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Subject[PATCH iproute2-next V4] devlink: add support for port params get/set
Date
Add implementation for the port parameters
getting/setting.
Add bash completion for port param.
Add man description for port param.

Signed-off-by: Oleksandr Mazur <oleksandr.mazur@plvision.eu>
---
V4:
1) Rebase on top of master;
2) Add missed space in after else-if-clause bracket;
V3:
1) Add usage example;
2) Remove stray newline in code;
V2:
1) Add bash completion for port param;
2) Add man decsription / examples for port param;

bash-completion/devlink | 55 ++++++++
devlink/devlink.c | 274 +++++++++++++++++++++++++++++++++++++++-
man/man8/devlink-port.8 | 65 ++++++++++
3 files changed, 388 insertions(+), 6 deletions(-)

diff --git a/bash-completion/devlink b/bash-completion/devlink
index 7395b504..361be9fe 100644
--- a/bash-completion/devlink
+++ b/bash-completion/devlink
@@ -319,6 +319,57 @@ _devlink_port_split()
esac
}

+# Completion for devlink port param set
+_devlink_port_param_set()
+{
+ case $cword in
+ 7)
+ COMPREPLY=( $( compgen -W "value" -- "$cur" ) )
+ return
+ ;;
+ 8)
+ # String argument
+ return
+ ;;
+ 9)
+ COMPREPLY=( $( compgen -W "cmode" -- "$cur" ) )
+ return
+ ;;
+ 10)
+ COMPREPLY=( $( compgen -W "runtime driverinit permanent" -- \
+ "$cur" ) )
+ return
+ ;;
+ esac
+}
+
+# Completion for devlink port param
+_devlink_port_param()
+{
+ case "$cword" in
+ 3)
+ COMPREPLY=( $( compgen -W "show set" -- "$cur" ) )
+ return
+ ;;
+ 4)
+ _devlink_direct_complete "port"
+ return
+ ;;
+ 5)
+ COMPREPLY=( $( compgen -W "name" -- "$cur" ) )
+ return
+ ;;
+ 6)
+ _devlink_direct_complete "param_name"
+ return
+ ;;
+ esac
+
+ if [[ "${words[3]}" == "set" ]]; then
+ _devlink_port_param_set
+ fi
+}
+
# Completion for devlink port
_devlink_port()
{
@@ -331,6 +382,10 @@ _devlink_port()
_devlink_port_split
return
;;
+ param)
+ _devlink_port_param
+ return
+ ;;
show|unsplit)
if [[ $cword -eq 3 ]]; then
_devlink_direct_complete "port"
diff --git a/devlink/devlink.c b/devlink/devlink.c
index 10398f77..c6e85ff9 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -2808,7 +2808,8 @@ static void pr_out_param_value(struct dl *dl, const char *nla_name,
}
}

-static void pr_out_param(struct dl *dl, struct nlattr **tb, bool array)
+static void pr_out_param(struct dl *dl, struct nlattr **tb, bool array,
+ bool is_port_param)
{
struct nlattr *nla_param[DEVLINK_ATTR_MAX + 1] = {};
struct nlattr *param_value_attr;
@@ -2825,9 +2826,15 @@ static void pr_out_param(struct dl *dl, struct nlattr **tb, bool array)
return;

if (array)
- pr_out_handle_start_arr(dl, tb);
+ if (is_port_param)
+ pr_out_port_handle_start_arr(dl, tb, false);
+ else
+ pr_out_handle_start_arr(dl, tb);
else
- __pr_out_handle_start(dl, tb, true, false);
+ if (is_port_param)
+ pr_out_port_handle_start(dl, tb, false);
+ else
+ __pr_out_handle_start(dl, tb, true, false);

nla_type = mnl_attr_get_u8(nla_param[DEVLINK_ATTR_PARAM_TYPE]);

@@ -2847,7 +2854,10 @@ static void pr_out_param(struct dl *dl, struct nlattr **tb, bool array)
pr_out_entry_end(dl);
}
pr_out_array_end(dl);
- pr_out_handle_end(dl);
+ if (is_port_param)
+ pr_out_port_handle_end(dl);
+ else
+ pr_out_handle_end(dl);
}

static int cmd_dev_param_show_cb(const struct nlmsghdr *nlh, void *data)
@@ -2860,7 +2870,7 @@ static int cmd_dev_param_show_cb(const struct nlmsghdr *nlh, void *data)
if (!tb[DEVLINK_ATTR_BUS_NAME] || !tb[DEVLINK_ATTR_DEV_NAME] ||
!tb[DEVLINK_ATTR_PARAM])
return MNL_CB_ERROR;
- pr_out_param(dl, tb, true);
+ pr_out_param(dl, tb, true, false);
return MNL_CB_OK;
}

@@ -3058,6 +3068,21 @@ err_param_value_parse:
return err;
}

+static int cmd_port_param_show_cb(const struct nlmsghdr *nlh, void *data)
+{
+ struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
+ struct nlattr *tb[DEVLINK_ATTR_MAX + 1] = {};
+ struct dl *dl = data;
+
+ mnl_attr_parse(nlh, sizeof(*genl), attr_cb, tb);
+ if (!tb[DEVLINK_ATTR_BUS_NAME] || !tb[DEVLINK_ATTR_DEV_NAME] ||
+ !tb[DEVLINK_ATTR_PORT_INDEX] || !tb[DEVLINK_ATTR_PARAM])
+ return MNL_CB_ERROR;
+
+ pr_out_param(dl, tb, true, true);
+ return MNL_CB_OK;
+}
+
static int cmd_dev_param_show(struct dl *dl)
{
uint16_t flags = NLM_F_REQUEST | NLM_F_ACK;
@@ -3803,6 +3828,8 @@ static void cmd_port_help(void)
pr_err(" devlink port split DEV/PORT_INDEX count COUNT\n");
pr_err(" devlink port unsplit DEV/PORT_INDEX\n");
pr_err(" devlink port function set DEV/PORT_INDEX [ hw_addr ADDR ] [ state STATE ]\n");
+ pr_err(" devlink port param set DEV/PORT_INDEX name PARAMETER value VALUE cmode { permanent | driverinit | runtime }\n");
+ pr_err(" devlink port param show [DEV/PORT_INDEX name PARAMETER]\n");
pr_err(" devlink port health show [ DEV/PORT_INDEX reporter REPORTER_NAME ]\n");
pr_err(" devlink port add DEV/PORT_INDEX flavour FLAVOUR pfnum PFNUM [ sfnum SFNUM ]\n");
pr_err(" devlink port del DEV/PORT_INDEX\n");
@@ -4065,6 +4092,31 @@ static int cmd_port_unsplit(struct dl *dl)
return _mnlg_socket_sndrcv(dl->nlg, nlh, NULL, NULL);
}

+static int cmd_port_param_show(struct dl *dl)
+{
+ uint16_t flags = NLM_F_REQUEST | NLM_F_ACK;
+ struct nlmsghdr *nlh;
+ int err;
+
+ if (dl_argc(dl) == 0)
+ flags |= NLM_F_DUMP;
+
+ nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_PORT_PARAM_GET, flags);
+
+ if (dl_argc(dl) > 0) {
+ err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLEP |
+ DL_OPT_PARAM_NAME, 0);
+ if (err)
+ return err;
+ }
+
+ pr_out_section_start(dl, "param");
+ err = _mnlg_socket_sndrcv(dl->nlg, nlh, cmd_port_param_show_cb, dl);
+ pr_out_section_end(dl);
+
+ return err;
+}
+
static void cmd_port_function_help(void)
{
pr_err("Usage: devlink port function set DEV/PORT_INDEX [ hw_addr ADDR ] [ state STATE ]\n");
@@ -4089,6 +4141,205 @@ static int cmd_port_function_set(struct dl *dl)
return _mnlg_socket_sndrcv(dl->nlg, nlh, NULL, NULL);
}

+static int cmd_port_param_set_cb(const struct nlmsghdr *nlh, void *data)
+{
+ struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
+ struct nlattr *nla_param[DEVLINK_ATTR_MAX + 1] = {};
+ struct nlattr *tb[DEVLINK_ATTR_MAX + 1] = {};
+ struct nlattr *param_value_attr;
+ enum devlink_param_cmode cmode;
+ struct param_ctx *ctx = data;
+ struct dl *dl = ctx->dl;
+ int nla_type;
+ int err;
+
+ mnl_attr_parse(nlh, sizeof(*genl), attr_cb, tb);
+ if (!tb[DEVLINK_ATTR_BUS_NAME] || !tb[DEVLINK_ATTR_DEV_NAME] ||
+ !tb[DEVLINK_ATTR_PORT_INDEX] || !tb[DEVLINK_ATTR_PARAM])
+ return MNL_CB_ERROR;
+
+ err = mnl_attr_parse_nested(tb[DEVLINK_ATTR_PARAM], attr_cb, nla_param);
+ if (err != MNL_CB_OK)
+ return MNL_CB_ERROR;
+
+ if (!nla_param[DEVLINK_ATTR_PARAM_TYPE] ||
+ !nla_param[DEVLINK_ATTR_PARAM_VALUES_LIST])
+ return MNL_CB_ERROR;
+
+ nla_type = mnl_attr_get_u8(nla_param[DEVLINK_ATTR_PARAM_TYPE]);
+ mnl_attr_for_each_nested(param_value_attr,
+ nla_param[DEVLINK_ATTR_PARAM_VALUES_LIST]) {
+ struct nlattr *nla_value[DEVLINK_ATTR_MAX + 1] = {};
+ struct nlattr *val_attr;
+
+ err = mnl_attr_parse_nested(param_value_attr,
+ attr_cb, nla_value);
+ if (err != MNL_CB_OK)
+ return MNL_CB_ERROR;
+
+ if (!nla_value[DEVLINK_ATTR_PARAM_VALUE_CMODE] ||
+ (nla_type != MNL_TYPE_FLAG &&
+ !nla_value[DEVLINK_ATTR_PARAM_VALUE_DATA]))
+ return MNL_CB_ERROR;
+
+ cmode = mnl_attr_get_u8(nla_value[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
+ if (cmode == dl->opts.cmode) {
+ val_attr = nla_value[DEVLINK_ATTR_PARAM_VALUE_DATA];
+ switch (nla_type) {
+ case MNL_TYPE_U8:
+ ctx->value.vu8 = mnl_attr_get_u8(val_attr);
+ break;
+ case MNL_TYPE_U16:
+ ctx->value.vu16 = mnl_attr_get_u16(val_attr);
+ break;
+ case MNL_TYPE_U32:
+ ctx->value.vu32 = mnl_attr_get_u32(val_attr);
+ break;
+ case MNL_TYPE_STRING:
+ ctx->value.vstr = mnl_attr_get_str(val_attr);
+ break;
+ case MNL_TYPE_FLAG:
+ ctx->value.vbool = val_attr ? true : false;
+ break;
+ }
+ break;
+ }
+ }
+ ctx->nla_type = nla_type;
+ return MNL_CB_OK;
+}
+
+static int cmd_port_param_set(struct dl *dl)
+{
+ struct param_ctx ctx = {};
+ struct nlmsghdr *nlh;
+ bool conv_exists;
+ uint32_t val_u32 = 0;
+ uint16_t val_u16;
+ uint8_t val_u8;
+ bool val_bool;
+ int err;
+
+ err = dl_argv_parse(dl, DL_OPT_HANDLEP |
+ DL_OPT_PARAM_NAME |
+ DL_OPT_PARAM_VALUE |
+ DL_OPT_PARAM_CMODE, 0);
+ if (err)
+ return err;
+
+ /* Get value type */
+ nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_PORT_PARAM_GET,
+ NLM_F_REQUEST | NLM_F_ACK);
+ dl_opts_put(nlh, dl);
+
+ ctx.dl = dl;
+ err = _mnlg_socket_sndrcv(dl->nlg, nlh, cmd_port_param_set_cb, &ctx);
+ if (err)
+ return err;
+
+ nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_PORT_PARAM_SET,
+ NLM_F_REQUEST | NLM_F_ACK);
+ dl_opts_put(nlh, dl);
+
+ conv_exists = param_val_conv_exists(param_val_conv, PARAM_VAL_CONV_LEN,
+ dl->opts.param_name);
+
+ mnl_attr_put_u8(nlh, DEVLINK_ATTR_PARAM_TYPE, ctx.nla_type);
+ switch (ctx.nla_type) {
+ case MNL_TYPE_U8:
+ if (conv_exists) {
+ err = param_val_conv_uint_get(param_val_conv,
+ PARAM_VAL_CONV_LEN,
+ dl->opts.param_name,
+ dl->opts.param_value,
+ &val_u32);
+ val_u8 = val_u32;
+ } else {
+ err = strtouint8_t(dl->opts.param_value, &val_u8);
+ }
+ if (err)
+ goto err_param_value_parse;
+ if (val_u8 == ctx.value.vu8)
+ return 0;
+ mnl_attr_put_u8(nlh, DEVLINK_ATTR_PARAM_VALUE_DATA, val_u8);
+ break;
+ case MNL_TYPE_U16:
+ if (conv_exists) {
+ err = param_val_conv_uint_get(param_val_conv,
+ PARAM_VAL_CONV_LEN,
+ dl->opts.param_name,
+ dl->opts.param_value,
+ &val_u32);
+ val_u16 = val_u32;
+ } else {
+ err = strtouint16_t(dl->opts.param_value, &val_u16);
+ }
+ if (err)
+ goto err_param_value_parse;
+ if (val_u16 == ctx.value.vu16)
+ return 0;
+ mnl_attr_put_u16(nlh, DEVLINK_ATTR_PARAM_VALUE_DATA, val_u16);
+ break;
+ case MNL_TYPE_U32:
+ if (conv_exists)
+ err = param_val_conv_uint_get(param_val_conv,
+ PARAM_VAL_CONV_LEN,
+ dl->opts.param_name,
+ dl->opts.param_value,
+ &val_u32);
+ else
+ err = strtouint32_t(dl->opts.param_value, &val_u32);
+ if (err)
+ goto err_param_value_parse;
+ if (val_u32 == ctx.value.vu32)
+ return 0;
+ mnl_attr_put_u32(nlh, DEVLINK_ATTR_PARAM_VALUE_DATA, val_u32);
+ break;
+ case MNL_TYPE_FLAG:
+ err = strtobool(dl->opts.param_value, &val_bool);
+ if (err)
+ goto err_param_value_parse;
+ if (val_bool == ctx.value.vbool)
+ return 0;
+ if (val_bool)
+ mnl_attr_put(nlh, DEVLINK_ATTR_PARAM_VALUE_DATA,
+ 0, NULL);
+ break;
+ case MNL_TYPE_STRING:
+ mnl_attr_put_strz(nlh, DEVLINK_ATTR_PARAM_VALUE_DATA,
+ dl->opts.param_value);
+ if (!strcmp(dl->opts.param_value, ctx.value.vstr))
+ return 0;
+ break;
+ default:
+ printf("Value type not supported\n");
+ return -ENOTSUP;
+ }
+ return _mnlg_socket_sndrcv(dl->nlg, nlh, NULL, NULL);
+
+err_param_value_parse:
+ pr_err("Value \"%s\" is not a number or not within range\n",
+ dl->opts.param_value);
+ return err;
+}
+
+static int cmd_port_param(struct dl *dl)
+{
+ if (dl_argv_match(dl, "help")) {
+ cmd_port_help();
+ return 0;
+ } else if (dl_argv_match(dl, "show") ||
+ dl_argv_match(dl, "list") || dl_no_arg(dl)) {
+ dl_arg_inc(dl);
+ return cmd_port_param_show(dl);
+ } else if (dl_argv_match(dl, "set")) {
+ dl_arg_inc(dl);
+ return cmd_port_param_set(dl);
+ }
+ pr_err("Command \"%s\" not found\n", dl_argv(dl));
+ return -ENOENT;
+}
+
static int cmd_port_function(struct dl *dl)
{
if (dl_argv_match(dl, "help") || dl_no_arg(dl)) {
@@ -4175,6 +4426,9 @@ static int cmd_port(struct dl *dl)
} else if (dl_argv_match(dl, "unsplit")) {
dl_arg_inc(dl);
return cmd_port_unsplit(dl);
+ } else if (dl_argv_match(dl, "param")) {
+ dl_arg_inc(dl);
+ return cmd_port_param(dl);
} else if (dl_argv_match(dl, "function")) {
dl_arg_inc(dl);
return cmd_port_function(dl);
@@ -4996,6 +5250,10 @@ static const char *cmd_name(uint8_t cmd)
case DEVLINK_CMD_REGION_SET: return "set";
case DEVLINK_CMD_REGION_NEW: return "new";
case DEVLINK_CMD_REGION_DEL: return "del";
+ case DEVLINK_CMD_PORT_PARAM_GET: return "get";
+ case DEVLINK_CMD_PORT_PARAM_SET: return "set";
+ case DEVLINK_CMD_PORT_PARAM_NEW: return "new";
+ case DEVLINK_CMD_PORT_PARAM_DEL: return "del";
case DEVLINK_CMD_FLASH_UPDATE: return "begin";
case DEVLINK_CMD_FLASH_UPDATE_END: return "end";
case DEVLINK_CMD_FLASH_UPDATE_STATUS: return "status";
@@ -5034,6 +5292,10 @@ static const char *cmd_obj(uint8_t cmd)
case DEVLINK_CMD_PARAM_SET:
case DEVLINK_CMD_PARAM_NEW:
case DEVLINK_CMD_PARAM_DEL:
+ case DEVLINK_CMD_PORT_PARAM_GET:
+ case DEVLINK_CMD_PORT_PARAM_SET:
+ case DEVLINK_CMD_PORT_PARAM_NEW:
+ case DEVLINK_CMD_PORT_PARAM_DEL:
return "param";
case DEVLINK_CMD_REGION_GET:
case DEVLINK_CMD_REGION_SET:
@@ -5176,7 +5438,7 @@ static int cmd_mon_show_cb(const struct nlmsghdr *nlh, void *data)
!tb[DEVLINK_ATTR_PARAM])
return MNL_CB_ERROR;
pr_out_mon_header(genl->cmd);
- pr_out_param(dl, tb, false);
+ pr_out_param(dl, tb, false, false);
pr_out_mon_footer();
break;
case DEVLINK_CMD_REGION_GET: /* fall through */
diff --git a/man/man8/devlink-port.8 b/man/man8/devlink-port.8
index 55f1cce6..563c5833 100644
--- a/man/man8/devlink-port.8
+++ b/man/man8/devlink-port.8
@@ -70,6 +70,23 @@ devlink-port \- devlink port configuration
.BR "state"
.RI "STATE }"

+.ti -8
+.B devlink dev param set
+.I DEV/PORT_INDEX
+.B name
+.I PARAMETER
+.B value
+.I VALUE
+.BR cmode " { " runtime " | " driverinit " | " permanent " } "
+
+.ti -8
+.B devlink dev param show
+[
+.I DEV/PORT_INDEX
+.B name
+.I PARAMETER
+]
+
.ti -8
.B devlink port help

@@ -185,6 +202,44 @@ port type is Ethernet.
.B "DEV/PORT_INDEX"
- specifies the devlink port to delete.

+.ti -8
+.SS devlink port param set - set new value to devlink port configuration parameter
+.PP
+.B "DEV/PORT_INDEX"
+- specifies the devlink port to operate on.
+
+.TP
+.BI name " PARAMETER"
+Specify parameter name to set.
+
+.TP
+.BI value " VALUE"
+New value to set.
+
+.TP
+.BR cmode " { " runtime " | " driverinit " | " permanent " } "
+Configuration mode in which the new value is set.
+
+.I runtime
+- Set new value while driver is running. This configuration mode doesn't require any reset to apply the new value.
+
+.I driverinit
+- Set new value which will be applied during driver initialization. This configuration mode requires restart driver by devlink reload command to apply the new value.
+
+.I permanent
+- New value is written to device's non-volatile memory. This configuration mode requires hard reset to apply the new value.
+
+.SS devlink port param show - display devlink port supported configuration parameters attributes
+
+.PP
+.B "DEV/PORT_INDEX"
+- specifies the devlink port to operate on.
+
+.B name
+.I PARAMETER
+Specify parameter name to show.
+If this argument, as well as port index, are omitted - all parameters supported by devlink device ports are listed.
+
.SH "EXAMPLES"
.PP
devlink port show
@@ -262,6 +317,16 @@ Configure hardware address and also active the function. When a function is
activated together with other configuration in a single command, all the
configuration is applied first before changing the state to active.
.RE
+.PP
+devlink dev param show
+.RS 4
+Shows (dumps) all the port parameters across all the devices registered in the devlink.
+.RE
+.PP
+devlink dev param set pci/0000:01:00.0/1 name internal_error_reset value true cmode runtime
+.RS 4
+Sets the parameter internal_error_reset of specified devlink port (#1) to true.
+.RE

.SH SEE ALSO
.BR devlink (8),
--
2.17.1
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