Added BNF for zpool

diff --git a/README b/README
index 4a61f1dd9620de5cead65148c67159954388a64f..cd2fd1c228afe5e77a4838eca62728a1a56d3bbc 100644 (file)
--- a/README
+++ b/README
@@ -6,3 +6,14 @@ Objects:
 - dataset
 - snapshot
 
+<zpool>                ::= <vdev> <log> <cache> <spare> | <vdev> <log> <cache> <spare> <zpool>;
+<vdev>         ::= <diskset> | <mirror> | <raidz1> | <raidz2> | <raidz3>;
+<mirror>       ::= "disk" "disk" | "disk" <mirror>;
+<raidz1>       ::= "disk" "disk" "disk" | "disk" <raidz1>;
+<raidz2>       ::= "disk" "disk" "disk" | "disk" <raidz2>;
+<raidz3>       ::= "disk" "disk" "disk" "disk" "disk" | "disk" <raidz3>;
+<log>          ::= "internal" | <diskset> | <mirror>;
+<cache>                ::=     "internal" | <diskset>;
+<spare>                ::= "" | <diskset>;
+<diskset>      ::= "disk" | "disk" <diskset>;
+