usr/src/cmd/smbsrv/smbd/smbd_share_doorsvc.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  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  24  */
  25
  26 /*
  27  * LanMan share door server
  28  */
  29
  30 #include <door.h>
  31 #include <unistd.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <fcntl.h>
  35 #include <errno.h>
  36 #include <syslog.h>
  37 #include <string.h>
  38 #include <strings.h>
  39 #include <pthread.h>
  40 #include <smbsrv/libsmb.h>
  41 #include <smbsrv/smb_share.h>
  42 #include <smbsrv/smbinfo.h>
  43 #include "smbd.h"
  44
  45 #define SMB_SHARE_DSRV_VERSION  1
  46 #define SMB_SHARE_DSRV_COOKIE   ((void*)(0xdeadbeef^SMB_SHARE_DSRV_VERSION))
  47
  48 static int smb_share_dsrv_fd = -1;
  49 static pthread_mutex_t smb_share_dsrv_mtx = PTHREAD_MUTEX_INITIALIZER;
  50 static smbd_door_t smb_share_sdh;
  51
  52 static void smbd_share_dispatch(void *, char *, size_t, door_desc_t *, uint_t);
  53
  54 /*
  55  * Start the LanMan share door service.
  56  * Returns 0 on success. Otherwise, -1.
  57  */
  58 int
  59 smbd_share_start(void)
  60 {
  61         int             newfd;
  62         const char      *door_name;
  63
  64         (void) pthread_mutex_lock(&smb_share_dsrv_mtx);
  65
  66         if (smb_share_dsrv_fd != -1) {
  67                 syslog(LOG_ERR, "smbd_share_start: duplicate");
  68                 (void) pthread_mutex_unlock(&smb_share_dsrv_mtx);
  69                 return (smb_share_dsrv_fd);
  70         }
  71
  72         smbd_door_init(&smb_share_sdh, "share");
  73
  74         if ((smb_share_dsrv_fd = door_create(smbd_share_dispatch,
  75             SMB_SHARE_DSRV_COOKIE, (DOOR_UNREF | DOOR_REFUSE_DESC))) < 0) {
  76                 syslog(LOG_ERR, "smbd_share_start: door_create: %s",
  77                     strerror(errno));
  78                 (void) pthread_mutex_unlock(&smb_share_dsrv_mtx);
  79                 return (-1);
  80         }
  81
  82         door_name = getenv("SMB_SHARE_DNAME");
  83         if (door_name == NULL)
  84                 door_name = SMB_SHARE_DNAME;
  85
  86         (void) unlink(door_name);
  87
  88         if ((newfd = creat(door_name, 0644)) < 0) {
  89                 syslog(LOG_ERR, "smbd_share_start: open: %s",
  90                     strerror(errno));
  91                 (void) door_revoke(smb_share_dsrv_fd);
  92                 smb_share_dsrv_fd = -1;
  93                 (void) pthread_mutex_unlock(&smb_share_dsrv_mtx);
  94                 return (-1);
  95         }
  96
  97         (void) close(newfd);
  98         (void) fdetach(door_name);
  99
 100         if (fattach(smb_share_dsrv_fd, door_name) < 0) {
 101                 syslog(LOG_ERR, "smbd_share_start: fattach: %s",
 102                     strerror(errno));
 103                 (void) door_revoke(smb_share_dsrv_fd);
 104                 smb_share_dsrv_fd = -1;
 105                 (void) pthread_mutex_unlock(&smb_share_dsrv_mtx);
 106                 return (-1);
 107         }
 108
 109         (void) pthread_mutex_unlock(&smb_share_dsrv_mtx);
 110         return (smb_share_dsrv_fd);
 111 }
 112
 113 /*
 114  * Stop the LanMan share door service.
 115  */
 116 void
 117 smbd_share_stop(void)
 118 {
 119         (void) pthread_mutex_lock(&smb_share_dsrv_mtx);
 120
 121         smbd_door_fini(&smb_share_sdh);
 122
 123         if (smb_share_dsrv_fd != -1) {
 124                 const char *door_name;
 125
 126                 door_name = getenv("SMB_SHARE_DNAME");
 127                 if (door_name == NULL)
 128                         door_name = SMB_SHARE_DNAME;
 129                 (void) fdetach(door_name);
 130                 (void) door_revoke(smb_share_dsrv_fd);
 131                 smb_share_dsrv_fd = -1;
 132         }
 133
 134         (void) pthread_mutex_unlock(&smb_share_dsrv_mtx);
 135 }
 136
 137 /*
 138  * This function with which the LMSHARE door is associated
 139  * will invoke the appropriate CIFS share management function
 140  * based on the request type of the door call.
 141  */
 142 /*ARGSUSED*/
 143 static void
 144 smbd_share_dispatch(void *cookie, char *ptr, size_t size, door_desc_t *dp,
 145     uint_t n_desc)
 146 {
 147         uint32_t rc;
 148         int req_type;
 149         char buf[SMB_SHARE_DSIZE];
 150         unsigned int used;
 151         smb_dr_ctx_t *dec_ctx;
 152         smb_dr_ctx_t *enc_ctx;
 153         unsigned int dec_status;
 154         unsigned int enc_status;
 155         char *sharename, *sharename2;
 156         smb_share_t lmshr_info;
 157         smb_shrlist_t lmshr_list;
 158         int offset;
 159
 160         smbd_door_enter(&smb_share_sdh);
 161
 162         if ((cookie != SMB_SHARE_DSRV_COOKIE) || (ptr == NULL) ||
 163             (size < sizeof (uint32_t))) {
 164                 smbd_door_return(&smb_share_sdh, NULL, 0, NULL, 0);
 165         }
 166
 167         dec_ctx = smb_dr_decode_start(ptr, size);
 168         enc_ctx = smb_dr_encode_start(buf, sizeof (buf));
 169         req_type = smb_dr_get_uint32(dec_ctx);
 170
 171         switch (req_type) {
 172         case SMB_SHROP_NUM_SHARES:
 173                 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0)
 174                         goto decode_error;
 175
 176                 rc = smb_shr_count();
 177                 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS);
 178                 smb_dr_put_uint32(enc_ctx, rc);
 179                 break;
 180
 181         case SMB_SHROP_DELETE:
 182                 sharename = smb_dr_get_string(dec_ctx);
 183
 184                 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) {
 185                         smb_dr_free_string(sharename);
 186                         goto decode_error;
 187                 }
 188
 189                 rc = smb_shr_remove(sharename);
 190                 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS);
 191                 smb_dr_put_uint32(enc_ctx, rc);
 192                 smb_dr_free_string(sharename);
 193                 break;
 194
 195         case SMB_SHROP_RENAME:
 196                 sharename = smb_dr_get_string(dec_ctx);
 197                 sharename2 = smb_dr_get_string(dec_ctx);
 198
 199                 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) {
 200                         smb_dr_free_string(sharename);
 201                         smb_dr_free_string(sharename2);
 202                         goto decode_error;
 203                 }
 204
 205                 rc = smb_shr_rename(sharename, sharename2);
 206                 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS);
 207                 smb_dr_put_uint32(enc_ctx, rc);
 208                 smb_dr_free_string(sharename);
 209                 smb_dr_free_string(sharename2);
 210                 break;
 211
 212         case SMB_SHROP_ADD:
 213                 smb_dr_get_share(dec_ctx, &lmshr_info);
 214                 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0)
 215                         goto decode_error;
 216
 217                 rc = smb_shr_add(&lmshr_info);
 218                 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS);
 219                 smb_dr_put_uint32(enc_ctx, rc);
 220                 smb_dr_put_share(enc_ctx, &lmshr_info);
 221                 break;
 222
 223         case SMB_SHROP_MODIFY:
 224                 smb_dr_get_share(dec_ctx, &lmshr_info);
 225                 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) {
 226                         goto decode_error;
 227                 }
 228
 229                 rc = smb_shr_modify(&lmshr_info);
 230                 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS);
 231                 smb_dr_put_uint32(enc_ctx, rc);
 232
 233                 break;
 234
 235         case SMB_SHROP_LIST:
 236                 offset = smb_dr_get_int32(dec_ctx);
 237                 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0)
 238                         goto decode_error;
 239
 240                 smb_shr_list(offset, &lmshr_list);
 241                 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS);
 242                 smb_dr_put_buf(enc_ctx, (unsigned char *)&lmshr_list,
 243                     sizeof (smb_shrlist_t));
 244                 break;
 245
 246         default:
 247                 dec_status = smb_dr_decode_finish(dec_ctx);
 248                 goto decode_error;
 249         }
 250
 251         if ((enc_status = smb_dr_encode_finish(enc_ctx, &used)) != 0) {
 252                 enc_ctx = smb_dr_encode_start(buf, sizeof (buf));
 253                 smb_dr_put_int32(enc_ctx, SMB_SHARE_DERROR);
 254                 smb_dr_put_uint32(enc_ctx, enc_status);
 255                 (void) smb_dr_encode_finish(enc_ctx, &used);
 256         }
 257
 258         smbd_door_return(&smb_share_sdh, buf, used, NULL, 0);
 259         return;
 260
 261 decode_error:
 262         smb_dr_put_int32(enc_ctx, SMB_SHARE_DERROR);
 263         smb_dr_put_uint32(enc_ctx, dec_status);
 264         (void) smb_dr_encode_finish(enc_ctx, &used);
 265         smbd_door_return(&smb_share_sdh, buf, used, NULL, 0);
 266 }