sbin/hammer/hammer_util.h

   1 /*
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sbin/hammer/hammer_util.h,v 1.13 2008/04/27 00:43:55 dillon Exp $
  35  */
  36
  37 #include <sys/types.h>
  38 #include <sys/tree.h>
  39 #include <sys/queue.h>
  40
  41 #include <vfs/hammer/hammer_disk.h>
  42 #include <uuid.h>
  43
  44 /*
  45  * Cache management - so the user code can keep its memory use under control
  46  */
  47 struct volume_info;
  48 struct buffer_info;
  49
  50 TAILQ_HEAD(volume_list, volume_info);
  51
  52 struct cache_info {
  53         TAILQ_ENTRY(cache_info) entry;
  54         union {
  55                 struct volume_info *volume;
  56                 struct buffer_info *buffer;
  57         } u;
  58         enum cache_type { ISVOLUME, ISBUFFER } type;
  59         int refs;       /* structural references */
  60         int modified;   /* ondisk modified flag */
  61         int delete;     /* delete flag - delete on last ref */
  62 };
  63
  64 /*
  65  * These structures are used by newfs_hammer to track the filesystem
  66  * buffers it constructs while building the filesystem.  No attempt
  67  * is made to try to make this efficient.
  68  */
  69 struct volume_info {
  70         struct cache_info       cache;
  71         TAILQ_ENTRY(volume_info) entry;
  72         int                     vol_no;
  73         hammer_off_t            vol_alloc;      /* volume-relative offset */
  74         hammer_off_t            vol_free_off;   /* zone-2 offset */
  75         hammer_off_t            vol_free_end;   /* zone-2 offset */
  76
  77         char                    *name;
  78         int                     fd;
  79         off_t                   size;
  80         const char              *type;
  81
  82         struct hammer_volume_ondisk *ondisk;
  83
  84         TAILQ_HEAD(, buffer_info) buffer_list;
  85 };
  86
  87 struct buffer_info {
  88         struct cache_info       cache;
  89         TAILQ_ENTRY(buffer_info) entry;
  90         hammer_off_t            buf_offset;     /* full hammer offset spec */
  91         int64_t                 buf_disk_offset;/* relative to blkdev */
  92         struct volume_info      *volume;
  93         void                    *ondisk;
  94 };
  95
  96 extern uuid_t Hammer_FSType;
  97 extern uuid_t Hammer_FSId;
  98 extern int64_t BootAreaSize;
  99 extern int64_t MemAreaSize;
 100 extern int64_t UndoBufferSize;
 101 extern int NumVolumes;
 102 extern int RootVolNo;
 103 extern struct volume_list VolList;
 104
 105 uint32_t crc32(const void *buf, size_t size);
 106
 107 struct volume_info *setup_volume(int32_t vol_no, const char *filename,
 108                                 int isnew, int oflags);
 109 struct volume_info *get_volume(int32_t vol_no);
 110 struct buffer_info *get_buffer(hammer_off_t buf_offset, int isnew);
 111 void *get_buffer_data(hammer_off_t buf_offset, struct buffer_info **bufferp,
 112                                 int isnew);
 113 hammer_node_ondisk_t get_node(hammer_off_t node_offset,
 114                                 struct buffer_info **bufp);
 115
 116 void rel_volume(struct volume_info *volume);
 117 void rel_buffer(struct buffer_info *buffer);
 118
 119 hammer_off_t blockmap_lookup(hammer_off_t bmap_off,
 120                                 struct hammer_blockmap_layer1 *layer1,
 121                                 struct hammer_blockmap_layer2 *layer2);
 122 void format_blockmap(hammer_blockmap_t blockmap, hammer_off_t zone_off);
 123 void format_undomap(hammer_volume_ondisk_t ondisk);
 124
 125 void *alloc_btree_element(hammer_off_t *offp);
 126 hammer_record_ondisk_t alloc_record_element(hammer_off_t *offp,
 127                                 int32_t data_len, void **datap);
 128 int hammer_btree_cmp(hammer_base_elm_t key1, hammer_base_elm_t key2);
 129
 130
 131 void format_freemap(struct volume_info *root_vol, hammer_blockmap_t blockmap);
 132 int64_t initialize_freemap(struct volume_info *vol);
 133
 134 void flush_all_volumes(void);
 135 void flush_volume(struct volume_info *vol);
 136 void flush_buffer(struct buffer_info *buf);
 137
 138 void hammer_cache_add(struct cache_info *cache, enum cache_type type);
 139 void hammer_cache_del(struct cache_info *cache);
 140 void hammer_cache_flush(void);
 141
 142 void panic(const char *ctl, ...);
 143