1 /* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
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, version 2.0,
5 as published by the Free Software Foundation.
6
7 This program is also distributed with certain software (including
8 but not limited to OpenSSL) that is licensed under separate terms,
9 as designated in a particular file or component or in included license
10 documentation. The authors of MySQL hereby grant you an additional
11 permission to link the program and your derivative works with the
12 separately licensed software that they have included with MySQL.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License, version 2.0, for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
22
23 /*
24 Logging of MyISAM commands and records on logfile for debugging
25 The log can be examined with help of the myisamlog command.
26 */
27
28 #include "myisamdef.h"
29 #ifdef __WIN__
30 #include <fcntl.h>
31 #endif
32
33 #undef GETPID /* For HPUX */
34 #define GETPID() (log_type == 1 ? (long) myisam_pid : (long) my_thread_dbug_id())
35
36 /* Activate logging if flag is 1 and reset logging if flag is 0 */
37
38 static int log_type=0;
39 ulong myisam_pid=0;
40
mi_log(int activate_log)41 int mi_log(int activate_log)
42 {
43 int error=0;
44 char buff[FN_REFLEN];
45 DBUG_ENTER("mi_log");
46
47 log_type=activate_log;
48 if (activate_log)
49 {
50 if (!myisam_pid)
51 myisam_pid=(ulong) getpid();
52 if (myisam_log_file < 0)
53 {
54 if ((myisam_log_file= mysql_file_create(mi_key_file_log,
55 fn_format(buff,
56 myisam_log_filename,
57 "", ".log", 4),
58 0,
59 (O_RDWR | O_BINARY | O_APPEND),
60 MYF(0))) < 0)
61 DBUG_RETURN(my_errno);
62 }
63 }
64 else if (myisam_log_file >= 0)
65 {
66 error= mysql_file_close(myisam_log_file, MYF(0)) ? my_errno : 0 ;
67 myisam_log_file= -1;
68 }
69 DBUG_RETURN(error);
70 }
71
72
73 /* Logging of records and commands on logfile */
74 /* All logs starts with command(1) dfile(2) process(4) result(2) */
75
_myisam_log(enum myisam_log_commands command,MI_INFO * info,const uchar * buffert,uint length)76 void _myisam_log(enum myisam_log_commands command, MI_INFO *info,
77 const uchar *buffert, uint length)
78 {
79 uchar buff[11];
80 int error,old_errno;
81 ulong pid=(ulong) GETPID();
82 old_errno=my_errno;
83 memset(buff, 0, sizeof(buff));
84 buff[0]=(char) command;
85 mi_int2store(buff+1,info->dfile);
86 mi_int4store(buff+3,pid);
87 mi_int2store(buff+9,length);
88
89 mysql_mutex_lock(&THR_LOCK_myisam);
90 error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
91 (void) mysql_file_write(myisam_log_file, buff, sizeof(buff), MYF(0));
92 (void) mysql_file_write(myisam_log_file, buffert, length, MYF(0));
93 if (!error)
94 error=my_lock(myisam_log_file,F_UNLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
95 mysql_mutex_unlock(&THR_LOCK_myisam);
96 my_errno=old_errno;
97 }
98
99
_myisam_log_command(enum myisam_log_commands command,MI_INFO * info,const uchar * buffert,uint length,int result)100 void _myisam_log_command(enum myisam_log_commands command, MI_INFO *info,
101 const uchar *buffert, uint length, int result)
102 {
103 uchar buff[9];
104 int error,old_errno;
105 ulong pid=(ulong) GETPID();
106
107 old_errno=my_errno;
108 buff[0]=(char) command;
109 mi_int2store(buff+1,info->dfile);
110 mi_int4store(buff+3,pid);
111 mi_int2store(buff+7,result);
112 mysql_mutex_lock(&THR_LOCK_myisam);
113 error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
114 (void) mysql_file_write(myisam_log_file, buff, sizeof(buff), MYF(0));
115 if (buffert)
116 (void) mysql_file_write(myisam_log_file, buffert, length, MYF(0));
117 if (!error)
118 error=my_lock(myisam_log_file,F_UNLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
119 mysql_mutex_unlock(&THR_LOCK_myisam);
120 my_errno=old_errno;
121 }
122
123
_myisam_log_record(enum myisam_log_commands command,MI_INFO * info,const uchar * record,my_off_t filepos,int result)124 void _myisam_log_record(enum myisam_log_commands command, MI_INFO *info,
125 const uchar *record, my_off_t filepos, int result)
126 {
127 uchar buff[21],*pos;
128 int error,old_errno;
129 uint length;
130 ulong pid=(ulong) GETPID();
131
132 old_errno=my_errno;
133 if (!info->s->base.blobs)
134 length=info->s->base.reclength;
135 else
136 length=info->s->base.reclength+ _my_calc_total_blob_length(info,record);
137 buff[0]=(uchar) command;
138 mi_int2store(buff+1,info->dfile);
139 mi_int4store(buff+3,pid);
140 mi_int2store(buff+7,result);
141 mi_sizestore(buff+9,filepos);
142 mi_int4store(buff+17,length);
143 mysql_mutex_lock(&THR_LOCK_myisam);
144 error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
145 (void) mysql_file_write(myisam_log_file, buff, sizeof(buff), MYF(0));
146 (void) mysql_file_write(myisam_log_file, record, info->s->base.reclength, MYF(0));
147 if (info->s->base.blobs)
148 {
149 MI_BLOB *blob,*end;
150
151 for (end=info->blobs+info->s->base.blobs, blob= info->blobs;
152 blob != end ;
153 blob++)
154 {
155 memcpy(&pos, record+blob->offset+blob->pack_length,
156 sizeof(char*));
157 (void) mysql_file_write(myisam_log_file, pos, blob->length, MYF(0));
158 }
159 }
160 if (!error)
161 error=my_lock(myisam_log_file,F_UNLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
162 mysql_mutex_unlock(&THR_LOCK_myisam);
163 my_errno=old_errno;
164 }
165