smb: move client and server files to common directory fs/smb

Move CIFS/SMB3 related client and server files (cifs.ko and ksmbd.ko
and helper modules) to new fs/smb subdirectory:

   fs/cifs --> fs/smb/client
   fs/ksmbd --> fs/smb/server
   fs/smbfs_common --> fs/smb/common

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

1 files changed, 0 insertions, 2225 deletions

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
deleted file mode 100644
index 5f8fd20951af..000000000000
--- a/fs/cifs/cifsglob.h
+++ /dev/null
@@ -1,2225 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1 */
-/*
- *
- *   Copyright (C) International Business Machines  Corp., 2002,2008
- *   Author(s): Steve French (sfrench@us.ibm.com)
- *              Jeremy Allison (jra@samba.org)
- *
- */
-#ifndef _CIFS_GLOB_H
-#define _CIFS_GLOB_H
-
-#include <linux/in.h>
-#include <linux/in6.h>
-#include <linux/inet.h>
-#include <linux/slab.h>
-#include <linux/scatterlist.h>
-#include <linux/mm.h>
-#include <linux/mempool.h>
-#include <linux/workqueue.h>
-#include <linux/utsname.h>
-#include <linux/sched/mm.h>
-#include <linux/netfs.h>
-#include "cifs_fs_sb.h"
-#include "cifsacl.h"
-#include <crypto/internal/hash.h>
-#include <uapi/linux/cifs/cifs_mount.h>
-#include "../smbfs_common/smb2pdu.h"
-#include "smb2pdu.h"
-#include <linux/filelock.h>
-
-#define SMB_PATH_MAX 260
-#define CIFS_PORT 445
-#define RFC1001_PORT 139
-
-/*
- * The sizes of various internal tables and strings
- */
-#define MAX_UID_INFO 16
-#define MAX_SES_INFO 2
-#define MAX_TCON_INFO 4
-
-#define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
-
-#define CIFS_MIN_RCV_POOL 4
-
-#define MAX_REOPEN_ATT	5 /* these many maximum attempts to reopen a file */
-/*
- * default attribute cache timeout (jiffies)
- */
-#define CIFS_DEF_ACTIMEO (1 * HZ)
-
-/*
- * max attribute cache timeout (jiffies) - 2^30
- */
-#define CIFS_MAX_ACTIMEO (1 << 30)
-
-/*
- * Max persistent and resilient handle timeout (milliseconds).
- * Windows durable max was 960000 (16 minutes)
- */
-#define SMB3_MAX_HANDLE_TIMEOUT 960000
-
-/*
- * MAX_REQ is the maximum number of requests that WE will send
- * on one socket concurrently.
- */
-#define CIFS_MAX_REQ 32767
-
-#define RFC1001_NAME_LEN 15
-#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
-
-/* maximum length of ip addr as a string (including ipv6 and sctp) */
-#define SERVER_NAME_LENGTH 80
-#define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)
-
-/* echo interval in seconds */
-#define SMB_ECHO_INTERVAL_MIN 1
-#define SMB_ECHO_INTERVAL_MAX 600
-#define SMB_ECHO_INTERVAL_DEFAULT 60
-
-/* smb multichannel query server interfaces interval in seconds */
-#define SMB_INTERFACE_POLL_INTERVAL	600
-
-/* maximum number of PDUs in one compound */
-#define MAX_COMPOUND 5
-
-/*
- * Default number of credits to keep available for SMB3.
- * This value is chosen somewhat arbitrarily. The Windows client
- * defaults to 128 credits, the Windows server allows clients up to
- * 512 credits (or 8K for later versions), and the NetApp server
- * does not limit clients at all.  Choose a high enough default value
- * such that the client shouldn't limit performance, but allow mount
- * to override (until you approach 64K, where we limit credits to 65000
- * to reduce possibility of seeing more server credit overflow bugs.
- */
-#define SMB2_MAX_CREDITS_AVAILABLE 32000
-
-#include "cifspdu.h"
-
-#ifndef XATTR_DOS_ATTRIB
-#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
-#endif
-
-#define CIFS_MAX_WORKSTATION_LEN  (__NEW_UTS_LEN + 1)  /* reasonable max for client */
-
-#define CIFS_DFS_ROOT_SES(ses) ((ses)->dfs_root_ses ?: (ses))
-
-/*
- * CIFS vfs client Status information (based on what we know.)
- */
-
-/* associated with each connection */
-enum statusEnum {
-	CifsNew = 0,
-	CifsGood,
-	CifsExiting,
-	CifsNeedReconnect,
-	CifsNeedNegotiate,
-	CifsInNegotiate,
-};
-
-/* associated with each smb session */
-enum ses_status_enum {
-	SES_NEW = 0,
-	SES_GOOD,
-	SES_EXITING,
-	SES_NEED_RECON,
-	SES_IN_SETUP
-};
-
-/* associated with each tree connection to the server */
-enum tid_status_enum {
-	TID_NEW = 0,
-	TID_GOOD,
-	TID_EXITING,
-	TID_NEED_RECON,
-	TID_NEED_TCON,
-	TID_IN_TCON,
-	TID_NEED_FILES_INVALIDATE, /* currently unused */
-	TID_IN_FILES_INVALIDATE
-};
-
-enum securityEnum {
-	Unspecified = 0,	/* not specified */
-	NTLMv2,			/* Legacy NTLM auth with NTLMv2 hash */
-	RawNTLMSSP,		/* NTLMSSP without SPNEGO, NTLMv2 hash */
-	Kerberos,		/* Kerberos via SPNEGO */
-};
-
-struct session_key {
-	unsigned int len;
-	char *response;
-};
-
-/* crypto hashing related structure/fields, not specific to a sec mech */
-struct cifs_secmech {
-	struct shash_desc *hmacmd5; /* hmacmd5 hash function, for NTLMv2/CR1 hashes */
-	struct shash_desc *md5; /* md5 hash function, for CIFS/SMB1 signatures */
-	struct shash_desc *hmacsha256; /* hmac-sha256 hash function, for SMB2 signatures */
-	struct shash_desc *sha512; /* sha512 hash function, for SMB3.1.1 preauth hash */
-	struct shash_desc *aes_cmac; /* block-cipher based MAC function, for SMB3 signatures */
-
-	struct crypto_aead *enc; /* smb3 encryption AEAD TFM (AES-CCM and AES-GCM) */
-	struct crypto_aead *dec; /* smb3 decryption AEAD TFM (AES-CCM and AES-GCM) */
-};
-
-/* per smb session structure/fields */
-struct ntlmssp_auth {
-	bool sesskey_per_smbsess; /* whether session key is per smb session */
-	__u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
-	__u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
-	unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
-	char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
-};
-
-struct cifs_cred {
-	int uid;
-	int gid;
-	int mode;
-	int cecount;
-	struct cifs_sid osid;
-	struct cifs_sid gsid;
-	struct cifs_ntace *ntaces;
-	struct cifs_ace *aces;
-};
-
-struct cifs_open_info_data {
-	char *symlink_target;
-	union {
-		struct smb2_file_all_info fi;
-		struct smb311_posix_qinfo posix_fi;
-	};
-};
-
-static inline void cifs_free_open_info(struct cifs_open_info_data *data)
-{
-	kfree(data->symlink_target);
-}
-
-/*
- *****************************************************************
- * Except the CIFS PDUs themselves all the
- * globally interesting structs should go here
- *****************************************************************
- */
-
-/*
- * A smb_rqst represents a complete request to be issued to a server. It's
- * formed by a kvec array, followed by an array of pages. Page data is assumed
- * to start at the beginning of the first page.
- */
-struct smb_rqst {
-	struct kvec	*rq_iov;	/* array of kvecs */
-	unsigned int	rq_nvec;	/* number of kvecs in array */
-	size_t		rq_iter_size;	/* Amount of data in ->rq_iter */
-	struct iov_iter	rq_iter;	/* Data iterator */
-	struct xarray	rq_buffer;	/* Page buffer for encryption */
-};
-
-struct mid_q_entry;
-struct TCP_Server_Info;
-struct cifsFileInfo;
-struct cifs_ses;
-struct cifs_tcon;
-struct dfs_info3_param;
-struct cifs_fattr;
-struct smb3_fs_context;
-struct cifs_fid;
-struct cifs_readdata;
-struct cifs_writedata;
-struct cifs_io_parms;
-struct cifs_search_info;
-struct cifsInodeInfo;
-struct cifs_open_parms;
-struct cifs_credits;
-
-struct smb_version_operations {
-	int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
-			   struct mid_q_entry *);
-	bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
-	/* setup request: allocate mid, sign message */
-	struct mid_q_entry *(*setup_request)(struct cifs_ses *,
-					     struct TCP_Server_Info *,
-					     struct smb_rqst *);
-	/* setup async request: allocate mid, sign message */
-	struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
-						struct smb_rqst *);
-	/* check response: verify signature, map error */
-	int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
-			     bool);
-	void (*add_credits)(struct TCP_Server_Info *server,
-			    const struct cifs_credits *credits,
-			    const int optype);
-	void (*set_credits)(struct TCP_Server_Info *, const int);
-	int * (*get_credits_field)(struct TCP_Server_Info *, const int);
-	unsigned int (*get_credits)(struct mid_q_entry *);
-	__u64 (*get_next_mid)(struct TCP_Server_Info *);
-	void (*revert_current_mid)(struct TCP_Server_Info *server,
-				   const unsigned int val);
-	/* data offset from read response message */
-	unsigned int (*read_data_offset)(char *);
-	/*
-	 * Data length from read response message
-	 * When in_remaining is true, the returned data length is in
-	 * message field DataRemaining for out-of-band data read (e.g through
-	 * Memory Registration RDMA write in SMBD).
-	 * Otherwise, the returned data length is in message field DataLength.
-	 */
-	unsigned int (*read_data_length)(char *, bool in_remaining);
-	/* map smb to linux error */
-	int (*map_error)(char *, bool);
-	/* find mid corresponding to the response message */
-	struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
-	void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
-	void (*clear_stats)(struct cifs_tcon *);
-	void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
-	void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
-	/* verify the message */
-	int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
-	bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
-	int (*handle_cancelled_mid)(struct mid_q_entry *, struct TCP_Server_Info *);
-	void (*downgrade_oplock)(struct TCP_Server_Info *server,
-				 struct cifsInodeInfo *cinode, __u32 oplock,
-				 unsigned int epoch, bool *purge_cache);
-	/* process transaction2 response */
-	bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
-			     char *, int);
-	/* check if we need to negotiate */
-	bool (*need_neg)(struct TCP_Server_Info *);
-	/* negotiate to the server */
-	int (*negotiate)(const unsigned int xid,
-			 struct cifs_ses *ses,
-			 struct TCP_Server_Info *server);
-	/* set negotiated write size */
-	unsigned int (*negotiate_wsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
-	/* set negotiated read size */
-	unsigned int (*negotiate_rsize)(struct cifs_tcon *tcon, struct smb3_fs_context *ctx);
-	/* setup smb sessionn */
-	int (*sess_setup)(const unsigned int, struct cifs_ses *,
-			  struct TCP_Server_Info *server,
-			  const struct nls_table *);
-	/* close smb session */
-	int (*logoff)(const unsigned int, struct cifs_ses *);
-	/* connect to a server share */
-	int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
-			    struct cifs_tcon *, const struct nls_table *);
-	/* close tree connecion */
-	int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
-	/* get DFS referrals */
-	int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
-			     const char *, struct dfs_info3_param **,
-			     unsigned int *, const struct nls_table *, int);
-	/* informational QFS call */
-	void (*qfs_tcon)(const unsigned int, struct cifs_tcon *,
-			 struct cifs_sb_info *);
-	/* check if a path is accessible or not */
-	int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
-				  struct cifs_sb_info *, const char *);
-	/* query path data from the server */
-	int (*query_path_info)(const unsigned int xid, struct cifs_tcon *tcon,
-			       struct cifs_sb_info *cifs_sb, const char *full_path,
-			       struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse);
-	/* query file data from the server */
-	int (*query_file_info)(const unsigned int xid, struct cifs_tcon *tcon,
-			       struct cifsFileInfo *cfile, struct cifs_open_info_data *data);
-	/* query reparse tag from srv to determine which type of special file */
-	int (*query_reparse_tag)(const unsigned int xid, struct cifs_tcon *tcon,
-				struct cifs_sb_info *cifs_sb, const char *path,
-				__u32 *reparse_tag);
-	/* get server index number */
-	int (*get_srv_inum)(const unsigned int xid, struct cifs_tcon *tcon,
-			    struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid,
-			    struct cifs_open_info_data *data);
-	/* set size by path */
-	int (*set_path_size)(const unsigned int, struct cifs_tcon *,
-			     const char *, __u64, struct cifs_sb_info *, bool);
-	/* set size by file handle */
-	int (*set_file_size)(const unsigned int, struct cifs_tcon *,
-			     struct cifsFileInfo *, __u64, bool);
-	/* set attributes */
-	int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
-			     const unsigned int);
-	int (*set_compression)(const unsigned int, struct cifs_tcon *,
-			       struct cifsFileInfo *);
-	/* check if we can send an echo or nor */
-	bool (*can_echo)(struct TCP_Server_Info *);
-	/* send echo request */
-	int (*echo)(struct TCP_Server_Info *);
-	/* create directory */
-	int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
-			umode_t mode, struct cifs_tcon *tcon,
-			const char *full_path,
-			struct cifs_sb_info *cifs_sb);
-	int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
-		     struct cifs_tcon *tcon, const char *name,
-		     struct cifs_sb_info *sb);
-	/* set info on created directory */
-	void (*mkdir_setinfo)(struct inode *, const char *,
-			      struct cifs_sb_info *, struct cifs_tcon *,
-			      const unsigned int);
-	/* remove directory */
-	int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
-		     struct cifs_sb_info *);
-	/* unlink file */
-	int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
-		      struct cifs_sb_info *);
-	/* open, rename and delete file */
-	int (*rename_pending_delete)(const char *, struct dentry *,
-				     const unsigned int);
-	/* send rename request */
-	int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
-		      const char *, struct cifs_sb_info *);
-	/* send create hardlink request */
-	int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
-			       const char *, const char *,
-			       struct cifs_sb_info *);
-	/* query symlink target */
-	int (*query_symlink)(const unsigned int, struct cifs_tcon *,
-			     struct cifs_sb_info *, const char *,
-			     char **, bool);
-	/* open a file for non-posix mounts */
-	int (*open)(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock,
-		    void *buf);
-	/* set fid protocol-specific info */
-	void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
-	/* close a file */
-	void (*close)(const unsigned int, struct cifs_tcon *,
-		      struct cifs_fid *);
-	/* close a file, returning file attributes and timestamps */
-	void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
-		      struct cifsFileInfo *pfile_info);
-	/* send a flush request to the server */
-	int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
-	/* async read from the server */
-	int (*async_readv)(struct cifs_readdata *);
-	/* async write to the server */
-	int (*async_writev)(struct cifs_writedata *,
-			    void (*release)(struct kref *));
-	/* sync read from the server */
-	int (*sync_read)(const unsigned int, struct cifs_fid *,
-			 struct cifs_io_parms *, unsigned int *, char **,
-			 int *);
-	/* sync write to the server */
-	int (*sync_write)(const unsigned int, struct cifs_fid *,
-			  struct cifs_io_parms *, unsigned int *, struct kvec *,
-			  unsigned long);
-	/* open dir, start readdir */
-	int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
-			       const char *, struct cifs_sb_info *,
-			       struct cifs_fid *, __u16,
-			       struct cifs_search_info *);
-	/* continue readdir */
-	int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
-			      struct cifs_fid *,
-			      __u16, struct cifs_search_info *srch_inf);
-	/* close dir */
-	int (*close_dir)(const unsigned int, struct cifs_tcon *,
-			 struct cifs_fid *);
-	/* calculate a size of SMB message */
-	unsigned int (*calc_smb_size)(void *buf);
-	/* check for STATUS_PENDING and process the response if yes */
-	bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
-	/* check for STATUS_NETWORK_SESSION_EXPIRED */
-	bool (*is_session_expired)(char *);
-	/* send oplock break response */
-	int (*oplock_response)(struct cifs_tcon *tcon, __u64 persistent_fid, __u64 volatile_fid,
-			__u16 net_fid, struct cifsInodeInfo *cifs_inode);
-	/* query remote filesystem */
-	int (*queryfs)(const unsigned int, struct cifs_tcon *,
-		       struct cifs_sb_info *, struct kstatfs *);
-	/* send mandatory brlock to the server */
-	int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
-			 __u64, __u32, int, int, bool);
-	/* unlock range of mandatory locks */
-	int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
-				 const unsigned int);
-	/* push brlocks from the cache to the server */
-	int (*push_mand_locks)(struct cifsFileInfo *);
-	/* get lease key of the inode */
-	void (*get_lease_key)(struct inode *, struct cifs_fid *);
-	/* set lease key of the inode */
-	void (*set_lease_key)(struct inode *, struct cifs_fid *);
-	/* generate new lease key */
-	void (*new_lease_key)(struct cifs_fid *);
-	int (*generate_signingkey)(struct cifs_ses *ses,
-				   struct TCP_Server_Info *server);
-	int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
-				bool allocate_crypto);
-	int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
-			     struct cifsFileInfo *src_file);
-	int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
-			     struct cifsFileInfo *src_file, void __user *);
-	int (*notify)(const unsigned int xid, struct file *pfile,
-			     void __user *pbuf, bool return_changes);
-	int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
-				struct cifs_sb_info *, const unsigned char *,
-				char *, unsigned int *);
-	int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
-				 struct cifs_sb_info *, const unsigned char *,
-				 char *, unsigned int *);
-	/* if we can do cache read operations */
-	bool (*is_read_op)(__u32);
-	/* set oplock level for the inode */
-	void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
-				 bool *);
-	/* create lease context buffer for CREATE request */
-	char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
-	/* parse lease context buffer and return oplock/epoch info */
-	__u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
-	ssize_t (*copychunk_range)(const unsigned int,
-			struct cifsFileInfo *src_file,
-			struct cifsFileInfo *target_file,
-			u64 src_off, u64 len, u64 dest_off);
-	int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
-			struct cifsFileInfo *target_file, u64 src_off, u64 len,
-			u64 dest_off);
-	int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
-	ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
-			const unsigned char *, const unsigned char *, char *,
-			size_t, struct cifs_sb_info *);
-	int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
-			const char *, const void *, const __u16,
-			const struct nls_table *, struct cifs_sb_info *);
-	struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
-			const char *, u32 *, u32);
-	struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
-			const struct cifs_fid *, u32 *, u32);
-	int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
-			int);
-	/* writepages retry size */
-	unsigned int (*wp_retry_size)(struct inode *);
-	/* get mtu credits */
-	int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
-				unsigned int *, struct cifs_credits *);
-	/* adjust previously taken mtu credits to request size */
-	int (*adjust_credits)(struct TCP_Server_Info *server,
-			      struct cifs_credits *credits,
-			      const unsigned int payload_size);
-	/* check if we need to issue closedir */
-	bool (*dir_needs_close)(struct cifsFileInfo *);
-	long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
-			  loff_t);
-	/* init transform request - used for encryption for now */
-	int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
-				 struct smb_rqst *, struct smb_rqst *);
-	int (*is_transform_hdr)(void *buf);
-	int (*receive_transform)(struct TCP_Server_Info *,
-				 struct mid_q_entry **, char **, int *);
-	enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
-			    enum securityEnum);
-	int (*next_header)(char *);
-	/* ioctl passthrough for query_info */
-	int (*ioctl_query_info)(const unsigned int xid,
-				struct cifs_tcon *tcon,
-				struct cifs_sb_info *cifs_sb,
-				__le16 *path, int is_dir,
-				unsigned long p);
-	/* make unix special files (block, char, fifo, socket) */
-	int (*make_node)(unsigned int xid,
-			 struct inode *inode,
-			 struct dentry *dentry,
-			 struct cifs_tcon *tcon,
-			 const char *full_path,
-			 umode_t mode,
-			 dev_t device_number);
-	/* version specific fiemap implementation */
-	int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
-		      struct fiemap_extent_info *, u64, u64);
-	/* version specific llseek implementation */
-	loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
-	/* Check for STATUS_IO_TIMEOUT */
-	bool (*is_status_io_timeout)(char *buf);
-	/* Check for STATUS_NETWORK_NAME_DELETED */
-	void (*is_network_name_deleted)(char *buf, struct TCP_Server_Info *srv);
-};
-
-struct smb_version_values {
-	char		*version_string;
-	__u16		protocol_id;
-	__u32		req_capabilities;
-	__u32		large_lock_type;
-	__u32		exclusive_lock_type;
-	__u32		shared_lock_type;
-	__u32		unlock_lock_type;
-	size_t		header_preamble_size;
-	size_t		header_size;
-	size_t		max_header_size;
-	size_t		read_rsp_size;
-	__le16		lock_cmd;
-	unsigned int	cap_unix;
-	unsigned int	cap_nt_find;
-	unsigned int	cap_large_files;
-	__u16		signing_enabled;
-	__u16		signing_required;
-	size_t		create_lease_size;
-};
-
-#define HEADER_SIZE(server) (server->vals->header_size)
-#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
-#define HEADER_PREAMBLE_SIZE(server) (server->vals->header_preamble_size)
-#define MID_HEADER_SIZE(server) (HEADER_SIZE(server) - 1 - HEADER_PREAMBLE_SIZE(server))
-
-/**
- * CIFS superblock mount flags (mnt_cifs_flags) to consider when
- * trying to reuse existing superblock for a new mount
- */
-#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
-			 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
-			 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
-			 CIFS_MOUNT_MAP_SFM_CHR | \
-			 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
-			 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
-			 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
-			 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
-			 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
-			 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
-			 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
-			 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
-			 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
-			 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
-
-/**
- * Generic VFS superblock mount flags (s_flags) to consider when
- * trying to reuse existing superblock for a new mount
- */
-#define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
-		      SB_NODEV | SB_SYNCHRONOUS)
-
-struct cifs_mnt_data {
-	struct cifs_sb_info *cifs_sb;
-	struct smb3_fs_context *ctx;
-	int flags;
-};
-
-static inline unsigned int
-get_rfc1002_length(void *buf)
-{
-	return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
-}
-
-static inline void
-inc_rfc1001_len(void *buf, int count)
-{
-	be32_add_cpu((__be32 *)buf, count);
-}
-
-struct TCP_Server_Info {
-	struct list_head tcp_ses_list;
-	struct list_head smb_ses_list;
-	spinlock_t srv_lock;  /* protect anything here that is not protected */
-	__u64 conn_id; /* connection identifier (useful for debugging) */
-	int srv_count; /* reference counter */
-	/* 15 character server name + 0x20 16th byte indicating type = srv */
-	char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
-	struct smb_version_operations	*ops;
-	struct smb_version_values	*vals;
-	/* updates to tcpStatus protected by cifs_tcp_ses_lock */
-	enum statusEnum tcpStatus; /* what we think the status is */
-	char *hostname; /* hostname portion of UNC string */
-	struct socket *ssocket;
-	struct sockaddr_storage dstaddr;
-	struct sockaddr_storage srcaddr; /* locally bind to this IP */
-#ifdef CONFIG_NET_NS
-	struct net *net;
-#endif
-	wait_queue_head_t response_q;
-	wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
-	spinlock_t mid_lock;  /* protect mid queue and it's entries */
-	struct list_head pending_mid_q;
-	bool noblocksnd;		/* use blocking sendmsg */
-	bool noautotune;		/* do not autotune send buf sizes */
-	bool nosharesock;
-	bool tcp_nodelay;
-	unsigned int credits;  /* send no more requests at once */
-	unsigned int max_credits; /* can override large 32000 default at mnt */
-	unsigned int in_flight;  /* number of requests on the wire to server */
-	unsigned int max_in_flight; /* max number of requests that were on wire */
-	spinlock_t req_lock;  /* protect the two values above */
-	struct mutex _srv_mutex;
-	unsigned int nofs_flag;
-	struct task_struct *tsk;
-	char server_GUID[16];
-	__u16 sec_mode;
-	bool sign; /* is signing enabled on this connection? */
-	bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
-	bool session_estab; /* mark when very first sess is established */
-	int echo_credits;  /* echo reserved slots */
-	int oplock_credits;  /* oplock break reserved slots */
-	bool echoes:1; /* enable echoes */
-	__u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
-	u16 dialect; /* dialect index that server chose */
-	bool oplocks:1; /* enable oplocks */
-	unsigned int maxReq;	/* Clients should submit no more */
-	/* than maxReq distinct unanswered SMBs to the server when using  */
-	/* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
-	unsigned int maxBuf;	/* maxBuf specifies the maximum */
-	/* message size the server can send or receive for non-raw SMBs */
-	/* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
-	/* when socket is setup (and during reconnect) before NegProt sent */
-	unsigned int max_rw;	/* maxRw specifies the maximum */
-	/* message size the server can send or receive for */
-	/* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
-	unsigned int capabilities; /* selective disabling of caps by smb sess */
-	int timeAdj;  /* Adjust for difference in server time zone in sec */
-	__u64 CurrentMid;         /* multiplex id - rotating counter, protected by GlobalMid_Lock */
-	char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
-	/* 16th byte of RFC1001 workstation name is always null */
-	char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
-	__u32 sequence_number; /* for signing, protected by srv_mutex */
-	__u32 reconnect_instance; /* incremented on each reconnect */
-	struct session_key session_key;
-	unsigned long lstrp; /* when we got last response from this server */
-	struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
-#define	CIFS_NEGFLAVOR_UNENCAP	1	/* wct == 17, but no ext_sec */
-#define	CIFS_NEGFLAVOR_EXTENDED	2	/* wct == 17, ext_sec bit set */
-	char	negflavor;	/* NEGOTIATE response flavor */
-	/* extended security flavors that server supports */
-	bool	sec_ntlmssp;		/* supports NTLMSSP */
-	bool	sec_kerberosu2u;	/* supports U2U Kerberos */
-	bool	sec_kerberos;		/* supports plain Kerberos */
-	bool	sec_mskerberos;		/* supports legacy MS Kerberos */
-	bool	large_buf;		/* is current buffer large? */
-	/* use SMBD connection instead of socket */
-	bool	rdma;
-	/* point to the SMBD connection if RDMA is used instead of socket */
-	struct smbd_connection *smbd_conn;
-	struct delayed_work	echo; /* echo ping workqueue job */
-	char	*smallbuf;	/* pointer to current "small" buffer */
-	char	*bigbuf;	/* pointer to current "big" buffer */
-	/* Total size of this PDU. Only valid from cifs_demultiplex_thread */
-	unsigned int pdu_size;
-	unsigned int total_read; /* total amount of data read in this pass */
-	atomic_t in_send; /* requests trying to send */
-	atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
-#ifdef CONFIG_CIFS_STATS2
-	atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
-	atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
-	__u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
-	__u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
-	__u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
-#endif /* STATS2 */
-	unsigned int	max_read;
-	unsigned int	max_write;
-	unsigned int	min_offload;
-	__le16	compress_algorithm;
-	__u16	signing_algorithm;
-	__le16	cipher_type;
-	 /* save initital negprot hash */
-	__u8	preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
-	bool	signing_negotiated; /* true if valid signing context rcvd from server */
-	bool	posix_ext_supported;
-	struct delayed_work reconnect; /* reconnect workqueue job */
-	struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
-	unsigned long echo_interval;
-
-	/*
-	 * Number of targets available for reconnect. The more targets
-	 * the more tasks have to wait to let the demultiplex thread
-	 * reconnect.
-	 */
-	int nr_targets;
-	bool noblockcnt; /* use non-blocking connect() */
-
-	/*
-	 * If this is a session channel,
-	 * primary_server holds the ref-counted
-	 * pointer to primary channel connection for the session.
-	 */
-#define CIFS_SERVER_IS_CHAN(server)	(!!(server)->primary_server)
-	struct TCP_Server_Info *primary_server;
-
-#ifdef CONFIG_CIFS_SWN_UPCALL
-	bool use_swn_dstaddr;
-	struct sockaddr_storage swn_dstaddr;
-#endif
-	struct mutex refpath_lock; /* protects leaf_fullpath */
-	/*
-	 * origin_fullpath: Canonical copy of smb3_fs_context::source.
-	 *                  It is used for matching existing DFS tcons.
-	 *
-	 * leaf_fullpath: Canonical DFS referral path related to this
-	 *                connection.
-	 *                It is used in DFS cache refresher, reconnect and may
-	 *                change due to nested DFS links.
-	 *
-	 * Both protected by @refpath_lock and @srv_lock.  The @refpath_lock is
-	 * mosly used for not requiring a copy of @leaf_fullpath when getting
-	 * cached or new DFS referrals (which might also sleep during I/O).
-	 * While @srv_lock is held for making string and NULL comparions against
-	 * both fields as in mount(2) and cache refresh.
-	 *
-	 * format: \\HOST\SHARE[\OPTIONAL PATH]
-	 */
-	char *origin_fullpath, *leaf_fullpath;
-};
-
-static inline bool is_smb1(struct TCP_Server_Info *server)
-{
-	return HEADER_PREAMBLE_SIZE(server) != 0;
-}
-
-static inline void cifs_server_lock(struct TCP_Server_Info *server)
-{
-	unsigned int nofs_flag = memalloc_nofs_save();
-
-	mutex_lock(&server->_srv_mutex);
-	server->nofs_flag = nofs_flag;
-}
-
-static inline void cifs_server_unlock(struct TCP_Server_Info *server)
-{
-	unsigned int nofs_flag = server->nofs_flag;
-
-	mutex_unlock(&server->_srv_mutex);
-	memalloc_nofs_restore(nofs_flag);
-}
-
-struct cifs_credits {
-	unsigned int value;
-	unsigned int instance;
-};
-
-static inline unsigned int
-in_flight(struct TCP_Server_Info *server)
-{
-	unsigned int num;
-
-	spin_lock(&server->req_lock);
-	num = server->in_flight;
-	spin_unlock(&server->req_lock);
-	return num;
-}
-
-static inline bool
-has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
-{
-	int num;
-
-	spin_lock(&server->req_lock);
-	num = *credits;
-	spin_unlock(&server->req_lock);
-	return num >= num_credits;
-}
-
-static inline void
-add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
-	    const int optype)
-{
-	server->ops->add_credits(server, credits, optype);
-}
-
-static inline void
-add_credits_and_wake_if(struct TCP_Server_Info *server,
-			const struct cifs_credits *credits, const int optype)
-{
-	if (credits->value) {
-		server->ops->add_credits(server, credits, optype);
-		wake_up(&server->request_q);
-	}
-}
-
-static inline void
-set_credits(struct TCP_Server_Info *server, const int val)
-{
-	server->ops->set_credits(server, val);
-}
-
-static inline int
-adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
-	       const unsigned int payload_size)
-{
-	return server->ops->adjust_credits ?
-		server->ops->adjust_credits(server, credits, payload_size) : 0;
-}
-
-static inline __le64
-get_next_mid64(struct TCP_Server_Info *server)
-{
-	return cpu_to_le64(server->ops->get_next_mid(server));
-}
-
-static inline __le16
-get_next_mid(struct TCP_Server_Info *server)
-{
-	__u16 mid = server->ops->get_next_mid(server);
-	/*
-	 * The value in the SMB header should be little endian for easy
-	 * on-the-wire decoding.
-	 */
-	return cpu_to_le16(mid);
-}
-
-static inline void
-revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
-{
-	if (server->ops->revert_current_mid)
-		server->ops->revert_current_mid(server, val);
-}
-
-static inline void
-revert_current_mid_from_hdr(struct TCP_Server_Info *server,
-			    const struct smb2_hdr *shdr)
-{
-	unsigned int num = le16_to_cpu(shdr->CreditCharge);
-
-	return revert_current_mid(server, num > 0 ? num : 1);
-}
-
-static inline __u16
-get_mid(const struct smb_hdr *smb)
-{
-	return le16_to_cpu(smb->Mid);
-}
-
-static inline bool
-compare_mid(__u16 mid, const struct smb_hdr *smb)
-{
-	return mid == le16_to_cpu(smb->Mid);
-}
-
-/*
- * When the server supports very large reads and writes via POSIX extensions,
- * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
- * including the RFC1001 length.
- *
- * Note that this might make for "interesting" allocation problems during
- * writeback however as we have to allocate an array of pointers for the
- * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
- *
- * For reads, there is a similar problem as we need to allocate an array
- * of kvecs to handle the receive, though that should only need to be done
- * once.
- */
-#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
-#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
-
-/*
- * When the server doesn't allow large posix writes, only allow a rsize/wsize
- * of 2^17-1 minus the size of the call header. That allows for a read or
- * write up to the maximum size described by RFC1002.
- */
-#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
-#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
-
-#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
-
-/*
- * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
- * those values when posix extensions aren't in force. In actuality here, we
- * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
- * to be ok with the extra byte even though Windows doesn't send writes that
- * are that large.
- *
- * Citation:
- *
- * https://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
- */
-#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
-#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
-
-/*
- * Macros to allow the TCP_Server_Info->net field and related code to drop out
- * when CONFIG_NET_NS isn't set.
- */
-
-#ifdef CONFIG_NET_NS
-
-static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
-{
-	return srv->net;
-}
-
-static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
-{
-	srv->net = net;
-}
-
-#else
-
-static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
-{
-	return &init_net;
-}
-
-static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
-{
-}
-
-#endif
-
-struct cifs_server_iface {
-	struct list_head iface_head;
-	struct kref refcount;
-	size_t speed;
-	unsigned int rdma_capable : 1;
-	unsigned int rss_capable : 1;
-	unsigned int is_active : 1; /* unset if non existent */
-	struct sockaddr_storage sockaddr;
-};
-
-/* release iface when last ref is dropped */
-static inline void
-release_iface(struct kref *ref)
-{
-	struct cifs_server_iface *iface = container_of(ref,
-						       struct cifs_server_iface,
-						       refcount);
-	list_del_init(&iface->iface_head);
-	kfree(iface);
-}
-
-/*
- * compare two interfaces a and b
- * return 0 if everything matches.
- * return 1 if a has higher link speed, or rdma capable, or rss capable
- * return -1 otherwise.
- */
-static inline int
-iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
-{
-	int cmp_ret = 0;
-
-	WARN_ON(!a || !b);
-	if (a->speed == b->speed) {
-		if (a->rdma_capable == b->rdma_capable) {
-			if (a->rss_capable == b->rss_capable) {
-				cmp_ret = memcmp(&a->sockaddr, &b->sockaddr,
-						 sizeof(a->sockaddr));
-				if (!cmp_ret)
-					return 0;
-				else if (cmp_ret > 0)
-					return 1;
-				else
-					return -1;
-			} else if (a->rss_capable > b->rss_capable)
-				return 1;
-			else
-				return -1;
-		} else if (a->rdma_capable > b->rdma_capable)
-			return 1;
-		else
-			return -1;
-	} else if (a->speed > b->speed)
-		return 1;
-	else
-		return -1;
-}
-
-struct cifs_chan {
-	unsigned int in_reconnect : 1; /* if session setup in progress for this channel */
-	struct TCP_Server_Info *server;
-	struct cifs_server_iface *iface; /* interface in use */
-	__u8 signkey[SMB3_SIGN_KEY_SIZE];
-};
-
-/*
- * Session structure.  One of these for each uid session with a particular host
- */
-struct cifs_ses {
-	struct list_head smb_ses_list;
-	struct list_head rlist; /* reconnect list */
-	struct list_head tcon_list;
-	struct cifs_tcon *tcon_ipc;
-	spinlock_t ses_lock;  /* protect anything here that is not protected */
-	struct mutex session_mutex;
-	struct TCP_Server_Info *server;	/* pointer to server info */
-	int ses_count;		/* reference counter */
-	enum ses_status_enum ses_status;  /* updates protected by cifs_tcp_ses_lock */
-	unsigned int overrideSecFlg; /* if non-zero override global sec flags */
-	char *serverOS;		/* name of operating system underlying server */
-	char *serverNOS;	/* name of network operating system of server */
-	char *serverDomain;	/* security realm of server */
-	__u64 Suid;		/* remote smb uid  */
-	kuid_t linux_uid;	/* overriding owner of files on the mount */
-	kuid_t cred_uid;	/* owner of credentials */
-	unsigned int capabilities;
-	char ip_addr[INET6_ADDRSTRLEN + 1]; /* Max ipv6 (or v4) addr string len */
-	char *user_name;	/* must not be null except during init of sess
-				   and after mount option parsing we fill it */
-	char *domainName;
-	char *password;
-	char workstation_name[CIFS_MAX_WORKSTATION_LEN];
-	struct session_key auth_key;
-	struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
-	enum securityEnum sectype; /* what security flavor was specified? */
-	bool sign;		/* is signing required? */
-	bool domainAuto:1;
-	__u16 session_flags;
-	__u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
-	__u8 smb3encryptionkey[SMB3_ENC_DEC_KEY_SIZE];
-	__u8 smb3decryptionkey[SMB3_ENC_DEC_KEY_SIZE];
-	__u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
-
-	/*
-	 * Network interfaces available on the server this session is
-	 * connected to.
-	 *
-	 * Other channels can be opened by connecting and binding this
-	 * session to interfaces from this list.
-	 *
-	 * iface_lock should be taken when accessing any of these fields
-	 */
-	spinlock_t iface_lock;
-	/* ========= begin: protected by iface_lock ======== */
-	struct list_head iface_list;
-	size_t iface_count;
-	unsigned long iface_last_update; /* jiffies */
-	/* ========= end: protected by iface_lock ======== */
-
-	spinlock_t chan_lock;
-	/* ========= begin: protected by chan_lock ======== */
-#define CIFS_MAX_CHANNELS 16
-#define CIFS_ALL_CHANNELS_SET(ses)	\
-	((1UL << (ses)->chan_count) - 1)
-#define CIFS_ALL_CHANS_GOOD(ses)		\
-	(!(ses)->chans_need_reconnect)
-#define CIFS_ALL_CHANS_NEED_RECONNECT(ses)	\
-	((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses))
-#define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses)	\
-	((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses))
-#define CIFS_CHAN_NEEDS_RECONNECT(ses, index)	\
-	test_bit((index), &(ses)->chans_need_reconnect)
-#define CIFS_CHAN_IN_RECONNECT(ses, index)	\
-	((ses)->chans[(index)].in_reconnect)
-
-	struct cifs_chan chans[CIFS_MAX_CHANNELS];
-	size_t chan_count;
-	size_t chan_max;
-	atomic_t chan_seq; /* round robin state */
-
-	/*
-	 * chans_need_reconnect is a bitmap indicating which of the channels
-	 * under this smb session needs to be reconnected.
-	 * If not multichannel session, only one bit will be used.
-	 *
-	 * We will ask for sess and tcon reconnection only if all the
-	 * channels are marked for needing reconnection. This will
-	 * enable the sessions on top to continue to live till any
-	 * of the channels below are active.
-	 */
-	unsigned long chans_need_reconnect;
-	/* ========= end: protected by chan_lock ======== */
-	struct cifs_ses *dfs_root_ses;
-};
-
-static inline bool
-cap_unix(struct cifs_ses *ses)
-{
-	return ses->server->vals->cap_unix & ses->capabilities;
-}
-
-/*
- * common struct for holding inode info when searching for or updating an
- * inode with new info
- */
-
-#define CIFS_FATTR_DFS_REFERRAL		0x1
-#define CIFS_FATTR_DELETE_PENDING	0x2
-#define CIFS_FATTR_NEED_REVAL		0x4
-#define CIFS_FATTR_INO_COLLISION	0x8
-#define CIFS_FATTR_UNKNOWN_NLINK	0x10
-#define CIFS_FATTR_FAKE_ROOT_INO	0x20
-
-struct cifs_fattr {
-	u32		cf_flags;
-	u32		cf_cifsattrs;
-	u64		cf_uniqueid;
-	u64		cf_eof;
-	u64		cf_bytes;
-	u64		cf_createtime;
-	kuid_t		cf_uid;
-	kgid_t		cf_gid;
-	umode_t		cf_mode;
-	dev_t		cf_rdev;
-	unsigned int	cf_nlink;
-	unsigned int	cf_dtype;
-	struct timespec64 cf_atime;
-	struct timespec64 cf_mtime;
-	struct timespec64 cf_ctime;
-	u32             cf_cifstag;
-	char            *cf_symlink_target;
-};
-
-/*
- * there is one of these for each connection to a resource on a particular
- * session
- */
-struct cifs_tcon {
-	struct list_head tcon_list;
-	int tc_count;
-	struct list_head rlist; /* reconnect list */
-	spinlock_t tc_lock;  /* protect anything here that is not protected */
-	atomic_t num_local_opens;  /* num of all opens including disconnected */
-	atomic_t num_remote_opens; /* num of all network opens on server */
-	struct list_head openFileList;
-	spinlock_t open_file_lock; /* protects list above */
-	struct cifs_ses *ses;	/* pointer to session associated with */
-	char tree_name[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
-	char *nativeFileSystem;
-	char *password;		/* for share-level security */
-	__u32 tid;		/* The 4 byte tree id */
-	__u16 Flags;		/* optional support bits */
-	enum tid_status_enum status;
-	atomic_t num_smbs_sent;
-	union {
-		struct {
-			atomic_t num_writes;
-			atomic_t num_reads;
-			atomic_t num_flushes;
-			atomic_t num_oplock_brks;
-			atomic_t num_opens;
-			atomic_t num_closes;
-			atomic_t num_deletes;
-			atomic_t num_mkdirs;
-			atomic_t num_posixopens;
-			atomic_t num_posixmkdirs;
-			atomic_t num_rmdirs;
-			atomic_t num_renames;
-			atomic_t num_t2renames;
-			atomic_t num_ffirst;
-			atomic_t num_fnext;
-			atomic_t num_fclose;
-			atomic_t num_hardlinks;
-			atomic_t num_symlinks;
-			atomic_t num_locks;
-			atomic_t num_acl_get;
-			atomic_t num_acl_set;
-		} cifs_stats;
-		struct {
-			atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
-			atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
-		} smb2_stats;
-	} stats;
-	__u64    bytes_read;
-	__u64    bytes_written;
-	spinlock_t stat_lock;  /* protects the two fields above */
-	FILE_SYSTEM_DEVICE_INFO fsDevInfo;
-	FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
-	FILE_SYSTEM_UNIX_INFO fsUnixInfo;
-	bool ipc:1;   /* set if connection to IPC$ share (always also pipe) */
-	bool pipe:1;  /* set if connection to pipe share */
-	bool print:1; /* set if connection to printer share */
-	bool retry:1;
-	bool nocase:1;
-	bool nohandlecache:1; /* if strange server resource prob can turn off */
-	bool nodelete:1;
-	bool seal:1;      /* transport encryption for this mounted share */
-	bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
-				for this mount even if server would support */
-	bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
-	bool local_lease:1; /* check leases (only) on local system not remote */
-	bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
-	bool broken_sparse_sup; /* if server or share does not support sparse */
-	bool need_reconnect:1; /* connection reset, tid now invalid */
-	bool need_reopen_files:1; /* need to reopen tcon file handles */
-	bool use_resilient:1; /* use resilient instead of durable handles */
-	bool use_persistent:1; /* use persistent instead of durable handles */
-	bool no_lease:1;    /* Do not request leases on files or directories */
-	bool use_witness:1; /* use witness protocol */
-	__le32 capabilities;
-	__u32 share_flags;
-	__u32 maximal_access;
-	__u32 vol_serial_number;
-	__le64 vol_create_time;
-	__u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
-	__u32 handle_timeout; /* persistent and durable handle timeout in ms */
-	__u32 ss_flags;		/* sector size flags */
-	__u32 perf_sector_size; /* best sector size for perf */
-	__u32 max_chunks;
-	__u32 max_bytes_chunk;
-	__u32 max_bytes_copy;
-#ifdef CONFIG_CIFS_FSCACHE
-	u64 resource_id;		/* server resource id */
-	struct fscache_volume *fscache;	/* cookie for share */
-#endif
-	struct list_head pending_opens;	/* list of incomplete opens */
-	struct cached_fids *cfids;
-	/* BB add field for back pointer to sb struct(s)? */
-#ifdef CONFIG_CIFS_DFS_UPCALL
-	struct list_head dfs_ses_list;
-	struct delayed_work dfs_cache_work;
-#endif
-	struct delayed_work	query_interfaces; /* query interfaces workqueue job */
-};
-
-/*
- * This is a refcounted and timestamped container for a tcon pointer. The
- * container holds a tcon reference. It is considered safe to free one of
- * these when the tl_count goes to 0. The tl_time is the time of the last
- * "get" on the container.
- */
-struct tcon_link {
-	struct rb_node		tl_rbnode;
-	kuid_t			tl_uid;
-	unsigned long		tl_flags;
-#define TCON_LINK_MASTER	0
-#define TCON_LINK_PENDING	1
-#define TCON_LINK_IN_TREE	2
-	unsigned long		tl_time;
-	atomic_t		tl_count;
-	struct cifs_tcon	*tl_tcon;
-};
-
-extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
-extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
-
-static inline struct cifs_tcon *
-tlink_tcon(struct tcon_link *tlink)
-{
-	return tlink->tl_tcon;
-}
-
-static inline struct tcon_link *
-cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
-{
-	return cifs_sb->master_tlink;
-}
-
-extern void cifs_put_tlink(struct tcon_link *tlink);
-
-static inline struct tcon_link *
-cifs_get_tlink(struct tcon_link *tlink)
-{
-	if (tlink && !IS_ERR(tlink))
-		atomic_inc(&tlink->tl_count);
-	return tlink;
-}
-
-/* This function is always expected to succeed */
-extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
-
-#define CIFS_OPLOCK_NO_CHANGE 0xfe
-
-struct cifs_pending_open {
-	struct list_head olist;
-	struct tcon_link *tlink;
-	__u8 lease_key[16];
-	__u32 oplock;
-};
-
-struct cifs_deferred_close {
-	struct list_head dlist;
-	struct tcon_link *tlink;
-	__u16  netfid;
-	__u64  persistent_fid;
-	__u64  volatile_fid;
-};
-
-/*
- * This info hangs off the cifsFileInfo structure, pointed to by llist.
- * This is used to track byte stream locks on the file
- */
-struct cifsLockInfo {
-	struct list_head llist;	/* pointer to next cifsLockInfo */
-	struct list_head blist; /* pointer to locks blocked on this */
-	wait_queue_head_t block_q;
-	__u64 offset;
-	__u64 length;
-	__u32 pid;
-	__u16 type;
-	__u16 flags;
-};
-
-/*
- * One of these for each open instance of a file
- */
-struct cifs_search_info {
-	loff_t index_of_last_entry;
-	__u16 entries_in_buffer;
-	__u16 info_level;
-	__u32 resume_key;
-	char *ntwrk_buf_start;
-	char *srch_entries_start;
-	char *last_entry;
-	const char *presume_name;
-	unsigned int resume_name_len;
-	bool endOfSearch:1;
-	bool emptyDir:1;
-	bool unicode:1;
-	bool smallBuf:1; /* so we know which buf_release function to call */
-};
-
-#define ACL_NO_MODE	((umode_t)(-1))
-struct cifs_open_parms {
-	struct cifs_tcon *tcon;
-	struct cifs_sb_info *cifs_sb;
-	int disposition;
-	int desired_access;
-	int create_options;
-	const char *path;
-	struct cifs_fid *fid;
-	umode_t mode;
-	bool reconnect:1;
-};
-
-struct cifs_fid {
-	__u16 netfid;
-	__u64 persistent_fid;	/* persist file id for smb2 */
-	__u64 volatile_fid;	/* volatile file id for smb2 */
-	__u8 lease_key[SMB2_LEASE_KEY_SIZE];	/* lease key for smb2 */
-	__u8 create_guid[16];
-	__u32 access;
-	struct cifs_pending_open *pending_open;
-	unsigned int epoch;
-#ifdef CONFIG_CIFS_DEBUG2
-	__u64 mid;
-#endif /* CIFS_DEBUG2 */
-	bool purge_cache;
-};
-
-struct cifs_fid_locks {
-	struct list_head llist;
-	struct cifsFileInfo *cfile;	/* fid that owns locks */
-	struct list_head locks;		/* locks held by fid above */
-};
-
-struct cifsFileInfo {
-	/* following two lists are protected by tcon->open_file_lock */
-	struct list_head tlist;	/* pointer to next fid owned by tcon */
-	struct list_head flist;	/* next fid (file instance) for this inode */
-	/* lock list below protected by cifsi->lock_sem */
-	struct cifs_fid_locks *llist;	/* brlocks held by this fid */
-	kuid_t uid;		/* allows finding which FileInfo structure */
-	__u32 pid;		/* process id who opened file */
-	struct cifs_fid fid;	/* file id from remote */
-	struct list_head rlist; /* reconnect list */
-	/* BB add lock scope info here if needed */
-	/* lock scope id (0 if none) */
-	struct dentry *dentry;
-	struct tcon_link *tlink;
-	unsigned int f_flags;
-	bool invalidHandle:1;	/* file closed via session abend */
-	bool swapfile:1;
-	bool oplock_break_cancelled:1;
-	unsigned int oplock_epoch; /* epoch from the lease break */
-	__u32 oplock_level; /* oplock/lease level from the lease break */
-	int count;
-	spinlock_t file_info_lock; /* protects four flag/count fields above */
-	struct mutex fh_mutex; /* prevents reopen race after dead ses*/
-	struct cifs_search_info srch_inf;
-	struct work_struct oplock_break; /* work for oplock breaks */
-	struct work_struct put; /* work for the final part of _put */
-	struct delayed_work deferred;
-	bool deferred_close_scheduled; /* Flag to indicate close is scheduled */
-	char *symlink_target;
-};
-
-struct cifs_io_parms {
-	__u16 netfid;
-	__u64 persistent_fid;	/* persist file id for smb2 */
-	__u64 volatile_fid;	/* volatile file id for smb2 */
-	__u32 pid;
-	__u64 offset;
-	unsigned int length;
-	struct cifs_tcon *tcon;
-	struct TCP_Server_Info *server;
-};
-
-struct cifs_aio_ctx {
-	struct kref		refcount;
-	struct list_head	list;
-	struct mutex		aio_mutex;
-	struct completion	done;
-	struct iov_iter		iter;
-	struct kiocb		*iocb;
-	struct cifsFileInfo	*cfile;
-	struct bio_vec		*bv;
-	loff_t			pos;
-	unsigned int		nr_pinned_pages;
-	ssize_t			rc;
-	unsigned int		len;
-	unsigned int		total_len;
-	unsigned int		bv_need_unpin;	/* If ->bv[] needs unpinning */
-	bool			should_dirty;
-	/*
-	 * Indicates if this aio_ctx is for direct_io,
-	 * If yes, iter is a copy of the user passed iov_iter
-	 */
-	bool			direct_io;
-};
-
-/* asynchronous read support */
-struct cifs_readdata {
-	struct kref			refcount;
-	struct list_head		list;
-	struct completion		done;
-	struct cifsFileInfo		*cfile;
-	struct address_space		*mapping;
-	struct cifs_aio_ctx		*ctx;
-	__u64				offset;
-	ssize_t				got_bytes;
-	unsigned int			bytes;
-	pid_t				pid;
-	int				result;
-	struct work_struct		work;
-	struct iov_iter			iter;
-	struct kvec			iov[2];
-	struct TCP_Server_Info		*server;
-#ifdef CONFIG_CIFS_SMB_DIRECT
-	struct smbd_mr			*mr;
-#endif
-	struct cifs_credits		credits;
-};
-
-/* asynchronous write support */
-struct cifs_writedata {
-	struct kref			refcount;
-	struct list_head		list;
-	struct completion		done;
-	enum writeback_sync_modes	sync_mode;
-	struct work_struct		work;
-	struct cifsFileInfo		*cfile;
-	struct cifs_aio_ctx		*ctx;
-	struct iov_iter			iter;
-	struct bio_vec			*bv;
-	__u64				offset;
-	pid_t				pid;
-	unsigned int			bytes;
-	int				result;
-	struct TCP_Server_Info		*server;
-#ifdef CONFIG_CIFS_SMB_DIRECT
-	struct smbd_mr			*mr;
-#endif
-	struct cifs_credits		credits;
-};
-
-/*
- * Take a reference on the file private data. Must be called with
- * cfile->file_info_lock held.
- */
-static inline void
-cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
-{
-	++cifs_file->count;
-}
-
-struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
-void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
-		       bool offload);
-void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
-
-#define CIFS_CACHE_READ_FLG	1
-#define CIFS_CACHE_HANDLE_FLG	2
-#define CIFS_CACHE_RH_FLG	(CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
-#define CIFS_CACHE_WRITE_FLG	4
-#define CIFS_CACHE_RW_FLG	(CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
-#define CIFS_CACHE_RHW_FLG	(CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
-
-#define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE))
-#define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
-#define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->netfs.inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE))
-
-/*
- * One of these for each file inode
- */
-
-struct cifsInodeInfo {
-	struct netfs_inode netfs; /* Netfslib context and vfs inode */
-	bool can_cache_brlcks;
-	struct list_head llist;	/* locks helb by this inode */
-	/*
-	 * NOTE: Some code paths call down_read(lock_sem) twice, so
-	 * we must always use cifs_down_write() instead of down_write()
-	 * for this semaphore to avoid deadlocks.
-	 */
-	struct rw_semaphore lock_sem;	/* protect the fields above */
-	/* BB add in lists for dirty pages i.e. write caching info for oplock */
-	struct list_head openFileList;
-	spinlock_t	open_file_lock;	/* protects openFileList */
-	__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
-	unsigned int oplock;		/* oplock/lease level we have */
-	unsigned int epoch;		/* used to track lease state changes */
-#define CIFS_INODE_PENDING_OPLOCK_BREAK   (0) /* oplock break in progress */
-#define CIFS_INODE_PENDING_WRITERS	  (1) /* Writes in progress */
-#define CIFS_INODE_FLAG_UNUSED		  (2) /* Unused flag */
-#define CIFS_INO_DELETE_PENDING		  (3) /* delete pending on server */
-#define CIFS_INO_INVALID_MAPPING	  (4) /* pagecache is invalid */
-#define CIFS_INO_LOCK			  (5) /* lock bit for synchronization */
-#define CIFS_INO_MODIFIED_ATTR            (6) /* Indicate change in mtime/ctime */
-#define CIFS_INO_CLOSE_ON_LOCK            (7) /* Not to defer the close when lock is set */
-	unsigned long flags;
-	spinlock_t writers_lock;
-	unsigned int writers;		/* Number of writers on this inode */
-	unsigned long time;		/* jiffies of last update of inode */
-	u64  server_eof;		/* current file size on server -- protected by i_lock */
-	u64  uniqueid;			/* server inode number */
-	u64  createtime;		/* creation time on server */
-	__u8 lease_key[SMB2_LEASE_KEY_SIZE];	/* lease key for this inode */
-	struct list_head deferred_closes; /* list of deferred closes */
-	spinlock_t deferred_lock; /* protection on deferred list */
-	bool lease_granted; /* Flag to indicate whether lease or oplock is granted. */
-	char *symlink_target;
-};
-
-static inline struct cifsInodeInfo *
-CIFS_I(struct inode *inode)
-{
-	return container_of(inode, struct cifsInodeInfo, netfs.inode);
-}
-
-static inline struct cifs_sb_info *
-CIFS_SB(struct super_block *sb)
-{
-	return sb->s_fs_info;
-}
-
-static inline struct cifs_sb_info *
-CIFS_FILE_SB(struct file *file)
-{
-	return CIFS_SB(file_inode(file)->i_sb);
-}
-
-static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
-{
-	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
-		return '/';
-	else
-		return '\\';
-}
-
-static inline void
-convert_delimiter(char *path, char delim)
-{
-	char old_delim, *pos;
-
-	if (delim == '/')
-		old_delim = '\\';
-	else
-		old_delim = '/';
-
-	pos = path;
-	while ((pos = strchr(pos, old_delim)))
-		*pos = delim;
-}
-
-#define cifs_stats_inc atomic_inc
-
-static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
-					    unsigned int bytes)
-{
-	if (bytes) {
-		spin_lock(&tcon->stat_lock);
-		tcon->bytes_written += bytes;
-		spin_unlock(&tcon->stat_lock);
-	}
-}
-
-static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
-					 unsigned int bytes)
-{
-	spin_lock(&tcon->stat_lock);
-	tcon->bytes_read += bytes;
-	spin_unlock(&tcon->stat_lock);
-}
-
-
-/*
- * This is the prototype for the mid receive function. This function is for
- * receiving the rest of the SMB frame, starting with the WordCount (which is
- * just after the MID in struct smb_hdr). Note:
- *
- * - This will be called by cifsd, with no locks held.
- * - The mid will still be on the pending_mid_q.
- * - mid->resp_buf will point to the current buffer.
- *
- * Returns zero on a successful receive, or an error. The receive state in
- * the TCP_Server_Info will also be updated.
- */
-typedef int (mid_receive_t)(struct TCP_Server_Info *server,
-			    struct mid_q_entry *mid);
-
-/*
- * This is the prototype for the mid callback function. This is called once the
- * mid has been received off of the socket. When creating one, take special
- * care to avoid deadlocks. Things to bear in mind:
- *
- * - it will be called by cifsd, with no locks held
- * - the mid will be removed from any lists
- */
-typedef void (mid_callback_t)(struct mid_q_entry *mid);
-
-/*
- * This is the protopyte for mid handle function. This is called once the mid
- * has been recognized after decryption of the message.
- */
-typedef int (mid_handle_t)(struct TCP_Server_Info *server,
-			    struct mid_q_entry *mid);
-
-/* one of these for every pending CIFS request to the server */
-struct mid_q_entry {
-	struct list_head qhead;	/* mids waiting on reply from this server */
-	struct kref refcount;
-	struct TCP_Server_Info *server;	/* server corresponding to this mid */
-	__u64 mid;		/* multiplex id */
-	__u16 credits;		/* number of credits consumed by this mid */
-	__u16 credits_received;	/* number of credits from the response */
-	__u32 pid;		/* process id */
-	__u32 sequence_number;  /* for CIFS signing */
-	unsigned long when_alloc;  /* when mid was created */
-#ifdef CONFIG_CIFS_STATS2
-	unsigned long when_sent; /* time when smb send finished */
-	unsigned long when_received; /* when demux complete (taken off wire) */
-#endif
-	mid_receive_t *receive; /* call receive callback */
-	mid_callback_t *callback; /* call completion callback */
-	mid_handle_t *handle; /* call handle mid callback */
-	void *callback_data;	  /* general purpose pointer for callback */
-	struct task_struct *creator;
-	void *resp_buf;		/* pointer to received SMB header */
-	unsigned int resp_buf_size;
-	int mid_state;	/* wish this were enum but can not pass to wait_event */
-	unsigned int mid_flags;
-	__le16 command;		/* smb command code */
-	unsigned int optype;	/* operation type */
-	bool large_buf:1;	/* if valid response, is pointer to large buf */
-	bool multiRsp:1;	/* multiple trans2 responses for one request  */
-	bool multiEnd:1;	/* both received */
-	bool decrypted:1;	/* decrypted entry */
-};
-
-struct close_cancelled_open {
-	struct cifs_fid         fid;
-	struct cifs_tcon        *tcon;
-	struct work_struct      work;
-	__u64 mid;
-	__u16 cmd;
-};
-
-/*	Make code in transport.c a little cleaner by moving
-	update of optional stats into function below */
-static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
-{
-	atomic_inc(&server->in_send);
-}
-
-static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
-{
-	atomic_dec(&server->in_send);
-}
-
-static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
-{
-	atomic_inc(&server->num_waiters);
-}
-
-static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
-{
-	atomic_dec(&server->num_waiters);
-}
-
-#ifdef CONFIG_CIFS_STATS2
-static inline void cifs_save_when_sent(struct mid_q_entry *mid)
-{
-	mid->when_sent = jiffies;
-}
-#else
-static inline void cifs_save_when_sent(struct mid_q_entry *mid)
-{
-}
-#endif
-
-/* for pending dnotify requests */
-struct dir_notify_req {
-	struct list_head lhead;
-	__le16 Pid;
-	__le16 PidHigh;
-	__u16 Mid;
-	__u16 Tid;
-	__u16 Uid;
-	__u16 netfid;
-	__u32 filter; /* CompletionFilter (for multishot) */
-	int multishot;
-	struct file *pfile;
-};
-
-struct dfs_info3_param {
-	int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
-	int path_consumed;
-	int server_type;
-	int ref_flag;
-	char *path_name;
-	char *node_name;
-	int ttl;
-};
-
-struct file_list {
-	struct list_head list;
-	struct cifsFileInfo *cfile;
-};
-
-struct cifs_mount_ctx {
-	struct cifs_sb_info *cifs_sb;
-	struct smb3_fs_context *fs_ctx;
-	unsigned int xid;
-	struct TCP_Server_Info *server;
-	struct cifs_ses *ses;
-	struct cifs_tcon *tcon;
-	struct list_head dfs_ses_list;
-};
-
-static inline void free_dfs_info_param(struct dfs_info3_param *param)
-{
-	if (param) {
-		kfree(param->path_name);
-		kfree(param->node_name);
-	}
-}
-
-static inline void free_dfs_info_array(struct dfs_info3_param *param,
-				       int number_of_items)
-{
-	int i;
-
-	if ((number_of_items == 0) || (param == NULL))
-		return;
-	for (i = 0; i < number_of_items; i++) {
-		kfree(param[i].path_name);
-		kfree(param[i].node_name);
-	}
-	kfree(param);
-}
-
-static inline bool is_interrupt_error(int error)
-{
-	switch (error) {
-	case -EINTR:
-	case -ERESTARTSYS:
-	case -ERESTARTNOHAND:
-	case -ERESTARTNOINTR:
-		return true;
-	}
-	return false;
-}
-
-static inline bool is_retryable_error(int error)
-{
-	if (is_interrupt_error(error) || error == -EAGAIN)
-		return true;
-	return false;
-}
-
-
-/* cifs_get_writable_file() flags */
-#define FIND_WR_ANY         0
-#define FIND_WR_FSUID_ONLY  1
-#define FIND_WR_WITH_DELETE 2
-
-#define   MID_FREE 0
-#define   MID_REQUEST_ALLOCATED 1
-#define   MID_REQUEST_SUBMITTED 2
-#define   MID_RESPONSE_RECEIVED 4
-#define   MID_RETRY_NEEDED      8 /* session closed while this request out */
-#define   MID_RESPONSE_MALFORMED 0x10
-#define   MID_SHUTDOWN		 0x20
-
-/* Flags */
-#define   MID_WAIT_CANCELLED	 1 /* Cancelled while waiting for response */
-#define   MID_DELETED            2 /* Mid has been dequeued/deleted */
-
-/* Types of response buffer returned from SendReceive2 */
-#define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
-#define   CIFS_SMALL_BUFFER     1
-#define   CIFS_LARGE_BUFFER     2
-#define   CIFS_IOVEC            4    /* array of response buffers */
-
-/* Type of Request to SendReceive2 */
-#define   CIFS_BLOCKING_OP      1    /* operation can block */
-#define   CIFS_NON_BLOCKING     2    /* do not block waiting for credits */
-#define   CIFS_TIMEOUT_MASK 0x003    /* only one of above set in req */
-#define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
-#define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
-#define   CIFS_NO_RSP_BUF   0x040    /* no response buffer required */
-
-/* Type of request operation */
-#define   CIFS_ECHO_OP            0x080  /* echo request */
-#define   CIFS_OBREAK_OP          0x0100 /* oplock break request */
-#define   CIFS_NEG_OP             0x0200 /* negotiate request */
-#define   CIFS_CP_CREATE_CLOSE_OP 0x0400 /* compound create+close request */
-/* Lower bitmask values are reserved by others below. */
-#define   CIFS_SESS_OP            0x2000 /* session setup request */
-#define   CIFS_OP_MASK            0x2780 /* mask request type */
-
-#define   CIFS_HAS_CREDITS        0x0400 /* already has credits */
-#define   CIFS_TRANSFORM_REQ      0x0800 /* transform request before sending */
-#define   CIFS_NO_SRV_RSP         0x1000 /* there is no server response */
-
-/* Security Flags: indicate type of session setup needed */
-#define   CIFSSEC_MAY_SIGN	0x00001
-#define   CIFSSEC_MAY_NTLMV2	0x00004
-#define   CIFSSEC_MAY_KRB5	0x00008
-#define   CIFSSEC_MAY_SEAL	0x00040 /* not supported yet */
-#define   CIFSSEC_MAY_NTLMSSP	0x00080 /* raw ntlmssp with ntlmv2 */
-
-#define   CIFSSEC_MUST_SIGN	0x01001
-/* note that only one of the following can be set so the
-result of setting MUST flags more than once will be to
-require use of the stronger protocol */
-#define   CIFSSEC_MUST_NTLMV2	0x04004
-#define   CIFSSEC_MUST_KRB5	0x08008
-#ifdef CONFIG_CIFS_UPCALL
-#define   CIFSSEC_MASK          0x8F08F /* flags supported if no weak allowed */
-#else
-#define	  CIFSSEC_MASK          0x87087 /* flags supported if no weak allowed */
-#endif /* UPCALL */
-#define   CIFSSEC_MUST_SEAL	0x40040 /* not supported yet */
-#define   CIFSSEC_MUST_NTLMSSP	0x80080 /* raw ntlmssp with ntlmv2 */
-
-#define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
-#define   CIFSSEC_MAX (CIFSSEC_MUST_NTLMV2)
-#define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
-/*
- *****************************************************************
- * All constants go here
- *****************************************************************
- */
-
-#define UID_HASH (16)
-
-/*
- * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
- * following to be declared.
- */
-
-/****************************************************************************
- * Here are all the locks (spinlock, mutex, semaphore) in cifs.ko, arranged according
- * to the locking order. i.e. if two locks are to be held together, the lock that
- * appears higher in this list needs to be taken before the other.
- *
- * If you hold a lock that is lower in this list, and you need to take a higher lock
- * (or if you think that one of the functions that you're calling may need to), first
- * drop the lock you hold, pick up the higher lock, then the lower one. This will
- * ensure that locks are picked up only in one direction in the below table
- * (top to bottom).
- *
- * Also, if you expect a function to be called with a lock held, explicitly document
- * this in the comments on top of your function definition.
- *
- * And also, try to keep the critical sections (lock hold time) to be as minimal as
- * possible. Blocking / calling other functions with a lock held always increase
- * the risk of a possible deadlock.
- *
- * Following this rule will avoid unnecessary deadlocks, which can get really hard to
- * debug. Also, any new lock that you introduce, please add to this list in the correct
- * order.
- *
- * Please populate this list whenever you introduce new locks in your changes. Or in
- * case I've missed some existing locks. Please ensure that it's added in the list
- * based on the locking order expected.
- *
- * =====================================================================================
- * Lock				Protects			Initialization fn
- * =====================================================================================
- * vol_list_lock
- * vol_info->ctx_lock		vol_info->ctx
- * cifs_sb_info->tlink_tree_lock	cifs_sb_info->tlink_tree	cifs_setup_cifs_sb
- * TCP_Server_Info->		TCP_Server_Info			cifs_get_tcp_session
- * reconnect_mutex
- * TCP_Server_Info->srv_mutex	TCP_Server_Info			cifs_get_tcp_session
- * cifs_ses->session_mutex		cifs_ses		sesInfoAlloc
- *				cifs_tcon
- * cifs_tcon->open_file_lock	cifs_tcon->openFileList		tconInfoAlloc
- *				cifs_tcon->pending_opens
- * cifs_tcon->stat_lock		cifs_tcon->bytes_read		tconInfoAlloc
- *				cifs_tcon->bytes_written
- * cifs_tcp_ses_lock		cifs_tcp_ses_list		sesInfoAlloc
- * GlobalMid_Lock		GlobalMaxActiveXid		init_cifs
- *				GlobalCurrentXid
- *				GlobalTotalActiveXid
- * TCP_Server_Info->srv_lock	(anything in struct not protected by another lock and can change)
- * TCP_Server_Info->mid_lock	TCP_Server_Info->pending_mid_q	cifs_get_tcp_session
- *				->CurrentMid
- *				(any changes in mid_q_entry fields)
- * TCP_Server_Info->req_lock	TCP_Server_Info->in_flight	cifs_get_tcp_session
- *				->credits
- *				->echo_credits
- *				->oplock_credits
- *				->reconnect_instance
- * cifs_ses->ses_lock		(anything that is not protected by another lock and can change)
- * cifs_ses->iface_lock		cifs_ses->iface_list		sesInfoAlloc
- *				->iface_count
- *				->iface_last_update
- * cifs_ses->chan_lock		cifs_ses->chans
- *				->chans_need_reconnect
- *				->chans_in_reconnect
- * cifs_tcon->tc_lock		(anything that is not protected by another lock and can change)
- * cifsInodeInfo->open_file_lock	cifsInodeInfo->openFileList	cifs_alloc_inode
- * cifsInodeInfo->writers_lock	cifsInodeInfo->writers		cifsInodeInfo_alloc
- * cifsInodeInfo->lock_sem	cifsInodeInfo->llist		cifs_init_once
- *				->can_cache_brlcks
- * cifsInodeInfo->deferred_lock	cifsInodeInfo->deferred_closes	cifsInodeInfo_alloc
- * cached_fid->fid_mutex		cifs_tcon->crfid		tconInfoAlloc
- * cifsFileInfo->fh_mutex		cifsFileInfo			cifs_new_fileinfo
- * cifsFileInfo->file_info_lock	cifsFileInfo->count		cifs_new_fileinfo
- *				->invalidHandle			initiate_cifs_search
- *				->oplock_break_cancelled
- * cifs_aio_ctx->aio_mutex		cifs_aio_ctx			cifs_aio_ctx_alloc
- ****************************************************************************/
-
-#ifdef DECLARE_GLOBALS_HERE
-#define GLOBAL_EXTERN
-#else
-#define GLOBAL_EXTERN extern
-#endif
-
-/*
- * the list of TCP_Server_Info structures, ie each of the sockets
- * connecting our client to a distinct server (ip address), is
- * chained together by cifs_tcp_ses_list. The list of all our SMB
- * sessions (and from that the tree connections) can be found
- * by iterating over cifs_tcp_ses_list
- */
-extern struct list_head		cifs_tcp_ses_list;
-
-/*
- * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
- * tcp session, and the list of tcon's per smb session. It also protects
- * the reference counters for the server, smb session, and tcon.
- * generally the locks should be taken in order tcp_ses_lock before
- * tcon->open_file_lock and that before file->file_info_lock since the
- * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
- */
-extern spinlock_t		cifs_tcp_ses_lock;
-
-/*
- * Global transaction id (XID) information
- */
-extern unsigned int GlobalCurrentXid;	/* protected by GlobalMid_Sem */
-extern unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
-extern unsigned int GlobalMaxActiveXid;	/* prot by GlobalMid_Sem */
-extern spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */
-
-/*
- *  Global counters, updated atomically
- */
-extern atomic_t sesInfoAllocCount;
-extern atomic_t tconInfoAllocCount;
-extern atomic_t tcpSesNextId;
-extern atomic_t tcpSesAllocCount;
-extern atomic_t tcpSesReconnectCount;
-extern atomic_t tconInfoReconnectCount;
-
-/* Various Debug counters */
-extern atomic_t buf_alloc_count;	/* current number allocated  */
-extern atomic_t small_buf_alloc_count;
-#ifdef CONFIG_CIFS_STATS2
-extern atomic_t total_buf_alloc_count; /* total allocated over all time */
-extern atomic_t total_small_buf_alloc_count;
-extern unsigned int slow_rsp_threshold; /* number of secs before logging */
-#endif
-
-/* Misc globals */
-extern bool enable_oplocks; /* enable or disable oplocks */
-extern bool lookupCacheEnabled;
-extern unsigned int global_secflags;	/* if on, session setup sent
-				with more secure ntlmssp2 challenge/resp */
-extern unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
-extern bool enable_gcm_256; /* allow optional negotiate of strongest signing (aes-gcm-256) */
-extern bool require_gcm_256; /* require use of strongest signing (aes-gcm-256) */
-extern bool enable_negotiate_signing; /* request use of faster (GMAC) signing if available */
-extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
-extern unsigned int CIFSMaxBufSize;  /* max size not including hdr */
-extern unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
-extern unsigned int cifs_min_small;  /* min size of small buf pool */
-extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
-extern bool disable_legacy_dialects;  /* forbid vers=1.0 and vers=2.0 mounts */
-extern atomic_t mid_count;
-
-void cifs_oplock_break(struct work_struct *work);
-void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
-void smb2_deferred_work_close(struct work_struct *work);
-
-extern const struct slow_work_ops cifs_oplock_break_ops;
-extern struct workqueue_struct *cifsiod_wq;
-extern struct workqueue_struct *decrypt_wq;
-extern struct workqueue_struct *fileinfo_put_wq;
-extern struct workqueue_struct *cifsoplockd_wq;
-extern struct workqueue_struct *deferredclose_wq;
-extern __u32 cifs_lock_secret;
-
-extern mempool_t *cifs_mid_poolp;
-
-/* Operations for different SMB versions */
-#define SMB1_VERSION_STRING	"1.0"
-#define SMB20_VERSION_STRING    "2.0"
-#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
-extern struct smb_version_operations smb1_operations;
-extern struct smb_version_values smb1_values;
-extern struct smb_version_operations smb20_operations;
-extern struct smb_version_values smb20_values;
-#endif /* CIFS_ALLOW_INSECURE_LEGACY */
-#define SMB21_VERSION_STRING	"2.1"
-extern struct smb_version_operations smb21_operations;
-extern struct smb_version_values smb21_values;
-#define SMBDEFAULT_VERSION_STRING "default"
-extern struct smb_version_values smbdefault_values;
-#define SMB3ANY_VERSION_STRING "3"
-extern struct smb_version_values smb3any_values;
-#define SMB30_VERSION_STRING	"3.0"
-extern struct smb_version_operations smb30_operations;
-extern struct smb_version_values smb30_values;
-#define SMB302_VERSION_STRING	"3.02"
-#define ALT_SMB302_VERSION_STRING "3.0.2"
-/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
-extern struct smb_version_values smb302_values;
-#define SMB311_VERSION_STRING	"3.1.1"
-#define ALT_SMB311_VERSION_STRING "3.11"
-extern struct smb_version_operations smb311_operations;
-extern struct smb_version_values smb311_values;
-
-static inline char *get_security_type_str(enum securityEnum sectype)
-{
-	switch (sectype) {
-	case RawNTLMSSP:
-		return "RawNTLMSSP";
-	case Kerberos:
-		return "Kerberos";
-	case NTLMv2:
-		return "NTLMv2";
-	default:
-		return "Unknown";
-	}
-}
-
-static inline bool is_smb1_server(struct TCP_Server_Info *server)
-{
-	return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
-}
-
-static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
-{
-	/*
-	 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
-	 * Subsystem Notifies That a Share Is a DFS Share.
-	 *
-	 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
-	 * Application Updates a Share.
-	 */
-	if (!tcon || !tcon->ses || !tcon->ses->server)
-		return false;
-	return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
-		tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
-}
-
-static inline bool cifs_is_referral_server(struct cifs_tcon *tcon,
-					   const struct dfs_info3_param *ref)
-{
-	/*
-	 * Check if all targets are capable of handling DFS referrals as per
-	 * MS-DFSC 2.2.4 RESP_GET_DFS_REFERRAL.
-	 */
-	return is_tcon_dfs(tcon) || (ref && (ref->flags & DFSREF_REFERRAL_SERVER));
-}
-
-static inline u64 cifs_flock_len(const struct file_lock *fl)
-{
-	return (u64)fl->fl_end - fl->fl_start + 1;
-}
-
-static inline size_t ntlmssp_workstation_name_size(const struct cifs_ses *ses)
-{
-	if (WARN_ON_ONCE(!ses || !ses->server))
-		return 0;
-	/*
-	 * Make workstation name no more than 15 chars when using insecure dialects as some legacy
-	 * servers do require it during NTLMSSP.
-	 */
-	if (ses->server->dialect <= SMB20_PROT_ID)
-		return min_t(size_t, sizeof(ses->workstation_name), RFC1001_NAME_LEN_WITH_NULL);
-	return sizeof(ses->workstation_name);
-}
-
-static inline void move_cifs_info_to_smb2(struct smb2_file_all_info *dst, const FILE_ALL_INFO *src)
-{
-	memcpy(dst, src, (size_t)((u8 *)&src->AccessFlags - (u8 *)src));
-	dst->AccessFlags = src->AccessFlags;
-	dst->CurrentByteOffset = src->CurrentByteOffset;
-	dst->Mode = src->Mode;
-	dst->AlignmentRequirement = src->AlignmentRequirement;
-	dst->FileNameLength = src->FileNameLength;
-}
-
-static inline int cifs_get_num_sgs(const struct smb_rqst *rqst,
-				   int num_rqst,
-				   const u8 *sig)
-{
-	unsigned int len, skip;
-	unsigned int nents = 0;
-	unsigned long addr;
-	int i, j;
-
-	/*
-	 * The first rqst has a transform header where the first 20 bytes are
-	 * not part of the encrypted blob.
-	 */
-	skip = 20;
-
-	/* Assumes the first rqst has a transform header as the first iov.
-	 * I.e.
-	 * rqst[0].rq_iov[0]  is transform header
-	 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
-	 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
-	 */
-	for (i = 0; i < num_rqst; i++) {
-		/* We really don't want a mixture of pinned and unpinned pages
-		 * in the sglist.  It's hard to keep track of which is what.
-		 * Instead, we convert to a BVEC-type iterator higher up.
-		 */
-		if (WARN_ON_ONCE(user_backed_iter(&rqst[i].rq_iter)))
-			return -EIO;
-
-		/* We also don't want to have any extra refs or pins to clean
-		 * up in the sglist.
-		 */
-		if (WARN_ON_ONCE(iov_iter_extract_will_pin(&rqst[i].rq_iter)))
-			return -EIO;
-
-		for (j = 0; j < rqst[i].rq_nvec; j++) {
-			struct kvec *iov = &rqst[i].rq_iov[j];
-
-			addr = (unsigned long)iov->iov_base + skip;
-			if (unlikely(is_vmalloc_addr((void *)addr))) {
-				len = iov->iov_len - skip;
-				nents += DIV_ROUND_UP(offset_in_page(addr) + len,
-						      PAGE_SIZE);
-			} else {
-				nents++;
-			}
-			skip = 0;
-		}
-		nents += iov_iter_npages(&rqst[i].rq_iter, INT_MAX);
-	}
-	nents += DIV_ROUND_UP(offset_in_page(sig) + SMB2_SIGNATURE_SIZE, PAGE_SIZE);
-	return nents;
-}
-
-/* We can not use the normal sg_set_buf() as we will sometimes pass a
- * stack object as buf.
- */
-static inline void cifs_sg_set_buf(struct sg_table *sgtable,
-				   const void *buf,
-				   unsigned int buflen)
-{
-	unsigned long addr = (unsigned long)buf;
-	unsigned int off = offset_in_page(addr);
-
-	addr &= PAGE_MASK;
-	if (unlikely(is_vmalloc_addr((void *)addr))) {
-		do {
-			unsigned int len = min_t(unsigned int, buflen, PAGE_SIZE - off);
-
-			sg_set_page(&sgtable->sgl[sgtable->nents++],
-				    vmalloc_to_page((void *)addr), len, off);
-
-			off = 0;
-			addr += PAGE_SIZE;
-			buflen -= len;
-		} while (buflen);
-	} else {
-		sg_set_page(&sgtable->sgl[sgtable->nents++],
-			    virt_to_page(addr), buflen, off);
-	}
-}
-
-#endif	/* _CIFS_GLOB_H */