/* $NetBSD: nfs_clport.c,v 1.2 2016/12/13 22:17:33 pgoyette Exp $ */
/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/*
* 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;
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);
}
if (newd != NULL)
FREE((caddr_t)newd, M_NFSV4NODE);
if (oldd != NULL)
FREE((caddr_t)oldd, M_NFSV4NODE);
*npp = np;
FREE((caddr_t)nfhp, M_NFSFH);
return (0);
}
np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO);
error = getnewvnode(nfs_vnode_tag, mntp, &newnfs_vnodeops, &nvp);
if (error) {
uma_zfree(newnfsnode_zone, np);
FREE((caddr_t)nfhp, M_NFSFH);
return (error);
}
vp = nvp;
KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_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);
/*
* Are we getting the root? If so, make sure the vnode flags
* are correct
*/
if ((nfhp->nfh_len == nmp->nm_fhsize) &&
!bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len)) {
if (vp->v_type == VNON)
vp->v_type = VDIR;
vp->v_vflag |= VV_ROOT;
}
np->n_fhp = nfhp;
/*
* For NFSv4, we have to attach the directory file handle and
* file name, so that Open Ops can be done later.
*/
if (nmp->nm_flag & NFSMNT_NFSV4) {
MALLOC(np->n_v4, struct nfsv4node *, sizeof (struct nfsv4node)
+ dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE,
M_WAITOK);
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);
} else {
np->n_v4 = NULL;
}
/*
* Another variant of nfs_nget(). This one is only used by reopen. It
* takes almost the same args as nfs_nget(), but only succeeds if an entry
* exists in the cache. (Since files should already be "open" with a
* vnode ref cnt on the node when reopen calls this, it should always
* succeed.)
* Also, don't get a vnode lock, since it may already be locked by some
* other process that is handling it. This is ok, since all other threads
* on the client are blocked by the nfsc_lock being exclusively held by the
* caller of this function.
*/
int
nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize,
struct thread *td, struct nfsnode **npp)
{
struct vnode *nvp;
u_int hash;
struct nfsfh *nfhp;
int error;
/*
* First, try to get the vnode locked, but don't block for the lock.
*/
error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp,
newnfs_vncmpf, nfhp);
if (error == 0 && nvp != NULL) {
NFSVOPUNLOCK(nvp, 0);
} else if (error == EBUSY) {
/*
* It is safe so long as a vflush() with
* FORCECLOSE has not been done. Since the Renew thread is
* stopped and the MNTK_UNMOUNTF flag is set before doing
* a vflush() with FORCECLOSE, we should be ok here.
*/
if ((mntp->mnt_kern_flag & MNTK_UNMOUNTF))
error = EINTR;
else {
vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp);
if (nvp == NULL) {
error = ENOENT;
} else if ((nvp->v_iflag & VI_DOOMED) != 0) {
error = ENOENT;
vrele(nvp);
} else {
error = 0;
}
}
}
FREE(nfhp, M_NFSFH);
if (error)
return (error);
if (nvp != NULL) {
*npp = VTONFS(nvp);
return (0);
}
return (EINVAL);
}
if (ncl_fileid_maxwarnings >= 0 &&
ncl_fileid_nwarnings >= ncl_fileid_maxwarnings)
return;
off = 0;
if (ncl_fileid_maxwarnings >= 0) {
if (++ncl_fileid_nwarnings >= ncl_fileid_maxwarnings)
off = 1;
}
printf("newnfs: server '%s' error: fileid changed. "
"fsid %jx:%jx: expected fileid %#jx, got %#jx. "
"(BROKEN NFS SERVER OR MIDDLEWARE)\n",
nmp->nm_com.nmcom_hostname,
(uintmax_t)nmp->nm_fsid[0],
(uintmax_t)nmp->nm_fsid[1],
(uintmax_t)oldnap->na_fileid,
(uintmax_t)newnap->na_fileid);
if (off)
printf("newnfs: Logged %d times about fileid corruption; "
"going quiet to avoid spamming logs excessively. (Limit "
"is: %d).\n", ncl_fileid_nwarnings,
ncl_fileid_maxwarnings);
}
/*
* Load the attribute cache (that lives in the nfsnode entry) with
* the attributes of the second argument and
* Iff vaper not NULL
* copy the attributes to *vaper
* Similar to nfs_loadattrcache(), except the attributes are passed in
* instead of being parsed out of the mbuf list.
*/
int
nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper,
void *stuff, int writeattr, int dontshrink)
{
struct vnode *vp = *vpp;
struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper;
struct nfsnode *np;
struct nfsmount *nmp;
struct timespec mtime_save;
u_quad_t nsize;
int setnsize, error, force_fid_err;
error = 0;
setnsize = 0;
nsize = 0;
/*
* 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);
NFSLOCKNODE(np);
if (vp->v_type != nvap->va_type) {
vp->v_type = nvap->va_type;
if (vp->v_type == VFIFO)
vp->v_op = &newnfs_fifoops;
np->n_mtime = nvap->va_mtime;
}
nmp = VFSTONFS(vp->v_mount);
vap = &np->n_vattr.na_vattr;
mtime_save = vap->va_mtime;
if (writeattr) {
np->n_vattr.na_filerev = nap->na_filerev;
np->n_vattr.na_size = nap->na_size;
np->n_vattr.na_mtime = nap->na_mtime;
np->n_vattr.na_ctime = nap->na_ctime;
np->n_vattr.na_fsid = nap->na_fsid;
np->n_vattr.na_mode = nap->na_mode;
} else {
force_fid_err = 0;
KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning,
force_fid_err);
/*
* BROKEN NFS SERVER OR MIDDLEWARE
*
* Certain NFS servers (certain old proprietary filers ca.
* 2006) or broken middleboxes (e.g. WAN accelerator products)
* will respond to GETATTR requests with results for a
* different fileid.
*
* The WAN accelerator we've observed not only serves stale
* cache results for a given file, it also occasionally serves
* results for wholly different files. This causes surprising
* problems; for example the cached size attribute of a file
* may truncate down and then back up, resulting in zero
* regions in file contents read by applications. We observed
* this reliably with Clang and .c files during parallel build.
* A pcap revealed packet fragmentation and GETATTR RPC
* responses with wholly wrong fileids.
*/
if ((np->n_vattr.na_fileid != 0 &&
np->n_vattr.na_fileid != nap->na_fileid) ||
force_fid_err) {
nfscl_warn_fileid(nmp, &np->n_vattr, nap);
error = EIDRM;
goto out;
}
NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr,
sizeof (struct nfsvattr));
}
/*
* For NFSv4, if the node's fsid is not equal to the mount point's
* fsid, return the low order 32bits of the node's fsid. This
* allows getcwd(3) to work. There is a chance that the fsid might
* be the same as a local fs, but since this is in an NFS mount
* point, I don't think that will cause any problems?
*/
if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) &&
(nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] ||
nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) {
/*
* va_fsid needs to be set to some value derived from
* np->n_vattr.na_filesid that is not equal
* vp->v_mount->mnt_stat.f_fsid[0], so that it changes
* from the value used for the top level server volume
* in the mounted subtree.
*/
if (vp->v_mount->mnt_stat.f_fsid.val[0] !=
(uint32_t)np->n_vattr.na_filesid[0])
vap->va_fsid = (uint32_t)np->n_vattr.na_filesid[0];
else
vap->va_fsid = (uint32_t)hash32_buf(
np->n_vattr.na_filesid, 2 * sizeof(uint64_t), 0);
} else
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
np->n_attrstamp = time_second;
if (vap->va_size != np->n_size) {
if (vap->va_type == VREG) {
if (dontshrink && vap->va_size < np->n_size) {
/*
* We've been told not to shrink the file;
* zero np->n_attrstamp to indicate that
* the attributes are stale.
*/
vap->va_size = np->n_size;
np->n_attrstamp = 0;
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
vnode_pager_setsize(vp, np->n_size);
} else if (np->n_flag & NMODIFIED) {
/*
* We've modified the file: Use the larger
* of our size, and the server's size.
*/
if (vap->va_size < np->n_size) {
vap->va_size = np->n_size;
} else {
np->n_size = vap->va_size;
np->n_flag |= NSIZECHANGED;
}
vnode_pager_setsize(vp, np->n_size);
} else if (vap->va_size < np->n_size) {
/*
* When shrinking the size, the call to
* vnode_pager_setsize() cannot be done
* with the mutex held, so delay it until
* after the mtx_unlock call.
*/
nsize = np->n_size = vap->va_size;
np->n_flag |= NSIZECHANGED;
setnsize = 1;
} else {
np->n_size = vap->va_size;
np->n_flag |= NSIZECHANGED;
vnode_pager_setsize(vp, np->n_size);
}
} else {
np->n_size = vap->va_size;
}
}
/*
* The following checks are added to prevent a race between (say)
* a READDIR+ and a WRITE.
* READDIR+, WRITE requests sent out.
* READDIR+ resp, WRITE resp received on client.
* However, the WRITE resp was handled before the READDIR+ resp
* causing the post op attrs from the write to be loaded first
* and the attrs from the READDIR+ to be loaded later. If this
* happens, we have stale attrs loaded into the attrcache.
* We detect this by for the mtime moving back. We invalidate the
* attrcache when this happens.
*/
if (timespeccmp(&mtime_save, &vap->va_mtime, >)) {
/* Size changed or mtime went backwards */
np->n_attrstamp = 0;
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
}
if (vaper != NULL) {
NFSBCOPY((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;
}
}
out:
#ifdef KDTRACE_HOOKS
if (np->n_attrstamp != 0)
KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error);
#endif
NFSUNLOCKNODE(np);
if (setnsize)
vnode_pager_setsize(vp, nsize);
return (error);
}
/*
* Fill in the client id name. For these bytes:
* 1 - they must be unique
* 2 - they should be persistent across client reboots
* 1 is more critical than 2
* Use the mount point's unique id plus either the uuid or, if that
* isn't set, random junk.
*/
void
nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen)
{
int uuidlen;
/*
* First, put in the 64bit mount point identifier.
*/
if (idlen >= sizeof (u_int64_t)) {
NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t));
cp += sizeof (u_int64_t);
idlen -= sizeof (u_int64_t);
}
/*
* If uuid is non-zero length, use it.
*/
uuidlen = strlen(uuid);
if (uuidlen > 0 && idlen >= uuidlen) {
NFSBCOPY(uuid, cp, uuidlen);
cp += uuidlen;
idlen -= uuidlen;
}
/*
* This only normally happens if the uuid isn't set.
*/
while (idlen > 0) {
*cp++ = (u_int8_t)(arc4random() % 256);
idlen--;
}
}
/*
* Fill in a lock owner name. For now, pid + the process's creation time.
*/
void
nfscl_filllockowner(void *id, u_int8_t *cp, int flags)
{
union {
u_int32_t lval;
u_int8_t cval[4];
} tl;
struct proc *p;
/*
* Find the parent process for the thread passed in as an argument.
* If none exists, return NULL, otherwise return a thread for the parent.
* (Can be any of the threads, since it is only used for td->td_proc.)
*/
NFSPROC_T *
nfscl_getparent(struct thread *td)
{
struct proc *p;
struct thread *ptd;
if (td == NULL)
return (NULL);
p = td->td_proc;
if (p->p_pid == 0)
return (NULL);
p = p->p_pptr;
if (p == NULL)
return (NULL);
ptd = TAILQ_FIRST(&p->p_threads);
return (ptd);
}
/*
* Start up the renew kernel thread.
*/
static void
start_nfscl(void *arg)
{
struct nfsclclient *clp;
struct thread *td;
/*
* Handle wcc_data.
* For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr
* as the first Op after PutFH.
* (For NFSv4, the postop attributes are after the Op, so they can't be
* parsed here. A separate call to nfscl_postop_attr() is required.)
*/
int
nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp,
struct nfsvattr *nap, int *flagp, int *wccflagp, void *stuff)
{
u_int32_t *tl;
struct nfsnode *np = VTONFS(vp);
struct nfsvattr nfsva;
int error = 0;
/*
* Get postop attributes.
*/
int
nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp,
void *stuff)
{
u_int32_t *tl;
int error = 0;
*retp = 0;
if (nd->nd_flag & ND_NOMOREDATA)
return (error);
if (nd->nd_flag & ND_NFSV3) {
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
*retp = fxdr_unsigned(int, *tl);
} else if (nd->nd_flag & ND_NFSV4) {
/*
* For NFSv4, the postop attr are at the end, so no point
* in looking if nd_repstat != 0.
*/
if (!nd->nd_repstat) {
NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
if (*(tl + 1))
/* should never happen since nd_repstat != 0 */
nd->nd_flag |= ND_NOMOREDATA;
else
*retp = 1;
}
} else if (!nd->nd_repstat) {
/* For NFSv2, the attributes are here iff nd_repstat == 0 */
*retp = 1;
}
if (*retp) {
error = nfsm_loadattr(nd, nap);
if (error)
*retp = 0;
}
nfsmout:
return (error);
}
/*
* Fill in the setable attributes. The full argument indicates whether
* to fill in them all or just mode and time.
*/
void
nfscl_fillsattr(struct nfsrv_descript *nd, struct vattr *vap,
struct vnode *vp, int flags, u_int32_t rdev)
{
u_int32_t *tl;
struct nfsv2_sattr *sp;
nfsattrbit_t attrbits;
/*
* nfscl_request() - mostly a wrapper for newnfs_request().
*/
int
nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p,
struct ucred *cred, void *stuff)
{
int ret, vers;
struct nfsmount *nmp;
nmp = VFSTONFS(vp->v_mount);
if (nd->nd_flag & ND_NFSV4)
vers = NFS_VER4;
else if (nd->nd_flag & ND_NFSV3)
vers = NFS_VER3;
else
vers = NFS_VER2;
ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred,
NFS_PROG, vers, NULL, 1, NULL, NULL);
return (ret);
}
/*
* fill in this bsden's variant of statfs using nfsstatfs.
*/
void
nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs)
{
struct statfs *sbp = (struct statfs *)statfs;
if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) {
sbp->f_bsize = NFS_FABLKSIZE;
sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE;
sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE;
/*
* Although sf_abytes is uint64_t and f_bavail is int64_t,
* the value after dividing by NFS_FABLKSIZE is small
* enough that it will fit in 63bits, so it is ok to
* assign it to f_bavail without fear that it will become
* negative.
*/
sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE;
sbp->f_files = sfp->sf_tfiles;
/* Since f_ffree is int64_t, clip it to 63bits. */
if (sfp->sf_ffiles > INT64_MAX)
sbp->f_ffree = INT64_MAX;
else
sbp->f_ffree = sfp->sf_ffiles;
} else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) {
/*
* The type casts to (int32_t) ensure that this code is
* compatible with the old NFS client, in that it will
* propagate bit31 to the high order bits. This may or may
* not be correct for NFSv2, but since it is a legacy
* environment, I'd rather retain backwards compatibility.
*/
sbp->f_bsize = (int32_t)sfp->sf_bsize;
sbp->f_blocks = (int32_t)sfp->sf_blocks;
sbp->f_bfree = (int32_t)sfp->sf_bfree;
sbp->f_bavail = (int32_t)sfp->sf_bavail;
sbp->f_files = 0;
sbp->f_ffree = 0;
}
}
/*
* Use the fsinfo stuff to update the mount point.
*/
void
nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp)
{
/*
* Lookups source address which should be used to communicate with
* @nmp and stores it inside @pdst.
*
* Returns 0 on success.
*/
u_int8_t *
nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p)
{
#if defined(INET6) || defined(INET)
int error, fibnum;
/*
* Check each of the attributes to be set, to ensure they aren't already
* the correct value. Disable setting ones already correct.
*/
int
nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap)
{
if (vap->va_mode != (mode_t)VNOVAL) {
if (vap->va_mode == nvap->na_mode)
vap->va_mode = (mode_t)VNOVAL;
}
if (vap->va_uid != (uid_t)VNOVAL) {
if (vap->va_uid == nvap->na_uid)
vap->va_uid = (uid_t)VNOVAL;
}
if (vap->va_gid != (gid_t)VNOVAL) {
if (vap->va_gid == nvap->na_gid)
vap->va_gid = (gid_t)VNOVAL;
}
if (vap->va_size != VNOVAL) {
if (vap->va_size == nvap->na_size)
vap->va_size = VNOVAL;
}
/*
* We are normally called with only a partially initialized
* VAP. Since the NFSv3 spec says that server may use the
* file attributes to store the verifier, the spec requires
* us to do a SETATTR RPC. FreeBSD servers store the verifier
* in atime, but we can't really assume that all servers will
* so we ensure that our SETATTR sets both atime and mtime.
* Set the VA_UTIMES_NULL flag for this case, so that
* the server's time will be used. This is needed to
* work around a bug in some Solaris servers, where
* setting the time TOCLIENT causes the Setattr RPC
* to return NFS_OK, but not set va_mode.
*/
if (vap->va_mtime.tv_sec == VNOVAL) {
vfs_timestamp(&vap->va_mtime);
vap->va_vaflags |= VA_UTIMES_NULL;
}
if (vap->va_atime.tv_sec == VNOVAL)
vap->va_atime = vap->va_mtime;
return (1);
}
/*
* Map nfsv4 errors to errno.h errors.
* The uid and gid arguments are only used for NFSERR_BADOWNER and that
* error should only be returned for the Open, Create and Setattr Ops.
* As such, most calls can just pass in 0 for those arguments.
*/
APPLESTATIC int
nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid)
{
struct proc *p;
if (error < 10000)
return (error);
if (td != NULL)
p = td->td_proc;
else
p = NULL;
switch (error) {
case NFSERR_BADOWNER:
tprintf(p, LOG_INFO,
"No name and/or group mapping for uid,gid:(%d,%d)\n",
uid, gid);
return (EPERM);
case NFSERR_BADNAME:
case NFSERR_BADCHAR:
printf("nfsv4 char/name not handled by server\n");
return (ENOENT);
case NFSERR_STALECLIENTID:
case NFSERR_STALESTATEID:
case NFSERR_EXPIRED:
case NFSERR_BADSTATEID:
case NFSERR_BADSESSION:
printf("nfsv4 recover err returned %d\n", error);
return (EIO);
case NFSERR_BADHANDLE:
case NFSERR_SERVERFAULT:
case NFSERR_BADTYPE:
case NFSERR_FHEXPIRED:
case NFSERR_RESOURCE:
case NFSERR_MOVED:
case NFSERR_NOFILEHANDLE:
case NFSERR_MINORVERMISMATCH:
case NFSERR_OLDSTATEID:
case NFSERR_BADSEQID:
case NFSERR_LEASEMOVED:
case NFSERR_RECLAIMBAD:
case NFSERR_BADXDR:
case NFSERR_OPILLEGAL:
printf("nfsv4 client/server protocol prob err=%d\n",
error);
return (EIO);
default:
tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error);
return (EIO);
};
}
/*
* Check to see if the process for this owner exists. Return 1 if it doesn't
* and 0 otherwise.
*/
int
nfscl_procdoesntexist(u_int8_t *own)
{
union {
u_int32_t lval;
u_int8_t cval[4];
} tl;
struct proc *p;
pid_t pid;
int ret = 0;
/*
* - nfs pseudo system call for the client
*/
/*
* MPSAFE
*/
static int
nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap)
{
struct file *fp;
struct nfscbd_args nfscbdarg;
struct nfsd_nfscbd_args nfscbdarg2;
struct nameidata nd;
struct nfscl_dumpmntopts dumpmntopts;
cap_rights_t rights;
char *buf;
int error;
if (uap->flag & NFSSVC_CBADDSOCK) {
error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg));
if (error)
return (error);
/*
* Since we don't know what rights might be required,
* pretend that we need them all. It is better to be too
* careful than too reckless.
*/
error = fget(td, nfscbdarg.sock,
cap_rights_init(&rights, CAP_SOCK_CLIENT), &fp);
if (error)
return (error);
if (fp->f_type != DTYPE_SOCKET) {
fdrop(fp, td);
return (EPERM);
}
error = nfscbd_addsock(fp);
fdrop(fp, td);
if (!error && nfscl_enablecallb == 0) {
nfsv4_cbport = nfscbdarg.port;
nfscl_enablecallb = 1;
}
} else if (uap->flag & NFSSVC_NFSCBD) {
if (uap->argp == NULL)
return (EINVAL);
error = copyin(uap->argp, (caddr_t)&nfscbdarg2,
sizeof(nfscbdarg2));
if (error)
return (error);
error = nfscbd_nfsd(td, &nfscbdarg2);
} else if (uap->flag & NFSSVC_DUMPMNTOPTS) {
error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts));
if (error == 0 && (dumpmntopts.ndmnt_blen < 256 ||
dumpmntopts.ndmnt_blen > 1024))
error = EINVAL;
if (error == 0)
error = nfsrv_lookupfilename(&nd,
dumpmntopts.ndmnt_fname, td);
if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name,
"nfs") != 0) {
vput(nd.ni_vp);
error = EINVAL;
}
if (error == 0) {
buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK);
nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf,
dumpmntopts.ndmnt_blen);
vput(nd.ni_vp);
error = copyout(buf, dumpmntopts.ndmnt_buf,
dumpmntopts.ndmnt_blen);
free(buf, M_TEMP);
}
} else {
error = EINVAL;
}
return (error);
}
extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *);
/*
* Called once to initialize data structures...
*/
static int
nfscl_modevent(module_t mod, int type, void *data)
{
int error = 0;
static int loaded = 0;
