47 static struct dentry *nfs_lookup(struct inode *, struct dentry *, struct nameidata *);
48 static int nfs_create(struct inode *, struct dentry *, int, struct nameidata *);
49 static int nfs_mkdir(struct inode *, struct dentry *, int);
50 static int nfs_rmdir(struct inode *, struct dentry *);
51 static int nfs_unlink(struct inode *, struct dentry *);
52 static int nfs_symlink(struct inode *, struct dentry *, const char *);
53 static int nfs_link(struct dentry *, struct inode *, struct dentry *);
54 static int nfs_mknod(struct inode *, struct dentry *, int, dev_t);
55 static int nfs_rename(struct inode *, struct dentry *,
56 		      struct inode *, struct dentry *);
57 static int nfs_fsync_dir(struct file *, struct dentry *, int);
107 static struct dentry *nfs_atomic_lookup(struct inode *, struct dentry *, struct nameidata *);
137 			filp->f_path.dentry->d_parent->d_name.name,  in nfs_opendir()
138 			filp->f_path.dentry->d_name.name);  in nfs_opendir()
179 	struct inode	*inode = file->f_path.dentry->d_inode;  in nfs_readdir_filler()
191 	error = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred, desc->entry->cookie, page,  in nfs_readdir_filler()
318 	struct inode	*inode = desc->file->f_path.dentry->d_inode;  in find_dirent_page()
397 static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc);
408 	struct dentry	*dentry = NULL;  in nfs_do_filldir()  local
423 		if (dentry != NULL)  in nfs_do_filldir()
424 			dput(dentry);  in nfs_do_filldir()
425 		dentry = nfs_readdir_lookup(desc);  in nfs_do_filldir()
428 		if (dentry != NULL && dentry->d_inode != NULL) {  in nfs_do_filldir()
429 			d_type = dt_type(dentry->d_inode);  in nfs_do_filldir()
430 			fileid = NFS_FILEID(dentry->d_inode);  in nfs_do_filldir()
450 	if (dentry != NULL)  in nfs_do_filldir()
451 		dput(dentry);  in nfs_do_filldir()
474 	struct inode	*inode = file->f_path.dentry->d_inode;  in uncached_readdir()
490 	status = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred,  in uncached_readdir()
529 	struct dentry	*dentry = filp->f_path.dentry;  in nfs_readdir()  local
530 	struct inode	*inode = dentry->d_inode;  in nfs_readdir()
539 			dentry->d_parent->d_name.name, dentry->d_name.name,  in nfs_readdir()
563 	nfs_block_sillyrename(dentry);  in nfs_readdir()
599 	nfs_unblock_sillyrename(dentry);  in nfs_readdir()
603 			dentry->d_parent->d_name.name, dentry->d_name.name,  in nfs_readdir()
610 	struct dentry *dentry = filp->f_path.dentry;  in nfs_llseek_dir()  local
611 	struct inode *inode = dentry->d_inode;  in nfs_llseek_dir()
614 			dentry->d_parent->d_name.name,  in nfs_llseek_dir()
615 			dentry->d_name.name,  in nfs_llseek_dir()
642 static int nfs_fsync_dir(struct file *filp, struct dentry *dentry, int datasync)  in nfs_fsync_dir()  argument
645 			dentry->d_parent->d_name.name, dentry->d_name.name,  in nfs_fsync_dir()
648 	nfs_inc_stats(dentry->d_inode, NFSIOS_VFSFSYNC);  in nfs_fsync_dir()
672 static int nfs_check_verifier(struct inode *dir, struct dentry *dentry)  in nfs_check_verifier()  argument
674 	if (IS_ROOT(dentry))  in nfs_check_verifier()
678 	if (!nfs_verify_change_attribute(dir, dentry->d_time))  in nfs_check_verifier()
683 	if (!nfs_verify_change_attribute(dir, dentry->d_time))  in nfs_check_verifier()
753 int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,  in nfs_neg_need_reval()  argument
761 	return !nfs_check_verifier(dir, dentry);  in nfs_neg_need_reval()
775 static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd)  in nfs_lookup_revalidate()  argument
779 	struct dentry *parent;  in nfs_lookup_revalidate()
784 	parent = dget_parent(dentry);  in nfs_lookup_revalidate()
787 	inode = dentry->d_inode;  in nfs_lookup_revalidate()
790 		if (nfs_neg_need_reval(dir, dentry, nd))  in nfs_lookup_revalidate()
797 				__func__, dentry->d_parent->d_name.name,  in nfs_lookup_revalidate()
798 				dentry->d_name.name);  in nfs_lookup_revalidate()
806 	if (!nfs_is_exclusive_create(dir, nd) && nfs_check_verifier(dir, dentry)) {  in nfs_lookup_revalidate()
815 	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr);  in nfs_lookup_revalidate()
824 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_lookup_revalidate()
828 			__func__, dentry->d_parent->d_name.name,  in nfs_lookup_revalidate()
829 			dentry->d_name.name);  in nfs_lookup_revalidate()
839 		if (have_submounts(dentry))  in nfs_lookup_revalidate()
841 		shrink_dcache_parent(dentry);  in nfs_lookup_revalidate()
843 	d_drop(dentry);  in nfs_lookup_revalidate()
846 			__func__, dentry->d_parent->d_name.name,  in nfs_lookup_revalidate()
847 			dentry->d_name.name);  in nfs_lookup_revalidate()
854 static int nfs_dentry_delete(struct dentry *dentry)  in nfs_dentry_delete()  argument
857 		dentry->d_parent->d_name.name, dentry->d_name.name,  in nfs_dentry_delete()
858 		dentry->d_flags);  in nfs_dentry_delete()
861 	if (dentry->d_inode != NULL && NFS_STALE(dentry->d_inode))  in nfs_dentry_delete()
864 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {  in nfs_dentry_delete()
868 	if (!(dentry->d_sb->s_flags & MS_ACTIVE)) {  in nfs_dentry_delete()
889 static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)  in nfs_dentry_iput()  argument
895 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {  in nfs_dentry_iput()
897 		nfs_complete_unlink(dentry, inode);  in nfs_dentry_iput()
908 static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)  in nfs_lookup()  argument
910 	struct dentry *res;  in nfs_lookup()
911 	struct dentry *parent;  in nfs_lookup()
918 		dentry->d_parent->d_name.name, dentry->d_name.name);  in nfs_lookup()
922 	if (dentry->d_name.len > NFS_SERVER(dir)->namelen)  in nfs_lookup()
926 	dentry->d_op = NFS_PROTO(dir)->dentry_ops;  in nfs_lookup()
933 		d_instantiate(dentry, NULL);  in nfs_lookup()
938 	parent = dentry->d_parent;  in nfs_lookup()
941 	error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr);  in nfs_lookup()
948 	inode = nfs_fhget(dentry->d_sb, &fhandle, &fattr);  in nfs_lookup()
949 	res = (struct dentry *)inode;  in nfs_lookup()
954 	res = d_materialise_unique(dentry, inode);  in nfs_lookup()
958 		dentry = res;  in nfs_lookup()
960 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_lookup()
968 static int nfs_open_revalidate(struct dentry *, struct nameidata *);
994 static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry, struct nameidata …  in nfs_atomic_lookup()  argument
996 	struct dentry *res = NULL;  in nfs_atomic_lookup()
1000 			dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);  in nfs_atomic_lookup()
1006 	if (dentry->d_name.len > NFS_SERVER(dir)->namelen) {  in nfs_atomic_lookup()
1010 	dentry->d_op = NFS_PROTO(dir)->dentry_ops;  in nfs_atomic_lookup()
1015 		d_instantiate(dentry, NULL);  in nfs_atomic_lookup()
1020 	res = nfs4_atomic_open(dir, dentry, nd);  in nfs_atomic_lookup()
1040 		dentry = res;  in nfs_atomic_lookup()
1044 	return nfs_lookup(dir, dentry, nd);  in nfs_atomic_lookup()
1047 static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)  in nfs_open_revalidate()  argument
1049 	struct dentry *parent = NULL;  in nfs_open_revalidate()
1050 	struct inode *inode = dentry->d_inode;  in nfs_open_revalidate()
1056 	parent = dget_parent(dentry);  in nfs_open_revalidate()
1062 		if (!nfs_neg_need_reval(dir, dentry, nd))  in nfs_open_revalidate()
1082 	ret = nfs4_open_revalidate(dir, dentry, openflags, nd);  in nfs_open_revalidate()
1086 		d_drop(dentry);  in nfs_open_revalidate()
1091 	return nfs_lookup_revalidate(dentry, nd);  in nfs_open_revalidate()
1095 static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc)  in nfs_readdir_lookup()
1097 	struct dentry *parent = desc->file->f_path.dentry;  in nfs_readdir_lookup()
1100 	struct dentry *dentry, *alias;  in nfs_readdir_lookup()  local
1126 	dentry = d_lookup(parent, &name);  in nfs_readdir_lookup()
1127 	if (dentry != NULL) {  in nfs_readdir_lookup()
1129 		if (dentry->d_inode != NULL &&  in nfs_readdir_lookup()
1130 				(NFS_FILEID(dentry->d_inode) == entry->ino ||  in nfs_readdir_lookup()
1131 				d_mountpoint(dentry))) {  in nfs_readdir_lookup()
1133 				return dentry;  in nfs_readdir_lookup()
1134 			if (nfs_compare_fh(NFS_FH(dentry->d_inode),  in nfs_readdir_lookup()
1139 		d_drop(dentry);  in nfs_readdir_lookup()
1140 		dput(dentry);  in nfs_readdir_lookup()
1147 	dentry = d_alloc(parent, &name);  in nfs_readdir_lookup()
1148 	if (dentry == NULL)  in nfs_readdir_lookup()
1150 	dentry->d_op = NFS_PROTO(dir)->dentry_ops;  in nfs_readdir_lookup()
1151 	inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr);  in nfs_readdir_lookup()
1153 		dput(dentry);  in nfs_readdir_lookup()
1157 	alias = d_materialise_unique(dentry, inode);  in nfs_readdir_lookup()
1159 		dput(dentry);  in nfs_readdir_lookup()
1162 		dentry = alias;  in nfs_readdir_lookup()
1166 	nfs_set_verifier(dentry, verf);  in nfs_readdir_lookup()
1167 	return dentry;  in nfs_readdir_lookup()
1173 int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle,  in nfs_instantiate()  argument
1176 	struct dentry *parent = dget_parent(dentry);  in nfs_instantiate()
1181 	d_drop(dentry);  in nfs_instantiate()
1184 	if (dentry->d_inode)  in nfs_instantiate()
1187 		error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr);  in nfs_instantiate()
1191 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_instantiate()
1193 		struct nfs_server *server = NFS_SB(dentry->d_sb);  in nfs_instantiate()
1198 	inode = nfs_fhget(dentry->d_sb, fhandle, fattr);  in nfs_instantiate()
1202 	d_add(dentry, inode);  in nfs_instantiate()
1218 static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,  in nfs_create()  argument
1226 			dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);  in nfs_create()
1234 	error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, nd);  in nfs_create()
1239 	d_drop(dentry);  in nfs_create()
1247 nfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)  in nfs_mknod()  argument
1253 			dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);  in nfs_mknod()
1261 	status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev);  in nfs_mknod()
1266 	d_drop(dentry);  in nfs_mknod()
1273 static int nfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)  in nfs_mkdir()  argument
1279 			dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);  in nfs_mkdir()
1284 	error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr);  in nfs_mkdir()
1289 	d_drop(dentry);  in nfs_mkdir()
1293 static void nfs_dentry_handle_enoent(struct dentry *dentry)  in nfs_dentry_handle_enoent()  argument
1295 	if (dentry->d_inode != NULL && !d_unhashed(dentry))  in nfs_dentry_handle_enoent()
1296 		d_delete(dentry);  in nfs_dentry_handle_enoent()
1299 static int nfs_rmdir(struct inode *dir, struct dentry *dentry)  in nfs_rmdir()  argument
1304 			dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);  in nfs_rmdir()
1306 	error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);  in nfs_rmdir()
1308 	if (error == 0 && dentry->d_inode != NULL)  in nfs_rmdir()
1309 		clear_nlink(dentry->d_inode);  in nfs_rmdir()
1311 		nfs_dentry_handle_enoent(dentry);  in nfs_rmdir()
1316 static int nfs_sillyrename(struct inode *dir, struct dentry *dentry)  in nfs_sillyrename()  argument
1319 	const int      fileidsize  = sizeof(NFS_FILEID(dentry->d_inode))*2;  in nfs_sillyrename()
1324 	struct dentry *sdentry;  in nfs_sillyrename()
1328 		dentry->d_parent->d_name.name, dentry->d_name.name,   in nfs_sillyrename()
1329 		atomic_read(&dentry->d_count));  in nfs_sillyrename()
1336 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED)  in nfs_sillyrename()
1341 		(unsigned long long)NFS_FILEID(dentry->d_inode));  in nfs_sillyrename()
1344 	nfs_inode_return_delegation(dentry->d_inode);  in nfs_sillyrename()
1355 				dentry->d_name.name, silly);  in nfs_sillyrename()
1357 		sdentry = lookup_one_len(silly, dentry->d_parent, slen);  in nfs_sillyrename()
1368 	if (dentry->d_inode) {  in nfs_sillyrename()
1369 		error = NFS_PROTO(dir)->rename(dir, &dentry->d_name,  in nfs_sillyrename()
1371 		nfs_mark_for_revalidate(dentry->d_inode);  in nfs_sillyrename()
1373 		error = NFS_PROTO(dir)->rename(dir, &dentry->d_name,  in nfs_sillyrename()
1376 		nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_sillyrename()
1377 		d_move(dentry, sdentry);  in nfs_sillyrename()
1378 		error = nfs_async_unlink(dir, dentry);  in nfs_sillyrename()
1393 static int nfs_safe_remove(struct dentry *dentry)  in nfs_safe_remove()  argument
1395 	struct inode *dir = dentry->d_parent->d_inode;  in nfs_safe_remove()
1396 	struct inode *inode = dentry->d_inode;  in nfs_safe_remove()
1400 		dentry->d_parent->d_name.name, dentry->d_name.name);  in nfs_safe_remove()
1403 	if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {  in nfs_safe_remove()
1410 		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);  in nfs_safe_remove()
1416 		error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);  in nfs_safe_remove()
1418 		nfs_dentry_handle_enoent(dentry);  in nfs_safe_remove()
1428 static int nfs_unlink(struct inode *dir, struct dentry *dentry)  in nfs_unlink()  argument
1434 		dir->i_ino, dentry->d_name.name);  in nfs_unlink()
1437 	spin_lock(&dentry->d_lock);  in nfs_unlink()
1438 	if (atomic_read(&dentry->d_count) > 1) {  in nfs_unlink()
1439 		spin_unlock(&dentry->d_lock);  in nfs_unlink()
1442 		write_inode_now(dentry->d_inode, 0);  in nfs_unlink()
1443 		error = nfs_sillyrename(dir, dentry);  in nfs_unlink()
1446 	if (!d_unhashed(dentry)) {  in nfs_unlink()
1447 		__d_drop(dentry);  in nfs_unlink()
1450 	spin_unlock(&dentry->d_lock);  in nfs_unlink()
1452 	error = nfs_safe_remove(dentry);  in nfs_unlink()
1454 		nfs_set_verifier(dentry, nfs_save_change_attribute(dir));  in nfs_unlink()
1456 		d_rehash(dentry);  in nfs_unlink()
1475 static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)  in nfs_symlink()  argument
1485 		dir->i_ino, dentry->d_name.name, symname);  in nfs_symlink()
1503 	error = NFS_PROTO(dir)->symlink(dir, dentry, page, pathlen, &attr);  in nfs_symlink()
1507 			dentry->d_name.name, symname, error);  in nfs_symlink()
1508 		d_drop(dentry);  in nfs_symlink()
1518 	if (!add_to_page_cache(page, dentry->d_inode->i_mapping, 0,  in nfs_symlink()
1531 nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)  in nfs_link()  argument
1538 		dentry->d_parent->d_name.name, dentry->d_name.name);  in nfs_link()
1540 	d_drop(dentry);  in nfs_link()
1541 	error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name);  in nfs_link()
1544 		d_add(dentry, inode);  in nfs_link()
1573 static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,  in nfs_rename()
1574 		      struct inode *new_dir, struct dentry *new_dentry)  in nfs_rename()
1578 	struct dentry *dentry = NULL, *rehash = NULL;  in nfs_rename()  local
1612 		dentry = d_alloc(new_dentry->d_parent,  in nfs_rename()
1614 		if (!dentry)  in nfs_rename()
1620 			new_dentry = rehash = dentry;  in nfs_rename()
1660 	if (dentry)  in nfs_rename()
1661 		dput(dentry);  in nfs_rename()