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Reset proc0 cwdi after unmount. Makes is possible to mount/unmount/mount 

in one process.
(XXX: this code is still horrible)

problem reported by stacktic
This commit is contained in:
pooka 2008-12-31 00:57:15 +00:00
parent e605194ace
commit e8b4276abd
1 changed files with 20 additions and 6 deletions
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26
sys/rump/librump/rumpvfs/rump_vfs.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: rump_vfs.c,v 1.6 2008/12/29 20:39:49 pooka Exp $ */
/* $NetBSD: rump_vfs.c,v 1.7 2008/12/31 00:57:15 pooka Exp $ */
/*
* Copyright (c) 2008 Antti Kantee. All Rights Reserved.
@ -58,6 +58,8 @@ static LIST_HEAD(, fakeblk) fakeblks = LIST_HEAD_INITIALIZER(fakeblks);
static struct cwdinfo rump_cwdi;
static void rump_rcvp_lwpset(struct vnode *, struct vnode *, struct lwp *);
static void
pvfs_init(struct proc *p)
{
@ -141,11 +143,11 @@ rump_mnt_mount(struct mount *mp, const char *path, void *data, size_t *dlen)
/*
* XXX: set a root for lwp0. This is strictly not correct,
* but makes things works for single fs case without having
* but makes things work for single fs case without having
* to manually call rump_rcvp_set().
*/
VFS_ROOT(mp, &rvp);
rump_rcvp_set(rvp, rvp);
rump_rcvp_lwpset(rvp, rvp, &lwp0);
vput(rvp);
return rv;
@ -155,6 +157,12 @@ void
rump_mnt_destroy(struct mount *mp)
{
/* See rcvp XXX above */
rump_cwdi.cwdi_rdir = NULL;
vref(rootvnode);
rump_cwdi.cwdi_cdir = rootvnode;
printf("refcount %d\n", rootvnode->v_uobj.uo_refs);
mount_finispecific(mp);
kmem_free(mp, sizeof(*mp));
}
@ -519,10 +527,9 @@ rump_biodone(void *arg, size_t count, int error)
rump_intr_exit();
}
void
rump_rcvp_set(struct vnode *rvp, struct vnode *cvp)
static void
rump_rcvp_lwpset(struct vnode *rvp, struct vnode *cvp, struct lwp *l)
{
struct lwp *l = curlwp;
struct cwdinfo *cwdi = l->l_proc->p_cwdi;
KASSERT(cvp);
@ -540,6 +547,13 @@ rump_rcvp_set(struct vnode *rvp, struct vnode *cvp)
rw_exit(&cwdi->cwdi_lock);
}
void
rump_rcvp_set(struct vnode *rvp, struct vnode *cvp)
{
rump_rcvp_lwpset(rvp, cvp, curlwp);
}
struct vnode *
rump_cdir_get()
{