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([141.164.41.4]) by smtp.gmail.com with ESMTPSA id g18sm5700449pfb.178.2021.05.07.16.58.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 May 2021 16:59:06 -0700 (PDT) From: Changbin Du To: Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet Cc: Jonathan Corbet , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, v9fs-developer@lists.sourceforge.net, "Enrico Weigelt, metux IT consult" , Changbin Du Subject: [PATCH v2 0/3] 9p: add support for root file systems Date: Sat, 8 May 2021 07:58:39 +0800 Message-Id: <20210507235842.16796-1-changbin.du@gmail.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Just like cifs and nfs, this short series enables rootfs support for 9p. Bellow is an example which mounts v9fs with tag 'r' as rootfs in qemu guest via virtio transport. $ qemu-system-x86_64 -enable-kvm -cpu host -m 1024 \ -virtfs local,path=$rootfs_dir,mount_tag=r,security_model=passthrough,id=r \ -kernel /path/to/linux/arch/x86/boot/bzImage -nographic \ -append "root=/dev/v9fs v9fsroot=r,trans=virtio rw console=ttyS0 3" v2: o use pr_err instead of printk. o ROOT_DEV is only set after checking. o cleanup DEFAULT_MNT_OPTS. o do not retry mount for fd and virtio transport. Changbin Du (3): 9p: add support for root file systems 9p: doc: move to a new dedicated folder 9p: doc: add v9fsroot description Documentation/filesystems/index.rst | 2 +- Documentation/filesystems/{ => v9fs}/9p.rst | 0 Documentation/filesystems/v9fs/index.rst | 12 ++++ Documentation/filesystems/v9fs/v9fsroot.rst | 52 +++++++++++++++++ MAINTAINERS | 8 ++- fs/9p/Kconfig | 6 ++ fs/9p/Makefile | 1 + fs/9p/v9fsroot.c | 64 +++++++++++++++++++++ include/linux/root_dev.h | 1 + init/do_mounts.c | 54 +++++++++++++++++ 10 files changed, 198 insertions(+), 2 deletions(-) rename Documentation/filesystems/{ => v9fs}/9p.rst (100%) create mode 100644 Documentation/filesystems/v9fs/index.rst create mode 100644 Documentation/filesystems/v9fs/v9fsroot.rst create mode 100644 fs/9p/v9fsroot.c -- 2.30.2