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Message-ID: <f69849430710020028l64379652q77e3c9428ef4de79@mail.gmail.com> Date: Tue, 2 Oct 2007 00:28:57 -0700 From: "kernel coder" <lhrkernelcoder@...il.com> To: linux-kernel@...r.kernel.org Subject: cann't dump info to user file from kernel 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@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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