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Commit | Line | Data |
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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> | |
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> | |
a0db701a | 35 | #include <linux/genhd.h> |
1da177e4 LT |
36 | #include <linux/smp.h> |
37 | #include <linux/signal.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/init.h> | |
1da177e4 LT |
40 | #include <linux/seq_file.h> |
41 | #include <linux/times.h> | |
42 | #include <linux/profile.h> | |
7bf65382 | 43 | #include <linux/utsname.h> |
1da177e4 LT |
44 | #include <linux/blkdev.h> |
45 | #include <linux/hugetlb.h> | |
46 | #include <linux/jiffies.h> | |
47 | #include <linux/sysrq.h> | |
48 | #include <linux/vmalloc.h> | |
666bfddb | 49 | #include <linux/crash_dump.h> |
61a58c6c | 50 | #include <linux/pid_namespace.h> |
161f47bf | 51 | #include <linux/bootmem.h> |
1da177e4 LT |
52 | #include <asm/uaccess.h> |
53 | #include <asm/pgtable.h> | |
54 | #include <asm/io.h> | |
55 | #include <asm/tlb.h> | |
56 | #include <asm/div64.h> | |
57 | #include "internal.h" | |
58 | ||
59 | #define LOAD_INT(x) ((x) >> FSHIFT) | |
60 | #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) | |
61 | /* | |
62 | * Warning: stuff below (imported functions) assumes that its output will fit | |
63 | * into one page. For some of those functions it may be wrong. Moreover, we | |
64 | * have a way to deal with that gracefully. Right now I used straightforward | |
65 | * wrappers, but this needs further analysis wrt potential overflows. | |
66 | */ | |
67 | extern int get_hardware_list(char *); | |
68 | extern int get_stram_list(char *); | |
1da177e4 LT |
69 | extern int get_exec_domain_list(char *); |
70 | extern int get_dma_list(char *); | |
1da177e4 LT |
71 | |
72 | static int proc_calc_metrics(char *page, char **start, off_t off, | |
73 | int count, int *eof, int len) | |
74 | { | |
75 | if (len <= off+count) *eof = 1; | |
76 | *start = page + off; | |
77 | len -= off; | |
78 | if (len>count) len = count; | |
79 | if (len<0) len = 0; | |
80 | return len; | |
81 | } | |
82 | ||
83 | static int loadavg_read_proc(char *page, char **start, off_t off, | |
84 | int count, int *eof, void *data) | |
85 | { | |
86 | int a, b, c; | |
87 | int len; | |
07a154b2 MS |
88 | unsigned long seq; |
89 | ||
90 | do { | |
91 | seq = read_seqbegin(&xtime_lock); | |
92 | a = avenrun[0] + (FIXED_1/200); | |
93 | b = avenrun[1] + (FIXED_1/200); | |
94 | c = avenrun[2] + (FIXED_1/200); | |
95 | } while (read_seqretry(&xtime_lock, seq)); | |
1da177e4 | 96 | |
1da177e4 LT |
97 | len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n", |
98 | LOAD_INT(a), LOAD_FRAC(a), | |
99 | LOAD_INT(b), LOAD_FRAC(b), | |
100 | LOAD_INT(c), LOAD_FRAC(c), | |
2894d650 SB |
101 | nr_running(), nr_threads, |
102 | task_active_pid_ns(current)->last_pid); | |
1da177e4 LT |
103 | return proc_calc_metrics(page, start, off, count, eof, len); |
104 | } | |
105 | ||
106 | static int uptime_read_proc(char *page, char **start, off_t off, | |
107 | int count, int *eof, void *data) | |
108 | { | |
109 | struct timespec uptime; | |
110 | struct timespec idle; | |
111 | int len; | |
112 | cputime_t idletime = cputime_add(init_task.utime, init_task.stime); | |
113 | ||
114 | do_posix_clock_monotonic_gettime(&uptime); | |
d6214141 | 115 | monotonic_to_bootbased(&uptime); |
1da177e4 LT |
116 | cputime_to_timespec(idletime, &idle); |
117 | len = sprintf(page,"%lu.%02lu %lu.%02lu\n", | |
118 | (unsigned long) uptime.tv_sec, | |
119 | (uptime.tv_nsec / (NSEC_PER_SEC / 100)), | |
120 | (unsigned long) idle.tv_sec, | |
121 | (idle.tv_nsec / (NSEC_PER_SEC / 100))); | |
122 | ||
123 | return proc_calc_metrics(page, start, off, count, eof, len); | |
124 | } | |
125 | ||
126 | static int meminfo_read_proc(char *page, char **start, off_t off, | |
127 | int count, int *eof, void *data) | |
128 | { | |
129 | struct sysinfo i; | |
130 | int len; | |
1da177e4 LT |
131 | unsigned long committed; |
132 | unsigned long allowed; | |
133 | struct vmalloc_info vmi; | |
4c4c402d | 134 | long cached; |
1da177e4 | 135 | |
1da177e4 LT |
136 | /* |
137 | * display in kilobytes. | |
138 | */ | |
139 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
140 | si_meminfo(&i); | |
141 | si_swapinfo(&i); | |
142 | committed = atomic_read(&vm_committed_space); | |
143 | allowed = ((totalram_pages - hugetlb_total_pages()) | |
144 | * sysctl_overcommit_ratio / 100) + total_swap_pages; | |
145 | ||
347ce434 CL |
146 | cached = global_page_state(NR_FILE_PAGES) - |
147 | total_swapcache_pages - i.bufferram; | |
4c4c402d MH |
148 | if (cached < 0) |
149 | cached = 0; | |
150 | ||
1da177e4 LT |
151 | get_vmalloc_info(&vmi); |
152 | ||
153 | /* | |
154 | * Tagged format, for easy grepping and expansion. | |
155 | */ | |
156 | len = sprintf(page, | |
157 | "MemTotal: %8lu kB\n" | |
158 | "MemFree: %8lu kB\n" | |
159 | "Buffers: %8lu kB\n" | |
160 | "Cached: %8lu kB\n" | |
161 | "SwapCached: %8lu kB\n" | |
162 | "Active: %8lu kB\n" | |
163 | "Inactive: %8lu kB\n" | |
182e8e23 | 164 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
165 | "HighTotal: %8lu kB\n" |
166 | "HighFree: %8lu kB\n" | |
167 | "LowTotal: %8lu kB\n" | |
168 | "LowFree: %8lu kB\n" | |
182e8e23 | 169 | #endif |
1da177e4 LT |
170 | "SwapTotal: %8lu kB\n" |
171 | "SwapFree: %8lu kB\n" | |
172 | "Dirty: %8lu kB\n" | |
173 | "Writeback: %8lu kB\n" | |
f3dbd344 | 174 | "AnonPages: %8lu kB\n" |
1da177e4 LT |
175 | "Mapped: %8lu kB\n" |
176 | "Slab: %8lu kB\n" | |
972d1a7b CL |
177 | "SReclaimable: %8lu kB\n" |
178 | "SUnreclaim: %8lu kB\n" | |
df849a15 | 179 | "PageTables: %8lu kB\n" |
f5ef68da | 180 | "NFS_Unstable: %8lu kB\n" |
d2c5e30c | 181 | "Bounce: %8lu kB\n" |
fc3ba692 | 182 | "WritebackTmp: %8lu kB\n" |
1da177e4 LT |
183 | "CommitLimit: %8lu kB\n" |
184 | "Committed_AS: %8lu kB\n" | |
1da177e4 LT |
185 | "VmallocTotal: %8lu kB\n" |
186 | "VmallocUsed: %8lu kB\n" | |
187 | "VmallocChunk: %8lu kB\n", | |
188 | K(i.totalram), | |
189 | K(i.freeram), | |
190 | K(i.bufferram), | |
4c4c402d | 191 | K(cached), |
1da177e4 | 192 | K(total_swapcache_pages), |
65e458d4 CL |
193 | K(global_page_state(NR_ACTIVE)), |
194 | K(global_page_state(NR_INACTIVE)), | |
182e8e23 | 195 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
196 | K(i.totalhigh), |
197 | K(i.freehigh), | |
198 | K(i.totalram-i.totalhigh), | |
199 | K(i.freeram-i.freehigh), | |
182e8e23 | 200 | #endif |
1da177e4 LT |
201 | K(i.totalswap), |
202 | K(i.freeswap), | |
b1e7a8fd | 203 | K(global_page_state(NR_FILE_DIRTY)), |
ce866b34 | 204 | K(global_page_state(NR_WRITEBACK)), |
f3dbd344 | 205 | K(global_page_state(NR_ANON_PAGES)), |
65ba55f5 | 206 | K(global_page_state(NR_FILE_MAPPED)), |
972d1a7b CL |
207 | K(global_page_state(NR_SLAB_RECLAIMABLE) + |
208 | global_page_state(NR_SLAB_UNRECLAIMABLE)), | |
209 | K(global_page_state(NR_SLAB_RECLAIMABLE)), | |
210 | K(global_page_state(NR_SLAB_UNRECLAIMABLE)), | |
df849a15 | 211 | K(global_page_state(NR_PAGETABLE)), |
fd39fc85 | 212 | K(global_page_state(NR_UNSTABLE_NFS)), |
d2c5e30c | 213 | K(global_page_state(NR_BOUNCE)), |
fc3ba692 | 214 | K(global_page_state(NR_WRITEBACK_TEMP)), |
1da177e4 LT |
215 | K(allowed), |
216 | K(committed), | |
1da177e4 LT |
217 | (unsigned long)VMALLOC_TOTAL >> 10, |
218 | vmi.used >> 10, | |
219 | vmi.largest_chunk >> 10 | |
220 | ); | |
221 | ||
222 | len += hugetlb_report_meminfo(page + len); | |
223 | ||
224 | return proc_calc_metrics(page, start, off, count, eof, len); | |
225 | #undef K | |
226 | } | |
227 | ||
03a44825 | 228 | extern const struct seq_operations fragmentation_op; |
1da177e4 LT |
229 | static int fragmentation_open(struct inode *inode, struct file *file) |
230 | { | |
231 | (void)inode; | |
232 | return seq_open(file, &fragmentation_op); | |
233 | } | |
234 | ||
00977a59 | 235 | static const struct file_operations fragmentation_file_operations = { |
1da177e4 LT |
236 | .open = fragmentation_open, |
237 | .read = seq_read, | |
238 | .llseek = seq_lseek, | |
239 | .release = seq_release, | |
240 | }; | |
241 | ||
03a44825 | 242 | extern const struct seq_operations pagetypeinfo_op; |
467c996c MG |
243 | static int pagetypeinfo_open(struct inode *inode, struct file *file) |
244 | { | |
245 | return seq_open(file, &pagetypeinfo_op); | |
246 | } | |
247 | ||
248 | static const struct file_operations pagetypeinfo_file_ops = { | |
249 | .open = pagetypeinfo_open, | |
250 | .read = seq_read, | |
251 | .llseek = seq_lseek, | |
252 | .release = seq_release, | |
253 | }; | |
254 | ||
03a44825 | 255 | extern const struct seq_operations zoneinfo_op; |
295ab934 ND |
256 | static int zoneinfo_open(struct inode *inode, struct file *file) |
257 | { | |
258 | return seq_open(file, &zoneinfo_op); | |
259 | } | |
260 | ||
00977a59 | 261 | static const struct file_operations proc_zoneinfo_file_operations = { |
295ab934 ND |
262 | .open = zoneinfo_open, |
263 | .read = seq_read, | |
264 | .llseek = seq_lseek, | |
265 | .release = seq_release, | |
266 | }; | |
267 | ||
1da177e4 LT |
268 | static int version_read_proc(char *page, char **start, off_t off, |
269 | int count, int *eof, void *data) | |
270 | { | |
271 | int len; | |
272 | ||
3eb3c740 | 273 | len = snprintf(page, PAGE_SIZE, linux_proc_banner, |
8993780a LT |
274 | utsname()->sysname, |
275 | utsname()->release, | |
276 | utsname()->version); | |
1da177e4 LT |
277 | return proc_calc_metrics(page, start, off, count, eof, len); |
278 | } | |
279 | ||
03a44825 | 280 | extern const struct seq_operations cpuinfo_op; |
1da177e4 LT |
281 | static int cpuinfo_open(struct inode *inode, struct file *file) |
282 | { | |
283 | return seq_open(file, &cpuinfo_op); | |
284 | } | |
7170be5f | 285 | |
00977a59 | 286 | static const struct file_operations proc_cpuinfo_operations = { |
68eef3b4 JK |
287 | .open = cpuinfo_open, |
288 | .read = seq_read, | |
289 | .llseek = seq_lseek, | |
290 | .release = seq_release, | |
7170be5f NH |
291 | }; |
292 | ||
68eef3b4 | 293 | static int devinfo_show(struct seq_file *f, void *v) |
7170be5f | 294 | { |
68eef3b4 JK |
295 | int i = *(loff_t *) v; |
296 | ||
297 | if (i < CHRDEV_MAJOR_HASH_SIZE) { | |
298 | if (i == 0) | |
299 | seq_printf(f, "Character devices:\n"); | |
300 | chrdev_show(f, i); | |
9361401e DH |
301 | } |
302 | #ifdef CONFIG_BLOCK | |
303 | else { | |
68eef3b4 JK |
304 | i -= CHRDEV_MAJOR_HASH_SIZE; |
305 | if (i == 0) | |
306 | seq_printf(f, "\nBlock devices:\n"); | |
307 | blkdev_show(f, i); | |
7170be5f | 308 | } |
9361401e | 309 | #endif |
68eef3b4 | 310 | return 0; |
7170be5f NH |
311 | } |
312 | ||
68eef3b4 | 313 | static void *devinfo_start(struct seq_file *f, loff_t *pos) |
7170be5f | 314 | { |
68eef3b4 JK |
315 | if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE)) |
316 | return pos; | |
317 | return NULL; | |
7170be5f NH |
318 | } |
319 | ||
68eef3b4 | 320 | static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos) |
7170be5f | 321 | { |
68eef3b4 JK |
322 | (*pos)++; |
323 | if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE)) | |
324 | return NULL; | |
325 | return pos; | |
7170be5f NH |
326 | } |
327 | ||
68eef3b4 | 328 | static void devinfo_stop(struct seq_file *f, void *v) |
7170be5f | 329 | { |
68eef3b4 | 330 | /* Nothing to do */ |
7170be5f NH |
331 | } |
332 | ||
03a44825 | 333 | static const struct seq_operations devinfo_ops = { |
68eef3b4 JK |
334 | .start = devinfo_start, |
335 | .next = devinfo_next, | |
336 | .stop = devinfo_stop, | |
337 | .show = devinfo_show | |
7170be5f NH |
338 | }; |
339 | ||
68eef3b4 | 340 | static int devinfo_open(struct inode *inode, struct file *filp) |
7170be5f | 341 | { |
68eef3b4 | 342 | return seq_open(filp, &devinfo_ops); |
7170be5f NH |
343 | } |
344 | ||
00977a59 | 345 | static const struct file_operations proc_devinfo_operations = { |
7170be5f NH |
346 | .open = devinfo_open, |
347 | .read = seq_read, | |
348 | .llseek = seq_lseek, | |
349 | .release = seq_release, | |
350 | }; | |
351 | ||
03a44825 | 352 | extern const struct seq_operations vmstat_op; |
1da177e4 LT |
353 | static int vmstat_open(struct inode *inode, struct file *file) |
354 | { | |
355 | return seq_open(file, &vmstat_op); | |
356 | } | |
00977a59 | 357 | static const struct file_operations proc_vmstat_file_operations = { |
1da177e4 LT |
358 | .open = vmstat_open, |
359 | .read = seq_read, | |
360 | .llseek = seq_lseek, | |
361 | .release = seq_release, | |
362 | }; | |
363 | ||
364 | #ifdef CONFIG_PROC_HARDWARE | |
365 | static int hardware_read_proc(char *page, char **start, off_t off, | |
366 | int count, int *eof, void *data) | |
367 | { | |
368 | int len = get_hardware_list(page); | |
369 | return proc_calc_metrics(page, start, off, count, eof, len); | |
370 | } | |
371 | #endif | |
372 | ||
373 | #ifdef CONFIG_STRAM_PROC | |
374 | static int stram_read_proc(char *page, char **start, off_t off, | |
375 | int count, int *eof, void *data) | |
376 | { | |
377 | int len = get_stram_list(page); | |
378 | return proc_calc_metrics(page, start, off, count, eof, len); | |
379 | } | |
380 | #endif | |
381 | ||
9361401e | 382 | #ifdef CONFIG_BLOCK |
1da177e4 LT |
383 | static int partitions_open(struct inode *inode, struct file *file) |
384 | { | |
385 | return seq_open(file, &partitions_op); | |
386 | } | |
00977a59 | 387 | static const struct file_operations proc_partitions_operations = { |
1da177e4 LT |
388 | .open = partitions_open, |
389 | .read = seq_read, | |
390 | .llseek = seq_lseek, | |
391 | .release = seq_release, | |
392 | }; | |
393 | ||
1da177e4 LT |
394 | static int diskstats_open(struct inode *inode, struct file *file) |
395 | { | |
396 | return seq_open(file, &diskstats_op); | |
397 | } | |
00977a59 | 398 | static const struct file_operations proc_diskstats_operations = { |
1da177e4 LT |
399 | .open = diskstats_open, |
400 | .read = seq_read, | |
401 | .llseek = seq_lseek, | |
402 | .release = seq_release, | |
403 | }; | |
9361401e | 404 | #endif |
1da177e4 LT |
405 | |
406 | #ifdef CONFIG_MODULES | |
03a44825 | 407 | extern const struct seq_operations modules_op; |
1da177e4 LT |
408 | static int modules_open(struct inode *inode, struct file *file) |
409 | { | |
410 | return seq_open(file, &modules_op); | |
411 | } | |
00977a59 | 412 | static const struct file_operations proc_modules_operations = { |
1da177e4 LT |
413 | .open = modules_open, |
414 | .read = seq_read, | |
415 | .llseek = seq_lseek, | |
416 | .release = seq_release, | |
417 | }; | |
418 | #endif | |
419 | ||
158a9624 | 420 | #ifdef CONFIG_SLABINFO |
1da177e4 LT |
421 | static int slabinfo_open(struct inode *inode, struct file *file) |
422 | { | |
423 | return seq_open(file, &slabinfo_op); | |
424 | } | |
00977a59 | 425 | static const struct file_operations proc_slabinfo_operations = { |
1da177e4 LT |
426 | .open = slabinfo_open, |
427 | .read = seq_read, | |
428 | .write = slabinfo_write, | |
429 | .llseek = seq_lseek, | |
430 | .release = seq_release, | |
431 | }; | |
871751e2 AV |
432 | |
433 | #ifdef CONFIG_DEBUG_SLAB_LEAK | |
03a44825 | 434 | extern const struct seq_operations slabstats_op; |
871751e2 AV |
435 | static int slabstats_open(struct inode *inode, struct file *file) |
436 | { | |
437 | unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
438 | int ret = -ENOMEM; | |
439 | if (n) { | |
440 | ret = seq_open(file, &slabstats_op); | |
441 | if (!ret) { | |
442 | struct seq_file *m = file->private_data; | |
443 | *n = PAGE_SIZE / (2 * sizeof(unsigned long)); | |
444 | m->private = n; | |
445 | n = NULL; | |
446 | } | |
447 | kfree(n); | |
448 | } | |
449 | return ret; | |
450 | } | |
451 | ||
00977a59 | 452 | static const struct file_operations proc_slabstats_operations = { |
871751e2 AV |
453 | .open = slabstats_open, |
454 | .read = seq_read, | |
455 | .llseek = seq_lseek, | |
09f0892e | 456 | .release = seq_release_private, |
871751e2 AV |
457 | }; |
458 | #endif | |
10cef602 | 459 | #endif |
1da177e4 | 460 | |
a10aa579 CL |
461 | #ifdef CONFIG_MMU |
462 | static int vmalloc_open(struct inode *inode, struct file *file) | |
463 | { | |
464 | return seq_open(file, &vmalloc_op); | |
465 | } | |
466 | ||
467 | static const struct file_operations proc_vmalloc_operations = { | |
468 | .open = vmalloc_open, | |
469 | .read = seq_read, | |
470 | .llseek = seq_lseek, | |
471 | .release = seq_release, | |
472 | }; | |
473 | #endif | |
474 | ||
1da177e4 LT |
475 | static int show_stat(struct seq_file *p, void *v) |
476 | { | |
477 | int i; | |
478 | unsigned long jif; | |
479 | cputime64_t user, nice, system, idle, iowait, irq, softirq, steal; | |
5e84cfde | 480 | cputime64_t guest; |
1da177e4 | 481 | u64 sum = 0; |
924b42d5 | 482 | struct timespec boottime; |
4004c69a RT |
483 | unsigned int *per_irq_sum; |
484 | ||
485 | per_irq_sum = kzalloc(sizeof(unsigned int)*NR_IRQS, GFP_KERNEL); | |
486 | if (!per_irq_sum) | |
487 | return -ENOMEM; | |
1da177e4 LT |
488 | |
489 | user = nice = system = idle = iowait = | |
490 | irq = softirq = steal = cputime64_zero; | |
5e84cfde | 491 | guest = cputime64_zero; |
924b42d5 TJ |
492 | getboottime(&boottime); |
493 | jif = boottime.tv_sec; | |
1da177e4 | 494 | |
0a945022 | 495 | for_each_possible_cpu(i) { |
1da177e4 LT |
496 | int j; |
497 | ||
498 | user = cputime64_add(user, kstat_cpu(i).cpustat.user); | |
499 | nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); | |
500 | system = cputime64_add(system, kstat_cpu(i).cpustat.system); | |
501 | idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); | |
502 | iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); | |
503 | irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); | |
504 | softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); | |
505 | steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); | |
5e84cfde | 506 | guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest); |
4004c69a RT |
507 | for (j = 0; j < NR_IRQS; j++) { |
508 | unsigned int temp = kstat_cpu(i).irqs[j]; | |
509 | sum += temp; | |
510 | per_irq_sum[j] += temp; | |
511 | } | |
1da177e4 LT |
512 | } |
513 | ||
5e84cfde | 514 | seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", |
1da177e4 LT |
515 | (unsigned long long)cputime64_to_clock_t(user), |
516 | (unsigned long long)cputime64_to_clock_t(nice), | |
517 | (unsigned long long)cputime64_to_clock_t(system), | |
518 | (unsigned long long)cputime64_to_clock_t(idle), | |
519 | (unsigned long long)cputime64_to_clock_t(iowait), | |
520 | (unsigned long long)cputime64_to_clock_t(irq), | |
521 | (unsigned long long)cputime64_to_clock_t(softirq), | |
5e84cfde LV |
522 | (unsigned long long)cputime64_to_clock_t(steal), |
523 | (unsigned long long)cputime64_to_clock_t(guest)); | |
1da177e4 LT |
524 | for_each_online_cpu(i) { |
525 | ||
526 | /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ | |
527 | user = kstat_cpu(i).cpustat.user; | |
528 | nice = kstat_cpu(i).cpustat.nice; | |
529 | system = kstat_cpu(i).cpustat.system; | |
530 | idle = kstat_cpu(i).cpustat.idle; | |
531 | iowait = kstat_cpu(i).cpustat.iowait; | |
532 | irq = kstat_cpu(i).cpustat.irq; | |
533 | softirq = kstat_cpu(i).cpustat.softirq; | |
534 | steal = kstat_cpu(i).cpustat.steal; | |
5e84cfde LV |
535 | guest = kstat_cpu(i).cpustat.guest; |
536 | seq_printf(p, | |
537 | "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", | |
1da177e4 LT |
538 | i, |
539 | (unsigned long long)cputime64_to_clock_t(user), | |
540 | (unsigned long long)cputime64_to_clock_t(nice), | |
541 | (unsigned long long)cputime64_to_clock_t(system), | |
542 | (unsigned long long)cputime64_to_clock_t(idle), | |
543 | (unsigned long long)cputime64_to_clock_t(iowait), | |
544 | (unsigned long long)cputime64_to_clock_t(irq), | |
545 | (unsigned long long)cputime64_to_clock_t(softirq), | |
5e84cfde LV |
546 | (unsigned long long)cputime64_to_clock_t(steal), |
547 | (unsigned long long)cputime64_to_clock_t(guest)); | |
1da177e4 LT |
548 | } |
549 | seq_printf(p, "intr %llu", (unsigned long long)sum); | |
550 | ||
1da177e4 | 551 | for (i = 0; i < NR_IRQS; i++) |
4004c69a | 552 | seq_printf(p, " %u", per_irq_sum[i]); |
1da177e4 LT |
553 | |
554 | seq_printf(p, | |
555 | "\nctxt %llu\n" | |
556 | "btime %lu\n" | |
557 | "processes %lu\n" | |
558 | "procs_running %lu\n" | |
559 | "procs_blocked %lu\n", | |
560 | nr_context_switches(), | |
561 | (unsigned long)jif, | |
562 | total_forks, | |
563 | nr_running(), | |
564 | nr_iowait()); | |
565 | ||
4004c69a | 566 | kfree(per_irq_sum); |
1da177e4 LT |
567 | return 0; |
568 | } | |
569 | ||
570 | static int stat_open(struct inode *inode, struct file *file) | |
571 | { | |
572 | unsigned size = 4096 * (1 + num_possible_cpus() / 32); | |
573 | char *buf; | |
574 | struct seq_file *m; | |
575 | int res; | |
576 | ||
577 | /* don't ask for more than the kmalloc() max size, currently 128 KB */ | |
578 | if (size > 128 * 1024) | |
579 | size = 128 * 1024; | |
580 | buf = kmalloc(size, GFP_KERNEL); | |
581 | if (!buf) | |
582 | return -ENOMEM; | |
583 | ||
584 | res = single_open(file, show_stat, NULL); | |
585 | if (!res) { | |
586 | m = file->private_data; | |
587 | m->buf = buf; | |
588 | m->size = size; | |
589 | } else | |
590 | kfree(buf); | |
591 | return res; | |
592 | } | |
00977a59 | 593 | static const struct file_operations proc_stat_operations = { |
1da177e4 LT |
594 | .open = stat_open, |
595 | .read = seq_read, | |
596 | .llseek = seq_lseek, | |
597 | .release = single_release, | |
598 | }; | |
599 | ||
1da177e4 LT |
600 | /* |
601 | * /proc/interrupts | |
602 | */ | |
603 | static void *int_seq_start(struct seq_file *f, loff_t *pos) | |
604 | { | |
605 | return (*pos <= NR_IRQS) ? pos : NULL; | |
606 | } | |
607 | ||
608 | static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos) | |
609 | { | |
610 | (*pos)++; | |
611 | if (*pos > NR_IRQS) | |
612 | return NULL; | |
613 | return pos; | |
614 | } | |
615 | ||
616 | static void int_seq_stop(struct seq_file *f, void *v) | |
617 | { | |
618 | /* Nothing to do */ | |
619 | } | |
620 | ||
621 | ||
03a44825 | 622 | static const struct seq_operations int_seq_ops = { |
1da177e4 LT |
623 | .start = int_seq_start, |
624 | .next = int_seq_next, | |
625 | .stop = int_seq_stop, | |
626 | .show = show_interrupts | |
627 | }; | |
628 | ||
629 | static int interrupts_open(struct inode *inode, struct file *filp) | |
630 | { | |
631 | return seq_open(filp, &int_seq_ops); | |
632 | } | |
633 | ||
00977a59 | 634 | static const struct file_operations proc_interrupts_operations = { |
1da177e4 LT |
635 | .open = interrupts_open, |
636 | .read = seq_read, | |
637 | .llseek = seq_lseek, | |
638 | .release = seq_release, | |
639 | }; | |
640 | ||
641 | static int filesystems_read_proc(char *page, char **start, off_t off, | |
642 | int count, int *eof, void *data) | |
643 | { | |
644 | int len = get_filesystem_list(page); | |
645 | return proc_calc_metrics(page, start, off, count, eof, len); | |
646 | } | |
647 | ||
648 | static int cmdline_read_proc(char *page, char **start, off_t off, | |
649 | int count, int *eof, void *data) | |
650 | { | |
651 | int len; | |
652 | ||
653 | len = sprintf(page, "%s\n", saved_command_line); | |
654 | return proc_calc_metrics(page, start, off, count, eof, len); | |
655 | } | |
656 | ||
7f8ada98 | 657 | static int locks_open(struct inode *inode, struct file *filp) |
1da177e4 | 658 | { |
7f8ada98 | 659 | return seq_open(filp, &locks_seq_operations); |
1da177e4 LT |
660 | } |
661 | ||
7f8ada98 PE |
662 | static const struct file_operations proc_locks_operations = { |
663 | .open = locks_open, | |
664 | .read = seq_read, | |
665 | .llseek = seq_lseek, | |
666 | .release = seq_release, | |
667 | }; | |
668 | ||
1da177e4 LT |
669 | static int execdomains_read_proc(char *page, char **start, off_t off, |
670 | int count, int *eof, void *data) | |
671 | { | |
672 | int len = get_exec_domain_list(page); | |
673 | return proc_calc_metrics(page, start, off, count, eof, len); | |
674 | } | |
675 | ||
676 | #ifdef CONFIG_MAGIC_SYSRQ | |
677 | /* | |
678 | * writing 'C' to /proc/sysrq-trigger is like sysrq-C | |
679 | */ | |
680 | static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf, | |
681 | size_t count, loff_t *ppos) | |
682 | { | |
683 | if (count) { | |
684 | char c; | |
685 | ||
686 | if (get_user(c, buf)) | |
687 | return -EFAULT; | |
7d12e780 | 688 | __handle_sysrq(c, NULL, 0); |
1da177e4 LT |
689 | } |
690 | return count; | |
691 | } | |
692 | ||
00977a59 | 693 | static const struct file_operations proc_sysrq_trigger_operations = { |
1da177e4 LT |
694 | .write = write_sysrq_trigger, |
695 | }; | |
696 | #endif | |
697 | ||
1e883281 | 698 | #ifdef CONFIG_PROC_PAGE_MONITOR |
161f47bf MM |
699 | #define KPMSIZE sizeof(u64) |
700 | #define KPMMASK (KPMSIZE - 1) | |
701 | /* /proc/kpagecount - an array exposing page counts | |
702 | * | |
703 | * Each entry is a u64 representing the corresponding | |
704 | * physical page count. | |
705 | */ | |
706 | static ssize_t kpagecount_read(struct file *file, char __user *buf, | |
707 | size_t count, loff_t *ppos) | |
708 | { | |
709 | u64 __user *out = (u64 __user *)buf; | |
710 | struct page *ppage; | |
711 | unsigned long src = *ppos; | |
712 | unsigned long pfn; | |
713 | ssize_t ret = 0; | |
714 | u64 pcount; | |
715 | ||
716 | pfn = src / KPMSIZE; | |
717 | count = min_t(size_t, count, (max_pfn * KPMSIZE) - src); | |
718 | if (src & KPMMASK || count & KPMMASK) | |
719 | return -EIO; | |
720 | ||
721 | while (count > 0) { | |
304daa81 MM |
722 | ppage = NULL; |
723 | if (pfn_valid(pfn)) | |
724 | ppage = pfn_to_page(pfn); | |
725 | pfn++; | |
161f47bf MM |
726 | if (!ppage) |
727 | pcount = 0; | |
728 | else | |
729 | pcount = atomic_read(&ppage->_count); | |
730 | ||
731 | if (put_user(pcount, out++)) { | |
732 | ret = -EFAULT; | |
733 | break; | |
734 | } | |
735 | ||
736 | count -= KPMSIZE; | |
737 | } | |
738 | ||
739 | *ppos += (char __user *)out - buf; | |
740 | if (!ret) | |
741 | ret = (char __user *)out - buf; | |
742 | return ret; | |
743 | } | |
744 | ||
745 | static struct file_operations proc_kpagecount_operations = { | |
746 | .llseek = mem_lseek, | |
747 | .read = kpagecount_read, | |
748 | }; | |
749 | ||
304daa81 MM |
750 | /* /proc/kpageflags - an array exposing page flags |
751 | * | |
752 | * Each entry is a u64 representing the corresponding | |
753 | * physical page flags. | |
754 | */ | |
755 | ||
756 | /* These macros are used to decouple internal flags from exported ones */ | |
757 | ||
758 | #define KPF_LOCKED 0 | |
759 | #define KPF_ERROR 1 | |
760 | #define KPF_REFERENCED 2 | |
761 | #define KPF_UPTODATE 3 | |
762 | #define KPF_DIRTY 4 | |
763 | #define KPF_LRU 5 | |
764 | #define KPF_ACTIVE 6 | |
765 | #define KPF_SLAB 7 | |
766 | #define KPF_WRITEBACK 8 | |
767 | #define KPF_RECLAIM 9 | |
768 | #define KPF_BUDDY 10 | |
769 | ||
770 | #define kpf_copy_bit(flags, srcpos, dstpos) (((flags >> srcpos) & 1) << dstpos) | |
771 | ||
772 | static ssize_t kpageflags_read(struct file *file, char __user *buf, | |
773 | size_t count, loff_t *ppos) | |
774 | { | |
775 | u64 __user *out = (u64 __user *)buf; | |
776 | struct page *ppage; | |
777 | unsigned long src = *ppos; | |
778 | unsigned long pfn; | |
779 | ssize_t ret = 0; | |
780 | u64 kflags, uflags; | |
781 | ||
782 | pfn = src / KPMSIZE; | |
783 | count = min_t(unsigned long, count, (max_pfn * KPMSIZE) - src); | |
784 | if (src & KPMMASK || count & KPMMASK) | |
785 | return -EIO; | |
786 | ||
787 | while (count > 0) { | |
788 | ppage = NULL; | |
789 | if (pfn_valid(pfn)) | |
790 | ppage = pfn_to_page(pfn); | |
791 | pfn++; | |
792 | if (!ppage) | |
793 | kflags = 0; | |
794 | else | |
795 | kflags = ppage->flags; | |
796 | ||
797 | uflags = kpf_copy_bit(KPF_LOCKED, PG_locked, kflags) | | |
798 | kpf_copy_bit(kflags, KPF_ERROR, PG_error) | | |
799 | kpf_copy_bit(kflags, KPF_REFERENCED, PG_referenced) | | |
800 | kpf_copy_bit(kflags, KPF_UPTODATE, PG_uptodate) | | |
801 | kpf_copy_bit(kflags, KPF_DIRTY, PG_dirty) | | |
802 | kpf_copy_bit(kflags, KPF_LRU, PG_lru) | | |
803 | kpf_copy_bit(kflags, KPF_ACTIVE, PG_active) | | |
804 | kpf_copy_bit(kflags, KPF_SLAB, PG_slab) | | |
805 | kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) | | |
806 | kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) | | |
807 | kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy); | |
808 | ||
809 | if (put_user(uflags, out++)) { | |
810 | ret = -EFAULT; | |
811 | break; | |
812 | } | |
813 | ||
814 | count -= KPMSIZE; | |
815 | } | |
816 | ||
817 | *ppos += (char __user *)out - buf; | |
818 | if (!ret) | |
819 | ret = (char __user *)out - buf; | |
820 | return ret; | |
821 | } | |
822 | ||
823 | static struct file_operations proc_kpageflags_operations = { | |
824 | .llseek = mem_lseek, | |
825 | .read = kpageflags_read, | |
826 | }; | |
1e883281 | 827 | #endif /* CONFIG_PROC_PAGE_MONITOR */ |
304daa81 | 828 | |
1da177e4 LT |
829 | struct proc_dir_entry *proc_root_kcore; |
830 | ||
1da177e4 LT |
831 | void __init proc_misc_init(void) |
832 | { | |
1da177e4 LT |
833 | static struct { |
834 | char *name; | |
835 | int (*read_proc)(char*,char**,off_t,int,int*,void*); | |
836 | } *p, simple_ones[] = { | |
837 | {"loadavg", loadavg_read_proc}, | |
838 | {"uptime", uptime_read_proc}, | |
839 | {"meminfo", meminfo_read_proc}, | |
840 | {"version", version_read_proc}, | |
841 | #ifdef CONFIG_PROC_HARDWARE | |
842 | {"hardware", hardware_read_proc}, | |
843 | #endif | |
844 | #ifdef CONFIG_STRAM_PROC | |
845 | {"stram", stram_read_proc}, | |
846 | #endif | |
1da177e4 LT |
847 | {"filesystems", filesystems_read_proc}, |
848 | {"cmdline", cmdline_read_proc}, | |
1da177e4 LT |
849 | {"execdomains", execdomains_read_proc}, |
850 | {NULL,} | |
851 | }; | |
852 | for (p = simple_ones; p->name; p++) | |
853 | create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL); | |
854 | ||
855 | proc_symlink("mounts", NULL, "self/mounts"); | |
856 | ||
857 | /* And now for trickier ones */ | |
c36264df | 858 | #ifdef CONFIG_PRINTK |
c74c120a | 859 | proc_create("kmsg", S_IRUSR, NULL, &proc_kmsg_operations); |
c36264df | 860 | #endif |
0d5c9f5f AD |
861 | proc_create("locks", 0, NULL, &proc_locks_operations); |
862 | proc_create("devices", 0, NULL, &proc_devinfo_operations); | |
863 | proc_create("cpuinfo", 0, NULL, &proc_cpuinfo_operations); | |
9361401e | 864 | #ifdef CONFIG_BLOCK |
0d5c9f5f | 865 | proc_create("partitions", 0, NULL, &proc_partitions_operations); |
9361401e | 866 | #endif |
0d5c9f5f AD |
867 | proc_create("stat", 0, NULL, &proc_stat_operations); |
868 | proc_create("interrupts", 0, NULL, &proc_interrupts_operations); | |
158a9624 | 869 | #ifdef CONFIG_SLABINFO |
0d5c9f5f | 870 | proc_create("slabinfo",S_IWUSR|S_IRUGO,NULL,&proc_slabinfo_operations); |
871751e2 | 871 | #ifdef CONFIG_DEBUG_SLAB_LEAK |
0d5c9f5f | 872 | proc_create("slab_allocators", 0, NULL, &proc_slabstats_operations); |
871751e2 | 873 | #endif |
a10aa579 CL |
874 | #endif |
875 | #ifdef CONFIG_MMU | |
876 | proc_create("vmallocinfo", S_IRUSR, NULL, &proc_vmalloc_operations); | |
10cef602 | 877 | #endif |
0d5c9f5f AD |
878 | proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations); |
879 | proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops); | |
880 | proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations); | |
881 | proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations); | |
9361401e | 882 | #ifdef CONFIG_BLOCK |
0d5c9f5f | 883 | proc_create("diskstats", 0, NULL, &proc_diskstats_operations); |
9361401e | 884 | #endif |
1da177e4 | 885 | #ifdef CONFIG_MODULES |
0d5c9f5f | 886 | proc_create("modules", 0, NULL, &proc_modules_operations); |
1da177e4 LT |
887 | #endif |
888 | #ifdef CONFIG_SCHEDSTATS | |
0d5c9f5f | 889 | proc_create("schedstat", 0, NULL, &proc_schedstat_operations); |
1da177e4 LT |
890 | #endif |
891 | #ifdef CONFIG_PROC_KCORE | |
0d5c9f5f AD |
892 | proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &proc_kcore_operations); |
893 | if (proc_root_kcore) | |
1da177e4 LT |
894 | proc_root_kcore->size = |
895 | (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE; | |
1da177e4 | 896 | #endif |
1e883281 | 897 | #ifdef CONFIG_PROC_PAGE_MONITOR |
0d5c9f5f AD |
898 | proc_create("kpagecount", S_IRUSR, NULL, &proc_kpagecount_operations); |
899 | proc_create("kpageflags", S_IRUSR, NULL, &proc_kpageflags_operations); | |
1e883281 | 900 | #endif |
666bfddb | 901 | #ifdef CONFIG_PROC_VMCORE |
0d5c9f5f | 902 | proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations); |
666bfddb | 903 | #endif |
1da177e4 | 904 | #ifdef CONFIG_MAGIC_SYSRQ |
0d5c9f5f | 905 | proc_create("sysrq-trigger", S_IWUSR, NULL, &proc_sysrq_trigger_operations); |
1da177e4 | 906 | #endif |
1da177e4 | 907 | } |