int rumpuser_close(int fd) { int rfd = fd - BLKFDOFF; if (rfd < 0 || rfd+1 > NBLKDEV) return EBADF; if (--blkopen[rfd] == 0) { struct blkfront_dev *toclose = blkdevs[rfd]; /* not sure if this appropriately prevents races either ... */ blkdevs[rfd] = NULL; shutdown_blkfront(toclose); } return 0; }
void kexec(void *kernel, long kernel_size, void *module, long module_size, char *cmdline, unsigned long flags) { struct xc_dom_image *dom; int rc; domid_t domid = DOMID_SELF; xen_pfn_t pfn; xc_interface *xc_handle; unsigned long i; void *seg; xen_pfn_t boot_page_mfn = virt_to_mfn(&_boot_page); char features[] = ""; struct mmu_update *m2p_updates; unsigned long nr_m2p_updates; DEBUG("booting with cmdline %s\n", cmdline); xc_handle = xc_interface_open(0,0,0); dom = xc_dom_allocate(xc_handle, cmdline, features); dom->allocate = kexec_allocate; /* We are using guest owned memory, therefore no limits. */ xc_dom_kernel_max_size(dom, 0); xc_dom_ramdisk_max_size(dom, 0); dom->kernel_blob = kernel; dom->kernel_size = kernel_size; dom->ramdisk_blob = module; dom->ramdisk_size = module_size; dom->flags = flags; dom->console_evtchn = start_info.console.domU.evtchn; dom->xenstore_evtchn = start_info.store_evtchn; tpm_hash2pcr(dom, cmdline); if ( (rc = xc_dom_boot_xen_init(dom, xc_handle, domid)) != 0 ) { grub_printf("xc_dom_boot_xen_init returned %d\n", rc); errnum = ERR_BOOT_FAILURE; goto out; } if ( (rc = xc_dom_parse_image(dom)) != 0 ) { grub_printf("xc_dom_parse_image returned %d\n", rc); errnum = ERR_BOOT_FAILURE; goto out; } #ifdef __i386__ if (strcmp(dom->guest_type, "xen-3.0-x86_32p")) { grub_printf("can only boot x86 32 PAE kernels, not %s\n", dom->guest_type); errnum = ERR_EXEC_FORMAT; goto out; } #endif #ifdef __x86_64__ if (strcmp(dom->guest_type, "xen-3.0-x86_64")) { grub_printf("can only boot x86 64 kernels, not %s\n", dom->guest_type); errnum = ERR_EXEC_FORMAT; goto out; } #endif /* equivalent of xc_dom_mem_init */ dom->arch_hooks = xc_dom_find_arch_hooks(xc_handle, dom->guest_type); dom->total_pages = start_info.nr_pages; /* equivalent of arch_setup_meminit */ /* setup initial p2m */ dom->p2m_host = malloc(sizeof(*dom->p2m_host) * dom->total_pages); /* Start with our current P2M */ for (i = 0; i < dom->total_pages; i++) dom->p2m_host[i] = pfn_to_mfn(i); if ( (rc = xc_dom_build_image(dom)) != 0 ) { grub_printf("xc_dom_build_image returned %d\n", rc); errnum = ERR_BOOT_FAILURE; goto out; } /* copy hypercall page */ /* TODO: domctl instead, but requires privileges */ if (dom->parms.virt_hypercall != -1) { pfn = PHYS_PFN(dom->parms.virt_hypercall - dom->parms.virt_base); memcpy((void *) pages[pfn], hypercall_page, PAGE_SIZE); } /* Equivalent of xc_dom_boot_image */ dom->shared_info_mfn = PHYS_PFN(start_info.shared_info); if (!xc_dom_compat_check(dom)) { grub_printf("xc_dom_compat_check failed\n"); errnum = ERR_EXEC_FORMAT; goto out; } /* Move current console, xenstore and boot MFNs to the allocated place */ do_exchange(dom, dom->console_pfn, start_info.console.domU.mfn); do_exchange(dom, dom->xenstore_pfn, start_info.store_mfn); DEBUG("virt base at %llx\n", dom->parms.virt_base); DEBUG("bootstack_pfn %lx\n", dom->bootstack_pfn); _boot_target = dom->parms.virt_base + PFN_PHYS(dom->bootstack_pfn); DEBUG("_boot_target %lx\n", _boot_target); do_exchange(dom, PHYS_PFN(_boot_target - dom->parms.virt_base), virt_to_mfn(&_boot_page)); /* Make sure the bootstrap page table does not RW-map any of our current * page table frames */ kexec_allocate(dom, dom->virt_pgtab_end); if ( (rc = xc_dom_update_guest_p2m(dom))) { grub_printf("xc_dom_update_guest_p2m returned %d\n", rc); errnum = ERR_BOOT_FAILURE; goto out; } if ( dom->arch_hooks->setup_pgtables ) if ( (rc = dom->arch_hooks->setup_pgtables(dom))) { grub_printf("setup_pgtables returned %d\n", rc); errnum = ERR_BOOT_FAILURE; goto out; } /* start info page */ #undef start_info if ( dom->arch_hooks->start_info ) dom->arch_hooks->start_info(dom); #define start_info (start_info_union.start_info) xc_dom_log_memory_footprint(dom); /* Unmap libxc's projection of the boot page table */ seg = xc_dom_seg_to_ptr(dom, &dom->pgtables_seg); munmap(seg, dom->pgtables_seg.vend - dom->pgtables_seg.vstart); /* Unmap day0 pages to avoid having a r/w mapping of the future page table */ for (pfn = 0; pfn < allocated; pfn++) munmap((void*) pages[pfn], PAGE_SIZE); /* Pin the boot page table base */ if ( (rc = pin_table(dom->xch, #ifdef __i386__ MMUEXT_PIN_L3_TABLE, #endif #ifdef __x86_64__ MMUEXT_PIN_L4_TABLE, #endif xc_dom_p2m_host(dom, dom->pgtables_seg.pfn), dom->guest_domid)) != 0 ) { grub_printf("pin_table(%lx) returned %d\n", xc_dom_p2m_host(dom, dom->pgtables_seg.pfn), rc); errnum = ERR_BOOT_FAILURE; goto out_remap; } /* We populate the Mini-OS page table here so that boot.S can just call * update_va_mapping to project itself there. */ need_pgt(_boot_target); DEBUG("day0 pages %lx\n", allocated); DEBUG("boot target page %lx\n", _boot_target); DEBUG("boot page %p\n", &_boot_page); DEBUG("boot page mfn %lx\n", boot_page_mfn); _boot_page_entry = PFN_PHYS(boot_page_mfn) | L1_PROT; DEBUG("boot page entry %llx\n", _boot_page_entry); _boot_oldpdmfn = virt_to_mfn(start_info.pt_base); DEBUG("boot old pd mfn %lx\n", _boot_oldpdmfn); DEBUG("boot pd virt %lx\n", dom->pgtables_seg.vstart); _boot_pdmfn = dom->p2m_host[PHYS_PFN(dom->pgtables_seg.vstart - dom->parms.virt_base)]; DEBUG("boot pd mfn %lx\n", _boot_pdmfn); _boot_stack = _boot_target + PAGE_SIZE; DEBUG("boot stack %lx\n", _boot_stack); _boot_start_info = dom->parms.virt_base + PFN_PHYS(dom->start_info_pfn); DEBUG("boot start info %lx\n", _boot_start_info); _boot_start = dom->parms.virt_entry; DEBUG("boot start %lx\n", _boot_start); /* Keep only useful entries */ for (nr_m2p_updates = pfn = 0; pfn < start_info.nr_pages; pfn++) if (dom->p2m_host[pfn] != pfn_to_mfn(pfn)) nr_m2p_updates++; m2p_updates = malloc(sizeof(*m2p_updates) * nr_m2p_updates); for (i = pfn = 0; pfn < start_info.nr_pages; pfn++) if (dom->p2m_host[pfn] != pfn_to_mfn(pfn)) { m2p_updates[i].ptr = PFN_PHYS(dom->p2m_host[pfn]) | MMU_MACHPHYS_UPDATE; m2p_updates[i].val = pfn; i++; } for (i = 0; i < blk_nb; i++) shutdown_blkfront(blk_dev[i]); if (net_dev) shutdown_netfront(net_dev); if (kbd_dev) shutdown_kbdfront(kbd_dev); stop_kernel(); /* Update M2P */ if ((rc = HYPERVISOR_mmu_update(m2p_updates, nr_m2p_updates, NULL, DOMID_SELF)) < 0) { xprintk("Could not update M2P\n"); ASSERT(0); } xprintk("go!\n"); /* Jump to trampoline boot page */ _boot(); ASSERT(0); out_remap: for (pfn = 0; pfn < allocated; pfn++) do_map_frames(pages[pfn], &pages_mfns[pfn], 1, 0, 0, DOMID_SELF, 0, L1_PROT); out: xc_dom_release(dom); for (pfn = 0; pfn < allocated; pfn++) free_page((void*)pages[pfn]); free(pages); free(pages_mfns); pages = NULL; pages_mfns = NULL; allocated = 0; xc_interface_close(xc_handle ); }
int close(int fd) { printk("close(%d)\n", fd); switch (files[fd].type) { default: files[fd].type = FTYPE_NONE; return 0; #ifdef CONFIG_XENBUS case FTYPE_XENBUS: xs_daemon_close((void*)(intptr_t) fd); return 0; #endif #ifdef HAVE_LWIP case FTYPE_SOCKET: { int res = lwip_close(files[fd].socket.fd); files[fd].type = FTYPE_NONE; return res; } #endif #ifdef CONFIG_XC case FTYPE_XC: minios_interface_close_fd(fd); return 0; case FTYPE_EVTCHN: minios_evtchn_close_fd(fd); return 0; case FTYPE_GNTMAP: minios_gnttab_close_fd(fd); return 0; #endif #ifdef CONFIG_NETFRONT case FTYPE_TAP: shutdown_netfront(files[fd].tap.dev); files[fd].type = FTYPE_NONE; return 0; #endif #ifdef CONFIG_BLKFRONT case FTYPE_BLK: shutdown_blkfront(files[fd].blk.dev); files[fd].type = FTYPE_NONE; return 0; #endif #ifdef CONFIG_TPMFRONT case FTYPE_TPMFRONT: shutdown_tpmfront(files[fd].tpmfront.dev); files[fd].type = FTYPE_NONE; return 0; #endif #ifdef CONFIG_TPM_TIS case FTYPE_TPM_TIS: shutdown_tpm_tis(files[fd].tpm_tis.dev); files[fd].type = FTYPE_NONE; return 0; #endif #ifdef CONFIG_KBDFRONT case FTYPE_KBD: shutdown_kbdfront(files[fd].kbd.dev); files[fd].type = FTYPE_NONE; return 0; #endif #ifdef CONFIG_FBFRONT case FTYPE_FB: shutdown_fbfront(files[fd].fb.dev); files[fd].type = FTYPE_NONE; return 0; #endif #ifdef CONFIG_CONSFRONT case FTYPE_SAVEFILE: case FTYPE_CONSOLE: fini_console(files[fd].cons.dev); files[fd].type = FTYPE_NONE; return 0; #endif case FTYPE_NONE: break; } printk("close(%d): Bad descriptor\n", fd); errno = EBADF; return -1; }
int close(int fd) { printk("close(%d)\n", fd); if (fd < 0 || fd > NOFILE) { errno = EBADF; return -1; } switch (files[fd].type) { default: files[fd].type = FTYPE_NONE; return 0; case FTYPE_XENBUS: xs_daemon_close((void*)(intptr_t) fd); return 0; #ifdef HAVE_LWIP case FTYPE_SOCKET: { int res = lwip_close(files[fd].socket.fd); files[fd].type = FTYPE_NONE; return res; } #endif case FTYPE_XC: minios_interface_close_fd(fd); return 0; case FTYPE_EVTCHN: minios_evtchn_close_fd(fd); return 0; case FTYPE_GNTMAP: printk("close gntmap fd %d; gntmap %p, %d entries\n", fd, files[fd].gntmap.entries, files[fd].gntmap.nentries); minios_gnttab_close_fd(fd); return 0; case FTYPE_TAP: shutdown_netfront(files[fd].tap.dev); files[fd].type = FTYPE_NONE; return 0; case FTYPE_BLK: shutdown_blkfront(files[fd].blk.dev); files[fd].type = FTYPE_NONE; return 0; case FTYPE_KBD: shutdown_kbdfront(files[fd].kbd.dev); files[fd].type = FTYPE_NONE; return 0; case FTYPE_FB: shutdown_fbfront(files[fd].fb.dev); files[fd].type = FTYPE_NONE; return 0; case FTYPE_SAVEFILE: case FTYPE_CONSOLE: fini_console(files[fd].cons.dev); files[fd].type = FTYPE_NONE; return 0; case FTYPE_NONE: break; } printk("close(%d): Bad descriptor\n", fd); errno = EBADF; return -1; }