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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <fs/fs_subr.h>
#include <sys/errno.h>
#include <sys/kmem.h>
#include <sys/modctl.h>
#include <sys/objfs.h>
#include <sys/objfs_impl.h>
#include <sys/vfs_opreg.h>
#include <sys/systm.h>
extern int last_module_id;
static int objfs_root_do_lookup(vnode_t *, const char *, vnode_t **, ino64_t *,
cred_t *, int, int *, pathname_t *);
static int objfs_root_do_readdir(vnode_t *, void *, int *,
offset_t *, offset_t *, void *, int);
vnode_t *
objfs_create_root(vfs_t *vfsp)
{
vnode_t *vp = gfs_root_create(sizeof (objfs_rootnode_t), vfsp,
objfs_ops_root, OBJFS_INO_ROOT, NULL, NULL, OBJFS_NAME_MAX,
objfs_root_do_readdir, objfs_root_do_lookup);
return (vp);
}
/* ARGSUSED */
static int
objfs_root_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
caller_context_t *ct)
{
vap->va_type = VDIR;
vap->va_mode = 0555;
vap->va_nodeid = gfs_file_inode(vp);
vap->va_nlink = objfs_nobjs() + 2;
vap->va_size = vap->va_nlink;
vap->va_atime.tv_sec = vp->v_vfsp->vfs_mtime;
vap->va_atime.tv_nsec = 0;
vap->va_mtime = vap->va_ctime = vap->va_atime;
return (objfs_common_getattr(vp, vap));
}
/* ARGSUSED */
static int
objfs_root_do_lookup(vnode_t *vp, const char *nm, vnode_t **vpp, ino64_t *inop,
cred_t *cr, int flags, int *deflags, pathname_t *rpnp)
{
int result = ENOENT;
struct modctl *mp;
/*
* Run through all the loaded modules on the system looking for
* a matching module name.
*/
mutex_enter(&mod_lock);
mp = &modules;
do {
if (mp->mod_loaded &&
strcmp(nm, mp->mod_modname) == 0) {
/*
* We drop mod_lock in order to do allocations,
* as modctls are persistent.
*/
mutex_exit(&mod_lock);
*vpp = objfs_create_odirnode(vp, mp);
*inop = OBJFS_INO_ODIR(mp->mod_id);
mutex_enter(&mod_lock);
result = 0;
break;
}
} while ((mp = mp->mod_next) != &modules);
mutex_exit(&mod_lock);
return (result);
}
/* ARGSUSED */
int
objfs_root_do_readdir(vnode_t *vp, void *dp, int *eofp,
offset_t *offp, offset_t *nextp, void *data, int flags)
{
struct modctl **mpp = data;
struct modctl *mp = *mpp;
struct dirent64 *odp = dp;
ASSERT(!(flags & V_RDDIR_ENTFLAGS));
mutex_enter(&mod_lock);
/* Check for EOF */
if (*offp >= last_module_id) {
*eofp = 1;
mutex_exit(&mod_lock);
return (0);
}
/*
* Find the appropriate modctl
*/
while (mp->mod_id < *offp) {
mp = mp->mod_next;
ASSERT(mp != &modules);
}
while (!mp->mod_loaded && mp != &modules)
mp = mp->mod_next;
if (mp == &modules && *offp != 0) {
*eofp = 1;
mutex_exit(&mod_lock);
return (0);
}
/*
* The modctl will not change, as they are persistent.
*/
mutex_exit(&mod_lock);
(void) strncpy(odp->d_name, mp->mod_modname, OBJFS_NAME_MAX);
odp->d_ino = OBJFS_INO_ODIR(mp->mod_id);
*offp = mp->mod_id;
*nextp = mp->mod_id + 1;
return (0);
}
/* ARGSUSED */
static int
objfs_root_readdir(vnode_t *vp, uio_t *uiop, cred_t *cr, int *eofp,
caller_context_t *ct, int flags)
{
struct modctl *mp = &modules;
return (gfs_dir_readdir(vp, uiop, eofp, &mp, cr, ct, flags));
}
const fs_operation_def_t objfs_tops_root[] = {
{ VOPNAME_OPEN, { .vop_open = objfs_dir_open } },
{ VOPNAME_CLOSE, { .vop_close = objfs_common_close } },
{ VOPNAME_IOCTL, { .error = fs_inval } },
{ VOPNAME_GETATTR, { .vop_getattr = objfs_root_getattr } },
{ VOPNAME_ACCESS, { .vop_access = objfs_dir_access } },
{ VOPNAME_READDIR, { .vop_readdir = objfs_root_readdir } },
{ VOPNAME_LOOKUP, { .vop_lookup = gfs_vop_lookup } },
{ VOPNAME_SEEK, { .vop_seek = fs_seek } },
{ VOPNAME_INACTIVE, { .vop_inactive = gfs_vop_inactive } },
{ NULL }
};
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