diff options
Diffstat (limited to 'fs/bcachefs/data_update.c')
-rw-r--r-- | fs/bcachefs/data_update.c | 83 |
1 files changed, 58 insertions, 25 deletions
diff --git a/fs/bcachefs/data_update.c b/fs/bcachefs/data_update.c index 4150feca42a2..0d807c2ce9c6 100644 --- a/fs/bcachefs/data_update.c +++ b/fs/bcachefs/data_update.c @@ -14,6 +14,7 @@ #include "move.h" #include "nocow_locking.h" #include "rebalance.h" +#include "snapshot.h" #include "subvolume.h" #include "trace.h" @@ -105,7 +106,7 @@ static int __bch2_data_update_index_update(struct btree_trans *trans, bch2_trans_iter_init(trans, &iter, m->btree_id, bkey_start_pos(&bch2_keylist_front(keys)->k), - BTREE_ITER_SLOTS|BTREE_ITER_INTENT); + BTREE_ITER_slots|BTREE_ITER_intent); while (1) { struct bkey_s_c k; @@ -202,6 +203,8 @@ restart_drop_conflicting_replicas: /* Now, drop excess replicas: */ restart_drop_extra_replicas: + + rcu_read_lock(); bkey_for_each_ptr_decode(old.k, bch2_bkey_ptrs(bkey_i_to_s(insert)), p, entry) { unsigned ptr_durability = bch2_extent_ptr_durability(c, &p); @@ -213,6 +216,7 @@ restart_drop_extra_replicas: goto restart_drop_extra_replicas; } } + rcu_read_unlock(); /* Finally, add the pointers we just wrote: */ extent_for_each_ptr_decode(extent_i_to_s(new), p, entry) @@ -287,7 +291,7 @@ restart_drop_extra_replicas: k.k->p, insert->k.p) ?: bch2_bkey_set_needs_rebalance(c, insert, &op->opts) ?: bch2_trans_update(trans, &iter, insert, - BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) ?: + BTREE_UPDATE_internal_snapshot_node) ?: bch2_trans_commit(trans, &op->res, NULL, BCH_TRANS_COMMIT_no_check_rw| @@ -356,10 +360,11 @@ void bch2_data_update_exit(struct data_update *update) bch2_bkey_ptrs_c(bkey_i_to_s_c(update->k.k)); bkey_for_each_ptr(ptrs, ptr) { + struct bch_dev *ca = bch2_dev_have_ref(c, ptr->dev); if (c->opts.nocow_enabled) bch2_bucket_nocow_unlock(&c->nocow_locks, - PTR_BUCKET_POS(c, ptr), 0); - percpu_ref_put(&bch_dev_bkey_exists(c, ptr->dev)->ref); + PTR_BUCKET_POS(ca, ptr), 0); + bch2_dev_put(ca); } bch2_bkey_buf_exit(&update->k, c); @@ -385,8 +390,10 @@ static void bch2_update_unwritten_extent(struct btree_trans *trans, while (bio_sectors(bio)) { unsigned sectors = bio_sectors(bio); + bch2_trans_begin(trans); + bch2_trans_iter_init(trans, &iter, update->btree_id, update->op.pos, - BTREE_ITER_SLOTS); + BTREE_ITER_slots); ret = lockrestart_do(trans, ({ k = bch2_btree_iter_peek_slot(&iter); bkey_err(k); @@ -464,7 +471,6 @@ int bch2_extent_drop_ptrs(struct btree_trans *trans, while (data_opts.kill_ptrs) { unsigned i = 0, drop = __fls(data_opts.kill_ptrs); - struct bch_extent_ptr *ptr; bch2_bkey_drop_ptrs(bkey_i_to_s(n), ptr, i++ == drop); data_opts.kill_ptrs ^= 1U << drop; @@ -479,15 +485,15 @@ int bch2_extent_drop_ptrs(struct btree_trans *trans, /* * Since we're not inserting through an extent iterator - * (BTREE_ITER_ALL_SNAPSHOTS iterators aren't extent iterators), + * (BTREE_ITER_all_snapshots iterators aren't extent iterators), * we aren't using the extent overwrite path to delete, we're * just using the normal key deletion path: */ - if (bkey_deleted(&n->k) && !(iter->flags & BTREE_ITER_IS_EXTENTS)) + if (bkey_deleted(&n->k) && !(iter->flags & BTREE_ITER_is_extents)) n->k.size = 0; return bch2_trans_relock(trans) ?: - bch2_trans_update(trans, iter, n, BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE) ?: + bch2_trans_update(trans, iter, n, BTREE_UPDATE_internal_snapshot_node) ?: bch2_trans_commit(trans, NULL, NULL, BCH_TRANS_COMMIT_no_enospc); } @@ -509,6 +515,14 @@ int bch2_data_update_init(struct btree_trans *trans, unsigned ptrs_locked = 0; int ret = 0; + /* + * fs is corrupt we have a key for a snapshot node that doesn't exist, + * and we have to check for this because we go rw before repairing the + * snapshots table - just skip it, we can move it later. + */ + if (unlikely(k.k->p.snapshot && !bch2_snapshot_equiv(c, k.k->p.snapshot))) + return -BCH_ERR_data_update_done; + bch2_bkey_buf_init(&m->k); bch2_bkey_buf_reassemble(&m->k, c, k); m->btree_id = btree_id; @@ -530,15 +544,26 @@ int bch2_data_update_init(struct btree_trans *trans, m->op.compression_opt = background_compression(io_opts); m->op.watermark = m->data_opts.btree_insert_flags & BCH_WATERMARK_MASK; - bkey_for_each_ptr(ptrs, ptr) - percpu_ref_get(&bch_dev_bkey_exists(c, ptr->dev)->ref); + bkey_for_each_ptr(ptrs, ptr) { + if (!bch2_dev_tryget(c, ptr->dev)) { + bkey_for_each_ptr(ptrs, ptr2) { + if (ptr2 == ptr) + break; + bch2_dev_put(bch2_dev_have_ref(c, ptr2->dev)); + } + return -BCH_ERR_data_update_done; + } + } unsigned durability_have = 0, durability_removing = 0; i = 0; bkey_for_each_ptr_decode(k.k, ptrs, p, entry) { + struct bch_dev *ca = bch2_dev_have_ref(c, p.ptr.dev); + struct bpos bucket = PTR_BUCKET_POS(ca, &p.ptr); bool locked; + rcu_read_lock(); if (((1U << i) & m->data_opts.rewrite_ptrs)) { BUG_ON(p.ptr.cached); @@ -552,6 +577,7 @@ int bch2_data_update_init(struct btree_trans *trans, bch2_dev_list_add_dev(&m->op.devs_have, p.ptr.dev); durability_have += bch2_extent_ptr_durability(c, &p); } + rcu_read_unlock(); /* * op->csum_type is normally initialized from the fs/file's @@ -570,16 +596,13 @@ int bch2_data_update_init(struct btree_trans *trans, if (ctxt) { move_ctxt_wait_event(ctxt, (locked = bch2_bucket_nocow_trylock(&c->nocow_locks, - PTR_BUCKET_POS(c, &p.ptr), 0)) || - (!atomic_read(&ctxt->read_sectors) && - !atomic_read(&ctxt->write_sectors))); + bucket, 0)) || + list_empty(&ctxt->ios)); if (!locked) - bch2_bucket_nocow_lock(&c->nocow_locks, - PTR_BUCKET_POS(c, &p.ptr), 0); + bch2_bucket_nocow_lock(&c->nocow_locks, bucket, 0); } else { - if (!bch2_bucket_nocow_trylock(&c->nocow_locks, - PTR_BUCKET_POS(c, &p.ptr), 0)) { + if (!bch2_bucket_nocow_trylock(&c->nocow_locks, bucket, 0)) { ret = -BCH_ERR_nocow_lock_blocked; goto err; } @@ -590,6 +613,8 @@ int bch2_data_update_init(struct btree_trans *trans, i++; } + unsigned durability_required = max(0, (int) (io_opts.data_replicas - durability_have)); + /* * If current extent durability is less than io_opts.data_replicas, * we're not trying to rereplicate the extent up to data_replicas here - @@ -599,7 +624,7 @@ int bch2_data_update_init(struct btree_trans *trans, * rereplicate, currently, so that users don't get an unexpected -ENOSPC */ if (!(m->data_opts.write_flags & BCH_WRITE_CACHED) && - durability_have >= io_opts.data_replicas) { + !durability_required) { m->data_opts.kill_ptrs |= m->data_opts.rewrite_ptrs; m->data_opts.rewrite_ptrs = 0; /* if iter == NULL, it's just a promote */ @@ -608,11 +633,18 @@ int bch2_data_update_init(struct btree_trans *trans, goto done; } - m->op.nr_replicas = min(durability_removing, io_opts.data_replicas - durability_have) + + m->op.nr_replicas = min(durability_removing, durability_required) + m->data_opts.extra_replicas; - m->op.nr_replicas_required = m->op.nr_replicas; - BUG_ON(!m->op.nr_replicas); + /* + * If device(s) were set to durability=0 after data was written to them + * we can end up with a duribilty=0 extent, and the normal algorithm + * that tries not to increase durability doesn't work: + */ + if (!(durability_have + durability_removing)) + m->op.nr_replicas = max((unsigned) m->op.nr_replicas, 1); + + m->op.nr_replicas_required = m->op.nr_replicas; if (reserve_sectors) { ret = bch2_disk_reservation_add(c, &m->op.res, reserve_sectors, @@ -632,10 +664,11 @@ int bch2_data_update_init(struct btree_trans *trans, err: i = 0; bkey_for_each_ptr_decode(k.k, ptrs, p, entry) { + struct bch_dev *ca = bch2_dev_have_ref(c, p.ptr.dev); + struct bpos bucket = PTR_BUCKET_POS(ca, &p.ptr); if ((1U << i) & ptrs_locked) - bch2_bucket_nocow_unlock(&c->nocow_locks, - PTR_BUCKET_POS(c, &p.ptr), 0); - percpu_ref_put(&bch_dev_bkey_exists(c, p.ptr.dev)->ref); + bch2_bucket_nocow_unlock(&c->nocow_locks, bucket, 0); + bch2_dev_put(ca); i++; } |