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sys_util: Add support for F_SEAL_FUTURE_WRITE.

Browse source 
BUG=b:210847494
TEST=cargo build

Change-Id: I8bb714cafba994afed42cbf0c9e6d9adee799dd9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3408094
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Allen Webb <allenwebb@google.com>
Auto-Submit: Allen Webb <allenwebb@google.com>
This commit is contained in:
Allen Webb 2022-01-21 16:21:18 -06:00 committed by Commit Bot
parent e79aba1026
commit da4bad999f
1 changed files with 17 additions and 5 deletions
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22
common/sys_util/src/shm.rs
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@ -9,8 +9,8 @@ use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
use libc::{
self, c_char, c_int, c_long, c_uint, close, fcntl, ftruncate64, off64_t, syscall,
SYS_memfd_create, EINVAL, F_ADD_SEALS, F_GET_SEALS, F_SEAL_GROW, F_SEAL_SEAL, F_SEAL_SHRINK,
F_SEAL_WRITE, MFD_ALLOW_SEALING,
SYS_memfd_create, EINVAL, F_ADD_SEALS, F_GET_SEALS, F_SEAL_FUTURE_WRITE, F_SEAL_GROW,
F_SEAL_SEAL, F_SEAL_SHRINK, F_SEAL_WRITE, MFD_ALLOW_SEALING,
};
use serde::{Deserialize, Serialize};
@ -50,7 +50,7 @@ impl MemfdSeals {
self.0
}
/// True of the grow seal bit is present.
/// True if the grow seal bit is present.
#[inline]
pub fn grow_seal(self) -> bool {
self.0 & F_SEAL_GROW != 0
@ -62,7 +62,7 @@ impl MemfdSeals {
self.0 |= F_SEAL_GROW;
}
/// True of the shrink seal bit is present.
/// True if the shrink seal bit is present.
#[inline]
pub fn shrink_seal(self) -> bool {
self.0 & F_SEAL_SHRINK != 0
@ -74,7 +74,7 @@ impl MemfdSeals {
self.0 |= F_SEAL_SHRINK;
}
/// True of the write seal bit is present.
/// True if the write seal bit is present.
#[inline]
pub fn write_seal(self) -> bool {
self.0 & F_SEAL_WRITE != 0
@ -86,6 +86,18 @@ impl MemfdSeals {
self.0 |= F_SEAL_WRITE;
}
/// True if the future write seal bit is present.
#[inline]
pub fn future_write_seal(self) -> bool {
self.0 & F_SEAL_FUTURE_WRITE != 0
}
/// Sets the future write seal bit.
#[inline]
pub fn set_future_write_seal(&mut self) {
self.0 |= F_SEAL_FUTURE_WRITE;
}
/// True of the seal seal bit is present.
#[inline]
pub fn seal_seal(self) -> bool {