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-rw-r--r--kernels/linux-libre-knock/0002-sunrpc-replace-sunrpc_net-gssd_running-flag-with-a-m.patch143
1 files changed, 143 insertions, 0 deletions
diff --git a/kernels/linux-libre-knock/0002-sunrpc-replace-sunrpc_net-gssd_running-flag-with-a-m.patch b/kernels/linux-libre-knock/0002-sunrpc-replace-sunrpc_net-gssd_running-flag-with-a-m.patch
new file mode 100644
index 000000000..19e04da5d
--- /dev/null
+++ b/kernels/linux-libre-knock/0002-sunrpc-replace-sunrpc_net-gssd_running-flag-with-a-m.patch
@@ -0,0 +1,143 @@
+From 89f842435c630f8426f414e6030bc2ffea0d6f81 Mon Sep 17 00:00:00 2001
+From: Jeff Layton <jlayton@redhat.com>
+Date: Thu, 14 Nov 2013 07:25:18 -0500
+Subject: [PATCH 2/6] sunrpc: replace sunrpc_net->gssd_running flag with a more
+ reliable check
+
+Now that we have a more reliable method to tell if gssd is running, we
+can replace the sn->gssd_running flag with a function that will query to
+see if it's up and running.
+
+There's also no need to attempt an upcall that we know will fail, so
+just return -EACCES if gssd isn't running. Finally, fix the warn_gss()
+message not to claim that that the upcall timed out since we don't
+necesarily perform one now when gssd isn't running, and remove the
+extraneous newline from the message.
+
+Signed-off-by: Jeff Layton <jlayton@redhat.com>
+Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
+---
+ include/linux/sunrpc/rpc_pipe_fs.h | 2 ++
+ net/sunrpc/auth_gss/auth_gss.c | 17 +++++++----------
+ net/sunrpc/netns.h | 2 --
+ net/sunrpc/rpc_pipe.c | 14 ++++++++++----
+ 4 files changed, 19 insertions(+), 16 deletions(-)
+
+diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h
+index 85f1342..7f490be 100644
+--- a/include/linux/sunrpc/rpc_pipe_fs.h
++++ b/include/linux/sunrpc/rpc_pipe_fs.h
+@@ -131,5 +131,7 @@ extern int rpc_unlink(struct dentry *);
+ extern int register_rpc_pipefs(void);
+ extern void unregister_rpc_pipefs(void);
+
++extern bool gssd_running(struct net *net);
++
+ #endif
+ #endif
+diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
+index 42fdfc6..0a2aee0 100644
+--- a/net/sunrpc/auth_gss/auth_gss.c
++++ b/net/sunrpc/auth_gss/auth_gss.c
+@@ -536,8 +536,7 @@ static void warn_gssd(void)
+ unsigned long now = jiffies;
+
+ if (time_after(now, ratelimit)) {
+- printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n"
+- "Please check user daemon is running.\n");
++ pr_warn("RPC: AUTH_GSS upcall failed. Please check user daemon is running.\n");
+ ratelimit = now + 15*HZ;
+ }
+ }
+@@ -600,7 +599,6 @@ gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
+ struct rpc_pipe *pipe;
+ struct rpc_cred *cred = &gss_cred->gc_base;
+ struct gss_upcall_msg *gss_msg;
+- unsigned long timeout;
+ DEFINE_WAIT(wait);
+ int err;
+
+@@ -608,17 +606,16 @@ gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
+ __func__, from_kuid(&init_user_ns, cred->cr_uid));
+ retry:
+ err = 0;
+- /* Default timeout is 15s unless we know that gssd is not running */
+- timeout = 15 * HZ;
+- if (!sn->gssd_running)
+- timeout = HZ >> 2;
++ /* if gssd is down, just skip upcalling altogether */
++ if (!gssd_running(net)) {
++ warn_gssd();
++ return -EACCES;
++ }
+ gss_msg = gss_setup_upcall(gss_auth, cred);
+ if (PTR_ERR(gss_msg) == -EAGAIN) {
+ err = wait_event_interruptible_timeout(pipe_version_waitqueue,
+- sn->pipe_version >= 0, timeout);
++ sn->pipe_version >= 0, 15 * HZ);
+ if (sn->pipe_version < 0) {
+- if (err == 0)
+- sn->gssd_running = 0;
+ warn_gssd();
+ err = -EACCES;
+ }
+diff --git a/net/sunrpc/netns.h b/net/sunrpc/netns.h
+index 8a8e841..94e506f 100644
+--- a/net/sunrpc/netns.h
++++ b/net/sunrpc/netns.h
+@@ -33,8 +33,6 @@ struct sunrpc_net {
+ int pipe_version;
+ atomic_t pipe_users;
+ struct proc_dir_entry *use_gssp_proc;
+-
+- unsigned int gssd_running;
+ };
+
+ extern int sunrpc_net_id;
+diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
+index c23458b..5cd7ad1 100644
+--- a/net/sunrpc/rpc_pipe.c
++++ b/net/sunrpc/rpc_pipe.c
+@@ -216,14 +216,11 @@ rpc_destroy_inode(struct inode *inode)
+ static int
+ rpc_pipe_open(struct inode *inode, struct file *filp)
+ {
+- struct net *net = inode->i_sb->s_fs_info;
+- struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
+ struct rpc_pipe *pipe;
+ int first_open;
+ int res = -ENXIO;
+
+ mutex_lock(&inode->i_mutex);
+- sn->gssd_running = 1;
+ pipe = RPC_I(inode)->pipe;
+ if (pipe == NULL)
+ goto out;
+@@ -1222,7 +1219,6 @@ int rpc_pipefs_init_net(struct net *net)
+ return PTR_ERR(sn->gssd_dummy);
+
+ mutex_init(&sn->pipefs_sb_lock);
+- sn->gssd_running = 1;
+ sn->pipe_version = -1;
+ return 0;
+ }
+@@ -1376,6 +1372,16 @@ err_depopulate:
+ return err;
+ }
+
++bool
++gssd_running(struct net *net)
++{
++ struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
++ struct rpc_pipe *pipe = sn->gssd_dummy;
++
++ return pipe->nreaders || pipe->nwriters;
++}
++EXPORT_SYMBOL_GPL(gssd_running);
++
+ static struct dentry *
+ rpc_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
+--
+1.8.5.3
+