From 142fa60f61f93805471012f24e029af6d113c5cc Mon Sep 17 00:00:00 2001 From: André Almeida Date: Mon, 21 Oct 2024 13:37:20 -0300 Subject: unicode: Recreate utf8_parse_version() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit All filesystems that currently support UTF-8 casefold can fetch the UTF-8 version from the filesystem metadata stored on disk. They can get the data stored and directly match it to a integer, so they can skip the string parsing step, which motivated the removal of this function in the first place. However, for tmpfs, the only way to tell the kernel which UTF-8 version we are about to use is via mount options, using a string. Re-introduce utf8_parse_version() to be used by tmpfs. This version differs from the original by skipping the intermediate step of copying the version string to an auxiliary string before calling match_token(). This versions calls match_token() in the argument string. The paramenters are simpler now as well. utf8_parse_version() was created by 9d53690f0d4 ("unicode: implement higher level API for string handling") and later removed by 49bd03cc7e9 ("unicode: pass a UNICODE_AGE() tripple to utf8_load"). Signed-off-by: André Almeida Link: https://lore.kernel.org/r/20241021-tonyk-tmpfs-v8-4-f443d5814194@igalia.com Reviewed-by: Theodore Ts'o Reviewed-by: Gabriel Krisman Bertazi Signed-off-by: Christian Brauner --- include/linux/unicode.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/unicode.h b/include/linux/unicode.h index 0c0ab04e84ee..5e6b212a2aed 100644 --- a/include/linux/unicode.h +++ b/include/linux/unicode.h @@ -78,4 +78,6 @@ int utf8_casefold_hash(const struct unicode_map *um, const void *salt, struct unicode_map *utf8_load(unsigned int version); void utf8_unload(struct unicode_map *um); +int utf8_parse_version(char *version); + #endif /* _LINUX_UNICODE_H */ -- cgit v1.2.3