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                 .fail                   = io_rw_fail,
  73         },
  74         [IORING_OP_WRITEV] = {
  75                 .needs_file             = 1,
  76                 .hash_reg_file          = 1,
  77                 .unbound_nonreg_file    = 1,
  78                 .pollout                = 1,
  79                 .plug                   = 1,
  80                 .audit_skip             = 1,
  81                 .ioprio                 = 1,
  82                 .iopoll                 = 1,
  83                 .async_size             = sizeof(struct io_async_rw),
  84                 .name                   = "WRITEV",
  85                 .prep                   = io_prep_rw,
  86                 .issue                  = io_write,
  87                 .prep_async             = io_writev_prep_async,
  88                 .cleanup                = io_readv_writev_cleanup,
  89                 .fail                   = io_rw_fail,
  90         },
  91         [IORING_OP_FSYNC] = {
  92                 .needs_file             = 1,
  93                 .audit_skip             = 1,
  94                 .name                   = "FSYNC",
  95                 .prep                   = io_fsync_prep,
  96                 .issue                  = io_fsync,
  97         },
  98         [IORING_OP_READ_FIXED] = {
  99                 .needs_file             = 1,
 100                 .unbound_nonreg_file    = 1,
 101                 .pollin                 = 1,
 102                 .plug                   = 1,
 103                 .audit_skip             = 1,
 104                 .ioprio                 = 1,
 105                 .iopoll                 = 1,
 106                 .async_size             = sizeof(struct io_async_rw),
 107                 .name                   = "READ_FIXED",
 108                 .prep                   = io_prep_rw,
 109                 .issue                  = io_read,
 110                 .fail                   = io_rw_fail,
 111         },
 112         [IORING_OP_WRITE_FIXED] = {
 113                 .needs_file             = 1,
 114                 .hash_reg_file          = 1,
 115                 .unbound_nonreg_file    = 1,
 116                 .pollout                = 1,
 117                 .plug                   = 1,
 118                 .audit_skip             = 1,
 119                 .ioprio                 = 1,
 120                 .iopoll                 = 1,
 121                 .async_size             = sizeof(struct io_async_rw),
 122                 .name                   = "WRITE_FIXED",
 123                 .prep                   = io_prep_rw,
 124                 .issue                  = io_write,
 125                 .fail                   = io_rw_fail,
 126         },
 127         [IORING_OP_POLL_ADD] = {
 128                 .needs_file             = 1,
 129                 .unbound_nonreg_file    = 1,
 130                 .audit_skip             = 1,
 131                 .name                   = "POLL_ADD",
 132                 .prep                   = io_poll_add_prep,
 133                 .issue                  = io_poll_add,
 134         },
 135         [IORING_OP_POLL_REMOVE] = {
 136                 .audit_skip             = 1,
 137                 .name                   = "POLL_REMOVE",
 138                 .prep                   = io_poll_remove_prep,
 139                 .issue                  = io_poll_remove,
 140         },
 141         [IORING_OP_SYNC_FILE_RANGE] = {
 142                 .needs_file             = 1,
 143                 .audit_skip             = 1,
 144                 .name                   = "SYNC_FILE_RANGE",
 145                 .prep                   = io_sfr_prep,
 146                 .issue                  = io_sync_file_range,
 147         },
 148         [IORING_OP_SENDMSG] = {
 149                 .needs_file             = 1,
 150                 .unbound_nonreg_file    = 1,
 151                 .pollout                = 1,
 152                 .ioprio                 = 1,
 153                 .manual_alloc           = 1,
 154                 .name                   = "SENDMSG",
 155 #if defined(CONFIG_NET)
 156                 .async_size             = sizeof(struct io_async_msghdr),
 157                 .prep                   = io_sendmsg_prep,
 158                 .issue                  = io_sendmsg,
 159                 .prep_async             = io_sendmsg_prep_async,
 160                 .cleanup                = io_sendmsg_recvmsg_cleanup,
 161                 .fail                   = io_sendrecv_fail,
 162 #else
 163                 .prep                   = io_eopnotsupp_prep,
 164 #endif
 165         },
 166         [IORING_OP_RECVMSG] = {
 167                 .needs_file             = 1,
 168                 .unbound_nonreg_file    = 1,
 169                 .pollin                 = 1,
 170                 .buffer_select          = 1,
 171                 .ioprio                 = 1,
 172                 .manual_alloc           = 1,
 173                 .name                   = "RECVMSG",
 174 #if defined(CONFIG_NET)
 175                 .async_size             = sizeof(struct io_async_msghdr),
 176                 .prep                   = io_recvmsg_prep,
 177                 .issue                  = io_recvmsg,
 178                 .prep_async             = io_recvmsg_prep_async,
 179                 .cleanup                = io_sendmsg_recvmsg_cleanup,
 180                 .fail                   = io_sendrecv_fail,
 181 #else
 182                 .prep                   = io_eopnotsupp_prep,
 183 #endif
 184         },
 185         [IORING_OP_TIMEOUT] = {
 186                 .audit_skip             = 1,
 187                 .async_size             = sizeof(struct io_timeout_data),
 188                 .name                   = "TIMEOUT",
 189                 .prep                   = io_timeout_prep,
 190                 .issue                  = io_timeout,
 191         },
 192         [IORING_OP_TIMEOUT_REMOVE] = {
 193                 /* used by timeout updates' prep() */
 194                 .audit_skip             = 1,
 195                 .name                   = "TIMEOUT_REMOVE",
 196                 .prep                   = io_timeout_remove_prep,
 197                 .issue                  = io_timeout_remove,
 198         },
 199         [IORING_OP_ACCEPT] = {
 200                 .needs_file             = 1,
 201                 .unbound_nonreg_file    = 1,
 202                 .pollin                 = 1,
 203                 .poll_exclusive         = 1,
 204                 .ioprio                 = 1,    /* used for flags */
 205                 .name                   = "ACCEPT",
 206 #if defined(CONFIG_NET)
 207                 .prep                   = io_accept_prep,
 208                 .issue                  = io_accept,
 209 #else
 210                 .prep                   = io_eopnotsupp_prep,
 211 #endif
 212         },
 213         [IORING_OP_ASYNC_CANCEL] = {
 214                 .audit_skip             = 1,
 215                 .name                   = "ASYNC_CANCEL",
 216                 .prep                   = io_async_cancel_prep,
 217                 .issue                  = io_async_cancel,
 218         },
 219         [IORING_OP_LINK_TIMEOUT] = {
 220                 .audit_skip             = 1,
 221                 .async_size             = sizeof(struct io_timeout_data),
 222                 .name                   = "LINK_TIMEOUT",
 223                 .prep                   = io_link_timeout_prep,
 224                 .issue                  = io_no_issue,
 225         },
 226         [IORING_OP_CONNECT] = {
 227                 .needs_file             = 1,
 228                 .unbound_nonreg_file    = 1,
 229                 .pollout                = 1,
 230                 .name                   = "CONNECT",
 231 #if defined(CONFIG_NET)
 232                 .async_size             = sizeof(struct io_async_connect),
 233                 .prep                   = io_connect_prep,
 234                 .issue                  = io_connect,
 235                 .prep_async             = io_connect_prep_async,
 236 #else
 237                 .prep                   = io_eopnotsupp_prep,
 238 #endif
 239         },
 240         [IORING_OP_FALLOCATE] = {
 241                 .needs_file             = 1,
 242                 .name                   = "FALLOCATE",
 243                 .prep                   = io_fallocate_prep,
 244                 .issue                  = io_fallocate,
 245         },
 246         [IORING_OP_OPENAT] = {
 247                 .name                   = "OPENAT",
 248                 .prep                   = io_openat_prep,
 249                 .issue                  = io_openat,
 250                 .cleanup                = io_open_cleanup,
 251         },
 252         [IORING_OP_CLOSE] = {
 253                 .name                   = "CLOSE",
 254                 .prep                   = io_close_prep,
 255                 .issue                  = io_close,
 256         },
 257         [IORING_OP_FILES_UPDATE] = {
 258                 .audit_skip             = 1,
 259                 .iopoll                 = 1,
 260                 .name                   = "FILES_UPDATE",
 261                 .prep                   = io_files_update_prep,
 262                 .issue                  = io_files_update,
 263         },
 264         [IORING_OP_STATX] = {
 265                 .audit_skip             = 1,
 266                 .name                   = "STATX",
 267                 .prep                   = io_statx_prep,
 268                 .issue                  = io_statx,
 269                 .cleanup                = io_statx_cleanup,
 270         },
 271         [IORING_OP_READ] = {
 272                 .needs_file             = 1,
 273                 .unbound_nonreg_file    = 1,
 274                 .pollin                 = 1,
 275                 .buffer_select          = 1,
 276                 .plug                   = 1,
 277                 .audit_skip             = 1,
 278                 .ioprio                 = 1,
 279                 .iopoll                 = 1,
 280                 .async_size             = sizeof(struct io_async_rw),
 281                 .name                   = "READ",
 282                 .prep                   = io_prep_rw,
 283                 .issue                  = io_read,
 284                 .fail                   = io_rw_fail,
 285         },
 286         [IORING_OP_WRITE] = {
 287                 .needs_file             = 1,
 288                 .hash_reg_file          = 1,
 289                 .unbound_nonreg_file    = 1,
 290                 .pollout                = 1,
 291                 .plug                   = 1,
 292                 .audit_skip             = 1,
 293                 .ioprio                 = 1,
 294                 .iopoll                 = 1,
 295                 .async_size             = sizeof(struct io_async_rw),
 296                 .name                   = "WRITE",
 297                 .prep                   = io_prep_rw,
 298                 .issue                  = io_write,
 299                 .fail                   = io_rw_fail,
 300         },
 301         [IORING_OP_FADVISE] = {
 302                 .needs_file             = 1,
 303                 .audit_skip             = 1,
 304                 .name                   = "FADVISE",
 305                 .prep                   = io_fadvise_prep,
 306                 .issue                  = io_fadvise,
 307         },
 308         [IORING_OP_MADVISE] = {
 309                 .name                   = "MADVISE",
 310                 .prep                   = io_madvise_prep,
 311                 .issue                  = io_madvise,
 312         },
 313         [IORING_OP_SEND] = {
 314                 .needs_file             = 1,
 315                 .unbound_nonreg_file    = 1,
 316                 .pollout                = 1,
 317                 .audit_skip             = 1,
 318                 .ioprio                 = 1,
 319                 .manual_alloc           = 1,
 320                 .name                   = "SEND",
 321 #if defined(CONFIG_NET)
 322                 .async_size             = sizeof(struct io_async_msghdr),
 323                 .prep                   = io_sendmsg_prep,
 324                 .issue                  = io_send,
 325                 .fail                   = io_sendrecv_fail,
 326                 .prep_async             = io_send_prep_async,
 327 #else
 328                 .prep                   = io_eopnotsupp_prep,
 329 #endif
 330         },
 331         [IORING_OP_RECV] = {
 332                 .needs_file             = 1,
 333                 .unbound_nonreg_file    = 1,
 334                 .pollin                 = 1,
 335                 .buffer_select          = 1,
 336                 .audit_skip             = 1,
 337                 .ioprio                 = 1,
 338                 .name                   = "RECV",
 339 #if defined(CONFIG_NET)
 340                 .prep                   = io_recvmsg_prep,
 341                 .issue                  = io_recv,
 342                 .fail                   = io_sendrecv_fail,
 343 #else
 344                 .prep                   = io_eopnotsupp_prep,
 345 #endif
 346         },
 347         [IORING_OP_OPENAT2] = {
 348                 .name                   = "OPENAT2",
 349                 .prep                   = io_openat2_prep,
 350                 .issue                  = io_openat2,
 351                 .cleanup                = io_open_cleanup,
 352         },
 353         [IORING_OP_EPOLL_CTL] = {
 354                 .unbound_nonreg_file    = 1,
 355                 .audit_skip             = 1,
 356                 .name                   = "EPOLL",
 357 #if defined(CONFIG_EPOLL)
 358                 .prep                   = io_epoll_ctl_prep,
 359                 .issue                  = io_epoll_ctl,
 360 #else
 361                 .prep                   = io_eopnotsupp_prep,
 362 #endif
 363         },
 364         [IORING_OP_SPLICE] = {
 365                 .needs_file             = 1,
 366                 .hash_reg_file          = 1,
 367                 .unbound_nonreg_file    = 1,
 368                 .audit_skip             = 1,
 369                 .name                   = "SPLICE",
 370                 .prep                   = io_splice_prep,
 371                 .issue                  = io_splice,
 372         },
 373         [IORING_OP_PROVIDE_BUFFERS] = {
 374                 .audit_skip             = 1,
 375                 .iopoll                 = 1,
 376                 .name                   = "PROVIDE_BUFFERS",
 377                 .prep                   = io_provide_buffers_prep,
 378                 .issue                  = io_provide_buffers,
 379         },
 380         [IORING_OP_REMOVE_BUFFERS] = {
 381                 .audit_skip             = 1,
 382                 .iopoll                 = 1,
 383                 .name                   = "REMOVE_BUFFERS",
 384                 .prep                   = io_remove_buffers_prep,
 385                 .issue                  = io_remove_buffers,
 386         },
 387         [IORING_OP_TEE] = {
 388                 .needs_file             = 1,
 389                 .hash_reg_file          = 1,
 390                 .unbound_nonreg_file    = 1,
 391                 .audit_skip             = 1,
 392                 .name                   = "TEE",
 393                 .prep                   = io_tee_prep,
 394                 .issue                  = io_tee,
 395         },
 396         [IORING_OP_SHUTDOWN] = {
 397                 .needs_file             = 1,
 398                 .name                   = "SHUTDOWN",
 399 #if defined(CONFIG_NET)
 400                 .prep                   = io_shutdown_prep,
 401                 .issue                  = io_shutdown,
 402 #else
 403                 .prep                   = io_eopnotsupp_prep,
 404 #endif
 405         },
 406         [IORING_OP_RENAMEAT] = {
 407                 .name                   = "RENAMEAT",
 408                 .prep                   = io_renameat_prep,
 409                 .issue                  = io_renameat,
 410                 .cleanup                = io_renameat_cleanup,
 411         },
 412         [IORING_OP_UNLINKAT] = {
 413                 .name                   = "UNLINKAT",
 414                 .prep                   = io_unlinkat_prep,
 415                 .issue                  = io_unlinkat,
 416                 .cleanup                = io_unlinkat_cleanup,
 417         },
 418         [IORING_OP_MKDIRAT] = {
 419                 .name                   = "MKDIRAT",
 420                 .prep                   = io_mkdirat_prep,
 421                 .issue                  = io_mkdirat,
 422                 .cleanup                = io_mkdirat_cleanup,
 423         },
 424         [IORING_OP_SYMLINKAT] = {
 425                 .name                   = "SYMLINKAT",
 426                 .prep                   = io_symlinkat_prep,
 427                 .issue                  = io_symlinkat,
 428                 .cleanup                = io_link_cleanup,
 429         },
 430         [IORING_OP_LINKAT] = {
 431                 .name                   = "LINKAT",
 432                 .prep                   = io_linkat_prep,
 433                 .issue                  = io_linkat,
 434                 .cleanup                = io_link_cleanup,
 435         },
 436         [IORING_OP_MSG_RING] = {
 437                 .needs_file             = 1,
 438                 .iopoll                 = 1,
 439                 .name                   = "MSG_RING",
 440                 .prep                   = io_msg_ring_prep,
 441                 .issue                  = io_msg_ring,
 442         },
 443         [IORING_OP_FSETXATTR] = {
 444                 .needs_file = 1,
 445                 .name                   = "FSETXATTR",
 446                 .prep                   = io_fsetxattr_prep,
 447                 .issue                  = io_fsetxattr,
 448                 .cleanup                = io_xattr_cleanup,
 449         },
 450         [IORING_OP_SETXATTR] = {
 451                 .name                   = "SETXATTR",
 452                 .prep                   = io_setxattr_prep,
 453                 .issue                  = io_setxattr,
 454                 .cleanup                = io_xattr_cleanup,
 455         },
 456         [IORING_OP_FGETXATTR] = {
 457                 .needs_file = 1,
 458                 .name                   = "FGETXATTR",
 459                 .prep                   = io_fgetxattr_prep,
 460                 .issue                  = io_fgetxattr,
 461                 .cleanup                = io_xattr_cleanup,
 462         },
 463         [IORING_OP_GETXATTR] = {
 464                 .name                   = "GETXATTR",
 465                 .prep                   = io_getxattr_prep,
 466                 .issue                  = io_getxattr,
 467                 .cleanup                = io_xattr_cleanup,
 468         },
 469         [IORING_OP_SOCKET] = {
 470                 .audit_skip             = 1,
 471                 .name                   = "SOCKET",
 472 #if defined(CONFIG_NET)
 473                 .prep                   = io_socket_prep,
 474                 .issue                  = io_socket,
 475 #else
 476                 .prep                   = io_eopnotsupp_prep,
 477 #endif
 478         },
 479         [IORING_OP_URING_CMD] = {
 480                 .needs_file             = 1,
 481                 .plug                   = 1,
 482                 .name                   = "URING_CMD",
 483                 .iopoll                 = 1,
 484                 .async_size             = uring_cmd_pdu_size(1),
 485                 .prep                   = io_uring_cmd_prep,
 486                 .issue                  = io_uring_cmd,
 487                 .prep_async             = io_uring_cmd_prep_async,
 488         },
 489         [IORING_OP_SEND_ZC] = {
 490                 .name                   = "SEND_ZC",
 491                 .needs_file             = 1,
 492                 .unbound_nonreg_file    = 1,
 493                 .pollout                = 1,
 494                 .audit_skip             = 1,
 495                 .ioprio                 = 1,
 496                 .manual_alloc           = 1,
 497 #if defined(CONFIG_NET)
 498                 .async_size             = sizeof(struct io_async_msghdr),
 499                 .prep                   = io_send_zc_prep,
 500                 .issue                  = io_send_zc,
 501                 .prep_async             = io_send_prep_async,
 502                 .cleanup                = io_send_zc_cleanup,
 503                 .fail                   = io_sendrecv_fail,
 504 #else
 505                 .prep                   = io_eopnotsupp_prep,
 506 #endif
 507         },
 508         [IORING_OP_SENDMSG_ZC] = {
 509                 .name                   = "SENDMSG_ZC",
 510                 .needs_file             = 1,
 511                 .unbound_nonreg_file    = 1,
 512                 .pollout                = 1,
 513                 .audit_skip             = 1,
 514                 .ioprio                 = 1,
 515                 .manual_alloc           = 1,
 516 #if defined(CONFIG_NET)
 517                 .async_size             = sizeof(struct io_async_msghdr),
 518                 .prep                   = io_send_zc_prep,
 519                 .issue                  = io_sendmsg_zc,
 520                 .prep_async             = io_sendmsg_prep_async,
 521                 .cleanup                = io_send_zc_cleanup,
 522                 .fail                   = io_sendrecv_fail,
 523 #else
 524                 .prep                   = io_eopnotsupp_prep,
 525 #endif
 526         },
 527 };
 528
 529 const char *io_uring_get_opcode(u8 opcode)
 530 {
 531         if (opcode < IORING_OP_LAST)
 532                 return io_op_defs[opcode].name;
 533         return "INVALID";
 534 }
 535
 536 void __init io_uring_optable_init(void)
 537 {
 538         int i;
 539
 540         BUILD_BUG_ON(ARRAY_SIZE(io_op_defs) != IORING_OP_LAST);
 541
 542         for (i = 0; i < ARRAY_SIZE(io_op_defs); i++) {
 543                 BUG_ON(!io_op_defs[i].prep);
 544                 if (io_op_defs[i].prep != io_eopnotsupp_prep)
 545                         BUG_ON(!io_op_defs[i].issue);
 546                 WARN_ON_ONCE(!io_op_defs[i].name);
 547         }
 548 }