5.15-stable review patch. If anyone has any objections, please let me know.
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From: Chuck Lever chuck.lever@oracle.com
[ Upstream commit 051382885552e12541cc0ebf82092be374a9ed2a ]
Capture file handles and how they map to local inodes. In particular, NFSv4 PUTFH uses fh_verify() so we can now observe which file handles are the target of OPEN, LOOKUP, RENAME, and so on.
Signed-off-by: Chuck Lever chuck.lever@oracle.com --- fs/nfsd/nfsfh.c | 5 +++-- fs/nfsd/trace.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 49 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c index c29baa03dfafd..5e2ed4b2a925c 100644 --- a/fs/nfsd/nfsfh.c +++ b/fs/nfsd/nfsfh.c @@ -331,8 +331,6 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, int access) struct dentry *dentry; __be32 error;
- dprintk("nfsd: fh_verify(%s)\n", SVCFH_fmt(fhp)); - if (!fhp->fh_dentry) { error = nfsd_set_fh_dentry(rqstp, fhp); if (error) @@ -340,6 +338,9 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, int access) } dentry = fhp->fh_dentry; exp = fhp->fh_export; + + trace_nfsd_fh_verify(rqstp, fhp, type, access); + /* * We still have to do all these permission checks, even when * fh_dentry is already set: diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index 3cff3ada00a85..593218d8a54d0 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -171,6 +171,52 @@ TRACE_EVENT(nfsd_compound_encode_err, __entry->opnum, __entry->status) );
+#define show_fs_file_type(x) \ + __print_symbolic(x, \ + { S_IFLNK, "LNK" }, \ + { S_IFREG, "REG" }, \ + { S_IFDIR, "DIR" }, \ + { S_IFCHR, "CHR" }, \ + { S_IFBLK, "BLK" }, \ + { S_IFIFO, "FIFO" }, \ + { S_IFSOCK, "SOCK" }) + +TRACE_EVENT(nfsd_fh_verify, + TP_PROTO( + const struct svc_rqst *rqstp, + const struct svc_fh *fhp, + umode_t type, + int access + ), + TP_ARGS(rqstp, fhp, type, access), + 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(void *, inode) + __field(unsigned long, type) + __field(unsigned long, access) + ), + 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; + ), + TP_printk("xid=0x%08x fh_hash=0x%08x inode=%p type=%s access=%s", + __entry->xid, __entry->fh_hash, __entry->inode, + show_fs_file_type(__entry->type), + show_nfsd_may_flags(__entry->access) + ) +);
DECLARE_EVENT_CLASS(nfsd_fh_err_class, TP_PROTO(struct svc_rqst *rqstp,