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vmm: fix UFFDIO_WAKE and UFFD_FEATURE_MISSING_HUGETLBFS

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UFFDIO_WAKE was 0x4010_aa02 (_IOW) but should be 0x8010_aa02,
causing every wake call to silently fail with -EINVAL.

UFFD_FEATURE_MISSING_HUGETLBFS was (1<<6) but should be (1<<4),
colliding with UFFD_FEATURE_EVENT_UNMAP.

Signed-off-by: Zhiheng Tao <junchuan.tzh@antgroup.com>
This commit is contained in:
Zhiheng Tao
2026-04-14 14:12:59 +08:00
committed by Rob Bradford
parent d54a7d27a1
commit df58e814eb
1 changed files with 2 additions and 2 deletions
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4
vmm/src/userfaultfd.rs
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@@ -6,7 +6,7 @@
pub const UFFDIO_API: u64 = 0xc018_aa3f; // _IOWR(0xAA, 0x3F, struct uffdio_api)
pub const UFFDIO_REGISTER: u64 = 0xc020_aa00; // _IOWR(0xAA, 0x00, struct uffdio_register)
pub const UFFDIO_COPY: u64 = 0xc028_aa03; // _IOWR(0xAA, 0x03, struct uffdio_copy)
pub const UFFDIO_WAKE: u64 = 0x4010_aa02; // _IOW(0xAA, 0x02, struct uffdio_range)
pub const UFFDIO_WAKE: u64 = 0x8010_aa02; // _IOR(0xAA, 0x02, struct uffdio_range)
// Seccomp compares these as Dword (u32); ensure they fit.
const _: () = assert!(UFFDIO_API <= u32::MAX as u64);
@@ -17,8 +17,8 @@ const _: () = assert!(UFFDIO_WAKE <= u32::MAX as u64);
pub const UFFD_API: u64 = 0xAA;
pub const UFFDIO_REGISTER_MODE_MISSING: u64 = 1;
pub const UFFD_EVENT_PAGEFAULT: u8 = 0x12;
pub const UFFD_FEATURE_MISSING_HUGETLBFS: u64 = 1 << 4;
pub const UFFD_FEATURE_MISSING_SHMEM: u64 = 1 << 5;
pub const UFFD_FEATURE_MISSING_HUGETLBFS: u64 = 1 << 6;
const _UFFDIO_COPY: u64 = 0x03;
const _UFFDIO_WAKE: u64 = 0x02;