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authorBryan Schumaker <bjschuma@netapp.com>2010-09-29 15:41:49 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-10-07 18:48:49 -0400
commit955a857e062642cd3ebe1dc7bb38c0f85d8f8f17 (patch)
treef95fc349c245c4a0a3f6f8fcc5bf02f36a756134 /fs/nfs/Kconfig
parentaa510da5bfe1dfe263215fd0e05dac96e738a782 (diff)
downloadlinux-955a857e062642cd3ebe1dc7bb38c0f85d8f8f17.tar.bz2
NFS: new idmapper
This patch creates a new idmapper system that uses the request-key function to place a call into userspace to map user and group ids to names. The old idmapper was single threaded, which prevented more than one request from running at a single time. This means that a user would have to wait for an upcall to finish before accessing a cached result. The upcall result is stored on a keyring of type id_resolver. See the file Documentation/filesystems/nfs/idmapper.txt for instructions. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> [Trond: fix up the return value of nfs_idmap_lookup_name and clean up code] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/Kconfig')
-rw-r--r--fs/nfs/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 6c2aad49d731..3f69752d6f18 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig
@@ -116,3 +116,14 @@ config NFS_USE_KERNEL_DNS
select DNS_RESOLVER
select KEYS
default y
+
+config NFS_USE_NEW_IDMAPPER
+ bool "Use the new idmapper upcall routine"
+ depends on NFS_V4 && KEYS
+ help
+ Say Y here if you want NFS to use the new idmapper upcall functions.
+ You will need /sbin/request-key (usually provided by the keyutils
+ package). For details, read
+ <file:Documentation/filesystems/nfs/idmapper.txt>.
+
+ If you are unsure, say N.