libc/kernel/uapi/linux/bcache.h

/****************************************************************************
 ****************************************************************************
 ***
 ***   This header was automatically generated from a Linux kernel header
 ***   of the same name, to make information necessary for userspace to
 ***   call into the kernel available to libc.  It contains only constants,
 ***   structures, and macros generated from the original header, and thus,
 ***   contains no copyrightable information.
 ***
 ***   To edit the content of this header, modify the corresponding
 ***   source file (e.g. under external/kernel-headers/original/) then
 ***   run bionic/libc/kernel/tools/update_all.py
 ***
 ***   Any manual change here will be lost the next time this script will
 ***   be run. You've been warned!
 ***
 ****************************************************************************
 ****************************************************************************/
#ifndef _LINUX_BCACHE_H
#define _LINUX_BCACHE_H
#include <linux/types.h>
#define BITMASK(name,type,field,offset,size) static inline __u64 name(const type * k) \
{ return(k->field >> offset) & ~(~0ULL << size); } static inline void SET_ ##name(type * k, __u64 v) \
{ k->field &= ~(~(~0ULL << size) << offset); k->field |= (v & ~(~0ULL << size)) << offset; \
}
struct bkey {
  __u64 high;
  __u64 low;
  __u64 ptr[];
};
#define KEY_FIELD(name,field,offset,size) BITMASK(name, struct bkey, field, offset, size)
#define PTR_FIELD(name,offset,size) static inline __u64 name(const struct bkey * k, unsigned int i) \
{ return(k->ptr[i] >> offset) & ~(~0ULL << size); } static inline void SET_ ##name(struct bkey * k, unsigned int i, __u64 v) \
{ k->ptr[i] &= ~(~(~0ULL << size) << offset); k->ptr[i] |= (v & ~(~0ULL << size)) << offset; \
}
#define KEY_SIZE_BITS 16
#define KEY_MAX_U64S 8
#define KEY(inode,offset,size) \
((struct bkey) {.high = (1ULL << 63) | ((__u64) (size) << 20) | (inode),.low = (offset) \
})
#define ZERO_KEY KEY(0, 0, 0)
#define MAX_KEY_INODE (~(~0 << 20))
#define MAX_KEY_OFFSET (~0ULL >> 1)
#define MAX_KEY KEY(MAX_KEY_INODE, MAX_KEY_OFFSET, 0)
#define KEY_START(k) (KEY_OFFSET(k) - KEY_SIZE(k))
#define START_KEY(k) KEY(KEY_INODE(k), KEY_START(k), 0)
#define PTR_DEV_BITS 12
#define PTR_CHECK_DEV ((1 << PTR_DEV_BITS) - 1)
#define MAKE_PTR(gen,offset,dev) ((((__u64) dev) << 51) | ((__u64) offset) << 8 | gen)
#define bkey_copy(_dest,_src) memcpy(_dest, _src, bkey_bytes(_src))
#define BKEY_PAD 8
#define BKEY_PADDED(key) union { struct bkey key; __u64 key ##_pad[BKEY_PAD]; }
#define BCACHE_SB_VERSION_CDEV 0
#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 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 pad[8];
  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];
};
struct cache_sb {
  __u64 csum;
  __u64 offset;
  __u64 version;
  __u8 magic[16];
  __u8 uuid[16];
  union {
    __u8 set_uuid[16];
    __u64 set_magic;
  };
  __u8 label[SB_LABEL_SIZE];
  __u64 flags;
  __u64 seq;
  __u64 pad[8];
  union {
    struct {
      __u64 nbuckets;
      __u16 block_size;
      __u16 bucket_size;
      __u16 nr_in_set;
      __u16 nr_this_dev;
    };
    struct {
      __u64 data_offset;
    };
  };
  __u32 last_mount;
  __u16 first_bucket;
  union {
    __u16 njournal_buckets;
    __u16 keys;
  };
  __u64 d[SB_JOURNAL_BUCKETS];
};
#define CACHE_REPLACEMENT_LRU 0U
#define CACHE_REPLACEMENT_FIFO 1U
#define CACHE_REPLACEMENT_RANDOM 2U
#define CACHE_MODE_WRITETHROUGH 0U
#define CACHE_MODE_WRITEBACK 1U
#define CACHE_MODE_WRITEAROUND 2U
#define CACHE_MODE_NONE 3U
#define BDEV_STATE_NONE 0U
#define BDEV_STATE_CLEAN 1U
#define BDEV_STATE_DIRTY 2U
#define BDEV_STATE_STALE 3U
#define JSET_MAGIC 0x245235c1a3625032ULL
#define PSET_MAGIC 0x6750e15f87337f91ULL
#define BSET_MAGIC 0x90135c78b99e07f5ULL
#define BCACHE_JSET_VERSION_UUIDv1 1
#define BCACHE_JSET_VERSION_UUID 1
#define BCACHE_JSET_VERSION 1
struct jset {
  __u64 csum;
  __u64 magic;
  __u64 seq;
  __u32 version;
  __u32 keys;
  __u64 last_seq;
  BKEY_PADDED(uuid_bucket);
  BKEY_PADDED(btree_root);
  __u16 btree_level;
  __u16 pad[3];
  __u64 prio_bucket[MAX_CACHES_PER_SET];
  union {
    struct bkey start[0];
    __u64 d[0];
  };
};
struct prio_set {
  __u64 csum;
  __u64 magic;
  __u64 seq;
  __u32 version;
  __u32 pad;
  __u64 next_bucket;
  struct bucket_disk {
    __u16 prio;
    __u8 gen;
  } __attribute((packed)) data[];
};
struct uuid_entry {
  union {
    struct {
      __u8 uuid[16];
      __u8 label[32];
      __u32 first_reg;
      __u32 last_reg;
      __u32 invalidated;
      __u32 flags;
      __u64 sectors;
    };
    __u8 pad[128];
  };
};
#define BCACHE_BSET_CSUM 1
#define BCACHE_BSET_VERSION 1
struct bset {
  __u64 csum;
  __u64 magic;
  __u64 seq;
  __u32 version;
  __u32 keys;
  union {
    struct bkey start[0];
    __u64 d[0];
  };
};
struct uuid_entry_v0 {
  __u8 uuid[16];
  __u8 label[32];
  __u32 first_reg;
  __u32 last_reg;
  __u32 invalidated;
  __u32 pad;
};
#endif