Absolutely. We will try it first thing in the morning.
Thanks again,
-BKG
Sent from my iPhone (Please excuse any typos)
On Apr 17, 2012, at 8:24 PM, "FUJITA Tomonori" <fujita.tomonori at lab.ntt.co.jp> wrote:
> CC'ed Brad,
>
> Can you try the patch?
>
> Thanks,
>
> On Wed, 18 Apr 2012 01:17:35 +0300
> nezhinsky at gmail.com wrote:
>
>> From: Alexander Nezhinsky <alexandern at mellanox.com>
>>
>> This patch hopefully fixes the problem reported by Brad. Please verify.
>>
>> 1) mtask->done is reset to 0 when transitioning to MTASK_STATE_PDU_SEND because it is used
>> as the offset into concat_buf, while rsp->len accounts for the total response length, incl. the header;
>> thus the check if the entire mtask resp is sent should subtract header len.
>> 2) when writing concat_buf to a socket file, if the buffer offset is past the buffer end,
>> return -1 and set errno=EINVAL instead of just returning 0.
>> The problem is that concat_write() regularly returns the retcode from write(), which is either
>> the number of written bytes or -1 (and then errno describes the error). Thus when we avoid
>> calling write() the same convention should be simulated.
>> Similar fix in case of a previous error, then concat_buf->err stores the relevant errno,
>> so -1 is returned and errno is reset to the error code.
>>
>> Signed-off-by: Alexander Nezhinsky <alexandern at mellanox.com>
>> ---
>> usr/concat_buf.c | 12 ++++++++----
>> usr/mgmt.c | 4 ++--
>> 2 files changed, 10 insertions(+), 6 deletions(-)
>>
>> diff --git a/usr/concat_buf.c b/usr/concat_buf.c
>> index 9395f4b..00661d4 100644
>> --- a/usr/concat_buf.c
>> +++ b/usr/concat_buf.c
>> @@ -74,13 +74,17 @@ int concat_write(struct concat_buf *b, int fd, int offset)
>> {
>> concat_buf_finish(b);
>>
>> - if (b->err)
>> - return b->err;
>> + if (b->err) {
>> + errno = b->err;
>> + return -1;
>> + }
>>
>> if (b->size - offset > 0)
>> return write(fd, b->buf + offset, b->size - offset);
>> - else
>> - return 0;
>> + else {
>> + errno = EINVAL;
>> + return -1;
>> + }
>> }
>>
>> void concat_buf_release(struct concat_buf *b)
>> diff --git a/usr/mgmt.c b/usr/mgmt.c
>> index 8b62d13..8915dea 100644
>> --- a/usr/mgmt.c
>> +++ b/usr/mgmt.c
>> @@ -590,9 +590,9 @@ static void mtask_recv_send_handler(int fd, int events, void *data)
>> break;
>> case MTASK_STATE_PDU_SEND:
>> err = concat_write(&mtask->rsp_concat, fd, mtask->done);
>> - if (err > 0) {
>> + if (err >= 0) {
>> mtask->done += err;
>> - if (mtask->done == rsp->len) {
>> + if (mtask->done == (rsp->len - sizeof(*rsp))) {
>> if (req->mode == MODE_SYSTEM &&
>> req->op == OP_DELETE &&
>> !rsp->err)
>> --
>> 1.7.9.6
>>
>> --
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