diff options
Diffstat (limited to 'drivers/net/netconsole.c')
| -rw-r--r-- | drivers/net/netconsole.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c index 5e66a568954f..e3722de08ea9 100644 --- a/drivers/net/netconsole.c +++ b/drivers/net/netconsole.c @@ -125,6 +125,7 @@ enum sysdata_feature { * @extradata_complete: Cached, formatted string of append * @userdata_length: String length of usedata in extradata_complete. * @sysdata_fields: Sysdata features enabled. + * @msgcounter: Message sent counter. * @stats: Packet send stats for the target. Used for debugging. * @enabled: On / off knob to enable / disable target. * Visible from userspace (read-write). @@ -155,6 +156,8 @@ struct netconsole_target { size_t userdata_length; /* bit-wise with sysdata_feature bits */ u32 sysdata_fields; + /* protected by target_list_lock */ + u32 msgcounter; #endif struct netconsole_target_stats stats; bool enabled; @@ -1362,6 +1365,14 @@ static int sysdata_append_release(struct netconsole_target *nt, int offset) init_utsname()->release); } +static int sysdata_append_msgid(struct netconsole_target *nt, int offset) +{ + wrapping_assign_add(nt->msgcounter, 1); + return scnprintf(&nt->extradata_complete[offset], + MAX_EXTRADATA_ENTRY_LEN, " msgid=%u\n", + nt->msgcounter); +} + /* * prepare_extradata - append sysdata at extradata_complete in runtime * @nt: target to send message to @@ -1384,6 +1395,8 @@ static int prepare_extradata(struct netconsole_target *nt) extradata_len += sysdata_append_taskname(nt, extradata_len); if (nt->sysdata_fields & SYSDATA_RELEASE) extradata_len += sysdata_append_release(nt, extradata_len); + if (nt->sysdata_fields & SYSDATA_MSGID) + extradata_len += sysdata_append_msgid(nt, extradata_len); WARN_ON_ONCE(extradata_len > MAX_EXTRADATA_ENTRY_LEN * MAX_EXTRADATA_ITEMS); |