[00/15] linux: Add new syscalls

  This patchset adds two sets of new Linux syscalls: the pidfd extra
syscalls and the new mount API.

The pifd was initially added clone3 when issue CLONE_PIDFD to return
a file file descriptor referring to the child process.  This set adds
the missing pidfd_open (added on Linux 5.3), pidfd_getfd (Linux 5.6),
and pidfd_send_signal (Linux 5.1), along with P_PIDFD definition to
be used along waitid.  These newer syscalls now allows a race free
process signaling by avoiding the PID reuse.

Along with pidfd, two new syscalls are also added: process_madvise
and process_mrelease.  Both uses the pifd to add a way to interact
with target memory, former being a remove posix_madvise call and later
allowing the caller to handle target the memory cleanup.

The second set is the new mount API added Linux 5.2, which adds new
six syscalls: fsopen, fsmount, move_mount, fsconfig, fspick, and
open_tree.  It also adds mount_setattr which was added on Linux 5.12.
This is complete redesign of the mount API to allow more flexibility
with mount points, specially when used along namespaces.

Adhemerval Zanella (15):
  linux: Add pidfd_open
  linux: Add pidfd_getfd
  linux: Add pidfd_send_signal
  linux: Add P_PIDFD
  linux: Add tst-pidfd.c
  linux: Add process_madvise
  linux: Add process_mrelease
  linux: Add fsopen
  linux: Add fsmount
  linux: Add move_mount
  linux: Add fsconfig
  linux: Add fspick
  linux: Add open_tree
  linux: Add tst-mount to check for Linux new mount API
  linux: Add mount_setattr

 NEWS                                          |  14 +-
 bits/mman_ext.h                               |  21 +++
 misc/sys/mman.h                               |   3 +
 posix/Makefile                                |   2 +-
 posix/sys/wait.h                              |   7 +-
 sysdeps/generic/libc.abilist                  |   1 +
 sysdeps/mach/hurd/bits/types/idtype_t.h       |  12 ++
 sysdeps/unix/sysv/linux/Makefile              |  27 ++-
 sysdeps/unix/sysv/linux/Versions              |  14 ++
 sysdeps/unix/sysv/linux/aarch64/libc.abilist  |  12 ++
 sysdeps/unix/sysv/linux/alpha/libc.abilist    |  12 ++
 sysdeps/unix/sysv/linux/arc/libc.abilist      |  12 ++
 sysdeps/unix/sysv/linux/arm/be/libc.abilist   |  12 ++
 sysdeps/unix/sysv/linux/arm/le/libc.abilist   |  12 ++
 sysdeps/unix/sysv/linux/bits/mman_ext.h       |  35 ++++
 sysdeps/unix/sysv/linux/bits/types/idtype_t.h |  14 ++
 sysdeps/unix/sysv/linux/csky/libc.abilist     |  12 ++
 sysdeps/unix/sysv/linux/hppa/libc.abilist     |  12 ++
 sysdeps/unix/sysv/linux/i386/libc.abilist     |  12 ++
 sysdeps/unix/sysv/linux/ia64/libc.abilist     |  12 ++
 .../sysv/linux/m68k/coldfire/libc.abilist     |  12 ++
 .../unix/sysv/linux/m68k/m680x0/libc.abilist  |  12 ++
 .../sysv/linux/microblaze/be/libc.abilist     |  12 ++
 .../sysv/linux/microblaze/le/libc.abilist     |  12 ++
 .../sysv/linux/mips/mips32/fpu/libc.abilist   |  12 ++
 .../sysv/linux/mips/mips32/nofpu/libc.abilist |  12 ++
 .../sysv/linux/mips/mips64/n32/libc.abilist   |  12 ++
 .../sysv/linux/mips/mips64/n64/libc.abilist   |  12 ++
 sysdeps/unix/sysv/linux/nios2/libc.abilist    |  12 ++
 sysdeps/unix/sysv/linux/or1k/libc.abilist     |  12 ++
 .../linux/powerpc/powerpc32/fpu/libc.abilist  |  12 ++
 .../powerpc/powerpc32/nofpu/libc.abilist      |  12 ++
 .../linux/powerpc/powerpc64/be/libc.abilist   |  12 ++
 .../linux/powerpc/powerpc64/le/libc.abilist   |  12 ++
 .../unix/sysv/linux/riscv/rv32/libc.abilist   |  12 ++
 .../unix/sysv/linux/riscv/rv64/libc.abilist   |  12 ++
 .../unix/sysv/linux/s390/s390-32/libc.abilist |  12 ++
 .../unix/sysv/linux/s390/s390-64/libc.abilist |  12 ++
 sysdeps/unix/sysv/linux/sh/be/libc.abilist    |  12 ++
 sysdeps/unix/sysv/linux/sh/le/libc.abilist    |  12 ++
 .../sysv/linux/sparc/sparc32/libc.abilist     |  12 ++
 .../sysv/linux/sparc/sparc64/libc.abilist     |  12 ++
 sysdeps/unix/sysv/linux/sys/mount.h           | 115 ++++++++++++
 sysdeps/unix/sysv/linux/sys/pidfd.h           |  49 +++++
 sysdeps/unix/sysv/linux/syscalls.list         |  12 ++
 sysdeps/unix/sysv/linux/tst-mount-consts.py   |  55 ++++++
 sysdeps/unix/sysv/linux/tst-mount.c           | 119 ++++++++++++
 sysdeps/unix/sysv/linux/tst-pidfd-consts.py   |  42 +++++
 sysdeps/unix/sysv/linux/tst-pidfd.c           | 170 ++++++++++++++++++
 sysdeps/unix/sysv/linux/tst-process_madvise.c | 107 +++++++++++
 .../unix/sysv/linux/tst-process_mrelease.c    |  72 ++++++++
 .../unix/sysv/linux/x86_64/64/libc.abilist    |  12 ++
 .../unix/sysv/linux/x86_64/x32/libc.abilist   |  12 ++
 53 files changed, 1278 insertions(+), 9 deletions(-)
 create mode 100644 bits/mman_ext.h
 create mode 100644 sysdeps/mach/hurd/bits/types/idtype_t.h
 create mode 100644 sysdeps/unix/sysv/linux/bits/mman_ext.h
 create mode 100644 sysdeps/unix/sysv/linux/bits/types/idtype_t.h
 create mode 100644 sysdeps/unix/sysv/linux/sys/pidfd.h
 create mode 100755 sysdeps/unix/sysv/linux/tst-mount-consts.py
 create mode 100644 sysdeps/unix/sysv/linux/tst-mount.c
 create mode 100644 sysdeps/unix/sysv/linux/tst-pidfd-consts.py
 create mode 100644 sysdeps/unix/sysv/linux/tst-pidfd.c
 create mode 100644 sysdeps/unix/sysv/linux/tst-process_madvise.c
 create mode 100644 sysdeps/unix/sysv/linux/tst-process_mrelease.c