From de322263d3a6d4ffd4ed7c4d0c6536e9497aec9b Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Mon, 16 Jan 2012 22:04:49 +0200 Subject: Btrfs: allow for resuming restriper after it was paused Recognize BTRFS_BALANCE_RESUME flag passed from userspace. We use the same heuristics used when recovering balance after a crash to try to start where we left off last time. Signed-off-by: Ilya Dryomov --- fs/btrfs/ioctl.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'fs') diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 60852217ce9a..85e546ffe3c7 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3106,6 +3106,20 @@ static long btrfs_ioctl_balance(struct btrfs_root *root, void __user *arg) ret = PTR_ERR(bargs); goto out; } + + if (bargs->flags & BTRFS_BALANCE_RESUME) { + if (!fs_info->balance_ctl) { + ret = -ENOTCONN; + goto out_bargs; + } + + bctl = fs_info->balance_ctl; + spin_lock(&fs_info->balance_lock); + bctl->flags |= BTRFS_BALANCE_RESUME; + spin_unlock(&fs_info->balance_lock); + + goto do_balance; + } } else { bargs = NULL; } @@ -3133,6 +3147,7 @@ static long btrfs_ioctl_balance(struct btrfs_root *root, void __user *arg) bctl->flags |= BTRFS_BALANCE_TYPE_MASK; } +do_balance: ret = btrfs_balance(bctl, bargs); /* * bctl is freed in __cancel_balance or in free_fs_info if -- cgit v1.2.3