ovl: Do not expose metacopy only dentry from d_real()
Metacopy dentry/inode is internal to overlay and is never exposed outside of it. Exception is metacopy upper file used for fsync(). Modify d_real() to look for dentries/inode which have data, but also allow matching upper inode without data for the fsync case. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
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@ -95,10 +95,13 @@ static struct dentry *ovl_d_real(struct dentry *dentry,
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}
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real = ovl_dentry_upper(dentry);
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if (real && (!inode || inode == d_inode(real)))
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if (real && (inode == d_inode(real)))
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return real;
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real = ovl_dentry_lower(dentry);
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if (real && !inode && ovl_has_upperdata(d_inode(dentry)))
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return real;
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real = ovl_dentry_lowerdata(dentry);
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if (!real)
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goto bug;
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