[Ocfs2-tools-devel] [PATCH 04/19] Ocfs2-tools: Add all structures and commands OCFS2_IOC_INFO needed into ocfs2_ioctl.h

[Tristan Ye]

Signed-off-by: Tristan Ye <tristan.ye at oracle.com>
---
 include/ocfs2-kernel/ocfs2_ioctl.h |  117 ++++++++++++++++++++++++++++++++++++
 1 files changed, 117 insertions(+), 0 deletions(-)

diff --git a/include/ocfs2-kernel/ocfs2_ioctl.h b/include/ocfs2-kernel/ocfs2_ioctl.h
index 2d3420a..9cfe5be 100644
--- a/include/ocfs2-kernel/ocfs2_ioctl.h
+++ b/include/ocfs2-kernel/ocfs2_ioctl.h
@@ -76,4 +76,121 @@ struct reflink_arguments {
 };
 #define OCFS2_IOC_REFLINK	_IOW('o', 4, struct reflink_arguments)
 
+/* 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 */
+enum ocfs2_info_type {
+	OCFS2_INFO_CLUSTERSIZE = 1,
+	OCFS2_INFO_BLOCKSIZE,
+	OCFS2_INFO_SLOTNUM,
+	OCFS2_INFO_LABEL,
+	OCFS2_INFO_UUID,
+	OCFS2_INFO_FS_FEATURES,
+	OCFS2_INFO_FREEFRAG,
+	OCFS2_INFO_FREEINODE,
+	NUM_OCFS2_INFO_TYPE
+};
+
+/* 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