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| author | Chuck Lever <chuck.lever@oracle.com> | 2022-03-27 16:42:20 -0400 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2022-05-23 11:06:29 -0400 |
| commit | 0122e882119ddbd9efa6edfeeac3f5c704a7aeea (patch) | |
| tree | 513311503e752b21d4da8b3721c14097780a0069 /fs | |
| parent | 7e2ce0cc15a509b859199235a2bad9cece00f67a (diff) | |
| download | linux-stable-0122e882119ddbd9efa6edfeeac3f5c704a7aeea.tar.gz linux-stable-0122e882119ddbd9efa6edfeeac3f5c704a7aeea.tar.bz2 linux-stable-0122e882119ddbd9efa6edfeeac3f5c704a7aeea.zip | |
NFSD: Trace filecache opens
Instrument calls to nfsd_open_verified() to get a sense of the
filecache hit rate.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/filecache.c | 5 | ||||
| -rw-r--r-- | fs/nfsd/trace.h | 28 |
2 files changed, 31 insertions, 2 deletions
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 24772f246461..a7e3a443a2cb 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -995,10 +995,11 @@ open_file: 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; diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index 242fa123e0e9..feb6e6f834b6 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -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), |