[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Re: [patch 20/20] XEN-paravirt: Add Xen virtual block device driver.
> > + > > + err = xenbus_printf(xbt, dev->nodename, > > + "ring-ref","%u", info->ring_ref); > > why do you need your own printf? xenbus_printf isn't a printf replacement - it is used for writing a formatted string into XenStore (which contains VM configuration data in a human-readable form). Internally it does a vsnprintf into a buffer and writes the resulting string to the XenStore. Cheers, Mark > > +static inline int GET_ID_FROM_FREELIST( > > does this really need screaming? > > > + > > +int blkif_ioctl(struct inode *inode, struct file *filep, > > + unsigned command, unsigned long argument) > > +{ > > + int i; > > + > > + DPRINTK_IOCTL("command: 0x%x, argument: 0x%lx, dev: 0x%04x\n", > > + command, (long)argument, inode->i_rdev); > > + > > + switch (command) { > > + case CDROMMULTISESSION: > > + DPRINTK("FIXME: support multisession CDs later\n"); > > + for (i = 0; i < sizeof(struct cdrom_multisession); i++) > > + if (put_user(0, (char __user *)(argument + i))) > > + return -EFAULT; > > + return 0; > > + > > + default: > > + /*printk(KERN_ALERT "ioctl %08x not supported by Xen blkdev\n", > > + command);*/ > > + return -EINVAL; /* same return as native Linux */ > > + } > > eh so you implement no ioctls.. why then implement the ioctl method at > all? I'm not familiar with this code... but perhaps the (fake) multisession handling is to keep userspace that queries this happy? I can't really think of anywhere this would apply off the top of my head, though. Cheers, Mark > > +static struct xenbus_driver blkfront = { > > + .name = "vbd", > > + .owner = THIS_MODULE, > > + .ids = blkfront_ids, > > + .probe = blkfront_probe, > > + .remove = blkfront_remove, > > + .resume = blkfront_resume, > > + .otherend_changed = backend_changed, > > +}; > > this can be const > > > + > > +#define DPRINTK(_f, _a...) pr_debug(_f, ## _a) > > why this silly abstraction? Just use pr_debug in the code directly > > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel -- Dave: Just a question. What use is a unicyle with no seat? And no pedals! Mark: To answer a question with a question: What use is a skateboard? Dave: Skateboards have wheels. Mark: My wheel has a wheel! _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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