2 * Copyright (c) 2017-2019 The DragonFly Project
3 * Copyright (c) 2017-2019 Tomohiro Kusumi <tkusumi@netbsd.org>
6 * This software was developed by Edward Tomasz Napierala under sponsorship
7 * from the FreeBSD Foundation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
41 #include <sys/types.h>
43 #include "hammer2_disk.h"
47 static hammer2_volume_data_t*
48 read_voldata(FILE *fp)
50 hammer2_volume_data_t *voldata;
52 voldata = read_buf(fp, 0, sizeof(*voldata));
54 err(1, "failed to read volume data");
60 test_voldata(const hammer2_volume_data_t *voldata)
62 if (voldata->magic != HAMMER2_VOLUME_ID_HBO &&
63 voldata->magic != HAMMER2_VOLUME_ID_ABO)
69 static hammer2_media_data_t*
70 read_media(FILE *fp, const hammer2_blockref_t *bref, size_t *media_bytes)
72 hammer2_media_data_t *media;
73 hammer2_off_t io_off, io_base;
74 size_t bytes, io_bytes, boff;
76 bytes = (bref->data_off & HAMMER2_OFF_MASK_RADIX);
78 bytes = (size_t)1 << bytes;
82 warnx("blockref has no data");
86 io_off = bref->data_off & ~HAMMER2_OFF_MASK_RADIX;
87 io_base = io_off & ~(hammer2_off_t)(HAMMER2_MINIOSIZE - 1);
88 boff = io_off - io_base;
90 io_bytes = HAMMER2_MINIOSIZE;
91 while (io_bytes + boff < bytes)
94 if (io_bytes > sizeof(hammer2_media_data_t)) {
95 warnx("invalid I/O bytes");
99 if (fseek(fp, io_base, SEEK_SET) == -1) {
100 warnx("failed to seek media");
103 media = read_buf(fp, io_base, io_bytes);
105 warnx("failed to read media");
109 memcpy(media, (char *)media + boff, bytes);
115 find_pfs(FILE *fp, const hammer2_blockref_t *bref, const char *pfs, bool *res)
117 hammer2_media_data_t *media;
118 hammer2_inode_data_t ipdata;
119 hammer2_blockref_t *bscan;
123 media = read_media(fp, bref, &bytes);
127 switch (bref->type) {
128 case HAMMER2_BREF_TYPE_INODE:
129 ipdata = media->ipdata;
130 if (ipdata.meta.pfs_type & HAMMER2_PFSTYPE_SUPROOT) {
131 bscan = &ipdata.u.blockset.blockref[0];
132 bcount = HAMMER2_SET_COUNT;
136 if (ipdata.meta.op_flags & HAMMER2_OPFLAG_PFSROOT) {
137 if (memchr(ipdata.filename, 0,
138 sizeof(ipdata.filename))) {
140 (const char*)ipdata.filename, pfs))
143 if (strlen(pfs) > 0 &&
144 !memcmp(ipdata.filename, pfs,
152 case HAMMER2_BREF_TYPE_INDIRECT:
153 bscan = &media->npdata[0];
154 bcount = bytes / sizeof(hammer2_blockref_t);
162 for (i = 0; i < bcount; ++i) {
163 if (bscan[i].type != HAMMER2_BREF_TYPE_EMPTY) {
164 if (find_pfs(fp, &bscan[i], pfs, res) == -1) {
176 extract_device_name(const char *devpath)
190 p = strrchr(head, '/');
206 read_label(FILE *fp, char *label, size_t size)
208 hammer2_blockref_t broot, best, *bref;
209 hammer2_media_data_t *vols[HAMMER2_NUM_VOLHDRS], *media;
212 int i, best_i, error = 1;
217 memset(&best, 0, sizeof(best));
219 for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++) {
220 memset(&broot, 0, sizeof(broot));
221 broot.type = HAMMER2_BREF_TYPE_VOLUME;
222 broot.data_off = (i * HAMMER2_ZONE_BYTES64) | HAMMER2_PBUFRADIX;
223 vols[i] = read_buf(fp, broot.data_off & ~HAMMER2_OFF_MASK_RADIX,
225 broot.mirror_tid = vols[i]->voldata.mirror_tid;
226 if (best_i < 0 || best.mirror_tid < broot.mirror_tid) {
232 bref = &vols[best_i]->voldata.sroot_blockset.blockref[0];
233 if (bref->type != HAMMER2_BREF_TYPE_INODE) {
234 warnx("blockref type is not inode");
238 media = read_media(fp, bref, &bytes);
244 devname = extract_device_name(NULL);
245 assert(!devname); /* Currently always NULL in FreeBSD. */
247 /* Add device name to help support multiple autofs -media mounts. */
248 if (find_pfs(fp, bref, pfs, &res) == 0 && res) {
250 snprintf(label, size, "%s_%s", pfs, devname);
252 strlcpy(label, pfs, size);
254 memset(label, 0, size);
255 memcpy(label, media->ipdata.filename,
256 sizeof(media->ipdata.filename));
258 strlcat(label, "_", size);
259 strlcat(label, devname, size);
267 for (i = 0; i < HAMMER2_NUM_VOLHDRS; i++)
274 fstyp_hammer2(FILE *fp, char *label, size_t size)
276 hammer2_volume_data_t *voldata;
279 voldata = read_voldata(fp);
280 if (test_voldata(voldata))
283 error = read_label(fp, label, size);