bsd/netat/atp_open.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  *      Copyright (c) 1996-1998 Apple Computer, Inc.
  25  *      All Rights Reserved.
  26  */
  27
  28 /*    Modified for MP, 1996 by Tuyen Nguyen
  29  *    Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  30  */
  31 #define ATP_DECLARE
  32
  33 #include <sys/errno.h>
  34 #include <sys/types.h>
  35 #include <sys/param.h>
  36 #include <machine/spl.h>
  37 #include <sys/systm.h>
  38 #include <sys/kernel.h>
  39 #include <sys/proc.h>
  40 #include <sys/filedesc.h>
  41 #include <sys/fcntl.h>
  42 #include <sys/mbuf.h>
  43 #include <sys/ioctl.h>
  44 #include <sys/malloc.h>
  45 #include <sys/socket.h>
  46 #include <vm/vm_kern.h>         /* for kernel_map */
  47
  48 #include <netat/sysglue.h>
  49 #include <netat/appletalk.h>
  50 #include <netat/ddp.h>
  51 #include <netat/at_pcb.h>
  52 #include <netat/atp.h>
  53 #include <netat/debug.h>
  54
  55 /*
  56  *      The init routine creates all the free lists
  57  *      Version 1.4 of atp_open.c on 89/02/09 17:53:11
  58  */
  59
  60 int atp_inited = 0;
  61 struct atp_rcb_qhead atp_need_rel;
  62 atlock_t atpall_lock;
  63 atlock_t atptmo_lock;
  64 atlock_t atpgen_lock;
  65
  66 /**********/
  67 int atp_pidM[256];
  68 gref_t *atp_inputQ[256];
  69 struct atp_state *atp_used_list;
  70
  71 int atp_input(mp)
  72         gbuf_t *mp;
  73 {
  74         register gref_t *gref;
  75
  76         switch (gbuf_type(mp)) {
  77         case MSG_DATA:
  78                 gref = atp_inputQ[((at_ddp_t *)gbuf_rptr(mp))->dst_socket];
  79                 if ((gref == 0) || (gref == (gref_t *)1)) {
  80                         dPrintf(D_M_ATP, D_L_WARNING, ("atp_input: no socket, skt=%d\n",
  81                                 ((at_ddp_t *)gbuf_rptr(mp))->dst_socket));
  82                         gbuf_freem(mp);
  83                         return 0;
  84                 }
  85                 break;
  86
  87         case MSG_IOCACK:
  88         case MSG_IOCNAK:
  89                 gref = (gref_t *)((ioc_t *)gbuf_rptr(mp))->ioc_private;
  90                 break;
  91
  92         case MSG_IOCTL:
  93         default:
  94                 dPrintf(D_M_ATP, D_L_WARNING, ("atp_input: unknown msg, type=%d\n",
  95                         gbuf_type(mp)));
  96                 gbuf_freem(mp);
  97                 return 0;
  98         }
  99
 100         atp_rput(gref, mp);
 101         return 0;
 102 }
 103
 104 /**********/
 105 void atp_init()
 106 {
 107   int i;
 108
 109   if (!atp_inited) {
 110         atp_inited = 1;
 111         atp_used_list = 0;
 112         atp_trans_abort.head = NULL;
 113         atp_trans_abort.tail = NULL;
 114
 115         atp_need_rel.head = NULL;
 116         atp_need_rel.tail = NULL;
 117
 118         bzero(atp_inputQ, sizeof(atp_inputQ));
 119         bzero(atp_pidM, sizeof(atp_pidM));
 120         asp_init();
 121   }
 122 }
 123
 124 /*
 125  *      The open routine allocates a state structure
 126  */
 127
 128 /*ARGSUSED*/
 129 int atp_open(gref, flag)
 130         gref_t *gref;
 131         int flag;
 132 {
 133         register struct atp_state *atp;
 134         register int s, i;
 135         vm_offset_t     temp;
 136
 137         /*
 138          * Allocate and init state and reply control block lists
 139          * if this is the first open
 140          */
 141         if (atp_rcb_data == NULL) {
 142                 if (kmem_alloc(kernel_map, &temp, sizeof(struct atp_rcb) * NATP_RCB) != KERN_SUCCESS)
 143                         return(ENOMEM);
 144                 if (atp_rcb_data == NULL) {
 145                         bzero((caddr_t)temp, sizeof(struct atp_rcb) * NATP_RCB);
 146                         atp_rcb_data = (struct atp_rcb*)temp;
 147                         for (i = 0; i < NATP_RCB; i++) {
 148                                 atp_rcb_data[i].rc_list.next = atp_rcb_free_list;
 149                                 atp_rcb_free_list = &atp_rcb_data[i];
 150                         }
 151                 } else
 152                         kmem_free(kernel_map, temp, sizeof(struct atp_rcb) * NATP_RCB); /* already allocated by another process */
 153         }
 154
 155         if (atp_state_data == NULL) {
 156                 if (kmem_alloc(kernel_map, &temp, sizeof(struct atp_state) * NATP_STATE) != KERN_SUCCESS)
 157                         return(ENOMEM);
 158                 if (atp_state_data == NULL) {
 159                   bzero((caddr_t)temp, sizeof(struct atp_state) * NATP_STATE);
 160                         atp_state_data = (struct atp_state*) temp;
 161                         for (i = 0; i < NATP_STATE; i++) {
 162                                 atp_state_data[i].atp_trans_waiting = atp_free_list;
 163                                 atp_free_list = &atp_state_data[i];
 164                         }
 165                 } else
 166                         kmem_free(kernel_map, temp, sizeof(struct atp_state) * NATP_STATE);
 167         }
 168
 169
 170         /*
 171          *      If no atp structure available return failure
 172          */
 173
 174         ATDISABLE(s, atpall_lock);
 175         if ((atp = atp_free_list) == NULL) {
 176                 ATENABLE(s, atpall_lock);
 177                 return(EAGAIN);
 178         }
 179
 180         /*
 181          *      Update free list
 182          */
 183
 184         atp_free_list = atp->atp_trans_waiting;
 185         ATENABLE(s, atpall_lock);
 186
 187         /*
 188          *      Initialize the data structure
 189          */
 190
 191         atp->dflag = 0;
 192         atp->atp_trans_wait.head = NULL;
 193         atp->atp_trans_waiting = NULL;
 194         atp->atp_gref = gref;
 195         atp->atp_retry = 10;
 196         atp->atp_timeout = HZ/8;
 197         atp->atp_rcb_waiting = NULL;
 198         atp->atp_rcb.head = NULL;
 199         atp->atp_flags = T_MPSAFE;
 200         atp->atp_socket_no = -1;
 201         atp->atp_pid = gref->pid;
 202         atp->atp_msgq = 0;
 203         ATLOCKINIT(atp->atp_lock);
 204         ATLOCKINIT(atp->atp_delay_lock);
 205         ATEVENTINIT(atp->atp_event);
 206         ATEVENTINIT(atp->atp_delay_event);
 207         gref->info = (void *)atp;
 208
 209         /*
 210          *      Return success
 211          */
 212
 213         if (flag) {
 214                 ATDISABLE(s, atpall_lock);
 215                 if ((atp->atp_trans_waiting = atp_used_list) != 0)
 216                         atp->atp_trans_waiting->atp_rcb_waiting = atp;
 217                 atp_used_list = atp;
 218                 ATENABLE(s, atpall_lock);
 219         }
 220         return(0);
 221 }
 222
 223 /*
 224  *      The close routine frees all the data structures
 225  */
 226
 227 /*ARGSUSED*/
 228 int atp_close(gref, flag)
 229         gref_t *gref;
 230         int flag;
 231 {
 232         extern void atp_req_timeout();
 233         register struct atp_state *atp;
 234         register struct atp_trans *trp;
 235         register struct atp_rcb *rcbp;
 236         register int s;
 237         int socket;
 238         pid_t pid;
 239
 240         atp = (struct atp_state *)gref->info;
 241         if (atp->dflag)
 242                 atp = (struct atp_state *)atp->atp_msgq;
 243         if (atp->atp_msgq) {
 244                 gbuf_freem(atp->atp_msgq);
 245                 atp->atp_msgq = 0;
 246         }
 247
 248         ATDISABLE(s, atp->atp_lock);
 249         atp->atp_flags |= ATP_CLOSING;
 250         socket = atp->atp_socket_no;
 251         if (socket != -1)
 252                 atp_inputQ[socket] = (gref_t *)1;
 253
 254         /*
 255          * blow away all pending timers
 256          */
 257         for (trp = atp->atp_trans_wait.head; trp; trp = trp->tr_list.next)
 258                 atp_untimout(atp_req_timeout, trp);
 259
 260         /*
 261          *      Release pending transactions + rcbs
 262          */
 263         while ((trp = atp->atp_trans_wait.head))
 264                 atp_free(trp);
 265         while ((rcbp = atp->atp_rcb.head))
 266                 atp_rcb_free(rcbp);
 267         while ((rcbp = atp->atp_attached.head))
 268                 atp_rcb_free(rcbp);
 269         ATENABLE(s, atp->atp_lock);
 270
 271         if (flag && (socket == -1))
 272                 atp_dequeue_atp(atp);
 273
 274         /*
 275          *      free the state variable
 276          */
 277         ATDISABLE(s, atpall_lock);
 278         atp->atp_socket_no = -1;
 279         atp->atp_trans_waiting = atp_free_list;
 280         atp_free_list = atp;
 281         ATENABLE(s, atpall_lock);
 282
 283         if (socket != -1) {
 284                 pid = (pid_t)atp_pidM[socket];
 285                 atp_pidM[socket] = 0;
 286                 atp_inputQ[socket] = NULL;
 287                 if (pid)
 288                     ddp_notify_nbp(socket, pid, DDP_ATP);
 289         }
 290
 291         return 0;
 292 }