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authorJ. Bruce Fields <bfields@redhat.com>2012-03-22 16:07:18 -0400
committerJ. Bruce Fields <bfields@redhat.com>2012-03-26 11:49:48 -0400
commite9541ce8efc22c233a045f091c2b969923709038 (patch)
treedb3fc2a326dae9ada480bbdaeb08202a4b596098 /Documentation
parentcc27e0d407021a278d08c1952f5af4ab38c49eda (diff)
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op-kernel-dev-e9541ce8efc22c233a045f091c2b969923709038.tar.gz
nfsd4: allow numeric idmapping
Mimic the client side by providing a module parameter that turns off idmapping in the auth_sys case, for backwards compatibility with NFSv2 and NFSv3. Unlike in the client case, we don't have any way to negotiate, since the client can return an error to us if it doesn't like the id that we return to it in (for example) a getattr call. However, it has always been possible for servers to return numeric id's, and as far as we're aware clients have always been able to handle them. Also, in the auth_sys case clients already need to have numeric id's the same between client and server. Therefore we believe it's safe to default this to on; but the module parameter is available to return to previous behavior if this proves to be a problem in some unexpected setup. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 0d79a88f..e4f84f0 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1686,6 +1686,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
The default is to send the implementation identification
information.
+ nfsd.nfs4_disable_idmapping=
+ [NFSv4] When set to the default of '1', the NFSv4
+ server will return only numeric uids and gids to
+ clients using auth_sys, and will accept numeric uids
+ and gids from such clients. This is intended to ease
+ migration from NFSv2/v3.
objlayoutdriver.osd_login_prog=
[NFS] [OBJLAYOUT] sets the pathname to the program which
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