[libvirt] [PATCH 0/6] Don't run whole sec driver in namespace

In eadaa97548 I've tried to solve the issue of setting seclabels on private /dev/* entries. While my approach works, it has tiny flaw - anything that happens in the namespace stays in the namespace. I mean, if there's a internal state change occurring on relabel operation (it should not, and it doesn't nowadays, but it's no guarantee), this change is not reflected in the daemon. This is because when entering the namespace, the daemon forks, enters the namespace and then executes the RelabelAll() function. This imperfection is: a) very easy to forget b) very hard to debug Therefore, we may have transaction APIs as suggested here [1]. On transactionBegin() the sec driver will record [path. seclabel] somewhere instead of applying the label. Then on transactionCommit() new process is forked, enters the namespace and perform previously recorded changes. This way it is only the minimal code that runs in the namespace. Moreover, it runs over constant data thus there can be no internal state transition. 1: https://www.redhat.com/archives/libvir-list/2016-December/msg00254.html Michal Privoznik (6): security_selinux: s/virSecuritySELinuxSecurity/virSecuritySELinux/ security_dac: Resolve virSecurityDACSetOwnershipInternal const correctness security driver: Introduce transaction APIs security_dac: Implement transaction APIs security_selinux: Implement transaction APIs qemu: Use transactions from security driver src/libvirt_private.syms | 3 + src/qemu/qemu_driver.c | 28 +++-- src/qemu/qemu_security.c | 98 +++++---------- src/security/security_dac.c | 197 +++++++++++++++++++++++++++++- src/security/security_driver.h | 9 ++ src/security/security_manager.c | 38 ++++++ src/security/security_manager.h | 7 +- src/security/security_selinux.c | 219 +++++++++++++++++++++++++++++++--- src/security/security_stack.c | 49 ++++++++ src/storage/storage_backend.h | 2 +- src/storage/storage_backend_fs.c | 2 +- src/storage/storage_backend_gluster.c | 2 +- src/storage/storage_driver.c | 6 +- src/storage/storage_driver.h | 4 +- src/util/virstoragefile.c | 2 +- src/util/virstoragefile.h | 2 +- 16 files changed, 561 insertions(+), 107 deletions(-) -- 2.11.0