#include <linux/fs.h>
#include <linux/string.h>
#include <linux/buffer_head.h>
+#include <linux/crc-itu-t.h>
#include "udf_i.h"
#include "udf_sb.h"
}
}
/* rewrite CRC + checksum of eahd */
- crclen = sizeof(struct extendedAttrHeaderDesc) - sizeof(tag);
+ crclen = sizeof(struct extendedAttrHeaderDesc) - sizeof(struct tag);
eahd->descTag.descCRCLength = cpu_to_le16(crclen);
- eahd->descTag.descCRC = cpu_to_le16(udf_crc((char *)eahd +
- sizeof(tag), crclen, 0));
+ eahd->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)eahd +
+ sizeof(struct tag), crclen));
eahd->descTag.tagChecksum = udf_tag_checksum(&eahd->descTag);
iinfo->i_lenEAttr += size;
return (struct genericFormat *)&ea[offset];
struct buffer_head *udf_read_tagged(struct super_block *sb, uint32_t block,
uint32_t location, uint16_t *ident)
{
- tag *tag_p;
+ struct tag *tag_p;
struct buffer_head *bh = NULL;
- struct udf_sb_info *sbi = UDF_SB(sb);
/* Read the block */
if (block == 0xFFFFFFFF)
return NULL;
- bh = udf_tread(sb, block + sbi->s_session);
+ bh = udf_tread(sb, block);
if (!bh) {
udf_debug("block=%d, location=%d: read failed\n",
- block + sbi->s_session, location);
+ block, location);
return NULL;
}
- tag_p = (tag *)(bh->b_data);
+ tag_p = (struct tag *)(bh->b_data);
*ident = le16_to_cpu(tag_p->tagIdent);
if (location != le32_to_cpu(tag_p->tagLocation)) {
udf_debug("location mismatch block %u, tag %u != %u\n",
- block + sbi->s_session,
- le32_to_cpu(tag_p->tagLocation), location);
+ block, le32_to_cpu(tag_p->tagLocation), location);
goto error_out;
}
}
/* Verify the descriptor CRC */
- if (le16_to_cpu(tag_p->descCRCLength) + sizeof(tag) > sb->s_blocksize ||
- le16_to_cpu(tag_p->descCRC) == udf_crc(bh->b_data + sizeof(tag),
- le16_to_cpu(tag_p->descCRCLength), 0))
+ if (le16_to_cpu(tag_p->descCRCLength) + sizeof(struct tag) > sb->s_blocksize ||
+ le16_to_cpu(tag_p->descCRC) == crc_itu_t(0,
+ bh->b_data + sizeof(struct tag),
+ le16_to_cpu(tag_p->descCRCLength)))
return bh;
- udf_debug("Crc failure block %d: crc = %d, crclen = %d\n",
- block + sbi->s_session, le16_to_cpu(tag_p->descCRC),
- le16_to_cpu(tag_p->descCRCLength));
+ udf_debug("Crc failure block %d: crc = %d, crclen = %d\n", block,
+ le16_to_cpu(tag_p->descCRC), le16_to_cpu(tag_p->descCRCLength));
error_out:
brelse(bh);
return NULL;
}
-struct buffer_head *udf_read_ptagged(struct super_block *sb, kernel_lb_addr loc,
+struct buffer_head *udf_read_ptagged(struct super_block *sb,
+ struct kernel_lb_addr *loc,
uint32_t offset, uint16_t *ident)
{
return udf_read_tagged(sb, udf_get_lb_pblock(sb, loc, offset),
- loc.logicalBlockNum + offset, ident);
+ loc->logicalBlockNum + offset, ident);
}
void udf_update_tag(char *data, int length)
{
- tag *tptr = (tag *)data;
- length -= sizeof(tag);
+ struct tag *tptr = (struct tag *)data;
+ length -= sizeof(struct tag);
tptr->descCRCLength = cpu_to_le16(length);
- tptr->descCRC = cpu_to_le16(udf_crc(data + sizeof(tag), length, 0));
+ tptr->descCRC = cpu_to_le16(crc_itu_t(0, data + sizeof(struct tag), length));
tptr->tagChecksum = udf_tag_checksum(tptr);
}
void udf_new_tag(char *data, uint16_t ident, uint16_t version, uint16_t snum,
uint32_t loc, int length)
{
- tag *tptr = (tag *)data;
+ struct tag *tptr = (struct tag *)data;
tptr->tagIdent = cpu_to_le16(ident);
tptr->descVersion = cpu_to_le16(version);
tptr->tagSerialNum = cpu_to_le16(snum);
udf_update_tag(data, length);
}
-u8 udf_tag_checksum(const tag *t)
+u8 udf_tag_checksum(const struct tag *t)
{
u8 *data = (u8 *)t;
u8 checksum = 0;
int i;
- for (i = 0; i < sizeof(tag); ++i)
+ for (i = 0; i < sizeof(struct tag); ++i)
if (i != 4) /* position of checksum */
checksum += data[i];
return checksum;