In order to use the rtc_tm_to_time64() and rtc_time64_to_tm()
helper functions in later patches, we have to ensure that
CONFIG_RTC_LIB is always built-in.
Note that this symbol only controls a couple of helper functions,
not the actual RTC subsystem, which remains optional and is
enabled with CONFIG_RTC_CLASS.
Signed-off-by: Arnd Bergmann <arnd(a)arndb.de>
---
arch/powerpc/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c32a181a7cbb..de2cda320fdd 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -232,6 +232,7 @@ config PPC
select OF_RESERVED_MEM
select OLD_SIGACTION if PPC32
select OLD_SIGSUSPEND
+ select RTC_LIB
select SPARSE_IRQ
select SYSCTL_EXCEPTION_TRACE
select VIRT_TO_BUS if !PPC64
--
2.9.0
Hi Thomas,
This is a pull request for the series that I sent earlier.
The series aims to switch vfs timestamps to use
struct timespec64. Currently vfs uses struct timespec,
which is not y2038 safe.
The flag patch applies cleanly. I've not seen the timestamps
update logic change often. The series applies cleanly on 4.17-rc6
and linux-next tip (top commit: next-20180517).
I'm not sure how to merge this kind of a series with a flag patch.
We are targeting 4.18 for this.
Let me know if you have other suggestions.
The series involves the following:
1. Add vfs helper functions for supporting struct timepec64 timestamps.
2. Cast prints of vfs timestamps to avoid warnings after the switch.
3. Simplify code using vfs timestamps so that the actual
replacement becomes easy.
4. Convert vfs timestamps to use struct timespec64 using a script.
This is a flag day patch.
I've tried to keep the conversions with the script simple, to
aid in the reviews. I've kept all the internal filesystem data
structures and function signatures the same.
Next steps:
1. Convert APIs that can handle timespec64, instead of converting
timestamps at the boundaries.
2. Update internal data structures to avoid timestamp conversions.
--
Changes from v1:
* Fix the pointer bug in the udf patch.
* Include Kees's patch for pstore.
* Fix hostfs regression found by kbuild bot.
The following changes since commit 771c577c23bac90597c685971d7297ea00f99d11:
Linux 4.17-rc6 (2018-05-20 15:31:38 -0700)
are available in the Git repository at:
https://github.com/deepa-hub/vfs vfs_timespec64
for you to fetch changes up to 213ae530f442029284ab6041812df0571ebd9da7:
vfs: change inode times to use struct timespec64 (2018-05-25 15:31:14 -0700)
----------------------------------------------------------------
Deepa Dinamani (6):
fs: add timespec64_truncate()
lustre: Use long long type to print inode time
ceph: make inode time prints to be long long
fs: nfs: get rid of memcpys for inode times
udf: Simplify calls to udf_disk_stamp_to_time
vfs: change inode times to use struct timespec64
Kees Cook (1):
pstore: Convert internal records to timespec64
drivers/firmware/efi/efi-pstore.c | 27 ++++----
drivers/staging/lustre/lustre/llite/llite_lib.c | 12 ++--
drivers/staging/lustre/lustre/llite/namei.c | 5 +-
drivers/staging/lustre/lustre/lmv/lmv_obd.c | 7 +-
drivers/staging/lustre/lustre/mdc/mdc_reint.c | 6 +-
drivers/staging/lustre/lustre/obdclass/obdo.c | 6 +-
drivers/tty/tty_io.c | 15 ++++-
drivers/usb/gadget/function/f_fs.c | 2 +-
fs/adfs/inode.c | 7 +-
fs/afs/fsclient.c | 2 +-
fs/attr.c | 14 ++--
fs/bad_inode.c | 2 +-
fs/btrfs/file.c | 6 +-
fs/btrfs/inode.c | 8 +--
fs/btrfs/ioctl.c | 4 +-
fs/btrfs/root-tree.c | 4 +-
fs/btrfs/transaction.c | 2 +-
fs/ceph/addr.c | 12 ++--
fs/ceph/cache.c | 4 +-
fs/ceph/caps.c | 6 +-
fs/ceph/file.c | 6 +-
fs/ceph/inode.c | 86 +++++++++++++------------
fs/ceph/mds_client.c | 7 +-
fs/ceph/snap.c | 6 +-
fs/cifs/cache.c | 4 +-
fs/cifs/fscache.c | 8 +--
fs/cifs/inode.c | 26 ++++----
fs/coda/coda_linux.c | 12 ++--
fs/configfs/inode.c | 12 ++--
fs/cramfs/inode.c | 2 +-
fs/ext4/ext4.h | 34 ++++++----
fs/ext4/ialloc.c | 4 +-
fs/ext4/namei.c | 2 +-
fs/f2fs/f2fs.h | 10 ++-
fs/f2fs/file.c | 12 ++--
fs/f2fs/inode.c | 12 ++--
fs/f2fs/namei.c | 4 +-
fs/fat/inode.c | 20 ++++--
fs/fat/namei_msdos.c | 21 +++---
fs/fat/namei_vfat.c | 22 ++++---
fs/fuse/inode.c | 2 +-
fs/gfs2/dir.c | 6 +-
fs/gfs2/glops.c | 4 +-
fs/hfs/inode.c | 4 +-
fs/hfsplus/inode.c | 12 ++--
fs/hostfs/hostfs_kern.c | 12 ++--
fs/inode.c | 58 ++++++++++++-----
fs/jffs2/dir.c | 18 +++---
fs/jffs2/file.c | 2 +-
fs/jffs2/fs.c | 12 ++--
fs/kernfs/dir.c | 4 +-
fs/kernfs/inode.c | 8 +--
fs/locks.c | 2 +-
fs/nfs/callback_proc.c | 4 +-
fs/nfs/fscache-index.c | 4 +-
fs/nfs/fscache.c | 12 ++--
fs/nfs/inode.c | 39 ++++++-----
fs/nfs/nfs2xdr.c | 25 ++++---
fs/nfs/nfs3xdr.c | 8 ++-
fs/nfs/nfs4xdr.c | 7 +-
fs/nfsd/blocklayout.c | 8 ++-
fs/nfsd/nfs3xdr.c | 14 ++--
fs/nfsd/nfs4xdr.c | 7 +-
fs/nfsd/nfsxdr.c | 2 +-
fs/ntfs/inode.c | 30 ++++-----
fs/ocfs2/dlmglue.c | 20 ++++--
fs/ocfs2/file.c | 6 +-
fs/orangefs/inode.c | 2 +-
fs/orangefs/orangefs-kernel.h | 2 +-
fs/overlayfs/inode.c | 2 +-
fs/overlayfs/overlayfs.h | 2 +-
fs/proc/uptime.c | 2 +-
fs/pstore/platform.c | 2 +-
fs/pstore/ram.c | 21 ++++--
fs/reiserfs/namei.c | 2 +-
fs/reiserfs/xattr.c | 4 +-
fs/ubifs/dir.c | 4 +-
fs/ubifs/file.c | 23 +++----
fs/ubifs/ubifs.h | 2 +-
fs/udf/ialloc.c | 4 +-
fs/udf/inode.c | 59 +++++++++--------
fs/udf/super.c | 17 +++--
fs/udf/udfdecl.h | 4 +-
fs/udf/udftime.c | 9 +--
fs/xfs/xfs_inode.c | 2 +-
fs/xfs/xfs_iops.c | 2 +-
fs/xfs/xfs_trans_inode.c | 2 +-
include/linux/fs.h | 24 +++----
include/linux/pstore.h | 2 +-
include/linux/stat.h | 8 +--
90 files changed, 558 insertions(+), 434 deletions(-)
--
2.17.0
The pstore conversion to timespec64 introduces its own method of passing
seconds into sscanf() and sprintf() type functions to work around the
timespec64 definition on 64-bit systems that redefine it to 'timespec'.
That hack is now finally getting removed, but that means we get a (harmless)
warning once both patches are merged:
fs/pstore/ram.c: In function 'ramoops_read_kmsg_hdr':
fs/pstore/ram.c:39:29: error: format '%ld' expects argument of type 'long int *', but argument 3 has type 'time64_t *' {aka 'long long int *'} [-Werror=format=]
#define RAMOOPS_KERNMSG_HDR "===="
^~~~~~
fs/pstore/ram.c:167:21: note: in expansion of macro 'RAMOOPS_KERNMSG_HDR'
This removes the pstore specific workaround and uses the same method that
we have in place for all other functions that print a timespec64.
Related to this, I found that the kasprintf() output contains an incorrect
nanosecond values for any number starting with zeroes, and I adapt the
format string accordingly.
Link: https://lkml.org/lkml/2018/5/19/115
Link: https://lkml.org/lkml/2018/5/16/1080
Fixes: 0f0d83b99ef7 ("pstore: Convert internal records to timespec64")
Signed-off-by: Arnd Bergmann <arnd(a)arndb.de>
---
fs/pstore/ram.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 69e893076ab7..bbd1e357c23d 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -38,11 +38,6 @@
#define RAMOOPS_KERNMSG_HDR "===="
#define MIN_MEM_SIZE 4096UL
-#if __BITS_PER_LONG == 64
-# define TVSEC_FMT "%ld"
-#else
-# define TVSEC_FMT "%lld"
-#endif
static ulong record_size = MIN_MEM_SIZE;
module_param(record_size, ulong, 0400);
@@ -164,15 +159,15 @@ static int ramoops_read_kmsg_hdr(char *buffer, struct timespec64 *time,
char data_type;
int header_length = 0;
- if (sscanf(buffer, RAMOOPS_KERNMSG_HDR TVSEC_FMT ".%lu-%c\n%n",
- &time->tv_sec, &time->tv_nsec, &data_type,
+ if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%lld.%lu-%c\n%n",
+ (time64_t *)&time->tv_sec, &time->tv_nsec, &data_type,
&header_length) == 3) {
if (data_type == 'C')
*compressed = true;
else
*compressed = false;
- } else if (sscanf(buffer, RAMOOPS_KERNMSG_HDR TVSEC_FMT ".%lu\n%n",
- &time->tv_sec, &time->tv_nsec,
+ } else if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%lld.%lu\n%n",
+ (time64_t *)&time->tv_sec, &time->tv_nsec,
&header_length) == 2) {
*compressed = false;
} else {
@@ -367,8 +362,8 @@ static size_t ramoops_write_kmsg_hdr(struct persistent_ram_zone *prz,
char *hdr;
size_t len;
- hdr = kasprintf(GFP_ATOMIC, RAMOOPS_KERNMSG_HDR TVSEC_FMT ".%lu-%c\n",
- record->time.tv_sec,
+ hdr = kasprintf(GFP_ATOMIC, RAMOOPS_KERNMSG_HDR "%lld.%06lu-%c\n",
+ (time64_t)record->time.tv_sec,
record->time.tv_nsec / 1000,
record->compressed ? 'C' : 'D');
WARN_ON_ONCE(!hdr);
--
2.9.0
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Hi Thomas,
I've had these patches for a while but never got around to submitting
them. I recently rebased them after the boot time removal and now again
after the revert.
I'd like to see these go into v4.18 as a preparation for a last set of
driver conversions to y2038-safe interfaces that I've held off for now
since the interfaces were suboptimal.
The problems solved by this series are:
- aliasing timespec to timespec64 is a little erorr-prone,
and in particular requires ugly casts to print a tv_sec field
using the same format string across architectures
- naming is inconsistent, and while converting from the
deprecated time_t to something else, I'd like to also
convert to a ktime_get_*() API for consistency
- drivers that use current_kernel_time() today often care
about the call being fast but don't care about it being
CLOCK_REALTIME based, so they are better off being changed
to a CLOCK_MONOTONIC or CLOCK_BOOTTIME based accessor
to avoid issues with time going backwards.
Arnd
Arnd Bergmann (5):
timekeeping: Remove timespec64 hack
timekeeping: Clean up ktime_get_real_ts64
timekeeping: Standardize on ktime_get_*() naming
timekeeping: Add ktime_get_coarse_with_offset
timekeeping: Add more coarse clocktai/boottime interfaces
include/linux/time32.h | 18 ++-------
include/linux/time64.h | 7 ----
include/linux/timekeeping.h | 91 ++++++++++++++++++++++++++++++++++++-------
include/linux/timekeeping32.h | 70 ++++++---------------------------
kernel/time/time.c | 2 -
kernel/time/timekeeping.c | 73 ++++++++++++++++------------------
6 files changed, 124 insertions(+), 137 deletions(-)
--
2.9.0
I've tried the suggestion from Jaroslaw, doing a minimal change to the
UAPI headers to keep the existing binary interface. As he predicted,
this is a much simpler set of kernel changes, but we will pay for that
with added complexity in alsa-lib.
The first two patches in this series are taken from Baolin's patch
set, with a small bugfix folded in to avoid a compile-time regression.
The other two patches are to redefine the UAPI and to deprecate
the support for CLOCK_REALTIME time stamps, which we can no longer
allow with user space that we expect to survive beyond 2038.
Overall, I'd still be happier with Baolin's approach since it allows
us to keep compatiblity with CLOCK_REALTIME users and requires
fewer changes in user space, but this would work as well.
Arnd
Cc: Jaroslav Kysela <perex(a)perex.cz>
Cc: tiwai(a)suse.com
Cc: lgirdwood(a)gmail.com
Cc: broonie(a)kernel.org
Cc: o-takashi(a)sakamocchi.jp
Cc: y2038(a)lists.linaro.org
Cc: alsa-devel(a)alsa-project.org
Cc: linux-kernel(a)vger.kernel.org
Cc: Baolin Wang <baolin.wang(a)linaro.org>
Arnd Bergmann (2):
ALSA: replace timespec types in uapi headers
ALSA: Deprecate CLOCK_REALTIME timestamps
Baolin Wang (2):
ALSA: Replace timespec with timespec64
ALSA: Avoid using timespec for struct snd_ctl_elem_value
include/sound/asound.h | 8 +++++
include/sound/pcm.h | 22 +++++++-----
include/sound/timer.h | 4 +--
include/uapi/sound/asound.h | 53 +++++++++++++++++++++--------
sound/core/Kconfig | 11 ++++++
sound/core/compat.h | 11 ++++++
sound/core/pcm.c | 3 ++
sound/core/pcm_compat.c | 70 ++++++++++++++++++++++-----------------
sound/core/pcm_lib.c | 36 ++++++++++++--------
sound/core/pcm_native.c | 25 ++++++++++----
sound/core/rawmidi_compat.c | 12 +++----
sound/core/timer.c | 28 ++++++++--------
sound/core/timer_compat.c | 4 ++-
sound/pci/hda/hda_controller.c | 14 +++++---
sound/soc/intel/skylake/skl-pcm.c | 4 +--
15 files changed, 203 insertions(+), 102 deletions(-)
create mode 100644 sound/core/compat.h
--
2.9.0
