linux-imx
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committed fcbf7637e66x
int udf_relocate_blocks(struct super_block *sb, long old_block, long *new_block)/* * partition.c * * PURPOSE * Partition handling routines for the OSTA-UDF(tm) filesystem. * * COPYRIGHT * This file is distributed under the terms of the GNU General Public * License (GPL). Copies of the GPL can be obtained from: * ftp://prep.ai.mit.edu/pub/gnu/GPL * Each contributing author retains all rights to their own work. * * (C) 1998-2001 Ben Fennema * * HISTORY * * 12/06/98 blf Created file. * */uint32_t udf_get_pblock(struct super_block *sb, uint32_t block, uint16_t partition, uint32_t offset){ struct udf_sb_info *sbi = UDF_SB(sb); struct udf_part_map *map; if (partition >= sbi->s_partitions) { udf_debug("block=%u, partition=%u, offset=%u: invalid partition\n", block, partition, offset); return 0xFFFFFFFF; } map = &sbi->s_partmaps[partition]; if (map->s_partition_func) return map->s_partition_func(sb, block, partition, offset); else return map->s_partition_root + block + offset;}uint32_t udf_get_pblock_virt15(struct super_block *sb, uint32_t block, uint16_t partition, uint32_t offset){ struct buffer_head *bh = NULL; uint32_t newblock; uint32_t index; uint32_t loc; struct udf_sb_info *sbi = UDF_SB(sb); struct udf_part_map *map; struct udf_virtual_data *vdata; struct udf_inode_info *iinfo = UDF_I(sbi->s_vat_inode); map = &sbi->s_partmaps[partition]; vdata = &map->s_type_specific.s_virtual; if (block > vdata->s_num_entries) { udf_debug("Trying to access block beyond end of VAT (%u max %u)\n", block, vdata->s_num_entries); return 0xFFFFFFFF; } if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { loc = le32_to_cpu(((__le32 *)(iinfo->i_ext.i_data + vdata->s_start_offset))[block]); goto translate; } index = (sb->s_blocksize - vdata->s_start_offset) / sizeof(uint32_t); if (block >= index) { block -= index; newblock = 1 + (block / (sb->s_blocksize / sizeof(uint32_t))); index = block % (sb->s_blocksize / sizeof(uint32_t)); } else { newblock = 0; index = vdata->s_start_offset / sizeof(uint32_t) + block; } loc = udf_block_map(sbi->s_vat_inode, newblock); bh = sb_bread(sb, loc); if (!bh) { udf_debug("get_pblock(UDF_VIRTUAL_MAP:%p,%u,%u) VAT: %u[%u]\n", sb, block, partition, loc, index); return 0xFFFFFFFF; } loc = le32_to_cpu(((__le32 *)bh->b_data)[index]);