Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | #include <linux/mm.h> |
| 3 | #include <linux/file.h> |
| 4 | #include <linux/mount.h> |
| 5 | #include <linux/seq_file.h> |
| 6 | #include "internal.h" |
| 7 | |
| 8 | /* |
| 9 | * Logic: we've got two memory sums for each process, "shared", and |
| 10 | * "non-shared". Shared memory may get counted more then once, for |
| 11 | * each process that owns it. Non-shared memory is counted |
| 12 | * accurately. |
| 13 | */ |
| 14 | char *task_mem(struct mm_struct *mm, char *buffer) |
| 15 | { |
| 16 | struct vm_list_struct *vml; |
| 17 | unsigned long bytes = 0, sbytes = 0, slack = 0; |
| 18 | |
| 19 | down_read(&mm->mmap_sem); |
| 20 | for (vml = mm->context.vmlist; vml; vml = vml->next) { |
| 21 | if (!vml->vma) |
| 22 | continue; |
| 23 | |
| 24 | bytes += kobjsize(vml); |
| 25 | if (atomic_read(&mm->mm_count) > 1 || |
| 26 | atomic_read(&vml->vma->vm_usage) > 1 |
| 27 | ) { |
| 28 | sbytes += kobjsize((void *) vml->vma->vm_start); |
| 29 | sbytes += kobjsize(vml->vma); |
| 30 | } else { |
| 31 | bytes += kobjsize((void *) vml->vma->vm_start); |
| 32 | bytes += kobjsize(vml->vma); |
| 33 | slack += kobjsize((void *) vml->vma->vm_start) - |
| 34 | (vml->vma->vm_end - vml->vma->vm_start); |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | if (atomic_read(&mm->mm_count) > 1) |
| 39 | sbytes += kobjsize(mm); |
| 40 | else |
| 41 | bytes += kobjsize(mm); |
| 42 | |
| 43 | if (current->fs && atomic_read(¤t->fs->count) > 1) |
| 44 | sbytes += kobjsize(current->fs); |
| 45 | else |
| 46 | bytes += kobjsize(current->fs); |
| 47 | |
| 48 | if (current->files && atomic_read(¤t->files->count) > 1) |
| 49 | sbytes += kobjsize(current->files); |
| 50 | else |
| 51 | bytes += kobjsize(current->files); |
| 52 | |
| 53 | if (current->sighand && atomic_read(¤t->sighand->count) > 1) |
| 54 | sbytes += kobjsize(current->sighand); |
| 55 | else |
| 56 | bytes += kobjsize(current->sighand); |
| 57 | |
| 58 | bytes += kobjsize(current); /* includes kernel stack */ |
| 59 | |
| 60 | buffer += sprintf(buffer, |
| 61 | "Mem:\t%8lu bytes\n" |
| 62 | "Slack:\t%8lu bytes\n" |
| 63 | "Shared:\t%8lu bytes\n", |
| 64 | bytes, slack, sbytes); |
| 65 | |
| 66 | up_read(&mm->mmap_sem); |
| 67 | return buffer; |
| 68 | } |
| 69 | |
| 70 | unsigned long task_vsize(struct mm_struct *mm) |
| 71 | { |
| 72 | struct vm_list_struct *tbp; |
| 73 | unsigned long vsize = 0; |
| 74 | |
| 75 | down_read(&mm->mmap_sem); |
| 76 | for (tbp = mm->context.vmlist; tbp; tbp = tbp->next) { |
| 77 | if (tbp->vma) |
| 78 | vsize += kobjsize((void *) tbp->vma->vm_start); |
| 79 | } |
| 80 | up_read(&mm->mmap_sem); |
| 81 | return vsize; |
| 82 | } |
| 83 | |
| 84 | int task_statm(struct mm_struct *mm, int *shared, int *text, |
| 85 | int *data, int *resident) |
| 86 | { |
| 87 | struct vm_list_struct *tbp; |
| 88 | int size = kobjsize(mm); |
| 89 | |
| 90 | down_read(&mm->mmap_sem); |
| 91 | for (tbp = mm->context.vmlist; tbp; tbp = tbp->next) { |
| 92 | size += kobjsize(tbp); |
| 93 | if (tbp->vma) { |
| 94 | size += kobjsize(tbp->vma); |
| 95 | size += kobjsize((void *) tbp->vma->vm_start); |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | size += (*text = mm->end_code - mm->start_code); |
| 100 | size += (*data = mm->start_stack - mm->start_data); |
| 101 | up_read(&mm->mmap_sem); |
| 102 | *resident = size; |
| 103 | return size; |
| 104 | } |
| 105 | |
| 106 | int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt) |
| 107 | { |
| 108 | struct vm_list_struct *vml; |
| 109 | struct vm_area_struct *vma; |
Greg Ungerer | 31304c9 | 2006-07-04 15:04:39 +1000 | [diff] [blame] | 110 | struct task_struct *task = get_proc_task(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | struct mm_struct *mm = get_task_mm(task); |
| 112 | int result = -ENOENT; |
| 113 | |
| 114 | if (!mm) |
| 115 | goto out; |
| 116 | down_read(&mm->mmap_sem); |
| 117 | |
| 118 | vml = mm->context.vmlist; |
| 119 | vma = NULL; |
| 120 | while (vml) { |
| 121 | if ((vml->vma->vm_flags & VM_EXECUTABLE) && vml->vma->vm_file) { |
| 122 | vma = vml->vma; |
| 123 | break; |
| 124 | } |
| 125 | vml = vml->next; |
| 126 | } |
| 127 | |
| 128 | if (vma) { |
Josef "Jeff" Sipek | 2fddfee | 2006-12-08 02:36:36 -0800 | [diff] [blame^] | 129 | *mnt = mntget(vma->vm_file->f_path.mnt); |
| 130 | *dentry = dget(vma->vm_file->f_path.dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | result = 0; |
| 132 | } |
| 133 | |
| 134 | up_read(&mm->mmap_sem); |
| 135 | mmput(mm); |
| 136 | out: |
| 137 | return result; |
| 138 | } |
| 139 | |
| 140 | /* |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 141 | * display mapping lines for a particular process's /proc/pid/maps |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | */ |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 143 | static int show_map(struct seq_file *m, void *_vml) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | { |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 145 | struct vm_list_struct *vml = _vml; |
| 146 | return nommu_vma_show(m, vml->vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | } |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | static void *m_start(struct seq_file *m, loff_t *pos) |
| 150 | { |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 151 | struct proc_maps_private *priv = m->private; |
| 152 | struct vm_list_struct *vml; |
| 153 | struct mm_struct *mm; |
| 154 | loff_t n = *pos; |
| 155 | |
| 156 | /* pin the task and mm whilst we play with them */ |
| 157 | priv->task = get_pid_task(priv->pid, PIDTYPE_PID); |
| 158 | if (!priv->task) |
| 159 | return NULL; |
| 160 | |
| 161 | mm = get_task_mm(priv->task); |
| 162 | if (!mm) { |
| 163 | put_task_struct(priv->task); |
| 164 | priv->task = NULL; |
| 165 | return NULL; |
| 166 | } |
| 167 | |
| 168 | down_read(&mm->mmap_sem); |
| 169 | |
| 170 | /* start from the Nth VMA */ |
| 171 | for (vml = mm->context.vmlist; vml; vml = vml->next) |
| 172 | if (n-- == 0) |
| 173 | return vml; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | return NULL; |
| 175 | } |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 176 | |
| 177 | static void m_stop(struct seq_file *m, void *_vml) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 179 | struct proc_maps_private *priv = m->private; |
| 180 | |
| 181 | if (priv->task) { |
| 182 | struct mm_struct *mm = priv->task->mm; |
| 183 | up_read(&mm->mmap_sem); |
| 184 | mmput(mm); |
| 185 | put_task_struct(priv->task); |
| 186 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | } |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 188 | |
| 189 | static void *m_next(struct seq_file *m, void *_vml, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 191 | struct vm_list_struct *vml = _vml; |
| 192 | |
| 193 | (*pos)++; |
| 194 | return vml ? vml->next : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 196 | |
| 197 | static struct seq_operations proc_pid_maps_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | .start = m_start, |
| 199 | .next = m_next, |
| 200 | .stop = m_stop, |
| 201 | .show = show_map |
| 202 | }; |
Eric W. Biederman | 662795d | 2006-06-26 00:25:48 -0700 | [diff] [blame] | 203 | |
| 204 | static int maps_open(struct inode *inode, struct file *file) |
| 205 | { |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 206 | struct proc_maps_private *priv; |
| 207 | int ret = -ENOMEM; |
| 208 | |
| 209 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
| 210 | if (priv) { |
| 211 | priv->pid = proc_pid(inode); |
| 212 | ret = seq_open(file, &proc_pid_maps_ops); |
| 213 | if (!ret) { |
| 214 | struct seq_file *m = file->private_data; |
| 215 | m->private = priv; |
| 216 | } else { |
| 217 | kfree(priv); |
| 218 | } |
Eric W. Biederman | 662795d | 2006-06-26 00:25:48 -0700 | [diff] [blame] | 219 | } |
| 220 | return ret; |
| 221 | } |
| 222 | |
| 223 | struct file_operations proc_maps_operations = { |
| 224 | .open = maps_open, |
| 225 | .read = seq_read, |
| 226 | .llseek = seq_lseek, |
David Howells | dbf8685 | 2006-09-27 01:50:19 -0700 | [diff] [blame] | 227 | .release = seq_release_private, |
Eric W. Biederman | 662795d | 2006-06-26 00:25:48 -0700 | [diff] [blame] | 228 | }; |
| 229 | |