[Ocfs2-tools-devel] [PATCH 03/11] Ocfs2-tools: Add ocfs2_ioctl.h kernel header to ocfs2-tools.

[Tristan Ye]

Since we're still discussing the possibility to move ioctls from  ocfs2_fs.h
to ioctl.h in kernel part, this patch only includes OCFS2_IOC_INFO related
structures and definitions, and keep ocfs2_fs.h the same as it was, which
therefore will not hurt any other existing codes currently.

However, in the long run, when such deal get fininshed in the kerne part,
we need to update corresponding parts other than o2info to use ocfs2_ioctl.h
instead.

Signed-off-by: Tristan Ye <tristan.ye at oracle.com>
---
 include/ocfs2-kernel/ocfs2_ioctl.h |  142 ++++++++++++++++++++++++++++++++++++
 1 files changed, 142 insertions(+), 0 deletions(-)
 create mode 100644 include/ocfs2-kernel/ocfs2_ioctl.h

diff --git a/include/ocfs2-kernel/ocfs2_ioctl.h b/include/ocfs2-kernel/ocfs2_ioctl.h
new file mode 100644
index 0000000..7ba1394
--- /dev/null
+++ b/include/ocfs2-kernel/ocfs2_ioctl.h
@@ -0,0 +1,142 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * ocfs2_ioctl.h
+ *
+ * Defines OCFS2 ioctls.
+ *
+ * Copyright (C) 2009 Oracle.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License, version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef OCFS2_IOCTL_H
+#define OCFS2_IOCTL_H
+
+/*
+ * ioctl commands
+ */
+
+/* Following definitions dedicated for ocfs2_info_request ioctls. */
+
+#define OCFS2_INFO_VOL_UUID_LEN		(16)
+#define OCFS2_INFO_MAX_VOL_LABEL_LEN	(64)
+#define OCFS2_INFO_VOL_UUIDSTR_LEN	(OCFS2_INFO_VOL_UUID_LEN * 2 + 1)
+#define OCFS2_INFO_MAX_SLOTS		(255)
+#define OCFS2_INFO_MAX_HIST		(32)
+
+#define OCFS2_INFO_MAX_REQUEST		(50)
+
+/* Magic number of all requests */
+#define OCFS2_INFO_MAGIC		(0x4F32494E)
+
+/*
+ * Always try to separate info request into small pieces to
+ * guarantee the backward&forward compatibility.
+ */
+
+struct ocfs2_info {
+	__u64 info_requests;	/* Array of __u64 pointers to requests */
+	__u32 info_count;	/* Number of requests in info_requests */
+};
+
+struct ocfs2_info_request {
+/*00*/	__u32 ir_magic;	/* Magic number */
+	__u32 ir_code;	/* Info request code */
+	__u32 ir_size;	/* Size of request */
+	__u32 ir_flags;	/* Request flags */
+/*10*/	/* Request specific fields */
+};
+
+struct ocfs2_info_clustersize {
+	struct ocfs2_info_request ir_request;
+	__u32 ir_clustersize;
+};
+
+struct ocfs2_info_blocksize {
+	struct ocfs2_info_request ir_request;
+	__u32 ir_blocksize;
+};
+
+struct ocfs2_info_slotnum {
+	struct ocfs2_info_request ir_request;
+	__u16 ir_slotnum;
+};
+
+struct ocfs2_info_label {
+	struct ocfs2_info_request ir_request;
+	__u8	ir_label[OCFS2_INFO_MAX_VOL_LABEL_LEN];
+};
+
+struct ocfs2_info_uuid {
+	struct ocfs2_info_request ir_request;
+	__u8	ir_uuid_str[OCFS2_INFO_VOL_UUIDSTR_LEN];
+};
+
+struct ocfs2_info_fs_features {
+	struct ocfs2_info_request ir_request;
+	__u32 ir_compat_features;
+	__u32 ir_incompat_features;
+	__u32 ir_ro_compat_features;
+};
+
+struct ocfs2_info_freefrag {
+	struct ocfs2_info_request ir_request;
+	__u32 ir_chunksize; /* chunksize in clusters(in) */
+	struct ocfs2_info_freefrag_stats { /* (out) */
+		__u32 ir_clusters;
+		__u32 ir_free_clusters;
+		__u32 ir_free_chunks;
+		__u32 ir_free_chunks_real;
+		__u32 ir_min; /* Minimum free chunksize in clusters */
+		__u32 ir_max;
+		__u32 ir_avg;
+		struct ocfs2_info_free_chunk_list {
+			__u32 ir_fc_chunks[OCFS2_INFO_MAX_HIST];
+			__u32 ir_fc_clusters[OCFS2_INFO_MAX_HIST];
+		} ir_fc_hist;
+	} ir_ffg;
+};
+
+struct ocfs2_info_freeinode {
+	struct ocfs2_info_request ir_request;
+	__u32 ir_slotnum; /* out */
+	struct ocfs2_info_local_fi {
+		__u64 ir_total;
+		__u64 ir_free;
+	} ir_fi_stat[OCFS2_INFO_MAX_SLOTS];
+};
+
+/* Codes for ocfs2_info_request */
+
+#define OCFS2_INFO_CLUSTERSIZE	(0x00000001)
+#define OCFS2_INFO_BLOCKSIZE	(0x00000002)
+#define OCFS2_INFO_SLOTNUM	(0x00000004)
+#define OCFS2_INFO_LABEL	(0x00000008)
+#define OCFS2_INFO_UUID		(0x00000010)
+#define OCFS2_INFO_FS_FEATURES	(0x00000020)
+#define OCFS2_INFO_FREEFRAG	(0x00000040)
+#define OCFS2_INFO_FREEINODE	(0x00000080)
+
+/* Flags for struct ocfs2_info_request */
+/* Filled by the caller */
+#define OCFS2_INFO_FL_NON_COHERENT	(0x00000001)	/* Cluster coherency not
+							   required. This is a hint.
+							   It is up to ocfs2 whether
+							   the request can be fulfilled
+							   without locking. */
+/* Filled by ocfs2 */
+#define OCFS2_INFO_FL_FILLED		(0x80000000)	/* Filesystem understood
+							   this request and
+							   filled in the answer */
+
+#define OCFS2_IOC_INFO		_IOR('o', 5, struct ocfs2_info)
+
+#endif /* OCFS2_IOCTL_H */
-- 
1.5.5