121 	if (filp->f_path.dentry == filp->f_path.mnt->mnt_root) {  in nfs_opendir()
415 int nfs_same_file(struct dentry *dentry, struct nfs_entry *entry)  in nfs_same_file()  argument
419 	if (d_really_is_negative(dentry))  in nfs_same_file()
422 	nfsi = NFS_I(d_inode(dentry));  in nfs_same_file()
470 void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry)  in nfs_prime_dcache()
473 	struct dentry *dentry;  in nfs_prime_dcache()  local
474 	struct dentry *alias;  in nfs_prime_dcache()
491 	dentry = d_lookup(parent, &filename);  in nfs_prime_dcache()
492 	if (dentry != NULL) {  in nfs_prime_dcache()
494 		if (!nfs_fsid_equal(&NFS_SB(dentry->d_sb)->fsid,  in nfs_prime_dcache()
497 		if (nfs_same_file(dentry, entry)) {  in nfs_prime_dcache()
498 			nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_prime_dcache()
499 			status = nfs_refresh_inode(d_inode(dentry), entry->fattr);  in nfs_prime_dcache()
501 				nfs_setsecurity(d_inode(dentry), entry->fattr, entry->label);  in nfs_prime_dcache()
504 			d_invalidate(dentry);  in nfs_prime_dcache()
505 			dput(dentry);  in nfs_prime_dcache()
509 	dentry = d_alloc(parent, &filename);  in nfs_prime_dcache()
510 	if (dentry == NULL)  in nfs_prime_dcache()
513 	inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr, entry->label);  in nfs_prime_dcache()
517 	alias = d_splice_alias(inode, dentry);  in nfs_prime_dcache()
524 		nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_prime_dcache()
527 	dput(dentry);  in nfs_prime_dcache()
867 	struct dentry	*dentry = file_dentry(file);  in nfs_readdir()  local
868 	struct inode	*inode = d_inode(dentry);  in nfs_readdir()
892 	nfs_block_sillyrename(dentry);  in nfs_readdir()
928 	nfs_unblock_sillyrename(dentry);  in nfs_readdir()
1003 static int nfs_check_verifier(struct inode *dir, struct dentry *dentry,  in nfs_check_verifier()  argument
1008 	if (IS_ROOT(dentry))  in nfs_check_verifier()
1012 	if (!nfs_verify_change_attribute(dir, dentry->d_time))  in nfs_check_verifier()
1021 	if (!nfs_verify_change_attribute(dir, dentry->d_time))  in nfs_check_verifier()
1082 int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,  in nfs_neg_need_reval()  argument
1090 	return !nfs_check_verifier(dir, dentry, flags & LOOKUP_RCU);  in nfs_neg_need_reval()
1104 static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags)  in nfs_lookup_revalidate()  argument
1108 	struct dentry *parent;  in nfs_lookup_revalidate()
1115 		parent = ACCESS_ONCE(dentry->d_parent);  in nfs_lookup_revalidate()
1120 		parent = dget_parent(dentry);  in nfs_lookup_revalidate()
1124 	inode = d_inode(dentry);  in nfs_lookup_revalidate()
1127 		if (nfs_neg_need_reval(dir, dentry, flags)) {  in nfs_lookup_revalidate()
1139 				__func__, dentry);  in nfs_lookup_revalidate()
1148 	    nfs_check_verifier(dir, dentry, flags & LOOKUP_RCU)) {  in nfs_lookup_revalidate()
1174 	trace_nfs_lookup_revalidate_enter(dir, dentry, flags);  in nfs_lookup_revalidate()
1175 	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);  in nfs_lookup_revalidate()
1176 	trace_nfs_lookup_revalidate_exit(dir, dentry, flags, error);  in nfs_lookup_revalidate()
1191 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_lookup_revalidate()
1197 		if (parent != ACCESS_ONCE(dentry->d_parent))  in nfs_lookup_revalidate()
1202 			__func__, dentry);  in nfs_lookup_revalidate()
1221 		if (IS_ROOT(dentry))  in nfs_lookup_revalidate()
1226 			__func__, dentry);  in nfs_lookup_revalidate()
1235 			__func__, dentry, error);  in nfs_lookup_revalidate()
1248 static int nfs_weak_revalidate(struct dentry *dentry, unsigned int flags)  in nfs_weak_revalidate()  argument
1251 	struct inode *inode = d_inode(dentry);  in nfs_weak_revalidate()
1260 				__func__, dentry);  in nfs_weak_revalidate()
1266 				__func__, dentry);  in nfs_weak_revalidate()
1279 static int nfs_dentry_delete(const struct dentry *dentry)  in nfs_dentry_delete()  argument
1282 		dentry, dentry->d_flags);  in nfs_dentry_delete()
1285 	if (d_really_is_positive(dentry) && NFS_STALE(d_inode(dentry)))  in nfs_dentry_delete()
1288 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {  in nfs_dentry_delete()
1292 	if (!(dentry->d_sb->s_flags & MS_ACTIVE)) {  in nfs_dentry_delete()
1316 static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)  in nfs_dentry_iput()  argument
1322 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {  in nfs_dentry_iput()
1323 		nfs_complete_unlink(dentry, inode);  in nfs_dentry_iput()
1329 static void nfs_d_release(struct dentry *dentry)  in nfs_d_release()  argument
1332 	if (unlikely(dentry->d_fsdata)) {  in nfs_d_release()
1333 		if (dentry->d_flags & DCACHE_NFSFS_RENAMED)  in nfs_d_release()
1336 			kfree(dentry->d_fsdata);  in nfs_d_release()
1350 struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)  in nfs_lookup()  argument
1352 	struct dentry *res;  in nfs_lookup()
1353 	struct dentry *parent;  in nfs_lookup()
1360 	dfprintk(VFS, "NFS: lookup(%pd2)\n", dentry);  in nfs_lookup()
1364 	if (dentry->d_name.len > NFS_SERVER(dir)->namelen)  in nfs_lookup()
1372 		d_instantiate(dentry, NULL);  in nfs_lookup()
1387 	parent = dentry->d_parent;  in nfs_lookup()
1389 	trace_nfs_lookup_enter(dir, dentry, flags);  in nfs_lookup()
1391 	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);  in nfs_lookup()
1398 	inode = nfs_fhget(dentry->d_sb, fhandle, fattr, label);  in nfs_lookup()
1407 	res = d_splice_alias(inode, dentry);  in nfs_lookup()
1411 		dentry = res;  in nfs_lookup()
1413 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_lookup()
1416 	trace_nfs_lookup_exit(dir, dentry, flags, error);  in nfs_lookup()
1426 static int nfs4_lookup_revalidate(struct dentry *, unsigned int);
1447 static struct nfs_open_context *create_nfs_open_context(struct dentry *dentry, int open_flags)  in create_nfs_open_context()  argument
1449 	return alloc_nfs_open_context(dentry, flags_to_mode(open_flags));  in create_nfs_open_context()
1459 			   struct dentry *dentry,  in nfs_finish_open()  argument
1465 	err = finish_open(file, dentry, do_open, opened);  in nfs_finish_open()
1474 int nfs_atomic_open(struct inode *dir, struct dentry *dentry,  in nfs_atomic_open()  argument
1479 	struct dentry *res;  in nfs_atomic_open()
1486 	BUG_ON(d_inode(dentry));  in nfs_atomic_open()
1489 			dir->i_sb->s_id, dir->i_ino, dentry);  in nfs_atomic_open()
1497 		if (!d_unhashed(dentry)) {  in nfs_atomic_open()
1509 	if (dentry->d_name.len > NFS_SERVER(dir)->namelen)  in nfs_atomic_open()
1521 	ctx = create_nfs_open_context(dentry, open_flags);  in nfs_atomic_open()
1527 	nfs_block_sillyrename(dentry->d_parent);  in nfs_atomic_open()
1529 	nfs_unblock_sillyrename(dentry->d_parent);  in nfs_atomic_open()
1536 			d_drop(dentry);  in nfs_atomic_open()
1537 			d_add(dentry, NULL);  in nfs_atomic_open()
1538 			nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_atomic_open()
1554 	err = nfs_finish_open(ctx, ctx->dentry, file, open_flags, opened);  in nfs_atomic_open()
1561 	res = nfs_lookup(dir, dentry, lookup_flags);  in nfs_atomic_open()
1570 static int nfs4_lookup_revalidate(struct dentry *dentry, unsigned int flags)  in nfs4_lookup_revalidate()  argument
1577 	if (d_mountpoint(dentry))  in nfs4_lookup_revalidate()
1579 	if (NFS_SB(dentry->d_sb)->caps & NFS_CAP_ATOMIC_OPEN_V1)  in nfs4_lookup_revalidate()
1582 	inode = d_inode(dentry);  in nfs4_lookup_revalidate()
1588 		struct dentry *parent;  in nfs4_lookup_revalidate()
1592 			parent = ACCESS_ONCE(dentry->d_parent);  in nfs4_lookup_revalidate()
1597 			parent = dget_parent(dentry);  in nfs4_lookup_revalidate()
1600 		if (!nfs_neg_need_reval(dir, dentry, flags))  in nfs4_lookup_revalidate()
1606 		else if (parent != ACCESS_ONCE(dentry->d_parent))  in nfs4_lookup_revalidate()
1625 	return nfs_lookup_revalidate(dentry, flags);  in nfs4_lookup_revalidate()
1633 int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle,  in nfs_instantiate()  argument
1637 	struct dentry *parent = dget_parent(dentry);  in nfs_instantiate()
1642 	d_drop(dentry);  in nfs_instantiate()
1645 	if (d_really_is_positive(dentry))  in nfs_instantiate()
1648 		error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, NULL);  in nfs_instantiate()
1652 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_instantiate()
1654 		struct nfs_server *server = NFS_SB(dentry->d_sb);  in nfs_instantiate()
1659 	inode = nfs_fhget(dentry->d_sb, fhandle, fattr, label);  in nfs_instantiate()
1663 	d_add(dentry, inode);  in nfs_instantiate()
1680 int nfs_create(struct inode *dir, struct dentry *dentry,  in nfs_create()  argument
1688 			dir->i_sb->s_id, dir->i_ino, dentry);  in nfs_create()
1693 	trace_nfs_create_enter(dir, dentry, open_flags);  in nfs_create()
1694 	error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags);  in nfs_create()
1695 	trace_nfs_create_exit(dir, dentry, open_flags, error);  in nfs_create()
1700 	d_drop(dentry);  in nfs_create()
1709 nfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)  in nfs_mknod()  argument
1715 			dir->i_sb->s_id, dir->i_ino, dentry);  in nfs_mknod()
1720 	trace_nfs_mknod_enter(dir, dentry);  in nfs_mknod()
1721 	status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev);  in nfs_mknod()
1722 	trace_nfs_mknod_exit(dir, dentry, status);  in nfs_mknod()
1727 	d_drop(dentry);  in nfs_mknod()
1735 int nfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)  in nfs_mkdir()  argument
1741 			dir->i_sb->s_id, dir->i_ino, dentry);  in nfs_mkdir()
1746 	trace_nfs_mkdir_enter(dir, dentry);  in nfs_mkdir()
1747 	error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr);  in nfs_mkdir()
1748 	trace_nfs_mkdir_exit(dir, dentry, error);  in nfs_mkdir()
1753 	d_drop(dentry);  in nfs_mkdir()
1758 static void nfs_dentry_handle_enoent(struct dentry *dentry)  in nfs_dentry_handle_enoent()  argument
1760 	if (simple_positive(dentry))  in nfs_dentry_handle_enoent()
1761 		d_delete(dentry);  in nfs_dentry_handle_enoent()
1764 int nfs_rmdir(struct inode *dir, struct dentry *dentry)  in nfs_rmdir()  argument
1769 			dir->i_sb->s_id, dir->i_ino, dentry);  in nfs_rmdir()
1771 	trace_nfs_rmdir_enter(dir, dentry);  in nfs_rmdir()
1772 	if (d_really_is_positive(dentry)) {  in nfs_rmdir()
1773 		nfs_wait_on_sillyrename(dentry);  in nfs_rmdir()
1774 		error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);  in nfs_rmdir()
1778 			clear_nlink(d_inode(dentry));  in nfs_rmdir()
1781 			nfs_dentry_handle_enoent(dentry);  in nfs_rmdir()
1784 		error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);  in nfs_rmdir()
1785 	trace_nfs_rmdir_exit(dir, dentry, error);  in nfs_rmdir()
1798 static int nfs_safe_remove(struct dentry *dentry)  in nfs_safe_remove()  argument
1800 	struct inode *dir = d_inode(dentry->d_parent);  in nfs_safe_remove()
1801 	struct inode *inode = d_inode(dentry);  in nfs_safe_remove()
1804 	dfprintk(VFS, "NFS: safe_remove(%pd2)\n", dentry);  in nfs_safe_remove()
1807 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {  in nfs_safe_remove()
1812 	trace_nfs_remove_enter(dir, dentry);  in nfs_safe_remove()
1815 		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);  in nfs_safe_remove()
1819 		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);  in nfs_safe_remove()
1821 		nfs_dentry_handle_enoent(dentry);  in nfs_safe_remove()
1822 	trace_nfs_remove_exit(dir, dentry, error);  in nfs_safe_remove()
1832 int nfs_unlink(struct inode *dir, struct dentry *dentry)  in nfs_unlink()  argument
1838 		dir->i_ino, dentry);  in nfs_unlink()
1840 	trace_nfs_unlink_enter(dir, dentry);  in nfs_unlink()
1841 	spin_lock(&dentry->d_lock);  in nfs_unlink()
1842 	if (d_count(dentry) > 1) {  in nfs_unlink()
1843 		spin_unlock(&dentry->d_lock);  in nfs_unlink()
1845 		write_inode_now(d_inode(dentry), 0);  in nfs_unlink()
1846 		error = nfs_sillyrename(dir, dentry);  in nfs_unlink()
1849 	if (!d_unhashed(dentry)) {  in nfs_unlink()
1850 		__d_drop(dentry);  in nfs_unlink()
1853 	spin_unlock(&dentry->d_lock);  in nfs_unlink()
1854 	error = nfs_safe_remove(dentry);  in nfs_unlink()
1856 		nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_unlink()
1858 		d_rehash(dentry);  in nfs_unlink()
1860 	trace_nfs_unlink_exit(dir, dentry, error);  in nfs_unlink()
1880 int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)  in nfs_symlink()  argument
1889 		dir->i_ino, dentry, symname);  in nfs_symlink()
1907 	trace_nfs_symlink_enter(dir, dentry);  in nfs_symlink()
1908 	error = NFS_PROTO(dir)->symlink(dir, dentry, page, pathlen, &attr);  in nfs_symlink()
1909 	trace_nfs_symlink_exit(dir, dentry, error);  in nfs_symlink()
1913 			dentry, symname, error);  in nfs_symlink()
1914 		d_drop(dentry);  in nfs_symlink()
1923 	if (!add_to_page_cache_lru(page, d_inode(dentry)->i_mapping, 0,  in nfs_symlink()
1940 nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)  in nfs_link()  argument
1946 		old_dentry, dentry);  in nfs_link()
1948 	trace_nfs_link_enter(inode, dir, dentry);  in nfs_link()
1951 	d_drop(dentry);  in nfs_link()
1952 	error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name);  in nfs_link()
1955 		d_add(dentry, inode);  in nfs_link()
1957 	trace_nfs_link_exit(inode, dir, dentry, error);  in nfs_link()
1986 int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,  in nfs_rename()
1987 		      struct inode *new_dir, struct dentry *new_dentry)  in nfs_rename()
1991 	struct dentry *dentry = NULL, *rehash = NULL;  in nfs_rename()  local
2020 			dentry = d_alloc(new_dentry->d_parent,  in nfs_rename()
2022 			if (!dentry)  in nfs_rename()
2030 			new_dentry = dentry;  in nfs_rename()
2066 	if (dentry)  in nfs_rename()
2067 		dput(dentry);  in nfs_rename()