udf: Move filling of partition descriptor info into a separate function
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara
parent
2e0838fd0c
commit
3fb38dfa0e
198
fs/udf/super.c
198
fs/udf/super.c
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@ -1024,10 +1024,110 @@ static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
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return bitmap;
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}
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static int udf_fill_partdesc_info(struct super_block *sb,
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struct partitionDesc *p, int p_index)
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{
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struct udf_part_map *map;
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struct udf_sb_info *sbi = UDF_SB(sb);
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struct partitionHeaderDesc *phd;
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map = &sbi->s_partmaps[p_index];
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map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
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map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
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if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
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map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
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if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
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map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
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if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
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map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
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if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
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map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
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udf_debug("Partition (%d:%d type %x) starts at physical %d, "
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"block length %d\n", partitionNumber, p_index,
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map->s_partition_type, map->s_partition_root,
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map->s_partition_len);
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if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
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strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
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return 0;
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phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
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if (phd->unallocSpaceTable.extLength) {
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kernel_lb_addr loc = {
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.logicalBlockNum = le32_to_cpu(
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phd->unallocSpaceTable.extPosition),
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.partitionReferenceNum = p_index,
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};
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map->s_uspace.s_table = udf_iget(sb, loc);
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if (!map->s_uspace.s_table) {
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udf_debug("cannot load unallocSpaceTable (part %d)\n",
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p_index);
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return 1;
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}
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map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
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udf_debug("unallocSpaceTable (part %d) @ %ld\n",
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p_index, map->s_uspace.s_table->i_ino);
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}
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if (phd->unallocSpaceBitmap.extLength) {
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struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
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if (!bitmap)
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return 1;
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map->s_uspace.s_bitmap = bitmap;
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bitmap->s_extLength = le32_to_cpu(
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phd->unallocSpaceBitmap.extLength);
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bitmap->s_extPosition = le32_to_cpu(
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phd->unallocSpaceBitmap.extPosition);
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map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
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udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
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bitmap->s_extPosition);
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}
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if (phd->partitionIntegrityTable.extLength)
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udf_debug("partitionIntegrityTable (part %d)\n", p_index);
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if (phd->freedSpaceTable.extLength) {
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kernel_lb_addr loc = {
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.logicalBlockNum = le32_to_cpu(
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phd->freedSpaceTable.extPosition),
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.partitionReferenceNum = p_index,
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};
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map->s_fspace.s_table = udf_iget(sb, loc);
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if (!map->s_fspace.s_table) {
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udf_debug("cannot load freedSpaceTable (part %d)\n",
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p_index);
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return 1;
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}
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map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
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udf_debug("freedSpaceTable (part %d) @ %ld\n",
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p_index, map->s_fspace.s_table->i_ino);
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}
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if (phd->freedSpaceBitmap.extLength) {
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struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
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if (!bitmap)
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return 1;
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map->s_fspace.s_bitmap = bitmap;
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bitmap->s_extLength = le32_to_cpu(
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phd->freedSpaceBitmap.extLength);
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bitmap->s_extPosition = le32_to_cpu(
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phd->freedSpaceBitmap.extPosition);
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map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
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udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
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bitmap->s_extPosition);
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}
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return 0;
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}
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static int udf_load_partdesc(struct super_block *sb, sector_t block)
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{
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struct buffer_head *bh;
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struct partitionHeaderDesc *phd;
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struct partitionDesc *p;
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struct udf_part_map *map;
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struct udf_sb_info *sbi = UDF_SB(sb);
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@ -1060,101 +1160,7 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
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goto out_bh;
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}
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map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
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map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
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if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
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map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
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if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
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map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
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if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
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map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
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if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
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map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
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udf_debug("Partition (%d:%d type %x) starts at physical %d, "
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"block length %d\n", partitionNumber, i,
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map->s_partition_type, map->s_partition_root,
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map->s_partition_len);
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if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
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strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
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goto out_bh;
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phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
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if (phd->unallocSpaceTable.extLength) {
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kernel_lb_addr loc = {
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.logicalBlockNum = le32_to_cpu(
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phd->unallocSpaceTable.extPosition),
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.partitionReferenceNum = i,
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};
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map->s_uspace.s_table = udf_iget(sb, loc);
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if (!map->s_uspace.s_table) {
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udf_debug("cannot load unallocSpaceTable (part %d)\n",
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i);
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ret = 1;
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goto out_bh;
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}
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map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
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udf_debug("unallocSpaceTable (part %d) @ %ld\n",
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i, map->s_uspace.s_table->i_ino);
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}
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if (phd->unallocSpaceBitmap.extLength) {
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struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, i);
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if (!bitmap) {
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ret = 1;
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goto out_bh;
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}
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map->s_uspace.s_bitmap = bitmap;
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bitmap->s_extLength = le32_to_cpu(
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phd->unallocSpaceBitmap.extLength);
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bitmap->s_extPosition = le32_to_cpu(
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phd->unallocSpaceBitmap.extPosition);
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map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
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udf_debug("unallocSpaceBitmap (part %d) @ %d\n", i,
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bitmap->s_extPosition);
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}
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if (phd->partitionIntegrityTable.extLength)
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udf_debug("partitionIntegrityTable (part %d)\n", i);
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if (phd->freedSpaceTable.extLength) {
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kernel_lb_addr loc = {
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.logicalBlockNum = le32_to_cpu(
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phd->freedSpaceTable.extPosition),
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.partitionReferenceNum = i,
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};
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map->s_fspace.s_table = udf_iget(sb, loc);
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if (!map->s_fspace.s_table) {
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udf_debug("cannot load freedSpaceTable (part %d)\n", i);
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ret = 1;
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goto out_bh;
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}
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map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
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udf_debug("freedSpaceTable (part %d) @ %ld\n",
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i, map->s_fspace.s_table->i_ino);
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}
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if (phd->freedSpaceBitmap.extLength) {
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struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, i);
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if (!bitmap) {
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ret = 1;
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goto out_bh;
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}
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map->s_fspace.s_bitmap = bitmap;
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bitmap->s_extLength = le32_to_cpu(
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phd->freedSpaceBitmap.extLength);
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bitmap->s_extPosition = le32_to_cpu(
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phd->freedSpaceBitmap.extPosition);
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map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
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udf_debug("freedSpaceBitmap (part %d) @ %d\n", i,
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bitmap->s_extPosition);
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}
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ret = udf_fill_partdesc_info(sb, p, i);
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out_bh:
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/* In case loading failed, we handle cleanup in udf_fill_super */
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brelse(bh);
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