Hi, This is v2 of patches. I posted v1 here.
https://lore.kernel.org/qemu-devel/20210924194854.919414-1-vgo...@redhat.com/ Posted corresponding kernel patches here. https://lore.kernel.org/linux-fsdevel/20211012180624.447474-1-vgo...@redhat.com/ changes since v1: - Modified patches to handle changes to fuse protocol which allowed protocol to send multiple security lables. As of now we can handle only one label and we expect it to be selinux label. - Added an option (-o security_label/no_security_label) to enable/disable security label. It is disabled by default. - Did a fix to not use fscreate if host does not have selinux enabled. Description ----------- These patches add support to receive and set file security context at the time of file creation. This is one of the components needed to support SELinux on virtiofs. These patches will allow users to configure virtiofsd in multiple modes to set security context. A. Guest and host selinux policies can work with each other. - virtiofsd will use /proc/thread-self/attr/fscreate knob to set security context before file creation. B. Remap guest selinux security xattr to something else say, trusted.virtiofs.security.selinux. - Give CAP_SYS_ADMIN to virtiofsd. - "-o -o xattrmap=:map:security.selinux:trusted.virtiofsd.:" C. If no SELinux on host. - Give CAP_SYS_ADMIN to virtiofsd and security xattr will be saved in security.selinux xattr on host. With these patches, I am able to boot a guest VM with rootfs on virtiofs and with SELinux enabled in guest. Vivek Goyal (6): fuse: Header file changes for FUSE_SECURITY_CTX virtiofsd, fuse_lowlevel.c: Add capability to parse security context virtiofsd: Move core file creation code in separate function virtiofsd: Create new file with fscreate set virtiofsd: Create new file using O_TMPFILE and set security context virtiofsd: Add an option to enable/disable security label docs/tools/virtiofsd.rst | 7 + include/standard-headers/linux/fuse.h | 19 +- tools/virtiofsd/fuse_common.h | 5 + tools/virtiofsd/fuse_i.h | 7 + tools/virtiofsd/fuse_lowlevel.c | 91 ++++++ tools/virtiofsd/helper.c | 1 + tools/virtiofsd/passthrough_ll.c | 414 ++++++++++++++++++++++++-- 7 files changed, 514 insertions(+), 30 deletions(-) -- 2.31.1
