mirror of
https://github.com/torvalds/linux.git
synced 2024-11-26 14:12:06 +00:00
bcachefs: Improvements to the journal read error paths
- Print out more information in error messages - On checksum error, keep the journal entry but mark it bad so that we can prefer entries from other devices that don't have bad checksums 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
Kent Overstreet
parent
a672fb8f5d
commit
ca73852a13
@ -28,9 +28,11 @@ struct journal_list {
|
||||
* be replayed:
|
||||
*/
|
||||
static int journal_entry_add(struct bch_fs *c, struct bch_dev *ca,
|
||||
struct journal_list *jlist, struct jset *j)
|
||||
struct journal_list *jlist, struct jset *j,
|
||||
bool bad)
|
||||
{
|
||||
struct journal_replay *i, *pos;
|
||||
struct bch_devs_list devs = { .nr = 0 };
|
||||
struct list_head *where;
|
||||
size_t bytes = vstruct_bytes(j);
|
||||
__le64 last_seq;
|
||||
@ -59,15 +61,6 @@ static int journal_entry_add(struct bch_fs *c, struct bch_dev *ca,
|
||||
}
|
||||
|
||||
list_for_each_entry_reverse(i, jlist->head, list) {
|
||||
/* Duplicate? */
|
||||
if (le64_to_cpu(j->seq) == le64_to_cpu(i->j.seq)) {
|
||||
fsck_err_on(bytes != vstruct_bytes(&i->j) ||
|
||||
memcmp(j, &i->j, bytes), c,
|
||||
"found duplicate but non identical journal entries (seq %llu)",
|
||||
le64_to_cpu(j->seq));
|
||||
goto found;
|
||||
}
|
||||
|
||||
if (le64_to_cpu(j->seq) > le64_to_cpu(i->j.seq)) {
|
||||
where = &i->list;
|
||||
goto add;
|
||||
@ -76,6 +69,32 @@ static int journal_entry_add(struct bch_fs *c, struct bch_dev *ca,
|
||||
|
||||
where = jlist->head;
|
||||
add:
|
||||
i = where->next != jlist->head
|
||||
? container_of(where->next, struct journal_replay, list)
|
||||
: NULL;
|
||||
|
||||
/*
|
||||
* Duplicate journal entries? If so we want the one that didn't have a
|
||||
* checksum error:
|
||||
*/
|
||||
if (i && le64_to_cpu(j->seq) == le64_to_cpu(i->j.seq)) {
|
||||
if (i->bad) {
|
||||
devs = i->devs;
|
||||
list_del(&i->list);
|
||||
kvpfree(i, offsetof(struct journal_replay, j) +
|
||||
vstruct_bytes(&i->j));
|
||||
} else if (bad) {
|
||||
goto found;
|
||||
} else {
|
||||
fsck_err_on(bytes != vstruct_bytes(&i->j) ||
|
||||
memcmp(j, &i->j, bytes), c,
|
||||
"found duplicate but non identical journal entries (seq %llu)",
|
||||
le64_to_cpu(j->seq));
|
||||
goto found;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
i = kvpmalloc(offsetof(struct journal_replay, j) + bytes, GFP_KERNEL);
|
||||
if (!i) {
|
||||
ret = -ENOMEM;
|
||||
@ -83,7 +102,8 @@ add:
|
||||
}
|
||||
|
||||
list_add(&i->list, where);
|
||||
i->devs.nr = 0;
|
||||
i->devs = devs;
|
||||
i->bad = bad;
|
||||
unsafe_memcpy(&i->j, j, bytes, "embedded variable length struct");
|
||||
found:
|
||||
if (!bch2_dev_list_has_dev(i->devs, ca->dev_idx))
|
||||
@ -390,6 +410,7 @@ fsck_err:
|
||||
}
|
||||
|
||||
static int jset_validate(struct bch_fs *c,
|
||||
struct bch_dev *ca,
|
||||
struct jset *jset, u64 sector,
|
||||
unsigned bucket_sectors_left,
|
||||
unsigned sectors_read,
|
||||
@ -404,16 +425,19 @@ static int jset_validate(struct bch_fs *c,
|
||||
return JOURNAL_ENTRY_NONE;
|
||||
|
||||
version = le32_to_cpu(jset->version);
|
||||
if ((version != BCH_JSET_VERSION_OLD &&
|
||||
version < bcachefs_metadata_version_min) ||
|
||||
version >= bcachefs_metadata_version_max) {
|
||||
bch_err(c, "unknown journal entry version %u", jset->version);
|
||||
return BCH_FSCK_UNKNOWN_VERSION;
|
||||
if (journal_entry_err_on((version != BCH_JSET_VERSION_OLD &&
|
||||
version < bcachefs_metadata_version_min) ||
|
||||
version >= bcachefs_metadata_version_max, c,
|
||||
"%s sector %llu seq %llu: unknown journal entry version %u",
|
||||
ca->name, sector, le64_to_cpu(jset->seq),
|
||||
version)) {
|
||||
/* XXX: note we might have missing journal entries */
|
||||
return JOURNAL_ENTRY_BAD;
|
||||
}
|
||||
|
||||
if (journal_entry_err_on(bytes > bucket_sectors_left << 9, c,
|
||||
"journal entry too big (%zu bytes), sector %lluu",
|
||||
bytes, sector)) {
|
||||
"%s sector %llu seq %llu: journal entry too big (%zu bytes)",
|
||||
ca->name, sector, le64_to_cpu(jset->seq), bytes)) {
|
||||
/* XXX: note we might have missing journal entries */
|
||||
return JOURNAL_ENTRY_BAD;
|
||||
}
|
||||
@ -422,13 +446,15 @@ static int jset_validate(struct bch_fs *c,
|
||||
return JOURNAL_ENTRY_REREAD;
|
||||
|
||||
if (fsck_err_on(!bch2_checksum_type_valid(c, JSET_CSUM_TYPE(jset)), c,
|
||||
"journal entry with unknown csum type %llu sector %lluu",
|
||||
JSET_CSUM_TYPE(jset), sector))
|
||||
"%s sector %llu seq %llu: journal entry with unknown csum type %llu",
|
||||
ca->name, sector, le64_to_cpu(jset->seq),
|
||||
JSET_CSUM_TYPE(jset)))
|
||||
return JOURNAL_ENTRY_BAD;
|
||||
|
||||
csum = csum_vstruct(c, JSET_CSUM_TYPE(jset), journal_nonce(jset), jset);
|
||||
if (journal_entry_err_on(bch2_crc_cmp(csum, jset->csum), c,
|
||||
"journal checksum bad, sector %llu", sector)) {
|
||||
"%s sector %llu seq %llu: journal checksum bad",
|
||||
ca->name, sector, le64_to_cpu(jset->seq))) {
|
||||
/* XXX: retry IO, when we start retrying checksum errors */
|
||||
/* XXX: note we might have missing journal entries */
|
||||
return JOURNAL_ENTRY_BAD;
|
||||
@ -439,8 +465,10 @@ static int jset_validate(struct bch_fs *c,
|
||||
vstruct_end(jset) - (void *) jset->encrypted_start);
|
||||
|
||||
if (journal_entry_err_on(le64_to_cpu(jset->last_seq) > le64_to_cpu(jset->seq), c,
|
||||
"invalid journal entry: last_seq > seq"))
|
||||
"invalid journal entry: last_seq > seq")) {
|
||||
jset->last_seq = jset->seq;
|
||||
return JOURNAL_ENTRY_BAD;
|
||||
}
|
||||
|
||||
return 0;
|
||||
fsck_err:
|
||||
@ -515,11 +543,12 @@ reread:
|
||||
j = buf->data;
|
||||
}
|
||||
|
||||
ret = jset_validate(c, j, offset,
|
||||
ret = jset_validate(c, ca, j, offset,
|
||||
end - offset, sectors_read,
|
||||
READ);
|
||||
switch (ret) {
|
||||
case BCH_FSCK_OK:
|
||||
sectors = vstruct_sectors(j, c->block_bits);
|
||||
break;
|
||||
case JOURNAL_ENTRY_REREAD:
|
||||
if (vstruct_bytes(j) > buf->size) {
|
||||
@ -536,8 +565,13 @@ reread:
|
||||
goto next_block;
|
||||
case JOURNAL_ENTRY_BAD:
|
||||
saw_bad = true;
|
||||
/*
|
||||
* On checksum error we don't really trust the size
|
||||
* field of the journal entry we read, so try reading
|
||||
* again at next block boundary:
|
||||
*/
|
||||
sectors = c->opts.block_size;
|
||||
goto next_block;
|
||||
break;
|
||||
default:
|
||||
return ret;
|
||||
}
|
||||
@ -554,7 +588,7 @@ reread:
|
||||
ja->bucket_seq[bucket] = le64_to_cpu(j->seq);
|
||||
|
||||
mutex_lock(&jlist->lock);
|
||||
ret = journal_entry_add(c, ca, jlist, j);
|
||||
ret = journal_entry_add(c, ca, jlist, j, ret != 0);
|
||||
mutex_unlock(&jlist->lock);
|
||||
|
||||
switch (ret) {
|
||||
@ -565,8 +599,6 @@ reread:
|
||||
default:
|
||||
return ret;
|
||||
}
|
||||
|
||||
sectors = vstruct_sectors(j, c->block_bits);
|
||||
next_block:
|
||||
pr_debug("next");
|
||||
offset += sectors;
|
||||
|
||||
@ -9,6 +9,8 @@
|
||||
struct journal_replay {
|
||||
struct list_head list;
|
||||
struct bch_devs_list devs;
|
||||
/* checksum error, but we may want to try using it anyways: */
|
||||
bool bad;
|
||||
/* must be last: */
|
||||
struct jset j;
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user