diff options
| author |   Jacob Keller <jacob.e.keller@intel.com> | 2020-03-26 11:37:17 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-03-26 19:39:26 -0700 |
| commit | 3fe0fd531a35c229f8309c8b74ef0226de2626ab (patch) | |
| tree | e618e319a54a0fde459cc608e313faf046ff2c21 /drivers/net/netdevsim | |
| parent | devlink: implement DEVLINK_CMD_REGION_NEW (diff) | |
| download | linux-dev-3fe0fd531a35c229f8309c8b74ef0226de2626ab.tar.xz linux-dev-3fe0fd531a35c229f8309c8b74ef0226de2626ab.zip | |
netdevsim: support taking immediate snapshot via devlink
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>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netdevsim')
| -rw-r--r-- | drivers/net/netdevsim/dev.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c index f4f6539f1e17..2b727a7001f6 100644 --- a/drivers/net/netdevsim/dev.c +++ b/drivers/net/netdevsim/dev.c @@ -39,23 +39,38 @@ 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) +{ + void *dummy_data; + + 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); + + *data = dummy_data; + + 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; struct devlink *devlink; - void *dummy_data; + u8 *dummy_data; int err; u32 id; devlink = priv_to_devlink(nsim_dev); - 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(devlink, NULL, &dummy_data); + if (err) + return err; err = devlink_region_snapshot_id_get(devlink, &id); if (err) { @@ -351,6 +366,7 @@ static void nsim_devlink_param_load_driverinit_values(struct devlink *devlink) static const struct devlink_region_ops dummy_region_ops = { .name = "dummy", .destructor = &kfree, + .snapshot = nsim_dev_take_snapshot, }; static int nsim_dev_dummy_region_init(struct nsim_dev *nsim_dev, |