/**
* \brief Allocates a new VNode, adding it to the page table and our metadata
*/
errval_t alloc_vnode(struct pmap_x86 *pmap, struct vnode *root,
enum objtype type, uint32_t entry,
struct vnode **retvnode)
{
errval_t err;
struct vnode *newvnode = slab_alloc(&pmap->slab);
if (newvnode == NULL) {
return LIB_ERR_SLAB_ALLOC_FAIL;
}
// The VNode capability
err = pmap->p.slot_alloc->alloc(pmap->p.slot_alloc, &newvnode->u.vnode.cap);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_SLOT_ALLOC);
}
err = vnode_create(newvnode->u.vnode.cap, type);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_VNODE_CREATE);
}
// XXX: need to make sure that vnode cap that we will invoke is in our cspace!
if (get_croot_addr(newvnode->u.vnode.cap) != CPTR_ROOTCN) {
// debug_printf("%s: creating vnode for another domain in that domain's cspace; need to copy vnode cap to our cspace to make it invokable\n", __FUNCTION__);
err = slot_alloc(&newvnode->u.vnode.invokable);
assert(err_is_ok(err));
err = cap_copy(newvnode->u.vnode.invokable, newvnode->u.vnode.cap);
assert(err_is_ok(err));
} else {
// debug_printf("vnode in our cspace: copying capref to invokable\n");
newvnode->u.vnode.invokable = newvnode->u.vnode.cap;
}
assert(!capref_is_null(newvnode->u.vnode.cap));
assert(!capref_is_null(newvnode->u.vnode.invokable));
err = pmap->p.slot_alloc->alloc(pmap->p.slot_alloc, &newvnode->mapping);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_SLOT_ALLOC);
}
// Map it
err = vnode_map(root->u.vnode.invokable, newvnode->u.vnode.cap, entry,
PTABLE_ACCESS_DEFAULT, 0, 1, newvnode->mapping);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_VNODE_MAP);
}
// The VNode meta data
newvnode->is_vnode = true;
newvnode->entry = entry;
newvnode->next = root->u.vnode.children;
root->u.vnode.children = newvnode;
newvnode->u.vnode.children = NULL;
*retvnode = newvnode;
return SYS_ERR_OK;
}
/**
* \brief Allocates a new VNode, adding it to the page table and our metadata
*/
static errval_t alloc_vnode(struct pmap_arm *pmap_arm, struct vnode *root,
enum objtype type, uint32_t entry,
struct vnode **retvnode)
{
assert(root->is_vnode);
errval_t err;
struct vnode *newvnode = slab_alloc(&pmap_arm->slab);
if (newvnode == NULL) {
return LIB_ERR_SLAB_ALLOC_FAIL;
}
newvnode->is_vnode = true;
// The VNode capability
err = slot_alloc(&newvnode->u.vnode.cap);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_SLOT_ALLOC);
}
err = vnode_create(newvnode->u.vnode.cap, type);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_VNODE_CREATE);
}
err = vnode_map(root->u.vnode.cap, newvnode->u.vnode.cap, entry,
KPI_PAGING_FLAGS_READ | KPI_PAGING_FLAGS_WRITE, 0, 1);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_VNODE_MAP);
}
// The VNode meta data
newvnode->entry = entry;
newvnode->next = root->u.vnode.children;
root->u.vnode.children = newvnode;
newvnode->u.vnode.children = NULL;
if (retvnode) {
*retvnode = newvnode;
}
return SYS_ERR_OK;
}
/* assumption is that vnode has iocount on it after vnode create */
int
null_getnewvnode(
struct mount * mp, struct vnode * lowervp, struct vnode * dvp, struct vnode ** vpp, struct componentname * cnp, int root)
{
struct vnode_fsparam vnfs_param;
int error = 0;
enum vtype type = VDIR;
struct null_node * xp = null_nodecreate(lowervp);
if (xp == NULL) {
return ENOMEM;
}
if (lowervp) {
type = vnode_vtype(lowervp);
}
vnfs_param.vnfs_mp = mp;
vnfs_param.vnfs_vtype = type;
vnfs_param.vnfs_str = "nullfs";
vnfs_param.vnfs_dvp = dvp;
vnfs_param.vnfs_fsnode = (void *)xp;
vnfs_param.vnfs_vops = nullfs_vnodeop_p;
vnfs_param.vnfs_markroot = root;
vnfs_param.vnfs_marksystem = 0;
vnfs_param.vnfs_rdev = 0;
vnfs_param.vnfs_filesize = 0; // set this to 0 since we should only be shadowing non-regular files
vnfs_param.vnfs_cnp = cnp;
vnfs_param.vnfs_flags = VNFS_ADDFSREF;
error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vnfs_param, vpp);
if (error == 0) {
xp->null_vnode = *vpp;
xp->null_myvid = vnode_vid(*vpp);
vnode_settag(*vpp, VT_NULL);
} else {
FREE(xp, M_TEMP);
}
return error;
}
/**
* Helper function to create XNU VFS vnode object.
*
* @param mp Mount data structure
* @param type vnode type (directory, regular file, etc)
* @param pParent Parent vnode object (NULL for VBoxVFS root vnode)
* @param fIsRoot Flag that indicates if created vnode object is
* VBoxVFS root vnode (TRUE for VBoxVFS root vnode, FALSE
* for all aother vnodes)
* @param Path within Shared Folder
* @param ret Returned newly created vnode
*
* @return 0 on success, error code otherwise
*/
int
vboxvfs_create_vnode_internal(struct mount *mp, enum vtype type, vnode_t pParent, int fIsRoot, PSHFLSTRING Path, vnode_t *ret)
{
int rc;
vnode_t vnode;
vboxvfs_vnode_t *pVnodeData;
vboxvfs_mount_t *pMount;
AssertReturn(mp, EINVAL);
pMount = (vboxvfs_mount_t *)vfs_fsprivate(mp);
AssertReturn(pMount, EINVAL);
AssertReturn(pMount->pLockGroup, EINVAL);
AssertReturn(Path, EINVAL);
pVnodeData = (vboxvfs_vnode_t *)RTMemAllocZ(sizeof(vboxvfs_vnode_t));
AssertReturn(pVnodeData, ENOMEM);
/* Initialize private data */
pVnodeData->pHandle = SHFL_HANDLE_NIL;
pVnodeData->pPath = Path;
pVnodeData->pLockAttr = lck_attr_alloc_init();
if (pVnodeData->pLockAttr)
{
pVnodeData->pLock = lck_rw_alloc_init(pMount->pLockGroup, pVnodeData->pLockAttr);
if (pVnodeData->pLock)
{
struct vnode_fsparam vnode_params;
vnode_params.vnfs_mp = mp;
vnode_params.vnfs_vtype = type;
vnode_params.vnfs_str = NULL;
vnode_params.vnfs_dvp = pParent;
vnode_params.vnfs_fsnode = pVnodeData; /** Private data attached per xnu's vnode object */
vnode_params.vnfs_vops = g_VBoxVFSVnodeDirOpsVector;
vnode_params.vnfs_markroot = fIsRoot;
vnode_params.vnfs_marksystem = FALSE;
vnode_params.vnfs_rdev = 0;
vnode_params.vnfs_filesize = 0;
vnode_params.vnfs_cnp = NULL;
vnode_params.vnfs_flags = VNFS_ADDFSREF | VNFS_NOCACHE;
rc = vnode_create(VNCREATE_FLAVOR, sizeof(vnode_params), &vnode_params, &vnode);
if (rc == 0)
*ret = vnode;
return 0;
}
else
{
PDEBUG("Unable to allocate lock");
rc = ENOMEM;
}
lck_attr_free(pVnodeData->pLockAttr);
}
else
{
PDEBUG("Unable to allocate lock attr");
rc = ENOMEM;
}
return rc;
}
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;
}
/**
* \brief Setup an initial cspace
*
* Create an initial cspace layout
*/
static errval_t spawn_setup_cspace(struct spawninfo *si)
{
errval_t err;
struct capref t1;
/* Create root CNode */
err = cnode_create(&si->rootcn_cap, &si->rootcn, DEFAULT_CNODE_SLOTS, NULL);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_CREATE_ROOTCN);
}
/* Create taskcn */
err = cnode_create(&si->taskcn_cap, &si->taskcn, DEFAULT_CNODE_SLOTS, NULL);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_CREATE_TASKCN);
}
// Mint into rootcn setting the guard
t1.cnode = si->rootcn;
t1.slot = ROOTCN_SLOT_TASKCN;
err = cap_mint(t1, si->taskcn_cap, 0,
GUARD_REMAINDER(2 * DEFAULT_CNODE_BITS));
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_MINT_TASKCN);
}
/* Create slot_alloc_cnode */
t1.cnode = si->rootcn;
t1.slot = ROOTCN_SLOT_SLOT_ALLOC0;
err = cnode_create_raw(t1, NULL, (1<<SLOT_ALLOC_CNODE_BITS), NULL);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_CREATE_SLOTALLOC_CNODE);
}
t1.cnode = si->rootcn;
t1.slot = ROOTCN_SLOT_SLOT_ALLOC1;
err = cnode_create_raw(t1, NULL, (1<<SLOT_ALLOC_CNODE_BITS), NULL);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_CREATE_SLOTALLOC_CNODE);
}
t1.cnode = si->rootcn;
t1.slot = ROOTCN_SLOT_SLOT_ALLOC2;
err = cnode_create_raw(t1, NULL, (1<<SLOT_ALLOC_CNODE_BITS), NULL);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_CREATE_SLOTALLOC_CNODE);
}
// Create DCB
si->dcb.cnode = si->taskcn;
si->dcb.slot = TASKCN_SLOT_DISPATCHER;
err = dispatcher_create(si->dcb);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_CREATE_DISPATCHER);
}
// Give domain endpoint to itself (in taskcn)
struct capref selfep = {
.cnode = si->taskcn,
.slot = TASKCN_SLOT_SELFEP,
};
err = cap_retype(selfep, si->dcb, ObjType_EndPoint, 0);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_CREATE_SELFEP);
}
// Map root CNode (in taskcn)
t1.cnode = si->taskcn;
t1.slot = TASKCN_SLOT_ROOTCN;
err = cap_mint(t1, si->rootcn_cap, 0, 0);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_MINT_ROOTCN);
}
#ifdef TRACING_EXISTS
// Set up tracing for the child
err = trace_setup_child(si->taskcn, si->handle);
if (err_is_fail(err)) {
printf("Warning: error setting up tracing for child domain\n");
// SYS_DEBUG(err, ...);
}
#endif
// XXX: copy over argspg?
memset(&si->argspg, 0, sizeof(si->argspg));
/* Fill up basecn */
struct capref basecn_cap;
struct cnoderef basecn;
// Create basecn in rootcn
basecn_cap.cnode = si->rootcn;
basecn_cap.slot = ROOTCN_SLOT_BASE_PAGE_CN;
err = cnode_create_raw(basecn_cap, &basecn, DEFAULT_CNODE_SLOTS, NULL);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_CNODE_CREATE);
}
// Place the ram caps
for (uint8_t i = 0; i < DEFAULT_CNODE_SLOTS; i++) {
struct capref base = {
.cnode = basecn,
.slot = i
};
struct capref ram;
err = ram_alloc(&ram, BASE_PAGE_BITS);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_RAM_ALLOC);
}
err = cap_copy(base, ram);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_CAP_COPY);
}
err = cap_destroy(ram);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_CAP_DESTROY);
}
}
return SYS_ERR_OK;
}
static errval_t spawn_setup_vspace(struct spawninfo *si)
{
errval_t err;
/* Create pagecn */
si->pagecn_cap = (struct capref){.cnode = si->rootcn, .slot = ROOTCN_SLOT_PAGECN};
err = cnode_create_raw(si->pagecn_cap, &si->pagecn, PAGE_CNODE_SLOTS, NULL);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_CREATE_PAGECN);
}
/* Init pagecn's slot allocator */
// XXX: satisfy a peculiarity of the single_slot_alloc_init_raw API
size_t bufsize = SINGLE_SLOT_ALLOC_BUFLEN(PAGE_CNODE_SLOTS);
void *buf = malloc(bufsize);
assert(buf != NULL);
err = single_slot_alloc_init_raw(&si->pagecn_slot_alloc, si->pagecn_cap,
si->pagecn, PAGE_CNODE_SLOTS,
buf, bufsize);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_SINGLE_SLOT_ALLOC_INIT_RAW);
}
// Create root of pagetable
err = si->pagecn_slot_alloc.a.alloc(&si->pagecn_slot_alloc.a, &si->vtree);
if (err_is_fail(err)) {
return err_push(err, LIB_ERR_SLOT_ALLOC);
}
// top-level table should always live in slot 0 of pagecn
assert(si->vtree.slot == 0);
switch(si->cpu_type) {
case CPU_X86_64:
case CPU_K1OM:
err = vnode_create(si->vtree, ObjType_VNode_x86_64_pml4);
break;
case CPU_X86_32:
case CPU_SCC:
#ifdef CONFIG_PAE
err = vnode_create(si->vtree, ObjType_VNode_x86_32_pdpt);
#else
err = vnode_create(si->vtree, ObjType_VNode_x86_32_pdir);
#endif
break;
case CPU_ARM5:
case CPU_ARM7:
err = vnode_create(si->vtree, ObjType_VNode_ARM_l1);
break;
default:
assert(!"Other architecture");
return err_push(err, SPAWN_ERR_UNKNOWN_TARGET_ARCH);
}
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_CREATE_VNODE);
}
err = spawn_vspace_init(si, si->vtree, si->cpu_type);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_VSPACE_INIT);
}
return SYS_ERR_OK;
}
#if 0
/**
* \brief Lookup and map an image
*/
static errval_t spawn_map(const char *name, struct bootinfo *bi,
lvaddr_t *binary, size_t *binary_size)
{
errval_t err;
/* Get the module from the multiboot */
struct mem_region *module = multiboot_find_module(bi, name);
if (module == NULL) {
return SPAWN_ERR_FIND_MODULE;
}
/* Map the image */
err = spawn_map_module(module, binary_size, binary, NULL);
if (err_is_fail(err)) {
return err_push(err, SPAWN_ERR_MAP_MODULE);
}
return SYS_ERR_OK;
}
__private_extern__ int
nget_9p(mount_9p *nmp, fid_9p fid, qid_9p qid, vnode_t dvp, vnode_t *vpp, struct componentname *cnp, vfs_context_t ctx)
{
#pragma unused(ctx)
struct vnode_fsparam fsp;
struct hnode_9p *nhp;
node_9p *np;
uint32_t vid;
int e, i;
TRACE();
nhp = HASH9P(nmp, qid.path);
loop:
lck_mtx_lock(nmp->nodelck);
LIST_FOREACH (np, nhp, next) {
if(np->dir.qid.path != qid.path)
continue;
if (ISSET(np->flags, NODE_INIT)) {
SET(np->flags, NODE_WAITINIT);
msleep(np, nmp->nodelck, PINOD|PDROP, "nget_9p_init", NULL);
goto loop;
}
if (ISSET(np->flags, NODE_RECL)) {
SET(np->flags, NODE_WAITRECL);
msleep(np, nmp->nodelck, PINOD|PDROP, "nget_9p_reclaim", NULL);
goto loop;
}
vid = vnode_vid(np->vp);
lck_mtx_unlock(nmp->nodelck);
if (vnode_getwithvid(np->vp, vid))
goto loop;
nlock_9p(np, NODE_LCK_EXCLUSIVE);
if (dvp && cnp && ISSET(cnp->cn_flags, MAKEENTRY) && np->dir.qid.vers!=0) {
// DEBUG("caching %s", np->dir->name);
cache_enter(dvp, np->vp, cnp);
} else {
// DEBUG("not in cache qid=%d %s", qid.vers, np->dir->name);
}
*vpp = np->vp;
return 0;
}
if (fid == NOFID)
return EFAULT;
np = malloc_9p(sizeof(*np));
if (np == NULL) {
err0:
lck_mtx_unlock(nmp->nodelck);
return ENOMEM;
}
np->lck = lck_rw_alloc_init(lck_grp_9p, LCK_ATTR_NULL);
if (np->lck == NULL) {
free_9p(np);
goto err0;
}
np->nmp = nmp;
np->fid = fid;
np->dir.qid = qid;
for (i=0; i<3; i++)
np->openfid[i].fid = NOFID;
SET(np->flags, NODE_INIT);
LIST_INSERT_HEAD(nhp, np, next);
nlock_9p(np, NODE_LCK_EXCLUSIVE);
lck_mtx_unlock(nmp->nodelck);
if ((e=ngetdir_9p(np))) {
err1:
nunlock_9p(np);
lck_mtx_lock(nmp->nodelck);
LIST_REMOVE(np, next);
CLR(np->flags, NODE_INIT);
if (ISSET(np->flags, NODE_WAITINIT)) {
CLR(np->flags, NODE_WAITINIT);
wakeup(np);
}
lck_mtx_unlock(nmp->nodelck);
lck_rw_free(np->lck, lck_grp_9p);
free_9p(np);
return e;
}
fsp.vnfs_mp = nmp->mp;
fsp.vnfs_str = fsname;
fsp.vnfs_dvp = dvp;
fsp.vnfs_fsnode = np;
fsp.vnfs_vops = vnode_op_9p;
fsp.vnfs_markroot = dvp==NULL? TRUE: FALSE;
fsp.vnfs_marksystem = FALSE;
fsp.vnfs_filesize = np->dir.length;
fsp.vnfs_cnp = cnp;
fsp.vnfs_flags = VNFS_ADDFSREF;
dirvtype_9p(&np->dir, ISSET(nmp->flags, F_DOTU), &fsp.vnfs_vtype, &fsp.vnfs_rdev);
if (!dvp || !cnp || !ISSET(cnp->cn_flags, MAKEENTRY) || qid.vers==0)
SET(fsp.vnfs_flags, VNFS_NOCACHE);
if ((e=vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &fsp, &np->vp)))
goto err1;
vnode_settag(np->vp, VT_OTHER);
lck_mtx_lock(nmp->nodelck);
CLR(np->flags, NODE_INIT);
if (ISSET(np->flags, NODE_WAITINIT)) {
CLR(np->flags, NODE_WAITINIT);
wakeup(np);
}
lck_mtx_unlock(nmp->nodelck);
*vpp = np->vp;
return 0;
}
/*
* gfs_file_create(): create a new GFS file
*
* size - size of private data structure (v_data)
* pvp - parent vnode (GFS directory)
* ops - vnode operations vector
*
* In order to use this interface, the parent vnode must have been created by
* gfs_dir_create(), and the private data stored in v_data must have a
* 'gfs_file_t' as its first field.
*
* Given these constraints, this routine will automatically:
*
* - Allocate v_data for the vnode
* - Initialize necessary fields in the vnode
* - Hold the parent
*/
struct vnode *
gfs_file_create(size_t size, struct vnode *pvp, vfs_t *vfs, vnodeops_t *ops, enum vtype type, int flags)
{
gfs_file_t *fp;
struct vnode *vp;
struct vnode_fsparam vfsp;
dprintf("gfs_file_create: vtype %d\n", type);
/*
* Allocate vnode and internal data structure
*/
fp = kmem_zalloc(size, KM_SLEEP);
bzero(&vfsp, sizeof (vfsp));
vfsp.vnfs_str = "zfs";
vfsp.vnfs_mp = vfs;
vfsp.vnfs_vtype = type;
vfsp.vnfs_fsnode = fp;
vfsp.vnfs_flags = VNFS_ADDFSREF;
vfsp.vnfs_vops = ops;
if (flags & ZFS_VNODE_SYSTEM)
vfsp.vnfs_marksystem = 1;
if (flags & ZFS_VNODE_ROOT)
vfsp.vnfs_markroot = 1;
//error = getnewvnode("zfs", vfsp, ops, &vp);
ASSERT(error == 0);
//vn_lock(vp, /*LK_EXCLUSIVE |*/ LK_RETRY);
//vp->v_data = (caddr_t)fp;
//vnode_setfsnode(vp, fp);
//mutex_enter(&zfsvfs->z_vnode_create_lock);
while (vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &vp) != 0);
//mutex_exit(&zfsvfs->z_vnode_create_lock);
vnode_settag(vp, VT_ZFS);
dprintf("new vnode %p system %d root %d: vfs %p\n",
vp, vfsp.vnfs_marksystem, vfsp.vnfs_markroot, vfs);
/*
* Set up various pointers
*/
fp->gfs_ino = vnode_vid(vp);
fp->gfs_vnode = vp;
fp->gfs_parent = pvp;
fp->gfs_size = size;
fp->gfs_type = GFS_FILE;
//vp->v_vflag |= VV_FORCEINSMQ;
//error = insmntque(vp, vfsp);
//vp->v_vflag &= ~VV_FORCEINSMQ;
//KASSERT(error == 0, ("insmntque() failed: error %d", error));
/*
* Initialize vnode and hold parent.
*/
if (pvp) {
//printf("Skipping lock of parent %p\n", pvp);
VN_HOLD(pvp);
dprintf("parent hold pvp %p to 0 -> %d\n", pvp, ((uint32_t *)pvp)[23]);
}
return (vp);
}