+++ /dev/null
-// 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 <linux/anon_inodes.h>
-#include <linux/cdev.h>
-#include <linux/device.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/ioctl.h>
-#include <linux/kthread.h>
-#include <linux/major.h>
-#include <linux/poll.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;
-}
-
-struct thread_with_file {
- struct task_struct *task;
- int ret;
- bool done;
-};
-
-static void thread_with_file_exit(struct thread_with_file *thr)
-{
- if (thr->task) {
- kthread_stop(thr->task);
- put_task_struct(thr->task);
- }
-}
-
-__printf(4, 0)
-static int run_thread_with_file(struct thread_with_file *thr,
- const struct file_operations *fops,
- int (*fn)(void *), const char *fmt, ...)
-{
- va_list args;
- struct file *file = NULL;
- int ret, fd = -1;
- struct printbuf name = PRINTBUF;
- unsigned fd_flags = O_RDONLY|O_CLOEXEC|O_NONBLOCK;
-
- va_start(args, fmt);
- prt_vprintf(&name, fmt, args);
- va_end(args);
-
- thr->ret = 0;
- thr->task = kthread_create(fn, thr, name.buf);
- ret = PTR_ERR_OR_ZERO(thr->task);
- if (ret)
- goto err;
-
- ret = get_unused_fd_flags(fd_flags);
- if (ret < 0)
- goto err_stop_task;
- fd = ret;
-
- file = anon_inode_getfile(name.buf, fops, thr, fd_flags);
- ret = PTR_ERR_OR_ZERO(file);
- if (ret)
- goto err_put_fd;
-
- fd_install(fd, file);
- get_task_struct(thr->task);
- wake_up_process(thr->task);
- printbuf_exit(&name);
- return fd;
-err_put_fd:
- put_unused_fd(fd);
-err_stop_task:
- kthread_stop(thr->task);
-err:
- printbuf_exit(&name);
- return ret;
-}
-
-/* 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_file thr;
- struct printbuf buf;
- struct bch_fs *c;
- char **devs;
- size_t nr_devs;
- struct bch_opts opts;
-
- struct log_output output;
- DARRAY(char) output2;
-};
-
-static void bch2_fsck_thread_free(struct fsck_thread *thr)
-{
- thread_with_file_exit(&thr->thr);
- if (thr->devs)
- for (size_t i = 0; i < thr->nr_devs; i++)
- kfree(thr->devs[i]);
- darray_exit(&thr->output2);
- printbuf_exit(&thr->output.buf);
- kfree(thr->devs);
- kfree(thr);
-}
-
-static int bch2_fsck_thread_release(struct inode *inode, struct file *file)
-{
- struct fsck_thread *thr = container_of(file->private_data, struct fsck_thread, thr);
-
- bch2_fsck_thread_free(thr);
- return 0;
-}
-
-static bool fsck_thread_ready(struct fsck_thread *thr)
-{
- return thr->output.buf.pos ||
- thr->output2.nr ||
- thr->thr.done;
-}
-
-static ssize_t bch2_fsck_thread_read(struct file *file, char __user *buf,
- size_t len, loff_t *ppos)
-{
- struct fsck_thread *thr = container_of(file->private_data, struct fsck_thread, thr);
- size_t copied = 0, b;
- int ret = 0;
-
- if ((file->f_flags & O_NONBLOCK) &&
- !fsck_thread_ready(thr))
- return -EAGAIN;
-
- ret = wait_event_interruptible(thr->output.wait,
- fsck_thread_ready(thr));
- if (ret)
- return ret;
-
- if (thr->thr.done)
- return 0;
-
- while (len) {
- ret = darray_make_room(&thr->output2, thr->output.buf.pos);
- if (ret)
- break;
-
- spin_lock_irq(&thr->output.lock);
- b = min_t(size_t, darray_room(thr->output2), thr->output.buf.pos);
-
- memcpy(&darray_top(thr->output2), thr->output.buf.buf, b);
- memmove(thr->output.buf.buf,
- thr->output.buf.buf + b,
- thr->output.buf.pos - b);
-
- thr->output2.nr += b;
- thr->output.buf.pos -= b;
- spin_unlock_irq(&thr->output.lock);
-
- b = min(len, thr->output2.nr);
- if (!b)
- break;
-
- b -= copy_to_user(buf, thr->output2.data, b);
- if (!b) {
- ret = -EFAULT;
- break;
- }
-
- copied += b;
- buf += b;
- len -= b;
-
- memmove(thr->output2.data,
- thr->output2.data + b,
- thr->output2.nr - b);
- thr->output2.nr -= b;
- }
-
- return copied ?: ret;
-}
-
-static __poll_t bch2_fsck_thread_poll(struct file *file, struct poll_table_struct *wait)
-{
- struct fsck_thread *thr = container_of(file->private_data, struct fsck_thread, thr);
-
- poll_wait(file, &thr->output.wait, wait);
-
- return fsck_thread_ready(thr)
- ? EPOLLIN|EPOLLHUP
- : 0;
-}
-
-static const struct file_operations fsck_thread_ops = {
- .release = bch2_fsck_thread_release,
- .read = bch2_fsck_thread_read,
- .poll = bch2_fsck_thread_poll,
- .llseek = no_llseek,
-};
-
-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.ret = PTR_ERR_OR_ZERO(c);
- if (!thr->thr.ret)
- bch2_fs_stop(c);
-
- thr->thr.done = true;
- wake_up(&thr->output.wait);
- 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;
- thr->output.buf = PRINTBUF;
- thr->output.buf.atomic++;
- spin_lock_init(&thr->output.lock);
- init_waitqueue_head(&thr->output.wait);
- darray_init(&thr->output2);
-
- if (copy_from_user(devs, &user_arg->devs[0], 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, log_output, (u64)(unsigned long)&thr->output);
-
- ret = run_thread_with_file(&thr->thr,
- &fsck_thread_ops,
- bch2_fsck_offline_thread_fn,
- "bch-fsck");
-err:
- if (ret < 0) {
- if (thr)
- bch2_fsck_thread_free(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);
-
- 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 = run_thread_with_file(&ctx->thr,
- &bcachefs_data_ops,
- bch2_data_thread,
- "bch-data/%s", c->name);
- 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);
- struct bch_dev *ca;
- unsigned i;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- if (!dev)
- return -EINVAL;
-
- for_each_online_member(ca, c, i)
- if (ca->dev == dev) {
- percpu_ref_put(&ca->io_ref);
- return i;
- }
-
- 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->output_filter = current;
- c->output = &thr->output;
-
- /*
- * XXX: can we figure out a way to do this without mucking with c->opts?
- */
- if (opt_defined(thr->opts, fix_errors))
- c->opts.fix_errors = thr->opts.fix_errors;
- c->opts.fsck = true;
-
- c->curr_recovery_pass = BCH_RECOVERY_PASS_check_alloc_info;
- bch2_run_online_recovery_passes(c);
-
- c->output = NULL;
- c->output_filter = NULL;
-
- thr->thr.done = true;
- wake_up(&thr->output.wait);
-
- 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();
- thr->output.buf = PRINTBUF;
- thr->output.buf.atomic++;
- spin_lock_init(&thr->output.lock);
- init_waitqueue_head(&thr->output.wait);
- darray_init(&thr->output2);
-
- 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 = run_thread_with_file(&thr->thr,
- &fsck_thread_ops,
- bch2_fsck_online_thread_fn,
- "bch-fsck");
-err:
- if (ret < 0) {
- bch_err_fn(c, ret);
- if (thr)
- bch2_fsck_thread_free(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 */
projects / bcachefs-tools-debian / blobdiff