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fs: dlm: add plock dev tracepoints 

I currently debug nfs plock handling and introduce those two tracepoints
for getting more information about what is happening there if the user
space reads plock operations from kernel and writing the result back.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Alexander Aring 2023-08-01 14:09:42 -04:00 committed by David Teigland
parent 67b5da9a40
commit 8c95006d55
2 changed files with 57 additions and 0 deletions
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6
fs/dlm/plock.c
View File

@ -11,6 +11,8 @@
#include <linux/dlm_plock.h>
#include <linux/slab.h>
#include <trace/events/dlm.h>
#include "dlm_internal.h"
#include "lockspace.h"
@ -509,6 +511,8 @@ static ssize_t dev_read(struct file *file, char __user *u, size_t count,
if (!op)
return -EAGAIN;
trace_dlm_plock_read(&info);
/* there is no need to get a reply from userspace for unlocks
that were generated by the vfs cleaning up for a close
(the process did not make an unlock call). */
@ -536,6 +540,8 @@ static ssize_t dev_write(struct file *file, const char __user *u, size_t count,
if (copy_from_user(&info, u, sizeof(info)))
return -EFAULT;
trace_dlm_plock_write(&info);
if (check_version(&info))
return -EINVAL;

51
include/trace/events/dlm.h
View File

@ -7,6 +7,7 @@
#include <linux/dlm.h>
#include <linux/dlmconstants.h>
#include <uapi/linux/dlm_plock.h>
#include <linux/tracepoint.h>
#include "../../../fs/dlm/dlm_internal.h"
@ -585,6 +586,56 @@ TRACE_EVENT(dlm_recv_message,
);
DECLARE_EVENT_CLASS(dlm_plock_template,
TP_PROTO(const struct dlm_plock_info *info),
TP_ARGS(info),
TP_STRUCT__entry(
__field(uint8_t, optype)
__field(uint8_t, ex)
__field(uint8_t, wait)
__field(uint8_t, flags)
__field(uint32_t, pid)
__field(int32_t, nodeid)
__field(int32_t, rv)
__field(uint32_t, fsid)
__field(uint64_t, number)
__field(uint64_t, start)
__field(uint64_t, end)
__field(uint64_t, owner)
),
TP_fast_assign(
__entry->optype = info->optype;
__entry->ex = info->ex;
__entry->wait = info->wait;
__entry->flags = info->flags;
__entry->pid = info->pid;
__entry->nodeid = info->nodeid;
__entry->rv = info->rv;
__entry->fsid = info->fsid;
__entry->number = info->number;
__entry->start = info->start;
__entry->end = info->end;
__entry->owner = info->owner;
),
TP_printk("fsid=%u number=%llx owner=%llx optype=%d ex=%d wait=%d flags=%x pid=%u nodeid=%d rv=%d start=%llx end=%llx",
__entry->fsid, __entry->number, __entry->owner,
__entry->optype, __entry->ex, __entry->wait,
__entry->flags, __entry->pid, __entry->nodeid,
__entry->rv, __entry->start, __entry->end)
);
DEFINE_EVENT(dlm_plock_template, dlm_plock_read,
TP_PROTO(const struct dlm_plock_info *info), TP_ARGS(info));
DEFINE_EVENT(dlm_plock_template, dlm_plock_write,
TP_PROTO(const struct dlm_plock_info *info), TP_ARGS(info));
TRACE_EVENT(dlm_send,
TP_PROTO(int nodeid, int ret),