From: Pavel Shilovsky piastryyy@gmail.com
[ Upstream commit c82e5ac7fe3570a269c0929bf7899f62048e7dbc ]
Currently the client indicates that a dentry is stale when inode numbers or type types between a local inode and a remote file don't match. If this is the case attributes is not being copied from remote to local, so, it is already known that the local copy has stale metadata. That's why the inode needs to be marked for revalidation in order to tell the VFS to lookup the dentry again before openning a file. This prevents unexpected stale errors to be returned to the user space when openning a file.
Cc: stable@vger.kernel.org Signed-off-by: Pavel Shilovsky pshilov@microsoft.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/cifs/inode.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 3d3c66fcb5ee6..0a219545940d9 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -405,6 +405,7 @@ int cifs_get_inode_info_unix(struct inode **pinode, /* if uniqueid is different, return error */ if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) { + CIFS_I(*pinode)->time = 0; /* force reval */ rc = -ESTALE; goto cgiiu_exit; } @@ -412,6 +413,7 @@ int cifs_get_inode_info_unix(struct inode **pinode, /* if filetype is different, return error */ if (unlikely(((*pinode)->i_mode & S_IFMT) != (fattr.cf_mode & S_IFMT))) { + CIFS_I(*pinode)->time = 0; /* force reval */ rc = -ESTALE; goto cgiiu_exit; } @@ -887,6 +889,7 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, /* if uniqueid is different, return error */ if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { + CIFS_I(*inode)->time = 0; /* force reval */ rc = -ESTALE; goto cgii_exit; } @@ -894,6 +897,7 @@ cifs_get_inode_info(struct inode **inode, const char *full_path, /* if filetype is different, return error */ if (unlikely(((*inode)->i_mode & S_IFMT) != (fattr.cf_mode & S_IFMT))) { + CIFS_I(*inode)->time = 0; /* force reval */ rc = -ESTALE; goto cgii_exit; }