Support filesystems (e.g. ZFS) that don't expose a creation time

olivefs_common/src/messages.rs

@@ -162,8 +162,8 @@ pub struct FileMetadata {
     pub atime: SystemTime,
     /// Time of last modification
     pub mtime: SystemTime,
-    /// Time of last change
-    pub ctime: SystemTime,
+    /// Time of last change. Not all filesystems have this.
+    pub ctime: Option<SystemTime>,
     // /// Time of creation (macOS only)
     // pub crtime: SystemTime,
     /// Kind of file (directory, file, pipe, etc)

olivefs_common/src/messages/messages_fuser.rs

@@ -1,5 +1,6 @@
 use crate::messages::{FileKind, FileMetadata};
 use fuser::{FileAttr, FileType};
+use std::time::SystemTime;
 
 impl From<FileType> for FileKind {
     fn from(filetype: FileType) -> Self {
@@ -37,8 +38,8 @@ impl Into<FileAttr> for FileMetadata {
             blocks: self.blocks,
             atime: self.atime,
             mtime: self.mtime,
-            ctime: self.ctime,
-            crtime: self.ctime,
+            ctime: self.ctime.unwrap_or(SystemTime::UNIX_EPOCH),
+            crtime: self.ctime.unwrap_or(SystemTime::UNIX_EPOCH),
             kind: self.kind.into(),
             perm: self.perm,
             nlink: self.nlink,

olivefsd/src/server/file_access.rs

@@ -240,7 +240,7 @@ impl FileAccess {
             blocks: metadata.blocks(),
             atime: metadata.accessed().unwrap(),
             mtime: metadata.modified().unwrap(),
-            ctime: metadata.created().unwrap(),
+            ctime: metadata.created().ok(),
             kind: metadata.file_type().into(),
             perm: metadata.permissions().mode() as u16,
             nlink: metadata.nlink() as u32,