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linux_like: Unify statx definitions
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The statx system call and corresponding constants are defined by the
Linux kernel and don't depend on the libc or architecture. The only
difference is whether a libc exports the statx syscall wrapper or not.

We can thus unify the statx definitions for all Linux "like" platforms:
GNU (glibc), Android (bionic), and (in a later commit) musl.

Plain u64 (or uint64_t in C) can't be used for the statx fields because
bionic defines them as __u64, and provides incompatible definitions of
uint64_t and __u64.
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@neuschaefer
neuschaefer committed Nov 22, 2024
1 parent 294a882 commit e46bbe4
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Showing 3 changed files with 89 additions and 111 deletions.
40 changes: 0 additions & 40 deletions src/unix/linux_like/android/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -515,39 +515,6 @@ s! {
pub ifr6_prefixlen: u32,
pub ifr6_ifindex: ::c_int,
}

pub struct statx {
pub stx_mask: ::__u32,
pub stx_blksize: ::__u32,
pub stx_attributes: ::__u64,
pub stx_nlink: ::__u32,
pub stx_uid: ::__u32,
pub stx_gid: ::__u32,
pub stx_mode: ::__u16,
__statx_pad1: [::__u16; 1],
pub stx_ino: ::__u64,
pub stx_size: ::__u64,
pub stx_blocks: ::__u64,
pub stx_attributes_mask: ::__u64,
pub stx_atime: ::statx_timestamp,
pub stx_btime: ::statx_timestamp,
pub stx_ctime: ::statx_timestamp,
pub stx_mtime: ::statx_timestamp,
pub stx_rdev_major: ::__u32,
pub stx_rdev_minor: ::__u32,
pub stx_dev_major: ::__u32,
pub stx_dev_minor: ::__u32,
pub stx_mnt_id: ::__u64,
pub stx_dio_mem_align: ::__u32,
pub stx_dio_offset_align: ::__u32,
__statx_pad3: [::__u64; 12],
}

pub struct statx_timestamp {
pub tv_sec: ::__s64,
pub tv_nsec: ::__u32,
pub __reserved: ::__s32,
}
}

s_no_extra_traits! {
Expand Down Expand Up @@ -4163,13 +4130,6 @@ extern "C" {
newpath: *const ::c_char,
flags: ::c_uint,
) -> ::c_int;
pub fn statx(
dirfd: ::c_int,
pathname: *const c_char,
flags: ::c_int,
mask: ::c_uint,
statxbuf: *mut statx,
) -> ::c_int;
}

cfg_if! {
Expand Down
71 changes: 0 additions & 71 deletions src/unix/linux_like/linux/gnu/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,39 +16,6 @@ cfg_if! {
}

s! {
pub struct statx {
pub stx_mask: u32,
pub stx_blksize: u32,
pub stx_attributes: u64,
pub stx_nlink: u32,
pub stx_uid: u32,
pub stx_gid: u32,
pub stx_mode: u16,
__statx_pad1: [u16; 1],
pub stx_ino: u64,
pub stx_size: u64,
pub stx_blocks: u64,
pub stx_attributes_mask: u64,
pub stx_atime: ::statx_timestamp,
pub stx_btime: ::statx_timestamp,
pub stx_ctime: ::statx_timestamp,
pub stx_mtime: ::statx_timestamp,
pub stx_rdev_major: u32,
pub stx_rdev_minor: u32,
pub stx_dev_major: u32,
pub stx_dev_minor: u32,
pub stx_mnt_id: u64,
pub stx_dio_mem_align: u32,
pub stx_dio_offset_align: u32,
__statx_pad3: [u64; 12],
}

pub struct statx_timestamp {
pub tv_sec: i64,
pub tv_nsec: u32,
pub __statx_timestamp_pad1: [i32; 1],
}

pub struct aiocb {
pub aio_fildes: ::c_int,
pub aio_lio_opcode: ::c_int,
Expand Down Expand Up @@ -1168,37 +1135,6 @@ pub const M_PERTURB: ::c_int = -6;
pub const M_ARENA_TEST: ::c_int = -7;
pub const M_ARENA_MAX: ::c_int = -8;

pub const AT_STATX_SYNC_TYPE: ::c_int = 0x6000;
pub const AT_STATX_SYNC_AS_STAT: ::c_int = 0x0000;
pub const AT_STATX_FORCE_SYNC: ::c_int = 0x2000;
pub const AT_STATX_DONT_SYNC: ::c_int = 0x4000;
pub const STATX_TYPE: ::c_uint = 0x0001;
pub const STATX_MODE: ::c_uint = 0x0002;
pub const STATX_NLINK: ::c_uint = 0x0004;
pub const STATX_UID: ::c_uint = 0x0008;
pub const STATX_GID: ::c_uint = 0x0010;
pub const STATX_ATIME: ::c_uint = 0x0020;
pub const STATX_MTIME: ::c_uint = 0x0040;
pub const STATX_CTIME: ::c_uint = 0x0080;
pub const STATX_INO: ::c_uint = 0x0100;
pub const STATX_SIZE: ::c_uint = 0x0200;
pub const STATX_BLOCKS: ::c_uint = 0x0400;
pub const STATX_BASIC_STATS: ::c_uint = 0x07ff;
pub const STATX_BTIME: ::c_uint = 0x0800;
pub const STATX_MNT_ID: ::c_uint = 0x1000;
pub const STATX_DIOALIGN: ::c_uint = 0x2000;
pub const STATX_ALL: ::c_uint = 0x0fff;
pub const STATX__RESERVED: ::c_int = 0x80000000;
pub const STATX_ATTR_COMPRESSED: ::c_int = 0x0004;
pub const STATX_ATTR_IMMUTABLE: ::c_int = 0x0010;
pub const STATX_ATTR_APPEND: ::c_int = 0x0020;
pub const STATX_ATTR_NODUMP: ::c_int = 0x0040;
pub const STATX_ATTR_ENCRYPTED: ::c_int = 0x0800;
pub const STATX_ATTR_AUTOMOUNT: ::c_int = 0x1000;
pub const STATX_ATTR_MOUNT_ROOT: ::c_int = 0x2000;
pub const STATX_ATTR_VERITY: ::c_int = 0x00100000;
pub const STATX_ATTR_DAX: ::c_int = 0x00200000;

pub const SOMAXCONN: ::c_int = 4096;

// linux/mount.h
Expand Down Expand Up @@ -1404,13 +1340,6 @@ extern "C" {
pub fn getpt() -> ::c_int;
pub fn mallopt(param: ::c_int, value: ::c_int) -> ::c_int;
pub fn gettimeofday(tp: *mut ::timeval, tz: *mut ::timezone) -> ::c_int;
pub fn statx(
dirfd: ::c_int,
pathname: *const c_char,
flags: ::c_int,
mask: ::c_uint,
statxbuf: *mut statx,
) -> ::c_int;
pub fn getentropy(buf: *mut ::c_void, buflen: ::size_t) -> ::c_int;
pub fn getrandom(buf: *mut ::c_void, buflen: ::size_t, flags: ::c_uint) -> ::ssize_t;
pub fn getauxval(type_: ::c_ulong) -> ::c_ulong;
Expand Down
89 changes: 89 additions & 0 deletions src/unix/linux_like/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -205,6 +205,45 @@ s! {
}
}

cfg_if! {
if #[cfg(any(target_env = "gnu", target_os = "android"))] {
s! {
pub struct statx {
pub stx_mask: ::__u32,
pub stx_blksize: ::__u32,
pub stx_attributes: ::__u64,
pub stx_nlink: ::__u32,
pub stx_uid: ::__u32,
pub stx_gid: ::__u32,
pub stx_mode: ::__u16,
__statx_pad1: [::__u16; 1],
pub stx_ino: ::__u64,
pub stx_size: ::__u64,
pub stx_blocks: ::__u64,
pub stx_attributes_mask: ::__u64,
pub stx_atime: statx_timestamp,
pub stx_btime: statx_timestamp,
pub stx_ctime: statx_timestamp,
pub stx_mtime: statx_timestamp,
pub stx_rdev_major: ::__u32,
pub stx_rdev_minor: ::__u32,
pub stx_dev_major: ::__u32,
pub stx_dev_minor: ::__u32,
pub stx_mnt_id: ::__u64,
pub stx_dio_mem_align: ::__u32,
pub stx_dio_offset_align: ::__u32,
__statx_pad3: [::__u64; 12],
}

pub struct statx_timestamp {
pub tv_sec: ::__s64,
pub tv_nsec: ::__u32,
__statx_timestamp_pad1: [::__s32; 1],
}
}
}
}

s_no_extra_traits! {
#[cfg_attr(
any(
Expand Down Expand Up @@ -1529,6 +1568,41 @@ cfg_if! {
}
}

cfg_if! {
if #[cfg(any(target_env = "gnu", target_os = "android"))] {
pub const AT_STATX_SYNC_TYPE: ::c_int = 0x6000;
pub const AT_STATX_SYNC_AS_STAT: ::c_int = 0x0000;
pub const AT_STATX_FORCE_SYNC: ::c_int = 0x2000;
pub const AT_STATX_DONT_SYNC: ::c_int = 0x4000;
pub const STATX_TYPE: ::c_uint = 0x0001;
pub const STATX_MODE: ::c_uint = 0x0002;
pub const STATX_NLINK: ::c_uint = 0x0004;
pub const STATX_UID: ::c_uint = 0x0008;
pub const STATX_GID: ::c_uint = 0x0010;
pub const STATX_ATIME: ::c_uint = 0x0020;
pub const STATX_MTIME: ::c_uint = 0x0040;
pub const STATX_CTIME: ::c_uint = 0x0080;
pub const STATX_INO: ::c_uint = 0x0100;
pub const STATX_SIZE: ::c_uint = 0x0200;
pub const STATX_BLOCKS: ::c_uint = 0x0400;
pub const STATX_BASIC_STATS: ::c_uint = 0x07ff;
pub const STATX_BTIME: ::c_uint = 0x0800;
pub const STATX_ALL: ::c_uint = 0x0fff;
pub const STATX_MNT_ID: ::c_uint = 0x1000;
pub const STATX_DIOALIGN: ::c_uint = 0x2000;
pub const STATX__RESERVED: ::c_int = 0x80000000;
pub const STATX_ATTR_COMPRESSED: ::c_int = 0x0004;
pub const STATX_ATTR_IMMUTABLE: ::c_int = 0x0010;
pub const STATX_ATTR_APPEND: ::c_int = 0x0020;
pub const STATX_ATTR_NODUMP: ::c_int = 0x0040;
pub const STATX_ATTR_ENCRYPTED: ::c_int = 0x0800;
pub const STATX_ATTR_AUTOMOUNT: ::c_int = 0x1000;
pub const STATX_ATTR_MOUNT_ROOT: ::c_int = 0x2000;
pub const STATX_ATTR_VERITY: ::c_int = 0x100000;
pub const STATX_ATTR_DAX: ::c_int = 0x200000;
}
}

const_fn! {
{const} fn CMSG_ALIGN(len: usize) -> usize {
len + ::mem::size_of::<usize>() - 1 & !(::mem::size_of::<usize>() - 1)
Expand Down Expand Up @@ -1888,6 +1962,21 @@ cfg_if! {
}
}

// The statx syscall, available on some libcs.
cfg_if! {
if #[cfg(any(target_env = "gnu", target_os = "android"))] {
extern "C" {
pub fn statx(
dirfd: ::c_int,
pathname: *const ::c_char,
flags: ::c_int,
mask: ::c_uint,
statxbuf: *mut statx,
) -> ::c_int;
}
}
}

cfg_if! {
if #[cfg(target_os = "emscripten")] {
mod emscripten;
Expand Down

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