diff options
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 659 | ||||
| -rw-r--r-- | drivers/target/iscsi/iscsi_target_configfs.c | 7 | ||||
| -rw-r--r-- | drivers/target/iscsi/iscsi_target_device.c | 7 | ||||
| -rw-r--r-- | drivers/target/iscsi/iscsi_target_tmr.c | 1 |
4 files changed, 370 insertions, 304 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 40bb916f57ff..ffbc6a94be52 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -70,8 +70,7 @@ struct kmem_cache *lio_ooo_cache; struct kmem_cache *lio_r2t_cache; static int iscsit_handle_immediate_data(struct iscsi_cmd *, - unsigned char *buf, u32); -static int iscsit_logout_post_handler(struct iscsi_cmd *, struct iscsi_conn *); + struct iscsi_scsi_req *, u32); struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf) { @@ -482,6 +481,15 @@ int iscsit_del_np(struct iscsi_np *np) return 0; } +static int iscsit_immediate_queue(struct iscsi_conn *, struct iscsi_cmd *, int); +static int iscsit_response_queue(struct iscsi_conn *, struct iscsi_cmd *, int); + +static int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd) +{ + iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); + return 0; +} + static struct iscsit_transport iscsi_target_transport = { .name = "iSCSI/TCP", .transport_type = ISCSI_TCP, @@ -493,6 +501,10 @@ static struct iscsit_transport iscsi_target_transport = { .iscsit_get_login_rx = iscsit_get_login_rx, .iscsit_put_login_tx = iscsit_put_login_tx, .iscsit_get_dataout = iscsit_build_r2ts_for_cmd, + .iscsit_immediate_queue = iscsit_immediate_queue, + .iscsit_response_queue = iscsit_response_queue, + .iscsit_queue_data_in = iscsit_queue_rsp, + .iscsit_queue_status = iscsit_queue_rsp, }; static int __init iscsi_target_init_module(void) @@ -651,14 +663,6 @@ static int iscsit_add_reject( iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); ret = wait_for_completion_interruptible(&cmd->reject_comp); - /* - * Perform the kref_put now if se_cmd has been setup by - * iscsit_setup_scsi_cmd() - */ - if (cmd->se_cmd.se_tfo != NULL) { - pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n"); - target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); - } if (ret != 0) return -1; @@ -2549,18 +2553,60 @@ static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) } } -static int iscsit_send_data_in( - struct iscsi_cmd *cmd, - struct iscsi_conn *conn) +static void +iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, + struct iscsi_datain *datain, struct iscsi_data_rsp *hdr, + bool set_statsn) { - int iov_ret = 0, set_statsn = 0; - u32 iov_count = 0, tx_size = 0; + hdr->opcode = ISCSI_OP_SCSI_DATA_IN; + hdr->flags = datain->flags; + if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { + if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { + hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; + hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); + } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { + hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; + hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); + } + } + hton24(hdr->dlength, datain->length); + if (hdr->flags & ISCSI_FLAG_DATA_ACK) + int_to_scsilun(cmd->se_cmd.orig_fe_lun, + (struct scsi_lun *)&hdr->lun); + else + put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); + + hdr->itt = cmd->init_task_tag; + + if (hdr->flags & ISCSI_FLAG_DATA_ACK) + hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); + else + hdr->ttt = cpu_to_be32(0xFFFFFFFF); + if (set_statsn) + hdr->statsn = cpu_to_be32(cmd->stat_sn); + else + hdr->statsn = cpu_to_be32(0xFFFFFFFF); + + hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); + hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); + hdr->datasn = cpu_to_be32(datain->data_sn); + hdr->offset = cpu_to_be32(datain->offset); + + pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," + " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", + cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), + ntohl(hdr->offset), datain->length, conn->cid); +} + +static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn) +{ + struct iscsi_data_rsp *hdr = (struct iscsi_data_rsp *)&cmd->pdu[0]; struct iscsi_datain datain; struct iscsi_datain_req *dr; - struct iscsi_data_rsp *hdr; struct kvec *iov; - int eodr = 0; - int ret; + u32 iov_count = 0, tx_size = 0; + int eodr = 0, ret, iov_ret; + bool set_statsn = false; memset(&datain, 0, sizeof(struct iscsi_datain)); dr = iscsit_get_datain_values(cmd, &datain); @@ -2569,7 +2615,6 @@ static int iscsit_send_data_in( cmd->init_task_tag); return -1; } - /* * Be paranoid and double check the logic for now. */ @@ -2577,7 +2622,7 @@ static int iscsit_send_data_in( pr_err("Command ITT: 0x%08x, datain.offset: %u and" " datain.length: %u exceeds cmd->data_length: %u\n", cmd->init_task_tag, datain.offset, datain.length, - cmd->se_cmd.data_length); + cmd->se_cmd.data_length); return -1; } @@ -2601,47 +2646,13 @@ static int iscsit_send_data_in( (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { iscsit_increment_maxcmdsn(cmd, conn->sess); cmd->stat_sn = conn->stat_sn++; - set_statsn = 1; + set_statsn = true; } else if (dr->dr_complete == - DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) - set_statsn = 1; + DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) + set_statsn = true; } - hdr = (struct iscsi_data_rsp *) cmd->pdu; - memset(hdr, 0, ISCSI_HDR_LEN); - hdr->opcode = ISCSI_OP_SCSI_DATA_IN; - hdr->flags = datain.flags; - if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { - if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { - hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; - hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); - } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { - hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; - hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); - } - } - hton24(hdr->dlength, datain.length); - if (hdr->flags & ISCSI_FLAG_DATA_ACK) - int_to_scsilun(cmd->se_cmd.orig_fe_lun, - (struct scsi_lun *)&hdr->lun); - else - put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); - - hdr->itt = cmd->init_task_tag; - - if (hdr->flags & ISCSI_FLAG_DATA_ACK) - hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); - else - hdr->ttt = cpu_to_be32(0xFFFFFFFF); - if (set_statsn) - hdr->statsn = cpu_to_be32(cmd->stat_sn); - else - hdr->statsn = cpu_to_be32(0xFFFFFFFF); - - hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); - hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); - hdr->datasn = cpu_to_be32(datain.data_sn); - hdr->offset = cpu_to_be32(datain.offset); + iscsit_build_datain_pdu(cmd, conn, &datain, hdr, set_statsn); iov = &cmd->iov_data[0]; iov[iov_count].iov_base = cmd->pdu; @@ -2652,7 +2663,7 @@ static int iscsit_send_data_in( u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, + (unsigned char *)cmd->pdu, ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); iov[0].iov_len += ISCSI_CRC_LEN; @@ -2662,7 +2673,8 @@ static int iscsit_send_data_in( " for DataIN PDU 0x%08x\n", *header_digest); } - iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], datain.offset, datain.length); + iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], + datain.offset, datain.length); if (iov_ret < 0) return -1; @@ -2693,11 +2705,6 @@ static int iscsit_send_data_in( cmd->iov_data_count = iov_count; cmd->tx_size = tx_size; - pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," - " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", - cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), - ntohl(hdr->offset), datain.length, conn->cid); - /* sendpage is preferred but can't insert markers */ if (!conn->conn_ops->IFMarker) ret = iscsit_fe_sendpage_sg(cmd, conn); @@ -2720,16 +2727,13 @@ static int iscsit_send_data_in( return eodr; } -static int iscsit_send_logout_response( - struct iscsi_cmd *cmd, - struct iscsi_conn *conn) +int +iscsit_build_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, + struct iscsi_logout_rsp *hdr) { - int niov = 0, tx_size; struct iscsi_conn *logout_conn = NULL; struct iscsi_conn_recovery *cr = NULL; struct iscsi_session *sess = conn->sess; - struct kvec *iov; - struct iscsi_logout_rsp *hdr; /* * The actual shutting down of Sessions and/or Connections * for CLOSESESSION and CLOSECONNECTION Logout Requests @@ -2798,9 +2802,6 @@ static int iscsit_send_logout_response( return -1; } - tx_size = ISCSI_HDR_LEN; - hdr = (struct iscsi_logout_rsp *)cmd->pdu; - memset(hdr, 0, ISCSI_HDR_LEN); hdr->opcode = ISCSI_OP_LOGOUT_RSP; hdr->flags |= ISCSI_FLAG_CMD_FINAL; hdr->response = cmd->logout_response; @@ -2812,6 +2813,27 @@ static int iscsit_send_logout_response( hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); + pr_debug("Built Logout Response ITT: 0x%08x StatSN:" + " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", + cmd->init_task_tag, cmd->stat_sn, hdr->response, + cmd->logout_cid, conn->cid); + + return 0; +} +EXPORT_SYMBOL(iscsit_build_logout_rsp); + +static int +iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn) +{ + struct kvec *iov; + int niov = 0, tx_size, rc; + + rc = iscsit_build_logout_rsp(cmd, conn, + (struct iscsi_logout_rsp *)&cmd->pdu[0]); + if (rc < 0) + return rc; + + tx_size = ISCSI_HDR_LEN; iov = &cmd->iov_misc[0]; iov[niov].iov_base = cmd->pdu; iov[niov++].iov_len = ISCSI_HDR_LEN; @@ -2820,7 +2842,7 @@ static int iscsit_send_logout_response( u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, + (unsigned char *)&cmd->pdu[0], ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); iov[0].iov_len += ISCSI_CRC_LEN; @@ -2831,14 +2853,37 @@ static int iscsit_send_logout_response( cmd->iov_misc_count = niov; cmd->tx_size = tx_size; - pr_debug("Sending Logout Response ITT: 0x%08x StatSN:" - " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", - cmd->init_task_tag, cmd->stat_sn, hdr->response, - cmd->logout_cid, conn->cid); - return 0; } +void +iscsit_build_nopin_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, + struct iscsi_nopin *hdr, bool nopout_response) +{ + hdr->opcode = ISCSI_OP_NOOP_IN; + hdr->flags |= ISCSI_FLAG_CMD_FINAL; + hton24(hdr->dlength, cmd->buf_ptr_size); + if (nopout_response) + put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); + hdr->itt = cmd->init_task_tag; + hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); + cmd->stat_sn = (nopout_response) ? conn->stat_sn++ : + conn->stat_sn; + hdr->statsn = cpu_to_be32(cmd->stat_sn); + + if (nopout_response) + iscsit_increment_maxcmdsn(cmd, conn->sess); + + hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); + hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); + + pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x," + " StatSN: 0x%08x, Length %u\n", (nopout_response) ? + "Solicitied" : "Unsolicitied", cmd->init_task_tag, + cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); +} +EXPORT_SYMBOL(iscsit_build_nopin_rsp); + /* * Unsolicited NOPIN, either requesting a response or not. */ @@ -2847,20 +2892,10 @@ static int iscsit_send_unsolicited_nopin( struct iscsi_conn *conn, int want_response) { - int tx_size = ISCSI_HDR_LEN; - struct iscsi_nopin *hdr; - int ret; + struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; + int tx_size = ISCSI_HDR_LEN, ret; - hdr = (struct iscsi_nopin *) cmd->pdu; - memset(hdr, 0, ISCSI_HDR_LEN); - hdr->opcode = ISCSI_OP_NOOP_IN; - hdr->flags |= ISCSI_FLAG_CMD_FINAL; - hdr->itt = cmd->init_task_tag; - hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); - cmd->stat_sn = conn->stat_sn; - hdr->statsn = cpu_to_be32(cmd->stat_sn); - hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); - hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); + iscsit_build_nopin_rsp(cmd, conn, hdr, false); if (conn->conn_ops->HeaderDigest) { u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; @@ -2896,31 +2931,17 @@ static int iscsit_send_unsolicited_nopin( return 0; } -static int iscsit_send_nopin_response( - struct iscsi_cmd *cmd, - struct iscsi_conn *conn) +static int +iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn) { - int niov = 0, tx_size; - u32 padding = 0; + struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; struct kvec *iov; - struct iscsi_nopin *hdr; - - tx_size = ISCSI_HDR_LEN; - hdr = (struct iscsi_nopin *) cmd->pdu; - memset(hdr, 0, ISCSI_HDR_LEN); - hdr->opcode = ISCSI_OP_NOOP_IN; - hdr->flags |= ISCSI_FLAG_CMD_FINAL; - hton24(hdr->dlength, cmd->buf_ptr_size); - put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); - hdr->itt = cmd->init_task_tag; - hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); - cmd->stat_sn = conn->stat_sn++; - hdr->statsn = cpu_to_be32(cmd->stat_sn); + u32 padding = 0; + int niov = 0, tx_size; - iscsit_increment_maxcmdsn(cmd, conn->sess); - hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); - hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); + iscsit_build_nopin_rsp(cmd, conn, hdr, true); + tx_size = ISCSI_HDR_LEN; iov = &cmd->iov_misc[0]; iov[niov].iov_base = cmd->pdu; iov[niov++].iov_len = ISCSI_HDR_LEN; @@ -2976,10 +2997,6 @@ static int iscsit_send_nopin_response( cmd->iov_misc_count = niov; cmd->tx_size = tx_size; - pr_debug("Sending NOPIN Response ITT: 0x%08x, TTT:" - " 0x%08x, StatSN: 0x%08x, Length %u\n", cmd->init_task_tag, - cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); - return 0; } @@ -3140,24 +3157,16 @@ int iscsit_build_r2ts_for_cmd( return 0; } -static int iscsit_send_status( - struct iscsi_cmd *cmd, - struct iscsi_conn *conn) +void iscsit_build_rsp_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, + bool inc_stat_sn, struct iscsi_scsi_rsp *hdr) { - u8 iov_count = 0, recovery; - u32 padding = 0, tx_size = 0; - struct iscsi_scsi_rsp *hdr; - struct kvec *iov; - - recovery = (cmd->i_state != ISTATE_SEND_STATUS); - if (!recovery) + if (inc_stat_sn) cmd->stat_sn = conn->stat_sn++; spin_lock_bh(&conn->sess->session_stats_lock); conn->sess->rsp_pdus++; spin_unlock_bh(&conn->sess->session_stats_lock); - hdr = (struct iscsi_scsi_rsp *) cmd->pdu; memset(hdr, 0, ISCSI_HDR_LEN); hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; hdr->flags |= ISCSI_FLAG_CMD_FINAL; @@ -3177,6 +3186,23 @@ static int iscsit_send_status( hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); + pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x," + " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", + cmd->init_task_tag, cmd->stat_sn, cmd->se_cmd.scsi_status, + cmd->se_cmd.scsi_status, conn->cid); +} +EXPORT_SYMBOL(iscsit_build_rsp_pdu); + +static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn) +{ + struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)&cmd->pdu[0]; + struct kvec *iov; + u32 padding = 0, tx_size = 0; + int iov_count = 0; + bool inc_stat_sn = (cmd->i_state == ISTATE_SEND_STATUS); + + iscsit_build_rsp_pdu(cmd, conn, inc_stat_sn, hdr); + iov = &cmd->iov_misc[0]; iov[iov_count].iov_base = cmd->pdu; iov[iov_count++].iov_len = ISCSI_HDR_LEN; @@ -3231,7 +3257,7 @@ static int iscsit_send_status( u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, + (unsigned char *)cmd->pdu, ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); iov[0].iov_len += ISCSI_CRC_LEN; @@ -3243,11 +3269,6 @@ static int iscsit_send_status( cmd->iov_misc_count = iov_count; cmd->tx_size = tx_size; - pr_debug("Built %sSCSI Response, ITT: 0x%08x, StatSN: 0x%08x," - " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", - (!recovery) ? "" : "Recovery ", cmd->init_task_tag, - cmd->stat_sn, 0x00, cmd->se_cmd.scsi_status, conn->cid); - return 0; } @@ -3270,16 +3291,12 @@ static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) } } -static int iscsit_send_task_mgt_rsp( - struct iscsi_cmd *cmd, - struct iscsi_conn *conn) +void +iscsit_build_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, + struct iscsi_tm_rsp *hdr) { struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; - struct iscsi_tm_rsp *hdr; - u32 tx_size = 0; - hdr = (struct iscsi_tm_rsp *) cmd->pdu; - memset(hdr, 0, ISCSI_HDR_LEN); hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; hdr->flags = ISCSI_FLAG_CMD_FINAL; hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); @@ -3291,6 +3308,20 @@ static int iscsit_send_task_mgt_rsp( hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); + pr_debug("Built Task Management Response ITT: 0x%08x," + " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", + cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); +} +EXPORT_SYMBOL(iscsit_build_task_mgt_rsp); + +static int +iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) +{ + struct iscsi_tm_rsp *hdr = (struct iscsi_tm_rsp *)&cmd->pdu[0]; + u32 tx_size = 0; + + iscsit_build_task_mgt_rsp(cmd, conn, hdr); + cmd->iov_misc[0].iov_base = cmd->pdu; cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; tx_size += ISCSI_HDR_LEN; @@ -3311,10 +3342,6 @@ static int iscsit_send_task_mgt_rsp( cmd->iov_misc_count = 1; cmd->tx_size = tx_size; - pr_debug("Built Task Management Response ITT: 0x%08x," - " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", - cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); - return 0; } @@ -3510,6 +3537,22 @@ static int iscsit_send_text_rsp( return 0; } +void +iscsit_build_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn, + struct iscsi_reject *hdr) +{ + hdr->opcode = ISCSI_OP_REJECT; + hdr->flags |= ISCSI_FLAG_CMD_FINAL; + hton24(hdr->dlength, ISCSI_HDR_LEN); + hdr->ffffffff = cpu_to_be32(0xffffffff); + cmd->stat_sn = conn->stat_sn++; + hdr->statsn = cpu_to_be32(cmd->stat_sn); + hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); + hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); + +} +EXPORT_SYMBOL(iscsit_build_reject); + static int iscsit_send_reject( struct iscsi_cmd *cmd, struct iscsi_conn *conn) @@ -3518,18 +3561,9 @@ static int iscsit_send_reject( struct iscsi_reject *hdr; struct kvec *iov; - hdr = (struct iscsi_reject *) cmd->pdu; - hdr->opcode = ISCSI_OP_REJECT; - hdr->flags |= ISCSI_FLAG_CMD_FINAL; - hton24(hdr->dlength, ISCSI_HDR_LEN); - hdr->ffffffff = cpu_to_be32(0xffffffff); - cmd->stat_sn = conn->stat_sn++; - hdr->statsn = cpu_to_be32(cmd->stat_sn); - hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); - hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); + iscsit_build_reject(cmd, conn, (struct iscsi_reject *)&cmd->pdu[0]); iov = &cmd->iov_misc[0]; - iov[iov_count].iov_base = cmd->pdu; iov[iov_count++].iov_len = ISCSI_HDR_LEN; iov[iov_count].iov_base = cmd->buf_ptr; @@ -3626,55 +3660,41 @@ static inline void iscsit_thread_check_cpumask( set_cpus_allowed_ptr(p, conn->conn_cpumask); } -static int handle_immediate_queue(struct iscsi_conn *conn) +static int +iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) { - struct iscsi_queue_req *qr; - struct iscsi_cmd *cmd; - u8 state; int ret; - while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { - atomic_set(&conn->check_immediate_queue, 0); - cmd = qr->cmd; - state = qr->state; - kmem_cache_free(lio_qr_cache, qr); - - switch (state) { - case ISTATE_SEND_R2T: - ret = iscsit_send_r2t(cmd, conn); - if (ret < 0) - goto err; - break; - case ISTATE_REMOVE: - if (cmd->data_direction == DMA_TO_DEVICE) - iscsit_stop_dataout_timer(cmd); - - spin_lock_bh(&conn->cmd_lock); - list_del(&cmd->i_conn_node); - spin_unlock_bh(&conn->cmd_lock); + switch (state) { + case ISTATE_SEND_R2T: + ret = iscsit_send_r2t(cmd, conn); + if (ret < 0) + goto err; + break; + case ISTATE_REMOVE: + spin_lock_bh(&conn->cmd_lock); + list_del(&cmd->i_conn_node); + spin_unlock_bh(&conn->cmd_lock); - iscsit_free_cmd(cmd); - continue; - case ISTATE_SEND_NOPIN_WANT_RESPONSE: - iscsit_mod_nopin_response_timer(conn); - ret = iscsit_send_unsolicited_nopin(cmd, - conn, 1); - if (ret < 0) - goto err; - break; - case ISTATE_SEND_NOPIN_NO_RESPONSE: - ret = iscsit_send_unsolicited_nopin(cmd, - conn, 0); - if (ret < 0) - goto err; - break; - default: - pr_err("Unknown Opcode: 0x%02x ITT:" - " 0x%08x, i_state: %d on CID: %hu\n", - cmd->iscsi_opcode, cmd->init_task_tag, state, - conn->cid); + iscsit_free_cmd(cmd); + break; + case ISTATE_SEND_NOPIN_WANT_RESPONSE: + iscsit_mod_nopin_response_timer(conn); + ret = iscsit_send_unsolicited_nopin(cmd, conn, 1); + if (ret < 0) goto err; - } + break; + case ISTATE_SEND_NOPIN_NO_RESPONSE: + ret = iscsit_send_unsolicited_nopin(cmd, conn, 0); + if (ret < 0) + goto err; + break; + default: + pr_err("Unknown Opcode: 0x%02x ITT:" + " 0x%08x, i_state: %d on CID: %hu\n", + cmd->iscsi_opcode, cmd->init_task_tag, state, + conn->cid); + goto err; } return 0; @@ -3683,128 +3703,143 @@ err: return -1; } -static int handle_response_queue(struct iscsi_conn *conn) +static int +iscsit_handle_immediate_queue(struct iscsi_conn *conn) { + struct iscsit_transport *t = conn->conn_transport; struct iscsi_queue_req *qr; struct iscsi_cmd *cmd; u8 state; int ret; - while ((qr = iscsit_get_cmd_from_response_queue(conn))) { + while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { + atomic_set(&conn->check_immediate_queue, 0); cmd = qr->cmd; state = qr->state; kmem_cache_free(lio_qr_cache, qr); -check_rsp_state: - switch (state) { - case ISTATE_SEND_DATAIN: - ret = iscsit_send_data_in(cmd, conn); - if (ret < 0) - goto err; - else if (!ret) - /* more drs */ - goto check_rsp_state; - else if (ret == 1) { - /* all done */ - spin_lock_bh(&cmd->istate_lock); - cmd->i_state = ISTATE_SENT_STATUS; - spin_unlock_bh(&cmd->istate_lock); - - if (atomic_read(&conn->check_immediate_queue)) - return 1; + ret = t->iscsit_immediate_queue(conn, cmd, state); + if (ret < 0) + return ret; + } - continue; - } else if (ret == 2) { - /* Still must send status, - SCF_TRANSPORT_TASK_SENSE was set */ - spin_lock_bh(&cmd->istate_lock); - cmd->i_state = ISTATE_SEND_STATUS; - spin_unlock_bh(&cmd->istate_lock); - state = ISTATE_SEND_STATUS; - goto check_rsp_state; - } + return 0; +} - break; - case ISTATE_SEND_STATUS: - case ISTATE_SEND_STATUS_RECOVERY: - ret = iscsit_send_status(cmd, conn); - break; - case ISTATE_SEND_LOGOUTRSP: - ret = iscsit_send_logout_response(cmd, conn); - break; - case ISTATE_SEND_ASYNCMSG: - ret = iscsit_send_conn_drop_async_message( - cmd, conn); - break; - case ISTATE_SEND_NOPIN: - ret = iscsit_send_nopin_response(cmd, conn); - break; - case ISTATE_SEND_REJECT: - ret = iscsit_send_reject(cmd, conn); - break; - case ISTATE_SEND_TASKMGTRSP: - ret = iscsit_send_task_mgt_rsp(cmd, conn); - if (ret != 0) - break; - ret = iscsit_tmr_post_handler(cmd, conn); - if (ret != 0) - iscsit_fall_back_to_erl0(conn->sess); - break; - case ISTATE_SEND_TEXTRSP: - ret = iscsit_send_text_rsp(cmd, conn); - break; - default: - pr_err("Unknown Opcode: 0x%02x ITT:" - " 0x%08x, i_state: %d on CID: %hu\n", - cmd->iscsi_opcode, cmd->init_task_tag, - state, conn->cid); - goto err; - } +static int +iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) +{ + int ret; + +check_rsp_state: + switch (state) { + case ISTATE_SEND_DATAIN: + ret = iscsit_send_datain(cmd, conn); if (ret < 0) goto err; + else if (!ret) + /* more drs */ + goto check_rsp_state; + else if (ret == 1) { + /* all done */ + spin_lock_bh(&cmd->istate_lock); + cmd->i_state = ISTATE_SENT_STATUS; + spin_unlock_bh(&cmd->istate_lock); - if (iscsit_send_tx_data(cmd, conn, 1) < 0) { - iscsit_tx_thread_wait_for_tcp(conn); - iscsit_unmap_iovec(cmd); - goto err; - } - iscsit_unmap_iovec(cmd); + if (atomic_read(&conn->check_immediate_queue)) + return 1; - switch (state) { - case ISTATE_SEND_LOGOUTRSP: - if (!iscsit_logout_post_handler(cmd, conn)) - goto restart; - /* fall through */ - case ISTATE_SEND_STATUS: - case ISTATE_SEND_ASYNCMSG: - case ISTATE_SEND_NOPIN: - case ISTATE_SEND_STATUS_RECOVERY: - case ISTATE_SEND_TEXTRSP: - case ISTATE_SEND_TASKMGTRSP: + return 0; + } else if (ret == 2) { + /* Still must send status, + SCF_TRANSPORT_TASK_SENSE was set */ spin_lock_bh(&cmd->istate_lock); - cmd->i_state = ISTATE_SENT_STATUS; + cmd->i_state = ISTATE_SEND_STATUS; spin_unlock_bh(&cmd->istate_lock); + state = ISTATE_SEND_STATUS; + goto check_rsp_state; + } + + break; + case ISTATE_SEND_STATUS: + case ISTATE_SEND_STATUS_RECOVERY: + ret = iscsit_send_response(cmd, conn); + break; + case ISTATE_SEND_LOGOUTRSP: + ret = iscsit_send_logout(cmd, conn); + break; + case ISTATE_SEND_ASYNCMSG: + ret = iscsit_send_conn_drop_async_message( + cmd, conn); + break; + case ISTATE_SEND_NOPIN: + ret = iscsit_send_nopin(cmd, conn); + break; + case ISTATE_SEND_REJECT: + ret = iscsit_send_reject(cmd, conn); + break; + case ISTATE_SEND_TASKMGTRSP: + ret = iscsit_send_task_mgt_rsp(cmd, conn); + if (ret != 0) break; - case ISTATE_SEND_REJECT: - if (cmd->cmd_flags & ICF_REJECT_FAIL_CONN) { - cmd->cmd_flags &= ~ICF_REJECT_FAIL_CONN; - complete(&cmd->reject_comp); - goto err; - } + ret = iscsit_tmr_post_handler(cmd, conn); + if (ret != 0) + iscsit_fall_back_to_erl0(conn->sess); + break; + case ISTATE_SEND_TEXTRSP: + ret = iscsit_send_text_rsp(cmd, conn); + break; + default: + pr_err("Unknown Opcode: 0x%02x ITT:" + " 0x%08x, i_state: %d on CID: %hu\n", + cmd->iscsi_opcode, cmd->init_task_tag, + state, conn->cid); + goto err; + } + if (ret < 0) + goto err; + + if (iscsit_send_tx_data(cmd, conn, 1) < 0) { + iscsit_tx_thread_wait_for_tcp(conn); + iscsit_unmap_iovec(cmd); + goto err; + } + iscsit_unmap_iovec(cmd); + + switch (state) { + case ISTATE_SEND_LOGOUTRSP: + if (!iscsit_logout_post_handler(cmd, conn)) + goto restart; + /* fall through */ + case ISTATE_SEND_STATUS: + case ISTATE_SEND_ASYNCMSG: + case ISTATE_SEND_NOPIN: + case ISTATE_SEND_STATUS_RECOVERY: + case ISTATE_SEND_TEXTRSP: + case ISTATE_SEND_TASKMGTRSP: + spin_lock_bh(&cmd->istate_lock); + cmd->i_state = ISTATE_SENT_STATUS; + spin_unlock_bh(&cmd->istate_lock); + break; + case ISTATE_SEND_REJECT: + if (cmd->cmd_flags & ICF_REJECT_FAIL_CONN) { + cmd->cmd_flags &= ~ICF_REJECT_FAIL_CONN; complete(&cmd->reject_comp); - break; - default: - pr_err("Unknown Opcode: 0x%02x ITT:" - " 0x%08x, i_state: %d on CID: %hu\n", - cmd->iscsi_opcode, cmd->init_task_tag, - cmd->i_state, conn->cid); goto err; } - - if (atomic_read(&conn->check_immediate_queue)) - return 1; + complete(&cmd->reject_comp); + break; + default: + pr_err("Unknown Opcode: 0x%02x ITT:" + " 0x%08x, i_state: %d on CID: %hu\n", + cmd->iscsi_opcode, cmd->init_task_tag, + cmd->i_state, conn->cid); + goto err; } + if (atomic_read(&conn->check_immediate_queue)) + return 1; + return 0; err: @@ -3813,6 +3848,27 @@ restart: return -EAGAIN; } +static int iscsit_handle_response_queue(struct iscsi_conn *conn) +{ + struct iscsit_transport *t = conn->conn_transport; + struct iscsi_queue_req *qr; + struct iscsi_cmd *cmd; + u8 state; + int ret; + + while ((qr = iscsit_get_cmd_from_response_queue(conn))) { + cmd = qr->cmd; + state = qr->state; + kmem_cache_free(lio_qr_cache, qr); + + ret = t->iscsit_response_queue(conn, cmd, state); + if (ret == 1 || ret < 0) + return ret; + } + + return 0; +} + int iscsi_target_tx_thread(void *arg) { int ret = 0; @@ -3847,11 +3903,11 @@ restart: goto transport_err; get_immediate: - ret = handle_immediate_queue(conn); + ret = iscsit_handle_immediate_queue(conn); if (ret < 0) goto transport_err; - ret = handle_response_queue(conn); + ret = iscsit_handle_response_queue(conn); if (ret == 1) goto get_immediate; else if (ret == -EAGAIN) @@ -4451,7 +4507,7 @@ static void iscsit_logout_post_handler_diffcid( /* * Return of 0 causes the TX thread to restart. */ -static int iscsit_logout_post_handler( +int iscsit_logout_post_handler( struct iscsi_cmd *cmd, struct iscsi_conn *conn) { @@ -4509,6 +4565,7 @@ static int iscsit_logout_post_handler( } return ret; } +EXPORT_SYMBOL(iscsit_logout_post_handler); void iscsit_fail_session(struct iscsi_session *sess) { diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c index ce3d3210fe41..2704daf6ba74 100644 --- a/drivers/target/iscsi/iscsi_target_configfs.c +++ b/drivers/target/iscsi/iscsi_target_configfs.c @@ -27,6 +27,7 @@ #include <target/target_core_fabric_configfs.h> #include <target/target_core_configfs.h> #include <target/configfs_macros.h> +#include <target/iscsi/iscsi_transport.h> #include "iscsi_target_core.h" #include "iscsi_target_parameters.h" @@ -1536,7 +1537,8 @@ static int lio_queue_data_in(struct se_cmd *se_cmd) struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd); cmd->i_state = ISTATE_SEND_DATAIN; - iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); + cmd->conn->conn_transport->iscsit_queue_data_in(cmd->conn, cmd); + return 0; } @@ -1568,7 +1570,8 @@ static int lio_queue_status(struct se_cmd *se_cmd) struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd); cmd->i_state = ISTATE_SEND_STATUS; - iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); + cmd->conn->conn_transport->iscsit_queue_status(cmd->conn, cmd); + return 0; } diff --git a/drivers/target/iscsi/iscsi_target_device.c b/drivers/target/iscsi/iscsi_target_device.c index bcc409853a67..1b74033510a0 100644 --- a/drivers/target/iscsi/iscsi_target_device.c +++ b/drivers/target/iscsi/iscsi_target_device.c @@ -60,8 +60,13 @@ void iscsit_increment_maxcmdsn(struct iscsi_cmd *cmd, struct iscsi_session *sess cmd->maxcmdsn_inc = 1; - mutex_lock(&sess->cmdsn_mutex); + if (!mutex_trylock(&sess->cmdsn_mutex)) { + sess->max_cmd_sn += 1; + pr_debug("Updated MaxCmdSN to 0x%08x\n", sess->max_cmd_sn); + return; + } sess->max_cmd_sn += 1; pr_debug("Updated MaxCmdSN to 0x%08x\n", sess->max_cmd_sn); mutex_unlock(&sess->cmdsn_mutex); } +EXPORT_SYMBOL(iscsit_increment_maxcmdsn); diff --git a/drivers/target/iscsi/iscsi_target_tmr.c b/drivers/target/iscsi/iscsi_target_tmr.c index 16ca0ef9266f..b997e5da47d3 100644 --- a/drivers/target/iscsi/iscsi_target_tmr.c +++ b/drivers/target/iscsi/iscsi_target_tmr.c @@ -472,6 +472,7 @@ int iscsit_tmr_post_handler(struct iscsi_cmd *cmd, struct iscsi_conn *conn) return 0; } +EXPORT_SYMBOL(iscsit_tmr_post_handler); /* * Nothing to do here, but leave it for good measure. :-) |