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btrfs: improve leaf dump and error handling 

Improve the leaf dump behavior by:

- Always dump the leaf first, then the error message

- Output the slot number if possible
  Especially in __btrfs_free_extent() the leaf dump of extent tree can
  be pretty large.
  With an extra slot number it's much easier to locate the problem.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2023-04-27 20:16:28 +08:00 committed by David Sterba
parent 6c75a589cb
commit eee3b81178
2 changed files with 59 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/btrfs/ctree.c
View File

@ -2633,6 +2633,7 @@ void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
if (slot > 0) {
btrfs_item_key(eb, &disk_key, slot - 1);
if (unlikely(comp_keys(&disk_key, new_key) >= 0)) {
btrfs_print_leaf(eb);
btrfs_crit(fs_info,
"slot %u key (%llu %u %llu) new key (%llu %u %llu)",
slot, btrfs_disk_key_objectid(&disk_key),
@ -2640,13 +2641,13 @@ void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
btrfs_disk_key_offset(&disk_key),
new_key->objectid, new_key->type,
new_key->offset);
btrfs_print_leaf(eb);
BUG();
}
}
if (slot < btrfs_header_nritems(eb) - 1) {
btrfs_item_key(eb, &disk_key, slot + 1);
if (unlikely(comp_keys(&disk_key, new_key) <= 0)) {
btrfs_print_leaf(eb);
btrfs_crit(fs_info,
"slot %u key (%llu %u %llu) new key (%llu %u %llu)",
slot, btrfs_disk_key_objectid(&disk_key),
@ -2654,7 +2655,6 @@ void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
btrfs_disk_key_offset(&disk_key),
new_key->objectid, new_key->type,
new_key->offset);
btrfs_print_leaf(eb);
BUG();
}
}

123
fs/btrfs/extent-tree.c
View File

@ -1164,15 +1164,10 @@ int insert_inline_extent_backref(struct btrfs_trans_handle *trans,
* should not happen at all.
*/
if (owner < BTRFS_FIRST_FREE_OBJECTID) {
btrfs_print_leaf(path->nodes[0]);
btrfs_crit(trans->fs_info,
"adding refs to an existing tree ref, bytenr %llu num_bytes %llu root_objectid %llu",
bytenr, num_bytes, root_objectid);
if (IS_ENABLED(CONFIG_BTRFS_DEBUG)) {
WARN_ON(1);
btrfs_crit(trans->fs_info,
"path->slots[0]=%d path->nodes[0]:", path->slots[0]);
btrfs_print_leaf(path->nodes[0]);
}
"adding refs to an existing tree ref, bytenr %llu num_bytes %llu root_objectid %llu slot %u",
bytenr, num_bytes, root_objectid, path->slots[0]);
return -EUCLEAN;
}
update_inline_extent_backref(path, iref, refs_to_add, extent_op);
@ -2838,6 +2833,13 @@ static int do_free_extent_accounting(struct btrfs_trans_handle *trans,
return ret;
}
#define abort_and_dump(trans, path, fmt, args...) \
({ \
btrfs_abort_transaction(trans, -EUCLEAN); \
btrfs_print_leaf(path->nodes[0]); \
btrfs_crit(trans->fs_info, fmt, ##args); \
})
/*
* Drop one or more refs of @node.
*
@ -2978,10 +2980,11 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
if (!found_extent) {
if (iref) {
btrfs_crit(info,
"invalid iref, no EXTENT/METADATA_ITEM found but has inline extent ref");
btrfs_abort_transaction(trans, -EUCLEAN);
goto err_dump;
abort_and_dump(trans, path,
"invalid iref slot %u, no EXTENT/METADATA_ITEM found but has inline extent ref",
path->slots[0]);
ret = -EUCLEAN;
goto out;
}
/* Must be SHARED_* item, remove the backref first */
ret = remove_extent_backref(trans, extent_root, path,
@ -3029,11 +3032,11 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
}
if (ret) {
btrfs_err(info,
"umm, got %d back from search, was looking for %llu",
ret, bytenr);
if (ret > 0)
btrfs_print_leaf(path->nodes[0]);
btrfs_err(info,
"umm, got %d back from search, was looking for %llu, slot %d",
ret, bytenr, path->slots[0]);
}
if (ret < 0) {
btrfs_abort_transaction(trans, ret);
@ -3042,12 +3045,10 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
extent_slot = path->slots[0];
}
} else if (WARN_ON(ret == -ENOENT)) {
btrfs_print_leaf(path->nodes[0]);
btrfs_err(info,
"unable to find ref byte nr %llu parent %llu root %llu owner %llu offset %llu",
bytenr, parent, root_objectid, owner_objectid,
owner_offset);
btrfs_abort_transaction(trans, ret);
abort_and_dump(trans, path,
"unable to find ref byte nr %llu parent %llu root %llu owner %llu offset %llu slot %d",
bytenr, parent, root_objectid, owner_objectid,
owner_offset, path->slots[0]);
goto out;
} else {
btrfs_abort_transaction(trans, ret);
@ -3067,14 +3068,15 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
if (owner_objectid < BTRFS_FIRST_FREE_OBJECTID &&
key.type == BTRFS_EXTENT_ITEM_KEY) {
struct btrfs_tree_block_info *bi;
if (item_size < sizeof(*ei) + sizeof(*bi)) {
btrfs_crit(info,
"invalid extent item size for key (%llu, %u, %llu) owner %llu, has %u expect >= %zu",
key.objectid, key.type, key.offset,
owner_objectid, item_size,
sizeof(*ei) + sizeof(*bi));
btrfs_abort_transaction(trans, -EUCLEAN);
goto err_dump;
abort_and_dump(trans, path,
"invalid extent item size for key (%llu, %u, %llu) slot %u owner %llu, has %u expect >= %zu",
key.objectid, key.type, key.offset,
path->slots[0], owner_objectid, item_size,
sizeof(*ei) + sizeof(*bi));
ret = -EUCLEAN;
goto out;
}
bi = (struct btrfs_tree_block_info *)(ei + 1);
WARN_ON(owner_objectid != btrfs_tree_block_level(leaf, bi));
@ -3082,11 +3084,11 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
refs = btrfs_extent_refs(leaf, ei);
if (refs < refs_to_drop) {
btrfs_crit(info,
"trying to drop %d refs but we only have %llu for bytenr %llu",
refs_to_drop, refs, bytenr);
btrfs_abort_transaction(trans, -EUCLEAN);
goto err_dump;
abort_and_dump(trans, path,
"trying to drop %d refs but we only have %llu for bytenr %llu slot %u",
refs_to_drop, refs, bytenr, path->slots[0]);
ret = -EUCLEAN;
goto out;
}
refs -= refs_to_drop;
@ -3099,10 +3101,11 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
*/
if (iref) {
if (!found_extent) {
btrfs_crit(info,
"invalid iref, got inlined extent ref but no EXTENT/METADATA_ITEM found");
btrfs_abort_transaction(trans, -EUCLEAN);
goto err_dump;
abort_and_dump(trans, path,
"invalid iref, got inlined extent ref but no EXTENT/METADATA_ITEM found, slot %u",
path->slots[0]);
ret = -EUCLEAN;
goto out;
}
} else {
btrfs_set_extent_refs(leaf, ei, refs);
@ -3121,21 +3124,21 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
if (found_extent) {
if (is_data && refs_to_drop !=
extent_data_ref_count(path, iref)) {
btrfs_crit(info,
"invalid refs_to_drop, current refs %u refs_to_drop %u",
extent_data_ref_count(path, iref),
refs_to_drop);
btrfs_abort_transaction(trans, -EUCLEAN);
goto err_dump;
abort_and_dump(trans, path,
"invalid refs_to_drop, current refs %u refs_to_drop %u slot %u",
extent_data_ref_count(path, iref),
refs_to_drop, path->slots[0]);
ret = -EUCLEAN;
goto out;
}
if (iref) {
if (path->slots[0] != extent_slot) {
btrfs_crit(info,
"invalid iref, extent item key (%llu %u %llu) doesn't have wanted iref",
key.objectid, key.type,
key.offset);
btrfs_abort_transaction(trans, -EUCLEAN);
goto err_dump;
abort_and_dump(trans, path,
"invalid iref, extent item key (%llu %u %llu) slot %u doesn't have wanted iref",
key.objectid, key.type,
key.offset, path->slots[0]);
ret = -EUCLEAN;
goto out;
}
} else {
/*
@ -3145,10 +3148,11 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
* [ EXTENT/METADATA_ITEM ][ SHARED_* ITEM ]
*/
if (path->slots[0] != extent_slot + 1) {
btrfs_crit(info,
"invalid SHARED_* item, previous item is not EXTENT/METADATA_ITEM");
btrfs_abort_transaction(trans, -EUCLEAN);
goto err_dump;
abort_and_dump(trans, path,
"invalid SHARED_* item slot %u, previous item is not EXTENT/METADATA_ITEM",
path->slots[0]);
ret = -EUCLEAN;
goto out;
}
path->slots[0] = extent_slot;
num_to_del = 2;
@ -3170,19 +3174,6 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
out:
btrfs_free_path(path);
return ret;
err_dump:
/*
* Leaf dump can take up a lot of log buffer, so we only do full leaf
* dump for debug build.
*/
if (IS_ENABLED(CONFIG_BTRFS_DEBUG)) {
btrfs_crit(info, "path->slots[0]=%d extent_slot=%d",
path->slots[0], extent_slot);
btrfs_print_leaf(path->nodes[0]);
}
btrfs_free_path(path);
return -EUCLEAN;
}
/*