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    cifs: add new cifs_iget function and convert unix codepath to use it · cc0bad75
    Jeff Layton 提交于
    cifs: add new cifs_iget function and convert unix codepath to use it
    
    In order to unify some codepaths, introduce a common cifs_fattr struct
    for storing inode attributes. The different codepaths (unix, legacy,
    normal, etc...) can fill out this struct with inode info. It can then be
    passed as an arg to a common set of routines to get and update inodes.
    
    Add a new cifs_iget function that uses iget5_locked to identify inodes.
    This will compare inodes based on the uniqueid value in a cifs_fattr
    struct.
    
    Rather than filling out an already-created inode, have
    cifs_get_inode_info_unix instead fill out cifs_fattr and hand that off
    to cifs_iget. cifs_iget can then properly look for hardlinked inodes.
    
    On the readdir side, add a new cifs_readdir_lookup function that spawns
    populated dentries. Redefine FILE_UNIX_INFO so that it's basically a
    FILE_UNIX_BASIC_INFO that has a few fields wrapped around it. This
    allows us to more easily use the same function for filling out the fattr
    as the non-readdir codepath.
    
    With this, we should then have proper hardlink detection and can
    eventually get rid of some nasty CIFS-specific hacks for handing them.
    Signed-off-by: NJeff Layton <jlayton@redhat.com>
    Reviewed-by: NChristoph Hellwig <hch@lst.de>
    Signed-off-by: NSteve French <sfrench@us.ibm.com>
    cc0bad75
cifspdu.h 79.2 KB