133 lines
4.6 KiB
C
133 lines
4.6 KiB
C
/*****************************************************************************\
|
|
* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
|
|
* Copyright (C) 2007 The Regents of the University of California.
|
|
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
|
|
* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
|
|
* UCRL-CODE-235197
|
|
*
|
|
* This file is part of the SPL, Solaris Porting Layer.
|
|
* For details, see <http://github.com/behlendorf/spl/>.
|
|
*
|
|
* The SPL is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* The SPL 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
|
|
* for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
|
|
\*****************************************************************************/
|
|
|
|
#ifndef _SPL_TRACE_H
|
|
#define _SPL_TRACE_H
|
|
|
|
#define TCD_MAX_PAGES (5 << (20 - PAGE_SHIFT))
|
|
#define TCD_STOCK_PAGES (TCD_MAX_PAGES)
|
|
#define TRACE_CONSOLE_BUFFER_SIZE 1024
|
|
|
|
#define SPL_DEFAULT_MAX_DELAY (600 * HZ)
|
|
#define SPL_DEFAULT_MIN_DELAY ((HZ + 1) / 2)
|
|
#define SPL_DEFAULT_BACKOFF 2
|
|
|
|
#define DL_NOTHREAD 0x0001 /* Do not create a new thread */
|
|
#define DL_SINGLE_CPU 0x0002 /* Collect pages from this CPU*/
|
|
|
|
typedef struct dumplog_priv {
|
|
wait_queue_head_t dp_waitq;
|
|
pid_t dp_pid;
|
|
int dp_flags;
|
|
atomic_t dp_done;
|
|
} dumplog_priv_t;
|
|
|
|
/* Three trace data types */
|
|
typedef enum {
|
|
TCD_TYPE_PROC,
|
|
TCD_TYPE_SOFTIRQ,
|
|
TCD_TYPE_IRQ,
|
|
TCD_TYPE_MAX
|
|
} tcd_type_t;
|
|
|
|
union trace_data_union {
|
|
struct trace_cpu_data {
|
|
/* pages with trace records not yet processed by tracefiled */
|
|
struct list_head tcd_pages;
|
|
/* number of pages on ->tcd_pages */
|
|
unsigned long tcd_cur_pages;
|
|
/* Max number of pages allowed on ->tcd_pages */
|
|
unsigned long tcd_max_pages;
|
|
|
|
/*
|
|
* preallocated pages to write trace records into. Pages from
|
|
* ->tcd_stock_pages are moved to ->tcd_pages by spl_debug_msg().
|
|
*
|
|
* This list is necessary, because on some platforms it's
|
|
* impossible to perform efficient atomic page allocation in a
|
|
* non-blockable context.
|
|
*
|
|
* Such platforms fill ->tcd_stock_pages "on occasion", when
|
|
* tracing code is entered in blockable context.
|
|
*
|
|
* trace_get_tage_try() tries to get a page from
|
|
* ->tcd_stock_pages first and resorts to atomic page
|
|
* allocation only if this queue is empty. ->tcd_stock_pages
|
|
* is replenished when tracing code is entered in blocking
|
|
* context (darwin-tracefile.c:trace_get_tcd()). We try to
|
|
* maintain TCD_STOCK_PAGES (40 by default) pages in this
|
|
* queue. Atomic allocation is only required if more than
|
|
* TCD_STOCK_PAGES pagesful are consumed by trace records all
|
|
* emitted in non-blocking contexts. Which is quite unlikely.
|
|
*/
|
|
struct list_head tcd_stock_pages;
|
|
/* number of pages on ->tcd_stock_pages */
|
|
unsigned long tcd_cur_stock_pages;
|
|
|
|
unsigned short tcd_shutting_down;
|
|
unsigned short tcd_cpu;
|
|
unsigned short tcd_type;
|
|
/* The factors to share debug memory. */
|
|
unsigned short tcd_pages_factor;
|
|
|
|
/*
|
|
* This spinlock is needed to workaround the problem of
|
|
* set_cpus_allowed() being GPL-only. Since we cannot
|
|
* schedule a thread on a specific CPU when dumping the
|
|
* pages, we must use the spinlock for mutual exclusion.
|
|
*/
|
|
spinlock_t tcd_lock;
|
|
unsigned long tcd_lock_flags;
|
|
} tcd;
|
|
char __pad[L1_CACHE_ALIGN(sizeof(struct trace_cpu_data))];
|
|
};
|
|
|
|
extern union trace_data_union (*trace_data[TCD_TYPE_MAX])[NR_CPUS];
|
|
|
|
#define tcd_for_each(tcd, i, j) \
|
|
for (i = 0; i < TCD_TYPE_MAX && trace_data[i]; i++) \
|
|
for (j = 0, ((tcd) = &(*trace_data[i])[j].tcd); \
|
|
j < num_possible_cpus(); j++, (tcd) = &(*trace_data[i])[j].tcd)
|
|
|
|
#define tcd_for_each_type_lock(tcd, i, cpu) \
|
|
for (i = 0; i < TCD_TYPE_MAX && trace_data[i] && \
|
|
(tcd = &(*trace_data[i])[cpu].tcd) && \
|
|
trace_lock_tcd(tcd); trace_unlock_tcd(tcd), i++)
|
|
|
|
struct trace_page {
|
|
struct page *page; /* page itself */
|
|
struct list_head linkage; /* Used by trace_data_union */
|
|
unsigned int used; /* number of bytes used within this page */
|
|
unsigned short cpu; /* cpu that owns this page */
|
|
unsigned short type; /* type(context) of this page */
|
|
};
|
|
|
|
struct page_collection {
|
|
struct list_head pc_pages;
|
|
spinlock_t pc_lock;
|
|
int pc_want_daemon_pages;
|
|
};
|
|
|
|
#endif /* SPL_TRACE_H */
|