The "failed" debugfs entry can be used to get or set the failed status
of a nfs_client.
Signed-off-by: Joshua Watt <JPEWhacker@xxxxxxxxx>
---
fs/nfs/debugfs.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/fs/nfs/debugfs.c b/fs/nfs/debugfs.c
index 0195431427c2..7ccf04847660 100644
--- a/fs/nfs/debugfs.c
+++ b/fs/nfs/debugfs.c
@@ -80,6 +80,56 @@ nfs_server_debugfs_unregister(struct nfs_server *server)
server->debugfs = NULL;
}
+static int
+client_failed_show(struct seq_file *f, void *private)
+{
+ struct nfs_client *client = f->private;
+
+ seq_printf(f, "%c", client->cl_failed ? 'Y' : 'N');
+ return 0;
+}
+
+static ssize_t
+client_failed_write(struct file *file, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct seq_file *seq = file->private_data;
+ struct nfs_client *client = seq->private;
+ char buf[32];
+ size_t buf_size;
+ bool failed;
+ int err;
+
+ buf_size = min(count, sizeof(buf) - 1);
+ if (copy_from_user(buf, user_buf, buf_size))
+ return -EFAULT;
+
+ buf[buf_size] = '\0';
+
+ err = strtobool(buf, &failed);
+ if (err)
+ return err;
+
+ nfs_client_failed(client, failed);
+
+ return count;
+}
+
+static int
+client_failed_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, client_failed_show, inode->i_private);
+}
+
+static const struct file_operations client_failed_fops = {
+ .owner = THIS_MODULE,
+ .open = client_failed_open,
+ .read = seq_read,
+ .write = client_failed_write,
+ .llseek = seq_lseek,
+ .release = single_release
+};
+
void
nfs_client_debugfs_register(struct nfs_client *client)
{
@@ -99,6 +149,15 @@ nfs_client_debugfs_register(struct nfs_client *client)
link_rpc_client("rpc_client", client->cl_rpcclient,
client->cl_debugfs);
+
+ if (!debugfs_create_file("failed", 0600, client->cl_debugfs, client,
+ &client_failed_fops))
+ goto out_error;
+
+ return;
+out_error:
+ debugfs_remove_recursive(client->cl_debugfs);
+ client->cl_debugfs = NULL;
}
void
--
2.13.6
--
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