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| author | Jeff Layton <jlayton@kernel.org> | 2025-05-03 22:59:22 +0300 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2025-05-12 02:48:31 +0300 |
| commit | a5256e687f2fe40c639b4f5b3f17a637eb35e7ab (patch) | |
| tree | 33aa729ebcf672fe2c9376307543a3a504e0f803 | |
| parent | adbdd746e8ba10088ad3efebee1ec278106a1a38 (diff) | |
| download | linux-a5256e687f2fe40c639b4f5b3f17a637eb35e7ab.tar.xz | |
nfsd: add a tracepoint to nfsd_lookup_dentry
Replace the dprintk in nfsd_lookup_dentry() with a trace point.
nfsd_lookup_dentry() is called frequently enough that enabling this
dprintk call site would result in log floods and performance issues.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
| -rw-r--r-- | fs/nfsd/trace.h | 23 | ||||
| -rw-r--r-- | fs/nfsd/vfs.c | 2 |
2 files changed, 24 insertions, 1 deletions
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index b435276a1aaa..661a870d62f5 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -2394,6 +2394,29 @@ TRACE_EVENT(nfsd_vfs_setattr, ) ) +TRACE_EVENT(nfsd_vfs_lookup, + TP_PROTO( + const struct svc_rqst *rqstp, + const struct svc_fh *fhp, + const char *name, + unsigned int len + ), + TP_ARGS(rqstp, fhp, name, len), + TP_STRUCT__entry( + NFSD_TRACE_PROC_CALL_FIELDS(rqstp) + __field(u32, fh_hash) + __string_len(name, name, len) + ), + TP_fast_assign( + NFSD_TRACE_PROC_CALL_ASSIGNMENTS(rqstp); + __entry->fh_hash = knfsd_fh_hash(&fhp->fh_handle); + __assign_str(name); + ), + TP_printk("xid=0x%08x fh_hash=0x%08x name=%s", + __entry->xid, __entry->fh_hash, __get_str(name) + ) +); + #endif /* _NFSD_TRACE_H */ #undef TRACE_INCLUDE_PATH diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 9e0a858d2129..657ba0c2da14 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -246,7 +246,7 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp, struct dentry *dentry; int host_err; - dprintk("nfsd: nfsd_lookup(fh %s, %.*s)\n", SVCFH_fmt(fhp), len,name); + trace_nfsd_vfs_lookup(rqstp, fhp, name, len); dparent = fhp->fh_dentry; exp = exp_get(fhp->fh_export); |