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devlink: hold the instance lock during eswitch_mode callbacks

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Make the devlink core hold the instance lock during eswitch_mode
callbacks. Cheat in case of mlx5 (see the cover letter).

Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
2022-03-18 12:23:44 -07:00
committed by David S. Miller
parent aff3a92509
commit 14e426bf1a
5 changed files with 54 additions and 51 deletions
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6
net/core/devlink.c
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@@ -2868,15 +2868,11 @@ static int devlink_rate_nodes_check(struct devlink *devlink, u16 mode,
{
struct devlink_rate *devlink_rate;
/* Take the lock to sync with destroy */
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_rate, &devlink->rate_list, list)
if (devlink_rate_is_node(devlink_rate)) {
mutex_unlock(&devlink->lock);
NL_SET_ERR_MSG_MOD(extack, "Rate node(s) exists.");
return -EBUSY;
}
mutex_unlock(&devlink->lock);
return 0;
}
@@ -8735,14 +8731,12 @@ static const struct genl_small_ops devlink_nl_ops[] = {
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_eswitch_get_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_ESWITCH_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_eswitch_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_DPIPE_TABLE_GET,