mount: name the disk without changing what is mounted (#11114)

mount: name the disk after the mount point when the whole tree is mounted

The mounted path was the only thing that named the disk, so a mount of the
whole tree was labelled with the filer address and the only way to give it
a name was to mount a subtree under that name — which hides everything
outside it. Fall back to the mount point's own name first, so
-dir=\\seaweedfs\Images labels the disk while -filer.path stays "/".

Claude-Session: https://claude.ai/code/session_01Q9f8pWBXu1ceJvcQfYRQ7x

weed/command/mount.go

@@ -201,7 +201,9 @@ var cmdMount = &Command{
 
   Where the platform labels the disk, in Finder and in Explorer, the mounted
   path names it: -filer.path="/Image Disk" shows up as "Image Disk". Mounting
-  the whole tree labels it with the filer address instead.
+  the whole tree takes the name from the mount point instead, so
+  -dir=\\seaweedfs\Images labels the disk "Images" while still mounting
+  everything, and only a bare drive letter falls back to the filer address.
 
   RDMA Acceleration:
   For ultra-fast reads, enable RDMA acceleration with an RDMA sidecar:

weed/command/mount_common.go

@@ -285,12 +285,25 @@ func resolveCacheDirs(option *MountOptions) (string, string) {
 }
 
 // volumeName labels the mount where the platform shows one, in Finder and in
-// Explorer. The mounted path names the disk; the filer address, which every
-// mount from one filer shares, is only the whole-tree fallback.
-func volumeName(filer, filerMountRootPath string) string {
-	name := path.Base(filerMountRootPath)
-	if name == "/" || name == "." {
+// Explorer. The mounted path names the disk, then the mount point; the filer
+// address, which every mount from one filer shares, is the last resort.
+func volumeName(filer, filerMountRootPath, dir string) string {
+	name := lastSegment(filerMountRootPath)
+	if name == "" {
+		name = lastSegment(dir)
+	}
+	if name == "" {
 		name = filer
 	}
 	return strings.ReplaceAll(name, ",", "+")
 }
+
+// lastSegment is the name a path ends with, and "" for the ones that name no
+// disk: the root, "." and a bare Windows drive letter.
+func lastSegment(p string) string {
+	name := path.Base(strings.ReplaceAll(p, `\`, "/"))
+	if name == "/" || name == "." || strings.HasSuffix(name, ":") {
+		return ""
+	}
+	return name
+}

weed/command/mount_common_test.go

@@ -9,12 +9,14 @@ func Test_volumeName(t *testing.T) {
 		name               string
 		filer              string
 		filerMountRootPath string
+		dir                string
 		expected           string
 	}{
 		{
-			name:               "whole tree falls back to the filer",
+			name:               "a drive letter leaves only the filer to fall back on",
 			filer:              "127.0.0.1:8888",
 			filerMountRootPath: "/",
+			dir:                "S:",
 			expected:           "127.0.0.1:8888",
 		},
 		{
@@ -29,6 +31,34 @@ func Test_volumeName(t *testing.T) {
 			filerMountRootPath: "/",
 			expected:           "127.0.0.1:8888+127.0.0.1:8889",
 		},
+		{
+			name:               "a whole-tree mount takes the name of its network share",
+			filer:              "127.0.0.1:8888",
+			filerMountRootPath: "/",
+			dir:                `\\seaweedfs\Images`,
+			expected:           "Images",
+		},
+		{
+			name:               "a whole-tree mount takes the name of its directory",
+			filer:              "127.0.0.1:8888",
+			filerMountRootPath: "/",
+			dir:                "/mnt/seaweedfs",
+			expected:           "seaweedfs",
+		},
+		{
+			name:               "the mounted path outranks the mount point",
+			filer:              "127.0.0.1:8888",
+			filerMountRootPath: "/buckets/videos",
+			dir:                "/mnt/seaweedfs",
+			expected:           "videos",
+		},
+		{
+			name:               "a relative mount point is not a name",
+			filer:              "127.0.0.1:8888",
+			filerMountRootPath: "/",
+			dir:                ".",
+			expected:           "127.0.0.1:8888",
+		},
 		{
 			name:               "mounted directory names the disk",
 			filer:              "127.0.0.1:8888",
@@ -50,8 +80,8 @@ func Test_volumeName(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			if got := volumeName(tt.filer, tt.filerMountRootPath); got != tt.expected {
-				t.Errorf("volumeName(%q, %q) = %q, want %q", tt.filer, tt.filerMountRootPath, got, tt.expected)
+			if got := volumeName(tt.filer, tt.filerMountRootPath, tt.dir); got != tt.expected {
+				t.Errorf("volumeName(%q, %q, %q) = %q, want %q", tt.filer, tt.filerMountRootPath, tt.dir, got, tt.expected)
 			}
 		})
 	}

weed/command/mount_std.go

@@ -179,7 +179,7 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 			fuseMountOptions.Options = append(fuseMountOptions.Options, "novncache")
 		}
 		fuseMountOptions.Options = append(fuseMountOptions.Options, "slow_statfs")
-		fuseMountOptions.Options = append(fuseMountOptions.Options, "volname="+volumeName(*option.filer, filerMountRootPath))
+		fuseMountOptions.Options = append(fuseMountOptions.Options, "volname="+volumeName(*option.filer, filerMountRootPath, dir))
 		fuseMountOptions.Options = append(fuseMountOptions.Options, fmt.Sprintf("iosize=%d", ioSizeMB*1024*1024))
 	}
 	// Last, so an option given on the command line wins over the default

weed/command/mount_windows.go

@@ -104,7 +104,7 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 	}
 
 	host := winfsp.New(seaweedFileSystem, winfsp.Options{
-		VolumeName:   volumeName(*option.filer, *option.filerMountRootPath),
+		VolumeName:   volumeName(*option.filer, *option.filerMountRootPath, dir),
 		Uid:          ownedByMounter,
 		Gid:          ownedByMounter,
 		CacheTimeout: windowsCacheTimeout,