[PATCH v4 04/23] nls: Split default charset from NLS core

Gabriel Krisman Bertazi
2018-12-06T23:09:24Z

fs/nls/Makefile | 1 +
fs/nls/nls_core.c | 94 ++++++++++++++++++++++++++++
fs/nls/{nls_base.c => nls_default.c} | 93 +++------------------------
3 files changed, 102 insertions(+), 86 deletions(-)
create mode 100644 fs/nls/nls_core.c
rename fs/nls/{nls_base.c => nls_default.c} (90%)

diff --git a/fs/nls/Makefile b/fs/nls/Makefile
index ac54db297128..5f42ceff9d15 100644
--- a/fs/nls/Makefile
+++ b/fs/nls/Makefile
@@ -3,6 +3,7 @@
# Makefile for native language support
#

+nls_base-y := nls_core.o nls_default.o
obj-$(CONFIG_NLS) += nls_base.o

obj-$(CONFIG_NLS_CODEPAGE_437) += nls_cp437.o
diff --git a/fs/nls/nls_core.c b/fs/nls/nls_core.c
new file mode 100644
index 000000000000..3f7de8f4c5b2
--- /dev/null
+++ b/fs/nls/nls_core.c
@@ -0,0 +1,94 @@
+/*
+ * linux/fs/nls/nls_core.c
+ *
+ * Native language support--charsets and unicode translations.
+ * By Gordon Chaffee 1996, 1997
+ *
+ * Unicode based case conversion 1999 by Wolfram Pienkoss
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/nls.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/kmod.h>
+#include <linux/spinlock.h>
+
+static struct nls_table default_table;
+static struct nls_table *tables = &default_table;
+static DEFINE_SPINLOCK(nls_lock);
+
+int __register_nls(struct nls_table *nls, struct module *owner)
+{
+ struct nls_table ** tmp = &tables;
+
+ if (nls->next)
+ return -EBUSY;
+
+ nls->owner = owner;
+ spin_lock(&nls_lock);
+ while (*tmp) {
+ if (nls == *tmp) {
+ spin_unlock(&nls_lock);
+ return -EBUSY;
+ }
+ tmp = &(*tmp)->next;
+ }
+ nls->next = tables;
+ tables = nls;
+ spin_unlock(&nls_lock);
+ return 0;
+}
+EXPORT_SYMBOL(__register_nls);
+
+int unregister_nls(struct nls_table * nls)
+{
+ struct nls_table ** tmp = &tables;
+
+ spin_lock(&nls_lock);
+ while (*tmp) {
+ if (nls == *tmp) {
+ *tmp = nls->next;
+ spin_unlock(&nls_lock);
+ return 0;
+ }
+ tmp = &(*tmp)->next;
+ }
+ spin_unlock(&nls_lock);
+ return -EINVAL;
+}
+
+static struct nls_table *find_nls(char *charset)
+{
+ struct nls_table *nls;
+ spin_lock(&nls_lock);
+ for (nls = tables; nls; nls = nls->next) {
+ if (!strcmp(nls_charset_name(nls), charset))
+ break;
+ if (nls->alias && !strcmp(nls->alias, charset))
+ break;
+ }
+ if (nls && !try_module_get(nls->owner))
+ nls = NULL;
+ spin_unlock(&nls_lock);
+ return nls;
+}
+
+struct nls_table *load_nls(char *charset)
+{
+ return try_then_request_module(find_nls(charset), "nls_%s", charset);
+}
+
+void unload_nls(struct nls_table *nls)
+{
+ if (nls)
+ module_put(nls->owner);
+}
+
+EXPORT_SYMBOL(unregister_nls);
+EXPORT_SYMBOL(unload_nls);
+EXPORT_SYMBOL(load_nls);
+
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/fs/nls/nls_base.c b/fs/nls/nls_default.c
similarity index 90%
rename from fs/nls/nls_base.c
rename to fs/nls/nls_default.c
index 0bb0acf6893f..c5d7e8391b22 100644
--- a/fs/nls/nls_base.c
+++ b/fs/nls/nls_default.c
@@ -1,5 +1,5 @@
/*
- * linux/fs/nls/nls_base.c
+ * linux/fs/nls/nls_default.c
*
* Native language support--charsets and unicode translations.
* By Gordon Chaffee 1996, 1997
@@ -8,23 +8,17 @@
*
*/

+/*
+ * Sample implementation from Unicode home page.
+ * http://www.stonehand.com/unicode/standard/fss-utf.html
+ */
+
#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/nls.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/kmod.h>
-#include <linux/spinlock.h>
#include <asm/byteorder.h>
+#include <linux/nls.h>

static struct nls_table default_table;
-static struct nls_table *tables = &default_table;
-static DEFINE_SPINLOCK(nls_lock);

-/*
- * Sample implementation from Unicode home page.
- * http://www.stonehand.com/unicode/standard/fss-utf.html
- */
struct utf8_table {
int cmask;
int cval;
@@ -232,73 +226,6 @@ int utf16s_to_utf8s(const wchar_t *pwcs, int inlen, enum utf16_endian endian,
}
EXPORT_SYMBOL(utf16s_to_utf8s);

-int __register_nls(struct nls_table *nls, struct module *owner)
-{
- struct nls_table ** tmp = &tables;
-
- if (nls->next)
- return -EBUSY;
-
- nls->owner = owner;
- spin_lock(&nls_lock);
- while (*tmp) {
- if (nls == *tmp) {
- spin_unlock(&nls_lock);
- return -EBUSY;
- }
- tmp = &(*tmp)->next;
- }
- nls->next = tables;
- tables = nls;
- spin_unlock(&nls_lock);
- return 0;
-}
-EXPORT_SYMBOL(__register_nls);
-
-int unregister_nls(struct nls_table * nls)
-{
- struct nls_table ** tmp = &tables;
-
- spin_lock(&nls_lock);
- while (*tmp) {
- if (nls == *tmp) {
- *tmp = nls->next;
- spin_unlock(&nls_lock);
- return 0;
- }
- tmp = &(*tmp)->next;
- }
- spin_unlock(&nls_lock);
- return -EINVAL;
-}
-
-static struct nls_table *find_nls(char *charset)
-{
- struct nls_table *nls;
- spin_lock(&nls_lock);
- for (nls = tables; nls; nls = nls->next) {
- if (!strcmp(nls_charset_name(nls), charset))
- break;
- if (nls->alias && !strcmp(nls->alias, charset))
- break;
- }
- if (nls && !try_module_get(nls->owner))
- nls = NULL;
- spin_unlock(&nls_lock);
- return nls;
-}
-
-struct nls_table *load_nls(char *charset)
-{
- return try_then_request_module(find_nls(charset), "nls_%s", charset);
-}
-
-void unload_nls(struct nls_table *nls)
-{
- if (nls)
- module_put(nls->owner);
-}
-
static const wchar_t charset2uni[256] = {
/* 0x00*/
0x0000, 0x0001, 0x0002, 0x0003,
@@ -543,10 +470,4 @@ struct nls_table *load_nls_default(void)
else
return &default_table;
}
-
-EXPORT_SYMBOL(unregister_nls);
-EXPORT_SYMBOL(unload_nls);
-EXPORT_SYMBOL(load_nls);
EXPORT_SYMBOL(load_nls_default);
-
-MODULE_LICENSE("Dual BSD/GPL");
--
2.20.0.rc2