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Diffstat (limited to 'fs/inode.c')
-rw-r--r--fs/inode.c31
1 files changed, 22 insertions, 9 deletions
diff --git a/fs/inode.c b/fs/inode.c
index ea37cd17b53f..e8d62688ed91 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -152,6 +152,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
inode->i_pipe = NULL;
inode->i_bdev = NULL;
inode->i_cdev = NULL;
+ inode->i_link = NULL;
inode->i_rdev = 0;
inode->dirtied_when = 0;
@@ -1584,36 +1585,47 @@ static int update_time(struct inode *inode, struct timespec *time, int flags)
* This function automatically handles read only file systems and media,
* as well as the "noatime" flag and inode specific "noatime" markers.
*/
-void touch_atime(const struct path *path)
+bool atime_needs_update(const struct path *path, struct inode *inode)
{
struct vfsmount *mnt = path->mnt;
- struct inode *inode = d_inode(path->dentry);
struct timespec now;
if (inode->i_flags & S_NOATIME)
- return;
+ return false;
if (IS_NOATIME(inode))
- return;
+ return false;
if ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))
- return;
+ return false;
if (mnt->mnt_flags & MNT_NOATIME)
- return;
+ return false;
if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
- return;
+ return false;
now = current_fs_time(inode->i_sb);
if (!relatime_need_update(mnt, inode, now))
- return;
+ return false;
if (timespec_equal(&inode->i_atime, &now))
+ return false;
+
+ return true;
+}
+
+void touch_atime(const struct path *path)
+{
+ struct vfsmount *mnt = path->mnt;
+ struct inode *inode = d_inode(path->dentry);
+ struct timespec now;
+
+ if (!atime_needs_update(path, inode))
return;
if (!sb_start_write_trylock(inode->i_sb))
return;
- if (__mnt_want_write(mnt))
+ if (__mnt_want_write(mnt) != 0)
goto skip_update;
/*
* File systems can error out when updating inodes if they need to
@@ -1624,6 +1636,7 @@ void touch_atime(const struct path *path)
* We may also fail on filesystems that have the ability to make parts
* of the fs read only, e.g. subvolumes in Btrfs.
*/
+ now = current_fs_time(inode->i_sb);
update_time(inode, &now, S_ATIME);
__mnt_drop_write(mnt);
skip_update: