On Tue, Mar 06, 2018 at 02:15:53PM +0100, Michal Suchanek wrote:
> It is parsed separately to save a few CPU cycles when setting up other
> options but it just complicates the code. So fold it back and set up all
> flags both for KEXEC_LOAD and KEXEC_FILE_LOAD
>
> Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx>
> ---
> kexec/kexec.c | 25 ++++---------------------
> 1 file changed, 4 insertions(+), 21 deletions(-)
>
> diff --git a/kexec/kexec.c b/kexec/kexec.c
> index ab8cff7fe083..9ea102e1565a 100644
> --- a/kexec/kexec.c
> +++ b/kexec/kexec.c
> @@ -1256,19 +1256,6 @@ int main(int argc, char *argv[])
> };
> static const char short_options[] = KEXEC_ALL_OPT_STR;
>
> - /*
> - * First check if --use-kexec-file-syscall is set. That changes lot of
> - * things
> - */
> - while ((opt = getopt_long(argc, argv, short_options,
> - options, 0)) != -1) {
> - switch(opt) {
> - case OPT_KEXEC_FILE_SYSCALL:
> - do_kexec_file_syscall = 1;
> - break;
> - }
> - }
> -
> /* Reset getopt for the next pass. */
> opterr = 1;
> optind = 1;
> @@ -1310,8 +1297,7 @@ int main(int argc, char *argv[])
> do_shutdown = 0;
> do_sync = 0;
> do_unload = 1;
> - if (do_kexec_file_syscall)
> - kexec_file_flags |= KEXEC_FILE_UNLOAD;
> + kexec_file_flags |= KEXEC_FILE_UNLOAD;
> break;
> case OPT_EXEC:
> do_load = 0;
@@ -1354,11 +1340,8 @@ int main(int argc, char *argv[])
The existing code has the following above the context shown in the patch:
do_load = 1;
> do_exec = 0;
> do_shutdown = 0;
> do_sync = 0;
> - if (do_kexec_file_syscall)
> - kexec_file_flags |= KEXEC_FILE_ON_CRASH;
> - else
> - kexec_flags = KEXEC_ON_CRASH;
> - break;
> + kexec_file_flags |= KEXEC_FILE_ON_CRASH;
> + kexec_flags = KEXEC_ON_CRASH;
kexec_flags is now set regardless of the value of do_kexec_file_syscall,
which was not the case prior to this patch. That seems to affect the
following which appears later in the function. Is that ok?
if (do_load && (kexec_flags & KEXEC_ON_CRASH) &&
!is_crashkernel_mem_reserved()) {
die("Memory for crashkernel is not reserved\n"
"Please reserve memory by passing"
"\"crashkernel=X@Y\" parameter to kernel\n"
"Then try to loading kdump kernel\n");
}
...
if ((result == 0) && do_load_jump_back_helper) {
result = my_load_jump_back_helper(kexec_flags, entry);
}
> case OPT_MEM_MIN:
> mem_min = strtoul(optarg, &endptr, 0);
> if (*endptr) {
> @@ -1383,7 +1366,7 @@ int main(int argc, char *argv[])
> do_reuse_initrd = 1;
> break;
> case OPT_KEXEC_FILE_SYSCALL:
> - /* We already parsed it. Nothing to do. */
> + do_kexec_file_syscall = 1;
> break;
> case OPT_STATUS:
> do_status = 1;
> --
> 2.13.6
>
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