void do_pb_show_plain(int fd, int type, int single_entry,
void (*payload_hadler)(int fd, void *obj),
const char *pretty_fmt)
{
pb_pr_ctl_t ctl = {NULL, single_entry, pretty_fmt};
void (*handle_payload)(int fd, void *obj);
if (!cr_pb_descs[type].pb_desc) {
pr_err("Wrong object requested %d\n", type);
return;
}
handle_payload = (payload_hadler) ? : pb_no_payload;
while (1) {
void *obj;
if (pb_read_one_eof(fd, &obj, type) <= 0)
break;
ctl.arg = (void *)cr_pb_descs[type].pb_desc;
pb_show_msg(obj, &ctl);
handle_payload(fd, obj);
cr_pb_descs[type].free(obj, NULL);
if (single_entry)
break;
pr_msg("\n");
}
}
int collect_image(struct collect_image_info *cinfo)
{
int fd, ret;
void *(*o_alloc)(size_t size) = malloc;
void (*o_free)(void *ptr) = free;
pr_info("Collecting %d/%d (flags %x)\n",
cinfo->fd_type, cinfo->pb_type, cinfo->flags);
fd = open_image(cinfo->fd_type, O_RSTR);
if (fd < 0) {
if ((cinfo->flags & COLLECT_OPTIONAL) && (errno == ENOENT))
return 0;
else
return -1;
}
if (cinfo->flags & COLLECT_SHARED) {
o_alloc = shmalloc;
o_free = shfree_last;
}
while (1) {
void *obj;
ProtobufCMessage *msg;
if (cinfo->priv_size) {
ret = -1;
obj = o_alloc(cinfo->priv_size);
if (!obj)
break;
} else
obj = NULL;
ret = pb_read_one_eof(fd, &msg, cinfo->pb_type);
if (ret <= 0) {
o_free(obj);
break;
}
ret = cinfo->collect(obj, msg);
if (ret < 0) {
o_free(obj);
cr_pb_descs[cinfo->pb_type].free(msg, NULL);
break;
}
if (!cinfo->priv_size)
cr_pb_descs[cinfo->pb_type].free(msg, NULL);
}
close(fd);
pr_debug(" `- ... done\n");
return ret;
}
int prepare_seccomp_filters(void)
{
struct cr_img *img;
int ret;
img = open_image(CR_FD_SECCOMP, O_RSTR);
if (!img)
return -1;
ret = pb_read_one_eof(img, &se, PB_SECCOMP);
close_image(img);
if (ret <= 0)
return 0; /* there were no filters */
BUG_ON(!se);
return 0;
}
static int copy_file_from_chunks(struct cr_img *img, int fd, size_t file_size)
{
if (ftruncate(fd, file_size) < 0) {
pr_perror("Can't make file size");
return -1;
}
while (1) {
int ret;
GhostChunkEntry *ce;
ret = pb_read_one_eof(img, &ce, PB_GHOST_CHUNK);
if (ret <= 0)
return ret;
if (copy_chunk_to_file(img_raw_fd(img), fd, ce->off, ce->len))
return -1;
ghost_chunk_entry__free_unpacked(ce, NULL);
}
}
static int __collect_image(int fd_t, int obj_t, unsigned size,
int (*collect)(void *obj, ProtobufCMessage *msg),
void * (*alloc)(size_t size),
void (*free)(void *ptr))
{
int fd, ret;
fd = open_image_ro(fd_t);
if (fd < 0)
return -1;
while (1) {
void *obj;
ProtobufCMessage *msg;
if (size) {
ret = -1;
obj = alloc(size);
if (!obj)
break;
} else
obj = NULL;
ret = pb_read_one_eof(fd, &msg, obj_t);
if (ret <= 0) {
free(obj);
break;
}
ret = collect(obj, msg);
if (ret < 0) {
free(obj);
cr_pb_descs[obj_t].free(msg, NULL);
break;
}
}
close(fd);
return ret;
}
static int prepare_ipc_shm(int pid)
{
int ret;
struct cr_img *img;
pr_info("Restoring IPC shared memory\n");
img = open_image(CR_FD_IPCNS_SHM, O_RSTR, pid);
if (!img)
return -1;
while (1) {
IpcShmEntry *shm;
ret = pb_read_one_eof(img, &shm, PB_IPC_SHM);
if (ret < 0) {
pr_err("Failed to read IPC shared memory segment\n");
ret = -EIO;
goto err;
}
if (ret == 0)
break;
pr_info_ipc_shm(shm);
ret = prepare_ipc_shm_seg(img, shm);
ipc_shm_entry__free_unpacked(shm, NULL);
if (ret < 0) {
pr_err("Failed to prepare shm segment\n");
goto err;
}
}
close_image(img);
return 0;
err:
close_image(img);
return ret;
}
static int prepare_ipc_msg(int pid)
{
int ret;
struct cr_img *img;
pr_info("Restoring IPC message queues\n");
img = open_image(CR_FD_IPCNS_MSG, O_RSTR, pid);
if (!img)
return -1;
while (1) {
IpcMsgEntry *msq;
ret = pb_read_one_eof(img, &msq, PB_IPCNS_MSG_ENT);
if (ret < 0) {
pr_err("Failed to read IPC messages queue\n");
ret = -EIO;
goto err;
}
if (ret == 0)
break;
pr_info_ipc_msg_entry(msq);
ret = prepare_ipc_msg_queue(img, msq);
ipc_msg_entry__free_unpacked(msq, NULL);
if (ret < 0) {
pr_err("Failed to prepare messages queue\n");
goto err;
}
}
close_image(img);
return 0;
err:
close_image(img);
return ret;
}
static int prepare_ipc_sem(int pid)
{
int ret;
struct cr_img *img;
pr_info("Restoring IPC semaphores sets\n");
img = open_image(CR_FD_IPCNS_SEM, O_RSTR, pid);
if (!img)
return -1;
while (1) {
IpcSemEntry *sem;
ret = pb_read_one_eof(img, &sem, PB_IPC_SEM);
if (ret < 0) {
ret = -EIO;
goto err;
}
if (ret == 0)
break;
pr_info_ipc_sem_entry(sem);
ret = prepare_ipc_sem_desc(img, sem);
ipc_sem_entry__free_unpacked(sem, NULL);
if (ret < 0) {
pr_err("Failed to prepare semaphores set\n");
goto err;
}
}
close_image(img);
return 0;
err:
close_image(img);
return ret;
}
int prepare_shmem_pid(int pid)
{
int fd, ret = -1;
VmaEntry *vi;
fd = open_image(CR_FD_VMAS, O_RSTR, pid);
if (fd < 0) {
if (errno == ENOENT)
return 0;
else
return -1;
}
while (1) {
ret = pb_read_one_eof(fd, &vi, PB_VMA);
if (ret <= 0)
break;
pr_info("vma 0x%"PRIx64" 0x%"PRIx64"\n", vi->start, vi->end);
if (!vma_entry_is(vi, VMA_ANON_SHARED) ||
vma_entry_is(vi, VMA_AREA_SYSVIPC)) {
vma_entry__free_unpacked(vi, NULL);
continue;
}
ret = collect_shmem(pid, vi);
vma_entry__free_unpacked(vi, NULL);
if (ret)
break;
}
close(fd);
return ret;
}
static int restore_shmem_content(void *addr, struct shmem_info *si)
{
int fd, fd_pg, ret = 0;
fd = open_image(CR_FD_SHMEM_PAGEMAP, O_RSTR, si->shmid);
if (fd < 0) {
fd_pg = open_image(CR_FD_SHM_PAGES_OLD, O_RSTR, si->shmid);
if (fd_pg < 0)
goto err_unmap;
} else {
fd_pg = open_pages_image(O_RSTR, fd);
if (fd_pg < 0)
goto out_close;
}
while (1) {
unsigned long vaddr;
unsigned nr_pages;
if (fd >= 0) {
PagemapEntry *pe;
ret = pb_read_one_eof(fd, &pe, PB_PAGEMAP);
if (ret <= 0)
break;
vaddr = (unsigned long)decode_pointer(pe->vaddr);
nr_pages = pe->nr_pages;
pagemap_entry__free_unpacked(pe, NULL);
} else {
__u64 img_vaddr;
ret = read_img_eof(fd_pg, &img_vaddr);
if (ret <= 0)
break;
vaddr = (unsigned long)decode_pointer(img_vaddr);
nr_pages = 1;
}
if (vaddr + nr_pages * PAGE_SIZE > si->size)
break;
ret = read(fd_pg, addr + vaddr, nr_pages * PAGE_SIZE);
if (ret != nr_pages * PAGE_SIZE) {
ret = -1;
break;
}
}
close_safe(&fd_pg);
close_safe(&fd);
return ret;
out_close:
close_safe(&fd);
err_unmap:
munmap(addr, si->size);
return -1;
}