• Steven J. Magnani's avatar
    udf: augment UDF permissions on new inodes · c3367a1b
    Steven J. Magnani authored
    Windows presents files created within Linux as read-only, even when
    permissions in Linux indicate the file should be writable.
    
    UDF defines a slightly different set of basic file permissions than Linux.
    Specifically, UDF has "delete" and "change attribute" permissions for each
    access class (user/group/other). Linux has no equivalents for these.
    
    When the Linux UDF driver creates a file (or directory), no UDF delete or
    change attribute permissions are granted. The lack of delete permission
    appears to cause Windows to mark an item read-only when its permissions
    otherwise indicate that it should be read-write.
    
    Fix this by having UDF delete permissions track Linux write permissions.
    Also grant UDF change attribute permission to the owner when creating a
    new inode.
    
    Reported by: Ty Young
    Signed-off-by: default avatarSteven J. Magnani <steve@digidescorp.com>
    Link: https://lore.kernel.org/r/20190827121359.9954-1-steve@digidescorp.comSigned-off-by: default avatarJan Kara <jack@suse.cz>
    c3367a1b