return copy_to_user(to, from, n) ? -EFAULT : 0;
}
+struct thread_with_file {
+ struct task_struct *task;
+ int ret;
+};
+
+static void thread_with_file_exit(struct thread_with_file *thr)
+{
+ if (thr->task) {
+ kthread_stop(thr->task);
+ put_task_struct(thr->task);
+ }
+}
+
+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)
}
#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 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;
+
+ ret = wait_event_interruptible(thr->output.wait,
+ thr->output.buf.pos || thr->output2.nr);
+ if (ret)
+ return ret;
+
+ 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 const struct file_operations fsck_thread_ops = {
+ .release = bch2_fsck_thread_release,
+ .read = bch2_fsck_thread_read,
+ .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);
+ 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 (!(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->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:
case BCH_IOCTL_INCREMENTAL:
return bch2_ioctl_incremental(arg);
#endif
+ case BCH_IOCTL_FSCK_OFFLINE: {
+ ret = bch2_ioctl_fsck_offline(arg);
+ break;
+ }
default:
- return -ENOTTY;
+ 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_data_ctx {
+ struct thread_with_file thr;
+
struct bch_fs *c;
struct bch_ioctl_data arg;
struct bch_move_stats stats;
-
- int ret;
-
- struct task_struct *thread;
};
static int bch2_data_thread(void *arg)
{
- struct bch_data_ctx *ctx = arg;
-
- ctx->ret = bch2_data_job(ctx->c, &ctx->stats, ctx->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 = file->private_data;
+ struct bch_data_ctx *ctx = container_of(file->private_data, struct bch_data_ctx, thr);
- kthread_stop(ctx->thread);
- put_task_struct(ctx->thread);
+ 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 = file->private_data;
+ 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,
static long bch2_ioctl_data(struct bch_fs *c,
struct bch_ioctl_data arg)
{
- struct bch_data_ctx *ctx = NULL;
- struct file *file = NULL;
- unsigned flags = O_RDONLY|O_CLOEXEC|O_NONBLOCK;
- int ret, fd = -1;
+ struct bch_data_ctx *ctx;
+ int ret;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
ctx->c = c;
ctx->arg = arg;
- ctx->thread = kthread_create(bch2_data_thread, ctx,
- "bch-data/%s", c->name);
- if (IS_ERR(ctx->thread)) {
- ret = PTR_ERR(ctx->thread);
- goto err;
- }
-
- ret = get_unused_fd_flags(flags);
+ ret = run_thread_with_file(&ctx->thr,
+ &bcachefs_data_ops,
+ bch2_data_thread,
+ "bch-data/%s", c->name);
if (ret < 0)
- goto err;
- fd = ret;
-
- file = anon_inode_getfile("[bcachefs]", &bcachefs_data_ops, ctx, flags);
- if (IS_ERR(file)) {
- ret = PTR_ERR(file);
- goto err;
- }
-
- fd_install(fd, file);
-
- get_task_struct(ctx->thread);
- wake_up_process(ctx->thread);
-
- return fd;
-err:
- if (fd >= 0)
- put_unused_fd(fd);
- if (!IS_ERR_OR_NULL(ctx->thread))
- kthread_stop(ctx->thread);
- kfree(ctx);
+ kfree(ctx);
return ret;
}
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;
+#if 0
+ 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);
+#endif
+ 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;
+
+ thr = kzalloc(sizeof(*thr), GFP_KERNEL);
+ if (!thr)
+ return -ENOMEM;
+
+ thr->c = c;
+ thr->output.buf = PRINTBUF;
+ thr->output.buf.atomic++;
+ spin_lock_init(&thr->output.lock);
+ init_waitqueue_head(&thr->output.wait);
+ darray_init(&thr->output2);
+
+ ret = run_thread_with_file(&thr->thr,
+ &fsck_thread_ops,
+ bch2_fsck_online_thread_fn,
+ "bch-fsck");
+ bch_err_fn(c, ret);
+ if (ret < 0)
+ bch2_fsck_thread_free(thr);
+ return ret;
+}
+
#define BCH_IOCTL(_name, _argtype) \
do { \
_argtype i; \
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;
}
projects / bcachefs-tools-debian / blobdiff