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35 #define DEBUG_SUBSYSTEM S_RPC
39 #include <liblustre.h>
42 #include <obd_support.h>
43 #include <obd_class.h>
44 #include <lustre_lib.h>
45 #include <lustre_ha.h>
46 #include <lustre_import.h>
48 #include "ptlrpc_internal.h"
52 void ptlrpc_fill_bulk_md(lnet_md_t *md, struct ptlrpc_bulk_desc *desc,
55 CLASSERT(PTLRPC_MAX_BRW_PAGES < LI_POISON);
57 LASSERT(mdidx < desc->bd_md_max_brw);
58 LASSERT(desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
59 LASSERT(!(md->options & (LNET_MD_IOVEC | LNET_MD_KIOV |
62 md->options |= LNET_MD_KIOV;
63 md->length = max(0, desc->bd_iov_count - mdidx * LNET_MAX_IOV);
64 md->length = min_t(unsigned int, LNET_MAX_IOV, md->length);
66 md->start = &desc->bd_enc_iov[mdidx * LNET_MAX_IOV];
68 md->start = &desc->bd_iov[mdidx * LNET_MAX_IOV];
71 void ptlrpc_add_bulk_page(struct ptlrpc_bulk_desc *desc, struct page *page,
72 int pageoffset, int len)
74 lnet_kiov_t *kiov = &desc->bd_iov[desc->bd_iov_count];
76 kiov->kiov_page = page;
77 kiov->kiov_offset = pageoffset;
83 #else /* !__KERNEL__ */
85 void ptlrpc_fill_bulk_md(lnet_md_t *md, struct ptlrpc_bulk_desc *desc,
88 LASSERT(mdidx < desc->bd_md_max_brw);
89 LASSERT(desc->bd_iov_count > mdidx * LNET_MAX_IOV);
90 LASSERT(!(md->options & (LNET_MD_IOVEC | LNET_MD_KIOV | LNET_MD_PHYS)));
92 if (desc->bd_iov_count == 1) {
93 md->start = desc->bd_iov[0].iov_base;
94 md->length = desc->bd_iov[0].iov_len;
98 md->options |= LNET_MD_IOVEC;
99 md->start = &desc->bd_iov[mdidx * LNET_MAX_IOV];
100 md->length = min(LNET_MAX_IOV, desc->bd_iov_count - mdidx *
104 static int can_merge_iovs(lnet_md_iovec_t *existing, lnet_md_iovec_t *candidate)
106 if (existing->iov_base + existing->iov_len == candidate->iov_base)
109 /* Enable this section to provide earlier evidence of fragmented bulk */
110 CERROR("Can't merge iovs %p for %x, %p for %x\n",
111 existing->iov_base, existing->iov_len,
112 candidate->iov_base, candidate->iov_len);
117 void ptlrpc_add_bulk_page(struct ptlrpc_bulk_desc *desc, struct page *page,
118 int pageoffset, int len)
120 lnet_md_iovec_t *iov = &desc->bd_iov[desc->bd_iov_count];
122 iov->iov_base = page->addr + pageoffset;
125 if (desc->bd_iov_count > 0 && can_merge_iovs(iov - 1, iov)) {
126 (iov - 1)->iov_len += len;
128 desc->bd_iov_count++;
132 #endif /* !__KERNEL__ */