dir.c (47237687d73cbeae1dd7a133c3fc3d7239094568) dir.c (d95852777bc8ba6b3ad3397d495c5f9dd8ca8383)
1/*
2 * linux/fs/nfs/dir.c
3 *
4 * Copyright (C) 1992 Rick Sladkey
5 *
6 * nfs directory handling functions
7 *
8 * 10 Apr 1996 Added silly rename for unlink --okir

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106 .getxattr = nfs3_getxattr,
107 .setxattr = nfs3_setxattr,
108 .removexattr = nfs3_removexattr,
109};
110#endif /* CONFIG_NFS_V3 */
111
112#ifdef CONFIG_NFS_V4
113
1/*
2 * linux/fs/nfs/dir.c
3 *
4 * Copyright (C) 1992 Rick Sladkey
5 *
6 * nfs directory handling functions
7 *
8 * 10 Apr 1996 Added silly rename for unlink --okir

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106 .getxattr = nfs3_getxattr,
107 .setxattr = nfs3_setxattr,
108 .removexattr = nfs3_removexattr,
109};
110#endif /* CONFIG_NFS_V3 */
111
112#ifdef CONFIG_NFS_V4
113
114static struct file *nfs_atomic_open(struct inode *, struct dentry *,
115 struct opendata *, unsigned, umode_t,
116 int *);
114static int nfs_atomic_open(struct inode *, struct dentry *,
115 struct opendata *, unsigned, umode_t,
116 int *);
117const struct inode_operations nfs4_dir_inode_operations = {
118 .create = nfs_create,
119 .lookup = nfs_lookup,
120 .atomic_open = nfs_atomic_open,
121 .link = nfs_link,
122 .unlink = nfs_unlink,
123 .symlink = nfs_symlink,
124 .mkdir = nfs_mkdir,

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1382}
1383
1384static int do_open(struct inode *inode, struct file *filp)
1385{
1386 nfs_fscache_set_inode_cookie(inode, filp);
1387 return 0;
1388}
1389
117const struct inode_operations nfs4_dir_inode_operations = {
118 .create = nfs_create,
119 .lookup = nfs_lookup,
120 .atomic_open = nfs_atomic_open,
121 .link = nfs_link,
122 .unlink = nfs_unlink,
123 .symlink = nfs_symlink,
124 .mkdir = nfs_mkdir,

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1382}
1383
1384static int do_open(struct inode *inode, struct file *filp)
1385{
1386 nfs_fscache_set_inode_cookie(inode, filp);
1387 return 0;
1388}
1389
1390static struct file *nfs_finish_open(struct nfs_open_context *ctx,
1391 struct dentry *dentry,
1392 struct opendata *od, unsigned open_flags,
1393 int *opened)
1390static int nfs_finish_open(struct nfs_open_context *ctx,
1391 struct dentry *dentry,
1392 struct opendata *od, unsigned open_flags,
1393 int *opened)
1394{
1395 struct file *filp;
1396 int err;
1397
1398 if (ctx->dentry != dentry) {
1399 dput(ctx->dentry);
1400 ctx->dentry = dget(dentry);
1401 }
1402
1403 /* If the open_intent is for execute, we have an extra check to make */
1404 if (ctx->mode & FMODE_EXEC) {
1405 err = nfs_may_open(dentry->d_inode, ctx->cred, open_flags);
1394{
1395 struct file *filp;
1396 int err;
1397
1398 if (ctx->dentry != dentry) {
1399 dput(ctx->dentry);
1400 ctx->dentry = dget(dentry);
1401 }
1402
1403 /* If the open_intent is for execute, we have an extra check to make */
1404 if (ctx->mode & FMODE_EXEC) {
1405 err = nfs_may_open(dentry->d_inode, ctx->cred, open_flags);
1406 if (err < 0) {
1407 filp = ERR_PTR(err);
1406 if (err < 0)
1408 goto out;
1407 goto out;
1409 }
1410 }
1411
1412 filp = finish_open(od, dentry, do_open, opened);
1408 }
1409
1410 filp = finish_open(od, dentry, do_open, opened);
1413 if (!IS_ERR(filp))
1414 nfs_file_set_open_context(filp, ctx);
1411 if (IS_ERR(filp)) {
1412 err = PTR_ERR(filp);
1413 goto out;
1414 }
1415 nfs_file_set_open_context(filp, ctx);
1416 err = 0;
1415
1416out:
1417 put_nfs_open_context(ctx);
1417
1418out:
1419 put_nfs_open_context(ctx);
1418 return filp;
1420 return err;
1419}
1420
1421}
1422
1421static struct file *nfs_atomic_open(struct inode *dir, struct dentry *dentry,
1422 struct opendata *od, unsigned open_flags,
1423 umode_t mode, int *opened)
1423static int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
1424 struct opendata *od, unsigned open_flags,
1425 umode_t mode, int *opened)
1424{
1425 struct nfs_open_context *ctx;
1426 struct dentry *res;
1427 struct iattr attr = { .ia_valid = ATTR_OPEN };
1428 struct inode *inode;
1426{
1427 struct nfs_open_context *ctx;
1428 struct dentry *res;
1429 struct iattr attr = { .ia_valid = ATTR_OPEN };
1430 struct inode *inode;
1429 struct file *filp;
1430 int err;
1431
1432 /* Expect a negative dentry */
1433 BUG_ON(dentry->d_inode);
1434
1435 dfprintk(VFS, "NFS: atomic_open(%s/%ld), %s\n",
1436 dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
1437
1438 /* NFS only supports OPEN on regular files */
1439 if ((open_flags & O_DIRECTORY)) {
1431 int err;
1432
1433 /* Expect a negative dentry */
1434 BUG_ON(dentry->d_inode);
1435
1436 dfprintk(VFS, "NFS: atomic_open(%s/%ld), %s\n",
1437 dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
1438
1439 /* NFS only supports OPEN on regular files */
1440 if ((open_flags & O_DIRECTORY)) {
1440 err = -ENOENT;
1441 if (!d_unhashed(dentry)) {
1442 /*
1443 * Hashed negative dentry with O_DIRECTORY: dentry was
1444 * revalidated and is fine, no need to perform lookup
1445 * again
1446 */
1441 if (!d_unhashed(dentry)) {
1442 /*
1443 * Hashed negative dentry with O_DIRECTORY: dentry was
1444 * revalidated and is fine, no need to perform lookup
1445 * again
1446 */
1447 goto out_err;
1447 return -ENOENT;
1448 }
1449 goto no_open;
1450 }
1451
1448 }
1449 goto no_open;
1450 }
1451
1452 err = -ENAMETOOLONG;
1453 if (dentry->d_name.len > NFS_SERVER(dir)->namelen)
1452 if (dentry->d_name.len > NFS_SERVER(dir)->namelen)
1454 goto out_err;
1453 return -ENAMETOOLONG;
1455
1456 if (open_flags & O_CREAT) {
1457 attr.ia_valid |= ATTR_MODE;
1458 attr.ia_mode = mode & ~current_umask();
1459 }
1460 if (open_flags & O_TRUNC) {
1461 attr.ia_valid |= ATTR_SIZE;
1462 attr.ia_size = 0;
1463 }
1464
1465 ctx = create_nfs_open_context(dentry, open_flags);
1466 err = PTR_ERR(ctx);
1467 if (IS_ERR(ctx))
1454
1455 if (open_flags & O_CREAT) {
1456 attr.ia_valid |= ATTR_MODE;
1457 attr.ia_mode = mode & ~current_umask();
1458 }
1459 if (open_flags & O_TRUNC) {
1460 attr.ia_valid |= ATTR_SIZE;
1461 attr.ia_size = 0;
1462 }
1463
1464 ctx = create_nfs_open_context(dentry, open_flags);
1465 err = PTR_ERR(ctx);
1466 if (IS_ERR(ctx))
1468 goto out_err;
1467 goto out;
1469
1470 nfs_block_sillyrename(dentry->d_parent);
1471 inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr);
1472 d_drop(dentry);
1473 if (IS_ERR(inode)) {
1474 nfs_unblock_sillyrename(dentry->d_parent);
1475 put_nfs_open_context(ctx);
1476 err = PTR_ERR(inode);

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1484 case -ELOOP:
1485 if (!(open_flags & O_NOFOLLOW))
1486 goto no_open;
1487 break;
1488 /* case -EINVAL: */
1489 default:
1490 break;
1491 }
1468
1469 nfs_block_sillyrename(dentry->d_parent);
1470 inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr);
1471 d_drop(dentry);
1472 if (IS_ERR(inode)) {
1473 nfs_unblock_sillyrename(dentry->d_parent);
1474 put_nfs_open_context(ctx);
1475 err = PTR_ERR(inode);

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1483 case -ELOOP:
1484 if (!(open_flags & O_NOFOLLOW))
1485 goto no_open;
1486 break;
1487 /* case -EINVAL: */
1488 default:
1489 break;
1490 }
1492 goto out_err;
1491 goto out;
1493 }
1494 res = d_add_unique(dentry, inode);
1495 if (res != NULL)
1496 dentry = res;
1497
1498 nfs_unblock_sillyrename(dentry->d_parent);
1499 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1500
1492 }
1493 res = d_add_unique(dentry, inode);
1494 if (res != NULL)
1495 dentry = res;
1496
1497 nfs_unblock_sillyrename(dentry->d_parent);
1498 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1499
1501 filp = nfs_finish_open(ctx, dentry, od, open_flags, opened);
1500 err = nfs_finish_open(ctx, dentry, od, open_flags, opened);
1502
1503 dput(res);
1501
1502 dput(res);
1504 return filp;
1503out:
1504 return err;
1505
1505
1506out_err:
1507 return ERR_PTR(err);
1508
1509no_open:
1510 res = nfs_lookup(dir, dentry, NULL);
1511 err = PTR_ERR(res);
1512 if (IS_ERR(res))
1506no_open:
1507 res = nfs_lookup(dir, dentry, NULL);
1508 err = PTR_ERR(res);
1509 if (IS_ERR(res))
1513 goto out_err;
1510 goto out;
1514
1515 finish_no_open(od, res);
1511
1512 finish_no_open(od, res);
1516 return NULL;
1513 return 1;
1517}
1518
1519static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
1520{
1521 struct dentry *parent = NULL;
1522 struct inode *inode;
1523 struct inode *dir;
1524 int ret = 0;

--- 775 unchanged lines hidden --- 		1514}
1515
1516static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
1517{
1518 struct dentry *parent = NULL;
1519 struct inode *inode;
1520 struct inode *dir;
1521 int ret = 0;

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