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 2006 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/list.h> 39 #include <sys/nvpair.h> 40 41 /* 42 * sdev_nodes are the file-system specific part of the 43 * vnodes for the device filesystem. 44 * 45 * The device filesystem exports two node types: 46 * 47 * VDIR nodes to represent directories 48 * VCHR & VBLK nodes to represent devices 49 */ 50 51 /* 52 * /dev mount arguments 53 */ 54 struct sdev_mountargs { 55 uint64_t sdev_attrdir; 56 }; 57 58 59 /* 60 * Nvpair names of profile information (list of device files available) of 61 * non-global /dev mounts. These strings must be unique among them. 62 */ 63 #define SDEV_NVNAME_MOUNTPT "prof_mountpt" 64 #define SDEV_NVNAME_INCLUDE "prof_include" 65 #define SDEV_NVNAME_EXCLUDE "prof_exclude" 66 #define SDEV_NVNAME_SYMLINK "prof_symlink" 67 #define SDEV_NVNAME_MAP "prof_map" 68 69 /* 70 * supported devfsadm_cmd 71 */ 72 #define DEVFSADMD_RUN_ALL 1 73 #define DEVFSADMD_NS_LOOKUP 2 74 #define DEVFSADMD_NS_READDIR 3 75 76 /* 77 * supported protocols 78 */ 79 typedef enum devname_spec { 80 DEVNAME_NS_NONE = 0, 81 DEVNAME_NS_PATH, /* physical /devices path */ 82 DEVNAME_NS_DEV /* /dev path */ 83 } devname_spec_t; 84 85 /* 86 * devfsadm_error codes 87 */ 88 #define DEVFSADM_RUN_INVALID 1 89 #define DEVFSADM_RUN_EPERM 2 90 #define DEVFSADM_RUN_NOTSUP 3 91 #define DEVFSADM_NS_FAILED 4 92 93 typedef struct sdev_ns_handle { 94 char ns_name[MAXPATHLEN]; /* device to be looked up */ 95 char ns_map[MAXPATHLEN]; 96 } sdev_ns_handle_t; 97 98 typedef struct sdev_lkp_handle { 99 devname_spec_t devfsadm_spec; /* returned path property */ 100 char devfsadm_link[MAXPATHLEN]; /* symlink destination */ 101 } sdev_lkp_handle_t; 102 103 typedef struct sdev_rdr_handle { 104 uint32_t ns_mapcount; /* number of entries in the map */ 105 uint32_t maplist_size; 106 } sdev_rdr_handle_t; 107 108 /* 109 * devfsadm/devname door data structures 110 */ 111 typedef struct sdev_door_arg { 112 uint8_t devfsadm_cmd; /* what to do for devfsadm[d] */ 113 sdev_ns_handle_t ns_hdl; 114 } sdev_door_arg_t; 115 116 typedef struct sdev_door_res { 117 int32_t devfsadm_error; 118 sdev_lkp_handle_t ns_lkp_hdl; 119 sdev_rdr_handle_t ns_rdr_hdl; 120 } sdev_door_res_t; 121 122 #ifdef _KERNEL 123 124 struct sdev_dprof { 125 int has_glob; 126 nvlist_t *dev_name; 127 nvlist_t *dev_map; 128 nvlist_t *dev_symlink; 129 nvlist_t *dev_glob_incdir; 130 nvlist_t *dev_glob_excdir; 131 }; 132 133 /* 134 * devname_handle_t 135 */ 136 struct devname_handle { 137 struct sdev_node *dh_data; /* the sdev_node */ 138 devname_spec_t dh_spec; 139 void *dh_args; 140 }; 141 typedef struct devname_handle devname_handle_t; 142 143 /* 144 * Per-instance node data for the global zone instance 145 * Only one mount of /dev in the global zone 146 */ 147 typedef struct sdev_global_data { 148 struct devname_handle sdev_ghandle; 149 struct devname_nsmap *sdev_gmapinfo; /* VDIR name service info */ 150 ulong_t sdev_dir_ggen; /* name space generation # */ 151 } sdev_global_data_t; 152 153 /* 154 * Per-instance node data - profile data per non-global zone mount instance 155 */ 156 typedef struct sdev_local_data { 157 ulong_t sdev_dir_lgen; /* cached generation # of /dev dir */ 158 ulong_t sdev_devtree_lgen; /* cached generation # of devtree */ 159 struct sdev_node *sdev_lorigin; /* corresponding global sdev_node */ 160 struct sdev_dprof sdev_lprof; /* profile for multi-inst */ 161 } sdev_local_data_t; 162 163 /* 164 * /dev filesystem sdev_node defines 165 */ 166 typedef struct sdev_node { 167 char *sdev_name; /* node name */ 168 size_t sdev_namelen; /* strlen(sdev_name) */ 169 char *sdev_path; /* absolute path */ 170 char *sdev_symlink; /* source for a symlink */ 171 struct vnode *sdev_vnode; /* vnode */ 172 173 krwlock_t sdev_contents; /* rw lock for this data structure */ 174 struct sdev_node *sdev_dotdot; /* parent */ 175 struct sdev_node *sdev_dot; /* child: VDIR: head of children */ 176 struct sdev_node *sdev_next; /* sibling: next in this directory */ 177 178 struct vnode *sdev_attrvp; /* backing store vnode if persisted */ 179 struct vattr *sdev_attr; /* memory copy of the vattr */ 180 181 ino64_t sdev_ino; /* inode */ 182 uint_t sdev_nlink; /* link count */ 183 int sdev_state; /* state of this node */ 184 int sdev_flags; /* flags bit */ 185 186 kmutex_t sdev_lookup_lock; /* node creation synch lock */ 187 kcondvar_t sdev_lookup_cv; /* node creation sync cv */ 188 int sdev_lookup_flags; /* node creation flags */ 189 190 /* per-instance data, either global or non-global zone */ 191 union { 192 struct sdev_global_data sdev_globaldata; 193 struct sdev_local_data sdev_localdata; 194 } sdev_instance_data; 195 } sdev_node_t; 196 197 #define sdev_ldata sdev_instance_data.sdev_localdata 198 #define sdev_gdata sdev_instance_data.sdev_globaldata 199 200 #define sdev_handle sdev_gdata.sdev_ghandle 201 #define sdev_mapinfo sdev_gdata.sdev_gmapinfo 202 #define sdev_gdir_gen sdev_gdata.sdev_dir_ggen 203 204 #define sdev_ldir_gen sdev_ldata.sdev_dir_lgen 205 #define sdev_devtree_gen sdev_ldata.sdev_devtree_lgen 206 #define sdev_origin sdev_ldata.sdev_lorigin 207 #define sdev_prof sdev_ldata.sdev_lprof 208 209 /* 210 * sdev_state 211 * 212 * A sdev_node may go through 3 states: 213 * SDEV_INIT: When a new /dev file is first looked up, a sdev_node 214 * is allocated, initialized and added to the directory's 215 * sdev_node cache. A node at this state will also 216 * have the SDEV_LOOKUP flag set. 217 * 218 * Other threads that are trying to look up a node at 219 * this state will be blocked until the SDEV_LOOKUP flag 220 * is cleared. 221 * 222 * When the SDEV_LOOKUP flag is cleared, the node may 223 * transition into the SDEV_READY state for a successful 224 * lookup or the node is removed from the directory cache 225 * and destroyed if the named node can not be found. 226 * An ENOENT error is returned for the second case. 227 * 228 * SDEV_READY: A /dev file has been successfully looked up and 229 * associated with a vnode. The /dev file is available 230 * for the supported /dev filesystem operations. 231 * 232 * SDEV_ZOMBIE: Deletion of a /dev file has been explicitely issued 233 * to an SDEV_READY node. The node is transitioned into 234 * the SDEV_ZOMBIE state if the vnode reference count 235 * is still held. A SDEV_ZOMBIE node does not support 236 * any of the /dev filesystem operations. A SDEV_ZOMBIE 237 * node is removed from the directory cache and destroyed 238 * once the reference count reaches "zero". 239 */ 240 typedef enum { 241 SDEV_ZOMBIE = -1, 242 SDEV_INIT = 0, 243 SDEV_READY 244 } sdev_node_state_t; 245 246 /* sdev_flags */ 247 #define SDEV_BUILD 0x0001 /* directory cache out-of-date */ 248 #define SDEV_STALE 0x0002 /* stale sdev nodes */ 249 #define SDEV_GLOBAL 0x0004 /* global /dev nodes */ 250 #define SDEV_PERSIST 0x0008 /* backing store persisted node */ 251 #define SDEV_NO_NCACHE 0x0010 /* do not include in neg. cache */ 252 #define SDEV_DYNAMIC 0x0020 /* special-purpose vnode ops (ex: pts) */ 253 #define SDEV_VTOR 0x0040 /* validate sdev_nodes during search */ 254 255 /* sdev_lookup_flags */ 256 #define SDEV_LOOKUP 0x0001 /* node creation in progress */ 257 #define SDEV_READDIR 0x0002 /* VDIR readdir in progress */ 258 #define SDEV_LGWAITING 0x0004 /* waiting for devfsadm completion */ 259 260 #define SDEV_VTOR_INVALID -1 261 #define SDEV_VTOR_SKIP 0 262 #define SDEV_VTOR_VALID 1 263 264 /* convenient macros */ 265 #define SDEV_IS_GLOBAL(dv) \ 266 (dv->sdev_flags & SDEV_GLOBAL) 267 #define SDEV_IS_PERSIST(dv) \ 268 (dv->sdev_flags & SDEV_PERSIST) 269 #define SDEV_IS_DYNAMIC(dv) \ 270 (dv->sdev_flags & SDEV_DYNAMIC) 271 #define SDEV_IS_NO_NCACHE(dv) \ 272 (dv->sdev_flags & SDEV_NO_NCACHE) 273 274 #define SDEV_IS_LOOKUP(dv) \ 275 (dv->sdev_lookup_flags & SDEV_LOOKUP) 276 #define SDEV_IS_READDIR(dv) \ 277 (dv->sdev_lookup_flags & SDEV_READDIR) 278 #define SDEV_IS_LGWAITING(dv) \ 279 (dv->sdev_lookup_flags & SDEV_LGWAITING) 280 281 #define SDEVTOV(n) ((struct vnode *)(n)->sdev_vnode) 282 #define VTOSDEV(vp) ((struct sdev_node *)(vp)->v_data) 283 #define VN_HELD(v) ((v)->v_count != 0) 284 #define SDEV_HELD(dv) (VN_HELD(SDEVTOV(dv))) 285 #define SDEV_HOLD(dv) VN_HOLD(SDEVTOV(dv)) 286 #define SDEV_RELE(dv) VN_RELE(SDEVTOV(dv)) 287 #define SDEV_SIMPLE_RELE(dv) { \ 288 mutex_enter(&SDEVTOV(dv)->v_lock); \ 289 SDEVTOV(dv)->v_count--; \ 290 mutex_exit(&SDEVTOV(dv)->v_lock); \ 291 } 292 293 #define SDEV_ACL_FLAVOR(vp) (VFSTOSDEVFS(vp->v_vfsp)->sdev_acl_flavor) 294 295 /* 296 * some defaults 297 */ 298 #define SDEV_ROOTINO ((ino_t)2) 299 #define SDEV_UID_DEFAULT (0) 300 #define SDEV_GID_DEFAULT (3) 301 #define SDEV_DIRMODE_DEFAULT (S_IFDIR |0755) 302 #define SDEV_DEVMODE_DEFAULT (0600) 303 #define SDEV_LNKMODE_DEFAULT (S_IFLNK | 0777) 304 305 extern struct vattr sdev_vattr_dir; 306 extern struct vattr sdev_vattr_lnk; 307 extern struct vattr sdev_vattr_blk; 308 extern struct vattr sdev_vattr_chr; 309 310 /* 311 * devname_lookup_func() 312 */ 313 extern int devname_lookup_func(struct sdev_node *, char *, struct vnode **, 314 struct cred *, int (*)(struct sdev_node *, char *, void **, struct cred *, 315 void *, char *), int); 316 317 /* 318 * flags used by devname_lookup_func callbacks 319 */ 320 #define SDEV_PATH 0x1 /* callback returning /devices physical path */ 321 #define SDEV_VNODE 0x2 /* callback returning backing store vnode */ 322 #define SDEV_VATTR 0x4 /* callback returning node vattr */ 323 324 /* 325 * devname_readdir_func() 326 */ 327 extern int devname_readdir_func(vnode_t *, uio_t *, cred_t *, int *, int); 328 329 /* 330 * flags for devname_readdir_func 331 */ 332 #define SDEV_BROWSE 0x1 /* fetch all entries from backing store */ 333 334 /* 335 * devname_setattr_func() 336 */ 337 extern int devname_setattr_func(struct vnode *, struct vattr *, int, 338 struct cred *, int (*)(struct sdev_node *, struct vattr *, int), int); 339 340 /* 341 * /dev file system instance defines 342 */ 343 /* 344 * /dev version of vfs_data 345 */ 346 struct sdev_data { 347 struct sdev_data *sdev_prev; 348 struct sdev_data *sdev_next; 349 struct sdev_node *sdev_root; 350 struct vfs *sdev_vfsp; 351 struct sdev_mountargs *sdev_mountargs; 352 ulong_t sdev_acl_flavor; 353 }; 354 355 #define VFSTOSDEVFS(vfsp) ((struct sdev_data *)((vfsp)->vfs_data)) 356 357 /* 358 * sdev_fid overlays the fid structure (for VFS_VGET) 359 */ 360 struct sdev_fid { 361 uint16_t sdevfid_len; 362 ino32_t sdevfid_ino; 363 int32_t sdevfid_gen; 364 }; 365 366 /* 367 * devfsadm and devname communication defines 368 */ 369 typedef enum { 370 DEVNAME_DEVFSADM_STOPPED = 0, /* devfsadm has never run */ 371 DEVNAME_DEVFSADM_RUNNING, /* devfsadm is running */ 372 DEVNAME_DEVFSADM_RUN /* devfsadm ran once */ 373 } devname_devfsadm_state_t; 374 375 extern volatile uint_t devfsadm_state; /* atomic mask for devfsadm status */ 376 377 #define DEVNAME_DEVFSADM_SET_RUNNING(devfsadm_state) \ 378 devfsadm_state = DEVNAME_DEVFSADM_RUNNING 379 #define DEVNAME_DEVFSADM_SET_STOP(devfsadm_state) \ 380 devfsadm_state = DEVNAME_DEVFSADM_STOPPED 381 #define DEVNAME_DEVFSADM_SET_RUN(devfsadm_state) \ 382 devfsadm_state = DEVNAME_DEVFSADM_RUN 383 #define DEVNAME_DEVFSADM_IS_RUNNING(devfsadm_state) \ 384 devfsadm_state == DEVNAME_DEVFSADM_RUNNING 385 #define DEVNAME_DEVFSADM_HAS_RUN(devfsadm_state) \ 386 (devfsadm_state == DEVNAME_DEVFSADM_RUN) 387 388 #define SDEV_BLOCK_OTHERS(dv, cmd) { \ 389 ASSERT(MUTEX_HELD(&dv->sdev_lookup_lock)); \ 390 dv->sdev_lookup_flags |= cmd; \ 391 } 392 extern void sdev_unblock_others(struct sdev_node *, uint_t); 393 #define SDEV_UNBLOCK_OTHERS(dv, cmd) { \ 394 sdev_unblock_others(dv, cmd); \ 395 } 396 397 #define SDEV_CLEAR_LOOKUP_FLAGS(dv, cmd) { \ 398 dv->sdev_lookup_flags &= ~cmd; \ 399 } 400 401 extern int sdev_wait4lookup(struct sdev_node *, int); 402 extern int devname_filename_register(int, char *); 403 extern int devname_nsmaps_register(char *, size_t); 404 extern void sdev_devfsadm_lockinit(void); 405 extern void sdev_devfsadm_lockdestroy(void); 406 extern void devname_add_devfsadm_node(char *); 407 extern void sdev_devfsadmd_thread(struct sdev_node *, struct sdev_node *, 408 struct cred *); 409 extern int devname_profile_update(char *, size_t); 410 extern struct sdev_data *sdev_find_mntinfo(char *); 411 void sdev_mntinfo_rele(struct sdev_data *); 412 extern struct vnodeops *devpts_getvnodeops(void); 413 414 /* 415 * Directory Based Device Naming (DBNR) defines 416 */ 417 418 #define ETC_DEV_DIR "/etc/dev" 419 #define DEVNAME_NSCONFIG "sdev_nsconfig_mod" 420 421 /* 422 * directory name rule 423 */ 424 struct devname_nsmap { 425 struct devname_nsmap *prev; /* previous entry */ 426 struct devname_nsmap *next; /* next entry */ 427 char *dir_name; /* /dev subdir name, e.g. /dev/disk */ 428 char *dir_module; /* devname module impl the operations */ 429 char *dir_map; /* dev naming rules, e.g. /etc/dev/disks */ 430 struct devname_ops *dir_ops; /* directory specific vnode ops */ 431 char *dir_newmodule; /* to be reloaded */ 432 char *dir_newmap; /* to be reloaded */ 433 int dir_invalid; /* map entry obsolete */ 434 int dir_maploaded; /* map contents read */ 435 krwlock_t dir_lock; /* protects the data structure */ 436 }; 437 438 /* 439 * name-property pairs to be looked up 440 */ 441 typedef struct devname_lkp_arg { 442 char *devname_dir; /* the directory to look */ 443 char *devname_name; /* the device name to be looked up */ 444 char *devname_map; /* the directory device naming map */ 445 int reserved; 446 } devname_lkp_arg_t; 447 448 /* 449 * name-value-property restured 450 */ 451 typedef struct devname_lkp_result { 452 devname_spec_t devname_spec; /* link to /devices or /dev */ 453 char *devname_link; /* the source path */ 454 int reserved; 455 } devname_lkp_result_t; 456 457 /* 458 * directory name-value populating results 459 */ 460 typedef struct devname_rdr_result { 461 uint32_t ns_mapcount; 462 } devname_rdr_result_t; 463 464 /* 465 * sdev_nsrdr work 466 */ 467 typedef struct sdev_nsrdr_work { 468 char *dir_name; 469 char *dir_map; 470 struct sdev_node *dir_dv; 471 devname_rdr_result_t **result; 472 struct sdev_nsrdr_work *next; 473 } sdev_nsrdr_work_t; 474 475 476 /* 477 * boot states - warning, the ordering here is significant 478 * 479 * the difference between "system available" and "boot complete" 480 * is a debounce timeout to catch some daemon issuing a readdir 481 * triggering a nuisance implict reconfig on each boot. 482 */ 483 #define SDEV_BOOT_STATE_INITIAL 0 484 #define SDEV_BOOT_STATE_RECONFIG 1 /* reconfig */ 485 #define SDEV_BOOT_STATE_SYSAVAIL 2 /* system available */ 486 #define SDEV_BOOT_STATE_COMPLETE 3 /* boot complete */ 487 488 /* 489 * Negative cache list and list element 490 * The mutex protects the flags against multiple accesses and 491 * must only be acquired when already holding the r/w lock. 492 */ 493 typedef struct sdev_nc_list { 494 list_t ncl_list; /* the list itself */ 495 kmutex_t ncl_mutex; /* protects ncl_flags */ 496 krwlock_t ncl_lock; /* protects ncl_list */ 497 int ncl_flags; 498 int ncl_nentries; 499 } sdev_nc_list_t; 500 501 typedef struct sdev_nc_node { 502 char *ncn_name; /* name of the node */ 503 int ncn_flags; /* state information */ 504 int ncn_expirecnt; /* remove once expired */ 505 list_node_t ncn_link; /* link to next in list */ 506 } sdev_nc_node_t; 507 508 /* ncl_flags */ 509 #define NCL_LIST_DIRTY 0x01 /* needs to be flushed */ 510 #define NCL_LIST_WRITING 0x02 /* write in progress */ 511 #define NCL_LIST_WENABLE 0x04 /* write-enabled post boot */ 512 513 /* ncn_flags */ 514 #define NCN_ACTIVE 0x01 /* a lookup has occurred */ 515 #define NCN_SRC_STORE 0x02 /* src: persistent store */ 516 #define NCN_SRC_CURRENT 0x04 /* src: current boot */ 517 518 /* sdev_lookup_failed flags */ 519 #define SLF_NO_NCACHE 0x01 /* node should not be added to ncache */ 520 #define SLF_REBUILT 0x02 /* reconfig performed during lookup attempt */ 521 522 /* 523 * The nvlist name and nvpair identifiers in the 524 * /etc/devices/devname_cache nvlist format 525 */ 526 #define DP_DEVNAME_ID "devname" 527 #define DP_DEVNAME_NCACHE_ID "ncache" 528 #define DP_DEVNAME_NC_EXPIRECNT_ID "expire-counts" 529 530 /* devname-cache list element */ 531 typedef struct nvp_devname { 532 char **nvp_paths; 533 int *nvp_expirecnts; 534 int nvp_npaths; 535 list_node_t nvp_link; 536 } nvp_devname_t; 537 538 /* 539 * name service globals and prototypes 540 */ 541 542 extern struct devname_ops *devname_ns_ops; 543 extern int devname_nsmaps_loaded; 544 extern kmutex_t devname_nsmaps_lock; 545 546 extern void sdev_invalidate_nsmaps(void); 547 extern void sdev_validate_nsmaps(void); 548 extern int sdev_module_register(char *, struct devname_ops *); 549 extern struct devname_nsmap *sdev_get_nsmap_by_dir(char *, int); 550 extern struct devname_nsmap *sdev_get_nsmap_by_module(char *); 551 extern void sdev_dispatch_to_nsrdr_thread(struct sdev_node *, char *, 552 devname_rdr_result_t *); 553 extern void sdev_insert_nsmap(char *, char *, char *); 554 extern int devname_nsmap_lookup(devname_lkp_arg_t *, devname_lkp_result_t **); 555 extern struct devname_nsmap *sdev_get_map(struct sdev_node *, int); 556 extern int sdev_nsmaps_loaded(void); 557 extern void sdev_replace_nsmap(struct devname_nsmap *, char *, char *); 558 extern int sdev_nsmaps_reloaded(void); 559 extern int devname_get_dir_nsmap(devname_handle_t *, struct devname_nsmap **); 560 561 /* 562 * vnodeops and vfsops helpers 563 */ 564 565 typedef enum { 566 SDEV_CACHE_ADD = 0, 567 SDEV_CACHE_DELETE 568 } sdev_cache_ops_t; 569 570 extern struct sdev_node *sdev_cache_lookup(struct sdev_node *, char *); 571 extern int sdev_cache_update(struct sdev_node *, struct sdev_node **, char *, 572 sdev_cache_ops_t); 573 extern void sdev_node_cache_init(void); 574 extern void sdev_node_cache_fini(void); 575 extern struct sdev_node *sdev_mkroot(struct vfs *, dev_t, struct vnode *, 576 struct vnode *, struct cred *); 577 extern int sdev_mknode(struct sdev_node *, char *, struct sdev_node **, 578 struct vattr *, struct vnode *, void *, struct cred *, sdev_node_state_t); 579 extern int sdev_nodeinit(struct sdev_node *, char *, struct sdev_node **, 580 vattr_t *); 581 extern int sdev_nodeready(struct sdev_node *, vattr_t *, vnode_t *, void *, 582 cred_t *); 583 extern int sdev_shadow_node(struct sdev_node *, struct cred *); 584 extern void sdev_nodedestroy(struct sdev_node *, uint_t); 585 extern void sdev_update_timestamps(struct vnode *, cred_t *, uint_t); 586 extern void sdev_vattr_merge(struct sdev_node *, struct vattr *); 587 extern void sdev_devstate_change(void); 588 extern int sdev_lookup_filter(sdev_node_t *, char *); 589 extern void sdev_lookup_failed(sdev_node_t *, char *, int); 590 extern int sdev_unlocked_access(void *, int, struct cred *); 591 592 #define SDEV_ENFORCE 0x1 593 extern void sdev_stale(struct sdev_node *); 594 extern int sdev_cleandir(struct sdev_node *, char *, uint_t); 595 extern int sdev_rnmnode(struct sdev_node *, struct sdev_node *, 596 struct sdev_node *, struct sdev_node **, char *, struct cred *); 597 extern size_t add_dir_entry(dirent64_t *, char *, size_t, ino_t, offset_t); 598 extern int sdev_to_vp(struct sdev_node *, struct vnode **); 599 extern ino_t sdev_mkino(struct sdev_node *); 600 extern int devname_backstore_lookup(struct sdev_node *, char *, 601 struct vnode **); 602 extern int sdev_is_devfs_node(char *); 603 extern int sdev_copyin_mountargs(struct mounta *, struct sdev_mountargs *); 604 extern int sdev_reserve_subdirs(struct sdev_node *); 605 extern int prof_lookup(); 606 extern void prof_filldir(struct sdev_node *); 607 extern int devpts_validate(struct sdev_node *dv); 608 extern void *sdev_get_vtor(struct sdev_node *dv); 609 610 /* 611 * devinfo helpers 612 */ 613 extern int sdev_modctl_readdir(const char *, char ***, int *, int *); 614 extern void sdev_modctl_readdir_free(char **, int, int); 615 extern int sdev_modctl_devexists(const char *); 616 617 618 /* 619 * ncache handlers 620 */ 621 622 extern void sdev_ncache_init(void); 623 extern void sdev_ncache_setup(void); 624 extern void sdev_ncache_teardown(void); 625 extern void sdev_nc_addname(sdev_nc_list_t *, sdev_node_t *, char *, int); 626 extern void sdev_nc_node_exists(sdev_node_t *); 627 extern void sdev_nc_path_exists(sdev_nc_list_t *, char *); 628 extern void sdev_modctl_dump_files(void); 629 630 /* 631 * globals 632 */ 633 extern kmutex_t sdev_lock; 634 extern int devtype; 635 extern kmem_cache_t *sdev_node_cache; 636 extern struct vnodeops *sdev_vnodeops; 637 extern struct vnodeops *devpts_vnodeops; 638 extern struct sdev_data *sdev_origins; /* mount info for global /dev instance */ 639 extern const fs_operation_def_t sdev_vnodeops_tbl[]; 640 extern const fs_operation_def_t devpts_vnodeops_tbl[]; 641 extern const fs_operation_def_t devsys_vnodeops_tbl[]; 642 extern const fs_operation_def_t devpseudo_vnodeops_tbl[]; 643 644 extern sdev_nc_list_t *sdev_ncache; 645 extern int sdev_reconfig_boot; 646 extern int sdev_boot_state; 647 extern int sdev_reconfig_verbose; 648 extern int sdev_reconfig_disable; 649 extern int sdev_nc_disable; 650 extern int sdev_nc_disable_reset; 651 extern int sdev_nc_verbose; 652 653 /* 654 * misc. defines 655 */ 656 #ifdef DEBUG 657 extern int sdev_debug; 658 #define SDEV_DEBUG 0x01 /* error messages to console/log */ 659 #define SDEV_DEBUG_VOPS 0x02 /* vnode ops errors */ 660 #define SDEV_DEBUG_DLF 0x04 /* trace devname_lookup_func */ 661 #define SDEV_DEBUG_DRF 0x08 /* trace devname_readdir_func */ 662 #define SDEV_DEBUG_NCACHE 0x10 /* negative cache tracing */ 663 #define SDEV_DEBUG_DEVFSADMD 0x20 /* comm. of devnamefs & devfsadm */ 664 #define SDEV_DEBUG_PTS 0x40 /* /dev/pts tracing */ 665 #define SDEV_DEBUG_RECONFIG 0x80 /* events triggering reconfig */ 666 #define SDEV_DEBUG_SDEV_NODE 0x100 /* trace sdev_node activities */ 667 #define SDEV_DEBUG_PROFILE 0x200 /* trace sdev_profile */ 668 #define SDEV_DEBUG_MODCTL 0x400 /* trace modctl activity */ 669 #define SDEV_DEBUG_FLK 0x800 /* trace failed lookups */ 670 671 #define sdcmn_err(args) if (sdev_debug & SDEV_DEBUG) printf args 672 #define sdcmn_err2(args) if (sdev_debug & SDEV_DEBUG_VOPS) printf args 673 #define sdcmn_err3(args) if (sdev_debug & SDEV_DEBUG_DLF) printf args 674 #define sdcmn_err4(args) if (sdev_debug & SDEV_DEBUG_DRF) printf args 675 #define sdcmn_err5(args) if (sdev_debug & SDEV_DEBUG_NCACHE) printf args 676 #define sdcmn_err6(args) if (sdev_debug & SDEV_DEBUG_DEVFSADMD) printf args 677 #define sdcmn_err7(args) if (sdev_debug & SDEV_DEBUG_PTS) printf args 678 #define sdcmn_err8(args) if (sdev_debug & SDEV_DEBUG_RECONFIG) printf args 679 #define sdcmn_err9(args) if (sdev_debug & SDEV_DEBUG_SDEV_NODE) printf args 680 #define sdcmn_err10(args) if (sdev_debug & SDEV_DEBUG_PROFILE) printf args 681 #define sdcmn_err11(args) if (sdev_debug & SDEV_DEBUG_MODCTL) printf args 682 #define impossible(args) printf args 683 #else 684 #define sdcmn_err(args) /* does nothing */ 685 #define sdcmn_err2(args) /* does nothing */ 686 #define sdcmn_err3(args) /* does nothing */ 687 #define sdcmn_err4(args) /* does nothing */ 688 #define sdcmn_err5(args) /* does nothing */ 689 #define sdcmn_err6(args) /* does nothing */ 690 #define sdcmn_err7(args) /* does nothing */ 691 #define sdcmn_err8(args) /* does nothing */ 692 #define sdcmn_err9(args) /* does nothing */ 693 #define sdcmn_err10(args) /* does nothing */ 694 #define sdcmn_err11(args) /* does nothing */ 695 #define impossible(args) /* does nothing */ 696 #endif 697 698 #ifdef DEBUG 699 #define SD_TRACE_FAILED_LOOKUP(ddv, nm, retried) \ 700 if ((sdev_debug & SDEV_DEBUG_FLK) || \ 701 ((retried) && (sdev_debug & SDEV_DEBUG_RECONFIG))) { \ 702 printf("lookup of %s/%s by %s failed, line %d\n", \ 703 (ddv)->sdev_name, (nm), curproc->p_user.u_comm, \ 704 __LINE__); \ 705 } 706 #else 707 #define SD_TRACE_FAILED_LOOKUP(ddv, nm, retried) 708 #endif 709 710 #endif /* _KERNEL */ 711 712 #ifdef __cplusplus 713 } 714 #endif 715 716 #endif /* _SYS_SDEV_IMPL_H */ 717