NFSD: don't report compiled-out versions as present
The /proc/fs/nfsd/versions file calls nfsd_vers() to check whether
the particular nfsd version is present/available. The problem is
that once I turn off e.g. NFSD-V4 this call returns -1 which is
true from the callers POV which is wrong.
The proposal is to report false in that case.
The bug has existed since 6658d3a7bb
"[PATCH] knfsd: remove
nfsd_versbits as intermediate storage for desired versions".
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: stable@kernel.org
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
parent
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commit
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@ -120,7 +120,7 @@ u32 nfsd_supported_minorversion;
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int nfsd_vers(int vers, enum vers_op change)
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int nfsd_vers(int vers, enum vers_op change)
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{
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{
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if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS)
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if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS)
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return -1;
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return 0;
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switch(change) {
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switch(change) {
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case NFSD_SET:
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case NFSD_SET:
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nfsd_versions[vers] = nfsd_version[vers];
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nfsd_versions[vers] = nfsd_version[vers];
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