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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 | /* * linux/fs/proc/array.c * * Copyright (C) 1992 by Linus Torvalds * based on ideas by Darren Senn * * stat,statm extensions by Michael K. Johnson, johnsonm@stolaf.edu */ #include <linux/types.h> #include <linux/errno.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/tty.h> #include <asm/segment.h> #include <asm/io.h> #define LOAD_INT(x) ((x) >> FSHIFT) #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) #define KSTK_EIP(stack) (((unsigned long *)stack)[1019]) #define KSTK_ESP(stack) (((unsigned long *)stack)[1022]) #define _SSIZE(stack) (TASK_SIZE - KSTK_ESP(stack)) #define SSIZE(stack) (KSTK_ESP(stack) ? _SSIZE(stack) : 0) #define VSIZE(task,stack) ((task)->brk + 1023 + SSIZE(stack)) static int get_loadavg(char * buffer) { int a, b, c; a = avenrun[0] + (FIXED_1/200); b = avenrun[1] + (FIXED_1/200); c = avenrun[2] + (FIXED_1/200); return sprintf(buffer,"%d.%02d %d.%02d %d.%02d\n", LOAD_INT(a), LOAD_FRAC(a), LOAD_INT(b), LOAD_FRAC(b), LOAD_INT(c), LOAD_FRAC(c)); } static int get_uptime(char * buffer) { unsigned long uptime; unsigned long idle; uptime = jiffies + jiffies_offset; idle = task[0]->utime + task[0]->stime; return sprintf(buffer,"%d.%02d %d.%02d\n", uptime / HZ, uptime % HZ, idle / HZ, idle % HZ); } static int get_meminfo(char * buffer) { struct sysinfo i; si_meminfo(&i); si_swapinfo(&i); return sprintf(buffer, " total: used: free: shared: buffers:\n" "Mem: %8d %8d %8d %8d %8d\n" "Swap: %8d %8d %8d\n", i.totalram, i.totalram-i.freeram, i.freeram, i.sharedram, i.bufferram, i.totalswap, i.totalswap-i.freeswap, i.freeswap); } static int get_version(char * buffer) { extern char *linux_banner; strcpy(buffer, linux_banner); return strlen(buffer); } static struct task_struct ** get_task(pid_t pid) { struct task_struct ** p; p = task; while (++p < task+NR_TASKS) { if (*p && (*p)->pid == pid) return p; } return NULL; } static unsigned long get_phys_addr(struct task_struct ** p, unsigned long ptr) { unsigned long page; if (!p || !*p || ptr >= TASK_SIZE) return 0; page = (*p)->tss.cr3; page += (ptr >> 20) & 0xffc; page = *(unsigned long *) page; if (!(page & 1)) return 0; page &= 0xfffff000; page += (ptr >> 10) & 0xffc; page = *(unsigned long *) page; if (!(page & 1)) return 0; page &= 0xfffff000; page += ptr & 0xfff; return page; } static int get_array(struct task_struct ** p, unsigned long start, unsigned long end, char * buffer) { unsigned long addr; int size = 0, result = 0; char c; if (start >= end) return result; for (;;) { addr = get_phys_addr(p, start); if (!addr) return result; do { c = *(char *) addr; if (!c) result = size; if (size < PAGE_SIZE) buffer[size++] = c; else return result; addr++; start++; if (start >= end) return result; } while (!(addr & 0xfff)); } } static int get_env(int pid, char * buffer) { struct task_struct ** p = get_task(pid); if (!p || !*p) return 0; return get_array(p, (*p)->env_start, (*p)->env_end, buffer); } static int get_arg(int pid, char * buffer) { struct task_struct ** p = get_task(pid); if (!p || !*p) return 0; return get_array(p, (*p)->arg_start, (*p)->arg_end, buffer); } static unsigned long get_wchan(struct task_struct *p) { unsigned long ebp, eip; unsigned long stack_page; int count = 0; if (!p || p == current || p->state == TASK_RUNNING) return 0; ebp = p->tss.ebp; stack_page = p->kernel_stack_page; do { if (ebp < stack_page || ebp >= 4092+stack_page) return 0; eip = *(unsigned long *) (ebp+4); if ((void *)eip != sleep_on && (void *)eip != interruptible_sleep_on) return eip; ebp = *(unsigned long *) ebp; } while (count++ < 16); return 0; } static int get_stat(int pid, char * buffer) { struct task_struct ** p = get_task(pid); unsigned long sigignore=0, sigcatch=0, bit=1, wchan; int i,tty_pgrp; char state; if (!p || !*p) return 0; if ((*p)->state < 0 || (*p)->state > 5) state = '.'; else state = "RSDZTD"[(*p)->state]; wchan = get_wchan(*p); for(i=0; i<32; ++i) { switch((int) (*p)->sigaction[i].sa_handler) { case 1: sigignore |= bit; break; case 0: break; default: sigcatch |= bit; } bit <<= 1; } tty_pgrp = (*p)->tty; if (tty_pgrp > 0 && tty_table[tty_pgrp]) tty_pgrp = tty_table[tty_pgrp]->pgrp; else tty_pgrp = -1; return sprintf(buffer,"%d (%s) %c %d %d %d %d %d %u %u \ %u %u %u %d %d %d %d %d %d %u %u %d %u %u %u %u %u %u %u %u %d \ %d %d %d %u\n", pid, (*p)->comm, state, (*p)->p_pptr->pid, (*p)->pgrp, (*p)->session, (*p)->tty, tty_pgrp, (*p)->flags, (*p)->min_flt, (*p)->cmin_flt, (*p)->maj_flt, (*p)->cmaj_flt, (*p)->utime, (*p)->stime, (*p)->cutime, (*p)->cstime, (*p)->counter, /* this is the kernel priority --- subtract 30 in your user-level program. */ (*p)->priority, /* this is the nice value --- subtract 15 in your user-level program. */ (*p)->timeout, (*p)->it_real_value, (*p)->start_time, VSIZE((*p),(*p)->kernel_stack_page), (*p)->rss, /* you might want to shift this left 3 */ (*p)->rlim[RLIMIT_RSS].rlim_cur, (*p)->start_code, (*p)->end_code, (*p)->start_stack, KSTK_ESP((*p)->kernel_stack_page), KSTK_EIP((*p)->kernel_stack_page), (*p)->signal, (*p)->blocked, sigignore, sigcatch, wchan); } static int get_statm(int pid, char * buffer) { struct task_struct ** p = get_task(pid); int i, tpag; int size=0, resident=0, share=0, trs=0, lrs=0, drs=0, dt=0; unsigned long ptbl, *buf, *pte, *pagedir, map_nr; if (!p || !*p) return 0; tpag = (*p)->end_code / PAGE_SIZE; if ((*p)->state != TASK_ZOMBIE) { pagedir = (void *)((*p)->tss.cr3 + ((*p)->start_code >> 20)); for (i = 0; i < 0x300; ++i) { if ((ptbl = pagedir[i]) == 0) { tpag -= 1024; continue; } buf = (void *)(ptbl & 0xfffff000); for (pte = buf; pte < (buf + 1024); ++pte) { if (*pte != 0) { ++size; if (*pte & 1) { ++resident; if (tpag > 0) ++trs; else ++drs; if (i >= 15 && i < 0x2f0) { ++lrs; if (*pte & 0x40) ++dt; else --drs; } map_nr = MAP_NR(*pte); if (map_nr < (high_memory / 4096) && mem_map[map_nr] > 1) ++share; } } --tpag; } } } return sprintf(buffer,"%d %d %d %d %d %d %d\n", size, resident, share, trs, lrs, drs, dt); } static int array_read(struct inode * inode, struct file * file,char * buf, int count) { char * page; int length; int end; unsigned int type, pid; if (count < 0) return -EINVAL; page = (char *) get_free_page(GFP_KERNEL); if (!page) return -ENOMEM; type = inode->i_ino; pid = type >> 16; type &= 0x0000ffff; switch (type) { case 2: length = get_loadavg(page); break; case 3: length = get_uptime(page); break; case 4: length = get_meminfo(page); break; case 6: length = get_version(page); break; case 9: length = get_env(pid, page); break; case 10: length = get_arg(pid, page); break; case 11: length = get_stat(pid, page); break; case 12: length = get_statm(pid, page); break; default: free_page((unsigned long) page); return -EBADF; } if (file->f_pos >= length) { free_page((unsigned long) page); return 0; } if (count + file->f_pos > length) count = length - file->f_pos; end = count + file->f_pos; memcpy_tofs(buf, page + file->f_pos, count); free_page((unsigned long) page); file->f_pos = end; return count; } static struct file_operations proc_array_operations = { NULL, /* array_lseek */ array_read, NULL, /* array_write */ NULL, /* array_readdir */ NULL, /* array_select */ NULL, /* array_ioctl */ NULL, /* mmap */ NULL, /* no special open code */ NULL, /* no special release code */ NULL /* can't fsync */ }; struct inode_operations proc_array_inode_operations = { &proc_array_operations, /* default base directory file-ops */ NULL, /* create */ NULL, /* lookup */ NULL, /* link */ NULL, /* unlink */ NULL, /* symlink */ NULL, /* mkdir */ NULL, /* rmdir */ NULL, /* mknod */ NULL, /* rename */ NULL, /* readlink */ NULL, /* follow_link */ NULL, /* bmap */ NULL, /* truncate */ NULL /* permission */ }; |