/* * 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. * * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 * $FreeBSD$ */ /* * These functions support the macros and help fiddle mbuf chains for * the nfs op functions. They do things like create the rpc header and * copy data between mbuf chains and uio lists. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Data items converted to xdr at startup, since they are constant * This is kinda hokey, but may save a little time doing byte swaps */ u_int32_t nfs_xdrneg1; u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, rpc_auth_kerb; u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false; /* And other global data */ static u_int32_t nfs_xid = 0; static enum vtype nv2tov_type[8]= { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; enum vtype nv3tov_type[8]= { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; int nfs_ticks; int nfs_pbuf_freecnt = -1; /* start out unlimited */ struct nfs_reqq nfs_reqq; struct nfssvc_sockhead nfssvc_sockhead; int nfssvc_sockhead_flag; struct nfsd_head nfsd_head; int nfsd_head_flag; struct nfs_bufq nfs_bufq; struct nqtimerhead nqtimerhead; struct nqfhhashhead *nqfhhashtbl; u_long nqfhhash; static void (*nfs_prev_lease_updatetime) __P((int)); static int nfs_prev_nfssvc_sy_narg; static sy_call_t *nfs_prev_nfssvc_sy_call; #ifndef NFS_NOSERVER static vop_t *nfs_prev_vop_lease_check; /* * Mapping of old NFS Version 2 RPC numbers to generic numbers. */ int nfsv3_procid[NFS_NPROCS] = { NFSPROC_NULL, NFSPROC_GETATTR, NFSPROC_SETATTR, NFSPROC_NOOP, NFSPROC_LOOKUP, NFSPROC_READLINK, NFSPROC_READ, NFSPROC_NOOP, NFSPROC_WRITE, NFSPROC_CREATE, NFSPROC_REMOVE, NFSPROC_RENAME, NFSPROC_LINK, NFSPROC_SYMLINK, NFSPROC_MKDIR, NFSPROC_RMDIR, NFSPROC_READDIR, NFSPROC_FSSTAT, NFSPROC_NOOP, NFSPROC_NOOP, NFSPROC_NOOP, NFSPROC_NOOP, NFSPROC_NOOP, NFSPROC_NOOP, NFSPROC_NOOP, NFSPROC_NOOP }; #endif /* NFS_NOSERVER */ /* * and the reverse mapping from generic to Version 2 procedure numbers */ int nfsv2_procid[NFS_NPROCS] = { NFSV2PROC_NULL, NFSV2PROC_GETATTR, NFSV2PROC_SETATTR, NFSV2PROC_LOOKUP, NFSV2PROC_NOOP, NFSV2PROC_READLINK, NFSV2PROC_READ, NFSV2PROC_WRITE, NFSV2PROC_CREATE, NFSV2PROC_MKDIR, NFSV2PROC_SYMLINK, NFSV2PROC_CREATE, NFSV2PROC_REMOVE, NFSV2PROC_RMDIR, NFSV2PROC_RENAME, NFSV2PROC_LINK, NFSV2PROC_READDIR, NFSV2PROC_NOOP, NFSV2PROC_STATFS, NFSV2PROC_NOOP, NFSV2PROC_NOOP, NFSV2PROC_NOOP, NFSV2PROC_NOOP, NFSV2PROC_NOOP, NFSV2PROC_NOOP, NFSV2PROC_NOOP, }; #ifndef NFS_NOSERVER /* * Maps errno values to nfs error numbers. * Use NFSERR_IO as the catch all for ones not specifically defined in * RFC 1094. */ static u_char nfsrv_v2errmap[ELAST] = { NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO /* << Last is 86 */ }; /* * Maps errno values to nfs error numbers. * Although it is not obvious whether or not NFS clients really care if * a returned error value is in the specified list for the procedure, the * safest thing to do is filter them appropriately. For Version 2, the * X/Open XNFS document is the only specification that defines error values * for each RPC (The RFC simply lists all possible error values for all RPCs), * so I have decided to not do this for Version 2. * The first entry is the default error return and the rest are the valid * errors for that RPC in increasing numeric order. */ static short nfsv3err_null[] = { 0, 0, }; static short nfsv3err_getattr[] = { NFSERR_IO, NFSERR_IO, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_setattr[] = { NFSERR_IO, NFSERR_PERM, NFSERR_IO, NFSERR_ACCES, NFSERR_INVAL, NFSERR_NOSPC, NFSERR_ROFS, NFSERR_DQUOT, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_NOT_SYNC, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_lookup[] = { NFSERR_IO, NFSERR_NOENT, NFSERR_IO, NFSERR_ACCES, NFSERR_NOTDIR, NFSERR_NAMETOL, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_access[] = { NFSERR_IO, NFSERR_IO, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_readlink[] = { NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_INVAL, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_NOTSUPP, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_read[] = { NFSERR_IO, NFSERR_IO, NFSERR_NXIO, NFSERR_ACCES, NFSERR_INVAL, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_write[] = { NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_INVAL, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_ROFS, NFSERR_DQUOT, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_create[] = { NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_EXIST, NFSERR_NOTDIR, NFSERR_NOSPC, NFSERR_ROFS, NFSERR_NAMETOL, NFSERR_DQUOT, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_NOTSUPP, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_mkdir[] = { NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_EXIST, NFSERR_NOTDIR, NFSERR_NOSPC, NFSERR_ROFS, NFSERR_NAMETOL, NFSERR_DQUOT, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_NOTSUPP, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_symlink[] = { NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_EXIST, NFSERR_NOTDIR, NFSERR_NOSPC, NFSERR_ROFS, NFSERR_NAMETOL, NFSERR_DQUOT, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_NOTSUPP, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_mknod[] = { NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_EXIST, NFSERR_NOTDIR, NFSERR_NOSPC, NFSERR_ROFS, NFSERR_NAMETOL, NFSERR_DQUOT, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_NOTSUPP, NFSERR_SERVERFAULT, NFSERR_BADTYPE, 0, }; static short nfsv3err_remove[] = { NFSERR_IO, NFSERR_NOENT, NFSERR_IO, NFSERR_ACCES, NFSERR_NOTDIR, NFSERR_ROFS, NFSERR_NAMETOL, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_rmdir[] = { NFSERR_IO, NFSERR_NOENT, NFSERR_IO, NFSERR_ACCES, NFSERR_EXIST, NFSERR_NOTDIR, NFSERR_INVAL, NFSERR_ROFS, NFSERR_NAMETOL, NFSERR_NOTEMPTY, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_NOTSUPP, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_rename[] = { NFSERR_IO, NFSERR_NOENT, NFSERR_IO, NFSERR_ACCES, NFSERR_EXIST, NFSERR_XDEV, NFSERR_NOTDIR, NFSERR_ISDIR, NFSERR_INVAL, NFSERR_NOSPC, NFSERR_ROFS, NFSERR_MLINK, NFSERR_NAMETOL, NFSERR_NOTEMPTY, NFSERR_DQUOT, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_NOTSUPP, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_link[] = { NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_EXIST, NFSERR_XDEV, NFSERR_NOTDIR, NFSERR_INVAL, NFSERR_NOSPC, NFSERR_ROFS, NFSERR_MLINK, NFSERR_NAMETOL, NFSERR_DQUOT, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_NOTSUPP, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_readdir[] = { NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_NOTDIR, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_BAD_COOKIE, NFSERR_TOOSMALL, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_readdirplus[] = { NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_NOTDIR, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_BAD_COOKIE, NFSERR_NOTSUPP, NFSERR_TOOSMALL, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_fsstat[] = { NFSERR_IO, NFSERR_IO, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_fsinfo[] = { NFSERR_STALE, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_pathconf[] = { NFSERR_STALE, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_SERVERFAULT, 0, }; static short nfsv3err_commit[] = { NFSERR_IO, NFSERR_IO, NFSERR_STALE, NFSERR_BADHANDLE, NFSERR_SERVERFAULT, 0, }; static short *nfsrv_v3errmap[] = { nfsv3err_null, nfsv3err_getattr, nfsv3err_setattr, nfsv3err_lookup, nfsv3err_access, nfsv3err_readlink, nfsv3err_read, nfsv3err_write, nfsv3err_create, nfsv3err_mkdir, nfsv3err_symlink, nfsv3err_mknod, nfsv3err_remove, nfsv3err_rmdir, nfsv3err_rename, nfsv3err_link, nfsv3err_readdir, nfsv3err_readdirplus, nfsv3err_fsstat, nfsv3err_fsinfo, nfsv3err_pathconf, nfsv3err_commit, }; #endif /* NFS_NOSERVER */ extern struct nfsrtt nfsrtt; extern time_t nqnfsstarttime; extern int nqsrv_clockskew; extern int nqsrv_writeslack; extern int nqsrv_maxlease; extern struct nfsstats nfsstats; extern int nqnfs_piggy[NFS_NPROCS]; extern nfstype nfsv2_type[9]; extern nfstype nfsv3_type[9]; extern struct nfsnodehashhead *nfsnodehashtbl; extern u_long nfsnodehash; struct nfssvc_args; extern int nfssvc(struct proc *, struct nfssvc_args *, int *); LIST_HEAD(nfsnodehashhead, nfsnode); int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); u_quad_t nfs_curusec() { struct timeval tv; getmicrotime(&tv); return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec); } /* * Create the header for an rpc request packet * The hsiz is the size of the rest of the nfs request header. * (just used to decide if a cluster is a good idea) */ struct mbuf * nfsm_reqh(vp, procid, hsiz, bposp) struct vnode *vp; u_long procid; int hsiz; caddr_t *bposp; { register struct mbuf *mb; register u_int32_t *tl; register caddr_t bpos; struct mbuf *mb2; struct nfsmount *nmp; int nqflag; MGET(mb, M_WAIT, MT_DATA); if (hsiz >= MINCLSIZE) MCLGET(mb, M_WAIT); mb->m_len = 0; bpos = mtod(mb, caddr_t); /* * For NQNFS, add lease request. */ if (vp) { nmp = VFSTONFS(vp->v_mount); if (nmp->nm_flag & NFSMNT_NQNFS) { nqflag = NQNFS_NEEDLEASE(vp, procid); if (nqflag) { nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); *tl++ = txdr_unsigned(nqflag); *tl = txdr_unsigned(nmp->nm_leaseterm); } else { nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); *tl = 0; } } } /* Finally, return values */ *bposp = bpos; return (mb); } /* * Build the RPC header and fill in the authorization info. * The authorization string argument is only used when the credentials * come from outside of the kernel. * Returns the head of the mbuf list. */ struct mbuf * nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, verf_str, mrest, mrest_len, mbp, xidp) register struct ucred *cr; int nmflag; int procid; int auth_type; int auth_len; char *auth_str; int verf_len; char *verf_str; struct mbuf *mrest; int mrest_len; struct mbuf **mbp; u_int32_t *xidp; { register struct mbuf *mb; register u_int32_t *tl; register caddr_t bpos; register int i; struct mbuf *mreq, *mb2; int siz, grpsiz, authsiz; authsiz = nfsm_rndup(auth_len); MGETHDR(mb, M_WAIT, MT_DATA); if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { MCLGET(mb, M_WAIT); } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); } else { MH_ALIGN(mb, 8 * NFSX_UNSIGNED); } mb->m_len = 0; mreq = mb; bpos = mtod(mb, caddr_t); /* * First the RPC header. */ nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); /* Get a pretty random xid to start with */ if (!nfs_xid) nfs_xid = random(); /* * Skip zero xid if it should ever happen. */ if (++nfs_xid == 0) nfs_xid++; *tl++ = *xidp = txdr_unsigned(nfs_xid); *tl++ = rpc_call; *tl++ = rpc_vers; if (nmflag & NFSMNT_NQNFS) { *tl++ = txdr_unsigned(NQNFS_PROG); *tl++ = txdr_unsigned(NQNFS_VER3); } else { *tl++ = txdr_unsigned(NFS_PROG); if (nmflag & NFSMNT_NFSV3) *tl++ = txdr_unsigned(NFS_VER3); else *tl++ = txdr_unsigned(NFS_VER2); } if (nmflag & NFSMNT_NFSV3) *tl++ = txdr_unsigned(procid); else *tl++ = txdr_unsigned(nfsv2_procid[procid]); /* * And then the authorization cred. */ *tl++ = txdr_unsigned(auth_type); *tl = txdr_unsigned(authsiz); switch (auth_type) { case RPCAUTH_UNIX: nfsm_build(tl, u_int32_t *, auth_len); *tl++ = 0; /* stamp ?? */ *tl++ = 0; /* NULL hostname */ *tl++ = txdr_unsigned(cr->cr_uid); *tl++ = txdr_unsigned(cr->cr_groups[0]); grpsiz = (auth_len >> 2) - 5; *tl++ = txdr_unsigned(grpsiz); for (i = 1; i <= grpsiz; i++) *tl++ = txdr_unsigned(cr->cr_groups[i]); break; case RPCAUTH_KERB4: siz = auth_len; while (siz > 0) { if (M_TRAILINGSPACE(mb) == 0) { MGET(mb2, M_WAIT, MT_DATA); if (siz >= MINCLSIZE) MCLGET(mb2, M_WAIT); mb->m_next = mb2; mb = mb2; mb->m_len = 0; bpos = mtod(mb, caddr_t); } i = min(siz, M_TRAILINGSPACE(mb)); bcopy(auth_str, bpos, i); mb->m_len += i; auth_str += i; bpos += i; siz -= i; } if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { for (i = 0; i < siz; i++) *bpos++ = '\0'; mb->m_len += siz; } break; }; /* * And the verifier... */ nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); if (verf_str) { *tl++ = txdr_unsigned(RPCAUTH_KERB4); *tl = txdr_unsigned(verf_len); siz = verf_len; while (siz > 0) { if (M_TRAILINGSPACE(mb) == 0) { MGET(mb2, M_WAIT, MT_DATA); if (siz >= MINCLSIZE) MCLGET(mb2, M_WAIT); mb->m_next = mb2; mb = mb2; mb->m_len = 0; bpos = mtod(mb, caddr_t); } i = min(siz, M_TRAILINGSPACE(mb)); bcopy(verf_str, bpos, i); mb->m_len += i; verf_str += i; bpos += i; siz -= i; } if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { for (i = 0; i < siz; i++) *bpos++ = '\0'; mb->m_len += siz; } } else { *tl++ = txdr_unsigned(RPCAUTH_NULL); *tl = 0; } mb->m_next = mrest; mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; mreq->m_pkthdr.rcvif = (struct ifnet *)0; *mbp = mb; return (mreq); } /* * copies mbuf chain to the uio scatter/gather list */ int nfsm_mbuftouio(mrep, uiop, siz, dpos) struct mbuf **mrep; register struct uio *uiop; int siz; caddr_t *dpos; { register char *mbufcp, *uiocp; register int xfer, left, len; register struct mbuf *mp; long uiosiz, rem; int error = 0; mp = *mrep; mbufcp = *dpos; len = mtod(mp, caddr_t)+mp->m_len-mbufcp; rem = nfsm_rndup(siz)-siz; while (siz > 0) { if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) return (EFBIG); left = uiop->uio_iov->iov_len; uiocp = uiop->uio_iov->iov_base; if (left > siz) left = siz; uiosiz = left; while (left > 0) { while (len == 0) { mp = mp->m_next; if (mp == NULL) return (EBADRPC); mbufcp = mtod(mp, caddr_t); len = mp->m_len; } xfer = (left > len) ? len : left; #ifdef notdef /* Not Yet.. */ if (uiop->uio_iov->iov_op != NULL) (*(uiop->uio_iov->iov_op)) (mbufcp, uiocp, xfer); else #endif if (uiop->uio_segflg == UIO_SYSSPACE) bcopy(mbufcp, uiocp, xfer); else copyout(mbufcp, uiocp, xfer); left -= xfer; len -= xfer; mbufcp += xfer; uiocp += xfer; uiop->uio_offset += xfer; uiop->uio_resid -= xfer; } if (uiop->uio_iov->iov_len <= siz) { uiop->uio_iovcnt--; uiop->uio_iov++; } else { uiop->uio_iov->iov_base += uiosiz; uiop->uio_iov->iov_len -= uiosiz; } siz -= uiosiz; } *dpos = mbufcp; *mrep = mp; if (rem > 0) { if (len < rem) error = nfs_adv(mrep, dpos, rem, len); else *dpos += rem; } return (error); } /* * copies a uio scatter/gather list to an mbuf chain. * NOTE: can ony handle iovcnt == 1 */ int nfsm_uiotombuf(uiop, mq, siz, bpos) register struct uio *uiop; struct mbuf **mq; int siz; caddr_t *bpos; { register char *uiocp; register struct mbuf *mp, *mp2; register int xfer, left, mlen; int uiosiz, clflg, rem; char *cp; #ifdef DIAGNOSTIC if (uiop->uio_iovcnt != 1) panic("nfsm_uiotombuf: iovcnt != 1"); #endif if (siz > MLEN) /* or should it >= MCLBYTES ?? */ clflg = 1; else clflg = 0; rem = nfsm_rndup(siz)-siz; mp = mp2 = *mq; while (siz > 0) { left = uiop->uio_iov->iov_len; uiocp = uiop->uio_iov->iov_base; if (left > siz) left = siz; uiosiz = left; while (left > 0) { mlen = M_TRAILINGSPACE(mp); if (mlen == 0) { MGET(mp, M_WAIT, MT_DATA); if (clflg) MCLGET(mp, M_WAIT); mp->m_len = 0; mp2->m_next = mp; mp2 = mp; mlen = M_TRAILINGSPACE(mp); } xfer = (left > mlen) ? mlen : left; #ifdef notdef /* Not Yet.. */ if (uiop->uio_iov->iov_op != NULL) (*(uiop->uio_iov->iov_op)) (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); else #endif if (uiop->uio_segflg == UIO_SYSSPACE) bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); else copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); mp->m_len += xfer; left -= xfer; uiocp += xfer; uiop->uio_offset += xfer; uiop->uio_resid -= xfer; } uiop->uio_iov->iov_base += uiosiz; uiop->uio_iov->iov_len -= uiosiz; siz -= uiosiz; } if (rem > 0) { if (rem > M_TRAILINGSPACE(mp)) { MGET(mp, M_WAIT, MT_DATA); mp->m_len = 0; mp2->m_next = mp; } cp = mtod(mp, caddr_t)+mp->m_len; for (left = 0; left < rem; left++) *cp++ = '\0'; mp->m_len += rem; *bpos = cp; } else *bpos = mtod(mp, caddr_t)+mp->m_len; *mq = mp; return (0); } /* * Help break down an mbuf chain by setting the first siz bytes contiguous * pointed to by returned val. * This is used by the macros nfsm_dissect and nfsm_dissecton for tough * cases. (The macros use the vars. dpos and dpos2) */ int nfsm_disct(mdp, dposp, siz, left, cp2) struct mbuf **mdp; caddr_t *dposp; int siz; int left; caddr_t *cp2; { register struct mbuf *mp, *mp2; register int siz2, xfer; register caddr_t p; mp = *mdp; while (left == 0) { *mdp = mp = mp->m_next; if (mp == NULL) return (EBADRPC); left = mp->m_len; *dposp = mtod(mp, caddr_t); } if (left >= siz) { *cp2 = *dposp; *dposp += siz; } else if (mp->m_next == NULL) { return (EBADRPC); } else if (siz > MHLEN) { panic("nfs S too big"); } else { MGET(mp2, M_WAIT, MT_DATA); mp2->m_next = mp->m_next; mp->m_next = mp2; mp->m_len -= left; mp = mp2; *cp2 = p = mtod(mp, caddr_t); bcopy(*dposp, p, left); /* Copy what was left */ siz2 = siz-left; p += left; mp2 = mp->m_next; /* Loop around copying up the siz2 bytes */ while (siz2 > 0) { if (mp2 == NULL) return (EBADRPC); xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; if (xfer > 0) { bcopy(mtod(mp2, caddr_t), p, xfer); NFSMADV(mp2, xfer); mp2->m_len -= xfer; p += xfer; siz2 -= xfer; } if (siz2 > 0) mp2 = mp2->m_next; } mp->m_len = siz; *mdp = mp2; *dposp = mtod(mp2, caddr_t); } return (0); } /* * Advance the position in the mbuf chain. */ int nfs_adv(mdp, dposp, offs, left) struct mbuf **mdp; caddr_t *dposp; int offs; int left; { register struct mbuf *m; register int s; m = *mdp; s = left; while (s < offs) { offs -= s; m = m->m_next; if (m == NULL) return (EBADRPC); s = m->m_len; } *mdp = m; *dposp = mtod(m, caddr_t)+offs; return (0); } /* * Copy a string into mbufs for the hard cases... */ int nfsm_strtmbuf(mb, bpos, cp, siz) struct mbuf **mb; char **bpos; const char *cp; long siz; { register struct mbuf *m1 = NULL, *m2; long left, xfer, len, tlen; u_int32_t *tl; int putsize; putsize = 1; m2 = *mb; left = M_TRAILINGSPACE(m2); if (left > 0) { tl = ((u_int32_t *)(*bpos)); *tl++ = txdr_unsigned(siz); putsize = 0; left -= NFSX_UNSIGNED; m2->m_len += NFSX_UNSIGNED; if (left > 0) { bcopy(cp, (caddr_t) tl, left); siz -= left; cp += left; m2->m_len += left; left = 0; } } /* Loop around adding mbufs */ while (siz > 0) { MGET(m1, M_WAIT, MT_DATA); if (siz > MLEN) MCLGET(m1, M_WAIT); m1->m_len = NFSMSIZ(m1); m2->m_next = m1; m2 = m1; tl = mtod(m1, u_int32_t *); tlen = 0; if (putsize) { *tl++ = txdr_unsigned(siz); m1->m_len -= NFSX_UNSIGNED; tlen = NFSX_UNSIGNED; putsize = 0; } if (siz < m1->m_len) { len = nfsm_rndup(siz); xfer = siz; if (xfer < len) *(tl+(xfer>>2)) = 0; } else { xfer = len = m1->m_len; } bcopy(cp, (caddr_t) tl, xfer); m1->m_len = len+tlen; siz -= xfer; cp += xfer; } *mb = m1; *bpos = mtod(m1, caddr_t)+m1->m_len; return (0); } /* * Called once to initialize data structures... */ int nfs_init(vfsp) struct vfsconf *vfsp; { register int i; nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1); nfs_mount_type = vfsp->vfc_typenum; nfsrtt.pos = 0; rpc_vers = txdr_unsigned(RPC_VER2); rpc_call = txdr_unsigned(RPC_CALL); rpc_reply = txdr_unsigned(RPC_REPLY); rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); rpc_mismatch = txdr_unsigned(RPC_MISMATCH); rpc_autherr = txdr_unsigned(RPC_AUTHERR); rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); nfs_prog = txdr_unsigned(NFS_PROG); nqnfs_prog = txdr_unsigned(NQNFS_PROG); nfs_true = txdr_unsigned(TRUE); nfs_false = txdr_unsigned(FALSE); nfs_xdrneg1 = txdr_unsigned(-1); nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; if (nfs_ticks < 1) nfs_ticks = 1; /* Ensure async daemons disabled */ for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { nfs_iodwant[i] = (struct proc *)0; nfs_iodmount[i] = (struct nfsmount *)0; } nfs_nhinit(); /* Init the nfsnode table */ #ifndef NFS_NOSERVER nfsrv_init(0); /* Init server data structures */ nfsrv_initcache(); /* Init the server request cache */ #endif /* * Initialize the nqnfs server stuff. */ if (nqnfsstarttime == 0) { nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease + nqsrv_clockskew + nqsrv_writeslack; NQLOADNOVRAM(nqnfsstarttime); CIRCLEQ_INIT(&nqtimerhead); nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash); } /* * Initialize reply list and start timer */ TAILQ_INIT(&nfs_reqq); nfs_timer(0); /* * Set up lease_check and lease_updatetime so that other parts * of the system can call us, if we are loadable. */ #ifndef NFS_NOSERVER nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)]; default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check; #endif nfs_prev_lease_updatetime = lease_updatetime; lease_updatetime = nfs_lease_updatetime; nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg; sysent[SYS_nfssvc].sy_narg = 2; nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call; sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc; nfs_pbuf_freecnt = nswbuf / 2 + 1; return (0); } int nfs_uninit(vfsp) struct vfsconf *vfsp; { untimeout(nfs_timer, (void *)NULL, nfs_timer_handle); nfs_mount_type = -1; #ifndef NFS_NOSERVER default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check; #endif lease_updatetime = nfs_prev_lease_updatetime; sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg; sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call; return (0); } /* * Attribute cache routines. * nfs_loadattrcache() - loads or updates the cache contents from attributes * that are on the mbuf list * nfs_getattrcache() - returns valid attributes if found in cache, returns * error otherwise */ /* * Load the attribute cache (that lives in the nfsnode entry) with * the values on the mbuf list and * Iff vap not NULL * copy the attributes to *vaper */ int nfs_loadattrcache(vpp, mdp, dposp, vaper) struct vnode **vpp; struct mbuf **mdp; caddr_t *dposp; struct vattr *vaper; { register struct vnode *vp = *vpp; register struct vattr *vap; register struct nfs_fattr *fp; register struct nfsnode *np; register int32_t t1; caddr_t cp2; int error = 0, rdev; struct mbuf *md; enum vtype vtyp; u_short vmode; struct timespec mtime; int v3 = NFS_ISV3(vp); md = *mdp; t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0) return (error); fp = (struct nfs_fattr *)cp2; if (v3) { vtyp = nfsv3tov_type(fp->fa_type); vmode = fxdr_unsigned(u_short, fp->fa_mode); rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1), fxdr_unsigned(int, fp->fa3_rdev.specdata2)); fxdr_nfsv3time(&fp->fa3_mtime, &mtime); } else { vtyp = nfsv2tov_type(fp->fa_type); vmode = fxdr_unsigned(u_short, fp->fa_mode); /* * XXX * * The duplicate information returned in fa_type and fa_mode * is an ambiguity in the NFS version 2 protocol. * * VREG should be taken literally as a regular file. If a * server intents to return some type information differently * in the upper bits of the mode field (e.g. for sockets, or * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we * leave the examination of the mode bits even in the VREG * case to avoid breakage for bogus servers, but we make sure * that there are actually type bits set in the upper part of * fa_mode (and failing that, trust the va_type field). * * NFSv3 cleared the issue, and requires fa_mode to not * contain any type information (while also introduing sockets * and FIFOs for fa_type). */ if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0)) vtyp = IFTOVT(vmode); rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); fxdr_nfsv2time(&fp->fa2_mtime, &mtime); /* * Really ugly NFSv2 kludge. */ if (vtyp == VCHR && rdev == 0xffffffff) vtyp = VFIFO; } /* * If v_type == VNON it is a new node, so fill in the v_type, * n_mtime fields. Check to see if it represents a special * device, and if so, check for a possible alias. Once the * correct vnode has been obtained, fill in the rest of the * information. */ np = VTONFS(vp); if (vp->v_type != vtyp) { vp->v_type = vtyp; if (vp->v_type == VFIFO) { vp->v_op = fifo_nfsv2nodeop_p; } if (vp->v_type == VCHR || vp->v_type == VBLK) { vp->v_op = spec_nfsv2nodeop_p; addaliasu(vp, rdev); } np->n_mtime = mtime.tv_sec; } vap = &np->n_vattr; vap->va_type = vtyp; vap->va_mode = (vmode & 07777); vap->va_rdev = rdev; vap->va_mtime = mtime; vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; if (v3) { vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); vap->va_size = fxdr_hyper(&fp->fa3_size); vap->va_blocksize = NFS_FABLKSIZE; vap->va_bytes = fxdr_hyper(&fp->fa3_used); vap->va_fileid = fxdr_unsigned(int32_t, fp->fa3_fileid.nfsuquad[1]); fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); vap->va_flags = 0; vap->va_filerev = 0; } else { vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) * NFS_FABLKSIZE; vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); vap->va_flags = 0; vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, fp->fa2_ctime.nfsv2_sec); vap->va_ctime.tv_nsec = 0; vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); vap->va_filerev = 0; } if (vap->va_size != np->n_size) { if (vap->va_type == VREG) { if (np->n_flag & NMODIFIED) { if (vap->va_size < np->n_size) vap->va_size = np->n_size; else np->n_size = vap->va_size; } else { np->n_size = vap->va_size; } vnode_pager_setsize(vp, np->n_size); } else { np->n_size = vap->va_size; } } np->n_attrstamp = time_second; if (vaper != NULL) { bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); if (np->n_flag & NCHG) { if (np->n_flag & NACC) vaper->va_atime = np->n_atim; if (np->n_flag & NUPD) vaper->va_mtime = np->n_mtim; } } return (0); } #ifdef NFS_ACDEBUG #include SYSCTL_DECL(_vfs_nfs); static int nfs_acdebug; SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, ""); #endif /* * Check the time stamp * If the cache is valid, copy contents to *vap and return 0 * otherwise return an error */ int nfs_getattrcache(vp, vaper) register struct vnode *vp; struct vattr *vaper; { register struct nfsnode *np; register struct vattr *vap; struct nfsmount *nmp; int timeo; np = VTONFS(vp); vap = &np->n_vattr; nmp = VFSTONFS(vp->v_mount); /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */ timeo = (time_second - np->n_mtime) / 10; #ifdef NFS_ACDEBUG if (nfs_acdebug>1) printf("nfs_getattrcache: initial timeo = %d\n", timeo); #endif if (vap->va_type == VDIR) { if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin) timeo = nmp->nm_acdirmin; else if (timeo > nmp->nm_acdirmax) timeo = nmp->nm_acdirmax; } else { if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin) timeo = nmp->nm_acregmin; else if (timeo > nmp->nm_acregmax) timeo = nmp->nm_acregmax; } #ifdef NFS_ACDEBUG if (nfs_acdebug > 2) printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n", nmp->nm_acregmin, nmp->nm_acregmax, nmp->nm_acdirmin, nmp->nm_acdirmax); if (nfs_acdebug) printf("nfs_getattrcache: age = %d; final timeo = %d\n", (time_second - np->n_attrstamp), timeo); #endif if ((time_second - np->n_attrstamp) >= timeo) { nfsstats.attrcache_misses++; return (ENOENT); } nfsstats.attrcache_hits++; if (vap->va_size != np->n_size) { if (vap->va_type == VREG) { if (np->n_flag & NMODIFIED) { if (vap->va_size < np->n_size) vap->va_size = np->n_size; else np->n_size = vap->va_size; } else { np->n_size = vap->va_size; } vnode_pager_setsize(vp, np->n_size); } else { np->n_size = vap->va_size; } } bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); if (np->n_flag & NCHG) { if (np->n_flag & NACC) vaper->va_atime = np->n_atim; if (np->n_flag & NUPD) vaper->va_mtime = np->n_mtim; } return (0); } #ifndef NFS_NOSERVER /* * Set up nameidata for a lookup() call and do it. * * If pubflag is set, this call is done for a lookup operation on the * public filehandle. In that case we allow crossing mountpoints and * absolute pathnames. However, the caller is expected to check that * the lookup result is within the public fs, and deny access if * it is not. * * nfs_namei() clears out garbage fields that namei() might leave garbage. * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no * error occurs but the parent was not requested. * * dirp may be set whether an error is returned or not, and must be * released by the caller. */ int nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) register struct nameidata *ndp; fhandle_t *fhp; int len; struct nfssvc_sock *slp; struct sockaddr *nam; struct mbuf **mdp; caddr_t *dposp; struct vnode **retdirp; struct proc *p; int kerbflag, pubflag; { register int i, rem; register struct mbuf *md; register char *fromcp, *tocp, *cp; struct iovec aiov; struct uio auio; struct vnode *dp; int error, rdonly, linklen; struct componentname *cnp = &ndp->ni_cnd; *retdirp = (struct vnode *)0; cnp->cn_pnbuf = zalloc(namei_zone); /* * Copy the name from the mbuf list to ndp->ni_pnbuf * and set the various ndp fields appropriately. */ fromcp = *dposp; tocp = cnp->cn_pnbuf; md = *mdp; rem = mtod(md, caddr_t) + md->m_len - fromcp; for (i = 0; i < len; i++) { while (rem == 0) { md = md->m_next; if (md == NULL) { error = EBADRPC; goto out; } fromcp = mtod(md, caddr_t); rem = md->m_len; } if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { error = EACCES; goto out; } *tocp++ = *fromcp++; rem--; } *tocp = '\0'; *mdp = md; *dposp = fromcp; len = nfsm_rndup(len)-len; if (len > 0) { if (rem >= len) *dposp += len; else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) goto out; } /* * Extract and set starting directory. */ error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, nam, &rdonly, kerbflag, pubflag); if (error) goto out; if (dp->v_type != VDIR) { vrele(dp); error = ENOTDIR; goto out; } if (rdonly) cnp->cn_flags |= RDONLY; /* * Set return directory. Reference to dp is implicitly transfered * to the returned pointer */ *retdirp = dp; if (pubflag) { /* * Oh joy. For WebNFS, handle those pesky '%' escapes, * and the 'native path' indicator. */ cp = zalloc(namei_zone); fromcp = cnp->cn_pnbuf; tocp = cp; if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { switch ((unsigned char)*fromcp) { case WEBNFS_NATIVE_CHAR: /* * 'Native' path for us is the same * as a path according to the NFS spec, * just skip the escape char. */ fromcp++; break; /* * More may be added in the future, range 0x80-0xff */ default: error = EIO; zfree(namei_zone, cp); goto out; } } /* * Translate the '%' escapes, URL-style. */ while (*fromcp != '\0') { if (*fromcp == WEBNFS_ESC_CHAR) { if (fromcp[1] != '\0' && fromcp[2] != '\0') { fromcp++; *tocp++ = HEXSTRTOI(fromcp); fromcp += 2; continue; } else { error = ENOENT; zfree(namei_zone, cp); goto out; } } else *tocp++ = *fromcp++; } *tocp = '\0'; zfree(namei_zone, cnp->cn_pnbuf); cnp->cn_pnbuf = cp; } ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; ndp->ni_segflg = UIO_SYSSPACE; if (pubflag) { ndp->ni_rootdir = rootvnode; ndp->ni_loopcnt = 0; if (cnp->cn_pnbuf[0] == '/') dp = rootvnode; } else { cnp->cn_flags |= NOCROSSMOUNT; } /* * Initialize for scan, set ni_startdir and bump ref on dp again * becuase lookup() will dereference ni_startdir. */ cnp->cn_proc = p; VREF(dp); ndp->ni_startdir = dp; for (;;) { cnp->cn_nameptr = cnp->cn_pnbuf; /* * Call lookup() to do the real work. If an error occurs, * ndp->ni_vp and ni_dvp are left uninitialized or NULL and * we do not have to dereference anything before returning. * In either case ni_startdir will be dereferenced and NULLed * out. */ error = lookup(ndp); if (error) break; /* * Check for encountering a symbolic link. Trivial * termination occurs if no symlink encountered. * Note: zfree is safe because error is 0, so we will * not zfree it again when we break. */ if ((cnp->cn_flags & ISSYMLINK) == 0) { nfsrv_object_create(ndp->ni_vp); if (cnp->cn_flags & (SAVENAME | SAVESTART)) cnp->cn_flags |= HASBUF; else zfree(namei_zone, cnp->cn_pnbuf); break; } /* * Validate symlink */ if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) VOP_UNLOCK(ndp->ni_dvp, 0, p); if (!pubflag) { error = EINVAL; goto badlink2; } if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { error = ELOOP; goto badlink2; } if (ndp->ni_pathlen > 1) cp = zalloc(namei_zone); else cp = cnp->cn_pnbuf; aiov.iov_base = cp; aiov.iov_len = MAXPATHLEN; auio.uio_iov = &aiov; auio.uio_iovcnt = 1; auio.uio_offset = 0; auio.uio_rw = UIO_READ; auio.uio_segflg = UIO_SYSSPACE; auio.uio_procp = (struct proc *)0; auio.uio_resid = MAXPATHLEN; error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); if (error) { badlink1: if (ndp->ni_pathlen > 1) zfree(namei_zone, cp); badlink2: vrele(ndp->ni_dvp); vput(ndp->ni_vp); break; } linklen = MAXPATHLEN - auio.uio_resid; if (linklen == 0) { error = ENOENT; goto badlink1; } if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { error = ENAMETOOLONG; goto badlink1; } /* * Adjust or replace path */ if (ndp->ni_pathlen > 1) { bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen); zfree(namei_zone, cnp->cn_pnbuf); cnp->cn_pnbuf = cp; } else cnp->cn_pnbuf[linklen] = '\0'; ndp->ni_pathlen += linklen; /* * Cleanup refs for next loop and check if root directory * should replace current directory. Normally ni_dvp * becomes the new base directory and is cleaned up when * we loop. Explicitly null pointers after invalidation * to clarify operation. */ vput(ndp->ni_vp); ndp->ni_vp = NULL; if (cnp->cn_pnbuf[0] == '/') { vrele(ndp->ni_dvp); ndp->ni_dvp = ndp->ni_rootdir; VREF(ndp->ni_dvp); } ndp->ni_startdir = ndp->ni_dvp; ndp->ni_dvp = NULL; } /* * nfs_namei() guarentees that fields will not contain garbage * whether an error occurs or not. This allows the caller to track * cleanup state trivially. */ out: if (error) { zfree(namei_zone, cnp->cn_pnbuf); ndp->ni_vp = NULL; ndp->ni_dvp = NULL; ndp->ni_startdir = NULL; cnp->cn_flags &= ~HASBUF; } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) { ndp->ni_dvp = NULL; } return (error); } /* * A fiddled version of m_adj() that ensures null fill to a long * boundary and only trims off the back end */ void nfsm_adj(mp, len, nul) struct mbuf *mp; register int len; int nul; { register struct mbuf *m; register int count, i; register char *cp; /* * Trim from tail. Scan the mbuf chain, * calculating its length and finding the last mbuf. * If the adjustment only affects this mbuf, then just * adjust and return. Otherwise, rescan and truncate * after the remaining size. */ count = 0; m = mp; for (;;) { count += m->m_len; if (m->m_next == (struct mbuf *)0) break; m = m->m_next; } if (m->m_len > len) { m->m_len -= len; if (nul > 0) { cp = mtod(m, caddr_t)+m->m_len-nul; for (i = 0; i < nul; i++) *cp++ = '\0'; } return; } count -= len; if (count < 0) count = 0; /* * Correct length for chain is "count". * Find the mbuf with last data, adjust its length, * and toss data from remaining mbufs on chain. */ for (m = mp; m; m = m->m_next) { if (m->m_len >= count) { m->m_len = count; if (nul > 0) { cp = mtod(m, caddr_t)+m->m_len-nul; for (i = 0; i < nul; i++) *cp++ = '\0'; } break; } count -= m->m_len; } for (m = m->m_next;m;m = m->m_next) m->m_len = 0; } /* * Make these functions instead of macros, so that the kernel text size * doesn't get too big... */ void nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) struct nfsrv_descript *nfsd; int before_ret; register struct vattr *before_vap; int after_ret; struct vattr *after_vap; struct mbuf **mbp; char **bposp; { register struct mbuf *mb = *mbp, *mb2; register char *bpos = *bposp; register u_int32_t *tl; if (before_ret) { nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); *tl = nfs_false; } else { nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); *tl++ = nfs_true; txdr_hyper(before_vap->va_size, tl); tl += 2; txdr_nfsv3time(&(before_vap->va_mtime), tl); tl += 2; txdr_nfsv3time(&(before_vap->va_ctime), tl); } *bposp = bpos; *mbp = mb; nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); } void nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) struct nfsrv_descript *nfsd; int after_ret; struct vattr *after_vap; struct mbuf **mbp; char **bposp; { register struct mbuf *mb = *mbp, *mb2; register char *bpos = *bposp; register u_int32_t *tl; register struct nfs_fattr *fp; if (after_ret) { nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); *tl = nfs_false; } else { nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); *tl++ = nfs_true; fp = (struct nfs_fattr *)tl; nfsm_srvfattr(nfsd, after_vap, fp); } *mbp = mb; *bposp = bpos; } void nfsm_srvfattr(nfsd, vap, fp) register struct nfsrv_descript *nfsd; register struct vattr *vap; register struct nfs_fattr *fp; { fp->fa_nlink = txdr_unsigned(vap->va_nlink); fp->fa_uid = txdr_unsigned(vap->va_uid); fp->fa_gid = txdr_unsigned(vap->va_gid); if (nfsd->nd_flag & ND_NFSV3) { fp->fa_type = vtonfsv3_type(vap->va_type); fp->fa_mode = vtonfsv3_mode(vap->va_mode); txdr_hyper(vap->va_size, &fp->fa3_size); txdr_hyper(vap->va_bytes, &fp->fa3_used); fp->fa3_rdev.specdata1 = txdr_unsigned(umajor(vap->va_rdev)); fp->fa3_rdev.specdata2 = txdr_unsigned(uminor(vap->va_rdev)); fp->fa3_fsid.nfsuquad[0] = 0; fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); fp->fa3_fileid.nfsuquad[0] = 0; fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); } else { fp->fa_type = vtonfsv2_type(vap->va_type); fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); fp->fa2_size = txdr_unsigned(vap->va_size); fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); if (vap->va_type == VFIFO) fp->fa2_rdev = 0xffffffff; else fp->fa2_rdev = txdr_unsigned(vap->va_rdev); fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); fp->fa2_fsid = txdr_unsigned(vap->va_fsid); fp->fa2_fileid = txdr_unsigned(vap->va_fileid); txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); } } /* * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) * - look up fsid in mount list (if not found ret error) * - get vp and export rights by calling VFS_FHTOVP() * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon * - if not lockflag unlock it with VOP_UNLOCK() */ int nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) fhandle_t *fhp; int lockflag; struct vnode **vpp; struct ucred *cred; struct nfssvc_sock *slp; struct sockaddr *nam; int *rdonlyp; int kerbflag; int pubflag; { struct proc *p = curproc; /* XXX */ register struct mount *mp; register int i; struct ucred *credanon; int error, exflags; #ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */ struct sockaddr_int *saddr; #endif *vpp = (struct vnode *)0; if (nfs_ispublicfh(fhp)) { if (!pubflag || !nfs_pub.np_valid) return (ESTALE); fhp = &nfs_pub.np_handle; } mp = vfs_getvfs(&fhp->fh_fsid); if (!mp) return (ESTALE); error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); if (error) return (error); error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); if (error) return (error); #ifdef MNT_EXNORESPORT if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { saddr = (struct sockaddr_in *)nam; if (saddr->sin_family == AF_INET && ntohs(saddr->sin_port) >= IPPORT_RESERVED) { vput(*vpp); *vpp = NULL; return (NFSERR_AUTHERR | AUTH_TOOWEAK); } } #endif /* * Check/setup credentials. */ if (exflags & MNT_EXKERB) { if (!kerbflag) { vput(*vpp); *vpp = NULL; return (NFSERR_AUTHERR | AUTH_TOOWEAK); } } else if (kerbflag) { vput(*vpp); *vpp = NULL; return (NFSERR_AUTHERR | AUTH_TOOWEAK); } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { cred->cr_uid = credanon->cr_uid; for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) cred->cr_groups[i] = credanon->cr_groups[i]; cred->cr_ngroups = i; } if (exflags & MNT_EXRDONLY) *rdonlyp = 1; else *rdonlyp = 0; nfsrv_object_create(*vpp); if (!lockflag) VOP_UNLOCK(*vpp, 0, p); return (0); } /* * WebNFS: check if a filehandle is a public filehandle. For v3, this * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has * transformed this to all zeroes in both cases, so check for it. */ int nfs_ispublicfh(fhp) fhandle_t *fhp; { char *cp = (char *)fhp; int i; for (i = 0; i < NFSX_V3FH; i++) if (*cp++ != 0) return (FALSE); return (TRUE); } #endif /* NFS_NOSERVER */ /* * This function compares two net addresses by family and returns TRUE * if they are the same host. * If there is any doubt, return FALSE. * The AF_INET family is handled as a special case so that address mbufs * don't need to be saved to store "struct in_addr", which is only 4 bytes. */ int netaddr_match(family, haddr, nam) int family; union nethostaddr *haddr; struct sockaddr *nam; { register struct sockaddr_in *inetaddr; switch (family) { case AF_INET: inetaddr = (struct sockaddr_in *)nam; if (inetaddr->sin_family == AF_INET && inetaddr->sin_addr.s_addr == haddr->had_inetaddr) return (1); break; default: break; }; return (0); } static nfsuint64 nfs_nullcookie = { { 0, 0 } }; /* * This function finds the directory cookie that corresponds to the * logical byte offset given. */ nfsuint64 * nfs_getcookie(np, off, add) register struct nfsnode *np; off_t off; int add; { register struct nfsdmap *dp, *dp2; register int pos; pos = (uoff_t)off / NFS_DIRBLKSIZ; if (pos == 0 || off < 0) { #ifdef DIAGNOSTIC if (add) panic("nfs getcookie add at <= 0"); #endif return (&nfs_nullcookie); } pos--; dp = np->n_cookies.lh_first; if (!dp) { if (add) { MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap), M_NFSDIROFF, M_WAITOK); dp->ndm_eocookie = 0; LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); } else return ((nfsuint64 *)0); } while (pos >= NFSNUMCOOKIES) { pos -= NFSNUMCOOKIES; if (dp->ndm_list.le_next) { if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && pos >= dp->ndm_eocookie) return ((nfsuint64 *)0); dp = dp->ndm_list.le_next; } else if (add) { MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap), M_NFSDIROFF, M_WAITOK); dp2->ndm_eocookie = 0; LIST_INSERT_AFTER(dp, dp2, ndm_list); dp = dp2; } else return ((nfsuint64 *)0); } if (pos >= dp->ndm_eocookie) { if (add) dp->ndm_eocookie = pos + 1; else return ((nfsuint64 *)0); } return (&dp->ndm_cookies[pos]); } /* * Invalidate cached directory information, except for the actual directory * blocks (which are invalidated separately). * Done mainly to avoid the use of stale offset cookies. */ void nfs_invaldir(vp) register struct vnode *vp; { register struct nfsnode *np = VTONFS(vp); #ifdef DIAGNOSTIC if (vp->v_type != VDIR) panic("nfs: invaldir not dir"); #endif np->n_direofoffset = 0; np->n_cookieverf.nfsuquad[0] = 0; np->n_cookieverf.nfsuquad[1] = 0; if (np->n_cookies.lh_first) np->n_cookies.lh_first->ndm_eocookie = 0; } /* * The write verifier has changed (probably due to a server reboot), so all * B_NEEDCOMMIT blocks will have to be written again. Since they are on the * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT * and B_CLUSTEROK flags. Once done the new write verifier can be set for the * mount point. * * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data * writes are not clusterable. */ void nfs_clearcommit(mp) struct mount *mp; { register struct vnode *vp, *nvp; register struct buf *bp, *nbp; int s; s = splbio(); loop: for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { if (vp->v_mount != mp) /* Paranoia */ goto loop; nvp = vp->v_mntvnodes.le_next; for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { nbp = TAILQ_NEXT(bp, b_vnbufs); if (BUF_REFCNT(bp) == 0 && (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) == (B_DELWRI | B_NEEDCOMMIT)) bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); } } splx(s); } #ifndef NFS_NOSERVER /* * Map errnos to NFS error numbers. For Version 3 also filter out error * numbers not specified for the associated procedure. */ int nfsrv_errmap(nd, err) struct nfsrv_descript *nd; register int err; { register short *defaulterrp, *errp; if (nd->nd_flag & ND_NFSV3) { if (nd->nd_procnum <= NFSPROC_COMMIT) { errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; while (*++errp) { if (*errp == err) return (err); else if (*errp > err) break; } return ((int)*defaulterrp); } else return (err & 0xffff); } if (err <= ELAST) return ((int)nfsrv_v2errmap[err - 1]); return (NFSERR_IO); } int nfsrv_object_create(vp) struct vnode *vp; { if (vp == NULL || vp->v_type != VREG) return (1); return (vfs_object_create(vp, curproc, curproc ? curproc->p_ucred : NULL)); } /* * Sort the group list in increasing numerical order. * (Insertion sort by Chris Torek, who was grossed out by the bubble sort * that used to be here.) */ void nfsrvw_sort(list, num) register gid_t *list; register int num; { register int i, j; gid_t v; /* Insertion sort. */ for (i = 1; i < num; i++) { v = list[i]; /* find correct slot for value v, moving others up */ for (j = i; --j >= 0 && v < list[j];) list[j + 1] = list[j]; list[j + 1] = v; } } /* * copy credentials making sure that the result can be compared with bcmp(). */ void nfsrv_setcred(incred, outcred) register struct ucred *incred, *outcred; { register int i; bzero((caddr_t)outcred, sizeof (struct ucred)); outcred->cr_ref = 1; outcred->cr_uid = incred->cr_uid; outcred->cr_ngroups = incred->cr_ngroups; for (i = 0; i < incred->cr_ngroups; i++) outcred->cr_groups[i] = incred->cr_groups[i]; nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); } #endif /* NFS_NOSERVER */