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_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 64 struct 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 1 115 struct 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 }; 132 struct 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 }; 144 struct 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 1 160 struct 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 }; 171 struct 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
