/** Handler for seeking in a FAF open file.
* @author Renaud Lottiaux
*
* @param from Node sending the request
* @param msgIn Request message
*/
void handle_faf_llseek (struct rpc_desc* desc,
void *msgIn, size_t size)
{
struct faf_llseek_msg *msg = msgIn;
long r = -EINVAL;
loff_t result;
r = sys_llseek (msg->server_fd, msg->offset_high, msg->offset_low,
&result, msg->origin);
rpc_pack_type(desc, r);
rpc_pack_type(desc, result);
}
/* Compatability functions - we used to pass 5 parameters as r0, r1, r2, *r3, *(r3+4)
* We now use r0 - r4, and return an error if the old style calling standard is used.
* Eventually these functions will disappear.
*/
asmlinkage int
sys_compat_llseek (unsigned int fd, unsigned long offset_high, unsigned long offset_low,
loff_t *result, unsigned int origin, struct pt_regs *regs)
{
extern int sys_llseek (unsigned int, unsigned long, unsigned long, loff_t *, unsigned int);
if (old_calling_standard (regs)) {
printk (KERN_NOTICE "%s (%d): unsupported llseek call standard\n",
current->comm, current->pid);
return -EINVAL;
}
return sys_llseek (fd, offset_high, offset_low, result, origin);
}
/*
* 64bit lseek for UnixWare.
*/
int
uw7_lseek64(int fd, u_int off, u_int off_hi, int orig)
{
loff_t result;
int err;
if (off_hi == (u_int)-1)
off_hi = 0;
err = sys_llseek(fd, (off_t) off_hi, off, &result, orig);
if (err)
return err;
return (long)result; /* XXX: how does UnixWare return large results? */
}
/*
* local file ftell
*/
s32 nv_lfile_ftell(FILE* fp)
{
#ifdef __KERNEL__
s32 ret;
s32 seek =0;
ret = sys_llseek(fp, 0, 0, &seek, SEEK_CUR);
if(ret)
{
printf("sys_llseek error 0x%x\n",ret);
return NV_ERROR;
}
return seek;
#else
return ftell(fp);
#endif
}
W64 sys_seek(int fd, W64 offset, unsigned int origin) {
loff_t newoffs;
int rc = sys_llseek(fd, HI32(offset), LO32(offset), &newoffs, origin);
return (rc < 0) ? rc : newoffs;
}
/*
* Avoid bug in generic sys_llseek() that specifies offset_high and
* offset_low as "unsigned long", thus making it possible to pass
* a sign-extended high 32 bits in offset_low.
*/
COMPAT_SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned int, offset_high,
unsigned int, offset_low, loff_t __user *, result,
unsigned int, origin)
{
return sys_llseek(fd, offset_high, offset_low, result, origin);
}