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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * 9P protocol definitions. * * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net> * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> */ #ifndef NET_9P_H #define NET_9P_H /** * enum p9_debug_flags - bits for mount time debug parameter * @P9_DEBUG_ERROR: more verbose error messages including original error string * @P9_DEBUG_9P: 9P protocol tracing * @P9_DEBUG_VFS: VFS API tracing * @P9_DEBUG_CONV: protocol conversion tracing * @P9_DEBUG_MUX: trace management of concurrent transactions * @P9_DEBUG_TRANS: transport tracing * @P9_DEBUG_SLABS: memory management tracing * @P9_DEBUG_FCALL: verbose dump of protocol messages * @P9_DEBUG_FID: fid allocation/deallocation tracking * @P9_DEBUG_PKT: packet marshalling/unmarshalling * @P9_DEBUG_FSC: FS-cache tracing * @P9_DEBUG_VPKT: Verbose packet debugging (full packet dump) * * These flags are passed at mount time to turn on various levels of * verbosity and tracing which will be output to the system logs. */ enum p9_debug_flags { P9_DEBUG_ERROR = (1<<0), P9_DEBUG_9P = (1<<2), P9_DEBUG_VFS = (1<<3), P9_DEBUG_CONV = (1<<4), P9_DEBUG_MUX = (1<<5), P9_DEBUG_TRANS = (1<<6), P9_DEBUG_SLABS = (1<<7), P9_DEBUG_FCALL = (1<<8), P9_DEBUG_FID = (1<<9), P9_DEBUG_PKT = (1<<10), P9_DEBUG_FSC = (1<<11), P9_DEBUG_VPKT = (1<<12), P9_DEBUG_CACHE = (1<<13), P9_DEBUG_MMAP = (1<<14), }; #ifdef CONFIG_NET_9P_DEBUG extern unsigned int p9_debug_level; __printf(3, 4) void _p9_debug(enum p9_debug_flags level, const char *func, const char *fmt, ...); #define p9_debug(level, fmt, ...) \ _p9_debug(level, __func__, fmt, ##__VA_ARGS__) #else #define p9_debug(level, fmt, ...) \ no_printk(fmt, ##__VA_ARGS__) #endif /** * enum p9_msg_t - 9P message types * @P9_TLERROR: not used * @P9_RLERROR: response for any failed request for 9P2000.L * @P9_TSTATFS: file system status request * @P9_RSTATFS: file system status response * @P9_TSYMLINK: make symlink request * @P9_RSYMLINK: make symlink response * @P9_TMKNOD: create a special file object request * @P9_RMKNOD: create a special file object response * @P9_TLCREATE: prepare a handle for I/O on an new file for 9P2000.L * @P9_RLCREATE: response with file access information for 9P2000.L * @P9_TRENAME: rename request * @P9_RRENAME: rename response * @P9_TMKDIR: create a directory request * @P9_RMKDIR: create a directory response * @P9_TVERSION: version handshake request * @P9_RVERSION: version handshake response * @P9_TAUTH: request to establish authentication channel * @P9_RAUTH: response with authentication information * @P9_TATTACH: establish user access to file service * @P9_RATTACH: response with top level handle to file hierarchy * @P9_TERROR: not used * @P9_RERROR: response for any failed request * @P9_TFLUSH: request to abort a previous request * @P9_RFLUSH: response when previous request has been cancelled * @P9_TWALK: descend a directory hierarchy * @P9_RWALK: response with new handle for position within hierarchy * @P9_TOPEN: prepare a handle for I/O on an existing file * @P9_ROPEN: response with file access information * @P9_TCREATE: prepare a handle for I/O on a new file * @P9_RCREATE: response with file access information * @P9_TREAD: request to transfer data from a file or directory * @P9_RREAD: response with data requested * @P9_TWRITE: reuqest to transfer data to a file * @P9_RWRITE: response with out much data was transferred to file * @P9_TCLUNK: forget about a handle to an entity within the file system * @P9_RCLUNK: response when server has forgotten about the handle * @P9_TREMOVE: request to remove an entity from the hierarchy * @P9_RREMOVE: response when server has removed the entity * @P9_TSTAT: request file entity attributes * @P9_RSTAT: response with file entity attributes * @P9_TWSTAT: request to update file entity attributes * @P9_RWSTAT: response when file entity attributes are updated * * There are 14 basic operations in 9P2000, paired as * requests and responses. The one special case is ERROR * as there is no @P9_TERROR request for clients to transmit to * the server, but the server may respond to any other request * with an @P9_RERROR. * * See Also: http://plan9.bell-labs.com/sys/man/5/INDEX.html */ enum p9_msg_t { P9_TLERROR = 6, P9_RLERROR, P9_TSTATFS = 8, P9_RSTATFS, P9_TLOPEN = 12, P9_RLOPEN, P9_TLCREATE = 14, P9_RLCREATE, P9_TSYMLINK = 16, P9_RSYMLINK, P9_TMKNOD = 18, P9_RMKNOD, P9_TRENAME = 20, P9_RRENAME, P9_TREADLINK = 22, P9_RREADLINK, P9_TGETATTR = 24, P9_RGETATTR, P9_TSETATTR = 26, P9_RSETATTR, P9_TXATTRWALK = 30, P9_RXATTRWALK, P9_TXATTRCREATE = 32, P9_RXATTRCREATE, P9_TREADDIR = 40, P9_RREADDIR, P9_TFSYNC = 50, P9_RFSYNC, P9_TLOCK = 52, P9_RLOCK, P9_TGETLOCK = 54, P9_RGETLOCK, P9_TLINK = 70, P9_RLINK, P9_TMKDIR = 72, P9_RMKDIR, P9_TRENAMEAT = 74, P9_RRENAMEAT, P9_TUNLINKAT = 76, P9_RUNLINKAT, P9_TVERSION = 100, P9_RVERSION, P9_TAUTH = 102, P9_RAUTH, P9_TATTACH = 104, P9_RATTACH, P9_TERROR = 106, P9_RERROR, P9_TFLUSH = 108, P9_RFLUSH, P9_TWALK = 110, P9_RWALK, P9_TOPEN = 112, P9_ROPEN, P9_TCREATE = 114, P9_RCREATE, P9_TREAD = 116, P9_RREAD, P9_TWRITE = 118, P9_RWRITE, P9_TCLUNK = 120, P9_RCLUNK, P9_TREMOVE = 122, P9_RREMOVE, P9_TSTAT = 124, P9_RSTAT, P9_TWSTAT = 126, P9_RWSTAT, }; /** * enum p9_open_mode_t - 9P open modes * @P9_OREAD: open file for reading only * @P9_OWRITE: open file for writing only * @P9_ORDWR: open file for reading or writing * @P9_OEXEC: open file for execution * @P9_OTRUNC: truncate file to zero-length before opening it * @P9_OREXEC: close the file when an exec(2) system call is made * @P9_ORCLOSE: remove the file when the file is closed * @P9_OAPPEND: open the file and seek to the end * @P9_OEXCL: only create a file, do not open it * * 9P open modes differ slightly from Posix standard modes. * In particular, there are extra modes which specify different * semantic behaviors than may be available on standard Posix * systems. For example, @P9_OREXEC and @P9_ORCLOSE are modes that * most likely will not be issued from the Linux VFS client, but may * be supported by servers. * * See Also: http://plan9.bell-labs.com/magic/man2html/2/open */ enum p9_open_mode_t { P9_OREAD = 0x00, P9_OWRITE = 0x01, P9_ORDWR = 0x02, P9_OEXEC = 0x03, P9_OTRUNC = 0x10, P9_OREXEC = 0x20, P9_ORCLOSE = 0x40, P9_OAPPEND = 0x80, P9_OEXCL = 0x1000, P9L_MODE_MASK = 0x1FFF, /* don't send anything under this to server */ P9L_DIRECT = 0x2000, /* cache disabled */ P9L_NOWRITECACHE = 0x4000, /* no write caching */ P9L_LOOSE = 0x8000, /* loose cache */ }; /** * enum p9_perm_t - 9P permissions * @P9_DMDIR: mode bit for directories * @P9_DMAPPEND: mode bit for is append-only * @P9_DMEXCL: mode bit for excluse use (only one open handle allowed) * @P9_DMMOUNT: mode bit for mount points * @P9_DMAUTH: mode bit for authentication file * @P9_DMTMP: mode bit for non-backed-up files * @P9_DMSYMLINK: mode bit for symbolic links (9P2000.u) * @P9_DMLINK: mode bit for hard-link (9P2000.u) * @P9_DMDEVICE: mode bit for device files (9P2000.u) * @P9_DMNAMEDPIPE: mode bit for named pipe (9P2000.u) * @P9_DMSOCKET: mode bit for socket (9P2000.u) * @P9_DMSETUID: mode bit for setuid (9P2000.u) * @P9_DMSETGID: mode bit for setgid (9P2000.u) * @P9_DMSETVTX: mode bit for sticky bit (9P2000.u) * * 9P permissions differ slightly from Posix standard modes. * * See Also: http://plan9.bell-labs.com/magic/man2html/2/stat */ enum p9_perm_t { P9_DMDIR = 0x80000000, P9_DMAPPEND = 0x40000000, P9_DMEXCL = 0x20000000, P9_DMMOUNT = 0x10000000, P9_DMAUTH = 0x08000000, P9_DMTMP = 0x04000000, /* 9P2000.u extensions */ P9_DMSYMLINK = 0x02000000, P9_DMLINK = 0x01000000, P9_DMDEVICE = 0x00800000, P9_DMNAMEDPIPE = 0x00200000, P9_DMSOCKET = 0x00100000, P9_DMSETUID = 0x00080000, P9_DMSETGID = 0x00040000, P9_DMSETVTX = 0x00010000, }; /* 9p2000.L open flags */ #define P9_DOTL_RDONLY 00000000 #define P9_DOTL_WRONLY 00000001 #define P9_DOTL_RDWR 00000002 #define P9_DOTL_NOACCESS 00000003 #define P9_DOTL_CREATE 00000100 #define P9_DOTL_EXCL 00000200 #define P9_DOTL_NOCTTY 00000400 #define P9_DOTL_TRUNC 00001000 #define P9_DOTL_APPEND 00002000 #define P9_DOTL_NONBLOCK 00004000 #define P9_DOTL_DSYNC 00010000 #define P9_DOTL_FASYNC 00020000 #define P9_DOTL_DIRECT 00040000 #define P9_DOTL_LARGEFILE 00100000 #define P9_DOTL_DIRECTORY 00200000 #define P9_DOTL_NOFOLLOW 00400000 #define P9_DOTL_NOATIME 01000000 #define P9_DOTL_CLOEXEC 02000000 #define P9_DOTL_SYNC 04000000 /* 9p2000.L at flags */ #define P9_DOTL_AT_REMOVEDIR 0x200 /* 9p2000.L lock type */ #define P9_LOCK_TYPE_RDLCK 0 #define P9_LOCK_TYPE_WRLCK 1 #define P9_LOCK_TYPE_UNLCK 2 /** * enum p9_qid_t - QID types * @P9_QTDIR: directory * @P9_QTAPPEND: append-only * @P9_QTEXCL: excluse use (only one open handle allowed) * @P9_QTMOUNT: mount points * @P9_QTAUTH: authentication file * @P9_QTTMP: non-backed-up files * @P9_QTSYMLINK: symbolic links (9P2000.u) * @P9_QTLINK: hard-link (9P2000.u) * @P9_QTFILE: normal files * * QID types are a subset of permissions - they are primarily * used to differentiate semantics for a file system entity via * a jump-table. Their value is also the most significant 16 bits * of the permission_t * * See Also: http://plan9.bell-labs.com/magic/man2html/2/stat */ enum p9_qid_t { P9_QTDIR = 0x80, P9_QTAPPEND = 0x40, P9_QTEXCL = 0x20, P9_QTMOUNT = 0x10, P9_QTAUTH = 0x08, P9_QTTMP = 0x04, P9_QTSYMLINK = 0x02, P9_QTLINK = 0x01, P9_QTFILE = 0x00, }; /* 9P Magic Numbers */ #define P9_NOTAG ((u16)(~0)) #define P9_NOFID ((u32)(~0)) #define P9_MAXWELEM 16 /* Minimal header size: size[4] type[1] tag[2] */ #define P9_HDRSZ 7 /* ample room for Twrite/Rread header */ #define P9_IOHDRSZ 24 /* Room for readdir header */ #define P9_READDIRHDRSZ 24 /* size of header for zero copy read/write */ #define P9_ZC_HDR_SZ 4096 /* maximum length of an error string */ #define P9_ERRMAX 128 /** * struct p9_qid - file system entity information * @type: 8-bit type &p9_qid_t * @version: 16-bit monotonically incrementing version number * @path: 64-bit per-server-unique ID for a file system element * * qids are identifiers used by 9P servers to track file system * entities. The type is used to differentiate semantics for operations * on the entity (ie. read means something different on a directory than * on a file). The path provides a server unique index for an entity * (roughly analogous to an inode number), while the version is updated * every time a file is modified and can be used to maintain cache * coherency between clients and serves. * Servers will often differentiate purely synthetic entities by setting * their version to 0, signaling that they should never be cached and * should be accessed synchronously. * * See Also://plan9.bell-labs.com/magic/man2html/2/stat */ struct p9_qid { u8 type; u32 version; u64 path; }; /** * struct p9_wstat - file system metadata information * @size: length prefix for this stat structure instance * @type: the type of the server (equivalent to a major number) * @dev: the sub-type of the server (equivalent to a minor number) * @qid: unique id from the server of type &p9_qid * @mode: Plan 9 format permissions of type &p9_perm_t * @atime: Last access/read time * @mtime: Last modify/write time * @length: file length * @name: last element of path (aka filename) * @uid: owner name * @gid: group owner * @muid: last modifier * @extension: area used to encode extended UNIX support * @n_uid: numeric user id of owner (part of 9p2000.u extension) * @n_gid: numeric group id (part of 9p2000.u extension) * @n_muid: numeric user id of laster modifier (part of 9p2000.u extension) * * See Also: http://plan9.bell-labs.com/magic/man2html/2/stat */ struct p9_wstat { u16 size; u16 type; u32 dev; struct p9_qid qid; u32 mode; u32 atime; u32 mtime; u64 length; const char *name; const char *uid; const char *gid; const char *muid; char *extension; /* 9p2000.u extensions */ kuid_t n_uid; /* 9p2000.u extensions */ kgid_t n_gid; /* 9p2000.u extensions */ kuid_t n_muid; /* 9p2000.u extensions */ }; struct p9_stat_dotl { u64 st_result_mask; struct p9_qid qid; u32 st_mode; kuid_t st_uid; kgid_t st_gid; u64 st_nlink; u64 st_rdev; u64 st_size; u64 st_blksize; u64 st_blocks; u64 st_atime_sec; u64 st_atime_nsec; u64 st_mtime_sec; u64 st_mtime_nsec; u64 st_ctime_sec; u64 st_ctime_nsec; u64 st_btime_sec; u64 st_btime_nsec; u64 st_gen; u64 st_data_version; }; #define P9_STATS_MODE 0x00000001ULL #define P9_STATS_NLINK 0x00000002ULL #define P9_STATS_UID 0x00000004ULL #define P9_STATS_GID 0x00000008ULL #define P9_STATS_RDEV 0x00000010ULL #define P9_STATS_ATIME 0x00000020ULL #define P9_STATS_MTIME 0x00000040ULL #define P9_STATS_CTIME 0x00000080ULL #define P9_STATS_INO 0x00000100ULL #define P9_STATS_SIZE 0x00000200ULL #define P9_STATS_BLOCKS 0x00000400ULL #define P9_STATS_BTIME 0x00000800ULL #define P9_STATS_GEN 0x00001000ULL #define P9_STATS_DATA_VERSION 0x00002000ULL #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ /** * struct p9_iattr_dotl - P9 inode attribute for setattr * @valid: bitfield specifying which fields are valid * same as in struct iattr * @mode: File permission bits * @uid: user id of owner * @gid: group id * @size: File size * @atime_sec: Last access time, seconds * @atime_nsec: Last access time, nanoseconds * @mtime_sec: Last modification time, seconds * @mtime_nsec: Last modification time, nanoseconds */ struct p9_iattr_dotl { u32 valid; u32 mode; kuid_t uid; kgid_t gid; u64 size; u64 atime_sec; u64 atime_nsec; u64 mtime_sec; u64 mtime_nsec; }; #define P9_LOCK_SUCCESS 0 #define P9_LOCK_BLOCKED 1 #define P9_LOCK_ERROR 2 #define P9_LOCK_GRACE 3 #define P9_LOCK_FLAGS_BLOCK 1 #define P9_LOCK_FLAGS_RECLAIM 2 /* struct p9_flock: POSIX lock structure * @type - type of lock * @flags - lock flags * @start - starting offset of the lock * @length - number of bytes * @proc_id - process id which wants to take lock * @client_id - client id */ struct p9_flock { u8 type; u32 flags; u64 start; u64 length; u32 proc_id; char *client_id; }; /* struct p9_getlock: getlock structure * @type - type of lock * @start - starting offset of the lock * @length - number of bytes * @proc_id - process id which wants to take lock * @client_id - client id */ struct p9_getlock { u8 type; u64 start; u64 length; u32 proc_id; char *client_id; }; struct p9_rstatfs { u32 type; u32 bsize; u64 blocks; u64 bfree; u64 bavail; u64 files; u64 ffree; u64 fsid; u32 namelen; }; /** * struct p9_fcall - primary packet structure * @size: prefixed length of the structure * @id: protocol operating identifier of type &p9_msg_t * @tag: transaction id of the request * @offset: used by marshalling routines to track current position in buffer * @capacity: used by marshalling routines to track total malloc'd capacity * @sdata: payload * @zc: whether zero-copy is used * * &p9_fcall represents the structure for all 9P RPC * transactions. Requests are packaged into fcalls, and reponses * must be extracted from them. * * See Also: http://plan9.bell-labs.com/magic/man2html/2/fcall */ struct p9_fcall { u32 size; u8 id; u16 tag; size_t offset; size_t capacity; struct kmem_cache *cache; u8 *sdata; bool zc; }; int p9_errstr2errno(char *errstr, int len); int p9_error_init(void); #endif /* NET_9P_H */ |