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-rw-r--r--Documentation/kernel-parameters.txt17
-rw-r--r--fs/nfs/client.c2
2 files changed, 12 insertions, 7 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 81c287fad79d..dfd21cfdf579 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1630,12 +1630,17 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
The default is to return 64-bit inode numbers.
nfs.nfs4_disable_idmapping=
- [NFSv4] When set, this option disables the NFSv4
- idmapper on the client, but only if the mount
- is using the 'sec=sys' security flavour. This may
- make migration from legacy NFSv2/v3 systems easier
- provided that the server has the appropriate support.
- The default is to always enable NFSv4 idmapping.
+ [NFSv4] When set to the default of '1', this option
+ ensures that both the RPC level authentication
+ scheme and the NFS level operations agree to use
+ numeric uids/gids if the mount is using the
+ 'sec=sys' security flavour. In effect it is
+ disabling idmapping, which can make migration from
+ legacy NFSv2/v3 systems to NFSv4 easier.
+ Servers that do not support this mode of operation
+ will be autodetected by the client, and it will fall
+ back to using the idmapper.
+ To turn off this behaviour, set the value to '0'.
nmi_debug= [KNL,AVR32,SH] Specify one or more actions to take
when a NMI is triggered.
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 41bd67f80d31..277dfaf2e99a 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -84,7 +84,7 @@ retry:
/*
* Turn off NFSv4 uid/gid mapping when using AUTH_SYS
*/
-static int nfs4_disable_idmapping = 0;
+static int nfs4_disable_idmapping = 1;
/*
* RPC cruft for NFS