cifs: define superblock-level cache index objects and register them

Define superblock-level cache index objects (managed by cifsTconInfo structs).
Each superblock object is created in a server-level index object and in itself
an index into which inode-level objects are inserted.

The superblock object is keyed by sharename. The UniqueId/IndexNumber is used to
validate that the exported share is the same since we accessed it last time.

Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index fe9b2f5fb492..f884cb51622a 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -807,6 +807,9 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
         if (!inode)
                 return ERR_PTR(-ENOMEM);
 
+        /* populate tcon->resource_id */
+        cifs_sb->tcon->resource_id = CIFS_I(inode)->uniqueid;
+
         if (rc && cifs_sb->tcon->ipc) {
                 cFYI(1, "ipc connection - fake read inode");
                 inode->i_mode |= S_IFDIR;