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util/nvmutil: be clearer about GbE file sizes

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the partsize variable is also misleading, because it
refers to the full half of a file, which might be
bigger than 4KB. this variable name is a hangover
from when nvmutil only supported 8KB files.

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-06 22:34:15 +00:00
parent e273391792
commit a7d7f68a5c
1 changed files with 7 additions and 5 deletions
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util/nvmutil/nvmutil.c
+7 -5
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@@ -121,14 +121,13 @@ static const char *rname = NULL;
static uint8_t buf[GBE_FILE_SIZE]; /* 8KB */
static uint16_t mac_buf[3];
static off_t partsize;
static off_t gbe_file_size;
static int gbe_flags;
#ifndef HAVE_ARC4RANDOM
static int rfd = -1;
#endif
static int gbe_fd = -1;
static struct stat gbe_st;
static size_t part;
static unsigned char invert;
static unsigned char part_modified[2];
@@ -342,13 +341,16 @@ open_dev_urandom(void)
static void
open_gbe_file(void)
{
static struct stat gbe_st;
xopen(&gbe_fd, fname, gbe_flags, &gbe_st);
switch(gbe_st.st_size) {
gbe_file_size = gbe_st.st_size;
switch (gbe_file_size) {
case SIZE_8KB:
case SIZE_16KB:
case SIZE_128KB:
partsize = gbe_st.st_size >> 1;
break;
default:
err(ECANCELED, "File size must be 8KB, 16KB or 128KB");
@@ -841,7 +843,7 @@ static off_t
gbe_file_offset(size_t p, const char *f_op)
{
return gbe_x_offset(p, f_op, "file",
partsize, gbe_st.st_size);
gbe_file_size >> 1, gbe_file_size);
}
/*