--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * 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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/sysctl.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/proc_fs.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <linux/bitops.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+
+#define DEBUG_SUBSYSTEM S_CLASS
+
+#include "../../include/obd_support.h"
+#include "../../include/lprocfs_status.h"
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table_header *obd_table_header;
+#endif
+
+
+#define OBD_SYSCTL 300
+
+enum {
+ OBD_TIMEOUT = 3, /* RPC timeout before recovery/intr */
+ OBD_DUMP_ON_TIMEOUT, /* dump kernel debug log upon eviction */
+ OBD_MEMUSED, /* bytes currently OBD_ALLOCated */
+ OBD_PAGESUSED, /* pages currently OBD_PAGE_ALLOCated */
+ OBD_MAXMEMUSED, /* maximum bytes OBD_ALLOCated concurrently */
+ OBD_MAXPAGESUSED, /* maximum pages OBD_PAGE_ALLOCated concurrently */
+ OBD_SYNCFILTER, /* XXX temporary, as we play with sync osts.. */
+ OBD_LDLM_TIMEOUT, /* LDLM timeout for ASTs before client eviction */
+ OBD_DUMP_ON_EVICTION, /* dump kernel debug log upon eviction */
+ OBD_DEBUG_PEER_ON_TIMEOUT, /* dump peer debug when RPC times out */
+ OBD_ALLOC_FAIL_RATE, /* memory allocation random failure rate */
+ OBD_MAX_DIRTY_PAGES, /* maximum dirty pages */
+ OBD_AT_MIN, /* Adaptive timeouts params */
+ OBD_AT_MAX,
+ OBD_AT_EXTRA,
+ OBD_AT_EARLY_MARGIN,
+ OBD_AT_HISTORY,
+};
+
+
+#ifdef CONFIG_SYSCTL
+static int proc_set_timeout(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int rc;
+
+ rc = proc_dointvec(table, write, buffer, lenp, ppos);
+ if (ldlm_timeout >= obd_timeout)
+ ldlm_timeout = max(obd_timeout / 3, 1U);
+ return rc;
+}
+
+static int proc_memory_alloc(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ char buf[22];
+ int len;
+
+ if (!*lenp || (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+ if (write)
+ return -EINVAL;
+
+ len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_sum());
+ if (len > *lenp)
+ len = *lenp;
+ buf[len] = '\0';
+ if (copy_to_user(buffer, buf, len))
+ return -EFAULT;
+ *lenp = len;
+ *ppos += *lenp;
+ return 0;
+}
+
+static int proc_pages_alloc(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ char buf[22];
+ int len;
+
+ if (!*lenp || (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+ if (write)
+ return -EINVAL;
+
+ len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_sum());
+ if (len > *lenp)
+ len = *lenp;
+ buf[len] = '\0';
+ if (copy_to_user(buffer, buf, len))
+ return -EFAULT;
+ *lenp = len;
+ *ppos += *lenp;
+ return 0;
+}
+
+static int proc_mem_max(struct ctl_table *table, int write, void __user *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ char buf[22];
+ int len;
+
+ if (!*lenp || (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+ if (write)
+ return -EINVAL;
+
+ len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_max());
+ if (len > *lenp)
+ len = *lenp;
+ buf[len] = '\0';
+ if (copy_to_user(buffer, buf, len))
+ return -EFAULT;
+ *lenp = len;
+ *ppos += *lenp;
+ return 0;
+}
+
+static int proc_pages_max(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ char buf[22];
+ int len;
+
+ if (!*lenp || (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+ if (write)
+ return -EINVAL;
+
+ len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_max());
+ if (len > *lenp)
+ len = *lenp;
+ buf[len] = '\0';
+ if (copy_to_user(buffer, buf, len))
+ return -EFAULT;
+ *lenp = len;
+ *ppos += *lenp;
+ return 0;
+}
+
+static int proc_max_dirty_pages_in_mb(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int rc = 0;
+
+ if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+ if (write) {
+ rc = lprocfs_write_frac_helper(buffer, *lenp,
+ (unsigned int *)table->data,
+ 1 << (20 - PAGE_CACHE_SHIFT));
+ /* Don't allow them to let dirty pages exceed 90% of system
+ * memory and set a hard minimum of 4MB. */
+ if (obd_max_dirty_pages > ((totalram_pages / 10) * 9)) {
+ CERROR("Refusing to set max dirty pages to %u, which is more than 90%% of available RAM; setting to %lu\n",
+ obd_max_dirty_pages,
+ ((totalram_pages / 10) * 9));
+ obd_max_dirty_pages = (totalram_pages / 10) * 9;
+ } else if (obd_max_dirty_pages < 4 << (20 - PAGE_CACHE_SHIFT)) {
+ obd_max_dirty_pages = 4 << (20 - PAGE_CACHE_SHIFT);
+ }
+ } else {
+ char buf[21];
+ int len;
+
+ len = lprocfs_read_frac_helper(buf, sizeof(buf),
+ *(unsigned int *)table->data,
+ 1 << (20 - PAGE_CACHE_SHIFT));
+ if (len > *lenp)
+ len = *lenp;
+ buf[len] = '\0';
+ if (copy_to_user(buffer, buf, len))
+ return -EFAULT;
+ *lenp = len;
+ }
+ *ppos += *lenp;
+ return rc;
+}
+
+static int proc_alloc_fail_rate(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int rc = 0;
+
+ if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+ if (write) {
+ rc = lprocfs_write_frac_helper(buffer, *lenp,
+ (unsigned int *)table->data,
+ OBD_ALLOC_FAIL_MULT);
+ } else {
+ char buf[21];
+ int len;
+
+ len = lprocfs_read_frac_helper(buf, 21,
+ *(unsigned int *)table->data,
+ OBD_ALLOC_FAIL_MULT);
+ if (len > *lenp)
+ len = *lenp;
+ buf[len] = '\0';
+ if (copy_to_user(buffer, buf, len))
+ return -EFAULT;
+ *lenp = len;
+ }
+ *ppos += *lenp;
+ return rc;
+}
+
+static struct ctl_table obd_table[] = {
+ {
+ .procname = "timeout",
+ .data = &obd_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_set_timeout
+ },
+ {
+ .procname = "debug_peer_on_timeout",
+ .data = &obd_debug_peer_on_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .procname = "dump_on_timeout",
+ .data = &obd_dump_on_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .procname = "dump_on_eviction",
+ .data = &obd_dump_on_eviction,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .procname = "memused",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0444,
+ .proc_handler = &proc_memory_alloc
+ },
+ {
+ .procname = "pagesused",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0444,
+ .proc_handler = &proc_pages_alloc
+ },
+ {
+ .procname = "memused_max",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0444,
+ .proc_handler = &proc_mem_max
+ },
+ {
+ .procname = "pagesused_max",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0444,
+ .proc_handler = &proc_pages_max
+ },
+ {
+ .procname = "ldlm_timeout",
+ .data = &ldlm_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_set_timeout
+ },
+ {
+ .procname = "alloc_fail_rate",
+ .data = &obd_alloc_fail_rate,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_alloc_fail_rate
+ },
+ {
+ .procname = "max_dirty_mb",
+ .data = &obd_max_dirty_pages,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_max_dirty_pages_in_mb
+ },
+ {
+ .procname = "at_min",
+ .data = &at_min,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .procname = "at_max",
+ .data = &at_max,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .procname = "at_extra",
+ .data = &at_extra,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .procname = "at_early_margin",
+ .data = &at_early_margin,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .procname = "at_history",
+ .data = &at_history,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {}
+};
+
+static struct ctl_table parent_table[] = {
+ {
+ .procname = "lustre",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0555,
+ .child = obd_table
+ },
+ {}
+};
+#endif
+
+void obd_sysctl_init(void)
+{
+#ifdef CONFIG_SYSCTL
+ if (!obd_table_header)
+ obd_table_header = register_sysctl_table(parent_table);
+#endif
+}
+
+void obd_sysctl_clean(void)
+{
+#ifdef CONFIG_SYSCTL
+ if (obd_table_header)
+ unregister_sysctl_table(obd_table_header);
+ obd_table_header = NULL;
+#endif
+}
Code Review / kvmfornfv.git / blobdiff