// 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 "buckets.h"
+#include "btree_write_buffer.h"
#include "disk_groups.h"
+#include "ec.h"
+#include "errcode.h"
+#include "error.h"
#include "inode.h"
-#include "io.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 "keylist.h"
+#include "trace.h"
#include <linux/ioprio.h>
#include <linux/kthread.h>
-#include <trace/events/bcachefs.h>
-
-#define SECTORS_IN_FLIGHT_PER_DEVICE 2048
-
-struct moving_io {
- struct list_head list;
- struct closure cl;
- bool read_completed;
-
- unsigned read_sectors;
- unsigned write_sectors;
-
- struct bch_read_bio rbio;
-
- struct migrate_write write;
- /* Must be last since it is variable size */
- struct bio_vec bi_inline_vecs[0];
-};
-
-struct moving_context {
- /* Closure for waiting on all reads and writes to complete */
- struct closure cl;
-
- struct bch_move_stats *stats;
-
- struct list_head reads;
-
- /* in flight sectors: */
- atomic_t read_sectors;
- atomic_t write_sectors;
-
- wait_queue_head_t wait;
+const char * const bch2_data_ops_strs[] = {
+#define x(t, n, ...) [n] = #t,
+ BCH_DATA_OPS()
+#undef x
+ NULL
};
-static int bch2_migrate_index_update(struct bch_write_op *op)
+static void trace_move_extent2(struct bch_fs *c, struct bkey_s_c k)
{
- struct bch_fs *c = op->c;
- struct btree_trans trans;
- struct btree_iter *iter;
- struct migrate_write *m =
- container_of(op, struct migrate_write, op);
- struct keylist *keys = &op->insert_keys;
- struct bkey_buf _new, _insert;
- int ret = 0;
-
- bch2_bkey_buf_init(&_new);
- bch2_bkey_buf_init(&_insert);
- bch2_bkey_buf_realloc(&_insert, c, U8_MAX);
-
- bch2_trans_init(&trans, c, BTREE_ITER_MAX, 0);
-
- iter = bch2_trans_get_iter(&trans, m->btree_id,
- bkey_start_pos(&bch2_keylist_front(keys)->k),
- BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
-
- while (1) {
- struct bkey_s_c k;
- struct bkey_i *insert;
- struct bkey_i_extent *new;
- const union bch_extent_entry *entry;
- struct extent_ptr_decoded p;
- bool did_work = false;
- bool extending = false, should_check_enospc;
- s64 i_sectors_delta = 0, disk_sectors_delta = 0;
-
- bch2_trans_reset(&trans, 0);
-
- k = bch2_btree_iter_peek_slot(iter);
- ret = bkey_err(k);
- if (ret)
- goto err;
-
- new = bkey_i_to_extent(bch2_keylist_front(keys));
-
- if (bversion_cmp(k.k->version, new->k.version) ||
- !bch2_bkey_matches_ptr(c, k, m->ptr, m->offset))
- goto nomatch;
-
- bkey_reassemble(_insert.k, k);
- insert = _insert.k;
-
- bch2_bkey_buf_copy(&_new, c, bch2_keylist_front(keys));
- new = bkey_i_to_extent(_new.k);
- bch2_cut_front(iter->pos, &new->k_i);
-
- bch2_cut_front(iter->pos, insert);
- bch2_cut_back(new->k.p, insert);
- bch2_cut_back(insert->k.p, &new->k_i);
-
- if (m->data_cmd == DATA_REWRITE) {
- struct bch_extent_ptr *new_ptr, *old_ptr = (void *)
- bch2_bkey_has_device(bkey_i_to_s_c(insert),
- m->data_opts.rewrite_dev);
- if (!old_ptr)
- goto nomatch;
-
- if (old_ptr->cached)
- extent_for_each_ptr(extent_i_to_s(new), new_ptr)
- new_ptr->cached = true;
-
- bch2_bkey_drop_ptr(bkey_i_to_s(insert), old_ptr);
- }
-
- extent_for_each_ptr_decode(extent_i_to_s(new), p, entry) {
- if (bch2_bkey_has_device(bkey_i_to_s_c(insert), p.ptr.dev)) {
- /*
- * raced with another move op? extent already
- * has a pointer to the device we just wrote
- * data to
- */
- continue;
- }
-
- bch2_extent_ptr_decoded_append(insert, &p);
- did_work = true;
- }
-
- if (!did_work)
- goto nomatch;
-
- bch2_bkey_narrow_crcs(insert,
- (struct bch_extent_crc_unpacked) { 0 });
- bch2_extent_normalize(c, bkey_i_to_s(insert));
- bch2_bkey_mark_replicas_cached(c, bkey_i_to_s(insert),
- op->opts.background_target,
- op->opts.data_replicas);
-
- ret = bch2_sum_sector_overwrites(&trans, iter, insert,
- &extending,
- &should_check_enospc,
- &i_sectors_delta,
- &disk_sectors_delta);
- if (ret)
- goto err;
+ if (trace_move_extent_enabled()) {
+ struct printbuf buf = PRINTBUF;
- if (disk_sectors_delta > (s64) op->res.sectors) {
- ret = bch2_disk_reservation_add(c, &op->res,
- disk_sectors_delta - op->res.sectors,
- !should_check_enospc
- ? BCH_DISK_RESERVATION_NOFAIL : 0);
- if (ret)
- goto out;
- }
-
- bch2_trans_update(&trans, iter, insert, 0);
-
- ret = bch2_trans_commit(&trans, &op->res,
- op_journal_seq(op),
- BTREE_INSERT_NOFAIL|
- m->data_opts.btree_insert_flags);
-err:
- if (!ret)
- atomic_long_inc(&c->extent_migrate_done);
- if (ret == -EINTR)
- ret = 0;
- if (ret)
- break;
-next:
- while (bkey_cmp(iter->pos, bch2_keylist_front(keys)->k.p) >= 0) {
- bch2_keylist_pop_front(keys);
- if (bch2_keylist_empty(keys))
- goto out;
- }
- continue;
-nomatch:
- if (m->ctxt) {
- BUG_ON(k.k->p.offset <= iter->pos.offset);
- atomic64_inc(&m->ctxt->stats->keys_raced);
- atomic64_add(k.k->p.offset - iter->pos.offset,
- &m->ctxt->stats->sectors_raced);
- }
- atomic_long_inc(&c->extent_migrate_raced);
- trace_move_race(&new->k);
- bch2_btree_iter_next_slot(iter);
- goto next;
+ bch2_bkey_val_to_text(&buf, c, k);
+ trace_move_extent(c, buf.buf);
+ printbuf_exit(&buf);
}
-out:
- bch2_trans_exit(&trans);
- bch2_bkey_buf_exit(&_insert, c);
- bch2_bkey_buf_exit(&_new, c);
- BUG_ON(ret == -EINTR);
- return ret;
}
-void bch2_migrate_read_done(struct migrate_write *m, struct bch_read_bio *rbio)
+static void trace_move_extent_read2(struct bch_fs *c, struct bkey_s_c k)
{
- /* write bio must own pages: */
- BUG_ON(!m->op.wbio.bio.bi_vcnt);
-
- m->ptr = rbio->pick.ptr;
- m->offset = rbio->pos.offset - rbio->pick.crc.offset;
- m->op.devs_have = rbio->devs_have;
- m->op.pos = rbio->pos;
- m->op.version = rbio->version;
- m->op.crc = rbio->pick.crc;
- m->op.wbio.bio.bi_iter.bi_size = m->op.crc.compressed_size << 9;
+ if (trace_move_extent_read_enabled()) {
+ struct printbuf buf = PRINTBUF;
- if (bch2_csum_type_is_encryption(m->op.crc.csum_type)) {
- m->op.nonce = m->op.crc.nonce + m->op.crc.offset;
- m->op.csum_type = m->op.crc.csum_type;
+ bch2_bkey_val_to_text(&buf, c, k);
+ trace_move_extent_read(c, buf.buf);
+ printbuf_exit(&buf);
}
-
- if (m->data_cmd == DATA_REWRITE)
- bch2_dev_list_drop_dev(&m->op.devs_have, m->data_opts.rewrite_dev);
}
-int bch2_migrate_write_init(struct bch_fs *c, struct migrate_write *m,
- struct write_point_specifier wp,
- struct bch_io_opts io_opts,
- enum data_cmd data_cmd,
- struct data_opts data_opts,
- enum btree_id btree_id,
- struct bkey_s_c k)
-{
- struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
- const union bch_extent_entry *entry;
- struct extent_ptr_decoded p;
- int ret;
-
- m->btree_id = btree_id;
- m->data_cmd = data_cmd;
- m->data_opts = data_opts;
- m->nr_ptrs_reserved = 0;
-
- bch2_write_op_init(&m->op, c, io_opts);
-
- if (!bch2_bkey_is_incompressible(k))
- m->op.compression_type =
- bch2_compression_opt_to_type[io_opts.background_compression ?:
- io_opts.compression];
- else
- m->op.incompressible = true;
-
- m->op.target = data_opts.target,
- m->op.write_point = wp;
-
- if (m->data_opts.btree_insert_flags & BTREE_INSERT_USE_RESERVE) {
- m->op.alloc_reserve = RESERVE_MOVINGGC;
- m->op.flags |= BCH_WRITE_ALLOC_NOWAIT;
- } else {
- /* XXX: this should probably be passed in */
- m->op.flags |= BCH_WRITE_ONLY_SPECIFIED_DEVS;
- }
-
- m->op.flags |= BCH_WRITE_PAGES_STABLE|
- BCH_WRITE_PAGES_OWNED|
- BCH_WRITE_DATA_ENCODED|
- BCH_WRITE_FROM_INTERNAL;
-
- m->op.nr_replicas = data_opts.nr_replicas;
- m->op.nr_replicas_required = data_opts.nr_replicas;
- m->op.index_update_fn = bch2_migrate_index_update;
-
- switch (data_cmd) {
- case DATA_ADD_REPLICAS: {
- /*
- * DATA_ADD_REPLICAS is used for moving data to a different
- * device in the background, and due to compression the new copy
- * might take up more space than the old copy:
- */
-#if 0
- int nr = (int) io_opts.data_replicas -
- bch2_bkey_nr_ptrs_allocated(k);
-#endif
- int nr = (int) io_opts.data_replicas;
+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;
- if (nr > 0) {
- m->op.nr_replicas = m->nr_ptrs_reserved = nr;
+ unsigned read_sectors;
+ unsigned write_sectors;
- ret = bch2_disk_reservation_get(c, &m->op.res,
- k.k->size, m->op.nr_replicas, 0);
- if (ret)
- return ret;
- }
- break;
- }
- case DATA_REWRITE: {
- unsigned compressed_sectors = 0;
-
- bkey_for_each_ptr_decode(k.k, ptrs, p, entry)
- if (p.ptr.dev == data_opts.rewrite_dev &&
- !p.ptr.cached &&
- crc_is_compressed(p.crc))
- compressed_sectors += p.crc.compressed_size;
-
- if (compressed_sectors) {
- ret = bch2_disk_reservation_add(c, &m->op.res,
- k.k->size * m->op.nr_replicas,
- BCH_DISK_RESERVATION_NOFAIL);
- if (ret)
- return ret;
- }
- break;
- }
- case DATA_PROMOTE:
- m->op.flags |= BCH_WRITE_ALLOC_NOWAIT;
- m->op.flags |= BCH_WRITE_CACHED;
- break;
- default:
- BUG();
- }
+ struct bch_read_bio rbio;
- return 0;
-}
+ struct data_update write;
+ /* Must be last since it is variable size */
+ struct bio_vec bi_inline_vecs[];
+};
-static void move_free(struct closure *cl)
+static void move_free(struct moving_io *io)
{
- struct moving_io *io = container_of(cl, struct moving_io, cl);
struct moving_context *ctxt = io->write.ctxt;
- struct bvec_iter_all iter;
- struct bio_vec *bv;
- bch2_disk_reservation_put(io->write.op.c, &io->write.op.res);
+ if (io->b)
+ atomic_dec(&io->b->count);
- bio_for_each_segment_all(bv, &io->write.op.wbio.bio, iter)
- if (bv->bv_page)
- __free_page(bv->bv_page);
+ 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 closure *cl)
+static void move_write_done(struct bch_write_op *op)
{
- struct moving_io *io = container_of(cl, struct moving_io, cl);
+ 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);
- closure_return_with_destructor(cl, move_free);
+ atomic_dec(&io->write.ctxt->write_ios);
+ move_free(io);
+ closure_put(&ctxt->cl);
}
-static void move_write(struct closure *cl)
+static void move_write(struct moving_io *io)
{
- struct moving_io *io = container_of(cl, struct moving_io, cl);
-
if (unlikely(io->rbio.bio.bi_status || io->rbio.hole)) {
- closure_return_with_destructor(cl, move_free);
+ move_free(io);
return;
}
- bch2_migrate_read_done(&io->write, &io->rbio);
-
+ closure_get(&io->write.ctxt->cl);
atomic_add(io->write_sectors, &io->write.ctxt->write_sectors);
- closure_call(&io->write.op.cl, bch2_write, NULL, cl);
- continue_at(cl, move_write_done, NULL);
+ atomic_inc(&io->write.ctxt->write_ios);
+
+ bch2_data_update_read_done(&io->write, io->rbio.pick.crc);
}
-static inline struct moving_io *next_pending_write(struct moving_context *ctxt)
+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, list);
+ list_first_entry_or_null(&ctxt->reads, struct moving_io, read_list);
return io && io->read_completed ? io : NULL;
}
struct moving_context *ctxt = io->write.ctxt;
atomic_sub(io->read_sectors, &ctxt->read_sectors);
+ atomic_dec(&ctxt->read_ios);
io->read_completed = true;
- if (next_pending_write(ctxt))
- wake_up(&ctxt->wait);
-
+ wake_up(&ctxt->wait);
closure_put(&ctxt->cl);
}
-static void do_pending_writes(struct moving_context *ctxt)
+void bch2_moving_ctxt_do_pending_writes(struct moving_context *ctxt)
{
struct moving_io *io;
- while ((io = next_pending_write(ctxt))) {
- list_del(&io->list);
- closure_call(&io->cl, move_write, NULL, &ctxt->cl);
+ while ((io = bch2_moving_ctxt_next_pending_write(ctxt))) {
+ bch2_trans_unlock_long(ctxt->trans);
+ list_del(&io->read_list);
+ move_write(io);
}
}
-#define move_ctxt_wait_event(_ctxt, _cond) \
-do { \
- do_pending_writes(_ctxt); \
- \
- if (_cond) \
- break; \
- __wait_event((_ctxt)->wait, \
- next_pending_write(_ctxt) || (_cond)); \
-} while (1)
-
-static void bch2_move_ctxt_wait_for_io(struct moving_context *ctxt)
+void bch2_move_ctxt_wait_for_io(struct moving_context *ctxt)
{
unsigned sectors_pending = atomic_read(&ctxt->write_sectors);
atomic_read(&ctxt->write_sectors) != sectors_pending);
}
-static int bch2_move_extent(struct btree_trans *trans,
- struct moving_context *ctxt,
- struct write_point_specifier wp,
- struct bch_io_opts io_opts,
- enum btree_id btree_id,
- struct bkey_s_c k,
- enum data_cmd data_cmd,
- struct data_opts data_opts)
+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;
unsigned sectors = k.k->size, pages;
int ret = -ENOMEM;
- move_ctxt_wait_event(ctxt,
- atomic_read(&ctxt->write_sectors) <
- SECTORS_IN_FLIGHT_PER_DEVICE);
+ if (ctxt->stats)
+ ctxt->stats->pos = BBPOS(iter->btree_id, iter->pos);
+ trace_move_extent2(c, k);
- move_ctxt_wait_event(ctxt,
- atomic_read(&ctxt->read_sectors) <
- SECTORS_IN_FLIGHT_PER_DEVICE);
+ 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)
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, io->bi_inline_vecs, pages);
+ 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));
io->rbio.c = c;
io->rbio.opts = io_opts;
- bio_init(&io->rbio.bio, io->bi_inline_vecs, pages);
+ 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;
- bio_set_op_attrs(&io->rbio.bio, REQ_OP_READ, 0);
+ 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_migrate_write_init(c, &io->write, wp, io_opts,
- data_cmd, data_opts, btree_id, k);
+ 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;
- atomic64_inc(&ctxt->stats->keys_moved);
- atomic64_add(k.k->size, &ctxt->stats->sectors_moved);
+ 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);
+ }
- trace_move_extent(k.k);
+ 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);
- list_add_tail(&io->list, &ctxt->reads);
+ 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, k, 0,
+ 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:
kfree(io);
err:
- trace_move_alloc_fail(k.k);
+ 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;
}
-static int __bch2_move_data(struct bch_fs *c,
- struct moving_context *ctxt,
- struct bch_ratelimit *rate,
- struct write_point_specifier wp,
- struct bpos start,
- struct bpos end,
- move_pred_fn pred, void *arg,
- struct bch_move_stats *stats,
- enum btree_id btree_id)
+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)
{
- bool kthread = (current->flags & PF_KTHREAD) != 0;
- struct bch_io_opts io_opts = bch2_opts_to_inode_opts(c->opts);
- struct bkey_buf sk;
- struct btree_trans trans;
- struct btree_iter *iter;
+ 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;
- struct data_opts data_opts;
- enum data_cmd data_cmd;
- u64 delay, cur_inum = U64_MAX;
- int ret = 0, ret2;
+ int ret;
- bch2_bkey_buf_init(&sk);
- bch2_trans_init(&trans, c, 0, 0);
+ /* reflink btree? */
+ if (!extent_k.k->p.inode) {
+ *io_opts = bch2_opts_to_inode_opts(trans->c->opts);
+ return 0;
+ }
- stats->data_type = BCH_DATA_user;
- stats->btree_id = btree_id;
- stats->pos = POS_MIN;
+ 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);
+ }
- iter = bch2_trans_get_iter(&trans, btree_id, start,
- BTREE_ITER_PREFETCH);
+ bch2_trans_iter_exit(trans, &iter);
+ return 0;
+}
- if (rate)
- bch2_ratelimit_reset(rate);
+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()));
+ }
- while (1) {
- do {
- delay = rate ? bch2_ratelimit_delay(rate) : 0;
+ do {
+ delay = ctxt->rate ? bch2_ratelimit_delay(ctxt->rate) : 0;
- if (delay) {
- bch2_trans_unlock(&trans);
- set_current_state(TASK_INTERRUPTIBLE);
- }
+ if (is_kthread && kthread_should_stop())
+ return 1;
- if (kthread && (ret = kthread_should_stop())) {
- __set_current_state(TASK_RUNNING);
- goto out;
- }
+ if (delay)
+ move_ctxt_wait_event_timeout(ctxt,
+ freezing(current) ||
+ (is_kthread && kthread_should_stop()),
+ delay);
- if (delay)
- schedule_timeout(delay);
+ if (unlikely(freezing(current))) {
+ bch2_moving_ctxt_flush_all(ctxt);
+ try_to_freeze();
+ }
+ } while (delay);
- if (unlikely(freezing(current))) {
- bch2_trans_unlock(&trans);
- move_ctxt_wait_event(ctxt, list_empty(&ctxt->reads));
- try_to_freeze();
- }
- } while (delay);
-peek:
- k = bch2_btree_iter_peek(iter);
+ /*
+ * 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);
- stats->pos = iter->pos;
+ 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_cmp(bkey_start_pos(k.k), end) >= 0)
+
+ 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;
- if (btree_id == BTREE_ID_EXTENTS &&
- cur_inum != k.k->p.inode) {
- struct bch_inode_unpacked inode;
-
- /* don't hold btree locks while looking up inode: */
- bch2_trans_unlock(&trans);
-
- io_opts = bch2_opts_to_inode_opts(c->opts);
- if (!bch2_inode_find_by_inum(c, k.k->p.inode, &inode))
- bch2_io_opts_apply(&io_opts, bch2_inode_opts_get(&inode));
- cur_inum = k.k->p.inode;
- goto peek;
- }
+ io_opts = bch2_move_get_io_opts(trans, &snapshot_io_opts, k);
+ ret = PTR_ERR_OR_ZERO(io_opts);
+ if (ret)
+ continue;
- switch ((data_cmd = pred(c, arg, k, &io_opts, &data_opts))) {
- case DATA_SKIP:
+ memset(&data_opts, 0, sizeof(data_opts));
+ if (!pred(c, arg, k, io_opts, &data_opts))
goto next;
- case DATA_SCRUB:
- BUG();
- case DATA_ADD_REPLICAS:
- case DATA_REWRITE:
- case DATA_PROMOTE:
- break;
- default:
- BUG();
- }
- /* unlock before doing IO: */
+ /*
+ * 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);
- bch2_trans_unlock(&trans);
- ret2 = bch2_move_extent(&trans, ctxt, wp, io_opts, btree_id, k,
- data_cmd, data_opts);
+ ret2 = bch2_move_extent(ctxt, NULL, &iter, k, *io_opts, data_opts);
if (ret2) {
- if (ret2 == -EINTR) {
- bch2_trans_reset(&trans, 0);
- bch2_trans_cond_resched(&trans);
+ if (bch2_err_matches(ret2, BCH_ERR_transaction_restart))
continue;
- }
if (ret2 == -ENOMEM) {
/* memory allocation failure, wait for some IO to finish */
/* XXX signal failure */
goto next;
}
-
- if (rate)
- bch2_ratelimit_increment(rate, k.k->size);
next:
- atomic64_add(k.k->size * bch2_bkey_nr_ptrs_allocated(k),
- &stats->sectors_seen);
+ if (ctxt->stats)
+ atomic64_add(k.k->size, &ctxt->stats->sectors_seen);
next_nondata:
- bch2_btree_iter_next(iter);
- bch2_trans_cond_resched(&trans);
+ bch2_btree_iter_advance(&iter);
}
-out:
- ret = bch2_trans_exit(&trans) ?: ret;
+
+ 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,
- struct bpos start,
- struct bpos end,
- move_pred_fn pred, void *arg,
- struct bch_move_stats *stats)
+ bool wait_on_copygc,
+ move_pred_fn pred, void *arg)
{
- struct moving_context ctxt = { .stats = stats };
+
+ struct moving_context ctxt;
int ret;
- closure_init_stack(&ctxt.cl);
- INIT_LIST_HEAD(&ctxt.reads);
- init_waitqueue_head(&ctxt.wait);
+ 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);
- stats->data_type = BCH_DATA_user;
+ 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);
- ret = __bch2_move_data(c, &ctxt, rate, wp, start, end,
- pred, arg, stats, BTREE_ID_EXTENTS) ?:
- __bch2_move_data(c, &ctxt, rate, wp, start, end,
- pred, arg, stats, BTREE_ID_REFLINK);
+ 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);
- move_ctxt_wait_event(&ctxt, list_empty(&ctxt.reads));
- closure_sync(&ctxt.cl);
+ 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;
- EBUG_ON(atomic_read(&ctxt.write_sectors));
+ ret = bch2_btree_node_rewrite(trans, &iter, b, 0);
+ bch2_trans_iter_exit(trans, &iter);
- trace_move_data(c,
- atomic64_read(&stats->sectors_moved),
- atomic64_read(&stats->keys_moved));
+ 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,
- move_pred_fn pred,
- void *arg,
+ 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 btree_trans trans;
- struct btree_iter *iter;
+ struct moving_context ctxt;
+ struct btree_trans *trans;
+ struct btree_iter iter;
struct btree *b;
- unsigned id;
- struct data_opts data_opts;
- enum data_cmd cmd;
+ enum btree_id btree;
+ struct data_update_opts data_opts;
int ret = 0;
- bch2_trans_init(&trans, c, 0, 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 (id = 0; id < BTREE_ID_NR; id++) {
- stats->btree_id = id;
+ 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;
- for_each_btree_node(&trans, iter, id, POS_MIN,
- BTREE_ITER_PREFETCH, b) {
- stats->pos = iter->pos;
+ if ((cmp_int(btree, end.btree) ?:
+ bpos_cmp(b->key.k.p, end.pos)) > 0)
+ break;
- switch ((cmd = pred(c, arg,
- bkey_i_to_s_c(&b->key),
- &io_opts, &data_opts))) {
- case DATA_SKIP:
+ stats->pos = BBPOS(iter.btree_id, iter.pos);
+
+ if (!pred(c, arg, b, &io_opts, &data_opts))
goto next;
- case DATA_SCRUB:
- BUG();
- case DATA_ADD_REPLICAS:
- case DATA_REWRITE:
- break;
- default:
- BUG();
- }
- ret = bch2_btree_node_rewrite(c, iter,
- b->data->keys.seq, 0) ?: ret;
+ 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_trans_cond_resched(&trans);
+ bch2_btree_iter_next_node(&iter);
}
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
- ret = bch2_trans_iter_free(&trans, iter) ?: ret;
+ bch2_trans_iter_exit(trans, &iter);
+
+ if (kthread && kthread_should_stop())
+ break;
}
- bch2_trans_exit(&trans);
+ bch_err_fn(c, ret);
+ bch2_moving_ctxt_exit(&ctxt);
+ bch2_btree_interior_updates_flush(c);
return ret;
}
-#if 0
-static enum data_cmd scrub_pred(struct bch_fs *c, void *arg,
- struct bkey_s_c k,
- struct bch_io_opts *io_opts,
- struct data_opts *data_opts)
-{
- return DATA_SCRUB;
-}
-#endif
-
-static enum data_cmd rereplicate_pred(struct bch_fs *c, void *arg,
- struct bkey_s_c k,
- struct bch_io_opts *io_opts,
- struct data_opts *data_opts)
+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 = 0;
-
- switch (k.k->type) {
- case KEY_TYPE_btree_ptr:
- replicas = c->opts.metadata_replicas;
- break;
- case KEY_TYPE_extent:
- replicas = io_opts->data_replicas;
- break;
- }
+ unsigned replicas = bkey_is_btree_ptr(k.k)
+ ? c->opts.metadata_replicas
+ : io_opts->data_replicas;
if (!nr_good || nr_good >= replicas)
- return DATA_SKIP;
+ return false;
data_opts->target = 0;
- data_opts->nr_replicas = 1;
+ data_opts->extra_replicas = replicas - nr_good;
data_opts->btree_insert_flags = 0;
- return DATA_ADD_REPLICAS;
+ return true;
}
-static enum data_cmd migrate_pred(struct bch_fs *c, void *arg,
- struct bkey_s_c k,
- struct bch_io_opts *io_opts,
- struct data_opts *data_opts)
+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;
- if (!bch2_bkey_has_device(k, op->migrate.dev))
- return DATA_SKIP;
-
+ data_opts->rewrite_ptrs = 0;
data_opts->target = 0;
- data_opts->nr_replicas = 1;
+ data_opts->extra_replicas = 0;
data_opts->btree_insert_flags = 0;
- data_opts->rewrite_dev = op->migrate.dev;
- return DATA_REWRITE;
+
+ 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:
+ 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, rereplicate_pred, c, stats) ?: ret;
-
- closure_wait_event(&c->btree_interior_update_wait,
- !bch2_btree_interior_updates_nr_pending(c));
-
- ret = bch2_replicas_gc2(c) ?: ret;
-
- ret = bch2_move_data(c, NULL,
+ 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),
- op.start,
- op.end,
- rereplicate_pred, c, stats) ?: ret;
+ true,
+ rereplicate_pred, c) ?: ret;
ret = bch2_replicas_gc2(c) ?: ret;
break;
- case BCH_DATA_OP_MIGRATE:
+ 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, migrate_pred, &op, stats) ?: ret;
- ret = bch2_replicas_gc2(c) ?: ret;
-
- ret = bch2_move_data(c, NULL,
+ 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),
- op.start,
- op.end,
- migrate_pred, &op, stats) ?: ret;
+ 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