Trace new locations when hitting a referral.
Signed-off-by: Chen Hanxiao <[email protected]>
---
v2:
fix a fat-finger typo
fs/nfs/nfs4namespace.c | 3 +++
fs/nfs/nfs4trace.h | 25 +++++++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 9a98595bb160..fca9fb801bc2 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -24,6 +24,7 @@
#include "nfs4_fs.h"
#include "nfs.h"
#include "dns_resolve.h"
+#include "nfs4trace.h"
#define NFSDBG_FACILITY NFSDBG_VFS
@@ -351,6 +352,8 @@ static int try_location(struct fs_context *fc,
p += ctx->nfs_server.export_path_len;
*p = 0;
+ trace_nfs4_referral_location(ctx->nfs_server.hostname,
+ ctx->nfs_server.export_path);
ret = nfs4_get_referral_tree(fc);
if (ret == 0)
return 0;
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 10985a4b8259..d9e3e6560cb9 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -2604,6 +2604,31 @@ DEFINE_NFS4_XATTR_EVENT(nfs4_setxattr);
DEFINE_NFS4_XATTR_EVENT(nfs4_removexattr);
DEFINE_NFS4_INODE_EVENT(nfs4_listxattr);
+
+TRACE_EVENT(nfs4_referral_location,
+ TP_PROTO(
+ const char *hostname,
+ const char *path
+ ),
+
+ TP_ARGS(hostname, path),
+
+ TP_STRUCT__entry(
+ __string(referral_hostname, hostname)
+ __string(referral_path, path)
+ ),
+
+ TP_fast_assign(
+ __assign_str(referral_hostname, hostname);
+ __assign_str(referral_path, path);
+ ),
+
+ TP_printk(
+ "referral_host=%s referral_path=%s",
+ __get_str(referral_hostname),
+ __get_str(referral_path)
+ )
+);
#endif /* CONFIG_NFS_V4_2 */
#endif /* CONFIG_NFS_V4_1 */
--
2.39.1