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-rw-r--r--tools/perf/util/debugfs.c141
1 files changed, 0 insertions, 141 deletions
diff --git a/tools/perf/util/debugfs.c b/tools/perf/util/debugfs.c
index ffc35e748e8..dd8b19319c0 100644
--- a/tools/perf/util/debugfs.c
+++ b/tools/perf/util/debugfs.c
@@ -15,32 +15,6 @@ static const char *debugfs_known_mountpoints[] = {
15 0, 15 0,
16}; 16};
17 17
18/* use this to force a umount */
19void debugfs_force_cleanup(void)
20{
21 debugfs_find_mountpoint();
22 debugfs_premounted = 0;
23 debugfs_umount();
24}
25
26/* construct a full path to a debugfs element */
27int debugfs_make_path(const char *element, char *buffer, int size)
28{
29 int len;
30
31 if (strlen(debugfs_mountpoint) == 0) {
32 buffer[0] = '\0';
33 return -1;
34 }
35
36 len = strlen(debugfs_mountpoint) + strlen(element) + 1;
37 if (len >= size)
38 return len+1;
39
40 snprintf(buffer, size-1, "%s/%s", debugfs_mountpoint, element);
41 return 0;
42}
43
44static int debugfs_found; 18static int debugfs_found;
45 19
46/* find the path to the mounted debugfs */ 20/* find the path to the mounted debugfs */
@@ -97,17 +71,6 @@ int debugfs_valid_mountpoint(const char *debugfs)
97 return 0; 71 return 0;
98} 72}
99 73
100
101int debugfs_valid_entry(const char *path)
102{
103 struct stat st;
104
105 if (stat(path, &st))
106 return -errno;
107
108 return 0;
109}
110
111static void debugfs_set_tracing_events_path(const char *mountpoint) 74static void debugfs_set_tracing_events_path(const char *mountpoint)
112{ 75{
113 snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s", 76 snprintf(tracing_events_path, sizeof(tracing_events_path), "%s/%s",
@@ -149,107 +112,3 @@ void debugfs_set_path(const char *mountpoint)
149 snprintf(debugfs_mountpoint, sizeof(debugfs_mountpoint), "%s", mountpoint); 112 snprintf(debugfs_mountpoint, sizeof(debugfs_mountpoint), "%s", mountpoint);
150 debugfs_set_tracing_events_path(mountpoint); 113 debugfs_set_tracing_events_path(mountpoint);
151} 114}
152
153/* umount the debugfs */
154
155int debugfs_umount(void)
156{
157 char umountcmd[128];
158 int ret;
159
160 /* if it was already mounted, leave it */
161 if (debugfs_premounted)
162 return 0;
163
164 /* make sure it's a valid mount point */
165 ret = debugfs_valid_mountpoint(debugfs_mountpoint);
166 if (ret)
167 return ret;
168
169 snprintf(umountcmd, sizeof(umountcmd),
170 "/bin/umount %s", debugfs_mountpoint);
171 return system(umountcmd);
172}
173
174int debugfs_write(const char *entry, const char *value)
175{
176 char path[PATH_MAX + 1];
177 int ret, count;
178 int fd;
179
180 /* construct the path */
181 snprintf(path, sizeof(path), "%s/%s", debugfs_mountpoint, entry);
182
183 /* verify that it exists */
184 ret = debugfs_valid_entry(path);
185 if (ret)
186 return ret;
187
188 /* get how many chars we're going to write */
189 count = strlen(value);
190
191 /* open the debugfs entry */
192 fd = open(path, O_RDWR);
193 if (fd < 0)
194 return -errno;
195
196 while (count > 0) {
197 /* write it */
198 ret = write(fd, value, count);
199 if (ret <= 0) {
200 if (ret == EAGAIN)
201 continue;
202 close(fd);
203 return -errno;
204 }
205 count -= ret;
206 }
207
208 /* close it */
209 close(fd);
210
211 /* return success */
212 return 0;
213}
214
215/*
216 * read a debugfs entry
217 * returns the number of chars read or a negative errno
218 */
219int debugfs_read(const char *entry, char *buffer, size_t size)
220{
221 char path[PATH_MAX + 1];
222 int ret;
223 int fd;
224
225 /* construct the path */
226 snprintf(path, sizeof(path), "%s/%s", debugfs_mountpoint, entry);
227
228 /* verify that it exists */
229 ret = debugfs_valid_entry(path);
230 if (ret)
231 return ret;
232
233 /* open the debugfs entry */
234 fd = open(path, O_RDONLY);
235 if (fd < 0)
236 return -errno;
237
238 do {
239 /* read it */
240 ret = read(fd, buffer, size);
241 if (ret == 0) {
242 close(fd);
243 return EOF;
244 }
245 } while (ret < 0 && errno == EAGAIN);
246
247 /* close it */
248 close(fd);
249
250 /* make *sure* there's a null character at the end */
251 buffer[ret] = '\0';
252
253 /* return the number of chars read */
254 return ret;
255}