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-rw-r--r--kernels/linux-libre-rt/sunrpc-add-an-info-file-for-the-dummy-gssd-pipe.patch96
1 files changed, 96 insertions, 0 deletions
diff --git a/kernels/linux-libre-rt/sunrpc-add-an-info-file-for-the-dummy-gssd-pipe.patch b/kernels/linux-libre-rt/sunrpc-add-an-info-file-for-the-dummy-gssd-pipe.patch
new file mode 100644
index 000000000..dd3b5ba2f
--- /dev/null
+++ b/kernels/linux-libre-rt/sunrpc-add-an-info-file-for-the-dummy-gssd-pipe.patch
@@ -0,0 +1,96 @@
+Bugzilla: 1037793
+Upstream-status: submitted for 3.14
+
+rpc.gssd expects to see an "info" file in each clntXX dir. Since adding
+the dummy gssd pipe, users that run rpc.gssd see a lot of these messages
+spamming the logs:
+
+ rpc.gssd[508]: ERROR: can't open /var/lib/nfs/rpc_pipefs/gssd/clntXX/info: No such file or directory
+ rpc.gssd[508]: ERROR: failed to read service info
+
+Add a dummy gssd/clntXX/info file to help silence these messages.
+
+Signed-off-by: Jeff Layton <jlayton@redhat.com>
+---
+ net/sunrpc/rpc_pipe.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++++-
+ 1 file changed, 49 insertions(+), 1 deletion(-)
+
+diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
+index 0b74c61..5d973b2 100644
+--- a/net/sunrpc/rpc_pipe.c
++++ b/net/sunrpc/rpc_pipe.c
+@@ -17,6 +17,7 @@
+ #include <linux/fsnotify.h>
+ #include <linux/kernel.h>
+ #include <linux/rcupdate.h>
++#include <linux/utsname.h>
+
+ #include <asm/ioctls.h>
+ #include <linux/poll.h>
+@@ -1275,6 +1276,44 @@ static const struct rpc_pipe_ops gssd_dummy_pipe_ops = {
+ .downcall = dummy_downcall,
+ };
+
++/*
++ * Here we present a bogus "info" file to keep rpc.gssd happy. We don't expect
++ * that it will ever use this info to handle an upcall, but rpc.gssd expects
++ * that this file will be there and have a certain format.
++ */
++static int
++rpc_show_dummy_info(struct seq_file *m, void *v)
++{
++ seq_printf(m, "RPC server: %s\n", utsname()->nodename);
++ seq_printf(m, "service: foo (1) version 0\n");
++ seq_printf(m, "address: 127.0.0.1\n");
++ seq_printf(m, "protocol: tcp\n");
++ seq_printf(m, "port: 0\n");
++ return 0;
++}
++
++static int
++rpc_dummy_info_open(struct inode *inode, struct file *file)
++{
++ return single_open(file, rpc_show_dummy_info, NULL);
++}
++
++static const struct file_operations rpc_dummy_info_operations = {
++ .owner = THIS_MODULE,
++ .open = rpc_dummy_info_open,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++
++static const struct rpc_filelist gssd_dummy_info_file[] = {
++ [0] = {
++ .name = "info",
++ .i_fop = &rpc_dummy_info_operations,
++ .mode = S_IFREG | S_IRUSR,
++ },
++};
++
+ /**
+ * rpc_gssd_dummy_populate - create a dummy gssd pipe
+ * @root: root of the rpc_pipefs filesystem
+@@ -1312,9 +1351,18 @@ rpc_gssd_dummy_populate(struct dentry *root, struct rpc_pipe *pipe_data)
+ goto out;
+ }
+
++ ret = rpc_populate(clnt_dentry, gssd_dummy_info_file, 0, 1, NULL);
++ if (ret) {
++ __rpc_depopulate(gssd_dentry, gssd_dummy_clnt_dir, 0, 1);
++ pipe_dentry = ERR_PTR(ret);
++ goto out;
++ }
++
+ pipe_dentry = rpc_mkpipe_dentry(clnt_dentry, "gssd", NULL, pipe_data);
+- if (IS_ERR(pipe_dentry))
++ if (IS_ERR(pipe_dentry)) {
++ __rpc_depopulate(clnt_dentry, gssd_dummy_info_file, 0, 1);
+ __rpc_depopulate(gssd_dentry, gssd_dummy_clnt_dir, 0, 1);
++ }
+ out:
+ dput(clnt_dentry);
+ dput(gssd_dentry);
+--
+1.8.4.2