Gluster users - Nov 2016 - question about nfs lookup result

Hi all,
    I'm reading the code of 3.6.9 version and got a question.And I'm not
very familiar with the code,so I have to confirm it(I checked the master
branch,it's same with 3.6.9).

    The question is about the 'lookup' operation of NFS.And i'm with
this
code flow:

    nfs3_lookup (nfs3.c) ==> nfs3_fh_resolve_and_resume
==> nfs3_fh_resolve_root ==> nfs3_fh_resolve_resume
==> nfs3_fh_resolve_entry ==> nfs3_fh_resolve_entry_hard.

Now enter the "nfs_entry_loc_fill" and return with -1 which means the
"parent" not found,so we have to do hard resolve about the parent.
After
doing a hard resolve,we get into the callback
"nfs3_fh_resolve_inode_lookup_cbk".And
the callback has the following code:
>>> memcpy (&cs->stbuf, buf, sizeof(*buf));
>>> memcpy (&cs->postparent, buf, sizeof(*postparent))
I think we've just done a parent resolve,how could we assign the parent
result into the "stbuf" and "postparent".The later two
should be the
information of the child file/directory.Do i made a misunderstand?

Thanks advance for your help.
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Added people who know nfs code.

On Wed, Nov 16, 2016 at 6:21 PM, jin deng <cheneydeng88 at gmail.com>
wrote:
> Hi all,
>     I'm reading the code of 3.6.9 version and got a question.And
I'm not
> very familiar with the code,so I have to confirm it(I checked the master
> branch,it's same with 3.6.9).
>
>     The question is about the 'lookup' operation of NFS.And i'm
with this
> code flow:
>
>     nfs3_lookup (nfs3.c) ==> nfs3_fh_resolve_and_resume
> ==> nfs3_fh_resolve_root ==> nfs3_fh_resolve_resume
> ==> nfs3_fh_resolve_entry ==> nfs3_fh_resolve_entry_hard.
>
> Now enter the "nfs_entry_loc_fill" and return with -1 which means
the
> "parent" not found,so we have to do hard resolve about the
parent. After
> doing a hard resolve,we get into the callback
"nfs3_fh_resolve_inode_lookup_cbk".And
> the callback has the following code:
>
> >>> memcpy (&cs->stbuf, buf, sizeof(*buf));
> >>> memcpy (&cs->postparent, buf, sizeof(*postparent))
>
> I think we've just done a parent resolve,how could we assign the parent
> result into the "stbuf" and "postparent".The later two
should be the
> information of the child file/directory.Do i made a misunderstand?
>
> Thanks advance for your help.
>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users
>


-- 
Pranith
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