Re: [PATCH 3/4] tcm_fc: Convert acl lookup to modern get_initiator_node_acl usage

From: Christoph Hellwig
Date: Fri Jan 08 2016 - 03:21:21 EST


On Fri, Jan 08, 2016 at 07:15:47AM +0000, Nicholas A. Bellinger wrote:
> From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
>
> This patch does a simple conversion of tcm_fc code to use
> proper modern core_tpg_get_initiator_node_acl() lookup using
> se_node_acl->acl_kref, and drops the legacy list walk from
> ft_acl_get().
>
> Note the original lookup also took node_name into account,
> but since ft_init_nodeacl() only ever sets port_name for
> se_node_acl->acl_group within configfs, this is purely
> a mechanical change.
>
> Cc: Vasu Dev <vasu.dev@xxxxxxxxxxxxxxx>
> Cc: Sagi Grimberg <sagig@xxxxxxxxxxxx>
> Cc: Christoph Hellwig <hch@xxxxxx>
> Cc: Hannes Reinecke <hare@xxxxxxx>
> Cc: Andy Grover <agrover@xxxxxxxxxx>
> Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
> ---
> drivers/target/tcm_fc/tfc_conf.c | 26 ++++++++------------------
> drivers/target/tcm_fc/tfc_sess.c | 18 +++++++++++-------
> 2 files changed, 19 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/target/tcm_fc/tfc_conf.c b/drivers/target/tcm_fc/tfc_conf.c
> index 9cdb2ac..9389ba3 100644
> --- a/drivers/target/tcm_fc/tfc_conf.c
> +++ b/drivers/target/tcm_fc/tfc_conf.c
> @@ -222,27 +222,17 @@ static int ft_init_nodeacl(struct se_node_acl *nacl, const char *name)
>
> struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata)
> {
> struct se_portal_group *se_tpg = &tpg->se_tpg;
> struct se_node_acl *se_acl;
> + unsigned char initiatorname[TRANSPORT_IQN_LEN];
>
> + ft_format_wwn(&initiatorname[0], TRANSPORT_IQN_LEN, rdata->ids.port_name);
> +
> + se_acl = core_tpg_get_initiator_node_acl(se_tpg, &initiatorname[0]);
> + if (!se_acl)
> + return NULL;
> +
> + return container_of(se_acl, struct ft_node_acl, se_node_acl);

I'd say kill this function and opencode it in ft_sess_create. It
shouldn't be used elsewhere, and ft_sess_create really wants the
se_node_acl and not the ft_node_acl anyway.

Btw, who is dropping the reference we're acuiring through
core_tpg_get_initiator_node_acl?