[PATCH v2 iproute2-next 08/11] devlink: Add devlink health dump show command

[Aya Levin]

Add devlink dump show command which displays the last saved dump.
Devlink health saves a single dump. If a dump is not already stored
by the devlink for this reporter, devlink generates a new dump. The dump
can be generated automatically when a reporter reports on an
error or manually by user's request.
The dump's output is defined by the reporter. The command uses the
infra structure for flexible format output introduced in previous patch.
Example:
$ devlink health dump show pci/0000:00:09.0 reporter tx

Signed-off-by: Aya Levin <a...@mellanox.com>
Reviewed-by: Moshe Shemesh <mo...@mellanox.com>
Acked-by: Jiri Pirko <j...@mellanox.com>
---
 devlink/devlink.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/devlink/devlink.c b/devlink/devlink.c
index ef6a72f0b04e..627f8e819aa5 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -5942,6 +5942,11 @@ static int cmd_health_object_common(struct dl *dl, 
uint8_t cmd)
        return err;
 }
 
+static int cmd_health_dump_show(struct dl *dl)
+{
+       return cmd_health_object_common(dl, 
DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
+}
+
 static int cmd_health_diagnose(struct dl *dl)
 {
        return cmd_health_object_common(dl, 
DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE);
@@ -6106,6 +6111,7 @@ static void cmd_health_help(void)
        pr_err("Usage: devlink health show [ dev DEV reporter REPORTER_NAME 
]\n");
        pr_err("       devlink health recover DEV reporter REPORTER_NAME\n");
        pr_err("       devlink health diagnose DEV reporter REPORTER_NAME\n");
+       pr_err("       devlink health dump show DEV reporter REPORTER_NAME\n");
 }
 
 static int cmd_health(struct dl *dl)
@@ -6123,6 +6129,12 @@ static int cmd_health(struct dl *dl)
        } else if (dl_argv_match(dl, "diagnose")) {
                dl_arg_inc(dl);
                return cmd_health_diagnose(dl);
+       } else if (dl_argv_match(dl, "dump")) {
+               dl_arg_inc(dl);
+               if (dl_argv_match(dl, "show")) {
+                       dl_arg_inc(dl);
+                       return cmd_health_dump_show(dl);
+               }
        }
 
        pr_err("Command \"%s\" not found\n", dl_argv(dl));
-- 
2.14.1