Y2038

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Re: [Y2038] Sign This document

by Bamvor Zhang Jian

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8 years, 9 months

[PATCH v3] misc: ibmasm: Replace timeval with timespec64

by Amitoj Kaur Chawla

This patch replaces timeval with timespec64 as 32 bit 'struct timeval' will not give current time beyond 2038. The patch changes the code to use ktime_get_real_ts64() which returns a 'struct timespec64' instead of do_gettimeofday() which returns a 'struct timeval' This patch also alters the format strings in sprintf() for now.tv_sec and now.tv_nsec to incorporate 'long long' on 32 bit architectures and leading zeroes respectively. Signed-off-by: Amitoj Kaur Chawla <amitoj1606(a)gmail.com> Reviewed-by: Arnd Bergmann <arnd(a)arndb.de> --- Changes in v2: -change format string of now.tv_sec to '%llu' -change format string of now.tv_nsec to '%.08lu' Changes in v3: -Replace tv_usec with tv_nsec, error made in v2 -Build tested drivers/misc/ibmasm/ibmasm.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/misc/ibmasm/ibmasm.h b/drivers/misc/ibmasm/ibmasm.h index 9b08344..82380ae 100644 --- a/drivers/misc/ibmasm/ibmasm.h +++ b/drivers/misc/ibmasm/ibmasm.h @@ -34,6 +34,7 @@ #include <linux/kref.h> #include <linux/device.h> #include <linux/input.h> +#include <linux/time64.h> /* Driver identification */ #define DRIVER_NAME "ibmasm" @@ -53,9 +54,10 @@ extern int ibmasm_debug; static inline char *get_timestamp(char *buf) { - struct timeval now; - do_gettimeofday(&now); - sprintf(buf, "%lu.%lu", now.tv_sec, now.tv_usec); + struct timespec64 now; + ktime_get_real_ts64(&now); + sprintf(buf, "%llu.%.08lu", (long long)now.tv_sec, + now.tv_nsec / NSEC_PER_USEC); return buf; } -- 1.9.1

8 years, 9 months

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8 years, 10 months

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8 years, 10 months

Re: [Y2038] [RFC 02/15] vfs: Change all structures to support 64 bit time

by Deepa Dinamani

Based on the discussion, here is how I propose to proceed: 1. Series for timestamp range check and clamping 2. Bug fixing patches like change all CURRENT_TIME use cases to current_fs_time() 3. Patches for vfs to use timespec64 internally (maybe a series, if required) 4. Patches that change all fs that use vfs APIs using timestamp arguments (not a series) 5. Change individual fs to use timespec64 (not a series) 6. Change back whatever time conversion APIs left in vfs or individual fs (maybe a series, if required) So, I don't see a need for submitting another series as all the changes now are handled on a case by case basis and no longer have a generic theme. If everyone's in sync then I can proceed with the above plan. -Deepa

8 years, 10 months

[PATCH, RESEND 2] qla2xxx: Remove use of 'struct timeval'

by Arnd Bergmann

struct register_host_info stores a 64-bit UTC system time timestamp. This patch removes the use of 'struct timeval' to obtain that timestamp as its tv_sec value will overflow on 32-bit systems in year 2038 beyond. The patch uses ktime_get_real_seconds() which returns a 64-bit seconds value. Signed-off-by: Tina Ruchandani <ruchandani.tina(a)gmail.com> Reviewed-by: Johannes Thumshirn <jthumshirn(a)suse.de> Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> diff --git a/drivers/scsi/qla2xxx/qla_mr.c b/drivers/scsi/qla2xxx/qla_mr.c index b5029e543b91..15dff7099955 100644 --- a/drivers/scsi/qla2xxx/qla_mr.c +++ b/drivers/scsi/qla2xxx/qla_mr.c @@ -6,6 +6,7 @@ */ #include "qla_def.h" #include <linux/delay.h> +#include <linux/ktime.h> #include <linux/pci.h> #include <linux/ratelimit.h> #include <linux/vmalloc.h> @@ -1812,7 +1813,6 @@ qlafx00_fx_disc(scsi_qla_host_t *vha, fc_port_t *fcport, uint16_t fx_type) struct host_system_info *phost_info; struct register_host_info *preg_hsi; struct new_utsname *p_sysid = NULL; - struct timeval tv; sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL); if (!sp) @@ -1886,8 +1886,7 @@ qlafx00_fx_disc(scsi_qla_host_t *vha, fc_port_t *fcport, uint16_t fx_type) p_sysid->domainname, DOMNAME_LENGTH); strncpy(phost_info->hostdriver, QLA2XXX_VERSION, VERSION_LENGTH); - do_gettimeofday(&tv); - preg_hsi->utc = (uint64_t)tv.tv_sec; + preg_hsi->utc = (uint64_t)ktime_get_real_seconds(); ql_dbg(ql_dbg_init, vha, 0x0149, "ISP%04X: Host registration with firmware\n", ha->pdev->device);

8 years, 10 months

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8 years, 10 months

[PATCH RESEND] AFS: Correctly use 64-bit time for UUID

by Arnd Bergmann

UUID calculation uses 'struct timespec' whose seconds will overflow in year 2038 and beyond for 32-bit systems. This patch removes the dependency on 'struct timespec' by using ktime_get_real(). While the patch does not fix a 'bug' as such, it is part of a larger effort to remove instances of 'struct timespec' and other data-structures suffering from y2038 problem from the kernel. Suggested-by: Arnd Bergmann <arnd(a)arndb.de> Signed-off-by: Tina Ruchandani <ruchandani.tina(a)gmail.com> Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> diff --git a/fs/afs/main.c b/fs/afs/main.c index 35de0c04729f..129ff432391c 100644 --- a/fs/afs/main.c +++ b/fs/afs/main.c @@ -14,6 +14,7 @@ #include <linux/init.h> #include <linux/completion.h> #include <linux/sched.h> +#include <linux/ktime.h> #include "internal.h" MODULE_DESCRIPTION("AFS Client File System"); @@ -37,7 +38,6 @@ struct workqueue_struct *afs_wq; */ static int __init afs_get_client_UUID(void) { - struct timespec ts; u64 uuidtime; u16 clockseq; int ret; @@ -48,9 +48,7 @@ static int __init afs_get_client_UUID(void) if (ret < 0) return ret; - getnstimeofday(&ts); - uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10; - uuidtime += ts.tv_nsec / 100; + uuidtime = ktime_divns(ktime_get_real(), 100); uuidtime += AFS_UUID_TO_UNIX_TIME; afs_uuid.time_low = uuidtime; afs_uuid.time_mid = uuidtime >> 32;

8 years, 10 months

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8 years, 10 months

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8 years, 10 months

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