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Message-ID: <b25312890906302332t10bc4cd0kf465c9e9afa04590@mail.gmail.com> Date: Wed, 1 Jul 2009 09:32:40 +0300 From: Rami Rosen <roszenrami@...il.com> To: Rémi Denis-Courmont <remi.denis-courmont@...ia.com> Cc: Netdev <netdev@...r.kernel.org> Subject: Re: Unix socket sendpage Hello, This is just a wild guess: maybe it has to do with that sendfile() is for copying data between one file descriptor and another; sendfile() invokes sendpage() of the corresponding protocol. With AF_UNIX sockets, which are IPC mechanism, you can pass file descriptors from one process to another using control messages (ancillary data). You can do it with SCM_RIGHTS type control message. (the msg_control of msg should point to a cmsghdr with SCM_RIGHTS as its cmsg_type) Just want to reiterate that I am not sure about it. Regards, Rami Rosen 2009/6/29 Rémi Denis-Courmont <remi.denis-courmont@...ia.com>: > > Hello, > > Am I unaware of some fundamental reasons why AF_UNIX sockets do not support > sendpage(splice)? or is it just that nobody bothered to write the code? > > -- > Rémi Denis-Courmont > Nokia Devices R&D, Maemo Software, Helsinki > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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