Support Linux file/dir ACL in weed mount (#8233)

* Support Linux file/dir ACL in weed mount #8229

* Update weed/command/mount_std.go

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

weed/command/mount.go

@@ -24,6 +24,7 @@ type MountOptions struct {
 	cacheSizeMBForRead *int64
 	dataCenter         *string
 	allowOthers        *bool
+	defaultPermissions *bool
 	umaskString        *string
 	nonempty           *bool
 	volumeServerAccess *string
@@ -86,6 +87,7 @@ func init() {
 	mountOptions.cacheMetaTtlSec = cmdMount.Flag.Int("cacheMetaTtlSec", 60, "metadata cache validity seconds")
 	mountOptions.dataCenter = cmdMount.Flag.String("dataCenter", "", "prefer to write to the data center")
 	mountOptions.allowOthers = cmdMount.Flag.Bool("allowOthers", true, "allows other users to access the file system")
+	mountOptions.defaultPermissions = cmdMount.Flag.Bool("defaultPermissions", true, "enforce permissions by the operating system")
 	mountOptions.umaskString = cmdMount.Flag.String("umask", "022", "octal umask, e.g., 022, 0111")
 	mountOptions.nonempty = cmdMount.Flag.Bool("nonempty", false, "allows the mounting over a non-empty directory")
 	mountOptions.volumeServerAccess = cmdMount.Flag.String("volumeServerAccess", "direct", "access volume servers by [direct|publicUrl|filerProxy]")

weed/command/mount_std.go

@@ -188,6 +188,9 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 		//SyncRead:                 false, // set to false to enable the FUSE_CAP_ASYNC_READ capability
 		EnableAcl: true,
 	}
+	if *option.defaultPermissions {
+		fuseMountOptions.Options = append(fuseMountOptions.Options, "default_permissions")
+	}
 	if *option.nonempty {
 		fuseMountOptions.Options = append(fuseMountOptions.Options, "nonempty")
 	}
@@ -216,8 +219,12 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 		fuseMountOptions.Options = append(fuseMountOptions.Options, fmt.Sprintf("iosize=%d", ioSizeMB*1024*1024))
 	}
 
-	fuseMountOptions.EnableWriteback = *option.writebackCache
-	fuseMountOptions.EnableAsyncDio = *option.asyncDio
+  if option.writebackCache != nil {
+	  fuseMountOptions.EnableWriteback = *option.writebackCache
+  }
+  if option.asyncDio != nil {
+	  fuseMountOptions.EnableAsyncDio = *option.asyncDio
+  }
 	if option.cacheSymlink != nil && *option.cacheSymlink {
 		fuseMountOptions.EnableSymlinkCaching = true
 	}