diff options
| author | Leon Romanovsky <leonro@nvidia.com> | 2021-08-05 17:34:28 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-08-06 10:36:36 +0100 |
| commit | 5c0418ed16109759c7aec86b72f9bf56a0358526 (patch) | |
| tree | 4408cd811d6cb35d050a7c3ccdf84e0747586c2c /drivers/net/netdevsim | |
| parent | a5516053cd442f58929590349809ca0b6f154fdb (diff) | |
| download | linux-5c0418ed16109759c7aec86b72f9bf56a0358526.tar.gz linux-5c0418ed16109759c7aec86b72f9bf56a0358526.tar.bz2 linux-5c0418ed16109759c7aec86b72f9bf56a0358526.zip | |
netdevsim: Protect both reload_down and reload_up paths
Don't progress with adding and deleting ports as long as devlink
reload is running.
Fixes: 23809a726c0d ("netdevsim: Forbid devlink reload when adding or deleting ports")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netdevsim')
| -rw-r--r-- | drivers/net/netdevsim/bus.c | 10 | ||||
| -rw-r--r-- | drivers/net/netdevsim/dev.c | 12 | ||||
| -rw-r--r-- | drivers/net/netdevsim/netdevsim.h | 1 |
3 files changed, 22 insertions, 1 deletions
diff --git a/drivers/net/netdevsim/bus.c b/drivers/net/netdevsim/bus.c index a29ec264119d..62d033a1a557 100644 --- a/drivers/net/netdevsim/bus.c +++ b/drivers/net/netdevsim/bus.c @@ -196,6 +196,11 @@ new_port_store(struct device *dev, struct device_attribute *attr, if (!mutex_trylock(&nsim_bus_dev->nsim_bus_reload_lock)) return -EBUSY; + if (nsim_bus_dev->in_reload) { + mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); + return -EBUSY; + } + ret = nsim_dev_port_add(nsim_bus_dev, NSIM_DEV_PORT_TYPE_PF, port_index); mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); return ret ? ret : count; @@ -221,6 +226,11 @@ del_port_store(struct device *dev, struct device_attribute *attr, if (!mutex_trylock(&nsim_bus_dev->nsim_bus_reload_lock)) return -EBUSY; + if (nsim_bus_dev->in_reload) { + mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); + return -EBUSY; + } + ret = nsim_dev_port_del(nsim_bus_dev, NSIM_DEV_PORT_TYPE_PF, port_index); mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); return ret ? ret : count; diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c index ff5714209b86..53068e184c90 100644 --- a/drivers/net/netdevsim/dev.c +++ b/drivers/net/netdevsim/dev.c @@ -878,6 +878,7 @@ static int nsim_dev_reload_down(struct devlink *devlink, bool netns_change, mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); return -EOPNOTSUPP; } + nsim_bus_dev->in_reload = true; nsim_dev_reload_destroy(nsim_dev); mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); @@ -889,17 +890,26 @@ static int nsim_dev_reload_up(struct devlink *devlink, enum devlink_reload_actio struct netlink_ext_ack *extack) { struct nsim_dev *nsim_dev = devlink_priv(devlink); + struct nsim_bus_dev *nsim_bus_dev; + int ret; + + nsim_bus_dev = nsim_dev->nsim_bus_dev; + mutex_lock(&nsim_bus_dev->nsim_bus_reload_lock); + nsim_bus_dev->in_reload = false; if (nsim_dev->fail_reload) { /* For testing purposes, user set debugfs fail_reload * value to true. Fail right away. */ NL_SET_ERR_MSG_MOD(extack, "User setup the reload to fail for testing purposes"); + mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); return -EINVAL; } *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT); - return nsim_dev_reload_create(nsim_dev, extack); + ret = nsim_dev_reload_create(nsim_dev, extack); + mutex_unlock(&nsim_bus_dev->nsim_bus_reload_lock); + return ret; } static int nsim_dev_info_get(struct devlink *devlink, diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index 1c20bcbd9d91..793c86dc5a9c 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -362,6 +362,7 @@ struct nsim_bus_dev { struct nsim_vf_config *vfconfigs; /* Lock for devlink->reload_enabled in netdevsim module */ struct mutex nsim_bus_reload_lock; + bool in_reload; bool init; }; |