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agent: Handle uevent remove actions

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uevents with action=remove was ignored causing the agent to reuse stale
data in the device map. This patch adds handling of such uevents.

Fixes #2405

Signed-off-by: Haitao Li <lihaitao@gmail.com>
This commit is contained in:
Haitao Li 2021-10-24 13:26:14 +11:00
parent 03877f3479
commit a13e2f77b8
2 changed files with 9 additions and 0 deletions
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1
src/agent/src/linux_abi.rs
View File

@ -94,6 +94,7 @@ pub const SYSTEM_DEV_PATH: &str = "/dev";
// Linux UEvent related consts.
pub const U_EVENT_ACTION: &str = "ACTION";
pub const U_EVENT_ACTION_ADD: &str = "add";
pub const U_EVENT_ACTION_REMOVE: &str = "remove";
pub const U_EVENT_DEV_PATH: &str = "DEVPATH";
pub const U_EVENT_SUB_SYSTEM: &str = "SUBSYSTEM";
pub const U_EVENT_SEQ_NUM: &str = "SEQNUM";

8
src/agent/src/uevent.rs
View File

@ -97,10 +97,18 @@ impl Uevent {
})
}
#[instrument]
async fn process_remove(&self, logger: &Logger, sandbox: &Arc<Mutex<Sandbox>>) {
let mut sb = sandbox.lock().await;
sb.uevent_map.remove(&self.devpath);
}
#[instrument]
async fn process(&self, logger: &Logger, sandbox: &Arc<Mutex<Sandbox>>) {
if self.action == U_EVENT_ACTION_ADD {
return self.process_add(logger, sandbox).await;
} else if self.action == U_EVENT_ACTION_REMOVE {
return self.process_remove(logger, sandbox).await;
}
debug!(*logger, "ignoring event"; "uevent" => format!("{:?}", self));
}