/*
* Return root of a filesystem
*/
static int
nfs_root(struct mount *mp, int flags, struct vnode **vpp)
{
struct vnode *vp;
struct nfsmount *nmp;
struct nfsnode *np;
int error;
nmp = VFSTONFS(mp);
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, flags);
if (error)
return error;
vp = NFSTOV(np);
/*
* Get transfer parameters and attributes for root vnode once.
*/
mtx_lock(&nmp->nm_mtx);
if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0 &&
(nmp->nm_flag & NFSMNT_NFSV3)) {
mtx_unlock(&nmp->nm_mtx);
nfs_fsinfo(nmp, vp, curthread->td_ucred, curthread);
} else
mtx_unlock(&nmp->nm_mtx);
if (vp->v_type == VNON)
vp->v_type = VDIR;
vp->v_vflag |= VV_ROOT;
*vpp = vp;
return (0);
}
static int
nfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
{
struct vnode *vp;
struct nfs_statfs *sfp;
struct nfsmount *nmp = VFSTONFS(mp);
thread_t td = curthread;
int error = 0, retattr;
struct nfsnode *np;
struct nfsm_info info;
info.mrep = NULL;
info.v3 = (nmp->nm_flag & NFSMNT_NFSV3);
lwkt_gettoken(&nmp->nm_token);
#ifndef nolint
sfp = NULL;
#endif
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, NULL);
if (error) {
lwkt_reltoken(&nmp->nm_token);
return (error);
}
vp = NFSTOV(np);
/* ignore the passed cred */
cred = crget();
cred->cr_ngroups = 1;
if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
(void)nfs_fsinfo(nmp, vp, td);
nfsstats.rpccnt[NFSPROC_FSSTAT]++;
nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3));
ERROROUT(nfsm_fhtom(&info, vp));
NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error));
if (info.v3) {
ERROROUT(nfsm_postop_attr(&info, vp, &retattr,
NFS_LATTR_NOSHRINK));
}
if (error) {
if (info.mrep != NULL)
m_freem(info.mrep);
goto nfsmout;
}
NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3)));
sbp->f_flag = nmp->nm_flag;
sbp->f_owner = nmp->nm_cred->cr_ruid;
if (info.v3) {
sbp->f_bsize = NFS_FABLKSIZE;
sbp->f_frsize = NFS_FABLKSIZE;
sbp->f_blocks = (fxdr_hyper(&sfp->sf_tbytes) /
((u_quad_t)NFS_FABLKSIZE));
sbp->f_bfree = (fxdr_hyper(&sfp->sf_fbytes) /
((u_quad_t)NFS_FABLKSIZE));
sbp->f_bavail = (fxdr_hyper(&sfp->sf_abytes) /
((u_quad_t)NFS_FABLKSIZE));
sbp->f_files = fxdr_hyper(&sfp->sf_tfiles);
sbp->f_ffree = fxdr_hyper(&sfp->sf_ffiles);
sbp->f_favail = fxdr_hyper(&sfp->sf_afiles);
} else {
sbp->f_bsize = 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_files = 0;
sbp->f_ffree = 0;
sbp->f_favail = 0;
}
sbp->f_syncreads = 0;
sbp->f_syncwrites = 0;
sbp->f_asyncreads = 0;
sbp->f_asyncwrites = 0;
sbp->f_type = mp->mnt_vfc->vfc_typenum;
m_freem(info.mrep);
info.mrep = NULL;
nfsmout:
vput(vp);
crfree(cred);
lwkt_reltoken(&nmp->nm_token);
return (error);
}
/*
* nfs statfs call
*/
int
nfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
{
struct vnode *vp;
struct nfs_statfs *sfp;
struct nfsmount *nmp = VFSTONFS(mp);
thread_t td = curthread;
int error = 0, retattr;
struct nfsnode *np;
u_quad_t tquad;
struct nfsm_info info;
info.mrep = NULL;
info.v3 = (nmp->nm_flag & NFSMNT_NFSV3);
lwkt_gettoken(&nmp->nm_token);
#ifndef nolint
sfp = NULL;
#endif
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, NULL);
if (error) {
lwkt_reltoken(&nmp->nm_token);
return (error);
}
vp = NFSTOV(np);
/* ignore the passed cred */
cred = crget();
cred->cr_ngroups = 1;
if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0)
(void)nfs_fsinfo(nmp, vp, td);
nfsstats.rpccnt[NFSPROC_FSSTAT]++;
nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3));
ERROROUT(nfsm_fhtom(&info, vp));
NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error));
if (info.v3) {
ERROROUT(nfsm_postop_attr(&info, vp, &retattr,
NFS_LATTR_NOSHRINK));
}
if (error) {
if (info.mrep != NULL)
m_freem(info.mrep);
goto nfsmout;
}
NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3)));
sbp->f_flags = nmp->nm_flag;
if (info.v3) {
sbp->f_bsize = NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp->sf_tbytes);
sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
tquad = fxdr_hyper(&sfp->sf_fbytes);
sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
tquad = fxdr_hyper(&sfp->sf_abytes);
sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
sbp->f_files = (fxdr_unsigned(int32_t,
sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff);
sbp->f_ffree = (fxdr_unsigned(int32_t,
sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff);
} else {
sbp->f_bsize = 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_files = 0;
sbp->f_ffree = 0;
}
/*
* Some values are pre-set in mnt_stat. Note in particular f_iosize
* cannot be changed once the filesystem is mounted as it is used
* as the basis for BIOs.
*/
if (sbp != &mp->mnt_stat) {
sbp->f_type = mp->mnt_vfc->vfc_typenum;
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
sbp->f_iosize = mp->mnt_stat.f_iosize;
}
m_freem(info.mrep);
info.mrep = NULL;
nfsmout:
vput(vp);
crfree(cred);
lwkt_reltoken(&nmp->nm_token);
return (error);
}
/*
* nfs statfs call
*/
static int
nfs_statfs(struct mount *mp, struct statfs *sbp)
{
struct vnode *vp;
struct thread *td;
struct nfs_statfs *sfp;
caddr_t bpos, dpos;
struct nfsmount *nmp = VFSTONFS(mp);
int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr;
struct mbuf *mreq, *mrep, *md, *mb;
struct nfsnode *np;
u_quad_t tquad;
td = curthread;
#ifndef nolint
sfp = NULL;
#endif
error = vfs_busy(mp, MBF_NOWAIT);
if (error)
return (error);
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE);
if (error) {
vfs_unbusy(mp);
return (error);
}
vp = NFSTOV(np);
mtx_lock(&nmp->nm_mtx);
if (v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) {
mtx_unlock(&nmp->nm_mtx);
(void)nfs_fsinfo(nmp, vp, td->td_ucred, td);
} else
mtx_unlock(&nmp->nm_mtx);
nfsstats.rpccnt[NFSPROC_FSSTAT]++;
mreq = nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3));
mb = mreq;
bpos = mtod(mb, caddr_t);
nfsm_fhtom(vp, v3);
nfsm_request(vp, NFSPROC_FSSTAT, td, td->td_ucred);
if (v3)
nfsm_postop_attr(vp, retattr);
if (error) {
if (mrep != NULL)
m_freem(mrep);
goto nfsmout;
}
sfp = nfsm_dissect(struct nfs_statfs *, NFSX_STATFS(v3));
mtx_lock(&nmp->nm_mtx);
sbp->f_iosize = nfs_iosize(nmp);
mtx_unlock(&nmp->nm_mtx);
if (v3) {
sbp->f_bsize = NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp->sf_tbytes);
sbp->f_blocks = tquad / NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp->sf_fbytes);
sbp->f_bfree = tquad / NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp->sf_abytes);
sbp->f_bavail = tquad / NFS_FABLKSIZE;
sbp->f_files = (fxdr_unsigned(int32_t,
sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff);
sbp->f_ffree = (fxdr_unsigned(int32_t,
sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff);
} else {
sbp->f_bsize = 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_files = 0;
sbp->f_ffree = 0;
}
m_freem(mrep);
nfsmout:
vput(vp);
vfs_unbusy(mp);
return (error);
}
/*
* Common code for mount and mountroot
*/
static int
mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
char *hst, struct vnode **vpp, struct ucred *cred, int nametimeo,
int negnametimeo)
{
struct nfsmount *nmp;
struct nfsnode *np;
int error;
struct vattr attrs;
if (mp->mnt_flag & MNT_UPDATE) {
nmp = VFSTONFS(mp);
printf("%s: MNT_UPDATE is no longer handled here\n", __func__);
free(nam, M_SONAME);
return (0);
} else {
nmp = uma_zalloc(nfsmount_zone, M_WAITOK);
bzero((caddr_t)nmp, sizeof (struct nfsmount));
TAILQ_INIT(&nmp->nm_bufq);
mp->mnt_data = nmp;
nmp->nm_getinfo = nfs_getnlminfo;
nmp->nm_vinvalbuf = nfs_vinvalbuf;
}
vfs_getnewfsid(mp);
nmp->nm_mountp = mp;
mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF);
/*
* V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too
* high, depending on whether we end up with negative offsets in
* the client or server somewhere. 2GB-1 may be safer.
*
* For V3, nfs_fsinfo will adjust this as necessary. Assume maximum
* that we can handle until we find out otherwise.
*/
if ((argp->flags & NFSMNT_NFSV3) == 0)
nmp->nm_maxfilesize = 0xffffffffLL;
else
nmp->nm_maxfilesize = OFF_MAX;
nmp->nm_timeo = NFS_TIMEO;
nmp->nm_retry = NFS_RETRANS;
if ((argp->flags & NFSMNT_NFSV3) && argp->sotype == SOCK_STREAM) {
nmp->nm_wsize = nmp->nm_rsize = NFS_MAXDATA;
} else {
nmp->nm_wsize = NFS_WSIZE;
nmp->nm_rsize = NFS_RSIZE;
}
nmp->nm_wcommitsize = hibufspace / (desiredvnodes / 1000);
nmp->nm_readdirsize = NFS_READDIRSIZE;
nmp->nm_numgrps = NFS_MAXGRPS;
nmp->nm_readahead = NFS_DEFRAHEAD;
nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
nmp->nm_nametimeo = nametimeo;
nmp->nm_negnametimeo = negnametimeo;
nmp->nm_tprintf_delay = nfs_tprintf_delay;
if (nmp->nm_tprintf_delay < 0)
nmp->nm_tprintf_delay = 0;
nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay;
if (nmp->nm_tprintf_initial_delay < 0)
nmp->nm_tprintf_initial_delay = 0;
nmp->nm_fhsize = argp->fhsize;
bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
nmp->nm_nam = nam;
/* Set up the sockets and per-host congestion */
nmp->nm_sotype = argp->sotype;
nmp->nm_soproto = argp->proto;
nmp->nm_rpcops = &nfs_rpcops;
nfs_decode_args(mp, nmp, argp, hst);
/*
* For Connection based sockets (TCP,...) defer the connect until
* the first request, in case the server is not responding.
*/
if (nmp->nm_sotype == SOCK_DGRAM &&
(error = nfs_connect(nmp)))
goto bad;
/*
* This is silly, but it has to be set so that vinifod() works.
* We do not want to do an nfs_statfs() here since we can get
* stuck on a dead server and we are holding a lock on the mount
* point.
*/
mtx_lock(&nmp->nm_mtx);
mp->mnt_stat.f_iosize = nfs_iosize(nmp);
mtx_unlock(&nmp->nm_mtx);
/*
* A reference count is needed on the nfsnode representing the
* remote root. If this object is not persistent, then backward
* traversals of the mount point (i.e. "..") will not work if
* the nfsnode gets flushed out of the cache. Ufs does not have
* this problem, because one can identify root inodes by their
* number == ROOTINO (2).
*/
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE);
if (error)
goto bad;
*vpp = NFSTOV(np);
/*
* Get file attributes and transfer parameters for the
* mountpoint. This has the side effect of filling in
* (*vpp)->v_type with the correct value.
*/
if (argp->flags & NFSMNT_NFSV3)
nfs_fsinfo(nmp, *vpp, curthread->td_ucred, curthread);
else
VOP_GETATTR(*vpp, &attrs, curthread->td_ucred);
/*
* Lose the lock but keep the ref.
*/
VOP_UNLOCK(*vpp, 0);
return (0);
bad:
nfs_disconnect(nmp);
mtx_destroy(&nmp->nm_mtx);
uma_zfree(nfsmount_zone, nmp);
free(nam, M_SONAME);
return (error);
}
