feat: Implment std_fs_call kfstatvfs handling to memory scheme

Cargo.lock

@@ -201,9 +201,9 @@ checksum = "64072665120942deff5fd5425d6c1811b854f4939e7f1c01ce755f64432bbea7"
 
 [[package]]
 name = "redox_syscall"
-version = "0.7.2"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d94dd2f7cd932d4dc02cc8b2b50dfd38bd079a4e5d79198b99743d7fcf9a4b4"
+checksum = "6ce70a74e890531977d37e532c34d45e9055d2409ed08ddba14529471ed0be16"
 dependencies = [
  "bitflags 2.10.0",
 ]

Cargo.toml

@@ -15,7 +15,7 @@ bitflags = "2"
 hashbrown = { version = "0.14.3", default-features = false, features = ["ahash", "inline-more"] }
 linked_list_allocator = "0.9.0"
 redox-path = "0.2.0"
-redox_syscall = { version = "0.7.2", default-features = false }
+redox_syscall = { version = "0.7.3", default-features = false }
 rmm = { path = "rmm", default-features = false }
 slab = { version = "0.4", default-features = false }
 spin = { version = "0.9.8" }

src/scheme/memory.rs

@@ -5,7 +5,7 @@ use rmm::PhysicalAddress;
 
 use crate::{
     context::{
-        file::InternalFlags,
+        file::{FileDescription, InternalFlags},
         memory::{handle_notify_files, AddrSpace, AddrSpaceWrapper, Grant, PageSpan},
     },
     memory::{free_frames, used_frames, Frame, PAGE_SIZE},
@@ -19,7 +19,7 @@ use crate::paging::entry::EntryFlags;
 use crate::syscall::{
     data::{Map, StatVfs},
     error::*,
-    flag::MapFlags,
+    flag::{CallFlags, MapFlags},
     usercopy::UserSliceWo,
 };
 
@@ -335,4 +335,32 @@ impl KernelScheme for MemoryScheme {
 
         Ok(())
     }
+    fn kstdfscall(
+        &self,
+        id: usize,
+        _desc: Arc<spin::RwLock<FileDescription>>,
+        payload: UserSliceRw,
+        _flags: CallFlags,
+        metadata: &[u64],
+        token: &mut CleanLockToken,
+    ) -> Result<usize> {
+        use syscall::flag::StdFsCallKind::{self, *};
+        let Some(raw_kind) = metadata.first().map(|v| *v as u8) else {
+            return Err(Error::new(EOPNOTSUPP));
+        };
+        let Some(kind) = StdFsCallKind::try_from_raw(raw_kind) else {
+            return Err(Error::new(EOPNOTSUPP));
+        };
+
+        match kind {
+            Fstatvfs => {
+                if payload.len() != core::mem::size_of::<StatVfs>() {
+                    return Err(Error::new(EINVAL));
+                }
+                self.kfstatvfs(id, UserSliceWo::new(payload.addr(), payload.len())?, token)
+                    .map(|_| 0)
+            }
+            _ => Err(Error::new(EOPNOTSUPP)),
+        }
+    }
 }