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-rw-r--r--crypto/Kconfig37
1 files changed, 25 insertions, 12 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 1fda21abb0d1..6dea21229376 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1093,34 +1093,47 @@ endmenu
menu "CRCs (cyclic redundancy checks)"
config CRYPTO_CRC32C
- tristate "CRC32c CRC algorithm"
+ tristate "CRC32c"
select CRYPTO_HASH
select CRC32
help
- Castagnoli, et al Cyclic Redundancy-Check Algorithm. Used
- by iSCSI for header and data digests and by others.
- See Castagnoli93. Module will be crc32c.
+ CRC32c CRC algorithm with the iSCSI polynomial (RFC 3385 and RFC 3720)
+
+ A 32-bit CRC (cyclic redundancy check) with a polynomial defined
+ by G. Castagnoli, S. Braeuer and M. Herrman in "Optimization of Cyclic
+ Redundancy-Check Codes with 24 and 32 Parity Bits", IEEE Transactions
+ on Communications, Vol. 41, No. 6, June 1993, selected for use with
+ iSCSI.
+
+ Used by btrfs, ext4, jbd2, NVMeoF/TCP, and iSCSI.
config CRYPTO_CRC32
- tristate "CRC32 CRC algorithm"
+ tristate "CRC32"
select CRYPTO_HASH
select CRC32
help
- CRC-32-IEEE 802.3 cyclic redundancy-check algorithm.
- Shash crypto api wrappers to crc32_le function.
+ CRC32 CRC algorithm (IEEE 802.3)
+
+ Used by RoCEv2 and f2fs.
config CRYPTO_CRCT10DIF
- tristate "CRCT10DIF algorithm"
+ tristate "CRCT10DIF"
select CRYPTO_HASH
help
- CRC T10 Data Integrity Field computation is being cast as
- a crypto transform. This allows for faster crc t10 diff
- transforms to be used if they are available.
+ CRC16 CRC algorithm used for the T10 (SCSI) Data Integrity Field (DIF)
+
+ CRC algorithm used by the SCSI Block Commands standard.
config CRYPTO_CRC64_ROCKSOFT
- tristate "Rocksoft Model CRC64 algorithm"
+ tristate "CRC64 based on Rocksoft Model algorithm"
depends on CRC64
select CRYPTO_HASH
+ help
+ CRC64 CRC algorithm based on the Rocksoft Model CRC Algorithm
+
+ Used by the NVMe implementation of T10 DIF (BLK_DEV_INTEGRITY)
+
+ See https://zlib.net/crc_v3.txt
endmenu