1 /* Copyright (C) 2006 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
2
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License as published by
5 the Free Software Foundation; version 2 of the License.
6
7 This program is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY; without even the implied warranty of
9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 GNU General Public License for more details.
11
12 You should have received a copy of the GNU General Public License
13 along with this program; if not, write to the Free Software
14 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
15
16 #include "ma_fulltext.h"
17
18 /*
19 Stop usage of Maria
20
21 SYNOPSIS
22 maria_panic()
23 flag HA_PANIC_CLOSE: All maria files (tables and log) are closed.
24 maria_end() is called.
25 HA_PANIC_WRITE: All misam files are unlocked and
26 all changed data in single user maria is
27 written to file
28 HA_PANIC_READ All maria files that was locked when
29 maria_panic(HA_PANIC_WRITE) was done is
30 locked. A maria_readinfo() is done for
31 all single user files to get changes
32 in database
33
34 RETURN
35 0 ok
36 # error number in case of error
37 */
38
maria_panic(enum ha_panic_function flag)39 int maria_panic(enum ha_panic_function flag)
40 {
41 int error=0;
42 LIST *list_element,*next_open;
43 MARIA_HA *info;
44 DBUG_ENTER("maria_panic");
45
46 if (!maria_inited)
47 DBUG_RETURN(0);
48 mysql_mutex_lock(&THR_LOCK_maria);
49 for (list_element=maria_open_list ; list_element ; list_element=next_open)
50 {
51 next_open=list_element->next; /* Save if close */
52 info=(MARIA_HA*) list_element->data;
53 switch (flag) {
54 case HA_PANIC_CLOSE:
55 /*
56 If bad luck (if some tables would be used now, which normally does not
57 happen in MySQL), as we release the mutex, the list may change and so
58 we may crash.
59 */
60 mysql_mutex_unlock(&THR_LOCK_maria);
61 if (maria_close(info))
62 error=my_errno;
63 mysql_mutex_lock(&THR_LOCK_maria);
64 break;
65 case HA_PANIC_WRITE: /* Do this to free databases */
66 #ifdef CANT_OPEN_FILES_TWICE
67 if (info->s->options & HA_OPTION_READ_ONLY_DATA)
68 break;
69 #endif
70 if (_ma_flush_table_files(info, MARIA_FLUSH_DATA | MARIA_FLUSH_INDEX,
71 FLUSH_RELEASE, FLUSH_RELEASE))
72 error=my_errno;
73 if (info->opt_flag & WRITE_CACHE_USED)
74 if (flush_io_cache(&info->rec_cache))
75 error=my_errno;
76 if (info->opt_flag & READ_CACHE_USED)
77 {
78 if (flush_io_cache(&info->rec_cache))
79 error=my_errno;
80 reinit_io_cache(&info->rec_cache,READ_CACHE,0,
81 (pbool) (info->lock_type != F_UNLCK),1);
82 }
83 if (info->lock_type != F_UNLCK && ! info->was_locked)
84 {
85 info->was_locked=info->lock_type;
86 if (maria_lock_database(info,F_UNLCK))
87 error=my_errno;
88 }
89 #ifdef CANT_OPEN_FILES_TWICE
90 if (info->s->kfile.file >= 0 && mysql_file_close(info->s->kfile.file, MYF(0)))
91 error = my_errno;
92 if (info->dfile.file >= 0 && mysql_file_close(info->dfile.file, MYF(0)))
93 error = my_errno;
94 info->s->kfile.file= info->dfile.file= -1;/* Files aren't open anymore */
95 #endif
96 break;
97 case HA_PANIC_READ: /* Restore to before WRITE */
98 #ifdef CANT_OPEN_FILES_TWICE
99 { /* Open closed files */
100 char name_buff[FN_REFLEN];
101 MARIA_SHARE *share= info->s;
102 if (share->kfile.file < 0)
103 {
104
105 if ((share->kfile.file= mysql_file_open(key_file_kfile,
106 fn_format(name_buff, info->filename, "",
107 N_NAME_IEXT,4),
108 info->mode, MYF(MY_WME))) < 0)
109 error = my_errno;
110 }
111 if (info->dfile.file < 0)
112 {
113 if ((info->dfile.file= mysql_file_open(key_file_dfile,
114 fn_format(name_buff, info->filename,
115 "", N_NAME_DEXT, 4),
116 info->mode, MYF(MY_WME))) < 0)
117 error = my_errno;
118 info->rec_cache.file= info->dfile.file;
119 }
120 if (share->bitmap.file.file < 0)
121 share->bitmap.file.file= info->dfile.file;
122 }
123 #endif
124 if (info->was_locked)
125 {
126 if (maria_lock_database(info, info->was_locked))
127 error=my_errno;
128 info->was_locked=0;
129 }
130 break;
131 }
132 }
133 mysql_mutex_unlock(&THR_LOCK_maria);
134 if (flag == HA_PANIC_CLOSE)
135 maria_end();
136 if (!error)
137 DBUG_RETURN(0);
138 DBUG_RETURN(my_errno=error);
139 } /* maria_panic */
140