Re: [libvirt RFCv6 03/27] iohelper: move runIO function to virfile.c
On 5/6/22 1:02 PM, Daniel P. Berrangé wrote:
On Thu, May 05, 2022 at 02:52:17PM +0200, Claudio Fontana wrote:
> where it can be reused by other helpers.
> No changes other than the move.
>
> Note that this makes iohelper now dependent on -lutil, because unused
> (for iohelper) parts of virfile.c contain calls to openpty(3).
Needs -lacl too on F35 at least.
> Signed-off-by: Claudio Fontana <cfontana(a)suse.de>
> ---
> src/util/iohelper.c | 175 -------------------------------------------
> src/util/meson.build | 4 +
> src/util/virfile.c | 172 ++++++++++++++++++++++++++++++++++++++++++
> src/util/virfile.h | 2 +
> 4 files changed, 178 insertions(+), 175 deletions(-)
>
> diff --git a/src/util/meson.build b/src/util/meson.build
> index 24350a3e67..84ef13ba32 100644
> --- a/src/util/meson.build
> +++ b/src/util/meson.build
> @@ -175,6 +175,7 @@ keycode_dep = declare_dependency(
>
> io_helper_sources = [
> 'iohelper.c',
> + 'virfile.c',
> ]
>
> virt_util_lib = static_library(
> @@ -213,6 +214,9 @@ if conf.has('WITH_LIBVIRTD')
> files(io_helper_sources),
> dtrace_gen_headers,
> ],
> + 'deps': [
Adding 'acl_dep' here is needed
> + libutil_dep,
> + ],
> }
> endif
>
> diff --git a/src/util/virfile.c b/src/util/virfile.c
> index 130b0fbace..b033a27264 100644
> --- a/src/util/virfile.c
> +++ b/src/util/virfile.c
> @@ -4577,3 +4577,175 @@ virFileSetCOW(const char *path,
> return 0;
> #endif /* ! __linux__ */
> }
> +
> +struct runIOParams {
> + bool isBlockDev;
> + bool isDirect;
> + bool isWrite;
> + int fdin;
> + const char *fdinname;
> + int fdout;
> + const char *fdoutname;
> +};
> +
> +/**
> + * runIOCopy: execute the IO copy based on the passed parameters
> + * @p: the IO parameters
> + *
> + * Execute the copy based on the passed parameters.
> + *
> + * Returns: size transfered, or < 0 on error.
> + */
> +
> +static off_t
> +runIOCopy(const struct runIOParams p)
> +{
> + g_autofree void *base = NULL; /* Location to be freed */
> + char *buf = NULL; /* Aligned location within base */
> + size_t buflen = 1024*1024;
> + intptr_t alignMask = 64*1024 - 1;
> + off_t total = 0;
> +
> +#if WITH_POSIX_MEMALIGN
> + if (posix_memalign(&base, alignMask + 1, buflen))
> + abort();
> + buf = base;
> +#else
> + buf = g_new0(char, buflen + alignMask);
> + base = buf;
> + buf = (char *) (((intptr_t) base + alignMask) & ~alignMask);
> +#endif
For reasons I don't understand 'WITH_POSIX_MEMALIGN' is defined
on mingw, but posix_memalign doesn't exist in header files and
thus we fail to compile.
THe original iohelper.c file is not compiled at all unless
WITH_LIBVIRTD is set, which is not on mingw, so we didn't
see this problem before WITH_POSIX_MEMALIGN.
With regards,
Daniel
Should I go back and put this stuff outside virFile.c then, would simplify things in my
view,
this is a very specialized use anyway no?
Thanks,
Claudio