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path: root/drivers/staging/lustre/lustre/libcfs/linux/linux-proc.c
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Diffstat (limited to 'drivers/staging/lustre/lustre/libcfs/linux/linux-proc.c')
-rw-r--r--drivers/staging/lustre/lustre/libcfs/linux/linux-proc.c580
1 files changed, 580 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/libcfs/linux/linux-proc.c b/drivers/staging/lustre/lustre/libcfs/linux/linux-proc.c
new file mode 100644
index 000000000000..522b28e99e41
--- /dev/null
+++ b/drivers/staging/lustre/lustre/libcfs/linux/linux-proc.c
@@ -0,0 +1,580 @@
+/*
+ * 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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * libcfs/libcfs/linux/linux-proc.c
+ *
+ * Author: Zach Brown <zab@zabbo.net>
+ * Author: Peter J. Braam <braam@clusterfs.com>
+ * Author: Phil Schwan <phil@clusterfs.com>
+ */
+
+#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 <asm/uaccess.h>
+
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/stat.h>
+#include <linux/list.h>
+#include <asm/uaccess.h>
+
+#include <linux/proc_fs.h>
+#include <linux/sysctl.h>
+
+# define DEBUG_SUBSYSTEM S_LNET
+
+#include <linux/libcfs/libcfs.h>
+#include <asm/div64.h>
+#include "tracefile.h"
+
+#ifdef CONFIG_SYSCTL
+static ctl_table_header_t *lnet_table_header = NULL;
+#endif
+extern char lnet_upcall[1024];
+/**
+ * The path of debug log dump upcall script.
+ */
+extern char lnet_debug_log_upcall[1024];
+
+#define CTL_LNET (0x100)
+enum {
+ PSDEV_DEBUG = 1, /* control debugging */
+ PSDEV_SUBSYSTEM_DEBUG, /* control debugging */
+ PSDEV_PRINTK, /* force all messages to console */
+ PSDEV_CONSOLE_RATELIMIT, /* ratelimit console messages */
+ PSDEV_CONSOLE_MAX_DELAY_CS, /* maximum delay over which we skip messages */
+ PSDEV_CONSOLE_MIN_DELAY_CS, /* initial delay over which we skip messages */
+ PSDEV_CONSOLE_BACKOFF, /* delay increase factor */
+ PSDEV_DEBUG_PATH, /* crashdump log location */
+ PSDEV_DEBUG_DUMP_PATH, /* crashdump tracelog location */
+ PSDEV_CPT_TABLE, /* information about cpu partitions */
+ PSDEV_LNET_UPCALL, /* User mode upcall script */
+ PSDEV_LNET_MEMUSED, /* bytes currently PORTAL_ALLOCated */
+ PSDEV_LNET_CATASTROPHE, /* if we have LBUGged or panic'd */
+ PSDEV_LNET_PANIC_ON_LBUG, /* flag to panic on LBUG */
+ PSDEV_LNET_DUMP_KERNEL, /* snapshot kernel debug buffer to file */
+ PSDEV_LNET_DAEMON_FILE, /* spool kernel debug buffer to file */
+ PSDEV_LNET_DEBUG_MB, /* size of debug buffer */
+ PSDEV_LNET_DEBUG_LOG_UPCALL, /* debug log upcall script */
+ PSDEV_LNET_WATCHDOG_RATELIMIT, /* ratelimit watchdog messages */
+ PSDEV_LNET_FORCE_LBUG, /* hook to force an LBUG */
+ PSDEV_LNET_FAIL_LOC, /* control test failures instrumentation */
+ PSDEV_LNET_FAIL_VAL, /* userdata for fail loc */
+};
+
+int
+proc_call_handler(void *data, int write,
+ loff_t *ppos, void *buffer, size_t *lenp,
+ int (*handler)(void *data, int write,
+ loff_t pos, void *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(proc_call_handler);
+
+static int __proc_dobitmasks(void *data, int write,
+ loff_t pos, void *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) {
+ cfs_trace_free_string_buffer(tmpstr, tmpstrlen);
+ 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;
+ }
+
+ cfs_trace_free_string_buffer(tmpstr, tmpstrlen);
+ return rc;
+}
+
+DECLARE_PROC_HANDLER(proc_dobitmasks)
+
+static int min_watchdog_ratelimit = 0; /* 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 *buffer, int nob)
+{
+ if (!write)
+ return 0;
+
+ return cfs_trace_dump_debug_buffer_usrstr(buffer, nob);
+}
+
+DECLARE_PROC_HANDLER(proc_dump_kernel)
+
+static int __proc_daemon_file(void *data, int write,
+ loff_t pos, void *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);
+}
+
+DECLARE_PROC_HANDLER(proc_daemon_file)
+
+static int __proc_debug_mb(void *data, int write,
+ loff_t pos, void *buffer, int nob)
+{
+ if (!write) {
+ char tmpstr[32];
+ int len = snprintf(tmpstr, sizeof(tmpstr), "%d",
+ cfs_trace_get_debug_mb());
+
+ if (pos >= len)
+ return 0;
+
+ return cfs_trace_copyout_string(buffer, nob, tmpstr + pos,
+ "\n");
+ }
+
+ return cfs_trace_set_debug_mb_usrstr(buffer, nob);
+}
+
+DECLARE_PROC_HANDLER(proc_debug_mb)
+
+int LL_PROC_PROTO(proc_console_max_delay_cs)
+{
+ int rc, max_delay_cs;
+ ctl_table_t dummy = *table;
+ cfs_duration_t d;
+
+ dummy.data = &max_delay_cs;
+ dummy.proc_handler = &proc_dointvec;
+
+ if (!write) { /* read */
+ max_delay_cs = cfs_duration_sec(libcfs_console_max_delay * 100);
+ rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
+ return rc;
+ }
+
+ /* write */
+ max_delay_cs = 0;
+ rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
+ if (rc < 0)
+ return rc;
+ if (max_delay_cs <= 0)
+ return -EINVAL;
+
+ d = cfs_time_seconds(max_delay_cs) / 100;
+ if (d == 0 || d < libcfs_console_min_delay)
+ return -EINVAL;
+ libcfs_console_max_delay = d;
+
+ return rc;
+}
+
+int LL_PROC_PROTO(proc_console_min_delay_cs)
+{
+ int rc, min_delay_cs;
+ ctl_table_t dummy = *table;
+ cfs_duration_t d;
+
+ dummy.data = &min_delay_cs;
+ dummy.proc_handler = &proc_dointvec;
+
+ if (!write) { /* read */
+ min_delay_cs = cfs_duration_sec(libcfs_console_min_delay * 100);
+ rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
+ return rc;
+ }
+
+ /* write */
+ min_delay_cs = 0;
+ rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
+ if (rc < 0)
+ return rc;
+ if (min_delay_cs <= 0)
+ return -EINVAL;
+
+ d = cfs_time_seconds(min_delay_cs) / 100;
+ if (d == 0 || d > libcfs_console_max_delay)
+ return -EINVAL;
+ libcfs_console_min_delay = d;
+
+ return rc;
+}
+
+int LL_PROC_PROTO(proc_console_backoff)
+{
+ int rc, backoff;
+ ctl_table_t dummy = *table;
+
+ dummy.data = &backoff;
+ dummy.proc_handler = &proc_dointvec;
+
+ if (!write) { /* read */
+ backoff= libcfs_console_backoff;
+ rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
+ return rc;
+ }
+
+ /* write */
+ backoff = 0;
+ rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
+ if (rc < 0)
+ return rc;
+ if (backoff <= 0)
+ return -EINVAL;
+
+ libcfs_console_backoff = backoff;
+
+ return rc;
+}
+
+int LL_PROC_PROTO(libcfs_force_lbug)
+{
+ if (write)
+ LBUG();
+ return 0;
+}
+
+int LL_PROC_PROTO(proc_fail_loc)
+{
+ int rc;
+ long old_fail_loc = cfs_fail_loc;
+
+ rc = ll_proc_dolongvec(table, write, filp, 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 *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;
+
+ LIBCFS_FREE(buf, len);
+ if (rc == -EFBIG) {
+ 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;
+}
+DECLARE_PROC_HANDLER(proc_cpt_table)
+
+static ctl_table_t lnet_table[] = {
+ /*
+ * NB No .strategy entries have been provided since sysctl(8) prefers
+ * to go via /proc for portability.
+ */
+ {
+ INIT_CTL_NAME(PSDEV_DEBUG)
+ .procname = "debug",
+ .data = &libcfs_debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dobitmasks,
+ },
+ {
+ INIT_CTL_NAME(PSDEV_SUBSYSTEM_DEBUG)
+ .procname = "subsystem_debug",
+ .data = &libcfs_subsystem_debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dobitmasks,
+ },
+ {
+ INIT_CTL_NAME(PSDEV_PRINTK)
+ .procname = "printk",
+ .data = &libcfs_printk,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dobitmasks,
+ },
+ {
+ INIT_CTL_NAME(PSDEV_CONSOLE_RATELIMIT)
+ .procname = "console_ratelimit",
+ .data = &libcfs_console_ratelimit,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME(PSDEV_CONSOLE_MAX_DELAY_CS)
+ .procname = "console_max_delay_centisecs",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_console_max_delay_cs
+ },
+ {
+ INIT_CTL_NAME(PSDEV_CONSOLE_MIN_DELAY_CS)
+ .procname = "console_min_delay_centisecs",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_console_min_delay_cs
+ },
+ {
+ INIT_CTL_NAME(PSDEV_CONSOLE_BACKOFF)
+ .procname = "console_backoff",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_console_backoff
+ },
+
+ {
+ INIT_CTL_NAME(PSDEV_DEBUG_PATH)
+ .procname = "debug_path",
+ .data = libcfs_debug_file_path_arr,
+ .maxlen = sizeof(libcfs_debug_file_path_arr),
+ .mode = 0644,
+ .proc_handler = &proc_dostring,
+ },
+
+ {
+ INIT_CTL_NAME(PSDEV_CPT_TABLE)
+ .procname = "cpu_partition_table",
+ .maxlen = 128,
+ .mode = 0444,
+ .proc_handler = &proc_cpt_table,
+ },
+
+ {
+ INIT_CTL_NAME(PSDEV_LNET_UPCALL)
+ .procname = "upcall",
+ .data = lnet_upcall,
+ .maxlen = sizeof(lnet_upcall),
+ .mode = 0644,
+ .proc_handler = &proc_dostring,
+ },
+ {
+ INIT_CTL_NAME(PSDEV_LNET_DEBUG_LOG_UPCALL)
+ .procname = "debug_log_upcall",
+ .data = lnet_debug_log_upcall,
+ .maxlen = sizeof(lnet_debug_log_upcall),
+ .mode = 0644,
+ .proc_handler = &proc_dostring,
+ },
+ {
+ INIT_CTL_NAME(PSDEV_LNET_MEMUSED)
+ .procname = "lnet_memused",
+ .data = (int *)&libcfs_kmemory.counter,
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ INIT_STRATEGY(&sysctl_intvec)
+ },
+ {
+ INIT_CTL_NAME(PSDEV_LNET_CATASTROPHE)
+ .procname = "catastrophe",
+ .data = &libcfs_catastrophe,
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ INIT_STRATEGY(&sysctl_intvec)
+ },
+ {
+ INIT_CTL_NAME(PSDEV_LNET_PANIC_ON_LBUG)
+ .procname = "panic_on_lbug",
+ .data = &libcfs_panic_on_lbug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ INIT_STRATEGY(&sysctl_intvec)
+ },
+ {
+ INIT_CTL_NAME(PSDEV_LNET_DUMP_KERNEL)
+ .procname = "dump_kernel",
+ .maxlen = 256,
+ .mode = 0200,
+ .proc_handler = &proc_dump_kernel,
+ },
+ {
+ INIT_CTL_NAME(PSDEV_LNET_DAEMON_FILE)
+ .procname = "daemon_file",
+ .mode = 0644,
+ .maxlen = 256,
+ .proc_handler = &proc_daemon_file,
+ },
+ {
+ INIT_CTL_NAME(PSDEV_LNET_DEBUG_MB)
+ .procname = "debug_mb",
+ .mode = 0644,
+ .proc_handler = &proc_debug_mb,
+ },
+ {
+ INIT_CTL_NAME(PSDEV_LNET_WATCHDOG_RATELIMIT)
+ .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(PSDEV_LNET_FORCE_LBUG)
+ .procname = "force_lbug",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0200,
+ .proc_handler = &libcfs_force_lbug
+ },
+ {
+ INIT_CTL_NAME(PSDEV_LNET_FAIL_LOC)
+ .procname = "fail_loc",
+ .data = &cfs_fail_loc,
+ .maxlen = sizeof(cfs_fail_loc),
+ .mode = 0644,
+ .proc_handler = &proc_fail_loc
+ },
+ {
+ INIT_CTL_NAME(PSDEV_LNET_FAIL_VAL)
+ .procname = "fail_val",
+ .data = &cfs_fail_val,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ INIT_CTL_NAME(0)
+ }
+};
+
+#ifdef CONFIG_SYSCTL
+static ctl_table_t top_table[] = {
+ {
+ INIT_CTL_NAME(CTL_LNET)
+ .procname = "lnet",
+ .mode = 0555,
+ .data = NULL,
+ .maxlen = 0,
+ .child = lnet_table,
+ },
+ {
+ INIT_CTL_NAME(0)
+ }
+};
+#endif
+
+int insert_proc(void)
+{
+#ifdef CONFIG_SYSCTL
+ if (lnet_table_header == NULL)
+ lnet_table_header = cfs_register_sysctl_table(top_table, 0);
+#endif
+ return 0;
+}
+
+void remove_proc(void)
+{
+#ifdef CONFIG_SYSCTL
+ if (lnet_table_header != NULL)
+ unregister_sysctl_table(lnet_table_header);
+
+ lnet_table_header = NULL;
+#endif
+}
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-04 04:39:31 +0000