/*ARGSUSED*/
int
spec_sync(struct vfs *vfsp,
short flag,
struct cred *cr)
{
struct snode *sync_list;
register struct snode **spp, *sp, *spnext;
register struct vnode *vp;
if (mutex_tryenter(&spec_syncbusy) == 0)
return (0);
if (flag & SYNC_ATTR) {
mutex_exit(&spec_syncbusy);
return (0);
}
mutex_enter(&stable_lock);
sync_list = NULL;
/*
* Find all the snodes that are dirty and add them to the sync_list
*/
for (spp = stable; spp < &stable[STABLESIZE]; spp++) {
for (sp = *spp; sp != NULL; sp = sp->s_next) {
vp = STOV(sp);
/*
* Don't bother sync'ing a vp if it's
* part of a virtual swap device.
*/
if (IS_SWAPVP(vp))
continue;
if (vp->v_type == VBLK && vn_has_cached_data(vp)) {
/*
* Prevent vp from going away before we
* we get a chance to do a VOP_PUTPAGE
* via sync_list processing
*/
VN_HOLD(vp);
sp->s_list = sync_list;
sync_list = sp;
}
}
}
mutex_exit(&stable_lock);
/*
* Now write out all the snodes we marked asynchronously.
*/
for (sp = sync_list; sp != NULL; sp = spnext) {
spnext = sp->s_list;
vp = STOV(sp);
(void) VOP_PUTPAGE(vp, (offset_t)0, (uint_t)0, B_ASYNC, cr);
VN_RELE(vp); /* Release our hold on vnode */
}
mutex_exit(&spec_syncbusy);
return (0);
}
/*
* New Leaf driver open entry point. We make a vnode and go through specfs
* in order to obtain open close exclusions guarantees. Note that we drop
* OTYP_LYR if it was specified - we are going through specfs and it provides
* last close semantics (FKLYR is provided to open(9E)). Also, since
* spec_open will drive attach via e_ddi_hold_devi_by_dev for a makespecvp
* vnode with no SDIP_SET on the common snode, the dev_lopen caller no longer
* needs to call ddi_hold_installed_driver.
*/
int
dev_lopen(dev_t *devp, int flag, int otype, struct cred *cred)
{
struct vnode *vp;
int error;
struct vnode *cvp;
vp = makespecvp(*devp, (otype == OTYP_BLK) ? VBLK : VCHR);
error = VOP_OPEN(&vp, flag | FKLYR, cred, NULL);
if (error == 0) {
/* Pick up the (possibly) new dev_t value. */
*devp = vp->v_rdev;
/*
* Place extra hold on the common vnode, which contains the
* open count, so that it is not destroyed by the VN_RELE of
* the shadow makespecvp vnode below.
*/
cvp = STOV(VTOCS(vp));
VN_HOLD(cvp);
}
/* release the shadow makespecvp vnode. */
VN_RELE(vp);
return (error);
}
/*
* Leaf driver close entry point. We make a vnode and go through specfs in
* order to obtain open close exclusions guarantees. Note that we drop
* OTYP_LYR if it was specified - we are going through specfs and it provides
* last close semantics (FLKYR is provided to close(9E)).
*/
int
dev_lclose(dev_t dev, int flag, int otype, struct cred *cred)
{
struct vnode *vp;
int error;
struct vnode *cvp;
char *funcname;
ulong_t offset;
vp = makespecvp(dev, (otype == OTYP_BLK) ? VBLK : VCHR);
error = VOP_CLOSE(vp, flag | FKLYR, 1, (offset_t)0, cred, NULL);
/*
* Release the extra dev_lopen hold on the common vnode. We inline a
* VN_RELE(cvp) call so that we can detect more dev_lclose calls than
* dev_lopen calls without panic. See vn_rele. If our inline of
* vn_rele called VOP_INACTIVE(cvp, CRED(), ...) we would panic on the
* "release the makespecvp vnode" VN_RELE(vp) that follows - so
* instead we diagnose this situation. Note that the driver has
* still seen a double close(9E), but that would have occurred with
* the old dev_close implementation too.
*/
cvp = STOV(VTOCS(vp));
mutex_enter(&cvp->v_lock);
switch (cvp->v_count) {
default:
cvp->v_count--;
break;
case 0:
VTOS(vp)->s_commonvp = NULL; /* avoid panic */
/*FALLTHROUGH*/
case 1:
/*
* The following message indicates a serious problem in the
* identified driver, the driver should be fixed. If obtaining
* a panic dump is needed to diagnose the driver problem then
* adding "set dev_lclose_ce=3" to /etc/system will cause a
* panic when this occurs.
*/
funcname = modgetsymname((uintptr_t)caller(), &offset);
cmn_err(dev_lclose_ce, "dev_lclose: extra close of dev_t 0x%lx "
"from %s`%s()", dev, mod_containing_pc(caller()),
funcname ? funcname : "unknown...");
break;
}
mutex_exit(&cvp->v_lock);
/* release the makespecvp vnode. */
VN_RELE(vp);
return (error);
}
static int synthfs_insertnode(struct synthfsnode *newnode_sp, struct synthfsnode *parent_sp) {
struct timeval now;
DBG_ASSERT(parent_sp->s_type == SYNTHFS_DIRECTORY);
TAILQ_INSERT_TAIL(&parent_sp->s_u.d.d_subnodes, newnode_sp, s_sibling);
++parent_sp->s_u.d.d_entrycount;
newnode_sp->s_parent = parent_sp;
parent_sp->s_nodeflags |= IN_CHANGE | IN_MODIFIED;
now = time;
VOP_UPDATE(STOV(parent_sp), &now, &now, 0);
return 0;
}
