int read_config_file(struct config_tree *cft)
{
struct cs *c = (struct cs *) cft;
struct stat info;
int r = 1;
if (stat(c->filename, &info)) {
log_sys_error("stat", c->filename);
c->exists = 0;
return 0;
}
if (!S_ISREG(info.st_mode)) {
log_error("%s is not a regular file", c->filename);
c->exists = 0;
return 0;
}
c->exists = 1;
if (info.st_size == 0) {
log_verbose("%s is empty", c->filename);
return 1;
}
if (!c->dev) {
if (!(c->dev = dev_create_file(c->filename, NULL, NULL, 1)))
return_0;
if (!dev_open_readonly_buffered(c->dev)) {
c->dev = 0;
return_0;
}
}
r = read_config_fd(cft, c->dev, 0, (size_t) info.st_size, 0, 0,
(checksum_fn_t) NULL, 0);
if (!c->keep_open) {
dev_close(c->dev);
c->dev = 0;
}
c->timestamp = info.st_ctime;
c->st_size = info.st_size;
return r;
}
struct volume_group *text_vg_import_fd(struct format_instance *fid,
const char *file,
struct device *dev,
off_t offset, uint32_t size,
off_t offset2, uint32_t size2,
checksum_fn_t checksum_fn,
uint32_t checksum,
time_t *when, char **desc)
{
struct volume_group *vg = NULL;
struct config_tree *cft;
struct text_vg_version_ops **vsn;
_init_text_import();
*desc = NULL;
*when = 0;
if (!(cft = create_config_tree(file, 0)))
return_NULL;
if ((!dev && !read_config_file(cft)) ||
(dev && !read_config_fd(cft, dev, offset, size,
offset2, size2, checksum_fn, checksum))) {
log_error("Couldn't read volume group metadata.");
goto out;
}
/*
* Find a set of version functions that can read this file
*/
for (vsn = &_text_vsn_list[0]; *vsn; vsn++) {
if (!(*vsn)->check_version(cft))
continue;
if (!(vg = (*vsn)->read_vg(fid, cft, 0)))
goto_out;
(*vsn)->read_desc(vg->vgmem, cft, when, desc);
break;
}
out:
destroy_config_tree(cft);
return vg;
}
const char *text_vgname_import(const struct format_type *fmt,
struct device *dev,
off_t offset, uint32_t size,
off_t offset2, uint32_t size2,
checksum_fn_t checksum_fn, uint32_t checksum,
struct id *vgid, uint64_t *vgstatus,
char **creation_host)
{
struct config_tree *cft;
struct text_vg_version_ops **vsn;
const char *vgname = NULL;
_init_text_import();
if (!(cft = create_config_tree(NULL, 0)))
return_NULL;
if ((!dev && !read_config_file(cft)) ||
(dev && !read_config_fd(cft, dev, offset, size,
offset2, size2, checksum_fn, checksum)))
goto_out;
/*
* Find a set of version functions that can read this file
*/
for (vsn = &_text_vsn_list[0]; *vsn; vsn++) {
if (!(*vsn)->check_version(cft))
continue;
if (!(vgname = (*vsn)->read_vgname(fmt, cft, vgid, vgstatus,
creation_host)))
goto_out;
break;
}
out:
destroy_config_tree(cft);
return vgname;
}