[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-block] [PATCH v6 06/22] osdep: Introduce qemu_dup
From: |
Fam Zheng |
Subject: |
Re: [Qemu-block] [PATCH v6 06/22] osdep: Introduce qemu_dup |
Date: |
Wed, 22 Jun 2016 15:37:27 +0800 |
User-agent: |
Mutt/1.6.1 (2016-04-27) |
On Fri, 06/17 15:08, Kevin Wolf wrote:
> Am 17.06.2016 um 14:32 hat Kevin Wolf geschrieben:
> > Am 03.06.2016 um 10:49 hat Fam Zheng geschrieben:
> > > This takes care of both the CLOEXEC flag and fd-path mapping for image
> > > locking.
> > >
> > > Signed-off-by: Fam Zheng <address@hidden>
> > > ---
> > > include/qemu/osdep.h | 3 +++
> > > util/osdep.c | 9 +++++++++
> > > 2 files changed, 12 insertions(+)
> > >
> > > diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
> > > index 749214a..89c63c7 100644
> > > --- a/include/qemu/osdep.h
> > > +++ b/include/qemu/osdep.h
> > > @@ -281,6 +281,9 @@ int qemu_madvise(void *addr, size_t len, int advice);
> > > int qemu_open(const char *name, int flags, ...);
> > > int qemu_close(int fd);
> > > int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive);
> > > +#ifndef _WIN32
> > > +int qemu_dup(int fd);
> > > +#endif
> > > int qemu_unlock_fd(int fd, int64_t start, int64_t len);
> > >
> > > #if defined(__HAIKU__) && defined(__i386__)
> > > diff --git a/util/osdep.c b/util/osdep.c
> > > index 085ed52..1c87c1e 100644
> > > --- a/util/osdep.c
> > > +++ b/util/osdep.c
> > > @@ -133,6 +133,15 @@ fail:
> > > return -1;
> > > }
> > >
> > > +int qemu_dup(int fd)
> > > +{
> > > + int r = qemu_dup_flags(fd, 0);
> >
> > This clears all file status flags that might be set. I don't think we
> > use any of them (on Linux at least, raw-posix still seems to use it for
> > platform without O_DIRECT), but isn't this still surprising?
>
> Maybe this means that qemu_dup_flags() should call qemu_dup() instead of
> the other way round.
>
Yes, I think you are right.
Fam
- Re: [Qemu-block] [PATCH v6 03/22] blockdev: Add and parse "lock-mode" option for image locking, (continued)
[Qemu-block] [PATCH v6 07/22] raw-posix: Use qemu_dup, Fam Zheng, 2016/06/03
[Qemu-block] [PATCH v6 06/22] osdep: Introduce qemu_dup, Fam Zheng, 2016/06/03
[Qemu-block] [PATCH v6 09/22] qemu-io: Add "-L" option for BDRV_O_NO_LOCK, Fam Zheng, 2016/06/03
[Qemu-block] [PATCH v6 08/22] raw-posix: Add image locking support, Fam Zheng, 2016/06/03
[Qemu-block] [PATCH v6 10/22] qemu-img: Add "-L" option to sub commands, Fam Zheng, 2016/06/03
[Qemu-block] [PATCH v6 12/22] qemu-nbd: Add "--no-lock/-L" option, Fam Zheng, 2016/06/03
[Qemu-block] [PATCH v6 11/22] qemu-img: Update documentation of "-L" option, Fam Zheng, 2016/06/03
[Qemu-block] [PATCH v6 13/22] block: Don't lock drive-backup target image in none mode, Fam Zheng, 2016/06/03
[Qemu-block] [PATCH v6 14/22] mirror: Disable image locking on target backing chain, Fam Zheng, 2016/06/03