commit: 221d1d797202984cb874e3ed9f1388593d34ee22
From: Jeff Layton <[email protected]>
Date: Tue, 17 May 2011 06:40:30 -0400
Subject: [PATCH] cifs: add fallback in is_path_accessible for old servers

The is_path_accessible check uses a QPathInfo call, which isn't
supported by ancient win9x era servers. Fall back to an older
SMBQueryInfo call if it fails with the magic error codes.

Cc: [email protected]
Reported-and-Tested-by: Sandro Bonazzola <[email protected]>
Signed-off-by: Jeff Layton <[email protected]>
Signed-off-by: Steve French <[email protected]>
---
 fs/cifs/connect.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 05f1dcf..277262a 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2673,6 +2673,11 @@ is_path_accessible(int xid, struct cifsTconInfo *tcon,
                              0 /* not legacy */, cifs_sb->local_nls,
                              cifs_sb->mnt_cifs_flags &
                                CIFS_MOUNT_MAP_SPECIAL_CHR);
+
+       if (rc == -EOPNOTSUPP || rc == -EINVAL)
+               rc = SMBQueryInformation(xid, tcon, full_path, pfile_info,
+                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
        kfree(pfile_info);
        return rc;
 }

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