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