Add inotify events for extended attributes and splice.

Splice, setxattr and removexattr should generate events. Note that VFS2 already
generates events for extended attributes.

Updates #1479.

PiperOrigin-RevId: 314244261

1 files changed, 6 insertions, 0 deletions

diff --git a/pkg/sentry/syscalls/linux/sys_splice.go b/pkg/sentry/syscalls/linux/sys_splice.go
index 39f2b79ec..77c78889d 100644
--- a/pkg/sentry/syscalls/linux/sys_splice.go
+++ b/pkg/sentry/syscalls/linux/sys_splice.go
@@ -80,6 +80,12 @@ func doSplice(t *kernel.Task, outFile, inFile *fs.File, opts fs.SpliceOpts, nonB
 		}
 	}
 
+	if total > 0 {
+		// On Linux, inotify behavior is not very consistent with splice(2). We try
+		// our best to emulate Linux for very basic calls to splice, where for some
+		// reason, events are generated for output files, but not input files.
+		outFile.Dirent.InotifyEvent(linux.IN_MODIFY, 0)
+	}
 	return total, err
 }