1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2020, Microsoft Corporation. 4 * 5 * Author(s): Steve French <stfrench@microsoft.com> 6 * David Howells <dhowells@redhat.com> 7 */ 8 9 #ifndef _FS_CONTEXT_H 10 #define _FS_CONTEXT_H 11 12 #include "cifsglob.h" 13 #include <linux/parser.h> 14 #include <linux/fs_parser.h> 15 16 /* Log errors in fs_context (new mount api) but also in dmesg (old style) */ 17 #define cifs_errorf(fc, fmt, ...) \ 18 do { \ 19 errorf(fc, fmt, ## __VA_ARGS__); \ 20 cifs_dbg(VFS, fmt, ## __VA_ARGS__); \ 21 } while (0) 22 23 static inline size_t cifs_io_align(struct fs_context *fc, 24 const char *name, size_t size) 25 { 26 if (!size || !IS_ALIGNED(size, PAGE_SIZE)) { 27 cifs_errorf(fc, "unaligned %s, making it a multiple of %lu bytes\n", 28 name, PAGE_SIZE); 29 size = umax(round_down(size, PAGE_SIZE), PAGE_SIZE); 30 } 31 return size; 32 } 33 34 #define CIFS_ALIGN_WSIZE(_fc, _size) cifs_io_align(_fc, "wsize", _size) 35 #define CIFS_ALIGN_RSIZE(_fc, _size) cifs_io_align(_fc, "rsize", _size) 36 #define CIFS_ALIGN_BSIZE(_fc, _size) cifs_io_align(_fc, "bsize", _size) 37 38 enum smb_version { 39 Smb_1 = 1, 40 Smb_20, 41 Smb_21, 42 Smb_30, 43 Smb_302, 44 Smb_311, 45 Smb_3any, 46 Smb_default, 47 Smb_version_err 48 }; 49 50 enum { 51 Opt_cache_loose, 52 Opt_cache_strict, 53 Opt_cache_none, 54 Opt_cache_ro, 55 Opt_cache_rw, 56 Opt_cache_err 57 }; 58 59 enum cifs_reparse_parm { 60 Opt_reparse_default, 61 Opt_reparse_none, 62 Opt_reparse_nfs, 63 Opt_reparse_wsl, 64 Opt_reparse_err 65 }; 66 67 enum cifs_symlink_parm { 68 Opt_symlink_default, 69 Opt_symlink_none, 70 Opt_symlink_native, 71 Opt_symlink_unix, 72 Opt_symlink_mfsymlinks, 73 Opt_symlink_sfu, 74 Opt_symlink_nfs, 75 Opt_symlink_wsl, 76 Opt_symlink_err 77 }; 78 79 enum cifs_sec_param { 80 Opt_sec_krb5, 81 Opt_sec_krb5i, 82 Opt_sec_krb5p, 83 Opt_sec_ntlmsspi, 84 Opt_sec_ntlmssp, 85 Opt_sec_ntlmv2, 86 Opt_sec_ntlmv2i, 87 Opt_sec_none, 88 89 Opt_sec_err 90 }; 91 92 enum cifs_upcall_target_param { 93 Opt_upcall_target_mount, 94 Opt_upcall_target_application, 95 Opt_upcall_target_err 96 }; 97 98 enum cifs_param { 99 /* Mount options that take no arguments */ 100 Opt_user_xattr, 101 Opt_forceuid, 102 Opt_forcegid, 103 Opt_noblocksend, 104 Opt_noautotune, 105 Opt_nolease, 106 Opt_nosparse, 107 Opt_hard, 108 Opt_soft, 109 Opt_perm, 110 Opt_nodelete, 111 Opt_mapposix, 112 Opt_mapchars, 113 Opt_nomapchars, 114 Opt_sfu, 115 Opt_nodfs, 116 Opt_posixpaths, 117 Opt_unix, 118 Opt_nocase, 119 Opt_brl, 120 Opt_handlecache, 121 Opt_forcemandatorylock, 122 Opt_setuidfromacl, 123 Opt_setuids, 124 Opt_dynperm, 125 Opt_intr, 126 Opt_strictsync, 127 Opt_serverino, 128 Opt_rwpidforward, 129 Opt_cifsacl, 130 Opt_acl, 131 Opt_locallease, 132 Opt_sign, 133 Opt_ignore_signature, 134 Opt_seal, 135 Opt_noac, 136 Opt_fsc, 137 Opt_mfsymlinks, 138 Opt_multiuser, 139 Opt_sloppy, 140 Opt_nosharesock, 141 Opt_persistent, 142 Opt_resilient, 143 Opt_tcp_nodelay, 144 Opt_domainauto, 145 Opt_rdma, 146 Opt_modesid, 147 Opt_rootfs, 148 Opt_multichannel, 149 Opt_compress, 150 Opt_witness, 151 Opt_is_upcall_target_mount, 152 Opt_is_upcall_target_application, 153 Opt_unicode, 154 155 /* Mount options which take numeric value */ 156 Opt_backupuid, 157 Opt_backupgid, 158 Opt_uid, 159 Opt_cruid, 160 Opt_gid, 161 Opt_port, 162 Opt_file_mode, 163 Opt_dirmode, 164 Opt_min_enc_offload, 165 Opt_retrans, 166 Opt_blocksize, 167 Opt_rasize, 168 Opt_rsize, 169 Opt_wsize, 170 Opt_actimeo, 171 Opt_acdirmax, 172 Opt_acregmax, 173 Opt_closetimeo, 174 Opt_echo_interval, 175 Opt_max_credits, 176 Opt_max_cached_dirs, 177 Opt_snapshot, 178 Opt_max_channels, 179 Opt_handletimeout, 180 181 /* Mount options which take string value */ 182 Opt_source, 183 Opt_user, 184 Opt_pass, 185 Opt_pass2, 186 Opt_ip, 187 Opt_domain, 188 Opt_srcaddr, 189 Opt_iocharset, 190 Opt_netbiosname, 191 Opt_servern, 192 Opt_nbsessinit, 193 Opt_ver, 194 Opt_vers, 195 Opt_sec, 196 Opt_cache, 197 Opt_reparse, 198 Opt_upcalltarget, 199 Opt_nativesocket, 200 Opt_symlink, 201 Opt_symlinkroot, 202 203 /* Mount options to be ignored */ 204 Opt_ignore, 205 206 Opt_err 207 }; 208 209 struct smb3_fs_context { 210 bool forceuid_specified; 211 bool forcegid_specified; 212 bool uid_specified; 213 bool cruid_specified; 214 bool gid_specified; 215 bool sloppy; 216 bool got_ip; 217 bool got_version; 218 bool got_rsize; 219 bool got_wsize; 220 bool got_bsize; 221 unsigned short port; 222 223 char *username; 224 char *password; 225 char *password2; 226 char *domainname; 227 char *source; 228 char *server_hostname; 229 char *UNC; 230 char *nodename; 231 char workstation_name[CIFS_MAX_WORKSTATION_LEN]; 232 char *iocharset; /* local code page for mapping to and from Unicode */ 233 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */ 234 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */ 235 int rfc1001_sessinit; 236 kuid_t cred_uid; 237 kuid_t linux_uid; 238 kgid_t linux_gid; 239 kuid_t backupuid; 240 kgid_t backupgid; 241 umode_t file_mode; 242 umode_t dir_mode; 243 enum securityEnum sectype; /* sectype requested via mnt opts */ 244 enum upcall_target_enum upcall_target; /* where to upcall for mount */ 245 bool sign; /* was signing requested via mnt opts? */ 246 bool ignore_signature:1; 247 bool retry:1; 248 bool intr:1; 249 bool setuids:1; 250 bool setuidfromacl:1; 251 bool override_uid:1; 252 bool override_gid:1; 253 bool dynperm:1; 254 bool noperm:1; 255 bool nodelete:1; 256 bool mode_ace:1; 257 bool no_psx_acl:1; /* set if posix acl support should be disabled */ 258 bool cifs_acl:1; 259 bool backupuid_specified; /* mount option backupuid is specified */ 260 bool backupgid_specified; /* mount option backupgid is specified */ 261 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/ 262 bool server_ino:1; /* use inode numbers from server ie UniqueId */ 263 bool direct_io:1; 264 bool strict_io:1; /* strict cache behavior */ 265 bool cache_ro:1; 266 bool cache_rw:1; 267 bool remap:1; /* set to remap seven reserved chars in filenames */ 268 bool sfu_remap:1; /* remap seven reserved chars ala SFU */ 269 bool posix_paths:1; /* unset to not ask for posix pathnames. */ 270 bool no_linux_ext:1; 271 bool linux_ext:1; 272 bool sfu_emul:1; 273 bool nullauth:1; /* attempt to authenticate with null user */ 274 bool nocase:1; /* request case insensitive filenames */ 275 bool nobrl:1; /* disable sending byte range locks to srv */ 276 bool nohandlecache:1; /* disable caching dir handles if srvr probs */ 277 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */ 278 bool seal:1; /* request transport encryption on share */ 279 bool nodfs:1; /* Do not request DFS, even if available */ 280 bool local_lease:1; /* check leases only on local system, not remote */ 281 bool noblocksnd:1; 282 bool noautotune:1; 283 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */ 284 bool no_lease:1; /* disable requesting leases */ 285 bool no_sparse:1; /* do not attempt to set files sparse */ 286 bool fsc:1; /* enable fscache */ 287 bool mfsymlinks:1; /* use Minshall+French Symlinks */ 288 bool multiuser:1; 289 bool rwpidforward:1; /* pid forward for read/write operations */ 290 bool nosharesock:1; 291 bool persistent:1; 292 bool nopersistent:1; 293 bool resilient:1; /* noresilient not required since not fored for CA */ 294 bool domainauto:1; 295 bool rdma:1; 296 bool multichannel:1; 297 bool use_client_guid:1; 298 /* reuse existing guid for multichannel */ 299 u8 client_guid[SMB2_CLIENT_GUID_SIZE]; 300 /* User-specified original r/wsize value */ 301 unsigned int vol_rsize; 302 unsigned int vol_wsize; 303 unsigned int bsize; 304 unsigned int rasize; 305 unsigned int rsize; 306 unsigned int wsize; 307 unsigned int min_offload; 308 unsigned int retrans; 309 bool sockopt_tcp_nodelay:1; 310 /* attribute cache timeout for files and directories in jiffies */ 311 unsigned long acregmax; 312 unsigned long acdirmax; 313 /* timeout for deferred close of files in jiffies */ 314 unsigned long closetimeo; 315 struct smb_version_operations *ops; 316 struct smb_version_values *vals; 317 char *prepath; 318 struct sockaddr_storage dstaddr; /* destination address */ 319 struct sockaddr_storage srcaddr; /* allow binding to a local IP */ 320 struct nls_table *local_nls; /* This is a copy of the pointer in cifs_sb */ 321 unsigned int echo_interval; /* echo interval in secs */ 322 __u64 snapshot_time; /* needed for timewarp tokens */ 323 __u32 handle_timeout; /* persistent and durable handle timeout in ms */ 324 unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */ 325 unsigned int max_channels; 326 unsigned int max_cached_dirs; 327 bool compress; /* enable SMB2 messages (READ/WRITE) de/compression */ 328 bool rootfs:1; /* if it's a SMB root file system */ 329 bool witness:1; /* use witness protocol */ 330 int unicode; 331 char *leaf_fullpath; 332 struct cifs_ses *dfs_root_ses; 333 bool dfs_automount:1; /* set for dfs automount only */ 334 enum cifs_reparse_type reparse_type; 335 enum cifs_symlink_type symlink_type; 336 bool nonativesocket:1; 337 bool dfs_conn:1; /* set for dfs mounts */ 338 char *dns_dom; 339 char *symlinkroot; /* top level directory for native SMB symlinks in absolute format */ 340 }; 341 342 extern const struct fs_parameter_spec smb3_fs_parameters[]; 343 344 extern enum cifs_symlink_type get_cifs_symlink_type(struct cifs_sb_info *cifs_sb); 345 346 extern int smb3_init_fs_context(struct fs_context *fc); 347 extern void smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx); 348 extern void smb3_cleanup_fs_context(struct smb3_fs_context *ctx); 349 350 static inline struct smb3_fs_context *smb3_fc2context(const struct fs_context *fc) 351 { 352 return fc->fs_private; 353 } 354 355 extern int smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx); 356 extern int smb3_sync_session_ctx_passwords(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses); 357 extern void smb3_update_mnt_flags(struct cifs_sb_info *cifs_sb); 358 359 /* 360 * max deferred close timeout (jiffies) - 2^30 361 */ 362 #define SMB3_MAX_DCLOSETIMEO (1 << 30) 363 #define SMB3_DEF_DCLOSETIMEO (1 * HZ) /* even 1 sec enough to help eg open/write/close/open/read */ 364 #define MAX_CACHED_FIDS 16 365 extern char *cifs_sanitize_prepath(char *prepath, gfp_t gfp); 366 367 extern struct mutex cifs_mount_mutex; 368 369 static inline void cifs_mount_lock(void) 370 { 371 mutex_lock(&cifs_mount_mutex); 372 } 373 374 static inline void cifs_mount_unlock(void) 375 { 376 mutex_unlock(&cifs_mount_mutex); 377 } 378 379 static inline void cifs_negotiate_rsize(struct TCP_Server_Info *server, 380 struct smb3_fs_context *ctx, 381 struct cifs_tcon *tcon) 382 { 383 unsigned int size; 384 385 size = umax(server->ops->negotiate_rsize(tcon, ctx), PAGE_SIZE); 386 if (ctx->rsize) 387 size = umax(umin(ctx->rsize, size), PAGE_SIZE); 388 ctx->rsize = round_down(size, PAGE_SIZE); 389 } 390 391 static inline void cifs_negotiate_wsize(struct TCP_Server_Info *server, 392 struct smb3_fs_context *ctx, 393 struct cifs_tcon *tcon) 394 { 395 unsigned int size; 396 397 size = umax(server->ops->negotiate_wsize(tcon, ctx), PAGE_SIZE); 398 if (ctx->wsize) 399 size = umax(umin(ctx->wsize, size), PAGE_SIZE); 400 ctx->wsize = round_down(size, PAGE_SIZE); 401 } 402 403 static inline void cifs_negotiate_iosize(struct TCP_Server_Info *server, 404 struct smb3_fs_context *ctx, 405 struct cifs_tcon *tcon) 406 { 407 cifs_negotiate_rsize(server, ctx, tcon); 408 cifs_negotiate_wsize(server, ctx, tcon); 409 } 410 411 #endif 412