[PATCH v3 0/4] Add two new system call mq_recvmmsg() and mq_sendmmsg() to posix ipc mqueue

[mathura kumar]

Patch series overview:

  1. Add New system call mq_recvmmsg(), mq_sendmmsg() and handler implementation.
  2. Add system call number in all most common architectures.
  3. Add entries in performance tools.
  4. Prepared Documentation and test.

Hi Everyone,

It has been couple of month since last work but yeah I had quite hectic schedule
and has been recieved lot of feedback to improve many thing. I am also new in kernel
development so its hard in early month to digest lot of subtle things in code,
flow etc.
Therefore i have taken time to deep dive..

so now,I will be gratefull if you spend little bit of time in reviewing current work.

Thanks,

change since v2:

 -  my official mail changed to <mathura.kumar.tech@xxxxxxxxx> from <academic1mathura@xxxxxxxxx>

 -  iovec is introduced for arguments.

 - since v2 does not contain batch operation and I introduced batch support now
    in recv or peek, due to that I added one more system call to support 
    batch during send as well otherwise i don't see any benefites of having
    batching in consumer side only.

 -  tree is augmented with two new field for improving traversal complexity.

 - lot of edges cases got handled like compat layer, Flag check for unkown operation to
    make it robust and resilient.

 - self test is updated
 - documentation is updated appropriately.

 - v2 Link: https://lore.kernel.org/linux-arch/20260320052340.6696-1-academic1mathura@xxxxxxxxx/T/#t



mathura kumar (4):
  IPC: Added two new system call mq_recvmmsg() and  mq_sendmmsg()
  IPC: Added system call entry in all of most common  architectures
  IPC: Added system call entry in performance tool
  Test: Added self-testing and documentation

 Documentation/userspace-api/index.rst         |   2 +
 Documentation/userspace-api/mq_recvmmsg.rst   | 205 +++++++
 Documentation/userspace-api/mq_sendmmsg.rst   | 168 ++++++
 arch/alpha/kernel/syscalls/syscall.tbl        |   2 +
 arch/arm/tools/syscall.tbl                    |   2 +
 arch/arm64/tools/syscall_32.tbl               |   3 +
 arch/m68k/kernel/syscalls/syscall.tbl         |   2 +
 arch/microblaze/kernel/syscalls/syscall.tbl   |   2 +
 arch/mips/kernel/syscalls/syscall_n32.tbl     |   2 +
 arch/mips/kernel/syscalls/syscall_n64.tbl     |   3 +
 arch/mips/kernel/syscalls/syscall_o32.tbl     |   2 +
 arch/parisc/kernel/syscalls/syscall.tbl       |   2 +
 arch/powerpc/kernel/syscalls/syscall.tbl      |   2 +
 arch/s390/kernel/syscalls/syscall.tbl         |   3 +
 arch/sh/kernel/syscalls/syscall.tbl           |   2 +
 arch/sparc/kernel/syscalls/syscall.tbl        |   3 +
 arch/x86/entry/syscalls/syscall_32.tbl        |   2 +
 arch/x86/entry/syscalls/syscall_64.tbl        |   3 +-
 arch/xtensa/kernel/syscalls/syscall.tbl       |   2 +
 include/linux/compat.h                        |  12 +-
 include/linux/syscalls.h                      |   9 +
 include/uapi/asm-generic/unistd.h             |   9 +-
 include/uapi/linux/mqueue.h                   |  27 +-
 ipc/mqueue.c                                  | 568 +++++++++++++++++-
 ipc/msg.c                                     |   2 +-
 ipc/msgutil.c                                 |  45 +-
 ipc/util.h                                    |   3 +-
 kernel/sys_ni.c                               |   6 +
 scripts/syscall.tbl                           |   2 +
 tools/include/uapi/asm-generic/unistd.h       |   8 +-
 .../arch/alpha/entry/syscalls/syscall.tbl     |   4 +
 .../perf/arch/arm/entry/syscalls/syscall.tbl  |   3 +
 .../arch/arm64/entry/syscalls/syscall_32.tbl  |   3 +
 .../arch/mips/entry/syscalls/syscall_n64.tbl  |   2 +
 .../arch/parisc/entry/syscalls/syscall.tbl    |   3 +
 .../arch/powerpc/entry/syscalls/syscall.tbl   |   3 +
 .../perf/arch/s390/entry/syscalls/syscall.tbl |   2 +
 tools/perf/arch/sh/entry/syscalls/syscall.tbl |   2 +
 .../arch/sparc/entry/syscalls/syscall.tbl     |   2 +
 .../arch/x86/entry/syscalls/syscall_32.tbl    |   2 +
 .../arch/x86/entry/syscalls/syscall_64.tbl    |   2 +
 .../arch/xtensa/entry/syscalls/syscall.tbl    |   2 +
 tools/scripts/syscall.tbl                     |   2 +
 tools/testing/selftests/ipc/Makefile          |   2 +-
 tools/testing/selftests/ipc/mq_recvmmsg.c     | 392 ++++++++++++
 tools/testing/selftests/ipc/mq_sendmmsg.c     | 360 +++++++++++
 46 files changed, 1823 insertions(+), 66 deletions(-)
 create mode 100644 Documentation/userspace-api/mq_recvmmsg.rst
 create mode 100644 Documentation/userspace-api/mq_sendmmsg.rst
 create mode 100644 tools/testing/selftests/ipc/mq_recvmmsg.c
 create mode 100644 tools/testing/selftests/ipc/mq_sendmmsg.c

-- 
2.43.0