On Thu, Aug 14, 2014 at 10:46:29AM +0800, Baoquan He wrote:
> On 08/13/14 at 11:06am, Vivek Goyal wrote:
> > +/* New file based kexec system call related code */
> > +static int do_kexec_file_load(int fileind, int argc, char **argv,
> > + unsigned long flags) {
> > +
> > + char *kernel;
>
> ........
>
> > + kernel_fd = open(kernel, O_RDONLY);
> > + if (kernel_fd == -1) {
> > + fprintf(stderr, "Failed to open file %s:%s\n", kernel,
> > + strerror(errno));
> > + return -1;
> > + }
> > +
> > + /* slurp in the input kernel */
> > + kernel_buf = slurp_decompress_file(kernel, &kernel_size);
> > +
> > + for (i = 0; i < file_types; i++) {
> > + if (file_type[i].probe(kernel_buf, kernel_size) >= 0)
> > + break;
> > + }
> > +
> > + if (i == file_types) {
> > + fprintf(stderr, "Cannot determine the file type " "of %s\n",
> > + kernel);
> > + return -1;
> > + }
> > +
> > + ret = file_type[i].load(argc, argv, kernel_buf, kernel_size, &info);
> > + if (ret < 0) {
> > + fprintf(stderr, "Cannot load %s\n", kernel);
> > + return ret;
> > + }
> > +
> > + if (!is_kexec_file_load_implemented()) {
>
> Hi Vivek,
>
> Can we put this check earlier, maybe before kernel file openning? Since
> if this syscall is not implemented, we don't have to do the opening or
> loading things.
>
Ok, will do it.
Thanks
Vivek
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