Function dumper_insert

freebsd/kern/kern_shutdown.c:1189–1271

Registration of dumpers */

/* Registration of dumpers */
int
dumper_insert(const struct dumperinfo *di_template, const char *devname,
    const struct diocskerneldump_arg *kda)
{
	struct dumperinfo *newdi, *listdi;
	bool inserted;
	uint8_t index;
	int error;

	index = kda->kda_index;
	MPASS(index != KDA_REMOVE && index != KDA_REMOVE_DEV &&
	    index != KDA_REMOVE_ALL);

	error = priv_check(curthread, PRIV_SETDUMPER);
	if (error != 0)
		return (error);

	newdi = malloc(sizeof(*newdi) + strlen(devname) + 1, M_DUMPER, M_WAITOK
	    | M_ZERO);
	memcpy(newdi, di_template, sizeof(*newdi));
	newdi->blockbuf = NULL;
	newdi->kdcrypto = NULL;
	newdi->kdcomp = NULL;
	strcpy(newdi->di_devname, devname);

	if (kda->kda_encryption != KERNELDUMP_ENC_NONE) {
#ifdef EKCD
		newdi->kdcrypto = kerneldumpcrypto_create(di_template->blocksize,
		    kda->kda_encryption, kda->kda_key,
		    kda->kda_encryptedkeysize, kda->kda_encryptedkey);
		if (newdi->kdcrypto == NULL) {
			error = EINVAL;
			goto cleanup;
		}
#else
		error = EOPNOTSUPP;
		goto cleanup;
#endif
	}
	if (kda->kda_compression != KERNELDUMP_COMP_NONE) {
#ifdef EKCD
		/*
		 * We can't support simultaneous unpadded block cipher
		 * encryption and compression because there is no guarantee the
		 * length of the compressed result is exactly a multiple of the
		 * cipher block size.
		 */
		if (kda->kda_encryption == KERNELDUMP_ENC_AES_256_CBC) {
			error = EOPNOTSUPP;
			goto cleanup;
		}
#endif
		newdi->kdcomp = kerneldumpcomp_create(newdi,
		    kda->kda_compression);
		if (newdi->kdcomp == NULL) {
			error = EINVAL;
			goto cleanup;
		}