diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2021-03-05 13:57:40 -0500 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2021-03-22 10:19:02 -0400 |
| commit | 6019ce0742ca55d3e45279a19b07d1542747a098 (patch) | |
| tree | 1bfa8501f958f76303121895bf0d62cfd27dc798 /fs/nfsd/trace.h | |
| parent | 1416f435303d81070c6bcf5a4a9b4ed0f7a9f013 (diff) | |
| download | lwn-6019ce0742ca55d3e45279a19b07d1542747a098.tar.gz lwn-6019ce0742ca55d3e45279a19b07d1542747a098.zip | |
NFSD: Add a tracepoint to record directory entry encoding
Enable watching the progress of directory encoding to capture the
timing of any issues with reading or encoding a directory. The
new tracepoint captures dirent encoding for all NFS versions.
For example, here's what a few NFSv4 directory entries might look
like:
nfsd-989 [002] 468.596265: nfsd_dirent: fh_hash=0x5d162594 ino=2 name=.
nfsd-989 [002] 468.596267: nfsd_dirent: fh_hash=0x5d162594 ino=1 name=..
nfsd-989 [002] 468.596299: nfsd_dirent: fh_hash=0x5d162594 ino=3827 name=zlib.c
nfsd-989 [002] 468.596325: nfsd_dirent: fh_hash=0x5d162594 ino=3811 name=xdiff
nfsd-989 [002] 468.596351: nfsd_dirent: fh_hash=0x5d162594 ino=3810 name=xdiff-interface.h
nfsd-989 [002] 468.596377: nfsd_dirent: fh_hash=0x5d162594 ino=3809 name=xdiff-interface.c
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfsd/trace.h')
| -rw-r--r-- | fs/nfsd/trace.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index 92a0973dd671..27a93ebd1d80 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -391,6 +391,30 @@ DEFINE_EVENT(nfsd_err_class, nfsd_##name, \ DEFINE_NFSD_ERR_EVENT(read_err); DEFINE_NFSD_ERR_EVENT(write_err); +TRACE_EVENT(nfsd_dirent, + TP_PROTO(struct svc_fh *fhp, + u64 ino, + const char *name, + int namlen), + TP_ARGS(fhp, ino, name, namlen), + TP_STRUCT__entry( + __field(u32, fh_hash) + __field(u64, ino) + __field(int, len) + __dynamic_array(unsigned char, name, namlen) + ), + TP_fast_assign( + __entry->fh_hash = fhp ? knfsd_fh_hash(&fhp->fh_handle) : 0; + __entry->ino = ino; + __entry->len = namlen; + memcpy(__get_str(name), name, namlen); + __assign_str(name, name); + ), + TP_printk("fh_hash=0x%08x ino=%llu name=%.*s", + __entry->fh_hash, __entry->ino, + __entry->len, __get_str(name)) +) + #include "state.h" #include "filecache.h" #include "vfs.h" |