ext/spl: DirectoryIterator to support modern filesytems. #20705
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With filesystems with builtin large capacity such as ZFS, Btfrs, NTFS or even ext4 with large_dir feature enabled, an int to represent an entry index is falling short, thus risking overflows. A zend_long however should cover this need without increasing out internal data structure.
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| PR after discussing it with @Girgias. As she said, the change even fills the existing padding in the inner directory struct on 64 bits. |
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| Makes sense. Could even be unsigned? |
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| in practice, there is no actual FS able to handle a number of directory entries remotely close to |
ndossche approved these changes Dec 14, 2025
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Checked all uses of u.dir.index and seems fine. Thanks.
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With filesystems with builtin large capacity such as ZFS, Btfrs, NTFS
or even ext4 with large_dir feature enabled, an int to represent an
entry index is falling short, thus risking overflows.
A zend_long however should cover this need without increasing out internal data structure.