Y2038

y2038@lists.linaro.org

1 participants
1128 discussions

[PATCH] ia64: efi: use timespec64 for persistent clock

by Arnd Bergmann

We have a generic read_persistent_clock64 interface now, and can change the ia64 implementation to provide that instead of read_persistent_clock. The main point of this is to avoid the use of struct timespec in the global efi.h, which would cause build errors as soon as we want to build a kernel without 'struct timespec' defined on 32-bit architectures. Aside from this, we get a little closer to removing the __weak read_persistent_clock() definition, which relies on converting all architectures to provide read_persistent_clock64 instead. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- arch/ia64/kernel/efi.c | 4 ++-- arch/ia64/kernel/time.c | 2 +- include/linux/efi.h | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c index 3b7a60e40e8a..121295637d0d 100644 --- a/arch/ia64/kernel/efi.c +++ b/arch/ia64/kernel/efi.c @@ -236,7 +236,7 @@ STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id) STUB_RESET_SYSTEM(virt, id) void -efi_gettimeofday (struct timespec *ts) +efi_gettimeofday (struct timespec64 *ts) { efi_time_t tm; @@ -245,7 +245,7 @@ efi_gettimeofday (struct timespec *ts) return; } - ts->tv_sec = mktime(tm.year, tm.month, tm.day, + ts->tv_sec = mktime64(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second); ts->tv_nsec = tm.nanosecond; } diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c index c8dbe2acd735..6f892b94e906 100644 --- a/arch/ia64/kernel/time.c +++ b/arch/ia64/kernel/time.c @@ -355,7 +355,7 @@ static struct irqaction timer_irqaction = { .name = "timer" }; -void read_persistent_clock(struct timespec *ts) +void read_persistent_clock64(struct timespec64 *ts) { efi_gettimeofday(ts); } diff --git a/include/linux/efi.h b/include/linux/efi.h index 9a53a557acff..dca8810d6b49 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -937,7 +937,7 @@ extern void efi_init (void); extern void *efi_get_pal_addr (void); extern void efi_map_pal_code (void); extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg); -extern void efi_gettimeofday (struct timespec *ts); +extern void efi_gettimeofday (struct timespec64 *ts); extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ #ifdef CONFIG_X86 extern void efi_late_init(void); -- 2.9.0

8 years, 6 months

[PATCH 00/21] Delete CURRENT_TIME and CURRENT_TIME_SEC macros

by Deepa Dinamani

The series is aimed at getting rid of CURRENT_TIME and CURRENT_TIME_SEC macros. The macros are not y2038 safe. There is no plan to transition them into being y2038 safe. ktime_get_* api's can be used in their place. And, these are y2038 safe. All filesystem timestamps use current_fs_time() for the right granularity as mentioned in the respective commit texts of patches. This series also serves as a preparatory series to transition vfs to 64 bit timestamps as outlined here: https://lkml.org/lkml/2016/2/12/104 . As per Linus's suggestion in https://lkml.org/lkml/2016/5/24/663 , all the inode timestamp changes have been squashed into a single patch. Also, current_fs_time() now is used as a single generic filesystem timestamp api. Posting all patches together in a bigger series so that the big picture is clear. As per the suggestion in https://lwn.net/Articles/672598/ , CURRENT_TIME macro bug fixes are being handled in a series separate from transitioning vfs to use 64 bit timestamps. Some reviewers have requested not to change line wrapping only for the longer function call names, so checkpatch warnings for such cases are ignored in the patch series. Deepa Dinamani (21): fs: Replace CURRENT_TIME_SEC with current_fs_time() fs: ext4: Use current_fs_time() for inode timestamps fs: ubifs: Use current_fs_time() for inode timestamps fs: Replace CURRENT_TIME with current_fs_time() for inode timestamps fs: jfs: Replace CURRENT_TIME_SEC by current_fs_time() fs: udf: Replace CURRENT_TIME with current_fs_time() fs: cifs: Replace CURRENT_TIME by current_fs_time() fs: cifs: Replace CURRENT_TIME with ktime_get_real_ts() fs: cifs: Replace CURRENT_TIME by get_seconds fs: f2fs: Use ktime_get_real_seconds for sit_info times drivers: staging: lustre: Replace CURRENT_TIME with current_fs_time() block: rbd: Replace non inode CURRENT_TIME with current_fs_time() fs: ocfs2: Use time64_t to represent orphan scan times fs: ocfs2: Replace CURRENT_TIME with ktime_get_real_seconds() time: Add time64_to_tm() fnic: Use time64_t to represent trace timestamps audit: Use timespec64 to represent audit timestamps fs: nfs: Make nfs boot time y2038 safe libceph: Remove CURRENT_TIME references libceph: Replace CURRENT_TIME with ktime_get_real_ts time: Delete CURRENT_TIME_SEC and CURRENT_TIME macro arch/powerpc/platforms/cell/spufs/inode.c | 2 +- arch/s390/hypfs/inode.c | 4 +-- drivers/block/rbd.c | 2 +- drivers/infiniband/hw/qib/qib_fs.c | 2 +- drivers/misc/ibmasm/ibmasmfs.c | 2 +- drivers/oprofile/oprofilefs.c | 2 +- drivers/scsi/fnic/fnic_trace.c | 4 +-- drivers/scsi/fnic/fnic_trace.h | 2 +- drivers/staging/lustre/lustre/llite/llite_lib.c | 17 ++++++----- drivers/staging/lustre/lustre/llite/namei.c | 4 +-- drivers/staging/lustre/lustre/mdc/mdc_reint.c | 6 ++-- .../lustre/lustre/obdclass/linux/linux-obdo.c | 6 ++-- drivers/staging/lustre/lustre/obdclass/obdo.c | 6 ++-- drivers/staging/lustre/lustre/osc/osc_io.c | 2 +- drivers/usb/core/devio.c | 19 ++++++------ drivers/usb/gadget/function/f_fs.c | 2 +- drivers/usb/gadget/legacy/inode.c | 2 +- fs/9p/vfs_inode.c | 2 +- fs/adfs/inode.c | 2 +- fs/affs/amigaffs.c | 6 ++-- fs/affs/inode.c | 2 +- fs/afs/inode.c | 3 +- fs/autofs4/inode.c | 2 +- fs/autofs4/root.c | 19 +++++++----- fs/bfs/dir.c | 18 ++++++----- fs/btrfs/inode.c | 2 +- fs/cifs/cifsencrypt.c | 4 ++- fs/cifs/cifssmb.c | 10 +++---- fs/cifs/inode.c | 15 +++++----- fs/coda/dir.c | 2 +- fs/coda/file.c | 2 +- fs/coda/inode.c | 2 +- fs/devpts/inode.c | 6 ++-- fs/efivarfs/inode.c | 2 +- fs/exofs/dir.c | 9 +++--- fs/exofs/inode.c | 7 +++-- fs/exofs/namei.c | 6 ++-- fs/ext2/acl.c | 2 +- fs/ext2/dir.c | 6 ++-- fs/ext2/ialloc.c | 2 +- fs/ext2/inode.c | 4 +-- fs/ext2/ioctl.c | 5 ++-- fs/ext2/namei.c | 6 ++-- fs/ext2/super.c | 2 +- fs/ext2/xattr.c | 2 +- fs/ext4/acl.c | 2 +- fs/ext4/ext4.h | 6 ---- fs/ext4/extents.c | 10 +++---- fs/ext4/ialloc.c | 2 +- fs/ext4/inline.c | 4 +-- fs/ext4/inode.c | 6 ++-- fs/ext4/ioctl.c | 8 ++--- fs/ext4/namei.c | 24 ++++++++------- fs/ext4/super.c | 2 +- fs/ext4/xattr.c | 2 +- fs/f2fs/dir.c | 8 ++--- fs/f2fs/file.c | 8 ++--- fs/f2fs/inline.c | 2 +- fs/f2fs/namei.c | 12 ++++---- fs/f2fs/segment.c | 2 +- fs/f2fs/segment.h | 5 ++-- fs/f2fs/xattr.c | 2 +- fs/fat/dir.c | 2 +- fs/fat/file.c | 4 +-- fs/fat/inode.c | 2 +- fs/fat/namei_msdos.c | 13 ++++---- fs/fat/namei_vfat.c | 10 +++---- fs/fuse/control.c | 2 +- fs/gfs2/bmap.c | 8 ++--- fs/gfs2/dir.c | 12 ++++---- fs/gfs2/inode.c | 8 ++--- fs/gfs2/quota.c | 2 +- fs/gfs2/xattr.c | 8 ++--- fs/hfs/catalog.c | 8 ++--- fs/hfs/dir.c | 2 +- fs/hfs/inode.c | 2 +- fs/hfsplus/catalog.c | 8 ++--- fs/hfsplus/dir.c | 6 ++-- fs/hfsplus/inode.c | 2 +- fs/hfsplus/ioctl.c | 2 +- fs/hugetlbfs/inode.c | 10 +++---- fs/jffs2/acl.c | 2 +- fs/jffs2/fs.c | 2 +- fs/jfs/acl.c | 2 +- fs/jfs/inode.c | 5 ++-- fs/jfs/ioctl.c | 4 +-- fs/jfs/jfs_inode.c | 2 +- fs/jfs/namei.c | 35 ++++++++++++---------- fs/jfs/super.c | 2 +- fs/jfs/xattr.c | 2 +- fs/libfs.c | 14 ++++----- fs/logfs/dir.c | 6 ++-- fs/logfs/file.c | 2 +- fs/logfs/inode.c | 3 +- fs/logfs/readwrite.c | 4 +-- fs/minix/bitmap.c | 2 +- fs/minix/dir.c | 12 ++++---- fs/minix/itree_common.c | 4 +-- fs/minix/namei.c | 4 +-- fs/nfs/client.c | 2 +- fs/nfs/netns.h | 2 +- fs/nilfs2/dir.c | 6 ++-- fs/nilfs2/inode.c | 4 +-- fs/nilfs2/ioctl.c | 2 +- fs/nilfs2/namei.c | 6 ++-- fs/nsfs.c | 5 ++-- fs/ocfs2/acl.c | 2 +- fs/ocfs2/alloc.c | 2 +- fs/ocfs2/aops.c | 2 +- fs/ocfs2/cluster/heartbeat.c | 2 +- fs/ocfs2/dir.c | 4 +-- fs/ocfs2/dlmfs/dlmfs.c | 4 +-- fs/ocfs2/file.c | 12 ++++---- fs/ocfs2/inode.c | 2 +- fs/ocfs2/journal.c | 4 +-- fs/ocfs2/move_extents.c | 2 +- fs/ocfs2/namei.c | 17 ++++++----- fs/ocfs2/ocfs2.h | 2 +- fs/ocfs2/refcounttree.c | 4 +-- fs/ocfs2/super.c | 2 +- fs/ocfs2/xattr.c | 2 +- fs/omfs/dir.c | 4 +-- fs/omfs/inode.c | 2 +- fs/openpromfs/inode.c | 2 +- fs/orangefs/file.c | 2 +- fs/orangefs/inode.c | 2 +- fs/orangefs/namei.c | 6 ++-- fs/pipe.c | 5 ++-- fs/posix_acl.c | 2 +- fs/proc/base.c | 2 +- fs/proc/inode.c | 4 +-- fs/proc/proc_sysctl.c | 2 +- fs/proc/self.c | 2 +- fs/proc/thread_self.c | 2 +- fs/pstore/inode.c | 2 +- fs/ramfs/inode.c | 12 ++++---- fs/reiserfs/inode.c | 2 +- fs/reiserfs/ioctl.c | 4 +-- fs/reiserfs/namei.c | 14 ++++----- fs/reiserfs/stree.c | 6 ++-- fs/reiserfs/super.c | 2 +- fs/reiserfs/xattr.c | 2 +- fs/reiserfs/xattr_acl.c | 2 +- fs/sysv/dir.c | 6 ++-- fs/sysv/ialloc.c | 2 +- fs/sysv/itree.c | 4 +-- fs/sysv/namei.c | 4 +-- fs/tracefs/inode.c | 2 +- fs/ubifs/dir.c | 10 +++---- fs/ubifs/file.c | 12 ++++---- fs/ubifs/ioctl.c | 2 +- fs/ubifs/misc.h | 10 ------- fs/ubifs/sb.c | 18 ++++++++--- fs/ubifs/xattr.c | 6 ++-- fs/udf/super.c | 4 +-- fs/ufs/dir.c | 6 ++-- fs/ufs/ialloc.c | 8 +++-- fs/ufs/inode.c | 6 ++-- fs/ufs/namei.c | 6 ++-- include/linux/audit.h | 4 +-- include/linux/time.h | 18 ++++++++--- ipc/mqueue.c | 21 ++++++------- kernel/audit.c | 10 +++---- kernel/audit.h | 2 +- kernel/auditsc.c | 6 ++-- kernel/bpf/inode.c | 2 +- kernel/time/timeconv.c | 11 +++---- mm/shmem.c | 26 ++++++++-------- net/ceph/messenger.c | 6 ++-- net/ceph/osd_client.c | 4 +-- net/sunrpc/rpc_pipe.c | 2 +- security/inode.c | 2 +- security/selinux/selinuxfs.c | 2 +- 173 files changed, 494 insertions(+), 458 deletions(-) -- 1.9.1 Cc: Anna Schumaker <anna.schumaker(a)netapp.com> Cc: Anton Vorontsov <anton(a)enomsg.org> Cc: Benny Halevy <bhalevy(a)primarydata.com> Cc: Boaz Harrosh <ooo(a)electrozaur.com> Cc: Changman Lee <cm224.lee(a)samsung.com> Cc: Chris Mason <clm(a)fb.com> Cc: Colin Cross <ccross(a)android.com> Cc: Dave Kleikamp <shaggy(a)kernel.org> Cc: "David S. Miller" <davem(a)davemloft.net> Cc: David Sterba <dsterba(a)suse.com> Cc: Eric Van Hensbergen <ericvh(a)gmail.com> Cc: Felipe Balbi <balbi(a)kernel.org> Cc: Hugh Dickins <hughd(a)google.com> Cc: Ian Kent <raven(a)themaw.net> Cc: Jaegeuk Kim <jaegeuk(a)kernel.org> Cc: Joern Engel <joern(a)logfs.org> Cc: Josef Bacik <jbacik(a)fb.com> Cc: Kees Cook <keescook(a)chromium.org> Cc: Latchesar Ionkov <lucho(a)ionkov.net> Cc: Matt Fleming <matt(a)codeblueprint.co.uk> Cc: Matthew Garrett <matthew.garrett(a)nebula.com> Cc: Miklos Szeredi <miklos(a)szeredi.hu> Cc: Nadia Yvette Chambers <nyc(a)holomorphy.com> Cc: Prasad Joshi <prasadjoshi.linux(a)gmail.com> Cc: Robert Richter <rric(a)kernel.org> Cc: Ron Minnich <rminnich(a)sandia.gov> Cc: Tony Luck <tony.luck(a)intel.com> Cc: Trond Myklebust <trond.myklebust(a)primarydata.com> Cc: autofs(a)vger.kernel.org Cc: cluster-devel(a)redhat.com Cc: jfs-discussion(a)lists.sourceforge.net Cc: linux-btrfs(a)vger.kernel.org Cc: linux-efi(a)vger.kernel.org Cc: linux-f2fs-devel(a)lists.sourceforge.net Cc: linux-fsdevel(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Cc: linux-mm(a)kvack.org Cc: linux-nfs(a)vger.kernel.org Cc: linux-nilfs(a)vger.kernel.org Cc: linuxppc-dev(a)lists.ozlabs.org Cc: linux-rdma(a)vger.kernel.org Cc: linux-s390(a)vger.kernel.org Cc: linux-security-module(a)vger.kernel.org Cc: linux-usb(a)vger.kernel.org Cc: logfs(a)logfs.org Cc: netdev(a)vger.kernel.org Cc: ocfs2-devel(a)oss.oracle.com Cc: oprofile-list(a)lists.sf.net Cc: osd-dev(a)open-osd.org Cc: selinux(a)tycho.nsa.gov Cc: v9fs-developer(a)lists.sourceforge.net

8 years, 6 months

[PATCH] ALSA: seq_timer: use monotonic times internally

by Arnd Bergmann

The sequencer client manager reports timestamps in units of unsigned 32-bit seconds/nanoseconds, but that does not suffer from the y2038 overflow because it stores only the delta since the 'last_update' time was recorded. However, the use of the do_gettimeofday() function is problematic and we have to replace it to avoid the overflow on on 32-bit architectures. This uses 'struct timespec64' to record 'last_update', and changes the code to use monotonic timestamps that do not suffer from leap seconds and settimeofday updates. As a side-effect, the code can now use the timespec64_sub() helper and become more readable and also avoid a multiplication to convert from microseconds to nanoseconds. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- sound/core/seq/seq_timer.c | 23 +++++++++-------------- sound/core/seq/seq_timer.h | 2 +- 2 files changed, 10 insertions(+), 15 deletions(-) diff --git a/sound/core/seq/seq_timer.c b/sound/core/seq/seq_timer.c index 293104926098..dcc102813aef 100644 --- a/sound/core/seq/seq_timer.c +++ b/sound/core/seq/seq_timer.c @@ -165,7 +165,7 @@ static void snd_seq_timer_interrupt(struct snd_timer_instance *timeri, snd_seq_timer_update_tick(&tmr->tick, resolution); /* register actual time of this timer update */ - do_gettimeofday(&tmr->last_update); + ktime_get_ts64(&tmr->last_update); spin_unlock_irqrestore(&tmr->lock, flags); @@ -392,7 +392,7 @@ static int seq_timer_start(struct snd_seq_timer *tmr) return -EINVAL; snd_timer_start(tmr->timeri, tmr->ticks); tmr->running = 1; - do_gettimeofday(&tmr->last_update); + ktime_get_ts64(&tmr->last_update); return 0; } @@ -420,7 +420,7 @@ static int seq_timer_continue(struct snd_seq_timer *tmr) } snd_timer_start(tmr->timeri, tmr->ticks); tmr->running = 1; - do_gettimeofday(&tmr->last_update); + ktime_get_ts64(&tmr->last_update); return 0; } @@ -444,17 +444,12 @@ snd_seq_real_time_t snd_seq_timer_get_cur_time(struct snd_seq_timer *tmr) spin_lock_irqsave(&tmr->lock, flags); cur_time = tmr->cur_time; if (tmr->running) { - struct timeval tm; - int usec; - do_gettimeofday(&tm); - usec = (int)(tm.tv_usec - tmr->last_update.tv_usec); - if (usec < 0) { - cur_time.tv_nsec += (1000000 + usec) * 1000; - cur_time.tv_sec += tm.tv_sec - tmr->last_update.tv_sec - 1; - } else { - cur_time.tv_nsec += usec * 1000; - cur_time.tv_sec += tm.tv_sec - tmr->last_update.tv_sec; - } + struct timespec64 tm; + + ktime_get_ts64(&tm); + tm = timespec64_sub(tm, tmr->last_update); + cur_time.tv_nsec = tm.tv_nsec; + cur_time.tv_sec = tm.tv_sec; snd_seq_sanity_real_time(&cur_time); } spin_unlock_irqrestore(&tmr->lock, flags); diff --git a/sound/core/seq/seq_timer.h b/sound/core/seq/seq_timer.h index 88dfb71805ae..9506b661fe5b 100644 --- a/sound/core/seq/seq_timer.h +++ b/sound/core/seq/seq_timer.h @@ -52,7 +52,7 @@ struct snd_seq_timer { unsigned int skew; unsigned int skew_base; - struct timeval last_update; /* time of last clock update, used for interpolation */ + struct timespec64 last_update; /* time of last clock update, used for interpolation */ spinlock_t lock; }; -- 2.9.0

8 years, 6 months

[PATCH] timer: avoid using timespec

by Arnd Bergmann

The tstats_show() function prints a ktime_t variable by converting it to struct timespec first. The algorithm is ok, but we want to stop using timespec in general because of the 32-bit time_t overflow problem. This changes the code to use struct timespec64, without any functional change. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- kernel/time/timer_stats.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c index 1adecb4b87c8..087204c733eb 100644 --- a/kernel/time/timer_stats.c +++ b/kernel/time/timer_stats.c @@ -279,7 +279,7 @@ static void print_name_offset(struct seq_file *m, unsigned long addr) static int tstats_show(struct seq_file *m, void *v) { - struct timespec period; + struct timespec64 period; struct entry *entry; unsigned long ms; long events = 0; @@ -295,11 +295,11 @@ static int tstats_show(struct seq_file *m, void *v) time = ktime_sub(time_stop, time_start); - period = ktime_to_timespec(time); + period = ktime_to_timespec64(time); ms = period.tv_nsec / 1000000; seq_puts(m, "Timer Stats Version: v0.3\n"); - seq_printf(m, "Sample period: %ld.%03ld s\n", period.tv_sec, ms); + seq_printf(m, "Sample period: %ld.%03ld s\n", (long)period.tv_sec, ms); if (atomic_read(&overflow_count)) seq_printf(m, "Overflow: %d entries\n", atomic_read(&overflow_count)); seq_printf(m, "Collection: %s\n", timer_stats_active ? "active" : "inactive"); -- 2.9.0

8 years, 6 months

[PATCH] time: avoid timespec in udelay_test

by Arnd Bergmann

udelay_test_single() uses ktime_get_ts() to get two timespec values and calculate the difference between them, while udelay_test_show() uses the same to printk() the current monotonic time. Both of these are y2038 safe on all machines, but we want to get rid of struct timespec anyway, so this converts the code to use ktime_get_ns() and ktime_get_ts64() respectively. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- kernel/time/test_udelay.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/kernel/time/test_udelay.c b/kernel/time/test_udelay.c index e622ba365a13..b0928ab3270f 100644 --- a/kernel/time/test_udelay.c +++ b/kernel/time/test_udelay.c @@ -43,13 +43,13 @@ static int udelay_test_single(struct seq_file *s, int usecs, uint32_t iters) int allowed_error_ns = usecs * 5; for (i = 0; i < iters; ++i) { - struct timespec ts1, ts2; + s64 kt1, kt2; int time_passed; - ktime_get_ts(&ts1); + kt1 = ktime_get_ns(); udelay(usecs); - ktime_get_ts(&ts2); - time_passed = timespec_to_ns(&ts2) - timespec_to_ns(&ts1); + kt2 = ktime_get_ns(); + time_passed = kt2 - kt1; if (i == 0 || time_passed < min) min = time_passed; @@ -87,11 +87,11 @@ static int udelay_test_show(struct seq_file *s, void *v) if (usecs > 0 && iters > 0) { return udelay_test_single(s, usecs, iters); } else if (usecs == 0) { - struct timespec ts; + struct timespec64 ts; - ktime_get_ts(&ts); - seq_printf(s, "udelay() test (lpj=%ld kt=%ld.%09ld)\n", - loops_per_jiffy, ts.tv_sec, ts.tv_nsec); + ktime_get_ts64(&ts); + seq_printf(s, "udelay() test (lpj=%ld kt=%lld.%09ld)\n", + loops_per_jiffy, (s64)ts.tv_sec, ts.tv_nsec); seq_puts(s, "usage:\n"); seq_puts(s, "echo USECS [ITERS] > " DEBUGFS_FILENAME "\n"); seq_puts(s, "cat " DEBUGFS_FILENAME "\n"); -- 2.9.0

8 years, 6 months

[PATCH] procfs: avoid 32-bit time_t in /proc/*/stat

by Arnd Bergmann

/proc/stat shows (among lots of other things) the current boottime (i.e. number of seconds since boot). While a 32-bit number is sufficient for this particular case, we want to get rid of the 'struct timespec' suffers from a 32-bit overflow in 2038. This changes the code to use a struct timespec64, which is known to be safe in all cases. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- fs/proc/stat.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/fs/proc/stat.c b/fs/proc/stat.c index 510413eb25b8..7907e456ac4f 100644 --- a/fs/proc/stat.c +++ b/fs/proc/stat.c @@ -80,19 +80,17 @@ static u64 get_iowait_time(int cpu) static int show_stat(struct seq_file *p, void *v) { int i, j; - unsigned long jif; u64 user, nice, system, idle, iowait, irq, softirq, steal; u64 guest, guest_nice; u64 sum = 0; u64 sum_softirq = 0; unsigned int per_softirq_sums[NR_SOFTIRQS] = {0}; - struct timespec boottime; + struct timespec64 boottime; user = nice = system = idle = iowait = irq = softirq = steal = 0; guest = guest_nice = 0; - getboottime(&boottime); - jif = boottime.tv_sec; + getboottime64(&boottime); for_each_possible_cpu(i) { user += kcpustat_cpu(i).cpustat[CPUTIME_USER]; @@ -163,12 +161,12 @@ static int show_stat(struct seq_file *p, void *v) seq_printf(p, "\nctxt %llu\n" - "btime %lu\n" + "btime %llu\n" "processes %lu\n" "procs_running %lu\n" "procs_blocked %lu\n", nr_context_switches(), - (unsigned long)jif, + (unsigned long long)boottime.tv_sec, total_forks, nr_running(), nr_iowait()); -- 2.9.0

8 years, 6 months

[PATCH] initramfs: use vfs_stat/lstat directly

by Arnd Bergmann

sys_newlstat is a system call implementation that is meant for user space, and that copies kernel-internal data structure to the user format, which is not needed for in-kernel users. Further, as we rearrange the system call implementation so we can extend it with 64-bit time_t, the prototype for sys_newlstat changes. This changes the initramfs code to use vfs_lstat directly, to get it out of the way of the time_t changes, and make it slightly more efficient in the process. Along the same lines we also replace sys_stat and sys_stat64 with vfs_stat. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- init/do_mounts.h | 22 ++++------------------ init/initramfs.c | 12 ++++++------ 2 files changed, 10 insertions(+), 24 deletions(-) diff --git a/init/do_mounts.h b/init/do_mounts.h index 067af1d9e8b6..282d65bfd674 100644 --- a/init/do_mounts.h +++ b/init/do_mounts.h @@ -19,29 +19,15 @@ static inline int create_dev(char *name, dev_t dev) return sys_mknod(name, S_IFBLK|0600, new_encode_dev(dev)); } -#if BITS_PER_LONG == 32 static inline u32 bstat(char *name) { - struct stat64 stat; - if (sys_stat64(name, &stat) != 0) + struct kstat stat; + if (vfs_stat(name, &stat) != 0) return 0; - if (!S_ISBLK(stat.st_mode)) + if (!S_ISBLK(stat.mode)) return 0; - if (stat.st_rdev != (u32)stat.st_rdev) - return 0; - return stat.st_rdev; -} -#else -static inline u32 bstat(char *name) -{ - struct stat stat; - if (sys_newstat(name, &stat) != 0) - return 0; - if (!S_ISBLK(stat.st_mode)) - return 0; - return stat.st_rdev; + return stat.rdev; } -#endif #ifdef CONFIG_BLK_DEV_RAM diff --git a/init/initramfs.c b/init/initramfs.c index b32ad7d97ac9..ce7a04435996 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -311,10 +311,10 @@ static int __init maybe_link(void) static void __init clean_path(char *path, umode_t fmode) { - struct stat st; + struct kstat st; - if (!sys_newlstat(path, &st) && (st.st_mode ^ fmode) & S_IFMT) { - if (S_ISDIR(st.st_mode)) + if (!vfs_lstat(path, &st) && (st.mode ^ fmode) & S_IFMT) { + if (S_ISDIR(st.mode)) sys_rmdir(path); else sys_unlink(path); @@ -580,13 +580,13 @@ static void __init clean_rootfs(void) num = sys_getdents64(fd, dirp, BUF_SIZE); while (num > 0) { while (num > 0) { - struct stat st; + struct kstat st; int ret; - ret = sys_newlstat(dirp->d_name, &st); + ret = vfs_lstat(dirp->d_name, &st); WARN_ON_ONCE(ret); if (!ret) { - if (S_ISDIR(st.st_mode)) + if (S_ISDIR(st.mode)) sys_rmdir(dirp->d_name); else sys_unlink(dirp->d_name); -- 2.9.0

8 years, 6 months

[PATCH] staging: comedi: avoid using timeval

by Arnd Bergmann

Comedi uses 32-bit seconds for its timestamps, on both 32-bit and 64-bit machines. For all I can tell, this was originally meant as a 'timespec', which would overflow in 2038 because of the use of a signed 'long' on 32-bit machines, but it is now used as an array of two unsigned 'lsampl_t' values in comedilib, which will only overflow in 2106, on both 32-bit and 64-bit machines. In an effort to get rid of all uses of 'struct timeval' in the kernel, this replaces the internal code with a call to ktime_get_real_ts64() and a comment at the location of the conversion. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- drivers/staging/comedi/comedi_fops.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c index 629080f39db0..10a8a9245925 100644 --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -1256,16 +1256,17 @@ static int parse_insn(struct comedi_device *dev, struct comedi_insn *insn, switch (insn->insn) { case INSN_GTOD: { - struct timeval tv; + struct timespec64 tv; if (insn->n != 2) { ret = -EINVAL; break; } - do_gettimeofday(&tv); - data[0] = tv.tv_sec; - data[1] = tv.tv_usec; + ktime_get_real_ts64(&tv); + /* unsigned data safe until 2106 */ + data[0] = (unsigned int)tv.tv_sec; + data[1] = tv.tv_nsec / NSEC_PER_USEC; ret = 2; break; -- 2.9.0

8 years, 6 months

[PATCH] ata: fix "ering" sysfs time printing

by Arnd Bergmann

The sysfs file for the libata error handling has multiple issues in the way it prints time stamps: * it prints a 9-digit nanosecond value using a %06lu format string, which drops some leading zeroes * it converts a 64-bit jiffes value to a timespec using jiffies_to_timespec(), which takes a 'long' argument, so the result is wrong after a jiffies overflow (49 days). * we try to avoid using timespec because that generally overflows in 2038, although this particular usage is ok. This replaces the jiffies_to_timespec call with an open-coded implementation that gets it right. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- drivers/ata/libata-transport.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c index e2d94972962d..7ef16c085058 100644 --- a/drivers/ata/libata-transport.c +++ b/drivers/ata/libata-transport.c @@ -495,12 +495,13 @@ struct ata_show_ering_arg { static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) { struct ata_show_ering_arg* arg = void_arg; - struct timespec time; + u64 seconds; + u32 rem; - jiffies_to_timespec(ent->timestamp,&time); + seconds = div_u64_rem(ent->timestamp, HZ, &rem); arg->written += sprintf(arg->buf + arg->written, - "[%5lu.%06lu]", - time.tv_sec, time.tv_nsec); + "[%5llu.%09lu]", seconds, + rem * NSEC_PER_SEC / HZ); arg->written += get_ata_err_names(ent->err_mask, arg->buf + arg->written); return 0; -- 2.9.0

8 years, 6 months

[PATCH] staging: comedi: avoid using timeval

by Arnd Bergmann

It depends on user space whether this is safe or not: if programs interpret the data as a signed time_t value, they will be broken in y2038, and we have to redesign the entire interface. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> --- drivers/staging/comedi/comedi_fops.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c index 629080f39db0..fe50d1f823c6 100644 --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -1256,16 +1256,17 @@ static int parse_insn(struct comedi_device *dev, struct comedi_insn *insn, switch (insn->insn) { case INSN_GTOD: { - struct timeval tv; + struct timespec64 tv; if (insn->n != 2) { ret = -EINVAL; break; } - do_gettimeofday(&tv); + ktime_get_real_ts64(&tv); data[0] = tv.tv_sec; - data[1] = tv.tv_usec; + /* unsigned data safe until 2106 */ + data[1] = tv.tv_nsec / NSEC_PER_USEC; ret = 2; break; -- 2.9.0

8 years, 6 months

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