From: Jacob Keller <jacob.e.keller@intel.com>
To: netdev@vger.kernel.org
Cc: jiri@resnulli.us, valex@mellanox.com, linyunsheng@huawei.com,
lihong.yang@intel.com, Jacob Keller <jacob.e.keller@intel.com>
Subject: [PATCH 04/15] netdevsim: support taking immediate snapshot via devlink
Date: Thu, 30 Jan 2020 14:58:59 -0800 [thread overview]
Message-ID: <20200130225913.1671982-5-jacob.e.keller@intel.com> (raw)
In-Reply-To: <20200130225913.1671982-1-jacob.e.keller@intel.com>
Implement the .snapshot region operation for the dummy data region. This
enables a region snapshot to be taken upon request via the new
DEVLINK_CMD_REGION_SNAPSHOT command.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
---
drivers/net/netdevsim/dev.c | 38 +++++++++++++++----
.../drivers/net/netdevsim/devlink.sh | 5 +++
2 files changed, 36 insertions(+), 7 deletions(-)
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index d521b7bfe007..924cd328037f 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -38,24 +38,47 @@ static struct dentry *nsim_dev_ddir;
#define NSIM_DEV_DUMMY_REGION_SIZE (1024 * 32)
+static int nsim_dev_take_snapshot(struct devlink *devlink,
+ struct netlink_ext_ack *extack,
+ u8 **data,
+ devlink_snapshot_data_dest_t **destructor)
+{
+ void *dummy_data;
+
+ dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
+ if (!dummy_data) {
+ NL_SET_ERR_MSG(extack, "Out of memory");
+ return -ENOMEM;
+ }
+
+ get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
+
+ *data = dummy_data;
+ *destructor = kfree;
+
+ return 0;
+}
+
static ssize_t nsim_dev_take_snapshot_write(struct file *file,
const char __user *data,
size_t count, loff_t *ppos)
{
struct nsim_dev *nsim_dev = file->private_data;
- void *dummy_data;
+ devlink_snapshot_data_dest_t *destructor;
+ u8 *dummy_data;
int err;
u32 id;
- dummy_data = kmalloc(NSIM_DEV_DUMMY_REGION_SIZE, GFP_KERNEL);
- if (!dummy_data)
- return -ENOMEM;
-
- get_random_bytes(dummy_data, NSIM_DEV_DUMMY_REGION_SIZE);
+ err = nsim_dev_take_snapshot(priv_to_devlink(nsim_dev), NULL,
+ &dummy_data, &destructor);
+ if (err) {
+ pr_err("Failed to capture region snapshot\n");
+ return err;
+ }
id = devlink_region_snapshot_id_get(priv_to_devlink(nsim_dev));
err = devlink_region_snapshot_create(nsim_dev->dummy_region,
- dummy_data, id, kfree);
+ dummy_data, id, destructor);
if (err) {
pr_err("Failed to create region snapshot\n");
kfree(dummy_data);
@@ -244,6 +267,7 @@ static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink)
static const struct devlink_region_ops dummy_region_ops = {
.name = "dummy",
+ .snapshot = nsim_dev_take_snapshot,
};
static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev,
diff --git a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
index 025a84c2ab5a..e7827a092478 100755
--- a/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
+++ b/tools/testing/selftests/drivers/net/netdevsim/devlink.sh
@@ -141,6 +141,11 @@ regions_test()
check_region_snapshot_count dummy post-first-delete 2
+ devlink region snapshot $DL_HANDLE/dummy
+ check_err $? "Failed to request a snapshot"
+
+ check_region_snapshot_count dummy post-request 3
+
log_test "regions test"
}
--
2.25.0.rc1
next prev parent reply other threads:[~2020-01-30 22:59 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-30 22:58 [RFC PATCH 00/13] devlink direct region reading Jacob Keller
2020-01-30 22:58 ` [PATCH 01/15] devlink: prepare to support region operations Jacob Keller
2020-01-31 18:07 ` Jakub Kicinski
2020-02-03 11:35 ` Jiri Pirko
2020-02-03 16:48 ` Jacob Keller
2020-02-03 17:07 ` Jacob Keller
2020-02-03 17:10 ` Jacob Keller
2020-02-03 17:14 ` Jacob Keller
2020-02-03 17:17 ` Jacob Keller
2020-01-30 22:58 ` [PATCH 02/15] devlink: add functions to take snapshot while locked Jacob Keller
2020-01-31 18:07 ` Jakub Kicinski
2020-01-31 18:09 ` Jacob Keller
2020-02-03 11:39 ` Jiri Pirko
2020-02-03 16:45 ` Jacob Keller
2020-01-30 22:58 ` [PATCH 03/15] devlink: add operation to take an immediate snapshot Jacob Keller
2020-01-31 18:07 ` Jakub Kicinski
2020-02-03 8:19 ` Yunsheng Lin
2020-02-03 11:50 ` Jiri Pirko
2020-02-03 11:50 ` Jiri Pirko
2020-02-03 16:33 ` Jacob Keller
2020-02-03 19:32 ` Jacob Keller
2020-02-03 21:30 ` Jiri Pirko
2020-02-04 19:20 ` Jacob Keller
2020-01-30 22:58 ` Jacob Keller [this message]
2020-01-31 18:07 ` [PATCH 04/15] netdevsim: support taking immediate snapshot via devlink Jakub Kicinski
2020-01-31 18:12 ` Jacob Keller
2020-01-30 22:59 ` [PATCH 05/15] ice: use __le16 types for explicitly Little Endian values Jacob Keller
2020-01-30 22:59 ` [PATCH 06/15] ice: create function to read a section of the NVM and Shadow RAM Jacob Keller
2020-01-30 22:59 ` [PATCH 07/15] ice: implement full NVM read from ETHTOOL_GEEPROM Jacob Keller
2020-01-30 22:59 ` [PATCH 08/15] devlink: add devres managed devlinkm_alloc and devlinkm_free Jacob Keller
2020-01-31 18:07 ` Jakub Kicinski
2020-01-31 18:16 ` Jacob Keller
2020-01-31 18:07 ` Jakub Kicinski
2020-02-01 0:51 ` Jacob Keller
2020-02-01 17:43 ` Jakub Kicinski
2020-02-03 16:35 ` Jacob Keller
2020-02-03 11:29 ` Jiri Pirko
2020-02-03 16:56 ` Jacob Keller
2020-01-30 22:59 ` [PATCH 09/15] ice: enable initial devlink support Jacob Keller
2020-01-30 22:59 ` [PATCH 10/15] ice: add basic handler for devlink .info_get Jacob Keller
2020-01-31 18:07 ` Jakub Kicinski
2020-01-31 18:25 ` Jacob Keller
2020-01-30 22:59 ` [PATCH 11/15] ice: add board identifier info to " Jacob Keller
2020-01-31 18:07 ` Jakub Kicinski
2020-01-31 18:26 ` Jacob Keller
2020-01-30 22:59 ` [PATCH 12/15] ice: add a devlink region to dump shadow RAM contents Jacob Keller
2020-01-30 22:59 ` [PATCH 13/15] devlink: support directly reading from region memory Jacob Keller
2020-01-31 18:07 ` Jakub Kicinski
2020-01-31 18:27 ` Jacob Keller
2020-01-31 19:15 ` Jacob Keller
2020-02-03 13:44 ` Jiri Pirko
2020-02-03 16:40 ` Jacob Keller
2020-01-30 22:59 ` [PATCH 14/15] ice: support direct read of the shadow ram region Jacob Keller
2020-01-30 22:59 ` [PATCH 15/15] ice: add ice.rst devlink documentation file Jacob Keller
2020-01-31 18:07 ` Jakub Kicinski
2020-01-31 18:28 ` Jacob Keller
2020-01-30 22:59 ` [RFC PATCH 1/3] Update kernel headers Jacob Keller
2020-01-30 22:59 ` [RFC PATCH 2/3] devlink: add support for DEVLINK_CMD_REGION_TAKE_SNAPSHOT Jacob Keller
2020-01-30 22:59 ` [RFC PATCH 3/3] devlink: stop requiring snapshot for regions Jacob Keller
2020-01-30 23:03 ` [RFC PATCH 00/13] devlink direct region reading Jacob Keller
2020-01-31 18:06 ` Jakub Kicinski
2020-01-31 18:09 ` Jacob Keller
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