usr/src/uts/common/fs/fs_reparse.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 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _FS_REPARSE_H
  27 #define _FS_REPARSE_H
  28
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 #include <sys/types.h>
  34 #include <sys/param.h>
  35 #ifdef _KERNEL
  36 #include <sys/time.h>
  37 #include <sys/nvpair.h>
  38 #else
  39 #include <libnvpair.h>
  40 #endif
  41
  42 #define FS_REPARSE_TAG_STR              "@{REPARSE"
  43 #define FS_REPARSE_TAG_END_CHAR         '}'
  44 #define FS_REPARSE_TAG_END_STR          "}"
  45 #define FS_TOKEN_START_STR              "@{"
  46 #define FS_TOKEN_END_STR                "}"
  47
  48 #define REPARSED                        "svc:/system/filesystem/reparse:default"
  49 #define MAXREPARSELEN                   MAXPATHLEN
  50 #define REPARSED_DOOR                   "/var/run/reparsed_door"
  51 #define REPARSED_DOORCALL_MAX_RETRY     4
  52
  53 /*
  54  * This structure is shared between kernel code and user reparsed daemon.
  55  * The 'res_len' must be defined as int, and not size_t, for 32-bit reparsed
  56  * binary and 64-bit kernel code to work together.
  57  */
  58 typedef struct reparsed_door_res {
  59         int     res_status;
  60         int     res_len;
  61         char    res_data[1];
  62 } reparsed_door_res_t;
  63
  64 extern nvlist_t *reparse_init(void);
  65 extern void reparse_free(nvlist_t *nvl);
  66 extern int reparse_parse(const char *reparse_data, nvlist_t *nvl);
  67 extern int reparse_validate(const char *reparse_data);
  68
  69 #ifdef _KERNEL
  70 extern int reparse_kderef(const char *svc_type, const char *svc_data,
  71                         char *buf, size_t *bufsz);
  72 extern int reparse_vnode_parse(vnode_t *vp, nvlist_t *nvl);
  73 #else
  74 extern int reparse_add(nvlist_t *nvl, const char *svc_type,
  75                         const char *svc_data);
  76 extern int reparse_remove(nvlist_t *nvl, const char *svc_type);
  77 extern int reparse_unparse(nvlist_t *nvl, char **stringp);
  78 extern int reparse_create(const char *path, const char *data);
  79 extern int reparse_delete(const char *path);
  80 extern int reparse_deref(const char *svc_type, const char *svc_data,
  81                         char *buf, size_t *bufsz);
  82 #endif
  83
  84 #ifdef __cplusplus
  85 }
  86 #endif
  87
  88 #endif  /* _FS_REPARSE_H */