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;
}
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;
}
