int
nfs_filestat(struct vnode *vp, struct filestat *fsp)
{
struct nfsnode nfsnode;
mode_t mode;
if (!kread(VTONFS(vp), &nfsnode, sizeof (nfsnode))) {
dprintf(stderr, "can't read nfsnode at %p for pid %d\n",
(void *)VTONFS(vp), Pid);
return 0;
}
fsp->fsid = nfsnode.n_vattr.va_fsid;
fsp->fileid = nfsnode.n_vattr.va_fileid;
fsp->size = nfsnode.n_size;
fsp->rdev = makeudev(nfsnode.n_vattr.va_rmajor,
nfsnode.n_vattr.va_rminor);
mode = (mode_t)nfsnode.n_vattr.va_mode;
switch (vp->v_type) {
case VREG:
mode |= S_IFREG;
break;
case VDIR:
mode |= S_IFDIR;
break;
case VBLK:
mode |= S_IFBLK;
break;
case VCHR:
mode |= S_IFCHR;
break;
case VLNK:
mode |= S_IFLNK;
break;
case VSOCK:
mode |= S_IFSOCK;
break;
case VFIFO:
mode |= S_IFIFO;
break;
case VDATABASE:
break;
case VINT:
case VNON:
case VBAD:
return 0;
}
fsp->mode = mode;
return 1;
}
static void
ncl_releasesillyrename(struct vnode *vp, struct thread *td)
{
struct nfsnode *np;
struct sillyrename *sp;
ASSERT_VOP_ELOCKED(vp, "releasesillyrename");
np = VTONFS(vp);
mtx_assert(&np->n_mtx, MA_OWNED);
if (vp->v_type != VDIR) {
sp = np->n_sillyrename;
np->n_sillyrename = NULL;
} else
sp = NULL;
if (sp != NULL) {
mtx_unlock(&np->n_mtx);
(void) ncl_vinvalbuf(vp, 0, td, 1);
/*
* Remove the silly file that was rename'd earlier
*/
ncl_removeit(sp, vp);
crfree(sp->s_cred);
sysmon_task_queue_sched(0, nfs_freesillyrename, sp);
mtx_lock(&np->n_mtx);
}
}
int
nfs_inactive(void *v)
{
struct vop_inactive_args /* {
struct vnode *a_vp;
bool *a_recycle;
} */ *ap = v;
struct nfsnode *np;
struct sillyrename *sp;
struct vnode *vp = ap->a_vp;
np = VTONFS(vp);
if (vp->v_type != VDIR) {
sp = np->n_sillyrename;
np->n_sillyrename = (struct sillyrename *)0;
} else
sp = NULL;
if (sp != NULL)
nfs_vinvalbuf(vp, 0, sp->s_cred, curlwp, 1);
*ap->a_recycle = (np->n_flag & NREMOVED) != 0;
np->n_flag &=
(NMODIFIED | NFLUSHINPROG | NFLUSHWANT | NEOFVALID | NTRUNCDELAYED);
if (vp->v_type == VDIR && np->n_dircache)
nfs_invaldircache(vp,
NFS_INVALDIRCACHE_FORCE | NFS_INVALDIRCACHE_KEEPEOF);
VOP_UNLOCK(vp);
if (sp != NULL) {
workqueue_enqueue(nfs_sillyworkq, &sp->s_work, NULL);
}
return (0);
}
/*
* Reclaim an nfsnode so that it can be used for other purposes.
*/
int
ncl_reclaim(struct vop_reclaim_args *ap)
{
struct vnode *vp = ap->a_vp;
struct nfsnode *np = VTONFS(vp);
struct nfsdmap *dp, *dp2;
if (NFS_ISV4(vp) && vp->v_type == VREG)
/*
* Since mmap()'d files do I/O after VOP_CLOSE(), the NFSv4
* Close operations are delayed until ncl_inactive().
* However, since VOP_INACTIVE() is not guaranteed to be
* called, we need to do it again here.
*/
(void) nfsrpc_close(vp, 1, ap->a_td);
/*
* If the NLM is running, give it a chance to abort pending
* locks.
*/
if (nfs_reclaim_p != NULL)
nfs_reclaim_p(ap);
/*
* Destroy the vm object and flush associated pages.
*/
vnode_destroy_vobject(vp);
vfs_hash_remove(vp);
/*
* Call nfscl_reclaimnode() to save attributes in the delegation,
* as required.
*/
if (vp->v_type == VREG)
nfscl_reclaimnode(vp);
/*
* Free up any directory cookie structures and
* large file handle structures that might be associated with
* this nfs node.
*/
if (vp->v_type == VDIR) {
dp = LIST_FIRST(&np->n_cookies);
while (dp) {
dp2 = dp;
dp = LIST_NEXT(dp, ndm_list);
FREE((caddr_t)dp2, M_NFSDIROFF);
}
}
if (np->n_writecred != NULL)
crfree(np->n_writecred);
FREE((caddr_t)np->n_fhp, M_NFSFH);
if (np->n_v4 != NULL)
FREE((caddr_t)np->n_v4, M_NFSV4NODE);
mtx_destroy(&np->n_mtx);
uma_zfree(newnfsnode_zone, vp->v_data);
vp->v_data = NULL;
return (0);
}
/*
* Reclaim an nfsnode so that it can be used for other purposes.
*/
int
ncl_reclaim(struct vop_reclaim_args *ap)
{
struct vnode *vp = ap->a_vp;
struct nfsnode *np = VTONFS(vp);
struct nfsdmap *dp, *dp2;
/*
* If the NLM is running, give it a chance to abort pending
* locks.
*/
if (nfs_reclaim_p != NULL)
nfs_reclaim_p(ap);
/*
* Destroy the vm object and flush associated pages.
*/
vnode_destroy_vobject(vp);
if (NFS_ISV4(vp) && vp->v_type == VREG)
/*
* We can now safely close any remaining NFSv4 Opens for
* this file. Most opens will have already been closed by
* ncl_inactive(), but there are cases where it is not
* called, so we need to do it again here.
*/
(void) nfsrpc_close(vp, 1, ap->a_td);
vfs_hash_remove(vp);
/*
* Call nfscl_reclaimnode() to save attributes in the delegation,
* as required.
*/
if (vp->v_type == VREG)
nfscl_reclaimnode(vp);
/*
* Free up any directory cookie structures and
* large file handle structures that might be associated with
* this nfs node.
*/
if (vp->v_type == VDIR) {
dp = LIST_FIRST(&np->n_cookies);
while (dp) {
dp2 = dp;
dp = LIST_NEXT(dp, ndm_list);
FREE((caddr_t)dp2, M_NFSDIROFF);
}
}
if (np->n_writecred != NULL)
crfree(np->n_writecred);
FREE((caddr_t)np->n_fhp, M_NFSFH);
if (np->n_v4 != NULL)
FREE((caddr_t)np->n_v4, M_NFSV4NODE);
mtx_destroy(&np->n_mtx);
uma_zfree(newnfsnode_zone, vp->v_data);
vp->v_data = NULL;
return (0);
}
int
nfs_inactive(struct vop_inactive_args *ap)
{
struct nfsnode *np;
struct sillyrename *sp;
struct thread *td = curthread; /* XXX */
np = VTONFS(ap->a_vp);
mtx_lock(&np->n_mtx);
if (ap->a_vp->v_type != VDIR) {
sp = np->n_sillyrename;
np->n_sillyrename = NULL;
} else
sp = NULL;
if (sp) {
mtx_unlock(&np->n_mtx);
(void)nfs_vinvalbuf(ap->a_vp, 0, td, 1);
/*
* Remove the silly file that was rename'd earlier
*/
(sp->s_removeit)(sp);
crfree(sp->s_cred);
TASK_INIT(&sp->s_task, 0, nfs_freesillyrename, sp);
taskqueue_enqueue(taskqueue_thread, &sp->s_task);
mtx_lock(&np->n_mtx);
}
np->n_flag &= NMODIFIED;
mtx_unlock(&np->n_mtx);
return (0);
}
int
nfs_filestat(struct vnode *vp, struct filestat *fsp)
{
struct nfsnode nfsnode;
mode_t mode;
if (!KVM_READ(VTONFS(vp), &nfsnode, sizeof (nfsnode))) {
dprintf("can't read nfsnode at %p for pid %ld",
VTONFS(vp), (long)Pid);
return 0;
}
fsp->fsid = nfsnode.n_vattr.va_fsid;
fsp->fileid = nfsnode.n_vattr.va_fileid;
fsp->size = nfsnode.n_size;
fsp->rdev = nfsnode.n_vattr.va_rdev;
mode = (mode_t)nfsnode.n_vattr.va_mode;
switch (vp->v_type) {
case VREG:
mode |= S_IFREG;
break;
case VDIR:
mode |= S_IFDIR;
break;
case VBLK:
mode |= S_IFBLK;
break;
case VCHR:
mode |= S_IFCHR;
break;
case VLNK:
mode |= S_IFLNK;
break;
case VSOCK:
mode |= S_IFSOCK;
break;
case VFIFO:
mode |= S_IFIFO;
break;
default:
break;
}
fsp->mode = mode;
return 1;
}
static int
nfs_vncmpf(struct vnode *vp, void *arg)
{
struct nfs_vncmp *a;
struct nfsnode *np;
a = arg;
np = VTONFS(vp);
return (bcmp(a->fh, np->n_fhp, a->fhsize));
}
/*
* Comparison function for vfs_hash functions.
*/
int
newnfs_vncmpf(struct vnode *vp, void *arg)
{
struct nfsfh *nfhp = (struct nfsfh *)arg;
struct nfsnode *np = VTONFS(vp);
if (np->n_fhp->nfh_len != nfhp->nfh_len ||
NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len))
return (1);
return (0);
}
int
ncl_inactive(struct vop_inactive_args *ap)
{
struct nfsnode *np;
struct sillyrename *sp;
struct vnode *vp = ap->a_vp;
boolean_t retv;
np = VTONFS(vp);
if (NFS_ISV4(vp) && vp->v_type == VREG) {
/*
* Since mmap()'d files do I/O after VOP_CLOSE(), the NFSv4
* Close operations are delayed until now. Any dirty
* buffers/pages must be flushed before the close, so that the
* stateid is available for the writes.
*/
if (vp->v_object != NULL) {
VM_OBJECT_WLOCK(vp->v_object);
retv = vm_object_page_clean(vp->v_object, 0, 0,
OBJPC_SYNC);
VM_OBJECT_WUNLOCK(vp->v_object);
} else
retv = TRUE;
if (retv == TRUE) {
(void)ncl_flush(vp, MNT_WAIT, NULL, ap->a_td, 1, 0);
(void)nfsrpc_close(vp, 1, ap->a_td);
}
}
mtx_lock(&np->n_mtx);
if (vp->v_type != VDIR) {
sp = np->n_sillyrename;
np->n_sillyrename = NULL;
} else
sp = NULL;
if (sp) {
mtx_unlock(&np->n_mtx);
(void) ncl_vinvalbuf(vp, 0, ap->a_td, 1);
/*
* Remove the silly file that was rename'd earlier
*/
ncl_removeit(sp, vp);
crfree(sp->s_cred);
TASK_INIT(&sp->s_task, 0, nfs_freesillyrename, sp);
taskqueue_enqueue(taskqueue_thread, &sp->s_task);
mtx_lock(&np->n_mtx);
}
np->n_flag &= NMODIFIED;
mtx_unlock(&np->n_mtx);
return (0);
}
int
nfs_print(struct vnode *vp)
{
struct nfsnode nfsnode, *np = &nfsnode;
char flagbuf[16], *flags = flagbuf;
int flag;
char *name;
mode_t type;
KGETRET(VTONFS(vp), &nfsnode, sizeof(nfsnode), "vnode's nfsnode");
flag = np->n_flag;
if (flag & NFLUSHWANT)
*flags++ = 'W';
if (flag & NFLUSHINPROG)
*flags++ = 'P';
if (flag & NLMODIFIED)
*flags++ = 'M';
if (flag & NRMODIFIED)
*flags++ = 'R';
if (flag & NWRITEERR)
*flags++ = 'E';
if (flag & NQNFSEVICTED)
*flags++ = 'G';
if (flag & NACC)
*flags++ = 'A';
if (flag & NUPD)
*flags++ = 'U';
if (flag & NCHG)
*flags++ = 'C';
if (flag & NLOCKED)
*flags++ = 'L';
if (flag & NWANTED)
*flags++ = 'w';
if (flag == 0)
*flags++ = '-';
*flags = '\0';
#define VT np->n_vattr
printf(" %6ju %5s", (uintmax_t)VT.va_fileid, flagbuf);
type = VT.va_mode & S_IFMT;
if (S_ISCHR(VT.va_mode) || S_ISBLK(VT.va_mode))
if (usenumflag || ((name = devname((VT.va_rmajor << 8) | VT.va_rminor, type)) == NULL))
printf(" %2d,%-2d",
VT.va_rmajor, VT.va_rminor);
else
printf(" %7s", name);
else
printf(" %7ju", (uintmax_t)np->n_size);
return (0);
}
/*
* Invalidate both the access and attribute caches for this vnode.
*/
void
ncl_invalcaches(struct vnode *vp)
{
struct nfsnode *np = VTONFS(vp);
int i;
mtx_lock(&np->n_mtx);
for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
np->n_accesscache[i].stamp = 0;
KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp);
np->n_attrstamp = 0;
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
mtx_unlock(&np->n_mtx);
}
/*
* Reclaim an nfsnode so that it can be used for other purposes.
*/
int
nfs_reclaim(void *v)
{
struct vop_reclaim_args /* {
struct vnode *a_vp;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct nfsnode *np = VTONFS(vp);
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
if (prtactive && vp->v_usecount > 1)
vprint("nfs_reclaim: pushing active", vp);
rw_enter(&nmp->nm_rbtlock, RW_WRITER);
rb_tree_remove_node(&nmp->nm_rbtree, np);
rw_exit(&nmp->nm_rbtlock);
/*
* Free up any directory cookie structures and
* large file handle structures that might be associated with
* this nfs node.
*/
if (vp->v_type == VDIR && np->n_dircache != NULL) {
nfs_invaldircache(vp, NFS_INVALDIRCACHE_FORCE);
hashdone(np->n_dircache, HASH_LIST, nfsdirhashmask);
}
KASSERT(np->n_dirgens == NULL);
if (np->n_fhsize > NFS_SMALLFH)
kmem_free(np->n_fhp, np->n_fhsize);
pool_put(&nfs_vattr_pool, np->n_vattr);
if (np->n_rcred)
kauth_cred_free(np->n_rcred);
if (np->n_wcred)
kauth_cred_free(np->n_wcred);
if (vp->v_type == VREG) {
mutex_destroy(&np->n_commitlock);
}
genfs_node_destroy(vp);
pool_put(&nfs_node_pool, np);
vp->v_data = NULL;
return (0);
}
/*
* Look up a vnode/nfsnode by file handle.
* Callers must check for mount points!!
* In all cases, a pointer to a
* nfsnode structure is returned.
*/
int
nfs_nget1(struct mount *mntp, nfsfh_t *fhp, int fhsize, struct nfsnode **npp,
int lkflags)
{
int error;
struct vnode *vp;
error = vcache_get(mntp, fhp, fhsize, &vp);
if (error)
return error;
error = vn_lock(vp, LK_EXCLUSIVE | lkflags);
if (error) {
vrele(vp);
return error;
}
*npp = VTONFS(vp);
return 0;
}
/*
* Reclaim an nfsnode so that it can be used for other purposes.
*/
int
nfs_reclaim(struct vop_reclaim_args *ap)
{
struct vnode *vp = ap->a_vp;
struct nfsnode *np = VTONFS(vp);
struct nfsdmap *dp, *dp2;
/*
* If the NLM is running, give it a chance to abort pending
* locks.
*/
if (nfs_reclaim_p)
nfs_reclaim_p(ap);
/*
* Destroy the vm object and flush associated pages.
*/
vnode_destroy_vobject(vp);
vfs_hash_remove(vp);
/*
* Free up any directory cookie structures and
* large file handle structures that might be associated with
* this nfs node.
*/
if (vp->v_type == VDIR) {
dp = LIST_FIRST(&np->n_cookies);
while (dp) {
dp2 = dp;
dp = LIST_NEXT(dp, ndm_list);
free((caddr_t)dp2, M_NFSDIROFF);
}
}
if (np->n_writecred != NULL)
crfree(np->n_writecred);
if (np->n_fhsize > NFS_SMALLFH) {
free((caddr_t)np->n_fhp, M_NFSBIGFH);
}
mtx_destroy(&np->n_mtx);
uma_zfree(nfsnode_zone, vp->v_data);
vp->v_data = NULL;
return (0);
}
int
nfs_inactive(void *v)
{
struct vop_inactive_args *ap = v;
struct nfsnode *np;
struct sillyrename *sp;
#ifdef DIAGNOSTIC
if (prtactive && ap->a_vp->v_usecount != 0)
vprint("nfs_inactive: pushing active", ap->a_vp);
#endif
if (ap->a_vp->v_flag & VLARVAL)
/*
* vnode was incompletely set up, just return
* as we are throwing it away.
*/
return(0);
#ifdef DIAGNOSTIC
if (ap->a_vp->v_data == NULL)
panic("NULL v_data (no nfsnode set up?) in vnode %p",
ap->a_vp);
#endif
np = VTONFS(ap->a_vp);
if (ap->a_vp->v_type != VDIR) {
sp = np->n_sillyrename;
np->n_sillyrename = NULL;
} else
sp = NULL;
if (sp) {
/*
* Remove the silly file that was rename'd earlier
*/
nfs_vinvalbuf(ap->a_vp, 0, sp->s_cred, curproc);
nfs_removeit(sp);
crfree(sp->s_cred);
vrele(sp->s_dvp);
free(sp, M_NFSREQ, sizeof(*sp));
}
np->n_flag &= (NMODIFIED | NFLUSHINPROG | NFLUSHWANT);
VOP_UNLOCK(ap->a_vp, ap->a_p);
return (0);
}
int
ncl_inactive(struct vop_inactive_args *ap)
{
struct vnode *vp = ap->a_vp;
struct nfsnode *np;
boolean_t retv;
if (NFS_ISV4(vp) && vp->v_type == VREG) {
/*
* Since mmap()'d files do I/O after VOP_CLOSE(), the NFSv4
* Close operations are delayed until now. Any dirty
* buffers/pages must be flushed before the close, so that the
* stateid is available for the writes.
*/
if (vp->v_object != NULL) {
VM_OBJECT_WLOCK(vp->v_object);
retv = vm_object_page_clean(vp->v_object, 0, 0,
OBJPC_SYNC);
VM_OBJECT_WUNLOCK(vp->v_object);
} else
retv = TRUE;
if (retv == TRUE) {
(void)ncl_flush(vp, MNT_WAIT, NULL, ap->a_td, 1, 0);
(void)nfsrpc_close(vp, 1, ap->a_td);
}
}
np = VTONFS(vp);
mtx_lock(&np->n_mtx);
ncl_releasesillyrename(vp, ap->a_td);
/*
* NMODIFIED means that there might be dirty/stale buffers
* associated with the NFS vnode. None of the other flags are
* meaningful after the vnode is unused.
*/
np->n_flag &= NMODIFIED;
mtx_unlock(&np->n_mtx);
return (0);
}
/*
* Reclaim an nfsnode so that it can be used for other purposes.
*/
int
nfs_reclaim(void *v)
{
struct vop_reclaim_args *ap = v;
struct vnode *vp = ap->a_vp;
struct nfsmount *nmp;
struct nfsnode *np = VTONFS(vp);
#ifdef DIAGNOSTIC
if (prtactive && vp->v_usecount != 0)
vprint("nfs_reclaim: pushing active", vp);
#endif
if (ap->a_vp->v_flag & VLARVAL)
/*
* vnode was incompletely set up, just return
* as we are throwing it away.
*/
return(0);
#ifdef DIAGNOSTIC
if (ap->a_vp->v_data == NULL)
panic("NULL v_data (no nfsnode set up?) in vnode %p",
ap->a_vp);
#endif
nmp = VFSTONFS(vp->v_mount);
rw_enter_write(&nfs_hashlock);
RB_REMOVE(nfs_nodetree, &nmp->nm_ntree, np);
rw_exit_write(&nfs_hashlock);
if (np->n_rcred)
crfree(np->n_rcred);
if (np->n_wcred)
crfree(np->n_wcred);
cache_purge(vp);
pool_put(&nfs_node_pool, vp->v_data);
vp->v_data = NULL;
return (0);
}
/*
* Extract the information needed by the nlm from the nfs vnode.
*/
static void
nfs_getnlminfo(struct vnode *vp, uint8_t *fhp, size_t *fhlenp,
struct sockaddr_storage *sp, int *is_v3p, off_t *sizep,
struct timeval *timeop)
{
struct nfsmount *nmp;
struct nfsnode *np = VTONFS(vp);
nmp = VFSTONFS(vp->v_mount);
if (fhlenp != NULL)
*fhlenp = (size_t)np->n_fhsize;
if (fhp != NULL)
bcopy(np->n_fhp, fhp, np->n_fhsize);
if (sp != NULL)
bcopy(nmp->nm_nam, sp, min(nmp->nm_nam->sa_len, sizeof(*sp)));
if (is_v3p != NULL)
*is_v3p = NFS_ISV3(vp);
if (sizep != NULL)
*sizep = np->n_size;
if (timeop != NULL) {
timeop->tv_sec = nmp->nm_timeo / NFS_HZ;
timeop->tv_usec = (nmp->nm_timeo % NFS_HZ) * (1000000 / NFS_HZ);
}
}
* if there is no nfsowner table yet, allocate one.
*/
if (p->p_nlminfo == NULL) {
MALLOC(p->p_nlminfo, struct nlminfo *,
sizeof(struct nlminfo), M_LOCKF, M_WAITOK | M_ZERO);
p->p_nlminfo->pid_start = p->p_stats->p_start;
}
msg.lm_msg_ident.pid_start = p->p_nlminfo->pid_start;
msg.lm_msg_ident.msg_seq = ++(p->p_nlminfo->msg_seq);
msg.lm_fl = *fl;
msg.lm_wait = ap->a_flags & F_WAIT;
msg.lm_getlk = ap->a_op == F_GETLK;
bcopy(VFSTONFS(vp->v_mount)->nm_nam, &msg.lm_addr,
min(sizeof msg.lm_addr, VFSTONFS(vp->v_mount)->nm_nam->sa_len));
msg.lm_fh_len = NFS_ISV3(vp) ? VTONFS(vp)->n_fhsize : NFSX_V2FH;
bcopy(VTONFS(vp)->n_fhp, msg.lm_fh, msg.lm_fh_len);
msg.lm_nfsv3 = NFS_ISV3(vp);
cru2x(td->td_ucred, &msg.lm_cred);
/*
* Open the lock fifo. If for any reason we don't find the fifo, it
* means that the lock daemon isn't running. Translate any missing
* file error message for the user, otherwise the application will
* complain that the user's file is missing, which isn't the case.
* Note that we use proc0's cred, so the fifo is opened as root.
*
* XXX: Note that this behavior is relative to the root directory
* of the current process, and this may result in a variety of
* {functional, security} problems in chroot() environments.
*/
/*
* ONLY USED FOR THE ROOT DIRECTORY. nfscl_nget() does the rest. If this
* function is going to be used to get Regular Files, code must be added
* to fill in the "struct nfsv4node".
* Look up a vnode/nfsnode by file handle.
* Callers must check for mount points!!
* In all cases, a pointer to a
* nfsnode structure is returned.
*/
int
ncl_nget(struct mount *mntp, u_int8_t *fhp, int fhsize, struct nfsnode **npp,
int lkflags)
{
struct thread *td = curthread; /* XXX */
struct nfsnode *np;
struct vnode *vp;
struct vnode *nvp;
int error;
u_int hash;
struct nfsmount *nmp;
struct nfsfh *nfhp;
nmp = VFSTONFS(mntp);
*npp = NULL;
hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT);
MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize,
M_NFSFH, M_WAITOK);
bcopy(fhp, &nfhp->nfh_fh[0], fhsize);
nfhp->nfh_len = fhsize;
error = vfs_hash_get(mntp, hash, lkflags,
td, &nvp, newnfs_vncmpf, nfhp);
FREE(nfhp, M_NFSFH);
if (error)
return (error);
if (nvp != NULL) {
*npp = VTONFS(nvp);
return (0);
}
np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO);
error = getnewvnode("newnfs", mntp, &newnfs_vnodeops, &nvp);
if (error) {
uma_zfree(newnfsnode_zone, np);
return (error);
}
vp = nvp;
KASSERT(vp->v_bufobj.bo_bsize != 0, ("ncl_nget: bo_bsize == 0"));
vp->v_bufobj.bo_ops = &buf_ops_newnfs;
vp->v_data = np;
np->n_vnode = vp;
/*
* Initialize the mutex even if the vnode is going to be a loser.
* This simplifies the logic in reclaim, which can then unconditionally
* destroy the mutex (in the case of the loser, or if hash_insert
* happened to return an error no special casing is needed).
*/
mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK);
/*
* NFS supports recursive and shared locking.
*/
lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL);
VN_LOCK_AREC(vp);
VN_LOCK_ASHARE(vp);
/*
* Are we getting the root? If so, make sure the vnode flags
* are correct
*/
if ((fhsize == nmp->nm_fhsize) &&
!bcmp(fhp, nmp->nm_fh, fhsize)) {
if (vp->v_type == VNON)
vp->v_type = VDIR;
vp->v_vflag |= VV_ROOT;
}
MALLOC(np->n_fhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize,
M_NFSFH, M_WAITOK);
bcopy(fhp, np->n_fhp->nfh_fh, fhsize);
np->n_fhp->nfh_len = fhsize;
error = insmntque(vp, mntp);
if (error != 0) {
*npp = NULL;
FREE((caddr_t)np->n_fhp, M_NFSFH);
mtx_destroy(&np->n_mtx);
uma_zfree(newnfsnode_zone, np);
return (error);
}
error = vfs_hash_insert(vp, hash, lkflags,
td, &nvp, newnfs_vncmpf, np->n_fhp);
if (error)
return (error);
if (nvp != NULL) {
*npp = VTONFS(nvp);
/* vfs_hash_insert() vput()'s the losing vnode */
return (0);
}
*npp = np;
return (0);
}
/*
* nfs statvfs call
*/
int
nfs_statvfs(struct mount *mp, struct statvfs *sbp)
{
struct lwp *l = curlwp;
struct vnode *vp;
struct nfs_statfs *sfp;
char *cp;
u_int32_t *tl;
int32_t t1, t2;
char *bpos, *dpos, *cp2;
struct nfsmount *nmp = VFSTONFS(mp);
int error = 0, retattr;
#ifdef NFS_V2_ONLY
const int v3 = 0;
#else
int v3 = (nmp->nm_flag & NFSMNT_NFSV3);
#endif
struct mbuf *mreq, *mrep = NULL, *md, *mb;
kauth_cred_t cred;
u_quad_t tquad;
struct nfsnode *np;
#ifndef nolint
sfp = (struct nfs_statfs *)0;
#endif
vp = nmp->nm_vnode;
np = VTONFS(vp);
cred = kauth_cred_alloc();
#ifndef NFS_V2_ONLY
if (v3 && (nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0)
(void)nfs_fsinfo(nmp, vp, cred, l);
#endif
nfsstats.rpccnt[NFSPROC_FSSTAT]++;
nfsm_reqhead(np, NFSPROC_FSSTAT, NFSX_FH(v3));
nfsm_fhtom(np, v3);
nfsm_request(np, NFSPROC_FSSTAT, l, cred);
if (v3)
nfsm_postop_attr(vp, retattr, 0);
if (error) {
if (mrep != NULL) {
if (mrep->m_next != NULL)
printf("nfs_vfsops: nfs_statvfs would lose buffers\n");
m_freem(mrep);
}
goto nfsmout;
}
nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3));
sbp->f_flag = nmp->nm_flag;
sbp->f_iosize = min(nmp->nm_rsize, nmp->nm_wsize);
if (v3) {
sbp->f_frsize = sbp->f_bsize = NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp->sf_tbytes);
sbp->f_blocks = ((quad_t)tquad / (quad_t)NFS_FABLKSIZE);
tquad = fxdr_hyper(&sfp->sf_fbytes);
sbp->f_bfree = ((quad_t)tquad / (quad_t)NFS_FABLKSIZE);
tquad = fxdr_hyper(&sfp->sf_abytes);
tquad = ((quad_t)tquad / (quad_t)NFS_FABLKSIZE);
sbp->f_bresvd = sbp->f_bfree - tquad;
sbp->f_bavail = tquad;
/* Handle older NFS servers returning negative values */
if ((quad_t)sbp->f_bavail < 0)
sbp->f_bavail = 0;
tquad = fxdr_hyper(&sfp->sf_tfiles);
sbp->f_files = tquad;
tquad = fxdr_hyper(&sfp->sf_ffiles);
sbp->f_ffree = tquad;
sbp->f_favail = tquad;
sbp->f_fresvd = 0;
sbp->f_namemax = NFS_MAXNAMLEN;
} else {
sbp->f_bsize = NFS_FABLKSIZE;
sbp->f_frsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
sbp->f_fresvd = 0;
sbp->f_files = 0;
sbp->f_ffree = 0;
sbp->f_favail = 0;
sbp->f_fresvd = 0;
sbp->f_namemax = NFS_MAXNAMLEN;
}
copy_statvfs_info(sbp, mp);
nfsm_reqdone;
kauth_cred_free(cred);
return (error);
}
/*
* nfs version 3 fsinfo rpc call
*/
int
nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, kauth_cred_t cred, struct lwp *l)
{
struct nfsv3_fsinfo *fsp;
char *cp;
int32_t t1, t2;
u_int32_t *tl, pref, xmax;
char *bpos, *dpos, *cp2;
int error = 0, retattr;
struct mbuf *mreq, *mrep, *md, *mb;
u_int64_t maxfsize;
struct nfsnode *np = VTONFS(vp);
nfsstats.rpccnt[NFSPROC_FSINFO]++;
nfsm_reqhead(np, NFSPROC_FSINFO, NFSX_FH(1));
nfsm_fhtom(np, 1);
nfsm_request(np, NFSPROC_FSINFO, l, cred);
nfsm_postop_attr(vp, retattr, 0);
if (!error) {
nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO);
pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref);
if ((nmp->nm_flag & NFSMNT_WSIZE) == 0 &&
pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE)
nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) &
~(NFS_FABLKSIZE - 1);
xmax = fxdr_unsigned(u_int32_t, fsp->fs_wtmax);
if (xmax < nmp->nm_wsize && xmax > 0) {
nmp->nm_wsize = xmax & ~(NFS_FABLKSIZE - 1);
if (nmp->nm_wsize == 0)
nmp->nm_wsize = xmax;
}
pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref);
if ((nmp->nm_flag & NFSMNT_RSIZE) == 0 &&
pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE)
nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) &
~(NFS_FABLKSIZE - 1);
xmax = fxdr_unsigned(u_int32_t, fsp->fs_rtmax);
if (xmax < nmp->nm_rsize && xmax > 0) {
nmp->nm_rsize = xmax & ~(NFS_FABLKSIZE - 1);
if (nmp->nm_rsize == 0)
nmp->nm_rsize = xmax;
}
pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref);
if (pref < nmp->nm_readdirsize && pref >= NFS_DIRFRAGSIZ)
nmp->nm_readdirsize = (pref + NFS_DIRFRAGSIZ - 1) &
~(NFS_DIRFRAGSIZ - 1);
if (xmax < nmp->nm_readdirsize && xmax > 0) {
nmp->nm_readdirsize = xmax & ~(NFS_DIRFRAGSIZ - 1);
if (nmp->nm_readdirsize == 0)
nmp->nm_readdirsize = xmax;
}
/* XXX */
nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1;
maxfsize = fxdr_hyper(&fsp->fs_maxfilesize);
if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize)
nmp->nm_maxfilesize = maxfsize;
nmp->nm_mountp->mnt_fs_bshift =
ffs(MIN(nmp->nm_rsize, nmp->nm_wsize)) - 1;
nmp->nm_iflag |= NFSMNT_GOTFSINFO;
}
nfsm_reqdone;
return (error);
}
/*
* Mount a remote root fs via. nfs. This depends on the info in the
* nfs_diskless structure that has been filled in properly by some primary
* bootstrap.
* It goes something like this:
* - do enough of "ifconfig" by calling ifioctl() so that the system
* can talk to the server
* - If nfs_diskless.mygateway is filled in, use that address as
* a default gateway.
* - build the rootfs mount point and call mountnfs() to do the rest.
*/
int
nfs_mountroot(struct mount *mp)
{
struct mount *swap_mp;
struct nfsv3_diskless *nd = &nfsv3_diskless;
struct socket *so;
struct vnode *vp;
struct thread *td = curthread; /* XXX */
int error, i;
u_long l;
char buf[128];
#if defined(BOOTP_NFSROOT) && defined(BOOTP)
bootpc_init(); /* use bootp to get nfs_diskless filled in */
#endif
/*
* XXX time must be non-zero when we init the interface or else
* the arp code will wedge...
*/
while (mycpu->gd_time_seconds == 0)
tsleep(mycpu, 0, "arpkludge", 10);
/*
* The boot code may have passed us a diskless structure.
*/
kprintf("DISKLESS %d\n", nfs_diskless_valid);
if (nfs_diskless_valid == 1)
nfs_convert_diskless();
/*
* NFSv3 is required.
*/
nd->root_args.flags |= NFSMNT_NFSV3 | NFSMNT_RDIRPLUS;
nd->swap_args.flags |= NFSMNT_NFSV3;
#define SINP(sockaddr) ((struct sockaddr_in *)(sockaddr))
kprintf("nfs_mountroot: interface %s ip %s",
nd->myif.ifra_name,
inet_ntoa(SINP(&nd->myif.ifra_addr)->sin_addr));
kprintf(" bcast %s",
inet_ntoa(SINP(&nd->myif.ifra_broadaddr)->sin_addr));
kprintf(" mask %s\n",
inet_ntoa(SINP(&nd->myif.ifra_mask)->sin_addr));
#undef SINP
/*
* XXX splnet, so networks will receive...
*/
crit_enter();
/*
* BOOTP does not necessarily have to be compiled into the kernel
* for an NFS root to work. If we inherited the network
* configuration for PXEBOOT then pxe_setup_nfsdiskless() has figured
* out our interface for us and all we need to do is ifconfig the
* interface. We only do this if the interface has not already been
* ifconfig'd by e.g. BOOTP.
*/
error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td);
if (error) {
panic("nfs_mountroot: socreate(%04x): %d",
nd->myif.ifra_addr.sa_family, error);
}
error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, proc0.p_ucred);
if (error)
panic("nfs_mountroot: SIOCAIFADDR: %d", error);
soclose(so, FNONBLOCK);
/*
* If the gateway field is filled in, set it as the default route.
*/
if (nd->mygateway.sin_len != 0) {
struct sockaddr_in mask, sin;
bzero((caddr_t)&mask, sizeof(mask));
sin = mask;
sin.sin_family = AF_INET;
sin.sin_len = sizeof(sin);
kprintf("nfs_mountroot: gateway %s\n",
inet_ntoa(nd->mygateway.sin_addr));
error = rtrequest_global(RTM_ADD, (struct sockaddr *)&sin,
(struct sockaddr *)&nd->mygateway,
(struct sockaddr *)&mask,
RTF_UP | RTF_GATEWAY);
if (error)
kprintf("nfs_mountroot: unable to set gateway, error %d, continuing anyway\n", error);
}
/*
* Create the rootfs mount point.
*/
nd->root_args.fh = nd->root_fh;
nd->root_args.fhsize = nd->root_fhsize;
l = ntohl(nd->root_saddr.sin_addr.s_addr);
ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
(l >> 24) & 0xff, (l >> 16) & 0xff,
(l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam);
kprintf("NFS_ROOT: %s\n",buf);
error = nfs_mountdiskless(buf, "/", MNT_RDONLY, &nd->root_saddr,
&nd->root_args, td, &vp, &mp);
if (error) {
mp->mnt_vfc->vfc_refcount--;
crit_exit();
return (error);
}
swap_mp = NULL;
if (nd->swap_nblks) {
/* Convert to DEV_BSIZE instead of Kilobyte */
nd->swap_nblks *= 2;
/*
* Create a fake mount point just for the swap vnode so that the
* swap file can be on a different server from the rootfs.
*/
nd->swap_args.fh = nd->swap_fh;
nd->swap_args.fhsize = nd->swap_fhsize;
l = ntohl(nd->swap_saddr.sin_addr.s_addr);
ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
(l >> 24) & 0xff, (l >> 16) & 0xff,
(l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam);
kprintf("NFS SWAP: %s\n",buf);
error = nfs_mountdiskless(buf, "/swap", 0, &nd->swap_saddr,
&nd->swap_args, td, &vp, &swap_mp);
if (error) {
crit_exit();
return (error);
}
vfs_unbusy(swap_mp);
VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size =
nd->swap_nblks * DEV_BSIZE ;
/*
* Since the swap file is not the root dir of a file system,
* hack it to a regular file.
*/
vclrflags(vp, VROOT);
vref(vp);
nfs_setvtype(vp, VREG);
swaponvp(td, vp, nd->swap_nblks);
}
void
nfs4_vnop_loadattrcache(struct vnode *vp, struct nfsv4_fattr *fap,
struct vattr *vaper)
{
struct vattr *vap;
struct nfsnode *np;
int32_t rdev;
enum vtype vtyp;
u_short vmode;
struct timespec mtime;
struct timeval tv;
microtime(&tv);
vtyp = nv3tov_type[fap->fa4_type & 0x7];
vmode = (fap->fa4_valid & FA4V_MODE) ? fap->fa4_mode : 0777;
rdev = (fap->fa4_valid & FA4V_RDEV) ?
makeudev(fap->fa4_rdev_major, fap->fa4_rdev_minor) : 0;
if (fap->fa4_valid & FA4V_MTIME)
mtime = fap->fa4_mtime;
else
bzero(&mtime, sizeof mtime);
/*
* If v_type == VNON it is a new node, so fill in the v_type,
* n_mtime fields. Check to see if it represents a special
* device, and if so, check for a possible alias. Once the
* correct vnode has been obtained, fill in the rest of the
* information.
*/
np = VTONFS(vp);
vap = &np->n_vattr;
if (vp->v_type != vtyp || np->n_mtime == 0) {
bzero(vap, sizeof *vap);
vp->v_type = vtyp;
np->n_mtime = mtime.tv_sec;
}
vap->va_type = vtyp;
vap->va_mode = (vmode & 07777);
vap->va_rdev = rdev;
vap->va_mtime = mtime;
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
if (fap->fa4_valid & FA4V_NLINK)
vap->va_nlink = fap->fa4_nlink;
if (fap->fa4_valid & FA4V_UID)
vap->va_uid = fap->fa4_uid;
if (fap->fa4_valid & FA4V_GID)
vap->va_gid = fap->fa4_gid;
vap->va_size = fap->fa4_size;
vap->va_blocksize = NFS_FABLKSIZE;
vap->va_bytes = fap->fa4_size;
if (fap->fa4_valid & FA4V_FILEID)
vap->va_fileid = nfs_v4fileid4_to_fileid(fap->fa4_fileid);
if (fap->fa4_valid & FA4V_ATIME)
vap->va_atime = fap->fa4_atime;
if (fap->fa4_valid & FA4V_CTIME)
vap->va_ctime = fap->fa4_ctime;
vap->va_flags = 0;
vap->va_filerev = 0;
/* XXX dontshrink flag? */
if (vap->va_size != np->n_size) {
if (vap->va_type == VREG) {
if (np->n_flag & NMODIFIED) {
if (vap->va_size < np->n_size)
vap->va_size = np->n_size;
else
np->n_size = vap->va_size;
} else
np->n_size = vap->va_size;
vnode_pager_setsize(vp, np->n_size);
} else
np->n_size = vap->va_size;
}
np->n_attrstamp = tv.tv_sec;
if (vaper != NULL) {
bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
if (np->n_flag & NCHG) {
if (np->n_flag & NACC)
vaper->va_atime = np->n_atim;
if (np->n_flag & NUPD)
vaper->va_mtime = np->n_mtim;
}
}
}
/*
* Look up a vnode/nfsnode by file handle.
* Callers must check for mount points!!
* In all cases, a pointer to a
* nfsnode structure is returned.
*/
int
nfs_nget(struct mount *mntp, nfsfh_t *fhp, int fhsize, struct nfsnode **npp, int flags)
{
struct thread *td = curthread; /* XXX */
struct nfsnode *np;
struct vnode *vp;
struct vnode *nvp;
int error;
u_int hash;
struct nfsmount *nmp;
struct nfs_vncmp ncmp;
nmp = VFSTONFS(mntp);
*npp = NULL;
hash = fnv_32_buf(fhp->fh_bytes, fhsize, FNV1_32_INIT);
ncmp.fhsize = fhsize;
ncmp.fh = fhp;
error = vfs_hash_get(mntp, hash, flags,
td, &nvp, nfs_vncmpf, &ncmp);
if (error)
return (error);
if (nvp != NULL) {
*npp = VTONFS(nvp);
return (0);
}
/*
* Allocate before getnewvnode since doing so afterward
* might cause a bogus v_data pointer to get dereferenced
* elsewhere if zalloc should block.
*/
np = uma_zalloc(nfsnode_zone, M_WAITOK | M_ZERO);
error = getnewvnode("nfs", mntp, &nfs_vnodeops, &nvp);
if (error) {
uma_zfree(nfsnode_zone, np);
return (error);
}
vp = nvp;
vp->v_bufobj.bo_ops = &buf_ops_nfs;
vp->v_data = np;
np->n_vnode = vp;
/*
* Initialize the mutex even if the vnode is going to be a loser.
* This simplifies the logic in reclaim, which can then unconditionally
* destroy the mutex (in the case of the loser, or if hash_insert happened
* to return an error no special casing is needed).
*/
mtx_init(&np->n_mtx, "NFSnode lock", NULL, MTX_DEF);
/*
* NFS supports recursive and shared locking.
*/
lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL);
VN_LOCK_AREC(vp);
VN_LOCK_ASHARE(vp);
if (fhsize > NFS_SMALLFH) {
np->n_fhp = malloc(fhsize, M_NFSBIGFH, M_WAITOK);
} else
np->n_fhp = &np->n_fh;
bcopy((caddr_t)fhp, (caddr_t)np->n_fhp, fhsize);
np->n_fhsize = fhsize;
error = insmntque(vp, mntp);
if (error != 0) {
*npp = NULL;
if (np->n_fhsize > NFS_SMALLFH) {
free((caddr_t)np->n_fhp, M_NFSBIGFH);
}
mtx_destroy(&np->n_mtx);
uma_zfree(nfsnode_zone, np);
return (error);
}
error = vfs_hash_insert(vp, hash, flags,
td, &nvp, nfs_vncmpf, &ncmp);
if (error)
return (error);
if (nvp != NULL) {
*npp = VTONFS(nvp);
/* vfs_hash_insert() vput()'s the losing vnode */
return (0);
}
*npp = np;
return (0);
}
/*
* Check the time stamp
* If the cache is valid, copy contents to *vap and return 0
* otherwise return an error
*/
int
ncl_getattrcache(struct vnode *vp, struct vattr *vaper)
{
struct nfsnode *np;
struct vattr *vap;
struct nfsmount *nmp;
int timeo, mustflush;
np = VTONFS(vp);
vap = &np->n_vattr.na_vattr;
nmp = VFSTONFS(vp->v_mount);
mustflush = nfscl_mustflush(vp); /* must be before mtx_lock() */
mtx_lock(&np->n_mtx);
/* XXX n_mtime doesn't seem to be updated on a miss-and-reload */
timeo = (time_second - np->n_mtime.tv_sec) / 10;
#ifdef NFS_ACDEBUG
if (nfs_acdebug>1)
printf("ncl_getattrcache: initial timeo = %d\n", timeo);
#endif
if (vap->va_type == VDIR) {
if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin)
timeo = nmp->nm_acdirmin;
else if (timeo > nmp->nm_acdirmax)
timeo = nmp->nm_acdirmax;
} else {
if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin)
timeo = nmp->nm_acregmin;
else if (timeo > nmp->nm_acregmax)
timeo = nmp->nm_acregmax;
}
#ifdef NFS_ACDEBUG
if (nfs_acdebug > 2)
printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n",
nmp->nm_acregmin, nmp->nm_acregmax,
nmp->nm_acdirmin, nmp->nm_acdirmax);
if (nfs_acdebug)
printf("ncl_getattrcache: age = %d; final timeo = %d\n",
(time_second - np->n_attrstamp), timeo);
#endif
if ((time_second - np->n_attrstamp) >= timeo &&
(mustflush != 0 || np->n_attrstamp == 0)) {
nfsstatsv1.attrcache_misses++;
mtx_unlock(&np->n_mtx);
KDTRACE_NFS_ATTRCACHE_GET_MISS(vp);
return( ENOENT);
}
nfsstatsv1.attrcache_hits++;
if (vap->va_size != np->n_size) {
if (vap->va_type == VREG) {
if (np->n_flag & NMODIFIED) {
if (vap->va_size < np->n_size)
vap->va_size = np->n_size;
else
np->n_size = vap->va_size;
} else {
np->n_size = vap->va_size;
}
vnode_pager_setsize(vp, np->n_size);
} else {
np->n_size = vap->va_size;
}
}
bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
if (np->n_flag & NCHG) {
if (np->n_flag & NACC)
vaper->va_atime = np->n_atim;
if (np->n_flag & NUPD)
vaper->va_mtime = np->n_mtim;
}
mtx_unlock(&np->n_mtx);
KDTRACE_NFS_ATTRCACHE_GET_HIT(vp, vap);
return (0);
}
/*
* Look up a vnode/nfsnode by file handle.
* Callers must check for mount points!!
* In all cases, a pointer to a
* nfsnode structure is returned.
* This variant takes a "struct nfsfh *" as second argument and uses
* that structure up, either by hanging off the nfsnode or FREEing it.
*/
int
nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp,
struct componentname *cnp, struct thread *td, struct nfsnode **npp,
void *stuff, int lkflags)
{
struct nfsnode *np, *dnp;
struct vnode *vp, *nvp;
struct nfsv4node *newd, *oldd;
int error;
u_int hash;
struct nfsmount *nmp;
nmp = VFSTONFS(mntp);
dnp = VTONFS(dvp);
*npp = NULL;
hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT);
error = vfs_hash_get(mntp, hash, lkflags,
td, &nvp, newnfs_vncmpf, nfhp);
if (error == 0 && nvp != NULL) {
/*
* I believe there is a slight chance that vgonel() could
* get called on this vnode between when NFSVOPLOCK() drops
* the VI_LOCK() and vget() acquires it again, so that it
* hasn't yet had v_usecount incremented. If this were to
* happen, the VI_DOOMED flag would be set, so check for
* that here. Since we now have the v_usecount incremented,
* we should be ok until we vrele() it, if the VI_DOOMED
* flag isn't set now.
*/
VI_LOCK(nvp);
if ((nvp->v_iflag & VI_DOOMED)) {
VI_UNLOCK(nvp);
vrele(nvp);
error = ENOENT;
} else {
VI_UNLOCK(nvp);
}
}
if (error) {
FREE((caddr_t)nfhp, M_NFSFH);
return (error);
}
if (nvp != NULL) {
np = VTONFS(nvp);
/*
* For NFSv4, check to see if it is the same name and
* replace the name, if it is different.
*/
oldd = newd = NULL;
if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL &&
nvp->v_type == VREG &&
(np->n_v4->n4_namelen != cnp->cn_namelen ||
NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
cnp->cn_namelen) ||
dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
dnp->n_fhp->nfh_len))) {
MALLOC(newd, struct nfsv4node *,
sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len +
+ cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK);
NFSLOCKNODE(np);
if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG
&& (np->n_v4->n4_namelen != cnp->cn_namelen ||
NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
cnp->cn_namelen) ||
dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
dnp->n_fhp->nfh_len))) {
oldd = np->n_v4;
np->n_v4 = newd;
newd = NULL;
np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
np->n_v4->n4_namelen = cnp->cn_namelen;
NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
dnp->n_fhp->nfh_len);
NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
cnp->cn_namelen);
}
NFSUNLOCKNODE(np);
}
