Whamcloud - gitweb
LU-3963 libcfs: remove proc handler wrappers
[fs/lustre-release.git] / lustre / obdclass / linux / linux-sysctl.c
index 2cf39d4..dd94b46 100644 (file)
@@ -1,30 +1,40 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
  *
- *  Copyright (C) 2001, 2002 Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
- *   This file is part of the Lustre file system, http://www.lustre.org
- *   Lustre is a trademark of Cluster File Systems, Inc.
+ * 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.
  *
- *   You may have signed or agreed to another license before downloading
- *   this software.  If so, you are bound by the terms and conditions
- *   of that agreement, and the following does not apply to you.  See the
- *   LICENSE file included with this distribution for more information.
+ * 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).
  *
- *   If you did not agree to a different license, then this copy of Lustre
- *   is open source 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.
+ * 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
  *
- *   In either case, 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
- *   license text for more details.
+ * 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/autoconf.h>
 #include <linux/sysctl.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
 #include <obd_support.h>
 #include <lprocfs_status.h>
 
-cfs_sysctl_table_header_t *obd_table_header = NULL;
-
-#define OBD_SYSCTL 300
-
-enum {
-        OBD_FAIL_LOC = 1,       /* control test failures instrumentation */
-        OBD_FAIL_VAL,           /* userdata for fail loc */
-        OBD_TIMEOUT,            /* 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 */
-};
-
-int LL_PROC_PROTO(proc_fail_loc)
-{
-        int rc;
-        long old_fail_loc = obd_fail_loc;
-
-        rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
-        if (old_fail_loc != obd_fail_loc)
-                wake_up(&obd_race_waitq);
-        return rc;
-}
+#ifdef CONFIG_SYSCTL
+struct ctl_table_header *obd_table_header = NULL;
+#endif
 
-int LL_PROC_PROTO(proc_set_timeout)
+static int
+proc_set_timeout(struct ctl_table *table, int write, void __user *buffer,
+                size_t *lenp, loff_t *ppos)
 {
         int rc;
 
-        rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
+       rc = proc_dointvec(table, write, buffer, lenp, ppos);
         if (ldlm_timeout >= obd_timeout)
                 ldlm_timeout = max(obd_timeout / 3, 1U);
         return rc;
 }
 
-int LL_PROC_PROTO(proc_memory_alloc)
+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;
-        DECLARE_LL_PROC_PPOS_DECL;
 
         if (!*lenp || (*ppos && !write)) {
                 *lenp = 0;
                 return 0;
         }
-        if (write) 
+        if (write)
                 return -EINVAL;
-        
+
         len = snprintf(buf, sizeof(buf), LPU64"\n", obd_memory_sum());
         if (len > *lenp)
                 len = *lenp;
         buf[len] = '\0';
-        if (copy_to_user(buffer, buf, len))
+       if (copy_to_user(buffer, buf, len))
                 return -EFAULT;
         *lenp = len;
         *ppos += *lenp;
         return 0;
 }
 
-int LL_PROC_PROTO(proc_pages_alloc)
+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;
-        DECLARE_LL_PROC_PPOS_DECL;
 
         if (!*lenp || (*ppos && !write)) {
                 *lenp = 0;
@@ -125,18 +112,19 @@ int LL_PROC_PROTO(proc_pages_alloc)
         if (len > *lenp)
                 len = *lenp;
         buf[len] = '\0';
-        if (copy_to_user(buffer, buf, len))
+       if (copy_to_user(buffer, buf, len))
                 return -EFAULT;
         *lenp = len;
         *ppos += *lenp;
         return 0;
 }
 
-int LL_PROC_PROTO(proc_mem_max)
+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;
-        DECLARE_LL_PROC_PPOS_DECL;
 
         if (!*lenp || (*ppos && !write)) {
                 *lenp = 0;
@@ -149,18 +137,19 @@ int LL_PROC_PROTO(proc_mem_max)
         if (len > *lenp)
                 len = *lenp;
         buf[len] = '\0';
-        if (copy_to_user(buffer, buf, len))
+       if (copy_to_user(buffer, buf, len))
                 return -EFAULT;
         *lenp = len;
         *ppos += *lenp;
         return 0;
 }
 
-int LL_PROC_PROTO(proc_pages_max)
+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;
-        DECLARE_LL_PROC_PPOS_DECL;
 
         if (!*lenp || (*ppos && !write)) {
                 *lenp = 0;
@@ -173,25 +162,68 @@ int LL_PROC_PROTO(proc_pages_max)
         if (len > *lenp)
                 len = *lenp;
         buf[len] = '\0';
-        if (copy_to_user(buffer, buf, len))
+       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;
+}
+
 #ifdef RANDOM_FAIL_ALLOC
-int LL_PROC_PROTO(proc_alloc_fail_rate)
+int proc_alloc_fail_rate(struct ctl_table *table, int write,
+                        void __user *buffer, size_t *lenp, loff_t *ppos)
 {
         int rc          = 0;
-        DECLARE_LL_PROC_PPOS_DECL;
 
         if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
                 *lenp = 0;
                 return 0;
         }
         if (write) {
-                rc = lprocfs_write_frac_helper(buffer, *lenp, 
+                rc = lprocfs_write_frac_helper(buffer, *lenp,
                                                (unsigned int*)table->data,
                                                OBD_ALLOC_FAIL_MULT);
         } else {
@@ -204,7 +236,7 @@ int LL_PROC_PROTO(proc_alloc_fail_rate)
                 if (len > *lenp)
                         len = *lenp;
                 buf[len] = '\0';
-                if (copy_to_user(buffer, buf, len))
+               if (copy_to_user(buffer, buf, len))
                         return -EFAULT;
                 *lenp = len;
         }
@@ -213,133 +245,175 @@ int LL_PROC_PROTO(proc_alloc_fail_rate)
 }
 #endif
 
-static cfs_sysctl_table_t obd_table[] = {
-        {
-                .ctl_name = OBD_FAIL_LOC,
-                .procname = "fail_loc",
-                .data     = &obd_fail_loc,
-                .maxlen   = sizeof(int),
-                .mode     = 0644,
-                .proc_handler = &proc_fail_loc
-        },
-        {
-                .ctl_name = OBD_FAIL_VAL,
-                .procname = "fail_val",
-                .data     = &obd_fail_val,
-                .maxlen   = sizeof(int),
-                .mode     = 0644,
-                .proc_handler = &proc_dointvec
-        },
-        {
-                .ctl_name = OBD_TIMEOUT,
-                .procname = "timeout",
-                .data     = &obd_timeout,
-                .maxlen   = sizeof(int),
-                .mode     = 0644,
-                .proc_handler = &proc_set_timeout
-        },
-        {
-                .ctl_name = OBD_DEBUG_PEER_ON_TIMEOUT,
-                .procname = "debug_peer_on_timeout",
-                .data     = &obd_debug_peer_on_timeout,
-                .maxlen   = sizeof(int),
-                .mode     = 0644,
-                .proc_handler = &proc_dointvec
-        },
-        {
-                .ctl_name = OBD_DUMP_ON_TIMEOUT,
-                .procname = "dump_on_timeout",
-                .data     = &obd_dump_on_timeout,
-                .maxlen   = sizeof(int),
-                .mode     = 0644,
-                .proc_handler = &proc_dointvec
-        },
-        {
-                .ctl_name = OBD_DUMP_ON_EVICTION,
-                .procname = "dump_on_eviction",
-                .data     = &obd_dump_on_eviction,
-                .maxlen   = sizeof(int),
-                .mode     = 0644,
-                .proc_handler = &proc_dointvec
-        },
-        {
-                .ctl_name = OBD_MEMUSED,
-                .procname = "memused",
-                .data     = NULL,
-                .maxlen   = 0,
-                .mode     = 0444,
-                .proc_handler = &proc_memory_alloc
-        },
-        {
-                .ctl_name = OBD_PAGESUSED,
-                .procname = "pagesused",
-                .data     = NULL,
-                .maxlen   = 0,
-                .mode     = 0444,
-                .proc_handler = &proc_pages_alloc
-        },
-        {
-                .ctl_name = OBD_MAXMEMUSED,
-                .procname = "memused_max",
-                .data     = NULL,
-                .maxlen   = 0,
-                .mode     = 0444,
-                .proc_handler = &proc_mem_max
-        },
-        {
-                .ctl_name = OBD_MAXPAGESUSED,
-                .procname = "pagesused_max",
-                .data     = NULL,
-                .maxlen   = 0,
-                .mode     = 0444,
-                .proc_handler = &proc_pages_max
-        },
-        {
-                .ctl_name = OBD_LDLM_TIMEOUT,
-                .procname = "ldlm_timeout",
-                .data     = &ldlm_timeout,
-                .maxlen   = sizeof(int),
-                .mode     = 0644,
-                .proc_handler = &proc_set_timeout
-        },
-#ifdef RANDOM_FAIL_LOC
-        {
-                .ctl_name = OBD_ALLOC_FAIL_RATE,
-                .procname = "alloc_fail_rate",
-                .data     = &obd_alloc_fail_rate,
-                .maxlen   = sizeof(int),
-                .mode     = 0644,
-                .proc_handler = &proc_alloc_fail_rate
-        },
+#ifdef CONFIG_SYSCTL
+static struct ctl_table obd_table[] = {
+       {
+               INIT_CTL_NAME
+               .procname       = "timeout",
+               .data           = &obd_timeout,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_set_timeout
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "debug_peer_on_timeout",
+               .data           = &obd_debug_peer_on_timeout,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "dump_on_timeout",
+               .data           = &obd_dump_on_timeout,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "dump_on_eviction",
+               .data           = &obd_dump_on_eviction,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "memused",
+               .data           = NULL,
+               .maxlen         = 0,
+               .mode           = 0444,
+               .proc_handler   = &proc_memory_alloc
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "pagesused",
+               .data           = NULL,
+               .maxlen         = 0,
+               .mode           = 0444,
+               .proc_handler   = &proc_pages_alloc
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "memused_max",
+               .data           = NULL,
+               .maxlen         = 0,
+               .mode           = 0444,
+               .proc_handler   = &proc_mem_max
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "pagesused_max",
+               .data           = NULL,
+               .maxlen         = 0,
+               .mode           = 0444,
+               .proc_handler   = &proc_pages_max
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "ldlm_timeout",
+               .data           = &ldlm_timeout,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_set_timeout
+       },
+#ifdef RANDOM_FAIL_ALLOC
+       {
+               INIT_CTL_NAME
+               .procname       = "alloc_fail_rate",
+               .data           = &obd_alloc_fail_rate,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_alloc_fail_rate
+       },
 #endif
-        { 0 }
+       {
+               INIT_CTL_NAME
+               .procname       = "max_dirty_mb",
+               .data           = &obd_max_dirty_pages,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_max_dirty_pages_in_mb
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "bulk_timeout",
+               .data           = &bulk_timeout,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "at_min",
+               .data           = &at_min,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "at_max",
+               .data           = &at_max,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "at_extra",
+               .data           = &at_extra,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "at_early_margin",
+               .data           = &at_early_margin,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec
+       },
+       {
+               INIT_CTL_NAME
+               .procname       = "at_history",
+               .data           = &at_history,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec
+       },
+       { 0 }
 };
 
-static cfs_sysctl_table_t parent_table[] = {
-        {
-                .ctl_name = OBD_SYSCTL,
-                .procname = "lustre",
-                .data     = NULL,
-                .maxlen   = 0,
-                .mode     = 0555,
-                .child    = obd_table
-        },
-        {0}
+static struct ctl_table parent_table[] = {
+       {
+               INIT_CTL_NAME
+               .procname       = "lustre",
+               .data           = NULL,
+               .maxlen         = 0,
+               .mode           = 0555,
+               .child          = obd_table
+       },
+       { 0 }
 };
+#endif
 
 void obd_sysctl_init (void)
 {
 #ifdef CONFIG_SYSCTL
-        if ( !obd_table_header )
-                obd_table_header = cfs_register_sysctl_table(parent_table, 0);
+       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 )
-                cfs_unregister_sysctl_table(obd_table_header);
-        obd_table_header = NULL;
+       if ( obd_table_header )
+               unregister_sysctl_table(obd_table_header);
+       obd_table_header = NULL;
 #endif
 }