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Date: Fri, 29 Nov 2019 21:30:24 -0800 From: Deepa Dinamani <deepa.kernel@...il.com> To: viro@...iv.linux.org.uk, linux-kernel@...r.kernel.org Cc: linux-fsdevel@...r.kernel.org, arnd@...db.de, hirofumi@...l.parknet.co.jp Subject: [PATCH 1/7] fs: fat: Eliminate timespec64_trunc() usage timespec64_trunc() is being deleted. timestamp_truncate() is the replacement api for timespec64_trunc. timestamp_truncate() additionally clamps timestamps to make sure the timestamps lie within the permitted range for the filesystem. But, fat always truncates the times locally after it obtains the timestamps from current_time(). Implement a local version here along the lines of existing truncate functions. Suggested-by: Al Viro <viro@...iv.linux.org.uk> Signed-off-by: Deepa Dinamani <deepa.kernel@...il.com> Cc: hirofumi@...l.parknet.co.jp --- fs/fat/misc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/fs/fat/misc.c b/fs/fat/misc.c index 1e08bd54c5fb..f1b2a1fc2a6a 100644 --- a/fs/fat/misc.c +++ b/fs/fat/misc.c @@ -271,6 +271,14 @@ static inline struct timespec64 fat_timespec64_trunc_2secs(struct timespec64 ts) { return (struct timespec64){ ts.tv_sec & ~1ULL, 0 }; } + +static inline struct timespec64 fat_timespec64_trunc_10ms(struct timespec64 ts) +{ + if (ts.tv_nsec) + ts.tv_nsec -= ts.tv_nsec % 10000000UL; + return ts; +} + /* * truncate the various times with appropriate granularity: * root inode: @@ -308,7 +316,7 @@ int fat_truncate_time(struct inode *inode, struct timespec64 *now, int flags) } if (flags & S_CTIME) { if (sbi->options.isvfat) - inode->i_ctime = timespec64_trunc(*now, 10000000); + inode->i_ctime = fat_timespec64_trunc_10ms(*now); else inode->i_ctime = fat_timespec64_trunc_2secs(*now); } -- 2.17.1
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