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af7c5f89 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
35efa5e9 WF |
2 | /* |
3 | * page-types: Tool for querying page flags | |
4 | * | |
5 | * Copyright (C) 2009 Intel corporation | |
0c57effe WF |
6 | * |
7 | * Authors: Wu Fengguang <fengguang.wu@intel.com> | |
35efa5e9 WF |
8 | */ |
9 | ||
65a6a410 KK |
10 | #define _FILE_OFFSET_BITS 64 |
11 | #define _GNU_SOURCE | |
35efa5e9 WF |
12 | #include <stdio.h> |
13 | #include <stdlib.h> | |
14 | #include <unistd.h> | |
15 | #include <stdint.h> | |
16 | #include <stdarg.h> | |
17 | #include <string.h> | |
18 | #include <getopt.h> | |
19 | #include <limits.h> | |
0b4b2ad5 | 20 | #include <assert.h> |
65a6a410 KK |
21 | #include <ftw.h> |
22 | #include <time.h> | |
1d46598b KK |
23 | #include <setjmp.h> |
24 | #include <signal.h> | |
35efa5e9 WF |
25 | #include <sys/types.h> |
26 | #include <sys/errno.h> | |
27 | #include <sys/fcntl.h> | |
12da58b0 CG |
28 | #include <sys/mount.h> |
29 | #include <sys/statfs.h> | |
65a6a410 | 30 | #include <sys/mman.h> |
607ca46e | 31 | #include "../../include/uapi/linux/magic.h" |
59ce8764 | 32 | #include "../../include/uapi/linux/kernel-page-flags.h" |
f6489bc2 | 33 | #include <api/fs/fs.h> |
35efa5e9 | 34 | |
12da58b0 CG |
35 | #ifndef MAX_PATH |
36 | # define MAX_PATH 256 | |
37 | #endif | |
38 | ||
39 | #ifndef STR | |
40 | # define _STR(x) #x | |
41 | # define STR(x) _STR(x) | |
42 | #endif | |
43 | ||
0b4b2ad5 WF |
44 | /* |
45 | * pagemap kernel ABI bits | |
46 | */ | |
47 | ||
deb94544 KK |
48 | #define PM_ENTRY_BYTES 8 |
49 | #define PM_PFRAME_BITS 55 | |
50 | #define PM_PFRAME_MASK ((1LL << PM_PFRAME_BITS) - 1) | |
51 | #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK) | |
0335ddd3 NH |
52 | #define MAX_SWAPFILES_SHIFT 5 |
53 | #define PM_SWAP_OFFSET(x) (((x) & PM_PFRAME_MASK) >> MAX_SWAPFILES_SHIFT) | |
deb94544 | 54 | #define PM_SOFT_DIRTY (1ULL << 55) |
77bb499b | 55 | #define PM_MMAP_EXCLUSIVE (1ULL << 56) |
deb94544 KK |
56 | #define PM_FILE (1ULL << 61) |
57 | #define PM_SWAP (1ULL << 62) | |
58 | #define PM_PRESENT (1ULL << 63) | |
0b4b2ad5 | 59 | |
35efa5e9 WF |
60 | /* |
61 | * kernel page flags | |
62 | */ | |
63 | ||
64 | #define KPF_BYTES 8 | |
65 | #define PROC_KPAGEFLAGS "/proc/kpageflags" | |
7f1d23e6 | 66 | #define PROC_KPAGECOUNT "/proc/kpagecount" |
075db150 | 67 | #define PROC_KPAGECGROUP "/proc/kpagecgroup" |
35efa5e9 | 68 | |
59ae96ff CH |
69 | #define SYS_KERNEL_MM_PAGE_IDLE "/sys/kernel/mm/page_idle/bitmap" |
70 | ||
35efa5e9 WF |
71 | /* [32-] kernel hacking assistances */ |
72 | #define KPF_RESERVED 32 | |
73 | #define KPF_MLOCKED 33 | |
74 | #define KPF_MAPPEDTODISK 34 | |
75 | #define KPF_PRIVATE 35 | |
76 | #define KPF_PRIVATE_2 36 | |
77 | #define KPF_OWNER_PRIVATE 37 | |
78 | #define KPF_ARCH 38 | |
79 | #define KPF_UNCACHED 39 | |
46c77e2b | 80 | #define KPF_SOFTDIRTY 40 |
4beba948 | 81 | #define KPF_ARCH_2 41 |
35efa5e9 WF |
82 | |
83 | /* [48-] take some arbitrary free slots for expanding overloaded flags | |
84 | * not part of kernel API | |
85 | */ | |
86 | #define KPF_READAHEAD 48 | |
87 | #define KPF_SLOB_FREE 49 | |
88 | #define KPF_SLUB_FROZEN 50 | |
89 | #define KPF_SLUB_DEBUG 51 | |
0335ddd3 NH |
90 | #define KPF_FILE 61 |
91 | #define KPF_SWAP 62 | |
77bb499b | 92 | #define KPF_MMAP_EXCLUSIVE 63 |
35efa5e9 WF |
93 | |
94 | #define KPF_ALL_BITS ((uint64_t)~0ULL) | |
95 | #define KPF_HACKERS_BITS (0xffffULL << 32) | |
96 | #define KPF_OVERLOADED_BITS (0xffffULL << 48) | |
97 | #define BIT(name) (1ULL << KPF_##name) | |
98 | #define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL)) | |
99 | ||
c6dd897f | 100 | static const char * const page_flag_names[] = { |
35efa5e9 WF |
101 | [KPF_LOCKED] = "L:locked", |
102 | [KPF_ERROR] = "E:error", | |
103 | [KPF_REFERENCED] = "R:referenced", | |
104 | [KPF_UPTODATE] = "U:uptodate", | |
105 | [KPF_DIRTY] = "D:dirty", | |
106 | [KPF_LRU] = "l:lru", | |
107 | [KPF_ACTIVE] = "A:active", | |
108 | [KPF_SLAB] = "S:slab", | |
109 | [KPF_WRITEBACK] = "W:writeback", | |
110 | [KPF_RECLAIM] = "I:reclaim", | |
111 | [KPF_BUDDY] = "B:buddy", | |
112 | ||
113 | [KPF_MMAP] = "M:mmap", | |
114 | [KPF_ANON] = "a:anonymous", | |
115 | [KPF_SWAPCACHE] = "s:swapcache", | |
116 | [KPF_SWAPBACKED] = "b:swapbacked", | |
117 | [KPF_COMPOUND_HEAD] = "H:compound_head", | |
118 | [KPF_COMPOUND_TAIL] = "T:compound_tail", | |
119 | [KPF_HUGE] = "G:huge", | |
120 | [KPF_UNEVICTABLE] = "u:unevictable", | |
253fb02d | 121 | [KPF_HWPOISON] = "X:hwpoison", |
35efa5e9 | 122 | [KPF_NOPAGE] = "n:nopage", |
a1bbb5ec | 123 | [KPF_KSM] = "x:ksm", |
807f0ccf | 124 | [KPF_THP] = "t:thp", |
ca215086 | 125 | [KPF_OFFLINE] = "o:offline", |
1d40a5ea | 126 | [KPF_PGTABLE] = "g:pgtable", |
56873f43 | 127 | [KPF_ZERO_PAGE] = "z:zero_page", |
429d4862 | 128 | [KPF_IDLE] = "i:idle_page", |
35efa5e9 WF |
129 | |
130 | [KPF_RESERVED] = "r:reserved", | |
131 | [KPF_MLOCKED] = "m:mlocked", | |
132 | [KPF_MAPPEDTODISK] = "d:mappedtodisk", | |
133 | [KPF_PRIVATE] = "P:private", | |
134 | [KPF_PRIVATE_2] = "p:private_2", | |
135 | [KPF_OWNER_PRIVATE] = "O:owner_private", | |
136 | [KPF_ARCH] = "h:arch", | |
137 | [KPF_UNCACHED] = "c:uncached", | |
46c77e2b | 138 | [KPF_SOFTDIRTY] = "f:softdirty", |
4beba948 | 139 | [KPF_ARCH_2] = "H:arch_2", |
35efa5e9 WF |
140 | |
141 | [KPF_READAHEAD] = "I:readahead", | |
142 | [KPF_SLOB_FREE] = "P:slob_free", | |
143 | [KPF_SLUB_FROZEN] = "A:slub_frozen", | |
144 | [KPF_SLUB_DEBUG] = "E:slub_debug", | |
77bb499b KK |
145 | |
146 | [KPF_FILE] = "F:file", | |
0335ddd3 | 147 | [KPF_SWAP] = "w:swap", |
77bb499b | 148 | [KPF_MMAP_EXCLUSIVE] = "1:mmap_exclusive", |
35efa5e9 WF |
149 | }; |
150 | ||
151 | ||
152 | /* | |
153 | * data structures | |
154 | */ | |
155 | ||
156 | static int opt_raw; /* for kernel developers */ | |
157 | static int opt_list; /* list pages (in ranges) */ | |
59ae96ff | 158 | static int opt_mark_idle; /* set accessed bit */ |
35efa5e9 WF |
159 | static int opt_no_summary; /* don't show summary */ |
160 | static pid_t opt_pid; /* process to walk */ | |
c7905f20 | 161 | const char *opt_file; /* file or directory path */ |
075db150 KK |
162 | static uint64_t opt_cgroup; /* cgroup inode */ |
163 | static int opt_list_cgroup;/* list page cgroup */ | |
7f1d23e6 | 164 | static int opt_list_mapcnt;/* list page map count */ |
c7905f20 | 165 | static const char *opt_kpageflags;/* kpageflags file to parse */ |
35efa5e9 WF |
166 | |
167 | #define MAX_ADDR_RANGES 1024 | |
168 | static int nr_addr_ranges; | |
169 | static unsigned long opt_offset[MAX_ADDR_RANGES]; | |
170 | static unsigned long opt_size[MAX_ADDR_RANGES]; | |
171 | ||
0b4b2ad5 WF |
172 | #define MAX_VMAS 10240 |
173 | static int nr_vmas; | |
174 | static unsigned long pg_start[MAX_VMAS]; | |
175 | static unsigned long pg_end[MAX_VMAS]; | |
0b4b2ad5 | 176 | |
35efa5e9 WF |
177 | #define MAX_BIT_FILTERS 64 |
178 | static int nr_bit_filters; | |
179 | static uint64_t opt_mask[MAX_BIT_FILTERS]; | |
180 | static uint64_t opt_bits[MAX_BIT_FILTERS]; | |
181 | ||
182 | static int page_size; | |
183 | ||
4a1b6726 | 184 | static int pagemap_fd; |
35efa5e9 | 185 | static int kpageflags_fd; |
7f1d23e6 | 186 | static int kpagecount_fd = -1; |
075db150 | 187 | static int kpagecgroup_fd = -1; |
59ae96ff | 188 | static int page_idle_fd = -1; |
35efa5e9 | 189 | |
a54fed9f WF |
190 | static int opt_hwpoison; |
191 | static int opt_unpoison; | |
192 | ||
f6489bc2 | 193 | static const char *hwpoison_debug_fs; |
a54fed9f WF |
194 | static int hwpoison_inject_fd; |
195 | static int hwpoison_forget_fd; | |
196 | ||
35efa5e9 WF |
197 | #define HASH_SHIFT 13 |
198 | #define HASH_SIZE (1 << HASH_SHIFT) | |
199 | #define HASH_MASK (HASH_SIZE - 1) | |
200 | #define HASH_KEY(flags) (flags & HASH_MASK) | |
201 | ||
202 | static unsigned long total_pages; | |
203 | static unsigned long nr_pages[HASH_SIZE]; | |
c6dd897f | 204 | static uint64_t page_flags[HASH_SIZE]; |
35efa5e9 WF |
205 | |
206 | ||
207 | /* | |
208 | * helper functions | |
209 | */ | |
210 | ||
211 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) | |
212 | ||
213 | #define min_t(type, x, y) ({ \ | |
214 | type __min1 = (x); \ | |
215 | type __min2 = (y); \ | |
216 | __min1 < __min2 ? __min1 : __min2; }) | |
217 | ||
0b4b2ad5 WF |
218 | #define max_t(type, x, y) ({ \ |
219 | type __max1 = (x); \ | |
220 | type __max2 = (y); \ | |
221 | __max1 > __max2 ? __max1 : __max2; }) | |
222 | ||
b7ed698c | 223 | static unsigned long pages2mb(unsigned long pages) |
35efa5e9 WF |
224 | { |
225 | return (pages * page_size) >> 20; | |
226 | } | |
227 | ||
b7ed698c | 228 | static void fatal(const char *x, ...) |
35efa5e9 WF |
229 | { |
230 | va_list ap; | |
231 | ||
232 | va_start(ap, x); | |
233 | vfprintf(stderr, x, ap); | |
234 | va_end(ap); | |
235 | exit(EXIT_FAILURE); | |
236 | } | |
237 | ||
1b98c00b | 238 | static int checked_open(const char *pathname, int flags) |
31bbf66e WF |
239 | { |
240 | int fd = open(pathname, flags); | |
241 | ||
242 | if (fd < 0) { | |
243 | perror(pathname); | |
244 | exit(EXIT_FAILURE); | |
245 | } | |
246 | ||
247 | return fd; | |
248 | } | |
249 | ||
4a1b6726 WF |
250 | /* |
251 | * pagemap/kpageflags routines | |
252 | */ | |
253 | ||
c7905f20 | 254 | static unsigned long do_u64_read(int fd, const char *name, |
4a1b6726 WF |
255 | uint64_t *buf, |
256 | unsigned long index, | |
257 | unsigned long count) | |
258 | { | |
259 | long bytes; | |
260 | ||
261 | if (index > ULONG_MAX / 8) | |
262 | fatal("index overflow: %lu\n", index); | |
263 | ||
65a6a410 | 264 | bytes = pread(fd, buf, count * 8, (off_t)index * 8); |
4a1b6726 WF |
265 | if (bytes < 0) { |
266 | perror(name); | |
267 | exit(EXIT_FAILURE); | |
268 | } | |
269 | if (bytes % 8) | |
270 | fatal("partial read: %lu bytes\n", bytes); | |
271 | ||
272 | return bytes / 8; | |
273 | } | |
274 | ||
275 | static unsigned long kpageflags_read(uint64_t *buf, | |
276 | unsigned long index, | |
277 | unsigned long pages) | |
278 | { | |
c7905f20 | 279 | return do_u64_read(kpageflags_fd, opt_kpageflags, buf, index, pages); |
4a1b6726 WF |
280 | } |
281 | ||
075db150 KK |
282 | static unsigned long kpagecgroup_read(uint64_t *buf, |
283 | unsigned long index, | |
284 | unsigned long pages) | |
285 | { | |
286 | if (kpagecgroup_fd < 0) | |
287 | return pages; | |
288 | ||
c7905f20 | 289 | return do_u64_read(kpagecgroup_fd, opt_kpageflags, buf, index, pages); |
075db150 KK |
290 | } |
291 | ||
7f1d23e6 CH |
292 | static unsigned long kpagecount_read(uint64_t *buf, |
293 | unsigned long index, | |
294 | unsigned long pages) | |
295 | { | |
296 | return kpagecount_fd < 0 ? pages : | |
297 | do_u64_read(kpagecount_fd, PROC_KPAGECOUNT, | |
298 | buf, index, pages); | |
299 | } | |
300 | ||
4a1b6726 WF |
301 | static unsigned long pagemap_read(uint64_t *buf, |
302 | unsigned long index, | |
303 | unsigned long pages) | |
304 | { | |
305 | return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages); | |
306 | } | |
307 | ||
308 | static unsigned long pagemap_pfn(uint64_t val) | |
309 | { | |
310 | unsigned long pfn; | |
311 | ||
312 | if (val & PM_PRESENT) | |
313 | pfn = PM_PFRAME(val); | |
314 | else | |
315 | pfn = 0; | |
316 | ||
317 | return pfn; | |
318 | } | |
319 | ||
0335ddd3 NH |
320 | static unsigned long pagemap_swap_offset(uint64_t val) |
321 | { | |
322 | return val & PM_SWAP ? PM_SWAP_OFFSET(val) : 0; | |
323 | } | |
35efa5e9 WF |
324 | |
325 | /* | |
326 | * page flag names | |
327 | */ | |
328 | ||
b7ed698c | 329 | static char *page_flag_name(uint64_t flags) |
35efa5e9 WF |
330 | { |
331 | static char buf[65]; | |
332 | int present; | |
e30d539b | 333 | size_t i, j; |
35efa5e9 WF |
334 | |
335 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
336 | present = (flags >> i) & 1; | |
337 | if (!page_flag_names[i]) { | |
338 | if (present) | |
af901ca1 | 339 | fatal("unknown flag bit %d\n", i); |
35efa5e9 WF |
340 | continue; |
341 | } | |
342 | buf[j++] = present ? page_flag_names[i][0] : '_'; | |
343 | } | |
344 | ||
345 | return buf; | |
346 | } | |
347 | ||
b7ed698c | 348 | static char *page_flag_longname(uint64_t flags) |
35efa5e9 WF |
349 | { |
350 | static char buf[1024]; | |
e30d539b | 351 | size_t i, n; |
35efa5e9 WF |
352 | |
353 | for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
354 | if (!page_flag_names[i]) | |
355 | continue; | |
356 | if ((flags >> i) & 1) | |
357 | n += snprintf(buf + n, sizeof(buf) - n, "%s,", | |
358 | page_flag_names[i] + 2); | |
359 | } | |
360 | if (n) | |
361 | n--; | |
362 | buf[n] = '\0'; | |
363 | ||
364 | return buf; | |
365 | } | |
366 | ||
367 | ||
368 | /* | |
369 | * page list and summary | |
370 | */ | |
371 | ||
65a6a410 | 372 | static void show_page_range(unsigned long voffset, unsigned long offset, |
7f1d23e6 CH |
373 | unsigned long size, uint64_t flags, |
374 | uint64_t cgroup, uint64_t mapcnt) | |
35efa5e9 WF |
375 | { |
376 | static uint64_t flags0; | |
075db150 | 377 | static uint64_t cgroup0; |
7f1d23e6 | 378 | static uint64_t mapcnt0; |
0b4b2ad5 | 379 | static unsigned long voff; |
35efa5e9 WF |
380 | static unsigned long index; |
381 | static unsigned long count; | |
382 | ||
7f1d23e6 CH |
383 | if (flags == flags0 && cgroup == cgroup0 && mapcnt == mapcnt0 && |
384 | offset == index + count && size && voffset == voff + count) { | |
65a6a410 | 385 | count += size; |
35efa5e9 WF |
386 | return; |
387 | } | |
388 | ||
0b4b2ad5 WF |
389 | if (count) { |
390 | if (opt_pid) | |
391 | printf("%lx\t", voff); | |
65a6a410 KK |
392 | if (opt_file) |
393 | printf("%lu\t", voff); | |
075db150 KK |
394 | if (opt_list_cgroup) |
395 | printf("@%llu\t", (unsigned long long)cgroup0); | |
7f1d23e6 CH |
396 | if (opt_list_mapcnt) |
397 | printf("%lu\t", mapcnt0); | |
0b4b2ad5 | 398 | printf("%lx\t%lx\t%s\n", |
35efa5e9 | 399 | index, count, page_flag_name(flags0)); |
0b4b2ad5 | 400 | } |
35efa5e9 WF |
401 | |
402 | flags0 = flags; | |
7f1d23e6 CH |
403 | cgroup0 = cgroup; |
404 | mapcnt0 = mapcnt; | |
35efa5e9 | 405 | index = offset; |
0b4b2ad5 | 406 | voff = voffset; |
65a6a410 KK |
407 | count = size; |
408 | } | |
409 | ||
410 | static void flush_page_range(void) | |
411 | { | |
7f1d23e6 | 412 | show_page_range(0, 0, 0, 0, 0, 0); |
35efa5e9 WF |
413 | } |
414 | ||
075db150 | 415 | static void show_page(unsigned long voffset, unsigned long offset, |
7f1d23e6 | 416 | uint64_t flags, uint64_t cgroup, uint64_t mapcnt) |
35efa5e9 | 417 | { |
0b4b2ad5 WF |
418 | if (opt_pid) |
419 | printf("%lx\t", voffset); | |
65a6a410 KK |
420 | if (opt_file) |
421 | printf("%lu\t", voffset); | |
075db150 KK |
422 | if (opt_list_cgroup) |
423 | printf("@%llu\t", (unsigned long long)cgroup); | |
7f1d23e6 CH |
424 | if (opt_list_mapcnt) |
425 | printf("%lu\t", mapcnt); | |
426 | ||
0b4b2ad5 | 427 | printf("%lx\t%s\n", offset, page_flag_name(flags)); |
35efa5e9 WF |
428 | } |
429 | ||
b7ed698c | 430 | static void show_summary(void) |
35efa5e9 | 431 | { |
e30d539b | 432 | size_t i; |
35efa5e9 WF |
433 | |
434 | printf(" flags\tpage-count MB" | |
435 | " symbolic-flags\t\t\tlong-symbolic-flags\n"); | |
436 | ||
437 | for (i = 0; i < ARRAY_SIZE(nr_pages); i++) { | |
438 | if (nr_pages[i]) | |
439 | printf("0x%016llx\t%10lu %8lu %s\t%s\n", | |
440 | (unsigned long long)page_flags[i], | |
441 | nr_pages[i], | |
442 | pages2mb(nr_pages[i]), | |
443 | page_flag_name(page_flags[i]), | |
444 | page_flag_longname(page_flags[i])); | |
445 | } | |
446 | ||
447 | printf(" total\t%10lu %8lu\n", | |
448 | total_pages, pages2mb(total_pages)); | |
449 | } | |
450 | ||
451 | ||
452 | /* | |
453 | * page flag filters | |
454 | */ | |
455 | ||
b7ed698c | 456 | static int bit_mask_ok(uint64_t flags) |
35efa5e9 WF |
457 | { |
458 | int i; | |
459 | ||
460 | for (i = 0; i < nr_bit_filters; i++) { | |
461 | if (opt_bits[i] == KPF_ALL_BITS) { | |
462 | if ((flags & opt_mask[i]) == 0) | |
463 | return 0; | |
464 | } else { | |
465 | if ((flags & opt_mask[i]) != opt_bits[i]) | |
466 | return 0; | |
467 | } | |
468 | } | |
469 | ||
470 | return 1; | |
471 | } | |
472 | ||
46c77e2b | 473 | static uint64_t expand_overloaded_flags(uint64_t flags, uint64_t pme) |
35efa5e9 WF |
474 | { |
475 | /* SLOB/SLUB overload several page flags */ | |
476 | if (flags & BIT(SLAB)) { | |
477 | if (flags & BIT(PRIVATE)) | |
478 | flags ^= BIT(PRIVATE) | BIT(SLOB_FREE); | |
479 | if (flags & BIT(ACTIVE)) | |
480 | flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN); | |
481 | if (flags & BIT(ERROR)) | |
482 | flags ^= BIT(ERROR) | BIT(SLUB_DEBUG); | |
483 | } | |
484 | ||
485 | /* PG_reclaim is overloaded as PG_readahead in the read path */ | |
486 | if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM)) | |
487 | flags ^= BIT(RECLAIM) | BIT(READAHEAD); | |
488 | ||
46c77e2b NH |
489 | if (pme & PM_SOFT_DIRTY) |
490 | flags |= BIT(SOFTDIRTY); | |
77bb499b KK |
491 | if (pme & PM_FILE) |
492 | flags |= BIT(FILE); | |
0335ddd3 NH |
493 | if (pme & PM_SWAP) |
494 | flags |= BIT(SWAP); | |
77bb499b KK |
495 | if (pme & PM_MMAP_EXCLUSIVE) |
496 | flags |= BIT(MMAP_EXCLUSIVE); | |
46c77e2b | 497 | |
35efa5e9 WF |
498 | return flags; |
499 | } | |
500 | ||
b7ed698c | 501 | static uint64_t well_known_flags(uint64_t flags) |
35efa5e9 WF |
502 | { |
503 | /* hide flags intended only for kernel hacker */ | |
504 | flags &= ~KPF_HACKERS_BITS; | |
505 | ||
506 | /* hide non-hugeTLB compound pages */ | |
507 | if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE))) | |
508 | flags &= ~BITS_COMPOUND; | |
509 | ||
510 | return flags; | |
511 | } | |
512 | ||
46c77e2b | 513 | static uint64_t kpageflags_flags(uint64_t flags, uint64_t pme) |
48640d69 | 514 | { |
46c77e2b NH |
515 | if (opt_raw) |
516 | flags = expand_overloaded_flags(flags, pme); | |
517 | else | |
48640d69 WF |
518 | flags = well_known_flags(flags); |
519 | ||
520 | return flags; | |
521 | } | |
522 | ||
a54fed9f WF |
523 | /* |
524 | * page actions | |
525 | */ | |
526 | ||
527 | static void prepare_hwpoison_fd(void) | |
528 | { | |
12da58b0 CG |
529 | char buf[MAX_PATH + 1]; |
530 | ||
f6489bc2 | 531 | hwpoison_debug_fs = debugfs__mount(); |
5a439645 BP |
532 | if (!hwpoison_debug_fs) { |
533 | perror("mount debugfs"); | |
534 | exit(EXIT_FAILURE); | |
535 | } | |
a54fed9f WF |
536 | |
537 | if (opt_hwpoison && !hwpoison_inject_fd) { | |
12da58b0 CG |
538 | snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn", |
539 | hwpoison_debug_fs); | |
a54fed9f WF |
540 | hwpoison_inject_fd = checked_open(buf, O_WRONLY); |
541 | } | |
542 | ||
543 | if (opt_unpoison && !hwpoison_forget_fd) { | |
12da58b0 CG |
544 | snprintf(buf, MAX_PATH, "%s/hwpoison/unpoison-pfn", |
545 | hwpoison_debug_fs); | |
a54fed9f WF |
546 | hwpoison_forget_fd = checked_open(buf, O_WRONLY); |
547 | } | |
548 | } | |
549 | ||
550 | static int hwpoison_page(unsigned long offset) | |
551 | { | |
552 | char buf[100]; | |
553 | int len; | |
554 | ||
555 | len = sprintf(buf, "0x%lx\n", offset); | |
556 | len = write(hwpoison_inject_fd, buf, len); | |
557 | if (len < 0) { | |
558 | perror("hwpoison inject"); | |
559 | return len; | |
560 | } | |
561 | return 0; | |
562 | } | |
563 | ||
564 | static int unpoison_page(unsigned long offset) | |
565 | { | |
566 | char buf[100]; | |
567 | int len; | |
568 | ||
569 | len = sprintf(buf, "0x%lx\n", offset); | |
570 | len = write(hwpoison_forget_fd, buf, len); | |
571 | if (len < 0) { | |
572 | perror("hwpoison forget"); | |
573 | return len; | |
574 | } | |
575 | return 0; | |
576 | } | |
577 | ||
59ae96ff CH |
578 | static int mark_page_idle(unsigned long offset) |
579 | { | |
580 | static unsigned long off; | |
581 | static uint64_t buf; | |
582 | int len; | |
583 | ||
584 | if ((offset / 64 == off / 64) || buf == 0) { | |
585 | buf |= 1UL << (offset % 64); | |
586 | off = offset; | |
587 | return 0; | |
588 | } | |
589 | ||
590 | len = pwrite(page_idle_fd, &buf, 8, 8 * (off / 64)); | |
591 | if (len < 0) { | |
592 | perror("mark page idle"); | |
593 | return len; | |
594 | } | |
595 | ||
596 | buf = 1UL << (offset % 64); | |
597 | off = offset; | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
35efa5e9 WF |
602 | /* |
603 | * page frame walker | |
604 | */ | |
605 | ||
e30d539b | 606 | static size_t hash_slot(uint64_t flags) |
35efa5e9 | 607 | { |
e30d539b UD |
608 | size_t k = HASH_KEY(flags); |
609 | size_t i; | |
35efa5e9 WF |
610 | |
611 | /* Explicitly reserve slot 0 for flags 0: the following logic | |
612 | * cannot distinguish an unoccupied slot from slot (flags==0). | |
613 | */ | |
614 | if (flags == 0) | |
615 | return 0; | |
616 | ||
617 | /* search through the remaining (HASH_SIZE-1) slots */ | |
618 | for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) { | |
619 | if (!k || k >= ARRAY_SIZE(page_flags)) | |
620 | k = 1; | |
621 | if (page_flags[k] == 0) { | |
622 | page_flags[k] = flags; | |
623 | return k; | |
624 | } | |
625 | if (page_flags[k] == flags) | |
626 | return k; | |
627 | } | |
628 | ||
629 | fatal("hash table full: bump up HASH_SHIFT?\n"); | |
630 | exit(EXIT_FAILURE); | |
631 | } | |
632 | ||
075db150 | 633 | static void add_page(unsigned long voffset, unsigned long offset, |
7f1d23e6 CH |
634 | uint64_t flags, uint64_t cgroup, uint64_t mapcnt, |
635 | uint64_t pme) | |
35efa5e9 | 636 | { |
46c77e2b | 637 | flags = kpageflags_flags(flags, pme); |
35efa5e9 WF |
638 | |
639 | if (!bit_mask_ok(flags)) | |
640 | return; | |
641 | ||
075db150 KK |
642 | if (opt_cgroup && cgroup != (uint64_t)opt_cgroup) |
643 | return; | |
644 | ||
a54fed9f WF |
645 | if (opt_hwpoison) |
646 | hwpoison_page(offset); | |
647 | if (opt_unpoison) | |
648 | unpoison_page(offset); | |
649 | ||
59ae96ff CH |
650 | if (opt_mark_idle) |
651 | mark_page_idle(offset); | |
652 | ||
35efa5e9 | 653 | if (opt_list == 1) |
7f1d23e6 | 654 | show_page_range(voffset, offset, 1, flags, cgroup, mapcnt); |
35efa5e9 | 655 | else if (opt_list == 2) |
7f1d23e6 | 656 | show_page(voffset, offset, flags, cgroup, mapcnt); |
35efa5e9 WF |
657 | |
658 | nr_pages[hash_slot(flags)]++; | |
659 | total_pages++; | |
660 | } | |
661 | ||
4a1b6726 | 662 | #define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */ |
e577ebde WF |
663 | static void walk_pfn(unsigned long voffset, |
664 | unsigned long index, | |
46c77e2b NH |
665 | unsigned long count, |
666 | uint64_t pme) | |
35efa5e9 | 667 | { |
4a1b6726 | 668 | uint64_t buf[KPAGEFLAGS_BATCH]; |
075db150 | 669 | uint64_t cgi[KPAGEFLAGS_BATCH]; |
7f1d23e6 | 670 | uint64_t cnt[KPAGEFLAGS_BATCH]; |
35efa5e9 | 671 | unsigned long batch; |
e30d539b | 672 | unsigned long pages; |
35efa5e9 WF |
673 | unsigned long i; |
674 | ||
d9b2ddf8 NH |
675 | /* |
676 | * kpagecgroup_read() reads only if kpagecgroup were opened, but | |
677 | * /proc/kpagecgroup might even not exist, so it's better to fill | |
678 | * them with zeros here. | |
679 | */ | |
680 | if (count == 1) | |
681 | cgi[0] = 0; | |
682 | else | |
683 | memset(cgi, 0, sizeof cgi); | |
075db150 | 684 | |
35efa5e9 | 685 | while (count) { |
4a1b6726 WF |
686 | batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH); |
687 | pages = kpageflags_read(buf, index, batch); | |
688 | if (pages == 0) | |
35efa5e9 | 689 | break; |
35efa5e9 | 690 | |
075db150 KK |
691 | if (kpagecgroup_read(cgi, index, pages) != pages) |
692 | fatal("kpagecgroup returned fewer pages than expected"); | |
693 | ||
b6fb87b8 | 694 | if (kpagecount_read(cnt, index, pages) != pages) |
7f1d23e6 CH |
695 | fatal("kpagecount returned fewer pages than expected"); |
696 | ||
4a1b6726 | 697 | for (i = 0; i < pages; i++) |
7f1d23e6 CH |
698 | add_page(voffset + i, index + i, |
699 | buf[i], cgi[i], cnt[i], pme); | |
35efa5e9 | 700 | |
4a1b6726 WF |
701 | index += pages; |
702 | count -= pages; | |
35efa5e9 WF |
703 | } |
704 | } | |
705 | ||
0335ddd3 NH |
706 | static void walk_swap(unsigned long voffset, uint64_t pme) |
707 | { | |
708 | uint64_t flags = kpageflags_flags(0, pme); | |
709 | ||
710 | if (!bit_mask_ok(flags)) | |
711 | return; | |
712 | ||
075db150 KK |
713 | if (opt_cgroup) |
714 | return; | |
715 | ||
0335ddd3 | 716 | if (opt_list == 1) |
7f1d23e6 CH |
717 | show_page_range(voffset, pagemap_swap_offset(pme), |
718 | 1, flags, 0, 0); | |
0335ddd3 | 719 | else if (opt_list == 2) |
7f1d23e6 | 720 | show_page(voffset, pagemap_swap_offset(pme), flags, 0, 0); |
0335ddd3 NH |
721 | |
722 | nr_pages[hash_slot(flags)]++; | |
723 | total_pages++; | |
724 | } | |
725 | ||
4a1b6726 WF |
726 | #define PAGEMAP_BATCH (64 << 10) |
727 | static void walk_vma(unsigned long index, unsigned long count) | |
0b4b2ad5 | 728 | { |
4a1b6726 WF |
729 | uint64_t buf[PAGEMAP_BATCH]; |
730 | unsigned long batch; | |
731 | unsigned long pages; | |
732 | unsigned long pfn; | |
733 | unsigned long i; | |
0b4b2ad5 | 734 | |
4a1b6726 WF |
735 | while (count) { |
736 | batch = min_t(unsigned long, count, PAGEMAP_BATCH); | |
737 | pages = pagemap_read(buf, index, batch); | |
738 | if (pages == 0) | |
739 | break; | |
0b4b2ad5 | 740 | |
4a1b6726 WF |
741 | for (i = 0; i < pages; i++) { |
742 | pfn = pagemap_pfn(buf[i]); | |
4a1b6726 | 743 | if (pfn) |
46c77e2b | 744 | walk_pfn(index + i, pfn, 1, buf[i]); |
0335ddd3 NH |
745 | if (buf[i] & PM_SWAP) |
746 | walk_swap(index + i, buf[i]); | |
4a1b6726 WF |
747 | } |
748 | ||
749 | index += pages; | |
750 | count -= pages; | |
751 | } | |
0b4b2ad5 WF |
752 | } |
753 | ||
754 | static void walk_task(unsigned long index, unsigned long count) | |
755 | { | |
0b4b2ad5 | 756 | const unsigned long end = index + count; |
e577ebde WF |
757 | unsigned long start; |
758 | int i = 0; | |
0b4b2ad5 WF |
759 | |
760 | while (index < end) { | |
761 | ||
762 | while (pg_end[i] <= index) | |
763 | if (++i >= nr_vmas) | |
764 | return; | |
765 | if (pg_start[i] >= end) | |
766 | return; | |
767 | ||
e577ebde WF |
768 | start = max_t(unsigned long, pg_start[i], index); |
769 | index = min_t(unsigned long, pg_end[i], end); | |
0b4b2ad5 | 770 | |
e577ebde WF |
771 | assert(start < index); |
772 | walk_vma(start, index - start); | |
0b4b2ad5 WF |
773 | } |
774 | } | |
775 | ||
776 | static void add_addr_range(unsigned long offset, unsigned long size) | |
777 | { | |
778 | if (nr_addr_ranges >= MAX_ADDR_RANGES) | |
779 | fatal("too many addr ranges\n"); | |
780 | ||
781 | opt_offset[nr_addr_ranges] = offset; | |
782 | opt_size[nr_addr_ranges] = min_t(unsigned long, size, ULONG_MAX-offset); | |
783 | nr_addr_ranges++; | |
784 | } | |
785 | ||
b7ed698c | 786 | static void walk_addr_ranges(void) |
35efa5e9 WF |
787 | { |
788 | int i; | |
789 | ||
c7905f20 | 790 | kpageflags_fd = checked_open(opt_kpageflags, O_RDONLY); |
35efa5e9 WF |
791 | |
792 | if (!nr_addr_ranges) | |
0b4b2ad5 | 793 | add_addr_range(0, ULONG_MAX); |
35efa5e9 WF |
794 | |
795 | for (i = 0; i < nr_addr_ranges; i++) | |
0b4b2ad5 | 796 | if (!opt_pid) |
65a6a410 | 797 | walk_pfn(opt_offset[i], opt_offset[i], opt_size[i], 0); |
0b4b2ad5 WF |
798 | else |
799 | walk_task(opt_offset[i], opt_size[i]); | |
35efa5e9 | 800 | |
59ae96ff CH |
801 | if (opt_mark_idle) |
802 | mark_page_idle(0); | |
803 | ||
35efa5e9 WF |
804 | close(kpageflags_fd); |
805 | } | |
806 | ||
807 | ||
808 | /* | |
809 | * user interface | |
810 | */ | |
811 | ||
b7ed698c | 812 | static const char *page_flag_type(uint64_t flag) |
35efa5e9 WF |
813 | { |
814 | if (flag & KPF_HACKERS_BITS) | |
815 | return "(r)"; | |
816 | if (flag & KPF_OVERLOADED_BITS) | |
817 | return "(o)"; | |
818 | return " "; | |
819 | } | |
820 | ||
b7ed698c | 821 | static void usage(void) |
35efa5e9 | 822 | { |
e30d539b | 823 | size_t i, j; |
35efa5e9 WF |
824 | |
825 | printf( | |
826 | "page-types [options]\n" | |
9fdcd886 | 827 | " -r|--raw Raw mode, for kernel developers\n" |
dcfe730c | 828 | " -d|--describe flags Describe flags\n" |
9fdcd886 AC |
829 | " -a|--addr addr-spec Walk a range of pages\n" |
830 | " -b|--bits bits-spec Walk pages with specified bits\n" | |
075db150 | 831 | " -c|--cgroup path|@inode Walk pages within memory cgroup\n" |
9fdcd886 | 832 | " -p|--pid pid Walk process address space\n" |
9fdcd886 | 833 | " -f|--file filename Walk file address space\n" |
59ae96ff | 834 | " -i|--mark-idle Mark pages idle\n" |
9fdcd886 AC |
835 | " -l|--list Show page details in ranges\n" |
836 | " -L|--list-each Show page details one by one\n" | |
075db150 | 837 | " -C|--list-cgroup Show cgroup inode for pages\n" |
7f1d23e6 | 838 | " -M|--list-mapcnt Show page map count\n" |
c7825cfa | 839 | " -N|--no-summary Don't show summary info\n" |
9fdcd886 AC |
840 | " -X|--hwpoison hwpoison pages\n" |
841 | " -x|--unpoison unpoison pages\n" | |
c7905f20 | 842 | " -F|--kpageflags filename kpageflags file to parse\n" |
9fdcd886 | 843 | " -h|--help Show this usage message\n" |
dcfe730c | 844 | "flags:\n" |
9fdcd886 AC |
845 | " 0x10 bitfield format, e.g.\n" |
846 | " anon bit-name, e.g.\n" | |
847 | " 0x10,anon comma-separated list, e.g.\n" | |
35efa5e9 | 848 | "addr-spec:\n" |
9fdcd886 AC |
849 | " N one page at offset N (unit: pages)\n" |
850 | " N+M pages range from N to N+M-1\n" | |
851 | " N,M pages range from N to M-1\n" | |
852 | " N, pages range from N to end\n" | |
853 | " ,M pages range from 0 to M-1\n" | |
35efa5e9 | 854 | "bits-spec:\n" |
9fdcd886 AC |
855 | " bit1,bit2 (flags & (bit1|bit2)) != 0\n" |
856 | " bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n" | |
857 | " bit1,~bit2 (flags & (bit1|bit2)) == bit1\n" | |
858 | " =bit1,bit2 flags == (bit1|bit2)\n" | |
35efa5e9 WF |
859 | "bit-names:\n" |
860 | ); | |
861 | ||
862 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
863 | if (!page_flag_names[i]) | |
864 | continue; | |
865 | printf("%16s%s", page_flag_names[i] + 2, | |
866 | page_flag_type(1ULL << i)); | |
867 | if (++j > 3) { | |
868 | j = 0; | |
869 | putchar('\n'); | |
870 | } | |
871 | } | |
872 | printf("\n " | |
873 | "(r) raw mode bits (o) overloaded bits\n"); | |
874 | } | |
875 | ||
b7ed698c | 876 | static unsigned long long parse_number(const char *str) |
35efa5e9 WF |
877 | { |
878 | unsigned long long n; | |
879 | ||
880 | n = strtoll(str, NULL, 0); | |
881 | ||
882 | if (n == 0 && str[0] != '0') | |
883 | fatal("invalid name or number: %s\n", str); | |
884 | ||
885 | return n; | |
886 | } | |
887 | ||
b7ed698c | 888 | static void parse_pid(const char *str) |
35efa5e9 | 889 | { |
0b4b2ad5 WF |
890 | FILE *file; |
891 | char buf[5000]; | |
892 | ||
35efa5e9 | 893 | opt_pid = parse_number(str); |
35efa5e9 | 894 | |
0b4b2ad5 | 895 | sprintf(buf, "/proc/%d/pagemap", opt_pid); |
31bbf66e | 896 | pagemap_fd = checked_open(buf, O_RDONLY); |
0b4b2ad5 WF |
897 | |
898 | sprintf(buf, "/proc/%d/maps", opt_pid); | |
899 | file = fopen(buf, "r"); | |
900 | if (!file) { | |
901 | perror(buf); | |
902 | exit(EXIT_FAILURE); | |
903 | } | |
904 | ||
905 | while (fgets(buf, sizeof(buf), file) != NULL) { | |
906 | unsigned long vm_start; | |
907 | unsigned long vm_end; | |
908 | unsigned long long pgoff; | |
909 | int major, minor; | |
910 | char r, w, x, s; | |
911 | unsigned long ino; | |
912 | int n; | |
913 | ||
914 | n = sscanf(buf, "%lx-%lx %c%c%c%c %llx %x:%x %lu", | |
915 | &vm_start, | |
916 | &vm_end, | |
917 | &r, &w, &x, &s, | |
918 | &pgoff, | |
919 | &major, &minor, | |
920 | &ino); | |
921 | if (n < 10) { | |
922 | fprintf(stderr, "unexpected line: %s\n", buf); | |
923 | continue; | |
924 | } | |
925 | pg_start[nr_vmas] = vm_start / page_size; | |
926 | pg_end[nr_vmas] = vm_end / page_size; | |
927 | if (++nr_vmas >= MAX_VMAS) { | |
928 | fprintf(stderr, "too many VMAs\n"); | |
929 | break; | |
930 | } | |
931 | } | |
932 | fclose(file); | |
35efa5e9 WF |
933 | } |
934 | ||
65a6a410 KK |
935 | static void show_file(const char *name, const struct stat *st) |
936 | { | |
937 | unsigned long long size = st->st_size; | |
938 | char atime[64], mtime[64]; | |
939 | long now = time(NULL); | |
940 | ||
941 | printf("%s\tInode: %u\tSize: %llu (%llu pages)\n", | |
942 | name, (unsigned)st->st_ino, | |
943 | size, (size + page_size - 1) / page_size); | |
944 | ||
945 | strftime(atime, sizeof(atime), "%c", localtime(&st->st_atime)); | |
946 | strftime(mtime, sizeof(mtime), "%c", localtime(&st->st_mtime)); | |
947 | ||
948 | printf("Modify: %s (%ld seconds ago)\nAccess: %s (%ld seconds ago)\n", | |
949 | mtime, now - st->st_mtime, | |
950 | atime, now - st->st_atime); | |
951 | } | |
952 | ||
1d46598b KK |
953 | static sigjmp_buf sigbus_jmp; |
954 | ||
955 | static void * volatile sigbus_addr; | |
956 | ||
957 | static void sigbus_handler(int sig, siginfo_t *info, void *ucontex) | |
958 | { | |
959 | (void)sig; | |
960 | (void)ucontex; | |
961 | sigbus_addr = info ? info->si_addr : NULL; | |
962 | siglongjmp(sigbus_jmp, 1); | |
963 | } | |
964 | ||
965 | static struct sigaction sigbus_action = { | |
966 | .sa_sigaction = sigbus_handler, | |
967 | .sa_flags = SA_SIGINFO, | |
968 | }; | |
969 | ||
65a6a410 KK |
970 | static void walk_file(const char *name, const struct stat *st) |
971 | { | |
972 | uint8_t vec[PAGEMAP_BATCH]; | |
973 | uint64_t buf[PAGEMAP_BATCH], flags; | |
075db150 | 974 | uint64_t cgroup = 0; |
7f1d23e6 | 975 | uint64_t mapcnt = 0; |
65a6a410 | 976 | unsigned long nr_pages, pfn, i; |
1d46598b | 977 | off_t off, end = st->st_size; |
65a6a410 | 978 | int fd; |
65a6a410 KK |
979 | ssize_t len; |
980 | void *ptr; | |
981 | int first = 1; | |
982 | ||
983 | fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW); | |
984 | ||
1d46598b KK |
985 | for (off = 0; off < end; off += len) { |
986 | nr_pages = (end - off + page_size - 1) / page_size; | |
65a6a410 KK |
987 | if (nr_pages > PAGEMAP_BATCH) |
988 | nr_pages = PAGEMAP_BATCH; | |
989 | len = nr_pages * page_size; | |
990 | ||
991 | ptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, off); | |
992 | if (ptr == MAP_FAILED) | |
993 | fatal("mmap failed: %s", name); | |
994 | ||
995 | /* determine cached pages */ | |
996 | if (mincore(ptr, len, vec)) | |
997 | fatal("mincore failed: %s", name); | |
998 | ||
999 | /* turn off readahead */ | |
1000 | if (madvise(ptr, len, MADV_RANDOM)) | |
1001 | fatal("madvice failed: %s", name); | |
1002 | ||
1d46598b KK |
1003 | if (sigsetjmp(sigbus_jmp, 1)) { |
1004 | end = off + sigbus_addr ? sigbus_addr - ptr : 0; | |
1005 | fprintf(stderr, "got sigbus at offset %lld: %s\n", | |
1006 | (long long)end, name); | |
1007 | goto got_sigbus; | |
1008 | } | |
1009 | ||
65a6a410 KK |
1010 | /* populate ptes */ |
1011 | for (i = 0; i < nr_pages ; i++) { | |
1012 | if (vec[i] & 1) | |
1013 | (void)*(volatile int *)(ptr + i * page_size); | |
1014 | } | |
1d46598b | 1015 | got_sigbus: |
65a6a410 KK |
1016 | |
1017 | /* turn off harvesting reference bits */ | |
1018 | if (madvise(ptr, len, MADV_SEQUENTIAL)) | |
1019 | fatal("madvice failed: %s", name); | |
1020 | ||
1021 | if (pagemap_read(buf, (unsigned long)ptr / page_size, | |
1022 | nr_pages) != nr_pages) | |
1023 | fatal("cannot read pagemap"); | |
1024 | ||
1025 | munmap(ptr, len); | |
1026 | ||
1027 | for (i = 0; i < nr_pages; i++) { | |
1028 | pfn = pagemap_pfn(buf[i]); | |
1029 | if (!pfn) | |
1030 | continue; | |
1031 | if (!kpageflags_read(&flags, pfn, 1)) | |
1032 | continue; | |
075db150 KK |
1033 | if (!kpagecgroup_read(&cgroup, pfn, 1)) |
1034 | fatal("kpagecgroup_read failed"); | |
7f1d23e6 CH |
1035 | if (!kpagecount_read(&mapcnt, pfn, 1)) |
1036 | fatal("kpagecount_read failed"); | |
65a6a410 KK |
1037 | if (first && opt_list) { |
1038 | first = 0; | |
1039 | flush_page_range(); | |
1040 | show_file(name, st); | |
1041 | } | |
075db150 | 1042 | add_page(off / page_size + i, pfn, |
7f1d23e6 | 1043 | flags, cgroup, mapcnt, buf[i]); |
65a6a410 KK |
1044 | } |
1045 | } | |
1046 | ||
1047 | close(fd); | |
1048 | } | |
1049 | ||
1050 | int walk_tree(const char *name, const struct stat *st, int type, struct FTW *f) | |
1051 | { | |
1052 | (void)f; | |
1053 | switch (type) { | |
1054 | case FTW_F: | |
1055 | if (S_ISREG(st->st_mode)) | |
1056 | walk_file(name, st); | |
1057 | break; | |
1058 | case FTW_DNR: | |
1059 | fprintf(stderr, "cannot read dir: %s\n", name); | |
1060 | break; | |
1061 | } | |
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | static void walk_page_cache(void) | |
1066 | { | |
1067 | struct stat st; | |
1068 | ||
c7905f20 | 1069 | kpageflags_fd = checked_open(opt_kpageflags, O_RDONLY); |
65a6a410 | 1070 | pagemap_fd = checked_open("/proc/self/pagemap", O_RDONLY); |
1d46598b | 1071 | sigaction(SIGBUS, &sigbus_action, NULL); |
65a6a410 KK |
1072 | |
1073 | if (stat(opt_file, &st)) | |
1074 | fatal("stat failed: %s\n", opt_file); | |
1075 | ||
1076 | if (S_ISREG(st.st_mode)) { | |
1077 | walk_file(opt_file, &st); | |
1078 | } else if (S_ISDIR(st.st_mode)) { | |
1079 | /* do not follow symlinks and mountpoints */ | |
1080 | if (nftw(opt_file, walk_tree, 64, FTW_MOUNT | FTW_PHYS) < 0) | |
1081 | fatal("nftw failed: %s\n", opt_file); | |
1082 | } else | |
1083 | fatal("unhandled file type: %s\n", opt_file); | |
1084 | ||
1085 | close(kpageflags_fd); | |
1086 | close(pagemap_fd); | |
1d46598b | 1087 | signal(SIGBUS, SIG_DFL); |
65a6a410 KK |
1088 | } |
1089 | ||
0b4b2ad5 | 1090 | static void parse_file(const char *name) |
35efa5e9 | 1091 | { |
65a6a410 | 1092 | opt_file = name; |
35efa5e9 WF |
1093 | } |
1094 | ||
075db150 KK |
1095 | static void parse_cgroup(const char *path) |
1096 | { | |
1097 | if (path[0] == '@') { | |
1098 | opt_cgroup = parse_number(path + 1); | |
1099 | return; | |
1100 | } | |
1101 | ||
1102 | struct stat st; | |
1103 | ||
1104 | if (stat(path, &st)) | |
1105 | fatal("stat failed: %s: %m\n", path); | |
1106 | ||
1107 | if (!S_ISDIR(st.st_mode)) | |
1108 | fatal("cgroup supposed to be a directory: %s\n", path); | |
1109 | ||
1110 | opt_cgroup = st.st_ino; | |
1111 | } | |
1112 | ||
b7ed698c | 1113 | static void parse_addr_range(const char *optarg) |
35efa5e9 WF |
1114 | { |
1115 | unsigned long offset; | |
1116 | unsigned long size; | |
1117 | char *p; | |
1118 | ||
1119 | p = strchr(optarg, ','); | |
1120 | if (!p) | |
1121 | p = strchr(optarg, '+'); | |
1122 | ||
1123 | if (p == optarg) { | |
1124 | offset = 0; | |
1125 | size = parse_number(p + 1); | |
1126 | } else if (p) { | |
1127 | offset = parse_number(optarg); | |
1128 | if (p[1] == '\0') | |
1129 | size = ULONG_MAX; | |
1130 | else { | |
1131 | size = parse_number(p + 1); | |
1132 | if (*p == ',') { | |
1133 | if (size < offset) | |
1134 | fatal("invalid range: %lu,%lu\n", | |
1135 | offset, size); | |
1136 | size -= offset; | |
1137 | } | |
1138 | } | |
1139 | } else { | |
1140 | offset = parse_number(optarg); | |
1141 | size = 1; | |
1142 | } | |
1143 | ||
1144 | add_addr_range(offset, size); | |
1145 | } | |
1146 | ||
b7ed698c | 1147 | static void add_bits_filter(uint64_t mask, uint64_t bits) |
35efa5e9 WF |
1148 | { |
1149 | if (nr_bit_filters >= MAX_BIT_FILTERS) | |
1150 | fatal("too much bit filters\n"); | |
1151 | ||
1152 | opt_mask[nr_bit_filters] = mask; | |
1153 | opt_bits[nr_bit_filters] = bits; | |
1154 | nr_bit_filters++; | |
1155 | } | |
1156 | ||
b7ed698c | 1157 | static uint64_t parse_flag_name(const char *str, int len) |
35efa5e9 | 1158 | { |
e30d539b | 1159 | size_t i; |
35efa5e9 WF |
1160 | |
1161 | if (!*str || !len) | |
1162 | return 0; | |
1163 | ||
1164 | if (len <= 8 && !strncmp(str, "compound", len)) | |
1165 | return BITS_COMPOUND; | |
1166 | ||
1167 | for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
1168 | if (!page_flag_names[i]) | |
1169 | continue; | |
1170 | if (!strncmp(str, page_flag_names[i] + 2, len)) | |
1171 | return 1ULL << i; | |
1172 | } | |
1173 | ||
1174 | return parse_number(str); | |
1175 | } | |
1176 | ||
b7ed698c | 1177 | static uint64_t parse_flag_names(const char *str, int all) |
35efa5e9 WF |
1178 | { |
1179 | const char *p = str; | |
1180 | uint64_t flags = 0; | |
1181 | ||
1182 | while (1) { | |
1183 | if (*p == ',' || *p == '=' || *p == '\0') { | |
1184 | if ((*str != '~') || (*str == '~' && all && *++str)) | |
1185 | flags |= parse_flag_name(str, p - str); | |
1186 | if (*p != ',') | |
1187 | break; | |
1188 | str = p + 1; | |
1189 | } | |
1190 | p++; | |
1191 | } | |
1192 | ||
1193 | return flags; | |
1194 | } | |
1195 | ||
b7ed698c | 1196 | static void parse_bits_mask(const char *optarg) |
35efa5e9 WF |
1197 | { |
1198 | uint64_t mask; | |
1199 | uint64_t bits; | |
1200 | const char *p; | |
1201 | ||
1202 | p = strchr(optarg, '='); | |
1203 | if (p == optarg) { | |
1204 | mask = KPF_ALL_BITS; | |
1205 | bits = parse_flag_names(p + 1, 0); | |
1206 | } else if (p) { | |
1207 | mask = parse_flag_names(optarg, 0); | |
1208 | bits = parse_flag_names(p + 1, 0); | |
1209 | } else if (strchr(optarg, '~')) { | |
1210 | mask = parse_flag_names(optarg, 1); | |
1211 | bits = parse_flag_names(optarg, 0); | |
1212 | } else { | |
1213 | mask = parse_flag_names(optarg, 0); | |
1214 | bits = KPF_ALL_BITS; | |
1215 | } | |
1216 | ||
1217 | add_bits_filter(mask, bits); | |
1218 | } | |
1219 | ||
c7905f20 DR |
1220 | static void parse_kpageflags(const char *name) |
1221 | { | |
1222 | opt_kpageflags = name; | |
1223 | } | |
1224 | ||
dcfe730c AC |
1225 | static void describe_flags(const char *optarg) |
1226 | { | |
1227 | uint64_t flags = parse_flag_names(optarg, 0); | |
1228 | ||
1229 | printf("0x%016llx\t%s\t%s\n", | |
1230 | (unsigned long long)flags, | |
1231 | page_flag_name(flags), | |
1232 | page_flag_longname(flags)); | |
1233 | } | |
35efa5e9 | 1234 | |
3428838d | 1235 | static const struct option opts[] = { |
35efa5e9 WF |
1236 | { "raw" , 0, NULL, 'r' }, |
1237 | { "pid" , 1, NULL, 'p' }, | |
1238 | { "file" , 1, NULL, 'f' }, | |
1239 | { "addr" , 1, NULL, 'a' }, | |
1240 | { "bits" , 1, NULL, 'b' }, | |
075db150 | 1241 | { "cgroup" , 1, NULL, 'c' }, |
dcfe730c | 1242 | { "describe" , 1, NULL, 'd' }, |
59ae96ff | 1243 | { "mark-idle" , 0, NULL, 'i' }, |
35efa5e9 WF |
1244 | { "list" , 0, NULL, 'l' }, |
1245 | { "list-each" , 0, NULL, 'L' }, | |
075db150 | 1246 | { "list-cgroup", 0, NULL, 'C' }, |
7f1d23e6 | 1247 | { "list-mapcnt", 0, NULL, 'M' }, |
35efa5e9 | 1248 | { "no-summary", 0, NULL, 'N' }, |
a54fed9f WF |
1249 | { "hwpoison" , 0, NULL, 'X' }, |
1250 | { "unpoison" , 0, NULL, 'x' }, | |
c7905f20 | 1251 | { "kpageflags", 0, NULL, 'F' }, |
35efa5e9 WF |
1252 | { "help" , 0, NULL, 'h' }, |
1253 | { NULL , 0, NULL, 0 } | |
1254 | }; | |
1255 | ||
1256 | int main(int argc, char *argv[]) | |
1257 | { | |
1258 | int c; | |
1259 | ||
1260 | page_size = getpagesize(); | |
1261 | ||
1262 | while ((c = getopt_long(argc, argv, | |
59ae96ff | 1263 | "rp:f:a:b:d:c:CilLMNXxF:h", |
7f1d23e6 | 1264 | opts, NULL)) != -1) { |
35efa5e9 WF |
1265 | switch (c) { |
1266 | case 'r': | |
1267 | opt_raw = 1; | |
1268 | break; | |
1269 | case 'p': | |
1270 | parse_pid(optarg); | |
1271 | break; | |
1272 | case 'f': | |
1273 | parse_file(optarg); | |
1274 | break; | |
1275 | case 'a': | |
1276 | parse_addr_range(optarg); | |
1277 | break; | |
1278 | case 'b': | |
1279 | parse_bits_mask(optarg); | |
1280 | break; | |
075db150 KK |
1281 | case 'c': |
1282 | parse_cgroup(optarg); | |
1283 | break; | |
1284 | case 'C': | |
1285 | opt_list_cgroup = 1; | |
1286 | break; | |
dcfe730c | 1287 | case 'd': |
dcfe730c | 1288 | describe_flags(optarg); |
bb86a733 | 1289 | exit(0); |
59ae96ff CH |
1290 | case 'i': |
1291 | opt_mark_idle = 1; | |
1292 | break; | |
35efa5e9 WF |
1293 | case 'l': |
1294 | opt_list = 1; | |
1295 | break; | |
1296 | case 'L': | |
1297 | opt_list = 2; | |
1298 | break; | |
7f1d23e6 CH |
1299 | case 'M': |
1300 | opt_list_mapcnt = 1; | |
1301 | break; | |
35efa5e9 WF |
1302 | case 'N': |
1303 | opt_no_summary = 1; | |
1304 | break; | |
a54fed9f WF |
1305 | case 'X': |
1306 | opt_hwpoison = 1; | |
1307 | prepare_hwpoison_fd(); | |
1308 | break; | |
1309 | case 'x': | |
1310 | opt_unpoison = 1; | |
1311 | prepare_hwpoison_fd(); | |
1312 | break; | |
c7905f20 DR |
1313 | case 'F': |
1314 | parse_kpageflags(optarg); | |
1315 | break; | |
35efa5e9 WF |
1316 | case 'h': |
1317 | usage(); | |
1318 | exit(0); | |
1319 | default: | |
1320 | usage(); | |
1321 | exit(1); | |
1322 | } | |
1323 | } | |
1324 | ||
c7905f20 DR |
1325 | if (!opt_kpageflags) |
1326 | opt_kpageflags = PROC_KPAGEFLAGS; | |
1327 | ||
075db150 KK |
1328 | if (opt_cgroup || opt_list_cgroup) |
1329 | kpagecgroup_fd = checked_open(PROC_KPAGECGROUP, O_RDONLY); | |
1330 | ||
7f1d23e6 CH |
1331 | if (opt_list && opt_list_mapcnt) |
1332 | kpagecount_fd = checked_open(PROC_KPAGECOUNT, O_RDONLY); | |
1333 | ||
ebaeab2f | 1334 | if (opt_mark_idle) |
59ae96ff CH |
1335 | page_idle_fd = checked_open(SYS_KERNEL_MM_PAGE_IDLE, O_RDWR); |
1336 | ||
0b4b2ad5 WF |
1337 | if (opt_list && opt_pid) |
1338 | printf("voffset\t"); | |
65a6a410 KK |
1339 | if (opt_list && opt_file) |
1340 | printf("foffset\t"); | |
075db150 KK |
1341 | if (opt_list && opt_list_cgroup) |
1342 | printf("cgroup\t"); | |
7f1d23e6 CH |
1343 | if (opt_list && opt_list_mapcnt) |
1344 | printf("map-cnt\t"); | |
1345 | ||
35efa5e9 | 1346 | if (opt_list == 1) |
0b4b2ad5 | 1347 | printf("offset\tlen\tflags\n"); |
35efa5e9 WF |
1348 | if (opt_list == 2) |
1349 | printf("offset\tflags\n"); | |
1350 | ||
65a6a410 KK |
1351 | if (opt_file) |
1352 | walk_page_cache(); | |
1353 | else | |
1354 | walk_addr_ranges(); | |
35efa5e9 WF |
1355 | |
1356 | if (opt_list == 1) | |
65a6a410 | 1357 | flush_page_range(); |
35efa5e9 WF |
1358 | |
1359 | if (opt_no_summary) | |
1360 | return 0; | |
1361 | ||
1362 | if (opt_list) | |
1363 | printf("\n\n"); | |
1364 | ||
1365 | show_summary(); | |
1366 | ||
7f1d23e6 CH |
1367 | if (opt_list_mapcnt) |
1368 | close(kpagecount_fd); | |
1369 | ||
59ae96ff CH |
1370 | if (page_idle_fd >= 0) |
1371 | close(page_idle_fd); | |
1372 | ||
35efa5e9 WF |
1373 | return 0; |
1374 | } |