Commit | Line | Data |
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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 | 82 | |
78fbe906 | 83 | /* [47-] take some arbitrary free slots for expanding overloaded flags |
35efa5e9 WF |
84 | * not part of kernel API |
85 | */ | |
78fbe906 | 86 | #define KPF_ANON_EXCLUSIVE 47 |
35efa5e9 | 87 | #define KPF_READAHEAD 48 |
35efa5e9 WF |
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 | 140 | |
78fbe906 | 141 | [KPF_ANON_EXCLUSIVE] = "d:anon_exclusive", |
35efa5e9 | 142 | [KPF_READAHEAD] = "I:readahead", |
35efa5e9 WF |
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 | 392 | if (opt_file) |
41d4613b | 393 | printf("%lx\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 | 420 | if (opt_file) |
41d4613b | 421 | printf("%lx\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 | 474 | { |
78fbe906 DH |
475 | /* Anonymous pages overload PG_mappedtodisk */ |
476 | if ((flags & BIT(ANON)) && (flags & BIT(MAPPEDTODISK))) | |
477 | flags ^= BIT(MAPPEDTODISK) | BIT(ANON_EXCLUSIVE); | |
478 | ||
c4ba69f0 | 479 | /* SLUB overloads several page flags */ |
35efa5e9 | 480 | if (flags & BIT(SLAB)) { |
35efa5e9 WF |
481 | if (flags & BIT(ACTIVE)) |
482 | flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN); | |
483 | if (flags & BIT(ERROR)) | |
484 | flags ^= BIT(ERROR) | BIT(SLUB_DEBUG); | |
485 | } | |
486 | ||
487 | /* PG_reclaim is overloaded as PG_readahead in the read path */ | |
488 | if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM)) | |
489 | flags ^= BIT(RECLAIM) | BIT(READAHEAD); | |
490 | ||
46c77e2b NH |
491 | if (pme & PM_SOFT_DIRTY) |
492 | flags |= BIT(SOFTDIRTY); | |
77bb499b KK |
493 | if (pme & PM_FILE) |
494 | flags |= BIT(FILE); | |
0335ddd3 NH |
495 | if (pme & PM_SWAP) |
496 | flags |= BIT(SWAP); | |
77bb499b KK |
497 | if (pme & PM_MMAP_EXCLUSIVE) |
498 | flags |= BIT(MMAP_EXCLUSIVE); | |
46c77e2b | 499 | |
35efa5e9 WF |
500 | return flags; |
501 | } | |
502 | ||
b7ed698c | 503 | static uint64_t well_known_flags(uint64_t flags) |
35efa5e9 WF |
504 | { |
505 | /* hide flags intended only for kernel hacker */ | |
506 | flags &= ~KPF_HACKERS_BITS; | |
507 | ||
508 | /* hide non-hugeTLB compound pages */ | |
509 | if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE))) | |
510 | flags &= ~BITS_COMPOUND; | |
511 | ||
512 | return flags; | |
513 | } | |
514 | ||
46c77e2b | 515 | static uint64_t kpageflags_flags(uint64_t flags, uint64_t pme) |
48640d69 | 516 | { |
46c77e2b NH |
517 | if (opt_raw) |
518 | flags = expand_overloaded_flags(flags, pme); | |
519 | else | |
48640d69 WF |
520 | flags = well_known_flags(flags); |
521 | ||
522 | return flags; | |
523 | } | |
524 | ||
a54fed9f WF |
525 | /* |
526 | * page actions | |
527 | */ | |
528 | ||
529 | static void prepare_hwpoison_fd(void) | |
530 | { | |
12da58b0 CG |
531 | char buf[MAX_PATH + 1]; |
532 | ||
f6489bc2 | 533 | hwpoison_debug_fs = debugfs__mount(); |
5a439645 BP |
534 | if (!hwpoison_debug_fs) { |
535 | perror("mount debugfs"); | |
536 | exit(EXIT_FAILURE); | |
537 | } | |
a54fed9f WF |
538 | |
539 | if (opt_hwpoison && !hwpoison_inject_fd) { | |
12da58b0 CG |
540 | snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn", |
541 | hwpoison_debug_fs); | |
a54fed9f WF |
542 | hwpoison_inject_fd = checked_open(buf, O_WRONLY); |
543 | } | |
544 | ||
545 | if (opt_unpoison && !hwpoison_forget_fd) { | |
12da58b0 CG |
546 | snprintf(buf, MAX_PATH, "%s/hwpoison/unpoison-pfn", |
547 | hwpoison_debug_fs); | |
a54fed9f WF |
548 | hwpoison_forget_fd = checked_open(buf, O_WRONLY); |
549 | } | |
550 | } | |
551 | ||
552 | static int hwpoison_page(unsigned long offset) | |
553 | { | |
554 | char buf[100]; | |
555 | int len; | |
556 | ||
557 | len = sprintf(buf, "0x%lx\n", offset); | |
558 | len = write(hwpoison_inject_fd, buf, len); | |
559 | if (len < 0) { | |
560 | perror("hwpoison inject"); | |
561 | return len; | |
562 | } | |
563 | return 0; | |
564 | } | |
565 | ||
566 | static int unpoison_page(unsigned long offset) | |
567 | { | |
568 | char buf[100]; | |
569 | int len; | |
570 | ||
571 | len = sprintf(buf, "0x%lx\n", offset); | |
572 | len = write(hwpoison_forget_fd, buf, len); | |
573 | if (len < 0) { | |
574 | perror("hwpoison forget"); | |
575 | return len; | |
576 | } | |
577 | return 0; | |
578 | } | |
579 | ||
59ae96ff CH |
580 | static int mark_page_idle(unsigned long offset) |
581 | { | |
582 | static unsigned long off; | |
583 | static uint64_t buf; | |
584 | int len; | |
585 | ||
586 | if ((offset / 64 == off / 64) || buf == 0) { | |
587 | buf |= 1UL << (offset % 64); | |
588 | off = offset; | |
589 | return 0; | |
590 | } | |
591 | ||
592 | len = pwrite(page_idle_fd, &buf, 8, 8 * (off / 64)); | |
593 | if (len < 0) { | |
594 | perror("mark page idle"); | |
595 | return len; | |
596 | } | |
597 | ||
598 | buf = 1UL << (offset % 64); | |
599 | off = offset; | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
35efa5e9 WF |
604 | /* |
605 | * page frame walker | |
606 | */ | |
607 | ||
e30d539b | 608 | static size_t hash_slot(uint64_t flags) |
35efa5e9 | 609 | { |
e30d539b UD |
610 | size_t k = HASH_KEY(flags); |
611 | size_t i; | |
35efa5e9 WF |
612 | |
613 | /* Explicitly reserve slot 0 for flags 0: the following logic | |
614 | * cannot distinguish an unoccupied slot from slot (flags==0). | |
615 | */ | |
616 | if (flags == 0) | |
617 | return 0; | |
618 | ||
619 | /* search through the remaining (HASH_SIZE-1) slots */ | |
620 | for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) { | |
621 | if (!k || k >= ARRAY_SIZE(page_flags)) | |
622 | k = 1; | |
623 | if (page_flags[k] == 0) { | |
624 | page_flags[k] = flags; | |
625 | return k; | |
626 | } | |
627 | if (page_flags[k] == flags) | |
628 | return k; | |
629 | } | |
630 | ||
631 | fatal("hash table full: bump up HASH_SHIFT?\n"); | |
632 | exit(EXIT_FAILURE); | |
633 | } | |
634 | ||
075db150 | 635 | static void add_page(unsigned long voffset, unsigned long offset, |
7f1d23e6 CH |
636 | uint64_t flags, uint64_t cgroup, uint64_t mapcnt, |
637 | uint64_t pme) | |
35efa5e9 | 638 | { |
46c77e2b | 639 | flags = kpageflags_flags(flags, pme); |
35efa5e9 WF |
640 | |
641 | if (!bit_mask_ok(flags)) | |
642 | return; | |
643 | ||
075db150 KK |
644 | if (opt_cgroup && cgroup != (uint64_t)opt_cgroup) |
645 | return; | |
646 | ||
a54fed9f WF |
647 | if (opt_hwpoison) |
648 | hwpoison_page(offset); | |
649 | if (opt_unpoison) | |
650 | unpoison_page(offset); | |
651 | ||
59ae96ff CH |
652 | if (opt_mark_idle) |
653 | mark_page_idle(offset); | |
654 | ||
35efa5e9 | 655 | if (opt_list == 1) |
7f1d23e6 | 656 | show_page_range(voffset, offset, 1, flags, cgroup, mapcnt); |
35efa5e9 | 657 | else if (opt_list == 2) |
7f1d23e6 | 658 | show_page(voffset, offset, flags, cgroup, mapcnt); |
35efa5e9 WF |
659 | |
660 | nr_pages[hash_slot(flags)]++; | |
661 | total_pages++; | |
662 | } | |
663 | ||
4a1b6726 | 664 | #define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */ |
e577ebde WF |
665 | static void walk_pfn(unsigned long voffset, |
666 | unsigned long index, | |
46c77e2b NH |
667 | unsigned long count, |
668 | uint64_t pme) | |
35efa5e9 | 669 | { |
4a1b6726 | 670 | uint64_t buf[KPAGEFLAGS_BATCH]; |
075db150 | 671 | uint64_t cgi[KPAGEFLAGS_BATCH]; |
7f1d23e6 | 672 | uint64_t cnt[KPAGEFLAGS_BATCH]; |
35efa5e9 | 673 | unsigned long batch; |
e30d539b | 674 | unsigned long pages; |
35efa5e9 WF |
675 | unsigned long i; |
676 | ||
d9b2ddf8 NH |
677 | /* |
678 | * kpagecgroup_read() reads only if kpagecgroup were opened, but | |
679 | * /proc/kpagecgroup might even not exist, so it's better to fill | |
680 | * them with zeros here. | |
681 | */ | |
682 | if (count == 1) | |
683 | cgi[0] = 0; | |
684 | else | |
685 | memset(cgi, 0, sizeof cgi); | |
075db150 | 686 | |
35efa5e9 | 687 | while (count) { |
4a1b6726 WF |
688 | batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH); |
689 | pages = kpageflags_read(buf, index, batch); | |
690 | if (pages == 0) | |
35efa5e9 | 691 | break; |
35efa5e9 | 692 | |
075db150 KK |
693 | if (kpagecgroup_read(cgi, index, pages) != pages) |
694 | fatal("kpagecgroup returned fewer pages than expected"); | |
695 | ||
b6fb87b8 | 696 | if (kpagecount_read(cnt, index, pages) != pages) |
7f1d23e6 CH |
697 | fatal("kpagecount returned fewer pages than expected"); |
698 | ||
4a1b6726 | 699 | for (i = 0; i < pages; i++) |
7f1d23e6 CH |
700 | add_page(voffset + i, index + i, |
701 | buf[i], cgi[i], cnt[i], pme); | |
35efa5e9 | 702 | |
4a1b6726 WF |
703 | index += pages; |
704 | count -= pages; | |
35efa5e9 WF |
705 | } |
706 | } | |
707 | ||
0335ddd3 NH |
708 | static void walk_swap(unsigned long voffset, uint64_t pme) |
709 | { | |
710 | uint64_t flags = kpageflags_flags(0, pme); | |
711 | ||
712 | if (!bit_mask_ok(flags)) | |
713 | return; | |
714 | ||
075db150 KK |
715 | if (opt_cgroup) |
716 | return; | |
717 | ||
0335ddd3 | 718 | if (opt_list == 1) |
7f1d23e6 CH |
719 | show_page_range(voffset, pagemap_swap_offset(pme), |
720 | 1, flags, 0, 0); | |
0335ddd3 | 721 | else if (opt_list == 2) |
7f1d23e6 | 722 | show_page(voffset, pagemap_swap_offset(pme), flags, 0, 0); |
0335ddd3 NH |
723 | |
724 | nr_pages[hash_slot(flags)]++; | |
725 | total_pages++; | |
726 | } | |
727 | ||
4a1b6726 WF |
728 | #define PAGEMAP_BATCH (64 << 10) |
729 | static void walk_vma(unsigned long index, unsigned long count) | |
0b4b2ad5 | 730 | { |
4a1b6726 WF |
731 | uint64_t buf[PAGEMAP_BATCH]; |
732 | unsigned long batch; | |
733 | unsigned long pages; | |
734 | unsigned long pfn; | |
735 | unsigned long i; | |
0b4b2ad5 | 736 | |
4a1b6726 WF |
737 | while (count) { |
738 | batch = min_t(unsigned long, count, PAGEMAP_BATCH); | |
739 | pages = pagemap_read(buf, index, batch); | |
740 | if (pages == 0) | |
741 | break; | |
0b4b2ad5 | 742 | |
4a1b6726 WF |
743 | for (i = 0; i < pages; i++) { |
744 | pfn = pagemap_pfn(buf[i]); | |
4a1b6726 | 745 | if (pfn) |
46c77e2b | 746 | walk_pfn(index + i, pfn, 1, buf[i]); |
0335ddd3 NH |
747 | if (buf[i] & PM_SWAP) |
748 | walk_swap(index + i, buf[i]); | |
4a1b6726 WF |
749 | } |
750 | ||
751 | index += pages; | |
752 | count -= pages; | |
753 | } | |
0b4b2ad5 WF |
754 | } |
755 | ||
756 | static void walk_task(unsigned long index, unsigned long count) | |
757 | { | |
0b4b2ad5 | 758 | const unsigned long end = index + count; |
e577ebde WF |
759 | unsigned long start; |
760 | int i = 0; | |
0b4b2ad5 WF |
761 | |
762 | while (index < end) { | |
763 | ||
764 | while (pg_end[i] <= index) | |
765 | if (++i >= nr_vmas) | |
766 | return; | |
767 | if (pg_start[i] >= end) | |
768 | return; | |
769 | ||
e577ebde WF |
770 | start = max_t(unsigned long, pg_start[i], index); |
771 | index = min_t(unsigned long, pg_end[i], end); | |
0b4b2ad5 | 772 | |
e577ebde WF |
773 | assert(start < index); |
774 | walk_vma(start, index - start); | |
0b4b2ad5 WF |
775 | } |
776 | } | |
777 | ||
778 | static void add_addr_range(unsigned long offset, unsigned long size) | |
779 | { | |
780 | if (nr_addr_ranges >= MAX_ADDR_RANGES) | |
781 | fatal("too many addr ranges\n"); | |
782 | ||
783 | opt_offset[nr_addr_ranges] = offset; | |
784 | opt_size[nr_addr_ranges] = min_t(unsigned long, size, ULONG_MAX-offset); | |
785 | nr_addr_ranges++; | |
786 | } | |
787 | ||
b7ed698c | 788 | static void walk_addr_ranges(void) |
35efa5e9 WF |
789 | { |
790 | int i; | |
791 | ||
c7905f20 | 792 | kpageflags_fd = checked_open(opt_kpageflags, O_RDONLY); |
35efa5e9 WF |
793 | |
794 | if (!nr_addr_ranges) | |
0b4b2ad5 | 795 | add_addr_range(0, ULONG_MAX); |
35efa5e9 WF |
796 | |
797 | for (i = 0; i < nr_addr_ranges; i++) | |
0b4b2ad5 | 798 | if (!opt_pid) |
65a6a410 | 799 | walk_pfn(opt_offset[i], opt_offset[i], opt_size[i], 0); |
0b4b2ad5 WF |
800 | else |
801 | walk_task(opt_offset[i], opt_size[i]); | |
35efa5e9 | 802 | |
59ae96ff CH |
803 | if (opt_mark_idle) |
804 | mark_page_idle(0); | |
805 | ||
35efa5e9 WF |
806 | close(kpageflags_fd); |
807 | } | |
808 | ||
809 | ||
810 | /* | |
811 | * user interface | |
812 | */ | |
813 | ||
b7ed698c | 814 | static const char *page_flag_type(uint64_t flag) |
35efa5e9 WF |
815 | { |
816 | if (flag & KPF_HACKERS_BITS) | |
817 | return "(r)"; | |
818 | if (flag & KPF_OVERLOADED_BITS) | |
819 | return "(o)"; | |
820 | return " "; | |
821 | } | |
822 | ||
b7ed698c | 823 | static void usage(void) |
35efa5e9 | 824 | { |
e30d539b | 825 | size_t i, j; |
35efa5e9 WF |
826 | |
827 | printf( | |
828 | "page-types [options]\n" | |
9fdcd886 | 829 | " -r|--raw Raw mode, for kernel developers\n" |
dcfe730c | 830 | " -d|--describe flags Describe flags\n" |
9fdcd886 AC |
831 | " -a|--addr addr-spec Walk a range of pages\n" |
832 | " -b|--bits bits-spec Walk pages with specified bits\n" | |
075db150 | 833 | " -c|--cgroup path|@inode Walk pages within memory cgroup\n" |
9fdcd886 | 834 | " -p|--pid pid Walk process address space\n" |
9fdcd886 | 835 | " -f|--file filename Walk file address space\n" |
59ae96ff | 836 | " -i|--mark-idle Mark pages idle\n" |
9fdcd886 AC |
837 | " -l|--list Show page details in ranges\n" |
838 | " -L|--list-each Show page details one by one\n" | |
075db150 | 839 | " -C|--list-cgroup Show cgroup inode for pages\n" |
7f1d23e6 | 840 | " -M|--list-mapcnt Show page map count\n" |
c7825cfa | 841 | " -N|--no-summary Don't show summary info\n" |
9fdcd886 AC |
842 | " -X|--hwpoison hwpoison pages\n" |
843 | " -x|--unpoison unpoison pages\n" | |
c7905f20 | 844 | " -F|--kpageflags filename kpageflags file to parse\n" |
9fdcd886 | 845 | " -h|--help Show this usage message\n" |
dcfe730c | 846 | "flags:\n" |
9fdcd886 AC |
847 | " 0x10 bitfield format, e.g.\n" |
848 | " anon bit-name, e.g.\n" | |
849 | " 0x10,anon comma-separated list, e.g.\n" | |
35efa5e9 | 850 | "addr-spec:\n" |
9fdcd886 AC |
851 | " N one page at offset N (unit: pages)\n" |
852 | " N+M pages range from N to N+M-1\n" | |
853 | " N,M pages range from N to M-1\n" | |
854 | " N, pages range from N to end\n" | |
855 | " ,M pages range from 0 to M-1\n" | |
35efa5e9 | 856 | "bits-spec:\n" |
9fdcd886 AC |
857 | " bit1,bit2 (flags & (bit1|bit2)) != 0\n" |
858 | " bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n" | |
859 | " bit1,~bit2 (flags & (bit1|bit2)) == bit1\n" | |
860 | " =bit1,bit2 flags == (bit1|bit2)\n" | |
35efa5e9 WF |
861 | "bit-names:\n" |
862 | ); | |
863 | ||
864 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
865 | if (!page_flag_names[i]) | |
866 | continue; | |
867 | printf("%16s%s", page_flag_names[i] + 2, | |
868 | page_flag_type(1ULL << i)); | |
869 | if (++j > 3) { | |
870 | j = 0; | |
871 | putchar('\n'); | |
872 | } | |
873 | } | |
874 | printf("\n " | |
875 | "(r) raw mode bits (o) overloaded bits\n"); | |
876 | } | |
877 | ||
b7ed698c | 878 | static unsigned long long parse_number(const char *str) |
35efa5e9 WF |
879 | { |
880 | unsigned long long n; | |
881 | ||
882 | n = strtoll(str, NULL, 0); | |
883 | ||
884 | if (n == 0 && str[0] != '0') | |
885 | fatal("invalid name or number: %s\n", str); | |
886 | ||
887 | return n; | |
888 | } | |
889 | ||
b7ed698c | 890 | static void parse_pid(const char *str) |
35efa5e9 | 891 | { |
0b4b2ad5 WF |
892 | FILE *file; |
893 | char buf[5000]; | |
894 | ||
35efa5e9 | 895 | opt_pid = parse_number(str); |
35efa5e9 | 896 | |
0b4b2ad5 | 897 | sprintf(buf, "/proc/%d/pagemap", opt_pid); |
31bbf66e | 898 | pagemap_fd = checked_open(buf, O_RDONLY); |
0b4b2ad5 WF |
899 | |
900 | sprintf(buf, "/proc/%d/maps", opt_pid); | |
901 | file = fopen(buf, "r"); | |
902 | if (!file) { | |
903 | perror(buf); | |
904 | exit(EXIT_FAILURE); | |
905 | } | |
906 | ||
907 | while (fgets(buf, sizeof(buf), file) != NULL) { | |
908 | unsigned long vm_start; | |
909 | unsigned long vm_end; | |
910 | unsigned long long pgoff; | |
911 | int major, minor; | |
912 | char r, w, x, s; | |
913 | unsigned long ino; | |
914 | int n; | |
915 | ||
916 | n = sscanf(buf, "%lx-%lx %c%c%c%c %llx %x:%x %lu", | |
917 | &vm_start, | |
918 | &vm_end, | |
919 | &r, &w, &x, &s, | |
920 | &pgoff, | |
921 | &major, &minor, | |
922 | &ino); | |
923 | if (n < 10) { | |
924 | fprintf(stderr, "unexpected line: %s\n", buf); | |
925 | continue; | |
926 | } | |
927 | pg_start[nr_vmas] = vm_start / page_size; | |
928 | pg_end[nr_vmas] = vm_end / page_size; | |
929 | if (++nr_vmas >= MAX_VMAS) { | |
930 | fprintf(stderr, "too many VMAs\n"); | |
931 | break; | |
932 | } | |
933 | } | |
934 | fclose(file); | |
35efa5e9 WF |
935 | } |
936 | ||
65a6a410 KK |
937 | static void show_file(const char *name, const struct stat *st) |
938 | { | |
939 | unsigned long long size = st->st_size; | |
940 | char atime[64], mtime[64]; | |
941 | long now = time(NULL); | |
942 | ||
943 | printf("%s\tInode: %u\tSize: %llu (%llu pages)\n", | |
944 | name, (unsigned)st->st_ino, | |
945 | size, (size + page_size - 1) / page_size); | |
946 | ||
947 | strftime(atime, sizeof(atime), "%c", localtime(&st->st_atime)); | |
948 | strftime(mtime, sizeof(mtime), "%c", localtime(&st->st_mtime)); | |
949 | ||
950 | printf("Modify: %s (%ld seconds ago)\nAccess: %s (%ld seconds ago)\n", | |
951 | mtime, now - st->st_mtime, | |
952 | atime, now - st->st_atime); | |
953 | } | |
954 | ||
1d46598b KK |
955 | static sigjmp_buf sigbus_jmp; |
956 | ||
957 | static void * volatile sigbus_addr; | |
958 | ||
959 | static void sigbus_handler(int sig, siginfo_t *info, void *ucontex) | |
960 | { | |
961 | (void)sig; | |
962 | (void)ucontex; | |
963 | sigbus_addr = info ? info->si_addr : NULL; | |
964 | siglongjmp(sigbus_jmp, 1); | |
965 | } | |
966 | ||
967 | static struct sigaction sigbus_action = { | |
968 | .sa_sigaction = sigbus_handler, | |
969 | .sa_flags = SA_SIGINFO, | |
970 | }; | |
971 | ||
a62f5ecb NH |
972 | static void walk_file_range(const char *name, int fd, |
973 | unsigned long off, unsigned long end) | |
65a6a410 KK |
974 | { |
975 | uint8_t vec[PAGEMAP_BATCH]; | |
976 | uint64_t buf[PAGEMAP_BATCH], flags; | |
075db150 | 977 | uint64_t cgroup = 0; |
7f1d23e6 | 978 | uint64_t mapcnt = 0; |
65a6a410 | 979 | unsigned long nr_pages, pfn, i; |
65a6a410 KK |
980 | ssize_t len; |
981 | void *ptr; | |
982 | int first = 1; | |
983 | ||
a62f5ecb | 984 | for (; off < end; off += len) { |
1d46598b | 985 | nr_pages = (end - off + page_size - 1) / page_size; |
65a6a410 KK |
986 | if (nr_pages > PAGEMAP_BATCH) |
987 | nr_pages = PAGEMAP_BATCH; | |
988 | len = nr_pages * page_size; | |
989 | ||
990 | ptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, off); | |
991 | if (ptr == MAP_FAILED) | |
992 | fatal("mmap failed: %s", name); | |
993 | ||
994 | /* determine cached pages */ | |
995 | if (mincore(ptr, len, vec)) | |
996 | fatal("mincore failed: %s", name); | |
997 | ||
998 | /* turn off readahead */ | |
999 | if (madvise(ptr, len, MADV_RANDOM)) | |
1000 | fatal("madvice failed: %s", name); | |
1001 | ||
1d46598b KK |
1002 | if (sigsetjmp(sigbus_jmp, 1)) { |
1003 | end = off + sigbus_addr ? sigbus_addr - ptr : 0; | |
1004 | fprintf(stderr, "got sigbus at offset %lld: %s\n", | |
1005 | (long long)end, name); | |
1006 | goto got_sigbus; | |
1007 | } | |
1008 | ||
65a6a410 KK |
1009 | /* populate ptes */ |
1010 | for (i = 0; i < nr_pages ; i++) { | |
1011 | if (vec[i] & 1) | |
1012 | (void)*(volatile int *)(ptr + i * page_size); | |
1013 | } | |
1d46598b | 1014 | got_sigbus: |
65a6a410 KK |
1015 | |
1016 | /* turn off harvesting reference bits */ | |
1017 | if (madvise(ptr, len, MADV_SEQUENTIAL)) | |
1018 | fatal("madvice failed: %s", name); | |
1019 | ||
1020 | if (pagemap_read(buf, (unsigned long)ptr / page_size, | |
1021 | nr_pages) != nr_pages) | |
1022 | fatal("cannot read pagemap"); | |
1023 | ||
1024 | munmap(ptr, len); | |
1025 | ||
1026 | for (i = 0; i < nr_pages; i++) { | |
1027 | pfn = pagemap_pfn(buf[i]); | |
1028 | if (!pfn) | |
1029 | continue; | |
1030 | if (!kpageflags_read(&flags, pfn, 1)) | |
1031 | continue; | |
075db150 KK |
1032 | if (!kpagecgroup_read(&cgroup, pfn, 1)) |
1033 | fatal("kpagecgroup_read failed"); | |
7f1d23e6 CH |
1034 | if (!kpagecount_read(&mapcnt, pfn, 1)) |
1035 | fatal("kpagecount_read failed"); | |
65a6a410 KK |
1036 | if (first && opt_list) { |
1037 | first = 0; | |
1038 | flush_page_range(); | |
65a6a410 | 1039 | } |
075db150 | 1040 | add_page(off / page_size + i, pfn, |
7f1d23e6 | 1041 | flags, cgroup, mapcnt, buf[i]); |
65a6a410 KK |
1042 | } |
1043 | } | |
a62f5ecb NH |
1044 | } |
1045 | ||
1046 | static void walk_file(const char *name, const struct stat *st) | |
1047 | { | |
1048 | int i; | |
1049 | int fd; | |
1050 | ||
1051 | fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW); | |
1052 | ||
1053 | if (!nr_addr_ranges) | |
1054 | add_addr_range(0, st->st_size / page_size); | |
1055 | ||
1056 | for (i = 0; i < nr_addr_ranges; i++) | |
1057 | walk_file_range(name, fd, opt_offset[i] * page_size, | |
1058 | (opt_offset[i] + opt_size[i]) * page_size); | |
65a6a410 KK |
1059 | |
1060 | close(fd); | |
1061 | } | |
1062 | ||
1063 | int walk_tree(const char *name, const struct stat *st, int type, struct FTW *f) | |
1064 | { | |
1065 | (void)f; | |
1066 | switch (type) { | |
1067 | case FTW_F: | |
1068 | if (S_ISREG(st->st_mode)) | |
1069 | walk_file(name, st); | |
1070 | break; | |
1071 | case FTW_DNR: | |
1072 | fprintf(stderr, "cannot read dir: %s\n", name); | |
1073 | break; | |
1074 | } | |
1075 | return 0; | |
1076 | } | |
1077 | ||
b76901db NH |
1078 | struct stat st; |
1079 | ||
65a6a410 KK |
1080 | static void walk_page_cache(void) |
1081 | { | |
c7905f20 | 1082 | kpageflags_fd = checked_open(opt_kpageflags, O_RDONLY); |
65a6a410 | 1083 | pagemap_fd = checked_open("/proc/self/pagemap", O_RDONLY); |
1d46598b | 1084 | sigaction(SIGBUS, &sigbus_action, NULL); |
65a6a410 KK |
1085 | |
1086 | if (stat(opt_file, &st)) | |
1087 | fatal("stat failed: %s\n", opt_file); | |
1088 | ||
1089 | if (S_ISREG(st.st_mode)) { | |
1090 | walk_file(opt_file, &st); | |
1091 | } else if (S_ISDIR(st.st_mode)) { | |
1092 | /* do not follow symlinks and mountpoints */ | |
1093 | if (nftw(opt_file, walk_tree, 64, FTW_MOUNT | FTW_PHYS) < 0) | |
1094 | fatal("nftw failed: %s\n", opt_file); | |
1095 | } else | |
1096 | fatal("unhandled file type: %s\n", opt_file); | |
1097 | ||
1098 | close(kpageflags_fd); | |
1099 | close(pagemap_fd); | |
1d46598b | 1100 | signal(SIGBUS, SIG_DFL); |
65a6a410 KK |
1101 | } |
1102 | ||
0b4b2ad5 | 1103 | static void parse_file(const char *name) |
35efa5e9 | 1104 | { |
65a6a410 | 1105 | opt_file = name; |
35efa5e9 WF |
1106 | } |
1107 | ||
075db150 KK |
1108 | static void parse_cgroup(const char *path) |
1109 | { | |
1110 | if (path[0] == '@') { | |
1111 | opt_cgroup = parse_number(path + 1); | |
1112 | return; | |
1113 | } | |
1114 | ||
1115 | struct stat st; | |
1116 | ||
1117 | if (stat(path, &st)) | |
1118 | fatal("stat failed: %s: %m\n", path); | |
1119 | ||
1120 | if (!S_ISDIR(st.st_mode)) | |
1121 | fatal("cgroup supposed to be a directory: %s\n", path); | |
1122 | ||
1123 | opt_cgroup = st.st_ino; | |
1124 | } | |
1125 | ||
b7ed698c | 1126 | static void parse_addr_range(const char *optarg) |
35efa5e9 WF |
1127 | { |
1128 | unsigned long offset; | |
1129 | unsigned long size; | |
1130 | char *p; | |
1131 | ||
1132 | p = strchr(optarg, ','); | |
1133 | if (!p) | |
1134 | p = strchr(optarg, '+'); | |
1135 | ||
1136 | if (p == optarg) { | |
1137 | offset = 0; | |
1138 | size = parse_number(p + 1); | |
1139 | } else if (p) { | |
1140 | offset = parse_number(optarg); | |
1141 | if (p[1] == '\0') | |
1142 | size = ULONG_MAX; | |
1143 | else { | |
1144 | size = parse_number(p + 1); | |
1145 | if (*p == ',') { | |
1146 | if (size < offset) | |
1147 | fatal("invalid range: %lu,%lu\n", | |
1148 | offset, size); | |
1149 | size -= offset; | |
1150 | } | |
1151 | } | |
1152 | } else { | |
1153 | offset = parse_number(optarg); | |
1154 | size = 1; | |
1155 | } | |
1156 | ||
1157 | add_addr_range(offset, size); | |
1158 | } | |
1159 | ||
b7ed698c | 1160 | static void add_bits_filter(uint64_t mask, uint64_t bits) |
35efa5e9 WF |
1161 | { |
1162 | if (nr_bit_filters >= MAX_BIT_FILTERS) | |
1163 | fatal("too much bit filters\n"); | |
1164 | ||
1165 | opt_mask[nr_bit_filters] = mask; | |
1166 | opt_bits[nr_bit_filters] = bits; | |
1167 | nr_bit_filters++; | |
1168 | } | |
1169 | ||
b7ed698c | 1170 | static uint64_t parse_flag_name(const char *str, int len) |
35efa5e9 | 1171 | { |
e30d539b | 1172 | size_t i; |
35efa5e9 WF |
1173 | |
1174 | if (!*str || !len) | |
1175 | return 0; | |
1176 | ||
1177 | if (len <= 8 && !strncmp(str, "compound", len)) | |
1178 | return BITS_COMPOUND; | |
1179 | ||
1180 | for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) { | |
1181 | if (!page_flag_names[i]) | |
1182 | continue; | |
1183 | if (!strncmp(str, page_flag_names[i] + 2, len)) | |
1184 | return 1ULL << i; | |
1185 | } | |
1186 | ||
1187 | return parse_number(str); | |
1188 | } | |
1189 | ||
b7ed698c | 1190 | static uint64_t parse_flag_names(const char *str, int all) |
35efa5e9 WF |
1191 | { |
1192 | const char *p = str; | |
1193 | uint64_t flags = 0; | |
1194 | ||
1195 | while (1) { | |
1196 | if (*p == ',' || *p == '=' || *p == '\0') { | |
1197 | if ((*str != '~') || (*str == '~' && all && *++str)) | |
1198 | flags |= parse_flag_name(str, p - str); | |
1199 | if (*p != ',') | |
1200 | break; | |
1201 | str = p + 1; | |
1202 | } | |
1203 | p++; | |
1204 | } | |
1205 | ||
1206 | return flags; | |
1207 | } | |
1208 | ||
b7ed698c | 1209 | static void parse_bits_mask(const char *optarg) |
35efa5e9 WF |
1210 | { |
1211 | uint64_t mask; | |
1212 | uint64_t bits; | |
1213 | const char *p; | |
1214 | ||
1215 | p = strchr(optarg, '='); | |
1216 | if (p == optarg) { | |
1217 | mask = KPF_ALL_BITS; | |
1218 | bits = parse_flag_names(p + 1, 0); | |
1219 | } else if (p) { | |
1220 | mask = parse_flag_names(optarg, 0); | |
1221 | bits = parse_flag_names(p + 1, 0); | |
1222 | } else if (strchr(optarg, '~')) { | |
1223 | mask = parse_flag_names(optarg, 1); | |
1224 | bits = parse_flag_names(optarg, 0); | |
1225 | } else { | |
1226 | mask = parse_flag_names(optarg, 0); | |
1227 | bits = KPF_ALL_BITS; | |
1228 | } | |
1229 | ||
1230 | add_bits_filter(mask, bits); | |
1231 | } | |
1232 | ||
c7905f20 DR |
1233 | static void parse_kpageflags(const char *name) |
1234 | { | |
1235 | opt_kpageflags = name; | |
1236 | } | |
1237 | ||
dcfe730c AC |
1238 | static void describe_flags(const char *optarg) |
1239 | { | |
1240 | uint64_t flags = parse_flag_names(optarg, 0); | |
1241 | ||
1242 | printf("0x%016llx\t%s\t%s\n", | |
1243 | (unsigned long long)flags, | |
1244 | page_flag_name(flags), | |
1245 | page_flag_longname(flags)); | |
1246 | } | |
35efa5e9 | 1247 | |
3428838d | 1248 | static const struct option opts[] = { |
35efa5e9 WF |
1249 | { "raw" , 0, NULL, 'r' }, |
1250 | { "pid" , 1, NULL, 'p' }, | |
1251 | { "file" , 1, NULL, 'f' }, | |
1252 | { "addr" , 1, NULL, 'a' }, | |
1253 | { "bits" , 1, NULL, 'b' }, | |
075db150 | 1254 | { "cgroup" , 1, NULL, 'c' }, |
dcfe730c | 1255 | { "describe" , 1, NULL, 'd' }, |
59ae96ff | 1256 | { "mark-idle" , 0, NULL, 'i' }, |
35efa5e9 WF |
1257 | { "list" , 0, NULL, 'l' }, |
1258 | { "list-each" , 0, NULL, 'L' }, | |
075db150 | 1259 | { "list-cgroup", 0, NULL, 'C' }, |
7f1d23e6 | 1260 | { "list-mapcnt", 0, NULL, 'M' }, |
35efa5e9 | 1261 | { "no-summary", 0, NULL, 'N' }, |
a54fed9f WF |
1262 | { "hwpoison" , 0, NULL, 'X' }, |
1263 | { "unpoison" , 0, NULL, 'x' }, | |
c7905f20 | 1264 | { "kpageflags", 0, NULL, 'F' }, |
35efa5e9 WF |
1265 | { "help" , 0, NULL, 'h' }, |
1266 | { NULL , 0, NULL, 0 } | |
1267 | }; | |
1268 | ||
1269 | int main(int argc, char *argv[]) | |
1270 | { | |
1271 | int c; | |
1272 | ||
1273 | page_size = getpagesize(); | |
1274 | ||
1275 | while ((c = getopt_long(argc, argv, | |
59ae96ff | 1276 | "rp:f:a:b:d:c:CilLMNXxF:h", |
7f1d23e6 | 1277 | opts, NULL)) != -1) { |
35efa5e9 WF |
1278 | switch (c) { |
1279 | case 'r': | |
1280 | opt_raw = 1; | |
1281 | break; | |
1282 | case 'p': | |
1283 | parse_pid(optarg); | |
1284 | break; | |
1285 | case 'f': | |
1286 | parse_file(optarg); | |
1287 | break; | |
1288 | case 'a': | |
1289 | parse_addr_range(optarg); | |
1290 | break; | |
1291 | case 'b': | |
1292 | parse_bits_mask(optarg); | |
1293 | break; | |
075db150 KK |
1294 | case 'c': |
1295 | parse_cgroup(optarg); | |
1296 | break; | |
1297 | case 'C': | |
1298 | opt_list_cgroup = 1; | |
1299 | break; | |
dcfe730c | 1300 | case 'd': |
dcfe730c | 1301 | describe_flags(optarg); |
bb86a733 | 1302 | exit(0); |
59ae96ff CH |
1303 | case 'i': |
1304 | opt_mark_idle = 1; | |
1305 | break; | |
35efa5e9 WF |
1306 | case 'l': |
1307 | opt_list = 1; | |
1308 | break; | |
1309 | case 'L': | |
1310 | opt_list = 2; | |
1311 | break; | |
7f1d23e6 CH |
1312 | case 'M': |
1313 | opt_list_mapcnt = 1; | |
1314 | break; | |
35efa5e9 WF |
1315 | case 'N': |
1316 | opt_no_summary = 1; | |
1317 | break; | |
a54fed9f WF |
1318 | case 'X': |
1319 | opt_hwpoison = 1; | |
1320 | prepare_hwpoison_fd(); | |
1321 | break; | |
1322 | case 'x': | |
1323 | opt_unpoison = 1; | |
1324 | prepare_hwpoison_fd(); | |
1325 | break; | |
c7905f20 DR |
1326 | case 'F': |
1327 | parse_kpageflags(optarg); | |
1328 | break; | |
35efa5e9 WF |
1329 | case 'h': |
1330 | usage(); | |
1331 | exit(0); | |
1332 | default: | |
1333 | usage(); | |
1334 | exit(1); | |
1335 | } | |
1336 | } | |
1337 | ||
c7905f20 DR |
1338 | if (!opt_kpageflags) |
1339 | opt_kpageflags = PROC_KPAGEFLAGS; | |
1340 | ||
075db150 KK |
1341 | if (opt_cgroup || opt_list_cgroup) |
1342 | kpagecgroup_fd = checked_open(PROC_KPAGECGROUP, O_RDONLY); | |
1343 | ||
7f1d23e6 CH |
1344 | if (opt_list && opt_list_mapcnt) |
1345 | kpagecount_fd = checked_open(PROC_KPAGECOUNT, O_RDONLY); | |
1346 | ||
ebaeab2f | 1347 | if (opt_mark_idle) |
59ae96ff CH |
1348 | page_idle_fd = checked_open(SYS_KERNEL_MM_PAGE_IDLE, O_RDWR); |
1349 | ||
0b4b2ad5 WF |
1350 | if (opt_list && opt_pid) |
1351 | printf("voffset\t"); | |
65a6a410 KK |
1352 | if (opt_list && opt_file) |
1353 | printf("foffset\t"); | |
075db150 KK |
1354 | if (opt_list && opt_list_cgroup) |
1355 | printf("cgroup\t"); | |
7f1d23e6 CH |
1356 | if (opt_list && opt_list_mapcnt) |
1357 | printf("map-cnt\t"); | |
1358 | ||
35efa5e9 | 1359 | if (opt_list == 1) |
0b4b2ad5 | 1360 | printf("offset\tlen\tflags\n"); |
35efa5e9 WF |
1361 | if (opt_list == 2) |
1362 | printf("offset\tflags\n"); | |
1363 | ||
65a6a410 KK |
1364 | if (opt_file) |
1365 | walk_page_cache(); | |
1366 | else | |
1367 | walk_addr_ranges(); | |
35efa5e9 WF |
1368 | |
1369 | if (opt_list == 1) | |
65a6a410 | 1370 | flush_page_range(); |
35efa5e9 WF |
1371 | |
1372 | if (opt_no_summary) | |
1373 | return 0; | |
1374 | ||
1375 | if (opt_list) | |
1376 | printf("\n\n"); | |
1377 | ||
b76901db NH |
1378 | if (opt_file) { |
1379 | show_file(opt_file, &st); | |
1380 | printf("\n"); | |
1381 | } | |
1382 | ||
35efa5e9 WF |
1383 | show_summary(); |
1384 | ||
7f1d23e6 CH |
1385 | if (opt_list_mapcnt) |
1386 | close(kpagecount_fd); | |
1387 | ||
59ae96ff CH |
1388 | if (page_idle_fd >= 0) |
1389 | close(page_idle_fd); | |
1390 | ||
35efa5e9 WF |
1391 | return 0; |
1392 | } |