| 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> |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/tty.h> |
| 25 | #include <linux/string.h> |
| 26 | #include <linux/mman.h> |
| 27 | #include <linux/quicklist.h> |
| 28 | #include <linux/proc_fs.h> |
| 29 | #include <linux/ioport.h> |
| 30 | #include <linux/mm.h> |
| 31 | #include <linux/mmzone.h> |
| 32 | #include <linux/pagemap.h> |
| 33 | #include <linux/irq.h> |
| 34 | #include <linux/interrupt.h> |
| 35 | #include <linux/swap.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/genhd.h> |
| 38 | #include <linux/smp.h> |
| 39 | #include <linux/signal.h> |
| 40 | #include <linux/module.h> |
| 41 | #include <linux/init.h> |
| 42 | #include <linux/seq_file.h> |
| 43 | #include <linux/times.h> |
| 44 | #include <linux/profile.h> |
| 45 | #include <linux/utsname.h> |
| 46 | #include <linux/blkdev.h> |
| 47 | #include <linux/hugetlb.h> |
| 48 | #include <linux/jiffies.h> |
| 49 | #include <linux/sysrq.h> |
| 50 | #include <linux/vmalloc.h> |
| 51 | #include <linux/crash_dump.h> |
| 52 | #include <linux/pid_namespace.h> |
| 53 | #include <linux/bootmem.h> |
| 54 | #include <asm/uaccess.h> |
| 55 | #include <asm/pgtable.h> |
| 56 | #include <asm/io.h> |
| 57 | #include <asm/tlb.h> |
| 58 | #include <asm/div64.h> |
| 59 | #include "internal.h" |
| 60 | |
| 61 | #define LOAD_INT(x) ((x) >> FSHIFT) |
| 62 | #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) |
| 63 | /* |
| 64 | * Warning: stuff below (imported functions) assumes that its output will fit |
| 65 | * into one page. For some of those functions it may be wrong. Moreover, we |
| 66 | * have a way to deal with that gracefully. Right now I used straightforward |
| 67 | * wrappers, but this needs further analysis wrt potential overflows. |
| 68 | */ |
| 69 | extern int get_hardware_list(char *); |
| 70 | extern int get_stram_list(char *); |
| 71 | extern int get_exec_domain_list(char *); |
| 72 | |
| 73 | static int proc_calc_metrics(char *page, char **start, off_t off, |
| 74 | int count, int *eof, int len) |
| 75 | { |
| 76 | if (len <= off+count) *eof = 1; |
| 77 | *start = page + off; |
| 78 | len -= off; |
| 79 | if (len>count) len = count; |
| 80 | if (len<0) len = 0; |
| 81 | return len; |
| 82 | } |
| 83 | |
| 84 | static int loadavg_read_proc(char *page, char **start, off_t off, |
| 85 | int count, int *eof, void *data) |
| 86 | { |
| 87 | int a, b, c; |
| 88 | int len; |
| 89 | unsigned long seq; |
| 90 | |
| 91 | do { |
| 92 | seq = read_seqbegin(&xtime_lock); |
| 93 | a = avenrun[0] + (FIXED_1/200); |
| 94 | b = avenrun[1] + (FIXED_1/200); |
| 95 | c = avenrun[2] + (FIXED_1/200); |
| 96 | } while (read_seqretry(&xtime_lock, seq)); |
| 97 | |
| 98 | len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n", |
| 99 | LOAD_INT(a), LOAD_FRAC(a), |
| 100 | LOAD_INT(b), LOAD_FRAC(b), |
| 101 | LOAD_INT(c), LOAD_FRAC(c), |
| 102 | nr_running(), nr_threads, |
| 103 | task_active_pid_ns(current)->last_pid); |
| 104 | return proc_calc_metrics(page, start, off, count, eof, len); |
| 105 | } |
| 106 | |
| 107 | static int uptime_read_proc(char *page, char **start, off_t off, |
| 108 | int count, int *eof, void *data) |
| 109 | { |
| 110 | struct timespec uptime; |
| 111 | struct timespec idle; |
| 112 | int len; |
| 113 | cputime_t idletime = cputime_add(init_task.utime, init_task.stime); |
| 114 | |
| 115 | do_posix_clock_monotonic_gettime(&uptime); |
| 116 | monotonic_to_bootbased(&uptime); |
| 117 | cputime_to_timespec(idletime, &idle); |
| 118 | len = sprintf(page,"%lu.%02lu %lu.%02lu\n", |
| 119 | (unsigned long) uptime.tv_sec, |
| 120 | (uptime.tv_nsec / (NSEC_PER_SEC / 100)), |
| 121 | (unsigned long) idle.tv_sec, |
| 122 | (idle.tv_nsec / (NSEC_PER_SEC / 100))); |
| 123 | |
| 124 | return proc_calc_metrics(page, start, off, count, eof, len); |
| 125 | } |
| 126 | |
| 127 | int __attribute__((weak)) arch_report_meminfo(char *page) |
| 128 | { |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | static int meminfo_read_proc(char *page, char **start, off_t off, |
| 133 | int count, int *eof, void *data) |
| 134 | { |
| 135 | struct sysinfo i; |
| 136 | int len; |
| 137 | unsigned long committed; |
| 138 | unsigned long allowed; |
| 139 | struct vmalloc_info vmi; |
| 140 | long cached; |
| 141 | |
| 142 | /* |
| 143 | * display in kilobytes. |
| 144 | */ |
| 145 | #define K(x) ((x) << (PAGE_SHIFT - 10)) |
| 146 | si_meminfo(&i); |
| 147 | si_swapinfo(&i); |
| 148 | committed = atomic_long_read(&vm_committed_space); |
| 149 | allowed = ((totalram_pages - hugetlb_total_pages()) |
| 150 | * sysctl_overcommit_ratio / 100) + total_swap_pages; |
| 151 | |
| 152 | cached = global_page_state(NR_FILE_PAGES) - |
| 153 | total_swapcache_pages - i.bufferram; |
| 154 | if (cached < 0) |
| 155 | cached = 0; |
| 156 | |
| 157 | get_vmalloc_info(&vmi); |
| 158 | |
| 159 | /* |
| 160 | * Tagged format, for easy grepping and expansion. |
| 161 | */ |
| 162 | len = sprintf(page, |
| 163 | "MemTotal: %8lu kB\n" |
| 164 | "MemFree: %8lu kB\n" |
| 165 | "Buffers: %8lu kB\n" |
| 166 | "Cached: %8lu kB\n" |
| 167 | "SwapCached: %8lu kB\n" |
| 168 | "Active: %8lu kB\n" |
| 169 | "Inactive: %8lu kB\n" |
| 170 | #ifdef CONFIG_HIGHMEM |
| 171 | "HighTotal: %8lu kB\n" |
| 172 | "HighFree: %8lu kB\n" |
| 173 | "LowTotal: %8lu kB\n" |
| 174 | "LowFree: %8lu kB\n" |
| 175 | #endif |
| 176 | "SwapTotal: %8lu kB\n" |
| 177 | "SwapFree: %8lu kB\n" |
| 178 | "Dirty: %8lu kB\n" |
| 179 | "Writeback: %8lu kB\n" |
| 180 | "AnonPages: %8lu kB\n" |
| 181 | "Mapped: %8lu kB\n" |
| 182 | "Slab: %8lu kB\n" |
| 183 | "SReclaimable: %8lu kB\n" |
| 184 | "SUnreclaim: %8lu kB\n" |
| 185 | "PageTables: %8lu kB\n" |
| 186 | #ifdef CONFIG_QUICKLIST |
| 187 | "Quicklists: %8lu kB\n" |
| 188 | #endif |
| 189 | "NFS_Unstable: %8lu kB\n" |
| 190 | "Bounce: %8lu kB\n" |
| 191 | "WritebackTmp: %8lu kB\n" |
| 192 | "CommitLimit: %8lu kB\n" |
| 193 | "Committed_AS: %8lu kB\n" |
| 194 | "VmallocTotal: %8lu kB\n" |
| 195 | "VmallocUsed: %8lu kB\n" |
| 196 | "VmallocChunk: %8lu kB\n", |
| 197 | K(i.totalram), |
| 198 | K(i.freeram), |
| 199 | K(i.bufferram), |
| 200 | K(cached), |
| 201 | K(total_swapcache_pages), |
| 202 | K(global_page_state(NR_ACTIVE)), |
| 203 | K(global_page_state(NR_INACTIVE)), |
| 204 | #ifdef CONFIG_HIGHMEM |
| 205 | K(i.totalhigh), |
| 206 | K(i.freehigh), |
| 207 | K(i.totalram-i.totalhigh), |
| 208 | K(i.freeram-i.freehigh), |
| 209 | #endif |
| 210 | K(i.totalswap), |
| 211 | K(i.freeswap), |
| 212 | K(global_page_state(NR_FILE_DIRTY)), |
| 213 | K(global_page_state(NR_WRITEBACK)), |
| 214 | K(global_page_state(NR_ANON_PAGES)), |
| 215 | K(global_page_state(NR_FILE_MAPPED)), |
| 216 | K(global_page_state(NR_SLAB_RECLAIMABLE) + |
| 217 | global_page_state(NR_SLAB_UNRECLAIMABLE)), |
| 218 | K(global_page_state(NR_SLAB_RECLAIMABLE)), |
| 219 | K(global_page_state(NR_SLAB_UNRECLAIMABLE)), |
| 220 | K(global_page_state(NR_PAGETABLE)), |
| 221 | #ifdef CONFIG_QUICKLIST |
| 222 | K(quicklist_total_size()), |
| 223 | #endif |
| 224 | K(global_page_state(NR_UNSTABLE_NFS)), |
| 225 | K(global_page_state(NR_BOUNCE)), |
| 226 | K(global_page_state(NR_WRITEBACK_TEMP)), |
| 227 | K(allowed), |
| 228 | K(committed), |
| 229 | (unsigned long)VMALLOC_TOTAL >> 10, |
| 230 | vmi.used >> 10, |
| 231 | vmi.largest_chunk >> 10 |
| 232 | ); |
| 233 | |
| 234 | len += hugetlb_report_meminfo(page + len); |
| 235 | |
| 236 | len += arch_report_meminfo(page + len); |
| 237 | |
| 238 | return proc_calc_metrics(page, start, off, count, eof, len); |
| 239 | #undef K |
| 240 | } |
| 241 | |
| 242 | static int fragmentation_open(struct inode *inode, struct file *file) |
| 243 | { |
| 244 | (void)inode; |
| 245 | return seq_open(file, &fragmentation_op); |
| 246 | } |
| 247 | |
| 248 | static const struct file_operations fragmentation_file_operations = { |
| 249 | .open = fragmentation_open, |
| 250 | .read = seq_read, |
| 251 | .llseek = seq_lseek, |
| 252 | .release = seq_release, |
| 253 | }; |
| 254 | |
| 255 | static int pagetypeinfo_open(struct inode *inode, struct file *file) |
| 256 | { |
| 257 | return seq_open(file, &pagetypeinfo_op); |
| 258 | } |
| 259 | |
| 260 | static const struct file_operations pagetypeinfo_file_ops = { |
| 261 | .open = pagetypeinfo_open, |
| 262 | .read = seq_read, |
| 263 | .llseek = seq_lseek, |
| 264 | .release = seq_release, |
| 265 | }; |
| 266 | |
| 267 | static int zoneinfo_open(struct inode *inode, struct file *file) |
| 268 | { |
| 269 | return seq_open(file, &zoneinfo_op); |
| 270 | } |
| 271 | |
| 272 | static const struct file_operations proc_zoneinfo_file_operations = { |
| 273 | .open = zoneinfo_open, |
| 274 | .read = seq_read, |
| 275 | .llseek = seq_lseek, |
| 276 | .release = seq_release, |
| 277 | }; |
| 278 | |
| 279 | static int version_read_proc(char *page, char **start, off_t off, |
| 280 | int count, int *eof, void *data) |
| 281 | { |
| 282 | int len; |
| 283 | |
| 284 | len = snprintf(page, PAGE_SIZE, linux_proc_banner, |
| 285 | utsname()->sysname, |
| 286 | utsname()->release, |
| 287 | utsname()->version); |
| 288 | return proc_calc_metrics(page, start, off, count, eof, len); |
| 289 | } |
| 290 | |
| 291 | extern const struct seq_operations cpuinfo_op; |
| 292 | static int cpuinfo_open(struct inode *inode, struct file *file) |
| 293 | { |
| 294 | return seq_open(file, &cpuinfo_op); |
| 295 | } |
| 296 | |
| 297 | static const struct file_operations proc_cpuinfo_operations = { |
| 298 | .open = cpuinfo_open, |
| 299 | .read = seq_read, |
| 300 | .llseek = seq_lseek, |
| 301 | .release = seq_release, |
| 302 | }; |
| 303 | |
| 304 | static int devinfo_show(struct seq_file *f, void *v) |
| 305 | { |
| 306 | int i = *(loff_t *) v; |
| 307 | |
| 308 | if (i < CHRDEV_MAJOR_HASH_SIZE) { |
| 309 | if (i == 0) |
| 310 | seq_printf(f, "Character devices:\n"); |
| 311 | chrdev_show(f, i); |
| 312 | } |
| 313 | #ifdef CONFIG_BLOCK |
| 314 | else { |
| 315 | i -= CHRDEV_MAJOR_HASH_SIZE; |
| 316 | if (i == 0) |
| 317 | seq_printf(f, "\nBlock devices:\n"); |
| 318 | blkdev_show(f, i); |
| 319 | } |
| 320 | #endif |
| 321 | return 0; |
| 322 | } |
| 323 | |
| 324 | static void *devinfo_start(struct seq_file *f, loff_t *pos) |
| 325 | { |
| 326 | if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE)) |
| 327 | return pos; |
| 328 | return NULL; |
| 329 | } |
| 330 | |
| 331 | static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos) |
| 332 | { |
| 333 | (*pos)++; |
| 334 | if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE)) |
| 335 | return NULL; |
| 336 | return pos; |
| 337 | } |
| 338 | |
| 339 | static void devinfo_stop(struct seq_file *f, void *v) |
| 340 | { |
| 341 | /* Nothing to do */ |
| 342 | } |
| 343 | |
| 344 | static const struct seq_operations devinfo_ops = { |
| 345 | .start = devinfo_start, |
| 346 | .next = devinfo_next, |
| 347 | .stop = devinfo_stop, |
| 348 | .show = devinfo_show |
| 349 | }; |
| 350 | |
| 351 | static int devinfo_open(struct inode *inode, struct file *filp) |
| 352 | { |
| 353 | return seq_open(filp, &devinfo_ops); |
| 354 | } |
| 355 | |
| 356 | static const struct file_operations proc_devinfo_operations = { |
| 357 | .open = devinfo_open, |
| 358 | .read = seq_read, |
| 359 | .llseek = seq_lseek, |
| 360 | .release = seq_release, |
| 361 | }; |
| 362 | |
| 363 | static int vmstat_open(struct inode *inode, struct file *file) |
| 364 | { |
| 365 | return seq_open(file, &vmstat_op); |
| 366 | } |
| 367 | static const struct file_operations proc_vmstat_file_operations = { |
| 368 | .open = vmstat_open, |
| 369 | .read = seq_read, |
| 370 | .llseek = seq_lseek, |
| 371 | .release = seq_release, |
| 372 | }; |
| 373 | |
| 374 | #ifdef CONFIG_PROC_HARDWARE |
| 375 | static int hardware_read_proc(char *page, char **start, off_t off, |
| 376 | int count, int *eof, void *data) |
| 377 | { |
| 378 | int len = get_hardware_list(page); |
| 379 | return proc_calc_metrics(page, start, off, count, eof, len); |
| 380 | } |
| 381 | #endif |
| 382 | |
| 383 | #ifdef CONFIG_STRAM_PROC |
| 384 | static int stram_read_proc(char *page, char **start, off_t off, |
| 385 | int count, int *eof, void *data) |
| 386 | { |
| 387 | int len = get_stram_list(page); |
| 388 | return proc_calc_metrics(page, start, off, count, eof, len); |
| 389 | } |
| 390 | #endif |
| 391 | |
| 392 | #ifdef CONFIG_BLOCK |
| 393 | static int partitions_open(struct inode *inode, struct file *file) |
| 394 | { |
| 395 | return seq_open(file, &partitions_op); |
| 396 | } |
| 397 | static const struct file_operations proc_partitions_operations = { |
| 398 | .open = partitions_open, |
| 399 | .read = seq_read, |
| 400 | .llseek = seq_lseek, |
| 401 | .release = seq_release, |
| 402 | }; |
| 403 | |
| 404 | static int diskstats_open(struct inode *inode, struct file *file) |
| 405 | { |
| 406 | return seq_open(file, &diskstats_op); |
| 407 | } |
| 408 | static const struct file_operations proc_diskstats_operations = { |
| 409 | .open = diskstats_open, |
| 410 | .read = seq_read, |
| 411 | .llseek = seq_lseek, |
| 412 | .release = seq_release, |
| 413 | }; |
| 414 | #endif |
| 415 | |
| 416 | #ifdef CONFIG_MODULES |
| 417 | extern const struct seq_operations modules_op; |
| 418 | static int modules_open(struct inode *inode, struct file *file) |
| 419 | { |
| 420 | return seq_open(file, &modules_op); |
| 421 | } |
| 422 | static const struct file_operations proc_modules_operations = { |
| 423 | .open = modules_open, |
| 424 | .read = seq_read, |
| 425 | .llseek = seq_lseek, |
| 426 | .release = seq_release, |
| 427 | }; |
| 428 | #endif |
| 429 | |
| 430 | #ifdef CONFIG_SLABINFO |
| 431 | static int slabinfo_open(struct inode *inode, struct file *file) |
| 432 | { |
| 433 | return seq_open(file, &slabinfo_op); |
| 434 | } |
| 435 | static const struct file_operations proc_slabinfo_operations = { |
| 436 | .open = slabinfo_open, |
| 437 | .read = seq_read, |
| 438 | .write = slabinfo_write, |
| 439 | .llseek = seq_lseek, |
| 440 | .release = seq_release, |
| 441 | }; |
| 442 | |
| 443 | #ifdef CONFIG_DEBUG_SLAB_LEAK |
| 444 | extern const struct seq_operations slabstats_op; |
| 445 | static int slabstats_open(struct inode *inode, struct file *file) |
| 446 | { |
| 447 | unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL); |
| 448 | int ret = -ENOMEM; |
| 449 | if (n) { |
| 450 | ret = seq_open(file, &slabstats_op); |
| 451 | if (!ret) { |
| 452 | struct seq_file *m = file->private_data; |
| 453 | *n = PAGE_SIZE / (2 * sizeof(unsigned long)); |
| 454 | m->private = n; |
| 455 | n = NULL; |
| 456 | } |
| 457 | kfree(n); |
| 458 | } |
| 459 | return ret; |
| 460 | } |
| 461 | |
| 462 | static const struct file_operations proc_slabstats_operations = { |
| 463 | .open = slabstats_open, |
| 464 | .read = seq_read, |
| 465 | .llseek = seq_lseek, |
| 466 | .release = seq_release_private, |
| 467 | }; |
| 468 | #endif |
| 469 | #endif |
| 470 | |
| 471 | #ifdef CONFIG_MMU |
| 472 | static int vmalloc_open(struct inode *inode, struct file *file) |
| 473 | { |
| 474 | unsigned int *ptr = NULL; |
| 475 | int ret; |
| 476 | |
| 477 | if (NUMA_BUILD) |
| 478 | ptr = kmalloc(nr_node_ids * sizeof(unsigned int), GFP_KERNEL); |
| 479 | ret = seq_open(file, &vmalloc_op); |
| 480 | if (!ret) { |
| 481 | struct seq_file *m = file->private_data; |
| 482 | m->private = ptr; |
| 483 | } else |
| 484 | kfree(ptr); |
| 485 | return ret; |
| 486 | } |
| 487 | |
| 488 | static const struct file_operations proc_vmalloc_operations = { |
| 489 | .open = vmalloc_open, |
| 490 | .read = seq_read, |
| 491 | .llseek = seq_lseek, |
| 492 | .release = seq_release_private, |
| 493 | }; |
| 494 | #endif |
| 495 | |
| 496 | #ifndef arch_irq_stat_cpu |
| 497 | #define arch_irq_stat_cpu(cpu) 0 |
| 498 | #endif |
| 499 | #ifndef arch_irq_stat |
| 500 | #define arch_irq_stat() 0 |
| 501 | #endif |
| 502 | |
| 503 | static int show_stat(struct seq_file *p, void *v) |
| 504 | { |
| 505 | int i, j; |
| 506 | unsigned long jif; |
| 507 | cputime64_t user, nice, system, idle, iowait, irq, softirq, steal; |
| 508 | cputime64_t guest; |
| 509 | u64 sum = 0; |
| 510 | struct timespec boottime; |
| 511 | unsigned int per_irq_sum; |
| 512 | #ifdef CONFIG_GENERIC_HARDIRQS |
| 513 | struct irq_desc *desc; |
| 514 | #endif |
| 515 | |
| 516 | user = nice = system = idle = iowait = |
| 517 | irq = softirq = steal = cputime64_zero; |
| 518 | guest = cputime64_zero; |
| 519 | getboottime(&boottime); |
| 520 | jif = boottime.tv_sec; |
| 521 | |
| 522 | for_each_possible_cpu(i) { |
| 523 | user = cputime64_add(user, kstat_cpu(i).cpustat.user); |
| 524 | nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); |
| 525 | system = cputime64_add(system, kstat_cpu(i).cpustat.system); |
| 526 | idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); |
| 527 | iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); |
| 528 | irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); |
| 529 | softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); |
| 530 | steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); |
| 531 | guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest); |
| 532 | for_each_irq_desc(j, desc) |
| 533 | { |
| 534 | unsigned int temp; |
| 535 | |
| 536 | temp = kstat_irqs_cpu(j, i); |
| 537 | sum += temp; |
| 538 | } |
| 539 | sum += arch_irq_stat_cpu(i); |
| 540 | } |
| 541 | sum += arch_irq_stat(); |
| 542 | |
| 543 | seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", |
| 544 | (unsigned long long)cputime64_to_clock_t(user), |
| 545 | (unsigned long long)cputime64_to_clock_t(nice), |
| 546 | (unsigned long long)cputime64_to_clock_t(system), |
| 547 | (unsigned long long)cputime64_to_clock_t(idle), |
| 548 | (unsigned long long)cputime64_to_clock_t(iowait), |
| 549 | (unsigned long long)cputime64_to_clock_t(irq), |
| 550 | (unsigned long long)cputime64_to_clock_t(softirq), |
| 551 | (unsigned long long)cputime64_to_clock_t(steal), |
| 552 | (unsigned long long)cputime64_to_clock_t(guest)); |
| 553 | for_each_online_cpu(i) { |
| 554 | |
| 555 | /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ |
| 556 | user = kstat_cpu(i).cpustat.user; |
| 557 | nice = kstat_cpu(i).cpustat.nice; |
| 558 | system = kstat_cpu(i).cpustat.system; |
| 559 | idle = kstat_cpu(i).cpustat.idle; |
| 560 | iowait = kstat_cpu(i).cpustat.iowait; |
| 561 | irq = kstat_cpu(i).cpustat.irq; |
| 562 | softirq = kstat_cpu(i).cpustat.softirq; |
| 563 | steal = kstat_cpu(i).cpustat.steal; |
| 564 | guest = kstat_cpu(i).cpustat.guest; |
| 565 | seq_printf(p, |
| 566 | "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", |
| 567 | i, |
| 568 | (unsigned long long)cputime64_to_clock_t(user), |
| 569 | (unsigned long long)cputime64_to_clock_t(nice), |
| 570 | (unsigned long long)cputime64_to_clock_t(system), |
| 571 | (unsigned long long)cputime64_to_clock_t(idle), |
| 572 | (unsigned long long)cputime64_to_clock_t(iowait), |
| 573 | (unsigned long long)cputime64_to_clock_t(irq), |
| 574 | (unsigned long long)cputime64_to_clock_t(softirq), |
| 575 | (unsigned long long)cputime64_to_clock_t(steal), |
| 576 | (unsigned long long)cputime64_to_clock_t(guest)); |
| 577 | } |
| 578 | seq_printf(p, "intr %llu", (unsigned long long)sum); |
| 579 | |
| 580 | /* sum again ? it could be updated? */ |
| 581 | for_each_irq_desc(j, desc) |
| 582 | { |
| 583 | per_irq_sum = 0; |
| 584 | for_each_possible_cpu(i) { |
| 585 | unsigned int temp; |
| 586 | |
| 587 | temp = kstat_irqs_cpu(j, i); |
| 588 | per_irq_sum += temp; |
| 589 | } |
| 590 | |
| 591 | #ifdef CONFIG_HAVE_SPARSE_IRQ |
| 592 | seq_printf(p, " %u:%u", j, per_irq_sum); |
| 593 | #else |
| 594 | seq_printf(p, " %u", per_irq_sum); |
| 595 | #endif |
| 596 | } |
| 597 | |
| 598 | seq_printf(p, |
| 599 | "\nctxt %llu\n" |
| 600 | "btime %lu\n" |
| 601 | "processes %lu\n" |
| 602 | "procs_running %lu\n" |
| 603 | "procs_blocked %lu\n", |
| 604 | nr_context_switches(), |
| 605 | (unsigned long)jif, |
| 606 | total_forks, |
| 607 | nr_running(), |
| 608 | nr_iowait()); |
| 609 | |
| 610 | return 0; |
| 611 | } |
| 612 | |
| 613 | static int stat_open(struct inode *inode, struct file *file) |
| 614 | { |
| 615 | unsigned size = 4096 * (1 + num_possible_cpus() / 32); |
| 616 | char *buf; |
| 617 | struct seq_file *m; |
| 618 | int res; |
| 619 | |
| 620 | /* don't ask for more than the kmalloc() max size, currently 128 KB */ |
| 621 | if (size > 128 * 1024) |
| 622 | size = 128 * 1024; |
| 623 | buf = kmalloc(size, GFP_KERNEL); |
| 624 | if (!buf) |
| 625 | return -ENOMEM; |
| 626 | |
| 627 | res = single_open(file, show_stat, NULL); |
| 628 | if (!res) { |
| 629 | m = file->private_data; |
| 630 | m->buf = buf; |
| 631 | m->size = size; |
| 632 | } else |
| 633 | kfree(buf); |
| 634 | return res; |
| 635 | } |
| 636 | static const struct file_operations proc_stat_operations = { |
| 637 | .open = stat_open, |
| 638 | .read = seq_read, |
| 639 | .llseek = seq_lseek, |
| 640 | .release = single_release, |
| 641 | }; |
| 642 | |
| 643 | /* |
| 644 | * /proc/interrupts |
| 645 | */ |
| 646 | static void *int_seq_start(struct seq_file *f, loff_t *pos) |
| 647 | { |
| 648 | #ifdef CONFIG_HAVE_SPARSE_IRQ |
| 649 | struct irq_desc *desc; |
| 650 | int irq; |
| 651 | int count = *pos; |
| 652 | |
| 653 | for_each_irq_desc(irq, desc) { |
| 654 | if (count-- == 0) |
| 655 | return desc; |
| 656 | } |
| 657 | |
| 658 | return NULL; |
| 659 | #else |
| 660 | return (*pos <= nr_irqs) ? pos : NULL; |
| 661 | #endif |
| 662 | } |
| 663 | |
| 664 | |
| 665 | static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos) |
| 666 | { |
| 667 | #ifdef CONFIG_HAVE_SPARSE_IRQ |
| 668 | struct irq_desc *desc; |
| 669 | |
| 670 | desc = ((struct irq_desc *)v)->next; |
| 671 | (*pos)++; |
| 672 | |
| 673 | return desc; |
| 674 | #else |
| 675 | (*pos)++; |
| 676 | return (*pos <= nr_irqs) ? pos : NULL; |
| 677 | #endif |
| 678 | } |
| 679 | |
| 680 | static void int_seq_stop(struct seq_file *f, void *v) |
| 681 | { |
| 682 | /* Nothing to do */ |
| 683 | } |
| 684 | |
| 685 | static const struct seq_operations int_seq_ops = { |
| 686 | .start = int_seq_start, |
| 687 | .next = int_seq_next, |
| 688 | .stop = int_seq_stop, |
| 689 | .show = show_interrupts |
| 690 | }; |
| 691 | |
| 692 | static int interrupts_open(struct inode *inode, struct file *filp) |
| 693 | { |
| 694 | return seq_open(filp, &int_seq_ops); |
| 695 | } |
| 696 | |
| 697 | static const struct file_operations proc_interrupts_operations = { |
| 698 | .open = interrupts_open, |
| 699 | .read = seq_read, |
| 700 | .llseek = seq_lseek, |
| 701 | .release = seq_release, |
| 702 | }; |
| 703 | |
| 704 | static int filesystems_read_proc(char *page, char **start, off_t off, |
| 705 | int count, int *eof, void *data) |
| 706 | { |
| 707 | int len = get_filesystem_list(page); |
| 708 | return proc_calc_metrics(page, start, off, count, eof, len); |
| 709 | } |
| 710 | |
| 711 | static int cmdline_read_proc(char *page, char **start, off_t off, |
| 712 | int count, int *eof, void *data) |
| 713 | { |
| 714 | int len; |
| 715 | |
| 716 | len = sprintf(page, "%s\n", saved_command_line); |
| 717 | return proc_calc_metrics(page, start, off, count, eof, len); |
| 718 | } |
| 719 | |
| 720 | #ifdef CONFIG_FILE_LOCKING |
| 721 | static int locks_open(struct inode *inode, struct file *filp) |
| 722 | { |
| 723 | return seq_open(filp, &locks_seq_operations); |
| 724 | } |
| 725 | |
| 726 | static const struct file_operations proc_locks_operations = { |
| 727 | .open = locks_open, |
| 728 | .read = seq_read, |
| 729 | .llseek = seq_lseek, |
| 730 | .release = seq_release, |
| 731 | }; |
| 732 | #endif /* CONFIG_FILE_LOCKING */ |
| 733 | |
| 734 | static int execdomains_read_proc(char *page, char **start, off_t off, |
| 735 | int count, int *eof, void *data) |
| 736 | { |
| 737 | int len = get_exec_domain_list(page); |
| 738 | return proc_calc_metrics(page, start, off, count, eof, len); |
| 739 | } |
| 740 | |
| 741 | #ifdef CONFIG_MAGIC_SYSRQ |
| 742 | /* |
| 743 | * writing 'C' to /proc/sysrq-trigger is like sysrq-C |
| 744 | */ |
| 745 | static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf, |
| 746 | size_t count, loff_t *ppos) |
| 747 | { |
| 748 | if (count) { |
| 749 | char c; |
| 750 | |
| 751 | if (get_user(c, buf)) |
| 752 | return -EFAULT; |
| 753 | __handle_sysrq(c, NULL, 0); |
| 754 | } |
| 755 | return count; |
| 756 | } |
| 757 | |
| 758 | static const struct file_operations proc_sysrq_trigger_operations = { |
| 759 | .write = write_sysrq_trigger, |
| 760 | }; |
| 761 | #endif |
| 762 | |
| 763 | #ifdef CONFIG_PROC_PAGE_MONITOR |
| 764 | #define KPMSIZE sizeof(u64) |
| 765 | #define KPMMASK (KPMSIZE - 1) |
| 766 | /* /proc/kpagecount - an array exposing page counts |
| 767 | * |
| 768 | * Each entry is a u64 representing the corresponding |
| 769 | * physical page count. |
| 770 | */ |
| 771 | static ssize_t kpagecount_read(struct file *file, char __user *buf, |
| 772 | size_t count, loff_t *ppos) |
| 773 | { |
| 774 | u64 __user *out = (u64 __user *)buf; |
| 775 | struct page *ppage; |
| 776 | unsigned long src = *ppos; |
| 777 | unsigned long pfn; |
| 778 | ssize_t ret = 0; |
| 779 | u64 pcount; |
| 780 | |
| 781 | pfn = src / KPMSIZE; |
| 782 | count = min_t(size_t, count, (max_pfn * KPMSIZE) - src); |
| 783 | if (src & KPMMASK || count & KPMMASK) |
| 784 | return -EINVAL; |
| 785 | |
| 786 | while (count > 0) { |
| 787 | ppage = NULL; |
| 788 | if (pfn_valid(pfn)) |
| 789 | ppage = pfn_to_page(pfn); |
| 790 | pfn++; |
| 791 | if (!ppage) |
| 792 | pcount = 0; |
| 793 | else |
| 794 | pcount = page_mapcount(ppage); |
| 795 | |
| 796 | if (put_user(pcount, out++)) { |
| 797 | ret = -EFAULT; |
| 798 | break; |
| 799 | } |
| 800 | |
| 801 | count -= KPMSIZE; |
| 802 | } |
| 803 | |
| 804 | *ppos += (char __user *)out - buf; |
| 805 | if (!ret) |
| 806 | ret = (char __user *)out - buf; |
| 807 | return ret; |
| 808 | } |
| 809 | |
| 810 | static struct file_operations proc_kpagecount_operations = { |
| 811 | .llseek = mem_lseek, |
| 812 | .read = kpagecount_read, |
| 813 | }; |
| 814 | |
| 815 | /* /proc/kpageflags - an array exposing page flags |
| 816 | * |
| 817 | * Each entry is a u64 representing the corresponding |
| 818 | * physical page flags. |
| 819 | */ |
| 820 | |
| 821 | /* These macros are used to decouple internal flags from exported ones */ |
| 822 | |
| 823 | #define KPF_LOCKED 0 |
| 824 | #define KPF_ERROR 1 |
| 825 | #define KPF_REFERENCED 2 |
| 826 | #define KPF_UPTODATE 3 |
| 827 | #define KPF_DIRTY 4 |
| 828 | #define KPF_LRU 5 |
| 829 | #define KPF_ACTIVE 6 |
| 830 | #define KPF_SLAB 7 |
| 831 | #define KPF_WRITEBACK 8 |
| 832 | #define KPF_RECLAIM 9 |
| 833 | #define KPF_BUDDY 10 |
| 834 | |
| 835 | #define kpf_copy_bit(flags, srcpos, dstpos) (((flags >> srcpos) & 1) << dstpos) |
| 836 | |
| 837 | static ssize_t kpageflags_read(struct file *file, char __user *buf, |
| 838 | size_t count, loff_t *ppos) |
| 839 | { |
| 840 | u64 __user *out = (u64 __user *)buf; |
| 841 | struct page *ppage; |
| 842 | unsigned long src = *ppos; |
| 843 | unsigned long pfn; |
| 844 | ssize_t ret = 0; |
| 845 | u64 kflags, uflags; |
| 846 | |
| 847 | pfn = src / KPMSIZE; |
| 848 | count = min_t(unsigned long, count, (max_pfn * KPMSIZE) - src); |
| 849 | if (src & KPMMASK || count & KPMMASK) |
| 850 | return -EINVAL; |
| 851 | |
| 852 | while (count > 0) { |
| 853 | ppage = NULL; |
| 854 | if (pfn_valid(pfn)) |
| 855 | ppage = pfn_to_page(pfn); |
| 856 | pfn++; |
| 857 | if (!ppage) |
| 858 | kflags = 0; |
| 859 | else |
| 860 | kflags = ppage->flags; |
| 861 | |
| 862 | uflags = kpf_copy_bit(KPF_LOCKED, PG_locked, kflags) | |
| 863 | kpf_copy_bit(kflags, KPF_ERROR, PG_error) | |
| 864 | kpf_copy_bit(kflags, KPF_REFERENCED, PG_referenced) | |
| 865 | kpf_copy_bit(kflags, KPF_UPTODATE, PG_uptodate) | |
| 866 | kpf_copy_bit(kflags, KPF_DIRTY, PG_dirty) | |
| 867 | kpf_copy_bit(kflags, KPF_LRU, PG_lru) | |
| 868 | kpf_copy_bit(kflags, KPF_ACTIVE, PG_active) | |
| 869 | kpf_copy_bit(kflags, KPF_SLAB, PG_slab) | |
| 870 | kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) | |
| 871 | kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) | |
| 872 | kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy); |
| 873 | |
| 874 | if (put_user(uflags, out++)) { |
| 875 | ret = -EFAULT; |
| 876 | break; |
| 877 | } |
| 878 | |
| 879 | count -= KPMSIZE; |
| 880 | } |
| 881 | |
| 882 | *ppos += (char __user *)out - buf; |
| 883 | if (!ret) |
| 884 | ret = (char __user *)out - buf; |
| 885 | return ret; |
| 886 | } |
| 887 | |
| 888 | static struct file_operations proc_kpageflags_operations = { |
| 889 | .llseek = mem_lseek, |
| 890 | .read = kpageflags_read, |
| 891 | }; |
| 892 | #endif /* CONFIG_PROC_PAGE_MONITOR */ |
| 893 | |
| 894 | struct proc_dir_entry *proc_root_kcore; |
| 895 | |
| 896 | void __init proc_misc_init(void) |
| 897 | { |
| 898 | static struct { |
| 899 | char *name; |
| 900 | int (*read_proc)(char*,char**,off_t,int,int*,void*); |
| 901 | } *p, simple_ones[] = { |
| 902 | {"loadavg", loadavg_read_proc}, |
| 903 | {"uptime", uptime_read_proc}, |
| 904 | {"meminfo", meminfo_read_proc}, |
| 905 | {"version", version_read_proc}, |
| 906 | #ifdef CONFIG_PROC_HARDWARE |
| 907 | {"hardware", hardware_read_proc}, |
| 908 | #endif |
| 909 | #ifdef CONFIG_STRAM_PROC |
| 910 | {"stram", stram_read_proc}, |
| 911 | #endif |
| 912 | {"filesystems", filesystems_read_proc}, |
| 913 | {"cmdline", cmdline_read_proc}, |
| 914 | {"execdomains", execdomains_read_proc}, |
| 915 | {NULL,} |
| 916 | }; |
| 917 | for (p = simple_ones; p->name; p++) |
| 918 | create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL); |
| 919 | |
| 920 | proc_symlink("mounts", NULL, "self/mounts"); |
| 921 | |
| 922 | /* And now for trickier ones */ |
| 923 | #ifdef CONFIG_PRINTK |
| 924 | proc_create("kmsg", S_IRUSR, NULL, &proc_kmsg_operations); |
| 925 | #endif |
| 926 | #ifdef CONFIG_FILE_LOCKING |
| 927 | proc_create("locks", 0, NULL, &proc_locks_operations); |
| 928 | #endif |
| 929 | proc_create("devices", 0, NULL, &proc_devinfo_operations); |
| 930 | proc_create("cpuinfo", 0, NULL, &proc_cpuinfo_operations); |
| 931 | #ifdef CONFIG_BLOCK |
| 932 | proc_create("partitions", 0, NULL, &proc_partitions_operations); |
| 933 | #endif |
| 934 | proc_create("stat", 0, NULL, &proc_stat_operations); |
| 935 | proc_create("interrupts", 0, NULL, &proc_interrupts_operations); |
| 936 | #ifdef CONFIG_SLABINFO |
| 937 | proc_create("slabinfo",S_IWUSR|S_IRUGO,NULL,&proc_slabinfo_operations); |
| 938 | #ifdef CONFIG_DEBUG_SLAB_LEAK |
| 939 | proc_create("slab_allocators", 0, NULL, &proc_slabstats_operations); |
| 940 | #endif |
| 941 | #endif |
| 942 | #ifdef CONFIG_MMU |
| 943 | proc_create("vmallocinfo", S_IRUSR, NULL, &proc_vmalloc_operations); |
| 944 | #endif |
| 945 | proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations); |
| 946 | proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops); |
| 947 | proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations); |
| 948 | proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations); |
| 949 | #ifdef CONFIG_BLOCK |
| 950 | proc_create("diskstats", 0, NULL, &proc_diskstats_operations); |
| 951 | #endif |
| 952 | #ifdef CONFIG_MODULES |
| 953 | proc_create("modules", 0, NULL, &proc_modules_operations); |
| 954 | #endif |
| 955 | #ifdef CONFIG_SCHEDSTATS |
| 956 | proc_create("schedstat", 0, NULL, &proc_schedstat_operations); |
| 957 | #endif |
| 958 | #ifdef CONFIG_PROC_KCORE |
| 959 | proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &proc_kcore_operations); |
| 960 | if (proc_root_kcore) |
| 961 | proc_root_kcore->size = |
| 962 | (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE; |
| 963 | #endif |
| 964 | #ifdef CONFIG_PROC_PAGE_MONITOR |
| 965 | proc_create("kpagecount", S_IRUSR, NULL, &proc_kpagecount_operations); |
| 966 | proc_create("kpageflags", S_IRUSR, NULL, &proc_kpageflags_operations); |
| 967 | #endif |
| 968 | #ifdef CONFIG_PROC_VMCORE |
| 969 | proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations); |
| 970 | #endif |
| 971 | #ifdef CONFIG_MAGIC_SYSRQ |
| 972 | proc_create("sysrq-trigger", S_IWUSR, NULL, &proc_sysrq_trigger_operations); |
| 973 | #endif |
| 974 | } |