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authorChuck Lever <chuck.lever@oracle.com>2010-01-26 14:04:22 -0500
committerJ. Bruce Fields <bfields@citi.umich.edu>2010-01-27 17:01:08 -0500
commit37498292aa97658a5d0a9bb84699ce8c1016bb74 (patch)
treed428a82fd275b739a7d631a2707314d76b82e84c /fs/nfsd/nfsctl.c
parent68717908155a9dcd4161f4d730fea478712d9794 (diff)
downloadlinux-37498292aa97658a5d0a9bb84699ce8c1016bb74.tar.bz2
NFSD: Create PF_INET6 listener in write_ports
Try to create a PF_INET6 listener for NFSD, if IPv6 is enabled in the kernel. Make sure nfsd_serv's reference count is decreased if __write_ports_addxprt() failed to create a listener. See __write_ports_addfd(). Our current plan is to rely on rpc.nfsd to create appropriate IPv6 listeners when server-side NFS/IPv6 support is desired. Legacy behavior, via the write_threads or write_svc kernel APIs, will remain the same -- only IPv4 listeners are created. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> [bfields@citi.umich.edu: Move error-handling code to end] Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/nfsd/nfsctl.c')
-rw-r--r--fs/nfsd/nfsctl.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index f43ecd61fa81..0f0e77f2012f 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -988,6 +988,7 @@ static ssize_t __write_ports_delfd(char *buf)
static ssize_t __write_ports_addxprt(char *buf)
{
char transport[16];
+ struct svc_xprt *xprt;
int port, err;
if (sscanf(buf, "%15s %4u", transport, &port) != 2)
@@ -1003,8 +1004,23 @@ static ssize_t __write_ports_addxprt(char *buf)
err = svc_create_xprt(nfsd_serv, transport,
PF_INET, port, SVC_SOCK_ANONYMOUS);
if (err < 0)
- return err;
+ goto out_err;
+
+ err = svc_create_xprt(nfsd_serv, transport,
+ PF_INET6, port, SVC_SOCK_ANONYMOUS);
+ if (err < 0 && err != -EAFNOSUPPORT)
+ goto out_close;
return 0;
+out_close:
+ xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port);
+ if (xprt != NULL) {
+ svc_close_xprt(xprt);
+ svc_xprt_put(xprt);
+ }
+out_err:
+ /* Decrease the count, but don't shut down the service */
+ nfsd_serv->sv_nrthreads--;
+ return err;
}
/*