--- /dev/null
+From: Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>
+Subject: Re: [RFC][PATCH 05/10] cifs: define superblock-level cache index
+ objects and register them
+Date: Fri, 25 Jun 2010 18:14:16 +0530
+Lines: 41
+Message-ID: <4C24A4A0.90408@suse.de>
+References: <1277220206-3559-1-git-send-email-sjayaraman@suse.de> <yes> <9720.1277312290@redhat.com>
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+Cc: Steve French <smfrench-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
+ linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
+To: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
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+
+On 06/23/2010 10:28 PM, David Howells wrote:
+> Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org> wrote:
+>
+>> 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.
+>>
+>> Currently, the superblock objects are keyed by sharename.
+>
+> Seems reasonable. Is there any way you can check that the share you are
+> looking at on a server is the same as the last time you looked? Can you
+
+Good point.
+
+I thought of using TID (Tree identifier; a unique ID for a resource in
+use by client) along with sharename. But, Server is free to reuse them
+when the tree connection closes and does not guarantee the same Tid for
+a particular resource across tree connections.
+
+Also, considering the UNC name of the resource (//server/share) may not
+be a good idea too as the cache will not be used when for e.g. IPaddress
+is used to mount.
+
+So, if a server does something like this:
+ - export a share 'foo' (original server path: /export/vol1/foo)
+ - client mounts and uses it
+ - server unexports the share 'foo'
+ - server exports 'foo' (original sever path: /export/vol2/foo)
+
+we have a bit of problem..
+
+> validate the root directory of the share in some way?
+>
+
+I don't know if there is a way to do this.
+
+Thanks,
+
+
+--
+Suresh Jayaraman
+
+
projects / notmuch / blobdiff