[dpdk-dev] [PATCH v2 1/7] rawdev: add private data length parameter to info fn
Bruce Richardson
bruce.richardson at intel.com
Thu Aug 13 13:27:59 CEST 2020
Currently with the rawdev API there is no way to check that the structure
passed in via the dev_private pointer in the dev_info structure is of the
correct type - it's just checked that it is non-NULL. Adding in the length
of the expected structure provides a measure of typechecking, and can also
be used for ABI compatibility in future, since ABI changes involving
structs almost always involve a change in size.
Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
Reviewed-by: Rosen Xu <rosen.xu at intel.com>
---
app/test/test_rawdev.c | 2 +-
doc/guides/rawdevs/ioat.rst | 2 +-
doc/guides/sample_app_ug/ioat.rst | 2 +-
drivers/bus/ifpga/ifpga_bus.c | 2 +-
drivers/raw/ifpga/ifpga_rawdev.c | 5 +++--
drivers/raw/ioat/ioat_rawdev.c | 5 +++--
drivers/raw/ioat/ioat_rawdev_test.c | 4 ++--
drivers/raw/ntb/ntb.c | 8 +++++++-
drivers/raw/skeleton/skeleton_rawdev.c | 5 +++--
drivers/raw/skeleton/skeleton_rawdev_test.c | 19 ++++++++++++-------
examples/ioat/ioatfwd.c | 2 +-
examples/ntb/ntb_fwd.c | 2 +-
lib/librte_rawdev/rte_rawdev.c | 6 ++++--
lib/librte_rawdev/rte_rawdev.h | 9 ++++++++-
lib/librte_rawdev/rte_rawdev_pmd.h | 5 ++++-
15 files changed, 52 insertions(+), 26 deletions(-)
diff --git a/app/test/test_rawdev.c b/app/test/test_rawdev.c
index 524a9d5f3b..d8d9595be1 100644
--- a/app/test/test_rawdev.c
+++ b/app/test/test_rawdev.c
@@ -34,7 +34,7 @@ test_rawdev_selftest_ioat(void)
for (i = 0; i < count; i++) {
struct rte_rawdev_info info = { .dev_private = NULL };
- if (rte_rawdev_info_get(i, &info) == 0 &&
+ if (rte_rawdev_info_get(i, &info, 0) == 0 &&
strstr(info.driver_name, "ioat") != NULL)
return rte_rawdev_selftest(i) == 0 ?
TEST_SUCCESS : TEST_FAILED;
diff --git a/doc/guides/rawdevs/ioat.rst b/doc/guides/rawdevs/ioat.rst
index d0eee5e237..dac52fabf1 100644
--- a/doc/guides/rawdevs/ioat.rst
+++ b/doc/guides/rawdevs/ioat.rst
@@ -107,7 +107,7 @@ rawdev device for use by an application:
for (i = 0; i < count && !found; i++) {
struct rte_rawdev_info info = { .dev_private = NULL };
- found = (rte_rawdev_info_get(i, &info) == 0 &&
+ found = (rte_rawdev_info_get(i, &info, 0) == 0 &&
strcmp(info.driver_name,
IOAT_PMD_RAWDEV_NAME_STR) == 0);
}
diff --git a/doc/guides/sample_app_ug/ioat.rst b/doc/guides/sample_app_ug/ioat.rst
index bab7654b8d..b5188220ba 100644
--- a/doc/guides/sample_app_ug/ioat.rst
+++ b/doc/guides/sample_app_ug/ioat.rst
@@ -265,7 +265,7 @@ functions:
do {
if (rdev_id == rte_rawdev_count())
goto end;
- rte_rawdev_info_get(rdev_id++, &rdev_info);
+ rte_rawdev_info_get(rdev_id++, &rdev_info, 0);
} while (strcmp(rdev_info.driver_name,
IOAT_PMD_RAWDEV_NAME_STR) != 0);
diff --git a/drivers/bus/ifpga/ifpga_bus.c b/drivers/bus/ifpga/ifpga_bus.c
index 6b16a20bb6..bb8b3dcfb9 100644
--- a/drivers/bus/ifpga/ifpga_bus.c
+++ b/drivers/bus/ifpga/ifpga_bus.c
@@ -162,7 +162,7 @@ ifpga_scan_one(struct rte_rawdev *rawdev,
afu_dev->id.port = afu_pr_conf.afu_id.port;
if (rawdev->dev_ops && rawdev->dev_ops->dev_info_get)
- rawdev->dev_ops->dev_info_get(rawdev, afu_dev);
+ rawdev->dev_ops->dev_info_get(rawdev, afu_dev, sizeof(*afu_dev));
if (rawdev->dev_ops &&
rawdev->dev_ops->dev_start &&
diff --git a/drivers/raw/ifpga/ifpga_rawdev.c b/drivers/raw/ifpga/ifpga_rawdev.c
index cc25c662bc..47cfa38778 100644
--- a/drivers/raw/ifpga/ifpga_rawdev.c
+++ b/drivers/raw/ifpga/ifpga_rawdev.c
@@ -605,7 +605,8 @@ ifpga_fill_afu_dev(struct opae_accelerator *acc,
static void
ifpga_rawdev_info_get(struct rte_rawdev *dev,
- rte_rawdev_obj_t dev_info)
+ rte_rawdev_obj_t dev_info,
+ size_t dev_info_size)
{
struct opae_adapter *adapter;
struct opae_accelerator *acc;
@@ -617,7 +618,7 @@ ifpga_rawdev_info_get(struct rte_rawdev *dev,
IFPGA_RAWDEV_PMD_FUNC_TRACE();
- if (!dev_info) {
+ if (!dev_info || dev_info_size != sizeof(*afu_dev)) {
IFPGA_RAWDEV_PMD_ERR("Invalid request");
return;
}
diff --git a/drivers/raw/ioat/ioat_rawdev.c b/drivers/raw/ioat/ioat_rawdev.c
index 87fd088aac..a5c0452d7e 100644
--- a/drivers/raw/ioat/ioat_rawdev.c
+++ b/drivers/raw/ioat/ioat_rawdev.c
@@ -111,12 +111,13 @@ ioat_dev_stop(struct rte_rawdev *dev)
}
static void
-ioat_dev_info_get(struct rte_rawdev *dev, rte_rawdev_obj_t dev_info)
+ioat_dev_info_get(struct rte_rawdev *dev, rte_rawdev_obj_t dev_info,
+ size_t dev_info_size)
{
struct rte_ioat_rawdev_config *cfg = dev_info;
struct rte_ioat_rawdev *ioat = dev->dev_private;
- if (cfg != NULL)
+ if (cfg != NULL && dev_info_size == sizeof(*cfg))
cfg->ring_size = ioat->ring_size;
}
diff --git a/drivers/raw/ioat/ioat_rawdev_test.c b/drivers/raw/ioat/ioat_rawdev_test.c
index c37351af2d..2b40222eb4 100644
--- a/drivers/raw/ioat/ioat_rawdev_test.c
+++ b/drivers/raw/ioat/ioat_rawdev_test.c
@@ -148,7 +148,7 @@ ioat_rawdev_test(uint16_t dev_id)
unsigned int nb_xstats;
unsigned int i;
- rte_rawdev_info_get(dev_id, &info);
+ rte_rawdev_info_get(dev_id, &info, sizeof(p));
if (p.ring_size != expected_ring_size) {
printf("Error, initial ring size is not as expected (Actual: %d, Expected: %d)\n",
(int)p.ring_size, expected_ring_size);
@@ -160,7 +160,7 @@ ioat_rawdev_test(uint16_t dev_id)
printf("Error with rte_rawdev_configure()\n");
return -1;
}
- rte_rawdev_info_get(dev_id, &info);
+ rte_rawdev_info_get(dev_id, &info, sizeof(p));
if (p.ring_size != IOAT_TEST_RINGSIZE) {
printf("Error, ring size is not %d (%d)\n",
IOAT_TEST_RINGSIZE, (int)p.ring_size);
diff --git a/drivers/raw/ntb/ntb.c b/drivers/raw/ntb/ntb.c
index e40412bb7e..c890c43a32 100644
--- a/drivers/raw/ntb/ntb.c
+++ b/drivers/raw/ntb/ntb.c
@@ -801,11 +801,17 @@ ntb_dequeue_bufs(struct rte_rawdev *dev,
}
static void
-ntb_dev_info_get(struct rte_rawdev *dev, rte_rawdev_obj_t dev_info)
+ntb_dev_info_get(struct rte_rawdev *dev, rte_rawdev_obj_t dev_info,
+ size_t dev_info_size)
{
struct ntb_hw *hw = dev->dev_private;
struct ntb_dev_info *info = dev_info;
+ if (dev_info_size != sizeof(*info)) {
+ NTB_LOG(ERR, "Invalid size parameter to %s", __func__);
+ return;
+ }
+
info->mw_cnt = hw->mw_cnt;
info->mw_size = hw->mw_size;
diff --git a/drivers/raw/skeleton/skeleton_rawdev.c b/drivers/raw/skeleton/skeleton_rawdev.c
index 72ece887af..dc05f3ecf8 100644
--- a/drivers/raw/skeleton/skeleton_rawdev.c
+++ b/drivers/raw/skeleton/skeleton_rawdev.c
@@ -42,14 +42,15 @@ static struct queue_buffers queue_buf[SKELETON_MAX_QUEUES] = {};
static void clear_queue_bufs(int queue_id);
static void skeleton_rawdev_info_get(struct rte_rawdev *dev,
- rte_rawdev_obj_t dev_info)
+ rte_rawdev_obj_t dev_info,
+ size_t dev_info_size)
{
struct skeleton_rawdev *skeldev;
struct skeleton_rawdev_conf *skeldev_conf;
SKELETON_PMD_FUNC_TRACE();
- if (!dev_info) {
+ if (!dev_info || dev_info_size != sizeof(*skeldev_conf)) {
SKELETON_PMD_ERR("Invalid request");
return;
}
diff --git a/drivers/raw/skeleton/skeleton_rawdev_test.c b/drivers/raw/skeleton/skeleton_rawdev_test.c
index 9ecfdee818..9b8390dfb7 100644
--- a/drivers/raw/skeleton/skeleton_rawdev_test.c
+++ b/drivers/raw/skeleton/skeleton_rawdev_test.c
@@ -106,12 +106,12 @@ test_rawdev_info_get(void)
struct rte_rawdev_info rdev_info = {0};
struct skeleton_rawdev_conf skel_conf = {0};
- ret = rte_rawdev_info_get(test_dev_id, NULL);
+ ret = rte_rawdev_info_get(test_dev_id, NULL, 0);
RTE_TEST_ASSERT(ret == -EINVAL, "Expected -EINVAL, %d", ret);
rdev_info.dev_private = &skel_conf;
- ret = rte_rawdev_info_get(test_dev_id, &rdev_info);
+ ret = rte_rawdev_info_get(test_dev_id, &rdev_info, sizeof(skel_conf));
RTE_TEST_ASSERT_SUCCESS(ret, "Failed to get raw dev info");
return TEST_SUCCESS;
@@ -142,7 +142,8 @@ test_rawdev_configure(void)
rdev_info.dev_private = &rdev_conf_get;
ret = rte_rawdev_info_get(test_dev_id,
- (rte_rawdev_obj_t)&rdev_info);
+ (rte_rawdev_obj_t)&rdev_info,
+ sizeof(rdev_conf_get));
RTE_TEST_ASSERT_SUCCESS(ret,
"Failed to obtain rawdev configuration (%d)",
ret);
@@ -170,7 +171,8 @@ test_rawdev_queue_default_conf_get(void)
/* Get the current configuration */
rdev_info.dev_private = &rdev_conf_get;
ret = rte_rawdev_info_get(test_dev_id,
- (rte_rawdev_obj_t)&rdev_info);
+ (rte_rawdev_obj_t)&rdev_info,
+ sizeof(rdev_conf_get));
RTE_TEST_ASSERT_SUCCESS(ret, "Failed to obtain rawdev configuration (%d)",
ret);
@@ -218,7 +220,8 @@ test_rawdev_queue_setup(void)
/* Get the current configuration */
rdev_info.dev_private = &rdev_conf_get;
ret = rte_rawdev_info_get(test_dev_id,
- (rte_rawdev_obj_t)&rdev_info);
+ (rte_rawdev_obj_t)&rdev_info,
+ sizeof(rdev_conf_get));
RTE_TEST_ASSERT_SUCCESS(ret,
"Failed to obtain rawdev configuration (%d)",
ret);
@@ -327,7 +330,8 @@ test_rawdev_start_stop(void)
dummy_firmware = NULL;
rte_rawdev_start(test_dev_id);
- ret = rte_rawdev_info_get(test_dev_id, (rte_rawdev_obj_t)&rdev_info);
+ ret = rte_rawdev_info_get(test_dev_id, (rte_rawdev_obj_t)&rdev_info,
+ sizeof(rdev_conf_get));
RTE_TEST_ASSERT_SUCCESS(ret,
"Failed to obtain rawdev configuration (%d)",
ret);
@@ -336,7 +340,8 @@ test_rawdev_start_stop(void)
rdev_conf_get.device_state);
rte_rawdev_stop(test_dev_id);
- ret = rte_rawdev_info_get(test_dev_id, (rte_rawdev_obj_t)&rdev_info);
+ ret = rte_rawdev_info_get(test_dev_id, (rte_rawdev_obj_t)&rdev_info,
+ sizeof(rdev_conf_get));
RTE_TEST_ASSERT_SUCCESS(ret,
"Failed to obtain rawdev configuration (%d)",
ret);
diff --git a/examples/ioat/ioatfwd.c b/examples/ioat/ioatfwd.c
index 75d8d5b9fe..76932d3dd2 100644
--- a/examples/ioat/ioatfwd.c
+++ b/examples/ioat/ioatfwd.c
@@ -757,7 +757,7 @@ assign_rawdevs(void)
do {
if (rdev_id == rte_rawdev_count())
goto end;
- rte_rawdev_info_get(rdev_id++, &rdev_info);
+ rte_rawdev_info_get(rdev_id++, &rdev_info, 0);
} while (rdev_info.driver_name == NULL ||
strcmp(rdev_info.driver_name,
IOAT_PMD_RAWDEV_NAME_STR) != 0);
diff --git a/examples/ntb/ntb_fwd.c b/examples/ntb/ntb_fwd.c
index eba8ebf9fa..11e224451c 100644
--- a/examples/ntb/ntb_fwd.c
+++ b/examples/ntb/ntb_fwd.c
@@ -1389,7 +1389,7 @@ main(int argc, char **argv)
rte_rawdev_set_attr(dev_id, NTB_QUEUE_NUM_NAME, num_queues);
printf("Set queue number as %u.\n", num_queues);
ntb_rawdev_info.dev_private = (rte_rawdev_obj_t)(&ntb_info);
- rte_rawdev_info_get(dev_id, &ntb_rawdev_info);
+ rte_rawdev_info_get(dev_id, &ntb_rawdev_info, sizeof(ntb_info));
nb_mbuf = nb_desc * num_queues * 2 * 2 + rte_lcore_count() *
MEMPOOL_CACHE_SIZE;
diff --git a/lib/librte_rawdev/rte_rawdev.c b/lib/librte_rawdev/rte_rawdev.c
index 8f84d0b228..a576890356 100644
--- a/lib/librte_rawdev/rte_rawdev.c
+++ b/lib/librte_rawdev/rte_rawdev.c
@@ -78,7 +78,8 @@ rte_rawdev_socket_id(uint16_t dev_id)
}
int
-rte_rawdev_info_get(uint16_t dev_id, struct rte_rawdev_info *dev_info)
+rte_rawdev_info_get(uint16_t dev_id, struct rte_rawdev_info *dev_info,
+ size_t dev_private_size)
{
struct rte_rawdev *rawdev;
@@ -89,7 +90,8 @@ rte_rawdev_info_get(uint16_t dev_id, struct rte_rawdev_info *dev_info)
if (dev_info->dev_private != NULL) {
RTE_FUNC_PTR_OR_ERR_RET(*rawdev->dev_ops->dev_info_get, -ENOTSUP);
- (*rawdev->dev_ops->dev_info_get)(rawdev, dev_info->dev_private);
+ (*rawdev->dev_ops->dev_info_get)(rawdev, dev_info->dev_private,
+ dev_private_size);
}
dev_info->driver_name = rawdev->driver_name;
diff --git a/lib/librte_rawdev/rte_rawdev.h b/lib/librte_rawdev/rte_rawdev.h
index 32f6b8bb03..cf6acfd261 100644
--- a/lib/librte_rawdev/rte_rawdev.h
+++ b/lib/librte_rawdev/rte_rawdev.h
@@ -82,13 +82,20 @@ struct rte_rawdev_info;
* will be returned. This can be used to safely query the type of a rawdev
* instance without needing to know the size of the private data to return.
*
+ * @param dev_private_size
+ * The length of the memory space pointed to by dev_private in dev_info.
+ * This should be set to the size of the expected private structure to be
+ * returned, and may be checked by drivers to ensure the expected struct
+ * type is provided.
+ *
* @return
* - 0: Success, driver updates the contextual information of the raw device
* - <0: Error code returned by the driver info get function.
*
*/
int
-rte_rawdev_info_get(uint16_t dev_id, struct rte_rawdev_info *dev_info);
+rte_rawdev_info_get(uint16_t dev_id, struct rte_rawdev_info *dev_info,
+ size_t dev_private_size);
/**
* Configure a raw device.
diff --git a/lib/librte_rawdev/rte_rawdev_pmd.h b/lib/librte_rawdev/rte_rawdev_pmd.h
index 4395a2182d..0e72a92058 100644
--- a/lib/librte_rawdev/rte_rawdev_pmd.h
+++ b/lib/librte_rawdev/rte_rawdev_pmd.h
@@ -138,12 +138,15 @@ rte_rawdev_pmd_is_valid_dev(uint8_t dev_id)
* Raw device pointer
* @param dev_info
* Raw device information structure
+ * @param dev_private_size
+ * The size of the structure pointed to by dev_info->dev_private
*
* @return
* Returns 0 on success
*/
typedef void (*rawdev_info_get_t)(struct rte_rawdev *dev,
- rte_rawdev_obj_t dev_info);
+ rte_rawdev_obj_t dev_info,
+ size_t dev_private_size);
/**
* Configure a device.
--
2.25.1
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