static int
puffs_vnop_advlock(struct vop_advlock_args *ap)
{
PUFFS_MSG_VARS(vn, advlock);
struct vnode *vp = ap->a_vp;
struct puffs_node *pn = VPTOPP(vp);
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
int error;
if (!EXISTSOP(pmp, ADVLOCK))
return lf_advlock(ap, &pn->pn_lockf, vp->v_filesize);
PUFFS_MSG_ALLOC(vn, advlock);
(void)memcpy(&advlock_msg->pvnr_fl, ap->a_fl,
sizeof(advlock_msg->pvnr_fl));
advlock_msg->pvnr_id = ap->a_id;
advlock_msg->pvnr_op = ap->a_op;
advlock_msg->pvnr_flags = ap->a_flags;
puffs_msg_setinfo(park_advlock, PUFFSOP_VN,
PUFFS_VN_ADVLOCK, VPTOPNC(vp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error);
error = checkerr(pmp, error, __func__);
PUFFS_MSG_RELEASE(advlock);
return error;
}
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_print(struct vop_print_args *ap)
{
PUFFS_MSG_VARS(vn, print);
struct vnode *vp = ap->a_vp;
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
struct puffs_node *pn = VPTOPP(vp);
int error;
/* kernel portion */
kprintf("tag VT_PUFFS, vnode %p, puffs node: %p,\n"
"\tuserspace cookie: %p", vp, pn, pn->pn_cookie);
if (vp->v_type == VFIFO)
fifo_printinfo(vp);
kprintf("\n");
/* userspace portion */
if (EXISTSOP(pmp, PRINT)) {
PUFFS_MSG_ALLOC(vn, print);
puffs_msg_setinfo(park_print, PUFFSOP_VN,
PUFFS_VN_PRINT, VPTOPNC(vp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data,
NULL, error);
PUFFS_MSG_RELEASE(print);
}
return 0;
}
/*
* XXX: can't use callremove now because can't catch setbacks with
* it due to lack of a pnode argument.
*/
static int
puffs_vnop_remove(struct vop_nremove_args *ap)
{
PUFFS_MSG_VARS(vn, remove);
struct vnode *dvp = ap->a_dvp;
struct vnode *vp;
struct puffs_node *dpn = VPTOPP(dvp);
struct puffs_node *pn;
struct nchandle *nch = ap->a_nch;
struct namecache *ncp = nch->ncp;
struct ucred *cred = ap->a_cred;
struct mount *mp = dvp->v_mount;
struct puffs_mount *pmp = MPTOPUFFSMP(mp);
int error;
if (!EXISTSOP(pmp, REMOVE))
return EOPNOTSUPP;
error = vget(dvp, LK_EXCLUSIVE);
if (error != 0) {
DPRINTF(("puffs_vnop_remove: EAGAIN on parent vnode %p %s\n",
dvp, ncp->nc_name));
return EAGAIN;
}
error = cache_vget(nch, cred, LK_EXCLUSIVE, &vp);
if (error != 0) {
DPRINTF(("puffs_vnop_remove: cache_vget error: %p %s\n",
dvp, ncp->nc_name));
return EAGAIN;
}
if (vp->v_type == VDIR) {
error = EISDIR;
goto out;
}
pn = VPTOPP(vp);
PUFFS_MSG_ALLOC(vn, remove);
remove_msg->pvnr_cookie_targ = VPTOPNC(vp);
puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred,
ncp, cred);
puffs_msg_setinfo(park_remove, PUFFSOP_VN,
PUFFS_VN_REMOVE, VPTOPNC(dvp));
puffs_msg_enqueue(pmp, park_remove);
error = puffs_msg_wait2(pmp, park_remove, dpn, pn);
PUFFS_MSG_RELEASE(remove);
error = checkerr(pmp, error, __func__);
out:
vput(dvp);
vn_unlock(vp);
if (error == 0)
cache_unlink(nch);
vrele(vp);
return error;
}
static int
puffs_vnop_mknod(struct vop_nmknod_args *ap)
{
PUFFS_MSG_VARS(vn, mknod);
struct vnode *dvp = ap->a_dvp;
struct vattr *vap = ap->a_vap;
struct puffs_node *dpn = VPTOPP(dvp);
struct nchandle *nch = ap->a_nch;
struct namecache *ncp = nch->ncp;
struct ucred *cred = ap->a_cred;
struct mount *mp = dvp->v_mount;
struct puffs_mount *pmp = MPTOPUFFSMP(mp);
int error;
if (!EXISTSOP(pmp, MKNOD))
return EOPNOTSUPP;
DPRINTF(("puffs_mknod: dvp %p, name: %s\n",
dvp, ncp->nc_name));
if (vap->va_type != VFIFO)
return EINVAL;
if ((error = vget(dvp, LK_EXCLUSIVE)) != 0) {
DPRINTF(("puffs_vnop_mknod: EAGAIN on ncp %p %s\n",
ncp, ncp->nc_name));
return EAGAIN;
}
PUFFS_MSG_ALLOC(vn, mknod);
puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred,
ncp, cred);
mknod_msg->pvnr_va = *ap->a_vap;
puffs_msg_setinfo(park_mknod, PUFFSOP_VN,
PUFFS_VN_MKNOD, VPTOPNC(dvp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error);
error = checkerr(pmp, error, __func__);
if (error)
goto out;
error = puffs_newnode(mp, dvp, ap->a_vpp,
mknod_msg->pvnr_newnode, vap->va_type);
if (error)
puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie,
mknod_msg->pvnr_newnode, ncp, cred);
out:
vput(dvp);
if (!error) {
cache_setunresolved(nch);
cache_setvp(nch, *ap->a_vpp);
}
PUFFS_MSG_RELEASE(mknod);
return error;
}
static int
puffs_vnop_link(struct vop_nlink_args *ap)
{
PUFFS_MSG_VARS(vn, link);
struct vnode *dvp = ap->a_dvp;
struct vnode *vp = ap->a_vp;
struct puffs_node *dpn = VPTOPP(dvp);
struct puffs_node *pn = VPTOPP(vp);
struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount);
struct nchandle *nch = ap->a_nch;
struct namecache *ncp = nch->ncp;
struct ucred *cred = ap->a_cred;
int error;
if (!EXISTSOP(pmp, LINK))
return EOPNOTSUPP;
if (vp->v_mount != dvp->v_mount)
return EXDEV;
if ((error = vget(dvp, LK_EXCLUSIVE)) != 0) {
DPRINTF(("puffs_vnop_link: EAGAIN on ncp %p %s\n",
ncp, ncp->nc_name));
return EAGAIN;
}
PUFFS_MSG_ALLOC(vn, link);
link_msg->pvnr_cookie_targ = VPTOPNC(vp);
puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred,
ncp, cred);
puffs_msg_setinfo(park_link, PUFFSOP_VN,
PUFFS_VN_LINK, VPTOPNC(dvp));
puffs_msg_enqueue(pmp, park_link);
error = puffs_msg_wait2(pmp, park_link, dpn, pn);
PUFFS_MSG_RELEASE(link);
error = checkerr(pmp, error, __func__);
/*
* XXX: stay in touch with the cache. I don't like this, but
* don't have a better solution either. See also puffs_rename().
*/
if (error == 0) {
puffs_updatenode(pn, PUFFS_UPDATECTIME);
}
vput(dvp);
if (error == 0) {
cache_setunresolved(nch);
cache_setvp(nch, vp);
}
return error;
}
static int
puffs_vnop_symlink(struct vop_nsymlink_args *ap)
{
PUFFS_MSG_VARS(vn, symlink);
struct vnode *dvp = ap->a_dvp;
struct puffs_node *dpn = VPTOPP(dvp);
struct mount *mp = dvp->v_mount;
struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount);
struct nchandle *nch = ap->a_nch;
struct namecache *ncp = nch->ncp;
struct ucred *cred = ap->a_cred;
int error;
if (!EXISTSOP(pmp, SYMLINK))
return EOPNOTSUPP;
if ((error = vget(dvp, LK_EXCLUSIVE)) != 0) {
DPRINTF(("puffs_vnop_symlink: EAGAIN on ncp %p %s\n",
ncp, ncp->nc_name));
return EAGAIN;
}
*ap->a_vpp = NULL;
PUFFS_MSG_ALLOC(vn, symlink);
puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred,
ncp, cred);
symlink_msg->pvnr_va = *ap->a_vap;
(void)strlcpy(symlink_msg->pvnr_link, ap->a_target,
sizeof(symlink_msg->pvnr_link));
puffs_msg_setinfo(park_symlink, PUFFSOP_VN,
PUFFS_VN_SYMLINK, VPTOPNC(dvp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error);
error = checkerr(pmp, error, __func__);
if (error)
goto out;
error = puffs_newnode(mp, dvp, ap->a_vpp,
symlink_msg->pvnr_newnode, VLNK);
if (error)
puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie,
symlink_msg->pvnr_newnode, ncp, cred);
out:
vput(dvp);
PUFFS_MSG_RELEASE(symlink);
if (!error) {
cache_setunresolved(nch);
cache_setvp(nch, *ap->a_vpp);
}
return error;
}
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;
}
static void
callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck)
{
PUFFS_MSG_VARS(vn, reclaim);
if (!EXISTSOP(pmp, RECLAIM))
return;
PUFFS_MSG_ALLOC(vn, reclaim);
puffs_msg_setfaf(park_reclaim);
puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck);
puffs_msg_enqueue(pmp, park_reclaim);
PUFFS_MSG_RELEASE(reclaim);
}
static void
callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag)
{
int error;
PUFFS_MSG_VARS(vn, inactive);
if (doinact(pmp, iaflag)) {
PUFFS_MSG_ALLOC(vn, inactive);
puffs_msg_setinfo(park_inactive, PUFFSOP_VN,
PUFFS_VN_INACTIVE, ck);
PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error);
PUFFS_MSG_RELEASE(inactive);
}
}
void
puffs_senderr(struct puffs_mount *pmp, int type, int error,
const char *str, puffs_cookie_t ck)
{
struct puffs_msgpark *park;
struct puffs_error *perr;
puffs_msgmem_alloc(sizeof(struct puffs_error), &park, (void *)&perr, 1);
puffs_msg_setfaf(park);
puffs_msg_setinfo(park, PUFFSOP_ERROR, type, ck);
perr->perr_error = error;
strlcpy(perr->perr_str, str, sizeof(perr->perr_str));
puffs_msg_enqueue(pmp, park);
puffs_msgmem_release(park);
}
static int
callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck,
struct namecache *ncp, struct ucred *cred)
{
PUFFS_MSG_VARS(vn, remove);
int error;
PUFFS_MSG_ALLOC(vn, remove);
remove_msg->pvnr_cookie_targ = ck;
puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred,
ncp, cred);
puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck);
PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error);
PUFFS_MSG_RELEASE(remove);
return checkerr(pmp, error, __func__);
}
static int
puffs_vnop_fsync(struct vop_fsync_args *ap)
{
PUFFS_MSG_VARS(vn, fsync);
struct vnode *vp = ap->a_vp;
int waitfor = ap->a_waitfor;
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
struct puffs_node *pn = VPTOPP(vp);
int error, dofaf;
error = flushvncache(vp, waitfor);
if (error)
return error;
/*
* HELLO! We exit already here if the user server does not
* support fsync OR if we should call fsync for a node which
* has references neither in the kernel or the fs server.
* Otherwise we continue to issue fsync() forward.
*/
if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING))
return 0;
dofaf = (waitfor & MNT_WAIT) == 0 || (waitfor & MNT_LAZY) != 0;
PUFFS_MSG_ALLOC(vn, fsync);
if (dofaf)
puffs_msg_setfaf(park_fsync);
fsync_msg->pvnr_flags = ap->a_flags;
puffs_msg_setinfo(park_fsync, PUFFSOP_VN,
PUFFS_VN_FSYNC, VPTOPNC(vp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error);
PUFFS_MSG_RELEASE(fsync);
error = checkerr(pmp, error, __func__);
return error;
}
static int
puffs_vnop_close(struct vop_close_args *ap)
{
PUFFS_MSG_VARS(vn, close);
struct vnode *vp = ap->a_vp;
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
vn_lock(vp, LK_UPGRADE | LK_RETRY);
if (!EXISTSOP(pmp, CLOSE))
return vop_stdclose(ap);
PUFFS_MSG_ALLOC(vn, close);
puffs_msg_setfaf(park_close);
close_msg->pvnr_fflag = ap->a_fflag;
puffs_msg_setinfo(park_close, PUFFSOP_VN,
PUFFS_VN_CLOSE, VPTOPNC(vp));
puffs_msg_enqueue(pmp, park_close);
PUFFS_MSG_RELEASE(close);
return vop_stdclose(ap);
}
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_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_pathconf(struct vop_pathconf_args *ap)
{
PUFFS_MSG_VARS(vn, pathconf);
struct vnode *vp = ap->a_vp;
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
int error;
if (!EXISTSOP(pmp, PATHCONF))
return EOPNOTSUPP;
PUFFS_MSG_ALLOC(vn, pathconf);
pathconf_msg->pvnr_name = ap->a_name;
puffs_msg_setinfo(park_pathconf, PUFFSOP_VN,
PUFFS_VN_PATHCONF, VPTOPNC(vp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error);
error = checkerr(pmp, error, __func__);
if (!error)
*ap->a_retval = pathconf_msg->pvnr_retval;
PUFFS_MSG_RELEASE(pathconf);
return error;
}
/* XXX: callinactive can't setback */
static int
puffs_vnop_inactive(struct vop_inactive_args *ap)
{
PUFFS_MSG_VARS(vn, inactive);
struct vnode *vp = ap->a_vp;
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
struct puffs_node *pnode = VPTOPP(vp);
flushvncache(vp, MNT_NOWAIT);
if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) {
/*
* do not wait for reply from userspace, otherwise it may
* deadlock.
*/
PUFFS_MSG_ALLOC(vn, inactive);
puffs_msg_setfaf(park_inactive);
puffs_msg_setinfo(park_inactive, PUFFSOP_VN,
PUFFS_VN_INACTIVE, VPTOPNC(vp));
puffs_msg_enqueue(pmp, park_inactive);
PUFFS_MSG_RELEASE(inactive);
}
pnode->pn_stat &= ~PNODE_DOINACT;
/*
* file server thinks it's gone? then don't be afraid care,
* node's life was already all it would ever be
*/
if (pnode->pn_stat & PNODE_NOREFS) {
pnode->pn_stat |= PNODE_DYING;
vrecycle(vp);
}
return 0;
}
/*
* Begin vnode operations.
*
* A word from the keymaster about locks: generally we don't want
* to use the vnode locks at all: it creates an ugly dependency between
* the userlandia file server and the kernel. But we'll play along with
* the kernel vnode locks for now. However, even currently we attempt
* to release locks as early as possible. This is possible for some
* operations which a) don't need a locked vnode after the userspace op
* and b) return with the vnode unlocked. Theoretically we could
* unlock-do op-lock for others and order the graph in userspace, but I
* don't want to think of the consequences for the time being.
*/
static int
puffs_vnop_lookup(struct vop_nresolve_args *ap)
{
PUFFS_MSG_VARS(vn, lookup);
struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount);
struct nchandle *nch = ap->a_nch;
struct namecache *ncp = nch->ncp;
struct ucred *cred = ap->a_cred;
struct vnode *vp = NULL, *dvp = ap->a_dvp;
struct puffs_node *dpn;
int error;
DPRINTF(("puffs_lookup: \"%s\", parent vnode %p\n",
ncp->nc_name, dvp));
PUFFS_MSG_ALLOC(vn, lookup);
puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred,
ncp, cred);
puffs_msg_setinfo(park_lookup, PUFFSOP_VN,
PUFFS_VN_LOOKUP, VPTOPNC(dvp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error);
DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error));
if (error) {
error = checkerr(pmp, error, __func__);
if (error == ENOENT)
cache_setvp(nch, NULL);
goto out;
}
/*
* Check that we don't get our parent node back, that would cause
* a pretty obvious deadlock.
*/
dpn = VPTOPP(dvp);
if (lookup_msg->pvnr_newnode == dpn->pn_cookie) {
puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL,
"lookup produced parent cookie", lookup_msg->pvnr_newnode);
error = EPROTO;
goto out;
}
error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 1, &vp);
if (error == PUFFS_NOSUCHCOOKIE) {
error = puffs_getvnode(dvp->v_mount,
lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype,
lookup_msg->pvnr_size, &vp);
if (error) {
puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp),
lookup_msg->pvnr_newnode, ncp, cred);
goto out;
}
} else if (error) {
puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp),
lookup_msg->pvnr_newnode, ncp, cred);
goto out;
}
out:
if (!error && vp != NULL) {
vn_unlock(vp);
cache_setvp(nch, vp);
vrele(vp);
}
DPRINTF(("puffs_lookup: returning %d\n", error));
PUFFS_MSG_RELEASE(lookup);
return error;
}
int
puffs_directread(struct vnode *vp, struct uio *uio, int ioflag,
struct ucred *cred)
{
PUFFS_MSG_VARS(vn, read);
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
size_t tomove, argsize;
int error;
KKASSERT(vp->v_type == VREG);
if (uio->uio_offset < 0)
return EINVAL;
if (uio->uio_resid == 0)
return 0;
read_msg = NULL;
error = 0;
/* std sanity */
if (uio->uio_resid == 0)
return 0;
if (uio->uio_offset < 0)
return EINVAL;
/*
* 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_vnmsg_read);
puffs_msgmem_alloc(argsize + tomove, &park_read,
(void *)&read_msg, 1);
error = 0;
while (uio->uio_resid > 0) {
tomove = PUFFS_TOMOVE(uio->uio_resid, pmp);
memset(read_msg, 0, argsize); /* XXX: touser KASSERT */
RWARGS(read_msg, ioflag, tomove,
uio->uio_offset, cred);
puffs_msg_setinfo(park_read, PUFFSOP_VN,
PUFFS_VN_READ, VPTOPNC(vp));
puffs_msg_setdelta(park_read, tomove);
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data,
NULL, error);
error = checkerr(pmp, error, __func__);
if (error)
break;
if (read_msg->pvnr_resid > tomove) {
puffs_senderr(pmp, PUFFS_ERR_READ,
E2BIG, "resid grew", VPTOPNC(vp));
error = EPROTO;
break;
}
error = uiomove(read_msg->pvnr_data,
tomove - read_msg->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_msg->pvnr_resid)
break;
}
puffs_msgmem_release(park_read);
return error;
}
int
puffs_directwrite(struct vnode *vp, struct uio *uio, int ioflag,
struct ucred *cred)
{
PUFFS_MSG_VARS(vn, write);
struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount);
size_t tomove, argsize;
int error, uflags;
KKASSERT(vp->v_type == VREG);
if (uio->uio_offset < 0)
return EINVAL;
if (uio->uio_resid == 0)
return 0;
error = uflags = 0;
write_msg = NULL;
/* tomove is non-increasing */
tomove = PUFFS_TOMOVE(uio->uio_resid, pmp);
argsize = sizeof(struct puffs_vnmsg_write) + tomove;
puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1);
while (uio->uio_resid > 0) {
/* move data to buffer */
tomove = PUFFS_TOMOVE(uio->uio_resid, pmp);
memset(write_msg, 0, argsize); /* XXX: touser KASSERT */
RWARGS(write_msg, ioflag, tomove,
uio->uio_offset, cred);
error = uiomove(write_msg->pvnr_data, tomove, uio);
if (error)
break;
/* move buffer to userspace */
puffs_msg_setinfo(park_write, PUFFSOP_VN,
PUFFS_VN_WRITE, VPTOPNC(vp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data,
NULL, error);
error = checkerr(pmp, error, __func__);
if (error)
break;
if (write_msg->pvnr_resid > tomove) {
puffs_senderr(pmp, PUFFS_ERR_WRITE,
E2BIG, "resid grew", VPTOPNC(vp));
error = EPROTO;
break;
}
if (PUFFS_USE_PAGECACHE(pmp))
KKASSERT(vp->v_filesize >= uio->uio_offset);
/* didn't move everything? bad userspace. bail */
if (write_msg->pvnr_resid != 0) {
error = EIO;
break;
}
}
puffs_msgmem_release(park_write);
return error;
}
static int
puffs_vnop_rename(struct vop_nrename_args *ap)
{
PUFFS_MSG_VARS(vn, rename);
struct nchandle *fnch = ap->a_fnch;
struct nchandle *tnch = ap->a_tnch;
struct vnode *fdvp = ap->a_fdvp;
struct vnode *fvp = fnch->ncp->nc_vp;
struct vnode *tdvp = ap->a_tdvp;
struct vnode *tvp = tnch->ncp->nc_vp;
struct ucred *cred = ap->a_cred;
struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount);
int error;
if (!EXISTSOP(pmp, RENAME))
return EOPNOTSUPP;
error = vget(tdvp, LK_EXCLUSIVE);
if (error != 0) {
DPRINTF(("puffs_vnop_rename: EAGAIN on tdvp vnode %p %s\n",
tdvp, tnch->ncp->nc_name));
return EAGAIN;
}
if (tvp != NULL) {
error = vget(tvp, LK_EXCLUSIVE);
if (error != 0) {
DPRINTF(("puffs_vnop_rename: EAGAIN on tvp vnode %p %s\n",
tvp, tnch->ncp->nc_name));
vput(tdvp);
return EAGAIN;
}
}
if ((fvp->v_mount != tdvp->v_mount) ||
(tvp && (fvp->v_mount != tvp->v_mount))) {
error = EXDEV;
goto out;
}
if (tvp) {
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
error = ENOTDIR;
goto out;
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
error = EISDIR;
goto out;
}
}
PUFFS_MSG_ALLOC(vn, rename);
rename_msg->pvnr_cookie_src = VPTOPNC(fvp);
rename_msg->pvnr_cookie_targdir = VPTOPNC(tdvp);
if (tvp)
rename_msg->pvnr_cookie_targ = VPTOPNC(tvp);
else
rename_msg->pvnr_cookie_targ = NULL;
puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred,
fnch->ncp, cred);
puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred,
tnch->ncp, cred);
puffs_msg_setinfo(park_rename, PUFFSOP_VN,
PUFFS_VN_RENAME, VPTOPNC(fdvp));
PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error);
PUFFS_MSG_RELEASE(rename);
error = checkerr(pmp, error, __func__);
if (error == 0)
puffs_updatenode(VPTOPP(fvp), PUFFS_UPDATECTIME);
out:
if (tvp != NULL)
vn_unlock(tvp);
if (tdvp != tvp)
vn_unlock(tdvp);
if (error == 0)
cache_rename(fnch, tnch);
if (tvp != NULL)
vrele(tvp);
vrele(tdvp);
return error;
}
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;
}
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;
}