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 } 26 struct 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 int i) \ 33 { return(k->ptr[i] >> offset) & ~(~0ULL << size); } static inline void SET_ ##name(struct bkey * k, unsigned int 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_VERSION_CDEV_WITH_FEATURES 5 58 #define BCACHE_SB_VERSION_BDEV_WITH_FEATURES 6 59 #define BCACHE_SB_MAX_VERSION 6 60 #define SB_SECTOR 8 61 #define SB_OFFSET (SB_SECTOR << SECTOR_SHIFT) 62 #define SB_SIZE 4096 63 #define SB_LABEL_SIZE 32 64 #define SB_JOURNAL_BUCKETS 256U 65 #define MAX_CACHES_PER_SET 8 66 #define BDEV_DATA_START_DEFAULT 16 67 struct cache_sb_disk { 68 __le64 csum; 69 __le64 offset; 70 __le64 version; 71 __u8 magic[16]; 72 __u8 uuid[16]; 73 union { 74 __u8 set_uuid[16]; 75 __le64 set_magic; 76 }; 77 __u8 label[SB_LABEL_SIZE]; 78 __le64 flags; 79 __le64 seq; 80 __le64 feature_compat; 81 __le64 feature_incompat; 82 __le64 feature_ro_compat; 83 __le64 pad[5]; 84 union { 85 struct { 86 __le64 nbuckets; 87 __le16 block_size; 88 __le16 bucket_size; 89 __le16 nr_in_set; 90 __le16 nr_this_dev; 91 }; 92 struct { 93 __le64 data_offset; 94 }; 95 }; 96 __le32 last_mount; 97 __le16 first_bucket; 98 union { 99 __le16 njournal_buckets; 100 __le16 keys; 101 }; 102 __le64 d[SB_JOURNAL_BUCKETS]; 103 __le16 obso_bucket_size_hi; 104 }; 105 struct cache_sb { 106 __u64 offset; 107 __u64 version; 108 __u8 magic[16]; 109 __u8 uuid[16]; 110 union { 111 __u8 set_uuid[16]; 112 __u64 set_magic; 113 }; 114 __u8 label[SB_LABEL_SIZE]; 115 __u64 flags; 116 __u64 seq; 117 __u64 feature_compat; 118 __u64 feature_incompat; 119 __u64 feature_ro_compat; 120 union { 121 struct { 122 __u64 nbuckets; 123 __u16 block_size; 124 __u16 nr_in_set; 125 __u16 nr_this_dev; 126 __u32 bucket_size; 127 }; 128 struct { 129 __u64 data_offset; 130 }; 131 }; 132 __u32 last_mount; 133 __u16 first_bucket; 134 union { 135 __u16 njournal_buckets; 136 __u16 keys; 137 }; 138 __u64 d[SB_JOURNAL_BUCKETS]; 139 }; 140 #define CACHE_REPLACEMENT_LRU 0U 141 #define CACHE_REPLACEMENT_FIFO 1U 142 #define CACHE_REPLACEMENT_RANDOM 2U 143 #define CACHE_MODE_WRITETHROUGH 0U 144 #define CACHE_MODE_WRITEBACK 1U 145 #define CACHE_MODE_WRITEAROUND 2U 146 #define CACHE_MODE_NONE 3U 147 #define BDEV_STATE_NONE 0U 148 #define BDEV_STATE_CLEAN 1U 149 #define BDEV_STATE_DIRTY 2U 150 #define BDEV_STATE_STALE 3U 151 #define JSET_MAGIC 0x245235c1a3625032ULL 152 #define PSET_MAGIC 0x6750e15f87337f91ULL 153 #define BSET_MAGIC 0x90135c78b99e07f5ULL 154 #define BCACHE_JSET_VERSION_UUIDv1 1 155 #define BCACHE_JSET_VERSION_UUID 1 156 #define BCACHE_JSET_VERSION 1 157 struct jset { 158 __u64 csum; 159 __u64 magic; 160 __u64 seq; 161 __u32 version; 162 __u32 keys; 163 __u64 last_seq; 164 BKEY_PADDED(uuid_bucket); 165 BKEY_PADDED(btree_root); 166 __u16 btree_level; 167 __u16 pad[3]; 168 __u64 prio_bucket[MAX_CACHES_PER_SET]; 169 union { 170 struct bkey start[0]; 171 __u64 d[0]; 172 }; 173 }; 174 struct prio_set { 175 __u64 csum; 176 __u64 magic; 177 __u64 seq; 178 __u32 version; 179 __u32 pad; 180 __u64 next_bucket; 181 struct bucket_disk { 182 __u16 prio; 183 __u8 gen; 184 } __attribute((packed)) data[]; 185 }; 186 struct uuid_entry { 187 union { 188 struct { 189 __u8 uuid[16]; 190 __u8 label[32]; 191 __u32 first_reg; 192 __u32 last_reg; 193 __u32 invalidated; 194 __u32 flags; 195 __u64 sectors; 196 }; 197 __u8 pad[128]; 198 }; 199 }; 200 #define BCACHE_BSET_CSUM 1 201 #define BCACHE_BSET_VERSION 1 202 struct bset { 203 __u64 csum; 204 __u64 magic; 205 __u64 seq; 206 __u32 version; 207 __u32 keys; 208 union { 209 struct bkey start[0]; 210 __u64 d[0]; 211 }; 212 }; 213 struct uuid_entry_v0 { 214 __u8 uuid[16]; 215 __u8 label[32]; 216 __u32 first_reg; 217 __u32 last_reg; 218 __u32 invalidated; 219 __u32 pad; 220 }; 221 #endif 222