Changeset 988 for vendor/current/source3/smbd/conn.c
- Timestamp:
- Nov 24, 2016, 1:14:11 PM (9 years ago)
- File:
-
- 1 edited
-
vendor/current/source3/smbd/conn.c (modified) (9 diffs)
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- Unmodified
- Added
- Removed
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vendor/current/source3/smbd/conn.c
r919 r988 23 23 #include "smbd/smbd.h" 24 24 #include "smbd/globals.h" 25 #include "rpc_server/rpc_ncacn_np.h"26 25 #include "lib/util/bitmap.h" 27 28 /* The connections bitmap is expanded in increments of BITMAP_BLOCK_SZ. The29 * maximum size of the bitmap is the largest positive integer, but you will hit30 * the "max connections" limit, looong before that.31 */32 33 #define BITMAP_BLOCK_SZ 12834 35 /****************************************************************************36 Init the conn structures.37 ****************************************************************************/38 39 void conn_init(struct smbd_server_connection *sconn)40 {41 sconn->smb1.tcons.Connections = NULL;42 sconn->smb1.tcons.bmap = bitmap_talloc(sconn, BITMAP_BLOCK_SZ);43 }44 26 45 27 /**************************************************************************** … … 49 31 int conn_num_open(struct smbd_server_connection *sconn) 50 32 { 51 return sconn->num_ tcons_open;33 return sconn->num_connections; 52 34 } 53 35 … … 56 38 ****************************************************************************/ 57 39 58 bool conn_snum_used(int snum) 40 bool conn_snum_used(struct smbd_server_connection *sconn, 41 int snum) 59 42 { 60 struct smbd_server_connection *sconn = smbd_server_conn;43 struct connection_struct *conn; 61 44 62 if (sconn->using_smb2) { 63 /* SMB2 */ 64 struct smbd_smb2_session *sess; 65 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) { 66 struct smbd_smb2_tcon *ptcon; 67 68 for (ptcon = sess->tcons.list; ptcon; ptcon = ptcon->next) { 69 if (ptcon->compat_conn && 70 ptcon->compat_conn->params && 71 (ptcon->compat_conn->params->service == snum)) { 72 return true; 73 } 74 } 75 } 76 } else { 77 /* SMB1 */ 78 connection_struct *conn; 79 for (conn=sconn->smb1.tcons.Connections;conn;conn=conn->next) { 80 if (conn->params->service == snum) { 81 return true; 82 } 83 } 84 } 85 return false; 86 } 87 88 /**************************************************************************** 89 Find a conn given a cnum. 90 ****************************************************************************/ 91 92 connection_struct *conn_find(struct smbd_server_connection *sconn,unsigned cnum) 93 { 94 if (sconn->using_smb2) { 95 /* SMB2 */ 96 struct smbd_smb2_session *sess; 97 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) { 98 struct smbd_smb2_tcon *ptcon; 99 100 for (ptcon = sess->tcons.list; ptcon; ptcon = ptcon->next) { 101 if (ptcon->compat_conn && 102 ptcon->compat_conn->cnum == cnum) { 103 return ptcon->compat_conn; 104 } 105 } 106 } 107 } else { 108 /* SMB1 */ 109 int count=0; 110 connection_struct *conn; 111 for (conn=sconn->smb1.tcons.Connections;conn;conn=conn->next,count++) { 112 if (conn->cnum == cnum) { 113 if (count > 10) { 114 DLIST_PROMOTE(sconn->smb1.tcons.Connections, 115 conn); 116 } 117 return conn; 118 } 45 for (conn=sconn->connections; conn; conn=conn->next) { 46 if (conn->params->service == snum) { 47 return true; 119 48 } 120 49 } 121 50 122 return NULL;51 return false; 123 52 } 124 53 … … 132 61 { 133 62 connection_struct *conn; 134 int i;135 int find_offset = 1;136 63 137 if (sconn->using_smb2) { 138 /* SMB2 */ 139 if (!(conn=TALLOC_ZERO_P(NULL, connection_struct)) || 140 !(conn->params = TALLOC_P(conn, struct share_params))) { 141 DEBUG(0,("TALLOC_ZERO() failed!\n")); 142 TALLOC_FREE(conn); 143 return NULL; 144 } 145 conn->sconn = sconn; 146 return conn; 147 } 148 149 /* SMB1 */ 150 find_again: 151 i = bitmap_find(sconn->smb1.tcons.bmap, find_offset); 152 153 if (i == -1) { 154 /* Expand the connections bitmap. */ 155 int oldsz = sconn->smb1.tcons.bmap->n; 156 int newsz = sconn->smb1.tcons.bmap->n + 157 BITMAP_BLOCK_SZ; 158 struct bitmap * nbmap; 159 160 if (newsz <= oldsz) { 161 /* Integer wrap. */ 162 DEBUG(0,("ERROR! Out of connection structures\n")); 163 return NULL; 164 } 165 166 DEBUG(4,("resizing connections bitmap from %d to %d\n", 167 oldsz, newsz)); 168 169 nbmap = bitmap_talloc(sconn, newsz); 170 if (!nbmap) { 171 DEBUG(0,("ERROR! malloc fail.\n")); 172 return NULL; 173 } 174 175 bitmap_copy(nbmap, sconn->smb1.tcons.bmap); 176 TALLOC_FREE(sconn->smb1.tcons.bmap); 177 178 sconn->smb1.tcons.bmap = nbmap; 179 find_offset = oldsz; /* Start next search in the new portion. */ 180 181 goto find_again; 182 } 183 184 /* The bitmap position is used below as the connection number 185 * conn->cnum). This ends up as the TID field in the SMB header, 186 * which is limited to 16 bits (we skip 0xffff which is the 187 * NULL TID). 188 */ 189 if (i > 65534) { 190 DEBUG(0, ("Maximum connection limit reached\n")); 191 return NULL; 192 } 193 194 if (!(conn=TALLOC_ZERO_P(NULL, connection_struct)) || 195 !(conn->params = TALLOC_P(conn, struct share_params))) { 64 if (!(conn=talloc_zero(NULL, connection_struct)) || 65 !(conn->params = talloc(conn, struct share_params)) || 66 !(conn->vuid_cache = talloc_zero(conn, struct vuid_cache)) || 67 !(conn->connectpath = talloc_strdup(conn, "")) || 68 !(conn->origpath = talloc_strdup(conn, ""))) { 196 69 DEBUG(0,("TALLOC_ZERO() failed!\n")); 197 70 TALLOC_FREE(conn); … … 199 72 } 200 73 conn->sconn = sconn; 201 conn->cnum = i;202 74 conn->force_group_gid = (gid_t)-1; 203 75 204 bitmap_set(sconn->smb1.tcons.bmap, i); 205 206 sconn->num_tcons_open++; 207 208 string_set(&conn->connectpath,""); 209 string_set(&conn->origpath,""); 210 211 DLIST_ADD(sconn->smb1.tcons.Connections, conn); 76 DLIST_ADD(sconn->connections, conn); 77 sconn->num_connections++; 212 78 213 79 return conn; … … 215 81 216 82 /**************************************************************************** 217 Close all conn structures. 218 Return true if any were closed. 83 Clear a vuid out of the connection's vuid cache 219 84 ****************************************************************************/ 220 85 221 bool conn_close_all(struct smbd_server_connection *sconn)86 static void conn_clear_vuid_cache(connection_struct *conn, uint64_t vuid) 222 87 { 223 bool ret = false; 224 if (sconn->using_smb2) { 225 /* SMB2 */ 226 struct smbd_smb2_session *sess; 227 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) { 228 struct smbd_smb2_tcon *tcon, *tc_next; 88 int i; 229 89 230 for (tcon = sess->tcons.list; tcon; tcon = tc_next) { 231 tc_next = tcon->next; 232 TALLOC_FREE(tcon); 233 ret = true; 90 for (i=0; i<VUID_CACHE_SIZE; i++) { 91 struct vuid_cache_entry *ent; 92 93 ent = &conn->vuid_cache->array[i]; 94 95 if (ent->vuid == vuid) { 96 ent->vuid = UID_FIELD_INVALID; 97 /* 98 * We need to keep conn->session_info around 99 * if it's equal to ent->session_info as a SMBulogoff 100 * is often followed by a SMBtdis (with an invalid 101 * vuid). The debug code (or regular code in 102 * vfs_full_audit) wants to refer to the 103 * conn->session_info pointer to print debug 104 * statements. Theoretically this is a bug, 105 * as once the vuid is gone the session_info 106 * on the conn struct isn't valid any more, 107 * but there's enough code that assumes 108 * conn->session_info is never null that 109 * it's easier to hold onto the old pointer 110 * until we get a new sessionsetupX. 111 * As everything is hung off the 112 * conn pointer as a talloc context we're not 113 * leaking memory here. See bug #6315. JRA. 114 */ 115 if (conn->session_info == ent->session_info) { 116 ent->session_info = NULL; 117 } else { 118 TALLOC_FREE(ent->session_info); 234 119 } 235 } 236 } else { 237 /* SMB1 */ 238 connection_struct *conn, *next; 239 240 for (conn=sconn->smb1.tcons.Connections;conn;conn=next) { 241 next=conn->next; 242 set_current_service(conn, 0, True); 243 close_cnum(conn, conn->vuid); 244 ret = true; 245 } 246 } 247 return ret; 248 } 249 250 /**************************************************************************** 251 Update last used timestamps. 252 ****************************************************************************/ 253 254 static void conn_lastused_update(struct smbd_server_connection *sconn,time_t t) 255 { 256 if (sconn->using_smb2) { 257 /* SMB2 */ 258 struct smbd_smb2_session *sess; 259 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) { 260 struct smbd_smb2_tcon *ptcon; 261 262 for (ptcon = sess->tcons.list; ptcon; ptcon = ptcon->next) { 263 connection_struct *conn = ptcon->compat_conn; 264 /* Update if connection wasn't idle. */ 265 if (conn && conn->lastused != conn->lastused_count) { 266 conn->lastused = t; 267 conn->lastused_count = t; 268 } 269 } 270 } 271 } else { 272 /* SMB1 */ 273 connection_struct *conn; 274 for (conn=sconn->smb1.tcons.Connections;conn;conn=conn->next) { 275 /* Update if connection wasn't idle. */ 276 if (conn->lastused != conn->lastused_count) { 277 conn->lastused = t; 278 conn->lastused_count = t; 279 } 120 ent->read_only = False; 121 ent->share_access = 0; 280 122 } 281 123 } … … 283 125 284 126 /**************************************************************************** 285 Idle inactive connections. 127 Clear a vuid out of the validity cache, and as the 'owner' of a connection. 128 129 Called from invalidate_vuid() 286 130 ****************************************************************************/ 287 131 288 bool conn_idle_all(struct smbd_server_connection *sconn, time_t t) 289 { 290 int deadtime = lp_deadtime()*60; 291 292 conn_lastused_update(sconn, t); 293 294 if (deadtime <= 0) { 295 deadtime = DEFAULT_SMBD_TIMEOUT; 296 } 297 298 if (sconn->using_smb2) { 299 /* SMB2 */ 300 struct smbd_smb2_session *sess; 301 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) { 302 struct smbd_smb2_tcon *ptcon; 303 304 for (ptcon = sess->tcons.list; ptcon; ptcon = ptcon->next) { 305 time_t age; 306 connection_struct *conn = ptcon->compat_conn; 307 308 if (conn == NULL) { 309 continue; 310 } 311 312 age = t - conn->lastused; 313 /* close dirptrs on connections that are idle */ 314 if (age > DPTR_IDLE_TIMEOUT) { 315 dptr_idlecnum(conn); 316 } 317 318 if (conn->num_files_open > 0 || age < deadtime) { 319 return false; 320 } 321 } 322 } 323 } else { 324 /* SMB1 */ 325 connection_struct *conn; 326 for (conn=sconn->smb1.tcons.Connections;conn;conn=conn->next) { 327 time_t age = t - conn->lastused; 328 329 /* close dirptrs on connections that are idle */ 330 if (age > DPTR_IDLE_TIMEOUT) { 331 dptr_idlecnum(conn); 332 } 333 334 if (conn->num_files_open > 0 || age < deadtime) { 335 return false; 336 } 337 } 338 } 339 340 /* 341 * Check all pipes for any open handles. We cannot 342 * idle with a handle open. 343 */ 344 if (check_open_pipes()) { 345 return false; 346 } 347 348 return true; 349 } 350 351 /**************************************************************************** 352 Clear a vuid out of the validity cache, and as the 'owner' of a connection. 353 ****************************************************************************/ 354 355 void conn_clear_vuid_caches(struct smbd_server_connection *sconn,uint16_t vuid) 132 void conn_clear_vuid_caches(struct smbd_server_connection *sconn, uint64_t vuid) 356 133 { 357 134 connection_struct *conn; 358 135 359 if (sconn->using_smb2) { 360 /* SMB2 */ 361 struct smbd_smb2_session *sess; 362 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) { 363 struct smbd_smb2_tcon *ptcon; 364 365 for (ptcon = sess->tcons.list; ptcon; ptcon = ptcon->next) { 366 if (ptcon->compat_conn) { 367 if (ptcon->compat_conn->vuid == vuid) { 368 ptcon->compat_conn->vuid = UID_FIELD_INVALID; 369 } 370 conn_clear_vuid_cache(ptcon->compat_conn, vuid); 371 } 372 } 136 for (conn=sconn->connections; conn;conn=conn->next) { 137 if (conn->vuid == vuid) { 138 conn->vuid = UID_FIELD_INVALID; 373 139 } 374 } else { 375 /* SMB1 */ 376 for (conn=sconn->smb1.tcons.Connections;conn;conn=conn->next) { 377 if (conn->vuid == vuid) { 378 conn->vuid = UID_FIELD_INVALID; 379 } 380 conn_clear_vuid_cache(conn, vuid); 381 } 140 conn_clear_vuid_cache(conn, vuid); 382 141 } 383 142 } … … 414 173 free_namearray(conn->aio_write_behind_list); 415 174 416 string_free(&conn->connectpath);417 string_free(&conn->origpath);418 419 175 ZERO_STRUCTP(conn); 420 176 talloc_destroy(conn); … … 432 188 } 433 189 434 if (conn->sconn->using_smb2) { 435 /* SMB2 */ 436 conn_free_internal(conn); 437 return; 438 } 439 440 /* SMB1 */ 441 DLIST_REMOVE(conn->sconn->smb1.tcons.Connections, conn); 442 443 if (conn->sconn->smb1.tcons.bmap != NULL) { 444 /* 445 * Can be NULL for fake connections created by 446 * create_conn_struct() 447 */ 448 bitmap_clear(conn->sconn->smb1.tcons.bmap, conn->cnum); 449 } 450 451 SMB_ASSERT(conn->sconn->num_tcons_open > 0); 452 conn->sconn->num_tcons_open--; 190 DLIST_REMOVE(conn->sconn->connections, conn); 191 SMB_ASSERT(conn->sconn->num_connections > 0); 192 conn->sconn->num_connections--; 453 193 454 194 conn_free_internal(conn); 455 195 } 456 457 /****************************************************************************458 Receive a smbcontrol message to forcibly unmount a share.459 The message contains just a share name and all instances of that460 share are unmounted.461 The special sharename '*' forces unmount of all shares.462 ****************************************************************************/463 464 void msg_force_tdis(struct messaging_context *msg,465 void *private_data,466 uint32_t msg_type,467 struct server_id server_id,468 DATA_BLOB *data)469 {470 struct smbd_server_connection *sconn;471 connection_struct *conn, *next;472 fstring sharename;473 474 sconn = msg_ctx_to_sconn(msg);475 if (sconn == NULL) {476 DEBUG(1, ("could not find sconn\n"));477 return;478 }479 480 fstrcpy(sharename, (const char *)data->data);481 482 if (strcmp(sharename, "*") == 0) {483 DEBUG(1,("Forcing close of all shares\n"));484 conn_close_all(sconn);485 goto done;486 }487 488 if (sconn->using_smb2) {489 /* SMB2 */490 struct smbd_smb2_session *sess;491 for (sess = sconn->smb2.sessions.list; sess; sess = sess->next) {492 struct smbd_smb2_tcon *tcon, *tc_next;493 494 for (tcon = sess->tcons.list; tcon; tcon = tc_next) {495 tc_next = tcon->next;496 if (tcon->compat_conn &&497 strequal(lp_servicename(SNUM(tcon->compat_conn)),498 sharename)) {499 DEBUG(1,("Forcing close of share %s cnum=%d\n",500 sharename, tcon->compat_conn->cnum));501 TALLOC_FREE(tcon);502 }503 }504 }505 } else {506 /* SMB1 */507 for (conn=sconn->smb1.tcons.Connections;conn;conn=next) {508 next=conn->next;509 if (strequal(lp_servicename(SNUM(conn)), sharename)) {510 DEBUG(1,("Forcing close of share %s cnum=%d\n",511 sharename, conn->cnum));512 close_cnum(conn, (uint16)-1);513 }514 }515 }516 517 done:518 519 change_to_root_user();520 reload_services(msg, -1, true);521 }
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