b=306

missed a new file from b_lov

diff --git a/lustre/lov/lov_pack.c b/lustre/lov/lov_pack.c
new file mode 100644 (file)
index 0000000..d28a6c9
--- /dev/null
+++ b/lustre/lov/lov_pack.c
@@ -0,0 +1,176 @@
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ *  Copyright (C) 2002 Cluster File Systems, Inc. <adilger@clusterfs.com>
+ *
+ *   This file is part of Lustre, http://www.lustre.org.
+ *
+ *   Lustre is free software; you can redistribute it and/or
+ *   modify it under the terms of version 2 of the GNU General Public
+ *   License as published by the Free Software Foundation.
+ *
+ *   Lustre is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Lustre; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * (Un)packing of OST/MDS requests
+ *
+ */
+
+#define DEBUG_SUBSYSTEM S_LLITE
+
+#include <linux/lustre_net.h>
+#include <linux/obd.h>
+#include <linux/obd_lov.h>
+#include <linux/obd_support.h>
+
+/* lov_packdesc() is in mds/mds_lov.c */
+
+void lov_unpackdesc(struct lov_desc *ld)
+{
+        ld->ld_tgt_count = NTOH__u32(ld->ld_tgt_count);
+        ld->ld_default_stripe_count = HTON__u32(ld->ld_default_stripe_count);
+        ld->ld_default_stripe_size = HTON__u32(ld->ld_default_stripe_size);
+        ld->ld_pattern = HTON__u32(ld->ld_pattern);
+}
+
+/* Pack LOV object metadata for shipment to the MDS.
+ *
+ * XXX In the future, this will be enhanced to get the EA size from the
+ *     underlying OSC device(s) to get their EA sizes so we can stack
+ *     LOVs properly.  For now lov_mds_md_size() just assumes one obd_id
+ *     per stripe.
+ */
+int lov_packmd(struct lustre_handle *conn, struct lov_mds_md **lmmp,
+               struct lov_stripe_md *lsm)
+{
+        struct obd_device *obd = class_conn2obd(conn);
+        struct lov_obd *lov = &obd->u.lov;
+        struct lov_oinfo *loi;
+        struct lov_mds_md *lmm;
+        int ost_count = lov->desc.ld_tgt_count;
+        int stripe_count = ost_count;
+        int lmm_size;
+        int i;
+        ENTRY;
+
+        if (lsm)
+                stripe_count = lsm->lsm_stripe_count;
+
+        /* XXX LOV STACKING call into osc for sizes */
+        lmm_size = lov_mds_md_size(ost_count);
+
+        if (!lmmp)
+                RETURN(lmm_size);
+
+        if (*lmmp && !lsm) {
+                /* endianness */
+                ost_count = ((*lmmp)->lmm_ost_count);
+                OBD_FREE(*lmmp, lov_mds_md_size(ost_count));
+                *lmmp = NULL;
+                RETURN(0);
+        }
+
+        if (!*lmmp) {
+                OBD_ALLOC(*lmmp, lmm_size);
+                if (!*lmmp)
+                        RETURN(-ENOMEM);
+        }
+
+        lmm = *lmmp;
+
+        lmm->lmm_stripe_count = (stripe_count);
+        if (!lsm)
+                RETURN(lmm_size);
+        /* XXX endianness */
+        lmm->lmm_magic = (lsm->lsm_magic);
+        lmm->lmm_object_id = (lsm->lsm_object_id);
+        lmm->lmm_stripe_size = (lsm->lsm_stripe_size);
+        lmm->lmm_stripe_pattern = (lsm->lsm_stripe_pattern);
+        lmm->lmm_stripe_offset = (lsm->lsm_stripe_offset);
+        lmm->lmm_ost_count = (lov->desc.ld_tgt_count);
+
+        /* Only fill in the object ids which we are actually using.
+         * Assumes lmm_objects is otherwise zero-filled. */
+        for (i = 0, loi = lsm->lsm_oinfo; i < stripe_count; i++, loi++)
+                /* XXX call down to osc_packmd() to do the packing */
+                lmm->lmm_objects[loi->loi_ost_idx].l_object_id = (loi->loi_id);
+
+        RETURN(lmm_size);
+}
+
+int lov_unpackmd(struct lustre_handle *conn, struct lov_stripe_md **lsmp,
+                 struct lov_mds_md *lmm)
+{
+        struct obd_device *obd = class_conn2obd(conn);
+        struct lov_obd *lov = &obd->u.lov;
+        struct lov_stripe_md *lsm;
+        struct lov_oinfo *loi;
+        int ost_count = lov->desc.ld_active_tgt_count;
+        int ost_offset = 0;
+        int stripe_count = 0;
+        int lsm_size;
+        int i;
+        ENTRY;
+
+        if (lmm)
+                /* endianness */
+                stripe_count = (lmm->lmm_stripe_count);
+
+        if (!stripe_count)
+                stripe_count = lov->desc.ld_default_stripe_count;
+        if (!stripe_count || stripe_count > ost_count)
+                stripe_count = ost_count;
+
+        /* XXX LOV STACKING call into osc for sizes */
+        lsm_size = lov_stripe_md_size(stripe_count);
+
+        if (!lsmp)
+                RETURN(lsm_size);
+
+        if (*lsmp && !lmm) {
+                stripe_count = (*lsmp)->lsm_stripe_count;
+                OBD_FREE(*lsmp, lov_stripe_md_size(stripe_count));
+                *lsmp = NULL;
+                RETURN(0);
+        }
+
+        if (!*lsmp) {
+                OBD_ALLOC(*lsmp, lsm_size);
+                if (!*lsmp)
+                        RETURN(-ENOMEM);
+        }
+
+        lsm = *lsmp;
+
+        lsm->lsm_stripe_count = stripe_count;
+        if (!lmm)
+                RETURN(lsm_size);
+
+        /* XXX endianness */
+        ost_offset = lsm->lsm_stripe_offset = (lmm->lmm_stripe_offset);
+        lsm->lsm_magic = (lmm->lmm_magic);
+        lsm->lsm_object_id = (lmm->lmm_object_id);
+        lsm->lsm_stripe_size = (lmm->lmm_stripe_size);
+        lsm->lsm_stripe_pattern = (lmm->lmm_stripe_pattern);
+
+        for (i = 0, loi = lsm->lsm_oinfo; i < ost_count; i++, ost_offset++) {
+                ost_offset %= ost_count;
+
+                if (!lmm->lmm_objects[ost_offset].l_object_id)
+                        continue;
+
+                LASSERT(loi - lsm->lsm_oinfo < stripe_count);
+                /* XXX LOV STACKING call down to osc_unpackmd() */
+                loi->loi_id = (lmm->lmm_objects[ost_offset].l_object_id);
+                loi->loi_ost_idx = ost_offset;
+                loi++;
+        }
+
+        RETURN(lsm_size);
+}