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bcachefs: improve validate_bset_keys()

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-01-05 14:17:57 -05:00
parent 5e448c4893
commit 2d02bfb01b
1 changed files with 55 additions and 20 deletions
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75
fs/bcachefs/btree_io.c
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@ -524,7 +524,8 @@ static void btree_err_msg(struct printbuf *out, struct bch_fs *c,
prt_printf(out, "at btree ");
bch2_btree_pos_to_text(out, c, b);
prt_printf(out, "\n node offset %u", b->written);
prt_printf(out, "\n node offset %u/%u",
b->written, btree_ptr_sectors_written(&b->key));
if (i)
prt_printf(out, " bset u64s %u", le16_to_cpu(i->u64s));
prt_str(out, ": ");
@ -830,6 +831,23 @@ static int bset_key_invalid(struct bch_fs *c, struct btree *b,
(rw == WRITE ? bch2_bkey_val_invalid(c, k, READ, err) : 0);
}
static bool __bkey_valid(struct bch_fs *c, struct btree *b,
struct bset *i, struct bkey_packed *k)
{
if (bkey_p_next(k) > vstruct_last(i))
return false;
if (k->format > KEY_FORMAT_CURRENT)
return false;
struct printbuf buf = PRINTBUF;
struct bkey tmp;
struct bkey_s u = __bkey_disassemble(b, k, &tmp);
bool ret = __bch2_bkey_invalid(c, u.s_c, btree_node_type(b), READ, &buf);
printbuf_exit(&buf);
return ret;
}
static int validate_bset_keys(struct bch_fs *c, struct btree *b,
struct bset *i, int write,
bool have_retry, bool *saw_error)
@ -845,6 +863,7 @@ static int validate_bset_keys(struct bch_fs *c, struct btree *b,
k != vstruct_last(i);) {
struct bkey_s u;
struct bkey tmp;
unsigned next_good_key;
if (btree_err_on(bkey_p_next(k) > vstruct_last(i),
-BCH_ERR_btree_node_read_err_fixable,
@ -859,12 +878,8 @@ static int validate_bset_keys(struct bch_fs *c, struct btree *b,
-BCH_ERR_btree_node_read_err_fixable,
c, NULL, b, i,
btree_node_bkey_bad_format,
"invalid bkey format %u", k->format)) {
i->u64s = cpu_to_le16(le16_to_cpu(i->u64s) - k->u64s);
memmove_u64s_down(k, bkey_p_next(k),
(u64 *) vstruct_end(i) - (u64 *) k);
continue;
}
"invalid bkey format %u", k->format))
goto drop_this_key;
/* XXX: validate k->u64s */
if (!write)
@ -885,11 +900,7 @@ static int validate_bset_keys(struct bch_fs *c, struct btree *b,
c, NULL, b, i,
btree_node_bad_bkey,
"invalid bkey: %s", buf.buf);
i->u64s = cpu_to_le16(le16_to_cpu(i->u64s) - k->u64s);
memmove_u64s_down(k, bkey_p_next(k),
(u64 *) vstruct_end(i) - (u64 *) k);
continue;
goto drop_this_key;
}
if (write)
@ -906,21 +917,45 @@ static int validate_bset_keys(struct bch_fs *c, struct btree *b,
prt_printf(&buf, " > ");
bch2_bkey_to_text(&buf, u.k);
bch2_dump_bset(c, b, i, 0);
if (btree_err(-BCH_ERR_btree_node_read_err_fixable,
c, NULL, b, i,
btree_node_bkey_out_of_order,
"%s", buf.buf)) {
i->u64s = cpu_to_le16(le16_to_cpu(i->u64s) - k->u64s);
memmove_u64s_down(k, bkey_p_next(k),
(u64 *) vstruct_end(i) - (u64 *) k);
continue;
}
"%s", buf.buf))
goto drop_this_key;
}
prev = k;
k = bkey_p_next(k);
continue;
drop_this_key:
next_good_key = k->u64s;
if (!next_good_key ||
(BSET_BIG_ENDIAN(i) == CPU_BIG_ENDIAN &&
version >= bcachefs_metadata_version_snapshot)) {
/*
* only do scanning if bch2_bkey_compat() has nothing to
* do
*/
if (!__bkey_valid(c, b, i, (void *) ((u64 *) k + next_good_key))) {
for (next_good_key = 1;
next_good_key < (u64 *) vstruct_last(i) - (u64 *) k;
next_good_key++)
if (__bkey_valid(c, b, i, (void *) ((u64 *) k + next_good_key)))
goto got_good_key;
}
/*
* didn't find a good key, have to truncate the rest of
* the bset
*/
next_good_key = (u64 *) vstruct_last(i) - (u64 *) k;
}
got_good_key:
le16_add_cpu(&i->u64s, -next_good_key);
memmove_u64s_down(k, bkey_p_next(k), (u64 *) vstruct_end(i) - (u64 *) k);
}
fsck_err:
printbuf_exit(&buf);