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From: Steven Sistare <steven.sistare@oracle.com>
To: "Marc-André Lureau" <marcandre.lureau@gmail.com>
Cc: "Jason Zeng" <jason.zeng@linux.intel.com>,
	"Juan Quintela" <quintela@redhat.com>,
	"Eric Blake" <eblake@redhat.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	QEMU <qemu-devel@nongnu.org>,
	"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
	"Alex Williamson" <alex.williamson@redhat.com>,
	"Stefan Hajnoczi" <stefanha@redhat.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Daniel P. Berrange" <berrange@redhat.com>,
	"Philippe Mathieu-Daudé" <philmd@redhat.com>,
	"Alex Bennée" <alex.bennee@linaro.org>,
	"Markus Armbruster" <armbru@redhat.com>
Subject: Re: [PATCH V5 06/25] oslib: qemu_clr_cloexec
Date: Mon, 12 Jul 2021 13:07:32 -0400	[thread overview]
Message-ID: <31b06477-5e60-48a8-b6ca-bbb06281249b@oracle.com> (raw)
In-Reply-To: <CAJ+F1C+ZOUi4+P32WorCJsusQxFUo-7T4=pbhmj0n2WzBHqnsQ@mail.gmail.com>

On 7/8/2021 9:58 AM, Marc-André Lureau wrote:
> Hi
> 
> On Wed, Jul 7, 2021 at 9:33 PM Steve Sistare <steven.sistare@oracle.com <mailto:steven.sistare@oracle.com>> wrote:
> 
>     Define qemu_clr_cloexec, analogous to qemu_set_cloexec.
> 
>     Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com <mailto:dgilbert@redhat.com>>
>     Signed-off-by: Steve Sistare <steven.sistare@oracle.com <mailto:steven.sistare@oracle.com>>
>     ---
>      include/qemu/osdep.h | 1 +
>      util/oslib-posix.c   | 9 +++++++++
>      util/oslib-win32.c   | 4 ++++
>      3 files changed, 14 insertions(+)
> 
>     diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
>     index c91a78b..3d6a6ca 100644
>     --- a/include/qemu/osdep.h
>     +++ b/include/qemu/osdep.h
>     @@ -637,6 +637,7 @@ static inline void qemu_timersub(const struct timeval *val1,
>      #endif
> 
>      void qemu_set_cloexec(int fd);
>     +void qemu_clr_cloexec(int fd);
> 
> 
> I wish we would have a single function to set or unset, tbh. (as _clr_ isn't as readable to me)

I would rather not replace the existing qemu_set_cloexec calls, but I will expand clr to clear.

>      /* Starting on QEMU 2.5, qemu_hw_version() returns "2.5+" by default
>       * instead of QEMU_VERSION, so setting hw_version on MachineClass
>     diff --git a/util/oslib-posix.c b/util/oslib-posix.c
>     index e8bdb02..97577f1 100644
>     --- a/util/oslib-posix.c
>     +++ b/util/oslib-posix.c
>     @@ -309,6 +309,15 @@ void qemu_set_cloexec(int fd)
>          assert(f != -1);
>      }
> 
>     +void qemu_clr_cloexec(int fd)
>     +{
>     +    int f;
>     +    f = fcntl(fd, F_GETFD);
>     +    assert(f != -1);
>     +    f = fcntl(fd, F_SETFD, f & ~FD_CLOEXEC);
>     +    assert(f != -1);
>     +}
> 
> 
> (asserting() may not be very judicious for calls that we intend to make during running time, but that's the way it is so far)

yep.

- Steve

>     +
>      /*
>       * Creates a pipe with FD_CLOEXEC set on both file descriptors
>       */
>     diff --git a/util/oslib-win32.c b/util/oslib-win32.c
>     index af559ef..46e94d9 100644
>     --- a/util/oslib-win32.c
>     +++ b/util/oslib-win32.c
>     @@ -265,6 +265,10 @@ void qemu_set_cloexec(int fd)
>      {
>      }
> 
>     +void qemu_clr_cloexec(int fd)
>     +{
>     +}
>     +
>      /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
>      #define _W32_FT_OFFSET (116444736000000000ULL)
> 
>     -- 
>     1.8.3.1
> 
> 
> 
> 
> -- 
> Marc-André Lureau


  reply	other threads:[~2021-07-12 17:09 UTC|newest]

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-07 17:20 [PATCH V5 00/25] Live Update Steve Sistare
2021-07-07 17:20 ` [PATCH V5 01/25] qemu_ram_volatile Steve Sistare
2021-07-08 12:01   ` Marc-André Lureau
2021-07-12 17:06     ` Steven Sistare
2021-07-07 17:20 ` [PATCH V5 02/25] cpr: reboot mode Steve Sistare
2021-07-08 12:25   ` Marc-André Lureau
2021-07-12 17:07     ` Steven Sistare
2021-08-04 15:48   ` Eric Blake
2021-07-07 17:20 ` [PATCH V5 03/25] cpr: QMP interfaces for reboot Steve Sistare
2021-07-08 13:27   ` Marc-André Lureau
2021-07-12 17:07     ` Steven Sistare
2021-08-04 15:48   ` Eric Blake
2021-08-04 20:27     ` Steven Sistare
2021-07-07 17:20 ` [PATCH V5 04/25] cpr: HMP " Steve Sistare
2021-07-28  4:55   ` Zheng Chuan
2021-07-07 17:20 ` [PATCH V5 05/25] as_flat_walk Steve Sistare
2021-07-08 13:49   ` Marc-André Lureau
2021-07-12 17:07     ` Steven Sistare
2021-07-07 17:20 ` [PATCH V5 06/25] oslib: qemu_clr_cloexec Steve Sistare
2021-07-08 13:58   ` Marc-André Lureau
2021-07-12 17:07     ` Steven Sistare [this message]
2021-07-07 17:20 ` [PATCH V5 07/25] machine: memfd-alloc option Steve Sistare
2021-07-08 14:20   ` Marc-André Lureau
2021-07-12 17:07     ` Steven Sistare
2021-07-12 17:45       ` Marc-André Lureau
2021-07-07 17:20 ` [PATCH V5 08/25] vl: add helper to request re-exec Steve Sistare
2021-07-08 14:31   ` Marc-André Lureau
2021-07-12 17:07     ` Steven Sistare
2021-07-07 17:20 ` [PATCH V5 09/25] string to strList Steve Sistare
2021-07-08 14:37   ` Marc-André Lureau
2021-07-07 17:20 ` [PATCH V5 10/25] util: env var helpers Steve Sistare
2021-07-08 15:10   ` Marc-André Lureau
2021-07-12 19:19     ` Steven Sistare
2021-07-12 19:36       ` Marc-André Lureau
2021-07-13 16:15         ` Steven Sistare
2021-07-07 17:20 ` [PATCH V5 11/25] cpr: restart mode Steve Sistare
2021-07-08 15:43   ` Marc-André Lureau
2021-07-08 15:54     ` Marc-André Lureau
2021-07-12 19:19       ` Steven Sistare
2021-07-07 17:20 ` [PATCH V5 12/25] cpr: QMP interfaces for restart Steve Sistare
2021-07-08 15:49   ` Marc-André Lureau
2021-07-12 19:19     ` Steven Sistare
2021-08-04 16:00   ` Eric Blake
2021-08-04 20:22     ` Steven Sistare
2021-07-07 17:20 ` [PATCH V5 13/25] cpr: HMP " Steve Sistare
2021-07-28  4:56   ` Zheng Chuan
2021-07-07 17:20 ` [PATCH V5 14/25] pci: export functions for cpr Steve Sistare
2021-07-07 17:20 ` [PATCH V5 15/25] vfio-pci: refactor " Steve Sistare
2021-07-07 17:20 ` [PATCH V5 16/25] vfio-pci: cpr part 1 Steve Sistare
2021-07-16 17:45   ` Alex Williamson
2021-07-19 17:43     ` Steven Sistare
2021-07-28  4:56   ` Zheng Chuan
2021-07-30 12:50     ` Steven Sistare
2021-07-07 17:20 ` [PATCH V5 17/25] vfio-pci: cpr part 2 Steve Sistare
2021-07-16 20:51   ` Alex Williamson
2021-07-19 17:44     ` Steven Sistare
2021-07-19 18:10       ` Alex Williamson
2021-07-19 18:38         ` Steven Sistare
2021-07-28  4:56           ` Zheng Chuan
2021-07-30 12:52             ` Steven Sistare
2021-07-31  6:07               ` Zheng Chuan
2021-07-07 17:20 ` [PATCH V5 18/25] vhost: reset vhost devices upon cprsave Steve Sistare
2021-07-07 17:20 ` [PATCH V5 19/25] hostmem-memfd: cpr support Steve Sistare
2021-07-07 17:20 ` [PATCH V5 20/25] chardev: cpr framework Steve Sistare
2021-07-08 16:03   ` Marc-André Lureau
2021-07-12 19:20     ` Steven Sistare
2021-07-12 19:49       ` Marc-André Lureau
2021-07-13 14:34         ` Steven Sistare
2021-07-07 17:20 ` [PATCH V5 21/25] chardev: cpr for simple devices Steve Sistare
2021-07-07 17:20 ` [PATCH V5 22/25] chardev: cpr for pty Steve Sistare
2021-07-07 17:20 ` [PATCH V5 23/25] chardev: cpr for sockets Steve Sistare
2021-07-29  4:04   ` Zheng Chuan
2021-07-07 17:20 ` [PATCH V5 24/25] cpr: only-cpr-capable option Steve Sistare
2021-07-07 17:20 ` [PATCH V5 25/25] simplify savevm Steve Sistare

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