bsd/netat/atp_open.c

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