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# IEC 62439-3 High-availability Seamless Redundancy
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config HSR
tristate "High-availability Seamless Redundancy (HSR)"
---help---
If you say Y here, then your Linux box will be able to act as a
DANH ("Doubly attached node implementing HSR"). For this to work,
your Linux box needs (at least) two physical Ethernet interfaces,
and it must be connected as a node in a ring network together with
other HSR capable nodes.
All Ethernet frames sent over the hsr device will be sent in both
directions on the ring (over both slave ports), giving a redundant,
instant fail-over network. Each HSR node in the ring acts like a
bridge for HSR frames, but filters frames that have been forwarded
earlier.
This code is a "best effort" to comply with the HSR standard as
described in IEC 62439-3:2010 (HSRv0) and IEC 62439-3:2012 (HSRv1),
but no compliancy tests have been made. Use iproute2 to select
the version you desire.
You need to perform any and all necessary tests yourself before
relying on this code in a safety critical system!
If unsure, say N.
emaclite-cleanup'>emaclite-cleanup
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
- use-after-free in algif_aead
- modular aesni regression when pcbc is modular but absent
- bug causing IO page faults in ccp
- double list add in ccp
- NULL pointer dereference in qat (two patches)
- panic in chcr
- NULL pointer dereference in chcr
- out-of-bound access in chcr
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: chcr - Fix key length for RFC4106
crypto: algif_aead - Fix kernel panic on list_del
crypto: aesni - Fix failure when pcbc module is absent
crypto: ccp - Fix double add when creating new DMA command
crypto: ccp - Fix DMA operations when IOMMU is enabled
crypto: chcr - Check device is allocated before use
crypto: chcr - Fix panic on dma_unmap_sg
crypto: qat - zero esram only for DH85x devices
crypto: qat - fix bar discovery for c62x