linux/fs/bcachefs/extents.h
Kent Overstreet 7ef2a73a58 bcachefs: Fix check for if extent update is allocating
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-22 17:08:14 -04:00

579 lines
16 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_EXTENTS_H
#define _BCACHEFS_EXTENTS_H
#include "bcachefs.h"
#include "bkey.h"
#include "extents_types.h"
struct bch_fs;
struct btree_insert;
struct btree_insert_entry;
/* extent entries: */
#define extent_entry_last(_e) bkey_val_end(_e)
#define entry_to_ptr(_entry) \
({ \
EBUG_ON((_entry) && !extent_entry_is_ptr(_entry)); \
\
__builtin_choose_expr( \
type_is_exact(_entry, const union bch_extent_entry *), \
(const struct bch_extent_ptr *) (_entry), \
(struct bch_extent_ptr *) (_entry)); \
})
/* downcast, preserves const */
#define to_entry(_entry) \
({ \
BUILD_BUG_ON(!type_is(_entry, union bch_extent_crc *) && \
!type_is(_entry, struct bch_extent_ptr *) && \
!type_is(_entry, struct bch_extent_stripe_ptr *)); \
\
__builtin_choose_expr( \
(type_is_exact(_entry, const union bch_extent_crc *) || \
type_is_exact(_entry, const struct bch_extent_ptr *) ||\
type_is_exact(_entry, const struct bch_extent_stripe_ptr *)),\
(const union bch_extent_entry *) (_entry), \
(union bch_extent_entry *) (_entry)); \
})
static inline unsigned
__extent_entry_type(const union bch_extent_entry *e)
{
return e->type ? __ffs(e->type) : BCH_EXTENT_ENTRY_MAX;
}
static inline enum bch_extent_entry_type
extent_entry_type(const union bch_extent_entry *e)
{
int ret = __ffs(e->type);
EBUG_ON(ret < 0 || ret >= BCH_EXTENT_ENTRY_MAX);
return ret;
}
static inline size_t extent_entry_bytes(const union bch_extent_entry *entry)
{
switch (extent_entry_type(entry)) {
#define x(f, n) \
case BCH_EXTENT_ENTRY_##f: \
return sizeof(struct bch_extent_##f);
BCH_EXTENT_ENTRY_TYPES()
#undef x
default:
BUG();
}
}
static inline size_t extent_entry_u64s(const union bch_extent_entry *entry)
{
return extent_entry_bytes(entry) / sizeof(u64);
}
static inline bool extent_entry_is_ptr(const union bch_extent_entry *e)
{
switch (extent_entry_type(e)) {
case BCH_EXTENT_ENTRY_ptr:
return true;
default:
return false;
}
}
static inline bool extent_entry_is_crc(const union bch_extent_entry *e)
{
switch (extent_entry_type(e)) {
case BCH_EXTENT_ENTRY_crc32:
case BCH_EXTENT_ENTRY_crc64:
case BCH_EXTENT_ENTRY_crc128:
return true;
default:
return false;
}
}
union bch_extent_crc {
u8 type;
struct bch_extent_crc32 crc32;
struct bch_extent_crc64 crc64;
struct bch_extent_crc128 crc128;
};
#define __entry_to_crc(_entry) \
__builtin_choose_expr( \
type_is_exact(_entry, const union bch_extent_entry *), \
(const union bch_extent_crc *) (_entry), \
(union bch_extent_crc *) (_entry))
#define entry_to_crc(_entry) \
({ \
EBUG_ON((_entry) && !extent_entry_is_crc(_entry)); \
\
__entry_to_crc(_entry); \
})
static inline struct bch_extent_crc_unpacked
bch2_extent_crc_unpack(const struct bkey *k, const union bch_extent_crc *crc)
{
#define common_fields(_crc) \
.csum_type = _crc.csum_type, \
.compression_type = _crc.compression_type, \
.compressed_size = _crc._compressed_size + 1, \
.uncompressed_size = _crc._uncompressed_size + 1, \
.offset = _crc.offset, \
.live_size = k->size
if (!crc)
return (struct bch_extent_crc_unpacked) {
.compressed_size = k->size,
.uncompressed_size = k->size,
.live_size = k->size,
};
switch (extent_entry_type(to_entry(crc))) {
case BCH_EXTENT_ENTRY_crc32: {
struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
common_fields(crc->crc32),
};
*((__le32 *) &ret.csum.lo) = crc->crc32.csum;
memcpy(&ret.csum.lo, &crc->crc32.csum,
sizeof(crc->crc32.csum));
return ret;
}
case BCH_EXTENT_ENTRY_crc64: {
struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
common_fields(crc->crc64),
.nonce = crc->crc64.nonce,
.csum.lo = (__force __le64) crc->crc64.csum_lo,
};
*((__le16 *) &ret.csum.hi) = crc->crc64.csum_hi;
return ret;
}
case BCH_EXTENT_ENTRY_crc128: {
struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
common_fields(crc->crc128),
.nonce = crc->crc128.nonce,
.csum = crc->crc128.csum,
};
return ret;
}
default:
BUG();
}
#undef common_fields
}
/* bkey_ptrs: generically over any key type that has ptrs */
struct bkey_ptrs_c {
const union bch_extent_entry *start;
const union bch_extent_entry *end;
};
struct bkey_ptrs {
union bch_extent_entry *start;
union bch_extent_entry *end;
};
/* iterate over bkey ptrs */
#define extent_entry_next(_entry) \
((typeof(_entry)) ((void *) (_entry) + extent_entry_bytes(_entry)))
#define __bkey_extent_entry_for_each_from(_start, _end, _entry) \
for ((_entry) = (_start); \
(_entry) < (_end); \
(_entry) = extent_entry_next(_entry))
#define __bkey_ptr_next(_ptr, _end) \
({ \
typeof(_end) _entry; \
\
__bkey_extent_entry_for_each_from(to_entry(_ptr), _end, _entry) \
if (extent_entry_is_ptr(_entry)) \
break; \
\
_entry < (_end) ? entry_to_ptr(_entry) : NULL; \
})
#define bkey_extent_entry_for_each_from(_p, _entry, _start) \
__bkey_extent_entry_for_each_from(_start, (_p).end, _entry)
#define bkey_extent_entry_for_each(_p, _entry) \
bkey_extent_entry_for_each_from(_p, _entry, _p.start)
#define __bkey_for_each_ptr(_start, _end, _ptr) \
for ((_ptr) = (_start); \
((_ptr) = __bkey_ptr_next(_ptr, _end)); \
(_ptr)++)
#define bkey_ptr_next(_p, _ptr) \
__bkey_ptr_next(_ptr, (_p).end)
#define bkey_for_each_ptr(_p, _ptr) \
__bkey_for_each_ptr(&(_p).start->ptr, (_p).end, _ptr)
#define __bkey_ptr_next_decode(_k, _end, _ptr, _entry) \
({ \
__label__ out; \
\
(_ptr).idx = 0; \
(_ptr).ec_nr = 0; \
\
__bkey_extent_entry_for_each_from(_entry, _end, _entry) \
switch (extent_entry_type(_entry)) { \
case BCH_EXTENT_ENTRY_ptr: \
(_ptr).ptr = _entry->ptr; \
goto out; \
case BCH_EXTENT_ENTRY_crc32: \
case BCH_EXTENT_ENTRY_crc64: \
case BCH_EXTENT_ENTRY_crc128: \
(_ptr).crc = bch2_extent_crc_unpack(_k, \
entry_to_crc(_entry)); \
break; \
case BCH_EXTENT_ENTRY_stripe_ptr: \
(_ptr).ec[(_ptr).ec_nr++] = _entry->stripe_ptr; \
break; \
} \
out: \
_entry < (_end); \
})
#define __bkey_for_each_ptr_decode(_k, _start, _end, _ptr, _entry) \
for ((_ptr).crc = bch2_extent_crc_unpack(_k, NULL), \
(_entry) = _start; \
__bkey_ptr_next_decode(_k, _end, _ptr, _entry); \
(_entry) = extent_entry_next(_entry))
#define bkey_for_each_ptr_decode(_k, _p, _ptr, _entry) \
__bkey_for_each_ptr_decode(_k, (_p).start, (_p).end, \
_ptr, _entry)
/* utility code common to all keys with pointers: */
static inline struct bkey_ptrs_c bch2_bkey_ptrs_c(struct bkey_s_c k)
{
switch (k.k->type) {
case KEY_TYPE_btree_ptr: {
struct bkey_s_c_btree_ptr e = bkey_s_c_to_btree_ptr(k);
return (struct bkey_ptrs_c) {
to_entry(&e.v->start[0]),
to_entry(bkey_val_end(e))
};
}
case KEY_TYPE_extent: {
struct bkey_s_c_extent e = bkey_s_c_to_extent(k);
return (struct bkey_ptrs_c) {
e.v->start,
extent_entry_last(e)
};
}
case KEY_TYPE_stripe: {
struct bkey_s_c_stripe s = bkey_s_c_to_stripe(k);
return (struct bkey_ptrs_c) {
to_entry(&s.v->ptrs[0]),
to_entry(&s.v->ptrs[s.v->nr_blocks]),
};
}
default:
return (struct bkey_ptrs_c) { NULL, NULL };
}
}
static inline struct bkey_ptrs bch2_bkey_ptrs(struct bkey_s k)
{
struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k.s_c);
return (struct bkey_ptrs) {
(void *) p.start,
(void *) p.end
};
}
static inline struct bch_devs_list bch2_bkey_devs(struct bkey_s_c k)
{
struct bch_devs_list ret = (struct bch_devs_list) { 0 };
struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
const struct bch_extent_ptr *ptr;
bkey_for_each_ptr(p, ptr)
ret.devs[ret.nr++] = ptr->dev;
return ret;
}
static inline struct bch_devs_list bch2_bkey_dirty_devs(struct bkey_s_c k)
{
struct bch_devs_list ret = (struct bch_devs_list) { 0 };
struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
const struct bch_extent_ptr *ptr;
bkey_for_each_ptr(p, ptr)
if (!ptr->cached)
ret.devs[ret.nr++] = ptr->dev;
return ret;
}
static inline struct bch_devs_list bch2_bkey_cached_devs(struct bkey_s_c k)
{
struct bch_devs_list ret = (struct bch_devs_list) { 0 };
struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
const struct bch_extent_ptr *ptr;
bkey_for_each_ptr(p, ptr)
if (ptr->cached)
ret.devs[ret.nr++] = ptr->dev;
return ret;
}
static inline bool bch2_bkey_has_device(struct bkey_s_c k, unsigned dev)
{
struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
const struct bch_extent_ptr *ptr;
bkey_for_each_ptr(p, ptr)
if (ptr->dev == dev)
return ptr;
return NULL;
}
unsigned bch2_bkey_nr_ptrs(struct bkey_s_c);
unsigned bch2_bkey_nr_dirty_ptrs(struct bkey_s_c);
unsigned bch2_bkey_durability(struct bch_fs *, struct bkey_s_c);
void bch2_mark_io_failure(struct bch_io_failures *,
struct extent_ptr_decoded *);
int bch2_bkey_pick_read_device(struct bch_fs *, struct bkey_s_c,
struct bch_io_failures *,
struct extent_ptr_decoded *);
/* bch_btree_ptr: */
const char *bch2_btree_ptr_invalid(const struct bch_fs *, struct bkey_s_c);
void bch2_btree_ptr_debugcheck(struct bch_fs *, struct btree *,
struct bkey_s_c);
void bch2_btree_ptr_to_text(struct printbuf *, struct bch_fs *,
struct bkey_s_c);
void bch2_ptr_swab(const struct bkey_format *, struct bkey_packed *);
#define bch2_bkey_ops_btree_ptr (struct bkey_ops) { \
.key_invalid = bch2_btree_ptr_invalid, \
.key_debugcheck = bch2_btree_ptr_debugcheck, \
.val_to_text = bch2_btree_ptr_to_text, \
.swab = bch2_ptr_swab, \
}
/* bch_extent: */
const char *bch2_extent_invalid(const struct bch_fs *, struct bkey_s_c);
void bch2_extent_debugcheck(struct bch_fs *, struct btree *, struct bkey_s_c);
void bch2_extent_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
bool bch2_extent_normalize(struct bch_fs *, struct bkey_s);
enum merge_result bch2_extent_merge(struct bch_fs *,
struct bkey_i *, struct bkey_i *);
#define bch2_bkey_ops_extent (struct bkey_ops) { \
.key_invalid = bch2_extent_invalid, \
.key_debugcheck = bch2_extent_debugcheck, \
.val_to_text = bch2_extent_to_text, \
.swab = bch2_ptr_swab, \
.key_normalize = bch2_extent_normalize, \
.key_merge = bch2_extent_merge, \
}
/* bch_reservation: */
const char *bch2_reservation_invalid(const struct bch_fs *, struct bkey_s_c);
void bch2_reservation_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
enum merge_result bch2_reservation_merge(struct bch_fs *,
struct bkey_i *, struct bkey_i *);
#define bch2_bkey_ops_reservation (struct bkey_ops) { \
.key_invalid = bch2_reservation_invalid, \
.val_to_text = bch2_reservation_to_text, \
.key_merge = bch2_reservation_merge, \
}
void bch2_extent_trim_atomic(struct bkey_i *, struct btree_iter *);
static inline bool bch2_extent_is_atomic(struct bkey *k,
struct btree_iter *iter)
{
struct btree *b = iter->l[0].b;
return bkey_cmp(k->p, b->key.k.p) <= 0 &&
bkey_cmp(bkey_start_pos(k), b->data->min_key) >= 0;
}
enum btree_insert_ret
bch2_extent_can_insert(struct btree_insert *, struct btree_insert_entry *,
unsigned *);
enum btree_insert_ret
bch2_insert_fixup_extent(struct btree_insert *, struct btree_insert_entry *);
void bch2_extent_mark_replicas_cached(struct bch_fs *, struct bkey_s_extent,
unsigned, unsigned);
const struct bch_extent_ptr *
bch2_extent_has_device(struct bkey_s_c_extent, unsigned);
const struct bch_extent_ptr *
bch2_extent_has_group(struct bch_fs *, struct bkey_s_c_extent, unsigned);
const struct bch_extent_ptr *
bch2_extent_has_target(struct bch_fs *, struct bkey_s_c_extent, unsigned);
unsigned bch2_extent_is_compressed(struct bkey_s_c);
bool bch2_extent_matches_ptr(struct bch_fs *, struct bkey_s_c_extent,
struct bch_extent_ptr, u64);
static inline bool bkey_extent_is_data(const struct bkey *k)
{
switch (k->type) {
case KEY_TYPE_btree_ptr:
case KEY_TYPE_extent:
return true;
default:
return false;
}
}
static inline bool bkey_extent_is_allocation(const struct bkey *k)
{
switch (k->type) {
case KEY_TYPE_extent:
case KEY_TYPE_reservation:
return true;
default:
return false;
}
}
static inline bool bch2_extent_is_fully_allocated(struct bkey_s_c k)
{
return bkey_extent_is_allocation(k.k) &&
!bch2_extent_is_compressed(k);
}
void bch2_bkey_append_ptr(struct bkey_i *, struct bch_extent_ptr);
void bch2_bkey_drop_device(struct bkey_s, unsigned);
/* Extent entry iteration: */
#define extent_for_each_entry_from(_e, _entry, _start) \
__bkey_extent_entry_for_each_from(_start, \
extent_entry_last(_e),_entry)
#define extent_for_each_entry(_e, _entry) \
extent_for_each_entry_from(_e, _entry, (_e).v->start)
#define extent_ptr_next(_e, _ptr) \
__bkey_ptr_next(_ptr, extent_entry_last(_e))
#define extent_for_each_ptr(_e, _ptr) \
__bkey_for_each_ptr(&(_e).v->start->ptr, extent_entry_last(_e), _ptr)
#define extent_crc_next(_e, _crc, _iter) \
({ \
extent_for_each_entry_from(_e, _iter, _iter) \
if (extent_entry_is_crc(_iter)) { \
(_crc) = bch2_extent_crc_unpack((_e).k, entry_to_crc(_iter));\
break; \
} \
\
(_iter) < extent_entry_last(_e); \
})
#define extent_for_each_crc(_e, _crc, _iter) \
for ((_crc) = bch2_extent_crc_unpack((_e).k, NULL), \
(_iter) = (_e).v->start; \
extent_crc_next(_e, _crc, _iter); \
(_iter) = extent_entry_next(_iter))
#define extent_for_each_ptr_decode(_e, _ptr, _entry) \
__bkey_for_each_ptr_decode((_e).k, (_e).v->start, \
extent_entry_last(_e), _ptr, _entry)
void bch2_extent_crc_append(struct bkey_i_extent *,
struct bch_extent_crc_unpacked);
void bch2_extent_ptr_decoded_append(struct bkey_i_extent *,
struct extent_ptr_decoded *);
static inline void __extent_entry_push(struct bkey_i_extent *e)
{
union bch_extent_entry *entry = extent_entry_last(extent_i_to_s(e));
EBUG_ON(bkey_val_u64s(&e->k) + extent_entry_u64s(entry) >
BKEY_EXTENT_VAL_U64s_MAX);
e->k.u64s += extent_entry_u64s(entry);
}
bool bch2_can_narrow_extent_crcs(struct bkey_s_c_extent,
struct bch_extent_crc_unpacked);
bool bch2_extent_narrow_crcs(struct bkey_i_extent *, struct bch_extent_crc_unpacked);
union bch_extent_entry *bch2_bkey_drop_ptr(struct bkey_s,
struct bch_extent_ptr *);
#define bch2_bkey_drop_ptrs(_k, _ptr, _cond) \
do { \
struct bkey_ptrs _ptrs = bch2_bkey_ptrs(_k); \
\
_ptr = &_ptrs.start->ptr; \
\
while ((_ptr = bkey_ptr_next(_ptrs, _ptr))) { \
if (_cond) { \
_ptr = (void *) bch2_bkey_drop_ptr(_k, _ptr); \
_ptrs = bch2_bkey_ptrs(_k); \
continue; \
} \
\
(_ptr)++; \
} \
} while (0)
bool __bch2_cut_front(struct bpos, struct bkey_s);
static inline bool bch2_cut_front(struct bpos where, struct bkey_i *k)
{
return __bch2_cut_front(where, bkey_i_to_s(k));
}
bool bch2_cut_back(struct bpos, struct bkey *);
void bch2_key_resize(struct bkey *, unsigned);
/*
* In extent_sort_fix_overlapping(), insert_fixup_extent(),
* extent_merge_inline() - we're modifying keys in place that are packed. To do
* that we have to unpack the key, modify the unpacked key - then this
* copies/repacks the unpacked to the original as necessary.
*/
static inline void extent_save(struct btree *b, struct bkey_packed *dst,
struct bkey *src)
{
struct bkey_format *f = &b->format;
struct bkey_i *dst_unpacked;
if ((dst_unpacked = packed_to_bkey(dst)))
dst_unpacked->k = *src;
else
BUG_ON(!bch2_bkey_pack_key(dst, src, f));
}
bool bch2_check_range_allocated(struct bch_fs *, struct bpos, u64, unsigned);
unsigned bch2_bkey_nr_ptrs_allocated(struct bkey_s_c);
#endif /* _BCACHEFS_EXTENTS_H */