forked from Minki/linux
Btrfs: reserve sufficient space for ioctl clone
Fix a crash/BUG_ON in the clone ioctl due to insufficient reservation. We need to reserve space for: - adjusting the old extent (possibly splitting it) - adding the new extent - updating the inode Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -2336,7 +2336,12 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
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else
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new_key.offset = destoff;
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trans = btrfs_start_transaction(root, 1);
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/*
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* 1 - adjusting old extent (we may have to split it)
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* 1 - add new extent
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* 1 - inode update
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*/
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trans = btrfs_start_transaction(root, 3);
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if (IS_ERR(trans)) {
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ret = PTR_ERR(trans);
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goto out;
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