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Commit 1f2d30b5 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4: Add tracepoints for debugging the idmapper 



Add tracepoints to help debug uid/gid mappings to username/group.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent ca8acf8d

fs/nfs/idmap.c

+5 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ 


#include "internal.h"

#include "netns.h"

#include "nfs4trace.h"



#define NFS_UINT_MAXLEN 11
@@ -849,6 +850,7 @@ int nfs_map_name_to_uid(const struct nfs_server *server, const char *name, size_ 
		if (!uid_valid(*uid))

			ret = -ERANGE;

	}

	trace_nfs4_map_name_to_uid(name, namelen, id, ret);

	return ret;

}
@@ -865,6 +867,7 @@ int nfs_map_group_to_gid(const struct nfs_server *server, const char *name, size 
		if (!gid_valid(*gid))

			ret = -ERANGE;

	}

	trace_nfs4_map_group_to_gid(name, namelen, id, ret);

	return ret;

}
@@ -879,6 +882,7 @@ int nfs_map_uid_to_name(const struct nfs_server *server, kuid_t uid, char *buf, 
		ret = nfs_idmap_lookup_name(id, "user", buf, buflen, idmap);

	if (ret < 0)

		ret = nfs_map_numeric_to_string(id, buf, buflen);

	trace_nfs4_map_uid_to_name(buf, ret, id, ret);

	return ret;

}

int nfs_map_gid_to_group(const struct nfs_server *server, kgid_t gid, char *buf, size_t buflen)
@@ -892,5 +896,6 @@ int nfs_map_gid_to_group(const struct nfs_server *server, kgid_t gid, char *buf, 
		ret = nfs_idmap_lookup_name(id, "group", buf, buflen, idmap);

	if (ret < 0)

		ret = nfs_map_numeric_to_string(id, buf, buflen);

	trace_nfs4_map_gid_to_group(buf, ret, id, ret);

	return ret;

}

fs/nfs/nfs4trace.h

+46 −0
Original line number Diff line number Diff line
@@ -627,6 +627,52 @@ DEFINE_NFS4_INODE_EVENT(nfs4_set_security_label); 
DEFINE_NFS4_INODE_EVENT(nfs4_recall_delegation);

DEFINE_NFS4_INODE_EVENT(nfs4_delegreturn);



DECLARE_EVENT_CLASS(nfs4_idmap_event,

		TP_PROTO(

			const char *name,

			int len,

			u32 id,

			int error

		),



		TP_ARGS(name, len, id, error),



		TP_STRUCT__entry(

			__field(int, error)

			__field(u32, id)

			__dynamic_array(char, name, len > 0 ? len + 1 : 1)

		),



		TP_fast_assign(

			if (len < 0)

				len = 0;

			__entry->error = error < 0 ? error : 0;

			__entry->id = id;

			memcpy(__get_dynamic_array(name), name, len);

			((char *)__get_dynamic_array(name))[len] = 0;

		),



		TP_printk(

			"error=%d id=%u name=%s",

			__entry->error,

			__entry->id,

			__get_str(name)

		)

);

#define DEFINE_NFS4_IDMAP_EVENT(name) \

	DEFINE_EVENT(nfs4_idmap_event, name, \

			TP_PROTO( \

				const char *name, \

				int len, \

				u32 id, \

				int error \

			), \

			TP_ARGS(name, len, id, error))

DEFINE_NFS4_IDMAP_EVENT(nfs4_map_name_to_uid);

DEFINE_NFS4_IDMAP_EVENT(nfs4_map_group_to_gid);

DEFINE_NFS4_IDMAP_EVENT(nfs4_map_uid_to_name);

DEFINE_NFS4_IDMAP_EVENT(nfs4_map_gid_to_group);



#endif /* _TRACE_NFS4_H */



#undef TRACE_INCLUDE_PATH