148 lines
3.4 KiB
C
148 lines
3.4 KiB
C
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/*
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* Copyright (c) 2006-2023, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2023-05-05 Bernard Implement vnode in dfs v2.0
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*/
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#include <dfs_file.h>
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#include <dfs_mnt.h>
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#ifdef RT_USING_PAGECACHE
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#include "dfs_pcache.h"
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#endif
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#define DBG_TAG "DFS.vnode"
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#define DBG_LVL DBG_WARNING
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#include <rtdbg.h>
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int dfs_vnode_init(struct dfs_vnode *vnode, int type, const struct dfs_file_ops *fops)
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{
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if (vnode)
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{
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rt_memset(vnode, 0, sizeof(struct dfs_vnode));
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vnode->type = type;
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rt_atomic_store(&(vnode->ref_count), 1);
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vnode->mnt = RT_NULL;
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vnode->fops = fops;
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}
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return 0;
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}
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struct dfs_vnode *dfs_vnode_create(void)
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{
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struct dfs_vnode *vnode = rt_calloc(1, sizeof(struct dfs_vnode));
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if (!vnode)
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{
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LOG_E("create a vnode failed.");
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return RT_NULL;
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}
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rt_atomic_store(&(vnode->ref_count), 1);
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LOG_I("create a vnode: %p", vnode);
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return vnode;
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}
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int dfs_vnode_destroy(struct dfs_vnode* vnode)
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{
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rt_err_t ret = RT_EOK;
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if (vnode)
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{
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ret = dfs_file_lock();
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if (ret == RT_EOK)
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{
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if (rt_atomic_load(&(vnode->ref_count)) == 1)
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{
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LOG_I("free a vnode: %p", vnode);
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#ifdef RT_USING_PAGECACHE
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if (vnode->aspace)
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{
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dfs_aspace_destroy(vnode->aspace);
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}
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#endif
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if (vnode->mnt)
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{
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DLOG(msg, "vnode", vnode->mnt->fs_ops->name, DLOG_MSG, "fs_ops->free_vnode");
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vnode->mnt->fs_ops->free_vnode(vnode);
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}
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else
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{
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DLOG(msg, "vnode", "vnode", DLOG_MSG, "destroy vnode(mnt=NULL)");
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}
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dfs_file_unlock();
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rt_free(vnode);
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}
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else
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{
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dfs_file_unlock();
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}
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}
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}
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return 0;
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}
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struct dfs_vnode *dfs_vnode_ref(struct dfs_vnode *vnode)
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{
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if (vnode)
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{
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rt_atomic_add(&(vnode->ref_count), 1);
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DLOG(note, "vnode", "vnode ref_count=%d", rt_atomic_load(&(vnode->ref_count)));
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}
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return vnode;
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}
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void dfs_vnode_unref(struct dfs_vnode *vnode)
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{
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rt_err_t ret = RT_EOK;
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if (vnode)
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{
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ret = dfs_file_lock();
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if (ret == RT_EOK)
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{
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rt_atomic_sub(&(vnode->ref_count), 1);
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DLOG(note, "vnode", "vnode ref_count=%d", rt_atomic_load(&(vnode->ref_count)));
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#ifdef RT_USING_PAGECACHE
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if (vnode->aspace)
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{
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dfs_aspace_destroy(vnode->aspace);
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}
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#endif
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if (rt_atomic_load(&(vnode->ref_count)) == 0)
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{
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LOG_I("free a vnode: %p", vnode);
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DLOG(msg, "vnode", "vnode", DLOG_MSG, "free vnode, ref_count=0");
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if (vnode->mnt)
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{
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DLOG(msg, "vnode", vnode->mnt->fs_ops->name, DLOG_MSG, "fs_ops->free_vnode");
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vnode->mnt->fs_ops->free_vnode(vnode);
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}
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dfs_file_unlock();
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rt_free(vnode);
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}
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else
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{
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dfs_file_unlock();
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DLOG(note, "vnode", "vnode ref_count=%d", rt_atomic_load(&(vnode->ref_count)));
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}
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}
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}
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return;
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}
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