+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _BCACHEFS_BTREE_ITER_H
-#define _BCACHEFS_BTREE_ITER_H
-
-#include "bset.h"
-#include "btree_types.h"
-#include "trace.h"
-
-static inline int __bkey_err(const struct bkey *k)
-{
- return PTR_ERR_OR_ZERO(k);
-}
-
-#define bkey_err(_k) __bkey_err((_k).k)
-
-static inline void __btree_path_get(struct btree_path *path, bool intent)
-{
- path->ref++;
- path->intent_ref += intent;
-}
-
-static inline bool __btree_path_put(struct btree_path *path, bool intent)
-{
- EBUG_ON(!path->ref);
- EBUG_ON(!path->intent_ref && intent);
- path->intent_ref -= intent;
- return --path->ref == 0;
-}
-
-static inline void btree_path_set_dirty(struct btree_path *path,
- enum btree_path_uptodate u)
-{
- path->uptodate = max_t(unsigned, path->uptodate, u);
-}
-
-static inline struct btree *btree_path_node(struct btree_path *path,
- unsigned level)
-{
- return level < BTREE_MAX_DEPTH ? path->l[level].b : NULL;
-}
-
-static inline bool btree_node_lock_seq_matches(const struct btree_path *path,
- const struct btree *b, unsigned level)
-{
- return path->l[level].lock_seq == six_lock_seq(&b->c.lock);
-}
-
-static inline struct btree *btree_node_parent(struct btree_path *path,
- struct btree *b)
-{
- return btree_path_node(path, b->c.level + 1);
-}
-
-/* Iterate over paths within a transaction: */
-
-void __bch2_btree_trans_sort_paths(struct btree_trans *);
-
-static inline void btree_trans_sort_paths(struct btree_trans *trans)
-{
- if (!IS_ENABLED(CONFIG_BCACHEFS_DEBUG) &&
- trans->paths_sorted)
- return;
- __bch2_btree_trans_sort_paths(trans);
-}
-
-static inline unsigned long *trans_paths_nr(struct btree_path *paths)
-{
- return &container_of(paths, struct btree_trans_paths, paths[0])->nr_paths;
-}
-
-static inline unsigned long *trans_paths_allocated(struct btree_path *paths)
-{
- unsigned long *v = trans_paths_nr(paths);
- return v - BITS_TO_LONGS(*v);
-}
-
-#define trans_for_each_path_idx_from(_paths_allocated, _nr, _idx, _start)\
- for (_idx = _start; \
- (_idx = find_next_bit(_paths_allocated, _nr, _idx)) < _nr; \
- _idx++)
-
-static inline struct btree_path *
-__trans_next_path(struct btree_trans *trans, unsigned *idx)
-{
- unsigned long *w = trans->paths_allocated + *idx / BITS_PER_LONG;
- /*
- * Open coded find_next_bit(), because
- * - this is fast path, we can't afford the function call
- * - and we know that nr_paths is a multiple of BITS_PER_LONG,
- */
- while (*idx < trans->nr_paths) {
- unsigned long v = *w >> (*idx & (BITS_PER_LONG - 1));
- if (v) {
- *idx += __ffs(v);
- return trans->paths + *idx;
- }
-
- *idx += BITS_PER_LONG;
- *idx &= ~(BITS_PER_LONG - 1);
- w++;
- }
-
- return NULL;
-}
-
-/*
- * This version is intended to be safe for use on a btree_trans that is owned by
- * another thread, for bch2_btree_trans_to_text();
- */
-#define trans_for_each_path_from(_trans, _path, _idx, _start) \
- for (_idx = _start; \
- (_path = __trans_next_path((_trans), &_idx)); \
- _idx++)
-
-#define trans_for_each_path(_trans, _path, _idx) \
- trans_for_each_path_from(_trans, _path, _idx, 1)
-
-static inline struct btree_path *next_btree_path(struct btree_trans *trans, struct btree_path *path)
-{
- unsigned idx = path ? path->sorted_idx + 1 : 0;
-
- EBUG_ON(idx > trans->nr_sorted);
-
- return idx < trans->nr_sorted
- ? trans->paths + trans->sorted[idx]
- : NULL;
-}
-
-static inline struct btree_path *prev_btree_path(struct btree_trans *trans, struct btree_path *path)
-{
- unsigned idx = path ? path->sorted_idx : trans->nr_sorted;
-
- return idx
- ? trans->paths + trans->sorted[idx - 1]
- : NULL;
-}
-
-#define trans_for_each_path_idx_inorder(_trans, _iter) \
- for (_iter = (struct trans_for_each_path_inorder_iter) { 0 }; \
- (_iter.path_idx = trans->sorted[_iter.sorted_idx], \
- _iter.sorted_idx < (_trans)->nr_sorted); \
- _iter.sorted_idx++)
-
-struct trans_for_each_path_inorder_iter {
- btree_path_idx_t sorted_idx;
- btree_path_idx_t path_idx;
-};
-
-#define trans_for_each_path_inorder(_trans, _path, _iter) \
- for (_iter = (struct trans_for_each_path_inorder_iter) { 0 }; \
- (_iter.path_idx = trans->sorted[_iter.sorted_idx], \
- _path = (_trans)->paths + _iter.path_idx, \
- _iter.sorted_idx < (_trans)->nr_sorted); \
- _iter.sorted_idx++)
-
-#define trans_for_each_path_inorder_reverse(_trans, _path, _i) \
- for (_i = trans->nr_sorted - 1; \
- ((_path) = (_trans)->paths + trans->sorted[_i]), (_i) >= 0;\
- --_i)
-
-static inline bool __path_has_node(const struct btree_path *path,
- const struct btree *b)
-{
- return path->l[b->c.level].b == b &&
- btree_node_lock_seq_matches(path, b, b->c.level);
-}
-
-static inline struct btree_path *
-__trans_next_path_with_node(struct btree_trans *trans, struct btree *b,
- unsigned *idx)
-{
- struct btree_path *path;
-
- while ((path = __trans_next_path(trans, idx)) &&
- !__path_has_node(path, b))
- (*idx)++;
-
- return path;
-}
-
-#define trans_for_each_path_with_node(_trans, _b, _path, _iter) \
- for (_iter = 1; \
- (_path = __trans_next_path_with_node((_trans), (_b), &_iter));\
- _iter++)
-
-btree_path_idx_t __bch2_btree_path_make_mut(struct btree_trans *, btree_path_idx_t,
- bool, unsigned long);
-
-static inline btree_path_idx_t __must_check
-bch2_btree_path_make_mut(struct btree_trans *trans,
- btree_path_idx_t path, bool intent,
- unsigned long ip)
-{
- if (trans->paths[path].ref > 1 ||
- trans->paths[path].preserve)
- path = __bch2_btree_path_make_mut(trans, path, intent, ip);
- trans->paths[path].should_be_locked = false;
- return path;
-}
-
-btree_path_idx_t __must_check
-__bch2_btree_path_set_pos(struct btree_trans *, btree_path_idx_t,
- struct bpos, bool, unsigned long);
-
-static inline btree_path_idx_t __must_check
-bch2_btree_path_set_pos(struct btree_trans *trans,
- btree_path_idx_t path, struct bpos new_pos,
- bool intent, unsigned long ip)
-{
- return !bpos_eq(new_pos, trans->paths[path].pos)
- ? __bch2_btree_path_set_pos(trans, path, new_pos, intent, ip)
- : path;
-}
-
-int __must_check bch2_btree_path_traverse_one(struct btree_trans *,
- btree_path_idx_t,
- unsigned, unsigned long);
-
-static inline int __must_check bch2_btree_path_traverse(struct btree_trans *trans,
- btree_path_idx_t path, unsigned flags)
-{
- if (trans->paths[path].uptodate < BTREE_ITER_NEED_RELOCK)
- return 0;
-
- return bch2_btree_path_traverse_one(trans, path, flags, _RET_IP_);
-}
-
-btree_path_idx_t bch2_path_get(struct btree_trans *, enum btree_id, struct bpos,
- unsigned, unsigned, unsigned, unsigned long);
-struct bkey_s_c bch2_btree_path_peek_slot(struct btree_path *, struct bkey *);
-
-/*
- * bch2_btree_path_peek_slot() for a cached iterator might return a key in a
- * different snapshot:
- */
-static inline struct bkey_s_c bch2_btree_path_peek_slot_exact(struct btree_path *path, struct bkey *u)
-{
- struct bkey_s_c k = bch2_btree_path_peek_slot(path, u);
-
- if (k.k && bpos_eq(path->pos, k.k->p))
- return k;
-
- bkey_init(u);
- u->p = path->pos;
- return (struct bkey_s_c) { u, NULL };
-}
-
-struct bkey_i *bch2_btree_journal_peek_slot(struct btree_trans *,
- struct btree_iter *, struct bpos);
-
-void bch2_btree_path_level_init(struct btree_trans *, struct btree_path *, struct btree *);
-
-int __bch2_trans_mutex_lock(struct btree_trans *, struct mutex *);
-
-static inline int bch2_trans_mutex_lock(struct btree_trans *trans, struct mutex *lock)
-{
- return mutex_trylock(lock)
- ? 0
- : __bch2_trans_mutex_lock(trans, lock);
-}
-
-#ifdef CONFIG_BCACHEFS_DEBUG
-void bch2_trans_verify_paths(struct btree_trans *);
-void bch2_assert_pos_locked(struct btree_trans *, enum btree_id,
- struct bpos, bool);
-#else
-static inline void bch2_trans_verify_paths(struct btree_trans *trans) {}
-static inline void bch2_assert_pos_locked(struct btree_trans *trans, enum btree_id id,
- struct bpos pos, bool key_cache) {}
-#endif
-
-void bch2_btree_path_fix_key_modified(struct btree_trans *trans,
- struct btree *, struct bkey_packed *);
-void bch2_btree_node_iter_fix(struct btree_trans *trans, struct btree_path *,
- struct btree *, struct btree_node_iter *,
- struct bkey_packed *, unsigned, unsigned);
-
-int bch2_btree_path_relock_intent(struct btree_trans *, struct btree_path *);
-
-void bch2_path_put(struct btree_trans *, btree_path_idx_t, bool);
-
-int bch2_trans_relock(struct btree_trans *);
-int bch2_trans_relock_notrace(struct btree_trans *);
-void bch2_trans_unlock(struct btree_trans *);
-void bch2_trans_unlock_long(struct btree_trans *);
-bool bch2_trans_locked(struct btree_trans *);
-
-static inline int trans_was_restarted(struct btree_trans *trans, u32 restart_count)
-{
- return restart_count != trans->restart_count
- ? -BCH_ERR_transaction_restart_nested
- : 0;
-}
-
-void __noreturn bch2_trans_restart_error(struct btree_trans *, u32);
-
-static inline void bch2_trans_verify_not_restarted(struct btree_trans *trans,
- u32 restart_count)
-{
- if (trans_was_restarted(trans, restart_count))
- bch2_trans_restart_error(trans, restart_count);
-}
-
-void __noreturn bch2_trans_in_restart_error(struct btree_trans *);
-
-static inline void bch2_trans_verify_not_in_restart(struct btree_trans *trans)
-{
- if (trans->restarted)
- bch2_trans_in_restart_error(trans);
-}
-
-__always_inline
-static int btree_trans_restart_nounlock(struct btree_trans *trans, int err)
-{
- BUG_ON(err <= 0);
- BUG_ON(!bch2_err_matches(-err, BCH_ERR_transaction_restart));
-
- trans->restarted = err;
- trans->last_restarted_ip = _THIS_IP_;
- return -err;
-}
-
-__always_inline
-static int btree_trans_restart(struct btree_trans *trans, int err)
-{
- btree_trans_restart_nounlock(trans, err);
- return -err;
-}
-
-bool bch2_btree_node_upgrade(struct btree_trans *,
- struct btree_path *, unsigned);
-
-void __bch2_btree_path_downgrade(struct btree_trans *, struct btree_path *, unsigned);
-
-static inline void bch2_btree_path_downgrade(struct btree_trans *trans,
- struct btree_path *path)
-{
- unsigned new_locks_want = path->level + !!path->intent_ref;
-
- if (path->locks_want > new_locks_want)
- __bch2_btree_path_downgrade(trans, path, new_locks_want);
-}
-
-void bch2_trans_downgrade(struct btree_trans *);
-
-void bch2_trans_node_add(struct btree_trans *trans, struct btree_path *, struct btree *);
-void bch2_trans_node_reinit_iter(struct btree_trans *, struct btree *);
-
-int __must_check __bch2_btree_iter_traverse(struct btree_iter *iter);
-int __must_check bch2_btree_iter_traverse(struct btree_iter *);
-
-struct btree *bch2_btree_iter_peek_node(struct btree_iter *);
-struct btree *bch2_btree_iter_peek_node_and_restart(struct btree_iter *);
-struct btree *bch2_btree_iter_next_node(struct btree_iter *);
-
-struct bkey_s_c bch2_btree_iter_peek_upto(struct btree_iter *, struct bpos);
-struct bkey_s_c bch2_btree_iter_next(struct btree_iter *);
-
-static inline struct bkey_s_c bch2_btree_iter_peek(struct btree_iter *iter)
-{
- return bch2_btree_iter_peek_upto(iter, SPOS_MAX);
-}
-
-struct bkey_s_c bch2_btree_iter_peek_prev(struct btree_iter *);
-struct bkey_s_c bch2_btree_iter_prev(struct btree_iter *);
-
-struct bkey_s_c bch2_btree_iter_peek_slot(struct btree_iter *);
-struct bkey_s_c bch2_btree_iter_next_slot(struct btree_iter *);
-struct bkey_s_c bch2_btree_iter_prev_slot(struct btree_iter *);
-
-bool bch2_btree_iter_advance(struct btree_iter *);
-bool bch2_btree_iter_rewind(struct btree_iter *);
-
-static inline void __bch2_btree_iter_set_pos(struct btree_iter *iter, struct bpos new_pos)
-{
- iter->k.type = KEY_TYPE_deleted;
- iter->k.p.inode = iter->pos.inode = new_pos.inode;
- iter->k.p.offset = iter->pos.offset = new_pos.offset;
- iter->k.p.snapshot = iter->pos.snapshot = new_pos.snapshot;
- iter->k.size = 0;
-}
-
-static inline void bch2_btree_iter_set_pos(struct btree_iter *iter, struct bpos new_pos)
-{
- struct btree_trans *trans = iter->trans;
-
- if (unlikely(iter->update_path))
- bch2_path_put(trans, iter->update_path,
- iter->flags & BTREE_ITER_INTENT);
- iter->update_path = 0;
-
- if (!(iter->flags & BTREE_ITER_ALL_SNAPSHOTS))
- new_pos.snapshot = iter->snapshot;
-
- __bch2_btree_iter_set_pos(iter, new_pos);
-}
-
-static inline void bch2_btree_iter_set_pos_to_extent_start(struct btree_iter *iter)
-{
- BUG_ON(!(iter->flags & BTREE_ITER_IS_EXTENTS));
- iter->pos = bkey_start_pos(&iter->k);
-}
-
-static inline void bch2_btree_iter_set_snapshot(struct btree_iter *iter, u32 snapshot)
-{
- struct bpos pos = iter->pos;
-
- iter->snapshot = snapshot;
- pos.snapshot = snapshot;
- bch2_btree_iter_set_pos(iter, pos);
-}
-
-void bch2_trans_iter_exit(struct btree_trans *, struct btree_iter *);
-
-static inline unsigned __bch2_btree_iter_flags(struct btree_trans *trans,
- unsigned btree_id,
- unsigned flags)
-{
- if (!(flags & (BTREE_ITER_ALL_SNAPSHOTS|BTREE_ITER_NOT_EXTENTS)) &&
- btree_id_is_extents(btree_id))
- flags |= BTREE_ITER_IS_EXTENTS;
-
- if (!(flags & __BTREE_ITER_ALL_SNAPSHOTS) &&
- !btree_type_has_snapshot_field(btree_id))
- flags &= ~BTREE_ITER_ALL_SNAPSHOTS;
-
- if (!(flags & BTREE_ITER_ALL_SNAPSHOTS) &&
- btree_type_has_snapshots(btree_id))
- flags |= BTREE_ITER_FILTER_SNAPSHOTS;
-
- if (trans->journal_replay_not_finished)
- flags |= BTREE_ITER_WITH_JOURNAL;
-
- return flags;
-}
-
-static inline unsigned bch2_btree_iter_flags(struct btree_trans *trans,
- unsigned btree_id,
- unsigned flags)
-{
- if (!btree_id_cached(trans->c, btree_id)) {
- flags &= ~BTREE_ITER_CACHED;
- flags &= ~BTREE_ITER_WITH_KEY_CACHE;
- } else if (!(flags & BTREE_ITER_CACHED))
- flags |= BTREE_ITER_WITH_KEY_CACHE;
-
- return __bch2_btree_iter_flags(trans, btree_id, flags);
-}
-
-static inline void bch2_trans_iter_init_common(struct btree_trans *trans,
- struct btree_iter *iter,
- unsigned btree_id, struct bpos pos,
- unsigned locks_want,
- unsigned depth,
- unsigned flags,
- unsigned long ip)
-{
- iter->trans = trans;
- iter->update_path = 0;
- iter->key_cache_path = 0;
- iter->btree_id = btree_id;
- iter->min_depth = 0;
- iter->flags = flags;
- iter->snapshot = pos.snapshot;
- iter->pos = pos;
- iter->k = POS_KEY(pos);
- iter->journal_idx = 0;
-#ifdef CONFIG_BCACHEFS_DEBUG
- iter->ip_allocated = ip;
-#endif
- iter->path = bch2_path_get(trans, btree_id, iter->pos,
- locks_want, depth, flags, ip);
-}
-
-void bch2_trans_iter_init_outlined(struct btree_trans *, struct btree_iter *,
- enum btree_id, struct bpos, unsigned);
-
-static inline void bch2_trans_iter_init(struct btree_trans *trans,
- struct btree_iter *iter,
- unsigned btree_id, struct bpos pos,
- unsigned flags)
-{
- if (__builtin_constant_p(btree_id) &&
- __builtin_constant_p(flags))
- bch2_trans_iter_init_common(trans, iter, btree_id, pos, 0, 0,
- bch2_btree_iter_flags(trans, btree_id, flags),
- _THIS_IP_);
- else
- bch2_trans_iter_init_outlined(trans, iter, btree_id, pos, flags);
-}
-
-void bch2_trans_node_iter_init(struct btree_trans *, struct btree_iter *,
- enum btree_id, struct bpos,
- unsigned, unsigned, unsigned);
-void bch2_trans_copy_iter(struct btree_iter *, struct btree_iter *);
-
-static inline void set_btree_iter_dontneed(struct btree_iter *iter)
-{
- struct btree_trans *trans = iter->trans;
-
- if (!trans->restarted)
- btree_iter_path(trans, iter)->preserve = false;
-}
-
-void *__bch2_trans_kmalloc(struct btree_trans *, size_t);
-
-static inline void *bch2_trans_kmalloc(struct btree_trans *trans, size_t size)
-{
- size = roundup(size, 8);
-
- if (likely(trans->mem_top + size <= trans->mem_bytes)) {
- void *p = trans->mem + trans->mem_top;
-
- trans->mem_top += size;
- memset(p, 0, size);
- return p;
- } else {
- return __bch2_trans_kmalloc(trans, size);
- }
-}
-
-static inline void *bch2_trans_kmalloc_nomemzero(struct btree_trans *trans, size_t size)
-{
- size = round_up(size, 8);
-
- if (likely(trans->mem_top + size <= trans->mem_bytes)) {
- void *p = trans->mem + trans->mem_top;
-
- trans->mem_top += size;
- return p;
- } else {
- return __bch2_trans_kmalloc(trans, size);
- }
-}
-
-static inline struct bkey_s_c __bch2_bkey_get_iter(struct btree_trans *trans,
- struct btree_iter *iter,
- unsigned btree_id, struct bpos pos,
- unsigned flags, unsigned type)
-{
- struct bkey_s_c k;
-
- bch2_trans_iter_init(trans, iter, btree_id, pos, flags);
- k = bch2_btree_iter_peek_slot(iter);
-
- if (!bkey_err(k) && type && k.k->type != type)
- k = bkey_s_c_err(-BCH_ERR_ENOENT_bkey_type_mismatch);
- if (unlikely(bkey_err(k)))
- bch2_trans_iter_exit(trans, iter);
- return k;
-}
-
-static inline struct bkey_s_c bch2_bkey_get_iter(struct btree_trans *trans,
- struct btree_iter *iter,
- unsigned btree_id, struct bpos pos,
- unsigned flags)
-{
- return __bch2_bkey_get_iter(trans, iter, btree_id, pos, flags, 0);
-}
-
-#define bch2_bkey_get_iter_typed(_trans, _iter, _btree_id, _pos, _flags, _type)\
- bkey_s_c_to_##_type(__bch2_bkey_get_iter(_trans, _iter, \
- _btree_id, _pos, _flags, KEY_TYPE_##_type))
-
-static inline int __bch2_bkey_get_val_typed(struct btree_trans *trans,
- unsigned btree_id, struct bpos pos,
- unsigned flags, unsigned type,
- unsigned val_size, void *val)
-{
- struct btree_iter iter;
- struct bkey_s_c k;
- int ret;
-
- k = __bch2_bkey_get_iter(trans, &iter, btree_id, pos, flags, type);
- ret = bkey_err(k);
- if (!ret) {
- unsigned b = min_t(unsigned, bkey_val_bytes(k.k), val_size);
-
- memcpy(val, k.v, b);
- if (unlikely(b < sizeof(*val)))
- memset((void *) val + b, 0, sizeof(*val) - b);
- bch2_trans_iter_exit(trans, &iter);
- }
-
- return ret;
-}
-
-#define bch2_bkey_get_val_typed(_trans, _btree_id, _pos, _flags, _type, _val)\
- __bch2_bkey_get_val_typed(_trans, _btree_id, _pos, _flags, \
- KEY_TYPE_##_type, sizeof(*_val), _val)
-
-void bch2_trans_srcu_unlock(struct btree_trans *);
-
-u32 bch2_trans_begin(struct btree_trans *);
-
-/*
- * XXX
- * this does not handle transaction restarts from bch2_btree_iter_next_node()
- * correctly
- */
-#define __for_each_btree_node(_trans, _iter, _btree_id, _start, \
- _locks_want, _depth, _flags, _b, _ret) \
- for (bch2_trans_node_iter_init((_trans), &(_iter), (_btree_id), \
- _start, _locks_want, _depth, _flags); \
- (_b) = bch2_btree_iter_peek_node_and_restart(&(_iter)), \
- !((_ret) = PTR_ERR_OR_ZERO(_b)) && (_b); \
- (_b) = bch2_btree_iter_next_node(&(_iter)))
-
-#define for_each_btree_node(_trans, _iter, _btree_id, _start, \
- _flags, _b, _ret) \
- __for_each_btree_node(_trans, _iter, _btree_id, _start, \
- 0, 0, _flags, _b, _ret)
-
-static inline struct bkey_s_c bch2_btree_iter_peek_prev_type(struct btree_iter *iter,
- unsigned flags)
-{
- return flags & BTREE_ITER_SLOTS ? bch2_btree_iter_peek_slot(iter) :
- bch2_btree_iter_peek_prev(iter);
-}
-
-static inline struct bkey_s_c bch2_btree_iter_peek_type(struct btree_iter *iter,
- unsigned flags)
-{
- return flags & BTREE_ITER_SLOTS ? bch2_btree_iter_peek_slot(iter) :
- bch2_btree_iter_peek(iter);
-}
-
-static inline struct bkey_s_c bch2_btree_iter_peek_upto_type(struct btree_iter *iter,
- struct bpos end,
- unsigned flags)
-{
- if (!(flags & BTREE_ITER_SLOTS))
- return bch2_btree_iter_peek_upto(iter, end);
-
- if (bkey_gt(iter->pos, end))
- return bkey_s_c_null;
-
- return bch2_btree_iter_peek_slot(iter);
-}
-
-int __bch2_btree_trans_too_many_iters(struct btree_trans *);
-
-static inline int btree_trans_too_many_iters(struct btree_trans *trans)
-{
- if (bitmap_weight(trans->paths_allocated, trans->nr_paths) > BTREE_ITER_INITIAL - 8)
- return __bch2_btree_trans_too_many_iters(trans);
-
- return 0;
-}
-
-/*
- * goto instead of loop, so that when used inside for_each_btree_key2()
- * break/continue work correctly
- */
-#define lockrestart_do(_trans, _do) \
-({ \
- __label__ transaction_restart; \
- u32 _restart_count; \
- int _ret2; \
-transaction_restart: \
- _restart_count = bch2_trans_begin(_trans); \
- _ret2 = (_do); \
- \
- if (bch2_err_matches(_ret2, BCH_ERR_transaction_restart)) \
- goto transaction_restart; \
- \
- if (!_ret2) \
- bch2_trans_verify_not_restarted(_trans, _restart_count);\
- _ret2; \
-})
-
-/*
- * nested_lockrestart_do(), nested_commit_do():
- *
- * These are like lockrestart_do() and commit_do(), with two differences:
- *
- * - We don't call bch2_trans_begin() unless we had a transaction restart
- * - We return -BCH_ERR_transaction_restart_nested if we succeeded after a
- * transaction restart
- */
-#define nested_lockrestart_do(_trans, _do) \
-({ \
- u32 _restart_count, _orig_restart_count; \
- int _ret2; \
- \
- _restart_count = _orig_restart_count = (_trans)->restart_count; \
- \
- while (bch2_err_matches(_ret2 = (_do), BCH_ERR_transaction_restart))\
- _restart_count = bch2_trans_begin(_trans); \
- \
- if (!_ret2) \
- bch2_trans_verify_not_restarted(_trans, _restart_count);\
- \
- _ret2 ?: trans_was_restarted(_trans, _restart_count); \
-})
-
-#define for_each_btree_key_upto(_trans, _iter, _btree_id, \
- _start, _end, _flags, _k, _do) \
-({ \
- struct btree_iter _iter; \
- struct bkey_s_c _k; \
- int _ret3 = 0; \
- \
- bch2_trans_iter_init((_trans), &(_iter), (_btree_id), \
- (_start), (_flags)); \
- \
- do { \
- _ret3 = lockrestart_do(_trans, ({ \
- (_k) = bch2_btree_iter_peek_upto_type(&(_iter), \
- _end, (_flags)); \
- if (!(_k).k) \
- break; \
- \
- bkey_err(_k) ?: (_do); \
- })); \
- } while (!_ret3 && bch2_btree_iter_advance(&(_iter))); \
- \
- bch2_trans_iter_exit((_trans), &(_iter)); \
- _ret3; \
-})
-
-#define for_each_btree_key(_trans, _iter, _btree_id, \
- _start, _flags, _k, _do) \
- for_each_btree_key_upto(_trans, _iter, _btree_id, _start, \
- SPOS_MAX, _flags, _k, _do)
-
-#define for_each_btree_key_reverse(_trans, _iter, _btree_id, \
- _start, _flags, _k, _do) \
-({ \
- struct btree_iter _iter; \
- struct bkey_s_c _k; \
- int _ret3 = 0; \
- \
- bch2_trans_iter_init((_trans), &(_iter), (_btree_id), \
- (_start), (_flags)); \
- \
- do { \
- _ret3 = lockrestart_do(_trans, ({ \
- (_k) = bch2_btree_iter_peek_prev_type(&(_iter), \
- (_flags)); \
- if (!(_k).k) \
- break; \
- \
- bkey_err(_k) ?: (_do); \
- })); \
- } while (!_ret3 && bch2_btree_iter_rewind(&(_iter))); \
- \
- bch2_trans_iter_exit((_trans), &(_iter)); \
- _ret3; \
-})
-
-#define for_each_btree_key_commit(_trans, _iter, _btree_id, \
- _start, _iter_flags, _k, \
- _disk_res, _journal_seq, _commit_flags,\
- _do) \
- for_each_btree_key(_trans, _iter, _btree_id, _start, _iter_flags, _k,\
- (_do) ?: bch2_trans_commit(_trans, (_disk_res),\
- (_journal_seq), (_commit_flags)))
-
-#define for_each_btree_key_reverse_commit(_trans, _iter, _btree_id, \
- _start, _iter_flags, _k, \
- _disk_res, _journal_seq, _commit_flags,\
- _do) \
- for_each_btree_key_reverse(_trans, _iter, _btree_id, _start, _iter_flags, _k,\
- (_do) ?: bch2_trans_commit(_trans, (_disk_res),\
- (_journal_seq), (_commit_flags)))
-
-#define for_each_btree_key_upto_commit(_trans, _iter, _btree_id, \
- _start, _end, _iter_flags, _k, \
- _disk_res, _journal_seq, _commit_flags,\
- _do) \
- for_each_btree_key_upto(_trans, _iter, _btree_id, _start, _end, _iter_flags, _k,\
- (_do) ?: bch2_trans_commit(_trans, (_disk_res),\
- (_journal_seq), (_commit_flags)))
-
-struct bkey_s_c bch2_btree_iter_peek_and_restart_outlined(struct btree_iter *);
-
-static inline struct bkey_s_c
-__bch2_btree_iter_peek_and_restart(struct btree_trans *trans,
- struct btree_iter *iter, unsigned flags)
-{
- struct bkey_s_c k;
-
- while (btree_trans_too_many_iters(trans) ||
- (k = bch2_btree_iter_peek_type(iter, flags),
- bch2_err_matches(bkey_err(k), BCH_ERR_transaction_restart)))
- bch2_trans_begin(trans);
-
- return k;
-}
-
-#define for_each_btree_key_old(_trans, _iter, _btree_id, \
- _start, _flags, _k, _ret) \
- for (bch2_trans_iter_init((_trans), &(_iter), (_btree_id), \
- (_start), (_flags)); \
- (_k) = __bch2_btree_iter_peek_and_restart((_trans), &(_iter), _flags),\
- !((_ret) = bkey_err(_k)) && (_k).k; \
- bch2_btree_iter_advance(&(_iter)))
-
-#define for_each_btree_key_upto_norestart(_trans, _iter, _btree_id, \
- _start, _end, _flags, _k, _ret) \
- for (bch2_trans_iter_init((_trans), &(_iter), (_btree_id), \
- (_start), (_flags)); \
- (_k) = bch2_btree_iter_peek_upto_type(&(_iter), _end, _flags),\
- !((_ret) = bkey_err(_k)) && (_k).k; \
- bch2_btree_iter_advance(&(_iter)))
-
-#define for_each_btree_key_upto_continue_norestart(_iter, _end, _flags, _k, _ret)\
- for (; \
- (_k) = bch2_btree_iter_peek_upto_type(&(_iter), _end, _flags), \
- !((_ret) = bkey_err(_k)) && (_k).k; \
- bch2_btree_iter_advance(&(_iter)))
-
-#define for_each_btree_key_norestart(_trans, _iter, _btree_id, \
- _start, _flags, _k, _ret) \
- for_each_btree_key_upto_norestart(_trans, _iter, _btree_id, _start,\
- SPOS_MAX, _flags, _k, _ret)
-
-#define for_each_btree_key_continue_norestart(_iter, _flags, _k, _ret) \
- for_each_btree_key_upto_continue_norestart(_iter, SPOS_MAX, _flags, _k, _ret)
-
-#define drop_locks_do(_trans, _do) \
-({ \
- bch2_trans_unlock(_trans); \
- _do ?: bch2_trans_relock(_trans); \
-})
-
-#define allocate_dropping_locks_errcode(_trans, _do) \
-({ \
- gfp_t _gfp = GFP_NOWAIT|__GFP_NOWARN; \
- int _ret = _do; \
- \
- if (bch2_err_matches(_ret, ENOMEM)) { \
- _gfp = GFP_KERNEL; \
- _ret = drop_locks_do(trans, _do); \
- } \
- _ret; \
-})
-
-#define allocate_dropping_locks(_trans, _ret, _do) \
-({ \
- gfp_t _gfp = GFP_NOWAIT|__GFP_NOWARN; \
- typeof(_do) _p = _do; \
- \
- _ret = 0; \
- if (unlikely(!_p)) { \
- _gfp = GFP_KERNEL; \
- _ret = drop_locks_do(trans, ((_p = _do), 0)); \
- } \
- _p; \
-})
-
-void bch2_trans_updates_to_text(struct printbuf *, struct btree_trans *);
-void bch2_trans_paths_to_text(struct printbuf *, struct btree_trans *);
-void bch2_dump_trans_updates(struct btree_trans *);
-void bch2_dump_trans_paths_updates(struct btree_trans *);
-
-struct btree_trans *__bch2_trans_get(struct bch_fs *, unsigned);
-void bch2_trans_put(struct btree_trans *);
-
-extern const char *bch2_btree_transaction_fns[BCH_TRANSACTIONS_NR];
-unsigned bch2_trans_get_fn_idx(const char *);
-
-#define bch2_trans_get(_c) \
-({ \
- static unsigned trans_fn_idx; \
- \
- if (unlikely(!trans_fn_idx)) \
- trans_fn_idx = bch2_trans_get_fn_idx(__func__); \
- __bch2_trans_get(_c, trans_fn_idx); \
-})
-
-void bch2_btree_trans_to_text(struct printbuf *, struct btree_trans *);
-
-void bch2_fs_btree_iter_exit(struct bch_fs *);
-void bch2_fs_btree_iter_init_early(struct bch_fs *);
-int bch2_fs_btree_iter_init(struct bch_fs *);
-
-#endif /* _BCACHEFS_BTREE_ITER_H */
projects / bcachefs-tools-debian / blobdiff