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Date: Tue, 5 Feb 2008 20:34:49 +0100
From: Marcin Slusarz <marcin.slusarz@...il.com>
To: Jan Kara <jack@...e.cz>
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 6/6] udf: super.c reorganization
On Tue, Feb 05, 2008 at 05:22:19PM +0100, Jan Kara wrote:
> Actually, the loop below would be even more readable it you did:
>
> if (map->s_partition_num == le16_to_cpu(p->partitionNumber))
> break;
> And do the work after we exit from the loop.
>
>
> > for (i = 0; i < sbi->s_partitions; i++) {
> > + struct partitionHeaderDesc *phd;
> > +
> > map = &sbi->s_partmaps[i];
> > udf_debug("Searching map: (%d == %d)\n",
> > map->s_partition_num,
> > le16_to_cpu(p->partitionNumber));
> > - if (map->s_partition_num ==
> > - le16_to_cpu(p->partitionNumber)) {
> > - map->s_partition_len =
> > - le32_to_cpu(p->partitionLength); /* blocks */
> > - map->s_partition_root =
> > - le32_to_cpu(p->partitionStartingLocation);
> > - if (p->accessType ==
> > - cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
> > - map->s_partition_flags |=
> > - UDF_PART_FLAG_READ_ONLY;
> > - if (p->accessType ==
> > - cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
> > - map->s_partition_flags |=
> > - UDF_PART_FLAG_WRITE_ONCE;
> > - if (p->accessType ==
> > - cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
> > + if (map->s_partition_num !=
> > + le16_to_cpu(p->partitionNumber))
> > + continue;
> > +
> > + map->s_partition_len =
> > + le32_to_cpu(p->partitionLength); /* blocks */
> > + map->s_partition_root =
> > + le32_to_cpu(p->partitionStartingLocation);
> > + if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
> > + map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
> > + if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
> > + map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
> > + if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
> > + map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
> > + if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
> > + map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
> > +
> > + if (strcmp(p->partitionContents.ident,
> > + PD_PARTITION_CONTENTS_NSR02) &&
> > + strcmp(p->partitionContents.ident,
> > + PD_PARTITION_CONTENTS_NSR03))
> > + break;
> > +
> > + phd = (struct partitionHeaderDesc *)
> > + (p->partitionContentsUse);
> > + if (phd->unallocSpaceTable.extLength) {
> > + kernel_lb_addr loc = {
> > + .logicalBlockNum = le32_to_cpu(
> > + phd->unallocSpaceTable.extPosition),
> > + .partitionReferenceNum = i,
> > + };
> > +
> > + map->s_uspace.s_table =
> > + udf_iget(sb, loc);
> > + if (!map->s_uspace.s_table) {
> > + udf_debug("cannot load unallocSpaceTable "
> > + "(part %d)\n", i);
> > + return 1;
> > + }
> > + map->s_partition_flags |=
> > + UDF_PART_FLAG_UNALLOC_TABLE;
> > + udf_debug("unallocSpaceTable (part %d) @ %ld\n",
> > + i, map->s_uspace.s_table->i_ino);
> > + }
> > + if (phd->unallocSpaceBitmap.extLength) {
> > + struct udf_bitmap *bitmap =
> > + udf_sb_alloc_bitmap(sb, i);
> > + map->s_uspace.s_bitmap = bitmap;
> > + if (bitmap != NULL) {
> > + bitmap->s_extLength = le32_to_cpu(
> > + phd->unallocSpaceBitmap.extLength);
> > + bitmap->s_extPosition = le32_to_cpu(
> > + phd->unallocSpaceBitmap.extPosition);
> > map->s_partition_flags |=
> > - UDF_PART_FLAG_REWRITABLE;
> > - if (p->accessType ==
> > - cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
> > + UDF_PART_FLAG_UNALLOC_BITMAP;
> > + udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
> > + i, bitmap->s_extPosition);
> > + }
> > + }
> > + if (phd->partitionIntegrityTable.extLength)
> > + udf_debug("partitionIntegrityTable (part %d)\n", i);
> > + if (phd->freedSpaceTable.extLength) {
> > + kernel_lb_addr loc = {
> > + .logicalBlockNum = le32_to_cpu(
> > + phd->freedSpaceTable.extPosition),
> > + .partitionReferenceNum = i,
> > + };
> > +
> > + map->s_fspace.s_table =
> > + udf_iget(sb, loc);
> > + if (!map->s_fspace.s_table) {
> > + udf_debug("cannot load freedSpaceTable "
> > + "(part %d)\n", i);
> > + return 1;
> > + }
> > + map->s_partition_flags |=
> > + UDF_PART_FLAG_FREED_TABLE;
> > + udf_debug("freedSpaceTable (part %d) @ %ld\n",
> > + i, map->s_fspace.s_table->i_ino);
> > + }
> > + if (phd->freedSpaceBitmap.extLength) {
> > + struct udf_bitmap *bitmap =
> > + udf_sb_alloc_bitmap(sb, i);
> > + map->s_fspace.s_bitmap = bitmap;
> > + if (bitmap != NULL) {
> > + bitmap->s_extLength = le32_to_cpu(
> > + phd->freedSpaceBitmap.extLength);
> > + bitmap->s_extPosition = le32_to_cpu(
> > + phd->freedSpaceBitmap.extPosition);
> > map->s_partition_flags |=
> > - UDF_PART_FLAG_OVERWRITABLE;
> > -
> > - if (!strcmp(p->partitionContents.ident,
> > - PD_PARTITION_CONTENTS_NSR02) ||
> > - !strcmp(p->partitionContents.ident,
> > - PD_PARTITION_CONTENTS_NSR03)) {
> > - struct partitionHeaderDesc *phd;
> > -
> > - phd = (struct partitionHeaderDesc *)
> > - (p->partitionContentsUse);
> > - if (phd->unallocSpaceTable.extLength) {
> > - kernel_lb_addr loc = {
> > - .logicalBlockNum = le32_to_cpu(phd->unallocSpaceTable.extPosition),
> > - .partitionReferenceNum = i,
> > - };
> > -
> > - map->s_uspace.s_table =
> > - udf_iget(sb, loc);
> > - if (!map->s_uspace.s_table) {
> > - udf_debug("cannot load unallocSpaceTable (part %d)\n", i);
> > - return 1;
> > - }
> > - map->s_partition_flags |=
> > - UDF_PART_FLAG_UNALLOC_TABLE;
> > - udf_debug("unallocSpaceTable (part %d) @ %ld\n",
> > - i, map->s_uspace.s_table->i_ino);
> > - }
> > - if (phd->unallocSpaceBitmap.extLength) {
> > - struct udf_bitmap *bitmap =
> > - udf_sb_alloc_bitmap(sb, i);
> > - map->s_uspace.s_bitmap = bitmap;
> > - if (bitmap != NULL) {
> > - bitmap->s_extLength =
> > - le32_to_cpu(phd->unallocSpaceBitmap.extLength);
> > - bitmap->s_extPosition =
> > - le32_to_cpu(phd->unallocSpaceBitmap.extPosition);
> > - map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
> > - udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
> > - i, bitmap->s_extPosition);
> > - }
> > - }
> > - if (phd->partitionIntegrityTable.extLength)
> > - udf_debug("partitionIntegrityTable (part %d)\n", i);
> > - if (phd->freedSpaceTable.extLength) {
> > - kernel_lb_addr loc = {
> > - .logicalBlockNum = le32_to_cpu(phd->freedSpaceTable.extPosition),
> > - .partitionReferenceNum = i,
> > - };
> > -
> > - map->s_fspace.s_table =
> > - udf_iget(sb, loc);
> > - if (!map->s_fspace.s_table) {
> > - udf_debug("cannot load freedSpaceTable (part %d)\n", i);
> > - return 1;
> > - }
> > - map->s_partition_flags |=
> > - UDF_PART_FLAG_FREED_TABLE;
> > - udf_debug("freedSpaceTable (part %d) @ %ld\n",
> > - i, map->s_fspace.s_table->i_ino);
> > - }
> > - if (phd->freedSpaceBitmap.extLength) {
> > - struct udf_bitmap *bitmap =
> > - udf_sb_alloc_bitmap(sb, i);
> > - map->s_fspace.s_bitmap = bitmap;
> > - if (bitmap != NULL) {
> > - bitmap->s_extLength =
> > - le32_to_cpu(phd->freedSpaceBitmap.extLength);
> > - bitmap->s_extPosition =
> > - le32_to_cpu(phd->freedSpaceBitmap.extPosition);
> > - map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
> > - udf_debug("freedSpaceBitmap (part %d) @ %d\n",
> > - i, bitmap->s_extPosition);
> > - }
> > - }
> > + UDF_PART_FLAG_FREED_BITMAP;
> > + udf_debug("freedSpaceBitmap (part %d) @ %d\n",
> > + i, bitmap->s_extPosition);
> > }
> > - break;
> > }
> > + break;
> > }
> > if (i == sbi->s_partitions)
> > udf_debug("Partition (%d) not found in partition map\n",
Ok. I didn't notice that. But it won't be as trivial as the rest. Separate patch?
Marcin
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