diff options
Diffstat (limited to 'drivers/target/iscsi/iscsi_target.c')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 2243 |
1 files changed, 1276 insertions, 967 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 339f97f7085..1f4c794f5fc 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1,9 +1,7 @@ /******************************************************************************* * This file contains main functions related to the iSCSI Target Core Driver. * - * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. - * - * Licensed to the Linux Foundation under the General Public License (GPL) version 2. + * (c) Copyright 2007-2013 Datera, Inc. * * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> * @@ -49,10 +47,12 @@ #include "iscsi_target_device.h" #include "iscsi_target_stat.h" +#include <target/iscsi/iscsi_transport.h> + static LIST_HEAD(g_tiqn_list); static LIST_HEAD(g_np_list); static DEFINE_SPINLOCK(tiqn_lock); -static DEFINE_SPINLOCK(np_lock); +static DEFINE_MUTEX(np_lock); static struct idr tiqn_idr; struct idr sess_idr; @@ -61,15 +61,13 @@ spinlock_t sess_idr_lock; struct iscsit_global *iscsit_global; -struct kmem_cache *lio_cmd_cache; struct kmem_cache *lio_qr_cache; struct kmem_cache *lio_dr_cache; 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) { @@ -144,23 +142,24 @@ struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf) spin_lock_init(&tiqn->login_stats.lock); spin_lock_init(&tiqn->logout_stats.lock); - if (!idr_pre_get(&tiqn_idr, GFP_KERNEL)) { - pr_err("idr_pre_get() for tiqn_idr failed\n"); - kfree(tiqn); - return ERR_PTR(-ENOMEM); - } tiqn->tiqn_state = TIQN_STATE_ACTIVE; + idr_preload(GFP_KERNEL); spin_lock(&tiqn_lock); - ret = idr_get_new(&tiqn_idr, NULL, &tiqn->tiqn_index); + + ret = idr_alloc(&tiqn_idr, NULL, 0, 0, GFP_NOWAIT); if (ret < 0) { - pr_err("idr_get_new() failed for tiqn->tiqn_index\n"); + pr_err("idr_alloc() failed for tiqn->tiqn_index\n"); spin_unlock(&tiqn_lock); + idr_preload_end(); kfree(tiqn); return ERR_PTR(ret); } + tiqn->tiqn_index = ret; list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); + spin_unlock(&tiqn_lock); + idr_preload_end(); pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); @@ -218,11 +217,6 @@ int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) spin_unlock_bh(&np->np_thread_lock); return -1; } - if (np->np_login_tpg) { - pr_err("np->np_login_tpg() is not NULL!\n"); - spin_unlock_bh(&np->np_thread_lock); - return -1; - } spin_unlock_bh(&np->np_thread_lock); /* * Determine if the portal group is accepting storage traffic. @@ -237,26 +231,38 @@ int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) /* * Here we serialize access across the TIQN+TPG Tuple. */ - ret = mutex_lock_interruptible(&tpg->np_login_lock); + ret = down_interruptible(&tpg->np_login_sem); if ((ret != 0) || signal_pending(current)) return -1; - spin_lock_bh(&np->np_thread_lock); - np->np_login_tpg = tpg; - spin_unlock_bh(&np->np_thread_lock); + spin_lock_bh(&tpg->tpg_state_lock); + if (tpg->tpg_state != TPG_STATE_ACTIVE) { + spin_unlock_bh(&tpg->tpg_state_lock); + up(&tpg->np_login_sem); + return -1; + } + spin_unlock_bh(&tpg->tpg_state_lock); return 0; } -int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) +void iscsit_login_kref_put(struct kref *kref) +{ + struct iscsi_tpg_np *tpg_np = container_of(kref, + struct iscsi_tpg_np, tpg_np_kref); + + complete(&tpg_np->tpg_np_comp); +} + +int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg, + struct iscsi_tpg_np *tpg_np) { struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; - spin_lock_bh(&np->np_thread_lock); - np->np_login_tpg = NULL; - spin_unlock_bh(&np->np_thread_lock); + up(&tpg->np_login_sem); - mutex_unlock(&tpg->np_login_lock); + if (tpg_np) + kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); if (tiqn) iscsit_put_tiqn_for_login(tiqn); @@ -264,60 +270,73 @@ int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) return 0; } -static struct iscsi_np *iscsit_get_np( +bool iscsit_check_np_match( struct __kernel_sockaddr_storage *sockaddr, + struct iscsi_np *np, int network_transport) { struct sockaddr_in *sock_in, *sock_in_e; struct sockaddr_in6 *sock_in6, *sock_in6_e; - struct iscsi_np *np; - int ip_match = 0; + bool ip_match = false; u16 port; - spin_lock_bh(&np_lock); - list_for_each_entry(np, &g_np_list, np_list) { - spin_lock(&np->np_thread_lock); - if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { - spin_unlock(&np->np_thread_lock); - continue; - } + if (sockaddr->ss_family == AF_INET6) { + sock_in6 = (struct sockaddr_in6 *)sockaddr; + sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; + + if (!memcmp(&sock_in6->sin6_addr.in6_u, + &sock_in6_e->sin6_addr.in6_u, + sizeof(struct in6_addr))) + ip_match = true; + + port = ntohs(sock_in6->sin6_port); + } else { + sock_in = (struct sockaddr_in *)sockaddr; + sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; - if (sockaddr->ss_family == AF_INET6) { - sock_in6 = (struct sockaddr_in6 *)sockaddr; - sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; + if (sock_in->sin_addr.s_addr == sock_in_e->sin_addr.s_addr) + ip_match = true; - if (!memcmp(&sock_in6->sin6_addr.in6_u, - &sock_in6_e->sin6_addr.in6_u, - sizeof(struct in6_addr))) - ip_match = 1; + port = ntohs(sock_in->sin_port); + } - port = ntohs(sock_in6->sin6_port); - } else { - sock_in = (struct sockaddr_in *)sockaddr; - sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; + if (ip_match && (np->np_port == port) && + (np->np_network_transport == network_transport)) + return true; - if (sock_in->sin_addr.s_addr == - sock_in_e->sin_addr.s_addr) - ip_match = 1; + return false; +} - port = ntohs(sock_in->sin_port); +/* + * Called with mutex np_lock held + */ +static struct iscsi_np *iscsit_get_np( + struct __kernel_sockaddr_storage *sockaddr, + int network_transport) +{ + struct iscsi_np *np; + bool match; + + list_for_each_entry(np, &g_np_list, np_list) { + spin_lock_bh(&np->np_thread_lock); + if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { + spin_unlock_bh(&np->np_thread_lock); + continue; } - if ((ip_match == 1) && (np->np_port == port) && - (np->np_network_transport == network_transport)) { + match = iscsit_check_np_match(sockaddr, np, network_transport); + if (match) { /* * Increment the np_exports reference count now to * prevent iscsit_del_np() below from being called * while iscsi_tpg_add_network_portal() is called. */ np->np_exports++; - spin_unlock(&np->np_thread_lock); - spin_unlock_bh(&np_lock); + spin_unlock_bh(&np->np_thread_lock); return np; } - spin_unlock(&np->np_thread_lock); + spin_unlock_bh(&np->np_thread_lock); } - spin_unlock_bh(&np_lock); return NULL; } @@ -331,16 +350,22 @@ struct iscsi_np *iscsit_add_np( struct sockaddr_in6 *sock_in6; struct iscsi_np *np; int ret; + + mutex_lock(&np_lock); + /* * Locate the existing struct iscsi_np if already active.. */ np = iscsit_get_np(sockaddr, network_transport); - if (np) + if (np) { + mutex_unlock(&np_lock); return np; + } np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); if (!np) { pr_err("Unable to allocate memory for struct iscsi_np\n"); + mutex_unlock(&np_lock); return ERR_PTR(-ENOMEM); } @@ -363,6 +388,7 @@ struct iscsi_np *iscsit_add_np( ret = iscsi_target_setup_login_socket(np, sockaddr); if (ret != 0) { kfree(np); + mutex_unlock(&np_lock); return ERR_PTR(ret); } @@ -371,6 +397,7 @@ struct iscsi_np *iscsit_add_np( pr_err("Unable to create kthread: iscsi_np\n"); ret = PTR_ERR(np->np_thread); kfree(np); + mutex_unlock(&np_lock); return ERR_PTR(ret); } /* @@ -381,14 +408,13 @@ struct iscsi_np *iscsit_add_np( * point because iscsi_np has not been added to g_np_list yet. */ np->np_exports = 1; + np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; - spin_lock_bh(&np_lock); list_add_tail(&np->np_list, &g_np_list); - spin_unlock_bh(&np_lock); + mutex_unlock(&np_lock); pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n", - np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ? - "TCP" : "SCTP"); + np->np_ip, np->np_port, np->np_transport->name); return np; } @@ -396,20 +422,10 @@ struct iscsi_np *iscsit_add_np( int iscsit_reset_np_thread( struct iscsi_np *np, struct iscsi_tpg_np *tpg_np, - struct iscsi_portal_group *tpg) + struct iscsi_portal_group *tpg, + bool shutdown) { spin_lock_bh(&np->np_thread_lock); - if (tpg && tpg_np) { - /* - * The reset operation need only be performed when the - * passed struct iscsi_portal_group has a login in progress - * to one of the network portals. - */ - if (tpg_np->tpg_np->np_login_tpg != tpg) { - spin_unlock_bh(&np->np_thread_lock); - return 0; - } - } if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { spin_unlock_bh(&np->np_thread_lock); return 0; @@ -424,14 +440,19 @@ int iscsit_reset_np_thread( } spin_unlock_bh(&np->np_thread_lock); + if (tpg_np && shutdown) { + kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); + + wait_for_completion(&tpg_np->tpg_np_comp); + } + return 0; } -static int iscsit_del_np_comm(struct iscsi_np *np) +static void iscsit_free_np(struct iscsi_np *np) { if (np->np_socket) sock_release(np->np_socket); - return 0; } int iscsit_del_np(struct iscsi_np *np) @@ -439,6 +460,7 @@ int iscsit_del_np(struct iscsi_np *np) spin_lock_bh(&np->np_thread_lock); np->np_exports--; if (np->np_exports) { + np->enabled = true; spin_unlock_bh(&np->np_thread_lock); return 0; } @@ -452,21 +474,67 @@ int iscsit_del_np(struct iscsi_np *np) */ send_sig(SIGINT, np->np_thread, 1); kthread_stop(np->np_thread); + np->np_thread = NULL; } - iscsit_del_np_comm(np); - spin_lock_bh(&np_lock); + np->np_transport->iscsit_free_np(np); + + mutex_lock(&np_lock); list_del(&np->np_list); - spin_unlock_bh(&np_lock); + mutex_unlock(&np_lock); pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n", - np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ? - "TCP" : "SCTP"); + np->np_ip, np->np_port, np->np_transport->name); + iscsit_put_transport(np->np_transport); kfree(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 void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) +{ + bool scsi_cmd = (cmd->iscsi_opcode == ISCSI_OP_SCSI_CMD); + + spin_lock_bh(&conn->cmd_lock); + if (!list_empty(&cmd->i_conn_node)) + list_del_init(&cmd->i_conn_node); + spin_unlock_bh(&conn->cmd_lock); + + __iscsit_free_cmd(cmd, scsi_cmd, true); +} + +static enum target_prot_op iscsit_get_sup_prot_ops(struct iscsi_conn *conn) +{ + return TARGET_PROT_NORMAL; +} + +static struct iscsit_transport iscsi_target_transport = { + .name = "iSCSI/TCP", + .transport_type = ISCSI_TCP, + .owner = NULL, + .iscsit_setup_np = iscsit_setup_np, + .iscsit_accept_np = iscsit_accept_np, + .iscsit_free_np = iscsit_free_np, + .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, + .iscsit_aborted_task = iscsit_aborted_task, + .iscsit_get_sup_prot_ops = iscsit_get_sup_prot_ops, +}; + static int __init iscsi_target_init_module(void) { int ret = 0; @@ -498,22 +566,13 @@ static int __init iscsi_target_init_module(void) goto ts_out1; } - lio_cmd_cache = kmem_cache_create("lio_cmd_cache", - sizeof(struct iscsi_cmd), __alignof__(struct iscsi_cmd), - 0, NULL); - if (!lio_cmd_cache) { - pr_err("Unable to kmem_cache_create() for" - " lio_cmd_cache\n"); - goto ts_out2; - } - lio_qr_cache = kmem_cache_create("lio_qr_cache", sizeof(struct iscsi_queue_req), __alignof__(struct iscsi_queue_req), 0, NULL); if (!lio_qr_cache) { pr_err("nable to kmem_cache_create() for" " lio_qr_cache\n"); - goto cmd_out; + goto ts_out2; } lio_dr_cache = kmem_cache_create("lio_dr_cache", @@ -543,6 +602,8 @@ static int __init iscsi_target_init_module(void) goto ooo_out; } + iscsit_register_transport(&iscsi_target_transport); + if (iscsit_load_discovery_tpg() < 0) goto r2t_out; @@ -555,8 +616,6 @@ dr_out: kmem_cache_destroy(lio_dr_cache); qr_out: kmem_cache_destroy(lio_qr_cache); -cmd_out: - kmem_cache_destroy(lio_cmd_cache); ts_out2: iscsi_deallocate_thread_sets(); ts_out1: @@ -573,7 +632,7 @@ static void __exit iscsi_target_cleanup_module(void) iscsi_deallocate_thread_sets(); iscsi_thread_set_free(); iscsit_release_discovery_tpg(); - kmem_cache_destroy(lio_cmd_cache); + iscsit_unregister_transport(&iscsi_target_transport); kmem_cache_destroy(lio_qr_cache); kmem_cache_destroy(lio_dr_cache); kmem_cache_destroy(lio_ooo_cache); @@ -585,30 +644,23 @@ static void __exit iscsi_target_cleanup_module(void) } static int iscsit_add_reject( + struct iscsi_conn *conn, u8 reason, - int fail_conn, - unsigned char *buf, - struct iscsi_conn *conn) + unsigned char *buf) { struct iscsi_cmd *cmd; - struct iscsi_reject *hdr; - int ret; - cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); + cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); if (!cmd) return -1; cmd->iscsi_opcode = ISCSI_OP_REJECT; - if (fail_conn) - cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; - - hdr = (struct iscsi_reject *) cmd->pdu; - hdr->reason = reason; + cmd->reject_reason = reason; cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); if (!cmd->buf_ptr) { pr_err("Unable to allocate memory for cmd->buf_ptr\n"); - iscsit_release_cmd(cmd); + iscsit_free_cmd(cmd, false); return -1; } @@ -619,23 +671,16 @@ static int iscsit_add_reject( cmd->i_state = ISTATE_SEND_REJECT; iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); - ret = wait_for_completion_interruptible(&cmd->reject_comp); - if (ret != 0) - return -1; - - return (!fail_conn) ? 0 : -1; + return -1; } -int iscsit_add_reject_from_cmd( +static int iscsit_add_reject_from_cmd( + struct iscsi_cmd *cmd, u8 reason, - int fail_conn, - int add_to_conn, - unsigned char *buf, - struct iscsi_cmd *cmd) + bool add_to_conn, + unsigned char *buf) { struct iscsi_conn *conn; - struct iscsi_reject *hdr; - int ret; if (!cmd->conn) { pr_err("cmd->conn is NULL for ITT: 0x%08x\n", @@ -645,16 +690,12 @@ int iscsit_add_reject_from_cmd( conn = cmd->conn; cmd->iscsi_opcode = ISCSI_OP_REJECT; - if (fail_conn) - cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; - - hdr = (struct iscsi_reject *) cmd->pdu; - hdr->reason = reason; + cmd->reject_reason = reason; cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); if (!cmd->buf_ptr) { pr_err("Unable to allocate memory for cmd->buf_ptr\n"); - iscsit_release_cmd(cmd); + iscsit_free_cmd(cmd, false); return -1; } @@ -666,12 +707,26 @@ int iscsit_add_reject_from_cmd( cmd->i_state = ISTATE_SEND_REJECT; iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); + /* + * Perform the kref_put now if se_cmd has already been setup by + * scsit_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); + } + return -1; +} - ret = wait_for_completion_interruptible(&cmd->reject_comp); - if (ret != 0) - return -1; +static int iscsit_add_reject_cmd(struct iscsi_cmd *cmd, u8 reason, + unsigned char *buf) +{ + return iscsit_add_reject_from_cmd(cmd, reason, true, buf); +} - return (!fail_conn) ? 0 : -1; +int iscsit_reject_cmd(struct iscsi_cmd *cmd, u8 reason, unsigned char *buf) +{ + return iscsit_add_reject_from_cmd(cmd, reason, false, buf); } /* @@ -727,24 +782,32 @@ static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) { - struct iscsi_cmd *cmd; + LIST_HEAD(ack_list); + struct iscsi_cmd *cmd, *cmd_p; conn->exp_statsn = exp_statsn; + if (conn->sess->sess_ops->RDMAExtensions) + return; + spin_lock_bh(&conn->cmd_lock); - list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { + list_for_each_entry_safe(cmd, cmd_p, &conn->conn_cmd_list, i_conn_node) { spin_lock(&cmd->istate_lock); if ((cmd->i_state == ISTATE_SENT_STATUS) && iscsi_sna_lt(cmd->stat_sn, exp_statsn)) { cmd->i_state = ISTATE_REMOVE; spin_unlock(&cmd->istate_lock); - iscsit_add_cmd_to_immediate_queue(cmd, conn, - cmd->i_state); + list_move_tail(&cmd->i_conn_node, &ack_list); continue; } spin_unlock(&cmd->istate_lock); } spin_unlock_bh(&conn->cmd_lock); + + list_for_each_entry_safe(cmd, cmd_p, &ack_list, i_conn_node) { + list_del_init(&cmd->i_conn_node); + iscsit_free_cmd(cmd, false); + } } static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) @@ -763,24 +826,15 @@ static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) return 0; } -static int iscsit_handle_scsi_cmd( - struct iscsi_conn *conn, - unsigned char *buf) +int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + unsigned char *buf) { - int data_direction, payload_length, cmdsn_ret = 0, immed_ret; - struct iscsi_cmd *cmd = NULL; + int data_direction, payload_length; struct iscsi_scsi_req *hdr; int iscsi_task_attr; int sam_task_attr; - spin_lock_bh(&conn->sess->session_stats_lock); - conn->sess->cmd_pdus++; - if (conn->sess->se_sess->se_node_acl) { - spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); - conn->sess->se_sess->se_node_acl->num_cmds++; - spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); - } - spin_unlock_bh(&conn->sess->session_stats_lock); + atomic_long_inc(&conn->sess->cmd_pdus); hdr = (struct iscsi_scsi_req *) buf; payload_length = ntoh24(hdr->dlength); @@ -791,104 +845,97 @@ static int iscsit_handle_scsi_cmd( !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" " not set. Bad iSCSI Initiator.\n"); - return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, - buf, conn); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_INVALID, buf); } if (((hdr->flags & ISCSI_FLAG_CMD_READ) || (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { /* - * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2) - * that adds support for RESERVE/RELEASE. There is a bug - * add with this new functionality that sets R/W bits when - * neither CDB carries any READ or WRITE datapayloads. + * From RFC-3720 Section 10.3.1: + * + * "Either or both of R and W MAY be 1 when either the + * Expected Data Transfer Length and/or Bidirectional Read + * Expected Data Transfer Length are 0" + * + * For this case, go ahead and clear the unnecssary bits + * to avoid any confusion with ->data_direction. */ - if ((hdr->cdb[0] == 0x16) || (hdr->cdb[0] == 0x17)) { - hdr->flags &= ~ISCSI_FLAG_CMD_READ; - hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; - goto done; - } + hdr->flags &= ~ISCSI_FLAG_CMD_READ; + hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; - pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" + pr_warn("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" " set when Expected Data Transfer Length is 0 for" - " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr->cdb[0]); - return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, - buf, conn); + " CDB: 0x%02x, Fixing up flags\n", hdr->cdb[0]); } -done: if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" " MUST be set if Expected Data Transfer Length is not 0." " Bad iSCSI Initiator\n"); - return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, - buf, conn); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_INVALID, buf); } if ((hdr->flags & ISCSI_FLAG_CMD_READ) && (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { pr_err("Bidirectional operations not supported!\n"); - return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, - buf, conn); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_INVALID, buf); } if (hdr->opcode & ISCSI_OP_IMMEDIATE) { pr_err("Illegally set Immediate Bit in iSCSI Initiator" " Scsi Command PDU.\n"); - return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, - buf, conn); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_INVALID, buf); } if (payload_length && !conn->sess->sess_ops->ImmediateData) { pr_err("ImmediateData=No but DataSegmentLength=%u," " protocol error.\n", payload_length); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_PROTOCOL_ERROR, buf); } - if ((be32_to_cpu(hdr->data_length )== payload_length) && + if ((be32_to_cpu(hdr->data_length) == payload_length) && (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { pr_err("Expected Data Transfer Length and Length of" " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" " bit is not set protocol error\n"); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_PROTOCOL_ERROR, buf); } if (payload_length > be32_to_cpu(hdr->data_length)) { pr_err("DataSegmentLength: %u is greater than" " EDTL: %u, protocol error.\n", payload_length, hdr->data_length); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_PROTOCOL_ERROR, buf); } if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { pr_err("DataSegmentLength: %u is greater than" " MaxXmitDataSegmentLength: %u, protocol error.\n", payload_length, conn->conn_ops->MaxXmitDataSegmentLength); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_PROTOCOL_ERROR, buf); } if (payload_length > conn->sess->sess_ops->FirstBurstLength) { pr_err("DataSegmentLength: %u is greater than" " FirstBurstLength: %u, protocol error.\n", payload_length, conn->sess->sess_ops->FirstBurstLength); - return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, - buf, conn); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_INVALID, buf); } data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : DMA_NONE; - cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); - if (!cmd) - return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1, - buf, conn); - cmd->data_direction = data_direction; iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; /* @@ -931,14 +978,14 @@ done: cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); cmd->first_burst_len = payload_length; - if (cmd->data_direction == DMA_FROM_DEVICE) { + if (!conn->sess->sess_ops->RDMAExtensions && + cmd->data_direction == DMA_FROM_DEVICE) { struct iscsi_datain_req *dr; dr = iscsit_allocate_datain_req(); if (!dr) - return iscsit_add_reject_from_cmd( - ISCSI_REASON_BOOKMARK_NO_RESOURCES, - 1, 1, buf, cmd); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); iscsit_attach_datain_req(cmd, dr); } @@ -953,7 +1000,10 @@ done: pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, - hdr->cmdsn, hdr->data_length, payload_length, conn->cid); + hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length, + conn->cid); + + target_get_sess_cmd(conn->sess->se_sess, &cmd->se_cmd, true); cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd, scsilun_to_int(&hdr->lun)); @@ -963,18 +1013,16 @@ done: cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); if (cmd->sense_reason) { if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) { - return iscsit_add_reject_from_cmd( - ISCSI_REASON_BOOKMARK_NO_RESOURCES, - 1, 1, buf, cmd); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); } goto attach_cmd; } if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) { - return iscsit_add_reject_from_cmd( - ISCSI_REASON_BOOKMARK_NO_RESOURCES, - 1, 1, buf, cmd); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); } attach_cmd: @@ -987,12 +1035,24 @@ attach_cmd: */ core_alua_check_nonop_delay(&cmd->se_cmd); - if (iscsit_allocate_iovecs(cmd) < 0) { - return iscsit_add_reject_from_cmd( - ISCSI_REASON_BOOKMARK_NO_RESOURCES, - 1, 0, buf, cmd); - } + return 0; +} +EXPORT_SYMBOL(iscsit_setup_scsi_cmd); +void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *cmd) +{ + iscsit_set_dataout_sequence_values(cmd); + + spin_lock_bh(&cmd->dataout_timeout_lock); + iscsit_start_dataout_timer(cmd, cmd->conn); + spin_unlock_bh(&cmd->dataout_timeout_lock); +} +EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout); + +int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + struct iscsi_scsi_req *hdr) +{ + int cmdsn_ret = 0; /* * Check the CmdSN against ExpCmdSN/MaxCmdSN here if * the Immediate Bit is not set, and no Immediate @@ -1004,13 +1064,14 @@ attach_cmd: * be acknowledged. (See below) */ if (!cmd->immediate_data) { - cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); - if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) + cmdsn_ret = iscsit_sequence_cmd(conn, cmd, + (unsigned char *)hdr, hdr->cmdsn); + if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) + return -1; + else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { + target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); return 0; - else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) - return iscsit_add_reject_from_cmd( - ISCSI_REASON_PROTOCOL_ERROR, - 1, 0, buf, cmd); + } } iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); @@ -1019,37 +1080,52 @@ attach_cmd: * If no Immediate Data is attached, it's OK to return now. */ if (!cmd->immediate_data) { - if (!cmd->sense_reason && cmd->unsolicited_data) { - iscsit_set_dataout_sequence_values(cmd); - - spin_lock_bh(&cmd->dataout_timeout_lock); - iscsit_start_dataout_timer(cmd, cmd->conn); - spin_unlock_bh(&cmd->dataout_timeout_lock); - } + if (!cmd->sense_reason && cmd->unsolicited_data) + iscsit_set_unsoliticed_dataout(cmd); + if (!cmd->sense_reason) + return 0; + target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); return 0; } /* - * Early CHECK_CONDITIONs never make it to the transport processing - * thread. They are processed in CmdSN order by - * iscsit_check_received_cmdsn() below. + * Early CHECK_CONDITIONs with ImmediateData never make it to command + * execution. These exceptions are processed in CmdSN order using + * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below. */ if (cmd->sense_reason) { - immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; - goto after_immediate_data; + if (cmd->reject_reason) + return 0; + + return 1; } /* * Call directly into transport_generic_new_cmd() to perform * the backend memory allocation. */ cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd); - if (cmd->sense_reason) { - immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; + if (cmd->sense_reason) + return 1; + + return 0; +} +EXPORT_SYMBOL(iscsit_process_scsi_cmd); + +static int +iscsit_get_immediate_data(struct iscsi_cmd *cmd, struct iscsi_scsi_req *hdr, + bool dump_payload) +{ + struct iscsi_conn *conn = cmd->conn; + int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; + /* + * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes. + */ + if (dump_payload) goto after_immediate_data; - } - immed_ret = iscsit_handle_immediate_data(cmd, buf, payload_length); + immed_ret = iscsit_handle_immediate_data(cmd, hdr, + cmd->first_burst_len); after_immediate_data: if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { /* @@ -1057,26 +1133,20 @@ after_immediate_data: * DataCRC, check against ExpCmdSN/MaxCmdSN if * Immediate Bit is not set. */ - cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); - /* - * Special case for Unsupported SAM WRITE Opcodes - * and ImmediateData=Yes. - */ - if (cmd->sense_reason) { - if (iscsit_dump_data_payload(conn, payload_length, 1) < 0) - return -1; - } else if (cmd->unsolicited_data) { - iscsit_set_dataout_sequence_values(cmd); + cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd, + (unsigned char *)hdr, hdr->cmdsn); + if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) + return -1; - spin_lock_bh(&cmd->dataout_timeout_lock); - iscsit_start_dataout_timer(cmd, cmd->conn); - spin_unlock_bh(&cmd->dataout_timeout_lock); - } + if (cmd->sense_reason || cmdsn_ret == CMDSN_LOWER_THAN_EXP) { + int rc; - if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) - return iscsit_add_reject_from_cmd( - ISCSI_REASON_PROTOCOL_ERROR, - 1, 0, buf, cmd); + rc = iscsit_dump_data_payload(cmd->conn, + cmd->first_burst_len, 1); + target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); + return rc; + } else if (cmd->unsolicited_data) + iscsit_set_unsoliticed_dataout(cmd); } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { /* @@ -1091,13 +1161,46 @@ after_immediate_data: * CmdSN and issue a retry to plug the sequence. */ cmd->i_state = ISTATE_REMOVE; - iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); + iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, cmd->i_state); } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ return -1; return 0; } +static int +iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + unsigned char *buf) +{ + struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; + int rc, immed_data; + bool dump_payload = false; + + rc = iscsit_setup_scsi_cmd(conn, cmd, buf); + if (rc < 0) + return 0; + /* + * Allocation iovecs needed for struct socket operations for + * traditional iSCSI block I/O. + */ + if (iscsit_allocate_iovecs(cmd) < 0) { + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); + } + immed_data = cmd->immediate_data; + + rc = iscsit_process_scsi_cmd(conn, cmd, hdr); + if (rc < 0) + return rc; + else if (rc > 0) + dump_payload = true; + + if (!immed_data) + return 0; + + return iscsit_get_immediate_data(cmd, hdr, dump_payload); +} + static u32 iscsit_do_crypto_hash_sg( struct hash_desc *hash, struct iscsi_cmd *cmd, @@ -1140,7 +1243,7 @@ static u32 iscsit_do_crypto_hash_sg( static void iscsit_do_crypto_hash_buf( struct hash_desc *hash, - unsigned char *buf, + const void *buf, u32 payload_length, u32 padding, u8 *pad_bytes, @@ -1160,43 +1263,30 @@ static void iscsit_do_crypto_hash_buf( crypto_hash_final(hash, data_crc); } -static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) +int +iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf, + struct iscsi_cmd **out_cmd) { - int iov_ret, ooo_cmdsn = 0, ret; - u8 data_crc_failed = 0; - u32 checksum, iov_count = 0, padding = 0, rx_got = 0; - u32 rx_size = 0, payload_length; + struct iscsi_data *hdr = (struct iscsi_data *)buf; struct iscsi_cmd *cmd = NULL; struct se_cmd *se_cmd; - struct iscsi_data *hdr; - struct kvec *iov; - unsigned long flags; - - hdr = (struct iscsi_data *) buf; - payload_length = ntoh24(hdr->dlength); + u32 payload_length = ntoh24(hdr->dlength); + int rc; if (!payload_length) { - pr_err("DataOUT payload is ZERO, protocol error.\n"); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + pr_warn("DataOUT payload is ZERO, ignoring.\n"); + return 0; } /* iSCSI write */ - spin_lock_bh(&conn->sess->session_stats_lock); - conn->sess->rx_data_octets += payload_length; - if (conn->sess->se_sess->se_node_acl) { - spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); - conn->sess->se_sess->se_node_acl->write_bytes += payload_length; - spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); - } - spin_unlock_bh(&conn->sess->session_stats_lock); + atomic_long_add(payload_length, &conn->sess->rx_data_octets); if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { pr_err("DataSegmentLength: %u is greater than" " MaxXmitDataSegmentLength: %u\n", payload_length, conn->conn_ops->MaxXmitDataSegmentLength); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, + buf); } cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, @@ -1206,7 +1296,7 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", - hdr->itt, hdr->ttt, hdr->datasn, hdr->offset, + hdr->itt, hdr->ttt, hdr->datasn, ntohl(hdr->offset), payload_length, conn->cid); if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { @@ -1219,8 +1309,7 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) if (cmd->data_direction != DMA_TO_DEVICE) { pr_err("Command ITT: 0x%08x received DataOUT for a" " NON-WRITE command.\n", cmd->init_task_tag); - return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, - 1, 0, buf, cmd); + return iscsit_dump_data_payload(conn, payload_length, 1); } se_cmd = &cmd->se_cmd; iscsit_mod_dataout_timer(cmd); @@ -1229,8 +1318,7 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) pr_err("DataOut Offset: %u, Length %u greater than" " iSCSI Command EDTL %u, protocol error.\n", hdr->offset, payload_length, cmd->se_cmd.data_length); - return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, - 1, 0, buf, cmd); + return iscsit_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_INVALID, buf); } if (cmd->unsolicited_data) { @@ -1250,14 +1338,9 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) */ /* Something's amiss if we're not in WRITE_PENDING state... */ - spin_lock_irqsave(&se_cmd->t_state_lock, flags); WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); - spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); - - spin_lock_irqsave(&se_cmd->t_state_lock, flags); if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE)) dump_unsolicited_data = 1; - spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); if (dump_unsolicited_data) { /* @@ -1298,12 +1381,26 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and * within-command recovery checks before receiving the payload. */ - ret = iscsit_check_pre_dataout(cmd, buf); - if (ret == DATAOUT_WITHIN_COMMAND_RECOVERY) + rc = iscsit_check_pre_dataout(cmd, buf); + if (rc == DATAOUT_WITHIN_COMMAND_RECOVERY) return 0; - else if (ret == DATAOUT_CANNOT_RECOVER) + else if (rc == DATAOUT_CANNOT_RECOVER) return -1; + *out_cmd = cmd; + return 0; +} +EXPORT_SYMBOL(iscsit_check_dataout_hdr); + +static int +iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + struct iscsi_data *hdr) +{ + struct kvec *iov; + u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0; + u32 payload_length = ntoh24(hdr->dlength); + int iov_ret, data_crc_failed = 0; + rx_size += payload_length; iov = &cmd->iov_data[0]; @@ -1356,17 +1453,27 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) payload_length); } } + + return data_crc_failed; +} + +int +iscsit_check_dataout_payload(struct iscsi_cmd *cmd, struct iscsi_data *hdr, + bool data_crc_failed) +{ + struct iscsi_conn *conn = cmd->conn; + int rc, ooo_cmdsn; /* * Increment post receive data and CRC values or perform * within-command recovery. */ - ret = iscsit_check_post_dataout(cmd, buf, data_crc_failed); - if ((ret == DATAOUT_NORMAL) || (ret == DATAOUT_WITHIN_COMMAND_RECOVERY)) + rc = iscsit_check_post_dataout(cmd, (unsigned char *)hdr, data_crc_failed); + if ((rc == DATAOUT_NORMAL) || (rc == DATAOUT_WITHIN_COMMAND_RECOVERY)) return 0; - else if (ret == DATAOUT_SEND_R2T) { + else if (rc == DATAOUT_SEND_R2T) { iscsit_set_dataout_sequence_values(cmd); - iscsit_build_r2ts_for_cmd(cmd, conn, false); - } else if (ret == DATAOUT_SEND_TO_TRANSPORT) { + conn->conn_transport->iscsit_get_dataout(conn, cmd, false); + } else if (rc == DATAOUT_SEND_TO_TRANSPORT) { /* * Handle extra special case for out of order * Unsolicited Data Out. @@ -1387,26 +1494,54 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) return 0; } +EXPORT_SYMBOL(iscsit_check_dataout_payload); -static int iscsit_handle_nop_out( - struct iscsi_conn *conn, - unsigned char *buf) +static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) { - unsigned char *ping_data = NULL; - int cmdsn_ret, niov = 0, ret = 0, rx_got, rx_size; - u32 checksum, data_crc, padding = 0, payload_length; struct iscsi_cmd *cmd = NULL; - struct kvec *iov = NULL; - struct iscsi_nopout *hdr; + struct iscsi_data *hdr = (struct iscsi_data *)buf; + int rc; + bool data_crc_failed = false; - hdr = (struct iscsi_nopout *) buf; - payload_length = ntoh24(hdr->dlength); + rc = iscsit_check_dataout_hdr(conn, buf, &cmd); + if (rc < 0) + return 0; + else if (!cmd) + return 0; + + rc = iscsit_get_dataout(conn, cmd, hdr); + if (rc < 0) + return rc; + else if (rc > 0) + data_crc_failed = true; + + return iscsit_check_dataout_payload(cmd, hdr, data_crc_failed); +} + +int iscsit_setup_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + struct iscsi_nopout *hdr) +{ + u32 payload_length = ntoh24(hdr->dlength); + + if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { + pr_err("NopOUT Flag's, Left Most Bit not set, protocol error.\n"); + if (!cmd) + return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, + (unsigned char *)hdr); + + return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, + (unsigned char *)hdr); + } if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { pr_err("NOPOUT ITT is reserved, but Immediate Bit is" " not set, protocol error.\n"); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + if (!cmd) + return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, + (unsigned char *)hdr); + + return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, + (unsigned char *)hdr); } if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { @@ -1414,11 +1549,15 @@ static int iscsit_handle_nop_out( " greater than MaxXmitDataSegmentLength: %u, protocol" " error.\n", payload_length, conn->conn_ops->MaxXmitDataSegmentLength); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + if (!cmd) + return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, + (unsigned char *)hdr); + + return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, + (unsigned char *)hdr); } - pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%09x," + pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x," " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", hdr->itt == RESERVED_ITT ? "Response" : "Request", hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, @@ -1431,12 +1570,6 @@ static int iscsit_handle_nop_out( * can contain ping data. */ if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { - cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); - if (!cmd) - return iscsit_add_reject( - ISCSI_REASON_BOOKMARK_NO_RESOURCES, - 1, buf, conn); - cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; cmd->i_state = ISTATE_SEND_NOPIN; cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? @@ -1448,8 +1581,87 @@ static int iscsit_handle_nop_out( cmd->data_direction = DMA_NONE; } + return 0; +} +EXPORT_SYMBOL(iscsit_setup_nop_out); + +int iscsit_process_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + struct iscsi_nopout *hdr) +{ + struct iscsi_cmd *cmd_p = NULL; + int cmdsn_ret = 0; + /* + * Initiator is expecting a NopIN ping reply.. + */ + if (hdr->itt != RESERVED_ITT) { + if (!cmd) + return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, + (unsigned char *)hdr); + + spin_lock_bh(&conn->cmd_lock); + list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); + spin_unlock_bh(&conn->cmd_lock); + + iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); + + if (hdr->opcode & ISCSI_OP_IMMEDIATE) { + iscsit_add_cmd_to_response_queue(cmd, conn, + cmd->i_state); + return 0; + } + + cmdsn_ret = iscsit_sequence_cmd(conn, cmd, + (unsigned char *)hdr, hdr->cmdsn); + if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) + return 0; + if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) + return -1; + + return 0; + } + /* + * This was a response to a unsolicited NOPIN ping. + */ + if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { + cmd_p = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); + if (!cmd_p) + return -EINVAL; + + iscsit_stop_nopin_response_timer(conn); + + cmd_p->i_state = ISTATE_REMOVE; + iscsit_add_cmd_to_immediate_queue(cmd_p, conn, cmd_p->i_state); + + iscsit_start_nopin_timer(conn); + return 0; + } + /* + * Otherwise, initiator is not expecting a NOPIN is response. + * Just ignore for now. + */ + return 0; +} +EXPORT_SYMBOL(iscsit_process_nop_out); + +static int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + unsigned char *buf) +{ + unsigned char *ping_data = NULL; + struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; + struct kvec *iov = NULL; + u32 payload_length = ntoh24(hdr->dlength); + int ret; + + ret = iscsit_setup_nop_out(conn, cmd, hdr); + if (ret < 0) + return 0; + /* + * Handle NOP-OUT payload for traditional iSCSI sockets + */ if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { - rx_size = payload_length; + u32 checksum, data_crc, padding = 0; + int niov = 0, rx_got, rx_size = payload_length; + ping_data = kzalloc(payload_length + 1, GFP_KERNEL); if (!ping_data) { pr_err("Unable to allocate memory for" @@ -1528,86 +1740,24 @@ static int iscsit_handle_nop_out( pr_debug("Ping Data: \"%s\"\n", ping_data); } - if (hdr->itt != RESERVED_ITT) { - if (!cmd) { - pr_err("Checking CmdSN for NOPOUT," - " but cmd is NULL!\n"); - return -1; - } - /* - * Initiator is expecting a NopIN ping reply, - */ - spin_lock_bh(&conn->cmd_lock); - list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); - spin_unlock_bh(&conn->cmd_lock); - - iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); - - if (hdr->opcode & ISCSI_OP_IMMEDIATE) { - iscsit_add_cmd_to_response_queue(cmd, conn, - cmd->i_state); - return 0; - } - - cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); - if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { - ret = 0; - goto ping_out; - } - if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) - return iscsit_add_reject_from_cmd( - ISCSI_REASON_PROTOCOL_ERROR, - 1, 0, buf, cmd); - - return 0; - } - - if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { - /* - * This was a response to a unsolicited NOPIN ping. - */ - cmd = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); - if (!cmd) - return -1; - - iscsit_stop_nopin_response_timer(conn); - - cmd->i_state = ISTATE_REMOVE; - iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); - iscsit_start_nopin_timer(conn); - } else { - /* - * Initiator is not expecting a NOPIN is response. - * Just ignore for now. - * - * iSCSI v19-91 10.18 - * "A NOP-OUT may also be used to confirm a changed - * ExpStatSN if another PDU will not be available - * for a long time." - */ - ret = 0; - goto out; - } - - return 0; + return iscsit_process_nop_out(conn, cmd, hdr); out: if (cmd) - iscsit_release_cmd(cmd); -ping_out: + iscsit_free_cmd(cmd, false); + kfree(ping_data); return ret; } -static int iscsit_handle_task_mgt_cmd( - struct iscsi_conn *conn, - unsigned char *buf) +int +iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + unsigned char *buf) { - struct iscsi_cmd *cmd; struct se_tmr_req *se_tmr; struct iscsi_tmr_req *tmr_req; struct iscsi_tm *hdr; - int out_of_order_cmdsn = 0; - int ret; + int out_of_order_cmdsn = 0, ret; + bool sess_ref = false; u8 function; hdr = (struct iscsi_tm *) buf; @@ -1631,27 +1781,22 @@ static int iscsit_handle_task_mgt_cmd( pr_err("Task Management Request TASK_REASSIGN not" " issued as immediate command, bad iSCSI Initiator" "implementation\n"); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_PROTOCOL_ERROR, buf); } if ((function != ISCSI_TM_FUNC_ABORT_TASK) && be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG) hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG); - cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); - if (!cmd) - return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, - 1, buf, conn); - cmd->data_direction = DMA_NONE; cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); if (!cmd->tmr_req) { pr_err("Unable to allocate memory for" " Task Management command!\n"); - return iscsit_add_reject_from_cmd( - ISCSI_REASON_BOOKMARK_NO_RESOURCES, - 1, 1, buf, cmd); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_NO_RESOURCES, + buf); } /* @@ -1668,6 +1813,9 @@ static int iscsit_handle_task_mgt_cmd( conn->sess->se_sess, 0, DMA_NONE, MSG_SIMPLE_TAG, cmd->sense_buffer + 2); + target_get_sess_cmd(conn->sess->se_sess, &cmd->se_cmd, true); + sess_ref = true; + switch (function) { case ISCSI_TM_FUNC_ABORT_TASK: tcm_function = TMR_ABORT_TASK; @@ -1693,17 +1841,15 @@ static int iscsit_handle_task_mgt_cmd( default: pr_err("Unknown iSCSI TMR Function:" " 0x%02x\n", function); - return iscsit_add_reject_from_cmd( - ISCSI_REASON_BOOKMARK_NO_RESOURCES, - 1, 1, buf, cmd); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); } ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, tcm_function, GFP_KERNEL); if (ret < 0) - return iscsit_add_reject_from_cmd( - ISCSI_REASON_BOOKMARK_NO_RESOURCES, - 1, 1, buf, cmd); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; } @@ -1762,9 +1908,8 @@ static int iscsit_handle_task_mgt_cmd( break; if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) - return iscsit_add_reject_from_cmd( - ISCSI_REASON_BOOKMARK_INVALID, 1, 1, - buf, cmd); + return iscsit_add_reject_cmd(cmd, + ISCSI_REASON_BOOKMARK_INVALID, buf); break; default: pr_err("Unknown TMR function: 0x%02x, protocol" @@ -1782,15 +1927,13 @@ attach: spin_unlock_bh(&conn->cmd_lock); if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { - int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); + int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) out_of_order_cmdsn = 1; else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) return 0; else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) - return iscsit_add_reject_from_cmd( - ISCSI_REASON_PROTOCOL_ERROR, - 1, 0, buf, cmd); + return -1; } iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); @@ -1810,50 +1953,142 @@ attach: * For connection recovery, this is also the default action for * TMR TASK_REASSIGN. */ + if (sess_ref) { + pr_debug("Handle TMR, using sess_ref=true check\n"); + target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); + } + iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); return 0; } +EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd); /* #warning FIXME: Support Text Command parameters besides SendTargets */ -static int iscsit_handle_text_cmd( - struct iscsi_conn *conn, - unsigned char *buf) +int +iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + struct iscsi_text *hdr) { - char *text_ptr, *text_in; - int cmdsn_ret, niov = 0, rx_got, rx_size; - u32 checksum = 0, data_crc = 0, payload_length; - u32 padding = 0, pad_bytes = 0, text_length = 0; - struct iscsi_cmd *cmd; - struct kvec iov[3]; - struct iscsi_text *hdr; - - hdr = (struct iscsi_text *) buf; - payload_length = ntoh24(hdr->dlength); + u32 payload_length = ntoh24(hdr->dlength); if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { pr_err("Unable to accept text parameter length: %u" "greater than MaxXmitDataSegmentLength %u.\n", payload_length, conn->conn_ops->MaxXmitDataSegmentLength); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, + (unsigned char *)hdr); + } + + if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL) || + (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)) { + pr_err("Multi sequence text commands currently not supported\n"); + return iscsit_reject_cmd(cmd, ISCSI_REASON_CMD_NOT_SUPPORTED, + (unsigned char *)hdr); } pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, hdr->exp_statsn, payload_length); - rx_size = text_length = payload_length; - if (text_length) { - text_in = kzalloc(text_length, GFP_KERNEL); + cmd->iscsi_opcode = ISCSI_OP_TEXT; + cmd->i_state = ISTATE_SEND_TEXTRSP; + cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); + conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; + cmd->targ_xfer_tag = 0xFFFFFFFF; + cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); + cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); + cmd->data_direction = DMA_NONE; + + return 0; +} +EXPORT_SYMBOL(iscsit_setup_text_cmd); + +int +iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + struct iscsi_text *hdr) +{ + unsigned char *text_in = cmd->text_in_ptr, *text_ptr; + int cmdsn_ret; + + if (!text_in) { + pr_err("Unable to locate text_in buffer for sendtargets" + " discovery\n"); + goto reject; + } + if (strncmp("SendTargets", text_in, 11) != 0) { + pr_err("Received Text Data that is not" + " SendTargets, cannot continue.\n"); + goto reject; + } + text_ptr = strchr(text_in, '='); + if (!text_ptr) { + pr_err("No \"=\" separator found in Text Data," + " cannot continue.\n"); + goto reject; + } + if (!strncmp("=All", text_ptr, 4)) { + cmd->cmd_flags |= IFC_SENDTARGETS_ALL; + } else if (!strncmp("=iqn.", text_ptr, 5) || + !strncmp("=eui.", text_ptr, 5)) { + cmd->cmd_flags |= IFC_SENDTARGETS_SINGLE; + } else { + pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr); + goto reject; + } + + spin_lock_bh(&conn->cmd_lock); + list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); + spin_unlock_bh(&conn->cmd_lock); + + iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); + + if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { + cmdsn_ret = iscsit_sequence_cmd(conn, cmd, + (unsigned char *)hdr, hdr->cmdsn); + if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) + return -1; + + return 0; + } + + return iscsit_execute_cmd(cmd, 0); + +reject: + return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, + (unsigned char *)hdr); +} +EXPORT_SYMBOL(iscsit_process_text_cmd); + +static int +iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + unsigned char *buf) +{ + struct iscsi_text *hdr = (struct iscsi_text *)buf; + char *text_in = NULL; + u32 payload_length = ntoh24(hdr->dlength); + int rx_size, rc; + + rc = iscsit_setup_text_cmd(conn, cmd, hdr); + if (rc < 0) + return 0; + + rx_size = payload_length; + if (payload_length) { + u32 checksum = 0, data_crc = 0; + u32 padding = 0, pad_bytes = 0; + int niov = 0, rx_got; + struct kvec iov[3]; + + text_in = kzalloc(payload_length, GFP_KERNEL); if (!text_in) { pr_err("Unable to allocate memory for" " incoming text parameters\n"); - return -1; + goto reject; } + cmd->text_in_ptr = text_in; memset(iov, 0, 3 * sizeof(struct kvec)); iov[niov].iov_base = text_in; - iov[niov++].iov_len = text_length; + iov[niov++].iov_len = payload_length; padding = ((-payload_length) & 3); if (padding != 0) { @@ -1870,14 +2105,12 @@ static int iscsit_handle_text_cmd( } rx_got = rx_data(conn, &iov[0], niov, rx_size); - if (rx_got != rx_size) { - kfree(text_in); - return -1; - } + if (rx_got != rx_size) + goto reject; if (conn->conn_ops->DataDigest) { iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, - text_in, text_length, + text_in, payload_length, padding, (u8 *)&pad_bytes, (u8 *)&data_crc); @@ -1889,8 +2122,7 @@ static int iscsit_handle_text_cmd( pr_err("Unable to recover from" " Text Data digest failure while in" " ERL=0.\n"); - kfree(text_in); - return -1; + goto reject; } else { /* * Silently drop this PDU and let the @@ -1905,68 +2137,22 @@ static int iscsit_handle_text_cmd( } else { pr_debug("Got CRC32C DataDigest" " 0x%08x for %u bytes of text data.\n", - checksum, text_length); + checksum, payload_length); } } - text_in[text_length - 1] = '\0'; + text_in[payload_length - 1] = '\0'; pr_debug("Successfully read %d bytes of text" - " data.\n", text_length); - - if (strncmp("SendTargets", text_in, 11) != 0) { - pr_err("Received Text Data that is not" - " SendTargets, cannot continue.\n"); - kfree(text_in); - return -1; - } - text_ptr = strchr(text_in, '='); - if (!text_ptr) { - pr_err("No \"=\" separator found in Text Data," - " cannot continue.\n"); - kfree(text_in); - return -1; - } - if (strncmp("=All", text_ptr, 4) != 0) { - pr_err("Unable to locate All value for" - " SendTargets key, cannot continue.\n"); - kfree(text_in); - return -1; - } -/*#warning Support SendTargets=(iSCSI Target Name/Nothing) values. */ - kfree(text_in); + " data.\n", payload_length); } - cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); - if (!cmd) - return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, - 1, buf, conn); - - cmd->iscsi_opcode = ISCSI_OP_TEXT; - cmd->i_state = ISTATE_SEND_TEXTRSP; - cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); - conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; - cmd->targ_xfer_tag = 0xFFFFFFFF; - cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); - cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); - cmd->data_direction = DMA_NONE; - - spin_lock_bh(&conn->cmd_lock); - list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); - spin_unlock_bh(&conn->cmd_lock); - - iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); - - if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { - cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); - if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) - return iscsit_add_reject_from_cmd( - ISCSI_REASON_PROTOCOL_ERROR, - 1, 0, buf, cmd); - - return 0; - } + return iscsit_process_text_cmd(conn, cmd, hdr); - return iscsit_execute_cmd(cmd, 0); +reject: + kfree(cmd->text_in_ptr); + cmd->text_in_ptr = NULL; + return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, buf); } +EXPORT_SYMBOL(iscsit_handle_text_cmd); int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) { @@ -2075,13 +2261,12 @@ int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn return 0; } -static int iscsit_handle_logout_cmd( - struct iscsi_conn *conn, - unsigned char *buf) +int +iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, + unsigned char *buf) { int cmdsn_ret, logout_remove = 0; u8 reason_code = 0; - struct iscsi_cmd *cmd; struct iscsi_logout *hdr; struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); @@ -2105,14 +2290,10 @@ static int iscsit_handle_logout_cmd( if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { pr_err("Received logout request on connection that" " is not in logged in state, ignoring request.\n"); + iscsit_free_cmd(cmd, false); return 0; } - cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); - if (!cmd) - return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1, - buf, conn); - cmd->iscsi_opcode = ISCSI_OP_LOGOUT; cmd->i_state = ISTATE_SEND_LOGOUTRSP; cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); @@ -2150,18 +2331,16 @@ static int iscsit_handle_logout_cmd( if (ret < 0) return ret; } else { - cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); - if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { + cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); + if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) logout_remove = 0; - } else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) { - return iscsit_add_reject_from_cmd( - ISCSI_REASON_PROTOCOL_ERROR, - 1, 0, buf, cmd); - } + else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) + return -1; } return logout_remove; } +EXPORT_SYMBOL(iscsit_handle_logout_cmd); static int iscsit_handle_snack( struct iscsi_conn *conn, @@ -2180,8 +2359,8 @@ static int iscsit_handle_snack( if (!conn->sess->sess_ops->ErrorRecoveryLevel) { pr_err("Initiator sent SNACK request while in" " ErrorRecoveryLevel=0.\n"); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, + buf); } /* * SNACK_DATA and SNACK_R2T are both 0, so check which function to @@ -2205,13 +2384,13 @@ static int iscsit_handle_snack( case ISCSI_FLAG_SNACK_TYPE_RDATA: /* FIXME: Support R-Data SNACK */ pr_err("R-Data SNACK Not Supported.\n"); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, + buf); default: pr_err("Unknown SNACK type 0x%02x, protocol" " error.\n", hdr->flags & 0x0f); - return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buf, conn); + return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, + buf); } return 0; @@ -2229,7 +2408,7 @@ static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) static int iscsit_handle_immediate_data( struct iscsi_cmd *cmd, - unsigned char *buf, + struct iscsi_scsi_req *hdr, u32 length) { int iov_ret, rx_got = 0, rx_size = 0; @@ -2283,14 +2462,14 @@ static int iscsit_handle_immediate_data( pr_err("Unable to recover from" " Immediate Data digest failure while" " in ERL=0.\n"); - iscsit_add_reject_from_cmd( + iscsit_reject_cmd(cmd, ISCSI_REASON_DATA_DIGEST_ERROR, - 1, 0, buf, cmd); + (unsigned char *)hdr); return IMMEDIATE_DATA_CANNOT_RECOVER; } else { - iscsit_add_reject_from_cmd( + iscsit_reject_cmd(cmd, ISCSI_REASON_DATA_DIGEST_ERROR, - 0, 0, buf, cmd); + (unsigned char *)hdr); return IMMEDIATE_DATA_ERL1_CRC_FAILURE; } } else { @@ -2321,6 +2500,7 @@ static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) { struct iscsi_cmd *cmd; struct iscsi_conn *conn_p; + bool found = false; /* * Only send a Asynchronous Message on connections whos network @@ -2329,14 +2509,15 @@ static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { iscsit_inc_conn_usage_count(conn_p); + found = true; break; } } - if (!conn_p) + if (!found) return; - cmd = iscsit_allocate_cmd(conn_p, GFP_ATOMIC); + cmd = iscsit_allocate_cmd(conn_p, TASK_RUNNING); if (!cmd) { iscsit_dec_conn_usage_count(conn_p); return; @@ -2381,9 +2562,8 @@ static int iscsit_send_conn_drop_async_message( if (conn->conn_ops->HeaderDigest) { u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)header_digest); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, + ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); cmd->tx_size += ISCSI_CRC_LEN; pr_debug("Attaching CRC32C HeaderDigest to" @@ -2410,18 +2590,60 @@ 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); @@ -2430,7 +2652,6 @@ static int iscsit_send_data_in( cmd->init_task_tag); return -1; } - /* * Be paranoid and double check the logic for now. */ @@ -2438,18 +2659,11 @@ 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; } - spin_lock_bh(&conn->sess->session_stats_lock); - conn->sess->tx_data_octets += datain.length; - if (conn->sess->se_sess->se_node_acl) { - spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); - conn->sess->se_sess->se_node_acl->read_bytes += datain.length; - spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); - } - spin_unlock_bh(&conn->sess->session_stats_lock); + atomic_long_add(datain.length, &conn->sess->tx_data_octets); /* * Special case for successfully execution w/ both DATAIN * and Sense Data. @@ -2462,47 +2676,13 @@ 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; @@ -2512,9 +2692,8 @@ static int iscsit_send_data_in( if (conn->conn_ops->HeaderDigest) { u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)header_digest); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu, + ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); iov[0].iov_len += ISCSI_CRC_LEN; tx_size += ISCSI_CRC_LEN; @@ -2523,7 +2702,8 @@ 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; @@ -2554,11 +2734,6 @@ 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); @@ -2581,16 +2756,13 @@ 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 @@ -2659,9 +2831,6 @@ 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; @@ -2673,6 +2842,27 @@ 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; @@ -2680,9 +2870,8 @@ static int iscsit_send_logout_response( if (conn->conn_ops->HeaderDigest) { u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)header_digest); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, &cmd->pdu[0], + ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); iov[0].iov_len += ISCSI_CRC_LEN; tx_size += ISCSI_CRC_LEN; @@ -2692,14 +2881,37 @@ 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. */ @@ -2708,27 +2920,16 @@ 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]; - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)header_digest); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, + ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); tx_size += ISCSI_CRC_LEN; pr_debug("Attaching CRC32C HeaderDigest to" @@ -2757,31 +2958,17 @@ 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; @@ -2789,9 +2976,8 @@ static int iscsit_send_nopin_response( if (conn->conn_ops->HeaderDigest) { u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)header_digest); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, + ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); iov[0].iov_len += ISCSI_CRC_LEN; tx_size += ISCSI_CRC_LEN; @@ -2837,10 +3023,6 @@ 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; } @@ -2884,9 +3066,8 @@ static int iscsit_send_r2t( if (conn->conn_ops->HeaderDigest) { u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)header_digest); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, + ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; tx_size += ISCSI_CRC_LEN; @@ -2925,8 +3106,8 @@ static int iscsit_send_r2t( * connection recovery. */ int iscsit_build_r2ts_for_cmd( - struct iscsi_cmd *cmd, struct iscsi_conn *conn, + struct iscsi_cmd *cmd, bool recovery) { int first_r2t = 1; @@ -3001,24 +3182,14 @@ 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); + atomic_long_inc(&conn->sess->rsp_pdus); - 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; @@ -3038,6 +3209,23 @@ 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; @@ -3091,9 +3279,8 @@ static int iscsit_send_status( if (conn->conn_ops->HeaderDigest) { u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)header_digest); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu, + ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); iov[0].iov_len += ISCSI_CRC_LEN; tx_size += ISCSI_CRC_LEN; @@ -3104,11 +3291,6 @@ 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; } @@ -3123,24 +3305,18 @@ static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) return ISCSI_TMF_RSP_NO_LUN; case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: return ISCSI_TMF_RSP_NOT_SUPPORTED; - case TMR_FUNCTION_AUTHORIZATION_FAILED: - return ISCSI_TMF_RSP_AUTH_FAILED; case TMR_FUNCTION_REJECTED: default: return ISCSI_TMF_RSP_REJECTED; } } -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); @@ -3152,6 +3328,20 @@ 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; @@ -3159,9 +3349,8 @@ static int iscsit_send_task_mgt_rsp( if (conn->conn_ops->HeaderDigest) { u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)header_digest); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, + ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; tx_size += ISCSI_CRC_LEN; @@ -3172,10 +3361,6 @@ 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; } @@ -3205,7 +3390,9 @@ static bool iscsit_check_inaddr_any(struct iscsi_np *np) #define SENDTARGETS_BUF_LIMIT 32768U -static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) +static int +iscsit_build_sendtargets_response(struct iscsi_cmd *cmd, + enum iscsit_transport_type network_transport) { char *payload = NULL; struct iscsi_conn *conn = cmd->conn; @@ -3213,7 +3400,9 @@ static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) struct iscsi_tiqn *tiqn; struct iscsi_tpg_np *tpg_np; int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; + int target_name_printed; unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ + unsigned char *text_in = cmd->text_in_ptr, *text_ptr = NULL; buffer_len = max(conn->conn_ops->MaxRecvDataSegmentLength, SENDTARGETS_BUF_LIMIT); @@ -3224,22 +3413,48 @@ static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) " response.\n"); return -ENOMEM; } + /* + * Locate pointer to iqn./eui. string for IFC_SENDTARGETS_SINGLE + * explicit case.. + */ + if (cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) { + text_ptr = strchr(text_in, '='); + if (!text_ptr) { + pr_err("Unable to locate '=' string in text_in:" + " %s\n", text_in); + kfree(payload); + return -EINVAL; + } + /* + * Skip over '=' character.. + */ + text_ptr += 1; + } spin_lock(&tiqn_lock); list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { - len = sprintf(buf, "TargetName=%s", tiqn->tiqn); - len += 1; - - if ((len + payload_len) > buffer_len) { - end_of_buf = 1; - goto eob; + if ((cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) && + strcmp(tiqn->tiqn, text_ptr)) { + continue; } - memcpy(payload + payload_len, buf, len); - payload_len += len; + + target_name_printed = 0; spin_lock(&tiqn->tiqn_tpg_lock); list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { + /* If demo_mode_discovery=0 and generate_node_acls=0 + * (demo mode dislabed) do not return + * TargetName+TargetAddress unless a NodeACL exists. + */ + + if ((tpg->tpg_attrib.generate_node_acls == 0) && + (tpg->tpg_attrib.demo_mode_discovery == 0) && + (!core_tpg_get_initiator_node_acl(&tpg->tpg_se_tpg, + cmd->conn->sess->sess_ops->InitiatorName))) { + continue; + } + spin_lock(&tpg->tpg_state_lock); if ((tpg->tpg_state == TPG_STATE_FREE) || (tpg->tpg_state == TPG_STATE_INACTIVE)) { @@ -3254,14 +3469,29 @@ static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) struct iscsi_np *np = tpg_np->tpg_np; bool inaddr_any = iscsit_check_inaddr_any(np); + if (np->np_network_transport != network_transport) + continue; + + if (!target_name_printed) { + len = sprintf(buf, "TargetName=%s", + tiqn->tiqn); + len += 1; + + if ((len + payload_len) > buffer_len) { + spin_unlock(&tpg->tpg_np_lock); + spin_unlock(&tiqn->tiqn_tpg_lock); + end_of_buf = 1; + goto eob; + } + memcpy(payload + payload_len, buf, len); + payload_len += len; + target_name_printed = 1; + } + len = sprintf(buf, "TargetAddress=" - "%s%s%s:%hu,%hu", - (np->np_sockaddr.ss_family == AF_INET6) ? - "[" : "", (inaddr_any == false) ? - np->np_ip : conn->local_ip, - (np->np_sockaddr.ss_family == AF_INET6) ? - "]" : "", (inaddr_any == false) ? - np->np_port : conn->local_port, + "%s:%hu,%hu", + inaddr_any ? conn->local_ip : np->np_ip, + inaddr_any ? conn->local_port : np->np_port, tpg->tpgt); len += 1; @@ -3280,6 +3510,9 @@ static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) eob: if (end_of_buf) break; + + if (cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) + break; } spin_unlock(&tiqn_lock); @@ -3288,6 +3521,38 @@ eob: return payload_len; } +int +iscsit_build_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, + struct iscsi_text_rsp *hdr, + enum iscsit_transport_type network_transport) +{ + int text_length, padding; + + text_length = iscsit_build_sendtargets_response(cmd, network_transport); + if (text_length < 0) + return text_length; + + hdr->opcode = ISCSI_OP_TEXT_RSP; + hdr->flags |= ISCSI_FLAG_CMD_FINAL; + padding = ((-text_length) & 3); + hton24(hdr->dlength, text_length); + 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); + + 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 Text Response: ITT: 0x%08x, StatSN: 0x%08x," + " Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn, + text_length, conn->cid); + + return text_length + padding; +} +EXPORT_SYMBOL(iscsit_build_text_rsp); + /* * FIXME: Add support for F_BIT and C_BIT when the length is longer than * MaxRecvDataSegmentLength. @@ -3296,51 +3561,29 @@ static int iscsit_send_text_rsp( struct iscsi_cmd *cmd, struct iscsi_conn *conn) { - struct iscsi_text_rsp *hdr; + struct iscsi_text_rsp *hdr = (struct iscsi_text_rsp *)cmd->pdu; struct kvec *iov; - u32 padding = 0, tx_size = 0; - int text_length, iov_count = 0; - - text_length = iscsit_build_sendtargets_response(cmd); - if (text_length < 0) - return text_length; - - padding = ((-text_length) & 3); - if (padding != 0) { - memset(cmd->buf_ptr + text_length, 0, padding); - pr_debug("Attaching %u additional bytes for" - " padding.\n", padding); - } - - hdr = (struct iscsi_text_rsp *) cmd->pdu; - memset(hdr, 0, ISCSI_HDR_LEN); - hdr->opcode = ISCSI_OP_TEXT_RSP; - hdr->flags |= ISCSI_FLAG_CMD_FINAL; - hton24(hdr->dlength, text_length); - 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 tx_size = 0; + int text_length, iov_count = 0, rc; - 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); + rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_TCP); + if (rc < 0) + return rc; + text_length = rc; 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; - iov[iov_count++].iov_len = text_length + padding; + iov[iov_count++].iov_len = text_length; - tx_size += (ISCSI_HDR_LEN + text_length + padding); + tx_size += (ISCSI_HDR_LEN + text_length); if (conn->conn_ops->HeaderDigest) { u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)header_digest); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, + ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); iov[0].iov_len += ISCSI_CRC_LEN; tx_size += ISCSI_CRC_LEN; @@ -3350,7 +3593,7 @@ static int iscsit_send_text_rsp( if (conn->conn_ops->DataDigest) { iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - cmd->buf_ptr, (text_length + padding), + cmd->buf_ptr, text_length, 0, NULL, (u8 *)&cmd->data_crc); iov[iov_count].iov_base = &cmd->data_crc; @@ -3358,39 +3601,44 @@ static int iscsit_send_text_rsp( tx_size += ISCSI_CRC_LEN; pr_debug("Attaching DataDigest for %u bytes of text" - " data, CRC 0x%08x\n", (text_length + padding), + " data, CRC 0x%08x\n", text_length, cmd->data_crc); } cmd->iov_misc_count = iov_count; cmd->tx_size = tx_size; - pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x," - " Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn, - text_length, conn->cid); return 0; } -static int iscsit_send_reject( - struct iscsi_cmd *cmd, - struct iscsi_conn *conn) +void +iscsit_build_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn, + struct iscsi_reject *hdr) { - u32 iov_count = 0, tx_size = 0; - struct iscsi_reject *hdr; - struct kvec *iov; - - hdr = (struct iscsi_reject *) cmd->pdu; hdr->opcode = ISCSI_OP_REJECT; + hdr->reason = cmd->reject_reason; 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); + hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); + hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); - iov = &cmd->iov_misc[0]; +} +EXPORT_SYMBOL(iscsit_build_reject); + +static int iscsit_send_reject( + struct iscsi_cmd *cmd, + struct iscsi_conn *conn) +{ + struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0]; + struct kvec *iov; + u32 iov_count = 0, tx_size; + + iscsit_build_reject(cmd, conn, hdr); + 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; @@ -3401,9 +3649,8 @@ static int iscsit_send_reject( if (conn->conn_ops->HeaderDigest) { u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)hdr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)header_digest); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, + ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); iov[0].iov_len += ISCSI_CRC_LEN; tx_size += ISCSI_CRC_LEN; @@ -3412,9 +3659,8 @@ static int iscsit_send_reject( } if (conn->conn_ops->DataDigest) { - iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, - (unsigned char *)cmd->buf_ptr, ISCSI_HDR_LEN, - 0, NULL, (u8 *)&cmd->data_crc); + iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->buf_ptr, + ISCSI_HDR_LEN, 0, NULL, (u8 *)&cmd->data_crc); iov[iov_count].iov_base = &cmd->data_crc; iov[iov_count++].iov_len = ISCSI_CRC_LEN; @@ -3487,55 +3733,41 @@ 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_init(&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, false); + 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; @@ -3544,123 +3776,135 @@ 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); - 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; - } + ret = t->iscsit_immediate_queue(conn, cmd, state); + if (ret < 0) + return ret; + } - 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; - } + return 0; +} + +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); - 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; - } - 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; + state = ISTATE_SEND_STATUS; + goto check_rsp_state; } - if (atomic_read(&conn->check_immediate_queue)) + 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; + 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: + case ISTATE_SEND_REJECT: + spin_lock_bh(&cmd->istate_lock); + cmd->i_state = ISTATE_SENT_STATUS; + spin_unlock_bh(&cmd->istate_lock); + 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; @@ -3670,6 +3914,27 @@ 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; @@ -3703,12 +3968,15 @@ restart: signal_pending(current)) goto transport_err; - ret = handle_immediate_queue(conn); +get_immediate: + ret = iscsit_handle_immediate_queue(conn); if (ret < 0) goto transport_err; - ret = handle_response_queue(conn); - if (ret == -EAGAIN) + ret = iscsit_handle_response_queue(conn); + if (ret == 1) + goto get_immediate; + else if (ret == -EAGAIN) goto restart; else if (ret < 0) goto transport_err; @@ -3721,6 +3989,85 @@ out: return 0; } +static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf) +{ + struct iscsi_hdr *hdr = (struct iscsi_hdr *)buf; + struct iscsi_cmd *cmd; + int ret = 0; + + switch (hdr->opcode & ISCSI_OPCODE_MASK) { + case ISCSI_OP_SCSI_CMD: + cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); + if (!cmd) + goto reject; + + ret = iscsit_handle_scsi_cmd(conn, cmd, buf); + break; + case ISCSI_OP_SCSI_DATA_OUT: + ret = iscsit_handle_data_out(conn, buf); + break; + case ISCSI_OP_NOOP_OUT: + cmd = NULL; + if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { + cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); + if (!cmd) + goto reject; + } + ret = iscsit_handle_nop_out(conn, cmd, buf); + break; + case ISCSI_OP_SCSI_TMFUNC: + cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); + if (!cmd) + goto reject; + + ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf); + break; + case ISCSI_OP_TEXT: + cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); + if (!cmd) + goto reject; + + ret = iscsit_handle_text_cmd(conn, cmd, buf); + break; + case ISCSI_OP_LOGOUT: + cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); + if (!cmd) + goto reject; + + ret = iscsit_handle_logout_cmd(conn, cmd, buf); + if (ret > 0) + wait_for_completion_timeout(&conn->conn_logout_comp, + SECONDS_FOR_LOGOUT_COMP * HZ); + break; + case ISCSI_OP_SNACK: + ret = iscsit_handle_snack(conn, buf); + break; + default: + pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr->opcode); + if (!conn->sess->sess_ops->ErrorRecoveryLevel) { + pr_err("Cannot recover from unknown" + " opcode while ERL=0, closing iSCSI connection.\n"); + return -1; + } + if (!conn->conn_ops->OFMarker) { + pr_err("Unable to recover from unknown" + " opcode while OFMarker=No, closing iSCSI" + " connection.\n"); + return -1; + } + if (iscsit_recover_from_unknown_opcode(conn) < 0) { + pr_err("Unable to recover from unknown" + " opcode, closing iSCSI connection.\n"); + return -1; + } + break; + } + + return ret; +reject: + return iscsit_add_reject(conn, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); +} + int iscsi_target_rx_thread(void *arg) { int ret; @@ -3740,6 +4087,18 @@ restart: if (!conn) goto out; + if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) { + struct completion comp; + int rc; + + init_completion(&comp); + rc = wait_for_completion_interruptible(&comp); + if (rc < 0) + goto transport_err; + + goto out; + } + while (!kthread_should_stop()) { /* * Ensure that both TX and RX per connection kthreads @@ -3759,11 +4118,6 @@ restart: goto transport_err; } - /* - * Set conn->bad_hdr for use with REJECT PDUs. - */ - memcpy(&conn->bad_hdr, &buffer, ISCSI_HDR_LEN); - if (conn->conn_ops->HeaderDigest) { iov.iov_base = &digest; iov.iov_len = ISCSI_CRC_LEN; @@ -3787,9 +4141,7 @@ restart: * hit default in the switch below. */ memset(buffer, 0xff, ISCSI_HDR_LEN); - spin_lock_bh(&conn->sess->session_stats_lock); - conn->sess->conn_digest_errors++; - spin_unlock_bh(&conn->sess->session_stats_lock); + atomic_long_inc(&conn->sess->conn_digest_errors); } else { pr_debug("Got HeaderDigest CRC32C" " 0x%08x\n", checksum); @@ -3806,67 +4158,14 @@ restart: (!(opcode & ISCSI_OP_LOGOUT)))) { pr_err("Received illegal iSCSI Opcode: 0x%02x" " while in Discovery Session, rejecting.\n", opcode); - iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, - buffer, conn); + iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, + buffer); goto transport_err; } - switch (opcode) { - case ISCSI_OP_SCSI_CMD: - if (iscsit_handle_scsi_cmd(conn, buffer) < 0) - goto transport_err; - break; - case ISCSI_OP_SCSI_DATA_OUT: - if (iscsit_handle_data_out(conn, buffer) < 0) - goto transport_err; - break; - case ISCSI_OP_NOOP_OUT: - if (iscsit_handle_nop_out(conn, buffer) < 0) - goto transport_err; - break; - case ISCSI_OP_SCSI_TMFUNC: - if (iscsit_handle_task_mgt_cmd(conn, buffer) < 0) - goto transport_err; - break; - case ISCSI_OP_TEXT: - if (iscsit_handle_text_cmd(conn, buffer) < 0) - goto transport_err; - break; - case ISCSI_OP_LOGOUT: - ret = iscsit_handle_logout_cmd(conn, buffer); - if (ret > 0) { - wait_for_completion_timeout(&conn->conn_logout_comp, - SECONDS_FOR_LOGOUT_COMP * HZ); - goto transport_err; - } else if (ret < 0) - goto transport_err; - break; - case ISCSI_OP_SNACK: - if (iscsit_handle_snack(conn, buffer) < 0) - goto transport_err; - break; - default: - pr_err("Got unknown iSCSI OpCode: 0x%02x\n", - opcode); - if (!conn->sess->sess_ops->ErrorRecoveryLevel) { - pr_err("Cannot recover from unknown" - " opcode while ERL=0, closing iSCSI connection" - ".\n"); - goto transport_err; - } - if (!conn->conn_ops->OFMarker) { - pr_err("Unable to recover from unknown" - " opcode while OFMarker=No, closing iSCSI" - " connection.\n"); - goto transport_err; - } - if (iscsit_recover_from_unknown_opcode(conn) < 0) { - pr_err("Unable to recover from unknown" - " opcode, closing iSCSI connection.\n"); - goto transport_err; - } - break; - } + ret = iscsi_target_rx_opcode(conn, buffer); + if (ret < 0) + goto transport_err; } transport_err: @@ -3890,12 +4189,12 @@ static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) spin_lock_bh(&conn->cmd_lock); list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_conn_node) { - list_del(&cmd->i_conn_node); + list_del_init(&cmd->i_conn_node); spin_unlock_bh(&conn->cmd_lock); iscsit_increment_maxcmdsn(cmd, sess); - iscsit_free_cmd(cmd); + iscsit_free_cmd(cmd, true); spin_lock_bh(&conn->cmd_lock); } @@ -3935,7 +4234,9 @@ int iscsit_close_connection( iscsit_stop_timers_for_cmds(conn); iscsit_stop_nopin_response_timer(conn); iscsit_stop_nopin_timer(conn); - iscsit_free_queue_reqs_for_conn(conn); + + if (conn->conn_transport->iscsit_wait_conn) + conn->conn_transport->iscsit_wait_conn(conn); /* * During Connection recovery drop unacknowledged out of order @@ -3953,6 +4254,7 @@ int iscsit_close_connection( iscsit_clear_ooo_cmdsns_for_conn(conn); iscsit_release_commands_from_conn(conn); } + iscsit_free_queue_reqs_for_conn(conn); /* * Handle decrementing session or connection usage count if @@ -4032,6 +4334,12 @@ int iscsit_close_connection( if (conn->sock) sock_release(conn->sock); + + if (conn->conn_transport->iscsit_free_conn) + conn->conn_transport->iscsit_free_conn(conn); + + iscsit_put_transport(conn->conn_transport); + conn->thread_set = NULL; pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); @@ -4123,7 +4431,7 @@ int iscsit_close_connection( int iscsit_close_session(struct iscsi_session *sess) { - struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess); + struct iscsi_portal_group *tpg = sess->tpg; struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; if (atomic_read(&sess->nconn)) { @@ -4263,7 +4571,7 @@ 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) { @@ -4321,6 +4629,7 @@ static int iscsit_logout_post_handler( } return ret; } +EXPORT_SYMBOL(iscsit_logout_post_handler); void iscsit_fail_session(struct iscsi_session *sess) { |