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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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79
fs/nfsd/nfssvc.c
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@ -30,6 +30,7 @@
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/stats.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/syscall.h>
#include <linux/lockd/bind.h>
#include <linux/nfsacl.h>
@ -52,7 +53,7 @@
extern struct svc_program nfsd_program;
static void nfsd(struct svc_rqst *rqstp);
struct timeval nfssvc_boot;
static struct svc_serv *nfsd_serv;
struct svc_serv *nfsd_serv;
static atomic_t nfsd_busy;
static unsigned long nfsd_last_call;
static DEFINE_SPINLOCK(nfsd_call_lock);
@ -63,6 +64,31 @@ struct nfsd_list {
};
static struct list_head nfsd_list = LIST_HEAD_INIT(nfsd_list);
static struct svc_version * nfsd_version[] = {
[2] = &nfsd_version2,
#if defined(CONFIG_NFSD_V3)
[3] = &nfsd_version3,
#endif
#if defined(CONFIG_NFSD_V4)
[4] = &nfsd_version4,
#endif
};
#define NFSD_MINVERS 2
#define NFSD_NRVERS (sizeof(nfsd_version)/sizeof(nfsd_version[0]))
static struct svc_version *nfsd_versions[NFSD_NRVERS];
struct svc_program nfsd_program = {
.pg_prog = NFS_PROGRAM, /* program number */
.pg_nvers = NFSD_NRVERS, /* nr of entries in nfsd_version */
.pg_vers = nfsd_versions, /* version table */
.pg_name = "nfsd", /* program name */
.pg_class = "nfsd", /* authentication class */
.pg_stats = &nfsd_svcstats, /* version table */
.pg_authenticate = &svc_set_client, /* export authentication */
};
/*
* Maximum number of nfsd processes
*/
@ -80,11 +106,12 @@ int
nfsd_svc(unsigned short port, int nrservs)
{
int error;
int none_left;
int none_left, found_one, i;
struct list_head *victim;
lock_kernel();
dprintk("nfsd: creating service\n");
dprintk("nfsd: creating service: vers 0x%x\n",
nfsd_versbits);
error = -EINVAL;
if (nrservs <= 0)
nrservs = 0;
@ -99,6 +126,27 @@ nfsd_svc(unsigned short port, int nrservs)
if (error<0)
goto out;
if (!nfsd_serv) {
/*
* Use the nfsd_ctlbits to define which
* versions that will be advertised.
* If nfsd_ctlbits doesn't list any version,
* export them all.
*/
found_one = 0;
for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) {
if (NFSCTL_VERISSET(nfsd_versbits, i)) {
nfsd_program.pg_vers[i] = nfsd_version[i];
found_one = 1;
} else
nfsd_program.pg_vers[i] = NULL;
}
if (!found_one) {
for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++)
nfsd_program.pg_vers[i] = nfsd_version[i];
}
atomic_set(&nfsd_busy, 0);
error = -ENOMEM;
nfsd_serv = svc_create(&nfsd_program, NFSD_BUFSIZE);
@ -389,28 +437,3 @@ static struct svc_stat nfsd_acl_svcstats = {
#else
#define nfsd_acl_program_p NULL
#endif /* defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) */
extern struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
static struct svc_version * nfsd_version[] = {
[2] = &nfsd_version2,
#if defined(CONFIG_NFSD_V3)
[3] = &nfsd_version3,
#endif
#if defined(CONFIG_NFSD_V4)
[4] = &nfsd_version4,
#endif
};
#define NFSD_NRVERS (sizeof(nfsd_version)/sizeof(nfsd_version[0]))
struct svc_program nfsd_program = {
.pg_next = nfsd_acl_program_p,
.pg_prog = NFS_PROGRAM, /* program number */
.pg_nvers = NFSD_NRVERS, /* nr of entries in nfsd_version */
.pg_vers = nfsd_version, /* version table */
.pg_name = "nfsd", /* program name */
.pg_class = "nfsd", /* authentication class */
.pg_stats = &nfsd_svcstats, /* version table */
.pg_authenticate = &svc_set_client, /* export authentication */
};