[V2] dmicheck: skip scanning smbios in /dev/mem on aarch64

Buglink: https://bugs.launchpad.net/bugs/1947786

Signed-off-by: Alex Hung <alex.hung@canonical.com>
---
 src/dmi/dmicheck/dmicheck.c   | 10 +++++
 src/lib/include/fwts.h        |  1 +
 src/lib/include/fwts_kernel.h | 25 ++++++++++++
 src/lib/src/Makefile.am       |  1 +
 src/lib/src/fwts_kernel.c     | 74 +++++++++++++++++++++++++++++++++++
 5 files changed, 111 insertions(+)
 create mode 100644 src/lib/include/fwts_kernel.h
 create mode 100644 src/lib/src/fwts_kernel.c

Looks good to me. Thanks, Alex.
Reviewed-by: Sunny Wang <sunny.wang@arm.com>

-----Original Message-----
From: Alex Hung <alex.hung@canonical.com>
Sent: 10 November 2021 20:25
To: fwts-devel@lists.ubuntu.com; Sunny Wang <Sunny.Wang@arm.com>; G Edhaya Chandran <Edhaya.Chandran@arm.com>
Cc: Alex Hung <alex.hung@canonical.com>
Subject: [PATCH][V2] dmicheck: skip scanning smbios in /dev/mem on aarch64

Buglink: https://bugs.launchpad.net/bugs/1947786

Signed-off-by: Alex Hung <alex.hung@canonical.com>
---
 src/dmi/dmicheck/dmicheck.c   | 10 +++++
 src/lib/include/fwts.h        |  1 +
 src/lib/include/fwts_kernel.h | 25 ++++++++++++
 src/lib/src/Makefile.am       |  1 +
 src/lib/src/fwts_kernel.c     | 74 +++++++++++++++++++++++++++++++++++
 5 files changed, 111 insertions(+)
 create mode 100644 src/lib/include/fwts_kernel.h
 create mode 100644 src/lib/src/fwts_kernel.c

diff --git a/src/dmi/dmicheck/dmicheck.c b/src/dmi/dmicheck/dmicheck.c
index 7f6a90c4..67715687 100644
--- a/src/dmi/dmicheck/dmicheck.c
+++ b/src/dmi/dmicheck/dmicheck.c
@@ -381,6 +381,11 @@ static void* dmi_table_smbios(fwts_framework *fw, fwts_smbios_entry *entry)
                free(table);
        }

+#ifdef FWTS_ARCH_AARCH64
+       if (fwts_kernel_config_set("CONFIG_STRICT_DEVMEM"))
+               return NULL;
+#endif
+
        mem = fwts_mmap(addr, length);
        if (mem != FWTS_MAP_FAILED) {
                /* Can we safely copy the table? */
@@ -429,6 +434,11 @@ static void* dmi_table_smbios30(fwts_framework *fw, fwts_smbios30_entry *entry)
                free(table);
        }

+#ifdef FWTS_ARCH_AARCH64
+       if (fwts_kernel_config_set("CONFIG_STRICT_DEVMEM"))
+               return NULL;
+#endif
+
        mem = fwts_mmap(addr, length);
        if (mem != FWTS_MAP_FAILED) {
                /* Can we safely copy the table? */
diff --git a/src/lib/include/fwts.h b/src/lib/include/fwts.h
index 551a4e09..be754a99 100644
--- a/src/lib/include/fwts.h
+++ b/src/lib/include/fwts.h
@@ -185,6 +185,7 @@
 #include "fwts_iasl.h"
 #include "fwts_ipmi.h"
 #include "fwts_klog.h"
+#include "fwts_kernel.h"
 #include "fwts_olog.h"
 #include "fwts_pipeio.h"
 #include "fwts_stringextras.h"
diff --git a/src/lib/include/fwts_kernel.h b/src/lib/include/fwts_kernel.h
new file mode 100644
index 00000000..a89576ae
--- /dev/null
+++ b/src/lib/include/fwts_kernel.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2021 Canonical
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef __FWTS_KERNEL_H__
+#define __FWTS_KERNEL_H__
+
+bool fwts_kernel_config_set(const char *config);
+
+#endif
diff --git a/src/lib/src/Makefile.am b/src/lib/src/Makefile.am
index 55c52b41..0a39882a 100644
--- a/src/lib/src/Makefile.am
+++ b/src/lib/src/Makefile.am
@@ -83,6 +83,7 @@ libfwts_la_SOURCES =          \
        fwts_ioport.c           \
        fwts_ipmi.c             \
        fwts_json.c             \
+       fwts_kernel.c           \
        fwts_keymap.c           \
        fwts_klog.c             \
        fwts_olog.c             \
diff --git a/src/lib/src/fwts_kernel.c b/src/lib/src/fwts_kernel.c
new file mode 100644
index 00000000..10d11a99
--- /dev/null
+++ b/src/lib/src/fwts_kernel.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2021 Canonical
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include <sys/utsname.h>
+
+#include "fwts.h"
+#include "fwts_kernel.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <bsd/string.h>
+
+#define CONFIG_FILE_PREFIX     "/boot/config-"
+
+/*
+ *  fwts_kernel_config_set
+ *      check whether a kernel config is set, ex.
+ *      true if CONFIG_XYZ=y or CONFIG_XYZ=m
+ */
+bool fwts_kernel_config_set(const char *config)
+{
+       const size_t config_str_len = strlen(config) + 3;
+       char config_file[PATH_MAX];
+       char config_str[255];
+       size_t config_file_len;
+       fwts_list* config_list;
+       fwts_list_link *item;
+       struct utsname buf;
+
+       /* get path of config file, i.e. /boot/config-5.11.0-38-generic */
+       uname(&buf);
+       config_file_len = strlen(CONFIG_FILE_PREFIX) + strlen(buf.release) + 1;
+       (void)strlcpy(config_file, CONFIG_FILE_PREFIX, config_file_len);
+       (void)strlcat(config_file, buf.release, config_file_len);
+
+       config_list = fwts_file_open_and_read(config_file);
+       if (config_list == NULL)
+               return false;
+
+       fwts_list_foreach(item, config_list) {
+               /* check built-in, i.e. =y */
+               (void)strlcpy(config_str, config, config_str_len);
+               (void)strlcat(config_str, "=y", config_str_len);
+               if (!strncmp(fwts_text_list_text(item), config_str, strlen(config_str))) {
+                       fwts_list_free(config_list, free);
+                       return true;
+               }
+
+               /* check module, i.e. =m */
+               config_str[strlen(config_str) - 1] = 'm';
+               if (!strncmp(fwts_text_list_text(item), config_str, strlen(config_str))) {
+                       fwts_list_free(config_list, free);
+                       return true;
+               }
+       }
+
+       fwts_list_free(config_list, free);
+       return false;
+}
--
2.32.0

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On 11/11/21 4:25 AM, Alex Hung wrote:
> Buglink: https://bugs.launchpad.net/bugs/1947786
> 
> Signed-off-by: Alex Hung <alex.hung@canonical.com>
> ---
>  src/dmi/dmicheck/dmicheck.c   | 10 +++++
>  src/lib/include/fwts.h        |  1 +
>  src/lib/include/fwts_kernel.h | 25 ++++++++++++
>  src/lib/src/Makefile.am       |  1 +
>  src/lib/src/fwts_kernel.c     | 74 +++++++++++++++++++++++++++++++++++
>  5 files changed, 111 insertions(+)
>  create mode 100644 src/lib/include/fwts_kernel.h
>  create mode 100644 src/lib/src/fwts_kernel.c
> 
> diff --git a/src/dmi/dmicheck/dmicheck.c b/src/dmi/dmicheck/dmicheck.c
> index 7f6a90c4..67715687 100644
> --- a/src/dmi/dmicheck/dmicheck.c
> +++ b/src/dmi/dmicheck/dmicheck.c
> @@ -381,6 +381,11 @@ static void* dmi_table_smbios(fwts_framework *fw, fwts_smbios_entry *entry)
>  		free(table);
>  	}
>  
> +#ifdef FWTS_ARCH_AARCH64
> +	if (fwts_kernel_config_set("CONFIG_STRICT_DEVMEM"
Is it better to print out some information here?
> +		return NULL;
> +#endif
> +
>  	mem = fwts_mmap(addr, length);
>  	if (mem != FWTS_MAP_FAILED) {
>  		/* Can we safely copy the table? */
> @@ -429,6 +434,11 @@ static void* dmi_table_smbios30(fwts_framework *fw, fwts_smbios30_entry *entry)
>  		free(table);
>  	}
>  
> +#ifdef FWTS_ARCH_AARCH64
> +	if (fwts_kernel_config_set("CONFIG_STRICT_DEVMEM"))
same here.

Ivan
> +		return NULL;
> +#endif
> +
>  	mem = fwts_mmap(addr, length);
>  	if (mem != FWTS_MAP_FAILED) {
>  		/* Can we safely copy the table? */
> diff --git a/src/lib/include/fwts.h b/src/lib/include/fwts.h
> index 551a4e09..be754a99 100644
> --- a/src/lib/include/fwts.h
> +++ b/src/lib/include/fwts.h
> @@ -185,6 +185,7 @@
>  #include "fwts_iasl.h"
>  #include "fwts_ipmi.h"
>  #include "fwts_klog.h"
> +#include "fwts_kernel.h"
>  #include "fwts_olog.h"
>  #include "fwts_pipeio.h"
>  #include "fwts_stringextras.h"
> diff --git a/src/lib/include/fwts_kernel.h b/src/lib/include/fwts_kernel.h
> new file mode 100644
> index 00000000..a89576ae
> --- /dev/null
> +++ b/src/lib/include/fwts_kernel.h
> @@ -0,0 +1,25 @@
> +/*
> + * Copyright (C) 2021 Canonical
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version 2
> + * of the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
> + *
> + */
> +
> +#ifndef __FWTS_KERNEL_H__
> +#define __FWTS_KERNEL_H__
> +
> +bool fwts_kernel_config_set(const char *config);
> +
> +#endif
> diff --git a/src/lib/src/Makefile.am b/src/lib/src/Makefile.am
> index 55c52b41..0a39882a 100644
> --- a/src/lib/src/Makefile.am
> +++ b/src/lib/src/Makefile.am
> @@ -83,6 +83,7 @@ libfwts_la_SOURCES = 		\
>  	fwts_ioport.c		\
>  	fwts_ipmi.c		\
>  	fwts_json.c		\
> +	fwts_kernel.c 		\
>  	fwts_keymap.c 		\
>  	fwts_klog.c 		\
>  	fwts_olog.c		\
> diff --git a/src/lib/src/fwts_kernel.c b/src/lib/src/fwts_kernel.c
> new file mode 100644
> index 00000000..10d11a99
> --- /dev/null
> +++ b/src/lib/src/fwts_kernel.c
> @@ -0,0 +1,74 @@
> +/*
> + * Copyright (C) 2021 Canonical
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version 2
> + * of the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
> + *
> + */
> +
> +#include <sys/utsname.h>
> +
> +#include "fwts.h"
> +#include "fwts_kernel.h"
> +#include <stdlib.h>
> +#include <stdio.h>
> +#include <bsd/string.h>
> +
> +#define CONFIG_FILE_PREFIX	"/boot/config-"
> +
> +/*
> + *  fwts_kernel_config_set
> + *	 check whether a kernel config is set, ex.
> + *	 true if CONFIG_XYZ=y or CONFIG_XYZ=m
> + */
> +bool fwts_kernel_config_set(const char *config)
> +{
> +	const size_t config_str_len = strlen(config) + 3;
> +	char config_file[PATH_MAX];
> +	char config_str[255];
> +	size_t config_file_len;
> +	fwts_list* config_list;
> +	fwts_list_link *item;
> +	struct utsname buf;
> +
> +	/* get path of config file, i.e. /boot/config-5.11.0-38-generic */
> +	uname(&buf);
> +	config_file_len = strlen(CONFIG_FILE_PREFIX) + strlen(buf.release) + 1;
> +	(void)strlcpy(config_file, CONFIG_FILE_PREFIX, config_file_len);
> +	(void)strlcat(config_file, buf.release, config_file_len);
> +
> +	config_list = fwts_file_open_and_read(config_file);
> +	if (config_list == NULL)
> +		return false;
> +
> +	fwts_list_foreach(item, config_list) {
> +		/* check built-in, i.e. =y */
> +		(void)strlcpy(config_str, config, config_str_len);
> +		(void)strlcat(config_str, "=y", config_str_len);
> +		if (!strncmp(fwts_text_list_text(item), config_str, strlen(config_str))) {
> +			fwts_list_free(config_list, free);
> +			return true;
> +		}
> +
> +		/* check module, i.e. =m */
> +		config_str[strlen(config_str) - 1] = 'm';
> +		if (!strncmp(fwts_text_list_text(item), config_str, strlen(config_str))) {
> +			fwts_list_free(config_list, free);
> +			return true;
> +		}
> +	}
> +
> +	fwts_list_free(config_list, free);
> +	return false;
> +}
>