linux-ext4 - [PATCH 4/5] ext4: Simplify hash check on ext4

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Message-Id: <20220322030004.148560-5-krisman@collabora.com>
Date:   Mon, 21 Mar 2022 23:00:03 -0400
From:   Gabriel Krisman Bertazi <krisman@...labora.com>
To:     tytso@....edu
Cc:     ebiggers@...nel.org, jaegeuk@...nel.org,
        linux-ext4@...r.kernel.org,
        Gabriel Krisman Bertazi <krisman@...labora.com>,
        kernel@...labora.com
Subject: [PATCH 4/5] ext4: Simplify hash check on ext4_match

The existence of fname->cf_name.name requires s_encoding & IS_CASEFOLDED,
therefore this can be simplified.

Signed-off-by: Gabriel Krisman Bertazi <krisman@...labora.com>
---
 fs/ext4/namei.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 71b4b05fae89..8520115cd5c2 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1442,19 +1442,13 @@ static bool ext4_match(struct inode *parent,
 #if IS_ENABLED(CONFIG_UNICODE)
 	f.cf_name = fname->cf_name;
 
-	if (parent->i_sb->s_encoding && IS_CASEFOLDED(parent) &&
-	    (!IS_ENCRYPTED(parent) || fscrypt_has_encryption_key(parent))) {
-		if (fname->cf_name.name) {
-			if (IS_ENCRYPTED(parent)) {
-				if (fname->hinfo.hash != EXT4_DIRENT_HASH(de) ||
-					fname->hinfo.minor_hash !=
-						EXT4_DIRENT_MINOR_HASH(de)) {
-
-					return false;
-				}
-			}
-		}
+	if (IS_ENCRYPTED(parent) && fname->cf_name.name) {
+		if (fname->hinfo.hash != EXT4_DIRENT_HASH(de) ||
+		    fname->hinfo.minor_hash != EXT4_DIRENT_MINOR_HASH(de))
+			return false;
+	}
 
+	if (parent->i_sb->s_encoding && IS_CASEFOLDED(parent)) {
 		ret = ext4_ci_compare(parent, &f, de->name, de->name_len);
 		if (ret < 0) {
 			/*
-- 
2.35.1