*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2014, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <net/sock.h>
+#include <linux/uio.h>
+#include <linux/uaccess.h>
+
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/list.h>
+
+#include <linux/sysctl.h>
+#include <linux/debugfs.h>
+#include <asm/div64.h>
#define DEBUG_SUBSYSTEM S_LNET
#include <libcfs/libcfs.h>
#include <libcfs/libcfs_crypto.h>
+#include <libcfs/linux/linux-misc.h>
#include <lnet/lib-lnet.h>
+#include "tracefile.h"
-static 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);
-}
-
-static 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 (signal_pending(current))
- 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 (signal_pending(current))
- 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 dentry *lnet_debugfs_root;
static DECLARE_RWSEM(ioctl_list_sem);
static LIST_HEAD(ioctl_list);
}
EXPORT_SYMBOL(libcfs_deregister_ioctl);
-static int libcfs_ioctl(struct cfs_psdev_file *pfile,
- unsigned long cmd, void __user *uparam)
+int libcfs_ioctl(unsigned long cmd, void __user *uparam)
{
struct libcfs_ioctl_data *data = NULL;
struct libcfs_ioctl_hdr *hdr;
case IOC_LIBCFS_CLEAR_DEBUG:
libcfs_debug_clear_buffer();
break;
- /*
- * case IOC_LIBCFS_PANIC:
- * Handled in arch/cfs_module.c
- */
case IOC_LIBCFS_MARK_DEBUG:
if (data == NULL ||
data->ioc_inlbuf1 == NULL ||
libcfs_debug_mark_buffer(data->ioc_inlbuf1);
break;
- case IOC_LIBCFS_MEMHOG:
- if (data == NULL)
- GOTO(out, err = -EINVAL);
-
- if (pfile->private_data == NULL)
- GOTO(out, err = -EINVAL);
-
- kportal_memhog_free(pfile->private_data);
- err = kportal_memhog_alloc(pfile->private_data,
- data->ioc_count, data->ioc_flags);
- if (err != 0)
- kportal_memhog_free(pfile->private_data);
- break;
-
default: {
struct libcfs_ioctl_handler *hand;
if (err == -EINVAL)
continue;
- if (err == 0) {
- if (copy_to_user(uparam, hdr, hdr->ioc_len))
- err = -EFAULT;
- }
+ if (copy_to_user(uparam, hdr, hdr->ioc_len))
+ err = -EFAULT;
break;
}
up_read(&ioctl_list_sem);
RETURN(err);
}
-struct cfs_psdev_ops libcfs_psdev_ops = {
- libcfs_psdev_open,
- libcfs_psdev_release,
- NULL,
- NULL,
- libcfs_ioctl
+int lprocfs_call_handler(void *data, int write, loff_t *ppos,
+ void __user *buffer, size_t *lenp,
+ int (*handler)(void *data, int write, loff_t pos,
+ void __user *buffer, int len))
+{
+ int rc = handler(data, write, *ppos, buffer, *lenp);
+
+ if (rc < 0)
+ return rc;
+
+ if (write) {
+ *ppos += *lenp;
+ } else {
+ *lenp = rc;
+ *ppos += rc;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(lprocfs_call_handler);
+
+static int __proc_dobitmasks(void *data, int write,
+ loff_t pos, void __user *buffer, int nob)
+{
+ const int tmpstrlen = 512;
+ char *tmpstr;
+ int rc;
+ unsigned int *mask = data;
+ int is_subsys = (mask == &libcfs_subsystem_debug) ? 1 : 0;
+ int is_printk = (mask == &libcfs_printk) ? 1 : 0;
+
+ rc = cfs_trace_allocate_string_buffer(&tmpstr, tmpstrlen);
+ if (rc < 0)
+ return rc;
+
+ if (!write) {
+ libcfs_debug_mask2str(tmpstr, tmpstrlen, *mask, is_subsys);
+ rc = strlen(tmpstr);
+
+ if (pos >= rc) {
+ rc = 0;
+ } else {
+ rc = cfs_trace_copyout_string(buffer, nob,
+ tmpstr + pos, "\n");
+ }
+ } else {
+ rc = cfs_trace_copyin_string(tmpstr, tmpstrlen, buffer, nob);
+ if (rc < 0) {
+ kfree(tmpstr);
+ return rc;
+ }
+
+ rc = libcfs_debug_str2mask(mask, tmpstr, is_subsys);
+ /* Always print LBUG/LASSERT to console, so keep this mask */
+ if (is_printk)
+ *mask |= D_EMERG;
+ }
+
+ kfree(tmpstr);
+ return rc;
+}
+
+static int proc_dobitmasks(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
+ __proc_dobitmasks);
+}
+
+static int min_watchdog_ratelimit; /* disable ratelimiting */
+static int max_watchdog_ratelimit = (24*60*60); /* limit to once per day */
+
+static int __proc_dump_kernel(void *data, int write,
+ loff_t pos, void __user *buffer, int nob)
+{
+ if (!write)
+ return 0;
+
+ return cfs_trace_dump_debug_buffer_usrstr(buffer, nob);
+}
+
+static int proc_dump_kernel(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
+ __proc_dump_kernel);
+}
+
+static int __proc_daemon_file(void *data, int write,
+ loff_t pos, void __user *buffer, int nob)
+{
+ if (!write) {
+ int len = strlen(cfs_tracefile);
+
+ if (pos >= len)
+ return 0;
+
+ return cfs_trace_copyout_string(buffer, nob,
+ cfs_tracefile + pos, "\n");
+ }
+
+ return cfs_trace_daemon_command_usrstr(buffer, nob);
+}
+
+static int proc_daemon_file(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
+ __proc_daemon_file);
+}
+
+static int libcfs_force_lbug(struct ctl_table *table, int write,
+ void __user *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ if (write)
+ LBUG();
+ return 0;
+}
+
+static int proc_fail_loc(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int rc;
+ long old_fail_loc = cfs_fail_loc;
+
+ rc = proc_doulongvec_minmax(table, write, buffer, lenp, ppos);
+ if (old_fail_loc != cfs_fail_loc)
+ wake_up(&cfs_race_waitq);
+ return rc;
+}
+
+static int __proc_cpt_table(void *data, int write,
+ loff_t pos, void __user *buffer, int nob)
+{
+ char *buf = NULL;
+ int len = 4096;
+ int rc = 0;
+
+ if (write)
+ return -EPERM;
+
+ LASSERT(cfs_cpt_table != NULL);
+
+ while (1) {
+ LIBCFS_ALLOC(buf, len);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ rc = cfs_cpt_table_print(cfs_cpt_table, buf, len);
+ if (rc >= 0)
+ break;
+
+ if (rc == -EFBIG) {
+ LIBCFS_FREE(buf, len);
+ len <<= 1;
+ continue;
+ }
+ goto out;
+ }
+
+ if (pos >= rc) {
+ rc = 0;
+ goto out;
+ }
+
+ rc = cfs_trace_copyout_string(buffer, nob, buf + pos, NULL);
+out:
+ if (buf != NULL)
+ LIBCFS_FREE(buf, len);
+ return rc;
+}
+
+static int proc_cpt_table(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
+ __proc_cpt_table);
+}
+
+static int __proc_cpt_distance(void *data, int write,
+ loff_t pos, void __user *buffer, int nob)
+{
+ char *buf = NULL;
+ int len = 4096;
+ int rc = 0;
+
+ if (write)
+ return -EPERM;
+
+ LASSERT(cfs_cpt_table != NULL);
+
+ while (1) {
+ LIBCFS_ALLOC(buf, len);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ rc = cfs_cpt_distance_print(cfs_cpt_table, buf, len);
+ if (rc >= 0)
+ break;
+
+ if (rc == -EFBIG) {
+ LIBCFS_FREE(buf, len);
+ len <<= 1;
+ continue;
+ }
+ goto out;
+ }
+
+ if (pos >= rc) {
+ rc = 0;
+ goto out;
+ }
+
+ rc = cfs_trace_copyout_string(buffer, nob, buf + pos, NULL);
+ out:
+ if (buf != NULL)
+ LIBCFS_FREE(buf, len);
+ return rc;
+}
+
+static int proc_cpt_distance(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return lprocfs_call_handler(table->data, write, ppos, buffer, lenp,
+ __proc_cpt_distance);
+}
+
+static struct ctl_table lnet_table[] = {
+ {
+ INIT_CTL_NAME
+ .procname = "debug",
+ .data = &libcfs_debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dobitmasks,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "subsystem_debug",
+ .data = &libcfs_subsystem_debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dobitmasks,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "printk",
+ .data = &libcfs_printk,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dobitmasks,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "cpu_partition_table",
+ .maxlen = 128,
+ .mode = 0444,
+ .proc_handler = &proc_cpt_table,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "cpu_partition_distance",
+ .maxlen = 128,
+ .mode = 0444,
+ .proc_handler = &proc_cpt_distance,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "debug_log_upcall",
+ .data = lnet_debug_log_upcall,
+ .maxlen = sizeof(lnet_debug_log_upcall),
+ .mode = 0644,
+ .proc_handler = &proc_dostring,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "lnet_memused",
+ .data = (int *)&libcfs_kmemory.counter,
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "catastrophe",
+ .data = &libcfs_catastrophe,
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "dump_kernel",
+ .maxlen = 256,
+ .mode = 0200,
+ .proc_handler = &proc_dump_kernel,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "daemon_file",
+ .mode = 0644,
+ .maxlen = 256,
+ .proc_handler = &proc_daemon_file,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "watchdog_ratelimit",
+ .data = &libcfs_watchdog_ratelimit,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .extra1 = &min_watchdog_ratelimit,
+ .extra2 = &max_watchdog_ratelimit,
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "force_lbug",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0200,
+ .proc_handler = &libcfs_force_lbug
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "fail_loc",
+ .data = &cfs_fail_loc,
+ .maxlen = sizeof(cfs_fail_loc),
+ .mode = 0644,
+ .proc_handler = &proc_fail_loc
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "fail_val",
+ .data = &cfs_fail_val,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME
+ .procname = "fail_err",
+ .data = &cfs_fail_err,
+ .maxlen = sizeof(cfs_fail_err),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ }
+};
+
+static const struct lnet_debugfs_symlink_def lnet_debugfs_symlinks[] = {
+ { .name = "console_ratelimit",
+ .target = "../../../module/libcfs/parameters/libcfs_console_ratelimit" },
+ { .name = "debug_path",
+ .target = "../../../module/libcfs/parameters/libcfs_debug_file_path" },
+ { .name = "panic_on_lbug",
+ .target = "../../../module/libcfs/parameters/libcfs_panic_on_lbug" },
+ { .name = "console_backoff",
+ .target = "../../../module/libcfs/parameters/libcfs_console_backoff" },
+ { .name = "debug_mb",
+ .target = "../../../module/libcfs/parameters/libcfs_debug_mb" },
+ { .name = "console_min_delay_centisecs",
+ .target = "../../../module/libcfs/parameters/libcfs_console_min_delay" },
+ { .name = "console_max_delay_centisecs",
+ .target = "../../../module/libcfs/parameters/libcfs_console_max_delay" },
+ { .name = NULL },
};
-static int init_libcfs_module(void)
+static ssize_t lnet_debugfs_read(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct ctl_table *table = filp->private_data;
+ ssize_t rc;
+
+ rc = table->proc_handler(table, 0, buf, &count, ppos);
+ if (!rc)
+ rc = count;
+
+ return rc;
+}
+
+static ssize_t lnet_debugfs_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct ctl_table *table = filp->private_data;
+ ssize_t rc;
+
+ rc = table->proc_handler(table, 1, (void __user *)buf, &count, ppos);
+ if (!rc)
+ rc = count;
+
+ return rc;
+}
+
+static const struct file_operations lnet_debugfs_file_operations_rw = {
+ .open = simple_open,
+ .read = lnet_debugfs_read,
+ .write = lnet_debugfs_write,
+ .llseek = default_llseek,
+};
+
+static const struct file_operations lnet_debugfs_file_operations_ro = {
+ .open = simple_open,
+ .read = lnet_debugfs_read,
+ .llseek = default_llseek,
+};
+
+static const struct file_operations lnet_debugfs_file_operations_wo = {
+ .open = simple_open,
+ .write = lnet_debugfs_write,
+ .llseek = default_llseek,
+};
+
+static const struct file_operations *lnet_debugfs_fops_select(umode_t mode)
+{
+ if (!(mode & S_IWUGO))
+ return &lnet_debugfs_file_operations_ro;
+
+ if (!(mode & S_IRUGO))
+ return &lnet_debugfs_file_operations_wo;
+
+ return &lnet_debugfs_file_operations_rw;
+}
+
+void lnet_insert_debugfs(struct ctl_table *table,
+ const struct lnet_debugfs_symlink_def *symlinks)
+{
+ if (!lnet_debugfs_root)
+ lnet_debugfs_root = debugfs_create_dir("lnet", NULL);
+
+ /* Even if we cannot create, just ignore it altogether) */
+ if (IS_ERR_OR_NULL(lnet_debugfs_root))
+ return;
+
+ /* We don't save the dentry returned in next two calls, because
+ * we don't call debugfs_remove() but rather remove_recursive()
+ */
+ for (; table && table->procname; table++)
+ debugfs_create_file(table->procname, table->mode,
+ lnet_debugfs_root, table,
+ lnet_debugfs_fops_select(table->mode));
+
+ for (; symlinks && symlinks->name; symlinks++)
+ debugfs_create_symlink(symlinks->name, lnet_debugfs_root,
+ symlinks->target);
+}
+EXPORT_SYMBOL_GPL(lnet_insert_debugfs);
+
+static void lnet_remove_debugfs(void)
+{
+ debugfs_remove_recursive(lnet_debugfs_root);
+
+ lnet_debugfs_root = NULL;
+}
+
+static int __init libcfs_init(void)
{
int rc;
goto cleanup_wi;
}
-
- rc = insert_proc();
- if (rc) {
- CERROR("insert_proc: error %d\n", rc);
- goto cleanup_crypto;
- }
+ lnet_insert_debugfs(lnet_table, lnet_debugfs_symlinks);
CDEBUG (D_OTHER, "portals setup OK\n");
return 0;
-cleanup_crypto:
- cfs_crypto_unregister();
cleanup_wi:
cfs_wi_shutdown();
cleanup_deregister:
return rc;
}
-static void exit_libcfs_module(void)
+static void __exit libcfs_exit(void)
{
int rc;
- remove_proc();
+ lnet_remove_debugfs();
CDEBUG(D_MALLOC, "before Portals cleanup: kmem %d\n",
atomic_read(&libcfs_kmemory));
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();
rc);
}
-MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
-MODULE_DESCRIPTION("Libcfs v3.1");
-MODULE_VERSION("1.0.0");
+MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
+MODULE_DESCRIPTION("Lustre helper library");
+MODULE_VERSION(LIBCFS_VERSION);
MODULE_LICENSE("GPL");
-module_init(init_libcfs_module);
-module_exit(exit_libcfs_module);
+module_init(libcfs_init);
+module_exit(libcfs_exit);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff