[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] modules and hypercall
Hello, I'm trying to write a module to play with hypercall. So I wrote the following module: -------------------------xvifgetinfo.c---------------- /* * xvifgetinfo.c * * The routines in this file are used to get information about virtual * network interface provide by Xen. * */ #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> #include <hypervisor-ifs/hypervisor-if.h> #include <hypervisor-ifs/network.h> /** * init_xvifgetinfo() - this function is called when module is loaded * * Description: We try to get information concerning the vif #1 * in domain #0 */ static int __init init_xvifgetinfo(void) { network_op_t netop; long res; printk(KERN_INFO "init_xvifgetinfo: Loaded\n"); netop.cmd = NETWORK_OP_VIFGETINFO; netop.u.vif_getinfo.domain = 0; netop.u.vif_getinfo.vif = 1; res = HYPERVISOR_network_op(&netop); if (res < 0) { printk(KERN_INFO "init_xvifgetinfo: HYPERVISOR_network_op error %ld\n", res) ; return res; } return 0; } /** * cleanup_xvifgetinfo() - this function is called when the module * is unloading. */ static void __exit cleanup_xvifgetinfo(void) { /* Nothing to do */ printk(KERN_INFO "init_xvifgetinfo: Unloaded\n"); } module_init(init_xvifgetinfo); module_exit(cleanup_xvifgetinfo); -------------------------xvifgetinfo.c---------------- I compiled with the following command: cc -D__KERNEL__ \ -DMODULE -I/home/guill/dcl/xeno/xeno-unstable.bk/linux-2.4.22/include \ -I/home/guill/dcl/xeno/xeno-unstable.bk/xen/include \ -Wall -c -o xvifgetinfo.o xvifgetinfo.c The following error is raised when I load the module from domain0: init_xvifgetinfo: Loaded init_xvifgetinfo: HYPERVISOR_network_op error -38 Error 38 means that function is not implemented. However, it seems that the function is implemented. Is it possible to use a module that uses hypercall? Thanks Guillaume ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/xen-devel
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