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/debugfs.h>
53 # define STR(x) _STR(x)
57 * pagemap kernel ABI bits
60 #define PM_ENTRY_BYTES sizeof(uint64_t)
61 #define PM_STATUS_BITS 3
62 #define PM_STATUS_OFFSET (64 - PM_STATUS_BITS)
63 #define PM_STATUS_MASK (((1LL << PM_STATUS_BITS) - 1) << PM_STATUS_OFFSET)
64 #define PM_STATUS(nr) (((nr) << PM_STATUS_OFFSET) & PM_STATUS_MASK)
65 #define PM_PSHIFT_BITS 6
66 #define PM_PSHIFT_OFFSET (PM_STATUS_OFFSET - PM_PSHIFT_BITS)
67 #define PM_PSHIFT_MASK (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET)
68 #define __PM_PSHIFT(x) (((uint64_t) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK)
69 #define PM_PFRAME_MASK ((1LL << PM_PSHIFT_OFFSET) - 1)
70 #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK)
72 #define __PM_SOFT_DIRTY (1LL)
73 #define PM_PRESENT PM_STATUS(4LL)
74 #define PM_SWAP PM_STATUS(2LL)
75 #define PM_SOFT_DIRTY __PM_PSHIFT(__PM_SOFT_DIRTY)
83 #define PROC_KPAGEFLAGS "/proc/kpageflags"
85 /* [32-] kernel hacking assistances */
86 #define KPF_RESERVED 32
87 #define KPF_MLOCKED 33
88 #define KPF_MAPPEDTODISK 34
89 #define KPF_PRIVATE 35
90 #define KPF_PRIVATE_2 36
91 #define KPF_OWNER_PRIVATE 37
93 #define KPF_UNCACHED 39
94 #define KPF_SOFTDIRTY 40
96 /* [48-] take some arbitrary free slots for expanding overloaded flags
97 * not part of kernel API
99 #define KPF_READAHEAD 48
100 #define KPF_SLOB_FREE 49
101 #define KPF_SLUB_FROZEN 50
102 #define KPF_SLUB_DEBUG 51
104 #define KPF_ALL_BITS ((uint64_t)~0ULL)
105 #define KPF_HACKERS_BITS (0xffffULL << 32)
106 #define KPF_OVERLOADED_BITS (0xffffULL << 48)
107 #define BIT(name) (1ULL << KPF_##name)
108 #define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL))
110 static const char * const page_flag_names[] = {
111 [KPF_LOCKED] = "L:locked",
112 [KPF_ERROR] = "E:error",
113 [KPF_REFERENCED] = "R:referenced",
114 [KPF_UPTODATE] = "U:uptodate",
115 [KPF_DIRTY] = "D:dirty",
117 [KPF_ACTIVE] = "A:active",
118 [KPF_SLAB] = "S:slab",
119 [KPF_WRITEBACK] = "W:writeback",
120 [KPF_RECLAIM] = "I:reclaim",
121 [KPF_BUDDY] = "B:buddy",
123 [KPF_MMAP] = "M:mmap",
124 [KPF_ANON] = "a:anonymous",
125 [KPF_SWAPCACHE] = "s:swapcache",
126 [KPF_SWAPBACKED] = "b:swapbacked",
127 [KPF_COMPOUND_HEAD] = "H:compound_head",
128 [KPF_COMPOUND_TAIL] = "T:compound_tail",
129 [KPF_HUGE] = "G:huge",
130 [KPF_UNEVICTABLE] = "u:unevictable",
131 [KPF_HWPOISON] = "X:hwpoison",
132 [KPF_NOPAGE] = "n:nopage",
135 [KPF_BALLOON] = "o:balloon",
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",
145 [KPF_SOFTDIRTY] = "f:softdirty",
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",
154 static const char * const debugfs_known_mountpoints[] = {
164 static int opt_raw; /* for kernel developers */
165 static int opt_list; /* list pages (in ranges) */
166 static int opt_no_summary; /* don't show summary */
167 static pid_t opt_pid; /* process to walk */
168 const char * opt_file;
170 #define MAX_ADDR_RANGES 1024
171 static int nr_addr_ranges;
172 static unsigned long opt_offset[MAX_ADDR_RANGES];
173 static unsigned long opt_size[MAX_ADDR_RANGES];
175 #define MAX_VMAS 10240
177 static unsigned long pg_start[MAX_VMAS];
178 static unsigned long pg_end[MAX_VMAS];
180 #define MAX_BIT_FILTERS 64
181 static int nr_bit_filters;
182 static uint64_t opt_mask[MAX_BIT_FILTERS];
183 static uint64_t opt_bits[MAX_BIT_FILTERS];
185 static int page_size;
187 static int pagemap_fd;
188 static int kpageflags_fd;
190 static int opt_hwpoison;
191 static int opt_unpoison;
193 static char *hwpoison_debug_fs;
194 static int hwpoison_inject_fd;
195 static int hwpoison_forget_fd;
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)
202 static unsigned long total_pages;
203 static unsigned long nr_pages[HASH_SIZE];
204 static uint64_t page_flags[HASH_SIZE];
211 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
213 #define min_t(type, x, y) ({ \
216 __min1 < __min2 ? __min1 : __min2; })
218 #define max_t(type, x, y) ({ \
221 __max1 > __max2 ? __max1 : __max2; })
223 static unsigned long pages2mb(unsigned long pages)
225 return (pages * page_size) >> 20;
228 static void fatal(const char *x, ...)
233 vfprintf(stderr, x, ap);
238 static int checked_open(const char *pathname, int flags)
240 int fd = open(pathname, flags);
251 * pagemap/kpageflags routines
254 static unsigned long do_u64_read(int fd, char *name,
261 if (index > ULONG_MAX / 8)
262 fatal("index overflow: %lu\n", index);
264 bytes = pread(fd, buf, count * 8, (off_t)index * 8);
270 fatal("partial read: %lu bytes\n", bytes);
275 static unsigned long kpageflags_read(uint64_t *buf,
279 return do_u64_read(kpageflags_fd, PROC_KPAGEFLAGS, buf, index, pages);
282 static unsigned long pagemap_read(uint64_t *buf,
286 return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages);
289 static unsigned long pagemap_pfn(uint64_t val)
293 if (val & PM_PRESENT)
294 pfn = PM_PFRAME(val);
306 static char *page_flag_name(uint64_t flags)
312 for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) {
313 present = (flags >> i) & 1;
314 if (!page_flag_names[i]) {
316 fatal("unknown flag bit %d\n", i);
319 buf[j++] = present ? page_flag_names[i][0] : '_';
325 static char *page_flag_longname(uint64_t flags)
327 static char buf[1024];
330 for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) {
331 if (!page_flag_names[i])
333 if ((flags >> i) & 1)
334 n += snprintf(buf + n, sizeof(buf) - n, "%s,",
335 page_flag_names[i] + 2);
346 * page list and summary
349 static void show_page_range(unsigned long voffset, unsigned long offset,
350 unsigned long size, uint64_t flags)
352 static uint64_t flags0;
353 static unsigned long voff;
354 static unsigned long index;
355 static unsigned long count;
357 if (flags == flags0 && offset == index + count &&
358 size && voffset == voff + count) {
365 printf("%lx\t", voff);
367 printf("%lu\t", voff);
368 printf("%lx\t%lx\t%s\n",
369 index, count, page_flag_name(flags0));
378 static void flush_page_range(void)
380 show_page_range(0, 0, 0, 0);
383 static void show_page(unsigned long voffset,
384 unsigned long offset, uint64_t flags)
387 printf("%lx\t", voffset);
389 printf("%lu\t", voffset);
390 printf("%lx\t%s\n", offset, page_flag_name(flags));
393 static void show_summary(void)
397 printf(" flags\tpage-count MB"
398 " symbolic-flags\t\t\tlong-symbolic-flags\n");
400 for (i = 0; i < ARRAY_SIZE(nr_pages); i++) {
402 printf("0x%016llx\t%10lu %8lu %s\t%s\n",
403 (unsigned long long)page_flags[i],
405 pages2mb(nr_pages[i]),
406 page_flag_name(page_flags[i]),
407 page_flag_longname(page_flags[i]));
410 printf(" total\t%10lu %8lu\n",
411 total_pages, pages2mb(total_pages));
419 static int bit_mask_ok(uint64_t flags)
423 for (i = 0; i < nr_bit_filters; i++) {
424 if (opt_bits[i] == KPF_ALL_BITS) {
425 if ((flags & opt_mask[i]) == 0)
428 if ((flags & opt_mask[i]) != opt_bits[i])
436 static uint64_t expand_overloaded_flags(uint64_t flags, uint64_t pme)
438 /* SLOB/SLUB overload several page flags */
439 if (flags & BIT(SLAB)) {
440 if (flags & BIT(PRIVATE))
441 flags ^= BIT(PRIVATE) | BIT(SLOB_FREE);
442 if (flags & BIT(ACTIVE))
443 flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN);
444 if (flags & BIT(ERROR))
445 flags ^= BIT(ERROR) | BIT(SLUB_DEBUG);
448 /* PG_reclaim is overloaded as PG_readahead in the read path */
449 if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM))
450 flags ^= BIT(RECLAIM) | BIT(READAHEAD);
452 if (pme & PM_SOFT_DIRTY)
453 flags |= BIT(SOFTDIRTY);
458 static uint64_t well_known_flags(uint64_t flags)
460 /* hide flags intended only for kernel hacker */
461 flags &= ~KPF_HACKERS_BITS;
463 /* hide non-hugeTLB compound pages */
464 if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE)))
465 flags &= ~BITS_COMPOUND;
470 static uint64_t kpageflags_flags(uint64_t flags, uint64_t pme)
473 flags = expand_overloaded_flags(flags, pme);
475 flags = well_known_flags(flags);
484 static void prepare_hwpoison_fd(void)
486 char buf[MAX_PATH + 1];
488 hwpoison_debug_fs = debugfs_mount(NULL);
489 if (!hwpoison_debug_fs) {
490 perror("mount debugfs");
494 if (opt_hwpoison && !hwpoison_inject_fd) {
495 snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn",
497 hwpoison_inject_fd = checked_open(buf, O_WRONLY);
500 if (opt_unpoison && !hwpoison_forget_fd) {
501 snprintf(buf, MAX_PATH, "%s/hwpoison/unpoison-pfn",
503 hwpoison_forget_fd = checked_open(buf, O_WRONLY);
507 static int hwpoison_page(unsigned long offset)
512 len = sprintf(buf, "0x%lx\n", offset);
513 len = write(hwpoison_inject_fd, buf, len);
515 perror("hwpoison inject");
521 static int unpoison_page(unsigned long offset)
526 len = sprintf(buf, "0x%lx\n", offset);
527 len = write(hwpoison_forget_fd, buf, len);
529 perror("hwpoison forget");
539 static size_t hash_slot(uint64_t flags)
541 size_t k = HASH_KEY(flags);
544 /* Explicitly reserve slot 0 for flags 0: the following logic
545 * cannot distinguish an unoccupied slot from slot (flags==0).
550 /* search through the remaining (HASH_SIZE-1) slots */
551 for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) {
552 if (!k || k >= ARRAY_SIZE(page_flags))
554 if (page_flags[k] == 0) {
555 page_flags[k] = flags;
558 if (page_flags[k] == flags)
562 fatal("hash table full: bump up HASH_SHIFT?\n");
566 static void add_page(unsigned long voffset,
567 unsigned long offset, uint64_t flags, uint64_t pme)
569 flags = kpageflags_flags(flags, pme);
571 if (!bit_mask_ok(flags))
575 hwpoison_page(offset);
577 unpoison_page(offset);
580 show_page_range(voffset, offset, 1, flags);
581 else if (opt_list == 2)
582 show_page(voffset, offset, flags);
584 nr_pages[hash_slot(flags)]++;
588 #define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */
589 static void walk_pfn(unsigned long voffset,
594 uint64_t buf[KPAGEFLAGS_BATCH];
600 batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH);
601 pages = kpageflags_read(buf, index, batch);
605 for (i = 0; i < pages; i++)
606 add_page(voffset + i, index + i, buf[i], pme);
613 #define PAGEMAP_BATCH (64 << 10)
614 static void walk_vma(unsigned long index, unsigned long count)
616 uint64_t buf[PAGEMAP_BATCH];
623 batch = min_t(unsigned long, count, PAGEMAP_BATCH);
624 pages = pagemap_read(buf, index, batch);
628 for (i = 0; i < pages; i++) {
629 pfn = pagemap_pfn(buf[i]);
631 walk_pfn(index + i, pfn, 1, buf[i]);
639 static void walk_task(unsigned long index, unsigned long count)
641 const unsigned long end = index + count;
645 while (index < end) {
647 while (pg_end[i] <= index)
650 if (pg_start[i] >= end)
653 start = max_t(unsigned long, pg_start[i], index);
654 index = min_t(unsigned long, pg_end[i], end);
656 assert(start < index);
657 walk_vma(start, index - start);
661 static void add_addr_range(unsigned long offset, unsigned long size)
663 if (nr_addr_ranges >= MAX_ADDR_RANGES)
664 fatal("too many addr ranges\n");
666 opt_offset[nr_addr_ranges] = offset;
667 opt_size[nr_addr_ranges] = min_t(unsigned long, size, ULONG_MAX-offset);
671 static void walk_addr_ranges(void)
675 kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY);
678 add_addr_range(0, ULONG_MAX);
680 for (i = 0; i < nr_addr_ranges; i++)
682 walk_pfn(opt_offset[i], opt_offset[i], opt_size[i], 0);
684 walk_task(opt_offset[i], opt_size[i]);
686 close(kpageflags_fd);
694 static const char *page_flag_type(uint64_t flag)
696 if (flag & KPF_HACKERS_BITS)
698 if (flag & KPF_OVERLOADED_BITS)
703 static void usage(void)
708 "page-types [options]\n"
709 " -r|--raw Raw mode, for kernel developers\n"
710 " -d|--describe flags Describe flags\n"
711 " -a|--addr addr-spec Walk a range of pages\n"
712 " -b|--bits bits-spec Walk pages with specified bits\n"
713 " -p|--pid pid Walk process address space\n"
714 " -f|--file filename Walk file address space\n"
715 " -l|--list Show page details in ranges\n"
716 " -L|--list-each Show page details one by one\n"
717 " -N|--no-summary Don't show summary info\n"
718 " -X|--hwpoison hwpoison pages\n"
719 " -x|--unpoison unpoison pages\n"
720 " -h|--help Show this usage message\n"
722 " 0x10 bitfield format, e.g.\n"
723 " anon bit-name, e.g.\n"
724 " 0x10,anon comma-separated list, e.g.\n"
726 " N one page at offset N (unit: pages)\n"
727 " N+M pages range from N to N+M-1\n"
728 " N,M pages range from N to M-1\n"
729 " N, pages range from N to end\n"
730 " ,M pages range from 0 to M-1\n"
732 " bit1,bit2 (flags & (bit1|bit2)) != 0\n"
733 " bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1\n"
734 " bit1,~bit2 (flags & (bit1|bit2)) == bit1\n"
735 " =bit1,bit2 flags == (bit1|bit2)\n"
739 for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) {
740 if (!page_flag_names[i])
742 printf("%16s%s", page_flag_names[i] + 2,
743 page_flag_type(1ULL << i));
750 "(r) raw mode bits (o) overloaded bits\n");
753 static unsigned long long parse_number(const char *str)
755 unsigned long long n;
757 n = strtoll(str, NULL, 0);
759 if (n == 0 && str[0] != '0')
760 fatal("invalid name or number: %s\n", str);
765 static void parse_pid(const char *str)
770 opt_pid = parse_number(str);
772 sprintf(buf, "/proc/%d/pagemap", opt_pid);
773 pagemap_fd = checked_open(buf, O_RDONLY);
775 sprintf(buf, "/proc/%d/maps", opt_pid);
776 file = fopen(buf, "r");
782 while (fgets(buf, sizeof(buf), file) != NULL) {
783 unsigned long vm_start;
784 unsigned long vm_end;
785 unsigned long long pgoff;
791 n = sscanf(buf, "%lx-%lx %c%c%c%c %llx %x:%x %lu",
799 fprintf(stderr, "unexpected line: %s\n", buf);
802 pg_start[nr_vmas] = vm_start / page_size;
803 pg_end[nr_vmas] = vm_end / page_size;
804 if (++nr_vmas >= MAX_VMAS) {
805 fprintf(stderr, "too many VMAs\n");
812 static void show_file(const char *name, const struct stat *st)
814 unsigned long long size = st->st_size;
815 char atime[64], mtime[64];
816 long now = time(NULL);
818 printf("%s\tInode: %u\tSize: %llu (%llu pages)\n",
819 name, (unsigned)st->st_ino,
820 size, (size + page_size - 1) / page_size);
822 strftime(atime, sizeof(atime), "%c", localtime(&st->st_atime));
823 strftime(mtime, sizeof(mtime), "%c", localtime(&st->st_mtime));
825 printf("Modify: %s (%ld seconds ago)\nAccess: %s (%ld seconds ago)\n",
826 mtime, now - st->st_mtime,
827 atime, now - st->st_atime);
830 static sigjmp_buf sigbus_jmp;
832 static void * volatile sigbus_addr;
834 static void sigbus_handler(int sig, siginfo_t *info, void *ucontex)
838 sigbus_addr = info ? info->si_addr : NULL;
839 siglongjmp(sigbus_jmp, 1);
842 static struct sigaction sigbus_action = {
843 .sa_sigaction = sigbus_handler,
844 .sa_flags = SA_SIGINFO,
847 static void walk_file(const char *name, const struct stat *st)
849 uint8_t vec[PAGEMAP_BATCH];
850 uint64_t buf[PAGEMAP_BATCH], flags;
851 unsigned long nr_pages, pfn, i;
852 off_t off, end = st->st_size;
858 fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW);
860 for (off = 0; off < end; off += len) {
861 nr_pages = (end - off + page_size - 1) / page_size;
862 if (nr_pages > PAGEMAP_BATCH)
863 nr_pages = PAGEMAP_BATCH;
864 len = nr_pages * page_size;
866 ptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, off);
867 if (ptr == MAP_FAILED)
868 fatal("mmap failed: %s", name);
870 /* determine cached pages */
871 if (mincore(ptr, len, vec))
872 fatal("mincore failed: %s", name);
874 /* turn off readahead */
875 if (madvise(ptr, len, MADV_RANDOM))
876 fatal("madvice failed: %s", name);
878 if (sigsetjmp(sigbus_jmp, 1)) {
879 end = off + sigbus_addr ? sigbus_addr - ptr : 0;
880 fprintf(stderr, "got sigbus at offset %lld: %s\n",
881 (long long)end, name);
886 for (i = 0; i < nr_pages ; i++) {
888 (void)*(volatile int *)(ptr + i * page_size);
892 /* turn off harvesting reference bits */
893 if (madvise(ptr, len, MADV_SEQUENTIAL))
894 fatal("madvice failed: %s", name);
896 if (pagemap_read(buf, (unsigned long)ptr / page_size,
897 nr_pages) != nr_pages)
898 fatal("cannot read pagemap");
902 for (i = 0; i < nr_pages; i++) {
903 pfn = pagemap_pfn(buf[i]);
906 if (!kpageflags_read(&flags, pfn, 1))
908 if (first && opt_list) {
913 add_page(off / page_size + i, pfn, flags, buf[i]);
920 int walk_tree(const char *name, const struct stat *st, int type, struct FTW *f)
925 if (S_ISREG(st->st_mode))
929 fprintf(stderr, "cannot read dir: %s\n", name);
935 static void walk_page_cache(void)
939 kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY);
940 pagemap_fd = checked_open("/proc/self/pagemap", O_RDONLY);
941 sigaction(SIGBUS, &sigbus_action, NULL);
943 if (stat(opt_file, &st))
944 fatal("stat failed: %s\n", opt_file);
946 if (S_ISREG(st.st_mode)) {
947 walk_file(opt_file, &st);
948 } else if (S_ISDIR(st.st_mode)) {
949 /* do not follow symlinks and mountpoints */
950 if (nftw(opt_file, walk_tree, 64, FTW_MOUNT | FTW_PHYS) < 0)
951 fatal("nftw failed: %s\n", opt_file);
953 fatal("unhandled file type: %s\n", opt_file);
955 close(kpageflags_fd);
957 signal(SIGBUS, SIG_DFL);
960 static void parse_file(const char *name)
965 static void parse_addr_range(const char *optarg)
967 unsigned long offset;
971 p = strchr(optarg, ',');
973 p = strchr(optarg, '+');
977 size = parse_number(p + 1);
979 offset = parse_number(optarg);
983 size = parse_number(p + 1);
986 fatal("invalid range: %lu,%lu\n",
992 offset = parse_number(optarg);
996 add_addr_range(offset, size);
999 static void add_bits_filter(uint64_t mask, uint64_t bits)
1001 if (nr_bit_filters >= MAX_BIT_FILTERS)
1002 fatal("too much bit filters\n");
1004 opt_mask[nr_bit_filters] = mask;
1005 opt_bits[nr_bit_filters] = bits;
1009 static uint64_t parse_flag_name(const char *str, int len)
1016 if (len <= 8 && !strncmp(str, "compound", len))
1017 return BITS_COMPOUND;
1019 for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) {
1020 if (!page_flag_names[i])
1022 if (!strncmp(str, page_flag_names[i] + 2, len))
1026 return parse_number(str);
1029 static uint64_t parse_flag_names(const char *str, int all)
1031 const char *p = str;
1035 if (*p == ',' || *p == '=' || *p == '\0') {
1036 if ((*str != '~') || (*str == '~' && all && *++str))
1037 flags |= parse_flag_name(str, p - str);
1048 static void parse_bits_mask(const char *optarg)
1054 p = strchr(optarg, '=');
1056 mask = KPF_ALL_BITS;
1057 bits = parse_flag_names(p + 1, 0);
1059 mask = parse_flag_names(optarg, 0);
1060 bits = parse_flag_names(p + 1, 0);
1061 } else if (strchr(optarg, '~')) {
1062 mask = parse_flag_names(optarg, 1);
1063 bits = parse_flag_names(optarg, 0);
1065 mask = parse_flag_names(optarg, 0);
1066 bits = KPF_ALL_BITS;
1069 add_bits_filter(mask, bits);
1072 static void describe_flags(const char *optarg)
1074 uint64_t flags = parse_flag_names(optarg, 0);
1076 printf("0x%016llx\t%s\t%s\n",
1077 (unsigned long long)flags,
1078 page_flag_name(flags),
1079 page_flag_longname(flags));
1082 static const struct option opts[] = {
1083 { "raw" , 0, NULL, 'r' },
1084 { "pid" , 1, NULL, 'p' },
1085 { "file" , 1, NULL, 'f' },
1086 { "addr" , 1, NULL, 'a' },
1087 { "bits" , 1, NULL, 'b' },
1088 { "describe" , 1, NULL, 'd' },
1089 { "list" , 0, NULL, 'l' },
1090 { "list-each" , 0, NULL, 'L' },
1091 { "no-summary", 0, NULL, 'N' },
1092 { "hwpoison" , 0, NULL, 'X' },
1093 { "unpoison" , 0, NULL, 'x' },
1094 { "help" , 0, NULL, 'h' },
1095 { NULL , 0, NULL, 0 }
1098 int main(int argc, char *argv[])
1102 page_size = getpagesize();
1104 while ((c = getopt_long(argc, argv,
1105 "rp:f:a:b:d:lLNXxh", opts, NULL)) != -1) {
1117 parse_addr_range(optarg);
1120 parse_bits_mask(optarg);
1123 describe_flags(optarg);
1136 prepare_hwpoison_fd();
1140 prepare_hwpoison_fd();
1151 if (opt_list && opt_pid)
1152 printf("voffset\t");
1153 if (opt_list && opt_file)
1154 printf("foffset\t");
1156 printf("offset\tlen\tflags\n");
1158 printf("offset\tflags\n");