io_uring/opdef.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * io_uring opcode handling table
   4  */
   5 #include <linux/kernel.h>
   6 #include <linux/errno.h>
   7 #include <linux/fs.h>
   8 #include <linux/file.h>
   9 #include <linux/io_uring.h>
  10
  11 #include "io_uring.h"
  12 #include "opdef.h"
  13 #include "refs.h"
  14 #include "tctx.h"
  15 #include "sqpoll.h"
  16 #include "fdinfo.h"
  17 #include "kbuf.h"
  18 #include "rsrc.h"
  19
  20 #include "xattr.h"
  21 #include "nop.h"
  22 #include "fs.h"
  23 #include "splice.h"
  24 #include "sync.h"
  25 #include "advise.h"
  26 #include "openclose.h"
  27 #include "uring_cmd.h"
  28 #include "epoll.h"
  29 #include "statx.h"
  30 #include "net.h"
  31 #include "msg_ring.h"
  32 #include "timeout.h"
  33 #include "poll.h"
  34 #include "cancel.h"
  35 #include "rw.h"
  36
  37 static int io_no_issue(struct io_kiocb *req, unsigned int issue_flags)
  38 {
  39         WARN_ON_ONCE(1);
  40         return -ECANCELED;
  41 }
  42
  43 static __maybe_unused int io_eopnotsupp_prep(struct io_kiocb *kiocb,
  44                                              const struct io_uring_sqe *sqe)
  45 {
  46         return -EOPNOTSUPP;
  47 }
  48
  49 const struct io_op_def io_op_defs[] = {
  50         [IORING_OP_NOP] = {
  51                 .audit_skip             = 1,
  52                 .iopoll                 = 1,
  53                 .name                   = "NOP",
  54                 .prep                   = io_nop_prep,
  55                 .issue                  = io_nop,
  56         },
  57         [IORING_OP_READV] = {
  58                 .needs_file             = 1,
  59                 .unbound_nonreg_file    = 1,
  60                 .pollin                 = 1,
  61                 .buffer_select          = 1,
  62                 .plug                   = 1,
  63                 .audit_skip             = 1,
  64                 .ioprio                 = 1,
  65                 .iopoll                 = 1,
  66                 .async_size             = sizeof(struct io_async_rw),
  67                 .name                   = "READV",
  68                 .prep                   = io_prep_rw,
  69                 .issue                  = io_read,
  70                 .prep_async             = io_readv_prep_async,
  71                 .cleanup                = io_readv_writev_cleanup,
  72         },
  73         [IORING_OP_WRITEV] = {
  74                 .needs_file             = 1,
  75                 .hash_reg_file          = 1,
  76                 .unbound_nonreg_file    = 1,
  77                 .pollout                = 1,
  78                 .plug                   = 1,
  79                 .audit_skip             = 1,
  80                 .ioprio                 = 1,
  81                 .iopoll                 = 1,
  82                 .async_size             = sizeof(struct io_async_rw),
  83                 .name                   = "WRITEV",
  84                 .prep                   = io_prep_rw,
  85                 .issue                  = io_write,
  86                 .prep_async             = io_writev_prep_async,
  87                 .cleanup                = io_readv_writev_cleanup,
  88         },
  89         [IORING_OP_FSYNC] = {
  90                 .needs_file             = 1,
  91                 .audit_skip             = 1,
  92                 .name                   = "FSYNC",
  93                 .prep                   = io_fsync_prep,
  94                 .issue                  = io_fsync,
  95         },
  96         [IORING_OP_READ_FIXED] = {
  97                 .needs_file             = 1,
  98                 .unbound_nonreg_file    = 1,
  99                 .pollin                 = 1,
 100                 .plug                   = 1,
 101                 .audit_skip             = 1,
 102                 .ioprio                 = 1,
 103                 .iopoll                 = 1,
 104                 .async_size             = sizeof(struct io_async_rw),
 105                 .name                   = "READ_FIXED",
 106                 .prep                   = io_prep_rw,
 107                 .issue                  = io_read,
 108         },
 109         [IORING_OP_WRITE_FIXED] = {
 110                 .needs_file             = 1,
 111                 .hash_reg_file          = 1,
 112                 .unbound_nonreg_file    = 1,
 113                 .pollout                = 1,
 114                 .plug                   = 1,
 115                 .audit_skip             = 1,
 116                 .ioprio                 = 1,
 117                 .iopoll                 = 1,
 118                 .async_size             = sizeof(struct io_async_rw),
 119                 .name                   = "WRITE_FIXED",
 120                 .prep                   = io_prep_rw,
 121                 .issue                  = io_write,
 122         },
 123         [IORING_OP_POLL_ADD] = {
 124                 .needs_file             = 1,
 125                 .unbound_nonreg_file    = 1,
 126                 .audit_skip             = 1,
 127                 .name                   = "POLL_ADD",
 128                 .prep                   = io_poll_add_prep,
 129                 .issue                  = io_poll_add,
 130         },
 131         [IORING_OP_POLL_REMOVE] = {
 132                 .audit_skip             = 1,
 133                 .name                   = "POLL_REMOVE",
 134                 .prep                   = io_poll_remove_prep,
 135                 .issue                  = io_poll_remove,
 136         },
 137         [IORING_OP_SYNC_FILE_RANGE] = {
 138                 .needs_file             = 1,
 139                 .audit_skip             = 1,
 140                 .name                   = "SYNC_FILE_RANGE",
 141                 .prep                   = io_sfr_prep,
 142                 .issue                  = io_sync_file_range,
 143         },
 144         [IORING_OP_SENDMSG] = {
 145                 .needs_file             = 1,
 146                 .unbound_nonreg_file    = 1,
 147                 .pollout                = 1,
 148                 .ioprio                 = 1,
 149                 .name                   = "SENDMSG",
 150 #if defined(CONFIG_NET)
 151                 .async_size             = sizeof(struct io_async_msghdr),
 152                 .prep                   = io_sendmsg_prep,
 153                 .issue                  = io_sendmsg,
 154                 .prep_async             = io_sendmsg_prep_async,
 155                 .cleanup                = io_sendmsg_recvmsg_cleanup,
 156 #else
 157                 .prep                   = io_eopnotsupp_prep,
 158 #endif
 159         },
 160         [IORING_OP_RECVMSG] = {
 161                 .needs_file             = 1,
 162                 .unbound_nonreg_file    = 1,
 163                 .pollin                 = 1,
 164                 .buffer_select          = 1,
 165                 .ioprio                 = 1,
 166                 .name                   = "RECVMSG",
 167 #if defined(CONFIG_NET)
 168                 .async_size             = sizeof(struct io_async_msghdr),
 169                 .prep                   = io_recvmsg_prep,
 170                 .issue                  = io_recvmsg,
 171                 .prep_async             = io_recvmsg_prep_async,
 172                 .cleanup                = io_sendmsg_recvmsg_cleanup,
 173 #else
 174                 .prep                   = io_eopnotsupp_prep,
 175 #endif
 176         },
 177         [IORING_OP_TIMEOUT] = {
 178                 .audit_skip             = 1,
 179                 .async_size             = sizeof(struct io_timeout_data),
 180                 .name                   = "TIMEOUT",
 181                 .prep                   = io_timeout_prep,
 182                 .issue                  = io_timeout,
 183         },
 184         [IORING_OP_TIMEOUT_REMOVE] = {
 185                 /* used by timeout updates' prep() */
 186                 .audit_skip             = 1,
 187                 .name                   = "TIMEOUT_REMOVE",
 188                 .prep                   = io_timeout_remove_prep,
 189                 .issue                  = io_timeout_remove,
 190         },
 191         [IORING_OP_ACCEPT] = {
 192                 .needs_file             = 1,
 193                 .unbound_nonreg_file    = 1,
 194                 .pollin                 = 1,
 195                 .poll_exclusive         = 1,
 196                 .ioprio                 = 1,    /* used for flags */
 197                 .name                   = "ACCEPT",
 198 #if defined(CONFIG_NET)
 199                 .prep                   = io_accept_prep,
 200                 .issue                  = io_accept,
 201 #else
 202                 .prep                   = io_eopnotsupp_prep,
 203 #endif
 204         },
 205         [IORING_OP_ASYNC_CANCEL] = {
 206                 .audit_skip             = 1,
 207                 .name                   = "ASYNC_CANCEL",
 208                 .prep                   = io_async_cancel_prep,
 209                 .issue                  = io_async_cancel,
 210         },
 211         [IORING_OP_LINK_TIMEOUT] = {
 212                 .audit_skip             = 1,
 213                 .async_size             = sizeof(struct io_timeout_data),
 214                 .name                   = "LINK_TIMEOUT",
 215                 .prep                   = io_link_timeout_prep,
 216                 .issue                  = io_no_issue,
 217         },
 218         [IORING_OP_CONNECT] = {
 219                 .needs_file             = 1,
 220                 .unbound_nonreg_file    = 1,
 221                 .pollout                = 1,
 222                 .name                   = "CONNECT",
 223 #if defined(CONFIG_NET)
 224                 .async_size             = sizeof(struct io_async_connect),
 225                 .prep                   = io_connect_prep,
 226                 .issue                  = io_connect,
 227                 .prep_async             = io_connect_prep_async,
 228 #else
 229                 .prep                   = io_eopnotsupp_prep,
 230 #endif
 231         },
 232         [IORING_OP_FALLOCATE] = {
 233                 .needs_file             = 1,
 234                 .name                   = "FALLOCATE",
 235                 .prep                   = io_fallocate_prep,
 236                 .issue                  = io_fallocate,
 237         },
 238         [IORING_OP_OPENAT] = {
 239                 .name                   = "OPENAT",
 240                 .prep                   = io_openat_prep,
 241                 .issue                  = io_openat,
 242                 .cleanup                = io_open_cleanup,
 243         },
 244         [IORING_OP_CLOSE] = {
 245                 .name                   = "CLOSE",
 246                 .prep                   = io_close_prep,
 247                 .issue                  = io_close,
 248         },
 249         [IORING_OP_FILES_UPDATE] = {
 250                 .audit_skip             = 1,
 251                 .iopoll                 = 1,
 252                 .name                   = "FILES_UPDATE",
 253                 .prep                   = io_files_update_prep,
 254                 .issue                  = io_files_update,
 255         },
 256         [IORING_OP_STATX] = {
 257                 .audit_skip             = 1,
 258                 .name                   = "STATX",
 259                 .prep                   = io_statx_prep,
 260                 .issue                  = io_statx,
 261                 .cleanup                = io_statx_cleanup,
 262         },
 263         [IORING_OP_READ] = {
 264                 .needs_file             = 1,
 265                 .unbound_nonreg_file    = 1,
 266                 .pollin                 = 1,
 267                 .buffer_select          = 1,
 268                 .plug                   = 1,
 269                 .audit_skip             = 1,
 270                 .ioprio                 = 1,
 271                 .iopoll                 = 1,
 272                 .async_size             = sizeof(struct io_async_rw),
 273                 .name                   = "READ",
 274                 .prep                   = io_prep_rw,
 275                 .issue                  = io_read,
 276         },
 277         [IORING_OP_WRITE] = {
 278                 .needs_file             = 1,
 279                 .hash_reg_file          = 1,
 280                 .unbound_nonreg_file    = 1,
 281                 .pollout                = 1,
 282                 .plug                   = 1,
 283                 .audit_skip             = 1,
 284                 .ioprio                 = 1,
 285                 .iopoll                 = 1,
 286                 .async_size             = sizeof(struct io_async_rw),
 287                 .name                   = "WRITE",
 288                 .prep                   = io_prep_rw,
 289                 .issue                  = io_write,
 290         },
 291         [IORING_OP_FADVISE] = {
 292                 .needs_file             = 1,
 293                 .audit_skip             = 1,
 294                 .name                   = "FADVISE",
 295                 .prep                   = io_fadvise_prep,
 296                 .issue                  = io_fadvise,
 297         },
 298         [IORING_OP_MADVISE] = {
 299                 .name                   = "MADVISE",
 300                 .prep                   = io_madvise_prep,
 301                 .issue                  = io_madvise,
 302         },
 303         [IORING_OP_SEND] = {
 304                 .needs_file             = 1,
 305                 .unbound_nonreg_file    = 1,
 306                 .pollout                = 1,
 307                 .audit_skip             = 1,
 308                 .ioprio                 = 1,
 309                 .name                   = "SEND",
 310 #if defined(CONFIG_NET)
 311                 .prep                   = io_sendmsg_prep,
 312                 .issue                  = io_send,
 313 #else
 314                 .prep                   = io_eopnotsupp_prep,
 315 #endif
 316         },
 317         [IORING_OP_RECV] = {
 318                 .needs_file             = 1,
 319                 .unbound_nonreg_file    = 1,
 320                 .pollin                 = 1,
 321                 .buffer_select          = 1,
 322                 .audit_skip             = 1,
 323                 .ioprio                 = 1,
 324                 .name                   = "RECV",
 325 #if defined(CONFIG_NET)
 326                 .prep                   = io_recvmsg_prep,
 327                 .issue                  = io_recv,
 328 #else
 329                 .prep                   = io_eopnotsupp_prep,
 330 #endif
 331         },
 332         [IORING_OP_OPENAT2] = {
 333                 .name                   = "OPENAT2",
 334                 .prep                   = io_openat2_prep,
 335                 .issue                  = io_openat2,
 336                 .cleanup                = io_open_cleanup,
 337         },
 338         [IORING_OP_EPOLL_CTL] = {
 339                 .unbound_nonreg_file    = 1,
 340                 .audit_skip             = 1,
 341                 .name                   = "EPOLL",
 342 #if defined(CONFIG_EPOLL)
 343                 .prep                   = io_epoll_ctl_prep,
 344                 .issue                  = io_epoll_ctl,
 345 #else
 346                 .prep                   = io_eopnotsupp_prep,
 347 #endif
 348         },
 349         [IORING_OP_SPLICE] = {
 350                 .needs_file             = 1,
 351                 .hash_reg_file          = 1,
 352                 .unbound_nonreg_file    = 1,
 353                 .audit_skip             = 1,
 354                 .name                   = "SPLICE",
 355                 .prep                   = io_splice_prep,
 356                 .issue                  = io_splice,
 357         },
 358         [IORING_OP_PROVIDE_BUFFERS] = {
 359                 .audit_skip             = 1,
 360                 .iopoll                 = 1,
 361                 .name                   = "PROVIDE_BUFFERS",
 362                 .prep                   = io_provide_buffers_prep,
 363                 .issue                  = io_provide_buffers,
 364         },
 365         [IORING_OP_REMOVE_BUFFERS] = {
 366                 .audit_skip             = 1,
 367                 .iopoll                 = 1,
 368                 .name                   = "REMOVE_BUFFERS",
 369                 .prep                   = io_remove_buffers_prep,
 370                 .issue                  = io_remove_buffers,
 371         },
 372         [IORING_OP_TEE] = {
 373                 .needs_file             = 1,
 374                 .hash_reg_file          = 1,
 375                 .unbound_nonreg_file    = 1,
 376                 .audit_skip             = 1,
 377                 .name                   = "TEE",
 378                 .prep                   = io_tee_prep,
 379                 .issue                  = io_tee,
 380         },
 381         [IORING_OP_SHUTDOWN] = {
 382                 .needs_file             = 1,
 383                 .name                   = "SHUTDOWN",
 384 #if defined(CONFIG_NET)
 385                 .prep                   = io_shutdown_prep,
 386                 .issue                  = io_shutdown,
 387 #else
 388                 .prep                   = io_eopnotsupp_prep,
 389 #endif
 390         },
 391         [IORING_OP_RENAMEAT] = {
 392                 .name                   = "RENAMEAT",
 393                 .prep                   = io_renameat_prep,
 394                 .issue                  = io_renameat,
 395                 .cleanup                = io_renameat_cleanup,
 396         },
 397         [IORING_OP_UNLINKAT] = {
 398                 .name                   = "UNLINKAT",
 399                 .prep                   = io_unlinkat_prep,
 400                 .issue                  = io_unlinkat,
 401                 .cleanup                = io_unlinkat_cleanup,
 402         },
 403         [IORING_OP_MKDIRAT] = {
 404                 .name                   = "MKDIRAT",
 405                 .prep                   = io_mkdirat_prep,
 406                 .issue                  = io_mkdirat,
 407                 .cleanup                = io_mkdirat_cleanup,
 408         },
 409         [IORING_OP_SYMLINKAT] = {
 410                 .name                   = "SYMLINKAT",
 411                 .prep                   = io_symlinkat_prep,
 412                 .issue                  = io_symlinkat,
 413                 .cleanup                = io_link_cleanup,
 414         },
 415         [IORING_OP_LINKAT] = {
 416                 .name                   = "LINKAT",
 417                 .prep                   = io_linkat_prep,
 418                 .issue                  = io_linkat,
 419                 .cleanup                = io_link_cleanup,
 420         },
 421         [IORING_OP_MSG_RING] = {
 422                 .needs_file             = 1,
 423                 .iopoll                 = 1,
 424                 .name                   = "MSG_RING",
 425                 .prep                   = io_msg_ring_prep,
 426                 .issue                  = io_msg_ring,
 427         },
 428         [IORING_OP_FSETXATTR] = {
 429                 .needs_file = 1,
 430                 .name                   = "FSETXATTR",
 431                 .prep                   = io_fsetxattr_prep,
 432                 .issue                  = io_fsetxattr,
 433                 .cleanup                = io_xattr_cleanup,
 434         },
 435         [IORING_OP_SETXATTR] = {
 436                 .name                   = "SETXATTR",
 437                 .prep                   = io_setxattr_prep,
 438                 .issue                  = io_setxattr,
 439                 .cleanup                = io_xattr_cleanup,
 440         },
 441         [IORING_OP_FGETXATTR] = {
 442                 .needs_file = 1,
 443                 .name                   = "FGETXATTR",
 444                 .prep                   = io_fgetxattr_prep,
 445                 .issue                  = io_fgetxattr,
 446                 .cleanup                = io_xattr_cleanup,
 447         },
 448         [IORING_OP_GETXATTR] = {
 449                 .name                   = "GETXATTR",
 450                 .prep                   = io_getxattr_prep,
 451                 .issue                  = io_getxattr,
 452                 .cleanup                = io_xattr_cleanup,
 453         },
 454         [IORING_OP_SOCKET] = {
 455                 .audit_skip             = 1,
 456                 .name                   = "SOCKET",
 457 #if defined(CONFIG_NET)
 458                 .prep                   = io_socket_prep,
 459                 .issue                  = io_socket,
 460 #else
 461                 .prep                   = io_eopnotsupp_prep,
 462 #endif
 463         },
 464         [IORING_OP_URING_CMD] = {
 465                 .needs_file             = 1,
 466                 .plug                   = 1,
 467                 .name                   = "URING_CMD",
 468                 .async_size             = uring_cmd_pdu_size(1),
 469                 .prep                   = io_uring_cmd_prep,
 470                 .issue                  = io_uring_cmd,
 471                 .prep_async             = io_uring_cmd_prep_async,
 472         },
 473         [IORING_OP_SEND_ZC] = {
 474                 .name                   = "SENDZC_NOTIF",
 475                 .needs_file             = 1,
 476                 .unbound_nonreg_file    = 1,
 477                 .pollout                = 1,
 478                 .audit_skip             = 1,
 479                 .ioprio                 = 1,
 480                 .manual_alloc           = 1,
 481 #if defined(CONFIG_NET)
 482                 .async_size             = sizeof(struct io_async_msghdr),
 483                 .prep                   = io_sendzc_prep,
 484                 .issue                  = io_sendzc,
 485                 .prep_async             = io_sendzc_prep_async,
 486                 .cleanup                = io_sendzc_cleanup,
 487 #else
 488                 .prep                   = io_eopnotsupp_prep,
 489 #endif
 490         },
 491 };
 492
 493 const char *io_uring_get_opcode(u8 opcode)
 494 {
 495         if (opcode < IORING_OP_LAST)
 496                 return io_op_defs[opcode].name;
 497         return "INVALID";
 498 }
 499
 500 void __init io_uring_optable_init(void)
 501 {
 502         int i;
 503
 504         BUILD_BUG_ON(ARRAY_SIZE(io_op_defs) != IORING_OP_LAST);
 505
 506         for (i = 0; i < ARRAY_SIZE(io_op_defs); i++) {
 507                 BUG_ON(!io_op_defs[i].prep);
 508                 if (io_op_defs[i].prep != io_eopnotsupp_prep)
 509                         BUG_ON(!io_op_defs[i].issue);
 510                 WARN_ON_ONCE(!io_op_defs[i].name);
 511         }
 512 }