Y2038

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1132 discussions

[PATCH 1/3] scsi: bfa: Remove unnecessary use of struct timeval

by Amitoj Kaur Chawla

Since aen_tv variable is not used anywhere we can remove the variable and the do_gettimeofday() function referencing it. This problem was found while removing 'struct timeval' from this driver to solve the y2038 problem for 32 bit systems. Signed-off-by: Amitoj Kaur Chawla <amitoj1606(a)gmail.com> --- drivers/scsi/bfa/bfa_defs_svc.h | 1 - drivers/scsi/bfa/bfad_im.h | 1 - 2 files changed, 2 deletions(-) diff --git a/drivers/scsi/bfa/bfa_defs_svc.h b/drivers/scsi/bfa/bfa_defs_svc.h index 8ab7964..3dc713d 100644 --- a/drivers/scsi/bfa/bfa_defs_svc.h +++ b/drivers/scsi/bfa/bfa_defs_svc.h @@ -1458,7 +1458,6 @@ struct bfa_aen_entry_s { enum bfa_aen_category aen_category; u32 aen_type; union bfa_aen_data_u aen_data; - struct timeval aen_tv; u32 seq_num; u32 bfad_num; }; diff --git a/drivers/scsi/bfa/bfad_im.h b/drivers/scsi/bfa/bfad_im.h index f6c1023..6955042 100644 --- a/drivers/scsi/bfa/bfad_im.h +++ b/drivers/scsi/bfa/bfad_im.h @@ -131,7 +131,6 @@ struct bfad_im_s { /* post fc_host vendor event */ #define bfad_im_post_vendor_event(_entry, _drv, _cnt, _cat, _evt) do { \ - do_gettimeofday(&(_entry)->aen_tv); \ (_entry)->bfad_num = (_drv)->inst_no; \ (_entry)->seq_num = (_cnt); \ (_entry)->aen_category = (_cat); \ -- 1.9.1

9 years, 5 months

[PATCH 3/3] scsi: bfa: bfa_cs: Remove struct timeval

by Amitoj Kaur Chawla

32 bit systems using 'struct timeval' will break in the year 2038, so we replace the code appropriately. This patch replaces struct timeval and do_gettimeofday() with monotonic ktime_get_ns(). Since we are interested in microseconds portion of the time, we can use NSEC_PER_USEC macro but this would lead to expensive division for a frequently used function. Alternatively a bit shift has been done which performs a division of 1024 instead of 1000 which slightly alters the value returned by this function. Signed-off-by: Amitoj Kaur Chawla <amitoj1606(a)gmail.com> --- drivers/scsi/bfa/bfa_cs.h | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/scsi/bfa/bfa_cs.h b/drivers/scsi/bfa/bfa_cs.h index 91a8aa3..daee860 100644 --- a/drivers/scsi/bfa/bfa_cs.h +++ b/drivers/scsi/bfa/bfa_cs.h @@ -32,13 +32,7 @@ #define BFA_TRC_MAX (4 * 1024) #endif -#define BFA_TRC_TS(_trcm) \ - ({ \ - struct timeval tv; \ - \ - do_gettimeofday(&tv); \ - (tv.tv_sec*1000000+tv.tv_usec); \ - }) +#define BFA_TRC_TS(_trcm) (ktime_get_ns() >> 10) #ifndef BFA_TRC_TS #define BFA_TRC_TS(_trcm) ((_trcm)->ticks++) -- 1.9.1

9 years, 5 months

[PATCH v2 2/2] scsi: bfa: Remove use of time_t

by Amitoj Kaur Chawla

32 bit systems using 'time_t' will break in the year 2038, so we modify the code appropriately. This patch removes the cast to 'time_t' in the assignment statement since we are eventually removing the time_t definition from the kernel as an effort to solve the y2038 problem. This change will avoid the build error but the code is still broken and requires a change in the ioctl interface. Further, since the variable io_profile_start_time will break in 2038 or 2106 depending on user space interpreting it as signed or unsigned, comments have been added to highlight the same. Signed-off-by: Amitoj Kaur Chawla <amitoj1606(a)gmail.com> --- Changes in v2: -Added comments about overflow Only apply this patch if it's seen as acceptable that the io_profile_start_time remains truncated to 32 bits in IOCMD_ITNIM_GET_IOPROFILE. If this is something that needs to be fixed by adding a replacement vendor command, leave the cast in place as a reminder. drivers/scsi/bfa/bfa_defs_svc.h | 4 ++++ drivers/scsi/bfa/bfa_fcpim.c | 3 ++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/bfa/bfa_defs_svc.h b/drivers/scsi/bfa/bfa_defs_svc.h index e7acf41..599db7b 100644 --- a/drivers/scsi/bfa/bfa_defs_svc.h +++ b/drivers/scsi/bfa/bfa_defs_svc.h @@ -1211,6 +1211,10 @@ struct bfa_itnim_ioprofile_s { u32 clock_res_mul; u32 clock_res_div; u32 index; + /* + * Overflow in 2038 or 2106 depending on user space interpreting it as + * signed or unsigned. + */ u32 io_profile_start_time; /* IO profile start time */ u32 iocomps[BFA_IOBUCKET_MAX]; /* IO completed */ struct bfa_itnim_latency_s io_latency; diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c index 6730340..56df8d0 100644 --- a/drivers/scsi/bfa/bfa_fcpim.c +++ b/drivers/scsi/bfa/bfa_fcpim.c @@ -1478,7 +1478,8 @@ bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim, return BFA_STATUS_IOPROFILE_OFF; itnim->ioprofile.index = BFA_IOBUCKET_MAX; - itnim->ioprofile.io_profile_start_time = (u32)(time_t) + /* io_profile_start_time will overflow in 2038 or 2106 */ + itnim->ioprofile.io_profile_start_time = (u32) bfa_io_profile_start_time(itnim->bfa); itnim->ioprofile.clock_res_mul = bfa_io_lat_clock_res_mul; itnim->ioprofile.clock_res_div = bfa_io_lat_clock_res_div; -- 1.9.1

9 years, 5 months

[PATCH v2 1/2] scsi: bfa: Use 'ktime_get_real_seconds()'

by Amitoj Kaur Chawla

This patch replaces u32 time storing variable with u64 variable to store the 64 bit seconds value returned by ktime_get_real_seconds(). A cast to time_t has also been added to the assignment statement which will cause a build error when we eventually remove the time_t definition from the kernel. We can't change the layout of the structure retrieving profile data as it is being used in a vendor specific command that can get sent from user space. Signed-off-by: Amitoj Kaur Chawla <amitoj1606(a)gmail.com> --- Changes in v2: -Modified commit message drivers/scsi/bfa/bfa_fcpim.c | 6 +++--- drivers/scsi/bfa/bfa_fcpim.h | 4 ++-- drivers/scsi/bfa/bfad_bsg.c | 6 +++--- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c index d7385d1..6730340 100644 --- a/drivers/scsi/bfa/bfa_fcpim.c +++ b/drivers/scsi/bfa/bfa_fcpim.c @@ -468,7 +468,7 @@ bfa_ioim_profile_start(struct bfa_ioim_s *ioim) } bfa_status_t -bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time) +bfa_fcpim_profile_on(struct bfa_s *bfa, u64 time) { struct bfa_itnim_s *itnim; struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa); @@ -1478,8 +1478,8 @@ bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim, return BFA_STATUS_IOPROFILE_OFF; itnim->ioprofile.index = BFA_IOBUCKET_MAX; - itnim->ioprofile.io_profile_start_time = - bfa_io_profile_start_time(itnim->bfa); + itnim->ioprofile.io_profile_start_time = (u32)(time_t) + bfa_io_profile_start_time(itnim->bfa); itnim->ioprofile.clock_res_mul = bfa_io_lat_clock_res_mul; itnim->ioprofile.clock_res_div = bfa_io_lat_clock_res_div; *ioprofile = itnim->ioprofile; diff --git a/drivers/scsi/bfa/bfa_fcpim.h b/drivers/scsi/bfa/bfa_fcpim.h index e693af6..274e3af 100644 --- a/drivers/scsi/bfa/bfa_fcpim.h +++ b/drivers/scsi/bfa/bfa_fcpim.h @@ -135,7 +135,7 @@ struct bfa_fcpim_s { struct bfa_fcpim_del_itn_stats_s del_itn_stats; bfa_boolean_t ioredirect; bfa_boolean_t io_profile; - u32 io_profile_start_time; + u64 io_profile_start_time; bfa_fcpim_profile_t profile_comp; bfa_fcpim_profile_t profile_start; }; @@ -309,7 +309,7 @@ bfa_status_t bfa_fcpim_port_iostats(struct bfa_s *bfa, struct bfa_itnim_iostats_s *stats, u8 lp_tag); void bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *fcpim_stats, struct bfa_itnim_iostats_s *itnim_stats); -bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time); +bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u64 time); bfa_status_t bfa_fcpim_profile_off(struct bfa_s *bfa); #define bfa_fcpim_ioredirect_enabled(__bfa) \ diff --git a/drivers/scsi/bfa/bfad_bsg.c b/drivers/scsi/bfa/bfad_bsg.c index 023b9d4..92f5b0f 100644 --- a/drivers/scsi/bfa/bfad_bsg.c +++ b/drivers/scsi/bfa/bfad_bsg.c @@ -15,6 +15,7 @@ * General Public License for more details. */ +#include <linux/ktime.h> #include <linux/uaccess.h> #include "bfad_drv.h" #include "bfad_im.h" @@ -2093,13 +2094,12 @@ bfad_iocmd_fcpim_cfg_profile(struct bfad_s *bfad, void *cmd, unsigned int v_cmd) { struct bfa_bsg_fcpim_profile_s *iocmd = (struct bfa_bsg_fcpim_profile_s *)cmd; - struct timeval tv; unsigned long flags; - do_gettimeofday(&tv); spin_lock_irqsave(&bfad->bfad_lock, flags); if (v_cmd == IOCMD_FCPIM_PROFILE_ON) - iocmd->status = bfa_fcpim_profile_on(&bfad->bfa, tv.tv_sec); + iocmd->status = bfa_fcpim_profile_on(&bfad->bfa, + ktime_get_real_seconds()); else if (v_cmd == IOCMD_FCPIM_PROFILE_OFF) iocmd->status = bfa_fcpim_profile_off(&bfad->bfa); spin_unlock_irqrestore(&bfad->bfad_lock, flags); -- 1.9.1

9 years, 5 months

[PATCH 2/2] scsi: bfa: Remove use of 'time_t'

by Amitoj Kaur Chawla

9 years, 5 months

[PATCH 1/2] scsi: bfa: Use ktime_get_real_seconds()

by Amitoj Kaur Chawla

32 bit systems using 'struct timeval' will break in the year 2038, so we modify the code appropriately. This patch replaces the use of struct timeval and do_gettimeofday() with ktime_get_real_seconds() which returns a 64 bit value which is safer than struct timeval. This patch replaces u32 time storing variable with u64 variable to store the 64 bit seconds value returned by ktime_get_real_seconds(). Since we can't change the layout of the structure retrieving profile data as it is being used in a vendor specific command that can get sent from user space, a cast to time_t has been added to the assignment statement. Signed-off-by: Amitoj Kaur Chawla <amitoj1606(a)gmail.com> --- drivers/scsi/bfa/bfa_fcpim.c | 6 +++--- drivers/scsi/bfa/bfa_fcpim.h | 4 ++-- drivers/scsi/bfa/bfad_bsg.c | 6 +++--- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c index d7385d1..6730340 100644 --- a/drivers/scsi/bfa/bfa_fcpim.c +++ b/drivers/scsi/bfa/bfa_fcpim.c @@ -468,7 +468,7 @@ bfa_ioim_profile_start(struct bfa_ioim_s *ioim) } bfa_status_t -bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time) +bfa_fcpim_profile_on(struct bfa_s *bfa, u64 time) { struct bfa_itnim_s *itnim; struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa); @@ -1478,8 +1478,8 @@ bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim, return BFA_STATUS_IOPROFILE_OFF; itnim->ioprofile.index = BFA_IOBUCKET_MAX; - itnim->ioprofile.io_profile_start_time = - bfa_io_profile_start_time(itnim->bfa); + itnim->ioprofile.io_profile_start_time = (u32)(time_t) + bfa_io_profile_start_time(itnim->bfa); itnim->ioprofile.clock_res_mul = bfa_io_lat_clock_res_mul; itnim->ioprofile.clock_res_div = bfa_io_lat_clock_res_div; *ioprofile = itnim->ioprofile; diff --git a/drivers/scsi/bfa/bfa_fcpim.h b/drivers/scsi/bfa/bfa_fcpim.h index e693af6..274e3af 100644 --- a/drivers/scsi/bfa/bfa_fcpim.h +++ b/drivers/scsi/bfa/bfa_fcpim.h @@ -135,7 +135,7 @@ struct bfa_fcpim_s { struct bfa_fcpim_del_itn_stats_s del_itn_stats; bfa_boolean_t ioredirect; bfa_boolean_t io_profile; - u32 io_profile_start_time; + u64 io_profile_start_time; bfa_fcpim_profile_t profile_comp; bfa_fcpim_profile_t profile_start; }; @@ -309,7 +309,7 @@ bfa_status_t bfa_fcpim_port_iostats(struct bfa_s *bfa, struct bfa_itnim_iostats_s *stats, u8 lp_tag); void bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *fcpim_stats, struct bfa_itnim_iostats_s *itnim_stats); -bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time); +bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u64 time); bfa_status_t bfa_fcpim_profile_off(struct bfa_s *bfa); #define bfa_fcpim_ioredirect_enabled(__bfa) \ diff --git a/drivers/scsi/bfa/bfad_bsg.c b/drivers/scsi/bfa/bfad_bsg.c index 023b9d4..92f5b0f 100644 --- a/drivers/scsi/bfa/bfad_bsg.c +++ b/drivers/scsi/bfa/bfad_bsg.c @@ -15,6 +15,7 @@ * General Public License for more details. */ +#include <linux/ktime.h> #include <linux/uaccess.h> #include "bfad_drv.h" #include "bfad_im.h" @@ -2093,13 +2094,12 @@ bfad_iocmd_fcpim_cfg_profile(struct bfad_s *bfad, void *cmd, unsigned int v_cmd) { struct bfa_bsg_fcpim_profile_s *iocmd = (struct bfa_bsg_fcpim_profile_s *)cmd; - struct timeval tv; unsigned long flags; - do_gettimeofday(&tv); spin_lock_irqsave(&bfad->bfad_lock, flags); if (v_cmd == IOCMD_FCPIM_PROFILE_ON) - iocmd->status = bfa_fcpim_profile_on(&bfad->bfa, tv.tv_sec); + iocmd->status = bfa_fcpim_profile_on(&bfad->bfa, + ktime_get_real_seconds()); else if (v_cmd == IOCMD_FCPIM_PROFILE_OFF) iocmd->status = bfa_fcpim_profile_off(&bfad->bfa); spin_unlock_irqrestore(&bfad->bfad_lock, flags); -- 1.9.1

9 years, 5 months

[PATCH] net: dns_resolver: convert time_t to time64_t

by Aya Mahfouz

Changes the defintion of the pointer _expiry from time_t to time64_t. This is to handle the Y2038 problem where time_t will overflow in 2038. The change is safe because the kernel subsystems that call dns_query pass NULL. Signed-off-by: Arnd Bergmann <arnd(a)arndb.de> Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal(a)gmail.com> --- Changelog: v1: The changes were originally made by Arnd Bergmann in relation to time_t. I've broken down a patch sent to me to two independent patches. include/linux/dns_resolver.h | 2 +- net/dns_resolver/dns_query.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/dns_resolver.h b/include/linux/dns_resolver.h index cc92268..6ac3cad 100644 --- a/include/linux/dns_resolver.h +++ b/include/linux/dns_resolver.h @@ -27,7 +27,7 @@ #ifdef __KERNEL__ extern int dns_query(const char *type, const char *name, size_t namelen, - const char *options, char **_result, time_t *_expiry); + const char *options, char **_result, time64_t *_expiry); #endif /* KERNEL */ diff --git a/net/dns_resolver/dns_query.c b/net/dns_resolver/dns_query.c index 4677b6f..ecc28cf 100644 --- a/net/dns_resolver/dns_query.c +++ b/net/dns_resolver/dns_query.c @@ -67,7 +67,7 @@ * Returns the size of the result on success, -ve error code otherwise. */ int dns_query(const char *type, const char *name, size_t namelen, - const char *options, char **_result, time_t *_expiry) + const char *options, char **_result, time64_t *_expiry) { struct key *rkey; const struct user_key_payload *upayload; -- 2.4.3 -- Kind Regards, Aya Saif El-yazal Mahfouz

9 years, 5 months

You have 1 new fax, document 0000619186

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9 years, 5 months

[PATCH 0/2] fs:hpfs:Remove time_t

by DengChao

The hpfs code uses time_t which will overflow at 2038. If time_t is only internal used without being stored on disk, simply replacing it with time64_t is fine. Otherwise, since the range of time has been already lost when it is stored on disk, the only thing we can do is a cast between 32-bit value and time64_t so as to remove time_t. DengChao (2): fs:hpfs:Remove internal using time_t fs:hpfs:Remove time_t used on disk fs/hpfs/hpfs_fn.h | 26 ++++++++++++++++++++++---- fs/hpfs/namei.c | 21 +++++++++++++++------ 2 files changed, 37 insertions(+), 10 deletions(-) -- 1.9.1

9 years, 5 months

You have received fax, document 0000827154

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9 years, 5 months

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Y2038