static int do_open_image(struct cr_img *img, int dfd, int type, unsigned long oflags, char *path)
{
int ret, flags;
flags = oflags & ~(O_NOBUF | O_SERVICE);
ret = openat(dfd, path, flags, CR_FD_PERM);
if (ret < 0) {
if (!(flags & O_CREAT) && (errno == ENOENT)) {
pr_info("No %s image\n", path);
img->_x.fd = EMPTY_IMG_FD;
goto skip_magic;
}
pr_perror("Unable to open %s", path);
goto err;
}
img->_x.fd = ret;
if (oflags & O_NOBUF)
bfd_setraw(&img->_x);
else {
if (flags == O_RDONLY)
ret = bfdopenr(&img->_x);
else
ret = bfdopenw(&img->_x);
if (ret)
goto err;
}
if (imgset_template[type].magic == RAW_IMAGE_MAGIC)
goto skip_magic;
if (flags == O_RDONLY)
ret = img_check_magic(img, oflags, type, path);
else
ret = img_write_magic(img, oflags, type);
if (ret)
goto err;
skip_magic:
return 0;
err:
return -1;
}
static int do_open_image(struct cr_img *img, int dfd, int type, unsigned long oflags, char *path)
{
int ret, flags;
flags = oflags & ~(O_NOBUF | O_SERVICE | O_FORCE_LOCAL);
if (opts.remote && !(oflags & O_FORCE_LOCAL)) {
char *snapshot_id = NULL;
snapshot_id = get_snapshot_id_from_idx(dfd);
if (snapshot_id == NULL)
ret = -1;
else if (flags == O_RDONLY) {
pr_info("do_open_remote_image RDONLY path=%s snapshot_id=%s\n",
path, snapshot_id);
ret = read_remote_image_connection(snapshot_id, path);
} else {
pr_info("do_open_remote_image WDONLY path=%s snapshot_id=%s\n",
path, snapshot_id);
ret = write_remote_image_connection(snapshot_id, path, O_WRONLY);
}
} else
ret = openat(dfd, path, flags, CR_FD_PERM);
if (ret < 0) {
if (!(flags & O_CREAT) && (errno == ENOENT)) {
pr_info("No %s image\n", path);
img->_x.fd = EMPTY_IMG_FD;
goto skip_magic;
}
pr_perror("Unable to open %s", path);
goto err;
}
img->_x.fd = ret;
if (oflags & O_NOBUF)
bfd_setraw(&img->_x);
else {
if (flags == O_RDONLY)
ret = bfdopenr(&img->_x);
else
ret = bfdopenw(&img->_x);
if (ret)
goto err;
}
if (imgset_template[type].magic == RAW_IMAGE_MAGIC)
goto skip_magic;
if (flags == O_RDONLY)
ret = img_check_magic(img, oflags, type, path);
else
ret = img_write_magic(img, oflags, type);
if (ret)
goto err;
skip_magic:
return 0;
err:
return -1;
}
int parse_smaps(pid_t pid, struct vm_area_list *vma_area_list)
{
struct vma_area *vma_area = NULL;
unsigned long start, end, pgoff, prev_end = 0;
char r, w, x, s;
int ret = -1;
struct vma_file_info vfi;
struct vma_file_info prev_vfi = {};
DIR *map_files_dir = NULL;
struct bfd f;
vma_area_list->nr = 0;
vma_area_list->nr_aios = 0;
vma_area_list->longest = 0;
vma_area_list->priv_size = 0;
INIT_LIST_HEAD(&vma_area_list->h);
f.fd = open_proc(pid, "smaps");
if (f.fd < 0)
goto err_n;
if (bfdopenr(&f))
goto err_n;
map_files_dir = opendir_proc(pid, "map_files");
if (!map_files_dir) /* old kernel? */
goto err;
while (1) {
int num;
char file_path[32];
bool eof;
char *str;
str = breadline(&f);
if (IS_ERR(str))
goto err;
eof = (str == NULL);
if (!eof && !is_vma_range_fmt(str)) {
if (!strncmp(str, "Nonlinear", 9)) {
BUG_ON(!vma_area);
pr_err("Nonlinear mapping found %016"PRIx64"-%016"PRIx64"\n",
vma_area->e->start, vma_area->e->end);
/*
* VMA is already on list and will be
* freed later as list get destroyed.
*/
vma_area = NULL;
goto err;
} else if (!strncmp(str, "VmFlags: ", 9)) {
BUG_ON(!vma_area);
if (parse_vmflags(&str[9], vma_area))
goto err;
continue;
} else
continue;
}
if (vma_area && vma_list_add(vma_area, vma_area_list,
&prev_end, &vfi, &prev_vfi))
goto err;
if (eof)
break;
vma_area = alloc_vma_area();
if (!vma_area)
goto err;
memzero(file_path, sizeof(file_path));
num = sscanf(str, "%lx-%lx %c%c%c%c %lx %x:%x %lu %31s",
&start, &end, &r, &w, &x, &s, &pgoff,
&vfi.dev_maj, &vfi.dev_min, &vfi.ino, file_path);
if (num < 10) {
pr_err("Can't parse: %s\n", str);
goto err;
}
vma_area->e->start = start;
vma_area->e->end = end;
vma_area->e->pgoff = pgoff;
vma_area->e->prot = PROT_NONE;
if (r == 'r')
vma_area->e->prot |= PROT_READ;
if (w == 'w')
vma_area->e->prot |= PROT_WRITE;
if (x == 'x')
vma_area->e->prot |= PROT_EXEC;
if (s == 's')
vma_area->e->flags = MAP_SHARED;
else if (s == 'p')
vma_area->e->flags = MAP_PRIVATE;
else {
pr_err("Unexpected VMA met (%c)\n", s);
goto err;
}
if (handle_vma(pid, vma_area, file_path, map_files_dir,
&vfi, &prev_vfi, vma_area_list))
goto err;
}
vma_area = NULL;
ret = 0;
err:
bclose(&f);
err_n:
if (map_files_dir)
closedir(map_files_dir);
xfree(vma_area);
return ret;
}
int parse_pid_status(pid_t pid, struct proc_status_creds *cr)
{
struct bfd f;
int done = 0;
int ret = -1;
char *str;
f.fd = open_proc(pid, "status");
if (f.fd < 0) {
pr_perror("Can't open proc status");
return -1;
}
if (bfdopenr(&f))
return -1;
while (done < 9) {
str = breadline(&f);
if (str == NULL)
break;
if (IS_ERR(str))
goto err_parse;
if (!strncmp(str, "State:", 6)) {
cr->state = str[7];
done++;
}
if (!strncmp(str, "PPid:", 5)) {
if (sscanf(str, "PPid:\t%d", &cr->ppid) != 1) {
pr_err("Unable to parse: %s\n", str);
goto err_parse;
}
done++;
}
if (!strncmp(str, "Uid:", 4)) {
if (ids_parse(str + 5, cr->uids))
goto err_parse;
done++;
}
if (!strncmp(str, "Gid:", 4)) {
if (ids_parse(str + 5, cr->gids))
goto err_parse;
done++;
}
if (!strncmp(str, "CapInh:", 7)) {
if (cap_parse(str + 8, cr->cap_inh))
goto err_parse;
done++;
}
if (!strncmp(str, "CapEff:", 7)) {
if (cap_parse(str + 8, cr->cap_eff))
goto err_parse;
done++;
}
if (!strncmp(str, "CapPrm:", 7)) {
if (cap_parse(str + 8, cr->cap_prm))
goto err_parse;
done++;
}
if (!strncmp(str, "CapBnd:", 7)) {
if (cap_parse(str + 8, cr->cap_bnd))
goto err_parse;
done++;
}
if (!strncmp(str, "Seccomp:", 8)) {
if (sscanf(str + 9, "%d", &cr->seccomp_mode) != 1) {
goto err_parse;
}
if (cr->seccomp_mode == SECCOMP_MODE_FILTER) {
pr_err("SECCOMP_MODE_FILTER not currently supported\n");
goto err_parse;
}
done++;
}
}
if (done >= 8)
ret = 0;
err_parse:
if (ret)
pr_err("Error parsing proc status file\n");
bclose(&f);
return ret;
}
static int do_open_image(struct cr_img *img, int dfd, int type, unsigned long oflags, char *path)
{
int ret, flags;
flags = oflags & ~(O_NOBUF | O_SERVICE | O_FORCE_LOCAL);
/*
* For pages images dedup we need to open images read-write on
* restore, that may require proper capabilities, so we ask
* usernsd to do it for us
*/
if (root_ns_mask & CLONE_NEWUSER &&
type == CR_FD_PAGES && oflags & O_RDWR) {
struct openat_args pa = {
.flags = flags,
.err = 0,
.mode = CR_FD_PERM,
};
snprintf(pa.path, PATH_MAX, "%s", path);
ret = userns_call(userns_openat, UNS_FDOUT, &pa, sizeof(struct openat_args), dfd);
if (ret < 0)
errno = pa.err;
} else
ret = openat(dfd, path, flags, CR_FD_PERM);
if (ret < 0) {
if (!(flags & O_CREAT) && (errno == ENOENT || ret == -ENOENT)) {
pr_info("No %s image\n", path);
img->_x.fd = EMPTY_IMG_FD;
goto skip_magic;
}
pr_perror("Unable to open %s", path);
goto err;
}
img->_x.fd = ret;
if (oflags & O_NOBUF)
bfd_setraw(&img->_x);
else {
if (flags == O_RDONLY)
ret = bfdopenr(&img->_x);
else
ret = bfdopenw(&img->_x);
if (ret)
goto err;
}
if (imgset_template[type].magic == RAW_IMAGE_MAGIC)
goto skip_magic;
if (flags == O_RDONLY)
ret = img_check_magic(img, oflags, type, path);
else
ret = img_write_magic(img, oflags, type);
if (ret)
goto err;
skip_magic:
return 0;
err:
return -1;
}