1/* 2 Unix SMB/CIFS implementation. 3 4 POSIX NTVFS backend 5 6 Copyright (C) Andrew Tridgell 2004 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. 20*/ 21/* 22 this implements most of the POSIX NTVFS backend 23 This is the default backend 24*/ 25 26#include "includes.h" 27#include "vfs_posix.h" 28#include "librpc/gen_ndr/security.h" 29#include "../tdb/include/tdb.h" 30#include "tdb_wrap.h" 31#include "libcli/security/security.h" 32#include "lib/events/events.h" 33#include "param/param.h" 34 35/* 36 setup config options for a posix share 37*/ 38static void pvfs_setup_options(struct pvfs_state *pvfs) 39{ 40 struct share_config *scfg = pvfs->ntvfs->ctx->config; 41 const char *eadb; 42 43 if (share_bool_option(scfg, SHARE_MAP_HIDDEN, SHARE_MAP_HIDDEN_DEFAULT)) 44 pvfs->flags |= PVFS_FLAG_MAP_HIDDEN; 45 if (share_bool_option(scfg, SHARE_MAP_ARCHIVE, SHARE_MAP_ARCHIVE_DEFAULT)) 46 pvfs->flags |= PVFS_FLAG_MAP_ARCHIVE; 47 if (share_bool_option(scfg, SHARE_MAP_SYSTEM, SHARE_MAP_SYSTEM_DEFAULT)) 48 pvfs->flags |= PVFS_FLAG_MAP_SYSTEM; 49 if (share_bool_option(scfg, SHARE_READONLY, SHARE_READONLY_DEFAULT)) 50 pvfs->flags |= PVFS_FLAG_READONLY; 51 if (share_bool_option(scfg, SHARE_STRICT_SYNC, SHARE_STRICT_SYNC_DEFAULT)) 52 pvfs->flags |= PVFS_FLAG_STRICT_SYNC; 53 if (share_bool_option(scfg, SHARE_STRICT_LOCKING, SHARE_STRICT_LOCKING_DEFAULT)) 54 pvfs->flags |= PVFS_FLAG_STRICT_LOCKING; 55 if (share_bool_option(scfg, SHARE_CI_FILESYSTEM, SHARE_CI_FILESYSTEM_DEFAULT)) 56 pvfs->flags |= PVFS_FLAG_CI_FILESYSTEM; 57 if (share_bool_option(scfg, PVFS_FAKE_OPLOCKS, PVFS_FAKE_OPLOCKS_DEFAULT)) 58 pvfs->flags |= PVFS_FLAG_FAKE_OPLOCKS; 59 if (share_bool_option(scfg, PVFS_AIO, false)) 60 pvfs->flags |= PVFS_FLAG_LINUX_AIO; 61 62 /* file perm options */ 63 pvfs->options.create_mask = share_int_option(scfg, 64 SHARE_CREATE_MASK, 65 SHARE_CREATE_MASK_DEFAULT); 66 pvfs->options.dir_mask = share_int_option(scfg, 67 SHARE_DIR_MASK, 68 SHARE_DIR_MASK_DEFAULT); 69 pvfs->options.force_dir_mode = share_int_option(scfg, 70 SHARE_FORCE_DIR_MODE, 71 SHARE_FORCE_DIR_MODE_DEFAULT); 72 pvfs->options.force_create_mode = share_int_option(scfg, 73 SHARE_FORCE_CREATE_MODE, 74 SHARE_FORCE_CREATE_MODE_DEFAULT); 75 /* this must be a power of 2 */ 76 pvfs->alloc_size_rounding = share_int_option(scfg, 77 PVFS_ALLOCATION_ROUNDING, 78 PVFS_ALLOCATION_ROUNDING_DEFAULT); 79 80 pvfs->search.inactivity_time = share_int_option(scfg, 81 PVFS_SEARCH_INACTIVITY, 82 PVFS_SEARCH_INACTIVITY_DEFAULT); 83 84#if HAVE_XATTR_SUPPORT 85 if (share_bool_option(scfg, PVFS_XATTR, PVFS_XATTR_DEFAULT)) 86 pvfs->flags |= PVFS_FLAG_XATTR_ENABLE; 87#endif 88 89 pvfs->sharing_violation_delay = share_int_option(scfg, 90 PVFS_SHARE_DELAY, 91 PVFS_SHARE_DELAY_DEFAULT); 92 93 pvfs->oplock_break_timeout = share_int_option(scfg, 94 PVFS_OPLOCK_TIMEOUT, 95 PVFS_OPLOCK_TIMEOUT_DEFAULT); 96 97 pvfs->writetime_delay = share_int_option(scfg, 98 PVFS_WRITETIME_DELAY, 99 PVFS_WRITETIME_DELAY_DEFAULT); 100 101 pvfs->share_name = talloc_strdup(pvfs, scfg->name); 102 103 pvfs->fs_attribs = 104 FS_ATTR_CASE_SENSITIVE_SEARCH | 105 FS_ATTR_CASE_PRESERVED_NAMES | 106 FS_ATTR_UNICODE_ON_DISK | 107 FS_ATTR_SPARSE_FILES; 108 109 /* allow xattrs to be stored in a external tdb */ 110 eadb = share_string_option(scfg, PVFS_EADB, NULL); 111 if (eadb != NULL) { 112 pvfs->ea_db = tdb_wrap_open(pvfs, eadb, 50000, 113 TDB_DEFAULT, O_RDWR|O_CREAT, 0600); 114 if (pvfs->ea_db != NULL) { 115 pvfs->flags |= PVFS_FLAG_XATTR_ENABLE; 116 } else { 117 DEBUG(0,("Failed to open eadb '%s' - %s\n", 118 eadb, strerror(errno))); 119 pvfs->flags &= ~PVFS_FLAG_XATTR_ENABLE; 120 } 121 } 122 123 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) { 124 pvfs->fs_attribs |= FS_ATTR_NAMED_STREAMS; 125 } 126 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) { 127 pvfs->fs_attribs |= FS_ATTR_PERSISTANT_ACLS; 128 } 129 130 pvfs->sid_cache.creator_owner = dom_sid_parse_talloc(pvfs, SID_CREATOR_OWNER); 131 pvfs->sid_cache.creator_group = dom_sid_parse_talloc(pvfs, SID_CREATOR_GROUP); 132 133 /* check if the system really supports xattrs */ 134 if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) { 135 pvfs_xattr_probe(pvfs); 136 } 137 138 /* enable an ACL backend */ 139 pvfs->acl_ops = pvfs_acl_backend_byname(share_string_option(scfg, PVFS_ACL, "xattr")); 140} 141 142static int pvfs_state_destructor(struct pvfs_state *pvfs) 143{ 144 struct pvfs_file *f, *fn; 145 struct pvfs_search_state *s, *sn; 146 147 /* 148 * make sure we cleanup files and searches before anything else 149 * because there destructors need to acess the pvfs_state struct 150 */ 151 for (f=pvfs->files.list; f; f=fn) { 152 fn = f->next; 153 talloc_free(f); 154 } 155 156 for (s=pvfs->search.list; s; s=sn) { 157 sn = s->next; 158 talloc_free(s); 159 } 160 161 return 0; 162} 163 164/* 165 connect to a share - used when a tree_connect operation comes 166 in. For a disk based backend we needs to ensure that the base 167 directory exists (tho it doesn't need to be accessible by the user, 168 that comes later) 169*/ 170static NTSTATUS pvfs_connect(struct ntvfs_module_context *ntvfs, 171 struct ntvfs_request *req, 172 union smb_tcon* tcon) 173{ 174 struct pvfs_state *pvfs; 175 struct stat st; 176 char *base_directory; 177 NTSTATUS status; 178 const char *sharename; 179 180 switch (tcon->generic.level) { 181 case RAW_TCON_TCON: 182 sharename = tcon->tcon.in.service; 183 break; 184 case RAW_TCON_TCONX: 185 sharename = tcon->tconx.in.path; 186 break; 187 case RAW_TCON_SMB2: 188 sharename = tcon->smb2.in.path; 189 break; 190 default: 191 return NT_STATUS_INVALID_LEVEL; 192 } 193 194 if (strncmp(sharename, "\\\\", 2) == 0) { 195 char *p = strchr(sharename+2, '\\'); 196 if (p) { 197 sharename = p + 1; 198 } 199 } 200 201 /* 202 * TODO: call this from ntvfs_posix_init() 203 * but currently we don't have a lp_ctx there 204 */ 205 status = pvfs_acl_init(ntvfs->ctx->lp_ctx); 206 NT_STATUS_NOT_OK_RETURN(status); 207 208 pvfs = talloc_zero(ntvfs, struct pvfs_state); 209 NT_STATUS_HAVE_NO_MEMORY(pvfs); 210 211 /* for simplicity of path construction, remove any trailing slash now */ 212 base_directory = talloc_strdup(pvfs, share_string_option(ntvfs->ctx->config, SHARE_PATH, "")); 213 NT_STATUS_HAVE_NO_MEMORY(base_directory); 214 if (strcmp(base_directory, "/") != 0) { 215 trim_string(base_directory, NULL, "/"); 216 } 217 218 pvfs->ntvfs = ntvfs; 219 pvfs->base_directory = base_directory; 220 221 /* the directory must exist. Note that we deliberately don't 222 check that it is readable */ 223 if (stat(pvfs->base_directory, &st) != 0 || !S_ISDIR(st.st_mode)) { 224 DEBUG(0,("pvfs_connect: '%s' is not a directory, when connecting to [%s]\n", 225 pvfs->base_directory, sharename)); 226 return NT_STATUS_BAD_NETWORK_NAME; 227 } 228 229 ntvfs->ctx->fs_type = talloc_strdup(ntvfs->ctx, "NTFS"); 230 NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->fs_type); 231 232 ntvfs->ctx->dev_type = talloc_strdup(ntvfs->ctx, "A:"); 233 NT_STATUS_HAVE_NO_MEMORY(ntvfs->ctx->dev_type); 234 235 if (tcon->generic.level == RAW_TCON_TCONX) { 236 tcon->tconx.out.fs_type = ntvfs->ctx->fs_type; 237 tcon->tconx.out.dev_type = ntvfs->ctx->dev_type; 238 } 239 240 ntvfs->private_data = pvfs; 241 242 pvfs->brl_context = brl_init(pvfs, 243 pvfs->ntvfs->ctx->server_id, 244 pvfs->ntvfs->ctx->lp_ctx, 245 pvfs->ntvfs->ctx->msg_ctx); 246 if (pvfs->brl_context == NULL) { 247 return NT_STATUS_INTERNAL_DB_CORRUPTION; 248 } 249 250 pvfs->odb_context = odb_init(pvfs, pvfs->ntvfs->ctx); 251 if (pvfs->odb_context == NULL) { 252 return NT_STATUS_INTERNAL_DB_CORRUPTION; 253 } 254 255 /* allow this to be NULL - we just disable change notify */ 256 pvfs->notify_context = notify_init(pvfs, 257 pvfs->ntvfs->ctx->server_id, 258 pvfs->ntvfs->ctx->msg_ctx, 259 pvfs->ntvfs->ctx->lp_ctx, 260 pvfs->ntvfs->ctx->event_ctx, 261 pvfs->ntvfs->ctx->config); 262 263 pvfs->wbc_ctx = wbc_init(pvfs, 264 pvfs->ntvfs->ctx->msg_ctx, 265 pvfs->ntvfs->ctx->event_ctx); 266 if (pvfs->wbc_ctx == NULL) { 267 return NT_STATUS_INTERNAL_DB_CORRUPTION; 268 } 269 270 /* allocate the search handle -> ptr tree */ 271 pvfs->search.idtree = idr_init(pvfs); 272 NT_STATUS_HAVE_NO_MEMORY(pvfs->search.idtree); 273 274 status = pvfs_mangle_init(pvfs); 275 NT_STATUS_NOT_OK_RETURN(status); 276 277 pvfs_setup_options(pvfs); 278 279 talloc_set_destructor(pvfs, pvfs_state_destructor); 280 281#ifdef SIGXFSZ 282 /* who had the stupid idea to generate a signal on a large 283 file write instead of just failing it!? */ 284 BlockSignals(true, SIGXFSZ); 285#endif 286 287 return NT_STATUS_OK; 288} 289 290/* 291 disconnect from a share 292*/ 293static NTSTATUS pvfs_disconnect(struct ntvfs_module_context *ntvfs) 294{ 295 return NT_STATUS_OK; 296} 297 298/* 299 check if a directory exists 300*/ 301static NTSTATUS pvfs_chkpath(struct ntvfs_module_context *ntvfs, 302 struct ntvfs_request *req, 303 union smb_chkpath *cp) 304{ 305 struct pvfs_state *pvfs = talloc_get_type(ntvfs->private_data, 306 struct pvfs_state); 307 struct pvfs_filename *name; 308 NTSTATUS status; 309 310 /* resolve the cifs name to a posix name */ 311 status = pvfs_resolve_name(pvfs, req, cp->chkpath.in.path, 0, &name); 312 NT_STATUS_NOT_OK_RETURN(status); 313 314 if (!name->exists) { 315 return NT_STATUS_OBJECT_NAME_NOT_FOUND; 316 } 317 318 if (!S_ISDIR(name->st.st_mode)) { 319 return NT_STATUS_NOT_A_DIRECTORY; 320 } 321 322 return NT_STATUS_OK; 323} 324 325/* 326 copy a set of files 327*/ 328static NTSTATUS pvfs_copy(struct ntvfs_module_context *ntvfs, 329 struct ntvfs_request *req, struct smb_copy *cp) 330{ 331 DEBUG(0,("pvfs_copy not implemented\n")); 332 return NT_STATUS_NOT_SUPPORTED; 333} 334 335/* 336 return print queue info 337*/ 338static NTSTATUS pvfs_lpq(struct ntvfs_module_context *ntvfs, 339 struct ntvfs_request *req, union smb_lpq *lpq) 340{ 341 return NT_STATUS_NOT_SUPPORTED; 342} 343 344/* SMBtrans - not used on file shares */ 345static NTSTATUS pvfs_trans(struct ntvfs_module_context *ntvfs, 346 struct ntvfs_request *req, struct smb_trans2 *trans2) 347{ 348 return NT_STATUS_ACCESS_DENIED; 349} 350 351/* 352 initialialise the POSIX disk backend, registering ourselves with the ntvfs subsystem 353 */ 354NTSTATUS ntvfs_posix_init(void) 355{ 356 NTSTATUS ret; 357 struct ntvfs_ops ops; 358 NTVFS_CURRENT_CRITICAL_SIZES(vers); 359 360 ZERO_STRUCT(ops); 361 362 ops.type = NTVFS_DISK; 363 364 /* fill in all the operations */ 365 ops.connect = pvfs_connect; 366 ops.disconnect = pvfs_disconnect; 367 ops.unlink = pvfs_unlink; 368 ops.chkpath = pvfs_chkpath; 369 ops.qpathinfo = pvfs_qpathinfo; 370 ops.setpathinfo = pvfs_setpathinfo; 371 ops.open = pvfs_open; 372 ops.mkdir = pvfs_mkdir; 373 ops.rmdir = pvfs_rmdir; 374 ops.rename = pvfs_rename; 375 ops.copy = pvfs_copy; 376 ops.ioctl = pvfs_ioctl; 377 ops.read = pvfs_read; 378 ops.write = pvfs_write; 379 ops.seek = pvfs_seek; 380 ops.flush = pvfs_flush; 381 ops.close = pvfs_close; 382 ops.exit = pvfs_exit; 383 ops.lock = pvfs_lock; 384 ops.setfileinfo = pvfs_setfileinfo; 385 ops.qfileinfo = pvfs_qfileinfo; 386 ops.fsinfo = pvfs_fsinfo; 387 ops.lpq = pvfs_lpq; 388 ops.search_first = pvfs_search_first; 389 ops.search_next = pvfs_search_next; 390 ops.search_close = pvfs_search_close; 391 ops.trans = pvfs_trans; 392 ops.logoff = pvfs_logoff; 393 ops.async_setup = pvfs_async_setup; 394 ops.cancel = pvfs_cancel; 395 ops.notify = pvfs_notify; 396 397 /* register ourselves with the NTVFS subsystem. We register 398 under the name 'default' as we wish to be the default 399 backend, and also register as 'posix' */ 400 ops.name = "default"; 401 ret = ntvfs_register(&ops, &vers); 402 403 if (!NT_STATUS_IS_OK(ret)) { 404 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name)); 405 } 406 407 ops.name = "posix"; 408 ret = ntvfs_register(&ops, &vers); 409 410 if (!NT_STATUS_IS_OK(ret)) { 411 DEBUG(0,("Failed to register POSIX backend as '%s'!\n", ops.name)); 412 } 413 414 if (NT_STATUS_IS_OK(ret)) { 415 ret = ntvfs_common_init(); 416 } 417 418 return ret; 419} 420