forked from luck/tmp_suning_uos_patched
742ae1e35b
Running a CONFIG_XFS_DEBUG kernel in production environments is not the best idea as it introduces significant overhead, can change the behaviour of algorithms (such as allocation) to improve test coverage, and (most importantly) panic the machine on non-fatal errors. There are many cases where all we want to do is run a kernel with more bounds checking enabled, such as is provided by the ASSERT() statements throughout the code, but without all the potential overhead and drawbacks. This patch converts all the ASSERT statements to evaluate as WARN_ON(1) statements and hence if they fail dump a warning and a stack trace to the log. This has minimal overhead and does not change any algorithms, and will allow us to find strange "out of bounds" problems more easily on production machines. There are a few places where assert statements contain debug only code. These are converted to be debug-or-warn only code so that we still get all the assert checks in the code. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*
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* Copyright (c) 2011 Red Hat, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_types.h"
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#include "xfs_log.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_mount.h"
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/*
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* XFS logging functions
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*/
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static void
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__xfs_printk(
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const char *level,
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const struct xfs_mount *mp,
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struct va_format *vaf)
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{
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if (mp && mp->m_fsname) {
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printk("%sXFS (%s): %pV\n", level, mp->m_fsname, vaf);
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return;
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}
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printk("%sXFS: %pV\n", level, vaf);
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}
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#define define_xfs_printk_level(func, kern_level) \
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void func(const struct xfs_mount *mp, const char *fmt, ...) \
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{ \
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struct va_format vaf; \
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va_list args; \
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\
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va_start(args, fmt); \
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\
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vaf.fmt = fmt; \
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vaf.va = &args; \
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\
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__xfs_printk(kern_level, mp, &vaf); \
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va_end(args); \
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} \
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define_xfs_printk_level(xfs_emerg, KERN_EMERG);
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define_xfs_printk_level(xfs_alert, KERN_ALERT);
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define_xfs_printk_level(xfs_crit, KERN_CRIT);
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define_xfs_printk_level(xfs_err, KERN_ERR);
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define_xfs_printk_level(xfs_warn, KERN_WARNING);
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define_xfs_printk_level(xfs_notice, KERN_NOTICE);
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define_xfs_printk_level(xfs_info, KERN_INFO);
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#ifdef DEBUG
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define_xfs_printk_level(xfs_debug, KERN_DEBUG);
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#endif
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void
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xfs_alert_tag(
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const struct xfs_mount *mp,
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int panic_tag,
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const char *fmt, ...)
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{
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struct va_format vaf;
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va_list args;
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int do_panic = 0;
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if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) {
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xfs_alert(mp, "Transforming an alert into a BUG.");
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do_panic = 1;
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}
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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__xfs_printk(KERN_ALERT, mp, &vaf);
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va_end(args);
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BUG_ON(do_panic);
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}
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void
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asswarn(char *expr, char *file, int line)
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{
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xfs_warn(NULL, "Assertion failed: %s, file: %s, line: %d",
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expr, file, line);
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WARN_ON(1);
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}
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void
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assfail(char *expr, char *file, int line)
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{
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xfs_emerg(NULL, "Assertion failed: %s, file: %s, line: %d",
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expr, file, line);
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BUG();
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}
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void
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xfs_hex_dump(void *p, int length)
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{
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print_hex_dump(KERN_ALERT, "", DUMP_PREFIX_ADDRESS, 16, 1, p, length, 1);
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}
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