fs/nfsd/nfsctl.c

62 static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
63 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
64 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
65 static ssize_t write_threads(struct file *file, char *buf, size_t size);
66 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
67 static ssize_t write_versions(struct file *file, char *buf, size_t size);
68 static ssize_t write_ports(struct file *file, char *buf, size_t size);
69 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
71 static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
72 static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
74 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
76 static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size);
79 static ssize_t (*const write_op[])(struct file *, char *, size_t) = {
98 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
100 	ino_t ino =  file_inode(file)->i_ino;
107 	data = simple_transaction_get(file, buf, size);
111 	rv = write_op[ino](file, data, size);
115 	simple_transaction_set(file, rv);
119 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
121 	if (! file->private_data) {
122 		/* An attempt to read a transaction file without writing
123 		 * causes a 0-byte write so that the file can return
126 		ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
130 	return simple_transaction_read(file, buf, size, pos);
140 static int exports_net_open(struct net *net, struct file *file)
146 	err = seq_open(file, &nfs_exports_op);
150 	seq = file->private_data;
155 static int exports_nfsd_open(struct inode *inode, struct file *file)
157 	return exports_net_open(inode->i_sb->s_fs_info, file);
175 static int nfsd_pool_stats_open(struct inode *inode, struct file *file)
179 	return svc_pool_stats_open(&nn->nfsd_info, file);
198 static inline struct net *netns(struct file *file)
200 	return file_inode(file)->i_sb->s_fs_info;
217 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
223 	struct net *net = netns(file);
244  * write_unlock_fs - Release all locks on a local file system
250  *				absolute pathname of a local file system
257 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
273 	trace_nfsd_ctl_unlock_fs(netns(file), fo_path);
280 	 * releasing locks on the wrong file system.
285 	 * 3.  Is that directory the root of an exported file system?
288 	nfsd4_revoke_states(netns(file), path.dentry->d_sb);
295  * write_filehandle - Get a variable-length NFS file handle by path
311  *			of the NFS file handle;
315 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
352 	trace_nfsd_ctl_filehandle(netns(file), dname, path, maxsize);
359 	len = exp_rootfh(netns(file), dom, path, &fh, maxsize);
399 static ssize_t write_threads(struct file *file, char *buf, size_t size)
403 	struct net *net = netns(file);
414 		rv = nfsd_svc(1, &newthreads, net, file->f_cred, NULL);
446 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
457 	struct net *net = netns(file);
464 		 * writing to the threads file but NOT the pool_threads
465 		 * file, sorry.  Report zero threads.
542 static ssize_t __write_versions(struct file *file, char *buf, size_t size)
549 	struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
561 		trace_nfsd_ctl_version(netns(file), buf);
678 static ssize_t write_versions(struct file *file, char *buf, size_t size)
683 	rv = __write_versions(file, buf, size);
779 static ssize_t __write_ports(struct file *file, char *buf, size_t size,
786 		return __write_ports_addfd(buf, net, file->f_cred);
789 		return __write_ports_addxprt(buf, net, file->f_cred);
795  * write_ports - Pass a socket file descriptor or transport name to listen on
837 static ssize_t write_ports(struct file *file, char *buf, size_t size)
842 	rv = __write_ports(file, buf, size, netns(file));
871 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
874 	struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
881 		trace_nfsd_ctl_maxblksize(netns(file), bsize);
903 static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size,
906 	struct dentry *dentry = file_dentry(file);
916 		trace_nfsd_ctl_time(netns(file), dentry->d_name.name,
939 static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size,
945 	rv = __nfsd4_write_time(file, buf, size, time, nn);
971 static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
973 	struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
974 	return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn);
987 static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
989 	struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
990 	return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn);
994 static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size,
1012 		trace_nfsd_ctl_recoverydir(netns(file), recdir);
1034  *					of the directory on a local file
1044 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1047 	struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
1050 	rv = __write_recoverydir(file, buf, size, nn);
1073  *			'1' to the file will end the grace period for nfsd's v4
1076 static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size)
1078 	struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
1087 			trace_nfsd_end_grace(netns(file));
1317 		/* Per-export io stats use same ops as exports file */
1402 static int exports_proc_open(struct inode *inode, struct file *file)
1404 	return exports_net_open(current->nsproxy->net_ns, file);