diff options
| author | Andreas Gruenbacher <agruenba@redhat.com> | 2016-01-05 23:12:33 +0100 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2022-04-19 00:52:00 +0300 |
| commit | cf0d42043fc66dd5f3e8b9556a692c70455f91ac (patch) | |
| tree | 225e86653b6dd996f8ca792359c0741757006459 /security/selinux/hooks.c | |
| parent | 99496f4811f5f2bb574dd078cd02ec025bd1ddba (diff) | |
selinux: Inode label revalidation performance fix
Commit 5d226df4 has introduced a performance regression of about
10% in the UnixBench pipe benchmark. It turns out that the call
to inode_security in selinux_file_permission can be moved below
the zero-mask test and that inode_security_revalidate can be
removed entirely, which brings us back to roughly the original
performance.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security/selinux/hooks.c')
| -rw-r--r-- | security/selinux/hooks.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 8e6866bad0be..62322ebf1221 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -274,11 +274,6 @@ static int __inode_security_revalidate(struct inode *inode, return 0; } -static void inode_security_revalidate(struct inode *inode) -{ - __inode_security_revalidate(inode, NULL, true); -} - static struct inode_security_struct *inode_security_novalidate(struct inode *inode) { return inode->i_security; @@ -3302,19 +3297,19 @@ static int selinux_file_permission(struct file *file, int mask) { struct inode *inode = file_inode(file); struct file_security_struct *fsec = file->f_security; - struct inode_security_struct *isec = inode_security(inode); + struct inode_security_struct *isec; u32 sid = current_sid(); if (!mask) /* No permission to check. Existence test. */ return 0; + isec = inode_security(inode); if (sid == fsec->sid && fsec->isid == isec->sid && fsec->pseqno == avc_policy_seqno()) /* No change since file_open check. */ return 0; - inode_security_revalidate(inode); return selinux_revalidate_file_permission(file, mask); } @@ -3620,7 +3615,6 @@ static int selinux_file_open(struct file *file, const struct cred *cred) * new inode label or new policy. * This check is not redundant - do not remove. */ - inode_security_revalidate(file_inode(file)); return file_path_has_perm(cred, file, open_file_to_av(file)); } |