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zkey: Move utility functions into separate source file

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As preparation for future changes, move a sysfs specific functions
into a separate source file (utils.c).

Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Ingo Franzki
2019-06-13 10:10:29 +02:00
committed by Jan Höppner
parent 95c7258ea7
commit 696e8458f0
4 changed files with 136 additions and 68 deletions
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zkey/utils.c
+109
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@@ -0,0 +1,109 @@
/*
* zkey - Generate, re-encipher, and validate secure keys
*
* Copyright IBM Corp. 2019
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#include <err.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <unistd.h>
#include "lib/util_path.h"
#include "lib/util_file.h"
#include "utils.h"
/**
* Checks if the specified card is of type CCA and is online
*
* @param[in] card card number
*
* @returns 1 if its a CCA card and is online, 0 if offline and -1 if its
* not a CCA card.
*/
int sysfs_is_card_online(int card)
{
long int online;
char *dev_path;
char type[20];
int rc = 1;
dev_path = util_path_sysfs("bus/ap/devices/card%02x", card);
if (!util_path_is_dir(dev_path)) {
rc = 0;
goto out;
}
if (util_file_read_l(&online, 10, "%s/online", dev_path) != 0) {
rc = 0;
goto out;
}
if (online == 0) {
rc = 0;
goto out;
}
if (util_file_read_line(type, sizeof(type), "%s/type", dev_path) != 0) {
rc = 0;
goto out;
}
if (strncmp(type, "CEX", 3) != 0 || strlen(type) < 5) {
rc = 0;
goto out;
}
if (type[4] != 'C') {
rc = -1;
goto out;
}
out:
free(dev_path);
return rc;
}
/**
* Checks if the specified APQN is of type CCA and is online
*
* @param[in] card card number
* @param[in] domain the domain
*
* @returns 1 if its a CCA card and is online, 0 if offline and -1 if its
* not a CCA card.
*/
int sysfs_is_apqn_online(int card, int domain)
{
long int online;
char *dev_path;
int rc = 1;
rc = sysfs_is_card_online(card);
if (rc != 1)
return rc;
dev_path = util_path_sysfs("bus/ap/devices/card%02x/%02x.%04x", card,
card, domain);
if (!util_path_is_dir(dev_path)) {
rc = 0;
goto out;
}
if (util_file_read_l(&online, 10, "%s/online", dev_path) != 0) {
rc = 0;
goto out;
}
if (online == 0) {
rc = 0;
goto out;
}
out:
free(dev_path);
return rc;
}