On Tue, Sep 17, 2024 at 11:58:58AM -0400, Benjamin Marzinski wrote:
> If the rport port_state is already Marginal, trying to set it to
> Marginal causes an error like the following:
>
> multipathd[365376]: /sys/devices/pci0000:c0/0000:c0:01.1/0000:c4:00.0/host0/rport-0:0-5/fc_remote_ports/rport-0:0-5: failed to set port_state to marginal: Invalid argument
>
> To avoid causing this confusing error message, check if the port_state
> is already marginal before trying to set it.
>
> Cc: Muneendra Kumar <muneendra.kumar@xxxxxxxxxxxx>
> Signed-off-by: Benjamin Marzinski <bmarzins@xxxxxxxxxx>
Ping. My in-kernel fix for this was accepted, but it would be nice to
have this work on older kernels as well.
-Ben
> ---
> multipathd/fpin_handlers.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/multipathd/fpin_handlers.c b/multipathd/fpin_handlers.c
> index be087ca0..6b56f9b7 100644
> --- a/multipathd/fpin_handlers.c
> +++ b/multipathd/fpin_handlers.c
> @@ -169,9 +169,14 @@ fpin_els_add_li_frame(struct fc_nl_event *fc_event)
> /*Sets the rport port_state to marginal*/
> static void fpin_set_rport_marginal(struct udev_device *rport_dev)
> {
> + char old_value[20]; /* match kernel show_fc_rport_port_state() size */
> static const char marginal[] = "Marginal";
> ssize_t ret;
>
> + ret = sysfs_attr_get_value(rport_dev, "port_state",
> + old_value, sizeof(old_value));
> + if (ret == sizeof(marginal) - 1 && strcmp(old_value, marginal) == 0)
> + return;
> ret = sysfs_attr_set_value(rport_dev, "port_state",
> marginal, sizeof(marginal) - 1);
> if (ret != sizeof(marginal) - 1)
> --
> 2.45.0
>
