From: Ralph Boehme <slow@samba.org>
Date: Mon, 25 Nov 2024 15:19:56 +0000 (+0100)
Subject: fs/smb/client: cifs_prime_dcache() for SMB3 POSIX reparse points
X-Git-Tag: v6.13-rc2~6^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8cb0bc5436351de8a11eef13b7367d64cc0d6c68;p=thirdparty%2Flinux.git

fs/smb/client: cifs_prime_dcache() for SMB3 POSIX reparse points

Spares an extra revalidation request

Cc: stable@vger.kernel.org
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
---

diff --git a/fs/smb/client/readdir.c b/fs/smb/client/readdir.c
index f878bcdbd3198..b906bf78af1ec 100644
--- a/fs/smb/client/readdir.c
+++ b/fs/smb/client/readdir.c
@@ -71,6 +71,8 @@ cifs_prime_dcache(struct dentry *parent, struct qstr *name,
 	struct inode *inode;
 	struct super_block *sb = parent->d_sb;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+	bool posix = cifs_sb_master_tcon(cifs_sb)->posix_extensions;
+	bool reparse_need_reval = false;
 	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 	int rc;
 
@@ -85,7 +87,21 @@ cifs_prime_dcache(struct dentry *parent, struct qstr *name,
 		 * this spares us an invalidation.
 		 */
 retry:
-		if ((fattr->cf_cifsattrs & ATTR_REPARSE) ||
+		if (posix) {
+			switch (fattr->cf_mode & S_IFMT) {
+			case S_IFLNK:
+			case S_IFBLK:
+			case S_IFCHR:
+				reparse_need_reval = true;
+				break;
+			default:
+				break;
+			}
+		} else if (fattr->cf_cifsattrs & ATTR_REPARSE) {
+			reparse_need_reval = true;
+		}
+
+		if (reparse_need_reval ||
 		    (fattr->cf_flags & CIFS_FATTR_NEED_REVAL))
 			return;