From 54dbc15172375641ef03399e8f911d7165eb90fb Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Sat, 19 Dec 2015 00:55:59 -0800 Subject: vfs: hoist the btrfs deduplication ioctl to the vfs Hoist the btrfs EXTENT_SAME ioctl up to the VFS and make the name more systematic (FIDEDUPERANGE). Signed-off-by: Darrick J. Wong Signed-off-by: Al Viro --- fs/ioctl.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'fs/ioctl.c') diff --git a/fs/ioctl.c b/fs/ioctl.c index 84c6e79829ab..fcdd33b7ec78 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -568,6 +568,41 @@ static int ioctl_fsthaw(struct file *filp) return thaw_super(sb); } +static long ioctl_file_dedupe_range(struct file *file, void __user *arg) +{ + struct file_dedupe_range __user *argp = arg; + struct file_dedupe_range *same = NULL; + int ret; + unsigned long size; + u16 count; + + if (get_user(count, &argp->dest_count)) { + ret = -EFAULT; + goto out; + } + + size = offsetof(struct file_dedupe_range __user, info[count]); + + same = memdup_user(argp, size); + if (IS_ERR(same)) { + ret = PTR_ERR(same); + same = NULL; + goto out; + } + + ret = vfs_dedupe_file_range(file, same); + if (ret) + goto out; + + ret = copy_to_user(argp, same, size); + if (ret) + ret = -EFAULT; + +out: + kfree(same); + return ret; +} + /* * When you add any new common ioctls to the switches above and below * please update compat_sys_ioctl() too. @@ -629,6 +664,9 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, case FICLONERANGE: return ioctl_file_clone_range(filp, argp); + case FIDEDUPERANGE: + return ioctl_file_dedupe_range(filp, argp); + default: if (S_ISREG(inode->i_mode)) error = file_ioctl(filp, cmd, arg); -- cgit v1.2.3