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authorChandra Seetharaman <sekharan@us.ibm.com>2008-05-01 14:50:11 -0700
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-06-05 09:23:41 -0500
commitcfae5c9bb66325cd32d5f2ee41f14749f062a53c (patch)
treeabceb01b7053f77366b37331e9b4f8408c89df60 /drivers/md/Kconfig
parent5e7dccad3621f6e2b572f309cf830a2c902cae80 (diff)
downloadop-kernel-dev-cfae5c9bb66325cd32d5f2ee41f14749f062a53c.zip
op-kernel-dev-cfae5c9bb66325cd32d5f2ee41f14749f062a53c.tar.gz
[SCSI] scsi_dh: Use SCSI device handler in dm-multipath
This patch converts dm-mpath to use scsi device handlers instead of dm's hardware handlers. This patch does not add any new functionality. Old behaviors remain and userspace tools work as is except that arguments supplied with hardware handler are ignored. One behavioral exception is: Activation of a path is synchronous in this patch, opposed to the older behavior of being asynchronous (changed in patch 07: scsi_dh: Add a single threaded workqueue for initializing a path) Note: There is no need to get a reference for the device handler module (as it was done in the dm hardware handler case) here as the reference is held when the device was first found. Instead we check and make sure that support for the specified device is present at table load time. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Acked-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/md/Kconfig')
-rw-r--r--drivers/md/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 610af91..5303af5 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -252,6 +252,7 @@ config DM_ZERO
config DM_MULTIPATH
tristate "Multipath target"
depends on BLK_DEV_DM
+ select SCSI_DH
---help---
Allow volume managers to support multipath hardware.
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