nameidata data structure again

[Rajat Sharma]

Hi Mohit,

Please refer to ULK 3rd edition Section 12.5 pathname lookup, it says:

struct qstr      last         Last component of the pathname (used
when the LOOKUP_PARENT flag is set)

so if LOOKUP_PARENT is set, last refers to the last name components,
e.g. in /a/b/c it reference to c while path->dentry->qstr will refer
to b because you intended to lookup parent not the last component.
Note that path is an output parameter while last is input parameter.

Rajat



On Thu, Jan 6, 2011 at 5:18 PM, mohit verma <mohit89mlnc at gmail.com> wrote:
>
>
> ---------- Forwarded message ----------
> From: mohit verma <mohit89mlnc at gmail.com>
> Date: Thu, Jan 6, 2011 at 5:10 PM
> Subject: nameidata data structure again
> To: kernelnewbies <kernelnewbies at nl.linux.org>
>
>
> hi folks,
>
>
> we have qstr data structure part in nameidata structure in name resolution.
> so it may work like this :
>
>  nameidata->path->dentry->qstr.
>
> it  is the real name component in a  path name for that directory ro file (i
> think so).
>
> so what is  the need of having another qstr like:
>
> namidata->qstr (ie. last)
>
>
> in nameidata structure.
> sorry ,it may seem  foolish to u guys but i ............
>
> thanks in advance.
> --
> ........................
> MOHIT VERMA
>
>
>
> --
> ........................
> MOHIT VERMA
>
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