Re: fanotify - overall design before I start sending patches

[Douglas Leeder <douglas.leeder@sophos.com>]

> On Friday 24 July 2009 21:13:49 Eric Paris wrote:
>> After the socket is bound events are attained using the read() syscall
>> (recv* probably also works haven't tested).  This will result in the
>> buffer being filled with one or more events like this:
>>
>> struct fanotify_event_metadata {
>>         __u32 event_len;
>>         __s32 fd;
>>         __u32 mask;
>>         __u32 f_flags;
>>         __s32 pid;
>>         __s32 tgid;
>>         __u64 cookie;
>> }  __attribute__((packed));
>>
>> fd specifies the new file descriptor that was created in the context of
>> the listener.  (readlink of /proc/self/fd will give you A pathname)
>> mask indicates the events type (bitwise OR of the event types listed
>> above).  f_flags here is the f_flags the ORIGINAL process has the file
>> open with.  pid and tgid are from the original process.  cookie is used
>> when the listener needs to allow, deny, or delay the operation.
> 

One thing that's come up recently that we can't detect with Talpa:

Can fanotify differentiate between an execute and a normal open for reading?

If it can differentiate, could it send that information in the
event_metadata?

-- 
Douglas Leeder