Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 226 insertions, 0 deletions

diff --git a/fs/udf/partition.c b/fs/udf/partition.c
new file mode 100644
index 00000000000..4d36f264be0
--- /dev/null
+++ b/fs/udf/partition.c
@@ -0,0 +1,226 @@
+/*
+ * partition.c
+ *
+ * PURPOSE
+ *      Partition handling routines for the OSTA-UDF(tm) filesystem.
+ *
+ * CONTACTS
+ *      E-mail regarding any portion of the Linux UDF file system should be
+ *      directed to the development team mailing list (run by majordomo):
+ *              linux_udf@hpesjro.fc.hp.com
+ *
+ * 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. 
+ *
+ */
+
+#include "udfdecl.h"
+#include "udf_sb.h"
+#include "udf_i.h"
+
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/udf_fs.h>
+#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)
+{
+	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);
+	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)
+{
+	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);
+
+	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)
+	{
+		block -= index;
+		newblock = 1 + (block / (sb->s_blocksize / sizeof(uint32_t)));
+		index = block % (sb->s_blocksize / sizeof(uint32_t));
+	}
+	else
+	{
+		newblock = 0;
+		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)))
+	{
+		udf_debug("get_pblock(UDF_VIRTUAL_MAP:%p,%d,%d) VAT: %d[%d]\n",
+			sb, block, partition, loc, index);
+		return 0xFFFFFFFF;
+	}
+
+	loc = le32_to_cpu(((__le32 *)bh->b_data)[index]);
+
+	udf_release_data(bh);
+
+	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);
+}
+
+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)
+{
+	int i;
+	struct sparingTable *st = NULL;
+	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;
+			break;
+		}
+	}
+
+	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)
+				break;
+		}
+	}
+	return UDF_SB_PARTROOT(sb,partition) + block + offset;
+}
+
+int udf_relocate_blocks(struct super_block *sb, long old_block, long *new_block)
+{
+	struct udf_sparing_data *sdata;
+	struct sparingTable *st = NULL;
+	struct sparingEntry mapEntry;
+	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))
+		{
+			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;
+				}
+			}
+
+			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]);
+						}
+					}
+					*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));
+					return 0;
+				}
+				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]);
+						}
+					}
+					*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))
+	{
+		/* outside of partitions */
+		/* for now, fail =) */
+		return 1;
+	}
+
+	return 0;
+}