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_RSRC_UPDATE] = {
 250                 .audit_skip             = 1,
 251                 .iopoll                 = 1,
 252                 .name                   = "RSRC_UPDATE",
 253                 .prep                   = io_rsrc_update_prep,
 254                 .issue                  = io_rsrc_update,
 255                 .ioprio                 = 1,
 256         },
 257         [IORING_OP_STATX] = {
 258                 .audit_skip             = 1,
 259                 .name                   = "STATX",
 260                 .prep                   = io_statx_prep,
 261                 .issue                  = io_statx,
 262                 .cleanup                = io_statx_cleanup,
 263         },
 264         [IORING_OP_READ] = {
 265                 .needs_file             = 1,
 266                 .unbound_nonreg_file    = 1,
 267                 .pollin                 = 1,
 268                 .buffer_select          = 1,
 269                 .plug                   = 1,
 270                 .audit_skip             = 1,
 271                 .ioprio                 = 1,
 272                 .iopoll                 = 1,
 273                 .async_size             = sizeof(struct io_async_rw),
 274                 .name                   = "READ",
 275                 .prep                   = io_prep_rw,
 276                 .issue                  = io_read,
 277         },
 278         [IORING_OP_WRITE] = {
 279                 .needs_file             = 1,
 280                 .hash_reg_file          = 1,
 281                 .unbound_nonreg_file    = 1,
 282                 .pollout                = 1,
 283                 .plug                   = 1,
 284                 .audit_skip             = 1,
 285                 .ioprio                 = 1,
 286                 .iopoll                 = 1,
 287                 .async_size             = sizeof(struct io_async_rw),
 288                 .name                   = "WRITE",
 289                 .prep                   = io_prep_rw,
 290                 .issue                  = io_write,
 291         },
 292         [IORING_OP_FADVISE] = {
 293                 .needs_file             = 1,
 294                 .audit_skip             = 1,
 295                 .name                   = "FADVISE",
 296                 .prep                   = io_fadvise_prep,
 297                 .issue                  = io_fadvise,
 298         },
 299         [IORING_OP_MADVISE] = {
 300                 .name                   = "MADVISE",
 301                 .prep                   = io_madvise_prep,
 302                 .issue                  = io_madvise,
 303         },
 304         [IORING_OP_SEND] = {
 305                 .needs_file             = 1,
 306                 .unbound_nonreg_file    = 1,
 307                 .pollout                = 1,
 308                 .audit_skip             = 1,
 309                 .ioprio                 = 1,
 310                 .name                   = "SEND",
 311 #if defined(CONFIG_NET)
 312                 .prep                   = io_sendmsg_prep,
 313                 .issue                  = io_send,
 314 #else
 315                 .prep                   = io_eopnotsupp_prep,
 316 #endif
 317         },
 318         [IORING_OP_RECV] = {
 319                 .needs_file             = 1,
 320                 .unbound_nonreg_file    = 1,
 321                 .pollin                 = 1,
 322                 .buffer_select          = 1,
 323                 .audit_skip             = 1,
 324                 .ioprio                 = 1,
 325                 .name                   = "RECV",
 326 #if defined(CONFIG_NET)
 327                 .prep                   = io_recvmsg_prep,
 328                 .issue                  = io_recv,
 329 #else
 330                 .prep                   = io_eopnotsupp_prep,
 331 #endif
 332         },
 333         [IORING_OP_OPENAT2] = {
 334                 .name                   = "OPENAT2",
 335                 .prep                   = io_openat2_prep,
 336                 .issue                  = io_openat2,
 337                 .cleanup                = io_open_cleanup,
 338         },
 339         [IORING_OP_EPOLL_CTL] = {
 340                 .unbound_nonreg_file    = 1,
 341                 .audit_skip             = 1,
 342                 .name                   = "EPOLL",
 343 #if defined(CONFIG_EPOLL)
 344                 .prep                   = io_epoll_ctl_prep,
 345                 .issue                  = io_epoll_ctl,
 346 #else
 347                 .prep                   = io_eopnotsupp_prep,
 348 #endif
 349         },
 350         [IORING_OP_SPLICE] = {
 351                 .needs_file             = 1,
 352                 .hash_reg_file          = 1,
 353                 .unbound_nonreg_file    = 1,
 354                 .audit_skip             = 1,
 355                 .name                   = "SPLICE",
 356                 .prep                   = io_splice_prep,
 357                 .issue                  = io_splice,
 358         },
 359         [IORING_OP_PROVIDE_BUFFERS] = {
 360                 .audit_skip             = 1,
 361                 .iopoll                 = 1,
 362                 .name                   = "PROVIDE_BUFFERS",
 363                 .prep                   = io_provide_buffers_prep,
 364                 .issue                  = io_provide_buffers,
 365         },
 366         [IORING_OP_REMOVE_BUFFERS] = {
 367                 .audit_skip             = 1,
 368                 .iopoll                 = 1,
 369                 .name                   = "REMOVE_BUFFERS",
 370                 .prep                   = io_remove_buffers_prep,
 371                 .issue                  = io_remove_buffers,
 372         },
 373         [IORING_OP_TEE] = {
 374                 .needs_file             = 1,
 375                 .hash_reg_file          = 1,
 376                 .unbound_nonreg_file    = 1,
 377                 .audit_skip             = 1,
 378                 .name                   = "TEE",
 379                 .prep                   = io_tee_prep,
 380                 .issue                  = io_tee,
 381         },
 382         [IORING_OP_SHUTDOWN] = {
 383                 .needs_file             = 1,
 384                 .name                   = "SHUTDOWN",
 385 #if defined(CONFIG_NET)
 386                 .prep                   = io_shutdown_prep,
 387                 .issue                  = io_shutdown,
 388 #else
 389                 .prep                   = io_eopnotsupp_prep,
 390 #endif
 391         },
 392         [IORING_OP_RENAMEAT] = {
 393                 .name                   = "RENAMEAT",
 394                 .prep                   = io_renameat_prep,
 395                 .issue                  = io_renameat,
 396                 .cleanup                = io_renameat_cleanup,
 397         },
 398         [IORING_OP_UNLINKAT] = {
 399                 .name                   = "UNLINKAT",
 400                 .prep                   = io_unlinkat_prep,
 401                 .issue                  = io_unlinkat,
 402                 .cleanup                = io_unlinkat_cleanup,
 403         },
 404         [IORING_OP_MKDIRAT] = {
 405                 .name                   = "MKDIRAT",
 406                 .prep                   = io_mkdirat_prep,
 407                 .issue                  = io_mkdirat,
 408                 .cleanup                = io_mkdirat_cleanup,
 409         },
 410         [IORING_OP_SYMLINKAT] = {
 411                 .name                   = "SYMLINKAT",
 412                 .prep                   = io_symlinkat_prep,
 413                 .issue                  = io_symlinkat,
 414                 .cleanup                = io_link_cleanup,
 415         },
 416         [IORING_OP_LINKAT] = {
 417                 .name                   = "LINKAT",
 418                 .prep                   = io_linkat_prep,
 419                 .issue                  = io_linkat,
 420                 .cleanup                = io_link_cleanup,
 421         },
 422         [IORING_OP_MSG_RING] = {
 423                 .needs_file             = 1,
 424                 .iopoll                 = 1,
 425                 .name                   = "MSG_RING",
 426                 .prep                   = io_msg_ring_prep,
 427                 .issue                  = io_msg_ring,
 428         },
 429         [IORING_OP_FSETXATTR] = {
 430                 .needs_file = 1,
 431                 .name                   = "FSETXATTR",
 432                 .prep                   = io_fsetxattr_prep,
 433                 .issue                  = io_fsetxattr,
 434                 .cleanup                = io_xattr_cleanup,
 435         },
 436         [IORING_OP_SETXATTR] = {
 437                 .name                   = "SETXATTR",
 438                 .prep                   = io_setxattr_prep,
 439                 .issue                  = io_setxattr,
 440                 .cleanup                = io_xattr_cleanup,
 441         },
 442         [IORING_OP_FGETXATTR] = {
 443                 .needs_file = 1,
 444                 .name                   = "FGETXATTR",
 445                 .prep                   = io_fgetxattr_prep,
 446                 .issue                  = io_fgetxattr,
 447                 .cleanup                = io_xattr_cleanup,
 448         },
 449         [IORING_OP_GETXATTR] = {
 450                 .name                   = "GETXATTR",
 451                 .prep                   = io_getxattr_prep,
 452                 .issue                  = io_getxattr,
 453                 .cleanup                = io_xattr_cleanup,
 454         },
 455         [IORING_OP_SOCKET] = {
 456                 .audit_skip             = 1,
 457                 .name                   = "SOCKET",
 458 #if defined(CONFIG_NET)
 459                 .prep                   = io_socket_prep,
 460                 .issue                  = io_socket,
 461 #else
 462                 .prep                   = io_eopnotsupp_prep,
 463 #endif
 464         },
 465         [IORING_OP_URING_CMD] = {
 466                 .needs_file             = 1,
 467                 .plug                   = 1,
 468                 .name                   = "URING_CMD",
 469                 .async_size             = uring_cmd_pdu_size(1),
 470                 .prep                   = io_uring_cmd_prep,
 471                 .issue                  = io_uring_cmd,
 472                 .prep_async             = io_uring_cmd_prep_async,
 473         },
 474         [IORING_OP_SENDZC_NOTIF] = {
 475                 .name                   = "SENDZC_NOTIF",
 476                 .needs_file             = 1,
 477                 .unbound_nonreg_file    = 1,
 478                 .pollout                = 1,
 479                 .audit_skip             = 1,
 480                 .ioprio                 = 1,
 481 #if defined(CONFIG_NET)
 482                 .prep                   = io_sendzc_prep,
 483                 .issue                  = io_sendzc,
 484 #else
 485                 .prep                   = io_eopnotsupp_prep,
 486 #endif
 487
 488         },
 489 };
 490
 491 const char *io_uring_get_opcode(u8 opcode)
 492 {
 493         if (opcode < IORING_OP_LAST)
 494                 return io_op_defs[opcode].name;
 495         return "INVALID";
 496 }
 497
 498 void __init io_uring_optable_init(void)
 499 {
 500         int i;
 501
 502         BUILD_BUG_ON(ARRAY_SIZE(io_op_defs) != IORING_OP_LAST);
 503
 504         for (i = 0; i < ARRAY_SIZE(io_op_defs); i++) {
 505                 BUG_ON(!io_op_defs[i].prep);
 506                 if (io_op_defs[i].prep != io_eopnotsupp_prep)
 507                         BUG_ON(!io_op_defs[i].issue);
 508                 WARN_ON_ONCE(!io_op_defs[i].name);
 509         }
 510 }