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Subject[PATCH 17/20] ceph: ioctls
Date
A few Ceph ioctls for getting and setting file layout (striping)
parameters.

Signed-off-by: Sage Weil <sage@newdream.net>
---
fs/ceph/ioctl.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/ceph/ioctl.h | 12 ++++++++++
2 files changed, 77 insertions(+), 0 deletions(-)
create mode 100644 fs/ceph/ioctl.c
create mode 100644 fs/ceph/ioctl.h
diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
new file mode 100644
index 0000000..69c65c1
--- /dev/null
+++ b/fs/ceph/ioctl.c
@@ -0,0 +1,65 @@
+#include "ioctl.h"
+#include "super.h"
+#include "ceph_debug.h"
+
+int ceph_debug_ioctl __read_mostly = -1;
+#define DOUT_MASK DOUT_MASK_IOCTL
+#define DOUT_VAR ceph_debug_ioctl
+
+
+/*
+ * 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);
+ int err;
+
+ err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT);
+ if (!err) {
+ if (copy_to_user(arg, &ci->i_layout, sizeof(ci->i_layout)))
+ return -EFAULT;
+ }
+
+ return err;
+}
+
+static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ struct inode *parent_inode = file->f_dentry->d_parent->d_inode;
+ struct ceph_mds_client *mdsc = &ceph_sb_to_client(inode->i_sb)->mdsc;
+ struct ceph_mds_request *req;
+ struct ceph_file_layout layout;
+ int err;
+
+ /* copy and validate */
+ if (copy_from_user(&layout, arg, sizeof(layout)))
+ return -EFAULT;
+
+ req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
+ USE_AUTH_MDS);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+ req->r_inode = igrab(inode);
+ req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
+ req->r_args.setlayout.layout = layout;
+
+ err = ceph_mdsc_do_request(mdsc, parent_inode, req);
+ ceph_mdsc_put_request(req);
+ return err;
+}
+
+long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ dout(10, "ioctl file %p cmd %u arg %lu\n", file, cmd, arg);
+ 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;
+}
diff --git a/fs/ceph/ioctl.h b/fs/ceph/ioctl.h
new file mode 100644
index 0000000..537c27b
--- /dev/null
+++ b/fs/ceph/ioctl.h
@@ -0,0 +1,12 @@
+#ifndef FS_CEPH_IOCTL_H
+#define FS_CEPH_IOCTL_H
+
+#include <linux/ioctl.h>
+#include "types.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
--
1.5.6.5


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