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Date: Tue, 28 Jun 2022 14:08:49 -0400
From: Chuck Lever <chuck.lever@...cle.com>
To: linux-nfs@...r.kernel.org, netdev@...r.kernel.org
Cc: david@...morbit.com, jlayton@...hat.com, tgraf@...g.ch
Subject: [PATCH v2 28/31] NFSD: Separate tracepoints for acquire and create
These tracepoints collect different information: the create case does
not open a file, so there's no nf_file available.
Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
---
fs/nfsd/filecache.c | 9 +++++----
fs/nfsd/nfs4state.c | 1 +
fs/nfsd/trace.h | 54 +++++++++++++++++++++++++++++++++++++++++++--------
3 files changed, 52 insertions(+), 12 deletions(-)
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 392e5b65ac1b..0c7f86e81f4e 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -1047,7 +1047,7 @@ nfsd_file_is_cached(struct inode *inode)
}
static __be32
-nfsd_do_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
+nfsd_file_do_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
unsigned int may_flags, struct nfsd_file **pnf, bool open)
{
struct nfsd_file_lookup_key key = {
@@ -1145,7 +1145,8 @@ nfsd_do_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
}
out_status:
- trace_nfsd_file_acquire(rqstp, key.inode, may_flags, nf, status);
+ if (open)
+ trace_nfsd_file_acquire(rqstp, key.inode, may_flags, nf, status);
return status;
open_file:
@@ -1186,7 +1187,7 @@ __be32
nfsd_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
unsigned int may_flags, struct nfsd_file **pnf)
{
- return nfsd_do_file_acquire(rqstp, fhp, may_flags, pnf, true);
+ return nfsd_file_do_acquire(rqstp, fhp, may_flags, pnf, true);
}
/**
@@ -1203,7 +1204,7 @@ __be32
nfsd_file_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
unsigned int may_flags, struct nfsd_file **pnf)
{
- return nfsd_do_file_acquire(rqstp, fhp, may_flags, pnf, false);
+ return nfsd_file_do_acquire(rqstp, fhp, may_flags, pnf, false);
}
/*
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 9409a0dc1b76..3a05c095dfe5 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5104,6 +5104,7 @@ static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
goto out_put_access;
nf->nf_file = open->op_filp;
open->op_filp = NULL;
+ trace_nfsd_file_create(rqstp, access, nf);
}
spin_lock(&fp->fi_lock);
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 40d264006004..de765c583c62 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -738,10 +738,10 @@ DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash_and_dispose);
TRACE_EVENT(nfsd_file_acquire,
TP_PROTO(
- struct svc_rqst *rqstp,
- struct inode *inode,
+ const struct svc_rqst *rqstp,
+ const struct inode *inode,
unsigned int may_flags,
- struct nfsd_file *nf,
+ const struct nfsd_file *nf,
__be32 status
),
@@ -749,12 +749,12 @@ TRACE_EVENT(nfsd_file_acquire,
TP_STRUCT__entry(
__field(u32, xid)
- __field(void *, inode)
+ __field(const void *, inode)
__field(unsigned long, may_flags)
- __field(int, nf_ref)
+ __field(unsigned int, nf_ref)
__field(unsigned long, nf_flags)
__field(unsigned long, nf_may)
- __field(struct file *, nf_file)
+ __field(const void *, nf_file)
__field(u32, status)
),
@@ -769,12 +769,50 @@ TRACE_EVENT(nfsd_file_acquire,
__entry->status = be32_to_cpu(status);
),
- TP_printk("xid=0x%x inode=%p may_flags=%s ref=%d nf_flags=%s nf_may=%s nf_file=%p status=%u",
+ TP_printk("xid=0x%x inode=%p may_flags=%s ref=%u nf_flags=%s nf_may=%s nf_file=%p status=%u",
__entry->xid, __entry->inode,
show_nfsd_may_flags(__entry->may_flags),
__entry->nf_ref, show_nf_flags(__entry->nf_flags),
show_nfsd_may_flags(__entry->nf_may),
- __entry->nf_file, __entry->status)
+ __entry->nf_file, __entry->status
+ )
+);
+
+TRACE_EVENT(nfsd_file_create,
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ unsigned int may_flags,
+ const struct nfsd_file *nf
+ ),
+
+ TP_ARGS(rqstp, may_flags, nf),
+
+ TP_STRUCT__entry(
+ __field(const void *, nf_inode)
+ __field(const void *, nf_file)
+ __field(unsigned long, may_flags)
+ __field(unsigned long, nf_flags)
+ __field(unsigned long, nf_may)
+ __field(unsigned int, nf_ref)
+ __field(u32, xid)
+ ),
+
+ TP_fast_assign(
+ __entry->nf_inode = nf->nf_inode;
+ __entry->nf_file = nf->nf_file;
+ __entry->may_flags = may_flags;
+ __entry->nf_flags = nf->nf_flags;
+ __entry->nf_may = nf->nf_may;
+ __entry->nf_ref = refcount_read(&nf->nf_ref);
+ __entry->xid = be32_to_cpu(rqstp->rq_xid);
+ ),
+
+ TP_printk("xid=0x%x inode=%p may_flags=%s ref=%u nf_flags=%s nf_may=%s nf_file=%p",
+ __entry->xid, __entry->nf_inode,
+ show_nfsd_may_flags(__entry->may_flags),
+ __entry->nf_ref, show_nf_flags(__entry->nf_flags),
+ show_nfsd_may_flags(__entry->nf_may), __entry->nf_file
+ )
);
TRACE_EVENT(nfsd_file_insert_err,
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