DragonOS-Community/DragonOS
4
1
Fork 0
mirror of https://github.com/DragonOS-Community/DragonOS.git synced 2025-06-21 11:56:34 +00:00
Code Issues Releases Wiki Activity

new: devfs设备卸载

Browse Source
This commit is contained in:
fslongjin
2022-10-06 14:48:44 +08:00
parent 85719d938d
commit 7e0835c92f
10 changed files with 209 additions and 66 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
kernel/filesystem/VFS/VFS.c
View File

@ -514,6 +514,11 @@ struct vfs_dir_entry_t *vfs_alloc_dentry(const int name_size)
if (unlikely(dentry == NULL))
return NULL;
dentry->name = (char *)kzalloc(name_size, 0);
// 初始化lockref
spin_init(&dentry->lockref.lock);
dentry->lockref.count = 1;
// 初始化链表
list_init(&dentry->child_node_list);
list_init(&dentry->subdirs_list);
return dentry;
@ -604,6 +609,7 @@ int64_t vfs_rmdir(const char *path, bool from_userland)
if (retval != 0)
return retval;
// todo: 对dentry和inode加锁
spin_lock(&dentry->lockref.lock);
retval = -EBUSY;
if (is_local_mountpoint(dentry))
goto out;
@ -616,8 +622,11 @@ int64_t vfs_rmdir(const char *path, bool from_userland)
dont_mount(dentry); // 将当前dentry标记为不可被挂载
detach_mounts(dentry); // 清理同样挂载在该路径的所有挂载点的挂载树
vfs_dentry_put(dentry); // 释放dentry
if (vfs_dentry_put(dentry) != 0)
goto out; // 释放dentry
return retval;
out:;
spin_unlock(&dentry->lockref.lock);
// todo: 对dentry和inode放锁
return retval;
}
@ -644,7 +653,8 @@ uint64_t sys_rmdir(struct pt_regs *regs)
struct vfs_index_node_t *vfs_alloc_inode()
{
struct vfs_index_node_t *inode = kzalloc(sizeof(struct vfs_index_node_t), 0);
inode->ref_count = 1; // 初始化引用计数为1
spin_init(&inode->lockref.lock);
inode->lockref.count = 1; // 初始化引用计数为1
return inode;
}