1 /* SPDX-License-Identifier: LGPL-2.1 */
59  * max attribute cache timeout (jiffies) - 2^30
113 #define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses))
225 	struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */
227 	struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */
228 	struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */
340 	 * message field DataRemaining for out-of-band data read (e.g through
472 	/* open a file for non-posix mounts */
475 	/* set fid protocol-specific info */
497 	/* open dir, start readdir */
506 	/* close dir */
658 #define HEADER_SIZE(server) (server->vals->header_size)
659 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
660 #define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size)
661 #define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server))
756 	/* message size the server can send or receive for non-raw SMBs */
764 	__u64 current_mid;	/* multiplex id - rotating counter, protected by mid_counter_lock */
783 	bool	sec_iakerb;		/* supports pass-through auth for Kerberos (krb5 proxy) */
798 	atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
800 	__u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
836 	bool noblockcnt; /* use non-blocking connect() */
840 	 * primary_server holds the ref-counted
843 #define SERVER_IS_CHAN(server)	(!!(server)->primary_server)
871 	mutex_lock(&server->_srv_mutex);  in cifs_server_lock()
872 	server->nofs_flag = nofs_flag;  in cifs_server_lock()
877 	unsigned int nofs_flag = server->nofs_flag;  in cifs_server_unlock()
879 	mutex_unlock(&server->_srv_mutex);  in cifs_server_unlock()
896 	spin_lock(&server->req_lock);  in in_flight()
897 	num = server->in_flight;  in in_flight()
898 	spin_unlock(&server->req_lock);  in in_flight()
907 	spin_lock(&server->req_lock);  in has_credits()
909 	spin_unlock(&server->req_lock);  in has_credits()
917 	server->ops->add_credits(server, credits, optype);  in add_credits()
924 	if (credits->value) {  in add_credits_and_wake_if()
925 		server->ops->add_credits(server, credits, optype);  in add_credits_and_wake_if()
926 		wake_up(&server->request_q);  in add_credits_and_wake_if()
927 		credits->value = 0;  in add_credits_and_wake_if()
934 	server->ops->set_credits(server, val);  in set_credits()
941 	return server->ops->adjust_credits ?  in adjust_credits()
942 		server->ops->adjust_credits(server, subreq, trace) : 0;  in adjust_credits()
948 	return cpu_to_le64(server->ops->get_next_mid(server));  in get_next_mid64()
954 	__u16 mid = server->ops->get_next_mid(server);  in get_next_mid()
957 	 * on-the-wire decoding.  in get_next_mid()
965 	if (server->ops->revert_current_mid)  in revert_current_mid()
966 		server->ops->revert_current_mid(server, val);  in revert_current_mid()
973 	unsigned int num = le16_to_cpu(shdr->CreditCharge);  in revert_current_mid_from_hdr()
981 	return le16_to_cpu(smb->Mid);  in get_mid()
987 	return mid == le16_to_cpu(smb->Mid);  in compare_mid()
992  * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
1003 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
1004 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
1008  * of 2^17-1 minus the size of the call header. That allows for a read or
1011 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
1012 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
1023 …s.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance…
1029  * Macros to allow the TCP_Server_Info->net field and related code to drop out
1037 	return srv->net;  in cifs_net_ns()
1042 	srv->net = net;  in cifs_set_net_ns()
1104 	unsigned int overrideSecFlg; /* if non-zero override global sec flags */
1153 #define CIFS_INVAL_CHAN_INDEX (-1)
1155 	((1UL << (ses)->chan_count) - 1)
1157 	(!(ses)->chans_need_reconnect)
1159 	((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
1161 	((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
1163 	test_bit((index), &(ses)->chans_need_reconnect)
1165 	((ses)->chans[(index)].in_reconnect)
1192 	return ses->server->vals->cap_unix & ses->capabilities;  in cap_unix()
1244 	char *password;		/* for share-level security */
1311 	__u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1361 	return tlink->tl_tcon;  in tlink_tcon()
1367 	return cifs_sb->master_tlink;  in cifs_sb_master_tlink()
1376 		atomic_inc(&tlink->tl_count);  in cifs_get_tlink()
1434 #define ACL_NO_MODE	((umode_t)(-1))
1473 	/* following two lists are protected by tcon->open_file_lock */
1476 	/* lock list below protected by cifsi->lock_sem */
1545  * cfile->file_info_lock held.
1550 	++cifs_file->count;  in cifsFileInfo_get_locked()
1570 #define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->netfs.i…
1571 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1572 #define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->netfs…
1624 	return sb->s_fs_info;  in CIFS_SB()
1630 	return CIFS_SB(file_inode(file)->i_sb);  in CIFS_FILE_SB()
1635 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)  in CIFS_DIR_SEP()
1662 		spin_lock(&tcon->stat_lock);  in cifs_stats_bytes_written()
1663 		tcon->bytes_written += bytes;  in cifs_stats_bytes_written()
1664 		spin_unlock(&tcon->stat_lock);  in cifs_stats_bytes_written()
1671 	spin_lock(&tcon->stat_lock);  in cifs_stats_bytes_read()
1672 	tcon->bytes_read += bytes;  in cifs_stats_bytes_read()
1673 	spin_unlock(&tcon->stat_lock);  in cifs_stats_bytes_read()
1682  * - This will be called by cifsd, with no locks held.
1683  * - The mid will still be on the pending_mid_q.
1684  * - mid->resp_buf will point to the current buffer.
1697  * - it will be called by cifsd, with no locks held
1698  * - the mid will be removed from any lists
1749 	__u16 cmd;  member
1756 	atomic_inc(&server->in_send);  in cifs_in_send_inc()
1761 	atomic_dec(&server->in_send);  in cifs_in_send_dec()
1766 	atomic_inc(&server->num_waiters);  in cifs_num_waiters_inc()
1771 	atomic_dec(&server->num_waiters);  in cifs_num_waiters_dec()
1777 	mid->when_sent = jiffies;  in cifs_save_when_sent()
1825 	kfree(param->path_name);  in __free_dfs_info_param()
1826 	kfree(param->node_name);  in __free_dfs_info_param()
1860 	case -EINTR:  in is_interrupt_error()
1861 	case -ERESTARTSYS:  in is_interrupt_error()
1862 	case -ERESTARTNOHAND:  in is_interrupt_error()
1863 	case -ERESTARTNOINTR:  in is_interrupt_error()
1871 	if (is_interrupt_error(error) || error == -EAGAIN)  in is_retryable_error()
1878 	if (error == -EAGAIN || error == -ECONNABORTED)  in is_replayable_error()
1912 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
1997  * vol_info->ctx_lock		vol_info->ctx
1998  * cifs_sb_info->tlink_tree_lock	cifs_sb_info->tlink_tree	cifs_setup_cifs_sb
1999  * TCP_Server_Info->		TCP_Server_Info			cifs_get_tcp_session
2001  * TCP_Server_Info->srv_mutex	TCP_Server_Info			cifs_get_tcp_session
2002  * cifs_ses->session_mutex	cifs_ses			sesInfoAlloc
2003  * cifs_tcon->open_file_lock	cifs_tcon->openFileList		tconInfoAlloc
2004  *				cifs_tcon->pending_opens
2005  * cifs_tcon->stat_lock		cifs_tcon->bytes_read		tconInfoAlloc
2006  *				cifs_tcon->bytes_written
2011  * TCP_Server_Info->srv_lock	(anything in struct not protected by another lock and can change)
2012  * TCP_Server_Info->mid_queue_lock	TCP_Server_Info->pending_mid_q	cifs_get_tcp_session
2013  *				mid_q_entry->deleted_from_q
2014  * TCP_Server_Info->mid_counter_lock    TCP_Server_Info->current_mid    cifs_get_tcp_session
2015  * TCP_Server_Info->req_lock	TCP_Server_Info->in_flight	cifs_get_tcp_session
2016  *				->credits
2017  *				->echo_credits
2018  *				->oplock_credits
2019  *				->reconnect_instance
2020  * cifs_ses->ses_lock		(anything that is not protected by another lock and can change)
2022  * cifs_ses->iface_lock		cifs_ses->iface_list		sesInfoAlloc
2023  *				->iface_count
2024  *				->iface_last_update
2025  * cifs_ses->chan_lock		cifs_ses->chans			sesInfoAlloc
2026  *				->chans_need_reconnect
2027  *				->chans_in_reconnect
2028  * cifs_tcon->tc_lock		(anything that is not protected by another lock and can change)
2030  * inode->i_rwsem, taken by fs/netfs/locking.c e.g. should be taken before cifsInodeInfo locks
2031  * cifsInodeInfo->open_file_lock	cifsInodeInfo->openFileList	cifs_alloc_inode
2032  * cifsInodeInfo->writers_lock	cifsInodeInfo->writers		cifsInodeInfo_alloc
2033  * cifsInodeInfo->lock_sem	cifsInodeInfo->llist		cifs_init_once
2034  *				->can_cache_brlcks
2035  * cifsInodeInfo->deferred_lock	cifsInodeInfo->deferred_closes	cifsInodeInfo_alloc
2036  * cached_fids->cfid_list_lock	cifs_tcon->cfids->entries	init_cached_dirs
2037  * cached_fid->fid_lock		(anything that is not protected by another lock and can change)
2039  * cifsFileInfo->fh_mutex	cifsFileInfo			cifs_new_fileinfo
2040  * cifsFileInfo->file_info_lock	cifsFileInfo->count		cifs_new_fileinfo
2041  *				->invalidHandle			initiate_cifs_search
2042  *				->oplock_break_cancelled
2043  * mid_q_entry->mid_lock	mid_q_entry->callback           alloc_mid
2068  * tcon->open_file_lock and that before file->file_info_lock since the
2069  * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
2106 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
2107 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
2114 extern unsigned int dir_cache_timeout; /* max time for directory lease caching of dir */
2174 	return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;  in is_smb1_server()
2180 	 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS  in is_tcon_dfs()
2183 	 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server  in is_tcon_dfs()
2186 	if (!tcon || !tcon->ses || !tcon->ses->server)  in is_tcon_dfs()
2188 	return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :  in is_tcon_dfs()
2189 		tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);  in is_tcon_dfs()
2197 	 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.  in cifs_is_referral_server()
2199 	return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));  in cifs_is_referral_server()
2204 	return (u64)fl->fl_end - fl->fl_start + 1;  in cifs_flock_len()
2209 	if (WARN_ON_ONCE(!ses || !ses->server))  in ntlmssp_workstation_name_size()
2215 	if (ses->server->dialect <= SMB20_PROT_ID)  in ntlmssp_workstation_name_size()
2216 		return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL);  in ntlmssp_workstation_name_size()
2217 	return sizeof(ses->workstation_name);  in ntlmssp_workstation_name_size()
2222 	memcpy(dst, src, (size_t)((u8 *)&src->EASize - (u8 *)src));  in move_cifs_info_to_smb2()
2223 	dst->IndexNumber = 0;  in move_cifs_info_to_smb2()
2224 	dst->EASize = src->EASize;  in move_cifs_info_to_smb2()
2225 	dst->AccessFlags = 0;  in move_cifs_info_to_smb2()
2226 	dst->CurrentByteOffset = 0;  in move_cifs_info_to_smb2()
2227 	dst->Mode = 0;  in move_cifs_info_to_smb2()
2228 	dst->AlignmentRequirement = 0;  in move_cifs_info_to_smb2()
2229 	dst->FileNameLength = src->FileNameLength;  in move_cifs_info_to_smb2()
2234 				   const u8 *sig)  in cifs_get_num_sgs()  argument
2259 		 * Instead, we convert to a BVEC-type iterator higher up.  in cifs_get_num_sgs()
2263 			return -EIO;  in cifs_get_num_sgs()
2270 			return -EIO;  in cifs_get_num_sgs()
2275 			addr = (unsigned long)iov->iov_base + skip;  in cifs_get_num_sgs()
2277 				len = iov->iov_len - skip;  in cifs_get_num_sgs()
2288 	nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE);  in cifs_get_num_sgs()
2305 			unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off);  in cifs_sg_set_buf()
2307 			sg_set_page(&sgtable->sgl[sgtable->nents++],  in cifs_sg_set_buf()
2312 			buflen -= len;  in cifs_sg_set_buf()
2315 		sg_set_page(&sgtable->sgl[sgtable->nents++],  in cifs_sg_set_buf()
2351 	spin_lock(&ses->ses_lock);  in cifs_ses_exiting()
2352 	ret = ses->ses_status == SES_EXITING;  in cifs_ses_exiting()
2353 	spin_unlock(&ses->ses_lock);  in cifs_ses_exiting()
2378  * Execute mid callback atomically - ensures callback runs exactly once
2385 	spin_lock(&mid->mid_lock);  in mid_execute_callback()
2386 	callback = mid->callback;  in mid_execute_callback()
2387 	mid->callback = NULL;  /* Mark as executed, */  in mid_execute_callback()
2388 	spin_unlock(&mid->mid_lock);  in mid_execute_callback()
2395 	((tcon)->posix_extensions || \
2396 	 (le32_to_cpu((tcon)->fsAttrInfo.Attributes) & \