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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)
54 LASSERT (desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
55 LASSERT (!(md->options & (LNET_MD_IOVEC | LNET_MD_KIOV | LNET_MD_PHYS)));
57 md->options |= LNET_MD_KIOV;
58 md->length = desc->bd_iov_count;
60 md->start = desc->bd_enc_iov;
62 md->start = desc->bd_iov;
65 void ptlrpc_add_bulk_page(struct ptlrpc_bulk_desc *desc, cfs_page_t *page,
66 int pageoffset, int len)
68 lnet_kiov_t *kiov = &desc->bd_iov[desc->bd_iov_count];
70 kiov->kiov_page = page;
71 kiov->kiov_offset = pageoffset;
77 #else /* !__KERNEL__ */
79 void ptlrpc_fill_bulk_md(lnet_md_t *md, struct ptlrpc_bulk_desc *desc)
81 LASSERT (!(md->options & (LNET_MD_IOVEC | LNET_MD_KIOV | LNET_MD_PHYS)));
82 if (desc->bd_iov_count == 1) {
83 md->start = desc->bd_iov[0].iov_base;
84 md->length = desc->bd_iov[0].iov_len;
88 md->options |= LNET_MD_IOVEC;
89 md->start = &desc->bd_iov[0];
90 md->length = desc->bd_iov_count;
93 static int can_merge_iovs(lnet_md_iovec_t *existing, lnet_md_iovec_t *candidate)
95 if (existing->iov_base + existing->iov_len == candidate->iov_base)
98 /* Enable this section to provide earlier evidence of fragmented bulk */
99 CERROR("Can't merge iovs %p for %x, %p for %x\n",
100 existing->iov_base, existing->iov_len,
101 candidate->iov_base, candidate->iov_len);
106 void ptlrpc_add_bulk_page(struct ptlrpc_bulk_desc *desc, cfs_page_t *page,
107 int pageoffset, int len)
109 lnet_md_iovec_t *iov = &desc->bd_iov[desc->bd_iov_count];
111 iov->iov_base = page->addr + pageoffset;
114 if (desc->bd_iov_count > 0 && can_merge_iovs(iov - 1, iov)) {
115 (iov - 1)->iov_len += len;
117 desc->bd_iov_count++;
121 #endif /* !__KERNEL__ */