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authorStanislav Fomichev <sdf@google.com>2020-12-02 20:49:47 +0300
committerAlexei Starovoitov <ast@kernel.org>2020-12-03 21:22:45 +0300
commita874c8c389a12b9f5ab67ba01995f06bf82e94fe (patch)
treea8d69545f9e94a6b2ea3d176617161ef356e7999
parent0d1e02695979bdf5fb08425cd823d6e906e09378 (diff)
downloadlinux-a874c8c389a12b9f5ab67ba01995f06bf82e94fe.tar.xz
selftests/bpf: Copy file using read/write in local storage test
Splice (copy_file_range) doesn't work on all filesystems. I'm running test kernels on top of my read-only disk image and it uses plan9 under the hood. This prevents test_local_storage from successfully passing. There is really no technical reason to use splice, so lets do old-school read/write to copy file; this should work in all environments. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201202174947.3621989-1-sdf@google.com
-rw-r--r--tools/testing/selftests/bpf/prog_tests/test_local_storage.c28
1 files changed, 18 insertions, 10 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/test_local_storage.c b/tools/testing/selftests/bpf/prog_tests/test_local_storage.c
index fcca7ba1f368..c0fe73a17ed1 100644
--- a/tools/testing/selftests/bpf/prog_tests/test_local_storage.c
+++ b/tools/testing/selftests/bpf/prog_tests/test_local_storage.c
@@ -21,14 +21,6 @@ static inline int sys_pidfd_open(pid_t pid, unsigned int flags)
return syscall(__NR_pidfd_open, pid, flags);
}
-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)
-{
- return syscall(__NR_copy_file_range, fd_in, off_in, fd_out, off_out,
- len, flags);
-}
-
static unsigned int duration;
#define TEST_STORAGE_VALUE 0xbeefdead
@@ -47,6 +39,7 @@ static int copy_rm(char *dest)
{
int fd_in, fd_out = -1, ret = 0;
struct stat stat;
+ char *buf = NULL;
fd_in = open("/bin/rm", O_RDONLY);
if (fd_in < 0)
@@ -64,18 +57,33 @@ static int copy_rm(char *dest)
goto out;
}
- ret = copy_file_range(fd_in, NULL, fd_out, NULL, stat.st_size, 0);
- if (ret == -1) {
+ buf = malloc(stat.st_blksize);
+ if (!buf) {
ret = -errno;
goto out;
}
+ while (ret = read(fd_in, buf, stat.st_blksize), ret > 0) {
+ ret = write(fd_out, buf, ret);
+ if (ret < 0) {
+ ret = -errno;
+ goto out;
+
+ }
+ }
+ if (ret < 0) {
+ ret = -errno;
+ goto out;
+
+ }
+
/* Set executable permission on the copied file */
ret = chmod(dest, 0100);
if (ret == -1)
ret = -errno;
out:
+ free(buf);
close(fd_in);
close(fd_out);
return ret;