refactor(driver,iour): remove support for kernel < 5.19

.github/workflows/ci_test.yml

@@ -26,11 +26,7 @@ jobs:
           - os: "ubuntu-22.04"
             features: "polling" # fusion
           - os: "ubuntu-22.04"
-            features: "io-uring-sqe128,io-uring-cqe32,io-uring-socket"
-          - os: "ubuntu-22.04"
-            features: "io-uring-buf-ring"
-          - os: "ubuntu-22.04"
-            features: "polling,io-uring-buf-ring" # fusion & buf-ring
+            features: "io-uring-sqe128,io-uring-cqe32"
           - os: "ubuntu-22.04"
             features: "polling,ring"
             no_default_features: true

compio-driver/Cargo.toml

@@ -82,8 +82,6 @@ polling = ["dep:polling"]
 
 io-uring-sqe128 = []
 io-uring-cqe32 = []
-io-uring-socket = []
-io-uring-buf-ring = []
 
 iocp-global = []
 iocp-wait-packet = []

compio-driver/build.rs

@@ -14,7 +14,7 @@ fn main() {
         freebsd: { target_os = "freebsd" },
         solarish: { any(target_os = "illumos", target_os = "solaris") },
         aio: { any(freebsd, solarish) },
-        buf_ring: { all(target_os = "linux", feature = "io-uring", feature = "io-uring-buf-ring") },
+        io_uring: { all(target_os = "linux", feature = "io-uring") },
         fusion: { all(target_os = "linux", feature = "io-uring", feature = "polling") }
     }
 }

compio-driver/src/buffer_pool/mod.rs

@@ -1,5 +1,5 @@
 cfg_if::cfg_if! {
-    if #[cfg(buf_ring)] {
+    if #[cfg(io_uring)] {
         cfg_if::cfg_if! {
             if #[cfg(fusion)] {
                 mod fusion;

compio-driver/src/driver_type.rs

@@ -36,7 +36,7 @@ impl DriverType {
         cfg_if::cfg_if! {
             if #[cfg(windows)] {
                 DriverType::IOCP
-            } else if #[cfg(all(target_os = "linux", feature = "polling", feature = "io-uring"))] {
+            } else if #[cfg(fusion)] {
                 use io_uring::opcode::*;
 
                 // Add more opcodes here if used
@@ -54,13 +54,6 @@ impl DriverType {
                     OpenAt::CODE,
                     Close::CODE,
                     Shutdown::CODE,
-                    // Linux kernel 5.19
-                    #[cfg(any(
-                        feature = "io-uring-sqe128",
-                        feature = "io-uring-cqe32",
-                        feature = "io-uring-socket",
-                        feature = "io-uring-buf-ring"
-                    ))]
                     Socket::CODE,
                 ];
 
@@ -75,7 +68,7 @@ impl DriverType {
                     }
                 })()
                 .unwrap_or(DriverType::Poll) // Should we fail here?
-            } else if #[cfg(all(target_os = "linux", feature = "io-uring"))] {
+            } else if #[cfg(io_uring)] {
                 DriverType::IoUring
             } else if #[cfg(unix)] {
                 DriverType::Poll

compio-driver/src/fusion/op.rs

@@ -103,7 +103,7 @@ op!(<T: IoVectoredBuf, S: AsRawFd> SendToVectored(fd: SharedFd<S>, buffer: T, ad
 op!(<S: AsRawFd> FileStat(fd: SharedFd<S>));
 op!(<> PathStat(path: CString, follow_symlink: bool));
 
-#[cfg(buf_ring)]
+#[cfg(io_uring)]
 macro_rules! mop {
     (<$($ty:ident: $trait:ident),* $(,)?> $name:ident( $($arg:ident: $arg_t:ty),* $(,)? )) => {
         ::paste::paste!{
@@ -198,7 +198,7 @@ macro_rules! mop {
     };
 }
 
-#[cfg(buf_ring)]
+#[cfg(io_uring)]
 mop!(<S: AsRawFd> ReadManagedAt(fd: SharedFd<S>, offset: u64, pool: &BufferPool, len: usize));
-#[cfg(buf_ring)]
+#[cfg(io_uring)]
 mop!(<S: AsRawFd> RecvManaged(fd: SharedFd<S>, pool: &BufferPool, len: usize));

compio-driver/src/iour/mod.rs

@@ -26,7 +26,7 @@ use io_uring::{
     types::{Fd, SubmitArgs, Timespec},
 };
 pub(crate) use libc::{sockaddr_storage, socklen_t};
-#[cfg(buf_ring)]
+#[cfg(io_uring)]
 use slab::Slab;
 
 use crate::{AsyncifyPool, BufferPool, Entry, Key, ProactorBuilder, syscall};
@@ -84,7 +84,7 @@ pub(crate) struct Driver {
     notifier: Notifier,
     pool: AsyncifyPool,
     pool_completed: Arc<SegQueue<Entry>>,
-    #[cfg(buf_ring)]
+    #[cfg(io_uring)]
     buffer_group_ids: Slab<()>,
 }
 
@@ -119,7 +119,7 @@ impl Driver {
             notifier,
             pool: builder.create_or_get_thread_pool(),
             pool_completed: Arc::new(SegQueue::new()),
-            #[cfg(buf_ring)]
+            #[cfg(io_uring)]
             buffer_group_ids: Slab::new(),
         })
     }
@@ -298,7 +298,7 @@ impl Driver {
         self.notifier.handle()
     }
 
-    #[cfg(buf_ring)]
+    #[cfg(io_uring)]
     pub fn create_buffer_pool(
         &mut self,
         buffer_len: u16,
@@ -333,7 +333,7 @@ impl Driver {
         }
     }
 
-    #[cfg(not(buf_ring))]
+    #[cfg(not(io_uring))]
     pub fn create_buffer_pool(
         &mut self,
         buffer_len: u16,
@@ -345,7 +345,7 @@ impl Driver {
     /// # Safety
     ///
     /// caller must make sure release the buffer pool with correct driver
-    #[cfg(buf_ring)]
+    #[cfg(io_uring)]
     pub unsafe fn release_buffer_pool(&mut self, buffer_pool: BufferPool) -> io::Result<()> {
         #[cfg(fusion)]
         let buffer_pool = buffer_pool.into_io_uring();
@@ -360,7 +360,7 @@ impl Driver {
     /// # Safety
     ///
     /// caller must make sure release the buffer pool with correct driver
-    #[cfg(not(buf_ring))]
+    #[cfg(not(io_uring))]
     pub unsafe fn release_buffer_pool(&mut self, _: BufferPool) -> io::Result<()> {
         Ok(())
     }

compio-driver/src/iour/op.rs

@@ -262,13 +262,9 @@ impl OpCode for HardLink {
 
 impl OpCode for CreateSocket {
     fn create_entry(self: Pin<&mut Self>) -> OpEntry {
-        if cfg!(feature = "io-uring-socket") {
-            opcode::Socket::new(self.domain, self.socket_type, self.protocol)
-                .build()
-                .into()
-        } else {
-            OpEntry::Blocking
-        }
+        opcode::Socket::new(self.domain, self.socket_type, self.protocol)
+            .build()
+            .into()
     }
 
     fn call_blocking(self: Pin<&mut Self>) -> io::Result<usize> {
@@ -598,7 +594,7 @@ impl<S: AsRawFd> OpCode for PollOnce<S> {
     }
 }
 
-#[cfg(buf_ring)]
+#[cfg(io_uring)]
 mod buf_ring {
     use std::{io, marker::PhantomPinned, os::fd::AsRawFd, pin::Pin, ptr};
 
@@ -730,10 +726,10 @@ mod buf_ring {
     }
 }
 
-#[cfg(buf_ring)]
+#[cfg(io_uring)]
 pub use buf_ring::{ReadManagedAt, RecvManaged};
 
-#[cfg(not(buf_ring))]
+#[cfg(not(io_uring))]
 mod fallback {
     use std::pin::Pin;
 

compio-driver/src/key.rs

@@ -148,7 +148,7 @@ impl<T: ?Sized> Key<T> {
     /// op should be dropped because it is useless.
     pub(crate) fn set_result(&mut self, res: io::Result<usize>) -> bool {
         let this = unsafe { &mut *self.as_dyn_mut_ptr() };
-        #[cfg(all(target_os = "linux", feature = "io-uring"))]
+        #[cfg(io_uring)]
         if let Ok(res) = res {
             unsafe {
                 Pin::new_unchecked(&mut this.op).set_result(res);

compio-driver/src/lib.rs

@@ -47,10 +47,10 @@ cfg_if::cfg_if! {
     if #[cfg(windows)] {
         #[path = "iocp/mod.rs"]
         mod sys;
-    } else if #[cfg(all(target_os = "linux", feature = "polling", feature = "io-uring"))] {
+    } else if #[cfg(fusion)] {
         #[path = "fusion/mod.rs"]
         mod sys;
-    } else if #[cfg(all(target_os = "linux", feature = "io-uring"))] {
+    } else if #[cfg(io_uring)] {
         #[path = "iour/mod.rs"]
         mod sys;
     } else if #[cfg(unix)] {
@@ -372,7 +372,7 @@ impl Entry {
         }
     }
 
-    #[cfg(all(target_os = "linux", feature = "io-uring"))]
+    #[cfg(io_uring)]
     // this method only used by in io-uring driver
     pub(crate) fn set_flags(&mut self, flags: u32) {
         self.flags = flags;

compio-driver/src/op.rs

@@ -20,7 +20,7 @@ pub use crate::sys::op::{
     CreateDir, CreateSocket, FileStat, HardLink, Interest, OpenFile, PathStat, PollOnce,
     ReadVectoredAt, Rename, Symlink, Unlink, WriteVectoredAt,
 };
-#[cfg(buf_ring)]
+#[cfg(io_uring)]
 pub use crate::sys::op::{ReadManagedAt, RecvManaged};
 use crate::{
     OwnedFd, SharedFd,
@@ -268,7 +268,7 @@ impl<S> Connect<S> {
     }
 }
 
-#[cfg(any(not(buf_ring), fusion))]
+#[cfg(any(not(io_uring), fusion))]
 pub(crate) mod managed {
     use std::io;
 
@@ -290,7 +290,7 @@ pub(crate) mod managed {
             pool: &BufferPool,
             len: usize,
         ) -> io::Result<Self> {
-            #[cfg(all(buf_ring, fusion))]
+            #[cfg(fusion)]
             let pool = pool.as_poll();
             Ok(Self {
                 op: ReadAt::new(fd, offset, pool.get_buffer(len)?),
@@ -309,12 +309,12 @@ pub(crate) mod managed {
             _: u32,
         ) -> io::Result<BorrowedBuffer> {
             let result = result?;
-            #[cfg(all(buf_ring, fusion))]
+            #[cfg(fusion)]
             let buffer_pool = buffer_pool.as_poll();
             let slice = self.op.into_inner();
             // Safety: result is valid
             let res = unsafe { buffer_pool.create_proxy(slice, result) };
-            #[cfg(all(buf_ring, fusion))]
+            #[cfg(fusion)]
             let res = BorrowedBuffer::new_poll(res);
             Ok(res)
         }
@@ -328,7 +328,7 @@ pub(crate) mod managed {
     impl<S> RecvManaged<S> {
         /// Create [`RecvManaged`].
         pub fn new(fd: SharedFd<S>, pool: &BufferPool, len: usize) -> io::Result<Self> {
-            #[cfg(all(buf_ring, fusion))]
+            #[cfg(fusion)]
             let pool = pool.as_poll();
             Ok(Self {
                 op: Recv::new(fd, pool.get_buffer(len)?),
@@ -347,17 +347,17 @@ pub(crate) mod managed {
             _: u32,
         ) -> io::Result<Self::Buffer<'_>> {
             let result = result?;
-            #[cfg(all(buf_ring, fusion))]
+            #[cfg(fusion)]
             let buffer_pool = buffer_pool.as_poll();
             let slice = self.op.into_inner();
             // Safety: result is valid
             let res = unsafe { buffer_pool.create_proxy(slice, result) };
-            #[cfg(all(buf_ring, fusion))]
+            #[cfg(fusion)]
             let res = BorrowedBuffer::new_poll(res);
             Ok(res)
         }
     }
 }
 
-#[cfg(not(buf_ring))]
+#[cfg(not(io_uring))]
 pub use managed::*;

compio-driver/src/poll/mod.rs

@@ -447,14 +447,14 @@ impl Driver {
         buffer_len: u16,
         buffer_size: usize,
     ) -> io::Result<BufferPool> {
-        #[cfg(all(buf_ring, fusion))]
+        #[cfg(fusion)]
         {
             Ok(BufferPool::new_poll(crate::FallbackBufferPool::new(
                 buffer_len,
                 buffer_size,
             )))
         }
-        #[cfg(not(all(buf_ring, fusion)))]
+        #[cfg(not(fusion))]
         {
             Ok(BufferPool::new(buffer_len, buffer_size))
         }