From 6f60a2b0a27a742690aa6acd5df1912ccb5fc8d3 Mon Sep 17 00:00:00 2001 From: Etienne Perot Date: Thu, 3 Dec 2020 06:18:03 -0800 Subject: Implement `fcntl` options `F_GETSIG` and `F_SETSIG`. These options allow overriding the signal that gets sent to the process when I/O operations are available on the file descriptor, rather than the default `SIGIO` signal. Doing so also populates `siginfo` to contain extra information about which file descriptor caused the event (`si_fd`) and what events happened on it (`si_band`). The logic around which FD is populated within `si_fd` matches Linux's, which means it has some weird edge cases where that value may not actually refer to a file descriptor that is still valid. This CL also ports extra S/R logic regarding async handler in VFS2. Without this, async I/O handlers aren't properly re-registered after S/R. PiperOrigin-RevId: 345436598 --- pkg/sentry/kernel/fasync/BUILD | 2 ++ 1 file changed, 2 insertions(+) (limited to 'pkg/sentry/kernel/fasync/BUILD') diff --git a/pkg/sentry/kernel/fasync/BUILD b/pkg/sentry/kernel/fasync/BUILD index 2b3955598..f855f038b 100644 --- a/pkg/sentry/kernel/fasync/BUILD +++ b/pkg/sentry/kernel/fasync/BUILD @@ -8,11 +8,13 @@ go_library( visibility = ["//:sandbox"], deps = [ "//pkg/abi/linux", + "//pkg/sentry/arch", "//pkg/sentry/fs", "//pkg/sentry/kernel", "//pkg/sentry/kernel/auth", "//pkg/sentry/vfs", "//pkg/sync", + "//pkg/syserror", "//pkg/waiter", ], ) -- cgit v1.2.3