1/****************************************************************************
2 ****************************************************************************
3 ***
4 ***   This header was automatically generated from a Linux kernel header
5 ***   of the same name, to make information necessary for userspace to
6 ***   call into the kernel available to libc.  It contains only constants,
7 ***   structures, and macros generated from the original header, and thus,
8 ***   contains no copyrightable information.
9 ***
10 ***   To edit the content of this header, modify the corresponding
11 ***   source file (e.g. under external/kernel-headers/original/) then
12 ***   run bionic/libc/kernel/tools/update_all.py
13 ***
14 ***   Any manual change here will be lost the next time this script will
15 ***   be run. You've been warned!
16 ***
17 ****************************************************************************
18 ****************************************************************************/
19#ifndef _LINUX_BCACHE_H
20#define _LINUX_BCACHE_H
21#include <linux/types.h>
22#define BITMASK(name,type,field,offset,size) static inline __u64 name(const type * k) \
23{ return(k->field >> offset) & ~(~0ULL << size); } static inline void SET_ ##name(type * k, __u64 v) \
24{ k->field &= ~(~(~0ULL << size) << offset); k->field |= (v & ~(~0ULL << size)) << offset; \
25}
26struct bkey {
27  __u64 high;
28  __u64 low;
29  __u64 ptr[];
30};
31#define KEY_FIELD(name,field,offset,size) BITMASK(name, struct bkey, field, offset, size)
32#define PTR_FIELD(name,offset,size) static inline __u64 name(const struct bkey * k, unsigned i) \
33{ return(k->ptr[i] >> offset) & ~(~0ULL << size); } static inline void SET_ ##name(struct bkey * k, unsigned i, __u64 v) \
34{ k->ptr[i] &= ~(~(~0ULL << size) << offset); k->ptr[i] |= (v & ~(~0ULL << size)) << offset; \
35}
36#define KEY_SIZE_BITS 16
37#define KEY_MAX_U64S 8
38#define KEY(inode,offset,size) \
39((struct bkey) {.high = (1ULL << 63) | ((__u64) (size) << 20) | (inode),.low = (offset) \
40})
41#define ZERO_KEY KEY(0, 0, 0)
42#define MAX_KEY_INODE (~(~0 << 20))
43#define MAX_KEY_OFFSET (~0ULL >> 1)
44#define MAX_KEY KEY(MAX_KEY_INODE, MAX_KEY_OFFSET, 0)
45#define KEY_START(k) (KEY_OFFSET(k) - KEY_SIZE(k))
46#define START_KEY(k) KEY(KEY_INODE(k), KEY_START(k), 0)
47#define PTR_DEV_BITS 12
48#define PTR_CHECK_DEV ((1 << PTR_DEV_BITS) - 1)
49#define MAKE_PTR(gen,offset,dev) ((((__u64) dev) << 51) | ((__u64) offset) << 8 | gen)
50#define bkey_copy(_dest,_src) memcpy(_dest, _src, bkey_bytes(_src))
51#define BKEY_PAD 8
52#define BKEY_PADDED(key) union { struct bkey key; __u64 key ##_pad[BKEY_PAD]; }
53#define BCACHE_SB_VERSION_CDEV 0
54#define BCACHE_SB_VERSION_BDEV 1
55#define BCACHE_SB_VERSION_CDEV_WITH_UUID 3
56#define BCACHE_SB_VERSION_BDEV_WITH_OFFSET 4
57#define BCACHE_SB_MAX_VERSION 4
58#define SB_SECTOR 8
59#define SB_SIZE 4096
60#define SB_LABEL_SIZE 32
61#define SB_JOURNAL_BUCKETS 256U
62#define MAX_CACHES_PER_SET 8
63#define BDEV_DATA_START_DEFAULT 16
64struct cache_sb {
65  __u64 csum;
66  __u64 offset;
67  __u64 version;
68  __u8 magic[16];
69  __u8 uuid[16];
70  union {
71    __u8 set_uuid[16];
72    __u64 set_magic;
73  };
74  __u8 label[SB_LABEL_SIZE];
75  __u64 flags;
76  __u64 seq;
77  __u64 pad[8];
78  union {
79    struct {
80      __u64 nbuckets;
81      __u16 block_size;
82      __u16 bucket_size;
83      __u16 nr_in_set;
84      __u16 nr_this_dev;
85    };
86    struct {
87      __u64 data_offset;
88    };
89  };
90  __u32 last_mount;
91  __u16 first_bucket;
92  union {
93    __u16 njournal_buckets;
94    __u16 keys;
95  };
96  __u64 d[SB_JOURNAL_BUCKETS];
97};
98#define CACHE_REPLACEMENT_LRU 0U
99#define CACHE_REPLACEMENT_FIFO 1U
100#define CACHE_REPLACEMENT_RANDOM 2U
101#define CACHE_MODE_WRITETHROUGH 0U
102#define CACHE_MODE_WRITEBACK 1U
103#define CACHE_MODE_WRITEAROUND 2U
104#define CACHE_MODE_NONE 3U
105#define BDEV_STATE_NONE 0U
106#define BDEV_STATE_CLEAN 1U
107#define BDEV_STATE_DIRTY 2U
108#define BDEV_STATE_STALE 3U
109#define JSET_MAGIC 0x245235c1a3625032ULL
110#define PSET_MAGIC 0x6750e15f87337f91ULL
111#define BSET_MAGIC 0x90135c78b99e07f5ULL
112#define BCACHE_JSET_VERSION_UUIDv1 1
113#define BCACHE_JSET_VERSION_UUID 1
114#define BCACHE_JSET_VERSION 1
115struct jset {
116  __u64 csum;
117  __u64 magic;
118  __u64 seq;
119  __u32 version;
120  __u32 keys;
121  __u64 last_seq;
122  BKEY_PADDED(uuid_bucket);
123  BKEY_PADDED(btree_root);
124  __u16 btree_level;
125  __u16 pad[3];
126  __u64 prio_bucket[MAX_CACHES_PER_SET];
127  union {
128    struct bkey start[0];
129    __u64 d[0];
130  };
131};
132struct prio_set {
133  __u64 csum;
134  __u64 magic;
135  __u64 seq;
136  __u32 version;
137  __u32 pad;
138  __u64 next_bucket;
139  struct bucket_disk {
140    __u16 prio;
141    __u8 gen;
142  } __attribute((packed)) data[];
143};
144struct uuid_entry {
145  union {
146    struct {
147      __u8 uuid[16];
148      __u8 label[32];
149      __u32 first_reg;
150      __u32 last_reg;
151      __u32 invalidated;
152      __u32 flags;
153      __u64 sectors;
154    };
155    __u8 pad[128];
156  };
157};
158#define BCACHE_BSET_CSUM 1
159#define BCACHE_BSET_VERSION 1
160struct bset {
161  __u64 csum;
162  __u64 magic;
163  __u64 seq;
164  __u32 version;
165  __u32 keys;
166  union {
167    struct bkey start[0];
168    __u64 d[0];
169  };
170};
171struct uuid_entry_v0 {
172  __u8 uuid[16];
173  __u8 label[32];
174  __u32 first_reg;
175  __u32 last_reg;
176  __u32 invalidated;
177  __u32 pad;
178};
179#endif
180