Commit 0122e882 authored by Chuck Lever's avatar Chuck Lever
Browse files

NFSD: Trace filecache opens 



Instrument calls to nfsd_open_verified() to get a sense of the
filecache hit rate.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent 7e2ce0cc

fs/nfsd/filecache.c

+3 −2
Original line number Diff line number Diff line
@@ -995,10 +995,11 @@ nfsd_do_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp, 


	nf->nf_mark = nfsd_file_mark_find_or_create(nf);

	if (nf->nf_mark) {

		if (open)

		if (open) {

			status = nfsd_open_verified(rqstp, fhp, may_flags,

						    &nf->nf_file);

		else

			trace_nfsd_file_open(nf, status);

		} else

			status = nfs_ok;

	} else

		status = nfserr_jukebox;

fs/nfsd/trace.h

+28 −0
Original line number Diff line number Diff line
@@ -784,6 +784,34 @@ TRACE_EVENT(nfsd_file_acquire, 
			__entry->nf_file, __entry->status)

);



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,

		__entry->nf_inode,

		__entry->nf_ref,

		show_nf_flags(__entry->nf_flags),

		show_nfsd_may_flags(__entry->nf_may),

		__entry->nf_file)

)



DECLARE_EVENT_CLASS(nfsd_file_search_class,

	TP_PROTO(struct inode *inode, unsigned int hash, int found),

	TP_ARGS(inode, hash, found),