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NFSv4: Add tracepoints for debugging file locking

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Set up basic tracepoints for debugging NFSv4 file lock/unlock

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-08-12 16:35:20 -04:00
parent 42113a7539
commit d1b748a5e7
2 changed files with 82 additions and 2 deletions
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9
fs/nfs/nfs4proc.c
View file

@ -4964,8 +4964,9 @@ static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(state->inode),
_nfs4_proc_getlk(state, cmd, request),
err = _nfs4_proc_getlk(state, cmd, request);
trace_nfs4_get_lock(request, state, cmd, err);
err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
&exception);
} while (exception.retry);
return err;
@ -5163,6 +5164,7 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *
rpc_put_task(task);
out:
request->fl_flags = fl_flags;
trace_nfs4_unlock(request, state, F_SETLK, status);
return status;
}
@ -5386,6 +5388,7 @@ static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
return 0;
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
if (err != -NFS4ERR_DELAY)
break;
nfs4_handle_exception(server, err, &exception);
@ -5408,6 +5411,7 @@ static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
return 0;
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
trace_nfs4_lock_expired(request, state, F_SETLK, err);
switch (err) {
default:
goto out;
@ -5530,6 +5534,7 @@ static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *
do {
err = _nfs4_proc_setlk(state, cmd, request);
trace_nfs4_set_lock(request, state, cmd, err);
if (err == -NFS4ERR_DENIED)
err = -EAGAIN;
err = nfs4_handle_exception(NFS_SERVER(state->inode),

75
fs/nfs/nfs4trace.h
View file

@ -336,6 +336,81 @@ TRACE_EVENT(nfs4_close,
)
);
#define show_lock_cmd(type) \
__print_symbolic((int)type, \
{ F_GETLK, "GETLK" }, \
{ F_SETLK, "SETLK" }, \
{ F_SETLKW, "SETLKW" })
#define show_lock_type(type) \
__print_symbolic((int)type, \
{ F_RDLCK, "RDLCK" }, \
{ F_WRLCK, "WRLCK" }, \
{ F_UNLCK, "UNLCK" })
DECLARE_EVENT_CLASS(nfs4_lock_event,
TP_PROTO(
const struct file_lock *request,
const struct nfs4_state *state,
int cmd,
int error
),
TP_ARGS(request, state, cmd, error),
TP_STRUCT__entry(
__field(int, error)
__field(int, cmd)
__field(char, type)
__field(loff_t, start)
__field(loff_t, end)
__field(dev_t, dev)
__field(u32, fhandle)
__field(u64, fileid)
),
TP_fast_assign(
const struct inode *inode = state->inode;
__entry->error = error;
__entry->cmd = cmd;
__entry->type = request->fl_type;
__entry->start = request->fl_start;
__entry->end = request->fl_end;
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = NFS_FILEID(inode);
__entry->fhandle = nfs_fhandle_hash(NFS_FH(inode));
),
TP_printk(
"error=%d (%s) cmd=%s:%s range=%lld:%lld "
"fileid=%02x:%02x:%llu fhandle=0x%08x",
__entry->error,
show_nfsv4_errors(__entry->error),
show_lock_cmd(__entry->cmd),
show_lock_type(__entry->type),
(long long)__entry->start,
(long long)__entry->end,
MAJOR(__entry->dev), MINOR(__entry->dev),
(unsigned long long)__entry->fileid,
__entry->fhandle
)
);
#define DEFINE_NFS4_LOCK_EVENT(name) \
DEFINE_EVENT(nfs4_lock_event, name, \
TP_PROTO( \
const struct file_lock *request, \
const struct nfs4_state *state, \
int cmd, \
int error \
), \
TP_ARGS(request, state, cmd, error))
DEFINE_NFS4_LOCK_EVENT(nfs4_get_lock);
DEFINE_NFS4_LOCK_EVENT(nfs4_set_lock);
DEFINE_NFS4_LOCK_EVENT(nfs4_lock_reclaim);
DEFINE_NFS4_LOCK_EVENT(nfs4_lock_expired);
DEFINE_NFS4_LOCK_EVENT(nfs4_unlock);
#endif /* _TRACE_NFS4_H */
#undef TRACE_INCLUDE_PATH