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Date: Sun, 28 Aug 2016 16:35:21 +0300
From: Or Gerlitz <ogerlitz@...lanox.com>
To: Stephen Hemminger <stephen@...workplumber.org>,
Jiri Pirko <jiri@...lanox.com>
Cc: netdev@...r.kernel.org, Or Gerlitz <ogerlitz@...lanox.com>,
Roi Dayan <roid@...lanox.com>
Subject: [PATCH net iproute2] devlink: Add e-switch support
Implement kernel devlink e-switch interface. Currently we allow
to get and set the device e-switch mode.
Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
Signed-off-by: Roi Dayan <roid@...lanox.com>
---
Hi Stephen,
The patch is rebased over the net-next branch of iproute2 which has the
4.8 UAPI headers devlink update, but is targeted to 4.8 (net) as the
relevant functionality was merged in 4.8-rc1
Roi && Or.
devlink/devlink.c | 122 +++++++++++++++++++++++++++++++++++++++++++++++++
man/man8/devlink-dev.8 | 34 ++++++++++++++
2 files changed, 156 insertions(+)
diff --git a/devlink/devlink.c b/devlink/devlink.c
index 84fa51e..d69fc6b 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -26,6 +26,9 @@
#include "mnlg.h"
#include "json_writer.h"
+#define ESWITCH_MODE_LEGACY "legacy"
+#define ESWITCH_MODE_SWITCHDEV "switchdev"
+
#define pr_err(args...) fprintf(stderr, ##args)
#define pr_out(args...) fprintf(stdout, ##args)
#define pr_out_sp(num, args...) \
@@ -128,6 +131,7 @@ static void ifname_map_free(struct ifname_map *ifname_map)
#define DL_OPT_SB_THTYPE BIT(8)
#define DL_OPT_SB_TH BIT(9)
#define DL_OPT_SB_TC BIT(10)
+#define DL_OPT_ESWITCH_MODE BIT(11)
struct dl_opts {
uint32_t present; /* flags of present items */
@@ -143,6 +147,7 @@ struct dl_opts {
enum devlink_sb_threshold_type sb_pool_thtype;
uint32_t sb_threshold;
uint16_t sb_tc_index;
+ enum devlink_eswitch_mode eswitch_mode;
};
struct dl {
@@ -297,6 +302,9 @@ static int attr_cb(const struct nlattr *attr, void *data)
if (type == DEVLINK_ATTR_SB_OCC_MAX &&
mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
return MNL_CB_ERROR;
+ if (type == DEVLINK_ATTR_ESWITCH_MODE &&
+ mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
+ return MNL_CB_ERROR;
tb[type] = attr;
return MNL_CB_OK;
}
@@ -661,6 +669,19 @@ static int threshold_type_get(const char *typestr,
return 0;
}
+static int eswitch_mode_get(const char *typestr, enum devlink_eswitch_mode *p_mode)
+{
+ if (strcmp(typestr, ESWITCH_MODE_LEGACY) == 0) {
+ *p_mode = DEVLINK_ESWITCH_MODE_LEGACY;
+ } else if (strcmp(typestr, ESWITCH_MODE_SWITCHDEV) == 0) {
+ *p_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
+ } else {
+ pr_err("Unknown eswitch mode \"%s\"\n", typestr);
+ return -EINVAL;
+ }
+ return 0;
+}
+
static int dl_argv_parse(struct dl *dl, uint32_t o_required,
uint32_t o_optional)
{
@@ -770,6 +791,17 @@ static int dl_argv_parse(struct dl *dl, uint32_t o_required,
if (err)
return err;
o_found |= DL_OPT_SB_TC;
+ } else if (dl_argv_match(dl, "mode") &&
+ (o_all & DL_OPT_ESWITCH_MODE)) {
+ const char *typestr;
+ dl_arg_inc(dl);
+ err = dl_argv_str(dl, &typestr);
+ if (err)
+ return err;
+ err = eswitch_mode_get(typestr, &opts->eswitch_mode);
+ if (err)
+ return err;
+ o_found |= DL_OPT_ESWITCH_MODE;
} else {
pr_err("Unknown option \"%s\"\n", dl_argv(dl));
return -EINVAL;
@@ -823,6 +855,12 @@ static int dl_argv_parse(struct dl *dl, uint32_t o_required,
pr_err("TC index option expected.\n");
return -EINVAL;
}
+
+ if ((o_required & DL_OPT_ESWITCH_MODE) && !(o_found & DL_OPT_ESWITCH_MODE)) {
+ pr_err("E-Switch mode option expected.\n");
+ return -EINVAL;
+ }
+
return 0;
}
@@ -866,6 +904,9 @@ static void dl_opts_put(struct nlmsghdr *nlh, struct dl *dl)
if (opts->present & DL_OPT_SB_TC)
mnl_attr_put_u16(nlh, DEVLINK_ATTR_SB_TC_INDEX,
opts->sb_tc_index);
+ if (opts->present & DL_OPT_ESWITCH_MODE)
+ mnl_attr_put_u16(nlh, DEVLINK_ATTR_ESWITCH_MODE,
+ opts->eswitch_mode);
}
static int dl_argv_parse_put(struct nlmsghdr *nlh, struct dl *dl,
@@ -1149,6 +1190,84 @@ static void pr_out_section_end(struct dl *dl)
}
}
+static const char *eswitch_mode_name(uint32_t mode)
+{
+ switch (mode) {
+ case DEVLINK_ESWITCH_MODE_LEGACY: return ESWITCH_MODE_LEGACY;
+ case DEVLINK_ESWITCH_MODE_SWITCHDEV: return ESWITCH_MODE_SWITCHDEV;
+ default: return "<unknown mode>";
+ }
+}
+
+static void pr_out_eswitch(struct dl *dl, struct nlattr **tb)
+{
+ __pr_out_handle_start(dl, tb, true, false);
+
+ if (tb[DEVLINK_ATTR_ESWITCH_MODE])
+ pr_out_str(dl, "mode",
+ eswitch_mode_name(mnl_attr_get_u16(tb[DEVLINK_ATTR_ESWITCH_MODE])));
+ pr_out_handle_end(dl);
+}
+
+static int cmd_dev_eswitch_show_cb(const struct nlmsghdr *nlh, void *data)
+{
+ struct dl *dl = data;
+ struct nlattr *tb[DEVLINK_ATTR_MAX + 1] = {};
+ struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
+
+ mnl_attr_parse(nlh, sizeof(*genl), attr_cb, tb);
+ if (!tb[DEVLINK_ATTR_BUS_NAME] || !tb[DEVLINK_ATTR_DEV_NAME])
+ return MNL_CB_ERROR;
+ pr_out_eswitch(dl, tb);
+ return MNL_CB_OK;
+}
+
+static int cmd_dev_eswitch_show(struct dl *dl)
+{
+ struct nlmsghdr *nlh;
+ int err;
+
+ nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_ESWITCH_MODE_GET,
+ NLM_F_REQUEST | NLM_F_ACK);
+
+ err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLE, 0);
+ if (err)
+ return err;
+
+ pr_out_section_start(dl, "dev");
+ err = _mnlg_socket_sndrcv(dl->nlg, nlh, cmd_dev_eswitch_show_cb, dl);
+ pr_out_section_end(dl);
+ return err;
+}
+
+static int cmd_dev_eswitch_set(struct dl *dl)
+{
+ struct nlmsghdr *nlh;
+ int err;
+
+ nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_ESWITCH_MODE_SET,
+ NLM_F_REQUEST | NLM_F_ACK);
+
+ err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLE | DL_OPT_ESWITCH_MODE, 0);
+ if (err)
+ return err;
+
+ return _mnlg_socket_sndrcv(dl->nlg, nlh, NULL, NULL);
+}
+
+static int cmd_dev_eswitch(struct dl *dl)
+{
+ if (dl_argv_match(dl, "set")) {
+ dl_arg_inc(dl);
+ return cmd_dev_eswitch_set(dl);
+ } else if (dl_argv_match(dl, "show")) {
+ dl_arg_inc(dl);
+ return cmd_dev_eswitch_show(dl);
+ }
+ pr_err("Command \"%s\" not found\n", dl_argv(dl));
+ return -ENOENT;
+}
+
static int cmd_dev_show_cb(const struct nlmsghdr *nlh, void *data)
{
struct dl *dl = data;
@@ -1194,6 +1313,9 @@ static int cmd_dev(struct dl *dl)
dl_argv_match(dl, "list") || dl_no_arg(dl)) {
dl_arg_inc(dl);
return cmd_dev_show(dl);
+ } else if (dl_argv_match(dl, "eswitch")) {
+ dl_arg_inc(dl);
+ return cmd_dev_eswitch(dl);
}
pr_err("Command \"%s\" not found\n", dl_argv(dl));
return -ENOENT;
diff --git a/man/man8/devlink-dev.8 b/man/man8/devlink-dev.8
index 62bcead..9ce3193 100644
--- a/man/man8/devlink-dev.8
+++ b/man/man8/devlink-dev.8
@@ -25,6 +25,17 @@ devlink-dev \- devlink device configuration
.ti -8
.B devlink dev help
+.ti -8
+.BR "devlink dev eswitch set"
+.IR DEV
+.RI "[ "
+.BR mode " { " legacy " | " switchdev " } "
+.RI "]"
+
+.ti -8
+.BR "devlink dev eswitch show"
+.IR DEV
+
.SH "DESCRIPTION"
.SS devlink dev show - display devlink device attributes
@@ -38,6 +49,19 @@ Format is:
.in +2
BUS_NAME/BUS_ADDRESS
+.SS devlink dev eswitch show - display devlink device eswitch attributes
+.SS devlink dev eswitch set - sets devlink device eswitch attributes
+
+.TP
+.BR mode " { " legacy " | " switchdev " } "
+set eswitch mode
+
+.I legacy
+- Legacy SRIOV
+
+.I switchdev
+- SRIOV switchdev offloads
+
.SH "EXAMPLES"
.PP
devlink dev show
@@ -48,6 +72,16 @@ Shows the state of all devlink devices on the system.
devlink dev show pci/0000:01:00.0
.RS 4
Shows the state of specified devlink device.
+.RE
+.PP
+devlink dev eswitch show pci/0000:01:00.0
+.RS 4
+Shows the eswitch mode of specified devlink device.
+.RE
+.PP
+devlink dev eswitch set pci/0000:01:00.0 mode switchdev
+.RS 4
+Sets the eswitch mode of specified devlink device to switchdev.
.SH SEE ALSO
.BR devlink (8),
--
2.3.7
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