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bcachefs: Fix gc handling of bucket gens

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2019-02-20 17:57:06 -05:00 committed by Kent Overstreet
parent 86a225c42d
commit 28062d320b
2 changed files with 13 additions and 8 deletions
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19
fs/bcachefs/btree_gc.c
View File

@ -142,22 +142,23 @@ static int bch2_gc_mark_key(struct bch_fs *c, struct bkey_s_c k,
bkey_for_each_ptr(ptrs, ptr) {
struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev);
struct bucket *g = PTR_BUCKET(ca, ptr, true);
struct bucket *g2 = PTR_BUCKET(ca, ptr, false);
if (mustfix_fsck_err_on(!g->gen_valid, c,
"found ptr with missing gen in alloc btree,\n"
"type %u gen %u",
k.k->type, ptr->gen)) {
g->_mark.gen = ptr->gen;
g->_mark.dirty = true;
g->gen_valid = 1;
g2->_mark.gen = g->_mark.gen = ptr->gen;
g2->_mark.dirty = g->_mark.dirty = true;
g2->gen_valid = g->gen_valid = true;
}
if (mustfix_fsck_err_on(gen_cmp(ptr->gen, g->mark.gen) > 0, c,
"%u ptr gen in the future: %u > %u",
k.k->type, ptr->gen, g->mark.gen)) {
g->_mark.gen = ptr->gen;
g->_mark.dirty = true;
g->gen_valid = 1;
g2->_mark.gen = g->_mark.gen = ptr->gen;
g2->_mark.dirty = g->_mark.dirty = true;
g2->gen_valid = g->gen_valid = true;
set_bit(BCH_FS_FIXED_GENS, &c->flags);
}
}
@ -692,10 +693,12 @@ static int bch2_gc_start(struct bch_fs *c)
dst->first_bucket = src->first_bucket;
dst->nbuckets = src->nbuckets;
for (b = 0; b < src->nbuckets; b++)
for (b = 0; b < src->nbuckets; b++) {
dst->b[b]._mark.gen =
dst->b[b].oldest_gen =
src->b[b].mark.gen;
dst->b[b].gen_valid = src->b[b].gen_valid;
}
};
percpu_up_write(&c->mark_lock);
@ -754,6 +757,8 @@ out:
if (iter++ <= 2) {
bch_info(c, "Fixed gens, restarting mark and sweep:");
clear_bit(BCH_FS_FIXED_GENS, &c->flags);
__gc_pos_set(c, gc_phase(GC_PHASE_NOT_RUNNING));
bch2_gc_free(c);
goto again;
}

2
fs/bcachefs/buckets.h
View File

@ -91,7 +91,7 @@ static inline struct bucket *PTR_BUCKET(struct bch_dev *ca,
const struct bch_extent_ptr *ptr,
bool gc)
{
return bucket(ca, PTR_BUCKET_NR(ca, ptr));
return __bucket(ca, PTR_BUCKET_NR(ca, ptr), gc);
}
static inline struct bucket_mark ptr_bucket_mark(struct bch_dev *ca,