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cmd: net: add a 'net stats' command to dump network statistics

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Add a new option to the 'net' command which can be used to dump network
statistics.

To do this, 3 new callbacks are added to the eth_ops structure:
.get_sset_count(), .get_strings(), .get_stats(). These callbacks
have the same functions as in Linux: to return the number of counters,
the strings which describe those counters and the actual values.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ioana Ciornei 2023-05-23 16:47:47 +03:00 • committed by Peng Fan
parent 22df08d82e
commit c85e96d0d1
2 changed files with 59 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

54
cmd/net.c
View file

@ -13,6 +13,7 @@
#include <bootstage.h>
#include <command.h>
#include <dm.h>
#include <dm/devres.h>
#include <env.h>
#include <image.h>
#include <log.h>
@ -691,8 +692,58 @@ static int do_net_list(struct cmd_tbl *cmdtp, int flag, int argc, char *const ar
return CMD_RET_SUCCESS;
}
static int do_net_stats(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
int nstats, err, i, off;
struct udevice *dev;
u64 *values;
u8 *strings;
if (argc < 2)
return CMD_RET_USAGE;
err = uclass_get_device_by_name(UCLASS_ETH, argv[1], &dev);
if (err) {
printf("Could not find device %s\n", argv[1]);
return CMD_RET_FAILURE;
}
if (!eth_get_ops(dev)->get_sset_count ||
!eth_get_ops(dev)->get_strings ||
!eth_get_ops(dev)->get_stats) {
printf("Driver does not implement stats dump!\n");
return CMD_RET_FAILURE;
}
nstats = eth_get_ops(dev)->get_sset_count(dev);
strings = kcalloc(nstats, ETH_GSTRING_LEN, GFP_KERNEL);
if (!strings)
return CMD_RET_FAILURE;
values = kcalloc(nstats, sizeof(u64), GFP_KERNEL);
if (!values)
goto err_free_strings;
eth_get_ops(dev)->get_strings(dev, strings);
eth_get_ops(dev)->get_stats(dev, values);
off = 0;
for (i = 0; i < nstats; i++) {
printf(" %s: %llu\n", &strings[off], values[i]);
off += ETH_GSTRING_LEN;
};
return CMD_RET_SUCCESS;
err_free_strings:
kfree(strings);
return CMD_RET_FAILURE;
}
static struct cmd_tbl cmd_net[] = {
U_BOOT_CMD_MKENT(list, 1, 0, do_net_list, "", ""),
U_BOOT_CMD_MKENT(stats, 2, 0, do_net_stats, "", ""),
};
static int do_net(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
@ -714,9 +765,10 @@ static int do_net(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
}
U_BOOT_CMD(
net, 2, 1, do_net,
net, 3, 1, do_net,
"NET sub-system",
"list - list available devices\n"
"stats <device> - dump statistics for specified device\n"
);
#if defined(CONFIG_CMD_NCSI)

6
include/net.h
View file

@ -167,6 +167,9 @@ enum eth_recv_flags {
* to the network stack. This function should fill in the
* eth_pdata::enetaddr field - optional
* set_promisc: Enable or Disable promiscuous mode
* get_sset_count: Number of statistics counters
* get_string: Names of the statistic counters
* get_stats: The values of the statistic counters
*/
struct eth_ops {
int (*start)(struct udevice *dev);
@ -178,6 +181,9 @@ struct eth_ops {
int (*write_hwaddr)(struct udevice *dev);
int (*read_rom_hwaddr)(struct udevice *dev);
int (*set_promisc)(struct udevice *dev, bool enable);
int (*get_sset_count)(struct udevice *dev);
void (*get_strings)(struct udevice *dev, u8 *data);
void (*get_stats)(struct udevice *dev, u64 *data);
};
#define eth_get_ops(dev) ((struct eth_ops *)(dev)->driver->ops)