]>
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 | ||
deb94544 KK |
60 | #define PM_ENTRY_BYTES 8 |
61 | #define PM_PFRAME_BITS 55 | |
62 | #define PM_PFRAME_MASK ((1LL << PM_PFRAME_BITS) - 1) | |
63 | #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK) | |
64 | #define PM_SOFT_DIRTY (1ULL << 55) | |
77bb499b | 65 | #define PM_MMAP_EXCLUSIVE (1ULL << 56) |
deb94544 KK |
66 | #define PM_FILE (1ULL << 61) |
67 | #define PM_SWAP (1ULL << 62) | |
68 | #define PM_PRESENT (1ULL << 63) | |
0b4b2ad5 | 69 | |
35efa5e9 WF |
70 | /* |
71 | * kernel page flags | |
72 | */ | |
73 | ||
74 | #define KPF_BYTES 8 | |
75 | #define PROC_KPAGEFLAGS "/proc/kpageflags" | |
76 | ||
35efa5e9 WF |
77 | /* [32-] kernel hacking assistances */ |
78 | #define KPF_RESERVED 32 | |
79 | #define KPF_MLOCKED 33 | |
80 | #define KPF_MAPPEDTODISK 34 | |
81 | #define KPF_PRIVATE 35 | |
82 | #define KPF_PRIVATE_2 36 | |
83 | #define KPF_OWNER_PRIVATE 37 | |
84 | #define KPF_ARCH 38 | |
85 | #define KPF_UNCACHED 39 | |
46c77e2b | 86 | #define KPF_SOFTDIRTY 40 |
35efa5e9 WF |
87 | |
88 | /* [48-] take some arbitrary free slots for expanding overloaded flags | |
89 | * not part of kernel API | |
90 | */ | |
91 | #define KPF_READAHEAD 48 | |
92 | #define KPF_SLOB_FREE 49 | |
93 | #define KPF_SLUB_FROZEN 50 | |
94 | #define KPF_SLUB_DEBUG 51 | |
77bb499b KK |
95 | #define KPF_FILE 62 |
96 | #define KPF_MMAP_EXCLUSIVE 63 | |
35efa5e9 WF |
97 | |
98 | #define KPF_ALL_BITS ((uint64_t)~0ULL) | |
99 | #define KPF_HACKERS_BITS (0xffffULL << 32) | |
100 | #define KPF_OVERLOADED_BITS (0xffffULL << 48) | |
101 | #define BIT(name) (1ULL << KPF_##name) | |
102 | #define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL)) | |
103 | ||
c6dd897f | 104 | static const char * const page_flag_names[] = { |
35efa5e9 WF |
105 | [KPF_LOCKED] = "L:locked", |
106 | [KPF_ERROR] = "E:error", | |
107 | [KPF_REFERENCED] = "R:referenced", | |
108 | [KPF_UPTODATE] = "U:uptodate", | |
109 | [KPF_DIRTY] = "D:dirty", | |
110 | [KPF_LRU] = "l:lru", | |
111 | [KPF_ACTIVE] = "A:active", | |
112 | [KPF_SLAB] = "S:slab", | |
113 | [KPF_WRITEBACK] = "W:writeback", | |
114 | [KPF_RECLAIM] = "I:reclaim", | |
115 | [KPF_BUDDY] = "B:buddy", | |
116 | ||
117 | [KPF_MMAP] = "M:mmap", | |
118 | [KPF_ANON] = "a:anonymous", | |
119 | [KPF_SWAPCACHE] = "s:swapcache", | |
120 | [KPF_SWAPBACKED] = "b:swapbacked", | |
121 | [KPF_COMPOUND_HEAD] = "H:compound_head", | |
122 | [KPF_COMPOUND_TAIL] = "T:compound_tail", | |
123 | [KPF_HUGE] = "G:huge", | |
124 | [KPF_UNEVICTABLE] = "u:unevictable", | |
253fb02d | 125 | [KPF_HWPOISON] = "X:hwpoison", |
35efa5e9 | 126 | [KPF_NOPAGE] = "n:nopage", |
a1bbb5ec | 127 | [KPF_KSM] = "x:ksm", |
807f0ccf | 128 | [KPF_THP] = "t:thp", |
09316c09 | 129 | [KPF_BALLOON] = "o:balloon", |
56873f43 | 130 | [KPF_ZERO_PAGE] = "z:zero_page", |
35efa5e9 WF |
131 | |
132 | [KPF_RESERVED] = "r:reserved", | |
133 | [KPF_MLOCKED] = "m:mlocked", | |
134 | [KPF_MAPPEDTODISK] = "d:mappedtodisk", | |
135 | [KPF_PRIVATE] = "P:private", | |
136 | [KPF_PRIVATE_2] = "p:private_2", | |
137 | [KPF_OWNER_PRIVATE] = "O:owner_private", | |
138 | [KPF_ARCH] = "h:arch", | |
139 | [KPF_UNCACHED] = "c:uncached", | |
46c77e2b | 140 | [KPF_SOFTDIRTY] = "f:softdirty", |
35efa5e9 WF |
141 | |
142 | [KPF_READAHEAD] = "I:readahead", | |
143 | [KPF_SLOB_FREE] = "P:slob_free", | |
144 | [KPF_SLUB_FROZEN] = "A:slub_frozen", | |
145 | [KPF_SLUB_DEBUG] = "E:slub_debug", | |
77bb499b KK |
146 | |
147 | [KPF_FILE] = "F:file", | |
148 | [KPF_MMAP_EXCLUSIVE] = "1:mmap_exclusive", | |
35efa5e9 WF |
149 | }; |
150 | ||
151 | ||
c6dd897f | 152 | static const char * const debugfs_known_mountpoints[] = { |
12da58b0 CG |
153 | "/sys/kernel/debug", |
154 | "/debug", | |
155 | 0, | |
156 | }; | |
157 | ||
35efa5e9 WF |
158 | /* |
159 | * data structures | |
160 | */ | |
161 | ||
162 | static int opt_raw; /* for kernel developers */ | |
163 | static int opt_list; /* list pages (in ranges) */ | |
164 | static int opt_no_summary; /* don't show summary */ | |
165 | static pid_t opt_pid; /* process to walk */ | |
65a6a410 | 166 | const char * opt_file; |
35efa5e9 WF |
167 | |
168 | #define MAX_ADDR_RANGES 1024 | |
169 | static int nr_addr_ranges; | |
170 | static unsigned long opt_offset[MAX_ADDR_RANGES]; | |
171 | static unsigned long opt_size[MAX_ADDR_RANGES]; | |
172 | ||
0b4b2ad5 WF |
173 | #define MAX_VMAS 10240 |
174 | static int nr_vmas; | |
175 | static unsigned long pg_start[MAX_VMAS]; | |
176 | static unsigned long pg_end[MAX_VMAS]; | |
0b4b2ad5 | 177 | |
35efa5e9 WF |
178 | #define MAX_BIT_FILTERS 64 |
179 | static int nr_bit_filters; | |
180 | static uint64_t opt_mask[MAX_BIT_FILTERS]; | |
181 | static uint64_t opt_bits[MAX_BIT_FILTERS]; | |
182 | ||
183 | static int page_size; | |
184 | ||
4a1b6726 | 185 | static int pagemap_fd; |
35efa5e9 | 186 | static int kpageflags_fd; |
35efa5e9 | 187 | |
a54fed9f WF |
188 | static int opt_hwpoison; |
189 | static int opt_unpoison; | |
190 | ||
5a439645 | 191 | static char *hwpoison_debug_fs; |
a54fed9f WF |
192 | static int hwpoison_inject_fd; |
193 | static int hwpoison_forget_fd; | |
194 | ||
35efa5e9 WF |
195 | #define HASH_SHIFT 13 |
196 | #define HASH_SIZE (1 << HASH_SHIFT) | |
197 | #define HASH_MASK (HASH_SIZE - 1) | |
198 | #define HASH_KEY(flags) (flags & HASH_MASK) | |
199 | ||
200 | static unsigned long total_pages; | |
201 | static unsigned long nr_pages[HASH_SIZE]; | |
c6dd897f | 202 | static uint64_t page_flags[HASH_SIZE]; |
35efa5e9 WF |
203 | |
204 | ||
205 | /* | |
206 | * helper functions | |
207 | */ | |
208 | ||
209 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) | |
210 | ||
211 | #define min_t(type, x, y) ({ \ | |
212 | type __min1 = (x); \ | |
213 | type __min2 = (y); \ | |
214 | __min1 < __min2 ? __min1 : __min2; }) | |
215 | ||
0b4b2ad5 WF |
216 | #define max_t(type, x, y) ({ \ |
217 | type __max1 = (x); \ | |
218 | type __max2 = (y); \ | |
219 | __max1 > __max2 ? __max1 : __max2; }) | |
220 | ||
b7ed698c | 221 | static unsigned long pages2mb(unsigned long pages) |
35efa5e9 WF |
222 | { |
223 | return (pages * page_size) >> 20; | |
224 | } | |
225 | ||
b7ed698c | 226 | static void fatal(const char *x, ...) |
35efa5e9 WF |
227 | { |
228 | va_list ap; | |
229 | ||
230 | va_start(ap, x); | |
231 | vfprintf(stderr, x, ap); | |
232 | va_end(ap); | |
233 | exit(EXIT_FAILURE); | |
234 | } | |
235 | ||
1b98c00b | 236 | static int checked_open(const char *pathname, int flags) |
31bbf66e WF |
237 | { |
238 | int fd = open(pathname, flags); | |
239 | ||
240 | if (fd < 0) { | |
241 | perror(pathname); | |
242 | exit(EXIT_FAILURE); | |
243 | } | |
244 | ||
245 | return fd; | |
246 | } | |
247 | ||
4a1b6726 WF |
248 | /* |
249 | * pagemap/kpageflags routines | |
250 | */ | |
251 | ||
252 | static unsigned long do_u64_read(int fd, char *name, | |
253 | uint64_t *buf, | |
254 | unsigned long index, | |
255 | unsigned long count) | |
256 | { | |
257 | long bytes; | |
258 | ||
259 | if (index > ULONG_MAX / 8) | |
260 | fatal("index overflow: %lu\n", index); | |
261 | ||
65a6a410 | 262 | bytes = pread(fd, buf, count * 8, (off_t)index * 8); |
4a1b6726 WF |
263 | if (bytes < 0) { |
264 | perror(name); | |
265 | exit(EXIT_FAILURE); | |
266 | } | |
267 | if (bytes % 8) | |
268 | fatal("partial read: %lu bytes\n", bytes); | |
269 | ||
270 | return bytes / 8; | |
271 | } | |
272 | ||
273 | static unsigned long kpageflags_read(uint64_t *buf, | |
274 | unsigned long index, | |
275 | unsigned long pages) | |
276 | { | |
277 | return do_u64_read(kpageflags_fd, PROC_KPAGEFLAGS, buf, index, pages); | |
278 | } | |
279 | ||
280 | static unsigned long pagemap_read(uint64_t *buf, | |
281 | unsigned long index, | |
282 | unsigned long pages) | |
283 | { | |
284 | return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages); | |
285 | } | |
286 | ||
287 | static unsigned long pagemap_pfn(uint64_t val) | |
288 | { | |
289 | unsigned long pfn; | |
290 | ||
291 | if (val & PM_PRESENT) | |
292 | pfn = PM_PFRAME(val); | |
293 | else | |
294 | pfn = 0; | |
295 | ||
296 | return pfn; | |
297 | } | |
298 | ||
35efa5e9 WF |
299 | |
300 | /* | |
301 | * page flag names | |
302 | */ | |
303 | ||
b7ed698c | 304 | static char *page_flag_name(uint64_t flags) |
35efa5e9 WF |
305 | { |
306 | static char buf[65]; | |
307 | int present; | |
e30d539b | 308 | size_t i, j; |
35efa5e9 WF |
309 | |
310 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
311 | present = (flags >> i) & 1; | |
312 | if (!page_flag_names[i]) { | |
313 | if (present) | |
af901ca1 | 314 | fatal("unknown flag bit %d\n", i); |
35efa5e9 WF |
315 | continue; |
316 | } | |
317 | buf[j++] = present ? page_flag_names[i][0] : '_'; | |
318 | } | |
319 | ||
320 | return buf; | |
321 | } | |
322 | ||
b7ed698c | 323 | static char *page_flag_longname(uint64_t flags) |
35efa5e9 WF |
324 | { |
325 | static char buf[1024]; | |
e30d539b | 326 | size_t i, n; |
35efa5e9 WF |
327 | |
328 | for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
329 | if (!page_flag_names[i]) | |
330 | continue; | |
331 | if ((flags >> i) & 1) | |
332 | n += snprintf(buf + n, sizeof(buf) - n, "%s,", | |
333 | page_flag_names[i] + 2); | |
334 | } | |
335 | if (n) | |
336 | n--; | |
337 | buf[n] = '\0'; | |
338 | ||
339 | return buf; | |
340 | } | |
341 | ||
342 | ||
343 | /* | |
344 | * page list and summary | |
345 | */ | |
346 | ||
65a6a410 KK |
347 | static void show_page_range(unsigned long voffset, unsigned long offset, |
348 | unsigned long size, uint64_t flags) | |
35efa5e9 WF |
349 | { |
350 | static uint64_t flags0; | |
0b4b2ad5 | 351 | static unsigned long voff; |
35efa5e9 WF |
352 | static unsigned long index; |
353 | static unsigned long count; | |
354 | ||
0b4b2ad5 | 355 | if (flags == flags0 && offset == index + count && |
65a6a410 KK |
356 | size && voffset == voff + count) { |
357 | count += size; | |
35efa5e9 WF |
358 | return; |
359 | } | |
360 | ||
0b4b2ad5 WF |
361 | if (count) { |
362 | if (opt_pid) | |
363 | printf("%lx\t", voff); | |
65a6a410 KK |
364 | if (opt_file) |
365 | printf("%lu\t", voff); | |
0b4b2ad5 | 366 | printf("%lx\t%lx\t%s\n", |
35efa5e9 | 367 | index, count, page_flag_name(flags0)); |
0b4b2ad5 | 368 | } |
35efa5e9 WF |
369 | |
370 | flags0 = flags; | |
371 | index = offset; | |
0b4b2ad5 | 372 | voff = voffset; |
65a6a410 KK |
373 | count = size; |
374 | } | |
375 | ||
376 | static void flush_page_range(void) | |
377 | { | |
378 | show_page_range(0, 0, 0, 0); | |
35efa5e9 WF |
379 | } |
380 | ||
e577ebde WF |
381 | static void show_page(unsigned long voffset, |
382 | unsigned long offset, uint64_t flags) | |
35efa5e9 | 383 | { |
0b4b2ad5 WF |
384 | if (opt_pid) |
385 | printf("%lx\t", voffset); | |
65a6a410 KK |
386 | if (opt_file) |
387 | printf("%lu\t", voffset); | |
0b4b2ad5 | 388 | printf("%lx\t%s\n", offset, page_flag_name(flags)); |
35efa5e9 WF |
389 | } |
390 | ||
b7ed698c | 391 | static void show_summary(void) |
35efa5e9 | 392 | { |
e30d539b | 393 | size_t i; |
35efa5e9 WF |
394 | |
395 | printf(" flags\tpage-count MB" | |
396 | " symbolic-flags\t\t\tlong-symbolic-flags\n"); | |
397 | ||
398 | for (i = 0; i < ARRAY_SIZE(nr_pages); i++) { | |
399 | if (nr_pages[i]) | |
400 | printf("0x%016llx\t%10lu %8lu %s\t%s\n", | |
401 | (unsigned long long)page_flags[i], | |
402 | nr_pages[i], | |
403 | pages2mb(nr_pages[i]), | |
404 | page_flag_name(page_flags[i]), | |
405 | page_flag_longname(page_flags[i])); | |
406 | } | |
407 | ||
408 | printf(" total\t%10lu %8lu\n", | |
409 | total_pages, pages2mb(total_pages)); | |
410 | } | |
411 | ||
412 | ||
413 | /* | |
414 | * page flag filters | |
415 | */ | |
416 | ||
b7ed698c | 417 | static int bit_mask_ok(uint64_t flags) |
35efa5e9 WF |
418 | { |
419 | int i; | |
420 | ||
421 | for (i = 0; i < nr_bit_filters; i++) { | |
422 | if (opt_bits[i] == KPF_ALL_BITS) { | |
423 | if ((flags & opt_mask[i]) == 0) | |
424 | return 0; | |
425 | } else { | |
426 | if ((flags & opt_mask[i]) != opt_bits[i]) | |
427 | return 0; | |
428 | } | |
429 | } | |
430 | ||
431 | return 1; | |
432 | } | |
433 | ||
46c77e2b | 434 | static uint64_t expand_overloaded_flags(uint64_t flags, uint64_t pme) |
35efa5e9 WF |
435 | { |
436 | /* SLOB/SLUB overload several page flags */ | |
437 | if (flags & BIT(SLAB)) { | |
438 | if (flags & BIT(PRIVATE)) | |
439 | flags ^= BIT(PRIVATE) | BIT(SLOB_FREE); | |
440 | if (flags & BIT(ACTIVE)) | |
441 | flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN); | |
442 | if (flags & BIT(ERROR)) | |
443 | flags ^= BIT(ERROR) | BIT(SLUB_DEBUG); | |
444 | } | |
445 | ||
446 | /* PG_reclaim is overloaded as PG_readahead in the read path */ | |
447 | if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM)) | |
448 | flags ^= BIT(RECLAIM) | BIT(READAHEAD); | |
449 | ||
46c77e2b NH |
450 | if (pme & PM_SOFT_DIRTY) |
451 | flags |= BIT(SOFTDIRTY); | |
77bb499b KK |
452 | if (pme & PM_FILE) |
453 | flags |= BIT(FILE); | |
454 | if (pme & PM_MMAP_EXCLUSIVE) | |
455 | flags |= BIT(MMAP_EXCLUSIVE); | |
46c77e2b | 456 | |
35efa5e9 WF |
457 | return flags; |
458 | } | |
459 | ||
b7ed698c | 460 | static uint64_t well_known_flags(uint64_t flags) |
35efa5e9 WF |
461 | { |
462 | /* hide flags intended only for kernel hacker */ | |
463 | flags &= ~KPF_HACKERS_BITS; | |
464 | ||
465 | /* hide non-hugeTLB compound pages */ | |
466 | if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE))) | |
467 | flags &= ~BITS_COMPOUND; | |
468 | ||
469 | return flags; | |
470 | } | |
471 | ||
46c77e2b | 472 | static uint64_t kpageflags_flags(uint64_t flags, uint64_t pme) |
48640d69 | 473 | { |
46c77e2b NH |
474 | if (opt_raw) |
475 | flags = expand_overloaded_flags(flags, pme); | |
476 | else | |
48640d69 WF |
477 | flags = well_known_flags(flags); |
478 | ||
479 | return flags; | |
480 | } | |
481 | ||
a54fed9f WF |
482 | /* |
483 | * page actions | |
484 | */ | |
485 | ||
486 | static void prepare_hwpoison_fd(void) | |
487 | { | |
12da58b0 CG |
488 | char buf[MAX_PATH + 1]; |
489 | ||
5a439645 BP |
490 | hwpoison_debug_fs = debugfs_mount(NULL); |
491 | if (!hwpoison_debug_fs) { | |
492 | perror("mount debugfs"); | |
493 | exit(EXIT_FAILURE); | |
494 | } | |
a54fed9f WF |
495 | |
496 | if (opt_hwpoison && !hwpoison_inject_fd) { | |
12da58b0 CG |
497 | snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn", |
498 | hwpoison_debug_fs); | |
a54fed9f WF |
499 | hwpoison_inject_fd = checked_open(buf, O_WRONLY); |
500 | } | |
501 | ||
502 | if (opt_unpoison && !hwpoison_forget_fd) { | |
12da58b0 CG |
503 | snprintf(buf, MAX_PATH, "%s/hwpoison/unpoison-pfn", |
504 | hwpoison_debug_fs); | |
a54fed9f WF |
505 | hwpoison_forget_fd = checked_open(buf, O_WRONLY); |
506 | } | |
507 | } | |
508 | ||
509 | static int hwpoison_page(unsigned long offset) | |
510 | { | |
511 | char buf[100]; | |
512 | int len; | |
513 | ||
514 | len = sprintf(buf, "0x%lx\n", offset); | |
515 | len = write(hwpoison_inject_fd, buf, len); | |
516 | if (len < 0) { | |
517 | perror("hwpoison inject"); | |
518 | return len; | |
519 | } | |
520 | return 0; | |
521 | } | |
522 | ||
523 | static int unpoison_page(unsigned long offset) | |
524 | { | |
525 | char buf[100]; | |
526 | int len; | |
527 | ||
528 | len = sprintf(buf, "0x%lx\n", offset); | |
529 | len = write(hwpoison_forget_fd, buf, len); | |
530 | if (len < 0) { | |
531 | perror("hwpoison forget"); | |
532 | return len; | |
533 | } | |
534 | return 0; | |
535 | } | |
536 | ||
35efa5e9 WF |
537 | /* |
538 | * page frame walker | |
539 | */ | |
540 | ||
e30d539b | 541 | static size_t hash_slot(uint64_t flags) |
35efa5e9 | 542 | { |
e30d539b UD |
543 | size_t k = HASH_KEY(flags); |
544 | size_t i; | |
35efa5e9 WF |
545 | |
546 | /* Explicitly reserve slot 0 for flags 0: the following logic | |
547 | * cannot distinguish an unoccupied slot from slot (flags==0). | |
548 | */ | |
549 | if (flags == 0) | |
550 | return 0; | |
551 | ||
552 | /* search through the remaining (HASH_SIZE-1) slots */ | |
553 | for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) { | |
554 | if (!k || k >= ARRAY_SIZE(page_flags)) | |
555 | k = 1; | |
556 | if (page_flags[k] == 0) { | |
557 | page_flags[k] = flags; | |
558 | return k; | |
559 | } | |
560 | if (page_flags[k] == flags) | |
561 | return k; | |
562 | } | |
563 | ||
564 | fatal("hash table full: bump up HASH_SHIFT?\n"); | |
565 | exit(EXIT_FAILURE); | |
566 | } | |
567 | ||
e577ebde | 568 | static void add_page(unsigned long voffset, |
46c77e2b | 569 | unsigned long offset, uint64_t flags, uint64_t pme) |
35efa5e9 | 570 | { |
46c77e2b | 571 | flags = kpageflags_flags(flags, pme); |
35efa5e9 WF |
572 | |
573 | if (!bit_mask_ok(flags)) | |
574 | return; | |
575 | ||
a54fed9f WF |
576 | if (opt_hwpoison) |
577 | hwpoison_page(offset); | |
578 | if (opt_unpoison) | |
579 | unpoison_page(offset); | |
580 | ||
35efa5e9 | 581 | if (opt_list == 1) |
65a6a410 | 582 | show_page_range(voffset, offset, 1, flags); |
35efa5e9 | 583 | else if (opt_list == 2) |
e577ebde | 584 | show_page(voffset, offset, flags); |
35efa5e9 WF |
585 | |
586 | nr_pages[hash_slot(flags)]++; | |
587 | total_pages++; | |
588 | } | |
589 | ||
4a1b6726 | 590 | #define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */ |
e577ebde WF |
591 | static void walk_pfn(unsigned long voffset, |
592 | unsigned long index, | |
46c77e2b NH |
593 | unsigned long count, |
594 | uint64_t pme) | |
35efa5e9 | 595 | { |
4a1b6726 | 596 | uint64_t buf[KPAGEFLAGS_BATCH]; |
35efa5e9 | 597 | unsigned long batch; |
e30d539b | 598 | unsigned long pages; |
35efa5e9 WF |
599 | unsigned long i; |
600 | ||
35efa5e9 | 601 | while (count) { |
4a1b6726 WF |
602 | batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH); |
603 | pages = kpageflags_read(buf, index, batch); | |
604 | if (pages == 0) | |
35efa5e9 | 605 | break; |
35efa5e9 | 606 | |
4a1b6726 | 607 | for (i = 0; i < pages; i++) |
46c77e2b | 608 | add_page(voffset + i, index + i, buf[i], pme); |
35efa5e9 | 609 | |
4a1b6726 WF |
610 | index += pages; |
611 | count -= pages; | |
35efa5e9 WF |
612 | } |
613 | } | |
614 | ||
4a1b6726 WF |
615 | #define PAGEMAP_BATCH (64 << 10) |
616 | static void walk_vma(unsigned long index, unsigned long count) | |
0b4b2ad5 | 617 | { |
4a1b6726 WF |
618 | uint64_t buf[PAGEMAP_BATCH]; |
619 | unsigned long batch; | |
620 | unsigned long pages; | |
621 | unsigned long pfn; | |
622 | unsigned long i; | |
0b4b2ad5 | 623 | |
4a1b6726 WF |
624 | while (count) { |
625 | batch = min_t(unsigned long, count, PAGEMAP_BATCH); | |
626 | pages = pagemap_read(buf, index, batch); | |
627 | if (pages == 0) | |
628 | break; | |
0b4b2ad5 | 629 | |
4a1b6726 WF |
630 | for (i = 0; i < pages; i++) { |
631 | pfn = pagemap_pfn(buf[i]); | |
4a1b6726 | 632 | if (pfn) |
46c77e2b | 633 | walk_pfn(index + i, pfn, 1, buf[i]); |
4a1b6726 WF |
634 | } |
635 | ||
636 | index += pages; | |
637 | count -= pages; | |
638 | } | |
0b4b2ad5 WF |
639 | } |
640 | ||
641 | static void walk_task(unsigned long index, unsigned long count) | |
642 | { | |
0b4b2ad5 | 643 | const unsigned long end = index + count; |
e577ebde WF |
644 | unsigned long start; |
645 | int i = 0; | |
0b4b2ad5 WF |
646 | |
647 | while (index < end) { | |
648 | ||
649 | while (pg_end[i] <= index) | |
650 | if (++i >= nr_vmas) | |
651 | return; | |
652 | if (pg_start[i] >= end) | |
653 | return; | |
654 | ||
e577ebde WF |
655 | start = max_t(unsigned long, pg_start[i], index); |
656 | index = min_t(unsigned long, pg_end[i], end); | |
0b4b2ad5 | 657 | |
e577ebde WF |
658 | assert(start < index); |
659 | walk_vma(start, index - start); | |
0b4b2ad5 WF |
660 | } |
661 | } | |
662 | ||
663 | static void add_addr_range(unsigned long offset, unsigned long size) | |
664 | { | |
665 | if (nr_addr_ranges >= MAX_ADDR_RANGES) | |
666 | fatal("too many addr ranges\n"); | |
667 | ||
668 | opt_offset[nr_addr_ranges] = offset; | |
669 | opt_size[nr_addr_ranges] = min_t(unsigned long, size, ULONG_MAX-offset); | |
670 | nr_addr_ranges++; | |
671 | } | |
672 | ||
b7ed698c | 673 | static void walk_addr_ranges(void) |
35efa5e9 WF |
674 | { |
675 | int i; | |
676 | ||
31bbf66e | 677 | kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); |
35efa5e9 WF |
678 | |
679 | if (!nr_addr_ranges) | |
0b4b2ad5 | 680 | add_addr_range(0, ULONG_MAX); |
35efa5e9 WF |
681 | |
682 | for (i = 0; i < nr_addr_ranges; i++) | |
0b4b2ad5 | 683 | if (!opt_pid) |
65a6a410 | 684 | walk_pfn(opt_offset[i], opt_offset[i], opt_size[i], 0); |
0b4b2ad5 WF |
685 | else |
686 | walk_task(opt_offset[i], opt_size[i]); | |
35efa5e9 WF |
687 | |
688 | close(kpageflags_fd); | |
689 | } | |
690 | ||
691 | ||
692 | /* | |
693 | * user interface | |
694 | */ | |
695 | ||
b7ed698c | 696 | static const char *page_flag_type(uint64_t flag) |
35efa5e9 WF |
697 | { |
698 | if (flag & KPF_HACKERS_BITS) | |
699 | return "(r)"; | |
700 | if (flag & KPF_OVERLOADED_BITS) | |
701 | return "(o)"; | |
702 | return " "; | |
703 | } | |
704 | ||
b7ed698c | 705 | static void usage(void) |
35efa5e9 | 706 | { |
e30d539b | 707 | size_t i, j; |
35efa5e9 WF |
708 | |
709 | printf( | |
710 | "page-types [options]\n" | |
9fdcd886 | 711 | " -r|--raw Raw mode, for kernel developers\n" |
dcfe730c | 712 | " -d|--describe flags Describe flags\n" |
9fdcd886 AC |
713 | " -a|--addr addr-spec Walk a range of pages\n" |
714 | " -b|--bits bits-spec Walk pages with specified bits\n" | |
715 | " -p|--pid pid Walk process address space\n" | |
9fdcd886 | 716 | " -f|--file filename Walk file address space\n" |
9fdcd886 AC |
717 | " -l|--list Show page details in ranges\n" |
718 | " -L|--list-each Show page details one by one\n" | |
c7825cfa | 719 | " -N|--no-summary Don't show summary info\n" |
9fdcd886 AC |
720 | " -X|--hwpoison hwpoison pages\n" |
721 | " -x|--unpoison unpoison pages\n" | |
722 | " -h|--help Show this usage message\n" | |
dcfe730c | 723 | "flags:\n" |
9fdcd886 AC |
724 | " 0x10 bitfield format, e.g.\n" |
725 | " anon bit-name, e.g.\n" | |
726 | " 0x10,anon comma-separated list, e.g.\n" | |
35efa5e9 | 727 | "addr-spec:\n" |
9fdcd886 AC |
728 | " N one page at offset N (unit: pages)\n" |
729 | " N+M pages range from N to N+M-1\n" | |
730 | " N,M pages range from N to M-1\n" | |
731 | " N, pages range from N to end\n" | |
732 | " ,M pages range from 0 to M-1\n" | |
35efa5e9 | 733 | "bits-spec:\n" |
9fdcd886 AC |
734 | " bit1,bit2 (flags & (bit1|bit2)) != 0\n" |
735 | " bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n" | |
736 | " bit1,~bit2 (flags & (bit1|bit2)) == bit1\n" | |
737 | " =bit1,bit2 flags == (bit1|bit2)\n" | |
35efa5e9 WF |
738 | "bit-names:\n" |
739 | ); | |
740 | ||
741 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
742 | if (!page_flag_names[i]) | |
743 | continue; | |
744 | printf("%16s%s", page_flag_names[i] + 2, | |
745 | page_flag_type(1ULL << i)); | |
746 | if (++j > 3) { | |
747 | j = 0; | |
748 | putchar('\n'); | |
749 | } | |
750 | } | |
751 | printf("\n " | |
752 | "(r) raw mode bits (o) overloaded bits\n"); | |
753 | } | |
754 | ||
b7ed698c | 755 | static unsigned long long parse_number(const char *str) |
35efa5e9 WF |
756 | { |
757 | unsigned long long n; | |
758 | ||
759 | n = strtoll(str, NULL, 0); | |
760 | ||
761 | if (n == 0 && str[0] != '0') | |
762 | fatal("invalid name or number: %s\n", str); | |
763 | ||
764 | return n; | |
765 | } | |
766 | ||
b7ed698c | 767 | static void parse_pid(const char *str) |
35efa5e9 | 768 | { |
0b4b2ad5 WF |
769 | FILE *file; |
770 | char buf[5000]; | |
771 | ||
35efa5e9 | 772 | opt_pid = parse_number(str); |
35efa5e9 | 773 | |
0b4b2ad5 | 774 | sprintf(buf, "/proc/%d/pagemap", opt_pid); |
31bbf66e | 775 | pagemap_fd = checked_open(buf, O_RDONLY); |
0b4b2ad5 WF |
776 | |
777 | sprintf(buf, "/proc/%d/maps", opt_pid); | |
778 | file = fopen(buf, "r"); | |
779 | if (!file) { | |
780 | perror(buf); | |
781 | exit(EXIT_FAILURE); | |
782 | } | |
783 | ||
784 | while (fgets(buf, sizeof(buf), file) != NULL) { | |
785 | unsigned long vm_start; | |
786 | unsigned long vm_end; | |
787 | unsigned long long pgoff; | |
788 | int major, minor; | |
789 | char r, w, x, s; | |
790 | unsigned long ino; | |
791 | int n; | |
792 | ||
793 | n = sscanf(buf, "%lx-%lx %c%c%c%c %llx %x:%x %lu", | |
794 | &vm_start, | |
795 | &vm_end, | |
796 | &r, &w, &x, &s, | |
797 | &pgoff, | |
798 | &major, &minor, | |
799 | &ino); | |
800 | if (n < 10) { | |
801 | fprintf(stderr, "unexpected line: %s\n", buf); | |
802 | continue; | |
803 | } | |
804 | pg_start[nr_vmas] = vm_start / page_size; | |
805 | pg_end[nr_vmas] = vm_end / page_size; | |
806 | if (++nr_vmas >= MAX_VMAS) { | |
807 | fprintf(stderr, "too many VMAs\n"); | |
808 | break; | |
809 | } | |
810 | } | |
811 | fclose(file); | |
35efa5e9 WF |
812 | } |
813 | ||
65a6a410 KK |
814 | static void show_file(const char *name, const struct stat *st) |
815 | { | |
816 | unsigned long long size = st->st_size; | |
817 | char atime[64], mtime[64]; | |
818 | long now = time(NULL); | |
819 | ||
820 | printf("%s\tInode: %u\tSize: %llu (%llu pages)\n", | |
821 | name, (unsigned)st->st_ino, | |
822 | size, (size + page_size - 1) / page_size); | |
823 | ||
824 | strftime(atime, sizeof(atime), "%c", localtime(&st->st_atime)); | |
825 | strftime(mtime, sizeof(mtime), "%c", localtime(&st->st_mtime)); | |
826 | ||
827 | printf("Modify: %s (%ld seconds ago)\nAccess: %s (%ld seconds ago)\n", | |
828 | mtime, now - st->st_mtime, | |
829 | atime, now - st->st_atime); | |
830 | } | |
831 | ||
1d46598b KK |
832 | static sigjmp_buf sigbus_jmp; |
833 | ||
834 | static void * volatile sigbus_addr; | |
835 | ||
836 | static void sigbus_handler(int sig, siginfo_t *info, void *ucontex) | |
837 | { | |
838 | (void)sig; | |
839 | (void)ucontex; | |
840 | sigbus_addr = info ? info->si_addr : NULL; | |
841 | siglongjmp(sigbus_jmp, 1); | |
842 | } | |
843 | ||
844 | static struct sigaction sigbus_action = { | |
845 | .sa_sigaction = sigbus_handler, | |
846 | .sa_flags = SA_SIGINFO, | |
847 | }; | |
848 | ||
65a6a410 KK |
849 | static void walk_file(const char *name, const struct stat *st) |
850 | { | |
851 | uint8_t vec[PAGEMAP_BATCH]; | |
852 | uint64_t buf[PAGEMAP_BATCH], flags; | |
853 | unsigned long nr_pages, pfn, i; | |
1d46598b | 854 | off_t off, end = st->st_size; |
65a6a410 | 855 | int fd; |
65a6a410 KK |
856 | ssize_t len; |
857 | void *ptr; | |
858 | int first = 1; | |
859 | ||
860 | fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW); | |
861 | ||
1d46598b KK |
862 | for (off = 0; off < end; off += len) { |
863 | nr_pages = (end - off + page_size - 1) / page_size; | |
65a6a410 KK |
864 | if (nr_pages > PAGEMAP_BATCH) |
865 | nr_pages = PAGEMAP_BATCH; | |
866 | len = nr_pages * page_size; | |
867 | ||
868 | ptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, off); | |
869 | if (ptr == MAP_FAILED) | |
870 | fatal("mmap failed: %s", name); | |
871 | ||
872 | /* determine cached pages */ | |
873 | if (mincore(ptr, len, vec)) | |
874 | fatal("mincore failed: %s", name); | |
875 | ||
876 | /* turn off readahead */ | |
877 | if (madvise(ptr, len, MADV_RANDOM)) | |
878 | fatal("madvice failed: %s", name); | |
879 | ||
1d46598b KK |
880 | if (sigsetjmp(sigbus_jmp, 1)) { |
881 | end = off + sigbus_addr ? sigbus_addr - ptr : 0; | |
882 | fprintf(stderr, "got sigbus at offset %lld: %s\n", | |
883 | (long long)end, name); | |
884 | goto got_sigbus; | |
885 | } | |
886 | ||
65a6a410 KK |
887 | /* populate ptes */ |
888 | for (i = 0; i < nr_pages ; i++) { | |
889 | if (vec[i] & 1) | |
890 | (void)*(volatile int *)(ptr + i * page_size); | |
891 | } | |
1d46598b | 892 | got_sigbus: |
65a6a410 KK |
893 | |
894 | /* turn off harvesting reference bits */ | |
895 | if (madvise(ptr, len, MADV_SEQUENTIAL)) | |
896 | fatal("madvice failed: %s", name); | |
897 | ||
898 | if (pagemap_read(buf, (unsigned long)ptr / page_size, | |
899 | nr_pages) != nr_pages) | |
900 | fatal("cannot read pagemap"); | |
901 | ||
902 | munmap(ptr, len); | |
903 | ||
904 | for (i = 0; i < nr_pages; i++) { | |
905 | pfn = pagemap_pfn(buf[i]); | |
906 | if (!pfn) | |
907 | continue; | |
908 | if (!kpageflags_read(&flags, pfn, 1)) | |
909 | continue; | |
910 | if (first && opt_list) { | |
911 | first = 0; | |
912 | flush_page_range(); | |
913 | show_file(name, st); | |
914 | } | |
915 | add_page(off / page_size + i, pfn, flags, buf[i]); | |
916 | } | |
917 | } | |
918 | ||
919 | close(fd); | |
920 | } | |
921 | ||
922 | int walk_tree(const char *name, const struct stat *st, int type, struct FTW *f) | |
923 | { | |
924 | (void)f; | |
925 | switch (type) { | |
926 | case FTW_F: | |
927 | if (S_ISREG(st->st_mode)) | |
928 | walk_file(name, st); | |
929 | break; | |
930 | case FTW_DNR: | |
931 | fprintf(stderr, "cannot read dir: %s\n", name); | |
932 | break; | |
933 | } | |
934 | return 0; | |
935 | } | |
936 | ||
937 | static void walk_page_cache(void) | |
938 | { | |
939 | struct stat st; | |
940 | ||
941 | kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); | |
942 | pagemap_fd = checked_open("/proc/self/pagemap", O_RDONLY); | |
1d46598b | 943 | sigaction(SIGBUS, &sigbus_action, NULL); |
65a6a410 KK |
944 | |
945 | if (stat(opt_file, &st)) | |
946 | fatal("stat failed: %s\n", opt_file); | |
947 | ||
948 | if (S_ISREG(st.st_mode)) { | |
949 | walk_file(opt_file, &st); | |
950 | } else if (S_ISDIR(st.st_mode)) { | |
951 | /* do not follow symlinks and mountpoints */ | |
952 | if (nftw(opt_file, walk_tree, 64, FTW_MOUNT | FTW_PHYS) < 0) | |
953 | fatal("nftw failed: %s\n", opt_file); | |
954 | } else | |
955 | fatal("unhandled file type: %s\n", opt_file); | |
956 | ||
957 | close(kpageflags_fd); | |
958 | close(pagemap_fd); | |
1d46598b | 959 | signal(SIGBUS, SIG_DFL); |
65a6a410 KK |
960 | } |
961 | ||
0b4b2ad5 | 962 | static void parse_file(const char *name) |
35efa5e9 | 963 | { |
65a6a410 | 964 | opt_file = name; |
35efa5e9 WF |
965 | } |
966 | ||
b7ed698c | 967 | static void parse_addr_range(const char *optarg) |
35efa5e9 WF |
968 | { |
969 | unsigned long offset; | |
970 | unsigned long size; | |
971 | char *p; | |
972 | ||
973 | p = strchr(optarg, ','); | |
974 | if (!p) | |
975 | p = strchr(optarg, '+'); | |
976 | ||
977 | if (p == optarg) { | |
978 | offset = 0; | |
979 | size = parse_number(p + 1); | |
980 | } else if (p) { | |
981 | offset = parse_number(optarg); | |
982 | if (p[1] == '\0') | |
983 | size = ULONG_MAX; | |
984 | else { | |
985 | size = parse_number(p + 1); | |
986 | if (*p == ',') { | |
987 | if (size < offset) | |
988 | fatal("invalid range: %lu,%lu\n", | |
989 | offset, size); | |
990 | size -= offset; | |
991 | } | |
992 | } | |
993 | } else { | |
994 | offset = parse_number(optarg); | |
995 | size = 1; | |
996 | } | |
997 | ||
998 | add_addr_range(offset, size); | |
999 | } | |
1000 | ||
b7ed698c | 1001 | static void add_bits_filter(uint64_t mask, uint64_t bits) |
35efa5e9 WF |
1002 | { |
1003 | if (nr_bit_filters >= MAX_BIT_FILTERS) | |
1004 | fatal("too much bit filters\n"); | |
1005 | ||
1006 | opt_mask[nr_bit_filters] = mask; | |
1007 | opt_bits[nr_bit_filters] = bits; | |
1008 | nr_bit_filters++; | |
1009 | } | |
1010 | ||
b7ed698c | 1011 | static uint64_t parse_flag_name(const char *str, int len) |
35efa5e9 | 1012 | { |
e30d539b | 1013 | size_t i; |
35efa5e9 WF |
1014 | |
1015 | if (!*str || !len) | |
1016 | return 0; | |
1017 | ||
1018 | if (len <= 8 && !strncmp(str, "compound", len)) | |
1019 | return BITS_COMPOUND; | |
1020 | ||
1021 | for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
1022 | if (!page_flag_names[i]) | |
1023 | continue; | |
1024 | if (!strncmp(str, page_flag_names[i] + 2, len)) | |
1025 | return 1ULL << i; | |
1026 | } | |
1027 | ||
1028 | return parse_number(str); | |
1029 | } | |
1030 | ||
b7ed698c | 1031 | static uint64_t parse_flag_names(const char *str, int all) |
35efa5e9 WF |
1032 | { |
1033 | const char *p = str; | |
1034 | uint64_t flags = 0; | |
1035 | ||
1036 | while (1) { | |
1037 | if (*p == ',' || *p == '=' || *p == '\0') { | |
1038 | if ((*str != '~') || (*str == '~' && all && *++str)) | |
1039 | flags |= parse_flag_name(str, p - str); | |
1040 | if (*p != ',') | |
1041 | break; | |
1042 | str = p + 1; | |
1043 | } | |
1044 | p++; | |
1045 | } | |
1046 | ||
1047 | return flags; | |
1048 | } | |
1049 | ||
b7ed698c | 1050 | static void parse_bits_mask(const char *optarg) |
35efa5e9 WF |
1051 | { |
1052 | uint64_t mask; | |
1053 | uint64_t bits; | |
1054 | const char *p; | |
1055 | ||
1056 | p = strchr(optarg, '='); | |
1057 | if (p == optarg) { | |
1058 | mask = KPF_ALL_BITS; | |
1059 | bits = parse_flag_names(p + 1, 0); | |
1060 | } else if (p) { | |
1061 | mask = parse_flag_names(optarg, 0); | |
1062 | bits = parse_flag_names(p + 1, 0); | |
1063 | } else if (strchr(optarg, '~')) { | |
1064 | mask = parse_flag_names(optarg, 1); | |
1065 | bits = parse_flag_names(optarg, 0); | |
1066 | } else { | |
1067 | mask = parse_flag_names(optarg, 0); | |
1068 | bits = KPF_ALL_BITS; | |
1069 | } | |
1070 | ||
1071 | add_bits_filter(mask, bits); | |
1072 | } | |
1073 | ||
dcfe730c AC |
1074 | static void describe_flags(const char *optarg) |
1075 | { | |
1076 | uint64_t flags = parse_flag_names(optarg, 0); | |
1077 | ||
1078 | printf("0x%016llx\t%s\t%s\n", | |
1079 | (unsigned long long)flags, | |
1080 | page_flag_name(flags), | |
1081 | page_flag_longname(flags)); | |
1082 | } | |
35efa5e9 | 1083 | |
3428838d | 1084 | static const struct option opts[] = { |
35efa5e9 WF |
1085 | { "raw" , 0, NULL, 'r' }, |
1086 | { "pid" , 1, NULL, 'p' }, | |
1087 | { "file" , 1, NULL, 'f' }, | |
1088 | { "addr" , 1, NULL, 'a' }, | |
1089 | { "bits" , 1, NULL, 'b' }, | |
dcfe730c | 1090 | { "describe" , 1, NULL, 'd' }, |
35efa5e9 WF |
1091 | { "list" , 0, NULL, 'l' }, |
1092 | { "list-each" , 0, NULL, 'L' }, | |
1093 | { "no-summary", 0, NULL, 'N' }, | |
a54fed9f WF |
1094 | { "hwpoison" , 0, NULL, 'X' }, |
1095 | { "unpoison" , 0, NULL, 'x' }, | |
35efa5e9 WF |
1096 | { "help" , 0, NULL, 'h' }, |
1097 | { NULL , 0, NULL, 0 } | |
1098 | }; | |
1099 | ||
1100 | int main(int argc, char *argv[]) | |
1101 | { | |
1102 | int c; | |
1103 | ||
1104 | page_size = getpagesize(); | |
1105 | ||
1106 | while ((c = getopt_long(argc, argv, | |
dcfe730c | 1107 | "rp:f:a:b:d:lLNXxh", opts, NULL)) != -1) { |
35efa5e9 WF |
1108 | switch (c) { |
1109 | case 'r': | |
1110 | opt_raw = 1; | |
1111 | break; | |
1112 | case 'p': | |
1113 | parse_pid(optarg); | |
1114 | break; | |
1115 | case 'f': | |
1116 | parse_file(optarg); | |
1117 | break; | |
1118 | case 'a': | |
1119 | parse_addr_range(optarg); | |
1120 | break; | |
1121 | case 'b': | |
1122 | parse_bits_mask(optarg); | |
1123 | break; | |
dcfe730c | 1124 | case 'd': |
dcfe730c | 1125 | describe_flags(optarg); |
bb86a733 | 1126 | exit(0); |
35efa5e9 WF |
1127 | case 'l': |
1128 | opt_list = 1; | |
1129 | break; | |
1130 | case 'L': | |
1131 | opt_list = 2; | |
1132 | break; | |
1133 | case 'N': | |
1134 | opt_no_summary = 1; | |
1135 | break; | |
a54fed9f WF |
1136 | case 'X': |
1137 | opt_hwpoison = 1; | |
1138 | prepare_hwpoison_fd(); | |
1139 | break; | |
1140 | case 'x': | |
1141 | opt_unpoison = 1; | |
1142 | prepare_hwpoison_fd(); | |
1143 | break; | |
35efa5e9 WF |
1144 | case 'h': |
1145 | usage(); | |
1146 | exit(0); | |
1147 | default: | |
1148 | usage(); | |
1149 | exit(1); | |
1150 | } | |
1151 | } | |
1152 | ||
0b4b2ad5 WF |
1153 | if (opt_list && opt_pid) |
1154 | printf("voffset\t"); | |
65a6a410 KK |
1155 | if (opt_list && opt_file) |
1156 | printf("foffset\t"); | |
35efa5e9 | 1157 | if (opt_list == 1) |
0b4b2ad5 | 1158 | printf("offset\tlen\tflags\n"); |
35efa5e9 WF |
1159 | if (opt_list == 2) |
1160 | printf("offset\tflags\n"); | |
1161 | ||
65a6a410 KK |
1162 | if (opt_file) |
1163 | walk_page_cache(); | |
1164 | else | |
1165 | walk_addr_ranges(); | |
35efa5e9 WF |
1166 | |
1167 | if (opt_list == 1) | |
65a6a410 | 1168 | flush_page_range(); |
35efa5e9 WF |
1169 | |
1170 | if (opt_no_summary) | |
1171 | return 0; | |
1172 | ||
1173 | if (opt_list) | |
1174 | printf("\n\n"); | |
1175 | ||
1176 | show_summary(); | |
1177 | ||
1178 | return 0; | |
1179 | } |