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linux-dmabuf: intercept udmabuf buffers

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This commit is contained in:
Julian Orth 2025-10-01 17:34:24 +02:00
parent 0570669af2
commit 410281b13e
5 changed files with 131 additions and 32 deletions
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11
src/clientmem.rs
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@ -54,8 +54,9 @@ impl ClientMem {
read_only: bool,
client: Option<&Client>,
cpu: Option<&Rc<CpuWorker>>,
is_udmabuf: bool,
) -> Result<Self, ClientMemError> {
Self::new2(fd, len, read_only, client, cpu, c::MAP_SHARED)
Self::new2(fd, len, read_only, client, cpu, c::MAP_SHARED, is_udmabuf)
}
pub fn new_private(
@ -65,7 +66,7 @@ impl ClientMem {
client: Option<&Client>,
cpu: Option<&Rc<CpuWorker>>,
) -> Result<Self, ClientMemError> {
Self::new2(fd, len, read_only, client, cpu, c::MAP_PRIVATE)
Self::new2(fd, len, read_only, client, cpu, c::MAP_PRIVATE, false)
}
fn new2(
@ -75,10 +76,12 @@ impl ClientMem {
client: Option<&Client>,
cpu: Option<&Rc<CpuWorker>>,
flags: c::c_int,
is_udmabuf: bool,
) -> Result<Self, ClientMemError> {
let mut sigbus_impossible = false;
let mut sigbus_impossible = is_udmabuf;
let mut real_size = None;
if let Ok(seals) = uapi::fcntl_get_seals(fd.raw())
if !sigbus_impossible
&& let Ok(seals) = uapi::fcntl_get_seals(fd.raw())
&& seals & c::F_SEAL_SHRINK != 0
&& let Ok(stat) = uapi::fstat(fd.raw())
{