[PATCH 00/20] vfs: Add support for timestamp limits

[PATCH 00/20] vfs: Add support for timestamp limits

[Deepa Dinamani]

The series is an update and a more complete version of the
previously posted series at
https://lore.kernel.org/linux-fsdevel/20180122020426.2988-1-deepa.kernel@gmail.com/

Thanks to Arnd Bergmann for doing a few preliminary reviews.
They helped me fix a few issues I had overlooked.

The limits (sometimes granularity also) for the filesystems updated here are according to the
following table:

File system   Time type                      Start year Expiration year Granularity
cramfs        fixed                          0          0
romfs         fixed                          0          0
pstore        ascii seconds (27 digit ascii) S64_MIN    S64_MAX         NSEC_PER_USEC
coda          INT64                          S64_MIN    S64_MAX         1
omfs          64-bit milliseconds            0          U64_MAX/ 1000   NSEC_PER_MSEC
befs          unsigned 48-bit seconds        0          0xffffffffffff  alloc_super
bfs           unsigned 32-bit seconds        0          U32_MAX         alloc_super
efs           unsigned 32-bit seconds        0          U32_MAX         alloc_super
ext2          signed 32-bit seconds          S32_MIN    S32_MAX         alloc_super
ext3          signed 32-bit seconds          S32_MIN    S32_MAX         alloc_super
ext4 (old)    signed 32-bit seconds          S32_MIN    S32_MAX         alloc_super
ext4 (extra)  34-bit seconds, 30-bit ns      S32_MIN    0x37fffffff	1
freevxfs      u32 secs/usecs                 0          U32_MAX         alloc_super
jffs2         unsigned 32-bit seconds        0          U32_MAX         alloc_super
jfs           unsigned 32-bit seconds/ns     0          U32_MAX         1
minix         unsigned 32-bit seconds        0          U32_MAX         alloc_super
orangefs      u64 seconds                    0          U64_MAX         alloc_super
qnx4          unsigned 32-bit seconds        0          U32_MAX         alloc_super
qnx6          unsigned 32-bit seconds        0          U32_MAX         alloc_super
reiserfs      unsigned 32-bit seconds        0          U32_MAX         alloc_super
squashfs      unsigned 32-bit seconds        0          U32_MAX         alloc_super
ufs1          signed 32-bit seconds          S32_MIN    S32_MAX         NSEC_PER_SEC
ufs2          signed 64-bit seconds/u32 ns   S64_MIN    S64_MAX         1
xfs           signed 32-bit seconds/ns       S32_MIN    S32_MAX         1
ceph          unsigned 32-bit second/ns      0          U32_MAX         1000
sysv          unsigned 32-bit seconds        0          U32_MAX         alloc_super
affs          u32 day, min, ticks            1978       u32_max days    NSEC_PER_SEC
nfsv2         unsigned 32-bit seconds/ns     0          U32_MAX         1
nfsv3         unsigned 32-bit seconds/ns     0          U32_MAX         1000
nfsv4         u64 seconds/u32 ns             S64_MIN    S64_MAX         1000
isofs         u8 year since 1900 (fixable)   1900       2155            alloc_super
hpfs          unsigned 32-bit seconds        1970       2106            alloc_super
fat           7-bit years, 2s resolution     1980       2107
cifs (smb)    7-bit years                    1980       2107
cifs (modern) 64-bit 100ns since 1601        1601       30828
adfs          40-bit cs since 1900           1900       2248
9p (9P2000)   unsigned 32-bit seconds        1970       2106
9p (9P2000.L) signed 64-bit seconds, ns      1970       S64_MAX

Granularity column filled in by the alloc_super() in the above table indicates that
the granularity is NSEC_PER_SEC.
Note that anything not mentioned above still has the default limits
S64_MIN..S64_MAX.

The patches in the series are as structured below:
1. Add vfs support to maintain the limits per filesystem.
2. Add a new timestamp_truncate() api for clamping timestamps
   according to the filesystem limits.
3. Add a warning for mount syscall to indicate the impending
   expiry of timestamps.
4. Modify utimes to clamp the timestamps.
5. Fill in limits for filesystems.

An updated version of the test for checking file system timestamp limits has been posted
at https://www.spinics.net/lists/fstests/msg12262.html

Changes from previous version:
* No change in mount behavior because of expiry of timestamps.
* Included limits for more filesystems.

Deepa Dinamani (20):
  vfs: Add file timestamp range support
  vfs: Add timestamp_truncate() api
  timestamp_truncate: Replace users of timespec64_trunc
  mount: Add mount warning for impending timestamp expiry
  utimes: Clamp the timestamps before update
  fs: Fill in max and min timestamps in superblock
  9p: Fill min and max timestamps in sb
  adfs: Fill in max and min timestamps in sb
  ext4: Initialize timestamps limits
  fs: nfs: Initialize filesystem timestamp ranges
  fs: cifs: Initialize filesystem timestamp ranges
  fs: fat: Initialize filesystem timestamp ranges
  fs: affs: Initialize filesystem timestamp ranges
  fs: sysv: Initialize filesystem timestamp ranges
  fs: ceph: Initialize filesystem timestamp ranges
  fs: orangefs: Initialize filesystem timestamp ranges
  fs: hpfs: Initialize filesystem timestamp ranges
  fs: omfs: Initialize filesystem timestamp ranges
  pstore: fs superblock limits
  isofs: Initialize filesystem timestamp ranges

 fs/9p/vfs_super.c        |  6 +++++-
 fs/adfs/adfs.h           | 13 +++++++++++++
 fs/adfs/inode.c          |  8 ++------
 fs/adfs/super.c          |  2 ++
 fs/affs/amigaffs.c       |  2 +-
 fs/affs/amigaffs.h       |  3 +++
 fs/affs/inode.c          |  4 ++--
 fs/affs/super.c          |  4 ++++
 fs/attr.c                | 21 ++++++++++++---------
 fs/befs/linuxvfs.c       |  2 ++
 fs/bfs/inode.c           |  2 ++
 fs/ceph/super.c          |  2 ++
 fs/cifs/cifsfs.c         | 22 ++++++++++++++++++++++
 fs/cifs/netmisc.c        | 14 +++++++-------
 fs/coda/inode.c          |  3 +++
 fs/configfs/inode.c      | 12 ++++++------
 fs/cramfs/inode.c        |  2 ++
 fs/efs/super.c           |  2 ++
 fs/ext2/super.c          |  2 ++
 fs/ext4/ext4.h           |  4 ++++
 fs/ext4/super.c          | 17 +++++++++++++++--
 fs/f2fs/file.c           | 21 ++++++++++++---------
 fs/fat/inode.c           | 12 ++++++++++++
 fs/fat/misc.c            |  5 +++--
 fs/freevxfs/vxfs_super.c |  2 ++
 fs/hpfs/hpfs_fn.h        |  6 ++----
 fs/hpfs/super.c          |  2 ++
 fs/inode.c               | 33 ++++++++++++++++++++++++++++++++-
 fs/isofs/inode.c         |  7 +++++++
 fs/jffs2/fs.c            |  3 +++
 fs/jfs/super.c           |  2 ++
 fs/kernfs/inode.c        |  6 +++---
 fs/minix/inode.c         |  2 ++
 fs/namespace.c           | 11 +++++++++++
 fs/nfs/super.c           | 20 +++++++++++++++++++-
 fs/ntfs/inode.c          | 21 ++++++++++++---------
 fs/omfs/inode.c          |  4 ++++
 fs/orangefs/super.c      |  2 ++
 fs/pstore/inode.c        |  4 +++-
 fs/qnx4/inode.c          |  2 ++
 fs/qnx6/inode.c          |  2 ++
 fs/reiserfs/super.c      |  3 +++
 fs/romfs/super.c         |  2 ++
 fs/squashfs/super.c      |  2 ++
 fs/super.c               |  2 ++
 fs/sysv/super.c          |  5 ++++-
 fs/ubifs/file.c          | 21 ++++++++++++---------
 fs/ufs/super.c           |  7 +++++++
 fs/utimes.c              | 17 +++++++++++++----
 fs/xfs/xfs_super.c       |  2 ++
 include/linux/fs.h       |  5 +++++
 include/linux/time64.h   |  2 ++
 52 files changed, 304 insertions(+), 78 deletions(-)

-- 
2.17.1

Cc: adilger.kernel@dilger.ca
Cc: adrian.hunter@intel.com
Cc: aivazian.tigran@gmail.com
Cc: al@alarsen.net
Cc: anna.schumaker@netapp.com
Cc: anton@enomsg.org
Cc: anton@tuxera.com
Cc: asmadeus@codewreck.org
Cc: ccross@android.com
Cc: ceph-devel@vger.kernel.org
Cc: coda@cs.cmu.edu
Cc: codalist@coda.cs.cmu.edu
Cc: darrick.wong@oracle.com
Cc: dedekind1@gmail.com
Cc: devel@lists.orangefs.org
Cc: dsterba@suse.com
Cc: dushistov@mail.ru
Cc: dwmw2@infradead.org
Cc: ericvh@gmail.com
Cc: gregkh@linuxfoundation.org
Cc: hch@infradead.org
Cc: hch@lst.de
Cc: hirofumi@mail.parknet.co.jp
Cc: hubcap@omnibond.com
Cc: idryomov@gmail.com
Cc: jack@suse.com
Cc: jaegeuk@kernel.org
Cc: jaharkes@cs.cmu.edu
Cc: jfs-discussion@lists.sourceforge.net
Cc: jlbec@evilplan.org
Cc: keescook@chromium.org
Cc: linux-cifs@vger.kernel.org
Cc: linux-ext4@vger.kernel.org
Cc: linux-f2fs-devel@lists.sourceforge.net
Cc: linux-karma-devel@lists.sourceforge.net
Cc: linux-mtd@lists.infradead.org
Cc: linux-nfs@vger.kernel.org
Cc: linux-ntfs-dev@lists.sourceforge.net
Cc: linux-xfs@vger.kernel.org
Cc: lucho@ionkov.net
Cc: luisbg@kernel.org
Cc: martin@omnibond.com
Cc: me@bobcopeland.com
Cc: mikulas@artax.karlin.mff.cuni.cz
Cc: nico@fluxnic.net
Cc: phillip@squashfs.org.uk
Cc: reiserfs-devel@vger.kernel.org
Cc: richard@nod.at
Cc: sage@redhat.com
Cc: salah.triki@gmail.com
Cc: sfrench@samba.org
Cc: shaggy@kernel.org
Cc: tj@kernel.org
Cc: tony.luck@intel.com
Cc: trond.myklebust@hammerspace.com
Cc: tytso@mit.edu
Cc: v9fs-developer@lists.sourceforge.net
Cc: yuchao0@huawei.com
Cc: zyan@redhat.com

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

[PATCH 03/20] timestamp_truncate: Replace users of timespec64_trunc

[Deepa Dinamani]

Update the inode timestamp updates to use timestamp_truncate()
instead of timespec64_trunc().

The change was mostly generated by the following coccinelle
script.

virtual context
virtual patch

@r1 depends on patch forall@
struct inode *inode;
identifier i_xtime =~ "^i_[acm]time$";
expression e;
@@

inode->i_xtime =
- timespec64_trunc(
+ timestamp_truncate(
...,
- e);
+ inode);

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: adrian.hunter@intel.com
Cc: anton@tuxera.com
Cc: dedekind1@gmail.com
Cc: gregkh@linuxfoundation.org
Cc: hch@lst.de
Cc: hirofumi@mail.parknet.co.jp
Cc: jaegeuk@kernel.org
Cc: jlbec@evilplan.org
Cc: richard@nod.at
Cc: tj@kernel.org
Cc: yuchao0@huawei.com
Cc: linux-f2fs-devel@lists.sourceforge.net
Cc: linux-ntfs-dev@lists.sourceforge.net
Cc: linux-mtd@lists.infradead.org
---
 fs/attr.c           | 21 ++++++++++++---------
 fs/configfs/inode.c | 12 ++++++------
 fs/f2fs/file.c      | 21 ++++++++++++---------
 fs/fat/misc.c       |  5 +++--
 fs/kernfs/inode.c   |  6 +++---
 fs/ntfs/inode.c     | 21 ++++++++++++---------
 fs/ubifs/file.c     | 21 ++++++++++++---------
 7 files changed, 60 insertions(+), 47 deletions(-)

diff --git a/fs/attr.c b/fs/attr.c
index d22e8187477f..df28035aa23e 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;
 
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index ab0284321912..884dcf06cfbe 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;
 
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 45b45f37d347..faf1e160961b 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -744,15 +744,18 @@ 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;
 
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 1e08bd54c5fb..53bb7c6bf993 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -307,8 +307,9 @@ int fat_truncate_time(struct inode *inode, struct timespec64 *now, int flags)
 		inode->i_atime = (struct timespec64){ seconds, 0 };
 	}
 	if (flags & S_CTIME) {
-		if (sbi->options.isvfat)
-			inode->i_ctime = timespec64_trunc(*now, 10000000);
+		if (sbi->options.isvfat) {
+			inode->i_ctime = timestamp_truncate(*now, inode);
+		}
 		else
 			inode->i_ctime = fat_timespec64_trunc_2secs(*now);
 	}
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index f3f3984cce80..892a58cfe7a1 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -161,9 +161,9 @@ static inline void set_inode_attr(struct inode *inode,
 	struct super_block *sb = inode->i_sb;
 	inode->i_uid = attrs->ia_uid;
 	inode->i_gid = attrs->ia_gid;
-	inode->i_atime = timespec64_trunc(attrs->ia_atime, sb->s_time_gran);
-	inode->i_mtime = timespec64_trunc(attrs->ia_mtime, sb->s_time_gran);
-	inode->i_ctime = timespec64_trunc(attrs->ia_ctime, sb->s_time_gran);
+	inode->i_atime = timestamp_truncate(attrs->ia_atime, inode);
+	inode->i_mtime = timestamp_truncate(attrs->ia_mtime, inode);
+	inode->i_ctime = timestamp_truncate(attrs->ia_ctime, inode);
 }
 
 static void kernfs_refresh_inode(struct kernfs_node *kn, struct inode *inode)
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index 8baa34baf548..6c7388430ad3 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -2899,15 +2899,18 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
 			ia_valid |= ATTR_MTIME | ATTR_CTIME;
 		}
 	}
-	if (ia_valid & ATTR_ATIME)
-		vi->i_atime = timespec64_trunc(attr->ia_atime,
-					       vi->i_sb->s_time_gran);
-	if (ia_valid & ATTR_MTIME)
-		vi->i_mtime = timespec64_trunc(attr->ia_mtime,
-					       vi->i_sb->s_time_gran);
-	if (ia_valid & ATTR_CTIME)
-		vi->i_ctime = timespec64_trunc(attr->ia_ctime,
-					       vi->i_sb->s_time_gran);
+	if (ia_valid & ATTR_ATIME) {
+		vi->i_atime = timestamp_truncate(attr->ia_atime,
+					       vi);
+	}
+	if (ia_valid & ATTR_MTIME) {
+		vi->i_mtime = timestamp_truncate(attr->ia_mtime,
+					       vi);
+	}
+	if (ia_valid & ATTR_CTIME) {
+		vi->i_ctime = timestamp_truncate(attr->ia_ctime,
+					       vi);
+	}
 	mark_inode_dirty(vi);
 out:
 	return err;
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 400970d740bb..cd52585c8f4f 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1078,15 +1078,18 @@ static void do_attr_changes(struct inode *inode, const struct iattr *attr)
 		inode->i_uid = attr->ia_uid;
 	if (attr->ia_valid & ATTR_GID)
 		inode->i_gid = attr->ia_gid;
-	if (attr->ia_valid & ATTR_ATIME)
-		inode->i_atime = timespec64_trunc(attr->ia_atime,
-						  inode->i_sb->s_time_gran);
-	if (attr->ia_valid & ATTR_MTIME)
-		inode->i_mtime = timespec64_trunc(attr->ia_mtime,
-						  inode->i_sb->s_time_gran);
-	if (attr->ia_valid & ATTR_CTIME)
-		inode->i_ctime = timespec64_trunc(attr->ia_ctime,
-						  inode->i_sb->s_time_gran);
+	if (attr->ia_valid & ATTR_ATIME) {
+		inode->i_atime = timestamp_truncate(attr->ia_atime,
+						  inode);
+	}
+	if (attr->ia_valid & ATTR_MTIME) {
+		inode->i_mtime = timestamp_truncate(attr->ia_mtime,
+						  inode);
+	}
+	if (attr->ia_valid & ATTR_CTIME) {
+		inode->i_ctime = timestamp_truncate(attr->ia_ctime,
+						  inode);
+	}
 	if (attr->ia_valid & ATTR_MODE) {
 		umode_t mode = attr->ia_mode;
 
-- 
2.17.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

[PATCH 06/20] fs: Fill in max and min timestamps in superblock

[Deepa Dinamani]

Fill in the appropriate limits to avoid inconsistencies
in the vfs cached inode times when timestamps are
outside the permitted range.

Even though some filesystems are read-only, fill in the
timestamps to reflect the on-disk representation.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: aivazian.tigran@gmail.com
Cc: al@alarsen.net
Cc: coda@cs.cmu.edu
Cc: darrick.wong@oracle.com
Cc: dushistov@mail.ru
Cc: dwmw2@infradead.org
Cc: hch@infradead.org
Cc: jack@suse.com
Cc: jaharkes@cs.cmu.edu
Cc: luisbg@kernel.org
Cc: nico@fluxnic.net
Cc: phillip@squashfs.org.uk
Cc: richard@nod.at
Cc: salah.triki@gmail.com
Cc: shaggy@kernel.org
Cc: linux-xfs@vger.kernel.org
Cc: codalist@coda.cs.cmu.edu
Cc: linux-ext4@vger.kernel.org
Cc: linux-mtd@lists.infradead.org
Cc: jfs-discussion@lists.sourceforge.net
Cc: reiserfs-devel@vger.kernel.org
---
 fs/befs/linuxvfs.c       | 2 ++
 fs/bfs/inode.c           | 2 ++
 fs/coda/inode.c          | 3 +++
 fs/cramfs/inode.c        | 2 ++
 fs/efs/super.c           | 2 ++
 fs/ext2/super.c          | 2 ++
 fs/freevxfs/vxfs_super.c | 2 ++
 fs/jffs2/fs.c            | 3 +++
 fs/jfs/super.c           | 2 ++
 fs/minix/inode.c         | 2 ++
 fs/qnx4/inode.c          | 2 ++
 fs/qnx6/inode.c          | 2 ++
 fs/reiserfs/super.c      | 3 +++
 fs/romfs/super.c         | 2 ++
 fs/squashfs/super.c      | 2 ++
 fs/ufs/super.c           | 7 +++++++
 fs/xfs/xfs_super.c       | 2 ++
 17 files changed, 42 insertions(+)

diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 462d096ff3e9..64cdf4d8e424 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);
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 5e97bed073d7..f8ce1368218b 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);
 
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 321f56e487cb..b1c70e2b9b1e 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)
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 9352487bd0fc..4d1d8b7761ed 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))
diff --git a/fs/efs/super.c b/fs/efs/super.c
index 867fc24dee20..4a6ebff2af76 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)) {
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 44eb6e7eb492..baa36c6fb71e 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;
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index a89f68c3cbed..578a5062706e 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))) {
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 8a20ddd25f2d..d0b59d03a7a9 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;
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index f4e10cb9f734..b2dc4d1f9dcc 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;
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index f96073f25432..7cb5fd38eb14 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -277,6 +277,8 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
 
 	/* set up enough so that it can read an inode */
 	s->s_op = &minix_sops;
+	s->s_time_min = 0;
+	s->s_time_max = U32_MAX;
 	root_inode = minix_iget(s, MINIX_ROOT_INO);
 	if (IS_ERR(root_inode)) {
 		ret = PTR_ERR(root_inode);
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index 922d083bbc7c..e8da1cde87b9 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -201,6 +201,8 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
 	s->s_op = &qnx4_sops;
 	s->s_magic = QNX4_SUPER_MAGIC;
 	s->s_flags |= SB_RDONLY;	/* Yup, read-only yet */
+	s->s_time_min = 0;
+	s->s_time_max = U32_MAX;
 
 	/* Check the superblock signature. Since the qnx4 code is
 	   dangerous, we should leave as quickly as possible
diff --git a/fs/qnx6/inode.c b/fs/qnx6/inode.c
index 0f8b0ff1ba43..345db56c98fd 100644
--- a/fs/qnx6/inode.c
+++ b/fs/qnx6/inode.c
@@ -429,6 +429,8 @@ static int qnx6_fill_super(struct super_block *s, void *data, int silent)
 	s->s_op = &qnx6_sops;
 	s->s_magic = QNX6_SUPER_MAGIC;
 	s->s_flags |= SB_RDONLY;        /* Yup, read-only yet */
+	s->s_time_min = 0;
+	s->s_time_max = U32_MAX;
 
 	/* ease the later tree level calculations */
 	sbi = QNX6_SB(s);
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index ab028ea0e561..d69b4ac0ae2f 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1976,6 +1976,9 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
 		goto error_unlocked;
 	}
 
+	s->s_time_min = 0;
+	s->s_time_max = U32_MAX;
+
 	rs = SB_DISK_SUPER_BLOCK(s);
 	/*
 	 * Let's do basic sanity check to verify that underlying device is not
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index 7d580f7c3f1d..a42c0e3079dc 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -478,6 +478,8 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_maxbytes = 0xFFFFFFFF;
 	sb->s_magic = ROMFS_MAGIC;
 	sb->s_flags |= SB_RDONLY | SB_NOATIME;
+	sb->s_time_min = 0;
+	sb->s_time_max = 0;
 	sb->s_op = &romfs_super_ops;
 
 #ifdef CONFIG_ROMFS_ON_MTD
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index effa638d6d85..a9e9837617a9 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -183,6 +183,8 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
 		(u64) le64_to_cpu(sblk->id_table_start));
 
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
+	sb->s_time_min = 0;
+	sb->s_time_max = U32_MAX;
 	sb->s_flags |= SB_RDONLY;
 	sb->s_op = &squashfs_super_ops;
 
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 4ed0dca52ec8..1da0be667409 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -843,6 +843,10 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
 
+	sb->s_time_gran = NSEC_PER_SEC;
+	sb->s_time_min = S32_MIN;
+	sb->s_time_max = S32_MAX;
+
 	switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
 	case UFS_MOUNT_UFSTYPE_44BSD:
 		UFSD("ufstype=44bsd\n");
@@ -861,6 +865,9 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 		uspi->s_fshift = 9;
 		uspi->s_sbsize = super_block_size = 1536;
 		uspi->s_sbbase =  0;
+		sb->s_time_gran = 1;
+		sb->s_time_min = S64_MIN;
+		sb->s_time_max = S64_MAX;
 		flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
 		break;
 		
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index a14d11d78bd8..1a0daf46bae8 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1685,6 +1685,8 @@ xfs_fs_fill_super(
 	sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
 	sb->s_max_links = XFS_MAXLINK;
 	sb->s_time_gran = 1;
+	sb->s_time_min = S32_MIN;
+	sb->s_time_max = S32_MAX;
 	set_posix_acl_flag(sb);
 
 	/* version 5 superblocks support inode version counters. */
-- 
2.17.1


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Re: [PATCH 03/20] timestamp_truncate: Replace users of timespec64_trunc

[OGAWA Hirofumi]

Deepa Dinamani <deepa.kernel@gmail.com> writes:

> diff --git a/fs/fat/misc.c b/fs/fat/misc.c
> index 1e08bd54c5fb..53bb7c6bf993 100644
> --- a/fs/fat/misc.c
> +++ b/fs/fat/misc.c
> @@ -307,8 +307,9 @@ int fat_truncate_time(struct inode *inode, struct timespec64 *now, int flags)
>  		inode->i_atime = (struct timespec64){ seconds, 0 };
>  	}
>  	if (flags & S_CTIME) {
> -		if (sbi->options.isvfat)
> -			inode->i_ctime = timespec64_trunc(*now, 10000000);
> +		if (sbi->options.isvfat) {
> +			inode->i_ctime = timestamp_truncate(*now, inode);
> +		}
>  		else
>  			inode->i_ctime = fat_timespec64_trunc_2secs(*now);
>  	}

Looks like broken. It changed to sb->s_time_gran from 10000000, and
changed coding style.

Thanks.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

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Re: [PATCH 03/20] timestamp_truncate: Replace users of timespec64_trunc

[Deepa Dinamani]

On Tue, Jul 30, 2019 at 1:27 AM OGAWA Hirofumi
<hirofumi@mail.parknet.co.jp> wrote:
>
> Deepa Dinamani <deepa.kernel@gmail.com> writes:
>
> > diff --git a/fs/fat/misc.c b/fs/fat/misc.c
> > index 1e08bd54c5fb..53bb7c6bf993 100644
> > --- a/fs/fat/misc.c
> > +++ b/fs/fat/misc.c
> > @@ -307,8 +307,9 @@ int fat_truncate_time(struct inode *inode, struct timespec64 *now, int flags)
> >               inode->i_atime = (struct timespec64){ seconds, 0 };
> >       }
> >       if (flags & S_CTIME) {
> > -             if (sbi->options.isvfat)
> > -                     inode->i_ctime = timespec64_trunc(*now, 10000000);
> > +             if (sbi->options.isvfat) {
> > +                     inode->i_ctime = timestamp_truncate(*now, inode);
> > +             }
> >               else
> >                       inode->i_ctime = fat_timespec64_trunc_2secs(*now);
> >       }
>
> Looks like broken. It changed to sb->s_time_gran from 10000000, and
> changed coding style.

This is using a new api: timestamp_truncate(). granularity is gotten
by inode->sb->s_time_gran. See Patch [2/20]:
https://lkml.org/lkml/2019/7/29/1853

So this is not broken if fat is filling in the right granularity in the sb.

-Deepa

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Re: [PATCH 03/20] timestamp_truncate: Replace users of timespec64_trunc

[Anton Altaparmakov]

Hi Deepa,

> On 30 Jul 2019, at 18:26, Deepa Dinamani <deepa.kernel@gmail.com> wrote:
> 
> On Tue, Jul 30, 2019 at 1:27 AM OGAWA Hirofumi
> <hirofumi@mail.parknet.co.jp> wrote:
>> 
>> Deepa Dinamani <deepa.kernel@gmail.com> writes:
>> 
>>> diff --git a/fs/fat/misc.c b/fs/fat/misc.c
>>> index 1e08bd54c5fb..53bb7c6bf993 100644
>>> --- a/fs/fat/misc.c
>>> +++ b/fs/fat/misc.c
>>> @@ -307,8 +307,9 @@ int fat_truncate_time(struct inode *inode, struct timespec64 *now, int flags)
>>>              inode->i_atime = (struct timespec64){ seconds, 0 };
>>>      }
>>>      if (flags & S_CTIME) {
>>> -             if (sbi->options.isvfat)
>>> -                     inode->i_ctime = timespec64_trunc(*now, 10000000);
>>> +             if (sbi->options.isvfat) {
>>> +                     inode->i_ctime = timestamp_truncate(*now, inode);
>>> +             }
>>>              else
>>>                      inode->i_ctime = fat_timespec64_trunc_2secs(*now);
>>>      }
>> 
>> Looks like broken. It changed to sb->s_time_gran from 10000000, and
>> changed coding style.
> 
> This is using a new api: timestamp_truncate(). granularity is gotten
> by inode->sb->s_time_gran. See Patch [2/20]:
> https://lkml.org/lkml/2019/7/29/1853
> 
> So this is not broken if fat is filling in the right granularity in the sb.

It is broken for FAT because FAT has different granularities for different timestamps so it cannot put the correct value in the sb as that only allows one granularity.  Your patch is totally broken for fat as it would be immediately obvious if you spent a few minutes looking at the code...

Best regards,

	Anton

> 
> -Deepa


-- 
Anton Altaparmakov <anton at tuxera.com> (replace at with @)
Lead in File System Development, Tuxera Inc., http://www.tuxera.com/
Linux NTFS maintainer


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Re: [PATCH 03/20] timestamp_truncate: Replace users of timespec64_trunc

[Deepa Dinamani]

On Tue, Jul 30, 2019 at 3:28 PM Anton Altaparmakov <anton@tuxera.com> wrote:
>
> Hi Deepa,
>
> > On 30 Jul 2019, at 18:26, Deepa Dinamani <deepa.kernel@gmail.com> wrote:
> >
> > On Tue, Jul 30, 2019 at 1:27 AM OGAWA Hirofumi
> > <hirofumi@mail.parknet.co.jp> wrote:
> >>
> >> Deepa Dinamani <deepa.kernel@gmail.com> writes:
> >>
> >>> diff --git a/fs/fat/misc.c b/fs/fat/misc.c
> >>> index 1e08bd54c5fb..53bb7c6bf993 100644
> >>> --- a/fs/fat/misc.c
> >>> +++ b/fs/fat/misc.c
> >>> @@ -307,8 +307,9 @@ int fat_truncate_time(struct inode *inode, struct timespec64 *now, int flags)
> >>>              inode->i_atime = (struct timespec64){ seconds, 0 };
> >>>      }
> >>>      if (flags & S_CTIME) {
> >>> -             if (sbi->options.isvfat)
> >>> -                     inode->i_ctime = timespec64_trunc(*now, 10000000);
> >>> +             if (sbi->options.isvfat) {
> >>> +                     inode->i_ctime = timestamp_truncate(*now, inode);
> >>> +             }
> >>>              else
> >>>                      inode->i_ctime = fat_timespec64_trunc_2secs(*now);
> >>>      }
> >>
> >> Looks like broken. It changed to sb->s_time_gran from 10000000, and
> >> changed coding style.
> >
> > This is using a new api: timestamp_truncate(). granularity is gotten
> > by inode->sb->s_time_gran. See Patch [2/20]:
> > https://lkml.org/lkml/2019/7/29/1853
> >
> > So this is not broken if fat is filling in the right granularity in the sb.
>
> It is broken for FAT because FAT has different granularities for different timestamps so it cannot put the correct value in the sb as that only allows one granularity.  Your patch is totally broken for fat as it would be immediately obvious if you spent a few minutes looking at the code...

It seemed to me that FAT had already covered the special cases (2s and
1d) granularities by using internal functions. This one could also be
an inlined calculation, but I will just drop the FAT part from this
patch and leave it as is for now.

Thanks,
Deepa

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Re: [PATCH 06/20] fs: Fill in max and min timestamps in superblock

[Darrick J. Wong]

On Mon, Jul 29, 2019 at 06:49:10PM -0700, Deepa Dinamani wrote:
> Fill in the appropriate limits to avoid inconsistencies
> in the vfs cached inode times when timestamps are
> outside the permitted range.
> 
> Even though some filesystems are read-only, fill in the
> timestamps to reflect the on-disk representation.
> 
> Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
> Cc: aivazian.tigran@gmail.com
> Cc: al@alarsen.net
> Cc: coda@cs.cmu.edu
> Cc: darrick.wong@oracle.com
> Cc: dushistov@mail.ru
> Cc: dwmw2@infradead.org
> Cc: hch@infradead.org
> Cc: jack@suse.com
> Cc: jaharkes@cs.cmu.edu
> Cc: luisbg@kernel.org
> Cc: nico@fluxnic.net
> Cc: phillip@squashfs.org.uk
> Cc: richard@nod.at
> Cc: salah.triki@gmail.com
> Cc: shaggy@kernel.org
> Cc: linux-xfs@vger.kernel.org
> Cc: codalist@coda.cs.cmu.edu
> Cc: linux-ext4@vger.kernel.org
> Cc: linux-mtd@lists.infradead.org
> Cc: jfs-discussion@lists.sourceforge.net
> Cc: reiserfs-devel@vger.kernel.org
> ---
>  fs/befs/linuxvfs.c       | 2 ++
>  fs/bfs/inode.c           | 2 ++
>  fs/coda/inode.c          | 3 +++
>  fs/cramfs/inode.c        | 2 ++
>  fs/efs/super.c           | 2 ++
>  fs/ext2/super.c          | 2 ++
>  fs/freevxfs/vxfs_super.c | 2 ++
>  fs/jffs2/fs.c            | 3 +++
>  fs/jfs/super.c           | 2 ++
>  fs/minix/inode.c         | 2 ++
>  fs/qnx4/inode.c          | 2 ++
>  fs/qnx6/inode.c          | 2 ++
>  fs/reiserfs/super.c      | 3 +++
>  fs/romfs/super.c         | 2 ++
>  fs/squashfs/super.c      | 2 ++
>  fs/ufs/super.c           | 7 +++++++
>  fs/xfs/xfs_super.c       | 2 ++
>  17 files changed, 42 insertions(+)
> 
> diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
> index 462d096ff3e9..64cdf4d8e424 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);
> diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
> index 5e97bed073d7..f8ce1368218b 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);
>  
> diff --git a/fs/coda/inode.c b/fs/coda/inode.c
> index 321f56e487cb..b1c70e2b9b1e 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)
> diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
> index 9352487bd0fc..4d1d8b7761ed 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))
> diff --git a/fs/efs/super.c b/fs/efs/super.c
> index 867fc24dee20..4a6ebff2af76 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)) {
> diff --git a/fs/ext2/super.c b/fs/ext2/super.c
> index 44eb6e7eb492..baa36c6fb71e 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;
> diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
> index a89f68c3cbed..578a5062706e 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))) {
> diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
> index 8a20ddd25f2d..d0b59d03a7a9 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;
> diff --git a/fs/jfs/super.c b/fs/jfs/super.c
> index f4e10cb9f734..b2dc4d1f9dcc 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;
> diff --git a/fs/minix/inode.c b/fs/minix/inode.c
> index f96073f25432..7cb5fd38eb14 100644
> --- a/fs/minix/inode.c
> +++ b/fs/minix/inode.c
> @@ -277,6 +277,8 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
>  
>  	/* set up enough so that it can read an inode */
>  	s->s_op = &minix_sops;
> +	s->s_time_min = 0;
> +	s->s_time_max = U32_MAX;
>  	root_inode = minix_iget(s, MINIX_ROOT_INO);
>  	if (IS_ERR(root_inode)) {
>  		ret = PTR_ERR(root_inode);
> diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
> index 922d083bbc7c..e8da1cde87b9 100644
> --- a/fs/qnx4/inode.c
> +++ b/fs/qnx4/inode.c
> @@ -201,6 +201,8 @@ static int qnx4_fill_super(struct super_block *s, void *data, int silent)
>  	s->s_op = &qnx4_sops;
>  	s->s_magic = QNX4_SUPER_MAGIC;
>  	s->s_flags |= SB_RDONLY;	/* Yup, read-only yet */
> +	s->s_time_min = 0;
> +	s->s_time_max = U32_MAX;
>  
>  	/* Check the superblock signature. Since the qnx4 code is
>  	   dangerous, we should leave as quickly as possible
> diff --git a/fs/qnx6/inode.c b/fs/qnx6/inode.c
> index 0f8b0ff1ba43..345db56c98fd 100644
> --- a/fs/qnx6/inode.c
> +++ b/fs/qnx6/inode.c
> @@ -429,6 +429,8 @@ static int qnx6_fill_super(struct super_block *s, void *data, int silent)
>  	s->s_op = &qnx6_sops;
>  	s->s_magic = QNX6_SUPER_MAGIC;
>  	s->s_flags |= SB_RDONLY;        /* Yup, read-only yet */
> +	s->s_time_min = 0;
> +	s->s_time_max = U32_MAX;
>  
>  	/* ease the later tree level calculations */
>  	sbi = QNX6_SB(s);
> diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
> index ab028ea0e561..d69b4ac0ae2f 100644
> --- a/fs/reiserfs/super.c
> +++ b/fs/reiserfs/super.c
> @@ -1976,6 +1976,9 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
>  		goto error_unlocked;
>  	}
>  
> +	s->s_time_min = 0;
> +	s->s_time_max = U32_MAX;
> +
>  	rs = SB_DISK_SUPER_BLOCK(s);
>  	/*
>  	 * Let's do basic sanity check to verify that underlying device is not
> diff --git a/fs/romfs/super.c b/fs/romfs/super.c
> index 7d580f7c3f1d..a42c0e3079dc 100644
> --- a/fs/romfs/super.c
> +++ b/fs/romfs/super.c
> @@ -478,6 +478,8 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
>  	sb->s_maxbytes = 0xFFFFFFFF;
>  	sb->s_magic = ROMFS_MAGIC;
>  	sb->s_flags |= SB_RDONLY | SB_NOATIME;
> +	sb->s_time_min = 0;
> +	sb->s_time_max = 0;
>  	sb->s_op = &romfs_super_ops;
>  
>  #ifdef CONFIG_ROMFS_ON_MTD
> diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
> index effa638d6d85..a9e9837617a9 100644
> --- a/fs/squashfs/super.c
> +++ b/fs/squashfs/super.c
> @@ -183,6 +183,8 @@ static int squashfs_fill_super(struct super_block *sb, void *data, int silent)
>  		(u64) le64_to_cpu(sblk->id_table_start));
>  
>  	sb->s_maxbytes = MAX_LFS_FILESIZE;
> +	sb->s_time_min = 0;
> +	sb->s_time_max = U32_MAX;
>  	sb->s_flags |= SB_RDONLY;
>  	sb->s_op = &squashfs_super_ops;
>  
> diff --git a/fs/ufs/super.c b/fs/ufs/super.c
> index 4ed0dca52ec8..1da0be667409 100644
> --- a/fs/ufs/super.c
> +++ b/fs/ufs/super.c
> @@ -843,6 +843,10 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
>  
>  	sb->s_maxbytes = MAX_LFS_FILESIZE;
>  
> +	sb->s_time_gran = NSEC_PER_SEC;
> +	sb->s_time_min = S32_MIN;
> +	sb->s_time_max = S32_MAX;
> +
>  	switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
>  	case UFS_MOUNT_UFSTYPE_44BSD:
>  		UFSD("ufstype=44bsd\n");
> @@ -861,6 +865,9 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
>  		uspi->s_fshift = 9;
>  		uspi->s_sbsize = super_block_size = 1536;
>  		uspi->s_sbbase =  0;
> +		sb->s_time_gran = 1;
> +		sb->s_time_min = S64_MIN;
> +		sb->s_time_max = S64_MAX;
>  		flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
>  		break;
>  		
> diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
> index a14d11d78bd8..1a0daf46bae8 100644
> --- a/fs/xfs/xfs_super.c
> +++ b/fs/xfs/xfs_super.c
> @@ -1685,6 +1685,8 @@ xfs_fs_fill_super(
>  	sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
>  	sb->s_max_links = XFS_MAXLINK;
>  	sb->s_time_gran = 1;
> +	sb->s_time_min = S32_MIN;
> +	sb->s_time_max = S32_MAX;

For the XFS part,

Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>

--D

>  	set_posix_acl_flag(sb);
>  
>  	/* version 5 superblocks support inode version counters. */
> -- 
> 2.17.1
> 

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