Thanks a lot Rene and Mark,
I am in a phase of learning the Linux Device Drivers. I am trying to write a KDB module. This will add a new command in KDB to display the registered filesystem specific data. Hence I need a way to read all the registered filesystems.
Instead of exporting the function get_filesystem_list() and rebuilding the kernel. I used the other function which is exported get_fs_type(char *); ==> and in the first call to it I passed sysfs (which is the first filesystem registerd, atleast on my machine.)
I got a pointer of type file_system_type and then onwards followed the linklist to get the list of other filesystems registerd.
Regards,
Prasad
I am in a phase of learning the Linux Device Drivers. I am trying to write a KDB module. This will add a new command in KDB to display the registered filesystem specific data. Hence I need a way to read all the registered filesystems.
Instead of exporting the function get_filesystem_list() and rebuilding the kernel. I used the other function which is exported get_fs_type(char *); ==> and in the first call to it I passed sysfs (which is the first filesystem registerd, atleast on my machine.)
I got a pointer of type file_system_type and then onwards followed the linklist to get the list of other filesystems registerd.
Regards,
Prasad
On Tue, Aug 5, 2008 at 7:28 AM, Mark Brown <markb@xxxxxxxxxxxxxxxxxxxxx> wrote:
That is true [ I missed that tiny detail ;-) ] in either case you would need create a custom kernel with the function exported with EXPORT_SYMBOL().
Why do you need to obtain a list of available filesystems from a driver? Shouldn't you handle this in an application instead?
Best Regards,
-- Mark
On Aug 3, 2008, at 10:04 PM, Rene Herman wrote:
On 04-08-08 03:59, Prasad Joshi wrote:
I am using 2.6.26 kernel.
Can you please explain, why you specifically mentioned the kernel 2.6.24 or below? What is difference between 2.6.24 kernel and latest kernel in this regards?
Only that the get_filesystem_list() prototype is not in <linux/fs.h> in 2.6.24 so that you need to declare it extern before using it yourself. The advice wasn't applicable though, given that you have the prototype in linux/fs.h. That EXPORT_SYMBOL() thing is the only thing relevant.
Rene.
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