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authorAlexander Motin <mav@FreeBSD.org>2015-09-10 12:40:31 +0000
committerAlexander Motin <mav@FreeBSD.org>2015-09-10 12:40:31 +0000
commit7ac58230ea37d1b0a2095ff19bea8e928fd79bfc (patch)
tree21fdd7752fb9d89cacedc1ad0f81075a34353a18 /sys/cam/ctl/ctl_error.h
parentfb606ebabc5ead6411f33056f830fa3c9131a83c (diff)
downloadsrc-7ac58230ea37d1b0a2095ff19bea8e928fd79bfc.tar.gz
src-7ac58230ea37d1b0a2095ff19bea8e928fd79bfc.zip
Reimplement CTL High Availability.
CTL HA functionality was originally implemented by Copan many years ago, but large part of the sources was never published. This change includes clean room implementation of the missing code and fixes for many bugs. This code supports dual-node HA with ALUA in four modes: - Active/Unavailable without interlink between nodes; - Active/Standby with second node handling only basic LUN discovery and reservation, synchronizing with the first node through the interlink; - Active/Active with both nodes processing commands and accessing the backing storage, synchronizing with the first node through the interlink; - Active/Active with second node working as proxy, transfering all commands to the first node for execution through the interlink. Unlike original Copan's implementation, depending on specific hardware, this code uses simple custom TCP-based protocol for interlink. It has no authentication, so it should never be enabled on public interfaces. The code may still need some polishing, but generally it is functional. Relnotes: yes Sponsored by: iXsystems, Inc.
Notes
Notes: svn path=/head/; revision=287621
Diffstat (limited to 'sys/cam/ctl/ctl_error.h')
-rw-r--r--sys/cam/ctl/ctl_error.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/cam/ctl/ctl_error.h b/sys/cam/ctl/ctl_error.h
index 8430eef0bb02..4fa8060ea3a0 100644
--- a/sys/cam/ctl/ctl_error.h
+++ b/sys/cam/ctl/ctl_error.h
@@ -67,7 +67,9 @@ void ctl_set_invalid_opcode(struct ctl_scsiio *ctsio);
void ctl_set_param_len_error(struct ctl_scsiio *ctsio);
void ctl_set_already_locked(struct ctl_scsiio *ctsio);
void ctl_set_unsupported_lun(struct ctl_scsiio *ctsio);
+void ctl_set_lun_transit(struct ctl_scsiio *ctsio);
void ctl_set_lun_standby(struct ctl_scsiio *ctsio);
+void ctl_set_lun_unavail(struct ctl_scsiio *ctsio);
void ctl_set_internal_failure(struct ctl_scsiio *ctsio, int sks_valid,
uint16_t retry_count);
void ctl_set_medium_error(struct ctl_scsiio *ctsio);