LU-80 lov: large stripe count support

[fs/lustre-release.git] / lustre / include / lustre / lustre_idl.h

diff --git a/lustre/include/lustre/lustre_idl.h b/lustre/include/lustre/lustre_idl.h
index 732846c..f030e2b 100644 (file)
--- a/lustre/include/lustre/lustre_idl.h
+++ b/lustre/include/lustre/lustre_idl.h
@@ -1141,7 +1141,8 @@ extern void lustre_swab_ptlrpc_body(struct ptlrpc_body *pb);
                                 OBD_CONNECT_RMT_CLIENT_FORCE | OBD_CONNECT_VBR | \
                                 OBD_CONNECT_MDS | OBD_CONNECT_SKIP_ORPHAN | \
                                 OBD_CONNECT_GRANT_SHRINK | OBD_CONNECT_FULL20 | \
-                                OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES)
+                                OBD_CONNECT_64BITHASH | OBD_CONNECT_MAXBYTES | \
+                                OBD_CONNECT_MAX_EASIZE)
 #define ECHO_CONNECT_SUPPORTED (0)
 #define MGS_CONNECT_SUPPORTED  (OBD_CONNECT_VERSION | OBD_CONNECT_AT | \
                                 OBD_CONNECT_FULL20 | OBD_CONNECT_IMP_RECOV)
@@ -2130,7 +2131,17 @@ enum seq_op {
 
 #define LOV_MIN_STRIPE_BITS 16   /* maximum PAGE_SIZE (ia64), power of 2 */
 #define LOV_MIN_STRIPE_SIZE (1<<LOV_MIN_STRIPE_BITS)
-#define LOV_MAX_STRIPE_COUNT  160   /* until bug 4424 is fixed */
+#define LOV_MAX_STRIPE_COUNT_OLD 160
+/* This calculation is crafted so that input of 4096 will result in 160
+ * which in turn is equal to old maximal stripe count.
+ * XXX: In fact this is too simpified for now, what it also need is to get
+ * ea_type argument to clearly know how much space each stripe consumes.
+ *
+ * The limit of 12 pages is somewhat arbitrary, but is a reasonably large
+ * allocation that is sufficient for the current generation of systems.
+ *
+ * (max buffer size - lov+rpc header) / sizeof(struct lov_ost_data_v1) */
+#define LOV_MAX_STRIPE_COUNT 2000  /* ((12 * 4096 - 256) / 24) */
 #define LOV_V1_INSANE_STRIPE_COUNT 65532 /* maximum stripe count bz13933 */
 
 #define LOV_MAX_UUID_BUFFER_SIZE  8192