first

rt-thread/components/dfs/dfs_v2/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_v2/filesystems/mqueue/dfs_mqueue.c

@@ -0,0 +1,241 @@
+/*
+ * 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.h>
+#include <dfs_fs.h>
+#include <dfs_file.h>
+#include <dfs_dentry.h>
+#include <dfs_mnt.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_mnt *mnt, unsigned long rwflag, const void *data) {
+    return RT_EOK;
+}
+
+int dfs_mqueue_umount(struct dfs_mnt *mnt) {
+    return RT_EOK;
+}
+
+int dfs_mqueue_statfs(struct dfs_mnt *mnt, 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) {
+    return 0;
+}
+
+int dfs_mqueue_stat(struct dfs_dentry *dentry, struct stat *st) {
+    struct dfs_vnode *vnode = RT_NULL;
+    if (dentry && dentry->vnode) {
+        vnode = dentry->vnode;
+        st->st_dev = 0;
+        st->st_gid = vnode->gid;
+        st->st_uid = vnode->uid;
+        st->st_ino = 0;
+        st->st_mode = vnode->mode;
+        st->st_nlink = vnode->nlink;
+        st->st_size = vnode->size;
+        st->st_mtim.tv_nsec = vnode->mtime.tv_nsec;
+        st->st_mtim.tv_sec = vnode->mtime.tv_sec;
+        st->st_ctim.tv_nsec = vnode->ctime.tv_nsec;
+        st->st_ctim.tv_sec = vnode->ctime.tv_sec;
+        st->st_atim.tv_nsec = vnode->atime.tv_nsec;
+        st->st_atim.tv_sec = vnode->atime.tv_sec;
+    }
+    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->fpos + 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->fpos) {
+            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->fpos += 1;
+        }
+        index += 1;
+        if (index >= end) {
+            break;
+        }
+    }
+    rt_spin_unlock(&mqueue_lock);
+    return count * sizeof(struct dirent);
+}
+
+int dfs_mqueue_unlink(struct dfs_dentry *dentry) {
+    rt_size_t size;
+    struct mqueue_file *mq_file;
+    mq_file = dfs_mqueue_lookup(dentry->pathname + 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 struct dfs_vnode *dfs_mqueue_create_vnode(struct dfs_dentry *dentry, int type, mode_t mode) {
+    struct dfs_vnode *vnode = RT_NULL;
+    rt_size_t size;
+    struct mqueue_file *mq_file;
+
+    if (dentry == NULL || dentry->mnt == NULL) {
+        return NULL;
+    }
+
+    vnode = dfs_vnode_create();
+    if (vnode) {
+        mq_file = dfs_mqueue_lookup(dentry->pathname + 1, &size);
+        if (mq_file == RT_NULL) {
+            mq_file = (struct mqueue_file *)rt_malloc(sizeof(struct mqueue_file));
+            if (mq_file == RT_NULL) {
+                return NULL;
+            }
+            mq_file->msg_size = 8192;
+            mq_file->max_msgs = 10;
+            strncpy(mq_file->name, dentry->pathname + 1, RT_NAME_MAX - 1);
+            dfs_mqueue_insert_after(&(mq_file->list));
+        }
+
+        vnode->mode = S_IFREG | (S_IRWXU | S_IRWXG | S_IRWXO);
+        vnode->type = FT_REGULAR;
+        rt_mq_t mq = rt_mq_create(dentry->pathname + 1, mq_file->msg_size, mq_file->max_msgs,
+                                  RT_IPC_FLAG_FIFO);
+        mq_file->data = (void *)mq;
+        vnode->data = mq_file;
+        vnode->size = 0;
+    }
+    return vnode;
+}
+
+static int dfs_mqueue_free_vnode(struct dfs_vnode *vnode) {
+    /* nothing to be freed */
+    if (vnode && vnode->ref_count <= 1) {
+        vnode->data = NULL;
+    }
+    return 0;
+}
+
+static const struct dfs_file_ops _mqueue_fops = {
+    .open = dfs_mqueue_open,
+    .close = dfs_mqueue_close,
+    .getdents = dfs_mqueue_getdents,
+};
+
+struct dfs_vnode *_dfs_mqueue_lookup(struct dfs_dentry *dentry) {
+    struct dfs_vnode *vnode = RT_NULL;
+    rt_size_t size;
+    // struct tmpfs_sb *superblock;
+    struct mqueue_file *mq_file;
+
+    if (dentry == NULL || dentry->mnt == NULL) {
+        return NULL;
+    }
+
+    if (dentry->pathname[0] == '/' && dentry->pathname[1] == '\0') {
+    }
+
+    mq_file = dfs_mqueue_lookup(dentry->pathname + 1, &size);
+
+    vnode = dfs_vnode_create();
+    if (mq_file && mq_file->data) {
+        vnode->mode = S_IFREG | (S_IRWXU | S_IRWXG | S_IRWXO);
+        vnode->type = FT_REGULAR;
+        vnode->mnt = dentry->mnt;
+        vnode->data = mq_file;
+        vnode->size = mq_file->size;
+    } else {
+        vnode->size = 0;
+        vnode->nlink = 1;
+        vnode->fops = &_mqueue_fops;
+        vnode->mnt = dentry->mnt;
+        vnode->type = FT_DIRECTORY;
+        vnode->mode = S_IFDIR | (S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
+    }
+    return vnode;
+}
+
+static const struct dfs_filesystem_ops _mqueue_ops = {
+    .name = "mqueue",
+    .flags = DFS_FS_FLAG_DEFAULT,
+    .default_fops = &_mqueue_fops,
+
+    .mount = dfs_mqueue_mount,
+    .umount = dfs_mqueue_umount,
+    .statfs = dfs_mqueue_statfs,
+
+    .unlink = dfs_mqueue_unlink,
+    .stat = dfs_mqueue_stat,
+
+    .lookup = _dfs_mqueue_lookup,
+    .create_vnode = dfs_mqueue_create_vnode,
+    .free_vnode = dfs_mqueue_free_vnode
+};
+
+static struct dfs_filesystem_type _mqueue = {
+    .fs_ops = &_mqueue_ops,
+};
+
+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_v2/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