[LU-8956] Improve create performance with SELinux enabled

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.10.0
• Affects Version/s: Lustre 2.9.0
• Labels: cea patch sec
• Assignee: Sebastien Buisson (Inactive)
• Reporter: Sebastien Buisson (Inactive)

Description

In order to save a getxattr request at create time, we put inside the inode the security context information we got from security_dentry_init_security().

Without this optimisation, the create performance drops by 35% when enabling SELinux. With the optimisation, the performance drops by only 5%.

Issue Links

• is related to: LU-10130 mkdir returns -95 EOPNOTSUPP with 2.10.1 on sles 12 sp3 with CONFIG_SECURITY disabled