2018-01-23 6:10 GMT+09:00 Arnd Bergmann arnd@arndb.de:
The superblock and segment timestamps are used only internally in nilfs2 and can be read out using sysfs. Since we are using the old 'get_seconds()' interface and store the data as timestamps, the behavior differs slightly between 64-bit and 32-bit kernels, the latter will show incorrect timestamps after 2038 in sysfs, and presumably fail completely in 2106 as comparisons go wrong.
This changes nilfs2 to use time64_t with ktime_get_real_seconds() to handle timestamps, making the behavior consistent and correct on both 32-bit and 64-bit machines.
The on-disk format already uses 64-bit timestamps, so nothing changes there.
Signed-off-by: Arnd Bergmann arnd@arndb.de
Thank you for this patch.
Acked-by: Ryusuke Konishi konishi.ryusuke@lab.ntt.co.jp
fs/nilfs2/segbuf.c | 2 +- fs/nilfs2/segbuf.h | 4 ++-- fs/nilfs2/segment.c | 2 +- fs/nilfs2/segment.h | 2 +- fs/nilfs2/sufile.c | 2 +- fs/nilfs2/sufile.h | 2 +- fs/nilfs2/super.c | 4 ++-- fs/nilfs2/sysfs.c | 21 ++++++++++----------- fs/nilfs2/the_nilfs.h | 8 ++++---- 9 files changed, 23 insertions(+), 24 deletions(-)
diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c index 6c5009cc4e6f..68cb9e4740b4 100644 --- a/fs/nilfs2/segbuf.c +++ b/fs/nilfs2/segbuf.c @@ -130,7 +130,7 @@ int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *segbuf, }
int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned int flags,
time_t ctime, __u64 cno)
time64_t ctime, __u64 cno){ int err;
diff --git a/fs/nilfs2/segbuf.h b/fs/nilfs2/segbuf.h index 7bbccc099709..10e16935fff6 100644 --- a/fs/nilfs2/segbuf.h +++ b/fs/nilfs2/segbuf.h @@ -46,7 +46,7 @@ struct nilfs_segsum_info { unsigned long nfileblk; u64 seg_seq; __u64 cno;
time_t ctime;
time64_t ctime; sector_t next;};
@@ -120,7 +120,7 @@ void nilfs_segbuf_map_cont(struct nilfs_segment_buffer *segbuf, struct nilfs_segment_buffer *prev); void nilfs_segbuf_set_next_segnum(struct nilfs_segment_buffer *, __u64, struct the_nilfs *); -int nilfs_segbuf_reset(struct nilfs_segment_buffer *, unsigned int, time_t, +int nilfs_segbuf_reset(struct nilfs_segment_buffer *, unsigned int, time64_t, __u64); int nilfs_segbuf_extend_segsum(struct nilfs_segment_buffer *); int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *, diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 9f3ffba41533..0953635e7d48 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -2040,7 +2040,7 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) goto out;
/* Update time stamp */
sci->sc_seg_ctime = get_seconds();
sci->sc_seg_ctime = ktime_get_real_seconds(); err = nilfs_segctor_collect(sci, nilfs, mode); if (unlikely(err))diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h index 84084a4d9b3e..04634e3e3d58 100644 --- a/fs/nilfs2/segment.h +++ b/fs/nilfs2/segment.h @@ -157,7 +157,7 @@ struct nilfs_sc_info { unsigned long sc_blk_cnt; unsigned long sc_datablk_cnt; unsigned long sc_nblk_this_inc;
time_t sc_seg_ctime;
time64_t sc_seg_ctime; __u64 sc_cno; unsigned long sc_flags;diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c index 1341a41e7b43..c7fa139d50e8 100644 --- a/fs/nilfs2/sufile.c +++ b/fs/nilfs2/sufile.c @@ -526,7 +526,7 @@ int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum)
- @modtime: modification time (option)
*/ int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
unsigned long nblocks, time_t modtime)
unsigned long nblocks, time64_t modtime){ struct buffer_head *bh; struct nilfs_segment_usage *su; diff --git a/fs/nilfs2/sufile.h b/fs/nilfs2/sufile.h index 158a9190c8ec..673a891350f4 100644 --- a/fs/nilfs2/sufile.h +++ b/fs/nilfs2/sufile.h @@ -35,7 +35,7 @@ int nilfs_sufile_set_alloc_range(struct inode *sufile, __u64 start, __u64 end); int nilfs_sufile_alloc(struct inode *, __u64 *); int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum); int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
unsigned long nblocks, time_t modtime);
unsigned long nblocks, time64_t modtime);int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *); ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned int, size_t); diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 3073b646e1ba..6ffeca84d7c3 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -283,10 +283,10 @@ int nilfs_commit_super(struct super_block *sb, int flag) { struct the_nilfs *nilfs = sb->s_fs_info; struct nilfs_super_block **sbp = nilfs->ns_sbp;
time_t t;
time64_t t; /* nilfs->ns_sem must be locked by the caller. */
t = get_seconds();
t = ktime_get_real_seconds(); nilfs->ns_sbwtime = t; sbp[0]->s_wtime = cpu_to_le64(t); sbp[0]->s_sum = 0;diff --git a/fs/nilfs2/sysfs.c b/fs/nilfs2/sysfs.c index 490303e3d517..4b25837e7724 100644 --- a/fs/nilfs2/sysfs.c +++ b/fs/nilfs2/sysfs.c @@ -31,7 +31,7 @@ static struct kset *nilfs_kset; #define NILFS_SHOW_TIME(time_t_val, buf) ({ \ struct tm res; \ int count = 0; \
time_to_tm(time_t_val, 0, &res); \
time64_to_tm(time_t_val, 0, &res); \ res.tm_year += 1900; \ res.tm_mon += 1; \ count = scnprintf(buf, PAGE_SIZE, \@@ -579,7 +579,7 @@ nilfs_segctor_last_seg_write_time_show(struct nilfs_segctor_attr *attr, struct the_nilfs *nilfs, char *buf) {
time_t ctime;
time64_t ctime; down_read(&nilfs->ns_segctor_sem); ctime = nilfs->ns_ctime;@@ -593,13 +593,13 @@ nilfs_segctor_last_seg_write_time_secs_show(struct nilfs_segctor_attr *attr, struct the_nilfs *nilfs, char *buf) {
time_t ctime;
time64_t ctime; down_read(&nilfs->ns_segctor_sem); ctime = nilfs->ns_ctime; up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", (unsigned long long)ctime);
return snprintf(buf, PAGE_SIZE, "%llu\n", ctime);}
static ssize_t @@ -607,7 +607,7 @@ nilfs_segctor_last_nongc_write_time_show(struct nilfs_segctor_attr *attr, struct the_nilfs *nilfs, char *buf) {
time_t nongc_ctime;
time64_t nongc_ctime; down_read(&nilfs->ns_segctor_sem); nongc_ctime = nilfs->ns_nongc_ctime;@@ -621,14 +621,13 @@ nilfs_segctor_last_nongc_write_time_secs_show(struct nilfs_segctor_attr *attr, struct the_nilfs *nilfs, char *buf) {
time_t nongc_ctime;
time64_t nongc_ctime; down_read(&nilfs->ns_segctor_sem); nongc_ctime = nilfs->ns_nongc_ctime; up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n",(unsigned long long)nongc_ctime);
return snprintf(buf, PAGE_SIZE, "%llu\n", nongc_ctime);}
static ssize_t @@ -728,7 +727,7 @@ nilfs_superblock_sb_write_time_show(struct nilfs_superblock_attr *attr, struct the_nilfs *nilfs, char *buf) {
time_t sbwtime;
time64_t sbwtime; down_read(&nilfs->ns_sem); sbwtime = nilfs->ns_sbwtime;@@ -742,13 +741,13 @@ nilfs_superblock_sb_write_time_secs_show(struct nilfs_superblock_attr *attr, struct the_nilfs *nilfs, char *buf) {
time_t sbwtime;
time64_t sbwtime; down_read(&nilfs->ns_sem); sbwtime = nilfs->ns_sbwtime; up_read(&nilfs->ns_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", (unsigned long long)sbwtime);
return snprintf(buf, PAGE_SIZE, "%llu\n", sbwtime);}
static ssize_t diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h index 883d732b0259..36da1779f976 100644 --- a/fs/nilfs2/the_nilfs.h +++ b/fs/nilfs2/the_nilfs.h @@ -116,7 +116,7 @@ struct the_nilfs { */ struct buffer_head *ns_sbh[2]; struct nilfs_super_block *ns_sbp[2];
time_t ns_sbwtime;
time64_t ns_sbwtime; unsigned int ns_sbwcount; unsigned int ns_sbsize; unsigned int ns_mount_state;@@ -131,8 +131,8 @@ struct the_nilfs { __u64 ns_nextnum; unsigned long ns_pseg_offset; __u64 ns_cno;
time_t ns_ctime;time_t ns_nongc_ctime;
time64_t ns_ctime;time64_t ns_nongc_ctime; atomic_t ns_ndirtyblks; /*@@ -267,7 +267,7 @@ struct nilfs_root {
static inline int nilfs_sb_need_update(struct the_nilfs *nilfs) {
u64 t = get_seconds();
u64 t = ktime_get_real_seconds(); return t < nilfs->ns_sbwtime || t > nilfs->ns_sbwtime + nilfs->ns_sb_update_freq;-- 2.9.0
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