Hello,
I'm playing around with the BTRFS_IOC_SEARCH_TREE to extract the csums
of the physical blocks. During the tests some item_header had len = 0,
which indicates the buffer was to small to hold the item. I added a
printk into the kernel to get the original size of the item and it was
around 6600 bytes. Is there another way to get the item? Otherwise I
would suggest to create an ioctl, which is a little bit more flexible,
something like
struct btrfs_ioctl_search_args2 {
struct btrfs_ioctl_search_key key;
__u64 buf_len
char buf[0];
};
Gerhard
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