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fw_cfg: add "modify" functions for all types 

This allows to alter the contents of an already added item.

Signed-off-by: Sergio Lopez <slp@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
master
Sergio Lopez 2019-09-24 11:38:18 +02:00 committed by Paolo Bonzini
parent 703a548aa9
commit e5f6aa319f
2 changed files with 71 additions and 0 deletions
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29
hw/nvram/fw_cfg.c
View File

@ -690,6 +690,15 @@ void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value)
fw_cfg_add_bytes(s, key, g_memdup(value, sz), sz);
}
void fw_cfg_modify_string(FWCfgState *s, uint16_t key, const char *value)
{
size_t sz = strlen(value) + 1;
char *old;
old = fw_cfg_modify_bytes_read(s, key, g_memdup(value, sz), sz);
g_free(old);
}
void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
{
uint16_t *copy;
@ -720,6 +729,16 @@ void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
fw_cfg_add_bytes(s, key, copy, sizeof(value));
}
void fw_cfg_modify_i32(FWCfgState *s, uint16_t key, uint32_t value)
{
uint32_t *copy, *old;
copy = g_malloc(sizeof(value));
*copy = cpu_to_le32(value);
old = fw_cfg_modify_bytes_read(s, key, copy, sizeof(value));
g_free(old);
}
void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
{
uint64_t *copy;
@ -730,6 +749,16 @@ void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
fw_cfg_add_bytes(s, key, copy, sizeof(value));
}
void fw_cfg_modify_i64(FWCfgState *s, uint16_t key, uint64_t value)
{
uint64_t *copy, *old;
copy = g_malloc(sizeof(value));
*copy = cpu_to_le64(value);
old = fw_cfg_modify_bytes_read(s, key, copy, sizeof(value));
g_free(old);
}
void fw_cfg_set_order_override(FWCfgState *s, int order)
{
assert(s->fw_cfg_order_override == 0);

42
include/hw/nvram/fw_cfg.h
View File

@ -98,6 +98,20 @@ void fw_cfg_add_bytes(FWCfgState *s, uint16_t key, void *data, size_t len);
*/
void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value);
/**
* fw_cfg_modify_string:
* @s: fw_cfg device being modified
* @key: selector key value for new fw_cfg item
* @value: NUL-terminated ascii string
*
* Replace the fw_cfg item available by selecting the given key. The new
* data will consist of a dynamically allocated copy of the provided string,
* including its NUL terminator. The data being replaced, assumed to have
* been dynamically allocated during an earlier call to either
* fw_cfg_add_string() or fw_cfg_modify_string(), is freed before returning.
*/
void fw_cfg_modify_string(FWCfgState *s, uint16_t key, const char *value);
/**
* fw_cfg_add_i16:
* @s: fw_cfg device being modified
@ -136,6 +150,20 @@ void fw_cfg_modify_i16(FWCfgState *s, uint16_t key, uint16_t value);
*/
void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value);
/**
* fw_cfg_modify_i32:
* @s: fw_cfg device being modified
* @key: selector key value for new fw_cfg item
* @value: 32-bit integer
*
* Replace the fw_cfg item available by selecting the given key. The new
* data will consist of a dynamically allocated copy of the given 32-bit
* value, converted to little-endian representation. The data being replaced,
* assumed to have been dynamically allocated during an earlier call to
* either fw_cfg_add_i32() or fw_cfg_modify_i32(), is freed before returning.
*/
void fw_cfg_modify_i32(FWCfgState *s, uint16_t key, uint32_t value);
/**
* fw_cfg_add_i64:
* @s: fw_cfg device being modified
@ -148,6 +176,20 @@ void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value);
*/
void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value);
/**
* fw_cfg_modify_i64:
* @s: fw_cfg device being modified
* @key: selector key value for new fw_cfg item
* @value: 64-bit integer
*
* Replace the fw_cfg item available by selecting the given key. The new
* data will consist of a dynamically allocated copy of the given 64-bit
* value, converted to little-endian representation. The data being replaced,
* assumed to have been dynamically allocated during an earlier call to
* either fw_cfg_add_i64() or fw_cfg_modify_i64(), is freed before returning.
*/
void fw_cfg_modify_i64(FWCfgState *s, uint16_t key, uint64_t value);
/**
* fw_cfg_add_file:
* @s: fw_cfg device being modified