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bcachefs: bch2_trigger_ptr() calculates sectors even when no device

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This is necessary for erasure coded pointers to devices that have been
removed.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-09-07 21:51:46 -04:00
parent 2aee59eb21
commit 934137b0c0
2 changed files with 27 additions and 16 deletions
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35
fs/bcachefs/backpointers.h
View File

@ -134,26 +134,35 @@ static inline enum bch_data_type bch2_bkey_ptr_data_type(struct bkey_s_c k,
}
}
static inline void __bch2_extent_ptr_to_bp(struct bch_fs *c, struct bch_dev *ca,
enum btree_id btree_id, unsigned level,
struct bkey_s_c k, struct extent_ptr_decoded p,
const union bch_extent_entry *entry,
struct bpos *bucket_pos, struct bch_backpointer *bp,
u64 sectors)
{
u32 bucket_offset;
*bucket_pos = PTR_BUCKET_POS_OFFSET(ca, &p.ptr, &bucket_offset);
*bp = (struct bch_backpointer) {
.btree_id = btree_id,
.level = level,
.data_type = bch2_bkey_ptr_data_type(k, p, entry),
.bucket_offset = ((u64) bucket_offset << MAX_EXTENT_COMPRESS_RATIO_SHIFT) +
p.crc.offset,
.bucket_len = sectors,
.pos = k.k->p,
};
}
static inline void bch2_extent_ptr_to_bp(struct bch_fs *c, struct bch_dev *ca,
enum btree_id btree_id, unsigned level,
struct bkey_s_c k, struct extent_ptr_decoded p,
const union bch_extent_entry *entry,
struct bpos *bucket_pos, struct bch_backpointer *bp)
{
enum bch_data_type data_type = bch2_bkey_ptr_data_type(k, p, entry);
s64 sectors = level ? btree_sectors(c) : k.k->size;
u32 bucket_offset;
u64 sectors = ptr_disk_sectors(level ? btree_sectors(c) : k.k->size, p);
*bucket_pos = PTR_BUCKET_POS_OFFSET(ca, &p.ptr, &bucket_offset);
*bp = (struct bch_backpointer) {
.btree_id = btree_id,
.level = level,
.data_type = data_type,
.bucket_offset = ((u64) bucket_offset << MAX_EXTENT_COMPRESS_RATIO_SHIFT) +
p.crc.offset,
.bucket_len = ptr_disk_sectors(sectors, p),
.pos = k.k->p,
};
__bch2_extent_ptr_to_bp(c, ca, btree_id, level, k, p, entry, bucket_pos, bp, sectors);
}
int bch2_get_next_backpointer(struct btree_trans *, struct bch_dev *ca, struct bpos, int,

8
fs/bcachefs/buckets.c
View File

@ -565,11 +565,14 @@ static int bch2_trigger_pointer(struct btree_trans *trans,
s64 *sectors,
enum btree_iter_update_trigger_flags flags)
{
struct bch_fs *c = trans->c;
bool insert = !(flags & BTREE_TRIGGER_overwrite);
struct printbuf buf = PRINTBUF;
int ret = 0;
struct bch_fs *c = trans->c;
u64 abs_sectors = ptr_disk_sectors(level ? btree_sectors(c) : k.k->size, p);
*sectors = insert ? abs_sectors : -abs_sectors;
struct bch_dev *ca = bch2_dev_tryget(c, p.ptr.dev);
if (unlikely(!ca)) {
if (insert && p.ptr.dev != BCH_SB_MEMBER_INVALID)
@ -579,8 +582,7 @@ static int bch2_trigger_pointer(struct btree_trans *trans,
struct bpos bucket;
struct bch_backpointer bp;
bch2_extent_ptr_to_bp(trans->c, ca, btree_id, level, k, p, entry, &bucket, &bp);
*sectors = insert ? bp.bucket_len : -((s64) bp.bucket_len);
__bch2_extent_ptr_to_bp(trans->c, ca, btree_id, level, k, p, entry, &bucket, &bp, abs_sectors);
if (flags & BTREE_TRIGGER_transactional) {
struct bkey_i_alloc_v4 *a = bch2_trans_start_alloc_update(trans, bucket, 0);