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Refactor DentryMnt and fix some issues

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Signed-off-by: Zhenchen Wang <m202372036@hust.edu.cn>
This commit is contained in:
Zhenchen Wang
2024-04-23 16:04:31 +08:00
committed by Tate, Hongliang Tian
parent 60fa4d104a
commit 8d18a12385
38 changed files with 591 additions and 572 deletions
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31
kernel/aster-nix/src/syscall/link.rs
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@ -14,37 +14,37 @@ use crate::{
pub fn sys_linkat(
old_dirfd: FileDesc,
old_pathname_addr: Vaddr,
old_path_addr: Vaddr,
new_dirfd: FileDesc,
new_pathname_addr: Vaddr,
new_path_addr: Vaddr,
flags: u32,
) -> Result<SyscallReturn> {
log_syscall_entry!(SYS_LINKAT);
let old_pathname = read_cstring_from_user(old_pathname_addr, MAX_FILENAME_LEN)?;
let new_pathname = read_cstring_from_user(new_pathname_addr, MAX_FILENAME_LEN)?;
let old_path = read_cstring_from_user(old_path_addr, MAX_FILENAME_LEN)?;
let new_path = read_cstring_from_user(new_path_addr, MAX_FILENAME_LEN)?;
let flags =
LinkFlags::from_bits(flags).ok_or(Error::with_message(Errno::EINVAL, "invalid flags"))?;
debug!(
"old_dirfd = {}, old_pathname = {:?}, new_dirfd = {}, new_pathname = {:?}, flags = {:?}",
old_dirfd, old_pathname, new_dirfd, new_pathname, flags
"old_dirfd = {}, old_path = {:?}, new_dirfd = {}, new_path = {:?}, flags = {:?}",
old_dirfd, old_path, new_dirfd, new_path, flags
);
let current = current!();
let (old_dentrymnt, new_dir_dentrymnt, new_name) = {
let old_pathname = old_pathname.to_string_lossy();
if old_pathname.ends_with('/') {
let old_path = old_path.to_string_lossy();
if old_path.ends_with('/') {
return_errno_with_message!(Errno::EPERM, "oldpath is dir");
}
if old_pathname.is_empty() && !flags.contains(LinkFlags::AT_EMPTY_PATH) {
if old_path.is_empty() && !flags.contains(LinkFlags::AT_EMPTY_PATH) {
return_errno_with_message!(Errno::ENOENT, "oldpath is empty");
}
let new_pathname = new_pathname.to_string_lossy();
if new_pathname.ends_with('/') || new_pathname.is_empty() {
let new_path = new_path.to_string_lossy();
if new_path.ends_with('/') || new_path.is_empty() {
return_errno_with_message!(Errno::ENOENT, "newpath is dir or is empty");
}
let old_fs_path = FsPath::new(old_dirfd, old_pathname.as_ref())?;
let new_fs_path = FsPath::new(new_dirfd, new_pathname.as_ref())?;
let old_fs_path = FsPath::new(old_dirfd, old_path.as_ref())?;
let new_fs_path = FsPath::new(new_dirfd, new_path.as_ref())?;
let fs = current.fs().read();
let old_dentrymnt = if flags.contains(LinkFlags::AT_SYMLINK_FOLLOW) {
fs.lookup(&old_fs_path)?
@ -54,12 +54,13 @@ pub fn sys_linkat(
let (new_dir_dentrymnt, new_name) = fs.lookup_dir_and_base_name(&new_fs_path)?;
(old_dentrymnt, new_dir_dentrymnt, new_name)
};
new_dir_dentrymnt.link(&old_dentrymnt, &new_name)?;
Ok(SyscallReturn::Return(0))
}
pub fn sys_link(old_pathname_addr: Vaddr, new_pathname_addr: Vaddr) -> Result<SyscallReturn> {
self::sys_linkat(AT_FDCWD, old_pathname_addr, AT_FDCWD, new_pathname_addr, 0)
pub fn sys_link(old_path_addr: Vaddr, new_path_addr: Vaddr) -> Result<SyscallReturn> {
self::sys_linkat(AT_FDCWD, old_path_addr, AT_FDCWD, new_path_addr, 0)
}
bitflags::bitflags! {