From: Jeff Layton Date: Wed, 6 Oct 2010 23:51:11 +0000 (-0400) Subject: cifs: add routines to build sessions and tcons on the fly X-Git-Tag: v2.6.37-rc1~158^2~22^2~6 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9d002df492b14c690425d9785530371b6c1ccbca;p=pandora-kernel.git cifs: add routines to build sessions and tcons on the fly This patch is rather large, but it's a bit difficult to do piecemeal... For non-multiuser mounts, everything will basically work as it does today. A call to cifs_sb_tlink will return the "master" tcon link. Turn the tcon pointer in the cifs_sb into a radix tree that uses the fsuid of the process as a key. The value is a new "tcon_link" struct that contains info about a tcon that's under construction. When a new process needs a tcon, it'll call cifs_sb_tcon. That will then look up the tcon_link in the radix tree. If it exists and is valid, it's returned. If it doesn't exist, then we stuff a new tcon_link into the tree and mark it as pending and then go and try to build the session/tcon. If that works, the tcon pointer in the tcon_link is updated and the pending flag is cleared. If the construction fails, then we set the tcon pointer to an ERR_PTR and clear the pending flag. If the radix tree is searched and the tcon_link is marked pending then we go to sleep and wait for the pending flag to be cleared. Signed-off-by: Jeff Layton Signed-off-by: Steve French --- Reading git-diff-tree failed