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/*
* 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);
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