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Re: [PATCH v5 4/8] util: refactor qemu_open_old to split off variadic ar
From: |
Markus Armbruster |
Subject: |
Re: [PATCH v5 4/8] util: refactor qemu_open_old to split off variadic args handling |
Date: |
Thu, 03 Sep 2020 11:00:33 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) |
Daniel P. Berrangé <berrange@redhat.com> writes:
> This simple refactoring prepares for future patches. The variadic args
> handling is split from the main bulk of the open logic. The duplicated
> calls to open() are removed in favour of updating the "flags" variable
> to have O_CLOEXEC.
Drop the second sentence, it is no longer true in this revision.
> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
> ---
> util/osdep.c | 25 ++++++++++++++++++-------
> 1 file changed, 18 insertions(+), 7 deletions(-)
>
> diff --git a/util/osdep.c b/util/osdep.c
> index 7504c156e8..dd34b58bb7 100644
> --- a/util/osdep.c
> +++ b/util/osdep.c
> @@ -22,6 +22,7 @@
> * THE SOFTWARE.
> */
> #include "qemu/osdep.h"
> +#include "qapi/error.h"
This patch doesn't use anything from qapi/error.h as far as I can tell.
Does the hunk belong to another patch?
>
> /* Needed early for CONFIG_BSD etc. */
>
> @@ -296,10 +297,10 @@ static int qemu_open_cloexec(const char *name, int
> flags, mode_t mode)
> /*
> * Opens a file with FD_CLOEXEC set
> */
> -int qemu_open_old(const char *name, int flags, ...)
> +static int
> +qemu_open_internal(const char *name, int flags, mode_t mode)
> {
> int ret;
> - int mode = 0;
>
> #ifndef _WIN32
> const char *fdset_id_str;
> @@ -324,15 +325,25 @@ int qemu_open_old(const char *name, int flags, ...)
> }
> #endif
>
> - if (flags & O_CREAT) {
> - va_list ap;
> + ret = qemu_open_cloexec(name, flags, mode);
> +
> + return ret;
> +}
> +
>
> - va_start(ap, flags);
> +int qemu_open_old(const char *name, int flags, ...)
> +{
> + va_list ap;
> + mode_t mode = 0;
> + int ret;
> +
> + va_start(ap, flags);
> + if (flags & O_CREAT) {
> mode = va_arg(ap, int);
> - va_end(ap);
> }
> + va_end(ap);
>
> - ret = qemu_open_cloexec(name, flags, mode);
> + ret = qemu_open_internal(name, flags, mode);
>
> #ifdef O_DIRECT
> if (ret == -1 && errno == EINVAL && (flags & O_DIRECT)) {
With the minor inaccuracies tidied up:
Reviewed-by: Markus Armbruster <armbru@redhat.com>
- [PATCH v5 0/8] block: improve error reporting for unsupported O_DIRECT, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 1/8] monitor: simplify functions for getting a dup'd fdset entry, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 2/8] util: split off a helper for dealing with O_CLOEXEC flag, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 3/8] util: rename qemu_open() to qemu_open_old(), Daniel P . Berrangé, 2020/09/02
- [PATCH v5 4/8] util: refactor qemu_open_old to split off variadic args handling, Daniel P . Berrangé, 2020/09/02
- Re: [PATCH v5 4/8] util: refactor qemu_open_old to split off variadic args handling,
Markus Armbruster <=
- [PATCH v5 5/8] util: add Error object for qemu_open_internal error reporting, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 6/8] util: introduce qemu_open and qemu_create with error reporting, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 7/8] util: give a specific error message when O_DIRECT doesn't work, Daniel P . Berrangé, 2020/09/02
- [PATCH v5 8/8] block/file: switch to use qemu_open/qemu_create for improved errors, Daniel P . Berrangé, 2020/09/02