From 23aa42f44cdf5ee9ec9bf52243ea4ad96f88d7bd Mon Sep 17 00:00:00 2001 From: "William F. Jolitz" Date: Wed, 15 Jan 1992 20:45:11 -0800 Subject: [PATCH] 386BSD 0.1 development Work on file usr/src/sys.386bsd/nfs/nfs_vnops.c Work on file usr/src/sys.386bsd/ufs/mfs_vnops.c Co-Authored-By: Lynne Greer Jolitz Synthesized-from: 386BSD-0.1 --- usr/src/sys.386bsd/nfs/nfs_vnops.c | 1735 ++++++++++++++++++++++++++++ usr/src/sys.386bsd/ufs/mfs_vnops.c | 272 +++++ 2 files changed, 2007 insertions(+) create mode 100644 usr/src/sys.386bsd/nfs/nfs_vnops.c create mode 100644 usr/src/sys.386bsd/ufs/mfs_vnops.c diff --git a/usr/src/sys.386bsd/nfs/nfs_vnops.c b/usr/src/sys.386bsd/nfs/nfs_vnops.c new file mode 100644 index 0000000000..3e94d48083 --- /dev/null +++ b/usr/src/sys.386bsd/nfs/nfs_vnops.c @@ -0,0 +1,1735 @@ +/* + * Copyright (c) 1989 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_vnops.c 7.60 (Berkeley) 5/24/91 + */ + +/* + * vnode op calls for sun nfs version 2 + */ + +#include "param.h" +#include "proc.h" +#include "kernel.h" +#include "systm.h" +#include "mount.h" +#include "buf.h" +#include "malloc.h" +#include "mbuf.h" +#include "conf.h" +#include "namei.h" +#include "vnode.h" +#include "specdev.h" +#include "fifo.h" + +#include "../ufs/quota.h" +#include "../ufs/inode.h" +#include "../ufs/dir.h" + +#include "nfsv2.h" +#include "nfs.h" +#include "nfsnode.h" +#include "nfsmount.h" +#include "xdr_subs.h" +#include "nfsm_subs.h" +#include "nfsiom.h" + +/* Defs */ +#define TRUE 1 +#define FALSE 0 + +/* + * Global vfs data structures for nfs + */ +struct vnodeops nfsv2_vnodeops = { + nfs_lookup, /* lookup */ + nfs_create, /* create */ + nfs_mknod, /* mknod */ + nfs_open, /* open */ + nfs_close, /* close */ + nfs_access, /* access */ + nfs_getattr, /* getattr */ + nfs_setattr, /* setattr */ + nfs_read, /* read */ + nfs_write, /* write */ + nfs_ioctl, /* ioctl */ + nfs_select, /* select */ + nfs_mmap, /* mmap */ + nfs_fsync, /* fsync */ + nfs_seek, /* seek */ + nfs_remove, /* remove */ + nfs_link, /* link */ + nfs_rename, /* rename */ + nfs_mkdir, /* mkdir */ + nfs_rmdir, /* rmdir */ + nfs_symlink, /* symlink */ + nfs_readdir, /* readdir */ + nfs_readlink, /* readlink */ + nfs_abortop, /* abortop */ + nfs_inactive, /* inactive */ + nfs_reclaim, /* reclaim */ + nfs_lock, /* lock */ + nfs_unlock, /* unlock */ + nfs_bmap, /* bmap */ + nfs_strategy, /* strategy */ + nfs_print, /* print */ + nfs_islocked, /* islocked */ + nfs_advlock, /* advlock */ +}; + +/* + * Special device vnode ops + */ +struct vnodeops spec_nfsv2nodeops = { + spec_lookup, /* lookup */ + spec_create, /* create */ + spec_mknod, /* mknod */ + spec_open, /* open */ + spec_close, /* close */ + nfs_access, /* access */ + nfs_getattr, /* getattr */ + nfs_setattr, /* setattr */ + spec_read, /* read */ + spec_write, /* write */ + spec_ioctl, /* ioctl */ + spec_select, /* select */ + spec_mmap, /* mmap */ + spec_fsync, /* fsync */ + spec_seek, /* seek */ + spec_remove, /* remove */ + spec_link, /* link */ + spec_rename, /* rename */ + spec_mkdir, /* mkdir */ + spec_rmdir, /* rmdir */ + spec_symlink, /* symlink */ + spec_readdir, /* readdir */ + spec_readlink, /* readlink */ + spec_abortop, /* abortop */ + nfs_inactive, /* inactive */ + nfs_reclaim, /* reclaim */ + nfs_lock, /* lock */ + nfs_unlock, /* unlock */ + spec_bmap, /* bmap */ + spec_strategy, /* strategy */ + nfs_print, /* print */ + nfs_islocked, /* islocked */ + spec_advlock, /* advlock */ +}; + +#ifdef FIFO +struct vnodeops fifo_nfsv2nodeops = { + fifo_lookup, /* lookup */ + fifo_create, /* create */ + fifo_mknod, /* mknod */ + fifo_open, /* open */ + fifo_close, /* close */ + nfs_access, /* access */ + nfs_getattr, /* getattr */ + nfs_setattr, /* setattr */ + fifo_read, /* read */ + fifo_write, /* write */ + fifo_ioctl, /* ioctl */ + fifo_select, /* select */ + fifo_mmap, /* mmap */ + fifo_fsync, /* fsync */ + fifo_seek, /* seek */ + fifo_remove, /* remove */ + fifo_link, /* link */ + fifo_rename, /* rename */ + fifo_mkdir, /* mkdir */ + fifo_rmdir, /* rmdir */ + fifo_symlink, /* symlink */ + fifo_readdir, /* readdir */ + fifo_readlink, /* readlink */ + fifo_abortop, /* abortop */ + nfs_inactive, /* inactive */ + nfs_reclaim, /* reclaim */ + nfs_lock, /* lock */ + nfs_unlock, /* unlock */ + fifo_bmap, /* bmap */ + fifo_badop, /* strategy */ + nfs_print, /* print */ + nfs_islocked, /* islocked */ + fifo_advlock, /* advlock */ +}; +#endif /* FIFO */ + +/* + * Global vars + */ +extern u_long nfs_procids[NFS_NPROCS]; +extern u_long nfs_prog, nfs_vers; +extern char nfsiobuf[MAXPHYS+NBPG]; +struct buf nfs_bqueue; /* Queue head for nfsiod's */ +struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; +int nfs_numasync = 0; + +/* + * nfs null call from vfs. + */ +nfs_null(vp, cred, p) + struct vnode *vp; + struct ucred *cred; + struct proc *p; +{ + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb; + + nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0); + nfsm_request(vp, NFSPROC_NULL, p, 0); + nfsm_reqdone; + return (error); +} + +/* + * nfs access vnode op. + * Essentially just get vattr and then imitate iaccess() + */ +nfs_access(vp, mode, cred, p) + struct vnode *vp; + int mode; + register struct ucred *cred; + struct proc *p; +{ + register struct vattr *vap; + register gid_t *gp; + struct vattr vattr; + register int i; + int error; + + /* + * If you're the super-user, + * you always get access. + */ + if (cred->cr_uid == 0) + return (0); + vap = &vattr; + if (error = nfs_dogetattr(vp, vap, cred, 0, p)) + return (error); + /* + * Access check is based on only one of owner, group, public. + * If not owner, then check group. If not a member of the + * group, then check public access. + */ + if (cred->cr_uid != vap->va_uid) { + mode >>= 3; + gp = cred->cr_groups; + for (i = 0; i < cred->cr_ngroups; i++, gp++) + if (vap->va_gid == *gp) + goto found; + mode >>= 3; +found: + ; + } + if ((vap->va_mode & mode) != 0) + return (0); + return (EACCES); +} + +/* + * nfs open vnode op + * Just check to see if the type is ok + */ +/* ARGSUSED */ +nfs_open(vp, mode, cred, p) + struct vnode *vp; + int mode; + struct ucred *cred; + struct proc *p; +{ + register enum vtype vtyp; + + vtyp = vp->v_type; + if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK) + return (0); + else + return (EACCES); +} + +/* + * nfs close vnode op + * For reg files, invalidate any buffer cache entries. + */ +/* ARGSUSED */ +nfs_close(vp, fflags, cred, p) + register struct vnode *vp; + int fflags; + struct ucred *cred; + struct proc *p; +{ + register struct nfsnode *np = VTONFS(vp); + int error = 0; + + if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) { + nfs_lock(vp); + np->n_flag &= ~NMODIFIED; + vinvalbuf(vp, TRUE); + np->n_attrstamp = 0; + if (np->n_flag & NWRITEERR) { + np->n_flag &= ~NWRITEERR; + error = np->n_error; + } + nfs_unlock(vp); + } + return (error); +} + +/* + * nfs getattr call from vfs. + */ +nfs_getattr(vp, vap, cred, p) + register struct vnode *vp; + struct vattr *vap; + struct ucred *cred; + struct proc *p; +{ + return (nfs_dogetattr(vp, vap, cred, 0, p)); +} + +nfs_dogetattr(vp, vap, cred, tryhard, p) + register struct vnode *vp; + struct vattr *vap; + struct ucred *cred; + int tryhard; + struct proc *p; +{ + register caddr_t cp; + register long t1; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + /* First look in the cache.. */ + if (nfs_getattrcache(vp, vap) == 0) + return (0); + nfsstats.rpccnt[NFSPROC_GETATTR]++; + nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH); + nfsm_fhtom(vp); + nfsm_request(vp, NFSPROC_GETATTR, p, tryhard); + nfsm_loadattr(vp, vap); + nfsm_reqdone; + return (error); +} + +/* + * nfs setattr call. + */ +nfs_setattr(vp, vap, cred, p) + register struct vnode *vp; + register struct vattr *vap; + struct ucred *cred; + struct proc *p; +{ + register struct nfsv2_sattr *sp; + register caddr_t cp; + register long t1; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct nfsnode *np; + + nfsstats.rpccnt[NFSPROC_SETATTR]++; + nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR); + nfsm_fhtom(vp); + nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); + if (vap->va_mode == 0xffff) + sp->sa_mode = VNOVAL; + else + sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode); + if (vap->va_uid == 0xffff) + sp->sa_uid = VNOVAL; + else + sp->sa_uid = txdr_unsigned(vap->va_uid); + if (vap->va_gid == 0xffff) + sp->sa_gid = VNOVAL; + else + sp->sa_gid = txdr_unsigned(vap->va_gid); + sp->sa_size = txdr_unsigned(vap->va_size); + sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); + sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags); + txdr_time(&vap->va_mtime, &sp->sa_mtime); + if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || + vap->va_atime.tv_sec != VNOVAL) { + np = VTONFS(vp); + if (np->n_flag & NMODIFIED) { + np->n_flag &= ~NMODIFIED; + if (vap->va_size == 0) + vinvalbuf(vp, FALSE); + else + vinvalbuf(vp, TRUE); + np->n_attrstamp = 0; + } + } + nfsm_request(vp, NFSPROC_SETATTR, p, 1); + nfsm_loadattr(vp, (struct vattr *)0); + /* should we fill in any vap fields ?? */ + nfsm_reqdone; + return (error); +} + +/* + * nfs lookup call, one step at a time... + * First look in cache + * If not found, unlock the directory nfsnode and do the rpc + */ +nfs_lookup(vp, ndp, p) + register struct vnode *vp; + register struct nameidata *ndp; + struct proc *p; +{ + register struct vnode *vdp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + u_long xid; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct vnode *newvp; + long len; + nfsv2fh_t *fhp; + struct nfsnode *np; + int lockparent, wantparent, flag, error = 0; + + ndp->ni_dvp = vp; + ndp->ni_vp = NULL; + if (vp->v_type != VDIR) + return (ENOTDIR); + lockparent = ndp->ni_nameiop & LOCKPARENT; + flag = ndp->ni_nameiop & OPMASK; + wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT); + if ((error = cache_lookup(ndp)) && error != ENOENT) { + struct vattr vattr; + int vpid; + + vdp = ndp->ni_vp; + vpid = vdp->v_id; + /* + * See the comment starting `Step through' in ufs/ufs_lookup.c + * for an explanation of the locking protocol + */ + if (vp == vdp) { + VREF(vdp); + error = 0; + } else if (ndp->ni_isdotdot) { + nfs_unlock(vp); + error = vget(vdp); + if (!error && lockparent && *ndp->ni_next == '\0') + nfs_lock(vp); + } else { + error = vget(vdp); + if (!lockparent || error || *ndp->ni_next != '\0') + nfs_unlock(vp); + } + if (!error) { + if (vpid == vdp->v_id) { + if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0, p)&& + vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) { + nfsstats.lookupcache_hits++; + if (flag != LOOKUP && *ndp->ni_next == 0) + ndp->ni_nameiop |= SAVENAME; + return (0); + } + cache_purge(vdp); + } + nfs_nput(vdp); + if (lockparent && vdp != vp && *ndp->ni_next == '\0') + nfs_unlock(vp); + } + ndp->ni_vp = NULLVP; + } else + nfs_unlock(vp); + error = 0; + nfsstats.lookupcache_misses++; + nfsstats.rpccnt[NFSPROC_LOOKUP]++; + len = ndp->ni_namelen; + nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); + nfsm_fhtom(vp); + nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); + nfsm_request(vp, NFSPROC_LOOKUP, p, 0); +nfsmout: + if (error) { + if (lockparent || (flag != CREATE && flag != RENAME) || + *ndp->ni_next != 0) + nfs_lock(vp); + if (flag != LOOKUP && *ndp->ni_next == 0) + ndp->ni_nameiop |= SAVENAME; + return (error); + } + nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); + + /* + * Handle DELETE and RENAME cases... + */ + if (flag == DELETE && *ndp->ni_next == 0) { + if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { + VREF(vp); + newvp = vp; + np = VTONFS(vp); + } else { + if (error = nfs_nget(vp->v_mount, fhp, &np)) { + nfs_lock(vp); + m_freem(mrep); + return (error); + } + newvp = NFSTOV(np); + } + if (error = + nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { + nfs_lock(vp); + if (newvp != vp) + nfs_nput(newvp); + else + vrele(vp); + m_freem(mrep); + return (error); + } + ndp->ni_vp = newvp; + if (lockparent || vp == newvp) + nfs_lock(vp); + m_freem(mrep); + ndp->ni_nameiop |= SAVENAME; + return (0); + } + + if (flag == RENAME && wantparent && *ndp->ni_next == 0) { + if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { + nfs_lock(vp); + m_freem(mrep); + return (EISDIR); + } + if (error = nfs_nget(vp->v_mount, fhp, &np)) { + nfs_lock(vp); + m_freem(mrep); + return (error); + } + newvp = NFSTOV(np); + if (error = + nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { + nfs_lock(vp); + nfs_nput(newvp); + m_freem(mrep); + return (error); + } + ndp->ni_vp = newvp; + if (lockparent) + nfs_lock(vp); + m_freem(mrep); + ndp->ni_nameiop |= SAVENAME; + return (0); + } + + if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) { + VREF(vp); + newvp = vp; + np = VTONFS(vp); + } else if (ndp->ni_isdotdot) { + if (error = nfs_nget(vp->v_mount, fhp, &np)) { + nfs_lock(vp); + m_freem(mrep); + return (error); + } + newvp = NFSTOV(np); + } else { + if (error = nfs_nget(vp->v_mount, fhp, &np)) { + nfs_lock(vp); + m_freem(mrep); + return (error); + } + newvp = NFSTOV(np); + } + if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) { + nfs_lock(vp); + if (newvp != vp) + nfs_nput(newvp); + else + vrele(vp); + m_freem(mrep); + return (error); + } + m_freem(mrep); + + if (vp == newvp || (lockparent && *ndp->ni_next == '\0')) + nfs_lock(vp); + ndp->ni_vp = newvp; + if (flag != LOOKUP && *ndp->ni_next == 0) + ndp->ni_nameiop |= SAVENAME; + if (error == 0 && ndp->ni_makeentry) { + np->n_ctime = np->n_vattr.va_ctime.tv_sec; + cache_enter(ndp); + } + return (error); +} + +/* + * nfs read call. + * Just call nfs_bioread() to do the work. + */ +nfs_read(vp, uiop, ioflag, cred) + register struct vnode *vp; + struct uio *uiop; + int ioflag; + struct ucred *cred; +{ + if (vp->v_type != VREG) + return (EPERM); + return (nfs_bioread(vp, uiop, ioflag, cred)); +} + +/* + * nfs readlink call + */ +nfs_readlink(vp, uiop, cred) + struct vnode *vp; + struct uio *uiop; + struct ucred *cred; +{ + if (vp->v_type != VLNK) + return (EPERM); + return (nfs_bioread(vp, uiop, 0, cred)); +} + +/* + * Do a readlink rpc. + * Called by nfs_doio() from below the buffer cache. + */ +nfs_readlinkrpc(vp, uiop, cred) + register struct vnode *vp; + struct uio *uiop; + struct ucred *cred; +{ + register u_long *tl; + register caddr_t cp; + register long t1; + caddr_t bpos, dpos, cp2; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + long len; + + nfsstats.rpccnt[NFSPROC_READLINK]++; + nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH); + nfsm_fhtom(vp); + nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, 0); + nfsm_strsiz(len, NFS_MAXPATHLEN); + nfsm_mtouio(uiop, len); + nfsm_reqdone; + return (error); +} + +/* + * nfs read rpc call + * Ditto above + */ +nfs_readrpc(vp, uiop, cred) + register struct vnode *vp; + struct uio *uiop; + struct ucred *cred; +{ + register u_long *tl; + register caddr_t cp; + register long t1; + caddr_t bpos, dpos, cp2; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct nfsmount *nmp; + long len, retlen, tsiz; + + nmp = VFSTONFS(vp->v_mount); + tsiz = uiop->uio_resid; + while (tsiz > 0) { + nfsstats.rpccnt[NFSPROC_READ]++; + len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; + nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3); + nfsm_fhtom(vp); + nfsm_build(tl, u_long *, NFSX_UNSIGNED*3); + *tl++ = txdr_unsigned(uiop->uio_offset); + *tl++ = txdr_unsigned(len); + *tl = 0; + nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1); + nfsm_loadattr(vp, (struct vattr *)0); + nfsm_strsiz(retlen, nmp->nm_rsize); + nfsm_mtouio(uiop, retlen); + m_freem(mrep); + if (retlen < len) + tsiz = 0; + else + tsiz -= len; + } +nfsmout: + return (error); +} + +/* + * nfs write call + */ +nfs_writerpc(vp, uiop, cred) + register struct vnode *vp; + struct uio *uiop; + struct ucred *cred; +{ + register u_long *tl; + register caddr_t cp; + register long t1; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct nfsmount *nmp; + long len, tsiz; + + nmp = VFSTONFS(vp->v_mount); + tsiz = uiop->uio_resid; + while (tsiz > 0) { + nfsstats.rpccnt[NFSPROC_WRITE]++; + len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; + nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred, + NFSX_FH+NFSX_UNSIGNED*4); + nfsm_fhtom(vp); + nfsm_build(tl, u_long *, NFSX_UNSIGNED*4); + *(tl+1) = txdr_unsigned(uiop->uio_offset); + *(tl+3) = txdr_unsigned(len); + nfsm_uiotom(uiop, len); + nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1); + nfsm_loadattr(vp, (struct vattr *)0); + m_freem(mrep); + tsiz -= len; + } +nfsmout: + return (error); +} + +/* + * nfs mknod call + * This is a kludge. Use a create rpc but with the IFMT bits of the mode + * set to specify the file type and the size field for rdev. + */ +/* ARGSUSED */ +nfs_mknod(ndp, vap, cred, p) + struct nameidata *ndp; + struct ucred *cred; + register struct vattr *vap; + struct proc *p; +{ + register struct nfsv2_sattr *sp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + u_long rdev; + + if (vap->va_type == VCHR || vap->va_type == VBLK) + rdev = txdr_unsigned(vap->va_rdev); +#ifdef FIFO + else if (vap->va_type == VFIFO) + rdev = 0xffffffff; +#endif /* FIFO */ + else { + VOP_ABORTOP(ndp); + vput(ndp->ni_dvp); + return (EOPNOTSUPP); + } + nfsstats.rpccnt[NFSPROC_CREATE]++; + nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, + NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR); + nfsm_fhtom(ndp->ni_dvp); + nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); + nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); + sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); + sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); + sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); + sp->sa_size = rdev; + /* or should these be VNOVAL ?? */ + txdr_time(&vap->va_atime, &sp->sa_atime); + txdr_time(&vap->va_mtime, &sp->sa_mtime); + nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1); + nfsm_reqdone; + FREE(ndp->ni_pnbuf, M_NAMEI); + VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; + nfs_nput(ndp->ni_dvp); + return (error); +} + +/* + * nfs file create call + */ +nfs_create(ndp, vap, p) + register struct nameidata *ndp; + register struct vattr *vap; + struct proc *p; +{ + register struct nfsv2_sattr *sp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + nfsstats.rpccnt[NFSPROC_CREATE]++; + nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred, + NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR); + nfsm_fhtom(ndp->ni_dvp); + nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); + nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); + sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode); + sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); + sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); + sp->sa_size = txdr_unsigned(0); + /* or should these be VNOVAL ?? */ + txdr_time(&vap->va_atime, &sp->sa_atime); + txdr_time(&vap->va_mtime, &sp->sa_mtime); + nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1); + nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); + nfsm_reqdone; + FREE(ndp->ni_pnbuf, M_NAMEI); + VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; + nfs_nput(ndp->ni_dvp); + return (error); +} + +/* + * nfs file remove call + * To try and make nfs semantics closer to ufs semantics, a file that has + * other processes using the vnode is renamed instead of removed and then + * removed later on the last close. + * - If v_usecount > 1 + * If a rename is not already in the works + * call nfs_sillyrename() to set it up + * else + * do the remove rpc + */ +nfs_remove(ndp, p) + register struct nameidata *ndp; + struct proc *p; +{ + register struct vnode *vp = ndp->ni_vp; + register struct nfsnode *np = VTONFS(ndp->ni_vp); + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + if (vp->v_usecount > 1) { + if (!np->n_sillyrename) + error = nfs_sillyrename(ndp, p); + } else { + nfsstats.rpccnt[NFSPROC_REMOVE]++; + nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred, + NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); + nfsm_fhtom(ndp->ni_dvp); + nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); + nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, p, 1); + nfsm_reqdone; + FREE(ndp->ni_pnbuf, M_NAMEI); + VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; + /* + * Kludge City: If the first reply to the remove rpc is lost.. + * the reply to the retransmitted request will be ENOENT + * since the file was in fact removed + * Therefore, we cheat and return success. + */ + if (error == ENOENT) + error = 0; + } + np->n_attrstamp = 0; + if (ndp->ni_dvp == vp) + vrele(vp); + else + nfs_nput(ndp->ni_dvp); + nfs_nput(vp); + return (error); +} + +/* + * nfs file remove rpc called from nfs_inactive + */ +nfs_removeit(sp, p) + register struct sillyrename *sp; + struct proc *p; +{ + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + nfsstats.rpccnt[NFSPROC_REMOVE]++; + nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], sp->s_cred, + NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(sp->s_namlen)); + nfsm_fhtom(sp->s_dvp); + nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); + nfsm_request(sp->s_dvp, NFSPROC_REMOVE, p, 1); + nfsm_reqdone; + VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; + return (error); +} + +/* + * nfs file rename call + */ +nfs_rename(sndp, tndp, p) + register struct nameidata *sndp, *tndp; + struct proc *p; +{ + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + nfsstats.rpccnt[NFSPROC_RENAME]++; + nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred, + (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) + + nfsm_rndup(tndp->ni_namelen)); /* or sndp->ni_cred?*/ + nfsm_fhtom(sndp->ni_dvp); + nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN); + nfsm_fhtom(tndp->ni_dvp); + nfsm_strtom(tndp->ni_ptr, tndp->ni_namelen, NFS_MAXNAMLEN); + nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1); + nfsm_reqdone; + VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; + VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED; + if (sndp->ni_vp->v_type == VDIR) { + if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR) + cache_purge(tndp->ni_dvp); + cache_purge(sndp->ni_dvp); + } + if (tndp->ni_dvp == tndp->ni_vp) + vrele(tndp->ni_dvp); + else + vput(tndp->ni_dvp); + if (tndp->ni_vp) + vput(tndp->ni_vp); + vrele(sndp->ni_dvp); + vrele(sndp->ni_vp); + /* + * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. + */ + if (error == ENOENT) + error = 0; + return (error); +} + +/* + * nfs file rename rpc called from nfs_remove() above + */ +nfs_renameit(sndp, sp, p) + register struct nameidata *sndp; + register struct sillyrename *sp; + struct proc *p; +{ + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + nfsstats.rpccnt[NFSPROC_RENAME]++; + nfsm_reqhead(nfs_procids[NFSPROC_RENAME], sp->s_cred, + (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) + + nfsm_rndup(sp->s_namlen)); /* or sndp->ni_cred?*/ + nfsm_fhtom(sndp->ni_dvp); + nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN); + nfsm_fhtom(sp->s_dvp); + nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN); + nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1); + nfsm_reqdone; + FREE(sndp->ni_pnbuf, M_NAMEI); + VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED; + VTONFS(sp->s_dvp)->n_flag |= NMODIFIED; + return (error); +} + +/* + * nfs hard link create call + */ +nfs_link(vp, ndp, p) + register struct vnode *vp; + register struct nameidata *ndp; + struct proc *p; +{ + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + if (ndp->ni_dvp != vp) + nfs_lock(vp); + nfsstats.rpccnt[NFSPROC_LINK]++; + nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred, + NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); + nfsm_fhtom(vp); + nfsm_fhtom(ndp->ni_dvp); + nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); + nfsm_request(vp, NFSPROC_LINK, p, 1); + nfsm_reqdone; + FREE(ndp->ni_pnbuf, M_NAMEI); + VTONFS(vp)->n_attrstamp = 0; + VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; + if (ndp->ni_dvp != vp) + nfs_unlock(vp); + nfs_nput(ndp->ni_dvp); + /* + * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. + */ + if (error == EEXIST) + error = 0; + return (error); +} + +/* + * nfs symbolic link create call + */ +nfs_symlink(ndp, vap, nm, p) + struct nameidata *ndp; + struct vattr *vap; + char *nm; /* is this the path ?? */ + struct proc *p; +{ + register struct nfsv2_sattr *sp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + nfsstats.rpccnt[NFSPROC_SYMLINK]++; + nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred, + NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_UNSIGNED); + nfsm_fhtom(ndp->ni_dvp); + nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); + nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN); + nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); + sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode); + sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); + sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); + sp->sa_size = txdr_unsigned(VNOVAL); + txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ + txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ + nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, p, 1); + nfsm_reqdone; + FREE(ndp->ni_pnbuf, M_NAMEI); + VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; + nfs_nput(ndp->ni_dvp); + /* + * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. + */ + if (error == EEXIST) + error = 0; + return (error); +} + +/* + * nfs make dir call + */ +nfs_mkdir(ndp, vap, p) + register struct nameidata *ndp; + struct vattr *vap; + struct proc *p; +{ + register struct nfsv2_sattr *sp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + register int len; + caddr_t bpos, dpos, cp2; + u_long xid; + int error = 0, firsttry = 1; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + len = ndp->ni_namelen; + nfsstats.rpccnt[NFSPROC_MKDIR]++; + nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred, + NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR); + nfsm_fhtom(ndp->ni_dvp); + nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); + nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR); + sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode); + sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid); + sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid); + sp->sa_size = txdr_unsigned(VNOVAL); + txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */ + txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */ + nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, p, 1); + nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); + nfsm_reqdone; + VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; + /* + * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry + * if we can succeed in looking up the directory. + * "firsttry" is necessary since the macros may "goto nfsmout" which + * is above the if on errors. (Ugh) + */ + if (error == EEXIST && firsttry) { + firsttry = 0; + error = 0; + nfsstats.rpccnt[NFSPROC_LOOKUP]++; + ndp->ni_vp = NULL; + nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, + NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); + nfsm_fhtom(ndp->ni_dvp); + nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN); + nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, p, 1); + nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp); + if (ndp->ni_vp->v_type != VDIR) { + vput(ndp->ni_vp); + error = EEXIST; + } + m_freem(mrep); + } + FREE(ndp->ni_pnbuf, M_NAMEI); + nfs_nput(ndp->ni_dvp); + return (error); +} + +/* + * nfs remove directory call + */ +nfs_rmdir(ndp, p) + register struct nameidata *ndp; + struct proc *p; +{ + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + if (ndp->ni_dvp == ndp->ni_vp) { + vrele(ndp->ni_dvp); + nfs_nput(ndp->ni_dvp); + return (EINVAL); + } + nfsstats.rpccnt[NFSPROC_RMDIR]++; + nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred, + NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)); + nfsm_fhtom(ndp->ni_dvp); + nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN); + nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, p, 1); + nfsm_reqdone; + FREE(ndp->ni_pnbuf, M_NAMEI); + VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED; + cache_purge(ndp->ni_dvp); + cache_purge(ndp->ni_vp); + nfs_nput(ndp->ni_vp); + nfs_nput(ndp->ni_dvp); + /* + * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. + */ + if (error == ENOENT) + error = 0; + return (error); +} + +/* + * nfs readdir call + * Although cookie is defined as opaque, I translate it to/from net byte + * order so that it looks more sensible. This appears consistent with the + * Ultrix implementation of NFS. + */ +nfs_readdir(vp, uiop, cred, eofflagp) + register struct vnode *vp; + struct uio *uiop; + struct ucred *cred; + int *eofflagp; +{ + register struct nfsnode *np = VTONFS(vp); + int tresid, error; + struct vattr vattr; + + if (vp->v_type != VDIR) + return (EPERM); + /* + * First, check for hit on the EOF offset cache + */ + if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset && + (np->n_flag & NMODIFIED) == 0 && + nfs_dogetattr(vp, &vattr, cred, 0, uiop->uio_procp) == 0 && + np->n_mtime == vattr.va_mtime.tv_sec) { + *eofflagp = 1; + nfsstats.direofcache_hits++; + return (0); + } + + /* + * Call nfs_bioread() to do the real work. + */ + tresid = uiop->uio_resid; + error = nfs_bioread(vp, uiop, 0, cred); + + if (!error && uiop->uio_resid == tresid) { + *eofflagp = 1; + nfsstats.direofcache_misses++; + } else + *eofflagp = 0; + return (error); +} + +/* + * Readdir rpc call. + * Called from below the buffer cache by nfs_doio(). + */ +nfs_readdirrpc(vp, uiop, cred) + register struct vnode *vp; + struct uio *uiop; + struct ucred *cred; +{ + register long len; + register struct direct *dp; + register u_long *tl; + register caddr_t cp; + register long t1; + long tlen, lastlen; + caddr_t bpos, dpos, cp2; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct mbuf *md2; + caddr_t dpos2; + int siz; + int more_dirs = 1; + off_t off, savoff; + struct direct *savdp; + struct nfsmount *nmp; + struct nfsnode *np = VTONFS(vp); + long tresid; + + nmp = VFSTONFS(vp->v_mount); + tresid = uiop->uio_resid; + /* + * Loop around doing readdir rpc's of size uio_resid or nm_rsize, + * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ. + * The stopping criteria is EOF or buffer full. + */ + while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) { + nfsstats.rpccnt[NFSPROC_READDIR]++; + nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid); + nfsm_fhtom(vp); + nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); + *tl++ = txdr_unsigned(uiop->uio_offset); + *tl = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ? + nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1)); + nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, 0); + siz = 0; + nfsm_disect(tl, u_long *, NFSX_UNSIGNED); + more_dirs = fxdr_unsigned(int, *tl); + + /* Save the position so that we can do nfsm_mtouio() later */ + dpos2 = dpos; + md2 = md; + + /* loop thru the dir entries, doctoring them to 4bsd form */ + off = uiop->uio_offset; +#ifdef lint + dp = (struct direct *)0; +#endif /* lint */ + while (more_dirs && siz < uiop->uio_resid) { + savoff = off; /* Hold onto offset and dp */ + savdp = dp; + nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED); + dp = (struct direct *)tl; + dp->d_ino = fxdr_unsigned(u_long, *tl++); + len = fxdr_unsigned(int, *tl); + if (len <= 0 || len > NFS_MAXNAMLEN) { + error = EBADRPC; + m_freem(mrep); + goto nfsmout; + } + dp->d_namlen = (u_short)len; + nfsm_adv(len); /* Point past name */ + tlen = nfsm_rndup(len); + /* + * This should not be necessary, but some servers have + * broken XDR such that these bytes are not null filled. + */ + if (tlen != len) { + *dpos = '\0'; /* Null-terminate */ + nfsm_adv(tlen - len); + len = tlen; + } + nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED); + off = fxdr_unsigned(off_t, *tl); + *tl++ = 0; /* Ensures null termination of name */ + more_dirs = fxdr_unsigned(int, *tl); + dp->d_reclen = len+4*NFSX_UNSIGNED; + siz += dp->d_reclen; + } + /* + * If at end of rpc data, get the eof boolean + */ + if (!more_dirs) { + nfsm_disecton(tl, u_long *, NFSX_UNSIGNED); + more_dirs = (fxdr_unsigned(int, *tl) == 0); + + /* + * If at EOF, cache directory offset + */ + if (!more_dirs) + np->n_direofoffset = off; + } + /* + * If there is too much to fit in the data buffer, use savoff and + * savdp to trim off the last record. + * --> we are not at eof + */ + if (siz > uiop->uio_resid) { + off = savoff; + siz -= dp->d_reclen; + dp = savdp; + more_dirs = 0; /* Paranoia */ + } + if (siz > 0) { + lastlen = dp->d_reclen; + md = md2; + dpos = dpos2; + nfsm_mtouio(uiop, siz); + uiop->uio_offset = off; + } else + more_dirs = 0; /* Ugh, never happens, but in case.. */ + m_freem(mrep); + } + /* + * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ + * by increasing d_reclen for the last record. + */ + if (uiop->uio_resid < tresid) { + len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1); + if (len > 0) { + dp = (struct direct *) + (uiop->uio_iov->iov_base - lastlen); + dp->d_reclen += len; + uiop->uio_iov->iov_base += len; + uiop->uio_iov->iov_len -= len; + uiop->uio_resid -= len; + } + } +nfsmout: + return (error); +} + +static char hextoasc[] = "0123456789abcdef"; + +/* + * Silly rename. To make the NFS filesystem that is stateless look a little + * more like the "ufs" a remove of an active vnode is translated to a rename + * to a funny looking filename that is removed by nfs_inactive on the + * nfsnode. There is the potential for another process on a different client + * to create the same funny name between the nfs_lookitup() fails and the + * nfs_rename() completes, but... + */ +nfs_sillyrename(ndp, p) + register struct nameidata *ndp; + struct proc *p; +{ + register struct nfsnode *np; + register struct sillyrename *sp; + int error; + short pid; + + np = VTONFS(ndp->ni_dvp); + cache_purge(ndp->ni_dvp); + MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), + M_NFSREQ, M_WAITOK); + bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH); + np = VTONFS(ndp->ni_vp); + sp->s_cred = crdup(ndp->ni_cred); + sp->s_dvp = ndp->ni_dvp; + VREF(sp->s_dvp); + + /* Fudge together a funny name */ + pid = p->p_pid; + bcopy(".nfsAxxxx4.4", sp->s_name, 13); + sp->s_namlen = 12; + sp->s_name[8] = hextoasc[pid & 0xf]; + sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; + sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; + sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; + + /* Try lookitups until we get one that isn't there */ + while (nfs_lookitup(sp, (nfsv2fh_t *)0, p) == 0) { + sp->s_name[4]++; + if (sp->s_name[4] > 'z') { + error = EINVAL; + goto bad; + } + } + if (error = nfs_renameit(ndp, sp, p)) + goto bad; + nfs_lookitup(sp, &np->n_fh, p); + np->n_sillyrename = sp; + return (0); +bad: + vrele(sp->s_dvp); + crfree(sp->s_cred); + free((caddr_t)sp, M_NFSREQ); + return (error); +} + +/* + * Look up a file name for silly rename stuff. + * Just like nfs_lookup() except that it doesn't load returned values + * into the nfsnode table. + * If fhp != NULL it copies the returned file handle out + */ +nfs_lookitup(sp, fhp, p) + register struct sillyrename *sp; + nfsv2fh_t *fhp; + struct proc *p; +{ + register struct vnode *vp = sp->s_dvp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + u_long xid; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + long len; + + nfsstats.rpccnt[NFSPROC_LOOKUP]++; + len = sp->s_namlen; + nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], sp->s_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)); + nfsm_fhtom(vp); + nfsm_strtom(sp->s_name, len, NFS_MAXNAMLEN); + nfsm_request(vp, NFSPROC_LOOKUP, p, 1); + if (fhp != NULL) { + nfsm_disect(cp, caddr_t, NFSX_FH); + bcopy(cp, (caddr_t)fhp, NFSX_FH); + } + nfsm_reqdone; + return (error); +} + +/* + * Kludge City.. + * - make nfs_bmap() essentially a no-op that does no translation + * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc + * after mapping the physical addresses into Kernel Virtual space in the + * nfsiobuf area. + * (Maybe I could use the process's page mapping, but I was concerned that + * Kernel Write might not be enabled and also figured copyout() would do + * a lot more work than bcopy() and also it currently happens in the + * context of the swapper process (2). + */ +nfs_bmap(vp, bn, vpp, bnp) + struct vnode *vp; + daddr_t bn; + struct vnode **vpp; + daddr_t *bnp; +{ + if (vpp != NULL) + *vpp = vp; + if (bnp != NULL) + *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize); + return (0); +} + +/* + * Strategy routine for phys. i/o + * If the biod's are running, queue a request + * otherwise just call nfs_doio() to get it done + */ +nfs_strategy(bp) + register struct buf *bp; +{ + register struct buf *dp; + register int i; + int error = 0; + int fnd = 0; + + /* + * Set b_proc. It seems a bit silly to do it here, but since bread() + * doesn't set it, I will. + * Set b_proc == NULL for asynchronous ops, since these may still + * be hanging about after the process terminates. + */ + if ((bp->b_flags & B_PHYS) == 0) { + if (bp->b_flags & B_ASYNC) + bp->b_proc = (struct proc *)0; + else + bp->b_proc = curproc; + } + /* + * If the op is asynchronous and an i/o daemon is waiting + * queue the request, wake it up and wait for completion + * otherwise just do it ourselves. + */ + if ((bp->b_flags & B_ASYNC) == 0 || nfs_numasync == 0) + return (nfs_doio(bp)); + for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { + if (nfs_iodwant[i]) { + dp = &nfs_bqueue; + if (dp->b_actf == NULL) { + dp->b_actl = bp; + bp->b_actf = dp; + } else { + dp->b_actf->b_actl = bp; + bp->b_actf = dp->b_actf; + } + dp->b_actf = bp; + bp->b_actl = dp; + fnd++; + wakeup((caddr_t)&nfs_iodwant[i]); + break; + } + } + if (!fnd) + error = nfs_doio(bp); + return (error); +} + +/* + * Fun and games with i/o + * Essentially play ubasetup() and disk interrupt service routine by + * mapping the data buffer into kernel virtual space and doing the + * nfs read or write rpc's from it. + * If the nfsiod's are not running, this is just called from nfs_strategy(), + * otherwise it is called by the nfsiods to do what would normally be + * partially disk interrupt driven. + */ +nfs_doio(bp) + register struct buf *bp; +{ + register struct uio *uiop; + register struct vnode *vp; + struct nfsnode *np; + struct ucred *cr; + int error; + struct uio uio; + struct iovec io; +#if !defined(hp300) && !defined(i386) + register struct pte *pte, *ppte; + register caddr_t vaddr; + int npf, npf2; + int reg, o; + caddr_t vbase; + unsigned v; +#endif + + vp = bp->b_vp; + np = VTONFS(vp); + uiop = &uio; + uiop->uio_iov = &io; + uiop->uio_iovcnt = 1; + uiop->uio_segflg = UIO_SYSSPACE; + uiop->uio_procp = (struct proc *)0; + + /* + * For phys i/o, map the b_addr into kernel virtual space using + * the Nfsiomap pte's + * Also, add a temporary b_rcred for reading using the process's uid + * and a guess at a group + */ + if (bp->b_flags & B_PHYS) { + if (bp->b_flags & B_DIRTY) + uiop->uio_procp = pageproc; + cr = crcopy(uiop->uio_procp->p_ucred); + /* mapping was already done by vmapbuf */ + io.iov_base = bp->b_un.b_addr; + + /* + * And do the i/o rpc + */ + io.iov_len = uiop->uio_resid = bp->b_bcount; + uiop->uio_offset = bp->b_blkno * DEV_BSIZE; + if (bp->b_flags & B_READ) { + uiop->uio_rw = UIO_READ; + nfsstats.read_physios++; + bp->b_error = error = nfs_readrpc(vp, uiop, cr); + (void) vnode_pager_uncache(vp); + } else { + uiop->uio_rw = UIO_WRITE; + nfsstats.write_physios++; + bp->b_error = error = nfs_writerpc(vp, uiop, cr); + } + + /* + * Finally, release pte's used by physical i/o + */ + crfree(cr); + } else { + if (bp->b_flags & B_READ) { + io.iov_len = uiop->uio_resid = bp->b_bcount; + io.iov_base = bp->b_un.b_addr; + uiop->uio_rw = UIO_READ; + switch (vp->v_type) { + case VREG: + uiop->uio_offset = bp->b_blkno * DEV_BSIZE; + nfsstats.read_bios++; + error = nfs_readrpc(vp, uiop, bp->b_rcred); + break; + case VLNK: + uiop->uio_offset = 0; + nfsstats.readlink_bios++; + error = nfs_readlinkrpc(vp, uiop, bp->b_rcred); + break; + case VDIR: + uiop->uio_offset = bp->b_lblkno; + nfsstats.readdir_bios++; + error = nfs_readdirrpc(vp, uiop, bp->b_rcred); + /* + * Save offset cookie in b_blkno. + */ + bp->b_blkno = uiop->uio_offset; + break; + }; + bp->b_error = error; + } else { + io.iov_len = uiop->uio_resid = bp->b_dirtyend + - bp->b_dirtyoff; + uiop->uio_offset = (bp->b_blkno * DEV_BSIZE) + + bp->b_dirtyoff; + io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff; + uiop->uio_rw = UIO_WRITE; + nfsstats.write_bios++; + bp->b_error = error = nfs_writerpc(vp, uiop, + bp->b_wcred); + if (error) { + np->n_error = error; + np->n_flag |= NWRITEERR; + } + bp->b_dirtyoff = bp->b_dirtyend = 0; + } + } + if (error) + bp->b_flags |= B_ERROR; + bp->b_resid = uiop->uio_resid; + biodone(bp); + return (error); +} + +/* + * Mmap a file + * + * NB Currently unsupported. + */ +/* ARGSUSED */ +nfs_mmap(vp, fflags, cred, p) + struct vnode *vp; + int fflags; + struct ucred *cred; + struct proc *p; +{ + + return (EINVAL); +} + +/* + * Flush all the blocks associated with a vnode. + * Walk through the buffer pool and push any dirty pages + * associated with the vnode. + */ +/* ARGSUSED */ +nfs_fsync(vp, fflags, cred, waitfor, p) + register struct vnode *vp; + int fflags; + struct ucred *cred; + int waitfor; + struct proc *p; +{ + register struct nfsnode *np = VTONFS(vp); + int error = 0; + + if (np->n_flag & NMODIFIED) { + np->n_flag &= ~NMODIFIED; + vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0); + } + if (!error && (np->n_flag & NWRITEERR)) + error = np->n_error; + return (error); +} + +/* + * NFS advisory byte-level locks. + * Currently unsupported. + */ +nfs_advlock(vp, id, op, fl, flags) + struct vnode *vp; + caddr_t id; + int op; + struct flock *fl; + int flags; +{ + + return (EOPNOTSUPP); +} + +/* + * Print out the contents of an nfsnode. + */ +nfs_print(vp) + struct vnode *vp; +{ + register struct nfsnode *np = VTONFS(vp); + + printf("tag VT_NFS, fileid %d fsid 0x%x", + np->n_vattr.va_fileid, np->n_vattr.va_fsid); +#ifdef FIFO + if (vp->v_type == VFIFO) + fifo_printinfo(vp); +#endif /* FIFO */ + printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : ""); + if (np->n_lockholder == 0) + return; + printf("\towner pid %d", np->n_lockholder); + if (np->n_lockwaiter) + printf(" waiting pid %d", np->n_lockwaiter); + printf("\n"); +} diff --git a/usr/src/sys.386bsd/ufs/mfs_vnops.c b/usr/src/sys.386bsd/ufs/mfs_vnops.c new file mode 100644 index 0000000000..dfbdf659ef --- /dev/null +++ b/usr/src/sys.386bsd/ufs/mfs_vnops.c @@ -0,0 +1,272 @@ +/* + * Copyright (c) 1989 The Regents of the University of California. + * All rights reserved. + * + * 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. + * + * @(#)mfs_vnops.c 7.22 (Berkeley) 4/16/91 + */ + +#include "param.h" +#include "systm.h" +#include "time.h" +#include "kernel.h" +#include "proc.h" +#include "buf.h" +#include "vnode.h" + +#include "mfsnode.h" +#include "mfsiom.h" + +#include "machine/vmparam.h" + +/* + * mfs vnode operations. + */ +struct vnodeops mfs_vnodeops = { + mfs_lookup, /* lookup */ + mfs_create, /* create */ + mfs_mknod, /* mknod */ + mfs_open, /* open */ + mfs_close, /* close */ + mfs_access, /* access */ + mfs_getattr, /* getattr */ + mfs_setattr, /* setattr */ + mfs_read, /* read */ + mfs_write, /* write */ + mfs_ioctl, /* ioctl */ + mfs_select, /* select */ + mfs_mmap, /* mmap */ + mfs_fsync, /* fsync */ + mfs_seek, /* seek */ + mfs_remove, /* remove */ + mfs_link, /* link */ + mfs_rename, /* rename */ + mfs_mkdir, /* mkdir */ + mfs_rmdir, /* rmdir */ + mfs_symlink, /* symlink */ + mfs_readdir, /* readdir */ + mfs_readlink, /* readlink */ + mfs_abortop, /* abortop */ + mfs_inactive, /* inactive */ + mfs_reclaim, /* reclaim */ + mfs_lock, /* lock */ + mfs_unlock, /* unlock */ + mfs_bmap, /* bmap */ + mfs_strategy, /* strategy */ + mfs_print, /* print */ + mfs_islocked, /* islocked */ + mfs_advlock, /* advlock */ +}; + +/* + * Vnode Operations. + * + * Open called to allow memory filesystem to initialize and + * validate before actual IO. Record our process identifier + * so we can tell when we are doing I/O to ourself. + */ +/* ARGSUSED */ +mfs_open(vp, mode, cred, p) + register struct vnode *vp; + int mode; + struct ucred *cred; + struct proc *p; +{ + + if (vp->v_type != VBLK) { + panic("mfs_ioctl not VBLK"); + /* NOTREACHED */ + } + return (0); +} + +/* + * Ioctl operation. + */ +/* ARGSUSED */ +mfs_ioctl(vp, com, data, fflag, cred, p) + struct vnode *vp; + int com; + caddr_t data; + int fflag; + struct ucred *cred; + struct proc *p; +{ + + return (-1); +} + +/* + * Pass I/O requests to the memory filesystem process. + */ +mfs_strategy(bp) + register struct buf *bp; +{ + register struct mfsnode *mfsp; + struct vnode *vp; + struct proc *p = curproc; /* XXX */ + + if (vfinddev(bp->b_dev, VBLK, &vp) || vp->v_usecount == 0) + panic("mfs_strategy: bad dev"); + mfsp = VTOMFS(vp); + if (mfsp->mfs_pid == p->p_pid) { + mfs_doio(bp, mfsp->mfs_baseoff); + } else { + bp->av_forw = mfsp->mfs_buflist; + mfsp->mfs_buflist = bp; + wakeup((caddr_t)vp); + } + return (0); +} + +/* + * Memory file system I/O. + * + * Trivial since buffer has already been mapping into KVA space. + */ +mfs_doio(bp, base) + register struct buf *bp; + caddr_t base; +{ + base += (bp->b_blkno << DEV_BSHIFT); + if (bp->b_flags & B_READ) + bp->b_error = copyin(base, bp->b_un.b_addr, bp->b_bcount); + else + bp->b_error = copyout(bp->b_un.b_addr, base, bp->b_bcount); + if (bp->b_error) + bp->b_flags |= B_ERROR; + biodone(bp); +} + +/* + * This is a noop, simply returning what one has been given. + */ +mfs_bmap(vp, bn, vpp, bnp) + struct vnode *vp; + daddr_t bn; + struct vnode **vpp; + daddr_t *bnp; +{ + + if (vpp != NULL) + *vpp = vp; + if (bnp != NULL) + *bnp = bn; + return (0); +} + +/* + * Memory filesystem close routine + */ +/* ARGSUSED */ +mfs_close(vp, flag, cred, p) + register struct vnode *vp; + int flag; + struct ucred *cred; + struct proc *p; +{ + register struct mfsnode *mfsp = VTOMFS(vp); + register struct buf *bp; + + /* + * Finish any pending I/O requests. + */ + while (bp = mfsp->mfs_buflist) { + mfsp->mfs_buflist = bp->av_forw; + mfs_doio(bp, mfsp->mfs_baseoff); + wakeup((caddr_t)bp); + } + /* + * On last close of a memory filesystem + * we must invalidate any in core blocks, so that + * we can, free up its vnode. + */ + vflushbuf(vp, 0); + if (vinvalbuf(vp, 1)) + return (0); + /* + * There should be no way to have any more uses of this + * vnode, so if we find any other uses, it is a panic. + */ + if (vp->v_usecount > 1) + printf("mfs_close: ref count %d > 1\n", vp->v_usecount); + if (vp->v_usecount > 1 || mfsp->mfs_buflist) + panic("mfs_close"); + /* + * Send a request to the filesystem server to exit. + */ + mfsp->mfs_buflist = (struct buf *)(-1); + wakeup((caddr_t)vp); + return (0); +} + +/* + * Memory filesystem inactive routine + */ +/* ARGSUSED */ +mfs_inactive(vp, p) + struct vnode *vp; + struct proc *p; +{ + + if (VTOMFS(vp)->mfs_buflist != (struct buf *)(-1)) + panic("mfs_inactive: not inactive"); + return (0); +} + +/* + * Print out the contents of an mfsnode. + */ +mfs_print(vp) + struct vnode *vp; +{ + register struct mfsnode *mfsp = VTOMFS(vp); + + printf("tag VT_MFS, pid %d, base %d, size %d\n", mfsp->mfs_pid, + mfsp->mfs_baseoff, mfsp->mfs_size); +} + +/* + * Block device bad operation + */ +mfs_badop() +{ + + panic("mfs_badop called\n"); + /* NOTREACHED */ +} + +/* + * Memory based filesystem initialization. + */ +mfs_init() +{ + +} -- 2.20.1