Fix RAID metadata check

[thirdparty/mdadm.git] / md_p.h

diff --git a/md_p.h b/md_p.h
index 9b6b5f802359e5668a44e2e739006ae6dc394442..0d691fbc987dc3bd9a0845a8c63d7af40cd925c7 100644 (file)
--- a/md_p.h
+++ b/md_p.h
@@ -91,6 +91,12 @@
                                   */
 
 #define MD_DISK_REPLACEMENT    17
+#define MD_DISK_JOURNAL                18 /* disk is used as the write journal in RAID-5/6 */
+
+#define MD_DISK_ROLE_SPARE     0xffff
+#define MD_DISK_ROLE_FAULTY    0xfffe
+#define MD_DISK_ROLE_JOURNAL   0xfffd
+#define MD_DISK_ROLE_MAX       0xff00 /* max value of regular disk role */
 
 typedef struct mdp_device_descriptor_s {
        __u32 number;           /* 0 Device number in the entire set          */
@@ -202,4 +208,62 @@ static inline __u64 md_event(mdp_super_t *sb) {
        return (ev<<32)| sb->events_lo;
 }
 
+struct r5l_payload_header {
+       __u16 type;
+       __u16 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;
+       __u32 size; /* sector. data/parity size. each 4k has a checksum */
+       __u64 location; /* sector. For data, it's raid sector. For
+                               parity, it's stripe sector */
+       __u32 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;
+       __u32 size; /* flush_stripes size, bytes */
+       __u64 flush_stripes[];
+} __attribute__ ((__packed__));
+
+enum r5l_payload_flush_flag {
+       R5LOG_PAYLOAD_FLAG_FLUSH_STRIPE = 1, /* data represents whole stripe */
+};
+
+struct r5l_meta_block {
+       __u32 magic;
+       __u32 checksum;
+       __u8 version;
+       __u8 __zero_pading_1;
+       __u16 __zero_pading_2;
+       __u32 meta_size; /* whole size of the block */
+
+       __u64 seq;
+       __u64 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