mmap.c (fbc90c042cd1dc7258ebfebe6d226017e5b5ac8c) mmap.c (9651fcedf7b92d3f7f1ab179e8ab55b85ee10fc1)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * mm/mmap.c
4 *
5 * Written by obz.
6 *
7 * Address space accounting code <alan@lxorguk.ukuu.org.uk>
8 */

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126 if (file) {
127 struct address_space *mapping = file->f_mapping;
128 i_mmap_lock_write(mapping);
129 __remove_shared_vm_struct(vma, mapping);
130 i_mmap_unlock_write(mapping);
131 }
132}
133
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * mm/mmap.c
4 *
5 * Written by obz.
6 *
7 * Address space accounting code <alan@lxorguk.ukuu.org.uk>
8 */

--- 117 unchanged lines hidden (view full) ---

126 if (file) {
127 struct address_space *mapping = file->f_mapping;
128 i_mmap_lock_write(mapping);
129 __remove_shared_vm_struct(vma, mapping);
130 i_mmap_unlock_write(mapping);
131 }
132}
133
134void unlink_file_vma_batch_init(struct unlink_vma_file_batch *vb)
135{
136 vb->count = 0;
137}
138
139static void unlink_file_vma_batch_process(struct unlink_vma_file_batch *vb)
140{
141 struct address_space *mapping;
142 int i;
143
144 mapping = vb->vmas[0]->vm_file->f_mapping;
145 i_mmap_lock_write(mapping);
146 for (i = 0; i < vb->count; i++) {
147 VM_WARN_ON_ONCE(vb->vmas[i]->vm_file->f_mapping != mapping);
148 __remove_shared_vm_struct(vb->vmas[i], mapping);
149 }
150 i_mmap_unlock_write(mapping);
151
152 unlink_file_vma_batch_init(vb);
153}
154
155void unlink_file_vma_batch_add(struct unlink_vma_file_batch *vb,
156 struct vm_area_struct *vma)
157{
158 if (vma->vm_file == NULL)
159 return;
160
161 if ((vb->count > 0 && vb->vmas[0]->vm_file != vma->vm_file) ||
162 vb->count == ARRAY_SIZE(vb->vmas))
163 unlink_file_vma_batch_process(vb);
164
165 vb->vmas[vb->count] = vma;
166 vb->count++;
167}
168
169void unlink_file_vma_batch_final(struct unlink_vma_file_batch *vb)
170{
171 if (vb->count > 0)
172 unlink_file_vma_batch_process(vb);
173}
174
175/*
176 * Close a vm structure and free it.
177 */
178static void remove_vma(struct vm_area_struct *vma, bool unreachable)
179{
180 might_sleep();
181 if (vma->vm_ops && vma->vm_ops->close)
182 vma->vm_ops->close(vma);

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1405 if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP))
1406 return -EINVAL;
1407 /*
1408 * Ignore pgoff.
1409 */
1410 pgoff = 0;
1411 vm_flags |= VM_SHARED | VM_MAYSHARE;
1412 break;
134/*
135 * Close a vm structure and free it.
136 */
137static void remove_vma(struct vm_area_struct *vma, bool unreachable)
138{
139 might_sleep();
140 if (vma->vm_ops && vma->vm_ops->close)
141 vma->vm_ops->close(vma);

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1364 if (vm_flags & (VM_GROWSDOWN|VM_GROWSUP))
1365 return -EINVAL;
1366 /*
1367 * Ignore pgoff.
1368 */
1369 pgoff = 0;
1370 vm_flags |= VM_SHARED | VM_MAYSHARE;
1371 break;
1372 case MAP_DROPPABLE:
1373 if (VM_DROPPABLE == VM_NONE)
1374 return -ENOTSUPP;
1375 /*
1376 * A locked or stack area makes no sense to be droppable.
1377 *
1378 * Also, since droppable pages can just go away at any time
1379 * it makes no sense to copy them on fork or dump them.
1380 *
1381 * And don't attempt to combine with hugetlb for now.
1382 */
1383 if (flags & (MAP_LOCKED | MAP_HUGETLB))
1384 return -EINVAL;
1385 if (vm_flags & (VM_GROWSDOWN | VM_GROWSUP))
1386 return -EINVAL;
1387
1388 vm_flags |= VM_DROPPABLE;
1389
1390 /*
1391 * If the pages can be dropped, then it doesn't make
1392 * sense to reserve them.
1393 */
1394 vm_flags |= VM_NORESERVE;
1395
1396 /*
1397 * Likewise, they're volatile enough that they
1398 * shouldn't survive forks or coredumps.
1399 */
1400 vm_flags |= VM_WIPEONFORK | VM_DONTDUMP;
1401 fallthrough;
1413 case MAP_PRIVATE:
1414 /*
1415 * Set pgoff according to addr for anon_vma.
1416 */
1417 pgoff = addr >> PAGE_SHIFT;
1418 break;
1419 default:
1420 return -EINVAL;

--- 2640 unchanged lines hidden --- 		1402 case MAP_PRIVATE:
1403 /*
1404 * Set pgoff according to addr for anon_vma.
1405 */
1406 pgoff = addr >> PAGE_SHIFT;
1407 break;
1408 default:
1409 return -EINVAL;

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