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authorMasami Hiramatsu <mhiramat@kernel.org>2021-09-16 09:23:20 +0300
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2021-10-11 03:43:42 +0300
commitbdac5c2b243f68ec15f8203c3348ae79fee8e8d8 (patch)
treea48e16528af72efc5e487565cde23a1de5a9a38b /lib/bootconfig.c
parent6644c654ea70e0d8b8d5111e1272f8f29df00f21 (diff)
downloadlinux-bdac5c2b243f68ec15f8203c3348ae79fee8e8d8.tar.xz
bootconfig: Allocate xbc_data inside xbc_init()
Allocate 'xbc_data' in the xbc_init() so that it does not need to care about the ownership of the copied data. Link: https://lkml.kernel.org/r/163177339986.682366.898762699429769117.stgit@devnote2 Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'lib/bootconfig.c')
-rw-r--r--lib/bootconfig.c33
1 files changed, 21 insertions, 12 deletions
diff --git a/lib/bootconfig.c b/lib/bootconfig.c
index 5ae248b29373..66b02fddfea8 100644
--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -789,6 +789,7 @@ static int __init xbc_verify_tree(void)
*/
void __init xbc_destroy_all(void)
{
+ memblock_free_ptr(xbc_data, xbc_data_size);
xbc_data = NULL;
xbc_data_size = 0;
xbc_node_num = 0;
@@ -799,19 +800,20 @@ void __init xbc_destroy_all(void)
/**
* xbc_init() - Parse given XBC file and build XBC internal tree
- * @buf: boot config text
+ * @data: The boot config text original data
+ * @size: The size of @data
* @emsg: A pointer of const char * to store the error message
* @epos: A pointer of int to store the error position
*
- * This parses the boot config text in @buf. @buf must be a
- * null terminated string and smaller than XBC_DATA_MAX.
+ * This parses the boot config text in @data. @size must be smaller
+ * than XBC_DATA_MAX.
* Return the number of stored nodes (>0) if succeeded, or -errno
* if there is any error.
* In error cases, @emsg will be updated with an error message and
* @epos will be updated with the error position which is the byte offset
* of @buf. If the error is not a parser error, @epos will be -1.
*/
-int __init xbc_init(char *buf, const char **emsg, int *epos)
+int __init xbc_init(const char *data, size_t size, const char **emsg, int *epos)
{
char *p, *q;
int ret, c;
@@ -824,28 +826,35 @@ int __init xbc_init(char *buf, const char **emsg, int *epos)
*emsg = "Bootconfig is already initialized";
return -EBUSY;
}
-
- ret = strlen(buf);
- if (ret > XBC_DATA_MAX - 1 || ret == 0) {
+ if (size > XBC_DATA_MAX || size == 0) {
if (emsg)
- *emsg = ret ? "Config data is too big" :
+ *emsg = size ? "Config data is too big" :
"Config data is empty";
return -ERANGE;
}
+ xbc_data = memblock_alloc(size + 1, SMP_CACHE_BYTES);
+ if (!xbc_data) {
+ if (emsg)
+ *emsg = "Failed to allocate bootconfig data";
+ return -ENOMEM;
+ }
+ memcpy(xbc_data, data, size);
+ xbc_data[size] = '\0';
+ xbc_data_size = size + 1;
+
xbc_nodes = memblock_alloc(sizeof(struct xbc_node) * XBC_NODE_MAX,
SMP_CACHE_BYTES);
if (!xbc_nodes) {
if (emsg)
*emsg = "Failed to allocate bootconfig nodes";
+ xbc_destroy_all();
return -ENOMEM;
}
memset(xbc_nodes, 0, sizeof(struct xbc_node) * XBC_NODE_MAX);
- xbc_data = buf;
- xbc_data_size = ret + 1;
- last_parent = NULL;
- p = buf;
+ last_parent = NULL;
+ p = xbc_data;
do {
q = strpbrk(p, "{}=+;:\n#");
if (!q) {