Eric Lee / smarc-fsl-linux-kernel

19 May, 2011

2 commits

  • c4aca0c09   cifs: Change key name to cifs.idmap, misc. clean-up ... Browse Code »

    Change idmap key name from cifs.cifs_idmap to cifs.idmap.
    Removed unused structure wksidarr and function match_sid().
    Handle errors correctly in function init_cifs().

    Signed-off-by: Shirish Pargaonkar
    Reviewed-by: Jeff Layton
    Signed-off-by: Steve French

    Shirish Pargaonkar
     
  • 9409ae58e   cifs: Invoke id mapping functions (try #17 repost) ... Browse Code »

    rb tree search and insertion routines.

    A SID which needs to be mapped, is looked up in one of the rb trees
    depending on whether SID is either owner or group SID.
    If found in the tree, a (mapped) id from that node is assigned to
    uid or gid as appropriate. If unmapped, an upcall is attempted to
    map the SID to an id. If upcall is successful, node is marked as
    mapped. If upcall fails, node stays marked as unmapped and a mapping
    is attempted again only after an arbitrary time period has passed.

    To map a SID, which can be either a Owner SID or a Group SID, key
    description starts with the string "os" or "gs" followed by SID converted
    to a string. Without "os" or "gs", cifs.upcall does not know whether
    SID needs to be mapped to either an uid or a gid.

    Nodes in rb tree have fields to prevent multiple upcalls for
    a SID. Searching, adding, and removing nodes is done within global locks.
    Whenever a node is either found or inserted in a tree, a reference
    is taken on that node.
    Shrinker routine prunes a node if it has expired but does not prune
    an expired node if its refcount is not zero (i.e. sid/id of that node
    is_being/will_be accessed).
    Thus a node, if its SID needs to be mapped by making an upcall,
    can safely stay and its fields accessed without shrinker pruning it.
    A reference (refcount) is put on the node without holding the spinlock
    but a reference is get on the node by holding the spinlock.

    Every time an existing mapped node is accessed or mapping is attempted,
    its timestamp is updated to prevent it from getting erased or a
    to prevent multiple unnecessary repeat mapping retries respectively.

    For now, cifs.upcall is only used to map a SID to an id (uid or gid) but
    it would be used to obtain an SID for an id.

    Signed-off-by: Shirish Pargaonkar
    Reviewed-by: Jeff Layton
    Signed-off-by: Steve French

    Shirish Pargaonkar
     

07 Dec, 2010

1 commit

  • 79df1baee   cifs: fix use of CONFIG_CIFS_ACL ... Browse Code »

    Some of the code under CONFIG_CIFS_ACL is dependent upon code under
    CONFIG_CIFS_EXPERIMENTAL, but the Kconfig options don't reflect that
    dependency. Move more of the ACL code out from under
    CONFIG_CIFS_EXPERIMENTAL and under CONFIG_CIFS_ACL.

    Also move find_readable_file out from other any sort of Kconfig
    option and make it a function normally compiled in.

    Reported-and-Acked-by: Randy Dunlap
    Signed-off-by: Jeff Layton
    Signed-off-by: Steve French

    Jeff Layton
     

10 Apr, 2008

1 commit

06 Nov, 2007

1 commit

26 Oct, 2007

1 commit

24 Oct, 2007

1 commit

18 Oct, 2007

1 commit

17 Oct, 2007

1 commit

15 Oct, 2007

1 commit

12 Oct, 2007

1 commit

04 Oct, 2007

1 commit

02 Oct, 2007

1 commit

26 Sep, 2007

1 commit

25 Sep, 2007

1 commit

29 Sep, 2006

1 commit

14 Jan, 2006

1 commit

09 Jan, 2006

1 commit

02 Dec, 2005

1 commit