NFSD: No longer record nf_hashval in the trace log

I'm about to replace nfsd_file_hashtbl with an rhashtable. The
individual hash values will no longer be visible or relevant, so
remove them from the tracepoints.

Reviewed-by: Jeff Layton <[email protected]>
Signed-off-by: Chuck Lever <[email protected]>

Author: chucklever

fs/nfsd/filecache.c

@@ -589,7 +589,7 @@ nfsd_file_close_inode_sync(struct inode *inode)
 	LIST_HEAD(dispose);
 
 	__nfsd_file_close_inode(inode, hashval, &dispose);
-	trace_nfsd_file_close_inode_sync(inode, hashval, !list_empty(&dispose));
+	trace_nfsd_file_close_inode_sync(inode, !list_empty(&dispose));
 	nfsd_file_dispose_list_sync(&dispose);
 }
 
@@ -609,7 +609,7 @@ nfsd_file_close_inode(struct inode *inode)
 	LIST_HEAD(dispose);
 
 	__nfsd_file_close_inode(inode, hashval, &dispose);
-	trace_nfsd_file_close_inode(inode, hashval, !list_empty(&dispose));
+	trace_nfsd_file_close_inode(inode, !list_empty(&dispose));
 	nfsd_file_dispose_list_delayed(&dispose);
 }
 
@@ -963,7 +963,7 @@ nfsd_file_is_cached(struct inode *inode)
 		}
 	}
 	rcu_read_unlock();
-	trace_nfsd_file_is_cached(inode, hashval, (int)ret);
+	trace_nfsd_file_is_cached(inode, (int)ret);
 	return ret;
 }
 
@@ -995,9 +995,8 @@ nfsd_do_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
 
 	new = nfsd_file_alloc(inode, may_flags, hashval, net);
 	if (!new) {
-		trace_nfsd_file_acquire(rqstp, hashval, inode, may_flags,
-					NULL, nfserr_jukebox);
-		return nfserr_jukebox;
+		status = nfserr_jukebox;
+		goto out_status;
 	}
 
 	spin_lock(&nfsd_file_hashtbl[hashval].nfb_lock);
@@ -1035,8 +1034,10 @@ nfsd_do_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
 		nf = NULL;
 	}
 
-	trace_nfsd_file_acquire(rqstp, hashval, inode, may_flags, nf, status);
+out_status:
+	trace_nfsd_file_acquire(rqstp, inode, may_flags, nf, status);
 	return status;
+
 open_file:
 	nf = new;
 	/* Take reference for the hashtable */

fs/nfsd/trace.h

@@ -748,23 +748,20 @@ DECLARE_EVENT_CLASS(nfsd_file_class,
 	TP_PROTO(struct nfsd_file *nf),
 	TP_ARGS(nf),
 	TP_STRUCT__entry(
-		__field(unsigned int, nf_hashval)
 		__field(void *, nf_inode)
 		__field(int, nf_ref)
 		__field(unsigned long, nf_flags)
 		__field(unsigned char, nf_may)
 		__field(struct file *, nf_file)
 	),
 	TP_fast_assign(
-		__entry->nf_hashval = nf->nf_hashval;
 		__entry->nf_inode = nf->nf_inode;
 		__entry->nf_ref = refcount_read(&nf->nf_ref);
 		__entry->nf_flags = nf->nf_flags;
 		__entry->nf_may = nf->nf_may;
 		__entry->nf_file = nf->nf_file;
 	),
-	TP_printk("hash=0x%x inode=%p ref=%d flags=%s may=%s file=%p",
-		__entry->nf_hashval,
+	TP_printk("inode=%p ref=%d flags=%s may=%s nf_file=%p",
 		__entry->nf_inode,
 		__entry->nf_ref,
 		show_nf_flags(__entry->nf_flags),
@@ -784,15 +781,18 @@ DEFINE_NFSD_FILE_EVENT(nfsd_file_put);
 DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash_and_release_locked);
 
 TRACE_EVENT(nfsd_file_acquire,
-	TP_PROTO(struct svc_rqst *rqstp, unsigned int hash,
-		 struct inode *inode, unsigned int may_flags,
-		 struct nfsd_file *nf, __be32 status),
+	TP_PROTO(
+		struct svc_rqst *rqstp,
+		struct inode *inode,
+		unsigned int may_flags,
+		struct nfsd_file *nf,
+		__be32 status
+	),
 
-	TP_ARGS(rqstp, hash, inode, may_flags, nf, status),
+	TP_ARGS(rqstp, inode, may_flags, nf, status),
 
 	TP_STRUCT__entry(
 		__field(u32, xid)
-		__field(unsigned int, hash)
 		__field(void *, inode)
 		__field(unsigned long, may_flags)
 		__field(int, nf_ref)
@@ -804,7 +804,6 @@ TRACE_EVENT(nfsd_file_acquire,
 
 	TP_fast_assign(
 		__entry->xid = be32_to_cpu(rqstp->rq_xid);
-		__entry->hash = hash;
 		__entry->inode = inode;
 		__entry->may_flags = may_flags;
 		__entry->nf_ref = nf ? refcount_read(&nf->nf_ref) : 0;
@@ -814,8 +813,8 @@ TRACE_EVENT(nfsd_file_acquire,
 		__entry->status = be32_to_cpu(status);
 	),
 
-	TP_printk("xid=0x%x hash=0x%x inode=%p may_flags=%s ref=%d nf_flags=%s nf_may=%s nf_file=%p status=%u",
-			__entry->xid, __entry->hash, __entry->inode,
+	TP_printk("xid=0x%x inode=%p may_flags=%s ref=%d 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),
@@ -826,23 +825,20 @@ TRACE_EVENT(nfsd_file_open,
 	TP_PROTO(struct nfsd_file *nf, __be32 status),
 	TP_ARGS(nf, status),
 	TP_STRUCT__entry(
-		__field(unsigned int, nf_hashval)
 		__field(void *, nf_inode)	/* cannot be dereferenced */
 		__field(int, nf_ref)
 		__field(unsigned long, nf_flags)
 		__field(unsigned long, nf_may)
 		__field(void *, nf_file)	/* cannot be dereferenced */
 	),
 	TP_fast_assign(
-		__entry->nf_hashval = nf->nf_hashval;
 		__entry->nf_inode = nf->nf_inode;
 		__entry->nf_ref = refcount_read(&nf->nf_ref);
 		__entry->nf_flags = nf->nf_flags;
 		__entry->nf_may = nf->nf_may;
 		__entry->nf_file = nf->nf_file;
 	),
-	TP_printk("hash=0x%x inode=%p ref=%d flags=%s may=%s file=%p",
-		__entry->nf_hashval,
+	TP_printk("inode=%p ref=%d flags=%s may=%s file=%p",
 		__entry->nf_inode,
 		__entry->nf_ref,
 		show_nf_flags(__entry->nf_flags),
@@ -851,26 +847,27 @@ TRACE_EVENT(nfsd_file_open,
 )
 
 DECLARE_EVENT_CLASS(nfsd_file_search_class,
-	TP_PROTO(struct inode *inode, unsigned int hash, int found),
-	TP_ARGS(inode, hash, found),
+	TP_PROTO(
+		struct inode *inode,
+		int found
+	),
+	TP_ARGS(inode, found),
 	TP_STRUCT__entry(
 		__field(struct inode *, inode)
-		__field(unsigned int, hash)
 		__field(int, found)
 	),
 	TP_fast_assign(
 		__entry->inode = inode;
-		__entry->hash = hash;
 		__entry->found = found;
 	),
-	TP_printk("hash=0x%x inode=%p found=%d", __entry->hash,
-			__entry->inode, __entry->found)
+	TP_printk("inode=%p found=%d",
+		__entry->inode, __entry->found)
 );
 
 #define DEFINE_NFSD_FILE_SEARCH_EVENT(name)				\
 DEFINE_EVENT(nfsd_file_search_class, name,				\
-	TP_PROTO(struct inode *inode, unsigned int hash, int found),	\
-	TP_ARGS(inode, hash, found))
+	TP_PROTO(struct inode *inode, int found),			\
+	TP_ARGS(inode, found))
 
 DEFINE_NFSD_FILE_SEARCH_EVENT(nfsd_file_close_inode_sync);
 DEFINE_NFSD_FILE_SEARCH_EVENT(nfsd_file_close_inode);