1 /* SPDX-License-Identifier: LGPL-2.1 */
51  * max attribute cache timeout (jiffies) - 2^30
160 	struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */
162 	struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */
164 	struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */
165 	struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */
198 	kfree(data->symlink_target);  in cifs_free_open_info()
268 	 * message field DataRemaining for out-of-band data read (e.g through
298 	unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
300 	unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
323 	int (*query_path_info)(const unsigned int xid, struct cifs_tcon *tcon,
327 	int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon,
330 	int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
334 	int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon,
354 			umode_t mode, struct cifs_tcon *tcon,
358 		     struct cifs_tcon *tcon, const char *name,
384 	/* open a file for non-posix mounts */
387 	/* set fid protocol-specific info */
393 	void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
452 	int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
454 	int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
506 	/* init transform request - used for encryption for now */
517 				struct cifs_tcon *tcon,
525 			 struct cifs_tcon *tcon,
530 	int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
561 #define HEADER_SIZE(server) (server->vals->header_size)
562 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
563 #define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size)
564 #define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server))
660 	/* message size the server can send or receive for non-raw SMBs */
668 	__u64 CurrentMid;         /* multiplex id - rotating counter, protected by GlobalMid_Lock */
726 	bool noblockcnt; /* use non-blocking connect() */
730 	 * primary_server holds the ref-counted
733 #define CIFS_SERVER_IS_CHAN(server)	(!!(server)->primary_server)
767 	mutex_lock(&server->_srv_mutex);  in cifs_server_lock()
768 	server->nofs_flag = nofs_flag;  in cifs_server_lock()
773 	unsigned int nofs_flag = server->nofs_flag;  in cifs_server_unlock()
775 	mutex_unlock(&server->_srv_mutex);  in cifs_server_unlock()
788 	spin_lock(&server->req_lock);  in in_flight()
789 	num = server->in_flight;  in in_flight()
790 	spin_unlock(&server->req_lock);  in in_flight()
798 	spin_lock(&server->req_lock);  in has_credits()
800 	spin_unlock(&server->req_lock);  in has_credits()
808 	server->ops->add_credits(server, credits, optype);  in add_credits()
815 	if (credits->value) {  in add_credits_and_wake_if()
816 		server->ops->add_credits(server, credits, optype);  in add_credits_and_wake_if()
817 		wake_up(&server->request_q);  in add_credits_and_wake_if()
824 	server->ops->set_credits(server, val);  in set_credits()
831 	return server->ops->adjust_credits ?  in adjust_credits()
832 		server->ops->adjust_credits(server, credits, payload_size) : 0;  in adjust_credits()
838 	return cpu_to_le64(server->ops->get_next_mid(server));  in get_next_mid64()
844 	__u16 mid = server->ops->get_next_mid(server);  in get_next_mid()
847 	 * on-the-wire decoding.  in get_next_mid()
855 	if (server->ops->revert_current_mid)  in revert_current_mid()
856 		server->ops->revert_current_mid(server, val);  in revert_current_mid()
863 	unsigned int num = le16_to_cpu(shdr->CreditCharge);  in revert_current_mid_from_hdr()
871 	return le16_to_cpu(smb->Mid);  in get_mid()
877 	return mid == le16_to_cpu(smb->Mid);  in compare_mid()
882  * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
893 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
894 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
898  * of 2^17-1 minus the size of the call header. That allows for a read or
901 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
902 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
915 …s.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance…
921  * Macros to allow the TCP_Server_Info->net field and related code to drop out
929 	return srv->net;  in cifs_net_ns()
934 	srv->net = net;  in cifs_set_net_ns()
967 	list_del_init(&iface->iface_head);  in release_iface()
975  * return -1 otherwise.
983 	if (a->speed == b->speed) {  in iface_cmp()
984 		if (a->rdma_capable == b->rdma_capable) {  in iface_cmp()
985 			if (a->rss_capable == b->rss_capable) {  in iface_cmp()
986 				cmp_ret = memcmp(&a->sockaddr, &b->sockaddr,  in iface_cmp()
987 						 sizeof(a->sockaddr));  in iface_cmp()
993 					return -1;  in iface_cmp()
994 			} else if (a->rss_capable > b->rss_capable)  in iface_cmp()
997 				return -1;  in iface_cmp()
998 		} else if (a->rdma_capable > b->rdma_capable)  in iface_cmp()
1001 			return -1;  in iface_cmp()
1002 	} else if (a->speed > b->speed)  in iface_cmp()
1005 		return -1;  in iface_cmp()
1028 	unsigned overrideSecFlg;  /* if non-zero override global sec flags */
1073 	((1UL << (ses)->chan_count) - 1)
1075 	(!(ses)->chans_need_reconnect)
1077 	((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
1079 	((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
1081 	test_bit((index), &(ses)->chans_need_reconnect)
1083 	((ses)->chans[(index)].in_reconnect)
1095 	 * We will ask for sess and tcon reconnection only if all the
1097 	 * enable the sessions on top to continue to live till any
1107 	return ses->server->vals->cap_unix & ses->capabilities;  in cap_unix()
1158 	char *password;		/* for share-level security */
1213 	bool need_reopen_files:1; /* need to reopen tcon file handles */
1223 	__u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1244  * This is a refcounted and timestamped container for a tcon pointer. The
1245  * container holds a tcon reference. It is considered safe to free one of
1267 	return tlink->tl_tcon;  in tlink_tcon()
1273 	return cifs_sb->master_tlink;  in cifs_sb_master_tlink()
1282 		atomic_inc(&tlink->tl_count);  in cifs_get_tlink()
1340 #define ACL_NO_MODE	((umode_t)(-1))
1342 	struct cifs_tcon *tcon;  member
1375 	/* following two lists are protected by tcon->open_file_lock */
1376 	struct list_head tlist;	/* pointer to next fid owned by tcon */
1378 	/* lock list below protected by cifsi->lock_sem */
1412 	struct cifs_tcon *tcon;  member
1498  * cfile->file_info_lock held.
1503 	++cifs_file->count;  in cifsFileInfo_get_locked()
1518 #define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->netfs.i…
1519 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1520 #define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->netfs…
1554 	u64  server_eof;		/* current file size on server -- protected by i_lock */
1573 	return sb->s_fs_info;  in CIFS_SB()
1579 	return CIFS_SB(file_inode(file)->i_sb);  in CIFS_FILE_SB()
1584 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)  in CIFS_DIR_SEP()
1607 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,  in cifs_stats_bytes_written()  argument
1611 		spin_lock(&tcon->stat_lock);  in cifs_stats_bytes_written()
1612 		tcon->bytes_written += bytes;  in cifs_stats_bytes_written()
1613 		spin_unlock(&tcon->stat_lock);  in cifs_stats_bytes_written()
1617 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,  in cifs_stats_bytes_read()  argument
1620 	spin_lock(&tcon->stat_lock);  in cifs_stats_bytes_read()
1621 	tcon->bytes_read += bytes;  in cifs_stats_bytes_read()
1622 	spin_unlock(&tcon->stat_lock);  in cifs_stats_bytes_read()
1631  * - This will be called by cifsd, with no locks held.
1632  * - The mid will still be on the pending_mid_q.
1633  * - mid->resp_buf will point to the current buffer.
1646  * - it will be called by cifsd, with no locks held
1647  * - the mid will be removed from any lists
1692 	struct cifs_tcon        *tcon;  member
1702 	atomic_inc(&server->in_send);  in cifs_in_send_inc()
1707 	atomic_dec(&server->in_send);  in cifs_in_send_dec()
1712 	atomic_inc(&server->num_waiters);  in cifs_num_waiters_inc()
1717 	atomic_dec(&server->num_waiters);  in cifs_num_waiters_dec()
1723 	mid->when_sent = jiffies;  in cifs_save_when_sent()
1763 		kfree(param->path_name);  in free_dfs_info_param()
1764 		kfree(param->node_name);  in free_dfs_info_param()
1784 	case -EINTR:  in is_interrupt_error()
1785 	case -ERESTARTSYS:  in is_interrupt_error()
1786 	case -ERESTARTNOHAND:  in is_interrupt_error()
1787 	case -ERESTARTNOINTR:  in is_interrupt_error()
1795 	if (is_interrupt_error(error) || error == -EAGAIN)  in is_retryable_error()
1828 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
1891  * (top to bottom).
1894  * this in the comments on top of your function definition.
1912  * vol_info->ctx_lock		vol_info->ctx
1913  * cifs_sb_info->tlink_tree_lock	cifs_sb_info->tlink_tree	cifs_setup_cifs_sb
1914  * TCP_Server_Info->		TCP_Server_Info			cifs_get_tcp_session
1916  * TCP_Server_Info->srv_mutex	TCP_Server_Info			cifs_get_tcp_session
1917  * cifs_ses->session_mutex		cifs_ses		sesInfoAlloc
1919  * cifs_tcon->open_file_lock	cifs_tcon->openFileList		tconInfoAlloc
1920  *				cifs_tcon->pending_opens
1921  * cifs_tcon->stat_lock		cifs_tcon->bytes_read		tconInfoAlloc
1922  *				cifs_tcon->bytes_written
1927  * TCP_Server_Info->srv_lock	(anything in struct not protected by another lock and can change)
1928  * TCP_Server_Info->mid_lock	TCP_Server_Info->pending_mid_q	cifs_get_tcp_session
1929  *				->CurrentMid
1931  * TCP_Server_Info->req_lock	TCP_Server_Info->in_flight	cifs_get_tcp_session
1932  *				->credits
1933  *				->echo_credits
1934  *				->oplock_credits
1935  *				->reconnect_instance
1936  * cifs_ses->ses_lock		(anything that is not protected by another lock and can change)
1937  * cifs_ses->iface_lock		cifs_ses->iface_list		sesInfoAlloc
1938  *				->iface_count
1939  *				->iface_last_update
1940  * cifs_ses->chan_lock		cifs_ses->chans
1941  *				->chans_need_reconnect
1942  *				->chans_in_reconnect
1943  * cifs_tcon->tc_lock		(anything that is not protected by another lock and can change)
1944  * cifsInodeInfo->open_file_lock	cifsInodeInfo->openFileList	cifs_alloc_inode
1945  * cifsInodeInfo->writers_lock	cifsInodeInfo->writers		cifsInodeInfo_alloc
1946  * cifsInodeInfo->lock_sem	cifsInodeInfo->llist		cifs_init_once
1947  *				->can_cache_brlcks
1948  * cifsInodeInfo->deferred_lock	cifsInodeInfo->deferred_closes	cifsInodeInfo_alloc
1949  * cached_fid->fid_mutex		cifs_tcon->crfid		tconInfoAlloc
1950  * cifsFileInfo->fh_mutex		cifsFileInfo			cifs_new_fileinfo
1951  * cifsFileInfo->file_info_lock	cifsFileInfo->count		cifs_new_fileinfo
1952  *				->invalidHandle			initiate_cifs_search
1953  *				->oplock_break_cancelled
1954  * cifs_aio_ctx->aio_mutex		cifs_aio_ctx			cifs_aio_ctx_alloc
1974  * tcp session, and the list of tcon's per smb session. It also protects
1975  * the reference counters for the server, smb session, and tcon.
1977  * tcon->open_file_lock and that before file->file_info_lock since the
1978  * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
2015 extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
2016 extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
2084 	return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;  in is_smb1_server()
2087 static inline bool is_tcon_dfs(struct cifs_tcon *tcon)  in is_tcon_dfs()  argument
2090 	 * 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()
2093 	 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server  in is_tcon_dfs()
2096 	if (!tcon || !tcon->ses || !tcon->ses->server)  in is_tcon_dfs()
2098 	return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :  in is_tcon_dfs()
2099 		tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);  in is_tcon_dfs()
2102 static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,  in cifs_is_referral_server()  argument
2107 	 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.  in cifs_is_referral_server()
2109 	return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));  in cifs_is_referral_server()
2114 	return (u64)fl->fl_end - fl->fl_start + 1;  in cifs_flock_len()
2119 	if (WARN_ON_ONCE(!ses || !ses->server))  in ntlmssp_workstation_name_size()
2125 	if (ses->server->dialect <= SMB20_PROT_ID)  in ntlmssp_workstation_name_size()
2126 		return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL);  in ntlmssp_workstation_name_size()
2127 	return sizeof(ses->workstation_name);  in ntlmssp_workstation_name_size()
2132 	memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src));  in move_cifs_info_to_smb2()
2133 	dst->AccessFlags = src->AccessFlags;  in move_cifs_info_to_smb2()
2134 	dst->CurrentByteOffset = src->CurrentByteOffset;  in move_cifs_info_to_smb2()
2135 	dst->Mode = src->Mode;  in move_cifs_info_to_smb2()
2136 	dst->AlignmentRequirement = src->AlignmentRequirement;  in move_cifs_info_to_smb2()
2137 	dst->FileNameLength = src->FileNameLength;  in move_cifs_info_to_smb2()