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authorNeilBrown <neilb@cse.unsw.edu.au>2005-11-07 01:00:25 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:48 -0800
commit70c3b76c28b012452d63bb27f6d0517afb05d86f (patch)
tree836c24891039fde8a59ee5db37def144bce16b90 /fs/nfsd/nfssvc.c
parent7390022d697bcc62a7556d6fdc61ec56ce3a381a (diff)
downloadop-kernel-dev-70c3b76c28b012452d63bb27f6d0517afb05d86f.zip
op-kernel-dev-70c3b76c28b012452d63bb27f6d0517afb05d86f.tar.gz
[PATCH] knfsd: Allow run-time selection of NFS versions to export
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>
Diffstat (limited to 'fs/nfsd/nfssvc.c')
-rw-r--r--fs/nfsd/nfssvc.c79
1 files changed, 51 insertions, 28 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 1697539..0568ff8 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -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 */
-
-};
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