7 #include "libbcachefs.h"
10 #include "libbcachefs/bcachefs.h"
11 #include "libbcachefs/btree_cache.h"
12 #include "libbcachefs/btree_iter.h"
13 #include "libbcachefs/error.h"
14 #include "libbcachefs/extents.h"
15 #include "libbcachefs/super.h"
17 static void dump_usage(void)
19 puts("bcachefs dump - dump filesystem metadata\n"
20 "Usage: bcachefs dump [OPTION]... <devices>\n"
23 " -o output Output qcow2 image(s)\n"
24 " -f Force; overwrite when needed\n"
25 " -j Dump entire journal, not just dirty entries\n"
26 " -h Display this help and exit\n"
27 "Report bugs to <linux-bcachefs@vger.kernel.org>");
30 static void dump_one_device(struct bch_fs *c, struct bch_dev *ca, int fd,
33 struct bch_sb *sb = ca->disk_sb.sb;
39 range_add(&data, BCH_SB_LAYOUT_SECTOR << 9,
40 sizeof(struct bch_sb_layout));
42 for (i = 0; i < sb->layout.nr_superblocks; i++)
44 le64_to_cpu(sb->layout.sb_offset[i]) << 9,
48 for (i = 0; i < ca->journal.nr; i++)
50 ca->journal.bucket_seq[i] >= c->journal.last_seq_ondisk) {
51 u64 bucket = ca->journal.buckets[i];
54 bucket_bytes(ca) * bucket,
59 for (i = 0; i < BTREE_ID_NR; i++) {
60 const struct bch_extent_ptr *ptr;
61 struct bkey_ptrs_c ptrs;
62 struct btree_trans trans;
63 struct btree_iter iter;
66 bch2_trans_init(&trans, c, 0, 0);
68 __for_each_btree_node(&trans, iter, i, POS_MIN, 0, 1, 0, b, ret) {
69 struct btree_node_iter iter;
73 for_each_btree_node_key_unpack(b, k, &iter, &u) {
74 ptrs = bch2_bkey_ptrs_c(k);
76 bkey_for_each_ptr(ptrs, ptr)
77 if (ptr->dev == ca->dev_idx)
85 die("error %s walking btree nodes", bch2_err_str(ret));
87 b = c->btree_roots[i].b;
88 if (!btree_node_fake(b)) {
89 ptrs = bch2_bkey_ptrs_c(bkey_i_to_s_c(&b->key));
91 bkey_for_each_ptr(ptrs, ptr)
92 if (ptr->dev == ca->dev_idx)
98 bch2_trans_iter_exit(&trans, &iter);
99 bch2_trans_exit(&trans);
102 qcow2_write_image(ca->disk_sb.bdev->bd_buffered_fd, fd, &data,
103 max_t(unsigned, btree_bytes(c) / 8, block_bytes(c)));
107 int cmd_dump(int argc, char *argv[])
109 struct bch_opts opts = bch2_opts_empty();
112 unsigned i, nr_devices = 0;
113 bool force = false, entire_journal = false;
116 opt_set(opts, nochanges, true);
117 opt_set(opts, norecovery, true);
118 opt_set(opts, degraded, true);
119 opt_set(opts, errors, BCH_ON_ERROR_continue);
120 opt_set(opts, fix_errors, FSCK_OPT_NO);
122 while ((opt = getopt(argc, argv, "o:fjvh")) != -1)
131 entire_journal = true;
134 opt_set(opts, verbose, true);
143 die("Please supply output filename");
146 die("Please supply device(s) to check");
148 struct bch_fs *c = bch2_fs_open(argv, argc, opts);
150 die("error opening %s: %s", argv[0], bch2_err_str(PTR_ERR(c)));
152 down_read(&c->gc_lock);
154 for_each_online_member(ca, c, i)
159 for_each_online_member(ca, c, i) {
160 int flags = O_WRONLY|O_CREAT|O_TRUNC;
168 char *path = nr_devices > 1
169 ? mprintf("%s.%u.qcow2", out, i)
170 : mprintf("%s.qcow2", out);
171 fd = xopen(path, flags, 0600);
174 dump_one_device(c, ca, fd, entire_journal);
178 up_read(&c->gc_lock);