28  * Global file hash table
46 static inline void nlm_debug_print_file(char *msg, struct nlm_file *file)  in nlm_debug_print_file()  argument
48 	struct inode *inode = file->f_file->f_path.dentry->d_inode;  in nlm_debug_print_file()
59 static inline void nlm_debug_print_file(char *msg, struct nlm_file *file)  in nlm_debug_print_file()  argument
75  * Lookup file info. If it doesn't exist, create a file info struct
76  * and open a (VFS) file for the given inode.
79  * Note that we open the file O_RDONLY even when creating write locks.
88 	struct nlm_file	*file;  in nlm_lookup_file()  local
96 	/* Lock file table */  in nlm_lookup_file()
99 	hlist_for_each_entry(file, pos, &nlm_files[hash], f_list)  in nlm_lookup_file()
100 		if (!nfs_compare_fh(&file->f_handle, f))  in nlm_lookup_file()
103 	nlm_debug_print_fh("creating file for", f);  in nlm_lookup_file()
106 	file = kzalloc(sizeof(*file), GFP_KERNEL);  in nlm_lookup_file()
107 	if (!file)  in nlm_lookup_file()
110 	memcpy(&file->f_handle, f, sizeof(struct nfs_fh));  in nlm_lookup_file()
111 	mutex_init(&file->f_mutex);  in nlm_lookup_file()
112 	INIT_HLIST_NODE(&file->f_list);  in nlm_lookup_file()
113 	INIT_LIST_HEAD(&file->f_blocks);  in nlm_lookup_file()
115 	/* Open the file. Note that this must not sleep for too long, else  in nlm_lookup_file()
119 	 * the file.  in nlm_lookup_file()
121 	if ((nfserr = nlmsvc_ops->fopen(rqstp, f, &file->f_file)) != 0) {  in nlm_lookup_file()
126 	hlist_add_head(&file->f_list, &nlm_files[hash]);  in nlm_lookup_file()
129 	dprintk("lockd: found file %p (count %d)\n", file, file->f_count);  in nlm_lookup_file()
130 	*result = file;  in nlm_lookup_file()
131 	file->f_count++;  in nlm_lookup_file()
139 	kfree(file);  in nlm_lookup_file()
144  * Delete a file after having released all locks, blocks and shares
147 nlm_delete_file(struct nlm_file *file)  in nlm_delete_file()  argument
149 	nlm_debug_print_file("closing file", file);  in nlm_delete_file()
150 	if (!hlist_unhashed(&file->f_list)) {  in nlm_delete_file()
151 		hlist_del(&file->f_list);  in nlm_delete_file()
152 		nlmsvc_ops->fclose(file->f_file);  in nlm_delete_file()
153 		kfree(file);  in nlm_delete_file()
155 		printk(KERN_WARNING "lockd: attempt to release unknown file!\n");  in nlm_delete_file()
160  * Loop over all locks on the given file and perform the specified
164 nlm_traverse_locks(struct nlm_host *host, struct nlm_file *file,  in nlm_traverse_locks()  argument
167 	struct inode	 *inode = nlmsvc_file_inode(file);  in nlm_traverse_locks()
172 	file->f_locks = 0;  in nlm_traverse_locks()
179 		file->f_locks++;  in nlm_traverse_locks()
189 			if (vfs_lock_file(file->f_file, F_SETLK, &lock, NULL) < 0) {  in nlm_traverse_locks()
209  * Inspect a single file
212 nlm_inspect_file(struct nlm_host *host, struct nlm_file *file, nlm_host_match_fn_t match)  in nlm_inspect_file()  argument
214 	nlmsvc_traverse_blocks(host, file, match);  in nlm_inspect_file()
215 	nlmsvc_traverse_shares(host, file, match);  in nlm_inspect_file()
216 	return nlm_traverse_locks(host, file, match);  in nlm_inspect_file()
221  * shares on a given file.
224 nlm_file_inuse(struct nlm_file *file)  in nlm_file_inuse()  argument
226 	struct inode	 *inode = nlmsvc_file_inode(file);  in nlm_file_inuse()
229 	if (file->f_count || !list_empty(&file->f_blocks) || file->f_shares)  in nlm_file_inuse()
240 	file->f_locks = 0;  in nlm_file_inuse()
245  * Loop over all files in the file table.
249 		int (*is_failover_file)(void *data, struct nlm_file *file))  in nlm_traverse_files()  argument
252 	struct nlm_file	*file;  in nlm_traverse_files()  local
257 		hlist_for_each_entry_safe(file, pos, next, &nlm_files[i], f_list) {  in nlm_traverse_files()
258 			if (is_failover_file && !is_failover_file(data, file))  in nlm_traverse_files()
260 			file->f_count++;  in nlm_traverse_files()
263 			/* Traverse locks, blocks and shares of this file  in nlm_traverse_files()
264 			 * and update file->f_locks count */  in nlm_traverse_files()
265 			if (nlm_inspect_file(data, file, match))  in nlm_traverse_files()
269 			file->f_count--;  in nlm_traverse_files()
270 			/* No more references to this file. Let go of it. */  in nlm_traverse_files()
271 			if (list_empty(&file->f_blocks) && !file->f_locks  in nlm_traverse_files()
272 			 && !file->f_shares && !file->f_count) {  in nlm_traverse_files()
273 				hlist_del(&file->f_list);  in nlm_traverse_files()
274 				nlmsvc_ops->fclose(file->f_file);  in nlm_traverse_files()
275 				kfree(file);  in nlm_traverse_files()
284  * Release file. If there are no more remote locks on this file,
293 nlm_release_file(struct nlm_file *file)  in nlm_release_file()  argument
296 				file, file->f_count);  in nlm_release_file()
298 	/* Lock file table */  in nlm_release_file()
301 	/* If there are no more locks etc, delete the file */  in nlm_release_file()
302 	if (--file->f_count == 0 && !nlm_file_inuse(file))  in nlm_release_file()
303 		nlm_delete_file(file);  in nlm_release_file()
402 nlmsvc_match_sb(void *datap, struct nlm_file *file)  in nlmsvc_match_sb()  argument
406 	return sb == file->f_file->f_path.dentry->d_sb;  in nlmsvc_match_sb()
410  * nlmsvc_unlock_all_by_sb - release locks held on this file system
413  * Release all locks held by clients accessing this file system.