+// SPDX-License-Identifier: GPL-2.0
#include "bcachefs.h"
+#include "alloc_foreground.h"
+#include "bkey_buf.h"
#include "btree_gc.h"
#include "btree_update.h"
+#include "btree_update_interior.h"
#include "buckets.h"
+#include "disk_groups.h"
+#include "ec.h"
#include "inode.h"
#include "io.h"
+#include "journal_reclaim.h"
#include "move.h"
+#include "replicas.h"
+#include "subvolume.h"
#include "super-io.h"
#include "keylist.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 sectors;
+
+ unsigned read_sectors;
+ unsigned write_sectors;
struct bch_read_bio rbio;
struct bch_move_stats *stats;
struct list_head reads;
- atomic_t sectors_in_flight;
+
+ /* in flight sectors: */
+ atomic_t read_sectors;
+ atomic_t write_sectors;
+
wait_queue_head_t wait;
};
+static int insert_snapshot_whiteouts(struct btree_trans *trans,
+ enum btree_id id,
+ struct bpos old_pos,
+ struct bpos new_pos)
+{
+ struct bch_fs *c = trans->c;
+ struct btree_iter iter, update_iter;
+ struct bkey_s_c k;
+ struct snapshots_seen s;
+ int ret;
+
+ if (!btree_type_has_snapshots(id))
+ return 0;
+
+ snapshots_seen_init(&s);
+
+ if (!bkey_cmp(old_pos, new_pos))
+ return 0;
+
+ if (!snapshot_t(c, old_pos.snapshot)->children[0])
+ return 0;
+
+ bch2_trans_iter_init(trans, &iter, id, old_pos,
+ BTREE_ITER_NOT_EXTENTS|
+ BTREE_ITER_ALL_SNAPSHOTS);
+ while (1) {
+next:
+ k = bch2_btree_iter_prev(&iter);
+ ret = bkey_err(k);
+ if (ret)
+ break;
+
+ if (bkey_cmp(old_pos, k.k->p))
+ break;
+
+ if (bch2_snapshot_is_ancestor(c, k.k->p.snapshot, old_pos.snapshot)) {
+ struct bkey_i *update;
+ size_t i;
+
+ for (i = 0; i < s.nr; i++)
+ if (bch2_snapshot_is_ancestor(c, k.k->p.snapshot, s.d[i]))
+ goto next;
+
+ update = bch2_trans_kmalloc(trans, sizeof(struct bkey_i));
+
+ ret = PTR_ERR_OR_ZERO(update);
+ if (ret)
+ break;
+
+ bkey_init(&update->k);
+ update->k.p = new_pos;
+ update->k.p.snapshot = k.k->p.snapshot;
+
+ bch2_trans_iter_init(trans, &update_iter, id, update->k.p,
+ BTREE_ITER_NOT_EXTENTS|
+ BTREE_ITER_ALL_SNAPSHOTS|
+ BTREE_ITER_INTENT);
+ ret = bch2_btree_iter_traverse(&update_iter) ?:
+ bch2_trans_update(trans, &update_iter, update,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
+ bch2_trans_iter_exit(trans, &update_iter);
+ if (ret)
+ break;
+
+ ret = snapshots_seen_add(c, &s, k.k->p.snapshot);
+ if (ret)
+ break;
+ }
+ }
+ bch2_trans_iter_exit(trans, &iter);
+ kfree(s.d);
+
+ return ret;
+}
+
static int bch2_migrate_index_update(struct bch_write_op *op)
{
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 open_bucket *ec_ob = ec_open_bucket(c, &op->open_buckets);
struct keylist *keys = &op->insert_keys;
- struct btree_iter iter;
+ struct bkey_buf _new, _insert;
int ret = 0;
- bch2_btree_iter_init(&iter, c, BTREE_ID_EXTENTS,
+ 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, 1024);
+
+ bch2_trans_iter_init(&trans, &iter, m->btree_id,
bkey_start_pos(&bch2_keylist_front(keys)->k),
BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
while (1) {
- struct bkey_s_c k = bch2_btree_iter_peek_slot(&iter);
- struct bkey_i_extent *insert, *new =
- bkey_i_to_extent(bch2_keylist_front(keys));
- BKEY_PADDED(k) _new, _insert;
- struct bch_extent_ptr *ptr;
- struct bch_extent_crc_unpacked crc;
+ 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;
+ struct bpos next_pos;
bool did_work = false;
+ bool should_check_enospc;
+ s64 i_sectors_delta = 0, disk_sectors_delta = 0;
- if (btree_iter_err(k)) {
- ret = bch2_btree_iter_unlock(&iter);
- break;
- }
+ bch2_trans_begin(&trans);
+
+ 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) ||
- !bkey_extent_is_data(k.k) ||
- !bch2_extent_matches_ptr(c, bkey_s_c_to_extent(k),
- m->ptr, m->offset))
+ !bch2_bkey_matches_ptr(c, k, m->ptr, m->offset))
goto nomatch;
- bkey_reassemble(&_insert.k, k);
- insert = bkey_i_to_extent(&_insert.k);
+ 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);
- bkey_copy(&_new.k, bch2_keylist_front(keys));
- new = bkey_i_to_extent(&_new.k);
+ bch2_cut_front(iter.pos, insert);
+ bch2_cut_back(new->k.p, insert);
+ bch2_cut_back(insert->k.p, &new->k_i);
- bch2_cut_front(iter.pos, &insert->k_i);
- bch2_cut_back(new->k.p, &insert->k);
- bch2_cut_back(insert->k.p, &new->k);
+ 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 (m->move_dev >= 0 &&
- (ptr = (struct bch_extent_ptr *)
- bch2_extent_has_device(extent_i_to_s_c(insert),
- m->move_dev)))
- bch2_extent_drop_ptr(extent_i_to_s(insert), ptr);
+ 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_crc(extent_i_to_s(new), ptr, crc) {
- if (bch2_extent_has_device(extent_i_to_s_c(insert), ptr->dev)) {
+ 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
continue;
}
- bch2_extent_crc_append(insert, crc);
- extent_ptr_append(insert, *ptr);
+ bch2_extent_ptr_decoded_append(insert, &p);
did_work = true;
}
if (!did_work)
goto nomatch;
- bch2_extent_narrow_crcs(insert,
+ bch2_bkey_narrow_crcs(insert,
(struct bch_extent_crc_unpacked) { 0 });
- bch2_extent_normalize(c, extent_i_to_s(insert).s);
- bch2_extent_mark_replicas_cached(c, extent_i_to_s(insert));
-
- ret = bch2_check_mark_super(c, BCH_DATA_USER,
- bch2_extent_devs(extent_i_to_s_c(insert)));
+ 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,
+ &should_check_enospc,
+ &i_sectors_delta,
+ &disk_sectors_delta);
if (ret)
- break;
+ goto err;
+
+ 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;
+ }
- ret = bch2_btree_insert_at(c, &op->res,
- NULL, op_journal_seq(op),
- BTREE_INSERT_ATOMIC|
+ next_pos = insert->k.p;
+
+ ret = insert_snapshot_whiteouts(&trans, m->btree_id,
+ k.k->p, insert->k.p) ?:
+ bch2_trans_update(&trans, &iter, insert,
+ BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) ?:
+ bch2_trans_commit(&trans, &op->res,
+ op_journal_seq(op),
BTREE_INSERT_NOFAIL|
- m->btree_insert_flags,
- BTREE_INSERT_ENTRY(&iter, &insert->k_i));
- if (!ret)
+ m->data_opts.btree_insert_flags);
+ if (!ret) {
+ bch2_btree_iter_set_pos(&iter, next_pos);
atomic_long_inc(&c->extent_migrate_done);
+ if (ec_ob)
+ bch2_ob_add_backpointer(c, ec_ob, &insert->k);
+ }
+err:
if (ret == -EINTR)
ret = 0;
if (ret)
if (bch2_keylist_empty(keys))
goto out;
}
-
- bch2_cut_front(iter.pos, bch2_keylist_front(keys));
continue;
nomatch:
- if (m->ctxt)
+ 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);
+ bch2_btree_iter_advance(&iter);
goto next;
}
out:
- bch2_btree_iter_unlock(&iter);
+ bch2_trans_iter_exit(&trans, &iter);
+ 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_write_init(struct migrate_write *m,
- struct bch_read_bio *rbio)
+void bch2_migrate_read_done(struct migrate_write *m, struct bch_read_bio *rbio)
{
/* 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->offset = rbio->data_pos.offset - rbio->pick.crc.offset;
m->op.devs_have = rbio->devs_have;
- m->op.pos = rbio->pos;
+ m->op.pos = rbio->data_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 (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;
- }
+ 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 bch_extent_crc_unpacked crc;
+ struct extent_ptr_decoded p;
+ int ret;
- if (m->move_dev >= 0)
- bch2_dev_list_drop_dev(&m->op.devs_have, m->move_dev);
+ m->btree_id = btree_id;
+ m->data_cmd = data_cmd;
+ m->data_opts = data_opts;
+ m->nr_ptrs_reserved = 0;
- if (m->btree_insert_flags & BTREE_INSERT_USE_RESERVE)
+ 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;
+
+ /*
+ * op->csum_type is normally initialized from the fs/file's current
+ * options - but if an extent is encrypted, we require that it stays
+ * encrypted:
+ */
+ bkey_for_each_crc(k.k, ptrs, crc, entry)
+ if (bch2_csum_type_is_encryption(crc.csum_type)) {
+ m->op.nonce = crc.nonce + crc.offset;
+ m->op.csum_type = crc.csum_type;
+ break;
+ }
+
+ 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_ONLY_SPECIFIED_DEVS|
- BCH_WRITE_PAGES_STABLE|
+ m->op.flags |= BCH_WRITE_PAGES_STABLE|
BCH_WRITE_PAGES_OWNED|
BCH_WRITE_DATA_ENCODED|
- BCH_WRITE_NOMARK_REPLICAS;
+ BCH_WRITE_FROM_INTERNAL;
- m->op.wbio.bio.bi_iter.bi_size = m->op.crc.compressed_size << 9;
- m->op.nr_replicas = 1;
- m->op.nr_replicas_required = 1;
+ 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;
+
+ if (nr > 0) {
+ m->op.nr_replicas = m->nr_ptrs_reserved = nr;
+
+ 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) {
+ if (p.ptr.cached)
+ m->op.flags |= BCH_WRITE_CACHED;
+
+ if (!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();
+ }
+
+ return 0;
}
static void move_free(struct closure *cl)
{
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;
- int i;
- bio_for_each_segment_all(bv, &io->write.op.wbio.bio, i)
+ bch2_disk_reservation_put(io->write.op.c, &io->write.op.res);
+
+ bio_for_each_segment_all(bv, &io->write.op.wbio.bio, iter)
if (bv->bv_page)
__free_page(bv->bv_page);
- atomic_sub(io->sectors, &ctxt->sectors_in_flight);
wake_up(&ctxt->wait);
kfree(io);
}
+static void move_write_done(struct closure *cl)
+{
+ struct moving_io *io = container_of(cl, struct moving_io, cl);
+
+ atomic_sub(io->write_sectors, &io->write.ctxt->write_sectors);
+ closure_return_with_destructor(cl, move_free);
+}
+
static void move_write(struct closure *cl)
{
struct moving_io *io = container_of(cl, struct moving_io, cl);
- if (likely(!io->rbio.bio.bi_status)) {
- bch2_migrate_write_init(&io->write, &io->rbio);
- closure_call(&io->write.op.cl, bch2_write, NULL, cl);
+ if (unlikely(io->rbio.bio.bi_status || io->rbio.hole)) {
+ closure_return_with_destructor(cl, move_free);
+ return;
}
- closure_return_with_destructor(cl, move_free);
+ bch2_migrate_read_done(&io->write, &io->rbio);
+
+ 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);
}
static inline struct moving_io *next_pending_write(struct moving_context *ctxt)
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);
io->read_completed = true;
+
if (next_pending_write(ctxt))
wake_up(&ctxt->wait);
closure_put(&ctxt->cl);
}
-static int bch2_move_extent(struct bch_fs *c,
- struct moving_context *ctxt,
- struct bch_devs_mask *devs,
- struct write_point_specifier wp,
- int btree_insert_flags,
- int move_device,
- struct bch_io_opts opts,
- struct bkey_s_c k)
+static void do_pending_writes(struct moving_context *ctxt, struct btree_trans *trans)
{
- struct extent_pick_ptr pick;
struct moving_io *io;
- const struct bch_extent_ptr *ptr;
- struct bch_extent_crc_unpacked crc;
- unsigned sectors = k.k->size, pages;
- bch2_extent_pick_ptr(c, k, NULL, &pick);
- if (IS_ERR_OR_NULL(pick.ca))
- return pick.ca ? PTR_ERR(pick.ca) : 0;
+ if (trans)
+ bch2_trans_unlock(trans);
+
+ while ((io = next_pending_write(ctxt))) {
+ list_del(&io->list);
+ closure_call(&io->cl, move_write, NULL, &ctxt->cl);
+ }
+}
+
+#define move_ctxt_wait_event(_ctxt, _trans, _cond) \
+do { \
+ do_pending_writes(_ctxt, _trans); \
+ \
+ 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,
+ struct btree_trans *trans)
+{
+ unsigned sectors_pending = atomic_read(&ctxt->write_sectors);
+
+ move_ctxt_wait_event(ctxt, trans,
+ !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)
+{
+ 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;
/* write path might have to decompress data: */
- extent_for_each_ptr_crc(bkey_s_c_to_extent(k), ptr, crc)
- sectors = max_t(unsigned, sectors, crc.uncompressed_size);
+ 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) +
if (!io)
goto err;
- io->write.ctxt = ctxt;
- io->sectors = k.k->size;
+ 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_set_prio(&io->write.op.wbio.bio,
IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0));
- io->write.op.wbio.bio.bi_iter.bi_size = sectors << 9;
- bch2_bio_map(&io->write.op.wbio.bio, NULL);
- if (bio_alloc_pages(&io->write.op.wbio.bio, GFP_KERNEL)) {
- kfree(io);
- goto err;
- }
+ if (bch2_bio_alloc_pages(&io->write.op.wbio.bio, sectors << 9,
+ GFP_KERNEL))
+ goto err_free;
- io->rbio.opts = opts;
+ io->rbio.c = c;
+ io->rbio.opts = io_opts;
bio_init(&io->rbio.bio, io->bi_inline_vecs, pages);
+ 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_iter.bi_sector = bkey_start_offset(k.k);
io->rbio.bio.bi_end_io = move_read_endio;
- io->write.btree_insert_flags = btree_insert_flags;
- io->write.move_dev = move_device;
-
- bch2_write_op_init(&io->write.op, c);
- io->write.op.csum_type = bch2_data_checksum_type(c, opts.data_checksum);
- io->write.op.compression_type =
- bch2_compression_opt_to_type(opts.compression);
- io->write.op.devs = devs;
- io->write.op.write_point = wp;
+ ret = bch2_migrate_write_init(c, &io->write, wp, io_opts,
+ data_cmd, data_opts, btree_id, k);
+ if (ret)
+ goto err_free_pages;
atomic64_inc(&ctxt->stats->keys_moved);
atomic64_add(k.k->size, &ctxt->stats->sectors_moved);
trace_move_extent(k.k);
- atomic_add(io->sectors, &ctxt->sectors_in_flight);
+ atomic_add(io->read_sectors, &ctxt->read_sectors);
list_add_tail(&io->list, &ctxt->reads);
/*
* ctxt when doing wakeup
*/
closure_get(&ctxt->cl);
- bch2_read_extent(c, &io->rbio, bkey_s_c_to_extent(k),
- &pick, BCH_READ_NODECODE);
+ bch2_read_extent(trans, &io->rbio,
+ bkey_start_pos(k.k),
+ 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:
trace_move_alloc_fail(k.k);
- return -ENOMEM;
+ return ret;
}
-static void do_pending_writes(struct moving_context *ctxt)
+static int lookup_inode(struct btree_trans *trans, struct bpos pos,
+ struct bch_inode_unpacked *inode)
{
- struct moving_io *io;
+ struct btree_iter iter;
+ struct bkey_s_c k;
+ int ret;
- while ((io = next_pending_write(ctxt))) {
- list_del(&io->list);
- closure_call(&io->cl, move_write, NULL, &ctxt->cl);
- }
-}
+ bch2_trans_iter_init(trans, &iter, BTREE_ID_inodes, pos,
+ BTREE_ITER_ALL_SNAPSHOTS);
+ k = bch2_btree_iter_peek(&iter);
+ ret = bkey_err(k);
+ if (ret)
+ goto err;
-#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)
+ if (!k.k || bkey_cmp(k.k->p, pos)) {
+ ret = -ENOENT;
+ goto err;
+ }
-static void bch2_move_ctxt_wait_for_io(struct moving_context *ctxt)
-{
- unsigned sectors_pending = atomic_read(&ctxt->sectors_in_flight);
+ ret = bkey_is_inode(k.k) ? 0 : -EIO;
+ if (ret)
+ goto err;
- move_ctxt_wait_event(ctxt,
- !atomic_read(&ctxt->sectors_in_flight) ||
- atomic_read(&ctxt->sectors_in_flight) != sectors_pending);
+ ret = bch2_inode_unpack(k, inode);
+ if (ret)
+ goto err;
+err:
+ bch2_trans_iter_exit(trans, &iter);
+ return ret;
}
-int bch2_move_data(struct bch_fs *c,
- struct bch_ratelimit *rate,
- unsigned sectors_in_flight,
- struct bch_devs_mask *devs,
- struct write_point_specifier wp,
- int btree_insert_flags,
- int move_device,
- move_pred_fn pred, void *arg,
- struct bch_move_stats *stats)
+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)
{
bool kthread = (current->flags & PF_KTHREAD) != 0;
- struct moving_context ctxt = { .stats = stats };
- struct bch_io_opts opts = bch2_opts_to_inode_opts(c->opts);
- BKEY_PADDED(k) tmp;
+ 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 bkey_s_c k;
- u64 cur_inum = U64_MAX;
- int ret = 0;
+ struct data_opts data_opts;
+ enum data_cmd data_cmd;
+ u64 delay, cur_inum = U64_MAX;
+ int ret = 0, ret2;
- memset(stats, 0, sizeof(*stats));
- closure_init_stack(&ctxt.cl);
- INIT_LIST_HEAD(&ctxt.reads);
- init_waitqueue_head(&ctxt.wait);
- bch2_btree_iter_init(&stats->iter, c, BTREE_ID_EXTENTS, POS_MIN,
- BTREE_ITER_PREFETCH);
+ bch2_bkey_buf_init(&sk);
+ bch2_trans_init(&trans, c, 0, 0);
+
+ stats->data_type = BCH_DATA_user;
+ stats->btree_id = btree_id;
+ stats->pos = start;
+
+ bch2_trans_iter_init(&trans, &iter, btree_id, start,
+ BTREE_ITER_PREFETCH|
+ BTREE_ITER_ALL_SNAPSHOTS);
if (rate)
bch2_ratelimit_reset(rate);
- while (!kthread || !(ret = kthread_should_stop())) {
- if (atomic_read(&ctxt.sectors_in_flight) >= sectors_in_flight) {
- bch2_btree_iter_unlock(&stats->iter);
- move_ctxt_wait_event(&ctxt,
- atomic_read(&ctxt.sectors_in_flight) <
- sectors_in_flight);
- }
+ while (1) {
+ do {
+ delay = rate ? bch2_ratelimit_delay(rate) : 0;
- if (rate &&
- bch2_ratelimit_delay(rate) &&
- (bch2_btree_iter_unlock(&stats->iter),
- (ret = bch2_ratelimit_wait_freezable_stoppable(rate))))
- break;
-peek:
- k = bch2_btree_iter_peek(&stats->iter);
+ if (delay) {
+ bch2_trans_unlock(&trans);
+ set_current_state(TASK_INTERRUPTIBLE);
+ }
+
+ if (kthread && (ret = kthread_should_stop())) {
+ __set_current_state(TASK_RUNNING);
+ goto out;
+ }
+
+ if (delay)
+ schedule_timeout(delay);
+
+ if (unlikely(freezing(current))) {
+ move_ctxt_wait_event(ctxt, &trans, list_empty(&ctxt->reads));
+ try_to_freeze();
+ }
+ } while (delay);
+
+ move_ctxt_wait_event(ctxt, &trans,
+ atomic_read(&ctxt->write_sectors) <
+ SECTORS_IN_FLIGHT_PER_DEVICE);
+
+ move_ctxt_wait_event(ctxt, &trans,
+ atomic_read(&ctxt->read_sectors) <
+ SECTORS_IN_FLIGHT_PER_DEVICE);
+
+ bch2_trans_begin(&trans);
+
+ k = bch2_btree_iter_peek(&iter);
if (!k.k)
break;
- ret = btree_iter_err(k);
+
+ ret = bkey_err(k);
+ if (ret == -EINTR)
+ continue;
if (ret)
break;
- if (!bkey_extent_is_data(k.k))
+ if (bkey_cmp(bkey_start_pos(k.k), end) >= 0)
+ break;
+
+ stats->pos = iter.pos;
+
+ if (!bkey_extent_is_direct_data(k.k))
goto next_nondata;
- if (cur_inum != k.k->p.inode) {
+ 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_btree_iter_unlock(&stats->iter);
+ io_opts = bch2_opts_to_inode_opts(c->opts);
+
+ ret = lookup_inode(&trans,
+ SPOS(0, k.k->p.inode, k.k->p.snapshot),
+ &inode);
+ if (ret == -EINTR)
+ continue;
+
+ if (!ret)
+ bch2_io_opts_apply(&io_opts, bch2_inode_opts_get(&inode));
- opts = bch2_opts_to_inode_opts(c->opts);
- if (!bch2_inode_find_by_inum(c, k.k->p.inode, &inode))
- bch2_io_opts_apply(&opts, bch2_inode_opts_get(&inode));
cur_inum = k.k->p.inode;
- goto peek;
}
- if (!pred(arg, bkey_s_c_to_extent(k)))
+ switch ((data_cmd = pred(c, arg, k, &io_opts, &data_opts))) {
+ case DATA_SKIP:
goto next;
+ case DATA_SCRUB:
+ BUG();
+ case DATA_ADD_REPLICAS:
+ case DATA_REWRITE:
+ case DATA_PROMOTE:
+ break;
+ default:
+ BUG();
+ }
- /* unlock before doing IO: */
- bkey_reassemble(&tmp.k, k);
- k = bkey_i_to_s_c(&tmp.k);
- bch2_btree_iter_unlock(&stats->iter);
+ /*
+ * 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(&trans, ctxt, wp, io_opts, btree_id, k,
+ data_cmd, data_opts);
+ if (ret2) {
+ if (ret2 == -EINTR)
+ continue;
- if (bch2_move_extent(c, &ctxt, devs, wp,
- btree_insert_flags,
- move_device, opts, k)) {
- /* memory allocation failure, wait for some IO to finish */
- bch2_move_ctxt_wait_for_io(&ctxt);
- continue;
+ if (ret2 == -ENOMEM) {
+ /* memory allocation failure, wait for some IO to finish */
+ bch2_move_ctxt_wait_for_io(ctxt, &trans);
+ continue;
+ }
+
+ /* XXX signal failure */
+ goto next;
}
if (rate)
bch2_ratelimit_increment(rate, k.k->size);
next:
- atomic64_add(k.k->size * bch2_extent_nr_dirty_ptrs(k),
- &stats->sectors_seen);
+ atomic64_add(k.k->size, &stats->sectors_seen);
next_nondata:
- bch2_btree_iter_next(&stats->iter);
- bch2_btree_iter_cond_resched(&stats->iter);
+ bch2_btree_iter_advance(&iter);
}
+out:
+
+ bch2_trans_iter_exit(&trans, &iter);
+ bch2_trans_exit(&trans);
+ bch2_bkey_buf_exit(&sk, c);
+
+ return ret;
+}
+
+inline void bch_move_stats_init(struct bch_move_stats *stats, char *name)
+{
+ memset(stats, 0, sizeof(*stats));
- bch2_btree_iter_unlock(&stats->iter);
+ scnprintf(stats->name, sizeof(stats->name),
+ "%s", name);
+}
- move_ctxt_wait_event(&ctxt, !atomic_read(&ctxt.sectors_in_flight));
+static inline void progress_list_add(struct bch_fs *c,
+ struct bch_move_stats *stats)
+{
+ mutex_lock(&c->data_progress_lock);
+ list_add(&stats->list, &c->data_progress_list);
+ mutex_unlock(&c->data_progress_lock);
+}
+
+static inline void progress_list_del(struct bch_fs *c,
+ struct bch_move_stats *stats)
+{
+ mutex_lock(&c->data_progress_lock);
+ list_del(&stats->list);
+ mutex_unlock(&c->data_progress_lock);
+}
+
+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 bch_ratelimit *rate,
+ struct write_point_specifier wp,
+ move_pred_fn pred, void *arg,
+ struct bch_move_stats *stats)
+{
+ struct moving_context ctxt = { .stats = stats };
+ enum btree_id id;
+ int ret;
+
+ progress_list_add(c, stats);
+ closure_init_stack(&ctxt.cl);
+ INIT_LIST_HEAD(&ctxt.reads);
+ init_waitqueue_head(&ctxt.wait);
+
+ stats->data_type = BCH_DATA_user;
+
+ for (id = start_btree_id;
+ id <= min_t(unsigned, end_btree_id, BTREE_ID_NR - 1);
+ id++) {
+ stats->btree_id = id;
+
+ if (id != BTREE_ID_extents &&
+ id != BTREE_ID_reflink)
+ continue;
+
+ ret = __bch2_move_data(c, &ctxt, rate, wp,
+ id == start_btree_id ? start_pos : POS_MIN,
+ id == end_btree_id ? end_pos : POS_MAX,
+ pred, arg, stats, id);
+ if (ret)
+ break;
+ }
+
+
+ move_ctxt_wait_event(&ctxt, NULL, list_empty(&ctxt.reads));
closure_sync(&ctxt.cl);
- EBUG_ON(!list_empty(&ctxt.reads));
- EBUG_ON(atomic_read(&ctxt.sectors_in_flight));
+ EBUG_ON(atomic_read(&ctxt.write_sectors));
trace_move_data(c,
atomic64_read(&stats->sectors_moved),
atomic64_read(&stats->keys_moved));
+ progress_list_del(c, stats);
+ return ret;
+}
+
+typedef enum data_cmd (*move_btree_pred)(struct bch_fs *, void *,
+ struct btree *, struct bch_io_opts *,
+ struct data_opts *);
+
+static int bch2_move_btree(struct bch_fs *c,
+ enum btree_id start_btree_id, struct bpos start_pos,
+ enum btree_id end_btree_id, struct bpos end_pos,
+ 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 btree *b;
+ enum btree_id id;
+ struct data_opts data_opts;
+ enum data_cmd cmd;
+ int ret = 0;
+
+ bch2_trans_init(&trans, c, 0, 0);
+ progress_list_add(c, stats);
+
+ stats->data_type = BCH_DATA_btree;
+
+ for (id = start_btree_id;
+ id <= min_t(unsigned, end_btree_id, BTREE_ID_NR - 1);
+ id++) {
+ stats->btree_id = id;
+
+ bch2_trans_node_iter_init(&trans, &iter, id, 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(id, end_btree_id) ?:
+ bpos_cmp(b->key.k.p, end_pos)) > 0)
+ break;
+
+ stats->pos = iter.pos;
+
+ switch ((cmd = pred(c, arg, b, &io_opts, &data_opts))) {
+ case DATA_SKIP:
+ goto next;
+ case DATA_SCRUB:
+ BUG();
+ case DATA_ADD_REPLICAS:
+ case DATA_REWRITE:
+ break;
+ default:
+ BUG();
+ }
+
+ ret = bch2_btree_node_rewrite(&trans, &iter, b, 0) ?: ret;
+ if (ret == -EINTR)
+ continue;
+ if (ret)
+ break;
+next:
+ bch2_btree_iter_next_node(&iter);
+ }
+ if (ret == -EINTR)
+ goto retry;
+
+ bch2_trans_iter_exit(&trans, &iter);
+
+ if (kthread && kthread_should_stop())
+ break;
+ }
+
+ bch2_trans_exit(&trans);
+
+ if (ret)
+ bch_err(c, "error %i in bch2_move_btree", ret);
+
+ /* flush relevant btree updates */
+ closure_wait_event(&c->btree_interior_update_wait,
+ !bch2_btree_interior_updates_nr_pending(c));
+
+ progress_list_del(c, stats);
+ 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)
+{
+ 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 DATA_SKIP;
+
+ data_opts->target = 0;
+ data_opts->nr_replicas = 1;
+ data_opts->btree_insert_flags = 0;
+ return DATA_ADD_REPLICAS;
+}
+
+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)
+{
+ struct bch_ioctl_data *op = arg;
+
+ if (!bch2_bkey_has_device(k, op->migrate.dev))
+ return DATA_SKIP;
+
+ data_opts->target = 0;
+ data_opts->nr_replicas = 1;
+ data_opts->btree_insert_flags = 0;
+ data_opts->rewrite_dev = op->migrate.dev;
+ return DATA_REWRITE;
+}
+
+static enum data_cmd rereplicate_btree_pred(struct bch_fs *c, void *arg,
+ struct btree *b,
+ struct bch_io_opts *io_opts,
+ struct data_opts *data_opts)
+{
+ return rereplicate_pred(c, arg, bkey_i_to_s_c(&b->key), io_opts, data_opts);
+}
+
+static enum data_cmd migrate_btree_pred(struct bch_fs *c, void *arg,
+ struct btree *b,
+ struct bch_io_opts *io_opts,
+ struct data_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 enum data_cmd rewrite_old_nodes_pred(struct bch_fs *c, void *arg,
+ struct btree *b,
+ struct bch_io_opts *io_opts,
+ struct data_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->nr_replicas = 1;
+ data_opts->btree_insert_flags = 0;
+ return DATA_REWRITE;
+ }
+
+ return DATA_SKIP;
+}
+
+int bch2_scan_old_btree_nodes(struct bch_fs *c, struct bch_move_stats *stats)
+{
+ int ret;
+
+ ret = bch2_move_btree(c,
+ 0, POS_MIN,
+ BTREE_ID_NR, SPOS_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);
+ }
+
+ return ret;
+}
+
+int bch2_data_job(struct bch_fs *c,
+ struct bch_move_stats *stats,
+ struct bch_ioctl_data op)
+{
+ int ret = 0;
+
+ switch (op.op) {
+ case BCH_DATA_OP_REREPLICATE:
+ bch_move_stats_init(stats, "rereplicate");
+ stats->data_type = BCH_DATA_journal;
+ ret = bch2_journal_flush_device_pins(&c->journal, -1);
+
+ ret = bch2_move_btree(c,
+ op.start_btree, op.start_pos,
+ op.end_btree, op.end_pos,
+ rereplicate_btree_pred, c, stats) ?: ret;
+ ret = bch2_replicas_gc2(c) ?: ret;
+
+ ret = bch2_move_data(c,
+ op.start_btree, op.start_pos,
+ op.end_btree, op.end_pos,
+ NULL, writepoint_hashed((unsigned long) current),
+ rereplicate_pred, c, stats) ?: ret;
+ ret = bch2_replicas_gc2(c) ?: ret;
+ break;
+ case BCH_DATA_OP_MIGRATE:
+ if (op.migrate.dev >= c->sb.nr_devices)
+ return -EINVAL;
+
+ bch_move_stats_init(stats, "migrate");
+ stats->data_type = BCH_DATA_journal;
+ ret = bch2_journal_flush_device_pins(&c->journal, op.migrate.dev);
+
+ ret = bch2_move_btree(c,
+ op.start_btree, op.start_pos,
+ op.end_btree, op.end_pos,
+ migrate_btree_pred, &op, stats) ?: ret;
+ ret = bch2_replicas_gc2(c) ?: ret;
+
+ ret = bch2_move_data(c,
+ op.start_btree, op.start_pos,
+ op.end_btree, op.end_pos,
+ NULL, writepoint_hashed((unsigned long) current),
+ migrate_pred, &op, stats) ?: ret;
+ ret = bch2_replicas_gc2(c) ?: ret;
+ break;
+ case BCH_DATA_OP_REWRITE_OLD_NODES:
+ bch_move_stats_init(stats, "rewrite_old_nodes");
+ ret = bch2_scan_old_btree_nodes(c, stats);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
return ret;
}
projects / bcachefs-tools-debian / blobdiff