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 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_SDEV_IMPL_H 27 #define _SYS_SDEV_IMPL_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 #include <rpc/rpc.h> 36 #include <sys/dirent.h> 37 #include <sys/vfs.h> 38 #include <sys/vfs_opreg.h> 39 #include <sys/list.h> 40 #include <sys/nvpair.h> 41 42 /* 43 * sdev_nodes are the file-system specific part of the 44 * vnodes for the device filesystem. 45 * 46 * The device filesystem exports two node types: 47 * 48 * VDIR nodes to represent directories 49 * VCHR & VBLK nodes to represent devices 50 */ 51 52 /* 53 * /dev mount arguments 54 */ 55 struct sdev_mountargs { 56 uint64_t sdev_attrdir; 57 }; 58 59 60 /* 61 * Nvpair names of profile information (list of device files available) of 62 * non-global /dev mounts. These strings must be unique among them. 63 */ 64 #define SDEV_NVNAME_MOUNTPT "prof_mountpt" 65 #define SDEV_NVNAME_INCLUDE "prof_include" 66 #define SDEV_NVNAME_EXCLUDE "prof_exclude" 67 #define SDEV_NVNAME_SYMLINK "prof_symlink" 68 #define SDEV_NVNAME_MAP "prof_map" 69 70 /* 71 * supported devfsadm_cmd 72 */ 73 #define DEVFSADMD_RUN_ALL 1 74 #define DEVFSADMD_NS_LOOKUP 2 75 #define DEVFSADMD_NS_READDIR 3 76 77 /* 78 * supported protocols 79 */ 80 typedef enum devname_spec { 81 DEVNAME_NS_NONE = 0, 82 DEVNAME_NS_PATH, /* physical /devices path */ 83 DEVNAME_NS_DEV /* /dev path */ 84 } devname_spec_t; 85 86 /* 87 * devfsadm_error codes 88 */ 89 #define DEVFSADM_RUN_INVALID 1 90 #define DEVFSADM_RUN_EPERM 2 91 #define DEVFSADM_RUN_NOTSUP 3 92 #define DEVFSADM_NS_FAILED 4 93 94 typedef struct sdev_ns_handle { 95 char ns_name[MAXPATHLEN]; /* device to be looked up */ 96 char ns_map[MAXPATHLEN]; 97 } sdev_ns_handle_t; 98 99 typedef struct sdev_lkp_handle { 100 devname_spec_t devfsadm_spec; /* returned path property */ 101 char devfsadm_link[MAXPATHLEN]; /* symlink destination */ 102 } sdev_lkp_handle_t; 103 104 typedef struct sdev_rdr_handle { 105 uint32_t ns_mapcount; /* number of entries in the map */ 106 uint32_t maplist_size; 107 } sdev_rdr_handle_t; 108 109 /* 110 * devfsadm/devname door data structures 111 */ 112 typedef struct sdev_door_arg { 113 uint8_t devfsadm_cmd; /* what to do for devfsadm[d] */ 114 sdev_ns_handle_t ns_hdl; 115 } sdev_door_arg_t; 116 117 typedef struct sdev_door_res { 118 int32_t devfsadm_error; 119 sdev_lkp_handle_t ns_lkp_hdl; 120 sdev_rdr_handle_t ns_rdr_hdl; 121 } sdev_door_res_t; 122 123 #ifdef _KERNEL 124 125 struct sdev_dprof { 126 int has_glob; 127 nvlist_t *dev_name; 128 nvlist_t *dev_map; 129 nvlist_t *dev_symlink; 130 nvlist_t *dev_glob_incdir; 131 nvlist_t *dev_glob_excdir; 132 }; 133 134 /* 135 * devname_handle_t 136 */ 137 struct devname_handle { 138 struct sdev_node *dh_data; /* the sdev_node */ 139 devname_spec_t dh_spec; 140 void *dh_args; 141 }; 142 typedef struct devname_handle devname_handle_t; 143 144 /* 145 * Per-instance node data for the global zone instance 146 * Only one mount of /dev in the global zone 147 */ 148 typedef struct sdev_global_data { 149 struct devname_handle sdev_ghandle; 150 struct devname_nsmap *sdev_gmapinfo; /* VDIR name service info */ 151 ulong_t sdev_dir_ggen; /* name space generation # */ 152 } sdev_global_data_t; 153 154 /* 155 * Per-instance node data - profile data per non-global zone mount instance 156 */ 157 typedef struct sdev_local_data { 158 ulong_t sdev_dir_lgen; /* cached generation # of /dev dir */ 159 ulong_t sdev_devtree_lgen; /* cached generation # of devtree */ 160 struct sdev_node *sdev_lorigin; /* corresponding global sdev_node */ 161 struct sdev_dprof sdev_lprof; /* profile for multi-inst */ 162 } sdev_local_data_t; 163 164 /* 165 * /dev filesystem sdev_node defines 166 */ 167 typedef struct sdev_node { 168 char *sdev_name; /* node name */ 169 size_t sdev_namelen; /* strlen(sdev_name) */ 170 char *sdev_path; /* absolute path */ 171 char *sdev_symlink; /* source for a symlink */ 172 struct vnode *sdev_vnode; /* vnode */ 173 174 krwlock_t sdev_contents; /* rw lock for this data structure */ 175 struct sdev_node *sdev_dotdot; /* parent */ 176 struct sdev_node *sdev_dot; /* child: VDIR: head of children */ 177 struct sdev_node *sdev_next; /* sibling: next in this directory */ 178 179 struct vnode *sdev_attrvp; /* backing store vnode if persisted */ 180 struct vattr *sdev_attr; /* memory copy of the vattr */ 181 182 ino64_t sdev_ino; /* inode */ 183 uint_t sdev_nlink; /* link count */ 184 int sdev_state; /* state of this node */ 185 int sdev_flags; /* flags bit */ 186 187 kmutex_t sdev_lookup_lock; /* node creation synch lock */ 188 kcondvar_t sdev_lookup_cv; /* node creation sync cv */ 189 int sdev_lookup_flags; /* node creation flags */ 190 191 /* per-instance data, either global or non-global zone */ 192 union { 193 struct sdev_global_data sdev_globaldata; 194 struct sdev_local_data sdev_localdata; 195 } sdev_instance_data; 196 } sdev_node_t; 197 198 #define sdev_ldata sdev_instance_data.sdev_localdata 199 #define sdev_gdata sdev_instance_data.sdev_globaldata 200 201 #define sdev_handle sdev_gdata.sdev_ghandle 202 #define sdev_mapinfo sdev_gdata.sdev_gmapinfo 203 #define sdev_gdir_gen sdev_gdata.sdev_dir_ggen 204 205 #define sdev_ldir_gen sdev_ldata.sdev_dir_lgen 206 #define sdev_devtree_gen sdev_ldata.sdev_devtree_lgen 207 #define sdev_origin sdev_ldata.sdev_lorigin 208 #define sdev_prof sdev_ldata.sdev_lprof 209 210 /* 211 * sdev_state 212 * 213 * A sdev_node may go through 3 states: 214 * SDEV_INIT: When a new /dev file is first looked up, a sdev_node 215 * is allocated, initialized and added to the directory's 216 * sdev_node cache. A node at this state will also 217 * have the SDEV_LOOKUP flag set. 218 * 219 * Other threads that are trying to look up a node at 220 * this state will be blocked until the SDEV_LOOKUP flag 221 * is cleared. 222 * 223 * When the SDEV_LOOKUP flag is cleared, the node may 224 * transition into the SDEV_READY state for a successful 225 * lookup or the node is removed from the directory cache 226 * and destroyed if the named node can not be found. 227 * An ENOENT error is returned for the second case. 228 * 229 * SDEV_READY: A /dev file has been successfully looked up and 230 * associated with a vnode. The /dev file is available 231 * for the supported /dev filesystem operations. 232 * 233 * SDEV_ZOMBIE: Deletion of a /dev file has been explicitely issued 234 * to an SDEV_READY node. The node is transitioned into 235 * the SDEV_ZOMBIE state if the vnode reference count 236 * is still held. A SDEV_ZOMBIE node does not support 237 * any of the /dev filesystem operations. A SDEV_ZOMBIE 238 * node is removed from the directory cache and destroyed 239 * once the reference count reaches "zero". 240 */ 241 typedef enum { 242 SDEV_ZOMBIE = -1, 243 SDEV_INIT = 0, 244 SDEV_READY 245 } sdev_node_state_t; 246 247 /* sdev_flags */ 248 #define SDEV_BUILD 0x0001 /* directory cache out-of-date */ 249 #define SDEV_STALE 0x0002 /* stale sdev nodes */ 250 #define SDEV_GLOBAL 0x0004 /* global /dev nodes */ 251 #define SDEV_PERSIST 0x0008 /* backing store persisted node */ 252 #define SDEV_NO_NCACHE 0x0010 /* do not include in neg. cache */ 253 #define SDEV_DYNAMIC 0x0020 /* special-purpose vnode ops (ex: pts) */ 254 #define SDEV_VTOR 0x0040 /* validate sdev_nodes during search */ 255 256 /* sdev_lookup_flags */ 257 #define SDEV_LOOKUP 0x0001 /* node creation in progress */ 258 #define SDEV_READDIR 0x0002 /* VDIR readdir in progress */ 259 #define SDEV_LGWAITING 0x0004 /* waiting for devfsadm completion */ 260 261 #define SDEV_VTOR_INVALID -1 262 #define SDEV_VTOR_SKIP 0 263 #define SDEV_VTOR_VALID 1 264 265 /* convenient macros */ 266 #define SDEV_IS_GLOBAL(dv) \ 267 (dv->sdev_flags & SDEV_GLOBAL) 268 #define SDEV_IS_PERSIST(dv) \ 269 (dv->sdev_flags & SDEV_PERSIST) 270 #define SDEV_IS_DYNAMIC(dv) \ 271 (dv->sdev_flags & SDEV_DYNAMIC) 272 #define SDEV_IS_NO_NCACHE(dv) \ 273 (dv->sdev_flags & SDEV_NO_NCACHE) 274 275 #define SDEV_IS_LOOKUP(dv) \ 276 (dv->sdev_lookup_flags & SDEV_LOOKUP) 277 #define SDEV_IS_READDIR(dv) \ 278 (dv->sdev_lookup_flags & SDEV_READDIR) 279 #define SDEV_IS_LGWAITING(dv) \ 280 (dv->sdev_lookup_flags & SDEV_LGWAITING) 281 282 #define SDEVTOV(n) ((struct vnode *)(n)->sdev_vnode) 283 #define VTOSDEV(vp) ((struct sdev_node *)(vp)->v_data) 284 #define VN_HELD(v) ((v)->v_count != 0) 285 #define SDEV_HELD(dv) (VN_HELD(SDEVTOV(dv))) 286 #define SDEV_HOLD(dv) VN_HOLD(SDEVTOV(dv)) 287 #define SDEV_RELE(dv) VN_RELE(SDEVTOV(dv)) 288 #define SDEV_SIMPLE_RELE(dv) { \ 289 mutex_enter(&SDEVTOV(dv)->v_lock); \ 290 SDEVTOV(dv)->v_count--; \ 291 mutex_exit(&SDEVTOV(dv)->v_lock); \ 292 } 293 294 #define SDEV_ACL_FLAVOR(vp) (VFSTOSDEVFS(vp->v_vfsp)->sdev_acl_flavor) 295 296 /* 297 * some defaults 298 */ 299 #define SDEV_ROOTINO ((ino_t)2) 300 #define SDEV_UID_DEFAULT (0) 301 #define SDEV_GID_DEFAULT (3) 302 #define SDEV_DIRMODE_DEFAULT (S_IFDIR |0755) 303 #define SDEV_DEVMODE_DEFAULT (0600) 304 #define SDEV_LNKMODE_DEFAULT (S_IFLNK | 0777) 305 306 extern struct vattr sdev_vattr_dir; 307 extern struct vattr sdev_vattr_lnk; 308 extern struct vattr sdev_vattr_blk; 309 extern struct vattr sdev_vattr_chr; 310 311 /* 312 * devname_lookup_func() 313 */ 314 extern int devname_lookup_func(struct sdev_node *, char *, struct vnode **, 315 struct cred *, int (*)(struct sdev_node *, char *, void **, struct cred *, 316 void *, char *), int); 317 318 /* 319 * flags used by devname_lookup_func callbacks 320 */ 321 #define SDEV_PATH 0x1 /* callback returning /devices physical path */ 322 #define SDEV_VNODE 0x2 /* callback returning backing store vnode */ 323 #define SDEV_VATTR 0x4 /* callback returning node vattr */ 324 325 /* 326 * devname_readdir_func() 327 */ 328 extern int devname_readdir_func(vnode_t *, uio_t *, cred_t *, int *, int); 329 330 /* 331 * flags for devname_readdir_func 332 */ 333 #define SDEV_BROWSE 0x1 /* fetch all entries from backing store */ 334 335 /* 336 * devname_setattr_func() 337 */ 338 extern int devname_setattr_func(struct vnode *, struct vattr *, int, 339 struct cred *, int (*)(struct sdev_node *, struct vattr *, int), int); 340 341 /* 342 * /dev file system instance defines 343 */ 344 /* 345 * /dev version of vfs_data 346 */ 347 struct sdev_data { 348 struct sdev_data *sdev_prev; 349 struct sdev_data *sdev_next; 350 struct sdev_node *sdev_root; 351 struct vfs *sdev_vfsp; 352 struct sdev_mountargs *sdev_mountargs; 353 ulong_t sdev_acl_flavor; 354 }; 355 356 #define VFSTOSDEVFS(vfsp) ((struct sdev_data *)((vfsp)->vfs_data)) 357 358 /* 359 * sdev_fid overlays the fid structure (for VFS_VGET) 360 */ 361 struct sdev_fid { 362 uint16_t sdevfid_len; 363 ino32_t sdevfid_ino; 364 int32_t sdevfid_gen; 365 }; 366 367 /* 368 * devfsadm and devname communication defines 369 */ 370 typedef enum { 371 DEVNAME_DEVFSADM_STOPPED = 0, /* devfsadm has never run */ 372 DEVNAME_DEVFSADM_RUNNING, /* devfsadm is running */ 373 DEVNAME_DEVFSADM_RUN /* devfsadm ran once */ 374 } devname_devfsadm_state_t; 375 376 extern volatile uint_t devfsadm_state; /* atomic mask for devfsadm status */ 377 378 #define DEVNAME_DEVFSADM_SET_RUNNING(devfsadm_state) \ 379 devfsadm_state = DEVNAME_DEVFSADM_RUNNING 380 #define DEVNAME_DEVFSADM_SET_STOP(devfsadm_state) \ 381 devfsadm_state = DEVNAME_DEVFSADM_STOPPED 382 #define DEVNAME_DEVFSADM_SET_RUN(devfsadm_state) \ 383 devfsadm_state = DEVNAME_DEVFSADM_RUN 384 #define DEVNAME_DEVFSADM_IS_RUNNING(devfsadm_state) \ 385 devfsadm_state == DEVNAME_DEVFSADM_RUNNING 386 #define DEVNAME_DEVFSADM_HAS_RUN(devfsadm_state) \ 387 (devfsadm_state == DEVNAME_DEVFSADM_RUN) 388 389 #define SDEV_BLOCK_OTHERS(dv, cmd) { \ 390 ASSERT(MUTEX_HELD(&dv->sdev_lookup_lock)); \ 391 dv->sdev_lookup_flags |= cmd; \ 392 } 393 extern void sdev_unblock_others(struct sdev_node *, uint_t); 394 #define SDEV_UNBLOCK_OTHERS(dv, cmd) { \ 395 sdev_unblock_others(dv, cmd); \ 396 } 397 398 #define SDEV_CLEAR_LOOKUP_FLAGS(dv, cmd) { \ 399 dv->sdev_lookup_flags &= ~cmd; \ 400 } 401 402 extern int sdev_wait4lookup(struct sdev_node *, int); 403 extern int devname_filename_register(int, char *); 404 extern int devname_nsmaps_register(char *, size_t); 405 extern void sdev_devfsadm_lockinit(void); 406 extern void sdev_devfsadm_lockdestroy(void); 407 extern void devname_add_devfsadm_node(char *); 408 extern void sdev_devfsadmd_thread(struct sdev_node *, struct sdev_node *, 409 struct cred *); 410 extern int devname_profile_update(char *, size_t); 411 extern struct sdev_data *sdev_find_mntinfo(char *); 412 void sdev_mntinfo_rele(struct sdev_data *); 413 extern struct vnodeops *devpts_getvnodeops(void); 414 415 /* 416 * Directory Based Device Naming (DBNR) defines 417 */ 418 419 #define ETC_DEV_DIR "/etc/dev" 420 #define DEVNAME_NSCONFIG "sdev_nsconfig_mod" 421 422 /* 423 * directory name rule 424 */ 425 struct devname_nsmap { 426 struct devname_nsmap *prev; /* previous entry */ 427 struct devname_nsmap *next; /* next entry */ 428 char *dir_name; /* /dev subdir name, e.g. /dev/disk */ 429 char *dir_module; /* devname module impl the operations */ 430 char *dir_map; /* dev naming rules, e.g. /etc/dev/disks */ 431 struct devname_ops *dir_ops; /* directory specific vnode ops */ 432 char *dir_newmodule; /* to be reloaded */ 433 char *dir_newmap; /* to be reloaded */ 434 int dir_invalid; /* map entry obsolete */ 435 int dir_maploaded; /* map contents read */ 436 krwlock_t dir_lock; /* protects the data structure */ 437 }; 438 439 /* 440 * name-property pairs to be looked up 441 */ 442 typedef struct devname_lkp_arg { 443 char *devname_dir; /* the directory to look */ 444 char *devname_name; /* the device name to be looked up */ 445 char *devname_map; /* the directory device naming map */ 446 int reserved; 447 } devname_lkp_arg_t; 448 449 /* 450 * name-value-property restured 451 */ 452 typedef struct devname_lkp_result { 453 devname_spec_t devname_spec; /* link to /devices or /dev */ 454 char *devname_link; /* the source path */ 455 int reserved; 456 } devname_lkp_result_t; 457 458 /* 459 * directory name-value populating results 460 */ 461 typedef struct devname_rdr_result { 462 uint32_t ns_mapcount; 463 } devname_rdr_result_t; 464 465 /* 466 * sdev_nsrdr work 467 */ 468 typedef struct sdev_nsrdr_work { 469 char *dir_name; 470 char *dir_map; 471 struct sdev_node *dir_dv; 472 devname_rdr_result_t **result; 473 struct sdev_nsrdr_work *next; 474 } sdev_nsrdr_work_t; 475 476 477 /* 478 * boot states - warning, the ordering here is significant 479 * 480 * the difference between "system available" and "boot complete" 481 * is a debounce timeout to catch some daemon issuing a readdir 482 * triggering a nuisance implict reconfig on each boot. 483 */ 484 #define SDEV_BOOT_STATE_INITIAL 0 485 #define SDEV_BOOT_STATE_RECONFIG 1 /* reconfig */ 486 #define SDEV_BOOT_STATE_SYSAVAIL 2 /* system available */ 487 #define SDEV_BOOT_STATE_COMPLETE 3 /* boot complete */ 488 489 /* 490 * Negative cache list and list element 491 * The mutex protects the flags against multiple accesses and 492 * must only be acquired when already holding the r/w lock. 493 */ 494 typedef struct sdev_nc_list { 495 list_t ncl_list; /* the list itself */ 496 kmutex_t ncl_mutex; /* protects ncl_flags */ 497 krwlock_t ncl_lock; /* protects ncl_list */ 498 int ncl_flags; 499 int ncl_nentries; 500 } sdev_nc_list_t; 501 502 typedef struct sdev_nc_node { 503 char *ncn_name; /* name of the node */ 504 int ncn_flags; /* state information */ 505 int ncn_expirecnt; /* remove once expired */ 506 list_node_t ncn_link; /* link to next in list */ 507 } sdev_nc_node_t; 508 509 /* ncl_flags */ 510 #define NCL_LIST_DIRTY 0x01 /* needs to be flushed */ 511 #define NCL_LIST_WRITING 0x02 /* write in progress */ 512 #define NCL_LIST_WENABLE 0x04 /* write-enabled post boot */ 513 514 /* ncn_flags */ 515 #define NCN_ACTIVE 0x01 /* a lookup has occurred */ 516 #define NCN_SRC_STORE 0x02 /* src: persistent store */ 517 #define NCN_SRC_CURRENT 0x04 /* src: current boot */ 518 519 /* sdev_lookup_failed flags */ 520 #define SLF_NO_NCACHE 0x01 /* node should not be added to ncache */ 521 #define SLF_REBUILT 0x02 /* reconfig performed during lookup attempt */ 522 523 /* 524 * The nvlist name and nvpair identifiers in the 525 * /etc/devices/devname_cache nvlist format 526 */ 527 #define DP_DEVNAME_ID "devname" 528 #define DP_DEVNAME_NCACHE_ID "ncache" 529 #define DP_DEVNAME_NC_EXPIRECNT_ID "expire-counts" 530 531 /* devname-cache list element */ 532 typedef struct nvp_devname { 533 char **nvp_paths; 534 int *nvp_expirecnts; 535 int nvp_npaths; 536 list_node_t nvp_link; 537 } nvp_devname_t; 538 539 /* 540 * name service globals and prototypes 541 */ 542 543 extern struct devname_ops *devname_ns_ops; 544 extern int devname_nsmaps_loaded; 545 extern kmutex_t devname_nsmaps_lock; 546 547 extern void sdev_invalidate_nsmaps(void); 548 extern void sdev_validate_nsmaps(void); 549 extern int sdev_module_register(char *, struct devname_ops *); 550 extern struct devname_nsmap *sdev_get_nsmap_by_dir(char *, int); 551 extern struct devname_nsmap *sdev_get_nsmap_by_module(char *); 552 extern void sdev_dispatch_to_nsrdr_thread(struct sdev_node *, char *, 553 devname_rdr_result_t *); 554 extern void sdev_insert_nsmap(char *, char *, char *); 555 extern int devname_nsmap_lookup(devname_lkp_arg_t *, devname_lkp_result_t **); 556 extern struct devname_nsmap *sdev_get_map(struct sdev_node *, int); 557 extern int sdev_nsmaps_loaded(void); 558 extern void sdev_replace_nsmap(struct devname_nsmap *, char *, char *); 559 extern int sdev_nsmaps_reloaded(void); 560 extern int devname_get_dir_nsmap(devname_handle_t *, struct devname_nsmap **); 561 562 /* 563 * vnodeops and vfsops helpers 564 */ 565 566 typedef enum { 567 SDEV_CACHE_ADD = 0, 568 SDEV_CACHE_DELETE 569 } sdev_cache_ops_t; 570 571 extern struct sdev_node *sdev_cache_lookup(struct sdev_node *, char *); 572 extern int sdev_cache_update(struct sdev_node *, struct sdev_node **, char *, 573 sdev_cache_ops_t); 574 extern void sdev_node_cache_init(void); 575 extern void sdev_node_cache_fini(void); 576 extern struct sdev_node *sdev_mkroot(struct vfs *, dev_t, struct vnode *, 577 struct vnode *, struct cred *); 578 extern void sdev_filldir_dynamic(struct sdev_node *); 579 extern int sdev_mknode(struct sdev_node *, char *, struct sdev_node **, 580 struct vattr *, struct vnode *, void *, struct cred *, sdev_node_state_t); 581 extern int sdev_nodeinit(struct sdev_node *, char *, struct sdev_node **, 582 vattr_t *); 583 extern int sdev_nodeready(struct sdev_node *, vattr_t *, vnode_t *, void *, 584 cred_t *); 585 extern int sdev_shadow_node(struct sdev_node *, struct cred *); 586 extern void sdev_nodedestroy(struct sdev_node *, uint_t); 587 extern void sdev_update_timestamps(struct vnode *, cred_t *, uint_t); 588 extern void sdev_vattr_merge(struct sdev_node *, struct vattr *); 589 extern void sdev_devstate_change(void); 590 extern int sdev_lookup_filter(sdev_node_t *, char *); 591 extern void sdev_lookup_failed(sdev_node_t *, char *, int); 592 extern int sdev_unlocked_access(void *, int, struct cred *); 593 594 #define SDEV_ENFORCE 0x1 595 extern void sdev_stale(struct sdev_node *); 596 extern int sdev_cleandir(struct sdev_node *, char *, uint_t); 597 extern int sdev_rnmnode(struct sdev_node *, struct sdev_node *, 598 struct sdev_node *, struct sdev_node **, char *, struct cred *); 599 extern size_t add_dir_entry(dirent64_t *, char *, size_t, ino_t, offset_t); 600 extern int sdev_to_vp(struct sdev_node *, struct vnode **); 601 extern ino_t sdev_mkino(struct sdev_node *); 602 extern int devname_backstore_lookup(struct sdev_node *, char *, 603 struct vnode **); 604 extern int sdev_is_devfs_node(char *); 605 extern int sdev_copyin_mountargs(struct mounta *, struct sdev_mountargs *); 606 extern int sdev_reserve_subdirs(struct sdev_node *); 607 extern int prof_lookup(); 608 extern void prof_filldir(struct sdev_node *); 609 extern int devpts_validate(struct sdev_node *dv); 610 extern void *sdev_get_vtor(struct sdev_node *dv); 611 612 /* 613 * devinfo helpers 614 */ 615 extern int sdev_modctl_readdir(const char *, char ***, int *, int *); 616 extern void sdev_modctl_readdir_free(char **, int, int); 617 extern int sdev_modctl_devexists(const char *); 618 619 620 /* 621 * ncache handlers 622 */ 623 624 extern void sdev_ncache_init(void); 625 extern void sdev_ncache_setup(void); 626 extern void sdev_ncache_teardown(void); 627 extern void sdev_nc_addname(sdev_nc_list_t *, sdev_node_t *, char *, int); 628 extern void sdev_nc_node_exists(sdev_node_t *); 629 extern void sdev_nc_path_exists(sdev_nc_list_t *, char *); 630 extern void sdev_modctl_dump_files(void); 631 632 /* 633 * globals 634 */ 635 extern kmutex_t sdev_lock; 636 extern int devtype; 637 extern kmem_cache_t *sdev_node_cache; 638 extern struct vnodeops *sdev_vnodeops; 639 extern struct vnodeops *devpts_vnodeops; 640 extern struct sdev_data *sdev_origins; /* mount info for global /dev instance */ 641 extern const fs_operation_def_t sdev_vnodeops_tbl[]; 642 extern const fs_operation_def_t devpts_vnodeops_tbl[]; 643 extern const fs_operation_def_t devsys_vnodeops_tbl[]; 644 extern const fs_operation_def_t devpseudo_vnodeops_tbl[]; 645 646 extern sdev_nc_list_t *sdev_ncache; 647 extern int sdev_reconfig_boot; 648 extern int sdev_boot_state; 649 extern int sdev_reconfig_verbose; 650 extern int sdev_reconfig_disable; 651 extern int sdev_nc_disable; 652 extern int sdev_nc_disable_reset; 653 extern int sdev_nc_verbose; 654 655 /* 656 * misc. defines 657 */ 658 #ifdef DEBUG 659 extern int sdev_debug; 660 #define SDEV_DEBUG 0x01 /* error messages to console/log */ 661 #define SDEV_DEBUG_VOPS 0x02 /* vnode ops errors */ 662 #define SDEV_DEBUG_DLF 0x04 /* trace devname_lookup_func */ 663 #define SDEV_DEBUG_DRF 0x08 /* trace devname_readdir_func */ 664 #define SDEV_DEBUG_NCACHE 0x10 /* negative cache tracing */ 665 #define SDEV_DEBUG_DEVFSADMD 0x20 /* comm. of devnamefs & devfsadm */ 666 #define SDEV_DEBUG_PTS 0x40 /* /dev/pts tracing */ 667 #define SDEV_DEBUG_RECONFIG 0x80 /* events triggering reconfig */ 668 #define SDEV_DEBUG_SDEV_NODE 0x100 /* trace sdev_node activities */ 669 #define SDEV_DEBUG_PROFILE 0x200 /* trace sdev_profile */ 670 #define SDEV_DEBUG_MODCTL 0x400 /* trace modctl activity */ 671 #define SDEV_DEBUG_FLK 0x800 /* trace failed lookups */ 672 673 #define sdcmn_err(args) if (sdev_debug & SDEV_DEBUG) printf args 674 #define sdcmn_err2(args) if (sdev_debug & SDEV_DEBUG_VOPS) printf args 675 #define sdcmn_err3(args) if (sdev_debug & SDEV_DEBUG_DLF) printf args 676 #define sdcmn_err4(args) if (sdev_debug & SDEV_DEBUG_DRF) printf args 677 #define sdcmn_err5(args) if (sdev_debug & SDEV_DEBUG_NCACHE) printf args 678 #define sdcmn_err6(args) if (sdev_debug & SDEV_DEBUG_DEVFSADMD) printf args 679 #define sdcmn_err7(args) if (sdev_debug & SDEV_DEBUG_PTS) printf args 680 #define sdcmn_err8(args) if (sdev_debug & SDEV_DEBUG_RECONFIG) printf args 681 #define sdcmn_err9(args) if (sdev_debug & SDEV_DEBUG_SDEV_NODE) printf args 682 #define sdcmn_err10(args) if (sdev_debug & SDEV_DEBUG_PROFILE) printf args 683 #define sdcmn_err11(args) if (sdev_debug & SDEV_DEBUG_MODCTL) printf args 684 #define impossible(args) printf args 685 #else 686 #define sdcmn_err(args) /* does nothing */ 687 #define sdcmn_err2(args) /* does nothing */ 688 #define sdcmn_err3(args) /* does nothing */ 689 #define sdcmn_err4(args) /* does nothing */ 690 #define sdcmn_err5(args) /* does nothing */ 691 #define sdcmn_err6(args) /* does nothing */ 692 #define sdcmn_err7(args) /* does nothing */ 693 #define sdcmn_err8(args) /* does nothing */ 694 #define sdcmn_err9(args) /* does nothing */ 695 #define sdcmn_err10(args) /* does nothing */ 696 #define sdcmn_err11(args) /* does nothing */ 697 #define impossible(args) /* does nothing */ 698 #endif 699 700 #ifdef DEBUG 701 #define SD_TRACE_FAILED_LOOKUP(ddv, nm, retried) \ 702 if ((sdev_debug & SDEV_DEBUG_FLK) || \ 703 ((retried) && (sdev_debug & SDEV_DEBUG_RECONFIG))) { \ 704 printf("lookup of %s/%s by %s failed, line %d\n", \ 705 (ddv)->sdev_name, (nm), curproc->p_user.u_comm, \ 706 __LINE__); \ 707 } 708 #else 709 #define SD_TRACE_FAILED_LOOKUP(ddv, nm, retried) 710 #endif 711 712 #endif /* _KERNEL */ 713 714 #ifdef __cplusplus 715 } 716 #endif 717 718 #endif /* _SYS_SDEV_IMPL_H */ 719