53 static int nfs_opendir(struct inode *, struct file *);
54 static int nfs_closedir(struct inode *, struct file *);
76 alloc_nfs_open_dir_context(struct inode *dir)  in alloc_nfs_open_dir_context()
99 static void put_nfs_open_dir_context(struct inode *dir, struct nfs_open_dir_context *ctx)  in put_nfs_open_dir_context()
111 nfs_opendir(struct inode *inode, struct file *filp)  in nfs_opendir()  argument
118 	nfs_inc_stats(inode, NFSIOS_VFSOPEN);  in nfs_opendir()
120 	ctx = alloc_nfs_open_dir_context(inode);  in nfs_opendir()
131 nfs_closedir(struct inode *inode, struct file *filp)  in nfs_closedir()  argument
585 	struct inode *inode = file_inode(desc->file);  in nfs_readdir_xdr_filler()  local
604 	desc->dir_verifier = nfs_save_change_attribute(inode);  in nfs_readdir_xdr_filler()
605 	error = NFS_PROTO(inode)->readdir(&arg, &res);  in nfs_readdir_xdr_filler()
609 			NFS_SERVER(inode)->caps &= ~NFS_CAP_READDIRPLUS;  in nfs_readdir_xdr_filler()
624 	struct inode *inode = file_inode(desc->file);  in xdr_decode()  local
627 	error = NFS_PROTO(inode)->decode_dirent(xdr, entry, desc->plus);  in xdr_decode()
641 	struct inode *inode;  in nfs_same_file()  local
647 	inode = d_inode(dentry);  in nfs_same_file()
648 	if (is_bad_inode(inode) || NFS_STALE(inode))  in nfs_same_file()
651 	nfsi = NFS_I(inode);  in nfs_same_file()
661 static bool nfs_use_readdirplus(struct inode *dir, struct dir_context *ctx,  in nfs_use_readdirplus()
678 void nfs_readdir_record_entry_cache_hit(struct inode *dir)  in nfs_readdir_record_entry_cache_hit()
697 void nfs_readdir_record_entry_cache_miss(struct inode *dir)  in nfs_readdir_record_entry_cache_miss()
711 static void nfs_lookup_advise_force_readdirplus(struct inode *dir,  in nfs_lookup_advise_force_readdirplus()
729 	struct inode *inode;  in nfs_prime_dcache()  local
788 	inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr);  in nfs_prime_dcache()
789 	alias = d_splice_alias(inode, dentry);  in nfs_prime_dcache()
935 	struct inode *inode = file_inode(desc->file);  in nfs_readdir_xdr_to_array()  local
945 	entry->fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode));  in nfs_readdir_xdr_to_array()
946 	entry->server = NFS_SERVER(inode);  in nfs_readdir_xdr_to_array()
955 	change_attr = inode_peek_iversion_raw(inode);  in nfs_readdir_xdr_to_array()
1013 	struct inode *inode = file_inode(desc->file);  in find_and_lock_cache_page()  local
1014 	struct nfs_inode *nfsi = NFS_I(inode);  in find_and_lock_cache_page()
1033 			trace_nfs_readdir_cache_fill_done(inode, res);  in find_and_lock_cache_page()
1038 					inode, 0, MAX_LFS_FILESIZE);  in find_and_lock_cache_page()
1053 				inode, 1, MAX_LFS_FILESIZE);  in find_and_lock_cache_page()
1202 static bool nfs_readdir_handle_cache_misses(struct inode *inode,  in nfs_readdir_handle_cache_misses()  argument
1211 	trace_nfs_readdir_force_readdirplus(inode);  in nfs_readdir_handle_cache_misses()
1222 	struct inode	*inode = d_inode(dentry);  in nfs_readdir()  local
1223 	struct nfs_inode *nfsi = NFS_I(inode);  in nfs_readdir()
1232 	nfs_inc_stats(inode, NFSIOS_VFSGETDENTS);  in nfs_readdir()
1240 	nfs_revalidate_mapping(inode, file->f_mapping);  in nfs_readdir()
1268 	desc->plus = nfs_use_readdirplus(inode, ctx, cache_hits, cache_misses);  in nfs_readdir()
1269 	force_clear = nfs_readdir_handle_cache_misses(inode, desc, cache_misses,  in nfs_readdir()
1290 			nfs_zap_caches(inode);  in nfs_readdir()
1389 void nfs_force_lookup_revalidate(struct inode *dir)  in nfs_force_lookup_revalidate()
1404 static bool nfs_verify_change_attribute(struct inode *dir, unsigned long verf)  in nfs_verify_change_attribute()
1433 	struct inode *inode = d_inode(dentry);  in nfs_set_verifier_locked()  local
1434 	struct inode *dir = d_inode(dentry->d_parent);  in nfs_set_verifier_locked()
1438 	if (inode && NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))  in nfs_set_verifier_locked()
1473 void nfs_clear_verifier_delegated(struct inode *inode)  in nfs_clear_verifier_delegated()  argument
1477 	if (!inode)  in nfs_clear_verifier_delegated()
1479 	spin_lock(&inode->i_lock);  in nfs_clear_verifier_delegated()
1480 	hlist_for_each_entry(alias, &inode->i_dentry, d_u.d_alias) {  in nfs_clear_verifier_delegated()
1485 	spin_unlock(&inode->i_lock);  in nfs_clear_verifier_delegated()
1490 static int nfs_dentry_verify_change(struct inode *dir, struct dentry *dentry)  in nfs_dentry_verify_change()
1504 static int nfs_check_verifier(struct inode *dir, struct dentry *dentry,  in nfs_check_verifier()
1529 static int nfs_is_exclusive_create(struct inode *dir, unsigned int flags)  in nfs_is_exclusive_create()
1545 int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)  in nfs_lookup_verify_inode()  argument
1547 	struct nfs_server *server = NFS_SERVER(inode);  in nfs_lookup_verify_inode()
1550 	if (IS_AUTOMOUNT(inode))  in nfs_lookup_verify_inode()
1554 		switch (inode->i_mode & S_IFMT) {  in nfs_lookup_verify_inode()
1572 	if (inode->i_nlink > 0 ||  in nfs_lookup_verify_inode()
1573 	    (inode->i_nlink == 0 &&  in nfs_lookup_verify_inode()
1574 	     test_bit(NFS_INO_PRESERVE_UNLINKED, &NFS_I(inode)->flags)))  in nfs_lookup_verify_inode()
1581 	ret = __nfs_revalidate_inode(server, inode);  in nfs_lookup_verify_inode()
1587 static void nfs_mark_dir_for_revalidate(struct inode *inode)  in nfs_mark_dir_for_revalidate()  argument
1589 	spin_lock(&inode->i_lock);  in nfs_mark_dir_for_revalidate()
1590 	nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);  in nfs_mark_dir_for_revalidate()
1591 	spin_unlock(&inode->i_lock);  in nfs_mark_dir_for_revalidate()
1608 int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,  in nfs_neg_need_reval()
1622 nfs_lookup_revalidate_done(struct inode *dir, struct dentry *dentry,  in nfs_lookup_revalidate_done()
1623 			   struct inode *inode, int error)  in nfs_lookup_revalidate_done()  argument
1635 		if (inode && IS_ROOT(dentry))  in nfs_lookup_revalidate_done()
1644 nfs_lookup_revalidate_negative(struct inode *dir, struct dentry *dentry,  in nfs_lookup_revalidate_negative()
1657 nfs_lookup_revalidate_delegated(struct inode *dir, struct dentry *dentry,  in nfs_lookup_revalidate_delegated()
1658 				struct inode *inode)  in nfs_lookup_revalidate_delegated()  argument
1661 	return nfs_lookup_revalidate_done(dir, dentry, inode, 1);  in nfs_lookup_revalidate_delegated()
1664 static int nfs_lookup_revalidate_dentry(struct inode *dir,  in nfs_lookup_revalidate_dentry()
1666 					struct inode *inode, unsigned int flags)  in nfs_lookup_revalidate_dentry()  argument
1677 	fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode));  in nfs_lookup_revalidate_dentry()
1690 			if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL)  in nfs_lookup_revalidate_dentry()
1700 	if (nfs_compare_fh(NFS_FH(inode), fhandle))  in nfs_lookup_revalidate_dentry()
1702 	if (nfs_refresh_inode(inode, fattr) < 0)  in nfs_lookup_revalidate_dentry()
1705 	nfs_setsecurity(inode, fattr);  in nfs_lookup_revalidate_dentry()
1719 	return nfs_lookup_revalidate_done(dir, dentry, inode, ret);  in nfs_lookup_revalidate_dentry()
1734 nfs_do_lookup_revalidate(struct inode *dir, struct dentry *dentry,  in nfs_do_lookup_revalidate()
1737 	struct inode *inode;  in nfs_do_lookup_revalidate()  local
1741 	inode = d_inode(dentry);  in nfs_do_lookup_revalidate()
1743 	if (!inode)  in nfs_do_lookup_revalidate()
1746 	if (is_bad_inode(inode)) {  in nfs_do_lookup_revalidate()
1757 		return nfs_lookup_revalidate_delegated(dir, dentry, inode);  in nfs_do_lookup_revalidate()
1762 		error = nfs_lookup_verify_inode(inode, flags);  in nfs_do_lookup_revalidate()
1774 	if (NFS_STALE(inode))  in nfs_do_lookup_revalidate()
1777 	return nfs_lookup_revalidate_dentry(dir, dentry, inode, flags);  in nfs_do_lookup_revalidate()
1779 	return nfs_lookup_revalidate_done(dir, dentry, inode, 1);  in nfs_do_lookup_revalidate()
1783 	return nfs_lookup_revalidate_done(dir, dentry, inode, 0);  in nfs_do_lookup_revalidate()
1788 			int (*reval)(struct inode *, struct dentry *, unsigned int))  in __nfs_lookup_revalidate()  argument
1791 	struct inode *dir;  in __nfs_lookup_revalidate()
1855 	struct inode *inode = d_inode(dentry);  in nfs_weak_revalidate()  local
1863 	if (!inode) {  in nfs_weak_revalidate()
1869 	if (is_bad_inode(inode)) {  in nfs_weak_revalidate()
1875 	error = nfs_lookup_verify_inode(inode, flags);  in nfs_weak_revalidate()
1877 			__func__, inode->i_ino, error ? "invalid" : "valid");  in nfs_weak_revalidate()
1907 static void nfs_drop_nlink(struct inode *inode)  in nfs_drop_nlink()  argument
1909 	spin_lock(&inode->i_lock);  in nfs_drop_nlink()
1911 	if (inode->i_nlink > 0)  in nfs_drop_nlink()
1912 		drop_nlink(inode);  in nfs_drop_nlink()
1913 	NFS_I(inode)->attr_gencount = nfs_inc_attr_generation_counter();  in nfs_drop_nlink()
1915 		inode, NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME |  in nfs_drop_nlink()
1917 	spin_unlock(&inode->i_lock);  in nfs_drop_nlink()
1924 static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)  in nfs_dentry_iput()  argument
1927 		nfs_complete_unlink(dentry, inode);  in nfs_dentry_iput()
1928 		nfs_drop_nlink(inode);  in nfs_dentry_iput()
1930 	iput(inode);  in nfs_dentry_iput()
1954 struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)  in nfs_lookup()
1957 	struct inode *inode = NULL;  in nfs_lookup()  local
1994 	inode = nfs_fhget(dentry->d_sb, fhandle, fattr);  in nfs_lookup()
1995 	res = ERR_CAST(inode);  in nfs_lookup()
2003 	res = d_splice_alias(inode, dentry);  in nfs_lookup()
2018 void nfs_d_prune_case_insensitive_aliases(struct inode *inode)  in nfs_d_prune_case_insensitive_aliases()  argument
2021 	if (inode && nfs_server_capable(inode, NFS_CAP_CASE_INSENSITIVE))  in nfs_d_prune_case_insensitive_aliases()
2022 		d_prune_aliases(inode);  in nfs_d_prune_case_insensitive_aliases()
2044 static int do_open(struct inode *inode, struct file *filp)  in do_open()  argument
2046 	nfs_fscache_open_file(inode, filp);  in do_open()
2067 int nfs_atomic_open(struct inode *dir, struct dentry *dentry,  in nfs_atomic_open()
2075 	struct inode *inode;  in nfs_atomic_open()  local
2140 	inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr, &created);  in nfs_atomic_open()
2143 	if (IS_ERR(inode)) {  in nfs_atomic_open()
2144 		err = PTR_ERR(inode);  in nfs_atomic_open()
2185 		inode = d_inode(dentry);  in nfs_atomic_open()
2186 		if ((lookup_flags & LOOKUP_DIRECTORY) && inode &&  in nfs_atomic_open()
2187 		    !(S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)))  in nfs_atomic_open()
2189 		else if (inode && S_ISREG(inode->i_mode))  in nfs_atomic_open()
2192 		inode = d_inode(res);  in nfs_atomic_open()
2193 		if ((lookup_flags & LOOKUP_DIRECTORY) && inode &&  in nfs_atomic_open()
2194 		    !(S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) {  in nfs_atomic_open()
2197 		} else if (inode && S_ISREG(inode->i_mode)) {  in nfs_atomic_open()
2216 nfs4_do_lookup_revalidate(struct inode *dir, struct dentry *dentry,  in nfs4_do_lookup_revalidate()
2219 	struct inode *inode;  in nfs4_do_lookup_revalidate()  local
2226 	inode = d_inode(dentry);  in nfs4_do_lookup_revalidate()
2231 	if (inode == NULL)  in nfs4_do_lookup_revalidate()
2235 		return nfs_lookup_revalidate_delegated(dir, dentry, inode);  in nfs4_do_lookup_revalidate()
2238 	if (!S_ISREG(inode->i_mode))  in nfs4_do_lookup_revalidate()
2254 	return nfs_lookup_revalidate_dentry(dir, dentry, inode, flags);  in nfs4_do_lookup_revalidate()
2273 	struct inode *dir = d_inode(parent);  in nfs_add_or_obtain()
2274 	struct inode *inode;  in nfs_add_or_obtain()  local
2293 	inode = nfs_fhget(dentry->d_sb, fhandle, fattr);  in nfs_add_or_obtain()
2294 	d = d_splice_alias(inode, dentry);  in nfs_add_or_obtain()
2328 int nfs_create(struct mnt_idmap *idmap, struct inode *dir,  in nfs_create()
2357 nfs_mknod(struct mnt_idmap *idmap, struct inode *dir,  in nfs_mknod()
2384 int nfs_mkdir(struct mnt_idmap *idmap, struct inode *dir,  in nfs_mkdir()
2414 static void nfs_dentry_remove_handle_error(struct inode *dir,  in nfs_dentry_remove_handle_error()
2429 int nfs_rmdir(struct inode *dir, struct dentry *dentry)  in nfs_rmdir()
2467 	struct inode *dir = d_inode(dentry->d_parent);  in nfs_safe_remove()
2468 	struct inode *inode = d_inode(dentry);  in nfs_safe_remove()  local
2480 	if (inode != NULL) {  in nfs_safe_remove()
2483 			nfs_drop_nlink(inode);  in nfs_safe_remove()
2498 int nfs_unlink(struct inode *dir, struct dentry *dentry)  in nfs_unlink()
2553 int nfs_symlink(struct mnt_idmap *idmap, struct inode *dir,  in nfs_symlink()
2615 nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)  in nfs_link()
2617 	struct inode *inode = d_inode(old_dentry);  in nfs_link()  local
2623 	trace_nfs_link_enter(inode, dir, dentry);  in nfs_link()
2625 	if (S_ISREG(inode->i_mode))  in nfs_link()
2626 		nfs_sync_inode(inode);  in nfs_link()
2627 	error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name);  in nfs_link()
2630 		ihold(inode);  in nfs_link()
2631 		d_add(dentry, inode);  in nfs_link()
2633 	trace_nfs_link_exit(inode, dir, dentry, error);  in nfs_link()
2670 int nfs_rename(struct mnt_idmap *idmap, struct inode *old_dir,  in nfs_rename()
2671 	       struct dentry *old_dentry, struct inode *new_dir,  in nfs_rename()
2674 	struct inode *old_inode = d_inode(old_dentry);  in nfs_rename()
2675 	struct inode *new_inode = d_inode(new_dentry);  in nfs_rename()
2824 		struct inode *inode;  in nfs_do_access_cache_scan()  local
2828 		inode = &nfsi->vfs_inode;  in nfs_do_access_cache_scan()
2829 		spin_lock(&inode->i_lock);  in nfs_do_access_cache_scan()
2847 		spin_unlock(&inode->i_lock);  in nfs_do_access_cache_scan()
2903 void nfs_access_zap_cache(struct inode *inode)  in nfs_access_zap_cache()  argument
2907 	if (test_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags) == 0)  in nfs_access_zap_cache()
2911 	if (test_and_clear_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags))  in nfs_access_zap_cache()
2912 		list_del_init(&NFS_I(inode)->access_cache_inode_lru);  in nfs_access_zap_cache()
2914 	spin_lock(&inode->i_lock);  in nfs_access_zap_cache()
2915 	__nfs_access_zap_cache(NFS_I(inode), &head);  in nfs_access_zap_cache()
2916 	spin_unlock(&inode->i_lock);  in nfs_access_zap_cache()
2959 static struct nfs_access_entry *nfs_access_search_rbtree(struct inode *inode, const struct cred *cr…  in nfs_access_search_rbtree()  argument
2961 	struct rb_node *n = NFS_I(inode)->access_cache.rb_node;  in nfs_access_search_rbtree()
2998 static int nfs_access_get_cached_locked(struct inode *inode, const struct cred *cred, u32 *mask, bo…  in nfs_access_get_cached_locked()  argument
3000 	struct nfs_inode *nfsi = NFS_I(inode);  in nfs_access_get_cached_locked()
3006 	spin_lock(&inode->i_lock);  in nfs_access_get_cached_locked()
3010 		cache = nfs_access_search_rbtree(inode, cred);  in nfs_access_get_cached_locked()
3015 		if (!nfs_check_cache_invalid(inode, NFS_INO_INVALID_ACCESS))  in nfs_access_get_cached_locked()
3022 		spin_unlock(&inode->i_lock);  in nfs_access_get_cached_locked()
3023 		err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);  in nfs_access_get_cached_locked()
3026 		spin_lock(&inode->i_lock);  in nfs_access_get_cached_locked()
3036 	spin_unlock(&inode->i_lock);  in nfs_access_get_cached_locked()
3039 	spin_unlock(&inode->i_lock);  in nfs_access_get_cached_locked()
3040 	nfs_access_zap_cache(inode);  in nfs_access_get_cached_locked()
3044 static int nfs_access_get_cached_rcu(struct inode *inode, const struct cred *cred, u32 *mask)  in nfs_access_get_cached_rcu()  argument
3049 	struct nfs_inode *nfsi = NFS_I(inode);  in nfs_access_get_cached_rcu()
3067 	if (nfs_check_cache_invalid(inode, NFS_INO_INVALID_ACCESS))  in nfs_access_get_cached_rcu()
3076 int nfs_access_get_cached(struct inode *inode, const struct cred *cred,  in nfs_access_get_cached()  argument
3081 	status = nfs_access_get_cached_rcu(inode, cred, mask);  in nfs_access_get_cached()
3083 		status = nfs_access_get_cached_locked(inode, cred, mask,  in nfs_access_get_cached()
3090 static void nfs_access_add_rbtree(struct inode *inode,  in nfs_access_add_rbtree()  argument
3094 	struct nfs_inode *nfsi = NFS_I(inode);  in nfs_access_add_rbtree()
3101 	spin_lock(&inode->i_lock);  in nfs_access_add_rbtree()
3117 	spin_unlock(&inode->i_lock);  in nfs_access_add_rbtree()
3123 	spin_unlock(&inode->i_lock);  in nfs_access_add_rbtree()
3127 void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set,  in nfs_access_add_cache()  argument
3145 	nfs_access_add_rbtree(inode, cache, cred);  in nfs_access_add_cache()
3153 	if (!test_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags)) {  in nfs_access_add_cache()
3155 		if (!test_and_set_bit(NFS_INO_ACL_LRU_SET, &NFS_I(inode)->flags))  in nfs_access_add_cache()
3156 			list_add_tail(&NFS_I(inode)->access_cache_inode_lru,  in nfs_access_add_cache()
3201 static int nfs_do_access(struct inode *inode, const struct cred *cred, int mask)  in nfs_do_access()  argument
3208 	trace_nfs_access_enter(inode);  in nfs_do_access()
3210 	status = nfs_access_get_cached(inode, cred, &cache.mask, may_block);  in nfs_do_access()
3222 		     nfs_access_xattr_mask(NFS_SERVER(inode));  in nfs_do_access()
3223 	if (S_ISDIR(inode->i_mode))  in nfs_do_access()
3227 	status = NFS_PROTO(inode)->access(inode, &cache, cred);  in nfs_do_access()
3230 			if (!S_ISDIR(inode->i_mode))  in nfs_do_access()
3231 				nfs_set_inode_stale(inode);  in nfs_do_access()
3233 				nfs_zap_caches(inode);  in nfs_do_access()
3237 	nfs_access_add_cache(inode, &cache, cred);  in nfs_do_access()
3239 	cache_mask = nfs_access_calc_mask(cache.mask, inode->i_mode);  in nfs_do_access()
3243 	trace_nfs_access_exit(inode, mask, cache_mask, status);  in nfs_do_access()
3264 int nfs_may_open(struct inode *inode, const struct cred *cred, int openflags)  in nfs_may_open()  argument
3266 	return nfs_do_access(inode, cred, nfs_open_permission_mask(openflags));  in nfs_may_open()
3270 static int nfs_execute_ok(struct inode *inode, int mask)  in nfs_execute_ok()  argument
3272 	struct nfs_server *server = NFS_SERVER(inode);  in nfs_execute_ok()
3275 	if (S_ISDIR(inode->i_mode))  in nfs_execute_ok()
3277 	if (nfs_check_cache_invalid(inode, NFS_INO_INVALID_MODE)) {  in nfs_execute_ok()
3280 		ret = __nfs_revalidate_inode(server, inode);  in nfs_execute_ok()
3282 	if (ret == 0 && !execute_ok(inode))  in nfs_execute_ok()
3288 		   struct inode *inode,  in nfs_permission()  argument
3294 	nfs_inc_stats(inode, NFSIOS_VFSACCESS);  in nfs_permission()
3302 	switch (inode->i_mode & S_IFMT) {  in nfs_permission()
3307 			   nfs_server_capable(inode, NFS_CAP_ATOMIC_OPEN))  in nfs_permission()
3320 	if (!NFS_PROTO(inode)->access)  in nfs_permission()
3323 	res = nfs_do_access(inode, cred, mask);  in nfs_permission()
3326 		res = nfs_execute_ok(inode, mask);  in nfs_permission()
3329 		inode->i_sb->s_id, inode->i_ino, mask, res);  in nfs_permission()
3335 	res = nfs_revalidate_inode(inode, NFS_INO_INVALID_MODE |  in nfs_permission()
3338 		res = generic_permission(&nop_mnt_idmap, inode, mask);  in nfs_permission()