121 	if (filp->f_path.dentry == filp->f_path.mnt->mnt_root) {  in nfs_opendir()
380 	error = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred, entry->cookie, pages,  in nfs_readdir_xdr_filler()
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()
563 			nfs_prime_dcache(desc->file->f_path.dentry, entry);  in nfs_readdir_page_filler()
875 	struct dentry	*dentry = file->f_path.dentry;  in nfs_readdir()  local
876 	struct inode	*inode = d_inode(dentry);  in nfs_readdir()
900 	nfs_block_sillyrename(dentry);  in nfs_readdir()
936 	nfs_unblock_sillyrename(dentry);  in nfs_readdir()
1011 static int nfs_check_verifier(struct inode *dir, struct dentry *dentry,  in nfs_check_verifier()  argument
1016 	if (IS_ROOT(dentry))  in nfs_check_verifier()
1020 	if (!nfs_verify_change_attribute(dir, dentry->d_time))  in nfs_check_verifier()
1029 	if (!nfs_verify_change_attribute(dir, dentry->d_time))  in nfs_check_verifier()
1090 int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,  in nfs_neg_need_reval()  argument
1098 	return !nfs_check_verifier(dir, dentry, flags & LOOKUP_RCU);  in nfs_neg_need_reval()
1112 static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags)  in nfs_lookup_revalidate()  argument
1116 	struct dentry *parent;  in nfs_lookup_revalidate()
1123 		parent = ACCESS_ONCE(dentry->d_parent);  in nfs_lookup_revalidate()
1128 		parent = dget_parent(dentry);  in nfs_lookup_revalidate()
1132 	inode = d_inode(dentry);  in nfs_lookup_revalidate()
1135 		if (nfs_neg_need_reval(dir, dentry, flags)) {  in nfs_lookup_revalidate()
1147 				__func__, dentry);  in nfs_lookup_revalidate()
1156 	    nfs_check_verifier(dir, dentry, flags & LOOKUP_RCU)) {  in nfs_lookup_revalidate()
1182 	trace_nfs_lookup_revalidate_enter(dir, dentry, flags);  in nfs_lookup_revalidate()
1183 	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);  in nfs_lookup_revalidate()
1184 	trace_nfs_lookup_revalidate_exit(dir, dentry, flags, error);  in nfs_lookup_revalidate()
1199 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_lookup_revalidate()
1205 		if (parent != ACCESS_ONCE(dentry->d_parent))  in nfs_lookup_revalidate()
1210 			__func__, dentry);  in nfs_lookup_revalidate()
1229 		if (IS_ROOT(dentry))  in nfs_lookup_revalidate()
1234 			__func__, dentry);  in nfs_lookup_revalidate()
1243 			__func__, dentry, error);  in nfs_lookup_revalidate()
1256 static int nfs_weak_revalidate(struct dentry *dentry, unsigned int flags)  in nfs_weak_revalidate()  argument
1259 	struct inode *inode = d_inode(dentry);  in nfs_weak_revalidate()
1268 				__func__, dentry);  in nfs_weak_revalidate()
1274 				__func__, dentry);  in nfs_weak_revalidate()
1287 static int nfs_dentry_delete(const struct dentry *dentry)  in nfs_dentry_delete()  argument
1290 		dentry, dentry->d_flags);  in nfs_dentry_delete()
1293 	if (d_really_is_positive(dentry) && NFS_STALE(d_inode(dentry)))  in nfs_dentry_delete()
1296 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {  in nfs_dentry_delete()
1300 	if (!(dentry->d_sb->s_flags & MS_ACTIVE)) {  in nfs_dentry_delete()
1324 static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)  in nfs_dentry_iput()  argument
1330 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {  in nfs_dentry_iput()
1331 		nfs_complete_unlink(dentry, inode);  in nfs_dentry_iput()
1337 static void nfs_d_release(struct dentry *dentry)  in nfs_d_release()  argument
1340 	if (unlikely(dentry->d_fsdata)) {  in nfs_d_release()
1341 		if (dentry->d_flags & DCACHE_NFSFS_RENAMED)  in nfs_d_release()
1344 			kfree(dentry->d_fsdata);  in nfs_d_release()
1358 struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)  in nfs_lookup()  argument
1360 	struct dentry *res;  in nfs_lookup()
1361 	struct dentry *parent;  in nfs_lookup()
1368 	dfprintk(VFS, "NFS: lookup(%pd2)\n", dentry);  in nfs_lookup()
1372 	if (dentry->d_name.len > NFS_SERVER(dir)->namelen)  in nfs_lookup()
1380 		d_instantiate(dentry, NULL);  in nfs_lookup()
1395 	parent = dentry->d_parent;  in nfs_lookup()
1397 	trace_nfs_lookup_enter(dir, dentry, flags);  in nfs_lookup()
1399 	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);  in nfs_lookup()
1406 	inode = nfs_fhget(dentry->d_sb, fhandle, fattr, label);  in nfs_lookup()
1415 	res = d_splice_alias(inode, dentry);  in nfs_lookup()
1419 		dentry = res;  in nfs_lookup()
1421 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_lookup()
1424 	trace_nfs_lookup_exit(dir, dentry, flags, error);  in nfs_lookup()
1434 static int nfs4_lookup_revalidate(struct dentry *, unsigned int);
1455 static struct nfs_open_context *create_nfs_open_context(struct dentry *dentry, int open_flags)  in create_nfs_open_context()  argument
1457 	return alloc_nfs_open_context(dentry, flags_to_mode(open_flags));  in create_nfs_open_context()
1467 			   struct dentry *dentry,  in nfs_finish_open()  argument
1476 	err = finish_open(file, dentry, do_open, opened);  in nfs_finish_open()
1485 int nfs_atomic_open(struct inode *dir, struct dentry *dentry,  in nfs_atomic_open()  argument
1490 	struct dentry *res;  in nfs_atomic_open()
1497 	BUG_ON(d_inode(dentry));  in nfs_atomic_open()
1500 			dir->i_sb->s_id, dir->i_ino, dentry);  in nfs_atomic_open()
1508 		if (!d_unhashed(dentry)) {  in nfs_atomic_open()
1520 	if (dentry->d_name.len > NFS_SERVER(dir)->namelen)  in nfs_atomic_open()
1532 	ctx = create_nfs_open_context(dentry, open_flags);  in nfs_atomic_open()
1538 	nfs_block_sillyrename(dentry->d_parent);  in nfs_atomic_open()
1540 	nfs_unblock_sillyrename(dentry->d_parent);  in nfs_atomic_open()
1547 			d_drop(dentry);  in nfs_atomic_open()
1548 			d_add(dentry, NULL);  in nfs_atomic_open()
1549 			nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_atomic_open()
1565 	err = nfs_finish_open(ctx, ctx->dentry, file, open_flags, opened);  in nfs_atomic_open()
1572 	res = nfs_lookup(dir, dentry, lookup_flags);  in nfs_atomic_open()
1581 static int nfs4_lookup_revalidate(struct dentry *dentry, unsigned int flags)  in nfs4_lookup_revalidate()  argument
1588 	if (d_mountpoint(dentry))  in nfs4_lookup_revalidate()
1590 	if (NFS_SB(dentry->d_sb)->caps & NFS_CAP_ATOMIC_OPEN_V1)  in nfs4_lookup_revalidate()
1593 	inode = d_inode(dentry);  in nfs4_lookup_revalidate()
1599 		struct dentry *parent;  in nfs4_lookup_revalidate()
1603 			parent = ACCESS_ONCE(dentry->d_parent);  in nfs4_lookup_revalidate()
1608 			parent = dget_parent(dentry);  in nfs4_lookup_revalidate()
1611 		if (!nfs_neg_need_reval(dir, dentry, flags))  in nfs4_lookup_revalidate()
1617 		else if (parent != ACCESS_ONCE(dentry->d_parent))  in nfs4_lookup_revalidate()
1636 	return nfs_lookup_revalidate(dentry, flags);  in nfs4_lookup_revalidate()
1644 int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle,  in nfs_instantiate()  argument
1648 	struct dentry *parent = dget_parent(dentry);  in nfs_instantiate()
1653 	d_drop(dentry);  in nfs_instantiate()
1656 	if (d_really_is_positive(dentry))  in nfs_instantiate()
1659 		error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, NULL);  in nfs_instantiate()
1663 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_instantiate()
1665 		struct nfs_server *server = NFS_SB(dentry->d_sb);  in nfs_instantiate()
1670 	inode = nfs_fhget(dentry->d_sb, fhandle, fattr, label);  in nfs_instantiate()
1674 	d_add(dentry, inode);  in nfs_instantiate()
1691 int nfs_create(struct inode *dir, struct dentry *dentry,  in nfs_create()  argument
1699 			dir->i_sb->s_id, dir->i_ino, dentry);  in nfs_create()
1704 	trace_nfs_create_enter(dir, dentry, open_flags);  in nfs_create()
1705 	error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags);  in nfs_create()
1706 	trace_nfs_create_exit(dir, dentry, open_flags, error);  in nfs_create()
1711 	d_drop(dentry);  in nfs_create()
1720 nfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)  in nfs_mknod()  argument
1726 			dir->i_sb->s_id, dir->i_ino, dentry);  in nfs_mknod()
1734 	trace_nfs_mknod_enter(dir, dentry);  in nfs_mknod()
1735 	status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev);  in nfs_mknod()
1736 	trace_nfs_mknod_exit(dir, dentry, status);  in nfs_mknod()
1741 	d_drop(dentry);  in nfs_mknod()
1749 int nfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)  in nfs_mkdir()  argument
1755 			dir->i_sb->s_id, dir->i_ino, dentry);  in nfs_mkdir()
1760 	trace_nfs_mkdir_enter(dir, dentry);  in nfs_mkdir()
1761 	error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr);  in nfs_mkdir()
1762 	trace_nfs_mkdir_exit(dir, dentry, error);  in nfs_mkdir()
1767 	d_drop(dentry);  in nfs_mkdir()
1772 static void nfs_dentry_handle_enoent(struct dentry *dentry)  in nfs_dentry_handle_enoent()  argument
1774 	if (d_really_is_positive(dentry) && !d_unhashed(dentry))  in nfs_dentry_handle_enoent()
1775 		d_delete(dentry);  in nfs_dentry_handle_enoent()
1778 int nfs_rmdir(struct inode *dir, struct dentry *dentry)  in nfs_rmdir()  argument
1783 			dir->i_sb->s_id, dir->i_ino, dentry);  in nfs_rmdir()
1785 	trace_nfs_rmdir_enter(dir, dentry);  in nfs_rmdir()
1786 	if (d_really_is_positive(dentry)) {  in nfs_rmdir()
1787 		nfs_wait_on_sillyrename(dentry);  in nfs_rmdir()
1788 		error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);  in nfs_rmdir()
1792 			clear_nlink(d_inode(dentry));  in nfs_rmdir()
1795 			nfs_dentry_handle_enoent(dentry);  in nfs_rmdir()
1798 		error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);  in nfs_rmdir()
1799 	trace_nfs_rmdir_exit(dir, dentry, error);  in nfs_rmdir()
1812 static int nfs_safe_remove(struct dentry *dentry)  in nfs_safe_remove()  argument
1814 	struct inode *dir = d_inode(dentry->d_parent);  in nfs_safe_remove()
1815 	struct inode *inode = d_inode(dentry);  in nfs_safe_remove()
1818 	dfprintk(VFS, "NFS: safe_remove(%pd2)\n", dentry);  in nfs_safe_remove()
1821 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {  in nfs_safe_remove()
1826 	trace_nfs_remove_enter(dir, dentry);  in nfs_safe_remove()
1829 		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);  in nfs_safe_remove()
1833 		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);  in nfs_safe_remove()
1835 		nfs_dentry_handle_enoent(dentry);  in nfs_safe_remove()
1836 	trace_nfs_remove_exit(dir, dentry, error);  in nfs_safe_remove()
1846 int nfs_unlink(struct inode *dir, struct dentry *dentry)  in nfs_unlink()  argument
1852 		dir->i_ino, dentry);  in nfs_unlink()
1854 	trace_nfs_unlink_enter(dir, dentry);  in nfs_unlink()
1855 	spin_lock(&dentry->d_lock);  in nfs_unlink()
1856 	if (d_count(dentry) > 1) {  in nfs_unlink()
1857 		spin_unlock(&dentry->d_lock);  in nfs_unlink()
1859 		write_inode_now(d_inode(dentry), 0);  in nfs_unlink()
1860 		error = nfs_sillyrename(dir, dentry);  in nfs_unlink()
1863 	if (!d_unhashed(dentry)) {  in nfs_unlink()
1864 		__d_drop(dentry);  in nfs_unlink()
1867 	spin_unlock(&dentry->d_lock);  in nfs_unlink()
1868 	error = nfs_safe_remove(dentry);  in nfs_unlink()
1870 		nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_unlink()
1872 		d_rehash(dentry);  in nfs_unlink()
1874 	trace_nfs_unlink_exit(dir, dentry, error);  in nfs_unlink()
1894 int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)  in nfs_symlink()  argument
1903 		dir->i_ino, dentry, symname);  in nfs_symlink()
1921 	trace_nfs_symlink_enter(dir, dentry);  in nfs_symlink()
1922 	error = NFS_PROTO(dir)->symlink(dir, dentry, page, pathlen, &attr);  in nfs_symlink()
1923 	trace_nfs_symlink_exit(dir, dentry, error);  in nfs_symlink()
1927 			dentry, symname, error);  in nfs_symlink()
1928 		d_drop(dentry);  in nfs_symlink()
1937 	if (!add_to_page_cache_lru(page, d_inode(dentry)->i_mapping, 0,  in nfs_symlink()
1954 nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)  in nfs_link()  argument
1960 		old_dentry, dentry);  in nfs_link()
1962 	trace_nfs_link_enter(inode, dir, dentry);  in nfs_link()
1965 	d_drop(dentry);  in nfs_link()
1966 	error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name);  in nfs_link()
1969 		d_add(dentry, inode);  in nfs_link()
1971 	trace_nfs_link_exit(inode, dir, dentry, error);  in nfs_link()
2000 int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,  in nfs_rename()
2001 		      struct inode *new_dir, struct dentry *new_dentry)  in nfs_rename()
2005 	struct dentry *dentry = NULL, *rehash = NULL;  in nfs_rename()  local
2034 			dentry = d_alloc(new_dentry->d_parent,  in nfs_rename()
2036 			if (!dentry)  in nfs_rename()
2044 			new_dentry = dentry;  in nfs_rename()
2080 	if (dentry)  in nfs_rename()
2081 		dput(dentry);  in nfs_rename()