5c1967ebe2
While portions of the code needed to support z_compress_level() and z_uncompress() where in place. In reality the current implementation was non-functional, it just was compilable. The critical missing component was to setup a workspace for the compress/uncompress stream structures to use. A kmem_cache was added for the workspace area because we require a large chunk of memory. This avoids to need to continually alloc/free this memory and vmap() the pages which is very slow. Several objects will reside in the per-cpu kmem_cache making them quick to acquire and release. A further optimization would be to adjust the implementation to additional ensure the memory is local to the cpu. Currently that may not be the case.
193 lines
6.4 KiB
C
193 lines
6.4 KiB
C
/*****************************************************************************\
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://github.com/behlendorf/spl/>.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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\*****************************************************************************/
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/*
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* Available debug functions. These function should be used by any
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* package which needs to integrate with the SPL log infrastructure.
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*
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* SDEBUG() - Log debug message with specified mask.
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* SDEBUG_LIMIT() - Log just 1 debug message with specified mask.
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* SWARN() - Log a warning message.
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* SERROR() - Log an error message.
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* SEMERG() - Log an emergency error message.
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* SCONSOLE() - Log a generic message to the console.
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*
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* SENTRY - Log entry point to a function.
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* SEXIT - Log exit point from a function.
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* SRETURN(x) - Log return from a function.
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* SGOTO(x, y) - Log goto within a function.
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*/
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#ifndef _SPL_DEBUG_INTERNAL_H
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#define _SPL_DEBUG_INTERNAL_H
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#include <linux/limits.h>
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#define SS_UNDEFINED 0x00000001
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#define SS_ATOMIC 0x00000002
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#define SS_KOBJ 0x00000004
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#define SS_VNODE 0x00000008
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#define SS_TIME 0x00000010
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#define SS_RWLOCK 0x00000020
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#define SS_THREAD 0x00000040
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#define SS_CONDVAR 0x00000080
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#define SS_MUTEX 0x00000100
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#define SS_RNG 0x00000200
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#define SS_TASKQ 0x00000400
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#define SS_KMEM 0x00000800
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#define SS_DEBUG 0x00001000
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#define SS_GENERIC 0x00002000
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#define SS_PROC 0x00004000
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#define SS_MODULE 0x00008000
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#define SS_CRED 0x00010000
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#define SS_KSTAT 0x00020000
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#define SS_XDR 0x00040000
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#define SS_TSD 0x00080000
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#define SS_ZLIB 0x00100000
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#define SS_USER1 0x01000000
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#define SS_USER2 0x02000000
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#define SS_USER3 0x04000000
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#define SS_USER4 0x08000000
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#define SS_USER5 0x10000000
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#define SS_USER6 0x20000000
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#define SS_USER7 0x40000000
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#define SS_USER8 0x80000000
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#define SS_DEBUG_SUBSYS SS_UNDEFINED
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#define SD_TRACE 0x00000001
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#define SD_INFO 0x00000002
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#define SD_WARNING 0x00000004
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#define SD_ERROR 0x00000008
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#define SD_EMERG 0x00000010
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#define SD_CONSOLE 0x00000020
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#define SD_IOCTL 0x00000040
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#define SD_DPRINTF 0x00000080
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#define SD_OTHER 0x00000100
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#define SD_CANTMASK (SD_ERROR | SD_EMERG | SD_WARNING | SD_CONSOLE)
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#ifdef NDEBUG /* Debugging Disabled */
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#define SDEBUG(mask, fmt, a...) ((void)0)
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#define SDEBUG_LIMIT(x, y, fmt, a...) ((void)0)
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#define SWARN(fmt, a...) ((void)0)
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#define SERROR(fmt, a...) ((void)0)
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#define SEMERG(fmt, a...) ((void)0)
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#define SCONSOLE(mask, fmt, a...) ((void)0)
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#define SENTRY ((void)0)
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#define SEXIT ((void)0)
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#define SRETURN(x) return (x)
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#define SGOTO(x, y) { ((void)(y)); goto x; }
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#else /* Debugging Enabled */
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#define __SDEBUG(cdls, subsys, mask, format, a...) \
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do { \
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if (((mask) & SD_CANTMASK) != 0 || \
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((spl_debug_mask & (mask)) != 0 && \
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(spl_debug_subsys & (subsys)) != 0)) \
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spl_debug_msg(cdls, subsys, mask, __FILE__, \
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__FUNCTION__, __LINE__, format, ## a); \
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} while (0)
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#define SDEBUG(mask, format, a...) \
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__SDEBUG(NULL, SS_DEBUG_SUBSYS, mask, format, ## a)
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#define __SDEBUG_LIMIT(subsys, mask, format, a...) \
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do { \
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static spl_debug_limit_state_t cdls; \
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\
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__SDEBUG(&cdls, subsys, mask, format, ## a); \
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} while (0)
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#define SDEBUG_LIMIT(mask, format, a...) \
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__SDEBUG_LIMIT(SS_DEBUG_SUBSYS, mask, format, ## a)
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#define SWARN(fmt, a...) SDEBUG_LIMIT(SD_WARNING, fmt, ## a)
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#define SERROR(fmt, a...) SDEBUG_LIMIT(SD_ERROR, fmt, ## a)
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#define SEMERG(fmt, a...) SDEBUG_LIMIT(SD_EMERG, fmt, ## a)
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#define SCONSOLE(mask, fmt, a...) SDEBUG(SD_CONSOLE | (mask), fmt, ## a)
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#define SENTRY SDEBUG(SD_TRACE, "Process entered\n")
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#define SEXIT SDEBUG(SD_TRACE, "Process leaving\n")
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#define SRETURN(rc) \
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do { \
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typeof(rc) RETURN__ret = (rc); \
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SDEBUG(SD_TRACE, "Process leaving (rc=%lu : %ld : %lx)\n", \
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(long)RETURN__ret, (long)RETURN__ret, (long)RETURN__ret); \
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return RETURN__ret; \
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} while (0)
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#define SGOTO(label, rc) \
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do { \
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long GOTO__ret = (long)(rc); \
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SDEBUG(SD_TRACE,"Process leaving via %s (rc=%lu : %ld : %lx)\n",\
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#label, (unsigned long)GOTO__ret, (signed long)GOTO__ret, \
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(signed long)GOTO__ret); \
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goto label; \
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} while (0)
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#endif /* NDEBUG */
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typedef struct {
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unsigned long cdls_next;
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int cdls_count;
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long cdls_delay;
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} spl_debug_limit_state_t;
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/* Global debug variables */
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extern unsigned long spl_debug_subsys;
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extern unsigned long spl_debug_mask;
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extern unsigned long spl_debug_printk;
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extern int spl_debug_mb;
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extern unsigned int spl_debug_binary;
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extern unsigned int spl_debug_catastrophe;
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extern unsigned int spl_debug_panic_on_bug;
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extern char spl_debug_file_path[PATH_MAX];
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extern unsigned int spl_console_ratelimit;
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extern long spl_console_max_delay;
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extern long spl_console_min_delay;
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extern unsigned int spl_console_backoff;
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extern unsigned int spl_debug_stack;
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/* Exported debug functions */
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extern int spl_debug_mask2str(char *str, int size, unsigned long mask, int ss);
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extern int spl_debug_str2mask(unsigned long *mask, const char *str, int ss);
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extern unsigned long spl_debug_set_mask(unsigned long mask);
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extern unsigned long spl_debug_get_mask(void);
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extern unsigned long spl_debug_set_subsys(unsigned long mask);
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extern unsigned long spl_debug_get_subsys(void);
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extern int spl_debug_set_mb(int mb);
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extern int spl_debug_get_mb(void);
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extern int spl_debug_dumplog(int flags);
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extern void spl_debug_dumpstack(struct task_struct *tsk);
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extern int spl_debug_clear_buffer(void);
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extern int spl_debug_mark_buffer(char *text);
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int debug_init(void);
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void debug_fini(void);
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#endif /* SPL_DEBUG_INTERNAL_H */
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