epolltable-internal.h

   1 /*
   2  * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
   3  * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27 #ifndef EPOLLTABLE_INTERNAL_H_INCLUDED_
  28 #define EPOLLTABLE_INTERNAL_H_INCLUDED_
  29
  30 /*
  31   Here are the values we're masking off to decide what operations to do.
  32   Note that since EV_READ|EV_WRITE.
  33
  34   Note also that this table is a little sparse, since ADD+DEL is
  35   nonsensical ("xxx" in the list below.)
  36
  37   Note also also that we are shifting old_events by only 5 bits, since
  38   EV_READ is 2 and EV_WRITE is 4.
  39
  40   The table was auto-generated with a python script, according to this
  41   pseudocode:[*0]
  42
  43       If either the read or the write change is add+del:
  44          This is impossible; Set op==-1, events=0.
  45       Else, if either the read or the write change is add:
  46          Set events to 0.
  47          If the read change is add, or
  48             (the read change is not del, and ev_read is in old_events):
  49                Add EPOLLIN to events.
  50          If the write change is add, or
  51             (the write change is not del, and ev_write is in old_events):
  52                Add EPOLLOUT to events.
  53
  54          If old_events is set:
  55                Set op to EPOLL_CTL_MOD [*1,*2]
  56         Else:
  57                Set op to EPOLL_CTL_ADD [*3]
  58
  59       Else, if the read or the write change is del:
  60          Set op to EPOLL_CTL_DEL.
  61          If the read change is del:
  62              If the write change is del:
  63                  Set events to EPOLLIN|EPOLLOUT
  64              Else if ev_write is in old_events:
  65                  Set events to EPOLLOUT
  66                 Set op to EPOLL_CTL_MOD
  67              Else
  68                  Set events to EPOLLIN
  69          Else:
  70              {The write change is del.}
  71             If ev_read is in old_events:
  72                  Set events to EPOLLIN
  73                 Set op to EPOLL_CTL_MOD
  74             Else:
  75                 Set the events to EPOLLOUT
  76
  77       Else:
  78            There is no read or write change; set op to 0 and events to 0.
  79
  80       The logic is a little tricky, since we had no events set on the fd before,
  81       we need to set op="ADD" and set events=the events we want to add.  If we
  82       had any events set on the fd before, and we want any events to remain on
  83       the fd, we need to say op="MOD" and set events=the events we want to
  84       remain.  But if we want to delete the last event, we say op="DEL" and
  85       set events=(any non-null pointer).
  86
  87   [*0] Actually, the Python script has gotten a bit more complicated, to
  88        support EPOLLRDHUP.
  89
  90   [*1] This MOD is only a guess.  MOD might fail with ENOENT if the file was
  91        closed and a new file was opened with the same fd.  If so, we'll retry
  92        with ADD.
  93
  94   [*2] We can't replace this with a no-op even if old_events is the same as
  95        the new events: if the file was closed and reopened, we need to retry
  96        with an ADD.  (We do a MOD in this case since "no change" is more
  97        common than "close and reopen", so we'll usually wind up doing 1
  98        syscalls instead of 2.)
  99
 100   [*3] This ADD is only a guess.  There is a fun Linux kernel issue where if
 101        you have two fds for the same file (via dup) and you ADD one to an
 102        epfd, then close it, then re-create it with the same fd (via dup2 or an
 103        unlucky dup), then try to ADD it again, you'll get an EEXIST, since the
 104        struct epitem is not actually removed from the struct eventpoll until
 105        the file itself is closed.
 106
 107   EV_CHANGE_ADD==1
 108   EV_CHANGE_DEL==2
 109   EV_READ      ==2
 110   EV_WRITE     ==4
 111   EV_CLOSED    ==0x80
 112
 113   Bit 0: close change is add
 114   Bit 1: close change is del
 115   Bit 2: read change is add
 116   Bit 3: read change is del
 117   Bit 4: write change is add
 118   Bit 5: write change is del
 119   Bit 6: old events had EV_READ
 120   Bit 7: old events had EV_WRITE
 121   Bit 8: old events had EV_CLOSED
 122 */
 123
 124 #define EPOLL_OP_TABLE_INDEX(c) \
 125         (   (((c)->close_change&(EV_CHANGE_ADD|EV_CHANGE_DEL))) |               \
 126             (((c)->read_change&(EV_CHANGE_ADD|EV_CHANGE_DEL)) << 2) |   \
 127             (((c)->write_change&(EV_CHANGE_ADD|EV_CHANGE_DEL)) << 4) |  \
 128             (((c)->old_events&(EV_READ|EV_WRITE)) << 5) |               \
 129             (((c)->old_events&(EV_CLOSED)) << 1)                                \
 130             )
 131
 132 #if EV_READ != 2 || EV_WRITE != 4 || EV_CLOSED != 0x80 || EV_CHANGE_ADD != 1 || EV_CHANGE_DEL != 2
 133 #error "Libevent's internals changed!  Regenerate the op_table in epolltable-internal.h"
 134 #endif
 135
 136 static const struct operation {
 137         int events;
 138         int op;
 139 } epoll_op_table[] = {
 140         /* old=  0, write:  0, read:  0, close:  0 */
 141         { 0, 0 },
 142         /* old=  0, write:  0, read:  0, close:add */
 143         { EPOLLRDHUP, EPOLL_CTL_ADD },
 144         /* old=  0, write:  0, read:  0, close:del */
 145         { EPOLLRDHUP, EPOLL_CTL_DEL },
 146         /* old=  0, write:  0, read:  0, close:xxx */
 147         { 0, 255 },
 148         /* old=  0, write:  0, read:add, close:  0 */
 149         { EPOLLIN, EPOLL_CTL_ADD },
 150         /* old=  0, write:  0, read:add, close:add */
 151         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_ADD },
 152         /* old=  0, write:  0, read:add, close:del */
 153         { EPOLLIN, EPOLL_CTL_ADD },
 154         /* old=  0, write:  0, read:add, close:xxx */
 155         { 0, 255 },
 156         /* old=  0, write:  0, read:del, close:  0 */
 157         { EPOLLIN, EPOLL_CTL_DEL },
 158         /* old=  0, write:  0, read:del, close:add */
 159         { EPOLLRDHUP, EPOLL_CTL_ADD },
 160         /* old=  0, write:  0, read:del, close:del */
 161         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_DEL },
 162         /* old=  0, write:  0, read:del, close:xxx */
 163         { 0, 255 },
 164         /* old=  0, write:  0, read:xxx, close:  0 */
 165         { 0, 255 },
 166         /* old=  0, write:  0, read:xxx, close:add */
 167         { 0, 255 },
 168         /* old=  0, write:  0, read:xxx, close:del */
 169         { 0, 255 },
 170         /* old=  0, write:  0, read:xxx, close:xxx */
 171         { 0, 255 },
 172         /* old=  0, write:add, read:  0, close:  0 */
 173         { EPOLLOUT, EPOLL_CTL_ADD },
 174         /* old=  0, write:add, read:  0, close:add */
 175         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_ADD },
 176         /* old=  0, write:add, read:  0, close:del */
 177         { EPOLLOUT, EPOLL_CTL_ADD },
 178         /* old=  0, write:add, read:  0, close:xxx */
 179         { 0, 255 },
 180         /* old=  0, write:add, read:add, close:  0 */
 181         { EPOLLIN|EPOLLOUT, EPOLL_CTL_ADD },
 182         /* old=  0, write:add, read:add, close:add */
 183         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_ADD },
 184         /* old=  0, write:add, read:add, close:del */
 185         { EPOLLIN|EPOLLOUT, EPOLL_CTL_ADD },
 186         /* old=  0, write:add, read:add, close:xxx */
 187         { 0, 255 },
 188         /* old=  0, write:add, read:del, close:  0 */
 189         { EPOLLOUT, EPOLL_CTL_ADD },
 190         /* old=  0, write:add, read:del, close:add */
 191         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_ADD },
 192         /* old=  0, write:add, read:del, close:del */
 193         { EPOLLOUT, EPOLL_CTL_ADD },
 194         /* old=  0, write:add, read:del, close:xxx */
 195         { 0, 255 },
 196         /* old=  0, write:add, read:xxx, close:  0 */
 197         { 0, 255 },
 198         /* old=  0, write:add, read:xxx, close:add */
 199         { 0, 255 },
 200         /* old=  0, write:add, read:xxx, close:del */
 201         { 0, 255 },
 202         /* old=  0, write:add, read:xxx, close:xxx */
 203         { 0, 255 },
 204         /* old=  0, write:del, read:  0, close:  0 */
 205         { EPOLLOUT, EPOLL_CTL_DEL },
 206         /* old=  0, write:del, read:  0, close:add */
 207         { EPOLLRDHUP, EPOLL_CTL_ADD },
 208         /* old=  0, write:del, read:  0, close:del */
 209         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 210         /* old=  0, write:del, read:  0, close:xxx */
 211         { 0, 255 },
 212         /* old=  0, write:del, read:add, close:  0 */
 213         { EPOLLIN, EPOLL_CTL_ADD },
 214         /* old=  0, write:del, read:add, close:add */
 215         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_ADD },
 216         /* old=  0, write:del, read:add, close:del */
 217         { EPOLLIN, EPOLL_CTL_ADD },
 218         /* old=  0, write:del, read:add, close:xxx */
 219         { 0, 255 },
 220         /* old=  0, write:del, read:del, close:  0 */
 221         { EPOLLIN|EPOLLOUT, EPOLL_CTL_DEL },
 222         /* old=  0, write:del, read:del, close:add */
 223         { EPOLLRDHUP, EPOLL_CTL_ADD },
 224         /* old=  0, write:del, read:del, close:del */
 225         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 226         /* old=  0, write:del, read:del, close:xxx */
 227         { 0, 255 },
 228         /* old=  0, write:del, read:xxx, close:  0 */
 229         { 0, 255 },
 230         /* old=  0, write:del, read:xxx, close:add */
 231         { 0, 255 },
 232         /* old=  0, write:del, read:xxx, close:del */
 233         { 0, 255 },
 234         /* old=  0, write:del, read:xxx, close:xxx */
 235         { 0, 255 },
 236         /* old=  0, write:xxx, read:  0, close:  0 */
 237         { 0, 255 },
 238         /* old=  0, write:xxx, read:  0, close:add */
 239         { 0, 255 },
 240         /* old=  0, write:xxx, read:  0, close:del */
 241         { 0, 255 },
 242         /* old=  0, write:xxx, read:  0, close:xxx */
 243         { 0, 255 },
 244         /* old=  0, write:xxx, read:add, close:  0 */
 245         { 0, 255 },
 246         /* old=  0, write:xxx, read:add, close:add */
 247         { 0, 255 },
 248         /* old=  0, write:xxx, read:add, close:del */
 249         { 0, 255 },
 250         /* old=  0, write:xxx, read:add, close:xxx */
 251         { 0, 255 },
 252         /* old=  0, write:xxx, read:del, close:  0 */
 253         { 0, 255 },
 254         /* old=  0, write:xxx, read:del, close:add */
 255         { 0, 255 },
 256         /* old=  0, write:xxx, read:del, close:del */
 257         { 0, 255 },
 258         /* old=  0, write:xxx, read:del, close:xxx */
 259         { 0, 255 },
 260         /* old=  0, write:xxx, read:xxx, close:  0 */
 261         { 0, 255 },
 262         /* old=  0, write:xxx, read:xxx, close:add */
 263         { 0, 255 },
 264         /* old=  0, write:xxx, read:xxx, close:del */
 265         { 0, 255 },
 266         /* old=  0, write:xxx, read:xxx, close:xxx */
 267         { 0, 255 },
 268         /* old=  r, write:  0, read:  0, close:  0 */
 269         { 0, 0 },
 270         /* old=  r, write:  0, read:  0, close:add */
 271         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 272         /* old=  r, write:  0, read:  0, close:del */
 273         { EPOLLIN, EPOLL_CTL_MOD },
 274         /* old=  r, write:  0, read:  0, close:xxx */
 275         { 0, 255 },
 276         /* old=  r, write:  0, read:add, close:  0 */
 277         { EPOLLIN, EPOLL_CTL_MOD },
 278         /* old=  r, write:  0, read:add, close:add */
 279         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 280         /* old=  r, write:  0, read:add, close:del */
 281         { EPOLLIN, EPOLL_CTL_MOD },
 282         /* old=  r, write:  0, read:add, close:xxx */
 283         { 0, 255 },
 284         /* old=  r, write:  0, read:del, close:  0 */
 285         { EPOLLIN, EPOLL_CTL_DEL },
 286         /* old=  r, write:  0, read:del, close:add */
 287         { EPOLLRDHUP, EPOLL_CTL_MOD },
 288         /* old=  r, write:  0, read:del, close:del */
 289         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_DEL },
 290         /* old=  r, write:  0, read:del, close:xxx */
 291         { 0, 255 },
 292         /* old=  r, write:  0, read:xxx, close:  0 */
 293         { 0, 255 },
 294         /* old=  r, write:  0, read:xxx, close:add */
 295         { 0, 255 },
 296         /* old=  r, write:  0, read:xxx, close:del */
 297         { 0, 255 },
 298         /* old=  r, write:  0, read:xxx, close:xxx */
 299         { 0, 255 },
 300         /* old=  r, write:add, read:  0, close:  0 */
 301         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 302         /* old=  r, write:add, read:  0, close:add */
 303         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 304         /* old=  r, write:add, read:  0, close:del */
 305         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 306         /* old=  r, write:add, read:  0, close:xxx */
 307         { 0, 255 },
 308         /* old=  r, write:add, read:add, close:  0 */
 309         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 310         /* old=  r, write:add, read:add, close:add */
 311         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 312         /* old=  r, write:add, read:add, close:del */
 313         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 314         /* old=  r, write:add, read:add, close:xxx */
 315         { 0, 255 },
 316         /* old=  r, write:add, read:del, close:  0 */
 317         { EPOLLOUT, EPOLL_CTL_MOD },
 318         /* old=  r, write:add, read:del, close:add */
 319         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 320         /* old=  r, write:add, read:del, close:del */
 321         { EPOLLOUT, EPOLL_CTL_MOD },
 322         /* old=  r, write:add, read:del, close:xxx */
 323         { 0, 255 },
 324         /* old=  r, write:add, read:xxx, close:  0 */
 325         { 0, 255 },
 326         /* old=  r, write:add, read:xxx, close:add */
 327         { 0, 255 },
 328         /* old=  r, write:add, read:xxx, close:del */
 329         { 0, 255 },
 330         /* old=  r, write:add, read:xxx, close:xxx */
 331         { 0, 255 },
 332         /* old=  r, write:del, read:  0, close:  0 */
 333         { EPOLLIN, EPOLL_CTL_MOD },
 334         /* old=  r, write:del, read:  0, close:add */
 335         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 336         /* old=  r, write:del, read:  0, close:del */
 337         { EPOLLIN, EPOLL_CTL_MOD },
 338         /* old=  r, write:del, read:  0, close:xxx */
 339         { 0, 255 },
 340         /* old=  r, write:del, read:add, close:  0 */
 341         { EPOLLIN, EPOLL_CTL_MOD },
 342         /* old=  r, write:del, read:add, close:add */
 343         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 344         /* old=  r, write:del, read:add, close:del */
 345         { EPOLLIN, EPOLL_CTL_MOD },
 346         /* old=  r, write:del, read:add, close:xxx */
 347         { 0, 255 },
 348         /* old=  r, write:del, read:del, close:  0 */
 349         { EPOLLIN|EPOLLOUT, EPOLL_CTL_DEL },
 350         /* old=  r, write:del, read:del, close:add */
 351         { EPOLLRDHUP, EPOLL_CTL_MOD },
 352         /* old=  r, write:del, read:del, close:del */
 353         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 354         /* old=  r, write:del, read:del, close:xxx */
 355         { 0, 255 },
 356         /* old=  r, write:del, read:xxx, close:  0 */
 357         { 0, 255 },
 358         /* old=  r, write:del, read:xxx, close:add */
 359         { 0, 255 },
 360         /* old=  r, write:del, read:xxx, close:del */
 361         { 0, 255 },
 362         /* old=  r, write:del, read:xxx, close:xxx */
 363         { 0, 255 },
 364         /* old=  r, write:xxx, read:  0, close:  0 */
 365         { 0, 255 },
 366         /* old=  r, write:xxx, read:  0, close:add */
 367         { 0, 255 },
 368         /* old=  r, write:xxx, read:  0, close:del */
 369         { 0, 255 },
 370         /* old=  r, write:xxx, read:  0, close:xxx */
 371         { 0, 255 },
 372         /* old=  r, write:xxx, read:add, close:  0 */
 373         { 0, 255 },
 374         /* old=  r, write:xxx, read:add, close:add */
 375         { 0, 255 },
 376         /* old=  r, write:xxx, read:add, close:del */
 377         { 0, 255 },
 378         /* old=  r, write:xxx, read:add, close:xxx */
 379         { 0, 255 },
 380         /* old=  r, write:xxx, read:del, close:  0 */
 381         { 0, 255 },
 382         /* old=  r, write:xxx, read:del, close:add */
 383         { 0, 255 },
 384         /* old=  r, write:xxx, read:del, close:del */
 385         { 0, 255 },
 386         /* old=  r, write:xxx, read:del, close:xxx */
 387         { 0, 255 },
 388         /* old=  r, write:xxx, read:xxx, close:  0 */
 389         { 0, 255 },
 390         /* old=  r, write:xxx, read:xxx, close:add */
 391         { 0, 255 },
 392         /* old=  r, write:xxx, read:xxx, close:del */
 393         { 0, 255 },
 394         /* old=  r, write:xxx, read:xxx, close:xxx */
 395         { 0, 255 },
 396         /* old=  w, write:  0, read:  0, close:  0 */
 397         { 0, 0 },
 398         /* old=  w, write:  0, read:  0, close:add */
 399         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 400         /* old=  w, write:  0, read:  0, close:del */
 401         { EPOLLOUT, EPOLL_CTL_MOD },
 402         /* old=  w, write:  0, read:  0, close:xxx */
 403         { 0, 255 },
 404         /* old=  w, write:  0, read:add, close:  0 */
 405         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 406         /* old=  w, write:  0, read:add, close:add */
 407         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 408         /* old=  w, write:  0, read:add, close:del */
 409         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 410         /* old=  w, write:  0, read:add, close:xxx */
 411         { 0, 255 },
 412         /* old=  w, write:  0, read:del, close:  0 */
 413         { EPOLLOUT, EPOLL_CTL_MOD },
 414         /* old=  w, write:  0, read:del, close:add */
 415         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 416         /* old=  w, write:  0, read:del, close:del */
 417         { EPOLLOUT, EPOLL_CTL_MOD },
 418         /* old=  w, write:  0, read:del, close:xxx */
 419         { 0, 255 },
 420         /* old=  w, write:  0, read:xxx, close:  0 */
 421         { 0, 255 },
 422         /* old=  w, write:  0, read:xxx, close:add */
 423         { 0, 255 },
 424         /* old=  w, write:  0, read:xxx, close:del */
 425         { 0, 255 },
 426         /* old=  w, write:  0, read:xxx, close:xxx */
 427         { 0, 255 },
 428         /* old=  w, write:add, read:  0, close:  0 */
 429         { EPOLLOUT, EPOLL_CTL_MOD },
 430         /* old=  w, write:add, read:  0, close:add */
 431         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 432         /* old=  w, write:add, read:  0, close:del */
 433         { EPOLLOUT, EPOLL_CTL_MOD },
 434         /* old=  w, write:add, read:  0, close:xxx */
 435         { 0, 255 },
 436         /* old=  w, write:add, read:add, close:  0 */
 437         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 438         /* old=  w, write:add, read:add, close:add */
 439         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 440         /* old=  w, write:add, read:add, close:del */
 441         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 442         /* old=  w, write:add, read:add, close:xxx */
 443         { 0, 255 },
 444         /* old=  w, write:add, read:del, close:  0 */
 445         { EPOLLOUT, EPOLL_CTL_MOD },
 446         /* old=  w, write:add, read:del, close:add */
 447         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 448         /* old=  w, write:add, read:del, close:del */
 449         { EPOLLOUT, EPOLL_CTL_MOD },
 450         /* old=  w, write:add, read:del, close:xxx */
 451         { 0, 255 },
 452         /* old=  w, write:add, read:xxx, close:  0 */
 453         { 0, 255 },
 454         /* old=  w, write:add, read:xxx, close:add */
 455         { 0, 255 },
 456         /* old=  w, write:add, read:xxx, close:del */
 457         { 0, 255 },
 458         /* old=  w, write:add, read:xxx, close:xxx */
 459         { 0, 255 },
 460         /* old=  w, write:del, read:  0, close:  0 */
 461         { EPOLLOUT, EPOLL_CTL_DEL },
 462         /* old=  w, write:del, read:  0, close:add */
 463         { EPOLLRDHUP, EPOLL_CTL_MOD },
 464         /* old=  w, write:del, read:  0, close:del */
 465         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 466         /* old=  w, write:del, read:  0, close:xxx */
 467         { 0, 255 },
 468         /* old=  w, write:del, read:add, close:  0 */
 469         { EPOLLIN, EPOLL_CTL_MOD },
 470         /* old=  w, write:del, read:add, close:add */
 471         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 472         /* old=  w, write:del, read:add, close:del */
 473         { EPOLLIN, EPOLL_CTL_MOD },
 474         /* old=  w, write:del, read:add, close:xxx */
 475         { 0, 255 },
 476         /* old=  w, write:del, read:del, close:  0 */
 477         { EPOLLIN|EPOLLOUT, EPOLL_CTL_DEL },
 478         /* old=  w, write:del, read:del, close:add */
 479         { EPOLLRDHUP, EPOLL_CTL_MOD },
 480         /* old=  w, write:del, read:del, close:del */
 481         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 482         /* old=  w, write:del, read:del, close:xxx */
 483         { 0, 255 },
 484         /* old=  w, write:del, read:xxx, close:  0 */
 485         { 0, 255 },
 486         /* old=  w, write:del, read:xxx, close:add */
 487         { 0, 255 },
 488         /* old=  w, write:del, read:xxx, close:del */
 489         { 0, 255 },
 490         /* old=  w, write:del, read:xxx, close:xxx */
 491         { 0, 255 },
 492         /* old=  w, write:xxx, read:  0, close:  0 */
 493         { 0, 255 },
 494         /* old=  w, write:xxx, read:  0, close:add */
 495         { 0, 255 },
 496         /* old=  w, write:xxx, read:  0, close:del */
 497         { 0, 255 },
 498         /* old=  w, write:xxx, read:  0, close:xxx */
 499         { 0, 255 },
 500         /* old=  w, write:xxx, read:add, close:  0 */
 501         { 0, 255 },
 502         /* old=  w, write:xxx, read:add, close:add */
 503         { 0, 255 },
 504         /* old=  w, write:xxx, read:add, close:del */
 505         { 0, 255 },
 506         /* old=  w, write:xxx, read:add, close:xxx */
 507         { 0, 255 },
 508         /* old=  w, write:xxx, read:del, close:  0 */
 509         { 0, 255 },
 510         /* old=  w, write:xxx, read:del, close:add */
 511         { 0, 255 },
 512         /* old=  w, write:xxx, read:del, close:del */
 513         { 0, 255 },
 514         /* old=  w, write:xxx, read:del, close:xxx */
 515         { 0, 255 },
 516         /* old=  w, write:xxx, read:xxx, close:  0 */
 517         { 0, 255 },
 518         /* old=  w, write:xxx, read:xxx, close:add */
 519         { 0, 255 },
 520         /* old=  w, write:xxx, read:xxx, close:del */
 521         { 0, 255 },
 522         /* old=  w, write:xxx, read:xxx, close:xxx */
 523         { 0, 255 },
 524         /* old= rw, write:  0, read:  0, close:  0 */
 525         { 0, 0 },
 526         /* old= rw, write:  0, read:  0, close:add */
 527         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 528         /* old= rw, write:  0, read:  0, close:del */
 529         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 530         /* old= rw, write:  0, read:  0, close:xxx */
 531         { 0, 255 },
 532         /* old= rw, write:  0, read:add, close:  0 */
 533         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 534         /* old= rw, write:  0, read:add, close:add */
 535         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 536         /* old= rw, write:  0, read:add, close:del */
 537         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 538         /* old= rw, write:  0, read:add, close:xxx */
 539         { 0, 255 },
 540         /* old= rw, write:  0, read:del, close:  0 */
 541         { EPOLLOUT, EPOLL_CTL_MOD },
 542         /* old= rw, write:  0, read:del, close:add */
 543         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 544         /* old= rw, write:  0, read:del, close:del */
 545         { EPOLLOUT, EPOLL_CTL_MOD },
 546         /* old= rw, write:  0, read:del, close:xxx */
 547         { 0, 255 },
 548         /* old= rw, write:  0, read:xxx, close:  0 */
 549         { 0, 255 },
 550         /* old= rw, write:  0, read:xxx, close:add */
 551         { 0, 255 },
 552         /* old= rw, write:  0, read:xxx, close:del */
 553         { 0, 255 },
 554         /* old= rw, write:  0, read:xxx, close:xxx */
 555         { 0, 255 },
 556         /* old= rw, write:add, read:  0, close:  0 */
 557         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 558         /* old= rw, write:add, read:  0, close:add */
 559         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 560         /* old= rw, write:add, read:  0, close:del */
 561         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 562         /* old= rw, write:add, read:  0, close:xxx */
 563         { 0, 255 },
 564         /* old= rw, write:add, read:add, close:  0 */
 565         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 566         /* old= rw, write:add, read:add, close:add */
 567         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 568         /* old= rw, write:add, read:add, close:del */
 569         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 570         /* old= rw, write:add, read:add, close:xxx */
 571         { 0, 255 },
 572         /* old= rw, write:add, read:del, close:  0 */
 573         { EPOLLOUT, EPOLL_CTL_MOD },
 574         /* old= rw, write:add, read:del, close:add */
 575         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 576         /* old= rw, write:add, read:del, close:del */
 577         { EPOLLOUT, EPOLL_CTL_MOD },
 578         /* old= rw, write:add, read:del, close:xxx */
 579         { 0, 255 },
 580         /* old= rw, write:add, read:xxx, close:  0 */
 581         { 0, 255 },
 582         /* old= rw, write:add, read:xxx, close:add */
 583         { 0, 255 },
 584         /* old= rw, write:add, read:xxx, close:del */
 585         { 0, 255 },
 586         /* old= rw, write:add, read:xxx, close:xxx */
 587         { 0, 255 },
 588         /* old= rw, write:del, read:  0, close:  0 */
 589         { EPOLLIN, EPOLL_CTL_MOD },
 590         /* old= rw, write:del, read:  0, close:add */
 591         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 592         /* old= rw, write:del, read:  0, close:del */
 593         { EPOLLIN, EPOLL_CTL_MOD },
 594         /* old= rw, write:del, read:  0, close:xxx */
 595         { 0, 255 },
 596         /* old= rw, write:del, read:add, close:  0 */
 597         { EPOLLIN, EPOLL_CTL_MOD },
 598         /* old= rw, write:del, read:add, close:add */
 599         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 600         /* old= rw, write:del, read:add, close:del */
 601         { EPOLLIN, EPOLL_CTL_MOD },
 602         /* old= rw, write:del, read:add, close:xxx */
 603         { 0, 255 },
 604         /* old= rw, write:del, read:del, close:  0 */
 605         { EPOLLIN|EPOLLOUT, EPOLL_CTL_DEL },
 606         /* old= rw, write:del, read:del, close:add */
 607         { EPOLLRDHUP, EPOLL_CTL_MOD },
 608         /* old= rw, write:del, read:del, close:del */
 609         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 610         /* old= rw, write:del, read:del, close:xxx */
 611         { 0, 255 },
 612         /* old= rw, write:del, read:xxx, close:  0 */
 613         { 0, 255 },
 614         /* old= rw, write:del, read:xxx, close:add */
 615         { 0, 255 },
 616         /* old= rw, write:del, read:xxx, close:del */
 617         { 0, 255 },
 618         /* old= rw, write:del, read:xxx, close:xxx */
 619         { 0, 255 },
 620         /* old= rw, write:xxx, read:  0, close:  0 */
 621         { 0, 255 },
 622         /* old= rw, write:xxx, read:  0, close:add */
 623         { 0, 255 },
 624         /* old= rw, write:xxx, read:  0, close:del */
 625         { 0, 255 },
 626         /* old= rw, write:xxx, read:  0, close:xxx */
 627         { 0, 255 },
 628         /* old= rw, write:xxx, read:add, close:  0 */
 629         { 0, 255 },
 630         /* old= rw, write:xxx, read:add, close:add */
 631         { 0, 255 },
 632         /* old= rw, write:xxx, read:add, close:del */
 633         { 0, 255 },
 634         /* old= rw, write:xxx, read:add, close:xxx */
 635         { 0, 255 },
 636         /* old= rw, write:xxx, read:del, close:  0 */
 637         { 0, 255 },
 638         /* old= rw, write:xxx, read:del, close:add */
 639         { 0, 255 },
 640         /* old= rw, write:xxx, read:del, close:del */
 641         { 0, 255 },
 642         /* old= rw, write:xxx, read:del, close:xxx */
 643         { 0, 255 },
 644         /* old= rw, write:xxx, read:xxx, close:  0 */
 645         { 0, 255 },
 646         /* old= rw, write:xxx, read:xxx, close:add */
 647         { 0, 255 },
 648         /* old= rw, write:xxx, read:xxx, close:del */
 649         { 0, 255 },
 650         /* old= rw, write:xxx, read:xxx, close:xxx */
 651         { 0, 255 },
 652         /* old=  c, write:  0, read:  0, close:  0 */
 653         { 0, 0 },
 654         /* old=  c, write:  0, read:  0, close:add */
 655         { EPOLLRDHUP, EPOLL_CTL_MOD },
 656         /* old=  c, write:  0, read:  0, close:del */
 657         { EPOLLRDHUP, EPOLL_CTL_DEL },
 658         /* old=  c, write:  0, read:  0, close:xxx */
 659         { 0, 255 },
 660         /* old=  c, write:  0, read:add, close:  0 */
 661         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 662         /* old=  c, write:  0, read:add, close:add */
 663         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 664         /* old=  c, write:  0, read:add, close:del */
 665         { EPOLLIN, EPOLL_CTL_MOD },
 666         /* old=  c, write:  0, read:add, close:xxx */
 667         { 0, 255 },
 668         /* old=  c, write:  0, read:del, close:  0 */
 669         { EPOLLRDHUP, EPOLL_CTL_MOD },
 670         /* old=  c, write:  0, read:del, close:add */
 671         { EPOLLRDHUP, EPOLL_CTL_MOD },
 672         /* old=  c, write:  0, read:del, close:del */
 673         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_DEL },
 674         /* old=  c, write:  0, read:del, close:xxx */
 675         { 0, 255 },
 676         /* old=  c, write:  0, read:xxx, close:  0 */
 677         { 0, 255 },
 678         /* old=  c, write:  0, read:xxx, close:add */
 679         { 0, 255 },
 680         /* old=  c, write:  0, read:xxx, close:del */
 681         { 0, 255 },
 682         /* old=  c, write:  0, read:xxx, close:xxx */
 683         { 0, 255 },
 684         /* old=  c, write:add, read:  0, close:  0 */
 685         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 686         /* old=  c, write:add, read:  0, close:add */
 687         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 688         /* old=  c, write:add, read:  0, close:del */
 689         { EPOLLOUT, EPOLL_CTL_MOD },
 690         /* old=  c, write:add, read:  0, close:xxx */
 691         { 0, 255 },
 692         /* old=  c, write:add, read:add, close:  0 */
 693         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 694         /* old=  c, write:add, read:add, close:add */
 695         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 696         /* old=  c, write:add, read:add, close:del */
 697         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 698         /* old=  c, write:add, read:add, close:xxx */
 699         { 0, 255 },
 700         /* old=  c, write:add, read:del, close:  0 */
 701         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 702         /* old=  c, write:add, read:del, close:add */
 703         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 704         /* old=  c, write:add, read:del, close:del */
 705         { EPOLLOUT, EPOLL_CTL_MOD },
 706         /* old=  c, write:add, read:del, close:xxx */
 707         { 0, 255 },
 708         /* old=  c, write:add, read:xxx, close:  0 */
 709         { 0, 255 },
 710         /* old=  c, write:add, read:xxx, close:add */
 711         { 0, 255 },
 712         /* old=  c, write:add, read:xxx, close:del */
 713         { 0, 255 },
 714         /* old=  c, write:add, read:xxx, close:xxx */
 715         { 0, 255 },
 716         /* old=  c, write:del, read:  0, close:  0 */
 717         { EPOLLRDHUP, EPOLL_CTL_MOD },
 718         /* old=  c, write:del, read:  0, close:add */
 719         { EPOLLRDHUP, EPOLL_CTL_MOD },
 720         /* old=  c, write:del, read:  0, close:del */
 721         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 722         /* old=  c, write:del, read:  0, close:xxx */
 723         { 0, 255 },
 724         /* old=  c, write:del, read:add, close:  0 */
 725         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 726         /* old=  c, write:del, read:add, close:add */
 727         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 728         /* old=  c, write:del, read:add, close:del */
 729         { EPOLLIN, EPOLL_CTL_MOD },
 730         /* old=  c, write:del, read:add, close:xxx */
 731         { 0, 255 },
 732         /* old=  c, write:del, read:del, close:  0 */
 733         { EPOLLRDHUP, EPOLL_CTL_MOD },
 734         /* old=  c, write:del, read:del, close:add */
 735         { EPOLLRDHUP, EPOLL_CTL_MOD },
 736         /* old=  c, write:del, read:del, close:del */
 737         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 738         /* old=  c, write:del, read:del, close:xxx */
 739         { 0, 255 },
 740         /* old=  c, write:del, read:xxx, close:  0 */
 741         { 0, 255 },
 742         /* old=  c, write:del, read:xxx, close:add */
 743         { 0, 255 },
 744         /* old=  c, write:del, read:xxx, close:del */
 745         { 0, 255 },
 746         /* old=  c, write:del, read:xxx, close:xxx */
 747         { 0, 255 },
 748         /* old=  c, write:xxx, read:  0, close:  0 */
 749         { 0, 255 },
 750         /* old=  c, write:xxx, read:  0, close:add */
 751         { 0, 255 },
 752         /* old=  c, write:xxx, read:  0, close:del */
 753         { 0, 255 },
 754         /* old=  c, write:xxx, read:  0, close:xxx */
 755         { 0, 255 },
 756         /* old=  c, write:xxx, read:add, close:  0 */
 757         { 0, 255 },
 758         /* old=  c, write:xxx, read:add, close:add */
 759         { 0, 255 },
 760         /* old=  c, write:xxx, read:add, close:del */
 761         { 0, 255 },
 762         /* old=  c, write:xxx, read:add, close:xxx */
 763         { 0, 255 },
 764         /* old=  c, write:xxx, read:del, close:  0 */
 765         { 0, 255 },
 766         /* old=  c, write:xxx, read:del, close:add */
 767         { 0, 255 },
 768         /* old=  c, write:xxx, read:del, close:del */
 769         { 0, 255 },
 770         /* old=  c, write:xxx, read:del, close:xxx */
 771         { 0, 255 },
 772         /* old=  c, write:xxx, read:xxx, close:  0 */
 773         { 0, 255 },
 774         /* old=  c, write:xxx, read:xxx, close:add */
 775         { 0, 255 },
 776         /* old=  c, write:xxx, read:xxx, close:del */
 777         { 0, 255 },
 778         /* old=  c, write:xxx, read:xxx, close:xxx */
 779         { 0, 255 },
 780         /* old= cr, write:  0, read:  0, close:  0 */
 781         { 0, 0 },
 782         /* old= cr, write:  0, read:  0, close:add */
 783         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 784         /* old= cr, write:  0, read:  0, close:del */
 785         { EPOLLIN, EPOLL_CTL_MOD },
 786         /* old= cr, write:  0, read:  0, close:xxx */
 787         { 0, 255 },
 788         /* old= cr, write:  0, read:add, close:  0 */
 789         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 790         /* old= cr, write:  0, read:add, close:add */
 791         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 792         /* old= cr, write:  0, read:add, close:del */
 793         { EPOLLIN, EPOLL_CTL_MOD },
 794         /* old= cr, write:  0, read:add, close:xxx */
 795         { 0, 255 },
 796         /* old= cr, write:  0, read:del, close:  0 */
 797         { EPOLLRDHUP, EPOLL_CTL_MOD },
 798         /* old= cr, write:  0, read:del, close:add */
 799         { EPOLLRDHUP, EPOLL_CTL_MOD },
 800         /* old= cr, write:  0, read:del, close:del */
 801         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_DEL },
 802         /* old= cr, write:  0, read:del, close:xxx */
 803         { 0, 255 },
 804         /* old= cr, write:  0, read:xxx, close:  0 */
 805         { 0, 255 },
 806         /* old= cr, write:  0, read:xxx, close:add */
 807         { 0, 255 },
 808         /* old= cr, write:  0, read:xxx, close:del */
 809         { 0, 255 },
 810         /* old= cr, write:  0, read:xxx, close:xxx */
 811         { 0, 255 },
 812         /* old= cr, write:add, read:  0, close:  0 */
 813         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 814         /* old= cr, write:add, read:  0, close:add */
 815         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 816         /* old= cr, write:add, read:  0, close:del */
 817         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 818         /* old= cr, write:add, read:  0, close:xxx */
 819         { 0, 255 },
 820         /* old= cr, write:add, read:add, close:  0 */
 821         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 822         /* old= cr, write:add, read:add, close:add */
 823         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 824         /* old= cr, write:add, read:add, close:del */
 825         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 826         /* old= cr, write:add, read:add, close:xxx */
 827         { 0, 255 },
 828         /* old= cr, write:add, read:del, close:  0 */
 829         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 830         /* old= cr, write:add, read:del, close:add */
 831         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 832         /* old= cr, write:add, read:del, close:del */
 833         { EPOLLOUT, EPOLL_CTL_MOD },
 834         /* old= cr, write:add, read:del, close:xxx */
 835         { 0, 255 },
 836         /* old= cr, write:add, read:xxx, close:  0 */
 837         { 0, 255 },
 838         /* old= cr, write:add, read:xxx, close:add */
 839         { 0, 255 },
 840         /* old= cr, write:add, read:xxx, close:del */
 841         { 0, 255 },
 842         /* old= cr, write:add, read:xxx, close:xxx */
 843         { 0, 255 },
 844         /* old= cr, write:del, read:  0, close:  0 */
 845         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 846         /* old= cr, write:del, read:  0, close:add */
 847         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 848         /* old= cr, write:del, read:  0, close:del */
 849         { EPOLLIN, EPOLL_CTL_MOD },
 850         /* old= cr, write:del, read:  0, close:xxx */
 851         { 0, 255 },
 852         /* old= cr, write:del, read:add, close:  0 */
 853         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 854         /* old= cr, write:del, read:add, close:add */
 855         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 856         /* old= cr, write:del, read:add, close:del */
 857         { EPOLLIN, EPOLL_CTL_MOD },
 858         /* old= cr, write:del, read:add, close:xxx */
 859         { 0, 255 },
 860         /* old= cr, write:del, read:del, close:  0 */
 861         { EPOLLRDHUP, EPOLL_CTL_MOD },
 862         /* old= cr, write:del, read:del, close:add */
 863         { EPOLLRDHUP, EPOLL_CTL_MOD },
 864         /* old= cr, write:del, read:del, close:del */
 865         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 866         /* old= cr, write:del, read:del, close:xxx */
 867         { 0, 255 },
 868         /* old= cr, write:del, read:xxx, close:  0 */
 869         { 0, 255 },
 870         /* old= cr, write:del, read:xxx, close:add */
 871         { 0, 255 },
 872         /* old= cr, write:del, read:xxx, close:del */
 873         { 0, 255 },
 874         /* old= cr, write:del, read:xxx, close:xxx */
 875         { 0, 255 },
 876         /* old= cr, write:xxx, read:  0, close:  0 */
 877         { 0, 255 },
 878         /* old= cr, write:xxx, read:  0, close:add */
 879         { 0, 255 },
 880         /* old= cr, write:xxx, read:  0, close:del */
 881         { 0, 255 },
 882         /* old= cr, write:xxx, read:  0, close:xxx */
 883         { 0, 255 },
 884         /* old= cr, write:xxx, read:add, close:  0 */
 885         { 0, 255 },
 886         /* old= cr, write:xxx, read:add, close:add */
 887         { 0, 255 },
 888         /* old= cr, write:xxx, read:add, close:del */
 889         { 0, 255 },
 890         /* old= cr, write:xxx, read:add, close:xxx */
 891         { 0, 255 },
 892         /* old= cr, write:xxx, read:del, close:  0 */
 893         { 0, 255 },
 894         /* old= cr, write:xxx, read:del, close:add */
 895         { 0, 255 },
 896         /* old= cr, write:xxx, read:del, close:del */
 897         { 0, 255 },
 898         /* old= cr, write:xxx, read:del, close:xxx */
 899         { 0, 255 },
 900         /* old= cr, write:xxx, read:xxx, close:  0 */
 901         { 0, 255 },
 902         /* old= cr, write:xxx, read:xxx, close:add */
 903         { 0, 255 },
 904         /* old= cr, write:xxx, read:xxx, close:del */
 905         { 0, 255 },
 906         /* old= cr, write:xxx, read:xxx, close:xxx */
 907         { 0, 255 },
 908         /* old= cw, write:  0, read:  0, close:  0 */
 909         { 0, 0 },
 910         /* old= cw, write:  0, read:  0, close:add */
 911         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 912         /* old= cw, write:  0, read:  0, close:del */
 913         { EPOLLOUT, EPOLL_CTL_MOD },
 914         /* old= cw, write:  0, read:  0, close:xxx */
 915         { 0, 255 },
 916         /* old= cw, write:  0, read:add, close:  0 */
 917         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 918         /* old= cw, write:  0, read:add, close:add */
 919         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 920         /* old= cw, write:  0, read:add, close:del */
 921         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 922         /* old= cw, write:  0, read:add, close:xxx */
 923         { 0, 255 },
 924         /* old= cw, write:  0, read:del, close:  0 */
 925         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 926         /* old= cw, write:  0, read:del, close:add */
 927         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 928         /* old= cw, write:  0, read:del, close:del */
 929         { EPOLLOUT, EPOLL_CTL_MOD },
 930         /* old= cw, write:  0, read:del, close:xxx */
 931         { 0, 255 },
 932         /* old= cw, write:  0, read:xxx, close:  0 */
 933         { 0, 255 },
 934         /* old= cw, write:  0, read:xxx, close:add */
 935         { 0, 255 },
 936         /* old= cw, write:  0, read:xxx, close:del */
 937         { 0, 255 },
 938         /* old= cw, write:  0, read:xxx, close:xxx */
 939         { 0, 255 },
 940         /* old= cw, write:add, read:  0, close:  0 */
 941         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 942         /* old= cw, write:add, read:  0, close:add */
 943         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 944         /* old= cw, write:add, read:  0, close:del */
 945         { EPOLLOUT, EPOLL_CTL_MOD },
 946         /* old= cw, write:add, read:  0, close:xxx */
 947         { 0, 255 },
 948         /* old= cw, write:add, read:add, close:  0 */
 949         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 950         /* old= cw, write:add, read:add, close:add */
 951         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 952         /* old= cw, write:add, read:add, close:del */
 953         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
 954         /* old= cw, write:add, read:add, close:xxx */
 955         { 0, 255 },
 956         /* old= cw, write:add, read:del, close:  0 */
 957         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 958         /* old= cw, write:add, read:del, close:add */
 959         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
 960         /* old= cw, write:add, read:del, close:del */
 961         { EPOLLOUT, EPOLL_CTL_MOD },
 962         /* old= cw, write:add, read:del, close:xxx */
 963         { 0, 255 },
 964         /* old= cw, write:add, read:xxx, close:  0 */
 965         { 0, 255 },
 966         /* old= cw, write:add, read:xxx, close:add */
 967         { 0, 255 },
 968         /* old= cw, write:add, read:xxx, close:del */
 969         { 0, 255 },
 970         /* old= cw, write:add, read:xxx, close:xxx */
 971         { 0, 255 },
 972         /* old= cw, write:del, read:  0, close:  0 */
 973         { EPOLLRDHUP, EPOLL_CTL_MOD },
 974         /* old= cw, write:del, read:  0, close:add */
 975         { EPOLLRDHUP, EPOLL_CTL_MOD },
 976         /* old= cw, write:del, read:  0, close:del */
 977         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 978         /* old= cw, write:del, read:  0, close:xxx */
 979         { 0, 255 },
 980         /* old= cw, write:del, read:add, close:  0 */
 981         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 982         /* old= cw, write:del, read:add, close:add */
 983         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
 984         /* old= cw, write:del, read:add, close:del */
 985         { EPOLLIN, EPOLL_CTL_MOD },
 986         /* old= cw, write:del, read:add, close:xxx */
 987         { 0, 255 },
 988         /* old= cw, write:del, read:del, close:  0 */
 989         { EPOLLRDHUP, EPOLL_CTL_MOD },
 990         /* old= cw, write:del, read:del, close:add */
 991         { EPOLLRDHUP, EPOLL_CTL_MOD },
 992         /* old= cw, write:del, read:del, close:del */
 993         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
 994         /* old= cw, write:del, read:del, close:xxx */
 995         { 0, 255 },
 996         /* old= cw, write:del, read:xxx, close:  0 */
 997         { 0, 255 },
 998         /* old= cw, write:del, read:xxx, close:add */
 999         { 0, 255 },
1000         /* old= cw, write:del, read:xxx, close:del */
1001         { 0, 255 },
1002         /* old= cw, write:del, read:xxx, close:xxx */
1003         { 0, 255 },
1004         /* old= cw, write:xxx, read:  0, close:  0 */
1005         { 0, 255 },
1006         /* old= cw, write:xxx, read:  0, close:add */
1007         { 0, 255 },
1008         /* old= cw, write:xxx, read:  0, close:del */
1009         { 0, 255 },
1010         /* old= cw, write:xxx, read:  0, close:xxx */
1011         { 0, 255 },
1012         /* old= cw, write:xxx, read:add, close:  0 */
1013         { 0, 255 },
1014         /* old= cw, write:xxx, read:add, close:add */
1015         { 0, 255 },
1016         /* old= cw, write:xxx, read:add, close:del */
1017         { 0, 255 },
1018         /* old= cw, write:xxx, read:add, close:xxx */
1019         { 0, 255 },
1020         /* old= cw, write:xxx, read:del, close:  0 */
1021         { 0, 255 },
1022         /* old= cw, write:xxx, read:del, close:add */
1023         { 0, 255 },
1024         /* old= cw, write:xxx, read:del, close:del */
1025         { 0, 255 },
1026         /* old= cw, write:xxx, read:del, close:xxx */
1027         { 0, 255 },
1028         /* old= cw, write:xxx, read:xxx, close:  0 */
1029         { 0, 255 },
1030         /* old= cw, write:xxx, read:xxx, close:add */
1031         { 0, 255 },
1032         /* old= cw, write:xxx, read:xxx, close:del */
1033         { 0, 255 },
1034         /* old= cw, write:xxx, read:xxx, close:xxx */
1035         { 0, 255 },
1036         /* old=crw, write:  0, read:  0, close:  0 */
1037         { 0, 0 },
1038         /* old=crw, write:  0, read:  0, close:add */
1039         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1040         /* old=crw, write:  0, read:  0, close:del */
1041         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
1042         /* old=crw, write:  0, read:  0, close:xxx */
1043         { 0, 255 },
1044         /* old=crw, write:  0, read:add, close:  0 */
1045         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1046         /* old=crw, write:  0, read:add, close:add */
1047         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1048         /* old=crw, write:  0, read:add, close:del */
1049         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
1050         /* old=crw, write:  0, read:add, close:xxx */
1051         { 0, 255 },
1052         /* old=crw, write:  0, read:del, close:  0 */
1053         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1054         /* old=crw, write:  0, read:del, close:add */
1055         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1056         /* old=crw, write:  0, read:del, close:del */
1057         { EPOLLOUT, EPOLL_CTL_MOD },
1058         /* old=crw, write:  0, read:del, close:xxx */
1059         { 0, 255 },
1060         /* old=crw, write:  0, read:xxx, close:  0 */
1061         { 0, 255 },
1062         /* old=crw, write:  0, read:xxx, close:add */
1063         { 0, 255 },
1064         /* old=crw, write:  0, read:xxx, close:del */
1065         { 0, 255 },
1066         /* old=crw, write:  0, read:xxx, close:xxx */
1067         { 0, 255 },
1068         /* old=crw, write:add, read:  0, close:  0 */
1069         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1070         /* old=crw, write:add, read:  0, close:add */
1071         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1072         /* old=crw, write:add, read:  0, close:del */
1073         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
1074         /* old=crw, write:add, read:  0, close:xxx */
1075         { 0, 255 },
1076         /* old=crw, write:add, read:add, close:  0 */
1077         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1078         /* old=crw, write:add, read:add, close:add */
1079         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1080         /* old=crw, write:add, read:add, close:del */
1081         { EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
1082         /* old=crw, write:add, read:add, close:xxx */
1083         { 0, 255 },
1084         /* old=crw, write:add, read:del, close:  0 */
1085         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1086         /* old=crw, write:add, read:del, close:add */
1087         { EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
1088         /* old=crw, write:add, read:del, close:del */
1089         { EPOLLOUT, EPOLL_CTL_MOD },
1090         /* old=crw, write:add, read:del, close:xxx */
1091         { 0, 255 },
1092         /* old=crw, write:add, read:xxx, close:  0 */
1093         { 0, 255 },
1094         /* old=crw, write:add, read:xxx, close:add */
1095         { 0, 255 },
1096         /* old=crw, write:add, read:xxx, close:del */
1097         { 0, 255 },
1098         /* old=crw, write:add, read:xxx, close:xxx */
1099         { 0, 255 },
1100         /* old=crw, write:del, read:  0, close:  0 */
1101         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
1102         /* old=crw, write:del, read:  0, close:add */
1103         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
1104         /* old=crw, write:del, read:  0, close:del */
1105         { EPOLLIN, EPOLL_CTL_MOD },
1106         /* old=crw, write:del, read:  0, close:xxx */
1107         { 0, 255 },
1108         /* old=crw, write:del, read:add, close:  0 */
1109         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
1110         /* old=crw, write:del, read:add, close:add */
1111         { EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
1112         /* old=crw, write:del, read:add, close:del */
1113         { EPOLLIN, EPOLL_CTL_MOD },
1114         /* old=crw, write:del, read:add, close:xxx */
1115         { 0, 255 },
1116         /* old=crw, write:del, read:del, close:  0 */
1117         { EPOLLRDHUP, EPOLL_CTL_MOD },
1118         /* old=crw, write:del, read:del, close:add */
1119         { EPOLLRDHUP, EPOLL_CTL_MOD },
1120         /* old=crw, write:del, read:del, close:del */
1121         { EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
1122         /* old=crw, write:del, read:del, close:xxx */
1123         { 0, 255 },
1124         /* old=crw, write:del, read:xxx, close:  0 */
1125         { 0, 255 },
1126         /* old=crw, write:del, read:xxx, close:add */
1127         { 0, 255 },
1128         /* old=crw, write:del, read:xxx, close:del */
1129         { 0, 255 },
1130         /* old=crw, write:del, read:xxx, close:xxx */
1131         { 0, 255 },
1132         /* old=crw, write:xxx, read:  0, close:  0 */
1133         { 0, 255 },
1134         /* old=crw, write:xxx, read:  0, close:add */
1135         { 0, 255 },
1136         /* old=crw, write:xxx, read:  0, close:del */
1137         { 0, 255 },
1138         /* old=crw, write:xxx, read:  0, close:xxx */
1139         { 0, 255 },
1140         /* old=crw, write:xxx, read:add, close:  0 */
1141         { 0, 255 },
1142         /* old=crw, write:xxx, read:add, close:add */
1143         { 0, 255 },
1144         /* old=crw, write:xxx, read:add, close:del */
1145         { 0, 255 },
1146         /* old=crw, write:xxx, read:add, close:xxx */
1147         { 0, 255 },
1148         /* old=crw, write:xxx, read:del, close:  0 */
1149         { 0, 255 },
1150         /* old=crw, write:xxx, read:del, close:add */
1151         { 0, 255 },
1152         /* old=crw, write:xxx, read:del, close:del */
1153         { 0, 255 },
1154         /* old=crw, write:xxx, read:del, close:xxx */
1155         { 0, 255 },
1156         /* old=crw, write:xxx, read:xxx, close:  0 */
1157         { 0, 255 },
1158         /* old=crw, write:xxx, read:xxx, close:add */
1159         { 0, 255 },
1160         /* old=crw, write:xxx, read:xxx, close:del */
1161         { 0, 255 },
1162         /* old=crw, write:xxx, read:xxx, close:xxx */
1163         { 0, 255 },
1164 };
1165
1166 #endif