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bootconfig: Share the checksum function with tools

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Move the checksum calculation function into the header for sharing it
with tools/bootconfig.

Link: https://lkml.kernel.org/r/162262197470.264090.16325743685807878807.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu
2021-06-02 17:19:34 +09:00
committed by Steven Rostedt (VMware)
parent 0ff2bb7d42
commit 99f4f5d623
3 changed files with 23 additions and 24 deletions
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15
tools/bootconfig/main.c
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@@ -126,17 +126,6 @@ static void xbc_show_list(void)
}
}
/* Simple real checksum */
static int checksum(unsigned char *buf, int len)
{
int i, sum = 0;
for (i = 0; i < len; i++)
sum += buf[i];
return sum;
}
#define PAGE_SIZE 4096
static int load_xbc_fd(int fd, char **buf, int size)
@@ -232,7 +221,7 @@ static int load_xbc_from_initrd(int fd, char **buf)
return ret;
/* Wrong Checksum */
rcsum = checksum((unsigned char *)*buf, size);
rcsum = xbc_calc_checksum(*buf, size);
if (csum != rcsum) {
pr_err("checksum error: %d != %d\n", csum, rcsum);
return -EINVAL;
@@ -381,7 +370,7 @@ static int apply_xbc(const char *path, const char *xbc_path)
return ret;
}
size = strlen(buf) + 1;
csum = checksum((unsigned char *)buf, size);
csum = xbc_calc_checksum(buf, size);
/* Backup the bootconfig data */
data = calloc(size + BOOTCONFIG_ALIGN +