diff options
Diffstat (limited to 'fs/udf/partition.c')
| -rw-r--r-- | fs/udf/partition.c | 273 |
1 files changed, 176 insertions, 97 deletions
diff --git a/fs/udf/partition.c b/fs/udf/partition.c index 467a261..a95d830 100644 --- a/fs/udf/partition.c +++ b/fs/udf/partition.c @@ -28,106 +28,120 @@ #include <linux/slab.h> #include <linux/buffer_head.h> -inline uint32_t udf_get_pblock(struct super_block *sb, uint32_t block, uint16_t partition, uint32_t offset) +inline uint32_t udf_get_pblock(struct super_block *sb, uint32_t block, + uint16_t partition, uint32_t offset) { - if (partition >= UDF_SB_NUMPARTS(sb)) - { - udf_debug("block=%d, partition=%d, offset=%d: invalid partition\n", - block, partition, offset); + if (partition >= UDF_SB_NUMPARTS(sb)) { + udf_debug + ("block=%d, partition=%d, offset=%d: invalid partition\n", + block, partition, offset); return 0xFFFFFFFF; } if (UDF_SB_PARTFUNC(sb, partition)) - return UDF_SB_PARTFUNC(sb, partition)(sb, block, partition, offset); + return UDF_SB_PARTFUNC(sb, partition) (sb, block, partition, + offset); else return UDF_SB_PARTROOT(sb, partition) + block + offset; } -uint32_t udf_get_pblock_virt15(struct super_block *sb, uint32_t block, uint16_t partition, uint32_t 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; - index = (sb->s_blocksize - UDF_SB_TYPEVIRT(sb,partition).s_start_offset) / sizeof(uint32_t); + index = + (sb->s_blocksize - + UDF_SB_TYPEVIRT(sb, partition).s_start_offset) / sizeof(uint32_t); - if (block > UDF_SB_TYPEVIRT(sb,partition).s_num_entries) - { - udf_debug("Trying to access block beyond end of VAT (%d max %d)\n", - block, UDF_SB_TYPEVIRT(sb,partition).s_num_entries); + if (block > UDF_SB_TYPEVIRT(sb, partition).s_num_entries) { + udf_debug + ("Trying to access block beyond end of VAT (%d max %d)\n", + block, UDF_SB_TYPEVIRT(sb, partition).s_num_entries); return 0xFFFFFFFF; } - if (block >= index) - { + if (block >= index) { block -= index; newblock = 1 + (block / (sb->s_blocksize / sizeof(uint32_t))); index = block % (sb->s_blocksize / sizeof(uint32_t)); - } - else - { + } else { newblock = 0; - index = UDF_SB_TYPEVIRT(sb,partition).s_start_offset / sizeof(uint32_t) + block; + index = + UDF_SB_TYPEVIRT(sb, + partition).s_start_offset / + sizeof(uint32_t) + block; } loc = udf_block_map(UDF_SB_VAT(sb), newblock); - if (!(bh = sb_bread(sb, loc))) - { + if (!(bh = sb_bread(sb, loc))) { udf_debug("get_pblock(UDF_VIRTUAL_MAP:%p,%d,%d) VAT: %d[%d]\n", - sb, block, partition, loc, index); + sb, block, partition, loc, index); return 0xFFFFFFFF; } - loc = le32_to_cpu(((__le32 *)bh->b_data)[index]); + loc = le32_to_cpu(((__le32 *) bh->b_data)[index]); brelse(bh); - if (UDF_I_LOCATION(UDF_SB_VAT(sb)).partitionReferenceNum == partition) - { + if (UDF_I_LOCATION(UDF_SB_VAT(sb)).partitionReferenceNum == partition) { udf_debug("recursive call to udf_get_pblock!\n"); return 0xFFFFFFFF; } - return udf_get_pblock(sb, loc, UDF_I_LOCATION(UDF_SB_VAT(sb)).partitionReferenceNum, offset); + return udf_get_pblock(sb, loc, + UDF_I_LOCATION(UDF_SB_VAT(sb)). + partitionReferenceNum, offset); } -inline uint32_t udf_get_pblock_virt20(struct super_block *sb, uint32_t block, uint16_t partition, uint32_t offset) +inline uint32_t udf_get_pblock_virt20(struct super_block * sb, uint32_t block, + uint16_t partition, uint32_t offset) { return udf_get_pblock_virt15(sb, block, partition, offset); } -uint32_t udf_get_pblock_spar15(struct super_block *sb, uint32_t block, uint16_t partition, uint32_t offset) +uint32_t udf_get_pblock_spar15(struct super_block * sb, uint32_t block, + uint16_t partition, uint32_t offset) { int i; struct sparingTable *st = NULL; - uint32_t packet = (block + offset) & ~(UDF_SB_TYPESPAR(sb,partition).s_packet_len - 1); + uint32_t packet = + (block + offset) & ~(UDF_SB_TYPESPAR(sb, partition).s_packet_len - + 1); - for (i=0; i<4; i++) - { - if (UDF_SB_TYPESPAR(sb,partition).s_spar_map[i] != NULL) - { - st = (struct sparingTable *)UDF_SB_TYPESPAR(sb,partition).s_spar_map[i]->b_data; + for (i = 0; i < 4; i++) { + if (UDF_SB_TYPESPAR(sb, partition).s_spar_map[i] != NULL) { + st = (struct sparingTable *)UDF_SB_TYPESPAR(sb, + partition). + s_spar_map[i]->b_data; break; } } - if (st) - { - for (i=0; i<le16_to_cpu(st->reallocationTableLen); i++) - { - if (le32_to_cpu(st->mapEntry[i].origLocation) >= 0xFFFFFFF0) + if (st) { + for (i = 0; i < le16_to_cpu(st->reallocationTableLen); i++) { + if (le32_to_cpu(st->mapEntry[i].origLocation) >= + 0xFFFFFFF0) break; - else if (le32_to_cpu(st->mapEntry[i].origLocation) == packet) - { - return le32_to_cpu(st->mapEntry[i].mappedLocation) + - ((block + offset) & (UDF_SB_TYPESPAR(sb,partition).s_packet_len - 1)); - } - else if (le32_to_cpu(st->mapEntry[i].origLocation) > packet) + else if (le32_to_cpu(st->mapEntry[i].origLocation) == + packet) { + return le32_to_cpu(st->mapEntry[i]. + mappedLocation) + ((block + + offset) & + (UDF_SB_TYPESPAR + (sb, + partition). + s_packet_len + - 1)); + } else if (le32_to_cpu(st->mapEntry[i].origLocation) > + packet) break; } } - return UDF_SB_PARTROOT(sb,partition) + block + offset; + return UDF_SB_PARTROOT(sb, partition) + block + offset; } int udf_relocate_blocks(struct super_block *sb, long old_block, long *new_block) @@ -138,19 +152,21 @@ int udf_relocate_blocks(struct super_block *sb, long old_block, long *new_block) uint32_t packet; int i, j, k, l; - for (i=0; i<UDF_SB_NUMPARTS(sb); i++) - { - if (old_block > UDF_SB_PARTROOT(sb,i) && - old_block < UDF_SB_PARTROOT(sb,i) + UDF_SB_PARTLEN(sb,i)) + for (i = 0; i < UDF_SB_NUMPARTS(sb); i++) { + if (old_block > UDF_SB_PARTROOT(sb, i) && + old_block < UDF_SB_PARTROOT(sb, i) + UDF_SB_PARTLEN(sb, i)) { - sdata = &UDF_SB_TYPESPAR(sb,i); - packet = (old_block - UDF_SB_PARTROOT(sb,i)) & ~(sdata->s_packet_len - 1); - - for (j=0; j<4; j++) - { - if (UDF_SB_TYPESPAR(sb,i).s_spar_map[j] != NULL) - { - st = (struct sparingTable *)sdata->s_spar_map[j]->b_data; + sdata = &UDF_SB_TYPESPAR(sb, i); + packet = + (old_block - + UDF_SB_PARTROOT(sb, + i)) & ~(sdata->s_packet_len - 1); + + for (j = 0; j < 4; j++) { + if (UDF_SB_TYPESPAR(sb, i).s_spar_map[j] != + NULL) { + st = (struct sparingTable *)sdata-> + s_spar_map[j]->b_data; break; } } @@ -158,60 +174,123 @@ int udf_relocate_blocks(struct super_block *sb, long old_block, long *new_block) if (!st) return 1; - for (k=0; k<le16_to_cpu(st->reallocationTableLen); k++) - { - if (le32_to_cpu(st->mapEntry[k].origLocation) == 0xFFFFFFFF) - { - for (; j<4; j++) - { - if (sdata->s_spar_map[j]) - { - st = (struct sparingTable *)sdata->s_spar_map[j]->b_data; - st->mapEntry[k].origLocation = cpu_to_le32(packet); - udf_update_tag((char *)st, sizeof(struct sparingTable) + le16_to_cpu(st->reallocationTableLen) * sizeof(struct sparingEntry)); - mark_buffer_dirty(sdata->s_spar_map[j]); + for (k = 0; k < le16_to_cpu(st->reallocationTableLen); + k++) { + if (le32_to_cpu(st->mapEntry[k].origLocation) == + 0xFFFFFFFF) { + for (; j < 4; j++) { + if (sdata->s_spar_map[j]) { + st = (struct + sparingTable *) + sdata-> + s_spar_map[j]-> + b_data; + st->mapEntry[k]. + origLocation = + cpu_to_le32(packet); + udf_update_tag((char *) + st, + sizeof + (struct + sparingTable) + + + le16_to_cpu + (st-> + reallocationTableLen) + * + sizeof + (struct + sparingEntry)); + mark_buffer_dirty + (sdata-> + s_spar_map[j]); } } - *new_block = le32_to_cpu(st->mapEntry[k].mappedLocation) + - ((old_block - UDF_SB_PARTROOT(sb,i)) & (sdata->s_packet_len - 1)); + *new_block = + le32_to_cpu(st->mapEntry[k]. + mappedLocation) + + ((old_block - + UDF_SB_PARTROOT(sb, + i)) & (sdata-> + s_packet_len + - 1)); return 0; - } - else if (le32_to_cpu(st->mapEntry[k].origLocation) == packet) - { - *new_block = le32_to_cpu(st->mapEntry[k].mappedLocation) + - ((old_block - UDF_SB_PARTROOT(sb,i)) & (sdata->s_packet_len - 1)); + } else + if (le32_to_cpu + (st->mapEntry[k].origLocation) == + packet) { + *new_block = + le32_to_cpu(st->mapEntry[k]. + mappedLocation) + + ((old_block - + UDF_SB_PARTROOT(sb, + i)) & (sdata-> + s_packet_len + - 1)); return 0; - } - else if (le32_to_cpu(st->mapEntry[k].origLocation) > packet) + } else + if (le32_to_cpu + (st->mapEntry[k].origLocation) > packet) break; } - for (l=k; l<le16_to_cpu(st->reallocationTableLen); l++) - { - if (le32_to_cpu(st->mapEntry[l].origLocation) == 0xFFFFFFFF) - { - for (; j<4; j++) - { - if (sdata->s_spar_map[j]) - { - st = (struct sparingTable *)sdata->s_spar_map[j]->b_data; - mapEntry = st->mapEntry[l]; - mapEntry.origLocation = cpu_to_le32(packet); - memmove(&st->mapEntry[k+1], &st->mapEntry[k], (l-k)*sizeof(struct sparingEntry)); - st->mapEntry[k] = mapEntry; - udf_update_tag((char *)st, sizeof(struct sparingTable) + le16_to_cpu(st->reallocationTableLen) * sizeof(struct sparingEntry)); - mark_buffer_dirty(sdata->s_spar_map[j]); + for (l = k; l < le16_to_cpu(st->reallocationTableLen); + l++) { + if (le32_to_cpu(st->mapEntry[l].origLocation) == + 0xFFFFFFFF) { + for (; j < 4; j++) { + if (sdata->s_spar_map[j]) { + st = (struct + sparingTable *) + sdata-> + s_spar_map[j]-> + b_data; + mapEntry = + st->mapEntry[l]; + mapEntry.origLocation = + cpu_to_le32(packet); + memmove(&st-> + mapEntry[k + 1], + &st-> + mapEntry[k], + (l - + k) * + sizeof(struct + sparingEntry)); + st->mapEntry[k] = + mapEntry; + udf_update_tag((char *) + st, + sizeof + (struct + sparingTable) + + + le16_to_cpu + (st-> + reallocationTableLen) + * + sizeof + (struct + sparingEntry)); + mark_buffer_dirty + (sdata-> + s_spar_map[j]); } } - *new_block = le32_to_cpu(st->mapEntry[k].mappedLocation) + - ((old_block - UDF_SB_PARTROOT(sb,i)) & (sdata->s_packet_len - 1)); + *new_block = + le32_to_cpu(st->mapEntry[k]. + mappedLocation) + + ((old_block - + UDF_SB_PARTROOT(sb, + i)) & (sdata-> + s_packet_len + - 1)); return 0; } } return 1; } } - if (i == UDF_SB_NUMPARTS(sb)) - { + if (i == UDF_SB_NUMPARTS(sb)) { /* outside of partitions */ /* for now, fail =) */ return 1; |
