cifs: don't pass superblock to cifs_mount()

To close sget() races we'll need to be able to set cifs_sb up before
we get the superblock, so we'll want to be able to do cifs_mount()
earlier.  Fortunately, it's easy to do - setting ->s_maxbytes can
be done in cifs_read_super(), ditto for ->s_time_gran and as for
putting MS_POSIXACL into ->s_flags, we can mirror it in ->mnt_cifs_flags
until cifs_read_super() is called.  Kill unused 'devname' argument,
while we are at it...

Acked-by: Pavel Shilovsky <piastryyy@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 12 insertions, 1 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index bfab2bc83726..8f7451f3c8e6 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -116,7 +116,7 @@ cifs_read_super(struct super_block *sb, struct smb_vol *volume_info,
         spin_lock_init(&cifs_sb->tlink_tree_lock);
         cifs_sb->tlink_tree = RB_ROOT;
 
-        rc = cifs_mount(sb, cifs_sb, volume_info, devname);
+        rc = cifs_mount(cifs_sb, volume_info);
 
         if (rc) {
                 if (!silent)
@@ -124,6 +124,17 @@ cifs_read_super(struct super_block *sb, struct smb_vol *volume_info,
                 return rc;
         }
 
+        if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
+                sb->s_flags |= MS_POSIXACL;
+
+        if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
+                sb->s_maxbytes = MAX_LFS_FILESIZE;
+        else
+                sb->s_maxbytes = MAX_NON_LFS;
+
+        /* BB FIXME fix time_gran to be larger for LANMAN sessions */
+        sb->s_time_gran = 100;
+
         sb->s_magic = CIFS_MAGIC_NUMBER;
         sb->s_op = &cifs_super_ops;
         sb->s_bdi = &cifs_sb->bdi;