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nfsd41: control nfsv4.1 svc via /proc/fs/nfsd/versions

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Support enabling and disabling nfsv4.1 via /proc/fs/nfsd/versions
by writing the strings "+4.1" or "-4.1" correspondingly.

Use user mode nfs-utils (rpc.nfsd option) to enable.
This will allow us to get rid of CONFIG_NFSD_V4_1

[nfsd41: disable support for minorversion by default]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Benny Halevy
2009-04-03 08:28:59 +03:00
committed by J. Bruce Fields
parent 84459a1162
commit 8daf220a6a
4 changed files with 50 additions and 4 deletions
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24
fs/nfsd/nfssvc.c
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@@ -121,6 +121,8 @@ struct svc_program nfsd_program = {
};
u32 nfsd_supported_minorversion;
int nfsd_vers(int vers, enum vers_op change)
{
if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS)
@@ -147,6 +149,28 @@ int nfsd_vers(int vers, enum vers_op change)
}
return 0;
}
int nfsd_minorversion(u32 minorversion, enum vers_op change)
{
if (minorversion > NFSD_SUPPORTED_MINOR_VERSION)
return -1;
switch(change) {
case NFSD_SET:
nfsd_supported_minorversion = minorversion;
break;
case NFSD_CLEAR:
if (minorversion == 0)
return -1;
nfsd_supported_minorversion = minorversion - 1;
break;
case NFSD_TEST:
return minorversion <= nfsd_supported_minorversion;
case NFSD_AVAIL:
return minorversion <= NFSD_SUPPORTED_MINOR_VERSION;
}
return 0;
}
/*
* Maximum number of nfsd processes
*/