1/*
   2 *   fs/cifs/cifsglob.h
   3 *
   4 *   Copyright (C) International Business Machines  Corp., 2002,2008
   5 *   Author(s): Steve French (sfrench@us.ibm.com)
   6 *              Jeremy Allison (jra@samba.org)
   7 *
   8 *   This library is free software; you can redistribute it and/or modify
   9 *   it under the terms of the GNU Lesser General Public License as published
  10 *   by the Free Software Foundation; either version 2.1 of the License, or
  11 *   (at your option) any later version.
  12 *
  13 *   This library is distributed in the hope that it will be useful,
  14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  16 *   the GNU Lesser General Public License for more details.
  17 *
  18 */
  19#ifndef _CIFS_GLOB_H
  20#define _CIFS_GLOB_H
  21
  22#include <linux/in.h>
  23#include <linux/in6.h>
  24#include <linux/slab.h>
  25#include <linux/mempool.h>
  26#include <linux/workqueue.h>
  27#include "cifs_fs_sb.h"
  28#include "cifsacl.h"
  29#include <crypto/internal/hash.h>
  30#include <linux/scatterlist.h>
  31#include <uapi/linux/cifs/cifs_mount.h>
 
  32#include "smb2pdu.h"
 
  33
  34#define CIFS_MAGIC_NUMBER 0xFF534D42      /* the first four bytes of SMB PDUs */
  35
  36/*
  37 * The sizes of various internal tables and strings
  38 */
  39#define MAX_UID_INFO 16
  40#define MAX_SES_INFO 2
  41#define MAX_TCON_INFO 4
  42
  43#define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
  44
  45#define CIFS_MIN_RCV_POOL 4
  46
  47#define MAX_REOPEN_ATT	5 /* these many maximum attempts to reopen a file */
  48/*
  49 * default attribute cache timeout (jiffies)
  50 */
  51#define CIFS_DEF_ACTIMEO (1 * HZ)
  52
  53/*
  54 * max attribute cache timeout (jiffies) - 2^30
  55 */
  56#define CIFS_MAX_ACTIMEO (1 << 30)
  57
  58/*
  59 * MAX_REQ is the maximum number of requests that WE will send
  60 * on one socket concurrently.
  61 */
  62#define CIFS_MAX_REQ 32767
  63
  64#define RFC1001_NAME_LEN 15
  65#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
  66
  67/* maximum length of ip addr as a string (including ipv6 and sctp) */
  68#define SERVER_NAME_LENGTH 80
  69#define SERVER_NAME_LEN_WITH_NULL     (SERVER_NAME_LENGTH + 1)
  70
  71/* echo interval in seconds */
  72#define SMB_ECHO_INTERVAL_MIN 1
  73#define SMB_ECHO_INTERVAL_MAX 600
  74#define SMB_ECHO_INTERVAL_DEFAULT 60
  75
  76/*
  77 * Default number of credits to keep available for SMB3.
  78 * This value is chosen somewhat arbitrarily. The Windows client
  79 * defaults to 128 credits, the Windows server allows clients up to
  80 * 512 credits (or 8K for later versions), and the NetApp server
  81 * does not limit clients at all.  Choose a high enough default value
  82 * such that the client shouldn't limit performance, but allow mount
  83 * to override (until you approach 64K, where we limit credits to 65000
  84 * to reduce possibility of seeing more server credit overflow bugs.
  85 */
  86#define SMB2_MAX_CREDITS_AVAILABLE 32000
  87
  88#include "cifspdu.h"
  89
  90#ifndef XATTR_DOS_ATTRIB
  91#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
  92#endif
  93
  94/*
  95 * CIFS vfs client Status information (based on what we know.)
  96 */
  97
  98/* associated with each tcp and smb session */
  99enum statusEnum {
 100	CifsNew = 0,
 101	CifsGood,
 102	CifsExiting,
 103	CifsNeedReconnect,
 104	CifsNeedNegotiate
 105};
 106
 107enum securityEnum {
 108	Unspecified = 0,	/* not specified */
 109	LANMAN,			/* Legacy LANMAN auth */
 110	NTLM,			/* Legacy NTLM012 auth with NTLM hash */
 111	NTLMv2,			/* Legacy NTLM auth with NTLMv2 hash */
 112	RawNTLMSSP,		/* NTLMSSP without SPNEGO, NTLMv2 hash */
 113	Kerberos,		/* Kerberos via SPNEGO */
 114};
 115
 116struct session_key {
 117	unsigned int len;
 118	char *response;
 119};
 120
 121/* crypto security descriptor definition */
 122struct sdesc {
 123	struct shash_desc shash;
 124	char ctx[];
 125};
 126
 127/* crypto hashing related structure/fields, not specific to a sec mech */
 128struct cifs_secmech {
 129	struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
 130	struct crypto_shash *md5; /* md5 hash function */
 131	struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
 132	struct crypto_shash *cmacaes; /* block-cipher based MAC function */
 133	struct crypto_shash *sha512; /* sha512 hash function */
 134	struct sdesc *sdeschmacmd5;  /* ctxt to generate ntlmv2 hash, CR1 */
 135	struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
 136	struct sdesc *sdeschmacsha256;  /* ctxt to generate smb2 signature */
 137	struct sdesc *sdesccmacaes;  /* ctxt to generate smb3 signature */
 138	struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
 139	struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
 140	struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
 141};
 142
 143/* per smb session structure/fields */
 144struct ntlmssp_auth {
 145	bool sesskey_per_smbsess; /* whether session key is per smb session */
 146	__u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
 147	__u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
 148	unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
 149	char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
 150};
 151
 152struct cifs_cred {
 153	int uid;
 154	int gid;
 155	int mode;
 156	int cecount;
 157	struct cifs_sid osid;
 158	struct cifs_sid gsid;
 159	struct cifs_ntace *ntaces;
 160	struct cifs_ace *aces;
 161};
 162
 163/*
 164 *****************************************************************
 165 * Except the CIFS PDUs themselves all the
 166 * globally interesting structs should go here
 167 *****************************************************************
 168 */
 169
 170/*
 171 * A smb_rqst represents a complete request to be issued to a server. It's
 172 * formed by a kvec array, followed by an array of pages. Page data is assumed
 173 * to start at the beginning of the first page.
 174 */
 175struct smb_rqst {
 176	struct kvec	*rq_iov;	/* array of kvecs */
 177	unsigned int	rq_nvec;	/* number of kvecs in array */
 178	struct page	**rq_pages;	/* pointer to array of page ptrs */
 179	unsigned int	rq_npages;	/* number pages in array */
 180	unsigned int	rq_pagesz;	/* page size to use */
 181	unsigned int	rq_tailsz;	/* length of last page */
 182};
 183
 184enum smb_version {
 185	Smb_1 = 1,
 186	Smb_20,
 187	Smb_21,
 188	Smb_30,
 189	Smb_302,
 190#ifdef CONFIG_CIFS_SMB311
 191	Smb_311,
 192#endif /* SMB311 */
 193	Smb_3any,
 194	Smb_default,
 195	Smb_version_err
 196};
 197
 198struct mid_q_entry;
 199struct TCP_Server_Info;
 200struct cifsFileInfo;
 201struct cifs_ses;
 202struct cifs_tcon;
 203struct dfs_info3_param;
 204struct cifs_fattr;
 205struct smb_vol;
 206struct cifs_fid;
 207struct cifs_readdata;
 208struct cifs_writedata;
 209struct cifs_io_parms;
 210struct cifs_search_info;
 211struct cifsInodeInfo;
 212struct cifs_open_parms;
 213
 214struct smb_version_operations {
 215	int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
 216			   struct mid_q_entry *);
 217	bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
 218	/* setup request: allocate mid, sign message */
 219	struct mid_q_entry *(*setup_request)(struct cifs_ses *,
 220						struct smb_rqst *);
 221	/* setup async request: allocate mid, sign message */
 222	struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
 223						struct smb_rqst *);
 224	/* check response: verify signature, map error */
 225	int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
 226			     bool);
 227	void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
 228			    const int);
 229	void (*set_credits)(struct TCP_Server_Info *, const int);
 230	int * (*get_credits_field)(struct TCP_Server_Info *, const int);
 231	unsigned int (*get_credits)(struct mid_q_entry *);
 232	__u64 (*get_next_mid)(struct TCP_Server_Info *);
 233	/* data offset from read response message */
 234	unsigned int (*read_data_offset)(char *);
 235	/*
 236	 * Data length from read response message
 237	 * When in_remaining is true, the returned data length is in
 238	 * message field DataRemaining for out-of-band data read (e.g through
 239	 * Memory Registration RDMA write in SMBD).
 240	 * Otherwise, the returned data length is in message field DataLength.
 241	 */
 242	unsigned int (*read_data_length)(char *, bool in_remaining);
 243	/* map smb to linux error */
 244	int (*map_error)(char *, bool);
 245	/* find mid corresponding to the response message */
 246	struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
 247	void (*dump_detail)(void *);
 248	void (*clear_stats)(struct cifs_tcon *);
 249	void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
 250	void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
 251	/* verify the message */
 252	int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
 253	bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
 254	int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *);
 255	void (*downgrade_oplock)(struct TCP_Server_Info *,
 256					struct cifsInodeInfo *, bool);
 257	/* process transaction2 response */
 258	bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
 259			     char *, int);
 260	/* check if we need to negotiate */
 261	bool (*need_neg)(struct TCP_Server_Info *);
 262	/* negotiate to the server */
 263	int (*negotiate)(const unsigned int, struct cifs_ses *);
 264	/* set negotiated write size */
 265	unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
 266	/* set negotiated read size */
 267	unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
 268	/* setup smb sessionn */
 269	int (*sess_setup)(const unsigned int, struct cifs_ses *,
 270			  const struct nls_table *);
 271	/* close smb session */
 272	int (*logoff)(const unsigned int, struct cifs_ses *);
 273	/* connect to a server share */
 274	int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
 275			    struct cifs_tcon *, const struct nls_table *);
 276	/* close tree connecion */
 277	int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
 278	/* get DFS referrals */
 279	int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
 280			     const char *, struct dfs_info3_param **,
 281			     unsigned int *, const struct nls_table *, int);
 282	/* informational QFS call */
 283	void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
 284	/* check if a path is accessible or not */
 285	int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
 286				  struct cifs_sb_info *, const char *);
 287	/* query path data from the server */
 288	int (*query_path_info)(const unsigned int, struct cifs_tcon *,
 289			       struct cifs_sb_info *, const char *,
 290			       FILE_ALL_INFO *, bool *, bool *);
 291	/* query file data from the server */
 292	int (*query_file_info)(const unsigned int, struct cifs_tcon *,
 293			       struct cifs_fid *, FILE_ALL_INFO *);
 294	/* get server index number */
 295	int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
 296			    struct cifs_sb_info *, const char *,
 297			    u64 *uniqueid, FILE_ALL_INFO *);
 298	/* set size by path */
 299	int (*set_path_size)(const unsigned int, struct cifs_tcon *,
 300			     const char *, __u64, struct cifs_sb_info *, bool);
 301	/* set size by file handle */
 302	int (*set_file_size)(const unsigned int, struct cifs_tcon *,
 303			     struct cifsFileInfo *, __u64, bool);
 304	/* set attributes */
 305	int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
 306			     const unsigned int);
 307	int (*set_compression)(const unsigned int, struct cifs_tcon *,
 308			       struct cifsFileInfo *);
 309	/* check if we can send an echo or nor */
 310	bool (*can_echo)(struct TCP_Server_Info *);
 311	/* send echo request */
 312	int (*echo)(struct TCP_Server_Info *);
 313	/* create directory */
 314	int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
 315		     struct cifs_sb_info *);
 316	/* set info on created directory */
 317	void (*mkdir_setinfo)(struct inode *, const char *,
 318			      struct cifs_sb_info *, struct cifs_tcon *,
 319			      const unsigned int);
 320	/* remove directory */
 321	int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
 322		     struct cifs_sb_info *);
 323	/* unlink file */
 324	int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
 325		      struct cifs_sb_info *);
 326	/* open, rename and delete file */
 327	int (*rename_pending_delete)(const char *, struct dentry *,
 328				     const unsigned int);
 329	/* send rename request */
 330	int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
 331		      const char *, struct cifs_sb_info *);
 332	/* send create hardlink request */
 333	int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
 334			       const char *, const char *,
 335			       struct cifs_sb_info *);
 336	/* query symlink target */
 337	int (*query_symlink)(const unsigned int, struct cifs_tcon *,
 338			     const char *, char **, struct cifs_sb_info *);
 339	/* open a file for non-posix mounts */
 340	int (*open)(const unsigned int, struct cifs_open_parms *,
 341		    __u32 *, FILE_ALL_INFO *);
 342	/* set fid protocol-specific info */
 343	void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
 344	/* close a file */
 345	void (*close)(const unsigned int, struct cifs_tcon *,
 346		      struct cifs_fid *);
 347	/* send a flush request to the server */
 348	int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
 349	/* async read from the server */
 350	int (*async_readv)(struct cifs_readdata *);
 351	/* async write to the server */
 352	int (*async_writev)(struct cifs_writedata *,
 353			    void (*release)(struct kref *));
 354	/* sync read from the server */
 355	int (*sync_read)(const unsigned int, struct cifs_fid *,
 356			 struct cifs_io_parms *, unsigned int *, char **,
 357			 int *);
 358	/* sync write to the server */
 359	int (*sync_write)(const unsigned int, struct cifs_fid *,
 360			  struct cifs_io_parms *, unsigned int *, struct kvec *,
 361			  unsigned long);
 362	/* open dir, start readdir */
 363	int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
 364			       const char *, struct cifs_sb_info *,
 365			       struct cifs_fid *, __u16,
 366			       struct cifs_search_info *);
 367	/* continue readdir */
 368	int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
 369			      struct cifs_fid *,
 370			      __u16, struct cifs_search_info *srch_inf);
 371	/* close dir */
 372	int (*close_dir)(const unsigned int, struct cifs_tcon *,
 373			 struct cifs_fid *);
 374	/* calculate a size of SMB message */
 375	unsigned int (*calc_smb_size)(void *);
 376	/* check for STATUS_PENDING and process it in a positive case */
 377	bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
 378	/* check for STATUS_NETWORK_SESSION_EXPIRED */
 379	bool (*is_session_expired)(char *);
 380	/* send oplock break response */
 381	int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
 382			       struct cifsInodeInfo *);
 383	/* query remote filesystem */
 384	int (*queryfs)(const unsigned int, struct cifs_tcon *,
 385		       struct kstatfs *);
 386	/* send mandatory brlock to the server */
 387	int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
 388			 __u64, __u32, int, int, bool);
 389	/* unlock range of mandatory locks */
 390	int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
 391				 const unsigned int);
 392	/* push brlocks from the cache to the server */
 393	int (*push_mand_locks)(struct cifsFileInfo *);
 394	/* get lease key of the inode */
 395	void (*get_lease_key)(struct inode *, struct cifs_fid *);
 396	/* set lease key of the inode */
 397	void (*set_lease_key)(struct inode *, struct cifs_fid *);
 398	/* generate new lease key */
 399	void (*new_lease_key)(struct cifs_fid *);
 400	int (*generate_signingkey)(struct cifs_ses *);
 401	int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
 402	int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
 403			     struct cifsFileInfo *src_file);
 404	int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
 405			     struct cifsFileInfo *src_file, void __user *);
 406	int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
 407				struct cifs_sb_info *, const unsigned char *,
 408				char *, unsigned int *);
 409	int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
 410				 struct cifs_sb_info *, const unsigned char *,
 411				 char *, unsigned int *);
 412	/* if we can do cache read operations */
 413	bool (*is_read_op)(__u32);
 414	/* set oplock level for the inode */
 415	void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
 416				 bool *);
 417	/* create lease context buffer for CREATE request */
 418	char * (*create_lease_buf)(u8 *, u8);
 419	/* parse lease context buffer and return oplock/epoch info */
 420	__u8 (*parse_lease_buf)(void *, unsigned int *);
 421	ssize_t (*copychunk_range)(const unsigned int,
 422			struct cifsFileInfo *src_file,
 423			struct cifsFileInfo *target_file,
 424			u64 src_off, u64 len, u64 dest_off);
 425	int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
 426			struct cifsFileInfo *target_file, u64 src_off, u64 len,
 427			u64 dest_off);
 428	int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
 429	ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
 430			const unsigned char *, const unsigned char *, char *,
 431			size_t, struct cifs_sb_info *);
 432	int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
 433			const char *, const void *, const __u16,
 434			const struct nls_table *, struct cifs_sb_info *);
 435	struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
 436			const char *, u32 *);
 437	struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
 438			const struct cifs_fid *, u32 *);
 439	int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
 440			int);
 441	/* writepages retry size */
 442	unsigned int (*wp_retry_size)(struct inode *);
 443	/* get mtu credits */
 444	int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
 445				unsigned int *, unsigned int *);
 446	/* check if we need to issue closedir */
 447	bool (*dir_needs_close)(struct cifsFileInfo *);
 448	long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
 449			  loff_t);
 450	/* init transform request - used for encryption for now */
 451	int (*init_transform_rq)(struct TCP_Server_Info *, struct smb_rqst *,
 452				 struct smb_rqst *);
 453	/* free transform request */
 454	void (*free_transform_rq)(struct smb_rqst *);
 455	int (*is_transform_hdr)(void *buf);
 456	int (*receive_transform)(struct TCP_Server_Info *,
 457				 struct mid_q_entry **);
 458	enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
 459			    enum securityEnum);
 460
 461};
 462
 463struct smb_version_values {
 464	char		*version_string;
 465	__u16		protocol_id;
 466	__u32		req_capabilities;
 467	__u32		large_lock_type;
 468	__u32		exclusive_lock_type;
 469	__u32		shared_lock_type;
 470	__u32		unlock_lock_type;
 471	size_t		header_preamble_size;
 472	size_t		header_size;
 473	size_t		max_header_size;
 474	size_t		read_rsp_size;
 475	__le16		lock_cmd;
 476	unsigned int	cap_unix;
 477	unsigned int	cap_nt_find;
 478	unsigned int	cap_large_files;
 479	__u16		signing_enabled;
 480	__u16		signing_required;
 481	size_t		create_lease_size;
 482};
 483
 484#define HEADER_SIZE(server) (server->vals->header_size)
 485#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
 486
 487struct smb_vol {
 488	char *username;
 489	char *password;
 490	char *domainname;
 491	char *UNC;
 492	char *iocharset;  /* local code page for mapping to and from Unicode */
 493	char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
 494	char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
 495	kuid_t cred_uid;
 496	kuid_t linux_uid;
 497	kgid_t linux_gid;
 498	kuid_t backupuid;
 499	kgid_t backupgid;
 500	umode_t file_mode;
 501	umode_t dir_mode;
 502	enum securityEnum sectype; /* sectype requested via mnt opts */
 503	bool sign; /* was signing requested via mnt opts? */
 504	bool retry:1;
 505	bool intr:1;
 506	bool setuids:1;
 507	bool setuidfromacl:1;
 508	bool override_uid:1;
 509	bool override_gid:1;
 510	bool dynperm:1;
 511	bool noperm:1;
 512	bool no_psx_acl:1; /* set if posix acl support should be disabled */
 513	bool cifs_acl:1;
 514	bool backupuid_specified; /* mount option  backupuid  is specified */
 515	bool backupgid_specified; /* mount option  backupgid  is specified */
 516	bool no_xattr:1;   /* set if xattr (EA) support should be disabled*/
 517	bool server_ino:1; /* use inode numbers from server ie UniqueId */
 518	bool direct_io:1;
 519	bool strict_io:1; /* strict cache behavior */
 520	bool remap:1;      /* set to remap seven reserved chars in filenames */
 521	bool sfu_remap:1;  /* remap seven reserved chars ala SFU */
 522	bool posix_paths:1; /* unset to not ask for posix pathnames. */
 523	bool no_linux_ext:1;
 524	bool sfu_emul:1;
 525	bool nullauth:1;   /* attempt to authenticate with null user */
 526	bool nocase:1;     /* request case insensitive filenames */
 527	bool nobrl:1;      /* disable sending byte range locks to srv */
 528	bool mand_lock:1;  /* send mandatory not posix byte range lock reqs */
 529	bool seal:1;       /* request transport encryption on share */
 530	bool nodfs:1;      /* Do not request DFS, even if available */
 531	bool local_lease:1; /* check leases only on local system, not remote */
 532	bool noblocksnd:1;
 533	bool noautotune:1;
 534	bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
 535	bool fsc:1;	/* enable fscache */
 536	bool mfsymlinks:1; /* use Minshall+French Symlinks */
 537	bool multiuser:1;
 538	bool rwpidforward:1; /* pid forward for read/write operations */
 539	bool nosharesock:1;
 540	bool persistent:1;
 541	bool nopersistent:1;
 542	bool resilient:1; /* noresilient not required since not fored for CA */
 543	bool domainauto:1;
 544	bool rdma:1;
 545	unsigned int rsize;
 546	unsigned int wsize;
 547	bool sockopt_tcp_nodelay:1;
 548	unsigned long actimeo; /* attribute cache timeout (jiffies) */
 549	struct smb_version_operations *ops;
 550	struct smb_version_values *vals;
 551	char *prepath;
 552	struct sockaddr_storage dstaddr; /* destination address */
 553	struct sockaddr_storage srcaddr; /* allow binding to a local IP */
 554	struct nls_table *local_nls;
 555	unsigned int echo_interval; /* echo interval in secs */
 556	__u64 snapshot_time; /* needed for timewarp tokens */
 557	unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
 558};
 559
 560#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
 561			 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
 562			 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
 563			 CIFS_MOUNT_MAP_SFM_CHR | \
 564			 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
 565			 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
 566			 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
 567			 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
 568			 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
 569			 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
 570			 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
 571
 572#define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
 573		      SB_NODEV | SB_SYNCHRONOUS)
 574
 575struct cifs_mnt_data {
 576	struct cifs_sb_info *cifs_sb;
 577	struct smb_vol *vol;
 578	int flags;
 579};
 580
 581static inline unsigned int
 582get_rfc1002_length(void *buf)
 583{
 584	return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
 585}
 586
 587static inline void
 588inc_rfc1001_len(void *buf, int count)
 589{
 590	be32_add_cpu((__be32 *)buf, count);
 591}
 592
 593struct TCP_Server_Info {
 594	struct list_head tcp_ses_list;
 595	struct list_head smb_ses_list;
 596	int srv_count; /* reference counter */
 597	/* 15 character server name + 0x20 16th byte indicating type = srv */
 598	char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 599	struct smb_version_operations	*ops;
 600	struct smb_version_values	*vals;
 601	enum statusEnum tcpStatus; /* what we think the status is */
 602	char *hostname; /* hostname portion of UNC string */
 603	struct socket *ssocket;
 604	struct sockaddr_storage dstaddr;
 605	struct sockaddr_storage srcaddr; /* locally bind to this IP */
 606#ifdef CONFIG_NET_NS
 607	struct net *net;
 608#endif
 609	wait_queue_head_t response_q;
 610	wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
 611	struct list_head pending_mid_q;
 612	bool noblocksnd;		/* use blocking sendmsg */
 613	bool noautotune;		/* do not autotune send buf sizes */
 614	bool tcp_nodelay;
 615	unsigned int credits;  /* send no more requests at once */
 616	unsigned int max_credits; /* can override large 32000 default at mnt */
 617	unsigned int in_flight;  /* number of requests on the wire to server */
 618	spinlock_t req_lock;  /* protect the two values above */
 619	struct mutex srv_mutex;
 620	struct task_struct *tsk;
 621	char server_GUID[16];
 622	__u16 sec_mode;
 623	bool sign; /* is signing enabled on this connection? */
 624	bool session_estab; /* mark when very first sess is established */
 
 625	int echo_credits;  /* echo reserved slots */
 626	int oplock_credits;  /* oplock break reserved slots */
 627	bool echoes:1; /* enable echoes */
 628	__u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
 
 629	u16 dialect; /* dialect index that server chose */
 630	bool oplocks:1; /* enable oplocks */
 631	unsigned int maxReq;	/* Clients should submit no more */
 632	/* than maxReq distinct unanswered SMBs to the server when using  */
 633	/* multiplexed reads or writes */
 634	unsigned int maxBuf;	/* maxBuf specifies the maximum */
 635	/* message size the server can send or receive for non-raw SMBs */
 636	/* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
 637	/* when socket is setup (and during reconnect) before NegProt sent */
 638	unsigned int max_rw;	/* maxRw specifies the maximum */
 639	/* message size the server can send or receive for */
 640	/* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
 641	unsigned int capabilities; /* selective disabling of caps by smb sess */
 642	int timeAdj;  /* Adjust for difference in server time zone in sec */
 643	__u64 CurrentMid;         /* multiplex id - rotating counter */
 644	char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
 645	/* 16th byte of RFC1001 workstation name is always null */
 646	char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
 647	__u32 sequence_number; /* for signing, protected by srv_mutex */
 648	struct session_key session_key;
 649	unsigned long lstrp; /* when we got last response from this server */
 650	struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
 651#define	CIFS_NEGFLAVOR_LANMAN	0	/* wct == 13, LANMAN */
 652#define	CIFS_NEGFLAVOR_UNENCAP	1	/* wct == 17, but no ext_sec */
 653#define	CIFS_NEGFLAVOR_EXTENDED	2	/* wct == 17, ext_sec bit set */
 654	char	negflavor;	/* NEGOTIATE response flavor */
 655	/* extended security flavors that server supports */
 656	bool	sec_ntlmssp;		/* supports NTLMSSP */
 657	bool	sec_kerberosu2u;	/* supports U2U Kerberos */
 658	bool	sec_kerberos;		/* supports plain Kerberos */
 659	bool	sec_mskerberos;		/* supports legacy MS Kerberos */
 660	bool	large_buf;		/* is current buffer large? */
 661	/* use SMBD connection instead of socket */
 662	bool	rdma;
 663	/* point to the SMBD connection if RDMA is used instead of socket */
 664	struct smbd_connection *smbd_conn;
 665	struct delayed_work	echo; /* echo ping workqueue job */
 666	char	*smallbuf;	/* pointer to current "small" buffer */
 667	char	*bigbuf;	/* pointer to current "big" buffer */
 668	/* Total size of this PDU. Only valid from cifs_demultiplex_thread */
 669	unsigned int pdu_size;
 670	unsigned int total_read; /* total amount of data read in this pass */
 671#ifdef CONFIG_CIFS_FSCACHE
 672	struct fscache_cookie   *fscache; /* client index cache cookie */
 673#endif
 674#ifdef CONFIG_CIFS_STATS2
 675	atomic_t in_send; /* requests trying to send */
 676	atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
 677#endif
 
 678	unsigned int	max_read;
 679	unsigned int	max_write;
 680#ifdef CONFIG_CIFS_SMB311
 681	__le16	cipher_type;
 682	 /* save initital negprot hash */
 683	__u8	preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
 684#endif /* 3.1.1 */
 685	struct delayed_work reconnect; /* reconnect workqueue job */
 686	struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
 
 687	unsigned long echo_interval;
 688};
 689
 690static inline unsigned int
 691in_flight(struct TCP_Server_Info *server)
 692{
 693	unsigned int num;
 694	spin_lock(&server->req_lock);
 695	num = server->in_flight;
 696	spin_unlock(&server->req_lock);
 697	return num;
 698}
 699
 700static inline bool
 701has_credits(struct TCP_Server_Info *server, int *credits)
 702{
 703	int num;
 704	spin_lock(&server->req_lock);
 705	num = *credits;
 706	spin_unlock(&server->req_lock);
 707	return num > 0;
 708}
 709
 710static inline void
 711add_credits(struct TCP_Server_Info *server, const unsigned int add,
 712	    const int optype)
 713{
 714	server->ops->add_credits(server, add, optype);
 715}
 716
 717static inline void
 718add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
 719			const int optype)
 720{
 721	if (add) {
 722		server->ops->add_credits(server, add, optype);
 723		wake_up(&server->request_q);
 724	}
 725}
 726
 727static inline void
 728set_credits(struct TCP_Server_Info *server, const int val)
 729{
 730	server->ops->set_credits(server, val);
 731}
 732
 733static inline __le64
 734get_next_mid64(struct TCP_Server_Info *server)
 735{
 736	return cpu_to_le64(server->ops->get_next_mid(server));
 737}
 738
 739static inline __le16
 740get_next_mid(struct TCP_Server_Info *server)
 741{
 742	__u16 mid = server->ops->get_next_mid(server);
 743	/*
 744	 * The value in the SMB header should be little endian for easy
 745	 * on-the-wire decoding.
 746	 */
 747	return cpu_to_le16(mid);
 748}
 749
 750static inline __u16
 751get_mid(const struct smb_hdr *smb)
 752{
 753	return le16_to_cpu(smb->Mid);
 754}
 755
 756static inline bool
 757compare_mid(__u16 mid, const struct smb_hdr *smb)
 758{
 759	return mid == le16_to_cpu(smb->Mid);
 760}
 761
 762/*
 763 * When the server supports very large reads and writes via POSIX extensions,
 764 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
 765 * including the RFC1001 length.
 766 *
 767 * Note that this might make for "interesting" allocation problems during
 768 * writeback however as we have to allocate an array of pointers for the
 769 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
 770 *
 771 * For reads, there is a similar problem as we need to allocate an array
 772 * of kvecs to handle the receive, though that should only need to be done
 773 * once.
 774 */
 775#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
 776#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
 777
 778/*
 779 * When the server doesn't allow large posix writes, only allow a rsize/wsize
 780 * of 2^17-1 minus the size of the call header. That allows for a read or
 781 * write up to the maximum size described by RFC1002.
 782 */
 783#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
 784#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
 785
 786/*
 787 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
 788 * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
 789 * a single wsize request with a single call.
 790 */
 791#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
 792
 793/*
 794 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
 795 * those values when posix extensions aren't in force. In actuality here, we
 796 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
 797 * to be ok with the extra byte even though Windows doesn't send writes that
 798 * are that large.
 799 *
 800 * Citation:
 801 *
 802 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
 803 */
 804#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
 805#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
 806
 807/*
 808 * Macros to allow the TCP_Server_Info->net field and related code to drop out
 809 * when CONFIG_NET_NS isn't set.
 810 */
 811
 812#ifdef CONFIG_NET_NS
 813
 814static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
 815{
 816	return srv->net;
 817}
 818
 819static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 820{
 821	srv->net = net;
 822}
 823
 824#else
 825
 826static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
 827{
 828	return &init_net;
 829}
 830
 831static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
 832{
 833}
 834
 835#endif
 836
 837/*
 838 * Session structure.  One of these for each uid session with a particular host
 839 */
 840struct cifs_ses {
 841	struct list_head smb_ses_list;
 842	struct list_head tcon_list;
 843	struct cifs_tcon *tcon_ipc;
 844	struct mutex session_mutex;
 845	struct TCP_Server_Info *server;	/* pointer to server info */
 846	int ses_count;		/* reference counter */
 847	enum statusEnum status;
 848	unsigned overrideSecFlg;  /* if non-zero override global sec flags */
 
 849	char *serverOS;		/* name of operating system underlying server */
 850	char *serverNOS;	/* name of network operating system of server */
 851	char *serverDomain;	/* security realm of server */
 852	__u64 Suid;		/* remote smb uid  */
 853	kuid_t linux_uid;	/* overriding owner of files on the mount */
 854	kuid_t cred_uid;	/* owner of credentials */
 855	unsigned int capabilities;
 856	char serverName[SERVER_NAME_LEN_WITH_NULL];
 
 857	char *user_name;	/* must not be null except during init of sess
 858				   and after mount option parsing we fill it */
 859	char *domainName;
 860	char *password;
 861	struct session_key auth_key;
 862	struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
 863	enum securityEnum sectype; /* what security flavor was specified? */
 864	bool sign;		/* is signing required? */
 865	bool need_reconnect:1; /* connection reset, uid now invalid */
 866	bool domainAuto:1;
 
 867	__u16 session_flags;
 868	__u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
 869	__u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
 870	__u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
 871#ifdef CONFIG_CIFS_SMB311
 872	__u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
 873#endif /* 3.1.1 */
 874};
 875
 876static inline bool
 877cap_unix(struct cifs_ses *ses)
 878{
 879	return ses->server->vals->cap_unix & ses->capabilities;
 880}
 881
 882/*
 883 * there is one of these for each connection to a resource on a particular
 884 * session
 885 */
 886struct cifs_tcon {
 887	struct list_head tcon_list;
 888	int tc_count;
 889	struct list_head rlist; /* reconnect list */
 890	struct list_head openFileList;
 891	spinlock_t open_file_lock; /* protects list above */
 892	struct cifs_ses *ses;	/* pointer to session associated with */
 893	char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
 894	char *nativeFileSystem;
 895	char *password;		/* for share-level security */
 896	__u32 tid;		/* The 4 byte tree id */
 897	__u16 Flags;		/* optional support bits */
 898	enum statusEnum tidStatus;
 899#ifdef CONFIG_CIFS_STATS
 900	atomic_t num_smbs_sent;
 901	union {
 902		struct {
 903			atomic_t num_writes;
 904			atomic_t num_reads;
 905			atomic_t num_flushes;
 906			atomic_t num_oplock_brks;
 907			atomic_t num_opens;
 908			atomic_t num_closes;
 909			atomic_t num_deletes;
 910			atomic_t num_mkdirs;
 911			atomic_t num_posixopens;
 912			atomic_t num_posixmkdirs;
 913			atomic_t num_rmdirs;
 914			atomic_t num_renames;
 915			atomic_t num_t2renames;
 916			atomic_t num_ffirst;
 917			atomic_t num_fnext;
 918			atomic_t num_fclose;
 919			atomic_t num_hardlinks;
 920			atomic_t num_symlinks;
 921			atomic_t num_locks;
 922			atomic_t num_acl_get;
 923			atomic_t num_acl_set;
 924		} cifs_stats;
 
 925		struct {
 926			atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
 927			atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
 928		} smb2_stats;
 
 929	} stats;
 930#ifdef CONFIG_CIFS_STATS2
 931	unsigned long long time_writes;
 932	unsigned long long time_reads;
 933	unsigned long long time_opens;
 934	unsigned long long time_deletes;
 935	unsigned long long time_closes;
 936	unsigned long long time_mkdirs;
 937	unsigned long long time_rmdirs;
 938	unsigned long long time_renames;
 939	unsigned long long time_t2renames;
 940	unsigned long long time_ffirst;
 941	unsigned long long time_fnext;
 942	unsigned long long time_fclose;
 943#endif /* CONFIG_CIFS_STATS2 */
 944	__u64    bytes_read;
 945	__u64    bytes_written;
 946	spinlock_t stat_lock;  /* protects the two fields above */
 947#endif /* CONFIG_CIFS_STATS */
 948	FILE_SYSTEM_DEVICE_INFO fsDevInfo;
 949	FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
 950	FILE_SYSTEM_UNIX_INFO fsUnixInfo;
 951	bool ipc:1;   /* set if connection to IPC$ share (always also pipe) */
 952	bool pipe:1;  /* set if connection to pipe share */
 953	bool print:1; /* set if connection to printer share */
 954	bool retry:1;
 955	bool nocase:1;
 956	bool seal:1;      /* transport encryption for this mounted share */
 957	bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
 958				for this mount even if server would support */
 959	bool local_lease:1; /* check leases (only) on local system not remote */
 960	bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
 961	bool broken_sparse_sup; /* if server or share does not support sparse */
 962	bool need_reconnect:1; /* connection reset, tid now invalid */
 963	bool need_reopen_files:1; /* need to reopen tcon file handles */
 964	bool use_resilient:1; /* use resilient instead of durable handles */
 965	bool use_persistent:1; /* use persistent instead of durable handles */
 
 
 
 966	__le32 capabilities;
 967	__u32 share_flags;
 968	__u32 maximal_access;
 969	__u32 vol_serial_number;
 970	__le64 vol_create_time;
 971	__u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
 972	__u32 ss_flags;		/* sector size flags */
 973	__u32 perf_sector_size; /* best sector size for perf */
 974	__u32 max_chunks;
 975	__u32 max_bytes_chunk;
 976	__u32 max_bytes_copy;
 
 977#ifdef CONFIG_CIFS_FSCACHE
 978	u64 resource_id;		/* server resource id */
 979	struct fscache_cookie *fscache;	/* cookie for share */
 980#endif
 981	struct list_head pending_opens;	/* list of incomplete opens */
 982	/* BB add field for back pointer to sb struct(s)? */
 983};
 984
 985/*
 986 * This is a refcounted and timestamped container for a tcon pointer. The
 987 * container holds a tcon reference. It is considered safe to free one of
 988 * these when the tl_count goes to 0. The tl_time is the time of the last
 989 * "get" on the container.
 990 */
 991struct tcon_link {
 992	struct rb_node		tl_rbnode;
 993	kuid_t			tl_uid;
 994	unsigned long		tl_flags;
 995#define TCON_LINK_MASTER	0
 996#define TCON_LINK_PENDING	1
 997#define TCON_LINK_IN_TREE	2
 998	unsigned long		tl_time;
 999	atomic_t		tl_count;
1000	struct cifs_tcon	*tl_tcon;
1001};
1002
1003extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1004
1005static inline struct cifs_tcon *
1006tlink_tcon(struct tcon_link *tlink)
1007{
1008	return tlink->tl_tcon;
1009}
1010
1011extern void cifs_put_tlink(struct tcon_link *tlink);
1012
1013static inline struct tcon_link *
1014cifs_get_tlink(struct tcon_link *tlink)
1015{
1016	if (tlink && !IS_ERR(tlink))
1017		atomic_inc(&tlink->tl_count);
1018	return tlink;
1019}
1020
1021/* This function is always expected to succeed */
1022extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1023
1024#define CIFS_OPLOCK_NO_CHANGE 0xfe
1025
1026struct cifs_pending_open {
1027	struct list_head olist;
1028	struct tcon_link *tlink;
1029	__u8 lease_key[16];
1030	__u32 oplock;
1031};
1032
1033/*
1034 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1035 * This is used to track byte stream locks on the file
1036 */
1037struct cifsLockInfo {
1038	struct list_head llist;	/* pointer to next cifsLockInfo */
1039	struct list_head blist; /* pointer to locks blocked on this */
1040	wait_queue_head_t block_q;
1041	__u64 offset;
1042	__u64 length;
1043	__u32 pid;
1044	__u32 type;
1045};
1046
1047/*
1048 * One of these for each open instance of a file
1049 */
1050struct cifs_search_info {
1051	loff_t index_of_last_entry;
1052	__u16 entries_in_buffer;
1053	__u16 info_level;
1054	__u32 resume_key;
1055	char *ntwrk_buf_start;
1056	char *srch_entries_start;
1057	char *last_entry;
1058	const char *presume_name;
1059	unsigned int resume_name_len;
1060	bool endOfSearch:1;
1061	bool emptyDir:1;
1062	bool unicode:1;
1063	bool smallBuf:1; /* so we know which buf_release function to call */
1064};
1065
1066struct cifs_open_parms {
1067	struct cifs_tcon *tcon;
1068	struct cifs_sb_info *cifs_sb;
1069	int disposition;
1070	int desired_access;
1071	int create_options;
1072	const char *path;
1073	struct cifs_fid *fid;
1074	bool reconnect:1;
1075};
1076
1077struct cifs_fid {
1078	__u16 netfid;
 
1079	__u64 persistent_fid;	/* persist file id for smb2 */
1080	__u64 volatile_fid;	/* volatile file id for smb2 */
1081	__u8 lease_key[SMB2_LEASE_KEY_SIZE];	/* lease key for smb2 */
1082	__u8 create_guid[16];
 
1083	struct cifs_pending_open *pending_open;
1084	unsigned int epoch;
1085	bool purge_cache;
1086};
1087
1088struct cifs_fid_locks {
1089	struct list_head llist;
1090	struct cifsFileInfo *cfile;	/* fid that owns locks */
1091	struct list_head locks;		/* locks held by fid above */
1092};
1093
1094struct cifsFileInfo {
1095	/* following two lists are protected by tcon->open_file_lock */
1096	struct list_head tlist;	/* pointer to next fid owned by tcon */
1097	struct list_head flist;	/* next fid (file instance) for this inode */
1098	/* lock list below protected by cifsi->lock_sem */
1099	struct cifs_fid_locks *llist;	/* brlocks held by this fid */
1100	kuid_t uid;		/* allows finding which FileInfo structure */
1101	__u32 pid;		/* process id who opened file */
1102	struct cifs_fid fid;	/* file id from remote */
1103	struct list_head rlist; /* reconnect list */
1104	/* BB add lock scope info here if needed */ ;
1105	/* lock scope id (0 if none) */
1106	struct dentry *dentry;
1107	struct tcon_link *tlink;
1108	unsigned int f_flags;
1109	bool invalidHandle:1;	/* file closed via session abend */
1110	bool oplock_break_cancelled:1;
1111	int count;
1112	spinlock_t file_info_lock; /* protects four flag/count fields above */
1113	struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1114	struct cifs_search_info srch_inf;
1115	struct work_struct oplock_break; /* work for oplock breaks */
1116};
1117
1118struct cifs_io_parms {
1119	__u16 netfid;
 
1120	__u64 persistent_fid;	/* persist file id for smb2 */
1121	__u64 volatile_fid;	/* volatile file id for smb2 */
 
1122	__u32 pid;
1123	__u64 offset;
1124	unsigned int length;
1125	struct cifs_tcon *tcon;
1126};
1127
1128struct cifs_aio_ctx {
1129	struct kref		refcount;
1130	struct list_head	list;
1131	struct mutex		aio_mutex;
1132	struct completion	done;
1133	struct iov_iter		iter;
1134	struct kiocb		*iocb;
1135	struct cifsFileInfo	*cfile;
1136	struct bio_vec		*bv;
1137	loff_t			pos;
1138	unsigned int		npages;
1139	ssize_t			rc;
1140	unsigned int		len;
1141	unsigned int		total_len;
1142	bool			should_dirty;
1143};
1144
1145struct cifs_readdata;
1146
1147/* asynchronous read support */
1148struct cifs_readdata {
1149	struct kref			refcount;
1150	struct list_head		list;
1151	struct completion		done;
1152	struct cifsFileInfo		*cfile;
1153	struct address_space		*mapping;
1154	struct cifs_aio_ctx		*ctx;
1155	__u64				offset;
1156	unsigned int			bytes;
1157	unsigned int			got_bytes;
1158	pid_t				pid;
1159	int				result;
1160	struct work_struct		work;
1161	int (*read_into_pages)(struct TCP_Server_Info *server,
1162				struct cifs_readdata *rdata,
1163				unsigned int len);
1164	int (*copy_into_pages)(struct TCP_Server_Info *server,
1165				struct cifs_readdata *rdata,
1166				struct iov_iter *iter);
1167	struct kvec			iov[2];
1168#ifdef CONFIG_CIFS_SMB_DIRECT
1169	struct smbd_mr			*mr;
1170#endif
1171	unsigned int			pagesz;
1172	unsigned int			tailsz;
1173	unsigned int			credits;
1174	unsigned int			nr_pages;
1175	struct page			*pages[];
1176};
1177
1178struct cifs_writedata;
1179
1180/* asynchronous write support */
1181struct cifs_writedata {
1182	struct kref			refcount;
1183	struct list_head		list;
1184	struct completion		done;
1185	enum writeback_sync_modes	sync_mode;
1186	struct work_struct		work;
1187	struct cifsFileInfo		*cfile;
1188	struct cifs_aio_ctx		*ctx;
1189	__u64				offset;
1190	pid_t				pid;
1191	unsigned int			bytes;
1192	int				result;
1193#ifdef CONFIG_CIFS_SMB_DIRECT
1194	struct smbd_mr			*mr;
1195#endif
1196	unsigned int			pagesz;
1197	unsigned int			tailsz;
1198	unsigned int			credits;
1199	unsigned int			nr_pages;
1200	struct page			*pages[];
1201};
1202
1203/*
1204 * Take a reference on the file private data. Must be called with
1205 * cfile->file_info_lock held.
1206 */
1207static inline void
1208cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1209{
1210	++cifs_file->count;
1211}
1212
1213struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1214void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1215
1216#define CIFS_CACHE_READ_FLG	1
1217#define CIFS_CACHE_HANDLE_FLG	2
1218#define CIFS_CACHE_RH_FLG	(CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1219#define CIFS_CACHE_WRITE_FLG	4
1220#define CIFS_CACHE_RW_FLG	(CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1221#define CIFS_CACHE_RHW_FLG	(CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1222
1223#define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1224#define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1225#define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1226
1227/*
1228 * One of these for each file inode
1229 */
1230
1231struct cifsInodeInfo {
1232	bool can_cache_brlcks;
1233	struct list_head llist;	/* locks helb by this inode */
1234	struct rw_semaphore lock_sem;	/* protect the fields above */
1235	/* BB add in lists for dirty pages i.e. write caching info for oplock */
1236	struct list_head openFileList;
1237	__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1238	unsigned int oplock;		/* oplock/lease level we have */
1239	unsigned int epoch;		/* used to track lease state changes */
1240#define CIFS_INODE_PENDING_OPLOCK_BREAK   (0) /* oplock break in progress */
1241#define CIFS_INODE_PENDING_WRITERS	  (1) /* Writes in progress */
1242#define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1243#define CIFS_INO_DELETE_PENDING		  (3) /* delete pending on server */
1244#define CIFS_INO_INVALID_MAPPING	  (4) /* pagecache is invalid */
1245#define CIFS_INO_LOCK			  (5) /* lock bit for synchronization */
1246	unsigned long flags;
1247	spinlock_t writers_lock;
1248	unsigned int writers;		/* Number of writers on this inode */
1249	unsigned long time;		/* jiffies of last update of inode */
1250	u64  server_eof;		/* current file size on server -- protected by i_lock */
1251	u64  uniqueid;			/* server inode number */
1252	u64  createtime;		/* creation time on server */
 
1253	__u8 lease_key[SMB2_LEASE_KEY_SIZE];	/* lease key for this inode */
 
1254#ifdef CONFIG_CIFS_FSCACHE
1255	struct fscache_cookie *fscache;
1256#endif
1257	struct inode vfs_inode;
1258};
1259
1260static inline struct cifsInodeInfo *
1261CIFS_I(struct inode *inode)
1262{
1263	return container_of(inode, struct cifsInodeInfo, vfs_inode);
1264}
1265
1266static inline struct cifs_sb_info *
1267CIFS_SB(struct super_block *sb)
1268{
1269	return sb->s_fs_info;
1270}
1271
1272static inline struct cifs_sb_info *
1273CIFS_FILE_SB(struct file *file)
1274{
1275	return CIFS_SB(file_inode(file)->i_sb);
1276}
1277
1278static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1279{
1280	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1281		return '/';
1282	else
1283		return '\\';
1284}
1285
1286static inline void
1287convert_delimiter(char *path, char delim)
1288{
1289	char old_delim, *pos;
1290
1291	if (delim == '/')
1292		old_delim = '\\';
1293	else
1294		old_delim = '/';
1295
1296	pos = path;
1297	while ((pos = strchr(pos, old_delim)))
1298		*pos = delim;
1299}
1300
1301#ifdef CONFIG_CIFS_STATS
1302#define cifs_stats_inc atomic_inc
1303
1304static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1305					    unsigned int bytes)
1306{
1307	if (bytes) {
1308		spin_lock(&tcon->stat_lock);
1309		tcon->bytes_written += bytes;
1310		spin_unlock(&tcon->stat_lock);
1311	}
1312}
1313
1314static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1315					 unsigned int bytes)
1316{
1317	spin_lock(&tcon->stat_lock);
1318	tcon->bytes_read += bytes;
1319	spin_unlock(&tcon->stat_lock);
1320}
1321#else
1322
1323#define  cifs_stats_inc(field) do {} while (0)
1324#define  cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1325#define  cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1326
1327#endif
1328
1329
1330/*
1331 * This is the prototype for the mid receive function. This function is for
1332 * receiving the rest of the SMB frame, starting with the WordCount (which is
1333 * just after the MID in struct smb_hdr). Note:
1334 *
1335 * - This will be called by cifsd, with no locks held.
1336 * - The mid will still be on the pending_mid_q.
1337 * - mid->resp_buf will point to the current buffer.
1338 *
1339 * Returns zero on a successful receive, or an error. The receive state in
1340 * the TCP_Server_Info will also be updated.
1341 */
1342typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1343			    struct mid_q_entry *mid);
1344
1345/*
1346 * This is the prototype for the mid callback function. This is called once the
1347 * mid has been received off of the socket. When creating one, take special
1348 * care to avoid deadlocks. Things to bear in mind:
1349 *
1350 * - it will be called by cifsd, with no locks held
1351 * - the mid will be removed from any lists
1352 */
1353typedef void (mid_callback_t)(struct mid_q_entry *mid);
1354
1355/*
1356 * This is the protopyte for mid handle function. This is called once the mid
1357 * has been recognized after decryption of the message.
1358 */
1359typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1360			    struct mid_q_entry *mid);
1361
1362/* one of these for every pending CIFS request to the server */
1363struct mid_q_entry {
1364	struct list_head qhead;	/* mids waiting on reply from this server */
1365	struct TCP_Server_Info *server;	/* server corresponding to this mid */
1366	__u64 mid;		/* multiplex id */
1367	__u32 pid;		/* process id */
1368	__u32 sequence_number;  /* for CIFS signing */
1369	unsigned long when_alloc;  /* when mid was created */
1370#ifdef CONFIG_CIFS_STATS2
1371	unsigned long when_sent; /* time when smb send finished */
1372	unsigned long when_received; /* when demux complete (taken off wire) */
1373#endif
1374	mid_receive_t *receive; /* call receive callback */
1375	mid_callback_t *callback; /* call completion callback */
1376	mid_handle_t *handle; /* call handle mid callback */
1377	void *callback_data;	  /* general purpose pointer for callback */
1378	void *resp_buf;		/* pointer to received SMB header */
1379	unsigned int resp_buf_size;
1380	int mid_state;	/* wish this were enum but can not pass to wait_event */
1381	unsigned int mid_flags;
1382	__le16 command;		/* smb command code */
1383	bool large_buf:1;	/* if valid response, is pointer to large buf */
1384	bool multiRsp:1;	/* multiple trans2 responses for one request  */
1385	bool multiEnd:1;	/* both received */
1386	bool decrypted:1;	/* decrypted entry */
1387};
1388
1389struct close_cancelled_open {
1390	struct cifs_fid         fid;
1391	struct cifs_tcon        *tcon;
1392	struct work_struct      work;
1393};
1394
1395/*	Make code in transport.c a little cleaner by moving
1396	update of optional stats into function below */
1397#ifdef CONFIG_CIFS_STATS2
1398
1399static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1400{
1401	atomic_inc(&server->in_send);
1402}
1403
1404static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1405{
1406	atomic_dec(&server->in_send);
1407}
1408
1409static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1410{
1411	atomic_inc(&server->num_waiters);
1412}
1413
1414static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1415{
1416	atomic_dec(&server->num_waiters);
1417}
1418
1419static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1420{
1421	mid->when_sent = jiffies;
1422}
1423#else
1424static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1425{
1426}
1427static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1428{
1429}
1430
1431static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1432{
1433}
1434
1435static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1436{
1437}
1438
1439static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1440{
1441}
1442#endif
1443
1444/* for pending dnotify requests */
1445struct dir_notify_req {
1446	struct list_head lhead;
1447	__le16 Pid;
1448	__le16 PidHigh;
1449	__u16 Mid;
1450	__u16 Tid;
1451	__u16 Uid;
1452	__u16 netfid;
1453	__u32 filter; /* CompletionFilter (for multishot) */
1454	int multishot;
1455	struct file *pfile;
1456};
1457
1458struct dfs_info3_param {
1459	int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1460	int path_consumed;
1461	int server_type;
1462	int ref_flag;
1463	char *path_name;
1464	char *node_name;
1465};
1466
1467/*
1468 * common struct for holding inode info when searching for or updating an
1469 * inode with new info
1470 */
1471
1472#define CIFS_FATTR_DFS_REFERRAL		0x1
1473#define CIFS_FATTR_DELETE_PENDING	0x2
1474#define CIFS_FATTR_NEED_REVAL		0x4
1475#define CIFS_FATTR_INO_COLLISION	0x8
1476#define CIFS_FATTR_UNKNOWN_NLINK	0x10
1477#define CIFS_FATTR_FAKE_ROOT_INO	0x20
1478
1479struct cifs_fattr {
1480	u32		cf_flags;
1481	u32		cf_cifsattrs;
1482	u64		cf_uniqueid;
1483	u64		cf_eof;
1484	u64		cf_bytes;
1485	u64		cf_createtime;
1486	kuid_t		cf_uid;
1487	kgid_t		cf_gid;
1488	umode_t		cf_mode;
1489	dev_t		cf_rdev;
1490	unsigned int	cf_nlink;
1491	unsigned int	cf_dtype;
1492	struct timespec	cf_atime;
1493	struct timespec	cf_mtime;
1494	struct timespec	cf_ctime;
1495};
1496
1497static inline void free_dfs_info_param(struct dfs_info3_param *param)
1498{
1499	if (param) {
1500		kfree(param->path_name);
1501		kfree(param->node_name);
1502		kfree(param);
1503	}
1504}
1505
1506static inline void free_dfs_info_array(struct dfs_info3_param *param,
1507				       int number_of_items)
1508{
1509	int i;
1510	if ((number_of_items == 0) || (param == NULL))
1511		return;
1512	for (i = 0; i < number_of_items; i++) {
1513		kfree(param[i].path_name);
1514		kfree(param[i].node_name);
1515	}
1516	kfree(param);
1517}
1518
1519#define   MID_FREE 0
1520#define   MID_REQUEST_ALLOCATED 1
1521#define   MID_REQUEST_SUBMITTED 2
1522#define   MID_RESPONSE_RECEIVED 4
1523#define   MID_RETRY_NEEDED      8 /* session closed while this request out */
1524#define   MID_RESPONSE_MALFORMED 0x10
1525#define   MID_SHUTDOWN		 0x20
1526
1527/* Flags */
1528#define   MID_WAIT_CANCELLED	 1 /* Cancelled while waiting for response */
1529
1530/* Types of response buffer returned from SendReceive2 */
1531#define   CIFS_NO_BUFFER        0    /* Response buffer not returned */
1532#define   CIFS_SMALL_BUFFER     1
1533#define   CIFS_LARGE_BUFFER     2
1534#define   CIFS_IOVEC            4    /* array of response buffers */
1535
1536/* Type of Request to SendReceive2 */
1537#define   CIFS_BLOCKING_OP      1    /* operation can block */
1538#define   CIFS_ASYNC_OP         2    /* do not wait for response */
1539#define   CIFS_TIMEOUT_MASK 0x003    /* only one of above set in req */
1540#define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
1541#define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
1542#define   CIFS_NO_RESP      0x040    /* no response buffer required */
1543
1544/* Type of request operation */
1545#define   CIFS_ECHO_OP      0x080    /* echo request */
1546#define   CIFS_OBREAK_OP   0x0100    /* oplock break request */
1547#define   CIFS_NEG_OP      0x0200    /* negotiate request */
1548#define   CIFS_OP_MASK     0x0380    /* mask request type */
1549
1550#define   CIFS_HAS_CREDITS 0x0400    /* already has credits */
1551#define   CIFS_TRANSFORM_REQ 0x0800    /* transform request before sending */
1552
1553/* Security Flags: indicate type of session setup needed */
1554#define   CIFSSEC_MAY_SIGN	0x00001
1555#define   CIFSSEC_MAY_NTLM	0x00002
1556#define   CIFSSEC_MAY_NTLMV2	0x00004
1557#define   CIFSSEC_MAY_KRB5	0x00008
1558#ifdef CONFIG_CIFS_WEAK_PW_HASH
1559#define   CIFSSEC_MAY_LANMAN	0x00010
1560#define   CIFSSEC_MAY_PLNTXT	0x00020
1561#else
1562#define   CIFSSEC_MAY_LANMAN    0
1563#define   CIFSSEC_MAY_PLNTXT    0
1564#endif /* weak passwords */
1565#define   CIFSSEC_MAY_SEAL	0x00040 /* not supported yet */
1566#define   CIFSSEC_MAY_NTLMSSP	0x00080 /* raw ntlmssp with ntlmv2 */
1567
1568#define   CIFSSEC_MUST_SIGN	0x01001
1569/* note that only one of the following can be set so the
1570result of setting MUST flags more than once will be to
1571require use of the stronger protocol */
1572#define   CIFSSEC_MUST_NTLM	0x02002
1573#define   CIFSSEC_MUST_NTLMV2	0x04004
1574#define   CIFSSEC_MUST_KRB5	0x08008
1575#ifdef CONFIG_CIFS_WEAK_PW_HASH
1576#define   CIFSSEC_MUST_LANMAN	0x10010
1577#define   CIFSSEC_MUST_PLNTXT	0x20020
1578#ifdef CONFIG_CIFS_UPCALL
1579#define   CIFSSEC_MASK          0xBF0BF /* allows weak security but also krb5 */
1580#else
1581#define   CIFSSEC_MASK          0xB70B7 /* current flags supported if weak */
1582#endif /* UPCALL */
1583#else /* do not allow weak pw hash */
1584#define   CIFSSEC_MUST_LANMAN	0
1585#define   CIFSSEC_MUST_PLNTXT	0
1586#ifdef CONFIG_CIFS_UPCALL
1587#define   CIFSSEC_MASK          0x8F08F /* flags supported if no weak allowed */
1588#else
1589#define	  CIFSSEC_MASK          0x87087 /* flags supported if no weak allowed */
1590#endif /* UPCALL */
1591#endif /* WEAK_PW_HASH */
1592#define   CIFSSEC_MUST_SEAL	0x40040 /* not supported yet */
1593#define   CIFSSEC_MUST_NTLMSSP	0x80080 /* raw ntlmssp with ntlmv2 */
1594
1595#define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1596#define   CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1597#define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1598/*
1599 *****************************************************************
1600 * All constants go here
1601 *****************************************************************
1602 */
1603
1604#define UID_HASH (16)
1605
1606/*
1607 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1608 * following to be declared.
1609 */
1610
1611/****************************************************************************
1612 *  Locking notes.  All updates to global variables and lists should be
1613 *                  protected by spinlocks or semaphores.
1614 *
1615 *  Spinlocks
1616 *  ---------
1617 *  GlobalMid_Lock protects:
1618 *	list operations on pending_mid_q and oplockQ
1619 *      updates to XID counters, multiplex id  and SMB sequence numbers
1620 *  tcp_ses_lock protects:
1621 *	list operations on tcp and SMB session lists
1622 *  tcon->open_file_lock protects the list of open files hanging off the tcon
1623 *  cfile->file_info_lock protects counters and fields in cifs file struct
1624 *  f_owner.lock protects certain per file struct operations
1625 *  mapping->page_lock protects certain per page operations
1626 *
1627 *  Semaphores
1628 *  ----------
1629 *  sesSem     operations on smb session
1630 *  tconSem    operations on tree connection
1631 *  fh_sem      file handle reconnection operations
1632 *
1633 ****************************************************************************/
1634
1635#ifdef DECLARE_GLOBALS_HERE
1636#define GLOBAL_EXTERN
1637#else
1638#define GLOBAL_EXTERN extern
1639#endif
1640
1641/*
1642 * the list of TCP_Server_Info structures, ie each of the sockets
1643 * connecting our client to a distinct server (ip address), is
1644 * chained together by cifs_tcp_ses_list. The list of all our SMB
1645 * sessions (and from that the tree connections) can be found
1646 * by iterating over cifs_tcp_ses_list
1647 */
1648GLOBAL_EXTERN struct list_head		cifs_tcp_ses_list;
1649
1650/*
1651 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1652 * tcp session, and the list of tcon's per smb session. It also protects
1653 * the reference counters for the server, smb session, and tcon. Finally,
1654 * changes to the tcon->tidStatus should be done while holding this lock.
1655 * generally the locks should be taken in order tcp_ses_lock before
1656 * tcon->open_file_lock and that before file->file_info_lock since the
1657 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1658 */
1659GLOBAL_EXTERN spinlock_t		cifs_tcp_ses_lock;
1660
1661#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1662/* Outstanding dir notify requests */
1663GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1664/* DirNotify response queue */
1665GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1666#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1667
1668/*
1669 * Global transaction id (XID) information
1670 */
1671GLOBAL_EXTERN unsigned int GlobalCurrentXid;	/* protected by GlobalMid_Sem */
1672GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1673GLOBAL_EXTERN unsigned int GlobalMaxActiveXid;	/* prot by GlobalMid_Sem */
1674GLOBAL_EXTERN spinlock_t GlobalMid_Lock;  /* protects above & list operations */
1675					  /* on midQ entries */
1676/*
1677 *  Global counters, updated atomically
1678 */
1679GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1680GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1681GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1682GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1683GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1684
1685/* Various Debug counters */
1686GLOBAL_EXTERN atomic_t bufAllocCount;    /* current number allocated  */
1687#ifdef CONFIG_CIFS_STATS2
1688GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1689GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1690#endif
1691GLOBAL_EXTERN atomic_t smBufAllocCount;
1692GLOBAL_EXTERN atomic_t midCount;
1693
1694/* Misc globals */
1695GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1696GLOBAL_EXTERN bool lookupCacheEnabled;
1697GLOBAL_EXTERN unsigned int global_secflags;	/* if on, session setup sent
1698				with more secure ntlmssp2 challenge/resp */
1699GLOBAL_EXTERN unsigned int sign_CIFS_PDUs;  /* enable smb packet signing */
1700GLOBAL_EXTERN bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1701GLOBAL_EXTERN unsigned int CIFSMaxBufSize;  /* max size not including hdr */
1702GLOBAL_EXTERN unsigned int cifs_min_rcv;    /* min size of big ntwrk buf pool */
1703GLOBAL_EXTERN unsigned int cifs_min_small;  /* min size of small buf pool */
1704GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1705
1706#ifdef CONFIG_CIFS_ACL
1707GLOBAL_EXTERN struct rb_root uidtree;
1708GLOBAL_EXTERN struct rb_root gidtree;
1709GLOBAL_EXTERN spinlock_t siduidlock;
1710GLOBAL_EXTERN spinlock_t sidgidlock;
1711GLOBAL_EXTERN struct rb_root siduidtree;
1712GLOBAL_EXTERN struct rb_root sidgidtree;
1713GLOBAL_EXTERN spinlock_t uidsidlock;
1714GLOBAL_EXTERN spinlock_t gidsidlock;
1715#endif /* CONFIG_CIFS_ACL */
1716
1717void cifs_oplock_break(struct work_struct *work);
1718
1719extern const struct slow_work_ops cifs_oplock_break_ops;
1720extern struct workqueue_struct *cifsiod_wq;
1721extern struct workqueue_struct *cifsoplockd_wq;
1722extern __u32 cifs_lock_secret;
1723
1724extern mempool_t *cifs_mid_poolp;
1725
1726/* Operations for different SMB versions */
1727#define SMB1_VERSION_STRING	"1.0"
1728extern struct smb_version_operations smb1_operations;
1729extern struct smb_version_values smb1_values;
1730#define SMB20_VERSION_STRING	"2.0"
1731extern struct smb_version_operations smb20_operations;
1732extern struct smb_version_values smb20_values;
1733#define SMB21_VERSION_STRING	"2.1"
1734extern struct smb_version_operations smb21_operations;
1735extern struct smb_version_values smb21_values;
1736#define SMBDEFAULT_VERSION_STRING "default"
1737extern struct smb_version_values smbdefault_values;
1738#define SMB3ANY_VERSION_STRING "3"
1739extern struct smb_version_values smb3any_values;
1740#define SMB30_VERSION_STRING	"3.0"
1741extern struct smb_version_operations smb30_operations;
1742extern struct smb_version_values smb30_values;
1743#define SMB302_VERSION_STRING	"3.02"
1744/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1745extern struct smb_version_values smb302_values;
1746#define SMB311_VERSION_STRING	"3.1.1"
1747#define ALT_SMB311_VERSION_STRING "3.11"
1748extern struct smb_version_operations smb311_operations;
1749extern struct smb_version_values smb311_values;
1750#endif	/* _CIFS_GLOB_H */