int ceph_crypto_key_encode(struct ceph_crypto_key *key, void **p, void *end)
{
if (*p + sizeof(u16) + sizeof(key->created) +
sizeof(u16) + key->len > end)
return -ERANGE;
ceph_encode_16(p, key->type);
ceph_encode_copy(p, &key->created, sizeof(key->created));
ceph_encode_16(p, key->len);
ceph_encode_copy(p, key->key, key->len);
return 0;
}
int ceph_entity_name_encode(const char *name, void **p, void *end)
{
int len = strlen(name);
if (*p + 2*sizeof(u32) + len > end)
return -ERANGE;
ceph_encode_32(p, CEPH_ENTITY_TYPE_CLIENT);
ceph_encode_32(p, len);
ceph_encode_copy(p, name, len);
return 0;
}
/**
* ceph_cls_break_lock - release rados lock for object for specified client
* @oid, @oloc: object to lock
* @lock_name: the name of the lock
* @cookie: user-defined identifier for this instance of the lock
* @locker: current lock owner
*/
int ceph_cls_break_lock(struct ceph_osd_client *osdc,
struct ceph_object_id *oid,
struct ceph_object_locator *oloc,
char *lock_name, char *cookie,
struct ceph_entity_name *locker)
{
int break_op_buf_size;
int name_len = strlen(lock_name);
int cookie_len = strlen(cookie);
struct page *break_op_page;
void *p, *end;
int ret;
break_op_buf_size = name_len + sizeof(__le32) +
cookie_len + sizeof(__le32) +
sizeof(u8) + sizeof(__le64) +
CEPH_ENCODING_START_BLK_LEN;
if (break_op_buf_size > PAGE_SIZE)
return -E2BIG;
break_op_page = alloc_page(GFP_NOIO);
if (!break_op_page)
return -ENOMEM;
p = page_address(break_op_page);
end = p + break_op_buf_size;
/* encode cls_lock_break_op struct */
ceph_start_encoding(&p, 1, 1,
break_op_buf_size - CEPH_ENCODING_START_BLK_LEN);
ceph_encode_string(&p, end, lock_name, name_len);
ceph_encode_copy(&p, locker, sizeof(*locker));
ceph_encode_string(&p, end, cookie, cookie_len);
dout("%s lock_name %s cookie %s locker %s%llu\n", __func__, lock_name,
cookie, ENTITY_NAME(*locker));
ret = ceph_osdc_call(osdc, oid, oloc, "lock", "break_lock",
CEPH_OSD_FLAG_WRITE, break_op_page,
break_op_buf_size, NULL, NULL);
dout("%s: status %d\n", __func__, ret);
__free_page(break_op_page);
return ret;
}
