+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-#define DEBUG_SUBSYSTEM S_LNET
-
-#include <lnet/lib-lnet.h>
-#include <lnet/lnet.h>
-#include <libcfs/kp30.h>
-#include "tracefile.h"
-
-void
-kportal_memhog_free (struct libcfs_device_userstate *ldu)
-{
- cfs_page_t **level0p = &ldu->ldu_memhog_root_page;
- cfs_page_t **level1p;
- cfs_page_t **level2p;
- int count1;
- int count2;
-
- if (*level0p != NULL) {
-
- level1p = (cfs_page_t **)cfs_page_address(*level0p);
- count1 = 0;
-
- while (count1 < CFS_PAGE_SIZE/sizeof(cfs_page_t *) &&
- *level1p != NULL) {
-
- level2p = (cfs_page_t **)cfs_page_address(*level1p);
- count2 = 0;
-
- while (count2 < CFS_PAGE_SIZE/sizeof(cfs_page_t *) &&
- *level2p != NULL) {
-
- cfs_free_page(*level2p);
- ldu->ldu_memhog_pages--;
- level2p++;
- count2++;
- }
-
- cfs_free_page(*level1p);
- ldu->ldu_memhog_pages--;
- level1p++;
- count1++;
- }
-
- cfs_free_page(*level0p);
- ldu->ldu_memhog_pages--;
-
- *level0p = NULL;
- }
-
- LASSERT (ldu->ldu_memhog_pages == 0);
-}
-
-int
-kportal_memhog_alloc (struct libcfs_device_userstate *ldu, int npages, int flags)
-{
- cfs_page_t **level0p;
- cfs_page_t **level1p;
- cfs_page_t **level2p;
- int count1;
- int count2;
-
- LASSERT (ldu->ldu_memhog_pages == 0);
- LASSERT (ldu->ldu_memhog_root_page == NULL);
-
- if (npages < 0)
- return -EINVAL;
-
- if (npages == 0)
- return 0;
-
- level0p = &ldu->ldu_memhog_root_page;
- *level0p = cfs_alloc_page(flags);
- if (*level0p == NULL)
- return -ENOMEM;
- ldu->ldu_memhog_pages++;
-
- level1p = (cfs_page_t **)cfs_page_address(*level0p);
- count1 = 0;
- memset(level1p, 0, CFS_PAGE_SIZE);
-
- while (ldu->ldu_memhog_pages < npages &&
- count1 < CFS_PAGE_SIZE/sizeof(cfs_page_t *)) {
-
- if (cfs_signal_pending())
- return (-EINTR);
-
- *level1p = cfs_alloc_page(flags);
- if (*level1p == NULL)
- return -ENOMEM;
- ldu->ldu_memhog_pages++;
-
- level2p = (cfs_page_t **)cfs_page_address(*level1p);
- count2 = 0;
- memset(level2p, 0, CFS_PAGE_SIZE);
-
- while (ldu->ldu_memhog_pages < npages &&
- count2 < CFS_PAGE_SIZE/sizeof(cfs_page_t *)) {
-
- if (cfs_signal_pending())
- return (-EINTR);
-
- *level2p = cfs_alloc_page(flags);
- if (*level2p == NULL)
- return (-ENOMEM);
- ldu->ldu_memhog_pages++;
-
- level2p++;
- count2++;
- }
-
- level1p++;
- count1++;
- }
-
- return 0;
-}
-
-/* called when opening /dev/device */
-static int libcfs_psdev_open(unsigned long flags, void *args)
-{
- struct libcfs_device_userstate *ldu;
- ENTRY;
-
- PORTAL_MODULE_USE;
-
- LIBCFS_ALLOC(ldu, sizeof(*ldu));
- if (ldu != NULL) {
- ldu->ldu_memhog_pages = 0;
- ldu->ldu_memhog_root_page = NULL;
- }
- *(struct libcfs_device_userstate **)args = ldu;
-
- RETURN(0);
-}
-
-/* called when closing /dev/device */
-static int libcfs_psdev_release(unsigned long flags, void *args)
-{
- struct libcfs_device_userstate *ldu;
- ENTRY;
-
- ldu = (struct libcfs_device_userstate *)args;
- if (ldu != NULL) {
- kportal_memhog_free(ldu);
- LIBCFS_FREE(ldu, sizeof(*ldu));
- }
-
- PORTAL_MODULE_UNUSE;
- RETURN(0);
-}
-
-static struct rw_semaphore ioctl_list_sem;
-static struct list_head ioctl_list;
-
-int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand)
-{
- int rc = 0;
-
- down_write(&ioctl_list_sem);
- if (!list_empty(&hand->item))
- rc = -EBUSY;
- else
- list_add_tail(&hand->item, &ioctl_list);
- up_write(&ioctl_list_sem);
-
- return rc;
-}
-EXPORT_SYMBOL(libcfs_register_ioctl);
-
-int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand)
-{
- int rc = 0;
-
- down_write(&ioctl_list_sem);
- if (list_empty(&hand->item))
- rc = -ENOENT;
- else
- list_del_init(&hand->item);
- up_write(&ioctl_list_sem);
-
- return rc;
-}
-EXPORT_SYMBOL(libcfs_deregister_ioctl);
-
-static int libcfs_ioctl(struct cfs_psdev_file *pfile, unsigned long cmd, void *arg)
-{
- char buf[1024];
- int err = -EINVAL;
- struct libcfs_ioctl_data *data;
- ENTRY;
-
- /* 'cmd' and permissions get checked in our arch-specific caller */
-
- if (libcfs_ioctl_getdata(buf, buf + 800, (void *)arg)) {
- CERROR("PORTALS ioctl: data error\n");
- RETURN(-EINVAL);
- }
- data = (struct libcfs_ioctl_data *)buf;
-
- switch (cmd) {
- case IOC_LIBCFS_CLEAR_DEBUG:
- libcfs_debug_clear_buffer();
- RETURN(0);
- /*
- * case IOC_LIBCFS_PANIC:
- * Handled in arch/cfs_module.c
- */
- case IOC_LIBCFS_MARK_DEBUG:
- if (data->ioc_inlbuf1 == NULL ||
- data->ioc_inlbuf1[data->ioc_inllen1 - 1] != '\0')
- RETURN(-EINVAL);
- libcfs_debug_mark_buffer(data->ioc_inlbuf1);
- RETURN(0);
-#if LWT_SUPPORT
- case IOC_LIBCFS_LWT_CONTROL:
- err = lwt_control ((data->ioc_flags & 1) != 0,
- (data->ioc_flags & 2) != 0);
- break;
-
- case IOC_LIBCFS_LWT_SNAPSHOT: {
- cycles_t now;
- int ncpu;
- int total_size;
-
- err = lwt_snapshot (&now, &ncpu, &total_size,
- data->ioc_pbuf1, data->ioc_plen1);
- data->ioc_u64[0] = now;
- data->ioc_u32[0] = ncpu;
- data->ioc_u32[1] = total_size;
-
- /* Hedge against broken user/kernel typedefs (e.g. cycles_t) */
- data->ioc_u32[2] = sizeof(lwt_event_t);
- data->ioc_u32[3] = offsetof(lwt_event_t, lwte_where);
-
- if (err == 0 &&
- libcfs_ioctl_popdata(arg, data, sizeof (*data)))
- err = -EFAULT;
- break;
- }
-
- case IOC_LIBCFS_LWT_LOOKUP_STRING:
- err = lwt_lookup_string (&data->ioc_count, data->ioc_pbuf1,
- data->ioc_pbuf2, data->ioc_plen2);
- if (err == 0 &&
- libcfs_ioctl_popdata(arg, data, sizeof (*data)))
- err = -EFAULT;
- break;
-#endif
- case IOC_LIBCFS_MEMHOG:
- if (pfile->private_data == NULL) {
- err = -EINVAL;
- } else {
- kportal_memhog_free(pfile->private_data);
- /* XXX The ioc_flags is not GFP flags now, need to be fixed */
- err = kportal_memhog_alloc(pfile->private_data,
- data->ioc_count,
- data->ioc_flags);
- if (err != 0)
- kportal_memhog_free(pfile->private_data);
- }
- break;
-
- case IOC_LIBCFS_PING_TEST: {
- extern void (kping_client)(struct libcfs_ioctl_data *);
- void (*ping)(struct libcfs_ioctl_data *);
-
- CDEBUG(D_IOCTL, "doing %d pings to nid %s (%s)\n",
- data->ioc_count, libcfs_nid2str(data->ioc_nid),
- libcfs_nid2str(data->ioc_nid));
- ping = PORTAL_SYMBOL_GET(kping_client);
- if (!ping)
- CERROR("PORTAL_SYMBOL_GET failed\n");
- else {
- ping(data);
- PORTAL_SYMBOL_PUT(kping_client);
- }
- RETURN(0);
- }
-
- default: {
- struct libcfs_ioctl_handler *hand;
- err = -EINVAL;
- down_read(&ioctl_list_sem);
- list_for_each_entry(hand, &ioctl_list, item) {
- err = hand->handle_ioctl(cmd, data);
- if (err != -EINVAL) {
- if (err == 0)
- err = libcfs_ioctl_popdata(arg,
- data, sizeof (*data));
- break;
- }
- }
- up_read(&ioctl_list_sem);
- break;
- }
- }
-
- RETURN(err);
-}
-
-struct cfs_psdev_ops libcfs_psdev_ops = {
- libcfs_psdev_open,
- libcfs_psdev_release,
- NULL,
- NULL,
- libcfs_ioctl
-};
-
-extern int insert_proc(void);
-extern void remove_proc(void);
-MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
-MODULE_DESCRIPTION("Portals v3.1");
-MODULE_LICENSE("GPL");
-
-extern cfs_psdev_t libcfs_dev;
-extern struct rw_semaphore tracefile_sem;
-extern struct semaphore trace_thread_sem;
-
-extern void libcfs_init_nidstrings(void);
-extern int libcfs_arch_init(void);
-extern void libcfs_arch_cleanup(void);
-
-static int init_libcfs_module(void)
-{
- int rc;
-
- libcfs_arch_init();
- libcfs_init_nidstrings();
- init_rwsem(&tracefile_sem);
- init_mutex(&trace_thread_sem);
- init_rwsem(&ioctl_list_sem);
- CFS_INIT_LIST_HEAD(&ioctl_list);
-
- rc = libcfs_debug_init(5 * 1024 * 1024);
- if (rc < 0) {
- printk(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 = insert_proc();
- if (rc) {
- CERROR("insert_proc: error %d\n", rc);
- goto cleanup_deregister;
- }
-
- CDEBUG (D_OTHER, "portals setup OK\n");
- return (0);
-
- cleanup_deregister:
- cfs_psdev_deregister(&libcfs_dev);
- cleanup_lwt:
-#if LWT_SUPPORT
- lwt_fini();
- cleanup_debug:
-#endif
- libcfs_debug_cleanup();
- return rc;
-}
-
-static void exit_libcfs_module(void)
-{
- int rc;
-
- remove_proc();
-
- CDEBUG(D_MALLOC, "before Portals cleanup: kmem %d\n",
- atomic_read(&libcfs_kmemory));
-
- rc = cfs_psdev_deregister(&libcfs_dev);
- if (rc)
- CERROR("misc_deregister error %d\n", rc);
-
-#if LWT_SUPPORT
- lwt_fini();
-#endif
-
- if (atomic_read(&libcfs_kmemory) != 0)
- CERROR("Portals memory leaked: %d bytes\n",
- atomic_read(&libcfs_kmemory));
-
- rc = libcfs_debug_cleanup();
- if (rc)
- printk(KERN_ERR "LustreError: libcfs_debug_cleanup: %d\n", rc);
- libcfs_arch_cleanup();
-}
-
-cfs_module(libcfs, "1.0.0", init_libcfs_module, exit_libcfs_module);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff