Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 2 | /* |
| 3 | * linux/fs/lockd/clnt4xdr.c |
| 4 | * |
| 5 | * XDR functions to encode/decode NLM version 4 RPC arguments and results. |
| 6 | * |
| 7 | * NLM client-side only. |
| 8 | * |
| 9 | * Copyright (C) 2010, Oracle. All rights reserved. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/sunrpc/xdr.h> |
| 14 | #include <linux/sunrpc/clnt.h> |
| 15 | #include <linux/sunrpc/stats.h> |
| 16 | #include <linux/lockd/lockd.h> |
| 17 | |
Christoph Hellwig | 9c69de4 | 2014-05-06 19:37:13 +0200 | [diff] [blame] | 18 | #include <uapi/linux/nfs3.h> |
| 19 | |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 20 | #define NLMDBG_FACILITY NLMDBG_XDR |
| 21 | |
| 22 | #if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ) |
| 23 | # error "NLM host name cannot be larger than XDR_MAX_NETOBJ!" |
| 24 | #endif |
| 25 | |
| 26 | #if (NLMCLNT_OHSIZE > NLM_MAXSTRLEN) |
| 27 | # error "NLM host name cannot be larger than NLM's maximum string length!" |
| 28 | #endif |
| 29 | |
| 30 | /* |
| 31 | * Declare the space requirements for NLM arguments and replies as |
| 32 | * number of 32bit-words |
| 33 | */ |
| 34 | #define NLM4_void_sz (0) |
| 35 | #define NLM4_cookie_sz (1+(NLM_MAXCOOKIELEN>>2)) |
| 36 | #define NLM4_caller_sz (1+(NLMCLNT_OHSIZE>>2)) |
| 37 | #define NLM4_owner_sz (1+(NLMCLNT_OHSIZE>>2)) |
| 38 | #define NLM4_fhandle_sz (1+(NFS3_FHSIZE>>2)) |
| 39 | #define NLM4_lock_sz (5+NLM4_caller_sz+NLM4_owner_sz+NLM4_fhandle_sz) |
| 40 | #define NLM4_holder_sz (6+NLM4_owner_sz) |
| 41 | |
| 42 | #define NLM4_testargs_sz (NLM4_cookie_sz+1+NLM4_lock_sz) |
| 43 | #define NLM4_lockargs_sz (NLM4_cookie_sz+4+NLM4_lock_sz) |
| 44 | #define NLM4_cancargs_sz (NLM4_cookie_sz+2+NLM4_lock_sz) |
| 45 | #define NLM4_unlockargs_sz (NLM4_cookie_sz+NLM4_lock_sz) |
| 46 | |
| 47 | #define NLM4_testres_sz (NLM4_cookie_sz+1+NLM4_holder_sz) |
| 48 | #define NLM4_res_sz (NLM4_cookie_sz+1) |
| 49 | #define NLM4_norep_sz (0) |
| 50 | |
| 51 | |
| 52 | static s64 loff_t_to_s64(loff_t offset) |
| 53 | { |
| 54 | s64 res; |
| 55 | |
| 56 | if (offset >= NLM4_OFFSET_MAX) |
| 57 | res = NLM4_OFFSET_MAX; |
| 58 | else if (offset <= -NLM4_OFFSET_MAX) |
| 59 | res = -NLM4_OFFSET_MAX; |
| 60 | else |
| 61 | res = offset; |
| 62 | return res; |
| 63 | } |
| 64 | |
| 65 | static void nlm4_compute_offsets(const struct nlm_lock *lock, |
| 66 | u64 *l_offset, u64 *l_len) |
| 67 | { |
| 68 | const struct file_lock *fl = &lock->fl; |
| 69 | |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 70 | *l_offset = loff_t_to_s64(fl->fl_start); |
| 71 | if (fl->fl_end == OFFSET_MAX) |
| 72 | *l_len = 0; |
| 73 | else |
| 74 | *l_len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1); |
| 75 | } |
| 76 | |
| 77 | /* |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 78 | * Encode/decode NLMv4 basic data types |
| 79 | * |
| 80 | * Basic NLMv4 data types are defined in Appendix II, section 6.1.4 |
| 81 | * of RFC 1813: "NFS Version 3 Protocol Specification" and in Chapter |
| 82 | * 10 of X/Open's "Protocols for Interworking: XNFS, Version 3W". |
| 83 | * |
| 84 | * Not all basic data types have their own encoding and decoding |
| 85 | * functions. For run-time efficiency, some data types are encoded |
| 86 | * or decoded inline. |
| 87 | */ |
| 88 | |
| 89 | static void encode_bool(struct xdr_stream *xdr, const int value) |
| 90 | { |
| 91 | __be32 *p; |
| 92 | |
| 93 | p = xdr_reserve_space(xdr, 4); |
| 94 | *p = value ? xdr_one : xdr_zero; |
| 95 | } |
| 96 | |
| 97 | static void encode_int32(struct xdr_stream *xdr, const s32 value) |
| 98 | { |
| 99 | __be32 *p; |
| 100 | |
| 101 | p = xdr_reserve_space(xdr, 4); |
| 102 | *p = cpu_to_be32(value); |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * typedef opaque netobj<MAXNETOBJ_SZ> |
| 107 | */ |
| 108 | static void encode_netobj(struct xdr_stream *xdr, |
| 109 | const u8 *data, const unsigned int length) |
| 110 | { |
| 111 | __be32 *p; |
| 112 | |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 113 | p = xdr_reserve_space(xdr, 4 + length); |
| 114 | xdr_encode_opaque(p, data, length); |
| 115 | } |
| 116 | |
| 117 | static int decode_netobj(struct xdr_stream *xdr, |
| 118 | struct xdr_netobj *obj) |
| 119 | { |
J. Bruce Fields | b8db159 | 2018-11-26 11:36:52 -0500 | [diff] [blame] | 120 | ssize_t ret; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 121 | |
J. Bruce Fields | b8db159 | 2018-11-26 11:36:52 -0500 | [diff] [blame] | 122 | ret = xdr_stream_decode_opaque_inline(xdr, (void *)&obj->data, |
| 123 | XDR_MAX_NETOBJ); |
| 124 | if (unlikely(ret < 0)) |
| 125 | return -EIO; |
| 126 | obj->len = ret; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 127 | return 0; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | /* |
| 131 | * netobj cookie; |
| 132 | */ |
| 133 | static void encode_cookie(struct xdr_stream *xdr, |
| 134 | const struct nlm_cookie *cookie) |
| 135 | { |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 136 | encode_netobj(xdr, (u8 *)&cookie->data, cookie->len); |
| 137 | } |
| 138 | |
| 139 | static int decode_cookie(struct xdr_stream *xdr, |
| 140 | struct nlm_cookie *cookie) |
| 141 | { |
| 142 | u32 length; |
| 143 | __be32 *p; |
| 144 | |
| 145 | p = xdr_inline_decode(xdr, 4); |
| 146 | if (unlikely(p == NULL)) |
| 147 | goto out_overflow; |
| 148 | length = be32_to_cpup(p++); |
| 149 | /* apparently HPUX can return empty cookies */ |
| 150 | if (length == 0) |
| 151 | goto out_hpux; |
| 152 | if (length > NLM_MAXCOOKIELEN) |
| 153 | goto out_size; |
| 154 | p = xdr_inline_decode(xdr, length); |
| 155 | if (unlikely(p == NULL)) |
| 156 | goto out_overflow; |
| 157 | cookie->len = length; |
| 158 | memcpy(cookie->data, p, length); |
| 159 | return 0; |
| 160 | out_hpux: |
| 161 | cookie->len = 4; |
| 162 | memset(cookie->data, 0, 4); |
| 163 | return 0; |
| 164 | out_size: |
| 165 | dprintk("NFS: returned cookie was too long: %u\n", length); |
| 166 | return -EIO; |
| 167 | out_overflow: |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 168 | return -EIO; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * netobj fh; |
| 173 | */ |
| 174 | static void encode_fh(struct xdr_stream *xdr, const struct nfs_fh *fh) |
| 175 | { |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 176 | encode_netobj(xdr, (u8 *)&fh->data, fh->size); |
| 177 | } |
| 178 | |
| 179 | /* |
| 180 | * enum nlm4_stats { |
| 181 | * NLM4_GRANTED = 0, |
| 182 | * NLM4_DENIED = 1, |
| 183 | * NLM4_DENIED_NOLOCKS = 2, |
| 184 | * NLM4_BLOCKED = 3, |
| 185 | * NLM4_DENIED_GRACE_PERIOD = 4, |
| 186 | * NLM4_DEADLCK = 5, |
| 187 | * NLM4_ROFS = 6, |
| 188 | * NLM4_STALE_FH = 7, |
| 189 | * NLM4_FBIG = 8, |
| 190 | * NLM4_FAILED = 9 |
| 191 | * }; |
| 192 | * |
| 193 | * struct nlm4_stat { |
| 194 | * nlm4_stats stat; |
| 195 | * }; |
| 196 | * |
| 197 | * NB: we don't swap bytes for the NLM status values. The upper |
| 198 | * layers deal directly with the status value in network byte |
| 199 | * order. |
| 200 | */ |
| 201 | static void encode_nlm4_stat(struct xdr_stream *xdr, |
| 202 | const __be32 stat) |
| 203 | { |
| 204 | __be32 *p; |
| 205 | |
| 206 | BUG_ON(be32_to_cpu(stat) > NLM_FAILED); |
| 207 | p = xdr_reserve_space(xdr, 4); |
| 208 | *p = stat; |
| 209 | } |
| 210 | |
| 211 | static int decode_nlm4_stat(struct xdr_stream *xdr, __be32 *stat) |
| 212 | { |
| 213 | __be32 *p; |
| 214 | |
| 215 | p = xdr_inline_decode(xdr, 4); |
| 216 | if (unlikely(p == NULL)) |
| 217 | goto out_overflow; |
Al Viro | e847469 | 2012-04-13 13:49:47 -0400 | [diff] [blame] | 218 | if (unlikely(ntohl(*p) > ntohl(nlm4_failed))) |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 219 | goto out_bad_xdr; |
| 220 | *stat = *p; |
| 221 | return 0; |
| 222 | out_bad_xdr: |
| 223 | dprintk("%s: server returned invalid nlm4_stats value: %u\n", |
| 224 | __func__, be32_to_cpup(p)); |
| 225 | return -EIO; |
| 226 | out_overflow: |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 227 | return -EIO; |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * struct nlm4_holder { |
| 232 | * bool exclusive; |
| 233 | * int32 svid; |
| 234 | * netobj oh; |
| 235 | * uint64 l_offset; |
| 236 | * uint64 l_len; |
| 237 | * }; |
| 238 | */ |
| 239 | static void encode_nlm4_holder(struct xdr_stream *xdr, |
| 240 | const struct nlm_res *result) |
| 241 | { |
| 242 | const struct nlm_lock *lock = &result->lock; |
| 243 | u64 l_offset, l_len; |
| 244 | __be32 *p; |
| 245 | |
Jeff Layton | eb8ed7c | 2024-01-31 18:02:21 -0500 | [diff] [blame] | 246 | encode_bool(xdr, lock->fl.c.flc_type == F_RDLCK); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 247 | encode_int32(xdr, lock->svid); |
| 248 | encode_netobj(xdr, lock->oh.data, lock->oh.len); |
| 249 | |
| 250 | p = xdr_reserve_space(xdr, 4 + 4); |
| 251 | nlm4_compute_offsets(lock, &l_offset, &l_len); |
| 252 | p = xdr_encode_hyper(p, l_offset); |
| 253 | xdr_encode_hyper(p, l_len); |
| 254 | } |
| 255 | |
| 256 | static int decode_nlm4_holder(struct xdr_stream *xdr, struct nlm_res *result) |
| 257 | { |
| 258 | struct nlm_lock *lock = &result->lock; |
| 259 | struct file_lock *fl = &lock->fl; |
| 260 | u64 l_offset, l_len; |
| 261 | u32 exclusive; |
| 262 | int error; |
| 263 | __be32 *p; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 264 | |
| 265 | memset(lock, 0, sizeof(*lock)); |
| 266 | locks_init_lock(fl); |
| 267 | |
| 268 | p = xdr_inline_decode(xdr, 4 + 4); |
| 269 | if (unlikely(p == NULL)) |
| 270 | goto out_overflow; |
| 271 | exclusive = be32_to_cpup(p++); |
| 272 | lock->svid = be32_to_cpup(p); |
Jeff Layton | eb8ed7c | 2024-01-31 18:02:21 -0500 | [diff] [blame] | 273 | fl->c.flc_pid = (pid_t)lock->svid; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 274 | |
| 275 | error = decode_netobj(xdr, &lock->oh); |
| 276 | if (unlikely(error)) |
| 277 | goto out; |
| 278 | |
| 279 | p = xdr_inline_decode(xdr, 8 + 8); |
| 280 | if (unlikely(p == NULL)) |
| 281 | goto out_overflow; |
| 282 | |
Jeff Layton | eb8ed7c | 2024-01-31 18:02:21 -0500 | [diff] [blame] | 283 | fl->c.flc_flags = FL_POSIX; |
| 284 | fl->c.flc_type = exclusive != 0 ? F_WRLCK : F_RDLCK; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 285 | p = xdr_decode_hyper(p, &l_offset); |
| 286 | xdr_decode_hyper(p, &l_len); |
Jeff Layton | 7ff8491 | 2023-03-14 06:20:58 -0400 | [diff] [blame] | 287 | nlm4svc_set_file_lock_range(fl, l_offset, l_len); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 288 | error = 0; |
| 289 | out: |
| 290 | return error; |
| 291 | out_overflow: |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 292 | return -EIO; |
| 293 | } |
| 294 | |
| 295 | /* |
| 296 | * string caller_name<LM_MAXSTRLEN>; |
| 297 | */ |
| 298 | static void encode_caller_name(struct xdr_stream *xdr, const char *name) |
| 299 | { |
| 300 | /* NB: client-side does not set lock->len */ |
| 301 | u32 length = strlen(name); |
| 302 | __be32 *p; |
| 303 | |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 304 | p = xdr_reserve_space(xdr, 4 + length); |
| 305 | xdr_encode_opaque(p, name, length); |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * struct nlm4_lock { |
| 310 | * string caller_name<LM_MAXSTRLEN>; |
| 311 | * netobj fh; |
| 312 | * netobj oh; |
| 313 | * int32 svid; |
| 314 | * uint64 l_offset; |
| 315 | * uint64 l_len; |
| 316 | * }; |
| 317 | */ |
| 318 | static void encode_nlm4_lock(struct xdr_stream *xdr, |
| 319 | const struct nlm_lock *lock) |
| 320 | { |
| 321 | u64 l_offset, l_len; |
| 322 | __be32 *p; |
| 323 | |
| 324 | encode_caller_name(xdr, lock->caller); |
| 325 | encode_fh(xdr, &lock->fh); |
| 326 | encode_netobj(xdr, lock->oh.data, lock->oh.len); |
| 327 | |
| 328 | p = xdr_reserve_space(xdr, 4 + 8 + 8); |
| 329 | *p++ = cpu_to_be32(lock->svid); |
| 330 | |
| 331 | nlm4_compute_offsets(lock, &l_offset, &l_len); |
| 332 | p = xdr_encode_hyper(p, l_offset); |
| 333 | xdr_encode_hyper(p, l_len); |
| 334 | } |
| 335 | |
| 336 | |
| 337 | /* |
| 338 | * NLMv4 XDR encode functions |
| 339 | * |
| 340 | * NLMv4 argument types are defined in Appendix II of RFC 1813: |
| 341 | * "NFS Version 3 Protocol Specification" and Chapter 10 of X/Open's |
| 342 | * "Protocols for Interworking: XNFS, Version 3W". |
| 343 | */ |
| 344 | |
| 345 | /* |
| 346 | * struct nlm4_testargs { |
| 347 | * netobj cookie; |
| 348 | * bool exclusive; |
| 349 | * struct nlm4_lock alock; |
| 350 | * }; |
| 351 | */ |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 352 | static void nlm4_xdr_enc_testargs(struct rpc_rqst *req, |
| 353 | struct xdr_stream *xdr, |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 354 | const void *data) |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 355 | { |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 356 | const struct nlm_args *args = data; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 357 | const struct nlm_lock *lock = &args->lock; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 358 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 359 | encode_cookie(xdr, &args->cookie); |
Jeff Layton | eb8ed7c | 2024-01-31 18:02:21 -0500 | [diff] [blame] | 360 | encode_bool(xdr, lock->fl.c.flc_type == F_WRLCK); |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 361 | encode_nlm4_lock(xdr, lock); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | /* |
| 365 | * struct nlm4_lockargs { |
| 366 | * netobj cookie; |
| 367 | * bool block; |
| 368 | * bool exclusive; |
| 369 | * struct nlm4_lock alock; |
| 370 | * bool reclaim; |
| 371 | * int state; |
| 372 | * }; |
| 373 | */ |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 374 | static void nlm4_xdr_enc_lockargs(struct rpc_rqst *req, |
| 375 | struct xdr_stream *xdr, |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 376 | const void *data) |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 377 | { |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 378 | const struct nlm_args *args = data; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 379 | const struct nlm_lock *lock = &args->lock; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 380 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 381 | encode_cookie(xdr, &args->cookie); |
| 382 | encode_bool(xdr, args->block); |
Jeff Layton | eb8ed7c | 2024-01-31 18:02:21 -0500 | [diff] [blame] | 383 | encode_bool(xdr, lock->fl.c.flc_type == F_WRLCK); |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 384 | encode_nlm4_lock(xdr, lock); |
| 385 | encode_bool(xdr, args->reclaim); |
| 386 | encode_int32(xdr, args->state); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | /* |
| 390 | * struct nlm4_cancargs { |
| 391 | * netobj cookie; |
| 392 | * bool block; |
| 393 | * bool exclusive; |
| 394 | * struct nlm4_lock alock; |
| 395 | * }; |
| 396 | */ |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 397 | static void nlm4_xdr_enc_cancargs(struct rpc_rqst *req, |
| 398 | struct xdr_stream *xdr, |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 399 | const void *data) |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 400 | { |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 401 | const struct nlm_args *args = data; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 402 | const struct nlm_lock *lock = &args->lock; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 403 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 404 | encode_cookie(xdr, &args->cookie); |
| 405 | encode_bool(xdr, args->block); |
Jeff Layton | eb8ed7c | 2024-01-31 18:02:21 -0500 | [diff] [blame] | 406 | encode_bool(xdr, lock->fl.c.flc_type == F_WRLCK); |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 407 | encode_nlm4_lock(xdr, lock); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | /* |
| 411 | * struct nlm4_unlockargs { |
| 412 | * netobj cookie; |
| 413 | * struct nlm4_lock alock; |
| 414 | * }; |
| 415 | */ |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 416 | static void nlm4_xdr_enc_unlockargs(struct rpc_rqst *req, |
| 417 | struct xdr_stream *xdr, |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 418 | const void *data) |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 419 | { |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 420 | const struct nlm_args *args = data; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 421 | const struct nlm_lock *lock = &args->lock; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 422 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 423 | encode_cookie(xdr, &args->cookie); |
| 424 | encode_nlm4_lock(xdr, lock); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 425 | } |
| 426 | |
| 427 | /* |
| 428 | * struct nlm4_res { |
| 429 | * netobj cookie; |
| 430 | * nlm4_stat stat; |
| 431 | * }; |
| 432 | */ |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 433 | static void nlm4_xdr_enc_res(struct rpc_rqst *req, |
| 434 | struct xdr_stream *xdr, |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 435 | const void *data) |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 436 | { |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 437 | const struct nlm_res *result = data; |
| 438 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 439 | encode_cookie(xdr, &result->cookie); |
| 440 | encode_nlm4_stat(xdr, result->status); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 441 | } |
| 442 | |
| 443 | /* |
| 444 | * union nlm4_testrply switch (nlm4_stats stat) { |
| 445 | * case NLM4_DENIED: |
| 446 | * struct nlm4_holder holder; |
| 447 | * default: |
| 448 | * void; |
| 449 | * }; |
| 450 | * |
| 451 | * struct nlm4_testres { |
| 452 | * netobj cookie; |
| 453 | * nlm4_testrply test_stat; |
| 454 | * }; |
| 455 | */ |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 456 | static void nlm4_xdr_enc_testres(struct rpc_rqst *req, |
| 457 | struct xdr_stream *xdr, |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 458 | const void *data) |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 459 | { |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 460 | const struct nlm_res *result = data; |
| 461 | |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 462 | encode_cookie(xdr, &result->cookie); |
| 463 | encode_nlm4_stat(xdr, result->status); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 464 | if (result->status == nlm_lck_denied) |
Chuck Lever | 9f06c71 | 2010-12-14 14:59:18 +0000 | [diff] [blame] | 465 | encode_nlm4_holder(xdr, result); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | |
| 469 | /* |
| 470 | * NLMv4 XDR decode functions |
| 471 | * |
| 472 | * NLMv4 argument types are defined in Appendix II of RFC 1813: |
| 473 | * "NFS Version 3 Protocol Specification" and Chapter 10 of X/Open's |
| 474 | * "Protocols for Interworking: XNFS, Version 3W". |
| 475 | */ |
| 476 | |
| 477 | /* |
| 478 | * union nlm4_testrply switch (nlm4_stats stat) { |
| 479 | * case NLM4_DENIED: |
| 480 | * struct nlm4_holder holder; |
| 481 | * default: |
| 482 | * void; |
| 483 | * }; |
| 484 | * |
| 485 | * struct nlm4_testres { |
| 486 | * netobj cookie; |
| 487 | * nlm4_testrply test_stat; |
| 488 | * }; |
| 489 | */ |
| 490 | static int decode_nlm4_testrply(struct xdr_stream *xdr, |
| 491 | struct nlm_res *result) |
| 492 | { |
| 493 | int error; |
| 494 | |
| 495 | error = decode_nlm4_stat(xdr, &result->status); |
| 496 | if (unlikely(error)) |
| 497 | goto out; |
| 498 | if (result->status == nlm_lck_denied) |
| 499 | error = decode_nlm4_holder(xdr, result); |
| 500 | out: |
| 501 | return error; |
| 502 | } |
| 503 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 504 | static int nlm4_xdr_dec_testres(struct rpc_rqst *req, |
| 505 | struct xdr_stream *xdr, |
Christoph Hellwig | 1fa2339 | 2017-05-08 15:06:20 +0200 | [diff] [blame] | 506 | void *data) |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 507 | { |
Christoph Hellwig | 1fa2339 | 2017-05-08 15:06:20 +0200 | [diff] [blame] | 508 | struct nlm_res *result = data; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 509 | int error; |
| 510 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 511 | error = decode_cookie(xdr, &result->cookie); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 512 | if (unlikely(error)) |
| 513 | goto out; |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 514 | error = decode_nlm4_testrply(xdr, result); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 515 | out: |
| 516 | return error; |
| 517 | } |
| 518 | |
| 519 | /* |
| 520 | * struct nlm4_res { |
| 521 | * netobj cookie; |
| 522 | * nlm4_stat stat; |
| 523 | * }; |
| 524 | */ |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 525 | static int nlm4_xdr_dec_res(struct rpc_rqst *req, |
| 526 | struct xdr_stream *xdr, |
Christoph Hellwig | 1fa2339 | 2017-05-08 15:06:20 +0200 | [diff] [blame] | 527 | void *data) |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 528 | { |
Christoph Hellwig | 1fa2339 | 2017-05-08 15:06:20 +0200 | [diff] [blame] | 529 | struct nlm_res *result = data; |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 530 | int error; |
| 531 | |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 532 | error = decode_cookie(xdr, &result->cookie); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 533 | if (unlikely(error)) |
| 534 | goto out; |
Chuck Lever | bf26955 | 2010-12-14 14:59:29 +0000 | [diff] [blame] | 535 | error = decode_nlm4_stat(xdr, &result->status); |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 536 | out: |
| 537 | return error; |
| 538 | } |
| 539 | |
| 540 | |
| 541 | /* |
| 542 | * For NLM, a void procedure really returns nothing |
| 543 | */ |
| 544 | #define nlm4_xdr_dec_norep NULL |
| 545 | |
| 546 | #define PROC(proc, argtype, restype) \ |
| 547 | [NLMPROC_##proc] = { \ |
| 548 | .p_proc = NLMPROC_##proc, \ |
Christoph Hellwig | bf96391 | 2017-05-08 09:34:04 +0200 | [diff] [blame] | 549 | .p_encode = nlm4_xdr_enc_##argtype, \ |
Christoph Hellwig | 1fa2339 | 2017-05-08 15:06:20 +0200 | [diff] [blame] | 550 | .p_decode = nlm4_xdr_dec_##restype, \ |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 551 | .p_arglen = NLM4_##argtype##_sz, \ |
| 552 | .p_replen = NLM4_##restype##_sz, \ |
| 553 | .p_statidx = NLMPROC_##proc, \ |
| 554 | .p_name = #proc, \ |
| 555 | } |
| 556 | |
Christoph Hellwig | 499b498 | 2017-05-12 15:36:49 +0200 | [diff] [blame] | 557 | static const struct rpc_procinfo nlm4_procedures[] = { |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 558 | PROC(TEST, testargs, testres), |
| 559 | PROC(LOCK, lockargs, res), |
| 560 | PROC(CANCEL, cancargs, res), |
| 561 | PROC(UNLOCK, unlockargs, res), |
| 562 | PROC(GRANTED, testargs, res), |
| 563 | PROC(TEST_MSG, testargs, norep), |
| 564 | PROC(LOCK_MSG, lockargs, norep), |
| 565 | PROC(CANCEL_MSG, cancargs, norep), |
| 566 | PROC(UNLOCK_MSG, unlockargs, norep), |
| 567 | PROC(GRANTED_MSG, testargs, norep), |
| 568 | PROC(TEST_RES, testres, norep), |
| 569 | PROC(LOCK_RES, res, norep), |
| 570 | PROC(CANCEL_RES, res, norep), |
| 571 | PROC(UNLOCK_RES, res, norep), |
| 572 | PROC(GRANTED_RES, res, norep), |
| 573 | }; |
| 574 | |
Christoph Hellwig | 1c5876d | 2017-05-08 23:27:10 +0200 | [diff] [blame] | 575 | static unsigned int nlm_version4_counts[ARRAY_SIZE(nlm4_procedures)]; |
Trond Myklebust | a613fa1 | 2012-01-20 13:53:56 -0500 | [diff] [blame] | 576 | const struct rpc_version nlm_version4 = { |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 577 | .number = 4, |
| 578 | .nrprocs = ARRAY_SIZE(nlm4_procedures), |
| 579 | .procs = nlm4_procedures, |
Christoph Hellwig | 1c5876d | 2017-05-08 23:27:10 +0200 | [diff] [blame] | 580 | .counts = nlm_version4_counts, |
Chuck Lever | 3460f29 | 2010-12-14 14:57:12 +0000 | [diff] [blame] | 581 | }; |