165e7ae7bSOr Gerlitz /* 265e7ae7bSOr Gerlitz * iSCSI Initiator over iSER Data-Path 365e7ae7bSOr Gerlitz * 465e7ae7bSOr Gerlitz * Copyright (C) 2004 Dmitry Yusupov 565e7ae7bSOr Gerlitz * Copyright (C) 2004 Alex Aizman 665e7ae7bSOr Gerlitz * Copyright (C) 2005 Mike Christie 765e7ae7bSOr Gerlitz * Copyright (c) 2005, 2006 Voltaire, Inc. All rights reserved. 865e7ae7bSOr Gerlitz * maintained by openib-general@openib.org 965e7ae7bSOr Gerlitz * 1065e7ae7bSOr Gerlitz * This software is available to you under a choice of one of two 1165e7ae7bSOr Gerlitz * licenses. You may choose to be licensed under the terms of the GNU 1265e7ae7bSOr Gerlitz * General Public License (GPL) Version 2, available from the file 1365e7ae7bSOr Gerlitz * COPYING in the main directory of this source tree, or the 1465e7ae7bSOr Gerlitz * OpenIB.org BSD license below: 1565e7ae7bSOr Gerlitz * 1665e7ae7bSOr Gerlitz * Redistribution and use in source and binary forms, with or 1765e7ae7bSOr Gerlitz * without modification, are permitted provided that the following 1865e7ae7bSOr Gerlitz * conditions are met: 1965e7ae7bSOr Gerlitz * 2065e7ae7bSOr Gerlitz * - Redistributions of source code must retain the above 2165e7ae7bSOr Gerlitz * copyright notice, this list of conditions and the following 2265e7ae7bSOr Gerlitz * disclaimer. 2365e7ae7bSOr Gerlitz * 2465e7ae7bSOr Gerlitz * - Redistributions in binary form must reproduce the above 2565e7ae7bSOr Gerlitz * copyright notice, this list of conditions and the following 2665e7ae7bSOr Gerlitz * disclaimer in the documentation and/or other materials 2765e7ae7bSOr Gerlitz * provided with the distribution. 2865e7ae7bSOr Gerlitz * 2965e7ae7bSOr Gerlitz * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 3065e7ae7bSOr Gerlitz * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 3165e7ae7bSOr Gerlitz * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 3265e7ae7bSOr Gerlitz * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 3365e7ae7bSOr Gerlitz * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 3465e7ae7bSOr Gerlitz * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 3565e7ae7bSOr Gerlitz * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 3665e7ae7bSOr Gerlitz * SOFTWARE. 3765e7ae7bSOr Gerlitz * 3865e7ae7bSOr Gerlitz * Credits: 3965e7ae7bSOr Gerlitz * Christoph Hellwig 4065e7ae7bSOr Gerlitz * FUJITA Tomonori 4165e7ae7bSOr Gerlitz * Arne Redlich 4265e7ae7bSOr Gerlitz * Zhenyu Wang 4365e7ae7bSOr Gerlitz * Modified by: 4465e7ae7bSOr Gerlitz * Erez Zilber 4565e7ae7bSOr Gerlitz */ 4665e7ae7bSOr Gerlitz 4765e7ae7bSOr Gerlitz #include <linux/types.h> 4865e7ae7bSOr Gerlitz #include <linux/list.h> 4965e7ae7bSOr Gerlitz #include <linux/hardirq.h> 5065e7ae7bSOr Gerlitz #include <linux/kfifo.h> 5165e7ae7bSOr Gerlitz #include <linux/blkdev.h> 5265e7ae7bSOr Gerlitz #include <linux/init.h> 5365e7ae7bSOr Gerlitz #include <linux/ioctl.h> 5465e7ae7bSOr Gerlitz #include <linux/cdev.h> 5565e7ae7bSOr Gerlitz #include <linux/in.h> 5665e7ae7bSOr Gerlitz #include <linux/net.h> 5765e7ae7bSOr Gerlitz #include <linux/scatterlist.h> 5865e7ae7bSOr Gerlitz #include <linux/delay.h> 5965e7ae7bSOr Gerlitz 6065e7ae7bSOr Gerlitz #include <net/sock.h> 6165e7ae7bSOr Gerlitz 6265e7ae7bSOr Gerlitz #include <asm/uaccess.h> 6365e7ae7bSOr Gerlitz 6465e7ae7bSOr Gerlitz #include <scsi/scsi_cmnd.h> 6565e7ae7bSOr Gerlitz #include <scsi/scsi_device.h> 6665e7ae7bSOr Gerlitz #include <scsi/scsi_eh.h> 6765e7ae7bSOr Gerlitz #include <scsi/scsi_tcq.h> 6865e7ae7bSOr Gerlitz #include <scsi/scsi_host.h> 6965e7ae7bSOr Gerlitz #include <scsi/scsi.h> 7065e7ae7bSOr Gerlitz #include <scsi/scsi_transport_iscsi.h> 7165e7ae7bSOr Gerlitz 7265e7ae7bSOr Gerlitz #include "iscsi_iser.h" 7365e7ae7bSOr Gerlitz 7475613521SMike Christie static struct scsi_host_template iscsi_iser_sht; 7575613521SMike Christie static struct iscsi_transport iscsi_iser_transport; 7675613521SMike Christie static struct scsi_transport_template *iscsi_iser_scsi_transport; 7775613521SMike Christie 7865e7ae7bSOr Gerlitz static unsigned int iscsi_max_lun = 512; 7965e7ae7bSOr Gerlitz module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO); 8065e7ae7bSOr Gerlitz 8165e7ae7bSOr Gerlitz int iser_debug_level = 0; 8265e7ae7bSOr Gerlitz 8365e7ae7bSOr Gerlitz MODULE_DESCRIPTION("iSER (iSCSI Extensions for RDMA) Datamover " 8465e7ae7bSOr Gerlitz "v" DRV_VER " (" DRV_DATE ")"); 8565e7ae7bSOr Gerlitz MODULE_LICENSE("Dual BSD/GPL"); 8665e7ae7bSOr Gerlitz MODULE_AUTHOR("Alex Nezhinsky, Dan Bar Dov, Or Gerlitz"); 8765e7ae7bSOr Gerlitz 8865e7ae7bSOr Gerlitz module_param_named(debug_level, iser_debug_level, int, 0644); 8965e7ae7bSOr Gerlitz MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:disabled)"); 9065e7ae7bSOr Gerlitz 9165e7ae7bSOr Gerlitz struct iser_global ig; 9265e7ae7bSOr Gerlitz 9365e7ae7bSOr Gerlitz void 9465e7ae7bSOr Gerlitz iscsi_iser_recv(struct iscsi_conn *conn, 9565e7ae7bSOr Gerlitz struct iscsi_hdr *hdr, char *rx_data, int rx_data_len) 9665e7ae7bSOr Gerlitz { 9765e7ae7bSOr Gerlitz int rc = 0; 9865e7ae7bSOr Gerlitz int datalen; 9965e7ae7bSOr Gerlitz int ahslen; 10065e7ae7bSOr Gerlitz 10165e7ae7bSOr Gerlitz /* verify PDU length */ 10265e7ae7bSOr Gerlitz datalen = ntoh24(hdr->dlength); 10365e7ae7bSOr Gerlitz if (datalen != rx_data_len) { 10465e7ae7bSOr Gerlitz printk(KERN_ERR "iscsi_iser: datalen %d (hdr) != %d (IB) \n", 10565e7ae7bSOr Gerlitz datalen, rx_data_len); 10665e7ae7bSOr Gerlitz rc = ISCSI_ERR_DATALEN; 10765e7ae7bSOr Gerlitz goto error; 10865e7ae7bSOr Gerlitz } 10965e7ae7bSOr Gerlitz 11065e7ae7bSOr Gerlitz /* read AHS */ 11165e7ae7bSOr Gerlitz ahslen = hdr->hlength * 4; 11265e7ae7bSOr Gerlitz 11365e7ae7bSOr Gerlitz rc = iscsi_complete_pdu(conn, hdr, rx_data, rx_data_len); 11465e7ae7bSOr Gerlitz if (rc && rc != ISCSI_ERR_NO_SCSI_CMD) 11565e7ae7bSOr Gerlitz goto error; 11665e7ae7bSOr Gerlitz 11765e7ae7bSOr Gerlitz return; 11865e7ae7bSOr Gerlitz error: 11965e7ae7bSOr Gerlitz iscsi_conn_failure(conn, rc); 12065e7ae7bSOr Gerlitz } 12165e7ae7bSOr Gerlitz 12265e7ae7bSOr Gerlitz 12365e7ae7bSOr Gerlitz /** 1242261ec3dSMike Christie * iscsi_iser_task_init - Initialize task 1252261ec3dSMike Christie * @task: iscsi task 12665e7ae7bSOr Gerlitz * 1272261ec3dSMike Christie * Initialize the task for the scsi command or mgmt command. 1282747fdb2SMike Christie */ 129a8ac6311SOlaf Kirch static int 1302261ec3dSMike Christie iscsi_iser_task_init(struct iscsi_task *task) 13165e7ae7bSOr Gerlitz { 1322261ec3dSMike Christie struct iscsi_iser_conn *iser_conn = task->conn->dd_data; 1332261ec3dSMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 13465e7ae7bSOr Gerlitz 1352261ec3dSMike Christie /* mgmt task */ 1362261ec3dSMike Christie if (!task->sc) { 1372261ec3dSMike Christie iser_task->desc.data = task->data; 1382747fdb2SMike Christie return 0; 1392747fdb2SMike Christie } 1402747fdb2SMike Christie 1412261ec3dSMike Christie iser_task->command_sent = 0; 1422261ec3dSMike Christie iser_task->iser_conn = iser_conn; 1432261ec3dSMike Christie iser_task_rdma_init(iser_task); 144a8ac6311SOlaf Kirch return 0; 14565e7ae7bSOr Gerlitz } 14665e7ae7bSOr Gerlitz 14765e7ae7bSOr Gerlitz /** 1482261ec3dSMike Christie * iscsi_iser_mtask_xmit - xmit management(immediate) task 14965e7ae7bSOr Gerlitz * @conn: iscsi connection 1502261ec3dSMike Christie * @task: task management task 15165e7ae7bSOr Gerlitz * 15265e7ae7bSOr Gerlitz * Notes: 15365e7ae7bSOr Gerlitz * The function can return -EAGAIN in which case caller must 15465e7ae7bSOr Gerlitz * call it again later, or recover. '0' return code means successful 15565e7ae7bSOr Gerlitz * xmit. 15665e7ae7bSOr Gerlitz * 15765e7ae7bSOr Gerlitz **/ 15865e7ae7bSOr Gerlitz static int 1592261ec3dSMike Christie iscsi_iser_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) 16065e7ae7bSOr Gerlitz { 16165e7ae7bSOr Gerlitz int error = 0; 16265e7ae7bSOr Gerlitz 1632261ec3dSMike Christie debug_scsi("task deq [cid %d itt 0x%x]\n", conn->id, task->itt); 16465e7ae7bSOr Gerlitz 1652261ec3dSMike Christie error = iser_send_control(conn, task); 16665e7ae7bSOr Gerlitz 1672261ec3dSMike Christie /* since iser xmits control with zero copy, tasks can not be recycled 16865e7ae7bSOr Gerlitz * right after sending them. 16965e7ae7bSOr Gerlitz * The recycling scheme is based on whether a response is expected 1702261ec3dSMike Christie * - if yes, the task is recycled at iscsi_complete_pdu 1712261ec3dSMike Christie * - if no, the task is recycled at iser_snd_completion 17265e7ae7bSOr Gerlitz */ 173f0938401SErez Zilber if (error && error != -ENOBUFS) 17465e7ae7bSOr Gerlitz iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); 17565e7ae7bSOr Gerlitz 17665e7ae7bSOr Gerlitz return error; 17765e7ae7bSOr Gerlitz } 17865e7ae7bSOr Gerlitz 17965e7ae7bSOr Gerlitz static int 1802747fdb2SMike Christie iscsi_iser_task_xmit_unsol_data(struct iscsi_conn *conn, 1812261ec3dSMike Christie struct iscsi_task *task) 18265e7ae7bSOr Gerlitz { 18365e7ae7bSOr Gerlitz struct iscsi_data hdr; 18465e7ae7bSOr Gerlitz int error = 0; 18565e7ae7bSOr Gerlitz 18665e7ae7bSOr Gerlitz /* Send data-out PDUs while there's still unsolicited data to send */ 1872261ec3dSMike Christie while (task->unsol_count > 0) { 1882261ec3dSMike Christie iscsi_prep_unsolicit_data_pdu(task, &hdr); 18965e7ae7bSOr Gerlitz debug_scsi("Sending data-out: itt 0x%x, data count %d\n", 1902261ec3dSMike Christie hdr.itt, task->data_count); 19165e7ae7bSOr Gerlitz 19265e7ae7bSOr Gerlitz /* the buffer description has been passed with the command */ 19365e7ae7bSOr Gerlitz /* Send the command */ 1942261ec3dSMike Christie error = iser_send_data_out(conn, task, &hdr); 19565e7ae7bSOr Gerlitz if (error) { 1962261ec3dSMike Christie task->unsol_datasn--; 1972747fdb2SMike Christie goto iscsi_iser_task_xmit_unsol_data_exit; 19865e7ae7bSOr Gerlitz } 1992261ec3dSMike Christie task->unsol_count -= task->data_count; 20065e7ae7bSOr Gerlitz debug_scsi("Need to send %d more as data-out PDUs\n", 2012261ec3dSMike Christie task->unsol_count); 20265e7ae7bSOr Gerlitz } 20365e7ae7bSOr Gerlitz 2042747fdb2SMike Christie iscsi_iser_task_xmit_unsol_data_exit: 20565e7ae7bSOr Gerlitz return error; 20665e7ae7bSOr Gerlitz } 20765e7ae7bSOr Gerlitz 20865e7ae7bSOr Gerlitz static int 2092261ec3dSMike Christie iscsi_iser_task_xmit(struct iscsi_task *task) 21065e7ae7bSOr Gerlitz { 2112261ec3dSMike Christie struct iscsi_conn *conn = task->conn; 2122261ec3dSMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 21365e7ae7bSOr Gerlitz int error = 0; 21465e7ae7bSOr Gerlitz 2152261ec3dSMike Christie if (!task->sc) 2162261ec3dSMike Christie return iscsi_iser_mtask_xmit(conn, task); 2172747fdb2SMike Christie 2182261ec3dSMike Christie if (task->sc->sc_data_direction == DMA_TO_DEVICE) { 2192261ec3dSMike Christie BUG_ON(scsi_bufflen(task->sc) == 0); 22077a23c21SMike Christie 22177a23c21SMike Christie debug_scsi("cmd [itt %x total %d imm %d unsol_data %d\n", 2222261ec3dSMike Christie task->itt, scsi_bufflen(task->sc), 2232261ec3dSMike Christie task->imm_count, task->unsol_count); 22477a23c21SMike Christie } 22577a23c21SMike Christie 2262261ec3dSMike Christie debug_scsi("task deq [cid %d itt 0x%x]\n", 2272261ec3dSMike Christie conn->id, task->itt); 22865e7ae7bSOr Gerlitz 22965e7ae7bSOr Gerlitz /* Send the cmd PDU */ 2302261ec3dSMike Christie if (!iser_task->command_sent) { 2312261ec3dSMike Christie error = iser_send_command(conn, task); 23265e7ae7bSOr Gerlitz if (error) 2332747fdb2SMike Christie goto iscsi_iser_task_xmit_exit; 2342261ec3dSMike Christie iser_task->command_sent = 1; 23565e7ae7bSOr Gerlitz } 23665e7ae7bSOr Gerlitz 23765e7ae7bSOr Gerlitz /* Send unsolicited data-out PDU(s) if necessary */ 2382261ec3dSMike Christie if (task->unsol_count) 2392261ec3dSMike Christie error = iscsi_iser_task_xmit_unsol_data(conn, task); 24065e7ae7bSOr Gerlitz 2412747fdb2SMike Christie iscsi_iser_task_xmit_exit: 242f0938401SErez Zilber if (error && error != -ENOBUFS) 24365e7ae7bSOr Gerlitz iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); 24465e7ae7bSOr Gerlitz return error; 24565e7ae7bSOr Gerlitz } 24665e7ae7bSOr Gerlitz 24765e7ae7bSOr Gerlitz static void 2482261ec3dSMike Christie iscsi_iser_cleanup_task(struct iscsi_conn *conn, struct iscsi_task *task) 24965e7ae7bSOr Gerlitz { 2502261ec3dSMike Christie struct iscsi_iser_task *iser_task = task->dd_data; 25165e7ae7bSOr Gerlitz 2522747fdb2SMike Christie /* mgmt tasks do not need special cleanup */ 2532261ec3dSMike Christie if (!task->sc) 2542747fdb2SMike Christie return; 25565e7ae7bSOr Gerlitz 2562261ec3dSMike Christie if (iser_task->status == ISER_TASK_STATUS_STARTED) { 2572261ec3dSMike Christie iser_task->status = ISER_TASK_STATUS_COMPLETED; 2582261ec3dSMike Christie iser_task_rdma_finalize(iser_task); 25965e7ae7bSOr Gerlitz } 26065e7ae7bSOr Gerlitz } 26165e7ae7bSOr Gerlitz 26265e7ae7bSOr Gerlitz static struct iscsi_cls_conn * 26365e7ae7bSOr Gerlitz iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) 26465e7ae7bSOr Gerlitz { 26565e7ae7bSOr Gerlitz struct iscsi_conn *conn; 26665e7ae7bSOr Gerlitz struct iscsi_cls_conn *cls_conn; 26765e7ae7bSOr Gerlitz struct iscsi_iser_conn *iser_conn; 26865e7ae7bSOr Gerlitz 2695d91e209SMike Christie cls_conn = iscsi_conn_setup(cls_session, sizeof(*iser_conn), conn_idx); 27065e7ae7bSOr Gerlitz if (!cls_conn) 27165e7ae7bSOr Gerlitz return NULL; 27265e7ae7bSOr Gerlitz conn = cls_conn->dd_data; 27365e7ae7bSOr Gerlitz 27465e7ae7bSOr Gerlitz /* 27565e7ae7bSOr Gerlitz * due to issues with the login code re iser sematics 27665e7ae7bSOr Gerlitz * this not set in iscsi_conn_setup - FIXME 27765e7ae7bSOr Gerlitz */ 27865e7ae7bSOr Gerlitz conn->max_recv_dlength = 128; 27965e7ae7bSOr Gerlitz 2805d91e209SMike Christie iser_conn = conn->dd_data; 28165e7ae7bSOr Gerlitz conn->dd_data = iser_conn; 28265e7ae7bSOr Gerlitz iser_conn->iscsi_conn = conn; 28365e7ae7bSOr Gerlitz 28465e7ae7bSOr Gerlitz return cls_conn; 28565e7ae7bSOr Gerlitz } 28665e7ae7bSOr Gerlitz 28765e7ae7bSOr Gerlitz static void 28865e7ae7bSOr Gerlitz iscsi_iser_conn_destroy(struct iscsi_cls_conn *cls_conn) 28965e7ae7bSOr Gerlitz { 29065e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 29165e7ae7bSOr Gerlitz struct iscsi_iser_conn *iser_conn = conn->dd_data; 292b40977d9SMike Christie struct iser_conn *ib_conn = iser_conn->ib_conn; 29365e7ae7bSOr Gerlitz 29465e7ae7bSOr Gerlitz iscsi_conn_teardown(cls_conn); 295b40977d9SMike Christie /* 296b40977d9SMike Christie * Userspace will normally call the stop callback and 297b40977d9SMike Christie * already have freed the ib_conn, but if it goofed up then 298b40977d9SMike Christie * we free it here. 299b40977d9SMike Christie */ 300b40977d9SMike Christie if (ib_conn) { 301b40977d9SMike Christie ib_conn->iser_conn = NULL; 302b40977d9SMike Christie iser_conn_put(ib_conn); 303b40977d9SMike Christie } 30465e7ae7bSOr Gerlitz } 30565e7ae7bSOr Gerlitz 30665e7ae7bSOr Gerlitz static int 30765e7ae7bSOr Gerlitz iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session, 30865e7ae7bSOr Gerlitz struct iscsi_cls_conn *cls_conn, uint64_t transport_eph, 30965e7ae7bSOr Gerlitz int is_leading) 31065e7ae7bSOr Gerlitz { 31165e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 31265e7ae7bSOr Gerlitz struct iscsi_iser_conn *iser_conn; 31365e7ae7bSOr Gerlitz struct iser_conn *ib_conn; 314412eeafaSMike Christie struct iscsi_endpoint *ep; 31565e7ae7bSOr Gerlitz int error; 31665e7ae7bSOr Gerlitz 31765e7ae7bSOr Gerlitz error = iscsi_conn_bind(cls_session, cls_conn, is_leading); 31865e7ae7bSOr Gerlitz if (error) 31965e7ae7bSOr Gerlitz return error; 32065e7ae7bSOr Gerlitz 32165e7ae7bSOr Gerlitz /* the transport ep handle comes from user space so it must be 32265e7ae7bSOr Gerlitz * verified against the global ib connections list */ 323412eeafaSMike Christie ep = iscsi_lookup_endpoint(transport_eph); 324412eeafaSMike Christie if (!ep) { 32565e7ae7bSOr Gerlitz iser_err("can't bind eph %llx\n", 32665e7ae7bSOr Gerlitz (unsigned long long)transport_eph); 32765e7ae7bSOr Gerlitz return -EINVAL; 32865e7ae7bSOr Gerlitz } 329412eeafaSMike Christie ib_conn = ep->dd_data; 330412eeafaSMike Christie 33165e7ae7bSOr Gerlitz /* binds the iSER connection retrieved from the previously 33265e7ae7bSOr Gerlitz * connected ep_handle to the iSCSI layer connection. exchanges 33365e7ae7bSOr Gerlitz * connection pointers */ 33465e7ae7bSOr Gerlitz iser_err("binding iscsi conn %p to iser_conn %p\n",conn,ib_conn); 33565e7ae7bSOr Gerlitz iser_conn = conn->dd_data; 33665e7ae7bSOr Gerlitz ib_conn->iser_conn = iser_conn; 33765e7ae7bSOr Gerlitz iser_conn->ib_conn = ib_conn; 338b40977d9SMike Christie iser_conn_get(ib_conn); 33965e7ae7bSOr Gerlitz return 0; 34065e7ae7bSOr Gerlitz } 34165e7ae7bSOr Gerlitz 342b40977d9SMike Christie static void 343b40977d9SMike Christie iscsi_iser_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) 344b40977d9SMike Christie { 345b40977d9SMike Christie struct iscsi_conn *conn = cls_conn->dd_data; 346b40977d9SMike Christie struct iscsi_iser_conn *iser_conn = conn->dd_data; 347b40977d9SMike Christie struct iser_conn *ib_conn = iser_conn->ib_conn; 348b40977d9SMike Christie 349913e5bf4SMike Christie /* 350913e5bf4SMike Christie * Userspace may have goofed up and not bound the connection or 351913e5bf4SMike Christie * might have only partially setup the connection. 352913e5bf4SMike Christie */ 353913e5bf4SMike Christie if (ib_conn) { 354b40977d9SMike Christie iscsi_conn_stop(cls_conn, flag); 355b40977d9SMike Christie /* 356b40977d9SMike Christie * There is no unbind event so the stop callback 357b40977d9SMike Christie * must release the ref from the bind. 358b40977d9SMike Christie */ 359b40977d9SMike Christie iser_conn_put(ib_conn); 360913e5bf4SMike Christie } 361b40977d9SMike Christie iser_conn->ib_conn = NULL; 362b40977d9SMike Christie } 363b40977d9SMike Christie 36465e7ae7bSOr Gerlitz static int 36565e7ae7bSOr Gerlitz iscsi_iser_conn_start(struct iscsi_cls_conn *cls_conn) 36665e7ae7bSOr Gerlitz { 36765e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 36865e7ae7bSOr Gerlitz int err; 36965e7ae7bSOr Gerlitz 3702e7a7426SErez Zilber err = iser_conn_set_full_featured_mode(conn); 37165e7ae7bSOr Gerlitz if (err) 37265e7ae7bSOr Gerlitz return err; 37365e7ae7bSOr Gerlitz 3742e7a7426SErez Zilber return iscsi_conn_start(cls_conn); 37565e7ae7bSOr Gerlitz } 37665e7ae7bSOr Gerlitz 37775613521SMike Christie static void iscsi_iser_session_destroy(struct iscsi_cls_session *cls_session) 37875613521SMike Christie { 37975613521SMike Christie struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); 38075613521SMike Christie 381e5bd7b54SMike Christie iscsi_session_teardown(cls_session); 382a4804cd6SMike Christie iscsi_host_remove(shost); 383a4804cd6SMike Christie iscsi_host_free(shost); 38475613521SMike Christie } 38565e7ae7bSOr Gerlitz 38665e7ae7bSOr Gerlitz static struct iscsi_cls_session * 387412eeafaSMike Christie iscsi_iser_session_create(struct iscsi_endpoint *ep, 3881548271eSMike Christie uint16_t cmds_max, uint16_t qdepth, 38965e7ae7bSOr Gerlitz uint32_t initial_cmdsn, uint32_t *hostno) 39065e7ae7bSOr Gerlitz { 39165e7ae7bSOr Gerlitz struct iscsi_cls_session *cls_session; 39265e7ae7bSOr Gerlitz struct iscsi_session *session; 393412eeafaSMike Christie struct Scsi_Host *shost; 39465e7ae7bSOr Gerlitz int i; 3952261ec3dSMike Christie struct iscsi_task *task; 3962261ec3dSMike Christie struct iscsi_iser_task *iser_task; 397412eeafaSMike Christie struct iser_conn *ib_conn; 39875613521SMike Christie 399a4804cd6SMike Christie shost = iscsi_host_alloc(&iscsi_iser_sht, 0, ISCSI_MAX_CMD_PER_LUN); 40075613521SMike Christie if (!shost) 40175613521SMike Christie return NULL; 40275613521SMike Christie shost->transportt = iscsi_iser_scsi_transport; 40375613521SMike Christie shost->max_lun = iscsi_max_lun; 40475613521SMike Christie shost->max_id = 0; 40575613521SMike Christie shost->max_channel = 0; 40675613521SMike Christie shost->max_cmd_len = 16; 40775613521SMike Christie 408412eeafaSMike Christie /* 409412eeafaSMike Christie * older userspace tools (before 2.0-870) did not pass us 410412eeafaSMike Christie * the leading conn's ep so this will be NULL; 411412eeafaSMike Christie */ 412412eeafaSMike Christie if (ep) 413412eeafaSMike Christie ib_conn = ep->dd_data; 414412eeafaSMike Christie 415412eeafaSMike Christie if (iscsi_host_add(shost, 416412eeafaSMike Christie ep ? ib_conn->device->ib_device->dma_device : NULL)) 41775613521SMike Christie goto free_host; 41875613521SMike Christie *hostno = shost->host_no; 41965e7ae7bSOr Gerlitz 4201548271eSMike Christie /* 4211548271eSMike Christie * we do not support setting can_queue cmd_per_lun from userspace yet 4221548271eSMike Christie * because we preallocate so many resources 4231548271eSMike Christie */ 42475613521SMike Christie cls_session = iscsi_session_setup(&iscsi_iser_transport, shost, 4251548271eSMike Christie ISCSI_DEF_XMIT_CMDS_MAX, 4262261ec3dSMike Christie sizeof(struct iscsi_iser_task), 4277970634bSMike Christie initial_cmdsn, 0); 42865e7ae7bSOr Gerlitz if (!cls_session) 42975613521SMike Christie goto remove_host; 43075613521SMike Christie session = cls_session->dd_data; 43165e7ae7bSOr Gerlitz 4322747fdb2SMike Christie shost->can_queue = session->scsi_cmds_max; 43365e7ae7bSOr Gerlitz /* libiscsi setup itts, data and pool so just set desc fields */ 43465e7ae7bSOr Gerlitz for (i = 0; i < session->cmds_max; i++) { 4352261ec3dSMike Christie task = session->cmds[i]; 4362261ec3dSMike Christie iser_task = task->dd_data; 4372261ec3dSMike Christie task->hdr = (struct iscsi_cmd *)&iser_task->desc.iscsi_header; 4382261ec3dSMike Christie task->hdr_max = sizeof(iser_task->desc.iscsi_header); 43965e7ae7bSOr Gerlitz } 44065e7ae7bSOr Gerlitz return cls_session; 44175613521SMike Christie 44275613521SMike Christie remove_host: 443a4804cd6SMike Christie iscsi_host_remove(shost); 44475613521SMike Christie free_host: 445a4804cd6SMike Christie iscsi_host_free(shost); 44675613521SMike Christie return NULL; 44765e7ae7bSOr Gerlitz } 44865e7ae7bSOr Gerlitz 44965e7ae7bSOr Gerlitz static int 450358ff019SMike Christie iscsi_iser_set_param(struct iscsi_cls_conn *cls_conn, 451358ff019SMike Christie enum iscsi_param param, char *buf, int buflen) 45265e7ae7bSOr Gerlitz { 453358ff019SMike Christie int value; 45465e7ae7bSOr Gerlitz 45565e7ae7bSOr Gerlitz switch (param) { 45665e7ae7bSOr Gerlitz case ISCSI_PARAM_MAX_RECV_DLENGTH: 45765e7ae7bSOr Gerlitz /* TBD */ 45865e7ae7bSOr Gerlitz break; 45965e7ae7bSOr Gerlitz case ISCSI_PARAM_HDRDGST_EN: 460358ff019SMike Christie sscanf(buf, "%d", &value); 46165e7ae7bSOr Gerlitz if (value) { 46265e7ae7bSOr Gerlitz printk(KERN_ERR "DataDigest wasn't negotiated to None"); 46365e7ae7bSOr Gerlitz return -EPROTO; 46465e7ae7bSOr Gerlitz } 46565e7ae7bSOr Gerlitz break; 46665e7ae7bSOr Gerlitz case ISCSI_PARAM_DATADGST_EN: 467358ff019SMike Christie sscanf(buf, "%d", &value); 46865e7ae7bSOr Gerlitz if (value) { 46965e7ae7bSOr Gerlitz printk(KERN_ERR "DataDigest wasn't negotiated to None"); 47065e7ae7bSOr Gerlitz return -EPROTO; 47165e7ae7bSOr Gerlitz } 47265e7ae7bSOr Gerlitz break; 47365e7ae7bSOr Gerlitz case ISCSI_PARAM_IFMARKER_EN: 474358ff019SMike Christie sscanf(buf, "%d", &value); 47565e7ae7bSOr Gerlitz if (value) { 47665e7ae7bSOr Gerlitz printk(KERN_ERR "IFMarker wasn't negotiated to No"); 47765e7ae7bSOr Gerlitz return -EPROTO; 47865e7ae7bSOr Gerlitz } 47965e7ae7bSOr Gerlitz break; 48065e7ae7bSOr Gerlitz case ISCSI_PARAM_OFMARKER_EN: 481358ff019SMike Christie sscanf(buf, "%d", &value); 48265e7ae7bSOr Gerlitz if (value) { 48365e7ae7bSOr Gerlitz printk(KERN_ERR "OFMarker wasn't negotiated to No"); 48465e7ae7bSOr Gerlitz return -EPROTO; 48565e7ae7bSOr Gerlitz } 48665e7ae7bSOr Gerlitz break; 48765e7ae7bSOr Gerlitz default: 488358ff019SMike Christie return iscsi_set_param(cls_conn, param, buf, buflen); 48965e7ae7bSOr Gerlitz } 49065e7ae7bSOr Gerlitz 49165e7ae7bSOr Gerlitz return 0; 49265e7ae7bSOr Gerlitz } 49365e7ae7bSOr Gerlitz 49465e7ae7bSOr Gerlitz static void 49565e7ae7bSOr Gerlitz iscsi_iser_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats) 49665e7ae7bSOr Gerlitz { 49765e7ae7bSOr Gerlitz struct iscsi_conn *conn = cls_conn->dd_data; 49865e7ae7bSOr Gerlitz 49965e7ae7bSOr Gerlitz stats->txdata_octets = conn->txdata_octets; 50065e7ae7bSOr Gerlitz stats->rxdata_octets = conn->rxdata_octets; 50165e7ae7bSOr Gerlitz stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; 50265e7ae7bSOr Gerlitz stats->dataout_pdus = conn->dataout_pdus_cnt; 50365e7ae7bSOr Gerlitz stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; 50465e7ae7bSOr Gerlitz stats->datain_pdus = conn->datain_pdus_cnt; /* always 0 */ 50565e7ae7bSOr Gerlitz stats->r2t_pdus = conn->r2t_pdus_cnt; /* always 0 */ 50665e7ae7bSOr Gerlitz stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; 50765e7ae7bSOr Gerlitz stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; 50887528227SEli Dorfman stats->custom_length = 4; 50965e7ae7bSOr Gerlitz strcpy(stats->custom[0].desc, "qp_tx_queue_full"); 51065e7ae7bSOr Gerlitz stats->custom[0].value = 0; /* TB iser_conn->qp_tx_queue_full; */ 51165e7ae7bSOr Gerlitz strcpy(stats->custom[1].desc, "fmr_map_not_avail"); 51265e7ae7bSOr Gerlitz stats->custom[1].value = 0; /* TB iser_conn->fmr_map_not_avail */; 51365e7ae7bSOr Gerlitz strcpy(stats->custom[2].desc, "eh_abort_cnt"); 51465e7ae7bSOr Gerlitz stats->custom[2].value = conn->eh_abort_cnt; 51587528227SEli Dorfman strcpy(stats->custom[3].desc, "fmr_unalign_cnt"); 51687528227SEli Dorfman stats->custom[3].value = conn->fmr_unalign_cnt; 51765e7ae7bSOr Gerlitz } 51865e7ae7bSOr Gerlitz 519412eeafaSMike Christie static struct iscsi_endpoint * 520412eeafaSMike Christie iscsi_iser_ep_connect(struct sockaddr *dst_addr, int non_blocking) 52165e7ae7bSOr Gerlitz { 52265e7ae7bSOr Gerlitz int err; 52365e7ae7bSOr Gerlitz struct iser_conn *ib_conn; 524412eeafaSMike Christie struct iscsi_endpoint *ep; 52565e7ae7bSOr Gerlitz 526412eeafaSMike Christie ep = iscsi_create_endpoint(sizeof(*ib_conn)); 527412eeafaSMike Christie if (!ep) 528412eeafaSMike Christie return ERR_PTR(-ENOMEM); 52965e7ae7bSOr Gerlitz 530412eeafaSMike Christie ib_conn = ep->dd_data; 531412eeafaSMike Christie ib_conn->ep = ep; 532412eeafaSMike Christie iser_conn_init(ib_conn); 53365e7ae7bSOr Gerlitz 534412eeafaSMike Christie err = iser_connect(ib_conn, NULL, (struct sockaddr_in *)dst_addr, 535412eeafaSMike Christie non_blocking); 536412eeafaSMike Christie if (err) { 537412eeafaSMike Christie iscsi_destroy_endpoint(ep); 538412eeafaSMike Christie return ERR_PTR(err); 539412eeafaSMike Christie } 540412eeafaSMike Christie return ep; 54165e7ae7bSOr Gerlitz } 54265e7ae7bSOr Gerlitz 54365e7ae7bSOr Gerlitz static int 544412eeafaSMike Christie iscsi_iser_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) 54565e7ae7bSOr Gerlitz { 546412eeafaSMike Christie struct iser_conn *ib_conn; 54765e7ae7bSOr Gerlitz int rc; 54865e7ae7bSOr Gerlitz 549412eeafaSMike Christie ib_conn = ep->dd_data; 55065e7ae7bSOr Gerlitz rc = wait_event_interruptible_timeout(ib_conn->wait, 55165e7ae7bSOr Gerlitz ib_conn->state == ISER_CONN_UP, 55265e7ae7bSOr Gerlitz msecs_to_jiffies(timeout_ms)); 55365e7ae7bSOr Gerlitz 55465e7ae7bSOr Gerlitz /* if conn establishment failed, return error code to iscsi */ 55565e7ae7bSOr Gerlitz if (!rc && 55665e7ae7bSOr Gerlitz (ib_conn->state == ISER_CONN_TERMINATING || 55765e7ae7bSOr Gerlitz ib_conn->state == ISER_CONN_DOWN)) 55865e7ae7bSOr Gerlitz rc = -1; 55965e7ae7bSOr Gerlitz 56065e7ae7bSOr Gerlitz iser_err("ib conn %p rc = %d\n", ib_conn, rc); 56165e7ae7bSOr Gerlitz 56265e7ae7bSOr Gerlitz if (rc > 0) 56365e7ae7bSOr Gerlitz return 1; /* success, this is the equivalent of POLLOUT */ 56465e7ae7bSOr Gerlitz else if (!rc) 56565e7ae7bSOr Gerlitz return 0; /* timeout */ 56665e7ae7bSOr Gerlitz else 56765e7ae7bSOr Gerlitz return rc; /* signal */ 56865e7ae7bSOr Gerlitz } 56965e7ae7bSOr Gerlitz 57065e7ae7bSOr Gerlitz static void 571412eeafaSMike Christie iscsi_iser_ep_disconnect(struct iscsi_endpoint *ep) 57265e7ae7bSOr Gerlitz { 5731c83469dSMike Christie struct iser_conn *ib_conn; 57465e7ae7bSOr Gerlitz 575412eeafaSMike Christie ib_conn = ep->dd_data; 576b40977d9SMike Christie if (ib_conn->iser_conn) 577b40977d9SMike Christie /* 578b40977d9SMike Christie * Must suspend xmit path if the ep is bound to the 579b40977d9SMike Christie * iscsi_conn, so we know we are not accessing the ib_conn 580b40977d9SMike Christie * when we free it. 581b40977d9SMike Christie * 582b40977d9SMike Christie * This may not be bound if the ep poll failed. 583b40977d9SMike Christie */ 584b40977d9SMike Christie iscsi_suspend_tx(ib_conn->iser_conn->iscsi_conn); 585b40977d9SMike Christie 58665e7ae7bSOr Gerlitz 58765e7ae7bSOr Gerlitz iser_err("ib conn %p state %d\n",ib_conn, ib_conn->state); 58865e7ae7bSOr Gerlitz iser_conn_terminate(ib_conn); 58965e7ae7bSOr Gerlitz } 59065e7ae7bSOr Gerlitz 59165e7ae7bSOr Gerlitz static struct scsi_host_template iscsi_iser_sht = { 5927974392cSMike Christie .module = THIS_MODULE, 59365e7ae7bSOr Gerlitz .name = "iSCSI Initiator over iSER, v." DRV_VER, 59465e7ae7bSOr Gerlitz .queuecommand = iscsi_queuecommand, 5956410627eSErez Zilber .change_queue_depth = iscsi_change_queue_depth, 59665e7ae7bSOr Gerlitz .sg_tablesize = ISCSI_ISER_SG_TABLESIZE, 5978072ec2fSErez Zilber .max_sectors = 1024, 59865e7ae7bSOr Gerlitz .cmd_per_lun = ISCSI_MAX_CMD_PER_LUN, 59965e7ae7bSOr Gerlitz .eh_abort_handler = iscsi_eh_abort, 60090c18f3cSErez Zilber .eh_device_reset_handler= iscsi_eh_device_reset, 6018e124525SMike Christie .eh_target_reset_handler= iscsi_eh_target_reset, 60265e7ae7bSOr Gerlitz .use_clustering = DISABLE_CLUSTERING, 60365e7ae7bSOr Gerlitz .proc_name = "iscsi_iser", 60465e7ae7bSOr Gerlitz .this_id = -1, 60565e7ae7bSOr Gerlitz }; 60665e7ae7bSOr Gerlitz 60765e7ae7bSOr Gerlitz static struct iscsi_transport iscsi_iser_transport = { 60865e7ae7bSOr Gerlitz .owner = THIS_MODULE, 60965e7ae7bSOr Gerlitz .name = "iser", 61065e7ae7bSOr Gerlitz .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T, 61165e7ae7bSOr Gerlitz .param_mask = ISCSI_MAX_RECV_DLENGTH | 61265e7ae7bSOr Gerlitz ISCSI_MAX_XMIT_DLENGTH | 61365e7ae7bSOr Gerlitz ISCSI_HDRDGST_EN | 61465e7ae7bSOr Gerlitz ISCSI_DATADGST_EN | 61565e7ae7bSOr Gerlitz ISCSI_INITIAL_R2T_EN | 61665e7ae7bSOr Gerlitz ISCSI_MAX_R2T | 61765e7ae7bSOr Gerlitz ISCSI_IMM_DATA_EN | 61865e7ae7bSOr Gerlitz ISCSI_FIRST_BURST | 61965e7ae7bSOr Gerlitz ISCSI_MAX_BURST | 62065e7ae7bSOr Gerlitz ISCSI_PDU_INORDER_EN | 621358ff019SMike Christie ISCSI_DATASEQ_INORDER_EN | 622358ff019SMike Christie ISCSI_EXP_STATSN | 623358ff019SMike Christie ISCSI_PERSISTENT_PORT | 624358ff019SMike Christie ISCSI_PERSISTENT_ADDRESS | 625b2c64167SMike Christie ISCSI_TARGET_NAME | ISCSI_TPGT | 626b2c64167SMike Christie ISCSI_USERNAME | ISCSI_PASSWORD | 627f6d5180cSMike Christie ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | 628f6d5180cSMike Christie ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | 62988dfd340SMike Christie ISCSI_PING_TMO | ISCSI_RECV_TMO | 63088dfd340SMike Christie ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, 6318ad5781aSMike Christie .host_param_mask = ISCSI_HOST_HWADDRESS | 632d8196ed2SMike Christie ISCSI_HOST_NETDEV_NAME | 6338ad5781aSMike Christie ISCSI_HOST_INITIATOR_NAME, 63465e7ae7bSOr Gerlitz /* session management */ 63565e7ae7bSOr Gerlitz .create_session = iscsi_iser_session_create, 63675613521SMike Christie .destroy_session = iscsi_iser_session_destroy, 63765e7ae7bSOr Gerlitz /* connection management */ 63865e7ae7bSOr Gerlitz .create_conn = iscsi_iser_conn_create, 63965e7ae7bSOr Gerlitz .bind_conn = iscsi_iser_conn_bind, 64065e7ae7bSOr Gerlitz .destroy_conn = iscsi_iser_conn_destroy, 641358ff019SMike Christie .set_param = iscsi_iser_set_param, 642358ff019SMike Christie .get_conn_param = iscsi_conn_get_param, 643358ff019SMike Christie .get_session_param = iscsi_session_get_param, 64465e7ae7bSOr Gerlitz .start_conn = iscsi_iser_conn_start, 645b40977d9SMike Christie .stop_conn = iscsi_iser_conn_stop, 6460801c242SMike Christie /* iscsi host params */ 6470801c242SMike Christie .get_host_param = iscsi_host_get_param, 6480801c242SMike Christie .set_host_param = iscsi_host_set_param, 64965e7ae7bSOr Gerlitz /* IO */ 65065e7ae7bSOr Gerlitz .send_pdu = iscsi_conn_send_pdu, 65165e7ae7bSOr Gerlitz .get_stats = iscsi_iser_conn_get_stats, 6522747fdb2SMike Christie .init_task = iscsi_iser_task_init, 6532747fdb2SMike Christie .xmit_task = iscsi_iser_task_xmit, 6542747fdb2SMike Christie .cleanup_task = iscsi_iser_cleanup_task, 65565e7ae7bSOr Gerlitz /* recovery */ 65665e7ae7bSOr Gerlitz .session_recovery_timedout = iscsi_session_recovery_timedout, 65765e7ae7bSOr Gerlitz 65865e7ae7bSOr Gerlitz .ep_connect = iscsi_iser_ep_connect, 65965e7ae7bSOr Gerlitz .ep_poll = iscsi_iser_ep_poll, 66065e7ae7bSOr Gerlitz .ep_disconnect = iscsi_iser_ep_disconnect 66165e7ae7bSOr Gerlitz }; 66265e7ae7bSOr Gerlitz 66365e7ae7bSOr Gerlitz static int __init iser_init(void) 66465e7ae7bSOr Gerlitz { 66565e7ae7bSOr Gerlitz int err; 66665e7ae7bSOr Gerlitz 66765e7ae7bSOr Gerlitz iser_dbg("Starting iSER datamover...\n"); 66865e7ae7bSOr Gerlitz 66965e7ae7bSOr Gerlitz if (iscsi_max_lun < 1) { 67065e7ae7bSOr Gerlitz printk(KERN_ERR "Invalid max_lun value of %u\n", iscsi_max_lun); 67165e7ae7bSOr Gerlitz return -EINVAL; 67265e7ae7bSOr Gerlitz } 67365e7ae7bSOr Gerlitz 67465e7ae7bSOr Gerlitz memset(&ig, 0, sizeof(struct iser_global)); 67565e7ae7bSOr Gerlitz 67665e7ae7bSOr Gerlitz ig.desc_cache = kmem_cache_create("iser_descriptors", 67765e7ae7bSOr Gerlitz sizeof (struct iser_desc), 67865e7ae7bSOr Gerlitz 0, SLAB_HWCACHE_ALIGN, 67920c2df83SPaul Mundt NULL); 68065e7ae7bSOr Gerlitz if (ig.desc_cache == NULL) 68165e7ae7bSOr Gerlitz return -ENOMEM; 68265e7ae7bSOr Gerlitz 68365e7ae7bSOr Gerlitz /* device init is called only after the first addr resolution */ 68465e7ae7bSOr Gerlitz mutex_init(&ig.device_list_mutex); 68565e7ae7bSOr Gerlitz INIT_LIST_HEAD(&ig.device_list); 68665e7ae7bSOr Gerlitz mutex_init(&ig.connlist_mutex); 68765e7ae7bSOr Gerlitz INIT_LIST_HEAD(&ig.connlist); 68865e7ae7bSOr Gerlitz 68975613521SMike Christie iscsi_iser_scsi_transport = iscsi_register_transport( 69075613521SMike Christie &iscsi_iser_transport); 69175613521SMike Christie if (!iscsi_iser_scsi_transport) { 69265e7ae7bSOr Gerlitz iser_err("iscsi_register_transport failed\n"); 69365e7ae7bSOr Gerlitz err = -EINVAL; 69465e7ae7bSOr Gerlitz goto register_transport_failure; 69565e7ae7bSOr Gerlitz } 69665e7ae7bSOr Gerlitz 69765e7ae7bSOr Gerlitz return 0; 69865e7ae7bSOr Gerlitz 69965e7ae7bSOr Gerlitz register_transport_failure: 70065e7ae7bSOr Gerlitz kmem_cache_destroy(ig.desc_cache); 70165e7ae7bSOr Gerlitz 70265e7ae7bSOr Gerlitz return err; 70365e7ae7bSOr Gerlitz } 70465e7ae7bSOr Gerlitz 70565e7ae7bSOr Gerlitz static void __exit iser_exit(void) 70665e7ae7bSOr Gerlitz { 70765e7ae7bSOr Gerlitz iser_dbg("Removing iSER datamover...\n"); 70865e7ae7bSOr Gerlitz iscsi_unregister_transport(&iscsi_iser_transport); 70965e7ae7bSOr Gerlitz kmem_cache_destroy(ig.desc_cache); 71065e7ae7bSOr Gerlitz } 71165e7ae7bSOr Gerlitz 71265e7ae7bSOr Gerlitz module_init(iser_init); 71365e7ae7bSOr Gerlitz module_exit(iser_exit); 714