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10081fb532
This introduces crc_t10dif_update() which enables to calculate CRC for a block which straddles multiple SG elements by calling multiple times. This also converts crc_t10dif() to use crc_t10dif_update() as they are almost same. (remove extra function call in crc_t10dif() and crc_t10dif_update - Tim + Herbert) Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Cc: linux-crypto@vger.kernel.org Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: target-devel@vger.kernel.org Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
15 lines
376 B
C
15 lines
376 B
C
#ifndef _LINUX_CRC_T10DIF_H
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#define _LINUX_CRC_T10DIF_H
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#include <linux/types.h>
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#define CRC_T10DIF_DIGEST_SIZE 2
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#define CRC_T10DIF_BLOCK_SIZE 1
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extern __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer,
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size_t len);
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extern __u16 crc_t10dif(unsigned char const *, size_t);
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extern __u16 crc_t10dif_update(__u16 crc, unsigned char const *, size_t);
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#endif
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