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authorSage Weil <sage@newdream.net>2009-10-06 20:31:14 +0200
committerSage Weil <sage@newdream.net>2009-10-06 20:31:14 +0200
commit8f4e91dee2a245e4be6942f4a8d83a769e13a47d (patch)
tree6bbb4ea1a42186a0d371dd5c1a1fd03e55f39dbf /fs/ceph/ioctl.h
parentceph: nfs re-export support (diff)
downloadlinux-8f4e91dee2a245e4be6942f4a8d83a769e13a47d.tar.xz
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ceph: ioctls
A few Ceph ioctls for getting and setting file layout (striping) parameters, and learning the identity and network address of the OSD a given region of a file is stored on. Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/ioctl.h')
-rw-r--r--fs/ceph/ioctl.h39
1 files changed, 39 insertions, 0 deletions
diff --git a/fs/ceph/ioctl.h b/fs/ceph/ioctl.h
new file mode 100644
index 000000000000..3c511dab3730
--- /dev/null
+++ b/fs/ceph/ioctl.h
@@ -0,0 +1,39 @@
+#ifndef FS_CEPH_IOCTL_H
+#define FS_CEPH_IOCTL_H
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+#define CEPH_IOCTL_MAGIC 0x97
+
+/* just use u64 to align sanely on all archs */
+struct ceph_ioctl_layout {
+ __u64 stripe_unit, stripe_count, object_size;
+ __u64 data_pool;
+};
+
+#define CEPH_IOC_GET_LAYOUT _IOR(CEPH_IOCTL_MAGIC, 1, \
+ struct ceph_ioctl_layout)
+#define CEPH_IOC_SET_LAYOUT _IOW(CEPH_IOCTL_MAGIC, 2, \
+ struct ceph_ioctl_layout)
+
+/*
+ * Extract identity, address of the OSD and object storing a given
+ * file offset.
+ */
+struct ceph_ioctl_dataloc {
+ __u64 file_offset; /* in+out: file offset */
+ __u64 object_offset; /* out: offset in object */
+ __u64 object_no; /* out: object # */
+ __u64 object_size; /* out: object size */
+ char object_name[64]; /* out: object name */
+ __u64 block_offset; /* out: offset in block */
+ __u64 block_size; /* out: block length */
+ __s64 osd; /* out: osd # */
+ struct sockaddr_storage osd_addr; /* out: osd address */
+};
+
+#define CEPH_IOC_GET_DATALOC _IOWR(CEPH_IOCTL_MAGIC, 3, \
+ struct ceph_ioctl_dataloc)
+
+#endif