* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2013, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
lnet_md_free(md);
}
+struct page *
+lnet_kvaddr_to_page(unsigned long vaddr)
+{
+ if (is_vmalloc_addr((void *)vaddr))
+ return vmalloc_to_page((void *)vaddr);
+
+#ifdef CONFIG_HIGHMEM
+
+#ifdef HAVE_KMAP_TO_PAGE
+ /*
+ * This ifdef is added to handle the kernel versions
+ * which have kmap_to_page() function exported. If so,
+ * we should use it. Otherwise, remain with the legacy check.
+ */
+ return kmap_to_page((void *)vaddr);
+#else
+
+ if (vaddr >= PKMAP_ADDR(0) && vaddr < PKMAP_ADDR(LAST_PKMAP)) {
+ /* No highmem pages only used for bulk (kiov) I/O */
+ CERROR("find page for address in highmem\n");
+ LBUG();
+ }
+ return virt_to_page(vaddr);
+#endif /* HAVE_KMAP_TO_PAGE */
+#else
+
+ return virt_to_page(vaddr);
+#endif /* CONFIG_HIGHMEM */
+}
+EXPORT_SYMBOL(lnet_kvaddr_to_page);
+
int
-lnet_cpt_of_md(struct lnet_libmd *md)
+lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset)
{
int cpt = CFS_CPT_ANY;
+ unsigned int niov;
- if (!md)
- return CFS_CPT_ANY;
-
- if ((md->md_options & LNET_MD_BULK_HANDLE) != 0 &&
- !LNetMDHandleIsInvalid(md->md_bulk_handle)) {
+ /*
+ * if the md_options has a bulk handle then we want to look at the
+ * bulk md because that's the data which we will be DMAing
+ */
+ if (md && (md->md_options & LNET_MD_BULK_HANDLE) != 0 &&
+ !LNetMDHandleIsInvalid(md->md_bulk_handle))
md = lnet_handle2md(&md->md_bulk_handle);
- if (!md)
- return CFS_CPT_ANY;
- }
+ if (!md || md->md_niov == 0)
+ return CFS_CPT_ANY;
+ niov = md->md_niov;
+
+ /*
+ * There are three cases to handle:
+ * 1. The MD is using lnet_kiov_t
+ * 2. The MD is using struct kvec
+ * 3. Contiguous buffer allocated via vmalloc
+ *
+ * in case 2 we can use virt_to_page() macro to get the page
+ * address of the memory kvec describes.
+ *
+ * in case 3 use is_vmalloc_addr() and vmalloc_to_page()
+ *
+ * The offset provided can be within the first iov/kiov entry or
+ * it could go beyond it. In that case we need to make sure to
+ * look at the page which actually contains the data that will be
+ * DMAed.
+ */
if ((md->md_options & LNET_MD_KIOV) != 0) {
- if (md->md_iov.kiov[0].kiov_page != NULL)
- cpt = cfs_cpt_of_node(lnet_cpt_table(),
- page_to_nid(md->md_iov.kiov[0].kiov_page));
- } else if (md->md_iov.iov[0].iov_base != NULL) {
+ lnet_kiov_t *kiov = md->md_iov.kiov;
+
+ while (offset >= kiov->kiov_len) {
+ offset -= kiov->kiov_len;
+ niov--;
+ kiov++;
+ if (niov == 0) {
+ CERROR("offset %d goes beyond kiov\n", offset);
+ goto out;
+ }
+ }
+
cpt = cfs_cpt_of_node(lnet_cpt_table(),
- page_to_nid(virt_to_page(md->md_iov.iov[0].iov_base)));
+ page_to_nid(kiov->kiov_page));
+ } else {
+ struct kvec *iov = md->md_iov.iov;
+ unsigned long vaddr;
+ struct page *page;
+
+ while (offset >= iov->iov_len) {
+ offset -= iov->iov_len;
+ niov--;
+ iov++;
+ if (niov == 0) {
+ CERROR("offset %d goes beyond iov\n", offset);
+ goto out;
+ }
+ }
+
+ vaddr = ((unsigned long)iov->iov_base) + offset;
+ page = lnet_kvaddr_to_page(vaddr);
+ if (!page) {
+ CERROR("Couldn't resolve vaddr 0x%lx to page\n", vaddr);
+ goto out;
+ }
+ cpt = cfs_cpt_of_node(lnet_cpt_table(), page_to_nid(page));
}
+out:
return cpt;
}
/* must be called with resource lock held */
static int
-lnet_md_link(struct lnet_libmd *md, struct lnet_handle_eq eq_handle, int cpt)
+lnet_md_link(struct lnet_libmd *md, struct lnet_eq *eq, int cpt)
{
struct lnet_res_container *container = the_lnet.ln_md_containers[cpt];
* maybe there we shouldn't even allow LNET_EQ_NONE!)
* LASSERT (eq == NULL);
*/
- if (!LNetEQHandleIsInvalid(eq_handle)) {
- md->md_eq = lnet_handle2eq(&eq_handle);
-
- if (md->md_eq == NULL)
- return -ENOENT;
-
+ if (eq) {
+ md->md_eq = eq;
(*md->md_eq->eq_refs[cpt])++;
}
umd->max_size = lmd->md_max_size;
umd->options = lmd->md_options;
umd->user_ptr = lmd->md_user_ptr;
- lnet_eq2handle(&umd->eq_handle, lmd->md_eq);
}
static int
/**
* Create a memory descriptor and attach it to a ME
*
- * \param meh A handle for a ME to associate the new MD with.
+ * \param me An ME to associate the new MD with.
* \param umd Provides initial values for the user-visible parts of a MD.
* Other than its use for initialization, there is no linkage between this
* structure and the MD maintained by the LNet.
* a MD.
*/
int
-LNetMDAttach(struct lnet_handle_me meh, struct lnet_md umd,
+LNetMDAttach(struct lnet_me *me, struct lnet_md umd,
enum lnet_unlink unlink, struct lnet_handle_md *handle)
{
- struct list_head matches = LIST_HEAD_INIT(matches);
- struct list_head drops = LIST_HEAD_INIT(drops);
- struct lnet_me *me;
+ LIST_HEAD(matches);
+ LIST_HEAD(drops);
struct lnet_libmd *md;
int cpt;
int rc;
if (rc != 0)
goto out_free;
- cpt = lnet_cpt_of_cookie(meh.cookie);
+ cpt = me->me_cpt;
lnet_res_lock(cpt);
- me = lnet_handle2me(&meh);
- if (me == NULL)
- rc = -ENOENT;
- else if (me->me_md != NULL)
+ if (me->me_md)
rc = -EBUSY;
else
rc = lnet_md_link(md, umd.eq_handle, cpt);
if (rc != 0)
goto out_free;
+ if (md->md_length > LNET_MTU) {
+ CERROR("Invalid length: too big transfer size %u, %d max\n",
+ md->md_length, LNET_MTU);
+ rc = -EINVAL;
+ goto out_free;
+ }
+
cpt = lnet_res_lock_current();
rc = lnet_md_link(md, umd.eq_handle, cpt);
lnet_eq_enqueue_event(md->md_eq, &ev);
}
+ if (md->md_rspt_ptr != NULL)
+ lnet_detach_rsp_tracker(md, cpt);
+
lnet_md_unlink(md);
lnet_res_unlock(cpt);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff