linux-kernel - Re: [PATCH 2.6.24-mm1 8/8] (resend) IPC: consolidate all xxxctl

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Date:	Tue, 4 Mar 2008 16:03:23 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	pierre.peiffer@...l.net
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.24-mm1 8/8] (resend) IPC: consolidate all
 xxxctl_down() functions

Hi,
kernel-doc here causes a warning in 2.6.25-rc3-mm1:

Warning(linux-2.6.25-rc3-mm1//ipc/util.c:845): No description found for parameter 'extrat_perm'



On Tue, 12 Feb 2008 17:13:48 +0100 pierre.peiffer@...l.net wrote:

> Index: b/ipc/util.c
> ===================================================================
> --- a/ipc/util.c
> +++ b/ipc/util.c
> @@ -824,6 +824,57 @@ void ipc_update_perm(struct ipc64_perm *
>  		| (in->mode & S_IRWXUGO);
>  }
>  
> +/**
> + * ipcctl_pre_down - retrieve an ipc and check permissions for some IPC_XXX cmd
> + * @ids:  the table of ids where to look for the ipc
> + * @id:   the id of the ipc to retrieve
> + * @cmd:  the cmd to check
> + * @perm: the permission to set
> + * @extra_perm: one extra permission parameter used by msq

change this ^^^^^ or ... (preferably the next changes)

> + *
> + * This function does some common audit and permissions check for some IPC_XXX
> + * cmd and is called from semctl_down, shmctl_down and msgctl_down.
> + * It must be called without any lock held and
> + *  - retrieves the ipc with the given id in the given table.
> + *  - performs some audit and permission check, depending on the given cmd
> + *  - returns the ipc with both ipc and rw_mutex locks held in case of success
> + *    or an err-code without any lock held otherwise.
> + */
> +struct kern_ipc_perm *ipcctl_pre_down(struct ipc_ids *ids, int id, int cmd,
> +				      struct ipc64_perm *perm, int extrat_perm)

that last parameter and ...

> +{
...
> +}
> +
>  #ifdef __ARCH_WANT_IPC_PARSE_VERSION
>  
>  
> Index: b/ipc/util.h
> ===================================================================
> --- a/ipc/util.h
> +++ b/ipc/util.h
> @@ -113,6 +113,8 @@ struct kern_ipc_perm *ipc_lock(struct ip
>  void kernel_to_ipc64_perm(struct kern_ipc_perm *in, struct ipc64_perm *out);
>  void ipc64_perm_to_ipc_perm(struct ipc64_perm *in, struct ipc_perm *out);
>  void ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out);
> +struct kern_ipc_perm *ipcctl_pre_down(struct ipc_ids *ids, int id, int cmd,
> +				      struct ipc64_perm *perm, int extrat_perm);

that last parameter.

>  
>  #if defined(__ia64__) || defined(__x86_64__) || defined(__hppa__) || defined(__XTENSA__)
>    /* On IA-64, we always use the "64-bit version" of the IPC structures.  */ 


---
~Randy
--
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