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Commit | Line | Data |
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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" |
f6489bc2 | 45 | #include <api/fs/fs.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) | |
0335ddd3 NH |
64 | #define MAX_SWAPFILES_SHIFT 5 |
65 | #define PM_SWAP_OFFSET(x) (((x) & PM_PFRAME_MASK) >> MAX_SWAPFILES_SHIFT) | |
deb94544 | 66 | #define PM_SOFT_DIRTY (1ULL << 55) |
77bb499b | 67 | #define PM_MMAP_EXCLUSIVE (1ULL << 56) |
deb94544 KK |
68 | #define PM_FILE (1ULL << 61) |
69 | #define PM_SWAP (1ULL << 62) | |
70 | #define PM_PRESENT (1ULL << 63) | |
0b4b2ad5 | 71 | |
35efa5e9 WF |
72 | /* |
73 | * kernel page flags | |
74 | */ | |
75 | ||
76 | #define KPF_BYTES 8 | |
77 | #define PROC_KPAGEFLAGS "/proc/kpageflags" | |
075db150 | 78 | #define PROC_KPAGECGROUP "/proc/kpagecgroup" |
35efa5e9 | 79 | |
35efa5e9 WF |
80 | /* [32-] kernel hacking assistances */ |
81 | #define KPF_RESERVED 32 | |
82 | #define KPF_MLOCKED 33 | |
83 | #define KPF_MAPPEDTODISK 34 | |
84 | #define KPF_PRIVATE 35 | |
85 | #define KPF_PRIVATE_2 36 | |
86 | #define KPF_OWNER_PRIVATE 37 | |
87 | #define KPF_ARCH 38 | |
88 | #define KPF_UNCACHED 39 | |
46c77e2b | 89 | #define KPF_SOFTDIRTY 40 |
35efa5e9 WF |
90 | |
91 | /* [48-] take some arbitrary free slots for expanding overloaded flags | |
92 | * not part of kernel API | |
93 | */ | |
94 | #define KPF_READAHEAD 48 | |
95 | #define KPF_SLOB_FREE 49 | |
96 | #define KPF_SLUB_FROZEN 50 | |
97 | #define KPF_SLUB_DEBUG 51 | |
0335ddd3 NH |
98 | #define KPF_FILE 61 |
99 | #define KPF_SWAP 62 | |
77bb499b | 100 | #define KPF_MMAP_EXCLUSIVE 63 |
35efa5e9 WF |
101 | |
102 | #define KPF_ALL_BITS ((uint64_t)~0ULL) | |
103 | #define KPF_HACKERS_BITS (0xffffULL << 32) | |
104 | #define KPF_OVERLOADED_BITS (0xffffULL << 48) | |
105 | #define BIT(name) (1ULL << KPF_##name) | |
106 | #define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL)) | |
107 | ||
c6dd897f | 108 | static const char * const page_flag_names[] = { |
35efa5e9 WF |
109 | [KPF_LOCKED] = "L:locked", |
110 | [KPF_ERROR] = "E:error", | |
111 | [KPF_REFERENCED] = "R:referenced", | |
112 | [KPF_UPTODATE] = "U:uptodate", | |
113 | [KPF_DIRTY] = "D:dirty", | |
114 | [KPF_LRU] = "l:lru", | |
115 | [KPF_ACTIVE] = "A:active", | |
116 | [KPF_SLAB] = "S:slab", | |
117 | [KPF_WRITEBACK] = "W:writeback", | |
118 | [KPF_RECLAIM] = "I:reclaim", | |
119 | [KPF_BUDDY] = "B:buddy", | |
120 | ||
121 | [KPF_MMAP] = "M:mmap", | |
122 | [KPF_ANON] = "a:anonymous", | |
123 | [KPF_SWAPCACHE] = "s:swapcache", | |
124 | [KPF_SWAPBACKED] = "b:swapbacked", | |
125 | [KPF_COMPOUND_HEAD] = "H:compound_head", | |
126 | [KPF_COMPOUND_TAIL] = "T:compound_tail", | |
127 | [KPF_HUGE] = "G:huge", | |
128 | [KPF_UNEVICTABLE] = "u:unevictable", | |
253fb02d | 129 | [KPF_HWPOISON] = "X:hwpoison", |
35efa5e9 | 130 | [KPF_NOPAGE] = "n:nopage", |
a1bbb5ec | 131 | [KPF_KSM] = "x:ksm", |
807f0ccf | 132 | [KPF_THP] = "t:thp", |
09316c09 | 133 | [KPF_BALLOON] = "o:balloon", |
56873f43 | 134 | [KPF_ZERO_PAGE] = "z:zero_page", |
429d4862 | 135 | [KPF_IDLE] = "i:idle_page", |
35efa5e9 WF |
136 | |
137 | [KPF_RESERVED] = "r:reserved", | |
138 | [KPF_MLOCKED] = "m:mlocked", | |
139 | [KPF_MAPPEDTODISK] = "d:mappedtodisk", | |
140 | [KPF_PRIVATE] = "P:private", | |
141 | [KPF_PRIVATE_2] = "p:private_2", | |
142 | [KPF_OWNER_PRIVATE] = "O:owner_private", | |
143 | [KPF_ARCH] = "h:arch", | |
144 | [KPF_UNCACHED] = "c:uncached", | |
46c77e2b | 145 | [KPF_SOFTDIRTY] = "f:softdirty", |
35efa5e9 WF |
146 | |
147 | [KPF_READAHEAD] = "I:readahead", | |
148 | [KPF_SLOB_FREE] = "P:slob_free", | |
149 | [KPF_SLUB_FROZEN] = "A:slub_frozen", | |
150 | [KPF_SLUB_DEBUG] = "E:slub_debug", | |
77bb499b KK |
151 | |
152 | [KPF_FILE] = "F:file", | |
0335ddd3 | 153 | [KPF_SWAP] = "w:swap", |
77bb499b | 154 | [KPF_MMAP_EXCLUSIVE] = "1:mmap_exclusive", |
35efa5e9 WF |
155 | }; |
156 | ||
157 | ||
c6dd897f | 158 | static const char * const debugfs_known_mountpoints[] = { |
12da58b0 CG |
159 | "/sys/kernel/debug", |
160 | "/debug", | |
161 | 0, | |
162 | }; | |
163 | ||
35efa5e9 WF |
164 | /* |
165 | * data structures | |
166 | */ | |
167 | ||
168 | static int opt_raw; /* for kernel developers */ | |
169 | static int opt_list; /* list pages (in ranges) */ | |
170 | static int opt_no_summary; /* don't show summary */ | |
171 | static pid_t opt_pid; /* process to walk */ | |
075db150 KK |
172 | const char * opt_file; /* file or directory path */ |
173 | static uint64_t opt_cgroup; /* cgroup inode */ | |
174 | static int opt_list_cgroup;/* list page cgroup */ | |
35efa5e9 WF |
175 | |
176 | #define MAX_ADDR_RANGES 1024 | |
177 | static int nr_addr_ranges; | |
178 | static unsigned long opt_offset[MAX_ADDR_RANGES]; | |
179 | static unsigned long opt_size[MAX_ADDR_RANGES]; | |
180 | ||
0b4b2ad5 WF |
181 | #define MAX_VMAS 10240 |
182 | static int nr_vmas; | |
183 | static unsigned long pg_start[MAX_VMAS]; | |
184 | static unsigned long pg_end[MAX_VMAS]; | |
0b4b2ad5 | 185 | |
35efa5e9 WF |
186 | #define MAX_BIT_FILTERS 64 |
187 | static int nr_bit_filters; | |
188 | static uint64_t opt_mask[MAX_BIT_FILTERS]; | |
189 | static uint64_t opt_bits[MAX_BIT_FILTERS]; | |
190 | ||
191 | static int page_size; | |
192 | ||
4a1b6726 | 193 | static int pagemap_fd; |
35efa5e9 | 194 | static int kpageflags_fd; |
075db150 | 195 | static int kpagecgroup_fd = -1; |
35efa5e9 | 196 | |
a54fed9f WF |
197 | static int opt_hwpoison; |
198 | static int opt_unpoison; | |
199 | ||
f6489bc2 | 200 | static const char *hwpoison_debug_fs; |
a54fed9f WF |
201 | static int hwpoison_inject_fd; |
202 | static int hwpoison_forget_fd; | |
203 | ||
35efa5e9 WF |
204 | #define HASH_SHIFT 13 |
205 | #define HASH_SIZE (1 << HASH_SHIFT) | |
206 | #define HASH_MASK (HASH_SIZE - 1) | |
207 | #define HASH_KEY(flags) (flags & HASH_MASK) | |
208 | ||
209 | static unsigned long total_pages; | |
210 | static unsigned long nr_pages[HASH_SIZE]; | |
c6dd897f | 211 | static uint64_t page_flags[HASH_SIZE]; |
35efa5e9 WF |
212 | |
213 | ||
214 | /* | |
215 | * helper functions | |
216 | */ | |
217 | ||
218 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) | |
219 | ||
220 | #define min_t(type, x, y) ({ \ | |
221 | type __min1 = (x); \ | |
222 | type __min2 = (y); \ | |
223 | __min1 < __min2 ? __min1 : __min2; }) | |
224 | ||
0b4b2ad5 WF |
225 | #define max_t(type, x, y) ({ \ |
226 | type __max1 = (x); \ | |
227 | type __max2 = (y); \ | |
228 | __max1 > __max2 ? __max1 : __max2; }) | |
229 | ||
b7ed698c | 230 | static unsigned long pages2mb(unsigned long pages) |
35efa5e9 WF |
231 | { |
232 | return (pages * page_size) >> 20; | |
233 | } | |
234 | ||
b7ed698c | 235 | static void fatal(const char *x, ...) |
35efa5e9 WF |
236 | { |
237 | va_list ap; | |
238 | ||
239 | va_start(ap, x); | |
240 | vfprintf(stderr, x, ap); | |
241 | va_end(ap); | |
242 | exit(EXIT_FAILURE); | |
243 | } | |
244 | ||
1b98c00b | 245 | static int checked_open(const char *pathname, int flags) |
31bbf66e WF |
246 | { |
247 | int fd = open(pathname, flags); | |
248 | ||
249 | if (fd < 0) { | |
250 | perror(pathname); | |
251 | exit(EXIT_FAILURE); | |
252 | } | |
253 | ||
254 | return fd; | |
255 | } | |
256 | ||
4a1b6726 WF |
257 | /* |
258 | * pagemap/kpageflags routines | |
259 | */ | |
260 | ||
261 | static unsigned long do_u64_read(int fd, char *name, | |
262 | uint64_t *buf, | |
263 | unsigned long index, | |
264 | unsigned long count) | |
265 | { | |
266 | long bytes; | |
267 | ||
268 | if (index > ULONG_MAX / 8) | |
269 | fatal("index overflow: %lu\n", index); | |
270 | ||
65a6a410 | 271 | bytes = pread(fd, buf, count * 8, (off_t)index * 8); |
4a1b6726 WF |
272 | if (bytes < 0) { |
273 | perror(name); | |
274 | exit(EXIT_FAILURE); | |
275 | } | |
276 | if (bytes % 8) | |
277 | fatal("partial read: %lu bytes\n", bytes); | |
278 | ||
279 | return bytes / 8; | |
280 | } | |
281 | ||
282 | static unsigned long kpageflags_read(uint64_t *buf, | |
283 | unsigned long index, | |
284 | unsigned long pages) | |
285 | { | |
286 | return do_u64_read(kpageflags_fd, PROC_KPAGEFLAGS, buf, index, pages); | |
287 | } | |
288 | ||
075db150 KK |
289 | static unsigned long kpagecgroup_read(uint64_t *buf, |
290 | unsigned long index, | |
291 | unsigned long pages) | |
292 | { | |
293 | if (kpagecgroup_fd < 0) | |
294 | return pages; | |
295 | ||
296 | return do_u64_read(kpagecgroup_fd, PROC_KPAGEFLAGS, buf, index, pages); | |
297 | } | |
298 | ||
4a1b6726 WF |
299 | static unsigned long pagemap_read(uint64_t *buf, |
300 | unsigned long index, | |
301 | unsigned long pages) | |
302 | { | |
303 | return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages); | |
304 | } | |
305 | ||
306 | static unsigned long pagemap_pfn(uint64_t val) | |
307 | { | |
308 | unsigned long pfn; | |
309 | ||
310 | if (val & PM_PRESENT) | |
311 | pfn = PM_PFRAME(val); | |
312 | else | |
313 | pfn = 0; | |
314 | ||
315 | return pfn; | |
316 | } | |
317 | ||
0335ddd3 NH |
318 | static unsigned long pagemap_swap_offset(uint64_t val) |
319 | { | |
320 | return val & PM_SWAP ? PM_SWAP_OFFSET(val) : 0; | |
321 | } | |
35efa5e9 WF |
322 | |
323 | /* | |
324 | * page flag names | |
325 | */ | |
326 | ||
b7ed698c | 327 | static char *page_flag_name(uint64_t flags) |
35efa5e9 WF |
328 | { |
329 | static char buf[65]; | |
330 | int present; | |
e30d539b | 331 | size_t i, j; |
35efa5e9 WF |
332 | |
333 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
334 | present = (flags >> i) & 1; | |
335 | if (!page_flag_names[i]) { | |
336 | if (present) | |
af901ca1 | 337 | fatal("unknown flag bit %d\n", i); |
35efa5e9 WF |
338 | continue; |
339 | } | |
340 | buf[j++] = present ? page_flag_names[i][0] : '_'; | |
341 | } | |
342 | ||
343 | return buf; | |
344 | } | |
345 | ||
b7ed698c | 346 | static char *page_flag_longname(uint64_t flags) |
35efa5e9 WF |
347 | { |
348 | static char buf[1024]; | |
e30d539b | 349 | size_t i, n; |
35efa5e9 WF |
350 | |
351 | for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
352 | if (!page_flag_names[i]) | |
353 | continue; | |
354 | if ((flags >> i) & 1) | |
355 | n += snprintf(buf + n, sizeof(buf) - n, "%s,", | |
356 | page_flag_names[i] + 2); | |
357 | } | |
358 | if (n) | |
359 | n--; | |
360 | buf[n] = '\0'; | |
361 | ||
362 | return buf; | |
363 | } | |
364 | ||
365 | ||
366 | /* | |
367 | * page list and summary | |
368 | */ | |
369 | ||
65a6a410 | 370 | static void show_page_range(unsigned long voffset, unsigned long offset, |
075db150 | 371 | unsigned long size, uint64_t flags, uint64_t cgroup) |
35efa5e9 WF |
372 | { |
373 | static uint64_t flags0; | |
075db150 | 374 | static uint64_t cgroup0; |
0b4b2ad5 | 375 | static unsigned long voff; |
35efa5e9 WF |
376 | static unsigned long index; |
377 | static unsigned long count; | |
378 | ||
075db150 | 379 | if (flags == flags0 && cgroup == cgroup0 && offset == index + count && |
65a6a410 KK |
380 | size && voffset == voff + count) { |
381 | count += size; | |
35efa5e9 WF |
382 | return; |
383 | } | |
384 | ||
0b4b2ad5 WF |
385 | if (count) { |
386 | if (opt_pid) | |
387 | printf("%lx\t", voff); | |
65a6a410 KK |
388 | if (opt_file) |
389 | printf("%lu\t", voff); | |
075db150 KK |
390 | if (opt_list_cgroup) |
391 | printf("@%llu\t", (unsigned long long)cgroup0); | |
0b4b2ad5 | 392 | printf("%lx\t%lx\t%s\n", |
35efa5e9 | 393 | index, count, page_flag_name(flags0)); |
0b4b2ad5 | 394 | } |
35efa5e9 WF |
395 | |
396 | flags0 = flags; | |
075db150 | 397 | cgroup0= cgroup; |
35efa5e9 | 398 | index = offset; |
0b4b2ad5 | 399 | voff = voffset; |
65a6a410 KK |
400 | count = size; |
401 | } | |
402 | ||
403 | static void flush_page_range(void) | |
404 | { | |
075db150 | 405 | show_page_range(0, 0, 0, 0, 0); |
35efa5e9 WF |
406 | } |
407 | ||
075db150 KK |
408 | static void show_page(unsigned long voffset, unsigned long offset, |
409 | uint64_t flags, uint64_t cgroup) | |
35efa5e9 | 410 | { |
0b4b2ad5 WF |
411 | if (opt_pid) |
412 | printf("%lx\t", voffset); | |
65a6a410 KK |
413 | if (opt_file) |
414 | printf("%lu\t", voffset); | |
075db150 KK |
415 | if (opt_list_cgroup) |
416 | printf("@%llu\t", (unsigned long long)cgroup); | |
0b4b2ad5 | 417 | printf("%lx\t%s\n", offset, page_flag_name(flags)); |
35efa5e9 WF |
418 | } |
419 | ||
b7ed698c | 420 | static void show_summary(void) |
35efa5e9 | 421 | { |
e30d539b | 422 | size_t i; |
35efa5e9 WF |
423 | |
424 | printf(" flags\tpage-count MB" | |
425 | " symbolic-flags\t\t\tlong-symbolic-flags\n"); | |
426 | ||
427 | for (i = 0; i < ARRAY_SIZE(nr_pages); i++) { | |
428 | if (nr_pages[i]) | |
429 | printf("0x%016llx\t%10lu %8lu %s\t%s\n", | |
430 | (unsigned long long)page_flags[i], | |
431 | nr_pages[i], | |
432 | pages2mb(nr_pages[i]), | |
433 | page_flag_name(page_flags[i]), | |
434 | page_flag_longname(page_flags[i])); | |
435 | } | |
436 | ||
437 | printf(" total\t%10lu %8lu\n", | |
438 | total_pages, pages2mb(total_pages)); | |
439 | } | |
440 | ||
441 | ||
442 | /* | |
443 | * page flag filters | |
444 | */ | |
445 | ||
b7ed698c | 446 | static int bit_mask_ok(uint64_t flags) |
35efa5e9 WF |
447 | { |
448 | int i; | |
449 | ||
450 | for (i = 0; i < nr_bit_filters; i++) { | |
451 | if (opt_bits[i] == KPF_ALL_BITS) { | |
452 | if ((flags & opt_mask[i]) == 0) | |
453 | return 0; | |
454 | } else { | |
455 | if ((flags & opt_mask[i]) != opt_bits[i]) | |
456 | return 0; | |
457 | } | |
458 | } | |
459 | ||
460 | return 1; | |
461 | } | |
462 | ||
46c77e2b | 463 | static uint64_t expand_overloaded_flags(uint64_t flags, uint64_t pme) |
35efa5e9 WF |
464 | { |
465 | /* SLOB/SLUB overload several page flags */ | |
466 | if (flags & BIT(SLAB)) { | |
467 | if (flags & BIT(PRIVATE)) | |
468 | flags ^= BIT(PRIVATE) | BIT(SLOB_FREE); | |
469 | if (flags & BIT(ACTIVE)) | |
470 | flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN); | |
471 | if (flags & BIT(ERROR)) | |
472 | flags ^= BIT(ERROR) | BIT(SLUB_DEBUG); | |
473 | } | |
474 | ||
475 | /* PG_reclaim is overloaded as PG_readahead in the read path */ | |
476 | if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM)) | |
477 | flags ^= BIT(RECLAIM) | BIT(READAHEAD); | |
478 | ||
46c77e2b NH |
479 | if (pme & PM_SOFT_DIRTY) |
480 | flags |= BIT(SOFTDIRTY); | |
77bb499b KK |
481 | if (pme & PM_FILE) |
482 | flags |= BIT(FILE); | |
0335ddd3 NH |
483 | if (pme & PM_SWAP) |
484 | flags |= BIT(SWAP); | |
77bb499b KK |
485 | if (pme & PM_MMAP_EXCLUSIVE) |
486 | flags |= BIT(MMAP_EXCLUSIVE); | |
46c77e2b | 487 | |
35efa5e9 WF |
488 | return flags; |
489 | } | |
490 | ||
b7ed698c | 491 | static uint64_t well_known_flags(uint64_t flags) |
35efa5e9 WF |
492 | { |
493 | /* hide flags intended only for kernel hacker */ | |
494 | flags &= ~KPF_HACKERS_BITS; | |
495 | ||
496 | /* hide non-hugeTLB compound pages */ | |
497 | if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE))) | |
498 | flags &= ~BITS_COMPOUND; | |
499 | ||
500 | return flags; | |
501 | } | |
502 | ||
46c77e2b | 503 | static uint64_t kpageflags_flags(uint64_t flags, uint64_t pme) |
48640d69 | 504 | { |
46c77e2b NH |
505 | if (opt_raw) |
506 | flags = expand_overloaded_flags(flags, pme); | |
507 | else | |
48640d69 WF |
508 | flags = well_known_flags(flags); |
509 | ||
510 | return flags; | |
511 | } | |
512 | ||
a54fed9f WF |
513 | /* |
514 | * page actions | |
515 | */ | |
516 | ||
517 | static void prepare_hwpoison_fd(void) | |
518 | { | |
12da58b0 CG |
519 | char buf[MAX_PATH + 1]; |
520 | ||
f6489bc2 | 521 | hwpoison_debug_fs = debugfs__mount(); |
5a439645 BP |
522 | if (!hwpoison_debug_fs) { |
523 | perror("mount debugfs"); | |
524 | exit(EXIT_FAILURE); | |
525 | } | |
a54fed9f WF |
526 | |
527 | if (opt_hwpoison && !hwpoison_inject_fd) { | |
12da58b0 CG |
528 | snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn", |
529 | hwpoison_debug_fs); | |
a54fed9f WF |
530 | hwpoison_inject_fd = checked_open(buf, O_WRONLY); |
531 | } | |
532 | ||
533 | if (opt_unpoison && !hwpoison_forget_fd) { | |
12da58b0 CG |
534 | snprintf(buf, MAX_PATH, "%s/hwpoison/unpoison-pfn", |
535 | hwpoison_debug_fs); | |
a54fed9f WF |
536 | hwpoison_forget_fd = checked_open(buf, O_WRONLY); |
537 | } | |
538 | } | |
539 | ||
540 | static int hwpoison_page(unsigned long offset) | |
541 | { | |
542 | char buf[100]; | |
543 | int len; | |
544 | ||
545 | len = sprintf(buf, "0x%lx\n", offset); | |
546 | len = write(hwpoison_inject_fd, buf, len); | |
547 | if (len < 0) { | |
548 | perror("hwpoison inject"); | |
549 | return len; | |
550 | } | |
551 | return 0; | |
552 | } | |
553 | ||
554 | static int unpoison_page(unsigned long offset) | |
555 | { | |
556 | char buf[100]; | |
557 | int len; | |
558 | ||
559 | len = sprintf(buf, "0x%lx\n", offset); | |
560 | len = write(hwpoison_forget_fd, buf, len); | |
561 | if (len < 0) { | |
562 | perror("hwpoison forget"); | |
563 | return len; | |
564 | } | |
565 | return 0; | |
566 | } | |
567 | ||
35efa5e9 WF |
568 | /* |
569 | * page frame walker | |
570 | */ | |
571 | ||
e30d539b | 572 | static size_t hash_slot(uint64_t flags) |
35efa5e9 | 573 | { |
e30d539b UD |
574 | size_t k = HASH_KEY(flags); |
575 | size_t i; | |
35efa5e9 WF |
576 | |
577 | /* Explicitly reserve slot 0 for flags 0: the following logic | |
578 | * cannot distinguish an unoccupied slot from slot (flags==0). | |
579 | */ | |
580 | if (flags == 0) | |
581 | return 0; | |
582 | ||
583 | /* search through the remaining (HASH_SIZE-1) slots */ | |
584 | for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) { | |
585 | if (!k || k >= ARRAY_SIZE(page_flags)) | |
586 | k = 1; | |
587 | if (page_flags[k] == 0) { | |
588 | page_flags[k] = flags; | |
589 | return k; | |
590 | } | |
591 | if (page_flags[k] == flags) | |
592 | return k; | |
593 | } | |
594 | ||
595 | fatal("hash table full: bump up HASH_SHIFT?\n"); | |
596 | exit(EXIT_FAILURE); | |
597 | } | |
598 | ||
075db150 KK |
599 | static void add_page(unsigned long voffset, unsigned long offset, |
600 | uint64_t flags, uint64_t cgroup, uint64_t pme) | |
35efa5e9 | 601 | { |
46c77e2b | 602 | flags = kpageflags_flags(flags, pme); |
35efa5e9 WF |
603 | |
604 | if (!bit_mask_ok(flags)) | |
605 | return; | |
606 | ||
075db150 KK |
607 | if (opt_cgroup && cgroup != (uint64_t)opt_cgroup) |
608 | return; | |
609 | ||
a54fed9f WF |
610 | if (opt_hwpoison) |
611 | hwpoison_page(offset); | |
612 | if (opt_unpoison) | |
613 | unpoison_page(offset); | |
614 | ||
35efa5e9 | 615 | if (opt_list == 1) |
075db150 | 616 | show_page_range(voffset, offset, 1, flags, cgroup); |
35efa5e9 | 617 | else if (opt_list == 2) |
075db150 | 618 | show_page(voffset, offset, flags, cgroup); |
35efa5e9 WF |
619 | |
620 | nr_pages[hash_slot(flags)]++; | |
621 | total_pages++; | |
622 | } | |
623 | ||
4a1b6726 | 624 | #define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */ |
e577ebde WF |
625 | static void walk_pfn(unsigned long voffset, |
626 | unsigned long index, | |
46c77e2b NH |
627 | unsigned long count, |
628 | uint64_t pme) | |
35efa5e9 | 629 | { |
4a1b6726 | 630 | uint64_t buf[KPAGEFLAGS_BATCH]; |
075db150 | 631 | uint64_t cgi[KPAGEFLAGS_BATCH]; |
35efa5e9 | 632 | unsigned long batch; |
e30d539b | 633 | unsigned long pages; |
35efa5e9 WF |
634 | unsigned long i; |
635 | ||
d9b2ddf8 NH |
636 | /* |
637 | * kpagecgroup_read() reads only if kpagecgroup were opened, but | |
638 | * /proc/kpagecgroup might even not exist, so it's better to fill | |
639 | * them with zeros here. | |
640 | */ | |
641 | if (count == 1) | |
642 | cgi[0] = 0; | |
643 | else | |
644 | memset(cgi, 0, sizeof cgi); | |
075db150 | 645 | |
35efa5e9 | 646 | while (count) { |
4a1b6726 WF |
647 | batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH); |
648 | pages = kpageflags_read(buf, index, batch); | |
649 | if (pages == 0) | |
35efa5e9 | 650 | break; |
35efa5e9 | 651 | |
075db150 KK |
652 | if (kpagecgroup_read(cgi, index, pages) != pages) |
653 | fatal("kpagecgroup returned fewer pages than expected"); | |
654 | ||
4a1b6726 | 655 | for (i = 0; i < pages; i++) |
075db150 | 656 | add_page(voffset + i, index + i, buf[i], cgi[i], pme); |
35efa5e9 | 657 | |
4a1b6726 WF |
658 | index += pages; |
659 | count -= pages; | |
35efa5e9 WF |
660 | } |
661 | } | |
662 | ||
0335ddd3 NH |
663 | static void walk_swap(unsigned long voffset, uint64_t pme) |
664 | { | |
665 | uint64_t flags = kpageflags_flags(0, pme); | |
666 | ||
667 | if (!bit_mask_ok(flags)) | |
668 | return; | |
669 | ||
075db150 KK |
670 | if (opt_cgroup) |
671 | return; | |
672 | ||
0335ddd3 | 673 | if (opt_list == 1) |
075db150 | 674 | show_page_range(voffset, pagemap_swap_offset(pme), 1, flags, 0); |
0335ddd3 | 675 | else if (opt_list == 2) |
075db150 | 676 | show_page(voffset, pagemap_swap_offset(pme), flags, 0); |
0335ddd3 NH |
677 | |
678 | nr_pages[hash_slot(flags)]++; | |
679 | total_pages++; | |
680 | } | |
681 | ||
4a1b6726 WF |
682 | #define PAGEMAP_BATCH (64 << 10) |
683 | static void walk_vma(unsigned long index, unsigned long count) | |
0b4b2ad5 | 684 | { |
4a1b6726 WF |
685 | uint64_t buf[PAGEMAP_BATCH]; |
686 | unsigned long batch; | |
687 | unsigned long pages; | |
688 | unsigned long pfn; | |
689 | unsigned long i; | |
0b4b2ad5 | 690 | |
4a1b6726 WF |
691 | while (count) { |
692 | batch = min_t(unsigned long, count, PAGEMAP_BATCH); | |
693 | pages = pagemap_read(buf, index, batch); | |
694 | if (pages == 0) | |
695 | break; | |
0b4b2ad5 | 696 | |
4a1b6726 WF |
697 | for (i = 0; i < pages; i++) { |
698 | pfn = pagemap_pfn(buf[i]); | |
4a1b6726 | 699 | if (pfn) |
46c77e2b | 700 | walk_pfn(index + i, pfn, 1, buf[i]); |
0335ddd3 NH |
701 | if (buf[i] & PM_SWAP) |
702 | walk_swap(index + i, buf[i]); | |
4a1b6726 WF |
703 | } |
704 | ||
705 | index += pages; | |
706 | count -= pages; | |
707 | } | |
0b4b2ad5 WF |
708 | } |
709 | ||
710 | static void walk_task(unsigned long index, unsigned long count) | |
711 | { | |
0b4b2ad5 | 712 | const unsigned long end = index + count; |
e577ebde WF |
713 | unsigned long start; |
714 | int i = 0; | |
0b4b2ad5 WF |
715 | |
716 | while (index < end) { | |
717 | ||
718 | while (pg_end[i] <= index) | |
719 | if (++i >= nr_vmas) | |
720 | return; | |
721 | if (pg_start[i] >= end) | |
722 | return; | |
723 | ||
e577ebde WF |
724 | start = max_t(unsigned long, pg_start[i], index); |
725 | index = min_t(unsigned long, pg_end[i], end); | |
0b4b2ad5 | 726 | |
e577ebde WF |
727 | assert(start < index); |
728 | walk_vma(start, index - start); | |
0b4b2ad5 WF |
729 | } |
730 | } | |
731 | ||
732 | static void add_addr_range(unsigned long offset, unsigned long size) | |
733 | { | |
734 | if (nr_addr_ranges >= MAX_ADDR_RANGES) | |
735 | fatal("too many addr ranges\n"); | |
736 | ||
737 | opt_offset[nr_addr_ranges] = offset; | |
738 | opt_size[nr_addr_ranges] = min_t(unsigned long, size, ULONG_MAX-offset); | |
739 | nr_addr_ranges++; | |
740 | } | |
741 | ||
b7ed698c | 742 | static void walk_addr_ranges(void) |
35efa5e9 WF |
743 | { |
744 | int i; | |
745 | ||
31bbf66e | 746 | kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); |
35efa5e9 WF |
747 | |
748 | if (!nr_addr_ranges) | |
0b4b2ad5 | 749 | add_addr_range(0, ULONG_MAX); |
35efa5e9 WF |
750 | |
751 | for (i = 0; i < nr_addr_ranges; i++) | |
0b4b2ad5 | 752 | if (!opt_pid) |
65a6a410 | 753 | walk_pfn(opt_offset[i], opt_offset[i], opt_size[i], 0); |
0b4b2ad5 WF |
754 | else |
755 | walk_task(opt_offset[i], opt_size[i]); | |
35efa5e9 WF |
756 | |
757 | close(kpageflags_fd); | |
758 | } | |
759 | ||
760 | ||
761 | /* | |
762 | * user interface | |
763 | */ | |
764 | ||
b7ed698c | 765 | static const char *page_flag_type(uint64_t flag) |
35efa5e9 WF |
766 | { |
767 | if (flag & KPF_HACKERS_BITS) | |
768 | return "(r)"; | |
769 | if (flag & KPF_OVERLOADED_BITS) | |
770 | return "(o)"; | |
771 | return " "; | |
772 | } | |
773 | ||
b7ed698c | 774 | static void usage(void) |
35efa5e9 | 775 | { |
e30d539b | 776 | size_t i, j; |
35efa5e9 WF |
777 | |
778 | printf( | |
779 | "page-types [options]\n" | |
9fdcd886 | 780 | " -r|--raw Raw mode, for kernel developers\n" |
dcfe730c | 781 | " -d|--describe flags Describe flags\n" |
9fdcd886 AC |
782 | " -a|--addr addr-spec Walk a range of pages\n" |
783 | " -b|--bits bits-spec Walk pages with specified bits\n" | |
075db150 | 784 | " -c|--cgroup path|@inode Walk pages within memory cgroup\n" |
9fdcd886 | 785 | " -p|--pid pid Walk process address space\n" |
9fdcd886 | 786 | " -f|--file filename Walk file address space\n" |
9fdcd886 AC |
787 | " -l|--list Show page details in ranges\n" |
788 | " -L|--list-each Show page details one by one\n" | |
075db150 | 789 | " -C|--list-cgroup Show cgroup inode for pages\n" |
c7825cfa | 790 | " -N|--no-summary Don't show summary info\n" |
9fdcd886 AC |
791 | " -X|--hwpoison hwpoison pages\n" |
792 | " -x|--unpoison unpoison pages\n" | |
793 | " -h|--help Show this usage message\n" | |
dcfe730c | 794 | "flags:\n" |
9fdcd886 AC |
795 | " 0x10 bitfield format, e.g.\n" |
796 | " anon bit-name, e.g.\n" | |
797 | " 0x10,anon comma-separated list, e.g.\n" | |
35efa5e9 | 798 | "addr-spec:\n" |
9fdcd886 AC |
799 | " N one page at offset N (unit: pages)\n" |
800 | " N+M pages range from N to N+M-1\n" | |
801 | " N,M pages range from N to M-1\n" | |
802 | " N, pages range from N to end\n" | |
803 | " ,M pages range from 0 to M-1\n" | |
35efa5e9 | 804 | "bits-spec:\n" |
9fdcd886 AC |
805 | " bit1,bit2 (flags & (bit1|bit2)) != 0\n" |
806 | " bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n" | |
807 | " bit1,~bit2 (flags & (bit1|bit2)) == bit1\n" | |
808 | " =bit1,bit2 flags == (bit1|bit2)\n" | |
35efa5e9 WF |
809 | "bit-names:\n" |
810 | ); | |
811 | ||
812 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
813 | if (!page_flag_names[i]) | |
814 | continue; | |
815 | printf("%16s%s", page_flag_names[i] + 2, | |
816 | page_flag_type(1ULL << i)); | |
817 | if (++j > 3) { | |
818 | j = 0; | |
819 | putchar('\n'); | |
820 | } | |
821 | } | |
822 | printf("\n " | |
823 | "(r) raw mode bits (o) overloaded bits\n"); | |
824 | } | |
825 | ||
b7ed698c | 826 | static unsigned long long parse_number(const char *str) |
35efa5e9 WF |
827 | { |
828 | unsigned long long n; | |
829 | ||
830 | n = strtoll(str, NULL, 0); | |
831 | ||
832 | if (n == 0 && str[0] != '0') | |
833 | fatal("invalid name or number: %s\n", str); | |
834 | ||
835 | return n; | |
836 | } | |
837 | ||
b7ed698c | 838 | static void parse_pid(const char *str) |
35efa5e9 | 839 | { |
0b4b2ad5 WF |
840 | FILE *file; |
841 | char buf[5000]; | |
842 | ||
35efa5e9 | 843 | opt_pid = parse_number(str); |
35efa5e9 | 844 | |
0b4b2ad5 | 845 | sprintf(buf, "/proc/%d/pagemap", opt_pid); |
31bbf66e | 846 | pagemap_fd = checked_open(buf, O_RDONLY); |
0b4b2ad5 WF |
847 | |
848 | sprintf(buf, "/proc/%d/maps", opt_pid); | |
849 | file = fopen(buf, "r"); | |
850 | if (!file) { | |
851 | perror(buf); | |
852 | exit(EXIT_FAILURE); | |
853 | } | |
854 | ||
855 | while (fgets(buf, sizeof(buf), file) != NULL) { | |
856 | unsigned long vm_start; | |
857 | unsigned long vm_end; | |
858 | unsigned long long pgoff; | |
859 | int major, minor; | |
860 | char r, w, x, s; | |
861 | unsigned long ino; | |
862 | int n; | |
863 | ||
864 | n = sscanf(buf, "%lx-%lx %c%c%c%c %llx %x:%x %lu", | |
865 | &vm_start, | |
866 | &vm_end, | |
867 | &r, &w, &x, &s, | |
868 | &pgoff, | |
869 | &major, &minor, | |
870 | &ino); | |
871 | if (n < 10) { | |
872 | fprintf(stderr, "unexpected line: %s\n", buf); | |
873 | continue; | |
874 | } | |
875 | pg_start[nr_vmas] = vm_start / page_size; | |
876 | pg_end[nr_vmas] = vm_end / page_size; | |
877 | if (++nr_vmas >= MAX_VMAS) { | |
878 | fprintf(stderr, "too many VMAs\n"); | |
879 | break; | |
880 | } | |
881 | } | |
882 | fclose(file); | |
35efa5e9 WF |
883 | } |
884 | ||
65a6a410 KK |
885 | static void show_file(const char *name, const struct stat *st) |
886 | { | |
887 | unsigned long long size = st->st_size; | |
888 | char atime[64], mtime[64]; | |
889 | long now = time(NULL); | |
890 | ||
891 | printf("%s\tInode: %u\tSize: %llu (%llu pages)\n", | |
892 | name, (unsigned)st->st_ino, | |
893 | size, (size + page_size - 1) / page_size); | |
894 | ||
895 | strftime(atime, sizeof(atime), "%c", localtime(&st->st_atime)); | |
896 | strftime(mtime, sizeof(mtime), "%c", localtime(&st->st_mtime)); | |
897 | ||
898 | printf("Modify: %s (%ld seconds ago)\nAccess: %s (%ld seconds ago)\n", | |
899 | mtime, now - st->st_mtime, | |
900 | atime, now - st->st_atime); | |
901 | } | |
902 | ||
1d46598b KK |
903 | static sigjmp_buf sigbus_jmp; |
904 | ||
905 | static void * volatile sigbus_addr; | |
906 | ||
907 | static void sigbus_handler(int sig, siginfo_t *info, void *ucontex) | |
908 | { | |
909 | (void)sig; | |
910 | (void)ucontex; | |
911 | sigbus_addr = info ? info->si_addr : NULL; | |
912 | siglongjmp(sigbus_jmp, 1); | |
913 | } | |
914 | ||
915 | static struct sigaction sigbus_action = { | |
916 | .sa_sigaction = sigbus_handler, | |
917 | .sa_flags = SA_SIGINFO, | |
918 | }; | |
919 | ||
65a6a410 KK |
920 | static void walk_file(const char *name, const struct stat *st) |
921 | { | |
922 | uint8_t vec[PAGEMAP_BATCH]; | |
923 | uint64_t buf[PAGEMAP_BATCH], flags; | |
075db150 | 924 | uint64_t cgroup = 0; |
65a6a410 | 925 | unsigned long nr_pages, pfn, i; |
1d46598b | 926 | off_t off, end = st->st_size; |
65a6a410 | 927 | int fd; |
65a6a410 KK |
928 | ssize_t len; |
929 | void *ptr; | |
930 | int first = 1; | |
931 | ||
932 | fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW); | |
933 | ||
1d46598b KK |
934 | for (off = 0; off < end; off += len) { |
935 | nr_pages = (end - off + page_size - 1) / page_size; | |
65a6a410 KK |
936 | if (nr_pages > PAGEMAP_BATCH) |
937 | nr_pages = PAGEMAP_BATCH; | |
938 | len = nr_pages * page_size; | |
939 | ||
940 | ptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, off); | |
941 | if (ptr == MAP_FAILED) | |
942 | fatal("mmap failed: %s", name); | |
943 | ||
944 | /* determine cached pages */ | |
945 | if (mincore(ptr, len, vec)) | |
946 | fatal("mincore failed: %s", name); | |
947 | ||
948 | /* turn off readahead */ | |
949 | if (madvise(ptr, len, MADV_RANDOM)) | |
950 | fatal("madvice failed: %s", name); | |
951 | ||
1d46598b KK |
952 | if (sigsetjmp(sigbus_jmp, 1)) { |
953 | end = off + sigbus_addr ? sigbus_addr - ptr : 0; | |
954 | fprintf(stderr, "got sigbus at offset %lld: %s\n", | |
955 | (long long)end, name); | |
956 | goto got_sigbus; | |
957 | } | |
958 | ||
65a6a410 KK |
959 | /* populate ptes */ |
960 | for (i = 0; i < nr_pages ; i++) { | |
961 | if (vec[i] & 1) | |
962 | (void)*(volatile int *)(ptr + i * page_size); | |
963 | } | |
1d46598b | 964 | got_sigbus: |
65a6a410 KK |
965 | |
966 | /* turn off harvesting reference bits */ | |
967 | if (madvise(ptr, len, MADV_SEQUENTIAL)) | |
968 | fatal("madvice failed: %s", name); | |
969 | ||
970 | if (pagemap_read(buf, (unsigned long)ptr / page_size, | |
971 | nr_pages) != nr_pages) | |
972 | fatal("cannot read pagemap"); | |
973 | ||
974 | munmap(ptr, len); | |
975 | ||
976 | for (i = 0; i < nr_pages; i++) { | |
977 | pfn = pagemap_pfn(buf[i]); | |
978 | if (!pfn) | |
979 | continue; | |
980 | if (!kpageflags_read(&flags, pfn, 1)) | |
981 | continue; | |
075db150 KK |
982 | if (!kpagecgroup_read(&cgroup, pfn, 1)) |
983 | fatal("kpagecgroup_read failed"); | |
65a6a410 KK |
984 | if (first && opt_list) { |
985 | first = 0; | |
986 | flush_page_range(); | |
987 | show_file(name, st); | |
988 | } | |
075db150 KK |
989 | add_page(off / page_size + i, pfn, |
990 | flags, cgroup, buf[i]); | |
65a6a410 KK |
991 | } |
992 | } | |
993 | ||
994 | close(fd); | |
995 | } | |
996 | ||
997 | int walk_tree(const char *name, const struct stat *st, int type, struct FTW *f) | |
998 | { | |
999 | (void)f; | |
1000 | switch (type) { | |
1001 | case FTW_F: | |
1002 | if (S_ISREG(st->st_mode)) | |
1003 | walk_file(name, st); | |
1004 | break; | |
1005 | case FTW_DNR: | |
1006 | fprintf(stderr, "cannot read dir: %s\n", name); | |
1007 | break; | |
1008 | } | |
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | static void walk_page_cache(void) | |
1013 | { | |
1014 | struct stat st; | |
1015 | ||
1016 | kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); | |
1017 | pagemap_fd = checked_open("/proc/self/pagemap", O_RDONLY); | |
1d46598b | 1018 | sigaction(SIGBUS, &sigbus_action, NULL); |
65a6a410 KK |
1019 | |
1020 | if (stat(opt_file, &st)) | |
1021 | fatal("stat failed: %s\n", opt_file); | |
1022 | ||
1023 | if (S_ISREG(st.st_mode)) { | |
1024 | walk_file(opt_file, &st); | |
1025 | } else if (S_ISDIR(st.st_mode)) { | |
1026 | /* do not follow symlinks and mountpoints */ | |
1027 | if (nftw(opt_file, walk_tree, 64, FTW_MOUNT | FTW_PHYS) < 0) | |
1028 | fatal("nftw failed: %s\n", opt_file); | |
1029 | } else | |
1030 | fatal("unhandled file type: %s\n", opt_file); | |
1031 | ||
1032 | close(kpageflags_fd); | |
1033 | close(pagemap_fd); | |
1d46598b | 1034 | signal(SIGBUS, SIG_DFL); |
65a6a410 KK |
1035 | } |
1036 | ||
0b4b2ad5 | 1037 | static void parse_file(const char *name) |
35efa5e9 | 1038 | { |
65a6a410 | 1039 | opt_file = name; |
35efa5e9 WF |
1040 | } |
1041 | ||
075db150 KK |
1042 | static void parse_cgroup(const char *path) |
1043 | { | |
1044 | if (path[0] == '@') { | |
1045 | opt_cgroup = parse_number(path + 1); | |
1046 | return; | |
1047 | } | |
1048 | ||
1049 | struct stat st; | |
1050 | ||
1051 | if (stat(path, &st)) | |
1052 | fatal("stat failed: %s: %m\n", path); | |
1053 | ||
1054 | if (!S_ISDIR(st.st_mode)) | |
1055 | fatal("cgroup supposed to be a directory: %s\n", path); | |
1056 | ||
1057 | opt_cgroup = st.st_ino; | |
1058 | } | |
1059 | ||
b7ed698c | 1060 | static void parse_addr_range(const char *optarg) |
35efa5e9 WF |
1061 | { |
1062 | unsigned long offset; | |
1063 | unsigned long size; | |
1064 | char *p; | |
1065 | ||
1066 | p = strchr(optarg, ','); | |
1067 | if (!p) | |
1068 | p = strchr(optarg, '+'); | |
1069 | ||
1070 | if (p == optarg) { | |
1071 | offset = 0; | |
1072 | size = parse_number(p + 1); | |
1073 | } else if (p) { | |
1074 | offset = parse_number(optarg); | |
1075 | if (p[1] == '\0') | |
1076 | size = ULONG_MAX; | |
1077 | else { | |
1078 | size = parse_number(p + 1); | |
1079 | if (*p == ',') { | |
1080 | if (size < offset) | |
1081 | fatal("invalid range: %lu,%lu\n", | |
1082 | offset, size); | |
1083 | size -= offset; | |
1084 | } | |
1085 | } | |
1086 | } else { | |
1087 | offset = parse_number(optarg); | |
1088 | size = 1; | |
1089 | } | |
1090 | ||
1091 | add_addr_range(offset, size); | |
1092 | } | |
1093 | ||
b7ed698c | 1094 | static void add_bits_filter(uint64_t mask, uint64_t bits) |
35efa5e9 WF |
1095 | { |
1096 | if (nr_bit_filters >= MAX_BIT_FILTERS) | |
1097 | fatal("too much bit filters\n"); | |
1098 | ||
1099 | opt_mask[nr_bit_filters] = mask; | |
1100 | opt_bits[nr_bit_filters] = bits; | |
1101 | nr_bit_filters++; | |
1102 | } | |
1103 | ||
b7ed698c | 1104 | static uint64_t parse_flag_name(const char *str, int len) |
35efa5e9 | 1105 | { |
e30d539b | 1106 | size_t i; |
35efa5e9 WF |
1107 | |
1108 | if (!*str || !len) | |
1109 | return 0; | |
1110 | ||
1111 | if (len <= 8 && !strncmp(str, "compound", len)) | |
1112 | return BITS_COMPOUND; | |
1113 | ||
1114 | for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
1115 | if (!page_flag_names[i]) | |
1116 | continue; | |
1117 | if (!strncmp(str, page_flag_names[i] + 2, len)) | |
1118 | return 1ULL << i; | |
1119 | } | |
1120 | ||
1121 | return parse_number(str); | |
1122 | } | |
1123 | ||
b7ed698c | 1124 | static uint64_t parse_flag_names(const char *str, int all) |
35efa5e9 WF |
1125 | { |
1126 | const char *p = str; | |
1127 | uint64_t flags = 0; | |
1128 | ||
1129 | while (1) { | |
1130 | if (*p == ',' || *p == '=' || *p == '\0') { | |
1131 | if ((*str != '~') || (*str == '~' && all && *++str)) | |
1132 | flags |= parse_flag_name(str, p - str); | |
1133 | if (*p != ',') | |
1134 | break; | |
1135 | str = p + 1; | |
1136 | } | |
1137 | p++; | |
1138 | } | |
1139 | ||
1140 | return flags; | |
1141 | } | |
1142 | ||
b7ed698c | 1143 | static void parse_bits_mask(const char *optarg) |
35efa5e9 WF |
1144 | { |
1145 | uint64_t mask; | |
1146 | uint64_t bits; | |
1147 | const char *p; | |
1148 | ||
1149 | p = strchr(optarg, '='); | |
1150 | if (p == optarg) { | |
1151 | mask = KPF_ALL_BITS; | |
1152 | bits = parse_flag_names(p + 1, 0); | |
1153 | } else if (p) { | |
1154 | mask = parse_flag_names(optarg, 0); | |
1155 | bits = parse_flag_names(p + 1, 0); | |
1156 | } else if (strchr(optarg, '~')) { | |
1157 | mask = parse_flag_names(optarg, 1); | |
1158 | bits = parse_flag_names(optarg, 0); | |
1159 | } else { | |
1160 | mask = parse_flag_names(optarg, 0); | |
1161 | bits = KPF_ALL_BITS; | |
1162 | } | |
1163 | ||
1164 | add_bits_filter(mask, bits); | |
1165 | } | |
1166 | ||
dcfe730c AC |
1167 | static void describe_flags(const char *optarg) |
1168 | { | |
1169 | uint64_t flags = parse_flag_names(optarg, 0); | |
1170 | ||
1171 | printf("0x%016llx\t%s\t%s\n", | |
1172 | (unsigned long long)flags, | |
1173 | page_flag_name(flags), | |
1174 | page_flag_longname(flags)); | |
1175 | } | |
35efa5e9 | 1176 | |
3428838d | 1177 | static const struct option opts[] = { |
35efa5e9 WF |
1178 | { "raw" , 0, NULL, 'r' }, |
1179 | { "pid" , 1, NULL, 'p' }, | |
1180 | { "file" , 1, NULL, 'f' }, | |
1181 | { "addr" , 1, NULL, 'a' }, | |
1182 | { "bits" , 1, NULL, 'b' }, | |
075db150 | 1183 | { "cgroup" , 1, NULL, 'c' }, |
dcfe730c | 1184 | { "describe" , 1, NULL, 'd' }, |
35efa5e9 WF |
1185 | { "list" , 0, NULL, 'l' }, |
1186 | { "list-each" , 0, NULL, 'L' }, | |
075db150 | 1187 | { "list-cgroup", 0, NULL, 'C' }, |
35efa5e9 | 1188 | { "no-summary", 0, NULL, 'N' }, |
a54fed9f WF |
1189 | { "hwpoison" , 0, NULL, 'X' }, |
1190 | { "unpoison" , 0, NULL, 'x' }, | |
35efa5e9 WF |
1191 | { "help" , 0, NULL, 'h' }, |
1192 | { NULL , 0, NULL, 0 } | |
1193 | }; | |
1194 | ||
1195 | int main(int argc, char *argv[]) | |
1196 | { | |
1197 | int c; | |
1198 | ||
1199 | page_size = getpagesize(); | |
1200 | ||
1201 | while ((c = getopt_long(argc, argv, | |
075db150 | 1202 | "rp:f:a:b:d:c:ClLNXxh", opts, NULL)) != -1) { |
35efa5e9 WF |
1203 | switch (c) { |
1204 | case 'r': | |
1205 | opt_raw = 1; | |
1206 | break; | |
1207 | case 'p': | |
1208 | parse_pid(optarg); | |
1209 | break; | |
1210 | case 'f': | |
1211 | parse_file(optarg); | |
1212 | break; | |
1213 | case 'a': | |
1214 | parse_addr_range(optarg); | |
1215 | break; | |
1216 | case 'b': | |
1217 | parse_bits_mask(optarg); | |
1218 | break; | |
075db150 KK |
1219 | case 'c': |
1220 | parse_cgroup(optarg); | |
1221 | break; | |
1222 | case 'C': | |
1223 | opt_list_cgroup = 1; | |
1224 | break; | |
dcfe730c | 1225 | case 'd': |
dcfe730c | 1226 | describe_flags(optarg); |
bb86a733 | 1227 | exit(0); |
35efa5e9 WF |
1228 | case 'l': |
1229 | opt_list = 1; | |
1230 | break; | |
1231 | case 'L': | |
1232 | opt_list = 2; | |
1233 | break; | |
1234 | case 'N': | |
1235 | opt_no_summary = 1; | |
1236 | break; | |
a54fed9f WF |
1237 | case 'X': |
1238 | opt_hwpoison = 1; | |
1239 | prepare_hwpoison_fd(); | |
1240 | break; | |
1241 | case 'x': | |
1242 | opt_unpoison = 1; | |
1243 | prepare_hwpoison_fd(); | |
1244 | break; | |
35efa5e9 WF |
1245 | case 'h': |
1246 | usage(); | |
1247 | exit(0); | |
1248 | default: | |
1249 | usage(); | |
1250 | exit(1); | |
1251 | } | |
1252 | } | |
1253 | ||
075db150 KK |
1254 | if (opt_cgroup || opt_list_cgroup) |
1255 | kpagecgroup_fd = checked_open(PROC_KPAGECGROUP, O_RDONLY); | |
1256 | ||
0b4b2ad5 WF |
1257 | if (opt_list && opt_pid) |
1258 | printf("voffset\t"); | |
65a6a410 KK |
1259 | if (opt_list && opt_file) |
1260 | printf("foffset\t"); | |
075db150 KK |
1261 | if (opt_list && opt_list_cgroup) |
1262 | printf("cgroup\t"); | |
35efa5e9 | 1263 | if (opt_list == 1) |
0b4b2ad5 | 1264 | printf("offset\tlen\tflags\n"); |
35efa5e9 WF |
1265 | if (opt_list == 2) |
1266 | printf("offset\tflags\n"); | |
1267 | ||
65a6a410 KK |
1268 | if (opt_file) |
1269 | walk_page_cache(); | |
1270 | else | |
1271 | walk_addr_ranges(); | |
35efa5e9 WF |
1272 | |
1273 | if (opt_list == 1) | |
65a6a410 | 1274 | flush_page_range(); |
35efa5e9 WF |
1275 | |
1276 | if (opt_no_summary) | |
1277 | return 0; | |
1278 | ||
1279 | if (opt_list) | |
1280 | printf("\n\n"); | |
1281 | ||
1282 | show_summary(); | |
1283 | ||
1284 | return 0; | |
1285 | } |