Xiu-Yan Wang wrote:
> Hi Darren,
>
> Darren J Moffat wrote:
>> yang wrote:
>>> Hi all,
>>> when define _KERNEL, I use:
>>> FILE * fp;
>>> fp=fileopen("path","w");
>> I assume you mean fopen(). That is a stdio interface which exists only
>> in userland via libc.
>>
>> When you say you defined _KERNEL are you actually building a kernel
>> module ? If not then you should not define _KERNEL.
>>
>>> So in C files , how can I open a fild and write something into it in
>>> _KERNEL stat?
>> It is quite difficult and usually avoided to read files in the kernel.
>> Instead a userland helper program is often used to read and parse the
>> file into structured content and pass it over an ioctl or syscall to the
>> kernel driver.
>
> There does have the requirement to read files in the kernel.
>
> We're working on a 10Gb Ethernet driver and we want to let the driver
> update the firmware on-the-fly if needed when the driver is loaded.
> Save the firmware image in a separate file and let the driver read it
> with kobj_open_file() should be an option. But kobj_open_file() is not a
> stable interface. So what's the best practice for the task like this?
In that case I strongly suggest you work on extending the existing
fwflash program and infrastructure to support your device class rather
than inventing yet another firmware download capability for
Solaris/OpenSolaris.
--
Darren J Moffat
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