linux: add new flags for pwritev2/preadv2

(backport <#4452>)
(cherry picked from commit 6e7549d)

Author: the8472

libc-test/build.rs

@@ -4542,6 +4542,15 @@ fn test_linux(target: &str) {
             // kernel 6.2 minimum
             "TUN_F_USO4" | "TUN_F_USO6" | "IFF_NO_CARRIER" => true,
 
+            // kernel 6.9 minimum
+            "RWF_NOAPPEND" => true,
+
+            // kernel 6.11 minimum
+            "RWF_ATOMIC" => true,
+
+            // kernel 6.14 minimum
+            "RWF_DONTCACHE" => true,
+
             // FIXME(linux): Requires more recent kernel headers
             | "IFLA_PARENT_DEV_NAME"     // linux v5.13+
             | "IFLA_PARENT_DEV_BUS_NAME" // linux v5.13+

libc-test/semver/linux-gnu.txt

@@ -389,8 +389,11 @@ RTM_NEWCACHEREPORT
 RTM_NEWSTATS
 RUN_LVL
 RWF_APPEND
+RWF_ATOMIC
+RWF_DONTCACHE
 RWF_DSYNC
 RWF_HIPRI
+RWF_NOAPPEND
 RWF_NOWAIT
 RWF_SYNC
 SECURITYFS_MAGIC

libc-test/semver/linux-musl.txt

@@ -32,8 +32,11 @@ PR_SET_VMA
 PR_SET_VMA_ANON_NAME
 RUN_LVL
 RWF_APPEND
+RWF_ATOMIC
+RWF_DONTCACHE
 RWF_DSYNC
 RWF_HIPRI
+RWF_NOAPPEND
 RWF_NOWAIT
 RWF_SYNC
 USER_PROCESS

src/unix/linux_like/linux/gnu/mod.rs

@@ -942,15 +942,6 @@ pub const PTRACE_SYSCALL_INFO_SECCOMP: crate::__u8 = 3;
 pub const PTRACE_SET_SYSCALL_USER_DISPATCH_CONFIG: crate::__u8 = 0x4210;
 pub const PTRACE_GET_SYSCALL_USER_DISPATCH_CONFIG: crate::__u8 = 0x4211;
 
-// linux/fs.h
-
-// Flags for preadv2/pwritev2
-pub const RWF_HIPRI: c_int = 0x00000001;
-pub const RWF_DSYNC: c_int = 0x00000002;
-pub const RWF_SYNC: c_int = 0x00000004;
-pub const RWF_NOWAIT: c_int = 0x00000008;
-pub const RWF_APPEND: c_int = 0x00000010;
-
 // linux/rtnetlink.h
 pub const TCA_PAD: c_ushort = 9;
 pub const TCA_DUMP_INVISIBLE: c_ushort = 10;

src/unix/linux_like/linux/mod.rs

@@ -2897,6 +2897,18 @@ pub const IFA_F_NOPREFIXROUTE: u32 = 0x200;
 pub const IFA_F_MCAUTOJOIN: u32 = 0x400;
 pub const IFA_F_STABLE_PRIVACY: u32 = 0x800;
 
+// linux/fs.h
+
+// Flags for preadv2/pwritev2
+pub const RWF_HIPRI: c_int = 0x00000001;
+pub const RWF_DSYNC: c_int = 0x00000002;
+pub const RWF_SYNC: c_int = 0x00000004;
+pub const RWF_NOWAIT: c_int = 0x00000008;
+pub const RWF_APPEND: c_int = 0x00000010;
+pub const RWF_NOAPPEND: c_int = 0x00000020;
+pub const RWF_ATOMIC: c_int = 0x00000040;
+pub const RWF_DONTCACHE: c_int = 0x00000080;
+
 // linux/if_link.h
 pub const IFLA_UNSPEC: c_ushort = 0;
 pub const IFLA_ADDRESS: c_ushort = 1;

src/unix/linux_like/linux/musl/mod.rs

@@ -747,12 +747,6 @@ pub const PTRACE_PEEKSIGINFO: c_int = 0x4209;
 pub const PTRACE_GETSIGMASK: c_uint = 0x420a;
 pub const PTRACE_SETSIGMASK: c_uint = 0x420b;
 
-pub const RWF_HIPRI: c_int = 0x00000001;
-pub const RWF_DSYNC: c_int = 0x00000002;
-pub const RWF_SYNC: c_int = 0x00000004;
-pub const RWF_NOWAIT: c_int = 0x00000008;
-pub const RWF_APPEND: c_int = 0x00000010;
-
 pub const AF_IB: c_int = 27;
 pub const AF_MPLS: c_int = 28;
 pub const AF_NFC: c_int = 39;