cifs: document and cleanup dfs mount
cifs_mount() for DFS mounts is for a long time way too complex to follow, mostly because it lacks some documentation, does a lot of operations like resolving DFS roots and links, checking for path components, perform failover, crap code, etc. Besides adding some documentation to it, do some cleanup and ensure that the following is implemented and supported: * non-DFS mounts * DFS failover * DFS root mounts - tcon and cifs_sb must contain DFS path (NOT including prefix) - if prefix path, then save it in cifs_sb and it must not be changed * DFS link mounts - tcon and cifs_sb must contain DFS path (including prefix) - if prefix path, then save it in cifs_sb and it may be changed * prevent recursion on broken link referrals (MAX_NESTED_LINKS) * check every path component of the currently resolved target (including prefix), and chase them accordingly * make sure that DFS referrals go through newly resolved root servers Signed-off-by:Paulo Alcantara (SUSE) <pc@cjr.nz> Reviewed-by:
Aurelien Aptel <aaptel@suse.com> Signed-off-by:
Steve French <stfrench@microsoft.com>
parent
11375a59
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