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pxar: avoid taking ownership of xattrs, fcaps and quota_projid on corresponding restore functions.

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By borrowing these objects we preserve the functionality but make sure
that ownership doesn't change, avoiding problems when contained within other
structs such as e.g. a buffer storing these attributes.

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
This commit is contained in:
Christian Ebner
2019-08-01 12:13:07 +02:00
committed by Dietmar Maurer
parent 2c3891d1c3
commit 2be3eff5c3
2 changed files with 14 additions and 14 deletions
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14
src/tools/xattr.rs
View File

@ -64,7 +64,7 @@ pub fn fgetxattr(fd: RawFd, name: &[u8]) -> Result<Vec<u8>, nix::errno::Errno> {
Ok(buffer)
}
pub fn fsetxattr(fd: RawFd, xattr: CaFormatXAttr) -> Result<(), nix::errno::Errno> {
pub fn fsetxattr(fd: RawFd, xattr: &CaFormatXAttr) -> Result<(), nix::errno::Errno> {
let mut name = xattr.name.clone();
name.push('\0' as u8);
let flags = 0 as libc::c_int;
@ -79,7 +79,7 @@ pub fn fsetxattr(fd: RawFd, xattr: CaFormatXAttr) -> Result<(), nix::errno::Errn
Ok(())
}
pub fn fsetxattr_fcaps(fd: RawFd, fcaps: CaFormatFCaps) -> Result<(), nix::errno::Errno> {
pub fn fsetxattr_fcaps(fd: RawFd, fcaps: &CaFormatFCaps) -> Result<(), nix::errno::Errno> {
// TODO casync checks and removes capabilities if they are set
let name = b"security.capability\0";
let flags = 0 as libc::c_int;
@ -159,15 +159,15 @@ mod tests {
value: b"err".to_vec(),
};
assert!(fsetxattr(fd, valid_user).is_ok());
assert!(fsetxattr(fd, valid_empty_value).is_ok());
assert!(fsetxattr(fd, &valid_user).is_ok());
assert!(fsetxattr(fd, &valid_empty_value).is_ok());
if nix::unistd::Uid::current() != nix::unistd::ROOT {
assert_eq!(fsetxattr(fd, invalid_trusted), Err(Errno::EPERM));
assert_eq!(fsetxattr(fd, &invalid_trusted), Err(Errno::EPERM));
}
assert_eq!(fsetxattr(fd, invalid_name_prefix), Err(Errno::EOPNOTSUPP));
assert_eq!(fsetxattr(fd, invalid_name_length), Err(Errno::ERANGE));
assert_eq!(fsetxattr(fd, &invalid_name_prefix), Err(Errno::EOPNOTSUPP));
assert_eq!(fsetxattr(fd, &invalid_name_length), Err(Errno::ERANGE));
let v0 = fgetxattr(fd, b"user.attribute0\0".as_ref()).unwrap();
let v1 = fgetxattr(fd, b"user.empty\0".as_ref()).unwrap();