include/sys/fs/sdev_impl.h

   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) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright 2015, 2016 Joyent, Inc.  All rights reserved.
  24  * Copyright (c) 2014, 2017 by Delphix. All rights reserved.
  25  */
  26
  27 #ifndef _SYS_SDEV_IMPL_H
  28 #define _SYS_SDEV_IMPL_H
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 #include <rpc/rpc.h>
  35 #include <sys/dirent.h>
  36 #include <sys/vfs.h>
  37 #include <sys/vfs.h>
  38 #include <sys/pathname.h>
  39 #include <sys/list.h>
  40 #include <sys/nvpair.h>
  41 #include <sys/sunddi.h>
  42
  43 /*
  44  * sdev_nodes are the file-system specific part of the
  45  * vnodes for the device filesystem.
  46  *
  47  * The device filesystem exports two node types:
  48  *
  49  * VDIR nodes           to represent directories
  50  * VCHR & VBLK nodes    to represent devices
  51  */
  52
  53 /*
  54  * /dev mount arguments
  55  */
  56 struct sdev_mountargs {
  57         uint64_t sdev_attrdir;
  58 };
  59
  60
  61 /*
  62  * Nvpair names of profile information (list of device files available) of
  63  * non-global /dev mounts.  These strings must be unique among them.
  64  */
  65 #define SDEV_NVNAME_MOUNTPT     "prof_mountpt"
  66 #define SDEV_NVNAME_INCLUDE     "prof_include"
  67 #define SDEV_NVNAME_EXCLUDE     "prof_exclude"
  68 #define SDEV_NVNAME_SYMLINK     "prof_symlink"
  69 #define SDEV_NVNAME_MAP         "prof_map"
  70
  71 /*
  72  * supported devfsadm_cmd
  73  */
  74 #define DEVFSADMD_RUN_ALL       1
  75
  76 /*
  77  * devfsadm_error codes
  78  */
  79 #define DEVFSADM_RUN_INVALID            1
  80 #define DEVFSADM_RUN_EPERM              2
  81 #define DEVFSADM_RUN_NOTSUP             3
  82
  83 /*
  84  * devfsadm/devname door data structures
  85  */
  86 typedef struct sdev_door_arg {
  87         uint8_t devfsadm_cmd;   /* what to do for devfsadm[d] */
  88 } sdev_door_arg_t;
  89
  90 typedef struct sdev_door_res {
  91         int32_t devfsadm_error;
  92 } sdev_door_res_t;
  93
  94 #ifdef _KERNEL
  95
  96 struct sdev_dprof {
  97         int has_glob;
  98         nvlist_t *dev_name;
  99         nvlist_t *dev_map;
 100         nvlist_t *dev_symlink;
 101         nvlist_t *dev_glob_incdir;
 102         nvlist_t *dev_glob_excdir;
 103 };
 104
 105 /*
 106  * devname_handle_t
 107  */
 108 struct devname_handle {
 109         struct sdev_node *dh_data;      /* the sdev_node */
 110         void    *dh_args;
 111 };
 112 typedef struct devname_handle devname_handle_t;
 113
 114 /*
 115  * Per-instance node data for the global zone instance
 116  * Only one mount of /dev in the global zone
 117  */
 118 typedef struct sdev_global_data {
 119         struct devname_handle sdev_ghandle;
 120         ulong_t         sdev_dir_ggen;          /* name space generation # */
 121 } sdev_global_data_t;
 122
 123 /*
 124  * Per-instance node data - profile data per non-global zone mount instance
 125  */
 126 typedef struct sdev_local_data {
 127         ulong_t sdev_dir_lgen;          /* cached generation # of /dev dir */
 128         ulong_t sdev_devtree_lgen;      /* cached generation # of devtree */
 129         struct sdev_node *sdev_lorigin; /* corresponding global sdev_node */
 130         struct sdev_dprof sdev_lprof;   /* profile for multi-inst */
 131 } sdev_local_data_t;
 132
 133 /*
 134  * /dev filesystem sdev_node defines
 135  */
 136 typedef struct sdev_node {
 137         char            *sdev_name;     /* node name */
 138         size_t          sdev_namelen;   /* strlen(sdev_name) */
 139         char            *sdev_path;     /* absolute path */
 140         char            *sdev_symlink;  /* source for a symlink */
 141         struct vnode    *sdev_vnode;    /* vnode */
 142
 143         krwlock_t       sdev_contents;  /* rw lock for this data structure */
 144         struct sdev_node *sdev_dotdot;  /* parent */
 145
 146         avl_tree_t      sdev_entries;   /* VDIR: contents as avl tree */
 147         avl_node_t      sdev_avllink;   /* avl node linkage */
 148
 149         struct vnode    *sdev_attrvp;   /* backing store vnode if persisted */
 150         struct vattr    *sdev_attr;     /* memory copy of the vattr */
 151
 152         ino64_t         sdev_ino;       /* inode */
 153         uint_t          sdev_nlink;     /* link count */
 154         int             sdev_state;     /* state of this node */
 155         int             sdev_flags;     /* flags bit */
 156
 157         kmutex_t        sdev_lookup_lock; /* node creation synch lock */
 158         kcondvar_t      sdev_lookup_cv; /* node creation sync cv */
 159         int             sdev_lookup_flags; /* node creation flags */
 160
 161         /* per-instance data, either global or non-global zone */
 162         union {
 163                 struct sdev_global_data sdev_globaldata;
 164                 struct sdev_local_data  sdev_localdata;
 165         } sdev_instance_data;
 166
 167         void            *sdev_private;
 168 } sdev_node_t;
 169
 170 #define sdev_ldata sdev_instance_data.sdev_localdata
 171 #define sdev_gdata sdev_instance_data.sdev_globaldata
 172
 173 #define sdev_handle             sdev_gdata.sdev_ghandle
 174 #define sdev_gdir_gen           sdev_gdata.sdev_dir_ggen
 175
 176 #define sdev_ldir_gen           sdev_ldata.sdev_dir_lgen
 177 #define sdev_devtree_gen        sdev_ldata.sdev_devtree_lgen
 178 #define sdev_origin             sdev_ldata.sdev_lorigin
 179 #define sdev_prof               sdev_ldata.sdev_lprof
 180
 181 /*
 182  * Directory contents traversal
 183  */
 184 #define SDEV_FIRST_ENTRY(ddv)           avl_first(&(ddv)->sdev_entries)
 185 #define SDEV_NEXT_ENTRY(ddv, dv)        AVL_NEXT(&(ddv)->sdev_entries, (dv))
 186
 187 /*
 188  * See the big theory statement in sdev_vnops.c for an explanation of these
 189  * states.
 190  */
 191 typedef enum {
 192         SDEV_ZOMBIE = -1,
 193         SDEV_INIT = 0,
 194         SDEV_READY
 195 } sdev_node_state_t;
 196
 197 /* sdev_flags */
 198 #define SDEV_BUILD              0x0001  /* directory cache out-of-date */
 199 #define SDEV_GLOBAL             0x0002  /* global /dev nodes */
 200 #define SDEV_PERSIST            0x0004  /* backing store persisted node */
 201 #define SDEV_NO_NCACHE          0x0008  /* do not include in neg. cache */
 202 #define SDEV_DYNAMIC            0x0010  /* special-purpose vnode ops */
 203                                         /* (ex: pts) */
 204 #define SDEV_VTOR               0x0020  /* validate sdev_nodes during search */
 205 #define SDEV_ATTR_INVALID       0x0040  /* invalid node attributes, */
 206                                         /* need update */
 207 #define SDEV_SUBDIR             0x0080  /* match all subdirs under here */
 208 #define SDEV_ZONED              0x0100  /* zoned subdir */
 209
 210 /* sdev_lookup_flags */
 211 #define SDEV_LOOKUP     0x0001  /* node creation in progress */
 212 #define SDEV_READDIR    0x0002  /* VDIR readdir in progress */
 213 #define SDEV_LGWAITING  0x0004  /* waiting for devfsadm completion */
 214
 215 #define SDEV_VTOR_INVALID       -1
 216 #define SDEV_VTOR_SKIP          0
 217 #define SDEV_VTOR_VALID         1
 218 #define SDEV_VTOR_STALE         2
 219
 220 /* convenient macros */
 221 #define SDEV_IS_GLOBAL(dv)      \
 222         (dv->sdev_flags & SDEV_GLOBAL)
 223 #define SDEV_IS_PERSIST(dv)     \
 224         (dv->sdev_flags & SDEV_PERSIST)
 225 #define SDEV_IS_DYNAMIC(dv)     \
 226         (dv->sdev_flags & SDEV_DYNAMIC)
 227 #define SDEV_IS_NO_NCACHE(dv)   \
 228         (dv->sdev_flags & SDEV_NO_NCACHE)
 229 #define SDEV_IS_LOOKUP(dv)      \
 230         (dv->sdev_lookup_flags & SDEV_LOOKUP)
 231 #define SDEV_IS_READDIR(dv)     \
 232         (dv->sdev_lookup_flags & SDEV_READDIR)
 233 #define SDEV_IS_LGWAITING(dv)   \
 234         (dv->sdev_lookup_flags  & SDEV_LGWAITING)
 235
 236 #define SDEVTOV(n)      ((struct vnode *)(n)->sdev_vnode)
 237 #define VTOSDEV(vp)     ((struct sdev_node *)(vp)->v_data)
 238 #define VN_HELD(v)      ((v)->v_count != 0)
 239 #define SDEV_HELD(dv)   (VN_HELD(SDEVTOV(dv)))
 240 #define SDEV_HOLD(dv)   VN_HOLD(SDEVTOV(dv))
 241 #define SDEV_RELE(dv)   VN_RELE(SDEVTOV(dv))
 242 #define SDEV_SIMPLE_RELE(dv)    {       \
 243         struct vnode *vp = SDEVTOV(dv); \
 244         mutex_enter(&vp->v_lock);       \
 245         VN_RELE_LOCKED(vp);             \
 246         mutex_exit(&vp->v_lock);        \
 247 }
 248
 249 #define SDEV_ACL_FLAVOR(vp)     (VFSTOSDEVFS(vp->v_vfsp)->sdev_acl_flavor)
 250
 251 /*
 252  * some defaults
 253  */
 254 #define SDEV_ROOTINO            ((ino_t)2)
 255 #define SDEV_UID_DEFAULT        (0)
 256 #define SDEV_GID_DEFAULT        (3)
 257 #define SDEV_DIRMODE_DEFAULT    (S_IFDIR |0755)
 258 #define SDEV_DEVMODE_DEFAULT    (0600)
 259 #define SDEV_LNKMODE_DEFAULT    (S_IFLNK | 0777)
 260
 261 extern struct vattr sdev_vattr_dir;
 262 extern struct vattr sdev_vattr_lnk;
 263 extern struct vattr sdev_vattr_blk;
 264 extern struct vattr sdev_vattr_chr;
 265
 266 /*
 267  * devname_lookup_func()
 268  */
 269 extern int devname_lookup_func(struct sdev_node *, char *, struct vnode **,
 270     struct cred *, int (*)(struct sdev_node *, char *, void **, struct cred *,
 271     void *, char *), int);
 272
 273 /*
 274  * flags used by devname_lookup_func callbacks
 275  */
 276 #define SDEV_VATTR      0x4     /* callback returning node vattr */
 277 #define SDEV_VLINK      0x8     /* callback returning /dev link */
 278
 279 /*
 280  * devname_readdir_func()
 281  */
 282 extern int devname_readdir_func(vnode_t *, uio_t *, cred_t *, int *, int);
 283
 284 /*
 285  * flags for devname_readdir_func
 286  */
 287 #define SDEV_BROWSE     0x1     /* fetch all entries from backing store */
 288
 289 /*
 290  * devname_setattr_func()
 291  */
 292 extern int devname_setattr_func(struct vnode *, struct vattr *, int,
 293     struct cred *, int (*)(struct sdev_node *, struct vattr *, int), int);
 294 /*
 295  * devname_inactive_func()
 296  */
 297 extern void devname_inactive_func(struct vnode *, struct cred *,
 298     void (*)(struct vnode *));
 299
 300 /*
 301  * /dev file system instance defines
 302  */
 303 /*
 304  * /dev version of vfs_data
 305  */
 306 struct sdev_data {
 307         struct sdev_data        *sdev_prev;
 308         struct sdev_data        *sdev_next;
 309         struct sdev_node        *sdev_root;
 310         struct vfs              *sdev_vfsp;
 311         struct sdev_mountargs   *sdev_mountargs;
 312         ulong_t                 sdev_acl_flavor;
 313 };
 314
 315 #define VFSTOSDEVFS(vfsp)       ((struct sdev_data *)((vfsp)->vfs_data))
 316
 317 /*
 318  * sdev_fid overlays the fid structure (for VFS_VGET)
 319  */
 320 struct sdev_fid {
 321         uint16_t        sdevfid_len;
 322         uint32_t        sdevfid_ino;
 323         int32_t         sdevfid_gen;
 324 };
 325
 326 /*
 327  * devfsadm and devname communication defines
 328  */
 329 typedef enum {
 330         DEVNAME_DEVFSADM_STOPPED = 0,   /* devfsadm has never run */
 331         DEVNAME_DEVFSADM_RUNNING,       /* devfsadm is running */
 332         DEVNAME_DEVFSADM_RUN            /* devfsadm ran once */
 333 } devname_devfsadm_state_t;
 334
 335 extern volatile uint_t  devfsadm_state; /* atomic mask for devfsadm status */
 336
 337 #define DEVNAME_DEVFSADM_SET_RUNNING(devfsadm_state)    \
 338         (devfsadm_state = DEVNAME_DEVFSADM_RUNNING)
 339 #define DEVNAME_DEVFSADM_SET_STOP(devfsadm_state)       \
 340         (devfsadm_state = DEVNAME_DEVFSADM_STOPPED)
 341 #define DEVNAME_DEVFSADM_SET_RUN(devfsadm_state)        \
 342         (devfsadm_state = DEVNAME_DEVFSADM_RUN)
 343 #define DEVNAME_DEVFSADM_IS_RUNNING(devfsadm_state)     \
 344         (devfsadm_state == DEVNAME_DEVFSADM_RUNNING)
 345 #define DEVNAME_DEVFSADM_HAS_RUN(devfsadm_state)        \
 346         (devfsadm_state == DEVNAME_DEVFSADM_RUN)
 347
 348 #define SDEV_BLOCK_OTHERS(dv, cmd)      {       \
 349         ASSERT(MUTEX_HELD(&dv->sdev_lookup_lock));      \
 350         dv->sdev_lookup_flags |= cmd;                   \
 351 }
 352 extern void sdev_unblock_others(struct sdev_node *, uint_t);
 353 #define SDEV_UNBLOCK_OTHERS(dv, cmd)    {       \
 354         sdev_unblock_others(dv, cmd);           \
 355 }
 356
 357 #define SDEV_CLEAR_LOOKUP_FLAGS(dv, cmd)        {       \
 358         dv->sdev_lookup_flags &= ~cmd;  \
 359 }
 360
 361 extern int sdev_wait4lookup(struct sdev_node *, int);
 362 extern int devname_filename_register(char *);
 363 extern int devname_nsmaps_register(char *, size_t);
 364 extern void sdev_devfsadm_lockinit(void);
 365 extern void sdev_devfsadm_lockdestroy(void);
 366 extern void devname_add_devfsadm_node(char *);
 367 extern void sdev_devfsadmd_thread(struct sdev_node *, struct sdev_node *,
 368     struct cred *);
 369 extern int devname_profile_update(char *, size_t);
 370 extern struct sdev_data *sdev_find_mntinfo(char *);
 371 void sdev_mntinfo_rele(struct sdev_data *);
 372 extern const struct vnodeops *devpts_getvnodeops(void);
 373 extern const struct vnodeops *devvt_getvnodeops(void);
 374
 375 /*
 376  * boot states - warning, the ordering here is significant
 377  *
 378  * the difference between "system available" and "boot complete"
 379  * is a debounce timeout to catch some daemon issuing a readdir
 380  * triggering a nuisance implict reconfig on each boot.
 381  */
 382 #define SDEV_BOOT_STATE_INITIAL         0
 383 #define SDEV_BOOT_STATE_RECONFIG        1       /* reconfig */
 384 #define SDEV_BOOT_STATE_SYSAVAIL        2       /* system available */
 385 #define SDEV_BOOT_STATE_COMPLETE        3       /* boot complete */
 386
 387 /*
 388  * Negative cache list and list element
 389  * The mutex protects the flags against multiple accesses and
 390  * must only be acquired when already holding the r/w lock.
 391  */
 392 typedef struct sdev_nc_list {
 393         list_t          ncl_list;       /* the list itself */
 394         kmutex_t        ncl_mutex;      /* protects ncl_flags */
 395         krwlock_t       ncl_lock;       /* protects ncl_list */
 396         int             ncl_flags;
 397         int             ncl_nentries;
 398 } sdev_nc_list_t;
 399
 400 typedef struct sdev_nc_node {
 401         char            *ncn_name;      /* name of the node */
 402         int             ncn_flags;      /* state information */
 403         int             ncn_expirecnt;  /* remove once expired */
 404         list_node_t     ncn_link;       /* link to next in list */
 405 } sdev_nc_node_t;
 406
 407 /* ncl_flags */
 408 #define NCL_LIST_DIRTY          0x01    /* needs to be flushed */
 409 #define NCL_LIST_WRITING        0x02    /* write in progress */
 410 #define NCL_LIST_WENABLE        0x04    /* write-enabled post boot */
 411
 412 /* ncn_flags */
 413 #define NCN_ACTIVE      0x01    /* a lookup has occurred */
 414 #define NCN_SRC_STORE   0x02    /* src: persistent store */
 415 #define NCN_SRC_CURRENT 0x04    /* src: current boot */
 416
 417 /* sdev_lookup_failed flags */
 418 #define SLF_NO_NCACHE   0x01    /* node should not be added to ncache */
 419 #define SLF_REBUILT     0x02    /* reconfig performed during lookup attempt */
 420
 421 /*
 422  * The nvlist name and nvpair identifiers in the
 423  * /etc/devices/devname_cache nvlist format
 424  */
 425 #define DP_DEVNAME_ID                   "devname"
 426 #define DP_DEVNAME_NCACHE_ID            "ncache"
 427 #define DP_DEVNAME_NC_EXPIRECNT_ID      "expire-counts"
 428
 429 /* devname-cache list element */
 430 typedef struct nvp_devname {
 431         char                    **nvp_paths;
 432         int                     *nvp_expirecnts;
 433         int                     nvp_npaths;
 434         list_node_t             nvp_link;
 435 } nvp_devname_t;
 436
 437 /*
 438  * name service globals and prototypes
 439  */
 440
 441 /*
 442  * vnodeops and vfsops helpers
 443  */
 444
 445 typedef enum {
 446         SDEV_CACHE_ADD = 0,
 447         SDEV_CACHE_DELETE
 448 } sdev_cache_ops_t;
 449
 450 extern struct sdev_node *sdev_cache_lookup(struct sdev_node *, char *);
 451 extern void sdev_cache_update(struct sdev_node *, struct sdev_node **, char *,
 452     sdev_cache_ops_t);
 453 extern void sdev_node_cache_init(void);
 454 extern void sdev_node_cache_fini(void);
 455 extern struct sdev_node *sdev_mkroot(struct vfs *, dev_t, struct vnode *,
 456     struct vnode *, struct cred *);
 457 extern void sdev_filldir_dynamic(struct sdev_node *);
 458 extern int sdev_mknode(struct sdev_node *, char *, struct sdev_node **,
 459     struct vattr *, struct vnode *, void *, struct cred *, sdev_node_state_t);
 460 extern int sdev_getlink(struct vnode *linkvp, char **link);
 461
 462 extern int sdev_nodeinit(struct sdev_node *, char *, struct sdev_node **,
 463     vattr_t *);
 464 extern int sdev_nodeready(struct sdev_node *, vattr_t *, vnode_t *, void *,
 465     cred_t *);
 466 extern int sdev_shadow_node(struct sdev_node *, struct cred *);
 467 extern void sdev_nodedestroy(struct sdev_node *, uint_t);
 468 extern void sdev_update_timestamps(struct vnode *, cred_t *, uint_t);
 469 extern void sdev_vattr_merge(struct sdev_node *, struct vattr *);
 470 extern void sdev_devstate_change(void);
 471 extern int sdev_lookup_filter(sdev_node_t *, char *);
 472 extern void sdev_lookup_failed(sdev_node_t *, char *, int);
 473 extern int sdev_unlocked_access(void *, int, struct cred *);
 474
 475 #define SDEV_ENFORCE    0x1
 476 extern void sdev_stale(struct sdev_node *);
 477 extern int sdev_cleandir(struct sdev_node *, char *, uint_t);
 478 extern int sdev_rnmnode(struct sdev_node *, struct sdev_node *,
 479     struct sdev_node *, struct sdev_node **, char *, struct cred *);
 480 extern size_t add_dir_entry(dirent64_t *, char *, size_t, ino_t, offset_t);
 481 extern struct vattr *sdev_getdefault_attr(enum vtype type);
 482 extern int sdev_to_vp(struct sdev_node *, struct vnode **);
 483 extern ino_t sdev_mkino(struct sdev_node *);
 484 extern int devname_backstore_lookup(struct sdev_node *, char *,
 485     struct vnode **);
 486 extern int sdev_is_devfs_node(char *);
 487 extern int sdev_copyin_mountargs(struct mounta *, struct sdev_mountargs *);
 488 extern int sdev_reserve_subdirs(struct sdev_node *);
 489 extern int prof_lookup();
 490 extern void prof_filldir(struct sdev_node *);
 491 extern int prof_name_matched(char *, struct sdev_node *);
 492 extern int devpts_validate(struct sdev_node *dv);
 493 extern int devnet_validate(struct sdev_node *dv);
 494 extern int devipnet_validate(struct sdev_node *dv);
 495 extern int devvt_validate(struct sdev_node *dv);
 496 extern int devzvol_validate(struct sdev_node *dv);
 497 extern void *sdev_get_vtor(struct sdev_node *dv);
 498
 499 /*
 500  * devinfo helpers
 501  */
 502 extern int sdev_modctl_readdir(const char *, char ***, int *, int *, int);
 503 extern void sdev_modctl_readdir_free(char **, int, int);
 504 extern int sdev_modctl_devexists(const char *);
 505
 506 /*
 507  * ncache handlers
 508  */
 509
 510 extern void sdev_ncache_init(void);
 511 extern void sdev_ncache_setup(void);
 512 extern void sdev_ncache_teardown(void);
 513 extern void sdev_nc_addname(sdev_nc_list_t *, sdev_node_t *, char *, int);
 514 extern void sdev_nc_node_exists(sdev_node_t *);
 515 extern void sdev_nc_path_exists(sdev_nc_list_t *, char *);
 516 extern void sdev_modctl_dump_files(void);
 517
 518 /*
 519  * globals
 520  */
 521 extern kmutex_t sdev_lock;
 522 extern int devtype;
 523 extern kmem_cache_t *sdev_node_cache;
 524 extern const struct vnodeops    sdev_vnodeops;
 525 extern const struct vnodeops    devpts_vnodeops;
 526 extern const struct vnodeops    devnet_vnodeops;
 527 extern const struct vnodeops    devipnet_vnodeops;
 528 extern const struct vnodeops    devvt_vnodeops;
 529 extern const struct vnodeops    devzvol_vnodeops;
 530 extern struct sdev_data *sdev_origins; /* mount info for global /dev instance */
 531
 532 extern sdev_nc_list_t   *sdev_ncache;
 533 extern int              sdev_reconfig_boot;
 534 extern int              sdev_boot_state;
 535 extern int              sdev_reconfig_verbose;
 536 extern int              sdev_reconfig_disable;
 537 extern int              sdev_nc_disable;
 538 extern int              sdev_nc_disable_reset;
 539 extern int              sdev_nc_verbose;
 540
 541 extern taskq_t          *sdev_taskq;
 542
 543 /*
 544  * misc. defines
 545  */
 546 #ifdef DEBUG
 547 extern int sdev_debug;
 548 #define SDEV_DEBUG              0x01    /* error messages to console/log */
 549 #define SDEV_DEBUG_VOPS         0x02    /* vnode ops errors */
 550 #define SDEV_DEBUG_DLF          0x04    /* trace devname_lookup_func */
 551 #define SDEV_DEBUG_DRF          0x08    /* trace devname_readdir_func */
 552 #define SDEV_DEBUG_NCACHE       0x10    /* negative cache tracing */
 553 #define SDEV_DEBUG_DEVFSADMD    0x20    /* comm. of devnamefs & devfsadm */
 554 #define SDEV_DEBUG_PTS          0x40    /* /dev/pts tracing */
 555 #define SDEV_DEBUG_RECONFIG     0x80    /* events triggering reconfig */
 556 #define SDEV_DEBUG_SDEV_NODE    0x100   /* trace sdev_node activities */
 557 #define SDEV_DEBUG_PROFILE      0x200   /* trace sdev_profile */
 558 #define SDEV_DEBUG_MODCTL       0x400   /* trace modctl activity */
 559 #define SDEV_DEBUG_FLK          0x800   /* trace failed lookups */
 560 #define SDEV_DEBUG_NET          0x1000  /* /dev/net tracing */
 561 #define SDEV_DEBUG_ZVOL         0x2000  /* /dev/zvol/tracing */
 562
 563 #define sdcmn_err(args)  if (sdev_debug & SDEV_DEBUG) printf args
 564 #define sdcmn_err2(args) if (sdev_debug & SDEV_DEBUG_VOPS) printf args
 565 #define sdcmn_err3(args) if (sdev_debug & SDEV_DEBUG_DLF) printf args
 566 #define sdcmn_err4(args) if (sdev_debug & SDEV_DEBUG_DRF) printf args
 567 #define sdcmn_err5(args) if (sdev_debug & SDEV_DEBUG_NCACHE) printf args
 568 #define sdcmn_err6(args) if (sdev_debug & SDEV_DEBUG_DEVFSADMD) printf args
 569 #define sdcmn_err7(args) if (sdev_debug & SDEV_DEBUG_PTS) printf args
 570 #define sdcmn_err8(args) if (sdev_debug & SDEV_DEBUG_RECONFIG) printf args
 571 #define sdcmn_err9(args) if (sdev_debug & SDEV_DEBUG_SDEV_NODE) printf args
 572 #define sdcmn_err10(args) if (sdev_debug & SDEV_DEBUG_PROFILE) printf args
 573 #define sdcmn_err11(args) if (sdev_debug & SDEV_DEBUG_MODCTL) printf args
 574 #define sdcmn_err12(args) if (sdev_debug & SDEV_DEBUG_NET) printf args
 575 #define sdcmn_err13(args) if (sdev_debug & SDEV_DEBUG_ZVOL) printf args
 576 #define impossible(args) printf args
 577 #else
 578 #define sdcmn_err(args)         ((void)0)
 579 #define sdcmn_err2(args)        ((void)0)
 580 #define sdcmn_err3(args)        ((void)0)
 581 #define sdcmn_err4(args)        ((void)0)
 582 #define sdcmn_err5(args)        ((void)0)
 583 #define sdcmn_err6(args)        ((void)0)
 584 #define sdcmn_err7(args)        ((void)0)
 585 #define sdcmn_err8(args)        ((void)0)
 586 #define sdcmn_err9(args)        ((void)0)
 587 #define sdcmn_err10(args)       ((void)0)
 588 #define sdcmn_err11(args)       ((void)0)
 589 #define sdcmn_err12(args)       ((void)0)
 590 #define sdcmn_err13(args)       ((void)0)
 591 #define impossible(args)        ((void)0)
 592 #endif
 593
 594 #ifdef DEBUG
 595 #define SD_TRACE_FAILED_LOOKUP(ddv, nm, retried)                        \
 596         if ((sdev_debug & SDEV_DEBUG_FLK) ||                            \
 597             ((retried) && (sdev_debug & SDEV_DEBUG_RECONFIG))) {        \
 598                 printf("lookup of %s/%s by %s failed, line %d\n",       \
 599                     (ddv)->sdev_name, (nm), curproc->p_user.u_comm,     \
 600                     __LINE__);                                          \
 601         }
 602 #else
 603 #define SD_TRACE_FAILED_LOOKUP(ddv, nm, retried)        ((void)0)
 604 #endif
 605
 606 #endif  /* _KERNEL */
 607
 608 #ifdef __cplusplus
 609 }
 610 #endif
 611
 612 #endif  /* _SYS_SDEV_IMPL_H */