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From: "Valdis Klētnieks" <valdis.kletnieks@vt.edu>
To: "Bj�rn Mork" <bjorn@mork.no>
Cc: noloader@gmail.com, kernelnewbies <kernelnewbies@kernelnewbies.org>
Subject: Re: Kernel TLS
Date: Sat, 30 Nov 2019 05:34:54 -0500
Message-ID: <59577.1575110094@turing-police> (raw)
In-Reply-To: <87tv6loes5.fsf@miraculix.mork.no>

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On Sat, 30 Nov 2019 11:10:50 +0100, Bjørn Mork said:

> My version of setsockopt(2) says
(...)
> ERRORS
>        EBADF     The  argument sockfd is not a valid file descrip‐
>                  tor.
>

Note that there is no general *guarantee* that a syscall cannot
return any values other than the ones in the manpage.

> If you look at e.g. udp_lib_setsockopt() you'll see that it conforms
> strictly to this.  I don't know why do_tcp_setsockopt() doesn't.

Probably because those are the only errors that the UDP version
can hit, but the TCP case can hit cases like "socket must be in
a connected state" and possibly other error codes.  Now, I admit
wondering why it uses ENOTSUPP rather than ENOTCONN for this
particular case.

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Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-29 19:36 Jeffrey Walton
2019-11-29 19:46 ` Alexander Mihalicyn
2019-11-29 19:48 ` Valentin Vidić
2019-11-29 19:57   ` Jeffrey Walton
2019-11-29 20:04     ` Jeffrey Walton
2019-11-30  4:37       ` Jeffrey Walton
2019-11-30  6:16         ` Alexander Mihalicyn
2019-11-30  6:40         ` Valdis Klētnieks
2019-11-30  8:13           ` Bjørn Mork
2019-11-30  9:11             ` Valdis Klētnieks
2019-11-30 10:10               ` Bjørn Mork
2019-11-30 10:34                 ` Valdis Klētnieks [this message]
2019-11-30 12:54                   ` [PATCH] net/tls: Fix return values for setsockopt Valentin Vidic
2019-11-30 13:15                     ` Jeffrey Walton
2019-11-30 13:31                       ` Valentin Vidić

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