diff options
Diffstat (limited to 'fs/bcachefs/alloc_foreground.c')
| -rw-r--r-- | fs/bcachefs/alloc_foreground.c | 1798 |
1 files changed, 0 insertions, 1798 deletions
diff --git a/fs/bcachefs/alloc_foreground.c b/fs/bcachefs/alloc_foreground.c deleted file mode 100644 index 27d97c22ae27..000000000000 --- a/fs/bcachefs/alloc_foreground.c +++ /dev/null @@ -1,1798 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright 2012 Google, Inc. - * - * Foreground allocator code: allocate buckets from freelist, and allocate in - * sector granularity from writepoints. - * - * bch2_bucket_alloc() allocates a single bucket from a specific device. - * - * bch2_bucket_alloc_set() allocates one or more buckets from different devices - * in a given filesystem. - */ - -#include "bcachefs.h" -#include "alloc_background.h" -#include "alloc_foreground.h" -#include "backpointers.h" -#include "btree_iter.h" -#include "btree_update.h" -#include "btree_gc.h" -#include "buckets.h" -#include "buckets_waiting_for_journal.h" -#include "clock.h" -#include "debug.h" -#include "disk_groups.h" -#include "ec.h" -#include "error.h" -#include "io_write.h" -#include "journal.h" -#include "movinggc.h" -#include "nocow_locking.h" -#include "trace.h" - -#include <linux/math64.h> -#include <linux/rculist.h> -#include <linux/rcupdate.h> - -static void bch2_trans_mutex_lock_norelock(struct btree_trans *trans, - struct mutex *lock) -{ - if (!mutex_trylock(lock)) { - bch2_trans_unlock(trans); - mutex_lock(lock); - } -} - -const char * const bch2_watermarks[] = { -#define x(t) #t, - BCH_WATERMARKS() -#undef x - NULL -}; - -/* - * Open buckets represent a bucket that's currently being allocated from. They - * serve two purposes: - * - * - They track buckets that have been partially allocated, allowing for - * sub-bucket sized allocations - they're used by the sector allocator below - * - * - They provide a reference to the buckets they own that mark and sweep GC - * can find, until the new allocation has a pointer to it inserted into the - * btree - * - * When allocating some space with the sector allocator, the allocation comes - * with a reference to an open bucket - the caller is required to put that - * reference _after_ doing the index update that makes its allocation reachable. - */ - -void bch2_reset_alloc_cursors(struct bch_fs *c) -{ - rcu_read_lock(); - for_each_member_device_rcu(c, ca, NULL) - memset(ca->alloc_cursor, 0, sizeof(ca->alloc_cursor)); - rcu_read_unlock(); -} - -static void bch2_open_bucket_hash_add(struct bch_fs *c, struct open_bucket *ob) -{ - open_bucket_idx_t idx = ob - c->open_buckets; - open_bucket_idx_t *slot = open_bucket_hashslot(c, ob->dev, ob->bucket); - - ob->hash = *slot; - *slot = idx; -} - -static void bch2_open_bucket_hash_remove(struct bch_fs *c, struct open_bucket *ob) -{ - open_bucket_idx_t idx = ob - c->open_buckets; - open_bucket_idx_t *slot = open_bucket_hashslot(c, ob->dev, ob->bucket); - - while (*slot != idx) { - BUG_ON(!*slot); - slot = &c->open_buckets[*slot].hash; - } - - *slot = ob->hash; - ob->hash = 0; -} - -void __bch2_open_bucket_put(struct bch_fs *c, struct open_bucket *ob) -{ - struct bch_dev *ca = ob_dev(c, ob); - - if (ob->ec) { - ec_stripe_new_put(c, ob->ec, STRIPE_REF_io); - return; - } - - percpu_down_read(&c->mark_lock); - spin_lock(&ob->lock); - - ob->valid = false; - ob->data_type = 0; - - spin_unlock(&ob->lock); - percpu_up_read(&c->mark_lock); - - spin_lock(&c->freelist_lock); - bch2_open_bucket_hash_remove(c, ob); - - ob->freelist = c->open_buckets_freelist; - c->open_buckets_freelist = ob - c->open_buckets; - - c->open_buckets_nr_free++; - ca->nr_open_buckets--; - spin_unlock(&c->freelist_lock); - - closure_wake_up(&c->open_buckets_wait); -} - -void bch2_open_bucket_write_error(struct bch_fs *c, - struct open_buckets *obs, - unsigned dev) -{ - struct open_bucket *ob; - unsigned i; - - open_bucket_for_each(c, obs, ob, i) - if (ob->dev == dev && ob->ec) - bch2_ec_bucket_cancel(c, ob); -} - -static struct open_bucket *bch2_open_bucket_alloc(struct bch_fs *c) -{ - struct open_bucket *ob; - - BUG_ON(!c->open_buckets_freelist || !c->open_buckets_nr_free); - - ob = c->open_buckets + c->open_buckets_freelist; - c->open_buckets_freelist = ob->freelist; - atomic_set(&ob->pin, 1); - ob->data_type = 0; - - c->open_buckets_nr_free--; - return ob; -} - -static void open_bucket_free_unused(struct bch_fs *c, struct open_bucket *ob) -{ - BUG_ON(c->open_buckets_partial_nr >= - ARRAY_SIZE(c->open_buckets_partial)); - - spin_lock(&c->freelist_lock); - ob->on_partial_list = true; - c->open_buckets_partial[c->open_buckets_partial_nr++] = - ob - c->open_buckets; - spin_unlock(&c->freelist_lock); - - closure_wake_up(&c->open_buckets_wait); - closure_wake_up(&c->freelist_wait); -} - -/* _only_ for allocating the journal on a new device: */ -long bch2_bucket_alloc_new_fs(struct bch_dev *ca) -{ - while (ca->new_fs_bucket_idx < ca->mi.nbuckets) { - u64 b = ca->new_fs_bucket_idx++; - - if (!is_superblock_bucket(ca, b) && - (!ca->buckets_nouse || !test_bit(b, ca->buckets_nouse))) - return b; - } - - return -1; -} - -static inline unsigned open_buckets_reserved(enum bch_watermark watermark) -{ - switch (watermark) { - case BCH_WATERMARK_interior_updates: - return 0; - case BCH_WATERMARK_reclaim: - return OPEN_BUCKETS_COUNT / 6; - case BCH_WATERMARK_btree: - case BCH_WATERMARK_btree_copygc: - return OPEN_BUCKETS_COUNT / 4; - case BCH_WATERMARK_copygc: - return OPEN_BUCKETS_COUNT / 3; - default: - return OPEN_BUCKETS_COUNT / 2; - } -} - -static struct open_bucket *__try_alloc_bucket(struct bch_fs *c, struct bch_dev *ca, - u64 bucket, - enum bch_watermark watermark, - const struct bch_alloc_v4 *a, - struct bucket_alloc_state *s, - struct closure *cl) -{ - struct open_bucket *ob; - - if (unlikely(ca->buckets_nouse && test_bit(bucket, ca->buckets_nouse))) { - s->skipped_nouse++; - return NULL; - } - - if (bch2_bucket_is_open(c, ca->dev_idx, bucket)) { - s->skipped_open++; - return NULL; - } - - if (bch2_bucket_needs_journal_commit(&c->buckets_waiting_for_journal, - c->journal.flushed_seq_ondisk, ca->dev_idx, bucket)) { - s->skipped_need_journal_commit++; - return NULL; - } - - if (bch2_bucket_nocow_is_locked(&c->nocow_locks, POS(ca->dev_idx, bucket))) { - s->skipped_nocow++; - return NULL; - } - - spin_lock(&c->freelist_lock); - - if (unlikely(c->open_buckets_nr_free <= open_buckets_reserved(watermark))) { - if (cl) - closure_wait(&c->open_buckets_wait, cl); - - track_event_change(&c->times[BCH_TIME_blocked_allocate_open_bucket], true); - spin_unlock(&c->freelist_lock); - return ERR_PTR(-BCH_ERR_open_buckets_empty); - } - - /* Recheck under lock: */ - if (bch2_bucket_is_open(c, ca->dev_idx, bucket)) { - spin_unlock(&c->freelist_lock); - s->skipped_open++; - return NULL; - } - - ob = bch2_open_bucket_alloc(c); - - spin_lock(&ob->lock); - - ob->valid = true; - ob->sectors_free = ca->mi.bucket_size; - ob->dev = ca->dev_idx; - ob->gen = a->gen; - ob->bucket = bucket; - spin_unlock(&ob->lock); - - ca->nr_open_buckets++; - bch2_open_bucket_hash_add(c, ob); - - track_event_change(&c->times[BCH_TIME_blocked_allocate_open_bucket], false); - track_event_change(&c->times[BCH_TIME_blocked_allocate], false); - - spin_unlock(&c->freelist_lock); - return ob; -} - -static struct open_bucket *try_alloc_bucket(struct btree_trans *trans, struct bch_dev *ca, - enum bch_watermark watermark, u64 free_entry, - struct bucket_alloc_state *s, - struct bkey_s_c freespace_k, - struct closure *cl) -{ - struct bch_fs *c = trans->c; - struct btree_iter iter = { NULL }; - struct bkey_s_c k; - struct open_bucket *ob; - struct bch_alloc_v4 a_convert; - const struct bch_alloc_v4 *a; - u64 b = free_entry & ~(~0ULL << 56); - unsigned genbits = free_entry >> 56; - struct printbuf buf = PRINTBUF; - int ret; - - if (b < ca->mi.first_bucket || b >= ca->mi.nbuckets) { - prt_printf(&buf, "freespace btree has bucket outside allowed range %u-%llu\n" - " freespace key ", - ca->mi.first_bucket, ca->mi.nbuckets); - bch2_bkey_val_to_text(&buf, c, freespace_k); - bch2_trans_inconsistent(trans, "%s", buf.buf); - ob = ERR_PTR(-EIO); - goto err; - } - - k = bch2_bkey_get_iter(trans, &iter, - BTREE_ID_alloc, POS(ca->dev_idx, b), - BTREE_ITER_cached); - ret = bkey_err(k); - if (ret) { - ob = ERR_PTR(ret); - goto err; - } - - a = bch2_alloc_to_v4(k, &a_convert); - - if (a->data_type != BCH_DATA_free) { - if (c->curr_recovery_pass <= BCH_RECOVERY_PASS_check_alloc_info) { - ob = NULL; - goto err; - } - - prt_printf(&buf, "non free bucket in freespace btree\n" - " freespace key "); - bch2_bkey_val_to_text(&buf, c, freespace_k); - prt_printf(&buf, "\n "); - bch2_bkey_val_to_text(&buf, c, k); - bch2_trans_inconsistent(trans, "%s", buf.buf); - ob = ERR_PTR(-EIO); - goto err; - } - - if (genbits != (alloc_freespace_genbits(*a) >> 56) && - c->curr_recovery_pass > BCH_RECOVERY_PASS_check_alloc_info) { - prt_printf(&buf, "bucket in freespace btree with wrong genbits (got %u should be %llu)\n" - " freespace key ", - genbits, alloc_freespace_genbits(*a) >> 56); - bch2_bkey_val_to_text(&buf, c, freespace_k); - prt_printf(&buf, "\n "); - bch2_bkey_val_to_text(&buf, c, k); - bch2_trans_inconsistent(trans, "%s", buf.buf); - ob = ERR_PTR(-EIO); - goto err; - } - - if (c->curr_recovery_pass <= BCH_RECOVERY_PASS_check_extents_to_backpointers) { - struct bch_backpointer bp; - struct bpos bp_pos = POS_MIN; - - ret = bch2_get_next_backpointer(trans, ca, POS(ca->dev_idx, b), -1, - &bp_pos, &bp, - BTREE_ITER_nopreserve); - if (ret) { - ob = ERR_PTR(ret); - goto err; - } - - if (!bkey_eq(bp_pos, POS_MAX)) { - /* - * Bucket may have data in it - we don't call - * bc2h_trans_inconnsistent() because fsck hasn't - * finished yet - */ - ob = NULL; - goto err; - } - } - - ob = __try_alloc_bucket(c, ca, b, watermark, a, s, cl); - if (!ob) - bch2_set_btree_iter_dontneed(&iter); -err: - if (iter.path) - bch2_set_btree_iter_dontneed(&iter); - bch2_trans_iter_exit(trans, &iter); - printbuf_exit(&buf); - return ob; -} - -/* - * This path is for before the freespace btree is initialized: - * - * If ca->new_fs_bucket_idx is nonzero, we haven't yet marked superblock & - * journal buckets - journal buckets will be < ca->new_fs_bucket_idx - */ -static noinline struct open_bucket * -bch2_bucket_alloc_early(struct btree_trans *trans, - struct bch_dev *ca, - enum bch_watermark watermark, - struct bucket_alloc_state *s, - struct closure *cl) -{ - struct btree_iter iter, citer; - struct bkey_s_c k, ck; - struct open_bucket *ob = NULL; - u64 first_bucket = max_t(u64, ca->mi.first_bucket, ca->new_fs_bucket_idx); - u64 *dev_alloc_cursor = &ca->alloc_cursor[s->btree_bitmap]; - u64 alloc_start = max(first_bucket, *dev_alloc_cursor); - u64 alloc_cursor = alloc_start; - int ret; - - /* - * Scan with an uncached iterator to avoid polluting the key cache. An - * uncached iter will return a cached key if one exists, but if not - * there is no other underlying protection for the associated key cache - * slot. To avoid racing bucket allocations, look up the cached key slot - * of any likely allocation candidate before attempting to proceed with - * the allocation. This provides proper exclusion on the associated - * bucket. - */ -again: - for_each_btree_key_norestart(trans, iter, BTREE_ID_alloc, POS(ca->dev_idx, alloc_cursor), - BTREE_ITER_slots, k, ret) { - u64 bucket = k.k->p.offset; - - if (bkey_ge(k.k->p, POS(ca->dev_idx, ca->mi.nbuckets))) - break; - - if (ca->new_fs_bucket_idx && - is_superblock_bucket(ca, k.k->p.offset)) - continue; - - if (s->btree_bitmap != BTREE_BITMAP_ANY && - s->btree_bitmap != bch2_dev_btree_bitmap_marked_sectors(ca, - bucket_to_sector(ca, bucket), ca->mi.bucket_size)) { - if (s->btree_bitmap == BTREE_BITMAP_YES && - bucket_to_sector(ca, bucket) > 64ULL << ca->mi.btree_bitmap_shift) - break; - - bucket = sector_to_bucket(ca, - round_up(bucket_to_sector(ca, bucket) + 1, - 1ULL << ca->mi.btree_bitmap_shift)); - bch2_btree_iter_set_pos(&iter, POS(ca->dev_idx, bucket)); - s->buckets_seen++; - s->skipped_mi_btree_bitmap++; - continue; - } - - struct bch_alloc_v4 a_convert; - const struct bch_alloc_v4 *a = bch2_alloc_to_v4(k, &a_convert); - if (a->data_type != BCH_DATA_free) - continue; - - /* now check the cached key to serialize concurrent allocs of the bucket */ - ck = bch2_bkey_get_iter(trans, &citer, BTREE_ID_alloc, k.k->p, BTREE_ITER_cached); - ret = bkey_err(ck); - if (ret) - break; - - a = bch2_alloc_to_v4(ck, &a_convert); - if (a->data_type != BCH_DATA_free) - goto next; - - s->buckets_seen++; - - ob = __try_alloc_bucket(trans->c, ca, k.k->p.offset, watermark, a, s, cl); -next: - bch2_set_btree_iter_dontneed(&citer); - bch2_trans_iter_exit(trans, &citer); - if (ob) - break; - } - bch2_trans_iter_exit(trans, &iter); - - alloc_cursor = iter.pos.offset; - - if (!ob && ret) - ob = ERR_PTR(ret); - - if (!ob && alloc_start > first_bucket) { - alloc_cursor = alloc_start = first_bucket; - goto again; - } - - *dev_alloc_cursor = alloc_cursor; - - return ob; -} - -static struct open_bucket *bch2_bucket_alloc_freelist(struct btree_trans *trans, - struct bch_dev *ca, - enum bch_watermark watermark, - struct bucket_alloc_state *s, - struct closure *cl) -{ - struct btree_iter iter; - struct bkey_s_c k; - struct open_bucket *ob = NULL; - u64 *dev_alloc_cursor = &ca->alloc_cursor[s->btree_bitmap]; - u64 alloc_start = max_t(u64, ca->mi.first_bucket, READ_ONCE(*dev_alloc_cursor)); - u64 alloc_cursor = alloc_start; - int ret; - - BUG_ON(ca->new_fs_bucket_idx); -again: - for_each_btree_key_norestart(trans, iter, BTREE_ID_freespace, - POS(ca->dev_idx, alloc_cursor), 0, k, ret) { - if (k.k->p.inode != ca->dev_idx) - break; - - for (alloc_cursor = max(alloc_cursor, bkey_start_offset(k.k)); - alloc_cursor < k.k->p.offset; - alloc_cursor++) { - ret = btree_trans_too_many_iters(trans); - if (ret) { - ob = ERR_PTR(ret); - break; - } - - s->buckets_seen++; - - u64 bucket = alloc_cursor & ~(~0ULL << 56); - if (s->btree_bitmap != BTREE_BITMAP_ANY && - s->btree_bitmap != bch2_dev_btree_bitmap_marked_sectors(ca, - bucket_to_sector(ca, bucket), ca->mi.bucket_size)) { - if (s->btree_bitmap == BTREE_BITMAP_YES && - bucket_to_sector(ca, bucket) > 64ULL << ca->mi.btree_bitmap_shift) - goto fail; - - bucket = sector_to_bucket(ca, - round_up(bucket_to_sector(ca, bucket) + 1, - 1ULL << ca->mi.btree_bitmap_shift)); - u64 genbits = alloc_cursor >> 56; - alloc_cursor = bucket | (genbits << 56); - - if (alloc_cursor > k.k->p.offset) - bch2_btree_iter_set_pos(&iter, POS(ca->dev_idx, alloc_cursor)); - s->skipped_mi_btree_bitmap++; - continue; - } - - ob = try_alloc_bucket(trans, ca, watermark, - alloc_cursor, s, k, cl); - if (ob) { - bch2_set_btree_iter_dontneed(&iter); - break; - } - } - - if (ob || ret) - break; - } -fail: - bch2_trans_iter_exit(trans, &iter); - - if (!ob && ret) - ob = ERR_PTR(ret); - - if (!ob && alloc_start > ca->mi.first_bucket) { - alloc_cursor = alloc_start = ca->mi.first_bucket; - goto again; - } - - *dev_alloc_cursor = alloc_cursor; - - return ob; -} - -static noinline void trace_bucket_alloc2(struct bch_fs *c, struct bch_dev *ca, - enum bch_watermark watermark, - enum bch_data_type data_type, - struct closure *cl, - struct bch_dev_usage *usage, - struct bucket_alloc_state *s, - struct open_bucket *ob) -{ - struct printbuf buf = PRINTBUF; - - printbuf_tabstop_push(&buf, 24); - - prt_printf(&buf, "dev\t%s (%u)\n", ca->name, ca->dev_idx); - prt_printf(&buf, "watermark\t%s\n", bch2_watermarks[watermark]); - prt_printf(&buf, "data type\t%s\n", __bch2_data_types[data_type]); - prt_printf(&buf, "blocking\t%u\n", cl != NULL); - prt_printf(&buf, "free\t%llu\n", usage->d[BCH_DATA_free].buckets); - prt_printf(&buf, "avail\t%llu\n", dev_buckets_free(ca, *usage, watermark)); - prt_printf(&buf, "copygc_wait\t%lu/%lli\n", - bch2_copygc_wait_amount(c), - c->copygc_wait - atomic64_read(&c->io_clock[WRITE].now)); - prt_printf(&buf, "seen\t%llu\n", s->buckets_seen); - prt_printf(&buf, "open\t%llu\n", s->skipped_open); - prt_printf(&buf, "need journal commit\t%llu\n", s->skipped_need_journal_commit); - prt_printf(&buf, "nocow\t%llu\n", s->skipped_nocow); - prt_printf(&buf, "nouse\t%llu\n", s->skipped_nouse); - prt_printf(&buf, "mi_btree_bitmap\t%llu\n", s->skipped_mi_btree_bitmap); - - if (!IS_ERR(ob)) { - prt_printf(&buf, "allocated\t%llu\n", ob->bucket); - trace_bucket_alloc(c, buf.buf); - } else { - prt_printf(&buf, "err\t%s\n", bch2_err_str(PTR_ERR(ob))); - trace_bucket_alloc_fail(c, buf.buf); - } - - printbuf_exit(&buf); -} - -/** - * bch2_bucket_alloc_trans - allocate a single bucket from a specific device - * @trans: transaction object - * @ca: device to allocate from - * @watermark: how important is this allocation? - * @data_type: BCH_DATA_journal, btree, user... - * @cl: if not NULL, closure to be used to wait if buckets not available - * @usage: for secondarily also returning the current device usage - * - * Returns: an open_bucket on success, or an ERR_PTR() on failure. - */ -static struct open_bucket *bch2_bucket_alloc_trans(struct btree_trans *trans, - struct bch_dev *ca, - enum bch_watermark watermark, - enum bch_data_type data_type, - struct closure *cl, - struct bch_dev_usage *usage) -{ - struct bch_fs *c = trans->c; - struct open_bucket *ob = NULL; - bool freespace = READ_ONCE(ca->mi.freespace_initialized); - u64 avail; - struct bucket_alloc_state s = { - .btree_bitmap = data_type == BCH_DATA_btree, - }; - bool waiting = false; -again: - bch2_dev_usage_read_fast(ca, usage); - avail = dev_buckets_free(ca, *usage, watermark); - - if (usage->d[BCH_DATA_need_discard].buckets > avail) - bch2_dev_do_discards(ca); - - if (usage->d[BCH_DATA_need_gc_gens].buckets > avail) - bch2_gc_gens_async(c); - - if (should_invalidate_buckets(ca, *usage)) - bch2_dev_do_invalidates(ca); - - if (!avail) { - if (cl && !waiting) { - closure_wait(&c->freelist_wait, cl); - waiting = true; - goto again; - } - - track_event_change(&c->times[BCH_TIME_blocked_allocate], true); - - ob = ERR_PTR(-BCH_ERR_freelist_empty); - goto err; - } - - if (waiting) - closure_wake_up(&c->freelist_wait); -alloc: - ob = likely(freespace) - ? bch2_bucket_alloc_freelist(trans, ca, watermark, &s, cl) - : bch2_bucket_alloc_early(trans, ca, watermark, &s, cl); - - if (s.skipped_need_journal_commit * 2 > avail) - bch2_journal_flush_async(&c->journal, NULL); - - if (!ob && s.btree_bitmap != BTREE_BITMAP_ANY) { - s.btree_bitmap = BTREE_BITMAP_ANY; - goto alloc; - } - - if (!ob && freespace && c->curr_recovery_pass <= BCH_RECOVERY_PASS_check_alloc_info) { - freespace = false; - goto alloc; - } -err: - if (!ob) - ob = ERR_PTR(-BCH_ERR_no_buckets_found); - - if (!IS_ERR(ob)) - ob->data_type = data_type; - - if (!IS_ERR(ob)) - count_event(c, bucket_alloc); - else if (!bch2_err_matches(PTR_ERR(ob), BCH_ERR_transaction_restart)) - count_event(c, bucket_alloc_fail); - - if (!IS_ERR(ob) - ? trace_bucket_alloc_enabled() - : trace_bucket_alloc_fail_enabled()) - trace_bucket_alloc2(c, ca, watermark, data_type, cl, usage, &s, ob); - - return ob; -} - -struct open_bucket *bch2_bucket_alloc(struct bch_fs *c, struct bch_dev *ca, - enum bch_watermark watermark, - enum bch_data_type data_type, - struct closure *cl) -{ - struct bch_dev_usage usage; - struct open_bucket *ob; - - bch2_trans_do(c, NULL, NULL, 0, - PTR_ERR_OR_ZERO(ob = bch2_bucket_alloc_trans(trans, ca, watermark, - data_type, cl, &usage))); - return ob; -} - -static int __dev_stripe_cmp(struct dev_stripe_state *stripe, - unsigned l, unsigned r) -{ - return ((stripe->next_alloc[l] > stripe->next_alloc[r]) - - (stripe->next_alloc[l] < stripe->next_alloc[r])); -} - -#define dev_stripe_cmp(l, r) __dev_stripe_cmp(stripe, l, r) - -struct dev_alloc_list bch2_dev_alloc_list(struct bch_fs *c, - struct dev_stripe_state *stripe, - struct bch_devs_mask *devs) -{ - struct dev_alloc_list ret = { .nr = 0 }; - unsigned i; - - for_each_set_bit(i, devs->d, BCH_SB_MEMBERS_MAX) - ret.devs[ret.nr++] = i; - - bubble_sort(ret.devs, ret.nr, dev_stripe_cmp); - return ret; -} - -static inline void bch2_dev_stripe_increment_inlined(struct bch_dev *ca, - struct dev_stripe_state *stripe, - struct bch_dev_usage *usage) -{ - u64 *v = stripe->next_alloc + ca->dev_idx; - u64 free_space = dev_buckets_available(ca, BCH_WATERMARK_normal); - u64 free_space_inv = free_space - ? div64_u64(1ULL << 48, free_space) - : 1ULL << 48; - u64 scale = *v / 4; - - if (*v + free_space_inv >= *v) - *v += free_space_inv; - else - *v = U64_MAX; - - for (v = stripe->next_alloc; - v < stripe->next_alloc + ARRAY_SIZE(stripe->next_alloc); v++) - *v = *v < scale ? 0 : *v - scale; -} - -void bch2_dev_stripe_increment(struct bch_dev *ca, - struct dev_stripe_state *stripe) -{ - struct bch_dev_usage usage; - - bch2_dev_usage_read_fast(ca, &usage); - bch2_dev_stripe_increment_inlined(ca, stripe, &usage); -} - -static int add_new_bucket(struct bch_fs *c, - struct open_buckets *ptrs, - struct bch_devs_mask *devs_may_alloc, - unsigned nr_replicas, - unsigned *nr_effective, - bool *have_cache, - unsigned flags, - struct open_bucket *ob) -{ - unsigned durability = ob_dev(c, ob)->mi.durability; - - BUG_ON(*nr_effective >= nr_replicas); - - __clear_bit(ob->dev, devs_may_alloc->d); - *nr_effective += durability; - *have_cache |= !durability; - - ob_push(c, ptrs, ob); - - if (*nr_effective >= nr_replicas) - return 1; - if (ob->ec) - return 1; - return 0; -} - -int bch2_bucket_alloc_set_trans(struct btree_trans *trans, - struct open_buckets *ptrs, - struct dev_stripe_state *stripe, - struct bch_devs_mask *devs_may_alloc, - unsigned nr_replicas, - unsigned *nr_effective, - bool *have_cache, - unsigned flags, - enum bch_data_type data_type, - enum bch_watermark watermark, - struct closure *cl) -{ - struct bch_fs *c = trans->c; - struct dev_alloc_list devs_sorted = - bch2_dev_alloc_list(c, stripe, devs_may_alloc); - int ret = -BCH_ERR_insufficient_devices; - - BUG_ON(*nr_effective >= nr_replicas); - - for (unsigned i = 0; i < devs_sorted.nr; i++) { - struct bch_dev_usage usage; - struct open_bucket *ob; - - unsigned dev = devs_sorted.devs[i]; - struct bch_dev *ca = bch2_dev_tryget_noerror(c, dev); - if (!ca) - continue; - - if (!ca->mi.durability && *have_cache) { - bch2_dev_put(ca); - continue; - } - - ob = bch2_bucket_alloc_trans(trans, ca, watermark, data_type, cl, &usage); - if (!IS_ERR(ob)) - bch2_dev_stripe_increment_inlined(ca, stripe, &usage); - bch2_dev_put(ca); - - if (IS_ERR(ob)) { - ret = PTR_ERR(ob); - if (bch2_err_matches(ret, BCH_ERR_transaction_restart) || cl) - break; - continue; - } - - if (add_new_bucket(c, ptrs, devs_may_alloc, - nr_replicas, nr_effective, - have_cache, flags, ob)) { - ret = 0; - break; - } - } - - return ret; -} - -/* Allocate from stripes: */ - -/* - * if we can't allocate a new stripe because there are already too many - * partially filled stripes, force allocating from an existing stripe even when - * it's to a device we don't want: - */ - -static int bucket_alloc_from_stripe(struct btree_trans *trans, - struct open_buckets *ptrs, - struct write_point *wp, - struct bch_devs_mask *devs_may_alloc, - u16 target, - unsigned nr_replicas, - unsigned *nr_effective, - bool *have_cache, - enum bch_watermark watermark, - unsigned flags, - struct closure *cl) -{ - struct bch_fs *c = trans->c; - struct dev_alloc_list devs_sorted; - struct ec_stripe_head *h; - struct open_bucket *ob; - unsigned i, ec_idx; - int ret = 0; - - if (nr_replicas < 2) - return 0; - - if (ec_open_bucket(c, ptrs)) - return 0; - - h = bch2_ec_stripe_head_get(trans, target, 0, nr_replicas - 1, watermark, cl); - if (IS_ERR(h)) - return PTR_ERR(h); - if (!h) - return 0; - - devs_sorted = bch2_dev_alloc_list(c, &wp->stripe, devs_may_alloc); - - for (i = 0; i < devs_sorted.nr; i++) - for (ec_idx = 0; ec_idx < h->s->nr_data; ec_idx++) { - if (!h->s->blocks[ec_idx]) - continue; - - ob = c->open_buckets + h->s->blocks[ec_idx]; - if (ob->dev == devs_sorted.devs[i] && - !test_and_set_bit(ec_idx, h->s->blocks_allocated)) - goto got_bucket; - } - goto out_put_head; -got_bucket: - ob->ec_idx = ec_idx; - ob->ec = h->s; - ec_stripe_new_get(h->s, STRIPE_REF_io); - - ret = add_new_bucket(c, ptrs, devs_may_alloc, - nr_replicas, nr_effective, - have_cache, flags, ob); -out_put_head: - bch2_ec_stripe_head_put(c, h); - return ret; -} - -/* Sector allocator */ - -static bool want_bucket(struct bch_fs *c, - struct write_point *wp, - struct bch_devs_mask *devs_may_alloc, - bool *have_cache, bool ec, - struct open_bucket *ob) -{ - struct bch_dev *ca = ob_dev(c, ob); - - if (!test_bit(ob->dev, devs_may_alloc->d)) - return false; - - if (ob->data_type != wp->data_type) - return false; - - if (!ca->mi.durability && - (wp->data_type == BCH_DATA_btree || ec || *have_cache)) - return false; - - if (ec != (ob->ec != NULL)) - return false; - - return true; -} - -static int bucket_alloc_set_writepoint(struct bch_fs *c, - struct open_buckets *ptrs, - struct write_point *wp, - struct bch_devs_mask *devs_may_alloc, - unsigned nr_replicas, - unsigned *nr_effective, - bool *have_cache, - bool ec, unsigned flags) -{ - struct open_buckets ptrs_skip = { .nr = 0 }; - struct open_bucket *ob; - unsigned i; - int ret = 0; - - open_bucket_for_each(c, &wp->ptrs, ob, i) { - if (!ret && want_bucket(c, wp, devs_may_alloc, - have_cache, ec, ob)) - ret = add_new_bucket(c, ptrs, devs_may_alloc, - nr_replicas, nr_effective, - have_cache, flags, ob); - else - ob_push(c, &ptrs_skip, ob); - } - wp->ptrs = ptrs_skip; - - return ret; -} - -static int bucket_alloc_set_partial(struct bch_fs *c, - struct open_buckets *ptrs, - struct write_point *wp, - struct bch_devs_mask *devs_may_alloc, - unsigned nr_replicas, - unsigned *nr_effective, - bool *have_cache, bool ec, - enum bch_watermark watermark, - unsigned flags) -{ - int i, ret = 0; - - if (!c->open_buckets_partial_nr) - return 0; - - spin_lock(&c->freelist_lock); - - if (!c->open_buckets_partial_nr) - goto unlock; - - for (i = c->open_buckets_partial_nr - 1; i >= 0; --i) { - struct open_bucket *ob = c->open_buckets + c->open_buckets_partial[i]; - - if (want_bucket(c, wp, devs_may_alloc, have_cache, ec, ob)) { - struct bch_dev *ca = ob_dev(c, ob); - struct bch_dev_usage usage; - u64 avail; - - bch2_dev_usage_read_fast(ca, &usage); - avail = dev_buckets_free(ca, usage, watermark); - if (!avail) - continue; - - array_remove_item(c->open_buckets_partial, - c->open_buckets_partial_nr, - i); - ob->on_partial_list = false; - - ret = add_new_bucket(c, ptrs, devs_may_alloc, - nr_replicas, nr_effective, - have_cache, flags, ob); - if (ret) - break; - } - } -unlock: - spin_unlock(&c->freelist_lock); - return ret; -} - -static int __open_bucket_add_buckets(struct btree_trans *trans, - struct open_buckets *ptrs, - struct write_point *wp, - struct bch_devs_list *devs_have, - u16 target, - bool erasure_code, - unsigned nr_replicas, - unsigned *nr_effective, - bool *have_cache, - enum bch_watermark watermark, - unsigned flags, - struct closure *_cl) -{ - struct bch_fs *c = trans->c; - struct bch_devs_mask devs; - struct open_bucket *ob; - struct closure *cl = NULL; - unsigned i; - int ret; - - devs = target_rw_devs(c, wp->data_type, target); - - /* Don't allocate from devices we already have pointers to: */ - darray_for_each(*devs_have, i) - __clear_bit(*i, devs.d); - - open_bucket_for_each(c, ptrs, ob, i) - __clear_bit(ob->dev, devs.d); - - if (erasure_code && ec_open_bucket(c, ptrs)) - return 0; - - ret = bucket_alloc_set_writepoint(c, ptrs, wp, &devs, - nr_replicas, nr_effective, - have_cache, erasure_code, flags); - if (ret) - return ret; - - ret = bucket_alloc_set_partial(c, ptrs, wp, &devs, - nr_replicas, nr_effective, - have_cache, erasure_code, watermark, flags); - if (ret) - return ret; - - if (erasure_code) { - ret = bucket_alloc_from_stripe(trans, ptrs, wp, &devs, - target, - nr_replicas, nr_effective, - have_cache, - watermark, flags, _cl); - } else { -retry_blocking: - /* - * Try nonblocking first, so that if one device is full we'll try from - * other devices: - */ - ret = bch2_bucket_alloc_set_trans(trans, ptrs, &wp->stripe, &devs, - nr_replicas, nr_effective, have_cache, - flags, wp->data_type, watermark, cl); - if (ret && - !bch2_err_matches(ret, BCH_ERR_transaction_restart) && - !bch2_err_matches(ret, BCH_ERR_insufficient_devices) && - !cl && _cl) { - cl = _cl; - goto retry_blocking; - } - } - - return ret; -} - -static int open_bucket_add_buckets(struct btree_trans *trans, - struct open_buckets *ptrs, - struct write_point *wp, - struct bch_devs_list *devs_have, - u16 target, - unsigned erasure_code, - unsigned nr_replicas, - unsigned *nr_effective, - bool *have_cache, - enum bch_watermark watermark, - unsigned flags, - struct closure *cl) -{ - int ret; - - if (erasure_code) { - ret = __open_bucket_add_buckets(trans, ptrs, wp, - devs_have, target, erasure_code, - nr_replicas, nr_effective, have_cache, - watermark, flags, cl); - if (bch2_err_matches(ret, BCH_ERR_transaction_restart) || - bch2_err_matches(ret, BCH_ERR_operation_blocked) || - bch2_err_matches(ret, BCH_ERR_freelist_empty) || - bch2_err_matches(ret, BCH_ERR_open_buckets_empty)) - return ret; - if (*nr_effective >= nr_replicas) - return 0; - } - - ret = __open_bucket_add_buckets(trans, ptrs, wp, - devs_have, target, false, - nr_replicas, nr_effective, have_cache, - watermark, flags, cl); - return ret < 0 ? ret : 0; -} - -/** - * should_drop_bucket - check if this is open_bucket should go away - * @ob: open_bucket to predicate on - * @c: filesystem handle - * @ca: if set, we're killing buckets for a particular device - * @ec: if true, we're shutting down erasure coding and killing all ec - * open_buckets - * otherwise, return true - * Returns: true if we should kill this open_bucket - * - * We're killing open_buckets because we're shutting down a device, erasure - * coding, or the entire filesystem - check if this open_bucket matches: - */ -static bool should_drop_bucket(struct open_bucket *ob, struct bch_fs *c, - struct bch_dev *ca, bool ec) -{ - if (ec) { - return ob->ec != NULL; - } else if (ca) { - bool drop = ob->dev == ca->dev_idx; - struct open_bucket *ob2; - unsigned i; - - if (!drop && ob->ec) { - unsigned nr_blocks; - - mutex_lock(&ob->ec->lock); - nr_blocks = bkey_i_to_stripe(&ob->ec->new_stripe.key)->v.nr_blocks; - - for (i = 0; i < nr_blocks; i++) { - if (!ob->ec->blocks[i]) - continue; - - ob2 = c->open_buckets + ob->ec->blocks[i]; - drop |= ob2->dev == ca->dev_idx; - } - mutex_unlock(&ob->ec->lock); - } - - return drop; - } else { - return true; - } -} - -static void bch2_writepoint_stop(struct bch_fs *c, struct bch_dev *ca, - bool ec, struct write_point *wp) -{ - struct open_buckets ptrs = { .nr = 0 }; - struct open_bucket *ob; - unsigned i; - - mutex_lock(&wp->lock); - open_bucket_for_each(c, &wp->ptrs, ob, i) - if (should_drop_bucket(ob, c, ca, ec)) - bch2_open_bucket_put(c, ob); - else - ob_push(c, &ptrs, ob); - wp->ptrs = ptrs; - mutex_unlock(&wp->lock); -} - -void bch2_open_buckets_stop(struct bch_fs *c, struct bch_dev *ca, - bool ec) -{ - unsigned i; - - /* Next, close write points that point to this device... */ - for (i = 0; i < ARRAY_SIZE(c->write_points); i++) - bch2_writepoint_stop(c, ca, ec, &c->write_points[i]); - - bch2_writepoint_stop(c, ca, ec, &c->copygc_write_point); - bch2_writepoint_stop(c, ca, ec, &c->rebalance_write_point); - bch2_writepoint_stop(c, ca, ec, &c->btree_write_point); - - mutex_lock(&c->btree_reserve_cache_lock); - while (c->btree_reserve_cache_nr) { - struct btree_alloc *a = - &c->btree_reserve_cache[--c->btree_reserve_cache_nr]; - - bch2_open_buckets_put(c, &a->ob); - } - mutex_unlock(&c->btree_reserve_cache_lock); - - spin_lock(&c->freelist_lock); - i = 0; - while (i < c->open_buckets_partial_nr) { - struct open_bucket *ob = - c->open_buckets + c->open_buckets_partial[i]; - - if (should_drop_bucket(ob, c, ca, ec)) { - --c->open_buckets_partial_nr; - swap(c->open_buckets_partial[i], - c->open_buckets_partial[c->open_buckets_partial_nr]); - ob->on_partial_list = false; - spin_unlock(&c->freelist_lock); - bch2_open_bucket_put(c, ob); - spin_lock(&c->freelist_lock); - } else { - i++; - } - } - spin_unlock(&c->freelist_lock); - - bch2_ec_stop_dev(c, ca); -} - -static inline struct hlist_head *writepoint_hash(struct bch_fs *c, - unsigned long write_point) -{ - unsigned hash = - hash_long(write_point, ilog2(ARRAY_SIZE(c->write_points_hash))); - - return &c->write_points_hash[hash]; -} - -static struct write_point *__writepoint_find(struct hlist_head *head, - unsigned long write_point) -{ - struct write_point *wp; - - rcu_read_lock(); - hlist_for_each_entry_rcu(wp, head, node) - if (wp->write_point == write_point) - goto out; - wp = NULL; -out: - rcu_read_unlock(); - return wp; -} - -static inline bool too_many_writepoints(struct bch_fs *c, unsigned factor) -{ - u64 stranded = c->write_points_nr * c->bucket_size_max; - u64 free = bch2_fs_usage_read_short(c).free; - - return stranded * factor > free; -} - -static bool try_increase_writepoints(struct bch_fs *c) -{ - struct write_point *wp; - - if (c->write_points_nr == ARRAY_SIZE(c->write_points) || - too_many_writepoints(c, 32)) - return false; - - wp = c->write_points + c->write_points_nr++; - hlist_add_head_rcu(&wp->node, writepoint_hash(c, wp->write_point)); - return true; -} - -static bool try_decrease_writepoints(struct btree_trans *trans, unsigned old_nr) -{ - struct bch_fs *c = trans->c; - struct write_point *wp; - struct open_bucket *ob; - unsigned i; - - mutex_lock(&c->write_points_hash_lock); - if (c->write_points_nr < old_nr) { - mutex_unlock(&c->write_points_hash_lock); - return true; - } - - if (c->write_points_nr == 1 || - !too_many_writepoints(c, 8)) { - mutex_unlock(&c->write_points_hash_lock); - return false; - } - - wp = c->write_points + --c->write_points_nr; - - hlist_del_rcu(&wp->node); - mutex_unlock(&c->write_points_hash_lock); - - bch2_trans_mutex_lock_norelock(trans, &wp->lock); - open_bucket_for_each(c, &wp->ptrs, ob, i) - open_bucket_free_unused(c, ob); - wp->ptrs.nr = 0; - mutex_unlock(&wp->lock); - return true; -} - -static struct write_point *writepoint_find(struct btree_trans *trans, - unsigned long write_point) -{ - struct bch_fs *c = trans->c; - struct write_point *wp, *oldest; - struct hlist_head *head; - - if (!(write_point & 1UL)) { - wp = (struct write_point *) write_point; - bch2_trans_mutex_lock_norelock(trans, &wp->lock); - return wp; - } - - head = writepoint_hash(c, write_point); -restart_find: - wp = __writepoint_find(head, write_point); - if (wp) { -lock_wp: - bch2_trans_mutex_lock_norelock(trans, &wp->lock); - if (wp->write_point == write_point) - goto out; - mutex_unlock(&wp->lock); - goto restart_find; - } -restart_find_oldest: - oldest = NULL; - for (wp = c->write_points; - wp < c->write_points + c->write_points_nr; wp++) - if (!oldest || time_before64(wp->last_used, oldest->last_used)) - oldest = wp; - - bch2_trans_mutex_lock_norelock(trans, &oldest->lock); - bch2_trans_mutex_lock_norelock(trans, &c->write_points_hash_lock); - if (oldest >= c->write_points + c->write_points_nr || - try_increase_writepoints(c)) { - mutex_unlock(&c->write_points_hash_lock); - mutex_unlock(&oldest->lock); - goto restart_find_oldest; - } - - wp = __writepoint_find(head, write_point); - if (wp && wp != oldest) { - mutex_unlock(&c->write_points_hash_lock); - mutex_unlock(&oldest->lock); - goto lock_wp; - } - - wp = oldest; - hlist_del_rcu(&wp->node); - wp->write_point = write_point; - hlist_add_head_rcu(&wp->node, head); - mutex_unlock(&c->write_points_hash_lock); -out: - wp->last_used = local_clock(); - return wp; -} - -static noinline void -deallocate_extra_replicas(struct bch_fs *c, - struct open_buckets *ptrs, - struct open_buckets *ptrs_no_use, - unsigned extra_replicas) -{ - struct open_buckets ptrs2 = { 0 }; - struct open_bucket *ob; - unsigned i; - - open_bucket_for_each(c, ptrs, ob, i) { - unsigned d = ob_dev(c, ob)->mi.durability; - - if (d && d <= extra_replicas) { - extra_replicas -= d; - ob_push(c, ptrs_no_use, ob); - } else { - ob_push(c, &ptrs2, ob); - } - } - - *ptrs = ptrs2; -} - -/* - * Get us an open_bucket we can allocate from, return with it locked: - */ -int bch2_alloc_sectors_start_trans(struct btree_trans *trans, - unsigned target, - unsigned erasure_code, - struct write_point_specifier write_point, - struct bch_devs_list *devs_have, - unsigned nr_replicas, - unsigned nr_replicas_required, - enum bch_watermark watermark, - unsigned flags, - struct closure *cl, - struct write_point **wp_ret) -{ - struct bch_fs *c = trans->c; - struct write_point *wp; - struct open_bucket *ob; - struct open_buckets ptrs; - unsigned nr_effective, write_points_nr; - bool have_cache; - int ret; - int i; - - if (!IS_ENABLED(CONFIG_BCACHEFS_ERASURE_CODING)) - erasure_code = false; - - BUG_ON(flags & BCH_WRITE_ONLY_SPECIFIED_DEVS); - - BUG_ON(!nr_replicas || !nr_replicas_required); -retry: - ptrs.nr = 0; - nr_effective = 0; - write_points_nr = c->write_points_nr; - have_cache = false; - - *wp_ret = wp = writepoint_find(trans, write_point.v); - - ret = bch2_trans_relock(trans); - if (ret) - goto err; - - /* metadata may not allocate on cache devices: */ - if (wp->data_type != BCH_DATA_user) - have_cache = true; - - if (target && !(flags & BCH_WRITE_ONLY_SPECIFIED_DEVS)) { - ret = open_bucket_add_buckets(trans, &ptrs, wp, devs_have, - target, erasure_code, - nr_replicas, &nr_effective, - &have_cache, watermark, - flags, NULL); - if (!ret || - bch2_err_matches(ret, BCH_ERR_transaction_restart)) - goto alloc_done; - - /* Don't retry from all devices if we're out of open buckets: */ - if (bch2_err_matches(ret, BCH_ERR_open_buckets_empty)) { - int ret2 = open_bucket_add_buckets(trans, &ptrs, wp, devs_have, - target, erasure_code, - nr_replicas, &nr_effective, - &have_cache, watermark, - flags, cl); - if (!ret2 || - bch2_err_matches(ret2, BCH_ERR_transaction_restart) || - bch2_err_matches(ret2, BCH_ERR_open_buckets_empty)) { - ret = ret2; - goto alloc_done; - } - } - - /* - * Only try to allocate cache (durability = 0 devices) from the - * specified target: - */ - have_cache = true; - - ret = open_bucket_add_buckets(trans, &ptrs, wp, devs_have, - 0, erasure_code, - nr_replicas, &nr_effective, - &have_cache, watermark, - flags, cl); - } else { - ret = open_bucket_add_buckets(trans, &ptrs, wp, devs_have, - target, erasure_code, - nr_replicas, &nr_effective, - &have_cache, watermark, - flags, cl); - } -alloc_done: - BUG_ON(!ret && nr_effective < nr_replicas); - - if (erasure_code && !ec_open_bucket(c, &ptrs)) - pr_debug("failed to get ec bucket: ret %u", ret); - - if (ret == -BCH_ERR_insufficient_devices && - nr_effective >= nr_replicas_required) - ret = 0; - - if (ret) - goto err; - - if (nr_effective > nr_replicas) - deallocate_extra_replicas(c, &ptrs, &wp->ptrs, nr_effective - nr_replicas); - - /* Free buckets we didn't use: */ - open_bucket_for_each(c, &wp->ptrs, ob, i) - open_bucket_free_unused(c, ob); - - wp->ptrs = ptrs; - - wp->sectors_free = UINT_MAX; - - open_bucket_for_each(c, &wp->ptrs, ob, i) - wp->sectors_free = min(wp->sectors_free, ob->sectors_free); - - BUG_ON(!wp->sectors_free || wp->sectors_free == UINT_MAX); - - return 0; -err: - open_bucket_for_each(c, &wp->ptrs, ob, i) - if (ptrs.nr < ARRAY_SIZE(ptrs.v)) - ob_push(c, &ptrs, ob); - else - open_bucket_free_unused(c, ob); - wp->ptrs = ptrs; - - mutex_unlock(&wp->lock); - - if (bch2_err_matches(ret, BCH_ERR_freelist_empty) && - try_decrease_writepoints(trans, write_points_nr)) - goto retry; - - if (bch2_err_matches(ret, BCH_ERR_open_buckets_empty) || - bch2_err_matches(ret, BCH_ERR_freelist_empty)) - return cl - ? -BCH_ERR_bucket_alloc_blocked - : -BCH_ERR_ENOSPC_bucket_alloc; - - return ret; -} - -struct bch_extent_ptr bch2_ob_ptr(struct bch_fs *c, struct open_bucket *ob) -{ - struct bch_dev *ca = ob_dev(c, ob); - - return (struct bch_extent_ptr) { - .type = 1 << BCH_EXTENT_ENTRY_ptr, - .gen = ob->gen, - .dev = ob->dev, - .offset = bucket_to_sector(ca, ob->bucket) + - ca->mi.bucket_size - - ob->sectors_free, - }; -} - -void bch2_alloc_sectors_append_ptrs(struct bch_fs *c, struct write_point *wp, - struct bkey_i *k, unsigned sectors, - bool cached) -{ - bch2_alloc_sectors_append_ptrs_inlined(c, wp, k, sectors, cached); -} - -/* - * Append pointers to the space we just allocated to @k, and mark @sectors space - * as allocated out of @ob - */ -void bch2_alloc_sectors_done(struct bch_fs *c, struct write_point *wp) -{ - bch2_alloc_sectors_done_inlined(c, wp); -} - -static inline void writepoint_init(struct write_point *wp, - enum bch_data_type type) -{ - mutex_init(&wp->lock); - wp->data_type = type; - - INIT_WORK(&wp->index_update_work, bch2_write_point_do_index_updates); - INIT_LIST_HEAD(&wp->writes); - spin_lock_init(&wp->writes_lock); -} - -void bch2_fs_allocator_foreground_init(struct bch_fs *c) -{ - struct open_bucket *ob; - struct write_point *wp; - - mutex_init(&c->write_points_hash_lock); - c->write_points_nr = ARRAY_SIZE(c->write_points); - - /* open bucket 0 is a sentinal NULL: */ - spin_lock_init(&c->open_buckets[0].lock); - - for (ob = c->open_buckets + 1; - ob < c->open_buckets + ARRAY_SIZE(c->open_buckets); ob++) { - spin_lock_init(&ob->lock); - c->open_buckets_nr_free++; - - ob->freelist = c->open_buckets_freelist; - c->open_buckets_freelist = ob - c->open_buckets; - } - - writepoint_init(&c->btree_write_point, BCH_DATA_btree); - writepoint_init(&c->rebalance_write_point, BCH_DATA_user); - writepoint_init(&c->copygc_write_point, BCH_DATA_user); - - for (wp = c->write_points; - wp < c->write_points + c->write_points_nr; wp++) { - writepoint_init(wp, BCH_DATA_user); - - wp->last_used = local_clock(); - wp->write_point = (unsigned long) wp; - hlist_add_head_rcu(&wp->node, - writepoint_hash(c, wp->write_point)); - } -} - -static void bch2_open_bucket_to_text(struct printbuf *out, struct bch_fs *c, struct open_bucket *ob) -{ - struct bch_dev *ca = ob_dev(c, ob); - unsigned data_type = ob->data_type; - barrier(); /* READ_ONCE() doesn't work on bitfields */ - - prt_printf(out, "%zu ref %u ", - ob - c->open_buckets, - atomic_read(&ob->pin)); - bch2_prt_data_type(out, data_type); - prt_printf(out, " %u:%llu gen %u allocated %u/%u", - ob->dev, ob->bucket, ob->gen, - ca->mi.bucket_size - ob->sectors_free, ca->mi.bucket_size); - if (ob->ec) - prt_printf(out, " ec idx %llu", ob->ec->idx); - if (ob->on_partial_list) - prt_str(out, " partial"); - prt_newline(out); -} - -void bch2_open_buckets_to_text(struct printbuf *out, struct bch_fs *c) -{ - struct open_bucket *ob; - - out->atomic++; - - for (ob = c->open_buckets; - ob < c->open_buckets + ARRAY_SIZE(c->open_buckets); - ob++) { - spin_lock(&ob->lock); - if (ob->valid && !ob->on_partial_list) - bch2_open_bucket_to_text(out, c, ob); - spin_unlock(&ob->lock); - } - - --out->atomic; -} - -void bch2_open_buckets_partial_to_text(struct printbuf *out, struct bch_fs *c) -{ - unsigned i; - - out->atomic++; - spin_lock(&c->freelist_lock); - - for (i = 0; i < c->open_buckets_partial_nr; i++) - bch2_open_bucket_to_text(out, c, - c->open_buckets + c->open_buckets_partial[i]); - - spin_unlock(&c->freelist_lock); - --out->atomic; -} - -static const char * const bch2_write_point_states[] = { -#define x(n) #n, - WRITE_POINT_STATES() -#undef x - NULL -}; - -static void bch2_write_point_to_text(struct printbuf *out, struct bch_fs *c, - struct write_point *wp) -{ - struct open_bucket *ob; - unsigned i; - - prt_printf(out, "%lu: ", wp->write_point); - prt_human_readable_u64(out, wp->sectors_allocated); - - prt_printf(out, " last wrote: "); - bch2_pr_time_units(out, sched_clock() - wp->last_used); - - for (i = 0; i < WRITE_POINT_STATE_NR; i++) { - prt_printf(out, " %s: ", bch2_write_point_states[i]); - bch2_pr_time_units(out, wp->time[i]); - } - - prt_newline(out); - - printbuf_indent_add(out, 2); - open_bucket_for_each(c, &wp->ptrs, ob, i) - bch2_open_bucket_to_text(out, c, ob); - printbuf_indent_sub(out, 2); -} - -void bch2_write_points_to_text(struct printbuf *out, struct bch_fs *c) -{ - struct write_point *wp; - - prt_str(out, "Foreground write points\n"); - for (wp = c->write_points; - wp < c->write_points + ARRAY_SIZE(c->write_points); - wp++) - bch2_write_point_to_text(out, c, wp); - - prt_str(out, "Copygc write point\n"); - bch2_write_point_to_text(out, c, &c->copygc_write_point); - - prt_str(out, "Rebalance write point\n"); - bch2_write_point_to_text(out, c, &c->rebalance_write_point); - - prt_str(out, "Btree write point\n"); - bch2_write_point_to_text(out, c, &c->btree_write_point); -} - -void bch2_fs_alloc_debug_to_text(struct printbuf *out, struct bch_fs *c) -{ - unsigned nr[BCH_DATA_NR]; - - memset(nr, 0, sizeof(nr)); - - for (unsigned i = 0; i < ARRAY_SIZE(c->open_buckets); i++) - nr[c->open_buckets[i].data_type]++; - - printbuf_tabstops_reset(out); - printbuf_tabstop_push(out, 24); - - percpu_down_read(&c->mark_lock); - prt_printf(out, "hidden\t%llu\n", bch2_fs_usage_read_one(c, &c->usage_base->b.hidden)); - prt_printf(out, "btree\t%llu\n", bch2_fs_usage_read_one(c, &c->usage_base->b.btree)); - prt_printf(out, "data\t%llu\n", bch2_fs_usage_read_one(c, &c->usage_base->b.data)); - prt_printf(out, "cached\t%llu\n", bch2_fs_usage_read_one(c, &c->usage_base->b.cached)); - prt_printf(out, "reserved\t%llu\n", bch2_fs_usage_read_one(c, &c->usage_base->b.reserved)); - prt_printf(out, "online_reserved\t%llu\n", percpu_u64_get(c->online_reserved)); - prt_printf(out, "nr_inodes\t%llu\n", bch2_fs_usage_read_one(c, &c->usage_base->b.nr_inodes)); - percpu_up_read(&c->mark_lock); - - prt_newline(out); - prt_printf(out, "freelist_wait\t%s\n", c->freelist_wait.list.first ? "waiting" : "empty"); - prt_printf(out, "open buckets allocated\t%i\n", OPEN_BUCKETS_COUNT - c->open_buckets_nr_free); - prt_printf(out, "open buckets total\t%u\n", OPEN_BUCKETS_COUNT); - prt_printf(out, "open_buckets_wait\t%s\n", c->open_buckets_wait.list.first ? "waiting" : "empty"); - prt_printf(out, "open_buckets_btree\t%u\n", nr[BCH_DATA_btree]); - prt_printf(out, "open_buckets_user\t%u\n", nr[BCH_DATA_user]); - prt_printf(out, "btree reserve cache\t%u\n", c->btree_reserve_cache_nr); -} - -void bch2_dev_alloc_debug_to_text(struct printbuf *out, struct bch_dev *ca) -{ - struct bch_fs *c = ca->fs; - struct bch_dev_usage stats = bch2_dev_usage_read(ca); - unsigned nr[BCH_DATA_NR]; - - memset(nr, 0, sizeof(nr)); - - for (unsigned i = 0; i < ARRAY_SIZE(c->open_buckets); i++) - nr[c->open_buckets[i].data_type]++; - - printbuf_tabstops_reset(out); - printbuf_tabstop_push(out, 12); - printbuf_tabstop_push(out, 16); - printbuf_tabstop_push(out, 16); - printbuf_tabstop_push(out, 16); - printbuf_tabstop_push(out, 16); - - bch2_dev_usage_to_text(out, &stats); - - prt_newline(out); - - prt_printf(out, "reserves:\n"); - for (unsigned i = 0; i < BCH_WATERMARK_NR; i++) - prt_printf(out, "%s\t%llu\r\n", bch2_watermarks[i], bch2_dev_buckets_reserved(ca, i)); - - prt_newline(out); - - printbuf_tabstops_reset(out); - printbuf_tabstop_push(out, 12); - printbuf_tabstop_push(out, 16); - - prt_printf(out, "open buckets\t%i\r\n", ca->nr_open_buckets); - prt_printf(out, "buckets to invalidate\t%llu\r\n", should_invalidate_buckets(ca, stats)); -} - -void bch2_print_allocator_stuck(struct bch_fs *c) -{ - struct printbuf buf = PRINTBUF; - - prt_printf(&buf, "Allocator stuck? Waited for 10 seconds\n"); - - prt_printf(&buf, "Allocator debug:\n"); - printbuf_indent_add(&buf, 2); - bch2_fs_alloc_debug_to_text(&buf, c); - printbuf_indent_sub(&buf, 2); - prt_newline(&buf); - - for_each_online_member(c, ca) { - prt_printf(&buf, "Dev %u:\n", ca->dev_idx); - printbuf_indent_add(&buf, 2); - bch2_dev_alloc_debug_to_text(&buf, ca); - printbuf_indent_sub(&buf, 2); - prt_newline(&buf); - } - - prt_printf(&buf, "Copygc debug:\n"); - printbuf_indent_add(&buf, 2); - bch2_copygc_wait_to_text(&buf, c); - printbuf_indent_sub(&buf, 2); - prt_newline(&buf); - - prt_printf(&buf, "Journal debug:\n"); - printbuf_indent_add(&buf, 2); - bch2_journal_debug_to_text(&buf, &c->journal); - printbuf_indent_sub(&buf, 2); - - bch2_print_string_as_lines(KERN_ERR, buf.buf); - printbuf_exit(&buf); -} |