From 4cb4089d43bc9e18a3a95af56af6115e9788a270 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Thu, 14 Aug 2008 19:24:04 -0700
Subject: [PATCH] kclient: beginnings of layout ioctls

---
 src/kernel/file.c  | 39 ++++++++++++++++++++++++++++++++++++++-
 src/kernel/ioctl.h | 12 ++++++++++++
 2 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 src/kernel/ioctl.h

diff --git a/src/kernel/file.c b/src/kernel/file.c
index 6903aa3501e3a..0880e70cc8a5b 100644
--- a/src/kernel/file.c
+++ b/src/kernel/file.c
@@ -8,6 +8,7 @@ int ceph_debug_file = -1;
 #include "super.h"
 
 #include "mds_client.h"
+#include "ioctl.h"
 
 #include <linux/namei.h>
 
@@ -382,9 +383,45 @@ static int ceph_fsync(struct file *file, struct dentry *dentry, int datasync)
 	return 0;
 }
 
+
+/*
+ * ioctls
+ */
+
+static long ceph_ioctl_get_layout(struct file *file, void __user *arg)
+{
+	struct ceph_inode_info *ci = ceph_inode(file->f_dentry->d_inode);
+
+	if (copy_to_user(arg, &ci->i_layout, sizeof(ci->i_layout)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
+{
+	struct inode *inode = file->f_dentry->d_inode;
+	struct ceph_file_layout l;
+
+	if (copy_from_user(&l, arg, sizeof(l)))
+		return -EFAULT;
+
+	/* validate */
+	/* ... */
+
+	return 0;
+}
+
 static long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-	return -EINVAL;
+	switch (cmd) {
+	case CEPH_IOC_GET_LAYOUT:
+		return ceph_ioctl_get_layout(file, (void __user *)arg);
+
+	case CEPH_IOC_SET_LAYOUT:
+		return ceph_ioctl_set_layout(file, (void __user *)arg);
+	}
+	return -ENOTTY;
 }
 
 const struct file_operations ceph_file_fops = {
diff --git a/src/kernel/ioctl.h b/src/kernel/ioctl.h
new file mode 100644
index 0000000000000..3420a8cdeb8ae
--- /dev/null
+++ b/src/kernel/ioctl.h
@@ -0,0 +1,12 @@
+#ifndef FS_CEPH_IOCTL_H
+#define FS_CEPH_IOCTL_H
+
+#include <linux/ioctl.h>
+#include "ceph_fs.h"
+
+#define CEPH_IOCTL_MAGIC 0x97
+
+#define CEPH_IOC_GET_LAYOUT _IOR(CEPH_IOCTL_MAGIC, 1, struct ceph_file_layout)
+#define CEPH_IOC_SET_LAYOUT _IOW(CEPH_IOCTL_MAGIC, 2, struct ceph_file_layout)
+
+#endif
-- 
2.39.5