+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_FORMAT_H
#define _BCACHEFS_FORMAT_H
#include <asm/types.h>
#include <asm/byteorder.h>
+#include <linux/kernel.h>
#include <linux/uuid.h>
+#include "vstructs.h"
+
+#define BITMASK(name, type, field, offset, end) \
+static const unsigned name##_OFFSET = offset; \
+static const 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; \
#else
#error edit for your odd byteorder.
#endif
-} __attribute__((packed, aligned(4)));
+} __packed __aligned(4);
#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
+#define BKEY_VAL_U64s_MAX (BKEY_U64s_MAX - BKEY_U64s)
+
#define KEY_PACKED_BITS_START 24
#define KEY_FORMAT_LOCAL_BTREE 0
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 KEY(_inode, _offset, _size) \
#define bkey_bytes(_k) ((_k)->u64s * sizeof(__u64))
#define __BKEY_PADDED(key, pad) \
- struct { struct bkey_i key; __u64 key ## _pad[pad]; }
-
-#define BKEY_VAL_TYPE(name, nr) \
-struct bkey_i_##name { \
- union { \
- struct bkey k; \
- struct bkey_i k_i; \
- }; \
- struct bch_##name v; \
-}
+ struct bkey_i key; __u64 key ## _pad[pad]
/*
* - DELETED keys are used internally to mark keys that should be ignored but
* by new writes or cluster-wide GC. Node repair can also overwrite them with
* the same or a more recent version number, but not with an older version
* number.
-*/
-#define KEY_TYPE_DELETED 0
-#define KEY_TYPE_DISCARD 1
-#define KEY_TYPE_ERROR 2
-#define KEY_TYPE_COOKIE 3
-#define KEY_TYPE_PERSISTENT_DISCARD 4
-#define KEY_TYPE_GENERIC_NR 128
+ *
+ * - WHITEOUT: for hash table btrees
+ */
+#define BCH_BKEY_TYPES() \
+ x(deleted, 0) \
+ x(whiteout, 1) \
+ x(error, 2) \
+ x(cookie, 3) \
+ x(hash_whiteout, 4) \
+ x(btree_ptr, 5) \
+ x(extent, 6) \
+ x(reservation, 7) \
+ x(inode, 8) \
+ x(inode_generation, 9) \
+ x(dirent, 10) \
+ x(xattr, 11) \
+ x(alloc, 12) \
+ x(quota, 13) \
+ x(stripe, 14) \
+ x(reflink_p, 15) \
+ x(reflink_v, 16) \
+ x(inline_data, 17) \
+ x(btree_ptr_v2, 18) \
+ 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)
+
+enum bch_bkey_type {
+#define x(name, nr) KEY_TYPE_##name = nr,
+ BCH_BKEY_TYPES()
+#undef x
+ KEY_TYPE_MAX,
+};
+
+struct bch_deleted {
+ struct bch_val v;
+};
+
+struct bch_whiteout {
+ struct bch_val v;
+};
+
+struct bch_error {
+ struct bch_val v;
+};
struct bch_cookie {
struct bch_val v;
__le64 cookie;
};
-BKEY_VAL_TYPE(cookie, KEY_TYPE_COOKIE);
+
+struct bch_hash_whiteout {
+ struct bch_val v;
+};
+
+struct bch_set {
+ struct bch_val v;
+};
/* Extents */
struct bch_csum {
__le64 lo;
__le64 hi;
-} __attribute__((packed, aligned(8)));
-
-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,
-};
-
-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 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:
- return true;
- default:
- return false;
- }
-}
-
-enum bch_compression_type {
- BCH_COMPRESSION_NONE = 0,
- BCH_COMPRESSION_LZ4_OLD = 1,
- BCH_COMPRESSION_GZIP = 2,
- BCH_COMPRESSION_LZ4 = 3,
- BCH_COMPRESSION_ZSTD = 4,
- BCH_COMPRESSION_NR = 5,
-};
+} __packed __aligned(8);
#define BCH_EXTENT_ENTRY_TYPES() \
x(ptr, 0) \
x(crc32, 1) \
x(crc64, 2) \
- x(crc128, 3)
-#define BCH_EXTENT_ENTRY_MAX 4
+ 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,
_compressed_size:7,
type:2;
#endif
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
#define CRC32_SIZE_MAX (1U << 7)
#define CRC32_NONCE_MAX 0
type:3;
#endif
__u64 csum_lo;
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
#define CRC64_SIZE_MAX (1U << 9)
#define CRC64_NONCE_MAX ((1U << 10) - 1)
type:4;
#endif
struct bch_csum csum;
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
#define CRC128_SIZE_MAX (1U << 13)
#define CRC128_NONCE_MAX ((1U << 13) - 1)
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u64 type:1,
cached:1,
- erasure_coded:1,
- reservation:1,
+ unused:1,
+ unwritten:1,
offset:44, /* 8 petabytes */
dev:8,
gen:8;
__u64 gen:8,
dev:8,
offset:44,
- reservation:1,
- erasure_coded:1,
+ unwritten:1,
+ unused:1,
cached:1,
type:1;
#endif
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
-struct bch_extent_reservation {
+struct bch_extent_stripe_ptr {
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u64 type:5,
- unused:23,
+ block:8,
+ redundancy:4,
+ idx:47;
+#elif defined (__BIG_ENDIAN_BITFIELD)
+ __u64 idx:47,
+ redundancy:4,
+ 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:23,
- type:5;
+ unused:22,
+ type:6;
#endif
};
#undef x
};
-enum {
- BCH_EXTENT = 128,
+struct bch_btree_ptr {
+ struct bch_val v;
- /*
- * This is kind of a hack, we're overloading the type for a boolean that
- * really should be part of the value - BCH_EXTENT and BCH_EXTENT_CACHED
- * have the same value type:
- */
- BCH_EXTENT_CACHED = 129,
+ __u64 _data[0];
+ struct bch_extent_ptr start[];
+} __packed __aligned(8);
- /*
- * Persistent reservation:
- */
- BCH_RESERVATION = 130,
-};
+struct bch_btree_ptr_v2 {
+ struct bch_val v;
+
+ __u64 mem_ptr;
+ __le64 seq;
+ __le16 sectors_written;
+ __le16 flags;
+ struct bpos min_key;
+ __u64 _data[0];
+ struct bch_extent_ptr start[];
+} __packed __aligned(8);
+
+LE16_BITMASK(BTREE_PTR_RANGE_UPDATED, struct bch_btree_ptr_v2, flags, 0, 1);
struct bch_extent {
struct bch_val v;
- union bch_extent_entry start[0];
__u64 _data[0];
-} __attribute__((packed, aligned(8)));
-BKEY_VAL_TYPE(extent, BCH_EXTENT);
+ union bch_extent_entry start[];
+} __packed __aligned(8);
struct bch_reservation {
struct bch_val v;
__le32 generation;
__u8 nr_replicas;
__u8 pad[3];
-} __attribute__((packed, aligned(8)));
-BKEY_VAL_TYPE(reservation, BCH_RESERVATION);
+} __packed __aligned(8);
/* Maximum size (in u64s) a single pointer could be: */
#define BKEY_EXTENT_PTR_U64s_MAX\
/* Maximum possible size of an entire extent value: */
#define BKEY_EXTENT_VAL_U64s_MAX \
- (BKEY_EXTENT_PTR_U64s_MAX * (BCH_REPLICAS_MAX + 1))
-
-#define BKEY_PADDED(key) __BKEY_PADDED(key, BKEY_EXTENT_VAL_U64s_MAX)
+ (1 + BKEY_EXTENT_PTR_U64s_MAX * (BCH_REPLICAS_MAX + 1))
/* * 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_extent_ptr)) / sizeof(u64) * BCH_REPLICAS_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)
#define BCACHEFS_ROOT_INO 4096
-enum bch_inode_types {
- BCH_INODE_FS = 128,
- BCH_INODE_BLOCKDEV = 129,
- BCH_INODE_GENERATION = 130,
-};
-
struct bch_inode {
struct bch_val v;
__le32 bi_flags;
__le16 bi_mode;
__u8 fields[0];
-} __attribute__((packed, aligned(8)));
-BKEY_VAL_TYPE(inode, BCH_INODE_FS);
+} __packed __aligned(8);
+
+struct bch_inode_v2 {
+ struct bch_val v;
+
+ __le64 bi_journal_seq;
+ __le64 bi_hash_seed;
+ __le64 bi_flags;
+ __le16 bi_mode;
+ __u8 fields[0];
+} __packed __aligned(8);
+
+struct bch_inode_v3 {
+ struct bch_val v;
+
+ __le64 bi_journal_seq;
+ __le64 bi_hash_seed;
+ __le64 bi_flags;
+ __le64 bi_sectors;
+ __le64 bi_size;
+ __le64 bi_version;
+ __u8 fields[0];
+} __packed __aligned(8);
+
+#define INODEv3_FIELDS_START_INITIAL 6
+#define INODEv3_FIELDS_START_CUR (offsetof(struct bch_inode_v3, fields) / sizeof(u64))
struct bch_inode_generation {
struct bch_val v;
__le32 bi_generation;
__le32 pad;
-} __attribute__((packed, aligned(8)));
-BKEY_VAL_TYPE(inode_generation, BCH_INODE_GENERATION);
-
-#define BCH_INODE_FIELDS() \
- BCH_INODE_FIELD(bi_atime, 64) \
- BCH_INODE_FIELD(bi_ctime, 64) \
- BCH_INODE_FIELD(bi_mtime, 64) \
- BCH_INODE_FIELD(bi_otime, 64) \
- BCH_INODE_FIELD(bi_size, 64) \
- BCH_INODE_FIELD(bi_sectors, 64) \
- BCH_INODE_FIELD(bi_uid, 32) \
- BCH_INODE_FIELD(bi_gid, 32) \
- BCH_INODE_FIELD(bi_nlink, 32) \
- BCH_INODE_FIELD(bi_generation, 32) \
- BCH_INODE_FIELD(bi_dev, 32) \
- BCH_INODE_FIELD(bi_data_checksum, 8) \
- BCH_INODE_FIELD(bi_compression, 8) \
- BCH_INODE_FIELD(bi_project, 32) \
- BCH_INODE_FIELD(bi_background_compression, 8) \
- BCH_INODE_FIELD(bi_data_replicas, 8) \
- BCH_INODE_FIELD(bi_promote_target, 16) \
- BCH_INODE_FIELD(bi_foreground_target, 16) \
- BCH_INODE_FIELD(bi_background_target, 16)
-
-#define BCH_INODE_FIELDS_INHERIT() \
- BCH_INODE_FIELD(bi_data_checksum) \
- BCH_INODE_FIELD(bi_compression) \
- BCH_INODE_FIELD(bi_project) \
- BCH_INODE_FIELD(bi_background_compression) \
- BCH_INODE_FIELD(bi_data_replicas) \
- BCH_INODE_FIELD(bi_promote_target) \
- BCH_INODE_FIELD(bi_foreground_target) \
- BCH_INODE_FIELD(bi_background_target)
+} __packed __aligned(8);
+
+/*
+ * bi_subvol and bi_parent_subvol are only set for subvolume roots:
+ */
+
+#define BCH_INODE_FIELDS_v2() \
+ 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) \
+ x(bi_dir, 64) \
+ x(bi_dir_offset, 64) \
+ x(bi_subvol, 32) \
+ x(bi_parent_subvol, 32)
+
+#define BCH_INODE_FIELDS_v3() \
+ x(bi_atime, 96) \
+ x(bi_ctime, 96) \
+ x(bi_mtime, 96) \
+ x(bi_otime, 96) \
+ 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) \
+ x(bi_dir, 64) \
+ x(bi_dir_offset, 64) \
+ x(bi_subvol, 32) \
+ x(bi_parent_subvol, 32) \
+ x(bi_nocow, 8)
+
+/* 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) \
+ x(nocow, 8)
+
+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_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,
+ __BCH_INODE_I_SIZE_DIRTY = 5,
+ __BCH_INODE_I_SECTORS_DIRTY = 6,
+ __BCH_INODE_UNLINKED = 7,
+ __BCH_INODE_BACKPTR_UNTRUSTED = 8,
/* bits 20+ reserved for packed fields below: */
};
#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)
+#define BCH_INODE_BACKPTR_UNTRUSTED (1 << __BCH_INODE_BACKPTR_UNTRUSTED)
LE32_BITMASK(INODE_STR_HASH, struct bch_inode, bi_flags, 20, 24);
-LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 32);
-
-struct bch_inode_blockdev {
- struct bch_val v;
-
- __le64 i_size;
- __le64 i_flags;
+LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 31);
+LE32_BITMASK(INODE_NEW_VARINT, struct bch_inode, bi_flags, 31, 32);
- /* Seconds: */
- __le64 i_ctime;
- __le64 i_mtime;
+LE64_BITMASK(INODEv2_STR_HASH, struct bch_inode_v2, bi_flags, 20, 24);
+LE64_BITMASK(INODEv2_NR_FIELDS, struct bch_inode_v2, bi_flags, 24, 31);
- uuid_le i_uuid;
- __u8 i_label[32];
-} __attribute__((packed, aligned(8)));
-BKEY_VAL_TYPE(inode_blockdev, BCH_INODE_BLOCKDEV);
+LE64_BITMASK(INODEv3_STR_HASH, struct bch_inode_v3, bi_flags, 20, 24);
+LE64_BITMASK(INODEv3_NR_FIELDS, struct bch_inode_v3, bi_flags, 24, 31);
-/* Thin provisioned volume, or cache for another block device? */
-LE64_BITMASK(CACHED_DEV, struct bch_inode_blockdev, i_flags, 0, 1)
+LE64_BITMASK(INODEv3_FIELDS_START,
+ struct bch_inode_v3, bi_flags, 31, 36);
+LE64_BITMASK(INODEv3_MODE, struct bch_inode_v3, bi_flags, 36, 52);
/* Dirents */
* collision:
*/
-enum {
- BCH_DIRENT = 128,
- BCH_DIRENT_WHITEOUT = 129,
-};
-
struct bch_dirent {
struct bch_val v;
/* Target inode number: */
+ union {
__le64 d_inum;
+ struct { /* DT_SUBVOL */
+ __le32 d_child_subvol;
+ __le32 d_parent_subvol;
+ };
+ };
/*
* Copy of mode bits 12-15 from the target inode - so userspace can get
__u8 d_type;
__u8 d_name[];
-} __attribute__((packed, aligned(8)));
-BKEY_VAL_TYPE(dirent, BCH_DIRENT);
+} __packed __aligned(8);
-#define BCH_NAME_MAX (U8_MAX * sizeof(u64) - \
- sizeof(struct bkey) - \
- offsetof(struct bch_dirent, d_name))
+#define DT_SUBVOL 16
+#define BCH_DT_MAX 17
+#define BCH_NAME_MAX ((unsigned) (U8_MAX * sizeof(u64) - \
+ sizeof(struct bkey) - \
+ offsetof(struct bch_dirent, d_name)))
/* Xattrs */
-enum {
- BCH_XATTR = 128,
- BCH_XATTR_WHITEOUT = 129,
-};
-
-#define BCH_XATTR_INDEX_USER 0
-#define BCH_XATTR_INDEX_POSIX_ACL_ACCESS 1
-#define BCH_XATTR_INDEX_POSIX_ACL_DEFAULT 2
-#define BCH_XATTR_INDEX_TRUSTED 3
-#define BCH_XATTR_INDEX_SECURITY 4
+#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_val v;
__u8 x_name_len;
__le16 x_val_len;
__u8 x_name[];
-} __attribute__((packed, aligned(8)));
-BKEY_VAL_TYPE(xattr, BCH_XATTR);
+} __packed __aligned(8);
/* Bucket/allocation information: */
-enum {
- BCH_ALLOC = 128,
-};
+struct bch_alloc {
+ struct bch_val v;
+ __u8 fields;
+ __u8 gen;
+ __u8 data[];
+} __packed __aligned(8);
+
+#define BCH_ALLOC_FIELDS_V1() \
+ x(read_time, 16) \
+ x(write_time, 16) \
+ x(data_type, 8) \
+ x(dirty_sectors, 16) \
+ x(cached_sectors, 16) \
+ x(oldest_gen, 8) \
+ x(stripe, 32) \
+ x(stripe_redundancy, 8)
enum {
- BCH_ALLOC_FIELD_READ_TIME = 0,
- BCH_ALLOC_FIELD_WRITE_TIME = 1,
+#define x(name, _bits) BCH_ALLOC_FIELD_V1_##name,
+ BCH_ALLOC_FIELDS_V1()
+#undef x
};
-struct bch_alloc {
+struct bch_alloc_v2 {
struct bch_val v;
- __u8 fields;
+ __u8 nr_fields;
__u8 gen;
+ __u8 oldest_gen;
+ __u8 data_type;
__u8 data[];
-} __attribute__((packed, aligned(8)));
-BKEY_VAL_TYPE(alloc, BCH_ALLOC);
+} __packed __aligned(8);
-/* Quotas: */
+#define BCH_ALLOC_FIELDS_V2() \
+ x(read_time, 64) \
+ x(write_time, 64) \
+ x(dirty_sectors, 32) \
+ x(cached_sectors, 32) \
+ x(stripe, 32) \
+ x(stripe_redundancy, 8)
-enum {
- BCH_QUOTA = 128,
-};
+struct bch_alloc_v3 {
+ struct bch_val v;
+ __le64 journal_seq;
+ __le32 flags;
+ __u8 nr_fields;
+ __u8 gen;
+ __u8 oldest_gen;
+ __u8 data_type;
+ __u8 data[];
+} __packed __aligned(8);
+
+LE32_BITMASK(BCH_ALLOC_V3_NEED_DISCARD,struct bch_alloc_v3, flags, 0, 1)
+LE32_BITMASK(BCH_ALLOC_V3_NEED_INC_GEN,struct bch_alloc_v3, flags, 1, 2)
+
+struct bch_alloc_v4 {
+ struct bch_val v;
+ __u64 journal_seq;
+ __u32 flags;
+ __u8 gen;
+ __u8 oldest_gen;
+ __u8 data_type;
+ __u8 stripe_redundancy;
+ __u32 dirty_sectors;
+ __u32 cached_sectors;
+ __u64 io_time[2];
+ __u32 stripe;
+ __u32 nr_external_backpointers;
+ __u64 fragmentation_lru;
+} __packed __aligned(8);
+
+#define BCH_ALLOC_V4_U64s_V0 6
+#define BCH_ALLOC_V4_U64s (sizeof(struct bch_alloc_v4) / sizeof(u64))
+
+BITMASK(BCH_ALLOC_V4_NEED_DISCARD, struct bch_alloc_v4, flags, 0, 1)
+BITMASK(BCH_ALLOC_V4_NEED_INC_GEN, struct bch_alloc_v4, flags, 1, 2)
+BITMASK(BCH_ALLOC_V4_BACKPOINTERS_START,struct bch_alloc_v4, flags, 2, 8)
+BITMASK(BCH_ALLOC_V4_NR_BACKPOINTERS, struct bch_alloc_v4, flags, 8, 14)
+
+#define BCH_ALLOC_V4_NR_BACKPOINTERS_MAX 40
+
+struct bch_backpointer {
+ struct bch_val v;
+ __u8 btree_id;
+ __u8 level;
+ __u8 data_type;
+ __u64 bucket_offset:40;
+ __u32 bucket_len;
+ struct bpos pos;
+} __packed __aligned(8);
+
+#define KEY_TYPE_BUCKET_GENS_BITS 8
+#define KEY_TYPE_BUCKET_GENS_NR (1U << KEY_TYPE_BUCKET_GENS_BITS)
+#define KEY_TYPE_BUCKET_GENS_MASK (KEY_TYPE_BUCKET_GENS_NR - 1)
+
+struct bch_bucket_gens {
+ struct bch_val v;
+ u8 gens[KEY_TYPE_BUCKET_GENS_NR];
+} __packed __aligned(8);
+
+/* Quotas: */
enum quota_types {
QTYP_USR = 0,
struct bch_quota {
struct bch_val v;
struct bch_quota_counter c[Q_COUNTERS];
-} __attribute__((packed, aligned(8)));
-BKEY_VAL_TYPE(quota, BCH_QUOTA);
+} __packed __aligned(8);
+
+/* Erasure coding */
+
+struct bch_stripe {
+ 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[];
+} __packed __aligned(8);
+
+/* Reflink: */
+
+struct bch_reflink_p {
+ struct bch_val v;
+ __le64 idx;
+ /*
+ * A reflink pointer might point to an indirect extent which is then
+ * later split (by copygc or rebalance). If we only pointed to part of
+ * the original indirect extent, and then one of the fragments is
+ * outside the range we point to, we'd leak a refcount: so when creating
+ * reflink pointers, we need to store pad values to remember the full
+ * range we were taking a reference on.
+ */
+ __le32 front_pad;
+ __le32 back_pad;
+} __packed __aligned(8);
+
+struct bch_reflink_v {
+ struct bch_val v;
+ __le64 refcount;
+ union bch_extent_entry start[0];
+ __u64 _data[0];
+} __packed __aligned(8);
+
+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];
+};
+
+/* Subvolumes: */
+
+#define SUBVOL_POS_MIN POS(0, 1)
+#define SUBVOL_POS_MAX POS(0, S32_MAX)
+#define BCACHEFS_ROOT_SUBVOL 1
+
+struct bch_subvolume {
+ struct bch_val v;
+ __le32 flags;
+ __le32 snapshot;
+ __le64 inode;
+ __le32 parent;
+ __le32 pad;
+ bch_le128 otime;
+};
+
+LE32_BITMASK(BCH_SUBVOLUME_RO, struct bch_subvolume, flags, 0, 1)
+/*
+ * We need to know whether a subvolume is a snapshot so we can know whether we
+ * can delete it (or whether it should just be rm -rf'd)
+ */
+LE32_BITMASK(BCH_SUBVOLUME_SNAP, struct bch_subvolume, flags, 1, 2)
+LE32_BITMASK(BCH_SUBVOLUME_UNLINKED, struct bch_subvolume, flags, 2, 3)
+
+/* Snapshots */
+
+struct bch_snapshot {
+ struct bch_val v;
+ __le32 flags;
+ __le32 parent;
+ __le32 children[2];
+ __le32 subvol;
+ __le32 tree;
+};
+
+LE32_BITMASK(BCH_SNAPSHOT_DELETED, struct bch_snapshot, flags, 0, 1)
+
+/* True if a subvolume points to this snapshot node: */
+LE32_BITMASK(BCH_SNAPSHOT_SUBVOL, struct bch_snapshot, flags, 1, 2)
+
+/*
+ * Snapshot trees:
+ *
+ * The snapshot_trees btree gives us persistent indentifier for each tree of
+ * bch_snapshot nodes, and allow us to record and easily find the root/master
+ * subvolume that other snapshots were created from:
+ */
+struct bch_snapshot_tree {
+ struct bch_val v;
+ __le32 master_subvol;
+ __le32 root_snapshot;
+};
+
+/* LRU btree: */
+
+struct bch_lru {
+ struct bch_val v;
+ __le64 idx;
+} __packed __aligned(8);
+
+#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, 3) \
- x(quota, 4) \
- x(disk_groups, 5) \
- x(clean, 6)
+#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) \
+ x(journal_v2, 9) \
+ x(counters, 10)
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 {
__le64 buckets[0];
};
+struct bch_sb_field_journal_v2 {
+ struct bch_sb_field field;
+
+ struct bch_sb_field_journal_v2_entry {
+ __le64 start;
+ __le64 nr;
+ } d[0];
+};
+
/* BCH_SB_FIELD_members: */
+#define BCH_MIN_NR_NBUCKETS (1 << 6)
+
struct bch_member {
uuid_le uuid;
__le64 nbuckets; /* device size */
};
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)
+/* 4-14 unused, was TIER, HAS_(META)DATA, REPLACEMENT */
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_TIER_MAX 4U
+LE64_BITMASK(BCH_MEMBER_FREESPACE_INITIALIZED,
+ struct bch_member, flags[0], 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
-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 BCH_MEMBER_STATES() \
+ x(rw, 0) \
+ x(ro, 1) \
+ x(failed, 2) \
+ x(spare, 3)
-enum cache_replacement {
- CACHE_REPLACEMENT_LRU = 0,
- CACHE_REPLACEMENT_FIFO = 1,
- CACHE_REPLACEMENT_RANDOM = 2,
- CACHE_REPLACEMENT_NR = 3,
+enum bch_member_state {
+#define x(t, n) BCH_MEMBER_STATE_##t = n,
+ BCH_MEMBER_STATES()
+#undef x
+ BCH_MEMBER_STATE_NR
};
struct bch_sb_field_members {
/* BCH_SB_FIELD_replicas: */
+#define BCH_DATA_TYPES() \
+ x(free, 0) \
+ x(sb, 1) \
+ x(journal, 2) \
+ x(btree, 3) \
+ x(user, 4) \
+ x(cached, 5) \
+ x(parity, 6) \
+ x(stripe, 7) \
+ x(need_gc_gens, 8) \
+ x(need_discard, 9)
+
enum bch_data_type {
- BCH_DATA_NONE = 0,
- BCH_DATA_SB = 1,
- BCH_DATA_JOURNAL = 2,
- BCH_DATA_BTREE = 3,
- BCH_DATA_USER = 4,
- BCH_DATA_CACHED = 5,
- BCH_DATA_NR = 6,
+#define x(t, n) BCH_DATA_##t,
+ BCH_DATA_TYPES()
+#undef x
+ 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[];
+} __packed;
+
+struct bch_sb_field_replicas_v0 {
+ struct bch_sb_field field;
+ struct bch_replicas_entry_v0 entries[];
+} __packed __aligned(8);
+
struct bch_replicas_entry {
__u8 data_type;
__u8 nr_devs;
- __u8 devs[0];
-};
+ __u8 nr_required;
+ __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];
-};
+ struct bch_replicas_entry entries[];
+} __packed __aligned(8);
/* BCH_SB_FIELD_quota: */
struct bch_sb_field_quota {
struct bch_sb_field field;
struct bch_sb_quota_type q[QTYP_NR];
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
/* BCH_SB_FIELD_disk_groups: */
struct bch_disk_group {
__u8 label[BCH_SB_LABEL_SIZE];
__le64 flags[2];
-};
+} __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];
+} __packed __aligned(8);
+
+/* BCH_SB_FIELD_counters */
+
+#define BCH_PERSISTENT_COUNTERS() \
+ x(io_read, 0) \
+ x(io_write, 1) \
+ x(io_move, 2) \
+ x(bucket_invalidate, 3) \
+ x(bucket_discard, 4) \
+ x(bucket_alloc, 5) \
+ x(bucket_alloc_fail, 6) \
+ x(btree_cache_scan, 7) \
+ x(btree_cache_reap, 8) \
+ x(btree_cache_cannibalize, 9) \
+ x(btree_cache_cannibalize_lock, 10) \
+ x(btree_cache_cannibalize_lock_fail, 11) \
+ x(btree_cache_cannibalize_unlock, 12) \
+ x(btree_node_write, 13) \
+ x(btree_node_read, 14) \
+ x(btree_node_compact, 15) \
+ x(btree_node_merge, 16) \
+ x(btree_node_split, 17) \
+ x(btree_node_rewrite, 18) \
+ x(btree_node_alloc, 19) \
+ x(btree_node_free, 20) \
+ x(btree_node_set_root, 21) \
+ x(btree_path_relock_fail, 22) \
+ x(btree_path_upgrade_fail, 23) \
+ x(btree_reserve_get_fail, 24) \
+ x(journal_entry_full, 25) \
+ x(journal_full, 26) \
+ x(journal_reclaim_finish, 27) \
+ x(journal_reclaim_start, 28) \
+ x(journal_write, 29) \
+ x(read_promote, 30) \
+ x(read_bounce, 31) \
+ x(read_split, 33) \
+ x(read_retry, 32) \
+ x(read_reuse_race, 34) \
+ x(move_extent_read, 35) \
+ x(move_extent_write, 36) \
+ x(move_extent_finish, 37) \
+ x(move_extent_fail, 38) \
+ x(move_extent_alloc_mem_fail, 39) \
+ x(copygc, 40) \
+ x(copygc_wait, 41) \
+ x(gc_gens_end, 42) \
+ x(gc_gens_start, 43) \
+ x(trans_blocked_journal_reclaim, 44) \
+ x(trans_restart_btree_node_reused, 45) \
+ x(trans_restart_btree_node_split, 46) \
+ x(trans_restart_fault_inject, 47) \
+ x(trans_restart_iter_upgrade, 48) \
+ x(trans_restart_journal_preres_get, 49) \
+ x(trans_restart_journal_reclaim, 50) \
+ x(trans_restart_journal_res_get, 51) \
+ x(trans_restart_key_cache_key_realloced, 52) \
+ x(trans_restart_key_cache_raced, 53) \
+ x(trans_restart_mark_replicas, 54) \
+ x(trans_restart_mem_realloced, 55) \
+ x(trans_restart_memory_allocation_failure, 56) \
+ x(trans_restart_relock, 57) \
+ x(trans_restart_relock_after_fill, 58) \
+ x(trans_restart_relock_key_cache_fill, 59) \
+ x(trans_restart_relock_next_node, 60) \
+ x(trans_restart_relock_parent_for_fill, 61) \
+ x(trans_restart_relock_path, 62) \
+ x(trans_restart_relock_path_intent, 63) \
+ x(trans_restart_too_many_iters, 64) \
+ x(trans_restart_traverse, 65) \
+ x(trans_restart_upgrade, 66) \
+ x(trans_restart_would_deadlock, 67) \
+ x(trans_restart_would_deadlock_write, 68) \
+ x(trans_restart_injected, 69) \
+ x(trans_restart_key_cache_upgrade, 70) \
+ x(trans_traverse_all, 71) \
+ x(transaction_commit, 72) \
+ x(write_super, 73) \
+ x(trans_restart_would_deadlock_recursion_limit, 74) \
+ x(trans_restart_write_buffer_flush, 75) \
+ x(trans_restart_split_race, 76)
+
+enum bch_persistent_counters {
+#define x(t, n, ...) BCH_COUNTER_##t,
+ BCH_PERSISTENT_COUNTERS()
+#undef x
+ BCH_COUNTER_NR
+};
+
+struct bch_sb_field_counters {
+ struct bch_sb_field field;
+ __le64 d[0];
};
/*
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 journal_seq_blacklist_entry {
+ __le64 start;
+ __le64 end;
+};
+
+struct bch_sb_field_journal_seq_blacklist {
+ struct bch_sb_field field;
+
+ union {
+ struct journal_seq_blacklist_entry start[0];
+ __u64 _data[0];
+ };
+};
+
/* Superblock: */
/*
- * Version 8: BCH_SB_ENCODED_EXTENT_MAX_BITS
- * BCH_MEMBER_DATA_ALLOWED
- * Version 9: incompatible extent nonce change
+ * New versioning scheme:
+ * 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_METADATA_VERSIONS() \
+ x(bkey_renumber, 10) \
+ x(inode_btree_change, 11) \
+ x(snapshot, 12) \
+ x(inode_backpointers, 13) \
+ x(btree_ptr_sectors_written, 14) \
+ x(snapshot_2, 15) \
+ x(reflink_p_fix, 16) \
+ x(subvol_dirent, 17) \
+ x(inode_v2, 18) \
+ x(freespace, 19) \
+ x(alloc_v4, 20) \
+ x(new_data_types, 21) \
+ x(backpointers, 22) \
+ x(inode_v3, 23) \
+ x(unwritten_extents, 24) \
+ x(bucket_gens, 25) \
+ x(lru_v2, 26) \
+ x(fragmentation_lru, 27) \
+ x(no_bps_in_alloc_keys, 28) \
+ x(snapshot_trees, 29)
+
+enum bcachefs_metadata_version {
+ 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 unsigned bcachefs_metadata_required_upgrade_below = bcachefs_metadata_version_snapshot_trees;
-#define BCH_SB_VERSION_MIN 7
-#define BCH_SB_VERSION_EXTENT_MAX 8
-#define BCH_SB_VERSION_EXTENT_NONCE_V1 9
-#define BCH_SB_VERSION_MAX 9
+#define bcachefs_metadata_version_current (bcachefs_metadata_version_max - 1)
#define BCH_SB_SECTOR 8
#define BCH_SB_MEMBERS_MAX 64 /* XXX kill */
__u8 nr_superblocks;
__u8 pad[5];
__le64 sb_offset[61];
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
#define BCH_SB_LAYOUT_SECTOR 7
/*
* @offset - sector where this sb was written
* @version - on disk format version
- * @magic - identifies as a bcachefs superblock (BCACHE_MAGIC)
+ * @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 (BCHFS_MAGIC)
* @seq - incremented each time superblock is written
* @uuid - used for generating various magic numbers and identifying
* member devices, never changes
*/
struct bch_sb {
struct bch_csum csum;
- __le64 version;
+ __le16 version;
+ __le16 version_min;
+ __le16 pad[2];
uuid_le magic;
uuid_le uuid;
uuid_le user_uuid;
struct bch_sb_field start[0];
__le64 _data[0];
};
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
/*
* Flags:
LE64_BITMASK(BCH_SB_GRPQUOTA, struct bch_sb, flags[0], 58, 59);
LE64_BITMASK(BCH_SB_PRJQUOTA, struct bch_sb, flags[0], 59, 60);
-/* 60-64 unused */
+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_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);
struct bch_sb, flags[2], 0, 4);
LE64_BITMASK(BCH_SB_GC_RESERVE_BYTES, struct bch_sb, flags[2], 4, 64);
-/* Features: */
-enum bch_sb_features {
- BCH_FEATURE_LZ4 = 0,
- BCH_FEATURE_GZIP = 1,
- BCH_FEATURE_ZSTD = 2,
- BCH_FEATURE_ATOMIC_NLINK = 3,
+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);
+
+/*
+ * 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_extent_overwrite: gates BTREE_NODE_NEW_EXTENT_OVERWRITE
+ */
+#define BCH_SB_FEATURES() \
+ x(lz4, 0) \
+ x(gzip, 1) \
+ x(zstd, 2) \
+ x(atomic_nlink, 3) \
+ x(ec, 4) \
+ x(journal_seq_blacklist_v3, 5) \
+ x(reflink, 6) \
+ x(new_siphash, 7) \
+ x(inline_data, 8) \
+ x(new_extent_overwrite, 9) \
+ x(incompressible, 10) \
+ x(btree_ptr_v2, 11) \
+ x(extents_above_btree_updates, 12) \
+ x(btree_updates_journalled, 13) \
+ x(reflink_inline_data, 14) \
+ 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 \
+ (BCH_SB_FEATURES_ALWAYS| \
+ (1ULL << BCH_FEATURE_new_siphash)| \
+ (1ULL << BCH_FEATURE_btree_ptr_v2)| \
+ (1ULL << BCH_FEATURE_new_varint)| \
+ (1ULL << BCH_FEATURE_journal_no_flush))
+
+enum bch_sb_feature {
+#define x(f, n) BCH_FEATURE_##f,
+ BCH_SB_FEATURES()
+#undef x
+ 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 {
+#define x(f, n) BCH_COMPAT_##f,
+ BCH_SB_COMPAT()
+#undef x
+ BCH_COMPAT_NR,
};
/* options: */
#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
};
-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 BCH_STR_HASH_TYPES() \
+ x(crc32c, 0) \
+ x(crc64, 1) \
+ x(siphash_old, 2) \
+ x(siphash, 3)
+
+enum bch_str_hash_type {
+#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_CRC32C = 0,
- BCH_STR_HASH_CRC64 = 1,
- BCH_STR_HASH_SIPHASH = 2,
- BCH_STR_HASH_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 {
+#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_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:
+ 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 {
+#define x(t, n) BCH_CSUM_OPT_##t = n,
+ BCH_CSUM_OPTS()
+#undef x
+ BCH_CSUM_OPT_NR
};
#define BCH_COMPRESSION_TYPES() \
- x(NONE) \
- x(LZ4) \
- x(GZIP) \
- x(ZSTD)
+ x(none, 0) \
+ x(lz4_old, 1) \
+ x(gzip, 2) \
+ x(lz4, 3) \
+ x(zstd, 4) \
+ x(incompressible, 5)
-enum bch_compression_opts {
-#define x(t) BCH_COMPRESSION_OPT_##t,
+enum bch_compression_type {
+#define x(t, n) BCH_COMPRESSION_TYPE_##t = n,
BCH_COMPRESSION_TYPES()
+#undef x
+ BCH_COMPRESSION_TYPE_NR
+};
+
+#define BCH_COMPRESSION_OPTS() \
+ x(none, 0) \
+ x(lz4, 1) \
+ x(gzip, 2) \
+ x(zstd, 3)
+
+enum bch_compression_opts {
+#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)
+#define BCHFS_MAGIC \
+ UUID_LE(0xf67385c6, 0xce66, 0xa990, \
+ 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;
}
/* Journal */
-#define BCACHE_JSET_VERSION_UUIDv1 1
-#define BCACHE_JSET_VERSION_UUID 1 /* Always latest UUID format */
-#define BCACHE_JSET_VERSION_JKEYS 2
-#define BCACHE_JSET_VERSION 2
-
#define JSET_KEYS_U64s (sizeof(struct jset_entry) / sizeof(__u64))
#define BCH_JSET_ENTRY_TYPES() \
x(btree_root, 1) \
x(prio_ptrs, 2) \
x(blacklist, 3) \
- x(blacklist_v2, 4)
+ x(blacklist_v2, 4) \
+ x(usage, 5) \
+ x(data_usage, 6) \
+ x(clock, 7) \
+ x(dev_usage, 8) \
+ x(log, 9) \
+ x(overwrite, 10)
enum {
#define x(f, nr) BCH_JSET_ENTRY_##f = nr,
__le64 end;
};
+#define BCH_FS_USAGE_TYPES() \
+ x(reserved, 0) \
+ x(inodes, 1) \
+ x(key_version, 2)
+
+enum {
+#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;
+} __packed;
+
+struct jset_entry_data_usage {
+ struct jset_entry entry;
+ __le64 v;
+ struct bch_replicas_entry 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;
+ __le64 _buckets_unavailable; /* No longer used */
+
+ struct jset_entry_dev_usage_type d[];
+} __packed;
+
+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;
+
/*
* On disk format for a journal entry:
* seq is monotonically increasing; every journal entry has its own unique
__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;
struct jset_entry start[0];
__u64 _data[0];
};
-} __attribute__((packed, aligned(8)));
+} __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 20
+#define BCH_JOURNAL_BUCKETS_MIN 8
/* Btree: */
-#define DEFINE_BCH_BTREE_IDS() \
- DEF_BTREE_ID(EXTENTS, 0, "extents") \
- DEF_BTREE_ID(INODES, 1, "inodes") \
- DEF_BTREE_ID(DIRENTS, 2, "dirents") \
- DEF_BTREE_ID(XATTRS, 3, "xattrs") \
- DEF_BTREE_ID(ALLOC, 4, "alloc") \
- DEF_BTREE_ID(QUOTAS, 5, "quotas")
-
-#define DEF_BTREE_ID(kwd, val, name) BTREE_ID_##kwd = val,
+#define BCH_BTREE_IDS() \
+ x(extents, 0) \
+ x(inodes, 1) \
+ x(dirents, 2) \
+ x(xattrs, 3) \
+ x(alloc, 4) \
+ x(quotas, 5) \
+ x(stripes, 6) \
+ x(reflink, 7) \
+ x(subvolumes, 8) \
+ x(snapshots, 9) \
+ x(lru, 10) \
+ x(freespace, 11) \
+ x(need_discard, 12) \
+ x(backpointers, 13) \
+ x(bucket_gens, 14) \
+ x(snapshot_trees, 15)
enum btree_id {
- DEFINE_BCH_BTREE_IDS()
+#define x(kwd, val) BTREE_ID_##kwd = val,
+ BCH_BTREE_IDS()
+#undef x
BTREE_ID_NR
};
-#undef DEF_BTREE_ID
-
#define BTREE_MAX_DEPTH 4U
/* Btree nodes */
-/* Version 1: Seed pointer into btree node checksum
- */
-#define BCACHE_BSET_CSUM 1
-#define BCACHE_BSET_KEY_v1 2
-#define BCACHE_BSET_JOURNAL_SEQ 3
-#define BCACHE_BSET_VERSION 3
-
/*
* Btree nodes
*
struct bkey_packed start[0];
__u64 _data[0];
};
-} __attribute__((packed, aligned(8)));
+} __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_LEVEL, struct btree_node, flags, 4, 8);
-/* 8-32 unused */
+LE64_BITMASK(BTREE_NODE_NEW_EXTENT_OVERWRITE,
+ struct btree_node, flags, 8, 9);
+/* 9-32 unused */
LE64_BITMASK(BTREE_NODE_SEQ, struct btree_node, flags, 32, 64);
struct btree_node_entry {
};
};
-} __attribute__((packed, aligned(8)));
+} __packed __aligned(8);
#endif /* _BCACHEFS_FORMAT_H */
projects / bcachefs-tools-debian / blobdiff