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epolltable-internal.h revision 1.6
      1 /*	$NetBSD: epolltable-internal.h,v 1.6 2024/08/18 20:47:21 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000-2007 Niels Provos <provos (at) citi.umich.edu>
      5  * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 #ifndef EPOLLTABLE_INTERNAL_H_INCLUDED_
     30 #define EPOLLTABLE_INTERNAL_H_INCLUDED_
     31 
     32 /*
     33   Here are the values we're masking off to decide what operations to do.
     34   Note that since EV_READ|EV_WRITE.
     35 
     36   Note also that this table is a little sparse, since ADD+DEL is
     37   nonsensical ("xxx" in the list below.)
     38 
     39   Note also that we are shifting old_events by only 5 bits, since
     40   EV_READ is 2 and EV_WRITE is 4.
     41 
     42   The table was auto-generated with a python script, according to this
     43   pseudocode:[*0]
     44 
     45       If either the read or the write change is add+del:
     46 	 This is impossible; Set op==-1, events=0.
     47       Else, if either the read or the write change is add:
     48 	 Set events to 0.
     49 	 If the read change is add, or
     50 	    (the read change is not del, and ev_read is in old_events):
     51 	       Add EPOLLIN to events.
     52 	 If the write change is add, or
     53 	    (the write change is not del, and ev_write is in old_events):
     54 	       Add EPOLLOUT to events.
     55 
     56 	 If old_events is set:
     57 	       Set op to EPOLL_CTL_MOD [*1,*2]
     58 	Else:
     59 	       Set op to EPOLL_CTL_ADD [*3]
     60 
     61       Else, if the read or the write change is del:
     62 	 Set op to EPOLL_CTL_DEL.
     63 	 If the read change is del:
     64 	     If the write change is del:
     65 		 Set events to EPOLLIN|EPOLLOUT
     66 	     Else if ev_write is in old_events:
     67 		 Set events to EPOLLOUT
     68 		Set op to EPOLL_CTL_MOD
     69 	     Else
     70 		 Set events to EPOLLIN
     71 	 Else:
     72 	     {The write change is del.}
     73 	    If ev_read is in old_events:
     74 		 Set events to EPOLLIN
     75 		Set op to EPOLL_CTL_MOD
     76 	    Else:
     77 		Set the events to EPOLLOUT
     78 
     79       Else:
     80 	   There is no read or write change; set op to 0 and events to 0.
     81 
     82       The logic is a little tricky, since we had no events set on the fd before,
     83       we need to set op="ADD" and set events=the events we want to add.	 If we
     84       had any events set on the fd before, and we want any events to remain on
     85       the fd, we need to say op="MOD" and set events=the events we want to
     86       remain.  But if we want to delete the last event, we say op="DEL" and
     87       set events=(any non-null pointer).
     88 
     89   [*0] Actually, the Python script has gotten a bit more complicated, to
     90        support EPOLLRDHUP.
     91 
     92   [*1] This MOD is only a guess.  MOD might fail with ENOENT if the file was
     93        closed and a new file was opened with the same fd.  If so, we'll retry
     94        with ADD.
     95 
     96   [*2] We can't replace this with a no-op even if old_events is the same as
     97        the new events: if the file was closed and reopened, we need to retry
     98        with an ADD.  (We do a MOD in this case since "no change" is more
     99        common than "close and reopen", so we'll usually wind up doing 1
    100        syscalls instead of 2.)
    101 
    102   [*3] This ADD is only a guess.  There is a fun Linux kernel issue where if
    103        you have two fds for the same file (via dup) and you ADD one to an
    104        epfd, then close it, then re-create it with the same fd (via dup2 or an
    105        unlucky dup), then try to ADD it again, you'll get an EEXIST, since the
    106        struct epitem is not actually removed from the struct eventpoll until
    107        the file itself is closed.
    108 
    109   EV_CHANGE_ADD==1
    110   EV_CHANGE_DEL==2
    111   EV_READ      ==2
    112   EV_WRITE     ==4
    113   EV_CLOSED    ==0x80
    114 
    115   Bit 0: close change is add
    116   Bit 1: close change is del
    117   Bit 2: read change is add
    118   Bit 3: read change is del
    119   Bit 4: write change is add
    120   Bit 5: write change is del
    121   Bit 6: old events had EV_READ
    122   Bit 7: old events had EV_WRITE
    123   Bit 8: old events had EV_CLOSED
    124 */
    125 
    126 #define EPOLL_OP_TABLE_INDEX(c) \
    127 	(   (((c)->close_change&(EV_CHANGE_ADD|EV_CHANGE_DEL))) |		\
    128 	    (((c)->read_change&(EV_CHANGE_ADD|EV_CHANGE_DEL)) << 2) |	\
    129 	    (((c)->write_change&(EV_CHANGE_ADD|EV_CHANGE_DEL)) << 4) |	\
    130 	    (((c)->old_events&(EV_READ|EV_WRITE)) << 5) |		\
    131 	    (((c)->old_events&(EV_CLOSED)) << 1)				\
    132 	    )
    133 
    134 #if EV_READ != 2 || EV_WRITE != 4 || EV_CLOSED != 0x80 || EV_CHANGE_ADD != 1 || EV_CHANGE_DEL != 2
    135 #error "Libevent's internals changed!  Regenerate the op_table in epolltable-internal.h"
    136 #endif
    137 
    138 static const struct operation {
    139 	int events;
    140 	int op;
    141 } epoll_op_table[] = {
    142 	/* old=  0, write:  0, read:  0, close:  0 */
    143 	{ 0, 0 },
    144 	/* old=  0, write:  0, read:  0, close:add */
    145 	{ EPOLLRDHUP, EPOLL_CTL_ADD },
    146 	/* old=  0, write:  0, read:  0, close:del */
    147 	{ EPOLLRDHUP, EPOLL_CTL_DEL },
    148 	/* old=  0, write:  0, read:  0, close:xxx */
    149 	{ 0, 255 },
    150 	/* old=  0, write:  0, read:add, close:  0 */
    151 	{ EPOLLIN, EPOLL_CTL_ADD },
    152 	/* old=  0, write:  0, read:add, close:add */
    153 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_ADD },
    154 	/* old=  0, write:  0, read:add, close:del */
    155 	{ EPOLLIN, EPOLL_CTL_ADD },
    156 	/* old=  0, write:  0, read:add, close:xxx */
    157 	{ 0, 255 },
    158 	/* old=  0, write:  0, read:del, close:  0 */
    159 	{ EPOLLIN, EPOLL_CTL_DEL },
    160 	/* old=  0, write:  0, read:del, close:add */
    161 	{ EPOLLRDHUP, EPOLL_CTL_ADD },
    162 	/* old=  0, write:  0, read:del, close:del */
    163 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_DEL },
    164 	/* old=  0, write:  0, read:del, close:xxx */
    165 	{ 0, 255 },
    166 	/* old=  0, write:  0, read:xxx, close:  0 */
    167 	{ 0, 255 },
    168 	/* old=  0, write:  0, read:xxx, close:add */
    169 	{ 0, 255 },
    170 	/* old=  0, write:  0, read:xxx, close:del */
    171 	{ 0, 255 },
    172 	/* old=  0, write:  0, read:xxx, close:xxx */
    173 	{ 0, 255 },
    174 	/* old=  0, write:add, read:  0, close:  0 */
    175 	{ EPOLLOUT, EPOLL_CTL_ADD },
    176 	/* old=  0, write:add, read:  0, close:add */
    177 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_ADD },
    178 	/* old=  0, write:add, read:  0, close:del */
    179 	{ EPOLLOUT, EPOLL_CTL_ADD },
    180 	/* old=  0, write:add, read:  0, close:xxx */
    181 	{ 0, 255 },
    182 	/* old=  0, write:add, read:add, close:  0 */
    183 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_ADD },
    184 	/* old=  0, write:add, read:add, close:add */
    185 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_ADD },
    186 	/* old=  0, write:add, read:add, close:del */
    187 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_ADD },
    188 	/* old=  0, write:add, read:add, close:xxx */
    189 	{ 0, 255 },
    190 	/* old=  0, write:add, read:del, close:  0 */
    191 	{ EPOLLOUT, EPOLL_CTL_ADD },
    192 	/* old=  0, write:add, read:del, close:add */
    193 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_ADD },
    194 	/* old=  0, write:add, read:del, close:del */
    195 	{ EPOLLOUT, EPOLL_CTL_ADD },
    196 	/* old=  0, write:add, read:del, close:xxx */
    197 	{ 0, 255 },
    198 	/* old=  0, write:add, read:xxx, close:  0 */
    199 	{ 0, 255 },
    200 	/* old=  0, write:add, read:xxx, close:add */
    201 	{ 0, 255 },
    202 	/* old=  0, write:add, read:xxx, close:del */
    203 	{ 0, 255 },
    204 	/* old=  0, write:add, read:xxx, close:xxx */
    205 	{ 0, 255 },
    206 	/* old=  0, write:del, read:  0, close:  0 */
    207 	{ EPOLLOUT, EPOLL_CTL_DEL },
    208 	/* old=  0, write:del, read:  0, close:add */
    209 	{ EPOLLRDHUP, EPOLL_CTL_ADD },
    210 	/* old=  0, write:del, read:  0, close:del */
    211 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    212 	/* old=  0, write:del, read:  0, close:xxx */
    213 	{ 0, 255 },
    214 	/* old=  0, write:del, read:add, close:  0 */
    215 	{ EPOLLIN, EPOLL_CTL_ADD },
    216 	/* old=  0, write:del, read:add, close:add */
    217 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_ADD },
    218 	/* old=  0, write:del, read:add, close:del */
    219 	{ EPOLLIN, EPOLL_CTL_ADD },
    220 	/* old=  0, write:del, read:add, close:xxx */
    221 	{ 0, 255 },
    222 	/* old=  0, write:del, read:del, close:  0 */
    223 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_DEL },
    224 	/* old=  0, write:del, read:del, close:add */
    225 	{ EPOLLRDHUP, EPOLL_CTL_ADD },
    226 	/* old=  0, write:del, read:del, close:del */
    227 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    228 	/* old=  0, write:del, read:del, close:xxx */
    229 	{ 0, 255 },
    230 	/* old=  0, write:del, read:xxx, close:  0 */
    231 	{ 0, 255 },
    232 	/* old=  0, write:del, read:xxx, close:add */
    233 	{ 0, 255 },
    234 	/* old=  0, write:del, read:xxx, close:del */
    235 	{ 0, 255 },
    236 	/* old=  0, write:del, read:xxx, close:xxx */
    237 	{ 0, 255 },
    238 	/* old=  0, write:xxx, read:  0, close:  0 */
    239 	{ 0, 255 },
    240 	/* old=  0, write:xxx, read:  0, close:add */
    241 	{ 0, 255 },
    242 	/* old=  0, write:xxx, read:  0, close:del */
    243 	{ 0, 255 },
    244 	/* old=  0, write:xxx, read:  0, close:xxx */
    245 	{ 0, 255 },
    246 	/* old=  0, write:xxx, read:add, close:  0 */
    247 	{ 0, 255 },
    248 	/* old=  0, write:xxx, read:add, close:add */
    249 	{ 0, 255 },
    250 	/* old=  0, write:xxx, read:add, close:del */
    251 	{ 0, 255 },
    252 	/* old=  0, write:xxx, read:add, close:xxx */
    253 	{ 0, 255 },
    254 	/* old=  0, write:xxx, read:del, close:  0 */
    255 	{ 0, 255 },
    256 	/* old=  0, write:xxx, read:del, close:add */
    257 	{ 0, 255 },
    258 	/* old=  0, write:xxx, read:del, close:del */
    259 	{ 0, 255 },
    260 	/* old=  0, write:xxx, read:del, close:xxx */
    261 	{ 0, 255 },
    262 	/* old=  0, write:xxx, read:xxx, close:  0 */
    263 	{ 0, 255 },
    264 	/* old=  0, write:xxx, read:xxx, close:add */
    265 	{ 0, 255 },
    266 	/* old=  0, write:xxx, read:xxx, close:del */
    267 	{ 0, 255 },
    268 	/* old=  0, write:xxx, read:xxx, close:xxx */
    269 	{ 0, 255 },
    270 	/* old=  r, write:  0, read:  0, close:  0 */
    271 	{ 0, 0 },
    272 	/* old=  r, write:  0, read:  0, close:add */
    273 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    274 	/* old=  r, write:  0, read:  0, close:del */
    275 	{ EPOLLIN, EPOLL_CTL_MOD },
    276 	/* old=  r, write:  0, read:  0, close:xxx */
    277 	{ 0, 255 },
    278 	/* old=  r, write:  0, read:add, close:  0 */
    279 	{ EPOLLIN, EPOLL_CTL_MOD },
    280 	/* old=  r, write:  0, read:add, close:add */
    281 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    282 	/* old=  r, write:  0, read:add, close:del */
    283 	{ EPOLLIN, EPOLL_CTL_MOD },
    284 	/* old=  r, write:  0, read:add, close:xxx */
    285 	{ 0, 255 },
    286 	/* old=  r, write:  0, read:del, close:  0 */
    287 	{ EPOLLIN, EPOLL_CTL_DEL },
    288 	/* old=  r, write:  0, read:del, close:add */
    289 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    290 	/* old=  r, write:  0, read:del, close:del */
    291 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_DEL },
    292 	/* old=  r, write:  0, read:del, close:xxx */
    293 	{ 0, 255 },
    294 	/* old=  r, write:  0, read:xxx, close:  0 */
    295 	{ 0, 255 },
    296 	/* old=  r, write:  0, read:xxx, close:add */
    297 	{ 0, 255 },
    298 	/* old=  r, write:  0, read:xxx, close:del */
    299 	{ 0, 255 },
    300 	/* old=  r, write:  0, read:xxx, close:xxx */
    301 	{ 0, 255 },
    302 	/* old=  r, write:add, read:  0, close:  0 */
    303 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    304 	/* old=  r, write:add, read:  0, close:add */
    305 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    306 	/* old=  r, write:add, read:  0, close:del */
    307 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    308 	/* old=  r, write:add, read:  0, close:xxx */
    309 	{ 0, 255 },
    310 	/* old=  r, write:add, read:add, close:  0 */
    311 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    312 	/* old=  r, write:add, read:add, close:add */
    313 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    314 	/* old=  r, write:add, read:add, close:del */
    315 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    316 	/* old=  r, write:add, read:add, close:xxx */
    317 	{ 0, 255 },
    318 	/* old=  r, write:add, read:del, close:  0 */
    319 	{ EPOLLOUT, EPOLL_CTL_MOD },
    320 	/* old=  r, write:add, read:del, close:add */
    321 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    322 	/* old=  r, write:add, read:del, close:del */
    323 	{ EPOLLOUT, EPOLL_CTL_MOD },
    324 	/* old=  r, write:add, read:del, close:xxx */
    325 	{ 0, 255 },
    326 	/* old=  r, write:add, read:xxx, close:  0 */
    327 	{ 0, 255 },
    328 	/* old=  r, write:add, read:xxx, close:add */
    329 	{ 0, 255 },
    330 	/* old=  r, write:add, read:xxx, close:del */
    331 	{ 0, 255 },
    332 	/* old=  r, write:add, read:xxx, close:xxx */
    333 	{ 0, 255 },
    334 	/* old=  r, write:del, read:  0, close:  0 */
    335 	{ EPOLLIN, EPOLL_CTL_MOD },
    336 	/* old=  r, write:del, read:  0, close:add */
    337 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    338 	/* old=  r, write:del, read:  0, close:del */
    339 	{ EPOLLIN, EPOLL_CTL_MOD },
    340 	/* old=  r, write:del, read:  0, close:xxx */
    341 	{ 0, 255 },
    342 	/* old=  r, write:del, read:add, close:  0 */
    343 	{ EPOLLIN, EPOLL_CTL_MOD },
    344 	/* old=  r, write:del, read:add, close:add */
    345 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    346 	/* old=  r, write:del, read:add, close:del */
    347 	{ EPOLLIN, EPOLL_CTL_MOD },
    348 	/* old=  r, write:del, read:add, close:xxx */
    349 	{ 0, 255 },
    350 	/* old=  r, write:del, read:del, close:  0 */
    351 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_DEL },
    352 	/* old=  r, write:del, read:del, close:add */
    353 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    354 	/* old=  r, write:del, read:del, close:del */
    355 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    356 	/* old=  r, write:del, read:del, close:xxx */
    357 	{ 0, 255 },
    358 	/* old=  r, write:del, read:xxx, close:  0 */
    359 	{ 0, 255 },
    360 	/* old=  r, write:del, read:xxx, close:add */
    361 	{ 0, 255 },
    362 	/* old=  r, write:del, read:xxx, close:del */
    363 	{ 0, 255 },
    364 	/* old=  r, write:del, read:xxx, close:xxx */
    365 	{ 0, 255 },
    366 	/* old=  r, write:xxx, read:  0, close:  0 */
    367 	{ 0, 255 },
    368 	/* old=  r, write:xxx, read:  0, close:add */
    369 	{ 0, 255 },
    370 	/* old=  r, write:xxx, read:  0, close:del */
    371 	{ 0, 255 },
    372 	/* old=  r, write:xxx, read:  0, close:xxx */
    373 	{ 0, 255 },
    374 	/* old=  r, write:xxx, read:add, close:  0 */
    375 	{ 0, 255 },
    376 	/* old=  r, write:xxx, read:add, close:add */
    377 	{ 0, 255 },
    378 	/* old=  r, write:xxx, read:add, close:del */
    379 	{ 0, 255 },
    380 	/* old=  r, write:xxx, read:add, close:xxx */
    381 	{ 0, 255 },
    382 	/* old=  r, write:xxx, read:del, close:  0 */
    383 	{ 0, 255 },
    384 	/* old=  r, write:xxx, read:del, close:add */
    385 	{ 0, 255 },
    386 	/* old=  r, write:xxx, read:del, close:del */
    387 	{ 0, 255 },
    388 	/* old=  r, write:xxx, read:del, close:xxx */
    389 	{ 0, 255 },
    390 	/* old=  r, write:xxx, read:xxx, close:  0 */
    391 	{ 0, 255 },
    392 	/* old=  r, write:xxx, read:xxx, close:add */
    393 	{ 0, 255 },
    394 	/* old=  r, write:xxx, read:xxx, close:del */
    395 	{ 0, 255 },
    396 	/* old=  r, write:xxx, read:xxx, close:xxx */
    397 	{ 0, 255 },
    398 	/* old=  w, write:  0, read:  0, close:  0 */
    399 	{ 0, 0 },
    400 	/* old=  w, write:  0, read:  0, close:add */
    401 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    402 	/* old=  w, write:  0, read:  0, close:del */
    403 	{ EPOLLOUT, EPOLL_CTL_MOD },
    404 	/* old=  w, write:  0, read:  0, close:xxx */
    405 	{ 0, 255 },
    406 	/* old=  w, write:  0, read:add, close:  0 */
    407 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    408 	/* old=  w, write:  0, read:add, close:add */
    409 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    410 	/* old=  w, write:  0, read:add, close:del */
    411 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    412 	/* old=  w, write:  0, read:add, close:xxx */
    413 	{ 0, 255 },
    414 	/* old=  w, write:  0, read:del, close:  0 */
    415 	{ EPOLLOUT, EPOLL_CTL_MOD },
    416 	/* old=  w, write:  0, read:del, close:add */
    417 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    418 	/* old=  w, write:  0, read:del, close:del */
    419 	{ EPOLLOUT, EPOLL_CTL_MOD },
    420 	/* old=  w, write:  0, read:del, close:xxx */
    421 	{ 0, 255 },
    422 	/* old=  w, write:  0, read:xxx, close:  0 */
    423 	{ 0, 255 },
    424 	/* old=  w, write:  0, read:xxx, close:add */
    425 	{ 0, 255 },
    426 	/* old=  w, write:  0, read:xxx, close:del */
    427 	{ 0, 255 },
    428 	/* old=  w, write:  0, read:xxx, close:xxx */
    429 	{ 0, 255 },
    430 	/* old=  w, write:add, read:  0, close:  0 */
    431 	{ EPOLLOUT, EPOLL_CTL_MOD },
    432 	/* old=  w, write:add, read:  0, close:add */
    433 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    434 	/* old=  w, write:add, read:  0, close:del */
    435 	{ EPOLLOUT, EPOLL_CTL_MOD },
    436 	/* old=  w, write:add, read:  0, close:xxx */
    437 	{ 0, 255 },
    438 	/* old=  w, write:add, read:add, close:  0 */
    439 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    440 	/* old=  w, write:add, read:add, close:add */
    441 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    442 	/* old=  w, write:add, read:add, close:del */
    443 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    444 	/* old=  w, write:add, read:add, close:xxx */
    445 	{ 0, 255 },
    446 	/* old=  w, write:add, read:del, close:  0 */
    447 	{ EPOLLOUT, EPOLL_CTL_MOD },
    448 	/* old=  w, write:add, read:del, close:add */
    449 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    450 	/* old=  w, write:add, read:del, close:del */
    451 	{ EPOLLOUT, EPOLL_CTL_MOD },
    452 	/* old=  w, write:add, read:del, close:xxx */
    453 	{ 0, 255 },
    454 	/* old=  w, write:add, read:xxx, close:  0 */
    455 	{ 0, 255 },
    456 	/* old=  w, write:add, read:xxx, close:add */
    457 	{ 0, 255 },
    458 	/* old=  w, write:add, read:xxx, close:del */
    459 	{ 0, 255 },
    460 	/* old=  w, write:add, read:xxx, close:xxx */
    461 	{ 0, 255 },
    462 	/* old=  w, write:del, read:  0, close:  0 */
    463 	{ EPOLLOUT, EPOLL_CTL_DEL },
    464 	/* old=  w, write:del, read:  0, close:add */
    465 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    466 	/* old=  w, write:del, read:  0, close:del */
    467 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    468 	/* old=  w, write:del, read:  0, close:xxx */
    469 	{ 0, 255 },
    470 	/* old=  w, write:del, read:add, close:  0 */
    471 	{ EPOLLIN, EPOLL_CTL_MOD },
    472 	/* old=  w, write:del, read:add, close:add */
    473 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    474 	/* old=  w, write:del, read:add, close:del */
    475 	{ EPOLLIN, EPOLL_CTL_MOD },
    476 	/* old=  w, write:del, read:add, close:xxx */
    477 	{ 0, 255 },
    478 	/* old=  w, write:del, read:del, close:  0 */
    479 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_DEL },
    480 	/* old=  w, write:del, read:del, close:add */
    481 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    482 	/* old=  w, write:del, read:del, close:del */
    483 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    484 	/* old=  w, write:del, read:del, close:xxx */
    485 	{ 0, 255 },
    486 	/* old=  w, write:del, read:xxx, close:  0 */
    487 	{ 0, 255 },
    488 	/* old=  w, write:del, read:xxx, close:add */
    489 	{ 0, 255 },
    490 	/* old=  w, write:del, read:xxx, close:del */
    491 	{ 0, 255 },
    492 	/* old=  w, write:del, read:xxx, close:xxx */
    493 	{ 0, 255 },
    494 	/* old=  w, write:xxx, read:  0, close:  0 */
    495 	{ 0, 255 },
    496 	/* old=  w, write:xxx, read:  0, close:add */
    497 	{ 0, 255 },
    498 	/* old=  w, write:xxx, read:  0, close:del */
    499 	{ 0, 255 },
    500 	/* old=  w, write:xxx, read:  0, close:xxx */
    501 	{ 0, 255 },
    502 	/* old=  w, write:xxx, read:add, close:  0 */
    503 	{ 0, 255 },
    504 	/* old=  w, write:xxx, read:add, close:add */
    505 	{ 0, 255 },
    506 	/* old=  w, write:xxx, read:add, close:del */
    507 	{ 0, 255 },
    508 	/* old=  w, write:xxx, read:add, close:xxx */
    509 	{ 0, 255 },
    510 	/* old=  w, write:xxx, read:del, close:  0 */
    511 	{ 0, 255 },
    512 	/* old=  w, write:xxx, read:del, close:add */
    513 	{ 0, 255 },
    514 	/* old=  w, write:xxx, read:del, close:del */
    515 	{ 0, 255 },
    516 	/* old=  w, write:xxx, read:del, close:xxx */
    517 	{ 0, 255 },
    518 	/* old=  w, write:xxx, read:xxx, close:  0 */
    519 	{ 0, 255 },
    520 	/* old=  w, write:xxx, read:xxx, close:add */
    521 	{ 0, 255 },
    522 	/* old=  w, write:xxx, read:xxx, close:del */
    523 	{ 0, 255 },
    524 	/* old=  w, write:xxx, read:xxx, close:xxx */
    525 	{ 0, 255 },
    526 	/* old= rw, write:  0, read:  0, close:  0 */
    527 	{ 0, 0 },
    528 	/* old= rw, write:  0, read:  0, close:add */
    529 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    530 	/* old= rw, write:  0, read:  0, close:del */
    531 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    532 	/* old= rw, write:  0, read:  0, close:xxx */
    533 	{ 0, 255 },
    534 	/* old= rw, write:  0, read:add, close:  0 */
    535 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    536 	/* old= rw, write:  0, read:add, close:add */
    537 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    538 	/* old= rw, write:  0, read:add, close:del */
    539 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    540 	/* old= rw, write:  0, read:add, close:xxx */
    541 	{ 0, 255 },
    542 	/* old= rw, write:  0, read:del, close:  0 */
    543 	{ EPOLLOUT, EPOLL_CTL_MOD },
    544 	/* old= rw, write:  0, read:del, close:add */
    545 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    546 	/* old= rw, write:  0, read:del, close:del */
    547 	{ EPOLLOUT, EPOLL_CTL_MOD },
    548 	/* old= rw, write:  0, read:del, close:xxx */
    549 	{ 0, 255 },
    550 	/* old= rw, write:  0, read:xxx, close:  0 */
    551 	{ 0, 255 },
    552 	/* old= rw, write:  0, read:xxx, close:add */
    553 	{ 0, 255 },
    554 	/* old= rw, write:  0, read:xxx, close:del */
    555 	{ 0, 255 },
    556 	/* old= rw, write:  0, read:xxx, close:xxx */
    557 	{ 0, 255 },
    558 	/* old= rw, write:add, read:  0, close:  0 */
    559 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    560 	/* old= rw, write:add, read:  0, close:add */
    561 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    562 	/* old= rw, write:add, read:  0, close:del */
    563 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    564 	/* old= rw, write:add, read:  0, close:xxx */
    565 	{ 0, 255 },
    566 	/* old= rw, write:add, read:add, close:  0 */
    567 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    568 	/* old= rw, write:add, read:add, close:add */
    569 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    570 	/* old= rw, write:add, read:add, close:del */
    571 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    572 	/* old= rw, write:add, read:add, close:xxx */
    573 	{ 0, 255 },
    574 	/* old= rw, write:add, read:del, close:  0 */
    575 	{ EPOLLOUT, EPOLL_CTL_MOD },
    576 	/* old= rw, write:add, read:del, close:add */
    577 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    578 	/* old= rw, write:add, read:del, close:del */
    579 	{ EPOLLOUT, EPOLL_CTL_MOD },
    580 	/* old= rw, write:add, read:del, close:xxx */
    581 	{ 0, 255 },
    582 	/* old= rw, write:add, read:xxx, close:  0 */
    583 	{ 0, 255 },
    584 	/* old= rw, write:add, read:xxx, close:add */
    585 	{ 0, 255 },
    586 	/* old= rw, write:add, read:xxx, close:del */
    587 	{ 0, 255 },
    588 	/* old= rw, write:add, read:xxx, close:xxx */
    589 	{ 0, 255 },
    590 	/* old= rw, write:del, read:  0, close:  0 */
    591 	{ EPOLLIN, EPOLL_CTL_MOD },
    592 	/* old= rw, write:del, read:  0, close:add */
    593 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    594 	/* old= rw, write:del, read:  0, close:del */
    595 	{ EPOLLIN, EPOLL_CTL_MOD },
    596 	/* old= rw, write:del, read:  0, close:xxx */
    597 	{ 0, 255 },
    598 	/* old= rw, write:del, read:add, close:  0 */
    599 	{ EPOLLIN, EPOLL_CTL_MOD },
    600 	/* old= rw, write:del, read:add, close:add */
    601 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    602 	/* old= rw, write:del, read:add, close:del */
    603 	{ EPOLLIN, EPOLL_CTL_MOD },
    604 	/* old= rw, write:del, read:add, close:xxx */
    605 	{ 0, 255 },
    606 	/* old= rw, write:del, read:del, close:  0 */
    607 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_DEL },
    608 	/* old= rw, write:del, read:del, close:add */
    609 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    610 	/* old= rw, write:del, read:del, close:del */
    611 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    612 	/* old= rw, write:del, read:del, close:xxx */
    613 	{ 0, 255 },
    614 	/* old= rw, write:del, read:xxx, close:  0 */
    615 	{ 0, 255 },
    616 	/* old= rw, write:del, read:xxx, close:add */
    617 	{ 0, 255 },
    618 	/* old= rw, write:del, read:xxx, close:del */
    619 	{ 0, 255 },
    620 	/* old= rw, write:del, read:xxx, close:xxx */
    621 	{ 0, 255 },
    622 	/* old= rw, write:xxx, read:  0, close:  0 */
    623 	{ 0, 255 },
    624 	/* old= rw, write:xxx, read:  0, close:add */
    625 	{ 0, 255 },
    626 	/* old= rw, write:xxx, read:  0, close:del */
    627 	{ 0, 255 },
    628 	/* old= rw, write:xxx, read:  0, close:xxx */
    629 	{ 0, 255 },
    630 	/* old= rw, write:xxx, read:add, close:  0 */
    631 	{ 0, 255 },
    632 	/* old= rw, write:xxx, read:add, close:add */
    633 	{ 0, 255 },
    634 	/* old= rw, write:xxx, read:add, close:del */
    635 	{ 0, 255 },
    636 	/* old= rw, write:xxx, read:add, close:xxx */
    637 	{ 0, 255 },
    638 	/* old= rw, write:xxx, read:del, close:  0 */
    639 	{ 0, 255 },
    640 	/* old= rw, write:xxx, read:del, close:add */
    641 	{ 0, 255 },
    642 	/* old= rw, write:xxx, read:del, close:del */
    643 	{ 0, 255 },
    644 	/* old= rw, write:xxx, read:del, close:xxx */
    645 	{ 0, 255 },
    646 	/* old= rw, write:xxx, read:xxx, close:  0 */
    647 	{ 0, 255 },
    648 	/* old= rw, write:xxx, read:xxx, close:add */
    649 	{ 0, 255 },
    650 	/* old= rw, write:xxx, read:xxx, close:del */
    651 	{ 0, 255 },
    652 	/* old= rw, write:xxx, read:xxx, close:xxx */
    653 	{ 0, 255 },
    654 	/* old=  c, write:  0, read:  0, close:  0 */
    655 	{ 0, 0 },
    656 	/* old=  c, write:  0, read:  0, close:add */
    657 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    658 	/* old=  c, write:  0, read:  0, close:del */
    659 	{ EPOLLRDHUP, EPOLL_CTL_DEL },
    660 	/* old=  c, write:  0, read:  0, close:xxx */
    661 	{ 0, 255 },
    662 	/* old=  c, write:  0, read:add, close:  0 */
    663 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    664 	/* old=  c, write:  0, read:add, close:add */
    665 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    666 	/* old=  c, write:  0, read:add, close:del */
    667 	{ EPOLLIN, EPOLL_CTL_MOD },
    668 	/* old=  c, write:  0, read:add, close:xxx */
    669 	{ 0, 255 },
    670 	/* old=  c, write:  0, read:del, close:  0 */
    671 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    672 	/* old=  c, write:  0, read:del, close:add */
    673 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    674 	/* old=  c, write:  0, read:del, close:del */
    675 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_DEL },
    676 	/* old=  c, write:  0, read:del, close:xxx */
    677 	{ 0, 255 },
    678 	/* old=  c, write:  0, read:xxx, close:  0 */
    679 	{ 0, 255 },
    680 	/* old=  c, write:  0, read:xxx, close:add */
    681 	{ 0, 255 },
    682 	/* old=  c, write:  0, read:xxx, close:del */
    683 	{ 0, 255 },
    684 	/* old=  c, write:  0, read:xxx, close:xxx */
    685 	{ 0, 255 },
    686 	/* old=  c, write:add, read:  0, close:  0 */
    687 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    688 	/* old=  c, write:add, read:  0, close:add */
    689 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    690 	/* old=  c, write:add, read:  0, close:del */
    691 	{ EPOLLOUT, EPOLL_CTL_MOD },
    692 	/* old=  c, write:add, read:  0, close:xxx */
    693 	{ 0, 255 },
    694 	/* old=  c, write:add, read:add, close:  0 */
    695 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    696 	/* old=  c, write:add, read:add, close:add */
    697 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    698 	/* old=  c, write:add, read:add, close:del */
    699 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    700 	/* old=  c, write:add, read:add, close:xxx */
    701 	{ 0, 255 },
    702 	/* old=  c, write:add, read:del, close:  0 */
    703 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    704 	/* old=  c, write:add, read:del, close:add */
    705 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    706 	/* old=  c, write:add, read:del, close:del */
    707 	{ EPOLLOUT, EPOLL_CTL_MOD },
    708 	/* old=  c, write:add, read:del, close:xxx */
    709 	{ 0, 255 },
    710 	/* old=  c, write:add, read:xxx, close:  0 */
    711 	{ 0, 255 },
    712 	/* old=  c, write:add, read:xxx, close:add */
    713 	{ 0, 255 },
    714 	/* old=  c, write:add, read:xxx, close:del */
    715 	{ 0, 255 },
    716 	/* old=  c, write:add, read:xxx, close:xxx */
    717 	{ 0, 255 },
    718 	/* old=  c, write:del, read:  0, close:  0 */
    719 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    720 	/* old=  c, write:del, read:  0, close:add */
    721 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    722 	/* old=  c, write:del, read:  0, close:del */
    723 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    724 	/* old=  c, write:del, read:  0, close:xxx */
    725 	{ 0, 255 },
    726 	/* old=  c, write:del, read:add, close:  0 */
    727 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    728 	/* old=  c, write:del, read:add, close:add */
    729 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    730 	/* old=  c, write:del, read:add, close:del */
    731 	{ EPOLLIN, EPOLL_CTL_MOD },
    732 	/* old=  c, write:del, read:add, close:xxx */
    733 	{ 0, 255 },
    734 	/* old=  c, write:del, read:del, close:  0 */
    735 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    736 	/* old=  c, write:del, read:del, close:add */
    737 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    738 	/* old=  c, write:del, read:del, close:del */
    739 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    740 	/* old=  c, write:del, read:del, close:xxx */
    741 	{ 0, 255 },
    742 	/* old=  c, write:del, read:xxx, close:  0 */
    743 	{ 0, 255 },
    744 	/* old=  c, write:del, read:xxx, close:add */
    745 	{ 0, 255 },
    746 	/* old=  c, write:del, read:xxx, close:del */
    747 	{ 0, 255 },
    748 	/* old=  c, write:del, read:xxx, close:xxx */
    749 	{ 0, 255 },
    750 	/* old=  c, write:xxx, read:  0, close:  0 */
    751 	{ 0, 255 },
    752 	/* old=  c, write:xxx, read:  0, close:add */
    753 	{ 0, 255 },
    754 	/* old=  c, write:xxx, read:  0, close:del */
    755 	{ 0, 255 },
    756 	/* old=  c, write:xxx, read:  0, close:xxx */
    757 	{ 0, 255 },
    758 	/* old=  c, write:xxx, read:add, close:  0 */
    759 	{ 0, 255 },
    760 	/* old=  c, write:xxx, read:add, close:add */
    761 	{ 0, 255 },
    762 	/* old=  c, write:xxx, read:add, close:del */
    763 	{ 0, 255 },
    764 	/* old=  c, write:xxx, read:add, close:xxx */
    765 	{ 0, 255 },
    766 	/* old=  c, write:xxx, read:del, close:  0 */
    767 	{ 0, 255 },
    768 	/* old=  c, write:xxx, read:del, close:add */
    769 	{ 0, 255 },
    770 	/* old=  c, write:xxx, read:del, close:del */
    771 	{ 0, 255 },
    772 	/* old=  c, write:xxx, read:del, close:xxx */
    773 	{ 0, 255 },
    774 	/* old=  c, write:xxx, read:xxx, close:  0 */
    775 	{ 0, 255 },
    776 	/* old=  c, write:xxx, read:xxx, close:add */
    777 	{ 0, 255 },
    778 	/* old=  c, write:xxx, read:xxx, close:del */
    779 	{ 0, 255 },
    780 	/* old=  c, write:xxx, read:xxx, close:xxx */
    781 	{ 0, 255 },
    782 	/* old= cr, write:  0, read:  0, close:  0 */
    783 	{ 0, 0 },
    784 	/* old= cr, write:  0, read:  0, close:add */
    785 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    786 	/* old= cr, write:  0, read:  0, close:del */
    787 	{ EPOLLIN, EPOLL_CTL_MOD },
    788 	/* old= cr, write:  0, read:  0, close:xxx */
    789 	{ 0, 255 },
    790 	/* old= cr, write:  0, read:add, close:  0 */
    791 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    792 	/* old= cr, write:  0, read:add, close:add */
    793 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    794 	/* old= cr, write:  0, read:add, close:del */
    795 	{ EPOLLIN, EPOLL_CTL_MOD },
    796 	/* old= cr, write:  0, read:add, close:xxx */
    797 	{ 0, 255 },
    798 	/* old= cr, write:  0, read:del, close:  0 */
    799 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    800 	/* old= cr, write:  0, read:del, close:add */
    801 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    802 	/* old= cr, write:  0, read:del, close:del */
    803 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_DEL },
    804 	/* old= cr, write:  0, read:del, close:xxx */
    805 	{ 0, 255 },
    806 	/* old= cr, write:  0, read:xxx, close:  0 */
    807 	{ 0, 255 },
    808 	/* old= cr, write:  0, read:xxx, close:add */
    809 	{ 0, 255 },
    810 	/* old= cr, write:  0, read:xxx, close:del */
    811 	{ 0, 255 },
    812 	/* old= cr, write:  0, read:xxx, close:xxx */
    813 	{ 0, 255 },
    814 	/* old= cr, write:add, read:  0, close:  0 */
    815 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    816 	/* old= cr, write:add, read:  0, close:add */
    817 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    818 	/* old= cr, write:add, read:  0, close:del */
    819 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    820 	/* old= cr, write:add, read:  0, close:xxx */
    821 	{ 0, 255 },
    822 	/* old= cr, write:add, read:add, close:  0 */
    823 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    824 	/* old= cr, write:add, read:add, close:add */
    825 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    826 	/* old= cr, write:add, read:add, close:del */
    827 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    828 	/* old= cr, write:add, read:add, close:xxx */
    829 	{ 0, 255 },
    830 	/* old= cr, write:add, read:del, close:  0 */
    831 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    832 	/* old= cr, write:add, read:del, close:add */
    833 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    834 	/* old= cr, write:add, read:del, close:del */
    835 	{ EPOLLOUT, EPOLL_CTL_MOD },
    836 	/* old= cr, write:add, read:del, close:xxx */
    837 	{ 0, 255 },
    838 	/* old= cr, write:add, read:xxx, close:  0 */
    839 	{ 0, 255 },
    840 	/* old= cr, write:add, read:xxx, close:add */
    841 	{ 0, 255 },
    842 	/* old= cr, write:add, read:xxx, close:del */
    843 	{ 0, 255 },
    844 	/* old= cr, write:add, read:xxx, close:xxx */
    845 	{ 0, 255 },
    846 	/* old= cr, write:del, read:  0, close:  0 */
    847 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    848 	/* old= cr, write:del, read:  0, close:add */
    849 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    850 	/* old= cr, write:del, read:  0, close:del */
    851 	{ EPOLLIN, EPOLL_CTL_MOD },
    852 	/* old= cr, write:del, read:  0, close:xxx */
    853 	{ 0, 255 },
    854 	/* old= cr, write:del, read:add, close:  0 */
    855 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    856 	/* old= cr, write:del, read:add, close:add */
    857 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    858 	/* old= cr, write:del, read:add, close:del */
    859 	{ EPOLLIN, EPOLL_CTL_MOD },
    860 	/* old= cr, write:del, read:add, close:xxx */
    861 	{ 0, 255 },
    862 	/* old= cr, write:del, read:del, close:  0 */
    863 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    864 	/* old= cr, write:del, read:del, close:add */
    865 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    866 	/* old= cr, write:del, read:del, close:del */
    867 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    868 	/* old= cr, write:del, read:del, close:xxx */
    869 	{ 0, 255 },
    870 	/* old= cr, write:del, read:xxx, close:  0 */
    871 	{ 0, 255 },
    872 	/* old= cr, write:del, read:xxx, close:add */
    873 	{ 0, 255 },
    874 	/* old= cr, write:del, read:xxx, close:del */
    875 	{ 0, 255 },
    876 	/* old= cr, write:del, read:xxx, close:xxx */
    877 	{ 0, 255 },
    878 	/* old= cr, write:xxx, read:  0, close:  0 */
    879 	{ 0, 255 },
    880 	/* old= cr, write:xxx, read:  0, close:add */
    881 	{ 0, 255 },
    882 	/* old= cr, write:xxx, read:  0, close:del */
    883 	{ 0, 255 },
    884 	/* old= cr, write:xxx, read:  0, close:xxx */
    885 	{ 0, 255 },
    886 	/* old= cr, write:xxx, read:add, close:  0 */
    887 	{ 0, 255 },
    888 	/* old= cr, write:xxx, read:add, close:add */
    889 	{ 0, 255 },
    890 	/* old= cr, write:xxx, read:add, close:del */
    891 	{ 0, 255 },
    892 	/* old= cr, write:xxx, read:add, close:xxx */
    893 	{ 0, 255 },
    894 	/* old= cr, write:xxx, read:del, close:  0 */
    895 	{ 0, 255 },
    896 	/* old= cr, write:xxx, read:del, close:add */
    897 	{ 0, 255 },
    898 	/* old= cr, write:xxx, read:del, close:del */
    899 	{ 0, 255 },
    900 	/* old= cr, write:xxx, read:del, close:xxx */
    901 	{ 0, 255 },
    902 	/* old= cr, write:xxx, read:xxx, close:  0 */
    903 	{ 0, 255 },
    904 	/* old= cr, write:xxx, read:xxx, close:add */
    905 	{ 0, 255 },
    906 	/* old= cr, write:xxx, read:xxx, close:del */
    907 	{ 0, 255 },
    908 	/* old= cr, write:xxx, read:xxx, close:xxx */
    909 	{ 0, 255 },
    910 	/* old= cw, write:  0, read:  0, close:  0 */
    911 	{ 0, 0 },
    912 	/* old= cw, write:  0, read:  0, close:add */
    913 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    914 	/* old= cw, write:  0, read:  0, close:del */
    915 	{ EPOLLOUT, EPOLL_CTL_MOD },
    916 	/* old= cw, write:  0, read:  0, close:xxx */
    917 	{ 0, 255 },
    918 	/* old= cw, write:  0, read:add, close:  0 */
    919 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    920 	/* old= cw, write:  0, read:add, close:add */
    921 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    922 	/* old= cw, write:  0, read:add, close:del */
    923 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    924 	/* old= cw, write:  0, read:add, close:xxx */
    925 	{ 0, 255 },
    926 	/* old= cw, write:  0, read:del, close:  0 */
    927 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    928 	/* old= cw, write:  0, read:del, close:add */
    929 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    930 	/* old= cw, write:  0, read:del, close:del */
    931 	{ EPOLLOUT, EPOLL_CTL_MOD },
    932 	/* old= cw, write:  0, read:del, close:xxx */
    933 	{ 0, 255 },
    934 	/* old= cw, write:  0, read:xxx, close:  0 */
    935 	{ 0, 255 },
    936 	/* old= cw, write:  0, read:xxx, close:add */
    937 	{ 0, 255 },
    938 	/* old= cw, write:  0, read:xxx, close:del */
    939 	{ 0, 255 },
    940 	/* old= cw, write:  0, read:xxx, close:xxx */
    941 	{ 0, 255 },
    942 	/* old= cw, write:add, read:  0, close:  0 */
    943 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    944 	/* old= cw, write:add, read:  0, close:add */
    945 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    946 	/* old= cw, write:add, read:  0, close:del */
    947 	{ EPOLLOUT, EPOLL_CTL_MOD },
    948 	/* old= cw, write:add, read:  0, close:xxx */
    949 	{ 0, 255 },
    950 	/* old= cw, write:add, read:add, close:  0 */
    951 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    952 	/* old= cw, write:add, read:add, close:add */
    953 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    954 	/* old= cw, write:add, read:add, close:del */
    955 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
    956 	/* old= cw, write:add, read:add, close:xxx */
    957 	{ 0, 255 },
    958 	/* old= cw, write:add, read:del, close:  0 */
    959 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    960 	/* old= cw, write:add, read:del, close:add */
    961 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
    962 	/* old= cw, write:add, read:del, close:del */
    963 	{ EPOLLOUT, EPOLL_CTL_MOD },
    964 	/* old= cw, write:add, read:del, close:xxx */
    965 	{ 0, 255 },
    966 	/* old= cw, write:add, read:xxx, close:  0 */
    967 	{ 0, 255 },
    968 	/* old= cw, write:add, read:xxx, close:add */
    969 	{ 0, 255 },
    970 	/* old= cw, write:add, read:xxx, close:del */
    971 	{ 0, 255 },
    972 	/* old= cw, write:add, read:xxx, close:xxx */
    973 	{ 0, 255 },
    974 	/* old= cw, write:del, read:  0, close:  0 */
    975 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    976 	/* old= cw, write:del, read:  0, close:add */
    977 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    978 	/* old= cw, write:del, read:  0, close:del */
    979 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    980 	/* old= cw, write:del, read:  0, close:xxx */
    981 	{ 0, 255 },
    982 	/* old= cw, write:del, read:add, close:  0 */
    983 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    984 	/* old= cw, write:del, read:add, close:add */
    985 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
    986 	/* old= cw, write:del, read:add, close:del */
    987 	{ EPOLLIN, EPOLL_CTL_MOD },
    988 	/* old= cw, write:del, read:add, close:xxx */
    989 	{ 0, 255 },
    990 	/* old= cw, write:del, read:del, close:  0 */
    991 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    992 	/* old= cw, write:del, read:del, close:add */
    993 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
    994 	/* old= cw, write:del, read:del, close:del */
    995 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
    996 	/* old= cw, write:del, read:del, close:xxx */
    997 	{ 0, 255 },
    998 	/* old= cw, write:del, read:xxx, close:  0 */
    999 	{ 0, 255 },
   1000 	/* old= cw, write:del, read:xxx, close:add */
   1001 	{ 0, 255 },
   1002 	/* old= cw, write:del, read:xxx, close:del */
   1003 	{ 0, 255 },
   1004 	/* old= cw, write:del, read:xxx, close:xxx */
   1005 	{ 0, 255 },
   1006 	/* old= cw, write:xxx, read:  0, close:  0 */
   1007 	{ 0, 255 },
   1008 	/* old= cw, write:xxx, read:  0, close:add */
   1009 	{ 0, 255 },
   1010 	/* old= cw, write:xxx, read:  0, close:del */
   1011 	{ 0, 255 },
   1012 	/* old= cw, write:xxx, read:  0, close:xxx */
   1013 	{ 0, 255 },
   1014 	/* old= cw, write:xxx, read:add, close:  0 */
   1015 	{ 0, 255 },
   1016 	/* old= cw, write:xxx, read:add, close:add */
   1017 	{ 0, 255 },
   1018 	/* old= cw, write:xxx, read:add, close:del */
   1019 	{ 0, 255 },
   1020 	/* old= cw, write:xxx, read:add, close:xxx */
   1021 	{ 0, 255 },
   1022 	/* old= cw, write:xxx, read:del, close:  0 */
   1023 	{ 0, 255 },
   1024 	/* old= cw, write:xxx, read:del, close:add */
   1025 	{ 0, 255 },
   1026 	/* old= cw, write:xxx, read:del, close:del */
   1027 	{ 0, 255 },
   1028 	/* old= cw, write:xxx, read:del, close:xxx */
   1029 	{ 0, 255 },
   1030 	/* old= cw, write:xxx, read:xxx, close:  0 */
   1031 	{ 0, 255 },
   1032 	/* old= cw, write:xxx, read:xxx, close:add */
   1033 	{ 0, 255 },
   1034 	/* old= cw, write:xxx, read:xxx, close:del */
   1035 	{ 0, 255 },
   1036 	/* old= cw, write:xxx, read:xxx, close:xxx */
   1037 	{ 0, 255 },
   1038 	/* old=crw, write:  0, read:  0, close:  0 */
   1039 	{ 0, 0 },
   1040 	/* old=crw, write:  0, read:  0, close:add */
   1041 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1042 	/* old=crw, write:  0, read:  0, close:del */
   1043 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
   1044 	/* old=crw, write:  0, read:  0, close:xxx */
   1045 	{ 0, 255 },
   1046 	/* old=crw, write:  0, read:add, close:  0 */
   1047 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1048 	/* old=crw, write:  0, read:add, close:add */
   1049 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1050 	/* old=crw, write:  0, read:add, close:del */
   1051 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
   1052 	/* old=crw, write:  0, read:add, close:xxx */
   1053 	{ 0, 255 },
   1054 	/* old=crw, write:  0, read:del, close:  0 */
   1055 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1056 	/* old=crw, write:  0, read:del, close:add */
   1057 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1058 	/* old=crw, write:  0, read:del, close:del */
   1059 	{ EPOLLOUT, EPOLL_CTL_MOD },
   1060 	/* old=crw, write:  0, read:del, close:xxx */
   1061 	{ 0, 255 },
   1062 	/* old=crw, write:  0, read:xxx, close:  0 */
   1063 	{ 0, 255 },
   1064 	/* old=crw, write:  0, read:xxx, close:add */
   1065 	{ 0, 255 },
   1066 	/* old=crw, write:  0, read:xxx, close:del */
   1067 	{ 0, 255 },
   1068 	/* old=crw, write:  0, read:xxx, close:xxx */
   1069 	{ 0, 255 },
   1070 	/* old=crw, write:add, read:  0, close:  0 */
   1071 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1072 	/* old=crw, write:add, read:  0, close:add */
   1073 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1074 	/* old=crw, write:add, read:  0, close:del */
   1075 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
   1076 	/* old=crw, write:add, read:  0, close:xxx */
   1077 	{ 0, 255 },
   1078 	/* old=crw, write:add, read:add, close:  0 */
   1079 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1080 	/* old=crw, write:add, read:add, close:add */
   1081 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1082 	/* old=crw, write:add, read:add, close:del */
   1083 	{ EPOLLIN|EPOLLOUT, EPOLL_CTL_MOD },
   1084 	/* old=crw, write:add, read:add, close:xxx */
   1085 	{ 0, 255 },
   1086 	/* old=crw, write:add, read:del, close:  0 */
   1087 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1088 	/* old=crw, write:add, read:del, close:add */
   1089 	{ EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_MOD },
   1090 	/* old=crw, write:add, read:del, close:del */
   1091 	{ EPOLLOUT, EPOLL_CTL_MOD },
   1092 	/* old=crw, write:add, read:del, close:xxx */
   1093 	{ 0, 255 },
   1094 	/* old=crw, write:add, read:xxx, close:  0 */
   1095 	{ 0, 255 },
   1096 	/* old=crw, write:add, read:xxx, close:add */
   1097 	{ 0, 255 },
   1098 	/* old=crw, write:add, read:xxx, close:del */
   1099 	{ 0, 255 },
   1100 	/* old=crw, write:add, read:xxx, close:xxx */
   1101 	{ 0, 255 },
   1102 	/* old=crw, write:del, read:  0, close:  0 */
   1103 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
   1104 	/* old=crw, write:del, read:  0, close:add */
   1105 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
   1106 	/* old=crw, write:del, read:  0, close:del */
   1107 	{ EPOLLIN, EPOLL_CTL_MOD },
   1108 	/* old=crw, write:del, read:  0, close:xxx */
   1109 	{ 0, 255 },
   1110 	/* old=crw, write:del, read:add, close:  0 */
   1111 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
   1112 	/* old=crw, write:del, read:add, close:add */
   1113 	{ EPOLLIN|EPOLLRDHUP, EPOLL_CTL_MOD },
   1114 	/* old=crw, write:del, read:add, close:del */
   1115 	{ EPOLLIN, EPOLL_CTL_MOD },
   1116 	/* old=crw, write:del, read:add, close:xxx */
   1117 	{ 0, 255 },
   1118 	/* old=crw, write:del, read:del, close:  0 */
   1119 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
   1120 	/* old=crw, write:del, read:del, close:add */
   1121 	{ EPOLLRDHUP, EPOLL_CTL_MOD },
   1122 	/* old=crw, write:del, read:del, close:del */
   1123 	{ EPOLLIN|EPOLLOUT|EPOLLRDHUP, EPOLL_CTL_DEL },
   1124 	/* old=crw, write:del, read:del, close:xxx */
   1125 	{ 0, 255 },
   1126 	/* old=crw, write:del, read:xxx, close:  0 */
   1127 	{ 0, 255 },
   1128 	/* old=crw, write:del, read:xxx, close:add */
   1129 	{ 0, 255 },
   1130 	/* old=crw, write:del, read:xxx, close:del */
   1131 	{ 0, 255 },
   1132 	/* old=crw, write:del, read:xxx, close:xxx */
   1133 	{ 0, 255 },
   1134 	/* old=crw, write:xxx, read:  0, close:  0 */
   1135 	{ 0, 255 },
   1136 	/* old=crw, write:xxx, read:  0, close:add */
   1137 	{ 0, 255 },
   1138 	/* old=crw, write:xxx, read:  0, close:del */
   1139 	{ 0, 255 },
   1140 	/* old=crw, write:xxx, read:  0, close:xxx */
   1141 	{ 0, 255 },
   1142 	/* old=crw, write:xxx, read:add, close:  0 */
   1143 	{ 0, 255 },
   1144 	/* old=crw, write:xxx, read:add, close:add */
   1145 	{ 0, 255 },
   1146 	/* old=crw, write:xxx, read:add, close:del */
   1147 	{ 0, 255 },
   1148 	/* old=crw, write:xxx, read:add, close:xxx */
   1149 	{ 0, 255 },
   1150 	/* old=crw, write:xxx, read:del, close:  0 */
   1151 	{ 0, 255 },
   1152 	/* old=crw, write:xxx, read:del, close:add */
   1153 	{ 0, 255 },
   1154 	/* old=crw, write:xxx, read:del, close:del */
   1155 	{ 0, 255 },
   1156 	/* old=crw, write:xxx, read:del, close:xxx */
   1157 	{ 0, 255 },
   1158 	/* old=crw, write:xxx, read:xxx, close:  0 */
   1159 	{ 0, 255 },
   1160 	/* old=crw, write:xxx, read:xxx, close:add */
   1161 	{ 0, 255 },
   1162 	/* old=crw, write:xxx, read:xxx, close:del */
   1163 	{ 0, 255 },
   1164 	/* old=crw, write:xxx, read:xxx, close:xxx */
   1165 	{ 0, 255 },
   1166 };
   1167 
   1168 #endif
   1169