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, version 2.0,
6 as published by the Free Software Foundation.
7
8 This program is also distributed with certain software (including
9 but not limited to OpenSSL) that is licensed under separate terms,
10 as designated in a particular file or component or in included license
11 documentation. The authors of MySQL hereby grant you an additional
12 permission to link the program and your derivative works with the
13 separately licensed software that they have included with MySQL.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License, version 2.0, for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
23
24 #include "fulltext.h"
25
26 /* if flag == HA_PANIC_CLOSE then all misam files are closed */
27 /* if flag == HA_PANIC_WRITE then all misam files are unlocked and
28 all changed data in single user misam is written to file */
29 /* if flag == HA_PANIC_READ then all misam files that was locked when
30 mi_panic(HA_PANIC_WRITE) was done is locked. A mi_readinfo() is
31 done for all single user files to get changes in database */
32
33
mi_panic(enum ha_panic_function flag)34 int mi_panic(enum ha_panic_function flag)
35 {
36 int error=0;
37 LIST *list_element,*next_open;
38 MI_INFO *info;
39 DBUG_ENTER("mi_panic");
40
41 mysql_mutex_lock(&THR_LOCK_myisam);
42 for (list_element=myisam_open_list ; list_element ; list_element=next_open)
43 {
44 next_open=list_element->next; /* Save if close */
45 info=(MI_INFO*) list_element->data;
46 switch (flag) {
47 case HA_PANIC_CLOSE:
48 mysql_mutex_unlock(&THR_LOCK_myisam); /* Not exactly right... */
49 if (mi_close(info))
50 error=my_errno;
51 mysql_mutex_lock(&THR_LOCK_myisam);
52 break;
53 case HA_PANIC_WRITE: /* Do this to free databases */
54 #ifdef CANT_OPEN_FILES_TWICE
55 if (info->s->options & HA_OPTION_READ_ONLY_DATA)
56 break;
57 #endif
58 if (flush_key_blocks(info->s->key_cache, info->s->kfile, FLUSH_RELEASE))
59 error=my_errno;
60 if (info->opt_flag & WRITE_CACHE_USED)
61 if (flush_io_cache(&info->rec_cache))
62 error=my_errno;
63 if (info->opt_flag & READ_CACHE_USED)
64 {
65 if (flush_io_cache(&info->rec_cache))
66 error=my_errno;
67 reinit_io_cache(&info->rec_cache,READ_CACHE,0,
68 (pbool) (info->lock_type != F_UNLCK),1);
69 }
70 if (info->lock_type != F_UNLCK && ! info->was_locked)
71 {
72 info->was_locked=info->lock_type;
73 if (mi_lock_database(info,F_UNLCK))
74 error=my_errno;
75 }
76 #ifdef CANT_OPEN_FILES_TWICE
77 if (info->s->kfile >= 0 && mysql_file_close(info->s->kfile, MYF(0)))
78 error = my_errno;
79 if (info->dfile >= 0 && mysql_file_close(info->dfile, MYF(0)))
80 error = my_errno;
81 info->s->kfile=info->dfile= -1; /* Files aren't open anymore */
82 break;
83 #endif
84 // fallthrough
85 case HA_PANIC_READ: /* Restore to before WRITE */
86 #ifdef CANT_OPEN_FILES_TWICE
87 { /* Open closed files */
88 char name_buff[FN_REFLEN];
89 if (info->s->kfile < 0)
90 if ((info->s->kfile= mysql_file_open(mi_key_file_kfile,
91 fn_format(name_buff,
92 info->filename, "",
93 N_NAME_IEXT, 4),
94 info->mode, MYF(MY_WME))) < 0)
95 error = my_errno;
96 if (info->dfile < 0)
97 {
98 if ((info->dfile= mysql_file_open(mi_key_file_dfile,
99 fn_format(name_buff,
100 info->filename, "",
101 N_NAME_DEXT, 4),
102 info->mode, MYF(MY_WME))) < 0)
103 error = my_errno;
104 info->rec_cache.file=info->dfile;
105 }
106 }
107 #endif
108 if (info->was_locked)
109 {
110 if (mi_lock_database(info, info->was_locked))
111 error=my_errno;
112 info->was_locked=0;
113 }
114 break;
115 }
116 }
117 if (flag == HA_PANIC_CLOSE)
118 {
119 (void) mi_log(0); /* Close log if neaded */
120 ft_free_stopwords();
121 }
122 mysql_mutex_unlock(&THR_LOCK_myisam);
123 if (!error)
124 DBUG_RETURN(0);
125 DBUG_RETURN(my_errno=error);
126 } /* mi_panic */
127