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-rw-r--r--fs/unicode/utf8-core.c128
1 files changed, 65 insertions, 63 deletions
diff --git a/fs/unicode/utf8-core.c b/fs/unicode/utf8-core.c
index 2a878b739115..67aaadc3ab07 100644
--- a/fs/unicode/utf8-core.c
+++ b/fs/unicode/utf8-core.c
@@ -5,15 +5,13 @@
#include <linux/slab.h>
#include <linux/parser.h>
#include <linux/errno.h>
-#include <linux/unicode.h>
+#include <linux/stringhash.h>
#include "utf8n.h"
int utf8_validate(const struct unicode_map *um, const struct qstr *str)
{
- const struct utf8data *data = utf8nfdi(um->version);
-
- if (utf8nlen(data, str->name, str->len) < 0)
+ if (utf8nlen(um, UTF8_NFDI, str->name, str->len) < 0)
return -1;
return 0;
}
@@ -22,14 +20,13 @@ EXPORT_SYMBOL(utf8_validate);
int utf8_strncmp(const struct unicode_map *um,
const struct qstr *s1, const struct qstr *s2)
{
- const struct utf8data *data = utf8nfdi(um->version);
struct utf8cursor cur1, cur2;
int c1, c2;
- if (utf8ncursor(&cur1, data, s1->name, s1->len) < 0)
+ if (utf8ncursor(&cur1, um, UTF8_NFDI, s1->name, s1->len) < 0)
return -EINVAL;
- if (utf8ncursor(&cur2, data, s2->name, s2->len) < 0)
+ if (utf8ncursor(&cur2, um, UTF8_NFDI, s2->name, s2->len) < 0)
return -EINVAL;
do {
@@ -49,14 +46,13 @@ EXPORT_SYMBOL(utf8_strncmp);
int utf8_strncasecmp(const struct unicode_map *um,
const struct qstr *s1, const struct qstr *s2)
{
- const struct utf8data *data = utf8nfdicf(um->version);
struct utf8cursor cur1, cur2;
int c1, c2;
- if (utf8ncursor(&cur1, data, s1->name, s1->len) < 0)
+ if (utf8ncursor(&cur1, um, UTF8_NFDICF, s1->name, s1->len) < 0)
return -EINVAL;
- if (utf8ncursor(&cur2, data, s2->name, s2->len) < 0)
+ if (utf8ncursor(&cur2, um, UTF8_NFDICF, s2->name, s2->len) < 0)
return -EINVAL;
do {
@@ -80,12 +76,11 @@ int utf8_strncasecmp_folded(const struct unicode_map *um,
const struct qstr *cf,
const struct qstr *s1)
{
- const struct utf8data *data = utf8nfdicf(um->version);
struct utf8cursor cur1;
int c1, c2;
int i = 0;
- if (utf8ncursor(&cur1, data, s1->name, s1->len) < 0)
+ if (utf8ncursor(&cur1, um, UTF8_NFDICF, s1->name, s1->len) < 0)
return -EINVAL;
do {
@@ -104,11 +99,10 @@ EXPORT_SYMBOL(utf8_strncasecmp_folded);
int utf8_casefold(const struct unicode_map *um, const struct qstr *str,
unsigned char *dest, size_t dlen)
{
- const struct utf8data *data = utf8nfdicf(um->version);
struct utf8cursor cur;
size_t nlen = 0;
- if (utf8ncursor(&cur, data, str->name, str->len) < 0)
+ if (utf8ncursor(&cur, um, UTF8_NFDICF, str->name, str->len) < 0)
return -EINVAL;
for (nlen = 0; nlen < dlen; nlen++) {
@@ -122,17 +116,35 @@ int utf8_casefold(const struct unicode_map *um, const struct qstr *str,
}
return -EINVAL;
}
-
EXPORT_SYMBOL(utf8_casefold);
+int utf8_casefold_hash(const struct unicode_map *um, const void *salt,
+ struct qstr *str)
+{
+ struct utf8cursor cur;
+ int c;
+ unsigned long hash = init_name_hash(salt);
+
+ if (utf8ncursor(&cur, um, UTF8_NFDICF, str->name, str->len) < 0)
+ return -EINVAL;
+
+ while ((c = utf8byte(&cur))) {
+ if (c < 0)
+ return -EINVAL;
+ hash = partial_name_hash((unsigned char)c, hash);
+ }
+ str->hash = end_name_hash(hash);
+ return 0;
+}
+EXPORT_SYMBOL(utf8_casefold_hash);
+
int utf8_normalize(const struct unicode_map *um, const struct qstr *str,
unsigned char *dest, size_t dlen)
{
- const struct utf8data *data = utf8nfdi(um->version);
struct utf8cursor cur;
ssize_t nlen = 0;
- if (utf8ncursor(&cur, data, str->name, str->len) < 0)
+ if (utf8ncursor(&cur, um, UTF8_NFDI, str->name, str->len) < 0)
return -EINVAL;
for (nlen = 0; nlen < dlen; nlen++) {
@@ -146,69 +158,59 @@ int utf8_normalize(const struct unicode_map *um, const struct qstr *str,
}
return -EINVAL;
}
-
EXPORT_SYMBOL(utf8_normalize);
-static int utf8_parse_version(const char *version, unsigned int *maj,
- unsigned int *min, unsigned int *rev)
+static const struct utf8data *find_table_version(const struct utf8data *table,
+ size_t nr_entries, unsigned int version)
{
- substring_t args[3];
- char version_string[12];
- static const struct match_token token[] = {
- {1, "%d.%d.%d"},
- {0, NULL}
- };
+ size_t i = nr_entries - 1;
- strncpy(version_string, version, sizeof(version_string));
-
- if (match_token(version_string, token, args) != 1)
- return -EINVAL;
-
- if (match_int(&args[0], maj) || match_int(&args[1], min) ||
- match_int(&args[2], rev))
- return -EINVAL;
-
- return 0;
+ while (version < table[i].maxage)
+ i--;
+ if (version > table[i].maxage)
+ return NULL;
+ return &table[i];
}
-struct unicode_map *utf8_load(const char *version)
+struct unicode_map *utf8_load(unsigned int version)
{
- struct unicode_map *um = NULL;
- int unicode_version;
-
- if (version) {
- unsigned int maj, min, rev;
-
- if (utf8_parse_version(version, &maj, &min, &rev) < 0)
- return ERR_PTR(-EINVAL);
-
- if (!utf8version_is_supported(maj, min, rev))
- return ERR_PTR(-EINVAL);
-
- unicode_version = UNICODE_AGE(maj, min, rev);
- } else {
- unicode_version = utf8version_latest();
- printk(KERN_WARNING"UTF-8 version not specified. "
- "Assuming latest supported version (%d.%d.%d).",
- (unicode_version >> 16) & 0xff,
- (unicode_version >> 8) & 0xff,
- (unicode_version & 0xff));
- }
+ struct unicode_map *um;
um = kzalloc(sizeof(struct unicode_map), GFP_KERNEL);
if (!um)
return ERR_PTR(-ENOMEM);
-
- um->charset = "UTF-8";
- um->version = unicode_version;
-
+ um->version = version;
+
+ um->tables = symbol_request(utf8_data_table);
+ if (!um->tables)
+ goto out_free_um;
+
+ if (!utf8version_is_supported(um, version))
+ goto out_symbol_put;
+ um->ntab[UTF8_NFDI] = find_table_version(um->tables->utf8nfdidata,
+ um->tables->utf8nfdidata_size, um->version);
+ if (!um->ntab[UTF8_NFDI])
+ goto out_symbol_put;
+ um->ntab[UTF8_NFDICF] = find_table_version(um->tables->utf8nfdicfdata,
+ um->tables->utf8nfdicfdata_size, um->version);
+ if (!um->ntab[UTF8_NFDICF])
+ goto out_symbol_put;
return um;
+
+out_symbol_put:
+ symbol_put(um->tables);
+out_free_um:
+ kfree(um);
+ return ERR_PTR(-EINVAL);
}
EXPORT_SYMBOL(utf8_load);
void utf8_unload(struct unicode_map *um)
{
- kfree(um);
+ if (um) {
+ symbol_put(utf8_data_table);
+ kfree(um);
+ }
}
EXPORT_SYMBOL(utf8_unload);
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