Add support for ext_pgs mbufs to nfsm_build().
This is the first of a series of commits that add support to the NFS client and server for building RPC messages in ext_pgs mbufs with anonymous pages. This is useful so that the entire mbuf list does not need to be copied before calling sosend() when NFS over TLS is enabled. Since ND_EXTPG is never set yet, there is no semantic change at this time.
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b0ee263dbd
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2da1527844
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=362903
@ -64,14 +64,27 @@ nfsm_build(struct nfsrv_descript *nd, int siz)
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void *retp;
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void *retp;
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struct mbuf *mb2;
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struct mbuf *mb2;
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if (siz > M_TRAILINGSPACE(nd->nd_mb)) {
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if ((nd->nd_flag & ND_EXTPG) == 0 &&
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siz > M_TRAILINGSPACE(nd->nd_mb)) {
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NFSMCLGET(mb2, M_NOWAIT);
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NFSMCLGET(mb2, M_NOWAIT);
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if (siz > MLEN)
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if (siz > MLEN)
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panic("build > MLEN");
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panic("build > MLEN");
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mb2->m_len = 0;
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mb2->m_len = 0;
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nd->nd_bpos = mtod(mb2, caddr_t);
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nd->nd_bpos = mtod(mb2, char *);
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nd->nd_mb->m_next = mb2;
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nd->nd_mb->m_next = mb2;
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nd->nd_mb = mb2;
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nd->nd_mb = mb2;
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} else if ((nd->nd_flag & ND_EXTPG) != 0) {
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if (siz > nd->nd_bextpgsiz) {
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mb2 = mb_alloc_ext_plus_pages(PAGE_SIZE, M_WAITOK);
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nd->nd_bpos = (char *)(void *)
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PHYS_TO_DMAP(mb2->m_epg_pa[0]);
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nd->nd_bextpg = 0;
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nd->nd_bextpgsiz = PAGE_SIZE - siz;
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nd->nd_mb->m_next = mb2;
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nd->nd_mb = mb2;
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} else
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nd->nd_bextpgsiz -= siz;
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nd->nd_mb->m_epg_last_len += siz;
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}
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}
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retp = (void *)(nd->nd_bpos);
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retp = (void *)(nd->nd_bpos);
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nd->nd_mb->m_len += siz;
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nd->nd_mb->m_len += siz;
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@ -109,8 +109,9 @@
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/ufsmount.h>
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#include <vm/uma.h>
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#include <vm/uma.h>
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#include <vm/vm.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_object.h>
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#include <vm/vm_param.h>
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#include <nfs/nfssvc.h>
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#include <nfs/nfssvc.h>
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#include "opt_nfs.h"
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#include "opt_nfs.h"
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#include "opt_ufs.h"
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#include "opt_ufs.h"
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