Commit fdda387f authored by Patrick Caulfield's avatar Patrick Caulfield Committed by Steven Whitehouse
Browse files

[DLM] Add support for tcp communications 



The following patch adds a TCP based communications layer
to the DLM which is compile time selectable. The existing SCTP
layer gives the advantage of allowing multihoming, whereas
the TCP layer has been heavily tested in previous versions of
the DLM and is known to be robust and therefore can be used as
a baseline for performance testing.

Signed-off-by: default avatarPatrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
parent 61057c6b

fs/dlm/Kconfig

+17 −0
Original line number Diff line number Diff line
@@ -9,6 +9,23 @@ config DLM 
	A general purpose distributed lock manager for kernel or userspace

	applications.



choice

	prompt "Select DLM communications protocol"

	depends on DLM

	default DLM_TCP

	help

	The DLM Can use TCP or SCTP for it's network communications.

	SCTP supports multi-homed operations whereas TCP doesn't.

	However, SCTP seems to have stability problems at the moment.



config DLM_TCP

	bool "TCP/IP"



config DLM_SCTP

	bool "SCTP"



endchoice



config DLM_DEBUG

	bool "DLM debugging"

	depends on DLM

fs/dlm/Makefile

+3 −1
Original line number Diff line number Diff line
@@ -4,7 +4,6 @@ dlm-y := ast.o \ 
				dir.o \

				lock.o \

				lockspace.o \

				lowcomms.o \

				main.o \

				member.o \

				memory.o \
@@ -17,3 +16,6 @@ dlm-y := ast.o \ 
				util.o

dlm-$(CONFIG_DLM_DEBUG) +=	debug_fs.o



dlm-$(CONFIG_DLM_TCP)   += lowcomms-tcp.o



dlm-$(CONFIG_DLM_SCTP)  += lowcomms-sctp.o
 
 No newline at end of file

fs/dlm/lowcomms.c→fs/dlm/lowcomms-sctp.c

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fs/dlm/lowcomms-tcp.c

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