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
34 * $DragonFly: src/sbin/newfs_hammer/newfs_hammer.c,v 1.24 2008/05/06 00:15:35 dillon Exp $
37 #include "newfs_hammer.h"
39 static int64_t getsize(const char *str, int64_t minval, int64_t maxval, int pw);
40 static const char *sizetostr(off_t size);
41 static void check_volume(struct volume_info *vol);
42 static void format_volume(struct volume_info *vol, int nvols,const char *label,
44 static hammer_off_t format_root(void);
45 static void usage(void);
48 main(int ac, char **av)
54 const char *label = NULL;
55 struct volume_info *vol;
58 * Sanity check basic filesystem structures. No cookies for us
61 assert(sizeof(struct hammer_volume_ondisk) <= HAMMER_BUFSIZE);
62 assert(sizeof(union hammer_record_ondisk) == HAMMER_RECORD_SIZE);
63 assert(sizeof(struct hammer_blockmap_layer1) == 32);
64 assert(sizeof(struct hammer_blockmap_layer2) == 16);
67 * Generate a filesysem id and lookup the filesystem type
69 uuidgen(&Hammer_FSId, 1);
70 uuid_name_lookup(&Hammer_FSType, "DragonFly HAMMER", &status);
71 if (status != uuid_s_ok) {
72 errx(1, "uuids file does not have the DragonFly "
73 "HAMMER filesystem type");
79 while ((ch = getopt(ac, av, "L:b:m:u:")) != -1) {
85 BootAreaSize = getsize(optarg,
87 HAMMER_BOOT_MAXBYTES, 2);
90 MemAreaSize = getsize(optarg,
92 HAMMER_MEM_MAXBYTES, 2);
95 UndoBufferSize = getsize(optarg,
96 HAMMER_LARGEBLOCK_SIZE,
97 HAMMER_LARGEBLOCK_SIZE *
98 HAMMER_UNDO_LAYER2, 2);
108 "newfs_hammer: A filesystem label must be specified\n");
113 * Collect volume information
121 for (i = 0; i < NumVolumes; ++i) {
122 vol = setup_volume(i, av[i], 1, O_RDWR);
125 * Load up information on the volume and initialize
126 * its remaining fields.
133 * Calculate defaults for the boot and memory area sizes.
135 if (BootAreaSize == 0) {
136 BootAreaSize = HAMMER_BOOT_NOMBYTES;
137 while (BootAreaSize > total / NumVolumes / 256)
139 if (BootAreaSize < HAMMER_BOOT_MINBYTES)
141 } else if (BootAreaSize < HAMMER_BOOT_MINBYTES) {
142 BootAreaSize = HAMMER_BOOT_MINBYTES;
144 if (MemAreaSize == 0) {
145 MemAreaSize = HAMMER_MEM_NOMBYTES;
146 while (MemAreaSize > total / NumVolumes / 256)
148 if (MemAreaSize < HAMMER_MEM_MINBYTES)
150 } else if (MemAreaSize < HAMMER_MEM_MINBYTES) {
151 MemAreaSize = HAMMER_MEM_MINBYTES;
155 * Format the volumes. Format the root volume first so we can
156 * bootstrap the freemap.
158 format_volume(get_volume(RootVolNo), NumVolumes, label, total);
159 for (i = 0; i < NumVolumes; ++i) {
161 format_volume(get_volume(i), NumVolumes, label, total);
163 printf("---------------------------------------------\n");
164 printf("%d volume%s total size %s\n",
165 NumVolumes, (NumVolumes == 1 ? "" : "s"), sizetostr(total));
166 printf("boot-area-size: %s\n", sizetostr(BootAreaSize));
167 printf("memory-log-size: %s\n", sizetostr(MemAreaSize));
168 printf("undo-buffer-size: %s\n", sizetostr(UndoBufferSize));
170 vol = get_volume(RootVolNo);
171 printf("zone-limit: %s\n", sizetostr(vol->ondisk->vol0_zone_limit));
182 fprintf(stderr, "newfs_hammer vol0 [vol1 ...]\n");
187 * Convert the size in bytes to a human readable string.
191 sizetostr(off_t size)
195 if (size < 1024 / 2) {
196 snprintf(buf, sizeof(buf), "%6.2f", (double)size);
197 } else if (size < 1024 * 1024 / 2) {
198 snprintf(buf, sizeof(buf), "%6.2fKB",
199 (double)size / 1024);
200 } else if (size < 1024 * 1024 * 1024LL / 2) {
201 snprintf(buf, sizeof(buf), "%6.2fMB",
202 (double)size / (1024 * 1024));
203 } else if (size < 1024 * 1024 * 1024LL * 1024LL / 2) {
204 snprintf(buf, sizeof(buf), "%6.2fGB",
205 (double)size / (1024 * 1024 * 1024LL));
207 snprintf(buf, sizeof(buf), "%6.2fTB",
208 (double)size / (1024 * 1024 * 1024LL * 1024LL));
214 * Convert a string to a 64 bit signed integer with various requirements.
217 getsize(const char *str, int64_t minval, int64_t maxval, int powerof2)
222 val = strtoll(str, &ptr, 0);
241 errx(1, "Unknown suffix in number '%s'\n", str);
245 errx(1, "Unknown suffix in number '%s'\n", str);
249 errx(1, "Value too small: %s, min is %s\n",
250 str, sizetostr(minval));
254 errx(1, "Value too large: %s, max is %s\n",
255 str, sizetostr(maxval));
258 if ((powerof2 & 1) && (val ^ (val - 1)) != ((val << 1) - 1)) {
259 errx(1, "Value not power of 2: %s\n", str);
262 if ((powerof2 & 2) && (val & HAMMER_BUFMASK)) {
263 errx(1, "Value not an integral multiple of %dK: %s",
264 HAMMER_BUFSIZE / 1024, str);
271 * Generate a transaction id
276 static hammer_tid_t lasttid;
280 gettimeofday(&tv, NULL);
281 lasttid = tv.tv_sec * 1000000000LL +
288 * Check basic volume characteristics. HAMMER filesystems use a minimum
289 * of a 16KB filesystem buffer size.
293 check_volume(struct volume_info *vol)
295 struct partinfo pinfo;
299 * Get basic information about the volume
301 vol->fd = open(vol->name, O_RDWR);
303 err(1, "Unable to open %s R+W", vol->name);
304 if (ioctl(vol->fd, DIOCGPART, &pinfo) < 0) {
306 * Allow the formatting of regular filews as HAMMER volumes
308 if (fstat(vol->fd, &st) < 0)
309 err(1, "Unable to stat %s", vol->name);
310 vol->size = st.st_size;
311 vol->type = "REGFILE";
314 * When formatting a block device as a HAMMER volume the
315 * sector size must be compatible. HAMMER uses 16384 byte
316 * filesystem buffers.
318 if (pinfo.reserved_blocks) {
319 errx(1, "HAMMER cannot be placed in a partition "
320 "which overlaps the disklabel or MBR");
322 if (pinfo.media_blksize > 16384 ||
323 16384 % pinfo.media_blksize) {
324 errx(1, "A media sector size of %d is not supported",
325 pinfo.media_blksize);
328 vol->size = pinfo.media_size;
329 vol->type = "DEVICE";
331 printf("Volume %d %s %-15s size %s\n",
332 vol->vol_no, vol->type, vol->name,
333 sizetostr(vol->size));
336 * Reserve space for (future) header junk, setup our poor-man's
337 * bigblock allocator.
339 vol->vol_alloc = HAMMER_BUFSIZE * 16;
343 * Format a HAMMER volume. Cluster 0 will be initially placed in volume 0.
347 format_volume(struct volume_info *vol, int nvols, const char *label,
350 struct volume_info *root_vol;
351 struct hammer_volume_ondisk *ondisk;
355 * Initialize basic information in the on-disk volume structure.
357 ondisk = vol->ondisk;
359 ondisk->vol_fsid = Hammer_FSId;
360 ondisk->vol_fstype = Hammer_FSType;
361 snprintf(ondisk->vol_name, sizeof(ondisk->vol_name), "%s", label);
362 ondisk->vol_no = vol->vol_no;
363 ondisk->vol_count = nvols;
364 ondisk->vol_version = 1;
366 ondisk->vol_bot_beg = vol->vol_alloc;
367 vol->vol_alloc += BootAreaSize;
368 ondisk->vol_mem_beg = vol->vol_alloc;
369 vol->vol_alloc += MemAreaSize;
372 * The remaining area is the zone 2 buffer allocation area. These
375 ondisk->vol_buf_beg = vol->vol_alloc;
376 ondisk->vol_buf_end = vol->size & ~(int64_t)HAMMER_BUFMASK;
378 if (ondisk->vol_buf_end < ondisk->vol_buf_beg) {
379 errx(1, "volume %d %s is too small to hold the volume header",
380 vol->vol_no, vol->name);
383 ondisk->vol_nblocks = (ondisk->vol_buf_end - ondisk->vol_buf_beg) /
385 ondisk->vol_blocksize = HAMMER_BUFSIZE;
387 ondisk->vol_rootvol = RootVolNo;
388 ondisk->vol_signature = HAMMER_FSBUF_VOLUME;
390 vol->vol_free_off = HAMMER_ENCODE_RAW_BUFFER(vol->vol_no, 0);
391 vol->vol_free_end = HAMMER_ENCODE_RAW_BUFFER(vol->vol_no, (ondisk->vol_buf_end - ondisk->vol_buf_beg) & ~HAMMER_LARGEBLOCK_MASK64);
394 * Format the root volume.
396 if (vol->vol_no == RootVolNo) {
397 hammer_off_t zone_limit;
402 ondisk->vol0_next_tid = createtid();
405 * Set the default zone limit to 100x the size of the
406 * filesystem. We do not want to create a huge zone limit
407 * for tiny filesystems because the blockmap could wind up
408 * getting fragmented and eating a large chunk of the disk
411 zone_limit = (hammer_off_t)total_size * 100;
412 zone_limit = (zone_limit + HAMMER_BLOCKMAP_LAYER2_MASK) &
413 ~HAMMER_BLOCKMAP_LAYER2_MASK;
414 if (zone_limit < (hammer_off_t)total_size ||
415 zone_limit > HAMMER_ZONE_LIMIT) {
416 zone_limit = HAMMER_ZONE_LIMIT;
418 ondisk->vol0_zone_limit = zone_limit;
421 &ondisk->vol0_blockmap[HAMMER_ZONE_FREEMAP_INDEX]);
423 freeblks = initialize_freemap(vol);
424 ondisk->vol0_stat_freebigblocks = freeblks;
425 ondisk->vol0_stat_bigblocks = freeblks;
428 &ondisk->vol0_blockmap[HAMMER_ZONE_BTREE_INDEX],
431 &ondisk->vol0_blockmap[HAMMER_ZONE_RECORD_INDEX],
434 &ondisk->vol0_blockmap[HAMMER_ZONE_LARGE_DATA_INDEX],
435 HAMMER_ZONE_LARGE_DATA);
437 &ondisk->vol0_blockmap[HAMMER_ZONE_SMALL_DATA_INDEX],
438 HAMMER_ZONE_SMALL_DATA);
440 format_undomap(ondisk);
442 ondisk->vol0_btree_root = format_root();
443 ++ondisk->vol0_stat_inodes; /* root inode */
445 freeblks = initialize_freemap(vol);
446 root_vol = get_volume(RootVolNo);
447 root_vol->cache.modified = 1;
448 root_vol->ondisk->vol0_stat_freebigblocks += freeblks;
449 root_vol->ondisk->vol0_stat_bigblocks += freeblks;
450 rel_volume(root_vol);
455 * Format the root directory.
461 hammer_off_t btree_off;
462 hammer_off_t rec_off;
463 hammer_node_ondisk_t bnode;
464 hammer_record_ondisk_t rec;
465 struct hammer_inode_data *idata;
466 hammer_btree_elm_t elm;
468 bnode = alloc_btree_element(&btree_off);
469 rec = alloc_record_element(&rec_off, sizeof(*idata), (void **)&idata);
472 * Populate the inode data and inode record for the root directory.
474 idata->version = HAMMER_INODE_DATA_VERSION;
477 rec->base.base.btype = HAMMER_BTREE_TYPE_RECORD;
478 rec->base.base.obj_id = HAMMER_OBJID_ROOT;
479 rec->base.base.key = 0;
480 rec->base.base.create_tid = createtid();
481 rec->base.base.delete_tid = 0;
482 rec->base.base.rec_type = HAMMER_RECTYPE_INODE;
483 rec->base.base.obj_type = HAMMER_OBJTYPE_DIRECTORY;
484 /* rec->base.data_offset - initialized by alloc_record_element */
485 /* rec->base.data_len - initialized by alloc_record_element */
486 rec->base.data_crc = crc32(idata, sizeof(*idata));
487 rec->inode.ino_atime = rec->base.base.create_tid;
488 rec->inode.ino_mtime = rec->base.base.create_tid;
489 rec->inode.ino_size = 0;
490 rec->inode.ino_nlinks = 1;
491 rec->base.signature = HAMMER_RECORD_SIGNATURE_GOOD;
492 rec->base.rec_crc = crc32(&rec->base.rec_crc + 1,
493 HAMMER_RECORD_SIZE - sizeof(rec->base.rec_crc));
496 * Create the root of the B-Tree. The root is a leaf node so we
497 * do not have to worry about boundary elements.
499 bnode->signature = HAMMER_BTREE_SIGNATURE_GOOD;
501 bnode->type = HAMMER_BTREE_TYPE_LEAF;
503 elm = &bnode->elms[0];
504 elm->base = rec->base.base;
505 elm->leaf.rec_offset = rec_off;
506 elm->leaf.data_offset = rec->base.data_off;
507 elm->leaf.data_len = rec->base.data_len;
508 elm->leaf.data_crc = rec->base.data_crc;
510 bnode->crc = crc32(&bnode->crc + 1,
511 sizeof(*bnode) - sizeof(bnode->crc));