/*
* Unmount a file descriptor from a node in the file system.
* If the user is not the owner of the file and is not privileged,
* the request is denied.
* Otherwise, remove the namenode from the hash list.
* If the mounted file descriptor was that of a stream and this
* was the last mount of the stream, turn off the STRMOUNT flag.
* If the rootvp is referenced other than through the mount,
* nm_inactive will clean up.
*/
static int
nm_unmount(vfs_t *vfsp, int flag, cred_t *crp)
{
struct namenode *nodep = (struct namenode *)vfsp->vfs_data;
vnode_t *vp, *thisvp;
struct file *fp = NULL;
ASSERT((nodep->nm_flag & NMNMNT) == 0);
/*
* forced unmount is not supported by this file system
* and thus, ENOTSUP, is being returned.
*/
if (flag & MS_FORCE) {
return (ENOTSUP);
}
vp = nodep->nm_filevp;
mutex_enter(&nodep->nm_lock);
if (secpolicy_vnode_owner(crp, nodep->nm_vattr.va_uid) != 0) {
mutex_exit(&nodep->nm_lock);
return (EPERM);
}
mutex_exit(&nodep->nm_lock);
mutex_enter(&ntable_lock);
nameremove(nodep);
thisvp = NMTOV(nodep);
mutex_enter(&thisvp->v_lock);
if (thisvp->v_count-- == 1) {
fp = nodep->nm_filep;
mutex_exit(&thisvp->v_lock);
vn_invalid(thisvp);
vn_free(thisvp);
VFS_RELE(vfsp);
namenodeno_free(nodep->nm_vattr.va_nodeid);
kmem_free(nodep, sizeof (struct namenode));
} else {
thisvp->v_flag &= ~VROOT;
mutex_exit(&thisvp->v_lock);
}
if (namefind(vp, NULLVP) == NULL && vp->v_stream) {
struct stdata *stp = vp->v_stream;
mutex_enter(&stp->sd_lock);
stp->sd_flag &= ~STRMOUNT;
mutex_exit(&stp->sd_lock);
}
mutex_exit(&ntable_lock);
if (fp != NULL)
(void) closef(fp);
return (0);
}
/* ARGSUSED */
static void
fdinactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
{
mutex_enter(&vp->v_lock);
ASSERT(vp->v_count >= 1);
if (--vp->v_count != 0) {
mutex_exit(&vp->v_lock);
return;
}
mutex_exit(&vp->v_lock);
vn_invalid(vp);
vn_free(vp);
}
void
sv_inactive(vnode_t *vp)
{
svnode_t *svp;
rnode4_t *rp;
vnode_t *mvp;
sv_stats.sv_inactive++;
svp = VTOSV(vp);
rp = VTOR4(vp);
mvp = rp->r_vnode;
ASSERT(mvp != vp);
/*
* Remove the shadow vnode from the list. The serialization
* is provided by the svnode list lock. This could be done
* with the r_statelock, but that would require more locking
* in the activation path.
*/
mutex_enter(&rp->r_svlock);
mutex_enter(&vp->v_lock);
/* check if someone slipped in while locks were dropped */
if (vp->v_count > 1) {
vp->v_count--;
mutex_exit(&vp->v_lock);
mutex_exit(&rp->r_svlock);
return;
}
remque(svp);
mutex_exit(&vp->v_lock);
mutex_exit(&rp->r_svlock);
sv_uninit(svp);
svp->sv_forw = svp->sv_back = NULL;
kmem_cache_free(svnode_cache, svp);
vn_invalid(vp);
vn_free(vp);
/* release the reference held by this shadow on the master */
VN_RELE(mvp);
}
static void
fnode_destructor(void *buf, void *cdrarg)
{
fifodata_t *fdp = buf;
fifolock_t *flp = &fdp->fifo_lock;
fifonode_t *fnp = &fdp->fifo_fnode[0];
size_t size = (uintptr_t)cdrarg;
mutex_destroy(&flp->flk_lock);
cv_destroy(&flp->flk_wait_cv);
ASSERT(flp->flk_ocsync == 0);
while ((char *)fnp < (char *)buf + size) {
vnode_t *vp = FTOV(fnp);
if (vp == NULL) {
return; /* constructor failed here */
}
ASSERT(fnp->fn_mp == NULL);
ASSERT(fnp->fn_count == 0);
ASSERT(fnp->fn_lock == flp);
ASSERT(fnp->fn_open == 0);
ASSERT(fnp->fn_insync == 0);
ASSERT(fnp->fn_rsynccnt == 0 && fnp->fn_wsynccnt == 0);
ASSERT(fnp->fn_wwaitcnt == 0);
ASSERT(fnp->fn_pcredp == NULL);
ASSERT(vn_matchops(vp, fifo_vnodeops));
ASSERT(vp->v_stream == NULL);
ASSERT(vp->v_type == VFIFO);
ASSERT(vp->v_data == (caddr_t)fnp);
ASSERT((vp->v_flag & (VNOMAP|VNOSWAP)) == (VNOMAP|VNOSWAP));
cv_destroy(&fnp->fn_wait_cv);
vn_invalid(vp);
vn_free(vp);
fnp++;
}
}
/*
* This routine destroys all the resources of an rnode
* and finally the rnode itself.
*/
static void
destroy_rnode4(rnode4_t *rp)
{
vnode_t *vp;
vfs_t *vfsp;
ASSERT(rp->r_deleg_type == OPEN_DELEGATE_NONE);
vp = RTOV4(rp);
vfsp = vp->v_vfsp;
uninit_rnode4(rp);
atomic_add_long((ulong_t *)&rnode4_new, -1);
#ifdef DEBUG
clstat4_debug.nrnode.value.ui64--;
#endif
kmem_cache_free(rnode4_cache, rp);
vn_invalid(vp);
vn_free(vp);
VFS_RELE(vfsp);
}
/* ARGSUSED */
static void
nm_inactive(vnode_t *vp, cred_t *crp, caller_context_t *ct)
{
struct namenode *nodep = VTONM(vp);
vfs_t *vfsp = vp->v_vfsp;
mutex_enter(&vp->v_lock);
ASSERT(vp->v_count >= 1);
if (--vp->v_count != 0) {
mutex_exit(&vp->v_lock);
return;
}
mutex_exit(&vp->v_lock);
if (!(nodep->nm_flag & NMNMNT)) {
ASSERT(nodep->nm_filep->f_vnode == nodep->nm_filevp);
(void) closef(nodep->nm_filep);
}
vn_invalid(vp);
vn_free(vp);
if (vfsp != &namevfs)
VFS_RELE(vfsp);
namenodeno_free(nodep->nm_vattr.va_nodeid);
kmem_free(nodep, sizeof (struct namenode));
}
void
pc_rele(struct pcnode *pcp)
{
struct pcfs *fsp;
struct vnode *vp;
int err;
vp = PCTOV(pcp);
PC_DPRINTF1(8, "pc_rele vp=0x%p\n", (void *)vp);
fsp = VFSTOPCFS(vp->v_vfsp);
ASSERT(fsp->pcfs_flags & PCFS_LOCKED);
rw_enter(&pcnodes_lock, RW_WRITER);
pcp->pc_flags |= PC_RELEHOLD;
retry:
if (vp->v_type != VDIR && (pcp->pc_flags & PC_INVAL) == 0) {
/*
* If the file was removed while active it may be safely
* truncated now.
*/
if (pcp->pc_entry.pcd_filename[0] == PCD_ERASED) {
(void) pc_truncate(pcp, 0);
} else if (pcp->pc_flags & PC_CHG) {
(void) pc_nodeupdate(pcp);
}
err = syncpcp(pcp, B_INVAL);
if (err) {
(void) syncpcp(pcp, B_INVAL | B_FORCE);
}
}
if (vn_has_cached_data(vp)) {
/*
* pvn_vplist_dirty will abort all old pages
*/
(void) pvn_vplist_dirty(vp, (u_offset_t)0,
pcfs_putapage, B_INVAL, (struct cred *)NULL);
}
(void) pc_syncfat(fsp);
mutex_enter(&vp->v_lock);
if (vn_has_cached_data(vp)) {
mutex_exit(&vp->v_lock);
goto retry;
}
ASSERT(!vn_has_cached_data(vp));
vp->v_count--; /* release our hold from vn_rele */
if (vp->v_count > 0) { /* Is this check still needed? */
PC_DPRINTF1(3, "pc_rele: pcp=0x%p HELD AGAIN!\n", (void *)pcp);
mutex_exit(&vp->v_lock);
pcp->pc_flags &= ~PC_RELEHOLD;
rw_exit(&pcnodes_lock);
return;
}
remque(pcp);
rw_exit(&pcnodes_lock);
/*
* XXX - old code had a check for !(pcp->pc_flags & PC_INVAL)
* here. Seems superfluous/incorrect, but then earlier on PC_INVAL
* was never set anywhere in PCFS. Now it is, and we _have_ to drop
* the file reference here. Else, we'd screw up umount/modunload.
*/
if ((vp->v_type == VREG)) {
fsp->pcfs_frefs--;
}
fsp->pcfs_nrefs--;
VFS_RELE(vp->v_vfsp);
if (fsp->pcfs_nrefs < 0) {
panic("pc_rele: nrefs count");
}
if (fsp->pcfs_frefs < 0) {
panic("pc_rele: frefs count");
}
mutex_exit(&vp->v_lock);
vn_invalid(vp);
vn_free(vp);
kmem_free(pcp, sizeof (struct pcnode));
}
/*
* Remove a lnode from the table
*/
void
freelonode(lnode_t *lp)
{
lnode_t *lt;
lnode_t *ltprev = NULL;
struct lfsnode *lfs, *nextlfs;
struct vfs *vfsp;
struct vnode *vp = ltov(lp);
struct vnode *realvp = realvp(vp);
struct loinfo *li = vtoli(vp->v_vfsp);
#ifdef LODEBUG
lo_dprint(4, "freelonode lp %p hash %d\n",
lp, ltablehash(lp->lo_vp, li));
#endif
TABLE_LOCK_ENTER(lp->lo_vp, li);
mutex_enter(&vp->v_lock);
if (vp->v_count > 1) {
vp->v_count--; /* release our hold from vn_rele */
mutex_exit(&vp->v_lock);
TABLE_LOCK_EXIT(lp->lo_vp, li);
return;
}
mutex_exit(&vp->v_lock);
for (lt = TABLE_BUCKET(lp->lo_vp, li); lt != NULL;
ltprev = lt, lt = lt->lo_next) {
if (lt == lp) {
#ifdef LODEBUG
lo_dprint(4, "freeing %p, vfsp %p\n",
vp, vp->v_vfsp);
#endif
atomic_dec_32(&li->li_refct);
vfsp = vp->v_vfsp;
vn_invalid(vp);
if (vfsp != li->li_mountvfs) {
mutex_enter(&li->li_lfslock);
/*
* Check for unused lfs
*/
lfs = li->li_lfs;
while (lfs != NULL) {
nextlfs = lfs->lfs_next;
if (vfsp == &lfs->lfs_vfs) {
lfs_rele(lfs, li);
break;
}
if (lfs->lfs_vfs.vfs_count == 1) {
/*
* Lfs is idle
*/
freelfsnode(lfs, li);
}
lfs = nextlfs;
}
mutex_exit(&li->li_lfslock);
}
if (ltprev == NULL) {
TABLE_BUCKET(lt->lo_vp, li) = lt->lo_next;
} else {
ltprev->lo_next = lt->lo_next;
}
TABLE_COUNT(lt->lo_vp, li)--;
TABLE_LOCK_EXIT(lt->lo_vp, li);
kmem_cache_free(lnode_cache, lt);
vn_free(vp);
VN_RELE(realvp);
return;
}
}
panic("freelonode");
/*NOTREACHED*/
}
static vnode_t *
make_rnode4(nfs4_sharedfh_t *fh, r4hashq_t *rhtp, struct vfs *vfsp,
struct vnodeops *vops,
int (*putapage)(vnode_t *, page_t *, u_offset_t *, size_t *, int, cred_t *),
int *newnode, cred_t *cr)
{
rnode4_t *rp;
rnode4_t *trp;
vnode_t *vp;
mntinfo4_t *mi;
ASSERT(RW_READ_HELD(&rhtp->r_lock));
mi = VFTOMI4(vfsp);
start:
if ((rp = r4find(rhtp, fh, vfsp)) != NULL) {
vp = RTOV4(rp);
*newnode = 0;
return (vp);
}
rw_exit(&rhtp->r_lock);
mutex_enter(&rp4freelist_lock);
if (rp4freelist != NULL && rnode4_new >= nrnode) {
rp = rp4freelist;
rp4_rmfree(rp);
mutex_exit(&rp4freelist_lock);
vp = RTOV4(rp);
if (rp->r_flags & R4HASHED) {
rw_enter(&rp->r_hashq->r_lock, RW_WRITER);
mutex_enter(&vp->v_lock);
if (vp->v_count > 1) {
vp->v_count--;
mutex_exit(&vp->v_lock);
rw_exit(&rp->r_hashq->r_lock);
rw_enter(&rhtp->r_lock, RW_READER);
goto start;
}
mutex_exit(&vp->v_lock);
rp4_rmhash_locked(rp);
rw_exit(&rp->r_hashq->r_lock);
}
r4inactive(rp, cr);
mutex_enter(&vp->v_lock);
if (vp->v_count > 1) {
vp->v_count--;
mutex_exit(&vp->v_lock);
rw_enter(&rhtp->r_lock, RW_READER);
goto start;
}
mutex_exit(&vp->v_lock);
vn_invalid(vp);
/*
* destroy old locks before bzero'ing and
* recreating the locks below.
*/
uninit_rnode4(rp);
/*
* Make sure that if rnode is recycled then
* VFS count is decremented properly before
* reuse.
*/
VFS_RELE(vp->v_vfsp);
vn_reinit(vp);
} else {
vnode_t *new_vp;
mutex_exit(&rp4freelist_lock);
rp = kmem_cache_alloc(rnode4_cache, KM_SLEEP);
new_vp = vn_alloc(KM_SLEEP);
atomic_add_long((ulong_t *)&rnode4_new, 1);
#ifdef DEBUG
clstat4_debug.nrnode.value.ui64++;
#endif
vp = new_vp;
}
bzero(rp, sizeof (*rp));
rp->r_vnode = vp;
nfs_rw_init(&rp->r_rwlock, NULL, RW_DEFAULT, NULL);
nfs_rw_init(&rp->r_lkserlock, NULL, RW_DEFAULT, NULL);
mutex_init(&rp->r_svlock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&rp->r_statelock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&rp->r_statev4_lock, NULL, MUTEX_DEFAULT, NULL);
mutex_init(&rp->r_os_lock, NULL, MUTEX_DEFAULT, NULL);
rp->created_v4 = 0;
list_create(&rp->r_open_streams, sizeof (nfs4_open_stream_t),
offsetof(nfs4_open_stream_t, os_node));
rp->r_lo_head.lo_prev_rnode = &rp->r_lo_head;
rp->r_lo_head.lo_next_rnode = &rp->r_lo_head;
cv_init(&rp->r_cv, NULL, CV_DEFAULT, NULL);
cv_init(&rp->r_commit.c_cv, NULL, CV_DEFAULT, NULL);
rp->r_flags = R4READDIRWATTR;
rp->r_fh = fh;
rp->r_hashq = rhtp;
sfh4_hold(rp->r_fh);
rp->r_server = mi->mi_curr_serv;
rp->r_deleg_type = OPEN_DELEGATE_NONE;
rp->r_deleg_needs_recovery = OPEN_DELEGATE_NONE;
nfs_rw_init(&rp->r_deleg_recall_lock, NULL, RW_DEFAULT, NULL);
rddir4_cache_create(rp);
rp->r_putapage = putapage;
vn_setops(vp, vops);
vp->v_data = (caddr_t)rp;
vp->v_vfsp = vfsp;
VFS_HOLD(vfsp);
vp->v_type = VNON;
if (isrootfh(fh, rp))
vp->v_flag = VROOT;
vn_exists(vp);
/*
* There is a race condition if someone else
* alloc's the rnode while no locks are held, so we
* check again and recover if found.
*/
rw_enter(&rhtp->r_lock, RW_WRITER);
if ((trp = r4find(rhtp, fh, vfsp)) != NULL) {
vp = RTOV4(trp);
*newnode = 0;
rw_exit(&rhtp->r_lock);
rp4_addfree(rp, cr);
rw_enter(&rhtp->r_lock, RW_READER);
return (vp);
}
rp4_addhash(rp);
*newnode = 1;
return (vp);
}
