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bcachefs: move.c exports, refactoring

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Prep work for the new rebalance code - we need a few helpers exported.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-10-20 13:32:42 -04:00
parent 6ddedca218
commit a0bfe3b065
3 changed files with 88 additions and 62 deletions
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125
fs/bcachefs/move.c
View file

@ -171,8 +171,8 @@ void bch2_moving_ctxt_do_pending_writes(struct moving_context *ctxt,
}
}
static void bch2_move_ctxt_wait_for_io(struct moving_context *ctxt,
struct btree_trans *trans)
void bch2_move_ctxt_wait_for_io(struct moving_context *ctxt,
struct btree_trans *trans)
{
unsigned sectors_pending = atomic_read(&ctxt->write_sectors);
@ -287,14 +287,13 @@ static int bch2_extent_drop_ptrs(struct btree_trans *trans,
bch2_trans_commit(trans, NULL, NULL, BTREE_INSERT_NOFAIL);
}
static int bch2_move_extent(struct btree_trans *trans,
struct btree_iter *iter,
struct moving_context *ctxt,
struct move_bucket_in_flight *bucket_in_flight,
struct bch_io_opts io_opts,
enum btree_id btree_id,
struct bkey_s_c k,
struct data_update_opts data_opts)
int bch2_move_extent(struct btree_trans *trans,
struct btree_iter *iter,
struct moving_context *ctxt,
struct move_bucket_in_flight *bucket_in_flight,
struct bch_io_opts io_opts,
struct bkey_s_c k,
struct data_update_opts data_opts)
{
struct bch_fs *c = trans->c;
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
@ -356,7 +355,7 @@ static int bch2_move_extent(struct btree_trans *trans,
io->rbio.bio.bi_end_io = move_read_endio;
ret = bch2_data_update_init(trans, ctxt, &io->write, ctxt->wp,
io_opts, data_opts, btree_id, k);
io_opts, data_opts, iter->btree_id, k);
if (ret && ret != -BCH_ERR_unwritten_extent_update)
goto err_free_pages;
@ -371,6 +370,9 @@ static int bch2_move_extent(struct btree_trans *trans,
io->write.ctxt = ctxt;
io->write.op.end_io = move_write_done;
if (ctxt->rate)
bch2_ratelimit_increment(ctxt->rate, k.k->size);
if (ctxt->stats) {
atomic64_inc(&ctxt->stats->keys_moved);
atomic64_add(k.k->size, &ctxt->stats->sectors_moved);
@ -400,7 +402,7 @@ static int bch2_move_extent(struct btree_trans *trans,
closure_get(&ctxt->cl);
bch2_read_extent(trans, &io->rbio,
bkey_start_pos(k.k),
btree_id, k, 0,
iter->btree_id, k, 0,
BCH_READ_NODECODE|
BCH_READ_LAST_FRAGMENT);
return 0;
@ -464,9 +466,9 @@ struct bch_io_opts *bch2_move_get_io_opts(struct btree_trans *trans,
return &io_opts->fs_io_opts;
}
static int bch2_move_get_io_opts_one(struct btree_trans *trans,
struct bch_io_opts *io_opts,
struct bkey_s_c extent_k)
int bch2_move_get_io_opts_one(struct btree_trans *trans,
struct bch_io_opts *io_opts,
struct bkey_s_c extent_k)
{
struct btree_iter iter;
struct bkey_s_c k;
@ -497,8 +499,8 @@ static int bch2_move_get_io_opts_one(struct btree_trans *trans,
return 0;
}
static int move_ratelimit(struct btree_trans *trans,
struct moving_context *ctxt)
int bch2_move_ratelimit(struct btree_trans *trans,
struct moving_context *ctxt)
{
struct bch_fs *c = trans->c;
u64 delay;
@ -545,7 +547,8 @@ static int move_ratelimit(struct btree_trans *trans,
return 0;
}
static int __bch2_move_data(struct moving_context *ctxt,
static int bch2_move_data_btree(struct btree_trans *trans,
struct moving_context *ctxt,
struct bpos start,
struct bpos end,
move_pred_fn pred, void *arg,
@ -555,7 +558,6 @@ static int __bch2_move_data(struct moving_context *ctxt,
struct per_snapshot_io_opts snapshot_io_opts;
struct bch_io_opts *io_opts;
struct bkey_buf sk;
struct btree_trans *trans = bch2_trans_get(c);
struct btree_iter iter;
struct bkey_s_c k;
struct data_update_opts data_opts;
@ -577,7 +579,7 @@ static int __bch2_move_data(struct moving_context *ctxt,
if (ctxt->rate)
bch2_ratelimit_reset(ctxt->rate);
while (!move_ratelimit(trans, ctxt)) {
while (!bch2_move_ratelimit(trans, ctxt)) {
bch2_trans_begin(trans);
k = bch2_btree_iter_peek(&iter);
@ -616,7 +618,7 @@ static int __bch2_move_data(struct moving_context *ctxt,
k = bkey_i_to_s_c(sk.k);
ret2 = bch2_move_extent(trans, &iter, ctxt, NULL,
*io_opts, btree_id, k, data_opts);
*io_opts, k, data_opts);
if (ret2) {
if (bch2_err_matches(ret2, BCH_ERR_transaction_restart))
continue;
@ -630,9 +632,6 @@ static int __bch2_move_data(struct moving_context *ctxt,
/* XXX signal failure */
goto next;
}
if (ctxt->rate)
bch2_ratelimit_increment(ctxt->rate, k.k->size);
next:
if (ctxt->stats)
atomic64_add(k.k->size, &ctxt->stats->sectors_seen);
@ -641,48 +640,60 @@ static int __bch2_move_data(struct moving_context *ctxt,
}
bch2_trans_iter_exit(trans, &iter);
bch2_trans_put(trans);
bch2_bkey_buf_exit(&sk, c);
per_snapshot_io_opts_exit(&snapshot_io_opts);
return ret;
}
int __bch2_move_data(struct btree_trans *trans,
struct moving_context *ctxt,
struct bbpos start,
struct bbpos end,
move_pred_fn pred, void *arg)
{
struct bch_fs *c = trans->c;
enum btree_id id;
int ret = 0;
for (id = start.btree;
id <= min_t(unsigned, end.btree, btree_id_nr_alive(c) - 1);
id++) {
ctxt->stats->btree_id = id;
if (!btree_type_has_ptrs(id) ||
!bch2_btree_id_root(c, id)->b)
continue;
ret = bch2_move_data_btree(trans, ctxt,
id == start.btree ? start.pos : POS_MIN,
id == end.btree ? end.pos : POS_MAX,
pred, arg, id);
if (ret)
break;
}
return ret;
}
int bch2_move_data(struct bch_fs *c,
enum btree_id start_btree_id, struct bpos start_pos,
enum btree_id end_btree_id, struct bpos end_pos,
struct bbpos start,
struct bbpos end,
struct bch_ratelimit *rate,
struct bch_move_stats *stats,
struct write_point_specifier wp,
bool wait_on_copygc,
move_pred_fn pred, void *arg)
{
struct btree_trans *trans;
struct moving_context ctxt;
enum btree_id id;
int ret = 0;
int ret;
bch2_moving_ctxt_init(&ctxt, c, rate, stats, wp, wait_on_copygc);
for (id = start_btree_id;
id <= min_t(unsigned, end_btree_id, btree_id_nr_alive(c) - 1);
id++) {
stats->btree_id = id;
if (id != BTREE_ID_extents &&
id != BTREE_ID_reflink)
continue;
if (!bch2_btree_id_root(c, id)->b)
continue;
ret = __bch2_move_data(&ctxt,
id == start_btree_id ? start_pos : POS_MIN,
id == end_btree_id ? end_pos : POS_MAX,
pred, arg, id);
if (ret)
break;
}
trans = bch2_trans_get(c);
ret = __bch2_move_data(trans, &ctxt, start, end, pred, arg);
bch2_trans_put(trans);
bch2_moving_ctxt_exit(&ctxt);
return ret;
@ -739,7 +750,7 @@ int __bch2_evacuate_bucket(struct btree_trans *trans,
goto err;
}
while (!(ret = move_ratelimit(trans, ctxt))) {
while (!(ret = bch2_move_ratelimit(trans, ctxt))) {
bch2_trans_begin(trans);
ret = bch2_get_next_backpointer(trans, bucket, gen,
@ -791,7 +802,7 @@ int __bch2_evacuate_bucket(struct btree_trans *trans,
ret = bch2_move_extent(trans, &iter, ctxt,
bucket_in_flight,
io_opts, bp.btree_id, k, data_opts);
io_opts, k, data_opts);
bch2_trans_iter_exit(trans, &iter);
if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
@ -804,8 +815,6 @@ int __bch2_evacuate_bucket(struct btree_trans *trans,
if (ret)
goto err;
if (ctxt->rate)
bch2_ratelimit_increment(ctxt->rate, k.k->size);
if (ctxt->stats)
atomic64_add(k.k->size, &ctxt->stats->sectors_seen);
} else {
@ -1087,8 +1096,8 @@ int bch2_data_job(struct bch_fs *c,
ret = bch2_replicas_gc2(c) ?: ret;
ret = bch2_move_data(c,
op.start_btree, op.start_pos,
op.end_btree, op.end_pos,
(struct bbpos) { op.start_btree, op.start_pos },
(struct bbpos) { op.end_btree, op.end_pos },
NULL,
stats,
writepoint_hashed((unsigned long) current),
@ -1111,8 +1120,8 @@ int bch2_data_job(struct bch_fs *c,
ret = bch2_replicas_gc2(c) ?: ret;
ret = bch2_move_data(c,
op.start_btree, op.start_pos,
op.end_btree, op.end_pos,
(struct bbpos) { op.start_btree, op.start_pos },
(struct bbpos) { op.end_btree, op.end_pos },
NULL,
stats,
writepoint_hashed((unsigned long) current),

22
fs/bcachefs/move.h
View file

@ -2,6 +2,7 @@
#ifndef _BCACHEFS_MOVE_H
#define _BCACHEFS_MOVE_H
#include "bbpos.h"
#include "bcachefs_ioctl.h"
#include "btree_iter.h"
#include "buckets.h"
@ -61,6 +62,9 @@ void bch2_moving_ctxt_init(struct moving_context *, struct bch_fs *,
struct moving_io *bch2_moving_ctxt_next_pending_write(struct moving_context *);
void bch2_moving_ctxt_do_pending_writes(struct moving_context *,
struct btree_trans *);
void bch2_move_ctxt_wait_for_io(struct moving_context *,
struct btree_trans *);
int bch2_move_ratelimit(struct btree_trans *, struct moving_context *);
/* Inodes in different snapshots may have different IO options: */
struct snapshot_io_opts_entry {
@ -87,12 +91,26 @@ static inline void per_snapshot_io_opts_exit(struct per_snapshot_io_opts *io_opt
struct bch_io_opts *bch2_move_get_io_opts(struct btree_trans *,
struct per_snapshot_io_opts *, struct bkey_s_c);
int bch2_move_get_io_opts_one(struct btree_trans *, struct bch_io_opts *, struct bkey_s_c);
int bch2_scan_old_btree_nodes(struct bch_fs *, struct bch_move_stats *);
int bch2_move_extent(struct btree_trans *,
struct btree_iter *,
struct moving_context *,
struct move_bucket_in_flight *,
struct bch_io_opts,
struct bkey_s_c,
struct data_update_opts);
int __bch2_move_data(struct btree_trans *,
struct moving_context *,
struct bbpos,
struct bbpos,
move_pred_fn, void *);
int bch2_move_data(struct bch_fs *,
enum btree_id, struct bpos,
enum btree_id, struct bpos,
struct bbpos start,
struct bbpos end,
struct bch_ratelimit *,
struct bch_move_stats *,
struct write_point_specifier,

3
fs/bcachefs/rebalance.c
View file

@ -254,8 +254,7 @@ static int bch2_rebalance_thread(void *arg)
rebalance_work_reset(c);
bch2_move_data(c,
0, POS_MIN,
BTREE_ID_NR, POS_MAX,
BBPOS_MIN, BBPOS_MAX,
/* ratelimiting disabled for now */
NULL, /* &r->pd.rate, */
&move_stats,