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NetBSD/sys/fs/puffs/puffs_vnops.c
pooka 898c6532b4 don't allow mmap if operating uncached
2006-11-28 13:20:03 +00:00

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/* $NetBSD: puffs_vnops.c,v 1.16 2006/11/28 13:20:03 pooka Exp $ */
/*
* Copyright (c) 2005, 2006 Antti Kantee. All Rights Reserved.
*
* Development of this software was supported by the
* Google Summer of Code program and the Ulla Tuominen Foundation.
* The Google SoC project was mentored by Bill Studenmund.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.16 2006/11/28 13:20:03 pooka Exp $");
#include <sys/param.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/namei.h>
#include <fs/puffs/puffs_msgif.h>
#include <fs/puffs/puffs_sys.h>
#include <miscfs/fifofs/fifo.h>
#include <miscfs/genfs/genfs.h>
#include <miscfs/specfs/specdev.h>
int puffs_lookup(void *);
int puffs_create(void *);
int puffs_access(void *);
int puffs_mknod(void *);
int puffs_open(void *);
int puffs_close(void *);
int puffs_getattr(void *);
int puffs_setattr(void *);
int puffs_revoke(void *);
int puffs_reclaim(void *);
int puffs_readdir(void *);
int puffs_poll(void *);
int puffs_fsync(void *);
int puffs_seek(void *);
int puffs_remove(void *);
int puffs_mkdir(void *);
int puffs_rmdir(void *);
int puffs_link(void *);
int puffs_readlink(void *);
int puffs_symlink(void *);
int puffs_rename(void *);
int puffs_read(void *);
int puffs_write(void *);
int puffs_fcntl(void *);
int puffs_ioctl(void *);
int puffs_inactive(void *);
int puffs_print(void *);
int puffs_pathconf(void *);
int puffs_advlock(void *);
int puffs_strategy(void *);
int puffs_bmap(void *);
int puffs_mmap(void *);
/* VOP_LEASE() not included */
int puffs_generic(void *);
#if 0
#define puffs_lock genfs_lock
#define puffs_unlock genfs_unlock
#define puffs_islocked genfs_islocked
#else
int puffs_lock(void *);
int puffs_unlock(void *);
int puffs_islocked(void *);
#endif
/*
* no special specops for now. hmm, probably don't want to handle
* these synchronously, since they don't actually demand any
* response. so maybe we need another touser-type thing...
*/
#define puffsspec_read spec_read
#define puffsspec_write spec_write
#define puffsspec_close spec_close
/* no special fifo-ooops either */
#define puffsfifo_read fifo_read
#define puffsfifo_write fifo_write
#define puffsfifo_close fifo_close
int (**puffs_vnodeop_p)(void *);
const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, puffs_lookup }, /* lookup */
{ &vop_create_desc, puffs_create }, /* create */
{ &vop_mknod_desc, puffs_mknod }, /* mknod */
{ &vop_open_desc, puffs_open }, /* open */
{ &vop_close_desc, puffs_close }, /* close */
{ &vop_access_desc, puffs_access }, /* access */
{ &vop_getattr_desc, puffs_getattr }, /* getattr */
{ &vop_setattr_desc, puffs_setattr }, /* setattr */
{ &vop_read_desc, puffs_read }, /* read */
{ &vop_write_desc, puffs_write }, /* write */
{ &vop_fcntl_desc, puffs_fcntl }, /* fcntl */
{ &vop_ioctl_desc, puffs_ioctl }, /* ioctl */
{ &vop_revoke_desc, puffs_revoke }, /* revoke */
{ &vop_fsync_desc, puffs_fsync }, /* fsync */
{ &vop_seek_desc, puffs_seek }, /* seek */
{ &vop_remove_desc, puffs_remove }, /* remove */
{ &vop_link_desc, puffs_link }, /* link */
{ &vop_rename_desc, puffs_rename }, /* rename */
{ &vop_mkdir_desc, puffs_mkdir }, /* mkdir */
{ &vop_rmdir_desc, puffs_rmdir }, /* rmdir */
{ &vop_symlink_desc, puffs_symlink }, /* symlink */
{ &vop_readdir_desc, puffs_readdir }, /* readdir */
{ &vop_readlink_desc, puffs_readlink }, /* readlink */
{ &vop_abortop_desc, genfs_abortop }, /* abortop */
{ &vop_inactive_desc, puffs_inactive }, /* inactive */
{ &vop_reclaim_desc, puffs_reclaim }, /* reclaim */
{ &vop_lock_desc, puffs_lock }, /* lock */
{ &vop_unlock_desc, puffs_unlock }, /* unlock */
{ &vop_bmap_desc, puffs_bmap }, /* bmap */
{ &vop_strategy_desc, puffs_strategy }, /* strategy */
{ &vop_print_desc, puffs_print }, /* print */
{ &vop_islocked_desc, puffs_islocked }, /* islocked */
{ &vop_pathconf_desc, puffs_pathconf }, /* pathconf */
{ &vop_advlock_desc, puffs_advlock }, /* advlock */
{ &vop_bwrite_desc, genfs_nullop }, /* bwrite */
{ &vop_getpages_desc, genfs_getpages }, /* getpages */
{ &vop_putpages_desc, genfs_putpages }, /* putpages */
{ &vop_mmap_desc, puffs_mmap }, /* mmap */
{ &vop_poll_desc, genfs_eopnotsupp }, /* poll XXX */
{ &vop_poll_desc, genfs_eopnotsupp }, /* kqfilter XXX */
{ NULL, NULL }
};
const struct vnodeopv_desc puffs_vnodeop_opv_desc =
{ &puffs_vnodeop_p, puffs_vnodeop_entries };
int (**puffs_specop_p)(void *);
const struct vnodeopv_entry_desc puffs_specop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */
{ &vop_create_desc, spec_create }, /* genfs_badop */
{ &vop_mknod_desc, spec_mknod }, /* genfs_badop */
{ &vop_open_desc, spec_open }, /* spec_open */
{ &vop_close_desc, puffsspec_close }, /* close */
{ &vop_access_desc, puffs_access }, /* access */
{ &vop_getattr_desc, puffs_getattr }, /* getattr */
{ &vop_setattr_desc, puffs_setattr }, /* setattr */
{ &vop_read_desc, puffsspec_read }, /* read */
{ &vop_write_desc, puffsspec_write }, /* write */
{ &vop_lease_desc, spec_lease_check }, /* genfs_nullop */
{ &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */
{ &vop_fcntl_desc, genfs_fcntl }, /* dummy */
{ &vop_poll_desc, spec_poll }, /* spec_poll */
{ &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */
{ &vop_revoke_desc, spec_revoke }, /* genfs_revoke */
{ &vop_mmap_desc, spec_mmap }, /* genfs_mmap (dummy) */
{ &vop_fsync_desc, spec_fsync }, /* vflushbuf */
{ &vop_seek_desc, spec_seek }, /* genfs_nullop */
{ &vop_remove_desc, spec_remove }, /* genfs_badop */
{ &vop_link_desc, spec_link }, /* genfs_badop */
{ &vop_rename_desc, spec_rename }, /* genfs_badop */
{ &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */
{ &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */
{ &vop_symlink_desc, spec_symlink }, /* genfs_badop */
{ &vop_readdir_desc, spec_readdir }, /* genfs_badop */
{ &vop_readlink_desc, spec_readlink }, /* genfs_badop */
{ &vop_abortop_desc, spec_abortop }, /* genfs_badop */
{ &vop_inactive_desc, puffs_inactive }, /* inactive */
{ &vop_reclaim_desc, puffs_reclaim }, /* reclaim */
{ &vop_lock_desc, puffs_lock }, /* lock */
{ &vop_unlock_desc, puffs_unlock }, /* unlock */
{ &vop_bmap_desc, spec_bmap }, /* dummy */
{ &vop_strategy_desc, spec_strategy }, /* dev strategy */
{ &vop_print_desc, puffs_print }, /* print */
{ &vop_islocked_desc, puffs_islocked }, /* islocked */
{ &vop_pathconf_desc, spec_pathconf }, /* pathconf */
{ &vop_advlock_desc, spec_advlock }, /* lf_advlock */
{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
{ &vop_getpages_desc, spec_getpages }, /* genfs_getpages */
{ &vop_putpages_desc, spec_putpages }, /* genfs_putpages */
#if 0
{ &vop_openextattr_desc, _openextattr }, /* openextattr */
{ &vop_closeextattr_desc, _closeextattr }, /* closeextattr */
{ &vop_getextattr_desc, _getextattr }, /* getextattr */
{ &vop_setextattr_desc, _setextattr }, /* setextattr */
{ &vop_listextattr_desc, _listextattr }, /* listextattr */
{ &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */
#endif
{ NULL, NULL }
};
const struct vnodeopv_desc puffs_specop_opv_desc =
{ &puffs_specop_p, puffs_specop_entries };
int (**puffs_fifoop_p)(void *);
const struct vnodeopv_entry_desc puffs_fifoop_entries[] = {
{ &vop_default_desc, vn_default_error },
{ &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */
{ &vop_create_desc, fifo_create }, /* genfs_badop */
{ &vop_mknod_desc, fifo_mknod }, /* genfs_badop */
{ &vop_open_desc, fifo_open }, /* open */
{ &vop_close_desc, puffsfifo_close }, /* close */
{ &vop_access_desc, puffs_access }, /* access */
{ &vop_getattr_desc, puffs_getattr }, /* getattr */
{ &vop_setattr_desc, puffs_setattr }, /* setattr */
{ &vop_read_desc, puffsfifo_read }, /* read */
{ &vop_write_desc, puffsfifo_write }, /* write */
{ &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */
{ &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
{ &vop_fcntl_desc, genfs_fcntl }, /* dummy */
{ &vop_poll_desc, fifo_poll }, /* poll */
{ &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */
{ &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */
{ &vop_mmap_desc, fifo_mmap }, /* genfs_badop */
{ &vop_fsync_desc, puffs_fsync }, /* fsync */
{ &vop_seek_desc, fifo_seek }, /* genfs_badop */
{ &vop_remove_desc, fifo_remove }, /* genfs_badop */
{ &vop_link_desc, fifo_link }, /* genfs_badop */
{ &vop_rename_desc, fifo_rename }, /* genfs_badop */
{ &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */
{ &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */
{ &vop_symlink_desc, fifo_symlink }, /* genfs_badop */
{ &vop_readdir_desc, fifo_readdir }, /* genfs_badop */
{ &vop_readlink_desc, fifo_readlink }, /* genfs_badop */
{ &vop_abortop_desc, fifo_abortop }, /* genfs_badop */
{ &vop_inactive_desc, puffs_inactive }, /* inactive */
{ &vop_reclaim_desc, puffs_reclaim }, /* reclaim */
{ &vop_lock_desc, puffs_lock }, /* lock */
{ &vop_unlock_desc, puffs_unlock }, /* unlock */
{ &vop_bmap_desc, fifo_bmap }, /* dummy */
{ &vop_strategy_desc, fifo_strategy }, /* genfs_badop */
{ &vop_print_desc, puffs_print }, /* print */
{ &vop_islocked_desc, puffs_islocked }, /* islocked */
{ &vop_pathconf_desc, fifo_pathconf }, /* pathconf */
{ &vop_advlock_desc, fifo_advlock }, /* genfs_einval */
{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
{ &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/
#if 0
{ &vop_openextattr_desc, _openextattr }, /* openextattr */
{ &vop_closeextattr_desc, _closeextattr }, /* closeextattr */
{ &vop_getextattr_desc, _getextattr }, /* getextattr */
{ &vop_setextattr_desc, _setextattr }, /* setextattr */
{ &vop_listextattr_desc, _listextattr }, /* listextattr */
{ &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */
#endif
{ NULL, NULL }
};
const struct vnodeopv_desc puffs_fifoop_opv_desc =
{ &puffs_fifoop_p, puffs_fifoop_entries };
#define LOCKEDVP(a) (VOP_ISLOCKED(a) ? (a) : NULL)
int
puffs_lookup(void *v)
{
struct vop_lookup_args /* {
struct vnode * a_dvp;
struct vnode ** a_vpp;
struct componentname * a_cnp;
} */ *ap = v;
struct puffs_mount *pmp;
struct componentname *cnp;
struct vnode *vp, *dvp;
int wantpunlock, isdot;
int error;
PUFFS_VNREQ(lookup);
pmp = MPTOPUFFSMP(ap->a_dvp->v_mount);
cnp = ap->a_cnp;
dvp = ap->a_dvp;
*ap->a_vpp = NULL;
/* first things first: check access */
error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp);
if (error)
return error;
wantpunlock = ~cnp->cn_flags & (LOCKPARENT | ISLASTCN);
isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.';
DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %lx\n",
cnp->cn_nameptr, dvp, cnp->cn_nameiop));
/*
* Do sanity checks we can do without consulting userland.
*/
/*
* last component check & ro fs
*
* hmmm... why doesn't this check for create?
*/
if ((cnp->cn_flags & ISLASTCN)
&& (ap->a_dvp->v_mount->mnt_flag & MNT_RDONLY)
&& (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) {
DPRINTF(("puffs_lookup: write lookup for read-only fs!\n"));
return EROFS;
}
/*
* Check if someone fed it into the cache
*/
error = cache_lookup(dvp, ap->a_vpp, cnp);
if (error >= 0)
return error;
if (isdot) {
vp = ap->a_dvp;
vref(vp);
*ap->a_vpp = vp;
return 0;
}
puffs_makecn(&lookup_arg.pvnr_cn, cnp);
if (cnp->cn_flags & ISDOTDOT)
VOP_UNLOCK(dvp, 0);
error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP,
&lookup_arg, sizeof(lookup_arg), VPTOPNC(dvp), LOCKEDVP(dvp), NULL);
DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error));
/*
* In case of error, leave parent locked. There is no new
* vnode to play with, so be happy with the NULL value given
* to vpp in the beginning.
*/
if (error) {
if (error == ENOENT) {
if ((cnp->cn_flags & ISLASTCN)
&& (cnp->cn_nameiop == CREATE
|| cnp->cn_nameiop == RENAME)) {
cnp->cn_flags |= SAVENAME;
error = EJUSTRETURN;
}
}
*ap->a_vpp = NULL;
if (cnp->cn_flags & ISDOTDOT)
if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0)
cnp->cn_flags |= PDIRUNLOCK;
return error;
}
vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode);
if (!vp) {
error = puffs_getvnode(dvp->v_mount,
lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype,
lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp);
if (error) {
if (cnp->cn_flags & ISDOTDOT)
if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0)
cnp->cn_flags |= PDIRUNLOCK;
return error;
}
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
}
if (cnp->cn_flags & ISDOTDOT) {
if (cnp->cn_flags & LOCKPARENT &&
cnp->cn_flags & ISLASTCN) {
if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0) {
cnp->cn_flags |= PDIRUNLOCK;
}
}
} else {
if (wantpunlock) {
VOP_UNLOCK(dvp, 0);
cnp->cn_flags |= PDIRUNLOCK;
}
}
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, vp, cnp);
*ap->a_vpp = vp;
return 0;
}
int
puffs_create(void *v)
{
struct vop_create_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap = v;
int error;
PUFFS_VNREQ(create);
puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp);
create_arg.pvnr_va = *ap->a_vap;
error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE,
&create_arg, sizeof(create_arg), VPTOPNC(ap->a_dvp),
ap->a_dvp, NULL);
if (error)
goto out;
error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp,
create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0);
out:
if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0)
PNBUF_PUT(ap->a_cnp->cn_pnbuf);
vput(ap->a_dvp);
return error;
}
int
puffs_mknod(void *v)
{
struct vop_mknod_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap = v;
int error;
PUFFS_VNREQ(mknod);
puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp);
mknod_arg.pvnr_va = *ap->a_vap;
error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD,
&mknod_arg, sizeof(mknod_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL);
if (error)
goto out;
error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp,
mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type,
ap->a_vap->va_rdev);
out:
if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0)
PNBUF_PUT(ap->a_cnp->cn_pnbuf);
vput(ap->a_dvp);
return error;
}
int
puffs_open(void *v)
{
struct vop_open_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_mode;
kauth_cred_t a_cred;
struct lwp *a_l;
} */ *ap = v;
PUFFS_VNREQ(open);
open_arg.pvnr_mode = ap->a_mode;
puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred);
open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l);
return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_OPEN,
&open_arg, sizeof(open_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL);
}
int
puffs_close(void *v)
{
struct vop_close_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_fflag;
kauth_cred_t a_cred;
struct lwp *a_l;
} */ *ap = v;
PUFFS_VNREQ(close);
close_arg.pvnr_fflag = ap->a_fflag;
puffs_credcvt(&close_arg.pvnr_cred, ap->a_cred);
close_arg.pvnr_pid = puffs_lwp2pid(ap->a_l);
return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE,
&close_arg, sizeof(close_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL);
}
int
puffs_access(void *v)
{
struct vop_access_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_mode;
kauth_cred_t a_cred;
struct lwp *a_l;
} */ *ap = v;
PUFFS_VNREQ(access);
access_arg.pvnr_mode = ap->a_mode;
access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l);
puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred);
return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ACCESS,
&access_arg, sizeof(access_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL);
}
int
puffs_getattr(void *v)
{
struct vop_getattr_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct vattr *a_vap;
kauth_cred_t a_cred;
struct lwp *a_l;
} */ *ap = v;
struct mount *mp;
int error;
PUFFS_VNREQ(getattr);
mp = ap->a_vp->v_mount;
vattr_null(&getattr_arg.pvnr_va);
puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred);
getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l);
/*
* XXX + XX (dos equis): this can't go through the unlock/lock
* cycle, since it can be called from uvn_attach(), which fiddles
* around with VXLOCK and therefore breaks vn_lock(). Proper
* fix pending.
*/
error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_GETATTR,
&getattr_arg, sizeof(getattr_arg), VPTOPNC(ap->a_vp),
NULL /* XXXseeabove: should be LOCKEDVP(ap->a_vp) */, NULL);
if (error)
return error;
(void)memcpy(ap->a_vap, &getattr_arg.pvnr_va, sizeof(struct vattr));
/*
* fill in information userspace does not have
* XXX: but would it be better to do fsid at the generic level?
*/
ap->a_vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
return 0;
}
int
puffs_setattr(void *v)
{
struct vop_getattr_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct vattr *a_vap;
kauth_cred_t a_cred;
struct lwp *a_l;
} */ *ap = v;
int error;
PUFFS_VNREQ(setattr);
(void)memcpy(&setattr_arg.pvnr_va, ap->a_vap, sizeof(struct vattr));
puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred);
setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l);
error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR,
&setattr_arg, sizeof(setattr_arg), VPTOPNC(ap->a_vp),
ap->a_vp, NULL);
if (error)
return error;
if (ap->a_vap->va_size != VNOVAL)
uvm_vnp_setsize(ap->a_vp, ap->a_vap->va_size);
return 0;
}
int
puffs_revoke(void *v)
{
struct vop_revoke_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_flags;
} */ *ap = v;
PUFFS_VNREQ(revoke);
revoke_arg.pvnr_flags = ap->a_flags;
/* don't really care if userspace doesn't want to play along */
puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REVOKE,
&revoke_arg, sizeof(revoke_arg), VPTOPNC(ap->a_vp), NULL, NULL);
return genfs_revoke(v);
}
/*
* There is no technical need to have this travel to userspace
* synchronously. So once async reply support is in place, make this
* async.
*/
int
puffs_inactive(void *v)
{
struct vop_inactive_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct lwp *a_l;
} */ *ap = v;
struct puffs_node *pnode;
int rv, vnrefs;
PUFFS_VNREQ(inactive);
/*
* XXX: think about this after we really start unlocking
* when going to userspace
*/
pnode = ap->a_vp->v_data;
pnode->pn_stat |= PNODE_INACTIVE;
inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l);
rv = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_INACTIVE,
&inactive_arg, sizeof(inactive_arg), VPTOPNC(ap->a_vp),
ap->a_vp, NULL);
/* can't trust userspace return value? simulate safe answer */
if (rv)
vnrefs = 1;
else
vnrefs = inactive_arg.pvnr_backendrefs;
VOP_UNLOCK(ap->a_vp, 0);
/*
* user server thinks it's gone? then don't be afraid care,
* node's life was already all it would ever be
*/
if (vnrefs == 0)
vrecycle(ap->a_vp, NULL, ap->a_l);
return 0;
}
int
puffs_reclaim(void *v)
{
struct vop_reclaim_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct lwp *a_l;
} */ *ap = v;
struct puffs_mount *pmp;
int error;
PUFFS_VNREQ(reclaim);
/*
* first things first: check if someone is trying to reclaim the
* root vnode. do not allow that to travel to userspace.
* Note that we don't need to take the lock similarly to
* puffs_root(), since there is only one of us.
*/
if (ap->a_vp->v_flag & VROOT) {
pmp = MPTOPUFFSMP(ap->a_vp->v_mount);
#ifdef DIAGNOSTIC
simple_lock(&pmp->pmp_lock);
if (pmp->pmp_root == NULL)
panic("puffs_reclaim: releasing root vnode (%p) twice",
ap->a_vp);
simple_unlock(&pmp->pmp_lock);
#endif
pmp->pmp_root = NULL;
puffs_putvnode(ap->a_vp);
return 0;
}
reclaim_arg.pvnr_pid = puffs_lwp2pid(ap->a_l);
error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_RECLAIM,
&reclaim_arg, sizeof(reclaim_arg), VPTOPNC(ap->a_vp), NULL, NULL);
#if 0
/*
* XXX: if reclaim fails for any other reason than the userspace
* being dead, we should consider unmounting the filesystem, since
* we can't trust it to be in a consistent state anymore. But for
* now, just ignore all errors.
*/
if (error)
return error;
#endif
puffs_putvnode(ap->a_vp);
return 0;
}
int
puffs_readdir(void *v)
{
struct vop_readdir_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct uio *a_uio;
kauth_cred_t a_cred;
int *a_eofflag;
off_t **a_cookies;
int *a_ncookies;
} */ *ap = v;
struct puffs_vnreq_readdir *readdir_argp;
size_t argsize;
struct uio *uio = ap->a_uio;
size_t howmuch;
int error;
/* worry about these later */
if (!(ap->a_cookies == NULL && ap->a_ncookies == NULL))
return EOPNOTSUPP;
argsize = sizeof(struct puffs_vnreq_readdir);
readdir_argp = malloc(argsize, M_PUFFS, M_ZERO | M_WAITOK);
puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred);
readdir_argp->pvnr_offset = uio->uio_offset;
readdir_argp->pvnr_resid = uio->uio_resid;
error = puffs_vntouser_adjbuf(MPTOPUFFSMP(ap->a_vp->v_mount),
PUFFS_VN_READDIR, (void **)&readdir_argp, &argsize,
sizeof(struct puffs_vnreq_readdir),
VPTOPNC(ap->a_vp), ap->a_vp, NULL);
if (error)
goto out;
/* userspace is cheating? */
if (readdir_argp->pvnr_resid > uio->uio_resid) {
error = EINVAL;
goto out;
}
/* bouncy-wouncy with the directory data */
howmuch = uio->uio_resid - readdir_argp->pvnr_resid;
error = uiomove(readdir_argp->pvnr_dent, howmuch, uio);
if (error)
goto out;
uio->uio_offset = readdir_argp->pvnr_offset;
out:
free(readdir_argp, M_PUFFS);
return error;
}
int
puffs_poll(void *v)
{
struct vop_poll_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_events;
struct lwp *a_l;
}<7D>*/ *ap = v;
PUFFS_VNREQ(poll);
poll_arg.pvnr_events = ap->a_events;
poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l);
return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL,
&poll_arg, sizeof(poll_arg), VPTOPNC(ap->a_vp), NULL, NULL);
}
int
puffs_fsync(void *v)
{
struct vop_fsync_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
kauth_cred_t a_cred;
int a_flags;
off_t a_offlo;
off_t a_offhi;
struct lwp *a_l;
} */ *ap = v;
struct puffs_vnreq_fsync *fsync_argp;
struct vnode *vp;
int pflags, error;
PUFFS_VNREQ(fsync);
vp = ap->a_vp;
pflags = PGO_CLEANIT;
if (ap->a_flags & FSYNC_WAIT) {
pflags |= PGO_SYNCIO;
fsync_argp = &fsync_arg;
} else {
fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync),
M_PUFFS, M_ZERO | M_NOWAIT);
if (fsync_argp == NULL)
return ENOMEM;
}
/*
* flush pages to avoid being overly dirty
*/
simple_lock(&vp->v_interlock);
error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo),
round_page(ap->a_offhi), pflags);
if (error)
return error;
puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred);
fsync_argp->pvnr_flags = ap->a_flags;
fsync_argp->pvnr_offlo = ap->a_offlo;
fsync_argp->pvnr_offhi = ap->a_offhi;
fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l);
/*
* XXX: see comment at puffs_getattr about locking
*
* If we are not required to wait, do a FAF operation.
* Otherwise block here.
*/
if (ap->a_flags & FSYNC_WAIT) {
error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount),
PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp),
VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL);
} else {
/* FAF is always "succesful" */
error = 0;
puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount),
PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp),
VPTOPNC(vp));
}
return error;
}
int
puffs_seek(void *v)
{
struct vop_seek_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
off_t a_oldoff;
off_t a_newoff;
kauth_cred_t a_cred;
} */ *ap = v;
PUFFS_VNREQ(seek);
seek_arg.pvnr_oldoff = ap->a_oldoff;
seek_arg.pvnr_newoff = ap->a_newoff;
puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred);
/*
* XXX: seems like seek is called with an unlocked vp, but
* it can't hurt to play safe
*/
return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK,
&seek_arg, sizeof(seek_arg), VPTOPNC(ap->a_vp),
LOCKEDVP(ap->a_vp), NULL);
}
int
puffs_remove(void *v)
{
struct vop_remove_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap = v;
int error;
PUFFS_VNREQ(remove);
remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp);
puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp);
error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE,
&remove_arg, sizeof(remove_arg), VPTOPNC(ap->a_dvp),
ap->a_dvp, ap->a_vp);
vput(ap->a_vp);
vput(ap->a_dvp);
return error;
}
int
puffs_mkdir(void *v)
{
struct vop_mkdir_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap = v;
int error;
PUFFS_VNREQ(mkdir);
puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp);
mkdir_arg.pvnr_va = *ap->a_vap;
/* XXX: wouldn't need to relock dvp, but that's life */
error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR,
&mkdir_arg, sizeof(mkdir_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL);
if (error)
goto out;
error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp,
mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0);
out:
if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0)
PNBUF_PUT(ap->a_cnp->cn_pnbuf);
vput(ap->a_dvp);
return error;
}
int
puffs_rmdir(void *v)
{
struct vop_rmdir_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap = v;
int error;
PUFFS_VNREQ(rmdir);
rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp);
puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp);
error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR,
&rmdir_arg, sizeof(rmdir_arg), VPTOPNC(ap->a_dvp),
ap->a_dvp, ap->a_vp);
vput(ap->a_dvp);
vput(ap->a_vp);
return error;
}
int
puffs_link(void *v)
{
struct vop_link_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
}<7D>*/ *ap = v;
int error;
PUFFS_VNREQ(link);
link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp);
puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp);
error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK,
&link_arg, sizeof(link_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL);
vput(ap->a_dvp);
return error;
}
int
puffs_symlink(void *v)
{
struct vop_symlink_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
char *a_target;
}<7D>*/ *ap = v;
int error;
PUFFS_VNREQ(symlink); /* XXX: large structure */
*ap->a_vpp = NULL;
puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp);
symlink_arg.pvnr_va = *ap->a_vap;
(void)strlcpy(symlink_arg.pvnr_link, ap->a_target,
sizeof(symlink_arg.pvnr_link));
/* XXX: don't need to relock parent */
error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount),
PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg),
VPTOPNC(ap->a_dvp), ap->a_dvp, NULL);
if (error)
goto out;
error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp,
symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0);
out:
if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0)
PNBUF_PUT(ap->a_cnp->cn_pnbuf);
vput(ap->a_dvp);
return error;
}
int
puffs_readlink(void *v)
{
struct vop_readlink_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct uio *a_uio;
kauth_cred_t a_cred;
} */ *ap = v;
int error;
PUFFS_VNREQ(readlink);
puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred);
readlink_arg.pvnr_linklen = sizeof(readlink_arg.pvnr_link);
error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount),
PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg),
VPTOPNC(ap->a_vp), ap->a_vp, NULL);
if (error)
return error;
readlink_arg.pvnr_link[readlink_arg.pvnr_linklen] = '\0';
return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen,
ap->a_uio);
}
/* XXXXXXX: think about locking & userspace op delocking... */
int
puffs_rename(void *v)
{
struct vop_rename_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_fdvp;
struct vnode *a_fvp;
struct componentname *a_fcnp;
struct vnode *a_tdvp;
struct vnode *a_tvp;
struct componentname *a_tcnp;
}<7D>*/ *ap = v;
int error;
PUFFS_VNREQ(rename);
/*
* participate in the duck hunt
* (I could do with some canard a la presse, so hopefully
* this is succesful)
*/
KASSERT(ap->a_tdvp != ap->a_tvp);
if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) {
error = EXDEV;
goto out;
}
rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp);
rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp);
if (ap->a_tvp)
rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp);
else
rename_arg.pvnr_cookie_targ = NULL;
puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp);
puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp);
error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount),
PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg),
VPTOPNC(ap->a_fdvp), NULL, NULL);
out:
vput(ap->a_tdvp);
if (ap->a_tvp != NULL)
vput(ap->a_tvp);
vrele(ap->a_fdvp);
vrele(ap->a_fvp);
return error;
}
int
puffs_read(void *v)
{
struct vop_read_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
kauth_cred_t a_cred;
} */ *ap = v;
struct puffs_vnreq_read *read_argp;
struct puffs_mount *pmp;
struct vnode *vp;
struct uio *uio;
void *win;
size_t tomove, argsize;
vsize_t bytelen;
int error, ubcflags;
uio = ap->a_uio;
vp = ap->a_vp;
read_argp = NULL;
error = 0;
pmp = MPTOPUFFSMP(vp->v_mount);
/* std sanity */
if (uio->uio_resid == 0)
return 0;
if (uio->uio_offset < 0)
return EINVAL;
if (vp->v_type == VREG && (pmp->pmp_flags & PUFFSFLAG_NOCACHE) == 0) {
const int advice = IO_ADV_DECODE(ap->a_ioflag);
ubcflags = 0;
if (UBC_WANT_UNMAP(vp))
ubcflags = UBC_UNMAP;
while (uio->uio_resid > 0) {
bytelen = MIN(uio->uio_resid,
vp->v_size - uio->uio_offset);
if (bytelen == 0)
break;
win = ubc_alloc(&vp->v_uobj, uio->uio_offset,
&bytelen, advice, UBC_READ);
error = uiomove(win, bytelen, uio);
ubc_release(win, ubcflags);
if (error)
break;
}
if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0)
puffs_updatenode(vp, PUFFS_UPDATEATIME);
} else {
/*
* in case it's not a regular file or we're operating
* uncached, do read in the old-fashioned style,
* i.e. explicit read operations
*/
tomove = PUFFS_TOMOVE(uio->uio_resid, pmp);
argsize = sizeof(struct puffs_vnreq_read);
read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO);
error = 0;
while (uio->uio_resid > 0) {
read_argp->pvnr_ioflag = ap->a_ioflag;
read_argp->pvnr_resid = tomove;
read_argp->pvnr_offset = uio->uio_offset;
puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred);
argsize = sizeof(struct puffs_vnreq_read);
error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ,
(void **)&read_argp, &argsize,
sizeof(struct puffs_vnreq_read), VPTOPNC(ap->a_vp),
ap->a_vp, NULL);
if (error)
break;
if (read_argp->pvnr_resid > tomove) {
error = EINVAL;
break;
}
error = uiomove(read_argp->pvnr_data,
tomove - read_argp->pvnr_resid, uio);
/*
* in case the file is out of juice, resid from
* userspace is != 0. and the error-case is
* quite obvious
*/
if (error || read_argp->pvnr_resid)
break;
tomove = PUFFS_TOMOVE(uio->uio_resid, pmp);
}
}
if (read_argp)
free(read_argp, M_PUFFS);
return error;
}
int
puffs_write(void *v)
{
struct vop_write_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
kauth_cred_t a_cred;
}<7D>*/ *ap = v;
struct puffs_vnreq_write *write_argp;
struct puffs_mount *pmp;
struct uio *uio;
struct vnode *vp;
void *win;
size_t tomove, argsize;
off_t oldoff, newoff, origoff;
vsize_t bytelen;
int error, uflags;
int async, ubcflags;
vp = ap->a_vp;
uio = ap->a_uio;
async = vp->v_mount->mnt_flag & MNT_ASYNC;
error = uflags = 0;
write_argp = NULL;
pmp = MPTOPUFFSMP(ap->a_vp->v_mount);
if (vp->v_type == VREG && (pmp->pmp_flags & PUFFSFLAG_NOCACHE) == 0) {
ubcflags = 0;
if (UBC_WANT_UNMAP(vp))
ubcflags = UBC_UNMAP;
/*
* userspace *should* be allowed to control this,
* but with UBC it's a bit unclear how to handle it
*/
if (ap->a_ioflag & IO_APPEND)
uio->uio_offset = vp->v_size;
origoff = uio->uio_offset;
while (uio->uio_resid > 0) {
uflags |= PUFFS_UPDATECTIME;
uflags |= PUFFS_UPDATEMTIME;
oldoff = uio->uio_offset;
bytelen = uio->uio_resid;
win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen,
UVM_ADV_NORMAL, UBC_WRITE);
error = uiomove(win, bytelen, uio);
/*
* did we grow the file?
* XXX: should probably ask userspace to extend
* it's idea of the *first* before growing it
* here. Or we need some mechanism to "rollback"
* in case putpages fails.
*/
newoff = oldoff + bytelen;
if (vp->v_size < newoff) {
uflags |= PUFFS_UPDATESIZE;
uvm_vnp_setsize(vp, newoff);
/*
* in case we couldn't copy data to the
* window, zero it out so that we don't
* have any random leftovers in there.
*/
if (error)
memset(win, 0, bytelen);
}
ubc_release(win, ubcflags);
if (error)
break;
/* ok, I really need to admit: why's this? */
if (!async && oldoff >> 16 != uio->uio_offset >> 16) {
simple_lock(&vp->v_interlock);
error = VOP_PUTPAGES(vp, oldoff & ~0xffff,
uio->uio_offset & ~0xffff, PGO_CLEANIT);
if (error)
break;
}
}
if (error == 0 && ap->a_ioflag & IO_SYNC) {
simple_lock(&vp->v_interlock);
error = VOP_PUTPAGES(vp, trunc_page(origoff),
round_page(uio->uio_offset),
PGO_CLEANIT | PGO_SYNCIO);
}
puffs_updatenode(vp, uflags);
} else {
tomove = PUFFS_TOMOVE(uio->uio_resid, pmp);
argsize = sizeof(struct puffs_vnreq_write) + tomove;
write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO);
while (uio->uio_resid > 0) {
write_argp->pvnr_ioflag = ap->a_ioflag;
write_argp->pvnr_resid = tomove;
write_argp->pvnr_offset = uio->uio_offset;
puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred);
error = uiomove(write_argp->pvnr_data, tomove, uio);
if (error)
break;
error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount),
PUFFS_VN_WRITE, write_argp, argsize,
VPTOPNC(ap->a_vp), ap->a_vp, NULL);
if (error) {
/* restore uiomove */
uio->uio_resid += tomove;
uio->uio_offset -= tomove;
break;
}
if (write_argp->pvnr_resid > tomove) {
/*
* XXX: correct file size is a mystery,
* we can only guess
*/
error = EINVAL;
break;
}
/* adjust file size */
uvm_vnp_setsize(vp, uio->uio_offset);
/* didn't move everything? bad userspace. bail */
if (write_argp->pvnr_resid != 0) {
uio->uio_resid += write_argp->pvnr_resid;
uio->uio_offset -= write_argp->pvnr_resid;
error = EIO;
break;
}
tomove = PUFFS_TOMOVE(uio->uio_resid, pmp);
}
}
if (write_argp)
free(write_argp, M_PUFFS);
return error;
}
static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int);
#define FCNIOCTL_ARG_MAX 1<<16
int
puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop)
{
/* struct vop_ioctl_args {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
u_long a_command;
void *a_data;
int a_fflag;
kauth_cred_t a_cred;
struct lwp *a_l;
}<7D>*ap = v; */
struct puffs_mount *pmp;
struct puffs_sizepark pspark;
void *kernbuf;
size_t copylen;
int error;
PUFFS_VNREQ(fcnioctl);
/*
* Since this op gives the filesystem (almost) complete control on
* how much it is allowed to copy from the calling process
* address space, do not enable it by default, since it would
* be a whopping security hole.
*/
pmp = MPTOPUFFSMP(ap->a_vp->v_mount);
if ((pmp->pmp_flags & PUFFSFLAG_ALLOWCTL) == 0)
return EINVAL; /* only shoe that fits */
/* fill in sizereq and store it */
pspark.pkso_reqid = puffs_getreqid(pmp);
pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN;
pspark.pkso_copybuf = ap->a_data;
pspark.pkso_bufsize = FCNIOCTL_ARG_MAX;
TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries);
/* then fill in actual request and shoot it off */
fcnioctl_arg.pvnr_command = ap->a_command;
fcnioctl_arg.pvnr_fflag = ap->a_fflag;
puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred);
fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l);
error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop,
&fcnioctl_arg, sizeof(fcnioctl_arg), VPTOPNC(ap->a_vp),
pspark.pkso_reqid, NULL, NULL);
/* if we don't need to copy data, we're done */
if (error || !fcnioctl_arg.pvnr_copyback)
return error;
copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen);
kernbuf = malloc(copylen, M_PUFFS, M_WAITOK);
error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen);
if (error)
goto out;
error = copyout(kernbuf, ap->a_data, copylen);
out:
free(kernbuf, M_PUFFS);
return error;
}
int
puffs_ioctl(void *v)
{
return puffs_fcnioctl(v, PUFFS_VN_IOCTL);
}
int
puffs_fcntl(void *v)
{
return puffs_fcnioctl(v, PUFFS_VN_FCNTL);
}
int
puffs_print(void *v)
{
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
struct puffs_node *pn = vp->v_data;
PUFFS_VNREQ(print);
/* kernel portion */
printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n"
" userspace cookie: %p\n", vp, pn, pn->pn_cookie);
if (vp->v_type == VFIFO)
fifo_printinfo(vp);
lockmgr_printinfo(&vp->v_lock);
/* userspace portion */
return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_PRINT,
&print_arg, sizeof(print_arg), VPTOPNC(ap->a_vp),
LOCKEDVP(ap->a_vp), NULL);
}
int
puffs_pathconf(void *v)
{
struct vop_pathconf_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_name;
register_t *a_retval;
} */ *ap = v;
int error;
PUFFS_VNREQ(pathconf);
pathconf_arg.pvnr_name = ap->a_name;
error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount),
PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg),
VPTOPNC(ap->a_vp), ap->a_vp, NULL);
if (error)
return error;
*ap->a_retval = pathconf_arg.pvnr_retval;
return 0;
}
int
puffs_advlock(void *v)
{
struct vop_advlock_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
void *a_id;
int a_op;
struct flock *a_fl;
int a_flags;
} */ *ap = v;
int error;
PUFFS_VNREQ(advlock);
error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock));
if (error)
return error;
advlock_arg.pvnr_id = ap->a_id;
advlock_arg.pvnr_op = ap->a_op;
advlock_arg.pvnr_flags = ap->a_flags;
return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK,
&advlock_arg, sizeof(advlock_arg), VPTOPNC(ap->a_vp), NULL, NULL);
}
/*
* This maps itself to PUFFS_VN_READ/WRITE for data transfer.
*/
int
puffs_strategy(void *v)
{
struct vop_strategy_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
struct buf *a_bp;
} */ *ap = v;
struct puffs_mount *pmp;
struct puffs_vnreq_read *read_argp = NULL;
struct puffs_vnreq_write *write_argp = NULL;
struct buf *bp;
size_t argsize;
size_t tomove, moved;
int error;
pmp = MPTOPUFFSMP(ap->a_vp->v_mount);
bp = ap->a_bp;
#ifdef DIAGNOSTIC
if (bp->b_resid > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX)
panic("puffs_strategy: wildly inappropriate buf resid %d",
bp->b_resid);
#endif
if (bp->b_flags & B_READ) {
argsize = sizeof(struct puffs_vnreq_read);
read_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO);
if (read_argp == NULL) {
error = ENOMEM;
goto out;
}
tomove = PUFFS_TOMOVE(bp->b_resid, pmp);
read_argp->pvnr_ioflag = 0;
read_argp->pvnr_resid = tomove;
read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT;
puffs_credcvt(&read_argp->pvnr_cred, FSCRED);
error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ,
(void **)&read_argp, &argsize, argsize,
VPTOPNC(ap->a_vp), LOCKEDVP(ap->a_vp), NULL);
if (error)
goto out;
if (read_argp->pvnr_resid > tomove) {
error = EINVAL;
goto out;
}
moved = tomove - read_argp->pvnr_resid;
(void)memcpy(bp->b_data, read_argp->pvnr_data, moved);
bp->b_resid -= moved;
} else {
argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount;
write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO);
if (write_argp == NULL) {
error = ENOMEM;
goto out;
}
tomove = PUFFS_TOMOVE(bp->b_resid, pmp);
write_argp->pvnr_ioflag = 0;
write_argp->pvnr_resid = tomove;
write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT;
puffs_credcvt(&write_argp->pvnr_cred, FSCRED);
(void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove);
error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount),
PUFFS_VN_WRITE, write_argp, argsize,
VPTOPNC(ap->a_vp), ap->a_vp, NULL);
if (error)
goto out;
moved = write_argp->pvnr_resid - tomove;
if (write_argp->pvnr_resid > tomove) {
error = EINVAL;
goto out;
}
bp->b_resid -= moved;
if (write_argp->pvnr_resid != 0)
error = EIO;
}
out:
if (read_argp)
free(read_argp, M_PUFFS);
if (write_argp)
free(write_argp, M_PUFFS);
biodone(ap->a_bp);
return error;
}
/*
* The rest don't get a free trip to userspace and back, they
* have to stay within the kernel.
*/
/*
* bmap doesn't really make any sense for puffs, so just 1:1 map it.
* well, maybe somehow, somewhere, some day ....
*/
int
puffs_bmap(void *v)
{
struct vop_bmap_args /* {
const struct vnodeop_desc *a_desc;
struct vnode *a_vp;
daddr_t a_bn;
struct vnode **a_vpp;
daddr_t *a_bnp;
int *a_runp;
} */ *ap = v;
struct puffs_mount *pmp;
pmp = MPTOPUFFSMP(ap->a_vp->v_mount);
if (ap->a_vpp)
*ap->a_vpp = ap->a_vp;
if (ap->a_bnp)
*ap->a_bnp = ap->a_bn;
if (ap->a_runp)
*ap->a_runp = pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX;
return 0;
}
/*
* moreXXX: yes, todo
*/
int
puffs_lock(void *v)
{
struct vop_lock_args /* {
struct vnode *a_vp;
int a_flags;
}<7D>*/ *ap = v;
struct vnode *vp = ap->a_vp;
#if 0
DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags));
#endif
return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock);
}
int
puffs_unlock(void *v)
{
struct vop_unlock_args /* {
struct vnode *a_vp;
int a_flags;
} */ *ap = v;
struct vnode *vp = ap->a_vp;
#if 0
DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags));
#endif
return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock);
}
int
puffs_islocked(void *v)
{
struct vop_islocked_args *ap = v;
int rv;
rv = lockstatus(&ap->a_vp->v_lock);
return rv;
}
int
puffs_mmap(void *v)
{
struct vop_mmap_args *ap = v;
struct puffs_mount *pmp;
pmp = MPTOPUFFSMP(ap->a_vp->v_mount);
if (pmp->pmp_flags & PUFFSFLAG_NOCACHE)
return genfs_eopnotsupp(v);
return genfs_mmap(v);
}
int
puffs_generic(void *v)
{
struct vop_generic_args *ap = v;
(void)ap;
DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name));
return EOPNOTSUPP;
}
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