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Message-ID: <87sfbd4kfb.fsf@nvidia.com>
Date: Tue, 30 May 2023 21:58:33 +0200
From: Petr Machata <petrm@...dia.com>
To: Daniel Machon <daniel.machon@...rochip.com>
CC: <netdev@...r.kernel.org>, <dsahern@...nel.org>,
<stephen@...workplumber.org>, <petrm@...dia.com>,
<UNGLinuxDriver@...rochip.com>
Subject: Re: [PATCH iproute2-next v2 5/8] dcb: rewr: add new dcb-rewr
subcommand
Daniel Machon <daniel.machon@...rochip.com> writes:
> Add a new subcommand 'rewr' for configuring the in-kernel DCB rewrite
> table. The rewr-table of the kernel is similar to the APP-table, and so
> is this new subcommand. Therefore, much of the existing bookkeeping code
> from dcb-app, can be reused in the dcb-rewr implementation.
>
> Initially, only support for configuring PCP and DSCP-based rewrite has
> been added.
>
> Signed-off-by: Daniel Machon <daniel.machon@...rochip.com>
Looks good overall, barring the comment about dcb_app_parse_mapping_cb()
that I made in the other patch, and a handful of nits below.
> ---
> dcb/Makefile | 3 +-
> dcb/dcb.c | 4 +-
> dcb/dcb.h | 32 ++++++
> dcb/dcb_app.c | 49 ++++----
> dcb/dcb_rewr.c | 355 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 416 insertions(+), 27 deletions(-)
> diff --git a/dcb/dcb.h b/dcb/dcb.h
> index b3bc30cd02c5..092dc90e8358 100644
> --- a/dcb/dcb.h
> +++ b/dcb/dcb.h
> @@ -54,6 +54,10 @@ void dcb_print_array_on_off(const __u8 *array, size_t size);
> void dcb_print_array_kw(const __u8 *array, size_t array_size,
> const char *const kw[], size_t kw_size);
>
> +/* dcp_rewr.c */
> +
> +int dcb_cmd_rewr(struct dcb *dcb, int argc, char **argv);
> +
> /* dcb_app.c */
>
> struct dcb_app_table {
> @@ -70,8 +74,29 @@ struct dcb_app_parse_mapping {
> int err;
> };
>
> +#define DCB_APP_PCP_MAX 15
This should be removed from dcb_app.c as well.
> +#define DCB_APP_DSCP_MAX 63
DCB_APP_DSCP_MAX should be introduced in a separate patch together with
the s/63/DCB_APP_DSCP_MAX/ of the existing code, instead of including it
all here. It's a concern separate from the main topic of the patch.
> +
> int dcb_cmd_app(struct dcb *dcb, int argc, char **argv);
>
> +int dcb_app_get(struct dcb *dcb, const char *dev, struct dcb_app_table *tab);
> +int dcb_app_add_del(struct dcb *dcb, const char *dev, int command,
> + const struct dcb_app_table *tab,
> + bool (*filter)(const struct dcb_app *));
> +
> +bool dcb_app_is_dscp(const struct dcb_app *app);
> +bool dcb_app_is_pcp(const struct dcb_app *app);
> +
> +int dcb_app_print_pid_dscp(__u16 protocol);
> +int dcb_app_print_pid_pcp(__u16 protocol);
> +int dcb_app_print_pid_dec(__u16 protocol);
> +void dcb_app_print_filtered(const struct dcb_app_table *tab,
> + bool (*filter)(const struct dcb_app *),
> + void (*print_pid_prio)(int (*print_pid)(__u16),
> + const struct dcb_app *),
> + int (*print_pid)(__u16 protocol),
> + const char *json_name, const char *fp_name);
> +
> enum ieee_attrs_app dcb_app_attr_type_get(__u8 selector);
> bool dcb_app_attr_type_validate(enum ieee_attrs_app type);
> bool dcb_app_selector_validate(enum ieee_attrs_app type, __u8 selector);
> @@ -80,11 +105,18 @@ bool dcb_app_pid_eq(const struct dcb_app *aa, const struct dcb_app *ab);
> bool dcb_app_prio_eq(const struct dcb_app *aa, const struct dcb_app *ab);
>
> int dcb_app_table_push(struct dcb_app_table *tab, struct dcb_app *app);
> +int dcb_app_table_copy(struct dcb_app_table *a, const struct dcb_app_table *b);
> +void dcb_app_table_sort(struct dcb_app_table *tab);
> +void dcb_app_table_fini(struct dcb_app_table *tab);
> +void dcb_app_table_remove_existing(struct dcb_app_table *a,
> + const struct dcb_app_table *b);
> void dcb_app_table_remove_replaced(struct dcb_app_table *a,
> const struct dcb_app_table *b,
> bool (*key_eq)(const struct dcb_app *aa,
> const struct dcb_app *ab));
>
> +int dcb_app_parse_pcp(__u32 *key, const char *arg);
> +int dcb_app_parse_dscp(__u32 *key, const char *arg);
> void dcb_app_parse_mapping_cb(__u32 key, __u64 value, void *data);
>
> /* dcb_apptrust.c */
> diff --git a/dcb/dcb_app.c b/dcb/dcb_app.c
> index 97cba658aa6b..3cb1bb302ed6 100644
> --- a/dcb/dcb_app.c
> +++ b/dcb/dcb_app.c
> @@ -643,9 +642,9 @@ static int dcb_app_add_del_cb(struct dcb *dcb, struct nlmsghdr *nlh, void *data)
> +static int dcb_cmd_rewr_replace(struct dcb *dcb, const char *dev, int argc,
> + char **argv)
> +{
[...]
> +}
> +
> +
Two blank lines.
> +static int dcb_cmd_rewr_show(struct dcb *dcb, const char *dev, int argc,
> + char **argv)
> +{
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