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ovl: fix relatime for directories

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Need to treat non-regular overlayfs files the same as regular files when
checking for an atime update.

Add a d_real() flag to make it return the upper dentry for all file types.

Reported-by: "zhangyi (F)" <yi.zhang@huawei.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2017-09-05 12:53:11 +02:00
parent 495e642939
commit cd91304e71
3 changed files with 23 additions and 4 deletions
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3
include/linux/dcache.h
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@ -562,6 +562,9 @@ static inline struct dentry *d_backing_dentry(struct dentry *upper)
return upper;
}
/* d_real() flags */
#define D_REAL_UPPER 0x2 /* return upper dentry or NULL if non-upper */
/**
* d_real - Return the real dentry
* @dentry: the dentry to query