Re: mass storage error reporting

[Yauheni Kaliuta <yauheni@xxxxxxxxxxx>]

Hi!

On Tue, Jan 25, 2011 at 10:02 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
> On Tue, 25 Jan 2011, Yauheni Kaliuta wrote:
>
>> Hi!
>>
>> file_storage.c has the following code in do_write():

[...]

>> Â Â Â Â Â Â Â Â Â Â Â Â /* If an error occurred, report it and its position */
>> Â Â Â Â Â Â Â Â Â Â Â Â if (nwritten < amount) {
>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â curlun->sense_data = SS_WRITE_ERROR;
>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â curlun->sense_data_info = file_offset >> 9;
>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â curlun->info_valid = 1;
>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â break;
>> Â Â Â Â Â Â Â Â Â Â Â Â }
>>
>> In case of some data written (nwritten > 0), shouldn't it try to write
>> the rest before error reporting?
>
> In theory, perhaps it should. ÂI haven't run across any situations
> where nwritten was > 0 and < amount. ÂLikewise with reading.
>

Well, I'm lucky enough to get it :) Not with the upstream code,
however, but with custom read/write functions (which avoid vfs layer).
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