From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Gregory Maxwell" Subject: Re: Checksum and transform layering Date: Thu, 6 Nov 2008 10:43:15 -0500 Message-ID: References: <1225982445.15281.15.camel@think.oraclecorp.com> <20081106152729.GN29514@jeru.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Cc: linux-btrfs@vger.kernel.org To: nicollet@jeru.org Return-path: In-Reply-To: <20081106152729.GN29514@jeru.org> List-ID: T24gVGh1LCBOb3YgNiwgMjAwOCBhdCAxMDoyNyBBTSwgWGF2aWVyIE5pY29sbGV0IDxuaWNvbGxl dEBqZXJ1Lm9yZz4gd3JvdGU6Cj4gTGUgMDYgbm92ZW1icmUgMjAwOCDDoCAwOTo1OCwgR3JlZ29y eSBNYXh3ZWxsIGEgw6ljcml0Ogo+PiBUaGUgbGF0dGVyIHdvdWxkIG5lZWQgdG8gYmUgYSBwcm9i YWJseSBuZWVkIHRvIGJlIGEgc2VjcmV0LWtleWVkIEhNQUMKPj4gdG8gcHJldmVudCB3YXRlcm1h cmtpbmcgYXR0YWNrcyBhbmQgaW5mb3JtYXRpb24gbGVha2FnZSwgWy4uLl0KPgo+IERtLWNyeXB0 IG9uIGV2ZXJ5IGRpc2tzIHNlZW1zIGEgZ29vZCBhbHRlcm5hdGl2ZSwgZG9lc24ndCBpdCA/Cj4g WW91IHdvdWxkIHVzZSBkbS1jcnlwdCBmb3IgeW91ciBzd2FwIGFueXdheS4KPgo+IERpZCBJIG1p c3Mgc29tZXRoaW5nID8KCkRtY3J5cHQgaXMgZmluZSBidXQgYSByYXRoZXIgYmx1bnQgdG9vbDog SXQncyBhbGwgb3Igbm90aGluZywgYW5kIG9ubHkKYSBzaW5nbGUga2V5LiAgSXQgYWxzbyBjYW4g bm90IHN0b3JlIGEgdW5pcXVlIG5vbmNlIHBlciBibG9jayB1cGRhdGUsCndoaWNoIG1heSBjcmVh dGUgc29tZSAodGhlb3JldGljYWwpIHNlY3VyaXR5IHdlYWtuZXNzZXMuICBUaGUgd2hvbGUKdGhp bmcgd2lsbCBuZWVkIHRvIGJlIG1vdW50ZWQgd2l0aCBrZXlzIGluIG1lbW9yeSBldmVuIHdoZW4g eW91IG9ubHkKY2FyZSBhYm91dCBhIGZldyBmaWxlcy4gKHNvIHNvbWVvbmUgd2hvIGdhaW5zIGFj Y2VzcyB0byB0aGUgc3lzdGVtCmNvdWxkIGFjY2VzcyBoaWdoIHNlY3VyaXR5IGZpbGVzIGV2ZW4g aWYgdGhlIHN5c3RlbSB3YXMganVzdCBiZWluZwp1c2VkIGZvciB3ZWItYnJvd3NpbmcgYXQgdGhl IHRpbWUpCgpXaXRoIGEgbW9yZSBpbnRlbGxpZ2VudCB5b3UgY291bGQgaGF2ZSBwZXItc3Vidm9s dW1lIGtleWluZywgb3IgZXZlbgpiZXR0ZXIgcGVyLWZpbGUgYWxsb3dpbmcgdGhlIGVuY3J5cHRl ZCBmaWxlc3lzdGVtIHRvIGNvbnRhaW4gYSBtaXggb2YKZmlsZXMgd2l0aCBkaWZmZXJpbmcgc2Vj dXJpdHkgY2xhc3Nlcy4KClRha2UgYSBsb29rIGF0IGh0dHA6Ly9lY3J5cHRmcy5zb3VyY2Vmb3Jn ZS5uZXQvIGZvciBhbiBleGFtcGxlIG9mIGEKbW9yZS1zb3BoaXN0aWNhdGVkIGZpbGVzeXN0ZW0g ZW5jcnlwdGlvbiBmZWF0dXJlIHNldC4KCkF0IHRoZSBsZWFzdCBJIHRoaW5rIGl0IHdvdWxkIGJl IHVzZWZ1bCBpZiBidHJmcyBwcm92aWRlZCBkbWNyeXB0CmZ1bmN0aW9uYWxpdHkgcGVyIHN1YnZv bHVtZSwgdGhvdWdoIGZ1bGwgZWNyeXB0ZnMgbGV2ZWwgZnVuY3Rpb25hbGl0eQp3b3VsZCBiZSBx dWl0ZSBpbnRlcmVzdGluZy4K