_pt_gp) {
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
if (tg_pt_gp_mem->tg_pt_gp_assoc) {
list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list);
tg_pt_gp->tg_pt_gp_members--;
tg_pt_gp_mem->tg_pt_gp_assoc = 0;
}
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
tg_pt_gp_mem->tg_pt_gp = NULL;
}
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
kmem_cache_free(t10_alua_tg_pt_gp_mem_cache, tg_pt_gp_mem);
}
static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name(
struct se_device *dev, const char *name)
{
@ -1944,50 +1857,58 @@ static void core_alua_put_tg_pt_gp_from_name(
spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
}
/*
* Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held
*/
void __core_alua_attach_tg_pt_gp_mem(
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
static void __target_attach_tg_pt_gp(struct se_lun *lun,
struct t10_alua_tg_pt_gp *tg_pt_gp)
{
assert_spin_locked(&lun->lun_tg_pt_gp_lock);
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
tg_pt_gp_mem->tg_pt_gp = tg_pt_gp;
tg_pt_gp_mem->tg_pt_gp_assoc = 1;
list_add_tail(&tg_pt_gp_mem->tg_pt_gp_mem_list,
&tg_pt_gp->tg_pt_gp_mem_list);
lun->lun_tg_pt_gp = tg_pt_gp;
list_add_tail(&lun->lun_tg_pt_gp_link, &tg_pt_gp->tg_pt_gp_lun_list);
tg_pt_gp->tg_pt_gp_members++;
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
}
/*
* Called with struct t10_alua_tg_pt_gp_member->tg_pt_gp_mem_lock held
*/
static void __core_alua_drop_tg_pt_gp_mem(
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
void target_attach_tg_pt_gp(struct se_lun *lun,
struct t10_alua_tg_pt_gp *tg_pt_gp)
{
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
list_del(&tg_pt_gp_mem->tg_pt_gp_mem_list);
tg_pt_gp_mem->tg_pt_gp = NULL;
tg_pt_gp_mem->tg_pt_gp_assoc = 0;
tg_pt_gp->tg_pt_gp_members--;
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
spin_lock(&lun->lun_tg_pt_gp_lock);
__target_attach_tg_pt_gp(lun, tg_pt_gp);
spin_unlock(&lun->lun_tg_pt_gp_lock);
}
ssize_t core_alua_show_tg_pt_gp_info(struct se_port *port, char *page)
static void __target_detach_tg_pt_gp(struct se_lun *lun,
struct t10_alua_tg_pt_gp *tg_pt_gp)
{
assert_spin_locked(&lun->lun_tg_pt_gp_lock);
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
list_del_init(&lun->lun_tg_pt_gp_link);
tg_pt_gp->tg_pt_gp_members--;
spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
lun->lun_tg_pt_gp = NULL;
}
void target_detach_tg_pt_gp(struct se_lun *lun)
{
struct t10_alua_tg_pt_gp *tg_pt_gp;
spin_lock(&lun->lun_tg_pt_gp_lock);
tg_pt_gp = lun->lun_tg_pt_gp;
if (tg_pt_gp)
__target_detach_tg_pt_gp(lun, tg_pt_gp);
spin_unlock(&lun->lun_tg_pt_gp_lock);
}
ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *lun, char *page)
{
struct config_item *tg_pt_ci;
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
ssize_t len = 0;
tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
if (!tg_pt_gp_mem)
return len;
spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
spin_lock(&lun->lun_tg_pt_gp_lock);
tg_pt_gp = lun->lun_tg_pt_gp;
if (tg_pt_gp) {
tg_pt_ci = &tg_pt_gp->tg_pt_gp_group.cg_item;
len += sprintf(page, "TG Port Alias: %s\nTG Port Group ID:"
@ -1999,34 +1920,29 @@ ssize_t core_alua_show_tg_pt_gp_info(struct se_port *port, char *page)
&tg_pt_gp->tg_pt_gp_alua_access_state)),
core_alua_dump_status(
tg_pt_gp->tg_pt_gp_alua_access_status),
(atomic_read(&port->sep_tg_pt_secondary_offline)) ?
atomic_read(&lun->lun_tg_pt_secondary_offline) ?
"Offline" : "None",
core_alua_dump_status(port->sep_tg_pt_secondary_stat));
core_alua_dump_status(lun->lun_tg_pt_secondary_stat));
}
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
spin_unlock(&lun->lun_tg_pt_gp_lock);
return len;
}
ssize_t core_alua_store_tg_pt_gp_info(
struct se_port *port,
struct se_lun *lun,
const char *page,
size_t count)
{
struct se_portal_group *tpg;
struct se_lun *lun;
struct se_device *dev = port->sep_lun->lun_se_dev;
struct se_portal_group *tpg = lun->lun_tpg;
struct se_device *dev = lun->lun_se_dev;
struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
unsigned char buf[TG_PT_GROUP_NAME_BUF];
int move = 0;
tpg = port->sep_tpg;
lun = port->sep_lun;
tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
if (!tg_pt_gp_mem)
return 0;
if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH ||
(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE))
return -ENODEV;
if (count > TG_PT_GROUP_NAME_BUF) {
pr_err("ALUA Target Port Group alias too large!\n");
@ -2050,8 +1966,8 @@ ssize_t core_alua_store_tg_pt_gp_info(
return -ENODEV;
}
spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
spin_lock(&lun->lun_tg_pt_gp_lock);
tg_pt_gp = lun->lun_tg_pt_gp;
if (tg_pt_gp) {
/*
* Clearing an existing tg_pt_gp association, and replacing
@ -2069,24 +1985,19 @@ ssize_t core_alua_store_tg_pt_gp_info(
&tg_pt_gp->tg_pt_gp_group.cg_item),
tg_pt_gp->tg_pt_gp_id);
__core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp);
__core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
__target_detach_tg_pt_gp(lun, tg_pt_gp);
__target_attach_tg_pt_gp(lun,
dev->t10_alua.default_tg_pt_gp);
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
spin_unlock(&lun->lun_tg_pt_gp_lock);
return count;
}
/*
* Removing existing association of tg_pt_gp_mem with tg_pt_gp
*/
__core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp);
__target_detach_tg_pt_gp(lun, tg_pt_gp);
move = 1;
}
/*
* Associate tg_pt_gp_mem with tg_pt_gp_new.
*/
__core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp_new);
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
__target_attach_tg_pt_gp(lun, tg_pt_gp_new);
spin_unlock(&lun->lun_tg_pt_gp_lock);
pr_debug("Target_Core_ConfigFS: %s %s/tpgt_%hu/%s to ALUA"
" Target Port Group: alua/%s, ID: %hu\n", (move) ?
"Moving" : "Adding", tpg->se_tpg_tfo->tpg_get_wwn(tpg),
@ -2269,11 +2180,8 @@ ssize_t core_alua_store_preferred_bit(
ssize_t core_alua_show_offline_bit(struct se_lun *lun, char *page)
{
if (!lun->lun_sep)
return -ENODEV;
return sprintf(page, "%d\n",
atomic_read(&lun->lun_sep->sep_tg_pt_secondary_offline));
atomic_read(&lun->lun_tg_pt_secondary_offline));
}
ssize_t core_alua_store_offline_bit(
@ -2281,11 +2189,12 @@ ssize_t core_alua_store_offline_bit(
const char *page,
size_t count)
{
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
struct se_device *dev = lun->lun_se_dev;
unsigned long tmp;
int ret;
if (!lun->lun_sep)
if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH ||
(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE))
return -ENODEV;
ret = kstrtoul(page, 0, &tmp);
@ -2298,14 +2207,8 @@ ssize_t core_alua_store_offline_bit(
tmp);
return -EINVAL;
}
tg_pt_gp_mem = lun->lun_sep->sep_alua_tg_pt_gp_mem;
if (!tg_pt_gp_mem) {
pr_err("Unable to locate *tg_pt_gp_mem\n");
return -EINVAL;
}
ret = core_alua_set_tg_pt_secondary_state(tg_pt_gp_mem,
lun->lun_sep, 0, (int)tmp);
ret = core_alua_set_tg_pt_secondary_state(lun, 0, (int)tmp);
if (ret < 0)
return -EINVAL;
@ -2316,7 +2219,7 @@ ssize_t core_alua_show_secondary_status(
struct se_lun *lun,
char *page)
{
return sprintf(page, "%d\n", lun->lun_sep->sep_tg_pt_secondary_stat);
return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_stat);
}
ssize_t core_alua_store_secondary_status(
@ -2339,7 +2242,7 @@ ssize_t core_alua_store_secondary_status(
tmp);
return -EINVAL;
}
lun->lun_sep->sep_tg_pt_secondary_stat = (int)tmp;
lun->lun_tg_pt_secondary_stat = (int)tmp;
return count;
}
@ -2348,8 +2251,7 @@ ssize_t core_alua_show_secondary_write_metadata(
struct se_lun *lun,
char *page)
{
return sprintf(page, "%d\n",
lun->lun_sep->sep_tg_pt_secondary_write_md);
return sprintf(page, "%d\n", lun->lun_tg_pt_secondary_write_md);
}
ssize_t core_alua_store_secondary_write_metadata(
@ -2370,7 +2272,7 @@ ssize_t core_alua_store_secondary_write_metadata(
" %lu\n", tmp);
return -EINVAL;
}
lun->lun_sep->sep_tg_pt_secondary_write_md = (int)tmp;
lun->lun_tg_pt_secondary_write_md = (int)tmp;
return count;
}

14
drivers/target/target_core_alua.h
View file

@ -85,7 +85,6 @@
extern struct kmem_cache *t10_alua_lu_gp_cache;
extern struct kmem_cache *t10_alua_lu_gp_mem_cache;
extern struct kmem_cache *t10_alua_tg_pt_gp_cache;
extern struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
extern struct kmem_cache *t10_alua_lba_map_cache;
extern struct kmem_cache *t10_alua_lba_map_mem_cache;
@ -94,7 +93,7 @@ extern sense_reason_t target_emulate_set_target_port_groups(struct se_cmd *);
extern sense_reason_t target_emulate_report_referrals(struct se_cmd *);
extern int core_alua_check_nonop_delay(struct se_cmd *);
extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *,
struct se_device *, struct se_port *,
struct se_device *, struct se_lun *,
struct se_node_acl *, int, int);
extern char *core_alua_dump_status(int);
extern struct t10_alua_lba_map *core_alua_allocate_lba_map(
@ -117,14 +116,11 @@ extern void core_alua_drop_lu_gp_dev(struct se_device *);
extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
struct se_device *, const char *, int);
extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16);
extern struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
struct se_port *);
extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *);
extern void core_alua_free_tg_pt_gp_mem(struct se_port *);
extern void __core_alua_attach_tg_pt_gp_mem(struct t10_alua_tg_pt_gp_member *,
struct t10_alua_tg_pt_gp *);
extern ssize_t core_alua_show_tg_pt_gp_info(struct se_port *, char *);
extern ssize_t core_alua_store_tg_pt_gp_info(struct se_port *, const char *,
extern void target_detach_tg_pt_gp(struct se_lun *);
extern void target_attach_tg_pt_gp(struct se_lun *, struct t10_alua_tg_pt_gp *);
extern ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *, char *);
extern ssize_t core_alua_store_tg_pt_gp_info(struct se_lun *, const char *,
size_t);
extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *);
extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *,

11
drivers/target/target_core_configfs.c
View file

@ -2889,21 +2889,16 @@ static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
struct t10_alua_tg_pt_gp *tg_pt_gp,
char *page)
{
struct se_port *port;
struct se_portal_group *tpg;
struct se_lun *lun;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
ssize_t len = 0, cur_len;
unsigned char buf[TG_PT_GROUP_NAME_BUF];
memset(buf, 0, TG_PT_GROUP_NAME_BUF);
spin_lock(&tg_pt_gp->tg_pt_gp_lock);
list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
tg_pt_gp_mem_list) {
port = tg_pt_gp_mem->tg_pt;
tpg = port->sep_tpg;
lun = port->sep_lun;
list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
lun_tg_pt_gp_link) {
struct se_portal_group *tpg = lun->lun_tpg;
cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
"/%s\n", tpg->se_tpg_tfo->get_fabric_name(),

179
drivers/target/target_core_device.c
View file

@ -120,8 +120,8 @@ transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
(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;
@ -309,7 +309,6 @@ int core_enable_device_list_for_node(
struct se_node_acl *nacl,
struct se_portal_group *tpg)
{
struct se_port *port = lun->lun_sep;
struct se_dev_entry *orig, *new;
new = kzalloc(sizeof(*new), GFP_KERNEL);
@ -320,8 +319,8 @@ int core_enable_device_list_for_node(
atomic_set(&new->ua_count, 0);
spin_lock_init(&new->ua_lock);
INIT_LIST_HEAD(&new->alua_port_list);
INIT_LIST_HEAD(&new->ua_list);
INIT_LIST_HEAD(&new->lun_link);
new->mapped_lun = mapped_lun;
kref_init(&new->pr_kref);
@ -357,10 +356,10 @@ int core_enable_device_list_for_node(
hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist);
mutex_unlock(&nacl->lun_entry_mutex);
spin_lock_bh(&port->sep_alua_lock);
list_del(&orig->alua_port_list);
list_add_tail(&new->alua_port_list, &port->sep_alua_list);
spin_unlock_bh(&port->sep_alua_lock);
spin_lock_bh(&lun->lun_deve_lock);
list_del(&orig->lun_link);
list_add_tail(&new->lun_link, &lun->lun_deve_list);
spin_unlock_bh(&lun->lun_deve_lock);
kref_put(&orig->pr_kref, target_pr_kref_release);
wait_for_completion(&orig->pr_comp);
@ -374,9 +373,9 @@ int core_enable_device_list_for_node(
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(&new->alua_port_list, &port->sep_alua_list);
spin_unlock_bh(&port->sep_alua_lock);
spin_lock_bh(&lun->lun_deve_lock);
list_add_tail(&new->lun_link, &lun->lun_deve_list);
spin_unlock_bh(&lun->lun_deve_lock);
return 0;
}
@ -390,23 +389,22 @@ void core_disable_device_list_for_node(
struct se_node_acl *nacl,
struct se_portal_group *tpg)
{
struct se_port *port = lun->lun_sep;
/*
* 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(&orig->alua_port_list);
spin_unlock_bh(&port->sep_alua_lock);
spin_lock_bh(&lun->lun_deve_lock);
list_del(&orig->lun_link);
spin_unlock_bh(&lun->lun_deve_lock);
/*
* Disable struct se_dev_entry LUN ACL mapping
*/
@ -458,27 +456,16 @@ void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
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:
/*
@ -493,135 +480,23 @@ static struct se_port *core_alloc_port(struct se_device *dev)
* 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_index = dev->dev_index;
lun->lun_se_dev = dev;
lun->lun_rtpi = port->sep_rtpi;
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;
@ -783,10 +658,10 @@ int core_dev_add_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;
@ -930,6 +805,10 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
xcopy_lun->lun_se_dev = dev;
spin_lock_init(&xcopy_lun->lun_sep_lock);
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;
}

32
drivers/target/target_core_fabric_configfs.c
View file

@ -91,12 +91,11 @@ static int target_fabric_mappedlun_link(
/*
* Ensure that the source port exists
*/
if (!lun->lun_sep || !lun->lun_sep->sep_tpg) {
pr_err("Source se_lun->lun_sep or lun->lun_sep->sep"
"_tpg does not exist\n");
if (!lun->lun_se_dev) {
pr_err("Source se_lun->lun_se_dev does not exist\n");
return -EINVAL;
}
se_tpg = lun->lun_sep->sep_tpg;
se_tpg = lun->lun_tpg;
nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
tpg_ci = &nacl_ci->ci_group->cg_item;
@ -150,9 +149,8 @@ static int target_fabric_mappedlun_unlink(
struct se_lun_acl, se_lun_group);
struct se_lun *lun = container_of(to_config_group(lun_ci),
struct se_lun, lun_group);
struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
return core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
return core_dev_del_initiator_node_lun_acl(lun, lacl);
}
CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
@ -643,10 +641,10 @@ static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
struct se_lun *lun,
char *page)
{
if (!lun || !lun->lun_sep)
if (!lun || !lun->lun_se_dev)
return -ENODEV;
return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
return core_alua_show_tg_pt_gp_info(lun, page);
}
static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
@ -654,10 +652,10 @@ static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
const char *page,
size_t count)
{
if (!lun || !lun->lun_sep)
if (!lun || !lun->lun_se_dev)
return -ENODEV;
return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
return core_alua_store_tg_pt_gp_info(lun, page, count);
}
TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
@ -669,7 +667,7 @@ static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
struct se_lun *lun,
char *page)
{
if (!lun || !lun->lun_sep)
if (!lun || !lun->lun_se_dev)
return -ENODEV;
return core_alua_show_offline_bit(lun, page);
@ -680,7 +678,7 @@ static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
const char *page,
size_t count)
{
if (!lun || !lun->lun_sep)
if (!lun || !lun->lun_se_dev)
return -ENODEV;
return core_alua_store_offline_bit(lun, page, count);
@ -695,7 +693,7 @@ static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
struct se_lun *lun,
char *page)
{
if (!lun || !lun->lun_sep)
if (!lun || !lun->lun_se_dev)
return -ENODEV;
return core_alua_show_secondary_status(lun, page);
@ -706,7 +704,7 @@ static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
const char *page,
size_t count)
{
if (!lun || !lun->lun_sep)
if (!lun || !lun->lun_se_dev)
return -ENODEV;
return core_alua_store_secondary_status(lun, page, count);
@ -721,7 +719,7 @@ static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
struct se_lun *lun,
char *page)
{
if (!lun || !lun->lun_sep)
if (!lun || !lun->lun_se_dev)
return -ENODEV;
return core_alua_show_secondary_write_metadata(lun, page);
@ -732,7 +730,7 @@ static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
const char *page,
size_t count)
{
if (!lun || !lun->lun_sep)
if (!lun || !lun->lun_se_dev)
return -ENODEV;
return core_alua_store_secondary_write_metadata(lun, page, count);
@ -811,7 +809,7 @@ static int target_fabric_port_unlink(
{
struct se_lun *lun = container_of(to_config_group(lun_ci),
struct se_lun, lun_group);
struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
struct se_portal_group *se_tpg = lun->lun_tpg;
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
if (tf->tf_ops->fabric_pre_unlink) {

12
drivers/target/target_core_internal.h
View file

@ -21,6 +21,7 @@ extern struct t10_alua_lu_gp *default_lu_gp;
extern struct mutex g_device_mutex;
extern struct list_head g_device_list;
int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev);
struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16);
void target_pr_kref_release(struct kref *);
void core_free_device_list_for_node(struct se_node_acl *,
@ -32,10 +33,6 @@ int core_enable_device_list_for_node(struct se_lun *, struct se_lun_acl *,
void core_disable_device_list_for_node(struct se_lun *, struct se_dev_entry *,
struct se_node_acl *, struct se_portal_group *);
void core_clear_lun_from_tpg(struct se_lun *, struct se_portal_group *);
int core_dev_export(struct se_device *, struct se_portal_group *,
struct se_lun *);
void core_dev_unexport(struct se_device *, struct se_portal_group *,
struct se_lun *);
int core_dev_add_lun(struct se_portal_group *, struct se_device *,
struct se_lun *lun);
void core_dev_del_lun(struct se_portal_group *, struct se_lun *);
@ -43,8 +40,8 @@ struct se_lun_acl *core_dev_init_initiator_node_lun_acl(struct se_portal_group *
struct se_node_acl *, u32, int *);
int core_dev_add_initiator_node_lun_acl(struct se_portal_group *,
struct se_lun_acl *, struct se_lun *lun, u32);
int core_dev_del_initiator_node_lun_acl(struct se_portal_group *,
struct se_lun *, struct se_lun_acl *);
int core_dev_del_initiator_node_lun_acl(struct se_lun *,
struct se_lun_acl *);
void core_dev_free_initiator_node_lun_acl(struct se_portal_group *,
struct se_lun_acl *lacl);
int core_dev_setup_virtual_lun0(void);
@ -120,4 +117,7 @@ void target_stat_setup_dev_default_groups(struct se_device *);
void target_stat_setup_port_default_groups(struct se_lun *);
void target_stat_setup_mappedlun_default_groups(struct se_lun_acl *);
/* target_core_xcopy.c */
extern struct se_portal_group xcopy_pt_tpg;
#endif /* TARGET_CORE_INTERNAL_H */

56
drivers/target/target_core_pr.c
View file

@ -642,7 +642,7 @@ static struct t10_pr_registration *__core_scsi3_do_alloc_registration(
pr_reg->pr_reg_deve = deve;
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_sep->sep_rtpi;
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;
@ -680,8 +680,7 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration(
struct se_dev_entry *deve_tmp;
struct se_node_acl *nacl_tmp;
struct se_lun_acl *lacl_tmp;
struct se_lun *lun_tmp;
struct se_port *port, *port_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;
@ -704,13 +703,12 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration(
* 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
@ -720,7 +718,7 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration(
continue;
lacl_tmp = rcu_dereference_check(deve_tmp->se_lun_acl,
lockdep_is_held(&port->sep_alua_lock));
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
@ -742,7 +740,7 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration(
continue;
kref_get(&deve_tmp->pr_kref);
spin_unlock_bh(&port->sep_alua_lock);
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
@ -753,7 +751,7 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration(
if (ret < 0) {
pr_err("core_scsi3_lunacl_depend"
"_item() failed\n");
atomic_dec_mb(&port->sep_tg_pt_ref_cnt);
atomic_dec_mb(&lun->lun_active);
kref_put(&deve_tmp->pr_kref, target_pr_kref_release);
goto out;
}
@ -764,27 +762,27 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration(
* the original *pr_reg is processed in
* __core_scsi3_add_registration()
*/
lun_tmp = rcu_dereference_check(deve_tmp->se_lun,
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, lun_tmp, deve_tmp,
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(&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);
@ -938,7 +936,7 @@ static int __core_scsi3_check_aptpl_registration(
(pr_reg->pr_aptpl_target_lun == target_lun)) {
pr_reg->pr_reg_nacl = nacl;
pr_reg->tg_pt_sep_rtpi = lun->lun_sep->sep_rtpi;
pr_reg->tg_pt_sep_rtpi = lun->lun_rtpi;
list_del(&pr_reg->pr_reg_aptpl_list);
spin_unlock(&pr_tmpl->aptpl_reg_lock);
@ -1465,7 +1463,6 @@ core_scsi3_decode_spec_i_port(
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;
@ -1550,16 +1547,14 @@ core_scsi3_decode_spec_i_port(
ptr = &buf[28];
while (tpdl > 0) {
struct se_lun *dest_lun;
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;
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
@ -1567,7 +1562,7 @@ core_scsi3_decode_spec_i_port(
*/
if (tmp_tpg->proto_id != proto_ident)
continue;
dest_rtpi = tmp_port->sep_rtpi;
dest_rtpi = tmp_lun->lun_rtpi;
i_str = target_parse_pr_out_transport_id(tmp_tpg,
(const char *)ptr, &tid_len, &iport_ptr);
@ -3119,9 +3114,8 @@ core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key,
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;
const struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops;
struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg;
@ -3206,12 +3200,10 @@ core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key,
}
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;

48
drivers/target/target_core_spc.c
View file

@ -37,10 +37,9 @@
#include "target_core_ua.h"
#include "target_core_xcopy.h"
static void spc_fill_alua_data(struct se_port *port, unsigned char *buf)
static void spc_fill_alua_data(struct se_lun *lun, unsigned char *buf)
{
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
/*
* Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS.
@ -53,17 +52,11 @@ static void spc_fill_alua_data(struct se_port *port, unsigned char *buf)
*
* See spc4r17 section 6.4.2 Table 135
*/
if (!port)
return;
tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
if (!tg_pt_gp_mem)
return;
spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
spin_lock(&lun->lun_tg_pt_gp_lock);
tg_pt_gp = lun->lun_tg_pt_gp;
if (tg_pt_gp)
buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type;
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
spin_unlock(&lun->lun_tg_pt_gp_lock);
}
sense_reason_t
@ -94,7 +87,7 @@ spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
/*
* Enable SCCS and TPGS fields for Emulated ALUA
*/
spc_fill_alua_data(lun->lun_sep, buf);
spc_fill_alua_data(lun, buf);
/*
* Set Third-Party Copy (3PC) bit to indicate support for EXTENDED_COPY
@ -181,11 +174,9 @@ spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
{
struct se_device *dev = cmd->se_dev;
struct se_lun *lun = cmd->se_lun;
struct se_port *port = NULL;
struct se_portal_group *tpg = NULL;
struct t10_alua_lu_gp_member *lu_gp_mem;
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
unsigned char *prod = &dev->t10_wwn.model[0];
u32 prod_len;
u32 unit_serial_len, off = 0;
@ -267,18 +258,15 @@ spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
/* Header size for Designation descriptor */
len += (id_len + 4);
off += (id_len + 4);
/*
* struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD
*/
port = lun->lun_sep;
if (port) {
if (1) {
struct t10_alua_lu_gp *lu_gp;
u32 padding, scsi_name_len, scsi_target_len;
u16 lu_gp_id = 0;
u16 tg_pt_gp_id = 0;
u16 tpgt;
tpg = port->sep_tpg;
tpg = lun->lun_tpg;
/*
* Relative target port identifer, see spc4r17
* section 7.7.3.7
@ -298,8 +286,8 @@ spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
/* Skip over Obsolete field in RTPI payload
* in Table 472 */
off += 2;
buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
buf[off++] = (port->sep_rtpi & 0xff);
buf[off++] = ((lun->lun_rtpi >> 8) & 0xff);
buf[off++] = (lun->lun_rtpi & 0xff);
len += 8; /* Header size + Designation descriptor */
/*
* Target port group identifier, see spc4r17
@ -308,18 +296,14 @@ spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
* Get the PROTOCOL IDENTIFIER as defined by spc4r17
* section 7.5.1 Table 362
*/
tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
if (!tg_pt_gp_mem)
goto check_lu_gp;
spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
spin_lock(&lun->lun_tg_pt_gp_lock);
tg_pt_gp = lun->lun_tg_pt_gp;
if (!tg_pt_gp) {
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
spin_unlock(&lun->lun_tg_pt_gp_lock);
goto check_lu_gp;
}
tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id;
spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
spin_unlock(&lun->lun_tg_pt_gp_lock);
buf[off] = tpg->proto_id << 4;
buf[off++] |= 0x1; /* CODE SET == Binary */
@ -694,7 +678,7 @@ static sense_reason_t
spc_emulate_inquiry(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg;
struct se_portal_group *tpg = cmd->se_lun->lun_tpg;
unsigned char *rbuf;
unsigned char *cdb = cmd->t_task_cdb;
unsigned char *buf;
@ -708,7 +692,7 @@ spc_emulate_inquiry(struct se_cmd *cmd)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
if (dev == tpg->tpg_virt_lun0.lun_se_dev)
if (dev == tpg->tpg_virt_lun0->lun_se_dev)
buf[0] = 0x3f; /* Not connected */
else
buf[0] = dev->transport->get_device_type(dev);

259
drivers/target/target_core_stat.c
View file

@ -106,7 +106,7 @@ static ssize_t target_stat_scsi_dev_show_attr_ports(
struct se_device *dev =
container_of(sgrps, struct se_device, dev_stat_grps);
return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_port_count);
return snprintf(page, PAGE_SIZE, "%u\n", dev->export_count);
}
DEV_STAT_SCSI_DEV_ATTR_RO(ports);
@ -542,19 +542,13 @@ static ssize_t target_stat_scsi_port_show_attr_inst(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
struct se_device *dev = lun->lun_se_dev;
struct se_hba *hba;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
hba = dev->se_hba;
ret = snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n", dev->se_hba->hba_index);
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -564,16 +558,12 @@ static ssize_t target_stat_scsi_port_show_attr_dev(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
struct se_device *dev = lun->lun_se_dev;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
spin_unlock(&lun->lun_sep_lock);
return ret;
@ -584,16 +574,13 @@ static ssize_t target_stat_scsi_port_show_attr_indx(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
ret = snprintf(page, PAGE_SIZE, "%u\n", sep->sep_index);
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n", lun->lun_rtpi);
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -603,19 +590,12 @@ static ssize_t target_stat_scsi_port_show_attr_role(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_device *dev = lun->lun_se_dev;
struct se_port *sep;
ssize_t ret;
if (!dev)
return -ENODEV;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%s%u\n", "Device", dev->dev_index);
spin_unlock(&lun->lun_sep_lock);
return ret;
@ -626,17 +606,15 @@ static ssize_t target_stat_scsi_port_show_attr_busy_count(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
dev = lun->lun_se_dev;
if (dev) {
/* FIXME: scsiPortBusyStatuses */
ret = snprintf(page, PAGE_SIZE, "%u\n", 0);
}
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -685,19 +663,13 @@ static ssize_t target_stat_scsi_tgt_port_show_attr_inst(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_device *dev = lun->lun_se_dev;
struct se_port *sep;
struct se_hba *hba;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
hba = dev->se_hba;
ret = snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n", dev->se_hba->hba_index);
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -707,16 +679,12 @@ static ssize_t target_stat_scsi_tgt_port_show_attr_dev(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_device *dev = lun->lun_se_dev;
struct se_port *sep;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
spin_unlock(&lun->lun_sep_lock);
return ret;
@ -727,16 +695,13 @@ static ssize_t target_stat_scsi_tgt_port_show_attr_indx(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
ret = snprintf(page, PAGE_SIZE, "%u\n", sep->sep_index);
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n", lun->lun_rtpi);
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -746,20 +711,16 @@ static ssize_t target_stat_scsi_tgt_port_show_attr_name(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
struct se_portal_group *tpg;
ssize_t ret;
struct se_portal_group *tpg = lun->lun_tpg;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
tpg = sep->sep_tpg;
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%sPort#%u\n",
tpg->se_tpg_tfo->get_fabric_name(), sep->sep_index);
tpg->se_tpg_tfo->get_fabric_name(),
lun->lun_rtpi);
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -769,18 +730,13 @@ static ssize_t target_stat_scsi_tgt_port_show_attr_port_index(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
struct se_portal_group *tpg;
ssize_t ret;
struct se_portal_group *tpg = lun->lun_tpg;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
tpg = sep->sep_tpg;
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%s%s%d\n",
tpg->se_tpg_tfo->tpg_get_wwn(tpg), "+t+",
tpg->se_tpg_tfo->tpg_get_tag(tpg));
@ -793,17 +749,13 @@ static ssize_t target_stat_scsi_tgt_port_show_attr_in_cmds(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
ret = snprintf(page, PAGE_SIZE, "%llu\n", sep->sep_stats.cmd_pdus);
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n", lun->lun_stats.cmd_pdus);
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -813,18 +765,14 @@ static ssize_t target_stat_scsi_tgt_port_show_attr_write_mbytes(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n",
(u32)(sep->sep_stats.rx_data_octets >> 20));
(u32)(lun->lun_stats.rx_data_octets >> 20));
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -834,18 +782,14 @@ static ssize_t target_stat_scsi_tgt_port_show_attr_read_mbytes(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n",
(u32)(sep->sep_stats.tx_data_octets >> 20));
(u32)(lun->lun_stats.tx_data_octets >> 20));
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -855,18 +799,15 @@ static ssize_t target_stat_scsi_tgt_port_show_attr_hs_in_cmds(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
dev = lun->lun_se_dev;
if (dev) {
/* FIXME: scsiTgtPortHsInCommands */
ret = snprintf(page, PAGE_SIZE, "%u\n", 0);
}
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -921,20 +862,13 @@ static ssize_t target_stat_scsi_transport_show_attr_inst(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_device *dev = lun->lun_se_dev;
struct se_port *sep;
struct se_hba *hba;
ssize_t ret;
struct se_device *dev;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
hba = dev->se_hba;
ret = snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n", dev->se_hba->hba_index);
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -944,20 +878,17 @@ static ssize_t target_stat_scsi_transport_show_attr_device(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
struct se_portal_group *tpg;
ssize_t ret;
struct se_device *dev;
struct se_portal_group *tpg = lun->lun_tpg;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
tpg = sep->sep_tpg;
dev = lun->lun_se_dev;
if (dev) {
/* scsiTransportType */
ret = snprintf(page, PAGE_SIZE, "scsiTransport%s\n",
tpg->se_tpg_tfo->get_fabric_name());
}
spin_unlock(&lun->lun_sep_lock);
return ret;
}
@ -967,17 +898,13 @@ static ssize_t target_stat_scsi_transport_show_attr_indx(
struct se_port_stat_grps *pgrps, char *page)
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_port *sep;
struct se_portal_group *tpg;
ssize_t ret;
struct se_device *dev;
struct se_portal_group *tpg = lun->lun_tpg;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
tpg = sep->sep_tpg;
dev = lun->lun_se_dev;
if (dev)
ret = snprintf(page, PAGE_SIZE, "%u\n",
tpg->se_tpg_tfo->tpg_get_inst_index(tpg));
spin_unlock(&lun->lun_sep_lock);
@ -990,24 +917,20 @@ static ssize_t target_stat_scsi_transport_show_attr_dev_name(
{
struct se_lun *lun = container_of(pgrps, struct se_lun, port_stat_grps);
struct se_device *dev = lun->lun_se_dev;
struct se_port *sep;
struct se_portal_group *tpg;
struct se_portal_group *tpg = lun->lun_tpg;
struct t10_wwn *wwn;
ssize_t ret;
ssize_t ret = -ENODEV;
spin_lock(&lun->lun_sep_lock);
sep = lun->lun_sep;
if (!sep) {
spin_unlock(&lun->lun_sep_lock);
return -ENODEV;
}
tpg = sep->sep_tpg;
dev = lun->lun_se_dev;
if (dev) {
wwn = &dev->t10_wwn;
/* scsiTransportDevName */
ret = snprintf(page, PAGE_SIZE, "%s+%s\n",
tpg->se_tpg_tfo->tpg_get_wwn(tpg),
(strlen(wwn->unit_serial)) ? wwn->unit_serial :
wwn->vendor);
}
spin_unlock(&lun->lun_sep_lock);
return ret;
}

95
drivers/target/target_core_tpg.c
View file

@ -40,6 +40,7 @@
#include <target/target_core_fabric.h>
#include "target_core_internal.h"
#include "target_core_alua.h"
#include "target_core_pr.h"
extern struct se_device *g_lun0_dev;
@ -484,32 +485,14 @@ static void core_tpg_lun_ref_release(struct percpu_ref *ref)
complete(&lun->lun_ref_comp);
}
static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
{
/* Set in core_dev_setup_virtual_lun0() */
struct se_device *dev = g_lun0_dev;
struct se_lun *lun = &se_tpg->tpg_virt_lun0;
u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
int ret;
lun->unpacked_lun = 0;
atomic_set(&lun->lun_acl_count, 0);
spin_lock_init(&lun->lun_sep_lock);
init_completion(&lun->lun_ref_comp);
ret = core_tpg_add_lun(se_tpg, lun, lun_access, dev);
if (ret < 0)
return ret;
return 0;
}
int core_tpg_register(
const struct target_core_fabric_ops *tfo,
struct se_wwn *se_wwn,
struct se_portal_group *se_tpg,
int proto_id)
{
int ret;
INIT_HLIST_HEAD(&se_tpg->tpg_lun_hlist);
se_tpg->proto_id = proto_id;
se_tpg->se_tpg_tfo = tfo;
@ -523,8 +506,16 @@ int core_tpg_register(
mutex_init(&se_tpg->acl_node_mutex);
if (se_tpg->proto_id >= 0) {
if (core_tpg_setup_virtual_lun0(se_tpg) < 0)
return -ENOMEM;
se_tpg->tpg_virt_lun0 = core_tpg_alloc_lun(se_tpg, 0);
if (IS_ERR(se_tpg->tpg_virt_lun0))
return PTR_ERR(se_tpg->tpg_virt_lun0);
ret = core_tpg_add_lun(se_tpg, se_tpg->tpg_virt_lun0,
TRANSPORT_LUNFLAGS_READ_ONLY, g_lun0_dev);
if (ret < 0) {
kfree(se_tpg->tpg_virt_lun0);
return ret;
}
}
spin_lock_bh(&tpg_lock);
@ -575,8 +566,10 @@ int core_tpg_deregister(struct se_portal_group *se_tpg)
kfree(nacl);
}
if (se_tpg->proto_id >= 0)
core_tpg_remove_lun(se_tpg, &se_tpg->tpg_virt_lun0);
if (se_tpg->proto_id >= 0) {
core_tpg_remove_lun(se_tpg, se_tpg->tpg_virt_lun0);
kfree_rcu(se_tpg->tpg_virt_lun0, rcu_head);
}
return 0;
}
@ -607,6 +600,15 @@ struct se_lun *core_tpg_alloc_lun(
atomic_set(&lun->lun_acl_count, 0);
spin_lock_init(&lun->lun_sep_lock);
init_completion(&lun->lun_ref_comp);
INIT_LIST_HEAD(&lun->lun_deve_list);
INIT_LIST_HEAD(&lun->lun_dev_link);
atomic_set(&lun->lun_tg_pt_secondary_offline, 0);
spin_lock_init(&lun->lun_deve_lock);
mutex_init(&lun->lun_tg_pt_md_mutex);
INIT_LIST_HEAD(&lun->lun_tg_pt_gp_link);
spin_lock_init(&lun->lun_tg_pt_gp_lock);
atomic_set(&lun->lun_active, 0);
lun->lun_tpg = tpg;
return lun;
}
@ -622,21 +624,40 @@ int core_tpg_add_lun(
ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release, 0,
GFP_KERNEL);
if (ret < 0)
return ret;
goto out;
ret = core_dev_export(dev, tpg, lun);
if (ret < 0) {
percpu_ref_exit(&lun->lun_ref);
return ret;
}
ret = core_alloc_rtpi(lun, dev);
if (ret)
goto out_kill_ref;
if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH) &&
!(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE))
target_attach_tg_pt_gp(lun, dev->t10_alua.default_tg_pt_gp);
mutex_lock(&tpg->tpg_lun_mutex);
spin_lock(&lun->lun_sep_lock);
lun->lun_index = dev->dev_index;
lun->lun_se_dev = dev;
spin_unlock(&lun->lun_sep_lock);
spin_lock(&dev->se_port_lock);
rcu_assign_pointer(lun->lun_se_dev, dev);
dev->export_count++;
list_add_tail(&lun->lun_dev_link, &dev->dev_sep_list);
spin_unlock(&dev->se_port_lock);
lun->lun_access = lun_access;
if (!(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE))
hlist_add_head_rcu(&lun->link, &tpg->tpg_lun_hlist);
mutex_unlock(&tpg->tpg_lun_mutex);
return 0;
out_kill_ref:
percpu_ref_exit(&lun->lun_ref);
out:
return ret;
}
void core_tpg_remove_lun(
@ -648,9 +669,19 @@ void core_tpg_remove_lun(
core_clear_lun_from_tpg(lun, tpg);
transport_clear_lun_ref(lun);
core_dev_unexport(lun->lun_se_dev, tpg, lun);
mutex_lock(&tpg->tpg_lun_mutex);
if (lun->lun_se_dev) {
while (atomic_read(&lun->lun_active))
cpu_relax();
target_detach_tg_pt_gp(lun);
spin_lock(&dev->se_port_lock);
list_del(&lun->lun_dev_link);
dev->export_count--;
rcu_assign_pointer(lun->lun_se_dev, NULL);
spin_unlock(&dev->se_port_lock);
}
if (!(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE))
hlist_del_rcu(&lun->link);
mutex_unlock(&tpg->tpg_lun_mutex);

34
drivers/target/target_core_transport.c
View file

@ -60,7 +60,6 @@ struct kmem_cache *t10_pr_reg_cache;
struct kmem_cache *t10_alua_lu_gp_cache;
struct kmem_cache *t10_alua_lu_gp_mem_cache;
struct kmem_cache *t10_alua_tg_pt_gp_cache;
struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
struct kmem_cache *t10_alua_lba_map_cache;
struct kmem_cache *t10_alua_lba_map_mem_cache;
@ -119,16 +118,6 @@ int init_se_kmem_caches(void)
"cache failed\n");
goto out_free_lu_gp_mem_cache;
}
t10_alua_tg_pt_gp_mem_cache = kmem_cache_create(
"t10_alua_tg_pt_gp_mem_cache",
sizeof(struct t10_alua_tg_pt_gp_member),
__alignof__(struct t10_alua_tg_pt_gp_member),
0, NULL);
if (!t10_alua_tg_pt_gp_mem_cache) {
pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_"
"mem_t failed\n");
goto out_free_tg_pt_gp_cache;
}
t10_alua_lba_map_cache = kmem_cache_create(
"t10_alua_lba_map_cache",
sizeof(struct t10_alua_lba_map),
@ -136,7 +125,7 @@ int init_se_kmem_caches(void)
if (!t10_alua_lba_map_cache) {
pr_err("kmem_cache_create() for t10_alua_lba_map_"
"cache failed\n");
goto out_free_tg_pt_gp_mem_cache;
goto out_free_tg_pt_gp_cache;
}
t10_alua_lba_map_mem_cache = kmem_cache_create(
"t10_alua_lba_map_mem_cache",
@ -159,8 +148,6 @@ int init_se_kmem_caches(void)
kmem_cache_destroy(t10_alua_lba_map_mem_cache);
out_free_lba_map_cache:
kmem_cache_destroy(t10_alua_lba_map_cache);
out_free_tg_pt_gp_mem_cache:
kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
out_free_tg_pt_gp_cache:
kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
out_free_lu_gp_mem_cache:
@ -186,7 +173,6 @@ void release_se_kmem_caches(void)
kmem_cache_destroy(t10_alua_lu_gp_cache);
kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
kmem_cache_destroy(t10_alua_lba_map_cache);
kmem_cache_destroy(t10_alua_lba_map_mem_cache);
}
@ -1277,8 +1263,7 @@ target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb)
cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE;
spin_lock(&cmd->se_lun->lun_sep_lock);
if (cmd->se_lun->lun_sep)
cmd->se_lun->lun_sep->sep_stats.cmd_pdus++;
cmd->se_lun->lun_stats.cmd_pdus++;
spin_unlock(&cmd->se_lun->lun_sep_lock);
return 0;
}
@ -2076,10 +2061,7 @@ static void target_complete_ok_work(struct work_struct *work)
switch (cmd->data_direction) {
case DMA_FROM_DEVICE:
spin_lock(&cmd->se_lun->lun_sep_lock);
if (cmd->se_lun->lun_sep) {
cmd->se_lun->lun_sep->sep_stats.tx_data_octets +=
cmd->data_length;
}
cmd->se_lun->lun_stats.tx_data_octets += cmd->data_length;
spin_unlock(&cmd->se_lun->lun_sep_lock);
/*
* Perform READ_STRIP of PI using software emulation when
@ -2104,20 +2086,14 @@ static void target_complete_ok_work(struct work_struct *work)
break;
case DMA_TO_DEVICE:
spin_lock(&cmd->se_lun->lun_sep_lock);
if (cmd->se_lun->lun_sep) {
cmd->se_lun->lun_sep->sep_stats.rx_data_octets +=
cmd->data_length;
}
cmd->se_lun->lun_stats.rx_data_octets += cmd->data_length;
spin_unlock(&cmd->se_lun->lun_sep_lock);
/*
* Check if we need to send READ payload for BIDI-COMMAND
*/
if (cmd->se_cmd_flags & SCF_BIDI) {
spin_lock(&cmd->se_lun->lun_sep_lock);
if (cmd->se_lun->lun_sep) {
cmd->se_lun->lun_sep->sep_stats.tx_data_octets +=
cmd->data_length;
}
cmd->se_lun->lun_stats.tx_data_octets += cmd->data_length;
spin_unlock(&cmd->se_lun->lun_sep_lock);
ret = cmd->se_tfo->queue_data_in(cmd);
if (ret == -EAGAIN || ret == -ENOMEM)

17
drivers/target/target_core_xcopy.c
View file

@ -348,8 +348,7 @@ struct xcopy_pt_cmd {
unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER];
};
static struct se_port xcopy_pt_port;
static struct se_portal_group xcopy_pt_tpg;
struct se_portal_group xcopy_pt_tpg;
static struct se_session xcopy_pt_sess;
static struct se_node_acl xcopy_pt_nacl;
@ -439,17 +438,11 @@ int target_xcopy_setup_pt(void)
return -ENOMEM;
}
memset(&xcopy_pt_port, 0, sizeof(struct se_port));
INIT_LIST_HEAD(&xcopy_pt_port.sep_alua_list);
INIT_LIST_HEAD(&xcopy_pt_port.sep_list);
mutex_init(&xcopy_pt_port.sep_tg_pt_md_mutex);
memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group));
INIT_LIST_HEAD(&xcopy_pt_tpg.se_tpg_node);
INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list);
INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list);
xcopy_pt_port.sep_tpg = &xcopy_pt_tpg;
xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo;
memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl));
@ -490,10 +483,6 @@ static void target_xcopy_setup_pt_port(
*/
if (remote_port) {
xpt_cmd->remote_port = remote_port;
pt_cmd->se_lun->lun_sep = &xcopy_pt_port;
pr_debug("Setup emulated remote DEST xcopy_pt_port: %p to"
" cmd->se_lun->lun_sep for X-COPY data PUSH\n",
pt_cmd->se_lun->lun_sep);
} else {
pt_cmd->se_lun = ec_cmd->se_lun;
pt_cmd->se_dev = ec_cmd->se_dev;
@ -513,10 +502,6 @@ static void target_xcopy_setup_pt_port(
*/
if (remote_port) {
xpt_cmd->remote_port = remote_port;
pt_cmd->se_lun->lun_sep = &xcopy_pt_port;
pr_debug("Setup emulated remote SRC xcopy_pt_port: %p to"
" cmd->se_lun->lun_sep for X-COPY data PULL\n",
pt_cmd->se_lun->lun_sep);
} else {
pt_cmd->se_lun = ec_cmd->se_lun;
pt_cmd->se_dev = ec_cmd->se_dev;

74
include/target/target_core_base.h
View file

@ -304,22 +304,13 @@ struct t10_alua_tg_pt_gp {
struct se_device *tg_pt_gp_dev;
struct config_group tg_pt_gp_group;
struct list_head tg_pt_gp_list;
struct list_head tg_pt_gp_mem_list;
struct se_port *tg_pt_gp_alua_port;
struct list_head tg_pt_gp_lun_list;
struct se_lun *tg_pt_gp_alua_lun;
struct se_node_acl *tg_pt_gp_alua_nacl;
struct delayed_work tg_pt_gp_transition_work;
struct completion *tg_pt_gp_transition_complete;
};
struct t10_alua_tg_pt_gp_member {
bool tg_pt_gp_assoc;
atomic_t tg_pt_gp_mem_ref_cnt;
spinlock_t tg_pt_gp_mem_lock;
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct se_port *tg_pt;
struct list_head tg_pt_gp_mem_list;
};
struct t10_vpd {
unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
int protocol_identifier_set;
@ -650,6 +641,7 @@ struct se_dev_entry {
#define DEF_PR_REG_ACTIVE 1
unsigned long deve_flags;
struct list_head alua_port_list;
struct list_head lun_link;
struct list_head ua_list;
struct hlist_node link;
struct rcu_head rcu_head;
@ -697,7 +689,14 @@ struct se_port_stat_grps {
struct config_group scsi_transport_group;
};
struct scsi_port_stats {
u32 cmd_pdus;
u64 tx_data_octets;
u64 rx_data_octets;
};
struct se_lun {
/* RELATIVE TARGET PORT IDENTIFER */
u16 lun_rtpi;
#define SE_LUN_LINK_MAGIC 0xffff7771
u32 lun_link_magic;
@ -707,12 +706,30 @@ struct se_lun {
u32 lun_index;
atomic_t lun_acl_count;
spinlock_t lun_sep_lock;
struct se_device *lun_se_dev;
struct se_port *lun_sep;
struct se_device __rcu *lun_se_dev;
struct list_head lun_deve_list;
spinlock_t lun_deve_lock;
/* ALUA state */
int lun_tg_pt_secondary_stat;
int lun_tg_pt_secondary_write_md;
atomic_t lun_tg_pt_secondary_offline;
struct mutex lun_tg_pt_md_mutex;
/* ALUA target port group linkage */
struct list_head lun_tg_pt_gp_link;
struct t10_alua_tg_pt_gp *lun_tg_pt_gp;
spinlock_t lun_tg_pt_gp_lock;
atomic_t lun_active;
struct se_portal_group *lun_tpg;
struct scsi_port_stats lun_stats;
struct config_group lun_group;
struct se_port_stat_grps port_stat_grps;
struct completion lun_ref_comp;
struct percpu_ref lun_ref;
struct list_head lun_dev_link;
struct hlist_node link;
struct rcu_head rcu_head;
};
@ -737,7 +754,6 @@ struct se_device {
#define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004
#define DF_USING_UDEV_PATH 0x00000008
#define DF_USING_ALIAS 0x00000010
u32 dev_port_count;
/* Physical device queue depth */
u32 queue_depth;
/* Used for SPC-2 reservations enforce of ISIDs */
@ -754,7 +770,7 @@ struct se_device {
atomic_t dev_ordered_id;
atomic_t dev_ordered_sync;
atomic_t dev_qf_count;
int export_count;
u32 export_count;
spinlock_t delayed_cmd_lock;
spinlock_t execute_task_lock;
spinlock_t dev_reservation_lock;
@ -821,32 +837,6 @@ struct se_hba {
struct target_backend *backend;
};
struct scsi_port_stats {
u64 cmd_pdus;
u64 tx_data_octets;
u64 rx_data_octets;
};
struct se_port {
/* RELATIVE TARGET PORT IDENTIFER */
u16 sep_rtpi;
int sep_tg_pt_secondary_stat;
int sep_tg_pt_secondary_write_md;
u32 sep_index;
struct scsi_port_stats sep_stats;
/* Used for ALUA Target Port Groups membership */
atomic_t sep_tg_pt_secondary_offline;
/* Used for PR ALL_TG_PT=1 */
atomic_t sep_tg_pt_ref_cnt;
spinlock_t sep_alua_lock;
struct mutex sep_tg_pt_md_mutex;
struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
struct se_lun *sep_lun;
struct se_portal_group *sep_tpg;
struct list_head sep_alua_list;
struct list_head sep_list;
};
struct se_tpg_np {
struct se_portal_group *tpg_np_parent;
struct config_group tpg_np_group;
@ -872,7 +862,7 @@ struct se_portal_group {
/* linked list for initiator ACL list */
struct list_head acl_node_list;
struct hlist_head tpg_lun_hlist;
struct se_lun tpg_virt_lun0;
struct se_lun *tpg_virt_lun0;
/* List of TCM sessions associated wth this TPG */
struct list_head tpg_sess_list;
/* Pointer to $FABRIC_MOD dependent code */