void
afs_osi_TraverseProcTable(void)
{
#if !defined(LINUX_KEYRING_SUPPORT) && (!defined(STRUCT_TASK_STRUCT_HAS_CRED) || defined(HAVE_LINUX_RCU_READ_LOCK))
struct task_struct *p;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) && defined(EXPORTED_TASKLIST_LOCK)
if (&tasklist_lock)
read_lock(&tasklist_lock);
#endif /* EXPORTED_TASKLIST_LOCK */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) && defined(EXPORTED_TASKLIST_LOCK)
else
#endif /* EXPORTED_TASKLIST_LOCK && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) */
rcu_read_lock();
#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16) */
#if defined(for_each_process)
for_each_process(p) if (p->pid) {
#ifdef STRUCT_TASK_STRUCT_HAS_EXIT_STATE
if (p->exit_state)
continue;
#else
if (p->state & TASK_ZOMBIE)
continue;
#endif
afs_GCPAGs_perproc_func(p);
}
#else
for_each_task(p) if (p->pid) {
#ifdef STRUCT_TASK_STRUCT_HAS_EXIT_STATE
if (p->exit_state)
continue;
#else
if (p->state & TASK_ZOMBIE)
continue;
#endif
afs_GCPAGs_perproc_func(p);
}
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) && defined(EXPORTED_TASKLIST_LOCK)
if (&tasklist_lock)
read_unlock(&tasklist_lock);
#endif /* EXPORTED_TASKLIST_LOCK */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) && defined(EXPORTED_TASKLIST_LOCK)
else
#endif /* EXPORTED_TASKLIST_LOCK && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) */
rcu_read_unlock();
#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16) */
#endif
}
void
afs_osi_TraverseProcTable(void)
{
proc_t *p;
int endchain = 0;
MP_SPINLOCK(activeproc_lock);
MP_SPINLOCK(sched_lock);
pcred_lock();
/*
* Instead of iterating through all of proc[], traverse only
* the list of active processes. As an example of this,
* see foreach_process() in sys/vm_sched.c.
*
* We hold the locks for the entire scan in order to get a
* consistent view of the current set of creds.
*/
for (p = proc; endchain == 0; p = &proc[p->p_fandx]) {
if (p->p_fandx == 0) {
endchain = 1;
}
if (system_proc(p))
continue;
mp_mtproc_lock(p);
afs_GCPAGs_perproc_func(p);
mp_mtproc_unlock(p);
}
pcred_unlock();
MP_SPINUNLOCK(sched_lock);
MP_SPINUNLOCK(activeproc_lock);
}