errcode_t ocfs2_write_extent_block(ocfs2_filesys *fs, uint64_t blkno,
char *eb_buf)
{
errcode_t ret;
char *blk;
struct ocfs2_extent_block *eb;
if (!(fs->fs_flags & OCFS2_FLAG_RW))
return OCFS2_ET_RO_FILESYS;
if ((blkno < OCFS2_SUPER_BLOCK_BLKNO) ||
(blkno > fs->fs_blocks))
return OCFS2_ET_BAD_BLKNO;
ret = ocfs2_malloc_block(fs->fs_io, &blk);
if (ret)
return ret;
memcpy(blk, eb_buf, fs->fs_blocksize);
eb = (struct ocfs2_extent_block *) blk;
ocfs2_swap_extent_block_from_cpu(fs, eb);
ocfs2_compute_meta_ecc(fs, blk, &eb->h_check);
ret = io_write_block(fs->fs_io, blkno, 1, blk);
if (ret)
goto out;
fs->fs_flags |= OCFS2_FLAG_CHANGED;
ret = 0;
out:
ocfs2_free(&blk);
return ret;
}
/*
* dump_block_check
*
*/
void dump_block_check(FILE *out, struct ocfs2_block_check *bc, void *block)
{
struct ocfs2_block_check tmp = *bc;
int crc_fail;
enum ocfs2_block_type bt = ocfs2_detect_block(block);
/* Swap block to little endian for compute_meta_ecc */
switch (bt) {
case OCFS2_BLOCK_INODE:
case OCFS2_BLOCK_SUPERBLOCK:
ocfs2_swap_inode_from_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_EXTENT_BLOCK:
ocfs2_swap_extent_block_from_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_GROUP_DESCRIPTOR:
ocfs2_swap_group_desc_from_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_DIR_BLOCK:
ocfs2_swap_dir_entries_from_cpu(block,
gbls.fs->fs_blocksize);
break;
case OCFS2_BLOCK_XATTR:
ocfs2_swap_xattr_block_from_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_REFCOUNT:
ocfs2_swap_refcount_block_from_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_DXROOT:
ocfs2_swap_dx_root_from_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_DXLEAF:
ocfs2_swap_dx_leaf_from_cpu(block);
break;
default:
fprintf(out, "Unable to determine block type");
return;
}
/* Re-compute based on what we got from disk */
ocfs2_compute_meta_ecc(gbls.fs, block, bc);
/* Swap block back to CPU */
switch (bt) {
case OCFS2_BLOCK_INODE:
case OCFS2_BLOCK_SUPERBLOCK:
ocfs2_swap_inode_to_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_EXTENT_BLOCK:
ocfs2_swap_extent_block_to_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_GROUP_DESCRIPTOR:
ocfs2_swap_group_desc_to_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_DIR_BLOCK:
ocfs2_swap_dir_entries_to_cpu(block,
gbls.fs->fs_blocksize);
break;
case OCFS2_BLOCK_XATTR:
ocfs2_swap_xattr_block_to_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_REFCOUNT:
ocfs2_swap_refcount_block_to_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_DXROOT:
ocfs2_swap_dx_root_to_cpu(gbls.fs, block);
break;
case OCFS2_BLOCK_DXLEAF:
ocfs2_swap_dx_leaf_to_cpu(block);
break;
default:
break;
}
crc_fail = memcmp(bc, &tmp, sizeof(*bc));
fprintf(out, "\tCRC32: %.8"PRIx32" ECC: %.4"PRIx16"\n",
le32_to_cpu(tmp.bc_crc32e), le16_to_cpu(tmp.bc_ecc));
if (crc_fail)
fprintf(out, "\t**FAILED CHECKSUM** Computed CRC32: %.8"
PRIx32" ECC: %.4"PRIx16"\n",
le32_to_cpu(bc->bc_crc32e), le16_to_cpu(bc->bc_ecc));
/* Leave the block as we found it. */
*bc = tmp;
}
