Record permission errors in the trace log. Note that the new trace
event is conditional, so it will only record non-zero return values
from nfsd_permission().
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
fs/nfsd/nfsfh.c | 8 +-------
fs/nfsd/trace.h | 48 +++++++++++++++++++++++++++++++++++++++++++++---
2 files changed, 46 insertions(+), 10 deletions(-)
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index a5b71526cee0..d73434200df9 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -392,13 +392,7 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, int access)
skip_pseudoflavor_check:
/* Finally, check access permissions. */
error = nfsd_permission(rqstp, exp, dentry, access);
-
- if (error) {
- dprintk("fh_verify: %pd2 permission failure, "
- "acc=%x, error=%d\n",
- dentry,
- access, ntohl(error));
- }
+ trace_nfsd_fh_verify_err(rqstp, fhp, type, access, error);
out:
if (error == nfserr_stale)
nfsd_stats_fh_stale_inc(exp);
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 9ebd67d461f9..1b9f5753f336 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -195,7 +195,7 @@ TRACE_EVENT(nfsd_fh_verify,
__sockaddr(client, rqstp->rq_xprt->xpt_remotelen)
__field(u32, xid)
__field(u32, fh_hash)
- __field(void *, inode)
+ __field(const void *, inode)
__field(unsigned long, type)
__field(unsigned long, access)
),
@@ -211,13 +211,55 @@ TRACE_EVENT(nfsd_fh_verify,
__entry->type = type;
__entry->access = access;
),
- TP_printk("xid=0x%08x fh_hash=0x%08x inode=%p type=%s access=%s",
- __entry->xid, __entry->fh_hash, __entry->inode,
+ TP_printk("xid=0x%08x fh_hash=0x%08x type=%s access=%s",
+ __entry->xid, __entry->fh_hash,
show_fs_file_type(__entry->type),
show_nfsd_may_flags(__entry->access)
)
);
+TRACE_EVENT_CONDITION(nfsd_fh_verify_err,
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ const struct svc_fh *fhp,
+ umode_t type,
+ int access,
+ __be32 error
+ ),
+ TP_ARGS(rqstp, fhp, type, access, error),
+ TP_CONDITION(error),
+ TP_STRUCT__entry(
+ __field(unsigned int, netns_ino)
+ __sockaddr(server, rqstp->rq_xprt->xpt_remotelen)
+ __sockaddr(client, rqstp->rq_xprt->xpt_remotelen)
+ __field(u32, xid)
+ __field(u32, fh_hash)
+ __field(const void *, inode)
+ __field(unsigned long, type)
+ __field(unsigned long, access)
+ __field(int, error)
+ ),
+ TP_fast_assign(
+ __entry->netns_ino = SVC_NET(rqstp)->ns.inum;
+ __assign_sockaddr(server, &rqstp->rq_xprt->xpt_local,
+ rqstp->rq_xprt->xpt_locallen);
+ __assign_sockaddr(client, &rqstp->rq_xprt->xpt_remote,
+ rqstp->rq_xprt->xpt_remotelen);
+ __entry->xid = be32_to_cpu(rqstp->rq_xid);
+ __entry->fh_hash = knfsd_fh_hash(&fhp->fh_handle);
+ __entry->inode = d_inode(fhp->fh_dentry);
+ __entry->type = type;
+ __entry->access = access;
+ __entry->error = be32_to_cpu(error);
+ ),
+ TP_printk("xid=0x%08x fh_hash=0x%08x type=%s access=%s error=%d",
+ __entry->xid, __entry->fh_hash,
+ show_fs_file_type(__entry->type),
+ show_nfsd_may_flags(__entry->access),
+ __entry->error
+ )
+);
+
DECLARE_EVENT_CLASS(nfsd_fh_err_class,
TP_PROTO(struct svc_rqst *rqstp,
struct svc_fh *fhp,
