agent: fix failing unit tests on ppc64le

- test_volume_capacity_stats : verify the file block size against the fetched size via statfs()
- test_reseed_rng: Correct the request codes for RNDADDTOENTCNT and RNDRESEEDCRNG when platform is ppc64le

Signed-off-by: Amulyam24 <[email protected]>

src/agent/src/random.rs

@@ -12,7 +12,13 @@ use std::os::unix::io::{AsRawFd, FromRawFd};
 use tracing::instrument;
 
 pub const RNGDEV: &str = "/dev/random";
+#[cfg(target_arch = "powerpc64")]
+pub const RNDADDTOENTCNT: libc::c_uint = 0x80045201;
+#[cfg(target_arch = "powerpc64")]
+pub const RNDRESEEDCRNG: libc::c_int = 0x20005207;
+#[cfg(not(target_arch = "powerpc64"))]
 pub const RNDADDTOENTCNT: libc::c_int = 0x40045201;
+#[cfg(not(target_arch = "powerpc64"))]
 pub const RNDRESEEDCRNG: libc::c_int = 0x5207;
 
 // Handle the differing ioctl(2) request types for different targets

src/agent/src/rpc.rs

@@ -2694,8 +2694,16 @@ OtherField:other
         fs::write(mount_dir.path().join("file.dat"), "foobar").unwrap();
         stats = get_volume_capacity_stats(mount_dir.path().to_str().unwrap()).unwrap();
 
-        assert_eq!(stats.used, 4 * 1024);
-        assert_eq!(stats.available, available - 4 * 1024);
+        let size = get_block_size(mount_dir.path().to_str().unwrap()).unwrap();
+
+        assert_eq!(stats.used, size);
+        assert_eq!(stats.available, available - size);
+    }
+
+    fn get_block_size(path: &str) -> Result<u64, Errno> {
+        let stat = statfs::statfs(path)?;
+        let block_size = stat.block_size() as u64;
+        Ok(block_size)
     }
 
     #[tokio::test]