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This makes it easy to detect proper anonymous inodes and to ensure that we can detect them in codepaths such as readahead(). Readahead on anonymous inodes didn't work because they didn't have a proper mode. Now that they have we need to retain EINVAL being returned otherwise LTP will fail. We also need to ensure that ioctls aren't simply fired like they are for regular files so things like inotify inodes continue to correctly call their own ioctl handlers as in [1]. Reported-by: Xilin Wu <sophon@radxa.com> Link: https://lore.kernel.org/3A9139D5CD543962+89831381-31b9-4392-87ec-a84a5b3507d8@radxa.com [1] Link: https://lore.kernel.org/7a1a7076-ff6b-4cb0-94e7-7218a0a44028@sirena.org.uk Signed-off-by: Christian Brauner <brauner@kernel.org> |
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