swap plugin: Be more sensitive about integer sizes in the *BSD code.

diff --git a/src/swap.c b/src/swap.c
index bcfe4a2..ca3b5ef 100644 (file)
--- a/src/swap.c
+++ b/src/swap.c
@@ -298,9 +298,9 @@ static int swap_read (void)
        }
 
 #if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
-# define C_SWAP_BLOCK_SIZE DEV_BSIZE
+# define C_SWAP_BLOCK_SIZE ((uint64_t) DEV_BSIZE)
 #else
-# define C_SWAP_BLOCK_SIZE 512
+# define C_SWAP_BLOCK_SIZE ((uint64_t) 512)
 #endif
 
        for (i = 0; i < swap_num; i++)
@@ -308,8 +308,18 @@ static int swap_read (void)
                if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
                        continue;
 
-               used  += swap_entries[i].se_inuse * C_SWAP_BLOCK_SIZE;
-               total += swap_entries[i].se_nblks * C_SWAP_BLOCK_SIZE;
+               used  += ((uint64_t) swap_entries[i].se_inuse)
+                       * C_SWAP_BLOCK_SIZE;
+               total += ((uint64_t) swap_entries[i].se_nblks)
+                       * C_SWAP_BLOCK_SIZE;
+       }
+
+       if (total < used)
+       {
+               ERROR ("swap plugin: Total swap space (%"PRIu64") "
+                               "is less than used swap space (%"PRIu64").",
+                               total, used);
+               return (-1);
        }
 
        swap_submit ("used", (gauge_t) used);