1 files changed, 58 insertions, 0 deletions

diff --git a/include/uapi/linux/raid/md_p.h b/include/uapi/linux/raid/md_p.h
index a5f54ff26c20..96e4196f9c79 100644
--- a/include/uapi/linux/raid/md_p.h
+++ b/include/uapi/linux/raid/md_p.h
@@ -324,4 +324,62 @@ struct mdp_superblock_1 {
                                         |MD_FEATURE_CLUSTERED           \
                                         )
 
+struct r5l_payload_header {
+        __le16 type;
+        __le16 flags;
+} __attribute__ ((__packed__));
+
+enum r5l_payload_type {
+        R5LOG_PAYLOAD_DATA = 0,
+        R5LOG_PAYLOAD_PARITY = 1,
+        R5LOG_PAYLOAD_FLUSH = 2,
+};
+
+struct r5l_payload_data_parity {
+        struct r5l_payload_header header;
+        __le32 size;            /* sector. data/parity size. each 4k
+                                 * has a checksum */
+        __le64 location;        /* sector. For data, it's raid sector. For
+                                 * parity, it's stripe sector */
+        __le32 checksum[];
+} __attribute__ ((__packed__));
+
+enum r5l_payload_data_parity_flag {
+        R5LOG_PAYLOAD_FLAG_DISCARD = 1, /* payload is discard */
+        /*
+         * RESHAPED/RESHAPING is only set when there is reshape activity. Note,
+         * both data/parity of a stripe should have the same flag set
+         *
+         * RESHAPED: reshape is running, and this stripe finished reshape
+         * RESHAPING: reshape is running, and this stripe isn't reshaped
+         */
+        R5LOG_PAYLOAD_FLAG_RESHAPED = 2,
+        R5LOG_PAYLOAD_FLAG_RESHAPING = 3,
+};
+
+struct r5l_payload_flush {
+        struct r5l_payload_header header;
+        __le32 size; /* flush_stripes size, bytes */
+        __le64 flush_stripes[];
+} __attribute__ ((__packed__));
+
+enum r5l_payload_flush_flag {
+        R5LOG_PAYLOAD_FLAG_FLUSH_STRIPE = 1, /* data represents whole stripe */
+};
+
+struct r5l_meta_block {
+        __le32 magic;
+        __le32 checksum;
+        __u8 version;
+        __u8 __zero_pading_1;
+        __le16 __zero_pading_2;
+        __le32 meta_size; /* whole size of the block */
+
+        __le64 seq;
+        __le64 position; /* sector, start from rdev->data_offset, current position */
+        struct r5l_payload_header payloads[];
+} __attribute__ ((__packed__));
+
+#define R5LOG_VERSION 0x1
+#define R5LOG_MAGIC 0x6433c509
 #endif