1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002 Cluster File Systems, Inc.
5 * Author: Phil Schwan <phil@clusterfs.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or
10 * modify it under the terms of version 2 of the GNU General Public
11 * License as published by the Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with Lustre; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 # define EXPORT_SYMTAB
27 #include <linux/config.h>
28 #include <linux/module.h>
29 #include <linux/kmod.h>
30 #include <linux/notifier.h>
31 #include <linux/kernel.h>
33 #include <linux/string.h>
34 #include <linux/stat.h>
35 #include <linux/errno.h>
36 #include <linux/smp_lock.h>
37 #include <linux/unistd.h>
38 #include <linux/interrupt.h>
39 #include <asm/system.h>
40 #include <asm/uaccess.h>
41 #include <linux/completion.h>
44 #include <linux/stat.h>
45 #include <asm/uaccess.h>
46 #include <asm/segment.h>
47 #include <linux/miscdevice.h>
48 #include <linux/version.h>
50 # define DEBUG_SUBSYSTEM S_PORTALS
52 #include <linux/kp30.h>
53 #include <linux/portals_compat25.h>
54 #include <linux/libcfs.h>
56 #include "tracefile.h"
58 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
59 #include <linux/kallsyms.h>
62 unsigned int portal_subsystem_debug = ~0 - (S_PORTALS | S_QSWNAL | S_SOCKNAL |
64 EXPORT_SYMBOL(portal_subsystem_debug);
66 unsigned int portal_debug = (D_WARNING | D_DLMTRACE | D_ERROR | D_EMERG | D_HA |
67 D_RPCTRACE | D_VFSTRACE);
68 EXPORT_SYMBOL(portal_debug);
70 unsigned int portal_printk;
71 EXPORT_SYMBOL(portal_printk);
73 unsigned int portal_stack;
74 EXPORT_SYMBOL(portal_stack);
77 atomic_t portal_kmemory = ATOMIC_INIT(0);
78 EXPORT_SYMBOL(portal_kmemory);
81 static DECLARE_WAIT_QUEUE_HEAD(debug_ctlwq);
83 char debug_file_path[1024] = "/tmp/lustre-log";
84 static char debug_file_name[1024];
85 static int handled_panic; /* to avoid recursive calls to notifiers */
86 char portals_upcall[1024] = "/usr/lib/lustre/portals_upcall";
88 int portals_do_debug_dumplog(void *arg)
92 kportal_daemonize("");
95 journal_info = current->journal_info;
96 current->journal_info = NULL;
98 snprintf(debug_file_name, sizeof(debug_file_path) - 1,
99 "%s.%ld.%ld", debug_file_path, CURRENT_SECONDS, (long)arg);
100 printk(KERN_ALERT "LustreError: dumping log to %s\n", debug_file_name);
101 tracefile_dump_all_pages(debug_file_name);
103 current->journal_info = journal_info;
104 wake_up(&debug_ctlwq);
108 void portals_debug_dumplog(void)
111 DECLARE_WAITQUEUE(wait, current);
114 /* we're being careful to ensure that the kernel thread is
115 * able to set our state to running as it exits before we
116 * get to schedule() */
117 set_current_state(TASK_INTERRUPTIBLE);
118 add_wait_queue(&debug_ctlwq, &wait);
120 rc = kernel_thread(portals_do_debug_dumplog, (void *)(long)current->pid,
121 CLONE_VM | CLONE_FS | CLONE_FILES);
123 printk(KERN_ERR "LustreError: cannot start log dump thread: "
128 /* be sure to teardown if kernel_thread() failed */
129 remove_wait_queue(&debug_ctlwq, &wait);
130 set_current_state(TASK_RUNNING);
133 static int panic_dumplog(struct notifier_block *self, unsigned long unused1,
141 if (in_interrupt()) {
146 while (current->lock_depth >= 0)
148 portals_debug_dumplog();
152 static struct notifier_block lustre_panic_notifier = {
153 notifier_call : panic_dumplog,
158 int portals_debug_init(unsigned long bufsize)
160 notifier_chain_register(&panic_notifier_list, &lustre_panic_notifier);
161 return tracefile_init();
164 int portals_debug_cleanup(void)
167 notifier_chain_unregister(&panic_notifier_list, &lustre_panic_notifier);
171 int portals_debug_clear_buffer(void)
177 /* Debug markers, although printed by S_PORTALS
178 * should not be be marked as such. */
179 #undef DEBUG_SUBSYSTEM
180 #define DEBUG_SUBSYSTEM S_UNDEFINED
181 int portals_debug_mark_buffer(char *text)
183 CDEBUG(D_TRACE,"***************************************************\n");
184 CDEBUG(D_WARNING, "DEBUG MARKER: %s\n", text);
185 CDEBUG(D_TRACE,"***************************************************\n");
189 #undef DEBUG_SUBSYSTEM
190 #define DEBUG_SUBSYSTEM S_PORTALS
192 void portals_debug_set_level(unsigned int debug_level)
194 printk(KERN_WARNING "Lustre: Setting portals debug level to %08x\n",
196 portal_debug = debug_level;
199 void portals_run_upcall(char **argv)
205 "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
209 argv[0] = portals_upcall;
211 while (argv[argc] != NULL)
216 rc = USERMODEHELPER(argv[0], argv, envp);
218 CERROR("Error %d invoking portals upcall %s %s%s%s%s%s%s%s%s; "
219 "check /proc/sys/portals/upcall\n",
220 rc, argv[0], argv[1],
221 argc < 3 ? "" : ",", argc < 3 ? "" : argv[2],
222 argc < 4 ? "" : ",", argc < 4 ? "" : argv[3],
223 argc < 5 ? "" : ",", argc < 5 ? "" : argv[4],
224 argc < 6 ? "" : ",...");
226 CERROR("Invoked portals upcall %s %s%s%s%s%s%s%s%s\n",
228 argc < 3 ? "" : ",", argc < 3 ? "" : argv[2],
229 argc < 4 ? "" : ",", argc < 4 ? "" : argv[3],
230 argc < 5 ? "" : ",", argc < 5 ? "" : argv[4],
231 argc < 6 ? "" : ",...");
235 void portals_run_lbug_upcall(char *file, const char *fn, const int line)
241 snprintf (buf, sizeof buf, "%d", line);
245 argv[3] = (char *)fn;
249 portals_run_upcall (argv);
252 char *portals_nid2str(int nal, ptl_nid_t nid, char *str)
254 if (nid == PTL_NID_ANY) {
255 snprintf(str, PTL_NALFMT_SIZE, "%s", "PTL_NID_ANY");
260 /* XXX this could be a nal method of some sort, 'cept it's config
261 * dependent whether (say) socknal NIDs are actually IP addresses... */
268 snprintf(str, PTL_NALFMT_SIZE, "%u:%u.%u.%u.%u",
269 (__u32)(nid >> 32), HIPQUAD(nid));
273 snprintf(str, PTL_NALFMT_SIZE, "%u:%u",
274 (__u32)(nid >> 32), (__u32)nid);
278 snprintf(str, PTL_NALFMT_SIZE, "?%x? %llx",
279 nal, (long long)nid);
285 char *portals_id2str(int nal, ptl_process_id_t id, char *str)
289 portals_nid2str(nal, id.nid, str);
291 snprintf(str + len, PTL_NALFMT_SIZE, "-%u", id.pid);
296 char stack_backtrace[LUSTRE_TRACE_SIZE];
297 spinlock_t stack_backtrace_lock = SPIN_LOCK_UNLOCKED;
299 #if defined(__arch_um__)
301 char *portals_debug_dumpstack(void)
304 return "dump stack\n";
307 #elif defined(__i386__)
309 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
310 extern int lookup_symbol(unsigned long address, char *buf, int buflen);
311 const char *kallsyms_lookup(unsigned long addr,
312 unsigned long *symbolsize,
313 unsigned long *offset,
314 char **modname, char *namebuf)
316 int rc = lookup_symbol(addr, namebuf, 128);
323 char *portals_debug_dumpstack(void)
325 unsigned long esp = current->thread.esp, addr;
326 unsigned long *stack = (unsigned long *)&esp;
327 char *buf = stack_backtrace, *pbuf = buf;
330 /* User space on another CPU? */
331 if ((esp ^ (unsigned long)current) & (PAGE_MASK << 1)){
336 size = sprintf(pbuf, " Call Trace: ");
338 while (((long) stack & (THREAD_SIZE - 1)) != 0) {
340 if (kernel_text_address(addr)) {
341 const char *sym_name;
342 char *modname, buffer[128];
343 unsigned long junk, offset;
345 sym_name = kallsyms_lookup(addr, &junk, &offset,
347 if (sym_name == NULL) {
348 if (buf + LUSTRE_TRACE_SIZE <= pbuf + 12)
350 size = sprintf(pbuf, "[<%08lx>] ", addr);
352 if (buf + LUSTRE_TRACE_SIZE
353 /* fix length + sizeof('\0') */
354 <= pbuf + strlen(buffer) + 28 + 1)
356 size = sprintf(pbuf, "([<%08lx>] %s (0x%p)) ",
357 addr, buffer, stack - 1);
366 #else /* !__arch_um__ && !__i386__ */
368 char *portals_debug_dumpstack(void)
370 char *buf = stack_backtrace;
375 #endif /* __arch_um__ */
376 struct task_struct *portals_current(void)
378 CWARN("current task struct is %p\n", current);
382 EXPORT_SYMBOL(stack_backtrace_lock);
383 EXPORT_SYMBOL(portals_debug_dumpstack);
384 EXPORT_SYMBOL(portals_current);
385 #endif /* __KERNEL__ */
387 EXPORT_SYMBOL(portals_debug_dumplog);
388 EXPORT_SYMBOL(portals_debug_set_level);
389 EXPORT_SYMBOL(portals_run_upcall);
390 EXPORT_SYMBOL(portals_run_lbug_upcall);
391 EXPORT_SYMBOL(portals_nid2str);
392 EXPORT_SYMBOL(portals_id2str);