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| author | Bryan Schumaker <bjschuma@netapp.com> | 2010-09-29 21:41:49 +0200 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-10-08 00:48:49 +0200 |
| commit | 955a857e062642cd3ebe1dc7bb38c0f85d8f8f17 (patch) | |
| tree | f95fc349c245c4a0a3f6f8fcc5bf02f36a756134 /fs/nfs/Kconfig | |
| parent | NFS: We must use list_for_each_entry_safe in nfs_access_cache_shrinker (diff) | |
| download | linux-955a857e062642cd3ebe1dc7bb38c0f85d8f8f17.tar.xz linux-955a857e062642cd3ebe1dc7bb38c0f85d8f8f17.zip | |
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/Kconfig | 11 |
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. |