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>

3 files changed, 14 insertions, 14 deletions

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 09c8d9ca61ae..4016dae7433b 100644
--- a/drivers/usb/core/devio.c
+++ b/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:
@@ -2462,7 +2462,7 @@ 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
@@ -2470,14 +2470,14 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
 		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;
 }
 
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 5c8429f23a89..2f3fa4dde695 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/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;
diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index 16104b5ebdcb..bd82dd12deff 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/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;
 	}