first

rt-thread/components/dfs/dfs_v1/filesystems/mqueue/SConscript

@@ -0,0 +1,11 @@
+# RT-Thread building script for component
+
+from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c')
+CPPPATH = [cwd]
+
+group = DefineGroup('Filesystem', src, depend = ['RT_USING_DFS', 'RT_USING_DFS_MQUEUE'], CPPPATH = CPPPATH)
+
+Return('group')

rt-thread/components/dfs/dfs_v1/filesystems/mqueue/dfs_mqueue.c

@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-07-04     zhkag        first Version
+ */
+
+#include <rtthread.h>
+#include <rthw.h>
+#include <dfs_file.h>
+#include "dfs_mqueue.h"
+
+static rt_list_t _mqueue_file_list = RT_LIST_OBJECT_INIT(_mqueue_file_list);
+struct rt_spinlock mqueue_lock;
+
+void dfs_mqueue_insert_after(rt_list_t *n) {
+    rt_spin_lock(&mqueue_lock);
+    rt_list_insert_after(&(_mqueue_file_list), n);
+    rt_spin_unlock(&mqueue_lock);
+}
+
+struct mqueue_file *dfs_mqueue_lookup(const char *path, rt_size_t *size) {
+    struct mqueue_file *file;
+    rt_list_t *node;
+    rt_spin_lock(&mqueue_lock);
+    rt_list_for_each(node, &_mqueue_file_list) {
+        file = rt_list_entry(node, struct mqueue_file, list);
+
+        if (rt_strncmp(file->name, path, RT_NAME_MAX) == 0) {
+            *size = file->size;
+            rt_spin_unlock(&mqueue_lock);
+            return file;
+        }
+    }
+    rt_spin_unlock(&mqueue_lock);
+    return RT_NULL;
+}
+
+int dfs_mqueue_mount(struct dfs_filesystem *fs, unsigned long rwflag, const void *data) {
+    return RT_EOK;
+}
+
+int dfs_mqueue_unmount(struct dfs_filesystem *fs) { return RT_EOK; }
+
+int dfs_mqueue_statfs(struct dfs_filesystem *fs, struct statfs *buf) { return RT_EOK; }
+
+int dfs_mqueue_close(struct dfs_file *file) { return RT_EOK; }
+
+int dfs_mqueue_open(struct dfs_file *file) {
+    rt_size_t size;
+    if ((file->vnode->path[0] == '/') && (file->vnode->path[1] == '\0'))
+        return 0;
+
+    if (file->flags & O_DIRECTORY)
+        return -ENOENT;
+
+    struct mqueue_file *mq_file;
+
+    mq_file = dfs_mqueue_lookup(file->vnode->path + 1, &size);
+    if (mq_file == RT_NULL && !(file->flags & O_CREAT))
+        return -ENOENT;
+    if (mq_file == RT_NULL) {
+        mq_file = (struct mqueue_file *)rt_malloc(sizeof(struct mqueue_file));
+        if (mq_file == RT_NULL) {
+            return -ENFILE;
+        }
+        mq_file->msg_size = 8192;
+        mq_file->max_msgs = 10;
+        strncpy(mq_file->name, file->vnode->path + 1, RT_NAME_MAX);
+        dfs_mqueue_insert_after(&(mq_file->list));
+    }
+
+    if (file->flags & O_CREAT) {
+        rt_mq_t mq = rt_mq_create(file->vnode->path + 1, mq_file->msg_size, mq_file->max_msgs,
+                                  RT_IPC_FLAG_FIFO);
+        mq_file->data = (void *)mq;
+        file->vnode->data = mq_file;
+        file->vnode->size = 0;
+    }
+
+    return 0;
+}
+
+int dfs_mqueue_stat(struct dfs_filesystem *fs, const char *path, struct stat *st) {
+    st->st_dev = 0;
+    st->st_mode = S_IFREG | S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH;
+    st->st_size = 0;
+    st->st_mtime = 0;
+    return RT_EOK;
+}
+
+int dfs_mqueue_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count) {
+    rt_size_t index, end;
+    struct dirent *d;
+    count = (count / sizeof(struct dirent));
+    end = file->pos + count;
+    index = 0;
+    count = 0;
+    struct mqueue_file *mq_file;
+    rt_list_t *node;
+    rt_spin_lock(&mqueue_lock);
+    rt_list_for_each(node, &_mqueue_file_list) {
+        if (index >= (rt_size_t)file->pos) {
+            mq_file = rt_list_entry(node, struct mqueue_file, list);
+            d = dirp + count;
+            d->d_namlen = RT_NAME_MAX;
+            d->d_reclen = (rt_uint16_t)sizeof(struct dirent);
+            rt_strncpy(d->d_name, mq_file->name, RT_NAME_MAX);
+            count += 1;
+            file->pos += 1;
+        }
+        index += 1;
+        if (index >= end) {
+            break;
+        }
+    }
+    rt_spin_unlock(&mqueue_lock);
+    return count * sizeof(struct dirent);
+}
+
+int dfs_mqueue_unlink(struct dfs_filesystem *fs, const char *path) {
+    rt_size_t size;
+    struct mqueue_file *mq_file;
+    mq_file = dfs_mqueue_lookup(path + 1, &size);
+    if (mq_file == RT_NULL)
+        return -ENOENT;
+    rt_list_remove(&(mq_file->list));
+    if (mq_file->data != RT_NULL)
+        rt_mq_delete((rt_mq_t)mq_file->data);
+    rt_free(mq_file);
+    return RT_EOK;
+}
+
+static const struct dfs_file_ops _mqueue_fops = {
+    .open = dfs_mqueue_open,
+    .close = dfs_mqueue_close,
+    .getdents = dfs_mqueue_getdents,
+};
+
+static const struct dfs_filesystem_ops _mqueue = {
+    .name = "mqueue",
+    .flags = DFS_FS_FLAG_DEFAULT,
+    .fops = &_mqueue_fops,
+
+    .mount = dfs_mqueue_mount,
+    .unmount = dfs_mqueue_unmount,
+    .statfs = dfs_mqueue_statfs,
+
+    .unlink = dfs_mqueue_unlink,
+    .stat = dfs_mqueue_stat,
+};
+
+int dfs_mqueue_init(void) {
+    /* register mqueue file system */
+    dfs_register(&_mqueue);
+    mkdir("/dev/mqueue", 0x777);
+    if (dfs_mount(RT_NULL, "/dev/mqueue", "mqueue", 0, 0) != 0) {
+        rt_kprintf("Dir /dev/mqueue mount failed!\n");
+    }
+    return 0;
+}
+INIT_ENV_EXPORT(dfs_mqueue_init);

rt-thread/components/dfs/dfs_v1/filesystems/mqueue/dfs_mqueue.h

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-07-04     zhkag        first Version
+ */
+
+#ifndef __DFS_MQUEUE_H__
+#define __DFS_MQUEUE_H__
+
+#include <rtthread.h>
+
+struct mqueue_file {
+    char name[RT_NAME_MAX]; /* file name */
+    rt_uint16_t msg_size;   /**< message size of each message */
+    rt_uint16_t max_msgs;   /**< max number of messages */
+    rt_list_t list;
+    rt_uint8_t *data; /* file date ptr */
+    rt_size_t size;   /* file size */
+};
+
+struct mqueue_file *dfs_mqueue_lookup(const char *path, rt_size_t *size);
+void dfs_mqueue_insert_after(rt_list_t *n);
+
+#endif