1 /*
2 * Test to see how quickly we can scan the inode table (not doing
3 * anything else)
4 */
5
6 #include "config.h"
7 #include <string.h>
8 #include <fcntl.h>
9 #include <ctype.h>
10 #include <termios.h>
11 #include <time.h>
12 #ifdef HAVE_GETOPT_H
13 #include <getopt.h>
14 #endif
15 #include <unistd.h>
16 #ifdef HAVE_ERRNO_H
17 #include <errno.h>
18 #endif
19 #include <sys/ioctl.h>
20 #ifdef HAVE_MALLOC_H
21 #include <malloc.h>
22 #endif
23 #include <sys/time.h>
24 #include <sys/resource.h>
25
26 #if EXT2_FLAT_INCLUDES
27 #include "ext2_fs.h"
28 #include "ext2fs.h"
29 #include "blkid.h"
30 #else
31 #include "ext2fs/ext2_fs.h"
32 #include "ext2fs/ext2fs.h"
33 #include "blkid/blkid.h"
34 #endif
35
36 #include "et/com_err.h"
37 #include "../version.h"
38
39 struct resource_track {
40 struct timeval time_start;
41 struct timeval user_start;
42 struct timeval system_start;
43 void *brk_start;
44 unsigned long long bytes_read;
45 unsigned long long bytes_written;
46 };
47
48 extern int isatty(int);
49
50 const char * program_name = "iscan";
51 const char * device_name = NULL;
52
53 int yflag = 0;
54 int nflag = 0;
55 int preen = 0;
56 int inode_buffer_blocks = 0;
57 int invalid_bitmaps = 0;
58
59 struct resource_track global_rtrack;
60
init_resource_track(struct resource_track * track,io_channel channel)61 void init_resource_track(struct resource_track *track, io_channel channel)
62 {
63 #ifdef HAVE_GETRUSAGE
64 struct rusage r;
65 #endif
66 io_stats io_start = 0;
67
68 track->brk_start = sbrk(0);
69 gettimeofday(&track->time_start, 0);
70 #ifdef HAVE_GETRUSAGE
71 #ifdef sun
72 memset(&r, 0, sizeof(struct rusage));
73 #endif
74 getrusage(RUSAGE_SELF, &r);
75 track->user_start = r.ru_utime;
76 track->system_start = r.ru_stime;
77 #else
78 track->user_start.tv_sec = track->user_start.tv_usec = 0;
79 track->system_start.tv_sec = track->system_start.tv_usec = 0;
80 #endif
81 track->bytes_read = 0;
82 track->bytes_written = 0;
83 if (channel && channel->manager && channel->manager->get_stats)
84 channel->manager->get_stats(channel, &io_start);
85 if (io_start) {
86 track->bytes_read = io_start->bytes_read;
87 track->bytes_written = io_start->bytes_written;
88 }
89 }
90
timeval_subtract(struct timeval * tv1,struct timeval * tv2)91 static float timeval_subtract(struct timeval *tv1,
92 struct timeval *tv2)
93 {
94 return ((tv1->tv_sec - tv2->tv_sec) +
95 ((float) (tv1->tv_usec - tv2->tv_usec)) / 1000000);
96 }
97
print_resource_track(const char * desc,struct resource_track * track,io_channel channel)98 void print_resource_track(const char *desc,
99 struct resource_track *track, io_channel channel)
100 {
101 #ifdef HAVE_GETRUSAGE
102 struct rusage r;
103 #endif
104 struct timeval time_end;
105
106 gettimeofday(&time_end, 0);
107
108 if (desc)
109 printf("%s: ", desc);
110
111 #define kbytes(x) (((unsigned long long)(x) + 1023) / 1024)
112 #ifdef HAVE_MALLINFO
113 /* don't use mallinfo() if over 2GB used, since it returns "int" */
114 if ((char *)sbrk(0) - (char *)track->brk_start < 2LL << 30) {
115 struct mallinfo malloc_info = mallinfo();
116
117 printf("Memory used: %lluk/%lluk (%lluk/%lluk), ",
118 kbytes(malloc_info.arena), kbytes(malloc_info.hblkhd),
119 kbytes(malloc_info.uordblks),
120 kbytes(malloc_info.fordblks));
121 } else
122 #endif
123 printf("Memory used: %lluk, ",
124 kbytes(((char *)sbrk(0)) - ((char *)track->brk_start)));
125
126 #ifdef HAVE_GETRUSAGE
127 getrusage(RUSAGE_SELF, &r);
128
129 printf("time: %5.2f/%5.2f/%5.2f\n",
130 timeval_subtract(&time_end, &track->time_start),
131 timeval_subtract(&r.ru_utime, &track->user_start),
132 timeval_subtract(&r.ru_stime, &track->system_start));
133 #else
134 printf("elapsed time: %6.3f\n",
135 timeval_subtract(&time_end, &track->time_start));
136 #endif
137 #define mbytes(x) (((x) + 1048575) / 1048576)
138 if (channel && channel->manager && channel->manager->get_stats) {
139 io_stats delta = 0;
140 unsigned long long bytes_read = 0;
141 unsigned long long bytes_written = 0;
142
143 if (desc)
144 printf("%s: ", desc);
145
146 channel->manager->get_stats(channel, &delta);
147 if (delta) {
148 bytes_read = delta->bytes_read - track->bytes_read;
149 bytes_written = delta->bytes_written -
150 track->bytes_written;
151 }
152 printf("I/O read: %lluMB, write: %lluMB, "
153 "rate: %.2fMB/s\n",
154 mbytes(bytes_read), mbytes(bytes_written),
155 (double)mbytes(bytes_read + bytes_written) /
156 timeval_subtract(&time_end, &track->time_start));
157 }
158 }
159
usage(void)160 static void usage(void)
161 {
162 fprintf(stderr,
163 "Usage: %s [-F] [-I inode_buffer_blocks] device\n",
164 program_name);
165 exit(1);
166 }
167
PRS(int argc,char * argv[])168 static void PRS(int argc, char *argv[])
169 {
170 int flush = 0;
171 int c;
172 #ifdef MTRACE
173 extern void *mallwatch;
174 #endif
175 errcode_t retval;
176
177 setbuf(stdout, NULL);
178 setbuf(stderr, NULL);
179 initialize_ext2_error_table();
180
181 if (argc && *argv)
182 program_name = *argv;
183 while ((c = getopt (argc, argv, "FI")) != EOF)
184 switch (c) {
185 case 'F':
186 flush = 1;
187 break;
188 case 'I':
189 inode_buffer_blocks = atoi(optarg);
190 break;
191 default:
192 usage ();
193 }
194 device_name = argv[optind];
195 if (flush) {
196 int fd = open(device_name, O_RDONLY, 0);
197
198 if (fd < 0) {
199 com_err("open", errno,
200 "while opening %s for flushing", device_name);
201 exit(1);
202 }
203 if ((retval = ext2fs_sync_device(fd, 1))) {
204 com_err("ext2fs_sync_device", retval,
205 "while trying to flush %s", device_name);
206 exit(1);
207 }
208 close(fd);
209 }
210 }
211
main(int argc,char * argv[])212 int main (int argc, char *argv[])
213 {
214 errcode_t retval = 0;
215 int exit_value = 0;
216 ext2_filsys fs;
217 ext2_ino_t ino;
218 __u32 num_inodes = 0;
219 struct ext2_inode inode;
220 ext2_inode_scan scan;
221
222 PRS(argc, argv);
223
224 retval = ext2fs_open(device_name, 0,
225 0, 0, unix_io_manager, &fs);
226 if (retval) {
227 com_err(program_name, retval, "while trying to open '%s'",
228 device_name);
229 exit(1);
230 }
231
232 init_resource_track(&global_rtrack, fs->io);
233
234 retval = ext2fs_open_inode_scan(fs, inode_buffer_blocks, &scan);
235 if (retval) {
236 com_err(program_name, retval, "while opening inode scan");
237 exit(1);
238 }
239
240 while (1) {
241 retval = ext2fs_get_next_inode(scan, &ino, &inode);
242 if (retval) {
243 com_err(program_name, retval,
244 "while getting next inode");
245 exit(1);
246 }
247 if (ino == 0)
248 break;
249 num_inodes++;
250 }
251
252 print_resource_track(NULL, &global_rtrack, fs->io);
253 printf("%u inodes scanned.\n", num_inodes);
254
255 exit(0);
256 }
257