From edb4977837cbf82b0edc29cf8cbefa00c380fa16 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 30 Aug 2011 00:16:00 +0200 Subject: [PATCH] selinux: don't relabel /run/initramfs /run/initramfs usually contains the initrd so that we can jump back into it on shutdown. It's usually relatively large and static data, hence we should avoid relabelling of it. On my netbook this saves 6s. (6.6s needed for relabelling /dev and /run goes down to 600ms -- still way too much, but much better). --- src/mount-setup.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/src/mount-setup.c b/src/mount-setup.c index abb0c19d..f70c4d46 100644 --- a/src/mount-setup.c +++ b/src/mount-setup.c @@ -344,11 +344,18 @@ static int nftw_cb( struct FTW *ftwbuf) { /* No need to label /dev twice in a row... */ - if (ftwbuf->level == 0) - return 0; + if (_unlikely_(ftwbuf->level == 0)) + return FTW_CONTINUE; + + /* /run/initramfs is static data and big, no need to + * dynamically relabel it at boot... */ + if (_unlikely_(ftwbuf->level == 1 && + tflag == FTW_D && + streq(fpath, "/run/initramfs"))) + return FTW_SKIP_SUBTREE; label_fix(fpath, true); - return 0; + return FTW_CONTINUE; }; int mount_setup(bool loaded_policy) { @@ -381,8 +388,8 @@ int mount_setup(bool loaded_policy) { before_relabel = now(CLOCK_MONOTONIC); - nftw("/dev", nftw_cb, 64, FTW_MOUNT|FTW_PHYS); - nftw("/run", nftw_cb, 64, FTW_MOUNT|FTW_PHYS); + nftw("/dev", nftw_cb, 64, FTW_MOUNT|FTW_PHYS|FTW_ACTIONRETVAL); + nftw("/run", nftw_cb, 64, FTW_MOUNT|FTW_PHYS|FTW_ACTIONRETVAL); after_relabel = now(CLOCK_MONOTONIC); -- 2.39.5