Hi, Le jeudi 29 janvier 2015 à 11:38 -0700, Jason Gunthorpe a écrit : > On Thu, Jan 29, 2015 at 07:00:00PM +0100, Yann Droneaud wrote: > > As specified in "Extending Verbs API" presentation [1] by Tzahi Oved > > during OFA International Developer Workshop 2013, the request's > > comp_mask should describe the request data: it's describe the > > availability of extended fields in the request. > > Conversely, the response's comp_mask should describe the presence > > of extended fields in the response. > > This makes sense to me as well. > > > - err = ib_copy_to_udata(ucore, &resp, sizeof(resp)); > > +end: > > + err = ib_copy_to_udata(ucore, &resp, resp_len); > > if (err) > > return err; > > > > I think resp_len should be returned, not 0? >
As said previously it's not possible to use the effective size of the response as the return value of the write() syscall: the syscall must return the size of the input buffer, not the size of the output buffer, otherwise it would break the semantics of the write() syscall. Regards. -- Yann Droneaud OPTEYA -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
