Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include <linux/mm.h> |
| 2 | #include <linux/hugetlb.h> |
| 3 | #include <linux/mount.h> |
| 4 | #include <linux/seq_file.h> |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 5 | #include <linux/highmem.h> |
Kees Cook | 5096add | 2007-05-08 00:26:04 -0700 | [diff] [blame] | 6 | #include <linux/ptrace.h> |
Christoph Lameter | 6e21c8f | 2005-09-03 15:54:45 -0700 | [diff] [blame] | 7 | #include <linux/pagemap.h> |
| 8 | #include <linux/mempolicy.h> |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 9 | #include <linux/swap.h> |
| 10 | #include <linux/swapops.h> |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <asm/elf.h> |
| 13 | #include <asm/uaccess.h> |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 14 | #include <asm/tlbflush.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include "internal.h" |
| 16 | |
Eric W. Biederman | df5f831 | 2008-02-08 04:18:33 -0800 | [diff] [blame] | 17 | void task_mem(struct seq_file *m, struct mm_struct *mm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | { |
| 19 | unsigned long data, text, lib; |
Hugh Dickins | 365e9c87 | 2005-10-29 18:16:18 -0700 | [diff] [blame] | 20 | unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss; |
| 21 | |
| 22 | /* |
| 23 | * Note: to minimize their overhead, mm maintains hiwater_vm and |
| 24 | * hiwater_rss only when about to *lower* total_vm or rss. Any |
| 25 | * collector of these hiwater stats must therefore get total_vm |
| 26 | * and rss too, which will usually be the higher. Barriers? not |
| 27 | * worth the effort, such snapshots can always be inconsistent. |
| 28 | */ |
| 29 | hiwater_vm = total_vm = mm->total_vm; |
| 30 | if (hiwater_vm < mm->hiwater_vm) |
| 31 | hiwater_vm = mm->hiwater_vm; |
| 32 | hiwater_rss = total_rss = get_mm_rss(mm); |
| 33 | if (hiwater_rss < mm->hiwater_rss) |
| 34 | hiwater_rss = mm->hiwater_rss; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | data = mm->total_vm - mm->shared_vm - mm->stack_vm; |
| 37 | text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10; |
| 38 | lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text; |
Eric W. Biederman | df5f831 | 2008-02-08 04:18:33 -0800 | [diff] [blame] | 39 | seq_printf(m, |
Hugh Dickins | 365e9c87 | 2005-10-29 18:16:18 -0700 | [diff] [blame] | 40 | "VmPeak:\t%8lu kB\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | "VmSize:\t%8lu kB\n" |
| 42 | "VmLck:\t%8lu kB\n" |
Hugh Dickins | 365e9c87 | 2005-10-29 18:16:18 -0700 | [diff] [blame] | 43 | "VmHWM:\t%8lu kB\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | "VmRSS:\t%8lu kB\n" |
| 45 | "VmData:\t%8lu kB\n" |
| 46 | "VmStk:\t%8lu kB\n" |
| 47 | "VmExe:\t%8lu kB\n" |
| 48 | "VmLib:\t%8lu kB\n" |
| 49 | "VmPTE:\t%8lu kB\n", |
Hugh Dickins | 365e9c87 | 2005-10-29 18:16:18 -0700 | [diff] [blame] | 50 | hiwater_vm << (PAGE_SHIFT-10), |
| 51 | (total_vm - mm->reserved_vm) << (PAGE_SHIFT-10), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | mm->locked_vm << (PAGE_SHIFT-10), |
Hugh Dickins | 365e9c87 | 2005-10-29 18:16:18 -0700 | [diff] [blame] | 53 | hiwater_rss << (PAGE_SHIFT-10), |
| 54 | total_rss << (PAGE_SHIFT-10), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | data << (PAGE_SHIFT-10), |
| 56 | mm->stack_vm << (PAGE_SHIFT-10), text, lib, |
| 57 | (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | } |
| 59 | |
| 60 | unsigned long task_vsize(struct mm_struct *mm) |
| 61 | { |
| 62 | return PAGE_SIZE * mm->total_vm; |
| 63 | } |
| 64 | |
| 65 | int task_statm(struct mm_struct *mm, int *shared, int *text, |
| 66 | int *data, int *resident) |
| 67 | { |
Hugh Dickins | 4294621 | 2005-10-29 18:16:05 -0700 | [diff] [blame] | 68 | *shared = get_mm_counter(mm, file_rss); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) |
| 70 | >> PAGE_SHIFT; |
| 71 | *data = mm->total_vm - mm->shared_vm; |
Hugh Dickins | 4294621 | 2005-10-29 18:16:05 -0700 | [diff] [blame] | 72 | *resident = *shared + get_mm_counter(mm, anon_rss); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | return mm->total_vm; |
| 74 | } |
| 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | static void pad_len_spaces(struct seq_file *m, int len) |
| 77 | { |
| 78 | len = 25 + sizeof(void*) * 6 - len; |
| 79 | if (len < 1) |
| 80 | len = 1; |
| 81 | seq_printf(m, "%*c", len, ' '); |
| 82 | } |
| 83 | |
Matt Mackall | a619879 | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 84 | static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma) |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 85 | { |
Matt Mackall | a619879 | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 86 | if (vma && vma != priv->tail_vma) { |
| 87 | struct mm_struct *mm = vma->vm_mm; |
| 88 | up_read(&mm->mmap_sem); |
| 89 | mmput(mm); |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | static void *m_start(struct seq_file *m, loff_t *pos) |
| 94 | { |
| 95 | struct proc_maps_private *priv = m->private; |
| 96 | unsigned long last_addr = m->version; |
| 97 | struct mm_struct *mm; |
| 98 | struct vm_area_struct *vma, *tail_vma = NULL; |
| 99 | loff_t l = *pos; |
| 100 | |
| 101 | /* Clear the per syscall fields in priv */ |
| 102 | priv->task = NULL; |
| 103 | priv->tail_vma = NULL; |
| 104 | |
| 105 | /* |
| 106 | * We remember last_addr rather than next_addr to hit with |
| 107 | * mmap_cache most of the time. We have zero last_addr at |
| 108 | * the beginning and also after lseek. We will have -1 last_addr |
| 109 | * after the end of the vmas. |
| 110 | */ |
| 111 | |
| 112 | if (last_addr == -1UL) |
| 113 | return NULL; |
| 114 | |
| 115 | priv->task = get_pid_task(priv->pid, PIDTYPE_PID); |
| 116 | if (!priv->task) |
| 117 | return NULL; |
| 118 | |
| 119 | mm = mm_for_maps(priv->task); |
| 120 | if (!mm) |
| 121 | return NULL; |
| 122 | |
| 123 | tail_vma = get_gate_vma(priv->task); |
| 124 | priv->tail_vma = tail_vma; |
| 125 | |
| 126 | /* Start with last addr hint */ |
| 127 | vma = find_vma(mm, last_addr); |
| 128 | if (last_addr && vma) { |
| 129 | vma = vma->vm_next; |
| 130 | goto out; |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * Check the vma index is within the range and do |
| 135 | * sequential scan until m_index. |
| 136 | */ |
| 137 | vma = NULL; |
| 138 | if ((unsigned long)l < mm->map_count) { |
| 139 | vma = mm->mmap; |
| 140 | while (l-- && vma) |
| 141 | vma = vma->vm_next; |
| 142 | goto out; |
| 143 | } |
| 144 | |
| 145 | if (l != mm->map_count) |
| 146 | tail_vma = NULL; /* After gate vma */ |
| 147 | |
| 148 | out: |
| 149 | if (vma) |
| 150 | return vma; |
| 151 | |
| 152 | /* End of vmas has been reached */ |
| 153 | m->version = (tail_vma != NULL)? 0: -1UL; |
| 154 | up_read(&mm->mmap_sem); |
| 155 | mmput(mm); |
| 156 | return tail_vma; |
| 157 | } |
| 158 | |
| 159 | static void *m_next(struct seq_file *m, void *v, loff_t *pos) |
| 160 | { |
| 161 | struct proc_maps_private *priv = m->private; |
| 162 | struct vm_area_struct *vma = v; |
| 163 | struct vm_area_struct *tail_vma = priv->tail_vma; |
| 164 | |
| 165 | (*pos)++; |
| 166 | if (vma && (vma != tail_vma) && vma->vm_next) |
| 167 | return vma->vm_next; |
| 168 | vma_stop(priv, vma); |
| 169 | return (vma != tail_vma)? tail_vma: NULL; |
| 170 | } |
| 171 | |
| 172 | static void m_stop(struct seq_file *m, void *v) |
| 173 | { |
| 174 | struct proc_maps_private *priv = m->private; |
| 175 | struct vm_area_struct *vma = v; |
| 176 | |
| 177 | vma_stop(priv, vma); |
| 178 | if (priv->task) |
| 179 | put_task_struct(priv->task); |
| 180 | } |
| 181 | |
| 182 | static int do_maps_open(struct inode *inode, struct file *file, |
Jan Engelhardt | 03a4482 | 2008-02-08 04:21:19 -0800 | [diff] [blame] | 183 | const struct seq_operations *ops) |
Matt Mackall | a619879 | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 184 | { |
| 185 | struct proc_maps_private *priv; |
| 186 | int ret = -ENOMEM; |
| 187 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
| 188 | if (priv) { |
| 189 | priv->pid = proc_pid(inode); |
| 190 | ret = seq_open(file, ops); |
| 191 | if (!ret) { |
| 192 | struct seq_file *m = file->private_data; |
| 193 | m->private = priv; |
| 194 | } else { |
| 195 | kfree(priv); |
| 196 | } |
| 197 | } |
| 198 | return ret; |
| 199 | } |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 200 | |
Matt Mackall | 4752c36 | 2008-02-04 22:29:02 -0800 | [diff] [blame] | 201 | static int show_map(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
Eric W. Biederman | 99f8955 | 2006-06-26 00:25:55 -0700 | [diff] [blame] | 203 | struct proc_maps_private *priv = m->private; |
| 204 | struct task_struct *task = priv->task; |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 205 | struct vm_area_struct *vma = v; |
| 206 | struct mm_struct *mm = vma->vm_mm; |
| 207 | struct file *file = vma->vm_file; |
| 208 | int flags = vma->vm_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | unsigned long ino = 0; |
| 210 | dev_t dev = 0; |
| 211 | int len; |
| 212 | |
Stephen Smalley | 006ebb4 | 2008-05-19 08:32:49 -0400 | [diff] [blame] | 213 | if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ)) |
Kees Cook | 5096add | 2007-05-08 00:26:04 -0700 | [diff] [blame] | 214 | return -EACCES; |
| 215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | if (file) { |
Josef "Jeff" Sipek | 2fddfee | 2006-12-08 02:36:36 -0800 | [diff] [blame] | 217 | struct inode *inode = vma->vm_file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | dev = inode->i_sb->s_dev; |
| 219 | ino = inode->i_ino; |
| 220 | } |
| 221 | |
| 222 | seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n", |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 223 | vma->vm_start, |
| 224 | vma->vm_end, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | flags & VM_READ ? 'r' : '-', |
| 226 | flags & VM_WRITE ? 'w' : '-', |
| 227 | flags & VM_EXEC ? 'x' : '-', |
| 228 | flags & VM_MAYSHARE ? 's' : 'p', |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 229 | vma->vm_pgoff << PAGE_SHIFT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | MAJOR(dev), MINOR(dev), ino, &len); |
| 231 | |
| 232 | /* |
| 233 | * Print the dentry name for named mappings, and a |
| 234 | * special [heap] marker for the heap: |
| 235 | */ |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 236 | if (file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | pad_len_spaces(m, len); |
Jan Blunck | c32c2f6 | 2008-02-14 19:38:43 -0800 | [diff] [blame] | 238 | seq_path(m, &file->f_path, "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | } else { |
Ingo Molnar | e6e5494 | 2006-06-27 02:53:50 -0700 | [diff] [blame] | 240 | const char *name = arch_vma_name(vma); |
| 241 | if (!name) { |
| 242 | if (mm) { |
| 243 | if (vma->vm_start <= mm->start_brk && |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 244 | vma->vm_end >= mm->brk) { |
Ingo Molnar | e6e5494 | 2006-06-27 02:53:50 -0700 | [diff] [blame] | 245 | name = "[heap]"; |
| 246 | } else if (vma->vm_start <= mm->start_stack && |
| 247 | vma->vm_end >= mm->start_stack) { |
| 248 | name = "[stack]"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | } |
Ingo Molnar | e6e5494 | 2006-06-27 02:53:50 -0700 | [diff] [blame] | 250 | } else { |
| 251 | name = "[vdso]"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | } |
Ingo Molnar | e6e5494 | 2006-06-27 02:53:50 -0700 | [diff] [blame] | 253 | } |
| 254 | if (name) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | pad_len_spaces(m, len); |
Ingo Molnar | e6e5494 | 2006-06-27 02:53:50 -0700 | [diff] [blame] | 256 | seq_puts(m, name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | } |
| 259 | seq_putc(m, '\n'); |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 260 | |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 261 | if (m->count < m->size) /* vma is copied successfully */ |
| 262 | m->version = (vma != get_gate_vma(task))? vma->vm_start: 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | return 0; |
| 264 | } |
| 265 | |
Jan Engelhardt | 03a4482 | 2008-02-08 04:21:19 -0800 | [diff] [blame] | 266 | static const struct seq_operations proc_pid_maps_op = { |
Matt Mackall | a619879 | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 267 | .start = m_start, |
| 268 | .next = m_next, |
| 269 | .stop = m_stop, |
| 270 | .show = show_map |
| 271 | }; |
| 272 | |
| 273 | static int maps_open(struct inode *inode, struct file *file) |
| 274 | { |
| 275 | return do_maps_open(inode, file, &proc_pid_maps_op); |
| 276 | } |
| 277 | |
| 278 | const struct file_operations proc_maps_operations = { |
| 279 | .open = maps_open, |
| 280 | .read = seq_read, |
| 281 | .llseek = seq_lseek, |
| 282 | .release = seq_release_private, |
| 283 | }; |
| 284 | |
| 285 | /* |
| 286 | * Proportional Set Size(PSS): my share of RSS. |
| 287 | * |
| 288 | * PSS of a process is the count of pages it has in memory, where each |
| 289 | * page is divided by the number of processes sharing it. So if a |
| 290 | * process has 1000 pages all to itself, and 1000 shared with one other |
| 291 | * process, its PSS will be 1500. |
| 292 | * |
| 293 | * To keep (accumulated) division errors low, we adopt a 64bit |
| 294 | * fixed-point pss counter to minimize division errors. So (pss >> |
| 295 | * PSS_SHIFT) would be the real byte count. |
| 296 | * |
| 297 | * A shift of 12 before division means (assuming 4K page size): |
| 298 | * - 1M 3-user-pages add up to 8KB errors; |
| 299 | * - supports mapcount up to 2^24, or 16M; |
| 300 | * - supports PSS up to 2^52 bytes, or 4PB. |
| 301 | */ |
| 302 | #define PSS_SHIFT 12 |
| 303 | |
Matt Mackall | 1e88328 | 2008-02-04 22:29:07 -0800 | [diff] [blame] | 304 | #ifdef CONFIG_PROC_PAGE_MONITOR |
Peter Zijlstra | 214e471 | 2008-04-28 02:12:55 -0700 | [diff] [blame] | 305 | struct mem_size_stats { |
Matt Mackall | a619879 | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 306 | struct vm_area_struct *vma; |
| 307 | unsigned long resident; |
| 308 | unsigned long shared_clean; |
| 309 | unsigned long shared_dirty; |
| 310 | unsigned long private_clean; |
| 311 | unsigned long private_dirty; |
| 312 | unsigned long referenced; |
Peter Zijlstra | 214e471 | 2008-04-28 02:12:55 -0700 | [diff] [blame] | 313 | unsigned long swap; |
Matt Mackall | a619879 | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 314 | u64 pss; |
| 315 | }; |
| 316 | |
Matt Mackall | b3ae5ac | 2008-02-04 22:29:01 -0800 | [diff] [blame] | 317 | static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 318 | struct mm_walk *walk) |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 319 | { |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 320 | struct mem_size_stats *mss = walk->private; |
Matt Mackall | b3ae5ac | 2008-02-04 22:29:01 -0800 | [diff] [blame] | 321 | struct vm_area_struct *vma = mss->vma; |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 322 | pte_t *pte, ptent; |
Hugh Dickins | 705e87c | 2005-10-29 18:16:27 -0700 | [diff] [blame] | 323 | spinlock_t *ptl; |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 324 | struct page *page; |
Fengguang Wu | ec4dd3e | 2008-02-04 22:28:56 -0800 | [diff] [blame] | 325 | int mapcount; |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 326 | |
Hugh Dickins | 705e87c | 2005-10-29 18:16:27 -0700 | [diff] [blame] | 327 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
David Rientjes | 826fad1 | 2007-05-06 14:49:21 -0700 | [diff] [blame] | 328 | for (; addr != end; pte++, addr += PAGE_SIZE) { |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 329 | ptent = *pte; |
Peter Zijlstra | 214e471 | 2008-04-28 02:12:55 -0700 | [diff] [blame] | 330 | |
| 331 | if (is_swap_pte(ptent)) { |
| 332 | mss->swap += PAGE_SIZE; |
| 333 | continue; |
| 334 | } |
| 335 | |
Hugh Dickins | 705e87c | 2005-10-29 18:16:27 -0700 | [diff] [blame] | 336 | if (!pte_present(ptent)) |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 337 | continue; |
| 338 | |
| 339 | mss->resident += PAGE_SIZE; |
Nick Piggin | ad820c5 | 2006-03-06 15:42:58 -0800 | [diff] [blame] | 340 | |
| 341 | page = vm_normal_page(vma, addr, ptent); |
| 342 | if (!page) |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 343 | continue; |
| 344 | |
David Rientjes | f79f177 | 2007-05-06 14:49:22 -0700 | [diff] [blame] | 345 | /* Accumulate the size in pages that have been accessed. */ |
| 346 | if (pte_young(ptent) || PageReferenced(page)) |
| 347 | mss->referenced += PAGE_SIZE; |
Fengguang Wu | ec4dd3e | 2008-02-04 22:28:56 -0800 | [diff] [blame] | 348 | mapcount = page_mapcount(page); |
| 349 | if (mapcount >= 2) { |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 350 | if (pte_dirty(ptent)) |
| 351 | mss->shared_dirty += PAGE_SIZE; |
| 352 | else |
| 353 | mss->shared_clean += PAGE_SIZE; |
Fengguang Wu | ec4dd3e | 2008-02-04 22:28:56 -0800 | [diff] [blame] | 354 | mss->pss += (PAGE_SIZE << PSS_SHIFT) / mapcount; |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 355 | } else { |
| 356 | if (pte_dirty(ptent)) |
| 357 | mss->private_dirty += PAGE_SIZE; |
| 358 | else |
| 359 | mss->private_clean += PAGE_SIZE; |
Fengguang Wu | ec4dd3e | 2008-02-04 22:28:56 -0800 | [diff] [blame] | 360 | mss->pss += (PAGE_SIZE << PSS_SHIFT); |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 361 | } |
David Rientjes | 826fad1 | 2007-05-06 14:49:21 -0700 | [diff] [blame] | 362 | } |
Hugh Dickins | 705e87c | 2005-10-29 18:16:27 -0700 | [diff] [blame] | 363 | pte_unmap_unlock(pte - 1, ptl); |
| 364 | cond_resched(); |
Matt Mackall | b3ae5ac | 2008-02-04 22:29:01 -0800 | [diff] [blame] | 365 | return 0; |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 368 | static int show_smap(struct seq_file *m, void *v) |
| 369 | { |
| 370 | struct vm_area_struct *vma = v; |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 371 | struct mem_size_stats mss; |
Matt Mackall | 4752c36 | 2008-02-04 22:29:02 -0800 | [diff] [blame] | 372 | int ret; |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 373 | struct mm_walk smaps_walk = { |
| 374 | .pmd_entry = smaps_pte_range, |
| 375 | .mm = vma->vm_mm, |
| 376 | .private = &mss, |
| 377 | }; |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 378 | |
| 379 | memset(&mss, 0, sizeof mss); |
Matt Mackall | b3ae5ac | 2008-02-04 22:29:01 -0800 | [diff] [blame] | 380 | mss.vma = vma; |
Nick Piggin | 5ddfae1 | 2006-03-06 15:42:57 -0800 | [diff] [blame] | 381 | if (vma->vm_mm && !is_vm_hugetlb_page(vma)) |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 382 | walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk); |
Matt Mackall | 4752c36 | 2008-02-04 22:29:02 -0800 | [diff] [blame] | 383 | |
| 384 | ret = show_map(m, v); |
| 385 | if (ret) |
| 386 | return ret; |
| 387 | |
| 388 | seq_printf(m, |
| 389 | "Size: %8lu kB\n" |
| 390 | "Rss: %8lu kB\n" |
| 391 | "Pss: %8lu kB\n" |
| 392 | "Shared_Clean: %8lu kB\n" |
| 393 | "Shared_Dirty: %8lu kB\n" |
| 394 | "Private_Clean: %8lu kB\n" |
| 395 | "Private_Dirty: %8lu kB\n" |
Peter Zijlstra | 214e471 | 2008-04-28 02:12:55 -0700 | [diff] [blame] | 396 | "Referenced: %8lu kB\n" |
| 397 | "Swap: %8lu kB\n", |
Matt Mackall | 4752c36 | 2008-02-04 22:29:02 -0800 | [diff] [blame] | 398 | (vma->vm_end - vma->vm_start) >> 10, |
| 399 | mss.resident >> 10, |
| 400 | (unsigned long)(mss.pss >> (10 + PSS_SHIFT)), |
| 401 | mss.shared_clean >> 10, |
| 402 | mss.shared_dirty >> 10, |
| 403 | mss.private_clean >> 10, |
| 404 | mss.private_dirty >> 10, |
Peter Zijlstra | 214e471 | 2008-04-28 02:12:55 -0700 | [diff] [blame] | 405 | mss.referenced >> 10, |
| 406 | mss.swap >> 10); |
Matt Mackall | 4752c36 | 2008-02-04 22:29:02 -0800 | [diff] [blame] | 407 | |
| 408 | return ret; |
Mauricio Lin | e070ad4 | 2005-09-03 15:55:10 -0700 | [diff] [blame] | 409 | } |
| 410 | |
Jan Engelhardt | 03a4482 | 2008-02-08 04:21:19 -0800 | [diff] [blame] | 411 | static const struct seq_operations proc_pid_smaps_op = { |
Matt Mackall | a619879 | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 412 | .start = m_start, |
| 413 | .next = m_next, |
| 414 | .stop = m_stop, |
| 415 | .show = show_smap |
| 416 | }; |
| 417 | |
| 418 | static int smaps_open(struct inode *inode, struct file *file) |
| 419 | { |
| 420 | return do_maps_open(inode, file, &proc_pid_smaps_op); |
| 421 | } |
| 422 | |
| 423 | const struct file_operations proc_smaps_operations = { |
| 424 | .open = smaps_open, |
| 425 | .read = seq_read, |
| 426 | .llseek = seq_lseek, |
| 427 | .release = seq_release_private, |
| 428 | }; |
| 429 | |
| 430 | static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr, |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 431 | unsigned long end, struct mm_walk *walk) |
Matt Mackall | a619879 | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 432 | { |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 433 | struct vm_area_struct *vma = walk->private; |
Matt Mackall | a619879 | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 434 | pte_t *pte, ptent; |
| 435 | spinlock_t *ptl; |
| 436 | struct page *page; |
| 437 | |
| 438 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
| 439 | for (; addr != end; pte++, addr += PAGE_SIZE) { |
| 440 | ptent = *pte; |
| 441 | if (!pte_present(ptent)) |
| 442 | continue; |
| 443 | |
| 444 | page = vm_normal_page(vma, addr, ptent); |
| 445 | if (!page) |
| 446 | continue; |
| 447 | |
| 448 | /* Clear accessed and referenced bits. */ |
| 449 | ptep_test_and_clear_young(vma, addr, pte); |
| 450 | ClearPageReferenced(page); |
| 451 | } |
| 452 | pte_unmap_unlock(pte - 1, ptl); |
| 453 | cond_resched(); |
| 454 | return 0; |
| 455 | } |
| 456 | |
Matt Mackall | f248dcb | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 457 | static ssize_t clear_refs_write(struct file *file, const char __user *buf, |
| 458 | size_t count, loff_t *ppos) |
David Rientjes | b813e93 | 2007-05-06 14:49:24 -0700 | [diff] [blame] | 459 | { |
Matt Mackall | f248dcb | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 460 | struct task_struct *task; |
| 461 | char buffer[PROC_NUMBUF], *end; |
| 462 | struct mm_struct *mm; |
David Rientjes | b813e93 | 2007-05-06 14:49:24 -0700 | [diff] [blame] | 463 | struct vm_area_struct *vma; |
| 464 | |
Matt Mackall | f248dcb | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 465 | memset(buffer, 0, sizeof(buffer)); |
| 466 | if (count > sizeof(buffer) - 1) |
| 467 | count = sizeof(buffer) - 1; |
| 468 | if (copy_from_user(buffer, buf, count)) |
| 469 | return -EFAULT; |
| 470 | if (!simple_strtol(buffer, &end, 0)) |
| 471 | return -EINVAL; |
| 472 | if (*end == '\n') |
| 473 | end++; |
| 474 | task = get_proc_task(file->f_path.dentry->d_inode); |
| 475 | if (!task) |
| 476 | return -ESRCH; |
| 477 | mm = get_task_mm(task); |
| 478 | if (mm) { |
Andrew Morton | 20cbc97 | 2008-07-05 12:29:05 -0700 | [diff] [blame] | 479 | struct mm_walk clear_refs_walk = { |
| 480 | .pmd_entry = clear_refs_pte_range, |
| 481 | .mm = mm, |
| 482 | }; |
Matt Mackall | f248dcb | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 483 | down_read(&mm->mmap_sem); |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 484 | for (vma = mm->mmap; vma; vma = vma->vm_next) { |
| 485 | clear_refs_walk.private = vma; |
Matt Mackall | f248dcb | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 486 | if (!is_vm_hugetlb_page(vma)) |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 487 | walk_page_range(vma->vm_start, vma->vm_end, |
| 488 | &clear_refs_walk); |
| 489 | } |
Matt Mackall | f248dcb | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 490 | flush_tlb_mm(mm); |
| 491 | up_read(&mm->mmap_sem); |
| 492 | mmput(mm); |
| 493 | } |
| 494 | put_task_struct(task); |
| 495 | if (end - buffer == 0) |
| 496 | return -EIO; |
| 497 | return end - buffer; |
David Rientjes | b813e93 | 2007-05-06 14:49:24 -0700 | [diff] [blame] | 498 | } |
| 499 | |
Matt Mackall | f248dcb | 2008-02-04 22:29:03 -0800 | [diff] [blame] | 500 | const struct file_operations proc_clear_refs_operations = { |
| 501 | .write = clear_refs_write, |
| 502 | }; |
| 503 | |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 504 | struct pagemapread { |
Thomas Tuttle | aae8679 | 2008-06-05 22:46:31 -0700 | [diff] [blame] | 505 | u64 __user *out, *end; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 506 | }; |
| 507 | |
Hans Rosenfeld | f16278c | 2008-03-21 18:46:59 -0500 | [diff] [blame] | 508 | #define PM_ENTRY_BYTES sizeof(u64) |
| 509 | #define PM_STATUS_BITS 3 |
| 510 | #define PM_STATUS_OFFSET (64 - PM_STATUS_BITS) |
| 511 | #define PM_STATUS_MASK (((1LL << PM_STATUS_BITS) - 1) << PM_STATUS_OFFSET) |
| 512 | #define PM_STATUS(nr) (((nr) << PM_STATUS_OFFSET) & PM_STATUS_MASK) |
| 513 | #define PM_PSHIFT_BITS 6 |
| 514 | #define PM_PSHIFT_OFFSET (PM_STATUS_OFFSET - PM_PSHIFT_BITS) |
| 515 | #define PM_PSHIFT_MASK (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET) |
| 516 | #define PM_PSHIFT(x) (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK) |
| 517 | #define PM_PFRAME_MASK ((1LL << PM_PSHIFT_OFFSET) - 1) |
| 518 | #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK) |
| 519 | |
| 520 | #define PM_PRESENT PM_STATUS(4LL) |
| 521 | #define PM_SWAP PM_STATUS(2LL) |
| 522 | #define PM_NOT_PRESENT PM_PSHIFT(PAGE_SHIFT) |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 523 | #define PM_END_OF_BUFFER 1 |
| 524 | |
| 525 | static int add_to_pagemap(unsigned long addr, u64 pfn, |
| 526 | struct pagemapread *pm) |
| 527 | { |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 528 | if (put_user(pfn, pm->out)) |
| 529 | return -EFAULT; |
Thomas Tuttle | aae8679 | 2008-06-05 22:46:31 -0700 | [diff] [blame] | 530 | pm->out++; |
| 531 | if (pm->out >= pm->end) |
| 532 | return PM_END_OF_BUFFER; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 533 | return 0; |
| 534 | } |
| 535 | |
| 536 | static int pagemap_pte_hole(unsigned long start, unsigned long end, |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 537 | struct mm_walk *walk) |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 538 | { |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 539 | struct pagemapread *pm = walk->private; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 540 | unsigned long addr; |
| 541 | int err = 0; |
| 542 | for (addr = start; addr < end; addr += PAGE_SIZE) { |
| 543 | err = add_to_pagemap(addr, PM_NOT_PRESENT, pm); |
| 544 | if (err) |
| 545 | break; |
| 546 | } |
| 547 | return err; |
| 548 | } |
| 549 | |
Adrian Bunk | 9d02dbc | 2008-04-28 02:12:11 -0700 | [diff] [blame] | 550 | static u64 swap_pte_to_pagemap_entry(pte_t pte) |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 551 | { |
| 552 | swp_entry_t e = pte_to_swp_entry(pte); |
Hans Rosenfeld | f16278c | 2008-03-21 18:46:59 -0500 | [diff] [blame] | 553 | return swp_type(e) | (swp_offset(e) << MAX_SWAPFILES_SHIFT); |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 554 | } |
| 555 | |
Dave Hansen | bcf8039 | 2008-06-12 15:21:48 -0700 | [diff] [blame] | 556 | static unsigned long pte_to_pagemap_entry(pte_t pte) |
| 557 | { |
| 558 | unsigned long pme = 0; |
| 559 | if (is_swap_pte(pte)) |
| 560 | pme = PM_PFRAME(swap_pte_to_pagemap_entry(pte)) |
| 561 | | PM_PSHIFT(PAGE_SHIFT) | PM_SWAP; |
| 562 | else if (pte_present(pte)) |
| 563 | pme = PM_PFRAME(pte_pfn(pte)) |
| 564 | | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT; |
| 565 | return pme; |
| 566 | } |
| 567 | |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 568 | static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 569 | struct mm_walk *walk) |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 570 | { |
Dave Hansen | bcf8039 | 2008-06-12 15:21:48 -0700 | [diff] [blame] | 571 | struct vm_area_struct *vma; |
Dave Hansen | 2165009 | 2008-06-12 15:21:47 -0700 | [diff] [blame] | 572 | struct pagemapread *pm = walk->private; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 573 | pte_t *pte; |
| 574 | int err = 0; |
| 575 | |
Dave Hansen | bcf8039 | 2008-06-12 15:21:48 -0700 | [diff] [blame] | 576 | /* find the first VMA at or above 'addr' */ |
| 577 | vma = find_vma(walk->mm, addr); |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 578 | for (; addr != end; addr += PAGE_SIZE) { |
| 579 | u64 pfn = PM_NOT_PRESENT; |
Dave Hansen | bcf8039 | 2008-06-12 15:21:48 -0700 | [diff] [blame] | 580 | |
| 581 | /* check to see if we've left 'vma' behind |
| 582 | * and need a new, higher one */ |
| 583 | if (vma && (addr >= vma->vm_end)) |
| 584 | vma = find_vma(walk->mm, addr); |
| 585 | |
| 586 | /* check that 'vma' actually covers this address, |
| 587 | * and that it isn't a huge page vma */ |
| 588 | if (vma && (vma->vm_start <= addr) && |
| 589 | !is_vm_hugetlb_page(vma)) { |
| 590 | pte = pte_offset_map(pmd, addr); |
| 591 | pfn = pte_to_pagemap_entry(*pte); |
| 592 | /* unmap before userspace copy */ |
| 593 | pte_unmap(pte); |
| 594 | } |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 595 | err = add_to_pagemap(addr, pfn, pm); |
| 596 | if (err) |
| 597 | return err; |
| 598 | } |
| 599 | |
| 600 | cond_resched(); |
| 601 | |
| 602 | return err; |
| 603 | } |
| 604 | |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 605 | /* |
| 606 | * /proc/pid/pagemap - an array mapping virtual pages to pfns |
| 607 | * |
Hans Rosenfeld | f16278c | 2008-03-21 18:46:59 -0500 | [diff] [blame] | 608 | * For each page in the address space, this file contains one 64-bit entry |
| 609 | * consisting of the following: |
| 610 | * |
| 611 | * Bits 0-55 page frame number (PFN) if present |
| 612 | * Bits 0-4 swap type if swapped |
| 613 | * Bits 5-55 swap offset if swapped |
| 614 | * Bits 55-60 page shift (page size = 1<<page shift) |
| 615 | * Bit 61 reserved for future use |
| 616 | * Bit 62 page swapped |
| 617 | * Bit 63 page present |
| 618 | * |
| 619 | * If the page is not present but in swap, then the PFN contains an |
| 620 | * encoding of the swap file number and the page's offset into the |
| 621 | * swap. Unmapped pages return a null PFN. This allows determining |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 622 | * precisely which pages are mapped (or in swap) and comparing mapped |
| 623 | * pages between processes. |
| 624 | * |
| 625 | * Efficient users of this interface will use /proc/pid/maps to |
| 626 | * determine which areas of memory are actually mapped and llseek to |
| 627 | * skip over unmapped regions. |
| 628 | */ |
| 629 | static ssize_t pagemap_read(struct file *file, char __user *buf, |
| 630 | size_t count, loff_t *ppos) |
| 631 | { |
| 632 | struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode); |
| 633 | struct page **pages, *page; |
| 634 | unsigned long uaddr, uend; |
| 635 | struct mm_struct *mm; |
| 636 | struct pagemapread pm; |
| 637 | int pagecount; |
| 638 | int ret = -ESRCH; |
Alexey Dobriyan | ee1e6ab | 2008-07-21 14:21:36 -0700 | [diff] [blame] | 639 | struct mm_walk pagemap_walk = {}; |
Andrew Morton | 5d7e0d2 | 2008-07-05 01:02:01 -0700 | [diff] [blame] | 640 | unsigned long src; |
| 641 | unsigned long svpfn; |
| 642 | unsigned long start_vaddr; |
| 643 | unsigned long end_vaddr; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 644 | |
| 645 | if (!task) |
| 646 | goto out; |
| 647 | |
| 648 | ret = -EACCES; |
Stephen Smalley | 006ebb4 | 2008-05-19 08:32:49 -0400 | [diff] [blame] | 649 | if (!ptrace_may_access(task, PTRACE_MODE_READ)) |
Marcelo Tosatti | fb39380 | 2008-03-13 12:32:35 -0700 | [diff] [blame] | 650 | goto out_task; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 651 | |
| 652 | ret = -EINVAL; |
| 653 | /* file position must be aligned */ |
Thomas Tuttle | aae8679 | 2008-06-05 22:46:31 -0700 | [diff] [blame] | 654 | if ((*ppos % PM_ENTRY_BYTES) || (count % PM_ENTRY_BYTES)) |
Marcelo Tosatti | fb39380 | 2008-03-13 12:32:35 -0700 | [diff] [blame] | 655 | goto out_task; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 656 | |
| 657 | ret = 0; |
| 658 | mm = get_task_mm(task); |
| 659 | if (!mm) |
Marcelo Tosatti | fb39380 | 2008-03-13 12:32:35 -0700 | [diff] [blame] | 660 | goto out_task; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 661 | |
Andrew Morton | 5d7e0d2 | 2008-07-05 01:02:01 -0700 | [diff] [blame] | 662 | |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 663 | uaddr = (unsigned long)buf & PAGE_MASK; |
| 664 | uend = (unsigned long)(buf + count); |
| 665 | pagecount = (PAGE_ALIGN(uend) - uaddr) / PAGE_SIZE; |
Andrew Morton | 5d7e0d2 | 2008-07-05 01:02:01 -0700 | [diff] [blame] | 666 | ret = 0; |
| 667 | if (pagecount == 0) |
| 668 | goto out_mm; |
| 669 | pages = kcalloc(pagecount, sizeof(struct page *), GFP_KERNEL); |
| 670 | ret = -ENOMEM; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 671 | if (!pages) |
Marcelo Tosatti | fb39380 | 2008-03-13 12:32:35 -0700 | [diff] [blame] | 672 | goto out_mm; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 673 | |
| 674 | down_read(¤t->mm->mmap_sem); |
| 675 | ret = get_user_pages(current, current->mm, uaddr, pagecount, |
| 676 | 1, 0, pages, NULL); |
| 677 | up_read(¤t->mm->mmap_sem); |
| 678 | |
| 679 | if (ret < 0) |
| 680 | goto out_free; |
| 681 | |
Marcelo Tosatti | fb39380 | 2008-03-13 12:32:35 -0700 | [diff] [blame] | 682 | if (ret != pagecount) { |
| 683 | pagecount = ret; |
| 684 | ret = -EFAULT; |
| 685 | goto out_pages; |
| 686 | } |
| 687 | |
Thomas Tuttle | aae8679 | 2008-06-05 22:46:31 -0700 | [diff] [blame] | 688 | pm.out = (u64 *)buf; |
| 689 | pm.end = (u64 *)(buf + count); |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 690 | |
Andrew Morton | 5d7e0d2 | 2008-07-05 01:02:01 -0700 | [diff] [blame] | 691 | pagemap_walk.pmd_entry = pagemap_pte_range; |
| 692 | pagemap_walk.pte_hole = pagemap_pte_hole; |
| 693 | pagemap_walk.mm = mm; |
| 694 | pagemap_walk.private = ± |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 695 | |
Andrew Morton | 5d7e0d2 | 2008-07-05 01:02:01 -0700 | [diff] [blame] | 696 | src = *ppos; |
| 697 | svpfn = src / PM_ENTRY_BYTES; |
| 698 | start_vaddr = svpfn << PAGE_SHIFT; |
| 699 | end_vaddr = TASK_SIZE_OF(task); |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 700 | |
Andrew Morton | 5d7e0d2 | 2008-07-05 01:02:01 -0700 | [diff] [blame] | 701 | /* watch out for wraparound */ |
| 702 | if (svpfn > TASK_SIZE_OF(task) >> PAGE_SHIFT) |
| 703 | start_vaddr = end_vaddr; |
| 704 | |
| 705 | /* |
| 706 | * The odds are that this will stop walking way |
| 707 | * before end_vaddr, because the length of the |
| 708 | * user buffer is tracked in "pm", and the walk |
| 709 | * will stop when we hit the end of the buffer. |
| 710 | */ |
| 711 | ret = walk_page_range(start_vaddr, end_vaddr, &pagemap_walk); |
| 712 | if (ret == PM_END_OF_BUFFER) |
| 713 | ret = 0; |
| 714 | /* don't need mmap_sem for these, but this looks cleaner */ |
| 715 | *ppos += (char *)pm.out - buf; |
| 716 | if (!ret) |
| 717 | ret = (char *)pm.out - buf; |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 718 | |
Marcelo Tosatti | fb39380 | 2008-03-13 12:32:35 -0700 | [diff] [blame] | 719 | out_pages: |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 720 | for (; pagecount; pagecount--) { |
| 721 | page = pages[pagecount-1]; |
| 722 | if (!PageReserved(page)) |
| 723 | SetPageDirty(page); |
| 724 | page_cache_release(page); |
| 725 | } |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 726 | out_free: |
| 727 | kfree(pages); |
Marcelo Tosatti | fb39380 | 2008-03-13 12:32:35 -0700 | [diff] [blame] | 728 | out_mm: |
| 729 | mmput(mm); |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 730 | out_task: |
| 731 | put_task_struct(task); |
| 732 | out: |
| 733 | return ret; |
| 734 | } |
| 735 | |
| 736 | const struct file_operations proc_pagemap_operations = { |
| 737 | .llseek = mem_lseek, /* borrow this */ |
| 738 | .read = pagemap_read, |
| 739 | }; |
Matt Mackall | 1e88328 | 2008-02-04 22:29:07 -0800 | [diff] [blame] | 740 | #endif /* CONFIG_PROC_PAGE_MONITOR */ |
Matt Mackall | 85863e4 | 2008-02-04 22:29:04 -0800 | [diff] [blame] | 741 | |
Christoph Lameter | 6e21c8f | 2005-09-03 15:54:45 -0700 | [diff] [blame] | 742 | #ifdef CONFIG_NUMA |
Christoph Lameter | 1a75a6c | 2006-01-08 01:01:02 -0800 | [diff] [blame] | 743 | extern int show_numa_map(struct seq_file *m, void *v); |
Christoph Lameter | 6e21c8f | 2005-09-03 15:54:45 -0700 | [diff] [blame] | 744 | |
Kees Cook | 5096add | 2007-05-08 00:26:04 -0700 | [diff] [blame] | 745 | static int show_numa_map_checked(struct seq_file *m, void *v) |
| 746 | { |
| 747 | struct proc_maps_private *priv = m->private; |
| 748 | struct task_struct *task = priv->task; |
| 749 | |
Stephen Smalley | 006ebb4 | 2008-05-19 08:32:49 -0400 | [diff] [blame] | 750 | if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ)) |
Kees Cook | 5096add | 2007-05-08 00:26:04 -0700 | [diff] [blame] | 751 | return -EACCES; |
| 752 | |
| 753 | return show_numa_map(m, v); |
| 754 | } |
| 755 | |
Jan Engelhardt | 03a4482 | 2008-02-08 04:21:19 -0800 | [diff] [blame] | 756 | static const struct seq_operations proc_pid_numa_maps_op = { |
Christoph Lameter | 1a75a6c | 2006-01-08 01:01:02 -0800 | [diff] [blame] | 757 | .start = m_start, |
| 758 | .next = m_next, |
| 759 | .stop = m_stop, |
Kees Cook | 5096add | 2007-05-08 00:26:04 -0700 | [diff] [blame] | 760 | .show = show_numa_map_checked |
Christoph Lameter | 6e21c8f | 2005-09-03 15:54:45 -0700 | [diff] [blame] | 761 | }; |
Eric W. Biederman | 662795d | 2006-06-26 00:25:48 -0700 | [diff] [blame] | 762 | |
| 763 | static int numa_maps_open(struct inode *inode, struct file *file) |
| 764 | { |
| 765 | return do_maps_open(inode, file, &proc_pid_numa_maps_op); |
| 766 | } |
| 767 | |
Arjan van de Ven | 00977a5 | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 768 | const struct file_operations proc_numa_maps_operations = { |
Eric W. Biederman | 662795d | 2006-06-26 00:25:48 -0700 | [diff] [blame] | 769 | .open = numa_maps_open, |
| 770 | .read = seq_read, |
| 771 | .llseek = seq_lseek, |
Eric W. Biederman | 99f8955 | 2006-06-26 00:25:55 -0700 | [diff] [blame] | 772 | .release = seq_release_private, |
Eric W. Biederman | 662795d | 2006-06-26 00:25:48 -0700 | [diff] [blame] | 773 | }; |
Christoph Lameter | 6e21c8f | 2005-09-03 15:54:45 -0700 | [diff] [blame] | 774 | #endif |