522c9178ee26742ac6a227f76e633eac200bf3e9
[xfstests-dev.git] / src / loggen.c
1 /*
2  * Copyright (c) 2000-2003 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  
19 /*
20  *
21  * loggen: Generate log entries. Very much incomplete. The empty log
22  *         record is a bit of a misnomer since we need to jump through
23  *         hoops to get a log record that parses ok yet does nothing.
24  *
25  *                                                  - dxm 29/09/00
26  */
27
28 #include <xfs/libxfs.h>
29 #include <xfs/xfs_log.h>
30 #include <xfs/xfs_log_priv.h>
31
32 #ifndef ASSIGN_ANY_LSN_DISK
33 #define ASSIGN_ANY_LSN_DISK(lsn,cycle,block)  \
34     { \
35         INT_SET(((uint *)&(lsn))[0], ARCH_CONVERT, (cycle)); \
36         INT_SET(((uint *)&(lsn))[1], ARCH_CONVERT, (block)); \
37     }
38 #endif
39
40 void
41 usage(void)
42 {
43     fprintf(stderr,"Usage: loggen\n"
44                    "           set up parameters before writing record(s):\n"
45                    "               -f f     - set format\n"
46                    "               -u u     - set uuid\n"
47                    "               -c c     - set cycle\n"
48                    "               -b b     - set block\n"
49                    "               -C c     - set tail cycle\n"
50                    "               -B b     - set tail block\n"
51                    "           write log record(s):\n"
52                    "               -z n     - write n zero block(s)     (1BB)\n"
53                    "               -e n     - write n empty record(s)   (2BB)\n"
54                    "               -m n     - write n unmount record(s) (2BB)\n"
55                    "\n"
56                    "            redirect stdout to external log partition, or pipe to\n"
57                    "            dd with appropriate parameters to stuff into internal log.\n"
58     );
59     exit(1);
60 }
61
62 int         bufblocks            = 0;
63 void        *buf                 = NULL;
64 int         param_cycle          = 1;
65 int         param_block          = 0;
66 int         param_tail_cycle     = 1;
67 int         param_tail_block     = 0;
68 int         param_fmt            = XLOG_FMT;
69 uuid_t      param_uuid           = {0};
70
71 void
72 loggen_alloc(int blocks)
73 {
74     if (!(buf=realloc(buf, blocks*BBSIZE))) {
75         fprintf(stderr,"failed to allocate %d block(s)\n", blocks);
76         exit(1);
77     }
78     memset(buf, 0, blocks*BBSIZE);
79     bufblocks=blocks;
80 }
81
82 void
83 loggen_write(void)
84 {         
85     if (!buf) {
86         fprintf(stderr,"no buffer allocated\n");
87         exit(1);
88     }
89
90     if (fwrite(buf, BBSIZE, bufblocks, stdout) != bufblocks) {
91         perror("fwrite");
92         exit(1);
93     }
94
95 }
96
97 void
98 loggen_zero(int count)
99 {
100     if (!count) count=1;
101     
102     fprintf(stderr,"   *** zero block (1BB) x %d\n", count);
103     loggen_alloc(1);
104     while (count--)
105         loggen_write();
106 }      
107       
108 void
109 loggen_unmount(int count)
110 {
111     xlog_rec_header_t       *head;
112     xlog_op_header_t        *op;
113     /* the data section must be 32 bit size aligned */
114     struct {
115         __uint16_t magic;
116         __uint16_t pad1;
117         __uint32_t pad2; /* may as well make it 64 bits */
118     } magic = { XLOG_UNMOUNT_TYPE, 0, 0 };
119     
120     if (!count) count=1;
121     
122     fprintf(stderr,"   *** unmount record (2BB) x %d\n", count);
123     loggen_alloc(2);
124     
125     head = (xlog_rec_header_t *)buf;
126     op   = (xlog_op_header_t  *)(((char*)buf)+BBSIZE);
127
128     /* note that oh_tid actually contains the cycle number
129      * and the tid is stored in h_cycle_data[0] - that's the
130      * way things end up on disk.
131      */
132
133     head->h_magicno = cpu_to_be32(XLOG_HEADER_MAGIC_NUM);
134     head->h_cycle = cpu_to_be32(param_cycle);
135     head->h_version = cpu_to_be32(1);
136     head->h_len = cpu_to_be32(20);
137     head->h_prev_block = cpu_to_be32(-1);
138     head->h_num_logops = cpu_to_be32(1);
139     head->h_cycle_data[0] = cpu_to_be32(0xb0c0d0d0);
140     head->h_fmt = cpu_to_be32(param_fmt);
141
142     head->h_tail_lsn = cpu_to_be64(xlog_assign_lsn(param_tail_cycle,
143                                                         param_tail_block));
144
145     memcpy(head->h_fs_uuid,  param_uuid, sizeof(uuid_t));
146
147     /* now a log unmount op */
148     op->oh_tid = cpu_to_be32(param_cycle);
149     op->oh_len = cpu_to_be32(sizeof(magic));
150     op->oh_clientid = XFS_LOG;
151     op->oh_flags = XLOG_UNMOUNT_TRANS;
152     op->oh_res2 = cpu_to_be16(0);
153
154     /* and the data for this op */
155
156     memcpy(op+1, &magic, sizeof(magic));
157     
158     while (count--) {
159         head->h_lsn = cpu_to_be64(xlog_assign_lsn(param_cycle, param_block++));
160         
161         loggen_write();
162     }
163
164   
165 void
166 loggen_empty(int count)
167 {
168     xlog_rec_header_t       *head;
169     xlog_op_header_t        *op1, *op2, *op3, *op4, *op5;
170     xfs_trans_header_t      *trans;
171     xfs_buf_log_format_t    blfs;
172     xfs_buf_log_format_t    *blf;
173     int                     *data;
174     char                    *p;
175     
176     if (!count) count=1;
177     
178     fprintf(stderr,"   *** empty record (2BB) x %d\n", count);
179     loggen_alloc(2);
180     
181     p=(char*)buf;
182     head  = (xlog_rec_header_t   *)p;         p+=BBSIZE;
183     op1   = (xlog_op_header_t    *)p;         p+=sizeof(xlog_op_header_t);
184     op2   = (xlog_op_header_t    *)p;         p+=sizeof(xlog_op_header_t);
185     trans = (xfs_trans_header_t  *)p;         p+=sizeof(xfs_trans_header_t);
186     op3   = (xlog_op_header_t    *)p;         p+=sizeof(xlog_op_header_t);
187     blf   = (xfs_buf_log_format_t*)p;         p+=sizeof(xfs_buf_log_format_t);
188     op4   = (xlog_op_header_t    *)p;         p+=sizeof(xlog_op_header_t);
189     data  = (int                 *)p;         p+=sizeof(int);
190     op5   = (xlog_op_header_t    *)p;         p+=sizeof(xlog_op_header_t);
191
192     /* note that oh_tid actually contains the cycle number
193      * and the tid is stored in h_cycle_data[0] - that's the
194      * way things end up on disk.
195      */
196
197     head->h_magicno        = cpu_to_be32(XLOG_HEADER_MAGIC_NUM);
198     head->h_cycle          = cpu_to_be32(param_cycle);
199     head->h_version        = cpu_to_be32(1);
200     head->h_len            = cpu_to_be32(5*sizeof(xlog_op_header_t) +
201                                                     sizeof(xfs_trans_header_t)+
202                                                     sizeof(xfs_buf_log_format_t)+
203                                                     sizeof(int));
204     head->h_prev_block     = cpu_to_be32(-1);
205     head->h_num_logops     = cpu_to_be32(5);
206     head->h_cycle_data[0]  = cpu_to_be32(0xb0c0d0d0);
207     head->h_fmt            = cpu_to_be32(param_fmt);
208     
209     head->h_tail_lsn = cpu_to_be64(xlog_assign_lsn(param_tail_cycle,
210                                                         param_tail_block));
211
212     memcpy(head->h_fs_uuid, param_uuid, sizeof(uuid_t));
213
214     /* start */
215     op1->oh_tid            = cpu_to_be32(1);
216     op1->oh_len            = cpu_to_be32(0);
217     op1->oh_clientid       = XFS_TRANSACTION;
218     op1->oh_flags          = XLOG_START_TRANS;
219     op1->oh_res2           = cpu_to_be16(0);
220     /* dummy */
221     op2->oh_tid            = cpu_to_be32(0xb0c0d0d0);
222     op2->oh_len            = cpu_to_be32(sizeof(xfs_trans_header_t));
223     op2->oh_clientid       = XFS_TRANSACTION;
224     op2->oh_flags          = 0;
225     op2->oh_res2           = cpu_to_be16(0);
226     /* dummy transaction - this stuff doesn't get endian converted */
227     trans->th_magic     = XFS_TRANS_MAGIC;
228     trans->th_type      = XFS_TRANS_DUMMY1;
229     trans->th_tid       = 0;
230     trans->th_num_items = 1;
231     /* buffer */
232     op3->oh_tid            = cpu_to_be32(0xb0c0d0d0);
233     op3->oh_len            = cpu_to_be32(sizeof(xfs_buf_log_format_t));
234     op3->oh_clientid       = XFS_TRANSACTION;
235     op3->oh_flags          = 0;
236     op3->oh_res2           = cpu_to_be16(0);
237     /* an empty buffer too */
238     blfs.blf_type       = XFS_LI_BUF;
239     blfs.blf_size       = 2;
240 #ifdef XFS_BLF_CANCEL
241     blfs.blf_flags      = XFS_BLF_CANCEL;
242 #else
243     blfs.blf_flags      = XFS_BLI_CANCEL;
244 #endif
245     blfs.blf_len        = 0;
246     blfs.blf_blkno      = 1;
247     blfs.blf_map_size   = 1;
248     blfs.blf_data_map[0]= 0;
249     memcpy(blf, &blfs, sizeof(blfs));
250     /* commit */
251     op4->oh_tid            = cpu_to_be32(0xb0c0d0d0);
252     op4->oh_len            = cpu_to_be32(sizeof(int));
253     op4->oh_clientid       = XFS_TRANSACTION;
254     op4->oh_flags          = 0;
255     op4->oh_res2           = cpu_to_be16(0);
256     /* and the data */
257     *data=*(int*)(char*)"FISH"; /* this won't get written (I hope) */
258     /* commit */
259     op5->oh_tid            = cpu_to_be32(0xb0c0d0d0);
260     op5->oh_len            = cpu_to_be32(0);
261     op5->oh_clientid       = XFS_TRANSACTION;
262     op5->oh_flags          = XLOG_COMMIT_TRANS;
263     op5->oh_res2           = cpu_to_be16(0);
264
265     while (count--) {
266         head->h_lsn = cpu_to_be64(xlog_assign_lsn(param_cycle, param_block++));
267         
268         loggen_write();
269     }
270 }   
271
272 int
273 main(int argc, char *argv[])
274 {
275     int c;
276     
277     fprintf(stderr,"*** loggen\n");
278     
279     if (argc<2) usage();
280     
281     while ((c = getopt(argc, argv, "f:u:c:b:C:B:z:e:m:")) != -1) {
282         switch (c) {
283             case 'f':
284                 param_fmt=atoi(optarg);
285                 break;
286             case 'u':
287                 memset(param_uuid, atoi(optarg), sizeof(param_uuid));
288                 break;
289             case 'c':
290                 param_cycle=atoi(optarg);
291                 break;
292             case 'b':
293                 param_block=atoi(optarg);
294                 break;
295             case 'C':
296                 param_tail_cycle=atoi(optarg);
297                 break;
298             case 'B':
299                 param_tail_block=atoi(optarg);
300                 break;
301                 
302             case 'z':
303                 loggen_zero(atoi(optarg));
304                 break;
305             case 'e':
306                 loggen_empty(atoi(optarg));
307                 break;
308             case 'm':
309                 loggen_unmount(atoi(optarg));
310                 break;
311                 
312             default:
313                 fprintf(stderr, "unknown option\n");
314                 usage();
315         }
316     }
317     return 0;   
318 }