[MESOS-5121] pivot_root is not available on PowerPC

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Epic Link: PowerPC
• Sprint: Mesosphere Sprint 32
• Story Points: 1
• Assignee: Chen Zhiwei
• Reporter: Chen Zhiwei
• Shepherd: Vinod Kone
• Created: 05/Apr/16 07:00
• Updated: 31/May/16 02:12
• Resolved: 05/Apr/16 17:08

Description

When compile on ppc64le, it will through error message: src/linux/fs.cpp:443:2: error: #error "pivot_root is not available"

The current code logic in src/linux/fs.cpp is:

#ifdef __NR_pivot_root
  int ret = ::syscall(__NR_pivot_root, newRoot.c_str(), putOld.c_str());
#elif __x86_64__
  // A workaround for systems that have an old glib but have a new
  // kernel. The magic number '155' is the syscall number for
  // 'pivot_root' on the x86_64 architecture, see
  // arch/x86/syscalls/syscall_64.tbl
  int ret = ::syscall(155, newRoot.c_str(), putOld.c_str());
#else
#error "pivot_root is not available"
#endif

There is no old glib version and the new kernel version, it will never run code in #ifdef __NR_pivot_root condition, and when I build on Ubuntu 16.04(It has the latest linux kernel and glibc), it still can't step into the #ifdef __NR_pivot_root condition.

For powerpc case, I added another condition:

#elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
  // A workaround for powerpc. The magic number '203' is the syscall
  // number for 'pivot_root' on the powerpc architecture, see
  // https://w3challs.com/syscalls/?arch=powerpc_64
  int ret = ::syscall(203, newRoot.c_str(), putOld.c_str());

Issue Links

• is cloned by: MESOS-5263 pivot_root is not available on ARM
• is related to: MESOS-2022 Mesos does not compile on ARM architecture