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 1.12 2008/03/18 05:21:53 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 int NumVolumes; 101 extern int RootVolNo; 102 extern struct volume_list VolList; 103 104 uint32_t crc32(const void *buf, size_t size); 105 106 struct volume_info *setup_volume(int32_t vol_no, const char *filename, 107 int isnew, int oflags); 108 struct volume_info *get_volume(int32_t vol_no); 109 struct buffer_info *get_buffer(hammer_off_t buf_offset, int isnew); 110 void *get_buffer_data(hammer_off_t buf_offset, struct buffer_info **bufferp, 111 int isnew); 112 hammer_node_ondisk_t get_node(hammer_off_t node_offset, 113 struct buffer_info **bufp); 114 115 void rel_volume(struct volume_info *volume); 116 void rel_buffer(struct buffer_info *buffer); 117 118 hammer_off_t blockmap_lookup(hammer_off_t bmap_off, 119 struct hammer_blockmap_layer1 *layer1, 120 struct hammer_blockmap_layer2 *layer2); 121 void format_blockmap(hammer_blockmap_t blockmap, hammer_off_t zone_off); 122 void format_undomap(hammer_volume_ondisk_t ondisk); 123 124 void *alloc_btree_element(hammer_off_t *offp); 125 hammer_record_ondisk_t alloc_record_element(hammer_off_t *offp, 126 int32_t data_len, void **datap); 127 int hammer_btree_cmp(hammer_base_elm_t key1, hammer_base_elm_t key2); 128 129 130 void format_freemap(struct volume_info *root_vol, hammer_blockmap_t blockmap); 131 int64_t initialize_freemap(struct volume_info *vol); 132 133 void flush_all_volumes(void); 134 void flush_volume(struct volume_info *vol); 135 void flush_buffer(struct buffer_info *buf); 136 137 void hammer_cache_add(struct cache_info *cache, enum cache_type type); 138 void hammer_cache_del(struct cache_info *cache); 139 void hammer_cache_flush(void); 140 141 void panic(const char *ctl, ...); 142 143