Output the invalid member name and its bad value, along with its
expected value range or alignment.
Signed-off-by: Qu Wenruo <quwenruo.btrfs@xxxxxxx>
---
fs/btrfs/tree-checker.c | 92 +++++++++++++++++++++++++++++++++++++------------
1 file changed, 70 insertions(+), 22 deletions(-)
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 52e9ab8c2a79..1324fcae93c0 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -63,6 +63,47 @@ static void generic_err(const struct btrfs_root *root,
va_end(args);
}
+/*
+ * Customized reporter for extent data item, since its key objectid and
+ * offset has its own meaning.
+ */
+__printf(4, 5)
+static void file_extent_err(const struct btrfs_root *root,
+ const struct extent_buffer *eb,
+ int slot, const char *fmt, ...)
+{
+ struct btrfs_key key;
+ struct va_format vaf;
+ va_list args;
+
+ btrfs_item_key_to_cpu(eb, &key, slot);
+ va_start(args, fmt);
+
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ btrfs_crit(root->fs_info,
+ "corrupt %s root=%llu tree_block=%llu slot=%d ino=%llu file_offset=%llu: %pV",
+ btrfs_header_level(eb) == 0 ? "leaf" : "node",
+ root->objectid, btrfs_header_bytenr(eb), slot,
+ key.objectid, key.offset, &vaf);
+ va_end(args);
+}
+
+/*
+ * Return 0 if the btrfs_file_extent_##name is aligned to @align
+ * Else return 1
+ */
+#define CHECK_FI_ALIGN(root, leaf, slot, fi, name, align) \
+({ \
+ if (!IS_ALIGNED(btrfs_file_extent_##name(leaf, fi), align)) \
+ file_extent_err(root, leaf, slot, \
+ "invalid file extent %s, have %llu, should be aligned to %u",\
+ #name, btrfs_file_extent_##name(leaf, fi), \
+ align); \
+ (!IS_ALIGNED(btrfs_file_extent_##name(leaf, fi), align)); \
+})
+
static int check_extent_data_item(struct btrfs_root *root,
struct extent_buffer *leaf,
struct btrfs_key *key, int slot)
@@ -72,15 +113,19 @@ static int check_extent_data_item(struct btrfs_root *root,
u32 item_size = btrfs_item_size_nr(leaf, slot);
if (!IS_ALIGNED(key->offset, sectorsize)) {
- CORRUPT("unaligned key offset for file extent",
- leaf, root, slot);
+ file_extent_err(root, leaf, slot,
+ "unaligned key offset, have %llu should be aligned to %u",
+ key->offset, sectorsize);
return -EUCLEAN;
}
fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
if (btrfs_file_extent_type(leaf, fi) > BTRFS_FILE_EXTENT_TYPES) {
- CORRUPT("invalid file extent type", leaf, root, slot);
+ file_extent_err(root, leaf, slot,
+ "invalid file extent type, have %u expect range [0, %u]",
+ btrfs_file_extent_type(leaf, fi),
+ BTRFS_FILE_EXTENT_TYPES);
return -EUCLEAN;
}
@@ -89,18 +134,24 @@ static int check_extent_data_item(struct btrfs_root *root,
* and must be caught in open_ctree().
*/
if (btrfs_file_extent_compression(leaf, fi) > BTRFS_COMPRESS_TYPES) {
- CORRUPT("invalid file extent compression", leaf, root, slot);
+ file_extent_err(root, leaf, slot,
+ "invalid file extent compression, have %u expect range [0, %u]",
+ btrfs_file_extent_compression(leaf, fi),
+ BTRFS_COMPRESS_TYPES);
return -EUCLEAN;
}
if (btrfs_file_extent_encryption(leaf, fi)) {
- CORRUPT("invalid file extent encryption", leaf, root, slot);
+ file_extent_err(root, leaf, slot,
+ "invalid file extent encryption, have %u expect 0",
+ btrfs_file_extent_encryption(leaf, fi));
return -EUCLEAN;
}
if (btrfs_file_extent_type(leaf, fi) == BTRFS_FILE_EXTENT_INLINE) {
/* Inline extent must have 0 as key offset */
if (key->offset) {
- CORRUPT("inline extent has non-zero key offset",
- leaf, root, slot);
+ file_extent_err(root, leaf, slot,
+ "invalid offset for inline extent, have %llu expect 0",
+ key->offset);
return -EUCLEAN;
}
@@ -112,8 +163,10 @@ static int check_extent_data_item(struct btrfs_root *root,
/* Uncompressed inline extent size must match item size */
if (item_size != BTRFS_FILE_EXTENT_INLINE_DATA_START +
btrfs_file_extent_ram_bytes(leaf, fi)) {
- CORRUPT("plaintext inline extent has invalid size",
- leaf, root, slot);
+ file_extent_err(root, leaf, slot,
+ "invalid uncompressed inline extent size, have %u expect %llu",
+ item_size, BTRFS_FILE_EXTENT_INLINE_DATA_START +
+ btrfs_file_extent_ram_bytes(leaf, fi));
return -EUCLEAN;
}
return 0;
@@ -121,22 +174,17 @@ static int check_extent_data_item(struct btrfs_root *root,
/* Regular or preallocated extent has fixed item size */
if (item_size != sizeof(*fi)) {
- CORRUPT(
- "regluar or preallocated extent data item size is invalid",
- leaf, root, slot);
+ file_extent_err(root, leaf, slot,
+ "invalid extent data item size for reg/prealloc, have %u expect %lu",
+ item_size, sizeof(*fi));
return -EUCLEAN;
}
- if (!IS_ALIGNED(btrfs_file_extent_ram_bytes(leaf, fi), sectorsize) ||
- !IS_ALIGNED(btrfs_file_extent_disk_bytenr(leaf, fi), sectorsize) ||
- !IS_ALIGNED(btrfs_file_extent_disk_num_bytes(leaf, fi), sectorsize) ||
- !IS_ALIGNED(btrfs_file_extent_offset(leaf, fi), sectorsize) ||
- !IS_ALIGNED(btrfs_file_extent_num_bytes(leaf, fi), sectorsize)) {
- CORRUPT(
- "regular or preallocated extent data item has unaligned value",
- leaf, root, slot);
+ if (CHECK_FI_ALIGN(root, leaf, slot, fi, ram_bytes, sectorsize) ||
+ CHECK_FI_ALIGN(root, leaf, slot, fi, disk_bytenr, sectorsize) ||
+ CHECK_FI_ALIGN(root, leaf, slot, fi, disk_num_bytes, sectorsize) ||
+ CHECK_FI_ALIGN(root, leaf, slot, fi, offset, sectorsize) ||
+ CHECK_FI_ALIGN(root, leaf, slot, fi, num_bytes, sectorsize))
return -EUCLEAN;
- }
-
return 0;
}
--
2.14.1
--
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