int sem_down(struct proc *p, int sem)
{
if (sem < 0) {
fprintf(stderr, "sem_down: Invalid semaphor (pid %u)\n", p->pid);
return 1;
}
switch (sem_p(sem)) {
case -1:
fprintf(stderr, "sem_down: error putting semaphor down (pid %u)\n", p->pid);
return 1;
case 0:
return 0;
case 1:
if (retry_op(p) != 0) {
fprintf(stderr, "sem_down: error resetting IC (pid %u)\n", p->pid);
return 1;
}
sched_suspend(p->pid);
if (insert_proc(&sem_wq[sem], p) != 0) {
fprintf(stderr, "sem_down: error adding self to wait queue (pid %u)\n", p->pid);
return 1;
}
return 0;
default:
fprintf(stderr, "sem_down: unexpected value returned from p() (pid %u)\n", p->pid);
return 1;
}
}
static int init_libcfs_module(void)
{
int rc;
libcfs_arch_init();
libcfs_init_nidstrings();
cfs_init_rwsem(&cfs_tracefile_sem);
cfs_init_mutex(&cfs_trace_thread_sem);
cfs_init_rwsem(&ioctl_list_sem);
CFS_INIT_LIST_HEAD(&ioctl_list);
rc = libcfs_debug_init(5 * 1024 * 1024);
if (rc < 0) {
printk(CFS_KERN_ERR "LustreError: libcfs_debug_init: %d\n", rc);
return (rc);
}
#if LWT_SUPPORT
rc = lwt_init();
if (rc != 0) {
CERROR("lwt_init: error %d\n", rc);
goto cleanup_debug;
}
#endif
rc = cfs_psdev_register(&libcfs_dev);
if (rc) {
CERROR("misc_register: error %d\n", rc);
goto cleanup_lwt;
}
rc = cfs_wi_startup();
if (rc) {
CERROR("startup workitem: error %d\n", rc);
goto cleanup_deregister;
}
rc = insert_proc();
if (rc) {
CERROR("insert_proc: error %d\n", rc);
goto cleanup_wi;
}
CDEBUG (D_OTHER, "portals setup OK\n");
return (0);
cleanup_wi:
cfs_wi_shutdown();
cleanup_deregister:
cfs_psdev_deregister(&libcfs_dev);
cleanup_lwt:
#if LWT_SUPPORT
lwt_fini();
cleanup_debug:
#endif
libcfs_debug_cleanup();
return rc;
}
INT32 AddProc(PROC_ID pid, ProcInfo proc_info) {
if(check_AddProc_parm(pid, proc_info)) {
printf("check_AddProc_parm fail\n");
return API_RTN_ERROR;
}
Task_Struct * pTask_Struct_temp = create_task_struct(pid, proc_info);
if(insert_proc(pTask_Struct_temp)) {
printf("insert_proc fail\n");
return API_RTN_ERROR;
}
return API_RTN_OK;
}
static int init_libcfs_module(void)
{
int rc;
libcfs_arch_init();
libcfs_init_nidstrings();
init_rwsem(&cfs_tracefile_sem);
mutex_init(&cfs_trace_thread_mutex);
init_rwsem(&ioctl_list_sem);
CFS_INIT_LIST_HEAD(&ioctl_list);
init_waitqueue_head(&cfs_race_waitq);
rc = libcfs_debug_init(5 * 1024 * 1024);
if (rc < 0) {
printk(KERN_ERR "LustreError: libcfs_debug_init: %d\n", rc);
return (rc);
}
rc = cfs_cpu_init();
if (rc != 0)
goto cleanup_debug;
#if LWT_SUPPORT
rc = lwt_init();
if (rc != 0) {
CERROR("lwt_init: error %d\n", rc);
goto cleanup_debug;
}
#endif
rc = misc_register(&libcfs_dev);
if (rc) {
CERROR("misc_register: error %d\n", rc);
goto cleanup_lwt;
}
rc = cfs_wi_startup();
if (rc) {
CERROR("initialize workitem: error %d\n", rc);
goto cleanup_deregister;
}
/* max to 4 threads, should be enough for rehash */
rc = min(cfs_cpt_weight(cfs_cpt_table, CFS_CPT_ANY), 4);
rc = cfs_wi_sched_create("cfs_rh", cfs_cpt_table, CFS_CPT_ANY,
rc, &cfs_sched_rehash);
if (rc != 0) {
CERROR("Startup workitem scheduler: error: %d\n", rc);
goto cleanup_deregister;
}
rc = cfs_crypto_register();
if (rc) {
CERROR("cfs_crypto_regster: error %d\n", rc);
goto cleanup_wi;
}
rc = insert_proc();
if (rc) {
CERROR("insert_proc: error %d\n", rc);
goto cleanup_crypto;
}
CDEBUG (D_OTHER, "portals setup OK\n");
return 0;
cleanup_crypto:
cfs_crypto_unregister();
cleanup_wi:
cfs_wi_shutdown();
cleanup_deregister:
misc_deregister(&libcfs_dev);
cleanup_lwt:
#if LWT_SUPPORT
lwt_fini();
#endif
cleanup_debug:
libcfs_debug_cleanup();
return rc;
}
