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| author | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2016-03-15 19:26:30 -0400 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2016-03-17 13:02:18 -0400 |
| commit | 1d4b557d1b5cd200b27562808c690653658ffadf (patch) | |
| tree | 0f49973729ab79de05e5522a2c8e88af26d5fbf1 | |
| parent | 7a827fcb115b6e03e351599db76f247e199d6351 (diff) | |
| download | systemd-1d4b557d1b5cd200b27562808c690653658ffadf.tar.gz | |
basic/missing: add copy_file_range
syscall numbers based on:
https://fedora.juszkiewicz.com.pl/syscalls.html
| -rw-r--r-- | configure.ac | 15 | ||||
| -rw-r--r-- | src/basic/missing.h | 30 |
2 files changed, 43 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index 79340bcca9..cb14abda05 100644 --- a/configure.ac +++ b/configure.ac @@ -296,8 +296,19 @@ LIBS="$save_LIBS" AC_SUBST(CAP_LIBS) AC_CHECK_FUNCS([__secure_getenv secure_getenv]) -AC_CHECK_DECLS([memfd_create, gettid, pivot_root, name_to_handle_at, setns, getrandom, renameat2, kcmp, keyctl, LO_FLAGS_PARTSCAN], - [], [], [[ +AC_CHECK_DECLS([ + memfd_create, + gettid, + pivot_root, + name_to_handle_at, + setns, + getrandom, + renameat2, + kcmp, + keyctl, + LO_FLAGS_PARTSCAN, + copy_file_range], + [], [], [[ #include <sys/types.h> #include <unistd.h> #include <sys/mount.h> diff --git a/src/basic/missing.h b/src/basic/missing.h index 417604aa64..bdea7606e6 100644 --- a/src/basic/missing.h +++ b/src/basic/missing.h @@ -1177,3 +1177,33 @@ static inline key_serial_t request_key(const char *type, const char *description #endif #endif + +#ifndef __NR_copy_file_range +# if defined(__x86_64__) +# define __NR_copy_file_range 326 +# elif defined(__i386__) +# define __NR_copy_file_range 377 +# elif defined __s390__ +# define __NR_copy_file_range 375 +# elif defined __arm__ +# define __NR_copy_file_range 391 +# elif defined __aarch64__ +# define __NR_copy_file_range 285 +# else +# warning "__NR_copy_file_range not defined for your architecture" +# endif +#endif + +#if !HAVE_DECL_COPY_FILE_RANGE +static inline ssize_t copy_file_range(int fd_in, loff_t *off_in, + int fd_out, loff_t *off_out, + size_t len, + unsigned int flags) { +#ifdef __NR_copy_file_range + return syscall(__NR_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags); +#else + errno = ENOSYS; + return -1; +#endif +} +#endif |