1 From: David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2 Subject: Re: [RFC][PATCH 05/10] cifs: define superblock-level cache index objects and register them
3 Date: Fri, 25 Jun 2010 14:26:52 +0100
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11 Cc: dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, Suresh Jayaraman <sjayaraman-l3A5Bk7waGM@public.gmane.org>,
12 Steve French <smfrench-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
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45 David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
47 > > > validate the root directory of the share in some way?
49 > > I don't know if there is a way to do this.
51 > Is there an inode number or something? Even the creation time might do.
53 Looking in cifspdu.h, there are a number of things that it might be possible
56 (1) FILE_ALL_INFO: CreationTime, IndexNumber, IndexNumber1, FileName
57 (assuming this isn't flattened to '\' or something for the root of a
60 (2) FILE_UNIX_BASIC_INFO: DevMajor, DevMinor, UniqueId.
62 (3) FILE_INFO_STANDARD: CreationDate, CreationTime.
64 (4) FILE_INFO_BASIC: CreationTime.
66 (5) FILE_DIRECTORY_INFO: FileIndex, CreationTime, FileName.
68 (6) SEARCH_ID_FULL_DIR_INFO: FileIndex, CreationTime, UniqueId, FileName.
70 (7) FILE_BOTH_DIRECTORY_INFO: FileIndex, CreationTime, ShortName, FileName.
72 (8) OPEN_RSP_EXT: Fid, CreationTime, VolumeGUID, FileId.
74 You may have to choose different sets of things, depending on what the server
75 has on offer. Also, don't forget, if you can't work out whether a share is
76 coherent or not from the above, you can always use LastWriteTime, ChangeTime
77 and EndOfFile and just discard the whole subtree if they differ.