int vn_fromfd(int fd, char *path, int flags, struct vnode **vpp, boolean_t fromfd)
{
vnode_t *vp;
*vpp = vp = kmem_cache_alloc(vnode_cache, KM_SLEEP);
memset(vp, 0, sizeof(vnode_t));
if (fstat64(fd, &vp->v_stat) == -1) {
close(fd);
return (errno);
}
(void) fcntl(fd, F_SETFD, FD_CLOEXEC);
vp->v_fd = fd;
if(S_ISBLK(vp->v_stat.st_mode)) {
/* LINUX */
if(ioctl(fd, BLKGETSIZE64, &vp->v_size) != 0)
return errno;
} else
vp->v_size = vp->v_stat.st_size;
vp->v_path = strdup(path);
vp->v_type = VNON;
if(fromfd)
vn_setops(vp, fd_fvnodeops);
else
vn_setops(vp, root_fvnodeops);
if(S_ISREG(vp->v_stat.st_mode)) {
vp->v_type = VREG;
if (flags & FREAD)
atomic_add_32(&((*vpp)->v_rdcnt), 1);
if (flags & FWRITE)
atomic_add_32(&((*vpp)->v_wrcnt), 1);
} else if(S_ISDIR(vp->v_stat.st_mode))
vp->v_type = VDIR;
else if(S_ISCHR(vp->v_stat.st_mode))
vp->v_type = VCHR;
else if(S_ISBLK(vp->v_stat.st_mode))
vp->v_type = VBLK;
else if(S_ISFIFO(vp->v_stat.st_mode))
vp->v_type = VFIFO;
else if(S_ISLNK(vp->v_stat.st_mode))
vp->v_type = VLNK;
else if(S_ISSOCK(vp->v_stat.st_mode))
vp->v_type = VSOCK;
VERIFY(vp->v_type != VNON);
zmutex_init(&vp->v_lock);
rwst_init(&vp->v_vfsmhlock.ve_lock, NULL, RW_DEFAULT, NULL);
vp->v_count = 1;
vp->v_vfsp = rootvfs;
/*fprintf(stderr, "VNode %p created at vn_open (%s)\n", *vpp, path);*/
return (0);
}
vnode_t *vn_alloc(int kmflag)
{
ASSERT(kmflag == 0 || kmflag == UMEM_NOFAIL);
vnode_t *vp;
vp = kmem_cache_alloc(vnode_cache, kmflag);
/* taken from vn_cache_constructor */
mutex_init(&vp->v_lock, NULL, MUTEX_DEFAULT, NULL);
rwst_init(&vp->v_vfsmhlock.ve_lock, NULL, RW_DEFAULT, NULL);
if(vp != NULL) {
vp->v_path = NULL;
vp->v_data = NULL;
vn_reinit(vp);
}
/*fprintf(stderr, "VNode %p alloc'ed\n", vp);*/
return vp;
}
