[v5,0/3] Support y2038 semctl_syscall()

  This series does three things:
 1. Creates a bits/semid_ds_t.h file (in every arch) that specifies
    struct semid_ds so we no longer have to use macros defined in
    sem-pad.h.
 2. Removes the sem-pad.h file as it is no longer needed.
 3. Adds a new __semid_ds32 that is passed to the kernel (as part of
    a union) when running on 32-bit systems. If we are doing an
    IPC_STAT command then the 32-bit sem_{c,o}time{_high} values are
    combined to create a 64-bit value.

The semctl_syscall() function passes a union semun to the kernel. The
union includes struct semid_ds as a member. On 32-bit architectures the
Linux kernel provides a *_high version of the 32-bit sem_otime and
sem_ctime values. These can be combined to get a 64-bit version of the
time.

This patch adjusts the struct semid_ds to support the *_high versions
of sem_otime and sem_ctime. For 32-bit systems with a 64-bit time_t
this can be used to get a 64-bit time from the two 32-bit values.

This series was tested by running:
  ./scripts/build-many-glibcs.py ... compilers
  ./scripts/build-many-glibcs.py ... glibcs
on my x86_64 machine.

I also ran make check on RV32 and I only see a total of 9 test failures.

v5:
 - Address v4 review comments
 - Set the semid_ds struct from a temp struct
v4:
 - Remove the __IPC_TIME64 macro
    - It was only used once and doesn't work if __IPC_64 is 0 (which is
      usually is)
 - Address failures pointed out by Vineet Gupta

Alistair Francis (3):
  bits/sem.h: Split out struct semid_ds
  semctl: Remove the sem-pad.h file
  sysv: linux: Pass 64-bit version of semctl syscall

 sysdeps/unix/sysv/linux/Makefile              |  3 +-
 sysdeps/unix/sysv/linux/bits/sem-pad.h        | 33 -------------
 sysdeps/unix/sysv/linux/bits/sem.h            | 26 +----------
 .../sysv/linux/bits/types/struct_semid_ds.h   | 46 +++++++++++++++++++
 .../linux/hppa/bits/types/struct_semid_ds.h   | 46 +++++++++++++++++++
 .../unix/sysv/linux/hppa/struct__semid_ds32.h | 32 +++++++++++++
 .../bits/types/struct_semid_ds.h}             | 20 +++++---
 .../{bits/sem-pad.h => struct__semid_ds32.h}  | 20 +++++---
 .../unix/sysv/linux/powerpc/bits/sem-pad.h    | 26 -----------
 .../powerpc/bits/types/struct_semid_ds.h      | 46 +++++++++++++++++++
 .../sysv/linux/powerpc/struct__semid_ds32.h   | 32 +++++++++++++
 sysdeps/unix/sysv/linux/semctl.c              | 30 ++++++++++--
 .../linux/sparc/bits/types/struct_semid_ds.h  | 46 +++++++++++++++++++
 .../sysv/linux/sparc/struct__semid_ds32.h     | 32 +++++++++++++
 sysdeps/unix/sysv/linux/struct__semid_ds32.h  | 32 +++++++++++++
 sysdeps/unix/sysv/linux/x86/bits/sem-pad.h    | 24 ----------
 .../bits/types/struct_semid_ds.h}             | 22 ++++++---
 .../unix/sysv/linux/x86/struct__semid_ds32.h  | 32 +++++++++++++
 18 files changed, 415 insertions(+), 133 deletions(-)
 delete mode 100644 sysdeps/unix/sysv/linux/bits/sem-pad.h
 create mode 100644 sysdeps/unix/sysv/linux/bits/types/struct_semid_ds.h
 create mode 100644 sysdeps/unix/sysv/linux/hppa/bits/types/struct_semid_ds.h
 create mode 100644 sysdeps/unix/sysv/linux/hppa/struct__semid_ds32.h
 rename sysdeps/unix/sysv/linux/{sparc/bits/sem-pad.h => mips/bits/types/struct_semid_ds.h} (56%)
 rename sysdeps/unix/sysv/linux/mips/{bits/sem-pad.h => struct__semid_ds32.h} (52%)
 delete mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/sem-pad.h
 create mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/types/struct_semid_ds.h
 create mode 100644 sysdeps/unix/sysv/linux/powerpc/struct__semid_ds32.h
 create mode 100644 sysdeps/unix/sysv/linux/sparc/bits/types/struct_semid_ds.h
 create mode 100644 sysdeps/unix/sysv/linux/sparc/struct__semid_ds32.h
 create mode 100644 sysdeps/unix/sysv/linux/struct__semid_ds32.h
 delete mode 100644 sysdeps/unix/sysv/linux/x86/bits/sem-pad.h
 rename sysdeps/unix/sysv/linux/{hppa/bits/sem-pad.h => x86/bits/types/struct_semid_ds.h} (52%)
 create mode 100644 sysdeps/unix/sysv/linux/x86/struct__semid_ds32.h
  

On Wed, Apr 1, 2020 at 10:01 AM Alistair Francis
<alistair.francis@wdc.com> wrote:
>
> This series does three things:
>  1. Creates a bits/semid_ds_t.h file (in every arch) that specifies
>     struct semid_ds so we no longer have to use macros defined in
>     sem-pad.h.
>  2. Removes the sem-pad.h file as it is no longer needed.
>  3. Adds a new __semid_ds32 that is passed to the kernel (as part of
>     a union) when running on 32-bit systems. If we are doing an
>     IPC_STAT command then the 32-bit sem_{c,o}time{_high} values are
>     combined to create a 64-bit value.
>
> The semctl_syscall() function passes a union semun to the kernel. The
> union includes struct semid_ds as a member. On 32-bit architectures the
> Linux kernel provides a *_high version of the 32-bit sem_otime and
> sem_ctime values. These can be combined to get a 64-bit version of the
> time.
>
> This patch adjusts the struct semid_ds to support the *_high versions
> of sem_otime and sem_ctime. For 32-bit systems with a 64-bit time_t
> this can be used to get a 64-bit time from the two 32-bit values.
>
> This series was tested by running:
>   ./scripts/build-many-glibcs.py ... compilers
>   ./scripts/build-many-glibcs.py ... glibcs
> on my x86_64 machine.
>
> I also ran make check on RV32 and I only see a total of 9 test failures.

Ping!

>
> v5:
>  - Address v4 review comments
>  - Set the semid_ds struct from a temp struct
> v4:
>  - Remove the __IPC_TIME64 macro
>     - It was only used once and doesn't work if __IPC_64 is 0 (which is
>       usually is)
>  - Address failures pointed out by Vineet Gupta
>
> Alistair Francis (3):
>   bits/sem.h: Split out struct semid_ds
>   semctl: Remove the sem-pad.h file
>   sysv: linux: Pass 64-bit version of semctl syscall
>
>  sysdeps/unix/sysv/linux/Makefile              |  3 +-
>  sysdeps/unix/sysv/linux/bits/sem-pad.h        | 33 -------------
>  sysdeps/unix/sysv/linux/bits/sem.h            | 26 +----------
>  .../sysv/linux/bits/types/struct_semid_ds.h   | 46 +++++++++++++++++++
>  .../linux/hppa/bits/types/struct_semid_ds.h   | 46 +++++++++++++++++++
>  .../unix/sysv/linux/hppa/struct__semid_ds32.h | 32 +++++++++++++
>  .../bits/types/struct_semid_ds.h}             | 20 +++++---
>  .../{bits/sem-pad.h => struct__semid_ds32.h}  | 20 +++++---
>  .../unix/sysv/linux/powerpc/bits/sem-pad.h    | 26 -----------
>  .../powerpc/bits/types/struct_semid_ds.h      | 46 +++++++++++++++++++
>  .../sysv/linux/powerpc/struct__semid_ds32.h   | 32 +++++++++++++
>  sysdeps/unix/sysv/linux/semctl.c              | 30 ++++++++++--
>  .../linux/sparc/bits/types/struct_semid_ds.h  | 46 +++++++++++++++++++
>  .../sysv/linux/sparc/struct__semid_ds32.h     | 32 +++++++++++++
>  sysdeps/unix/sysv/linux/struct__semid_ds32.h  | 32 +++++++++++++
>  sysdeps/unix/sysv/linux/x86/bits/sem-pad.h    | 24 ----------
>  .../bits/types/struct_semid_ds.h}             | 22 ++++++---
>  .../unix/sysv/linux/x86/struct__semid_ds32.h  | 32 +++++++++++++
>  18 files changed, 415 insertions(+), 133 deletions(-)
>  delete mode 100644 sysdeps/unix/sysv/linux/bits/sem-pad.h
>  create mode 100644 sysdeps/unix/sysv/linux/bits/types/struct_semid_ds.h
>  create mode 100644 sysdeps/unix/sysv/linux/hppa/bits/types/struct_semid_ds.h
>  create mode 100644 sysdeps/unix/sysv/linux/hppa/struct__semid_ds32.h
>  rename sysdeps/unix/sysv/linux/{sparc/bits/sem-pad.h => mips/bits/types/struct_semid_ds.h} (56%)
>  rename sysdeps/unix/sysv/linux/mips/{bits/sem-pad.h => struct__semid_ds32.h} (52%)
>  delete mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/sem-pad.h
>  create mode 100644 sysdeps/unix/sysv/linux/powerpc/bits/types/struct_semid_ds.h
>  create mode 100644 sysdeps/unix/sysv/linux/powerpc/struct__semid_ds32.h
>  create mode 100644 sysdeps/unix/sysv/linux/sparc/bits/types/struct_semid_ds.h
>  create mode 100644 sysdeps/unix/sysv/linux/sparc/struct__semid_ds32.h
>  create mode 100644 sysdeps/unix/sysv/linux/struct__semid_ds32.h
>  delete mode 100644 sysdeps/unix/sysv/linux/x86/bits/sem-pad.h
>  rename sysdeps/unix/sysv/linux/{hppa/bits/sem-pad.h => x86/bits/types/struct_semid_ds.h} (52%)
>  create mode 100644 sysdeps/unix/sysv/linux/x86/struct__semid_ds32.h
>
> --
> 2.26.0
>