linux-kernel - [PATCH 03/12] cifs: Optimize CIFSFindFirst() response when not searching

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Message-Id: <20241231223642.15722-3-pali@kernel.org>
Date: Tue, 31 Dec 2024 23:36:33 +0100
From: Pali Rohár <pali@...nel.org>
To: Steve French <sfrench@...ba.org>,
	Paulo Alcantara <pc@...guebit.com>
Cc: linux-cifs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 03/12] cifs: Optimize CIFSFindFirst() response when not searching

When not searching for child entries with msearch wildcard pattern then ask
server just for one output entry. There is no need to ask for more entries
as we are interested only for one search result, as we are doing query on
path.

Signed-off-by: Pali Rohár <pali@...nel.org>
---
 fs/smb/client/cifssmb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c
index 7c42a0651138..c0dc404e27b3 100644
--- a/fs/smb/client/cifssmb.c
+++ b/fs/smb/client/cifssmb.c
@@ -4155,7 +4155,7 @@ CIFSFindFirst(const unsigned int xid, struct cifs_tcon *tcon,
 	pSMB->SearchAttributes =
 	    cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
 			ATTR_DIRECTORY);
-	pSMB->SearchCount = cpu_to_le16(CIFSMaxBufSize/sizeof(FILE_UNIX_INFO));
+	pSMB->SearchCount = cpu_to_le16(msearch ? CIFSMaxBufSize/sizeof(FILE_UNIX_INFO) : 1);
 	pSMB->SearchFlags = cpu_to_le16(search_flags);
 	pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
 
-- 
2.20.1