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kill_btree_node: We can now kill nodes on a specific device

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For improved btree node scan tests.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2025-07-03 21:12:00 -04:00
parent 78b1ccf5f1
commit 7d69a303d1
1 changed files with 18 additions and 11 deletions
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29
c_src/cmd_kill_btree_node.c
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@ -20,9 +20,8 @@ static void kill_btree_node_usage(void)
"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"
" -n btree:level:idx Node to kill\n"
" -d dev Device index (default: kill all replicas)\n"
" -h Display this help and exit\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
}
@ -37,11 +36,11 @@ int cmd_kill_btree_node(int argc, char *argv[])
{
struct bch_opts opts = bch2_opts_empty();
DARRAY(struct kill_node) kill_nodes = {};
int opt;
int opt, dev_idx = -1;
opt_set(opts, read_only, true);
while ((opt = getopt(argc, argv, "n:h")) != -1)
while ((opt = getopt(argc, argv, "n:d:h")) != -1)
switch (opt) {
case 'n': {
char *p = optarg;
@ -65,6 +64,10 @@ int cmd_kill_btree_node(int argc, char *argv[])
darray_push(&kill_nodes, n);
break;
}
case 'd':
if (kstrtoint(optarg, 10, &dev_idx))
die("invalid device index %s", optarg);
break;
case 'h':
kill_btree_node_usage();
exit(EXIT_SUCCESS);
@ -96,20 +99,24 @@ int cmd_kill_btree_node(int argc, char *argv[])
int ret2 = 0;
if (!i->idx) {
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 l=%u %s",
bch2_btree_id_str(i->btree), i->level, buf.buf);
printbuf_exit(&buf);
ret2 = 1;
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(bkey_i_to_s_c(&b->key));
bkey_for_each_ptr(ptrs, ptr) {
if (dev_idx >= 0 && ptr->dev != dev_idx)
continue;
struct bch_dev *ca = bch2_dev_tryget(c, ptr->dev);
if (!ca)
continue;
struct printbuf buf = PRINTBUF;
bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&b->key));
bch_info(c, "killing btree node on dev %i %s l=%u\n %s",
ptr->dev,
bch2_btree_id_str(i->btree), i->level, buf.buf);
printbuf_exit(&buf);
int ret3 = pwrite(ca->disk_sb.bdev->bd_fd, zeroes,
c->opts.block_size, ptr->offset << 9);
bch2_dev_put(ca);