/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include #include #include #include #include #include #include #include #include static volatile uint64_t smb_kids; uint32_t smb_keep_alive = SSN_KEEP_ALIVE_TIMEOUT; static int smb_session_message(smb_session_t *); static int smb_session_xprt_puthdr(smb_session_t *, smb_xprt_t *, uint8_t *, size_t); static smb_user_t *smb_session_lookup_user(smb_session_t *, char *, char *); static void smb_request_init_command_mbuf(smb_request_t *sr); void smb_session_timers(smb_session_list_t *se) { smb_session_t *session; rw_enter(&se->se_lock, RW_READER); session = list_head(&se->se_act.lst); while (session) { /* * Walk through the table and decrement each keep_alive * timer that has not timed out yet. (keepalive > 0) */ ASSERT(session->s_magic == SMB_SESSION_MAGIC); if (session->keep_alive && (session->keep_alive != (uint32_t)-1)) session->keep_alive--; session = list_next(&se->se_act.lst, session); } rw_exit(&se->se_lock); } void smb_session_correct_keep_alive_values( smb_session_list_t *se, uint32_t new_keep_alive) { smb_session_t *sn; if (new_keep_alive == smb_keep_alive) return; /* * keep alive == 0 means do not drop connection if it's idle */ smb_keep_alive = (new_keep_alive) ? new_keep_alive : -1; /* * Walk through the table and set each session to the new keep_alive * value if they have not already timed out. Block clock interrupts. */ rw_enter(&se->se_lock, RW_READER); sn = list_head(&se->se_rdy.lst); while (sn) { ASSERT(sn->s_magic == SMB_SESSION_MAGIC); sn->keep_alive = new_keep_alive; sn = list_next(&se->se_rdy.lst, sn); } sn = list_head(&se->se_act.lst); while (sn) { ASSERT(sn->s_magic == SMB_SESSION_MAGIC); if (sn->keep_alive) sn->keep_alive = new_keep_alive; sn = list_next(&se->se_act.lst, sn); } rw_exit(&se->se_lock); } /* * smb_reconnection_check * * This function is called when a client indicates its current connection * should be the only one it has with the server, as indicated by VC=0 in * a SessionSetupX request. We go through the session list and destroy any * stale connections for that client. * * Clients don't associate IP addresses and servers. So a client may make * independent connections (i.e. with VC=0) to a server with multiple * IP addresses. So, when checking for a reconnection, we need to include * the local IP address, to which the client is connecting, when checking * for stale sessions. * * Also check the server's NetBIOS name to support simultaneous access by * multiple clients behind a NAT server. This will only work for SMB over * NetBIOS on TCP port 139, it will not work SMB over TCP port 445 because * there is no NetBIOS name. See also Knowledge Base article Q301673. */ void smb_session_reconnection_check(smb_session_list_t *se, smb_session_t *session) { smb_session_t *sn; rw_enter(&se->se_lock, RW_READER); sn = list_head(&se->se_act.lst); while (sn) { ASSERT(sn->s_magic == SMB_SESSION_MAGIC); if ((sn != session) && (sn->ipaddr == session->ipaddr) && (sn->local_ipaddr == session->local_ipaddr) && (strcasecmp(sn->workstation, session->workstation) == 0) && (sn->opentime <= session->opentime) && (sn->s_kid < session->s_kid)) { tsignal(sn->s_thread, SIGINT); } sn = list_next(&se->se_act.lst, sn); } rw_exit(&se->se_lock); } /* * Send a session message - supports SMB-over-NBT and SMB-over-TCP. * * The mbuf chain is copied into a contiguous buffer so that the whole * message is submitted to smb_sosend as a single request. This should * help Ethereal/Wireshark delineate the packets correctly even though * TCP_NODELAY has been set on the socket. * * If an mbuf chain is provided, it will be freed and set to NULL here. */ int smb_session_send(smb_session_t *session, uint8_t type, mbuf_chain_t *mbc) { smb_txreq_t *txr; smb_xprt_t hdr; int rc; switch (session->s_state) { case SMB_SESSION_STATE_DISCONNECTED: case SMB_SESSION_STATE_TERMINATED: if ((mbc != NULL) && (mbc->chain != NULL)) { m_freem(mbc->chain); mbc->chain = NULL; mbc->flags = 0; } return (ENOTCONN); default: break; } txr = smb_net_txr_alloc(); if ((mbc != NULL) && (mbc->chain != NULL)) { rc = mbc_moveout(mbc, (caddr_t)&txr->tr_buf[NETBIOS_HDR_SZ], sizeof (txr->tr_buf) - NETBIOS_HDR_SZ, &txr->tr_len); if (rc != 0) { smb_net_txr_free(txr); return (rc); } } hdr.xh_type = type; hdr.xh_length = (uint32_t)txr->tr_len; rc = smb_session_xprt_puthdr(session, &hdr, txr->tr_buf, NETBIOS_HDR_SZ); if (rc != 0) { smb_net_txr_free(txr); return (rc); } txr->tr_len += NETBIOS_HDR_SZ; return (smb_net_txr_send(session->sock, &session->s_txlst, txr)); } /* * Read, process and respond to a NetBIOS session request. * * A NetBIOS session must be established for SMB-over-NetBIOS. Validate * the calling and called name format and save the client NetBIOS name, * which is used when a NetBIOS session is established to check for and * cleanup leftover state from a previous session. * * Session requests are not valid for SMB-over-TCP, which is unfortunate * because without the client name leftover state cannot be cleaned up * if the client is behind a NAT server. */ static int smb_session_request(struct smb_session *session) { int rc; char *calling_name; char *called_name; char client_name[NETBIOS_NAME_SZ]; struct mbuf_chain mbc; char *names = NULL; mts_wchar_t *wbuf = NULL; smb_xprt_t hdr; char *p; unsigned int cpid = oem_get_smb_cpid(); int rc1, rc2; session->keep_alive = smb_keep_alive; if ((rc = smb_session_xprt_gethdr(session, &hdr)) != 0) return (rc); DTRACE_PROBE2(receive__session__req__xprthdr, struct session *, session, smb_xprt_t *, &hdr); if ((hdr.xh_type != SESSION_REQUEST) || (hdr.xh_length != NETBIOS_SESSION_REQUEST_DATA_LENGTH)) { DTRACE_PROBE1(receive__session__req__failed, struct session *, session); return (EINVAL); } names = kmem_alloc(hdr.xh_length, KM_SLEEP); if ((rc = smb_sorecv(session->sock, names, hdr.xh_length)) != 0) { kmem_free(names, hdr.xh_length); DTRACE_PROBE1(receive__session__req__failed, struct session *, session); return (rc); } DTRACE_PROBE3(receive__session__req__data, struct session *, session, char *, names, uint32_t, hdr.xh_length); called_name = &names[0]; calling_name = &names[NETBIOS_ENCODED_NAME_SZ + 2]; rc1 = netbios_name_isvalid(called_name, 0); rc2 = netbios_name_isvalid(calling_name, client_name); if (rc1 == 0 || rc2 == 0) { DTRACE_PROBE3(receive__invalid__session__req, struct session *, session, char *, names, uint32_t, hdr.xh_length); kmem_free(names, hdr.xh_length); MBC_INIT(&mbc, MAX_DATAGRAM_LENGTH); (void) smb_mbc_encodef(&mbc, "b", DATAGRAM_INVALID_SOURCE_NAME_FORMAT); (void) smb_session_send(session, NEGATIVE_SESSION_RESPONSE, &mbc); return (EINVAL); } DTRACE_PROBE3(receive__session__req__calling__decoded, struct session *, session, char *, calling_name, char *, client_name); /* * The client NetBIOS name is in oem codepage format. * We need to convert it to unicode and store it in * multi-byte format. We also need to strip off any * spaces added as part of the NetBIOS name encoding. */ wbuf = kmem_alloc((SMB_PI_MAX_HOST * sizeof (mts_wchar_t)), KM_SLEEP); (void) oemstounicodes(wbuf, client_name, SMB_PI_MAX_HOST, cpid); (void) mts_wcstombs(session->workstation, wbuf, SMB_PI_MAX_HOST); kmem_free(wbuf, (SMB_PI_MAX_HOST * sizeof (mts_wchar_t))); if ((p = strchr(session->workstation, ' ')) != 0) *p = '\0'; kmem_free(names, hdr.xh_length); return (smb_session_send(session, POSITIVE_SESSION_RESPONSE, NULL)); } /* * Read 4-byte header from the session socket and build an in-memory * session transport header. See smb_xprt_t definition for header * format information. * * Direct hosted NetBIOS-less SMB (SMB-over-TCP) uses port 445. The * first byte of the four-byte header must be 0 and the next three * bytes contain the length of the remaining data. */ int smb_session_xprt_gethdr(smb_session_t *session, smb_xprt_t *ret_hdr) { int rc; unsigned char buf[NETBIOS_HDR_SZ]; if ((rc = smb_sorecv(session->sock, buf, NETBIOS_HDR_SZ)) != 0) return (rc); switch (session->s_local_port) { case SSN_SRVC_TCP_PORT: ret_hdr->xh_type = buf[0]; ret_hdr->xh_length = (((uint32_t)buf[1] & 1) << 16) | ((uint32_t)buf[2] << 8) | ((uint32_t)buf[3]); break; case SMB_SRVC_TCP_PORT: ret_hdr->xh_type = buf[0]; if (ret_hdr->xh_type != 0) { cmn_err(CE_WARN, "0x%08x: invalid type (%u)", session->ipaddr, ret_hdr->xh_type); return (EPROTO); } ret_hdr->xh_length = ((uint32_t)buf[1] << 16) | ((uint32_t)buf[2] << 8) | ((uint32_t)buf[3]); break; default: cmn_err(CE_WARN, "0x%08x: invalid port %u", session->ipaddr, session->s_local_port); return (EPROTO); } return (0); } /* * Encode a transport session packet header into a 4-byte buffer. * See smb_xprt_t definition for header format information. */ static int smb_session_xprt_puthdr(smb_session_t *session, smb_xprt_t *hdr, uint8_t *buf, size_t buflen) { if (session == NULL || hdr == NULL || buf == NULL || buflen < NETBIOS_HDR_SZ) { return (-1); } switch (session->s_local_port) { case SSN_SRVC_TCP_PORT: buf[0] = hdr->xh_type; buf[1] = ((hdr->xh_length >> 16) & 1); buf[2] = (hdr->xh_length >> 8) & 0xff; buf[3] = hdr->xh_length & 0xff; break; case SMB_SRVC_TCP_PORT: buf[0] = hdr->xh_type; buf[1] = (hdr->xh_length >> 16) & 0xff; buf[2] = (hdr->xh_length >> 8) & 0xff; buf[3] = hdr->xh_length & 0xff; break; default: cmn_err(CE_WARN, "0x%08x: invalid port (%u)", session->ipaddr, session->s_local_port); return (-1); } return (0); } static void smb_request_init_command_mbuf(smb_request_t *sr) { MGET(sr->command.chain, 0, MT_DATA); /* * Setup mbuf, mimic MCLGET but use the complete packet buffer. */ sr->command.chain->m_ext.ext_buf = sr->sr_request_buf; sr->command.chain->m_data = sr->command.chain->m_ext.ext_buf; sr->command.chain->m_len = sr->sr_req_length; sr->command.chain->m_flags |= M_EXT; sr->command.chain->m_ext.ext_size = sr->sr_req_length; sr->command.chain->m_ext.ext_ref = &mclrefnoop; /* * Initialize the rest of the mbuf_chain fields */ sr->command.flags = 0; sr->command.shadow_of = 0; sr->command.max_bytes = sr->sr_req_length; sr->command.chain_offset = 0; } /* * smb_request_cancel * * Handle a cancel for a request properly depending on the current request * state. */ void smb_request_cancel(smb_request_t *sr) { mutex_enter(&sr->sr_mutex); switch (sr->sr_state) { case SMB_REQ_STATE_SUBMITTED: case SMB_REQ_STATE_ACTIVE: case SMB_REQ_STATE_CLEANED_UP: sr->sr_state = SMB_REQ_STATE_CANCELED; break; case SMB_REQ_STATE_WAITING_LOCK: /* * This request is waiting on a lock. Wakeup everything * waiting on the lock so that the relevant thread regains * control and notices that is has been canceled. The * other lock request threads waiting on this lock will go * back to sleep when they discover they are still blocked. */ sr->sr_state = SMB_REQ_STATE_CANCELED; ASSERT(sr->sr_awaiting != NULL); mutex_enter(&sr->sr_awaiting->l_mutex); cv_broadcast(&sr->sr_awaiting->l_cv); mutex_exit(&sr->sr_awaiting->l_mutex); break; case SMB_REQ_STATE_WAITING_EVENT: case SMB_REQ_STATE_EVENT_OCCURRED: /* * Cancellations for these states are handled by the * notify-change code */ break; case SMB_REQ_STATE_COMPLETED: case SMB_REQ_STATE_CANCELED: /* * No action required for these states since the request * is completing. */ break; /* * Cases included: * SMB_REQ_STATE_FREE: * SMB_REQ_STATE_INITIALIZING: */ default: ASSERT(0); break; } mutex_exit(&sr->sr_mutex); } /* * This is the entry point for processing SMB messages over NetBIOS or * SMB-over-TCP. * * NetBIOS connections require a session request to establish a session * on which to send session messages. * * Session requests are not valid on SMB-over-TCP. We don't need to do * anything here as session requests will be treated as an error when * handling session messages. */ int smb_session_daemon(smb_session_list_t *se) { int rc = 0; smb_session_t *session; session = smb_session_list_activate_head(se); if (session == NULL) return (EINVAL); if (session->s_local_port == SSN_SRVC_TCP_PORT) { rc = smb_session_request(session); if (rc) { smb_rwx_rwenter(&session->s_lock, RW_WRITER); session->s_state = SMB_SESSION_STATE_DISCONNECTED; smb_rwx_rwexit(&session->s_lock); smb_session_list_terminate(se, session); return (rc); } } smb_rwx_rwenter(&session->s_lock, RW_WRITER); session->s_state = SMB_SESSION_STATE_ESTABLISHED; smb_rwx_rwexit(&session->s_lock); rc = smb_session_message(session); smb_rwx_rwenter(&session->s_lock, RW_WRITER); session->s_state = SMB_SESSION_STATE_DISCONNECTED; smb_rwx_rwexit(&session->s_lock); smb_soshutdown(session->sock); DTRACE_PROBE2(session__drop, struct session *, session, int, rc); smb_session_cancel(session); /* * At this point everything related to the session should have been * cleaned up and we expect that nothing will attempt to use the * socket. */ smb_session_list_terminate(se, session); return (rc); } /* * Read and process SMB requests. * * Returns: * 0 Success * 1 Unable to read transport header * 2 Invalid transport header type * 3 Invalid SMB length (too small) * 4 Unable to read SMB header * 5 Invalid SMB header (bad magic number) * 6 Unable to read SMB data * 2x Write raw failed */ static int smb_session_message(smb_session_t *session) { smb_request_t *sr = NULL; smb_xprt_t hdr; uint8_t *req_buf; uint32_t resid; int rc; for (;;) { rc = smb_session_xprt_gethdr(session, &hdr); if (rc) return (rc); DTRACE_PROBE2(session__receive__xprthdr, session_t *, session, smb_xprt_t *, &hdr); if (hdr.xh_type != SESSION_MESSAGE) { /* * Anything other than SESSION_MESSAGE or * SESSION_KEEP_ALIVE is an error. A SESSION_REQUEST * may indicate a new session request but we need to * close this session and we can treat it as an error * here. */ if (hdr.xh_type == SESSION_KEEP_ALIVE) { session->keep_alive = smb_keep_alive; continue; } return (EPROTO); } if (hdr.xh_length < SMB_HEADER_LEN) return (EPROTO); session->keep_alive = smb_keep_alive; /* * Allocate a request context, read the SMB header and validate * it. The sr includes a buffer large enough to hold the SMB * request payload. If the header looks valid, read any * remaining data. */ sr = smb_request_alloc(session, hdr.xh_length); req_buf = (uint8_t *)sr->sr_request_buf; resid = hdr.xh_length; rc = smb_sorecv(session->sock, req_buf, SMB_HEADER_LEN); if (rc) { smb_request_free(sr); return (rc); } if (SMB_PROTOCOL_MAGIC_INVALID(sr)) { smb_request_free(sr); return (EPROTO); } if (resid > SMB_HEADER_LEN) { req_buf += SMB_HEADER_LEN; resid -= SMB_HEADER_LEN; rc = smb_sorecv(session->sock, req_buf, resid); if (rc) { smb_request_free(sr); return (rc); } } /* * Initialize command MBC to represent the received data. */ smb_request_init_command_mbuf(sr); DTRACE_PROBE1(session__receive__smb, smb_request_t *, sr); /* * If this is a raw write, hand off the request. The handler * will retrieve the remaining raw data and process the request. */ if (SMB_IS_WRITERAW(sr)) { rc = smb_handle_write_raw(session, sr); /* XXX smb_request_free(sr); ??? */ return (rc); } sr->sr_state = SMB_REQ_STATE_SUBMITTED; (void) taskq_dispatch(session->s_server->sv_thread_pool, smb_session_worker, sr, TQ_SLEEP); } } /* * Port will be SSN_SRVC_TCP_PORT or SMB_SRVC_TCP_PORT. */ smb_session_t * smb_session_create(struct sonode *new_so, uint16_t port, smb_server_t *sv) { uint32_t ipaddr; uint32_t local_ipaddr; struct sockaddr_in sin; smb_session_t *session; session = kmem_cache_alloc(sv->si_cache_session, KM_SLEEP); bzero(session, sizeof (smb_session_t)); if (smb_idpool_constructor(&session->s_uid_pool)) { kmem_cache_free(sv->si_cache_session, session); return (NULL); } session->s_kid = SMB_NEW_KID(); session->s_state = SMB_SESSION_STATE_INITIALIZED; session->native_os = NATIVE_OS_UNKNOWN; session->opentime = lbolt64; session->keep_alive = smb_keep_alive; session->activity_timestamp = lbolt64; smb_slist_constructor(&session->s_req_list, sizeof (smb_request_t), offsetof(smb_request_t, sr_session_lnd)); smb_llist_constructor(&session->s_user_list, sizeof (smb_user_t), offsetof(smb_user_t, u_lnd)); smb_llist_constructor(&session->s_xa_list, sizeof (smb_xa_t), offsetof(smb_xa_t, xa_lnd)); smb_net_txl_constructor(&session->s_txlst); smb_rwx_init(&session->s_lock); if (new_so) { bcopy(new_so->so_faddr_sa, &sin, new_so->so_faddr_len); ipaddr = sin.sin_addr.s_addr; bcopy(new_so->so_laddr_sa, &sin, new_so->so_faddr_len); local_ipaddr = sin.sin_addr.s_addr; session->s_local_port = port; session->ipaddr = ipaddr; session->local_ipaddr = local_ipaddr; session->sock = new_so; } session->s_server = sv; smb_server_get_cfg(sv, &session->s_cfg); session->s_cache_request = sv->si_cache_request; session->s_cache = sv->si_cache_session; session->s_magic = SMB_SESSION_MAGIC; return (session); } void smb_session_delete(smb_session_t *session) { ASSERT(session->s_magic == SMB_SESSION_MAGIC); session->s_magic = (uint32_t)~SMB_SESSION_MAGIC; smb_rwx_destroy(&session->s_lock); smb_net_txl_destructor(&session->s_txlst); smb_slist_destructor(&session->s_req_list); smb_llist_destructor(&session->s_user_list); smb_llist_destructor(&session->s_xa_list); ASSERT(session->s_tree_cnt == 0); ASSERT(session->s_file_cnt == 0); ASSERT(session->s_dir_cnt == 0); smb_idpool_destructor(&session->s_uid_pool); kmem_cache_free(session->s_cache, session); } void smb_session_cancel(smb_session_t *session) { smb_xa_t *xa, *nextxa; /* All the request currently being treated must be canceled. */ smb_session_cancel_requests(session, NULL, NULL); /* * We wait for the completion of all the requests associated with * this session. */ smb_slist_wait_for_empty(&session->s_req_list); /* * At this point the reference count of the users, trees, files, * directories should be zero. It should be possible to destroy them * without any problem. */ xa = smb_llist_head(&session->s_xa_list); while (xa) { nextxa = smb_llist_next(&session->s_xa_list, xa); smb_xa_close(xa); xa = nextxa; } smb_user_logoff_all(session); } /* * Cancel requests. If a non-null tree is specified, only requests specific * to that tree will be cancelled. If a non-null sr is specified, that sr * will be not be cancelled - this would typically be the caller's sr. */ void smb_session_cancel_requests( smb_session_t *session, smb_tree_t *tree, smb_request_t *exclude_sr) { smb_request_t *sr; smb_process_session_notify_change_queue(session, tree); smb_slist_enter(&session->s_req_list); sr = smb_slist_head(&session->s_req_list); while (sr) { ASSERT(sr->sr_magic == SMB_REQ_MAGIC); if ((sr != exclude_sr) && (tree == NULL || sr->tid_tree == tree)) smb_request_cancel(sr); sr = smb_slist_next(&session->s_req_list, sr); } smb_slist_exit(&session->s_req_list); } void smb_session_worker( void *arg) { smb_request_t *sr; sr = (smb_request_t *)arg; ASSERT(sr->sr_magic == SMB_REQ_MAGIC); mutex_enter(&sr->sr_mutex); switch (sr->sr_state) { case SMB_REQ_STATE_SUBMITTED: mutex_exit(&sr->sr_mutex); smb_dispatch_request(sr); mutex_enter(&sr->sr_mutex); if (!sr->sr_keep) { sr->sr_state = SMB_REQ_STATE_COMPLETED; mutex_exit(&sr->sr_mutex); smb_request_free(sr); break; } mutex_exit(&sr->sr_mutex); break; default: ASSERT(sr->sr_state == SMB_REQ_STATE_CANCELED); sr->sr_state = SMB_REQ_STATE_COMPLETED; mutex_exit(&sr->sr_mutex); smb_request_free(sr); break; } } /* * smb_session_disconnect_share * * Disconnects the specified share. This function should be called after the * share passed in has been made unavailable by the "share manager". */ void smb_session_disconnect_share(smb_session_list_t *se, char *sharename) { smb_session_t *session; rw_enter(&se->se_lock, RW_READER); session = list_head(&se->se_act.lst); while (session) { ASSERT(session->s_magic == SMB_SESSION_MAGIC); smb_rwx_rwenter(&session->s_lock, RW_READER); switch (session->s_state) { case SMB_SESSION_STATE_NEGOTIATED: case SMB_SESSION_STATE_OPLOCK_BREAKING: case SMB_SESSION_STATE_WRITE_RAW_ACTIVE: { smb_user_t *user; smb_user_t *next; user = smb_user_lookup_by_state(session, NULL); while (user) { smb_user_disconnect_share(user, sharename); next = smb_user_lookup_by_state(session, user); smb_user_release(user); user = next; } break; } default: break; } smb_rwx_rwexit(&session->s_lock); session = list_next(&se->se_act.lst, session); } rw_exit(&se->se_lock); } void smb_session_list_constructor(smb_session_list_t *se) { bzero(se, sizeof (*se)); rw_init(&se->se_lock, NULL, RW_DEFAULT, NULL); list_create(&se->se_rdy.lst, sizeof (smb_session_t), offsetof(smb_session_t, s_lnd)); list_create(&se->se_act.lst, sizeof (smb_session_t), offsetof(smb_session_t, s_lnd)); } void smb_session_list_destructor(smb_session_list_t *se) { list_destroy(&se->se_rdy.lst); list_destroy(&se->se_act.lst); rw_destroy(&se->se_lock); } void smb_session_list_append(smb_session_list_t *se, smb_session_t *session) { ASSERT(session->s_magic == SMB_SESSION_MAGIC); ASSERT(session->s_state == SMB_SESSION_STATE_INITIALIZED); rw_enter(&se->se_lock, RW_WRITER); list_insert_tail(&se->se_rdy.lst, session); se->se_rdy.count++; se->se_wrop++; rw_exit(&se->se_lock); } void smb_session_list_delete_tail(smb_session_list_t *se) { smb_session_t *session; rw_enter(&se->se_lock, RW_WRITER); session = list_tail(&se->se_rdy.lst); if (session) { ASSERT(session->s_magic == SMB_SESSION_MAGIC); ASSERT(session->s_state == SMB_SESSION_STATE_INITIALIZED); list_remove(&se->se_rdy.lst, session); ASSERT(se->se_rdy.count); se->se_rdy.count--; rw_exit(&se->se_lock); smb_session_delete(session); return; } rw_exit(&se->se_lock); } smb_session_t * smb_session_list_activate_head(smb_session_list_t *se) { smb_session_t *session; rw_enter(&se->se_lock, RW_WRITER); session = list_head(&se->se_rdy.lst); if (session) { ASSERT(session->s_magic == SMB_SESSION_MAGIC); smb_rwx_rwenter(&session->s_lock, RW_WRITER); ASSERT(session->s_state == SMB_SESSION_STATE_INITIALIZED); session->s_thread = curthread; session->s_ktdid = session->s_thread->t_did; smb_rwx_rwexit(&session->s_lock); list_remove(&se->se_rdy.lst, session); se->se_rdy.count--; list_insert_tail(&se->se_act.lst, session); se->se_act.count++; se->se_wrop++; } rw_exit(&se->se_lock); return (session); } void smb_session_list_terminate(smb_session_list_t *se, smb_session_t *session) { ASSERT(session->s_magic == SMB_SESSION_MAGIC); rw_enter(&se->se_lock, RW_WRITER); smb_rwx_rwenter(&session->s_lock, RW_WRITER); ASSERT(session->s_state == SMB_SESSION_STATE_DISCONNECTED); session->s_state = SMB_SESSION_STATE_TERMINATED; smb_sodestroy(session->sock); session->sock = NULL; smb_rwx_rwexit(&session->s_lock); list_remove(&se->se_act.lst, session); se->se_act.count--; se->se_wrop++; ASSERT(session->s_thread == curthread); rw_exit(&se->se_lock); smb_session_delete(session); } /* * smb_session_list_signal * * This function signals all the session threads. The intent is to terminate * them. The sessions still in the SMB_SESSION_STATE_INITIALIZED are delete * immediately. * * This function must only be called by the threads listening and accepting * connections. They must pass in their respective session list. */ void smb_session_list_signal(smb_session_list_t *se) { smb_session_t *session; rw_enter(&se->se_lock, RW_WRITER); while (session = list_head(&se->se_rdy.lst)) { ASSERT(session->s_magic == SMB_SESSION_MAGIC); smb_rwx_rwenter(&session->s_lock, RW_WRITER); ASSERT(session->s_state == SMB_SESSION_STATE_INITIALIZED); session->s_state = SMB_SESSION_STATE_TERMINATED; smb_sodestroy(session->sock); session->sock = NULL; smb_rwx_rwexit(&session->s_lock); list_remove(&se->se_rdy.lst, session); se->se_rdy.count--; se->se_wrop++; rw_exit(&se->se_lock); smb_session_delete(session); rw_enter(&se->se_lock, RW_WRITER); } rw_downgrade(&se->se_lock); session = list_head(&se->se_act.lst); while (session) { ASSERT(session->s_magic == SMB_SESSION_MAGIC); tsignal(session->s_thread, SIGINT); session = list_next(&se->se_act.lst, session); } rw_exit(&se->se_lock); } /* * smb_session_lookup_user */ static smb_user_t * smb_session_lookup_user(smb_session_t *session, char *domain, char *name) { smb_user_t *user; smb_llist_t *ulist; ulist = &session->s_user_list; smb_llist_enter(ulist, RW_READER); user = smb_llist_head(ulist); while (user) { ASSERT(user->u_magic == SMB_USER_MAGIC); if (!utf8_strcasecmp(user->u_name, name) && !utf8_strcasecmp(user->u_domain, domain)) { mutex_enter(&user->u_mutex); if (user->u_state == SMB_USER_STATE_LOGGED_IN) { user->u_refcnt++; mutex_exit(&user->u_mutex); break; } mutex_exit(&user->u_mutex); } user = smb_llist_next(ulist, user); } smb_llist_exit(ulist); return (user); } /* * If a user attempts to log in subsequently from the specified session, * duplicates the existing SMB user instance such that all SMB user * instances that corresponds to the same user on the given session * reference the same user's cred. * * Returns NULL if the given user hasn't yet logged in from this * specified session. Otherwise, returns a user instance that corresponds * to this subsequent login. */ smb_user_t * smb_session_dup_user(smb_session_t *session, char *domain, char *account_name) { smb_user_t *orig_user = NULL; smb_user_t *user = NULL; orig_user = smb_session_lookup_user(session, domain, account_name); if (orig_user) { user = smb_user_dup(orig_user); smb_user_release(orig_user); } return (user); } /* * smb_request_alloc * * Allocate an smb_request_t structure from the kmem_cache. Partially * initialize the found/new request. * * Returns pointer to a request */ smb_request_t * smb_request_alloc(smb_session_t *session, int req_length) { smb_request_t *sr; ASSERT(session->s_magic == SMB_SESSION_MAGIC); sr = kmem_cache_alloc(session->s_cache_request, KM_SLEEP); /* * Future: Use constructor to pre-initialize some fields. For now * there are so many fields that it is easiest just to zero the * whole thing and start over. */ bzero(sr, sizeof (smb_request_t)); mutex_init(&sr->sr_mutex, NULL, MUTEX_DEFAULT, NULL); sr->session = session; sr->sr_server = session->s_server; sr->sr_gmtoff = session->s_server->si_gmtoff; sr->sr_cache = session->s_server->si_cache_request; sr->sr_cfg = &session->s_cfg; sr->request_storage.forw = &sr->request_storage; sr->request_storage.back = &sr->request_storage; sr->command.max_bytes = req_length; sr->reply.max_bytes = smb_maxbufsize; sr->sr_req_length = req_length; if (req_length) sr->sr_request_buf = kmem_alloc(req_length, KM_SLEEP); sr->sr_magic = SMB_REQ_MAGIC; sr->sr_state = SMB_REQ_STATE_INITIALIZING; smb_slist_insert_tail(&session->s_req_list, sr); return (sr); } /* * smb_request_free * * release the memories which have been allocated for a smb request. */ void smb_request_free(smb_request_t *sr) { ASSERT(sr->sr_magic == SMB_REQ_MAGIC); ASSERT(sr->session); ASSERT(sr->fid_ofile == NULL); ASSERT(sr->sid_odir == NULL); ASSERT(sr->r_xa == NULL); if (sr->tid_tree) smb_tree_release(sr->tid_tree); if (sr->uid_user) smb_user_release(sr->uid_user); smb_slist_remove(&sr->session->s_req_list, sr); sr->session = NULL; /* Release any temp storage */ smbsr_free_malloc_list(&sr->request_storage); if (sr->sr_request_buf) kmem_free(sr->sr_request_buf, sr->sr_req_length); if (sr->command.chain) m_freem(sr->command.chain); if (sr->reply.chain) m_freem(sr->reply.chain); if (sr->raw_data.chain) m_freem(sr->raw_data.chain); sr->sr_magic = 0; mutex_destroy(&sr->sr_mutex); kmem_cache_free(sr->sr_cache, sr); }