fs: dlm: add debugfs rawmsg send functionality

[linux-2.6-microblaze.git] / fs / dlm / debug_fs.c

diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 47e9d57..555904e 100644 (file)
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -768,6 +768,42 @@ static int dlm_version_show(struct seq_file *file, void *offset)
 }
 DEFINE_SHOW_ATTRIBUTE(dlm_version);
 
+static ssize_t dlm_rawmsg_write(struct file *fp, const char __user *user_buf,
+                               size_t count, loff_t *ppos)
+{
+       void *buf;
+       int ret;
+
+       if (count > PAGE_SIZE || count < sizeof(struct dlm_header))
+               return -EINVAL;
+
+       buf = kmalloc(PAGE_SIZE, GFP_NOFS);
+       if (!buf)
+               return -ENOMEM;
+
+       if (copy_from_user(buf, user_buf, count)) {
+               ret = -EFAULT;
+               goto out;
+       }
+
+       ret = dlm_midcomms_rawmsg_send(fp->private_data, buf, count);
+       if (ret)
+               goto out;
+
+       kfree(buf);
+       return count;
+
+out:
+       kfree(buf);
+       return ret;
+}
+
+static const struct file_operations dlm_rawmsg_fops = {
+       .open   = simple_open,
+       .write  = dlm_rawmsg_write,
+       .llseek = no_llseek,
+};
+
 void *dlm_create_debug_comms_file(int nodeid, void *data)
 {
        struct dentry *d_node;
@@ -782,6 +818,7 @@ void *dlm_create_debug_comms_file(int nodeid, void *data)
        debugfs_create_file("send_queue_count", 0444, d_node, data,
                            &dlm_send_queue_cnt_fops);
        debugfs_create_file("version", 0444, d_node, data, &dlm_version_fops);
+       debugfs_create_file("rawmsg", 0200, d_node, data, &dlm_rawmsg_fops);
 
        return d_node;
 }