diff options
Diffstat (limited to '')
-rw-r--r-- | kernel/kexec_file.c | 60 |
1 files changed, 56 insertions, 4 deletions
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index ab1dced677fd..332c4fd12cb1 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -28,28 +28,80 @@ static int kexec_calculate_store_digests(struct kimage *image); +/* + * Currently this is the only default function that is exported as some + * architectures need it to do additional handlings. + * In the future, other default functions may be exported too if required. + */ +int kexec_image_probe_default(struct kimage *image, void *buf, + unsigned long buf_len) +{ + const struct kexec_file_ops * const *fops; + int ret = -ENOEXEC; + + for (fops = &kexec_file_loaders[0]; *fops && (*fops)->probe; ++fops) { + ret = (*fops)->probe(buf, buf_len); + if (!ret) { + image->fops = *fops; + return ret; + } + } + + return ret; +} + /* Architectures can provide this probe function */ int __weak arch_kexec_kernel_image_probe(struct kimage *image, void *buf, unsigned long buf_len) { - return -ENOEXEC; + return kexec_image_probe_default(image, buf, buf_len); +} + +static void *kexec_image_load_default(struct kimage *image) +{ + if (!image->fops || !image->fops->load) + return ERR_PTR(-ENOEXEC); + + return image->fops->load(image, image->kernel_buf, + image->kernel_buf_len, image->initrd_buf, + image->initrd_buf_len, image->cmdline_buf, + image->cmdline_buf_len); } void * __weak arch_kexec_kernel_image_load(struct kimage *image) { - return ERR_PTR(-ENOEXEC); + return kexec_image_load_default(image); +} + +static int kexec_image_post_load_cleanup_default(struct kimage *image) +{ + if (!image->fops || !image->fops->cleanup) + return 0; + + return image->fops->cleanup(image->image_loader_data); } int __weak arch_kimage_file_post_load_cleanup(struct kimage *image) { - return -EINVAL; + return kexec_image_post_load_cleanup_default(image); } #ifdef CONFIG_KEXEC_VERIFY_SIG +static int kexec_image_verify_sig_default(struct kimage *image, void *buf, + unsigned long buf_len) +{ + if (!image->fops || !image->fops->verify_sig) { + pr_debug("kernel loader does not support signature verification.\n"); + return -EKEYREJECTED; + } + + return image->fops->verify_sig(buf, buf_len); +} + int __weak arch_kexec_kernel_verify_sig(struct kimage *image, void *buf, unsigned long buf_len) { - return -EKEYREJECTED; + return kexec_image_verify_sig_default(image, buf, buf_len); } #endif |