diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 12 | ||||
| -rw-r--r-- | drivers/target/iscsi/iscsi_target_erl2.c | 41 | ||||
| -rw-r--r-- | drivers/target/target_core_transport.c | 82 |
3 files changed, 50 insertions, 85 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 354a8339a3f9..e4b9ba296dcf 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -3940,7 +3940,6 @@ static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) { struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; struct iscsi_session *sess = conn->sess; - struct se_cmd *se_cmd; /* * We expect this function to only ever be called from either RX or TX * thread context via iscsit_close_connection() once the other context @@ -3953,16 +3952,13 @@ static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) list_del(&cmd->i_list); spin_unlock_bh(&conn->cmd_lock); iscsit_increment_maxcmdsn(cmd, sess); - se_cmd = &cmd->se_cmd; /* * Special cases for active iSCSI TMR, and * transport_lookup_cmd_lun() failing from * iscsit_get_lun_for_cmd() in iscsit_handle_scsi_cmd(). */ - if (cmd->tmr_req && se_cmd->transport_wait_for_tasks) - se_cmd->transport_wait_for_tasks(se_cmd, 1); - else if (cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD) - transport_release_cmd(se_cmd); + if (cmd->tmr_req) + transport_generic_free_cmd(&cmd->se_cmd, 1); else iscsit_release_cmd(cmd); @@ -3973,10 +3969,8 @@ static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) spin_unlock_bh(&conn->cmd_lock); iscsit_increment_maxcmdsn(cmd, sess); - se_cmd = &cmd->se_cmd; - if (se_cmd->transport_wait_for_tasks) - se_cmd->transport_wait_for_tasks(se_cmd, 1); + transport_generic_free_cmd(&cmd->se_cmd, 1); spin_lock_bh(&conn->cmd_lock); } diff --git a/drivers/target/iscsi/iscsi_target_erl2.c b/drivers/target/iscsi/iscsi_target_erl2.c index 000356baf0b5..c3803b2fdd65 100644 --- a/drivers/target/iscsi/iscsi_target_erl2.c +++ b/drivers/target/iscsi/iscsi_target_erl2.c @@ -143,12 +143,10 @@ void iscsit_free_connection_recovery_entires(struct iscsi_session *sess) list_del(&cmd->i_list); cmd->conn = NULL; spin_unlock(&cr->conn_recovery_cmd_lock); - if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD) || - !(cmd->se_cmd.transport_wait_for_tasks)) + if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD)) iscsit_release_cmd(cmd); else - cmd->se_cmd.transport_wait_for_tasks( - &cmd->se_cmd, 1); + transport_generic_free_cmd(&cmd->se_cmd, 1); spin_lock(&cr->conn_recovery_cmd_lock); } spin_unlock(&cr->conn_recovery_cmd_lock); @@ -170,12 +168,10 @@ void iscsit_free_connection_recovery_entires(struct iscsi_session *sess) list_del(&cmd->i_list); cmd->conn = NULL; spin_unlock(&cr->conn_recovery_cmd_lock); - if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD) || - !(cmd->se_cmd.transport_wait_for_tasks)) + if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD)) iscsit_release_cmd(cmd); else - cmd->se_cmd.transport_wait_for_tasks( - &cmd->se_cmd, 1); + transport_generic_free_cmd(&cmd->se_cmd, 1); spin_lock(&cr->conn_recovery_cmd_lock); } spin_unlock(&cr->conn_recovery_cmd_lock); @@ -260,12 +256,10 @@ void iscsit_discard_cr_cmds_by_expstatsn( iscsit_remove_cmd_from_connection_recovery(cmd, sess); spin_unlock(&cr->conn_recovery_cmd_lock); - if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD) || - !(cmd->se_cmd.transport_wait_for_tasks)) + if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD)) iscsit_release_cmd(cmd); else - cmd->se_cmd.transport_wait_for_tasks( - &cmd->se_cmd, 1); + transport_generic_free_cmd(&cmd->se_cmd, 1); spin_lock(&cr->conn_recovery_cmd_lock); } spin_unlock(&cr->conn_recovery_cmd_lock); @@ -319,12 +313,10 @@ int iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(struct iscsi_conn *conn) list_del(&cmd->i_list); spin_unlock_bh(&conn->cmd_lock); - if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD) || - !(cmd->se_cmd.transport_wait_for_tasks)) + if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD)) iscsit_release_cmd(cmd); else - cmd->se_cmd.transport_wait_for_tasks( - &cmd->se_cmd, 1); + transport_generic_free_cmd(&cmd->se_cmd, 1); spin_lock_bh(&conn->cmd_lock); } spin_unlock_bh(&conn->cmd_lock); @@ -378,12 +370,10 @@ int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn) list_del(&cmd->i_list); spin_unlock_bh(&conn->cmd_lock); - if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD) || - !(cmd->se_cmd.transport_wait_for_tasks)) + if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD)) iscsit_release_cmd(cmd); else - cmd->se_cmd.transport_wait_for_tasks( - &cmd->se_cmd, 1); + transport_generic_free_cmd(&cmd->se_cmd, 1); spin_lock_bh(&conn->cmd_lock); continue; } @@ -404,12 +394,10 @@ int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn) list_del(&cmd->i_list); spin_unlock_bh(&conn->cmd_lock); - if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD) || - !(cmd->se_cmd.transport_wait_for_tasks)) + if (!(cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD)) iscsit_release_cmd(cmd); else - cmd->se_cmd.transport_wait_for_tasks( - &cmd->se_cmd, 1); + transport_generic_free_cmd(&cmd->se_cmd, 1); spin_lock_bh(&conn->cmd_lock); continue; } @@ -434,9 +422,8 @@ int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn) iscsit_free_all_datain_reqs(cmd); - if ((cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD) && - cmd->se_cmd.transport_wait_for_tasks) - cmd->se_cmd.transport_wait_for_tasks(&cmd->se_cmd, 0); + if (cmd->se_cmd.se_cmd_flags & SCF_SE_LUN_CMD) + transport_wait_for_tasks(&cmd->se_cmd); /* * Add the struct iscsi_cmd to the connection recovery cmd list */ diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index ae1efc7c9ec6..f8de042e532e 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1638,8 +1638,6 @@ static int transport_check_alloc_task_attr(struct se_cmd *cmd) return 0; } -static void transport_generic_wait_for_tasks(struct se_cmd *, int); - /* transport_generic_allocate_tasks(): * * Called from fabric RX Thread. @@ -1651,12 +1649,6 @@ int transport_generic_allocate_tasks( int ret; transport_generic_prepare_cdb(cdb); - - /* - * This is needed for early exceptions. - */ - cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; - /* * Ensure that the received CDB is less than the max (252 + 8) bytes * for VARIABLE_LENGTH_CMD @@ -1739,7 +1731,7 @@ int transport_handle_cdb_direct( * Set TRANSPORT_NEW_CMD state and cmd->t_transport_active=1 following * transport_generic_handle_cdb*() -> transport_add_cmd_to_queue() * in existing usage to ensure that outstanding descriptors are handled - * correctly during shutdown via transport_generic_wait_for_tasks() + * correctly during shutdown via transport_wait_for_tasks() * * Also, we don't take cmd->t_state_lock here as we only expect * this to be called for initial descriptor submission. @@ -1819,11 +1811,6 @@ EXPORT_SYMBOL(transport_generic_handle_data); int transport_generic_handle_tmr( struct se_cmd *cmd) { - /* - * This is needed for early exceptions. - */ - cmd->transport_wait_for_tasks = &transport_generic_wait_for_tasks; - transport_add_cmd_to_queue(cmd, TRANSPORT_PROCESS_TMR); return 0; } @@ -2504,8 +2491,6 @@ void transport_new_cmd_failure(struct se_cmd *se_cmd) spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); } -static void transport_nop_wait_for_tasks(struct se_cmd *, int); - static inline u32 transport_get_sectors_6( unsigned char *cdb, struct se_cmd *cmd, @@ -2780,7 +2765,6 @@ static int transport_get_sense_data(struct se_cmd *cmd) static int transport_handle_reservation_conflict(struct se_cmd *cmd) { - cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT; cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT; @@ -2881,8 +2865,6 @@ static int transport_generic_cmd_sequencer( * Check for an existing UNIT ATTENTION condition */ if (core_scsi3_ua_check(cmd, cdb) < 0) { - cmd->transport_wait_for_tasks = - &transport_nop_wait_for_tasks; cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION; return -EINVAL; @@ -2892,7 +2874,6 @@ static int transport_generic_cmd_sequencer( */ ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq); if (ret != 0) { - cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; /* * Set SCSI additional sense code (ASC) to 'LUN Not Accessible'; * The ALUA additional sense code qualifier (ASCQ) is determined @@ -3396,7 +3377,6 @@ static int transport_generic_cmd_sequencer( pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode" " 0x%02x, sending CHECK_CONDITION.\n", cmd->se_tfo->get_fabric_name(), cdb[0]); - cmd->transport_wait_for_tasks = &transport_nop_wait_for_tasks; goto out_unsupported_cdb; } @@ -4304,17 +4284,20 @@ EXPORT_SYMBOL(transport_release_cmd); void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) { - if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) + if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) { + if (wait_for_tasks && cmd->se_tmr_req) + transport_wait_for_tasks(cmd); + transport_release_cmd(cmd); - else { + } else { + if (wait_for_tasks) + transport_wait_for_tasks(cmd); + core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd); if (cmd->se_lun) transport_lun_remove_cmd(cmd); - if (wait_for_tasks && cmd->transport_wait_for_tasks) - cmd->transport_wait_for_tasks(cmd, 0); - transport_free_dev_tasks(cmd); transport_put_cmd(cmd); @@ -4322,13 +4305,6 @@ void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks) } EXPORT_SYMBOL(transport_generic_free_cmd); -static void transport_nop_wait_for_tasks( - struct se_cmd *cmd, - int remove_cmd) -{ - return; -} - /* transport_lun_wait_for_tasks(): * * Called from ConfigFS context to stop the passed struct se_cmd to allow @@ -4498,21 +4474,30 @@ int transport_clear_lun_from_sessions(struct se_lun *lun) return 0; } -/* transport_generic_wait_for_tasks(): +/** + * transport_wait_for_tasks - wait for completion to occur + * @cmd: command to wait * - * Called from frontend or passthrough context to wait for storage engine - * to pause and/or release frontend generated struct se_cmd. + * Called from frontend fabric context to wait for storage engine + * to pause and/or release frontend generated struct se_cmd. */ -static void transport_generic_wait_for_tasks( - struct se_cmd *cmd, - int remove_cmd) +void transport_wait_for_tasks(struct se_cmd *cmd) { unsigned long flags; - if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) - return; - spin_lock_irqsave(&cmd->t_state_lock, flags); + if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) && !(cmd->se_tmr_req)) { + spin_unlock_irqrestore(&cmd->t_state_lock, flags); + return; + } + /* + * Only perform a possible wait_for_tasks if SCF_SUPPORTED_SAM_OPCODE + * has been set in transport_set_supported_SAM_opcode(). + */ + if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) && !cmd->se_tmr_req) { + spin_unlock_irqrestore(&cmd->t_state_lock, flags); + return; + } /* * If we are already stopped due to an external event (ie: LUN shutdown) * sleep until the connection can have the passed struct se_cmd back. @@ -4552,8 +4537,10 @@ static void transport_generic_wait_for_tasks( atomic_set(&cmd->transport_lun_stop, 0); } if (!atomic_read(&cmd->t_transport_active) || - atomic_read(&cmd->t_transport_aborted)) - goto remove; + atomic_read(&cmd->t_transport_aborted)) { + spin_unlock_irqrestore(&cmd->t_state_lock, flags); + return; + } atomic_set(&cmd->t_transport_stop, 1); @@ -4576,13 +4563,10 @@ static void transport_generic_wait_for_tasks( pr_debug("wait_for_tasks: Stopped wait_for_compltion(" "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n", cmd->se_tfo->get_task_tag(cmd)); -remove: - spin_unlock_irqrestore(&cmd->t_state_lock, flags); - if (!remove_cmd) - return; - transport_generic_free_cmd(cmd, 0); + spin_unlock_irqrestore(&cmd->t_state_lock, flags); } +EXPORT_SYMBOL(transport_wait_for_tasks); static int transport_get_sense_codes( struct se_cmd *cmd, |