+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-
-#include "bcachefs.h"
-#include "alloc_background.h"
-#include "alloc_foreground.h"
-#include "backpointers.h"
-#include "bkey_buf.h"
-#include "btree_gc.h"
-#include "btree_update.h"
-#include "btree_update_interior.h"
-#include "btree_write_buffer.h"
-#include "disk_groups.h"
-#include "ec.h"
-#include "errcode.h"
-#include "error.h"
-#include "inode.h"
-#include "io_read.h"
-#include "io_write.h"
-#include "journal_reclaim.h"
-#include "keylist.h"
-#include "move.h"
-#include "replicas.h"
-#include "snapshot.h"
-#include "super-io.h"
-#include "trace.h"
-
-#include <linux/ioprio.h>
-#include <linux/kthread.h>
-
-const char * const bch2_data_ops_strs[] = {
-#define x(t, n, ...) [n] = #t,
- BCH_DATA_OPS()
-#undef x
- NULL
-};
-
-static void trace_move_extent2(struct bch_fs *c, struct bkey_s_c k)
-{
- if (trace_move_extent_enabled()) {
- struct printbuf buf = PRINTBUF;
-
- bch2_bkey_val_to_text(&buf, c, k);
- trace_move_extent(c, buf.buf);
- printbuf_exit(&buf);
- }
-}
-
-static void trace_move_extent_read2(struct bch_fs *c, struct bkey_s_c k)
-{
- if (trace_move_extent_read_enabled()) {
- struct printbuf buf = PRINTBUF;
-
- bch2_bkey_val_to_text(&buf, c, k);
- trace_move_extent_read(c, buf.buf);
- printbuf_exit(&buf);
- }
-}
-
-struct moving_io {
- struct list_head read_list;
- struct list_head io_list;
- struct move_bucket_in_flight *b;
- struct closure cl;
- bool read_completed;
-
- unsigned read_sectors;
- unsigned write_sectors;
-
- struct bch_read_bio rbio;
-
- struct data_update write;
- /* Must be last since it is variable size */
- struct bio_vec bi_inline_vecs[];
-};
-
-static void move_free(struct moving_io *io)
-{
- struct moving_context *ctxt = io->write.ctxt;
-
- if (io->b)
- atomic_dec(&io->b->count);
-
- bch2_data_update_exit(&io->write);
-
- mutex_lock(&ctxt->lock);
- list_del(&io->io_list);
- wake_up(&ctxt->wait);
- mutex_unlock(&ctxt->lock);
-
- kfree(io);
-}
-
-static void move_write_done(struct bch_write_op *op)
-{
- struct moving_io *io = container_of(op, struct moving_io, write.op);
- struct moving_context *ctxt = io->write.ctxt;
-
- if (io->write.op.error)
- ctxt->write_error = true;
-
- atomic_sub(io->write_sectors, &io->write.ctxt->write_sectors);
- atomic_dec(&io->write.ctxt->write_ios);
- move_free(io);
- closure_put(&ctxt->cl);
-}
-
-static void move_write(struct moving_io *io)
-{
- if (unlikely(io->rbio.bio.bi_status || io->rbio.hole)) {
- move_free(io);
- return;
- }
-
- closure_get(&io->write.ctxt->cl);
- atomic_add(io->write_sectors, &io->write.ctxt->write_sectors);
- atomic_inc(&io->write.ctxt->write_ios);
-
- bch2_data_update_read_done(&io->write, io->rbio.pick.crc);
-}
-
-struct moving_io *bch2_moving_ctxt_next_pending_write(struct moving_context *ctxt)
-{
- struct moving_io *io =
- list_first_entry_or_null(&ctxt->reads, struct moving_io, read_list);
-
- return io && io->read_completed ? io : NULL;
-}
-
-static void move_read_endio(struct bio *bio)
-{
- struct moving_io *io = container_of(bio, struct moving_io, rbio.bio);
- struct moving_context *ctxt = io->write.ctxt;
-
- atomic_sub(io->read_sectors, &ctxt->read_sectors);
- atomic_dec(&ctxt->read_ios);
- io->read_completed = true;
-
- wake_up(&ctxt->wait);
- closure_put(&ctxt->cl);
-}
-
-void bch2_moving_ctxt_do_pending_writes(struct moving_context *ctxt)
-{
- struct moving_io *io;
-
- while ((io = bch2_moving_ctxt_next_pending_write(ctxt))) {
- bch2_trans_unlock_long(ctxt->trans);
- list_del(&io->read_list);
- move_write(io);
- }
-}
-
-void bch2_move_ctxt_wait_for_io(struct moving_context *ctxt)
-{
- unsigned sectors_pending = atomic_read(&ctxt->write_sectors);
-
- move_ctxt_wait_event(ctxt,
- !atomic_read(&ctxt->write_sectors) ||
- atomic_read(&ctxt->write_sectors) != sectors_pending);
-}
-
-void bch2_moving_ctxt_flush_all(struct moving_context *ctxt)
-{
- move_ctxt_wait_event(ctxt, list_empty(&ctxt->reads));
- bch2_trans_unlock_long(ctxt->trans);
- closure_sync(&ctxt->cl);
-}
-
-void bch2_moving_ctxt_exit(struct moving_context *ctxt)
-{
- struct bch_fs *c = ctxt->trans->c;
-
- bch2_moving_ctxt_flush_all(ctxt);
-
- EBUG_ON(atomic_read(&ctxt->write_sectors));
- EBUG_ON(atomic_read(&ctxt->write_ios));
- EBUG_ON(atomic_read(&ctxt->read_sectors));
- EBUG_ON(atomic_read(&ctxt->read_ios));
-
- mutex_lock(&c->moving_context_lock);
- list_del(&ctxt->list);
- mutex_unlock(&c->moving_context_lock);
-
- bch2_trans_put(ctxt->trans);
- memset(ctxt, 0, sizeof(*ctxt));
-}
-
-void bch2_moving_ctxt_init(struct moving_context *ctxt,
- struct bch_fs *c,
- struct bch_ratelimit *rate,
- struct bch_move_stats *stats,
- struct write_point_specifier wp,
- bool wait_on_copygc)
-{
- memset(ctxt, 0, sizeof(*ctxt));
-
- ctxt->trans = bch2_trans_get(c);
- ctxt->fn = (void *) _RET_IP_;
- ctxt->rate = rate;
- ctxt->stats = stats;
- ctxt->wp = wp;
- ctxt->wait_on_copygc = wait_on_copygc;
-
- closure_init_stack(&ctxt->cl);
-
- mutex_init(&ctxt->lock);
- INIT_LIST_HEAD(&ctxt->reads);
- INIT_LIST_HEAD(&ctxt->ios);
- init_waitqueue_head(&ctxt->wait);
-
- mutex_lock(&c->moving_context_lock);
- list_add(&ctxt->list, &c->moving_context_list);
- mutex_unlock(&c->moving_context_lock);
-}
-
-void bch2_move_stats_exit(struct bch_move_stats *stats, struct bch_fs *c)
-{
- trace_move_data(c, stats);
-}
-
-void bch2_move_stats_init(struct bch_move_stats *stats, const char *name)
-{
- memset(stats, 0, sizeof(*stats));
- stats->data_type = BCH_DATA_user;
- scnprintf(stats->name, sizeof(stats->name), "%s", name);
-}
-
-int bch2_move_extent(struct moving_context *ctxt,
- struct move_bucket_in_flight *bucket_in_flight,
- struct btree_iter *iter,
- struct bkey_s_c k,
- struct bch_io_opts io_opts,
- struct data_update_opts data_opts)
-{
- struct btree_trans *trans = ctxt->trans;
- struct bch_fs *c = trans->c;
- struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
- struct moving_io *io;
- const union bch_extent_entry *entry;
- struct extent_ptr_decoded p;
- unsigned sectors = k.k->size, pages;
- int ret = -ENOMEM;
-
- if (ctxt->stats)
- ctxt->stats->pos = BBPOS(iter->btree_id, iter->pos);
- trace_move_extent2(c, k);
-
- bch2_data_update_opts_normalize(k, &data_opts);
-
- if (!data_opts.rewrite_ptrs &&
- !data_opts.extra_replicas) {
- if (data_opts.kill_ptrs)
- return bch2_extent_drop_ptrs(trans, iter, k, data_opts);
- return 0;
- }
-
- /*
- * Before memory allocations & taking nocow locks in
- * bch2_data_update_init():
- */
- bch2_trans_unlock(trans);
-
- /* write path might have to decompress data: */
- bkey_for_each_ptr_decode(k.k, ptrs, p, entry)
- sectors = max_t(unsigned, sectors, p.crc.uncompressed_size);
-
- pages = DIV_ROUND_UP(sectors, PAGE_SECTORS);
- io = kzalloc(sizeof(struct moving_io) +
- sizeof(struct bio_vec) * pages, GFP_KERNEL);
- if (!io)
- goto err;
-
- INIT_LIST_HEAD(&io->io_list);
- io->write.ctxt = ctxt;
- io->read_sectors = k.k->size;
- io->write_sectors = k.k->size;
-
- bio_init(&io->write.op.wbio.bio, NULL, io->bi_inline_vecs, pages, 0);
- bio_set_prio(&io->write.op.wbio.bio,
- IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0));
-
- if (bch2_bio_alloc_pages(&io->write.op.wbio.bio, sectors << 9,
- GFP_KERNEL))
- goto err_free;
-
- io->rbio.c = c;
- io->rbio.opts = io_opts;
- bio_init(&io->rbio.bio, NULL, io->bi_inline_vecs, pages, 0);
- io->rbio.bio.bi_vcnt = pages;
- bio_set_prio(&io->rbio.bio, IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0));
- io->rbio.bio.bi_iter.bi_size = sectors << 9;
-
- io->rbio.bio.bi_opf = REQ_OP_READ;
- io->rbio.bio.bi_iter.bi_sector = bkey_start_offset(k.k);
- io->rbio.bio.bi_end_io = move_read_endio;
-
- ret = bch2_data_update_init(trans, iter, ctxt, &io->write, ctxt->wp,
- io_opts, data_opts, iter->btree_id, k);
- if (ret)
- goto err_free_pages;
-
- 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);
- }
-
- if (bucket_in_flight) {
- io->b = bucket_in_flight;
- atomic_inc(&io->b->count);
- }
-
- this_cpu_add(c->counters[BCH_COUNTER_io_move], k.k->size);
- this_cpu_add(c->counters[BCH_COUNTER_move_extent_read], k.k->size);
- trace_move_extent_read2(c, k);
-
- mutex_lock(&ctxt->lock);
- atomic_add(io->read_sectors, &ctxt->read_sectors);
- atomic_inc(&ctxt->read_ios);
-
- list_add_tail(&io->read_list, &ctxt->reads);
- list_add_tail(&io->io_list, &ctxt->ios);
- mutex_unlock(&ctxt->lock);
-
- /*
- * dropped by move_read_endio() - guards against use after free of
- * ctxt when doing wakeup
- */
- closure_get(&ctxt->cl);
- bch2_read_extent(trans, &io->rbio,
- bkey_start_pos(k.k),
- iter->btree_id, k, 0,
- BCH_READ_NODECODE|
- BCH_READ_LAST_FRAGMENT);
- return 0;
-err_free_pages:
- bio_free_pages(&io->write.op.wbio.bio);
-err_free:
- kfree(io);
-err:
- if (ret == -BCH_ERR_data_update_done)
- return 0;
-
- if (bch2_err_matches(ret, EROFS) ||
- bch2_err_matches(ret, BCH_ERR_transaction_restart))
- return ret;
-
- count_event(c, move_extent_start_fail);
-
- if (trace_move_extent_start_fail_enabled()) {
- struct printbuf buf = PRINTBUF;
-
- bch2_bkey_val_to_text(&buf, c, k);
- prt_str(&buf, ": ");
- prt_str(&buf, bch2_err_str(ret));
- trace_move_extent_start_fail(c, buf.buf);
- printbuf_exit(&buf);
- }
- return ret;
-}
-
-struct bch_io_opts *bch2_move_get_io_opts(struct btree_trans *trans,
- struct per_snapshot_io_opts *io_opts,
- struct bkey_s_c extent_k)
-{
- struct bch_fs *c = trans->c;
- u32 restart_count = trans->restart_count;
- int ret = 0;
-
- if (io_opts->cur_inum != extent_k.k->p.inode) {
- io_opts->d.nr = 0;
-
- ret = for_each_btree_key(trans, iter, BTREE_ID_inodes, POS(0, extent_k.k->p.inode),
- BTREE_ITER_ALL_SNAPSHOTS, k, ({
- if (k.k->p.offset != extent_k.k->p.inode)
- break;
-
- if (!bkey_is_inode(k.k))
- continue;
-
- struct bch_inode_unpacked inode;
- BUG_ON(bch2_inode_unpack(k, &inode));
-
- struct snapshot_io_opts_entry e = { .snapshot = k.k->p.snapshot };
- bch2_inode_opts_get(&e.io_opts, trans->c, &inode);
-
- darray_push(&io_opts->d, e);
- }));
- io_opts->cur_inum = extent_k.k->p.inode;
- }
-
- ret = ret ?: trans_was_restarted(trans, restart_count);
- if (ret)
- return ERR_PTR(ret);
-
- if (extent_k.k->p.snapshot)
- darray_for_each(io_opts->d, i)
- if (bch2_snapshot_is_ancestor(c, extent_k.k->p.snapshot, i->snapshot))
- return &i->io_opts;
-
- return &io_opts->fs_io_opts;
-}
-
-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;
- int ret;
-
- /* reflink btree? */
- if (!extent_k.k->p.inode) {
- *io_opts = bch2_opts_to_inode_opts(trans->c->opts);
- return 0;
- }
-
- k = bch2_bkey_get_iter(trans, &iter, BTREE_ID_inodes,
- SPOS(0, extent_k.k->p.inode, extent_k.k->p.snapshot),
- BTREE_ITER_CACHED);
- ret = bkey_err(k);
- if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
- return ret;
-
- if (!ret && bkey_is_inode(k.k)) {
- struct bch_inode_unpacked inode;
- bch2_inode_unpack(k, &inode);
- bch2_inode_opts_get(io_opts, trans->c, &inode);
- } else {
- *io_opts = bch2_opts_to_inode_opts(trans->c->opts);
- }
-
- bch2_trans_iter_exit(trans, &iter);
- return 0;
-}
-
-int bch2_move_ratelimit(struct moving_context *ctxt)
-{
- struct bch_fs *c = ctxt->trans->c;
- bool is_kthread = current->flags & PF_KTHREAD;
- u64 delay;
-
- if (ctxt->wait_on_copygc && c->copygc_running) {
- bch2_moving_ctxt_flush_all(ctxt);
- wait_event_killable(c->copygc_running_wq,
- !c->copygc_running ||
- (is_kthread && kthread_should_stop()));
- }
-
- do {
- delay = ctxt->rate ? bch2_ratelimit_delay(ctxt->rate) : 0;
-
- if (is_kthread && kthread_should_stop())
- return 1;
-
- if (delay)
- move_ctxt_wait_event_timeout(ctxt,
- freezing(current) ||
- (is_kthread && kthread_should_stop()),
- delay);
-
- if (unlikely(freezing(current))) {
- bch2_moving_ctxt_flush_all(ctxt);
- try_to_freeze();
- }
- } while (delay);
-
- /*
- * XXX: these limits really ought to be per device, SSDs and hard drives
- * will want different limits
- */
- move_ctxt_wait_event(ctxt,
- atomic_read(&ctxt->write_sectors) < c->opts.move_bytes_in_flight >> 9 &&
- atomic_read(&ctxt->read_sectors) < c->opts.move_bytes_in_flight >> 9 &&
- atomic_read(&ctxt->write_ios) < c->opts.move_ios_in_flight &&
- atomic_read(&ctxt->read_ios) < c->opts.move_ios_in_flight);
-
- return 0;
-}
-
-static int bch2_move_data_btree(struct moving_context *ctxt,
- struct bpos start,
- struct bpos end,
- move_pred_fn pred, void *arg,
- enum btree_id btree_id)
-{
- struct btree_trans *trans = ctxt->trans;
- struct bch_fs *c = trans->c;
- struct per_snapshot_io_opts snapshot_io_opts;
- struct bch_io_opts *io_opts;
- struct bkey_buf sk;
- struct btree_iter iter;
- struct bkey_s_c k;
- struct data_update_opts data_opts;
- int ret = 0, ret2;
-
- per_snapshot_io_opts_init(&snapshot_io_opts, c);
- bch2_bkey_buf_init(&sk);
-
- if (ctxt->stats) {
- ctxt->stats->data_type = BCH_DATA_user;
- ctxt->stats->pos = BBPOS(btree_id, start);
- }
-
- bch2_trans_iter_init(trans, &iter, btree_id, start,
- BTREE_ITER_PREFETCH|
- BTREE_ITER_ALL_SNAPSHOTS);
-
- if (ctxt->rate)
- bch2_ratelimit_reset(ctxt->rate);
-
- while (!bch2_move_ratelimit(ctxt)) {
- bch2_trans_begin(trans);
-
- k = bch2_btree_iter_peek(&iter);
- if (!k.k)
- break;
-
- ret = bkey_err(k);
- if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
- continue;
- if (ret)
- break;
-
- if (bkey_ge(bkey_start_pos(k.k), end))
- break;
-
- if (ctxt->stats)
- ctxt->stats->pos = BBPOS(iter.btree_id, iter.pos);
-
- if (!bkey_extent_is_direct_data(k.k))
- goto next_nondata;
-
- io_opts = bch2_move_get_io_opts(trans, &snapshot_io_opts, k);
- ret = PTR_ERR_OR_ZERO(io_opts);
- if (ret)
- continue;
-
- memset(&data_opts, 0, sizeof(data_opts));
- if (!pred(c, arg, k, io_opts, &data_opts))
- goto next;
-
- /*
- * The iterator gets unlocked by __bch2_read_extent - need to
- * save a copy of @k elsewhere:
- */
- bch2_bkey_buf_reassemble(&sk, c, k);
- k = bkey_i_to_s_c(sk.k);
-
- ret2 = bch2_move_extent(ctxt, NULL, &iter, k, *io_opts, data_opts);
- if (ret2) {
- if (bch2_err_matches(ret2, BCH_ERR_transaction_restart))
- continue;
-
- if (ret2 == -ENOMEM) {
- /* memory allocation failure, wait for some IO to finish */
- bch2_move_ctxt_wait_for_io(ctxt);
- continue;
- }
-
- /* XXX signal failure */
- goto next;
- }
-next:
- if (ctxt->stats)
- atomic64_add(k.k->size, &ctxt->stats->sectors_seen);
-next_nondata:
- bch2_btree_iter_advance(&iter);
- }
-
- bch2_trans_iter_exit(trans, &iter);
- bch2_bkey_buf_exit(&sk, c);
- per_snapshot_io_opts_exit(&snapshot_io_opts);
-
- return ret;
-}
-
-int __bch2_move_data(struct moving_context *ctxt,
- struct bbpos start,
- struct bbpos end,
- move_pred_fn pred, void *arg)
-{
- struct bch_fs *c = ctxt->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->pos = BBPOS(id, POS_MIN);
-
- if (!btree_type_has_ptrs(id) ||
- !bch2_btree_id_root(c, id)->b)
- continue;
-
- ret = bch2_move_data_btree(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,
- 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 moving_context ctxt;
- int ret;
-
- bch2_moving_ctxt_init(&ctxt, c, rate, stats, wp, wait_on_copygc);
- ret = __bch2_move_data(&ctxt, start, end, pred, arg);
- bch2_moving_ctxt_exit(&ctxt);
-
- return ret;
-}
-
-int bch2_evacuate_bucket(struct moving_context *ctxt,
- struct move_bucket_in_flight *bucket_in_flight,
- struct bpos bucket, int gen,
- struct data_update_opts _data_opts)
-{
- struct btree_trans *trans = ctxt->trans;
- struct bch_fs *c = trans->c;
- bool is_kthread = current->flags & PF_KTHREAD;
- struct bch_io_opts io_opts = bch2_opts_to_inode_opts(c->opts);
- struct btree_iter iter;
- struct bkey_buf sk;
- struct bch_backpointer bp;
- struct bch_alloc_v4 a_convert;
- const struct bch_alloc_v4 *a;
- struct bkey_s_c k;
- struct data_update_opts data_opts;
- unsigned dirty_sectors, bucket_size;
- u64 fragmentation;
- struct bpos bp_pos = POS_MIN;
- int ret = 0;
-
- trace_bucket_evacuate(c, &bucket);
-
- bch2_bkey_buf_init(&sk);
-
- /*
- * We're not run in a context that handles transaction restarts:
- */
- bch2_trans_begin(trans);
-
- bch2_trans_iter_init(trans, &iter, BTREE_ID_alloc,
- bucket, BTREE_ITER_CACHED);
- ret = lockrestart_do(trans,
- bkey_err(k = bch2_btree_iter_peek_slot(&iter)));
- bch2_trans_iter_exit(trans, &iter);
-
- bch_err_msg(c, ret, "looking up alloc key");
- if (ret)
- goto err;
-
- a = bch2_alloc_to_v4(k, &a_convert);
- dirty_sectors = bch2_bucket_sectors_dirty(*a);
- bucket_size = bch_dev_bkey_exists(c, bucket.inode)->mi.bucket_size;
- fragmentation = a->fragmentation_lru;
-
- ret = bch2_btree_write_buffer_tryflush(trans);
- bch_err_msg(c, ret, "flushing btree write buffer");
- if (ret)
- goto err;
-
- while (!(ret = bch2_move_ratelimit(ctxt))) {
- if (is_kthread && kthread_should_stop())
- break;
-
- bch2_trans_begin(trans);
-
- ret = bch2_get_next_backpointer(trans, bucket, gen,
- &bp_pos, &bp,
- BTREE_ITER_CACHED);
- if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
- continue;
- if (ret)
- goto err;
- if (bkey_eq(bp_pos, POS_MAX))
- break;
-
- if (!bp.level) {
- k = bch2_backpointer_get_key(trans, &iter, bp_pos, bp, 0);
- ret = bkey_err(k);
- if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
- continue;
- if (ret)
- goto err;
- if (!k.k)
- goto next;
-
- bch2_bkey_buf_reassemble(&sk, c, k);
- k = bkey_i_to_s_c(sk.k);
-
- ret = bch2_move_get_io_opts_one(trans, &io_opts, k);
- if (ret) {
- bch2_trans_iter_exit(trans, &iter);
- continue;
- }
-
- data_opts = _data_opts;
- data_opts.target = io_opts.background_target;
- data_opts.rewrite_ptrs = 0;
-
- unsigned i = 0;
- bkey_for_each_ptr(bch2_bkey_ptrs_c(k), ptr) {
- if (ptr->dev == bucket.inode) {
- data_opts.rewrite_ptrs |= 1U << i;
- if (ptr->cached) {
- bch2_trans_iter_exit(trans, &iter);
- goto next;
- }
- }
- i++;
- }
-
- ret = bch2_move_extent(ctxt, bucket_in_flight,
- &iter, k, io_opts, data_opts);
- bch2_trans_iter_exit(trans, &iter);
-
- if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
- continue;
- if (ret == -ENOMEM) {
- /* memory allocation failure, wait for some IO to finish */
- bch2_move_ctxt_wait_for_io(ctxt);
- continue;
- }
- if (ret)
- goto err;
-
- if (ctxt->stats)
- atomic64_add(k.k->size, &ctxt->stats->sectors_seen);
- } else {
- struct btree *b;
-
- b = bch2_backpointer_get_node(trans, &iter, bp_pos, bp);
- ret = PTR_ERR_OR_ZERO(b);
- if (ret == -BCH_ERR_backpointer_to_overwritten_btree_node)
- continue;
- if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
- continue;
- if (ret)
- goto err;
- if (!b)
- goto next;
-
- ret = bch2_btree_node_rewrite(trans, &iter, b, 0);
- bch2_trans_iter_exit(trans, &iter);
-
- if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
- continue;
- if (ret)
- goto err;
-
- if (ctxt->rate)
- bch2_ratelimit_increment(ctxt->rate,
- c->opts.btree_node_size >> 9);
- if (ctxt->stats) {
- atomic64_add(c->opts.btree_node_size >> 9, &ctxt->stats->sectors_seen);
- atomic64_add(c->opts.btree_node_size >> 9, &ctxt->stats->sectors_moved);
- }
- }
-next:
- bp_pos = bpos_nosnap_successor(bp_pos);
- }
-
- trace_evacuate_bucket(c, &bucket, dirty_sectors, bucket_size, fragmentation, ret);
-err:
- bch2_bkey_buf_exit(&sk, c);
- return ret;
-}
-
-typedef bool (*move_btree_pred)(struct bch_fs *, void *,
- struct btree *, struct bch_io_opts *,
- struct data_update_opts *);
-
-static int bch2_move_btree(struct bch_fs *c,
- struct bbpos start,
- struct bbpos end,
- move_btree_pred pred, void *arg,
- struct bch_move_stats *stats)
-{
- bool kthread = (current->flags & PF_KTHREAD) != 0;
- struct bch_io_opts io_opts = bch2_opts_to_inode_opts(c->opts);
- struct moving_context ctxt;
- struct btree_trans *trans;
- struct btree_iter iter;
- struct btree *b;
- enum btree_id btree;
- struct data_update_opts data_opts;
- int ret = 0;
-
- bch2_moving_ctxt_init(&ctxt, c, NULL, stats,
- writepoint_ptr(&c->btree_write_point),
- true);
- trans = ctxt.trans;
-
- stats->data_type = BCH_DATA_btree;
-
- for (btree = start.btree;
- btree <= min_t(unsigned, end.btree, btree_id_nr_alive(c) - 1);
- btree ++) {
- stats->pos = BBPOS(btree, POS_MIN);
-
- if (!bch2_btree_id_root(c, btree)->b)
- continue;
-
- bch2_trans_node_iter_init(trans, &iter, btree, POS_MIN, 0, 0,
- BTREE_ITER_PREFETCH);
-retry:
- ret = 0;
- while (bch2_trans_begin(trans),
- (b = bch2_btree_iter_peek_node(&iter)) &&
- !(ret = PTR_ERR_OR_ZERO(b))) {
- if (kthread && kthread_should_stop())
- break;
-
- if ((cmp_int(btree, end.btree) ?:
- bpos_cmp(b->key.k.p, end.pos)) > 0)
- break;
-
- stats->pos = BBPOS(iter.btree_id, iter.pos);
-
- if (!pred(c, arg, b, &io_opts, &data_opts))
- goto next;
-
- ret = bch2_btree_node_rewrite(trans, &iter, b, 0) ?: ret;
- if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
- continue;
- if (ret)
- break;
-next:
- bch2_btree_iter_next_node(&iter);
- }
- if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
- goto retry;
-
- bch2_trans_iter_exit(trans, &iter);
-
- if (kthread && kthread_should_stop())
- break;
- }
-
- bch_err_fn(c, ret);
- bch2_moving_ctxt_exit(&ctxt);
- bch2_btree_interior_updates_flush(c);
-
- return ret;
-}
-
-static bool rereplicate_pred(struct bch_fs *c, void *arg,
- struct bkey_s_c k,
- struct bch_io_opts *io_opts,
- struct data_update_opts *data_opts)
-{
- unsigned nr_good = bch2_bkey_durability(c, k);
- unsigned replicas = bkey_is_btree_ptr(k.k)
- ? c->opts.metadata_replicas
- : io_opts->data_replicas;
-
- if (!nr_good || nr_good >= replicas)
- return false;
-
- data_opts->target = 0;
- data_opts->extra_replicas = replicas - nr_good;
- data_opts->btree_insert_flags = 0;
- return true;
-}
-
-static bool migrate_pred(struct bch_fs *c, void *arg,
- struct bkey_s_c k,
- struct bch_io_opts *io_opts,
- struct data_update_opts *data_opts)
-{
- struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
- struct bch_ioctl_data *op = arg;
- unsigned i = 0;
-
- data_opts->rewrite_ptrs = 0;
- data_opts->target = 0;
- data_opts->extra_replicas = 0;
- data_opts->btree_insert_flags = 0;
-
- bkey_for_each_ptr(ptrs, ptr) {
- if (ptr->dev == op->migrate.dev)
- data_opts->rewrite_ptrs |= 1U << i;
- i++;
- }
-
- return data_opts->rewrite_ptrs != 0;
-}
-
-static bool rereplicate_btree_pred(struct bch_fs *c, void *arg,
- struct btree *b,
- struct bch_io_opts *io_opts,
- struct data_update_opts *data_opts)
-{
- return rereplicate_pred(c, arg, bkey_i_to_s_c(&b->key), io_opts, data_opts);
-}
-
-static bool migrate_btree_pred(struct bch_fs *c, void *arg,
- struct btree *b,
- struct bch_io_opts *io_opts,
- struct data_update_opts *data_opts)
-{
- return migrate_pred(c, arg, bkey_i_to_s_c(&b->key), io_opts, data_opts);
-}
-
-static bool bformat_needs_redo(struct bkey_format *f)
-{
- unsigned i;
-
- for (i = 0; i < f->nr_fields; i++) {
- unsigned unpacked_bits = bch2_bkey_format_current.bits_per_field[i];
- u64 unpacked_mask = ~((~0ULL << 1) << (unpacked_bits - 1));
- u64 field_offset = le64_to_cpu(f->field_offset[i]);
-
- if (f->bits_per_field[i] > unpacked_bits)
- return true;
-
- if ((f->bits_per_field[i] == unpacked_bits) && field_offset)
- return true;
-
- if (((field_offset + ((1ULL << f->bits_per_field[i]) - 1)) &
- unpacked_mask) <
- field_offset)
- return true;
- }
-
- return false;
-}
-
-static bool rewrite_old_nodes_pred(struct bch_fs *c, void *arg,
- struct btree *b,
- struct bch_io_opts *io_opts,
- struct data_update_opts *data_opts)
-{
- if (b->version_ondisk != c->sb.version ||
- btree_node_need_rewrite(b) ||
- bformat_needs_redo(&b->format)) {
- data_opts->target = 0;
- data_opts->extra_replicas = 0;
- data_opts->btree_insert_flags = 0;
- return true;
- }
-
- return false;
-}
-
-int bch2_scan_old_btree_nodes(struct bch_fs *c, struct bch_move_stats *stats)
-{
- int ret;
-
- ret = bch2_move_btree(c,
- BBPOS_MIN,
- BBPOS_MAX,
- rewrite_old_nodes_pred, c, stats);
- if (!ret) {
- mutex_lock(&c->sb_lock);
- c->disk_sb.sb->compat[0] |= cpu_to_le64(1ULL << BCH_COMPAT_extents_above_btree_updates_done);
- c->disk_sb.sb->compat[0] |= cpu_to_le64(1ULL << BCH_COMPAT_bformat_overflow_done);
- c->disk_sb.sb->version_min = c->disk_sb.sb->version;
- bch2_write_super(c);
- mutex_unlock(&c->sb_lock);
- }
-
- bch_err_fn(c, ret);
- return ret;
-}
-
-static bool drop_extra_replicas_pred(struct bch_fs *c, void *arg,
- struct bkey_s_c k,
- struct bch_io_opts *io_opts,
- struct data_update_opts *data_opts)
-{
- unsigned durability = bch2_bkey_durability(c, k);
- unsigned replicas = bkey_is_btree_ptr(k.k)
- ? c->opts.metadata_replicas
- : io_opts->data_replicas;
- const union bch_extent_entry *entry;
- struct extent_ptr_decoded p;
- unsigned i = 0;
-
- bkey_for_each_ptr_decode(k.k, bch2_bkey_ptrs_c(k), p, entry) {
- unsigned d = bch2_extent_ptr_durability(c, &p);
-
- if (d && durability - d >= replicas) {
- data_opts->kill_ptrs |= BIT(i);
- durability -= d;
- }
-
- i++;
- }
-
- return data_opts->kill_ptrs != 0;
-}
-
-static bool drop_extra_replicas_btree_pred(struct bch_fs *c, void *arg,
- struct btree *b,
- struct bch_io_opts *io_opts,
- struct data_update_opts *data_opts)
-{
- return drop_extra_replicas_pred(c, arg, bkey_i_to_s_c(&b->key), io_opts, data_opts);
-}
-
-int bch2_data_job(struct bch_fs *c,
- struct bch_move_stats *stats,
- struct bch_ioctl_data op)
-{
- struct bbpos start = BBPOS(op.start_btree, op.start_pos);
- struct bbpos end = BBPOS(op.end_btree, op.end_pos);
- int ret = 0;
-
- if (op.op >= BCH_DATA_OP_NR)
- return -EINVAL;
-
- bch2_move_stats_init(stats, bch2_data_ops_strs[op.op]);
-
- switch (op.op) {
- case BCH_DATA_OP_rereplicate:
- stats->data_type = BCH_DATA_journal;
- ret = bch2_journal_flush_device_pins(&c->journal, -1);
- ret = bch2_move_btree(c, start, end,
- rereplicate_btree_pred, c, stats) ?: ret;
- ret = bch2_move_data(c, start, end,
- NULL,
- stats,
- writepoint_hashed((unsigned long) current),
- true,
- rereplicate_pred, c) ?: ret;
- ret = bch2_replicas_gc2(c) ?: ret;
- break;
- case BCH_DATA_OP_migrate:
- if (op.migrate.dev >= c->sb.nr_devices)
- return -EINVAL;
-
- stats->data_type = BCH_DATA_journal;
- ret = bch2_journal_flush_device_pins(&c->journal, op.migrate.dev);
- ret = bch2_move_btree(c, start, end,
- migrate_btree_pred, &op, stats) ?: ret;
- ret = bch2_move_data(c, start, end,
- NULL,
- stats,
- writepoint_hashed((unsigned long) current),
- true,
- migrate_pred, &op) ?: ret;
- ret = bch2_replicas_gc2(c) ?: ret;
- break;
- case BCH_DATA_OP_rewrite_old_nodes:
- ret = bch2_scan_old_btree_nodes(c, stats);
- break;
- case BCH_DATA_OP_drop_extra_replicas:
- ret = bch2_move_btree(c, start, end,
- drop_extra_replicas_btree_pred, c, stats) ?: ret;
- ret = bch2_move_data(c, start, end, NULL, stats,
- writepoint_hashed((unsigned long) current),
- true,
- drop_extra_replicas_pred, c) ?: ret;
- ret = bch2_replicas_gc2(c) ?: ret;
- break;
- default:
- ret = -EINVAL;
- }
-
- bch2_move_stats_exit(stats, c);
- return ret;
-}
-
-void bch2_move_stats_to_text(struct printbuf *out, struct bch_move_stats *stats)
-{
- prt_printf(out, "%s: data type=%s pos=",
- stats->name,
- bch2_data_types[stats->data_type]);
- bch2_bbpos_to_text(out, stats->pos);
- prt_newline(out);
- printbuf_indent_add(out, 2);
-
- prt_str(out, "keys moved: ");
- prt_u64(out, atomic64_read(&stats->keys_moved));
- prt_newline(out);
-
- prt_str(out, "keys raced: ");
- prt_u64(out, atomic64_read(&stats->keys_raced));
- prt_newline(out);
-
- prt_str(out, "bytes seen: ");
- prt_human_readable_u64(out, atomic64_read(&stats->sectors_seen) << 9);
- prt_newline(out);
-
- prt_str(out, "bytes moved: ");
- prt_human_readable_u64(out, atomic64_read(&stats->sectors_moved) << 9);
- prt_newline(out);
-
- prt_str(out, "bytes raced: ");
- prt_human_readable_u64(out, atomic64_read(&stats->sectors_raced) << 9);
- prt_newline(out);
-
- printbuf_indent_sub(out, 2);
-}
-
-static void bch2_moving_ctxt_to_text(struct printbuf *out, struct bch_fs *c, struct moving_context *ctxt)
-{
- struct moving_io *io;
-
- bch2_move_stats_to_text(out, ctxt->stats);
- printbuf_indent_add(out, 2);
-
- prt_printf(out, "reads: ios %u/%u sectors %u/%u",
- atomic_read(&ctxt->read_ios),
- c->opts.move_ios_in_flight,
- atomic_read(&ctxt->read_sectors),
- c->opts.move_bytes_in_flight >> 9);
- prt_newline(out);
-
- prt_printf(out, "writes: ios %u/%u sectors %u/%u",
- atomic_read(&ctxt->write_ios),
- c->opts.move_ios_in_flight,
- atomic_read(&ctxt->write_sectors),
- c->opts.move_bytes_in_flight >> 9);
- prt_newline(out);
-
- printbuf_indent_add(out, 2);
-
- mutex_lock(&ctxt->lock);
- list_for_each_entry(io, &ctxt->ios, io_list)
- bch2_write_op_to_text(out, &io->write.op);
- mutex_unlock(&ctxt->lock);
-
- printbuf_indent_sub(out, 4);
-}
-
-void bch2_fs_moving_ctxts_to_text(struct printbuf *out, struct bch_fs *c)
-{
- struct moving_context *ctxt;
-
- mutex_lock(&c->moving_context_lock);
- list_for_each_entry(ctxt, &c->moving_context_list, list)
- bch2_moving_ctxt_to_text(out, c, ctxt);
- mutex_unlock(&c->moving_context_lock);
-}
-
-void bch2_fs_move_init(struct bch_fs *c)
-{
- INIT_LIST_HEAD(&c->moving_context_list);
- mutex_init(&c->moving_context_lock);
-}
projects / bcachefs-tools-debian / blobdiff