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 [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
