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btrfs: tree-checker: Enhance output for check_extent_data_item 

Output the invalid member name and its bad value, along with its
expected value range or alignment.

Signed-off-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2017-10-09 01:51:06 +00:00 коммит произвёл David Sterba
Родитель d508c5f07c
Коммит 8806d7185b
1 изменённых файлов: 69 добавлений и 28 удалений
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97
fs/btrfs/tree-checker.c
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@ -31,12 +31,6 @@
#include "disk-io.h"
#include "compression.h"
#define CORRUPT(reason, eb, root, slot) \
btrfs_crit(root->fs_info, \
"corrupt %s, %s: block=%llu, root=%llu, slot=%d", \
btrfs_header_level(eb) == 0 ? "leaf" : "node", \
reason, btrfs_header_bytenr(eb), root->objectid, slot)
/*
* Error message should follow the following format:
* corrupt <type>: <identifier>, <reason>[, <bad_value>]
@ -77,6 +71,46 @@ 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 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 @alignment
* Else return 1
*/
#define CHECK_FE_ALIGNED(root, leaf, slot, fi, name, alignment) \
({ \
if (!IS_ALIGNED(btrfs_file_extent_##name((leaf), (fi)), (alignment))) \
file_extent_err((root), (leaf), (slot), \
"invalid %s for file extent, have %llu, should be aligned to %u", \
(#name), btrfs_file_extent_##name((leaf), (fi)), \
(alignment)); \
(!IS_ALIGNED(btrfs_file_extent_##name((leaf), (fi)), (alignment))); \
})
static int check_extent_data_item(struct btrfs_root *root,
struct extent_buffer *leaf,
struct btrfs_key *key, int slot)
@ -86,15 +120,19 @@ 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 file_offset for file extent, 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 type for file extent, have %u expect range [0, %u]",
btrfs_file_extent_type(leaf, fi),
BTRFS_FILE_EXTENT_TYPES);
return -EUCLEAN;
}
@ -103,18 +141,24 @@ 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 compression for file extent, 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 encryption for file extent, 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 file_offset for inline file extent, have %llu expect 0",
key->offset);
return -EUCLEAN;
}
@ -126,8 +170,10 @@ 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 ram_bytes for uncompressed inline extent, have %u expect %llu",
item_size, BTRFS_FILE_EXTENT_INLINE_DATA_START +
btrfs_file_extent_ram_bytes(leaf, fi));
return -EUCLEAN;
}
return 0;
@ -135,22 +181,17 @@ 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 item size for reg/prealloc file extent, 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_FE_ALIGNED(root, leaf, slot, fi, ram_bytes, sectorsize) ||
CHECK_FE_ALIGNED(root, leaf, slot, fi, disk_bytenr, sectorsize) ||
CHECK_FE_ALIGNED(root, leaf, slot, fi, disk_num_bytes, sectorsize) ||
CHECK_FE_ALIGNED(root, leaf, slot, fi, offset, sectorsize) ||
CHECK_FE_ALIGNED(root, leaf, slot, fi, num_bytes, sectorsize))
return -EUCLEAN;
}
return 0;
}