1 files changed, 46 insertions, 4 deletions
diff --git a/libc/kernel/uapi/linux/bcache.h b/libc/kernel/uapi/linux/bcache.h
index 1bee0a30a..25b69875b 100644
--- a/libc/kernel/uapi/linux/bcache.h
+++ b/libc/kernel/uapi/linux/bcache.h
@@ -54,15 +54,55 @@ struct bkey {
 #define BCACHE_SB_VERSION_BDEV 1
 #define BCACHE_SB_VERSION_CDEV_WITH_UUID 3
 #define BCACHE_SB_VERSION_BDEV_WITH_OFFSET 4
-#define BCACHE_SB_MAX_VERSION 4
+#define BCACHE_SB_VERSION_CDEV_WITH_FEATURES 5
+#define BCACHE_SB_VERSION_BDEV_WITH_FEATURES 6
+#define BCACHE_SB_MAX_VERSION 6
 #define SB_SECTOR 8
+#define SB_OFFSET (SB_SECTOR << SECTOR_SHIFT)
 #define SB_SIZE 4096
 #define SB_LABEL_SIZE 32
 #define SB_JOURNAL_BUCKETS 256U
 #define MAX_CACHES_PER_SET 8
 #define BDEV_DATA_START_DEFAULT 16
+struct cache_sb_disk {
+  __le64 csum;
+  __le64 offset;
+  __le64 version;
+  __u8 magic[16];
+  __u8 uuid[16];
+  union {
+    __u8 set_uuid[16];
+    __le64 set_magic;
+  };
+  __u8 label[SB_LABEL_SIZE];
+  __le64 flags;
+  __le64 seq;
+  __le64 feature_compat;
+  __le64 feature_incompat;
+  __le64 feature_ro_compat;
+  __le64 pad[5];
+  union {
+    struct {
+      __le64 nbuckets;
+      __le16 block_size;
+      __le16 bucket_size;
+      __le16 nr_in_set;
+      __le16 nr_this_dev;
+    };
+    struct {
+      __le64 data_offset;
+    };
+  };
+  __le32 last_mount;
+  __le16 first_bucket;
+  union {
+    __le16 njournal_buckets;
+    __le16 keys;
+  };
+  __le64 d[SB_JOURNAL_BUCKETS];
+  __le16 obso_bucket_size_hi;
+};
 struct cache_sb {
-  __u64 csum;
   __u64 offset;
   __u64 version;
   __u8 magic[16];
@@ -74,14 +114,16 @@ struct cache_sb {
   __u8 label[SB_LABEL_SIZE];
   __u64 flags;
   __u64 seq;
-  __u64 pad[8];
+  __u64 feature_compat;
+  __u64 feature_incompat;
+  __u64 feature_ro_compat;
   union {
     struct {
       __u64 nbuckets;
       __u16 block_size;
-      __u16 bucket_size;
       __u16 nr_in_set;
       __u16 nr_this_dev;
+      __u32 bucket_size;
     };
     struct {
       __u64 data_offset;