* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, Intel Corporation.
+ * Copyright (c) 2012, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
#define DEBUG_SUBSYSTEM S_LNET
-#define LNET_MAX_IOCTL_BUF_LEN (sizeof(struct lnet_ioctl_net_config) + \
- sizeof(struct lnet_ioctl_config_data))
#include <libcfs/libcfs.h>
#include <libcfs/libcfs_crypto.h>
#include <lnet/lib-lnet.h>
-#include <lnet/lib-dlc.h>
-#include <lnet/lnet.h>
-#include <lnet/nidstr.h>
-#include "tracefile.h"
-void
-kportal_memhog_free (struct libcfs_device_userstate *ldu)
-{
- struct page **level0p = &ldu->ldu_memhog_root_page;
- struct page **level1p;
- struct page **level2p;
- int count1;
- int count2;
-
- if (*level0p != NULL) {
- level1p = (struct page **)page_address(*level0p);
- count1 = 0;
-
- while (count1 < PAGE_CACHE_SIZE/sizeof(struct page *) &&
- *level1p != NULL) {
-
- level2p = (struct page **)page_address(*level1p);
- count2 = 0;
-
- while (count2 < PAGE_CACHE_SIZE/sizeof(struct page *) &&
- *level2p != NULL) {
-
- __free_page(*level2p);
- ldu->ldu_memhog_pages--;
- level2p++;
- count2++;
- }
-
- __free_page(*level1p);
- ldu->ldu_memhog_pages--;
- level1p++;
- count1++;
- }
-
- __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,
- gfp_t flags)
-{
- struct page **level0p;
- struct page **level1p;
- struct page **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 = alloc_page(flags);
- if (*level0p == NULL)
- return -ENOMEM;
- ldu->ldu_memhog_pages++;
-
- level1p = (struct page **)page_address(*level0p);
- count1 = 0;
- memset(level1p, 0, PAGE_CACHE_SIZE);
-
- while (ldu->ldu_memhog_pages < npages &&
- count1 < PAGE_CACHE_SIZE/sizeof(struct page *)) {
-
- if (cfs_signal_pending())
- return -EINTR;
-
- *level1p = alloc_page(flags);
- if (*level1p == NULL)
- return -ENOMEM;
- ldu->ldu_memhog_pages++;
-
- level2p = (struct page **)page_address(*level1p);
- count2 = 0;
- memset(level2p, 0, PAGE_CACHE_SIZE);
-
- while (ldu->ldu_memhog_pages < npages &&
- count2 < PAGE_CACHE_SIZE/sizeof(struct page *)) {
-
- if (cfs_signal_pending())
- return -EINTR;
-
- *level2p = 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;
-
- try_module_get(THIS_MODULE);
-
- 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));
- }
-
- module_put(THIS_MODULE);
- RETURN(0);
-}
-
-static struct rw_semaphore ioctl_list_sem;
-static struct list_head ioctl_list;
+static DECLARE_RWSEM(ioctl_list_sem);
+static LIST_HEAD(ioctl_list);
int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand)
{
}
EXPORT_SYMBOL(libcfs_deregister_ioctl);
-static int libcfs_ioctl_handle(struct cfs_psdev_file *pfile, unsigned long cmd,
- void __user *arg, struct libcfs_ioctl_hdr *hdr)
+int libcfs_ioctl(unsigned long cmd, void __user *uparam)
{
struct libcfs_ioctl_data *data = NULL;
- int err;
+ struct libcfs_ioctl_hdr *hdr;
+ int err;
ENTRY;
- /* The libcfs_ioctl_data_adjust() function performs adjustment
- * operations on the libcfs_ioctl_data structure to make
- * it usable by the code. This doesn't need to be called
- * for new data structures added. */
+ /* 'cmd' and permissions get checked in our arch-specific caller */
+ err = libcfs_ioctl_getdata(&hdr, uparam);
+ if (err != 0) {
+ CDEBUG_LIMIT(D_ERROR,
+ "libcfs ioctl: data header error %d\n", err);
+ RETURN(err);
+ }
+
if (hdr->ioc_version == LIBCFS_IOCTL_VERSION) {
+ /* The libcfs_ioctl_data_adjust() function performs adjustment
+ * operations on the libcfs_ioctl_data structure to make
+ * it usable by the code. This doesn't need to be called
+ * for new data structures added. */
data = container_of(hdr, struct libcfs_ioctl_data, ioc_hdr);
err = libcfs_ioctl_data_adjust(data);
- if (err != 0) {
- RETURN(err);
- }
+ if (err != 0)
+ GOTO(out, err);
}
+ CDEBUG(D_IOCTL, "libcfs ioctl cmd %lu\n", cmd);
switch (cmd) {
case IOC_LIBCFS_CLEAR_DEBUG:
libcfs_debug_clear_buffer();
- RETURN(0);
- /*
- * case IOC_LIBCFS_PANIC:
- * Handled in arch/cfs_module.c
- */
+ break;
case IOC_LIBCFS_MARK_DEBUG:
- if (data->ioc_inlbuf1 == NULL ||
+ if (data == NULL ||
+ data->ioc_inlbuf1 == NULL ||
data->ioc_inlbuf1[data->ioc_inllen1 - 1] != '\0')
- RETURN(-EINVAL);
+ GOTO(out, err = -EINVAL);
+
libcfs_debug_mark_buffer(data->ioc_inlbuf1);
- RETURN(0);
- 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 = symbol_get(kping_client);
- if (!ping) {
- CERROR("symbol_get failed\n");
- } else {
- ping(data);
- symbol_put(kping_client);
- }
- RETURN(0);
- }
-
default: {
struct libcfs_ioctl_handler *hand;
down_read(&ioctl_list_sem);
list_for_each_entry(hand, &ioctl_list, item) {
err = hand->handle_ioctl(cmd, hdr);
- if (err != -EINVAL) {
- if (err == 0)
- err = libcfs_ioctl_popdata(arg,
- hdr, hdr->ioc_len);
- break;
+ if (err == -EINVAL)
+ continue;
+
+ if (err == 0) {
+ if (copy_to_user(uparam, hdr, hdr->ioc_len))
+ err = -EFAULT;
}
+ break;
}
up_read(&ioctl_list_sem);
- break;
- }
+ break; }
}
-
- RETURN(err);
-}
-
-static int libcfs_ioctl(struct cfs_psdev_file *pfile,
- unsigned long cmd, void __user *arg)
-{
- struct libcfs_ioctl_hdr *hdr;
- int err = 0;
- __u32 buf_len;
- ENTRY;
-
- err = libcfs_ioctl_getdata_len(arg, &buf_len);
- if (err != 0)
- RETURN(err);
-
- /*
- * do a check here to restrict the size of the memory
- * to allocate to guard against DoS attacks.
- */
- if (buf_len > LNET_MAX_IOCTL_BUF_LEN) {
- CERROR("LNET: user buffer exceeds kernel buffer\n");
- RETURN(-EINVAL);
- }
-
- LIBCFS_ALLOC_GFP(hdr, buf_len, GFP_IOFS);
- if (hdr == NULL)
- RETURN(-ENOMEM);
-
- /* 'cmd' and permissions get checked in our arch-specific caller */
- if (libcfs_ioctl_getdata(hdr, buf_len, arg)) {
- CERROR("LNET ioctl: data error\n");
- GOTO(out, err = -EINVAL);
- }
-
- err = libcfs_ioctl_handle(pfile, cmd, arg, hdr);
-
out:
- LIBCFS_FREE(hdr, buf_len);
+ LIBCFS_FREE(hdr, hdr->ioc_len);
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 struct miscdevice libcfs_dev;
-extern struct rw_semaphore cfs_tracefile_sem;
-extern struct mutex cfs_trace_thread_mutex;
-extern struct cfs_wi_sched *cfs_sched_rehash;
-
-extern void libcfs_init_nidstrings(void);
-extern int libcfs_arch_init(void);
-extern void libcfs_arch_cleanup(void);
-
-static int init_libcfs_module(void)
+static int __init libcfs_init(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);
- 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;
}
-static void exit_libcfs_module(void)
+static void __exit libcfs_exit(void)
{
int rc;
cfs_crypto_unregister();
cfs_wi_shutdown();
- rc = misc_deregister(&libcfs_dev);
- if (rc)
- CERROR("misc_deregister error %d\n", rc);
+ misc_deregister(&libcfs_dev);
cfs_cpu_fini();
if (rc)
printk(KERN_ERR "LustreError: libcfs_debug_cleanup: %d\n",
rc);
-
- fini_rwsem(&ioctl_list_sem);
- fini_rwsem(&cfs_tracefile_sem);
-
- libcfs_arch_cleanup();
}
-cfs_module(libcfs, "1.0.0", init_libcfs_module, exit_libcfs_module);
+MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
+MODULE_DESCRIPTION("Lustre helper library");
+MODULE_VERSION(LIBCFS_VERSION);
+MODULE_LICENSE("GPL");
+
+module_init(libcfs_init);
+module_exit(libcfs_exit);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff