#include <asm/byteorder.h>
#include <linux/kernel.h>
#include <linux/uuid.h>
+#include "vstructs.h"
+
+#ifdef __KERNEL__
+typedef uuid_t __uuid_t;
+#endif
+
+#define BITMASK(name, type, field, offset, end) \
+static const __maybe_unused unsigned name##_OFFSET = offset; \
+static const __maybe_unused unsigned name##_BITS = (end - offset); \
+ \
+static inline __u64 name(const type *k) \
+{ \
+ return (k->field >> offset) & ~(~0ULL << (end - offset)); \
+} \
+ \
+static inline void SET_##name(type *k, __u64 v) \
+{ \
+ k->field &= ~(~(~0ULL << (end - offset)) << offset); \
+ k->field |= (v & ~(~0ULL << (end - offset))) << offset; \
+}
#define LE_BITMASK(_bits, name, type, field, offset, end) \
-static const unsigned name##_OFFSET = offset; \
-static const unsigned name##_BITS = (end - offset); \
-static const __u##_bits name##_MAX = (1ULL << (end - offset)) - 1; \
+static const __maybe_unused unsigned name##_OFFSET = offset; \
+static const __maybe_unused unsigned name##_BITS = (end - offset); \
+static const __maybe_unused __u##_bits name##_MAX = (1ULL << (end - offset)) - 1;\
\
static inline __u64 name(const type *k) \
{ \
#else
#error edit for your odd byteorder.
#endif
-} __attribute__((packed, aligned(4)));
+} __packed
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+__aligned(4)
+#endif
+;
#define KEY_INODE_MAX ((__u64)~0ULL)
#define KEY_OFFSET_MAX ((__u64)~0ULL)
#define KEY_SNAPSHOT_MAX ((__u32)~0U)
#define KEY_SIZE_MAX ((__u32)~0U)
-static inline struct bpos POS(__u64 inode, __u64 offset)
+static inline struct bpos SPOS(__u64 inode, __u64 offset, __u32 snapshot)
{
- struct bpos ret;
-
- ret.inode = inode;
- ret.offset = offset;
- ret.snapshot = 0;
-
- return ret;
+ return (struct bpos) {
+ .inode = inode,
+ .offset = offset,
+ .snapshot = snapshot,
+ };
}
-#define POS_MIN POS(0, 0)
-#define POS_MAX POS(KEY_INODE_MAX, KEY_OFFSET_MAX)
+#define POS_MIN SPOS(0, 0, 0)
+#define POS_MAX SPOS(KEY_INODE_MAX, KEY_OFFSET_MAX, 0)
+#define SPOS_MAX SPOS(KEY_INODE_MAX, KEY_OFFSET_MAX, KEY_SNAPSHOT_MAX)
+#define POS(_inode, _offset) SPOS(_inode, _offset, 0)
/* Empty placeholder struct, for container_of() */
struct bch_val {
__u32 hi;
__u64 lo;
#endif
-} __attribute__((packed, aligned(4)));
+} __packed __aligned(4);
struct bkey {
/* Size of combined key and value, in u64s */
__u8 pad[1];
#endif
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
struct bkey_packed {
__u64 _data[0];
* to the same size as struct bkey should hopefully be safest.
*/
__u8 pad[sizeof(struct bkey) - 3];
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
+
+typedef struct {
+ __le64 lo;
+ __le64 hi;
+} bch_le128;
#define BKEY_U64s (sizeof(struct bkey) / sizeof(__u64))
#define BKEY_U64s_MAX U8_MAX
struct bkey_i {
__u64 _data[0];
- union {
- struct {
- /* Size of combined key and value, in u64s */
- __u8 u64s;
- };
- struct {
- struct bkey k;
- struct bch_val v;
- };
- };
+ struct bkey k;
+ struct bch_val v;
};
+#define POS_KEY(_pos) \
+((struct bkey) { \
+ .u64s = BKEY_U64s, \
+ .format = KEY_FORMAT_CURRENT, \
+ .p = _pos, \
+})
+
#define KEY(_inode, _offset, _size) \
((struct bkey) { \
.u64s = BKEY_U64s, \
#define bkey_bytes(_k) ((_k)->u64s * sizeof(__u64))
#define __BKEY_PADDED(key, pad) \
- struct { struct bkey_i key; __u64 key ## _pad[pad]; }
+ struct bkey_i key; __u64 key ## _pad[pad]
/*
* - DELETED keys are used internally to mark keys that should be ignored but
* number.
*
* - WHITEOUT: for hash table btrees
-*/
+ */
#define BCH_BKEY_TYPES() \
x(deleted, 0) \
- x(discard, 1) \
+ x(whiteout, 1) \
x(error, 2) \
x(cookie, 3) \
- x(whiteout, 4) \
+ x(hash_whiteout, 4) \
x(btree_ptr, 5) \
x(extent, 6) \
x(reservation, 7) \
x(reflink_v, 16) \
x(inline_data, 17) \
x(btree_ptr_v2, 18) \
- x(indirect_inline_data, 19)
+ x(indirect_inline_data, 19) \
+ x(alloc_v2, 20) \
+ x(subvolume, 21) \
+ x(snapshot, 22) \
+ x(inode_v2, 23) \
+ x(alloc_v3, 24) \
+ x(set, 25) \
+ x(lru, 26) \
+ x(alloc_v4, 27) \
+ x(backpointer, 28) \
+ x(inode_v3, 29) \
+ x(bucket_gens, 30) \
+ x(snapshot_tree, 31) \
+ x(logged_op_truncate, 32) \
+ x(logged_op_finsert, 33)
enum bch_bkey_type {
#define x(name, nr) KEY_TYPE_##name = nr,
KEY_TYPE_MAX,
};
-struct bch_cookie {
+struct bch_deleted {
struct bch_val v;
- __le64 cookie;
-};
-
-/* Extents */
-
-/*
- * In extent bkeys, the value is a list of pointers (bch_extent_ptr), optionally
- * preceded by checksum/compression information (bch_extent_crc32 or
- * bch_extent_crc64).
- *
- * One major determining factor in the format of extents is how we handle and
- * represent extents that have been partially overwritten and thus trimmed:
- *
- * If an extent is not checksummed or compressed, when the extent is trimmed we
- * don't have to remember the extent we originally allocated and wrote: we can
- * merely adjust ptr->offset to point to the start of the data that is currently
- * live. The size field in struct bkey records the current (live) size of the
- * extent, and is also used to mean "size of region on disk that we point to" in
- * this case.
- *
- * Thus an extent that is not checksummed or compressed will consist only of a
- * list of bch_extent_ptrs, with none of the fields in
- * bch_extent_crc32/bch_extent_crc64.
- *
- * When an extent is checksummed or compressed, it's not possible to read only
- * the data that is currently live: we have to read the entire extent that was
- * originally written, and then return only the part of the extent that is
- * currently live.
- *
- * Thus, in addition to the current size of the extent in struct bkey, we need
- * to store the size of the originally allocated space - this is the
- * compressed_size and uncompressed_size fields in bch_extent_crc32/64. Also,
- * when the extent is trimmed, instead of modifying the offset field of the
- * pointer, we keep a second smaller offset field - "offset into the original
- * extent of the currently live region".
- *
- * The other major determining factor is replication and data migration:
- *
- * Each pointer may have its own bch_extent_crc32/64. When doing a replicated
- * write, we will initially write all the replicas in the same format, with the
- * same checksum type and compression format - however, when copygc runs later (or
- * tiering/cache promotion, anything that moves data), it is not in general
- * going to rewrite all the pointers at once - one of the replicas may be in a
- * bucket on one device that has very little fragmentation while another lives
- * in a bucket that has become heavily fragmented, and thus is being rewritten
- * sooner than the rest.
- *
- * Thus it will only move a subset of the pointers (or in the case of
- * tiering/cache promotion perhaps add a single pointer without dropping any
- * current pointers), and if the extent has been partially overwritten it must
- * write only the currently live portion (or copygc would not be able to reduce
- * fragmentation!) - which necessitates a different bch_extent_crc format for
- * the new pointer.
- *
- * But in the interests of space efficiency, we don't want to store one
- * bch_extent_crc for each pointer if we don't have to.
- *
- * Thus, a bch_extent consists of bch_extent_crc32s, bch_extent_crc64s, and
- * bch_extent_ptrs appended arbitrarily one after the other. We determine the
- * type of a given entry with a scheme similar to utf8 (except we're encoding a
- * type, not a size), encoding the type in the position of the first set bit:
- *
- * bch_extent_crc32 - 0b1
- * bch_extent_ptr - 0b10
- * bch_extent_crc64 - 0b100
- *
- * We do it this way because bch_extent_crc32 is _very_ constrained on bits (and
- * bch_extent_crc64 is the least constrained).
- *
- * Then, each bch_extent_crc32/64 applies to the pointers that follow after it,
- * until the next bch_extent_crc32/64.
- *
- * If there are no bch_extent_crcs preceding a bch_extent_ptr, then that pointer
- * is neither checksummed nor compressed.
- */
-
-/* 128 bits, sufficient for cryptographic MACs: */
-struct bch_csum {
- __le64 lo;
- __le64 hi;
-} __attribute__((packed, aligned(8)));
-
-#define BCH_EXTENT_ENTRY_TYPES() \
- x(ptr, 0) \
- x(crc32, 1) \
- x(crc64, 2) \
- x(crc128, 3) \
- x(stripe_ptr, 4)
-#define BCH_EXTENT_ENTRY_MAX 5
-
-enum bch_extent_entry_type {
-#define x(f, n) BCH_EXTENT_ENTRY_##f = n,
- BCH_EXTENT_ENTRY_TYPES()
-#undef x
-};
-
-/* Compressed/uncompressed size are stored biased by 1: */
-struct bch_extent_crc32 {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- __u32 type:2,
- _compressed_size:7,
- _uncompressed_size:7,
- offset:7,
- _unused:1,
- csum_type:4,
- compression_type:4;
- __u32 csum;
-#elif defined (__BIG_ENDIAN_BITFIELD)
- __u32 csum;
- __u32 compression_type:4,
- csum_type:4,
- _unused:1,
- offset:7,
- _uncompressed_size:7,
- _compressed_size:7,
- type:2;
-#endif
-} __attribute__((packed, aligned(8)));
-
-#define CRC32_SIZE_MAX (1U << 7)
-#define CRC32_NONCE_MAX 0
-
-struct bch_extent_crc64 {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- __u64 type:3,
- _compressed_size:9,
- _uncompressed_size:9,
- offset:9,
- nonce:10,
- csum_type:4,
- compression_type:4,
- csum_hi:16;
-#elif defined (__BIG_ENDIAN_BITFIELD)
- __u64 csum_hi:16,
- compression_type:4,
- csum_type:4,
- nonce:10,
- offset:9,
- _uncompressed_size:9,
- _compressed_size:9,
- type:3;
-#endif
- __u64 csum_lo;
-} __attribute__((packed, aligned(8)));
-
-#define CRC64_SIZE_MAX (1U << 9)
-#define CRC64_NONCE_MAX ((1U << 10) - 1)
-
-struct bch_extent_crc128 {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- __u64 type:4,
- _compressed_size:13,
- _uncompressed_size:13,
- offset:13,
- nonce:13,
- csum_type:4,
- compression_type:4;
-#elif defined (__BIG_ENDIAN_BITFIELD)
- __u64 compression_type:4,
- csum_type:4,
- nonce:13,
- offset:13,
- _uncompressed_size:13,
- _compressed_size:13,
- type:4;
-#endif
- struct bch_csum csum;
-} __attribute__((packed, aligned(8)));
-
-#define CRC128_SIZE_MAX (1U << 13)
-#define CRC128_NONCE_MAX ((1U << 13) - 1)
-
-/*
- * @reservation - pointer hasn't been written to, just reserved
- */
-struct bch_extent_ptr {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- __u64 type:1,
- cached:1,
- unused:1,
- reservation:1,
- offset:44, /* 8 petabytes */
- dev:8,
- gen:8;
-#elif defined (__BIG_ENDIAN_BITFIELD)
- __u64 gen:8,
- dev:8,
- offset:44,
- reservation:1,
- unused:1,
- cached:1,
- type:1;
-#endif
-} __attribute__((packed, aligned(8)));
-
-struct bch_extent_stripe_ptr {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- __u64 type:5,
- block:8,
- idx:51;
-#elif defined (__BIG_ENDIAN_BITFIELD)
- __u64 idx:51,
- block:8,
- type:5;
-#endif
-};
-
-struct bch_extent_reservation {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
- __u64 type:6,
- unused:22,
- replicas:4,
- generation:32;
-#elif defined (__BIG_ENDIAN_BITFIELD)
- __u64 generation:32,
- replicas:4,
- unused:22,
- type:6;
-#endif
-};
-
-union bch_extent_entry {
-#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ || __BITS_PER_LONG == 64
- unsigned long type;
-#elif __BITS_PER_LONG == 32
- struct {
- unsigned long pad;
- unsigned long type;
- };
-#else
-#error edit for your odd byteorder.
-#endif
-
-#define x(f, n) struct bch_extent_##f f;
- BCH_EXTENT_ENTRY_TYPES()
-#undef x
};
-struct bch_btree_ptr {
+struct bch_whiteout {
struct bch_val v;
-
- struct bch_extent_ptr start[0];
- __u64 _data[0];
-} __attribute__((packed, aligned(8)));
-
-struct bch_btree_ptr_v2 {
- struct bch_val v;
-
- __u64 mem_ptr;
- __le64 seq;
- __le16 sectors_written;
- /* In case we ever decide to do variable size btree nodes: */
- __le16 sectors;
- struct bpos min_key;
- struct bch_extent_ptr start[0];
- __u64 _data[0];
-} __attribute__((packed, aligned(8)));
-
-struct bch_extent {
- struct bch_val v;
-
- union bch_extent_entry start[0];
- __u64 _data[0];
-} __attribute__((packed, aligned(8)));
-
-struct bch_reservation {
- struct bch_val v;
-
- __le32 generation;
- __u8 nr_replicas;
- __u8 pad[3];
-} __attribute__((packed, aligned(8)));
-
-/* Maximum size (in u64s) a single pointer could be: */
-#define BKEY_EXTENT_PTR_U64s_MAX\
- ((sizeof(struct bch_extent_crc128) + \
- sizeof(struct bch_extent_ptr)) / sizeof(u64))
-
-/* Maximum possible size of an entire extent value: */
-#define BKEY_EXTENT_VAL_U64s_MAX \
- (1 + BKEY_EXTENT_PTR_U64s_MAX * (BCH_REPLICAS_MAX + 1))
-
-#define BKEY_PADDED(key) __BKEY_PADDED(key, BKEY_EXTENT_VAL_U64s_MAX)
-
-/* * Maximum possible size of an entire extent, key + value: */
-#define BKEY_EXTENT_U64s_MAX (BKEY_U64s + BKEY_EXTENT_VAL_U64s_MAX)
-
-/* Btree pointers don't carry around checksums: */
-#define BKEY_BTREE_PTR_VAL_U64s_MAX \
- ((sizeof(struct bch_btree_ptr_v2) + \
- sizeof(struct bch_extent_ptr) * BCH_REPLICAS_MAX) / sizeof(u64))
-#define BKEY_BTREE_PTR_U64s_MAX \
- (BKEY_U64s + BKEY_BTREE_PTR_VAL_U64s_MAX)
-
-/* Inodes */
-
-#define BLOCKDEV_INODE_MAX 4096
-
-#define BCACHEFS_ROOT_INO 4096
-
-struct bch_inode {
- struct bch_val v;
-
- __le64 bi_hash_seed;
- __le32 bi_flags;
- __le16 bi_mode;
- __u8 fields[0];
-} __attribute__((packed, aligned(8)));
-
-struct bch_inode_generation {
- struct bch_val v;
-
- __le32 bi_generation;
- __le32 pad;
-} __attribute__((packed, aligned(8)));
-
-#define BCH_INODE_FIELDS() \
- x(bi_atime, 96) \
- x(bi_ctime, 96) \
- x(bi_mtime, 96) \
- x(bi_otime, 96) \
- x(bi_size, 64) \
- x(bi_sectors, 64) \
- x(bi_uid, 32) \
- x(bi_gid, 32) \
- x(bi_nlink, 32) \
- x(bi_generation, 32) \
- x(bi_dev, 32) \
- x(bi_data_checksum, 8) \
- x(bi_compression, 8) \
- x(bi_project, 32) \
- x(bi_background_compression, 8) \
- x(bi_data_replicas, 8) \
- x(bi_promote_target, 16) \
- x(bi_foreground_target, 16) \
- x(bi_background_target, 16) \
- x(bi_erasure_code, 16) \
- x(bi_fields_set, 16)
-
-/* subset of BCH_INODE_FIELDS */
-#define BCH_INODE_OPTS() \
- x(data_checksum, 8) \
- x(compression, 8) \
- x(project, 32) \
- x(background_compression, 8) \
- x(data_replicas, 8) \
- x(promote_target, 16) \
- x(foreground_target, 16) \
- x(background_target, 16) \
- x(erasure_code, 16)
-
-enum inode_opt_id {
-#define x(name, ...) \
- Inode_opt_##name,
- BCH_INODE_OPTS()
-#undef x
- Inode_opt_nr,
};
-enum {
- /*
- * User flags (get/settable with FS_IOC_*FLAGS, correspond to FS_*_FL
- * flags)
- */
- __BCH_INODE_SYNC = 0,
- __BCH_INODE_IMMUTABLE = 1,
- __BCH_INODE_APPEND = 2,
- __BCH_INODE_NODUMP = 3,
- __BCH_INODE_NOATIME = 4,
-
- __BCH_INODE_I_SIZE_DIRTY= 5,
- __BCH_INODE_I_SECTORS_DIRTY= 6,
- __BCH_INODE_UNLINKED = 7,
-
- /* bits 20+ reserved for packed fields below: */
-};
-
-#define BCH_INODE_SYNC (1 << __BCH_INODE_SYNC)
-#define BCH_INODE_IMMUTABLE (1 << __BCH_INODE_IMMUTABLE)
-#define BCH_INODE_APPEND (1 << __BCH_INODE_APPEND)
-#define BCH_INODE_NODUMP (1 << __BCH_INODE_NODUMP)
-#define BCH_INODE_NOATIME (1 << __BCH_INODE_NOATIME)
-#define BCH_INODE_I_SIZE_DIRTY (1 << __BCH_INODE_I_SIZE_DIRTY)
-#define BCH_INODE_I_SECTORS_DIRTY (1 << __BCH_INODE_I_SECTORS_DIRTY)
-#define BCH_INODE_UNLINKED (1 << __BCH_INODE_UNLINKED)
-
-LE32_BITMASK(INODE_STR_HASH, struct bch_inode, bi_flags, 20, 24);
-LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 31);
-LE32_BITMASK(INODE_NEW_VARINT, struct bch_inode, bi_flags, 31, 32);
-
-/* Dirents */
-
-/*
- * Dirents (and xattrs) have to implement string lookups; since our b-tree
- * doesn't support arbitrary length strings for the key, we instead index by a
- * 64 bit hash (currently truncated sha1) of the string, stored in the offset
- * field of the key - using linear probing to resolve hash collisions. This also
- * provides us with the readdir cookie posix requires.
- *
- * Linear probing requires us to use whiteouts for deletions, in the event of a
- * collision:
- */
-
-struct bch_dirent {
- struct bch_val v;
-
- /* Target inode number: */
- __le64 d_inum;
-
- /*
- * Copy of mode bits 12-15 from the target inode - so userspace can get
- * the filetype without having to do a stat()
- */
- __u8 d_type;
-
- __u8 d_name[];
-} __attribute__((packed, aligned(8)));
-
-#define BCH_NAME_MAX (U8_MAX * sizeof(u64) - \
- sizeof(struct bkey) - \
- offsetof(struct bch_dirent, d_name))
-
-
-/* Xattrs */
-
-#define KEY_TYPE_XATTR_INDEX_USER 0
-#define KEY_TYPE_XATTR_INDEX_POSIX_ACL_ACCESS 1
-#define KEY_TYPE_XATTR_INDEX_POSIX_ACL_DEFAULT 2
-#define KEY_TYPE_XATTR_INDEX_TRUSTED 3
-#define KEY_TYPE_XATTR_INDEX_SECURITY 4
-
-struct bch_xattr {
+struct bch_error {
struct bch_val v;
- __u8 x_type;
- __u8 x_name_len;
- __le16 x_val_len;
- __u8 x_name[];
-} __attribute__((packed, aligned(8)));
-
-/* Bucket/allocation information: */
-
-struct bch_alloc {
- struct bch_val v;
- __u8 fields;
- __u8 gen;
- __u8 data[];
-} __attribute__((packed, aligned(8)));
-
-#define BCH_ALLOC_FIELDS() \
- x(read_time, 16) \
- x(write_time, 16) \
- x(data_type, 8) \
- x(dirty_sectors, 16) \
- x(cached_sectors, 16) \
- x(oldest_gen, 8)
-
-enum {
-#define x(name, bytes) BCH_ALLOC_FIELD_##name,
- BCH_ALLOC_FIELDS()
-#undef x
- BCH_ALLOC_FIELD_NR
-};
-
-static const unsigned BCH_ALLOC_FIELD_BYTES[] = {
-#define x(name, bits) [BCH_ALLOC_FIELD_##name] = bits / 8,
- BCH_ALLOC_FIELDS()
-#undef x
-};
-
-#define x(name, bits) + (bits / 8)
-static const unsigned BKEY_ALLOC_VAL_U64s_MAX =
- DIV_ROUND_UP(offsetof(struct bch_alloc, data)
- BCH_ALLOC_FIELDS(), sizeof(u64));
-#undef x
-
-#define BKEY_ALLOC_U64s_MAX (BKEY_U64s + BKEY_ALLOC_VAL_U64s_MAX)
-
-/* Quotas: */
-
-enum quota_types {
- QTYP_USR = 0,
- QTYP_GRP = 1,
- QTYP_PRJ = 2,
- QTYP_NR = 3,
};
-enum quota_counters {
- Q_SPC = 0,
- Q_INO = 1,
- Q_COUNTERS = 2,
+struct bch_cookie {
+ struct bch_val v;
+ __le64 cookie;
};
-struct bch_quota_counter {
- __le64 hardlimit;
- __le64 softlimit;
+struct bch_hash_whiteout {
+ struct bch_val v;
};
-struct bch_quota {
+struct bch_set {
struct bch_val v;
- struct bch_quota_counter c[Q_COUNTERS];
-} __attribute__((packed, aligned(8)));
+};
-/* Erasure coding */
+/* 128 bits, sufficient for cryptographic MACs: */
+struct bch_csum {
+ __le64 lo;
+ __le64 hi;
+} __packed __aligned(8);
-struct bch_stripe {
+struct bch_backpointer {
struct bch_val v;
- __le16 sectors;
- __u8 algorithm;
- __u8 nr_blocks;
- __u8 nr_redundant;
-
- __u8 csum_granularity_bits;
- __u8 csum_type;
- __u8 pad;
-
- struct bch_extent_ptr ptrs[0];
-} __attribute__((packed, aligned(8)));
+ __u8 btree_id;
+ __u8 level;
+ __u8 data_type;
+ __u64 bucket_offset:40;
+ __u32 bucket_len;
+ struct bpos pos;
+} __packed __aligned(8);
-/* Reflink: */
+/* LRU btree: */
-struct bch_reflink_p {
+struct bch_lru {
struct bch_val v;
__le64 idx;
+} __packed __aligned(8);
- __le32 reservation_generation;
- __u8 nr_replicas;
- __u8 pad[3];
-};
-
-struct bch_reflink_v {
- struct bch_val v;
- __le64 refcount;
- union bch_extent_entry start[0];
- __u64 _data[0];
-};
-
-struct bch_indirect_inline_data {
- struct bch_val v;
- __le64 refcount;
- u8 data[0];
-};
-
-/* Inline data */
-
-struct bch_inline_data {
- struct bch_val v;
- u8 data[0];
-};
+#define LRU_ID_STRIPES (1U << 16)
/* Optional/variable size superblock sections: */
__le32 type;
};
-#define BCH_SB_FIELDS() \
- x(journal, 0) \
- x(members, 1) \
- x(crypt, 2) \
- x(replicas_v0, 3) \
- x(quota, 4) \
- x(disk_groups, 5) \
- x(clean, 6) \
- x(replicas, 7) \
- x(journal_seq_blacklist, 8)
+#define BCH_SB_FIELDS() \
+ x(journal, 0) \
+ x(members_v1, 1) \
+ x(crypt, 2) \
+ x(replicas_v0, 3) \
+ x(quota, 4) \
+ x(disk_groups, 5) \
+ x(clean, 6) \
+ x(replicas, 7) \
+ x(journal_seq_blacklist, 8) \
+ x(journal_v2, 9) \
+ x(counters, 10) \
+ x(members_v2, 11) \
+ x(errors, 12) \
+ x(ext, 13) \
+ x(downgrade, 14)
+
+#include "alloc_background_format.h"
+#include "extents_format.h"
+#include "reflink_format.h"
+#include "ec_format.h"
+#include "inode_format.h"
+#include "dirent_format.h"
+#include "xattr_format.h"
+#include "quota_format.h"
+#include "logged_ops_format.h"
+#include "snapshot_format.h"
+#include "subvolume_format.h"
+#include "sb-counters_format.h"
enum bch_sb_field_type {
#define x(f, nr) BCH_SB_FIELD_##f = nr,
BCH_SB_FIELD_NR
};
+/*
+ * Most superblock fields are replicated in all device's superblocks - a few are
+ * not:
+ */
+#define BCH_SINGLE_DEVICE_SB_FIELDS \
+ ((1U << BCH_SB_FIELD_journal)| \
+ (1U << BCH_SB_FIELD_journal_v2))
+
/* BCH_SB_FIELD_journal: */
struct bch_sb_field_journal {
struct bch_sb_field field;
- __le64 buckets[0];
+ __le64 buckets[];
};
-/* BCH_SB_FIELD_members: */
+struct bch_sb_field_journal_v2 {
+ struct bch_sb_field field;
+
+ struct bch_sb_field_journal_v2_entry {
+ __le64 start;
+ __le64 nr;
+ } d[];
+};
+
+/* BCH_SB_FIELD_members_v1: */
#define BCH_MIN_NR_NBUCKETS (1 << 6)
+#define BCH_IOPS_MEASUREMENTS() \
+ x(seqread, 0) \
+ x(seqwrite, 1) \
+ x(randread, 2) \
+ x(randwrite, 3)
+
+enum bch_iops_measurement {
+#define x(t, n) BCH_IOPS_##t = n,
+ BCH_IOPS_MEASUREMENTS()
+#undef x
+ BCH_IOPS_NR
+};
+
+#define BCH_MEMBER_ERROR_TYPES() \
+ x(read, 0) \
+ x(write, 1) \
+ x(checksum, 2)
+
+enum bch_member_error_type {
+#define x(t, n) BCH_MEMBER_ERROR_##t = n,
+ BCH_MEMBER_ERROR_TYPES()
+#undef x
+ BCH_MEMBER_ERROR_NR
+};
+
struct bch_member {
- uuid_le uuid;
+ __uuid_t uuid;
__le64 nbuckets; /* device size */
__le16 first_bucket; /* index of first bucket used */
__le16 bucket_size; /* sectors */
__le32 pad;
__le64 last_mount; /* time_t */
- __le64 flags[2];
+ __le64 flags;
+ __le32 iops[4];
+ __le64 errors[BCH_MEMBER_ERROR_NR];
+ __le64 errors_at_reset[BCH_MEMBER_ERROR_NR];
+ __le64 errors_reset_time;
+ __le64 seq;
};
-LE64_BITMASK(BCH_MEMBER_STATE, struct bch_member, flags[0], 0, 4)
-/* 4-10 unused, was TIER, HAS_(META)DATA */
-LE64_BITMASK(BCH_MEMBER_REPLACEMENT, struct bch_member, flags[0], 10, 14)
-LE64_BITMASK(BCH_MEMBER_DISCARD, struct bch_member, flags[0], 14, 15)
-LE64_BITMASK(BCH_MEMBER_DATA_ALLOWED, struct bch_member, flags[0], 15, 20)
-LE64_BITMASK(BCH_MEMBER_GROUP, struct bch_member, flags[0], 20, 28)
-LE64_BITMASK(BCH_MEMBER_DURABILITY, struct bch_member, flags[0], 28, 30)
+#define BCH_MEMBER_V1_BYTES 56
-#define BCH_TIER_MAX 4U
+LE64_BITMASK(BCH_MEMBER_STATE, struct bch_member, flags, 0, 4)
+/* 4-14 unused, was TIER, HAS_(META)DATA, REPLACEMENT */
+LE64_BITMASK(BCH_MEMBER_DISCARD, struct bch_member, flags, 14, 15)
+LE64_BITMASK(BCH_MEMBER_DATA_ALLOWED, struct bch_member, flags, 15, 20)
+LE64_BITMASK(BCH_MEMBER_GROUP, struct bch_member, flags, 20, 28)
+LE64_BITMASK(BCH_MEMBER_DURABILITY, struct bch_member, flags, 28, 30)
+LE64_BITMASK(BCH_MEMBER_FREESPACE_INITIALIZED,
+ struct bch_member, flags, 30, 31)
#if 0
LE64_BITMASK(BCH_MEMBER_NR_READ_ERRORS, struct bch_member, flags[1], 0, 20);
LE64_BITMASK(BCH_MEMBER_NR_WRITE_ERRORS,struct bch_member, flags[1], 20, 40);
#endif
+#define BCH_MEMBER_STATES() \
+ x(rw, 0) \
+ x(ro, 1) \
+ x(failed, 2) \
+ x(spare, 3)
+
enum bch_member_state {
- BCH_MEMBER_STATE_RW = 0,
- BCH_MEMBER_STATE_RO = 1,
- BCH_MEMBER_STATE_FAILED = 2,
- BCH_MEMBER_STATE_SPARE = 3,
- BCH_MEMBER_STATE_NR = 4,
+#define x(t, n) BCH_MEMBER_STATE_##t = n,
+ BCH_MEMBER_STATES()
+#undef x
+ BCH_MEMBER_STATE_NR
};
-enum cache_replacement {
- CACHE_REPLACEMENT_LRU = 0,
- CACHE_REPLACEMENT_FIFO = 1,
- CACHE_REPLACEMENT_RANDOM = 2,
- CACHE_REPLACEMENT_NR = 3,
+struct bch_sb_field_members_v1 {
+ struct bch_sb_field field;
+ struct bch_member _members[]; //Members are now variable size
};
-struct bch_sb_field_members {
+struct bch_sb_field_members_v2 {
struct bch_sb_field field;
- struct bch_member members[0];
+ __le16 member_bytes; //size of single member entry
+ u8 pad[6];
+ struct bch_member _members[];
};
/* BCH_SB_FIELD_crypt: */
};
#define BCH_KEY_MAGIC \
- (((u64) 'b' << 0)|((u64) 'c' << 8)| \
- ((u64) 'h' << 16)|((u64) '*' << 24)| \
- ((u64) '*' << 32)|((u64) 'k' << 40)| \
- ((u64) 'e' << 48)|((u64) 'y' << 56))
+ (((__u64) 'b' << 0)|((__u64) 'c' << 8)| \
+ ((__u64) 'h' << 16)|((__u64) '*' << 24)| \
+ ((__u64) '*' << 32)|((__u64) 'k' << 40)| \
+ ((__u64) 'e' << 48)|((__u64) 'y' << 56))
struct bch_encrypted_key {
__le64 magic;
/* BCH_SB_FIELD_replicas: */
#define BCH_DATA_TYPES() \
- x(none, 0) \
+ x(free, 0) \
x(sb, 1) \
x(journal, 2) \
x(btree, 3) \
x(user, 4) \
x(cached, 5) \
- x(parity, 6)
+ x(parity, 6) \
+ x(stripe, 7) \
+ x(need_gc_gens, 8) \
+ x(need_discard, 9)
enum bch_data_type {
#define x(t, n) BCH_DATA_##t,
BCH_DATA_NR
};
+static inline bool data_type_is_empty(enum bch_data_type type)
+{
+ switch (type) {
+ case BCH_DATA_free:
+ case BCH_DATA_need_gc_gens:
+ case BCH_DATA_need_discard:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static inline bool data_type_is_hidden(enum bch_data_type type)
+{
+ switch (type) {
+ case BCH_DATA_sb:
+ case BCH_DATA_journal:
+ return true;
+ default:
+ return false;
+ }
+}
+
struct bch_replicas_entry_v0 {
__u8 data_type;
__u8 nr_devs;
- __u8 devs[0];
-} __attribute__((packed));
+ __u8 devs[];
+} __packed;
struct bch_sb_field_replicas_v0 {
struct bch_sb_field field;
- struct bch_replicas_entry_v0 entries[0];
-} __attribute__((packed, aligned(8)));
+ struct bch_replicas_entry_v0 entries[];
+} __packed __aligned(8);
-struct bch_replicas_entry {
+struct bch_replicas_entry_v1 {
__u8 data_type;
__u8 nr_devs;
__u8 nr_required;
- __u8 devs[0];
-} __attribute__((packed));
+ __u8 devs[];
+} __packed;
#define replicas_entry_bytes(_i) \
(offsetof(typeof(*(_i)), devs) + (_i)->nr_devs)
struct bch_sb_field_replicas {
struct bch_sb_field field;
- struct bch_replicas_entry entries[0];
-} __attribute__((packed, aligned(8)));
-
-/* BCH_SB_FIELD_quota: */
-
-struct bch_sb_quota_counter {
- __le32 timelimit;
- __le32 warnlimit;
-};
-
-struct bch_sb_quota_type {
- __le64 flags;
- struct bch_sb_quota_counter c[Q_COUNTERS];
-};
-
-struct bch_sb_field_quota {
- struct bch_sb_field field;
- struct bch_sb_quota_type q[QTYP_NR];
-} __attribute__((packed, aligned(8)));
+ struct bch_replicas_entry_v1 entries[];
+} __packed __aligned(8);
/* BCH_SB_FIELD_disk_groups: */
struct bch_disk_group {
__u8 label[BCH_SB_LABEL_SIZE];
__le64 flags[2];
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
LE64_BITMASK(BCH_GROUP_DELETED, struct bch_disk_group, flags[0], 0, 1)
LE64_BITMASK(BCH_GROUP_DATA_ALLOWED, struct bch_disk_group, flags[0], 1, 6)
struct bch_sb_field_disk_groups {
struct bch_sb_field field;
- struct bch_disk_group entries[0];
-} __attribute__((packed, aligned(8)));
+ struct bch_disk_group entries[];
+} __packed __aligned(8);
/*
* On clean shutdown, store btree roots and current journal sequence number in
__u8 type; /* designates what this jset holds */
__u8 pad[3];
- union {
- struct bkey_i start[0];
- __u64 _data[0];
- };
+ struct bkey_i start[0];
+ __u64 _data[];
};
struct bch_sb_field_clean {
struct bch_sb_field field;
__le32 flags;
- __le16 read_clock;
- __le16 write_clock;
+ __le16 _read_clock; /* no longer used */
+ __le16 _write_clock;
__le64 journal_seq;
- union {
- struct jset_entry start[0];
- __u64 _data[0];
- };
+ struct jset_entry start[0];
+ __u64 _data[];
};
struct journal_seq_blacklist_entry {
struct bch_sb_field_journal_seq_blacklist {
struct bch_sb_field field;
+ struct journal_seq_blacklist_entry start[];
+};
- union {
- struct journal_seq_blacklist_entry start[0];
- __u64 _data[0];
- };
+struct bch_sb_field_errors {
+ struct bch_sb_field field;
+ struct bch_sb_field_error_entry {
+ __le64 v;
+ __le64 last_error_time;
+ } entries[];
+};
+
+LE64_BITMASK(BCH_SB_ERROR_ENTRY_ID, struct bch_sb_field_error_entry, v, 0, 16);
+LE64_BITMASK(BCH_SB_ERROR_ENTRY_NR, struct bch_sb_field_error_entry, v, 16, 64);
+
+struct bch_sb_field_ext {
+ struct bch_sb_field field;
+ __le64 recovery_passes_required[2];
+ __le64 errors_silent[8];
+};
+
+struct bch_sb_field_downgrade_entry {
+ __le16 version;
+ __le64 recovery_passes[2];
+ __le16 nr_errors;
+ __le16 errors[] __counted_by(nr_errors);
+} __packed __aligned(2);
+
+struct bch_sb_field_downgrade {
+ struct bch_sb_field field;
+ struct bch_sb_field_downgrade_entry entries[];
};
/* Superblock: */
* One common version number for all on disk data structures - superblock, btree
* nodes, journal entries
*/
-#define BCH_JSET_VERSION_OLD 2
-#define BCH_BSET_VERSION_OLD 3
+#define BCH_VERSION_MAJOR(_v) ((__u16) ((_v) >> 10))
+#define BCH_VERSION_MINOR(_v) ((__u16) ((_v) & ~(~0U << 10)))
+#define BCH_VERSION(_major, _minor) (((_major) << 10)|(_minor) << 0)
+
+/*
+ * field 1: version name
+ * field 2: BCH_VERSION(major, minor)
+ * field 3: recovery passess required on upgrade
+ */
+#define BCH_METADATA_VERSIONS() \
+ x(bkey_renumber, BCH_VERSION(0, 10)) \
+ x(inode_btree_change, BCH_VERSION(0, 11)) \
+ x(snapshot, BCH_VERSION(0, 12)) \
+ x(inode_backpointers, BCH_VERSION(0, 13)) \
+ x(btree_ptr_sectors_written, BCH_VERSION(0, 14)) \
+ x(snapshot_2, BCH_VERSION(0, 15)) \
+ x(reflink_p_fix, BCH_VERSION(0, 16)) \
+ x(subvol_dirent, BCH_VERSION(0, 17)) \
+ x(inode_v2, BCH_VERSION(0, 18)) \
+ x(freespace, BCH_VERSION(0, 19)) \
+ x(alloc_v4, BCH_VERSION(0, 20)) \
+ x(new_data_types, BCH_VERSION(0, 21)) \
+ x(backpointers, BCH_VERSION(0, 22)) \
+ x(inode_v3, BCH_VERSION(0, 23)) \
+ x(unwritten_extents, BCH_VERSION(0, 24)) \
+ x(bucket_gens, BCH_VERSION(0, 25)) \
+ x(lru_v2, BCH_VERSION(0, 26)) \
+ x(fragmentation_lru, BCH_VERSION(0, 27)) \
+ x(no_bps_in_alloc_keys, BCH_VERSION(0, 28)) \
+ x(snapshot_trees, BCH_VERSION(0, 29)) \
+ x(major_minor, BCH_VERSION(1, 0)) \
+ x(snapshot_skiplists, BCH_VERSION(1, 1)) \
+ x(deleted_inodes, BCH_VERSION(1, 2)) \
+ x(rebalance_work, BCH_VERSION(1, 3)) \
+ x(member_seq, BCH_VERSION(1, 4)) \
+ x(subvolume_fs_parent, BCH_VERSION(1, 5)) \
+ x(btree_subvolume_children, BCH_VERSION(1, 6))
enum bcachefs_metadata_version {
- bcachefs_metadata_version_min = 9,
- bcachefs_metadata_version_new_versioning = 10,
- bcachefs_metadata_version_bkey_renumber = 10,
- bcachefs_metadata_version_inode_btree_change = 11,
- bcachefs_metadata_version_max = 12,
+ bcachefs_metadata_version_min = 9,
+#define x(t, n) bcachefs_metadata_version_##t = n,
+ BCH_METADATA_VERSIONS()
+#undef x
+ bcachefs_metadata_version_max
};
+static const __maybe_unused
+unsigned bcachefs_metadata_required_upgrade_below = bcachefs_metadata_version_rebalance_work;
+
#define bcachefs_metadata_version_current (bcachefs_metadata_version_max - 1)
#define BCH_SB_SECTOR 8
#define BCH_SB_MEMBERS_MAX 64 /* XXX kill */
struct bch_sb_layout {
- uuid_le magic; /* bcachefs superblock UUID */
+ __uuid_t magic; /* bcachefs superblock UUID */
__u8 layout_type;
__u8 sb_max_size_bits; /* base 2 of 512 byte sectors */
__u8 nr_superblocks;
__u8 pad[5];
__le64 sb_offset[61];
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
#define BCH_SB_LAYOUT_SECTOR 7
* @version_min - Oldest metadata version this filesystem contains; so we can
* safely drop compatibility code and refuse to mount filesystems
* we'd need it for
- * @magic - identifies as a bcachefs superblock (BCACHE_MAGIC)
+ * @magic - identifies as a bcachefs superblock (BCHFS_MAGIC)
* @seq - incremented each time superblock is written
* @uuid - used for generating various magic numbers and identifying
* member devices, never changes
__le16 version;
__le16 version_min;
__le16 pad[2];
- uuid_le magic;
- uuid_le uuid;
- uuid_le user_uuid;
+ __uuid_t magic;
+ __uuid_t uuid;
+ __uuid_t user_uuid;
__u8 label[BCH_SB_LABEL_SIZE];
__le64 offset;
__le64 seq;
__le32 time_base_hi;
__le32 time_precision;
- __le64 flags[8];
+ __le64 flags[7];
+ __le64 write_time;
__le64 features[2];
__le64 compat[2];
struct bch_sb_layout layout;
- union {
- struct bch_sb_field start[0];
- __le64 _data[0];
- };
-} __attribute__((packed, aligned(8)));
+ struct bch_sb_field start[0];
+ __le64 _data[];
+} __packed __aligned(8);
/*
* Flags:
LE64_BITMASK(BCH_SB_PRJQUOTA, struct bch_sb, flags[0], 59, 60);
LE64_BITMASK(BCH_SB_HAS_ERRORS, struct bch_sb, flags[0], 60, 61);
+LE64_BITMASK(BCH_SB_HAS_TOPOLOGY_ERRORS,struct bch_sb, flags[0], 61, 62);
-LE64_BITMASK(BCH_SB_REFLINK, struct bch_sb, flags[0], 61, 62);
-
-/* 61-64 unused */
+LE64_BITMASK(BCH_SB_BIG_ENDIAN, struct bch_sb, flags[0], 62, 63);
LE64_BITMASK(BCH_SB_STR_HASH_TYPE, struct bch_sb, flags[1], 0, 4);
-LE64_BITMASK(BCH_SB_COMPRESSION_TYPE, struct bch_sb, flags[1], 4, 8);
+LE64_BITMASK(BCH_SB_COMPRESSION_TYPE_LO,struct bch_sb, flags[1], 4, 8);
LE64_BITMASK(BCH_SB_INODE_32BIT, struct bch_sb, flags[1], 8, 9);
LE64_BITMASK(BCH_SB_128_BIT_MACS, struct bch_sb, flags[1], 9, 10);
LE64_BITMASK(BCH_SB_FOREGROUND_TARGET, struct bch_sb, flags[1], 40, 52);
LE64_BITMASK(BCH_SB_BACKGROUND_TARGET, struct bch_sb, flags[1], 52, 64);
-LE64_BITMASK(BCH_SB_BACKGROUND_COMPRESSION_TYPE,
+LE64_BITMASK(BCH_SB_BACKGROUND_COMPRESSION_TYPE_LO,
struct bch_sb, flags[2], 0, 4);
LE64_BITMASK(BCH_SB_GC_RESERVE_BYTES, struct bch_sb, flags[2], 4, 64);
LE64_BITMASK(BCH_SB_ERASURE_CODE, struct bch_sb, flags[3], 0, 16);
+LE64_BITMASK(BCH_SB_METADATA_TARGET, struct bch_sb, flags[3], 16, 28);
+LE64_BITMASK(BCH_SB_SHARD_INUMS, struct bch_sb, flags[3], 28, 29);
+LE64_BITMASK(BCH_SB_INODES_USE_KEY_CACHE,struct bch_sb, flags[3], 29, 30);
+LE64_BITMASK(BCH_SB_JOURNAL_FLUSH_DELAY,struct bch_sb, flags[3], 30, 62);
+LE64_BITMASK(BCH_SB_JOURNAL_FLUSH_DISABLED,struct bch_sb, flags[3], 62, 63);
+LE64_BITMASK(BCH_SB_JOURNAL_RECLAIM_DELAY,struct bch_sb, flags[4], 0, 32);
+LE64_BITMASK(BCH_SB_JOURNAL_TRANSACTION_NAMES,struct bch_sb, flags[4], 32, 33);
+LE64_BITMASK(BCH_SB_NOCOW, struct bch_sb, flags[4], 33, 34);
+LE64_BITMASK(BCH_SB_WRITE_BUFFER_SIZE, struct bch_sb, flags[4], 34, 54);
+LE64_BITMASK(BCH_SB_VERSION_UPGRADE, struct bch_sb, flags[4], 54, 56);
+
+LE64_BITMASK(BCH_SB_COMPRESSION_TYPE_HI,struct bch_sb, flags[4], 56, 60);
+LE64_BITMASK(BCH_SB_BACKGROUND_COMPRESSION_TYPE_HI,
+ struct bch_sb, flags[4], 60, 64);
+
+LE64_BITMASK(BCH_SB_VERSION_UPGRADE_COMPLETE,
+ struct bch_sb, flags[5], 0, 16);
+
+static inline __u64 BCH_SB_COMPRESSION_TYPE(const struct bch_sb *sb)
+{
+ return BCH_SB_COMPRESSION_TYPE_LO(sb) | (BCH_SB_COMPRESSION_TYPE_HI(sb) << 4);
+}
+
+static inline void SET_BCH_SB_COMPRESSION_TYPE(struct bch_sb *sb, __u64 v)
+{
+ SET_BCH_SB_COMPRESSION_TYPE_LO(sb, v);
+ SET_BCH_SB_COMPRESSION_TYPE_HI(sb, v >> 4);
+}
+
+static inline __u64 BCH_SB_BACKGROUND_COMPRESSION_TYPE(const struct bch_sb *sb)
+{
+ return BCH_SB_BACKGROUND_COMPRESSION_TYPE_LO(sb) |
+ (BCH_SB_BACKGROUND_COMPRESSION_TYPE_HI(sb) << 4);
+}
+
+static inline void SET_BCH_SB_BACKGROUND_COMPRESSION_TYPE(struct bch_sb *sb, __u64 v)
+{
+ SET_BCH_SB_BACKGROUND_COMPRESSION_TYPE_LO(sb, v);
+ SET_BCH_SB_BACKGROUND_COMPRESSION_TYPE_HI(sb, v >> 4);
+}
/*
* Features:
* journal_seq_blacklist_v3: gates BCH_SB_FIELD_journal_seq_blacklist
* reflink: gates KEY_TYPE_reflink
* inline_data: gates KEY_TYPE_inline_data
- * new_siphash: gates BCH_STR_HASH_SIPHASH
+ * new_siphash: gates BCH_STR_HASH_siphash
* new_extent_overwrite: gates BTREE_NODE_NEW_EXTENT_OVERWRITE
*/
#define BCH_SB_FEATURES() \
x(extents_above_btree_updates, 12) \
x(btree_updates_journalled, 13) \
x(reflink_inline_data, 14) \
- x(new_varint, 15)
+ x(new_varint, 15) \
+ x(journal_no_flush, 16) \
+ x(alloc_v2, 17) \
+ x(extents_across_btree_nodes, 18)
+
+#define BCH_SB_FEATURES_ALWAYS \
+ ((1ULL << BCH_FEATURE_new_extent_overwrite)| \
+ (1ULL << BCH_FEATURE_extents_above_btree_updates)|\
+ (1ULL << BCH_FEATURE_btree_updates_journalled)|\
+ (1ULL << BCH_FEATURE_alloc_v2)|\
+ (1ULL << BCH_FEATURE_extents_across_btree_nodes))
#define BCH_SB_FEATURES_ALL \
- ((1ULL << BCH_FEATURE_new_siphash)| \
- (1ULL << BCH_FEATURE_new_extent_overwrite)| \
+ (BCH_SB_FEATURES_ALWAYS| \
+ (1ULL << BCH_FEATURE_new_siphash)| \
(1ULL << BCH_FEATURE_btree_ptr_v2)| \
- (1ULL << BCH_FEATURE_extents_above_btree_updates)|\
- (1ULL << BCH_FEATURE_new_varint))\
+ (1ULL << BCH_FEATURE_new_varint)| \
+ (1ULL << BCH_FEATURE_journal_no_flush))
enum bch_sb_feature {
#define x(f, n) BCH_FEATURE_##f,
BCH_FEATURE_NR,
};
+#define BCH_SB_COMPAT() \
+ x(alloc_info, 0) \
+ x(alloc_metadata, 1) \
+ x(extents_above_btree_updates_done, 2) \
+ x(bformat_overflow_done, 3)
+
enum bch_sb_compat {
- BCH_COMPAT_FEAT_ALLOC_INFO = 0,
- BCH_COMPAT_FEAT_ALLOC_METADATA = 1,
+#define x(f, n) BCH_COMPAT_##f,
+ BCH_SB_COMPAT()
+#undef x
+ BCH_COMPAT_NR,
};
/* options: */
+#define BCH_VERSION_UPGRADE_OPTS() \
+ x(compatible, 0) \
+ x(incompatible, 1) \
+ x(none, 2)
+
+enum bch_version_upgrade_opts {
+#define x(t, n) BCH_VERSION_UPGRADE_##t = n,
+ BCH_VERSION_UPGRADE_OPTS()
+#undef x
+};
+
#define BCH_REPLICAS_MAX 4U
+#define BCH_BKEY_PTRS_MAX 16U
+
+#define BCH_ERROR_ACTIONS() \
+ x(continue, 0) \
+ x(ro, 1) \
+ x(panic, 2)
+
enum bch_error_actions {
- BCH_ON_ERROR_CONTINUE = 0,
- BCH_ON_ERROR_RO = 1,
- BCH_ON_ERROR_PANIC = 2,
- BCH_NR_ERROR_ACTIONS = 3,
+#define x(t, n) BCH_ON_ERROR_##t = n,
+ BCH_ERROR_ACTIONS()
+#undef x
+ BCH_ON_ERROR_NR
};
+#define BCH_STR_HASH_TYPES() \
+ x(crc32c, 0) \
+ x(crc64, 1) \
+ x(siphash_old, 2) \
+ x(siphash, 3)
+
enum bch_str_hash_type {
- BCH_STR_HASH_CRC32C = 0,
- BCH_STR_HASH_CRC64 = 1,
- BCH_STR_HASH_SIPHASH_OLD = 2,
- BCH_STR_HASH_SIPHASH = 3,
- BCH_STR_HASH_NR = 4,
+#define x(t, n) BCH_STR_HASH_##t = n,
+ BCH_STR_HASH_TYPES()
+#undef x
+ BCH_STR_HASH_NR
};
+#define BCH_STR_HASH_OPTS() \
+ x(crc32c, 0) \
+ x(crc64, 1) \
+ x(siphash, 2)
+
enum bch_str_hash_opts {
- BCH_STR_HASH_OPT_CRC32C = 0,
- BCH_STR_HASH_OPT_CRC64 = 1,
- BCH_STR_HASH_OPT_SIPHASH = 2,
- BCH_STR_HASH_OPT_NR = 3,
+#define x(t, n) BCH_STR_HASH_OPT_##t = n,
+ BCH_STR_HASH_OPTS()
+#undef x
+ BCH_STR_HASH_OPT_NR
};
+#define BCH_CSUM_TYPES() \
+ x(none, 0) \
+ x(crc32c_nonzero, 1) \
+ x(crc64_nonzero, 2) \
+ x(chacha20_poly1305_80, 3) \
+ x(chacha20_poly1305_128, 4) \
+ x(crc32c, 5) \
+ x(crc64, 6) \
+ x(xxhash, 7)
+
enum bch_csum_type {
- BCH_CSUM_NONE = 0,
- BCH_CSUM_CRC32C_NONZERO = 1,
- BCH_CSUM_CRC64_NONZERO = 2,
- BCH_CSUM_CHACHA20_POLY1305_80 = 3,
- BCH_CSUM_CHACHA20_POLY1305_128 = 4,
- BCH_CSUM_CRC32C = 5,
- BCH_CSUM_CRC64 = 6,
- BCH_CSUM_NR = 7,
+#define x(t, n) BCH_CSUM_##t = n,
+ BCH_CSUM_TYPES()
+#undef x
+ BCH_CSUM_NR
};
-static const unsigned bch_crc_bytes[] = {
- [BCH_CSUM_NONE] = 0,
- [BCH_CSUM_CRC32C_NONZERO] = 4,
- [BCH_CSUM_CRC32C] = 4,
- [BCH_CSUM_CRC64_NONZERO] = 8,
- [BCH_CSUM_CRC64] = 8,
- [BCH_CSUM_CHACHA20_POLY1305_80] = 10,
- [BCH_CSUM_CHACHA20_POLY1305_128] = 16,
+static const __maybe_unused unsigned bch_crc_bytes[] = {
+ [BCH_CSUM_none] = 0,
+ [BCH_CSUM_crc32c_nonzero] = 4,
+ [BCH_CSUM_crc32c] = 4,
+ [BCH_CSUM_crc64_nonzero] = 8,
+ [BCH_CSUM_crc64] = 8,
+ [BCH_CSUM_xxhash] = 8,
+ [BCH_CSUM_chacha20_poly1305_80] = 10,
+ [BCH_CSUM_chacha20_poly1305_128] = 16,
};
static inline _Bool bch2_csum_type_is_encryption(enum bch_csum_type type)
{
switch (type) {
- case BCH_CSUM_CHACHA20_POLY1305_80:
- case BCH_CSUM_CHACHA20_POLY1305_128:
+ case BCH_CSUM_chacha20_poly1305_80:
+ case BCH_CSUM_chacha20_poly1305_128:
return true;
default:
return false;
}
}
+#define BCH_CSUM_OPTS() \
+ x(none, 0) \
+ x(crc32c, 1) \
+ x(crc64, 2) \
+ x(xxhash, 3)
+
enum bch_csum_opts {
- BCH_CSUM_OPT_NONE = 0,
- BCH_CSUM_OPT_CRC32C = 1,
- BCH_CSUM_OPT_CRC64 = 2,
- BCH_CSUM_OPT_NR = 3,
+#define x(t, n) BCH_CSUM_OPT_##t = n,
+ BCH_CSUM_OPTS()
+#undef x
+ BCH_CSUM_OPT_NR
};
#define BCH_COMPRESSION_TYPES() \
x(incompressible, 5)
enum bch_compression_type {
-#define x(t, n) BCH_COMPRESSION_TYPE_##t,
+#define x(t, n) BCH_COMPRESSION_TYPE_##t = n,
BCH_COMPRESSION_TYPES()
#undef x
BCH_COMPRESSION_TYPE_NR
x(zstd, 3)
enum bch_compression_opts {
-#define x(t, n) BCH_COMPRESSION_OPT_##t,
+#define x(t, n) BCH_COMPRESSION_OPT_##t = n,
BCH_COMPRESSION_OPTS()
#undef x
BCH_COMPRESSION_OPT_NR
*/
#define BCACHE_MAGIC \
- UUID_LE(0xf67385c6, 0x1a4e, 0xca45, \
- 0x82, 0x65, 0xf5, 0x7f, 0x48, 0xba, 0x6d, 0x81)
+ UUID_INIT(0xc68573f6, 0x4e1a, 0x45ca, \
+ 0x82, 0x65, 0xf5, 0x7f, 0x48, 0xba, 0x6d, 0x81)
+#define BCHFS_MAGIC \
+ UUID_INIT(0xc68573f6, 0x66ce, 0x90a9, \
+ 0xd9, 0x6a, 0x60, 0xcf, 0x80, 0x3d, 0xf7, 0xef)
#define BCACHEFS_STATFS_MAGIC 0xca451a4e
static inline __le64 __bch2_sb_magic(struct bch_sb *sb)
{
__le64 ret;
+
memcpy(&ret, &sb->uuid, sizeof(ret));
return ret;
}
x(blacklist, 3) \
x(blacklist_v2, 4) \
x(usage, 5) \
- x(data_usage, 6)
+ x(data_usage, 6) \
+ x(clock, 7) \
+ x(dev_usage, 8) \
+ x(log, 9) \
+ x(overwrite, 10) \
+ x(write_buffer_keys, 11) \
+ x(datetime, 12)
enum {
#define x(f, nr) BCH_JSET_ENTRY_##f = nr,
BCH_JSET_ENTRY_NR
};
+static inline bool jset_entry_is_key(struct jset_entry *e)
+{
+ switch (e->type) {
+ case BCH_JSET_ENTRY_btree_keys:
+ case BCH_JSET_ENTRY_btree_root:
+ case BCH_JSET_ENTRY_overwrite:
+ case BCH_JSET_ENTRY_write_buffer_keys:
+ return true;
+ }
+
+ return false;
+}
+
/*
* Journal sequence numbers can be blacklisted: bsets record the max sequence
* number of all the journal entries they contain updates for, so that on
__le64 end;
};
+#define BCH_FS_USAGE_TYPES() \
+ x(reserved, 0) \
+ x(inodes, 1) \
+ x(key_version, 2)
+
enum {
- FS_USAGE_RESERVED = 0,
- FS_USAGE_INODES = 1,
- FS_USAGE_KEY_VERSION = 2,
- FS_USAGE_NR = 3
+#define x(f, nr) BCH_FS_USAGE_##f = nr,
+ BCH_FS_USAGE_TYPES()
+#undef x
+ BCH_FS_USAGE_NR
};
struct jset_entry_usage {
struct jset_entry entry;
__le64 v;
-} __attribute__((packed));
+} __packed;
struct jset_entry_data_usage {
struct jset_entry entry;
__le64 v;
- struct bch_replicas_entry r;
-} __attribute__((packed));
+ struct bch_replicas_entry_v1 r;
+} __packed;
+
+struct jset_entry_clock {
+ struct jset_entry entry;
+ __u8 rw;
+ __u8 pad[7];
+ __le64 time;
+} __packed;
+
+struct jset_entry_dev_usage_type {
+ __le64 buckets;
+ __le64 sectors;
+ __le64 fragmented;
+} __packed;
+
+struct jset_entry_dev_usage {
+ struct jset_entry entry;
+ __le32 dev;
+ __u32 pad;
+
+ __le64 _buckets_ec; /* No longer used */
+ __le64 _buckets_unavailable; /* No longer used */
+
+ struct jset_entry_dev_usage_type d[];
+};
+
+static inline unsigned jset_entry_dev_usage_nr_types(struct jset_entry_dev_usage *u)
+{
+ return (vstruct_bytes(&u->entry) - sizeof(struct jset_entry_dev_usage)) /
+ sizeof(struct jset_entry_dev_usage_type);
+}
+
+struct jset_entry_log {
+ struct jset_entry entry;
+ u8 d[];
+} __packed __aligned(8);
+
+struct jset_entry_datetime {
+ struct jset_entry entry;
+ __le64 seconds;
+} __packed __aligned(8);
/*
* On disk format for a journal entry:
__u8 encrypted_start[0];
- __le16 read_clock;
- __le16 write_clock;
+ __le16 _read_clock; /* no longer used */
+ __le16 _write_clock;
/* Sequence number of oldest dirty journal entry */
__le64 last_seq;
- union {
- struct jset_entry start[0];
- __u64 _data[0];
- };
-} __attribute__((packed, aligned(8)));
+ struct jset_entry start[0];
+ __u64 _data[];
+} __packed __aligned(8);
LE32_BITMASK(JSET_CSUM_TYPE, struct jset, flags, 0, 4);
LE32_BITMASK(JSET_BIG_ENDIAN, struct jset, flags, 4, 5);
+LE32_BITMASK(JSET_NO_FLUSH, struct jset, flags, 5, 6);
#define BCH_JOURNAL_BUCKETS_MIN 8
/* Btree: */
-#define BCH_BTREE_IDS() \
- x(EXTENTS, 0, "extents") \
- x(INODES, 1, "inodes") \
- x(DIRENTS, 2, "dirents") \
- x(XATTRS, 3, "xattrs") \
- x(ALLOC, 4, "alloc") \
- x(QUOTAS, 5, "quotas") \
- x(EC, 6, "stripes") \
- x(REFLINK, 7, "reflink")
+enum btree_id_flags {
+ /* key size field is nonzero, btree iterators handle as ranges */
+ BTREE_ID_EXTENTS = BIT(0),
+ BTREE_ID_SNAPSHOTS = BIT(1),
+ BTREE_ID_SNAPSHOT_FIELD = BIT(2),
+ BTREE_ID_SNAPSHOTS_UNREFFED = BIT(3),
+ BTREE_ID_DATA = BIT(3),
+};
+
+#define BCH_BTREE_IDS() \
+ x(extents, 0, BTREE_ID_EXTENTS|BTREE_ID_SNAPSHOTS| \
+ BTREE_ID_SNAPSHOTS_UNREFFED|BTREE_ID_DATA,\
+ BIT_ULL(KEY_TYPE_whiteout)| \
+ BIT_ULL(KEY_TYPE_error)| \
+ BIT_ULL(KEY_TYPE_cookie)| \
+ BIT_ULL(KEY_TYPE_extent)| \
+ BIT_ULL(KEY_TYPE_reservation)| \
+ BIT_ULL(KEY_TYPE_reflink_p)| \
+ BIT_ULL(KEY_TYPE_inline_data)) \
+ x(inodes, 1, BTREE_ID_SNAPSHOTS, \
+ BIT_ULL(KEY_TYPE_whiteout)| \
+ BIT_ULL(KEY_TYPE_inode)| \
+ BIT_ULL(KEY_TYPE_inode_v2)| \
+ BIT_ULL(KEY_TYPE_inode_v3)| \
+ BIT_ULL(KEY_TYPE_inode_generation)) \
+ x(dirents, 2, BTREE_ID_SNAPSHOTS, \
+ BIT_ULL(KEY_TYPE_whiteout)| \
+ BIT_ULL(KEY_TYPE_hash_whiteout)| \
+ BIT_ULL(KEY_TYPE_dirent)) \
+ x(xattrs, 3, BTREE_ID_SNAPSHOTS|BTREE_ID_SNAPSHOTS_UNREFFED,\
+ BIT_ULL(KEY_TYPE_whiteout)| \
+ BIT_ULL(KEY_TYPE_cookie)| \
+ BIT_ULL(KEY_TYPE_hash_whiteout)| \
+ BIT_ULL(KEY_TYPE_xattr)) \
+ x(alloc, 4, 0, \
+ BIT_ULL(KEY_TYPE_alloc)| \
+ BIT_ULL(KEY_TYPE_alloc_v2)| \
+ BIT_ULL(KEY_TYPE_alloc_v3)| \
+ BIT_ULL(KEY_TYPE_alloc_v4)) \
+ x(quotas, 5, 0, \
+ BIT_ULL(KEY_TYPE_quota)) \
+ x(stripes, 6, 0, \
+ BIT_ULL(KEY_TYPE_stripe)) \
+ x(reflink, 7, BTREE_ID_EXTENTS|BTREE_ID_DATA, \
+ BIT_ULL(KEY_TYPE_reflink_v)| \
+ BIT_ULL(KEY_TYPE_indirect_inline_data)) \
+ x(subvolumes, 8, 0, \
+ BIT_ULL(KEY_TYPE_subvolume)) \
+ x(snapshots, 9, 0, \
+ BIT_ULL(KEY_TYPE_snapshot)) \
+ x(lru, 10, 0, \
+ BIT_ULL(KEY_TYPE_set)) \
+ x(freespace, 11, BTREE_ID_EXTENTS, \
+ BIT_ULL(KEY_TYPE_set)) \
+ x(need_discard, 12, 0, \
+ BIT_ULL(KEY_TYPE_set)) \
+ x(backpointers, 13, 0, \
+ BIT_ULL(KEY_TYPE_backpointer)) \
+ x(bucket_gens, 14, 0, \
+ BIT_ULL(KEY_TYPE_bucket_gens)) \
+ x(snapshot_trees, 15, 0, \
+ BIT_ULL(KEY_TYPE_snapshot_tree)) \
+ x(deleted_inodes, 16, BTREE_ID_SNAPSHOT_FIELD, \
+ BIT_ULL(KEY_TYPE_set)) \
+ x(logged_ops, 17, 0, \
+ BIT_ULL(KEY_TYPE_logged_op_truncate)| \
+ BIT_ULL(KEY_TYPE_logged_op_finsert)) \
+ x(rebalance_work, 18, BTREE_ID_SNAPSHOT_FIELD, \
+ BIT_ULL(KEY_TYPE_set)|BIT_ULL(KEY_TYPE_cookie)) \
+ x(subvolume_children, 19, 0, \
+ BIT_ULL(KEY_TYPE_set))
enum btree_id {
-#define x(kwd, val, name) BTREE_ID_##kwd = val,
+#define x(name, nr, ...) BTREE_ID_##name = nr,
BCH_BTREE_IDS()
#undef x
BTREE_ID_NR
__le16 version;
__le16 u64s; /* count of d[] in u64s */
- union {
- struct bkey_packed start[0];
- __u64 _data[0];
- };
-} __attribute__((packed, aligned(8)));
+ struct bkey_packed start[0];
+ __u64 _data[];
+} __packed __aligned(8);
LE32_BITMASK(BSET_CSUM_TYPE, struct bset, flags, 0, 4);
LE32_BITMASK(BSET_SEPARATE_WHITEOUTS,
struct bset, flags, 5, 6);
+/* Sector offset within the btree node: */
+LE32_BITMASK(BSET_OFFSET, struct bset, flags, 16, 32);
+
struct btree_node {
struct bch_csum csum;
__le64 magic;
/* Closed interval: */
struct bpos min_key;
struct bpos max_key;
- struct bch_extent_ptr ptr;
+ struct bch_extent_ptr _ptr; /* not used anymore */
struct bkey_format format;
union {
};
};
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
-LE64_BITMASK(BTREE_NODE_ID, struct btree_node, flags, 0, 4);
+LE64_BITMASK(BTREE_NODE_ID_LO, struct btree_node, flags, 0, 4);
LE64_BITMASK(BTREE_NODE_LEVEL, struct btree_node, flags, 4, 8);
LE64_BITMASK(BTREE_NODE_NEW_EXTENT_OVERWRITE,
struct btree_node, flags, 8, 9);
-/* 9-32 unused */
+LE64_BITMASK(BTREE_NODE_ID_HI, struct btree_node, flags, 9, 25);
+/* 25-32 unused */
LE64_BITMASK(BTREE_NODE_SEQ, struct btree_node, flags, 32, 64);
+static inline __u64 BTREE_NODE_ID(struct btree_node *n)
+{
+ return BTREE_NODE_ID_LO(n) | (BTREE_NODE_ID_HI(n) << 4);
+}
+
+static inline void SET_BTREE_NODE_ID(struct btree_node *n, __u64 v)
+{
+ SET_BTREE_NODE_ID_LO(n, v);
+ SET_BTREE_NODE_ID_HI(n, v >> 4);
+}
+
struct btree_node_entry {
struct bch_csum csum;
__u8 pad[22];
__le16 u64s;
__u64 _data[0];
-
};
};
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
#endif /* _BCACHEFS_FORMAT_H */
projects / bcachefs-tools-debian / blobdiff