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Fix a nasty hang connected with write gathering. Also add debug print

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statements to bits of the server which helped me find the hang.
This commit is contained in:
Doug Rabson 1997-05-10 16:12:03 +00:00
parent 057df964f4
commit 5ae0f71815
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=25663
12 changed files with 156 additions and 44 deletions
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19
sys/nfs/nfs.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs.h 8.4 (Berkeley) 5/1/95
* $Id: nfs.h,v 1.23 1997/03/27 20:01:03 guido Exp $
* $Id: nfs.h,v 1.24 1997/03/29 12:34:33 bde Exp $
*/
#ifndef _NFS_NFS_H_
@ -517,6 +517,23 @@ extern int nfsd_head_flag;
!bcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \
sizeof (struct ucred)))
#ifdef NFS_DEBUG
extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
#define NFS_DEBUG_WG 2 /* server write gathering */
#define NFS_DEBUG_RC 4 /* server request caching */
#define NFS_DPF(cat, args) \
do { \
if (nfs_debug & NFS_DEBUG_##cat) printf args; \
} while (0)
#else
#define NFS_DPF(cat, args)
#endif
int nfs_init __P((struct vfsconf *vfsp));
int nfs_reply __P((struct nfsreq *));

19
sys/nfs/nfs_serv.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs_serv.c 8.3 (Berkeley) 1/12/94
* $Id: nfs_serv.c,v 1.39 1997/03/25 05:13:40 peter Exp $
* $Id: nfs_serv.c,v 1.40 1997/03/29 12:40:18 bde Exp $
*/
/*
@ -999,6 +999,7 @@ nfsmout:
owp = wp;
wp = wp->nd_tq.le_next;
}
NFS_DPF(WG, ("Q%03x", nfsd->nd_retxid & 0xfff));
if (owp) {
LIST_INSERT_AFTER(owp, nfsd, nd_tq);
} else {
@ -1050,6 +1051,7 @@ loop1:
break;
if (nfsd->nd_mreq)
continue;
NFS_DPF(WG, ("P%03x", nfsd->nd_retxid & 0xfff));
LIST_REMOVE(nfsd, nd_tq);
LIST_REMOVE(nfsd, nd_hash);
splx(s);
@ -1126,6 +1128,7 @@ loop1:
*/
swp = nfsd;
do {
NFS_DPF(WG, ("R%03x", nfsd->nd_retxid & 0xfff));
if (error) {
nfsm_writereply(NFSX_WCCDATA(v3), v3);
if (v3) {
@ -1185,6 +1188,7 @@ loop1:
s = splsoftclock();
for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next)
if (nfsd->nd_mreq) {
NFS_DPF(WG, ("X%03x", nfsd->nd_retxid & 0xfff));
LIST_REMOVE(nfsd, nd_tq);
*mrq = nfsd->nd_mreq;
*ndp = nfsd;
@ -1209,7 +1213,10 @@ nfsrvw_coalesce(owp, nfsd)
{
register int overlap;
register struct mbuf *mp;
struct nfsrv_descript *p;
NFS_DPF(WG, ("C%03x-%03x",
nfsd->nd_retxid & 0xfff, owp->nd_retxid & 0xfff));
LIST_REMOVE(nfsd, nd_hash);
LIST_REMOVE(nfsd, nd_tq);
if (owp->nd_eoff < nfsd->nd_eoff) {
@ -1232,6 +1239,16 @@ nfsrvw_coalesce(owp, nfsd)
owp->nd_stable == NFSV3WRITE_UNSTABLE)
owp->nd_stable = NFSV3WRITE_DATASYNC;
LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq);
/*
* If nfsd had anything else coalesced into it, transfer them
* to owp, otherwise their replies will never get sent.
*/
for (p = nfsd->nd_coalesce.lh_first; p;
p = nfsd->nd_coalesce.lh_first) {
LIST_REMOVE(p, nd_tq);
LIST_INSERT_HEAD(&owp->nd_coalesce, p, nd_tq);
}
}
/*

6
sys/nfs/nfs_srvcache.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs_srvcache.c 8.3 (Berkeley) 3/30/95
* $Id$
* $Id: nfs_srvcache.c,v 1.11 1997/02/22 09:42:40 peter Exp $
*/
#ifndef NFS_NOSERVER
@ -184,6 +184,7 @@ loop:
rp = rp->rc_hash.le_next) {
if (nd->nd_retxid == rp->rc_xid && nd->nd_procnum == rp->rc_proc &&
netaddr_match(NETFAMILY(rp), &rp->rc_haddr, nd->nd_nam)) {
NFS_DPF(RC, ("H%03x", rp->rc_xid & 0xfff));
if ((rp->rc_flag & RC_LOCKED) != 0) {
rp->rc_flag |= RC_WANTED;
(void) tsleep((caddr_t)rp, PZERO-1, "nfsrc", 0);
@ -224,6 +225,7 @@ loop:
}
}
nfsstats.srvcache_misses++;
NFS_DPF(RC, ("M%03x", nd->nd_retxid & 0xfff));
if (numnfsrvcache < desirednfsrvcache) {
rp = (struct nfsrvcache *)malloc((u_long)sizeof *rp,
M_NFSD, M_WAITOK);
@ -289,6 +291,7 @@ loop:
rp = rp->rc_hash.le_next) {
if (nd->nd_retxid == rp->rc_xid && nd->nd_procnum == rp->rc_proc &&
netaddr_match(NETFAMILY(rp), &rp->rc_haddr, nd->nd_nam)) {
NFS_DPF(RC, ("U%03x", rp->rc_xid & 0xfff));
if ((rp->rc_flag & RC_LOCKED) != 0) {
rp->rc_flag |= RC_WANTED;
(void) tsleep((caddr_t)rp, PZERO-1, "nfsrc", 0);
@ -319,6 +322,7 @@ loop:
return;
}
}
NFS_DPF(RC, ("L%03x", nd->nd_retxid & 0xfff));
}
/*

18
sys/nfs/nfsmount.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfsmount.h 8.3 (Berkeley) 3/30/95
* $Id$
* $Id: nfsmount.h,v 1.11 1997/02/22 09:42:48 peter Exp $
*/
@ -95,22 +95,6 @@ struct nfsmount {
*/
#define VFSTONFS(mp) ((struct nfsmount *)((mp)->mnt_data))
#ifdef NFS_DEBUG
extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO 1
#define NFS_DPF(cat, args) \
do { \
if (nfs_debug & NFS_DEBUG_##cat) printf args; \
} while (0)
#else
#define NFS_DPF(cat, args)
#endif
#endif /* KERNEL */
#endif

19
sys/nfsclient/nfs.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs.h 8.4 (Berkeley) 5/1/95
* $Id: nfs.h,v 1.23 1997/03/27 20:01:03 guido Exp $
* $Id: nfs.h,v 1.24 1997/03/29 12:34:33 bde Exp $
*/
#ifndef _NFS_NFS_H_
@ -517,6 +517,23 @@ extern int nfsd_head_flag;
!bcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \
sizeof (struct ucred)))
#ifdef NFS_DEBUG
extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
#define NFS_DEBUG_WG 2 /* server write gathering */
#define NFS_DEBUG_RC 4 /* server request caching */
#define NFS_DPF(cat, args) \
do { \
if (nfs_debug & NFS_DEBUG_##cat) printf args; \
} while (0)
#else
#define NFS_DPF(cat, args)
#endif
int nfs_init __P((struct vfsconf *vfsp));
int nfs_reply __P((struct nfsreq *));

19
sys/nfsclient/nfsargs.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs.h 8.4 (Berkeley) 5/1/95
* $Id: nfs.h,v 1.23 1997/03/27 20:01:03 guido Exp $
* $Id: nfs.h,v 1.24 1997/03/29 12:34:33 bde Exp $
*/
#ifndef _NFS_NFS_H_
@ -517,6 +517,23 @@ extern int nfsd_head_flag;
!bcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \
sizeof (struct ucred)))
#ifdef NFS_DEBUG
extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
#define NFS_DEBUG_WG 2 /* server write gathering */
#define NFS_DEBUG_RC 4 /* server request caching */
#define NFS_DPF(cat, args) \
do { \
if (nfs_debug & NFS_DEBUG_##cat) printf args; \
} while (0)
#else
#define NFS_DPF(cat, args)
#endif
int nfs_init __P((struct vfsconf *vfsp));
int nfs_reply __P((struct nfsreq *));

18
sys/nfsclient/nfsmount.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfsmount.h 8.3 (Berkeley) 3/30/95
* $Id$
* $Id: nfsmount.h,v 1.11 1997/02/22 09:42:48 peter Exp $
*/
@ -95,22 +95,6 @@ struct nfsmount {
*/
#define VFSTONFS(mp) ((struct nfsmount *)((mp)->mnt_data))
#ifdef NFS_DEBUG
extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO 1
#define NFS_DPF(cat, args) \
do { \
if (nfs_debug & NFS_DEBUG_##cat) printf args; \
} while (0)
#else
#define NFS_DPF(cat, args)
#endif
#endif /* KERNEL */
#endif

19
sys/nfsclient/nfsstats.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs.h 8.4 (Berkeley) 5/1/95
* $Id: nfs.h,v 1.23 1997/03/27 20:01:03 guido Exp $
* $Id: nfs.h,v 1.24 1997/03/29 12:34:33 bde Exp $
*/
#ifndef _NFS_NFS_H_
@ -517,6 +517,23 @@ extern int nfsd_head_flag;
!bcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \
sizeof (struct ucred)))
#ifdef NFS_DEBUG
extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
#define NFS_DEBUG_WG 2 /* server write gathering */
#define NFS_DEBUG_RC 4 /* server request caching */
#define NFS_DPF(cat, args) \
do { \
if (nfs_debug & NFS_DEBUG_##cat) printf args; \
} while (0)
#else
#define NFS_DPF(cat, args)
#endif
int nfs_init __P((struct vfsconf *vfsp));
int nfs_reply __P((struct nfsreq *));

19
sys/nfsserver/nfs.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs.h 8.4 (Berkeley) 5/1/95
* $Id: nfs.h,v 1.23 1997/03/27 20:01:03 guido Exp $
* $Id: nfs.h,v 1.24 1997/03/29 12:34:33 bde Exp $
*/
#ifndef _NFS_NFS_H_
@ -517,6 +517,23 @@ extern int nfsd_head_flag;
!bcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \
sizeof (struct ucred)))
#ifdef NFS_DEBUG
extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
#define NFS_DEBUG_WG 2 /* server write gathering */
#define NFS_DEBUG_RC 4 /* server request caching */
#define NFS_DPF(cat, args) \
do { \
if (nfs_debug & NFS_DEBUG_##cat) printf args; \
} while (0)
#else
#define NFS_DPF(cat, args)
#endif
int nfs_init __P((struct vfsconf *vfsp));
int nfs_reply __P((struct nfsreq *));

19
sys/nfsserver/nfs_serv.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs_serv.c 8.3 (Berkeley) 1/12/94
* $Id: nfs_serv.c,v 1.39 1997/03/25 05:13:40 peter Exp $
* $Id: nfs_serv.c,v 1.40 1997/03/29 12:40:18 bde Exp $
*/
/*
@ -999,6 +999,7 @@ nfsmout:
owp = wp;
wp = wp->nd_tq.le_next;
}
NFS_DPF(WG, ("Q%03x", nfsd->nd_retxid & 0xfff));
if (owp) {
LIST_INSERT_AFTER(owp, nfsd, nd_tq);
} else {
@ -1050,6 +1051,7 @@ loop1:
break;
if (nfsd->nd_mreq)
continue;
NFS_DPF(WG, ("P%03x", nfsd->nd_retxid & 0xfff));
LIST_REMOVE(nfsd, nd_tq);
LIST_REMOVE(nfsd, nd_hash);
splx(s);
@ -1126,6 +1128,7 @@ loop1:
*/
swp = nfsd;
do {
NFS_DPF(WG, ("R%03x", nfsd->nd_retxid & 0xfff));
if (error) {
nfsm_writereply(NFSX_WCCDATA(v3), v3);
if (v3) {
@ -1185,6 +1188,7 @@ loop1:
s = splsoftclock();
for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next)
if (nfsd->nd_mreq) {
NFS_DPF(WG, ("X%03x", nfsd->nd_retxid & 0xfff));
LIST_REMOVE(nfsd, nd_tq);
*mrq = nfsd->nd_mreq;
*ndp = nfsd;
@ -1209,7 +1213,10 @@ nfsrvw_coalesce(owp, nfsd)
{
register int overlap;
register struct mbuf *mp;
struct nfsrv_descript *p;
NFS_DPF(WG, ("C%03x-%03x",
nfsd->nd_retxid & 0xfff, owp->nd_retxid & 0xfff));
LIST_REMOVE(nfsd, nd_hash);
LIST_REMOVE(nfsd, nd_tq);
if (owp->nd_eoff < nfsd->nd_eoff) {
@ -1232,6 +1239,16 @@ nfsrvw_coalesce(owp, nfsd)
owp->nd_stable == NFSV3WRITE_UNSTABLE)
owp->nd_stable = NFSV3WRITE_DATASYNC;
LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq);
/*
* If nfsd had anything else coalesced into it, transfer them
* to owp, otherwise their replies will never get sent.
*/
for (p = nfsd->nd_coalesce.lh_first; p;
p = nfsd->nd_coalesce.lh_first) {
LIST_REMOVE(p, nd_tq);
LIST_INSERT_HEAD(&owp->nd_coalesce, p, nd_tq);
}
}
/*

6
sys/nfsserver/nfs_srvcache.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs_srvcache.c 8.3 (Berkeley) 3/30/95
* $Id$
* $Id: nfs_srvcache.c,v 1.11 1997/02/22 09:42:40 peter Exp $
*/
#ifndef NFS_NOSERVER
@ -184,6 +184,7 @@ loop:
rp = rp->rc_hash.le_next) {
if (nd->nd_retxid == rp->rc_xid && nd->nd_procnum == rp->rc_proc &&
netaddr_match(NETFAMILY(rp), &rp->rc_haddr, nd->nd_nam)) {
NFS_DPF(RC, ("H%03x", rp->rc_xid & 0xfff));
if ((rp->rc_flag & RC_LOCKED) != 0) {
rp->rc_flag |= RC_WANTED;
(void) tsleep((caddr_t)rp, PZERO-1, "nfsrc", 0);
@ -224,6 +225,7 @@ loop:
}
}
nfsstats.srvcache_misses++;
NFS_DPF(RC, ("M%03x", nd->nd_retxid & 0xfff));
if (numnfsrvcache < desirednfsrvcache) {
rp = (struct nfsrvcache *)malloc((u_long)sizeof *rp,
M_NFSD, M_WAITOK);
@ -289,6 +291,7 @@ loop:
rp = rp->rc_hash.le_next) {
if (nd->nd_retxid == rp->rc_xid && nd->nd_procnum == rp->rc_proc &&
netaddr_match(NETFAMILY(rp), &rp->rc_haddr, nd->nd_nam)) {
NFS_DPF(RC, ("U%03x", rp->rc_xid & 0xfff));
if ((rp->rc_flag & RC_LOCKED) != 0) {
rp->rc_flag |= RC_WANTED;
(void) tsleep((caddr_t)rp, PZERO-1, "nfsrc", 0);
@ -319,6 +322,7 @@ loop:
return;
}
}
NFS_DPF(RC, ("L%03x", nd->nd_retxid & 0xfff));
}
/*

19
sys/nfsserver/nfsrvstats.h
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs.h 8.4 (Berkeley) 5/1/95
* $Id: nfs.h,v 1.23 1997/03/27 20:01:03 guido Exp $
* $Id: nfs.h,v 1.24 1997/03/29 12:34:33 bde Exp $
*/
#ifndef _NFS_NFS_H_
@ -517,6 +517,23 @@ extern int nfsd_head_flag;
!bcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \
sizeof (struct ucred)))
#ifdef NFS_DEBUG
extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
#define NFS_DEBUG_WG 2 /* server write gathering */
#define NFS_DEBUG_RC 4 /* server request caching */
#define NFS_DPF(cat, args) \
do { \
if (nfs_debug & NFS_DEBUG_##cat) printf args; \
} while (0)
#else
#define NFS_DPF(cat, args)
#endif
int nfs_init __P((struct vfsconf *vfsp));
int nfs_reply __P((struct nfsreq *));