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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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2ee47eec44
This fixes a regression from the patch bcachefs: Fix copygc dying on startup In general only the allocator thread itself should be updating ca->allocator_state, the thread waking up the allocator setting it is an ugly hack only needed to avoid racing with the copygc threads when we're first starting up. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
136 lines
3.4 KiB
C
136 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_ALLOC_BACKGROUND_H
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#define _BCACHEFS_ALLOC_BACKGROUND_H
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#include "bcachefs.h"
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#include "alloc_types.h"
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#include "debug.h"
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extern const char * const bch2_allocator_states[];
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struct bkey_alloc_unpacked {
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u64 bucket;
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u8 dev;
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u8 gen;
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u8 oldest_gen;
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u8 data_type;
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#define x(_name, _bits) u##_bits _name;
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BCH_ALLOC_FIELDS_V2()
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#undef x
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};
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struct bkey_alloc_buf {
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struct bkey_i k;
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union {
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struct {
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#define x(_name, _bits) + _bits / 8
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u8 _pad[8 + BCH_ALLOC_FIELDS_V1()];
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#undef x
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} _v1;
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struct {
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#define x(_name, _bits) + 8 + _bits / 8
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u8 _pad[8 + BCH_ALLOC_FIELDS_V2()];
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#undef x
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} _v2;
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};
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} __attribute__((packed, aligned(8)));
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/* How out of date a pointer gen is allowed to be: */
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#define BUCKET_GC_GEN_MAX 96U
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/* returns true if not equal */
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static inline bool bkey_alloc_unpacked_cmp(struct bkey_alloc_unpacked l,
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struct bkey_alloc_unpacked r)
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{
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return l.gen != r.gen ||
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l.oldest_gen != r.oldest_gen ||
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l.data_type != r.data_type
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#define x(_name, ...) || l._name != r._name
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BCH_ALLOC_FIELDS_V2()
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#undef x
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;
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}
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struct bkey_alloc_unpacked bch2_alloc_unpack(struct bkey_s_c);
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void bch2_alloc_pack(struct bch_fs *, struct bkey_alloc_buf *,
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const struct bkey_alloc_unpacked);
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int bch2_bucket_io_time_reset(struct btree_trans *, unsigned, size_t, int);
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static inline struct bkey_alloc_unpacked
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alloc_mem_to_key(struct btree_iter *iter,
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struct bucket *g, struct bucket_mark m)
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{
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return (struct bkey_alloc_unpacked) {
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.dev = iter->pos.inode,
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.bucket = iter->pos.offset,
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.gen = m.gen,
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.oldest_gen = g->oldest_gen,
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.data_type = m.data_type,
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.dirty_sectors = m.dirty_sectors,
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.cached_sectors = m.cached_sectors,
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.read_time = g->io_time[READ],
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.write_time = g->io_time[WRITE],
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};
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}
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#define ALLOC_SCAN_BATCH(ca) max_t(size_t, 1, (ca)->mi.nbuckets >> 9)
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const char *bch2_alloc_v1_invalid(const struct bch_fs *, struct bkey_s_c);
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const char *bch2_alloc_v2_invalid(const struct bch_fs *, struct bkey_s_c);
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void bch2_alloc_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
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#define bch2_bkey_ops_alloc (struct bkey_ops) { \
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.key_invalid = bch2_alloc_v1_invalid, \
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.val_to_text = bch2_alloc_to_text, \
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}
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#define bch2_bkey_ops_alloc_v2 (struct bkey_ops) { \
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.key_invalid = bch2_alloc_v2_invalid, \
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.val_to_text = bch2_alloc_to_text, \
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}
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struct journal_keys;
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int bch2_alloc_read(struct bch_fs *, struct journal_keys *);
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static inline void bch2_wake_allocator(struct bch_dev *ca)
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{
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struct task_struct *p;
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rcu_read_lock();
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p = rcu_dereference(ca->alloc_thread);
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if (p)
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wake_up_process(p);
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rcu_read_unlock();
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}
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static inline void verify_not_on_freelist(struct bch_fs *c, struct bch_dev *ca,
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size_t bucket)
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{
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if (bch2_expensive_debug_checks) {
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size_t iter;
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long i;
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unsigned j;
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for (j = 0; j < RESERVE_NR; j++)
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fifo_for_each_entry(i, &ca->free[j], iter)
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BUG_ON(i == bucket);
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fifo_for_each_entry(i, &ca->free_inc, iter)
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BUG_ON(i == bucket);
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}
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}
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void bch2_recalc_capacity(struct bch_fs *);
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void bch2_dev_allocator_remove(struct bch_fs *, struct bch_dev *);
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void bch2_dev_allocator_add(struct bch_fs *, struct bch_dev *);
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void bch2_dev_allocator_quiesce(struct bch_fs *, struct bch_dev *);
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void bch2_dev_allocator_stop(struct bch_dev *);
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int bch2_dev_allocator_start(struct bch_dev *);
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int bch2_alloc_write(struct bch_fs *, unsigned);
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void bch2_fs_allocator_background_init(struct bch_fs *);
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#endif /* _BCACHEFS_ALLOC_BACKGROUND_H */
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