src/pxar/format_definition.rs: define types and structs needed to impl ACL support in pxar
Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
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@ -16,6 +16,12 @@ pub const CA_FORMAT_FILENAME: u64 = 0x6dbb6ebcb3161f0b;
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pub const CA_FORMAT_SYMLINK: u64 = 0x664a6fb6830e0d6c;
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pub const CA_FORMAT_DEVICE: u64 = 0xac3dace369dfe643;
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pub const CA_FORMAT_XATTR: u64 = 0xb8157091f80bc486;
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pub const CA_FORMAT_ACL_USER: u64 = 0x297dc88b2ef12faf;
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pub const CA_FORMAT_ACL_GROUP: u64 = 0x36f2acb56cb3dd0b;
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pub const CA_FORMAT_ACL_GROUP_OBJ: u64 = 0x23047110441f38f3;
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pub const CA_FORMAT_ACL_DEFAULT: u64 = 0xfe3eeda6823c8cd0;
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pub const CA_FORMAT_ACL_DEFAULT_USER: u64 = 0xbdf03df9bd010a91;
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pub const CA_FORMAT_ACL_DEFAULT_GROUP: u64 = 0xa0cb1168782d1f51;
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pub const CA_FORMAT_FCAPS: u64 = 0xf7267db0afed0629;
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// compute_goodbye_hash(b"__PROXMOX_FORMAT_HARDLINK__");
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@ -30,7 +36,7 @@ pub const CA_FORMAT_GOODBYE_TAIL_MARKER: u64 = 0x57446fa533702943;
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// Feature flags
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/// restrict UIDs toö 16 bit
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/// restrict UIDs to 16 bit
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pub const CA_FORMAT_WITH_16BIT_UIDS: u64 = 0x1;
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/// assume UIDs are 32 bit
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pub const CA_FORMAT_WITH_32BIT_UIDS: u64 = 0x2;
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@ -59,7 +65,7 @@ pub const CA_FORMAT_WITH_FLAG_SYSTEM: u64 = 0x4000;
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/// DOS file flag `ARCHIVE`
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pub const CA_FORMAT_WITH_FLAG_ARCHIVE: u64 = 0x8000;
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// chattr() flags#
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// chattr() flags
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/// Linux file attribute `APPEND`
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pub const CA_FORMAT_WITH_FLAG_APPEND: u64 = 0x10000;
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/// Linux file attribute `NOATIME`
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@ -87,7 +93,7 @@ pub const CA_FORMAT_WITH_SUBVOLUME: u64 = 0x4000000;
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// Include BTRFS read-only subvolume flag
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pub const CA_FORMAT_WITH_SUBVOLUME_RO: u64 = 0x8000000;
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/// Include Extended Attribute metadata */
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/// Include Extended Attribute metadata
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pub const CA_FORMAT_WITH_XATTRS: u64 = 0x10000000;
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/// Include Access Control List metadata
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pub const CA_FORMAT_WITH_ACL: u64 = 0x20000000;
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@ -108,6 +114,7 @@ pub const CA_FORMAT_EXCLUDE_SUBMOUNTS: u64 = 0x4000000000000000;
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/// Exclude entries with chattr flag NODUMP
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pub const CA_FORMAT_EXCLUDE_NODUMP: u64 = 0x8000000000000000;
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/// Default feature flags for encoder/decoder
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pub const CA_FORMAT_DEFAULT: u64 =
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CA_FORMAT_WITH_32BIT_UIDS |
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CA_FORMAT_WITH_USER_NAMES |
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@ -231,6 +238,96 @@ pub struct CaFormatFCaps {
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pub data: Vec<u8>,
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}
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#[derive(Debug, Endian, Eq)]
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#[repr(C)]
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pub struct CaFormatACLUser {
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pub uid: u64,
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pub permissions: u64,
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//pub name: Vec<u64>, not impl for now
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}
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// TODO if also name is impl, sort by uid, then by name and last by permissions
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impl Ord for CaFormatACLUser {
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fn cmp(&self, other: &CaFormatACLUser) -> Ordering {
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match self.uid.cmp(&other.uid) {
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// uids are equal, entries ordered by permissions
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Ordering::Equal => self.permissions.cmp(&other.permissions),
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// uids are different, entries ordered by uid
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uid_order => uid_order,
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}
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}
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}
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impl PartialOrd for CaFormatACLUser {
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fn partial_cmp(&self, other: &CaFormatACLUser) -> Option<Ordering> {
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Some(self.cmp(other))
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}
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}
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impl PartialEq for CaFormatACLUser {
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fn eq(&self, other: &CaFormatACLUser) -> bool {
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self.uid == other.uid && self.permissions == other.permissions
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}
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}
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#[derive(Debug, Endian, Eq)]
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#[repr(C)]
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pub struct CaFormatACLGroup {
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pub gid: u64,
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pub permissions: u64,
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//pub name: Vec<u64>, not impl for now
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}
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// TODO if also name is impl, sort by gid, then by name and last by permissions
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impl Ord for CaFormatACLGroup {
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fn cmp(&self, other: &CaFormatACLGroup) -> Ordering {
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match self.gid.cmp(&other.gid) {
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// gids are equal, entries are ordered by permissions
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Ordering::Equal => self.permissions.cmp(&other.permissions),
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// gids are different, entries ordered by gid
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gid_ordering => gid_ordering,
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}
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}
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}
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impl PartialOrd for CaFormatACLGroup {
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fn partial_cmp(&self, other: &CaFormatACLGroup) -> Option<Ordering> {
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Some(self.cmp(other))
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}
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}
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impl PartialEq for CaFormatACLGroup {
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fn eq(&self, other: &CaFormatACLGroup) -> bool {
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self.gid == other.gid && self.permissions == other.permissions
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}
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}
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#[derive(Debug, Endian)]
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#[repr(C)]
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pub struct CaFormatACLGroupObj {
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pub permissions: u64,
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}
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#[derive(Debug, Endian)]
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#[repr(C)]
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pub struct CaFormatACLDefault {
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pub user_obj_permissions: u64,
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pub group_obj_permissions: u64,
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pub other_permissions: u64,
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pub mask_permissions: u64,
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}
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pub (crate) struct PxarACL {
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pub users: Vec<CaFormatACLUser>,
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pub groups: Vec<CaFormatACLGroup>,
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pub group_obj: Option<CaFormatACLGroupObj>,
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pub default: Option<CaFormatACLDefault>,
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}
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pub const CA_FORMAT_ACL_PERMISSION_READ: u64 = 4;
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pub const CA_FORMAT_ACL_PERMISSION_WRITE: u64 = 2;
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pub const CA_FORMAT_ACL_PERMISSION_EXECUTE: u64 = 1;
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/// Create SipHash values for goodby tables.
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//pub fn compute_goodbye_hash(name: &std::ffi::CStr) -> u64 {
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pub fn compute_goodbye_hash(name: &[u8]) -> u64 {
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