1 files changed, 0 insertions, 617 deletions

diff --git a/c_src/libbcachefs/disk_groups.c b/c_src/libbcachefs/disk_groups.c
deleted file mode 100644
index 06a7df52..00000000
--- a/c_src/libbcachefs/disk_groups.c
+++ /dev/null
@@ -1,617 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include "bcachefs.h"
-#include "disk_groups.h"
-#include "sb-members.h"
-#include "super-io.h"
-
-#include <linux/sort.h>
-
-static int group_cmp(const void *_l, const void *_r)
-{
-	const struct bch_disk_group *l = _l;
-	const struct bch_disk_group *r = _r;
-
-	return ((BCH_GROUP_DELETED(l) > BCH_GROUP_DELETED(r)) -
-		(BCH_GROUP_DELETED(l) < BCH_GROUP_DELETED(r))) ?:
-		((BCH_GROUP_PARENT(l) > BCH_GROUP_PARENT(r)) -
-		 (BCH_GROUP_PARENT(l) < BCH_GROUP_PARENT(r))) ?:
-		strncmp(l->label, r->label, sizeof(l->label));
-}
-
-static int bch2_sb_disk_groups_validate(struct bch_sb *sb,
-					struct bch_sb_field *f,
-					struct printbuf *err)
-{
-	struct bch_sb_field_disk_groups *groups =
-		field_to_type(f, disk_groups);
-	struct bch_disk_group *g, *sorted = NULL;
-	unsigned nr_groups = disk_groups_nr(groups);
-	unsigned i, len;
-	int ret = 0;
-
-	for (i = 0; i < sb->nr_devices; i++) {
-		struct bch_member m = bch2_sb_member_get(sb, i);
-		unsigned group_id;
-
-		if (!BCH_MEMBER_GROUP(&m))
-			continue;
-
-		group_id = BCH_MEMBER_GROUP(&m) - 1;
-
-		if (group_id >= nr_groups) {
-			prt_printf(err, "disk %u has invalid label %u (have %u)",
-				   i, group_id, nr_groups);
-			return -BCH_ERR_invalid_sb_disk_groups;
-		}
-
-		if (BCH_GROUP_DELETED(&groups->entries[group_id])) {
-			prt_printf(err, "disk %u has deleted label %u", i, group_id);
-			return -BCH_ERR_invalid_sb_disk_groups;
-		}
-	}
-
-	if (!nr_groups)
-		return 0;
-
-	for (i = 0; i < nr_groups; i++) {
-		g = groups->entries + i;
-
-		if (BCH_GROUP_DELETED(g))
-			continue;
-
-		len = strnlen(g->label, sizeof(g->label));
-		if (!len) {
-			prt_printf(err, "label %u empty", i);
-			return -BCH_ERR_invalid_sb_disk_groups;
-		}
-	}
-
-	sorted = kmalloc_array(nr_groups, sizeof(*sorted), GFP_KERNEL);
-	if (!sorted)
-		return -BCH_ERR_ENOMEM_disk_groups_validate;
-
-	memcpy(sorted, groups->entries, nr_groups * sizeof(*sorted));
-	sort(sorted, nr_groups, sizeof(*sorted), group_cmp, NULL);
-
-	for (g = sorted; g + 1 < sorted + nr_groups; g++)
-		if (!BCH_GROUP_DELETED(g) &&
-		    !group_cmp(&g[0], &g[1])) {
-			prt_printf(err, "duplicate label %llu.%.*s",
-			       BCH_GROUP_PARENT(g),
-			       (int) sizeof(g->label), g->label);
-			ret = -BCH_ERR_invalid_sb_disk_groups;
-			goto err;
-		}
-err:
-	kfree(sorted);
-	return ret;
-}
-
-void bch2_disk_groups_to_text(struct printbuf *out, struct bch_fs *c)
-{
-	out->atomic++;
-	rcu_read_lock();
-
-	struct bch_disk_groups_cpu *g = rcu_dereference(c->disk_groups);
-	if (!g)
-		goto out;
-
-	for (unsigned i = 0; i < g->nr; i++) {
-		if (i)
-			prt_printf(out, " ");
-
-		if (g->entries[i].deleted) {
-			prt_printf(out, "[deleted]");
-			continue;
-		}
-
-		prt_printf(out, "[parent %d devs", g->entries[i].parent);
-		for_each_member_device_rcu(c, ca, &g->entries[i].devs)
-			prt_printf(out, " %s", ca->name);
-		prt_printf(out, "]");
-	}
-
-out:
-	rcu_read_unlock();
-	out->atomic--;
-}
-
-static void bch2_sb_disk_groups_to_text(struct printbuf *out,
-					struct bch_sb *sb,
-					struct bch_sb_field *f)
-{
-	struct bch_sb_field_disk_groups *groups =
-		field_to_type(f, disk_groups);
-	struct bch_disk_group *g;
-	unsigned nr_groups = disk_groups_nr(groups);
-
-	for (g = groups->entries;
-	     g < groups->entries + nr_groups;
-	     g++) {
-		if (g != groups->entries)
-			prt_printf(out, " ");
-
-		if (BCH_GROUP_DELETED(g))
-			prt_printf(out, "[deleted]");
-		else
-			prt_printf(out, "[parent %llu name %s]",
-			       BCH_GROUP_PARENT(g), g->label);
-	}
-}
-
-const struct bch_sb_field_ops bch_sb_field_ops_disk_groups = {
-	.validate	= bch2_sb_disk_groups_validate,
-	.to_text	= bch2_sb_disk_groups_to_text
-};
-
-int bch2_sb_disk_groups_to_cpu(struct bch_fs *c)
-{
-	struct bch_sb_field_disk_groups *groups;
-	struct bch_disk_groups_cpu *cpu_g, *old_g;
-	unsigned i, g, nr_groups;
-
-	lockdep_assert_held(&c->sb_lock);
-
-	groups		= bch2_sb_field_get(c->disk_sb.sb, disk_groups);
-	nr_groups	= disk_groups_nr(groups);
-
-	if (!groups)
-		return 0;
-
-	cpu_g = kzalloc(struct_size(cpu_g, entries, nr_groups), GFP_KERNEL);
-	if (!cpu_g)
-		return -BCH_ERR_ENOMEM_disk_groups_to_cpu;
-
-	cpu_g->nr = nr_groups;
-
-	for (i = 0; i < nr_groups; i++) {
-		struct bch_disk_group *src	= &groups->entries[i];
-		struct bch_disk_group_cpu *dst	= &cpu_g->entries[i];
-
-		dst->deleted	= BCH_GROUP_DELETED(src);
-		dst->parent	= BCH_GROUP_PARENT(src);
-		memcpy(dst->label, src->label, sizeof(dst->label));
-	}
-
-	for (i = 0; i < c->disk_sb.sb->nr_devices; i++) {
-		struct bch_member m = bch2_sb_member_get(c->disk_sb.sb, i);
-		struct bch_disk_group_cpu *dst;
-
-		if (!bch2_member_exists(&m))
-			continue;
-
-		g = BCH_MEMBER_GROUP(&m);
-		while (g) {
-			dst = &cpu_g->entries[g - 1];
-			__set_bit(i, dst->devs.d);
-			g = dst->parent;
-		}
-	}
-
-	old_g = rcu_dereference_protected(c->disk_groups,
-				lockdep_is_held(&c->sb_lock));
-	rcu_assign_pointer(c->disk_groups, cpu_g);
-	if (old_g)
-		kfree_rcu(old_g, rcu);
-
-	return 0;
-}
-
-const struct bch_devs_mask *bch2_target_to_mask(struct bch_fs *c, unsigned target)
-{
-	struct target t = target_decode(target);
-	struct bch_devs_mask *devs;
-
-	rcu_read_lock();
-
-	switch (t.type) {
-	case TARGET_NULL:
-		devs = NULL;
-		break;
-	case TARGET_DEV: {
-		struct bch_dev *ca = t.dev < c->sb.nr_devices
-			? rcu_dereference(c->devs[t.dev])
-			: NULL;
-		devs = ca ? &ca->self : NULL;
-		break;
-	}
-	case TARGET_GROUP: {
-		struct bch_disk_groups_cpu *g = rcu_dereference(c->disk_groups);
-
-		devs = g && t.group < g->nr && !g->entries[t.group].deleted
-			? &g->entries[t.group].devs
-			: NULL;
-		break;
-	}
-	default:
-		BUG();
-	}
-
-	rcu_read_unlock();
-
-	return devs;
-}
-
-bool bch2_dev_in_target(struct bch_fs *c, unsigned dev, unsigned target)
-{
-	struct target t = target_decode(target);
-
-	switch (t.type) {
-	case TARGET_NULL:
-		return false;
-	case TARGET_DEV:
-		return dev == t.dev;
-	case TARGET_GROUP: {
-		struct bch_disk_groups_cpu *g;
-		const struct bch_devs_mask *m;
-		bool ret;
-
-		rcu_read_lock();
-		g = rcu_dereference(c->disk_groups);
-		m = g && t.group < g->nr && !g->entries[t.group].deleted
-			? &g->entries[t.group].devs
-			: NULL;
-
-		ret = m ? test_bit(dev, m->d) : false;
-		rcu_read_unlock();
-
-		return ret;
-	}
-	default:
-		BUG();
-	}
-}
-
-static int __bch2_disk_group_find(struct bch_sb_field_disk_groups *groups,
-				  unsigned parent,
-				  const char *name, unsigned namelen)
-{
-	unsigned i, nr_groups = disk_groups_nr(groups);
-
-	if (!namelen || namelen > BCH_SB_LABEL_SIZE)
-		return -EINVAL;
-
-	for (i = 0; i < nr_groups; i++) {
-		struct bch_disk_group *g = groups->entries + i;
-
-		if (BCH_GROUP_DELETED(g))
-			continue;
-
-		if (!BCH_GROUP_DELETED(g) &&
-		    BCH_GROUP_PARENT(g) == parent &&
-		    strnlen(g->label, sizeof(g->label)) == namelen &&
-		    !memcmp(name, g->label, namelen))
-			return i;
-	}
-
-	return -1;
-}
-
-static int __bch2_disk_group_add(struct bch_sb_handle *sb, unsigned parent,
-				 const char *name, unsigned namelen)
-{
-	struct bch_sb_field_disk_groups *groups =
-		bch2_sb_field_get(sb->sb, disk_groups);
-	unsigned i, nr_groups = disk_groups_nr(groups);
-	struct bch_disk_group *g;
-
-	if (!namelen || namelen > BCH_SB_LABEL_SIZE)
-		return -EINVAL;
-
-	for (i = 0;
-	     i < nr_groups && !BCH_GROUP_DELETED(&groups->entries[i]);
-	     i++)
-		;
-
-	if (i == nr_groups) {
-		unsigned u64s =
-			(sizeof(struct bch_sb_field_disk_groups) +
-			 sizeof(struct bch_disk_group) * (nr_groups + 1)) /
-			sizeof(u64);
-
-		groups = bch2_sb_field_resize(sb, disk_groups, u64s);
-		if (!groups)
-			return -BCH_ERR_ENOSPC_disk_label_add;
-
-		nr_groups = disk_groups_nr(groups);
-	}
-
-	BUG_ON(i >= nr_groups);
-
-	g = &groups->entries[i];
-
-	memcpy(g->label, name, namelen);
-	if (namelen < sizeof(g->label))
-		g->label[namelen] = '\0';
-	SET_BCH_GROUP_DELETED(g, 0);
-	SET_BCH_GROUP_PARENT(g, parent);
-	SET_BCH_GROUP_DATA_ALLOWED(g, ~0);
-
-	return i;
-}
-
-int bch2_disk_path_find(struct bch_sb_handle *sb, const char *name)
-{
-	struct bch_sb_field_disk_groups *groups =
-		bch2_sb_field_get(sb->sb, disk_groups);
-	int v = -1;
-
-	do {
-		const char *next = strchrnul(name, '.');
-		unsigned len = next - name;
-
-		if (*next == '.')
-			next++;
-
-		v = __bch2_disk_group_find(groups, v + 1, name, len);
-		name = next;
-	} while (*name && v >= 0);
-
-	return v;
-}
-
-int bch2_disk_path_find_or_create(struct bch_sb_handle *sb, const char *name)
-{
-	struct bch_sb_field_disk_groups *groups;
-	unsigned parent = 0;
-	int v = -1;
-
-	do {
-		const char *next = strchrnul(name, '.');
-		unsigned len = next - name;
-
-		if (*next == '.')
-			next++;
-
-		groups = bch2_sb_field_get(sb->sb, disk_groups);
-
-		v = __bch2_disk_group_find(groups, parent, name, len);
-		if (v < 0)
-			v = __bch2_disk_group_add(sb, parent, name, len);
-		if (v < 0)
-			return v;
-
-		parent = v + 1;
-		name = next;
-	} while (*name && v >= 0);
-
-	return v;
-}
-
-void bch2_disk_path_to_text(struct printbuf *out, struct bch_fs *c, unsigned v)
-{
-	struct bch_disk_groups_cpu *groups;
-	struct bch_disk_group_cpu *g;
-	unsigned nr = 0;
-	u16 path[32];
-
-	out->atomic++;
-	rcu_read_lock();
-	groups = rcu_dereference(c->disk_groups);
-	if (!groups)
-		goto invalid;
-
-	while (1) {
-		if (nr == ARRAY_SIZE(path))
-			goto invalid;
-
-		if (v >= groups->nr)
-			goto invalid;
-
-		g = groups->entries + v;
-
-		if (g->deleted)
-			goto invalid;
-
-		path[nr++] = v;
-
-		if (!g->parent)
-			break;
-
-		v = g->parent - 1;
-	}
-
-	while (nr) {
-		v = path[--nr];
-		g = groups->entries + v;
-
-		prt_printf(out, "%.*s", (int) sizeof(g->label), g->label);
-		if (nr)
-			prt_printf(out, ".");
-	}
-out:
-	rcu_read_unlock();
-	out->atomic--;
-	return;
-invalid:
-	prt_printf(out, "invalid label %u", v);
-	goto out;
-}
-
-void bch2_disk_path_to_text_sb(struct printbuf *out, struct bch_sb *sb, unsigned v)
-{
-	struct bch_sb_field_disk_groups *groups =
-		bch2_sb_field_get(sb, disk_groups);
-	struct bch_disk_group *g;
-	unsigned nr = 0;
-	u16 path[32];
-
-	while (1) {
-		if (nr == ARRAY_SIZE(path))
-			goto inval;
-
-		if (v >= disk_groups_nr(groups))
-			goto inval;
-
-		g = groups->entries + v;
-
-		if (BCH_GROUP_DELETED(g))
-			goto inval;
-
-		path[nr++] = v;
-
-		if (!BCH_GROUP_PARENT(g))
-			break;
-
-		v = BCH_GROUP_PARENT(g) - 1;
-	}
-
-	while (nr) {
-		v = path[--nr];
-		g = groups->entries + v;
-
-		prt_printf(out, "%.*s", (int) sizeof(g->label), g->label);
-		if (nr)
-			prt_printf(out, ".");
-	}
-	return;
-inval:
-	prt_printf(out, "invalid label %u", v);
-}
-
-int __bch2_dev_group_set(struct bch_fs *c, struct bch_dev *ca, const char *name)
-{
-	struct bch_member *mi;
-	int ret, v = -1;
-
-	if (!strlen(name) || !strcmp(name, "none"))
-		return 0;
-
-	v = bch2_disk_path_find_or_create(&c->disk_sb, name);
-	if (v < 0)
-		return v;
-
-	ret = bch2_sb_disk_groups_to_cpu(c);
-	if (ret)
-		return ret;
-
-	mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
-	SET_BCH_MEMBER_GROUP(mi, v + 1);
-	return 0;
-}
-
-int bch2_dev_group_set(struct bch_fs *c, struct bch_dev *ca, const char *name)
-{
-	int ret;
-
-	mutex_lock(&c->sb_lock);
-	ret = __bch2_dev_group_set(c, ca, name) ?:
-		bch2_write_super(c);
-	mutex_unlock(&c->sb_lock);
-
-	return ret;
-}
-
-int bch2_opt_target_parse(struct bch_fs *c, const char *val, u64 *res,
-			  struct printbuf *err)
-{
-	struct bch_dev *ca;
-	int g;
-
-	if (!val)
-		return -EINVAL;
-
-	if (!c)
-		return 0;
-
-	if (!strlen(val) || !strcmp(val, "none")) {
-		*res = 0;
-		return 0;
-	}
-
-	/* Is it a device? */
-	ca = bch2_dev_lookup(c, val);
-	if (!IS_ERR(ca)) {
-		*res = dev_to_target(ca->dev_idx);
-		percpu_ref_put(&ca->ref);
-		return 0;
-	}
-
-	mutex_lock(&c->sb_lock);
-	g = bch2_disk_path_find(&c->disk_sb, val);
-	mutex_unlock(&c->sb_lock);
-
-	if (g >= 0) {
-		*res = group_to_target(g);
-		return 0;
-	}
-
-	return -EINVAL;
-}
-
-void bch2_target_to_text(struct printbuf *out, struct bch_fs *c, unsigned v)
-{
-	struct target t = target_decode(v);
-
-	switch (t.type) {
-	case TARGET_NULL:
-		prt_printf(out, "none");
-		break;
-	case TARGET_DEV: {
-		struct bch_dev *ca;
-
-		out->atomic++;
-		rcu_read_lock();
-		ca = t.dev < c->sb.nr_devices
-			? rcu_dereference(c->devs[t.dev])
-			: NULL;
-
-		if (ca && percpu_ref_tryget(&ca->io_ref)) {
-			prt_printf(out, "/dev/%s", ca->name);
-			percpu_ref_put(&ca->io_ref);
-		} else if (ca) {
-			prt_printf(out, "offline device %u", t.dev);
-		} else {
-			prt_printf(out, "invalid device %u", t.dev);
-		}
-
-		rcu_read_unlock();
-		out->atomic--;
-		break;
-	}
-	case TARGET_GROUP:
-		bch2_disk_path_to_text(out, c, t.group);
-		break;
-	default:
-		BUG();
-	}
-}
-
-static void bch2_target_to_text_sb(struct printbuf *out, struct bch_sb *sb, unsigned v)
-{
-	struct target t = target_decode(v);
-
-	switch (t.type) {
-	case TARGET_NULL:
-		prt_printf(out, "none");
-		break;
-	case TARGET_DEV: {
-		struct bch_member m = bch2_sb_member_get(sb, t.dev);
-
-		if (bch2_dev_exists(sb, t.dev)) {
-			prt_printf(out, "Device ");
-			pr_uuid(out, m.uuid.b);
-			prt_printf(out, " (%u)", t.dev);
-		} else {
-			prt_printf(out, "Bad device %u", t.dev);
-		}
-		break;
-	}
-	case TARGET_GROUP:
-		bch2_disk_path_to_text_sb(out, sb, t.group);
-		break;
-	default:
-		BUG();
-	}
-}
-
-void bch2_opt_target_to_text(struct printbuf *out,
-			     struct bch_fs *c,
-			     struct bch_sb *sb,
-			     u64 v)
-{
-	if (c)
-		bch2_target_to_text(out, c, v);
-	else
-		bch2_target_to_text_sb(out, sb, v);
-}