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cifs: check for smb1 in open_cached_dir()

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Check protocol version in open_cached_dir() and return not supported
for SMB1.  This allows us to call open_cached_dir() from code that
is common to both smb1 and smb2/3 in future patches without having to
do this check in the call-site.
At the same time, add a check if tcon is valid or not for the same reason.

Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Reviewed-by: Enzo Matsumiya <ematsumiya@suse.de>
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2022-05-10 09:42:05 +10:00 committed by Steve French
parent f695b28935
commit 198bf836df
1 changed files with 2 additions and 1 deletions
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3
fs/cifs/smb2ops.c
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@ -776,7 +776,8 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *pfid;
struct dentry *dentry;
if (tcon->nohandlecache)
if (tcon == NULL || tcon->nohandlecache ||
is_smb1_server(tcon->ses->server))
return -ENOTSUPP;
if (cifs_sb->root == NULL)