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1da177e4 LT |
1 | /* |
2 | * linux/fs/proc/proc_misc.c | |
3 | * | |
4 | * linux/fs/proc/array.c | |
5 | * Copyright (C) 1992 by Linus Torvalds | |
6 | * based on ideas by Darren Senn | |
7 | * | |
8 | * This used to be the part of array.c. See the rest of history and credits | |
9 | * there. I took this into a separate file and switched the thing to generic | |
10 | * proc_file_inode_operations, leaving in array.c only per-process stuff. | |
11 | * Inumbers allocation made dynamic (via create_proc_entry()). AV, May 1999. | |
12 | * | |
13 | * Changes: | |
14 | * Fulton Green : Encapsulated position metric calculations. | |
15 | * <kernel@FultonGreen.com> | |
16 | */ | |
17 | ||
18 | #include <linux/types.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/time.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/kernel_stat.h> | |
7170be5f | 23 | #include <linux/fs.h> |
1da177e4 LT |
24 | #include <linux/tty.h> |
25 | #include <linux/string.h> | |
26 | #include <linux/mman.h> | |
27 | #include <linux/proc_fs.h> | |
28 | #include <linux/ioport.h> | |
29 | #include <linux/config.h> | |
30 | #include <linux/mm.h> | |
31 | #include <linux/mmzone.h> | |
32 | #include <linux/pagemap.h> | |
33 | #include <linux/swap.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/smp.h> | |
36 | #include <linux/signal.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/smp_lock.h> | |
40 | #include <linux/seq_file.h> | |
41 | #include <linux/times.h> | |
42 | #include <linux/profile.h> | |
43 | #include <linux/blkdev.h> | |
44 | #include <linux/hugetlb.h> | |
45 | #include <linux/jiffies.h> | |
46 | #include <linux/sysrq.h> | |
47 | #include <linux/vmalloc.h> | |
666bfddb | 48 | #include <linux/crash_dump.h> |
1da177e4 LT |
49 | #include <asm/uaccess.h> |
50 | #include <asm/pgtable.h> | |
51 | #include <asm/io.h> | |
52 | #include <asm/tlb.h> | |
53 | #include <asm/div64.h> | |
54 | #include "internal.h" | |
55 | ||
56 | #define LOAD_INT(x) ((x) >> FSHIFT) | |
57 | #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) | |
58 | /* | |
59 | * Warning: stuff below (imported functions) assumes that its output will fit | |
60 | * into one page. For some of those functions it may be wrong. Moreover, we | |
61 | * have a way to deal with that gracefully. Right now I used straightforward | |
62 | * wrappers, but this needs further analysis wrt potential overflows. | |
63 | */ | |
64 | extern int get_hardware_list(char *); | |
65 | extern int get_stram_list(char *); | |
1da177e4 LT |
66 | extern int get_filesystem_list(char *); |
67 | extern int get_exec_domain_list(char *); | |
68 | extern int get_dma_list(char *); | |
69 | extern int get_locks_status (char *, char **, off_t, int); | |
70 | ||
71 | static int proc_calc_metrics(char *page, char **start, off_t off, | |
72 | int count, int *eof, int len) | |
73 | { | |
74 | if (len <= off+count) *eof = 1; | |
75 | *start = page + off; | |
76 | len -= off; | |
77 | if (len>count) len = count; | |
78 | if (len<0) len = 0; | |
79 | return len; | |
80 | } | |
81 | ||
82 | static int loadavg_read_proc(char *page, char **start, off_t off, | |
83 | int count, int *eof, void *data) | |
84 | { | |
85 | int a, b, c; | |
86 | int len; | |
87 | ||
88 | a = avenrun[0] + (FIXED_1/200); | |
89 | b = avenrun[1] + (FIXED_1/200); | |
90 | c = avenrun[2] + (FIXED_1/200); | |
91 | len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n", | |
92 | LOAD_INT(a), LOAD_FRAC(a), | |
93 | LOAD_INT(b), LOAD_FRAC(b), | |
94 | LOAD_INT(c), LOAD_FRAC(c), | |
95 | nr_running(), nr_threads, last_pid); | |
96 | return proc_calc_metrics(page, start, off, count, eof, len); | |
97 | } | |
98 | ||
99 | static int uptime_read_proc(char *page, char **start, off_t off, | |
100 | int count, int *eof, void *data) | |
101 | { | |
102 | struct timespec uptime; | |
103 | struct timespec idle; | |
104 | int len; | |
105 | cputime_t idletime = cputime_add(init_task.utime, init_task.stime); | |
106 | ||
107 | do_posix_clock_monotonic_gettime(&uptime); | |
108 | cputime_to_timespec(idletime, &idle); | |
109 | len = sprintf(page,"%lu.%02lu %lu.%02lu\n", | |
110 | (unsigned long) uptime.tv_sec, | |
111 | (uptime.tv_nsec / (NSEC_PER_SEC / 100)), | |
112 | (unsigned long) idle.tv_sec, | |
113 | (idle.tv_nsec / (NSEC_PER_SEC / 100))); | |
114 | ||
115 | return proc_calc_metrics(page, start, off, count, eof, len); | |
116 | } | |
117 | ||
118 | static int meminfo_read_proc(char *page, char **start, off_t off, | |
119 | int count, int *eof, void *data) | |
120 | { | |
121 | struct sysinfo i; | |
122 | int len; | |
1da177e4 LT |
123 | unsigned long inactive; |
124 | unsigned long active; | |
125 | unsigned long free; | |
126 | unsigned long committed; | |
127 | unsigned long allowed; | |
128 | struct vmalloc_info vmi; | |
4c4c402d | 129 | long cached; |
1da177e4 | 130 | |
1da177e4 LT |
131 | get_zone_counts(&active, &inactive, &free); |
132 | ||
133 | /* | |
134 | * display in kilobytes. | |
135 | */ | |
136 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
137 | si_meminfo(&i); | |
138 | si_swapinfo(&i); | |
139 | committed = atomic_read(&vm_committed_space); | |
140 | allowed = ((totalram_pages - hugetlb_total_pages()) | |
141 | * sysctl_overcommit_ratio / 100) + total_swap_pages; | |
142 | ||
347ce434 CL |
143 | cached = global_page_state(NR_FILE_PAGES) - |
144 | total_swapcache_pages - i.bufferram; | |
4c4c402d MH |
145 | if (cached < 0) |
146 | cached = 0; | |
147 | ||
1da177e4 LT |
148 | get_vmalloc_info(&vmi); |
149 | ||
150 | /* | |
151 | * Tagged format, for easy grepping and expansion. | |
152 | */ | |
153 | len = sprintf(page, | |
154 | "MemTotal: %8lu kB\n" | |
155 | "MemFree: %8lu kB\n" | |
156 | "Buffers: %8lu kB\n" | |
157 | "Cached: %8lu kB\n" | |
158 | "SwapCached: %8lu kB\n" | |
159 | "Active: %8lu kB\n" | |
160 | "Inactive: %8lu kB\n" | |
161 | "HighTotal: %8lu kB\n" | |
162 | "HighFree: %8lu kB\n" | |
163 | "LowTotal: %8lu kB\n" | |
164 | "LowFree: %8lu kB\n" | |
165 | "SwapTotal: %8lu kB\n" | |
166 | "SwapFree: %8lu kB\n" | |
167 | "Dirty: %8lu kB\n" | |
168 | "Writeback: %8lu kB\n" | |
f3dbd344 | 169 | "AnonPages: %8lu kB\n" |
1da177e4 LT |
170 | "Mapped: %8lu kB\n" |
171 | "Slab: %8lu kB\n" | |
df849a15 | 172 | "PageTables: %8lu kB\n" |
fd39fc85 | 173 | "NFS Unstable: %8lu kB\n" |
d2c5e30c | 174 | "Bounce: %8lu kB\n" |
1da177e4 LT |
175 | "CommitLimit: %8lu kB\n" |
176 | "Committed_AS: %8lu kB\n" | |
1da177e4 LT |
177 | "VmallocTotal: %8lu kB\n" |
178 | "VmallocUsed: %8lu kB\n" | |
179 | "VmallocChunk: %8lu kB\n", | |
180 | K(i.totalram), | |
181 | K(i.freeram), | |
182 | K(i.bufferram), | |
4c4c402d | 183 | K(cached), |
1da177e4 LT |
184 | K(total_swapcache_pages), |
185 | K(active), | |
186 | K(inactive), | |
187 | K(i.totalhigh), | |
188 | K(i.freehigh), | |
189 | K(i.totalram-i.totalhigh), | |
190 | K(i.freeram-i.freehigh), | |
191 | K(i.totalswap), | |
192 | K(i.freeswap), | |
b1e7a8fd | 193 | K(global_page_state(NR_FILE_DIRTY)), |
ce866b34 | 194 | K(global_page_state(NR_WRITEBACK)), |
f3dbd344 | 195 | K(global_page_state(NR_ANON_PAGES)), |
65ba55f5 | 196 | K(global_page_state(NR_FILE_MAPPED)), |
9a865ffa | 197 | K(global_page_state(NR_SLAB)), |
df849a15 | 198 | K(global_page_state(NR_PAGETABLE)), |
fd39fc85 | 199 | K(global_page_state(NR_UNSTABLE_NFS)), |
d2c5e30c | 200 | K(global_page_state(NR_BOUNCE)), |
1da177e4 LT |
201 | K(allowed), |
202 | K(committed), | |
1da177e4 LT |
203 | (unsigned long)VMALLOC_TOTAL >> 10, |
204 | vmi.used >> 10, | |
205 | vmi.largest_chunk >> 10 | |
206 | ); | |
207 | ||
208 | len += hugetlb_report_meminfo(page + len); | |
209 | ||
210 | return proc_calc_metrics(page, start, off, count, eof, len); | |
211 | #undef K | |
212 | } | |
213 | ||
214 | extern struct seq_operations fragmentation_op; | |
215 | static int fragmentation_open(struct inode *inode, struct file *file) | |
216 | { | |
217 | (void)inode; | |
218 | return seq_open(file, &fragmentation_op); | |
219 | } | |
220 | ||
221 | static struct file_operations fragmentation_file_operations = { | |
222 | .open = fragmentation_open, | |
223 | .read = seq_read, | |
224 | .llseek = seq_lseek, | |
225 | .release = seq_release, | |
226 | }; | |
227 | ||
295ab934 ND |
228 | extern struct seq_operations zoneinfo_op; |
229 | static int zoneinfo_open(struct inode *inode, struct file *file) | |
230 | { | |
231 | return seq_open(file, &zoneinfo_op); | |
232 | } | |
233 | ||
234 | static struct file_operations proc_zoneinfo_file_operations = { | |
235 | .open = zoneinfo_open, | |
236 | .read = seq_read, | |
237 | .llseek = seq_lseek, | |
238 | .release = seq_release, | |
239 | }; | |
240 | ||
1da177e4 LT |
241 | static int version_read_proc(char *page, char **start, off_t off, |
242 | int count, int *eof, void *data) | |
243 | { | |
244 | int len; | |
245 | ||
246 | strcpy(page, linux_banner); | |
247 | len = strlen(page); | |
248 | return proc_calc_metrics(page, start, off, count, eof, len); | |
249 | } | |
250 | ||
251 | extern struct seq_operations cpuinfo_op; | |
252 | static int cpuinfo_open(struct inode *inode, struct file *file) | |
253 | { | |
254 | return seq_open(file, &cpuinfo_op); | |
255 | } | |
7170be5f | 256 | |
68eef3b4 JK |
257 | static struct file_operations proc_cpuinfo_operations = { |
258 | .open = cpuinfo_open, | |
259 | .read = seq_read, | |
260 | .llseek = seq_lseek, | |
261 | .release = seq_release, | |
7170be5f NH |
262 | }; |
263 | ||
68eef3b4 | 264 | static int devinfo_show(struct seq_file *f, void *v) |
7170be5f | 265 | { |
68eef3b4 JK |
266 | int i = *(loff_t *) v; |
267 | ||
268 | if (i < CHRDEV_MAJOR_HASH_SIZE) { | |
269 | if (i == 0) | |
270 | seq_printf(f, "Character devices:\n"); | |
271 | chrdev_show(f, i); | |
272 | } else { | |
273 | i -= CHRDEV_MAJOR_HASH_SIZE; | |
274 | if (i == 0) | |
275 | seq_printf(f, "\nBlock devices:\n"); | |
276 | blkdev_show(f, i); | |
7170be5f | 277 | } |
68eef3b4 | 278 | return 0; |
7170be5f NH |
279 | } |
280 | ||
68eef3b4 | 281 | static void *devinfo_start(struct seq_file *f, loff_t *pos) |
7170be5f | 282 | { |
68eef3b4 JK |
283 | if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE)) |
284 | return pos; | |
285 | return NULL; | |
7170be5f NH |
286 | } |
287 | ||
68eef3b4 | 288 | static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos) |
7170be5f | 289 | { |
68eef3b4 JK |
290 | (*pos)++; |
291 | if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE)) | |
292 | return NULL; | |
293 | return pos; | |
7170be5f NH |
294 | } |
295 | ||
68eef3b4 | 296 | static void devinfo_stop(struct seq_file *f, void *v) |
7170be5f | 297 | { |
68eef3b4 | 298 | /* Nothing to do */ |
7170be5f NH |
299 | } |
300 | ||
68eef3b4 JK |
301 | static struct seq_operations devinfo_ops = { |
302 | .start = devinfo_start, | |
303 | .next = devinfo_next, | |
304 | .stop = devinfo_stop, | |
305 | .show = devinfo_show | |
7170be5f NH |
306 | }; |
307 | ||
68eef3b4 | 308 | static int devinfo_open(struct inode *inode, struct file *filp) |
7170be5f | 309 | { |
68eef3b4 | 310 | return seq_open(filp, &devinfo_ops); |
7170be5f NH |
311 | } |
312 | ||
313 | static struct file_operations proc_devinfo_operations = { | |
314 | .open = devinfo_open, | |
315 | .read = seq_read, | |
316 | .llseek = seq_lseek, | |
317 | .release = seq_release, | |
318 | }; | |
319 | ||
1da177e4 LT |
320 | extern struct seq_operations vmstat_op; |
321 | static int vmstat_open(struct inode *inode, struct file *file) | |
322 | { | |
323 | return seq_open(file, &vmstat_op); | |
324 | } | |
325 | static struct file_operations proc_vmstat_file_operations = { | |
326 | .open = vmstat_open, | |
327 | .read = seq_read, | |
328 | .llseek = seq_lseek, | |
329 | .release = seq_release, | |
330 | }; | |
331 | ||
332 | #ifdef CONFIG_PROC_HARDWARE | |
333 | static int hardware_read_proc(char *page, char **start, off_t off, | |
334 | int count, int *eof, void *data) | |
335 | { | |
336 | int len = get_hardware_list(page); | |
337 | return proc_calc_metrics(page, start, off, count, eof, len); | |
338 | } | |
339 | #endif | |
340 | ||
341 | #ifdef CONFIG_STRAM_PROC | |
342 | static int stram_read_proc(char *page, char **start, off_t off, | |
343 | int count, int *eof, void *data) | |
344 | { | |
345 | int len = get_stram_list(page); | |
346 | return proc_calc_metrics(page, start, off, count, eof, len); | |
347 | } | |
348 | #endif | |
349 | ||
350 | extern struct seq_operations partitions_op; | |
351 | static int partitions_open(struct inode *inode, struct file *file) | |
352 | { | |
353 | return seq_open(file, &partitions_op); | |
354 | } | |
355 | static struct file_operations proc_partitions_operations = { | |
356 | .open = partitions_open, | |
357 | .read = seq_read, | |
358 | .llseek = seq_lseek, | |
359 | .release = seq_release, | |
360 | }; | |
361 | ||
362 | extern struct seq_operations diskstats_op; | |
363 | static int diskstats_open(struct inode *inode, struct file *file) | |
364 | { | |
365 | return seq_open(file, &diskstats_op); | |
366 | } | |
367 | static struct file_operations proc_diskstats_operations = { | |
368 | .open = diskstats_open, | |
369 | .read = seq_read, | |
370 | .llseek = seq_lseek, | |
371 | .release = seq_release, | |
372 | }; | |
373 | ||
374 | #ifdef CONFIG_MODULES | |
375 | extern struct seq_operations modules_op; | |
376 | static int modules_open(struct inode *inode, struct file *file) | |
377 | { | |
378 | return seq_open(file, &modules_op); | |
379 | } | |
380 | static struct file_operations proc_modules_operations = { | |
381 | .open = modules_open, | |
382 | .read = seq_read, | |
383 | .llseek = seq_lseek, | |
384 | .release = seq_release, | |
385 | }; | |
386 | #endif | |
387 | ||
10cef602 | 388 | #ifdef CONFIG_SLAB |
1da177e4 LT |
389 | extern struct seq_operations slabinfo_op; |
390 | extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *); | |
391 | static int slabinfo_open(struct inode *inode, struct file *file) | |
392 | { | |
393 | return seq_open(file, &slabinfo_op); | |
394 | } | |
395 | static struct file_operations proc_slabinfo_operations = { | |
396 | .open = slabinfo_open, | |
397 | .read = seq_read, | |
398 | .write = slabinfo_write, | |
399 | .llseek = seq_lseek, | |
400 | .release = seq_release, | |
401 | }; | |
871751e2 AV |
402 | |
403 | #ifdef CONFIG_DEBUG_SLAB_LEAK | |
404 | extern struct seq_operations slabstats_op; | |
405 | static int slabstats_open(struct inode *inode, struct file *file) | |
406 | { | |
407 | unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
408 | int ret = -ENOMEM; | |
409 | if (n) { | |
410 | ret = seq_open(file, &slabstats_op); | |
411 | if (!ret) { | |
412 | struct seq_file *m = file->private_data; | |
413 | *n = PAGE_SIZE / (2 * sizeof(unsigned long)); | |
414 | m->private = n; | |
415 | n = NULL; | |
416 | } | |
417 | kfree(n); | |
418 | } | |
419 | return ret; | |
420 | } | |
421 | ||
422 | static int slabstats_release(struct inode *inode, struct file *file) | |
423 | { | |
424 | struct seq_file *m = file->private_data; | |
425 | kfree(m->private); | |
426 | return seq_release(inode, file); | |
427 | } | |
428 | ||
429 | static struct file_operations proc_slabstats_operations = { | |
430 | .open = slabstats_open, | |
431 | .read = seq_read, | |
432 | .llseek = seq_lseek, | |
433 | .release = slabstats_release, | |
434 | }; | |
435 | #endif | |
10cef602 | 436 | #endif |
1da177e4 LT |
437 | |
438 | static int show_stat(struct seq_file *p, void *v) | |
439 | { | |
440 | int i; | |
441 | unsigned long jif; | |
442 | cputime64_t user, nice, system, idle, iowait, irq, softirq, steal; | |
443 | u64 sum = 0; | |
444 | ||
445 | user = nice = system = idle = iowait = | |
446 | irq = softirq = steal = cputime64_zero; | |
447 | jif = - wall_to_monotonic.tv_sec; | |
448 | if (wall_to_monotonic.tv_nsec) | |
449 | --jif; | |
450 | ||
0a945022 | 451 | for_each_possible_cpu(i) { |
1da177e4 LT |
452 | int j; |
453 | ||
454 | user = cputime64_add(user, kstat_cpu(i).cpustat.user); | |
455 | nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); | |
456 | system = cputime64_add(system, kstat_cpu(i).cpustat.system); | |
457 | idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); | |
458 | iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); | |
459 | irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); | |
460 | softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); | |
461 | steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); | |
462 | for (j = 0 ; j < NR_IRQS ; j++) | |
463 | sum += kstat_cpu(i).irqs[j]; | |
464 | } | |
465 | ||
466 | seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu\n", | |
467 | (unsigned long long)cputime64_to_clock_t(user), | |
468 | (unsigned long long)cputime64_to_clock_t(nice), | |
469 | (unsigned long long)cputime64_to_clock_t(system), | |
470 | (unsigned long long)cputime64_to_clock_t(idle), | |
471 | (unsigned long long)cputime64_to_clock_t(iowait), | |
472 | (unsigned long long)cputime64_to_clock_t(irq), | |
473 | (unsigned long long)cputime64_to_clock_t(softirq), | |
474 | (unsigned long long)cputime64_to_clock_t(steal)); | |
475 | for_each_online_cpu(i) { | |
476 | ||
477 | /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ | |
478 | user = kstat_cpu(i).cpustat.user; | |
479 | nice = kstat_cpu(i).cpustat.nice; | |
480 | system = kstat_cpu(i).cpustat.system; | |
481 | idle = kstat_cpu(i).cpustat.idle; | |
482 | iowait = kstat_cpu(i).cpustat.iowait; | |
483 | irq = kstat_cpu(i).cpustat.irq; | |
484 | softirq = kstat_cpu(i).cpustat.softirq; | |
485 | steal = kstat_cpu(i).cpustat.steal; | |
486 | seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n", | |
487 | i, | |
488 | (unsigned long long)cputime64_to_clock_t(user), | |
489 | (unsigned long long)cputime64_to_clock_t(nice), | |
490 | (unsigned long long)cputime64_to_clock_t(system), | |
491 | (unsigned long long)cputime64_to_clock_t(idle), | |
492 | (unsigned long long)cputime64_to_clock_t(iowait), | |
493 | (unsigned long long)cputime64_to_clock_t(irq), | |
494 | (unsigned long long)cputime64_to_clock_t(softirq), | |
495 | (unsigned long long)cputime64_to_clock_t(steal)); | |
496 | } | |
497 | seq_printf(p, "intr %llu", (unsigned long long)sum); | |
498 | ||
a1854611 | 499 | #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64) |
1da177e4 LT |
500 | for (i = 0; i < NR_IRQS; i++) |
501 | seq_printf(p, " %u", kstat_irqs(i)); | |
502 | #endif | |
503 | ||
504 | seq_printf(p, | |
505 | "\nctxt %llu\n" | |
506 | "btime %lu\n" | |
507 | "processes %lu\n" | |
508 | "procs_running %lu\n" | |
509 | "procs_blocked %lu\n", | |
510 | nr_context_switches(), | |
511 | (unsigned long)jif, | |
512 | total_forks, | |
513 | nr_running(), | |
514 | nr_iowait()); | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | static int stat_open(struct inode *inode, struct file *file) | |
520 | { | |
521 | unsigned size = 4096 * (1 + num_possible_cpus() / 32); | |
522 | char *buf; | |
523 | struct seq_file *m; | |
524 | int res; | |
525 | ||
526 | /* don't ask for more than the kmalloc() max size, currently 128 KB */ | |
527 | if (size > 128 * 1024) | |
528 | size = 128 * 1024; | |
529 | buf = kmalloc(size, GFP_KERNEL); | |
530 | if (!buf) | |
531 | return -ENOMEM; | |
532 | ||
533 | res = single_open(file, show_stat, NULL); | |
534 | if (!res) { | |
535 | m = file->private_data; | |
536 | m->buf = buf; | |
537 | m->size = size; | |
538 | } else | |
539 | kfree(buf); | |
540 | return res; | |
541 | } | |
542 | static struct file_operations proc_stat_operations = { | |
543 | .open = stat_open, | |
544 | .read = seq_read, | |
545 | .llseek = seq_lseek, | |
546 | .release = single_release, | |
547 | }; | |
548 | ||
1da177e4 LT |
549 | /* |
550 | * /proc/interrupts | |
551 | */ | |
552 | static void *int_seq_start(struct seq_file *f, loff_t *pos) | |
553 | { | |
554 | return (*pos <= NR_IRQS) ? pos : NULL; | |
555 | } | |
556 | ||
557 | static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos) | |
558 | { | |
559 | (*pos)++; | |
560 | if (*pos > NR_IRQS) | |
561 | return NULL; | |
562 | return pos; | |
563 | } | |
564 | ||
565 | static void int_seq_stop(struct seq_file *f, void *v) | |
566 | { | |
567 | /* Nothing to do */ | |
568 | } | |
569 | ||
570 | ||
571 | extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */ | |
572 | static struct seq_operations int_seq_ops = { | |
573 | .start = int_seq_start, | |
574 | .next = int_seq_next, | |
575 | .stop = int_seq_stop, | |
576 | .show = show_interrupts | |
577 | }; | |
578 | ||
579 | static int interrupts_open(struct inode *inode, struct file *filp) | |
580 | { | |
581 | return seq_open(filp, &int_seq_ops); | |
582 | } | |
583 | ||
584 | static struct file_operations proc_interrupts_operations = { | |
585 | .open = interrupts_open, | |
586 | .read = seq_read, | |
587 | .llseek = seq_lseek, | |
588 | .release = seq_release, | |
589 | }; | |
590 | ||
591 | static int filesystems_read_proc(char *page, char **start, off_t off, | |
592 | int count, int *eof, void *data) | |
593 | { | |
594 | int len = get_filesystem_list(page); | |
595 | return proc_calc_metrics(page, start, off, count, eof, len); | |
596 | } | |
597 | ||
598 | static int cmdline_read_proc(char *page, char **start, off_t off, | |
599 | int count, int *eof, void *data) | |
600 | { | |
601 | int len; | |
602 | ||
603 | len = sprintf(page, "%s\n", saved_command_line); | |
604 | return proc_calc_metrics(page, start, off, count, eof, len); | |
605 | } | |
606 | ||
607 | static int locks_read_proc(char *page, char **start, off_t off, | |
608 | int count, int *eof, void *data) | |
609 | { | |
610 | int len = get_locks_status(page, start, off, count); | |
611 | ||
612 | if (len < count) | |
613 | *eof = 1; | |
614 | return len; | |
615 | } | |
616 | ||
617 | static int execdomains_read_proc(char *page, char **start, off_t off, | |
618 | int count, int *eof, void *data) | |
619 | { | |
620 | int len = get_exec_domain_list(page); | |
621 | return proc_calc_metrics(page, start, off, count, eof, len); | |
622 | } | |
623 | ||
624 | #ifdef CONFIG_MAGIC_SYSRQ | |
625 | /* | |
626 | * writing 'C' to /proc/sysrq-trigger is like sysrq-C | |
627 | */ | |
628 | static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf, | |
629 | size_t count, loff_t *ppos) | |
630 | { | |
631 | if (count) { | |
632 | char c; | |
633 | ||
634 | if (get_user(c, buf)) | |
635 | return -EFAULT; | |
636 | __handle_sysrq(c, NULL, NULL, 0); | |
637 | } | |
638 | return count; | |
639 | } | |
640 | ||
641 | static struct file_operations proc_sysrq_trigger_operations = { | |
642 | .write = write_sysrq_trigger, | |
643 | }; | |
644 | #endif | |
645 | ||
646 | struct proc_dir_entry *proc_root_kcore; | |
647 | ||
99ac48f5 | 648 | void create_seq_entry(char *name, mode_t mode, const struct file_operations *f) |
1da177e4 LT |
649 | { |
650 | struct proc_dir_entry *entry; | |
651 | entry = create_proc_entry(name, mode, NULL); | |
652 | if (entry) | |
653 | entry->proc_fops = f; | |
654 | } | |
655 | ||
656 | void __init proc_misc_init(void) | |
657 | { | |
658 | struct proc_dir_entry *entry; | |
659 | static struct { | |
660 | char *name; | |
661 | int (*read_proc)(char*,char**,off_t,int,int*,void*); | |
662 | } *p, simple_ones[] = { | |
663 | {"loadavg", loadavg_read_proc}, | |
664 | {"uptime", uptime_read_proc}, | |
665 | {"meminfo", meminfo_read_proc}, | |
666 | {"version", version_read_proc}, | |
667 | #ifdef CONFIG_PROC_HARDWARE | |
668 | {"hardware", hardware_read_proc}, | |
669 | #endif | |
670 | #ifdef CONFIG_STRAM_PROC | |
671 | {"stram", stram_read_proc}, | |
672 | #endif | |
1da177e4 LT |
673 | {"filesystems", filesystems_read_proc}, |
674 | {"cmdline", cmdline_read_proc}, | |
675 | {"locks", locks_read_proc}, | |
676 | {"execdomains", execdomains_read_proc}, | |
677 | {NULL,} | |
678 | }; | |
679 | for (p = simple_ones; p->name; p++) | |
680 | create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL); | |
681 | ||
682 | proc_symlink("mounts", NULL, "self/mounts"); | |
683 | ||
684 | /* And now for trickier ones */ | |
685 | entry = create_proc_entry("kmsg", S_IRUSR, &proc_root); | |
686 | if (entry) | |
687 | entry->proc_fops = &proc_kmsg_operations; | |
7170be5f | 688 | create_seq_entry("devices", 0, &proc_devinfo_operations); |
1da177e4 LT |
689 | create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations); |
690 | create_seq_entry("partitions", 0, &proc_partitions_operations); | |
691 | create_seq_entry("stat", 0, &proc_stat_operations); | |
692 | create_seq_entry("interrupts", 0, &proc_interrupts_operations); | |
10cef602 | 693 | #ifdef CONFIG_SLAB |
1da177e4 | 694 | create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations); |
871751e2 AV |
695 | #ifdef CONFIG_DEBUG_SLAB_LEAK |
696 | create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations); | |
697 | #endif | |
10cef602 | 698 | #endif |
1da177e4 LT |
699 | create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations); |
700 | create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations); | |
295ab934 | 701 | create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations); |
1da177e4 LT |
702 | create_seq_entry("diskstats", 0, &proc_diskstats_operations); |
703 | #ifdef CONFIG_MODULES | |
704 | create_seq_entry("modules", 0, &proc_modules_operations); | |
705 | #endif | |
706 | #ifdef CONFIG_SCHEDSTATS | |
707 | create_seq_entry("schedstat", 0, &proc_schedstat_operations); | |
708 | #endif | |
709 | #ifdef CONFIG_PROC_KCORE | |
710 | proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL); | |
711 | if (proc_root_kcore) { | |
712 | proc_root_kcore->proc_fops = &proc_kcore_operations; | |
713 | proc_root_kcore->size = | |
714 | (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE; | |
715 | } | |
716 | #endif | |
666bfddb VG |
717 | #ifdef CONFIG_PROC_VMCORE |
718 | proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL); | |
719 | if (proc_vmcore) | |
720 | proc_vmcore->proc_fops = &proc_vmcore_operations; | |
721 | #endif | |
1da177e4 LT |
722 | #ifdef CONFIG_MAGIC_SYSRQ |
723 | entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL); | |
724 | if (entry) | |
725 | entry->proc_fops = &proc_sysrq_trigger_operations; | |
726 | #endif | |
1da177e4 | 727 | } |