/*
* Close a mounted file descriptor.
* Remove any locks and apply the VOP_CLOSE operation to the vnode for
* the file descriptor.
*/
static int
nm_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *crp,
caller_context_t *ct)
{
struct namenode *nodep = VTONM(vp);
int error = 0;
(void) cleanlocks(vp, ttoproc(curthread)->p_pid, 0);
cleanshares(vp, ttoproc(curthread)->p_pid);
error = VOP_CLOSE(nodep->nm_filevp, flag, count, offset, crp, ct);
if (count == 1) {
(void) VOP_FSYNC(nodep->nm_filevp, FSYNC, crp, ct);
/*
* Before VN_RELE() we need to remove the vnode from
* the hash table. We should only do so in the NMNMNT case.
* In other cases, nodep->nm_filep keeps a reference
* to nm_filevp and the entry in the hash table doesn't
* hurt.
*/
if ((nodep->nm_flag & NMNMNT) != 0) {
mutex_enter(&ntable_lock);
nameremove(nodep);
mutex_exit(&ntable_lock);
}
VN_RELE(nodep->nm_filevp);
}
return (error);
}
/*
* 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);
}
