feat: Add certs, init, io_uring, security, usr, virt subsystems, Nano editor & full LazyBox suite

io_uring/io_uring.c

@@ -0,0 +1,114 @@
+#include <io_uring/io_uring.h>
+#include <fs/vfs.h>
+#include <lib/string.h>
+#include <kernel/printk.h>
+
+static io_uring_ring_t default_ring;
+
+void io_uring_init(void) {
+    memset(&default_ring, 0, sizeof(default_ring));
+    printk(KERN_INFO "IO_URING: Async I/O Ring initialized (Depth: %d SQEs/CQEs)\n", IORING_QUEUE_DEPTH);
+}
+
+io_uring_ring_t* io_uring_get_default_ring(void) {
+    return &default_ring;
+}
+
+io_uring_sqe_t* io_uring_get_sqe(io_uring_ring_t* ring) {
+    if (!ring) return NULL;
+    uint32_t next = (ring->sq_tail + 1) % IORING_QUEUE_DEPTH;
+    if (next == ring->sq_head) {
+        return NULL; // Queue full
+    }
+
+    io_uring_sqe_t* sqe = &ring->sqes[ring->sq_tail];
+    memset(sqe, 0, sizeof(io_uring_sqe_t));
+    ring->sq_tail = next;
+    return sqe;
+}
+
+int io_uring_submit(io_uring_ring_t* ring) {
+    if (!ring) return -1;
+    int processed = 0;
+
+    while (ring->sq_head != ring->sq_tail) {
+        io_uring_sqe_t* sqe = &ring->sqes[ring->sq_head];
+        int32_t res = 0;
+
+        switch (sqe->opcode) {
+            case IORING_OP_NOP:
+                res = 0;
+                break;
+
+            case IORING_OP_READV:
+            case IORING_OP_READ_FIXED: {
+                if (sqe->fd >= 0 && sqe->addr && sqe->len > 0) {
+                    if (sqe->off > 0) {
+                        vfs_lseek(sqe->fd, (off_t)sqe->off, SEEK_SET);
+                    }
+                    res = (int32_t)vfs_read(sqe->fd, (void*)sqe->addr, sqe->len);
+                } else {
+                    res = -1;
+                }
+                break;
+            }
+
+            case IORING_OP_WRITEV:
+            case IORING_OP_WRITE_FIXED: {
+                if (sqe->fd >= 0 && sqe->addr && sqe->len > 0) {
+                    if (sqe->off > 0) {
+                        vfs_lseek(sqe->fd, (off_t)sqe->off, SEEK_SET);
+                    }
+                    res = (int32_t)vfs_write(sqe->fd, (const void*)sqe->addr, sqe->len);
+                } else {
+                    res = -1;
+                }
+                break;
+            }
+
+            case IORING_OP_CLOSE: {
+                if (sqe->fd >= 0) {
+                    res = vfs_close(sqe->fd);
+                }
+                break;
+            }
+
+            case IORING_OP_FSYNC:
+                res = 0;
+                break;
+
+            default:
+                res = -1;
+                break;
+        }
+
+        // Post to CQE ring
+        uint32_t next_cq = (ring->cq_tail + 1) % IORING_QUEUE_DEPTH;
+        if (next_cq != ring->cq_head) {
+            io_uring_cqe_t* cqe = &ring->cqes[ring->cq_tail];
+            cqe->user_data = sqe->user_data;
+            cqe->res       = res;
+            cqe->flags     = 0;
+            ring->cq_tail  = next_cq;
+            ring->completed++;
+        }
+
+        ring->sq_head = (ring->sq_head + 1) % IORING_QUEUE_DEPTH;
+        ring->submitted++;
+        processed++;
+    }
+
+    return processed;
+}
+
+io_uring_cqe_t* io_uring_peek_cqe(io_uring_ring_t* ring) {
+    if (!ring || ring->cq_head == ring->cq_tail) return NULL;
+    return &ring->cqes[ring->cq_head];
+}
+
+void io_uring_cqe_seen(io_uring_ring_t* ring, io_uring_cqe_t* cqe) {
+    (void)cqe;
+    if (ring && ring->cq_head != ring->cq_tail) {
+        ring->cq_head = (ring->cq_head + 1) % IORING_QUEUE_DEPTH;
+    }
+}