From a232478f355c112c775c734182363f9e9b1688f8 Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@gmail.com>
Date: Sat, 18 Jun 2022 18:25:19 -0400
Subject: [PATCH] Break up cmd_debug.c into multiple files
In the future, let's have one cmd_foo.c file per subcommand.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
---
cmd_debug.c | 802 ---------------------------------------------
cmd_dump.c | 182 ++++++++++
cmd_list.c | 401 +++++++++++++++++++++++
cmd_list_journal.c | 246 ++++++++++++++
4 files changed, 829 insertions(+), 802 deletions(-)
delete mode 100644 cmd_debug.c
create mode 100644 cmd_dump.c
create mode 100644 cmd_list.c
create mode 100644 cmd_list_journal.c
diff --git a/cmd_debug.c b/cmd_debug.c
deleted file mode 100644
index a7f70ed3..00000000
--- a/cmd_debug.c
+++ /dev/null
@@ -1,802 +0,0 @@
-#include <fcntl.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include "cmds.h"
-#include "libbcachefs.h"
-#include "qcow2.h"
-#include "tools-util.h"
-
-#include "libbcachefs/bcachefs.h"
-#include "libbcachefs/bset.h"
-#include "libbcachefs/btree_cache.h"
-#include "libbcachefs/btree_io.h"
-#include "libbcachefs/btree_iter.h"
-#include "libbcachefs/buckets.h"
-#include "libbcachefs/checksum.h"
-#include "libbcachefs/error.h"
-#include "libbcachefs/journal.h"
-#include "libbcachefs/journal_io.h"
-#include "libbcachefs/journal_seq_blacklist.h"
-#include "libbcachefs/super.h"
-
-static void dump_usage(void)
-{
- puts("bcachefs dump - dump filesystem metadata\n"
- "Usage: bcachefs dump [OPTION]... <devices>\n"
- "\n"
- "Options:\n"
- " -o output Output qcow2 image(s)\n"
- " -f Force; overwrite when needed\n"
- " -j Dump entire journal, not just dirty entries\n"
- " -h Display this help and exit\n"
- "Report bugs to <linux-bcachefs@vger.kernel.org>");
-}
-
-static void dump_one_device(struct bch_fs *c, struct bch_dev *ca, int fd,
- bool entire_journal)
-{
- struct bch_sb *sb = ca->disk_sb.sb;
- ranges data = { 0 };
- unsigned i;
- int ret;
-
- /* Superblock: */
- range_add(&data, BCH_SB_LAYOUT_SECTOR << 9,
- sizeof(struct bch_sb_layout));
-
- for (i = 0; i < sb->layout.nr_superblocks; i++)
- range_add(&data,
- le64_to_cpu(sb->layout.sb_offset[i]) << 9,
- vstruct_bytes(sb));
-
- /* Journal: */
- for (i = 0; i < ca->journal.nr; i++)
- if (entire_journal ||
- ca->journal.bucket_seq[i] >= c->journal.last_seq_ondisk) {
- u64 bucket = ca->journal.buckets[i];
-
- range_add(&data,
- bucket_bytes(ca) * bucket,
- bucket_bytes(ca));
- }
-
- /* Btree: */
- for (i = 0; i < BTREE_ID_NR; i++) {
- const struct bch_extent_ptr *ptr;
- struct bkey_ptrs_c ptrs;
- struct btree_trans trans;
- struct btree_iter iter;
- struct btree *b;
-
- bch2_trans_init(&trans, c, 0, 0);
-
- __for_each_btree_node(&trans, iter, i, POS_MIN, 0, 1, 0, b, ret) {
- struct btree_node_iter iter;
- struct bkey u;
- struct bkey_s_c k;
-
- for_each_btree_node_key_unpack(b, k, &iter, &u) {
- ptrs = bch2_bkey_ptrs_c(k);
-
- bkey_for_each_ptr(ptrs, ptr)
- if (ptr->dev == ca->dev_idx)
- range_add(&data,
- ptr->offset << 9,
- btree_bytes(c));
- }
- }
-
- if (ret)
- die("error %s walking btree nodes", strerror(-ret));
-
- b = c->btree_roots[i].b;
- if (!btree_node_fake(b)) {
- ptrs = bch2_bkey_ptrs_c(bkey_i_to_s_c(&b->key));
-
- bkey_for_each_ptr(ptrs, ptr)
- if (ptr->dev == ca->dev_idx)
- range_add(&data,
- ptr->offset << 9,
- btree_bytes(c));
- }
-
- bch2_trans_iter_exit(&trans, &iter);
- bch2_trans_exit(&trans);
- }
-
- qcow2_write_image(ca->disk_sb.bdev->bd_fd, fd, &data,
- max_t(unsigned, btree_bytes(c) / 8, block_bytes(c)));
- darray_exit(&data);
-}
-
-int cmd_dump(int argc, char *argv[])
-{
- struct bch_opts opts = bch2_opts_empty();
- struct bch_dev *ca;
- char *out = NULL;
- unsigned i, nr_devices = 0;
- bool force = false, entire_journal = false;
- int fd, opt;
-
- opt_set(opts, nochanges, true);
- opt_set(opts, norecovery, true);
- opt_set(opts, degraded, true);
- opt_set(opts, errors, BCH_ON_ERROR_continue);
- opt_set(opts, fix_errors, FSCK_OPT_NO);
-
- while ((opt = getopt(argc, argv, "o:fjvh")) != -1)
- switch (opt) {
- case 'o':
- out = optarg;
- break;
- case 'f':
- force = true;
- break;
- case 'j':
- entire_journal = true;
- break;
- case 'v':
- opt_set(opts, verbose, true);
- break;
- case 'h':
- dump_usage();
- exit(EXIT_SUCCESS);
- }
- args_shift(optind);
-
- if (!out)
- die("Please supply output filename");
-
- if (!argc)
- die("Please supply device(s) to check");
-
- struct bch_fs *c = bch2_fs_open(argv, argc, opts);
- if (IS_ERR(c))
- die("error opening %s: %s", argv[0], strerror(-PTR_ERR(c)));
-
- down_read(&c->gc_lock);
-
- for_each_online_member(ca, c, i)
- nr_devices++;
-
- BUG_ON(!nr_devices);
-
- for_each_online_member(ca, c, i) {
- int flags = O_WRONLY|O_CREAT|O_TRUNC;
-
- if (!force)
- flags |= O_EXCL;
-
- if (!c->devs[i])
- continue;
-
- char *path = nr_devices > 1
- ? mprintf("%s.%u", out, i)
- : strdup(out);
- fd = xopen(path, flags, 0600);
- free(path);
-
- dump_one_device(c, ca, fd, entire_journal);
- close(fd);
- }
-
- up_read(&c->gc_lock);
-
- bch2_fs_stop(c);
- return 0;
-}
-
-static void list_keys(struct bch_fs *c, enum btree_id btree_id,
- struct bpos start, struct bpos end)
-{
- struct btree_trans trans;
- struct btree_iter iter;
- struct bkey_s_c k;
- struct printbuf buf = PRINTBUF;
- int ret;
-
- bch2_trans_init(&trans, c, 0, 0);
-
- for_each_btree_key(&trans, iter, btree_id, start,
- BTREE_ITER_ALL_SNAPSHOTS|
- BTREE_ITER_PREFETCH, k, ret) {
- if (bkey_cmp(k.k->p, end) > 0)
- break;
-
- printbuf_reset(&buf);
- bch2_bkey_val_to_text(&buf, c, k);
- puts(buf.buf);
- }
- bch2_trans_iter_exit(&trans, &iter);
-
- bch2_trans_exit(&trans);
-
- printbuf_exit(&buf);
-}
-
-static void list_btree_formats(struct bch_fs *c, enum btree_id btree_id, unsigned level,
- struct bpos start, struct bpos end)
-{
- struct btree_trans trans;
- struct btree_iter iter;
- struct btree *b;
- struct printbuf buf = PRINTBUF;
- int ret;
-
- bch2_trans_init(&trans, c, 0, 0);
-
- __for_each_btree_node(&trans, iter, btree_id, start, 0, level, 0, b, ret) {
- if (bkey_cmp(b->key.k.p, end) > 0)
- break;
-
- printbuf_reset(&buf);
- bch2_btree_node_to_text(&buf, c, b);
- puts(buf.buf);
- }
- bch2_trans_iter_exit(&trans, &iter);
-
- if (ret)
- die("error %s walking btree nodes", strerror(-ret));
-
- bch2_trans_exit(&trans);
- printbuf_exit(&buf);
-}
-
-static void list_nodes(struct bch_fs *c, enum btree_id btree_id, unsigned level,
- struct bpos start, struct bpos end)
-{
- struct btree_trans trans;
- struct btree_iter iter;
- struct btree *b;
- struct printbuf buf = PRINTBUF;
- int ret;
-
- bch2_trans_init(&trans, c, 0, 0);
-
- __for_each_btree_node(&trans, iter, btree_id, start, 0, level, 0, b, ret) {
- if (bkey_cmp(b->key.k.p, end) > 0)
- break;
-
- printbuf_reset(&buf);
- bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&b->key));
- fputs(buf.buf, stdout);
- putchar('\n');
- }
- bch2_trans_iter_exit(&trans, &iter);
-
- if (ret)
- die("error %s walking btree nodes", strerror(-ret));
-
- bch2_trans_exit(&trans);
- printbuf_exit(&buf);
-}
-
-static void print_node_ondisk(struct bch_fs *c, struct btree *b)
-{
- struct btree_node *n_ondisk;
- struct extent_ptr_decoded pick;
- struct bch_dev *ca;
- struct bio *bio;
- unsigned offset = 0;
-
- if (bch2_bkey_pick_read_device(c, bkey_i_to_s_c(&b->key), NULL, &pick) <= 0) {
- printf("error getting device to read from\n");
- return;
- }
-
- ca = bch_dev_bkey_exists(c, pick.ptr.dev);
- if (!bch2_dev_get_ioref(ca, READ)) {
- printf("error getting device to read from\n");
- return;
- }
-
- n_ondisk = malloc(btree_bytes(c));
-
- bio = bio_alloc_bioset(ca->disk_sb.bdev,
- buf_pages(n_ondisk, btree_bytes(c)),
- REQ_OP_READ|REQ_META,
- GFP_NOIO,
- &c->btree_bio);
- bio->bi_iter.bi_sector = pick.ptr.offset;
- bch2_bio_map(bio, n_ondisk, btree_bytes(c));
-
- submit_bio_wait(bio);
-
- bio_put(bio);
- percpu_ref_put(&ca->io_ref);
-
- while (offset < btree_sectors(c)) {
- struct bset *i;
- struct nonce nonce;
- struct bch_csum csum;
- struct bkey_packed *k;
- unsigned sectors;
-
- if (!offset) {
- i = &n_ondisk->keys;
-
- if (!bch2_checksum_type_valid(c, BSET_CSUM_TYPE(i)))
- die("unknown checksum type");
-
- nonce = btree_nonce(i, offset << 9);
- csum = csum_vstruct(c, BSET_CSUM_TYPE(i), nonce, n_ondisk);
-
- if (bch2_crc_cmp(csum, n_ondisk->csum))
- die("invalid checksum\n");
-
- bset_encrypt(c, i, offset << 9);
-
- sectors = vstruct_sectors(n_ondisk, c->block_bits);
- } else {
- struct btree_node_entry *bne = (void *) n_ondisk + (offset << 9);
-
- i = &bne->keys;
-
- if (i->seq != n_ondisk->keys.seq)
- break;
-
- if (!bch2_checksum_type_valid(c, BSET_CSUM_TYPE(i)))
- die("unknown checksum type");
-
- nonce = btree_nonce(i, offset << 9);
- csum = csum_vstruct(c, BSET_CSUM_TYPE(i), nonce, bne);
-
- if (bch2_crc_cmp(csum, bne->csum))
- die("invalid checksum");
-
- bset_encrypt(c, i, offset << 9);
-
- sectors = vstruct_sectors(bne, c->block_bits);
- }
-
- fprintf(stdout, " offset %u version %u, journal seq %llu\n",
- offset,
- le16_to_cpu(i->version),
- le64_to_cpu(i->journal_seq));
- offset += sectors;
-
- for (k = i->start; k != vstruct_last(i); k = bkey_next(k)) {
- struct bkey u;
- struct printbuf buf = PRINTBUF;
-
- bch2_bkey_val_to_text(&buf, c, bkey_disassemble(b, k, &u));
- fprintf(stdout, " %s\n", buf.buf);
-
- printbuf_exit(&buf);
- }
- }
-
- free(n_ondisk);
-}
-
-static void list_nodes_ondisk(struct bch_fs *c, enum btree_id btree_id, unsigned level,
- struct bpos start, struct bpos end)
-{
- struct btree_trans trans;
- struct btree_iter iter;
- struct btree *b;
- struct printbuf buf = PRINTBUF;
- int ret;
-
- bch2_trans_init(&trans, c, 0, 0);
-
- __for_each_btree_node(&trans, iter, btree_id, start, 0, level, 0, b, ret) {
- if (bkey_cmp(b->key.k.p, end) > 0)
- break;
-
- printbuf_reset(&buf);
- bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&b->key));
- fputs(buf.buf, stdout);
- putchar('\n');
-
- print_node_ondisk(c, b);
- }
- bch2_trans_iter_exit(&trans, &iter);
-
- if (ret)
- die("error %s walking btree nodes", strerror(-ret));
-
- bch2_trans_exit(&trans);
- printbuf_exit(&buf);
-}
-
-static void list_nodes_keys(struct bch_fs *c, enum btree_id btree_id, unsigned level,
- struct bpos start, struct bpos end)
-{
- struct btree_trans trans;
- struct btree_iter iter;
- struct btree_node_iter node_iter;
- struct bkey unpacked;
- struct bkey_s_c k;
- struct btree *b;
- struct printbuf buf = PRINTBUF;
- int ret;
-
- bch2_trans_init(&trans, c, 0, 0);
-
- __for_each_btree_node(&trans, iter, btree_id, start, 0, level, 0, b, ret) {
- if (bkey_cmp(b->key.k.p, end) > 0)
- break;
-
- printbuf_reset(&buf);
- bch2_btree_node_to_text(&buf, c, b);
- fputs(buf.buf, stdout);
-
- for_each_btree_node_key_unpack(b, k, &node_iter, &unpacked) {
- printbuf_reset(&buf);
- bch2_bkey_val_to_text(&buf, c, k);
- putchar('\t');
- puts(buf.buf);
- }
- }
- bch2_trans_iter_exit(&trans, &iter);
-
- if (ret)
- die("error %s walking btree nodes", strerror(-ret));
-
- bch2_trans_exit(&trans);
- printbuf_exit(&buf);
-}
-
-static void list_keys_usage(void)
-{
- puts("bcachefs list - list filesystem metadata to stdout\n"
- "Usage: bcachefs list [OPTION]... <devices>\n"
- "\n"
- "Options:\n"
- " -b (extents|inodes|dirents|xattrs) Btree to list from\n"
- " -l level Btree depth to descend to (0 == leaves)\n"
- " -s inode:offset Start position to list from\n"
- " -e inode:offset End position\n"
- " -i inode List keys for a given inode number\n"
- " -m (keys|formats|nodes|nodes_ondisk|nodes_keys)\n"
- " List mode\n"
- " -f Check (fsck) the filesystem first\n"
- " -v Verbose mode\n"
- " -h Display this help and exit\n"
- "Report bugs to <linux-bcachefs@vger.kernel.org>");
-}
-
-#define LIST_MODES() \
- x(keys) \
- x(formats) \
- x(nodes) \
- x(nodes_ondisk) \
- x(nodes_keys)
-
-enum list_modes {
-#define x(n) LIST_MODE_##n,
- LIST_MODES()
-#undef x
-};
-
-static const char * const list_modes[] = {
-#define x(n) #n,
- LIST_MODES()
-#undef x
- NULL
-};
-
-int cmd_list(int argc, char *argv[])
-{
- struct bch_opts opts = bch2_opts_empty();
- enum btree_id btree_id_start = 0;
- enum btree_id btree_id_end = BTREE_ID_NR;
- enum btree_id btree_id;
- unsigned level = 0;
- struct bpos start = POS_MIN, end = POS_MAX;
- u64 inum = 0;
- int mode = 0, opt;
-
- opt_set(opts, nochanges, true);
- opt_set(opts, norecovery, true);
- opt_set(opts, degraded, true);
- opt_set(opts, errors, BCH_ON_ERROR_continue);
-
- while ((opt = getopt(argc, argv, "b:l:s:e:i:m:fvh")) != -1)
- switch (opt) {
- case 'b':
- btree_id_start = read_string_list_or_die(optarg,
- bch2_btree_ids, "btree id");
- btree_id_end = btree_id_start + 1;
- break;
- case 'l':
- if (kstrtouint(optarg, 10, &level) || level >= BTREE_MAX_DEPTH)
- die("invalid level");
- break;
- case 's':
- start = bpos_parse(optarg);
- break;
- case 'e':
- end = bpos_parse(optarg);
- break;
- case 'i':
- if (kstrtoull(optarg, 10, &inum))
- die("invalid inode %s", optarg);
- start = POS(inum, 0);
- end = POS(inum + 1, 0);
- break;
- case 'm':
- mode = read_string_list_or_die(optarg,
- list_modes, "list mode");
- break;
- case 'f':
- opt_set(opts, fix_errors, FSCK_OPT_YES);
- opt_set(opts, norecovery, false);
- break;
- case 'v':
- opt_set(opts, verbose, true);
- break;
- case 'h':
- list_keys_usage();
- exit(EXIT_SUCCESS);
- }
- args_shift(optind);
-
- if (!argc)
- die("Please supply device(s)");
-
- struct bch_fs *c = bch2_fs_open(argv, argc, opts);
- if (IS_ERR(c))
- die("error opening %s: %s", argv[0], strerror(-PTR_ERR(c)));
-
-
- for (btree_id = btree_id_start;
- btree_id < btree_id_end;
- btree_id++) {
- switch (mode) {
- case LIST_MODE_keys:
- list_keys(c, btree_id, start, end);
- break;
- case LIST_MODE_formats:
- list_btree_formats(c, btree_id, level, start, end);
- break;
- case LIST_MODE_nodes:
- list_nodes(c, btree_id, level, start, end);
- break;
- case LIST_MODE_nodes_ondisk:
- list_nodes_ondisk(c, btree_id, level, start, end);
- break;
- case LIST_MODE_nodes_keys:
- list_nodes_keys(c, btree_id, level, start, end);
- break;
- default:
- die("Invalid mode");
- }
- }
-
- bch2_fs_stop(c);
- return 0;
-}
-
-static void list_journal_usage(void)
-{
- puts("bcachefs list_journal - print contents of journal\n"
- "Usage: bcachefs list_journal [OPTION]... <devices>\n"
- "\n"
- "Options:\n"
- " -a Read entire journal, not just dirty entries\n"
- " -n Number of journal entries to print, starting from the most recent\n"
- " -v Verbose mode\n"
- " -h Display this help and exit\n"
- "Report bugs to <linux-bcachefs@vger.kernel.org>");
-}
-
-static void star_start_of_lines(char *buf)
-{
- char *p = buf;
-
- if (*p == ' ')
- *p = '*';
-
- while ((p = strstr(p, "\n ")))
- p[1] = '*';
-}
-
-int cmd_list_journal(int argc, char *argv[])
-{
- struct bch_opts opts = bch2_opts_empty();
- u32 nr_entries = U32_MAX;
- int opt;
-
- opt_set(opts, nochanges, true);
- opt_set(opts, norecovery, true);
- opt_set(opts, degraded, true);
- opt_set(opts, errors, BCH_ON_ERROR_continue);
- opt_set(opts, fix_errors, FSCK_OPT_YES);
- opt_set(opts, keep_journal, true);
- opt_set(opts, read_journal_only,true);
-
- while ((opt = getopt(argc, argv, "an:vh")) != -1)
- switch (opt) {
- case 'a':
- opt_set(opts, read_entire_journal, true);
- break;
- case 'n':
- nr_entries = kstrtouint(optarg, 10, &nr_entries);
- opt_set(opts, read_entire_journal, true);
- break;
- case 'v':
- opt_set(opts, verbose, true);
- break;
- case 'h':
- list_journal_usage();
- exit(EXIT_SUCCESS);
- }
- args_shift(optind);
-
- if (!argc)
- die("Please supply device(s) to open");
-
- struct bch_fs *c = bch2_fs_open(argv, argc, opts);
- if (IS_ERR(c))
- die("error opening %s: %s", argv[0], strerror(-PTR_ERR(c)));
-
- struct journal_replay *p, **_p;
- struct genradix_iter iter;
- struct jset_entry *entry;
- struct printbuf buf = PRINTBUF;
-
- genradix_for_each(&c->journal_entries, iter, _p) {
- p = *_p;
- if (!p)
- continue;
-
- if (le64_to_cpu(p->j.seq) + nr_entries < atomic64_read(&c->journal.seq))
- continue;
-
- bool blacklisted =
- bch2_journal_seq_is_blacklisted(c,
- le64_to_cpu(p->j.seq), false);
-
- if (blacklisted)
- printf("blacklisted ");
-
- printf("journal entry %llu\n", le64_to_cpu(p->j.seq));
-
- printbuf_reset(&buf);
-
- prt_printf(&buf,
- " version %u\n"
- " last seq %llu\n"
- " flush %u\n"
- " written at ",
- le32_to_cpu(p->j.version),
- le64_to_cpu(p->j.last_seq),
- !JSET_NO_FLUSH(&p->j));
- bch2_journal_ptrs_to_text(&buf, c, p);
-
- if (blacklisted)
- star_start_of_lines(buf.buf);
- printf("%s\n", buf.buf);
-
- vstruct_for_each(&p->j, entry) {
- printbuf_reset(&buf);
-
- /*
- * log entries denote the start of a new transaction
- * commit:
- */
- if (entry->type == BCH_JSET_ENTRY_log && !entry->level)
- prt_newline(&buf);
- printbuf_indent_add(&buf, 4);
- bch2_journal_entry_to_text(&buf, c, entry);
-
- if (blacklisted)
- star_start_of_lines(buf.buf);
- printf("%s\n", buf.buf);
- }
- }
-
- printbuf_exit(&buf);
- bch2_fs_stop(c);
- return 0;
-}
-
-static void kill_btree_node_usage(void)
-{
- puts("bcachefs kill_btree_node - make btree nodes unreadable\n"
- "Usage: bcachefs kill_btree_node [OPTION]... <devices>\n"
- "\n"
- "Options:\n"
- " -b (extents|inodes|dirents|xattrs) Btree to delete from\n"
- " -l level Levle to delete from (0 == leaves)\n"
- " -i index Index of btree node to kill\n"
- " -h Display this help and exit\n"
- "Report bugs to <linux-bcachefs@vger.kernel.org>");
-}
-
-int cmd_kill_btree_node(int argc, char *argv[])
-{
- struct bch_opts opts = bch2_opts_empty();
- enum btree_id btree_id = 0;
- unsigned level = 0;
- u64 node_index = 0;
- int opt;
-
- opt_set(opts, read_only, true);
-
- while ((opt = getopt(argc, argv, "b:l:i:h")) != -1)
- switch (opt) {
- case 'b':
- btree_id = read_string_list_or_die(optarg,
- bch2_btree_ids, "btree id");
- break;
- case 'l':
- if (kstrtouint(optarg, 10, &level) || level >= BTREE_MAX_DEPTH)
- die("invalid level");
- break;
- case 'i':
- if (kstrtoull(optarg, 10, &node_index))
- die("invalid index %s", optarg);
- break;
- case 'h':
- kill_btree_node_usage();
- exit(EXIT_SUCCESS);
- }
- args_shift(optind);
-
- if (!argc)
- die("Please supply device(s)");
-
- struct bch_fs *c = bch2_fs_open(argv, argc, opts);
- if (IS_ERR(c))
- die("error opening %s: %s", argv[0], strerror(-PTR_ERR(c)));
-
- struct btree_trans trans;
- struct btree_iter iter;
- struct btree *b;
- int ret;
- void *zeroes;
-
- ret = posix_memalign(&zeroes, c->opts.block_size, c->opts.block_size);
- if (ret)
- die("error %s from posix_memalign", strerror(ret));
-
- bch2_trans_init(&trans, c, 0, 0);
-
- __for_each_btree_node(&trans, iter, btree_id, POS_MIN, 0, level, 0, b, ret) {
- if (b->c.level != level)
- continue;
-
- if (!node_index) {
- struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(bkey_i_to_s_c(&b->key));
- const struct bch_extent_ptr *ptr;
-
- struct printbuf buf = PRINTBUF;
-
- bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&b->key));
- bch_info(c, "killing btree node %s", buf.buf);
- printbuf_exit(&buf);
-
- bkey_for_each_ptr(ptrs, ptr) {
- struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev);
-
- ret = pwrite(ca->disk_sb.bdev->bd_fd, zeroes,
- c->opts.block_size, ptr->offset << 9);
- if (ret != c->opts.block_size) {
- bch_err(c, "pwrite error: expected %u got %i %s",
- c->opts.block_size, ret, strerror(errno));
- ret = EXIT_FAILURE;
- goto done;
- }
- }
- goto done;
- }
-
- node_index--;
- }
- if (ret)
- bch_err(c, "error %i walking btree nodes", ret);
- else
- bch_err(c, "node at specified index not found");
- ret = EXIT_FAILURE;
-done:
- bch2_trans_iter_exit(&trans, &iter);
- bch2_trans_exit(&trans);
-
- bch2_fs_stop(c);
- return ret;
-}
diff --git a/cmd_dump.c b/cmd_dump.c
new file mode 100644
index 00000000..895e0cd0
--- /dev/null
+++ b/cmd_dump.c
@@ -0,0 +1,182 @@
+#include <fcntl.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "cmds.h"
+#include "libbcachefs.h"
+#include "qcow2.h"
+
+#include "libbcachefs/bcachefs.h"
+#include "libbcachefs/btree_cache.h"
+#include "libbcachefs/btree_iter.h"
+#include "libbcachefs/error.h"
+#include "libbcachefs/extents.h"
+#include "libbcachefs/super.h"
+
+static void dump_usage(void)
+{
+ puts("bcachefs dump - dump filesystem metadata\n"
+ "Usage: bcachefs dump [OPTION]... <devices>\n"
+ "\n"
+ "Options:\n"
+ " -o output Output qcow2 image(s)\n"
+ " -f Force; overwrite when needed\n"
+ " -j Dump entire journal, not just dirty entries\n"
+ " -h Display this help and exit\n"
+ "Report bugs to <linux-bcachefs@vger.kernel.org>");
+}
+
+static void dump_one_device(struct bch_fs *c, struct bch_dev *ca, int fd,
+ bool entire_journal)
+{
+ struct bch_sb *sb = ca->disk_sb.sb;
+ ranges data = { 0 };
+ unsigned i;
+ int ret;
+
+ /* Superblock: */
+ range_add(&data, BCH_SB_LAYOUT_SECTOR << 9,
+ sizeof(struct bch_sb_layout));
+
+ for (i = 0; i < sb->layout.nr_superblocks; i++)
+ range_add(&data,
+ le64_to_cpu(sb->layout.sb_offset[i]) << 9,
+ vstruct_bytes(sb));
+
+ /* Journal: */
+ for (i = 0; i < ca->journal.nr; i++)
+ if (entire_journal ||
+ ca->journal.bucket_seq[i] >= c->journal.last_seq_ondisk) {
+ u64 bucket = ca->journal.buckets[i];
+
+ range_add(&data,
+ bucket_bytes(ca) * bucket,
+ bucket_bytes(ca));
+ }
+
+ /* Btree: */
+ for (i = 0; i < BTREE_ID_NR; i++) {
+ const struct bch_extent_ptr *ptr;
+ struct bkey_ptrs_c ptrs;
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct btree *b;
+
+ bch2_trans_init(&trans, c, 0, 0);
+
+ __for_each_btree_node(&trans, iter, i, POS_MIN, 0, 1, 0, b, ret) {
+ struct btree_node_iter iter;
+ struct bkey u;
+ struct bkey_s_c k;
+
+ for_each_btree_node_key_unpack(b, k, &iter, &u) {
+ ptrs = bch2_bkey_ptrs_c(k);
+
+ bkey_for_each_ptr(ptrs, ptr)
+ if (ptr->dev == ca->dev_idx)
+ range_add(&data,
+ ptr->offset << 9,
+ btree_bytes(c));
+ }
+ }
+
+ if (ret)
+ die("error %s walking btree nodes", strerror(-ret));
+
+ b = c->btree_roots[i].b;
+ if (!btree_node_fake(b)) {
+ ptrs = bch2_bkey_ptrs_c(bkey_i_to_s_c(&b->key));
+
+ bkey_for_each_ptr(ptrs, ptr)
+ if (ptr->dev == ca->dev_idx)
+ range_add(&data,
+ ptr->offset << 9,
+ btree_bytes(c));
+ }
+
+ bch2_trans_iter_exit(&trans, &iter);
+ bch2_trans_exit(&trans);
+ }
+
+ qcow2_write_image(ca->disk_sb.bdev->bd_fd, fd, &data,
+ max_t(unsigned, btree_bytes(c) / 8, block_bytes(c)));
+ darray_exit(&data);
+}
+
+int cmd_dump(int argc, char *argv[])
+{
+ struct bch_opts opts = bch2_opts_empty();
+ struct bch_dev *ca;
+ char *out = NULL;
+ unsigned i, nr_devices = 0;
+ bool force = false, entire_journal = false;
+ int fd, opt;
+
+ opt_set(opts, nochanges, true);
+ opt_set(opts, norecovery, true);
+ opt_set(opts, degraded, true);
+ opt_set(opts, errors, BCH_ON_ERROR_continue);
+ opt_set(opts, fix_errors, FSCK_OPT_NO);
+
+ while ((opt = getopt(argc, argv, "o:fjvh")) != -1)
+ switch (opt) {
+ case 'o':
+ out = optarg;
+ break;
+ case 'f':
+ force = true;
+ break;
+ case 'j':
+ entire_journal = true;
+ break;
+ case 'v':
+ opt_set(opts, verbose, true);
+ break;
+ case 'h':
+ dump_usage();
+ exit(EXIT_SUCCESS);
+ }
+ args_shift(optind);
+
+ if (!out)
+ die("Please supply output filename");
+
+ if (!argc)
+ die("Please supply device(s) to check");
+
+ struct bch_fs *c = bch2_fs_open(argv, argc, opts);
+ if (IS_ERR(c))
+ die("error opening %s: %s", argv[0], strerror(-PTR_ERR(c)));
+
+ down_read(&c->gc_lock);
+
+ for_each_online_member(ca, c, i)
+ nr_devices++;
+
+ BUG_ON(!nr_devices);
+
+ for_each_online_member(ca, c, i) {
+ int flags = O_WRONLY|O_CREAT|O_TRUNC;
+
+ if (!force)
+ flags |= O_EXCL;
+
+ if (!c->devs[i])
+ continue;
+
+ char *path = nr_devices > 1
+ ? mprintf("%s.%u", out, i)
+ : strdup(out);
+ fd = xopen(path, flags, 0600);
+ free(path);
+
+ dump_one_device(c, ca, fd, entire_journal);
+ close(fd);
+ }
+
+ up_read(&c->gc_lock);
+
+ bch2_fs_stop(c);
+ return 0;
+}
diff --git a/cmd_list.c b/cmd_list.c
new file mode 100644
index 00000000..f506e422
--- /dev/null
+++ b/cmd_list.c
@@ -0,0 +1,401 @@
+#include <fcntl.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "cmds.h"
+#include "libbcachefs.h"
+#include "qcow2.h"
+#include "tools-util.h"
+
+#include "libbcachefs/bcachefs.h"
+#include "libbcachefs/btree_cache.h"
+#include "libbcachefs/btree_io.h"
+#include "libbcachefs/btree_iter.h"
+#include "libbcachefs/checksum.h"
+#include "libbcachefs/error.h"
+#include "libbcachefs/extents.h"
+#include "libbcachefs/super.h"
+
+static void list_keys(struct bch_fs *c, enum btree_id btree_id,
+ struct bpos start, struct bpos end)
+{
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct bkey_s_c k;
+ struct printbuf buf = PRINTBUF;
+ int ret;
+
+ bch2_trans_init(&trans, c, 0, 0);
+
+ for_each_btree_key(&trans, iter, btree_id, start,
+ BTREE_ITER_ALL_SNAPSHOTS|
+ BTREE_ITER_PREFETCH, k, ret) {
+ if (bkey_cmp(k.k->p, end) > 0)
+ break;
+
+ printbuf_reset(&buf);
+ bch2_bkey_val_to_text(&buf, c, k);
+ puts(buf.buf);
+ }
+ bch2_trans_iter_exit(&trans, &iter);
+
+ bch2_trans_exit(&trans);
+
+ printbuf_exit(&buf);
+}
+
+static void list_btree_formats(struct bch_fs *c, enum btree_id btree_id, unsigned level,
+ struct bpos start, struct bpos end)
+{
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct btree *b;
+ struct printbuf buf = PRINTBUF;
+ int ret;
+
+ bch2_trans_init(&trans, c, 0, 0);
+
+ __for_each_btree_node(&trans, iter, btree_id, start, 0, level, 0, b, ret) {
+ if (bkey_cmp(b->key.k.p, end) > 0)
+ break;
+
+ printbuf_reset(&buf);
+ bch2_btree_node_to_text(&buf, c, b);
+ puts(buf.buf);
+ }
+ bch2_trans_iter_exit(&trans, &iter);
+
+ if (ret)
+ die("error %s walking btree nodes", strerror(-ret));
+
+ bch2_trans_exit(&trans);
+ printbuf_exit(&buf);
+}
+
+static void list_nodes(struct bch_fs *c, enum btree_id btree_id, unsigned level,
+ struct bpos start, struct bpos end)
+{
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct btree *b;
+ struct printbuf buf = PRINTBUF;
+ int ret;
+
+ bch2_trans_init(&trans, c, 0, 0);
+
+ __for_each_btree_node(&trans, iter, btree_id, start, 0, level, 0, b, ret) {
+ if (bkey_cmp(b->key.k.p, end) > 0)
+ break;
+
+ printbuf_reset(&buf);
+ bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&b->key));
+ fputs(buf.buf, stdout);
+ putchar('\n');
+ }
+ bch2_trans_iter_exit(&trans, &iter);
+
+ if (ret)
+ die("error %s walking btree nodes", strerror(-ret));
+
+ bch2_trans_exit(&trans);
+ printbuf_exit(&buf);
+}
+
+static void print_node_ondisk(struct bch_fs *c, struct btree *b)
+{
+ struct btree_node *n_ondisk;
+ struct extent_ptr_decoded pick;
+ struct bch_dev *ca;
+ struct bio *bio;
+ unsigned offset = 0;
+
+ if (bch2_bkey_pick_read_device(c, bkey_i_to_s_c(&b->key), NULL, &pick) <= 0) {
+ printf("error getting device to read from\n");
+ return;
+ }
+
+ ca = bch_dev_bkey_exists(c, pick.ptr.dev);
+ if (!bch2_dev_get_ioref(ca, READ)) {
+ printf("error getting device to read from\n");
+ return;
+ }
+
+ n_ondisk = malloc(btree_bytes(c));
+
+ bio = bio_alloc_bioset(ca->disk_sb.bdev,
+ buf_pages(n_ondisk, btree_bytes(c)),
+ REQ_OP_READ|REQ_META,
+ GFP_NOIO,
+ &c->btree_bio);
+ bio->bi_iter.bi_sector = pick.ptr.offset;
+ bch2_bio_map(bio, n_ondisk, btree_bytes(c));
+
+ submit_bio_wait(bio);
+
+ bio_put(bio);
+ percpu_ref_put(&ca->io_ref);
+
+ while (offset < btree_sectors(c)) {
+ struct bset *i;
+ struct nonce nonce;
+ struct bch_csum csum;
+ struct bkey_packed *k;
+ unsigned sectors;
+
+ if (!offset) {
+ i = &n_ondisk->keys;
+
+ if (!bch2_checksum_type_valid(c, BSET_CSUM_TYPE(i)))
+ die("unknown checksum type");
+
+ nonce = btree_nonce(i, offset << 9);
+ csum = csum_vstruct(c, BSET_CSUM_TYPE(i), nonce, n_ondisk);
+
+ if (bch2_crc_cmp(csum, n_ondisk->csum))
+ die("invalid checksum\n");
+
+ bset_encrypt(c, i, offset << 9);
+
+ sectors = vstruct_sectors(n_ondisk, c->block_bits);
+ } else {
+ struct btree_node_entry *bne = (void *) n_ondisk + (offset << 9);
+
+ i = &bne->keys;
+
+ if (i->seq != n_ondisk->keys.seq)
+ break;
+
+ if (!bch2_checksum_type_valid(c, BSET_CSUM_TYPE(i)))
+ die("unknown checksum type");
+
+ nonce = btree_nonce(i, offset << 9);
+ csum = csum_vstruct(c, BSET_CSUM_TYPE(i), nonce, bne);
+
+ if (bch2_crc_cmp(csum, bne->csum))
+ die("invalid checksum");
+
+ bset_encrypt(c, i, offset << 9);
+
+ sectors = vstruct_sectors(bne, c->block_bits);
+ }
+
+ fprintf(stdout, " offset %u version %u, journal seq %llu\n",
+ offset,
+ le16_to_cpu(i->version),
+ le64_to_cpu(i->journal_seq));
+ offset += sectors;
+
+ for (k = i->start; k != vstruct_last(i); k = bkey_next(k)) {
+ struct bkey u;
+ struct printbuf buf = PRINTBUF;
+
+ bch2_bkey_val_to_text(&buf, c, bkey_disassemble(b, k, &u));
+ fprintf(stdout, " %s\n", buf.buf);
+
+ printbuf_exit(&buf);
+ }
+ }
+
+ free(n_ondisk);
+}
+
+static void list_nodes_ondisk(struct bch_fs *c, enum btree_id btree_id, unsigned level,
+ struct bpos start, struct bpos end)
+{
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct btree *b;
+ struct printbuf buf = PRINTBUF;
+ int ret;
+
+ bch2_trans_init(&trans, c, 0, 0);
+
+ __for_each_btree_node(&trans, iter, btree_id, start, 0, level, 0, b, ret) {
+ if (bkey_cmp(b->key.k.p, end) > 0)
+ break;
+
+ printbuf_reset(&buf);
+ bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&b->key));
+ fputs(buf.buf, stdout);
+ putchar('\n');
+
+ print_node_ondisk(c, b);
+ }
+ bch2_trans_iter_exit(&trans, &iter);
+
+ if (ret)
+ die("error %s walking btree nodes", strerror(-ret));
+
+ bch2_trans_exit(&trans);
+ printbuf_exit(&buf);
+}
+
+static void list_nodes_keys(struct bch_fs *c, enum btree_id btree_id, unsigned level,
+ struct bpos start, struct bpos end)
+{
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct btree_node_iter node_iter;
+ struct bkey unpacked;
+ struct bkey_s_c k;
+ struct btree *b;
+ struct printbuf buf = PRINTBUF;
+ int ret;
+
+ bch2_trans_init(&trans, c, 0, 0);
+
+ __for_each_btree_node(&trans, iter, btree_id, start, 0, level, 0, b, ret) {
+ if (bkey_cmp(b->key.k.p, end) > 0)
+ break;
+
+ printbuf_reset(&buf);
+ bch2_btree_node_to_text(&buf, c, b);
+ fputs(buf.buf, stdout);
+
+ for_each_btree_node_key_unpack(b, k, &node_iter, &unpacked) {
+ printbuf_reset(&buf);
+ bch2_bkey_val_to_text(&buf, c, k);
+ putchar('\t');
+ puts(buf.buf);
+ }
+ }
+ bch2_trans_iter_exit(&trans, &iter);
+
+ if (ret)
+ die("error %s walking btree nodes", strerror(-ret));
+
+ bch2_trans_exit(&trans);
+ printbuf_exit(&buf);
+}
+
+static void list_keys_usage(void)
+{
+ puts("bcachefs list - list filesystem metadata to stdout\n"
+ "Usage: bcachefs list [OPTION]... <devices>\n"
+ "\n"
+ "Options:\n"
+ " -b (extents|inodes|dirents|xattrs) Btree to list from\n"
+ " -l level Btree depth to descend to (0 == leaves)\n"
+ " -s inode:offset Start position to list from\n"
+ " -e inode:offset End position\n"
+ " -i inode List keys for a given inode number\n"
+ " -m (keys|formats|nodes|nodes_ondisk|nodes_keys)\n"
+ " List mode\n"
+ " -f Check (fsck) the filesystem first\n"
+ " -v Verbose mode\n"
+ " -h Display this help and exit\n"
+ "Report bugs to <linux-bcachefs@vger.kernel.org>");
+}
+
+#define LIST_MODES() \
+ x(keys) \
+ x(formats) \
+ x(nodes) \
+ x(nodes_ondisk) \
+ x(nodes_keys)
+
+enum list_modes {
+#define x(n) LIST_MODE_##n,
+ LIST_MODES()
+#undef x
+};
+
+static const char * const list_modes[] = {
+#define x(n) #n,
+ LIST_MODES()
+#undef x
+ NULL
+};
+
+int cmd_list(int argc, char *argv[])
+{
+ struct bch_opts opts = bch2_opts_empty();
+ enum btree_id btree_id_start = 0;
+ enum btree_id btree_id_end = BTREE_ID_NR;
+ enum btree_id btree_id;
+ unsigned level = 0;
+ struct bpos start = POS_MIN, end = POS_MAX;
+ u64 inum = 0;
+ int mode = 0, opt;
+
+ opt_set(opts, nochanges, true);
+ opt_set(opts, norecovery, true);
+ opt_set(opts, degraded, true);
+ opt_set(opts, errors, BCH_ON_ERROR_continue);
+
+ while ((opt = getopt(argc, argv, "b:l:s:e:i:m:fvh")) != -1)
+ switch (opt) {
+ case 'b':
+ btree_id_start = read_string_list_or_die(optarg,
+ bch2_btree_ids, "btree id");
+ btree_id_end = btree_id_start + 1;
+ break;
+ case 'l':
+ if (kstrtouint(optarg, 10, &level) || level >= BTREE_MAX_DEPTH)
+ die("invalid level");
+ break;
+ case 's':
+ start = bpos_parse(optarg);
+ break;
+ case 'e':
+ end = bpos_parse(optarg);
+ break;
+ case 'i':
+ if (kstrtoull(optarg, 10, &inum))
+ die("invalid inode %s", optarg);
+ start = POS(inum, 0);
+ end = POS(inum + 1, 0);
+ break;
+ case 'm':
+ mode = read_string_list_or_die(optarg,
+ list_modes, "list mode");
+ break;
+ case 'f':
+ opt_set(opts, fix_errors, FSCK_OPT_YES);
+ opt_set(opts, norecovery, false);
+ break;
+ case 'v':
+ opt_set(opts, verbose, true);
+ break;
+ case 'h':
+ list_keys_usage();
+ exit(EXIT_SUCCESS);
+ }
+ args_shift(optind);
+
+ if (!argc)
+ die("Please supply device(s)");
+
+ struct bch_fs *c = bch2_fs_open(argv, argc, opts);
+ if (IS_ERR(c))
+ die("error opening %s: %s", argv[0], strerror(-PTR_ERR(c)));
+
+
+ for (btree_id = btree_id_start;
+ btree_id < btree_id_end;
+ btree_id++) {
+ switch (mode) {
+ case LIST_MODE_keys:
+ list_keys(c, btree_id, start, end);
+ break;
+ case LIST_MODE_formats:
+ list_btree_formats(c, btree_id, level, start, end);
+ break;
+ case LIST_MODE_nodes:
+ list_nodes(c, btree_id, level, start, end);
+ break;
+ case LIST_MODE_nodes_ondisk:
+ list_nodes_ondisk(c, btree_id, level, start, end);
+ break;
+ case LIST_MODE_nodes_keys:
+ list_nodes_keys(c, btree_id, level, start, end);
+ break;
+ default:
+ die("Invalid mode");
+ }
+ }
+
+ bch2_fs_stop(c);
+ return 0;
+}
diff --git a/cmd_list_journal.c b/cmd_list_journal.c
new file mode 100644
index 00000000..869d3341
--- /dev/null
+++ b/cmd_list_journal.c
@@ -0,0 +1,246 @@
+#include <fcntl.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "cmds.h"
+#include "libbcachefs.h"
+#include "qcow2.h"
+#include "tools-util.h"
+
+#include "libbcachefs/bcachefs.h"
+#include "libbcachefs/btree_iter.h"
+#include "libbcachefs/error.h"
+#include "libbcachefs/journal_io.h"
+#include "libbcachefs/journal_seq_blacklist.h"
+#include "libbcachefs/super.h"
+
+static void list_journal_usage(void)
+{
+ puts("bcachefs list_journal - print contents of journal\n"
+ "Usage: bcachefs list_journal [OPTION]... <devices>\n"
+ "\n"
+ "Options:\n"
+ " -a Read entire journal, not just dirty entries\n"
+ " -n Number of journal entries to print, starting from the most recent\n"
+ " -v Verbose mode\n"
+ " -h Display this help and exit\n"
+ "Report bugs to <linux-bcachefs@vger.kernel.org>");
+}
+
+static void star_start_of_lines(char *buf)
+{
+ char *p = buf;
+
+ if (*p == ' ')
+ *p = '*';
+
+ while ((p = strstr(p, "\n ")))
+ p[1] = '*';
+}
+
+int cmd_list_journal(int argc, char *argv[])
+{
+ struct bch_opts opts = bch2_opts_empty();
+ u32 nr_entries = U32_MAX;
+ int opt;
+
+ opt_set(opts, nochanges, true);
+ opt_set(opts, norecovery, true);
+ opt_set(opts, degraded, true);
+ opt_set(opts, errors, BCH_ON_ERROR_continue);
+ opt_set(opts, fix_errors, FSCK_OPT_YES);
+ opt_set(opts, keep_journal, true);
+ opt_set(opts, read_journal_only,true);
+
+ while ((opt = getopt(argc, argv, "an:vh")) != -1)
+ switch (opt) {
+ case 'a':
+ opt_set(opts, read_entire_journal, true);
+ break;
+ case 'n':
+ nr_entries = kstrtouint(optarg, 10, &nr_entries);
+ opt_set(opts, read_entire_journal, true);
+ break;
+ case 'v':
+ opt_set(opts, verbose, true);
+ break;
+ case 'h':
+ list_journal_usage();
+ exit(EXIT_SUCCESS);
+ }
+ args_shift(optind);
+
+ if (!argc)
+ die("Please supply device(s) to open");
+
+ struct bch_fs *c = bch2_fs_open(argv, argc, opts);
+ if (IS_ERR(c))
+ die("error opening %s: %s", argv[0], strerror(-PTR_ERR(c)));
+
+ struct journal_replay *p, **_p;
+ struct genradix_iter iter;
+ struct jset_entry *entry;
+ struct printbuf buf = PRINTBUF;
+
+ genradix_for_each(&c->journal_entries, iter, _p) {
+ p = *_p;
+ if (!p)
+ continue;
+
+ if (le64_to_cpu(p->j.seq) + nr_entries < atomic64_read(&c->journal.seq))
+ continue;
+
+ bool blacklisted =
+ bch2_journal_seq_is_blacklisted(c,
+ le64_to_cpu(p->j.seq), false);
+
+ if (blacklisted)
+ printf("blacklisted ");
+
+ printf("journal entry %llu\n", le64_to_cpu(p->j.seq));
+
+ printbuf_reset(&buf);
+
+ prt_printf(&buf,
+ " version %u\n"
+ " last seq %llu\n"
+ " flush %u\n"
+ " written at ",
+ le32_to_cpu(p->j.version),
+ le64_to_cpu(p->j.last_seq),
+ !JSET_NO_FLUSH(&p->j));
+ bch2_journal_ptrs_to_text(&buf, c, p);
+
+ if (blacklisted)
+ star_start_of_lines(buf.buf);
+ printf("%s\n", buf.buf);
+
+ vstruct_for_each(&p->j, entry) {
+ printbuf_reset(&buf);
+
+ /*
+ * log entries denote the start of a new transaction
+ * commit:
+ */
+ if (entry->type == BCH_JSET_ENTRY_log && !entry->level)
+ prt_newline(&buf);
+ printbuf_indent_add(&buf, 4);
+ bch2_journal_entry_to_text(&buf, c, entry);
+
+ if (blacklisted)
+ star_start_of_lines(buf.buf);
+ printf("%s\n", buf.buf);
+ }
+ }
+
+ printbuf_exit(&buf);
+ bch2_fs_stop(c);
+ return 0;
+}
+
+static void kill_btree_node_usage(void)
+{
+ puts("bcachefs kill_btree_node - make btree nodes unreadable\n"
+ "Usage: bcachefs kill_btree_node [OPTION]... <devices>\n"
+ "\n"
+ "Options:\n"
+ " -b (extents|inodes|dirents|xattrs) Btree to delete from\n"
+ " -l level Levle to delete from (0 == leaves)\n"
+ " -i index Index of btree node to kill\n"
+ " -h Display this help and exit\n"
+ "Report bugs to <linux-bcachefs@vger.kernel.org>");
+}
+
+int cmd_kill_btree_node(int argc, char *argv[])
+{
+ struct bch_opts opts = bch2_opts_empty();
+ enum btree_id btree_id = 0;
+ unsigned level = 0;
+ u64 node_index = 0;
+ int opt;
+
+ opt_set(opts, read_only, true);
+
+ while ((opt = getopt(argc, argv, "b:l:i:h")) != -1)
+ switch (opt) {
+ case 'b':
+ btree_id = read_string_list_or_die(optarg,
+ bch2_btree_ids, "btree id");
+ break;
+ case 'l':
+ if (kstrtouint(optarg, 10, &level) || level >= BTREE_MAX_DEPTH)
+ die("invalid level");
+ break;
+ case 'i':
+ if (kstrtoull(optarg, 10, &node_index))
+ die("invalid index %s", optarg);
+ break;
+ case 'h':
+ kill_btree_node_usage();
+ exit(EXIT_SUCCESS);
+ }
+ args_shift(optind);
+
+ if (!argc)
+ die("Please supply device(s)");
+
+ struct bch_fs *c = bch2_fs_open(argv, argc, opts);
+ if (IS_ERR(c))
+ die("error opening %s: %s", argv[0], strerror(-PTR_ERR(c)));
+
+ struct btree_trans trans;
+ struct btree_iter iter;
+ struct btree *b;
+ int ret;
+ void *zeroes;
+
+ ret = posix_memalign(&zeroes, c->opts.block_size, c->opts.block_size);
+ if (ret)
+ die("error %s from posix_memalign", strerror(ret));
+
+ bch2_trans_init(&trans, c, 0, 0);
+
+ __for_each_btree_node(&trans, iter, btree_id, POS_MIN, 0, level, 0, b, ret) {
+ if (b->c.level != level)
+ continue;
+
+ if (!node_index) {
+ struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(bkey_i_to_s_c(&b->key));
+ const struct bch_extent_ptr *ptr;
+
+ struct printbuf buf = PRINTBUF;
+
+ bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&b->key));
+ bch_info(c, "killing btree node %s", buf.buf);
+ printbuf_exit(&buf);
+
+ bkey_for_each_ptr(ptrs, ptr) {
+ struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev);
+
+ ret = pwrite(ca->disk_sb.bdev->bd_fd, zeroes,
+ c->opts.block_size, ptr->offset << 9);
+ if (ret != c->opts.block_size) {
+ bch_err(c, "pwrite error: expected %u got %i %s",
+ c->opts.block_size, ret, strerror(errno));
+ ret = EXIT_FAILURE;
+ goto done;
+ }
+ }
+ goto done;
+ }
+
+ node_index--;
+ }
+ if (ret)
+ bch_err(c, "error %i walking btree nodes", ret);
+ else
+ bch_err(c, "node at specified index not found");
+ ret = EXIT_FAILURE;
+done:
+ bch2_trans_iter_exit(&trans, &iter);
+ bch2_trans_exit(&trans);
+
+ bch2_fs_stop(c);
+ return ret;
+}