Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753319AbXJBH3O (ORCPT ); Tue, 2 Oct 2007 03:29:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751317AbXJBH27 (ORCPT ); Tue, 2 Oct 2007 03:28:59 -0400 Received: from nf-out-0910.google.com ([64.233.182.189]:2789 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751125AbXJBH26 (ORCPT ); Tue, 2 Oct 2007 03:28:58 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=Jrgbxhndba8sfs6Vq7In/Xs0Ibg+NwnONR7gSnS3N6zdDdxs0/5SCLjeY9Dy5mlwbrJlzSRPG3g6wQB2LTsYEnQmZweESjkPncKjbFmc5ZASjpq20oapRI84gP5pqRkf7dH13sJ39RhiZiKU3+uSe2KuUj6Pv/tVP4j5RVQjq7g= Message-ID: Date: Tue, 2 Oct 2007 00:28:57 -0700 From: "kernel coder" To: linux-kernel@vger.kernel.org Subject: cann't dump info to user file from kernel MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1775 Lines: 61 hi, I'm trying to dump some information from dev.c to user space file.Following is the code which i'm using to write to user spcae file.I'm using 2.6.22.x86_64 kernel. #define _write(f, buf, sz) (f->f_op->write(f, buf, sz, &f->f_pos)) #define WRITABLE(f) (f->f_op && f->f_op->write) int write_to_file(char *logfile, char *buf,int size) { int ret = 0; struct file *f=NULL; mm_segment_t old_fs = get_fs(); set_fs(get_ds()); f = filp_open(logfile, O_CREAT|O_APPEND,00600); if(IS_ERR(f)){ DPRINT("Error %ld openeing %s\n",-PTR_ERR(f), logfile); ret = -1; } else { if (WRITABLE(f)) _write(f, buf, size); else { DPRINT("%s does not have a write method\n", logfile); ret = -1; } if ((ret = filp_close(f,NULL))) DPRINT("Error %d closing %s\n", -ret, logfile); } END_KMEM; return ret; } I'm calling this function from netif_recieve_skb in dev.c int netif_recieve_skb(struct sk_buff *skb){ --------------------- write_to_file("/root/kernel_log","hello_world",12); ---------------------- } But whenever this function is called ,the kernel simply halts.Please tell me what might be the reason. I just want to dump some information to user spcace file from dev.c .Is there some better way to do it. thanks, shahzad - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/