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bcachefs: Fix journal entry repair code

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When we detect bad keys in the journal that have to be dropped, the flow
control was wrong - we ended up not checking the next key in that entry.
Oops.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2020-11-16 12:22:30 -05:00
committed by Kent Overstreet
parent 628a3ad2c2
commit 4d54337cdb
1 changed files with 32 additions and 16 deletions
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48
fs/bcachefs/journal_io.c
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@@ -160,6 +160,8 @@ static void journal_entry_null_range(void *start, void *end)
#define journal_entry_err_on(cond, c, msg, ...) \
((cond) ? journal_entry_err(c, msg, ##__VA_ARGS__) : false)
#define FSCK_DELETED_KEY 5
static int journal_validate_key(struct bch_fs *c, struct jset *jset,
struct jset_entry *entry,
unsigned level, enum btree_id btree_id,
@@ -172,33 +174,42 @@ static int journal_validate_key(struct bch_fs *c, struct jset *jset,
int ret = 0;
if (journal_entry_err_on(!k->k.u64s, c,
"invalid %s in journal entry %llu offset %zi: k->u64s 0",
"invalid %s in jset %llu offset %zi/%u entry offset %zi/%u: k->u64s 0",
type, le64_to_cpu(jset->seq),
(u64 *) entry - jset->_data)) {
(u64 *) entry - jset->_data,
le32_to_cpu(jset->u64s),
(u64 *) k - entry->_data,
le16_to_cpu(entry->u64s))) {
entry->u64s = cpu_to_le16((u64 *) k - entry->_data);
journal_entry_null_range(vstruct_next(entry), next);
return 0;
return FSCK_DELETED_KEY;
}
if (journal_entry_err_on((void *) bkey_next(k) >
(void *) vstruct_next(entry), c,
"invalid %s in journal entry %llu offset %zi: extends past end of journal entry",
"invalid %s in jset %llu offset %zi/%u entry offset %zi/%u: extends past end of journal entry",
type, le64_to_cpu(jset->seq),
(u64 *) entry - jset->_data)) {
(u64 *) entry - jset->_data,
le32_to_cpu(jset->u64s),
(u64 *) k - entry->_data,
le16_to_cpu(entry->u64s))) {
entry->u64s = cpu_to_le16((u64 *) k - entry->_data);
journal_entry_null_range(vstruct_next(entry), next);
return 0;
return FSCK_DELETED_KEY;
}
if (journal_entry_err_on(k->k.format != KEY_FORMAT_CURRENT, c,
"invalid %s in journal entry %llu offset %zi: bad format %u",
"invalid %s in jset %llu offset %zi/%u entry offset %zi/%u: bad format %u",
type, le64_to_cpu(jset->seq),
(u64 *) entry - jset->_data,
le32_to_cpu(jset->u64s),
(u64 *) k - entry->_data,
le16_to_cpu(entry->u64s),
k->k.format)) {
le16_add_cpu(&entry->u64s, -k->k.u64s);
le16_add_cpu(&entry->u64s, -((u16) k->k.u64s));
memmove(k, bkey_next(k), next - (void *) bkey_next(k));
journal_entry_null_range(vstruct_next(entry), next);
return 0;
return FSCK_DELETED_KEY;
}
if (!write)
@@ -212,15 +223,18 @@ static int journal_validate_key(struct bch_fs *c, struct jset *jset,
char buf[160];
bch2_bkey_val_to_text(&PBUF(buf), c, bkey_i_to_s_c(k));
mustfix_fsck_err(c, "invalid %s in journal entry %llu offset %zi: %s\n%s",
mustfix_fsck_err(c, "invalid %s in jset %llu offset %zi/%u entry offset %zi/%u: %s\n%s",
type, le64_to_cpu(jset->seq),
(u64 *) entry - jset->_data,
le32_to_cpu(jset->u64s),
(u64 *) k - entry->_data,
le16_to_cpu(entry->u64s),
invalid, buf);
le16_add_cpu(&entry->u64s, -k->k.u64s);
le16_add_cpu(&entry->u64s, -((u16) k->k.u64s));
memmove(k, bkey_next(k), next - (void *) bkey_next(k));
journal_entry_null_range(vstruct_next(entry), next);
return 0;
return FSCK_DELETED_KEY;
}
if (write)
@@ -236,15 +250,17 @@ static int journal_entry_validate_btree_keys(struct bch_fs *c,
struct jset_entry *entry,
int write)
{
struct bkey_i *k;
struct bkey_i *k = entry->start;
vstruct_for_each(entry, k) {
while (k != vstruct_last(entry)) {
int ret = journal_validate_key(c, jset, entry,
entry->level,
entry->btree_id,
k, "key", write);
if (ret)
return ret;
if (ret == FSCK_DELETED_KEY)
continue;
k = bkey_next(k);
}
return 0;