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bcachefs: extents_to_bp_state

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-01-15 18:19:52 -05:00
parent ba96d36ca5
commit 1a5039041b
1 changed files with 41 additions and 48 deletions
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89
fs/bcachefs/backpointers.c
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@ -407,13 +407,17 @@ static inline bool bkey_and_val_eq(struct bkey_s_c l, struct bkey_s_c r)
!memcmp(l.v, r.v, bkey_val_bytes(l.k));
}
struct extents_to_bp_state {
struct bpos bucket_start;
struct bpos bucket_end;
struct bkey_buf last_flushed;
};
static int check_bp_exists(struct btree_trans *trans,
struct extents_to_bp_state *s,
struct bpos bucket,
struct bch_backpointer bp,
struct bkey_s_c orig_k,
struct bpos bucket_start,
struct bpos bucket_end,
struct bkey_buf *last_flushed)
struct bkey_s_c orig_k)
{
struct bch_fs *c = trans->c;
struct btree_iter bp_iter = { NULL };
@ -424,8 +428,8 @@ static int check_bp_exists(struct btree_trans *trans,
bch2_bkey_buf_init(&tmp);
if (bpos_lt(bucket, bucket_start) ||
bpos_gt(bucket, bucket_end))
if (bpos_lt(bucket, s->bucket_start) ||
bpos_gt(bucket, s->bucket_end))
return 0;
if (!bch2_dev_bucket_exists(c, bucket))
@ -440,9 +444,9 @@ static int check_bp_exists(struct btree_trans *trans,
if (bp_k.k->type != KEY_TYPE_backpointer ||
memcmp(bkey_s_c_to_backpointer(bp_k).v, &bp, sizeof(bp))) {
if (!bkey_and_val_eq(orig_k, bkey_i_to_s_c(last_flushed->k))) {
bch2_bkey_buf_reassemble(&tmp, c, orig_k);
bch2_bkey_buf_reassemble(&tmp, c, orig_k);
if (!bkey_and_val_eq(orig_k, bkey_i_to_s_c(s->last_flushed.k))) {
if (bp.level) {
bch2_trans_unlock(trans);
bch2_btree_interior_updates_flush(c);
@ -452,7 +456,7 @@ static int check_bp_exists(struct btree_trans *trans,
if (ret)
goto err;
bch2_bkey_buf_copy(last_flushed, c, tmp.k);
bch2_bkey_buf_copy(&s->last_flushed, c, tmp.k);
ret = -BCH_ERR_transaction_restart_write_buffer_flush;
goto out;
}
@ -480,10 +484,8 @@ missing:
}
static int check_extent_to_backpointers(struct btree_trans *trans,
struct extents_to_bp_state *s,
enum btree_id btree, unsigned level,
struct bpos bucket_start,
struct bpos bucket_end,
struct bkey_buf *last_flushed,
struct bkey_s_c k)
{
struct bch_fs *c = trans->c;
@ -503,9 +505,7 @@ static int check_extent_to_backpointers(struct btree_trans *trans,
bch2_extent_ptr_to_bp(c, btree, level,
k, p, &bucket_pos, &bp);
ret = check_bp_exists(trans, bucket_pos, bp, k,
bucket_start, bucket_end,
last_flushed);
ret = check_bp_exists(trans, s, bucket_pos, bp, k);
if (ret)
return ret;
}
@ -514,10 +514,8 @@ static int check_extent_to_backpointers(struct btree_trans *trans,
}
static int check_btree_root_to_backpointers(struct btree_trans *trans,
struct extents_to_bp_state *s,
enum btree_id btree_id,
struct bpos bucket_start,
struct bpos bucket_end,
struct bkey_buf *last_flushed,
int *level)
{
struct bch_fs *c = trans->c;
@ -541,9 +539,7 @@ retry:
*level = b->c.level;
k = bkey_i_to_s_c(&b->key);
ret = check_extent_to_backpointers(trans, btree_id, b->c.level + 1,
bucket_start, bucket_end,
last_flushed, k);
ret = check_extent_to_backpointers(trans, s, btree_id, b->c.level + 1, k);
err:
bch2_trans_iter_exit(trans, &iter);
return ret;
@ -615,43 +611,35 @@ static int bch2_get_btree_in_memory_pos(struct btree_trans *trans,
}
static int bch2_check_extents_to_backpointers_pass(struct btree_trans *trans,
struct bpos bucket_start,
struct bpos bucket_end)
struct extents_to_bp_state *s)
{
struct bch_fs *c = trans->c;
struct btree_iter iter;
enum btree_id btree_id;
struct bkey_s_c k;
struct bkey_buf last_flushed;
int ret = 0;
bch2_bkey_buf_init(&last_flushed);
bkey_init(&last_flushed.k->k);
for (btree_id = 0; btree_id < btree_id_nr_alive(c); btree_id++) {
for (enum btree_id btree_id = 0;
btree_id < btree_id_nr_alive(c);
btree_id++) {
int level, depth = btree_type_has_ptrs(btree_id) ? 0 : 1;
ret = commit_do(trans, NULL, NULL,
BCH_TRANS_COMMIT_no_enospc,
check_btree_root_to_backpointers(trans, btree_id,
bucket_start, bucket_end,
&last_flushed, &level));
check_btree_root_to_backpointers(trans, s, btree_id, &level));
if (ret)
return ret;
while (level >= depth) {
struct btree_iter iter;
bch2_trans_node_iter_init(trans, &iter, btree_id, POS_MIN, 0,
level,
BTREE_ITER_PREFETCH);
while (1) {
bch2_trans_begin(trans);
k = bch2_btree_iter_peek(&iter);
struct bkey_s_c k = bch2_btree_iter_peek(&iter);
if (!k.k)
break;
ret = bkey_err(k) ?:
check_extent_to_backpointers(trans, btree_id, level,
bucket_start, bucket_end,
&last_flushed, k) ?:
check_extent_to_backpointers(trans, s, btree_id, level, k) ?:
bch2_trans_commit(trans, NULL, NULL,
BCH_TRANS_COMMIT_no_enospc);
if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) {
@ -673,7 +661,6 @@ static int bch2_check_extents_to_backpointers_pass(struct btree_trans *trans,
}
}
bch2_bkey_buf_exit(&last_flushed, c);
return 0;
}
@ -736,37 +723,43 @@ static int bch2_get_alloc_in_memory_pos(struct btree_trans *trans,
int bch2_check_extents_to_backpointers(struct bch_fs *c)
{
struct btree_trans *trans = bch2_trans_get(c);
struct bpos start = POS_MIN, end;
struct extents_to_bp_state s = { .bucket_start = POS_MIN };
int ret;
bch2_bkey_buf_init(&s.last_flushed);
bkey_init(&s.last_flushed.k->k);
while (1) {
ret = bch2_get_alloc_in_memory_pos(trans, start, &end);
ret = bch2_get_alloc_in_memory_pos(trans, s.bucket_start, &s.bucket_end);
if (ret)
break;
if (bpos_eq(start, POS_MIN) && !bpos_eq(end, SPOS_MAX))
if ( bpos_eq(s.bucket_start, POS_MIN) &&
!bpos_eq(s.bucket_end, SPOS_MAX))
bch_verbose(c, "%s(): alloc info does not fit in ram, running in multiple passes with %zu nodes per pass",
__func__, btree_nodes_fit_in_ram(c));
if (!bpos_eq(start, POS_MIN) || !bpos_eq(end, SPOS_MAX)) {
if (!bpos_eq(s.bucket_start, POS_MIN) ||
!bpos_eq(s.bucket_end, SPOS_MAX)) {
struct printbuf buf = PRINTBUF;
prt_str(&buf, "check_extents_to_backpointers(): ");
bch2_bpos_to_text(&buf, start);
bch2_bpos_to_text(&buf, s.bucket_start);
prt_str(&buf, "-");
bch2_bpos_to_text(&buf, end);
bch2_bpos_to_text(&buf, s.bucket_end);
bch_verbose(c, "%s", buf.buf);
printbuf_exit(&buf);
}
ret = bch2_check_extents_to_backpointers_pass(trans, start, end);
if (ret || bpos_eq(end, SPOS_MAX))
ret = bch2_check_extents_to_backpointers_pass(trans, &s);
if (ret || bpos_eq(s.bucket_end, SPOS_MAX))
break;
start = bpos_successor(end);
s.bucket_start = bpos_successor(s.bucket_end);
}
bch2_trans_put(trans);
bch2_bkey_buf_exit(&s.last_flushed, c);
bch_err_fn(c, ret);
return ret;