2 * page-types: Tool for querying page flags
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.
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
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.
17 * Copyright (C) 2009 Intel corporation
19 * Authors: Wu Fengguang <fengguang.wu@intel.com>
22 #define _FILE_OFFSET_BITS 64
37 #include <sys/types.h>
38 #include <sys/errno.h>
39 #include <sys/fcntl.h>
40 #include <sys/mount.h>
41 #include <sys/statfs.h>
43 #include "../../include/uapi/linux/magic.h"
44 #include "../../include/uapi/linux/kernel-page-flags.h"
45 #include <api/fs/fs.h>
53 # define STR(x) _STR(x)
57 * pagemap kernel ABI bits
60 #define PM_ENTRY_BYTES 8
61 #define PM_PFRAME_BITS 55
62 #define PM_PFRAME_MASK ((1LL << PM_PFRAME_BITS) - 1)
63 #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK)
64 #define PM_SOFT_DIRTY (1ULL << 55)
65 #define PM_MMAP_EXCLUSIVE (1ULL << 56)
66 #define PM_FILE (1ULL << 61)
67 #define PM_SWAP (1ULL << 62)
68 #define PM_PRESENT (1ULL << 63)
75 #define PROC_KPAGEFLAGS "/proc/kpageflags"
77 /* [32-] kernel hacking assistances */
78 #define KPF_RESERVED 32
79 #define KPF_MLOCKED 33
80 #define KPF_MAPPEDTODISK 34
81 #define KPF_PRIVATE 35
82 #define KPF_PRIVATE_2 36
83 #define KPF_OWNER_PRIVATE 37
85 #define KPF_UNCACHED 39
86 #define KPF_SOFTDIRTY 40
88 /* [48-] take some arbitrary free slots for expanding overloaded flags
89 * not part of kernel API
91 #define KPF_READAHEAD 48
92 #define KPF_SLOB_FREE 49
93 #define KPF_SLUB_FROZEN 50
94 #define KPF_SLUB_DEBUG 51
96 #define KPF_MMAP_EXCLUSIVE 63
98 #define KPF_ALL_BITS ((uint64_t)~0ULL)
99 #define KPF_HACKERS_BITS (0xffffULL << 32)
100 #define KPF_OVERLOADED_BITS (0xffffULL << 48)
101 #define BIT(name) (1ULL << KPF_##name)
102 #define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL))
104 static const char * const page_flag_names[] = {
105 [KPF_LOCKED] = "L:locked",
106 [KPF_ERROR] = "E:error",
107 [KPF_REFERENCED] = "R:referenced",
108 [KPF_UPTODATE] = "U:uptodate",
109 [KPF_DIRTY] = "D:dirty",
111 [KPF_ACTIVE] = "A:active",
112 [KPF_SLAB] = "S:slab",
113 [KPF_WRITEBACK] = "W:writeback",
114 [KPF_RECLAIM] = "I:reclaim",
115 [KPF_BUDDY] = "B:buddy",
117 [KPF_MMAP] = "M:mmap",
118 [KPF_ANON] = "a:anonymous",
119 [KPF_SWAPCACHE] = "s:swapcache",
120 [KPF_SWAPBACKED] = "b:swapbacked",
121 [KPF_COMPOUND_HEAD] = "H:compound_head",
122 [KPF_COMPOUND_TAIL] = "T:compound_tail",
123 [KPF_HUGE] = "G:huge",
124 [KPF_UNEVICTABLE] = "u:unevictable",
125 [KPF_HWPOISON] = "X:hwpoison",
126 [KPF_NOPAGE] = "n:nopage",
129 [KPF_BALLOON] = "o:balloon",
130 [KPF_ZERO_PAGE] = "z:zero_page",
131 [KPF_IDLE] = "i:idle_page",
133 [KPF_RESERVED] = "r:reserved",
134 [KPF_MLOCKED] = "m:mlocked",
135 [KPF_MAPPEDTODISK] = "d:mappedtodisk",
136 [KPF_PRIVATE] = "P:private",
137 [KPF_PRIVATE_2] = "p:private_2",
138 [KPF_OWNER_PRIVATE] = "O:owner_private",
139 [KPF_ARCH] = "h:arch",
140 [KPF_UNCACHED] = "c:uncached",
141 [KPF_SOFTDIRTY] = "f:softdirty",
143 [KPF_READAHEAD] = "I:readahead",
144 [KPF_SLOB_FREE] = "P:slob_free",
145 [KPF_SLUB_FROZEN] = "A:slub_frozen",
146 [KPF_SLUB_DEBUG] = "E:slub_debug",
148 [KPF_FILE] = "F:file",
149 [KPF_MMAP_EXCLUSIVE] = "1:mmap_exclusive",
157 static int opt_raw; /* for kernel developers */
158 static int opt_list; /* list pages (in ranges) */
159 static int opt_no_summary; /* don't show summary */
160 static pid_t opt_pid; /* process to walk */
161 const char * opt_file;
163 #define MAX_ADDR_RANGES 1024
164 static int nr_addr_ranges;
165 static unsigned long opt_offset[MAX_ADDR_RANGES];
166 static unsigned long opt_size[MAX_ADDR_RANGES];
168 #define MAX_VMAS 10240
170 static unsigned long pg_start[MAX_VMAS];
171 static unsigned long pg_end[MAX_VMAS];
173 #define MAX_BIT_FILTERS 64
174 static int nr_bit_filters;
175 static uint64_t opt_mask[MAX_BIT_FILTERS];
176 static uint64_t opt_bits[MAX_BIT_FILTERS];
178 static int page_size;
180 static int pagemap_fd;
181 static int kpageflags_fd;
183 static int opt_hwpoison;
184 static int opt_unpoison;
186 static const char *hwpoison_debug_fs;
187 static int hwpoison_inject_fd;
188 static int hwpoison_forget_fd;
190 #define HASH_SHIFT 13
191 #define HASH_SIZE (1 << HASH_SHIFT)
192 #define HASH_MASK (HASH_SIZE - 1)
193 #define HASH_KEY(flags) (flags & HASH_MASK)
195 static unsigned long total_pages;
196 static unsigned long nr_pages[HASH_SIZE];
197 static uint64_t page_flags[HASH_SIZE];
204 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
206 #define min_t(type, x, y) ({ \
209 __min1 < __min2 ? __min1 : __min2; })
211 #define max_t(type, x, y) ({ \
214 __max1 > __max2 ? __max1 : __max2; })
216 static unsigned long pages2mb(unsigned long pages)
218 return (pages * page_size) >> 20;
221 static void fatal(const char *x, ...)
226 vfprintf(stderr, x, ap);
231 static int checked_open(const char *pathname, int flags)
233 int fd = open(pathname, flags);
244 * pagemap/kpageflags routines
247 static unsigned long do_u64_read(int fd, char *name,
254 if (index > ULONG_MAX / 8)
255 fatal("index overflow: %lu\n", index);
257 bytes = pread(fd, buf, count * 8, (off_t)index * 8);
263 fatal("partial read: %lu bytes\n", bytes);
268 static unsigned long kpageflags_read(uint64_t *buf,
272 return do_u64_read(kpageflags_fd, PROC_KPAGEFLAGS, buf, index, pages);
275 static unsigned long pagemap_read(uint64_t *buf,
279 return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages);
282 static unsigned long pagemap_pfn(uint64_t val)
286 if (val & PM_PRESENT)
287 pfn = PM_PFRAME(val);
299 static char *page_flag_name(uint64_t flags)
305 for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) {
306 present = (flags >> i) & 1;
307 if (!page_flag_names[i]) {
309 fatal("unknown flag bit %d\n", i);
312 buf[j++] = present ? page_flag_names[i][0] : '_';
318 static char *page_flag_longname(uint64_t flags)
320 static char buf[1024];
323 for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) {
324 if (!page_flag_names[i])
326 if ((flags >> i) & 1)
327 n += snprintf(buf + n, sizeof(buf) - n, "%s,",
328 page_flag_names[i] + 2);
339 * page list and summary
342 static void show_page_range(unsigned long voffset, unsigned long offset,
343 unsigned long size, uint64_t flags)
345 static uint64_t flags0;
346 static unsigned long voff;
347 static unsigned long index;
348 static unsigned long count;
350 if (flags == flags0 && offset == index + count &&
351 size && voffset == voff + count) {
358 printf("%lx\t", voff);
360 printf("%lu\t", voff);
361 printf("%lx\t%lx\t%s\n",
362 index, count, page_flag_name(flags0));
371 static void flush_page_range(void)
373 show_page_range(0, 0, 0, 0);
376 static void show_page(unsigned long voffset,
377 unsigned long offset, uint64_t flags)
380 printf("%lx\t", voffset);
382 printf("%lu\t", voffset);
383 printf("%lx\t%s\n", offset, page_flag_name(flags));
386 static void show_summary(void)
390 printf(" flags\tpage-count MB"
391 " symbolic-flags\t\t\tlong-symbolic-flags\n");
393 for (i = 0; i < ARRAY_SIZE(nr_pages); i++) {
395 printf("0x%016llx\t%10lu %8lu %s\t%s\n",
396 (unsigned long long)page_flags[i],
398 pages2mb(nr_pages[i]),
399 page_flag_name(page_flags[i]),
400 page_flag_longname(page_flags[i]));
403 printf(" total\t%10lu %8lu\n",
404 total_pages, pages2mb(total_pages));
412 static int bit_mask_ok(uint64_t flags)
416 for (i = 0; i < nr_bit_filters; i++) {
417 if (opt_bits[i] == KPF_ALL_BITS) {
418 if ((flags & opt_mask[i]) == 0)
421 if ((flags & opt_mask[i]) != opt_bits[i])
429 static uint64_t expand_overloaded_flags(uint64_t flags, uint64_t pme)
431 /* SLOB/SLUB overload several page flags */
432 if (flags & BIT(SLAB)) {
433 if (flags & BIT(PRIVATE))
434 flags ^= BIT(PRIVATE) | BIT(SLOB_FREE);
435 if (flags & BIT(ACTIVE))
436 flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN);
437 if (flags & BIT(ERROR))
438 flags ^= BIT(ERROR) | BIT(SLUB_DEBUG);
441 /* PG_reclaim is overloaded as PG_readahead in the read path */
442 if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM))
443 flags ^= BIT(RECLAIM) | BIT(READAHEAD);
445 if (pme & PM_SOFT_DIRTY)
446 flags |= BIT(SOFTDIRTY);
449 if (pme & PM_MMAP_EXCLUSIVE)
450 flags |= BIT(MMAP_EXCLUSIVE);
455 static uint64_t well_known_flags(uint64_t flags)
457 /* hide flags intended only for kernel hacker */
458 flags &= ~KPF_HACKERS_BITS;
460 /* hide non-hugeTLB compound pages */
461 if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE)))
462 flags &= ~BITS_COMPOUND;
467 static uint64_t kpageflags_flags(uint64_t flags, uint64_t pme)
470 flags = expand_overloaded_flags(flags, pme);
472 flags = well_known_flags(flags);
481 static void prepare_hwpoison_fd(void)
483 char buf[MAX_PATH + 1];
485 hwpoison_debug_fs = debugfs__mount();
486 if (!hwpoison_debug_fs) {
487 perror("mount debugfs");
491 if (opt_hwpoison && !hwpoison_inject_fd) {
492 snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn",
494 hwpoison_inject_fd = checked_open(buf, O_WRONLY);
497 if (opt_unpoison && !hwpoison_forget_fd) {
498 snprintf(buf, MAX_PATH, "%s/hwpoison/unpoison-pfn",
500 hwpoison_forget_fd = checked_open(buf, O_WRONLY);
504 static int hwpoison_page(unsigned long offset)
509 len = sprintf(buf, "0x%lx\n", offset);
510 len = write(hwpoison_inject_fd, buf, len);
512 perror("hwpoison inject");
518 static int unpoison_page(unsigned long offset)
523 len = sprintf(buf, "0x%lx\n", offset);
524 len = write(hwpoison_forget_fd, buf, len);
526 perror("hwpoison forget");
536 static size_t hash_slot(uint64_t flags)
538 size_t k = HASH_KEY(flags);
541 /* Explicitly reserve slot 0 for flags 0: the following logic
542 * cannot distinguish an unoccupied slot from slot (flags==0).
547 /* search through the remaining (HASH_SIZE-1) slots */
548 for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) {
549 if (!k || k >= ARRAY_SIZE(page_flags))
551 if (page_flags[k] == 0) {
552 page_flags[k] = flags;
555 if (page_flags[k] == flags)
559 fatal("hash table full: bump up HASH_SHIFT?\n");
563 static void add_page(unsigned long voffset,
564 unsigned long offset, uint64_t flags, uint64_t pme)
566 flags = kpageflags_flags(flags, pme);
568 if (!bit_mask_ok(flags))
572 hwpoison_page(offset);
574 unpoison_page(offset);
577 show_page_range(voffset, offset, 1, flags);
578 else if (opt_list == 2)
579 show_page(voffset, offset, flags);
581 nr_pages[hash_slot(flags)]++;
585 #define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */
586 static void walk_pfn(unsigned long voffset,
591 uint64_t buf[KPAGEFLAGS_BATCH];
597 batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH);
598 pages = kpageflags_read(buf, index, batch);
602 for (i = 0; i < pages; i++)
603 add_page(voffset + i, index + i, buf[i], pme);
610 #define PAGEMAP_BATCH (64 << 10)
611 static void walk_vma(unsigned long index, unsigned long count)
613 uint64_t buf[PAGEMAP_BATCH];
620 batch = min_t(unsigned long, count, PAGEMAP_BATCH);
621 pages = pagemap_read(buf, index, batch);
625 for (i = 0; i < pages; i++) {
626 pfn = pagemap_pfn(buf[i]);
628 walk_pfn(index + i, pfn, 1, buf[i]);
636 static void walk_task(unsigned long index, unsigned long count)
638 const unsigned long end = index + count;
642 while (index < end) {
644 while (pg_end[i] <= index)
647 if (pg_start[i] >= end)
650 start = max_t(unsigned long, pg_start[i], index);
651 index = min_t(unsigned long, pg_end[i], end);
653 assert(start < index);
654 walk_vma(start, index - start);
658 static void add_addr_range(unsigned long offset, unsigned long size)
660 if (nr_addr_ranges >= MAX_ADDR_RANGES)
661 fatal("too many addr ranges\n");
663 opt_offset[nr_addr_ranges] = offset;
664 opt_size[nr_addr_ranges] = min_t(unsigned long, size, ULONG_MAX-offset);
668 static void walk_addr_ranges(void)
672 kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY);
675 add_addr_range(0, ULONG_MAX);
677 for (i = 0; i < nr_addr_ranges; i++)
679 walk_pfn(opt_offset[i], opt_offset[i], opt_size[i], 0);
681 walk_task(opt_offset[i], opt_size[i]);
683 close(kpageflags_fd);
691 static const char *page_flag_type(uint64_t flag)
693 if (flag & KPF_HACKERS_BITS)
695 if (flag & KPF_OVERLOADED_BITS)
700 static void usage(void)
705 "page-types [options]\n"
706 " -r|--raw Raw mode, for kernel developers\n"
707 " -d|--describe flags Describe flags\n"
708 " -a|--addr addr-spec Walk a range of pages\n"
709 " -b|--bits bits-spec Walk pages with specified bits\n"
710 " -p|--pid pid Walk process address space\n"
711 " -f|--file filename Walk file address space\n"
712 " -l|--list Show page details in ranges\n"
713 " -L|--list-each Show page details one by one\n"
714 " -N|--no-summary Don't show summary info\n"
715 " -X|--hwpoison hwpoison pages\n"
716 " -x|--unpoison unpoison pages\n"
717 " -h|--help Show this usage message\n"
719 " 0x10 bitfield format, e.g.\n"
720 " anon bit-name, e.g.\n"
721 " 0x10,anon comma-separated list, e.g.\n"
723 " N one page at offset N (unit: pages)\n"
724 " N+M pages range from N to N+M-1\n"
725 " N,M pages range from N to M-1\n"
726 " N, pages range from N to end\n"
727 " ,M pages range from 0 to M-1\n"
729 " bit1,bit2 (flags & (bit1|bit2)) != 0\n"
730 " bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n"
731 " bit1,~bit2 (flags & (bit1|bit2)) == bit1\n"
732 " =bit1,bit2 flags == (bit1|bit2)\n"
736 for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) {
737 if (!page_flag_names[i])
739 printf("%16s%s", page_flag_names[i] + 2,
740 page_flag_type(1ULL << i));
747 "(r) raw mode bits (o) overloaded bits\n");
750 static unsigned long long parse_number(const char *str)
752 unsigned long long n;
754 n = strtoll(str, NULL, 0);
756 if (n == 0 && str[0] != '0')
757 fatal("invalid name or number: %s\n", str);
762 static void parse_pid(const char *str)
767 opt_pid = parse_number(str);
769 sprintf(buf, "/proc/%d/pagemap", opt_pid);
770 pagemap_fd = checked_open(buf, O_RDONLY);
772 sprintf(buf, "/proc/%d/maps", opt_pid);
773 file = fopen(buf, "r");
779 while (fgets(buf, sizeof(buf), file) != NULL) {
780 unsigned long vm_start;
781 unsigned long vm_end;
782 unsigned long long pgoff;
788 n = sscanf(buf, "%lx-%lx %c%c%c%c %llx %x:%x %lu",
796 fprintf(stderr, "unexpected line: %s\n", buf);
799 pg_start[nr_vmas] = vm_start / page_size;
800 pg_end[nr_vmas] = vm_end / page_size;
801 if (++nr_vmas >= MAX_VMAS) {
802 fprintf(stderr, "too many VMAs\n");
809 static void show_file(const char *name, const struct stat *st)
811 unsigned long long size = st->st_size;
812 char atime[64], mtime[64];
813 long now = time(NULL);
815 printf("%s\tInode: %u\tSize: %llu (%llu pages)\n",
816 name, (unsigned)st->st_ino,
817 size, (size + page_size - 1) / page_size);
819 strftime(atime, sizeof(atime), "%c", localtime(&st->st_atime));
820 strftime(mtime, sizeof(mtime), "%c", localtime(&st->st_mtime));
822 printf("Modify: %s (%ld seconds ago)\nAccess: %s (%ld seconds ago)\n",
823 mtime, now - st->st_mtime,
824 atime, now - st->st_atime);
827 static sigjmp_buf sigbus_jmp;
829 static void * volatile sigbus_addr;
831 static void sigbus_handler(int sig, siginfo_t *info, void *ucontex)
835 sigbus_addr = info ? info->si_addr : NULL;
836 siglongjmp(sigbus_jmp, 1);
839 static struct sigaction sigbus_action = {
840 .sa_sigaction = sigbus_handler,
841 .sa_flags = SA_SIGINFO,
844 static void walk_file(const char *name, const struct stat *st)
846 uint8_t vec[PAGEMAP_BATCH];
847 uint64_t buf[PAGEMAP_BATCH], flags;
848 unsigned long nr_pages, pfn, i;
849 off_t off, end = st->st_size;
855 fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW);
857 for (off = 0; off < end; off += len) {
858 nr_pages = (end - off + page_size - 1) / page_size;
859 if (nr_pages > PAGEMAP_BATCH)
860 nr_pages = PAGEMAP_BATCH;
861 len = nr_pages * page_size;
863 ptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, off);
864 if (ptr == MAP_FAILED)
865 fatal("mmap failed: %s", name);
867 /* determine cached pages */
868 if (mincore(ptr, len, vec))
869 fatal("mincore failed: %s", name);
871 /* turn off readahead */
872 if (madvise(ptr, len, MADV_RANDOM))
873 fatal("madvice failed: %s", name);
875 if (sigsetjmp(sigbus_jmp, 1)) {
876 end = off + sigbus_addr ? sigbus_addr - ptr : 0;
877 fprintf(stderr, "got sigbus at offset %lld: %s\n",
878 (long long)end, name);
883 for (i = 0; i < nr_pages ; i++) {
885 (void)*(volatile int *)(ptr + i * page_size);
889 /* turn off harvesting reference bits */
890 if (madvise(ptr, len, MADV_SEQUENTIAL))
891 fatal("madvice failed: %s", name);
893 if (pagemap_read(buf, (unsigned long)ptr / page_size,
894 nr_pages) != nr_pages)
895 fatal("cannot read pagemap");
899 for (i = 0; i < nr_pages; i++) {
900 pfn = pagemap_pfn(buf[i]);
903 if (!kpageflags_read(&flags, pfn, 1))
905 if (first && opt_list) {
910 add_page(off / page_size + i, pfn, flags, buf[i]);
917 int walk_tree(const char *name, const struct stat *st, int type, struct FTW *f)
922 if (S_ISREG(st->st_mode))
926 fprintf(stderr, "cannot read dir: %s\n", name);
932 static void walk_page_cache(void)
936 kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY);
937 pagemap_fd = checked_open("/proc/self/pagemap", O_RDONLY);
938 sigaction(SIGBUS, &sigbus_action, NULL);
940 if (stat(opt_file, &st))
941 fatal("stat failed: %s\n", opt_file);
943 if (S_ISREG(st.st_mode)) {
944 walk_file(opt_file, &st);
945 } else if (S_ISDIR(st.st_mode)) {
946 /* do not follow symlinks and mountpoints */
947 if (nftw(opt_file, walk_tree, 64, FTW_MOUNT | FTW_PHYS) < 0)
948 fatal("nftw failed: %s\n", opt_file);
950 fatal("unhandled file type: %s\n", opt_file);
952 close(kpageflags_fd);
954 signal(SIGBUS, SIG_DFL);
957 static void parse_file(const char *name)
962 static void parse_addr_range(const char *optarg)
964 unsigned long offset;
968 p = strchr(optarg, ',');
970 p = strchr(optarg, '+');
974 size = parse_number(p + 1);
976 offset = parse_number(optarg);
980 size = parse_number(p + 1);
983 fatal("invalid range: %lu,%lu\n",
989 offset = parse_number(optarg);
993 add_addr_range(offset, size);
996 static void add_bits_filter(uint64_t mask, uint64_t bits)
998 if (nr_bit_filters >= MAX_BIT_FILTERS)
999 fatal("too much bit filters\n");
1001 opt_mask[nr_bit_filters] = mask;
1002 opt_bits[nr_bit_filters] = bits;
1006 static uint64_t parse_flag_name(const char *str, int len)
1013 if (len <= 8 && !strncmp(str, "compound", len))
1014 return BITS_COMPOUND;
1016 for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) {
1017 if (!page_flag_names[i])
1019 if (!strncmp(str, page_flag_names[i] + 2, len))
1023 return parse_number(str);
1026 static uint64_t parse_flag_names(const char *str, int all)
1028 const char *p = str;
1032 if (*p == ',' || *p == '=' || *p == '\0') {
1033 if ((*str != '~') || (*str == '~' && all && *++str))
1034 flags |= parse_flag_name(str, p - str);
1045 static void parse_bits_mask(const char *optarg)
1051 p = strchr(optarg, '=');
1053 mask = KPF_ALL_BITS;
1054 bits = parse_flag_names(p + 1, 0);
1056 mask = parse_flag_names(optarg, 0);
1057 bits = parse_flag_names(p + 1, 0);
1058 } else if (strchr(optarg, '~')) {
1059 mask = parse_flag_names(optarg, 1);
1060 bits = parse_flag_names(optarg, 0);
1062 mask = parse_flag_names(optarg, 0);
1063 bits = KPF_ALL_BITS;
1066 add_bits_filter(mask, bits);
1069 static void describe_flags(const char *optarg)
1071 uint64_t flags = parse_flag_names(optarg, 0);
1073 printf("0x%016llx\t%s\t%s\n",
1074 (unsigned long long)flags,
1075 page_flag_name(flags),
1076 page_flag_longname(flags));
1079 static const struct option opts[] = {
1080 { "raw" , 0, NULL, 'r' },
1081 { "pid" , 1, NULL, 'p' },
1082 { "file" , 1, NULL, 'f' },
1083 { "addr" , 1, NULL, 'a' },
1084 { "bits" , 1, NULL, 'b' },
1085 { "describe" , 1, NULL, 'd' },
1086 { "list" , 0, NULL, 'l' },
1087 { "list-each" , 0, NULL, 'L' },
1088 { "no-summary", 0, NULL, 'N' },
1089 { "hwpoison" , 0, NULL, 'X' },
1090 { "unpoison" , 0, NULL, 'x' },
1091 { "help" , 0, NULL, 'h' },
1092 { NULL , 0, NULL, 0 }
1095 int main(int argc, char *argv[])
1099 page_size = getpagesize();
1101 while ((c = getopt_long(argc, argv,
1102 "rp:f:a:b:d:lLNXxh", opts, NULL)) != -1) {
1114 parse_addr_range(optarg);
1117 parse_bits_mask(optarg);
1120 describe_flags(optarg);
1133 prepare_hwpoison_fd();
1137 prepare_hwpoison_fd();
1148 if (opt_list && opt_pid)
1149 printf("voffset\t");
1150 if (opt_list && opt_file)
1151 printf("foffset\t");
1153 printf("offset\tlen\tflags\n");
1155 printf("offset\tflags\n");