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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> | |
32 | #include <linux/swap.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/smp.h> | |
35 | #include <linux/signal.h> | |
36 | #include <linux/module.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/smp_lock.h> | |
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> |
1da177e4 LT |
50 | #include <asm/uaccess.h> |
51 | #include <asm/pgtable.h> | |
52 | #include <asm/io.h> | |
53 | #include <asm/tlb.h> | |
54 | #include <asm/div64.h> | |
55 | #include "internal.h" | |
56 | ||
57 | #define LOAD_INT(x) ((x) >> FSHIFT) | |
58 | #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) | |
59 | /* | |
60 | * Warning: stuff below (imported functions) assumes that its output will fit | |
61 | * into one page. For some of those functions it may be wrong. Moreover, we | |
62 | * have a way to deal with that gracefully. Right now I used straightforward | |
63 | * wrappers, but this needs further analysis wrt potential overflows. | |
64 | */ | |
65 | extern int get_hardware_list(char *); | |
66 | extern int get_stram_list(char *); | |
1da177e4 LT |
67 | extern int get_filesystem_list(char *); |
68 | extern int get_exec_domain_list(char *); | |
69 | extern int get_dma_list(char *); | |
70 | extern int get_locks_status (char *, char **, off_t, int); | |
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; | |
88 | ||
89 | a = avenrun[0] + (FIXED_1/200); | |
90 | b = avenrun[1] + (FIXED_1/200); | |
91 | c = avenrun[2] + (FIXED_1/200); | |
92 | len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n", | |
93 | LOAD_INT(a), LOAD_FRAC(a), | |
94 | LOAD_INT(b), LOAD_FRAC(b), | |
95 | LOAD_INT(c), LOAD_FRAC(c), | |
6cc1b22a | 96 | nr_running(), nr_threads, current->nsproxy->pid_ns->last_pid); |
1da177e4 LT |
97 | return proc_calc_metrics(page, start, off, count, eof, len); |
98 | } | |
99 | ||
100 | static int uptime_read_proc(char *page, char **start, off_t off, | |
101 | int count, int *eof, void *data) | |
102 | { | |
103 | struct timespec uptime; | |
104 | struct timespec idle; | |
105 | int len; | |
106 | cputime_t idletime = cputime_add(init_task.utime, init_task.stime); | |
107 | ||
108 | do_posix_clock_monotonic_gettime(&uptime); | |
109 | cputime_to_timespec(idletime, &idle); | |
110 | len = sprintf(page,"%lu.%02lu %lu.%02lu\n", | |
111 | (unsigned long) uptime.tv_sec, | |
112 | (uptime.tv_nsec / (NSEC_PER_SEC / 100)), | |
113 | (unsigned long) idle.tv_sec, | |
114 | (idle.tv_nsec / (NSEC_PER_SEC / 100))); | |
115 | ||
116 | return proc_calc_metrics(page, start, off, count, eof, len); | |
117 | } | |
118 | ||
119 | static int meminfo_read_proc(char *page, char **start, off_t off, | |
120 | int count, int *eof, void *data) | |
121 | { | |
122 | struct sysinfo i; | |
123 | int len; | |
1da177e4 LT |
124 | unsigned long inactive; |
125 | unsigned long active; | |
126 | unsigned long free; | |
127 | unsigned long committed; | |
128 | unsigned long allowed; | |
129 | struct vmalloc_info vmi; | |
4c4c402d | 130 | long cached; |
1da177e4 | 131 | |
1da177e4 LT |
132 | get_zone_counts(&active, &inactive, &free); |
133 | ||
134 | /* | |
135 | * display in kilobytes. | |
136 | */ | |
137 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
138 | si_meminfo(&i); | |
139 | si_swapinfo(&i); | |
140 | committed = atomic_read(&vm_committed_space); | |
141 | allowed = ((totalram_pages - hugetlb_total_pages()) | |
142 | * sysctl_overcommit_ratio / 100) + total_swap_pages; | |
143 | ||
347ce434 CL |
144 | cached = global_page_state(NR_FILE_PAGES) - |
145 | total_swapcache_pages - i.bufferram; | |
4c4c402d MH |
146 | if (cached < 0) |
147 | cached = 0; | |
148 | ||
1da177e4 LT |
149 | get_vmalloc_info(&vmi); |
150 | ||
151 | /* | |
152 | * Tagged format, for easy grepping and expansion. | |
153 | */ | |
154 | len = sprintf(page, | |
155 | "MemTotal: %8lu kB\n" | |
156 | "MemFree: %8lu kB\n" | |
157 | "Buffers: %8lu kB\n" | |
158 | "Cached: %8lu kB\n" | |
159 | "SwapCached: %8lu kB\n" | |
160 | "Active: %8lu kB\n" | |
161 | "Inactive: %8lu kB\n" | |
182e8e23 | 162 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
163 | "HighTotal: %8lu kB\n" |
164 | "HighFree: %8lu kB\n" | |
165 | "LowTotal: %8lu kB\n" | |
166 | "LowFree: %8lu kB\n" | |
182e8e23 | 167 | #endif |
1da177e4 LT |
168 | "SwapTotal: %8lu kB\n" |
169 | "SwapFree: %8lu kB\n" | |
170 | "Dirty: %8lu kB\n" | |
171 | "Writeback: %8lu kB\n" | |
f3dbd344 | 172 | "AnonPages: %8lu kB\n" |
1da177e4 LT |
173 | "Mapped: %8lu kB\n" |
174 | "Slab: %8lu kB\n" | |
972d1a7b CL |
175 | "SReclaimable: %8lu kB\n" |
176 | "SUnreclaim: %8lu kB\n" | |
df849a15 | 177 | "PageTables: %8lu kB\n" |
f5ef68da | 178 | "NFS_Unstable: %8lu kB\n" |
d2c5e30c | 179 | "Bounce: %8lu kB\n" |
1da177e4 LT |
180 | "CommitLimit: %8lu kB\n" |
181 | "Committed_AS: %8lu kB\n" | |
1da177e4 LT |
182 | "VmallocTotal: %8lu kB\n" |
183 | "VmallocUsed: %8lu kB\n" | |
184 | "VmallocChunk: %8lu kB\n", | |
185 | K(i.totalram), | |
186 | K(i.freeram), | |
187 | K(i.bufferram), | |
4c4c402d | 188 | K(cached), |
1da177e4 LT |
189 | K(total_swapcache_pages), |
190 | K(active), | |
191 | K(inactive), | |
182e8e23 | 192 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
193 | K(i.totalhigh), |
194 | K(i.freehigh), | |
195 | K(i.totalram-i.totalhigh), | |
196 | K(i.freeram-i.freehigh), | |
182e8e23 | 197 | #endif |
1da177e4 LT |
198 | K(i.totalswap), |
199 | K(i.freeswap), | |
b1e7a8fd | 200 | K(global_page_state(NR_FILE_DIRTY)), |
ce866b34 | 201 | K(global_page_state(NR_WRITEBACK)), |
f3dbd344 | 202 | K(global_page_state(NR_ANON_PAGES)), |
65ba55f5 | 203 | K(global_page_state(NR_FILE_MAPPED)), |
972d1a7b CL |
204 | K(global_page_state(NR_SLAB_RECLAIMABLE) + |
205 | global_page_state(NR_SLAB_UNRECLAIMABLE)), | |
206 | K(global_page_state(NR_SLAB_RECLAIMABLE)), | |
207 | K(global_page_state(NR_SLAB_UNRECLAIMABLE)), | |
df849a15 | 208 | K(global_page_state(NR_PAGETABLE)), |
fd39fc85 | 209 | K(global_page_state(NR_UNSTABLE_NFS)), |
d2c5e30c | 210 | K(global_page_state(NR_BOUNCE)), |
1da177e4 LT |
211 | K(allowed), |
212 | K(committed), | |
1da177e4 LT |
213 | (unsigned long)VMALLOC_TOTAL >> 10, |
214 | vmi.used >> 10, | |
215 | vmi.largest_chunk >> 10 | |
216 | ); | |
217 | ||
218 | len += hugetlb_report_meminfo(page + len); | |
219 | ||
220 | return proc_calc_metrics(page, start, off, count, eof, len); | |
221 | #undef K | |
222 | } | |
223 | ||
224 | extern struct seq_operations fragmentation_op; | |
225 | static int fragmentation_open(struct inode *inode, struct file *file) | |
226 | { | |
227 | (void)inode; | |
228 | return seq_open(file, &fragmentation_op); | |
229 | } | |
230 | ||
231 | static struct file_operations fragmentation_file_operations = { | |
232 | .open = fragmentation_open, | |
233 | .read = seq_read, | |
234 | .llseek = seq_lseek, | |
235 | .release = seq_release, | |
236 | }; | |
237 | ||
295ab934 ND |
238 | extern struct seq_operations zoneinfo_op; |
239 | static int zoneinfo_open(struct inode *inode, struct file *file) | |
240 | { | |
241 | return seq_open(file, &zoneinfo_op); | |
242 | } | |
243 | ||
244 | static struct file_operations proc_zoneinfo_file_operations = { | |
245 | .open = zoneinfo_open, | |
246 | .read = seq_read, | |
247 | .llseek = seq_lseek, | |
248 | .release = seq_release, | |
249 | }; | |
250 | ||
1da177e4 LT |
251 | static int version_read_proc(char *page, char **start, off_t off, |
252 | int count, int *eof, void *data) | |
253 | { | |
254 | int len; | |
255 | ||
3eb3c740 | 256 | len = snprintf(page, PAGE_SIZE, linux_proc_banner, |
8993780a LT |
257 | utsname()->sysname, |
258 | utsname()->release, | |
259 | utsname()->version); | |
1da177e4 LT |
260 | return proc_calc_metrics(page, start, off, count, eof, len); |
261 | } | |
262 | ||
263 | extern struct seq_operations cpuinfo_op; | |
264 | static int cpuinfo_open(struct inode *inode, struct file *file) | |
265 | { | |
266 | return seq_open(file, &cpuinfo_op); | |
267 | } | |
7170be5f | 268 | |
68eef3b4 JK |
269 | static struct file_operations proc_cpuinfo_operations = { |
270 | .open = cpuinfo_open, | |
271 | .read = seq_read, | |
272 | .llseek = seq_lseek, | |
273 | .release = seq_release, | |
7170be5f NH |
274 | }; |
275 | ||
68eef3b4 | 276 | static int devinfo_show(struct seq_file *f, void *v) |
7170be5f | 277 | { |
68eef3b4 JK |
278 | int i = *(loff_t *) v; |
279 | ||
280 | if (i < CHRDEV_MAJOR_HASH_SIZE) { | |
281 | if (i == 0) | |
282 | seq_printf(f, "Character devices:\n"); | |
283 | chrdev_show(f, i); | |
9361401e DH |
284 | } |
285 | #ifdef CONFIG_BLOCK | |
286 | else { | |
68eef3b4 JK |
287 | i -= CHRDEV_MAJOR_HASH_SIZE; |
288 | if (i == 0) | |
289 | seq_printf(f, "\nBlock devices:\n"); | |
290 | blkdev_show(f, i); | |
7170be5f | 291 | } |
9361401e | 292 | #endif |
68eef3b4 | 293 | return 0; |
7170be5f NH |
294 | } |
295 | ||
68eef3b4 | 296 | static void *devinfo_start(struct seq_file *f, loff_t *pos) |
7170be5f | 297 | { |
68eef3b4 JK |
298 | if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE)) |
299 | return pos; | |
300 | return NULL; | |
7170be5f NH |
301 | } |
302 | ||
68eef3b4 | 303 | static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos) |
7170be5f | 304 | { |
68eef3b4 JK |
305 | (*pos)++; |
306 | if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE)) | |
307 | return NULL; | |
308 | return pos; | |
7170be5f NH |
309 | } |
310 | ||
68eef3b4 | 311 | static void devinfo_stop(struct seq_file *f, void *v) |
7170be5f | 312 | { |
68eef3b4 | 313 | /* Nothing to do */ |
7170be5f NH |
314 | } |
315 | ||
68eef3b4 JK |
316 | static struct seq_operations devinfo_ops = { |
317 | .start = devinfo_start, | |
318 | .next = devinfo_next, | |
319 | .stop = devinfo_stop, | |
320 | .show = devinfo_show | |
7170be5f NH |
321 | }; |
322 | ||
68eef3b4 | 323 | static int devinfo_open(struct inode *inode, struct file *filp) |
7170be5f | 324 | { |
68eef3b4 | 325 | return seq_open(filp, &devinfo_ops); |
7170be5f NH |
326 | } |
327 | ||
328 | static struct file_operations proc_devinfo_operations = { | |
329 | .open = devinfo_open, | |
330 | .read = seq_read, | |
331 | .llseek = seq_lseek, | |
332 | .release = seq_release, | |
333 | }; | |
334 | ||
1da177e4 LT |
335 | extern struct seq_operations vmstat_op; |
336 | static int vmstat_open(struct inode *inode, struct file *file) | |
337 | { | |
338 | return seq_open(file, &vmstat_op); | |
339 | } | |
340 | static struct file_operations proc_vmstat_file_operations = { | |
341 | .open = vmstat_open, | |
342 | .read = seq_read, | |
343 | .llseek = seq_lseek, | |
344 | .release = seq_release, | |
345 | }; | |
346 | ||
347 | #ifdef CONFIG_PROC_HARDWARE | |
348 | static int hardware_read_proc(char *page, char **start, off_t off, | |
349 | int count, int *eof, void *data) | |
350 | { | |
351 | int len = get_hardware_list(page); | |
352 | return proc_calc_metrics(page, start, off, count, eof, len); | |
353 | } | |
354 | #endif | |
355 | ||
356 | #ifdef CONFIG_STRAM_PROC | |
357 | static int stram_read_proc(char *page, char **start, off_t off, | |
358 | int count, int *eof, void *data) | |
359 | { | |
360 | int len = get_stram_list(page); | |
361 | return proc_calc_metrics(page, start, off, count, eof, len); | |
362 | } | |
363 | #endif | |
364 | ||
9361401e | 365 | #ifdef CONFIG_BLOCK |
1da177e4 LT |
366 | extern struct seq_operations partitions_op; |
367 | static int partitions_open(struct inode *inode, struct file *file) | |
368 | { | |
369 | return seq_open(file, &partitions_op); | |
370 | } | |
371 | static struct file_operations proc_partitions_operations = { | |
372 | .open = partitions_open, | |
373 | .read = seq_read, | |
374 | .llseek = seq_lseek, | |
375 | .release = seq_release, | |
376 | }; | |
377 | ||
378 | extern struct seq_operations diskstats_op; | |
379 | static int diskstats_open(struct inode *inode, struct file *file) | |
380 | { | |
381 | return seq_open(file, &diskstats_op); | |
382 | } | |
383 | static struct file_operations proc_diskstats_operations = { | |
384 | .open = diskstats_open, | |
385 | .read = seq_read, | |
386 | .llseek = seq_lseek, | |
387 | .release = seq_release, | |
388 | }; | |
9361401e | 389 | #endif |
1da177e4 LT |
390 | |
391 | #ifdef CONFIG_MODULES | |
392 | extern struct seq_operations modules_op; | |
393 | static int modules_open(struct inode *inode, struct file *file) | |
394 | { | |
395 | return seq_open(file, &modules_op); | |
396 | } | |
397 | static struct file_operations proc_modules_operations = { | |
398 | .open = modules_open, | |
399 | .read = seq_read, | |
400 | .llseek = seq_lseek, | |
401 | .release = seq_release, | |
402 | }; | |
403 | #endif | |
404 | ||
10cef602 | 405 | #ifdef CONFIG_SLAB |
1da177e4 LT |
406 | extern struct seq_operations slabinfo_op; |
407 | extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *); | |
408 | static int slabinfo_open(struct inode *inode, struct file *file) | |
409 | { | |
410 | return seq_open(file, &slabinfo_op); | |
411 | } | |
412 | static struct file_operations proc_slabinfo_operations = { | |
413 | .open = slabinfo_open, | |
414 | .read = seq_read, | |
415 | .write = slabinfo_write, | |
416 | .llseek = seq_lseek, | |
417 | .release = seq_release, | |
418 | }; | |
871751e2 AV |
419 | |
420 | #ifdef CONFIG_DEBUG_SLAB_LEAK | |
421 | extern struct seq_operations slabstats_op; | |
422 | static int slabstats_open(struct inode *inode, struct file *file) | |
423 | { | |
424 | unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
425 | int ret = -ENOMEM; | |
426 | if (n) { | |
427 | ret = seq_open(file, &slabstats_op); | |
428 | if (!ret) { | |
429 | struct seq_file *m = file->private_data; | |
430 | *n = PAGE_SIZE / (2 * sizeof(unsigned long)); | |
431 | m->private = n; | |
432 | n = NULL; | |
433 | } | |
434 | kfree(n); | |
435 | } | |
436 | return ret; | |
437 | } | |
438 | ||
439 | static int slabstats_release(struct inode *inode, struct file *file) | |
440 | { | |
441 | struct seq_file *m = file->private_data; | |
442 | kfree(m->private); | |
443 | return seq_release(inode, file); | |
444 | } | |
445 | ||
446 | static struct file_operations proc_slabstats_operations = { | |
447 | .open = slabstats_open, | |
448 | .read = seq_read, | |
449 | .llseek = seq_lseek, | |
450 | .release = slabstats_release, | |
451 | }; | |
452 | #endif | |
10cef602 | 453 | #endif |
1da177e4 LT |
454 | |
455 | static int show_stat(struct seq_file *p, void *v) | |
456 | { | |
457 | int i; | |
458 | unsigned long jif; | |
459 | cputime64_t user, nice, system, idle, iowait, irq, softirq, steal; | |
460 | u64 sum = 0; | |
461 | ||
462 | user = nice = system = idle = iowait = | |
463 | irq = softirq = steal = cputime64_zero; | |
464 | jif = - wall_to_monotonic.tv_sec; | |
465 | if (wall_to_monotonic.tv_nsec) | |
466 | --jif; | |
467 | ||
0a945022 | 468 | for_each_possible_cpu(i) { |
1da177e4 LT |
469 | int j; |
470 | ||
471 | user = cputime64_add(user, kstat_cpu(i).cpustat.user); | |
472 | nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); | |
473 | system = cputime64_add(system, kstat_cpu(i).cpustat.system); | |
474 | idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); | |
475 | iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); | |
476 | irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); | |
477 | softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); | |
478 | steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); | |
479 | for (j = 0 ; j < NR_IRQS ; j++) | |
480 | sum += kstat_cpu(i).irqs[j]; | |
481 | } | |
482 | ||
483 | seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu\n", | |
484 | (unsigned long long)cputime64_to_clock_t(user), | |
485 | (unsigned long long)cputime64_to_clock_t(nice), | |
486 | (unsigned long long)cputime64_to_clock_t(system), | |
487 | (unsigned long long)cputime64_to_clock_t(idle), | |
488 | (unsigned long long)cputime64_to_clock_t(iowait), | |
489 | (unsigned long long)cputime64_to_clock_t(irq), | |
490 | (unsigned long long)cputime64_to_clock_t(softirq), | |
491 | (unsigned long long)cputime64_to_clock_t(steal)); | |
492 | for_each_online_cpu(i) { | |
493 | ||
494 | /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ | |
495 | user = kstat_cpu(i).cpustat.user; | |
496 | nice = kstat_cpu(i).cpustat.nice; | |
497 | system = kstat_cpu(i).cpustat.system; | |
498 | idle = kstat_cpu(i).cpustat.idle; | |
499 | iowait = kstat_cpu(i).cpustat.iowait; | |
500 | irq = kstat_cpu(i).cpustat.irq; | |
501 | softirq = kstat_cpu(i).cpustat.softirq; | |
502 | steal = kstat_cpu(i).cpustat.steal; | |
503 | seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n", | |
504 | i, | |
505 | (unsigned long long)cputime64_to_clock_t(user), | |
506 | (unsigned long long)cputime64_to_clock_t(nice), | |
507 | (unsigned long long)cputime64_to_clock_t(system), | |
508 | (unsigned long long)cputime64_to_clock_t(idle), | |
509 | (unsigned long long)cputime64_to_clock_t(iowait), | |
510 | (unsigned long long)cputime64_to_clock_t(irq), | |
511 | (unsigned long long)cputime64_to_clock_t(softirq), | |
512 | (unsigned long long)cputime64_to_clock_t(steal)); | |
513 | } | |
514 | seq_printf(p, "intr %llu", (unsigned long long)sum); | |
515 | ||
a1854611 | 516 | #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64) |
1da177e4 LT |
517 | for (i = 0; i < NR_IRQS; i++) |
518 | seq_printf(p, " %u", kstat_irqs(i)); | |
519 | #endif | |
520 | ||
521 | seq_printf(p, | |
522 | "\nctxt %llu\n" | |
523 | "btime %lu\n" | |
524 | "processes %lu\n" | |
525 | "procs_running %lu\n" | |
526 | "procs_blocked %lu\n", | |
527 | nr_context_switches(), | |
528 | (unsigned long)jif, | |
529 | total_forks, | |
530 | nr_running(), | |
531 | nr_iowait()); | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
536 | static int stat_open(struct inode *inode, struct file *file) | |
537 | { | |
538 | unsigned size = 4096 * (1 + num_possible_cpus() / 32); | |
539 | char *buf; | |
540 | struct seq_file *m; | |
541 | int res; | |
542 | ||
543 | /* don't ask for more than the kmalloc() max size, currently 128 KB */ | |
544 | if (size > 128 * 1024) | |
545 | size = 128 * 1024; | |
546 | buf = kmalloc(size, GFP_KERNEL); | |
547 | if (!buf) | |
548 | return -ENOMEM; | |
549 | ||
550 | res = single_open(file, show_stat, NULL); | |
551 | if (!res) { | |
552 | m = file->private_data; | |
553 | m->buf = buf; | |
554 | m->size = size; | |
555 | } else | |
556 | kfree(buf); | |
557 | return res; | |
558 | } | |
559 | static struct file_operations proc_stat_operations = { | |
560 | .open = stat_open, | |
561 | .read = seq_read, | |
562 | .llseek = seq_lseek, | |
563 | .release = single_release, | |
564 | }; | |
565 | ||
1da177e4 LT |
566 | /* |
567 | * /proc/interrupts | |
568 | */ | |
569 | static void *int_seq_start(struct seq_file *f, loff_t *pos) | |
570 | { | |
571 | return (*pos <= NR_IRQS) ? pos : NULL; | |
572 | } | |
573 | ||
574 | static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos) | |
575 | { | |
576 | (*pos)++; | |
577 | if (*pos > NR_IRQS) | |
578 | return NULL; | |
579 | return pos; | |
580 | } | |
581 | ||
582 | static void int_seq_stop(struct seq_file *f, void *v) | |
583 | { | |
584 | /* Nothing to do */ | |
585 | } | |
586 | ||
587 | ||
588 | extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */ | |
589 | static struct seq_operations int_seq_ops = { | |
590 | .start = int_seq_start, | |
591 | .next = int_seq_next, | |
592 | .stop = int_seq_stop, | |
593 | .show = show_interrupts | |
594 | }; | |
595 | ||
596 | static int interrupts_open(struct inode *inode, struct file *filp) | |
597 | { | |
598 | return seq_open(filp, &int_seq_ops); | |
599 | } | |
600 | ||
601 | static struct file_operations proc_interrupts_operations = { | |
602 | .open = interrupts_open, | |
603 | .read = seq_read, | |
604 | .llseek = seq_lseek, | |
605 | .release = seq_release, | |
606 | }; | |
607 | ||
608 | static int filesystems_read_proc(char *page, char **start, off_t off, | |
609 | int count, int *eof, void *data) | |
610 | { | |
611 | int len = get_filesystem_list(page); | |
612 | return proc_calc_metrics(page, start, off, count, eof, len); | |
613 | } | |
614 | ||
615 | static int cmdline_read_proc(char *page, char **start, off_t off, | |
616 | int count, int *eof, void *data) | |
617 | { | |
618 | int len; | |
619 | ||
620 | len = sprintf(page, "%s\n", saved_command_line); | |
621 | return proc_calc_metrics(page, start, off, count, eof, len); | |
622 | } | |
623 | ||
624 | static int locks_read_proc(char *page, char **start, off_t off, | |
625 | int count, int *eof, void *data) | |
626 | { | |
627 | int len = get_locks_status(page, start, off, count); | |
628 | ||
629 | if (len < count) | |
630 | *eof = 1; | |
631 | return len; | |
632 | } | |
633 | ||
634 | static int execdomains_read_proc(char *page, char **start, off_t off, | |
635 | int count, int *eof, void *data) | |
636 | { | |
637 | int len = get_exec_domain_list(page); | |
638 | return proc_calc_metrics(page, start, off, count, eof, len); | |
639 | } | |
640 | ||
641 | #ifdef CONFIG_MAGIC_SYSRQ | |
642 | /* | |
643 | * writing 'C' to /proc/sysrq-trigger is like sysrq-C | |
644 | */ | |
645 | static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf, | |
646 | size_t count, loff_t *ppos) | |
647 | { | |
648 | if (count) { | |
649 | char c; | |
650 | ||
651 | if (get_user(c, buf)) | |
652 | return -EFAULT; | |
7d12e780 | 653 | __handle_sysrq(c, NULL, 0); |
1da177e4 LT |
654 | } |
655 | return count; | |
656 | } | |
657 | ||
658 | static struct file_operations proc_sysrq_trigger_operations = { | |
659 | .write = write_sysrq_trigger, | |
660 | }; | |
661 | #endif | |
662 | ||
663 | struct proc_dir_entry *proc_root_kcore; | |
664 | ||
99ac48f5 | 665 | void create_seq_entry(char *name, mode_t mode, const struct file_operations *f) |
1da177e4 LT |
666 | { |
667 | struct proc_dir_entry *entry; | |
668 | entry = create_proc_entry(name, mode, NULL); | |
669 | if (entry) | |
670 | entry->proc_fops = f; | |
671 | } | |
672 | ||
673 | void __init proc_misc_init(void) | |
674 | { | |
675 | struct proc_dir_entry *entry; | |
676 | static struct { | |
677 | char *name; | |
678 | int (*read_proc)(char*,char**,off_t,int,int*,void*); | |
679 | } *p, simple_ones[] = { | |
680 | {"loadavg", loadavg_read_proc}, | |
681 | {"uptime", uptime_read_proc}, | |
682 | {"meminfo", meminfo_read_proc}, | |
683 | {"version", version_read_proc}, | |
684 | #ifdef CONFIG_PROC_HARDWARE | |
685 | {"hardware", hardware_read_proc}, | |
686 | #endif | |
687 | #ifdef CONFIG_STRAM_PROC | |
688 | {"stram", stram_read_proc}, | |
689 | #endif | |
1da177e4 LT |
690 | {"filesystems", filesystems_read_proc}, |
691 | {"cmdline", cmdline_read_proc}, | |
692 | {"locks", locks_read_proc}, | |
693 | {"execdomains", execdomains_read_proc}, | |
694 | {NULL,} | |
695 | }; | |
696 | for (p = simple_ones; p->name; p++) | |
697 | create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL); | |
698 | ||
699 | proc_symlink("mounts", NULL, "self/mounts"); | |
700 | ||
701 | /* And now for trickier ones */ | |
c36264df | 702 | #ifdef CONFIG_PRINTK |
1da177e4 LT |
703 | entry = create_proc_entry("kmsg", S_IRUSR, &proc_root); |
704 | if (entry) | |
705 | entry->proc_fops = &proc_kmsg_operations; | |
c36264df | 706 | #endif |
7170be5f | 707 | create_seq_entry("devices", 0, &proc_devinfo_operations); |
1da177e4 | 708 | create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations); |
9361401e | 709 | #ifdef CONFIG_BLOCK |
1da177e4 | 710 | create_seq_entry("partitions", 0, &proc_partitions_operations); |
9361401e | 711 | #endif |
1da177e4 LT |
712 | create_seq_entry("stat", 0, &proc_stat_operations); |
713 | create_seq_entry("interrupts", 0, &proc_interrupts_operations); | |
10cef602 | 714 | #ifdef CONFIG_SLAB |
1da177e4 | 715 | create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations); |
871751e2 AV |
716 | #ifdef CONFIG_DEBUG_SLAB_LEAK |
717 | create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations); | |
718 | #endif | |
10cef602 | 719 | #endif |
1da177e4 LT |
720 | create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations); |
721 | create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations); | |
295ab934 | 722 | create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations); |
9361401e | 723 | #ifdef CONFIG_BLOCK |
1da177e4 | 724 | create_seq_entry("diskstats", 0, &proc_diskstats_operations); |
9361401e | 725 | #endif |
1da177e4 LT |
726 | #ifdef CONFIG_MODULES |
727 | create_seq_entry("modules", 0, &proc_modules_operations); | |
728 | #endif | |
729 | #ifdef CONFIG_SCHEDSTATS | |
730 | create_seq_entry("schedstat", 0, &proc_schedstat_operations); | |
731 | #endif | |
732 | #ifdef CONFIG_PROC_KCORE | |
733 | proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL); | |
734 | if (proc_root_kcore) { | |
735 | proc_root_kcore->proc_fops = &proc_kcore_operations; | |
736 | proc_root_kcore->size = | |
737 | (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE; | |
738 | } | |
739 | #endif | |
666bfddb VG |
740 | #ifdef CONFIG_PROC_VMCORE |
741 | proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL); | |
742 | if (proc_vmcore) | |
743 | proc_vmcore->proc_fops = &proc_vmcore_operations; | |
744 | #endif | |
1da177e4 LT |
745 | #ifdef CONFIG_MAGIC_SYSRQ |
746 | entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL); | |
747 | if (entry) | |
748 | entry->proc_fops = &proc_sysrq_trigger_operations; | |
749 | #endif | |
1da177e4 | 750 | } |