Commit | Line | Data |
---|---|---|
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> | |
1da177e4 LT |
29 | #include <linux/mm.h> |
30 | #include <linux/mmzone.h> | |
31 | #include <linux/pagemap.h> | |
f74596d0 | 32 | #include <linux/interrupt.h> |
1da177e4 LT |
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> | |
1da177e4 LT |
39 | #include <linux/seq_file.h> |
40 | #include <linux/times.h> | |
41 | #include <linux/profile.h> | |
7bf65382 | 42 | #include <linux/utsname.h> |
1da177e4 LT |
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> |
61a58c6c | 49 | #include <linux/pid_namespace.h> |
161f47bf | 50 | #include <linux/bootmem.h> |
1da177e4 LT |
51 | #include <asm/uaccess.h> |
52 | #include <asm/pgtable.h> | |
53 | #include <asm/io.h> | |
54 | #include <asm/tlb.h> | |
55 | #include <asm/div64.h> | |
56 | #include "internal.h" | |
57 | ||
58 | #define LOAD_INT(x) ((x) >> FSHIFT) | |
59 | #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) | |
60 | /* | |
61 | * Warning: stuff below (imported functions) assumes that its output will fit | |
62 | * into one page. For some of those functions it may be wrong. Moreover, we | |
63 | * have a way to deal with that gracefully. Right now I used straightforward | |
64 | * wrappers, but this needs further analysis wrt potential overflows. | |
65 | */ | |
66 | extern int get_hardware_list(char *); | |
67 | extern int get_stram_list(char *); | |
1da177e4 LT |
68 | extern int get_exec_domain_list(char *); |
69 | extern int get_dma_list(char *); | |
1da177e4 LT |
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; | |
07a154b2 MS |
87 | unsigned long seq; |
88 | ||
89 | do { | |
90 | seq = read_seqbegin(&xtime_lock); | |
91 | a = avenrun[0] + (FIXED_1/200); | |
92 | b = avenrun[1] + (FIXED_1/200); | |
93 | c = avenrun[2] + (FIXED_1/200); | |
94 | } while (read_seqretry(&xtime_lock, seq)); | |
1da177e4 | 95 | |
1da177e4 LT |
96 | len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n", |
97 | LOAD_INT(a), LOAD_FRAC(a), | |
98 | LOAD_INT(b), LOAD_FRAC(b), | |
99 | LOAD_INT(c), LOAD_FRAC(c), | |
2894d650 SB |
100 | nr_running(), nr_threads, |
101 | task_active_pid_ns(current)->last_pid); | |
1da177e4 LT |
102 | return proc_calc_metrics(page, start, off, count, eof, len); |
103 | } | |
104 | ||
105 | static int uptime_read_proc(char *page, char **start, off_t off, | |
106 | int count, int *eof, void *data) | |
107 | { | |
108 | struct timespec uptime; | |
109 | struct timespec idle; | |
110 | int len; | |
111 | cputime_t idletime = cputime_add(init_task.utime, init_task.stime); | |
112 | ||
113 | do_posix_clock_monotonic_gettime(&uptime); | |
d6214141 | 114 | monotonic_to_bootbased(&uptime); |
1da177e4 LT |
115 | cputime_to_timespec(idletime, &idle); |
116 | len = sprintf(page,"%lu.%02lu %lu.%02lu\n", | |
117 | (unsigned long) uptime.tv_sec, | |
118 | (uptime.tv_nsec / (NSEC_PER_SEC / 100)), | |
119 | (unsigned long) idle.tv_sec, | |
120 | (idle.tv_nsec / (NSEC_PER_SEC / 100))); | |
121 | ||
122 | return proc_calc_metrics(page, start, off, count, eof, len); | |
123 | } | |
124 | ||
125 | static int meminfo_read_proc(char *page, char **start, off_t off, | |
126 | int count, int *eof, void *data) | |
127 | { | |
128 | struct sysinfo i; | |
129 | int len; | |
1da177e4 LT |
130 | unsigned long committed; |
131 | unsigned long allowed; | |
132 | struct vmalloc_info vmi; | |
4c4c402d | 133 | long cached; |
1da177e4 | 134 | |
1da177e4 LT |
135 | /* |
136 | * display in kilobytes. | |
137 | */ | |
138 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
139 | si_meminfo(&i); | |
140 | si_swapinfo(&i); | |
141 | committed = atomic_read(&vm_committed_space); | |
142 | allowed = ((totalram_pages - hugetlb_total_pages()) | |
143 | * sysctl_overcommit_ratio / 100) + total_swap_pages; | |
144 | ||
347ce434 CL |
145 | cached = global_page_state(NR_FILE_PAGES) - |
146 | total_swapcache_pages - i.bufferram; | |
4c4c402d MH |
147 | if (cached < 0) |
148 | cached = 0; | |
149 | ||
1da177e4 LT |
150 | get_vmalloc_info(&vmi); |
151 | ||
152 | /* | |
153 | * Tagged format, for easy grepping and expansion. | |
154 | */ | |
155 | len = sprintf(page, | |
156 | "MemTotal: %8lu kB\n" | |
157 | "MemFree: %8lu kB\n" | |
158 | "Buffers: %8lu kB\n" | |
159 | "Cached: %8lu kB\n" | |
160 | "SwapCached: %8lu kB\n" | |
161 | "Active: %8lu kB\n" | |
162 | "Inactive: %8lu kB\n" | |
182e8e23 | 163 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
164 | "HighTotal: %8lu kB\n" |
165 | "HighFree: %8lu kB\n" | |
166 | "LowTotal: %8lu kB\n" | |
167 | "LowFree: %8lu kB\n" | |
182e8e23 | 168 | #endif |
1da177e4 LT |
169 | "SwapTotal: %8lu kB\n" |
170 | "SwapFree: %8lu kB\n" | |
171 | "Dirty: %8lu kB\n" | |
172 | "Writeback: %8lu kB\n" | |
f3dbd344 | 173 | "AnonPages: %8lu kB\n" |
1da177e4 LT |
174 | "Mapped: %8lu kB\n" |
175 | "Slab: %8lu kB\n" | |
972d1a7b CL |
176 | "SReclaimable: %8lu kB\n" |
177 | "SUnreclaim: %8lu kB\n" | |
df849a15 | 178 | "PageTables: %8lu kB\n" |
f5ef68da | 179 | "NFS_Unstable: %8lu kB\n" |
d2c5e30c | 180 | "Bounce: %8lu kB\n" |
1da177e4 LT |
181 | "CommitLimit: %8lu kB\n" |
182 | "Committed_AS: %8lu kB\n" | |
1da177e4 LT |
183 | "VmallocTotal: %8lu kB\n" |
184 | "VmallocUsed: %8lu kB\n" | |
185 | "VmallocChunk: %8lu kB\n", | |
186 | K(i.totalram), | |
187 | K(i.freeram), | |
188 | K(i.bufferram), | |
4c4c402d | 189 | K(cached), |
1da177e4 | 190 | K(total_swapcache_pages), |
65e458d4 CL |
191 | K(global_page_state(NR_ACTIVE)), |
192 | K(global_page_state(NR_INACTIVE)), | |
182e8e23 | 193 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
194 | K(i.totalhigh), |
195 | K(i.freehigh), | |
196 | K(i.totalram-i.totalhigh), | |
197 | K(i.freeram-i.freehigh), | |
182e8e23 | 198 | #endif |
1da177e4 LT |
199 | K(i.totalswap), |
200 | K(i.freeswap), | |
b1e7a8fd | 201 | K(global_page_state(NR_FILE_DIRTY)), |
ce866b34 | 202 | K(global_page_state(NR_WRITEBACK)), |
f3dbd344 | 203 | K(global_page_state(NR_ANON_PAGES)), |
65ba55f5 | 204 | K(global_page_state(NR_FILE_MAPPED)), |
972d1a7b CL |
205 | K(global_page_state(NR_SLAB_RECLAIMABLE) + |
206 | global_page_state(NR_SLAB_UNRECLAIMABLE)), | |
207 | K(global_page_state(NR_SLAB_RECLAIMABLE)), | |
208 | K(global_page_state(NR_SLAB_UNRECLAIMABLE)), | |
df849a15 | 209 | K(global_page_state(NR_PAGETABLE)), |
fd39fc85 | 210 | K(global_page_state(NR_UNSTABLE_NFS)), |
d2c5e30c | 211 | K(global_page_state(NR_BOUNCE)), |
1da177e4 LT |
212 | K(allowed), |
213 | K(committed), | |
1da177e4 LT |
214 | (unsigned long)VMALLOC_TOTAL >> 10, |
215 | vmi.used >> 10, | |
216 | vmi.largest_chunk >> 10 | |
217 | ); | |
218 | ||
219 | len += hugetlb_report_meminfo(page + len); | |
220 | ||
221 | return proc_calc_metrics(page, start, off, count, eof, len); | |
222 | #undef K | |
223 | } | |
224 | ||
225 | extern struct seq_operations fragmentation_op; | |
226 | static int fragmentation_open(struct inode *inode, struct file *file) | |
227 | { | |
228 | (void)inode; | |
229 | return seq_open(file, &fragmentation_op); | |
230 | } | |
231 | ||
00977a59 | 232 | static const struct file_operations fragmentation_file_operations = { |
1da177e4 LT |
233 | .open = fragmentation_open, |
234 | .read = seq_read, | |
235 | .llseek = seq_lseek, | |
236 | .release = seq_release, | |
237 | }; | |
238 | ||
467c996c MG |
239 | extern struct seq_operations pagetypeinfo_op; |
240 | static int pagetypeinfo_open(struct inode *inode, struct file *file) | |
241 | { | |
242 | return seq_open(file, &pagetypeinfo_op); | |
243 | } | |
244 | ||
245 | static const struct file_operations pagetypeinfo_file_ops = { | |
246 | .open = pagetypeinfo_open, | |
247 | .read = seq_read, | |
248 | .llseek = seq_lseek, | |
249 | .release = seq_release, | |
250 | }; | |
251 | ||
295ab934 ND |
252 | extern struct seq_operations zoneinfo_op; |
253 | static int zoneinfo_open(struct inode *inode, struct file *file) | |
254 | { | |
255 | return seq_open(file, &zoneinfo_op); | |
256 | } | |
257 | ||
00977a59 | 258 | static const struct file_operations proc_zoneinfo_file_operations = { |
295ab934 ND |
259 | .open = zoneinfo_open, |
260 | .read = seq_read, | |
261 | .llseek = seq_lseek, | |
262 | .release = seq_release, | |
263 | }; | |
264 | ||
1da177e4 LT |
265 | static int version_read_proc(char *page, char **start, off_t off, |
266 | int count, int *eof, void *data) | |
267 | { | |
268 | int len; | |
269 | ||
3eb3c740 | 270 | len = snprintf(page, PAGE_SIZE, linux_proc_banner, |
8993780a LT |
271 | utsname()->sysname, |
272 | utsname()->release, | |
273 | utsname()->version); | |
1da177e4 LT |
274 | return proc_calc_metrics(page, start, off, count, eof, len); |
275 | } | |
276 | ||
277 | extern struct seq_operations cpuinfo_op; | |
278 | static int cpuinfo_open(struct inode *inode, struct file *file) | |
279 | { | |
280 | return seq_open(file, &cpuinfo_op); | |
281 | } | |
7170be5f | 282 | |
00977a59 | 283 | static const struct file_operations proc_cpuinfo_operations = { |
68eef3b4 JK |
284 | .open = cpuinfo_open, |
285 | .read = seq_read, | |
286 | .llseek = seq_lseek, | |
287 | .release = seq_release, | |
7170be5f NH |
288 | }; |
289 | ||
68eef3b4 | 290 | static int devinfo_show(struct seq_file *f, void *v) |
7170be5f | 291 | { |
68eef3b4 JK |
292 | int i = *(loff_t *) v; |
293 | ||
294 | if (i < CHRDEV_MAJOR_HASH_SIZE) { | |
295 | if (i == 0) | |
296 | seq_printf(f, "Character devices:\n"); | |
297 | chrdev_show(f, i); | |
9361401e DH |
298 | } |
299 | #ifdef CONFIG_BLOCK | |
300 | else { | |
68eef3b4 JK |
301 | i -= CHRDEV_MAJOR_HASH_SIZE; |
302 | if (i == 0) | |
303 | seq_printf(f, "\nBlock devices:\n"); | |
304 | blkdev_show(f, i); | |
7170be5f | 305 | } |
9361401e | 306 | #endif |
68eef3b4 | 307 | return 0; |
7170be5f NH |
308 | } |
309 | ||
68eef3b4 | 310 | static void *devinfo_start(struct seq_file *f, loff_t *pos) |
7170be5f | 311 | { |
68eef3b4 JK |
312 | if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE)) |
313 | return pos; | |
314 | return NULL; | |
7170be5f NH |
315 | } |
316 | ||
68eef3b4 | 317 | static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos) |
7170be5f | 318 | { |
68eef3b4 JK |
319 | (*pos)++; |
320 | if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE)) | |
321 | return NULL; | |
322 | return pos; | |
7170be5f NH |
323 | } |
324 | ||
68eef3b4 | 325 | static void devinfo_stop(struct seq_file *f, void *v) |
7170be5f | 326 | { |
68eef3b4 | 327 | /* Nothing to do */ |
7170be5f NH |
328 | } |
329 | ||
68eef3b4 JK |
330 | static struct seq_operations devinfo_ops = { |
331 | .start = devinfo_start, | |
332 | .next = devinfo_next, | |
333 | .stop = devinfo_stop, | |
334 | .show = devinfo_show | |
7170be5f NH |
335 | }; |
336 | ||
68eef3b4 | 337 | static int devinfo_open(struct inode *inode, struct file *filp) |
7170be5f | 338 | { |
68eef3b4 | 339 | return seq_open(filp, &devinfo_ops); |
7170be5f NH |
340 | } |
341 | ||
00977a59 | 342 | static const struct file_operations proc_devinfo_operations = { |
7170be5f NH |
343 | .open = devinfo_open, |
344 | .read = seq_read, | |
345 | .llseek = seq_lseek, | |
346 | .release = seq_release, | |
347 | }; | |
348 | ||
1da177e4 LT |
349 | extern struct seq_operations vmstat_op; |
350 | static int vmstat_open(struct inode *inode, struct file *file) | |
351 | { | |
352 | return seq_open(file, &vmstat_op); | |
353 | } | |
00977a59 | 354 | static const struct file_operations proc_vmstat_file_operations = { |
1da177e4 LT |
355 | .open = vmstat_open, |
356 | .read = seq_read, | |
357 | .llseek = seq_lseek, | |
358 | .release = seq_release, | |
359 | }; | |
360 | ||
361 | #ifdef CONFIG_PROC_HARDWARE | |
362 | static int hardware_read_proc(char *page, char **start, off_t off, | |
363 | int count, int *eof, void *data) | |
364 | { | |
365 | int len = get_hardware_list(page); | |
366 | return proc_calc_metrics(page, start, off, count, eof, len); | |
367 | } | |
368 | #endif | |
369 | ||
370 | #ifdef CONFIG_STRAM_PROC | |
371 | static int stram_read_proc(char *page, char **start, off_t off, | |
372 | int count, int *eof, void *data) | |
373 | { | |
374 | int len = get_stram_list(page); | |
375 | return proc_calc_metrics(page, start, off, count, eof, len); | |
376 | } | |
377 | #endif | |
378 | ||
9361401e | 379 | #ifdef CONFIG_BLOCK |
1da177e4 LT |
380 | extern struct seq_operations partitions_op; |
381 | static int partitions_open(struct inode *inode, struct file *file) | |
382 | { | |
383 | return seq_open(file, &partitions_op); | |
384 | } | |
00977a59 | 385 | static const struct file_operations proc_partitions_operations = { |
1da177e4 LT |
386 | .open = partitions_open, |
387 | .read = seq_read, | |
388 | .llseek = seq_lseek, | |
389 | .release = seq_release, | |
390 | }; | |
391 | ||
392 | extern struct seq_operations diskstats_op; | |
393 | static int diskstats_open(struct inode *inode, struct file *file) | |
394 | { | |
395 | return seq_open(file, &diskstats_op); | |
396 | } | |
00977a59 | 397 | static const struct file_operations proc_diskstats_operations = { |
1da177e4 LT |
398 | .open = diskstats_open, |
399 | .read = seq_read, | |
400 | .llseek = seq_lseek, | |
401 | .release = seq_release, | |
402 | }; | |
9361401e | 403 | #endif |
1da177e4 LT |
404 | |
405 | #ifdef CONFIG_MODULES | |
406 | extern struct seq_operations modules_op; | |
407 | static int modules_open(struct inode *inode, struct file *file) | |
408 | { | |
409 | return seq_open(file, &modules_op); | |
410 | } | |
00977a59 | 411 | static const struct file_operations proc_modules_operations = { |
1da177e4 LT |
412 | .open = modules_open, |
413 | .read = seq_read, | |
414 | .llseek = seq_lseek, | |
415 | .release = seq_release, | |
416 | }; | |
417 | #endif | |
418 | ||
158a9624 | 419 | #ifdef CONFIG_SLABINFO |
1da177e4 LT |
420 | static int slabinfo_open(struct inode *inode, struct file *file) |
421 | { | |
422 | return seq_open(file, &slabinfo_op); | |
423 | } | |
00977a59 | 424 | static const struct file_operations proc_slabinfo_operations = { |
1da177e4 LT |
425 | .open = slabinfo_open, |
426 | .read = seq_read, | |
427 | .write = slabinfo_write, | |
428 | .llseek = seq_lseek, | |
429 | .release = seq_release, | |
430 | }; | |
871751e2 AV |
431 | |
432 | #ifdef CONFIG_DEBUG_SLAB_LEAK | |
433 | extern struct seq_operations slabstats_op; | |
434 | static int slabstats_open(struct inode *inode, struct file *file) | |
435 | { | |
436 | unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
437 | int ret = -ENOMEM; | |
438 | if (n) { | |
439 | ret = seq_open(file, &slabstats_op); | |
440 | if (!ret) { | |
441 | struct seq_file *m = file->private_data; | |
442 | *n = PAGE_SIZE / (2 * sizeof(unsigned long)); | |
443 | m->private = n; | |
444 | n = NULL; | |
445 | } | |
446 | kfree(n); | |
447 | } | |
448 | return ret; | |
449 | } | |
450 | ||
00977a59 | 451 | static const struct file_operations proc_slabstats_operations = { |
871751e2 AV |
452 | .open = slabstats_open, |
453 | .read = seq_read, | |
454 | .llseek = seq_lseek, | |
09f0892e | 455 | .release = seq_release_private, |
871751e2 AV |
456 | }; |
457 | #endif | |
10cef602 | 458 | #endif |
1da177e4 LT |
459 | |
460 | static int show_stat(struct seq_file *p, void *v) | |
461 | { | |
462 | int i; | |
463 | unsigned long jif; | |
464 | cputime64_t user, nice, system, idle, iowait, irq, softirq, steal; | |
5e84cfde | 465 | cputime64_t guest; |
1da177e4 | 466 | u64 sum = 0; |
924b42d5 | 467 | struct timespec boottime; |
4004c69a RT |
468 | unsigned int *per_irq_sum; |
469 | ||
470 | per_irq_sum = kzalloc(sizeof(unsigned int)*NR_IRQS, GFP_KERNEL); | |
471 | if (!per_irq_sum) | |
472 | return -ENOMEM; | |
1da177e4 LT |
473 | |
474 | user = nice = system = idle = iowait = | |
475 | irq = softirq = steal = cputime64_zero; | |
5e84cfde | 476 | guest = cputime64_zero; |
924b42d5 TJ |
477 | getboottime(&boottime); |
478 | jif = boottime.tv_sec; | |
1da177e4 | 479 | |
0a945022 | 480 | for_each_possible_cpu(i) { |
1da177e4 LT |
481 | int j; |
482 | ||
483 | user = cputime64_add(user, kstat_cpu(i).cpustat.user); | |
484 | nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); | |
485 | system = cputime64_add(system, kstat_cpu(i).cpustat.system); | |
486 | idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); | |
487 | iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); | |
488 | irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); | |
489 | softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); | |
490 | steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); | |
5e84cfde | 491 | guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest); |
4004c69a RT |
492 | for (j = 0; j < NR_IRQS; j++) { |
493 | unsigned int temp = kstat_cpu(i).irqs[j]; | |
494 | sum += temp; | |
495 | per_irq_sum[j] += temp; | |
496 | } | |
1da177e4 LT |
497 | } |
498 | ||
5e84cfde | 499 | seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", |
1da177e4 LT |
500 | (unsigned long long)cputime64_to_clock_t(user), |
501 | (unsigned long long)cputime64_to_clock_t(nice), | |
502 | (unsigned long long)cputime64_to_clock_t(system), | |
503 | (unsigned long long)cputime64_to_clock_t(idle), | |
504 | (unsigned long long)cputime64_to_clock_t(iowait), | |
505 | (unsigned long long)cputime64_to_clock_t(irq), | |
506 | (unsigned long long)cputime64_to_clock_t(softirq), | |
5e84cfde LV |
507 | (unsigned long long)cputime64_to_clock_t(steal), |
508 | (unsigned long long)cputime64_to_clock_t(guest)); | |
1da177e4 LT |
509 | for_each_online_cpu(i) { |
510 | ||
511 | /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ | |
512 | user = kstat_cpu(i).cpustat.user; | |
513 | nice = kstat_cpu(i).cpustat.nice; | |
514 | system = kstat_cpu(i).cpustat.system; | |
515 | idle = kstat_cpu(i).cpustat.idle; | |
516 | iowait = kstat_cpu(i).cpustat.iowait; | |
517 | irq = kstat_cpu(i).cpustat.irq; | |
518 | softirq = kstat_cpu(i).cpustat.softirq; | |
519 | steal = kstat_cpu(i).cpustat.steal; | |
5e84cfde LV |
520 | guest = kstat_cpu(i).cpustat.guest; |
521 | seq_printf(p, | |
522 | "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", | |
1da177e4 LT |
523 | i, |
524 | (unsigned long long)cputime64_to_clock_t(user), | |
525 | (unsigned long long)cputime64_to_clock_t(nice), | |
526 | (unsigned long long)cputime64_to_clock_t(system), | |
527 | (unsigned long long)cputime64_to_clock_t(idle), | |
528 | (unsigned long long)cputime64_to_clock_t(iowait), | |
529 | (unsigned long long)cputime64_to_clock_t(irq), | |
530 | (unsigned long long)cputime64_to_clock_t(softirq), | |
5e84cfde LV |
531 | (unsigned long long)cputime64_to_clock_t(steal), |
532 | (unsigned long long)cputime64_to_clock_t(guest)); | |
1da177e4 LT |
533 | } |
534 | seq_printf(p, "intr %llu", (unsigned long long)sum); | |
535 | ||
1da177e4 | 536 | for (i = 0; i < NR_IRQS; i++) |
4004c69a | 537 | seq_printf(p, " %u", per_irq_sum[i]); |
1da177e4 LT |
538 | |
539 | seq_printf(p, | |
540 | "\nctxt %llu\n" | |
541 | "btime %lu\n" | |
542 | "processes %lu\n" | |
543 | "procs_running %lu\n" | |
544 | "procs_blocked %lu\n", | |
545 | nr_context_switches(), | |
546 | (unsigned long)jif, | |
547 | total_forks, | |
548 | nr_running(), | |
549 | nr_iowait()); | |
550 | ||
4004c69a | 551 | kfree(per_irq_sum); |
1da177e4 LT |
552 | return 0; |
553 | } | |
554 | ||
555 | static int stat_open(struct inode *inode, struct file *file) | |
556 | { | |
557 | unsigned size = 4096 * (1 + num_possible_cpus() / 32); | |
558 | char *buf; | |
559 | struct seq_file *m; | |
560 | int res; | |
561 | ||
562 | /* don't ask for more than the kmalloc() max size, currently 128 KB */ | |
563 | if (size > 128 * 1024) | |
564 | size = 128 * 1024; | |
565 | buf = kmalloc(size, GFP_KERNEL); | |
566 | if (!buf) | |
567 | return -ENOMEM; | |
568 | ||
569 | res = single_open(file, show_stat, NULL); | |
570 | if (!res) { | |
571 | m = file->private_data; | |
572 | m->buf = buf; | |
573 | m->size = size; | |
574 | } else | |
575 | kfree(buf); | |
576 | return res; | |
577 | } | |
00977a59 | 578 | static const struct file_operations proc_stat_operations = { |
1da177e4 LT |
579 | .open = stat_open, |
580 | .read = seq_read, | |
581 | .llseek = seq_lseek, | |
582 | .release = single_release, | |
583 | }; | |
584 | ||
1da177e4 LT |
585 | /* |
586 | * /proc/interrupts | |
587 | */ | |
588 | static void *int_seq_start(struct seq_file *f, loff_t *pos) | |
589 | { | |
590 | return (*pos <= NR_IRQS) ? pos : NULL; | |
591 | } | |
592 | ||
593 | static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos) | |
594 | { | |
595 | (*pos)++; | |
596 | if (*pos > NR_IRQS) | |
597 | return NULL; | |
598 | return pos; | |
599 | } | |
600 | ||
601 | static void int_seq_stop(struct seq_file *f, void *v) | |
602 | { | |
603 | /* Nothing to do */ | |
604 | } | |
605 | ||
606 | ||
1da177e4 LT |
607 | static struct seq_operations int_seq_ops = { |
608 | .start = int_seq_start, | |
609 | .next = int_seq_next, | |
610 | .stop = int_seq_stop, | |
611 | .show = show_interrupts | |
612 | }; | |
613 | ||
614 | static int interrupts_open(struct inode *inode, struct file *filp) | |
615 | { | |
616 | return seq_open(filp, &int_seq_ops); | |
617 | } | |
618 | ||
00977a59 | 619 | static const struct file_operations proc_interrupts_operations = { |
1da177e4 LT |
620 | .open = interrupts_open, |
621 | .read = seq_read, | |
622 | .llseek = seq_lseek, | |
623 | .release = seq_release, | |
624 | }; | |
625 | ||
626 | static int filesystems_read_proc(char *page, char **start, off_t off, | |
627 | int count, int *eof, void *data) | |
628 | { | |
629 | int len = get_filesystem_list(page); | |
630 | return proc_calc_metrics(page, start, off, count, eof, len); | |
631 | } | |
632 | ||
633 | static int cmdline_read_proc(char *page, char **start, off_t off, | |
634 | int count, int *eof, void *data) | |
635 | { | |
636 | int len; | |
637 | ||
638 | len = sprintf(page, "%s\n", saved_command_line); | |
639 | return proc_calc_metrics(page, start, off, count, eof, len); | |
640 | } | |
641 | ||
7f8ada98 | 642 | static int locks_open(struct inode *inode, struct file *filp) |
1da177e4 | 643 | { |
7f8ada98 | 644 | return seq_open(filp, &locks_seq_operations); |
1da177e4 LT |
645 | } |
646 | ||
7f8ada98 PE |
647 | static const struct file_operations proc_locks_operations = { |
648 | .open = locks_open, | |
649 | .read = seq_read, | |
650 | .llseek = seq_lseek, | |
651 | .release = seq_release, | |
652 | }; | |
653 | ||
1da177e4 LT |
654 | static int execdomains_read_proc(char *page, char **start, off_t off, |
655 | int count, int *eof, void *data) | |
656 | { | |
657 | int len = get_exec_domain_list(page); | |
658 | return proc_calc_metrics(page, start, off, count, eof, len); | |
659 | } | |
660 | ||
661 | #ifdef CONFIG_MAGIC_SYSRQ | |
662 | /* | |
663 | * writing 'C' to /proc/sysrq-trigger is like sysrq-C | |
664 | */ | |
665 | static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf, | |
666 | size_t count, loff_t *ppos) | |
667 | { | |
668 | if (count) { | |
669 | char c; | |
670 | ||
671 | if (get_user(c, buf)) | |
672 | return -EFAULT; | |
7d12e780 | 673 | __handle_sysrq(c, NULL, 0); |
1da177e4 LT |
674 | } |
675 | return count; | |
676 | } | |
677 | ||
00977a59 | 678 | static const struct file_operations proc_sysrq_trigger_operations = { |
1da177e4 LT |
679 | .write = write_sysrq_trigger, |
680 | }; | |
681 | #endif | |
682 | ||
1e883281 | 683 | #ifdef CONFIG_PROC_PAGE_MONITOR |
161f47bf MM |
684 | #define KPMSIZE sizeof(u64) |
685 | #define KPMMASK (KPMSIZE - 1) | |
686 | /* /proc/kpagecount - an array exposing page counts | |
687 | * | |
688 | * Each entry is a u64 representing the corresponding | |
689 | * physical page count. | |
690 | */ | |
691 | static ssize_t kpagecount_read(struct file *file, char __user *buf, | |
692 | size_t count, loff_t *ppos) | |
693 | { | |
694 | u64 __user *out = (u64 __user *)buf; | |
695 | struct page *ppage; | |
696 | unsigned long src = *ppos; | |
697 | unsigned long pfn; | |
698 | ssize_t ret = 0; | |
699 | u64 pcount; | |
700 | ||
701 | pfn = src / KPMSIZE; | |
702 | count = min_t(size_t, count, (max_pfn * KPMSIZE) - src); | |
703 | if (src & KPMMASK || count & KPMMASK) | |
704 | return -EIO; | |
705 | ||
706 | while (count > 0) { | |
304daa81 MM |
707 | ppage = NULL; |
708 | if (pfn_valid(pfn)) | |
709 | ppage = pfn_to_page(pfn); | |
710 | pfn++; | |
161f47bf MM |
711 | if (!ppage) |
712 | pcount = 0; | |
713 | else | |
714 | pcount = atomic_read(&ppage->_count); | |
715 | ||
716 | if (put_user(pcount, out++)) { | |
717 | ret = -EFAULT; | |
718 | break; | |
719 | } | |
720 | ||
721 | count -= KPMSIZE; | |
722 | } | |
723 | ||
724 | *ppos += (char __user *)out - buf; | |
725 | if (!ret) | |
726 | ret = (char __user *)out - buf; | |
727 | return ret; | |
728 | } | |
729 | ||
730 | static struct file_operations proc_kpagecount_operations = { | |
731 | .llseek = mem_lseek, | |
732 | .read = kpagecount_read, | |
733 | }; | |
734 | ||
304daa81 MM |
735 | /* /proc/kpageflags - an array exposing page flags |
736 | * | |
737 | * Each entry is a u64 representing the corresponding | |
738 | * physical page flags. | |
739 | */ | |
740 | ||
741 | /* These macros are used to decouple internal flags from exported ones */ | |
742 | ||
743 | #define KPF_LOCKED 0 | |
744 | #define KPF_ERROR 1 | |
745 | #define KPF_REFERENCED 2 | |
746 | #define KPF_UPTODATE 3 | |
747 | #define KPF_DIRTY 4 | |
748 | #define KPF_LRU 5 | |
749 | #define KPF_ACTIVE 6 | |
750 | #define KPF_SLAB 7 | |
751 | #define KPF_WRITEBACK 8 | |
752 | #define KPF_RECLAIM 9 | |
753 | #define KPF_BUDDY 10 | |
754 | ||
755 | #define kpf_copy_bit(flags, srcpos, dstpos) (((flags >> srcpos) & 1) << dstpos) | |
756 | ||
757 | static ssize_t kpageflags_read(struct file *file, char __user *buf, | |
758 | size_t count, loff_t *ppos) | |
759 | { | |
760 | u64 __user *out = (u64 __user *)buf; | |
761 | struct page *ppage; | |
762 | unsigned long src = *ppos; | |
763 | unsigned long pfn; | |
764 | ssize_t ret = 0; | |
765 | u64 kflags, uflags; | |
766 | ||
767 | pfn = src / KPMSIZE; | |
768 | count = min_t(unsigned long, count, (max_pfn * KPMSIZE) - src); | |
769 | if (src & KPMMASK || count & KPMMASK) | |
770 | return -EIO; | |
771 | ||
772 | while (count > 0) { | |
773 | ppage = NULL; | |
774 | if (pfn_valid(pfn)) | |
775 | ppage = pfn_to_page(pfn); | |
776 | pfn++; | |
777 | if (!ppage) | |
778 | kflags = 0; | |
779 | else | |
780 | kflags = ppage->flags; | |
781 | ||
782 | uflags = kpf_copy_bit(KPF_LOCKED, PG_locked, kflags) | | |
783 | kpf_copy_bit(kflags, KPF_ERROR, PG_error) | | |
784 | kpf_copy_bit(kflags, KPF_REFERENCED, PG_referenced) | | |
785 | kpf_copy_bit(kflags, KPF_UPTODATE, PG_uptodate) | | |
786 | kpf_copy_bit(kflags, KPF_DIRTY, PG_dirty) | | |
787 | kpf_copy_bit(kflags, KPF_LRU, PG_lru) | | |
788 | kpf_copy_bit(kflags, KPF_ACTIVE, PG_active) | | |
789 | kpf_copy_bit(kflags, KPF_SLAB, PG_slab) | | |
790 | kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) | | |
791 | kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) | | |
792 | kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy); | |
793 | ||
794 | if (put_user(uflags, out++)) { | |
795 | ret = -EFAULT; | |
796 | break; | |
797 | } | |
798 | ||
799 | count -= KPMSIZE; | |
800 | } | |
801 | ||
802 | *ppos += (char __user *)out - buf; | |
803 | if (!ret) | |
804 | ret = (char __user *)out - buf; | |
805 | return ret; | |
806 | } | |
807 | ||
808 | static struct file_operations proc_kpageflags_operations = { | |
809 | .llseek = mem_lseek, | |
810 | .read = kpageflags_read, | |
811 | }; | |
1e883281 | 812 | #endif /* CONFIG_PROC_PAGE_MONITOR */ |
304daa81 | 813 | |
1da177e4 LT |
814 | struct proc_dir_entry *proc_root_kcore; |
815 | ||
99ac48f5 | 816 | void create_seq_entry(char *name, mode_t mode, const struct file_operations *f) |
1da177e4 LT |
817 | { |
818 | struct proc_dir_entry *entry; | |
819 | entry = create_proc_entry(name, mode, NULL); | |
820 | if (entry) | |
821 | entry->proc_fops = f; | |
822 | } | |
823 | ||
824 | void __init proc_misc_init(void) | |
825 | { | |
1da177e4 LT |
826 | static struct { |
827 | char *name; | |
828 | int (*read_proc)(char*,char**,off_t,int,int*,void*); | |
829 | } *p, simple_ones[] = { | |
830 | {"loadavg", loadavg_read_proc}, | |
831 | {"uptime", uptime_read_proc}, | |
832 | {"meminfo", meminfo_read_proc}, | |
833 | {"version", version_read_proc}, | |
834 | #ifdef CONFIG_PROC_HARDWARE | |
835 | {"hardware", hardware_read_proc}, | |
836 | #endif | |
837 | #ifdef CONFIG_STRAM_PROC | |
838 | {"stram", stram_read_proc}, | |
839 | #endif | |
1da177e4 LT |
840 | {"filesystems", filesystems_read_proc}, |
841 | {"cmdline", cmdline_read_proc}, | |
1da177e4 LT |
842 | {"execdomains", execdomains_read_proc}, |
843 | {NULL,} | |
844 | }; | |
845 | for (p = simple_ones; p->name; p++) | |
846 | create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL); | |
847 | ||
848 | proc_symlink("mounts", NULL, "self/mounts"); | |
849 | ||
850 | /* And now for trickier ones */ | |
c36264df | 851 | #ifdef CONFIG_PRINTK |
100bb934 AM |
852 | { |
853 | struct proc_dir_entry *entry; | |
854 | entry = create_proc_entry("kmsg", S_IRUSR, &proc_root); | |
855 | if (entry) | |
856 | entry->proc_fops = &proc_kmsg_operations; | |
857 | } | |
c36264df | 858 | #endif |
7f8ada98 | 859 | create_seq_entry("locks", 0, &proc_locks_operations); |
7170be5f | 860 | create_seq_entry("devices", 0, &proc_devinfo_operations); |
1da177e4 | 861 | create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations); |
9361401e | 862 | #ifdef CONFIG_BLOCK |
1da177e4 | 863 | create_seq_entry("partitions", 0, &proc_partitions_operations); |
9361401e | 864 | #endif |
1da177e4 LT |
865 | create_seq_entry("stat", 0, &proc_stat_operations); |
866 | create_seq_entry("interrupts", 0, &proc_interrupts_operations); | |
158a9624 | 867 | #ifdef CONFIG_SLABINFO |
1da177e4 | 868 | create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations); |
871751e2 AV |
869 | #ifdef CONFIG_DEBUG_SLAB_LEAK |
870 | create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations); | |
871 | #endif | |
10cef602 | 872 | #endif |
1da177e4 | 873 | create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations); |
467c996c | 874 | create_seq_entry("pagetypeinfo", S_IRUGO, &pagetypeinfo_file_ops); |
1da177e4 | 875 | create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations); |
295ab934 | 876 | create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations); |
9361401e | 877 | #ifdef CONFIG_BLOCK |
1da177e4 | 878 | create_seq_entry("diskstats", 0, &proc_diskstats_operations); |
9361401e | 879 | #endif |
1da177e4 LT |
880 | #ifdef CONFIG_MODULES |
881 | create_seq_entry("modules", 0, &proc_modules_operations); | |
882 | #endif | |
883 | #ifdef CONFIG_SCHEDSTATS | |
884 | create_seq_entry("schedstat", 0, &proc_schedstat_operations); | |
885 | #endif | |
886 | #ifdef CONFIG_PROC_KCORE | |
887 | proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL); | |
888 | if (proc_root_kcore) { | |
889 | proc_root_kcore->proc_fops = &proc_kcore_operations; | |
890 | proc_root_kcore->size = | |
891 | (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE; | |
892 | } | |
893 | #endif | |
1e883281 | 894 | #ifdef CONFIG_PROC_PAGE_MONITOR |
161f47bf | 895 | create_seq_entry("kpagecount", S_IRUSR, &proc_kpagecount_operations); |
304daa81 | 896 | create_seq_entry("kpageflags", S_IRUSR, &proc_kpageflags_operations); |
1e883281 | 897 | #endif |
666bfddb VG |
898 | #ifdef CONFIG_PROC_VMCORE |
899 | proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL); | |
900 | if (proc_vmcore) | |
901 | proc_vmcore->proc_fops = &proc_vmcore_operations; | |
902 | #endif | |
1da177e4 | 903 | #ifdef CONFIG_MAGIC_SYSRQ |
100bb934 AM |
904 | { |
905 | struct proc_dir_entry *entry; | |
906 | entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL); | |
907 | if (entry) | |
908 | entry->proc_fops = &proc_sysrq_trigger_operations; | |
909 | } | |
1da177e4 | 910 | #endif |
1da177e4 | 911 | } |