From 0ff83baa2069c86aa35a8081cdb6e4f4380e66a1 Mon Sep 17 00:00:00 2001 From: Nakajima Akira Date: Wed, 22 Apr 2015 15:24:44 +0900 Subject: [PATCH] Fix to check Unique id and FileType when client refer file directly. When you refer file directly on cifs client, (e.g. ls -li , cd , stat ) the function return old inode number and filetype from old inode cache, though server has different inode number or filetype. When server is Windows, cifs client has same problem. When Server is Windows , This patch fixes bug in different filetype, but does not fix bug in different inode number. Because QUERY_PATH_INFO response by Windows does not include inode number(Index Number) . BUG INFO https://bugzilla.kernel.org/show_bug.cgi?id=90021 https://bugzilla.kernel.org/show_bug.cgi?id=90031 Reported-by: Nakajima Akira Signed-off-by: Nakajima Akira Reviewed-by: Shirish Pargaonkar --- fs/cifs/inode.c | 25 +++++++++++++++++++++++++ 1 files changed, 25 insertions(+), 0 deletions(-) diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 3e126d7..0d42354 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -402,9 +402,25 @@ int cifs_get_inode_info_unix(struct inode **pinode, rc = -ENOMEM; } else { /* we already have inode, update it */ + + /* if uniqueid is different, return error */ + if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && + CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) { + rc = -ESTALE; + goto cgiiu_exit; + } + + /* if filetype is different, return error */ + if (unlikely(((*pinode)->i_mode & S_IFMT) != + (fattr.cf_mode & S_IFMT))) { + rc = -ESTALE; + goto cgiiu_exit; + } + cifs_fattr_to_inode(*pinode, &fattr); } +cgiiu_exit: return rc; } @@ -839,6 +855,15 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, if (!*inode) rc = -ENOMEM; } else { + /* we already have inode, update it */ + + /* if filetype is different, return error */ + if (unlikely(((*inode)->i_mode & S_IFMT) != + (fattr.cf_mode & S_IFMT))) { + rc = -ESTALE; + goto cgii_exit; + } + cifs_fattr_to_inode(*inode, &fattr); } -- 1.7.1