+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-
-#include "bcachefs.h"
-#include "btree_update.h"
-#include "btree_iter.h"
-#include "btree_journal_iter.h"
-#include "btree_locking.h"
-#include "buckets.h"
-#include "debug.h"
-#include "errcode.h"
-#include "error.h"
-#include "extents.h"
-#include "keylist.h"
-#include "snapshot.h"
-#include "trace.h"
-
-static inline int btree_insert_entry_cmp(const struct btree_insert_entry *l,
- const struct btree_insert_entry *r)
-{
- return cmp_int(l->btree_id, r->btree_id) ?:
- cmp_int(l->cached, r->cached) ?:
- -cmp_int(l->level, r->level) ?:
- bpos_cmp(l->k->k.p, r->k->k.p);
-}
-
-static int __must_check
-bch2_trans_update_by_path(struct btree_trans *, btree_path_idx_t,
- struct bkey_i *, enum btree_update_flags,
- unsigned long ip);
-
-static noinline int extent_front_merge(struct btree_trans *trans,
- struct btree_iter *iter,
- struct bkey_s_c k,
- struct bkey_i **insert,
- enum btree_update_flags flags)
-{
- struct bch_fs *c = trans->c;
- struct bkey_i *update;
- int ret;
-
- update = bch2_bkey_make_mut_noupdate(trans, k);
- ret = PTR_ERR_OR_ZERO(update);
- if (ret)
- return ret;
-
- if (!bch2_bkey_merge(c, bkey_i_to_s(update), bkey_i_to_s_c(*insert)))
- return 0;
-
- ret = bch2_key_has_snapshot_overwrites(trans, iter->btree_id, k.k->p) ?:
- bch2_key_has_snapshot_overwrites(trans, iter->btree_id, (*insert)->k.p);
- if (ret < 0)
- return ret;
- if (ret)
- return 0;
-
- ret = bch2_btree_delete_at(trans, iter, flags);
- if (ret)
- return ret;
-
- *insert = update;
- return 0;
-}
-
-static noinline int extent_back_merge(struct btree_trans *trans,
- struct btree_iter *iter,
- struct bkey_i *insert,
- struct bkey_s_c k)
-{
- struct bch_fs *c = trans->c;
- int ret;
-
- ret = bch2_key_has_snapshot_overwrites(trans, iter->btree_id, insert->k.p) ?:
- bch2_key_has_snapshot_overwrites(trans, iter->btree_id, k.k->p);
- if (ret < 0)
- return ret;
- if (ret)
- return 0;
-
- bch2_bkey_merge(c, bkey_i_to_s(insert), k);
- return 0;
-}
-
-/*
- * When deleting, check if we need to emit a whiteout (because we're overwriting
- * something in an ancestor snapshot)
- */
-static int need_whiteout_for_snapshot(struct btree_trans *trans,
- enum btree_id btree_id, struct bpos pos)
-{
- struct btree_iter iter;
- struct bkey_s_c k;
- u32 snapshot = pos.snapshot;
- int ret;
-
- if (!bch2_snapshot_parent(trans->c, pos.snapshot))
- return 0;
-
- pos.snapshot++;
-
- for_each_btree_key_norestart(trans, iter, btree_id, pos,
- BTREE_ITER_ALL_SNAPSHOTS|
- BTREE_ITER_NOPRESERVE, k, ret) {
- if (!bkey_eq(k.k->p, pos))
- break;
-
- if (bch2_snapshot_is_ancestor(trans->c, snapshot,
- k.k->p.snapshot)) {
- ret = !bkey_whiteout(k.k);
- break;
- }
- }
- bch2_trans_iter_exit(trans, &iter);
-
- return ret;
-}
-
-int __bch2_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 old_iter, new_iter = { NULL };
- struct bkey_s_c old_k, new_k;
- snapshot_id_list s;
- struct bkey_i *update;
- int ret = 0;
-
- if (!bch2_snapshot_has_children(c, old_pos.snapshot))
- return 0;
-
- darray_init(&s);
-
- bch2_trans_iter_init(trans, &old_iter, id, old_pos,
- BTREE_ITER_NOT_EXTENTS|
- BTREE_ITER_ALL_SNAPSHOTS);
- while ((old_k = bch2_btree_iter_prev(&old_iter)).k &&
- !(ret = bkey_err(old_k)) &&
- bkey_eq(old_pos, old_k.k->p)) {
- struct bpos whiteout_pos =
- SPOS(new_pos.inode, new_pos.offset, old_k.k->p.snapshot);;
-
- if (!bch2_snapshot_is_ancestor(c, old_k.k->p.snapshot, old_pos.snapshot) ||
- snapshot_list_has_ancestor(c, &s, old_k.k->p.snapshot))
- continue;
-
- new_k = bch2_bkey_get_iter(trans, &new_iter, id, whiteout_pos,
- BTREE_ITER_NOT_EXTENTS|
- BTREE_ITER_INTENT);
- ret = bkey_err(new_k);
- if (ret)
- break;
-
- if (new_k.k->type == KEY_TYPE_deleted) {
- 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 = whiteout_pos;
- update->k.type = KEY_TYPE_whiteout;
-
- ret = bch2_trans_update(trans, &new_iter, update,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE);
- }
- bch2_trans_iter_exit(trans, &new_iter);
-
- ret = snapshot_list_add(c, &s, old_k.k->p.snapshot);
- if (ret)
- break;
- }
- bch2_trans_iter_exit(trans, &new_iter);
- bch2_trans_iter_exit(trans, &old_iter);
- darray_exit(&s);
-
- return ret;
-}
-
-int bch2_trans_update_extent_overwrite(struct btree_trans *trans,
- struct btree_iter *iter,
- enum btree_update_flags flags,
- struct bkey_s_c old,
- struct bkey_s_c new)
-{
- enum btree_id btree_id = iter->btree_id;
- struct bkey_i *update;
- struct bpos new_start = bkey_start_pos(new.k);
- unsigned front_split = bkey_lt(bkey_start_pos(old.k), new_start);
- unsigned back_split = bkey_gt(old.k->p, new.k->p);
- unsigned middle_split = (front_split || back_split) &&
- old.k->p.snapshot != new.k->p.snapshot;
- unsigned nr_splits = front_split + back_split + middle_split;
- int ret = 0, compressed_sectors;
-
- /*
- * If we're going to be splitting a compressed extent, note it
- * so that __bch2_trans_commit() can increase our disk
- * reservation:
- */
- if (nr_splits > 1 &&
- (compressed_sectors = bch2_bkey_sectors_compressed(old)))
- trans->extra_disk_res += compressed_sectors * (nr_splits - 1);
-
- if (front_split) {
- update = bch2_bkey_make_mut_noupdate(trans, old);
- if ((ret = PTR_ERR_OR_ZERO(update)))
- return ret;
-
- bch2_cut_back(new_start, update);
-
- ret = bch2_insert_snapshot_whiteouts(trans, btree_id,
- old.k->p, update->k.p) ?:
- bch2_btree_insert_nonextent(trans, btree_id, update,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|flags);
- if (ret)
- return ret;
- }
-
- /* If we're overwriting in a different snapshot - middle split: */
- if (middle_split) {
- update = bch2_bkey_make_mut_noupdate(trans, old);
- if ((ret = PTR_ERR_OR_ZERO(update)))
- return ret;
-
- bch2_cut_front(new_start, update);
- bch2_cut_back(new.k->p, update);
-
- ret = bch2_insert_snapshot_whiteouts(trans, btree_id,
- old.k->p, update->k.p) ?:
- bch2_btree_insert_nonextent(trans, btree_id, update,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|flags);
- if (ret)
- return ret;
- }
-
- if (bkey_le(old.k->p, new.k->p)) {
- update = bch2_trans_kmalloc(trans, sizeof(*update));
- if ((ret = PTR_ERR_OR_ZERO(update)))
- return ret;
-
- bkey_init(&update->k);
- update->k.p = old.k->p;
- update->k.p.snapshot = new.k->p.snapshot;
-
- if (new.k->p.snapshot != old.k->p.snapshot) {
- update->k.type = KEY_TYPE_whiteout;
- } else if (btree_type_has_snapshots(btree_id)) {
- ret = need_whiteout_for_snapshot(trans, btree_id, update->k.p);
- if (ret < 0)
- return ret;
- if (ret)
- update->k.type = KEY_TYPE_whiteout;
- }
-
- ret = bch2_btree_insert_nonextent(trans, btree_id, update,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|flags);
- if (ret)
- return ret;
- }
-
- if (back_split) {
- update = bch2_bkey_make_mut_noupdate(trans, old);
- if ((ret = PTR_ERR_OR_ZERO(update)))
- return ret;
-
- bch2_cut_front(new.k->p, update);
-
- ret = bch2_trans_update_by_path(trans, iter->path, update,
- BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE|
- flags, _RET_IP_);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static int bch2_trans_update_extent(struct btree_trans *trans,
- struct btree_iter *orig_iter,
- struct bkey_i *insert,
- enum btree_update_flags flags)
-{
- struct btree_iter iter;
- struct bkey_s_c k;
- enum btree_id btree_id = orig_iter->btree_id;
- int ret = 0;
-
- bch2_trans_iter_init(trans, &iter, btree_id, bkey_start_pos(&insert->k),
- BTREE_ITER_INTENT|
- BTREE_ITER_WITH_UPDATES|
- BTREE_ITER_NOT_EXTENTS);
- k = bch2_btree_iter_peek_upto(&iter, POS(insert->k.p.inode, U64_MAX));
- if ((ret = bkey_err(k)))
- goto err;
- if (!k.k)
- goto out;
-
- if (bkey_eq(k.k->p, bkey_start_pos(&insert->k))) {
- if (bch2_bkey_maybe_mergable(k.k, &insert->k)) {
- ret = extent_front_merge(trans, &iter, k, &insert, flags);
- if (ret)
- goto err;
- }
-
- goto next;
- }
-
- while (bkey_gt(insert->k.p, bkey_start_pos(k.k))) {
- bool done = bkey_lt(insert->k.p, k.k->p);
-
- ret = bch2_trans_update_extent_overwrite(trans, &iter, flags, k, bkey_i_to_s_c(insert));
- if (ret)
- goto err;
-
- if (done)
- goto out;
-next:
- bch2_btree_iter_advance(&iter);
- k = bch2_btree_iter_peek_upto(&iter, POS(insert->k.p.inode, U64_MAX));
- if ((ret = bkey_err(k)))
- goto err;
- if (!k.k)
- goto out;
- }
-
- if (bch2_bkey_maybe_mergable(&insert->k, k.k)) {
- ret = extent_back_merge(trans, &iter, insert, k);
- if (ret)
- goto err;
- }
-out:
- if (!bkey_deleted(&insert->k))
- ret = bch2_btree_insert_nonextent(trans, btree_id, insert, flags);
-err:
- bch2_trans_iter_exit(trans, &iter);
-
- return ret;
-}
-
-static noinline int flush_new_cached_update(struct btree_trans *trans,
- struct btree_insert_entry *i,
- enum btree_update_flags flags,
- unsigned long ip)
-{
- struct bkey k;
- int ret;
-
- btree_path_idx_t path_idx =
- bch2_path_get(trans, i->btree_id, i->old_k.p, 1, 0,
- BTREE_ITER_INTENT, _THIS_IP_);
- ret = bch2_btree_path_traverse(trans, path_idx, 0);
- if (ret)
- goto out;
-
- struct btree_path *btree_path = trans->paths + path_idx;
-
- /*
- * The old key in the insert entry might actually refer to an existing
- * key in the btree that has been deleted from cache and not yet
- * flushed. Check for this and skip the flush so we don't run triggers
- * against a stale key.
- */
- bch2_btree_path_peek_slot_exact(btree_path, &k);
- if (!bkey_deleted(&k))
- goto out;
-
- i->key_cache_already_flushed = true;
- i->flags |= BTREE_TRIGGER_NORUN;
-
- btree_path_set_should_be_locked(btree_path);
- ret = bch2_trans_update_by_path(trans, path_idx, i->k, flags, ip);
-out:
- bch2_path_put(trans, path_idx, true);
- return ret;
-}
-
-static int __must_check
-bch2_trans_update_by_path(struct btree_trans *trans, btree_path_idx_t path_idx,
- struct bkey_i *k, enum btree_update_flags flags,
- unsigned long ip)
-{
- struct bch_fs *c = trans->c;
- struct btree_insert_entry *i, n;
- int cmp;
-
- struct btree_path *path = trans->paths + path_idx;
- EBUG_ON(!path->should_be_locked);
- EBUG_ON(trans->nr_updates >= trans->nr_paths);
- EBUG_ON(!bpos_eq(k->k.p, path->pos));
-
- n = (struct btree_insert_entry) {
- .flags = flags,
- .bkey_type = __btree_node_type(path->level, path->btree_id),
- .btree_id = path->btree_id,
- .level = path->level,
- .cached = path->cached,
- .path = path_idx,
- .k = k,
- .ip_allocated = ip,
- };
-
-#ifdef CONFIG_BCACHEFS_DEBUG
- trans_for_each_update(trans, i)
- BUG_ON(i != trans->updates &&
- btree_insert_entry_cmp(i - 1, i) >= 0);
-#endif
-
- /*
- * Pending updates are kept sorted: first, find position of new update,
- * then delete/trim any updates the new update overwrites:
- */
- for (i = trans->updates; i < trans->updates + trans->nr_updates; i++) {
- cmp = btree_insert_entry_cmp(&n, i);
- if (cmp <= 0)
- break;
- }
-
- if (!cmp && i < trans->updates + trans->nr_updates) {
- EBUG_ON(i->insert_trigger_run || i->overwrite_trigger_run);
-
- bch2_path_put(trans, i->path, true);
- i->flags = n.flags;
- i->cached = n.cached;
- i->k = n.k;
- i->path = n.path;
- i->ip_allocated = n.ip_allocated;
- } else {
- array_insert_item(trans->updates, trans->nr_updates,
- i - trans->updates, n);
-
- i->old_v = bch2_btree_path_peek_slot_exact(path, &i->old_k).v;
- i->old_btree_u64s = !bkey_deleted(&i->old_k) ? i->old_k.u64s : 0;
-
- if (unlikely(trans->journal_replay_not_finished)) {
- struct bkey_i *j_k =
- bch2_journal_keys_peek_slot(c, n.btree_id, n.level, k->k.p);
-
- if (j_k) {
- i->old_k = j_k->k;
- i->old_v = &j_k->v;
- }
- }
- }
-
- __btree_path_get(trans->paths + i->path, true);
-
- /*
- * If a key is present in the key cache, it must also exist in the
- * btree - this is necessary for cache coherency. When iterating over
- * a btree that's cached in the key cache, the btree iter code checks
- * the key cache - but the key has to exist in the btree for that to
- * work:
- */
- if (path->cached && bkey_deleted(&i->old_k))
- return flush_new_cached_update(trans, i, flags, ip);
-
- return 0;
-}
-
-static noinline int bch2_trans_update_get_key_cache(struct btree_trans *trans,
- struct btree_iter *iter,
- struct btree_path *path)
-{
- struct btree_path *key_cache_path = btree_iter_key_cache_path(trans, iter);
-
- if (!key_cache_path ||
- !key_cache_path->should_be_locked ||
- !bpos_eq(key_cache_path->pos, iter->pos)) {
- struct bkey_cached *ck;
- int ret;
-
- if (!iter->key_cache_path)
- iter->key_cache_path =
- bch2_path_get(trans, path->btree_id, path->pos, 1, 0,
- BTREE_ITER_INTENT|
- BTREE_ITER_CACHED, _THIS_IP_);
-
- iter->key_cache_path =
- bch2_btree_path_set_pos(trans, iter->key_cache_path, path->pos,
- iter->flags & BTREE_ITER_INTENT,
- _THIS_IP_);
-
- ret = bch2_btree_path_traverse(trans, iter->key_cache_path, BTREE_ITER_CACHED);
- if (unlikely(ret))
- return ret;
-
- ck = (void *) trans->paths[iter->key_cache_path].l[0].b;
-
- if (test_bit(BKEY_CACHED_DIRTY, &ck->flags)) {
- trace_and_count(trans->c, trans_restart_key_cache_raced, trans, _RET_IP_);
- return btree_trans_restart(trans, BCH_ERR_transaction_restart_key_cache_raced);
- }
-
- btree_path_set_should_be_locked(trans->paths + iter->key_cache_path);
- }
-
- return 0;
-}
-
-int __must_check bch2_trans_update(struct btree_trans *trans, struct btree_iter *iter,
- struct bkey_i *k, enum btree_update_flags flags)
-{
- btree_path_idx_t path_idx = iter->update_path ?: iter->path;
- int ret;
-
- if (iter->flags & BTREE_ITER_IS_EXTENTS)
- return bch2_trans_update_extent(trans, iter, k, flags);
-
- if (bkey_deleted(&k->k) &&
- !(flags & BTREE_UPDATE_KEY_CACHE_RECLAIM) &&
- (iter->flags & BTREE_ITER_FILTER_SNAPSHOTS)) {
- ret = need_whiteout_for_snapshot(trans, iter->btree_id, k->k.p);
- if (unlikely(ret < 0))
- return ret;
-
- if (ret)
- k->k.type = KEY_TYPE_whiteout;
- }
-
- /*
- * Ensure that updates to cached btrees go to the key cache:
- */
- struct btree_path *path = trans->paths + path_idx;
- if (!(flags & BTREE_UPDATE_KEY_CACHE_RECLAIM) &&
- !path->cached &&
- !path->level &&
- btree_id_cached(trans->c, path->btree_id)) {
- ret = bch2_trans_update_get_key_cache(trans, iter, path);
- if (ret)
- return ret;
-
- path_idx = iter->key_cache_path;
- }
-
- return bch2_trans_update_by_path(trans, path_idx, k, flags, _RET_IP_);
-}
-
-int bch2_btree_insert_clone_trans(struct btree_trans *trans,
- enum btree_id btree,
- struct bkey_i *k)
-{
- struct bkey_i *n = bch2_trans_kmalloc(trans, bkey_bytes(&k->k));
- int ret = PTR_ERR_OR_ZERO(n);
- if (ret)
- return ret;
-
- bkey_copy(n, k);
- return bch2_btree_insert_trans(trans, btree, n, 0);
-}
-
-struct jset_entry *__bch2_trans_jset_entry_alloc(struct btree_trans *trans, unsigned u64s)
-{
- unsigned new_top = trans->journal_entries_u64s + u64s;
- unsigned old_size = trans->journal_entries_size;
-
- if (new_top > trans->journal_entries_size) {
- trans->journal_entries_size = roundup_pow_of_two(new_top);
-
- btree_trans_stats(trans)->journal_entries_size = trans->journal_entries_size;
- }
-
- struct jset_entry *n =
- bch2_trans_kmalloc_nomemzero(trans,
- trans->journal_entries_size * sizeof(u64));
- if (IS_ERR(n))
- return ERR_CAST(n);
-
- if (trans->journal_entries)
- memcpy(n, trans->journal_entries, old_size * sizeof(u64));
- trans->journal_entries = n;
-
- struct jset_entry *e = btree_trans_journal_entries_top(trans);
- trans->journal_entries_u64s = new_top;
- return e;
-}
-
-int bch2_bkey_get_empty_slot(struct btree_trans *trans, struct btree_iter *iter,
- enum btree_id btree, struct bpos end)
-{
- struct bkey_s_c k;
- int ret = 0;
-
- bch2_trans_iter_init(trans, iter, btree, POS_MAX, BTREE_ITER_INTENT);
- k = bch2_btree_iter_prev(iter);
- ret = bkey_err(k);
- if (ret)
- goto err;
-
- bch2_btree_iter_advance(iter);
- k = bch2_btree_iter_peek_slot(iter);
- ret = bkey_err(k);
- if (ret)
- goto err;
-
- BUG_ON(k.k->type != KEY_TYPE_deleted);
-
- if (bkey_gt(k.k->p, end)) {
- ret = -BCH_ERR_ENOSPC_btree_slot;
- goto err;
- }
-
- return 0;
-err:
- bch2_trans_iter_exit(trans, iter);
- return ret;
-}
-
-void bch2_trans_commit_hook(struct btree_trans *trans,
- struct btree_trans_commit_hook *h)
-{
- h->next = trans->hooks;
- trans->hooks = h;
-}
-
-int bch2_btree_insert_nonextent(struct btree_trans *trans,
- enum btree_id btree, struct bkey_i *k,
- enum btree_update_flags flags)
-{
- struct btree_iter iter;
- int ret;
-
- bch2_trans_iter_init(trans, &iter, btree, k->k.p,
- BTREE_ITER_CACHED|
- BTREE_ITER_NOT_EXTENTS|
- BTREE_ITER_INTENT);
- ret = bch2_btree_iter_traverse(&iter) ?:
- bch2_trans_update(trans, &iter, k, flags);
- bch2_trans_iter_exit(trans, &iter);
- return ret;
-}
-
-int bch2_btree_insert_trans(struct btree_trans *trans, enum btree_id id,
- struct bkey_i *k, enum btree_update_flags flags)
-{
- struct btree_iter iter;
- int ret;
-
- bch2_trans_iter_init(trans, &iter, id, bkey_start_pos(&k->k),
- BTREE_ITER_CACHED|
- BTREE_ITER_INTENT);
- ret = bch2_btree_iter_traverse(&iter) ?:
- bch2_trans_update(trans, &iter, k, flags);
- bch2_trans_iter_exit(trans, &iter);
- return ret;
-}
-
-/**
- * bch2_btree_insert - insert keys into the extent btree
- * @c: pointer to struct bch_fs
- * @id: btree to insert into
- * @k: key to insert
- * @disk_res: must be non-NULL whenever inserting or potentially
- * splitting data extents
- * @flags: transaction commit flags
- *
- * Returns: 0 on success, error code on failure
- */
-int bch2_btree_insert(struct bch_fs *c, enum btree_id id, struct bkey_i *k,
- struct disk_reservation *disk_res, int flags)
-{
- return bch2_trans_do(c, disk_res, NULL, flags,
- bch2_btree_insert_trans(trans, id, k, 0));
-}
-
-int bch2_btree_delete_extent_at(struct btree_trans *trans, struct btree_iter *iter,
- unsigned len, unsigned update_flags)
-{
- struct bkey_i *k;
-
- k = bch2_trans_kmalloc(trans, sizeof(*k));
- if (IS_ERR(k))
- return PTR_ERR(k);
-
- bkey_init(&k->k);
- k->k.p = iter->pos;
- bch2_key_resize(&k->k, len);
- return bch2_trans_update(trans, iter, k, update_flags);
-}
-
-int bch2_btree_delete_at(struct btree_trans *trans,
- struct btree_iter *iter, unsigned update_flags)
-{
- return bch2_btree_delete_extent_at(trans, iter, 0, update_flags);
-}
-
-int bch2_btree_delete(struct btree_trans *trans,
- enum btree_id btree, struct bpos pos,
- unsigned update_flags)
-{
- struct btree_iter iter;
- int ret;
-
- bch2_trans_iter_init(trans, &iter, btree, pos,
- BTREE_ITER_CACHED|
- BTREE_ITER_INTENT);
- ret = bch2_btree_iter_traverse(&iter) ?:
- bch2_btree_delete_at(trans, &iter, update_flags);
- bch2_trans_iter_exit(trans, &iter);
-
- return ret;
-}
-
-int bch2_btree_delete_range_trans(struct btree_trans *trans, enum btree_id id,
- struct bpos start, struct bpos end,
- unsigned update_flags,
- u64 *journal_seq)
-{
- u32 restart_count = trans->restart_count;
- struct btree_iter iter;
- struct bkey_s_c k;
- int ret = 0;
-
- bch2_trans_iter_init(trans, &iter, id, start, BTREE_ITER_INTENT);
- while ((k = bch2_btree_iter_peek_upto(&iter, end)).k) {
- struct disk_reservation disk_res =
- bch2_disk_reservation_init(trans->c, 0);
- struct bkey_i delete;
-
- ret = bkey_err(k);
- if (ret)
- goto err;
-
- bkey_init(&delete.k);
-
- /*
- * This could probably be more efficient for extents:
- */
-
- /*
- * For extents, iter.pos won't necessarily be the same as
- * bkey_start_pos(k.k) (for non extents they always will be the
- * same). It's important that we delete starting from iter.pos
- * because the range we want to delete could start in the middle
- * of k.
- *
- * (bch2_btree_iter_peek() does guarantee that iter.pos >=
- * bkey_start_pos(k.k)).
- */
- delete.k.p = iter.pos;
-
- if (iter.flags & BTREE_ITER_IS_EXTENTS)
- bch2_key_resize(&delete.k,
- bpos_min(end, k.k->p).offset -
- iter.pos.offset);
-
- ret = bch2_trans_update(trans, &iter, &delete, update_flags) ?:
- bch2_trans_commit(trans, &disk_res, journal_seq,
- BCH_TRANS_COMMIT_no_enospc);
- bch2_disk_reservation_put(trans->c, &disk_res);
-err:
- /*
- * the bch2_trans_begin() call is in a weird place because we
- * need to call it after every transaction commit, to avoid path
- * overflow, but don't want to call it if the delete operation
- * is a no-op and we have no work to do:
- */
- bch2_trans_begin(trans);
-
- if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
- ret = 0;
- if (ret)
- break;
- }
- bch2_trans_iter_exit(trans, &iter);
-
- return ret ?: trans_was_restarted(trans, restart_count);
-}
-
-/*
- * bch_btree_delete_range - delete everything within a given range
- *
- * Range is a half open interval - [start, end)
- */
-int bch2_btree_delete_range(struct bch_fs *c, enum btree_id id,
- struct bpos start, struct bpos end,
- unsigned update_flags,
- u64 *journal_seq)
-{
- int ret = bch2_trans_run(c,
- bch2_btree_delete_range_trans(trans, id, start, end,
- update_flags, journal_seq));
- if (ret == -BCH_ERR_transaction_restart_nested)
- ret = 0;
- return ret;
-}
-
-int bch2_btree_bit_mod(struct btree_trans *trans, enum btree_id btree,
- struct bpos pos, bool set)
-{
- struct bkey_i k;
-
- bkey_init(&k.k);
- k.k.type = set ? KEY_TYPE_set : KEY_TYPE_deleted;
- k.k.p = pos;
-
- return bch2_trans_update_buffered(trans, btree, &k);
-}
-
-static int __bch2_trans_log_msg(struct btree_trans *trans, struct printbuf *buf, unsigned u64s)
-{
- struct jset_entry *e = bch2_trans_jset_entry_alloc(trans, jset_u64s(u64s));
- int ret = PTR_ERR_OR_ZERO(e);
- if (ret)
- return ret;
-
- struct jset_entry_log *l = container_of(e, struct jset_entry_log, entry);
- journal_entry_init(e, BCH_JSET_ENTRY_log, 0, 1, u64s);
- memcpy(l->d, buf->buf, buf->pos);
- return 0;
-}
-
-__printf(3, 0)
-static int
-__bch2_fs_log_msg(struct bch_fs *c, unsigned commit_flags, const char *fmt,
- va_list args)
-{
- struct printbuf buf = PRINTBUF;
- prt_vprintf(&buf, fmt, args);
-
- unsigned u64s = DIV_ROUND_UP(buf.pos, sizeof(u64));
- prt_chars(&buf, '\0', u64s * sizeof(u64) - buf.pos);
-
- int ret = buf.allocation_failure ? -BCH_ERR_ENOMEM_trans_log_msg : 0;
- if (ret)
- goto err;
-
- if (!test_bit(JOURNAL_STARTED, &c->journal.flags)) {
- ret = darray_make_room(&c->journal.early_journal_entries, jset_u64s(u64s));
- if (ret)
- goto err;
-
- struct jset_entry_log *l = (void *) &darray_top(c->journal.early_journal_entries);
- journal_entry_init(&l->entry, BCH_JSET_ENTRY_log, 0, 1, u64s);
- memcpy(l->d, buf.buf, buf.pos);
- c->journal.early_journal_entries.nr += jset_u64s(u64s);
- } else {
- ret = bch2_trans_do(c, NULL, NULL,
- BCH_TRANS_COMMIT_lazy_rw|commit_flags,
- __bch2_trans_log_msg(trans, &buf, u64s));
- }
-err:
- printbuf_exit(&buf);
- return ret;
-}
-
-__printf(2, 3)
-int bch2_fs_log_msg(struct bch_fs *c, const char *fmt, ...)
-{
- va_list args;
- int ret;
-
- va_start(args, fmt);
- ret = __bch2_fs_log_msg(c, 0, fmt, args);
- va_end(args);
- return ret;
-}
-
-/*
- * Use for logging messages during recovery to enable reserved space and avoid
- * blocking.
- */
-__printf(2, 3)
-int bch2_journal_log_msg(struct bch_fs *c, const char *fmt, ...)
-{
- va_list args;
- int ret;
-
- va_start(args, fmt);
- ret = __bch2_fs_log_msg(c, BCH_WATERMARK_reclaim, fmt, args);
- va_end(args);
- return ret;
-}
projects / bcachefs-tools-debian / blobdiff