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[PATCH] knfsd: Allow run-time selection of NFS versions to export

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Provide a file in the NFSD filesystem that allows setting and querying of
which version of NFS are being exported.  Changes are only allowed while no
server is running.

Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown 2005-11-07 01:00:25 -08:00 • committed by Linus Torvalds
parent 7390022d69
commit 70c3b76c28
4 changed files with 151 additions and 29 deletions
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17
include/linux/nfsd/syscall.h
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@ -39,6 +39,21 @@
#define NFSCTL_GETFD 7 /* get an fh by path (used by mountd) */
#define NFSCTL_GETFS 8 /* get an fh by path with max FH len */
/*
* Macros used to set version
*/
#define NFSCTL_VERSET(_cltbits, _v) ((_cltbits) |= (1 << (_v)))
#define NFSCTL_VERUNSET(_cltbits, _v) ((_cltbits) &= ~(1 << (_v)))
#define NFSCTL_VERISSET(_cltbits, _v) ((_cltbits) & (1 << (_v)))
#if defined(CONFIG_NFSD_V4)
#define NFSCTL_VERALL (0x1c /* 0b011100 */)
#elif defined(CONFIG_NFSD_V3)
#define NFSCTL_VERALL (0x0c /* 0b001100 */)
#else
#define NFSCTL_VERALL (0x04 /* 0b000100 */)
#endif
/* SVC */
struct nfsctl_svc {
unsigned short svc_port;
@ -120,6 +135,8 @@ extern int exp_delclient(struct nfsctl_client *ncp);
extern int exp_export(struct nfsctl_export *nxp);
extern int exp_unexport(struct nfsctl_export *nxp);
extern unsigned int nfsd_versbits;
#endif /* __KERNEL__ */
#endif /* NFSD_SYSCALL_H */