fix: mkdir输出错误信息; feat: 实现get_pathname #615

1037827920 · 2024-03-16T13:23:31Z

User description

此拉取请求取消了mkdir时输入不正确的目录名输出错误信息，和实现了get_pathname，用来统一在用户态获取路径名时进行合法性判断并将其复制到内核空间

Type

Bug fix, Enhancement

Description

此拉取请求修复了mkdir时输入不正确的目录名输出错误信息的问题，并实现了get_pathname函数，用于在用户态获取路径名时进行合法性判断并将其复制到内核空间。此外，还更新了文件路径处理函数和系统调用处理函数，现在使用get_pathname函数来处理文件路径字符串，并将其从用户空间复制到内核空间。

Changes walkthrough

Relevant files

Bug fix

open.rs `修复mkdir错误输出和实现路径名获取功能` kernel/src/filesystem/vfs/open.rs 修复了mkdir时输入不正确的目录名输出错误信息的问题。实现了get_pathname函数，用于在用户态获取路径名时进行合法性判断并将其复制到内核空间。

Enhancement

syscall.rs `更新文件路径处理函数` kernel/src/filesystem/vfs/syscall.rs 更新了文件路径处理函数，现在使用get_pathname函数来处理文件路径字符串，并将其从用户空间复制到内核空间。
mod.rs `更新系统调用路径处理函数` kernel/src/syscall/mod.rs 更新了系统调用处理函数，现在使用get_pathname函数来处理文件路径字符串，并将其从用户空间复制到内核空间。

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dragonos-community-ai-pr-reviewer · 2024-03-16T13:24:07Z

PR Description updated to latest commit (c031fdb)

dragonos-community-ai-pr-reviewer · 2024-03-16T13:24:28Z

PR Analysis

🎯 Main theme: Bug fix and Enhancement
📝 PR summary: This PR fixes the issue of incorrect error messages being output when using the mkdir system call with an incorrect directory name. It also adds a new feature, get_pathname, which is used to uniformly handle the retrieval of pathnames from user space to kernel space.
📌 Type of PR: Bug fix, Enhancement
🧪 Relevant tests added: True
⏱️ Estimated effort to review [1-5]: 3, because the changes involve multiple files and require careful review to ensure that the bug fix is complete and the new feature is implemented correctly.
🔒 Security concerns: No, there are no visible security concerns in the provided diff.

PR Feedback

💡 General suggestions: The implementation of get_pathname seems to be a good approach to standardize pathname handling. Ensure that the function is robust and can handle all edge cases, especially considering the potential for pathnames with special characters or very long lengths. Additionally, verify that the error messages for mkdir are now accurately reflecting the input errors.

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dragonos-community-ai-pr-reviewer · 2024-03-16T13:25:08Z

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Suggestions

enhancement

在路径长度为0时返回更详细的错误信息。在处理路径长度为0的情况时，直接返回错误码EINVAL可能不够充分，可以考虑添加更详细的错误信息，以帮助用户了解问题所在。 kernel/src/filesystem/vfs/open.rs [36] if path.len() == 0 { - return Err(SystemError::EINVAL); + return Err(SystemError::EINVAL.with_description("Path length is zero")); }
在路径长度为0时返回更详细的错误信息。在处理路径长度为0的情况时，直接返回错误码EINVAL可能不够充分，可以考虑添加更详细的错误信息，以帮助用户了解问题所在。 kernel/src/filesystem/vfs/open.rs [48] if path.len() == 0 { - return Err(SystemError::EINVAL); + return Err(SystemError::EINVAL.with_description("Path length is zero")); }
在路径长度为0时返回更详细的错误信息。在处理路径长度为0的情况时，直接返回错误码EINVAL可能不够充分，可以考虑添加更详细的错误信息，以帮助用户了解问题所在。 kernel/src/filesystem/vfs/syscall.rs [48] if path.len() == 0 { - return Err(SystemError::EINVAL); + return Err(SystemError::EINVAL.with_description("Path length is zero")); }
在路径长度为0时返回更详细的错误信息。在处理路径长度为0的情况时，直接返回错误码EINVAL可能不够充分，可以考虑添加更详细的错误信息，以帮助用户了解问题所在。 kernel/src/filesystem/vfs/syscall.rs [50] if path.len() == 0 { - return Err(SystemError::EINVAL); + return Err(SystemError::EINVAL.with_description("Path length is zero")); }

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fslongjin · 2024-03-16T16:05:31Z

更新之后直接提交，然后push就行，不用重新开一个PR，如果重新开了PR的话，麻烦把之前那个PR的链接粘贴到这里来

fslongjin · 2024-03-16T16:06:14Z

@dragonosbot assign @GnoCiYeH

1037827920 · 2024-03-16T16:15:28Z

之前那个pr我也是更新合并到fork出来的库，我怕又冲突了，我直接把那个pr关了

fslongjin · 2024-03-16T16:16:33Z

噢噢噢哈哈明白了

…

---原始邮件--- 发件人: ***@***.***> 发送时间: 2024年3月17日(周日) 凌晨0:15 收件人: ***@***.***>; 抄送: ***@***.******@***.***>; 主题: Re: [DragonOS-Community/DragonOS] fix: mkdir输出错误信息; feat: 实现get_pathname (PR #615) 之前那个pr我也是更新合并到fork出来的库，我怕又冲突了，我直接把那个pr关了 — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you commented.Message ID: ***@***.***>

fslongjin · 2024-03-17T05:50:38Z

kernel/src/syscall/mod.rs

-                let path: &CStr = unsafe { CStr::from_ptr(args[1] as *const c_char) };
+                let pathname = args[1] as *const u8;
+                let pathname =
+                    Self::get_pathname(pathname).map_err(|_| SystemError::EINVAL.into())?;


这些操作不应该在这里执行。应当写到vfs里面的函数内。因为这样会造成vfs和通用的syscall入口的耦合。

fslongjin · 2024-03-17T05:52:10Z

kernel/src/filesystem/vfs/syscall.rs

@@ -1017,6 +985,21 @@ impl Syscall {
        kwarn!("fchmod not fully implemented");
        return Ok(0);
    }
+
+    /// @brief 处理文件路径字符串，并将其从用户空间复制到内核空间
+    pub fn get_pathname(pathname: *const u8) -> Result<String, SystemError> {


这个函数我觉得可以删掉，因为判断是否超过最大长度，check_and_clone_str已经做了。然后判断是否为空这个，不需要判断。因为lookup的时候本身就会去报出相应的错误。

fslongjin · 2024-03-17T05:52:57Z

@dragonosbot author

1037827920 · 2024-03-17T08:07:11Z

@dragonosbot review

fix: mkdir输出错误信息; feat: 实现get_pathname

c031fdb

dragonos-community-ai-pr-reviewer bot added enhancement New feature or request Bug fix A bug is fixed in this pull request labels Mar 16, 2024

dragonos-community-ai-pr-reviewer bot added the Review effort [1-5]: 3 label Mar 16, 2024

dragonosbot assigned GnoCiYeH Mar 16, 2024

fslongjin added the S-等待审查 Status: 等待assignee以及相关方的审查。 label Mar 16, 2024

fslongjin requested changes Mar 17, 2024

View reviewed changes

dragonosbot added S-等待作者修改 Status: 这正在等待作者的一些操作（例如代码更改或更多信息）。 and removed S-等待审查 Status: 等待assignee以及相关方的审查。 labels Mar 17, 2024

1037827920 added 2 commits March 17, 2024 14:12

Merge branch 'master' into hmt

17af4da

fix: 将处理路径的操作放入vfs而不是在syscall/mod.rs中

dfcfdc9

dragonosbot added the A-fs Area: 文件系统 label Mar 17, 2024

dragonosbot added S-等待审查 Status: 等待assignee以及相关方的审查。 and removed S-等待作者修改 Status: 这正在等待作者的一些操作（例如代码更改或更多信息）。 labels Mar 17, 2024

fslongjin added 2 commits March 19, 2024 08:26

调整入参类型

d0a4a2c

Merge remote-tracking branch 'up/master' into hmt

b7bbaf9

fslongjin approved these changes Mar 19, 2024

View reviewed changes

fslongjin merged commit 82df0a1 into DragonOS-Community:master Mar 19, 2024

1037827920 deleted the hmt branch March 19, 2024 10:41

1037827920 mentioned this pull request May 31, 2024

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fix: mkdir输出错误信息; feat: 实现get_pathname #615

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