1/*
2 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_types.h"
21#include "xfs_log.h"
22#include "xfs_inum.h"
23#include "xfs_trans.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
26#include "xfs_mount.h"
27#include "xfs_bmap_btree.h"
28#include "xfs_dinode.h"
29#include "xfs_inode.h"
30#include "xfs_utils.h"
31#include "xfs_error.h"
32
33#ifdef DEBUG
34
35int	xfs_etrap[XFS_ERROR_NTRAP] = {
36	0,
37};
38
39int
40xfs_error_trap(int e)
41{
42	int i;
43
44	if (!e)
45		return 0;
46	for (i = 0; i < XFS_ERROR_NTRAP; i++) {
47		if (xfs_etrap[i] == 0)
48			break;
49		if (e != xfs_etrap[i])
50			continue;
51		cmn_err(CE_NOTE, "xfs_error_trap: error %d", e);
52		BUG();
53		break;
54	}
55	return e;
56}
57
58int	xfs_etest[XFS_NUM_INJECT_ERROR];
59int64_t	xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
60char *	xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
61
62int
63xfs_error_test(int error_tag, int *fsidp, char *expression,
64	       int line, char *file, unsigned long randfactor)
65{
66	int i;
67	int64_t fsid;
68
69	if (random32() % randfactor)
70		return 0;
71
72	memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
73
74	for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
75		if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
76			cmn_err(CE_WARN,
77	"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
78				expression, file, line, xfs_etest_fsname[i]);
79			return 1;
80		}
81	}
82
83	return 0;
84}
85
86int
87xfs_errortag_add(int error_tag, xfs_mount_t *mp)
88{
89	int i;
90	int len;
91	int64_t fsid;
92
93	memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
94
95	for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
96		if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
97			cmn_err(CE_WARN, "XFS error tag #%d on", error_tag);
98			return 0;
99		}
100	}
101
102	for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
103		if (xfs_etest[i] == 0) {
104			cmn_err(CE_WARN, "Turned on XFS error tag #%d",
105				error_tag);
106			xfs_etest[i] = error_tag;
107			xfs_etest_fsid[i] = fsid;
108			len = strlen(mp->m_fsname);
109			xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
110			strcpy(xfs_etest_fsname[i], mp->m_fsname);
111			return 0;
112		}
113	}
114
115	cmn_err(CE_WARN, "error tag overflow, too many turned on");
116
117	return 1;
118}
119
120int
121xfs_errortag_clearall(xfs_mount_t *mp, int loud)
122{
123	int64_t fsid;
124	int cleared = 0;
125	int i;
126
127	memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
128
129
130	for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
131		if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
132		     xfs_etest[i] != 0) {
133			cleared = 1;
134			cmn_err(CE_WARN, "Clearing XFS error tag #%d",
135				xfs_etest[i]);
136			xfs_etest[i] = 0;
137			xfs_etest_fsid[i] = 0LL;
138			kmem_free(xfs_etest_fsname[i]);
139			xfs_etest_fsname[i] = NULL;
140		}
141	}
142
143	if (loud || cleared)
144		cmn_err(CE_WARN,
145			"Cleared all XFS error tags for filesystem \"%s\"",
146			mp->m_fsname);
147
148	return 0;
149}
150#endif /* DEBUG */
151
152
153void
154xfs_fs_cmn_err(int level, xfs_mount_t *mp, char *fmt, ...)
155{
156	va_list ap;
157
158	va_start(ap, fmt);
159	xfs_fs_vcmn_err(level, mp, fmt, ap);
160	va_end(ap);
161}
162
163void
164xfs_cmn_err(int panic_tag, int level, xfs_mount_t *mp, char *fmt, ...)
165{
166	va_list ap;
167
168#ifdef DEBUG
169	xfs_panic_mask |= (XFS_PTAG_SHUTDOWN_CORRUPT | XFS_PTAG_LOGRES);
170#endif
171
172	if (xfs_panic_mask && (xfs_panic_mask & panic_tag)
173	    && (level & CE_ALERT)) {
174		level &= ~CE_ALERT;
175		level |= CE_PANIC;
176		cmn_err(CE_ALERT, "XFS: Transforming an alert into a BUG.");
177	}
178	va_start(ap, fmt);
179	xfs_fs_vcmn_err(level, mp, fmt, ap);
180	va_end(ap);
181}
182
183void
184xfs_error_report(
185	const char		*tag,
186	int			level,
187	struct xfs_mount	*mp,
188	const char		*filename,
189	int			linenum,
190	inst_t			*ra)
191{
192	if (level <= xfs_error_level) {
193		xfs_cmn_err(XFS_PTAG_ERROR_REPORT,
194			    CE_ALERT, mp,
195		"XFS internal error %s at line %d of file %s.  Caller 0x%p\n",
196			    tag, linenum, filename, ra);
197
198		xfs_stack_trace();
199	}
200}
201
202void
203xfs_corruption_error(
204	const char		*tag,
205	int			level,
206	struct xfs_mount	*mp,
207	void			*p,
208	const char		*filename,
209	int			linenum,
210	inst_t			*ra)
211{
212	if (level <= xfs_error_level)
213		xfs_hex_dump(p, 16);
214	xfs_error_report(tag, level, mp, filename, linenum, ra);
215}
216