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lib: introduce initial implementation of object aggregation manager

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This lib tracks objects which could be of two types:
1) root object
2) nested object - with a "delta" which differentiates it from
                   the associated root object
The objects are tracked by a hashtable and reference-counted. User is
responsible of implementing callbacks to create/destroy root entity
related to each root object and callback to create/destroy nested object
delta.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2018-11-14 08:22:28 +00:00 committed by David S. Miller
parent 7dc5a0eeea
commit 0a020d416d
8 changed files with 1633 additions and 0 deletions
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8
MAINTAINERS
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@ -10679,6 +10679,14 @@ L: linux-nfc@lists.01.org (moderated for non-subscribers)
S: Supported S: Supported
F: drivers/nfc/nxp-nci F: drivers/nfc/nxp-nci
OBJAGG
M: Jiri Pirko <jiri@mellanox.com>
L: netdev@vger.kernel.org
S: Supported
F: lib/objagg.c
F: lib/test_objagg.c
F: include/linux/objagg.h
OBJTOOL OBJTOOL
M: Josh Poimboeuf <jpoimboe@redhat.com> M: Josh Poimboeuf <jpoimboe@redhat.com>
M: Peter Zijlstra <peterz@infradead.org> M: Peter Zijlstra <peterz@infradead.org>

46
include/linux/objagg.h Normal file
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@ -0,0 +1,46 @@
/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
#ifndef _OBJAGG_H
#define _OBJAGG_H
struct objagg_ops {
size_t obj_size;
void * (*delta_create)(void *priv, void *parent_obj, void *obj);
void (*delta_destroy)(void *priv, void *delta_priv);
void * (*root_create)(void *priv, void *obj);
void (*root_destroy)(void *priv, void *root_priv);
};
struct objagg;
struct objagg_obj;
const void *objagg_obj_root_priv(const struct objagg_obj *objagg_obj);
const void *objagg_obj_delta_priv(const struct objagg_obj *objagg_obj);
const void *objagg_obj_raw(const struct objagg_obj *objagg_obj);
struct objagg_obj *objagg_obj_get(struct objagg *objagg, void *obj);
void objagg_obj_put(struct objagg *objagg, struct objagg_obj *objagg_obj);
struct objagg *objagg_create(const struct objagg_ops *ops, void *priv);
void objagg_destroy(struct objagg *objagg);
struct objagg_obj_stats {
unsigned int user_count;
unsigned int delta_user_count; /* includes delta object users */
};
struct objagg_obj_stats_info {
struct objagg_obj_stats stats;
struct objagg_obj *objagg_obj; /* associated object */
bool is_root;
};
struct objagg_stats {
unsigned int stats_info_count;
struct objagg_obj_stats_info stats_info[];
};
const struct objagg_stats *objagg_stats_get(struct objagg *objagg);
void objagg_stats_put(const struct objagg_stats *objagg_stats);
#endif

228
include/trace/events/objagg.h Normal file
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@ -0,0 +1,228 @@
/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM objagg
#if !defined(__TRACE_OBJAGG_H) || defined(TRACE_HEADER_MULTI_READ)
#define __TRACE_OBJAGG_H
#include <linux/tracepoint.h>
struct objagg;
struct objagg_obj;
TRACE_EVENT(objagg_create,
TP_PROTO(const struct objagg *objagg),
TP_ARGS(objagg),
TP_STRUCT__entry(
__field(const void *, objagg)
),
TP_fast_assign(
__entry->objagg = objagg;
),
TP_printk("objagg %p", __entry->objagg)
);
TRACE_EVENT(objagg_destroy,
TP_PROTO(const struct objagg *objagg),
TP_ARGS(objagg),
TP_STRUCT__entry(
__field(const void *, objagg)
),
TP_fast_assign(
__entry->objagg = objagg;
),
TP_printk("objagg %p", __entry->objagg)
);
TRACE_EVENT(objagg_obj_create,
TP_PROTO(const struct objagg *objagg,
const struct objagg_obj *obj),
TP_ARGS(objagg, obj),
TP_STRUCT__entry(
__field(const void *, objagg)
__field(const void *, obj)
),
TP_fast_assign(
__entry->objagg = objagg;
__entry->obj = obj;
),
TP_printk("objagg %p, obj %p", __entry->objagg, __entry->obj)
);
TRACE_EVENT(objagg_obj_destroy,
TP_PROTO(const struct objagg *objagg,
const struct objagg_obj *obj),
TP_ARGS(objagg, obj),
TP_STRUCT__entry(
__field(const void *, objagg)
__field(const void *, obj)
),
TP_fast_assign(
__entry->objagg = objagg;
__entry->obj = obj;
),
TP_printk("objagg %p, obj %p", __entry->objagg, __entry->obj)
);
TRACE_EVENT(objagg_obj_get,
TP_PROTO(const struct objagg *objagg,
const struct objagg_obj *obj,
unsigned int refcount),
TP_ARGS(objagg, obj, refcount),
TP_STRUCT__entry(
__field(const void *, objagg)
__field(const void *, obj)
__field(unsigned int, refcount)
),
TP_fast_assign(
__entry->objagg = objagg;
__entry->obj = obj;
__entry->refcount = refcount;
),
TP_printk("objagg %p, obj %p, refcount %u",
__entry->objagg, __entry->obj, __entry->refcount)
);
TRACE_EVENT(objagg_obj_put,
TP_PROTO(const struct objagg *objagg,
const struct objagg_obj *obj,
unsigned int refcount),
TP_ARGS(objagg, obj, refcount),
TP_STRUCT__entry(
__field(const void *, objagg)
__field(const void *, obj)
__field(unsigned int, refcount)
),
TP_fast_assign(
__entry->objagg = objagg;
__entry->obj = obj;
__entry->refcount = refcount;
),
TP_printk("objagg %p, obj %p, refcount %u",
__entry->objagg, __entry->obj, __entry->refcount)
);
TRACE_EVENT(objagg_obj_parent_assign,
TP_PROTO(const struct objagg *objagg,
const struct objagg_obj *obj,
const struct objagg_obj *parent,
unsigned int parent_refcount),
TP_ARGS(objagg, obj, parent, parent_refcount),
TP_STRUCT__entry(
__field(const void *, objagg)
__field(const void *, obj)
__field(const void *, parent)
__field(unsigned int, parent_refcount)
),
TP_fast_assign(
__entry->objagg = objagg;
__entry->obj = obj;
__entry->parent = parent;
__entry->parent_refcount = parent_refcount;
),
TP_printk("objagg %p, obj %p, parent %p, parent_refcount %u",
__entry->objagg, __entry->obj,
__entry->parent, __entry->parent_refcount)
);
TRACE_EVENT(objagg_obj_parent_unassign,
TP_PROTO(const struct objagg *objagg,
const struct objagg_obj *obj,
const struct objagg_obj *parent,
unsigned int parent_refcount),
TP_ARGS(objagg, obj, parent, parent_refcount),
TP_STRUCT__entry(
__field(const void *, objagg)
__field(const void *, obj)
__field(const void *, parent)
__field(unsigned int, parent_refcount)
),
TP_fast_assign(
__entry->objagg = objagg;
__entry->obj = obj;
__entry->parent = parent;
__entry->parent_refcount = parent_refcount;
),
TP_printk("objagg %p, obj %p, parent %p, parent_refcount %u",
__entry->objagg, __entry->obj,
__entry->parent, __entry->parent_refcount)
);
TRACE_EVENT(objagg_obj_root_create,
TP_PROTO(const struct objagg *objagg,
const struct objagg_obj *obj),
TP_ARGS(objagg, obj),
TP_STRUCT__entry(
__field(const void *, objagg)
__field(const void *, obj)
),
TP_fast_assign(
__entry->objagg = objagg;
__entry->obj = obj;
),
TP_printk("objagg %p, obj %p",
__entry->objagg, __entry->obj)
);
TRACE_EVENT(objagg_obj_root_destroy,
TP_PROTO(const struct objagg *objagg,
const struct objagg_obj *obj),
TP_ARGS(objagg, obj),
TP_STRUCT__entry(
__field(const void *, objagg)
__field(const void *, obj)
),
TP_fast_assign(
__entry->objagg = objagg;
__entry->obj = obj;
),
TP_printk("objagg %p, obj %p",
__entry->objagg, __entry->obj)
);
#endif /* __TRACE_OBJAGG_H */
/* This part must be outside protection */
#include <trace/define_trace.h>

3
lib/Kconfig
View File

@ -624,3 +624,6 @@ config GENERIC_LIB_CMPDI2
config GENERIC_LIB_UCMPDI2 config GENERIC_LIB_UCMPDI2
bool bool
config OBJAGG
tristate "objagg" if COMPILE_TEST

10
lib/Kconfig.debug
View File

@ -1976,6 +1976,16 @@ config TEST_MEMCAT_P
If unsure, say N. If unsure, say N.
config TEST_OBJAGG
tristate "Perform selftest on object aggreration manager"
default n
depends on OBJAGG
help
Enable this option to test object aggregation manager on boot
(or module load).
If unsure, say N.
endif # RUNTIME_TESTING_MENU endif # RUNTIME_TESTING_MENU
config MEMTEST config MEMTEST

2
lib/Makefile
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@ -75,6 +75,7 @@ obj-$(CONFIG_TEST_PARMAN) += test_parman.o
obj-$(CONFIG_TEST_KMOD) += test_kmod.o obj-$(CONFIG_TEST_KMOD) += test_kmod.o
obj-$(CONFIG_TEST_DEBUG_VIRTUAL) += test_debug_virtual.o obj-$(CONFIG_TEST_DEBUG_VIRTUAL) += test_debug_virtual.o
obj-$(CONFIG_TEST_MEMCAT_P) += test_memcat_p.o obj-$(CONFIG_TEST_MEMCAT_P) += test_memcat_p.o
obj-$(CONFIG_TEST_OBJAGG) += test_objagg.o
ifeq ($(CONFIG_DEBUG_KOBJECT),y) ifeq ($(CONFIG_DEBUG_KOBJECT),y)
CFLAGS_kobject.o += -DDEBUG CFLAGS_kobject.o += -DDEBUG
@ -274,3 +275,4 @@ obj-$(CONFIG_GENERIC_LIB_LSHRDI3) += lshrdi3.o
obj-$(CONFIG_GENERIC_LIB_MULDI3) += muldi3.o obj-$(CONFIG_GENERIC_LIB_MULDI3) += muldi3.o
obj-$(CONFIG_GENERIC_LIB_CMPDI2) += cmpdi2.o obj-$(CONFIG_GENERIC_LIB_CMPDI2) += cmpdi2.o
obj-$(CONFIG_GENERIC_LIB_UCMPDI2) += ucmpdi2.o obj-$(CONFIG_GENERIC_LIB_UCMPDI2) += ucmpdi2.o
obj-$(CONFIG_OBJAGG) += objagg.o

501
lib/objagg.c Normal file
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@ -0,0 +1,501 @@
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/rhashtable.h>
#include <linux/list.h>
#include <linux/sort.h>
#include <linux/objagg.h>
#define CREATE_TRACE_POINTS
#include <trace/events/objagg.h>
struct objagg {
const struct objagg_ops *ops;
void *priv;
struct rhashtable obj_ht;
struct rhashtable_params ht_params;
struct list_head obj_list;
unsigned int obj_count;
};
struct objagg_obj {
struct rhash_head ht_node; /* member of objagg->obj_ht */
struct list_head list; /* member of objagg->obj_list */
struct objagg_obj *parent; /* if the object is nested, this
* holds pointer to parent, otherwise NULL
*/
union {
void *delta_priv; /* user delta private */
void *root_priv; /* user root private */
};
unsigned int refcount; /* counts number of users of this object
* including nested objects
*/
struct objagg_obj_stats stats;
unsigned long obj[0];
};
static unsigned int objagg_obj_ref_inc(struct objagg_obj *objagg_obj)
{
return ++objagg_obj->refcount;
}
static unsigned int objagg_obj_ref_dec(struct objagg_obj *objagg_obj)
{
return --objagg_obj->refcount;
}
static void objagg_obj_stats_inc(struct objagg_obj *objagg_obj)
{
objagg_obj->stats.user_count++;
objagg_obj->stats.delta_user_count++;
if (objagg_obj->parent)
objagg_obj->parent->stats.delta_user_count++;
}
static void objagg_obj_stats_dec(struct objagg_obj *objagg_obj)
{
objagg_obj->stats.user_count--;
objagg_obj->stats.delta_user_count--;
if (objagg_obj->parent)
objagg_obj->parent->stats.delta_user_count--;
}
static bool objagg_obj_is_root(const struct objagg_obj *objagg_obj)
{
/* Nesting is not supported, so we can use ->parent
* to figure out if the object is root.
*/
return !objagg_obj->parent;
}
/**
* objagg_obj_root_priv - obtains root private for an object
* @objagg_obj: objagg object instance
*
* Note: all locking must be provided by the caller.
*
* Either the object is root itself when the private is returned
* directly, or the parent is root and its private is returned
* instead.
*
* Returns a user private root pointer.
*/
const void *objagg_obj_root_priv(const struct objagg_obj *objagg_obj)
{
if (objagg_obj_is_root(objagg_obj))
return objagg_obj->root_priv;
WARN_ON(!objagg_obj_is_root(objagg_obj->parent));
return objagg_obj->parent->root_priv;
}
EXPORT_SYMBOL(objagg_obj_root_priv);
/**
* objagg_obj_delta_priv - obtains delta private for an object
* @objagg_obj: objagg object instance
*
* Note: all locking must be provided by the caller.
*
* Returns user private delta pointer or NULL in case the passed
* object is root.
*/
const void *objagg_obj_delta_priv(const struct objagg_obj *objagg_obj)
{
if (objagg_obj_is_root(objagg_obj))
return NULL;
return objagg_obj->delta_priv;
}
EXPORT_SYMBOL(objagg_obj_delta_priv);
/**
* objagg_obj_raw - obtains object user private pointer
* @objagg_obj: objagg object instance
*
* Note: all locking must be provided by the caller.
*
* Returns user private pointer as was passed to objagg_obj_get() by "obj" arg.
*/
const void *objagg_obj_raw(const struct objagg_obj *objagg_obj)
{
return objagg_obj->obj;
}
EXPORT_SYMBOL(objagg_obj_raw);
static struct objagg_obj *objagg_obj_lookup(struct objagg *objagg, void *obj)
{
return rhashtable_lookup_fast(&objagg->obj_ht, obj, objagg->ht_params);
}
static int objagg_obj_parent_assign(struct objagg *objagg,
struct objagg_obj *objagg_obj,
struct objagg_obj *parent)
{
void *delta_priv;
delta_priv = objagg->ops->delta_create(objagg->priv, parent->obj,
objagg_obj->obj);
if (IS_ERR(delta_priv))
return PTR_ERR(delta_priv);
/* User returned a delta private, that means that
* our object can be aggregated into the parent.
*/
objagg_obj->parent = parent;
objagg_obj->delta_priv = delta_priv;
objagg_obj_ref_inc(objagg_obj->parent);
trace_objagg_obj_parent_assign(objagg, objagg_obj,
parent,
parent->refcount);
return 0;
}
static int objagg_obj_parent_lookup_assign(struct objagg *objagg,
struct objagg_obj *objagg_obj)
{
struct objagg_obj *objagg_obj_cur;
int err;
list_for_each_entry(objagg_obj_cur, &objagg->obj_list, list) {
/* Nesting is not supported. In case the object
* is not root, it cannot be assigned as parent.
*/
if (!objagg_obj_is_root(objagg_obj_cur))
continue;
err = objagg_obj_parent_assign(objagg, objagg_obj,
objagg_obj_cur);
if (!err)
return 0;
}
return -ENOENT;
}
static void __objagg_obj_put(struct objagg *objagg,
struct objagg_obj *objagg_obj);
static void objagg_obj_parent_unassign(struct objagg *objagg,
struct objagg_obj *objagg_obj)
{
trace_objagg_obj_parent_unassign(objagg, objagg_obj,
objagg_obj->parent,
objagg_obj->parent->refcount);
objagg->ops->delta_destroy(objagg->priv, objagg_obj->delta_priv);
__objagg_obj_put(objagg, objagg_obj->parent);
}
static int objagg_obj_root_create(struct objagg *objagg,
struct objagg_obj *objagg_obj)
{
objagg_obj->root_priv = objagg->ops->root_create(objagg->priv,
objagg_obj->obj);
if (IS_ERR(objagg_obj->root_priv))
return PTR_ERR(objagg_obj->root_priv);
trace_objagg_obj_root_create(objagg, objagg_obj);
return 0;
}
static void objagg_obj_root_destroy(struct objagg *objagg,
struct objagg_obj *objagg_obj)
{
trace_objagg_obj_root_destroy(objagg, objagg_obj);
objagg->ops->root_destroy(objagg->priv, objagg_obj->root_priv);
}
static int objagg_obj_init(struct objagg *objagg,
struct objagg_obj *objagg_obj)
{
int err;
/* Try to find if the object can be aggregated under an existing one. */
err = objagg_obj_parent_lookup_assign(objagg, objagg_obj);
if (!err)
return 0;
/* If aggregation is not possible, make the object a root. */
return objagg_obj_root_create(objagg, objagg_obj);
}
static void objagg_obj_fini(struct objagg *objagg,
struct objagg_obj *objagg_obj)
{
if (!objagg_obj_is_root(objagg_obj))
objagg_obj_parent_unassign(objagg, objagg_obj);
else
objagg_obj_root_destroy(objagg, objagg_obj);
}
static struct objagg_obj *objagg_obj_create(struct objagg *objagg, void *obj)
{
struct objagg_obj *objagg_obj;
int err;
objagg_obj = kzalloc(sizeof(*objagg_obj) + objagg->ops->obj_size,
GFP_KERNEL);
if (!objagg_obj)
return ERR_PTR(-ENOMEM);
objagg_obj_ref_inc(objagg_obj);
memcpy(objagg_obj->obj, obj, objagg->ops->obj_size);
err = objagg_obj_init(objagg, objagg_obj);
if (err)
goto err_obj_init;
err = rhashtable_insert_fast(&objagg->obj_ht, &objagg_obj->ht_node,
objagg->ht_params);
if (err)
goto err_ht_insert;
list_add(&objagg_obj->list, &objagg->obj_list);
objagg->obj_count++;
trace_objagg_obj_create(objagg, objagg_obj);
return objagg_obj;
err_ht_insert:
objagg_obj_fini(objagg, objagg_obj);
err_obj_init:
kfree(objagg_obj);
return ERR_PTR(err);
}
static struct objagg_obj *__objagg_obj_get(struct objagg *objagg, void *obj)
{
struct objagg_obj *objagg_obj;
/* First, try to find the object exactly as user passed it,
* perhaps it is already in use.
*/
objagg_obj = objagg_obj_lookup(objagg, obj);
if (objagg_obj) {
objagg_obj_ref_inc(objagg_obj);
return objagg_obj;
}
return objagg_obj_create(objagg, obj);
}
/**
* objagg_obj_get - gets an object within objagg instance
* @objagg: objagg instance
* @obj: user-specific private object pointer
*
* Note: all locking must be provided by the caller.
*
* Size of the "obj" memory is specified in "objagg->ops".
*
* There are 3 main options this function wraps:
* 1) The object according to "obj" already exist. In that case
* the reference counter is incrementes and the object is returned.
* 2) The object does not exist, but it can be aggregated within
* another object. In that case, user ops->delta_create() is called
* to obtain delta data and a new object is created with returned
* user-delta private pointer.
* 3) The object does not exist and cannot be aggregated into
* any of the existing objects. In that case, user ops->root_create()
* is called to create the root and a new object is created with
* returned user-root private pointer.
*
* Returns a pointer to objagg object instance in case of success,
* otherwise it returns pointer error using ERR_PTR macro.
*/
struct objagg_obj *objagg_obj_get(struct objagg *objagg, void *obj)
{
struct objagg_obj *objagg_obj;
objagg_obj = __objagg_obj_get(objagg, obj);
if (IS_ERR(objagg_obj))
return objagg_obj;
objagg_obj_stats_inc(objagg_obj);
trace_objagg_obj_get(objagg, objagg_obj, objagg_obj->refcount);
return objagg_obj;
}
EXPORT_SYMBOL(objagg_obj_get);
static void objagg_obj_destroy(struct objagg *objagg,
struct objagg_obj *objagg_obj)
{
trace_objagg_obj_destroy(objagg, objagg_obj);
--objagg->obj_count;
list_del(&objagg_obj->list);
rhashtable_remove_fast(&objagg->obj_ht, &objagg_obj->ht_node,
objagg->ht_params);
objagg_obj_fini(objagg, objagg_obj);
kfree(objagg_obj);
}
static void __objagg_obj_put(struct objagg *objagg,
struct objagg_obj *objagg_obj)
{
if (!objagg_obj_ref_dec(objagg_obj))
objagg_obj_destroy(objagg, objagg_obj);
}
/**
* objagg_obj_put - puts an object within objagg instance
* @objagg: objagg instance
* @objagg_obj: objagg object instance
*
* Note: all locking must be provided by the caller.
*
* Symmetric to objagg_obj_get().
*/
void objagg_obj_put(struct objagg *objagg, struct objagg_obj *objagg_obj)
{
trace_objagg_obj_put(objagg, objagg_obj, objagg_obj->refcount);
objagg_obj_stats_dec(objagg_obj);
__objagg_obj_put(objagg, objagg_obj);
}
EXPORT_SYMBOL(objagg_obj_put);
/**
* objagg_create - creates a new objagg instance
* @ops: user-specific callbacks
* @priv: pointer to a private data passed to the ops
*
* Note: all locking must be provided by the caller.
*
* The purpose of the library is to provide an infrastructure to
* aggregate user-specified objects. Library does not care about the type
* of the object. User fills-up ops which take care of the specific
* user object manipulation.
*
* As a very stupid example, consider integer numbers. For example
* number 8 as a root object. That can aggregate number 9 with delta 1,
* number 10 with delta 2, etc. This example is implemented as
* a part of a testing module in test_objagg.c file.
*
* Each objagg instance contains multiple trees. Each tree node is
* represented by "an object". In the current implementation there can be
* only roots and leafs nodes. Leaf nodes are called deltas.
* But in general, this can be easily extended for intermediate nodes.
* In that extension, a delta would be associated with all non-root
* nodes.
*
* Returns a pointer to newly created objagg instance in case of success,
* otherwise it returns pointer error using ERR_PTR macro.
*/
struct objagg *objagg_create(const struct objagg_ops *ops, void *priv)
{
struct objagg *objagg;
int err;
if (WARN_ON(!ops || !ops->root_create || !ops->root_destroy ||
!ops->delta_create || !ops->delta_destroy))
return ERR_PTR(-EINVAL);
objagg = kzalloc(sizeof(*objagg), GFP_KERNEL);
if (!objagg)
return ERR_PTR(-ENOMEM);
objagg->ops = ops;
objagg->priv = priv;
INIT_LIST_HEAD(&objagg->obj_list);
objagg->ht_params.key_len = ops->obj_size;
objagg->ht_params.key_offset = offsetof(struct objagg_obj, obj);
objagg->ht_params.head_offset = offsetof(struct objagg_obj, ht_node);
err = rhashtable_init(&objagg->obj_ht, &objagg->ht_params);
if (err)
goto err_rhashtable_init;
trace_objagg_create(objagg);
return objagg;
err_rhashtable_init:
kfree(objagg);
return ERR_PTR(err);
}
EXPORT_SYMBOL(objagg_create);
/**
* objagg_destroy - destroys a new objagg instance
* @objagg: objagg instance
*
* Note: all locking must be provided by the caller.
*/
void objagg_destroy(struct objagg *objagg)
{
trace_objagg_destroy(objagg);
WARN_ON(!list_empty(&objagg->obj_list));
rhashtable_destroy(&objagg->obj_ht);
kfree(objagg);
}
EXPORT_SYMBOL(objagg_destroy);
static int objagg_stats_info_sort_cmp_func(const void *a, const void *b)
{
const struct objagg_obj_stats_info *stats_info1 = a;
const struct objagg_obj_stats_info *stats_info2 = b;
if (stats_info1->is_root != stats_info2->is_root)
return stats_info2->is_root - stats_info1->is_root;
if (stats_info1->stats.delta_user_count !=
stats_info2->stats.delta_user_count)
return stats_info2->stats.delta_user_count -
stats_info1->stats.delta_user_count;
return stats_info2->stats.user_count - stats_info1->stats.user_count;
}
/**
* objagg_stats_get - obtains stats of the objagg instance
* @objagg: objagg instance
*
* Note: all locking must be provided by the caller.
*
* The returned structure contains statistics of all object
* currently in use, ordered by following rules:
* 1) Root objects are always on lower indexes than the rest.
* 2) Objects with higher delta user count are always on lower
* indexes.
* 3) In case more objects have the same delta user count,
* the objects are ordered by user count.
*
* Returns a pointer to stats instance in case of success,
* otherwise it returns pointer error using ERR_PTR macro.
*/
const struct objagg_stats *objagg_stats_get(struct objagg *objagg)
{
struct objagg_stats *objagg_stats;
struct objagg_obj *objagg_obj;
size_t alloc_size;
int i;
alloc_size = sizeof(*objagg_stats) +
sizeof(objagg_stats->stats_info[0]) * objagg->obj_count;
objagg_stats = kzalloc(alloc_size, GFP_KERNEL);
if (!objagg_stats)
return ERR_PTR(-ENOMEM);
i = 0;
list_for_each_entry(objagg_obj, &objagg->obj_list, list) {
memcpy(&objagg_stats->stats_info[i].stats, &objagg_obj->stats,
sizeof(objagg_stats->stats_info[0].stats));
objagg_stats->stats_info[i].objagg_obj = objagg_obj;
objagg_stats->stats_info[i].is_root =
objagg_obj_is_root(objagg_obj);
i++;
}
objagg_stats->stats_info_count = i;
sort(objagg_stats->stats_info, objagg_stats->stats_info_count,
sizeof(struct objagg_obj_stats_info),
objagg_stats_info_sort_cmp_func, NULL);
return objagg_stats;
}
EXPORT_SYMBOL(objagg_stats_get);
/**
* objagg_stats_puts - puts stats of the objagg instance
* @objagg_stats: objagg instance stats
*
* Note: all locking must be provided by the caller.
*/
void objagg_stats_put(const struct objagg_stats *objagg_stats)
{
kfree(objagg_stats);
}
EXPORT_SYMBOL(objagg_stats_put);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
MODULE_DESCRIPTION("Object aggregation manager");

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lib/test_objagg.c Normal file
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@ -0,0 +1,835 @@
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/objagg.h>
struct tokey {
unsigned int id;
};
#define NUM_KEYS 32
static int key_id_index(unsigned int key_id)
{
if (key_id >= NUM_KEYS) {
WARN_ON(1);
return 0;
}
return key_id;
}
#define BUF_LEN 128
struct world {
unsigned int root_count;
unsigned int delta_count;
char next_root_buf[BUF_LEN];
struct objagg_obj *objagg_objs[NUM_KEYS];
unsigned int key_refs[NUM_KEYS];
};
struct root {
struct tokey key;
char buf[BUF_LEN];
};
struct delta {
unsigned int key_id_diff;
};
static struct objagg_obj *world_obj_get(struct world *world,
struct objagg *objagg,
unsigned int key_id)
{
struct objagg_obj *objagg_obj;
struct tokey key;
int err;
key.id = key_id;
objagg_obj = objagg_obj_get(objagg, &key);
if (IS_ERR(objagg_obj)) {
pr_err("Key %u: Failed to get object.\n", key_id);
return objagg_obj;
}
if (!world->key_refs[key_id_index(key_id)]) {
world->objagg_objs[key_id_index(key_id)] = objagg_obj;
} else if (world->objagg_objs[key_id_index(key_id)] != objagg_obj) {
pr_err("Key %u: God another object for the same key.\n",
key_id);
err = -EINVAL;
goto err_key_id_check;
}
world->key_refs[key_id_index(key_id)]++;
return objagg_obj;
err_key_id_check:
objagg_obj_put(objagg, objagg_obj);
return ERR_PTR(err);
}
static void world_obj_put(struct world *world, struct objagg *objagg,
unsigned int key_id)
{
struct objagg_obj *objagg_obj;
if (!world->key_refs[key_id_index(key_id)])
return;
objagg_obj = world->objagg_objs[key_id_index(key_id)];
objagg_obj_put(objagg, objagg_obj);
world->key_refs[key_id_index(key_id)]--;
}
#define MAX_KEY_ID_DIFF 5
static void *delta_create(void *priv, void *parent_obj, void *obj)
{
struct tokey *parent_key = parent_obj;
struct world *world = priv;
struct tokey *key = obj;
int diff = key->id - parent_key->id;
struct delta *delta;
if (diff < 0 || diff > MAX_KEY_ID_DIFF)
return ERR_PTR(-EINVAL);
delta = kzalloc(sizeof(*delta), GFP_KERNEL);
if (!delta)
return ERR_PTR(-ENOMEM);
delta->key_id_diff = diff;
world->delta_count++;
return delta;
}
static void delta_destroy(void *priv, void *delta_priv)
{
struct delta *delta = delta_priv;
struct world *world = priv;
world->delta_count--;
kfree(delta);
}
static void *root_create(void *priv, void *obj)
{
struct world *world = priv;
struct tokey *key = obj;
struct root *root;
root = kzalloc(sizeof(*root), GFP_KERNEL);
if (!root)
return ERR_PTR(-ENOMEM);
memcpy(&root->key, key, sizeof(root->key));
memcpy(root->buf, world->next_root_buf, sizeof(root->buf));
world->root_count++;
return root;
}
static void root_destroy(void *priv, void *root_priv)
{
struct root *root = root_priv;
struct world *world = priv;
world->root_count--;
kfree(root);
}
static int test_nodelta_obj_get(struct world *world, struct objagg *objagg,
unsigned int key_id, bool should_create_root)
{
unsigned int orig_root_count = world->root_count;
struct objagg_obj *objagg_obj;
const struct root *root;
int err;
if (should_create_root)
prandom_bytes(world->next_root_buf,
sizeof(world->next_root_buf));
objagg_obj = world_obj_get(world, objagg, key_id);
if (IS_ERR(objagg_obj)) {
pr_err("Key %u: Failed to get object.\n", key_id);
return PTR_ERR(objagg_obj);
}
if (should_create_root) {
if (world->root_count != orig_root_count + 1) {
pr_err("Key %u: Root was not created\n", key_id);
err = -EINVAL;
goto err_check_root_count;
}
} else {
if (world->root_count != orig_root_count) {
pr_err("Key %u: Root was incorrectly created\n",
key_id);
err = -EINVAL;
goto err_check_root_count;
}
}
root = objagg_obj_root_priv(objagg_obj);
if (root->key.id != key_id) {
pr_err("Key %u: Root has unexpected key id\n", key_id);
err = -EINVAL;
goto err_check_key_id;
}
if (should_create_root &&
memcmp(world->next_root_buf, root->buf, sizeof(root->buf))) {
pr_err("Key %u: Buffer does not match the expected content\n",
key_id);
err = -EINVAL;
goto err_check_buf;
}
return 0;
err_check_buf:
err_check_key_id:
err_check_root_count:
objagg_obj_put(objagg, objagg_obj);
return err;
}
static int test_nodelta_obj_put(struct world *world, struct objagg *objagg,
unsigned int key_id, bool should_destroy_root)
{
unsigned int orig_root_count = world->root_count;
world_obj_put(world, objagg, key_id);
if (should_destroy_root) {
if (world->root_count != orig_root_count - 1) {
pr_err("Key %u: Root was not destroyed\n", key_id);
return -EINVAL;
}
} else {
if (world->root_count != orig_root_count) {
pr_err("Key %u: Root was incorrectly destroyed\n",
key_id);
return -EINVAL;
}
}
return 0;
}
static int check_stats_zero(struct objagg *objagg)
{
const struct objagg_stats *stats;
int err = 0;
stats = objagg_stats_get(objagg);
if (IS_ERR(stats))
return PTR_ERR(stats);
if (stats->stats_info_count != 0) {
pr_err("Stats: Object count is not zero while it should be\n");
err = -EINVAL;
}
objagg_stats_put(stats);
return err;
}
static int check_stats_nodelta(struct objagg *objagg)
{
const struct objagg_stats *stats;
int i;
int err;
stats = objagg_stats_get(objagg);
if (IS_ERR(stats))
return PTR_ERR(stats);
if (stats->stats_info_count != NUM_KEYS) {
pr_err("Stats: Unexpected object count (%u expected, %u returned)\n",
NUM_KEYS, stats->stats_info_count);
err = -EINVAL;
goto stats_put;
}
for (i = 0; i < stats->stats_info_count; i++) {
if (stats->stats_info[i].stats.user_count != 2) {
pr_err("Stats: incorrect user count\n");
err = -EINVAL;
goto stats_put;
}
if (stats->stats_info[i].stats.delta_user_count != 2) {
pr_err("Stats: incorrect delta user count\n");
err = -EINVAL;
goto stats_put;
}
}
err = 0;
stats_put:
objagg_stats_put(stats);
return err;
}
static void *delta_create_dummy(void *priv, void *parent_obj, void *obj)
{
return ERR_PTR(-EOPNOTSUPP);
}
static void delta_destroy_dummy(void *priv, void *delta_priv)
{
}
static const struct objagg_ops nodelta_ops = {
.obj_size = sizeof(struct tokey),
.delta_create = delta_create_dummy,
.delta_destroy = delta_destroy_dummy,
.root_create = root_create,
.root_destroy = root_destroy,
};
static int test_nodelta(void)
{
struct world world = {};
struct objagg *objagg;
int i;
int err;
objagg = objagg_create(&nodelta_ops, &world);
if (IS_ERR(objagg))
return PTR_ERR(objagg);
err = check_stats_zero(objagg);
if (err)
goto err_stats_first_zero;
/* First round of gets, the root objects should be created */
for (i = 0; i < NUM_KEYS; i++) {
err = test_nodelta_obj_get(&world, objagg, i, true);
if (err)
goto err_obj_first_get;
}
/* Do the second round of gets, all roots are already created,
* make sure that no new root is created
*/
for (i = 0; i < NUM_KEYS; i++) {
err = test_nodelta_obj_get(&world, objagg, i, false);
if (err)
goto err_obj_second_get;
}
err = check_stats_nodelta(objagg);
if (err)
goto err_stats_nodelta;
for (i = NUM_KEYS - 1; i >= 0; i--) {
err = test_nodelta_obj_put(&world, objagg, i, false);
if (err)
goto err_obj_first_put;
}
for (i = NUM_KEYS - 1; i >= 0; i--) {
err = test_nodelta_obj_put(&world, objagg, i, true);
if (err)
goto err_obj_second_put;
}
err = check_stats_zero(objagg);
if (err)
goto err_stats_second_zero;
objagg_destroy(objagg);
return 0;
err_stats_nodelta:
err_obj_first_put:
err_obj_second_get:
for (i--; i >= 0; i--)
world_obj_put(&world, objagg, i);
i = NUM_KEYS;
err_obj_first_get:
err_obj_second_put:
for (i--; i >= 0; i--)
world_obj_put(&world, objagg, i);
err_stats_first_zero:
err_stats_second_zero:
objagg_destroy(objagg);
return err;
}
static const struct objagg_ops delta_ops = {
.obj_size = sizeof(struct tokey),
.delta_create = delta_create,
.delta_destroy = delta_destroy,
.root_create = root_create,
.root_destroy = root_destroy,
};
enum action {
ACTION_GET,
ACTION_PUT,
};
enum expect_delta {
EXPECT_DELTA_SAME,
EXPECT_DELTA_INC,
EXPECT_DELTA_DEC,
};
enum expect_root {
EXPECT_ROOT_SAME,
EXPECT_ROOT_INC,
EXPECT_ROOT_DEC,
};
struct expect_stats_info {
struct objagg_obj_stats stats;
bool is_root;
unsigned int key_id;
};
struct expect_stats {
unsigned int info_count;
struct expect_stats_info info[NUM_KEYS];
};
struct action_item {
unsigned int key_id;
enum action action;
enum expect_delta expect_delta;
enum expect_root expect_root;
struct expect_stats expect_stats;
};
#define EXPECT_STATS(count, ...) \
{ \
.info_count = count, \
.info = { __VA_ARGS__ } \
}
#define ROOT(key_id, user_count, delta_user_count) \
{{user_count, delta_user_count}, true, key_id}
#define DELTA(key_id, user_count) \
{{user_count, user_count}, false, key_id}
static const struct action_item action_items[] = {
{
1, ACTION_GET, EXPECT_DELTA_SAME, EXPECT_ROOT_INC,
EXPECT_STATS(1, ROOT(1, 1, 1)),
}, /* r: 1 d: */
{
7, ACTION_GET, EXPECT_DELTA_SAME, EXPECT_ROOT_INC,
EXPECT_STATS(2, ROOT(1, 1, 1), ROOT(7, 1, 1)),
}, /* r: 1, 7 d: */
{
3, ACTION_GET, EXPECT_DELTA_INC, EXPECT_ROOT_SAME,
EXPECT_STATS(3, ROOT(1, 1, 2), ROOT(7, 1, 1),
DELTA(3, 1)),
}, /* r: 1, 7 d: 3^1 */
{
5, ACTION_GET, EXPECT_DELTA_INC, EXPECT_ROOT_SAME,
EXPECT_STATS(4, ROOT(1, 1, 3), ROOT(7, 1, 1),
DELTA(3, 1), DELTA(5, 1)),
}, /* r: 1, 7 d: 3^1, 5^1 */
{
3, ACTION_GET, EXPECT_DELTA_SAME, EXPECT_ROOT_SAME,
EXPECT_STATS(4, ROOT(1, 1, 4), ROOT(7, 1, 1),
DELTA(3, 2), DELTA(5, 1)),
}, /* r: 1, 7 d: 3^1, 3^1, 5^1 */
{
1, ACTION_GET, EXPECT_DELTA_SAME, EXPECT_ROOT_SAME,
EXPECT_STATS(4, ROOT(1, 2, 5), ROOT(7, 1, 1),
DELTA(3, 2), DELTA(5, 1)),
}, /* r: 1, 1, 7 d: 3^1, 3^1, 5^1 */
{
30, ACTION_GET, EXPECT_DELTA_SAME, EXPECT_ROOT_INC,
EXPECT_STATS(5, ROOT(1, 2, 5), ROOT(7, 1, 1), ROOT(30, 1, 1),
DELTA(3, 2), DELTA(5, 1)),
}, /* r: 1, 1, 7, 30 d: 3^1, 3^1, 5^1 */
{
8, ACTION_GET, EXPECT_DELTA_INC, EXPECT_ROOT_SAME,
EXPECT_STATS(6, ROOT(1, 2, 5), ROOT(7, 1, 2), ROOT(30, 1, 1),
DELTA(3, 2), DELTA(5, 1), DELTA(8, 1)),
}, /* r: 1, 1, 7, 30 d: 3^1, 3^1, 5^1, 8^7 */
{
8, ACTION_GET, EXPECT_DELTA_SAME, EXPECT_ROOT_SAME,
EXPECT_STATS(6, ROOT(1, 2, 5), ROOT(7, 1, 3), ROOT(30, 1, 1),
DELTA(3, 2), DELTA(8, 2), DELTA(5, 1)),
}, /* r: 1, 1, 7, 30 d: 3^1, 3^1, 5^1, 8^7, 8^7 */
{
3, ACTION_PUT, EXPECT_DELTA_SAME, EXPECT_ROOT_SAME,
EXPECT_STATS(6, ROOT(1, 2, 4), ROOT(7, 1, 3), ROOT(30, 1, 1),
DELTA(8, 2), DELTA(3, 1), DELTA(5, 1)),
}, /* r: 1, 1, 7, 30 d: 3^1, 5^1, 8^7, 8^7 */
{
3, ACTION_PUT, EXPECT_DELTA_DEC, EXPECT_ROOT_SAME,
EXPECT_STATS(5, ROOT(1, 2, 3), ROOT(7, 1, 3), ROOT(30, 1, 1),
DELTA(8, 2), DELTA(5, 1)),
}, /* r: 1, 1, 7, 30 d: 5^1, 8^7, 8^7 */
{
1, ACTION_PUT, EXPECT_DELTA_SAME, EXPECT_ROOT_SAME,
EXPECT_STATS(5, ROOT(7, 1, 3), ROOT(1, 1, 2), ROOT(30, 1, 1),
DELTA(8, 2), DELTA(5, 1)),
}, /* r: 1, 7, 30 d: 5^1, 8^7, 8^7 */
{
1, ACTION_PUT, EXPECT_DELTA_SAME, EXPECT_ROOT_SAME,
EXPECT_STATS(5, ROOT(7, 1, 3), ROOT(30, 1, 1), ROOT(1, 0, 1),
DELTA(8, 2), DELTA(5, 1)),
}, /* r: 7, 30 d: 5^1, 8^7, 8^7 */
{
5, ACTION_PUT, EXPECT_DELTA_DEC, EXPECT_ROOT_DEC,
EXPECT_STATS(3, ROOT(7, 1, 3), ROOT(30, 1, 1),
DELTA(8, 2)),
}, /* r: 7, 30 d: 8^7, 8^7 */
{
5, ACTION_GET, EXPECT_DELTA_SAME, EXPECT_ROOT_INC,
EXPECT_STATS(4, ROOT(7, 1, 3), ROOT(30, 1, 1), ROOT(5, 1, 1),
DELTA(8, 2)),
}, /* r: 7, 30, 5 d: 8^7, 8^7 */
{
6, ACTION_GET, EXPECT_DELTA_INC, EXPECT_ROOT_SAME,
EXPECT_STATS(5, ROOT(7, 1, 3), ROOT(5, 1, 2), ROOT(30, 1, 1),
DELTA(8, 2), DELTA(6, 1)),
}, /* r: 7, 30, 5 d: 8^7, 8^7, 6^5 */
{
8, ACTION_GET, EXPECT_DELTA_SAME, EXPECT_ROOT_SAME,
EXPECT_STATS(5, ROOT(7, 1, 4), ROOT(5, 1, 2), ROOT(30, 1, 1),
DELTA(8, 3), DELTA(6, 1)),
}, /* r: 7, 30, 5 d: 8^7, 8^7, 8^7, 6^5 */
{
8, ACTION_PUT, EXPECT_DELTA_SAME, EXPECT_ROOT_SAME,
EXPECT_STATS(5, ROOT(7, 1, 3), ROOT(5, 1, 2), ROOT(30, 1, 1),
DELTA(8, 2), DELTA(6, 1)),
}, /* r: 7, 30, 5 d: 8^7, 8^7, 6^5 */
{
8, ACTION_PUT, EXPECT_DELTA_SAME, EXPECT_ROOT_SAME,
EXPECT_STATS(5, ROOT(7, 1, 2), ROOT(5, 1, 2), ROOT(30, 1, 1),
DELTA(8, 1), DELTA(6, 1)),
}, /* r: 7, 30, 5 d: 8^7, 6^5 */
{
8, ACTION_PUT, EXPECT_DELTA_DEC, EXPECT_ROOT_SAME,
EXPECT_STATS(4, ROOT(5, 1, 2), ROOT(7, 1, 1), ROOT(30, 1, 1),
DELTA(6, 1)),
}, /* r: 7, 30, 5 d: 6^5 */
{
8, ACTION_GET, EXPECT_DELTA_INC, EXPECT_ROOT_SAME,
EXPECT_STATS(5, ROOT(5, 1, 3), ROOT(7, 1, 1), ROOT(30, 1, 1),
DELTA(6, 1), DELTA(8, 1)),
}, /* r: 7, 30, 5 d: 6^5, 8^5 */
{
7, ACTION_PUT, EXPECT_DELTA_SAME, EXPECT_ROOT_DEC,
EXPECT_STATS(4, ROOT(5, 1, 3), ROOT(30, 1, 1),
DELTA(6, 1), DELTA(8, 1)),
}, /* r: 30, 5 d: 6^5, 8^5 */
{
30, ACTION_PUT, EXPECT_DELTA_SAME, EXPECT_ROOT_DEC,
EXPECT_STATS(3, ROOT(5, 1, 3),
DELTA(6, 1), DELTA(8, 1)),
}, /* r: 5 d: 6^5, 8^5 */
{
5, ACTION_PUT, EXPECT_DELTA_SAME, EXPECT_ROOT_SAME,
EXPECT_STATS(3, ROOT(5, 0, 2),
DELTA(6, 1), DELTA(8, 1)),
}, /* r: d: 6^5, 8^5 */
{
6, ACTION_PUT, EXPECT_DELTA_DEC, EXPECT_ROOT_SAME,
EXPECT_STATS(2, ROOT(5, 0, 1),
DELTA(8, 1)),
}, /* r: d: 6^5 */
{
8, ACTION_PUT, EXPECT_DELTA_DEC, EXPECT_ROOT_DEC,
EXPECT_STATS(0, ),
}, /* r: d: */
};
static int check_expect(struct world *world,
const struct action_item *action_item,
unsigned int orig_delta_count,
unsigned int orig_root_count)
{
unsigned int key_id = action_item->key_id;
switch (action_item->expect_delta) {
case EXPECT_DELTA_SAME:
if (orig_delta_count != world->delta_count) {
pr_err("Key %u: Delta count changed while expected to remain the same.\n",
key_id);
return -EINVAL;
}
break;
case EXPECT_DELTA_INC:
if (WARN_ON(action_item->action == ACTION_PUT))
return -EINVAL;
if (orig_delta_count + 1 != world->delta_count) {
pr_err("Key %u: Delta count was not incremented.\n",
key_id);
return -EINVAL;
}
break;
case EXPECT_DELTA_DEC:
if (WARN_ON(action_item->action == ACTION_GET))
return -EINVAL;
if (orig_delta_count - 1 != world->delta_count) {
pr_err("Key %u: Delta count was not decremented.\n",
key_id);
return -EINVAL;
}
break;
}
switch (action_item->expect_root) {
case EXPECT_ROOT_SAME:
if (orig_root_count != world->root_count) {
pr_err("Key %u: Root count changed while expected to remain the same.\n",
key_id);
return -EINVAL;
}
break;
case EXPECT_ROOT_INC:
if (WARN_ON(action_item->action == ACTION_PUT))
return -EINVAL;
if (orig_root_count + 1 != world->root_count) {
pr_err("Key %u: Root count was not incremented.\n",
key_id);
return -EINVAL;
}
break;
case EXPECT_ROOT_DEC:
if (WARN_ON(action_item->action == ACTION_GET))
return -EINVAL;
if (orig_root_count - 1 != world->root_count) {
pr_err("Key %u: Root count was not decremented.\n",
key_id);
return -EINVAL;
}
}
return 0;
}
static unsigned int obj_to_key_id(struct objagg_obj *objagg_obj)
{
const struct tokey *root_key;
const struct delta *delta;
unsigned int key_id;
root_key = objagg_obj_root_priv(objagg_obj);
key_id = root_key->id;
delta = objagg_obj_delta_priv(objagg_obj);
if (delta)
key_id += delta->key_id_diff;
return key_id;
}
static int
check_expect_stats_nums(const struct objagg_obj_stats_info *stats_info,
const struct expect_stats_info *expect_stats_info,
const char **errmsg)
{
if (stats_info->is_root != expect_stats_info->is_root) {
if (errmsg)
*errmsg = "Incorrect root/delta indication";
return -EINVAL;
}
if (stats_info->stats.user_count !=
expect_stats_info->stats.user_count) {
if (errmsg)
*errmsg = "Incorrect user count";
return -EINVAL;
}
if (stats_info->stats.delta_user_count !=
expect_stats_info->stats.delta_user_count) {
if (errmsg)
*errmsg = "Incorrect delta user count";
return -EINVAL;
}
return 0;
}
static int
check_expect_stats_key_id(const struct objagg_obj_stats_info *stats_info,
const struct expect_stats_info *expect_stats_info,
const char **errmsg)
{
if (obj_to_key_id(stats_info->objagg_obj) !=
expect_stats_info->key_id) {
if (errmsg)
*errmsg = "incorrect key id";
return -EINVAL;
}
return 0;
}
static int check_expect_stats_neigh(const struct objagg_stats *stats,
const struct expect_stats *expect_stats,
int pos)
{
int i;
int err;
for (i = pos - 1; i >= 0; i--) {
err = check_expect_stats_nums(&stats->stats_info[i],
&expect_stats->info[pos], NULL);
if (err)
break;
err = check_expect_stats_key_id(&stats->stats_info[i],
&expect_stats->info[pos], NULL);
if (!err)
return 0;
}
for (i = pos + 1; i < stats->stats_info_count; i++) {
err = check_expect_stats_nums(&stats->stats_info[i],
&expect_stats->info[pos], NULL);
if (err)
break;
err = check_expect_stats_key_id(&stats->stats_info[i],
&expect_stats->info[pos], NULL);
if (!err)
return 0;
}
return -EINVAL;
}
static int __check_expect_stats(const struct objagg_stats *stats,
const struct expect_stats *expect_stats,
const char **errmsg)
{
int i;
int err;
if (stats->stats_info_count != expect_stats->info_count) {
*errmsg = "Unexpected object count";
return -EINVAL;
}
for (i = 0; i < stats->stats_info_count; i++) {
err = check_expect_stats_nums(&stats->stats_info[i],
&expect_stats->info[i], errmsg);
if (err)
return err;
err = check_expect_stats_key_id(&stats->stats_info[i],
&expect_stats->info[i], errmsg);
if (err) {
/* It is possible that one of the neighbor stats with
* same numbers have the correct key id, so check it
*/
err = check_expect_stats_neigh(stats, expect_stats, i);
if (err)
return err;
}
}
return 0;
}
static int check_expect_stats(struct objagg *objagg,
const struct expect_stats *expect_stats,
const char **errmsg)
{
const struct objagg_stats *stats;
int err;
stats = objagg_stats_get(objagg);
if (IS_ERR(stats))
return PTR_ERR(stats);
err = __check_expect_stats(stats, expect_stats, errmsg);
objagg_stats_put(stats);
return err;
}
static int test_delta_action_item(struct world *world,
struct objagg *objagg,
const struct action_item *action_item,
bool inverse)
{
unsigned int orig_delta_count = world->delta_count;
unsigned int orig_root_count = world->root_count;
unsigned int key_id = action_item->key_id;
enum action action = action_item->action;
struct objagg_obj *objagg_obj;
const char *errmsg;
int err;
if (inverse)
action = action == ACTION_GET ? ACTION_PUT : ACTION_GET;
switch (action) {
case ACTION_GET:
objagg_obj = world_obj_get(world, objagg, key_id);
if (IS_ERR(objagg_obj))
return PTR_ERR(objagg_obj);
break;
case ACTION_PUT:
world_obj_put(world, objagg, key_id);
break;
}
if (inverse)
return 0;
err = check_expect(world, action_item,
orig_delta_count, orig_root_count);
if (err)
goto errout;
err = check_expect_stats(objagg, &action_item->expect_stats, &errmsg);
if (err) {
pr_err("Key %u: Stats: %s\n", action_item->key_id, errmsg);
goto errout;
}
return 0;
errout:
/* This can only happen when action is not inversed.
* So in case of an error, cleanup by doing inverse action.
*/
test_delta_action_item(world, objagg, action_item, true);
return err;
}
static int test_delta(void)
{
struct world world = {};
struct objagg *objagg;
int i;
int err;
objagg = objagg_create(&delta_ops, &world);
if (IS_ERR(objagg))
return PTR_ERR(objagg);
for (i = 0; i < ARRAY_SIZE(action_items); i++) {
err = test_delta_action_item(&world, objagg,
&action_items[i], false);
if (err)
goto err_do_action_item;
}
objagg_destroy(objagg);
return 0;
err_do_action_item:
for (i--; i >= 0; i--)
test_delta_action_item(&world, objagg, &action_items[i], true);
objagg_destroy(objagg);
return err;
}
static int __init test_objagg_init(void)
{
int err;
err = test_nodelta();
if (err)
return err;
return test_delta();
}
static void __exit test_objagg_exit(void)
{
}
module_init(test_objagg_init);
module_exit(test_objagg_exit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
MODULE_DESCRIPTION("Test module for objagg");