d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
eabc9678bc
freebsd-nq/sys/nfsclient/nfs_nfsiod.c
Bruce Evans e4f937b07b Included <sys/sysproto.h> to get central declarations for syscall args 
structs and prototypes for syscalls.

Ifdefed duplicated decentralized declarations of args structs.  It's
convenient to have this visible but they are hard to maintain.  Some
are already different from the central declarations.  4.4lite2 puts
them in comments in the function headers but I wanted to avoid the
large changes for that.
1995-11-14 05:16:37 +00:00

1130 lines
30 KiB
C
Raw Blame History

/*
* 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_syscalls.c 8.3 (Berkeley) 1/4/94
* $Id: nfs_syscalls.c,v 1.8 1995/10/29 15:33:11 phk Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/namei.h>
#include <sys/syslog.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#ifdef ISO
#include <netiso/iso.h>
#endif
#include <nfs/xdr_subs.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nfsm_subs.h>
#include <nfs/nfsrvcache.h>
#include <nfs/nfsmount.h>
#include <nfs/nfsnode.h>
#include <nfs/nqnfs.h>
#include <nfs/nfsrtt.h>
void nfsrv_zapsock __P((struct nfssvc_sock *));
/* Global defs. */
extern int (*nfsrv3_procs[NFS_NPROCS])();
extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
extern int nfs_numasync;
extern time_t nqnfsstarttime;
extern int nqsrv_writeslack;
extern int nfsrtton;
extern struct nfsstats nfsstats;
extern int nfsrvw_procrastinate;
struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock;
int nuidhash_max = NFS_MAXUIDHASH;
static int nfs_numnfsd = 0;
int nfsd_waiting = 0;
static int notstarted = 1;
static int modify_flag = 0;
static struct nfsdrt nfsdrt;
void nfsrv_cleancache(), nfsrv_rcv(), nfsrv_wakenfsd(), nfs_sndunlock();
static void nfsd_rt();
void nfsrv_slpderef();
#define TRUE 1
#define FALSE 0
static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON];
/*
* NFS server system calls
* getfh() lives here too, but maybe should move to kern/vfs_syscalls.c
*/
/*
* Get file handle system call
*/
#ifndef _SYS_SYSPROTO_H_
struct getfh_args {
char *fname;
fhandle_t *fhp;
};
#endif
int
getfh(p, uap, retval)
struct proc *p;
register struct getfh_args *uap;
int *retval;
{
register struct vnode *vp;
fhandle_t fh;
int error;
struct nameidata nd;
/*
* Must be super user
*/
error = suser(p->p_ucred, &p->p_acflag);
if(error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
bzero((caddr_t)&fh, sizeof(fh));
fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
error = VFS_VPTOFH(vp, &fh.fh_fid);
vput(vp);
if (error)
return (error);
error = copyout((caddr_t)&fh, (caddr_t)uap->fhp, sizeof (fh));
return (error);
}
/*
* Nfs server psuedo system call for the nfsd's
* Based on the flag value it either:
* - adds a socket to the selection list
* - remains in the kernel as an nfsd
* - remains in the kernel as an nfsiod
*/
#ifndef _SYS_SYSPROTO_H_
struct nfssvc_args {
int flag;
caddr_t argp;
};
#endif
int
nfssvc(p, uap, retval)
struct proc *p;
register struct nfssvc_args *uap;
int *retval;
{
struct nameidata nd;
struct file *fp;
struct mbuf *nam;
struct nfsd_args nfsdarg;
struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
struct nfsd_cargs ncd;
struct nfsd *nfsd;
struct nfssvc_sock *slp;
struct nfsuid *nuidp;
struct nfsmount *nmp;
int error;
/*
* Must be super user
*/
error = suser(p->p_ucred, &p->p_acflag);
if(error)
return (error);
while (nfssvc_sockhead_flag & SLP_INIT) {
nfssvc_sockhead_flag |= SLP_WANTINIT;
(void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0);
}
if (uap->flag & NFSSVC_BIOD)
error = nfssvc_iod(p);
else if (uap->flag & NFSSVC_MNTD) {
error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
ncd.ncd_dirp, p);
error = namei(&nd);
if (error)
return (error);
if ((nd.ni_vp->v_flag & VROOT) == 0)
error = EINVAL;
nmp = VFSTONFS(nd.ni_vp->v_mount);
vput(nd.ni_vp);
if (error)
return (error);
if ((nmp->nm_flag & NFSMNT_MNTD) &&
(uap->flag & NFSSVC_GOTAUTH) == 0)
return (0);
nmp->nm_flag |= NFSMNT_MNTD;
error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag,
uap->argp, p);
} else if (uap->flag & NFSSVC_ADDSOCK) {
error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
if (error)
return (error);
error = getsock(p->p_fd, nfsdarg.sock, &fp);
if (error)
return (error);
/*
* Get the client address for connected sockets.
*/
if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
nam = (struct mbuf *)0;
else {
error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen,
MT_SONAME);
if (error)
return (error);
}
error = nfssvc_addsock(fp, nam);
} else {
error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
if (error)
return (error);
if ((uap->flag & NFSSVC_AUTHIN) && ((nfsd = nsd->nsd_nfsd)) &&
(nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
slp = nfsd->nfsd_slp;
/*
* First check to see if another nfsd has already
* added this credential.
*/
for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
(!nfsd->nfsd_nd->nd_nam2 ||
netaddr_match(NU_NETFAM(nuidp),
&nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
break;
}
if (nuidp) {
nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
} else {
/*
* Nope, so we will.
*/
if (slp->ns_numuids < nuidhash_max) {
slp->ns_numuids++;
nuidp = (struct nfsuid *)
malloc(sizeof (struct nfsuid), M_NFSUID,
M_WAITOK);
} else
nuidp = (struct nfsuid *)0;
if ((slp->ns_flag & SLP_VALID) == 0) {
if (nuidp)
free((caddr_t)nuidp, M_NFSUID);
} else {
if (nuidp == (struct nfsuid *)0) {
nuidp = slp->ns_uidlruhead.tqh_first;
LIST_REMOVE(nuidp, nu_hash);
TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
nu_lru);
if (nuidp->nu_flag & NU_NAM)
m_freem(nuidp->nu_nam);
}
nuidp->nu_flag = 0;
nuidp->nu_cr = nsd->nsd_cr;
if (nuidp->nu_cr.cr_ngroups > NGROUPS)
nuidp->nu_cr.cr_ngroups = NGROUPS;
nuidp->nu_cr.cr_ref = 1;
nuidp->nu_timestamp = nsd->nsd_timestamp;
nuidp->nu_expire = time.tv_sec + nsd->nsd_ttl;
/*
* and save the session key in nu_key.
*/
bcopy(nsd->nsd_key, nuidp->nu_key,
sizeof (nsd->nsd_key));
if (nfsd->nfsd_nd->nd_nam2) {
struct sockaddr_in *saddr;
saddr = mtod(nfsd->nfsd_nd->nd_nam2,
struct sockaddr_in *);
switch (saddr->sin_family) {
case AF_INET:
nuidp->nu_flag |= NU_INETADDR;
nuidp->nu_inetaddr =
saddr->sin_addr.s_addr;
break;
case AF_ISO:
default:
nuidp->nu_flag |= NU_NAM;
nuidp->nu_nam = m_copym(
nfsd->nfsd_nd->nd_nam2, 0,
M_COPYALL, M_WAIT);
break;
};
}
TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
nu_lru);
LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
nuidp, nu_hash);
nfsrv_setcred(&nuidp->nu_cr,
&nfsd->nfsd_nd->nd_cr);
nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
}
}
}
if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
nfsd->nfsd_flag |= NFSD_AUTHFAIL;
error = nfssvc_nfsd(nsd, uap->argp, p);
}
if (error == EINTR || error == ERESTART)
error = 0;
return (error);
}
/*
* Adds a socket to the list for servicing by nfsds.
*/
int
nfssvc_addsock(fp, mynam)
struct file *fp;
struct mbuf *mynam;
{
register struct mbuf *m;
register int siz;
register struct nfssvc_sock *slp;
register struct socket *so;
struct nfssvc_sock *tslp;
int error, s;
so = (struct socket *)fp->f_data;
tslp = (struct nfssvc_sock *)0;
/*
* Add it to the list, as required.
*/
if (so->so_proto->pr_protocol == IPPROTO_UDP) {
tslp = nfs_udpsock;
if (tslp->ns_flag & SLP_VALID) {
m_freem(mynam);
return (EPERM);
}
#ifdef ISO
} else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) {
tslp = nfs_cltpsock;
if (tslp->ns_flag & SLP_VALID) {
m_freem(mynam);
return (EPERM);
}
#endif /* ISO */
}
if (so->so_type == SOCK_STREAM)
siz = NFS_MAXPACKET + sizeof (u_long);
else
siz = NFS_MAXPACKET;
error = soreserve(so, siz, siz);
if (error) {
m_freem(mynam);
return (error);
}
/*
* Set protocol specific options { for now TCP only } and
* reserve some space. For datagram sockets, this can get called
* repeatedly for the same socket, but that isn't harmful.
*/
if (so->so_type == SOCK_STREAM) {
MGET(m, M_WAIT, MT_SOOPTS);
*mtod(m, int *) = 1;
m->m_len = sizeof(int);
sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m);
}
if (so->so_proto->pr_domain->dom_family == AF_INET &&
so->so_proto->pr_protocol == IPPROTO_TCP) {
MGET(m, M_WAIT, MT_SOOPTS);
*mtod(m, int *) = 1;
m->m_len = sizeof(int);
sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m);
}
so->so_rcv.sb_flags &= ~SB_NOINTR;
so->so_rcv.sb_timeo = 0;
so->so_snd.sb_flags &= ~SB_NOINTR;
so->so_snd.sb_timeo = 0;
if (tslp)
slp = tslp;
else {
slp = (struct nfssvc_sock *)
malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
TAILQ_INIT(&slp->ns_uidlruhead);
TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
}
slp->ns_so = so;
slp->ns_nam = mynam;
fp->f_count++;
slp->ns_fp = fp;
s = splnet();
so->so_upcallarg = (caddr_t)slp;
so->so_upcall = nfsrv_rcv;
slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
nfsrv_wakenfsd(slp);
splx(s);
return (0);
}
/*
* Called by nfssvc() for nfsds. Just loops around servicing rpc requests
* until it is killed by a signal.
*/
int
nfssvc_nfsd(nsd, argp, p)
struct nfsd_srvargs *nsd;
caddr_t argp;
struct proc *p;
{
register struct mbuf *m;
register int siz;
register struct nfssvc_sock *slp;
register struct socket *so;
register int *solockp;
struct nfsd *nfsd = nsd->nsd_nfsd;
struct nfsrv_descript *nd = NULL;
struct mbuf *mreq;
int error = 0, cacherep, s, sotype, writes_todo;
u_quad_t cur_usec;
#ifndef nolint
cacherep = RC_DOIT;
writes_todo = 0;
#endif
s = splnet();
if (nfsd == (struct nfsd *)0) {
nsd->nsd_nfsd = nfsd = (struct nfsd *)
malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
bzero((caddr_t)nfsd, sizeof (struct nfsd));
nfsd->nfsd_procp = p;
TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
nfs_numnfsd++;
}
/*
* Loop getting rpc requests until SIGKILL.
*/
for (;;) {
if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
(nfsd_head_flag & NFSD_CHECKSLP) == 0) {
nfsd->nfsd_flag |= NFSD_WAITING;
nfsd_waiting++;
error = tsleep((caddr_t)nfsd, PSOCK | PCATCH,
"nfsd", 0);
nfsd_waiting--;
if (error)
goto done;
}
if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
(nfsd_head_flag & NFSD_CHECKSLP) != 0) {
for (slp = nfssvc_sockhead.tqh_first; slp != 0;
slp = slp->ns_chain.tqe_next) {
if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
== (SLP_VALID | SLP_DOREC)) {
slp->ns_flag &= ~SLP_DOREC;
slp->ns_sref++;
nfsd->nfsd_slp = slp;
break;
}
}
if (slp == 0)
nfsd_head_flag &= ~NFSD_CHECKSLP;
}
if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
continue;
if (slp->ns_flag & SLP_VALID) {
if (slp->ns_flag & SLP_DISCONN)
nfsrv_zapsock(slp);
else if (slp->ns_flag & SLP_NEEDQ) {
slp->ns_flag &= ~SLP_NEEDQ;
(void) nfs_sndlock(&slp->ns_solock,
(struct nfsreq *)0);
nfsrv_rcv(slp->ns_so, (caddr_t)slp,
M_WAIT);
nfs_sndunlock(&slp->ns_solock);
}
error = nfsrv_dorec(slp, nfsd, &nd);
cur_usec = (u_quad_t)time.tv_sec * 1000000 +
(u_quad_t)time.tv_usec;
if (error && slp->ns_tq.lh_first &&
slp->ns_tq.lh_first->nd_time <= cur_usec) {
error = 0;
cacherep = RC_DOIT;
writes_todo = 1;
} else
writes_todo = 0;
nfsd->nfsd_flag |= NFSD_REQINPROG;
}
} else {
error = 0;
slp = nfsd->nfsd_slp;
}
if (error || (slp->ns_flag & SLP_VALID) == 0) {
if (nd) {
free((caddr_t)nd, M_NFSRVDESC);
nd = NULL;
}
nfsd->nfsd_slp = (struct nfssvc_sock *)0;
nfsd->nfsd_flag &= ~NFSD_REQINPROG;
nfsrv_slpderef(slp);
continue;
}
splx(s);
so = slp->ns_so;
sotype = so->so_type;
if (so->so_proto->pr_flags & PR_CONNREQUIRED)
solockp = &slp->ns_solock;
else
solockp = (int *)0;
if (nd) {
nd->nd_starttime = time;
if (nd->nd_nam2)
nd->nd_nam = nd->nd_nam2;
else
nd->nd_nam = slp->ns_nam;
/*
* Check to see if authorization is needed.
*/
if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
nsd->nsd_haddr = mtod(nd->nd_nam,
struct sockaddr_in *)->sin_addr.s_addr;
nsd->nsd_authlen = nfsd->nfsd_authlen;
nsd->nsd_verflen = nfsd->nfsd_verflen;
if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
nfsd->nfsd_authlen) &&
!copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
nfsd->nfsd_verflen) &&
!copyout((caddr_t)nsd, argp, sizeof (*nsd)))
return (ENEEDAUTH);
cacherep = RC_DROPIT;
} else
cacherep = nfsrv_getcache(nd, slp, &mreq);
/*
* Check for just starting up for NQNFS and send
* fake "try again later" replies to the NQNFS clients.
*/
if (notstarted && nqnfsstarttime <= time.tv_sec) {
if (modify_flag) {
nqnfsstarttime = time.tv_sec + nqsrv_writeslack;
modify_flag = 0;
} else
notstarted = 0;
}
if (notstarted) {
if ((nd->nd_flag & ND_NQNFS) == 0)
cacherep = RC_DROPIT;
else if (nd->nd_procnum != NFSPROC_WRITE) {
nd->nd_procnum = NFSPROC_NOOP;
nd->nd_repstat = NQNFS_TRYLATER;
cacherep = RC_DOIT;
} else
modify_flag = 1;
} else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
nd->nd_procnum = NFSPROC_NOOP;
nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
cacherep = RC_DOIT;
}
}
/*
* Loop to get all the write rpc relies that have been
* gathered together.
*/
do {
switch (cacherep) {
case RC_DOIT:
if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
nfsrvw_procrastinate > 0 && !notstarted))
error = nfsrv_writegather(&nd, slp,
nfsd->nfsd_procp, &mreq);
else
error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
slp, nfsd->nfsd_procp, &mreq);
if (mreq == NULL)
break;
if (error) {
if (nd->nd_procnum != NQNFSPROC_VACATED)
nfsstats.srv_errs++;
nfsrv_updatecache(nd, FALSE, mreq);
if (nd->nd_nam2)
m_freem(nd->nd_nam2);
break;
}
nfsstats.srvrpccnt[nd->nd_procnum]++;
nfsrv_updatecache(nd, TRUE, mreq);
nd->nd_mrep = (struct mbuf *)0;
case RC_REPLY:
m = mreq;
siz = 0;
while (m) {
siz += m->m_len;
m = m->m_next;
}
if (siz <= 0 || siz > NFS_MAXPACKET) {
printf("mbuf siz=%d\n",siz);
panic("Bad nfs svc reply");
}
m = mreq;
m->m_pkthdr.len = siz;
m->m_pkthdr.rcvif = (struct ifnet *)0;
/*
* For stream protocols, prepend a Sun RPC
* Record Mark.
*/
if (sotype == SOCK_STREAM) {
M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
*mtod(m, u_long *) = htonl(0x80000000 | siz);
}
if (solockp)
(void) nfs_sndlock(solockp, (struct nfsreq *)0);
if (slp->ns_flag & SLP_VALID)
error = nfs_send(so, nd->nd_nam2, m, NULL);
else {
error = EPIPE;
m_freem(m);
}
if (nfsrtton)
nfsd_rt(sotype, nd, cacherep);
if (nd->nd_nam2)
MFREE(nd->nd_nam2, m);
if (nd->nd_mrep)
m_freem(nd->nd_mrep);
if (error == EPIPE)
nfsrv_zapsock(slp);
if (solockp)
nfs_sndunlock(solockp);
if (error == EINTR || error == ERESTART) {
free((caddr_t)nd, M_NFSRVDESC);
nfsrv_slpderef(slp);
s = splnet();
goto done;
}
break;
case RC_DROPIT:
if (nfsrtton)
nfsd_rt(sotype, nd, cacherep);
m_freem(nd->nd_mrep);
m_freem(nd->nd_nam2);
break;
};
if (nd) {
FREE((caddr_t)nd, M_NFSRVDESC);
nd = NULL;
}
/*
* Check to see if there are outstanding writes that
* need to be serviced.
*/
cur_usec = (u_quad_t)time.tv_sec * 1000000 +
(u_quad_t)time.tv_usec;
s = splsoftclock();
if (slp->ns_tq.lh_first &&
slp->ns_tq.lh_first->nd_time <= cur_usec) {
cacherep = RC_DOIT;
writes_todo = 1;
} else
writes_todo = 0;
splx(s);
} while (writes_todo);
s = splnet();
if (nfsrv_dorec(slp, nfsd, &nd)) {
nfsd->nfsd_flag &= ~NFSD_REQINPROG;
nfsd->nfsd_slp = NULL;
nfsrv_slpderef(slp);
}
}
done:
TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
splx(s);
free((caddr_t)nfsd, M_NFSD);
nsd->nsd_nfsd = (struct nfsd *)0;
if (--nfs_numnfsd == 0)
nfsrv_init(TRUE); /* Reinitialize everything */
return (error);
}
/*
* Asynchronous I/O daemons for client nfs.
* They do read-ahead and write-behind operations on the block I/O cache.
* Never returns unless it fails or gets killed.
*/
int
nfssvc_iod(p)
struct proc *p;
{
register struct buf *bp, *nbp;
register int i, myiod;
struct vnode *vp;
int error = 0, s;
/*
* Assign my position or return error if too many already running
*/
myiod = -1;
for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
if (nfs_asyncdaemon[i] == 0) {
nfs_asyncdaemon[i]++;
myiod = i;
break;
}
if (myiod == -1)
return (EBUSY);
nfs_numasync++;
/*
* Just loop around doin our stuff until SIGKILL
*/
for (;;) {
while (nfs_bufq.tqh_first == NULL && error == 0) {
nfs_iodwant[myiod] = p;
error = tsleep((caddr_t)&nfs_iodwant[myiod],
PWAIT | PCATCH, "nfsidl", 0);
}
while ((bp = nfs_bufq.tqh_first) != NULL) {
/* Take one off the front of the list */
TAILQ_REMOVE(&nfs_bufq, bp, b_freelist);
if (bp->b_flags & B_READ)
(void) nfs_doio(bp, bp->b_rcred, (struct proc *)0);
else do {
/*
* Look for a delayed write for the same vnode, so I can do
* it now. We must grab it before calling nfs_doio() to
* avoid any risk of the vnode getting vclean()'d while
* we are doing the write rpc.
*/
vp = bp->b_vp;
s = splbio();
for (nbp = vp->v_dirtyblkhd.lh_first; nbp;
nbp = nbp->b_vnbufs.le_next) {
if ((nbp->b_flags &
(B_BUSY|B_DELWRI|B_NEEDCOMMIT|B_NOCACHE))!=B_DELWRI)
continue;
bremfree(nbp);
vfs_busy_pages(nbp, 1);
nbp->b_flags |= (B_BUSY|B_ASYNC);
break;
}
splx(s);
/*
* For the delayed write, do the first part of nfs_bwrite()
* up to, but not including nfs_strategy().
*/
if (nbp) {
nbp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI);
reassignbuf(nbp, nbp->b_vp);
nbp->b_vp->v_numoutput++;
}
(void) nfs_doio(bp, bp->b_wcred, (struct proc *)0);
} while (bp = nbp);
}
if (error) {
nfs_asyncdaemon[myiod] = 0;
nfs_numasync--;
return (error);
}
}
}
/*
* Shut down a socket associated with an nfssvc_sock structure.
* Should be called with the send lock set, if required.
* The trick here is to increment the sref at the start, so that the nfsds
* will stop using it and clear ns_flag at the end so that it will not be
* reassigned during cleanup.
*/
void
nfsrv_zapsock(slp)
register struct nfssvc_sock *slp;
{
register struct nfsuid *nuidp, *nnuidp;
register struct nfsrv_descript *nwp, *nnwp;
struct socket *so;
struct file *fp;
struct mbuf *m;
int s;
slp->ns_flag &= ~SLP_ALLFLAGS;
fp = slp->ns_fp;
if (fp) {
slp->ns_fp = (struct file *)0;
so = slp->ns_so;
so->so_upcall = NULL;
soshutdown(so, 2);
closef(fp, (struct proc *)0);
if (slp->ns_nam)
MFREE(slp->ns_nam, m);
m_freem(slp->ns_raw);
m_freem(slp->ns_rec);
for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0;
nuidp = nnuidp) {
nnuidp = nuidp->nu_lru.tqe_next;
LIST_REMOVE(nuidp, nu_hash);
TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
if (nuidp->nu_flag & NU_NAM)
m_freem(nuidp->nu_nam);
free((caddr_t)nuidp, M_NFSUID);
}
s = splsoftclock();
for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
nnwp = nwp->nd_tq.le_next;
LIST_REMOVE(nwp, nd_tq);
free((caddr_t)nwp, M_NFSRVDESC);
}
LIST_INIT(&slp->ns_tq);
splx(s);
}
}
/*
* Get an authorization string for the uid by having the mount_nfs sitting
* on this mount point porpous out of the kernel and do it.
*/
int
nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key)
register struct nfsmount *nmp;
struct nfsreq *rep;
struct ucred *cred;
char **auth_str;
int *auth_len;
char *verf_str;
int *verf_len;
NFSKERBKEY_T key; /* return session key */
{
int error = 0;
while ((nmp->nm_flag & NFSMNT_WAITAUTH) == 0) {
nmp->nm_flag |= NFSMNT_WANTAUTH;
(void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK,
"nfsauth1", 2 * hz);
error = nfs_sigintr(nmp, rep, rep->r_procp);
if (error) {
nmp->nm_flag &= ~NFSMNT_WANTAUTH;
return (error);
}
}
nmp->nm_flag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH);
nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
nmp->nm_authlen = RPCAUTH_MAXSIZ;
nmp->nm_verfstr = verf_str;
nmp->nm_verflen = *verf_len;
nmp->nm_authuid = cred->cr_uid;
wakeup((caddr_t)&nmp->nm_authstr);
/*
* And wait for mount_nfs to do its stuff.
*/
while ((nmp->nm_flag & NFSMNT_HASAUTH) == 0 && error == 0) {
(void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK,
"nfsauth2", 2 * hz);
error = nfs_sigintr(nmp, rep, rep->r_procp);
}
if (nmp->nm_flag & NFSMNT_AUTHERR) {
nmp->nm_flag &= ~NFSMNT_AUTHERR;
error = EAUTH;
}
if (error)
free((caddr_t)*auth_str, M_TEMP);
else {
*auth_len = nmp->nm_authlen;
*verf_len = nmp->nm_verflen;
bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
}
nmp->nm_flag &= ~NFSMNT_HASAUTH;
nmp->nm_flag |= NFSMNT_WAITAUTH;
if (nmp->nm_flag & NFSMNT_WANTAUTH) {
nmp->nm_flag &= ~NFSMNT_WANTAUTH;
wakeup((caddr_t)&nmp->nm_authtype);
}
return (error);
}
/*
* Get a nickname authenticator and verifier.
*/
int
nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len)
struct nfsmount *nmp;
struct ucred *cred;
char **auth_str;
int *auth_len;
char *verf_str;
int verf_len;
{
register struct nfsuid *nuidp;
register u_long *nickp, *verfp;
struct timeval ktvin, ktvout;
#ifdef DIAGNOSTIC
if (verf_len < (4 * NFSX_UNSIGNED))
panic("nfs_getnickauth verf too small");
#endif
for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
if (nuidp->nu_cr.cr_uid == cred->cr_uid)
break;
}
if (!nuidp || nuidp->nu_expire < time.tv_sec)
return (EACCES);
/*
* Move to the end of the lru list (end of lru == most recently used).
*/
TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
nickp = (u_long *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
*nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
*nickp = txdr_unsigned(nuidp->nu_nickname);
*auth_str = (char *)nickp;
*auth_len = 2 * NFSX_UNSIGNED;
/*
* Now we must encrypt the verifier and package it up.
*/
verfp = (u_long *)verf_str;
*verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
if (time.tv_sec > nuidp->nu_timestamp.tv_sec ||
(time.tv_sec == nuidp->nu_timestamp.tv_sec &&
time.tv_usec > nuidp->nu_timestamp.tv_usec))
nuidp->nu_timestamp = time;
else
nuidp->nu_timestamp.tv_usec++;
ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
/*
* Now encrypt the timestamp verifier in ecb mode using the session
* key.
*/
#ifdef NFSKERB
XXX
#endif
*verfp++ = ktvout.tv_sec;
*verfp++ = ktvout.tv_usec;
*verfp = 0;
return (0);
}
/*
* Save the current nickname in a hash list entry on the mount point.
*/
int
nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep)
register struct nfsmount *nmp;
struct ucred *cred;
int len;
NFSKERBKEY_T key;
struct mbuf **mdp;
char **dposp;
struct mbuf *mrep;
{
register struct nfsuid *nuidp;
register u_long *tl;
register long t1;
struct mbuf *md = *mdp;
struct timeval ktvin, ktvout;
u_long nick;
char *dpos = *dposp, *cp2;
int deltasec, error = 0;
if (len == (3 * NFSX_UNSIGNED)) {
nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
ktvin.tv_sec = *tl++;
ktvin.tv_usec = *tl++;
nick = fxdr_unsigned(u_long, *tl);
/*
* Decrypt the timestamp in ecb mode.
*/
#ifdef NFSKERB
XXX
#endif
ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
deltasec = time.tv_sec - ktvout.tv_sec;
if (deltasec < 0)
deltasec = -deltasec;
/*
* If ok, add it to the hash list for the mount point.
*/
if (deltasec <= NFS_KERBCLOCKSKEW) {
if (nmp->nm_numuids < nuidhash_max) {
nmp->nm_numuids++;
nuidp = (struct nfsuid *)
malloc(sizeof (struct nfsuid), M_NFSUID,
M_WAITOK);
} else {
nuidp = nmp->nm_uidlruhead.tqh_first;
LIST_REMOVE(nuidp, nu_hash);
TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
nu_lru);
}
nuidp->nu_flag = 0;
nuidp->nu_cr.cr_uid = cred->cr_uid;
nuidp->nu_expire = time.tv_sec + NFS_KERBTTL;
nuidp->nu_timestamp = ktvout;
nuidp->nu_nickname = nick;
bcopy(key, nuidp->nu_key, sizeof (key));
TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
nu_lru);
LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
nuidp, nu_hash);
}
} else
nfsm_adv(nfsm_rndup(len));
nfsmout:
*mdp = md;
*dposp = dpos;
return (error);
}
/*
* Derefence a server socket structure. If it has no more references and
* is no longer valid, you can throw it away.
*/
void
nfsrv_slpderef(slp)
register struct nfssvc_sock *slp;
{
if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
free((caddr_t)slp, M_NFSSVC);
}
}
/*
* Initialize the data structures for the server.
* Handshake with any new nfsds starting up to avoid any chance of
* corruption.
*/
void
nfsrv_init(terminating)
int terminating;
{
register struct nfssvc_sock *slp, *nslp;
if (nfssvc_sockhead_flag & SLP_INIT)
panic("nfsd init");
nfssvc_sockhead_flag |= SLP_INIT;
if (terminating) {
for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) {
nslp = slp->ns_chain.tqe_next;
if (slp->ns_flag & SLP_VALID)
nfsrv_zapsock(slp);
TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
free((caddr_t)slp, M_NFSSVC);
}
nfsrv_cleancache(); /* And clear out server cache */
}
TAILQ_INIT(&nfssvc_sockhead);
nfssvc_sockhead_flag &= ~SLP_INIT;
if (nfssvc_sockhead_flag & SLP_WANTINIT) {
nfssvc_sockhead_flag &= ~SLP_WANTINIT;
wakeup((caddr_t)&nfssvc_sockhead);
}
TAILQ_INIT(&nfsd_head);
nfsd_head_flag &= ~NFSD_CHECKSLP;
nfs_udpsock = (struct nfssvc_sock *)
malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
nfs_cltpsock = (struct nfssvc_sock *)
malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
}
/*
* Add entries to the server monitor log.
*/
static void
nfsd_rt(sotype, nd, cacherep)
int sotype;
register struct nfsrv_descript *nd;
int cacherep;
{
register struct drt *rt;
rt = &nfsdrt.drt[nfsdrt.pos];
if (cacherep == RC_DOIT)
rt->flag = 0;
else if (cacherep == RC_REPLY)
rt->flag = DRT_CACHEREPLY;
else
rt->flag = DRT_CACHEDROP;
if (sotype == SOCK_STREAM)
rt->flag |= DRT_TCP;
if (nd->nd_flag & ND_NQNFS)
rt->flag |= DRT_NQNFS;
else if (nd->nd_flag & ND_NFSV3)
rt->flag |= DRT_NFSV3;
rt->proc = nd->nd_procnum;
if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET)
rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr;
else
rt->ipadr = INADDR_ANY;
rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) +
(time.tv_usec - nd->nd_starttime.tv_usec);
rt->tstamp = time;
nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
}
Reference in New Issue View Git Blame Copy Permalink