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udf: use crc_itu_t from lib instead of udf_crc

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As pointed out by Sergey Vlasov, UDF implements its own version of
the CRC ITU-T V.41.  Convert it to use the one in the library.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Cc: Sergey Vlasov <vsu@altlinux.ru>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Bob Copeland
2008-04-17 09:47:48 +02:00
committed by Jan Kara
parent 706047a797
commit f845fced91
9 changed files with 32 additions and 203 deletions
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11
fs/udf/inode.c
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@@ -37,6 +37,7 @@
#include <linux/buffer_head.h>
#include <linux/writeback.h>
#include <linux/slab.h>
#include <linux/crc-itu-t.h>
#include "udf_i.h"
#include "udf_sb.h"
@@ -1419,9 +1420,9 @@ static int udf_update_inode(struct inode *inode, int do_sync)
iinfo->i_location.
logicalBlockNum);
use->descTag.descCRCLength = cpu_to_le16(crclen);
use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use +
sizeof(tag), crclen,
0));
use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
sizeof(tag),
crclen));
use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
mark_buffer_dirty(bh);
@@ -1584,8 +1585,8 @@ static int udf_update_inode(struct inode *inode, int do_sync)
crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc -
sizeof(tag);
fe->descTag.descCRCLength = cpu_to_le16(crclen);
fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag),
crclen, 0));
fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(tag),
crclen));
fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
/* write the data blocks */