From Arnd Bergmann <> Date Wed, 29 Jan 2020 14:55:53 +0100 Subject [GIT PULL] y2038: core, driver and file system changes The following changes since commit e42617b825f8073569da76dc4510bfa019b1c35a:



Linux 5.5-rc1 (2019-12-08 14:57:55 -0800)



are available in the Git repository at:



git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground.git

tags/y2038-drivers-for-v5.6-signed



for you to fetch changes up to c4e71212a245017d2ab05f322f7722f0b87a55da:



Revert "drm/etnaviv: reject timeouts with tv_nsec >= NSEC_PER_SEC"

(2020-01-28 23:24:23 +0100)



----------------------------------------------------------------

y2038: core, driver and file system changes



These are updates to device drivers and file systems that for some reason

or another were not included in the kernel in the previous y2038 series.



I've gone through all users of time_t again to make sure the kernel is

in a long-term maintainable state, replacing all remaining references

to time_t with safe alternatives.



Some related parts of the series were picked up into the nfsd, xfs,

alsa and v4l2 trees. A final set of patches in linux-mm removes the now

unused time_t/timeval/timespec types and helper functions after all five

branches are merged for linux-5.6, ensuring that no new users get merged.



As a result, linux-5.6, or my backport of the patches to 5.4 [1], should

be the first release that can serve as a base for a 32-bit system designed

to run beyond year 2038, with a few remaining caveats:



- All user space must be compiled with a 64-bit time_t, which will be

supported in the coming musl-1.2 and glibc-2.32 releases, along with

installed kernel headers from linux-5.6 or higher.



- Applications that use the system call interfaces directly need to be

ported to use the time64 syscalls added in linux-5.1 in place of the

existing system calls. This impacts most users of futex() and seccomp()

as well as programming languages that have their own runtime environment

not based on libc.



- Applications that use a private copy of kernel uapi header files or

their contents may need to update to the linux-5.6 version, in

particular for sound/asound.h, xfs/xfs_fs.h, linux/input.h,

linux/elfcore.h, linux/sockios.h, linux/timex.h and linux/can/bcm.h.



- A few remaining interfaces cannot be changed to pass a 64-bit time_t

in a compatible way, so they must be configured to use CLOCK_MONOTONIC

times or (with a y2106 problem) unsigned 32-bit timestamps. Most

importantly this impacts all users of 'struct input_event'.



- All y2038 problems that are present on 64-bit machines also apply to

32-bit machines. In particular this affects file systems with on-disk

timestamps using signed 32-bit seconds: ext4 with ext3-style small

inodes, ext2, xfs (to be fixed soon) and ufs.



Changes since v1 [2]:



- Add Acks I received

- Rebase to v5.5-rc1, dropping patches that got merged already

- Add NFS, XFS and the final three patches from another series

- Rewrite etnaviv patches

- Add one late revert to avoid an etnaviv regression



[1] https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=y2038-endgame

[2] https://lore.kernel.org/lkml/20191108213257.3097633-1-arnd@arndb.de/



----------------------------------------------------------------

Arnd Bergmann (21):

fat: use prandom_u32() for i_generation

dlm: use SO_SNDTIMEO_NEW instead of SO_SNDTIMEO_OLD

xtensa: ISS: avoid struct timeval

um: ubd: use 64-bit time_t where possible

acct: stop using get_seconds()

tsacct: add 64-bit btime field

packet: clarify timestamp overflow

hostfs: pass 64-bit timestamps to/from user space

hfs/hfsplus: use 64-bit inode timestamps

drm/msm: avoid using 'timespec'

drm/etnaviv: reject timeouts with tv_nsec >= NSEC_PER_SEC

drm/etnaviv: avoid deprecated timespec

sunrpc: convert to time64_t for expiry

nfs: use time64_t internally

nfs: fix timstamp debug prints

nfs: fscache: use timespec64 in inode auxdata

y2038: remove obsolete jiffies conversion functions

y2038: rename itimerval to __kernel_old_itimerval

y2038: sparc: remove use of struct timex

y2038: sh: remove timeval/timespec usage from headers

Revert "drm/etnaviv: reject timeouts with tv_nsec >= NSEC_PER_SEC"



arch/sh/include/uapi/asm/sockios.h | 4 +-

arch/sparc/kernel/sys_sparc_64.c | 33 ++++++------

arch/um/drivers/cow.h | 2 +-

arch/um/drivers/cow_user.c | 7 +--

arch/um/drivers/ubd_kern.c | 10 ++--

arch/um/include/shared/os.h | 2 +-

arch/um/os-Linux/file.c | 2 +-

.../platforms/iss/include/platform/simcall.h | 4 +-

drivers/gpu/drm/etnaviv/etnaviv_drv.c | 11 ++--

drivers/gpu/drm/etnaviv/etnaviv_drv.h | 11 ++--

drivers/gpu/drm/etnaviv/etnaviv_gem.c | 4 +-

drivers/gpu/drm/etnaviv/etnaviv_gem.h | 2 +-

drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 5 +-

drivers/gpu/drm/etnaviv/etnaviv_gpu.h | 5 +-

drivers/gpu/drm/msm/msm_drv.h | 3 +-

fs/dlm/lowcomms.c | 6 +--

fs/fat/inode.c | 3 +-

fs/hfs/hfs_fs.h | 28 ++++++++---

fs/hfs/inode.c | 4 +-

fs/hfsplus/hfsplus_fs.h | 28 +++++++++--

fs/hfsplus/inode.c | 12 ++---

fs/hostfs/hostfs.h | 22 ++++----

fs/hostfs/hostfs_kern.c | 15 +++---

fs/nfs/fscache-index.c | 6 ++-

fs/nfs/fscache.c | 18 ++++---

fs/nfs/fscache.h | 8 +--

fs/nfs/nfs4xdr.c | 10 ++--

include/linux/jiffies.h | 20 --------

include/linux/sunrpc/cache.h | 42 +++++++++-------

include/linux/sunrpc/gss_api.h | 4 +-

include/linux/sunrpc/gss_krb5.h | 2 +-

include/linux/syscalls.h | 9 ++--

include/uapi/linux/acct.h | 2 +

include/uapi/linux/taskstats.h | 6 ++-

include/uapi/linux/time_types.h | 5 ++

include/uapi/linux/timex.h | 2 +

kernel/acct.c | 4 +-

kernel/time/itimer.c | 18 +++----

kernel/time/time.c | 58 ++--------------------

kernel/tsacct.c | 9 ++--

net/packet/af_packet.c | 27 ++++++----

net/sunrpc/auth_gss/gss_krb5_mech.c | 12 +++--

net/sunrpc/auth_gss/gss_krb5_seal.c | 8 +--

net/sunrpc/auth_gss/gss_krb5_unseal.c | 6 +--

net/sunrpc/auth_gss/gss_krb5_wrap.c | 16 +++---

net/sunrpc/auth_gss/gss_mech_switch.c | 2 +-

net/sunrpc/auth_gss/svcauth_gss.c | 6 +--

net/sunrpc/cache.c | 16 +++---

net/sunrpc/svcauth_unix.c | 10 ++--

49 files changed, 283 insertions(+), 266 deletions(-)



