On Wed, May 18, 2022 at 09:40:41PM -0400, Gabriel Krisman Bertazi wrote:
> Now that ci_match is part of libfs, make f2fs reuse it instead of having
> a different implementation.
>
> Signed-off-by: Gabriel Krisman Bertazi <kris...@collabora.com>
>
> ---
> Changes since v3:
> - Drop cast (eric)
> - fix unused variable iff !CONFIG_UNICODE (lkp)
> ---
> fs/f2fs/dir.c | 58 ++++-----------------------------------------------
> 1 file changed, 4 insertions(+), 54 deletions(-)
>
> diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
> index 167a04074a2e..4e4b2b190188 100644
> --- a/fs/f2fs/dir.c
> +++ b/fs/f2fs/dir.c
> @@ -217,58 +217,6 @@ static struct f2fs_dir_entry *find_in_block(struct inode
> *dir,
> return f2fs_find_target_dentry(&d, fname, max_slots);
> }
>
> -#if IS_ENABLED(CONFIG_UNICODE)
> -/*
> - * Test whether a case-insensitive directory entry matches the filename
> - * being searched for.
> - *
> - * Returns 1 for a match, 0 for no match, and -errno on an error.
> - */
> -static int f2fs_match_ci_name(const struct inode *dir, const struct qstr
> *name,
> - const u8 *de_name, u32 de_name_len)
> -{
> - const struct super_block *sb = dir->i_sb;
> - const struct unicode_map *um = sb->s_encoding;
> - struct fscrypt_str decrypted_name = FSTR_INIT(NULL, de_name_len);
> - struct qstr entry = QSTR_INIT(de_name, de_name_len);
> - int res;
> -
> - if (IS_ENCRYPTED(dir)) {
> - const struct fscrypt_str encrypted_name =
> - FSTR_INIT((u8 *)de_name, de_name_len);
> -
> - if (WARN_ON_ONCE(!fscrypt_has_encryption_key(dir)))
> - return -EINVAL;
> -
> - decrypted_name.name = kmalloc(de_name_len, GFP_KERNEL);
> - if (!decrypted_name.name)
> - return -ENOMEM;
> - res = fscrypt_fname_disk_to_usr(dir, 0, 0, &encrypted_name,
> - &decrypted_name);
> - if (res < 0)
> - goto out;
> - entry.name = decrypted_name.name;
> - entry.len = decrypted_name.len;
> - }
> -
> - res = utf8_strncasecmp_folded(um, name, &entry);
> - /*
> - * In strict mode, ignore invalid names. In non-strict mode,
> - * fall back to treating them as opaque byte sequences.
> - */
> - if (res < 0 && !sb_has_strict_encoding(sb)) {
> - res = name->len == entry.len &&
> - memcmp(name->name, entry.name, name->len) == 0;
> - } else {
> - /* utf8_strncasecmp_folded returns 0 on match */
> - res = (res == 0);
> - }
> -out:
> - kfree(decrypted_name.name);
> - return res;
> -}
> -#endif /* CONFIG_UNICODE */
> -
> static inline int f2fs_match_name(const struct inode *dir,
> const struct f2fs_filename *fname,
> const u8 *de_name, u32 de_name_len)
> @@ -277,8 +225,10 @@ static inline int f2fs_match_name(const struct inode
> *dir,
>
> #if IS_ENABLED(CONFIG_UNICODE)
> if (fname->cf_name.name)
> - return f2fs_match_ci_name(dir, &fname->cf_name,
> - de_name, de_name_len);
> + return generic_ci_match(dir, fname->usr_fname,
> + &fname->cf_name,
> + de_name, de_name_len);
> +
> #endif
Reviewed-by: Eric Biggers <ebigg...@google.com>
- Eric
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