/* $NetBSD: nfsm_subs.h,v 1.7 1995/12/19 23:08:00 cgd Exp $ */ /* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Rick Macklem at The University of Guelph. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)nfsm_subs.h 8.1 (Berkeley) 6/16/93 */ /* * These macros do strange and peculiar things to mbuf chains for * the assistance of the nfs code. To attempt to use them for any * other purpose will be dangerous. (they make weird assumptions) */ /* * First define what the actual subs. return */ extern struct mbuf *nfsm_reqh(); #define M_HASCL(m) ((m)->m_flags & M_EXT) #define NFSMINOFF(m) \ if (M_HASCL(m)) \ (m)->m_data = (m)->m_ext.ext_buf; \ else if ((m)->m_flags & M_PKTHDR) \ (m)->m_data = (m)->m_pktdat; \ else \ (m)->m_data = (m)->m_dat #define NFSMADV(m, s) (m)->m_data += (s) #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \ (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN)) /* * Now for the macros that do the simple stuff and call the functions * for the hard stuff. * These macros use several vars. declared in nfsm_reqhead and these * vars. must not be used elsewhere unless you are careful not to corrupt * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries * that may be used so long as the value is not expected to retained * after a macro. * I know, this is kind of dorkey, but it makes the actual op functions * fairly clean and deals with the mess caused by the xdr discriminating * unions. */ #define nfsm_build(a,c,s) \ { if ((s) > M_TRAILINGSPACE(mb)) { \ MGET(mb2, M_WAIT, MT_DATA); \ if ((s) > MLEN) \ panic("build > MLEN"); \ mb->m_next = mb2; \ mb = mb2; \ mb->m_len = 0; \ bpos = mtod(mb, caddr_t); \ } \ (a) = (c)(bpos); \ mb->m_len += (s); \ bpos += (s); } #define nfsm_dissect(a,c,s) \ { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ if (t1 >= (s)) { \ (a) = (c)(dpos); \ dpos += (s); \ } else if (error = nfsm_disct(&md, &dpos, (s), t1, &cp2)) { \ m_freem(mrep); \ goto nfsmout; \ } else { \ (a) = (c)cp2; \ } } #define nfsm_fhtom(v) \ nfsm_build(cp,caddr_t,NFSX_FH); \ bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH) #define nfsm_srvfhtom(f) \ nfsm_build(cp,caddr_t,NFSX_FH); \ bcopy((caddr_t)(f), cp, NFSX_FH) #define nfsm_mtofh(d,v) \ { struct nfsnode *np; nfsv2fh_t *fhp; \ nfsm_dissect(fhp,nfsv2fh_t *,NFSX_FH); \ if (error = nfs_nget((d)->v_mount, fhp, &np)) { \ m_freem(mrep); \ goto nfsmout; \ } \ (v) = NFSTOV(np); \ nfsm_loadattr(v, (struct vattr *)0); \ } #define nfsm_loadattr(v,a) \ { struct vnode *tvp = (v); \ if (error = nfs_loadattrcache(&tvp, &md, &dpos, (a))) { \ m_freem(mrep); \ goto nfsmout; \ } \ (v) = tvp; } #define nfsm_strsiz(s,m) \ { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ m_freem(mrep); \ error = EBADRPC; \ goto nfsmout; \ } } #define nfsm_srvstrsiz(s,m) \ { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ error = EBADRPC; \ nfsm_reply(0); \ } } #define nfsm_mtouio(p,s) \ if ((s) > 0 && \ (error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \ m_freem(mrep); \ goto nfsmout; \ } #define nfsm_uiotom(p,s) \ if (error = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \ m_freem(mreq); \ goto nfsmout; \ } #define nfsm_reqhead(v,a,s) \ mb = mreq = nfsm_reqh((v),(a),(s),&bpos) #define nfsm_reqdone m_freem(mrep); \ nfsmout: #define nfsm_rndup(a) (((a)+3)&(~0x3)) #define nfsm_request(v, t, p, c) \ if (error = nfs_request((v), mreq, (t), (p), \ (c), &mrep, &md, &dpos)) \ goto nfsmout #define nfsm_strtom(a,s,m) \ if ((s) > (m)) { \ m_freem(mreq); \ error = ENAMETOOLONG; \ goto nfsmout; \ } \ t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ if (t2 <= M_TRAILINGSPACE(mb)) { \ nfsm_build(tl,u_int32_t *,t2); \ *tl++ = txdr_unsigned(s); \ *(tl+((t2>>2)-2)) = 0; \ bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ } else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \ m_freem(mreq); \ goto nfsmout; \ } #define nfsm_srvdone \ nfsmout: \ return(error) #define nfsm_reply(s) \ { \ nfsd->nd_repstat = error; \ if (error) \ (void) nfs_rephead(0, nfsd, error, cache, &frev, \ mrq, &mb, &bpos); \ else \ (void) nfs_rephead((s), nfsd, error, cache, &frev, \ mrq, &mb, &bpos); \ m_freem(mrep); \ mreq = *mrq; \ if (error) \ return(0); \ } #define nfsm_adv(s) \ t1 = mtod(md, caddr_t)+md->m_len-dpos; \ if (t1 >= (s)) { \ dpos += (s); \ } else if (error = nfs_adv(&md, &dpos, (s), t1)) { \ m_freem(mrep); \ goto nfsmout; \ } #define nfsm_srvmtofh(f) \ nfsm_dissect(tl, u_int32_t *, NFSX_FH); \ bcopy((caddr_t)tl, (caddr_t)f, NFSX_FH) #define nfsm_clget \ if (bp >= be) { \ if (mp == mb) \ mp->m_len += bp-bpos; \ MGET(mp, M_WAIT, MT_DATA); \ MCLGET(mp, M_WAIT); \ mp->m_len = NFSMSIZ(mp); \ mp2->m_next = mp; \ mp2 = mp; \ bp = mtod(mp, caddr_t); \ be = bp+mp->m_len; \ } \ tl = (u_int32_t *)bp #define nfsm_srvfillattr \ fp->fa_type = vtonfs_type(va.va_type); \ fp->fa_mode = vtonfs_mode(va.va_type, va.va_mode); \ fp->fa_nlink = txdr_unsigned(va.va_nlink); \ fp->fa_uid = txdr_unsigned(va.va_uid); \ fp->fa_gid = txdr_unsigned(va.va_gid); \ if (nfsd->nd_nqlflag == NQL_NOVAL) { \ fp->fa_nfsblocksize = txdr_unsigned(va.va_blocksize); \ if (va.va_type == VFIFO) \ fp->fa_nfsrdev = 0xffffffff; \ else \ fp->fa_nfsrdev = txdr_unsigned(va.va_rdev); \ fp->fa_nfsfsid = txdr_unsigned(va.va_fsid); \ fp->fa_nfsfileid = txdr_unsigned(va.va_fileid); \ fp->fa_nfssize = txdr_unsigned(va.va_size); \ fp->fa_nfsblocks = txdr_unsigned(va.va_bytes / NFS_FABLKSIZE); \ txdr_nfstime(&va.va_atime, &fp->fa_nfsatime); \ txdr_nfstime(&va.va_mtime, &fp->fa_nfsmtime); \ txdr_nfstime(&va.va_ctime, &fp->fa_nfsctime); \ } else { \ fp->fa_nqblocksize = txdr_unsigned(va.va_blocksize); \ if (va.va_type == VFIFO) \ fp->fa_nqrdev = 0xffffffff; \ else \ fp->fa_nqrdev = txdr_unsigned(va.va_rdev); \ fp->fa_nqfsid = txdr_unsigned(va.va_fsid); \ fp->fa_nqfileid = txdr_unsigned(va.va_fileid); \ txdr_hyper(&va.va_size, &fp->fa_nqsize); \ txdr_hyper(&va.va_bytes, &fp->fa_nqbytes); \ txdr_nqtime(&va.va_atime, &fp->fa_nqatime); \ txdr_nqtime(&va.va_mtime, &fp->fa_nqmtime); \ txdr_nqtime(&va.va_ctime, &fp->fa_nqctime); \ fp->fa_nqflags = txdr_unsigned(va.va_flags); \ fp->fa_nqgen = txdr_unsigned(va.va_gen); \ txdr_hyper(&va.va_filerev, &fp->fa_nqfilerev); \ }