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Diffstat (limited to 'fs/ocfs2/ocfs2_ioctl.h')
-rw-r--r--fs/ocfs2/ocfs2_ioctl.h95
1 files changed, 95 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2_ioctl.h b/fs/ocfs2/ocfs2_ioctl.h
index 5d241505690b..b46f39bf7438 100644
--- a/fs/ocfs2/ocfs2_ioctl.h
+++ b/fs/ocfs2/ocfs2_ioctl.h
@@ -76,4 +76,99 @@ struct reflink_arguments {
};
#define OCFS2_IOC_REFLINK _IOW('o', 4, struct reflink_arguments)
+/* Following definitions dedicated for ocfs2_info_request ioctls. */
+#define OCFS2_INFO_MAX_REQUEST (50)
+#define OCFS2_TEXT_UUID_LEN (OCFS2_VOL_UUID_LEN * 2)
+
+/* 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 oi_requests; /* Array of __u64 pointers to requests */
+ __u32 oi_count; /* Number of requests in info_requests */
+ __u32 oi_pad;
+};
+
+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 ic_req;
+ __u32 ic_clustersize;
+ __u32 ic_pad;
+};
+
+struct ocfs2_info_blocksize {
+ struct ocfs2_info_request ib_req;
+ __u32 ib_blocksize;
+ __u32 ib_pad;
+};
+
+struct ocfs2_info_maxslots {
+ struct ocfs2_info_request im_req;
+ __u32 im_max_slots;
+ __u32 im_pad;
+};
+
+struct ocfs2_info_label {
+ struct ocfs2_info_request il_req;
+ __u8 il_label[OCFS2_MAX_VOL_LABEL_LEN];
+} __attribute__ ((packed));
+
+struct ocfs2_info_uuid {
+ struct ocfs2_info_request iu_req;
+ __u8 iu_uuid_str[OCFS2_TEXT_UUID_LEN + 1];
+} __attribute__ ((packed));
+
+struct ocfs2_info_fs_features {
+ struct ocfs2_info_request if_req;
+ __u32 if_compat_features;
+ __u32 if_incompat_features;
+ __u32 if_ro_compat_features;
+ __u32 if_pad;
+};
+
+struct ocfs2_info_journal_size {
+ struct ocfs2_info_request ij_req;
+ __u64 ij_journal_size;
+};
+
+/* Codes for ocfs2_info_request */
+enum ocfs2_info_type {
+ OCFS2_INFO_CLUSTERSIZE = 1,
+ OCFS2_INFO_BLOCKSIZE,
+ OCFS2_INFO_MAXSLOTS,
+ OCFS2_INFO_LABEL,
+ OCFS2_INFO_UUID,
+ OCFS2_INFO_FS_FEATURES,
+ OCFS2_INFO_JOURNAL_SIZE,
+ OCFS2_INFO_NUM_TYPES
+};
+
+/* 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 (0x40000000) /* Filesystem understood
+ this request and
+ filled in the answer */
+
+#define OCFS2_INFO_FL_ERROR (0x80000000) /* Error happened during
+ request handling. */
+
+#define OCFS2_IOC_INFO _IOR('o', 5, struct ocfs2_info)
+
#endif /* OCFS2_IOCTL_H */