1 files changed, 0 insertions, 918 deletions

diff --git a/fs/bcachefs/replicas.c b/fs/bcachefs/replicas.c
deleted file mode 100644
index 8383bd7fdb3f..000000000000
--- a/fs/bcachefs/replicas.c
+++ /dev/null
@@ -1,918 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include "bcachefs.h"
-#include "buckets.h"
-#include "disk_accounting.h"
-#include "journal.h"
-#include "replicas.h"
-#include "super-io.h"
-
-#include <linux/sort.h>
-
-static int bch2_cpu_replicas_to_sb_replicas(struct bch_fs *,
-					    struct bch_replicas_cpu *);
-
-/* Some (buggy!) compilers don't allow memcmp to be passed as a pointer */
-static int bch2_memcmp(const void *l, const void *r,  const void *priv)
-{
-	size_t size = (size_t) priv;
-	return memcmp(l, r, size);
-}
-
-/* Replicas tracking - in memory: */
-
-static void verify_replicas_entry(struct bch_replicas_entry_v1 *e)
-{
-#ifdef CONFIG_BCACHEFS_DEBUG
-	BUG_ON(!e->nr_devs);
-	BUG_ON(e->nr_required > 1 &&
-	       e->nr_required >= e->nr_devs);
-
-	for (unsigned i = 0; i + 1 < e->nr_devs; i++)
-		BUG_ON(e->devs[i] >= e->devs[i + 1]);
-#endif
-}
-
-void bch2_replicas_entry_sort(struct bch_replicas_entry_v1 *e)
-{
-	bubble_sort(e->devs, e->nr_devs, u8_cmp);
-}
-
-static void bch2_cpu_replicas_sort(struct bch_replicas_cpu *r)
-{
-	eytzinger0_sort_r(r->entries, r->nr, r->entry_size,
-			  bch2_memcmp, NULL, (void *)(size_t)r->entry_size);
-}
-
-static void bch2_replicas_entry_v0_to_text(struct printbuf *out,
-					   struct bch_replicas_entry_v0 *e)
-{
-	bch2_prt_data_type(out, e->data_type);
-
-	prt_printf(out, ": %u [", e->nr_devs);
-	for (unsigned i = 0; i < e->nr_devs; i++)
-		prt_printf(out, i ? " %u" : "%u", e->devs[i]);
-	prt_printf(out, "]");
-}
-
-void bch2_replicas_entry_to_text(struct printbuf *out,
-				 struct bch_replicas_entry_v1 *e)
-{
-	bch2_prt_data_type(out, e->data_type);
-
-	prt_printf(out, ": %u/%u [", e->nr_required, e->nr_devs);
-	for (unsigned i = 0; i < e->nr_devs; i++)
-		prt_printf(out, i ? " %u" : "%u", e->devs[i]);
-	prt_printf(out, "]");
-}
-
-static int bch2_replicas_entry_sb_validate(struct bch_replicas_entry_v1 *r,
-					   struct bch_sb *sb,
-					   struct printbuf *err)
-{
-	if (!r->nr_devs) {
-		prt_printf(err, "no devices in entry ");
-		goto bad;
-	}
-
-	if (r->nr_required > 1 &&
-	    r->nr_required >= r->nr_devs) {
-		prt_printf(err, "bad nr_required in entry ");
-		goto bad;
-	}
-
-	for (unsigned i = 0; i < r->nr_devs; i++)
-		if (r->devs[i] != BCH_SB_MEMBER_INVALID &&
-		    !bch2_member_exists(sb, r->devs[i])) {
-			prt_printf(err, "invalid device %u in entry ", r->devs[i]);
-			goto bad;
-		}
-
-	return 0;
-bad:
-	bch2_replicas_entry_to_text(err, r);
-	return -BCH_ERR_invalid_replicas_entry;
-}
-
-int bch2_replicas_entry_validate(struct bch_replicas_entry_v1 *r,
-				 struct bch_fs *c,
-				 struct printbuf *err)
-{
-	if (!r->nr_devs) {
-		prt_printf(err, "no devices in entry ");
-		goto bad;
-	}
-
-	if (r->nr_required > 1 &&
-	    r->nr_required >= r->nr_devs) {
-		prt_printf(err, "bad nr_required in entry ");
-		goto bad;
-	}
-
-	for (unsigned i = 0; i < r->nr_devs; i++)
-		if (r->devs[i] != BCH_SB_MEMBER_INVALID &&
-		    !bch2_dev_exists(c, r->devs[i])) {
-			prt_printf(err, "invalid device %u in entry ", r->devs[i]);
-			goto bad;
-		}
-
-	return 0;
-bad:
-	bch2_replicas_entry_to_text(err, r);
-	return bch_err_throw(c, invalid_replicas_entry);
-}
-
-void bch2_cpu_replicas_to_text(struct printbuf *out,
-			       struct bch_replicas_cpu *r)
-{
-	struct bch_replicas_entry_v1 *e;
-	bool first = true;
-
-	for_each_cpu_replicas_entry(r, e) {
-		if (!first)
-			prt_printf(out, " ");
-		first = false;
-
-		bch2_replicas_entry_to_text(out, e);
-	}
-}
-
-static void extent_to_replicas(struct bkey_s_c k,
-			       struct bch_replicas_entry_v1 *r)
-{
-	struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
-	const union bch_extent_entry *entry;
-	struct extent_ptr_decoded p;
-
-	r->nr_required	= 1;
-
-	bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
-		if (p.ptr.cached)
-			continue;
-
-		if (!p.has_ec)
-			replicas_entry_add_dev(r, p.ptr.dev);
-		else
-			r->nr_required = 0;
-	}
-}
-
-static void stripe_to_replicas(struct bkey_s_c k,
-			       struct bch_replicas_entry_v1 *r)
-{
-	struct bkey_s_c_stripe s = bkey_s_c_to_stripe(k);
-	const struct bch_extent_ptr *ptr;
-
-	r->nr_required	= s.v->nr_blocks - s.v->nr_redundant;
-
-	for (ptr = s.v->ptrs;
-	     ptr < s.v->ptrs + s.v->nr_blocks;
-	     ptr++)
-		replicas_entry_add_dev(r, ptr->dev);
-}
-
-void bch2_bkey_to_replicas(struct bch_replicas_entry_v1 *e,
-			   struct bkey_s_c k)
-{
-	e->nr_devs = 0;
-
-	switch (k.k->type) {
-	case KEY_TYPE_btree_ptr:
-	case KEY_TYPE_btree_ptr_v2:
-		e->data_type = BCH_DATA_btree;
-		extent_to_replicas(k, e);
-		break;
-	case KEY_TYPE_extent:
-	case KEY_TYPE_reflink_v:
-		e->data_type = BCH_DATA_user;
-		extent_to_replicas(k, e);
-		break;
-	case KEY_TYPE_stripe:
-		e->data_type = BCH_DATA_parity;
-		stripe_to_replicas(k, e);
-		break;
-	}
-
-	bch2_replicas_entry_sort(e);
-}
-
-void bch2_devlist_to_replicas(struct bch_replicas_entry_v1 *e,
-			      enum bch_data_type data_type,
-			      struct bch_devs_list devs)
-{
-	BUG_ON(!data_type ||
-	       data_type == BCH_DATA_sb ||
-	       data_type >= BCH_DATA_NR);
-
-	e->data_type	= data_type;
-	e->nr_devs	= 0;
-	e->nr_required	= 1;
-
-	darray_for_each(devs, i)
-		replicas_entry_add_dev(e, *i);
-
-	bch2_replicas_entry_sort(e);
-}
-
-static struct bch_replicas_cpu
-cpu_replicas_add_entry(struct bch_fs *c,
-		       struct bch_replicas_cpu *old,
-		       struct bch_replicas_entry_v1 *new_entry)
-{
-	struct bch_replicas_cpu new = {
-		.nr		= old->nr + 1,
-		.entry_size	= max_t(unsigned, old->entry_size,
-					replicas_entry_bytes(new_entry)),
-	};
-
-	new.entries = kcalloc(new.nr, new.entry_size, GFP_KERNEL);
-	if (!new.entries)
-		return new;
-
-	for (unsigned i = 0; i < old->nr; i++)
-		memcpy(cpu_replicas_entry(&new, i),
-		       cpu_replicas_entry(old, i),
-		       old->entry_size);
-
-	memcpy(cpu_replicas_entry(&new, old->nr),
-	       new_entry,
-	       replicas_entry_bytes(new_entry));
-
-	bch2_cpu_replicas_sort(&new);
-	return new;
-}
-
-static inline int __replicas_entry_idx(struct bch_replicas_cpu *r,
-				       struct bch_replicas_entry_v1 *search)
-{
-	int idx, entry_size = replicas_entry_bytes(search);
-
-	if (unlikely(entry_size > r->entry_size))
-		return -1;
-
-#define entry_cmp(_l, _r)	memcmp(_l, _r, entry_size)
-	idx = eytzinger0_find(r->entries, r->nr, r->entry_size,
-			      entry_cmp, search);
-#undef entry_cmp
-
-	return idx < r->nr ? idx : -1;
-}
-
-int bch2_replicas_entry_idx(struct bch_fs *c,
-			    struct bch_replicas_entry_v1 *search)
-{
-	bch2_replicas_entry_sort(search);
-
-	return __replicas_entry_idx(&c->replicas, search);
-}
-
-static bool __replicas_has_entry(struct bch_replicas_cpu *r,
-				 struct bch_replicas_entry_v1 *search)
-{
-	return __replicas_entry_idx(r, search) >= 0;
-}
-
-bool bch2_replicas_marked_locked(struct bch_fs *c,
-			  struct bch_replicas_entry_v1 *search)
-{
-	verify_replicas_entry(search);
-
-	return !search->nr_devs ||
-		(__replicas_has_entry(&c->replicas, search) &&
-		 (likely((!c->replicas_gc.entries)) ||
-		  __replicas_has_entry(&c->replicas_gc, search)));
-}
-
-bool bch2_replicas_marked(struct bch_fs *c,
-			  struct bch_replicas_entry_v1 *search)
-{
-	percpu_down_read(&c->mark_lock);
-	bool ret = bch2_replicas_marked_locked(c, search);
-	percpu_up_read(&c->mark_lock);
-
-	return ret;
-}
-
-noinline
-static int bch2_mark_replicas_slowpath(struct bch_fs *c,
-				struct bch_replicas_entry_v1 *new_entry)
-{
-	struct bch_replicas_cpu new_r, new_gc;
-	int ret = 0;
-
-	verify_replicas_entry(new_entry);
-
-	memset(&new_r, 0, sizeof(new_r));
-	memset(&new_gc, 0, sizeof(new_gc));
-
-	mutex_lock(&c->sb_lock);
-
-	if (c->replicas_gc.entries &&
-	    !__replicas_has_entry(&c->replicas_gc, new_entry)) {
-		new_gc = cpu_replicas_add_entry(c, &c->replicas_gc, new_entry);
-		if (!new_gc.entries) {
-			ret = bch_err_throw(c, ENOMEM_cpu_replicas);
-			goto err;
-		}
-	}
-
-	if (!__replicas_has_entry(&c->replicas, new_entry)) {
-		new_r = cpu_replicas_add_entry(c, &c->replicas, new_entry);
-		if (!new_r.entries) {
-			ret = bch_err_throw(c, ENOMEM_cpu_replicas);
-			goto err;
-		}
-
-		ret = bch2_cpu_replicas_to_sb_replicas(c, &new_r);
-		if (ret)
-			goto err;
-	}
-
-	if (!new_r.entries &&
-	    !new_gc.entries)
-		goto out;
-
-	/* allocations done, now commit: */
-
-	if (new_r.entries)
-		bch2_write_super(c);
-
-	/* don't update in memory replicas until changes are persistent */
-	percpu_down_write(&c->mark_lock);
-	if (new_r.entries)
-		swap(c->replicas, new_r);
-	if (new_gc.entries)
-		swap(new_gc, c->replicas_gc);
-	percpu_up_write(&c->mark_lock);
-out:
-	mutex_unlock(&c->sb_lock);
-
-	kfree(new_r.entries);
-	kfree(new_gc.entries);
-
-	return ret;
-err:
-	bch_err_msg(c, ret, "adding replicas entry");
-	goto out;
-}
-
-int bch2_mark_replicas(struct bch_fs *c, struct bch_replicas_entry_v1 *r)
-{
-	return likely(bch2_replicas_marked(c, r))
-		? 0 : bch2_mark_replicas_slowpath(c, r);
-}
-
-/*
- * Old replicas_gc mechanism: only used for journal replicas entries now, should
- * die at some point:
- */
-
-int bch2_replicas_gc_end(struct bch_fs *c, int ret)
-{
-	lockdep_assert_held(&c->replicas_gc_lock);
-
-	mutex_lock(&c->sb_lock);
-	percpu_down_write(&c->mark_lock);
-
-	ret =   ret ?:
-		bch2_cpu_replicas_to_sb_replicas(c, &c->replicas_gc);
-	if (!ret)
-		swap(c->replicas, c->replicas_gc);
-
-	kfree(c->replicas_gc.entries);
-	c->replicas_gc.entries = NULL;
-
-	percpu_up_write(&c->mark_lock);
-
-	if (!ret)
-		bch2_write_super(c);
-
-	mutex_unlock(&c->sb_lock);
-
-	return ret;
-}
-
-int bch2_replicas_gc_start(struct bch_fs *c, unsigned typemask)
-{
-	struct bch_replicas_entry_v1 *e;
-	unsigned i = 0;
-
-	lockdep_assert_held(&c->replicas_gc_lock);
-
-	mutex_lock(&c->sb_lock);
-	BUG_ON(c->replicas_gc.entries);
-
-	c->replicas_gc.nr		= 0;
-	c->replicas_gc.entry_size	= 0;
-
-	for_each_cpu_replicas_entry(&c->replicas, e) {
-		/* Preserve unknown data types */
-		if (e->data_type >= BCH_DATA_NR ||
-		    !((1 << e->data_type) & typemask)) {
-			c->replicas_gc.nr++;
-			c->replicas_gc.entry_size =
-				max_t(unsigned, c->replicas_gc.entry_size,
-				      replicas_entry_bytes(e));
-		}
-	}
-
-	c->replicas_gc.entries = kcalloc(c->replicas_gc.nr,
-					 c->replicas_gc.entry_size,
-					 GFP_KERNEL);
-	if (!c->replicas_gc.entries) {
-		mutex_unlock(&c->sb_lock);
-		bch_err(c, "error allocating c->replicas_gc");
-		return bch_err_throw(c, ENOMEM_replicas_gc);
-	}
-
-	for_each_cpu_replicas_entry(&c->replicas, e)
-		if (e->data_type >= BCH_DATA_NR ||
-		    !((1 << e->data_type) & typemask))
-			memcpy(cpu_replicas_entry(&c->replicas_gc, i++),
-			       e, c->replicas_gc.entry_size);
-
-	bch2_cpu_replicas_sort(&c->replicas_gc);
-	mutex_unlock(&c->sb_lock);
-
-	return 0;
-}
-
-/*
- * New much simpler mechanism for clearing out unneeded replicas entries - drop
- * replicas entries that have 0 sectors used.
- *
- * However, we don't track sector counts for journal usage, so this doesn't drop
- * any BCH_DATA_journal entries; the old bch2_replicas_gc_(start|end) mechanism
- * is retained for that.
- */
-int bch2_replicas_gc2(struct bch_fs *c)
-{
-	struct bch_replicas_cpu new = { 0 };
-	unsigned nr;
-	int ret = 0;
-
-	bch2_accounting_mem_gc(c);
-retry:
-	nr		= READ_ONCE(c->replicas.nr);
-	new.entry_size	= READ_ONCE(c->replicas.entry_size);
-	new.entries	= kcalloc(nr, new.entry_size, GFP_KERNEL);
-	if (!new.entries) {
-		bch_err(c, "error allocating c->replicas_gc");
-		return bch_err_throw(c, ENOMEM_replicas_gc);
-	}
-
-	mutex_lock(&c->sb_lock);
-	percpu_down_write(&c->mark_lock);
-
-	if (nr			!= c->replicas.nr ||
-	    new.entry_size	!= c->replicas.entry_size) {
-		percpu_up_write(&c->mark_lock);
-		mutex_unlock(&c->sb_lock);
-		kfree(new.entries);
-		goto retry;
-	}
-
-	for (unsigned i = 0; i < c->replicas.nr; i++) {
-		struct bch_replicas_entry_v1 *e =
-			cpu_replicas_entry(&c->replicas, i);
-
-		struct disk_accounting_pos k = {
-			.type = BCH_DISK_ACCOUNTING_replicas,
-		};
-
-		unsafe_memcpy(&k.replicas, e, replicas_entry_bytes(e),
-			      "embedded variable length struct");
-
-		struct bpos p = disk_accounting_pos_to_bpos(&k);
-
-		struct bch_accounting_mem *acc = &c->accounting;
-		bool kill = eytzinger0_find(acc->k.data, acc->k.nr, sizeof(acc->k.data[0]),
-					    accounting_pos_cmp, &p) >= acc->k.nr;
-
-		if (e->data_type == BCH_DATA_journal || !kill)
-			memcpy(cpu_replicas_entry(&new, new.nr++),
-			       e, new.entry_size);
-	}
-
-	bch2_cpu_replicas_sort(&new);
-
-	ret = bch2_cpu_replicas_to_sb_replicas(c, &new);
-
-	if (!ret)
-		swap(c->replicas, new);
-
-	kfree(new.entries);
-
-	percpu_up_write(&c->mark_lock);
-
-	if (!ret)
-		bch2_write_super(c);
-
-	mutex_unlock(&c->sb_lock);
-
-	return ret;
-}
-
-/* Replicas tracking - superblock: */
-
-static int
-__bch2_sb_replicas_to_cpu_replicas(struct bch_sb_field_replicas *sb_r,
-				   struct bch_replicas_cpu *cpu_r)
-{
-	struct bch_replicas_entry_v1 *e, *dst;
-	unsigned nr = 0, entry_size = 0, idx = 0;
-
-	for_each_replicas_entry(sb_r, e) {
-		entry_size = max_t(unsigned, entry_size,
-				   replicas_entry_bytes(e));
-		nr++;
-	}
-
-	cpu_r->entries = kcalloc(nr, entry_size, GFP_KERNEL);
-	if (!cpu_r->entries)
-		return -BCH_ERR_ENOMEM_cpu_replicas;
-
-	cpu_r->nr		= nr;
-	cpu_r->entry_size	= entry_size;
-
-	for_each_replicas_entry(sb_r, e) {
-		dst = cpu_replicas_entry(cpu_r, idx++);
-		memcpy(dst, e, replicas_entry_bytes(e));
-		bch2_replicas_entry_sort(dst);
-	}
-
-	return 0;
-}
-
-static int
-__bch2_sb_replicas_v0_to_cpu_replicas(struct bch_sb_field_replicas_v0 *sb_r,
-				      struct bch_replicas_cpu *cpu_r)
-{
-	struct bch_replicas_entry_v0 *e;
-	unsigned nr = 0, entry_size = 0, idx = 0;
-
-	for_each_replicas_entry(sb_r, e) {
-		entry_size = max_t(unsigned, entry_size,
-				   replicas_entry_bytes(e));
-		nr++;
-	}
-
-	entry_size += sizeof(struct bch_replicas_entry_v1) -
-		sizeof(struct bch_replicas_entry_v0);
-
-	cpu_r->entries = kcalloc(nr, entry_size, GFP_KERNEL);
-	if (!cpu_r->entries)
-		return -BCH_ERR_ENOMEM_cpu_replicas;
-
-	cpu_r->nr		= nr;
-	cpu_r->entry_size	= entry_size;
-
-	for_each_replicas_entry(sb_r, e) {
-		struct bch_replicas_entry_v1 *dst =
-			cpu_replicas_entry(cpu_r, idx++);
-
-		dst->data_type	= e->data_type;
-		dst->nr_devs	= e->nr_devs;
-		dst->nr_required = 1;
-		memcpy(dst->devs, e->devs, e->nr_devs);
-		bch2_replicas_entry_sort(dst);
-	}
-
-	return 0;
-}
-
-int bch2_sb_replicas_to_cpu_replicas(struct bch_fs *c)
-{
-	struct bch_sb_field_replicas *sb_v1;
-	struct bch_sb_field_replicas_v0 *sb_v0;
-	struct bch_replicas_cpu new_r = { 0, 0, NULL };
-	int ret = 0;
-
-	if ((sb_v1 = bch2_sb_field_get(c->disk_sb.sb, replicas)))
-		ret = __bch2_sb_replicas_to_cpu_replicas(sb_v1, &new_r);
-	else if ((sb_v0 = bch2_sb_field_get(c->disk_sb.sb, replicas_v0)))
-		ret = __bch2_sb_replicas_v0_to_cpu_replicas(sb_v0, &new_r);
-	if (ret)
-		return ret;
-
-	bch2_cpu_replicas_sort(&new_r);
-
-	percpu_down_write(&c->mark_lock);
-	swap(c->replicas, new_r);
-	percpu_up_write(&c->mark_lock);
-
-	kfree(new_r.entries);
-
-	return 0;
-}
-
-static int bch2_cpu_replicas_to_sb_replicas_v0(struct bch_fs *c,
-					       struct bch_replicas_cpu *r)
-{
-	struct bch_sb_field_replicas_v0 *sb_r;
-	struct bch_replicas_entry_v0 *dst;
-	struct bch_replicas_entry_v1 *src;
-	size_t bytes;
-
-	bytes = sizeof(struct bch_sb_field_replicas);
-
-	for_each_cpu_replicas_entry(r, src)
-		bytes += replicas_entry_bytes(src) - 1;
-
-	sb_r = bch2_sb_field_resize(&c->disk_sb, replicas_v0,
-			DIV_ROUND_UP(bytes, sizeof(u64)));
-	if (!sb_r)
-		return bch_err_throw(c, ENOSPC_sb_replicas);
-
-	bch2_sb_field_delete(&c->disk_sb, BCH_SB_FIELD_replicas);
-	sb_r = bch2_sb_field_get(c->disk_sb.sb, replicas_v0);
-
-	memset(&sb_r->entries, 0,
-	       vstruct_end(&sb_r->field) -
-	       (void *) &sb_r->entries);
-
-	dst = sb_r->entries;
-	for_each_cpu_replicas_entry(r, src) {
-		dst->data_type	= src->data_type;
-		dst->nr_devs	= src->nr_devs;
-		memcpy(dst->devs, src->devs, src->nr_devs);
-
-		dst = replicas_entry_next(dst);
-
-		BUG_ON((void *) dst > vstruct_end(&sb_r->field));
-	}
-
-	return 0;
-}
-
-static int bch2_cpu_replicas_to_sb_replicas(struct bch_fs *c,
-					    struct bch_replicas_cpu *r)
-{
-	struct bch_sb_field_replicas *sb_r;
-	struct bch_replicas_entry_v1 *dst, *src;
-	bool need_v1 = false;
-	size_t bytes;
-
-	bytes = sizeof(struct bch_sb_field_replicas);
-
-	for_each_cpu_replicas_entry(r, src) {
-		bytes += replicas_entry_bytes(src);
-		if (src->nr_required != 1)
-			need_v1 = true;
-	}
-
-	if (!need_v1)
-		return bch2_cpu_replicas_to_sb_replicas_v0(c, r);
-
-	sb_r = bch2_sb_field_resize(&c->disk_sb, replicas,
-			DIV_ROUND_UP(bytes, sizeof(u64)));
-	if (!sb_r)
-		return bch_err_throw(c, ENOSPC_sb_replicas);
-
-	bch2_sb_field_delete(&c->disk_sb, BCH_SB_FIELD_replicas_v0);
-	sb_r = bch2_sb_field_get(c->disk_sb.sb, replicas);
-
-	memset(&sb_r->entries, 0,
-	       vstruct_end(&sb_r->field) -
-	       (void *) &sb_r->entries);
-
-	dst = sb_r->entries;
-	for_each_cpu_replicas_entry(r, src) {
-		memcpy(dst, src, replicas_entry_bytes(src));
-
-		dst = replicas_entry_next(dst);
-
-		BUG_ON((void *) dst > vstruct_end(&sb_r->field));
-	}
-
-	return 0;
-}
-
-static int bch2_cpu_replicas_validate(struct bch_replicas_cpu *cpu_r,
-				      struct bch_sb *sb,
-				      struct printbuf *err)
-{
-	unsigned i;
-
-	sort_r(cpu_r->entries,
-	       cpu_r->nr,
-	       cpu_r->entry_size,
-	       bch2_memcmp, NULL,
-	       (void *)(size_t)cpu_r->entry_size);
-
-	for (i = 0; i < cpu_r->nr; i++) {
-		struct bch_replicas_entry_v1 *e =
-			cpu_replicas_entry(cpu_r, i);
-
-		int ret = bch2_replicas_entry_sb_validate(e, sb, err);
-		if (ret)
-			return ret;
-
-		if (i + 1 < cpu_r->nr) {
-			struct bch_replicas_entry_v1 *n =
-				cpu_replicas_entry(cpu_r, i + 1);
-
-			BUG_ON(memcmp(e, n, cpu_r->entry_size) > 0);
-
-			if (!memcmp(e, n, cpu_r->entry_size)) {
-				prt_printf(err, "duplicate replicas entry ");
-				bch2_replicas_entry_to_text(err, e);
-				return -BCH_ERR_invalid_sb_replicas;
-			}
-		}
-	}
-
-	return 0;
-}
-
-static int bch2_sb_replicas_validate(struct bch_sb *sb, struct bch_sb_field *f,
-				     enum bch_validate_flags flags, struct printbuf *err)
-{
-	struct bch_sb_field_replicas *sb_r = field_to_type(f, replicas);
-	struct bch_replicas_cpu cpu_r;
-	int ret;
-
-	ret = __bch2_sb_replicas_to_cpu_replicas(sb_r, &cpu_r);
-	if (ret)
-		return ret;
-
-	ret = bch2_cpu_replicas_validate(&cpu_r, sb, err);
-	kfree(cpu_r.entries);
-	return ret;
-}
-
-static void bch2_sb_replicas_to_text(struct printbuf *out,
-				     struct bch_sb *sb,
-				     struct bch_sb_field *f)
-{
-	struct bch_sb_field_replicas *r = field_to_type(f, replicas);
-	struct bch_replicas_entry_v1 *e;
-	bool first = true;
-
-	for_each_replicas_entry(r, e) {
-		if (!first)
-			prt_printf(out, " ");
-		first = false;
-
-		bch2_replicas_entry_to_text(out, e);
-	}
-	prt_newline(out);
-}
-
-const struct bch_sb_field_ops bch_sb_field_ops_replicas = {
-	.validate	= bch2_sb_replicas_validate,
-	.to_text	= bch2_sb_replicas_to_text,
-};
-
-static int bch2_sb_replicas_v0_validate(struct bch_sb *sb, struct bch_sb_field *f,
-					enum bch_validate_flags flags, struct printbuf *err)
-{
-	struct bch_sb_field_replicas_v0 *sb_r = field_to_type(f, replicas_v0);
-	struct bch_replicas_cpu cpu_r;
-	int ret;
-
-	ret = __bch2_sb_replicas_v0_to_cpu_replicas(sb_r, &cpu_r);
-	if (ret)
-		return ret;
-
-	ret = bch2_cpu_replicas_validate(&cpu_r, sb, err);
-	kfree(cpu_r.entries);
-	return ret;
-}
-
-static void bch2_sb_replicas_v0_to_text(struct printbuf *out,
-					struct bch_sb *sb,
-					struct bch_sb_field *f)
-{
-	struct bch_sb_field_replicas_v0 *sb_r = field_to_type(f, replicas_v0);
-	struct bch_replicas_entry_v0 *e;
-	bool first = true;
-
-	for_each_replicas_entry(sb_r, e) {
-		if (!first)
-			prt_printf(out, " ");
-		first = false;
-
-		bch2_replicas_entry_v0_to_text(out, e);
-	}
-	prt_newline(out);
-}
-
-const struct bch_sb_field_ops bch_sb_field_ops_replicas_v0 = {
-	.validate	= bch2_sb_replicas_v0_validate,
-	.to_text	= bch2_sb_replicas_v0_to_text,
-};
-
-/* Query replicas: */
-
-bool bch2_have_enough_devs(struct bch_fs *c, struct bch_devs_mask devs,
-			   unsigned flags, bool print)
-{
-	struct bch_replicas_entry_v1 *e;
-	bool ret = true;
-
-	percpu_down_read(&c->mark_lock);
-	for_each_cpu_replicas_entry(&c->replicas, e) {
-		unsigned nr_online = 0, nr_failed = 0, dflags = 0;
-		bool metadata = e->data_type < BCH_DATA_user;
-
-		if (e->data_type == BCH_DATA_cached)
-			continue;
-
-		scoped_guard(rcu)
-			for (unsigned i = 0; i < e->nr_devs; i++) {
-				if (e->devs[i] == BCH_SB_MEMBER_INVALID) {
-					nr_failed++;
-					continue;
-				}
-
-				nr_online += test_bit(e->devs[i], devs.d);
-
-				struct bch_dev *ca = bch2_dev_rcu_noerror(c, e->devs[i]);
-				nr_failed += !ca || ca->mi.state == BCH_MEMBER_STATE_failed;
-			}
-
-		if (nr_online + nr_failed == e->nr_devs)
-			continue;
-
-		if (nr_online < e->nr_required)
-			dflags |= metadata
-				? BCH_FORCE_IF_METADATA_LOST
-				: BCH_FORCE_IF_DATA_LOST;
-
-		if (nr_online < e->nr_devs)
-			dflags |= metadata
-				? BCH_FORCE_IF_METADATA_DEGRADED
-				: BCH_FORCE_IF_DATA_DEGRADED;
-
-		if (dflags & ~flags) {
-			if (print) {
-				struct printbuf buf = PRINTBUF;
-
-				bch2_replicas_entry_to_text(&buf, e);
-				bch_err(c, "insufficient devices online (%u) for replicas entry %s",
-					nr_online, buf.buf);
-				printbuf_exit(&buf);
-			}
-			ret = false;
-			break;
-		}
-
-	}
-	percpu_up_read(&c->mark_lock);
-
-	return ret;
-}
-
-unsigned bch2_sb_dev_has_data(struct bch_sb *sb, unsigned dev)
-{
-	struct bch_sb_field_replicas *replicas;
-	struct bch_sb_field_replicas_v0 *replicas_v0;
-	unsigned data_has = 0;
-
-	replicas = bch2_sb_field_get(sb, replicas);
-	replicas_v0 = bch2_sb_field_get(sb, replicas_v0);
-
-	if (replicas) {
-		struct bch_replicas_entry_v1 *r;
-
-		for_each_replicas_entry(replicas, r) {
-			if (r->data_type >= sizeof(data_has) * 8)
-				continue;
-
-			for (unsigned i = 0; i < r->nr_devs; i++)
-				if (r->devs[i] == dev)
-					data_has |= 1 << r->data_type;
-		}
-
-	} else if (replicas_v0) {
-		struct bch_replicas_entry_v0 *r;
-
-		for_each_replicas_entry_v0(replicas_v0, r) {
-			if (r->data_type >= sizeof(data_has) * 8)
-				continue;
-
-			for (unsigned i = 0; i < r->nr_devs; i++)
-				if (r->devs[i] == dev)
-					data_has |= 1 << r->data_type;
-		}
-	}
-
-
-	return data_has;
-}
-
-unsigned bch2_dev_has_data(struct bch_fs *c, struct bch_dev *ca)
-{
-	mutex_lock(&c->sb_lock);
-	unsigned ret = bch2_sb_dev_has_data(c->disk_sb.sb, ca->dev_idx);
-	mutex_unlock(&c->sb_lock);
-
-	return ret;
-}
-
-void bch2_fs_replicas_exit(struct bch_fs *c)
-{
-	kfree(c->replicas.entries);
-	kfree(c->replicas_gc.entries);
-}