bugfix: fix BIG_WRITES doesn't work

if FUSE module doesn't support MAX_PAGES,
BIG_WRITES doesn't work(kernel only submit 4K write requests).
We should set max_write if BIG_WRITES enabled.

Signed-off-by: henry.hj <[email protected]>

Author: henry.hj

src/api/server/sync_io.rs

@@ -633,6 +633,9 @@ impl<F: FileSystem + Sync> Server<F> {
                     time_gran: 1, // nanoseconds
                     ..Default::default()
                 };
+                if enabled.contains(FsOptions::BIG_WRITES) {
+                    out.max_write = MAX_REQ_PAGES as u32 * pagesize() as u32;
+                }
                 if enabled.contains(FsOptions::MAX_PAGES) {
                     out.max_pages = MAX_REQ_PAGES;
                     out.max_write = MAX_REQ_PAGES as u32 * pagesize() as u32; // 1MB