LU-13004 ptlrpc: Allow BULK_BUF_KIOV to accept a kvec

[fs/lustre-release.git] / lustre / ptlrpc / pers.c

diff --git a/lustre/ptlrpc/pers.c b/lustre/ptlrpc/pers.c
index 5c78e12..e899d79 100644 (file)
--- a/lustre/ptlrpc/pers.c
+++ b/lustre/ptlrpc/pers.c
@@ -15,17 +15,15 @@
  *
  * You should have received a copy of the GNU General Public License
  * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
  *
  * GPL HEADER END
  */
 /*
  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2015, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -33,11 +31,6 @@
  */
 
 #define DEBUG_SUBSYSTEM S_RPC
-#ifndef __KERNEL__
-#include <errno.h>
-#include <signal.h>
-#include <liblustre.h>
-#endif
 
 #include <obd_support.h>
 #include <obd_class.h>
@@ -47,75 +40,35 @@
 
 #include "ptlrpc_internal.h"
 
-#ifdef __KERNEL__
-
-void ptlrpc_fill_bulk_md (lnet_md_t *md, struct ptlrpc_bulk_desc *desc)
-{
-        LASSERT (desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
-        LASSERT (!(md->options & (LNET_MD_IOVEC | LNET_MD_KIOV | LNET_MD_PHYS)));
-
-        md->options |= LNET_MD_KIOV;
-        md->length = desc->bd_iov_count;
-        if (desc->bd_enc_iov)
-                md->start = desc->bd_enc_iov;
-        else
-                md->start = desc->bd_iov;
-}
-
-void ptlrpc_add_bulk_page(struct ptlrpc_bulk_desc *desc, cfs_page_t *page,
-                          int pageoffset, int len)
-{
-        lnet_kiov_t *kiov = &desc->bd_iov[desc->bd_iov_count];
-
-        kiov->kiov_page = page;
-        kiov->kiov_offset = pageoffset;
-        kiov->kiov_len = len;
-
-        desc->bd_iov_count++;
-}
-
-#else /* !__KERNEL__ */
-
-void ptlrpc_fill_bulk_md(lnet_md_t *md, struct ptlrpc_bulk_desc *desc)
-{
-        LASSERT (!(md->options & (LNET_MD_IOVEC | LNET_MD_KIOV | LNET_MD_PHYS)));
-        if (desc->bd_iov_count == 1) {
-                md->start = desc->bd_iov[0].iov_base;
-                md->length = desc->bd_iov[0].iov_len;
-                return;
-        }
-
-        md->options |= LNET_MD_IOVEC;
-        md->start = &desc->bd_iov[0];
-        md->length = desc->bd_iov_count;
-}
 
-static int can_merge_iovs(lnet_md_iovec_t *existing, lnet_md_iovec_t *candidate)
+void ptlrpc_fill_bulk_md(struct lnet_md *md, struct ptlrpc_bulk_desc *desc,
+                        int mdidx)
 {
-        if (existing->iov_base + existing->iov_len == candidate->iov_base)
-                return 1;
-#if 0
-        /* Enable this section to provide earlier evidence of fragmented bulk */
-        CERROR("Can't merge iovs %p for %x, %p for %x\n",
-               existing->iov_base, existing->iov_len,
-               candidate->iov_base, candidate->iov_len);
-#endif
-        return 0;
+       BUILD_BUG_ON(PTLRPC_MAX_BRW_PAGES >= LI_POISON);
+
+       LASSERT(mdidx < desc->bd_md_max_brw);
+       LASSERT(desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
+       LASSERT(!(md->options & (LNET_MD_IOVEC | LNET_MD_KIOV |
+                                LNET_MD_PHYS)));
+
+       md->length = max(0, desc->bd_iov_count - mdidx * LNET_MAX_IOV);
+       md->length = min_t(unsigned int, LNET_MAX_IOV, md->length);
+
+       if (ptlrpc_is_bulk_desc_kiov(desc->bd_type)) {
+               md->options |= LNET_MD_KIOV;
+               if (GET_ENC_KIOV(desc))
+                       md->start = &BD_GET_ENC_KIOV(desc, mdidx *
+                                                    LNET_MAX_IOV);
+               else
+                       md->start = &BD_GET_KIOV(desc, mdidx * LNET_MAX_IOV);
+       } else if (ptlrpc_is_bulk_desc_kvec(desc->bd_type)) {
+               md->options |= LNET_MD_IOVEC;
+               if (GET_ENC_KVEC(desc))
+                       md->start = &BD_GET_ENC_KVEC(desc, mdidx *
+                                                     LNET_MAX_IOV);
+               else
+                       md->start = &BD_GET_KVEC(desc, mdidx * LNET_MAX_IOV);
+       }
 }
 
-void ptlrpc_add_bulk_page(struct ptlrpc_bulk_desc *desc, cfs_page_t *page,
-                          int pageoffset, int len)
-{
-        lnet_md_iovec_t *iov = &desc->bd_iov[desc->bd_iov_count];
-
-        iov->iov_base = page->addr + pageoffset;
-        iov->iov_len = len;
-
-        if (desc->bd_iov_count > 0 && can_merge_iovs(iov - 1, iov)) {
-                (iov - 1)->iov_len += len;
-        } else {
-                desc->bd_iov_count++;
-        }
-}
 
-#endif /* !__KERNEL__ */