Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1 | /* |
| 2 | * page-types: Tool for querying page flags |
| 3 | * |
Wu Fengguang | 0e9052e | 2009-12-16 12:19:57 +0100 | [diff] [blame] | 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License as published by the Free |
| 6 | * Software Foundation; version 2. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should find a copy of v2 of the GNU General Public License somewhere on |
| 14 | * your Linux system; if not, write to the Free Software Foundation, Inc., 59 |
| 15 | * Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 16 | * |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 17 | * Copyright (C) 2009 Intel corporation |
Wu Fengguang | 0c57eff | 2009-10-07 16:32:28 -0700 | [diff] [blame] | 18 | * |
| 19 | * Authors: Wu Fengguang <fengguang.wu@intel.com> |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 20 | */ |
| 21 | |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 22 | #define _FILE_OFFSET_BITS 64 |
| 23 | #define _GNU_SOURCE |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <unistd.h> |
| 27 | #include <stdint.h> |
| 28 | #include <stdarg.h> |
| 29 | #include <string.h> |
| 30 | #include <getopt.h> |
| 31 | #include <limits.h> |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 32 | #include <assert.h> |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 33 | #include <ftw.h> |
| 34 | #include <time.h> |
Konstantin Khlebnikov | 1d46598 | 2014-06-04 16:05:30 -0700 | [diff] [blame] | 35 | #include <setjmp.h> |
| 36 | #include <signal.h> |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 37 | #include <sys/types.h> |
| 38 | #include <sys/errno.h> |
| 39 | #include <sys/fcntl.h> |
Chen Gong | 12da58b | 2011-03-22 16:35:03 -0700 | [diff] [blame] | 40 | #include <sys/mount.h> |
| 41 | #include <sys/statfs.h> |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 42 | #include <sys/mman.h> |
David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 43 | #include "../../include/uapi/linux/magic.h" |
David Howells | 59ce876 | 2012-10-25 13:37:57 -0700 | [diff] [blame] | 44 | #include "../../include/uapi/linux/kernel-page-flags.h" |
Arnaldo Carvalho de Melo | f6489bc | 2015-09-22 13:13:04 -0300 | [diff] [blame] | 45 | #include <api/fs/fs.h> |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 46 | |
Chen Gong | 12da58b | 2011-03-22 16:35:03 -0700 | [diff] [blame] | 47 | #ifndef MAX_PATH |
| 48 | # define MAX_PATH 256 |
| 49 | #endif |
| 50 | |
| 51 | #ifndef STR |
| 52 | # define _STR(x) #x |
| 53 | # define STR(x) _STR(x) |
| 54 | #endif |
| 55 | |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 56 | /* |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 57 | * pagemap kernel ABI bits |
| 58 | */ |
| 59 | |
Konstantin Khlebnikov | deb9454 | 2015-09-08 15:00:02 -0700 | [diff] [blame] | 60 | #define PM_ENTRY_BYTES 8 |
| 61 | #define PM_PFRAME_BITS 55 |
| 62 | #define PM_PFRAME_MASK ((1LL << PM_PFRAME_BITS) - 1) |
| 63 | #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK) |
Naoya Horiguchi | 0335ddd | 2016-03-17 14:17:47 -0700 | [diff] [blame] | 64 | #define MAX_SWAPFILES_SHIFT 5 |
| 65 | #define PM_SWAP_OFFSET(x) (((x) & PM_PFRAME_MASK) >> MAX_SWAPFILES_SHIFT) |
Konstantin Khlebnikov | deb9454 | 2015-09-08 15:00:02 -0700 | [diff] [blame] | 66 | #define PM_SOFT_DIRTY (1ULL << 55) |
Konstantin Khlebnikov | 77bb499 | 2015-09-08 15:00:10 -0700 | [diff] [blame] | 67 | #define PM_MMAP_EXCLUSIVE (1ULL << 56) |
Konstantin Khlebnikov | deb9454 | 2015-09-08 15:00:02 -0700 | [diff] [blame] | 68 | #define PM_FILE (1ULL << 61) |
| 69 | #define PM_SWAP (1ULL << 62) |
| 70 | #define PM_PRESENT (1ULL << 63) |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 71 | |
| 72 | /* |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 73 | * kernel page flags |
| 74 | */ |
| 75 | |
| 76 | #define KPF_BYTES 8 |
| 77 | #define PROC_KPAGEFLAGS "/proc/kpageflags" |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 78 | #define PROC_KPAGECGROUP "/proc/kpagecgroup" |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 79 | |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 80 | /* [32-] kernel hacking assistances */ |
| 81 | #define KPF_RESERVED 32 |
| 82 | #define KPF_MLOCKED 33 |
| 83 | #define KPF_MAPPEDTODISK 34 |
| 84 | #define KPF_PRIVATE 35 |
| 85 | #define KPF_PRIVATE_2 36 |
| 86 | #define KPF_OWNER_PRIVATE 37 |
| 87 | #define KPF_ARCH 38 |
| 88 | #define KPF_UNCACHED 39 |
Naoya Horiguchi | 46c77e2 | 2013-11-12 15:07:50 -0800 | [diff] [blame] | 89 | #define KPF_SOFTDIRTY 40 |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 90 | |
| 91 | /* [48-] take some arbitrary free slots for expanding overloaded flags |
| 92 | * not part of kernel API |
| 93 | */ |
| 94 | #define KPF_READAHEAD 48 |
| 95 | #define KPF_SLOB_FREE 49 |
| 96 | #define KPF_SLUB_FROZEN 50 |
| 97 | #define KPF_SLUB_DEBUG 51 |
Naoya Horiguchi | 0335ddd | 2016-03-17 14:17:47 -0700 | [diff] [blame] | 98 | #define KPF_FILE 61 |
| 99 | #define KPF_SWAP 62 |
Konstantin Khlebnikov | 77bb499 | 2015-09-08 15:00:10 -0700 | [diff] [blame] | 100 | #define KPF_MMAP_EXCLUSIVE 63 |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 101 | |
| 102 | #define KPF_ALL_BITS ((uint64_t)~0ULL) |
| 103 | #define KPF_HACKERS_BITS (0xffffULL << 32) |
| 104 | #define KPF_OVERLOADED_BITS (0xffffULL << 48) |
| 105 | #define BIT(name) (1ULL << KPF_##name) |
| 106 | #define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL)) |
| 107 | |
Dave Young | c6dd897 | 2012-03-28 14:42:55 -0700 | [diff] [blame] | 108 | static const char * const page_flag_names[] = { |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 109 | [KPF_LOCKED] = "L:locked", |
| 110 | [KPF_ERROR] = "E:error", |
| 111 | [KPF_REFERENCED] = "R:referenced", |
| 112 | [KPF_UPTODATE] = "U:uptodate", |
| 113 | [KPF_DIRTY] = "D:dirty", |
| 114 | [KPF_LRU] = "l:lru", |
| 115 | [KPF_ACTIVE] = "A:active", |
| 116 | [KPF_SLAB] = "S:slab", |
| 117 | [KPF_WRITEBACK] = "W:writeback", |
| 118 | [KPF_RECLAIM] = "I:reclaim", |
| 119 | [KPF_BUDDY] = "B:buddy", |
| 120 | |
| 121 | [KPF_MMAP] = "M:mmap", |
| 122 | [KPF_ANON] = "a:anonymous", |
| 123 | [KPF_SWAPCACHE] = "s:swapcache", |
| 124 | [KPF_SWAPBACKED] = "b:swapbacked", |
| 125 | [KPF_COMPOUND_HEAD] = "H:compound_head", |
| 126 | [KPF_COMPOUND_TAIL] = "T:compound_tail", |
| 127 | [KPF_HUGE] = "G:huge", |
| 128 | [KPF_UNEVICTABLE] = "u:unevictable", |
Wu Fengguang | 253fb02 | 2009-10-07 16:32:27 -0700 | [diff] [blame] | 129 | [KPF_HWPOISON] = "X:hwpoison", |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 130 | [KPF_NOPAGE] = "n:nopage", |
Wu Fengguang | a1bbb5e | 2009-10-07 16:32:28 -0700 | [diff] [blame] | 131 | [KPF_KSM] = "x:ksm", |
Naoya Horiguchi | 807f0cc | 2012-03-21 16:33:58 -0700 | [diff] [blame] | 132 | [KPF_THP] = "t:thp", |
Konstantin Khlebnikov | 09316c0 | 2014-10-09 15:29:32 -0700 | [diff] [blame] | 133 | [KPF_BALLOON] = "o:balloon", |
Wang, Yalin | 56873f4 | 2015-02-11 15:24:51 -0800 | [diff] [blame] | 134 | [KPF_ZERO_PAGE] = "z:zero_page", |
Naoya Horiguchi | 429d486 | 2015-11-20 15:56:59 -0800 | [diff] [blame] | 135 | [KPF_IDLE] = "i:idle_page", |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 136 | |
| 137 | [KPF_RESERVED] = "r:reserved", |
| 138 | [KPF_MLOCKED] = "m:mlocked", |
| 139 | [KPF_MAPPEDTODISK] = "d:mappedtodisk", |
| 140 | [KPF_PRIVATE] = "P:private", |
| 141 | [KPF_PRIVATE_2] = "p:private_2", |
| 142 | [KPF_OWNER_PRIVATE] = "O:owner_private", |
| 143 | [KPF_ARCH] = "h:arch", |
| 144 | [KPF_UNCACHED] = "c:uncached", |
Naoya Horiguchi | 46c77e2 | 2013-11-12 15:07:50 -0800 | [diff] [blame] | 145 | [KPF_SOFTDIRTY] = "f:softdirty", |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 146 | |
| 147 | [KPF_READAHEAD] = "I:readahead", |
| 148 | [KPF_SLOB_FREE] = "P:slob_free", |
| 149 | [KPF_SLUB_FROZEN] = "A:slub_frozen", |
| 150 | [KPF_SLUB_DEBUG] = "E:slub_debug", |
Konstantin Khlebnikov | 77bb499 | 2015-09-08 15:00:10 -0700 | [diff] [blame] | 151 | |
| 152 | [KPF_FILE] = "F:file", |
Naoya Horiguchi | 0335ddd | 2016-03-17 14:17:47 -0700 | [diff] [blame] | 153 | [KPF_SWAP] = "w:swap", |
Konstantin Khlebnikov | 77bb499 | 2015-09-08 15:00:10 -0700 | [diff] [blame] | 154 | [KPF_MMAP_EXCLUSIVE] = "1:mmap_exclusive", |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 155 | }; |
| 156 | |
| 157 | |
Dave Young | c6dd897 | 2012-03-28 14:42:55 -0700 | [diff] [blame] | 158 | static const char * const debugfs_known_mountpoints[] = { |
Chen Gong | 12da58b | 2011-03-22 16:35:03 -0700 | [diff] [blame] | 159 | "/sys/kernel/debug", |
| 160 | "/debug", |
| 161 | 0, |
| 162 | }; |
| 163 | |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 164 | /* |
| 165 | * data structures |
| 166 | */ |
| 167 | |
| 168 | static int opt_raw; /* for kernel developers */ |
| 169 | static int opt_list; /* list pages (in ranges) */ |
| 170 | static int opt_no_summary; /* don't show summary */ |
| 171 | static pid_t opt_pid; /* process to walk */ |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 172 | const char * opt_file; /* file or directory path */ |
| 173 | static uint64_t opt_cgroup; /* cgroup inode */ |
| 174 | static int opt_list_cgroup;/* list page cgroup */ |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 175 | |
| 176 | #define MAX_ADDR_RANGES 1024 |
| 177 | static int nr_addr_ranges; |
| 178 | static unsigned long opt_offset[MAX_ADDR_RANGES]; |
| 179 | static unsigned long opt_size[MAX_ADDR_RANGES]; |
| 180 | |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 181 | #define MAX_VMAS 10240 |
| 182 | static int nr_vmas; |
| 183 | static unsigned long pg_start[MAX_VMAS]; |
| 184 | static unsigned long pg_end[MAX_VMAS]; |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 185 | |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 186 | #define MAX_BIT_FILTERS 64 |
| 187 | static int nr_bit_filters; |
| 188 | static uint64_t opt_mask[MAX_BIT_FILTERS]; |
| 189 | static uint64_t opt_bits[MAX_BIT_FILTERS]; |
| 190 | |
| 191 | static int page_size; |
| 192 | |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 193 | static int pagemap_fd; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 194 | static int kpageflags_fd; |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 195 | static int kpagecgroup_fd = -1; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 196 | |
Wu Fengguang | a54fed9 | 2009-10-07 16:32:32 -0700 | [diff] [blame] | 197 | static int opt_hwpoison; |
| 198 | static int opt_unpoison; |
| 199 | |
Arnaldo Carvalho de Melo | f6489bc | 2015-09-22 13:13:04 -0300 | [diff] [blame] | 200 | static const char *hwpoison_debug_fs; |
Wu Fengguang | a54fed9 | 2009-10-07 16:32:32 -0700 | [diff] [blame] | 201 | static int hwpoison_inject_fd; |
| 202 | static int hwpoison_forget_fd; |
| 203 | |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 204 | #define HASH_SHIFT 13 |
| 205 | #define HASH_SIZE (1 << HASH_SHIFT) |
| 206 | #define HASH_MASK (HASH_SIZE - 1) |
| 207 | #define HASH_KEY(flags) (flags & HASH_MASK) |
| 208 | |
| 209 | static unsigned long total_pages; |
| 210 | static unsigned long nr_pages[HASH_SIZE]; |
Dave Young | c6dd897 | 2012-03-28 14:42:55 -0700 | [diff] [blame] | 211 | static uint64_t page_flags[HASH_SIZE]; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 212 | |
| 213 | |
| 214 | /* |
| 215 | * helper functions |
| 216 | */ |
| 217 | |
| 218 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) |
| 219 | |
| 220 | #define min_t(type, x, y) ({ \ |
| 221 | type __min1 = (x); \ |
| 222 | type __min2 = (y); \ |
| 223 | __min1 < __min2 ? __min1 : __min2; }) |
| 224 | |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 225 | #define max_t(type, x, y) ({ \ |
| 226 | type __max1 = (x); \ |
| 227 | type __max2 = (y); \ |
| 228 | __max1 > __max2 ? __max1 : __max2; }) |
| 229 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 230 | static unsigned long pages2mb(unsigned long pages) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 231 | { |
| 232 | return (pages * page_size) >> 20; |
| 233 | } |
| 234 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 235 | static void fatal(const char *x, ...) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 236 | { |
| 237 | va_list ap; |
| 238 | |
| 239 | va_start(ap, x); |
| 240 | vfprintf(stderr, x, ap); |
| 241 | va_end(ap); |
| 242 | exit(EXIT_FAILURE); |
| 243 | } |
| 244 | |
Josh Triplett | 1b98c00 | 2009-10-16 14:06:13 -0700 | [diff] [blame] | 245 | static int checked_open(const char *pathname, int flags) |
Wu Fengguang | 31bbf66 | 2009-10-07 16:32:29 -0700 | [diff] [blame] | 246 | { |
| 247 | int fd = open(pathname, flags); |
| 248 | |
| 249 | if (fd < 0) { |
| 250 | perror(pathname); |
| 251 | exit(EXIT_FAILURE); |
| 252 | } |
| 253 | |
| 254 | return fd; |
| 255 | } |
| 256 | |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 257 | /* |
| 258 | * pagemap/kpageflags routines |
| 259 | */ |
| 260 | |
| 261 | static unsigned long do_u64_read(int fd, char *name, |
| 262 | uint64_t *buf, |
| 263 | unsigned long index, |
| 264 | unsigned long count) |
| 265 | { |
| 266 | long bytes; |
| 267 | |
| 268 | if (index > ULONG_MAX / 8) |
| 269 | fatal("index overflow: %lu\n", index); |
| 270 | |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 271 | bytes = pread(fd, buf, count * 8, (off_t)index * 8); |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 272 | if (bytes < 0) { |
| 273 | perror(name); |
| 274 | exit(EXIT_FAILURE); |
| 275 | } |
| 276 | if (bytes % 8) |
| 277 | fatal("partial read: %lu bytes\n", bytes); |
| 278 | |
| 279 | return bytes / 8; |
| 280 | } |
| 281 | |
| 282 | static unsigned long kpageflags_read(uint64_t *buf, |
| 283 | unsigned long index, |
| 284 | unsigned long pages) |
| 285 | { |
| 286 | return do_u64_read(kpageflags_fd, PROC_KPAGEFLAGS, buf, index, pages); |
| 287 | } |
| 288 | |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 289 | static unsigned long kpagecgroup_read(uint64_t *buf, |
| 290 | unsigned long index, |
| 291 | unsigned long pages) |
| 292 | { |
| 293 | if (kpagecgroup_fd < 0) |
| 294 | return pages; |
| 295 | |
| 296 | return do_u64_read(kpagecgroup_fd, PROC_KPAGEFLAGS, buf, index, pages); |
| 297 | } |
| 298 | |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 299 | static unsigned long pagemap_read(uint64_t *buf, |
| 300 | unsigned long index, |
| 301 | unsigned long pages) |
| 302 | { |
| 303 | return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages); |
| 304 | } |
| 305 | |
| 306 | static unsigned long pagemap_pfn(uint64_t val) |
| 307 | { |
| 308 | unsigned long pfn; |
| 309 | |
| 310 | if (val & PM_PRESENT) |
| 311 | pfn = PM_PFRAME(val); |
| 312 | else |
| 313 | pfn = 0; |
| 314 | |
| 315 | return pfn; |
| 316 | } |
| 317 | |
Naoya Horiguchi | 0335ddd | 2016-03-17 14:17:47 -0700 | [diff] [blame] | 318 | static unsigned long pagemap_swap_offset(uint64_t val) |
| 319 | { |
| 320 | return val & PM_SWAP ? PM_SWAP_OFFSET(val) : 0; |
| 321 | } |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 322 | |
| 323 | /* |
| 324 | * page flag names |
| 325 | */ |
| 326 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 327 | static char *page_flag_name(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 328 | { |
| 329 | static char buf[65]; |
| 330 | int present; |
Ulrich Drepper | e30d539 | 2012-05-29 15:06:30 -0700 | [diff] [blame] | 331 | size_t i, j; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 332 | |
| 333 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { |
| 334 | present = (flags >> i) & 1; |
| 335 | if (!page_flag_names[i]) { |
| 336 | if (present) |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 337 | fatal("unknown flag bit %d\n", i); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 338 | continue; |
| 339 | } |
| 340 | buf[j++] = present ? page_flag_names[i][0] : '_'; |
| 341 | } |
| 342 | |
| 343 | return buf; |
| 344 | } |
| 345 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 346 | static char *page_flag_longname(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 347 | { |
| 348 | static char buf[1024]; |
Ulrich Drepper | e30d539 | 2012-05-29 15:06:30 -0700 | [diff] [blame] | 349 | size_t i, n; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 350 | |
| 351 | for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) { |
| 352 | if (!page_flag_names[i]) |
| 353 | continue; |
| 354 | if ((flags >> i) & 1) |
| 355 | n += snprintf(buf + n, sizeof(buf) - n, "%s,", |
| 356 | page_flag_names[i] + 2); |
| 357 | } |
| 358 | if (n) |
| 359 | n--; |
| 360 | buf[n] = '\0'; |
| 361 | |
| 362 | return buf; |
| 363 | } |
| 364 | |
| 365 | |
| 366 | /* |
| 367 | * page list and summary |
| 368 | */ |
| 369 | |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 370 | static void show_page_range(unsigned long voffset, unsigned long offset, |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 371 | unsigned long size, uint64_t flags, uint64_t cgroup) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 372 | { |
| 373 | static uint64_t flags0; |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 374 | static uint64_t cgroup0; |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 375 | static unsigned long voff; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 376 | static unsigned long index; |
| 377 | static unsigned long count; |
| 378 | |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 379 | if (flags == flags0 && cgroup == cgroup0 && offset == index + count && |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 380 | size && voffset == voff + count) { |
| 381 | count += size; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 382 | return; |
| 383 | } |
| 384 | |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 385 | if (count) { |
| 386 | if (opt_pid) |
| 387 | printf("%lx\t", voff); |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 388 | if (opt_file) |
| 389 | printf("%lu\t", voff); |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 390 | if (opt_list_cgroup) |
| 391 | printf("@%llu\t", (unsigned long long)cgroup0); |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 392 | printf("%lx\t%lx\t%s\n", |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 393 | index, count, page_flag_name(flags0)); |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 394 | } |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 395 | |
| 396 | flags0 = flags; |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 397 | cgroup0= cgroup; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 398 | index = offset; |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 399 | voff = voffset; |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 400 | count = size; |
| 401 | } |
| 402 | |
| 403 | static void flush_page_range(void) |
| 404 | { |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 405 | show_page_range(0, 0, 0, 0, 0); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 406 | } |
| 407 | |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 408 | static void show_page(unsigned long voffset, unsigned long offset, |
| 409 | uint64_t flags, uint64_t cgroup) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 410 | { |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 411 | if (opt_pid) |
| 412 | printf("%lx\t", voffset); |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 413 | if (opt_file) |
| 414 | printf("%lu\t", voffset); |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 415 | if (opt_list_cgroup) |
| 416 | printf("@%llu\t", (unsigned long long)cgroup); |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 417 | printf("%lx\t%s\n", offset, page_flag_name(flags)); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 418 | } |
| 419 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 420 | static void show_summary(void) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 421 | { |
Ulrich Drepper | e30d539 | 2012-05-29 15:06:30 -0700 | [diff] [blame] | 422 | size_t i; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 423 | |
| 424 | printf(" flags\tpage-count MB" |
| 425 | " symbolic-flags\t\t\tlong-symbolic-flags\n"); |
| 426 | |
| 427 | for (i = 0; i < ARRAY_SIZE(nr_pages); i++) { |
| 428 | if (nr_pages[i]) |
| 429 | printf("0x%016llx\t%10lu %8lu %s\t%s\n", |
| 430 | (unsigned long long)page_flags[i], |
| 431 | nr_pages[i], |
| 432 | pages2mb(nr_pages[i]), |
| 433 | page_flag_name(page_flags[i]), |
| 434 | page_flag_longname(page_flags[i])); |
| 435 | } |
| 436 | |
| 437 | printf(" total\t%10lu %8lu\n", |
| 438 | total_pages, pages2mb(total_pages)); |
| 439 | } |
| 440 | |
| 441 | |
| 442 | /* |
| 443 | * page flag filters |
| 444 | */ |
| 445 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 446 | static int bit_mask_ok(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 447 | { |
| 448 | int i; |
| 449 | |
| 450 | for (i = 0; i < nr_bit_filters; i++) { |
| 451 | if (opt_bits[i] == KPF_ALL_BITS) { |
| 452 | if ((flags & opt_mask[i]) == 0) |
| 453 | return 0; |
| 454 | } else { |
| 455 | if ((flags & opt_mask[i]) != opt_bits[i]) |
| 456 | return 0; |
| 457 | } |
| 458 | } |
| 459 | |
| 460 | return 1; |
| 461 | } |
| 462 | |
Naoya Horiguchi | 46c77e2 | 2013-11-12 15:07:50 -0800 | [diff] [blame] | 463 | static uint64_t expand_overloaded_flags(uint64_t flags, uint64_t pme) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 464 | { |
| 465 | /* SLOB/SLUB overload several page flags */ |
| 466 | if (flags & BIT(SLAB)) { |
| 467 | if (flags & BIT(PRIVATE)) |
| 468 | flags ^= BIT(PRIVATE) | BIT(SLOB_FREE); |
| 469 | if (flags & BIT(ACTIVE)) |
| 470 | flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN); |
| 471 | if (flags & BIT(ERROR)) |
| 472 | flags ^= BIT(ERROR) | BIT(SLUB_DEBUG); |
| 473 | } |
| 474 | |
| 475 | /* PG_reclaim is overloaded as PG_readahead in the read path */ |
| 476 | if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM)) |
| 477 | flags ^= BIT(RECLAIM) | BIT(READAHEAD); |
| 478 | |
Naoya Horiguchi | 46c77e2 | 2013-11-12 15:07:50 -0800 | [diff] [blame] | 479 | if (pme & PM_SOFT_DIRTY) |
| 480 | flags |= BIT(SOFTDIRTY); |
Konstantin Khlebnikov | 77bb499 | 2015-09-08 15:00:10 -0700 | [diff] [blame] | 481 | if (pme & PM_FILE) |
| 482 | flags |= BIT(FILE); |
Naoya Horiguchi | 0335ddd | 2016-03-17 14:17:47 -0700 | [diff] [blame] | 483 | if (pme & PM_SWAP) |
| 484 | flags |= BIT(SWAP); |
Konstantin Khlebnikov | 77bb499 | 2015-09-08 15:00:10 -0700 | [diff] [blame] | 485 | if (pme & PM_MMAP_EXCLUSIVE) |
| 486 | flags |= BIT(MMAP_EXCLUSIVE); |
Naoya Horiguchi | 46c77e2 | 2013-11-12 15:07:50 -0800 | [diff] [blame] | 487 | |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 488 | return flags; |
| 489 | } |
| 490 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 491 | static uint64_t well_known_flags(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 492 | { |
| 493 | /* hide flags intended only for kernel hacker */ |
| 494 | flags &= ~KPF_HACKERS_BITS; |
| 495 | |
| 496 | /* hide non-hugeTLB compound pages */ |
| 497 | if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE))) |
| 498 | flags &= ~BITS_COMPOUND; |
| 499 | |
| 500 | return flags; |
| 501 | } |
| 502 | |
Naoya Horiguchi | 46c77e2 | 2013-11-12 15:07:50 -0800 | [diff] [blame] | 503 | static uint64_t kpageflags_flags(uint64_t flags, uint64_t pme) |
Wu Fengguang | 48640d6 | 2009-10-07 16:32:31 -0700 | [diff] [blame] | 504 | { |
Naoya Horiguchi | 46c77e2 | 2013-11-12 15:07:50 -0800 | [diff] [blame] | 505 | if (opt_raw) |
| 506 | flags = expand_overloaded_flags(flags, pme); |
| 507 | else |
Wu Fengguang | 48640d6 | 2009-10-07 16:32:31 -0700 | [diff] [blame] | 508 | flags = well_known_flags(flags); |
| 509 | |
| 510 | return flags; |
| 511 | } |
| 512 | |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 513 | /* |
Wu Fengguang | a54fed9 | 2009-10-07 16:32:32 -0700 | [diff] [blame] | 514 | * page actions |
| 515 | */ |
| 516 | |
| 517 | static void prepare_hwpoison_fd(void) |
| 518 | { |
Chen Gong | 12da58b | 2011-03-22 16:35:03 -0700 | [diff] [blame] | 519 | char buf[MAX_PATH + 1]; |
| 520 | |
Arnaldo Carvalho de Melo | f6489bc | 2015-09-22 13:13:04 -0300 | [diff] [blame] | 521 | hwpoison_debug_fs = debugfs__mount(); |
Borislav Petkov | 5a43964 | 2013-02-20 16:32:33 +0100 | [diff] [blame] | 522 | if (!hwpoison_debug_fs) { |
| 523 | perror("mount debugfs"); |
| 524 | exit(EXIT_FAILURE); |
| 525 | } |
Wu Fengguang | a54fed9 | 2009-10-07 16:32:32 -0700 | [diff] [blame] | 526 | |
| 527 | if (opt_hwpoison && !hwpoison_inject_fd) { |
Chen Gong | 12da58b | 2011-03-22 16:35:03 -0700 | [diff] [blame] | 528 | snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn", |
| 529 | hwpoison_debug_fs); |
Wu Fengguang | a54fed9 | 2009-10-07 16:32:32 -0700 | [diff] [blame] | 530 | hwpoison_inject_fd = checked_open(buf, O_WRONLY); |
| 531 | } |
| 532 | |
| 533 | if (opt_unpoison && !hwpoison_forget_fd) { |
Chen Gong | 12da58b | 2011-03-22 16:35:03 -0700 | [diff] [blame] | 534 | snprintf(buf, MAX_PATH, "%s/hwpoison/unpoison-pfn", |
| 535 | hwpoison_debug_fs); |
Wu Fengguang | a54fed9 | 2009-10-07 16:32:32 -0700 | [diff] [blame] | 536 | hwpoison_forget_fd = checked_open(buf, O_WRONLY); |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | static int hwpoison_page(unsigned long offset) |
| 541 | { |
| 542 | char buf[100]; |
| 543 | int len; |
| 544 | |
| 545 | len = sprintf(buf, "0x%lx\n", offset); |
| 546 | len = write(hwpoison_inject_fd, buf, len); |
| 547 | if (len < 0) { |
| 548 | perror("hwpoison inject"); |
| 549 | return len; |
| 550 | } |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | static int unpoison_page(unsigned long offset) |
| 555 | { |
| 556 | char buf[100]; |
| 557 | int len; |
| 558 | |
| 559 | len = sprintf(buf, "0x%lx\n", offset); |
| 560 | len = write(hwpoison_forget_fd, buf, len); |
| 561 | if (len < 0) { |
| 562 | perror("hwpoison forget"); |
| 563 | return len; |
| 564 | } |
| 565 | return 0; |
| 566 | } |
| 567 | |
| 568 | /* |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 569 | * page frame walker |
| 570 | */ |
| 571 | |
Ulrich Drepper | e30d539 | 2012-05-29 15:06:30 -0700 | [diff] [blame] | 572 | static size_t hash_slot(uint64_t flags) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 573 | { |
Ulrich Drepper | e30d539 | 2012-05-29 15:06:30 -0700 | [diff] [blame] | 574 | size_t k = HASH_KEY(flags); |
| 575 | size_t i; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 576 | |
| 577 | /* Explicitly reserve slot 0 for flags 0: the following logic |
| 578 | * cannot distinguish an unoccupied slot from slot (flags==0). |
| 579 | */ |
| 580 | if (flags == 0) |
| 581 | return 0; |
| 582 | |
| 583 | /* search through the remaining (HASH_SIZE-1) slots */ |
| 584 | for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) { |
| 585 | if (!k || k >= ARRAY_SIZE(page_flags)) |
| 586 | k = 1; |
| 587 | if (page_flags[k] == 0) { |
| 588 | page_flags[k] = flags; |
| 589 | return k; |
| 590 | } |
| 591 | if (page_flags[k] == flags) |
| 592 | return k; |
| 593 | } |
| 594 | |
| 595 | fatal("hash table full: bump up HASH_SHIFT?\n"); |
| 596 | exit(EXIT_FAILURE); |
| 597 | } |
| 598 | |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 599 | static void add_page(unsigned long voffset, unsigned long offset, |
| 600 | uint64_t flags, uint64_t cgroup, uint64_t pme) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 601 | { |
Naoya Horiguchi | 46c77e2 | 2013-11-12 15:07:50 -0800 | [diff] [blame] | 602 | flags = kpageflags_flags(flags, pme); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 603 | |
| 604 | if (!bit_mask_ok(flags)) |
| 605 | return; |
| 606 | |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 607 | if (opt_cgroup && cgroup != (uint64_t)opt_cgroup) |
| 608 | return; |
| 609 | |
Wu Fengguang | a54fed9 | 2009-10-07 16:32:32 -0700 | [diff] [blame] | 610 | if (opt_hwpoison) |
| 611 | hwpoison_page(offset); |
| 612 | if (opt_unpoison) |
| 613 | unpoison_page(offset); |
| 614 | |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 615 | if (opt_list == 1) |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 616 | show_page_range(voffset, offset, 1, flags, cgroup); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 617 | else if (opt_list == 2) |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 618 | show_page(voffset, offset, flags, cgroup); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 619 | |
| 620 | nr_pages[hash_slot(flags)]++; |
| 621 | total_pages++; |
| 622 | } |
| 623 | |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 624 | #define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */ |
Wu Fengguang | e577ebd | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 625 | static void walk_pfn(unsigned long voffset, |
| 626 | unsigned long index, |
Naoya Horiguchi | 46c77e2 | 2013-11-12 15:07:50 -0800 | [diff] [blame] | 627 | unsigned long count, |
| 628 | uint64_t pme) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 629 | { |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 630 | uint64_t buf[KPAGEFLAGS_BATCH]; |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 631 | uint64_t cgi[KPAGEFLAGS_BATCH]; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 632 | unsigned long batch; |
Ulrich Drepper | e30d539 | 2012-05-29 15:06:30 -0700 | [diff] [blame] | 633 | unsigned long pages; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 634 | unsigned long i; |
| 635 | |
Naoya Horiguchi | d9b2ddf | 2016-03-17 14:20:22 -0700 | [diff] [blame] | 636 | /* |
| 637 | * kpagecgroup_read() reads only if kpagecgroup were opened, but |
| 638 | * /proc/kpagecgroup might even not exist, so it's better to fill |
| 639 | * them with zeros here. |
| 640 | */ |
| 641 | if (count == 1) |
| 642 | cgi[0] = 0; |
| 643 | else |
| 644 | memset(cgi, 0, sizeof cgi); |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 645 | |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 646 | while (count) { |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 647 | batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH); |
| 648 | pages = kpageflags_read(buf, index, batch); |
| 649 | if (pages == 0) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 650 | break; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 651 | |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 652 | if (kpagecgroup_read(cgi, index, pages) != pages) |
| 653 | fatal("kpagecgroup returned fewer pages than expected"); |
| 654 | |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 655 | for (i = 0; i < pages; i++) |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 656 | add_page(voffset + i, index + i, buf[i], cgi[i], pme); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 657 | |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 658 | index += pages; |
| 659 | count -= pages; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 660 | } |
| 661 | } |
| 662 | |
Naoya Horiguchi | 0335ddd | 2016-03-17 14:17:47 -0700 | [diff] [blame] | 663 | static void walk_swap(unsigned long voffset, uint64_t pme) |
| 664 | { |
| 665 | uint64_t flags = kpageflags_flags(0, pme); |
| 666 | |
| 667 | if (!bit_mask_ok(flags)) |
| 668 | return; |
| 669 | |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 670 | if (opt_cgroup) |
| 671 | return; |
| 672 | |
Naoya Horiguchi | 0335ddd | 2016-03-17 14:17:47 -0700 | [diff] [blame] | 673 | if (opt_list == 1) |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 674 | show_page_range(voffset, pagemap_swap_offset(pme), 1, flags, 0); |
Naoya Horiguchi | 0335ddd | 2016-03-17 14:17:47 -0700 | [diff] [blame] | 675 | else if (opt_list == 2) |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 676 | show_page(voffset, pagemap_swap_offset(pme), flags, 0); |
Naoya Horiguchi | 0335ddd | 2016-03-17 14:17:47 -0700 | [diff] [blame] | 677 | |
| 678 | nr_pages[hash_slot(flags)]++; |
| 679 | total_pages++; |
| 680 | } |
| 681 | |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 682 | #define PAGEMAP_BATCH (64 << 10) |
| 683 | static void walk_vma(unsigned long index, unsigned long count) |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 684 | { |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 685 | uint64_t buf[PAGEMAP_BATCH]; |
| 686 | unsigned long batch; |
| 687 | unsigned long pages; |
| 688 | unsigned long pfn; |
| 689 | unsigned long i; |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 690 | |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 691 | while (count) { |
| 692 | batch = min_t(unsigned long, count, PAGEMAP_BATCH); |
| 693 | pages = pagemap_read(buf, index, batch); |
| 694 | if (pages == 0) |
| 695 | break; |
| 696 | |
| 697 | for (i = 0; i < pages; i++) { |
| 698 | pfn = pagemap_pfn(buf[i]); |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 699 | if (pfn) |
Naoya Horiguchi | 46c77e2 | 2013-11-12 15:07:50 -0800 | [diff] [blame] | 700 | walk_pfn(index + i, pfn, 1, buf[i]); |
Naoya Horiguchi | 0335ddd | 2016-03-17 14:17:47 -0700 | [diff] [blame] | 701 | if (buf[i] & PM_SWAP) |
| 702 | walk_swap(index + i, buf[i]); |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 703 | } |
Wu Fengguang | 4a1b672 | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 704 | |
| 705 | index += pages; |
| 706 | count -= pages; |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 707 | } |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 708 | } |
| 709 | |
| 710 | static void walk_task(unsigned long index, unsigned long count) |
| 711 | { |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 712 | const unsigned long end = index + count; |
Wu Fengguang | e577ebd | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 713 | unsigned long start; |
| 714 | int i = 0; |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 715 | |
| 716 | while (index < end) { |
| 717 | |
| 718 | while (pg_end[i] <= index) |
| 719 | if (++i >= nr_vmas) |
| 720 | return; |
| 721 | if (pg_start[i] >= end) |
| 722 | return; |
| 723 | |
Wu Fengguang | e577ebd | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 724 | start = max_t(unsigned long, pg_start[i], index); |
| 725 | index = min_t(unsigned long, pg_end[i], end); |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 726 | |
Wu Fengguang | e577ebd | 2009-10-07 16:32:30 -0700 | [diff] [blame] | 727 | assert(start < index); |
| 728 | walk_vma(start, index - start); |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 729 | } |
| 730 | } |
| 731 | |
| 732 | static void add_addr_range(unsigned long offset, unsigned long size) |
| 733 | { |
| 734 | if (nr_addr_ranges >= MAX_ADDR_RANGES) |
| 735 | fatal("too many addr ranges\n"); |
| 736 | |
| 737 | opt_offset[nr_addr_ranges] = offset; |
| 738 | opt_size[nr_addr_ranges] = min_t(unsigned long, size, ULONG_MAX-offset); |
| 739 | nr_addr_ranges++; |
| 740 | } |
| 741 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 742 | static void walk_addr_ranges(void) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 743 | { |
| 744 | int i; |
| 745 | |
Wu Fengguang | 31bbf66 | 2009-10-07 16:32:29 -0700 | [diff] [blame] | 746 | kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 747 | |
| 748 | if (!nr_addr_ranges) |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 749 | add_addr_range(0, ULONG_MAX); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 750 | |
| 751 | for (i = 0; i < nr_addr_ranges; i++) |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 752 | if (!opt_pid) |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 753 | walk_pfn(opt_offset[i], opt_offset[i], opt_size[i], 0); |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 754 | else |
| 755 | walk_task(opt_offset[i], opt_size[i]); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 756 | |
| 757 | close(kpageflags_fd); |
| 758 | } |
| 759 | |
| 760 | |
| 761 | /* |
| 762 | * user interface |
| 763 | */ |
| 764 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 765 | static const char *page_flag_type(uint64_t flag) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 766 | { |
| 767 | if (flag & KPF_HACKERS_BITS) |
| 768 | return "(r)"; |
| 769 | if (flag & KPF_OVERLOADED_BITS) |
| 770 | return "(o)"; |
| 771 | return " "; |
| 772 | } |
| 773 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 774 | static void usage(void) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 775 | { |
Ulrich Drepper | e30d539 | 2012-05-29 15:06:30 -0700 | [diff] [blame] | 776 | size_t i, j; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 777 | |
| 778 | printf( |
| 779 | "page-types [options]\n" |
Alex Chiang | 9fdcd88 | 2009-12-14 17:57:53 -0800 | [diff] [blame] | 780 | " -r|--raw Raw mode, for kernel developers\n" |
Alex Chiang | dcfe730 | 2009-12-14 17:57:52 -0800 | [diff] [blame] | 781 | " -d|--describe flags Describe flags\n" |
Alex Chiang | 9fdcd88 | 2009-12-14 17:57:53 -0800 | [diff] [blame] | 782 | " -a|--addr addr-spec Walk a range of pages\n" |
| 783 | " -b|--bits bits-spec Walk pages with specified bits\n" |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 784 | " -c|--cgroup path|@inode Walk pages within memory cgroup\n" |
Alex Chiang | 9fdcd88 | 2009-12-14 17:57:53 -0800 | [diff] [blame] | 785 | " -p|--pid pid Walk process address space\n" |
Alex Chiang | 9fdcd88 | 2009-12-14 17:57:53 -0800 | [diff] [blame] | 786 | " -f|--file filename Walk file address space\n" |
Alex Chiang | 9fdcd88 | 2009-12-14 17:57:53 -0800 | [diff] [blame] | 787 | " -l|--list Show page details in ranges\n" |
| 788 | " -L|--list-each Show page details one by one\n" |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 789 | " -C|--list-cgroup Show cgroup inode for pages\n" |
Tommi Rantala | c7825cf | 2010-08-05 11:23:11 -0700 | [diff] [blame] | 790 | " -N|--no-summary Don't show summary info\n" |
Alex Chiang | 9fdcd88 | 2009-12-14 17:57:53 -0800 | [diff] [blame] | 791 | " -X|--hwpoison hwpoison pages\n" |
| 792 | " -x|--unpoison unpoison pages\n" |
| 793 | " -h|--help Show this usage message\n" |
Alex Chiang | dcfe730 | 2009-12-14 17:57:52 -0800 | [diff] [blame] | 794 | "flags:\n" |
Alex Chiang | 9fdcd88 | 2009-12-14 17:57:53 -0800 | [diff] [blame] | 795 | " 0x10 bitfield format, e.g.\n" |
| 796 | " anon bit-name, e.g.\n" |
| 797 | " 0x10,anon comma-separated list, e.g.\n" |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 798 | "addr-spec:\n" |
Alex Chiang | 9fdcd88 | 2009-12-14 17:57:53 -0800 | [diff] [blame] | 799 | " N one page at offset N (unit: pages)\n" |
| 800 | " N+M pages range from N to N+M-1\n" |
| 801 | " N,M pages range from N to M-1\n" |
| 802 | " N, pages range from N to end\n" |
| 803 | " ,M pages range from 0 to M-1\n" |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 804 | "bits-spec:\n" |
Alex Chiang | 9fdcd88 | 2009-12-14 17:57:53 -0800 | [diff] [blame] | 805 | " bit1,bit2 (flags & (bit1|bit2)) != 0\n" |
| 806 | " bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n" |
| 807 | " bit1,~bit2 (flags & (bit1|bit2)) == bit1\n" |
| 808 | " =bit1,bit2 flags == (bit1|bit2)\n" |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 809 | "bit-names:\n" |
| 810 | ); |
| 811 | |
| 812 | for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { |
| 813 | if (!page_flag_names[i]) |
| 814 | continue; |
| 815 | printf("%16s%s", page_flag_names[i] + 2, |
| 816 | page_flag_type(1ULL << i)); |
| 817 | if (++j > 3) { |
| 818 | j = 0; |
| 819 | putchar('\n'); |
| 820 | } |
| 821 | } |
| 822 | printf("\n " |
| 823 | "(r) raw mode bits (o) overloaded bits\n"); |
| 824 | } |
| 825 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 826 | static unsigned long long parse_number(const char *str) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 827 | { |
| 828 | unsigned long long n; |
| 829 | |
| 830 | n = strtoll(str, NULL, 0); |
| 831 | |
| 832 | if (n == 0 && str[0] != '0') |
| 833 | fatal("invalid name or number: %s\n", str); |
| 834 | |
| 835 | return n; |
| 836 | } |
| 837 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 838 | static void parse_pid(const char *str) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 839 | { |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 840 | FILE *file; |
| 841 | char buf[5000]; |
| 842 | |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 843 | opt_pid = parse_number(str); |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 844 | |
| 845 | sprintf(buf, "/proc/%d/pagemap", opt_pid); |
Wu Fengguang | 31bbf66 | 2009-10-07 16:32:29 -0700 | [diff] [blame] | 846 | pagemap_fd = checked_open(buf, O_RDONLY); |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 847 | |
| 848 | sprintf(buf, "/proc/%d/maps", opt_pid); |
| 849 | file = fopen(buf, "r"); |
| 850 | if (!file) { |
| 851 | perror(buf); |
| 852 | exit(EXIT_FAILURE); |
| 853 | } |
| 854 | |
| 855 | while (fgets(buf, sizeof(buf), file) != NULL) { |
| 856 | unsigned long vm_start; |
| 857 | unsigned long vm_end; |
| 858 | unsigned long long pgoff; |
| 859 | int major, minor; |
| 860 | char r, w, x, s; |
| 861 | unsigned long ino; |
| 862 | int n; |
| 863 | |
| 864 | n = sscanf(buf, "%lx-%lx %c%c%c%c %llx %x:%x %lu", |
| 865 | &vm_start, |
| 866 | &vm_end, |
| 867 | &r, &w, &x, &s, |
| 868 | &pgoff, |
| 869 | &major, &minor, |
| 870 | &ino); |
| 871 | if (n < 10) { |
| 872 | fprintf(stderr, "unexpected line: %s\n", buf); |
| 873 | continue; |
| 874 | } |
| 875 | pg_start[nr_vmas] = vm_start / page_size; |
| 876 | pg_end[nr_vmas] = vm_end / page_size; |
| 877 | if (++nr_vmas >= MAX_VMAS) { |
| 878 | fprintf(stderr, "too many VMAs\n"); |
| 879 | break; |
| 880 | } |
| 881 | } |
| 882 | fclose(file); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 883 | } |
| 884 | |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 885 | static void show_file(const char *name, const struct stat *st) |
| 886 | { |
| 887 | unsigned long long size = st->st_size; |
| 888 | char atime[64], mtime[64]; |
| 889 | long now = time(NULL); |
| 890 | |
| 891 | printf("%s\tInode: %u\tSize: %llu (%llu pages)\n", |
| 892 | name, (unsigned)st->st_ino, |
| 893 | size, (size + page_size - 1) / page_size); |
| 894 | |
| 895 | strftime(atime, sizeof(atime), "%c", localtime(&st->st_atime)); |
| 896 | strftime(mtime, sizeof(mtime), "%c", localtime(&st->st_mtime)); |
| 897 | |
| 898 | printf("Modify: %s (%ld seconds ago)\nAccess: %s (%ld seconds ago)\n", |
| 899 | mtime, now - st->st_mtime, |
| 900 | atime, now - st->st_atime); |
| 901 | } |
| 902 | |
Konstantin Khlebnikov | 1d46598 | 2014-06-04 16:05:30 -0700 | [diff] [blame] | 903 | static sigjmp_buf sigbus_jmp; |
| 904 | |
| 905 | static void * volatile sigbus_addr; |
| 906 | |
| 907 | static void sigbus_handler(int sig, siginfo_t *info, void *ucontex) |
| 908 | { |
| 909 | (void)sig; |
| 910 | (void)ucontex; |
| 911 | sigbus_addr = info ? info->si_addr : NULL; |
| 912 | siglongjmp(sigbus_jmp, 1); |
| 913 | } |
| 914 | |
| 915 | static struct sigaction sigbus_action = { |
| 916 | .sa_sigaction = sigbus_handler, |
| 917 | .sa_flags = SA_SIGINFO, |
| 918 | }; |
| 919 | |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 920 | static void walk_file(const char *name, const struct stat *st) |
| 921 | { |
| 922 | uint8_t vec[PAGEMAP_BATCH]; |
| 923 | uint64_t buf[PAGEMAP_BATCH], flags; |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 924 | uint64_t cgroup = 0; |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 925 | unsigned long nr_pages, pfn, i; |
Konstantin Khlebnikov | 1d46598 | 2014-06-04 16:05:30 -0700 | [diff] [blame] | 926 | off_t off, end = st->st_size; |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 927 | int fd; |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 928 | ssize_t len; |
| 929 | void *ptr; |
| 930 | int first = 1; |
| 931 | |
| 932 | fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW); |
| 933 | |
Konstantin Khlebnikov | 1d46598 | 2014-06-04 16:05:30 -0700 | [diff] [blame] | 934 | for (off = 0; off < end; off += len) { |
| 935 | nr_pages = (end - off + page_size - 1) / page_size; |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 936 | if (nr_pages > PAGEMAP_BATCH) |
| 937 | nr_pages = PAGEMAP_BATCH; |
| 938 | len = nr_pages * page_size; |
| 939 | |
| 940 | ptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, off); |
| 941 | if (ptr == MAP_FAILED) |
| 942 | fatal("mmap failed: %s", name); |
| 943 | |
| 944 | /* determine cached pages */ |
| 945 | if (mincore(ptr, len, vec)) |
| 946 | fatal("mincore failed: %s", name); |
| 947 | |
| 948 | /* turn off readahead */ |
| 949 | if (madvise(ptr, len, MADV_RANDOM)) |
| 950 | fatal("madvice failed: %s", name); |
| 951 | |
Konstantin Khlebnikov | 1d46598 | 2014-06-04 16:05:30 -0700 | [diff] [blame] | 952 | if (sigsetjmp(sigbus_jmp, 1)) { |
| 953 | end = off + sigbus_addr ? sigbus_addr - ptr : 0; |
| 954 | fprintf(stderr, "got sigbus at offset %lld: %s\n", |
| 955 | (long long)end, name); |
| 956 | goto got_sigbus; |
| 957 | } |
| 958 | |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 959 | /* populate ptes */ |
| 960 | for (i = 0; i < nr_pages ; i++) { |
| 961 | if (vec[i] & 1) |
| 962 | (void)*(volatile int *)(ptr + i * page_size); |
| 963 | } |
Konstantin Khlebnikov | 1d46598 | 2014-06-04 16:05:30 -0700 | [diff] [blame] | 964 | got_sigbus: |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 965 | |
| 966 | /* turn off harvesting reference bits */ |
| 967 | if (madvise(ptr, len, MADV_SEQUENTIAL)) |
| 968 | fatal("madvice failed: %s", name); |
| 969 | |
| 970 | if (pagemap_read(buf, (unsigned long)ptr / page_size, |
| 971 | nr_pages) != nr_pages) |
| 972 | fatal("cannot read pagemap"); |
| 973 | |
| 974 | munmap(ptr, len); |
| 975 | |
| 976 | for (i = 0; i < nr_pages; i++) { |
| 977 | pfn = pagemap_pfn(buf[i]); |
| 978 | if (!pfn) |
| 979 | continue; |
| 980 | if (!kpageflags_read(&flags, pfn, 1)) |
| 981 | continue; |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 982 | if (!kpagecgroup_read(&cgroup, pfn, 1)) |
| 983 | fatal("kpagecgroup_read failed"); |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 984 | if (first && opt_list) { |
| 985 | first = 0; |
| 986 | flush_page_range(); |
| 987 | show_file(name, st); |
| 988 | } |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 989 | add_page(off / page_size + i, pfn, |
| 990 | flags, cgroup, buf[i]); |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 991 | } |
| 992 | } |
| 993 | |
| 994 | close(fd); |
| 995 | } |
| 996 | |
| 997 | int walk_tree(const char *name, const struct stat *st, int type, struct FTW *f) |
| 998 | { |
| 999 | (void)f; |
| 1000 | switch (type) { |
| 1001 | case FTW_F: |
| 1002 | if (S_ISREG(st->st_mode)) |
| 1003 | walk_file(name, st); |
| 1004 | break; |
| 1005 | case FTW_DNR: |
| 1006 | fprintf(stderr, "cannot read dir: %s\n", name); |
| 1007 | break; |
| 1008 | } |
| 1009 | return 0; |
| 1010 | } |
| 1011 | |
| 1012 | static void walk_page_cache(void) |
| 1013 | { |
| 1014 | struct stat st; |
| 1015 | |
| 1016 | kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); |
| 1017 | pagemap_fd = checked_open("/proc/self/pagemap", O_RDONLY); |
Konstantin Khlebnikov | 1d46598 | 2014-06-04 16:05:30 -0700 | [diff] [blame] | 1018 | sigaction(SIGBUS, &sigbus_action, NULL); |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 1019 | |
| 1020 | if (stat(opt_file, &st)) |
| 1021 | fatal("stat failed: %s\n", opt_file); |
| 1022 | |
| 1023 | if (S_ISREG(st.st_mode)) { |
| 1024 | walk_file(opt_file, &st); |
| 1025 | } else if (S_ISDIR(st.st_mode)) { |
| 1026 | /* do not follow symlinks and mountpoints */ |
| 1027 | if (nftw(opt_file, walk_tree, 64, FTW_MOUNT | FTW_PHYS) < 0) |
| 1028 | fatal("nftw failed: %s\n", opt_file); |
| 1029 | } else |
| 1030 | fatal("unhandled file type: %s\n", opt_file); |
| 1031 | |
| 1032 | close(kpageflags_fd); |
| 1033 | close(pagemap_fd); |
Konstantin Khlebnikov | 1d46598 | 2014-06-04 16:05:30 -0700 | [diff] [blame] | 1034 | signal(SIGBUS, SIG_DFL); |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 1035 | } |
| 1036 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 1037 | static void parse_file(const char *name) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1038 | { |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 1039 | opt_file = name; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1040 | } |
| 1041 | |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 1042 | static void parse_cgroup(const char *path) |
| 1043 | { |
| 1044 | if (path[0] == '@') { |
| 1045 | opt_cgroup = parse_number(path + 1); |
| 1046 | return; |
| 1047 | } |
| 1048 | |
| 1049 | struct stat st; |
| 1050 | |
| 1051 | if (stat(path, &st)) |
| 1052 | fatal("stat failed: %s: %m\n", path); |
| 1053 | |
| 1054 | if (!S_ISDIR(st.st_mode)) |
| 1055 | fatal("cgroup supposed to be a directory: %s\n", path); |
| 1056 | |
| 1057 | opt_cgroup = st.st_ino; |
| 1058 | } |
| 1059 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 1060 | static void parse_addr_range(const char *optarg) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1061 | { |
| 1062 | unsigned long offset; |
| 1063 | unsigned long size; |
| 1064 | char *p; |
| 1065 | |
| 1066 | p = strchr(optarg, ','); |
| 1067 | if (!p) |
| 1068 | p = strchr(optarg, '+'); |
| 1069 | |
| 1070 | if (p == optarg) { |
| 1071 | offset = 0; |
| 1072 | size = parse_number(p + 1); |
| 1073 | } else if (p) { |
| 1074 | offset = parse_number(optarg); |
| 1075 | if (p[1] == '\0') |
| 1076 | size = ULONG_MAX; |
| 1077 | else { |
| 1078 | size = parse_number(p + 1); |
| 1079 | if (*p == ',') { |
| 1080 | if (size < offset) |
| 1081 | fatal("invalid range: %lu,%lu\n", |
| 1082 | offset, size); |
| 1083 | size -= offset; |
| 1084 | } |
| 1085 | } |
| 1086 | } else { |
| 1087 | offset = parse_number(optarg); |
| 1088 | size = 1; |
| 1089 | } |
| 1090 | |
| 1091 | add_addr_range(offset, size); |
| 1092 | } |
| 1093 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 1094 | static void add_bits_filter(uint64_t mask, uint64_t bits) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1095 | { |
| 1096 | if (nr_bit_filters >= MAX_BIT_FILTERS) |
| 1097 | fatal("too much bit filters\n"); |
| 1098 | |
| 1099 | opt_mask[nr_bit_filters] = mask; |
| 1100 | opt_bits[nr_bit_filters] = bits; |
| 1101 | nr_bit_filters++; |
| 1102 | } |
| 1103 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 1104 | static uint64_t parse_flag_name(const char *str, int len) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1105 | { |
Ulrich Drepper | e30d539 | 2012-05-29 15:06:30 -0700 | [diff] [blame] | 1106 | size_t i; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1107 | |
| 1108 | if (!*str || !len) |
| 1109 | return 0; |
| 1110 | |
| 1111 | if (len <= 8 && !strncmp(str, "compound", len)) |
| 1112 | return BITS_COMPOUND; |
| 1113 | |
| 1114 | for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) { |
| 1115 | if (!page_flag_names[i]) |
| 1116 | continue; |
| 1117 | if (!strncmp(str, page_flag_names[i] + 2, len)) |
| 1118 | return 1ULL << i; |
| 1119 | } |
| 1120 | |
| 1121 | return parse_number(str); |
| 1122 | } |
| 1123 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 1124 | static uint64_t parse_flag_names(const char *str, int all) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1125 | { |
| 1126 | const char *p = str; |
| 1127 | uint64_t flags = 0; |
| 1128 | |
| 1129 | while (1) { |
| 1130 | if (*p == ',' || *p == '=' || *p == '\0') { |
| 1131 | if ((*str != '~') || (*str == '~' && all && *++str)) |
| 1132 | flags |= parse_flag_name(str, p - str); |
| 1133 | if (*p != ',') |
| 1134 | break; |
| 1135 | str = p + 1; |
| 1136 | } |
| 1137 | p++; |
| 1138 | } |
| 1139 | |
| 1140 | return flags; |
| 1141 | } |
| 1142 | |
Ladinu Chandrasinghe | b7ed698 | 2009-09-22 16:43:42 -0700 | [diff] [blame] | 1143 | static void parse_bits_mask(const char *optarg) |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1144 | { |
| 1145 | uint64_t mask; |
| 1146 | uint64_t bits; |
| 1147 | const char *p; |
| 1148 | |
| 1149 | p = strchr(optarg, '='); |
| 1150 | if (p == optarg) { |
| 1151 | mask = KPF_ALL_BITS; |
| 1152 | bits = parse_flag_names(p + 1, 0); |
| 1153 | } else if (p) { |
| 1154 | mask = parse_flag_names(optarg, 0); |
| 1155 | bits = parse_flag_names(p + 1, 0); |
| 1156 | } else if (strchr(optarg, '~')) { |
| 1157 | mask = parse_flag_names(optarg, 1); |
| 1158 | bits = parse_flag_names(optarg, 0); |
| 1159 | } else { |
| 1160 | mask = parse_flag_names(optarg, 0); |
| 1161 | bits = KPF_ALL_BITS; |
| 1162 | } |
| 1163 | |
| 1164 | add_bits_filter(mask, bits); |
| 1165 | } |
| 1166 | |
Alex Chiang | dcfe730 | 2009-12-14 17:57:52 -0800 | [diff] [blame] | 1167 | static void describe_flags(const char *optarg) |
| 1168 | { |
| 1169 | uint64_t flags = parse_flag_names(optarg, 0); |
| 1170 | |
| 1171 | printf("0x%016llx\t%s\t%s\n", |
| 1172 | (unsigned long long)flags, |
| 1173 | page_flag_name(flags), |
| 1174 | page_flag_longname(flags)); |
| 1175 | } |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1176 | |
Tommi Rantala | 3428838 | 2009-12-14 17:57:48 -0800 | [diff] [blame] | 1177 | static const struct option opts[] = { |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1178 | { "raw" , 0, NULL, 'r' }, |
| 1179 | { "pid" , 1, NULL, 'p' }, |
| 1180 | { "file" , 1, NULL, 'f' }, |
| 1181 | { "addr" , 1, NULL, 'a' }, |
| 1182 | { "bits" , 1, NULL, 'b' }, |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 1183 | { "cgroup" , 1, NULL, 'c' }, |
Alex Chiang | dcfe730 | 2009-12-14 17:57:52 -0800 | [diff] [blame] | 1184 | { "describe" , 1, NULL, 'd' }, |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1185 | { "list" , 0, NULL, 'l' }, |
| 1186 | { "list-each" , 0, NULL, 'L' }, |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 1187 | { "list-cgroup", 0, NULL, 'C' }, |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1188 | { "no-summary", 0, NULL, 'N' }, |
Wu Fengguang | a54fed9 | 2009-10-07 16:32:32 -0700 | [diff] [blame] | 1189 | { "hwpoison" , 0, NULL, 'X' }, |
| 1190 | { "unpoison" , 0, NULL, 'x' }, |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1191 | { "help" , 0, NULL, 'h' }, |
| 1192 | { NULL , 0, NULL, 0 } |
| 1193 | }; |
| 1194 | |
| 1195 | int main(int argc, char *argv[]) |
| 1196 | { |
| 1197 | int c; |
| 1198 | |
| 1199 | page_size = getpagesize(); |
| 1200 | |
| 1201 | while ((c = getopt_long(argc, argv, |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 1202 | "rp:f:a:b:d:c:ClLNXxh", opts, NULL)) != -1) { |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1203 | switch (c) { |
| 1204 | case 'r': |
| 1205 | opt_raw = 1; |
| 1206 | break; |
| 1207 | case 'p': |
| 1208 | parse_pid(optarg); |
| 1209 | break; |
| 1210 | case 'f': |
| 1211 | parse_file(optarg); |
| 1212 | break; |
| 1213 | case 'a': |
| 1214 | parse_addr_range(optarg); |
| 1215 | break; |
| 1216 | case 'b': |
| 1217 | parse_bits_mask(optarg); |
| 1218 | break; |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 1219 | case 'c': |
| 1220 | parse_cgroup(optarg); |
| 1221 | break; |
| 1222 | case 'C': |
| 1223 | opt_list_cgroup = 1; |
| 1224 | break; |
Alex Chiang | dcfe730 | 2009-12-14 17:57:52 -0800 | [diff] [blame] | 1225 | case 'd': |
Alex Chiang | dcfe730 | 2009-12-14 17:57:52 -0800 | [diff] [blame] | 1226 | describe_flags(optarg); |
Alex Chiang | bb86a73 | 2009-12-14 17:57:54 -0800 | [diff] [blame] | 1227 | exit(0); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1228 | case 'l': |
| 1229 | opt_list = 1; |
| 1230 | break; |
| 1231 | case 'L': |
| 1232 | opt_list = 2; |
| 1233 | break; |
| 1234 | case 'N': |
| 1235 | opt_no_summary = 1; |
| 1236 | break; |
Wu Fengguang | a54fed9 | 2009-10-07 16:32:32 -0700 | [diff] [blame] | 1237 | case 'X': |
| 1238 | opt_hwpoison = 1; |
| 1239 | prepare_hwpoison_fd(); |
| 1240 | break; |
| 1241 | case 'x': |
| 1242 | opt_unpoison = 1; |
| 1243 | prepare_hwpoison_fd(); |
| 1244 | break; |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1245 | case 'h': |
| 1246 | usage(); |
| 1247 | exit(0); |
| 1248 | default: |
| 1249 | usage(); |
| 1250 | exit(1); |
| 1251 | } |
| 1252 | } |
| 1253 | |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 1254 | if (opt_cgroup || opt_list_cgroup) |
| 1255 | kpagecgroup_fd = checked_open(PROC_KPAGECGROUP, O_RDONLY); |
| 1256 | |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 1257 | if (opt_list && opt_pid) |
| 1258 | printf("voffset\t"); |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 1259 | if (opt_list && opt_file) |
| 1260 | printf("foffset\t"); |
Konstantin Khlebnikov | 075db15 | 2016-03-17 14:18:18 -0700 | [diff] [blame] | 1261 | if (opt_list && opt_list_cgroup) |
| 1262 | printf("cgroup\t"); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1263 | if (opt_list == 1) |
Wu Fengguang | 0b4b2ad | 2009-09-23 15:56:16 -0700 | [diff] [blame] | 1264 | printf("offset\tlen\tflags\n"); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1265 | if (opt_list == 2) |
| 1266 | printf("offset\tflags\n"); |
| 1267 | |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 1268 | if (opt_file) |
| 1269 | walk_page_cache(); |
| 1270 | else |
| 1271 | walk_addr_ranges(); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1272 | |
| 1273 | if (opt_list == 1) |
Konstantin Khlebnikov | 65a6a41 | 2014-04-07 15:37:15 -0700 | [diff] [blame] | 1274 | flush_page_range(); |
Wu Fengguang | 35efa5e | 2009-06-16 15:32:27 -0700 | [diff] [blame] | 1275 | |
| 1276 | if (opt_no_summary) |
| 1277 | return 0; |
| 1278 | |
| 1279 | if (opt_list) |
| 1280 | printf("\n\n"); |
| 1281 | |
| 1282 | show_summary(); |
| 1283 | |
| 1284 | return 0; |
| 1285 | } |