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h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mJoiJagPKO3t1jkKJrbz4/vjoeEXgERDW7YnvkLu2iI=; b=btmmURmEsKQ1qXpv/sGq7pgqjjyYP2Jemw1WRB9P5ID60kWlGxP9HG+BIJQJa5GTGx0mS4 U3kUr41m9NcclequkcpP49NquXjBNiD4otEur/WEvBqzv+Hbjv4mafouNBu4KVbX/mNo6t QRO81nk/lNJ+2KiamVMh1lK4zWTEGks= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1680199439; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mJoiJagPKO3t1jkKJrbz4/vjoeEXgERDW7YnvkLu2iI=; b=eMoloApYy1a7Z8XJwxMaIGRldLZfy/BGKw11gPG8OYaeg9QgTtIKdn+YmW0ZEjwtoUOkop T/hIBSwmHiS77qAQ== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Claudio Fontana , jfehlig@suse.com, dfaggioli@suse.com, dgilbert@redhat.com, =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Juan Quintela , Nikolay Borisov Subject: [RFC PATCH v1 06/26] io: add and implement QIO_CHANNEL_FEATURE_SEEKABLE for channel file Date: Thu, 30 Mar 2023 15:03:16 -0300 Message-Id: <20230330180336.2791-7-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230330180336.2791-1-farosas@suse.de> References: <20230330180336.2791-1-farosas@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2001:67c:2178:6::1d; envelope-from=farosas@suse.de; helo=smtp-out2.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @suse.de) X-ZM-MESSAGEID: 1680199576862100002 From: Nikolay Borisov Add a generic QIOChannel feature SEEKABLE which would be used by the qemu_file* apis. For the time being this will be only implemented for file channels. Signed-off-by: Nikolay Borisov Signed-off-by: Fabiano Rosas Reviewed-by: Daniel P. Berrang=C3=A9 --- include/io/channel.h | 1 + io/channel-file.c | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/include/io/channel.h b/include/io/channel.h index 153fbd2904..29461dda41 100644 --- a/include/io/channel.h +++ b/include/io/channel.h @@ -44,6 +44,7 @@ enum QIOChannelFeature { QIO_CHANNEL_FEATURE_LISTEN, QIO_CHANNEL_FEATURE_WRITE_ZERO_COPY, QIO_CHANNEL_FEATURE_READ_MSG_PEEK, + QIO_CHANNEL_FEATURE_SEEKABLE, }; =20 =20 diff --git a/io/channel-file.c b/io/channel-file.c index d76663e6ae..a0268232da 100644 --- a/io/channel-file.c +++ b/io/channel-file.c @@ -35,6 +35,10 @@ qio_channel_file_new_fd(int fd) =20 ioc->fd =3D fd; =20 + if (lseek(fd, 0, SEEK_CUR) !=3D (off_t)-1) { + qio_channel_set_feature(QIO_CHANNEL(ioc), QIO_CHANNEL_FEATURE_SEEK= ABLE); + } + trace_qio_channel_file_new_fd(ioc, fd); =20 return ioc; @@ -59,6 +63,10 @@ qio_channel_file_new_path(const char *path, return NULL; } =20 + if (lseek(ioc->fd, 0, SEEK_CUR) !=3D (off_t)-1) { + qio_channel_set_feature(QIO_CHANNEL(ioc), QIO_CHANNEL_FEATURE_SEEK= ABLE); + } + trace_qio_channel_file_new_path(ioc, path, flags, mode, ioc->fd); =20 return ioc; --=20 2.35.3