Move c_src dirs back to toplevel

We just wanted c sourcefiles out of the top level, not c source
directories.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 0 insertions, 999 deletions

diff --git a/c_src/libbcachefs/chardev.c b/c_src/libbcachefs/chardev.c
deleted file mode 100644
index 226b39c1..00000000
--- a/c_src/libbcachefs/chardev.c
+++ /dev/null
@@ -1,999 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#ifndef NO_BCACHEFS_CHARDEV
-
-#include "bcachefs.h"
-#include "bcachefs_ioctl.h"
-#include "buckets.h"
-#include "chardev.h"
-#include "journal.h"
-#include "move.h"
-#include "recovery.h"
-#include "replicas.h"
-#include "super.h"
-#include "super-io.h"
-#include "thread_with_file.h"
-
-#include <linux/cdev.h>
-#include <linux/device.h>
-#include <linux/fs.h>
-#include <linux/ioctl.h>
-#include <linux/major.h>
-#include <linux/sched/task.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-
-__must_check
-static int copy_to_user_errcode(void __user *to, const void *from, unsigned long n)
-{
-	return copy_to_user(to, from, n) ? -EFAULT : 0;
-}
-
-/* returns with ref on ca->ref */
-static struct bch_dev *bch2_device_lookup(struct bch_fs *c, u64 dev,
-					  unsigned flags)
-{
-	struct bch_dev *ca;
-
-	if (flags & BCH_BY_INDEX) {
-		if (dev >= c->sb.nr_devices)
-			return ERR_PTR(-EINVAL);
-
-		rcu_read_lock();
-		ca = rcu_dereference(c->devs[dev]);
-		if (ca)
-			percpu_ref_get(&ca->ref);
-		rcu_read_unlock();
-
-		if (!ca)
-			return ERR_PTR(-EINVAL);
-	} else {
-		char *path;
-
-		path = strndup_user((const char __user *)
-				    (unsigned long) dev, PATH_MAX);
-		if (IS_ERR(path))
-			return ERR_CAST(path);
-
-		ca = bch2_dev_lookup(c, path);
-		kfree(path);
-	}
-
-	return ca;
-}
-
-#if 0
-static long bch2_ioctl_assemble(struct bch_ioctl_assemble __user *user_arg)
-{
-	struct bch_ioctl_assemble arg;
-	struct bch_fs *c;
-	u64 *user_devs = NULL;
-	char **devs = NULL;
-	unsigned i;
-	int ret = -EFAULT;
-
-	if (copy_from_user(&arg, user_arg, sizeof(arg)))
-		return -EFAULT;
-
-	if (arg.flags || arg.pad)
-		return -EINVAL;
-
-	user_devs = kmalloc_array(arg.nr_devs, sizeof(u64), GFP_KERNEL);
-	if (!user_devs)
-		return -ENOMEM;
-
-	devs = kcalloc(arg.nr_devs, sizeof(char *), GFP_KERNEL);
-
-	if (copy_from_user(user_devs, user_arg->devs,
-			   sizeof(u64) * arg.nr_devs))
-		goto err;
-
-	for (i = 0; i < arg.nr_devs; i++) {
-		devs[i] = strndup_user((const char __user *)(unsigned long)
-				       user_devs[i],
-				       PATH_MAX);
-		ret= PTR_ERR_OR_ZERO(devs[i]);
-		if (ret)
-			goto err;
-	}
-
-	c = bch2_fs_open(devs, arg.nr_devs, bch2_opts_empty());
-	ret = PTR_ERR_OR_ZERO(c);
-	if (!ret)
-		closure_put(&c->cl);
-err:
-	if (devs)
-		for (i = 0; i < arg.nr_devs; i++)
-			kfree(devs[i]);
-	kfree(devs);
-	return ret;
-}
-
-static long bch2_ioctl_incremental(struct bch_ioctl_incremental __user *user_arg)
-{
-	struct bch_ioctl_incremental arg;
-	const char *err;
-	char *path;
-
-	if (copy_from_user(&arg, user_arg, sizeof(arg)))
-		return -EFAULT;
-
-	if (arg.flags || arg.pad)
-		return -EINVAL;
-
-	path = strndup_user((const char __user *)(unsigned long) arg.dev, PATH_MAX);
-	ret = PTR_ERR_OR_ZERO(path);
-	if (ret)
-		return ret;
-
-	err = bch2_fs_open_incremental(path);
-	kfree(path);
-
-	if (err) {
-		pr_err("Could not register bcachefs devices: %s", err);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-#endif
-
-struct fsck_thread {
-	struct thread_with_stdio thr;
-	struct bch_fs		*c;
-	char			**devs;
-	size_t			nr_devs;
-	struct bch_opts		opts;
-};
-
-static void bch2_fsck_thread_exit(struct thread_with_stdio *_thr)
-{
-	struct fsck_thread *thr = container_of(_thr, struct fsck_thread, thr);
-	if (thr->devs)
-		for (size_t i = 0; i < thr->nr_devs; i++)
-			kfree(thr->devs[i]);
-	kfree(thr->devs);
-	kfree(thr);
-}
-
-static int bch2_fsck_offline_thread_fn(void *arg)
-{
-	struct fsck_thread *thr = container_of(arg, struct fsck_thread, thr);
-	struct bch_fs *c = bch2_fs_open(thr->devs, thr->nr_devs, thr->opts);
-
-	thr->thr.thr.ret = PTR_ERR_OR_ZERO(c);
-	if (!thr->thr.thr.ret)
-		bch2_fs_stop(c);
-
-	thread_with_stdio_done(&thr->thr);
-	return 0;
-}
-
-static long bch2_ioctl_fsck_offline(struct bch_ioctl_fsck_offline __user *user_arg)
-{
-	struct bch_ioctl_fsck_offline arg;
-	struct fsck_thread *thr = NULL;
-	u64 *devs = NULL;
-	long ret = 0;
-
-	if (copy_from_user(&arg, user_arg, sizeof(arg)))
-		return -EFAULT;
-
-	if (arg.flags)
-		return -EINVAL;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (!(devs = kcalloc(arg.nr_devs, sizeof(*devs), GFP_KERNEL)) ||
-	    !(thr = kzalloc(sizeof(*thr), GFP_KERNEL)) ||
-	    !(thr->devs = kcalloc(arg.nr_devs, sizeof(*thr->devs), GFP_KERNEL))) {
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	thr->opts = bch2_opts_empty();
-	thr->nr_devs = arg.nr_devs;
-
-	if (copy_from_user(devs, &user_arg->devs[0],
-			   array_size(sizeof(user_arg->devs[0]), arg.nr_devs))) {
-		ret = -EINVAL;
-		goto err;
-	}
-
-	for (size_t i = 0; i < arg.nr_devs; i++) {
-		thr->devs[i] = strndup_user((char __user *)(unsigned long) devs[i], PATH_MAX);
-		ret = PTR_ERR_OR_ZERO(thr->devs[i]);
-		if (ret)
-			goto err;
-	}
-
-	if (arg.opts) {
-		char *optstr = strndup_user((char __user *)(unsigned long) arg.opts, 1 << 16);
-
-		ret =   PTR_ERR_OR_ZERO(optstr) ?:
-			bch2_parse_mount_opts(NULL, &thr->opts, optstr);
-		kfree(optstr);
-
-		if (ret)
-			goto err;
-	}
-
-	opt_set(thr->opts, stdio, (u64)(unsigned long)&thr->thr.stdio);
-
-	ret = bch2_run_thread_with_stdio(&thr->thr,
-			bch2_fsck_thread_exit,
-			bch2_fsck_offline_thread_fn);
-err:
-	if (ret < 0) {
-		if (thr)
-			bch2_fsck_thread_exit(&thr->thr);
-		pr_err("ret %s", bch2_err_str(ret));
-	}
-	kfree(devs);
-	return ret;
-}
-
-static long bch2_global_ioctl(unsigned cmd, void __user *arg)
-{
-	long ret;
-
-	switch (cmd) {
-#if 0
-	case BCH_IOCTL_ASSEMBLE:
-		return bch2_ioctl_assemble(arg);
-	case BCH_IOCTL_INCREMENTAL:
-		return bch2_ioctl_incremental(arg);
-#endif
-	case BCH_IOCTL_FSCK_OFFLINE: {
-		ret = bch2_ioctl_fsck_offline(arg);
-		break;
-	}
-	default:
-		ret = -ENOTTY;
-		break;
-	}
-
-	if (ret < 0)
-		ret = bch2_err_class(ret);
-	return ret;
-}
-
-static long bch2_ioctl_query_uuid(struct bch_fs *c,
-			struct bch_ioctl_query_uuid __user *user_arg)
-{
-	return copy_to_user_errcode(&user_arg->uuid, &c->sb.user_uuid,
-				    sizeof(c->sb.user_uuid));
-}
-
-#if 0
-static long bch2_ioctl_start(struct bch_fs *c, struct bch_ioctl_start arg)
-{
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (arg.flags || arg.pad)
-		return -EINVAL;
-
-	return bch2_fs_start(c);
-}
-
-static long bch2_ioctl_stop(struct bch_fs *c)
-{
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	bch2_fs_stop(c);
-	return 0;
-}
-#endif
-
-static long bch2_ioctl_disk_add(struct bch_fs *c, struct bch_ioctl_disk arg)
-{
-	char *path;
-	int ret;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (arg.flags || arg.pad)
-		return -EINVAL;
-
-	path = strndup_user((const char __user *)(unsigned long) arg.dev, PATH_MAX);
-	ret = PTR_ERR_OR_ZERO(path);
-	if (ret)
-		return ret;
-
-	ret = bch2_dev_add(c, path);
-	kfree(path);
-
-	return ret;
-}
-
-static long bch2_ioctl_disk_remove(struct bch_fs *c, struct bch_ioctl_disk arg)
-{
-	struct bch_dev *ca;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if ((arg.flags & ~(BCH_FORCE_IF_DATA_LOST|
-			   BCH_FORCE_IF_METADATA_LOST|
-			   BCH_FORCE_IF_DEGRADED|
-			   BCH_BY_INDEX)) ||
-	    arg.pad)
-		return -EINVAL;
-
-	ca = bch2_device_lookup(c, arg.dev, arg.flags);
-	if (IS_ERR(ca))
-		return PTR_ERR(ca);
-
-	return bch2_dev_remove(c, ca, arg.flags);
-}
-
-static long bch2_ioctl_disk_online(struct bch_fs *c, struct bch_ioctl_disk arg)
-{
-	char *path;
-	int ret;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (arg.flags || arg.pad)
-		return -EINVAL;
-
-	path = strndup_user((const char __user *)(unsigned long) arg.dev, PATH_MAX);
-	ret = PTR_ERR_OR_ZERO(path);
-	if (ret)
-		return ret;
-
-	ret = bch2_dev_online(c, path);
-	kfree(path);
-	return ret;
-}
-
-static long bch2_ioctl_disk_offline(struct bch_fs *c, struct bch_ioctl_disk arg)
-{
-	struct bch_dev *ca;
-	int ret;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if ((arg.flags & ~(BCH_FORCE_IF_DATA_LOST|
-			   BCH_FORCE_IF_METADATA_LOST|
-			   BCH_FORCE_IF_DEGRADED|
-			   BCH_BY_INDEX)) ||
-	    arg.pad)
-		return -EINVAL;
-
-	ca = bch2_device_lookup(c, arg.dev, arg.flags);
-	if (IS_ERR(ca))
-		return PTR_ERR(ca);
-
-	ret = bch2_dev_offline(c, ca, arg.flags);
-	percpu_ref_put(&ca->ref);
-	return ret;
-}
-
-static long bch2_ioctl_disk_set_state(struct bch_fs *c,
-			struct bch_ioctl_disk_set_state arg)
-{
-	struct bch_dev *ca;
-	int ret;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if ((arg.flags & ~(BCH_FORCE_IF_DATA_LOST|
-			   BCH_FORCE_IF_METADATA_LOST|
-			   BCH_FORCE_IF_DEGRADED|
-			   BCH_BY_INDEX)) ||
-	    arg.pad[0] || arg.pad[1] || arg.pad[2] ||
-	    arg.new_state >= BCH_MEMBER_STATE_NR)
-		return -EINVAL;
-
-	ca = bch2_device_lookup(c, arg.dev, arg.flags);
-	if (IS_ERR(ca))
-		return PTR_ERR(ca);
-
-	ret = bch2_dev_set_state(c, ca, arg.new_state, arg.flags);
-	if (ret)
-		bch_err(c, "Error setting device state: %s", bch2_err_str(ret));
-
-	percpu_ref_put(&ca->ref);
-	return ret;
-}
-
-struct bch_data_ctx {
-	struct thread_with_file		thr;
-
-	struct bch_fs			*c;
-	struct bch_ioctl_data		arg;
-	struct bch_move_stats		stats;
-};
-
-static int bch2_data_thread(void *arg)
-{
-	struct bch_data_ctx *ctx = container_of(arg, struct bch_data_ctx, thr);
-
-	ctx->thr.ret = bch2_data_job(ctx->c, &ctx->stats, ctx->arg);
-	ctx->stats.data_type = U8_MAX;
-	return 0;
-}
-
-static int bch2_data_job_release(struct inode *inode, struct file *file)
-{
-	struct bch_data_ctx *ctx = container_of(file->private_data, struct bch_data_ctx, thr);
-
-	bch2_thread_with_file_exit(&ctx->thr);
-	kfree(ctx);
-	return 0;
-}
-
-static ssize_t bch2_data_job_read(struct file *file, char __user *buf,
-				  size_t len, loff_t *ppos)
-{
-	struct bch_data_ctx *ctx = container_of(file->private_data, struct bch_data_ctx, thr);
-	struct bch_fs *c = ctx->c;
-	struct bch_ioctl_data_event e = {
-		.type			= BCH_DATA_EVENT_PROGRESS,
-		.p.data_type		= ctx->stats.data_type,
-		.p.btree_id		= ctx->stats.pos.btree,
-		.p.pos			= ctx->stats.pos.pos,
-		.p.sectors_done		= atomic64_read(&ctx->stats.sectors_seen),
-		.p.sectors_total	= bch2_fs_usage_read_short(c).used,
-	};
-
-	if (len < sizeof(e))
-		return -EINVAL;
-
-	return copy_to_user_errcode(buf, &e, sizeof(e)) ?: sizeof(e);
-}
-
-static const struct file_operations bcachefs_data_ops = {
-	.release	= bch2_data_job_release,
-	.read		= bch2_data_job_read,
-	.llseek		= no_llseek,
-};
-
-static long bch2_ioctl_data(struct bch_fs *c,
-			    struct bch_ioctl_data arg)
-{
-	struct bch_data_ctx *ctx;
-	int ret;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (arg.op >= BCH_DATA_OP_NR || arg.flags)
-		return -EINVAL;
-
-	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
-	if (!ctx)
-		return -ENOMEM;
-
-	ctx->c = c;
-	ctx->arg = arg;
-
-	ret = bch2_run_thread_with_file(&ctx->thr,
-			&bcachefs_data_ops,
-			bch2_data_thread);
-	if (ret < 0)
-		kfree(ctx);
-	return ret;
-}
-
-static long bch2_ioctl_fs_usage(struct bch_fs *c,
-				struct bch_ioctl_fs_usage __user *user_arg)
-{
-	struct bch_ioctl_fs_usage *arg = NULL;
-	struct bch_replicas_usage *dst_e, *dst_end;
-	struct bch_fs_usage_online *src;
-	u32 replica_entries_bytes;
-	unsigned i;
-	int ret = 0;
-
-	if (!test_bit(BCH_FS_started, &c->flags))
-		return -EINVAL;
-
-	if (get_user(replica_entries_bytes, &user_arg->replica_entries_bytes))
-		return -EFAULT;
-
-	arg = kzalloc(size_add(sizeof(*arg), replica_entries_bytes), GFP_KERNEL);
-	if (!arg)
-		return -ENOMEM;
-
-	src = bch2_fs_usage_read(c);
-	if (!src) {
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	arg->capacity		= c->capacity;
-	arg->used		= bch2_fs_sectors_used(c, src);
-	arg->online_reserved	= src->online_reserved;
-
-	for (i = 0; i < BCH_REPLICAS_MAX; i++)
-		arg->persistent_reserved[i] = src->u.persistent_reserved[i];
-
-	dst_e	= arg->replicas;
-	dst_end = (void *) arg->replicas + replica_entries_bytes;
-
-	for (i = 0; i < c->replicas.nr; i++) {
-		struct bch_replicas_entry_v1 *src_e =
-			cpu_replicas_entry(&c->replicas, i);
-
-		/* check that we have enough space for one replicas entry */
-		if (dst_e + 1 > dst_end) {
-			ret = -ERANGE;
-			break;
-		}
-
-		dst_e->sectors		= src->u.replicas[i];
-		dst_e->r		= *src_e;
-
-		/* recheck after setting nr_devs: */
-		if (replicas_usage_next(dst_e) > dst_end) {
-			ret = -ERANGE;
-			break;
-		}
-
-		memcpy(dst_e->r.devs, src_e->devs, src_e->nr_devs);
-
-		dst_e = replicas_usage_next(dst_e);
-	}
-
-	arg->replica_entries_bytes = (void *) dst_e - (void *) arg->replicas;
-
-	percpu_up_read(&c->mark_lock);
-	kfree(src);
-
-	if (ret)
-		goto err;
-
-	ret = copy_to_user_errcode(user_arg, arg,
-			sizeof(*arg) + arg->replica_entries_bytes);
-err:
-	kfree(arg);
-	return ret;
-}
-
-/* obsolete, didn't allow for new data types: */
-static long bch2_ioctl_dev_usage(struct bch_fs *c,
-				 struct bch_ioctl_dev_usage __user *user_arg)
-{
-	struct bch_ioctl_dev_usage arg;
-	struct bch_dev_usage src;
-	struct bch_dev *ca;
-	unsigned i;
-
-	if (!test_bit(BCH_FS_started, &c->flags))
-		return -EINVAL;
-
-	if (copy_from_user(&arg, user_arg, sizeof(arg)))
-		return -EFAULT;
-
-	if ((arg.flags & ~BCH_BY_INDEX) ||
-	    arg.pad[0] ||
-	    arg.pad[1] ||
-	    arg.pad[2])
-		return -EINVAL;
-
-	ca = bch2_device_lookup(c, arg.dev, arg.flags);
-	if (IS_ERR(ca))
-		return PTR_ERR(ca);
-
-	src = bch2_dev_usage_read(ca);
-
-	arg.state		= ca->mi.state;
-	arg.bucket_size		= ca->mi.bucket_size;
-	arg.nr_buckets		= ca->mi.nbuckets - ca->mi.first_bucket;
-
-	for (i = 0; i < BCH_DATA_NR; i++) {
-		arg.d[i].buckets	= src.d[i].buckets;
-		arg.d[i].sectors	= src.d[i].sectors;
-		arg.d[i].fragmented	= src.d[i].fragmented;
-	}
-
-	percpu_ref_put(&ca->ref);
-
-	return copy_to_user_errcode(user_arg, &arg, sizeof(arg));
-}
-
-static long bch2_ioctl_dev_usage_v2(struct bch_fs *c,
-				 struct bch_ioctl_dev_usage_v2 __user *user_arg)
-{
-	struct bch_ioctl_dev_usage_v2 arg;
-	struct bch_dev_usage src;
-	struct bch_dev *ca;
-	int ret = 0;
-
-	if (!test_bit(BCH_FS_started, &c->flags))
-		return -EINVAL;
-
-	if (copy_from_user(&arg, user_arg, sizeof(arg)))
-		return -EFAULT;
-
-	if ((arg.flags & ~BCH_BY_INDEX) ||
-	    arg.pad[0] ||
-	    arg.pad[1] ||
-	    arg.pad[2])
-		return -EINVAL;
-
-	ca = bch2_device_lookup(c, arg.dev, arg.flags);
-	if (IS_ERR(ca))
-		return PTR_ERR(ca);
-
-	src = bch2_dev_usage_read(ca);
-
-	arg.state		= ca->mi.state;
-	arg.bucket_size		= ca->mi.bucket_size;
-	arg.nr_data_types	= min(arg.nr_data_types, BCH_DATA_NR);
-	arg.nr_buckets		= ca->mi.nbuckets - ca->mi.first_bucket;
-
-	ret = copy_to_user_errcode(user_arg, &arg, sizeof(arg));
-	if (ret)
-		goto err;
-
-	for (unsigned i = 0; i < arg.nr_data_types; i++) {
-		struct bch_ioctl_dev_usage_type t = {
-			.buckets	= src.d[i].buckets,
-			.sectors	= src.d[i].sectors,
-			.fragmented	= src.d[i].fragmented,
-		};
-
-		ret = copy_to_user_errcode(&user_arg->d[i], &t, sizeof(t));
-		if (ret)
-			goto err;
-	}
-err:
-	percpu_ref_put(&ca->ref);
-	return ret;
-}
-
-static long bch2_ioctl_read_super(struct bch_fs *c,
-				  struct bch_ioctl_read_super arg)
-{
-	struct bch_dev *ca = NULL;
-	struct bch_sb *sb;
-	int ret = 0;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if ((arg.flags & ~(BCH_BY_INDEX|BCH_READ_DEV)) ||
-	    arg.pad)
-		return -EINVAL;
-
-	mutex_lock(&c->sb_lock);
-
-	if (arg.flags & BCH_READ_DEV) {
-		ca = bch2_device_lookup(c, arg.dev, arg.flags);
-
-		if (IS_ERR(ca)) {
-			ret = PTR_ERR(ca);
-			goto err;
-		}
-
-		sb = ca->disk_sb.sb;
-	} else {
-		sb = c->disk_sb.sb;
-	}
-
-	if (vstruct_bytes(sb) > arg.size) {
-		ret = -ERANGE;
-		goto err;
-	}
-
-	ret = copy_to_user_errcode((void __user *)(unsigned long)arg.sb, sb,
-				   vstruct_bytes(sb));
-err:
-	if (!IS_ERR_OR_NULL(ca))
-		percpu_ref_put(&ca->ref);
-	mutex_unlock(&c->sb_lock);
-	return ret;
-}
-
-static long bch2_ioctl_disk_get_idx(struct bch_fs *c,
-				    struct bch_ioctl_disk_get_idx arg)
-{
-	dev_t dev = huge_decode_dev(arg.dev);
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (!dev)
-		return -EINVAL;
-
-	for_each_online_member(c, ca)
-		if (ca->dev == dev) {
-			percpu_ref_put(&ca->io_ref);
-			return ca->dev_idx;
-		}
-
-	return -BCH_ERR_ENOENT_dev_idx_not_found;
-}
-
-static long bch2_ioctl_disk_resize(struct bch_fs *c,
-				   struct bch_ioctl_disk_resize arg)
-{
-	struct bch_dev *ca;
-	int ret;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if ((arg.flags & ~BCH_BY_INDEX) ||
-	    arg.pad)
-		return -EINVAL;
-
-	ca = bch2_device_lookup(c, arg.dev, arg.flags);
-	if (IS_ERR(ca))
-		return PTR_ERR(ca);
-
-	ret = bch2_dev_resize(c, ca, arg.nbuckets);
-
-	percpu_ref_put(&ca->ref);
-	return ret;
-}
-
-static long bch2_ioctl_disk_resize_journal(struct bch_fs *c,
-				   struct bch_ioctl_disk_resize_journal arg)
-{
-	struct bch_dev *ca;
-	int ret;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if ((arg.flags & ~BCH_BY_INDEX) ||
-	    arg.pad)
-		return -EINVAL;
-
-	if (arg.nbuckets > U32_MAX)
-		return -EINVAL;
-
-	ca = bch2_device_lookup(c, arg.dev, arg.flags);
-	if (IS_ERR(ca))
-		return PTR_ERR(ca);
-
-	ret = bch2_set_nr_journal_buckets(c, ca, arg.nbuckets);
-
-	percpu_ref_put(&ca->ref);
-	return ret;
-}
-
-static int bch2_fsck_online_thread_fn(void *arg)
-{
-	struct fsck_thread *thr = container_of(arg, struct fsck_thread, thr);
-	struct bch_fs *c = thr->c;
-
-	c->stdio_filter = current;
-	c->stdio = &thr->thr.stdio;
-
-	/*
-	 * XXX: can we figure out a way to do this without mucking with c->opts?
-	 */
-	unsigned old_fix_errors = c->opts.fix_errors;
-	if (opt_defined(thr->opts, fix_errors))
-		c->opts.fix_errors = thr->opts.fix_errors;
-	else
-		c->opts.fix_errors = FSCK_FIX_ask;
-
-	c->opts.fsck = true;
-	set_bit(BCH_FS_fsck_running, &c->flags);
-
-	c->curr_recovery_pass = BCH_RECOVERY_PASS_check_alloc_info;
-	int ret = bch2_run_online_recovery_passes(c);
-
-	clear_bit(BCH_FS_fsck_running, &c->flags);
-	bch_err_fn(c, ret);
-
-	c->stdio = NULL;
-	c->stdio_filter = NULL;
-	c->opts.fix_errors = old_fix_errors;
-
-	thread_with_stdio_done(&thr->thr);
-
-	up(&c->online_fsck_mutex);
-	bch2_ro_ref_put(c);
-	return 0;
-}
-
-static long bch2_ioctl_fsck_online(struct bch_fs *c,
-				   struct bch_ioctl_fsck_online arg)
-{
-	struct fsck_thread *thr = NULL;
-	long ret = 0;
-
-	if (arg.flags)
-		return -EINVAL;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (!bch2_ro_ref_tryget(c))
-		return -EROFS;
-
-	if (down_trylock(&c->online_fsck_mutex)) {
-		bch2_ro_ref_put(c);
-		return -EAGAIN;
-	}
-
-	thr = kzalloc(sizeof(*thr), GFP_KERNEL);
-	if (!thr) {
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	thr->c = c;
-	thr->opts = bch2_opts_empty();
-
-	if (arg.opts) {
-		char *optstr = strndup_user((char __user *)(unsigned long) arg.opts, 1 << 16);
-
-		ret =   PTR_ERR_OR_ZERO(optstr) ?:
-			bch2_parse_mount_opts(c, &thr->opts, optstr);
-		kfree(optstr);
-
-		if (ret)
-			goto err;
-	}
-
-	ret = bch2_run_thread_with_stdio(&thr->thr,
-			bch2_fsck_thread_exit,
-			bch2_fsck_online_thread_fn);
-err:
-	if (ret < 0) {
-		bch_err_fn(c, ret);
-		if (thr)
-			bch2_fsck_thread_exit(&thr->thr);
-		up(&c->online_fsck_mutex);
-		bch2_ro_ref_put(c);
-	}
-	return ret;
-}
-
-#define BCH_IOCTL(_name, _argtype)					\
-do {									\
-	_argtype i;							\
-									\
-	if (copy_from_user(&i, arg, sizeof(i)))				\
-		return -EFAULT;						\
-	ret = bch2_ioctl_##_name(c, i);					\
-	goto out;							\
-} while (0)
-
-long bch2_fs_ioctl(struct bch_fs *c, unsigned cmd, void __user *arg)
-{
-	long ret;
-
-	switch (cmd) {
-	case BCH_IOCTL_QUERY_UUID:
-		return bch2_ioctl_query_uuid(c, arg);
-	case BCH_IOCTL_FS_USAGE:
-		return bch2_ioctl_fs_usage(c, arg);
-	case BCH_IOCTL_DEV_USAGE:
-		return bch2_ioctl_dev_usage(c, arg);
-	case BCH_IOCTL_DEV_USAGE_V2:
-		return bch2_ioctl_dev_usage_v2(c, arg);
-#if 0
-	case BCH_IOCTL_START:
-		BCH_IOCTL(start, struct bch_ioctl_start);
-	case BCH_IOCTL_STOP:
-		return bch2_ioctl_stop(c);
-#endif
-	case BCH_IOCTL_READ_SUPER:
-		BCH_IOCTL(read_super, struct bch_ioctl_read_super);
-	case BCH_IOCTL_DISK_GET_IDX:
-		BCH_IOCTL(disk_get_idx, struct bch_ioctl_disk_get_idx);
-	}
-
-	if (!test_bit(BCH_FS_started, &c->flags))
-		return -EINVAL;
-
-	switch (cmd) {
-	case BCH_IOCTL_DISK_ADD:
-		BCH_IOCTL(disk_add, struct bch_ioctl_disk);
-	case BCH_IOCTL_DISK_REMOVE:
-		BCH_IOCTL(disk_remove, struct bch_ioctl_disk);
-	case BCH_IOCTL_DISK_ONLINE:
-		BCH_IOCTL(disk_online, struct bch_ioctl_disk);
-	case BCH_IOCTL_DISK_OFFLINE:
-		BCH_IOCTL(disk_offline, struct bch_ioctl_disk);
-	case BCH_IOCTL_DISK_SET_STATE:
-		BCH_IOCTL(disk_set_state, struct bch_ioctl_disk_set_state);
-	case BCH_IOCTL_DATA:
-		BCH_IOCTL(data, struct bch_ioctl_data);
-	case BCH_IOCTL_DISK_RESIZE:
-		BCH_IOCTL(disk_resize, struct bch_ioctl_disk_resize);
-	case BCH_IOCTL_DISK_RESIZE_JOURNAL:
-		BCH_IOCTL(disk_resize_journal, struct bch_ioctl_disk_resize_journal);
-	case BCH_IOCTL_FSCK_ONLINE:
-		BCH_IOCTL(fsck_online, struct bch_ioctl_fsck_online);
-	default:
-		return -ENOTTY;
-	}
-out:
-	if (ret < 0)
-		ret = bch2_err_class(ret);
-	return ret;
-}
-
-static DEFINE_IDR(bch_chardev_minor);
-
-static long bch2_chardev_ioctl(struct file *filp, unsigned cmd, unsigned long v)
-{
-	unsigned minor = iminor(file_inode(filp));
-	struct bch_fs *c = minor < U8_MAX ? idr_find(&bch_chardev_minor, minor) : NULL;
-	void __user *arg = (void __user *) v;
-
-	return c
-		? bch2_fs_ioctl(c, cmd, arg)
-		: bch2_global_ioctl(cmd, arg);
-}
-
-static const struct file_operations bch_chardev_fops = {
-	.owner		= THIS_MODULE,
-	.unlocked_ioctl = bch2_chardev_ioctl,
-	.open		= nonseekable_open,
-};
-
-static int bch_chardev_major;
-static struct class *bch_chardev_class;
-static struct device *bch_chardev;
-
-void bch2_fs_chardev_exit(struct bch_fs *c)
-{
-	if (!IS_ERR_OR_NULL(c->chardev))
-		device_unregister(c->chardev);
-	if (c->minor >= 0)
-		idr_remove(&bch_chardev_minor, c->minor);
-}
-
-int bch2_fs_chardev_init(struct bch_fs *c)
-{
-	c->minor = idr_alloc(&bch_chardev_minor, c, 0, 0, GFP_KERNEL);
-	if (c->minor < 0)
-		return c->minor;
-
-	c->chardev = device_create(bch_chardev_class, NULL,
-				   MKDEV(bch_chardev_major, c->minor), c,
-				   "bcachefs%u-ctl", c->minor);
-	if (IS_ERR(c->chardev))
-		return PTR_ERR(c->chardev);
-
-	return 0;
-}
-
-void bch2_chardev_exit(void)
-{
-	if (!IS_ERR_OR_NULL(bch_chardev_class))
-		device_destroy(bch_chardev_class,
-			       MKDEV(bch_chardev_major, U8_MAX));
-	if (!IS_ERR_OR_NULL(bch_chardev_class))
-		class_destroy(bch_chardev_class);
-	if (bch_chardev_major > 0)
-		unregister_chrdev(bch_chardev_major, "bcachefs");
-}
-
-int __init bch2_chardev_init(void)
-{
-	bch_chardev_major = register_chrdev(0, "bcachefs-ctl", &bch_chardev_fops);
-	if (bch_chardev_major < 0)
-		return bch_chardev_major;
-
-	bch_chardev_class = class_create("bcachefs");
-	if (IS_ERR(bch_chardev_class))
-		return PTR_ERR(bch_chardev_class);
-
-	bch_chardev = device_create(bch_chardev_class, NULL,
-				    MKDEV(bch_chardev_major, U8_MAX),
-				    NULL, "bcachefs-ctl");
-	if (IS_ERR(bch_chardev))
-		return PTR_ERR(bch_chardev);
-
-	return 0;
-}
-
-#endif /* NO_BCACHEFS_CHARDEV */