Commit | Line | Data |
---|---|---|
35efa5e9 WF |
1 | /* |
2 | * page-types: Tool for querying page flags | |
3 | * | |
0e9052eb WF |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the Free | |
6 | * Software Foundation; version 2. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should find a copy of v2 of the GNU General Public License somewhere on | |
14 | * your Linux system; if not, write to the Free Software Foundation, Inc., 59 | |
15 | * Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
35efa5e9 | 17 | * Copyright (C) 2009 Intel corporation |
0c57effe WF |
18 | * |
19 | * Authors: Wu Fengguang <fengguang.wu@intel.com> | |
35efa5e9 WF |
20 | */ |
21 | ||
65a6a410 KK |
22 | #define _FILE_OFFSET_BITS 64 |
23 | #define _GNU_SOURCE | |
35efa5e9 WF |
24 | #include <stdio.h> |
25 | #include <stdlib.h> | |
26 | #include <unistd.h> | |
27 | #include <stdint.h> | |
28 | #include <stdarg.h> | |
29 | #include <string.h> | |
30 | #include <getopt.h> | |
31 | #include <limits.h> | |
0b4b2ad5 | 32 | #include <assert.h> |
65a6a410 KK |
33 | #include <ftw.h> |
34 | #include <time.h> | |
1d46598b KK |
35 | #include <setjmp.h> |
36 | #include <signal.h> | |
35efa5e9 WF |
37 | #include <sys/types.h> |
38 | #include <sys/errno.h> | |
39 | #include <sys/fcntl.h> | |
12da58b0 CG |
40 | #include <sys/mount.h> |
41 | #include <sys/statfs.h> | |
65a6a410 | 42 | #include <sys/mman.h> |
607ca46e | 43 | #include "../../include/uapi/linux/magic.h" |
59ce8764 | 44 | #include "../../include/uapi/linux/kernel-page-flags.h" |
553873e1 | 45 | #include <api/fs/debugfs.h> |
35efa5e9 | 46 | |
12da58b0 CG |
47 | #ifndef MAX_PATH |
48 | # define MAX_PATH 256 | |
49 | #endif | |
50 | ||
51 | #ifndef STR | |
52 | # define _STR(x) #x | |
53 | # define STR(x) _STR(x) | |
54 | #endif | |
55 | ||
0b4b2ad5 WF |
56 | /* |
57 | * pagemap kernel ABI bits | |
58 | */ | |
59 | ||
60 | #define PM_ENTRY_BYTES sizeof(uint64_t) | |
61 | #define PM_STATUS_BITS 3 | |
62 | #define PM_STATUS_OFFSET (64 - PM_STATUS_BITS) | |
63 | #define PM_STATUS_MASK (((1LL << PM_STATUS_BITS) - 1) << PM_STATUS_OFFSET) | |
64 | #define PM_STATUS(nr) (((nr) << PM_STATUS_OFFSET) & PM_STATUS_MASK) | |
65 | #define PM_PSHIFT_BITS 6 | |
66 | #define PM_PSHIFT_OFFSET (PM_STATUS_OFFSET - PM_PSHIFT_BITS) | |
67 | #define PM_PSHIFT_MASK (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET) | |
46c77e2b | 68 | #define __PM_PSHIFT(x) (((uint64_t) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK) |
0b4b2ad5 WF |
69 | #define PM_PFRAME_MASK ((1LL << PM_PSHIFT_OFFSET) - 1) |
70 | #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK) | |
71 | ||
46c77e2b | 72 | #define __PM_SOFT_DIRTY (1LL) |
0b4b2ad5 WF |
73 | #define PM_PRESENT PM_STATUS(4LL) |
74 | #define PM_SWAP PM_STATUS(2LL) | |
46c77e2b | 75 | #define PM_SOFT_DIRTY __PM_PSHIFT(__PM_SOFT_DIRTY) |
0b4b2ad5 WF |
76 | |
77 | ||
35efa5e9 WF |
78 | /* |
79 | * kernel page flags | |
80 | */ | |
81 | ||
82 | #define KPF_BYTES 8 | |
83 | #define PROC_KPAGEFLAGS "/proc/kpageflags" | |
84 | ||
35efa5e9 WF |
85 | /* [32-] kernel hacking assistances */ |
86 | #define KPF_RESERVED 32 | |
87 | #define KPF_MLOCKED 33 | |
88 | #define KPF_MAPPEDTODISK 34 | |
89 | #define KPF_PRIVATE 35 | |
90 | #define KPF_PRIVATE_2 36 | |
91 | #define KPF_OWNER_PRIVATE 37 | |
92 | #define KPF_ARCH 38 | |
93 | #define KPF_UNCACHED 39 | |
46c77e2b | 94 | #define KPF_SOFTDIRTY 40 |
35efa5e9 WF |
95 | |
96 | /* [48-] take some arbitrary free slots for expanding overloaded flags | |
97 | * not part of kernel API | |
98 | */ | |
99 | #define KPF_READAHEAD 48 | |
100 | #define KPF_SLOB_FREE 49 | |
101 | #define KPF_SLUB_FROZEN 50 | |
102 | #define KPF_SLUB_DEBUG 51 | |
103 | ||
104 | #define KPF_ALL_BITS ((uint64_t)~0ULL) | |
105 | #define KPF_HACKERS_BITS (0xffffULL << 32) | |
106 | #define KPF_OVERLOADED_BITS (0xffffULL << 48) | |
107 | #define BIT(name) (1ULL << KPF_##name) | |
108 | #define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL)) | |
109 | ||
c6dd897f | 110 | static const char * const page_flag_names[] = { |
35efa5e9 WF |
111 | [KPF_LOCKED] = "L:locked", |
112 | [KPF_ERROR] = "E:error", | |
113 | [KPF_REFERENCED] = "R:referenced", | |
114 | [KPF_UPTODATE] = "U:uptodate", | |
115 | [KPF_DIRTY] = "D:dirty", | |
116 | [KPF_LRU] = "l:lru", | |
117 | [KPF_ACTIVE] = "A:active", | |
118 | [KPF_SLAB] = "S:slab", | |
119 | [KPF_WRITEBACK] = "W:writeback", | |
120 | [KPF_RECLAIM] = "I:reclaim", | |
121 | [KPF_BUDDY] = "B:buddy", | |
122 | ||
123 | [KPF_MMAP] = "M:mmap", | |
124 | [KPF_ANON] = "a:anonymous", | |
125 | [KPF_SWAPCACHE] = "s:swapcache", | |
126 | [KPF_SWAPBACKED] = "b:swapbacked", | |
127 | [KPF_COMPOUND_HEAD] = "H:compound_head", | |
128 | [KPF_COMPOUND_TAIL] = "T:compound_tail", | |
129 | [KPF_HUGE] = "G:huge", | |
130 | [KPF_UNEVICTABLE] = "u:unevictable", | |
253fb02d | 131 | [KPF_HWPOISON] = "X:hwpoison", |
35efa5e9 | 132 | [KPF_NOPAGE] = "n:nopage", |
a1bbb5ec | 133 | [KPF_KSM] = "x:ksm", |
807f0ccf | 134 | [KPF_THP] = "t:thp", |
09316c09 | 135 | [KPF_BALLOON] = "o:balloon", |
56873f43 | 136 | [KPF_ZERO_PAGE] = "z:zero_page", |
35efa5e9 WF |
137 | |
138 | [KPF_RESERVED] = "r:reserved", | |
139 | [KPF_MLOCKED] = "m:mlocked", | |
140 | [KPF_MAPPEDTODISK] = "d:mappedtodisk", | |
141 | [KPF_PRIVATE] = "P:private", | |
142 | [KPF_PRIVATE_2] = "p:private_2", | |
143 | [KPF_OWNER_PRIVATE] = "O:owner_private", | |
144 | [KPF_ARCH] = "h:arch", | |
145 | [KPF_UNCACHED] = "c:uncached", | |
46c77e2b | 146 | [KPF_SOFTDIRTY] = "f:softdirty", |
35efa5e9 WF |
147 | |
148 | [KPF_READAHEAD] = "I:readahead", | |
149 | [KPF_SLOB_FREE] = "P:slob_free", | |
150 | [KPF_SLUB_FROZEN] = "A:slub_frozen", | |
151 | [KPF_SLUB_DEBUG] = "E:slub_debug", | |
152 | }; | |
153 | ||
154 | ||
c6dd897f | 155 | static const char * const debugfs_known_mountpoints[] = { |
12da58b0 CG |
156 | "/sys/kernel/debug", |
157 | "/debug", | |
158 | 0, | |
159 | }; | |
160 | ||
35efa5e9 WF |
161 | /* |
162 | * data structures | |
163 | */ | |
164 | ||
165 | static int opt_raw; /* for kernel developers */ | |
166 | static int opt_list; /* list pages (in ranges) */ | |
167 | static int opt_no_summary; /* don't show summary */ | |
168 | static pid_t opt_pid; /* process to walk */ | |
65a6a410 | 169 | const char * opt_file; |
35efa5e9 WF |
170 | |
171 | #define MAX_ADDR_RANGES 1024 | |
172 | static int nr_addr_ranges; | |
173 | static unsigned long opt_offset[MAX_ADDR_RANGES]; | |
174 | static unsigned long opt_size[MAX_ADDR_RANGES]; | |
175 | ||
0b4b2ad5 WF |
176 | #define MAX_VMAS 10240 |
177 | static int nr_vmas; | |
178 | static unsigned long pg_start[MAX_VMAS]; | |
179 | static unsigned long pg_end[MAX_VMAS]; | |
0b4b2ad5 | 180 | |
35efa5e9 WF |
181 | #define MAX_BIT_FILTERS 64 |
182 | static int nr_bit_filters; | |
183 | static uint64_t opt_mask[MAX_BIT_FILTERS]; | |
184 | static uint64_t opt_bits[MAX_BIT_FILTERS]; | |
185 | ||
186 | static int page_size; | |
187 | ||
4a1b6726 | 188 | static int pagemap_fd; |
35efa5e9 | 189 | static int kpageflags_fd; |
35efa5e9 | 190 | |
a54fed9f WF |
191 | static int opt_hwpoison; |
192 | static int opt_unpoison; | |
193 | ||
5a439645 | 194 | static char *hwpoison_debug_fs; |
a54fed9f WF |
195 | static int hwpoison_inject_fd; |
196 | static int hwpoison_forget_fd; | |
197 | ||
35efa5e9 WF |
198 | #define HASH_SHIFT 13 |
199 | #define HASH_SIZE (1 << HASH_SHIFT) | |
200 | #define HASH_MASK (HASH_SIZE - 1) | |
201 | #define HASH_KEY(flags) (flags & HASH_MASK) | |
202 | ||
203 | static unsigned long total_pages; | |
204 | static unsigned long nr_pages[HASH_SIZE]; | |
c6dd897f | 205 | static uint64_t page_flags[HASH_SIZE]; |
35efa5e9 WF |
206 | |
207 | ||
208 | /* | |
209 | * helper functions | |
210 | */ | |
211 | ||
212 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) | |
213 | ||
214 | #define min_t(type, x, y) ({ \ | |
215 | type __min1 = (x); \ | |
216 | type __min2 = (y); \ | |
217 | __min1 < __min2 ? __min1 : __min2; }) | |
218 | ||
0b4b2ad5 WF |
219 | #define max_t(type, x, y) ({ \ |
220 | type __max1 = (x); \ | |
221 | type __max2 = (y); \ | |
222 | __max1 > __max2 ? __max1 : __max2; }) | |
223 | ||
b7ed698c | 224 | static unsigned long pages2mb(unsigned long pages) |
35efa5e9 WF |
225 | { |
226 | return (pages * page_size) >> 20; | |
227 | } | |
228 | ||
b7ed698c | 229 | static void fatal(const char *x, ...) |
35efa5e9 WF |
230 | { |
231 | va_list ap; | |
232 | ||
233 | va_start(ap, x); | |
234 | vfprintf(stderr, x, ap); | |
235 | va_end(ap); | |
236 | exit(EXIT_FAILURE); | |
237 | } | |
238 | ||
1b98c00b | 239 | static int checked_open(const char *pathname, int flags) |
31bbf66e WF |
240 | { |
241 | int fd = open(pathname, flags); | |
242 | ||
243 | if (fd < 0) { | |
244 | perror(pathname); | |
245 | exit(EXIT_FAILURE); | |
246 | } | |
247 | ||
248 | return fd; | |
249 | } | |
250 | ||
4a1b6726 WF |
251 | /* |
252 | * pagemap/kpageflags routines | |
253 | */ | |
254 | ||
255 | static unsigned long do_u64_read(int fd, char *name, | |
256 | uint64_t *buf, | |
257 | unsigned long index, | |
258 | unsigned long count) | |
259 | { | |
260 | long bytes; | |
261 | ||
262 | if (index > ULONG_MAX / 8) | |
263 | fatal("index overflow: %lu\n", index); | |
264 | ||
65a6a410 | 265 | bytes = pread(fd, buf, count * 8, (off_t)index * 8); |
4a1b6726 WF |
266 | if (bytes < 0) { |
267 | perror(name); | |
268 | exit(EXIT_FAILURE); | |
269 | } | |
270 | if (bytes % 8) | |
271 | fatal("partial read: %lu bytes\n", bytes); | |
272 | ||
273 | return bytes / 8; | |
274 | } | |
275 | ||
276 | static unsigned long kpageflags_read(uint64_t *buf, | |
277 | unsigned long index, | |
278 | unsigned long pages) | |
279 | { | |
280 | return do_u64_read(kpageflags_fd, PROC_KPAGEFLAGS, buf, index, pages); | |
281 | } | |
282 | ||
283 | static unsigned long pagemap_read(uint64_t *buf, | |
284 | unsigned long index, | |
285 | unsigned long pages) | |
286 | { | |
287 | return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages); | |
288 | } | |
289 | ||
290 | static unsigned long pagemap_pfn(uint64_t val) | |
291 | { | |
292 | unsigned long pfn; | |
293 | ||
294 | if (val & PM_PRESENT) | |
295 | pfn = PM_PFRAME(val); | |
296 | else | |
297 | pfn = 0; | |
298 | ||
299 | return pfn; | |
300 | } | |
301 | ||
35efa5e9 WF |
302 | |
303 | /* | |
304 | * page flag names | |
305 | */ | |
306 | ||
b7ed698c | 307 | static char *page_flag_name(uint64_t flags) |
35efa5e9 WF |
308 | { |
309 | static char buf[65]; | |
310 | int present; | |
e30d539b | 311 | size_t i, j; |
35efa5e9 WF |
312 | |
313 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
314 | present = (flags >> i) & 1; | |
315 | if (!page_flag_names[i]) { | |
316 | if (present) | |
af901ca1 | 317 | fatal("unknown flag bit %d\n", i); |
35efa5e9 WF |
318 | continue; |
319 | } | |
320 | buf[j++] = present ? page_flag_names[i][0] : '_'; | |
321 | } | |
322 | ||
323 | return buf; | |
324 | } | |
325 | ||
b7ed698c | 326 | static char *page_flag_longname(uint64_t flags) |
35efa5e9 WF |
327 | { |
328 | static char buf[1024]; | |
e30d539b | 329 | size_t i, n; |
35efa5e9 WF |
330 | |
331 | for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
332 | if (!page_flag_names[i]) | |
333 | continue; | |
334 | if ((flags >> i) & 1) | |
335 | n += snprintf(buf + n, sizeof(buf) - n, "%s,", | |
336 | page_flag_names[i] + 2); | |
337 | } | |
338 | if (n) | |
339 | n--; | |
340 | buf[n] = '\0'; | |
341 | ||
342 | return buf; | |
343 | } | |
344 | ||
345 | ||
346 | /* | |
347 | * page list and summary | |
348 | */ | |
349 | ||
65a6a410 KK |
350 | static void show_page_range(unsigned long voffset, unsigned long offset, |
351 | unsigned long size, uint64_t flags) | |
35efa5e9 WF |
352 | { |
353 | static uint64_t flags0; | |
0b4b2ad5 | 354 | static unsigned long voff; |
35efa5e9 WF |
355 | static unsigned long index; |
356 | static unsigned long count; | |
357 | ||
0b4b2ad5 | 358 | if (flags == flags0 && offset == index + count && |
65a6a410 KK |
359 | size && voffset == voff + count) { |
360 | count += size; | |
35efa5e9 WF |
361 | return; |
362 | } | |
363 | ||
0b4b2ad5 WF |
364 | if (count) { |
365 | if (opt_pid) | |
366 | printf("%lx\t", voff); | |
65a6a410 KK |
367 | if (opt_file) |
368 | printf("%lu\t", voff); | |
0b4b2ad5 | 369 | printf("%lx\t%lx\t%s\n", |
35efa5e9 | 370 | index, count, page_flag_name(flags0)); |
0b4b2ad5 | 371 | } |
35efa5e9 WF |
372 | |
373 | flags0 = flags; | |
374 | index = offset; | |
0b4b2ad5 | 375 | voff = voffset; |
65a6a410 KK |
376 | count = size; |
377 | } | |
378 | ||
379 | static void flush_page_range(void) | |
380 | { | |
381 | show_page_range(0, 0, 0, 0); | |
35efa5e9 WF |
382 | } |
383 | ||
e577ebde WF |
384 | static void show_page(unsigned long voffset, |
385 | unsigned long offset, uint64_t flags) | |
35efa5e9 | 386 | { |
0b4b2ad5 WF |
387 | if (opt_pid) |
388 | printf("%lx\t", voffset); | |
65a6a410 KK |
389 | if (opt_file) |
390 | printf("%lu\t", voffset); | |
0b4b2ad5 | 391 | printf("%lx\t%s\n", offset, page_flag_name(flags)); |
35efa5e9 WF |
392 | } |
393 | ||
b7ed698c | 394 | static void show_summary(void) |
35efa5e9 | 395 | { |
e30d539b | 396 | size_t i; |
35efa5e9 WF |
397 | |
398 | printf(" flags\tpage-count MB" | |
399 | " symbolic-flags\t\t\tlong-symbolic-flags\n"); | |
400 | ||
401 | for (i = 0; i < ARRAY_SIZE(nr_pages); i++) { | |
402 | if (nr_pages[i]) | |
403 | printf("0x%016llx\t%10lu %8lu %s\t%s\n", | |
404 | (unsigned long long)page_flags[i], | |
405 | nr_pages[i], | |
406 | pages2mb(nr_pages[i]), | |
407 | page_flag_name(page_flags[i]), | |
408 | page_flag_longname(page_flags[i])); | |
409 | } | |
410 | ||
411 | printf(" total\t%10lu %8lu\n", | |
412 | total_pages, pages2mb(total_pages)); | |
413 | } | |
414 | ||
415 | ||
416 | /* | |
417 | * page flag filters | |
418 | */ | |
419 | ||
b7ed698c | 420 | static int bit_mask_ok(uint64_t flags) |
35efa5e9 WF |
421 | { |
422 | int i; | |
423 | ||
424 | for (i = 0; i < nr_bit_filters; i++) { | |
425 | if (opt_bits[i] == KPF_ALL_BITS) { | |
426 | if ((flags & opt_mask[i]) == 0) | |
427 | return 0; | |
428 | } else { | |
429 | if ((flags & opt_mask[i]) != opt_bits[i]) | |
430 | return 0; | |
431 | } | |
432 | } | |
433 | ||
434 | return 1; | |
435 | } | |
436 | ||
46c77e2b | 437 | static uint64_t expand_overloaded_flags(uint64_t flags, uint64_t pme) |
35efa5e9 WF |
438 | { |
439 | /* SLOB/SLUB overload several page flags */ | |
440 | if (flags & BIT(SLAB)) { | |
441 | if (flags & BIT(PRIVATE)) | |
442 | flags ^= BIT(PRIVATE) | BIT(SLOB_FREE); | |
443 | if (flags & BIT(ACTIVE)) | |
444 | flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN); | |
445 | if (flags & BIT(ERROR)) | |
446 | flags ^= BIT(ERROR) | BIT(SLUB_DEBUG); | |
447 | } | |
448 | ||
449 | /* PG_reclaim is overloaded as PG_readahead in the read path */ | |
450 | if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM)) | |
451 | flags ^= BIT(RECLAIM) | BIT(READAHEAD); | |
452 | ||
46c77e2b NH |
453 | if (pme & PM_SOFT_DIRTY) |
454 | flags |= BIT(SOFTDIRTY); | |
455 | ||
35efa5e9 WF |
456 | return flags; |
457 | } | |
458 | ||
b7ed698c | 459 | static uint64_t well_known_flags(uint64_t flags) |
35efa5e9 WF |
460 | { |
461 | /* hide flags intended only for kernel hacker */ | |
462 | flags &= ~KPF_HACKERS_BITS; | |
463 | ||
464 | /* hide non-hugeTLB compound pages */ | |
465 | if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE))) | |
466 | flags &= ~BITS_COMPOUND; | |
467 | ||
468 | return flags; | |
469 | } | |
470 | ||
46c77e2b | 471 | static uint64_t kpageflags_flags(uint64_t flags, uint64_t pme) |
48640d69 | 472 | { |
46c77e2b NH |
473 | if (opt_raw) |
474 | flags = expand_overloaded_flags(flags, pme); | |
475 | else | |
48640d69 WF |
476 | flags = well_known_flags(flags); |
477 | ||
478 | return flags; | |
479 | } | |
480 | ||
a54fed9f WF |
481 | /* |
482 | * page actions | |
483 | */ | |
484 | ||
485 | static void prepare_hwpoison_fd(void) | |
486 | { | |
12da58b0 CG |
487 | char buf[MAX_PATH + 1]; |
488 | ||
5a439645 BP |
489 | hwpoison_debug_fs = debugfs_mount(NULL); |
490 | if (!hwpoison_debug_fs) { | |
491 | perror("mount debugfs"); | |
492 | exit(EXIT_FAILURE); | |
493 | } | |
a54fed9f WF |
494 | |
495 | if (opt_hwpoison && !hwpoison_inject_fd) { | |
12da58b0 CG |
496 | snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn", |
497 | hwpoison_debug_fs); | |
a54fed9f WF |
498 | hwpoison_inject_fd = checked_open(buf, O_WRONLY); |
499 | } | |
500 | ||
501 | if (opt_unpoison && !hwpoison_forget_fd) { | |
12da58b0 CG |
502 | snprintf(buf, MAX_PATH, "%s/hwpoison/unpoison-pfn", |
503 | hwpoison_debug_fs); | |
a54fed9f WF |
504 | hwpoison_forget_fd = checked_open(buf, O_WRONLY); |
505 | } | |
506 | } | |
507 | ||
508 | static int hwpoison_page(unsigned long offset) | |
509 | { | |
510 | char buf[100]; | |
511 | int len; | |
512 | ||
513 | len = sprintf(buf, "0x%lx\n", offset); | |
514 | len = write(hwpoison_inject_fd, buf, len); | |
515 | if (len < 0) { | |
516 | perror("hwpoison inject"); | |
517 | return len; | |
518 | } | |
519 | return 0; | |
520 | } | |
521 | ||
522 | static int unpoison_page(unsigned long offset) | |
523 | { | |
524 | char buf[100]; | |
525 | int len; | |
526 | ||
527 | len = sprintf(buf, "0x%lx\n", offset); | |
528 | len = write(hwpoison_forget_fd, buf, len); | |
529 | if (len < 0) { | |
530 | perror("hwpoison forget"); | |
531 | return len; | |
532 | } | |
533 | return 0; | |
534 | } | |
535 | ||
35efa5e9 WF |
536 | /* |
537 | * page frame walker | |
538 | */ | |
539 | ||
e30d539b | 540 | static size_t hash_slot(uint64_t flags) |
35efa5e9 | 541 | { |
e30d539b UD |
542 | size_t k = HASH_KEY(flags); |
543 | size_t i; | |
35efa5e9 WF |
544 | |
545 | /* Explicitly reserve slot 0 for flags 0: the following logic | |
546 | * cannot distinguish an unoccupied slot from slot (flags==0). | |
547 | */ | |
548 | if (flags == 0) | |
549 | return 0; | |
550 | ||
551 | /* search through the remaining (HASH_SIZE-1) slots */ | |
552 | for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) { | |
553 | if (!k || k >= ARRAY_SIZE(page_flags)) | |
554 | k = 1; | |
555 | if (page_flags[k] == 0) { | |
556 | page_flags[k] = flags; | |
557 | return k; | |
558 | } | |
559 | if (page_flags[k] == flags) | |
560 | return k; | |
561 | } | |
562 | ||
563 | fatal("hash table full: bump up HASH_SHIFT?\n"); | |
564 | exit(EXIT_FAILURE); | |
565 | } | |
566 | ||
e577ebde | 567 | static void add_page(unsigned long voffset, |
46c77e2b | 568 | unsigned long offset, uint64_t flags, uint64_t pme) |
35efa5e9 | 569 | { |
46c77e2b | 570 | flags = kpageflags_flags(flags, pme); |
35efa5e9 WF |
571 | |
572 | if (!bit_mask_ok(flags)) | |
573 | return; | |
574 | ||
a54fed9f WF |
575 | if (opt_hwpoison) |
576 | hwpoison_page(offset); | |
577 | if (opt_unpoison) | |
578 | unpoison_page(offset); | |
579 | ||
35efa5e9 | 580 | if (opt_list == 1) |
65a6a410 | 581 | show_page_range(voffset, offset, 1, flags); |
35efa5e9 | 582 | else if (opt_list == 2) |
e577ebde | 583 | show_page(voffset, offset, flags); |
35efa5e9 WF |
584 | |
585 | nr_pages[hash_slot(flags)]++; | |
586 | total_pages++; | |
587 | } | |
588 | ||
4a1b6726 | 589 | #define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */ |
e577ebde WF |
590 | static void walk_pfn(unsigned long voffset, |
591 | unsigned long index, | |
46c77e2b NH |
592 | unsigned long count, |
593 | uint64_t pme) | |
35efa5e9 | 594 | { |
4a1b6726 | 595 | uint64_t buf[KPAGEFLAGS_BATCH]; |
35efa5e9 | 596 | unsigned long batch; |
e30d539b | 597 | unsigned long pages; |
35efa5e9 WF |
598 | unsigned long i; |
599 | ||
35efa5e9 | 600 | while (count) { |
4a1b6726 WF |
601 | batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH); |
602 | pages = kpageflags_read(buf, index, batch); | |
603 | if (pages == 0) | |
35efa5e9 | 604 | break; |
35efa5e9 | 605 | |
4a1b6726 | 606 | for (i = 0; i < pages; i++) |
46c77e2b | 607 | add_page(voffset + i, index + i, buf[i], pme); |
35efa5e9 | 608 | |
4a1b6726 WF |
609 | index += pages; |
610 | count -= pages; | |
35efa5e9 WF |
611 | } |
612 | } | |
613 | ||
4a1b6726 WF |
614 | #define PAGEMAP_BATCH (64 << 10) |
615 | static void walk_vma(unsigned long index, unsigned long count) | |
0b4b2ad5 | 616 | { |
4a1b6726 WF |
617 | uint64_t buf[PAGEMAP_BATCH]; |
618 | unsigned long batch; | |
619 | unsigned long pages; | |
620 | unsigned long pfn; | |
621 | unsigned long i; | |
0b4b2ad5 | 622 | |
4a1b6726 WF |
623 | while (count) { |
624 | batch = min_t(unsigned long, count, PAGEMAP_BATCH); | |
625 | pages = pagemap_read(buf, index, batch); | |
626 | if (pages == 0) | |
627 | break; | |
0b4b2ad5 | 628 | |
4a1b6726 WF |
629 | for (i = 0; i < pages; i++) { |
630 | pfn = pagemap_pfn(buf[i]); | |
4a1b6726 | 631 | if (pfn) |
46c77e2b | 632 | walk_pfn(index + i, pfn, 1, buf[i]); |
4a1b6726 WF |
633 | } |
634 | ||
635 | index += pages; | |
636 | count -= pages; | |
637 | } | |
0b4b2ad5 WF |
638 | } |
639 | ||
640 | static void walk_task(unsigned long index, unsigned long count) | |
641 | { | |
0b4b2ad5 | 642 | const unsigned long end = index + count; |
e577ebde WF |
643 | unsigned long start; |
644 | int i = 0; | |
0b4b2ad5 WF |
645 | |
646 | while (index < end) { | |
647 | ||
648 | while (pg_end[i] <= index) | |
649 | if (++i >= nr_vmas) | |
650 | return; | |
651 | if (pg_start[i] >= end) | |
652 | return; | |
653 | ||
e577ebde WF |
654 | start = max_t(unsigned long, pg_start[i], index); |
655 | index = min_t(unsigned long, pg_end[i], end); | |
0b4b2ad5 | 656 | |
e577ebde WF |
657 | assert(start < index); |
658 | walk_vma(start, index - start); | |
0b4b2ad5 WF |
659 | } |
660 | } | |
661 | ||
662 | static void add_addr_range(unsigned long offset, unsigned long size) | |
663 | { | |
664 | if (nr_addr_ranges >= MAX_ADDR_RANGES) | |
665 | fatal("too many addr ranges\n"); | |
666 | ||
667 | opt_offset[nr_addr_ranges] = offset; | |
668 | opt_size[nr_addr_ranges] = min_t(unsigned long, size, ULONG_MAX-offset); | |
669 | nr_addr_ranges++; | |
670 | } | |
671 | ||
b7ed698c | 672 | static void walk_addr_ranges(void) |
35efa5e9 WF |
673 | { |
674 | int i; | |
675 | ||
31bbf66e | 676 | kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); |
35efa5e9 WF |
677 | |
678 | if (!nr_addr_ranges) | |
0b4b2ad5 | 679 | add_addr_range(0, ULONG_MAX); |
35efa5e9 WF |
680 | |
681 | for (i = 0; i < nr_addr_ranges; i++) | |
0b4b2ad5 | 682 | if (!opt_pid) |
65a6a410 | 683 | walk_pfn(opt_offset[i], opt_offset[i], opt_size[i], 0); |
0b4b2ad5 WF |
684 | else |
685 | walk_task(opt_offset[i], opt_size[i]); | |
35efa5e9 WF |
686 | |
687 | close(kpageflags_fd); | |
688 | } | |
689 | ||
690 | ||
691 | /* | |
692 | * user interface | |
693 | */ | |
694 | ||
b7ed698c | 695 | static const char *page_flag_type(uint64_t flag) |
35efa5e9 WF |
696 | { |
697 | if (flag & KPF_HACKERS_BITS) | |
698 | return "(r)"; | |
699 | if (flag & KPF_OVERLOADED_BITS) | |
700 | return "(o)"; | |
701 | return " "; | |
702 | } | |
703 | ||
b7ed698c | 704 | static void usage(void) |
35efa5e9 | 705 | { |
e30d539b | 706 | size_t i, j; |
35efa5e9 WF |
707 | |
708 | printf( | |
709 | "page-types [options]\n" | |
9fdcd886 | 710 | " -r|--raw Raw mode, for kernel developers\n" |
dcfe730c | 711 | " -d|--describe flags Describe flags\n" |
9fdcd886 AC |
712 | " -a|--addr addr-spec Walk a range of pages\n" |
713 | " -b|--bits bits-spec Walk pages with specified bits\n" | |
714 | " -p|--pid pid Walk process address space\n" | |
9fdcd886 | 715 | " -f|--file filename Walk file address space\n" |
9fdcd886 AC |
716 | " -l|--list Show page details in ranges\n" |
717 | " -L|--list-each Show page details one by one\n" | |
c7825cfa | 718 | " -N|--no-summary Don't show summary info\n" |
9fdcd886 AC |
719 | " -X|--hwpoison hwpoison pages\n" |
720 | " -x|--unpoison unpoison pages\n" | |
721 | " -h|--help Show this usage message\n" | |
dcfe730c | 722 | "flags:\n" |
9fdcd886 AC |
723 | " 0x10 bitfield format, e.g.\n" |
724 | " anon bit-name, e.g.\n" | |
725 | " 0x10,anon comma-separated list, e.g.\n" | |
35efa5e9 | 726 | "addr-spec:\n" |
9fdcd886 AC |
727 | " N one page at offset N (unit: pages)\n" |
728 | " N+M pages range from N to N+M-1\n" | |
729 | " N,M pages range from N to M-1\n" | |
730 | " N, pages range from N to end\n" | |
731 | " ,M pages range from 0 to M-1\n" | |
35efa5e9 | 732 | "bits-spec:\n" |
9fdcd886 AC |
733 | " bit1,bit2 (flags & (bit1|bit2)) != 0\n" |
734 | " bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n" | |
735 | " bit1,~bit2 (flags & (bit1|bit2)) == bit1\n" | |
736 | " =bit1,bit2 flags == (bit1|bit2)\n" | |
35efa5e9 WF |
737 | "bit-names:\n" |
738 | ); | |
739 | ||
740 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
741 | if (!page_flag_names[i]) | |
742 | continue; | |
743 | printf("%16s%s", page_flag_names[i] + 2, | |
744 | page_flag_type(1ULL << i)); | |
745 | if (++j > 3) { | |
746 | j = 0; | |
747 | putchar('\n'); | |
748 | } | |
749 | } | |
750 | printf("\n " | |
751 | "(r) raw mode bits (o) overloaded bits\n"); | |
752 | } | |
753 | ||
b7ed698c | 754 | static unsigned long long parse_number(const char *str) |
35efa5e9 WF |
755 | { |
756 | unsigned long long n; | |
757 | ||
758 | n = strtoll(str, NULL, 0); | |
759 | ||
760 | if (n == 0 && str[0] != '0') | |
761 | fatal("invalid name or number: %s\n", str); | |
762 | ||
763 | return n; | |
764 | } | |
765 | ||
b7ed698c | 766 | static void parse_pid(const char *str) |
35efa5e9 | 767 | { |
0b4b2ad5 WF |
768 | FILE *file; |
769 | char buf[5000]; | |
770 | ||
35efa5e9 | 771 | opt_pid = parse_number(str); |
35efa5e9 | 772 | |
0b4b2ad5 | 773 | sprintf(buf, "/proc/%d/pagemap", opt_pid); |
31bbf66e | 774 | pagemap_fd = checked_open(buf, O_RDONLY); |
0b4b2ad5 WF |
775 | |
776 | sprintf(buf, "/proc/%d/maps", opt_pid); | |
777 | file = fopen(buf, "r"); | |
778 | if (!file) { | |
779 | perror(buf); | |
780 | exit(EXIT_FAILURE); | |
781 | } | |
782 | ||
783 | while (fgets(buf, sizeof(buf), file) != NULL) { | |
784 | unsigned long vm_start; | |
785 | unsigned long vm_end; | |
786 | unsigned long long pgoff; | |
787 | int major, minor; | |
788 | char r, w, x, s; | |
789 | unsigned long ino; | |
790 | int n; | |
791 | ||
792 | n = sscanf(buf, "%lx-%lx %c%c%c%c %llx %x:%x %lu", | |
793 | &vm_start, | |
794 | &vm_end, | |
795 | &r, &w, &x, &s, | |
796 | &pgoff, | |
797 | &major, &minor, | |
798 | &ino); | |
799 | if (n < 10) { | |
800 | fprintf(stderr, "unexpected line: %s\n", buf); | |
801 | continue; | |
802 | } | |
803 | pg_start[nr_vmas] = vm_start / page_size; | |
804 | pg_end[nr_vmas] = vm_end / page_size; | |
805 | if (++nr_vmas >= MAX_VMAS) { | |
806 | fprintf(stderr, "too many VMAs\n"); | |
807 | break; | |
808 | } | |
809 | } | |
810 | fclose(file); | |
35efa5e9 WF |
811 | } |
812 | ||
65a6a410 KK |
813 | static void show_file(const char *name, const struct stat *st) |
814 | { | |
815 | unsigned long long size = st->st_size; | |
816 | char atime[64], mtime[64]; | |
817 | long now = time(NULL); | |
818 | ||
819 | printf("%s\tInode: %u\tSize: %llu (%llu pages)\n", | |
820 | name, (unsigned)st->st_ino, | |
821 | size, (size + page_size - 1) / page_size); | |
822 | ||
823 | strftime(atime, sizeof(atime), "%c", localtime(&st->st_atime)); | |
824 | strftime(mtime, sizeof(mtime), "%c", localtime(&st->st_mtime)); | |
825 | ||
826 | printf("Modify: %s (%ld seconds ago)\nAccess: %s (%ld seconds ago)\n", | |
827 | mtime, now - st->st_mtime, | |
828 | atime, now - st->st_atime); | |
829 | } | |
830 | ||
1d46598b KK |
831 | static sigjmp_buf sigbus_jmp; |
832 | ||
833 | static void * volatile sigbus_addr; | |
834 | ||
835 | static void sigbus_handler(int sig, siginfo_t *info, void *ucontex) | |
836 | { | |
837 | (void)sig; | |
838 | (void)ucontex; | |
839 | sigbus_addr = info ? info->si_addr : NULL; | |
840 | siglongjmp(sigbus_jmp, 1); | |
841 | } | |
842 | ||
843 | static struct sigaction sigbus_action = { | |
844 | .sa_sigaction = sigbus_handler, | |
845 | .sa_flags = SA_SIGINFO, | |
846 | }; | |
847 | ||
65a6a410 KK |
848 | static void walk_file(const char *name, const struct stat *st) |
849 | { | |
850 | uint8_t vec[PAGEMAP_BATCH]; | |
851 | uint64_t buf[PAGEMAP_BATCH], flags; | |
852 | unsigned long nr_pages, pfn, i; | |
1d46598b | 853 | off_t off, end = st->st_size; |
65a6a410 | 854 | int fd; |
65a6a410 KK |
855 | ssize_t len; |
856 | void *ptr; | |
857 | int first = 1; | |
858 | ||
859 | fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW); | |
860 | ||
1d46598b KK |
861 | for (off = 0; off < end; off += len) { |
862 | nr_pages = (end - off + page_size - 1) / page_size; | |
65a6a410 KK |
863 | if (nr_pages > PAGEMAP_BATCH) |
864 | nr_pages = PAGEMAP_BATCH; | |
865 | len = nr_pages * page_size; | |
866 | ||
867 | ptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, off); | |
868 | if (ptr == MAP_FAILED) | |
869 | fatal("mmap failed: %s", name); | |
870 | ||
871 | /* determine cached pages */ | |
872 | if (mincore(ptr, len, vec)) | |
873 | fatal("mincore failed: %s", name); | |
874 | ||
875 | /* turn off readahead */ | |
876 | if (madvise(ptr, len, MADV_RANDOM)) | |
877 | fatal("madvice failed: %s", name); | |
878 | ||
1d46598b KK |
879 | if (sigsetjmp(sigbus_jmp, 1)) { |
880 | end = off + sigbus_addr ? sigbus_addr - ptr : 0; | |
881 | fprintf(stderr, "got sigbus at offset %lld: %s\n", | |
882 | (long long)end, name); | |
883 | goto got_sigbus; | |
884 | } | |
885 | ||
65a6a410 KK |
886 | /* populate ptes */ |
887 | for (i = 0; i < nr_pages ; i++) { | |
888 | if (vec[i] & 1) | |
889 | (void)*(volatile int *)(ptr + i * page_size); | |
890 | } | |
1d46598b | 891 | got_sigbus: |
65a6a410 KK |
892 | |
893 | /* turn off harvesting reference bits */ | |
894 | if (madvise(ptr, len, MADV_SEQUENTIAL)) | |
895 | fatal("madvice failed: %s", name); | |
896 | ||
897 | if (pagemap_read(buf, (unsigned long)ptr / page_size, | |
898 | nr_pages) != nr_pages) | |
899 | fatal("cannot read pagemap"); | |
900 | ||
901 | munmap(ptr, len); | |
902 | ||
903 | for (i = 0; i < nr_pages; i++) { | |
904 | pfn = pagemap_pfn(buf[i]); | |
905 | if (!pfn) | |
906 | continue; | |
907 | if (!kpageflags_read(&flags, pfn, 1)) | |
908 | continue; | |
909 | if (first && opt_list) { | |
910 | first = 0; | |
911 | flush_page_range(); | |
912 | show_file(name, st); | |
913 | } | |
914 | add_page(off / page_size + i, pfn, flags, buf[i]); | |
915 | } | |
916 | } | |
917 | ||
918 | close(fd); | |
919 | } | |
920 | ||
921 | int walk_tree(const char *name, const struct stat *st, int type, struct FTW *f) | |
922 | { | |
923 | (void)f; | |
924 | switch (type) { | |
925 | case FTW_F: | |
926 | if (S_ISREG(st->st_mode)) | |
927 | walk_file(name, st); | |
928 | break; | |
929 | case FTW_DNR: | |
930 | fprintf(stderr, "cannot read dir: %s\n", name); | |
931 | break; | |
932 | } | |
933 | return 0; | |
934 | } | |
935 | ||
936 | static void walk_page_cache(void) | |
937 | { | |
938 | struct stat st; | |
939 | ||
940 | kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); | |
941 | pagemap_fd = checked_open("/proc/self/pagemap", O_RDONLY); | |
1d46598b | 942 | sigaction(SIGBUS, &sigbus_action, NULL); |
65a6a410 KK |
943 | |
944 | if (stat(opt_file, &st)) | |
945 | fatal("stat failed: %s\n", opt_file); | |
946 | ||
947 | if (S_ISREG(st.st_mode)) { | |
948 | walk_file(opt_file, &st); | |
949 | } else if (S_ISDIR(st.st_mode)) { | |
950 | /* do not follow symlinks and mountpoints */ | |
951 | if (nftw(opt_file, walk_tree, 64, FTW_MOUNT | FTW_PHYS) < 0) | |
952 | fatal("nftw failed: %s\n", opt_file); | |
953 | } else | |
954 | fatal("unhandled file type: %s\n", opt_file); | |
955 | ||
956 | close(kpageflags_fd); | |
957 | close(pagemap_fd); | |
1d46598b | 958 | signal(SIGBUS, SIG_DFL); |
65a6a410 KK |
959 | } |
960 | ||
0b4b2ad5 | 961 | static void parse_file(const char *name) |
35efa5e9 | 962 | { |
65a6a410 | 963 | opt_file = name; |
35efa5e9 WF |
964 | } |
965 | ||
b7ed698c | 966 | static void parse_addr_range(const char *optarg) |
35efa5e9 WF |
967 | { |
968 | unsigned long offset; | |
969 | unsigned long size; | |
970 | char *p; | |
971 | ||
972 | p = strchr(optarg, ','); | |
973 | if (!p) | |
974 | p = strchr(optarg, '+'); | |
975 | ||
976 | if (p == optarg) { | |
977 | offset = 0; | |
978 | size = parse_number(p + 1); | |
979 | } else if (p) { | |
980 | offset = parse_number(optarg); | |
981 | if (p[1] == '\0') | |
982 | size = ULONG_MAX; | |
983 | else { | |
984 | size = parse_number(p + 1); | |
985 | if (*p == ',') { | |
986 | if (size < offset) | |
987 | fatal("invalid range: %lu,%lu\n", | |
988 | offset, size); | |
989 | size -= offset; | |
990 | } | |
991 | } | |
992 | } else { | |
993 | offset = parse_number(optarg); | |
994 | size = 1; | |
995 | } | |
996 | ||
997 | add_addr_range(offset, size); | |
998 | } | |
999 | ||
b7ed698c | 1000 | static void add_bits_filter(uint64_t mask, uint64_t bits) |
35efa5e9 WF |
1001 | { |
1002 | if (nr_bit_filters >= MAX_BIT_FILTERS) | |
1003 | fatal("too much bit filters\n"); | |
1004 | ||
1005 | opt_mask[nr_bit_filters] = mask; | |
1006 | opt_bits[nr_bit_filters] = bits; | |
1007 | nr_bit_filters++; | |
1008 | } | |
1009 | ||
b7ed698c | 1010 | static uint64_t parse_flag_name(const char *str, int len) |
35efa5e9 | 1011 | { |
e30d539b | 1012 | size_t i; |
35efa5e9 WF |
1013 | |
1014 | if (!*str || !len) | |
1015 | return 0; | |
1016 | ||
1017 | if (len <= 8 && !strncmp(str, "compound", len)) | |
1018 | return BITS_COMPOUND; | |
1019 | ||
1020 | for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
1021 | if (!page_flag_names[i]) | |
1022 | continue; | |
1023 | if (!strncmp(str, page_flag_names[i] + 2, len)) | |
1024 | return 1ULL << i; | |
1025 | } | |
1026 | ||
1027 | return parse_number(str); | |
1028 | } | |
1029 | ||
b7ed698c | 1030 | static uint64_t parse_flag_names(const char *str, int all) |
35efa5e9 WF |
1031 | { |
1032 | const char *p = str; | |
1033 | uint64_t flags = 0; | |
1034 | ||
1035 | while (1) { | |
1036 | if (*p == ',' || *p == '=' || *p == '\0') { | |
1037 | if ((*str != '~') || (*str == '~' && all && *++str)) | |
1038 | flags |= parse_flag_name(str, p - str); | |
1039 | if (*p != ',') | |
1040 | break; | |
1041 | str = p + 1; | |
1042 | } | |
1043 | p++; | |
1044 | } | |
1045 | ||
1046 | return flags; | |
1047 | } | |
1048 | ||
b7ed698c | 1049 | static void parse_bits_mask(const char *optarg) |
35efa5e9 WF |
1050 | { |
1051 | uint64_t mask; | |
1052 | uint64_t bits; | |
1053 | const char *p; | |
1054 | ||
1055 | p = strchr(optarg, '='); | |
1056 | if (p == optarg) { | |
1057 | mask = KPF_ALL_BITS; | |
1058 | bits = parse_flag_names(p + 1, 0); | |
1059 | } else if (p) { | |
1060 | mask = parse_flag_names(optarg, 0); | |
1061 | bits = parse_flag_names(p + 1, 0); | |
1062 | } else if (strchr(optarg, '~')) { | |
1063 | mask = parse_flag_names(optarg, 1); | |
1064 | bits = parse_flag_names(optarg, 0); | |
1065 | } else { | |
1066 | mask = parse_flag_names(optarg, 0); | |
1067 | bits = KPF_ALL_BITS; | |
1068 | } | |
1069 | ||
1070 | add_bits_filter(mask, bits); | |
1071 | } | |
1072 | ||
dcfe730c AC |
1073 | static void describe_flags(const char *optarg) |
1074 | { | |
1075 | uint64_t flags = parse_flag_names(optarg, 0); | |
1076 | ||
1077 | printf("0x%016llx\t%s\t%s\n", | |
1078 | (unsigned long long)flags, | |
1079 | page_flag_name(flags), | |
1080 | page_flag_longname(flags)); | |
1081 | } | |
35efa5e9 | 1082 | |
3428838d | 1083 | static const struct option opts[] = { |
35efa5e9 WF |
1084 | { "raw" , 0, NULL, 'r' }, |
1085 | { "pid" , 1, NULL, 'p' }, | |
1086 | { "file" , 1, NULL, 'f' }, | |
1087 | { "addr" , 1, NULL, 'a' }, | |
1088 | { "bits" , 1, NULL, 'b' }, | |
dcfe730c | 1089 | { "describe" , 1, NULL, 'd' }, |
35efa5e9 WF |
1090 | { "list" , 0, NULL, 'l' }, |
1091 | { "list-each" , 0, NULL, 'L' }, | |
1092 | { "no-summary", 0, NULL, 'N' }, | |
a54fed9f WF |
1093 | { "hwpoison" , 0, NULL, 'X' }, |
1094 | { "unpoison" , 0, NULL, 'x' }, | |
35efa5e9 WF |
1095 | { "help" , 0, NULL, 'h' }, |
1096 | { NULL , 0, NULL, 0 } | |
1097 | }; | |
1098 | ||
1099 | int main(int argc, char *argv[]) | |
1100 | { | |
1101 | int c; | |
1102 | ||
1103 | page_size = getpagesize(); | |
1104 | ||
1105 | while ((c = getopt_long(argc, argv, | |
dcfe730c | 1106 | "rp:f:a:b:d:lLNXxh", opts, NULL)) != -1) { |
35efa5e9 WF |
1107 | switch (c) { |
1108 | case 'r': | |
1109 | opt_raw = 1; | |
1110 | break; | |
1111 | case 'p': | |
1112 | parse_pid(optarg); | |
1113 | break; | |
1114 | case 'f': | |
1115 | parse_file(optarg); | |
1116 | break; | |
1117 | case 'a': | |
1118 | parse_addr_range(optarg); | |
1119 | break; | |
1120 | case 'b': | |
1121 | parse_bits_mask(optarg); | |
1122 | break; | |
dcfe730c | 1123 | case 'd': |
dcfe730c | 1124 | describe_flags(optarg); |
bb86a733 | 1125 | exit(0); |
35efa5e9 WF |
1126 | case 'l': |
1127 | opt_list = 1; | |
1128 | break; | |
1129 | case 'L': | |
1130 | opt_list = 2; | |
1131 | break; | |
1132 | case 'N': | |
1133 | opt_no_summary = 1; | |
1134 | break; | |
a54fed9f WF |
1135 | case 'X': |
1136 | opt_hwpoison = 1; | |
1137 | prepare_hwpoison_fd(); | |
1138 | break; | |
1139 | case 'x': | |
1140 | opt_unpoison = 1; | |
1141 | prepare_hwpoison_fd(); | |
1142 | break; | |
35efa5e9 WF |
1143 | case 'h': |
1144 | usage(); | |
1145 | exit(0); | |
1146 | default: | |
1147 | usage(); | |
1148 | exit(1); | |
1149 | } | |
1150 | } | |
1151 | ||
0b4b2ad5 WF |
1152 | if (opt_list && opt_pid) |
1153 | printf("voffset\t"); | |
65a6a410 KK |
1154 | if (opt_list && opt_file) |
1155 | printf("foffset\t"); | |
35efa5e9 | 1156 | if (opt_list == 1) |
0b4b2ad5 | 1157 | printf("offset\tlen\tflags\n"); |
35efa5e9 WF |
1158 | if (opt_list == 2) |
1159 | printf("offset\tflags\n"); | |
1160 | ||
65a6a410 KK |
1161 | if (opt_file) |
1162 | walk_page_cache(); | |
1163 | else | |
1164 | walk_addr_ranges(); | |
35efa5e9 WF |
1165 | |
1166 | if (opt_list == 1) | |
65a6a410 | 1167 | flush_page_range(); |
35efa5e9 WF |
1168 | |
1169 | if (opt_no_summary) | |
1170 | return 0; | |
1171 | ||
1172 | if (opt_list) | |
1173 | printf("\n\n"); | |
1174 | ||
1175 | show_summary(); | |
1176 | ||
1177 | return 0; | |
1178 | } |