diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c new file mode 100644 index 000000000000..46aad6813cab --- /dev/null +++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c @@ -0,0 +1,445 @@ +/* + * 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/sysctl.h> +#include <linux/version.h> +#include <linux/proc_fs.h> +#include <linux/slab.h> +#include <linux/stat.h> +#include <linux/ctype.h> +#include <asm/bitops.h> +#include <asm/uaccess.h> +#include <linux/utsname.h> + +#define DEBUG_SUBSYSTEM S_CLASS + +#include <obd_support.h> +#include <lprocfs_status.h> + +#ifdef CONFIG_SYSCTL +ctl_table_header_t *obd_table_header = NULL; +#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, +}; + + +int LL_PROC_PROTO(proc_set_timeout) +{ + int rc; + + rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); + if (ldlm_timeout >= obd_timeout) + ldlm_timeout = max(obd_timeout / 3, 1U); + return rc; +} + +int LL_PROC_PROTO(proc_memory_alloc) +{ + char buf[22]; + int len; + DECLARE_LL_PROC_PPOS_DECL; + + if (!*lenp || (*ppos && !write)) { + *lenp = 0; + return 0; + } + 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)) + return -EFAULT; + *lenp = len; + *ppos += *lenp; + return 0; +} + +int LL_PROC_PROTO(proc_pages_alloc) +{ + char buf[22]; + int len; + DECLARE_LL_PROC_PPOS_DECL; + + if (!*lenp || (*ppos && !write)) { + *lenp = 0; + return 0; + } + if (write) + return -EINVAL; + + len = snprintf(buf, sizeof(buf), LPU64"\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; +} + +int LL_PROC_PROTO(proc_mem_max) +{ + char buf[22]; + int len; + DECLARE_LL_PROC_PPOS_DECL; + + if (!*lenp || (*ppos && !write)) { + *lenp = 0; + return 0; + } + if (write) + return -EINVAL; + + len = snprintf(buf, sizeof(buf), LPU64"\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; +} + +int LL_PROC_PROTO(proc_pages_max) +{ + char buf[22]; + int len; + DECLARE_LL_PROC_PPOS_DECL; + + if (!*lenp || (*ppos && !write)) { + *lenp = 0; + return 0; + } + if (write) + return -EINVAL; + + len = snprintf(buf, sizeof(buf), LPU64"\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; +} + +int LL_PROC_PROTO(proc_max_dirty_pages_in_mb) +{ + 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, + (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 > ((num_physpages / 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, + ((num_physpages / 10) * 9)); + obd_max_dirty_pages = ((num_physpages / 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; +} + +int LL_PROC_PROTO(proc_alloc_fail_rate) +{ + 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, + (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; +} + +int LL_PROC_PROTO(proc_at_min) +{ + return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); +} +int LL_PROC_PROTO(proc_at_max) +{ + return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); +} +int LL_PROC_PROTO(proc_at_extra) +{ + return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); +} +int LL_PROC_PROTO(proc_at_early_margin) +{ + return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); +} +int LL_PROC_PROTO(proc_at_history) +{ + return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); +} + +#ifdef CONFIG_SYSCTL +static ctl_table_t obd_table[] = { + { + INIT_CTL_NAME(OBD_TIMEOUT) + .procname = "timeout", + .data = &obd_timeout, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_set_timeout + }, + { + INIT_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 + }, + { + INIT_CTL_NAME(OBD_DUMP_ON_TIMEOUT) + .procname = "dump_on_timeout", + .data = &obd_dump_on_timeout, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dointvec + }, + { + INIT_CTL_NAME(OBD_DUMP_ON_EVICTION) + .procname = "dump_on_eviction", + .data = &obd_dump_on_eviction, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dointvec + }, + { + INIT_CTL_NAME(OBD_MEMUSED) + .procname = "memused", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = &proc_memory_alloc + }, + { + INIT_CTL_NAME(OBD_PAGESUSED) + .procname = "pagesused", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = &proc_pages_alloc + }, + { + INIT_CTL_NAME(OBD_MAXMEMUSED) + .procname = "memused_max", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = &proc_mem_max + }, + { + INIT_CTL_NAME(OBD_MAXPAGESUSED) + .procname = "pagesused_max", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = &proc_pages_max + }, + { + INIT_CTL_NAME(OBD_LDLM_TIMEOUT) + .procname = "ldlm_timeout", + .data = &ldlm_timeout, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_set_timeout + }, + { + INIT_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 + }, + { + INIT_CTL_NAME(OBD_MAX_DIRTY_PAGES) + .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(OBD_AT_MIN) + .procname = "at_min", + .data = &at_min, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_at_min + }, + { + INIT_CTL_NAME(OBD_AT_MAX) + .procname = "at_max", + .data = &at_max, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_at_max + }, + { + INIT_CTL_NAME(OBD_AT_EXTRA) + .procname = "at_extra", + .data = &at_extra, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_at_extra + }, + { + INIT_CTL_NAME(OBD_AT_EARLY_MARGIN) + .procname = "at_early_margin", + .data = &at_early_margin, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_at_early_margin + }, + { + INIT_CTL_NAME(OBD_AT_HISTORY) + .procname = "at_history", + .data = &at_history, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_at_history + }, + { INIT_CTL_NAME(0) } +}; + +static ctl_table_t parent_table[] = { + { + INIT_CTL_NAME(OBD_SYSCTL) + .procname = "lustre", + .data = NULL, + .maxlen = 0, + .mode = 0555, + .child = obd_table + }, + { INIT_CTL_NAME(0) } +}; +#endif + +void obd_sysctl_init (void) +{ +#ifdef CONFIG_SYSCTL + if ( !obd_table_header ) + obd_table_header = cfs_register_sysctl_table(parent_table, 0); +#endif +} + +void obd_sysctl_clean (void) +{ +#ifdef CONFIG_SYSCTL + if ( obd_table_header ) + unregister_sysctl_table(obd_table_header); + obd_table_header = NULL; +#endif +} |