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virtio-devices: Reset offset properly upon unmap for virtio-fs.

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We should reset the offset to 0, when asked to remove the whole dax
mapping.

Signed-off-by: Hao Xu <howeyxu@tencent.com>
This commit is contained in:
Hao Xu 2023-02-24 19:05:55 +08:00 committed by Bo Chen
parent 85962099c7
commit 74cd3d0dc2
1 changed files with 5 additions and 3 deletions
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8
virtio-devices/src/vhost_user/fs.rs
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@ -119,7 +119,6 @@ impl VhostUserMasterReqHandler for SlaveReqHandler {
debug!("fs_slave_unmap");
for i in 0..VHOST_USER_FS_SLAVE_ENTRIES {
let offset = fs.cache_offset[i];
let mut len = fs.len[i];
// Ignore if the length is 0.
@ -129,9 +128,12 @@ impl VhostUserMasterReqHandler for SlaveReqHandler {
// Need to handle a special case where the slave ask for the unmapping
// of the entire mapping.
if len == 0xffff_ffff_ffff_ffff {
let offset = if len == 0xffff_ffff_ffff_ffff {
len = self.cache_size;
}
0
} else {
fs.cache_offset[i]
};
if !self.is_req_valid(offset, len) {
return Err(io::Error::from_raw_os_error(libc::EINVAL));