share/examples/puffs/dtfs/dtfs.h

   1 /*      $NetBSD: dtfs.h,v 1.20 2007/07/27 08:29:10 pooka Exp $  */
   2
   3 /*
   4  * Copyright (c) 2006  Antti Kantee.  All Rights Reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 #ifndef DTFS_H_
  29 #define DTFS_H_
  30
  31 #include <sys/types.h>
  32
  33 #include <puffs.h>
  34
  35 PUFFSOP_PROTOS(dtfs);
  36 int     dtfs_domount(struct puffs_usermount *, const char *);
  37
  38 #define DTFS_BLOCKSHIFT (12)
  39 #define DTFS_BLOCKSIZE  (1<<DTFS_BLOCKSHIFT)
  40
  41 #define ROUNDUP(a,b) ((a) & ((b)-1))
  42 #define BLOCKNUM(a,b) (((a) & ~((1<<(b))-1)) >> (b))
  43
  44 struct dtfs_fid;
  45 struct dtfs_mount {
  46         ino_t           dtm_nextfileid; /* running number for file id   */
  47
  48         size_t          dtm_fsizes;     /* sum of file sizes in bytes   */
  49         fsfilcnt_t      dtm_nfiles;     /* number of files              */
  50
  51         LIST_HEAD(, dtfs_poll) dtm_pollent;
  52         int             dtm_needwakeup;
  53         vm_prot_t       dtm_allowprot;
  54 };
  55
  56 struct dtfs_file {
  57         union {
  58                 struct {
  59                         uint8_t **blocks;
  60                         size_t numblocks;
  61                         size_t datalen;
  62                 } reg;
  63                 struct {
  64                         struct puffs_node *dotdot;
  65                         LIST_HEAD(, dtfs_dirent) dirents;
  66                 } dir;
  67                 struct {
  68                         char *target;
  69                 } link;
  70         } u;
  71 #define df_blocks u.reg.blocks
  72 #define df_numblocks u.reg.numblocks
  73 #define df_datalen u.reg.datalen
  74 #define df_dotdot u.dir.dotdot
  75 #define df_dirents u.dir.dirents
  76 #define df_linktarget u.link.target
  77 };
  78
  79 struct dtfs_dirent {
  80         struct puffs_node *dfd_node;
  81         struct puffs_node *dfd_parent;
  82         char *dfd_name;
  83         size_t dfd_namelen;
  84
  85         LIST_ENTRY(dtfs_dirent) dfd_entries;
  86 };
  87
  88 struct dtfs_fid {
  89         struct puffs_node       *dfid_addr;
  90
  91         /* best^Wsome-effort extra sanity check */
  92         ino_t                   dfid_fileid;
  93         u_long                  dfid_gen;
  94 };
  95 #define DTFS_FIDSIZE (sizeof(struct dtfs_fid))
  96
  97 struct dtfs_poll {
  98         struct puffs_cc *dp_pcc;
  99         LIST_ENTRY(dtfs_poll) dp_entries;
 100 };
 101
 102 struct puffs_node *     dtfs_genfile(struct puffs_node *,
 103                                      const struct puffs_cn *, enum vtype);
 104 struct dtfs_file *      dtfs_newdir(void);
 105 struct dtfs_file *      dtfs_newfile(void);
 106 struct dtfs_dirent *    dtfs_dirgetnth(struct dtfs_file *, int);
 107 struct dtfs_dirent *    dtfs_dirgetbyname(struct dtfs_file *,
 108                                           const char *, size_t);
 109
 110 void                    dtfs_nukenode(struct puffs_node *, struct puffs_node *,
 111                                       const char *, size_t);
 112 void                    dtfs_freenode(struct puffs_node *);
 113 void                    dtfs_setsize(struct puffs_node *, off_t);
 114
 115 void    dtfs_adddent(struct puffs_node *, struct dtfs_dirent *);
 116 void    dtfs_removedent(struct puffs_node *, struct dtfs_dirent *);
 117
 118 void    dtfs_baseattrs(struct vattr *, enum vtype, ino_t);
 119 void    dtfs_updatetimes(struct puffs_node *, int, int, int);
 120
 121
 122 #define DTFS_CTOF(a) ((struct dtfs_file *)(((struct puffs_node *)a)->pn_data))
 123 #define DTFS_PTOF(a) ((struct dtfs_file *)(a->pn_data))
 124
 125 #endif /* DTFS_H_ */