From: Arnd Bergmann <arnd@xxxxxxxx> Subject: fat: propagate 64-bit inode timestamps Now that we pass down 64-bit timestamps from VFS, we just need to convert that correctly into on-disk timestamps. To make that work correctly, this changes the last use of time_to_tm() in the kernel to time64_to_tm(), which also lets use remove that deprecated interfaces. Similarly, the time_t use in fat_time_fat2unix() truncates the timestamp on the way in, which can be avoided by using types that are wide enough to hold the intermediate values during the conversion. [hirofumi@xxxxxxxxxxxxxxxxxx: remove useless temporary variable, needless long long] Link: http://lkml.kernel.org/r/20180619153646.3637529-1-arnd@xxxxxxxx Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Acked-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx> Cc: Jeff Layton <jlayton@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- diff -puN fs/fat/dir.c~fat-propagate-64-bit-inode-timestamps fs/fat/dir.c --- a/fs/fat/dir.c~fat-propagate-64-bit-inode-timestamps +++ a/fs/fat/dir.c @@ -1130,7 +1130,7 @@ error: return err; } -int fat_alloc_new_dir(struct inode *dir, struct timespec *ts) +int fat_alloc_new_dir(struct inode *dir, struct timespec64 *ts) { struct super_block *sb = dir->i_sb; struct msdos_sb_info *sbi = MSDOS_SB(sb); diff -puN fs/fat/fat.h~fat-propagate-64-bit-inode-timestamps fs/fat/fat.h --- a/fs/fat/fat.h~fat-propagate-64-bit-inode-timestamps +++ a/fs/fat/fat.h @@ -304,7 +304,7 @@ extern int fat_scan_logstart(struct inod struct fat_slot_info *sinfo); extern int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh, struct msdos_dir_entry **de); -extern int fat_alloc_new_dir(struct inode *dir, struct timespec *ts); +extern int fat_alloc_new_dir(struct inode *dir, struct timespec64 *ts); extern int fat_add_entries(struct inode *dir, void *slots, int nr_slots, struct fat_slot_info *sinfo); extern int fat_remove_entries(struct inode *dir, struct fat_slot_info *sinfo); @@ -412,9 +412,9 @@ void fat_msg(struct super_block *sb, con } while (0) extern int fat_clusters_flush(struct super_block *sb); extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster); -extern void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec *ts, +extern void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec64 *ts, __le16 __time, __le16 __date, u8 time_cs); -extern void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec *ts, +extern void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec64 *ts, __le16 *time, __le16 *date, u8 *time_cs); extern int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs); diff -puN fs/fat/inode.c~fat-propagate-64-bit-inode-timestamps fs/fat/inode.c --- a/fs/fat/inode.c~fat-propagate-64-bit-inode-timestamps +++ a/fs/fat/inode.c @@ -508,7 +508,6 @@ static int fat_validate_dir(struct inode /* doesn't deal with root inode */ int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de) { - struct timespec ts; struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb); int error; @@ -559,14 +558,11 @@ int fat_fill_inode(struct inode *inode, inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1)) & ~((loff_t)sbi->cluster_size - 1)) >> 9; - fat_time_fat2unix(sbi, &ts, de->time, de->date, 0); - inode->i_mtime = timespec_to_timespec64(ts); + fat_time_fat2unix(sbi, &inode->i_mtime, de->time, de->date, 0); if (sbi->options.isvfat) { - fat_time_fat2unix(sbi, &ts, de->ctime, + fat_time_fat2unix(sbi, &inode->i_ctime, de->ctime, de->cdate, de->ctime_cs); - inode->i_ctime = timespec_to_timespec64(ts); - fat_time_fat2unix(sbi, &ts, 0, de->adate, 0); - inode->i_atime = timespec_to_timespec64(ts); + fat_time_fat2unix(sbi, &inode->i_atime, 0, de->adate, 0); } else inode->i_ctime = inode->i_atime = inode->i_mtime; @@ -843,7 +839,6 @@ static int fat_statfs(struct dentry *den static int __fat_write_inode(struct inode *inode, int wait) { - struct timespec ts; struct super_block *sb = inode->i_sb; struct msdos_sb_info *sbi = MSDOS_SB(sb); struct buffer_head *bh; @@ -881,16 +876,13 @@ retry: raw_entry->size = cpu_to_le32(inode->i_size); raw_entry->attr = fat_make_attrs(inode); fat_set_start(raw_entry, MSDOS_I(inode)->i_logstart); - ts = timespec64_to_timespec(inode->i_mtime); - fat_time_unix2fat(sbi, &ts, &raw_entry->time, + fat_time_unix2fat(sbi, &inode->i_mtime, &raw_entry->time, &raw_entry->date, NULL); if (sbi->options.isvfat) { __le16 atime; - ts = timespec64_to_timespec(inode->i_ctime); - fat_time_unix2fat(sbi, &ts, &raw_entry->ctime, + fat_time_unix2fat(sbi, &inode->i_ctime, &raw_entry->ctime, &raw_entry->cdate, &raw_entry->ctime_cs); - ts = timespec64_to_timespec(inode->i_atime); - fat_time_unix2fat(sbi, &ts, &atime, + fat_time_unix2fat(sbi, &inode->i_atime, &atime, &raw_entry->adate, NULL); } spin_unlock(&sbi->inode_hash_lock); diff -puN fs/fat/misc.c~fat-propagate-64-bit-inode-timestamps fs/fat/misc.c --- a/fs/fat/misc.c~fat-propagate-64-bit-inode-timestamps +++ a/fs/fat/misc.c @@ -180,17 +180,18 @@ int fat_chain_add(struct inode *inode, i #define IS_LEAP_YEAR(y) (!((y) & 3) && (y) != YEAR_2100) /* Linear day numbers of the respective 1sts in non-leap years. */ -static time_t days_in_year[] = { +static long days_in_year[] = { /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */ 0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, }; /* Convert a FAT time/date pair to a UNIX date (seconds since 1 1 70). */ -void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec *ts, +void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec64 *ts, __le16 __time, __le16 __date, u8 time_cs) { u16 time = le16_to_cpu(__time), date = le16_to_cpu(__date); - time_t second, day, leap_day, month, year; + time64_t second; + long day, leap_day, month, year; year = date >> 9; month = max(1, (date >> 5) & 0xf); @@ -205,7 +206,7 @@ void fat_time_fat2unix(struct msdos_sb_i second = (time & 0x1f) << 1; second += ((time >> 5) & 0x3f) * SECS_PER_MIN; second += (time >> 11) * SECS_PER_HOUR; - second += (year * 365 + leap_day + second += (time64_t)(year * 365 + leap_day + days_in_year[month] + day + DAYS_DELTA) * SECS_PER_DAY; @@ -224,11 +225,11 @@ void fat_time_fat2unix(struct msdos_sb_i } /* Convert linear UNIX date to a FAT time/date pair. */ -void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec *ts, +void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec64 *ts, __le16 *time, __le16 *date, u8 *time_cs) { struct tm tm; - time_to_tm(ts->tv_sec, + time64_to_tm(ts->tv_sec, (sbi->options.tz_set ? sbi->options.time_offset : -sys_tz.tz_minuteswest) * SECS_PER_MIN, &tm); diff -puN fs/fat/namei_msdos.c~fat-propagate-64-bit-inode-timestamps fs/fat/namei_msdos.c --- a/fs/fat/namei_msdos.c~fat-propagate-64-bit-inode-timestamps +++ a/fs/fat/namei_msdos.c @@ -225,7 +225,7 @@ static struct dentry *msdos_lookup(struc /***** Creates a directory entry (name is already formatted). */ static int msdos_add_entry(struct inode *dir, const unsigned char *name, int is_dir, int is_hid, int cluster, - struct timespec *ts, struct fat_slot_info *sinfo) + struct timespec64 *ts, struct fat_slot_info *sinfo) { struct msdos_sb_info *sbi = MSDOS_SB(dir->i_sb); struct msdos_dir_entry de; @@ -250,7 +250,7 @@ static int msdos_add_entry(struct inode if (err) return err; - dir->i_ctime = dir->i_mtime = timespec_to_timespec64(*ts); + dir->i_ctime = dir->i_mtime = *ts; if (IS_DIRSYNC(dir)) (void)fat_sync_inode(dir); else @@ -267,7 +267,6 @@ static int msdos_create(struct inode *di struct inode *inode = NULL; struct fat_slot_info sinfo; struct timespec64 ts; - struct timespec t; unsigned char msdos_name[MSDOS_NAME]; int err, is_hid; @@ -286,8 +285,7 @@ static int msdos_create(struct inode *di } ts = current_time(dir); - t = timespec64_to_timespec(ts); - err = msdos_add_entry(dir, msdos_name, 0, is_hid, 0, &t, &sinfo); + err = msdos_add_entry(dir, msdos_name, 0, is_hid, 0, &ts, &sinfo); if (err) goto out; inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos); @@ -347,7 +345,6 @@ static int msdos_mkdir(struct inode *dir struct inode *inode; unsigned char msdos_name[MSDOS_NAME]; struct timespec64 ts; - struct timespec t; int err, is_hid, cluster; mutex_lock(&MSDOS_SB(sb)->s_lock); @@ -365,13 +362,12 @@ static int msdos_mkdir(struct inode *dir } ts = current_time(dir); - t = timespec64_to_timespec(ts); - cluster = fat_alloc_new_dir(dir, &t); + cluster = fat_alloc_new_dir(dir, &ts); if (cluster < 0) { err = cluster; goto out; } - err = msdos_add_entry(dir, msdos_name, 1, is_hid, cluster, &t, &sinfo); + err = msdos_add_entry(dir, msdos_name, 1, is_hid, cluster, &ts, &sinfo); if (err) goto out_free; inc_nlink(dir); @@ -503,9 +499,8 @@ static int do_msdos_rename(struct inode new_i_pos = MSDOS_I(new_inode)->i_pos; fat_detach(new_inode); } else { - struct timespec t = timespec64_to_timespec(ts); err = msdos_add_entry(new_dir, new_name, is_dir, is_hid, 0, - &t, &sinfo); + &ts, &sinfo); if (err) goto out; new_i_pos = sinfo.i_pos; diff -puN fs/fat/namei_vfat.c~fat-propagate-64-bit-inode-timestamps fs/fat/namei_vfat.c --- a/fs/fat/namei_vfat.c~fat-propagate-64-bit-inode-timestamps +++ a/fs/fat/namei_vfat.c @@ -577,7 +577,7 @@ xlate_to_uni(const unsigned char *name, static int vfat_build_slots(struct inode *dir, const unsigned char *name, int len, int is_dir, int cluster, - struct timespec *ts, + struct timespec64 *ts, struct msdos_dir_slot *slots, int *nr_slots) { struct msdos_sb_info *sbi = MSDOS_SB(dir->i_sb); @@ -653,7 +653,7 @@ out_free: } static int vfat_add_entry(struct inode *dir, const struct qstr *qname, - int is_dir, int cluster, struct timespec *ts, + int is_dir, int cluster, struct timespec64 *ts, struct fat_slot_info *sinfo) { struct msdos_dir_slot *slots; @@ -678,7 +678,7 @@ static int vfat_add_entry(struct inode * goto cleanup; /* update timestamp */ - dir->i_ctime = dir->i_mtime = dir->i_atime = timespec_to_timespec64(*ts); + dir->i_ctime = dir->i_mtime = dir->i_atime = *ts; if (IS_DIRSYNC(dir)) (void)fat_sync_inode(dir); else @@ -762,14 +762,12 @@ static int vfat_create(struct inode *dir struct inode *inode; struct fat_slot_info sinfo; struct timespec64 ts; - struct timespec t; int err; mutex_lock(&MSDOS_SB(sb)->s_lock); ts = current_time(dir); - t = timespec64_to_timespec(ts); - err = vfat_add_entry(dir, &dentry->d_name, 0, 0, &t, &sinfo); + err = vfat_add_entry(dir, &dentry->d_name, 0, 0, &ts, &sinfo); if (err) goto out; inode_inc_iversion(dir); @@ -853,19 +851,17 @@ static int vfat_mkdir(struct inode *dir, struct inode *inode; struct fat_slot_info sinfo; struct timespec64 ts; - struct timespec t; int err, cluster; mutex_lock(&MSDOS_SB(sb)->s_lock); ts = current_time(dir); - t = timespec64_to_timespec(ts); - cluster = fat_alloc_new_dir(dir, &t); + cluster = fat_alloc_new_dir(dir, &ts); if (cluster < 0) { err = cluster; goto out; } - err = vfat_add_entry(dir, &dentry->d_name, 1, cluster, &t, &sinfo); + err = vfat_add_entry(dir, &dentry->d_name, 1, cluster, &ts, &sinfo); if (err) goto out_free; inode_inc_iversion(dir); @@ -904,7 +900,6 @@ static int vfat_rename(struct inode *old struct inode *old_inode, *new_inode; struct fat_slot_info old_sinfo, sinfo; struct timespec64 ts; - struct timespec t; loff_t new_i_pos; int err, is_dir, update_dotdot, corrupt = 0; struct super_block *sb = old_dir->i_sb; @@ -939,9 +934,8 @@ static int vfat_rename(struct inode *old new_i_pos = MSDOS_I(new_inode)->i_pos; fat_detach(new_inode); } else { - t = timespec64_to_timespec(ts); err = vfat_add_entry(new_dir, &new_dentry->d_name, is_dir, 0, - &t, &sinfo); + &ts, &sinfo); if (err) goto out; new_i_pos = sinfo.i_pos; _
