Add a tracepoint for obtaining root filehandle event
Signed-off-by: Chen Hanxiao <chenhx.fnst@xxxxxxxxxxx>
---
fs/nfsd/export.c | 4 +---
fs/nfsd/trace.h | 39 +++++++++++++++++++++++++++++++++++++++
2 files changed, 40 insertions(+), 3 deletions(-)
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 7b641095a665..690721ba42f3 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1027,15 +1027,13 @@ exp_rootfh(struct net *net, struct auth_domain *clp, char *name,
}
inode = d_inode(path.dentry);
- dprintk("nfsd: exp_rootfh(%s [%p] %s:%s/%ld)\n",
- name, path.dentry, clp->name,
- inode->i_sb->s_id, inode->i_ino);
exp = exp_parent(cd, clp, &path);
if (IS_ERR(exp)) {
err = PTR_ERR(exp);
goto out;
}
+ trace_nfsd_exp_rootfh(name, path.dentry, clp->name, inode, exp);
/*
* fh must be initialized before calling fh_compose
*/
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 1cd2076210b1..a11b348f5d6d 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -396,6 +396,45 @@ TRACE_EVENT(nfsd_export_update,
)
);
+TRACE_EVENT(nfsd_exp_rootfh,
+ TP_PROTO(
+ const char *name,
+ const struct dentry *dentry,
+ const char *clp_name,
+ const struct inode *inode,
+ struct svc_export *exp
+ ),
+ TP_ARGS(name, dentry, clp_name, inode, exp),
+ TP_STRUCT__entry(
+ __string(name, name)
+ __field(const void *, dentry)
+ __string(clp_name, clp_name)
+ __string(s_id, inode->i_sb->s_id)
+ __field(unsigned long, i_ino)
+ __array(unsigned char, uuid, 16)
+ __field(const void *, ex_uuid)
+ ),
+ TP_fast_assign(
+ __assign_str(name, name);
+ __entry->dentry = dentry;
+ __assign_str(clp_name, clp_name);
+ __assign_str(s_id, inode->i_sb->s_id);
+ __entry->i_ino = inode->i_ino;
+ __entry->ex_uuid = exp->ex_uuid;
+ if (exp->ex_uuid)
+ memcpy(__entry->uuid, exp->ex_uuid, 16);
+ ),
+ TP_printk(
+ "path=%s dentry=%p domain=%s sid=%s/inode=%ld uuid=%s",
+ __get_str(name),
+ __entry->dentry,
+ __get_str(clp_name),
+ __get_str(s_id),
+ __entry->i_ino,
+ __entry->ex_uuid ? __print_hex_str(__entry->uuid, 16) : "NULL"
+ )
+);
+
DECLARE_EVENT_CLASS(nfsd_io_class,
TP_PROTO(struct svc_rqst *rqstp,
struct svc_fh *fhp,
--
2.39.1
