int
fuse_vncache_lookup(vnode_t dvp, vnode_t *vpp, struct componentname *cnp)
{
#if M_OSXFUSE_ENABLE_BIG_LOCK
/*
* Make sure that biglock is actually held by the thread calling us before
* trying to unlock it. fuse_vncache_lookup is called by notification
* handlers that do not hold biglock. Trying to unlock it in this case would
* result in a kernel panic.
*/
struct fuse_data *data = fuse_get_mpdata(vnode_mount(dvp));
bool biglock_locked = fuse_biglock_have_lock(data->biglock);
if (biglock_locked) {
fuse_biglock_unlock(data->biglock);
}
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
int ret = cache_lookup(dvp, vpp, cnp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
if (biglock_locked) {
fuse_biglock_lock(data->biglock);
}
#endif
#if FUSE_TRACE_VNCACHE
IOLog("osxfuse: cache lookup ret=%d, dvp=%p, *vpp=%p, %s\n",
ret, dvp, *vpp, cnp->cn_nameptr);
#endif
return ret;
}
static int
fuse_vfsop_root(struct mount *mp, int lkflags, struct vnode **vpp)
{
struct fuse_data *data = fuse_get_mpdata(mp);
int err = 0;
if (data->vroot != NULL) {
err = vget(data->vroot, lkflags, curthread);
if (err == 0)
*vpp = data->vroot;
} else {
err = fuse_vnode_get(mp, FUSE_ROOT_ID, NULL, vpp, NULL, VDIR);
if (err == 0) {
FUSE_LOCK();
MPASS(data->vroot == NULL || data->vroot == *vpp);
if (data->vroot == NULL) {
FS_DEBUG("new root vnode\n");
data->vroot = *vpp;
FUSE_UNLOCK();
vref(*vpp);
} else if (data->vroot != *vpp) {
FS_DEBUG("root vnode race\n");
FUSE_UNLOCK();
VOP_UNLOCK(*vpp, 0);
vrele(*vpp);
vrecycle(*vpp);
*vpp = data->vroot;
} else
FUSE_UNLOCK();
}
}
return err;
}
static errno_t
fuse_vfsop_root(mount_t mp, struct vnode **vpp, vfs_context_t context)
{
int err = 0;
vnode_t vp = NULLVP;
struct fuse_entry_out feo_root;
struct fuse_data *data = fuse_get_mpdata(mp);
fuse_trace_printf_vfsop();
if (data->rootvp != NULLVP) {
*vpp = data->rootvp;
return vnode_get(*vpp);
}
bzero(&feo_root, sizeof(feo_root));
feo_root.nodeid = FUSE_ROOT_ID;
feo_root.generation = 0;
feo_root.attr.ino = FUSE_ROOT_ID;
feo_root.attr.size = FUSE_ROOT_SIZE;
feo_root.attr.mode = VTTOIF(VDIR);
err = FSNodeGetOrCreateFileVNodeByID(&vp, FN_IS_ROOT, &feo_root, mp,
NULLVP /* dvp */, context,
NULL /* oflags */);
*vpp = vp;
if (!err) {
data->rootvp = *vpp;
}
return err;
}
int
fuse_filehandle_put(vnode_t vp, vfs_context_t context, fufh_type_t fufh_type,
fuse_op_waitfor_t waitfor)
{
struct fuse_data *data;
struct fuse_dispatcher fdi;
struct fuse_abi_data fri;
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_filehandle *fufh = NULL;
int err = 0;
int op = FUSE_RELEASE;
fuse_trace_printf("fuse_filehandle_put(vp=%p, fufh_type=%d)\n",
vp, fufh_type);
fufh = &(fvdat->fufh[fufh_type]);
if (FUFH_IS_VALID(fufh)) {
panic("osxfuse: filehandle_put called on a valid fufh (type=%d)",
fufh_type);
/* NOTREACHED */
}
if (fuse_isdeadfs(vp)) {
goto out;
}
data = fuse_get_mpdata(vnode_mount(vp));
if (vnode_isdir(vp)) {
op = FUSE_RELEASEDIR;
}
fdisp_init_abi(&fdi, fuse_release_in, data);
fdisp_make_vp(&fdi, op, vp, context);
fuse_abi_data_init(&fri, DATOI(data), fdi.indata);
fuse_release_in_set_fh(&fri, fufh->fh_id);
fuse_release_in_set_flags(&fri, fufh->open_flags);
if (waitfor == FUSE_OP_FOREGROUNDED) {
err = fdisp_wait_answ(&fdi);
if (err) {
goto out;
}
} else {
fuse_insert_message(fdi.tick);
}
fuse_ticket_release(fdi.tick);
out:
FUSE_OSAddAtomic(-1, (SInt32 *)&fuse_fh_current);
fuse_invalidate_attr(vp);
return err;
}
static int
fuse_sync_callback(vnode_t vp, void *cargs)
{
int type;
struct fuse_sync_cargs *args;
struct fuse_vnode_data *fvdat;
struct fuse_filehandle *fufh;
struct fuse_data *data;
mount_t mp;
if (!vnode_hasdirtyblks(vp)) {
return VNODE_RETURNED;
}
mp = vnode_mount(vp);
if (fuse_isdeadfs_mp(mp)) {
return VNODE_RETURNED_DONE;
}
data = fuse_get_mpdata(mp);
if (!fuse_implemented(data, (vnode_isdir(vp)) ?
FSESS_NOIMPLBIT(FSYNCDIR) : FSESS_NOIMPLBIT(FSYNC))) {
return VNODE_RETURNED;
}
args = (struct fuse_sync_cargs *)cargs;
fvdat = VTOFUD(vp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(data->biglock);
#endif
cluster_push(vp, 0);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(data->biglock);
#endif
for (type = 0; type < FUFH_MAXTYPE; type++) {
fufh = &(fvdat->fufh[type]);
if (FUFH_IS_VALID(fufh)) {
(void)fuse_internal_fsync_fh(vp, args->context, fufh,
FUSE_OP_FOREGROUNDED);
}
}
/*
* In general:
*
* - can use vnode_isinuse() if the need be
* - vnode and UBC are in lock-step
* - note that umount will call ubc_sync_range()
*/
return VNODE_RETURNED;
}
__private_extern__
int
fuse_internal_readdir(vnode_t vp,
uio_t uio,
vfs_context_t context,
struct fuse_filehandle *fufh,
struct fuse_iov *cookediov,
int *numdirent)
{
int err = 0;
struct fuse_dispatcher fdi;
struct fuse_read_in *fri;
struct fuse_data *data;
if (uio_resid(uio) == 0) {
return 0;
}
fdisp_init(&fdi, 0);
/* Note that we DO NOT have a UIO_SYSSPACE here (so no need for p2p I/O). */
while (uio_resid(uio) > 0) {
fdi.iosize = sizeof(*fri);
fdisp_make_vp(&fdi, FUSE_READDIR, vp, context);
fri = fdi.indata;
fri->fh = fufh->fh_id;
fri->offset = uio_offset(uio);
data = fuse_get_mpdata(vnode_mount(vp));
fri->size = (typeof(fri->size))min((size_t)uio_resid(uio), data->iosize);
if ((err = fdisp_wait_answ(&fdi))) {
goto out;
}
if ((err = fuse_internal_readdir_processdata(vp,
uio,
fri->size,
fdi.answ,
fdi.iosize,
cookediov,
numdirent))) {
break;
}
}
/* done: */
fuse_ticket_drop(fdi.tick);
out:
return ((err == -1) ? 0 : err);
}
static errno_t
fuse_vfsop_sync(mount_t mp, int waitfor, vfs_context_t context)
{
uint64_t mntflags;
struct fuse_sync_cargs args;
int allerror = 0;
fuse_trace_printf_vfsop();
mntflags = vfs_flags(mp);
if (fuse_isdeadfs_mp(mp)) {
return 0;
}
if (vfs_isupdate(mp)) {
return 0;
}
if (vfs_isrdonly(mp)) {
return EROFS; // should panic!?
}
/*
* Write back each (modified) fuse node.
*/
args.context = context;
args.waitfor = waitfor;
args.error = 0;
#if M_FUSE4X_ENABLE_BIGLOCK
struct fuse_data *data = fuse_get_mpdata(mp);
fuse_biglock_unlock(data->biglock);
#endif
vnode_iterate(mp, 0, fuse_sync_callback, (void *)&args);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_lock(data->biglock);
#endif
if (args.error) {
allerror = args.error;
}
/*
* For other types of stale file system information, such as:
*
* - fs control info
* - quota information
* - modified superblock
*/
return allerror;
}
static int
fuse_read_directbackend(struct vnode *vp, struct uio *uio,
struct ucred *cred, struct fuse_filehandle *fufh)
{
struct fuse_dispatcher fdi;
struct fuse_read_in *fri;
int err = 0;
if (uio->uio_resid == 0)
return (0);
fdisp_init(&fdi, 0);
/*
* XXX In "normal" case we use an intermediate kernel buffer for
* transmitting data from daemon's context to ours. Eventually, we should
* get rid of this. Anyway, if the target uio lives in sysspace (we are
* called from pageops), and the input data doesn't need kernel-side
* processing (we are not called from readdir) we can already invoke
* an optimized, "peer-to-peer" I/O routine.
*/
while (uio->uio_resid > 0) {
fdi.iosize = sizeof(*fri);
fdisp_make_vp(&fdi, FUSE_READ, vp, uio->uio_td, cred);
fri = fdi.indata;
fri->fh = fufh->fh_id;
fri->offset = uio->uio_offset;
fri->size = MIN(uio->uio_resid,
fuse_get_mpdata(vp->v_mount)->max_read);
FS_DEBUG2G("fri->fh %ju, fri->offset %ju, fri->size %ju\n",
(uintmax_t)fri->fh, (uintmax_t)fri->offset,
(uintmax_t)fri->size);
if ((err = fdisp_wait_answ(&fdi)))
goto out;
FS_DEBUG2G("complete: got iosize=%d, requested fri.size=%zd; "
"resid=%zd offset=%ju\n",
fri->size, fdi.iosize, uio->uio_resid,
(uintmax_t)uio->uio_offset);
if ((err = uiomove(fdi.answ, MIN(fri->size, fdi.iosize), uio)))
break;
if (fdi.iosize < fri->size)
break;
}
out:
fdisp_destroy(&fdi);
return (err);
}
static int
fuse_write_directbackend(struct vnode *vp, struct uio *uio,
struct ucred *cred, struct fuse_filehandle *fufh, int ioflag)
{
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_write_in *fwi;
struct fuse_dispatcher fdi;
size_t chunksize;
int diff;
int err = 0;
if (uio->uio_resid == 0)
return (0);
if (ioflag & IO_APPEND)
uio_setoffset(uio, fvdat->filesize);
fdisp_init(&fdi, 0);
while (uio->uio_resid > 0) {
chunksize = MIN(uio->uio_resid,
fuse_get_mpdata(vp->v_mount)->max_write);
fdi.iosize = sizeof(*fwi) + chunksize;
fdisp_make_vp(&fdi, FUSE_WRITE, vp, uio->uio_td, cred);
fwi = fdi.indata;
fwi->fh = fufh->fh_id;
fwi->offset = uio->uio_offset;
fwi->size = chunksize;
if ((err = uiomove((char *)fdi.indata + sizeof(*fwi),
chunksize, uio)))
break;
if ((err = fdisp_wait_answ(&fdi)))
break;
diff = chunksize - ((struct fuse_write_out *)fdi.answ)->size;
if (diff < 0) {
err = EINVAL;
break;
}
uio->uio_resid += diff;
uio->uio_offset -= diff;
if (uio->uio_offset > fvdat->filesize)
fuse_vnode_setsize(vp, cred, uio->uio_offset);
}
fdisp_destroy(&fdi);
return (err);
}
static int
fuse_sync_callback(vnode_t vp, void *cargs)
{
int type;
struct fuse_sync_cargs *args;
struct fuse_vnode_data *fvdat;
struct fuse_dispatcher fdi;
struct fuse_filehandle *fufh;
struct fuse_data *data;
mount_t mp;
if (!vnode_hasdirtyblks(vp)) {
return VNODE_RETURNED;
}
mp = vnode_mount(vp);
if (fuse_isdeadfs(vp)) {
return VNODE_RETURNED_DONE;
}
data = fuse_get_mpdata(mp);
if (!fuse_implemented(data, (vnode_isdir(vp)) ?
FSESS_NOIMPLBIT(FSYNCDIR) : FSESS_NOIMPLBIT(FSYNC))) {
return VNODE_RETURNED;
}
args = (struct fuse_sync_cargs *)cargs;
fvdat = VTOFUD(vp);
cluster_push(vp, 0);
fuse_dispatcher_init(&fdi, 0);
for (type = 0; type < FUFH_MAXTYPE; type++) {
fufh = &(fvdat->fufh[type]);
if (FUFH_IS_VALID(fufh)) {
(void)fuse_internal_fsync(vp, args->context, fufh, &fdi);
}
}
/*
* In general:
*
* - can use vnode_isinuse() if the need be
* - vnode and UBC are in lock-step
* - note that umount will call ubc_sync_range()
*/
return VNODE_RETURNED;
}
__inline__
int
fuse_vncache_lookup(vnode_t dvp, vnode_t *vpp, struct componentname *cnp)
{
#if M_OSXFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_OSXFUSE_ENABLE_HUGE_LOCK
struct fuse_data *data = fuse_get_mpdata(vnode_mount(dvp));
fuse_biglock_unlock(data->biglock);
#endif
int ret = cache_lookup(dvp, vpp, cnp);
#if M_OSXFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_OSXFUSE_ENABLE_HUGE_LOCK
fuse_biglock_lock(data->biglock);
#endif
#if FUSE_TRACE_VNCACHE
IOLog("OSXFUSE: cache lookup ret=%d, dvp=%p, *vpp=%p, %s\n",
ret, dvp, *vpp, cnp->cn_nameptr);
#endif
return ret;
}
void
fuse_vncache_enter(vnode_t dvp, vnode_t vp, struct componentname *cnp)
{
#if FUSE_TRACE_VNCACHE
IOLog("osxfuse: cache enter dvp=%p, vp=%p, %s\n", dvp, vp, cnp->cn_nameptr);
#endif
#if M_OSXFUSE_ENABLE_BIG_LOCK
struct fuse_data *data = fuse_get_mpdata(vnode_mount(dvp));
bool biglock_locked = fuse_biglock_have_lock(data->biglock);
if (biglock_locked) {
fuse_biglock_unlock(data->biglock);
}
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
cache_enter(dvp, vp, cnp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
if (biglock_locked) {
fuse_biglock_lock(data->biglock);
}
#endif
}
void
fuse_vncache_purge(vnode_t vp)
{
#if FUSE_TRACE_VNCACHE
IOLog("osxfuse: cache purge vp=%p\n", vp);
#endif
#if M_OSXFUSE_ENABLE_BIG_LOCK
struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
bool biglock_locked = fuse_biglock_have_lock(data->biglock);
if (biglock_locked) {
fuse_biglock_unlock(data->biglock);
}
#endif /* M_OSXFUSE_ENABLE_BIG_LOCK */
cache_purge(vp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
if (biglock_locked) {
fuse_biglock_lock(data->biglock);
}
#endif
}
__private_extern__
int
fuse_setextendedsecurity(mount_t mp, int state)
{
int err = EINVAL;
struct fuse_data *data;
data = fuse_get_mpdata(mp);
if (!data) {
return ENXIO;
}
if (state == 1) {
/* Turning on extended security. */
if ((data->dataflags & FSESS_NO_VNCACHE) ||
(data->dataflags & FSESS_DEFER_PERMISSIONS)) {
return EINVAL;
}
data->dataflags |= (FSESS_EXTENDED_SECURITY |
FSESS_DEFAULT_PERMISSIONS);;
if (vfs_authopaque(mp)) {
vfs_clearauthopaque(mp);
}
if (vfs_authopaqueaccess(mp)) {
vfs_clearauthopaqueaccess(mp);
}
vfs_setextendedsecurity(mp);
err = 0;
} else if (state == 0) {
/* Turning off extended security. */
data->dataflags &= ~FSESS_EXTENDED_SECURITY;
vfs_clearextendedsecurity(mp);
err = 0;
}
return err;
}
/*
struct vnop_access_args {
struct vnode *a_vp;
#if VOP_ACCESS_TAKES_ACCMODE_T
accmode_t a_accmode;
#else
int a_mode;
#endif
struct ucred *a_cred;
struct thread *a_td;
};
*/
static int
fuse_vnop_access(struct vop_access_args *ap)
{
struct vnode *vp = ap->a_vp;
int accmode = ap->a_accmode;
struct ucred *cred = ap->a_cred;
struct fuse_access_param facp;
struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
int err;
FS_DEBUG2G("inode=%ju\n", (uintmax_t)VTOI(vp));
if (fuse_isdeadfs(vp)) {
if (vnode_isvroot(vp)) {
return 0;
}
return ENXIO;
}
if (!(data->dataflags & FSESS_INITED)) {
if (vnode_isvroot(vp)) {
if (priv_check_cred(cred, PRIV_VFS_ADMIN, 0) ||
(fuse_match_cred(data->daemoncred, cred) == 0)) {
return 0;
}
}
return EBADF;
}
if (vnode_islnk(vp)) {
return 0;
}
bzero(&facp, sizeof(facp));
err = fuse_internal_access(vp, accmode, &facp, ap->a_td, ap->a_cred);
FS_DEBUG2G("err=%d accmode=0x%x\n", err, accmode);
return err;
}
/*
struct vnop_readlink_args {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
};
*/
static int
fuse_vnop_readlink(struct vop_readlink_args *ap)
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
struct ucred *cred = ap->a_cred;
struct fuse_dispatcher fdi;
int err;
FS_DEBUG2G("inode=%ju\n", (uintmax_t)VTOI(vp));
if (fuse_isdeadfs(vp)) {
return ENXIO;
}
if (!vnode_islnk(vp)) {
return EINVAL;
}
fdisp_init(&fdi, 0);
err = fdisp_simple_putget_vp(&fdi, FUSE_READLINK, vp, curthread, cred);
if (err) {
goto out;
}
if (((char *)fdi.answ)[0] == '/' &&
fuse_get_mpdata(vnode_mount(vp))->dataflags & FSESS_PUSH_SYMLINKS_IN) {
char *mpth = vnode_mount(vp)->mnt_stat.f_mntonname;
err = uiomove(mpth, strlen(mpth), uio);
}
if (!err) {
err = uiomove(fdi.answ, fdi.iosize, uio);
}
out:
fdisp_destroy(&fdi);
return err;
}
void
fdisp_make_pid(struct fuse_dispatcher *fdip,
enum fuse_opcode op,
struct mount *mp,
uint64_t nid,
pid_t pid,
struct ucred *cred)
{
struct fuse_data *data = fuse_get_mpdata(mp);
debug_printf("fdip=%p, op=%d, mp=%p, nid=%ju\n",
fdip, op, mp, (uintmax_t)nid);
if (fdip->tick) {
fticket_refresh(fdip->tick);
} else {
fdip->tick = fuse_ticket_fetch(data);
}
FUSE_DIMALLOC(&fdip->tick->tk_ms_fiov, fdip->finh,
fdip->indata, fdip->iosize);
fuse_setup_ihead(fdip->finh, fdip->tick, nid, op, fdip->iosize, pid, cred);
}
static errno_t
fuse_vfsop_setattr(mount_t mp, struct vfs_attr *fsap, vfs_context_t context)
{
int error = 0;
fuse_trace_printf_vfsop();
kauth_cred_t cred = vfs_context_ucred(context);
if (!fuse_vfs_context_issuser(context) &&
(kauth_cred_getuid(cred) != vfs_statfs(mp)->f_owner)) {
return EACCES;
}
struct fuse_data *data = fuse_get_mpdata(mp);
if (VFSATTR_IS_ACTIVE(fsap, f_vol_name)) {
if (!fuse_implemented(data, FSESS_NOIMPLBIT(SETVOLNAME))) {
error = ENOTSUP;
goto out;
}
if (fsap->f_vol_name[0] == 0) {
error = EINVAL;
goto out;
}
size_t namelen = strlen(fsap->f_vol_name);
if (namelen >= MAXPATHLEN) {
error = ENAMETOOLONG;
goto out;
}
vnode_t root_vp;
error = fuse_vfsop_root(mp, &root_vp, context);
if (error) {
goto out;
}
struct fuse_dispatcher fdi;
fdisp_init(&fdi, namelen + 1);
fdisp_make_vp(&fdi, FUSE_SETVOLNAME, root_vp, context);
memcpy((char *)fdi.indata, fsap->f_vol_name, namelen);
((char *)fdi.indata)[namelen] = '\0';
if (!(error = fdisp_wait_answ(&fdi))) {
fuse_ticket_drop(fdi.tick);
}
(void)vnode_put(root_vp);
if (error) {
if (error == ENOSYS) {
error = ENOTSUP;
fuse_clear_implemented(data, FSESS_NOIMPLBIT(SETVOLNAME));
}
goto out;
}
copystr(fsap->f_vol_name, data->volname, MAXPATHLEN - 1, &namelen);
bzero(data->volname + namelen, MAXPATHLEN - namelen);
VFSATTR_SET_SUPPORTED(fsap, f_vol_name);
}
out:
return error;
}
static int
fuse_vfsop_statfs(struct mount *mp, struct statfs *sbp)
{
struct fuse_dispatcher fdi;
int err = 0;
struct fuse_statfs_out *fsfo;
struct fuse_data *data;
FS_DEBUG2G("mp %p: %s\n", mp, mp->mnt_stat.f_mntfromname);
data = fuse_get_mpdata(mp);
if (!(data->dataflags & FSESS_INITED))
goto fake;
fdisp_init(&fdi, 0);
fdisp_make(&fdi, FUSE_STATFS, mp, FUSE_ROOT_ID, NULL, NULL);
err = fdisp_wait_answ(&fdi);
if (err) {
fdisp_destroy(&fdi);
if (err == ENOTCONN) {
/*
* We want to seem a legitimate fs even if the daemon
* is stiff dead... (so that, eg., we can still do path
* based unmounting after the daemon dies).
*/
goto fake;
}
return err;
}
fsfo = fdi.answ;
sbp->f_blocks = fsfo->st.blocks;
sbp->f_bfree = fsfo->st.bfree;
sbp->f_bavail = fsfo->st.bavail;
sbp->f_files = fsfo->st.files;
sbp->f_ffree = fsfo->st.ffree; /* cast from uint64_t to int64_t */
sbp->f_namemax = fsfo->st.namelen;
sbp->f_bsize = fsfo->st.frsize; /* cast from uint32_t to uint64_t */
FS_DEBUG("fuse_statfs_out -- blocks: %llu, bfree: %llu, bavail: %llu, "
"fil es: %llu, ffree: %llu, bsize: %i, namelen: %i\n",
(unsigned long long)fsfo->st.blocks,
(unsigned long long)fsfo->st.bfree,
(unsigned long long)fsfo->st.bavail,
(unsigned long long)fsfo->st.files,
(unsigned long long)fsfo->st.ffree, fsfo->st.bsize,
fsfo->st.namelen);
fdisp_destroy(&fdi);
return 0;
fake:
sbp->f_blocks = 0;
sbp->f_bfree = 0;
sbp->f_bavail = 0;
sbp->f_files = 0;
sbp->f_ffree = 0;
sbp->f_namemax = 0;
sbp->f_bsize = FUSE_DEFAULT_BLOCKSIZE;
return 0;
}
/*
struct vnop_rename_args {
struct vnode *a_fdvp;
struct vnode *a_fvp;
struct componentname *a_fcnp;
struct vnode *a_tdvp;
struct vnode *a_tvp;
struct componentname *a_tcnp;
};
*/
static int
fuse_vnop_rename(struct vop_rename_args *ap)
{
struct vnode *fdvp = ap->a_fdvp;
struct vnode *fvp = ap->a_fvp;
struct componentname *fcnp = ap->a_fcnp;
struct vnode *tdvp = ap->a_tdvp;
struct vnode *tvp = ap->a_tvp;
struct componentname *tcnp = ap->a_tcnp;
struct fuse_data *data;
int err = 0;
FS_DEBUG2G("from: inode=%ju name=%*s -> to: inode=%ju name=%*s\n",
(uintmax_t)VTOI(fvp), (int)fcnp->cn_namelen, fcnp->cn_nameptr,
(uintmax_t)(tvp == NULL ? -1 : VTOI(tvp)),
(int)tcnp->cn_namelen, tcnp->cn_nameptr);
if (fuse_isdeadfs(fdvp)) {
return ENXIO;
}
if (fvp->v_mount != tdvp->v_mount ||
(tvp && fvp->v_mount != tvp->v_mount)) {
FS_DEBUG("cross-device rename: %s -> %s\n",
fcnp->cn_nameptr, (tcnp != NULL ? tcnp->cn_nameptr : "(NULL)"));
err = EXDEV;
goto out;
}
cache_purge(fvp);
/*
* FUSE library is expected to check if target directory is not
* under the source directory in the file system tree.
* Linux performs this check at VFS level.
*/
data = fuse_get_mpdata(vnode_mount(tdvp));
sx_xlock(&data->rename_lock);
err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp);
if (err == 0) {
if (tdvp != fdvp)
fuse_vnode_setparent(fvp, tdvp);
if (tvp != NULL)
fuse_vnode_setparent(tvp, NULL);
}
sx_unlock(&data->rename_lock);
if (tvp != NULL && tvp != fvp) {
cache_purge(tvp);
}
if (vnode_isdir(fvp)) {
if ((tvp != NULL) && vnode_isdir(tvp)) {
cache_purge(tdvp);
}
cache_purge(fdvp);
}
out:
if (tdvp == tvp) {
vrele(tdvp);
} else {
vput(tdvp);
}
if (tvp != NULL) {
vput(tvp);
}
vrele(fdvp);
vrele(fvp);
return err;
}
__private_extern__
int
fuse_internal_strategy(vnode_t vp, buf_t bp)
{
size_t biosize;
size_t chunksize;
size_t respsize;
int mapped = FALSE;
int mode;
int op;
int vtype = vnode_vtype(vp);
int err = 0;
caddr_t bufdat;
off_t left;
off_t offset;
int32_t bflags = buf_flags(bp);
fufh_type_t fufh_type;
struct fuse_dispatcher fdi;
struct fuse_data *data;
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_filehandle *fufh = NULL;
mount_t mp = vnode_mount(vp);
data = fuse_get_mpdata(mp);
biosize = data->blocksize;
if (!(vtype == VREG || vtype == VDIR)) {
return ENOTSUP;
}
if (bflags & B_READ) {
mode = FREAD;
fufh_type = FUFH_RDONLY; /* FUFH_RDWR will also do */
} else {
mode = FWRITE;
fufh_type = FUFH_WRONLY; /* FUFH_RDWR will also do */
}
if (fvdat->flag & FN_CREATING) {
fuse_lck_mtx_lock(fvdat->createlock);
if (fvdat->flag & FN_CREATING) {
(void)fuse_msleep(fvdat->creator, fvdat->createlock,
PDROP | PINOD | PCATCH, "fuse_internal_strategy",
NULL);
} else {
fuse_lck_mtx_unlock(fvdat->createlock);
}
}
fufh = &(fvdat->fufh[fufh_type]);
if (!FUFH_IS_VALID(fufh)) {
fufh_type = FUFH_RDWR;
fufh = &(fvdat->fufh[fufh_type]);
if (!FUFH_IS_VALID(fufh)) {
fufh = NULL;
} else {
/* We've successfully fallen back to FUFH_RDWR. */
}
}
if (!fufh) {
if (mode == FREAD) {
fufh_type = FUFH_RDONLY;
} else {
fufh_type = FUFH_RDWR;
}
/*
* Lets NOT do the filehandle preflight check here.
*/
err = fuse_filehandle_get(vp, NULL, fufh_type, 0 /* mode */);
if (!err) {
fufh = &(fvdat->fufh[fufh_type]);
FUFH_AUX_INC(fufh);
/* We've created a NEW fufh of type fufh_type. open_count is 1. */
}
} else { /* good fufh */
FUSE_OSAddAtomic(1, (SInt32 *)&fuse_fh_reuse_count);
/* We're using an existing fufh of type fufh_type. */
}
if (err) {
/* A more typical error case. */
if ((err == ENOTCONN) || fuse_isdeadfs(vp)) {
buf_seterror(bp, EIO);
buf_biodone(bp);
return EIO;
}
IOLog("MacFUSE: strategy failed to get fh "
"(vtype=%d, fufh_type=%d, err=%d)\n", vtype, fufh_type, err);
if (!vfs_issynchronous(mp)) {
IOLog("MacFUSE: asynchronous write failed!\n");
}
buf_seterror(bp, EIO);
buf_biodone(bp);
return EIO;
}
if (!fufh) {
panic("MacFUSE: tried everything but still no fufh");
/* NOTREACHED */
}
#define B_INVAL 0x00040000 /* Does not contain valid info. */
#define B_ERROR 0x00080000 /* I/O error occurred. */
if (bflags & B_INVAL) {
IOLog("MacFUSE: buffer does not contain valid information\n");
}
if (bflags & B_ERROR) {
IOLog("MacFUSE: an I/O error has occured\n");
}
if (buf_count(bp) == 0) {
return 0;
}
fdisp_init(&fdi, 0);
if (mode == FREAD) {
struct fuse_read_in *fri;
buf_setresid(bp, buf_count(bp));
offset = (off_t)((off_t)buf_blkno(bp) * biosize);
if (offset >= fvdat->filesize) {
/* Trying to read at/after EOF? */
if (offset != fvdat->filesize) {
/* Trying to read after EOF? */
buf_seterror(bp, EINVAL);
}
buf_biodone(bp);
return 0;
}
/* Note that we just made sure that offset < fvdat->filesize. */
if ((offset + buf_count(bp)) > fvdat->filesize) {
/* Trimming read */
buf_setcount(bp, (uint32_t)(fvdat->filesize - offset));
}
if (buf_map(bp, &bufdat)) {
IOLog("MacFUSE: failed to map buffer in strategy\n");
return EFAULT;
} else {
mapped = TRUE;
}
while (buf_resid(bp) > 0) {
chunksize = min((size_t)buf_resid(bp), data->iosize);
fdi.iosize = sizeof(*fri);
op = FUSE_READ;
if (vtype == VDIR) {
op = FUSE_READDIR;
}
fdisp_make_vp(&fdi, op, vp, (vfs_context_t)0);
fri = fdi.indata;
fri->fh = fufh->fh_id;
/*
* Historical note:
*
* fri->offset = ((off_t)(buf_blkno(bp))) * biosize;
*
* This wasn't being incremented!?
*/
fri->offset = offset;
fri->size = (typeof(fri->size))chunksize;
fdi.tick->tk_aw_type = FT_A_BUF;
fdi.tick->tk_aw_bufdata = bufdat;
if ((err = fdisp_wait_answ(&fdi))) {
/* There was a problem with reading. */
goto out;
}
respsize = fdi.tick->tk_aw_bufsize;
if (respsize < 0) { /* Cannot really happen... */
err = EIO;
goto out;
}
buf_setresid(bp, (uint32_t)(buf_resid(bp) - respsize));
bufdat += respsize;
offset += respsize;
/* Did we hit EOF before being done? */
if ((respsize == 0) && (buf_resid(bp) > 0)) {
/*
* Historical note:
* If we don't get enough data, just fill the rest with zeros.
* In NFS context, this would mean a hole in the file.
*/
/* Zero-pad the incomplete buffer. */
bzero(bufdat, buf_resid(bp));
buf_setresid(bp, 0);
break;
}
} /* while (buf_resid(bp) > 0) */
} else {
/* write */
struct fuse_write_in *fwi;
struct fuse_write_out *fwo;
int merr = 0;
off_t diff;
if (buf_map(bp, &bufdat)) {
IOLog("MacFUSE: failed to map buffer in strategy\n");
return EFAULT;
} else {
mapped = TRUE;
}
/* Write begin */
buf_setresid(bp, buf_count(bp));
offset = (off_t)((off_t)buf_blkno(bp) * biosize);
/* XXX: TBD -- Check here for extension (writing past end) */
left = buf_count(bp);
while (left) {
fdi.iosize = sizeof(*fwi);
op = FUSE_WRITE;
fdisp_make_vp(&fdi, op, vp, (vfs_context_t)0);
chunksize = min((size_t)left, data->iosize);
fwi = fdi.indata;
fwi->fh = fufh->fh_id;
fwi->offset = offset;
fwi->size = (typeof(fwi->size))chunksize;
fdi.tick->tk_ms_type = FT_M_BUF;
fdi.tick->tk_ms_bufdata = bufdat;
fdi.tick->tk_ms_bufsize = chunksize;
/* About to write <chunksize> at <offset> */
if ((err = fdisp_wait_answ(&fdi))) {
merr = 1;
break;
}
fwo = fdi.answ;
diff = chunksize - fwo->size;
if (diff < 0) {
err = EINVAL;
break;
}
left -= fwo->size;
bufdat += fwo->size;
offset += fwo->size;
buf_setresid(bp, buf_resid(bp) - fwo->size);
}
if (merr) {
goto out;
}
}
if (fdi.tick) {
fuse_ticket_drop(fdi.tick);
} else {
/* No ticket upon leaving */
}
out:
if (err) {
buf_seterror(bp, err);
}
if (mapped == TRUE) {
buf_unmap(bp);
}
buf_biodone(bp);
return err;
}
errno_t
FSNodeGetOrCreateFileVNodeByID(vnode_t *vnPtr,
uint32_t flags,
struct fuse_abi_data *feo,
mount_t mp,
vnode_t dvp,
vfs_context_t context,
uint32_t *oflags)
{
int err;
vnode_t vn = NULLVP;
HNodeRef hn = NULL;
struct fuse_vnode_data *fvdat = NULL;
struct fuse_data *mntdata = NULL;
fuse_device_t dummy_device;
struct fuse_abi_data fa;
enum vtype vtyp;
fuse_abi_data_init(&fa, feo->fad_version, fuse_entry_out_get_attr(feo));
vtyp = IFTOVT(fuse_attr_get_mode(&fa));
if ((vtyp >= VBAD) || (vtyp == VNON)) {
return EINVAL;
}
int markroot = (flags & FN_IS_ROOT) ? 1 : 0;
uint64_t size = (flags & FN_IS_ROOT) ? 0 : fuse_attr_get_size(&fa);
uint32_t rdev = (flags & FN_IS_ROOT) ? 0 : fuse_attr_get_rdev(&fa);
uint64_t generation = fuse_entry_out_get_generation(feo);
mntdata = fuse_get_mpdata(mp);
dummy_device = mntdata->fdev;
err = HNodeLookupCreatingIfNecessary(dummy_device, fuse_entry_out_get_nodeid(feo),
0 /* fork index */, &hn, &vn);
if ((err == 0) && (vn == NULL)) {
struct vnode_fsparam params;
fvdat = (struct fuse_vnode_data *)FSNodeGenericFromHNode(hn);
if (!fvdat->fInitialised) {
fvdat->fInitialised = true;
/* self */
fvdat->vp = NULLVP; /* hold on */
fvdat->nodeid = fuse_entry_out_get_nodeid(feo);
fvdat->generation = generation;
/* parent */
fvdat->parentvp = dvp;
if (dvp) {
fvdat->parent_nodeid = VTOI(dvp);
} else {
fvdat->parent_nodeid = 0;
}
/* I/O */
{
int k;
for (k = 0; k < FUFH_MAXTYPE; k++) {
FUFH_USE_RESET(&(fvdat->fufh[k]));
}
}
/* flags */
fvdat->flag = flags;
fvdat->c_flag = 0;
/* meta */
/* XXX: truncation */
fvdat->entry_valid.tv_sec = (time_t)fuse_entry_out_get_entry_valid(feo);
fvdat->entry_valid.tv_nsec = fuse_entry_out_get_entry_valid_nsec(feo);
/* XXX: truncation */
fvdat->attr_valid.tv_sec = 0;
fvdat->attr_valid.tv_nsec = 0;
/* XXX: truncation */
fvdat->modify_time.tv_sec = (time_t)fuse_attr_get_mtime(&fa);
fvdat->modify_time.tv_nsec = fuse_attr_get_mtimensec(&fa);
fvdat->filesize = size;
fvdat->nlookup = 0;
fvdat->vtype = vtyp;
/* locking */
fvdat->createlock = lck_mtx_alloc_init(fuse_lock_group,
fuse_lock_attr);
fvdat->creator = current_thread();
#if M_OSXFUSE_ENABLE_TSLOCKING
fvdat->nodelock = lck_rw_alloc_init(fuse_lock_group,
fuse_lock_attr);
fvdat->nodelockowner = NULL;
fvdat->truncatelock = lck_rw_alloc_init(fuse_lock_group,
fuse_lock_attr);
#endif
}
if (err == 0) {
params.vnfs_mp = mp;
params.vnfs_vtype = vtyp;
params.vnfs_str = NULL;
params.vnfs_dvp = dvp; /* NULLVP for the root vnode */
params.vnfs_fsnode = hn;
#if M_OSXFUSE_ENABLE_SPECFS
if ((vtyp == VBLK) || (vtyp == VCHR)) {
params.vnfs_vops = fuse_spec_operations;
params.vnfs_rdev = (dev_t)rdev;
#else
if (0) {
#endif
#if M_OSXFUSE_ENABLE_FIFOFS
} else if (vtyp == VFIFO) {
params.vnfs_vops = fuse_fifo_operations;
params.vnfs_rdev = 0;
(void)rdev;
#else
} else if (0) {
#endif
} else {
params.vnfs_vops = fuse_vnode_operations;
params.vnfs_rdev = 0;
(void)rdev;
}
params.vnfs_marksystem = 0;
params.vnfs_cnp = NULL;
params.vnfs_flags = VNFS_NOCACHE | VNFS_CANTCACHE;
params.vnfs_filesize = size;
params.vnfs_markroot = markroot;
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(mntdata->biglock);
#endif
err = vnode_create(VNCREATE_FLAVOR, (uint32_t)sizeof(params),
¶ms, &vn);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(mntdata->biglock);
#endif
}
if (err == 0) {
if (markroot) {
fvdat->parentvp = vn;
} else {
fvdat->parentvp = dvp;
}
if (oflags) {
*oflags |= MAKEENTRY;
}
/* Need VT_OSXFUSE from xnu */
vnode_settag(vn, VT_OTHER);
cache_attrs(vn, fuse_entry_out, feo);
HNodeAttachVNodeSucceeded(hn, 0 /* forkIndex */, vn);
FUSE_OSAddAtomic(1, (SInt32 *)&fuse_vnodes_current);
} else {
if (HNodeAttachVNodeFailed(hn, 0 /* forkIndex */)) {
FSNodeScrub(fvdat);
HNodeScrubDone(hn);
}
}
}
if (err == 0) {
if (vnode_vtype(vn) != vtyp) {
IOLog("osxfuse: vnode changed type behind us (old=%d, new=%d)\n",
vnode_vtype(vn), vtyp);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(mntdata->biglock);
#endif
fuse_internal_vnode_disappear(vn, context, REVOKE_SOFT);
vnode_put(vn);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(mntdata->biglock);
#endif
err = EIO;
} else if (VTOFUD(vn)->generation != generation) {
IOLog("osxfuse: vnode changed generation\n");
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(mntdata->biglock);
#endif
fuse_internal_vnode_disappear(vn, context, REVOKE_SOFT);
vnode_put(vn);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(mntdata->biglock);
#endif
err = ESTALE;
}
}
if (err == 0) {
*vnPtr = vn;
}
/* assert((err == 0) == (*vnPtr != NULL); */
return err;
}
int
fuse_vget_i(vnode_t *vpp,
uint32_t flags,
struct fuse_abi_data *feo,
struct componentname *cnp,
vnode_t dvp,
mount_t mp,
vfs_context_t context)
{
int err = 0;
if (!feo) {
return EINVAL;
}
err = FSNodeGetOrCreateFileVNodeByID(vpp, flags, feo, mp, dvp,
context, NULL);
if (err) {
return err;
}
if (!fuse_isnovncache_mp(mp) && (cnp->cn_flags & MAKEENTRY)) {
fuse_vncache_enter(dvp, *vpp, cnp);
}
/* found: */
VTOFUD(*vpp)->nlookup++;
return 0;
}
int
fuse_internal_access(struct vnode *vp,
mode_t mode,
struct fuse_access_param *facp,
struct thread *td,
struct ucred *cred)
{
int err = 0;
uint32_t mask = 0;
int dataflags;
int vtype;
struct mount *mp;
struct fuse_dispatcher fdi;
struct fuse_access_in *fai;
struct fuse_data *data;
/* NOT YET DONE */
/*
* If this vnop gives you trouble, just return 0 here for a lazy
* kludge.
*/
/* return 0;*/
fuse_trace_printf_func();
mp = vnode_mount(vp);
vtype = vnode_vtype(vp);
data = fuse_get_mpdata(mp);
dataflags = data->dataflags;
if ((mode & VWRITE) && vfs_isrdonly(mp)) {
return EACCES;
}
/* Unless explicitly permitted, deny everyone except the fs owner. */
if (vnode_isvroot(vp) && !(facp->facc_flags & FACCESS_NOCHECKSPY)) {
if (!(dataflags & FSESS_DAEMON_CAN_SPY)) {
int denied = fuse_match_cred(data->daemoncred,
cred);
if (denied) {
return EPERM;
}
}
facp->facc_flags |= FACCESS_NOCHECKSPY;
}
if (!(facp->facc_flags & FACCESS_DO_ACCESS)) {
return 0;
}
if (((vtype == VREG) && (mode & VEXEC))) {
#ifdef NEED_MOUNT_ARGUMENT_FOR_THIS
/* Let the kernel handle this through open / close heuristics.*/
return ENOTSUP;
#else
/* Let the kernel handle this. */
return 0;
#endif
}
if (!fsess_isimpl(mp, FUSE_ACCESS)) {
/* Let the kernel handle this. */
return 0;
}
if (dataflags & FSESS_DEFAULT_PERMISSIONS) {
/* Let the kernel handle this. */
return 0;
}
if ((mode & VADMIN) != 0) {
err = priv_check_cred(cred, PRIV_VFS_ADMIN, 0);
if (err) {
return err;
}
}
if ((mode & (VWRITE | VAPPEND | VADMIN)) != 0) {
mask |= W_OK;
}
if ((mode & VREAD) != 0) {
mask |= R_OK;
}
if ((mode & VEXEC) != 0) {
mask |= X_OK;
}
bzero(&fdi, sizeof(fdi));
fdisp_init(&fdi, sizeof(*fai));
fdisp_make_vp(&fdi, FUSE_ACCESS, vp, td, cred);
fai = fdi.indata;
fai->mask = F_OK;
fai->mask |= mask;
err = fdisp_wait_answ(&fdi);
fdisp_destroy(&fdi);
if (err == ENOSYS) {
fsess_set_notimpl(mp, FUSE_ACCESS);
err = 0;
}
return err;
}
static void
handle_capabilities_and_attributes(mount_t mp, struct vfs_attr *attr)
{
struct fuse_data *data = fuse_get_mpdata(mp);
if (!data) {
panic("fuse4x: no private data for mount point?");
}
attr->f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] = 0
// | VOL_CAP_FMT_PERSISTENTOBJECTIDS
| VOL_CAP_FMT_SYMBOLICLINKS
/*
* Note that we don't really have hard links in a fuse4x file system
* unless the user file system daemon provides persistent/consistent
* inode numbers. Maybe instead of returning the "wrong" answer here
* we should just deny knowledge of this capability in the valid bits
* below.
*/
| VOL_CAP_FMT_HARDLINKS
// | VOL_CAP_FMT_JOURNAL
// | VOL_CAP_FMT_JOURNAL_ACTIVE
| VOL_CAP_FMT_NO_ROOT_TIMES
// | VOL_CAP_FMT_SPARSE_FILES
// | VOL_CAP_FMT_ZERO_RUNS
// | VOL_CAP_FMT_CASE_SENSITIVE
| VOL_CAP_FMT_CASE_PRESERVING
| VOL_CAP_FMT_FAST_STATFS
| VOL_CAP_FMT_2TB_FILESIZE
// | VOL_CAP_FMT_OPENDENYMODES
// | VOL_CAP_FMT_HIDDEN_FILES
// | VOL_CAP_FMT_PATH_FROM_ID
;
attr->f_capabilities.valid[VOL_CAPABILITIES_FORMAT] = 0
| VOL_CAP_FMT_PERSISTENTOBJECTIDS
| VOL_CAP_FMT_SYMBOLICLINKS
| VOL_CAP_FMT_HARDLINKS
| VOL_CAP_FMT_JOURNAL
| VOL_CAP_FMT_JOURNAL_ACTIVE
| VOL_CAP_FMT_NO_ROOT_TIMES
| VOL_CAP_FMT_SPARSE_FILES
| VOL_CAP_FMT_ZERO_RUNS
| VOL_CAP_FMT_CASE_SENSITIVE
| VOL_CAP_FMT_CASE_PRESERVING
| VOL_CAP_FMT_FAST_STATFS
| VOL_CAP_FMT_2TB_FILESIZE
| VOL_CAP_FMT_OPENDENYMODES
| VOL_CAP_FMT_HIDDEN_FILES
| VOL_CAP_FMT_PATH_FROM_ID
;
attr->f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] = 0
// | VOL_CAP_INT_SEARCHFS
| VOL_CAP_INT_ATTRLIST
// | VOL_CAP_INT_NFSEXPORT
// | VOL_CAP_INT_READDIRATTR
// | VOL_CAP_INT_EXCHANGEDATA
// | VOL_CAP_INT_COPYFILE
// | VOL_CAP_INT_ALLOCATE
// | VOL_CAP_INT_VOL_RENAME
| VOL_CAP_INT_ADVLOCK
| VOL_CAP_INT_FLOCK
| VOL_CAP_INT_EXTENDED_SECURITY
// | VOL_CAP_INT_USERACCESS
// | VOL_CAP_INT_MANLOCK
// | VOL_CAP_INT_EXTENDED_ATTR
// | VOL_CAP_INT_NAMEDSTREAMS
;
if (data->dataflags & FSESS_NATIVE_XATTR) {
attr->f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] |=
VOL_CAP_INT_EXTENDED_ATTR;
}
/* Don't set the EXCHANGEDATA capability if it's known not to be
* implemented in the FUSE daemon. */
if (fuse_implemented(data, FSESS_NOIMPLBIT(EXCHANGE))) {
attr->f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] |=
VOL_CAP_INT_EXCHANGEDATA;
}
attr->f_capabilities.valid[VOL_CAPABILITIES_INTERFACES] = 0
| VOL_CAP_INT_SEARCHFS
| VOL_CAP_INT_ATTRLIST
| VOL_CAP_INT_NFSEXPORT
| VOL_CAP_INT_READDIRATTR
| VOL_CAP_INT_EXCHANGEDATA
| VOL_CAP_INT_COPYFILE
| VOL_CAP_INT_ALLOCATE
| VOL_CAP_INT_VOL_RENAME
| VOL_CAP_INT_ADVLOCK
| VOL_CAP_INT_FLOCK
| VOL_CAP_INT_EXTENDED_SECURITY
| VOL_CAP_INT_USERACCESS
| VOL_CAP_INT_MANLOCK
| VOL_CAP_INT_EXTENDED_ATTR
| VOL_CAP_INT_NAMEDSTREAMS
;
attr->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED1] = 0;
attr->f_capabilities.valid[VOL_CAPABILITIES_RESERVED1] = 0;
attr->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED2] = 0;
attr->f_capabilities.valid[VOL_CAPABILITIES_RESERVED2] = 0;
VFSATTR_SET_SUPPORTED(attr, f_capabilities);
attr->f_attributes.validattr.commonattr = 0
| ATTR_CMN_NAME
| ATTR_CMN_DEVID
| ATTR_CMN_FSID
| ATTR_CMN_OBJTYPE
// | ATTR_CMN_OBJTAG
| ATTR_CMN_OBJID
// | ATTR_CMN_OBJPERMANENTID
| ATTR_CMN_PAROBJID
// | ATTR_CMN_SCRIPT
// | ATTR_CMN_CRTIME
| ATTR_CMN_MODTIME
// | ATTR_CMN_CHGTIME
// | ATTR_CMN_ACCTIME
// | ATTR_CMN_BKUPTIME
// | ATTR_CMN_FNDRINFO
| ATTR_CMN_OWNERID
| ATTR_CMN_GRPID
| ATTR_CMN_ACCESSMASK
| ATTR_CMN_FLAGS
// | ATTR_CMN_USERACCESS
| ATTR_CMN_EXTENDED_SECURITY
// | ATTR_CMN_UUID
// | ATTR_CMN_GRPUUID
// | ATTR_CMN_FILEID
// | ATTR_CMN_PARENTID
;
attr->f_attributes.validattr.volattr = 0
| ATTR_VOL_FSTYPE
| ATTR_VOL_SIGNATURE
| ATTR_VOL_SIZE
| ATTR_VOL_SPACEFREE
| ATTR_VOL_SPACEAVAIL
// | ATTR_VOL_MINALLOCATION
// | ATTR_VOL_ALLOCATIONCLUMP
| ATTR_VOL_IOBLOCKSIZE
// | ATTR_VOL_OBJCOUNT
| ATTR_VOL_FILECOUNT
// | ATTR_VOL_DIRCOUNT
// | ATTR_VOL_MAXOBJCOUNT
| ATTR_VOL_MOUNTPOINT
| ATTR_VOL_NAME
| ATTR_VOL_MOUNTFLAGS
| ATTR_VOL_MOUNTEDDEVICE
// | ATTR_VOL_ENCODINGSUSED
| ATTR_VOL_CAPABILITIES
| ATTR_VOL_ATTRIBUTES
// | ATTR_VOL_INFO
;
attr->f_attributes.validattr.dirattr = 0
| ATTR_DIR_LINKCOUNT
// | ATTR_DIR_ENTRYCOUNT
// | ATTR_DIR_MOUNTSTATUS
;
attr->f_attributes.validattr.fileattr = 0
| ATTR_FILE_LINKCOUNT
| ATTR_FILE_TOTALSIZE
| ATTR_FILE_ALLOCSIZE
| ATTR_FILE_IOBLOCKSIZE
| ATTR_FILE_DEVTYPE
// | ATTR_FILE_FORKCOUNT
// | ATTR_FILE_FORKLIST
| ATTR_FILE_DATALENGTH
| ATTR_FILE_DATAALLOCSIZE
// | ATTR_FILE_RSRCLENGTH
// | ATTR_FILE_RSRCALLOCSIZE
;
attr->f_attributes.validattr.forkattr = 0;
// | ATTR_FORK_TOTALSIZE
// | ATTR_FORK_ALLOCSIZE
;
// Handle some special cases
if (!(data->dataflags & FSESS_CASE_INSENSITIVE)) {
attr->f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] |=
VOL_CAP_FMT_CASE_SENSITIVE;
}
/*
if (data->dataflags & FSESS_VOL_RENAME) {
attr->f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] |=
VOL_CAP_INT_VOL_RENAME;
} else {
fuse_clear_implemented(data, FSESS_NOIMPLBIT(SETVOLNAME));
}
*/
/* Not yet. */
fuse_clear_implemented(data, FSESS_NOIMPLBIT(SETVOLNAME));
if (data->dataflags & FSESS_XTIMES) {
attr->f_attributes.validattr.commonattr |=
(ATTR_CMN_BKUPTIME | ATTR_CMN_CHGTIME | ATTR_CMN_CRTIME);
} else {
fuse_clear_implemented(data, FSESS_NOIMPLBIT(GETXTIMES));
}
// All attributes that we do support, we support natively.
attr->f_attributes.nativeattr.commonattr = \
attr->f_attributes.validattr.commonattr;
attr->f_attributes.nativeattr.volattr = \
attr->f_attributes.validattr.volattr;
attr->f_attributes.nativeattr.dirattr = \
attr->f_attributes.validattr.dirattr;
attr->f_attributes.nativeattr.fileattr = \
attr->f_attributes.validattr.fileattr;
attr->f_attributes.nativeattr.forkattr = \
attr->f_attributes.validattr.forkattr;
VFSATTR_SET_SUPPORTED(attr, f_attributes);
}
static errno_t
fuse_vfsop_unmount(mount_t mp, int mntflags, vfs_context_t context)
{
int err = 0;
int flags = 0;
fuse_device_t fdev;
struct fuse_data *data;
struct fuse_dispatcher fdi;
vnode_t fuse_rootvp = NULLVP;
fuse_trace_printf_vfsop();
if (mntflags & MNT_FORCE) {
flags |= FORCECLOSE;
}
data = fuse_get_mpdata(mp);
if (!data) {
panic("fuse4x: no mount private data in vfs_unmount");
}
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_lock(data->biglock);
#endif
fdev = data->fdev;
if (fdata_dead_get(data)) {
/*
* If the file system daemon is dead, it's pointless to try to do
* any unmount-time operations that go out to user space. Therefore,
* we pretend that this is a force unmount. However, this isn't of much
* use. That's because if any non-root vnode is in use, the vflush()
* that the kernel does before calling our VFS_UNMOUNT will fail
* if the original unmount wasn't forcible already. That earlier
* vflush is called with SKIPROOT though, so it wouldn't bail out
* on the root vnode being in use.
*
* If we want, we could set FORCECLOSE here so that a non-forced
* unmount will be "upgraded" to a forced unmount if the root vnode
* is busy (you are cd'd to the mount point, for example). It's not
* quite pure to do that though.
*
* flags |= FORCECLOSE;
* log("fuse4x: forcing unmount on a dead file system\n");
*/
} else if (!(data->dataflags & FSESS_INITED)) {
flags |= FORCECLOSE;
log("fuse4x: forcing unmount on not-yet-alive file system\n");
fdata_set_dead(data);
}
fuse_rootvp = data->rootvp;
fuse_trace_printf("%s: Calling vflush(mp, fuse_rootvp, flags=0x%X);\n", __FUNCTION__, flags);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
err = vflush(mp, fuse_rootvp, flags);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_lock(data->biglock);
#endif
fuse_trace_printf("%s: Done.\n", __FUNCTION__);
if (err) {
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
return err;
}
if (vnode_isinuse(fuse_rootvp, 1) && !(flags & FORCECLOSE)) {
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
return EBUSY;
}
if (fdata_dead_get(data)) {
goto alreadydead;
}
fdisp_init(&fdi, 0 /* no data to send along */);
fdisp_make(&fdi, FUSE_DESTROY, mp, FUSE_ROOT_ID, context);
fuse_trace_printf("%s: Waiting for reply from FUSE_DESTROY.\n", __FUNCTION__);
err = fdisp_wait_answ(&fdi);
fuse_trace_printf("%s: Reply received.\n", __FUNCTION__);
if (!err) {
fuse_ticket_drop(fdi.tick);
}
/*
* Note that dounmount() signals a VQ_UNMOUNT VFS event.
*/
fdata_set_dead(data);
alreadydead:
fuse_trace_printf("%s: Calling vnode_rele(fuse_rootp);\n", __FUNCTION__);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
vnode_rele(fuse_rootvp); /* We got this reference in fuse_vfsop_mount(). */
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_lock(data->biglock);
#endif
fuse_trace_printf("%s: Done.\n", __FUNCTION__);
data->rootvp = NULLVP;
fuse_trace_printf("%s: Calling vflush(mp, NULLVP, FORCECLOSE);\n", __FUNCTION__);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
(void)vflush(mp, NULLVP, FORCECLOSE);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_lock(data->biglock);
#endif
fuse_trace_printf("%s: Done.\n", __FUNCTION__);
fuse_lck_mtx_lock(fdev->mtx);
vfs_setfsprivate(mp, NULL);
data->dataflags &= ~FSESS_MOUNTED;
OSAddAtomic(-1, (SInt32 *)&fuse_mount_count);
#if M_FUSE4X_ENABLE_BIGLOCK
fuse_biglock_unlock(data->biglock);
#endif
if (!(data->dataflags & FSESS_OPENED)) {
/* fdev->data was left for us to clean up */
fuse_device_close_final(fdev);
/* fdev->data is gone now */
}
fuse_lck_mtx_unlock(fdev->mtx);
return 0;
}
/*
struct vnop_getattr_args {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct thread *a_td;
};
*/
static int
fuse_vnop_getattr(struct vop_getattr_args *ap)
{
struct vnode *vp = ap->a_vp;
struct vattr *vap = ap->a_vap;
struct ucred *cred = ap->a_cred;
struct thread *td = curthread;
struct fuse_vnode_data *fvdat = VTOFUD(vp);
int err = 0;
int dataflags;
struct fuse_dispatcher fdi;
FS_DEBUG2G("inode=%ju\n", (uintmax_t)VTOI(vp));
dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;
/* Note that we are not bailing out on a dead file system just yet. */
if (!(dataflags & FSESS_INITED)) {
if (!vnode_isvroot(vp)) {
fdata_set_dead(fuse_get_mpdata(vnode_mount(vp)));
err = ENOTCONN;
debug_printf("fuse_getattr b: returning ENOTCONN\n");
return err;
} else {
goto fake;
}
}
fdisp_init(&fdi, 0);
if ((err = fdisp_simple_putget_vp(&fdi, FUSE_GETATTR, vp, td, cred))) {
if ((err == ENOTCONN) && vnode_isvroot(vp)) {
/* see comment at similar place in fuse_statfs() */
fdisp_destroy(&fdi);
goto fake;
}
if (err == ENOENT) {
fuse_internal_vnode_disappear(vp);
}
goto out;
}
cache_attrs(vp, (struct fuse_attr_out *)fdi.answ);
if (vap != VTOVA(vp)) {
memcpy(vap, VTOVA(vp), sizeof(*vap));
}
if (vap->va_type != vnode_vtype(vp)) {
fuse_internal_vnode_disappear(vp);
err = ENOENT;
goto out;
}
if ((fvdat->flag & FN_SIZECHANGE) != 0)
vap->va_size = fvdat->filesize;
if (vnode_isreg(vp) && (fvdat->flag & FN_SIZECHANGE) == 0) {
/*
* This is for those cases when the file size changed without us
* knowing, and we want to catch up.
*/
off_t new_filesize = ((struct fuse_attr_out *)
fdi.answ)->attr.size;
if (fvdat->filesize != new_filesize) {
fuse_vnode_setsize(vp, cred, new_filesize);
}
}
debug_printf("fuse_getattr e: returning 0\n");
out:
fdisp_destroy(&fdi);
return err;
fake:
bzero(vap, sizeof(*vap));
vap->va_type = vnode_vtype(vp);
return 0;
}
__private_extern__
int
fuse_internal_remove(vnode_t dvp,
vnode_t vp,
struct componentname *cnp,
enum fuse_opcode op,
vfs_context_t context)
{
struct fuse_dispatcher fdi;
struct vnode_attr *vap = VTOVA(vp);
int need_invalidate = 0;
uint64_t target_nlink = 0;
mount_t mp = vnode_mount(vp);
int err = 0;
fdisp_init(&fdi, cnp->cn_namelen + 1);
fdisp_make_vp(&fdi, op, dvp, context);
memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
((char *)fdi.indata)[cnp->cn_namelen] = '\0';
if ((vap->va_nlink > 1) && vnode_isreg(vp)) {
need_invalidate = 1;
target_nlink = vap->va_nlink;
}
if (!(err = fdisp_wait_answ(&fdi))) {
fuse_ticket_drop(fdi.tick);
}
fuse_invalidate_attr(dvp);
fuse_invalidate_attr(vp);
/*
* XXX: M_MACFUSE_INVALIDATE_CACHED_VATTRS_UPON_UNLINK
*
* Consider the case where vap->va_nlink > 1 for the entity being
* removed. In our world, other in-memory vnodes that share a link
* count each with this one may not know right way that this one just
* got deleted. We should let them know, say, through a vnode_iterate()
* here and a callback that does fuse_invalidate_attr(vp) on each
* relevant vnode.
*/
if (need_invalidate && !err) {
if (!vfs_busy(mp, LK_NOWAIT)) {
#if M_MACFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_MACFUSE_ENABLE_HUGE_LOCK
struct fuse_data *data = fuse_get_mpdata(mp);
fuse_biglock_unlock(data->biglock);
#endif
vnode_iterate(mp, 0, fuse_internal_remove_callback,
(void *)&target_nlink);
#if M_MACFUSE_ENABLE_INTERIM_FSNODE_LOCK && !M_MACFUSE_ENABLE_HUGE_LOCK
fuse_biglock_lock(data->biglock);
#endif
vfs_unbusy(mp);
} else {
IOLog("MacFUSE: skipping link count fixup upon remove\n");
}
}
return err;
}
/*
* Because of the vagaries of how a filehandle can be used, we try not to
* be too smart in here (we try to be smart elsewhere). It is required that
* you come in here only if you really do not have the said filehandle--else
* we panic.
*/
int
fuse_filehandle_get(vnode_t vp,
vfs_context_t context,
fufh_type_t fufh_type,
int mode)
{
struct fuse_dispatcher fdi;
struct fuse_abi_data foi;
struct fuse_abi_data foo;
struct fuse_filehandle *fufh;
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
int err = 0;
int oflags = 0;
int op = FUSE_OPEN;
fuse_trace_printf("fuse_filehandle_get(vp=%p, fufh_type=%d, mode=%x)\n",
vp, fufh_type, mode);
fufh = &(fvdat->fufh[fufh_type]);
if (FUFH_IS_VALID(fufh)) {
panic("osxfuse: filehandle_get called despite valid fufh (type=%d)",
fufh_type);
/* NOTREACHED */
}
/*
* Note that this means we are effectively FILTERING OUT open() flags.
*/
(void)mode;
oflags = fuse_filehandle_xlate_to_oflags(fufh_type);
if (vnode_isdir(vp)) {
op = FUSE_OPENDIR;
if (fufh_type != FUFH_RDONLY) {
IOLog("osxfuse: non-rdonly fufh requested for directory\n");
fufh_type = FUFH_RDONLY;
}
}
if (vnode_islnk(vp) && (mode & O_SYMLINK)) {
oflags |= O_SYMLINK;
}
if ((mode & O_TRUNC) && (data->dataflags & FSESS_ATOMIC_O_TRUNC)) {
oflags |= O_TRUNC;
}
fdisp_init_abi(&fdi, fuse_open_in, data);
fdisp_make_vp(&fdi, op, vp, context);
fuse_abi_data_init(&foi, DATOI(data), fdi.indata);
fuse_open_in_set_flags(&foi, oflags);
FUSE_OSAddAtomic(1, (SInt32 *)&fuse_fh_upcall_count);
err = fdisp_wait_answ(&fdi);
if (err) {
#if M_OSXFUSE_ENABLE_UNSUPPORTED
const char *vname = vnode_getname(vp);
#endif /* M_OSXFUSE_ENABLE_UNSUPPORTED */
if (err == ENOENT) {
/*
* See comment in fuse_vnop_reclaim().
*/
cache_purge(vp);
}
#if M_OSXFUSE_ENABLE_UNSUPPORTED
IOLog("osxfuse: filehandle_get: failed for %s "
"(type=%d, err=%d, caller=%p)\n",
(vname) ? vname : "?", fufh_type, err,
__builtin_return_address(0));
if (vname) {
vnode_putname(vname);
}
#endif /* M_OSXFUSE_ENABLE_UNSUPPORTED */
if (err == ENOENT) {
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_unlock(data->biglock);
#endif
fuse_internal_vnode_disappear(vp, context, REVOKE_SOFT);
#if M_OSXFUSE_ENABLE_BIG_LOCK
fuse_biglock_lock(data->biglock);
#endif
}
return err;
}
FUSE_OSAddAtomic(1, (SInt32 *)&fuse_fh_current);
fuse_abi_data_init(&foo, DATOI(data), fdi.answ);
fufh->fh_id = fuse_open_out_get_fh(&foo);
fufh->open_count = 1;
fufh->open_flags = oflags;
fufh->fuse_open_flags = fuse_open_out_get_open_flags(&foo);
fufh->aux_count = 0;
fuse_ticket_release(fdi.tick);
return 0;
}
static errno_t
fuse_vfsop_getattr(mount_t mp, struct vfs_attr *attr, vfs_context_t context)
{
int err = 0;
bool deading = false, faking = false;
struct fuse_dispatcher fdi;
struct fuse_statfs_out *fsfo;
struct fuse_statfs_out faked;
struct fuse_data *data;
fuse_trace_printf_vfsop();
data = fuse_get_mpdata(mp);
if (!data) {
panic("fuse4x: no private data for mount point?");
}
if (!(data->dataflags & FSESS_INITED)) {
// coreservices process requests ATTR_VOL_CAPABILITIES on the mountpoint right before
// returning from mount() syscall. We need to fake the output because daemon might
// not be ready to response yet (and deadlock will happen).
faking = true;
goto dostatfs;
}
fdisp_init(&fdi, 0);
fdisp_make(&fdi, FUSE_STATFS, mp, FUSE_ROOT_ID, context);
if ((err = fdisp_wait_answ(&fdi))) {
// If we cannot communicate with the daemon (most likely because
// it's dead), we still want to portray that we are a bonafide
// file system so that we can be gracefully unmounted.
if (err == ENOTCONN) {
deading = faking = true;
goto dostatfs;
}
return err;
}
dostatfs:
if (faking) {
bzero(&faked, sizeof(faked));
fsfo = &faked;
} else {
fsfo = fdi.answ;
}
if (fsfo->st.bsize == 0) {
fsfo->st.bsize = FUSE_DEFAULT_IOSIZE;
}
if (fsfo->st.frsize == 0) {
fsfo->st.frsize = FUSE_DEFAULT_BLOCKSIZE;
}
/* optimal transfer block size; will go into f_iosize in the kernel */
fsfo->st.bsize = fuse_round_size(fsfo->st.bsize,
FUSE_MIN_IOSIZE, FUSE_MAX_IOSIZE);
/* file system fragment size; will go into f_bsize in the kernel */
fsfo->st.frsize = fuse_round_size(fsfo->st.frsize,
FUSE_MIN_BLOCKSIZE, FUSE_MAX_BLOCKSIZE);
/* We must have: f_iosize >= f_bsize (fsfo->st.bsize >= fsfo->st_frsize) */
if (fsfo->st.bsize < fsfo->st.frsize) {
fsfo->st.bsize = fsfo->st.frsize;
}
/*
* TBD: Possibility:
*
* For actual I/O to fuse4x's "virtual" storage device, we use
* data->blocksize and data->iosize. These are really meant to be
* constant across the lifetime of a single mount. If necessary, we
* can experiment by updating the mount point's stat with the frsize
* and bsize values we come across here.
*/
/*
* FUSE user daemon will (might) give us this:
*
* __u64 blocks; // total data blocks in the file system
* __u64 bfree; // free blocks in the file system
* __u64 bavail; // free blocks available to non-superuser
* __u64 files; // total file nodes in the file system
* __u64 ffree; // free file nodes in the file system
* __u32 bsize; // preferred/optimal file system block size
* __u32 namelen; // maximum length of filenames
* __u32 frsize; // fundamental file system block size
*
* On Mac OS X, we will map this data to struct vfs_attr as follows:
*
* Mac OS X FUSE
* -------- ----
* uint64_t f_supported <- // handled here
* uint64_t f_active <- // handled here
* uint64_t f_objcount <- -
* uint64_t f_filecount <- files
* uint64_t f_dircount <- -
* uint32_t f_bsize <- frsize
* size_t f_iosize <- bsize
* uint64_t f_blocks <- blocks
* uint64_t f_bfree <- bfree
* uint64_t f_bavail <- bavail
* uint64_t f_bused <- blocks - bfree
* uint64_t f_files <- files
* uint64_t f_ffree <- ffree
* fsid_t f_fsid <- // handled elsewhere
* uid_t f_owner <- // handled elsewhere
* ... capabilities <- // handled here
* ... attributes <- // handled here
* f_create_time <- -
* f_modify_time <- -
* f_access_time <- -
* f_backup_time <- -
* uint32_t f_fssubtype <- // daemon provides
* char *f_vol_name <- // handled here
* uint16_t f_signature <- // handled here
* uint16_t f_carbon_fsid <- // handled here
*/
VFSATTR_RETURN(attr, f_filecount, fsfo->st.files);
VFSATTR_RETURN(attr, f_bsize, fsfo->st.frsize);
VFSATTR_RETURN(attr, f_iosize, fsfo->st.bsize);
VFSATTR_RETURN(attr, f_blocks, fsfo->st.blocks);
VFSATTR_RETURN(attr, f_bfree, fsfo->st.bfree);
VFSATTR_RETURN(attr, f_bavail, fsfo->st.bavail);
VFSATTR_RETURN(attr, f_bused, (fsfo->st.blocks - fsfo->st.bfree));
VFSATTR_RETURN(attr, f_files, fsfo->st.files);
VFSATTR_RETURN(attr, f_ffree, fsfo->st.ffree);
/* f_fsid and f_owner handled elsewhere. */
/* Handle capabilities and attributes. */
handle_capabilities_and_attributes(mp, attr);
VFSATTR_RETURN(attr, f_create_time, kZeroTime);
VFSATTR_RETURN(attr, f_modify_time, kZeroTime);
VFSATTR_RETURN(attr, f_access_time, kZeroTime);
VFSATTR_RETURN(attr, f_backup_time, kZeroTime);
if (deading) {
VFSATTR_RETURN(attr, f_fssubtype, (uint32_t)FUSE_FSSUBTYPE_INVALID);
} else {
VFSATTR_RETURN(attr, f_fssubtype, data->fssubtype);
}
/* Daemon needs to pass this. */
if (VFSATTR_IS_ACTIVE(attr, f_vol_name)) {
if (data->volname[0] != 0) {
strncpy(attr->f_vol_name, data->volname, MAXPATHLEN);
attr->f_vol_name[MAXPATHLEN - 1] = 0;
VFSATTR_SET_SUPPORTED(attr, f_vol_name);
}
}
VFSATTR_RETURN(attr, f_signature, OSSwapBigToHostInt16(FUSEFS_SIGNATURE));
VFSATTR_RETURN(attr, f_carbon_fsid, 0);
if (!faking)
fuse_ticket_drop(fdi.tick);
return 0;
}
static int
fuse_vfsop_unmount(struct mount *mp, int mntflags)
{
int err = 0;
int flags = 0;
struct cdev *fdev;
struct fuse_data *data;
struct fuse_dispatcher fdi;
struct thread *td = curthread;
fuse_trace_printf_vfsop();
if (mntflags & MNT_FORCE) {
flags |= FORCECLOSE;
}
data = fuse_get_mpdata(mp);
if (!data) {
panic("no private data for mount point?");
}
/* There is 1 extra root vnode reference (mp->mnt_data). */
FUSE_LOCK();
if (data->vroot != NULL) {
struct vnode *vroot = data->vroot;
data->vroot = NULL;
FUSE_UNLOCK();
vrele(vroot);
} else
FUSE_UNLOCK();
err = vflush(mp, 0, flags, td);
if (err) {
debug_printf("vflush failed");
return err;
}
if (fdata_get_dead(data)) {
goto alreadydead;
}
fdisp_init(&fdi, 0);
fdisp_make(&fdi, FUSE_DESTROY, mp, 0, td, NULL);
err = fdisp_wait_answ(&fdi);
fdisp_destroy(&fdi);
fdata_set_dead(data);
alreadydead:
FUSE_LOCK();
data->mp = NULL;
fdev = data->fdev;
fdata_trydestroy(data);
FUSE_UNLOCK();
MNT_ILOCK(mp);
mp->mnt_data = NULL;
mp->mnt_flag &= ~MNT_LOCAL;
MNT_IUNLOCK(mp);
dev_rel(fdev);
return 0;
}
