diff options
Diffstat (limited to 'fs/fuse/dev.c')
| -rw-r--r-- | fs/fuse/dev.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index eba68b57bd7c..5a5fb56deb92 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -2283,6 +2283,41 @@ static long fuse_dev_ioctl_clone(struct file *file, __u32 __user *argp) return res; } +static long fuse_dev_ioctl_backing_open(struct file *file, + struct fuse_backing_map __user *argp) +{ + struct fuse_dev *fud = fuse_get_dev(file); + struct fuse_backing_map map; + + if (!fud) + return -EPERM; + + if (!IS_ENABLED(CONFIG_FUSE_PASSTHROUGH)) + return -EOPNOTSUPP; + + if (copy_from_user(&map, argp, sizeof(map))) + return -EFAULT; + + return fuse_backing_open(fud->fc, &map); +} + +static long fuse_dev_ioctl_backing_close(struct file *file, __u32 __user *argp) +{ + struct fuse_dev *fud = fuse_get_dev(file); + int backing_id; + + if (!fud) + return -EPERM; + + if (!IS_ENABLED(CONFIG_FUSE_PASSTHROUGH)) + return -EOPNOTSUPP; + + if (get_user(backing_id, argp)) + return -EFAULT; + + return fuse_backing_close(fud->fc, backing_id); +} + static long fuse_dev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -2292,6 +2327,12 @@ static long fuse_dev_ioctl(struct file *file, unsigned int cmd, case FUSE_DEV_IOC_CLONE: return fuse_dev_ioctl_clone(file, argp); + case FUSE_DEV_IOC_BACKING_OPEN: + return fuse_dev_ioctl_backing_open(file, argp); + + case FUSE_DEV_IOC_BACKING_CLOSE: + return fuse_dev_ioctl_backing_close(file, argp); + default: return -ENOTTY; } |