On Jan 15, 2010, at 5:44 PM, J. Bruce Fields wrote:
On Wed, Jan 13, 2010 at 04:10:48PM -0500, Chuck Lever wrote:
Try to use an PF_INET6 listener for NFSD if IPv6 is enabled in the
kernel.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
fs/nfsd/nfsctl.c | 36 +++++++++++++++++++++++++++++-------
fs/nfsd/nfssvc.c | 27 ++++++++++++++++++++++-----
2 files changed, 51 insertions(+), 12 deletions(-)
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 2604c3e..7ebb7a5 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -981,6 +981,26 @@ static ssize_t __write_ports_delfd(char *buf)
return len;
}
+static ssize_t __write_ports_create_xprt(struct svc_serv *serv,
+ const char *transport,
+ const int family,
+ const unsigned short port)
+{
+ int err;
+
+ err = svc_create_xprt(serv, transport, family, port,
+ SVC_SOCK_ANONYMOUS);
+
+ if (err < 0) {
+ /* Give a reasonable perror msg for bad transport string */
+ if (err == -ENOENT)
+ err = -EPROTONOSUPPORT;
+ return err;
+ }
+
+ return 0;
+}
+
/*
* A transport listener is added by writing it's transport name and
* a port number.
@@ -1000,14 +1020,16 @@ static ssize_t __write_ports_addxprt(char
*buf)
if (err != 0)
return err;
- err = svc_create_xprt(nfsd_serv, transport,
- PF_INET, port, SVC_SOCK_ANONYMOUS);
- if (err < 0) {
- /* Give a reasonable perror msg for bad transport string */
- if (err == -ENOENT)
- err = -EPROTONOSUPPORT;
+ err = __write_ports_create_xprt(nfsd_serv, transport, PF_INET,
port);
+ if (err < 0)
return err;
- }
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ err = __write_ports_create_xprt(nfsd_serv, transport, PF_INET6,
port);
+ if (err < 0 && err != -EAFNOSUPPORT)
+ return err;
+#endif /* CONFIG_IPV6 || CONFIG_IPV6_MODULE */
Does every caller of __write_ports_create_xprt() with PF_INET6 end up
being under this ifdef? Could we instead just move the ifdef inside
it
(or inside __svc_xpo_create())? (As usual I'd rather keep any
necessary
hidden away to the extent possible.)
The only two call sites are right here: one with PF_INET and one with
PF_INET6.
When IPv6 support is not enabled, we want only the first call (with
PF_INET). When IPv6 support is enabled, we want two calls; one with
PF_INET and then one with PF_INET6.
This particular interface is for creating a named transport. We don't
name our IPv6 transports separately from IPv4 transports, so this is a
simple way to get IPv6 enabled listeners. It's actually been a while
since I sat down and thought through this.
--b.
+
return 0;
}
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 171699e..7af14c1 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -275,14 +275,32 @@ int nfsd_create_serv(void)
return err;
}
-static int nfsd_init_socks(int port)
+static int nfsd_create_xprt(const char *transport, const unsigned
short port)
+{
+ int ret;
+
+ ret = svc_create_xprt(nfsd_serv, transport, PF_INET, port,
+ SVC_SOCK_DEFAULTS);
+ if (ret < 0)
+ return ret;
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ ret = svc_create_xprt(nfsd_serv, transport, PF_INET6, port,
+ SVC_SOCK_DEFAULTS);
+ if (ret < 0 && ret != -EAFNOSUPPORT)
+ return ret;
+#endif /* CONFIG_IPV6 || CONFIG_IPV6_MODULE */
+
+ return 0;
+}
+
+static int nfsd_init_socks(const unsigned short port)
{
int error;
if (!list_empty(&nfsd_serv->sv_permsocks))
return 0;
- error = svc_create_xprt(nfsd_serv, "udp", PF_INET, port,
- SVC_SOCK_DEFAULTS);
+ error = nfsd_create_xprt("udp", port);
if (error < 0)
return error;
@@ -290,8 +308,7 @@ static int nfsd_init_socks(int port)
if (error < 0)
return error;
- error = svc_create_xprt(nfsd_serv, "tcp", PF_INET, port,
- SVC_SOCK_DEFAULTS);
+ error = nfsd_create_xprt("tcp", port);
if (error < 0)
return error;
--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com
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