Merge tag 'y2038-vfs' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground
Merge commit. Changes below are compared with the first parent: b41dae06.
Changes
47 files changed · +294 −72
Only the first 600 diff lines are shown. Download the complete patch.
fs/9p/vfs_super.c
View filediff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 08112fb..ca243e6 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -69,8 +69,12 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
if (v9fs_proto_dotl(v9ses)) {
sb->s_op = &v9fs_super_ops_dotl;
sb->s_xattr = v9fs_xattr_handlers;
- } else
+ } else {
sb->s_op = &v9fs_super_ops;
+ sb->s_time_max = U32_MAX;
+ }
+
+ sb->s_time_min = 0;
ret = super_setup_bdi(sb);
if (ret)
fs/affs/amigaffs.c
View filediff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c
index 14a6c1b..f708c45 100644
--- a/fs/affs/amigaffs.c
+++ b/fs/affs/amigaffs.c
@@ -375,7 +375,7 @@ affs_secs_to_datestamp(time64_t secs, struct affs_date *ds)
u32 minute;
s32 rem;
- secs -= sys_tz.tz_minuteswest * 60 + ((8 * 365 + 2) * 24 * 60 * 60);
+ secs -= sys_tz.tz_minuteswest * 60 + AFFS_EPOCH_DELTA;
if (secs < 0)
secs = 0;
days = div_s64_rem(secs, 86400, &rem);
fs/affs/amigaffs.h
View filediff --git a/fs/affs/amigaffs.h b/fs/affs/amigaffs.h
index f9bef90..81fb396 100644
--- a/fs/affs/amigaffs.h
+++ b/fs/affs/amigaffs.h
@@ -32,6 +32,9 @@
#define AFFS_ROOT_BMAPS 25
+/* Seconds since Amiga epoch of 1978/01/01 to UNIX */
+#define AFFS_EPOCH_DELTA ((8 * 365 + 2) * 86400LL)
+
struct affs_date {
__be32 days;
__be32 mins;
fs/affs/inode.c
View filediff --git a/fs/affs/inode.c b/fs/affs/inode.c
index 73598bf..a346cf7 100644
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -150,10 +150,10 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
}
inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
- = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
+ = (be32_to_cpu(tail->change.days) * 86400LL +
be32_to_cpu(tail->change.mins) * 60 +
be32_to_cpu(tail->change.ticks) / 50 +
- ((8 * 365 + 2) * 24 * 60 * 60)) +
+ AFFS_EPOCH_DELTA) +
sys_tz.tz_minuteswest * 60;
inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
affs_brelse(bh);
fs/affs/super.c
View filediff --git a/fs/affs/super.c b/fs/affs/super.c
index e7d036e..cc463ae 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -355,6 +355,10 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_op = &affs_sops;
sb->s_flags |= SB_NODIRATIME;
+ sb->s_time_gran = NSEC_PER_SEC;
+ sb->s_time_min = sys_tz.tz_minuteswest * 60 + AFFS_EPOCH_DELTA;
+ sb->s_time_max = 86400LL * U32_MAX + 86400 + sb->s_time_min;
+
sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
fs/attr.c
View filediff --git a/fs/attr.c b/fs/attr.c
index d22e818..df28035 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -183,15 +183,18 @@ void setattr_copy(struct inode *inode, const struct iattr *attr)
inode->i_uid = attr->ia_uid;
if (ia_valid & ATTR_GID)
inode->i_gid = attr->ia_gid;
- if (ia_valid & ATTR_ATIME)
- inode->i_atime = timespec64_trunc(attr->ia_atime,
- inode->i_sb->s_time_gran);
- if (ia_valid & ATTR_MTIME)
- inode->i_mtime = timespec64_trunc(attr->ia_mtime,
- inode->i_sb->s_time_gran);
- if (ia_valid & ATTR_CTIME)
- inode->i_ctime = timespec64_trunc(attr->ia_ctime,
- inode->i_sb->s_time_gran);
+ if (ia_valid & ATTR_ATIME) {
+ inode->i_atime = timestamp_truncate(attr->ia_atime,
+ inode);
+ }
+ if (ia_valid & ATTR_MTIME) {
+ inode->i_mtime = timestamp_truncate(attr->ia_mtime,
+ inode);
+ }
+ if (ia_valid & ATTR_CTIME) {
+ inode->i_ctime = timestamp_truncate(attr->ia_ctime,
+ inode);
+ }
if (ia_valid & ATTR_MODE) {
umode_t mode = attr->ia_mode;
fs/befs/linuxvfs.c
View filediff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 462d096..64cdf4d 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -893,6 +893,8 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
sb_set_blocksize(sb, (ulong) befs_sb->block_size);
sb->s_op = &befs_sops;
sb->s_export_op = &befs_export_operations;
+ sb->s_time_min = 0;
+ sb->s_time_max = 0xffffffffffffll;
root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir)));
if (IS_ERR(root)) {
ret = PTR_ERR(root);
fs/bfs/inode.c
View filediff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 5e97bed..f8ce136 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -324,6 +324,8 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
return -ENOMEM;
mutex_init(&info->bfs_lock);
s->s_fs_info = info;
+ s->s_time_min = 0;
+ s->s_time_max = U32_MAX;
sb_set_blocksize(s, BFS_BSIZE);
fs/ceph/super.c
View filediff --git a/fs/ceph/super.c b/fs/ceph/super.c
index ab4868c..377fafc 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -979,6 +979,8 @@ static int ceph_set_super(struct super_block *s, void *data)
s->s_export_op = &ceph_export_ops;
s->s_time_gran = 1;
+ s->s_time_min = 0;
+ s->s_time_max = U32_MAX;
ret = set_anon_super(s, NULL); /* what is that second arg for? */
if (ret != 0)
fs/cifs/cifsfs.c
View filediff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 4e2f748..e8afff7 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -56,6 +56,15 @@
#include "dfs_cache.h"
#endif
+/*
+ * DOS dates from 1980/1/1 through 2107/12/31
+ * Protocol specifications indicate the range should be to 119, which
+ * limits maximum year to 2099. But this range has not been checked.
+ */
+#define SMB_DATE_MAX (127<<9 | 12<<5 | 31)
+#define SMB_DATE_MIN (0<<9 | 1<<5 | 1)
+#define SMB_TIME_MAX (23<<11 | 59<<5 | 29)
+
int cifsFYI = 0;
bool traceSMB;
bool enable_oplocks = true;
@@ -142,6 +151,7 @@ cifs_read_super(struct super_block *sb)
struct inode *inode;
struct cifs_sb_info *cifs_sb;
struct cifs_tcon *tcon;
+ struct timespec64 ts;
int rc = 0;
cifs_sb = CIFS_SB(sb);
@@ -161,6 +171,18 @@ cifs_read_super(struct super_block *sb)
/* BB FIXME fix time_gran to be larger for LANMAN sessions */
sb->s_time_gran = 100;
+ if (tcon->unix_ext) {
+ ts = cifs_NTtimeToUnix(0);
+ sb->s_time_min = ts.tv_sec;
+ ts = cifs_NTtimeToUnix(cpu_to_le64(S64_MAX));
+ sb->s_time_max = ts.tv_sec;
+ } else {
+ ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MIN), 0, 0);
+ sb->s_time_min = ts.tv_sec;
+ ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MAX), cpu_to_le16(SMB_TIME_MAX), 0);
+ sb->s_time_max = ts.tv_sec;
+ }
+
sb->s_magic = CIFS_MAGIC_NUMBER;
sb->s_op = &cifs_super_ops;
sb->s_xattr = cifs_xattr_handlers;
fs/cifs/netmisc.c
View filediff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index ed92958..49c17ee 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -949,8 +949,8 @@ static const int total_days_of_prev_months[] = {
struct timespec64 cnvrtDosUnixTm(__le16 le_date, __le16 le_time, int offset)
{
struct timespec64 ts;
- time64_t sec;
- int min, days, month, year;
+ time64_t sec, days;
+ int min, day, month, year;
u16 date = le16_to_cpu(le_date);
u16 time = le16_to_cpu(le_time);
SMB_TIME *st = (SMB_TIME *)&time;
@@ -966,15 +966,15 @@ struct timespec64 cnvrtDosUnixTm(__le16 le_date, __le16 le_time, int offset)
sec += 60 * 60 * st->Hours;
if (st->Hours > 24)
cifs_dbg(VFS, "illegal hours %d\n", st->Hours);
- days = sd->Day;
+ day = sd->Day;
month = sd->Month;
- if (days < 1 || days > 31 || month < 1 || month > 12) {
- cifs_dbg(VFS, "illegal date, month %d day: %d\n", month, days);
- days = clamp(days, 1, 31);
+ if (day < 1 || day > 31 || month < 1 || month > 12) {
+ cifs_dbg(VFS, "illegal date, month %d day: %d\n", month, day);
+ day = clamp(day, 1, 31);
month = clamp(month, 1, 12);
}
month -= 1;
- days += total_days_of_prev_months[month];
+ days = day + total_days_of_prev_months[month];
days += 3652; /* account for difference in days between 1980 and 1970 */
year = sd->Year;
days += year * 365;
fs/coda/inode.c
View filediff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 321f56e..b1c70e2 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -188,6 +188,9 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
sb->s_magic = CODA_SUPER_MAGIC;
sb->s_op = &coda_super_operations;
sb->s_d_op = &coda_dentry_operations;
+ sb->s_time_gran = 1;
+ sb->s_time_min = S64_MIN;
+ sb->s_time_max = S64_MAX;
error = super_setup_bdi(sb);
if (error)
fs/configfs/inode.c
View filediff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index ab02843..884dcf0 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -76,14 +76,14 @@ int configfs_setattr(struct dentry * dentry, struct iattr * iattr)
if (ia_valid & ATTR_GID)
sd_iattr->ia_gid = iattr->ia_gid;
if (ia_valid & ATTR_ATIME)
- sd_iattr->ia_atime = timespec64_trunc(iattr->ia_atime,
- inode->i_sb->s_time_gran);
+ sd_iattr->ia_atime = timestamp_truncate(iattr->ia_atime,
+ inode);
if (ia_valid & ATTR_MTIME)
- sd_iattr->ia_mtime = timespec64_trunc(iattr->ia_mtime,
- inode->i_sb->s_time_gran);
+ sd_iattr->ia_mtime = timestamp_truncate(iattr->ia_mtime,
+ inode);
if (ia_valid & ATTR_CTIME)
- sd_iattr->ia_ctime = timespec64_trunc(iattr->ia_ctime,
- inode->i_sb->s_time_gran);
+ sd_iattr->ia_ctime = timestamp_truncate(iattr->ia_ctime,
+ inode);
if (ia_valid & ATTR_MODE) {
umode_t mode = iattr->ia_mode;
fs/cramfs/inode.c
View filediff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 9352487..4d1d8b7 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -597,6 +597,8 @@ static int cramfs_finalize_super(struct super_block *sb,
/* Set it all up.. */
sb->s_flags |= SB_RDONLY;
+ sb->s_time_min = 0;
+ sb->s_time_max = 0;
sb->s_op = &cramfs_ops;
root = get_cramfs_inode(sb, cramfs_root, 0);
if (IS_ERR(root))
fs/efs/super.c
View filediff --git a/fs/efs/super.c b/fs/efs/super.c
index 867fc24..4a6ebff 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -257,6 +257,8 @@ static int efs_fill_super(struct super_block *s, void *d, int silent)
if (!sb)
return -ENOMEM;
s->s_fs_info = sb;
+ s->s_time_min = 0;
+ s->s_time_max = U32_MAX;
s->s_magic = EFS_SUPER_MAGIC;
if (!sb_set_blocksize(s, EFS_BLOCKSIZE)) {
fs/ext2/super.c
View filediff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 44eb6e7..baa36c6 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1002,6 +1002,8 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
sb->s_maxbytes = ext2_max_size(sb->s_blocksize_bits);
sb->s_max_links = EXT2_LINK_MAX;
+ sb->s_time_min = S32_MIN;
+ sb->s_time_max = S32_MAX;
if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV) {
sbi->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE;
fs/ext4/ext4.h
View filediff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 9c7f403..42c6e4a 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -832,11 +832,13 @@ static inline void ext4_decode_extra_time(struct timespec64 *time,
#define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \
do { \
- (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \
if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) {\
+ (raw_inode)->xtime = cpu_to_le32((inode)->xtime.tv_sec); \
(raw_inode)->xtime ## _extra = \
ext4_encode_extra_time(&(inode)->xtime); \
} \
+ else \
+ (raw_inode)->xtime = cpu_to_le32(clamp_t(int32_t, (inode)->xtime.tv_sec, S32_MIN, S32_MAX)); \
} while (0)
#define EXT4_EINODE_SET_XTIME(xtime, einode, raw_inode) \
@@ -1643,6 +1645,10 @@ static inline bool ext4_verity_in_progress(struct inode *inode)
#define EXT4_GOOD_OLD_INODE_SIZE 128
+#define EXT4_EXTRA_TIMESTAMP_MAX (((s64)1 << 34) - 1 + S32_MIN)
+#define EXT4_NON_EXTRA_TIMESTAMP_MAX S32_MAX
+#define EXT4_TIMESTAMP_MIN S32_MIN
+
/*
* Feature set definitions
*/
fs/ext4/super.c
View filediff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 27cd622..3db5f17 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4039,8 +4039,21 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
sbi->s_inode_size);
goto failed_mount;
}
- if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE)
- sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2);
+ /*
+ * i_atime_extra is the last extra field available for [acm]times in
+ * struct ext4_inode. Checking for that field should suffice to ensure
+ * we have extra space for all three.
+ */
+ if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) +
+ sizeof(((struct ext4_inode *)0)->i_atime_extra)) {
+ sb->s_time_gran = 1;
+ sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX;
+ } else {
+ sb->s_time_gran = NSEC_PER_SEC;
+ sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX;
+ }
+
+ sb->s_time_min = EXT4_TIMESTAMP_MIN;
}
sbi->s_desc_size = le16_to_cpu(es->s_desc_size);
fs/f2fs/file.c
View filediff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 39fffc1..56efde9 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -745,15 +745,18 @@ static void __setattr_copy(struct inode *inode, const struct iattr *attr)
inode->i_uid = attr->ia_uid;
if (ia_valid & ATTR_GID)
inode->i_gid = attr->ia_gid;
- if (ia_valid & ATTR_ATIME)
- inode->i_atime = timespec64_trunc(attr->ia_atime,
- inode->i_sb->s_time_gran);
- if (ia_valid & ATTR_MTIME)
- inode->i_mtime = timespec64_trunc(attr->ia_mtime,
- inode->i_sb->s_time_gran);
- if (ia_valid & ATTR_CTIME)
- inode->i_ctime = timespec64_trunc(attr->ia_ctime,
- inode->i_sb->s_time_gran);
+ if (ia_valid & ATTR_ATIME) {
+ inode->i_atime = timestamp_truncate(attr->ia_atime,
+ inode);
+ }
+ if (ia_valid & ATTR_MTIME) {
+ inode->i_mtime = timestamp_truncate(attr->ia_mtime,
+ inode);
+ }
+ if (ia_valid & ATTR_CTIME) {
+ inode->i_ctime = timestamp_truncate(attr->ia_ctime,
+ inode);
+ }
if (ia_valid & ATTR_MODE) {
umode_t mode = attr->ia_mode;
fs/fat/inode.c
View filediff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 0568919..5f04c5c 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -31,6 +31,11 @@
#define KB_IN_SECTORS 2
+/* DOS dates from 1980/1/1 through 2107/12/31 */
+#define FAT_DATE_MIN (0<<9 | 1<<5 | 1)
+#define FAT_DATE_MAX (127<<9 | 12<<5 | 31)
+#define FAT_TIME_MAX (23<<11 | 59<<5 | 29)
+
/*
* A deserialized copy of the on-disk structure laid out in struct
* fat_boot_sector.
@@ -1605,6 +1610,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
int debug;
long error;
char buf[50];
+ struct timespec64 ts;
/*
* GFP_KERNEL is ok here, because while we do hold the
@@ -1698,6 +1704,12 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
sbi->free_clus_valid = 0;
sbi->prev_free = FAT_START_ENT;
sb->s_maxbytes = 0xffffffff;
+ fat_time_fat2unix(sbi, &ts, 0, cpu_to_le16(FAT_DATE_MIN), 0);
+ sb->s_time_min = ts.tv_sec;
+
+ fat_time_fat2unix(sbi, &ts, cpu_to_le16(FAT_TIME_MAX),
+ cpu_to_le16(FAT_DATE_MAX), 0);
+ sb->s_time_max = ts.tv_sec;
if (!sbi->fat_length && bpb.fat32_length) {
struct fat_boot_fsinfo *fsinfo;
fs/freevxfs/vxfs_super.c
View filediff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index a89f68c..578a506 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -229,6 +229,8 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
sbp->s_op = &vxfs_super_ops;
sbp->s_fs_info = infp;
+ sbp->s_time_min = 0;
+ sbp->s_time_max = U32_MAX;
if (!vxfs_try_sb_magic(sbp, silent, 1,
(__force __fs32)cpu_to_le32(VXFS_SUPER_MAGIC))) {
fs/hpfs/hpfs_fn.h
View filediff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index ab2e7cc..1cca832 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -334,7 +334,7 @@ long hpfs_ioctl(struct file *file, unsigned cmd, unsigned long arg);
* local time (HPFS) to GMT (Unix)
*/
-static inline time64_t local_to_gmt(struct super_block *s, time32_t t)
+static inline time64_t local_to_gmt(struct super_block *s, time64_t t)
{
extern struct timezone sys_tz;
return t + sys_tz.tz_minuteswest * 60 + hpfs_sb(s)->sb_timeshift;
@@ -343,9 +343,7 @@ static inline time64_t local_to_gmt(struct super_block *s, time32_t t)
static inline time32_t gmt_to_local(struct super_block *s, time64_t t)
{
extern struct timezone sys_tz;
- t = t - sys_tz.tz_minuteswest * 60 - hpfs_sb(s)->sb_timeshift;
-
- return clamp_t(time64_t, t, 0, U32_MAX);
+ return t - sys_tz.tz_minuteswest * 60 - hpfs_sb(s)->sb_timeshift;
}
static inline time32_t local_get_seconds(struct super_block *s)
fs/hpfs/super.c
View filediff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 9db6d84..0a677a9 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -614,6 +614,8 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
s->s_magic = HPFS_SUPER_MAGIC;
s->s_op = &hpfs_sops;
s->s_d_op = &hpfs_dentry_operations;
+ s->s_time_min = local_to_gmt(s, 0);
+ s->s_time_max = local_to_gmt(s, U32_MAX);
sbi->sb_root = le32_to_cpu(superblock->root);
sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors);
fs/inode.c
View filediff --git a/fs/inode.c b/fs/inode.c
index 0f1e3b5..64bf28c 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -2167,6 +2167,37 @@ struct timespec64 timespec64_trunc(struct timespec64 t, unsigned gran)
EXPORT_SYMBOL(timespec64_trunc);
/**
+ * timestamp_truncate - Truncate timespec to a granularity
+ * @t: Timespec
+ * @inode: inode being updated
+ *
+ * Truncate a timespec to the granularity supported by the fs
+ * containing the inode. Always rounds down. gran must
+ * not be 0 nor greater than a second (NSEC_PER_SEC, or 10^9 ns).
+ */
+struct timespec64 timestamp_truncate(struct timespec64 t, struct inode *inode)
+{
+ struct super_block *sb = inode->i_sb;
+ unsigned int gran = sb->s_time_gran;
+
+ t.tv_sec = clamp(t.tv_sec, sb->s_time_min, sb->s_time_max);
+ if (unlikely(t.tv_sec == sb->s_time_max || t.tv_sec == sb->s_time_min))
+ t.tv_nsec = 0;
+
+ /* Avoid division in the common cases 1 ns and 1 s. */
+ if (gran == 1)
+ ; /* nothing */
+ else if (gran == NSEC_PER_SEC)
+ t.tv_nsec = 0;
+ else if (gran > 1 && gran < NSEC_PER_SEC)
+ t.tv_nsec -= t.tv_nsec % gran;
+ else
+ WARN(1, "invalid file time granularity: %u", gran);
+ return t;
+}
+EXPORT_SYMBOL(timestamp_truncate);
+
+/**
* current_time - Return FS time
* @inode: inode.
*
@@ -2187,7 +2218,7 @@ struct timespec64 current_time(struct inode *inode)
return now;
}
- return timespec64_trunc(now, inode->i_sb->s_time_gran);
+ return timestamp_truncate(now, inode);
}
EXPORT_SYMBOL(current_time);
fs/isofs/inode.c
View filediff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 9e30d87..62c0462 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -30,6 +30,9 @@
#include "isofs.h"
#include "zisofs.h"
+/* max tz offset is 13 hours */
+#define MAX_TZ_OFFSET (52*15*60)
+
#define BEQUIET
static int isofs_hashi(const struct dentry *parent, struct qstr *qstr);
@@ -801,6 +804,10 @@ root_found:
*/
s->s_maxbytes = 0x80000000000LL;
+ /* ECMA-119 timestamp from 1900/1/1 with tz offset */
+ s->s_time_min = mktime64(1900, 1, 1, 0, 0, 0) - MAX_TZ_OFFSET;
+ s->s_time_max = mktime64(U8_MAX+1900, 12, 31, 23, 59, 59) + MAX_TZ_OFFSET;
+
/* Set this for reference. Its not currently used except on write
which we don't have .. */
fs/jffs2/fs.c
View filediff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 8a20ddd..d0b59d0 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -590,6 +590,9 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent)
sb->s_blocksize = PAGE_SIZE;
sb->s_blocksize_bits = PAGE_SHIFT;
sb->s_magic = JFFS2_SUPER_MAGIC;
+ sb->s_time_min = 0;
+ sb->s_time_max = U32_MAX;
+
if (!sb_rdonly(sb))
jffs2_start_garbage_collect_thread(c);
return 0;
fs/jfs/super.c
View filediff --git a/fs/jfs/super.c b/fs/jfs/super.c
index f4e10cb..b2dc4d1 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -503,6 +503,8 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_fs_info = sbi;
sb->s_max_links = JFS_LINK_MAX;
+ sb->s_time_min = 0;
+ sb->s_time_max = U32_MAX;
sbi->sb = sb;
sbi->uid = INVALID_UID;
sbi->gid = INVALID_GID;
fs/kernfs/inode.c
View filediff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index f3f3984..f3eaa88 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -158,12 +158,11 @@ static inline void set_default_inode_attr(struct inode *inode, umode_t mode)
static inline void set_inode_attr(struct inode *inode,
struct kernfs_iattrs *attrs)
{
- struct super_block *sb = inode->i_sb;
inode->i_uid = attrs->ia_uid;
inode->i_gid = attrs->ia_gid;
This diff is incomplete. Download the complete patch.
fs/minix/inode.c
View fileThis diff is incomplete. Download the complete patch.
fs/namespace.c
View fileThis diff is incomplete. Download the complete patch.
fs/nfs/super.c
View fileThis diff is incomplete. Download the complete patch.
fs/ntfs/inode.c
View fileThis diff is incomplete. Download the complete patch.
fs/omfs/inode.c
View fileThis diff is incomplete. Download the complete patch.
fs/pstore/ram.c
View fileThis diff is incomplete. Download the complete patch.
fs/qnx4/inode.c
View fileThis diff is incomplete. Download the complete patch.
fs/qnx6/inode.c
View fileThis diff is incomplete. Download the complete patch.
fs/reiserfs/super.c
View fileThis diff is incomplete. Download the complete patch.
fs/romfs/super.c
View fileThis diff is incomplete. Download the complete patch.
fs/squashfs/super.c
View fileThis diff is incomplete. Download the complete patch.
fs/super.c
View fileThis diff is incomplete. Download the complete patch.
fs/sysv/super.c
View fileThis diff is incomplete. Download the complete patch.
fs/ubifs/file.c
View fileThis diff is incomplete. Download the complete patch.
fs/ufs/super.c
View fileThis diff is incomplete. Download the complete patch.
fs/utimes.c
View fileThis diff is incomplete. Download the complete patch.
fs/xfs/xfs_super.c
View fileThis diff is incomplete. Download the complete patch.
include/linux/fs.h
View fileThis diff is incomplete. Download the complete patch.
include/linux/time64.h
View fileThis diff is incomplete. Download the complete patch.