ls: cannot access foo: No such file or directory
ls: cannot access foo: No such file or directory
ls: cannot access foo: No such file or directory
ls: cannot access foo: No such file or directory
36962337 -rwxrwxrwx 1 u1026 users 0 Nov 11 18:00 foo
36962337 -rwxrwxrwx 1 u1026 users 0 Nov 11 18:00 foo
36962337 -rwxrwxrwx 1 u1026 users 0 Nov 11 18:00 foo
36962337 -rwxrwxrwx 1 u1026 users 0 Nov 11 18:00 foo


u1026@d8min:/mnt/synology/public/tmp/g1$ strace -e lstat -p 8899 -f
Process 8899 attached with 10 threads
2017/11/11 18:12:21 Dispatch 238: LOOKUP, NodeId: 1. names: [foo] 4 bytes
[pid 10539] lstat("/mnt/synology/public/tmp/g1/a/4DZNVle_txclugO7n_FRIg", 0xc4241adbe8) = -1 ENOENT (No such file or directory)
2017/11/11 18:12:21 Serialize 238: LOOKUP code: OK value: {NodeId: 0 Generation=0 EntryValid=1.000 AttrValid=0.000 Attr={M00 SZ=0 L=0 0:0 B0*0 i0:0 A 0.000000000 M 0.000000000 C 0.000000000}}
2017/11/11 18:12:22 Dispatch 239: LOOKUP, NodeId: 1. names: [foo] 4 bytes
[pid  8903] lstat("/mnt/synology/public/tmp/g1/a/Xsy8mhdcIh0u9aiI7-iLiw", {st_mode=S_IFREG|0777, st_size=0, ...}) = 0
2017/11/11 18:12:22 Serialize 239: LOOKUP code: OK value: {NodeId: 3 Generation=4 EntryValid=1.000 AttrValid=1.000 Attr={M0100777 SZ=0 L=1 1026:100 B0*16384 i0:36962337 A 1510419642.457639700 M 1510419642.457639700 C 1510419702.353712800}}


Call Trace:

nodefs/fsops.go   (c *rawBridge) Lookup
	nodefs/fsops.go   (c *FileSystemConnector) internalLookup
		nodefs/inode.go   (n *Inode) GetChild
		pathfs/pathfs.go  (n *pathInode) GetAttr
			pathfs/pathfs.go  (n *pathInode) GetPath
				nodefs/inode.go   (n *Inode) Parent()
			pathfs/loopback.go (fs *loopbackFileSystem) GetAttr

Call Trace 2 (new child):

nodefs/fsops.go   (c *rawBridge) Lookup
	nodefs/fsops.go   (c *FileSystemConnector) internalLookup
		pathfs/pathfs.go  (n *pathInode) Lookup
			pathfs/pathfs.go  (n *pathInode) findChild