dcache.c (1ffe46d11cc88479797b262f60d92e5fb461b411) dcache.c (5542aa2fa7f6cddb03c4ac3135e390adffda98ca)
1/*
2 * fs/dcache.c
3 *
4 * Complete reimplementation
5 * (C) 1997 Thomas Schoebel-Theuer,
6 * with heavy changes by Linus Torvalds
7 */
8

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1341 if (!data->mountpoint && !data->select.found)
1342 __d_drop(data->select.start);
1343}
1344
1345/**
1346 * d_invalidate - detach submounts, prune dcache, and drop
1347 * @dentry: dentry to invalidate (aka detach, prune and drop)
1348 *
1/*
2 * fs/dcache.c
3 *
4 * Complete reimplementation
5 * (C) 1997 Thomas Schoebel-Theuer,
6 * with heavy changes by Linus Torvalds
7 */
8

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1341 if (!data->mountpoint && !data->select.found)
1342 __d_drop(data->select.start);
1343}
1344
1345/**
1346 * d_invalidate - detach submounts, prune dcache, and drop
1347 * @dentry: dentry to invalidate (aka detach, prune and drop)
1348 *
1349 * Try to invalidate the dentry if it turns out to be
1350 * possible. If there are reasons not to delete it
1351 * return -EBUSY. On success return 0.
1352 *
1353 * no dcache lock.
1354 *
1355 * The final d_drop is done as an atomic operation relative to
1356 * rename_lock ensuring there are no races with d_set_mounted. This
1357 * ensures there are no unhashed dentries on the path to a mountpoint.
1358 */
1349 * no dcache lock.
1350 *
1351 * The final d_drop is done as an atomic operation relative to
1352 * rename_lock ensuring there are no races with d_set_mounted. This
1353 * ensures there are no unhashed dentries on the path to a mountpoint.
1354 */
1359int d_invalidate(struct dentry *dentry)
1355void d_invalidate(struct dentry *dentry)
1360{
1356{
1361 int ret = 0;
1362
1363 /*
1364 * If it's already been dropped, return OK.
1365 */
1366 spin_lock(&dentry->d_lock);
1367 if (d_unhashed(dentry)) {
1368 spin_unlock(&dentry->d_lock);
1357 /*
1358 * If it's already been dropped, return OK.
1359 */
1360 spin_lock(&dentry->d_lock);
1361 if (d_unhashed(dentry)) {
1362 spin_unlock(&dentry->d_lock);
1369 return 0;
1363 return;
1370 }
1371 spin_unlock(&dentry->d_lock);
1372
1373 /* Negative dentries can be dropped without further checks */
1374 if (!dentry->d_inode) {
1375 d_drop(dentry);
1364 }
1365 spin_unlock(&dentry->d_lock);
1366
1367 /* Negative dentries can be dropped without further checks */
1368 if (!dentry->d_inode) {
1369 d_drop(dentry);
1376 goto out;
1370 return;
1377 }
1378
1379 for (;;) {
1380 struct detach_data data;
1381
1382 data.mountpoint = NULL;
1383 INIT_LIST_HEAD(&data.select.dispose);
1384 data.select.start = dentry;

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1394 dput(data.mountpoint);
1395 }
1396
1397 if (!data.mountpoint && !data.select.found)
1398 break;
1399
1400 cond_resched();
1401 }
1371 }
1372
1373 for (;;) {
1374 struct detach_data data;
1375
1376 data.mountpoint = NULL;
1377 INIT_LIST_HEAD(&data.select.dispose);
1378 data.select.start = dentry;

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1388 dput(data.mountpoint);
1389 }
1390
1391 if (!data.mountpoint && !data.select.found)
1392 break;
1393
1394 cond_resched();
1395 }
1402
1403out:
1404 return ret;
1405}
1406EXPORT_SYMBOL(d_invalidate);
1407
1408/**
1409 * __d_alloc - allocate a dcache entry
1410 * @sb: filesystem it will belong to
1411 * @name: qstr of the name
1412 *

--- 2029 unchanged lines hidden --- 		1396}
1397EXPORT_SYMBOL(d_invalidate);
1398
1399/**
1400 * __d_alloc - allocate a dcache entry
1401 * @sb: filesystem it will belong to
1402 * @name: qstr of the name
1403 *

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