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fs/ntfs: use timespec64 directly for timestamp conversion 

Now that the VFS has been converted from timespec to timespec64
timestamps, only the conversion to/from ntfs timestamps uses 32-bit
seconds.

This changes that last missing piece to get the ntfs implementation
y2038 safe on 32-bit architectures.

Link: http://lkml.kernel.org/r/20180718115017.742609-2-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Anton Altaparmakov <anton@tuxera.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arnd Bergmann 2018-08-17 15:43:50 -07:00 committed by Linus Torvalds
parent a3fda0ffea
commit bcf451ecfc
2 changed files with 21 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
fs/ntfs/inode.c
View File

@ -667,18 +667,18 @@ static int ntfs_read_locked_inode(struct inode *vi)
* mtime is the last change of the data within the file. Not changed
* when only metadata is changed, e.g. a rename doesn't affect mtime.
*/
vi->i_mtime = timespec_to_timespec64(ntfs2utc(si->last_data_change_time));
vi->i_mtime = ntfs2utc(si->last_data_change_time);
/*
* ctime is the last change of the metadata of the file. This obviously
* always changes, when mtime is changed. ctime can be changed on its
* own, mtime is then not changed, e.g. when a file is renamed.
*/
vi->i_ctime = timespec_to_timespec64(ntfs2utc(si->last_mft_change_time));
vi->i_ctime = ntfs2utc(si->last_mft_change_time);
/*
* Last access to the data within the file. Not changed during a rename
* for example but changed whenever the file is written to.
*/
vi->i_atime = timespec_to_timespec64(ntfs2utc(si->last_access_time));
vi->i_atime = ntfs2utc(si->last_access_time);
/* Find the attribute list attribute if present. */
ntfs_attr_reinit_search_ctx(ctx);
@ -2997,7 +2997,7 @@ int __ntfs_write_inode(struct inode *vi, int sync)
si = (STANDARD_INFORMATION*)((u8*)ctx->attr +
le16_to_cpu(ctx->attr->data.resident.value_offset));
/* Update the access times if they have changed. */
nt = utc2ntfs(timespec64_to_timespec(vi->i_mtime));
nt = utc2ntfs(vi->i_mtime);
if (si->last_data_change_time != nt) {
ntfs_debug("Updating mtime for inode 0x%lx: old = 0x%llx, "
"new = 0x%llx", vi->i_ino, (long long)
@ -3006,7 +3006,7 @@ int __ntfs_write_inode(struct inode *vi, int sync)
si->last_data_change_time = nt;
modified = true;
}
nt = utc2ntfs(timespec64_to_timespec(vi->i_ctime));
nt = utc2ntfs(vi->i_ctime);
if (si->last_mft_change_time != nt) {
ntfs_debug("Updating ctime for inode 0x%lx: old = 0x%llx, "
"new = 0x%llx", vi->i_ino, (long long)
@ -3015,7 +3015,7 @@ int __ntfs_write_inode(struct inode *vi, int sync)
si->last_mft_change_time = nt;
modified = true;
}
nt = utc2ntfs(timespec64_to_timespec(vi->i_atime));
nt = utc2ntfs(vi->i_atime);
if (si->last_access_time != nt) {
ntfs_debug("Updating atime for inode 0x%lx: old = 0x%llx, "
"new = 0x%llx", vi->i_ino,

27
fs/ntfs/time.h
View File

@ -36,16 +36,16 @@
* Convert the Linux UTC time @ts to its corresponding NTFS time and return
* that in little endian format.
*
* Linux stores time in a struct timespec consisting of a time_t (long at
* present) tv_sec and a long tv_nsec where tv_sec is the number of 1-second
* intervals since 1st January 1970, 00:00:00 UTC and tv_nsec is the number of
* 1-nano-second intervals since the value of tv_sec.
* Linux stores time in a struct timespec64 consisting of a time64_t tv_sec
* and a long tv_nsec where tv_sec is the number of 1-second intervals since
* 1st January 1970, 00:00:00 UTC and tv_nsec is the number of 1-nano-second
* intervals since the value of tv_sec.
*
* NTFS uses Microsoft's standard time format which is stored in a s64 and is
* measured as the number of 100-nano-second intervals since 1st January 1601,
* 00:00:00 UTC.
*/
static inline sle64 utc2ntfs(const struct timespec ts)
static inline sle64 utc2ntfs(const struct timespec64 ts)
{
/*
* Convert the seconds to 100ns intervals, add the nano-seconds
@ -63,7 +63,10 @@ static inline sle64 utc2ntfs(const struct timespec ts)
*/
static inline sle64 get_current_ntfs_time(void)
{
return utc2ntfs(current_kernel_time());
struct timespec64 ts;
ktime_get_coarse_real_ts64(&ts);
return utc2ntfs(ts);
}
/**
@ -73,18 +76,18 @@ static inline sle64 get_current_ntfs_time(void)
* Convert the little endian NTFS time @time to its corresponding Linux UTC
* time and return that in cpu format.
*
* Linux stores time in a struct timespec consisting of a time_t (long at
* present) tv_sec and a long tv_nsec where tv_sec is the number of 1-second
* intervals since 1st January 1970, 00:00:00 UTC and tv_nsec is the number of
* 1-nano-second intervals since the value of tv_sec.
* Linux stores time in a struct timespec64 consisting of a time64_t tv_sec
* and a long tv_nsec where tv_sec is the number of 1-second intervals since
* 1st January 1970, 00:00:00 UTC and tv_nsec is the number of 1-nano-second
* intervals since the value of tv_sec.
*
* NTFS uses Microsoft's standard time format which is stored in a s64 and is
* measured as the number of 100 nano-second intervals since 1st January 1601,
* 00:00:00 UTC.
*/
static inline struct timespec ntfs2utc(const sle64 time)
static inline struct timespec64 ntfs2utc(const sle64 time)
{
struct timespec ts;
struct timespec64 ts;
/* Subtract the NTFS time offset. */
u64 t = (u64)(sle64_to_cpu(time) - NTFS_TIME_OFFSET);