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52dee2bc03
freebsd-nq/sys/fs/nfsclient/nfs_clstate.c
Rick Macklem 52dee2bc03 nfscl: Handle NFSv4.1/4.2 Close RPC NFSERR_DELAY replies better 
Without this patch, if a NFSv4.1/4.2 server replies NFSERR_DELAY to
a Close operation, the client loops retrying the Close while holding
a shared lock on the clientID.  This shared lock blocks returns of
delegations, even though the server has issued a CB_RECALL to request
the delegation return.

This patch delays doing a retry of a Close that received a reply of
NFSERR_DELAY until after the shared lock on the clientID is released,
for NFSv4.1/4.2.  To fix this for NFSv4.0 would be very difficult and
since the only known NFSv4 server to reply NFSERR_DELAY to Close only
does NFSv4.1/4.2, this fix is hoped to be sufficient.

This problem was detected during a recent IETF working group NFSv4
testing event.

MFC after:	2 week
2021-10-18 15:05:34 -07:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2009 Rick Macklem, University of Guelph
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* These functions implement the client side state handling for NFSv4.
* NFSv4 state handling:
* - A lockowner is used to determine lock contention, so it
* corresponds directly to a Posix pid. (1 to 1 mapping)
* - The correct granularity of an OpenOwner is not nearly so
* obvious. An OpenOwner does the following:
* - provides a serial sequencing of Open/Close/Lock-with-new-lockowner
* - is used to check for Open/Share contention (not applicable to
* this client, since all Opens are Deny_None)
* As such, I considered both extreme.
* 1 OpenOwner per ClientID - Simple to manage, but fully serializes
* all Open, Close and Lock (with a new lockowner) Ops.
* 1 OpenOwner for each Open - This one results in an OpenConfirm for
* every Open, for most servers.
* So, I chose to use the same mapping as I did for LockOwnwers.
* The main concern here is that you can end up with multiple Opens
* for the same File Handle, but on different OpenOwners (opens
* inherited from parents, grandparents...) and you do not know
* which of these the vnodeop close applies to. This is handled by
* delaying the Close Op(s) until all of the Opens have been closed.
* (It is not yet obvious if this is the correct granularity.)
* - How the code handles serialization:
* - For the ClientId, it uses an exclusive lock while getting its
* SetClientId and during recovery. Otherwise, it uses a shared
* lock via a reference count.
* - For the rest of the data structures, it uses an SMP mutex
* (once the nfs client is SMP safe) and doesn't sleep while
* manipulating the linked lists.
* - The serialization of Open/Close/Lock/LockU falls out in the
* "wash", since OpenOwners and LockOwners are both mapped from
* Posix pid. In other words, there is only one Posix pid using
* any given owner, so that owner is serialized. (If you change
* the granularity of the OpenOwner, then code must be added to
* serialize Ops on the OpenOwner.)
* - When to get rid of OpenOwners and LockOwners.
* - The function nfscl_cleanup_common() is executed after a process exits.
* It goes through the client list looking for all Open and Lock Owners.
* When one is found, it is marked "defunct" or in the case of
* an OpenOwner without any Opens, freed.
* The renew thread scans for defunct Owners and gets rid of them,
* if it can. The LockOwners will also be deleted when the
* associated Open is closed.
* - If the LockU or Close Op(s) fail during close in a way
* that could be recovered upon retry, they are relinked to the
* ClientId's defunct open list and retried by the renew thread
* until they succeed or an unmount/recovery occurs.
* (Since we are done with them, they do not need to be recovered.)
*/
#include <fs/nfs/nfsport.h>
/*
* Global variables
*/
extern struct nfsstatsv1 nfsstatsv1;
extern struct nfsreqhead nfsd_reqq;
extern u_int32_t newnfs_false, newnfs_true;
extern int nfscl_debuglevel;
extern int nfscl_enablecallb;
extern int nfs_numnfscbd;
NFSREQSPINLOCK;
NFSCLSTATEMUTEX;
int nfscl_inited = 0;
struct nfsclhead nfsclhead; /* Head of clientid list */
int nfscl_deleghighwater = NFSCLDELEGHIGHWATER;
int nfscl_layouthighwater = NFSCLLAYOUTHIGHWATER;
static int nfscl_delegcnt = 0;
static int nfscl_layoutcnt = 0;
static int nfscl_getopen(struct nfsclownerhead *, struct nfsclopenhash *,
u_int8_t *, int, u_int8_t *, u_int8_t *, u_int32_t,
struct nfscllockowner **, struct nfsclopen **);
static bool nfscl_checkown(struct nfsclowner *, struct nfsclopen *, uint8_t *,
uint8_t *, struct nfscllockowner **, struct nfsclopen **,
struct nfsclopen **);
static void nfscl_clrelease(struct nfsclclient *);
static void nfscl_unlinkopen(struct nfsclopen *);
static void nfscl_cleanclient(struct nfsclclient *);
static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *,
struct ucred *, NFSPROC_T *);
static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *,
struct nfsmount *, struct ucred *, NFSPROC_T *);
static void nfscl_recover(struct nfsclclient *, bool *, struct ucred *,
NFSPROC_T *);
static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *,
struct nfscllock *, int);
static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **,
struct nfscllock **, int);
static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *);
static u_int32_t nfscl_nextcbident(void);
static mount_t nfscl_getmnt(int, uint8_t *, u_int32_t, struct nfsclclient **);
static struct nfsclclient *nfscl_getclnt(u_int32_t);
static struct nfsclclient *nfscl_getclntsess(uint8_t *);
static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *,
int);
static void nfscl_retoncloselayout(vnode_t, struct nfsclclient *, uint8_t *,
int, struct nfsclrecalllayout **);
static void nfscl_reldevinfo_locked(struct nfscldevinfo *);
static struct nfscllayout *nfscl_findlayout(struct nfsclclient *, u_int8_t *,
int);
static struct nfscldevinfo *nfscl_finddevinfo(struct nfsclclient *, uint8_t *);
static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *,
u_int8_t *, struct nfscllock **);
static void nfscl_freealllocks(struct nfscllockownerhead *, int);
static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int,
struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **);
static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *,
struct nfsclowner **, struct nfsclowner **, struct nfsclopen **,
struct nfsclopen **, u_int8_t *, u_int8_t *, int, struct ucred *, int *);
static int nfscl_moveopen(vnode_t , struct nfsclclient *,
struct nfsmount *, struct nfsclopen *, struct nfsclowner *,
struct nfscldeleg *, struct ucred *, NFSPROC_T *);
static void nfscl_totalrecall(struct nfsclclient *);
static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *,
struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *);
static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int,
u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int,
struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *);
static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *,
int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short,
struct ucred *, NFSPROC_T *);
static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t,
struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *);
static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *,
bool);
static int nfscl_errmap(struct nfsrv_descript *, u_int32_t);
static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *);
static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *,
struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int,
vnode_t *);
static void nfscl_freeopenowner(struct nfsclowner *, int);
static void nfscl_cleandeleg(struct nfscldeleg *);
static void nfscl_emptylockowner(struct nfscllockowner *,
struct nfscllockownerfhhead *);
static void nfscl_mergeflayouts(struct nfsclflayouthead *,
struct nfsclflayouthead *);
static int nfscl_layoutrecall(int, struct nfscllayout *, uint32_t, uint64_t,
uint64_t, uint32_t, uint32_t, uint32_t, char *, struct nfsclrecalllayout *);
static int nfscl_seq(uint32_t, uint32_t);
static void nfscl_layoutreturn(struct nfsmount *, struct nfscllayout *,
struct ucred *, NFSPROC_T *);
static void nfscl_dolayoutcommit(struct nfsmount *, struct nfscllayout *,
struct ucred *, NFSPROC_T *);
static short nfscberr_null[] = {
0,
0,
};
static short nfscberr_getattr[] = {
NFSERR_RESOURCE,
NFSERR_BADHANDLE,
NFSERR_BADXDR,
NFSERR_RESOURCE,
NFSERR_SERVERFAULT,
0,
};
static short nfscberr_recall[] = {
NFSERR_RESOURCE,
NFSERR_BADHANDLE,
NFSERR_BADSTATEID,
NFSERR_BADXDR,
NFSERR_RESOURCE,
NFSERR_SERVERFAULT,
0,
};
static short *nfscl_cberrmap[] = {
nfscberr_null,
nfscberr_null,
nfscberr_null,
nfscberr_getattr,
nfscberr_recall
};
#define NETFAMILY(clp) \
(((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET)
/*
* Called for an open operation.
* If the nfhp argument is NULL, just get an openowner.
*/
int
nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg,
struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp,
struct nfsclopen **opp, int *newonep, int *retp, int lockit, bool firstref)
{
struct nfsclclient *clp;
struct nfsclowner *owp, *nowp;
struct nfsclopen *op = NULL, *nop = NULL;
struct nfscldeleg *dp;
struct nfsclownerhead *ohp;
u_int8_t own[NFSV4CL_LOCKNAMELEN];
int ret;
if (newonep != NULL)
*newonep = 0;
if (opp != NULL)
*opp = NULL;
if (owpp != NULL)
*owpp = NULL;
/*
* Might need one or both of these, so MALLOC them now, to
* avoid a tsleep() in MALLOC later.
*/
nowp = malloc(sizeof (struct nfsclowner),
M_NFSCLOWNER, M_WAITOK);
if (nfhp != NULL) {
nop = malloc(sizeof (struct nfsclopen) +
fhlen - 1, M_NFSCLOPEN, M_WAITOK);
nop->nfso_hash.le_prev = NULL;
}
ret = nfscl_getcl(vp->v_mount, cred, p, false, firstref, &clp);
if (ret != 0) {
free(nowp, M_NFSCLOWNER);
if (nop != NULL)
free(nop, M_NFSCLOPEN);
return (ret);
}
/*
* Get the Open iff it already exists.
* If none found, add the new one or return error, depending upon
* "create".
*/
NFSLOCKCLSTATE();
dp = NULL;
/* First check the delegation list */
if (nfhp != NULL && usedeleg) {
LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
if (dp->nfsdl_fhlen == fhlen &&
!NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
if (!(amode & NFSV4OPEN_ACCESSWRITE) ||
(dp->nfsdl_flags & NFSCLDL_WRITE))
break;
dp = NULL;
break;
}
}
}
/* For NFSv4.1/4.2 and this option, use a single open_owner. */
if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount)))
nfscl_filllockowner(NULL, own, F_POSIX);
else
nfscl_filllockowner(p->td_proc, own, F_POSIX);
if (dp != NULL)
ohp = &dp->nfsdl_owner;
else
ohp = &clp->nfsc_owner;
/* Now, search for an openowner */
LIST_FOREACH(owp, ohp, nfsow_list) {
if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN))
break;
}
/*
* Create a new open, as required.
*/
nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen,
cred, newonep);
/*
* Now, check the mode on the open and return the appropriate
* value.
*/
if (retp != NULL) {
if (nfhp != NULL && dp != NULL && nop == NULL)
/* new local open on delegation */
*retp = NFSCLOPEN_SETCRED;
else
*retp = NFSCLOPEN_OK;
}
if (op != NULL && (amode & ~(op->nfso_mode))) {
op->nfso_mode |= amode;
if (retp != NULL && dp == NULL)
*retp = NFSCLOPEN_DOOPEN;
}
/*
* Serialize modifications to the open owner for multiple threads
* within the same process using a read/write sleep lock.
* For NFSv4.1 and a single OpenOwner, allow concurrent open operations
* by acquiring a shared lock. The close operations still use an
* exclusive lock for this case.
*/
if (lockit != 0) {
if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount))) {
/*
* Get a shared lock on the OpenOwner, but first
* wait for any pending exclusive lock, so that the
* exclusive locker gets priority.
*/
nfsv4_lock(&owp->nfsow_rwlock, 0, NULL,
NFSCLSTATEMUTEXPTR, NULL);
nfsv4_getref(&owp->nfsow_rwlock, NULL,
NFSCLSTATEMUTEXPTR, NULL);
} else
nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR);
}
NFSUNLOCKCLSTATE();
if (nowp != NULL)
free(nowp, M_NFSCLOWNER);
if (nop != NULL)
free(nop, M_NFSCLOPEN);
if (owpp != NULL)
*owpp = owp;
if (opp != NULL)
*opp = op;
return (0);
}
/*
* Create a new open, as required.
*/
static void
nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp,
struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp,
struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen,
struct ucred *cred, int *newonep)
{
struct nfsclowner *owp = *owpp, *nowp;
struct nfsclopen *op, *nop;
if (nowpp != NULL)
nowp = *nowpp;
else
nowp = NULL;
if (nopp != NULL)
nop = *nopp;
else
nop = NULL;
if (owp == NULL && nowp != NULL) {
NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
LIST_INIT(&nowp->nfsow_open);
nowp->nfsow_clp = clp;
nowp->nfsow_seqid = 0;
nowp->nfsow_defunct = 0;
nfscl_lockinit(&nowp->nfsow_rwlock);
if (dp != NULL) {
nfsstatsv1.cllocalopenowners++;
LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list);
} else {
nfsstatsv1.clopenowners++;
LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list);
}
owp = *owpp = nowp;
*nowpp = NULL;
if (newonep != NULL)
*newonep = 1;
}
/* If an fhp has been specified, create an Open as well. */
if (fhp != NULL) {
/* and look for the correct open, based upon FH */
LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
if (op->nfso_fhlen == fhlen &&
!NFSBCMP(op->nfso_fh, fhp, fhlen))
break;
}
if (op == NULL && nop != NULL) {
nop->nfso_own = owp;
nop->nfso_mode = 0;
nop->nfso_opencnt = 0;
nop->nfso_posixlock = 1;
nop->nfso_fhlen = fhlen;
NFSBCOPY(fhp, nop->nfso_fh, fhlen);
LIST_INIT(&nop->nfso_lock);
nop->nfso_stateid.seqid = 0;
nop->nfso_stateid.other[0] = 0;
nop->nfso_stateid.other[1] = 0;
nop->nfso_stateid.other[2] = 0;
KASSERT(cred != NULL, ("%s: cred NULL\n", __func__));
newnfs_copyincred(cred, &nop->nfso_cred);
if (dp != NULL) {
TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
nfsdl_list);
dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
nfsstatsv1.cllocalopens++;
} else {
LIST_INSERT_HEAD(NFSCLOPENHASH(clp, fhp, fhlen),
nop, nfso_hash);
nfsstatsv1.clopens++;
}
LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list);
*opp = nop;
*nopp = NULL;
if (newonep != NULL)
*newonep = 1;
} else {
*opp = op;
}
}
}
/*
* Called to find/add a delegation to a client.
*/
int
nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp,
int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp)
{
struct nfscldeleg *dp = *dpp, *tdp;
struct nfsmount *nmp;
KASSERT(mp != NULL, ("nfscl_deleg: mp NULL"));
nmp = VFSTONFS(mp);
/*
* First, if we have received a Read delegation for a file on a
* read/write file system, just return it, because they aren't
* useful, imho.
*/
if (dp != NULL && !NFSMNT_RDONLY(mp) &&
(dp->nfsdl_flags & NFSCLDL_READ)) {
nfscl_trydelegreturn(dp, cred, nmp, p);
free(dp, M_NFSCLDELEG);
*dpp = NULL;
return (0);
}
/*
* Since a delegation might be added to the mount,
* set NFSMNTP_DELEGISSUED now. If a delegation already
* exagain ists, setting this flag is harmless.
*/
NFSLOCKMNT(nmp);
nmp->nm_privflag |= NFSMNTP_DELEGISSUED;
NFSUNLOCKMNT(nmp);
/* Look for the correct deleg, based upon FH */
NFSLOCKCLSTATE();
tdp = nfscl_finddeleg(clp, nfhp, fhlen);
if (tdp == NULL) {
if (dp == NULL) {
NFSUNLOCKCLSTATE();
return (NFSERR_BADSTATEID);
}
*dpp = NULL;
TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp,
nfsdl_hash);
dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
nfsstatsv1.cldelegates++;
nfscl_delegcnt++;
} else {
/*
* Delegation already exists, what do we do if a new one??
*/
if (dp != NULL) {
printf("Deleg already exists!\n");
free(dp, M_NFSCLDELEG);
*dpp = NULL;
} else {
*dpp = tdp;
}
}
NFSUNLOCKCLSTATE();
return (0);
}
/*
* Find a delegation for this file handle. Return NULL upon failure.
*/
static struct nfscldeleg *
nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
{
struct nfscldeleg *dp;
LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) {
if (dp->nfsdl_fhlen == fhlen &&
!NFSBCMP(dp->nfsdl_fh, fhp, fhlen))
break;
}
return (dp);
}
/*
* Get a stateid for an I/O operation. First, look for an open and iff
* found, return either a lockowner stateid or the open stateid.
* If no Open is found, just return error and the special stateid of all zeros.
*/
int
nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode,
int fords, struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp,
void **lckpp)
{
struct nfsclclient *clp;
struct nfsclopen *op = NULL, *top;
struct nfsclopenhash *oph;
struct nfscllockowner *lp;
struct nfscldeleg *dp;
struct nfsnode *np;
struct nfsmount *nmp;
u_int8_t own[NFSV4CL_LOCKNAMELEN], lockown[NFSV4CL_LOCKNAMELEN];
int error;
bool done;
*lckpp = NULL;
/*
* Initially, just set the special stateid of all zeros.
* (Don't do this for a DS, since the special stateid can't be used.)
*/
if (fords == 0) {
stateidp->seqid = 0;
stateidp->other[0] = 0;
stateidp->other[1] = 0;
stateidp->other[2] = 0;
}
if (vnode_vtype(vp) != VREG)
return (EISDIR);
np = VTONFS(vp);
nmp = VFSTONFS(vp->v_mount);
/*
* For "oneopenown" mounts, first check for a cached open in the
* NFS vnode, that can be used as a stateid. This can only be
* done if no delegations have been issued to the mount and no
* byte range file locking has been done for the file.
*/
if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp) && fords == 0) {
NFSLOCKMNT(nmp);
NFSLOCKNODE(np);
if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0 &&
(np->n_flag & NMIGHTBELOCKED) == 0 &&
np->n_openstateid != NULL) {
stateidp->seqid = 0;
stateidp->other[0] =
np->n_openstateid->nfso_stateid.other[0];
stateidp->other[1] =
np->n_openstateid->nfso_stateid.other[1];
stateidp->other[2] =
np->n_openstateid->nfso_stateid.other[2];
NFSUNLOCKNODE(np);
NFSUNLOCKMNT(nmp);
return (0);
}
NFSUNLOCKNODE(np);
NFSUNLOCKMNT(nmp);
}
NFSLOCKCLSTATE();
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return (EACCES);
}
/*
* Wait for recovery to complete.
*/
while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG))
(void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR,
PZERO, "nfsrecvr", NULL);
/*
* First, look for a delegation.
*/
LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
if (dp->nfsdl_fhlen == fhlen &&
!NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
if (!(mode & NFSV4OPEN_ACCESSWRITE) ||
(dp->nfsdl_flags & NFSCLDL_WRITE)) {
if (NFSHASNFSV4N(nmp))
stateidp->seqid = 0;
else
stateidp->seqid =
dp->nfsdl_stateid.seqid;
stateidp->other[0] = dp->nfsdl_stateid.other[0];
stateidp->other[1] = dp->nfsdl_stateid.other[1];
stateidp->other[2] = dp->nfsdl_stateid.other[2];
if (!(np->n_flag & NDELEGRECALL)) {
TAILQ_REMOVE(&clp->nfsc_deleg, dp,
nfsdl_list);
TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
nfsdl_list);
dp->nfsdl_timestamp = NFSD_MONOSEC +
120;
dp->nfsdl_rwlock.nfslock_usecnt++;
*lckpp = (void *)&dp->nfsdl_rwlock;
}
NFSUNLOCKCLSTATE();
return (0);
}
break;
}
}
if (p != NULL) {
/*
* If p != NULL, we want to search the parentage tree
* for a matching OpenOwner and use that.
*/
if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount)))
nfscl_filllockowner(NULL, own, F_POSIX);
else
nfscl_filllockowner(p->td_proc, own, F_POSIX);
nfscl_filllockowner(p->td_proc, lockown, F_POSIX);
lp = NULL;
error = nfscl_getopen(NULL, clp->nfsc_openhash, nfhp, fhlen,
own, lockown, mode, &lp, &op);
if (error == 0 && lp != NULL && fords == 0) {
/* Don't return a lock stateid for a DS. */
if (NFSHASNFSV4N(nmp))
stateidp->seqid = 0;
else
stateidp->seqid = lp->nfsl_stateid.seqid;
stateidp->other[0] =
lp->nfsl_stateid.other[0];
stateidp->other[1] =
lp->nfsl_stateid.other[1];
stateidp->other[2] =
lp->nfsl_stateid.other[2];
NFSUNLOCKCLSTATE();
return (0);
}
}
if (op == NULL) {
/* If not found, just look for any OpenOwner that will work. */
top = NULL;
done = false;
oph = NFSCLOPENHASH(clp, nfhp, fhlen);
LIST_FOREACH(op, oph, nfso_hash) {
if (op->nfso_fhlen == fhlen &&
!NFSBCMP(op->nfso_fh, nfhp, fhlen)) {
if (top == NULL && (op->nfso_mode &
NFSV4OPEN_ACCESSWRITE) != 0 &&
(mode & NFSV4OPEN_ACCESSREAD) != 0)
top = op;
if ((mode & op->nfso_mode) == mode) {
/* LRU order the hash list. */
LIST_REMOVE(op, nfso_hash);
LIST_INSERT_HEAD(oph, op, nfso_hash);
done = true;
break;
}
}
}
if (!done) {
NFSCL_DEBUG(2, "openmode top=%p\n", top);
if (top == NULL || NFSHASOPENMODE(nmp)) {
NFSUNLOCKCLSTATE();
return (ENOENT);
} else
op = top;
}
/*
* For read aheads or write behinds, use the open cred.
* A read ahead or write behind is indicated by p == NULL.
*/
if (p == NULL)
newnfs_copycred(&op->nfso_cred, cred);
}
/*
* No lock stateid, so return the open stateid.
*/
if (NFSHASNFSV4N(nmp))
stateidp->seqid = 0;
else
stateidp->seqid = op->nfso_stateid.seqid;
stateidp->other[0] = op->nfso_stateid.other[0];
stateidp->other[1] = op->nfso_stateid.other[1];
stateidp->other[2] = op->nfso_stateid.other[2];
NFSUNLOCKCLSTATE();
return (0);
}
/*
* Search for a matching file, mode and, optionally, lockowner.
*/
static int
nfscl_getopen(struct nfsclownerhead *ohp, struct nfsclopenhash *ohashp,
u_int8_t *nfhp, int fhlen, u_int8_t *openown, u_int8_t *lockown,
u_int32_t mode, struct nfscllockowner **lpp, struct nfsclopen **opp)
{
struct nfsclowner *owp;
struct nfsclopen *op, *rop, *rop2;
struct nfsclopenhash *oph;
bool keep_looping;
KASSERT(ohp == NULL || ohashp == NULL, ("nfscl_getopen: "
"only one of ohp and ohashp can be set"));
if (lpp != NULL)
*lpp = NULL;
/*
* rop will be set to the open to be returned. There are three
* variants of this, all for an open of the correct file:
* 1 - A match of lockown.
* 2 - A match of the openown, when no lockown match exists.
* 3 - A match for any open, if no openown or lockown match exists.
* Looking for #2 over #3 probably isn't necessary, but since
* RFC3530 is vague w.r.t. the relationship between openowners and
* lockowners, I think this is the safer way to go.
*/
rop = NULL;
rop2 = NULL;
keep_looping = true;
/* Search the client list */
if (ohashp == NULL) {
/* Search the local opens on the delegation. */
LIST_FOREACH(owp, ohp, nfsow_list) {
/* and look for the correct open */
LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
if (op->nfso_fhlen == fhlen &&
!NFSBCMP(op->nfso_fh, nfhp, fhlen)
&& (op->nfso_mode & mode) == mode)
keep_looping = nfscl_checkown(owp, op, openown,
lockown, lpp, &rop, &rop2);
if (!keep_looping)
break;
}
if (!keep_looping)
break;
}
} else {
/* Search for matching opens on the hash list. */
oph = &ohashp[NFSCLOPENHASHFUNC(nfhp, fhlen)];
LIST_FOREACH(op, oph, nfso_hash) {
if (op->nfso_fhlen == fhlen &&
!NFSBCMP(op->nfso_fh, nfhp, fhlen)
&& (op->nfso_mode & mode) == mode)
keep_looping = nfscl_checkown(op->nfso_own, op,
openown, lockown, lpp, &rop, &rop2);
if (!keep_looping) {
/* LRU order the hash list. */
LIST_REMOVE(op, nfso_hash);
LIST_INSERT_HEAD(oph, op, nfso_hash);
break;
}
}
}
if (rop == NULL)
rop = rop2;
if (rop == NULL)
return (EBADF);
*opp = rop;
return (0);
}
/* Check for an owner match. */
static bool
nfscl_checkown(struct nfsclowner *owp, struct nfsclopen *op, uint8_t *openown,
uint8_t *lockown, struct nfscllockowner **lpp, struct nfsclopen **ropp,
struct nfsclopen **ropp2)
{
struct nfscllockowner *lp;
bool keep_looping;
keep_looping = true;
if (lpp != NULL) {
/* Now look for a matching lockowner. */
LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
if (!NFSBCMP(lp->nfsl_owner, lockown,
NFSV4CL_LOCKNAMELEN)) {
*lpp = lp;
*ropp = op;
return (false);
}
}
}
if (*ropp == NULL && !NFSBCMP(owp->nfsow_owner, openown,
NFSV4CL_LOCKNAMELEN)) {
*ropp = op;
if (lpp == NULL)
keep_looping = false;
}
if (*ropp2 == NULL)
*ropp2 = op;
return (keep_looping);
}
/*
* Release use of an open owner. Called when open operations are done
* with the open owner.
*/
void
nfscl_ownerrelease(struct nfsmount *nmp, struct nfsclowner *owp,
__unused int error, __unused int candelete, int unlocked)
{
if (owp == NULL)
return;
NFSLOCKCLSTATE();
if (unlocked == 0) {
if (NFSHASONEOPENOWN(nmp))
nfsv4_relref(&owp->nfsow_rwlock);
else
nfscl_lockunlock(&owp->nfsow_rwlock);
}
nfscl_clrelease(owp->nfsow_clp);
NFSUNLOCKCLSTATE();
}
/*
* Release use of an open structure under an open owner.
*/
void
nfscl_openrelease(struct nfsmount *nmp, struct nfsclopen *op, int error,
int candelete)
{
struct nfsclclient *clp;
struct nfsclowner *owp;
if (op == NULL)
return;
NFSLOCKCLSTATE();
owp = op->nfso_own;
if (NFSHASONEOPENOWN(nmp))
nfsv4_relref(&owp->nfsow_rwlock);
else
nfscl_lockunlock(&owp->nfsow_rwlock);
clp = owp->nfsow_clp;
if (error && candelete && op->nfso_opencnt == 0)
nfscl_freeopen(op, 0, true);
nfscl_clrelease(clp);
NFSUNLOCKCLSTATE();
}
/*
* Called to get a clientid structure. It will optionally lock the
* client data structures to do the SetClientId/SetClientId_confirm,
* but will release that lock and return the clientid with a reference
* count on it.
* If the "cred" argument is NULL, a new clientid should not be created.
* If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot
* be done.
* It always clpp with a reference count on it, unless returning an error.
*/
int
nfscl_getcl(struct mount *mp, struct ucred *cred, NFSPROC_T *p,
bool tryminvers, bool firstref, struct nfsclclient **clpp)
{
struct nfsclclient *clp;
struct nfsclclient *newclp = NULL;
struct nfsmount *nmp;
char uuid[HOSTUUIDLEN];
int igotlock = 0, error, trystalecnt, clidinusedelay, i;
u_int16_t idlen = 0;
nmp = VFSTONFS(mp);
if (cred != NULL) {
getcredhostuuid(cred, uuid, sizeof uuid);
idlen = strlen(uuid);
if (idlen > 0)
idlen += sizeof (u_int64_t);
else
idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */
newclp = malloc(
sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT,
M_WAITOK | M_ZERO);
}
NFSLOCKCLSTATE();
/*
* If a forced dismount is already in progress, don't
* allocate a new clientid and get out now. For the case where
* clp != NULL, this is a harmless optimization.
*/
if (NFSCL_FORCEDISM(mp)) {
NFSUNLOCKCLSTATE();
if (newclp != NULL)
free(newclp, M_NFSCLCLIENT);
return (EBADF);
}
clp = nmp->nm_clp;
if (clp == NULL) {
if (newclp == NULL) {
NFSUNLOCKCLSTATE();
return (EACCES);
}
clp = newclp;
clp->nfsc_idlen = idlen;
LIST_INIT(&clp->nfsc_owner);
TAILQ_INIT(&clp->nfsc_deleg);
TAILQ_INIT(&clp->nfsc_layout);
LIST_INIT(&clp->nfsc_devinfo);
for (i = 0; i < NFSCLDELEGHASHSIZE; i++)
LIST_INIT(&clp->nfsc_deleghash[i]);
for (i = 0; i < NFSCLOPENHASHSIZE; i++)
LIST_INIT(&clp->nfsc_openhash[i]);
for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
LIST_INIT(&clp->nfsc_layouthash[i]);
clp->nfsc_flags = NFSCLFLAGS_INITED;
clp->nfsc_clientidrev = 1;
clp->nfsc_cbident = nfscl_nextcbident();
nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id,
clp->nfsc_idlen);
LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list);
nmp->nm_clp = clp;
clp->nfsc_nmp = nmp;
} else {
if (newclp != NULL)
free(newclp, M_NFSCLCLIENT);
}
while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock &&
!NFSCL_FORCEDISM(mp))
igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
NFSCLSTATEMUTEXPTR, mp);
if (igotlock == 0) {
/*
* Call nfsv4_lock() with "iwantlock == 0" on the firstref so
* that it will wait for a pending exclusive lock request.
* This gives the exclusive lock request priority over this
* shared lock request.
* An exclusive lock on nfsc_lock is used mainly for server
* crash recoveries and delegation recalls.
*/
if (firstref)
nfsv4_lock(&clp->nfsc_lock, 0, NULL, NFSCLSTATEMUTEXPTR,
mp);
nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
}
if (igotlock == 0 && NFSCL_FORCEDISM(mp)) {
/*
* Both nfsv4_lock() and nfsv4_getref() know to check
* for NFSCL_FORCEDISM() and return without sleeping to
* wait for the exclusive lock to be released, since it
* might be held by nfscl_umount() and we need to get out
* now for that case and not wait until nfscl_umount()
* releases it.
*/
NFSUNLOCKCLSTATE();
return (EBADF);
}
NFSUNLOCKCLSTATE();
/*
* If it needs a clientid, do the setclientid now.
*/
if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) {
if (!igotlock)
panic("nfscl_clget");
if (p == NULL || cred == NULL) {
NFSLOCKCLSTATE();
nfsv4_unlock(&clp->nfsc_lock, 0);
NFSUNLOCKCLSTATE();
return (EACCES);
}
/*
* If RFC3530 Sec. 14.2.33 is taken literally,
* NFSERR_CLIDINUSE will be returned persistently for the
* case where a new mount of the same file system is using
* a different principal. In practice, NFSERR_CLIDINUSE is
* only returned when there is outstanding unexpired state
* on the clientid. As such, try for twice the lease
* interval, if we know what that is. Otherwise, make a
* wild ass guess.
* The case of returning NFSERR_STALECLIENTID is far less
* likely, but might occur if there is a significant delay
* between doing the SetClientID and SetClientIDConfirm Ops,
* such that the server throws away the clientid before
* receiving the SetClientIDConfirm.
*/
if (clp->nfsc_renew > 0)
clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2;
else
clidinusedelay = 120;
trystalecnt = 3;
do {
error = nfsrpc_setclient(nmp, clp, 0, NULL, cred, p);
if (error == NFSERR_STALECLIENTID ||
error == NFSERR_STALEDONTRECOVER ||
error == NFSERR_BADSESSION ||
error == NFSERR_CLIDINUSE) {
(void) nfs_catnap(PZERO, error, "nfs_setcl");
} else if (error == NFSERR_MINORVERMISMATCH &&
tryminvers) {
if (nmp->nm_minorvers > 0)
nmp->nm_minorvers--;
else
tryminvers = false;
}
} while (((error == NFSERR_STALECLIENTID ||
error == NFSERR_BADSESSION ||
error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) ||
(error == NFSERR_CLIDINUSE && --clidinusedelay > 0) ||
(error == NFSERR_MINORVERMISMATCH && tryminvers));
if (error) {
NFSLOCKCLSTATE();
nfsv4_unlock(&clp->nfsc_lock, 0);
NFSUNLOCKCLSTATE();
return (error);
}
clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
}
if (igotlock) {
NFSLOCKCLSTATE();
nfsv4_unlock(&clp->nfsc_lock, 1);
NFSUNLOCKCLSTATE();
}
*clpp = clp;
return (0);
}
/*
* Get a reference to a clientid and return it, if valid.
*/
struct nfsclclient *
nfscl_findcl(struct nfsmount *nmp)
{
struct nfsclclient *clp;
clp = nmp->nm_clp;
if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID))
return (NULL);
return (clp);
}
/*
* Release the clientid structure. It may be locked or reference counted.
*/
static void
nfscl_clrelease(struct nfsclclient *clp)
{
if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
nfsv4_unlock(&clp->nfsc_lock, 0);
else
nfsv4_relref(&clp->nfsc_lock);
}
/*
* External call for nfscl_clrelease.
*/
void
nfscl_clientrelease(struct nfsclclient *clp)
{
NFSLOCKCLSTATE();
if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
nfsv4_unlock(&clp->nfsc_lock, 0);
else
nfsv4_relref(&clp->nfsc_lock);
NFSUNLOCKCLSTATE();
}
/*
* Called when wanting to lock a byte region.
*/
int
nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp,
int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp,
struct nfscllockowner **lpp, int *newonep, int *donelocallyp)
{
struct nfscllockowner *lp;
struct nfsclopen *op;
struct nfsclclient *clp;
struct nfscllockowner *nlp;
struct nfscllock *nlop, *otherlop;
struct nfscldeleg *dp = NULL, *ldp = NULL;
struct nfscllockownerhead *lhp = NULL;
struct nfsnode *np;
u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN];
u_int8_t *openownp;
int error = 0, ret, donelocally = 0;
u_int32_t mode;
/* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */
mode = 0;
np = VTONFS(vp);
*lpp = NULL;
lp = NULL;
*newonep = 0;
*donelocallyp = 0;
/*
* Might need these, so MALLOC them now, to
* avoid a tsleep() in MALLOC later.
*/
nlp = malloc(
sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK);
otherlop = malloc(
sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
nlop = malloc(
sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
nlop->nfslo_type = type;
nlop->nfslo_first = off;
if (len == NFS64BITSSET) {
nlop->nfslo_end = NFS64BITSSET;
} else {
nlop->nfslo_end = off + len;
if (nlop->nfslo_end <= nlop->nfslo_first)
error = NFSERR_INVAL;
}
if (!error) {
if (recovery)
clp = rclp;
else
error = nfscl_getcl(vp->v_mount, cred, p, false, true,
&clp);
}
if (error) {
free(nlp, M_NFSCLLOCKOWNER);
free(otherlop, M_NFSCLLOCK);
free(nlop, M_NFSCLLOCK);
return (error);
}
op = NULL;
if (recovery) {
ownp = rownp;
openownp = ropenownp;
} else {
nfscl_filllockowner(id, own, flags);
ownp = own;
if (NFSHASONEOPENOWN(VFSTONFS(vp->v_mount)))
nfscl_filllockowner(NULL, openown, F_POSIX);
else
nfscl_filllockowner(p->td_proc, openown, F_POSIX);
openownp = openown;
}
if (!recovery) {
NFSLOCKCLSTATE();
/*
* First, search for a delegation. If one exists for this file,
* the lock can be done locally against it, so long as there
* isn't a local lock conflict.
*/
ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len);
/* Just sanity check for correct type of delegation */
if (dp != NULL && ((dp->nfsdl_flags &
(NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 ||
(type == F_WRLCK &&
(dp->nfsdl_flags & NFSCLDL_WRITE) == 0)))
dp = NULL;
}
if (dp != NULL) {
/* Now, find an open and maybe a lockowner. */
ret = nfscl_getopen(&dp->nfsdl_owner, NULL, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op);
if (ret)
ret = nfscl_getopen(NULL, clp->nfsc_openhash,
np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
ownp, mode, NULL, &op);
if (!ret) {
lhp = &dp->nfsdl_lock;
TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
donelocally = 1;
} else {
dp = NULL;
}
}
if (!donelocally) {
/*
* Get the related Open and maybe lockowner.
*/
error = nfscl_getopen(NULL, clp->nfsc_openhash,
np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
ownp, mode, &lp, &op);
if (!error)
lhp = &op->nfso_lock;
}
if (!error && !recovery)
error = nfscl_localconflict(clp, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len, nlop, ownp, ldp, NULL);
if (error) {
if (!recovery) {
nfscl_clrelease(clp);
NFSUNLOCKCLSTATE();
}
free(nlp, M_NFSCLLOCKOWNER);
free(otherlop, M_NFSCLLOCK);
free(nlop, M_NFSCLLOCK);
return (error);
}
/*
* Ok, see if a lockowner exists and create one, as required.
*/
if (lp == NULL)
LIST_FOREACH(lp, lhp, nfsl_list) {
if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN))
break;
}
if (lp == NULL) {
NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN);
if (recovery)
NFSBCOPY(ropenownp, nlp->nfsl_openowner,
NFSV4CL_LOCKNAMELEN);
else
NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner,
NFSV4CL_LOCKNAMELEN);
nlp->nfsl_seqid = 0;
nlp->nfsl_lockflags = flags;
nlp->nfsl_inprog = NULL;
nfscl_lockinit(&nlp->nfsl_rwlock);
LIST_INIT(&nlp->nfsl_lock);
if (donelocally) {
nlp->nfsl_open = NULL;
nfsstatsv1.cllocallockowners++;
} else {
nlp->nfsl_open = op;
nfsstatsv1.cllockowners++;
}
LIST_INSERT_HEAD(lhp, nlp, nfsl_list);
lp = nlp;
nlp = NULL;
*newonep = 1;
}
/*
* Now, update the byte ranges for locks.
*/
ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally);
if (!ret)
donelocally = 1;
if (donelocally) {
*donelocallyp = 1;
if (!recovery)
nfscl_clrelease(clp);
} else {
/*
* Serial modifications on the lock owner for multiple threads
* for the same process using a read/write lock.
*/
if (!recovery)
nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
}
if (!recovery)
NFSUNLOCKCLSTATE();
if (nlp)
free(nlp, M_NFSCLLOCKOWNER);
if (nlop)
free(nlop, M_NFSCLLOCK);
if (otherlop)
free(otherlop, M_NFSCLLOCK);
*lpp = lp;
return (0);
}
/*
* Called to unlock a byte range, for LockU.
*/
int
nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
__unused struct ucred *cred, NFSPROC_T *p, int callcnt,
struct nfsclclient *clp, void *id, int flags,
struct nfscllockowner **lpp, int *dorpcp)
{
struct nfscllockowner *lp;
struct nfsclopen *op;
struct nfscllock *nlop, *other_lop = NULL;
struct nfscldeleg *dp;
struct nfsnode *np;
u_int8_t own[NFSV4CL_LOCKNAMELEN];
int ret = 0, fnd;
np = VTONFS(vp);
*lpp = NULL;
*dorpcp = 0;
/*
* Might need these, so MALLOC them now, to
* avoid a tsleep() in MALLOC later.
*/
nlop = malloc(
sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
nlop->nfslo_type = F_UNLCK;
nlop->nfslo_first = off;
if (len == NFS64BITSSET) {
nlop->nfslo_end = NFS64BITSSET;
} else {
nlop->nfslo_end = off + len;
if (nlop->nfslo_end <= nlop->nfslo_first) {
free(nlop, M_NFSCLLOCK);
return (NFSERR_INVAL);
}
}
if (callcnt == 0) {
other_lop = malloc(
sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
*other_lop = *nlop;
}
nfscl_filllockowner(id, own, flags);
dp = NULL;
NFSLOCKCLSTATE();
if (callcnt == 0)
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len);
/*
* First, unlock any local regions on a delegation.
*/
if (dp != NULL) {
/* Look for this lockowner. */
LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
if (!NFSBCMP(lp->nfsl_owner, own,
NFSV4CL_LOCKNAMELEN))
break;
}
if (lp != NULL)
/* Use other_lop, so nlop is still available */
(void)nfscl_updatelock(lp, &other_lop, NULL, 1);
}
/*
* Now, find a matching open/lockowner that hasn't already been done,
* as marked by nfsl_inprog.
*/
lp = NULL;
fnd = 0;
LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len), nfso_hash) {
if (op->nfso_fhlen == np->n_fhp->nfh_len &&
!NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
if (lp->nfsl_inprog == NULL &&
!NFSBCMP(lp->nfsl_owner, own,
NFSV4CL_LOCKNAMELEN)) {
fnd = 1;
break;
}
}
}
if (fnd)
break;
}
if (lp != NULL) {
ret = nfscl_updatelock(lp, &nlop, NULL, 0);
if (ret)
*dorpcp = 1;
/*
* Serial modifications on the lock owner for multiple
* threads for the same process using a read/write lock.
*/
lp->nfsl_inprog = p;
nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
*lpp = lp;
}
NFSUNLOCKCLSTATE();
if (nlop)
free(nlop, M_NFSCLLOCK);
if (other_lop)
free(other_lop, M_NFSCLLOCK);
return (0);
}
/*
* Release all lockowners marked in progess for this process and file.
*/
void
nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p,
void *id, int flags)
{
struct nfsclopen *op;
struct nfscllockowner *lp;
struct nfsnode *np;
u_int8_t own[NFSV4CL_LOCKNAMELEN];
np = VTONFS(vp);
nfscl_filllockowner(id, own, flags);
NFSLOCKCLSTATE();
LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len), nfso_hash) {
if (op->nfso_fhlen == np->n_fhp->nfh_len &&
!NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
if (lp->nfsl_inprog == p &&
!NFSBCMP(lp->nfsl_owner, own,
NFSV4CL_LOCKNAMELEN)) {
lp->nfsl_inprog = NULL;
nfscl_lockunlock(&lp->nfsl_rwlock);
}
}
}
}
nfscl_clrelease(clp);
NFSUNLOCKCLSTATE();
}
/*
* Called to find out if any bytes within the byte range specified are
* write locked by the calling process. Used to determine if flushing
* is required before a LockU.
* If in doubt, return 1, so the flush will occur.
*/
int
nfscl_checkwritelocked(vnode_t vp, struct flock *fl,
struct ucred *cred, NFSPROC_T *p, void *id, int flags)
{
struct nfscllockowner *lp;
struct nfsclopen *op;
struct nfsclclient *clp;
struct nfscllock *lop;
struct nfscldeleg *dp;
struct nfsnode *np;
u_int64_t off, end;
u_int8_t own[NFSV4CL_LOCKNAMELEN];
int error = 0;
np = VTONFS(vp);
switch (fl->l_whence) {
case SEEK_SET:
case SEEK_CUR:
/*
* Caller is responsible for adding any necessary offset
* when SEEK_CUR is used.
*/
off = fl->l_start;
break;
case SEEK_END:
off = np->n_size + fl->l_start;
break;
default:
return (1);
}
if (fl->l_len != 0) {
end = off + fl->l_len;
if (end < off)
return (1);
} else {
end = NFS64BITSSET;
}
error = nfscl_getcl(vp->v_mount, cred, p, false, true, &clp);
if (error)
return (1);
nfscl_filllockowner(id, own, flags);
NFSLOCKCLSTATE();
/*
* First check the delegation locks.
*/
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
if (dp != NULL) {
LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
if (!NFSBCMP(lp->nfsl_owner, own,
NFSV4CL_LOCKNAMELEN))
break;
}
if (lp != NULL) {
LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
if (lop->nfslo_first >= end)
break;
if (lop->nfslo_end <= off)
continue;
if (lop->nfslo_type == F_WRLCK) {
nfscl_clrelease(clp);
NFSUNLOCKCLSTATE();
return (1);
}
}
}
}
/*
* Now, check state against the server.
*/
LIST_FOREACH(op, NFSCLOPENHASH(clp, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len), nfso_hash) {
if (op->nfso_fhlen == np->n_fhp->nfh_len &&
!NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
if (!NFSBCMP(lp->nfsl_owner, own,
NFSV4CL_LOCKNAMELEN))
break;
}
if (lp != NULL) {
LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
if (lop->nfslo_first >= end)
break;
if (lop->nfslo_end <= off)
continue;
if (lop->nfslo_type == F_WRLCK) {
nfscl_clrelease(clp);
NFSUNLOCKCLSTATE();
return (1);
}
}
}
}
}
nfscl_clrelease(clp);
NFSUNLOCKCLSTATE();
return (0);
}
/*
* Release a byte range lock owner structure.
*/
void
nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete)
{
struct nfsclclient *clp;
if (lp == NULL)
return;
NFSLOCKCLSTATE();
clp = lp->nfsl_open->nfso_own->nfsow_clp;
if (error != 0 && candelete &&
(lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0)
nfscl_freelockowner(lp, 0);
else
nfscl_lockunlock(&lp->nfsl_rwlock);
nfscl_clrelease(clp);
NFSUNLOCKCLSTATE();
}
/*
* Unlink the open structure.
*/
static void
nfscl_unlinkopen(struct nfsclopen *op)
{
LIST_REMOVE(op, nfso_list);
if (op->nfso_hash.le_prev != NULL)
LIST_REMOVE(op, nfso_hash);
}
/*
* Free up an open structure and any associated byte range lock structures.
*/
void
nfscl_freeopen(struct nfsclopen *op, int local, bool unlink)
{
if (unlink)
nfscl_unlinkopen(op);
nfscl_freealllocks(&op->nfso_lock, local);
free(op, M_NFSCLOPEN);
if (local)
nfsstatsv1.cllocalopens--;
else
nfsstatsv1.clopens--;
}
/*
* Free up all lock owners and associated locks.
*/
static void
nfscl_freealllocks(struct nfscllockownerhead *lhp, int local)
{
struct nfscllockowner *lp, *nlp;
LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) {
if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
panic("nfscllckw");
nfscl_freelockowner(lp, local);
}
}
/*
* Called for an Open when NFSERR_EXPIRED is received from the server.
* If there are no byte range locks nor a Share Deny lost, try to do a
* fresh Open. Otherwise, free the open.
*/
static int
nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op,
struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p)
{
struct nfscllockowner *lp;
struct nfscldeleg *dp;
int mustdelete = 0, error;
/*
* Look for any byte range lock(s).
*/
LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
if (!LIST_EMPTY(&lp->nfsl_lock)) {
mustdelete = 1;
break;
}
}
/*
* If no byte range lock(s) nor a Share deny, try to re-open.
*/
if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) {
newnfs_copycred(&op->nfso_cred, cred);
dp = NULL;
error = nfsrpc_reopen(nmp, op->nfso_fh,
op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p);
if (error) {
mustdelete = 1;
if (dp != NULL) {
free(dp, M_NFSCLDELEG);
dp = NULL;
}
}
if (dp != NULL)
nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh,
op->nfso_fhlen, cred, p, &dp);
}
/*
* If a byte range lock or Share deny or couldn't re-open, free it.
*/
if (mustdelete)
nfscl_freeopen(op, 0, true);
return (mustdelete);
}
/*
* Free up an open owner structure.
*/
static void
nfscl_freeopenowner(struct nfsclowner *owp, int local)
{
LIST_REMOVE(owp, nfsow_list);
free(owp, M_NFSCLOWNER);
if (local)
nfsstatsv1.cllocalopenowners--;
else
nfsstatsv1.clopenowners--;
}
/*
* Free up a byte range lock owner structure.
*/
void
nfscl_freelockowner(struct nfscllockowner *lp, int local)
{
struct nfscllock *lop, *nlop;
LIST_REMOVE(lp, nfsl_list);
LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) {
nfscl_freelock(lop, local);
}
free(lp, M_NFSCLLOCKOWNER);
if (local)
nfsstatsv1.cllocallockowners--;
else
nfsstatsv1.cllockowners--;
}
/*
* Free up a byte range lock structure.
*/
void
nfscl_freelock(struct nfscllock *lop, int local)
{
LIST_REMOVE(lop, nfslo_list);
free(lop, M_NFSCLLOCK);
if (local)
nfsstatsv1.cllocallocks--;
else
nfsstatsv1.cllocks--;
}
/*
* Clean out the state related to a delegation.
*/
static void
nfscl_cleandeleg(struct nfscldeleg *dp)
{
struct nfsclowner *owp, *nowp;
struct nfsclopen *op;
LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
op = LIST_FIRST(&owp->nfsow_open);
if (op != NULL) {
if (LIST_NEXT(op, nfso_list) != NULL)
panic("nfscleandel");
nfscl_freeopen(op, 1, true);
}
nfscl_freeopenowner(owp, 1);
}
nfscl_freealllocks(&dp->nfsdl_lock, 1);
}
/*
* Free a delegation.
*/
static void
nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp, bool freeit)
{
TAILQ_REMOVE(hdp, dp, nfsdl_list);
LIST_REMOVE(dp, nfsdl_hash);
if (freeit)
free(dp, M_NFSCLDELEG);
nfsstatsv1.cldelegates--;
nfscl_delegcnt--;
}
/*
* Free up all state related to this client structure.
*/
static void
nfscl_cleanclient(struct nfsclclient *clp)
{
struct nfsclowner *owp, *nowp;
struct nfsclopen *op, *nop;
struct nfscllayout *lyp, *nlyp;
struct nfscldevinfo *dip, *ndip;
TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
nfscl_freelayout(lyp);
LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip)
nfscl_freedevinfo(dip);
/* Now, all the OpenOwners, etc. */
LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
nfscl_freeopen(op, 0, true);
}
nfscl_freeopenowner(owp, 0);
}
}
/*
* Called when an NFSERR_EXPIRED is received from the server.
*/
static void
nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp,
struct ucred *cred, NFSPROC_T *p)
{
struct nfsclowner *owp, *nowp, *towp;
struct nfsclopen *op, *nop, *top;
struct nfscldeleg *dp, *ndp;
int ret, printed = 0;
/*
* First, merge locally issued Opens into the list for the server.
*/
dp = TAILQ_FIRST(&clp->nfsc_deleg);
while (dp != NULL) {
ndp = TAILQ_NEXT(dp, nfsdl_list);
owp = LIST_FIRST(&dp->nfsdl_owner);
while (owp != NULL) {
nowp = LIST_NEXT(owp, nfsow_list);
op = LIST_FIRST(&owp->nfsow_open);
if (op != NULL) {
if (LIST_NEXT(op, nfso_list) != NULL)
panic("nfsclexp");
LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) {
if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner,
NFSV4CL_LOCKNAMELEN))
break;
}
if (towp != NULL) {
/* Merge opens in */
LIST_FOREACH(top, &towp->nfsow_open, nfso_list) {
if (top->nfso_fhlen == op->nfso_fhlen &&
!NFSBCMP(top->nfso_fh, op->nfso_fh,
op->nfso_fhlen)) {
top->nfso_mode |= op->nfso_mode;
top->nfso_opencnt += op->nfso_opencnt;
break;
}
}
if (top == NULL) {
/* Just add the open to the owner list */
LIST_REMOVE(op, nfso_list);
op->nfso_own = towp;
LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list);
LIST_INSERT_HEAD(NFSCLOPENHASH(clp, op->nfso_fh,
op->nfso_fhlen), op, nfso_hash);
nfsstatsv1.cllocalopens--;
nfsstatsv1.clopens++;
}
} else {
/* Just add the openowner to the client list */
LIST_REMOVE(owp, nfsow_list);
owp->nfsow_clp = clp;
LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list);
LIST_INSERT_HEAD(NFSCLOPENHASH(clp, op->nfso_fh,
op->nfso_fhlen), op, nfso_hash);
nfsstatsv1.cllocalopenowners--;
nfsstatsv1.clopenowners++;
nfsstatsv1.cllocalopens--;
nfsstatsv1.clopens++;
}
}
owp = nowp;
}
if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) {
printed = 1;
printf("nfsv4 expired locks lost\n");
}
nfscl_cleandeleg(dp);
nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
dp = ndp;
}
if (!TAILQ_EMPTY(&clp->nfsc_deleg))
panic("nfsclexp");
/*
* Now, try and reopen against the server.
*/
LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
owp->nfsow_seqid = 0;
LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
ret = nfscl_expireopen(clp, op, nmp, cred, p);
if (ret && !printed) {
printed = 1;
printf("nfsv4 expired locks lost\n");
}
}
if (LIST_EMPTY(&owp->nfsow_open))
nfscl_freeopenowner(owp, 0);
}
}
/*
* This function must be called after the process represented by "own" has
* exited. Must be called with CLSTATE lock held.
*/
static void
nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own)
{
struct nfsclowner *owp, *nowp;
struct nfscllockowner *lp, *nlp;
struct nfscldeleg *dp;
/* First, get rid of local locks on delegations. */
TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
panic("nfscllckw");
nfscl_freelockowner(lp, 1);
}
}
}
owp = LIST_FIRST(&clp->nfsc_owner);
while (owp != NULL) {
nowp = LIST_NEXT(owp, nfsow_list);
if (!NFSBCMP(owp->nfsow_owner, own,
NFSV4CL_LOCKNAMELEN)) {
/*
* If there are children that haven't closed the
* file descriptors yet, the opens will still be
* here. For that case, let the renew thread clear
* out the OpenOwner later.
*/
if (LIST_EMPTY(&owp->nfsow_open))
nfscl_freeopenowner(owp, 0);
else
owp->nfsow_defunct = 1;
}
owp = nowp;
}
}
/*
* Find open/lock owners for processes that have exited.
*/
static void
nfscl_cleanupkext(struct nfsclclient *clp, struct nfscllockownerfhhead *lhp)
{
struct nfsclowner *owp, *nowp;
struct nfsclopen *op;
struct nfscllockowner *lp, *nlp;
struct nfscldeleg *dp;
/*
* All the pidhash locks must be acquired, since they are sx locks
* and must be acquired before the mutexes. The pid(s) that will
* be used aren't known yet, so all the locks need to be acquired.
* Fortunately, this function is only performed once/sec.
*/
pidhash_slockall();
NFSLOCKCLSTATE();
LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
LIST_FOREACH_SAFE(lp, &op->nfso_lock, nfsl_list, nlp) {
if (LIST_EMPTY(&lp->nfsl_lock))
nfscl_emptylockowner(lp, lhp);
}
}
if (nfscl_procdoesntexist(owp->nfsow_owner))
nfscl_cleanup_common(clp, owp->nfsow_owner);
}
/*
* For the single open_owner case, these lock owners need to be
* checked to see if they still exist separately.
* This is because nfscl_procdoesntexist() never returns true for
* the single open_owner so that the above doesn't ever call
* nfscl_cleanup_common().
*/
TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
if (nfscl_procdoesntexist(lp->nfsl_owner))
nfscl_cleanup_common(clp, lp->nfsl_owner);
}
}
NFSUNLOCKCLSTATE();
pidhash_sunlockall();
}
/*
* Take the empty lock owner and move it to the local lhp list if the
* associated process no longer exists.
*/
static void
nfscl_emptylockowner(struct nfscllockowner *lp,
struct nfscllockownerfhhead *lhp)
{
struct nfscllockownerfh *lfhp, *mylfhp;
struct nfscllockowner *nlp;
int fnd_it;
/* If not a Posix lock owner, just return. */
if ((lp->nfsl_lockflags & F_POSIX) == 0)
return;
fnd_it = 0;
mylfhp = NULL;
/*
* First, search to see if this lock owner is already in the list.
* If it is, then the associated process no longer exists.
*/
SLIST_FOREACH(lfhp, lhp, nfslfh_list) {
if (lfhp->nfslfh_len == lp->nfsl_open->nfso_fhlen &&
!NFSBCMP(lfhp->nfslfh_fh, lp->nfsl_open->nfso_fh,
lfhp->nfslfh_len))
mylfhp = lfhp;
LIST_FOREACH(nlp, &lfhp->nfslfh_lock, nfsl_list)
if (!NFSBCMP(nlp->nfsl_owner, lp->nfsl_owner,
NFSV4CL_LOCKNAMELEN))
fnd_it = 1;
}
/* If not found, check if process still exists. */
if (fnd_it == 0 && nfscl_procdoesntexist(lp->nfsl_owner) == 0)
return;
/* Move the lock owner over to the local list. */
if (mylfhp == NULL) {
mylfhp = malloc(sizeof(struct nfscllockownerfh), M_TEMP,
M_NOWAIT);
if (mylfhp == NULL)
return;
mylfhp->nfslfh_len = lp->nfsl_open->nfso_fhlen;
NFSBCOPY(lp->nfsl_open->nfso_fh, mylfhp->nfslfh_fh,
mylfhp->nfslfh_len);
LIST_INIT(&mylfhp->nfslfh_lock);
SLIST_INSERT_HEAD(lhp, mylfhp, nfslfh_list);
}
LIST_REMOVE(lp, nfsl_list);
LIST_INSERT_HEAD(&mylfhp->nfslfh_lock, lp, nfsl_list);
}
static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */
/*
* Called from nfs umount to free up the clientid.
*/
void
nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p)
{
struct nfsclclient *clp;
struct ucred *cred;
int igotlock;
/*
* For the case that matters, this is the thread that set
* MNTK_UNMOUNTF, so it will see it set. The code that follows is
* done to ensure that any thread executing nfscl_getcl() after
* this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the
* mutex for NFSLOCKCLSTATE(), so it is "m" for the following
* explanation, courtesy of Alan Cox.
* What follows is a snippet from Alan Cox's email at:
* https://docs.FreeBSD.org/cgi/mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw
*
* 1. Set MNTK_UNMOUNTF
* 2. Acquire a standard FreeBSD mutex "m".
* 3. Update some data structures.
* 4. Release mutex "m".
*
* Then, other threads that acquire "m" after step 4 has occurred will
* see MNTK_UNMOUNTF as set. But, other threads that beat thread X to
* step 2 may or may not see MNTK_UNMOUNTF as set.
*/
NFSLOCKCLSTATE();
if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
fake_global++;
NFSUNLOCKCLSTATE();
NFSLOCKCLSTATE();
}
clp = nmp->nm_clp;
if (clp != NULL) {
if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0)
panic("nfscl umount");
/*
* First, handshake with the nfscl renew thread, to terminate
* it.
*/
clp->nfsc_flags |= NFSCLFLAGS_UMOUNT;
while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD)
(void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT,
"nfsclumnt", hz);
/*
* Now, get the exclusive lock on the client state, so
* that no uses of the state are still in progress.
*/
do {
igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
NFSCLSTATEMUTEXPTR, NULL);
} while (!igotlock);
NFSUNLOCKCLSTATE();
/*
* Free up all the state. It will expire on the server, but
* maybe we should do a SetClientId/SetClientIdConfirm so
* the server throws it away?
*/
LIST_REMOVE(clp, nfsc_list);
nfscl_delegreturnall(clp, p);
cred = newnfs_getcred();
if (NFSHASNFSV4N(nmp)) {
(void)nfsrpc_destroysession(nmp, clp, cred, p);
(void)nfsrpc_destroyclient(nmp, clp, cred, p);
} else
(void)nfsrpc_setclient(nmp, clp, 0, NULL, cred, p);
nfscl_cleanclient(clp);
nmp->nm_clp = NULL;
NFSFREECRED(cred);
free(clp, M_NFSCLCLIENT);
} else
NFSUNLOCKCLSTATE();
}
/*
* This function is called when a server replies with NFSERR_STALECLIENTID
* NFSERR_STALESTATEID or NFSERR_BADSESSION. It traverses the clientid lists,
* doing Opens and Locks with reclaim. If these fail, it deletes the
* corresponding state.
*/
static void
nfscl_recover(struct nfsclclient *clp, bool *retokp, struct ucred *cred,
NFSPROC_T *p)
{
struct nfsclowner *owp, *nowp;
struct nfsclopen *op, *nop;
struct nfscllockowner *lp, *nlp;
struct nfscllock *lop, *nlop;
struct nfscldeleg *dp, *ndp, *tdp;
struct nfsmount *nmp;
struct ucred *tcred;
struct nfsclopenhead extra_open;
struct nfscldeleghead extra_deleg;
struct nfsreq *rep;
u_int64_t len;
u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode;
int i, igotlock = 0, error, trycnt, firstlock;
struct nfscllayout *lyp, *nlyp;
bool recovered_one;
/*
* First, lock the client structure, so everyone else will
* block when trying to use state.
*/
NFSLOCKCLSTATE();
clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
do {
igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
NFSCLSTATEMUTEXPTR, NULL);
} while (!igotlock);
NFSUNLOCKCLSTATE();
nmp = clp->nfsc_nmp;
if (nmp == NULL)
panic("nfscl recover");
/*
* For now, just get rid of all layouts. There may be a need
* to do LayoutCommit Ops with reclaim == true later.
*/
TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp)
nfscl_freelayout(lyp);
TAILQ_INIT(&clp->nfsc_layout);
for (i = 0; i < NFSCLLAYOUTHASHSIZE; i++)
LIST_INIT(&clp->nfsc_layouthash[i]);
trycnt = 5;
tcred = NULL;
do {
error = nfsrpc_setclient(nmp, clp, 1, retokp, cred, p);
} while ((error == NFSERR_STALECLIENTID ||
error == NFSERR_BADSESSION ||
error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
if (error) {
NFSLOCKCLSTATE();
clp->nfsc_flags &= ~(NFSCLFLAGS_RECOVER |
NFSCLFLAGS_RECVRINPROG);
wakeup(&clp->nfsc_flags);
nfsv4_unlock(&clp->nfsc_lock, 0);
NFSUNLOCKCLSTATE();
return;
}
clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
/*
* Mark requests already queued on the server, so that they don't
* initiate another recovery cycle. Any requests already in the
* queue that handle state information will have the old stale
* clientid/stateid and will get a NFSERR_STALESTATEID,
* NFSERR_STALECLIENTID or NFSERR_BADSESSION reply from the server.
* This will be translated to NFSERR_STALEDONTRECOVER when
* R_DONTRECOVER is set.
*/
NFSLOCKREQ();
TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) {
if (rep->r_nmp == nmp)
rep->r_flags |= R_DONTRECOVER;
}
NFSUNLOCKREQ();
/*
* If nfsrpc_setclient() returns *retokp == true,
* no more recovery is needed.
*/
if (*retokp)
goto out;
/*
* Now, mark all delegations "need reclaim".
*/
TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list)
dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM;
TAILQ_INIT(&extra_deleg);
LIST_INIT(&extra_open);
/*
* Now traverse the state lists, doing Open and Lock Reclaims.
*/
tcred = newnfs_getcred();
recovered_one = false;
owp = LIST_FIRST(&clp->nfsc_owner);
while (owp != NULL) {
nowp = LIST_NEXT(owp, nfsow_list);
owp->nfsow_seqid = 0;
op = LIST_FIRST(&owp->nfsow_open);
while (op != NULL) {
nop = LIST_NEXT(op, nfso_list);
if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
/* Search for a delegation to reclaim with the open */
TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
continue;
if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
mode = NFSV4OPEN_ACCESSWRITE;
delegtype = NFSV4OPEN_DELEGATEWRITE;
} else {
mode = NFSV4OPEN_ACCESSREAD;
delegtype = NFSV4OPEN_DELEGATEREAD;
}
if ((op->nfso_mode & mode) == mode &&
op->nfso_fhlen == dp->nfsdl_fhlen &&
!NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen))
break;
}
ndp = dp;
if (dp == NULL)
delegtype = NFSV4OPEN_DELEGATENONE;
newnfs_copycred(&op->nfso_cred, tcred);
error = nfscl_tryopen(nmp, NULL, op->nfso_fh,
op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen,
op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype,
tcred, p);
if (!error) {
recovered_one = true;
/* Handle any replied delegation */
if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE)
|| NFSMNT_RDONLY(nmp->nm_mountp))) {
if ((ndp->nfsdl_flags & NFSCLDL_WRITE))
mode = NFSV4OPEN_ACCESSWRITE;
else
mode = NFSV4OPEN_ACCESSREAD;
TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
continue;
if ((op->nfso_mode & mode) == mode &&
op->nfso_fhlen == dp->nfsdl_fhlen &&
!NFSBCMP(op->nfso_fh, dp->nfsdl_fh,
op->nfso_fhlen)) {
dp->nfsdl_stateid = ndp->nfsdl_stateid;
dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit;
dp->nfsdl_ace = ndp->nfsdl_ace;
dp->nfsdl_change = ndp->nfsdl_change;
dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
if ((ndp->nfsdl_flags & NFSCLDL_RECALL))
dp->nfsdl_flags |= NFSCLDL_RECALL;
free(ndp, M_NFSCLDELEG);
ndp = NULL;
break;
}
}
}
if (ndp != NULL)
TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list);
/* and reclaim all byte range locks */
lp = LIST_FIRST(&op->nfso_lock);
while (lp != NULL) {
nlp = LIST_NEXT(lp, nfsl_list);
lp->nfsl_seqid = 0;
firstlock = 1;
lop = LIST_FIRST(&lp->nfsl_lock);
while (lop != NULL) {
nlop = LIST_NEXT(lop, nfslo_list);
if (lop->nfslo_end == NFS64BITSSET)
len = NFS64BITSSET;
else
len = lop->nfslo_end - lop->nfslo_first;
error = nfscl_trylock(nmp, NULL,
op->nfso_fh, op->nfso_fhlen, lp,
firstlock, 1, lop->nfslo_first, len,
lop->nfslo_type, tcred, p);
if (error != 0)
nfscl_freelock(lop, 0);
else
firstlock = 0;
lop = nlop;
}
/* If no locks, but a lockowner, just delete it. */
if (LIST_EMPTY(&lp->nfsl_lock))
nfscl_freelockowner(lp, 0);
lp = nlp;
}
} else if (error == NFSERR_NOGRACE && !recovered_one &&
NFSHASNFSV4N(nmp)) {
/*
* For NFSv4.1/4.2, the NFSERR_EXPIRED case will
* actually end up here, since the client will do
* a recovery for NFSERR_BADSESSION, but will get
* an NFSERR_NOGRACE reply for the first "reclaim"
* attempt.
* So, call nfscl_expireclient() to recover the
* opens as best we can and then do a reclaim
* complete and return.
*/
nfsrpc_reclaimcomplete(nmp, cred, p);
nfscl_expireclient(clp, nmp, tcred, p);
goto out;
}
}
if (error != 0 && error != NFSERR_BADSESSION)
nfscl_freeopen(op, 0, true);
op = nop;
}
owp = nowp;
}
/*
* Now, try and get any delegations not yet reclaimed by cobbling
* to-gether an appropriate open.
*/
nowp = NULL;
dp = TAILQ_FIRST(&clp->nfsc_deleg);
while (dp != NULL) {
ndp = TAILQ_NEXT(dp, nfsdl_list);
if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) {
if (nowp == NULL) {
nowp = malloc(
sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK);
/*
* Name must be as long an largest possible
* NFSV4CL_LOCKNAMELEN. 12 for now.
*/
NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner,
NFSV4CL_LOCKNAMELEN);
LIST_INIT(&nowp->nfsow_open);
nowp->nfsow_clp = clp;
nowp->nfsow_seqid = 0;
nowp->nfsow_defunct = 0;
nfscl_lockinit(&nowp->nfsow_rwlock);
}
nop = NULL;
if (error != NFSERR_NOGRACE && error != NFSERR_BADSESSION) {
nop = malloc(sizeof (struct nfsclopen) +
dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
nop->nfso_own = nowp;
if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
nop->nfso_mode = NFSV4OPEN_ACCESSWRITE;
delegtype = NFSV4OPEN_DELEGATEWRITE;
} else {
nop->nfso_mode = NFSV4OPEN_ACCESSREAD;
delegtype = NFSV4OPEN_DELEGATEREAD;
}
nop->nfso_opencnt = 0;
nop->nfso_posixlock = 1;
nop->nfso_fhlen = dp->nfsdl_fhlen;
NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen);
LIST_INIT(&nop->nfso_lock);
nop->nfso_stateid.seqid = 0;
nop->nfso_stateid.other[0] = 0;
nop->nfso_stateid.other[1] = 0;
nop->nfso_stateid.other[2] = 0;
newnfs_copycred(&dp->nfsdl_cred, tcred);
newnfs_copyincred(tcred, &nop->nfso_cred);
tdp = NULL;
error = nfscl_tryopen(nmp, NULL, nop->nfso_fh,
nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen,
nop->nfso_mode, nop, NULL, 0, &tdp, 1,
delegtype, tcred, p);
if (tdp != NULL) {
if ((tdp->nfsdl_flags & NFSCLDL_WRITE))
mode = NFSV4OPEN_ACCESSWRITE;
else
mode = NFSV4OPEN_ACCESSREAD;
if ((nop->nfso_mode & mode) == mode &&
nop->nfso_fhlen == tdp->nfsdl_fhlen &&
!NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh,
nop->nfso_fhlen)) {
dp->nfsdl_stateid = tdp->nfsdl_stateid;
dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit;
dp->nfsdl_ace = tdp->nfsdl_ace;
dp->nfsdl_change = tdp->nfsdl_change;
dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
if ((tdp->nfsdl_flags & NFSCLDL_RECALL))
dp->nfsdl_flags |= NFSCLDL_RECALL;
free(tdp, M_NFSCLDELEG);
} else {
TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list);
}
}
}
if (error) {
if (nop != NULL)
free(nop, M_NFSCLOPEN);
if (error == NFSERR_NOGRACE && !recovered_one &&
NFSHASNFSV4N(nmp)) {
/*
* For NFSv4.1/4.2, the NFSERR_EXPIRED case will
* actually end up here, since the client will do
* a recovery for NFSERR_BADSESSION, but will get
* an NFSERR_NOGRACE reply for the first "reclaim"
* attempt.
* So, call nfscl_expireclient() to recover the
* opens as best we can and then do a reclaim
* complete and return.
*/
nfsrpc_reclaimcomplete(nmp, cred, p);
nfscl_expireclient(clp, nmp, tcred, p);
free(nowp, M_NFSCLOWNER);
goto out;
}
/*
* Couldn't reclaim it, so throw the state
* away. Ouch!!
*/
nfscl_cleandeleg(dp);
nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
} else {
recovered_one = true;
LIST_INSERT_HEAD(&extra_open, nop, nfso_list);
}
}
dp = ndp;
}
/*
* Now, get rid of extra Opens and Delegations.
*/
LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) {
do {
newnfs_copycred(&op->nfso_cred, tcred);
error = nfscl_tryclose(op, tcred, nmp, p, true);
if (error == NFSERR_GRACE)
(void) nfs_catnap(PZERO, error, "nfsexcls");
} while (error == NFSERR_GRACE);
LIST_REMOVE(op, nfso_list);
free(op, M_NFSCLOPEN);
}
if (nowp != NULL)
free(nowp, M_NFSCLOWNER);
TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) {
do {
newnfs_copycred(&dp->nfsdl_cred, tcred);
error = nfscl_trydelegreturn(dp, tcred, nmp, p);
if (error == NFSERR_GRACE)
(void) nfs_catnap(PZERO, error, "nfsexdlg");
} while (error == NFSERR_GRACE);
TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list);
free(dp, M_NFSCLDELEG);
}
/* For NFSv4.1 or later, do a RECLAIM_COMPLETE. */
if (NFSHASNFSV4N(nmp))
(void)nfsrpc_reclaimcomplete(nmp, cred, p);
out:
NFSLOCKCLSTATE();
clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG;
wakeup(&clp->nfsc_flags);
nfsv4_unlock(&clp->nfsc_lock, 0);
NFSUNLOCKCLSTATE();
if (tcred != NULL)
NFSFREECRED(tcred);
}
/*
* This function is called when a server replies with NFSERR_EXPIRED.
* It deletes all state for the client and does a fresh SetClientId/confirm.
* XXX Someday it should post a signal to the process(es) that hold the
* state, so they know that lock state has been lost.
*/
int
nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p)
{
struct nfsmount *nmp;
struct ucred *cred;
int igotlock = 0, error, trycnt;
/*
* If the clientid has gone away or a new SetClientid has already
* been done, just return ok.
*/
if (clp == NULL || clidrev != clp->nfsc_clientidrev)
return (0);
/*
* First, lock the client structure, so everyone else will
* block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so
* that only one thread does the work.
*/
NFSLOCKCLSTATE();
clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT;
do {
igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
NFSCLSTATEMUTEXPTR, NULL);
} while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT));
if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) {
if (igotlock)
nfsv4_unlock(&clp->nfsc_lock, 0);
NFSUNLOCKCLSTATE();
return (0);
}
clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
NFSUNLOCKCLSTATE();
nmp = clp->nfsc_nmp;
if (nmp == NULL)
panic("nfscl expired");
cred = newnfs_getcred();
trycnt = 5;
do {
error = nfsrpc_setclient(nmp, clp, 0, NULL, cred, p);
} while ((error == NFSERR_STALECLIENTID ||
error == NFSERR_BADSESSION ||
error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
if (error) {
NFSLOCKCLSTATE();
clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
} else {
/*
* Expire the state for the client.
*/
nfscl_expireclient(clp, nmp, cred, p);
NFSLOCKCLSTATE();
clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
}
clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG);
wakeup(&clp->nfsc_flags);
nfsv4_unlock(&clp->nfsc_lock, 0);
NFSUNLOCKCLSTATE();
NFSFREECRED(cred);
return (error);
}
/*
* This function inserts a lock in the list after insert_lop.
*/
static void
nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop,
struct nfscllock *insert_lop, int local)
{
if ((struct nfscllockowner *)insert_lop == lp)
LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list);
else
LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list);
if (local)
nfsstatsv1.cllocallocks++;
else
nfsstatsv1.cllocks++;
}
/*
* This function updates the locking for a lock owner and given file. It
* maintains a list of lock ranges ordered on increasing file offset that
* are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style).
* It always adds new_lop to the list and sometimes uses the one pointed
* at by other_lopp.
* Returns 1 if the locks were modified, 0 otherwise.
*/
static int
nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp,
struct nfscllock **other_lopp, int local)
{
struct nfscllock *new_lop = *new_lopp;
struct nfscllock *lop, *tlop, *ilop;
struct nfscllock *other_lop;
int unlock = 0, modified = 0;
u_int64_t tmp;
/*
* Work down the list until the lock is merged.
*/
if (new_lop->nfslo_type == F_UNLCK)
unlock = 1;
ilop = (struct nfscllock *)lp;
lop = LIST_FIRST(&lp->nfsl_lock);
while (lop != NULL) {
/*
* Only check locks for this file that aren't before the start of
* new lock's range.
*/
if (lop->nfslo_end >= new_lop->nfslo_first) {
if (new_lop->nfslo_end < lop->nfslo_first) {
/*
* If the new lock ends before the start of the
* current lock's range, no merge, just insert
* the new lock.
*/
break;
}
if (new_lop->nfslo_type == lop->nfslo_type ||
(new_lop->nfslo_first <= lop->nfslo_first &&
new_lop->nfslo_end >= lop->nfslo_end)) {
/*
* This lock can be absorbed by the new lock/unlock.
* This happens when it covers the entire range
* of the old lock or is contiguous
* with the old lock and is of the same type or an
* unlock.
*/
if (new_lop->nfslo_type != lop->nfslo_type ||
new_lop->nfslo_first != lop->nfslo_first ||
new_lop->nfslo_end != lop->nfslo_end)
modified = 1;
if (lop->nfslo_first < new_lop->nfslo_first)
new_lop->nfslo_first = lop->nfslo_first;
if (lop->nfslo_end > new_lop->nfslo_end)
new_lop->nfslo_end = lop->nfslo_end;
tlop = lop;
lop = LIST_NEXT(lop, nfslo_list);
nfscl_freelock(tlop, local);
continue;
}
/*
* All these cases are for contiguous locks that are not the
* same type, so they can't be merged.
*/
if (new_lop->nfslo_first <= lop->nfslo_first) {
/*
* This case is where the new lock overlaps with the
* first part of the old lock. Move the start of the
* old lock to just past the end of the new lock. The
* new lock will be inserted in front of the old, since
* ilop hasn't been updated. (We are done now.)
*/
if (lop->nfslo_first != new_lop->nfslo_end) {
lop->nfslo_first = new_lop->nfslo_end;
modified = 1;
}
break;
}
if (new_lop->nfslo_end >= lop->nfslo_end) {
/*
* This case is where the new lock overlaps with the
* end of the old lock's range. Move the old lock's
* end to just before the new lock's first and insert
* the new lock after the old lock.
* Might not be done yet, since the new lock could
* overlap further locks with higher ranges.
*/
if (lop->nfslo_end != new_lop->nfslo_first) {
lop->nfslo_end = new_lop->nfslo_first;
modified = 1;
}
ilop = lop;
lop = LIST_NEXT(lop, nfslo_list);
continue;
}
/*
* The final case is where the new lock's range is in the
* middle of the current lock's and splits the current lock
* up. Use *other_lopp to handle the second part of the
* split old lock range. (We are done now.)
* For unlock, we use new_lop as other_lop and tmp, since
* other_lop and new_lop are the same for this case.
* We noted the unlock case above, so we don't need
* new_lop->nfslo_type any longer.
*/
tmp = new_lop->nfslo_first;
if (unlock) {
other_lop = new_lop;
*new_lopp = NULL;
} else {
other_lop = *other_lopp;
*other_lopp = NULL;
}
other_lop->nfslo_first = new_lop->nfslo_end;
other_lop->nfslo_end = lop->nfslo_end;
other_lop->nfslo_type = lop->nfslo_type;
lop->nfslo_end = tmp;
nfscl_insertlock(lp, other_lop, lop, local);
ilop = lop;
modified = 1;
break;
}
ilop = lop;
lop = LIST_NEXT(lop, nfslo_list);
if (lop == NULL)
break;
}
/*
* Insert the new lock in the list at the appropriate place.
*/
if (!unlock) {
nfscl_insertlock(lp, new_lop, ilop, local);
*new_lopp = NULL;
modified = 1;
}
return (modified);
}
/*
* This function must be run as a kernel thread.
* It does Renew Ops and recovery, when required.
*/
void
nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p)
{
struct nfsclowner *owp, *nowp;
struct nfsclopen *op;
struct nfscllockowner *lp, *nlp;
struct nfscldeleghead dh;
struct nfscldeleg *dp, *ndp;
struct ucred *cred;
u_int32_t clidrev;
int error, cbpathdown, islept, igotlock, ret, clearok;
uint32_t recover_done_time = 0;
time_t mytime;
static time_t prevsec = 0;
struct nfscllockownerfh *lfhp, *nlfhp;
struct nfscllockownerfhhead lfh;
struct nfscllayout *lyp, *nlyp;
struct nfscldevinfo *dip, *ndip;
struct nfscllayouthead rlh;
struct nfsclrecalllayout *recallp;
struct nfsclds *dsp;
bool retok;
struct mount *mp;
vnode_t vp;
cred = newnfs_getcred();
NFSLOCKCLSTATE();
clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD;
mp = clp->nfsc_nmp->nm_mountp;
NFSUNLOCKCLSTATE();
for(;;) {
newnfs_setroot(cred);
cbpathdown = 0;
if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) {
/*
* Only allow one full recover within 1/2 of the lease
* duration (nfsc_renew).
* retok is value/result. If passed in set to true,
* it indicates only a CreateSession operation should
* be attempted.
* If it is returned true, it indicates that the
* recovery only required a CreateSession.
*/
retok = true;
if (recover_done_time < NFSD_MONOSEC) {
recover_done_time = NFSD_MONOSEC +
clp->nfsc_renew;
retok = false;
}
NFSCL_DEBUG(1, "Doing recovery, only "
"createsession=%d\n", retok);
nfscl_recover(clp, &retok, cred, p);
}
if (clp->nfsc_expire <= NFSD_MONOSEC &&
(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) {
clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
clidrev = clp->nfsc_clientidrev;
error = nfsrpc_renew(clp, NULL, cred, p);
if (error == NFSERR_CBPATHDOWN)
cbpathdown = 1;
else if (error == NFSERR_STALECLIENTID ||
error == NFSERR_BADSESSION) {
NFSLOCKCLSTATE();
clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
NFSUNLOCKCLSTATE();
} else if (error == NFSERR_EXPIRED)
(void) nfscl_hasexpired(clp, clidrev, p);
}
checkdsrenew:
if (NFSHASNFSV4N(clp->nfsc_nmp)) {
/* Do renews for any DS sessions. */
NFSLOCKMNT(clp->nfsc_nmp);
/* Skip first entry, since the MDS is handled above. */
dsp = TAILQ_FIRST(&clp->nfsc_nmp->nm_sess);
if (dsp != NULL)
dsp = TAILQ_NEXT(dsp, nfsclds_list);
while (dsp != NULL) {
if (dsp->nfsclds_expire <= NFSD_MONOSEC &&
dsp->nfsclds_sess.nfsess_defunct == 0) {
dsp->nfsclds_expire = NFSD_MONOSEC +
clp->nfsc_renew;
NFSUNLOCKMNT(clp->nfsc_nmp);
(void)nfsrpc_renew(clp, dsp, cred, p);
goto checkdsrenew;
}
dsp = TAILQ_NEXT(dsp, nfsclds_list);
}
NFSUNLOCKMNT(clp->nfsc_nmp);
}
TAILQ_INIT(&dh);
NFSLOCKCLSTATE();
if (cbpathdown)
/* It's a Total Recall! */
nfscl_totalrecall(clp);
/*
* Now, handle defunct owners.
*/
LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
if (LIST_EMPTY(&owp->nfsow_open)) {
if (owp->nfsow_defunct != 0)
nfscl_freeopenowner(owp, 0);
}
}
/*
* Do the recall on any delegations. To avoid trouble, always
* come back up here after having slept.
*/
igotlock = 0;
tryagain:
dp = TAILQ_FIRST(&clp->nfsc_deleg);
while (dp != NULL) {
ndp = TAILQ_NEXT(dp, nfsdl_list);
if ((dp->nfsdl_flags & NFSCLDL_RECALL)) {
/*
* Wait for outstanding I/O ops to be done.
*/
if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
if (igotlock) {
nfsv4_unlock(&clp->nfsc_lock, 0);
igotlock = 0;
}
dp->nfsdl_rwlock.nfslock_lock |=
NFSV4LOCK_WANTED;
msleep(&dp->nfsdl_rwlock,
NFSCLSTATEMUTEXPTR, PVFS, "nfscld",
5 * hz);
if (NFSCL_FORCEDISM(mp))
goto terminate;
goto tryagain;
}
while (!igotlock) {
igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
&islept, NFSCLSTATEMUTEXPTR, mp);
if (igotlock == 0 && NFSCL_FORCEDISM(mp))
goto terminate;
if (islept)
goto tryagain;
}
NFSUNLOCKCLSTATE();
newnfs_copycred(&dp->nfsdl_cred, cred);
ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp,
NULL, cred, p, 1, &vp);
if (!ret) {
nfscl_cleandeleg(dp);
TAILQ_REMOVE(&clp->nfsc_deleg, dp,
nfsdl_list);
LIST_REMOVE(dp, nfsdl_hash);
TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
nfscl_delegcnt--;
nfsstatsv1.cldelegates--;
}
NFSLOCKCLSTATE();
/*
* The nfsc_lock must be released before doing
* vrele(), since it might call nfs_inactive().
* For the unlikely case where the vnode failed
* to be acquired by nfscl_recalldeleg(), a
* VOP_RECLAIM() should be in progress and it
* will return the delegation.
*/
nfsv4_unlock(&clp->nfsc_lock, 0);
igotlock = 0;
if (vp != NULL) {
NFSUNLOCKCLSTATE();
vrele(vp);
NFSLOCKCLSTATE();
}
goto tryagain;
}
dp = ndp;
}
/*
* Clear out old delegations, if we are above the high water
* mark. Only clear out ones with no state related to them.
* The tailq list is in LRU order.
*/
dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead);
while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) {
ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list);
if (dp->nfsdl_rwlock.nfslock_usecnt == 0 &&
dp->nfsdl_rwlock.nfslock_lock == 0 &&
dp->nfsdl_timestamp < NFSD_MONOSEC &&
(dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED |
NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) {
clearok = 1;
LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
op = LIST_FIRST(&owp->nfsow_open);
if (op != NULL) {
clearok = 0;
break;
}
}
if (clearok) {
LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
if (!LIST_EMPTY(&lp->nfsl_lock)) {
clearok = 0;
break;
}
}
}
if (clearok) {
TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
LIST_REMOVE(dp, nfsdl_hash);
TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
nfscl_delegcnt--;
nfsstatsv1.cldelegates--;
}
}
dp = ndp;
}
if (igotlock)
nfsv4_unlock(&clp->nfsc_lock, 0);
/*
* Do the recall on any layouts. To avoid trouble, always
* come back up here after having slept.
*/
TAILQ_INIT(&rlh);
tryagain2:
TAILQ_FOREACH_SAFE(lyp, &clp->nfsc_layout, nfsly_list, nlyp) {
if ((lyp->nfsly_flags & NFSLY_RECALL) != 0) {
/*
* Wait for outstanding I/O ops to be done.
*/
if (lyp->nfsly_lock.nfslock_usecnt > 0 ||
(lyp->nfsly_lock.nfslock_lock &
NFSV4LOCK_LOCK) != 0) {
lyp->nfsly_lock.nfslock_lock |=
NFSV4LOCK_WANTED;
msleep(&lyp->nfsly_lock.nfslock_lock,
NFSCLSTATEMUTEXPTR, PVFS, "nfslyp",
5 * hz);
if (NFSCL_FORCEDISM(mp))
goto terminate;
goto tryagain2;
}
/* Move the layout to the recall list. */
TAILQ_REMOVE(&clp->nfsc_layout, lyp,
nfsly_list);
LIST_REMOVE(lyp, nfsly_hash);
TAILQ_INSERT_HEAD(&rlh, lyp, nfsly_list);
/* Handle any layout commits. */
if (!NFSHASNOLAYOUTCOMMIT(clp->nfsc_nmp) &&
(lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
lyp->nfsly_flags &= ~NFSLY_WRITTEN;
NFSUNLOCKCLSTATE();
NFSCL_DEBUG(3, "do layoutcommit\n");
nfscl_dolayoutcommit(clp->nfsc_nmp, lyp,
cred, p);
NFSLOCKCLSTATE();
goto tryagain2;
}
}
}
/* Now, look for stale layouts. */
lyp = TAILQ_LAST(&clp->nfsc_layout, nfscllayouthead);
while (lyp != NULL) {
nlyp = TAILQ_PREV(lyp, nfscllayouthead, nfsly_list);
if (lyp->nfsly_timestamp < NFSD_MONOSEC &&
(lyp->nfsly_flags & NFSLY_RECALL) == 0 &&
lyp->nfsly_lock.nfslock_usecnt == 0 &&
lyp->nfsly_lock.nfslock_lock == 0) {
NFSCL_DEBUG(4, "ret stale lay=%d\n",
nfscl_layoutcnt);
recallp = malloc(sizeof(*recallp),
M_NFSLAYRECALL, M_NOWAIT);
if (recallp == NULL)
break;
(void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE,
lyp, NFSLAYOUTIOMODE_ANY, 0, UINT64_MAX,
lyp->nfsly_stateid.seqid, 0, 0, NULL,
recallp);
}
lyp = nlyp;
}
/*
* Free up any unreferenced device info structures.
*/
LIST_FOREACH_SAFE(dip, &clp->nfsc_devinfo, nfsdi_list, ndip) {
if (dip->nfsdi_layoutrefs == 0 &&
dip->nfsdi_refcnt == 0) {
NFSCL_DEBUG(4, "freeing devinfo\n");
LIST_REMOVE(dip, nfsdi_list);
nfscl_freedevinfo(dip);
}
}
NFSUNLOCKCLSTATE();
/* Do layout return(s), as required. */
TAILQ_FOREACH_SAFE(lyp, &rlh, nfsly_list, nlyp) {
TAILQ_REMOVE(&rlh, lyp, nfsly_list);
NFSCL_DEBUG(4, "ret layout\n");
nfscl_layoutreturn(clp->nfsc_nmp, lyp, cred, p);
nfscl_freelayout(lyp);
}
/*
* Delegreturn any delegations cleaned out or recalled.
*/
TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) {
newnfs_copycred(&dp->nfsdl_cred, cred);
(void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
TAILQ_REMOVE(&dh, dp, nfsdl_list);
free(dp, M_NFSCLDELEG);
}
SLIST_INIT(&lfh);
/*
* Call nfscl_cleanupkext() once per second to check for
* open/lock owners where the process has exited.
*/
mytime = NFSD_MONOSEC;
if (prevsec != mytime) {
prevsec = mytime;
nfscl_cleanupkext(clp, &lfh);
}
/*
* Do a ReleaseLockOwner for all lock owners where the
* associated process no longer exists, as found by
* nfscl_cleanupkext().
*/
newnfs_setroot(cred);
SLIST_FOREACH_SAFE(lfhp, &lfh, nfslfh_list, nlfhp) {
LIST_FOREACH_SAFE(lp, &lfhp->nfslfh_lock, nfsl_list,
nlp) {
(void)nfsrpc_rellockown(clp->nfsc_nmp, lp,
lfhp->nfslfh_fh, lfhp->nfslfh_len, cred,
p);
nfscl_freelockowner(lp, 0);
}
free(lfhp, M_TEMP);
}
SLIST_INIT(&lfh);
NFSLOCKCLSTATE();
if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0)
(void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl",
hz);
terminate:
if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) {
clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD;
NFSUNLOCKCLSTATE();
NFSFREECRED(cred);
wakeup((caddr_t)clp);
return;
}
NFSUNLOCKCLSTATE();
}
}
/*
* Initiate state recovery. Called when NFSERR_STALECLIENTID,
* NFSERR_STALESTATEID or NFSERR_BADSESSION is received.
*/
void
nfscl_initiate_recovery(struct nfsclclient *clp)
{
if (clp == NULL)
return;
NFSLOCKCLSTATE();
clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
NFSUNLOCKCLSTATE();
wakeup((caddr_t)clp);
}
/*
* Dump out the state stuff for debugging.
*/
void
nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens,
int lockowner, int locks)
{
struct nfsclclient *clp;
struct nfsclowner *owp;
struct nfsclopen *op;
struct nfscllockowner *lp;
struct nfscllock *lop;
struct nfscldeleg *dp;
clp = nmp->nm_clp;
if (clp == NULL) {
printf("nfscl dumpstate NULL clp\n");
return;
}
NFSLOCKCLSTATE();
TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
if (openowner && !LIST_EMPTY(&owp->nfsow_open))
printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
owp->nfsow_owner[0], owp->nfsow_owner[1],
owp->nfsow_owner[2], owp->nfsow_owner[3],
owp->nfsow_seqid);
LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
if (opens)
printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
op->nfso_stateid.other[0], op->nfso_stateid.other[1],
op->nfso_stateid.other[2], op->nfso_opencnt,
op->nfso_fh[12]);
LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
if (lockowner)
printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
lp->nfsl_owner[0], lp->nfsl_owner[1],
lp->nfsl_owner[2], lp->nfsl_owner[3],
lp->nfsl_seqid,
lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
lp->nfsl_stateid.other[2]);
LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
if (locks)
#ifdef __FreeBSD__
printf("lck typ=%d fst=%ju end=%ju\n",
lop->nfslo_type, (intmax_t)lop->nfslo_first,
(intmax_t)lop->nfslo_end);
#else
printf("lck typ=%d fst=%qd end=%qd\n",
lop->nfslo_type, lop->nfslo_first,
lop->nfslo_end);
#endif
}
}
}
}
}
LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
if (openowner && !LIST_EMPTY(&owp->nfsow_open))
printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
owp->nfsow_owner[0], owp->nfsow_owner[1],
owp->nfsow_owner[2], owp->nfsow_owner[3],
owp->nfsow_seqid);
LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
if (opens)
printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
op->nfso_stateid.other[0], op->nfso_stateid.other[1],
op->nfso_stateid.other[2], op->nfso_opencnt,
op->nfso_fh[12]);
LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
if (lockowner)
printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
lp->nfsl_owner[0], lp->nfsl_owner[1],
lp->nfsl_owner[2], lp->nfsl_owner[3],
lp->nfsl_seqid,
lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
lp->nfsl_stateid.other[2]);
LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
if (locks)
#ifdef __FreeBSD__
printf("lck typ=%d fst=%ju end=%ju\n",
lop->nfslo_type, (intmax_t)lop->nfslo_first,
(intmax_t)lop->nfslo_end);
#else
printf("lck typ=%d fst=%qd end=%qd\n",
lop->nfslo_type, lop->nfslo_first,
lop->nfslo_end);
#endif
}
}
}
}
NFSUNLOCKCLSTATE();
}
/*
* Check for duplicate open owners and opens.
* (Only used as a diagnostic aid.)
*/
void
nfscl_dupopen(vnode_t vp, int dupopens)
{
struct nfsclclient *clp;
struct nfsclowner *owp, *owp2;
struct nfsclopen *op, *op2;
struct nfsfh *nfhp;
clp = VFSTONFS(vp->v_mount)->nm_clp;
if (clp == NULL) {
printf("nfscl dupopen NULL clp\n");
return;
}
nfhp = VTONFS(vp)->n_fhp;
NFSLOCKCLSTATE();
/*
* First, search for duplicate owners.
* These should never happen!
*/
LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
if (owp != owp2 &&
!NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner,
NFSV4CL_LOCKNAMELEN)) {
NFSUNLOCKCLSTATE();
printf("DUP OWNER\n");
nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 0);
return;
}
}
}
/*
* Now, search for duplicate stateids.
* These shouldn't happen, either.
*/
LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
if (op != op2 &&
(op->nfso_stateid.other[0] != 0 ||
op->nfso_stateid.other[1] != 0 ||
op->nfso_stateid.other[2] != 0) &&
op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] &&
op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] &&
op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) {
NFSUNLOCKCLSTATE();
printf("DUP STATEID\n");
nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0, 0);
return;
}
}
}
}
}
/*
* Now search for duplicate opens.
* Duplicate opens for the same owner
* should never occur. Other duplicates are
* possible and are checked for if "dupopens"
* is true.
*/
LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
if (nfhp->nfh_len == op2->nfso_fhlen &&
!NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) {
LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
if (op != op2 && nfhp->nfh_len == op->nfso_fhlen &&
!NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) &&
(!NFSBCMP(op->nfso_own->nfsow_owner,
op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) ||
dupopens)) {
if (!NFSBCMP(op->nfso_own->nfsow_owner,
op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
NFSUNLOCKCLSTATE();
printf("BADDUP OPEN\n");
} else {
NFSUNLOCKCLSTATE();
printf("DUP OPEN\n");
}
nfscl_dumpstate(VFSTONFS(vp->v_mount), 1, 1, 0,
0);
return;
}
}
}
}
}
}
NFSUNLOCKCLSTATE();
}
/*
* During close, find an open that needs to be dereferenced and
* dereference it. If there are no more opens for this file,
* log a message to that effect.
* Opens aren't actually Close'd until VOP_INACTIVE() is performed
* on the file's vnode.
* This is the safe way, since it is difficult to identify
* which open the close is for and I/O can be performed after the
* close(2) system call when a file is mmap'd.
* If it returns 0 for success, there will be a referenced
* clp returned via clpp.
*/
int
nfscl_getclose(vnode_t vp, struct nfsclclient **clpp)
{
struct nfsclclient *clp;
struct nfsclowner *owp;
struct nfsclopen *op;
struct nfscldeleg *dp;
struct nfsfh *nfhp;
int error, notdecr;
error = nfscl_getcl(vp->v_mount, NULL, NULL, false, true, &clp);
if (error)
return (error);
*clpp = clp;
nfhp = VTONFS(vp)->n_fhp;
notdecr = 1;
NFSLOCKCLSTATE();
/*
* First, look for one under a delegation that was locally issued
* and just decrement the opencnt for it. Since all my Opens against
* the server are DENY_NONE, I don't see a problem with hanging
* onto them. (It is much easier to use one of the extant Opens
* that I already have on the server when a Delegation is recalled
* than to do fresh Opens.) Someday, I might need to rethink this, but.
*/
dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
if (dp != NULL) {
LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
op = LIST_FIRST(&owp->nfsow_open);
if (op != NULL) {
/*
* Since a delegation is for a file, there
* should never be more than one open for
* each openowner.
*/
if (LIST_NEXT(op, nfso_list) != NULL)
panic("nfscdeleg opens");
if (notdecr && op->nfso_opencnt > 0) {
notdecr = 0;
op->nfso_opencnt--;
break;
}
}
}
}
/* Now process the opens against the server. */
LIST_FOREACH(op, NFSCLOPENHASH(clp, nfhp->nfh_fh, nfhp->nfh_len),
nfso_hash) {
if (op->nfso_fhlen == nfhp->nfh_len &&
!NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
nfhp->nfh_len)) {
/* Found an open, decrement cnt if possible */
if (notdecr && op->nfso_opencnt > 0) {
notdecr = 0;
op->nfso_opencnt--;
}
/*
* There are more opens, so just return.
*/
if (op->nfso_opencnt > 0) {
NFSUNLOCKCLSTATE();
return (0);
}
}
}
NFSUNLOCKCLSTATE();
if (notdecr)
printf("nfscl: never fnd open\n");
return (0);
}
int
nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p)
{
struct nfsclclient *clp;
struct nfsmount *nmp;
struct nfsclowner *owp, *nowp;
struct nfsclopen *op, *nop;
struct nfsclopenhead delayed;
struct nfscldeleg *dp;
struct nfsfh *nfhp;
struct nfsclrecalllayout *recallp;
int error;
error = nfscl_getcl(vp->v_mount, NULL, NULL, false, true, &clp);
if (error)
return (error);
*clpp = clp;
nmp = VFSTONFS(vp->v_mount);
nfhp = VTONFS(vp)->n_fhp;
recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK);
NFSLOCKCLSTATE();
/*
* First get rid of the local Open structures, which should be no
* longer in use.
*/
dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
if (dp != NULL) {
LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
op = LIST_FIRST(&owp->nfsow_open);
if (op != NULL) {
KASSERT((op->nfso_opencnt == 0),
("nfscl: bad open cnt on deleg"));
nfscl_freeopen(op, 1, true);
}
nfscl_freeopenowner(owp, 1);
}
}
/* Return any layouts marked return on close. */
nfscl_retoncloselayout(vp, clp, nfhp->nfh_fh, nfhp->nfh_len, &recallp);
/* Now process the opens against the server. */
LIST_INIT(&delayed);
lookformore:
LIST_FOREACH(op, NFSCLOPENHASH(clp, nfhp->nfh_fh, nfhp->nfh_len),
nfso_hash) {
if (op->nfso_fhlen == nfhp->nfh_len &&
!NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
nfhp->nfh_len)) {
/* Found an open, close it. */
#ifdef DIAGNOSTIC
KASSERT((op->nfso_opencnt == 0),
("nfscl: bad open cnt on server (%d)",
op->nfso_opencnt));
#endif
NFSUNLOCKCLSTATE();
if (NFSHASNFSV4N(nmp))
error = nfsrpc_doclose(nmp, op, p, false, true);
else
error = nfsrpc_doclose(nmp, op, p, true, true);
NFSLOCKCLSTATE();
if (error == NFSERR_DELAY) {
nfscl_unlinkopen(op);
op->nfso_own = NULL;
LIST_INSERT_HEAD(&delayed, op, nfso_list);
}
goto lookformore;
}
}
nfscl_clrelease(clp);
NFSUNLOCKCLSTATE();
/*
* recallp has been set NULL by nfscl_retoncloselayout() if it was
* used by the function, but calling free() with a NULL pointer is ok.
*/
free(recallp, M_NFSLAYRECALL);
/* Now, loop retrying the delayed closes. */
LIST_FOREACH_SAFE(op, &delayed, nfso_list, nop) {
nfsrpc_doclose(nmp, op, p, true, false);
LIST_REMOVE(op, nfso_list);
nfscl_freeopen(op, 0, false);
}
return (0);
}
/*
* Return all delegations on this client.
* (Must be called with client sleep lock.)
*/
static void
nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p)
{
struct nfscldeleg *dp, *ndp;
struct ucred *cred;
cred = newnfs_getcred();
TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) {
nfscl_cleandeleg(dp);
(void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
}
NFSFREECRED(cred);
}
/*
* Return any delegation for this vp.
*/
void
nfscl_delegreturnvp(vnode_t vp, NFSPROC_T *p)
{
struct nfsclclient *clp;
struct nfscldeleg *dp;
struct ucred *cred;
struct nfsnode *np;
struct nfsmount *nmp;
nmp = VFSTONFS(vp->v_mount);
NFSLOCKMNT(nmp);
if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
NFSUNLOCKMNT(nmp);
return;
}
NFSUNLOCKMNT(nmp);
np = VTONFS(vp);
cred = newnfs_getcred();
dp = NULL;
NFSLOCKCLSTATE();
clp = nmp->nm_clp;
if (clp != NULL)
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len);
if (dp != NULL) {
nfscl_cleandeleg(dp);
nfscl_freedeleg(&clp->nfsc_deleg, dp, false);
NFSUNLOCKCLSTATE();
newnfs_copycred(&dp->nfsdl_cred, cred);
nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
free(dp, M_NFSCLDELEG);
} else
NFSUNLOCKCLSTATE();
NFSFREECRED(cred);
}
/*
* Do a callback RPC.
*/
void
nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p)
{
int clist, gotseq_ok, i, j, k, op, rcalls;
u_int32_t *tl;
struct nfsclclient *clp;
struct nfscldeleg *dp = NULL;
int numops, taglen = -1, error = 0, trunc __unused;
u_int32_t minorvers = 0, retops = 0, *retopsp = NULL, *repp, cbident;
u_char tag[NFSV4_SMALLSTR + 1], *tagstr;
vnode_t vp = NULL;
struct nfsnode *np;
struct vattr va;
struct nfsfh *nfhp;
mount_t mp;
nfsattrbit_t attrbits, rattrbits;
nfsv4stateid_t stateid;
uint32_t seqid, slotid = 0, highslot, cachethis __unused;
uint8_t sessionid[NFSX_V4SESSIONID];
struct mbuf *rep;
struct nfscllayout *lyp;
uint64_t filesid[2], len, off;
int changed, gotone, laytype, recalltype;
uint32_t iomode;
struct nfsclrecalllayout *recallp = NULL;
struct nfsclsession *tsep;
gotseq_ok = 0;
nfsrvd_rephead(nd);
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
taglen = fxdr_unsigned(int, *tl);
if (taglen < 0) {
error = EBADRPC;
goto nfsmout;
}
if (taglen <= NFSV4_SMALLSTR)
tagstr = tag;
else
tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
error = nfsrv_mtostr(nd, tagstr, taglen);
if (error) {
if (taglen > NFSV4_SMALLSTR)
free(tagstr, M_TEMP);
taglen = -1;
goto nfsmout;
}
(void) nfsm_strtom(nd, tag, taglen);
if (taglen > NFSV4_SMALLSTR) {
free(tagstr, M_TEMP);
}
NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED);
NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
minorvers = fxdr_unsigned(u_int32_t, *tl++);
if (minorvers != NFSV4_MINORVERSION &&
minorvers != NFSV41_MINORVERSION &&
minorvers != NFSV42_MINORVERSION)
nd->nd_repstat = NFSERR_MINORVERMISMATCH;
cbident = fxdr_unsigned(u_int32_t, *tl++);
if (nd->nd_repstat)
numops = 0;
else
numops = fxdr_unsigned(int, *tl);
/*
* Loop around doing the sub ops.
*/
for (i = 0; i < numops; i++) {
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED);
*repp++ = *tl;
op = fxdr_unsigned(int, *tl);
if (op < NFSV4OP_CBGETATTR ||
(op > NFSV4OP_CBRECALL && minorvers == NFSV4_MINORVERSION) ||
(op > NFSV4OP_CBNOTIFYDEVID &&
minorvers == NFSV41_MINORVERSION) ||
(op > NFSV4OP_CBOFFLOAD &&
minorvers == NFSV42_MINORVERSION)) {
nd->nd_repstat = NFSERR_OPILLEGAL;
*repp = nfscl_errmap(nd, minorvers);
retops++;
break;
}
nd->nd_procnum = op;
if (op < NFSV42_CBNOPS)
nfsstatsv1.cbrpccnt[nd->nd_procnum]++;
switch (op) {
case NFSV4OP_CBGETATTR:
NFSCL_DEBUG(4, "cbgetattr\n");
mp = NULL;
vp = NULL;
error = nfsm_getfh(nd, &nfhp);
if (!error)
error = nfsrv_getattrbits(nd, &attrbits,
NULL, NULL);
if (error == 0 && i == 0 &&
minorvers != NFSV4_MINORVERSION)
error = NFSERR_OPNOTINSESS;
if (!error) {
mp = nfscl_getmnt(minorvers, sessionid, cbident,
&clp);
if (mp == NULL)
error = NFSERR_SERVERFAULT;
}
if (!error) {
error = nfscl_ngetreopen(mp, nfhp->nfh_fh,
nfhp->nfh_len, p, &np);
if (!error)
vp = NFSTOV(np);
}
if (!error) {
NFSZERO_ATTRBIT(&rattrbits);
NFSLOCKCLSTATE();
dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
nfhp->nfh_len);
if (dp != NULL) {
if (NFSISSET_ATTRBIT(&attrbits,
NFSATTRBIT_SIZE)) {
if (vp != NULL)
va.va_size = np->n_size;
else
va.va_size =
dp->nfsdl_size;
NFSSETBIT_ATTRBIT(&rattrbits,
NFSATTRBIT_SIZE);
}
if (NFSISSET_ATTRBIT(&attrbits,
NFSATTRBIT_CHANGE)) {
va.va_filerev =
dp->nfsdl_change;
if (vp == NULL ||
(np->n_flag & NDELEGMOD))
va.va_filerev++;
NFSSETBIT_ATTRBIT(&rattrbits,
NFSATTRBIT_CHANGE);
}
} else
error = NFSERR_SERVERFAULT;
NFSUNLOCKCLSTATE();
}
if (vp != NULL)
vrele(vp);
if (mp != NULL)
vfs_unbusy(mp);
if (nfhp != NULL)
free(nfhp, M_NFSFH);
if (!error)
(void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va,
NULL, 0, &rattrbits, NULL, p, 0, 0, 0, 0,
(uint64_t)0, NULL);
break;
case NFSV4OP_CBRECALL:
NFSCL_DEBUG(4, "cbrecall\n");
NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
NFSX_UNSIGNED);
stateid.seqid = *tl++;
NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other,
NFSX_STATEIDOTHER);
tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
trunc = fxdr_unsigned(int, *tl);
error = nfsm_getfh(nd, &nfhp);
if (error == 0 && i == 0 &&
minorvers != NFSV4_MINORVERSION)
error = NFSERR_OPNOTINSESS;
if (!error) {
NFSLOCKCLSTATE();
if (minorvers == NFSV4_MINORVERSION)
clp = nfscl_getclnt(cbident);
else
clp = nfscl_getclntsess(sessionid);
if (clp != NULL) {
dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
nfhp->nfh_len);
if (dp != NULL && (dp->nfsdl_flags &
NFSCLDL_DELEGRET) == 0) {
dp->nfsdl_flags |=
NFSCLDL_RECALL;
wakeup((caddr_t)clp);
}
} else {
error = NFSERR_SERVERFAULT;
}
NFSUNLOCKCLSTATE();
}
if (nfhp != NULL)
free(nfhp, M_NFSFH);
break;
case NFSV4OP_CBLAYOUTRECALL:
NFSCL_DEBUG(4, "cblayrec\n");
nfhp = NULL;
NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED);
laytype = fxdr_unsigned(int, *tl++);
iomode = fxdr_unsigned(uint32_t, *tl++);
if (newnfs_true == *tl++)
changed = 1;
else
changed = 0;
recalltype = fxdr_unsigned(int, *tl);
NFSCL_DEBUG(4, "layt=%d iom=%d ch=%d rectyp=%d\n",
laytype, iomode, changed, recalltype);
recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL,
M_WAITOK);
if (laytype != NFSLAYOUT_NFSV4_1_FILES &&
laytype != NFSLAYOUT_FLEXFILE)
error = NFSERR_NOMATCHLAYOUT;
else if (recalltype == NFSLAYOUTRETURN_FILE) {
error = nfsm_getfh(nd, &nfhp);
NFSCL_DEBUG(4, "retfile getfh=%d\n", error);
if (error != 0)
goto nfsmout;
NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER +
NFSX_STATEID);
off = fxdr_hyper(tl); tl += 2;
len = fxdr_hyper(tl); tl += 2;
stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
if (minorvers == NFSV4_MINORVERSION)
error = NFSERR_NOTSUPP;
else if (i == 0)
error = NFSERR_OPNOTINSESS;
NFSCL_DEBUG(4, "off=%ju len=%ju sq=%u err=%d\n",
(uintmax_t)off, (uintmax_t)len,
stateid.seqid, error);
if (error == 0) {
NFSLOCKCLSTATE();
clp = nfscl_getclntsess(sessionid);
NFSCL_DEBUG(4, "cbly clp=%p\n", clp);
if (clp != NULL) {
lyp = nfscl_findlayout(clp,
nfhp->nfh_fh,
nfhp->nfh_len);
NFSCL_DEBUG(4, "cblyp=%p\n",
lyp);
if (lyp != NULL &&
(lyp->nfsly_flags &
(NFSLY_FILES |
NFSLY_FLEXFILE)) != 0 &&
!NFSBCMP(stateid.other,
lyp->nfsly_stateid.other,
NFSX_STATEIDOTHER)) {
error =
nfscl_layoutrecall(
recalltype,
lyp, iomode, off,
len, stateid.seqid,
0, 0, NULL,
recallp);
if (error == 0 &&
stateid.seqid >
lyp->nfsly_stateid.seqid)
lyp->nfsly_stateid.seqid =
stateid.seqid;
recallp = NULL;
wakeup(clp);
NFSCL_DEBUG(4,
"aft layrcal=%d "
"layseqid=%d\n",
error,
lyp->nfsly_stateid.seqid);
} else
error =
NFSERR_NOMATCHLAYOUT;
} else
error = NFSERR_NOMATCHLAYOUT;
NFSUNLOCKCLSTATE();
}
free(nfhp, M_NFSFH);
} else if (recalltype == NFSLAYOUTRETURN_FSID) {
NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER);
filesid[0] = fxdr_hyper(tl); tl += 2;
filesid[1] = fxdr_hyper(tl); tl += 2;
gotone = 0;
NFSLOCKCLSTATE();
clp = nfscl_getclntsess(sessionid);
if (clp != NULL) {
TAILQ_FOREACH(lyp, &clp->nfsc_layout,
nfsly_list) {
if (lyp->nfsly_filesid[0] ==
filesid[0] &&
lyp->nfsly_filesid[1] ==
filesid[1]) {
error =
nfscl_layoutrecall(
recalltype,
lyp, iomode, 0,
UINT64_MAX,
lyp->nfsly_stateid.seqid,
0, 0, NULL,
recallp);
recallp = NULL;
gotone = 1;
}
}
if (gotone != 0)
wakeup(clp);
else
error = NFSERR_NOMATCHLAYOUT;
} else
error = NFSERR_NOMATCHLAYOUT;
NFSUNLOCKCLSTATE();
} else if (recalltype == NFSLAYOUTRETURN_ALL) {
gotone = 0;
NFSLOCKCLSTATE();
clp = nfscl_getclntsess(sessionid);
if (clp != NULL) {
TAILQ_FOREACH(lyp, &clp->nfsc_layout,
nfsly_list) {
error = nfscl_layoutrecall(
recalltype, lyp, iomode, 0,
UINT64_MAX,
lyp->nfsly_stateid.seqid,
0, 0, NULL, recallp);
recallp = NULL;
gotone = 1;
}
if (gotone != 0)
wakeup(clp);
else
error = NFSERR_NOMATCHLAYOUT;
} else
error = NFSERR_NOMATCHLAYOUT;
NFSUNLOCKCLSTATE();
} else
error = NFSERR_NOMATCHLAYOUT;
if (recallp != NULL) {
free(recallp, M_NFSLAYRECALL);
recallp = NULL;
}
break;
case NFSV4OP_CBSEQUENCE:
NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
5 * NFSX_UNSIGNED);
bcopy(tl, sessionid, NFSX_V4SESSIONID);
tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
seqid = fxdr_unsigned(uint32_t, *tl++);
slotid = fxdr_unsigned(uint32_t, *tl++);
highslot = fxdr_unsigned(uint32_t, *tl++);
cachethis = *tl++;
/* Throw away the referring call stuff. */
clist = fxdr_unsigned(int, *tl);
for (j = 0; j < clist; j++) {
NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID +
NFSX_UNSIGNED);
tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
rcalls = fxdr_unsigned(int, *tl);
for (k = 0; k < rcalls; k++) {
NFSM_DISSECT(tl, uint32_t *,
2 * NFSX_UNSIGNED);
}
}
NFSLOCKCLSTATE();
if (i == 0) {
clp = nfscl_getclntsess(sessionid);
if (clp == NULL)
error = NFSERR_SERVERFAULT;
} else
error = NFSERR_SEQUENCEPOS;
if (error == 0) {
tsep = nfsmnt_mdssession(clp->nfsc_nmp);
error = nfsv4_seqsession(seqid, slotid,
highslot, tsep->nfsess_cbslots, &rep,
tsep->nfsess_backslots);
}
NFSUNLOCKCLSTATE();
if (error == 0 || error == NFSERR_REPLYFROMCACHE) {
gotseq_ok = 1;
if (rep != NULL) {
/*
* Handle a reply for a retried
* callback. The reply will be
* re-inserted in the session cache
* by the nfsv4_seqsess_cacherep() call
* after out:
*/
KASSERT(error == NFSERR_REPLYFROMCACHE,
("cbsequence: non-NULL rep"));
NFSCL_DEBUG(4, "Got cbretry\n");
m_freem(nd->nd_mreq);
nd->nd_mreq = rep;
rep = NULL;
goto out;
}
NFSM_BUILD(tl, uint32_t *,
NFSX_V4SESSIONID + 4 * NFSX_UNSIGNED);
bcopy(sessionid, tl, NFSX_V4SESSIONID);
tl += NFSX_V4SESSIONID / NFSX_UNSIGNED;
*tl++ = txdr_unsigned(seqid);
*tl++ = txdr_unsigned(slotid);
*tl++ = txdr_unsigned(NFSV4_CBSLOTS - 1);
*tl = txdr_unsigned(NFSV4_CBSLOTS - 1);
}
break;
default:
if (i == 0 && minorvers != NFSV4_MINORVERSION)
error = NFSERR_OPNOTINSESS;
else {
NFSCL_DEBUG(1, "unsupp callback %d\n", op);
error = NFSERR_NOTSUPP;
}
break;
}
if (error) {
if (error == EBADRPC || error == NFSERR_BADXDR) {
nd->nd_repstat = NFSERR_BADXDR;
} else {
nd->nd_repstat = error;
}
error = 0;
}
retops++;
if (nd->nd_repstat) {
*repp = nfscl_errmap(nd, minorvers);
break;
} else
*repp = 0; /* NFS4_OK */
}
nfsmout:
if (recallp != NULL)
free(recallp, M_NFSLAYRECALL);
if (error) {
if (error == EBADRPC || error == NFSERR_BADXDR)
nd->nd_repstat = NFSERR_BADXDR;
else
printf("nfsv4 comperr1=%d\n", error);
}
if (taglen == -1) {
NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
*tl++ = 0;
*tl = 0;
} else {
*retopsp = txdr_unsigned(retops);
}
*nd->nd_errp = nfscl_errmap(nd, minorvers);
out:
if (gotseq_ok != 0) {
rep = m_copym(nd->nd_mreq, 0, M_COPYALL, M_WAITOK);
NFSLOCKCLSTATE();
clp = nfscl_getclntsess(sessionid);
if (clp != NULL) {
tsep = nfsmnt_mdssession(clp->nfsc_nmp);
nfsv4_seqsess_cacherep(slotid, tsep->nfsess_cbslots,
NFSERR_OK, &rep);
NFSUNLOCKCLSTATE();
} else {
NFSUNLOCKCLSTATE();
m_freem(rep);
}
}
}
/*
* Generate the next cbident value. Basically just increment a static value
* and then check that it isn't already in the list, if it has wrapped around.
*/
static u_int32_t
nfscl_nextcbident(void)
{
struct nfsclclient *clp;
int matched;
static u_int32_t nextcbident = 0;
static int haswrapped = 0;
nextcbident++;
if (nextcbident == 0)
haswrapped = 1;
if (haswrapped) {
/*
* Search the clientid list for one already using this cbident.
*/
do {
matched = 0;
NFSLOCKCLSTATE();
LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
if (clp->nfsc_cbident == nextcbident) {
matched = 1;
break;
}
}
NFSUNLOCKCLSTATE();
if (matched == 1)
nextcbident++;
} while (matched);
}
return (nextcbident);
}
/*
* Get the mount point related to a given cbident or session and busy it.
*/
static mount_t
nfscl_getmnt(int minorvers, uint8_t *sessionid, u_int32_t cbident,
struct nfsclclient **clpp)
{
struct nfsclclient *clp;
mount_t mp;
int error;
struct nfsclsession *tsep;
*clpp = NULL;
NFSLOCKCLSTATE();
LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
tsep = nfsmnt_mdssession(clp->nfsc_nmp);
if (minorvers == NFSV4_MINORVERSION) {
if (clp->nfsc_cbident == cbident)
break;
} else if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
NFSX_V4SESSIONID))
break;
}
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return (NULL);
}
mp = clp->nfsc_nmp->nm_mountp;
vfs_ref(mp);
NFSUNLOCKCLSTATE();
error = vfs_busy(mp, 0);
vfs_rel(mp);
if (error != 0)
return (NULL);
*clpp = clp;
return (mp);
}
/*
* Get the clientid pointer related to a given cbident.
*/
static struct nfsclclient *
nfscl_getclnt(u_int32_t cbident)
{
struct nfsclclient *clp;
LIST_FOREACH(clp, &nfsclhead, nfsc_list)
if (clp->nfsc_cbident == cbident)
break;
return (clp);
}
/*
* Get the clientid pointer related to a given sessionid.
*/
static struct nfsclclient *
nfscl_getclntsess(uint8_t *sessionid)
{
struct nfsclclient *clp;
struct nfsclsession *tsep;
LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
tsep = nfsmnt_mdssession(clp->nfsc_nmp);
if (!NFSBCMP(tsep->nfsess_sessionid, sessionid,
NFSX_V4SESSIONID))
break;
}
return (clp);
}
/*
* Search for a lock conflict locally on the client. A conflict occurs if
* - not same owner and overlapping byte range and at least one of them is
* a write lock or this is an unlock.
*/
static int
nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen,
struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp,
struct nfscllock **lopp)
{
struct nfsclopen *op;
int ret;
if (dp != NULL) {
ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp);
if (ret)
return (ret);
}
LIST_FOREACH(op, NFSCLOPENHASH(clp, fhp, fhlen), nfso_hash) {
if (op->nfso_fhlen == fhlen &&
!NFSBCMP(op->nfso_fh, fhp, fhlen)) {
ret = nfscl_checkconflict(&op->nfso_lock, nlop,
own, lopp);
if (ret)
return (ret);
}
}
return (0);
}
static int
nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop,
u_int8_t *own, struct nfscllock **lopp)
{
struct nfscllockowner *lp;
struct nfscllock *lop;
LIST_FOREACH(lp, lhp, nfsl_list) {
if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
if (lop->nfslo_first >= nlop->nfslo_end)
break;
if (lop->nfslo_end <= nlop->nfslo_first)
continue;
if (lop->nfslo_type == F_WRLCK ||
nlop->nfslo_type == F_WRLCK ||
nlop->nfslo_type == F_UNLCK) {
if (lopp != NULL)
*lopp = lop;
return (NFSERR_DENIED);
}
}
}
}
return (0);
}
/*
* Check for a local conflicting lock.
*/
int
nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off,
u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags)
{
struct nfscllock *lop, nlck;
struct nfscldeleg *dp;
struct nfsnode *np;
u_int8_t own[NFSV4CL_LOCKNAMELEN];
int error;
nlck.nfslo_type = fl->l_type;
nlck.nfslo_first = off;
if (len == NFS64BITSSET) {
nlck.nfslo_end = NFS64BITSSET;
} else {
nlck.nfslo_end = off + len;
if (nlck.nfslo_end <= nlck.nfslo_first)
return (NFSERR_INVAL);
}
np = VTONFS(vp);
nfscl_filllockowner(id, own, flags);
NFSLOCKCLSTATE();
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
&nlck, own, dp, &lop);
if (error != 0) {
fl->l_whence = SEEK_SET;
fl->l_start = lop->nfslo_first;
if (lop->nfslo_end == NFS64BITSSET)
fl->l_len = 0;
else
fl->l_len = lop->nfslo_end - lop->nfslo_first;
fl->l_pid = (pid_t)0;
fl->l_type = lop->nfslo_type;
error = -1; /* no RPC required */
} else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) ||
fl->l_type == F_RDLCK)) {
/*
* The delegation ensures that there isn't a conflicting
* lock on the server, so return -1 to indicate an RPC
* isn't required.
*/
fl->l_type = F_UNLCK;
error = -1;
}
NFSUNLOCKCLSTATE();
return (error);
}
/*
* Handle Recall of a delegation.
* The clp must be exclusive locked when this is called.
*/
static int
nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp,
struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p,
int called_from_renewthread, vnode_t *vpp)
{
struct nfsclowner *owp, *lowp, *nowp;
struct nfsclopen *op, *lop;
struct nfscllockowner *lp;
struct nfscllock *lckp;
struct nfsnode *np;
int error = 0, ret;
if (vp == NULL) {
KASSERT(vpp != NULL, ("nfscl_recalldeleg: vpp NULL"));
*vpp = NULL;
/*
* First, get a vnode for the file. This is needed to do RPCs.
*/
ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh,
dp->nfsdl_fhlen, p, &np);
if (ret) {
/*
* File isn't open, so nothing to move over to the
* server.
*/
return (0);
}
vp = NFSTOV(np);
*vpp = vp;
} else {
np = VTONFS(vp);
}
dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET;
/*
* Ok, if it's a write delegation, flush data to the server, so
* that close/open consistency is retained.
*/
ret = 0;
NFSLOCKNODE(np);
if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) {
np->n_flag |= NDELEGRECALL;
NFSUNLOCKNODE(np);
ret = ncl_flush(vp, MNT_WAIT, p, 1, called_from_renewthread);
NFSLOCKNODE(np);
np->n_flag &= ~NDELEGRECALL;
}
NFSINVALATTRCACHE(np);
NFSUNLOCKNODE(np);
if (ret == EIO && called_from_renewthread != 0) {
/*
* If the flush failed with EIO for the renew thread,
* return now, so that the dirty buffer will be flushed
* later.
*/
return (ret);
}
/*
* Now, for each openowner with opens issued locally, move them
* over to state against the server.
*/
LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) {
lop = LIST_FIRST(&lowp->nfsow_open);
if (lop != NULL) {
if (LIST_NEXT(lop, nfso_list) != NULL)
panic("nfsdlg mult opens");
/*
* Look for the same openowner against the server.
*/
LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
if (!NFSBCMP(lowp->nfsow_owner,
owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
newnfs_copycred(&dp->nfsdl_cred, cred);
ret = nfscl_moveopen(vp, clp, nmp, lop,
owp, dp, cred, p);
if (ret == NFSERR_STALECLIENTID ||
ret == NFSERR_STALEDONTRECOVER ||
ret == NFSERR_BADSESSION)
return (ret);
if (ret) {
nfscl_freeopen(lop, 1, true);
if (!error)
error = ret;
}
break;
}
}
/*
* If no openowner found, create one and get an open
* for it.
*/
if (owp == NULL) {
nowp = malloc(
sizeof (struct nfsclowner), M_NFSCLOWNER,
M_WAITOK);
nfscl_newopen(clp, NULL, &owp, &nowp, &op,
NULL, lowp->nfsow_owner, dp->nfsdl_fh,
dp->nfsdl_fhlen, NULL, NULL);
newnfs_copycred(&dp->nfsdl_cred, cred);
ret = nfscl_moveopen(vp, clp, nmp, lop,
owp, dp, cred, p);
if (ret) {
nfscl_freeopenowner(owp, 0);
if (ret == NFSERR_STALECLIENTID ||
ret == NFSERR_STALEDONTRECOVER ||
ret == NFSERR_BADSESSION)
return (ret);
if (ret) {
nfscl_freeopen(lop, 1, true);
if (!error)
error = ret;
}
}
}
}
}
/*
* Now, get byte range locks for any locks done locally.
*/
LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) {
newnfs_copycred(&dp->nfsdl_cred, cred);
ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p);
if (ret == NFSERR_STALESTATEID ||
ret == NFSERR_STALEDONTRECOVER ||
ret == NFSERR_STALECLIENTID ||
ret == NFSERR_BADSESSION)
return (ret);
if (ret && !error)
error = ret;
}
}
return (error);
}
/*
* Move a locally issued open over to an owner on the state list.
* SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and
* returns with it unlocked.
*/
static int
nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp,
struct ucred *cred, NFSPROC_T *p)
{
struct nfsclopen *op, *nop;
struct nfscldeleg *ndp;
struct nfsnode *np;
int error = 0, newone;
/*
* First, look for an appropriate open, If found, just increment the
* opencnt in it.
*/
LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode &&
op->nfso_fhlen == lop->nfso_fhlen &&
!NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) {
op->nfso_opencnt += lop->nfso_opencnt;
nfscl_freeopen(lop, 1, true);
return (0);
}
}
/* No appropriate open, so we have to do one against the server. */
np = VTONFS(vp);
nop = malloc(sizeof (struct nfsclopen) +
lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
nop->nfso_hash.le_prev = NULL;
newone = 0;
nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner,
lop->nfso_fh, lop->nfso_fhlen, cred, &newone);
ndp = dp;
error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen,
lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op,
NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p);
if (error) {
if (newone)
nfscl_freeopen(op, 0, true);
} else {
op->nfso_mode |= lop->nfso_mode;
op->nfso_opencnt += lop->nfso_opencnt;
nfscl_freeopen(lop, 1, true);
}
if (nop != NULL)
free(nop, M_NFSCLOPEN);
if (ndp != NULL) {
/*
* What should I do with the returned delegation, since the
* delegation is being recalled? For now, just printf and
* through it away.
*/
printf("Moveopen returned deleg\n");
free(ndp, M_NFSCLDELEG);
}
return (error);
}
/*
* Recall all delegations on this client.
*/
static void
nfscl_totalrecall(struct nfsclclient *clp)
{
struct nfscldeleg *dp;
TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0)
dp->nfsdl_flags |= NFSCLDL_RECALL;
}
}
/*
* Relock byte ranges. Called for delegation recall and state expiry.
*/
static int
nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred,
NFSPROC_T *p)
{
struct nfscllockowner *nlp;
struct nfsfh *nfhp;
struct nfsnode *np;
u_int64_t off, len;
int error, newone, donelocally;
if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp)) {
np = VTONFS(vp);
NFSLOCKNODE(np);
np->n_flag |= NMIGHTBELOCKED;
NFSUNLOCKNODE(np);
}
off = lop->nfslo_first;
len = lop->nfslo_end - lop->nfslo_first;
error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p,
clp, 1, NULL, lp->nfsl_lockflags, lp->nfsl_owner,
lp->nfsl_openowner, &nlp, &newone, &donelocally);
if (error || donelocally)
return (error);
nfhp = VTONFS(vp)->n_fhp;
error = nfscl_trylock(nmp, vp, nfhp->nfh_fh,
nfhp->nfh_len, nlp, newone, 0, off,
len, lop->nfslo_type, cred, p);
if (error)
nfscl_freelockowner(nlp, 0);
return (error);
}
/*
* Called to re-open a file. Basically get a vnode for the file handle
* and then call nfsrpc_openrpc() to do the rest.
*/
static int
nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen,
u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp,
struct ucred *cred, NFSPROC_T *p)
{
struct nfsnode *np;
vnode_t vp;
int error;
error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np);
if (error)
return (error);
vp = NFSTOV(np);
if (np->n_v4 != NULL) {
error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data,
np->n_v4->n4_fhlen, fhp, fhlen, mode, op,
NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0,
cred, p);
} else {
error = EINVAL;
}
vrele(vp);
return (error);
}
/*
* Try an open against the server. Just call nfsrpc_openrpc(), retrying while
* NFSERR_DELAY. Also, try system credentials, if the passed in credentials
* fail.
*/
static int
nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
u_int8_t *name, int namelen, struct nfscldeleg **ndpp,
int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p)
{
int error;
do {
error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen,
mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p,
0, 0);
if (error == NFSERR_DELAY)
(void) nfs_catnap(PZERO, error, "nfstryop");
} while (error == NFSERR_DELAY);
if (error == EAUTH || error == EACCES) {
/* Try again using system credentials */
newnfs_setroot(cred);
do {
error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp,
newfhlen, mode, op, name, namelen, ndpp, reclaim,
delegtype, cred, p, 1, 0);
if (error == NFSERR_DELAY)
(void) nfs_catnap(PZERO, error, "nfstryop");
} while (error == NFSERR_DELAY);
}
return (error);
}
/*
* Try a byte range lock. Just loop on nfsrpc_lock() while it returns
* NFSERR_DELAY. Also, retry with system credentials, if the provided
* cred don't work.
*/
static int
nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp,
int fhlen, struct nfscllockowner *nlp, int newone, int reclaim,
u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p)
{
struct nfsrv_descript nfsd, *nd = &nfsd;
int error;
do {
error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone,
reclaim, off, len, type, cred, p, 0);
if (!error && nd->nd_repstat == NFSERR_DELAY)
(void) nfs_catnap(PZERO, (int)nd->nd_repstat,
"nfstrylck");
} while (!error && nd->nd_repstat == NFSERR_DELAY);
if (!error)
error = nd->nd_repstat;
if (error == EAUTH || error == EACCES) {
/* Try again using root credentials */
newnfs_setroot(cred);
do {
error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp,
newone, reclaim, off, len, type, cred, p, 1);
if (!error && nd->nd_repstat == NFSERR_DELAY)
(void) nfs_catnap(PZERO, (int)nd->nd_repstat,
"nfstrylck");
} while (!error && nd->nd_repstat == NFSERR_DELAY);
if (!error)
error = nd->nd_repstat;
}
return (error);
}
/*
* Try a delegreturn against the server. Just call nfsrpc_delegreturn(),
* retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
* credentials fail.
*/
int
nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred,
struct nfsmount *nmp, NFSPROC_T *p)
{
int error;
do {
error = nfsrpc_delegreturn(dp, cred, nmp, p, 0);
if (error == NFSERR_DELAY)
(void) nfs_catnap(PZERO, error, "nfstrydp");
} while (error == NFSERR_DELAY);
if (error == EAUTH || error == EACCES) {
/* Try again using system credentials */
newnfs_setroot(cred);
do {
error = nfsrpc_delegreturn(dp, cred, nmp, p, 1);
if (error == NFSERR_DELAY)
(void) nfs_catnap(PZERO, error, "nfstrydp");
} while (error == NFSERR_DELAY);
}
return (error);
}
/*
* Try a close against the server. Just call nfsrpc_closerpc(),
* retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
* credentials fail.
*/
int
nfscl_tryclose(struct nfsclopen *op, struct ucred *cred,
struct nfsmount *nmp, NFSPROC_T *p, bool loop_on_delayed)
{
struct nfsrv_descript nfsd, *nd = &nfsd;
int error;
do {
error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0);
if (loop_on_delayed && error == NFSERR_DELAY)
(void) nfs_catnap(PZERO, error, "nfstrycl");
} while (loop_on_delayed && error == NFSERR_DELAY);
if (error == EAUTH || error == EACCES) {
/* Try again using system credentials */
newnfs_setroot(cred);
do {
error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1);
if (loop_on_delayed && error == NFSERR_DELAY)
(void) nfs_catnap(PZERO, error, "nfstrycl");
} while (loop_on_delayed && error == NFSERR_DELAY);
}
return (error);
}
/*
* Decide if a delegation on a file permits close without flushing writes
* to the server. This might be a big performance win in some environments.
* (Not useful until the client does caching on local stable storage.)
*/
int
nfscl_mustflush(vnode_t vp)
{
struct nfsclclient *clp;
struct nfscldeleg *dp;
struct nfsnode *np;
struct nfsmount *nmp;
np = VTONFS(vp);
nmp = VFSTONFS(vp->v_mount);
if (!NFSHASNFSV4(nmp))
return (1);
NFSLOCKCLSTATE();
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return (1);
}
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
if (dp != NULL && (dp->nfsdl_flags &
(NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) ==
NFSCLDL_WRITE &&
(dp->nfsdl_sizelimit >= np->n_size ||
!NFSHASSTRICT3530(nmp))) {
NFSUNLOCKCLSTATE();
return (0);
}
NFSUNLOCKCLSTATE();
return (1);
}
/*
* See if a (write) delegation exists for this file.
*/
int
nfscl_nodeleg(vnode_t vp, int writedeleg)
{
struct nfsclclient *clp;
struct nfscldeleg *dp;
struct nfsnode *np;
struct nfsmount *nmp;
np = VTONFS(vp);
nmp = VFSTONFS(vp->v_mount);
if (!NFSHASNFSV4(nmp))
return (1);
NFSLOCKMNT(nmp);
if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
NFSUNLOCKMNT(nmp);
return (1);
}
NFSUNLOCKMNT(nmp);
NFSLOCKCLSTATE();
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return (1);
}
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
if (dp != NULL &&
(dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 &&
(writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) ==
NFSCLDL_WRITE)) {
NFSUNLOCKCLSTATE();
return (0);
}
NFSUNLOCKCLSTATE();
return (1);
}
/*
* Look for an associated delegation that should be DelegReturned.
*/
int
nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp)
{
struct nfsclclient *clp;
struct nfscldeleg *dp;
struct nfsclowner *owp;
struct nfscllockowner *lp;
struct nfsmount *nmp;
struct ucred *cred;
struct nfsnode *np;
int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
nmp = VFSTONFS(vp->v_mount);
if (NFSHASPNFS(nmp))
return (retcnt);
NFSLOCKMNT(nmp);
if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
NFSUNLOCKMNT(nmp);
return (retcnt);
}
NFSUNLOCKMNT(nmp);
np = VTONFS(vp);
NFSLOCKCLSTATE();
/*
* Loop around waiting for:
* - outstanding I/O operations on delegations to complete
* - for a delegation on vp that has state, lock the client and
* do a recall
* - return delegation with no state
*/
while (1) {
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return (retcnt);
}
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len);
if (dp != NULL) {
/*
* Wait for outstanding I/O ops to be done.
*/
if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
if (igotlock) {
nfsv4_unlock(&clp->nfsc_lock, 0);
igotlock = 0;
}
dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
(void) nfsmsleep(&dp->nfsdl_rwlock,
NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
continue;
}
needsrecall = 0;
LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
if (!LIST_EMPTY(&owp->nfsow_open)) {
needsrecall = 1;
break;
}
}
if (!needsrecall) {
LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
if (!LIST_EMPTY(&lp->nfsl_lock)) {
needsrecall = 1;
break;
}
}
}
if (needsrecall && !triedrecall) {
dp->nfsdl_flags |= NFSCLDL_DELEGRET;
islept = 0;
while (!igotlock) {
igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
&islept, NFSCLSTATEMUTEXPTR, NULL);
if (islept)
break;
}
if (islept)
continue;
NFSUNLOCKCLSTATE();
cred = newnfs_getcred();
newnfs_copycred(&dp->nfsdl_cred, cred);
nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0, NULL);
NFSFREECRED(cred);
triedrecall = 1;
NFSLOCKCLSTATE();
nfsv4_unlock(&clp->nfsc_lock, 0);
igotlock = 0;
continue;
}
*stp = dp->nfsdl_stateid;
retcnt = 1;
nfscl_cleandeleg(dp);
nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
}
if (igotlock)
nfsv4_unlock(&clp->nfsc_lock, 0);
NFSUNLOCKCLSTATE();
return (retcnt);
}
}
/*
* Look for associated delegation(s) that should be DelegReturned.
*/
int
nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp,
nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p)
{
struct nfsclclient *clp;
struct nfscldeleg *dp;
struct nfsclowner *owp;
struct nfscllockowner *lp;
struct nfsmount *nmp;
struct ucred *cred;
struct nfsnode *np;
int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
nmp = VFSTONFS(fvp->v_mount);
*gotfdp = 0;
*gottdp = 0;
if (NFSHASPNFS(nmp))
return (retcnt);
NFSLOCKCLSTATE();
/*
* Loop around waiting for:
* - outstanding I/O operations on delegations to complete
* - for a delegation on fvp that has state, lock the client and
* do a recall
* - return delegation(s) with no state.
*/
while (1) {
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return (retcnt);
}
np = VTONFS(fvp);
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len);
if (dp != NULL && *gotfdp == 0) {
/*
* Wait for outstanding I/O ops to be done.
*/
if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
if (igotlock) {
nfsv4_unlock(&clp->nfsc_lock, 0);
igotlock = 0;
}
dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
(void) nfsmsleep(&dp->nfsdl_rwlock,
NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
continue;
}
needsrecall = 0;
LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
if (!LIST_EMPTY(&owp->nfsow_open)) {
needsrecall = 1;
break;
}
}
if (!needsrecall) {
LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
if (!LIST_EMPTY(&lp->nfsl_lock)) {
needsrecall = 1;
break;
}
}
}
if (needsrecall && !triedrecall) {
dp->nfsdl_flags |= NFSCLDL_DELEGRET;
islept = 0;
while (!igotlock) {
igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
&islept, NFSCLSTATEMUTEXPTR, NULL);
if (islept)
break;
}
if (islept)
continue;
NFSUNLOCKCLSTATE();
cred = newnfs_getcred();
newnfs_copycred(&dp->nfsdl_cred, cred);
nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0, NULL);
NFSFREECRED(cred);
triedrecall = 1;
NFSLOCKCLSTATE();
nfsv4_unlock(&clp->nfsc_lock, 0);
igotlock = 0;
continue;
}
*fstp = dp->nfsdl_stateid;
retcnt++;
*gotfdp = 1;
nfscl_cleandeleg(dp);
nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
}
if (igotlock) {
nfsv4_unlock(&clp->nfsc_lock, 0);
igotlock = 0;
}
if (tvp != NULL) {
np = VTONFS(tvp);
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
np->n_fhp->nfh_len);
if (dp != NULL && *gottdp == 0) {
/*
* Wait for outstanding I/O ops to be done.
*/
if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
(void) nfsmsleep(&dp->nfsdl_rwlock,
NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
continue;
}
LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
if (!LIST_EMPTY(&owp->nfsow_open)) {
NFSUNLOCKCLSTATE();
return (retcnt);
}
}
LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
if (!LIST_EMPTY(&lp->nfsl_lock)) {
NFSUNLOCKCLSTATE();
return (retcnt);
}
}
*tstp = dp->nfsdl_stateid;
retcnt++;
*gottdp = 1;
nfscl_cleandeleg(dp);
nfscl_freedeleg(&clp->nfsc_deleg, dp, true);
}
}
NFSUNLOCKCLSTATE();
return (retcnt);
}
}
/*
* Get a reference on the clientid associated with the mount point.
* Return 1 if success, 0 otherwise.
*/
int
nfscl_getref(struct nfsmount *nmp)
{
struct nfsclclient *clp;
NFSLOCKCLSTATE();
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return (0);
}
nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL);
NFSUNLOCKCLSTATE();
return (1);
}
/*
* Release a reference on a clientid acquired with the above call.
*/
void
nfscl_relref(struct nfsmount *nmp)
{
struct nfsclclient *clp;
NFSLOCKCLSTATE();
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return;
}
nfsv4_relref(&clp->nfsc_lock);
NFSUNLOCKCLSTATE();
}
/*
* Save the size attribute in the delegation, since the nfsnode
* is going away.
*/
void
nfscl_reclaimnode(vnode_t vp)
{
struct nfsclclient *clp;
struct nfscldeleg *dp;
struct nfsnode *np = VTONFS(vp);
struct nfsmount *nmp;
nmp = VFSTONFS(vp->v_mount);
if (!NFSHASNFSV4(nmp))
return;
NFSLOCKCLSTATE();
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return;
}
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
dp->nfsdl_size = np->n_size;
NFSUNLOCKCLSTATE();
}
/*
* Get the saved size attribute in the delegation, since it is a
* newly allocated nfsnode.
*/
void
nfscl_newnode(vnode_t vp)
{
struct nfsclclient *clp;
struct nfscldeleg *dp;
struct nfsnode *np = VTONFS(vp);
struct nfsmount *nmp;
nmp = VFSTONFS(vp->v_mount);
if (!NFSHASNFSV4(nmp))
return;
NFSLOCKCLSTATE();
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return;
}
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
np->n_size = dp->nfsdl_size;
NFSUNLOCKCLSTATE();
}
/*
* If there is a valid write delegation for this file, set the modtime
* to the local clock time.
*/
void
nfscl_delegmodtime(vnode_t vp)
{
struct nfsclclient *clp;
struct nfscldeleg *dp;
struct nfsnode *np = VTONFS(vp);
struct nfsmount *nmp;
nmp = VFSTONFS(vp->v_mount);
if (!NFSHASNFSV4(nmp))
return;
NFSLOCKMNT(nmp);
if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
NFSUNLOCKMNT(nmp);
return;
}
NFSUNLOCKMNT(nmp);
NFSLOCKCLSTATE();
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return;
}
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) {
nanotime(&dp->nfsdl_modtime);
dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
}
NFSUNLOCKCLSTATE();
}
/*
* If there is a valid write delegation for this file with a modtime set,
* put that modtime in mtime.
*/
void
nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime)
{
struct nfsclclient *clp;
struct nfscldeleg *dp;
struct nfsnode *np = VTONFS(vp);
struct nfsmount *nmp;
nmp = VFSTONFS(vp->v_mount);
if (!NFSHASNFSV4(nmp))
return;
NFSLOCKMNT(nmp);
if ((nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0) {
NFSUNLOCKMNT(nmp);
return;
}
NFSUNLOCKMNT(nmp);
NFSLOCKCLSTATE();
clp = nfscl_findcl(nmp);
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return;
}
dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
if (dp != NULL &&
(dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) ==
(NFSCLDL_WRITE | NFSCLDL_MODTIMESET))
*mtime = dp->nfsdl_modtime;
NFSUNLOCKCLSTATE();
}
static int
nfscl_errmap(struct nfsrv_descript *nd, u_int32_t minorvers)
{
short *defaulterrp, *errp;
if (!nd->nd_repstat)
return (0);
if (nd->nd_procnum == NFSPROC_NOOP)
return (txdr_unsigned(nd->nd_repstat & 0xffff));
if (nd->nd_repstat == EBADRPC)
return (txdr_unsigned(NFSERR_BADXDR));
if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
nd->nd_repstat == NFSERR_OPILLEGAL)
return (txdr_unsigned(nd->nd_repstat));
if (nd->nd_repstat >= NFSERR_BADIOMODE && nd->nd_repstat < 20000 &&
minorvers > NFSV4_MINORVERSION) {
/* NFSv4.n error. */
return (txdr_unsigned(nd->nd_repstat));
}
if (nd->nd_procnum < NFSV4OP_CBNOPS)
errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum];
else
return (txdr_unsigned(nd->nd_repstat));
while (*++errp)
if (*errp == (short)nd->nd_repstat)
return (txdr_unsigned(nd->nd_repstat));
return (txdr_unsigned(*defaulterrp));
}
/*
* Called to find/add a layout to a client.
* This function returns the layout with a refcnt (shared lock) upon
* success (returns 0) or with no lock/refcnt on the layout when an
* error is returned.
* If a layout is passed in via lypp, it is locked (exclusively locked).
*/
int
nfscl_layout(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
nfsv4stateid_t *stateidp, int layouttype, int retonclose,
struct nfsclflayouthead *fhlp, struct nfscllayout **lypp,
struct ucred *cred, NFSPROC_T *p)
{
struct nfsclclient *clp;
struct nfscllayout *lyp, *tlyp;
struct nfsclflayout *flp;
struct nfsnode *np = VTONFS(vp);
mount_t mp;
int layout_passed_in;
mp = nmp->nm_mountp;
layout_passed_in = 1;
tlyp = NULL;
lyp = *lypp;
if (lyp == NULL) {
layout_passed_in = 0;
tlyp = malloc(sizeof(*tlyp) + fhlen - 1, M_NFSLAYOUT,
M_WAITOK | M_ZERO);
}
NFSLOCKCLSTATE();
clp = nmp->nm_clp;
if (clp == NULL) {
if (layout_passed_in != 0)
nfsv4_unlock(&lyp->nfsly_lock, 0);
NFSUNLOCKCLSTATE();
if (tlyp != NULL)
free(tlyp, M_NFSLAYOUT);
return (EPERM);
}
if (lyp == NULL) {
/*
* Although no lyp was passed in, another thread might have
* allocated one. If one is found, just increment it's ref
* count and return it.
*/
lyp = nfscl_findlayout(clp, fhp, fhlen);
if (lyp == NULL) {
lyp = tlyp;
tlyp = NULL;
lyp->nfsly_stateid.seqid = stateidp->seqid;
lyp->nfsly_stateid.other[0] = stateidp->other[0];
lyp->nfsly_stateid.other[1] = stateidp->other[1];
lyp->nfsly_stateid.other[2] = stateidp->other[2];
lyp->nfsly_lastbyte = 0;
LIST_INIT(&lyp->nfsly_flayread);
LIST_INIT(&lyp->nfsly_flayrw);
LIST_INIT(&lyp->nfsly_recall);
lyp->nfsly_filesid[0] = np->n_vattr.na_filesid[0];
lyp->nfsly_filesid[1] = np->n_vattr.na_filesid[1];
lyp->nfsly_clp = clp;
if (layouttype == NFSLAYOUT_FLEXFILE)
lyp->nfsly_flags = NFSLY_FLEXFILE;
else
lyp->nfsly_flags = NFSLY_FILES;
if (retonclose != 0)
lyp->nfsly_flags |= NFSLY_RETONCLOSE;
lyp->nfsly_fhlen = fhlen;
NFSBCOPY(fhp, lyp->nfsly_fh, fhlen);
TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
LIST_INSERT_HEAD(NFSCLLAYOUTHASH(clp, fhp, fhlen), lyp,
nfsly_hash);
lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
nfscl_layoutcnt++;
} else {
if (retonclose != 0)
lyp->nfsly_flags |= NFSLY_RETONCLOSE;
if (stateidp->seqid > lyp->nfsly_stateid.seqid)
lyp->nfsly_stateid.seqid = stateidp->seqid;
TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
}
nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
if (NFSCL_FORCEDISM(mp)) {
NFSUNLOCKCLSTATE();
if (tlyp != NULL)
free(tlyp, M_NFSLAYOUT);
return (EPERM);
}
*lypp = lyp;
} else if (stateidp->seqid > lyp->nfsly_stateid.seqid)
lyp->nfsly_stateid.seqid = stateidp->seqid;
/* Merge the new list of File Layouts into the list. */
flp = LIST_FIRST(fhlp);
if (flp != NULL) {
if (flp->nfsfl_iomode == NFSLAYOUTIOMODE_READ)
nfscl_mergeflayouts(&lyp->nfsly_flayread, fhlp);
else
nfscl_mergeflayouts(&lyp->nfsly_flayrw, fhlp);
}
if (layout_passed_in != 0)
nfsv4_unlock(&lyp->nfsly_lock, 1);
NFSUNLOCKCLSTATE();
if (tlyp != NULL)
free(tlyp, M_NFSLAYOUT);
return (0);
}
/*
* Search for a layout by MDS file handle.
* If one is found, it is returned with a refcnt (shared lock) iff
* retflpp returned non-NULL and locked (exclusive locked) iff retflpp is
* returned NULL.
*/
struct nfscllayout *
nfscl_getlayout(struct nfsclclient *clp, uint8_t *fhp, int fhlen,
uint64_t off, uint32_t rwaccess, struct nfsclflayout **retflpp,
int *recalledp)
{
struct nfscllayout *lyp;
mount_t mp;
int error, igotlock;
mp = clp->nfsc_nmp->nm_mountp;
*recalledp = 0;
*retflpp = NULL;
NFSLOCKCLSTATE();
lyp = nfscl_findlayout(clp, fhp, fhlen);
if (lyp != NULL) {
if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
TAILQ_REMOVE(&clp->nfsc_layout, lyp, nfsly_list);
TAILQ_INSERT_HEAD(&clp->nfsc_layout, lyp, nfsly_list);
lyp->nfsly_timestamp = NFSD_MONOSEC + 120;
error = nfscl_findlayoutforio(lyp, off, rwaccess,
retflpp);
if (error == 0)
nfsv4_getref(&lyp->nfsly_lock, NULL,
NFSCLSTATEMUTEXPTR, mp);
else {
do {
igotlock = nfsv4_lock(&lyp->nfsly_lock,
1, NULL, NFSCLSTATEMUTEXPTR, mp);
} while (igotlock == 0 && !NFSCL_FORCEDISM(mp));
*retflpp = NULL;
}
if (NFSCL_FORCEDISM(mp)) {
lyp = NULL;
*recalledp = 1;
}
} else {
lyp = NULL;
*recalledp = 1;
}
}
NFSUNLOCKCLSTATE();
return (lyp);
}
/*
* Search for a layout by MDS file handle. If one is found, mark in to be
* recalled, if it already marked "return on close".
*/
static void
nfscl_retoncloselayout(vnode_t vp, struct nfsclclient *clp, uint8_t *fhp,
int fhlen, struct nfsclrecalllayout **recallpp)
{
struct nfscllayout *lyp;
uint32_t iomode;
if (vp->v_type != VREG || !NFSHASPNFS(VFSTONFS(vp->v_mount)) ||
nfscl_enablecallb == 0 || nfs_numnfscbd == 0 ||
(VTONFS(vp)->n_flag & NNOLAYOUT) != 0)
return;
lyp = nfscl_findlayout(clp, fhp, fhlen);
if (lyp != NULL && (lyp->nfsly_flags & (NFSLY_RETONCLOSE |
NFSLY_RECALL)) == NFSLY_RETONCLOSE) {
iomode = 0;
if (!LIST_EMPTY(&lyp->nfsly_flayread))
iomode |= NFSLAYOUTIOMODE_READ;
if (!LIST_EMPTY(&lyp->nfsly_flayrw))
iomode |= NFSLAYOUTIOMODE_RW;
(void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode,
0, UINT64_MAX, lyp->nfsly_stateid.seqid, 0, 0, NULL,
*recallpp);
NFSCL_DEBUG(4, "retoncls recall iomode=%d\n", iomode);
*recallpp = NULL;
}
}
/*
* Mark the layout to be recalled and with an error.
* Also, disable the dsp from further use.
*/
void
nfscl_dserr(uint32_t op, uint32_t stat, struct nfscldevinfo *dp,
struct nfscllayout *lyp, struct nfsclds *dsp)
{
struct nfsclrecalllayout *recallp;
uint32_t iomode;
printf("DS being disabled, error=%d\n", stat);
/* Set up the return of the layout. */
recallp = malloc(sizeof(*recallp), M_NFSLAYRECALL, M_WAITOK);
iomode = 0;
NFSLOCKCLSTATE();
if ((lyp->nfsly_flags & NFSLY_RECALL) == 0) {
if (!LIST_EMPTY(&lyp->nfsly_flayread))
iomode |= NFSLAYOUTIOMODE_READ;
if (!LIST_EMPTY(&lyp->nfsly_flayrw))
iomode |= NFSLAYOUTIOMODE_RW;
(void)nfscl_layoutrecall(NFSLAYOUTRETURN_FILE, lyp, iomode,
0, UINT64_MAX, lyp->nfsly_stateid.seqid, stat, op,
dp->nfsdi_deviceid, recallp);
NFSUNLOCKCLSTATE();
NFSCL_DEBUG(4, "nfscl_dserr recall iomode=%d\n", iomode);
} else {
NFSUNLOCKCLSTATE();
free(recallp, M_NFSLAYRECALL);
}
/* And shut the TCP connection down. */
nfscl_cancelreqs(dsp);
}
/*
* Cancel all RPCs for this "dsp" by closing the connection.
* Also, mark the session as defunct.
* If NFSCLDS_SAMECONN is set, the connection is shared with other DSs and
* cannot be shut down.
*/
void
nfscl_cancelreqs(struct nfsclds *dsp)
{
struct __rpc_client *cl;
static int non_event;
NFSLOCKDS(dsp);
if ((dsp->nfsclds_flags & (NFSCLDS_CLOSED | NFSCLDS_SAMECONN)) == 0 &&
dsp->nfsclds_sockp != NULL &&
dsp->nfsclds_sockp->nr_client != NULL) {
dsp->nfsclds_flags |= NFSCLDS_CLOSED;
cl = dsp->nfsclds_sockp->nr_client;
dsp->nfsclds_sess.nfsess_defunct = 1;
NFSUNLOCKDS(dsp);
CLNT_CLOSE(cl);
/*
* This 1sec sleep is done to reduce the number of reconnect
* attempts made on the DS while it has failed.
*/
tsleep(&non_event, PVFS, "ndscls", hz);
return;
}
NFSUNLOCKDS(dsp);
}
/*
* Dereference a layout.
*/
void
nfscl_rellayout(struct nfscllayout *lyp, int exclocked)
{
NFSLOCKCLSTATE();
if (exclocked != 0)
nfsv4_unlock(&lyp->nfsly_lock, 0);
else
nfsv4_relref(&lyp->nfsly_lock);
NFSUNLOCKCLSTATE();
}
/*
* Search for a devinfo by deviceid. If one is found, return it after
* acquiring a reference count on it.
*/
struct nfscldevinfo *
nfscl_getdevinfo(struct nfsclclient *clp, uint8_t *deviceid,
struct nfscldevinfo *dip)
{
NFSLOCKCLSTATE();
if (dip == NULL)
dip = nfscl_finddevinfo(clp, deviceid);
if (dip != NULL)
dip->nfsdi_refcnt++;
NFSUNLOCKCLSTATE();
return (dip);
}
/*
* Dereference a devinfo structure.
*/
static void
nfscl_reldevinfo_locked(struct nfscldevinfo *dip)
{
dip->nfsdi_refcnt--;
if (dip->nfsdi_refcnt == 0)
wakeup(&dip->nfsdi_refcnt);
}
/*
* Dereference a devinfo structure.
*/
void
nfscl_reldevinfo(struct nfscldevinfo *dip)
{
NFSLOCKCLSTATE();
nfscl_reldevinfo_locked(dip);
NFSUNLOCKCLSTATE();
}
/*
* Find a layout for this file handle. Return NULL upon failure.
*/
static struct nfscllayout *
nfscl_findlayout(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
{
struct nfscllayout *lyp;
LIST_FOREACH(lyp, NFSCLLAYOUTHASH(clp, fhp, fhlen), nfsly_hash)
if (lyp->nfsly_fhlen == fhlen &&
!NFSBCMP(lyp->nfsly_fh, fhp, fhlen))
break;
return (lyp);
}
/*
* Find a devinfo for this deviceid. Return NULL upon failure.
*/
static struct nfscldevinfo *
nfscl_finddevinfo(struct nfsclclient *clp, uint8_t *deviceid)
{
struct nfscldevinfo *dip;
LIST_FOREACH(dip, &clp->nfsc_devinfo, nfsdi_list)
if (NFSBCMP(dip->nfsdi_deviceid, deviceid, NFSX_V4DEVICEID)
== 0)
break;
return (dip);
}
/*
* Merge the new file layout list into the main one, maintaining it in
* increasing offset order.
*/
static void
nfscl_mergeflayouts(struct nfsclflayouthead *fhlp,
struct nfsclflayouthead *newfhlp)
{
struct nfsclflayout *flp, *nflp, *prevflp, *tflp;
flp = LIST_FIRST(fhlp);
prevflp = NULL;
LIST_FOREACH_SAFE(nflp, newfhlp, nfsfl_list, tflp) {
while (flp != NULL && flp->nfsfl_off < nflp->nfsfl_off) {
prevflp = flp;
flp = LIST_NEXT(flp, nfsfl_list);
}
if (prevflp == NULL)
LIST_INSERT_HEAD(fhlp, nflp, nfsfl_list);
else
LIST_INSERT_AFTER(prevflp, nflp, nfsfl_list);
prevflp = nflp;
}
}
/*
* Add this nfscldevinfo to the client, if it doesn't already exist.
* This function consumes the structure pointed at by dip, if not NULL.
*/
int
nfscl_adddevinfo(struct nfsmount *nmp, struct nfscldevinfo *dip, int ind,
struct nfsclflayout *flp)
{
struct nfsclclient *clp;
struct nfscldevinfo *tdip;
uint8_t *dev;
NFSLOCKCLSTATE();
clp = nmp->nm_clp;
if (clp == NULL) {
NFSUNLOCKCLSTATE();
if (dip != NULL)
free(dip, M_NFSDEVINFO);
return (ENODEV);
}
if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
dev = flp->nfsfl_dev;
else
dev = flp->nfsfl_ffm[ind].dev;
tdip = nfscl_finddevinfo(clp, dev);
if (tdip != NULL) {
tdip->nfsdi_layoutrefs++;
if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
flp->nfsfl_devp = tdip;
else
flp->nfsfl_ffm[ind].devp = tdip;
nfscl_reldevinfo_locked(tdip);
NFSUNLOCKCLSTATE();
if (dip != NULL)
free(dip, M_NFSDEVINFO);
return (0);
}
if (dip != NULL) {
LIST_INSERT_HEAD(&clp->nfsc_devinfo, dip, nfsdi_list);
dip->nfsdi_layoutrefs = 1;
if ((flp->nfsfl_flags & NFSFL_FILE) != 0)
flp->nfsfl_devp = dip;
else
flp->nfsfl_ffm[ind].devp = dip;
}
NFSUNLOCKCLSTATE();
if (dip == NULL)
return (ENODEV);
return (0);
}
/*
* Free up a layout structure and associated file layout structure(s).
*/
void
nfscl_freelayout(struct nfscllayout *layp)
{
struct nfsclflayout *flp, *nflp;
struct nfsclrecalllayout *rp, *nrp;
LIST_FOREACH_SAFE(flp, &layp->nfsly_flayread, nfsfl_list, nflp) {
LIST_REMOVE(flp, nfsfl_list);
nfscl_freeflayout(flp);
}
LIST_FOREACH_SAFE(flp, &layp->nfsly_flayrw, nfsfl_list, nflp) {
LIST_REMOVE(flp, nfsfl_list);
nfscl_freeflayout(flp);
}
LIST_FOREACH_SAFE(rp, &layp->nfsly_recall, nfsrecly_list, nrp) {
LIST_REMOVE(rp, nfsrecly_list);
free(rp, M_NFSLAYRECALL);
}
nfscl_layoutcnt--;
free(layp, M_NFSLAYOUT);
}
/*
* Free up a file layout structure.
*/
void
nfscl_freeflayout(struct nfsclflayout *flp)
{
int i, j;
if ((flp->nfsfl_flags & NFSFL_FILE) != 0) {
for (i = 0; i < flp->nfsfl_fhcnt; i++)
free(flp->nfsfl_fh[i], M_NFSFH);
if (flp->nfsfl_devp != NULL)
flp->nfsfl_devp->nfsdi_layoutrefs--;
}
if ((flp->nfsfl_flags & NFSFL_FLEXFILE) != 0)
for (i = 0; i < flp->nfsfl_mirrorcnt; i++) {
for (j = 0; j < flp->nfsfl_ffm[i].fhcnt; j++)
free(flp->nfsfl_ffm[i].fh[j], M_NFSFH);
if (flp->nfsfl_ffm[i].devp != NULL)
flp->nfsfl_ffm[i].devp->nfsdi_layoutrefs--;
}
free(flp, M_NFSFLAYOUT);
}
/*
* Free up a file layout devinfo structure.
*/
void
nfscl_freedevinfo(struct nfscldevinfo *dip)
{
free(dip, M_NFSDEVINFO);
}
/*
* Mark any layouts that match as recalled.
*/
static int
nfscl_layoutrecall(int recalltype, struct nfscllayout *lyp, uint32_t iomode,
uint64_t off, uint64_t len, uint32_t stateseqid, uint32_t stat, uint32_t op,
char *devid, struct nfsclrecalllayout *recallp)
{
struct nfsclrecalllayout *rp, *orp;
recallp->nfsrecly_recalltype = recalltype;
recallp->nfsrecly_iomode = iomode;
recallp->nfsrecly_stateseqid = stateseqid;
recallp->nfsrecly_off = off;
recallp->nfsrecly_len = len;
recallp->nfsrecly_stat = stat;
recallp->nfsrecly_op = op;
if (devid != NULL)
NFSBCOPY(devid, recallp->nfsrecly_devid, NFSX_V4DEVICEID);
/*
* Order the list as file returns first, followed by fsid and any
* returns, both in increasing stateseqid order.
* Note that the seqids wrap around, so 1 is after 0xffffffff.
* (I'm not sure this is correct because I find RFC5661 confusing
* on this, but hopefully it will work ok.)
*/
orp = NULL;
LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
orp = rp;
if ((recalltype == NFSLAYOUTRETURN_FILE &&
(rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE ||
nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) ||
(recalltype != NFSLAYOUTRETURN_FILE &&
rp->nfsrecly_recalltype != NFSLAYOUTRETURN_FILE &&
nfscl_seq(stateseqid, rp->nfsrecly_stateseqid) != 0)) {
LIST_INSERT_BEFORE(rp, recallp, nfsrecly_list);
break;
}
/*
* Put any error return on all the file returns that will
* preceed this one.
*/
if (rp->nfsrecly_recalltype == NFSLAYOUTRETURN_FILE &&
stat != 0 && rp->nfsrecly_stat == 0) {
rp->nfsrecly_stat = stat;
rp->nfsrecly_op = op;
if (devid != NULL)
NFSBCOPY(devid, rp->nfsrecly_devid,
NFSX_V4DEVICEID);
}
}
if (rp == NULL) {
if (orp == NULL)
LIST_INSERT_HEAD(&lyp->nfsly_recall, recallp,
nfsrecly_list);
else
LIST_INSERT_AFTER(orp, recallp, nfsrecly_list);
}
lyp->nfsly_flags |= NFSLY_RECALL;
wakeup(lyp->nfsly_clp);
return (0);
}
/*
* Compare the two seqids for ordering. The trick is that the seqids can
* wrap around from 0xffffffff->0, so check for the cases where one
* has wrapped around.
* Return 1 if seqid1 comes before seqid2, 0 otherwise.
*/
static int
nfscl_seq(uint32_t seqid1, uint32_t seqid2)
{
if (seqid2 > seqid1 && (seqid2 - seqid1) >= 0x7fffffff)
/* seqid2 has wrapped around. */
return (0);
if (seqid1 > seqid2 && (seqid1 - seqid2) >= 0x7fffffff)
/* seqid1 has wrapped around. */
return (1);
if (seqid1 <= seqid2)
return (1);
return (0);
}
/*
* Do a layout return for each of the recalls.
*/
static void
nfscl_layoutreturn(struct nfsmount *nmp, struct nfscllayout *lyp,
struct ucred *cred, NFSPROC_T *p)
{
struct nfsclrecalllayout *rp;
nfsv4stateid_t stateid;
int layouttype;
NFSBCOPY(lyp->nfsly_stateid.other, stateid.other, NFSX_STATEIDOTHER);
stateid.seqid = lyp->nfsly_stateid.seqid;
if ((lyp->nfsly_flags & NFSLY_FILES) != 0)
layouttype = NFSLAYOUT_NFSV4_1_FILES;
else
layouttype = NFSLAYOUT_FLEXFILE;
LIST_FOREACH(rp, &lyp->nfsly_recall, nfsrecly_list) {
(void)nfsrpc_layoutreturn(nmp, lyp->nfsly_fh,
lyp->nfsly_fhlen, 0, layouttype,
rp->nfsrecly_iomode, rp->nfsrecly_recalltype,
rp->nfsrecly_off, rp->nfsrecly_len,
&stateid, cred, p, rp->nfsrecly_stat, rp->nfsrecly_op,
rp->nfsrecly_devid);
}
}
/*
* Do the layout commit for a file layout.
*/
static void
nfscl_dolayoutcommit(struct nfsmount *nmp, struct nfscllayout *lyp,
struct ucred *cred, NFSPROC_T *p)
{
struct nfsclflayout *flp;
uint64_t len;
int error, layouttype;
if ((lyp->nfsly_flags & NFSLY_FILES) != 0)
layouttype = NFSLAYOUT_NFSV4_1_FILES;
else
layouttype = NFSLAYOUT_FLEXFILE;
LIST_FOREACH(flp, &lyp->nfsly_flayrw, nfsfl_list) {
if (layouttype == NFSLAYOUT_FLEXFILE &&
(flp->nfsfl_fflags & NFSFLEXFLAG_NO_LAYOUTCOMMIT) != 0) {
NFSCL_DEBUG(4, "Flex file: no layoutcommit\n");
/* If not supported, don't bother doing it. */
NFSLOCKMNT(nmp);
nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
NFSUNLOCKMNT(nmp);
break;
} else if (flp->nfsfl_off <= lyp->nfsly_lastbyte) {
len = flp->nfsfl_end - flp->nfsfl_off;
error = nfsrpc_layoutcommit(nmp, lyp->nfsly_fh,
lyp->nfsly_fhlen, 0, flp->nfsfl_off, len,
lyp->nfsly_lastbyte, &lyp->nfsly_stateid,
layouttype, cred, p, NULL);
NFSCL_DEBUG(4, "layoutcommit err=%d\n", error);
if (error == NFSERR_NOTSUPP) {
/* If not supported, don't bother doing it. */
NFSLOCKMNT(nmp);
nmp->nm_state |= NFSSTA_NOLAYOUTCOMMIT;
NFSUNLOCKMNT(nmp);
break;
}
}
}
}
/*
* Commit all layouts for a file (vnode).
*/
int
nfscl_layoutcommit(vnode_t vp, NFSPROC_T *p)
{
struct nfsclclient *clp;
struct nfscllayout *lyp;
struct nfsnode *np = VTONFS(vp);
mount_t mp;
struct nfsmount *nmp;
mp = vp->v_mount;
nmp = VFSTONFS(mp);
if (NFSHASNOLAYOUTCOMMIT(nmp))
return (0);
NFSLOCKCLSTATE();
clp = nmp->nm_clp;
if (clp == NULL) {
NFSUNLOCKCLSTATE();
return (EPERM);
}
lyp = nfscl_findlayout(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
if (lyp == NULL) {
NFSUNLOCKCLSTATE();
return (EPERM);
}
nfsv4_getref(&lyp->nfsly_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
if (NFSCL_FORCEDISM(mp)) {
NFSUNLOCKCLSTATE();
return (EPERM);
}
tryagain:
if ((lyp->nfsly_flags & NFSLY_WRITTEN) != 0) {
lyp->nfsly_flags &= ~NFSLY_WRITTEN;
NFSUNLOCKCLSTATE();
NFSCL_DEBUG(4, "do layoutcommit2\n");
nfscl_dolayoutcommit(clp->nfsc_nmp, lyp, NFSPROCCRED(p), p);
NFSLOCKCLSTATE();
goto tryagain;
}
nfsv4_relref(&lyp->nfsly_lock);
NFSUNLOCKCLSTATE();
return (0);
}
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