%s/curve/carve/
On 12/8/22 05:40, Masahisa Kojima wrote:
To retrieve the EFI variable name by efi_get_next_variable_name_int(),
the sequence of alloc -> efi_get_next_variable_name_int ->
realloc -> efi_get_next_variable_name_int is required.
In current code, this sequence repeatedly appears in
the several functions. It should be curved out a common function.
This commit also fixes the missing free() of var_name16
in eficonfig_delete_invalid_boot_option().
Signed-off-by: Masahisa Kojima <[email protected]>
---
cmd/eficonfig.c | 62 +++++++++----------------------------
include/efi_loader.h | 2 ++
lib/efi_loader/efi_helper.c | 34 ++++++++++++++++++++
3 files changed, 51 insertions(+), 47 deletions(-)
diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c
index 394ae67cce..cd7a51cc7e 100644
--- a/cmd/eficonfig.c
+++ b/cmd/eficonfig.c
@@ -1683,7 +1683,7 @@ static efi_status_t
eficonfig_show_boot_selection(unsigned int *selected)
u32 i;
u16 *bootorder;
efi_status_t ret;
- u16 *var_name16 = NULL, *p;
+ u16 *var_name16 = NULL;
efi_uintn_t num, size, buf_size;
buf_size = 0;
see below
struct efimenu *efi_menu;
struct list_head *pos, *n;
@@ -1718,24 +1718,12 @@ static efi_status_t
eficonfig_show_boot_selection(unsigned int *selected)
int index;
efi_guid_t guid;
- size = buf_size;
- ret = efi_get_next_variable_name_int(&size, var_name16, &guid);
+ ret = efi_get_variable_name(&buf_size, &var_name16, &guid);
if (ret == EFI_NOT_FOUND)
break;
- if (ret == EFI_BUFFER_TOO_SMALL) {
- buf_size = size;
- p = realloc(var_name16, buf_size);
- if (!p) {
- free(var_name16);
- return EFI_OUT_OF_RESOURCES;
- }
- var_name16 = p;
- ret = efi_get_next_variable_name_int(&size, var_name16,
&guid);
- }
- if (ret != EFI_SUCCESS) {
- free(var_name16);
- return ret;
- }
+ if (ret != EFI_SUCCESS)
+ goto out;
+
if (efi_varname_is_load_option(var_name16, &index)) {
/* If the index is included in the BootOrder, skip it */
if (search_bootorder(bootorder, num, index, NULL))
@@ -2026,7 +2014,7 @@ static efi_status_t
eficonfig_create_change_boot_order_entry(struct efimenu *efi
u32 i;
char *title;
efi_status_t ret;
- u16 *var_name16 = NULL, *p;
+ u16 *var_name16 = NULL;
efi_uintn_t size, buf_size;
/* list the load option in the order of BootOrder variable */
@@ -2054,19 +2042,9 @@ static efi_status_t
eficonfig_create_change_boot_order_entry(struct efimenu *efi
break;
size = buf_size;
- ret = efi_get_next_variable_name_int(&size, var_name16, &guid);
+ ret = efi_get_variable_name(&buf_size, &var_name16, &guid);
if (ret == EFI_NOT_FOUND)
break;
- if (ret == EFI_BUFFER_TOO_SMALL) {
- buf_size = size;
- p = realloc(var_name16, buf_size);
- if (!p) {
- ret = EFI_OUT_OF_RESOURCES;
- goto out;
- }
- var_name16 = p;
- ret = efi_get_next_variable_name_int(&size, var_name16,
&guid);
- }
if (ret != EFI_SUCCESS)
goto out;
@@ -2336,10 +2314,10 @@ efi_status_t
eficonfig_delete_invalid_boot_option(struct eficonfig_media_boot_op
efi_uintn_t size;
void *load_option;
struct efi_load_option lo;
- u16 *var_name16 = NULL, *p;
+ u16 *var_name16 = NULL;
u16 varname[] = u"Boot####";
efi_status_t ret = EFI_SUCCESS;
- efi_uintn_t varname_size, buf_size;
+ efi_uintn_t buf_size;
buf_size = 128;
var_name16 = malloc(buf_size);
Why allocate anything here? We already have a realloc() in
efi_get_variable_name() which will do the job. Just start with
var_name16 = NULL, buf_size = 0.
@@ -2352,24 +2330,12 @@ efi_status_t
eficonfig_delete_invalid_boot_option(struct eficonfig_media_boot_op
efi_guid_t guid;
efi_uintn_t tmp;
- varname_size = buf_size;
- ret = efi_get_next_variable_name_int(&varname_size, var_name16,
&guid);
+ ret = efi_get_variable_name(&buf_size, &var_name16, &guid);
if (ret == EFI_NOT_FOUND)
break;
- if (ret == EFI_BUFFER_TOO_SMALL) {
- buf_size = varname_size;
- p = realloc(var_name16, buf_size);
- if (!p) {
- free(var_name16);
- return EFI_OUT_OF_RESOURCES;
- }
- var_name16 = p;
- ret = efi_get_next_variable_name_int(&varname_size,
var_name16, &guid);
- }
- if (ret != EFI_SUCCESS) {
- free(var_name16);
- return ret;
- }
+ if (ret != EFI_SUCCESS)
+ goto out;
+
if (!efi_varname_is_load_option(var_name16, &index))
continue;
@@ -2407,6 +2373,8 @@ next:
}
out:
+ free(var_name16);
+
return ret;
}
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 0899e293e5..f80a16108a 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -708,6 +708,8 @@ int algo_to_len(const char *algo);
int efi_link_dev(efi_handle_t handle, struct udevice *dev);
int efi_unlink_dev(efi_handle_t handle);
bool efi_varname_is_load_option(u16 *var_name16, int *index);
+efi_status_t efi_get_variable_name(efi_uintn_t *size, u16 **buf,
+ efi_guid_t *guid);
/**
* efi_size_in_pages() - convert size in bytes to size in pages
diff --git a/lib/efi_loader/efi_helper.c b/lib/efi_loader/efi_helper.c
index 788cb9faec..ca9854ec79 100644
--- a/lib/efi_loader/efi_helper.c
+++ b/lib/efi_loader/efi_helper.c
@@ -223,3 +223,37 @@ bool efi_varname_is_load_option(u16 *var_name16, int
*index)
return false;
}
+
+/**
+ * efi_get_variable_name_() - get variable name
+ *
+ * This function is a wrapper of efi_get_next_variable_name_int().
+ * If efi_get_next_variable_name_int() returns EFI_BUFFER_TOO_SMALL,
+ * @size and @buf are updated by new buffer size and realloced buffer.
+ *
+ * @size: pointer to the buffer size
+ * @buf: pointer to the buffer
+ * @guid: pointer to the guid
+ * Return: status code
+ */
+efi_status_t efi_get_variable_name(efi_uintn_t *size, u16 **buf, efi_guid_t
*guid)
We should have next in the function name, e.g. "efi_next_variable_name".
+{
+ u16 *p;
+ efi_status_t ret;
+ efi_uintn_t buf_size = *size;
+
+ ret = efi_get_next_variable_name_int(&buf_size, *buf, guid);
+ if (ret == EFI_NOT_FOUND)
+ return ret;
+ if (ret == EFI_BUFFER_TOO_SMALL) {
+ p = realloc(*buf, buf_size);
+ if (!p)
*buf should be freed here and set to NULL.
Best regards
Heinrich
+ return EFI_OUT_OF_RESOURCES;
+
+ *buf = p;
+ *size = buf_size;
+ ret = efi_get_next_variable_name_int(&buf_size, *buf, guid);
+ }
+
+ return ret;
+}
