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util/nvmutil: generalise skip-read on copy/brick

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Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-08 17:20:36 +00:00
parent dd320601c2
commit 624ecc4ce1
1 changed files with 24 additions and 9 deletions
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33
util/nvmutil/nvmutil.c
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@@ -201,6 +201,11 @@ enum {
SET_MOD_BOTH /* set both parts modified */
};
enum {
ARG_NOPART,
ARG_PART
};
struct commands {
size_t chk; /* use by in later check on run_cmd,
against cmd index, to verify correct enum order */
@@ -210,6 +215,7 @@ struct commands {
uint8_t invert;
uint8_t set_modified; /* both, one part, both or neither */
/* affected by invert */
uint8_t arg_part; /* 0: no part given. 1: part given */
};
/*
@@ -217,30 +223,37 @@ struct commands {
*/
static const struct commands command[] = {
{ CMD_DUMP, "dump", cmd_dump, ARGC_3, NO_INVERT,
SET_MOD_OFF },
SET_MOD_OFF, ARG_NOPART },
{ CMD_SETMAC, "setmac", cmd_setmac, ARGC_3, NO_INVERT,
SET_MOD_OFF },
SET_MOD_OFF, ARG_NOPART },
/*
* Invert read and set both parts modified.
* No actual copying in memory is performed.
*/
{ CMD_SWAP, "swap", cmd_swap, ARGC_3, PART_INVERT,
SET_MOD_BOTH },
SET_MOD_BOTH, ARG_NOPART },
/*
* Invert read and set the copied part modified.
* No actual copying in memory is performed.
* arg_part set: we only need to read the specified part.
*/
{ CMD_COPY, "copy", cmd_copy, ARGC_4, PART_INVERT,
SET_MOD_N },
SET_MOD_N, ARG_PART },
/*
* arg_part set: we need only read the specified part.
*/
{ CMD_BRICK, "brick", cmd_brick, ARGC_4, NO_INVERT,
SET_MOD_OFF },
SET_MOD_OFF, ARG_PART },
/*
* arg_part set: we need only read the specified part.
*/
{ CMD_SETCHECKSUM, "setchecksum", cmd_setchecksum,
ARGC_4, NO_INVERT, SET_MOD_OFF },
ARGC_4, NO_INVERT, SET_MOD_OFF, ARG_PART },
};
#define MAX_CMD_LEN 50
@@ -401,6 +414,7 @@ sanitize_command_index(size_t c)
if (command[c].invert > 1)
err(ECANCELED, "cmd index %zu: invert above 1", c);
mod_type = command[c].set_modified;
switch (mod_type) {
case SET_MOD_0:
@@ -413,6 +427,9 @@ sanitize_command_index(size_t c)
err(EINVAL, "Unsupported set_mod type: %u",
mod_type);
}
if (command[c].arg_part > 1)
err(ECANCELED, "cmd index %zu: arg_part above 1", c);
}
static void
@@ -615,9 +632,7 @@ read_gbe_file(void)
*
* We can skip reading the other part, thus:
*/
if (cmd_index == CMD_COPY ||
cmd_index == CMD_BRICK ||
cmd_index == CMD_SETCHECKSUM)
if (command[cmd_index].arg_part)
do_read[part ^ 1] = 0;
for (p = 0; p < 2; p++) {