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Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Browse Source 
Pull target updates from Nicholas Bellinger:
 "This series contains post merge qla_target.c / tcm_qla2xxx bugfixes
  from the past weeks, including the patch to allow target-core to use
  an optional session shutdown callback to help address an active I/O
  shutdown bug in tcm_qla2xxx code (Joern).

  Also included is a target regression bugfix releated to explict ALUA
  target port group CDB emulation that is CC'ed to stable (Roland)."

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  qla2xxx: Remove version.h header file inclusion
  tcm_qla2xxx: Handle malformed wwn strings properly
  tcm_qla2xxx: tcm_qla2xxx_handle_tmr() can be static
  qla2xxx: Don't leak commands we give up on in qlt_do_work()
  qla2xxx: Don't crash if we can't find cmd for failed CTIO
  tcm_qla2xxx: Don't insert nacls without sessions into the btree
  target: Return error to initiator if SET TARGET PORT GROUPS emulation fails
  tcm_qla2xxx: Clear session s_id + loop_id earlier during shutdown
  tcm_qla2xxx: Convert to TFO->put_session() usage
  target: Add TFO->put_session() caller for HW fabric session shutdown
This commit is contained in:
Linus Torvalds 2012-06-15 16:07:24 -07:00
commit a41b0e7156
6 changed files with 74 additions and 104 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/scsi/qla2xxx/qla_target.c
View File

@ -26,7 +26,6 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/version.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
@ -2477,11 +2476,9 @@ static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
}
cmd = qlt_ctio_to_cmd(vha, handle, ctio);
if (cmd == NULL) {
if (status != CTIO_SUCCESS)
qlt_term_ctio_exchange(vha, ctio, NULL, status);
if (cmd == NULL)
return;
}
se_cmd = &cmd->se_cmd;
tfo = se_cmd->se_tfo;
@ -2727,10 +2724,12 @@ static void qlt_do_work(struct work_struct *work)
out_term:
ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
/*
* cmd has not sent to target yet, so pass NULL as the second argument
* cmd has not sent to target yet, so pass NULL as the second
* argument to qlt_send_term_exchange() and free the memory here.
*/
spin_lock_irqsave(&ha->hardware_lock, flags);
qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
kmem_cache_free(qla_tgt_cmd_cachep, cmd);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (sess)
ha->tgt.tgt_ops->put_sess(sess);

1
drivers/scsi/qla2xxx/qla_target.h
View File

@ -919,7 +919,6 @@ struct qla_tgt_srr_ctio {
#define QLA_TGT_XMIT_STATUS 2
#define QLA_TGT_XMIT_ALL (QLA_TGT_XMIT_STATUS|QLA_TGT_XMIT_DATA)
#include <linux/version.h>
extern struct qla_tgt_data qla_target;
/*

152
drivers/scsi/qla2xxx/tcm_qla2xxx.c
View File

@ -137,13 +137,15 @@ static char *tcm_qla2xxx_get_fabric_name(void)
*/
static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
{
unsigned int i, j, value;
unsigned int i, j;
u8 wwn[8];
memset(wwn, 0, sizeof(wwn));
/* Validate and store the new name */
for (i = 0, j = 0; i < 16; i++) {
int value;
value = hex_to_bin(*ns++);
if (value >= 0)
j = (j << 4) | value;
@ -652,8 +654,8 @@ static int tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
/*
* Called from qla_target.c:qlt_issue_task_mgmt()
*/
int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
uint8_t tmr_func, uint32_t tag)
static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
uint8_t tmr_func, uint32_t tag)
{
struct qla_tgt_sess *sess = mcmd->sess;
struct se_cmd *se_cmd = &mcmd->se_cmd;
@ -762,65 +764,8 @@ static u16 tcm_qla2xxx_set_fabric_sense_len(struct se_cmd *se_cmd,
struct target_fabric_configfs *tcm_qla2xxx_fabric_configfs;
struct target_fabric_configfs *tcm_qla2xxx_npiv_fabric_configfs;
static int tcm_qla2xxx_setup_nacl_from_rport(
struct se_portal_group *se_tpg,
struct se_node_acl *se_nacl,
struct tcm_qla2xxx_lport *lport,
struct tcm_qla2xxx_nacl *nacl,
u64 rport_wwnn)
{
struct scsi_qla_host *vha = lport->qla_vha;
struct Scsi_Host *sh = vha->host;
struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
struct fc_rport *rport;
unsigned long flags;
void *node;
int rc;
/*
* Scan the existing rports, and create a session for the
* explict NodeACL is an matching rport->node_name already
* exists.
*/
spin_lock_irqsave(sh->host_lock, flags);
list_for_each_entry(rport, &fc_host->rports, peers) {
if (rport_wwnn != rport->node_name)
continue;
pr_debug("Located existing rport_wwpn and rport->node_name: 0x%016LX, port_id: 0x%04x\n",
rport->node_name, rport->port_id);
nacl->nport_id = rport->port_id;
spin_unlock_irqrestore(sh->host_lock, flags);
spin_lock_irqsave(&vha->hw->hardware_lock, flags);
node = btree_lookup32(&lport->lport_fcport_map, rport->port_id);
if (node) {
rc = btree_update32(&lport->lport_fcport_map,
rport->port_id, se_nacl);
} else {
rc = btree_insert32(&lport->lport_fcport_map,
rport->port_id, se_nacl,
GFP_ATOMIC);
}
spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
if (rc) {
pr_err("Unable to insert se_nacl into fcport_map");
WARN_ON(rc > 0);
return rc;
}
pr_debug("Inserted into fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%08x\n",
se_nacl, rport_wwnn, nacl->nport_id);
return 1;
}
spin_unlock_irqrestore(sh->host_lock, flags);
return 0;
}
static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *);
/*
* Expected to be called with struct qla_hw_data->hardware_lock held
*/
@ -842,11 +787,40 @@ static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
se_nacl, nacl->nport_wwnn, nacl->nport_id);
/*
* Now clear the se_nacl and session pointers from our HW lport lookup
* table mapping for this initiator's fabric S_ID and LOOP_ID entries.
*
* This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
* target_wait_for_sess_cmds() before the session waits for outstanding
* I/O to complete, to avoid a race between session shutdown execution
* and incoming ATIOs or TMRs picking up a stale se_node_act reference.
*/
tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
}
static void tcm_qla2xxx_release_session(struct kref *kref)
{
struct se_session *se_sess = container_of(kref,
struct se_session, sess_kref);
qlt_unreg_sess(se_sess->fabric_sess_ptr);
}
static void tcm_qla2xxx_put_session(struct se_session *se_sess)
{
struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
struct qla_hw_data *ha = sess->vha->hw;
unsigned long flags;
spin_lock_irqsave(&ha->hardware_lock, flags);
kref_put(&se_sess->sess_kref, tcm_qla2xxx_release_session);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
}
static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
{
target_put_session(sess->se_sess);
tcm_qla2xxx_put_session(sess->se_sess);
}
static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
@ -859,14 +833,10 @@ static struct se_node_acl *tcm_qla2xxx_make_nodeacl(
struct config_group *group,
const char *name)
{
struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
struct tcm_qla2xxx_lport, lport_wwn);
struct se_node_acl *se_nacl, *se_nacl_new;
struct tcm_qla2xxx_nacl *nacl;
u64 wwnn;
u32 qla2xxx_nexus_depth;
int rc;
if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
return ERR_PTR(-EINVAL);
@ -893,16 +863,6 @@ static struct se_node_acl *tcm_qla2xxx_make_nodeacl(
nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
nacl->nport_wwnn = wwnn;
tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
/*
* Setup a se_nacl handle based on an a matching struct fc_rport setup
* via drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
*/
rc = tcm_qla2xxx_setup_nacl_from_rport(se_tpg, se_nacl, lport,
nacl, wwnn);
if (rc < 0) {
tcm_qla2xxx_release_fabric_acl(se_tpg, se_nacl_new);
return ERR_PTR(rc);
}
return se_nacl;
}
@ -1390,6 +1350,25 @@ static void tcm_qla2xxx_set_sess_by_loop_id(
nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
}
/*
* Should always be called with qla_hw_data->hardware_lock held.
*/
static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess)
{
struct se_session *se_sess = sess->se_sess;
unsigned char be_sid[3];
be_sid[0] = sess->s_id.b.domain;
be_sid[1] = sess->s_id.b.area;
be_sid[2] = sess->s_id.b.al_pa;
tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
sess, be_sid);
tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
sess, sess->loop_id);
}
static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
{
struct qla_tgt *tgt = sess->tgt;
@ -1398,8 +1377,6 @@ static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
struct se_node_acl *se_nacl;
struct tcm_qla2xxx_lport *lport;
struct tcm_qla2xxx_nacl *nacl;
unsigned char be_sid[3];
unsigned long flags;
BUG_ON(in_interrupt());
@ -1419,21 +1396,6 @@ static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
return;
}
target_wait_for_sess_cmds(se_sess, 0);
/*
* And now clear the se_nacl and session pointers from our HW lport
* mappings for fabric S_ID and LOOP_ID.
*/
memset(&be_sid, 0, 3);
be_sid[0] = sess->s_id.b.domain;
be_sid[1] = sess->s_id.b.area;
be_sid[2] = sess->s_id.b.al_pa;
spin_lock_irqsave(&ha->hardware_lock, flags);
tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
sess, be_sid);
tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
sess, sess->loop_id);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
transport_deregister_session_configfs(sess->se_sess);
transport_deregister_session(sess->se_sess);
@ -1731,6 +1693,7 @@ static struct target_core_fabric_ops tcm_qla2xxx_ops = {
.new_cmd_map = NULL,
.check_stop_free = tcm_qla2xxx_check_stop_free,
.release_cmd = tcm_qla2xxx_release_cmd,
.put_session = tcm_qla2xxx_put_session,
.shutdown_session = tcm_qla2xxx_shutdown_session,
.close_session = tcm_qla2xxx_close_session,
.sess_get_index = tcm_qla2xxx_sess_get_index,
@ -1779,6 +1742,7 @@ static struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
.tpg_release_fabric_acl = tcm_qla2xxx_release_fabric_acl,
.tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index,
.release_cmd = tcm_qla2xxx_release_cmd,
.put_session = tcm_qla2xxx_put_session,
.shutdown_session = tcm_qla2xxx_shutdown_session,
.close_session = tcm_qla2xxx_close_session,
.sess_get_index = tcm_qla2xxx_sess_get_index,

5
drivers/target/target_core_alua.c
View File

@ -374,8 +374,9 @@ int target_emulate_set_target_port_groups(struct se_cmd *cmd)
out:
transport_kunmap_data_sg(cmd);
target_complete_cmd(cmd, GOOD);
return 0;
if (!rc)
target_complete_cmd(cmd, GOOD);
return rc;
}
static inline int core_alua_state_nonoptimized(

8
drivers/target/target_core_transport.c
View File

@ -315,7 +315,7 @@ void transport_register_session(
}
EXPORT_SYMBOL(transport_register_session);
static void target_release_session(struct kref *kref)
void target_release_session(struct kref *kref)
{
struct se_session *se_sess = container_of(kref,
struct se_session, sess_kref);
@ -332,6 +332,12 @@ EXPORT_SYMBOL(target_get_session);
void target_put_session(struct se_session *se_sess)
{
struct se_portal_group *tpg = se_sess->se_tpg;
if (tpg->se_tpg_tfo->put_session != NULL) {
tpg->se_tpg_tfo->put_session(se_sess);
return;
}
kref_put(&se_sess->sess_kref, target_release_session);
}
EXPORT_SYMBOL(target_put_session);

1
include/target/target_core_fabric.h
View File

@ -47,6 +47,7 @@ struct target_core_fabric_ops {
*/
int (*check_stop_free)(struct se_cmd *);
void (*release_cmd)(struct se_cmd *);
void (*put_session)(struct se_session *);
/*
* Called with spin_lock_bh(struct se_portal_group->session_lock held.
*/