-#ifndef _BCACHE_JOURNAL_H
-#define _BCACHE_JOURNAL_H
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_JOURNAL_H
+#define _BCACHEFS_JOURNAL_H
/*
* THE JOURNAL:
#include "journal_types.h"
-/*
- * Only used for holding the journal entries we read in btree_journal_read()
- * during cache_registration
- */
-struct journal_replay {
- struct list_head list;
- struct jset j;
-};
+struct bch_fs;
-static inline struct jset_entry *__jset_entry_type_next(struct jset *jset,
- struct jset_entry *entry, unsigned type)
+static inline void journal_wake(struct journal *j)
{
- while (entry < vstruct_last(jset)) {
- if (entry->type == type)
- return entry;
-
- entry = vstruct_next(entry);
- }
-
- return NULL;
+ wake_up(&j->wait);
+ closure_wake_up(&j->async_wait);
+ closure_wake_up(&j->preres_wait);
}
-#define for_each_jset_entry_type(entry, jset, type) \
- for (entry = (jset)->start; \
- (entry = __jset_entry_type_next(jset, entry, type)); \
- entry = vstruct_next(entry))
-
-#define for_each_jset_key(k, _n, entry, jset) \
- for_each_jset_entry_type(entry, jset, JOURNAL_ENTRY_BTREE_KEYS) \
- vstruct_for_each_safe(entry, k, _n)
-
-#define JOURNAL_PIN (32 * 1024)
-
-static inline bool journal_pin_active(struct journal_entry_pin *pin)
+static inline struct journal_buf *journal_cur_buf(struct journal *j)
{
- return pin->pin_list != NULL;
+ return j->buf + j->reservations.idx;
}
-static inline struct journal_entry_pin_list *
-journal_seq_pin(struct journal *j, u64 seq)
+static inline struct journal_buf *journal_prev_buf(struct journal *j)
{
- return &j->pin.data[(size_t) seq & j->pin.mask];
+ return j->buf + !j->reservations.idx;
}
-void bch2_journal_pin_add(struct journal *, struct journal_res *,
- struct journal_entry_pin *, journal_pin_flush_fn);
-void bch2_journal_pin_drop(struct journal *, struct journal_entry_pin *);
-void bch2_journal_pin_add_if_older(struct journal *,
- struct journal_entry_pin *,
- struct journal_entry_pin *,
- journal_pin_flush_fn);
-void bch2_journal_flush_pins(struct journal *, u64);
+/* Sequence number of oldest dirty journal entry */
-struct closure;
-struct bch_fs;
-struct keylist;
+static inline u64 journal_last_seq(struct journal *j)
+{
+ return j->pin.front;
+}
-struct bkey_i *bch2_journal_find_btree_root(struct bch_fs *, struct jset *,
- enum btree_id, unsigned *);
+static inline u64 journal_cur_seq(struct journal *j)
+{
+ BUG_ON(j->pin.back - 1 != atomic64_read(&j->seq));
-int bch2_journal_seq_should_ignore(struct bch_fs *, u64, struct btree *);
+ return j->pin.back - 1;
+}
u64 bch2_inode_journal_seq(struct journal *, u64);
u64 inum)
{
struct journal_buf *buf = &j->buf[res->idx];
+ unsigned long bit = hash_64(inum, ilog2(sizeof(buf->has_inode) * 8));
- set_bit(hash_64(inum, ilog2(sizeof(buf->has_inode) * 8)), buf->has_inode);
+ /* avoid atomic op if possible */
+ if (unlikely(!test_bit(bit, buf->has_inode)))
+ set_bit(bit, buf->has_inode);
}
/*
return u64s + sizeof(struct jset_entry) / sizeof(u64);
}
-static inline void bch2_journal_add_entry_at(struct journal_buf *buf,
- unsigned offset,
- unsigned type, enum btree_id id,
- unsigned level,
- const void *data, size_t u64s)
+static inline int journal_entry_overhead(struct journal *j)
+{
+ return sizeof(struct jset) / sizeof(u64) + j->entry_u64s_reserved;
+}
+
+static inline struct jset_entry *
+bch2_journal_add_entry_noreservation(struct journal_buf *buf, size_t u64s)
{
- struct jset_entry *entry = vstruct_idx(buf->data, offset);
+ struct jset *jset = buf->data;
+ struct jset_entry *entry = vstruct_idx(jset, le32_to_cpu(jset->u64s));
+ memset(entry, 0, sizeof(*entry));
+ entry->u64s = cpu_to_le16(u64s);
+
+ le32_add_cpu(&jset->u64s, jset_u64s(u64s));
+
+ return entry;
+}
+
+static inline struct jset_entry *
+journal_res_entry(struct journal *j, struct journal_res *res)
+{
+ return vstruct_idx(j->buf[res->idx].data, res->offset);
+}
+
+static inline unsigned journal_entry_set(struct jset_entry *entry, unsigned type,
+ enum btree_id id, unsigned level,
+ const void *data, unsigned u64s)
+{
memset(entry, 0, sizeof(*entry));
entry->u64s = cpu_to_le16(u64s);
+ entry->type = type;
entry->btree_id = id;
entry->level = level;
- entry->type = type;
+ memcpy_u64s_small(entry->_data, data, u64s);
- memcpy_u64s(entry->_data, data, u64s);
+ return jset_u64s(u64s);
}
static inline void bch2_journal_add_entry(struct journal *j, struct journal_res *res,
unsigned level,
const void *data, unsigned u64s)
{
- struct journal_buf *buf = &j->buf[res->idx];
- unsigned actual = jset_u64s(u64s);
+ unsigned actual = journal_entry_set(journal_res_entry(j, res),
+ type, id, level, data, u64s);
EBUG_ON(!res->ref);
- BUG_ON(actual > res->u64s);
+ EBUG_ON(actual > res->u64s);
- bch2_journal_add_entry_at(buf, res->offset, type,
- id, level, data, u64s);
res->offset += actual;
res->u64s -= actual;
}
static inline void bch2_journal_add_keys(struct journal *j, struct journal_res *res,
enum btree_id id, const struct bkey_i *k)
{
- bch2_journal_add_entry(j, res, JOURNAL_ENTRY_BTREE_KEYS,
+ bch2_journal_add_entry(j, res, BCH_JSET_ENTRY_btree_keys,
id, 0, k, k->k.u64s);
}
-void bch2_journal_buf_put_slowpath(struct journal *, bool);
+static inline bool journal_entry_empty(struct jset *j)
+{
+ struct jset_entry *i;
+
+ if (j->seq != j->last_seq)
+ return false;
+
+ vstruct_for_each(j, i)
+ if (i->type == BCH_JSET_ENTRY_btree_keys && i->u64s)
+ return false;
+ return true;
+}
+
+void __bch2_journal_buf_put(struct journal *, bool);
static inline void bch2_journal_buf_put(struct journal *j, unsigned idx,
bool need_write_just_set)
.buf0_count = idx == 0,
.buf1_count = idx == 1,
}).v, &j->reservations.counter);
-
- EBUG_ON(s.idx != idx && !s.prev_buf_unwritten);
-
- /*
- * Do not initiate a journal write if the journal is in an error state
- * (previous journal entry write may have failed)
- */
- if (s.idx != idx &&
- !journal_state_count(s, idx) &&
- s.cur_entry_offset != JOURNAL_ENTRY_ERROR_VAL)
- bch2_journal_buf_put_slowpath(j, need_write_just_set);
+ if (!journal_state_count(s, idx)) {
+ EBUG_ON(s.idx == idx || !s.prev_buf_unwritten);
+ __bch2_journal_buf_put(j, need_write_just_set);
+ }
}
/*
if (!res->ref)
return;
- lock_release(&j->res_map, 0, _RET_IP_);
+ lock_release(&j->res_map, _THIS_IP_);
while (res->u64s)
bch2_journal_add_entry(j, res,
- JOURNAL_ENTRY_BTREE_KEYS,
+ BCH_JSET_ENTRY_btree_keys,
0, 0, NULL, 0);
bch2_journal_buf_put(j, res->idx, false);
}
int bch2_journal_res_get_slowpath(struct journal *, struct journal_res *,
- unsigned, unsigned);
+ unsigned);
+
+#define JOURNAL_RES_GET_NONBLOCK (1 << 0)
+#define JOURNAL_RES_GET_CHECK (1 << 1)
+#define JOURNAL_RES_GET_RESERVED (1 << 2)
+#define JOURNAL_RES_GET_RECLAIM (1 << 3)
static inline int journal_res_get_fast(struct journal *j,
struct journal_res *res,
- unsigned u64s_min,
- unsigned u64s_max)
+ unsigned flags)
{
union journal_res_state old, new;
u64 v = atomic64_read(&j->reservations.counter);
* Check if there is still room in the current journal
* entry:
*/
- if (old.cur_entry_offset + u64s_min > j->cur_entry_u64s)
+ if (new.cur_entry_offset + res->u64s > j->cur_entry_u64s)
return 0;
- res->offset = old.cur_entry_offset;
- res->u64s = min(u64s_max, j->cur_entry_u64s -
- old.cur_entry_offset);
+ EBUG_ON(!journal_state_count(new, new.idx));
+
+ if (!(flags & JOURNAL_RES_GET_RESERVED) &&
+ !test_bit(JOURNAL_MAY_GET_UNRESERVED, &j->flags))
+ return 0;
+
+ if (flags & JOURNAL_RES_GET_CHECK)
+ return 1;
- journal_state_inc(&new);
new.cur_entry_offset += res->u64s;
+ journal_state_inc(&new);
} while ((v = atomic64_cmpxchg(&j->reservations.counter,
old.v, new.v)) != old.v);
- res->ref = true;
- res->idx = new.idx;
- res->seq = le64_to_cpu(j->buf[res->idx].data->seq);
+ res->ref = true;
+ res->idx = old.idx;
+ res->offset = old.cur_entry_offset;
+ res->seq = le64_to_cpu(j->buf[old.idx].data->seq);
return 1;
}
static inline int bch2_journal_res_get(struct journal *j, struct journal_res *res,
- unsigned u64s_min, unsigned u64s_max)
+ unsigned u64s, unsigned flags)
{
int ret;
EBUG_ON(res->ref);
- EBUG_ON(u64s_max < u64s_min);
+ EBUG_ON(!test_bit(JOURNAL_STARTED, &j->flags));
- if (journal_res_get_fast(j, res, u64s_min, u64s_max))
+ res->u64s = u64s;
+
+ if (journal_res_get_fast(j, res, flags))
goto out;
- ret = bch2_journal_res_get_slowpath(j, res, u64s_min, u64s_max);
+ ret = bch2_journal_res_get_slowpath(j, res, flags);
if (ret)
return ret;
out:
- lock_acquire_shared(&j->res_map, 0, 0, NULL, _THIS_IP_);
- EBUG_ON(!res->ref);
+ if (!(flags & JOURNAL_RES_GET_CHECK)) {
+ lock_acquire_shared(&j->res_map, 0,
+ (flags & JOURNAL_RES_GET_NONBLOCK) != 0,
+ NULL, _THIS_IP_);
+ EBUG_ON(!res->ref);
+ }
return 0;
}
+/* journal_preres: */
+
+static inline bool journal_check_may_get_unreserved(struct journal *j)
+{
+ union journal_preres_state s = READ_ONCE(j->prereserved);
+ bool ret = s.reserved <= s.remaining &&
+ fifo_free(&j->pin) > 8;
+
+ lockdep_assert_held(&j->lock);
+
+ if (ret != test_bit(JOURNAL_MAY_GET_UNRESERVED, &j->flags)) {
+ if (ret) {
+ set_bit(JOURNAL_MAY_GET_UNRESERVED, &j->flags);
+ journal_wake(j);
+ } else {
+ clear_bit(JOURNAL_MAY_GET_UNRESERVED, &j->flags);
+ }
+ }
+ return ret;
+}
+
+static inline void bch2_journal_preres_put(struct journal *j,
+ struct journal_preres *res)
+{
+ union journal_preres_state s = { .reserved = res->u64s };
+
+ if (!res->u64s)
+ return;
+
+ s.v = atomic64_sub_return(s.v, &j->prereserved.counter);
+ res->u64s = 0;
+ closure_wake_up(&j->preres_wait);
+
+ if (s.reserved <= s.remaining &&
+ !test_bit(JOURNAL_MAY_GET_UNRESERVED, &j->flags)) {
+ spin_lock(&j->lock);
+ journal_check_may_get_unreserved(j);
+ spin_unlock(&j->lock);
+ }
+}
+
+int __bch2_journal_preres_get(struct journal *,
+ struct journal_preres *, unsigned, unsigned);
+
+static inline int bch2_journal_preres_get_fast(struct journal *j,
+ struct journal_preres *res,
+ unsigned new_u64s,
+ unsigned flags)
+{
+ int d = new_u64s - res->u64s;
+ union journal_preres_state old, new;
+ u64 v = atomic64_read(&j->prereserved.counter);
+
+ do {
+ old.v = new.v = v;
+
+ new.reserved += d;
+
+ /*
+ * If we're being called from the journal reclaim path, we have
+ * to unconditionally give out the pre-reservation, there's
+ * nothing else sensible we can do - otherwise we'd recurse back
+ * into the reclaim path and deadlock:
+ */
+
+ if (!(flags & JOURNAL_RES_GET_RECLAIM) &&
+ new.reserved > new.remaining)
+ return 0;
+ } while ((v = atomic64_cmpxchg(&j->prereserved.counter,
+ old.v, new.v)) != old.v);
+
+ res->u64s += d;
+ return 1;
+}
+
+static inline int bch2_journal_preres_get(struct journal *j,
+ struct journal_preres *res,
+ unsigned new_u64s,
+ unsigned flags)
+{
+ if (new_u64s <= res->u64s)
+ return 0;
+
+ if (bch2_journal_preres_get_fast(j, res, new_u64s, flags))
+ return 0;
+
+ if (flags & JOURNAL_RES_GET_NONBLOCK)
+ return -EAGAIN;
+
+ return __bch2_journal_preres_get(j, res, new_u64s, flags);
+}
+
+/* journal_entry_res: */
+
+void bch2_journal_entry_res_resize(struct journal *,
+ struct journal_entry_res *,
+ unsigned);
+
+u64 bch2_journal_last_unwritten_seq(struct journal *);
+int bch2_journal_open_seq_async(struct journal *, u64, struct closure *);
+
void bch2_journal_wait_on_seq(struct journal *, u64, struct closure *);
void bch2_journal_flush_seq_async(struct journal *, u64, struct closure *);
void bch2_journal_flush_async(struct journal *, struct closure *);
? -EIO : 0;
}
+struct bch_dev;
+
static inline bool journal_flushes_device(struct bch_dev *ca)
{
return true;
}
-void bch2_journal_start(struct bch_fs *);
-int bch2_journal_mark(struct bch_fs *, struct list_head *);
-void bch2_journal_entries_free(struct list_head *);
-int bch2_journal_read(struct bch_fs *, struct list_head *);
-int bch2_journal_replay(struct bch_fs *, struct list_head *);
-
static inline void bch2_journal_set_replay_done(struct journal *j)
{
BUG_ON(!test_bit(JOURNAL_STARTED, &j->flags));
set_bit(JOURNAL_REPLAY_DONE, &j->flags);
}
+void bch2_journal_unblock(struct journal *);
+void bch2_journal_block(struct journal *);
+
ssize_t bch2_journal_print_debug(struct journal *, char *);
ssize_t bch2_journal_print_pins(struct journal *, char *);
+int bch2_set_nr_journal_buckets(struct bch_fs *, struct bch_dev *,
+ unsigned nr);
int bch2_dev_journal_alloc(struct bch_dev *);
-static inline unsigned bch2_nr_journal_buckets(struct bch_sb_field_journal *j)
-{
- return j
- ? (__le64 *) vstruct_end(&j->field) - j->buckets
- : 0;
-}
-
-int bch2_journal_move(struct bch_dev *);
+void bch2_dev_journal_stop(struct journal *, struct bch_dev *);
void bch2_fs_journal_stop(struct journal *);
+int bch2_fs_journal_start(struct journal *, u64, struct list_head *);
+
void bch2_dev_journal_exit(struct bch_dev *);
int bch2_dev_journal_init(struct bch_dev *, struct bch_sb *);
void bch2_fs_journal_exit(struct journal *);
int bch2_fs_journal_init(struct journal *);
-#endif /* _BCACHE_JOURNAL_H */
+#endif /* _BCACHEFS_JOURNAL_H */
projects / bcachefs-tools-debian / blobdiff