diff options
| -rw-r--r-- | net/sunrpc/rpc_pipe.c | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index 0b74c61db7b4..5d973b25b5b0 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); |