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Documentation/vm/page-types.c
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/* * page-types: Tool for querying page flags * |
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* This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; version 2. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should find a copy of v2 of the GNU General Public License somewhere on * your Linux system; if not, write to the Free Software Foundation, Inc., 59 * Temple Place, Suite 330, Boston, MA 02111-1307 USA. * |
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* Copyright (C) 2009 Intel corporation |
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* * Authors: Wu Fengguang <fengguang.wu@intel.com> |
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*/ |
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#define _LARGEFILE64_SOURCE |
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#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <stdint.h> #include <stdarg.h> #include <string.h> #include <getopt.h> #include <limits.h> |
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#include <assert.h> |
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#include <sys/types.h> #include <sys/errno.h> #include <sys/fcntl.h> |
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#include <sys/mount.h> #include <sys/statfs.h> #include "../../include/linux/magic.h" |
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#ifndef MAX_PATH # define MAX_PATH 256 #endif #ifndef STR # define _STR(x) #x # define STR(x) _STR(x) #endif |
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/* |
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* pagemap kernel ABI bits */ #define PM_ENTRY_BYTES sizeof(uint64_t) #define PM_STATUS_BITS 3 #define PM_STATUS_OFFSET (64 - PM_STATUS_BITS) #define PM_STATUS_MASK (((1LL << PM_STATUS_BITS) - 1) << PM_STATUS_OFFSET) #define PM_STATUS(nr) (((nr) << PM_STATUS_OFFSET) & PM_STATUS_MASK) #define PM_PSHIFT_BITS 6 #define PM_PSHIFT_OFFSET (PM_STATUS_OFFSET - PM_PSHIFT_BITS) #define PM_PSHIFT_MASK (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET) #define PM_PSHIFT(x) (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK) #define PM_PFRAME_MASK ((1LL << PM_PSHIFT_OFFSET) - 1) #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK) #define PM_PRESENT PM_STATUS(4LL) #define PM_SWAP PM_STATUS(2LL) /* |
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* kernel page flags */ #define KPF_BYTES 8 #define PROC_KPAGEFLAGS "/proc/kpageflags" /* copied from kpageflags_read() */ #define KPF_LOCKED 0 #define KPF_ERROR 1 #define KPF_REFERENCED 2 #define KPF_UPTODATE 3 #define KPF_DIRTY 4 #define KPF_LRU 5 #define KPF_ACTIVE 6 #define KPF_SLAB 7 #define KPF_WRITEBACK 8 #define KPF_RECLAIM 9 #define KPF_BUDDY 10 /* [11-20] new additions in 2.6.31 */ #define KPF_MMAP 11 #define KPF_ANON 12 #define KPF_SWAPCACHE 13 #define KPF_SWAPBACKED 14 #define KPF_COMPOUND_HEAD 15 #define KPF_COMPOUND_TAIL 16 #define KPF_HUGE 17 #define KPF_UNEVICTABLE 18 |
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#define KPF_HWPOISON 19 |
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#define KPF_NOPAGE 20 |
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#define KPF_KSM 21 |
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/* [32-] kernel hacking assistances */ #define KPF_RESERVED 32 #define KPF_MLOCKED 33 #define KPF_MAPPEDTODISK 34 #define KPF_PRIVATE 35 #define KPF_PRIVATE_2 36 #define KPF_OWNER_PRIVATE 37 #define KPF_ARCH 38 #define KPF_UNCACHED 39 /* [48-] take some arbitrary free slots for expanding overloaded flags * not part of kernel API */ #define KPF_READAHEAD 48 #define KPF_SLOB_FREE 49 #define KPF_SLUB_FROZEN 50 #define KPF_SLUB_DEBUG 51 #define KPF_ALL_BITS ((uint64_t)~0ULL) #define KPF_HACKERS_BITS (0xffffULL << 32) #define KPF_OVERLOADED_BITS (0xffffULL << 48) #define BIT(name) (1ULL << KPF_##name) #define BITS_COMPOUND (BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL)) |
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static const char *page_flag_names[] = { |
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[KPF_LOCKED] = "L:locked", [KPF_ERROR] = "E:error", [KPF_REFERENCED] = "R:referenced", [KPF_UPTODATE] = "U:uptodate", [KPF_DIRTY] = "D:dirty", [KPF_LRU] = "l:lru", [KPF_ACTIVE] = "A:active", [KPF_SLAB] = "S:slab", [KPF_WRITEBACK] = "W:writeback", [KPF_RECLAIM] = "I:reclaim", [KPF_BUDDY] = "B:buddy", [KPF_MMAP] = "M:mmap", [KPF_ANON] = "a:anonymous", [KPF_SWAPCACHE] = "s:swapcache", [KPF_SWAPBACKED] = "b:swapbacked", [KPF_COMPOUND_HEAD] = "H:compound_head", [KPF_COMPOUND_TAIL] = "T:compound_tail", [KPF_HUGE] = "G:huge", [KPF_UNEVICTABLE] = "u:unevictable", |
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[KPF_HWPOISON] = "X:hwpoison", |
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[KPF_NOPAGE] = "n:nopage", |
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[KPF_KSM] = "x:ksm", |
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[KPF_RESERVED] = "r:reserved", [KPF_MLOCKED] = "m:mlocked", [KPF_MAPPEDTODISK] = "d:mappedtodisk", [KPF_PRIVATE] = "P:private", [KPF_PRIVATE_2] = "p:private_2", [KPF_OWNER_PRIVATE] = "O:owner_private", [KPF_ARCH] = "h:arch", [KPF_UNCACHED] = "c:uncached", [KPF_READAHEAD] = "I:readahead", [KPF_SLOB_FREE] = "P:slob_free", [KPF_SLUB_FROZEN] = "A:slub_frozen", [KPF_SLUB_DEBUG] = "E:slub_debug", }; |
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static const char *debugfs_known_mountpoints[] = { "/sys/kernel/debug", "/debug", 0, }; |
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/* * data structures */ static int opt_raw; /* for kernel developers */ static int opt_list; /* list pages (in ranges) */ static int opt_no_summary; /* don't show summary */ static pid_t opt_pid; /* process to walk */ #define MAX_ADDR_RANGES 1024 static int nr_addr_ranges; static unsigned long opt_offset[MAX_ADDR_RANGES]; static unsigned long opt_size[MAX_ADDR_RANGES]; |
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#define MAX_VMAS 10240 static int nr_vmas; static unsigned long pg_start[MAX_VMAS]; static unsigned long pg_end[MAX_VMAS]; |
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#define MAX_BIT_FILTERS 64 static int nr_bit_filters; static uint64_t opt_mask[MAX_BIT_FILTERS]; static uint64_t opt_bits[MAX_BIT_FILTERS]; static int page_size; |
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static int pagemap_fd; |
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static int kpageflags_fd; |
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static int opt_hwpoison; static int opt_unpoison; |
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static char hwpoison_debug_fs[MAX_PATH+1]; |
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static int hwpoison_inject_fd; static int hwpoison_forget_fd; |
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#define HASH_SHIFT 13 #define HASH_SIZE (1 << HASH_SHIFT) #define HASH_MASK (HASH_SIZE - 1) #define HASH_KEY(flags) (flags & HASH_MASK) static unsigned long total_pages; static unsigned long nr_pages[HASH_SIZE]; static uint64_t page_flags[HASH_SIZE]; /* * helper functions */ #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) #define min_t(type, x, y) ({ \ type __min1 = (x); \ type __min2 = (y); \ __min1 < __min2 ? __min1 : __min2; }) |
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#define max_t(type, x, y) ({ \ type __max1 = (x); \ type __max2 = (y); \ __max1 > __max2 ? __max1 : __max2; }) |
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static unsigned long pages2mb(unsigned long pages) |
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{ return (pages * page_size) >> 20; } |
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static void fatal(const char *x, ...) |
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{ va_list ap; va_start(ap, x); vfprintf(stderr, x, ap); va_end(ap); exit(EXIT_FAILURE); } |
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static int checked_open(const char *pathname, int flags) |
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{ int fd = open(pathname, flags); if (fd < 0) { perror(pathname); exit(EXIT_FAILURE); } return fd; } |
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/* * pagemap/kpageflags routines */ static unsigned long do_u64_read(int fd, char *name, uint64_t *buf, unsigned long index, unsigned long count) { long bytes; if (index > ULONG_MAX / 8) fatal("index overflow: %lu ", index); if (lseek(fd, index * 8, SEEK_SET) < 0) { perror(name); exit(EXIT_FAILURE); } bytes = read(fd, buf, count * 8); if (bytes < 0) { perror(name); exit(EXIT_FAILURE); } if (bytes % 8) fatal("partial read: %lu bytes ", bytes); return bytes / 8; } static unsigned long kpageflags_read(uint64_t *buf, unsigned long index, unsigned long pages) { return do_u64_read(kpageflags_fd, PROC_KPAGEFLAGS, buf, index, pages); } static unsigned long pagemap_read(uint64_t *buf, unsigned long index, unsigned long pages) { return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages); } static unsigned long pagemap_pfn(uint64_t val) { unsigned long pfn; if (val & PM_PRESENT) pfn = PM_PFRAME(val); else pfn = 0; return pfn; } |
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/* * page flag names */ |
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static char *page_flag_name(uint64_t flags) |
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{ static char buf[65]; int present; int i, j; for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { present = (flags >> i) & 1; if (!page_flag_names[i]) { if (present) |
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fatal("unknown flag bit %d ", i); |
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continue; } buf[j++] = present ? page_flag_names[i][0] : '_'; } return buf; } |
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static char *page_flag_longname(uint64_t flags) |
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{ static char buf[1024]; int i, n; for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) { if (!page_flag_names[i]) continue; if ((flags >> i) & 1) n += snprintf(buf + n, sizeof(buf) - n, "%s,", page_flag_names[i] + 2); } if (n) n--; buf[n] = '\0'; return buf; } /* * page list and summary */ |
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static void show_page_range(unsigned long voffset, unsigned long offset, uint64_t flags) |
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{ static uint64_t flags0; |
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static unsigned long voff; |
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static unsigned long index; static unsigned long count; |
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if (flags == flags0 && offset == index + count && (!opt_pid || voffset == voff + count)) { |
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count++; return; } |
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if (count) { if (opt_pid) printf("%lx\t", voff); printf("%lx\t%lx\t%s ", |
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index, count, page_flag_name(flags0)); |
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} |
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flags0 = flags; index = offset; |
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voff = voffset; |
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count = 1; } |
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static void show_page(unsigned long voffset, unsigned long offset, uint64_t flags) |
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{ |
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if (opt_pid) printf("%lx\t", voffset); printf("%lx\t%s ", offset, page_flag_name(flags)); |
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} |
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static void show_summary(void) |
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{ int i; printf(" flags\tpage-count MB" " symbolic-flags\t\t\tlong-symbolic-flags "); for (i = 0; i < ARRAY_SIZE(nr_pages); i++) { if (nr_pages[i]) printf("0x%016llx\t%10lu %8lu %s\t%s ", (unsigned long long)page_flags[i], nr_pages[i], pages2mb(nr_pages[i]), page_flag_name(page_flags[i]), page_flag_longname(page_flags[i])); } printf(" total\t%10lu %8lu ", total_pages, pages2mb(total_pages)); } /* * page flag filters */ |
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static int bit_mask_ok(uint64_t flags) |
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{ int i; for (i = 0; i < nr_bit_filters; i++) { if (opt_bits[i] == KPF_ALL_BITS) { if ((flags & opt_mask[i]) == 0) return 0; } else { if ((flags & opt_mask[i]) != opt_bits[i]) return 0; } } return 1; } |
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static uint64_t expand_overloaded_flags(uint64_t flags) |
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{ /* SLOB/SLUB overload several page flags */ if (flags & BIT(SLAB)) { if (flags & BIT(PRIVATE)) flags ^= BIT(PRIVATE) | BIT(SLOB_FREE); if (flags & BIT(ACTIVE)) flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN); if (flags & BIT(ERROR)) flags ^= BIT(ERROR) | BIT(SLUB_DEBUG); } /* PG_reclaim is overloaded as PG_readahead in the read path */ if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM)) flags ^= BIT(RECLAIM) | BIT(READAHEAD); return flags; } |
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static uint64_t well_known_flags(uint64_t flags) |
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{ /* hide flags intended only for kernel hacker */ flags &= ~KPF_HACKERS_BITS; /* hide non-hugeTLB compound pages */ if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE))) flags &= ~BITS_COMPOUND; return flags; } |
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static uint64_t kpageflags_flags(uint64_t flags) { flags = expand_overloaded_flags(flags); if (!opt_raw) flags = well_known_flags(flags); return flags; } |
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/* verify that a mountpoint is actually a debugfs instance */ static int debugfs_valid_mountpoint(const char *debugfs) { struct statfs st_fs; if (statfs(debugfs, &st_fs) < 0) return -ENOENT; else if (st_fs.f_type != (long) DEBUGFS_MAGIC) return -ENOENT; return 0; } /* find the path to the mounted debugfs */ static const char *debugfs_find_mountpoint(void) { const char **ptr; char type[100]; FILE *fp; ptr = debugfs_known_mountpoints; while (*ptr) { if (debugfs_valid_mountpoint(*ptr) == 0) { strcpy(hwpoison_debug_fs, *ptr); return hwpoison_debug_fs; } ptr++; } /* give up and parse /proc/mounts */ fp = fopen("/proc/mounts", "r"); if (fp == NULL) perror("Can't open /proc/mounts for read"); while (fscanf(fp, "%*s %" STR(MAX_PATH) "s %99s %*s %*d %*d ", hwpoison_debug_fs, type) == 2) { if (strcmp(type, "debugfs") == 0) break; } fclose(fp); if (strcmp(type, "debugfs") != 0) return NULL; return hwpoison_debug_fs; } /* mount the debugfs somewhere if it's not mounted */ static void debugfs_mount(void) { const char **ptr; /* see if it's already mounted */ if (debugfs_find_mountpoint()) return; ptr = debugfs_known_mountpoints; while (*ptr) { if (mount(NULL, *ptr, "debugfs", 0, NULL) == 0) { /* save the mountpoint */ strcpy(hwpoison_debug_fs, *ptr); break; } ptr++; } if (*ptr == NULL) { perror("mount debugfs"); exit(EXIT_FAILURE); } } |
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/* |
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* page actions */ static void prepare_hwpoison_fd(void) { |
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char buf[MAX_PATH + 1]; debugfs_mount(); |
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if (opt_hwpoison && !hwpoison_inject_fd) { |
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snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn", hwpoison_debug_fs); |
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hwpoison_inject_fd = checked_open(buf, O_WRONLY); } if (opt_unpoison && !hwpoison_forget_fd) { |
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snprintf(buf, MAX_PATH, "%s/hwpoison/unpoison-pfn", hwpoison_debug_fs); |
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hwpoison_forget_fd = checked_open(buf, O_WRONLY); } } static int hwpoison_page(unsigned long offset) { char buf[100]; int len; len = sprintf(buf, "0x%lx ", offset); len = write(hwpoison_inject_fd, buf, len); if (len < 0) { perror("hwpoison inject"); return len; } return 0; } static int unpoison_page(unsigned long offset) { char buf[100]; int len; len = sprintf(buf, "0x%lx ", offset); len = write(hwpoison_forget_fd, buf, len); if (len < 0) { perror("hwpoison forget"); return len; } return 0; } /* |
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* page frame walker */ |
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static int hash_slot(uint64_t flags) |
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{ int k = HASH_KEY(flags); int i; /* Explicitly reserve slot 0 for flags 0: the following logic * cannot distinguish an unoccupied slot from slot (flags==0). */ if (flags == 0) return 0; /* search through the remaining (HASH_SIZE-1) slots */ for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) { if (!k || k >= ARRAY_SIZE(page_flags)) k = 1; if (page_flags[k] == 0) { page_flags[k] = flags; return k; } if (page_flags[k] == flags) return k; } fatal("hash table full: bump up HASH_SHIFT? "); exit(EXIT_FAILURE); } |
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static void add_page(unsigned long voffset, unsigned long offset, uint64_t flags) |
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{ |
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flags = kpageflags_flags(flags); |
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if (!bit_mask_ok(flags)) return; |
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if (opt_hwpoison) hwpoison_page(offset); if (opt_unpoison) unpoison_page(offset); |
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if (opt_list == 1) |
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show_page_range(voffset, offset, flags); |
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else if (opt_list == 2) |
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show_page(voffset, offset, flags); |
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nr_pages[hash_slot(flags)]++; total_pages++; } |
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#define KPAGEFLAGS_BATCH (64 << 10) /* 64k pages */ |
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static void walk_pfn(unsigned long voffset, unsigned long index, unsigned long count) |
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{ |
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uint64_t buf[KPAGEFLAGS_BATCH]; |
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unsigned long batch; |
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long pages; |
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unsigned long i; |
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while (count) { |
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batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH); pages = kpageflags_read(buf, index, batch); if (pages == 0) |
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break; |
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for (i = 0; i < pages; i++) |
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add_page(voffset + i, index + i, buf[i]); |
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index += pages; count -= pages; |
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} } |
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#define PAGEMAP_BATCH (64 << 10) static void walk_vma(unsigned long index, unsigned long count) |
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{ |
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uint64_t buf[PAGEMAP_BATCH]; unsigned long batch; unsigned long pages; unsigned long pfn; unsigned long i; |
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while (count) { batch = min_t(unsigned long, count, PAGEMAP_BATCH); pages = pagemap_read(buf, index, batch); if (pages == 0) break; |
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for (i = 0; i < pages; i++) { pfn = pagemap_pfn(buf[i]); |
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if (pfn) |
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walk_pfn(index + i, pfn, 1); |
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} index += pages; count -= pages; } |
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} static void walk_task(unsigned long index, unsigned long count) { |
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const unsigned long end = index + count; |
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unsigned long start; int i = 0; |
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while (index < end) { while (pg_end[i] <= index) if (++i >= nr_vmas) return; if (pg_start[i] >= end) return; |
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start = max_t(unsigned long, pg_start[i], index); index = min_t(unsigned long, pg_end[i], end); |
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705 706 |
assert(start < index); walk_vma(start, index - start); |
0b4b2ad53
|
707 708 709 710 711 712 713 714 715 716 717 718 719 |
} } static void add_addr_range(unsigned long offset, unsigned long size) { if (nr_addr_ranges >= MAX_ADDR_RANGES) fatal("too many addr ranges "); opt_offset[nr_addr_ranges] = offset; opt_size[nr_addr_ranges] = min_t(unsigned long, size, ULONG_MAX-offset); nr_addr_ranges++; } |
b7ed698cc
|
720 |
static void walk_addr_ranges(void) |
35efa5e99
|
721 722 |
{ int i; |
31bbf66ea
|
723 |
kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY); |
35efa5e99
|
724 725 |
if (!nr_addr_ranges) |
0b4b2ad53
|
726 |
add_addr_range(0, ULONG_MAX); |
35efa5e99
|
727 728 |
for (i = 0; i < nr_addr_ranges; i++) |
0b4b2ad53
|
729 |
if (!opt_pid) |
e577ebde9
|
730 |
walk_pfn(0, opt_offset[i], opt_size[i]); |
0b4b2ad53
|
731 732 |
else walk_task(opt_offset[i], opt_size[i]); |
35efa5e99
|
733 734 735 736 737 738 739 740 |
close(kpageflags_fd); } /* * user interface */ |
b7ed698cc
|
741 |
static const char *page_flag_type(uint64_t flag) |
35efa5e99
|
742 743 744 745 746 747 748 |
{ if (flag & KPF_HACKERS_BITS) return "(r)"; if (flag & KPF_OVERLOADED_BITS) return "(o)"; return " "; } |
b7ed698cc
|
749 |
static void usage(void) |
35efa5e99
|
750 751 752 753 754 755 |
{ int i, j; printf( "page-types [options] " |
9fdcd886a
|
756 757 |
" -r|--raw Raw mode, for kernel developers " |
dcfe730c6
|
758 759 |
" -d|--describe flags Describe flags " |
9fdcd886a
|
760 761 762 763 764 765 |
" -a|--addr addr-spec Walk a range of pages " " -b|--bits bits-spec Walk pages with specified bits " " -p|--pid pid Walk process address space " |
0b4b2ad53
|
766 |
#if 0 /* planned features */ |
9fdcd886a
|
767 768 |
" -f|--file filename Walk file address space " |
35efa5e99
|
769 |
#endif |
9fdcd886a
|
770 771 772 773 |
" -l|--list Show page details in ranges " " -L|--list-each Show page details one by one " |
c7825cfac
|
774 775 |
" -N|--no-summary Don't show summary info " |
9fdcd886a
|
776 777 778 779 780 781 |
" -X|--hwpoison hwpoison pages " " -x|--unpoison unpoison pages " " -h|--help Show this usage message " |
dcfe730c6
|
782 783 |
"flags: " |
9fdcd886a
|
784 785 786 787 788 789 |
" 0x10 bitfield format, e.g. " " anon bit-name, e.g. " " 0x10,anon comma-separated list, e.g. " |
35efa5e99
|
790 791 |
"addr-spec: " |
9fdcd886a
|
792 793 794 795 796 797 798 799 800 801 |
" N one page at offset N (unit: pages) " " N+M pages range from N to N+M-1 " " N,M pages range from N to M-1 " " N, pages range from N to end " " ,M pages range from 0 to M-1 " |
35efa5e99
|
802 803 |
"bits-spec: " |
9fdcd886a
|
804 805 806 807 808 809 810 811 |
" bit1,bit2 (flags & (bit1|bit2)) != 0 " " bit1,bit2=bit1 (flags & (bit1|bit2)) == bit1 " " bit1,~bit2 (flags & (bit1|bit2)) == bit1 " " =bit1,bit2 flags == (bit1|bit2) " |
35efa5e99
|
812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 |
"bit-names: " ); for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) { if (!page_flag_names[i]) continue; printf("%16s%s", page_flag_names[i] + 2, page_flag_type(1ULL << i)); if (++j > 3) { j = 0; putchar(' '); } } printf(" " "(r) raw mode bits (o) overloaded bits "); } |
b7ed698cc
|
832 |
static unsigned long long parse_number(const char *str) |
35efa5e99
|
833 834 835 836 837 838 839 840 841 842 843 |
{ unsigned long long n; n = strtoll(str, NULL, 0); if (n == 0 && str[0] != '0') fatal("invalid name or number: %s ", str); return n; } |
b7ed698cc
|
844 |
static void parse_pid(const char *str) |
35efa5e99
|
845 |
{ |
0b4b2ad53
|
846 847 |
FILE *file; char buf[5000]; |
35efa5e99
|
848 |
opt_pid = parse_number(str); |
35efa5e99
|
849 |
|
0b4b2ad53
|
850 |
sprintf(buf, "/proc/%d/pagemap", opt_pid); |
31bbf66ea
|
851 |
pagemap_fd = checked_open(buf, O_RDONLY); |
0b4b2ad53
|
852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 |
sprintf(buf, "/proc/%d/maps", opt_pid); file = fopen(buf, "r"); if (!file) { perror(buf); exit(EXIT_FAILURE); } while (fgets(buf, sizeof(buf), file) != NULL) { unsigned long vm_start; unsigned long vm_end; unsigned long long pgoff; int major, minor; char r, w, x, s; unsigned long ino; int n; n = sscanf(buf, "%lx-%lx %c%c%c%c %llx %x:%x %lu", &vm_start, &vm_end, &r, &w, &x, &s, &pgoff, &major, &minor, &ino); if (n < 10) { fprintf(stderr, "unexpected line: %s ", buf); continue; } pg_start[nr_vmas] = vm_start / page_size; pg_end[nr_vmas] = vm_end / page_size; if (++nr_vmas >= MAX_VMAS) { fprintf(stderr, "too many VMAs "); break; } } fclose(file); |
35efa5e99
|
890 |
} |
0b4b2ad53
|
891 |
static void parse_file(const char *name) |
35efa5e99
|
892 |
{ |
35efa5e99
|
893 |
} |
b7ed698cc
|
894 |
static void parse_addr_range(const char *optarg) |
35efa5e99
|
895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 |
{ unsigned long offset; unsigned long size; char *p; p = strchr(optarg, ','); if (!p) p = strchr(optarg, '+'); if (p == optarg) { offset = 0; size = parse_number(p + 1); } else if (p) { offset = parse_number(optarg); if (p[1] == '\0') size = ULONG_MAX; else { size = parse_number(p + 1); if (*p == ',') { if (size < offset) fatal("invalid range: %lu,%lu ", offset, size); size -= offset; } } } else { offset = parse_number(optarg); size = 1; } add_addr_range(offset, size); } |
b7ed698cc
|
928 |
static void add_bits_filter(uint64_t mask, uint64_t bits) |
35efa5e99
|
929 930 931 932 933 934 935 936 937 |
{ if (nr_bit_filters >= MAX_BIT_FILTERS) fatal("too much bit filters "); opt_mask[nr_bit_filters] = mask; opt_bits[nr_bit_filters] = bits; nr_bit_filters++; } |
b7ed698cc
|
938 |
static uint64_t parse_flag_name(const char *str, int len) |
35efa5e99
|
939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 |
{ int i; if (!*str || !len) return 0; if (len <= 8 && !strncmp(str, "compound", len)) return BITS_COMPOUND; for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) { if (!page_flag_names[i]) continue; if (!strncmp(str, page_flag_names[i] + 2, len)) return 1ULL << i; } return parse_number(str); } |
b7ed698cc
|
957 |
static uint64_t parse_flag_names(const char *str, int all) |
35efa5e99
|
958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 |
{ const char *p = str; uint64_t flags = 0; while (1) { if (*p == ',' || *p == '=' || *p == '\0') { if ((*str != '~') || (*str == '~' && all && *++str)) flags |= parse_flag_name(str, p - str); if (*p != ',') break; str = p + 1; } p++; } return flags; } |
b7ed698cc
|
975 |
static void parse_bits_mask(const char *optarg) |
35efa5e99
|
976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 |
{ uint64_t mask; uint64_t bits; const char *p; p = strchr(optarg, '='); if (p == optarg) { mask = KPF_ALL_BITS; bits = parse_flag_names(p + 1, 0); } else if (p) { mask = parse_flag_names(optarg, 0); bits = parse_flag_names(p + 1, 0); } else if (strchr(optarg, '~')) { mask = parse_flag_names(optarg, 1); bits = parse_flag_names(optarg, 0); } else { mask = parse_flag_names(optarg, 0); bits = KPF_ALL_BITS; } add_bits_filter(mask, bits); } |
dcfe730c6
|
998 999 1000 1001 1002 1003 1004 1005 1006 1007 |
static void describe_flags(const char *optarg) { uint64_t flags = parse_flag_names(optarg, 0); printf("0x%016llx\t%s\t%s ", (unsigned long long)flags, page_flag_name(flags), page_flag_longname(flags)); } |
35efa5e99
|
1008 |
|
3428838d8
|
1009 |
static const struct option opts[] = { |
35efa5e99
|
1010 1011 1012 1013 1014 |
{ "raw" , 0, NULL, 'r' }, { "pid" , 1, NULL, 'p' }, { "file" , 1, NULL, 'f' }, { "addr" , 1, NULL, 'a' }, { "bits" , 1, NULL, 'b' }, |
dcfe730c6
|
1015 |
{ "describe" , 1, NULL, 'd' }, |
35efa5e99
|
1016 1017 1018 |
{ "list" , 0, NULL, 'l' }, { "list-each" , 0, NULL, 'L' }, { "no-summary", 0, NULL, 'N' }, |
a54fed9f7
|
1019 1020 |
{ "hwpoison" , 0, NULL, 'X' }, { "unpoison" , 0, NULL, 'x' }, |
35efa5e99
|
1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 |
{ "help" , 0, NULL, 'h' }, { NULL , 0, NULL, 0 } }; int main(int argc, char *argv[]) { int c; page_size = getpagesize(); while ((c = getopt_long(argc, argv, |
dcfe730c6
|
1032 |
"rp:f:a:b:d:lLNXxh", opts, NULL)) != -1) { |
35efa5e99
|
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 |
switch (c) { case 'r': opt_raw = 1; break; case 'p': parse_pid(optarg); break; case 'f': parse_file(optarg); break; case 'a': parse_addr_range(optarg); break; case 'b': parse_bits_mask(optarg); break; |
dcfe730c6
|
1049 |
case 'd': |
dcfe730c6
|
1050 |
describe_flags(optarg); |
bb86a7338
|
1051 |
exit(0); |
35efa5e99
|
1052 1053 1054 1055 1056 1057 1058 1059 1060 |
case 'l': opt_list = 1; break; case 'L': opt_list = 2; break; case 'N': opt_no_summary = 1; break; |
a54fed9f7
|
1061 1062 1063 1064 1065 1066 1067 1068 |
case 'X': opt_hwpoison = 1; prepare_hwpoison_fd(); break; case 'x': opt_unpoison = 1; prepare_hwpoison_fd(); break; |
35efa5e99
|
1069 1070 1071 1072 1073 1074 1075 1076 |
case 'h': usage(); exit(0); default: usage(); exit(1); } } |
0b4b2ad53
|
1077 1078 |
if (opt_list && opt_pid) printf("voffset\t"); |
35efa5e99
|
1079 |
if (opt_list == 1) |
0b4b2ad53
|
1080 1081 |
printf("offset\tlen\tflags "); |
35efa5e99
|
1082 1083 1084 1085 1086 1087 1088 |
if (opt_list == 2) printf("offset\tflags "); walk_addr_ranges(); if (opt_list == 1) |
e577ebde9
|
1089 |
show_page_range(0, 0, 0); /* drain the buffer */ |
35efa5e99
|
1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 |
if (opt_no_summary) return 0; if (opt_list) printf(" "); show_summary(); return 0; } |