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checksums on extents

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This commit is contained in:
Bo Brantén
2020-02-18 11:32:32 +01:00
parent e7380fe12f
commit 857c69dbb6
3 changed files with 3754 additions and 3809 deletions
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23
Ext4Fsd/ext4/ext4_extents.c
View File

@@ -225,23 +225,6 @@ int ext4_ext_check_inode(struct inode *inode)
return ext4_ext_check(inode, ext_inode_hdr(inode), ext_depth(inode), 0);
}
static uint32_t ext4_ext_block_csum(struct inode *inode,
struct ext4_extent_header *eh)
{
/*return ext4_crc32c(inode->i_csum, eh, EXT4_EXTENT_TAIL_OFFSET(eh));*/
return 0;
}
static void ext4_extent_block_csum_set(struct inode *inode,
struct ext4_extent_header *eh)
{
struct ext4_extent_tail *tail;
tail = find_ext4_extent_tail(eh);
tail->et_checksum = ext4_ext_block_csum(
inode, eh);
}
static int ext4_split_extent_at(void *icb,
handle_t *handle,
struct inode *inode,
@@ -410,10 +393,8 @@ static int __ext4_ext_check(const char *function, unsigned int line,
}
tail = find_ext4_extent_tail(eh);
if (tail->et_checksum != ext4_ext_block_csum(inode, eh)) {
ext_debug("Warning: extent checksum damaged? tail->et_checksum = "
"%lu, ext4_ext_block_csum = %lu\n",
tail->et_checksum, ext4_ext_block_csum(inode, eh));
if (!ext4_extent_block_csum_verify(inode, eh)) {
ext_debug("Warning: extent checksum damaged?\n");
}
return 0;

48
Ext4Fsd/ext4/ext4_xattr.c
View File

@@ -115,49 +115,6 @@ static void ext4_xattr_rehash(struct ext4_xattr_header *header,
header->h_hash = cpu_to_le32(hash);
}
#if CONFIG_META_CSUM_ENABLE
static __u32
ext4_xattr_block_checksum(PEXT2_MCB inode_ref,
ext4_fsblk_t blocknr,
struct ext4_xattr_header *header)
{
__u32 checksum = 0;
__u64 le64_blocknr = blocknr;
struct ext4_sblock *sb = &inode_ref->fs->sb;
if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_METADATA_CSUM)) {
__u32 orig_checksum;
/* Preparation: temporarily set bg checksum to 0 */
orig_checksum = header->h_checksum;
header->h_checksum = 0;
/* First calculate crc32 checksum against fs uuid */
checksum = ext4_crc32c(EXT4_CRC32_INIT, sb->uuid,
sizeof(sb->uuid));
/* Then calculate crc32 checksum block number */
checksum = ext4_crc32c(checksum, &le64_blocknr,
sizeof(le64_blocknr));
/* Finally calculate crc32 checksum against
* the entire xattr block */
checksum = ext4_crc32c(checksum, header,
ext4_sb_get_block_size(sb));
header->h_checksum = orig_checksum;
}
return checksum;
}
#else
#define ext4_xattr_block_checksum(...) 0
#endif
static void
ext4_xattr_set_block_checksum(PEXT2_MCB inode_ref,
ext4_fsblk_t blocknr,
struct ext4_xattr_header *header)
{
/* TODO: Need METADATA_CSUM supports. */
header->h_checksum = 0;
}
static int ext4_xattr_item_cmp(struct rb_node *_a,
struct rb_node *_b)
{
@@ -965,9 +922,8 @@ static int ext4_xattr_write_to_disk(struct ext4_xattr_ref *xattr_ref)
if (block_modified) {
ext4_xattr_rehash(block_header,
EXT4_XATTR_BFIRST(xattr_ref->block_bh));
ext4_xattr_set_block_checksum(xattr_ref->inode_ref,
xattr_ref->block_bh->b_blocknr,
block_header);
/*ext4_xattr_block_csum_set(inode,
xattr_ref->block_bh);*/
extents_mark_buffer_dirty(xattr_ref->block_bh);
}

8
Ext4Fsd/include/linux/ext4.h
View File

@@ -3378,6 +3378,10 @@ int ext4_inode_csum_verify(struct inode *inode, struct ext4_inode *raw,
struct ext4_inode_info *ei);
void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw,
struct ext4_inode_info *ei);
int ext4_extent_block_csum_verify(struct inode *inode,
struct ext4_extent_header *eh);
void ext4_extent_block_csum_set(struct inode *inode,
struct ext4_extent_header *eh);
void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
unsigned int blocksize);
int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent);
@@ -3386,6 +3390,10 @@ void ext4_dirent_csum_set(struct inode *inode,
int ext4_dx_csum_verify(struct inode *inode,
struct ext4_dir_entry *dirent);
void ext4_dx_csum_set(struct inode *inode, struct ext4_dir_entry *dirent);
int ext4_xattr_block_csum_verify(struct inode *inode,
struct buffer_head *bh);
void ext4_xattr_block_csum_set(struct inode *inode,
struct buffer_head *bh);
//
// Use default packing of structures