1 /* Copyright (c) 2000, 2003, 2005, 2006 MySQL AB, 2009 Sun Microsystems, Inc.
2 Use is subject to license terms.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; version 2 of the License.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
16
17 #include "fulltext.h"
18
19 /* if flag == HA_PANIC_CLOSE then all misam files are closed */
20 /* if flag == HA_PANIC_WRITE then all misam files are unlocked and
21 all changed data in single user misam is written to file */
22 /* if flag == HA_PANIC_READ then all misam files that was locked when
23 mi_panic(HA_PANIC_WRITE) was done is locked. A mi_readinfo() is
24 done for all single user files to get changes in database */
25
26
mi_panic(enum ha_panic_function flag)27 int mi_panic(enum ha_panic_function flag)
28 {
29 int error=0;
30 LIST *list_element,*next_open;
31 MI_INFO *info;
32 DBUG_ENTER("mi_panic");
33
34 mysql_mutex_lock(&THR_LOCK_myisam);
35 for (list_element=myisam_open_list ; list_element ; list_element=next_open)
36 {
37 next_open=list_element->next; /* Save if close */
38 info=(MI_INFO*) list_element->data;
39 switch (flag) {
40 case HA_PANIC_CLOSE:
41 mysql_mutex_unlock(&THR_LOCK_myisam); /* Not exactly right... */
42 if (mi_close(info))
43 error=my_errno;
44 mysql_mutex_lock(&THR_LOCK_myisam);
45 break;
46 case HA_PANIC_WRITE: /* Do this to free databases */
47 #ifdef CANT_OPEN_FILES_TWICE
48 if (info->s->options & HA_OPTION_READ_ONLY_DATA)
49 break;
50 #endif
51 if (flush_key_blocks(info->s->key_cache, info->s->kfile,
52 &info->s->dirty_part_map, FLUSH_RELEASE))
53 error=my_errno;
54 if (info->opt_flag & WRITE_CACHE_USED)
55 if (flush_io_cache(&info->rec_cache))
56 error=my_errno;
57 if (info->opt_flag & READ_CACHE_USED)
58 {
59 if (flush_io_cache(&info->rec_cache))
60 error=my_errno;
61 reinit_io_cache(&info->rec_cache,READ_CACHE,0,
62 (pbool) (info->lock_type != F_UNLCK),1);
63 }
64 if (info->lock_type != F_UNLCK && ! info->was_locked)
65 {
66 info->was_locked=info->lock_type;
67 if (mi_lock_database(info,F_UNLCK))
68 error=my_errno;
69 }
70 #ifdef CANT_OPEN_FILES_TWICE
71 if (info->s->kfile >= 0 && mysql_file_close(info->s->kfile, MYF(0)))
72 error = my_errno;
73 if (info->dfile >= 0 && mysql_file_close(info->dfile, MYF(0)))
74 error = my_errno;
75 info->s->kfile=info->dfile= -1; /* Files aren't open anymore */
76 #endif
77 break;
78 case HA_PANIC_READ: /* Restore to before WRITE */
79 #ifdef CANT_OPEN_FILES_TWICE
80 { /* Open closed files */
81 char name_buff[FN_REFLEN];
82 if (info->s->kfile < 0)
83 if ((info->s->kfile= mysql_file_open(mi_key_file_kfile,
84 fn_format(name_buff,
85 info->filename, "",
86 N_NAME_IEXT, 4),
87 info->mode, MYF(MY_WME))) < 0)
88 error = my_errno;
89 if (info->dfile < 0)
90 {
91 if ((info->dfile= mysql_file_open(mi_key_file_dfile,
92 fn_format(name_buff,
93 info->filename, "",
94 N_NAME_DEXT, 4),
95 info->mode, MYF(MY_WME))) < 0)
96 error = my_errno;
97 info->rec_cache.file=info->dfile;
98 }
99 }
100 #endif
101 if (info->was_locked)
102 {
103 if (mi_lock_database(info, info->was_locked))
104 error=my_errno;
105 info->was_locked=0;
106 }
107 break;
108 }
109 }
110 if (flag == HA_PANIC_CLOSE)
111 {
112 (void) mi_log(0); /* Close log if neaded */
113 ft_free_stopwords();
114 }
115 mysql_mutex_unlock(&THR_LOCK_myisam);
116 if (!error)
117 DBUG_RETURN(0);
118 DBUG_RETURN(my_errno=error);
119 } /* mi_panic */
120