fs: Replace CURRENT_TIME with current_time() for inode timestamps

CURRENT_TIME macro is not appropriate for filesystems as it
doesn't use the right granularity for filesystem timestamps.
Use current_time() instead.

CURRENT_TIME is also not y2038 safe.

This is also in preparation for the patch that transitions
vfs timestamps to use 64 bit time and hence make them
y2038 safe. As part of the effort current_time() will be
extended to do range checks. Hence, it is necessary for all
file system timestamps to use current_time(). Also,
current_time() will be transitioned along with vfs to be
y2038 safe.

Note that whenever a single call to current_time() is used
to change timestamps in different inodes, it is because they
share the same time granularity.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Felipe Balbi <balbi@kernel.org>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Acked-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Acked-by: David Sterba <dsterba@suse.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/powerpc/platforms/cell/spufs/inode.c

@@ -103,7 +103,7 @@ spufs_new_inode(struct super_block *sb, umode_t mode)
 	inode->i_mode = mode;
 	inode->i_uid = current_fsuid();
 	inode->i_gid = current_fsgid();
-	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
 out:
 	return inode;
 }

arch/s390/hypfs/inode.c

@@ -51,7 +51,7 @@ static void hypfs_update_update(struct super_block *sb)
 	struct inode *inode = d_inode(sb_info->update_file);
 
 	sb_info->last_update = get_seconds();
-	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
 }
 
 /* directory tree removal functions */
@@ -99,7 +99,7 @@ static struct inode *hypfs_make_inode(struct super_block *sb, umode_t mode)
 		ret->i_mode = mode;
 		ret->i_uid = hypfs_info->uid;
 		ret->i_gid = hypfs_info->gid;
-		ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
+		ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret);
 		if (S_ISDIR(mode))
 			set_nlink(ret, 2);
 	}

drivers/infiniband/hw/qib/qib_fs.c

@@ -64,7 +64,7 @@ static int qibfs_mknod(struct inode *dir, struct dentry *dentry,
 	inode->i_uid = GLOBAL_ROOT_UID;
 	inode->i_gid = GLOBAL_ROOT_GID;
 	inode->i_blocks = 0;
-	inode->i_atime = CURRENT_TIME;
+	inode->i_atime = current_time(inode);
 	inode->i_mtime = inode->i_atime;
 	inode->i_ctime = inode->i_atime;
 	inode->i_private = data;

drivers/misc/ibmasm/ibmasmfs.c

@@ -144,7 +144,7 @@ static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode)
 	if (ret) {
 		ret->i_ino = get_next_ino();
 		ret->i_mode = mode;
-		ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
+		ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret);
 	}
 	return ret;
 }

drivers/oprofile/oprofilefs.c

@@ -30,7 +30,7 @@ static struct inode *oprofilefs_get_inode(struct super_block *sb, int mode)
 	if (inode) {
 		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
-		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+		inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
 	}
 	return inode;
 }

drivers/usb/core/devio.c

@@ -2409,21 +2409,21 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
 		snoop(&dev->dev, "%s: CONTROL\n", __func__);
 		ret = proc_control(ps, p);
 		if (ret >= 0)
-			inode->i_mtime = CURRENT_TIME;
+			inode->i_mtime = current_time(inode);
 		break;
 
 	case USBDEVFS_BULK:
 		snoop(&dev->dev, "%s: BULK\n", __func__);
 		ret = proc_bulk(ps, p);
 		if (ret >= 0)
-			inode->i_mtime = CURRENT_TIME;
+			inode->i_mtime = current_time(inode);
 		break;
 
 	case USBDEVFS_RESETEP:
 		snoop(&dev->dev, "%s: RESETEP\n", __func__);
 		ret = proc_resetep(ps, p);
 		if (ret >= 0)
-			inode->i_mtime = CURRENT_TIME;
+			inode->i_mtime = current_time(inode);
 		break;
 
 	case USBDEVFS_RESET:
@@ -2435,7 +2435,7 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
 		snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
 		ret = proc_clearhalt(ps, p);
 		if (ret >= 0)
-			inode->i_mtime = CURRENT_TIME;
+			inode->i_mtime = current_time(inode);
 		break;
 
 	case USBDEVFS_GETDRIVER:
@@ -2462,22 +2462,22 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
 		snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
 		ret = proc_submiturb(ps, p);
 		if (ret >= 0)
-			inode->i_mtime = CURRENT_TIME;
+			inode->i_mtime = current_time(inode);
 		break;
 
 #ifdef CONFIG_COMPAT
 	case USBDEVFS_CONTROL32:
 		snoop(&dev->dev, "%s: CONTROL32\n", __func__);
 		ret = proc_control_compat(ps, p);
 		if (ret >= 0)
-			inode->i_mtime = CURRENT_TIME;
+			inode->i_mtime = current_time(inode);
 		break;
 
 	case USBDEVFS_BULK32:
 		snoop(&dev->dev, "%s: BULK32\n", __func__);
 		ret = proc_bulk_compat(ps, p);
 		if (ret >= 0)
-			inode->i_mtime = CURRENT_TIME;
+			inode->i_mtime = current_time(inode);
 		break;
 
 	case USBDEVFS_DISCSIGNAL32:
@@ -2489,7 +2489,7 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
 		snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
 		ret = proc_submiturb_compat(ps, p);
 		if (ret >= 0)
-			inode->i_mtime = CURRENT_TIME;
+			inode->i_mtime = current_time(inode);
 		break;
 
 	case USBDEVFS_IOCTL32:
@@ -2552,7 +2552,7 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
  done:
 	usb_unlock_device(dev);
 	if (ret >= 0)
-		inode->i_atime = CURRENT_TIME;
+		inode->i_atime = current_time(inode);
 	return ret;
 }
 

drivers/usb/gadget/function/f_fs.c

@@ -1193,15 +1193,15 @@ ffs_sb_make_inode(struct super_block *sb, void *data,
 	inode = new_inode(sb);
 
 	if (likely(inode)) {
-		struct timespec current_time = CURRENT_TIME;
+		struct timespec ts = current_time(inode);
 
 		inode->i_ino	 = get_next_ino();
 		inode->i_mode    = perms->mode;
 		inode->i_uid     = perms->uid;
 		inode->i_gid     = perms->gid;
-		inode->i_atime   = current_time;
-		inode->i_mtime   = current_time;
-		inode->i_ctime   = current_time;
+		inode->i_atime   = ts;
+		inode->i_mtime   = ts;
+		inode->i_ctime   = ts;
 		inode->i_private = data;
 		if (fops)
 			inode->i_fop = fops;

drivers/usb/gadget/legacy/inode.c

@@ -1913,7 +1913,7 @@ gadgetfs_make_inode (struct super_block *sb,
 		inode->i_uid = make_kuid(&init_user_ns, default_uid);
 		inode->i_gid = make_kgid(&init_user_ns, default_gid);
 		inode->i_atime = inode->i_mtime = inode->i_ctime
-				= CURRENT_TIME;
+				= current_time(inode);
 		inode->i_private = data;
 		inode->i_fop = fops;
 	}

fs/9p/vfs_inode.c

@@ -276,7 +276,7 @@ int v9fs_init_inode(struct v9fs_session_info *v9ses,
 	inode_init_owner(inode, NULL, mode);
 	inode->i_blocks = 0;
 	inode->i_rdev = rdev;
-	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
 	inode->i_mapping->a_ops = &v9fs_addr_operations;
 
 	switch (mode & S_IFMT) {

fs/adfs/inode.c

@@ -199,7 +199,7 @@ adfs_adfs2unix_time(struct timespec *tv, struct inode *inode)
 	return;
 
  cur_time:
-	*tv = CURRENT_TIME;
+	*tv = current_time(inode);
 	return;
 
  too_early:

fs/autofs4/inode.c

@@ -359,7 +359,7 @@ struct inode *autofs4_get_inode(struct super_block *sb, umode_t mode)
 		inode->i_uid = d_inode(sb->s_root)->i_uid;
 		inode->i_gid = d_inode(sb->s_root)->i_gid;
 	}
-	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
 	inode->i_ino = get_next_ino();
 
 	if (S_ISDIR(mode)) {

fs/autofs4/root.c

@@ -591,7 +591,7 @@ static int autofs4_dir_symlink(struct inode *dir,
 	if (p_ino && !IS_ROOT(dentry))
 		atomic_inc(&p_ino->count);
 
-	dir->i_mtime = CURRENT_TIME;
+	dir->i_mtime = current_time(dir);
 
 	return 0;
 }
@@ -631,7 +631,7 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
 	d_inode(dentry)->i_size = 0;
 	clear_nlink(d_inode(dentry));
 
-	dir->i_mtime = CURRENT_TIME;
+	dir->i_mtime = current_time(dir);
 
 	spin_lock(&sbi->lookup_lock);
 	__autofs4_add_expiring(dentry);
@@ -762,7 +762,7 @@ static int autofs4_dir_mkdir(struct inode *dir,
 	if (p_ino && !IS_ROOT(dentry))
 		atomic_inc(&p_ino->count);
 	inc_nlink(dir);
-	dir->i_mtime = CURRENT_TIME;
+	dir->i_mtime = current_time(dir);
 
 	return 0;
 }

fs/devpts/inode.c

@@ -305,7 +305,7 @@ static int mknod_ptmx(struct super_block *sb)
 	}
 
 	inode->i_ino = 2;
-	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 
 	mode = S_IFCHR|opts->ptmxmode;
 	init_special_inode(inode, mode, MKDEV(TTYAUX_MAJOR, 2));
@@ -411,7 +411,7 @@ devpts_fill_super(struct super_block *s, void *data, int silent)
 	if (!inode)
 		goto fail;
 	inode->i_ino = 1;
-	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 	inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR;
 	inode->i_op = &simple_dir_inode_operations;
 	inode->i_fop = &simple_dir_operations;
@@ -559,7 +559,7 @@ struct dentry *devpts_pty_new(struct pts_fs_info *fsi, int index, void *priv)
 	inode->i_ino = index + 3;
 	inode->i_uid = opts->setuid ? opts->uid : current_fsuid();
 	inode->i_gid = opts->setgid ? opts->gid : current_fsgid();
-	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 	init_special_inode(inode, S_IFCHR|opts->mode, MKDEV(UNIX98_PTY_SLAVE_MAJOR, index));
 
 	sprintf(s, "%d", index);

fs/efivarfs/inode.c

@@ -24,7 +24,7 @@ struct inode *efivarfs_get_inode(struct super_block *sb,
 	if (inode) {
 		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
-		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+		inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
 		inode->i_flags = is_removable ? 0 : S_IMMUTABLE;
 		switch (mode & S_IFMT) {
 		case S_IFREG:

fs/exofs/dir.c

@@ -416,7 +416,7 @@ int exofs_set_link(struct inode *dir, struct exofs_dir_entry *de,
 	if (likely(!err))
 		err = exofs_commit_chunk(page, pos, len);
 	exofs_put_page(page);
-	dir->i_mtime = dir->i_ctime = CURRENT_TIME;
+	dir->i_mtime = dir->i_ctime = current_time(dir);
 	mark_inode_dirty(dir);
 	return err;
 }
@@ -503,7 +503,7 @@ int exofs_add_link(struct dentry *dentry, struct inode *inode)
 	de->inode_no = cpu_to_le64(inode->i_ino);
 	exofs_set_de_type(de, inode);
 	err = exofs_commit_chunk(page, pos, rec_len);
-	dir->i_mtime = dir->i_ctime = CURRENT_TIME;
+	dir->i_mtime = dir->i_ctime = current_time(dir);
 	mark_inode_dirty(dir);
 	sbi->s_numfiles++;
 
@@ -554,7 +554,7 @@ int exofs_delete_entry(struct exofs_dir_entry *dir, struct page *page)
 	dir->inode_no = 0;
 	if (likely(!err))
 		err = exofs_commit_chunk(page, pos, to - from);
-	inode->i_ctime = inode->i_mtime = CURRENT_TIME;
+	inode->i_ctime = inode->i_mtime = current_time(inode);
 	mark_inode_dirty(inode);
 	sbi->s_numfiles--;
 out:

fs/exofs/inode.c

@@ -1007,7 +1007,7 @@ static int _do_truncate(struct inode *inode, loff_t newsize)
 	struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
 	int ret;
 
-	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	inode->i_mtime = inode->i_ctime = current_time(inode);
 
 	ret = ore_truncate(&sbi->layout, &oi->oc, (u64)newsize);
 	if (likely(!ret))
@@ -1313,7 +1313,7 @@ struct inode *exofs_new_inode(struct inode *dir, umode_t mode)
 	inode_init_owner(inode, dir, mode);
 	inode->i_ino = sbi->s_nextid++;
 	inode->i_blkbits = EXOFS_BLKSHIFT;
-	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 	oi->i_commit_size = inode->i_size = 0;
 	spin_lock(&sbi->s_next_gen_lock);
 	inode->i_generation = sbi->s_next_generation++;

fs/exofs/namei.c

@@ -142,7 +142,7 @@ static int exofs_link(struct dentry *old_dentry, struct inode *dir,
 {
 	struct inode *inode = d_inode(old_dentry);
 
-	inode->i_ctime = CURRENT_TIME;
+	inode->i_ctime = current_time(inode);
 	inode_inc_link_count(inode);
 	ihold(inode);
 
@@ -261,7 +261,7 @@ static int exofs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		if (!new_de)
 			goto out_dir;
 		err = exofs_set_link(new_dir, new_de, new_page, old_inode);
-		new_inode->i_ctime = CURRENT_TIME;
+		new_inode->i_ctime = current_time(new_inode);
 		if (dir_de)
 			drop_nlink(new_inode);
 		inode_dec_link_count(new_inode);
@@ -275,7 +275,7 @@ static int exofs_rename(struct inode *old_dir, struct dentry *old_dentry,
 			inode_inc_link_count(new_dir);
 	}
 
-	old_inode->i_ctime = CURRENT_TIME;
+	old_inode->i_ctime = current_time(old_inode);
 
 	exofs_delete_entry(old_de, old_page);
 	mark_inode_dirty(old_inode);

fs/ext2/super.c

@@ -1543,7 +1543,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
 	if (inode->i_size < off+len-towrite)
 		i_size_write(inode, off+len-towrite);
 	inode->i_version++;
-	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	inode->i_mtime = inode->i_ctime = current_time(inode);
 	mark_inode_dirty(inode);
 	return len - towrite;
 }

fs/f2fs/dir.c

@@ -299,7 +299,7 @@ void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
 	f2fs_dentry_kunmap(dir, page);
 	set_page_dirty(page);
 
-	dir->i_mtime = dir->i_ctime = CURRENT_TIME;
+	dir->i_mtime = dir->i_ctime = current_time(dir);
 	f2fs_mark_inode_dirty_sync(dir);
 	f2fs_put_page(page, 1);
 }
@@ -451,7 +451,7 @@ void update_parent_metadata(struct inode *dir, struct inode *inode,
 			f2fs_i_links_write(dir, true);
 		clear_inode_flag(inode, FI_NEW_INODE);
 	}
-	dir->i_mtime = dir->i_ctime = CURRENT_TIME;
+	dir->i_mtime = dir->i_ctime = current_time(dir);
 	f2fs_mark_inode_dirty_sync(dir);
 
 	if (F2FS_I(dir)->i_current_depth != current_depth)
@@ -656,7 +656,7 @@ void f2fs_drop_nlink(struct inode *dir, struct inode *inode)
 
 	if (S_ISDIR(inode->i_mode))
 		f2fs_i_links_write(dir, false);
-	inode->i_ctime = CURRENT_TIME;
+	inode->i_ctime = current_time(inode);
 
 	f2fs_i_links_write(inode, false);
 	if (S_ISDIR(inode->i_mode)) {
@@ -703,7 +703,7 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
 	kunmap(page); /* kunmap - pair of f2fs_find_entry */
 	set_page_dirty(page);
 
-	dir->i_ctime = dir->i_mtime = CURRENT_TIME;
+	dir->i_ctime = dir->i_mtime = current_time(dir);
 	f2fs_mark_inode_dirty_sync(dir);
 
 	if (inode)