dprintk("<-- nfs_clone_server() = error %d\n", error);
return ERR_PTR(error);
}
+
+#ifdef CONFIG_PROC_FS
+static struct proc_dir_entry *proc_fs_nfs;
+
+static int nfs_server_list_open(struct inode *inode, struct file *file);
+static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
+static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
+static void nfs_server_list_stop(struct seq_file *p, void *v);
+static int nfs_server_list_show(struct seq_file *m, void *v);
+
+static struct seq_operations nfs_server_list_ops = {
+ .start = nfs_server_list_start,
+ .next = nfs_server_list_next,
+ .stop = nfs_server_list_stop,
+ .show = nfs_server_list_show,
+};
+
+static struct file_operations nfs_server_list_fops = {
+ .open = nfs_server_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int nfs_volume_list_open(struct inode *inode, struct file *file);
+static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
+static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
+static void nfs_volume_list_stop(struct seq_file *p, void *v);
+static int nfs_volume_list_show(struct seq_file *m, void *v);
+
+static struct seq_operations nfs_volume_list_ops = {
+ .start = nfs_volume_list_start,
+ .next = nfs_volume_list_next,
+ .stop = nfs_volume_list_stop,
+ .show = nfs_volume_list_show,
+};
+
+static struct file_operations nfs_volume_list_fops = {
+ .open = nfs_volume_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which
+ * we're dealing
+ */
+static int nfs_server_list_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *m;
+ int ret;
+
+ ret = seq_open(file, &nfs_server_list_ops);
+ if (ret < 0)
+ return ret;
+
+ m = file->private_data;
+ m->private = PDE(inode)->data;
+
+ return 0;
+}
+
+/*
+ * set up the iterator to start reading from the server list and return the first item
+ */
+static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
+{
+ struct list_head *_p;
+ loff_t pos = *_pos;
+
+ /* lock the list against modification */
+ spin_lock(&nfs_client_lock);
+
+ /* allow for the header line */
+ if (!pos)
+ return SEQ_START_TOKEN;
+ pos--;
+
+ /* find the n'th element in the list */
+ list_for_each(_p, &nfs_client_list)
+ if (!pos--)
+ break;
+
+ return _p != &nfs_client_list ? _p : NULL;
+}
+
+/*
+ * move to next server
+ */
+static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ struct list_head *_p;
+
+ (*pos)++;
+
+ _p = v;
+ _p = (v == SEQ_START_TOKEN) ? nfs_client_list.next : _p->next;
+
+ return _p != &nfs_client_list ? _p : NULL;
+}
+
+/*
+ * clean up after reading from the transports list
+ */
+static void nfs_server_list_stop(struct seq_file *p, void *v)
+{
+ spin_unlock(&nfs_client_lock);
+}
+
+/*
+ * display a header line followed by a load of call lines
+ */
+static int nfs_server_list_show(struct seq_file *m, void *v)
+{
+ struct nfs_client *clp;
+
+ /* display header on line 1 */
+ if (v == SEQ_START_TOKEN) {
+ seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
+ return 0;
+ }
+
+ /* display one transport per line on subsequent lines */
+ clp = list_entry(v, struct nfs_client, cl_share_link);
+
+ seq_printf(m, "v%d %02x%02x%02x%02x %4hx %3d %s\n",
+ clp->cl_nfsversion,
+ NIPQUAD(clp->cl_addr.sin_addr),
+ ntohs(clp->cl_addr.sin_port),
+ atomic_read(&clp->cl_count),
+ clp->cl_hostname);
+
+ return 0;
+}
+
+/*
+ * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
+ */
+static int nfs_volume_list_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *m;
+ int ret;
+
+ ret = seq_open(file, &nfs_volume_list_ops);
+ if (ret < 0)
+ return ret;
+
+ m = file->private_data;
+ m->private = PDE(inode)->data;
+
+ return 0;
+}
+
+/*
+ * set up the iterator to start reading from the volume list and return the first item
+ */
+static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
+{
+ struct list_head *_p;
+ loff_t pos = *_pos;
+
+ /* lock the list against modification */
+ spin_lock(&nfs_client_lock);
+
+ /* allow for the header line */
+ if (!pos)
+ return SEQ_START_TOKEN;
+ pos--;
+
+ /* find the n'th element in the list */
+ list_for_each(_p, &nfs_volume_list)
+ if (!pos--)
+ break;
+
+ return _p != &nfs_volume_list ? _p : NULL;
+}
+
+/*
+ * move to next volume
+ */
+static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ struct list_head *_p;
+
+ (*pos)++;
+
+ _p = v;
+ _p = (v == SEQ_START_TOKEN) ? nfs_volume_list.next : _p->next;
+
+ return _p != &nfs_volume_list ? _p : NULL;
+}
+
+/*
+ * clean up after reading from the transports list
+ */
+static void nfs_volume_list_stop(struct seq_file *p, void *v)
+{
+ spin_unlock(&nfs_client_lock);
+}
+
+/*
+ * display a header line followed by a load of call lines
+ */
+static int nfs_volume_list_show(struct seq_file *m, void *v)
+{
+ struct nfs_server *server;
+ struct nfs_client *clp;
+ char dev[8], fsid[17];
+
+ /* display header on line 1 */
+ if (v == SEQ_START_TOKEN) {
+ seq_puts(m, "NV SERVER PORT DEV FSID\n");
+ return 0;
+ }
+ /* display one transport per line on subsequent lines */
+ server = list_entry(v, struct nfs_server, master_link);
+ clp = server->nfs_client;
+
+ snprintf(dev, 8, "%u:%u",
+ MAJOR(server->s_dev), MINOR(server->s_dev));
+
+ snprintf(fsid, 17, "%llx:%llx",
+ server->fsid.major, server->fsid.minor);
+
+ seq_printf(m, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n",
+ clp->cl_nfsversion,
+ NIPQUAD(clp->cl_addr.sin_addr),
+ ntohs(clp->cl_addr.sin_port),
+ dev,
+ fsid);
+
+ return 0;
+}
+
+/*
+ * initialise the /proc/fs/nfsfs/ directory
+ */
+int __init nfs_fs_proc_init(void)
+{
+ struct proc_dir_entry *p;
+
+ proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs);
+ if (!proc_fs_nfs)
+ goto error_0;
+
+ proc_fs_nfs->owner = THIS_MODULE;
+
+ /* a file of servers with which we're dealing */
+ p = create_proc_entry("servers", S_IFREG|S_IRUGO, proc_fs_nfs);
+ if (!p)
+ goto error_1;
+
+ p->proc_fops = &nfs_server_list_fops;
+ p->owner = THIS_MODULE;
+
+ /* a file of volumes that we have mounted */
+ p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs);
+ if (!p)
+ goto error_2;
+
+ p->proc_fops = &nfs_volume_list_fops;
+ p->owner = THIS_MODULE;
+ return 0;
+
+error_2:
+ remove_proc_entry("servers", proc_fs_nfs);
+error_1:
+ remove_proc_entry("nfsfs", proc_root_fs);
+error_0:
+ return -ENOMEM;
+}
+
+/*
+ * clean up the /proc/fs/nfsfs/ directory
+ */
+void nfs_fs_proc_exit(void)
+{
+ remove_proc_entry("volumes", proc_fs_nfs);
+ remove_proc_entry("servers", proc_fs_nfs);
+ remove_proc_entry("nfsfs", proc_root_fs);
+}
+
+#endif /* CONFIG_PROC_FS */
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff