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https://github.com/ibm-s390-linux/s390-tools.git
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696e8458f0
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>
110 lines
2.0 KiB
C
110 lines
2.0 KiB
C
/*
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* zkey - Generate, re-encipher, and validate secure keys
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*
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* Copyright IBM Corp. 2019
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#include <err.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "lib/util_path.h"
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#include "lib/util_file.h"
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#include "utils.h"
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/**
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* Checks if the specified card is of type CCA and is online
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*
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* @param[in] card card number
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*
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* @returns 1 if its a CCA card and is online, 0 if offline and -1 if its
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* not a CCA card.
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*/
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int sysfs_is_card_online(int card)
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{
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long int online;
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char *dev_path;
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char type[20];
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int rc = 1;
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dev_path = util_path_sysfs("bus/ap/devices/card%02x", card);
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if (!util_path_is_dir(dev_path)) {
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rc = 0;
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goto out;
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}
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if (util_file_read_l(&online, 10, "%s/online", dev_path) != 0) {
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rc = 0;
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goto out;
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}
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if (online == 0) {
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rc = 0;
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goto out;
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}
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if (util_file_read_line(type, sizeof(type), "%s/type", dev_path) != 0) {
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rc = 0;
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goto out;
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}
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if (strncmp(type, "CEX", 3) != 0 || strlen(type) < 5) {
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rc = 0;
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goto out;
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}
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if (type[4] != 'C') {
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rc = -1;
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goto out;
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}
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out:
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free(dev_path);
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return rc;
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}
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/**
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* Checks if the specified APQN is of type CCA and is online
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*
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* @param[in] card card number
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* @param[in] domain the domain
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*
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* @returns 1 if its a CCA card and is online, 0 if offline and -1 if its
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* not a CCA card.
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*/
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int sysfs_is_apqn_online(int card, int domain)
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{
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long int online;
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char *dev_path;
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int rc = 1;
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rc = sysfs_is_card_online(card);
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if (rc != 1)
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return rc;
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dev_path = util_path_sysfs("bus/ap/devices/card%02x/%02x.%04x", card,
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card, domain);
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if (!util_path_is_dir(dev_path)) {
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rc = 0;
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goto out;
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}
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if (util_file_read_l(&online, 10, "%s/online", dev_path) != 0) {
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rc = 0;
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goto out;
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}
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if (online == 0) {
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rc = 0;
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goto out;
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}
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out:
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free(dev_path);
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return rc;
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}
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