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authorMiklos Szeredi <mszeredi@redhat.com>2022-09-24 06:59:59 +0200
committerMiklos Szeredi <mszeredi@redhat.com>2022-09-24 06:59:59 +0200
commit22873deac9e7b273bbf17eee515c8170510d861a (patch)
tree362bd3fb8b3b0fef76918d9eddbca1c9fe328e34 /net/Kconfig
parent521a547ced6477c54b4b0cc206000406c221b4d6 (diff)
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vfs: add vfs_tmpfile_open() helper
This helper unifies tmpfile creation with opening. Existing vfs_tmpfile() callers outside of fs/namei.c will be converted to using this helper. There are two such callers: cachefile and overlayfs. The cachefiles code currently uses the open_with_fake_path() helper to open the tmpfile, presumably to disable accounting of the open file. Overlayfs uses tmpfile for copy_up, which means these struct file instances will be short lived, hence it doesn't really matter if they are accounted or not. Disable accounting in this helper too, which should be okay for both callers. Add MAY_OPEN permission checking for consistency. Like for create(2) read/write permissions are not checked. Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
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