static int
puffs_vnop_open(struct vop_open_args *ap)
{
PUFFS_MSG_VARS(vn, open);
struct vnode *vp = ap->a_vp;
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
int mode = ap->a_mode;
int error;
DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode));
if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE))
ERROUT(EROFS);
if (!EXISTSOP(pmp, OPEN))
ERROUT(0);
PUFFS_MSG_ALLOC(vn, open);
open_msg->pvnr_mode = mode;
puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred);
puffs_msg_setinfo(park_open, PUFFSOP_VN,
PUFFS_VN_OPEN, VPTOPNC(vp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error);
error = checkerr(pmp, error, __func__);
out:
DPRINTF(("puffs_open: returning %d\n", error));
PUFFS_MSG_RELEASE(open);
if (error)
return error;
return vop_stdopen(ap);
}
static int
puffs_vnop_getattr(struct vop_getattr_args *ap)
{
PUFFS_MSG_VARS(vn, getattr);
struct vnode *vp = ap->a_vp;
struct mount *mp = vp->v_mount;
struct puffs_mount *pmp = MPTOPUFFSMP(mp);
struct vattr *vap, *rvap;
struct puffs_node *pn = VPTOPP(vp);
int error = 0;
if (vp->v_type == VBLK || vp->v_type == VCHR)
return ENOTSUP;
vap = ap->a_vap;
PUFFS_MSG_ALLOC(vn, getattr);
vattr_null(&getattr_msg->pvnr_va);
puffs_credcvt(&getattr_msg->pvnr_cred, curproc->p_ucred);
puffs_msg_setinfo(park_getattr, PUFFSOP_VN,
PUFFS_VN_GETATTR, VPTOPNC(vp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error);
error = checkerr(pmp, error, __func__);
if (error)
goto out;
rvap = &getattr_msg->pvnr_va;
(void) memcpy(vap, rvap, sizeof(struct vattr));
vap->va_fsid = mp->mnt_stat.f_fsid.val[0];
if (pn->pn_stat & PNODE_METACACHE_ATIME)
vap->va_atime = pn->pn_mc_atime;
if (pn->pn_stat & PNODE_METACACHE_CTIME)
vap->va_ctime = pn->pn_mc_ctime;
if (pn->pn_stat & PNODE_METACACHE_MTIME)
vap->va_mtime = pn->pn_mc_mtime;
if (pn->pn_stat & PNODE_METACACHE_SIZE) {
vap->va_size = pn->pn_mc_size;
} else {
if (rvap->va_size != VNOVAL
&& vp->v_type != VBLK && vp->v_type != VCHR) {
pn->pn_serversize = rvap->va_size;
if (vp->v_type == VREG)
puffs_meta_setsize(vp, rvap->va_size, 0);
}
}
out:
PUFFS_MSG_RELEASE(getattr);
return error;
}
void
puffs_makecn(struct puffs_kcn *pkcn, struct puffs_kcred *pkcr,
const struct componentname *cn, int full)
{
pkcn->pkcn_nameiop = cn->cn_nameiop;
pkcn->pkcn_flags = cn->cn_flags;
if (full) {
(void)strcpy(pkcn->pkcn_name, cn->cn_nameptr);
} else {
(void)memcpy(pkcn->pkcn_name, cn->cn_nameptr, cn->cn_namelen);
pkcn->pkcn_name[cn->cn_namelen] = '\0';
}
pkcn->pkcn_namelen = cn->cn_namelen;
pkcn->pkcn_consume = 0;
puffs_credcvt(pkcr, cn->cn_cred);
}
static int
puffs_vnop_access(struct vop_access_args *ap)
{
PUFFS_MSG_VARS(vn, access);
struct vnode *vp = ap->a_vp;
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
int mode = ap->a_mode;
int error;
if (mode & VWRITE) {
switch (vp->v_type) {
case VDIR:
case VLNK:
case VREG:
if ((vp->v_mount->mnt_flag & MNT_RDONLY)
|| !EXISTSOP(pmp, WRITE))
return EROFS;
break;
default:
break;
}
}
if (!EXISTSOP(pmp, ACCESS))
return 0;
PUFFS_MSG_ALLOC(vn, access);
access_msg->pvnr_mode = ap->a_mode;
puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred);
puffs_msg_setinfo(park_access, PUFFSOP_VN,
PUFFS_VN_ACCESS, VPTOPNC(vp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error);
error = checkerr(pmp, error, __func__);
PUFFS_MSG_RELEASE(access);
return error;
}
static int
puffs_vnop_readlink(struct vop_readlink_args *ap)
{
PUFFS_MSG_VARS(vn, readlink);
struct vnode *vp = ap->a_vp;
struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount);
size_t linklen;
int error;
if (!EXISTSOP(pmp, READLINK))
return EOPNOTSUPP;
PUFFS_MSG_ALLOC(vn, readlink);
puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred);
linklen = sizeof(readlink_msg->pvnr_link);
readlink_msg->pvnr_linklen = linklen;
puffs_msg_setinfo(park_readlink, PUFFSOP_VN,
PUFFS_VN_READLINK, VPTOPNC(vp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error);
error = checkerr(pmp, error, __func__);
if (error)
goto out;
/* bad bad user file server */
if (readlink_msg->pvnr_linklen > linklen) {
puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG,
"linklen too big", VPTOPNC(ap->a_vp));
error = EPROTO;
goto out;
}
error = uiomove(readlink_msg->pvnr_link, readlink_msg->pvnr_linklen,
ap->a_uio);
out:
PUFFS_MSG_RELEASE(readlink);
return error;
}
static int
puffs_vnop_readdir(struct vop_readdir_args *ap)
{
PUFFS_MSG_VARS(vn, readdir);
struct vnode *vp = ap->a_vp;
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
size_t argsize, tomove, cookiemem, cookiesmax;
struct uio *uio = ap->a_uio;
size_t howmuch, resid;
int error;
if (!EXISTSOP(pmp, READDIR))
return EOPNOTSUPP;
/*
* ok, so we need: resid + cookiemem = maxreq
* => resid + cookiesize * (resid/minsize) = maxreq
* => resid + cookiesize/minsize * resid = maxreq
* => (cookiesize/minsize + 1) * resid = maxreq
* => resid = maxreq / (cookiesize/minsize + 1)
*
* Since cookiesize <= minsize and we're not very big on floats,
* we approximate that to be 1. Therefore:
*
* resid = maxreq / 2;
*
* Well, at least we didn't have to use differential equations
* or the Gram-Schmidt process.
*
* (yes, I'm very afraid of this)
*/
KKASSERT(CSIZE <= _DIRENT_RECLEN(1));
if (ap->a_cookies) {
KKASSERT(ap->a_ncookies != NULL);
if (pmp->pmp_args.pa_fhsize == 0)
return EOPNOTSUPP;
resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2;
cookiesmax = resid/_DIRENT_RECLEN(1);
cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */
} else {
resid = PUFFS_TOMOVE(uio->uio_resid, pmp);
cookiesmax = 0;
cookiemem = 0;
}
argsize = sizeof(struct puffs_vnmsg_readdir);
tomove = resid + cookiemem;
puffs_msgmem_alloc(argsize + tomove, &park_readdir,
(void *)&readdir_msg, 1);
puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred);
readdir_msg->pvnr_offset = uio->uio_offset;
readdir_msg->pvnr_resid = resid;
readdir_msg->pvnr_ncookies = cookiesmax;
readdir_msg->pvnr_eofflag = 0;
readdir_msg->pvnr_dentoff = cookiemem;
puffs_msg_setinfo(park_readdir, PUFFSOP_VN,
PUFFS_VN_READDIR, VPTOPNC(vp));
puffs_msg_setdelta(park_readdir, tomove);
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error);
error = checkerr(pmp, error, __func__);
if (error)
goto out;
/* userspace is cheating? */
if (readdir_msg->pvnr_resid > resid) {
puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG,
"resid grew", VPTOPNC(vp));
ERROUT(EPROTO);
}
if (readdir_msg->pvnr_ncookies > cookiesmax) {
puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG,
"too many cookies", VPTOPNC(vp));
ERROUT(EPROTO);
}
/* check eof */
if (readdir_msg->pvnr_eofflag)
*ap->a_eofflag = 1;
/* bouncy-wouncy with the directory data */
howmuch = resid - readdir_msg->pvnr_resid;
/* force eof if no data was returned (getcwd() needs this) */
if (howmuch == 0) {
*ap->a_eofflag = 1;
goto out;
}
error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio);
if (error)
goto out;
/* provide cookies to caller if so desired */
if (ap->a_cookies) {
*ap->a_cookies = kmalloc(readdir_msg->pvnr_ncookies*CSIZE,
M_TEMP, M_WAITOK);
*ap->a_ncookies = readdir_msg->pvnr_ncookies;
memcpy(*ap->a_cookies, readdir_msg->pvnr_data,
*ap->a_ncookies*CSIZE);
}
/* next readdir starts here */
uio->uio_offset = readdir_msg->pvnr_offset;
out:
puffs_msgmem_release(park_readdir);
return error;
}
static int
dosetattr(struct vnode *vp, struct vattr *vap, struct ucred *cred, int flags)
{
PUFFS_MSG_VARS(vn, setattr);
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
struct puffs_node *pn = VPTOPP(vp);
int error = 0;
if ((vp->v_mount->mnt_flag & MNT_RDONLY) &&
(vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL
|| vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL
|| vap->va_mode != (mode_t)VNOVAL))
return EROFS;
if ((vp->v_mount->mnt_flag & MNT_RDONLY)
&& vp->v_type == VREG && vap->va_size != VNOVAL)
return EROFS;
/*
* Flush metacache first. If we are called with some explicit
* parameters, treat them as information overriding metacache
* information.
*/
if (pn->pn_stat & PNODE_METACACHE_MASK) {
if ((pn->pn_stat & PNODE_METACACHE_ATIME)
&& vap->va_atime.tv_sec == VNOVAL)
vap->va_atime = pn->pn_mc_atime;
if ((pn->pn_stat & PNODE_METACACHE_CTIME)
&& vap->va_ctime.tv_sec == VNOVAL)
vap->va_ctime = pn->pn_mc_ctime;
if ((pn->pn_stat & PNODE_METACACHE_MTIME)
&& vap->va_mtime.tv_sec == VNOVAL)
vap->va_mtime = pn->pn_mc_mtime;
if ((pn->pn_stat & PNODE_METACACHE_SIZE)
&& vap->va_size == VNOVAL)
vap->va_size = pn->pn_mc_size;
pn->pn_stat &= ~PNODE_METACACHE_MASK;
}
PUFFS_MSG_ALLOC(vn, setattr);
(void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr));
puffs_credcvt(&setattr_msg->pvnr_cred, cred);
puffs_msg_setinfo(park_setattr, PUFFSOP_VN,
PUFFS_VN_SETATTR, VPTOPNC(vp));
if (flags & SETATTR_ASYNC)
puffs_msg_setfaf(park_setattr);
puffs_msg_enqueue(pmp, park_setattr);
if ((flags & SETATTR_ASYNC) == 0)
error = puffs_msg_wait2(pmp, park_setattr, vp->v_data, NULL);
PUFFS_MSG_RELEASE(setattr);
if ((flags & SETATTR_ASYNC) == 0) {
error = checkerr(pmp, error, __func__);
if (error)
return error;
} else {
error = 0;
}
if (vap->va_size != VNOVAL) {
pn->pn_serversize = vap->va_size;
if (flags & SETATTR_CHSIZE)
puffs_meta_setsize(vp, vap->va_size, 0);
}
return 0;
}
static int
puffs_vnop_lookupdotdot(struct vop_nlookupdotdot_args *ap)
{
PUFFS_MSG_VARS(vn, lookupdotdot);
struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount);
struct ucred *cred = ap->a_cred;
struct vnode *vp, *dvp = ap->a_dvp;
struct puffs_node *dpn;
int error;
*ap->a_vpp = NULL;
DPRINTF(("puffs_lookupdotdot: vnode %p\n", dvp));
PUFFS_MSG_ALLOC(vn, lookupdotdot);
puffs_credcvt(&lookupdotdot_msg->pvnr_cred, cred);
puffs_msg_setinfo(park_lookupdotdot, PUFFSOP_VN,
PUFFS_VN_LOOKUPDOTDOT, VPTOPNC(dvp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookupdotdot, dvp->v_data, NULL,
error);
DPRINTF(("puffs_lookupdotdot: return of the userspace, part %d\n",
error));
if (error) {
error = checkerr(pmp, error, __func__);
goto out;
}
/*
* Check that we don't get our node back, that would cause
* a pretty obvious deadlock.
*/
dpn = VPTOPP(dvp);
if (lookupdotdot_msg->pvnr_newnode == dpn->pn_cookie) {
puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL,
"lookupdotdot produced the same cookie",
lookupdotdot_msg->pvnr_newnode);
error = EPROTO;
goto out;
}
error = puffs_cookie2vnode(pmp, lookupdotdot_msg->pvnr_newnode,
1, &vp);
if (error == PUFFS_NOSUCHCOOKIE) {
error = puffs_getvnode(dvp->v_mount,
lookupdotdot_msg->pvnr_newnode, VDIR, 0, &vp);
if (error) {
puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp),
lookupdotdot_msg->pvnr_newnode, NULL, cred);
goto out;
}
} else if (error) {
puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp),
lookupdotdot_msg->pvnr_newnode, NULL, cred);
goto out;
}
*ap->a_vpp = vp;
vn_unlock(vp);
out:
DPRINTF(("puffs_lookupdotdot: returning %d %p\n", error, *ap->a_vpp));
PUFFS_MSG_RELEASE(lookupdotdot);
return error;
}
