usr/src/lib/libsmbfs/smb/iod_wk.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   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 /*
  23  * Copyright 2012 Nexenta Systems, Inc.  All rights reserved.
  24  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27
  28 /*
  29  * Functions called by the IO deamon (IOD).
  30  * Here in the library to simplify testing.
  31  */
  32
  33 #include <errno.h>
  34 #include <fcntl.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37 #include <stdlib.h>
  38 #include <unistd.h>
  39 #include <libintl.h>
  40
  41 #include <sys/byteorder.h>
  42 #include <sys/types.h>
  43 #include <sys/fcntl.h>
  44 #include <sys/ioctl.h>
  45 #include <sys/time.h>
  46 #include <sys/socket.h>
  47
  48 #include <netinet/in.h>
  49 #include <netinet/tcp.h>
  50 #include <arpa/inet.h>
  51
  52 #include <netsmb/smb.h>
  53 #include <netsmb/smb_lib.h>
  54 #include <netsmb/netbios.h>
  55 #include <netsmb/nb_lib.h>
  56 #include <netsmb/smb_dev.h>
  57
  58 #include "charsets.h"
  59 #include "private.h"
  60
  61 /*
  62  * Be the reader thread for this VC.
  63  */
  64 int
  65 smb_iod_work(smb_ctx_t *ctx)
  66 {
  67         smbioc_ssn_work_t *work = &ctx->ct_work;
  68         int     vcst, err = 0;
  69
  70         DPRINT("server: %s", ctx->ct_srvname);
  71
  72         /* Calle should have opened these */
  73         if (ctx->ct_tran_fd == -1 || ctx->ct_dev_fd == -1) {
  74                 err = EINVAL;
  75                 goto out;
  76         }
  77
  78         /*
  79          * This is the reader / reconnect loop.
  80          *
  81          * We could start with state "idle", but
  82          * we know someone wants a connection to
  83          * this server, so start in "vcactive".
  84          *
  85          * XXX: Add some syslog calls in here?
  86          */
  87         vcst = SMBIOD_ST_VCACTIVE;
  88
  89         for (;;) {
  90
  91                 switch (vcst) {
  92                 case SMBIOD_ST_IDLE:
  93                         /*
  94                          * Wait for driver requests to arrive
  95                          * for this VC, then return here.
  96                          * Next state is normally RECONNECT.
  97                          */
  98                         DPRINT("state: idle");
  99                         if (ioctl(ctx->ct_dev_fd,
 100                             SMBIOC_IOD_IDLE, &vcst) == -1) {
 101                                 err = errno;
 102                                 DPRINT("ioc_idle: err %d", err);
 103                                 goto out;
 104                         }
 105                         continue;
 106
 107                 case SMBIOD_ST_RECONNECT:
 108                         DPRINT("state: reconnect");
 109                         err = smb_iod_connect(ctx);
 110                         if (err == 0) {
 111                                 vcst = SMBIOD_ST_VCACTIVE;
 112                                 continue;
 113                         }
 114                         DPRINT("_iod_connect: err %d", err);
 115                         /*
 116                          * If the error was EAUTH, retry is
 117                          * not likely to succeed either, so
 118                          * just exit this thread.  The user
 119                          * will need to run smbutil to get
 120                          * a new thread with new auth info.
 121                          */
 122                         if (err == EAUTH)
 123                                 goto out;
 124                         vcst = SMBIOD_ST_RCFAILED;
 125                         continue;
 126
 127                 case SMBIOD_ST_RCFAILED:
 128                         DPRINT("state: rcfailed");
 129                         /*
 130                          * Reconnect failed.  Kill off any
 131                          * requests waiting in the driver,
 132                          * then get ready to try again.
 133                          * Next state is normally IDLE.
 134                          */
 135                         if (ioctl(ctx->ct_dev_fd,
 136                             SMBIOC_IOD_RCFAIL, &vcst) == -1) {
 137                                 err = errno;
 138                                 DPRINT("ioc_rcfail: err %d", err);
 139                                 goto out;
 140                         }
 141                         continue;
 142
 143                 case SMBIOD_ST_VCACTIVE:
 144                         DPRINT("state: active");
 145                         if (ioctl(ctx->ct_dev_fd,
 146                             SMBIOC_IOD_WORK, work) == -1) {
 147                                 err = errno;
 148                                 DPRINT("ioc_work: err %d", err);
 149                                 goto out;
 150                         }
 151                         vcst = work->wk_out_state;
 152                         /*
 153                          * Go ahead and close the transport now,
 154                          * rather than wait until reconnect to
 155                          * this server.
 156                          */
 157                         close(ctx->ct_tran_fd);
 158                         ctx->ct_tran_fd = -1;
 159                         continue;
 160
 161                 case SMBIOD_ST_DEAD:
 162                         DPRINT("state: dead");
 163                         err = 0;
 164                         goto out;
 165
 166                 default:
 167                         DPRINT("state: BAD(%d)", vcst);
 168                         err = EFAULT;
 169                         goto out;
 170                 }
 171         }
 172
 173 out:
 174         if (ctx->ct_tran_fd != -1) {
 175                 close(ctx->ct_tran_fd);
 176                 ctx->ct_tran_fd = -1;
 177         }
 178         if (ctx->ct_dev_fd != -1) {
 179                 close(ctx->ct_dev_fd);
 180                 ctx->ct_dev_fd = -1;
 181         }
 182
 183         return (err);
 184 }