2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
35 #ifndef HAMMER_UTIL_H_
36 #define HAMMER_UTIL_H_
38 #include <sys/types.h>
42 #include <sys/queue.h>
43 #include <sys/mount.h>
56 #include <vfs/hammer/hammer_disk.h>
57 #include <vfs/hammer/hammer_ioctl.h>
61 * pidfile management - common definitions so code is more robust
63 #define PIDFILE_BUFSIZE 64
64 static const char pidfile_loc[] = "/var/run";
67 TAILQ_ENTRY(cache_info) entry;
68 int refs; /* structural references */
69 int modified; /* ondisk modified flag */
70 int delete; /* delete flag - delete on last ref */
73 #define HAMMER_BUFLISTS 64
74 #define HAMMER_BUFLISTMASK (HAMMER_BUFLISTS - 1)
77 * These structures are used by hammer(8) and newfs_hammer(8)
78 * to track the filesystem buffers.
81 TAILQ_ENTRY(volume_info) entry;
85 hammer_off_t vol_free_off; /* zone-2 offset */
86 hammer_off_t vol_free_end; /* zone-2 offset */
94 hammer_volume_ondisk_t ondisk;
96 TAILQ_HEAD(, buffer_info) buffer_lists[HAMMER_BUFLISTS];
100 struct cache_info cache; /* must be at offset 0 */
101 TAILQ_ENTRY(buffer_info) entry;
102 hammer_off_t buf_offset; /* full hammer offset spec */
103 int64_t raw_offset; /* physical offset */
104 struct volume_info *volume;
109 * Data structure for zone statistics.
112 int zone; /* zone index, not used */
113 hammer_off_t blocks; /* number of big-blocks */
114 hammer_off_t items; /* number of items */
115 hammer_off_t used; /* bytes used */
118 extern uuid_t Hammer_FSType;
119 extern uuid_t Hammer_FSId;
120 extern int UseReadBehind;
121 extern int UseReadAhead;
123 extern const char *zone_labels[];
125 /* prototypes for sys/libkern/crc32.c */
126 uint32_t crc32(const void *buf, size_t size);
127 uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc);
129 struct volume_info *init_volume(int32_t vol_no, const char *filename,
131 struct volume_info *load_volume(const char *filename, int oflags);
132 void check_volume(struct volume_info *vol);
133 struct volume_info *get_volume(int32_t vol_no);
134 struct volume_info *get_root_volume(void);
135 void *get_buffer_data(hammer_off_t buf_offset, struct buffer_info **bufferp,
137 hammer_node_ondisk_t get_node(hammer_off_t node_offset,
138 struct buffer_info **bufp);
140 void rel_buffer(struct buffer_info *buffer);
142 hammer_off_t alloc_bigblock(struct volume_info *volume, int zone);
143 void *alloc_blockmap(int zone, int bytes, hammer_off_t *result_offp,
144 struct buffer_info **bufferp);
145 hammer_off_t blockmap_lookup(hammer_off_t bmap_off,
146 hammer_blockmap_layer1_t layer1,
147 hammer_blockmap_layer2_t layer2,
149 void format_undomap(struct volume_info *root_vol, int64_t *undo_buffer_size);
151 void *alloc_btree_element(hammer_off_t *offp,
152 struct buffer_info **data_bufferp);
153 void *alloc_meta_element(hammer_off_t *offp, int32_t data_len,
154 struct buffer_info **data_bufferp);
155 void *alloc_data_element(hammer_off_t *offp, int32_t data_len,
156 struct buffer_info **data_bufferp);
158 void format_blockmap(struct volume_info *vol, int zone, hammer_off_t offset);
159 void format_freemap(struct volume_info *root_vol);
160 int64_t initialize_freemap(struct volume_info *vol);
161 int64_t count_freemap(struct volume_info *vol);
162 void print_blockmap(const struct volume_info *root_vol);
164 void flush_all_volumes(void);
165 void flush_volume(struct volume_info *vol);
166 void flush_buffer(struct buffer_info *buf);
168 int64_t init_boot_area_size(int64_t value, off_t avg_vol_size);
169 int64_t init_mem_area_size(int64_t value, off_t avg_vol_size);
171 int hammer_parse_cache_size(const char *arg);
172 void hammer_cache_set(int bytes);
173 void hammer_cache_add(struct cache_info *cache);
174 void hammer_cache_del(struct cache_info *cache);
175 void hammer_cache_used(struct cache_info *cache);
176 void hammer_cache_flush(void);
178 int hammer_btree_cmp(hammer_base_elm_t key1, hammer_base_elm_t key2);
179 void hammer_key_beg_init(hammer_base_elm_t base);
180 void hammer_key_end_init(hammer_base_elm_t base);
181 int hammer_crc_test_leaf(void *data, hammer_btree_leaf_elm_t leaf);
183 const char *sizetostr(off_t size);
184 int hammer_fs_to_vol(const char *fs, struct hammer_ioc_volume_list *iocp);
185 int hammer_fs_to_rootvol(const char *fs, char *buf, int len);
187 struct zone_stat *hammer_init_zone_stat(void);
188 struct zone_stat *hammer_init_zone_stat_bits(void);
189 void hammer_cleanup_zone_stat(struct zone_stat *stats);
190 void hammer_add_zone_stat(struct zone_stat *stats, hammer_off_t offset,
192 void hammer_add_zone_stat_layer2(struct zone_stat *stats,
193 hammer_blockmap_layer2_t layer2);
194 void hammer_print_zone_stat(const struct zone_stat *stats);
196 #endif /* !HAMMER_UTIL_H_ */