/*
* pmemobj_type_num -- returns type number of object
*/
int
pmemobj_type_num(PMEMoid oid)
{
LOG(3, "oid.off 0x%016jx", oid.off);
if (OBJ_OID_IS_NULL(oid))
return -1;
void *ptr = pmemobj_direct(oid);
struct oob_header *oobh = OOB_HEADER_FROM_PTR(ptr);
return oobh->data.user_type;
}
/*
* obj_realloc_common -- (internal) common routine for resizing
* existing objects
*/
static int
obj_realloc_common(PMEMobjpool *pop, struct object_store *store,
PMEMoid *oidp, size_t size, unsigned int type_num,
void (*constr_alloc)(PMEMobjpool *pop, void *ptr, void *arg),
void (*constr_realloc)(PMEMobjpool *pop, void *ptr, void *arg))
{
/* if OID is NULL just allocate memory */
if (OBJ_OID_IS_NULL(*oidp)) {
struct carg_alloc carg;
carg.size = size;
/* if size is 0 - do nothing */
if (size == 0)
return 0;
return obj_alloc_construct(pop, oidp, size, type_num,
constr_alloc, &carg);
}
if (size > PMEMOBJ_MAX_ALLOC_SIZE) {
ERR("requested size too large");
errno = ENOMEM;
return -1;
}
/* if size is 0 just free */
if (size == 0) {
obj_free(pop, oidp);
return 0;
}
struct carg_realloc carg;
carg.ptr = OBJ_OFF_TO_PTR(pop, oidp->off);
carg.new_size = size;
carg.old_size = pmemobj_alloc_usable_size(*oidp);
carg.user_type = type_num;
carg.constructor = NULL;
carg.arg = NULL;
struct oob_header *pobj = OOB_HEADER_FROM_OID(pop, *oidp);
uint16_t user_type_old = pobj->data.user_type;
ASSERT(user_type_old < PMEMOBJ_NUM_OID_TYPES);
if (type_num >= PMEMOBJ_NUM_OID_TYPES) {
errno = EINVAL;
ERR("!obj_realloc_construct");
LOG(2, "type_num has to be in range [0, %u]",
PMEMOBJ_NUM_OID_TYPES - 1);
return -1;
}
struct list_head *lhead_old = &store->bytype[user_type_old].head;
if (type_num == user_type_old) {
int ret = list_realloc(pop, lhead_old, 0, NULL, size,
constr_realloc, &carg, 0, 0, oidp);
if (ret)
LOG(2, "list_realloc failed");
return ret;
} else {
struct list_head *lhead_new = &store->bytype[type_num].head;
/*
* Redo log updates 8 byte entries, so we have to prepare
* full 8-byte value even if we want to update smaller field
* (here: user_type).
*/
struct oob_header_data d = pobj->data;
d.user_type = type_num;
uint64_t data_offset = OOB_OFFSET_OF(*oidp, data);
int ret = list_realloc_move(pop, lhead_old, lhead_new, 0, NULL,
size, constr_realloc, &carg, data_offset,
*((uint64_t *)&d), oidp);
if (ret)
LOG(2, "list_realloc_move failed");
return ret;
}
}
/*
* obj_realloc_common -- (internal) common routine for resizing
* existing objects
*/
static int
obj_realloc_common(PMEMobjpool *pop, struct object_store *store,
PMEMoid *oidp, size_t size, type_num_t type_num, int zero_init)
{
/* if OID is NULL just allocate memory */
if (OBJ_OID_IS_NULL(*oidp)) {
/* if size is 0 - do nothing */
if (size == 0)
return 0;
return obj_alloc_construct(pop, oidp, size, type_num,
zero_init, NULL, NULL);
}
if (size > PMEMOBJ_MAX_ALLOC_SIZE) {
ERR("requested size too large");
errno = ENOMEM;
return -1;
}
/* if size is 0 just free */
if (size == 0) {
obj_free(pop, oidp);
return 0;
}
struct carg_realloc carg;
carg.ptr = OBJ_OFF_TO_PTR(pop, oidp->off);
carg.new_size = size;
carg.old_size = pmemobj_alloc_usable_size(*oidp);
carg.user_type = type_num;
carg.constructor = NULL;
carg.arg = NULL;
carg.zero_init = zero_init;
struct oob_header *pobj = OOB_HEADER_FROM_OID(pop, *oidp);
type_num_t user_type_old = pobj->data.user_type;
/* callers should have checked this */
ASSERT(type_num < PMEMOBJ_NUM_OID_TYPES);
ASSERT(user_type_old < PMEMOBJ_NUM_OID_TYPES);
struct list_head *lhead_old = &store->bytype[user_type_old].head;
if (type_num == user_type_old) {
int ret = list_realloc(pop, lhead_old, 0, NULL, size,
constructor_realloc, &carg, 0, 0, oidp);
if (ret)
LOG(2, "list_realloc failed");
/* oidp could be different, so we need to get the ptr again */
VALGRIND_DO_MAKE_MEM_NOACCESS(pop,
&OOB_HEADER_FROM_OID(pop, *oidp)->data.padding,
sizeof (OOB_HEADER_FROM_OID(pop, *oidp)->data.padding));
return ret;
} else {
struct list_head *lhead_new = &store->bytype[type_num].head;
/*
* Header padding doubles as a red zone to check for header
* overwrites. Disable it temporarily so we can modify the type
* number.
*/
VALGRIND_DO_MAKE_MEM_DEFINED(pop,
&OOB_HEADER_FROM_OID(pop, *oidp)->data.padding,
sizeof (OOB_HEADER_FROM_OID(pop, *oidp)->data.padding));
/*
* Redo log updates 8 byte entries, so we have to prepare
* full 8-byte value even if we want to update smaller field
* (here: user_type).
*/
struct oob_header_data d = pobj->data;
d.user_type = type_num;
uint64_t data_offset = OOB_OFFSET_OF(*oidp, data);
int ret = list_realloc_move(pop, lhead_old, lhead_new, 0, NULL,
size, constructor_realloc, &carg, data_offset,
*((uint64_t *)&d), oidp);
if (ret)
LOG(2, "list_realloc_move failed");
/* oidp could be different, so we need to get the ptr again */
VALGRIND_DO_MAKE_MEM_NOACCESS(pop,
&OOB_HEADER_FROM_OID(pop, *oidp)->data.padding,
sizeof (OOB_HEADER_FROM_OID(pop, *oidp)->data.padding));
return ret;
}
}
