8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  * Copyright (c) 2016 by Delphix. All rights reserved.
  25  */
  26 
  27 /*
  28  * Copyright (c) 2015, Joyent, Inc.  All rights reserved.
  29  * Copyright 2017 James S Blachly, MD <james.blachly@gmail.com>
  30  */
  31 
  32 /*
  33  * Memory special file
  34  */
  35 
  36 #include <sys/types.h>
  37 #include <sys/param.h>
  38 #include <sys/user.h>
  39 #include <sys/buf.h>
  40 #include <sys/systm.h>
  41 #include <sys/cred.h>
  42 #include <sys/vm.h>
  43 #include <sys/uio.h>
  44 #include <sys/mman.h>
  45 #include <sys/kmem.h>
  46 #include <vm/seg.h>
  47 #include <vm/page.h>
  48 #include <sys/stat.h>

 242 }
 243 
 244 struct pollhead mm_pollhd;
 245 
 246 /*ARGSUSED*/
 247 static int
 248 mmchpoll(dev_t dev, short events, int anyyet, short *reventsp,
 249     struct pollhead **phpp)
 250 {
 251         switch (getminor(dev)) {
 252         case M_NULL:
 253         case M_ZERO:
 254         case M_FULL:
 255         case M_MEM:
 256         case M_KMEM:
 257         case M_ALLKMEM:
 258                 *reventsp = events & (POLLIN | POLLOUT | POLLPRI | POLLRDNORM |
 259                     POLLWRNORM | POLLRDBAND | POLLWRBAND);
 260                 /*
 261                  * A non NULL pollhead pointer should be returned in case
 262                  * user polls for 0 events.
 263                  */
 264                 *phpp = !anyyet && !*reventsp ?
 265                     &mm_pollhd : (struct pollhead *)NULL;

 266                 return (0);
 267         default:
 268                 /* no other devices currently support polling */
 269                 return (ENXIO);
 270         }
 271 }
 272 
 273 static int
 274 mmpropop(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, int flags,
 275     char *name, caddr_t valuep, int *lengthp)
 276 {
 277         /*
 278          * implement zero size to reduce overhead (avoid two failing
 279          * property lookups per stat).
 280          */
 281         return (ddi_prop_op_size(dev, dip, prop_op,
 282             flags, name, valuep, lengthp, 0));
 283 }
 284 
 285 static int

   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  * Copyright (c) 2016 by Delphix. All rights reserved.
  25  */
  26 
  27 /*
  28  * Copyright 2017 Joyent, Inc.
  29  * Copyright 2017 James S Blachly, MD <james.blachly@gmail.com>
  30  */
  31 
  32 /*
  33  * Memory special file
  34  */
  35 
  36 #include <sys/types.h>
  37 #include <sys/param.h>
  38 #include <sys/user.h>
  39 #include <sys/buf.h>
  40 #include <sys/systm.h>
  41 #include <sys/cred.h>
  42 #include <sys/vm.h>
  43 #include <sys/uio.h>
  44 #include <sys/mman.h>
  45 #include <sys/kmem.h>
  46 #include <vm/seg.h>
  47 #include <vm/page.h>
  48 #include <sys/stat.h>

 242 }
 243 
 244 struct pollhead mm_pollhd;
 245 
 246 /*ARGSUSED*/
 247 static int
 248 mmchpoll(dev_t dev, short events, int anyyet, short *reventsp,
 249     struct pollhead **phpp)
 250 {
 251         switch (getminor(dev)) {
 252         case M_NULL:
 253         case M_ZERO:
 254         case M_FULL:
 255         case M_MEM:
 256         case M_KMEM:
 257         case M_ALLKMEM:
 258                 *reventsp = events & (POLLIN | POLLOUT | POLLPRI | POLLRDNORM |
 259                     POLLWRNORM | POLLRDBAND | POLLWRBAND);
 260                 /*
 261                  * A non NULL pollhead pointer should be returned in case
 262                  * user polls for 0 events or is doing an edge-triggerd poll.
 263                  */
 264                 if ((!*reventsp && !anyyet) || (events & POLLET)) {
 265                         *phpp = &mm_pollhd;
 266                 }
 267                 return (0);
 268         default:
 269                 /* no other devices currently support polling */
 270                 return (ENXIO);
 271         }
 272 }
 273 
 274 static int
 275 mmpropop(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, int flags,
 276     char *name, caddr_t valuep, int *lengthp)
 277 {
 278         /*
 279          * implement zero size to reduce overhead (avoid two failing
 280          * property lookups per stat).
 281          */
 282         return (ddi_prop_op_size(dev, dip, prop_op,
 283             flags, name, valuep, lengthp, 0));
 284 }
 285 
 286 static int