1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
858 lines
21 KiB
C
858 lines
21 KiB
C
/* proc.c: /proc interface for AFS
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*
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* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include "cell.h"
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#include "volume.h"
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#include <asm/uaccess.h>
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#include "internal.h"
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static struct proc_dir_entry *proc_afs;
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static int afs_proc_cells_open(struct inode *inode, struct file *file);
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static void *afs_proc_cells_start(struct seq_file *p, loff_t *pos);
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static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos);
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static void afs_proc_cells_stop(struct seq_file *p, void *v);
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static int afs_proc_cells_show(struct seq_file *m, void *v);
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static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
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size_t size, loff_t *_pos);
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static struct seq_operations afs_proc_cells_ops = {
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.start = afs_proc_cells_start,
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.next = afs_proc_cells_next,
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.stop = afs_proc_cells_stop,
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.show = afs_proc_cells_show,
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};
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static struct file_operations afs_proc_cells_fops = {
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.open = afs_proc_cells_open,
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.read = seq_read,
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.write = afs_proc_cells_write,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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static int afs_proc_rootcell_open(struct inode *inode, struct file *file);
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static int afs_proc_rootcell_release(struct inode *inode, struct file *file);
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static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf,
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size_t size, loff_t *_pos);
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static ssize_t afs_proc_rootcell_write(struct file *file,
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const char __user *buf,
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size_t size, loff_t *_pos);
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static struct file_operations afs_proc_rootcell_fops = {
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.open = afs_proc_rootcell_open,
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.read = afs_proc_rootcell_read,
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.write = afs_proc_rootcell_write,
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.llseek = no_llseek,
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.release = afs_proc_rootcell_release
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};
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static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file);
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static int afs_proc_cell_volumes_release(struct inode *inode,
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struct file *file);
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static void *afs_proc_cell_volumes_start(struct seq_file *p, loff_t *pos);
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static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
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loff_t *pos);
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static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v);
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static int afs_proc_cell_volumes_show(struct seq_file *m, void *v);
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static struct seq_operations afs_proc_cell_volumes_ops = {
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.start = afs_proc_cell_volumes_start,
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.next = afs_proc_cell_volumes_next,
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.stop = afs_proc_cell_volumes_stop,
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.show = afs_proc_cell_volumes_show,
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};
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static struct file_operations afs_proc_cell_volumes_fops = {
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.open = afs_proc_cell_volumes_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = afs_proc_cell_volumes_release,
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};
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static int afs_proc_cell_vlservers_open(struct inode *inode,
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struct file *file);
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static int afs_proc_cell_vlservers_release(struct inode *inode,
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struct file *file);
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static void *afs_proc_cell_vlservers_start(struct seq_file *p, loff_t *pos);
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static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
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loff_t *pos);
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static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v);
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static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v);
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static struct seq_operations afs_proc_cell_vlservers_ops = {
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.start = afs_proc_cell_vlservers_start,
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.next = afs_proc_cell_vlservers_next,
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.stop = afs_proc_cell_vlservers_stop,
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.show = afs_proc_cell_vlservers_show,
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};
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static struct file_operations afs_proc_cell_vlservers_fops = {
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.open = afs_proc_cell_vlservers_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = afs_proc_cell_vlservers_release,
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};
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static int afs_proc_cell_servers_open(struct inode *inode, struct file *file);
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static int afs_proc_cell_servers_release(struct inode *inode,
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struct file *file);
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static void *afs_proc_cell_servers_start(struct seq_file *p, loff_t *pos);
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static void *afs_proc_cell_servers_next(struct seq_file *p, void *v,
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loff_t *pos);
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static void afs_proc_cell_servers_stop(struct seq_file *p, void *v);
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static int afs_proc_cell_servers_show(struct seq_file *m, void *v);
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static struct seq_operations afs_proc_cell_servers_ops = {
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.start = afs_proc_cell_servers_start,
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.next = afs_proc_cell_servers_next,
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.stop = afs_proc_cell_servers_stop,
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.show = afs_proc_cell_servers_show,
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};
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static struct file_operations afs_proc_cell_servers_fops = {
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.open = afs_proc_cell_servers_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = afs_proc_cell_servers_release,
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};
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/*****************************************************************************/
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/*
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* initialise the /proc/fs/afs/ directory
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*/
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int afs_proc_init(void)
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{
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struct proc_dir_entry *p;
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_enter("");
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proc_afs = proc_mkdir("fs/afs", NULL);
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if (!proc_afs)
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goto error;
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proc_afs->owner = THIS_MODULE;
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p = create_proc_entry("cells", 0, proc_afs);
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if (!p)
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goto error_proc;
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p->proc_fops = &afs_proc_cells_fops;
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p->owner = THIS_MODULE;
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p = create_proc_entry("rootcell", 0, proc_afs);
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if (!p)
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goto error_cells;
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p->proc_fops = &afs_proc_rootcell_fops;
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p->owner = THIS_MODULE;
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_leave(" = 0");
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return 0;
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error_cells:
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remove_proc_entry("cells", proc_afs);
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error_proc:
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remove_proc_entry("fs/afs", NULL);
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error:
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_leave(" = -ENOMEM");
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return -ENOMEM;
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} /* end afs_proc_init() */
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/*****************************************************************************/
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/*
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* clean up the /proc/fs/afs/ directory
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*/
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void afs_proc_cleanup(void)
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{
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remove_proc_entry("cells", proc_afs);
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remove_proc_entry("fs/afs", NULL);
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} /* end afs_proc_cleanup() */
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/*****************************************************************************/
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/*
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* open "/proc/fs/afs/cells" which provides a summary of extant cells
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*/
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static int afs_proc_cells_open(struct inode *inode, struct file *file)
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{
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struct seq_file *m;
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int ret;
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ret = seq_open(file, &afs_proc_cells_ops);
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if (ret < 0)
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return ret;
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m = file->private_data;
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m->private = PDE(inode)->data;
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return 0;
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} /* end afs_proc_cells_open() */
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/*****************************************************************************/
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/*
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* set up the iterator to start reading from the cells list and return the
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* first item
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*/
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static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos)
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{
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struct list_head *_p;
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loff_t pos = *_pos;
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/* lock the list against modification */
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down_read(&afs_proc_cells_sem);
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/* allow for the header line */
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if (!pos)
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return (void *) 1;
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pos--;
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/* find the n'th element in the list */
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list_for_each(_p, &afs_proc_cells)
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if (!pos--)
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break;
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return _p != &afs_proc_cells ? _p : NULL;
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} /* end afs_proc_cells_start() */
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/*****************************************************************************/
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/*
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* move to next cell in cells list
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*/
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static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos)
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{
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struct list_head *_p;
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(*pos)++;
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_p = v;
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_p = v == (void *) 1 ? afs_proc_cells.next : _p->next;
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return _p != &afs_proc_cells ? _p : NULL;
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} /* end afs_proc_cells_next() */
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/*****************************************************************************/
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/*
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* clean up after reading from the cells list
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*/
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static void afs_proc_cells_stop(struct seq_file *p, void *v)
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{
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up_read(&afs_proc_cells_sem);
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} /* end afs_proc_cells_stop() */
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/*****************************************************************************/
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/*
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* display a header line followed by a load of cell lines
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*/
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static int afs_proc_cells_show(struct seq_file *m, void *v)
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{
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struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link);
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/* display header on line 1 */
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if (v == (void *) 1) {
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seq_puts(m, "USE NAME\n");
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return 0;
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}
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/* display one cell per line on subsequent lines */
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seq_printf(m, "%3d %s\n", atomic_read(&cell->usage), cell->name);
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return 0;
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} /* end afs_proc_cells_show() */
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/*****************************************************************************/
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/*
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* handle writes to /proc/fs/afs/cells
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* - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]"
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*/
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static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
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size_t size, loff_t *_pos)
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{
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char *kbuf, *name, *args;
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int ret;
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/* start by dragging the command into memory */
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if (size <= 1 || size >= PAGE_SIZE)
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return -EINVAL;
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kbuf = kmalloc(size + 1, GFP_KERNEL);
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if (!kbuf)
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return -ENOMEM;
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ret = -EFAULT;
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if (copy_from_user(kbuf, buf, size) != 0)
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goto done;
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kbuf[size] = 0;
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/* trim to first NL */
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name = memchr(kbuf, '\n', size);
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if (name)
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*name = 0;
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/* split into command, name and argslist */
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name = strchr(kbuf, ' ');
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if (!name)
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goto inval;
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do {
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*name++ = 0;
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} while(*name == ' ');
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if (!*name)
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goto inval;
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args = strchr(name, ' ');
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if (!args)
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goto inval;
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do {
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*args++ = 0;
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} while(*args == ' ');
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if (!*args)
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goto inval;
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/* determine command to perform */
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_debug("cmd=%s name=%s args=%s", kbuf, name, args);
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if (strcmp(kbuf, "add") == 0) {
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struct afs_cell *cell;
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ret = afs_cell_create(name, args, &cell);
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if (ret < 0)
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goto done;
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printk("kAFS: Added new cell '%s'\n", name);
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}
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else {
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goto inval;
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}
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ret = size;
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done:
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kfree(kbuf);
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_leave(" = %d", ret);
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return ret;
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inval:
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ret = -EINVAL;
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printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n");
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goto done;
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} /* end afs_proc_cells_write() */
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/*****************************************************************************/
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/*
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* Stubs for /proc/fs/afs/rootcell
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*/
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static int afs_proc_rootcell_open(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static int afs_proc_rootcell_release(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf,
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size_t size, loff_t *_pos)
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{
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return 0;
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}
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/*****************************************************************************/
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/*
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* handle writes to /proc/fs/afs/rootcell
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* - to initialize rootcell: echo "cell.name:192.168.231.14"
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*/
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static ssize_t afs_proc_rootcell_write(struct file *file,
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const char __user *buf,
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size_t size, loff_t *_pos)
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{
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char *kbuf, *s;
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int ret;
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/* start by dragging the command into memory */
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if (size <= 1 || size >= PAGE_SIZE)
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return -EINVAL;
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ret = -ENOMEM;
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kbuf = kmalloc(size + 1, GFP_KERNEL);
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if (!kbuf)
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goto nomem;
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ret = -EFAULT;
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if (copy_from_user(kbuf, buf, size) != 0)
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goto infault;
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kbuf[size] = 0;
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/* trim to first NL */
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s = memchr(kbuf, '\n', size);
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if (s)
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*s = 0;
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/* determine command to perform */
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_debug("rootcell=%s", kbuf);
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ret = afs_cell_init(kbuf);
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if (ret >= 0)
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ret = size; /* consume everything, always */
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infault:
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kfree(kbuf);
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nomem:
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_leave(" = %d", ret);
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return ret;
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} /* end afs_proc_rootcell_write() */
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/*****************************************************************************/
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/*
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* initialise /proc/fs/afs/<cell>/
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*/
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int afs_proc_cell_setup(struct afs_cell *cell)
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{
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struct proc_dir_entry *p;
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_enter("%p{%s}", cell, cell->name);
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cell->proc_dir = proc_mkdir(cell->name, proc_afs);
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if (!cell->proc_dir)
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return -ENOMEM;
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p = create_proc_entry("servers", 0, cell->proc_dir);
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if (!p)
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goto error_proc;
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p->proc_fops = &afs_proc_cell_servers_fops;
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p->owner = THIS_MODULE;
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p->data = cell;
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p = create_proc_entry("vlservers", 0, cell->proc_dir);
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if (!p)
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goto error_servers;
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p->proc_fops = &afs_proc_cell_vlservers_fops;
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p->owner = THIS_MODULE;
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p->data = cell;
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p = create_proc_entry("volumes", 0, cell->proc_dir);
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if (!p)
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goto error_vlservers;
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p->proc_fops = &afs_proc_cell_volumes_fops;
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p->owner = THIS_MODULE;
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p->data = cell;
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_leave(" = 0");
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return 0;
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error_vlservers:
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remove_proc_entry("vlservers", cell->proc_dir);
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error_servers:
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remove_proc_entry("servers", cell->proc_dir);
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error_proc:
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remove_proc_entry(cell->name, proc_afs);
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_leave(" = -ENOMEM");
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return -ENOMEM;
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} /* end afs_proc_cell_setup() */
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/*****************************************************************************/
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/*
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* remove /proc/fs/afs/<cell>/
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*/
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void afs_proc_cell_remove(struct afs_cell *cell)
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{
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_enter("");
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remove_proc_entry("volumes", cell->proc_dir);
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remove_proc_entry("vlservers", cell->proc_dir);
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remove_proc_entry("servers", cell->proc_dir);
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remove_proc_entry(cell->name, proc_afs);
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_leave("");
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} /* end afs_proc_cell_remove() */
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/*****************************************************************************/
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/*
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* open "/proc/fs/afs/<cell>/volumes" which provides a summary of extant cells
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*/
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static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file)
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{
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struct afs_cell *cell;
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struct seq_file *m;
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int ret;
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cell = afs_get_cell_maybe((struct afs_cell **) &PDE(inode)->data);
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if (!cell)
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return -ENOENT;
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ret = seq_open(file, &afs_proc_cell_volumes_ops);
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if (ret < 0)
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return ret;
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m = file->private_data;
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m->private = cell;
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return 0;
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} /* end afs_proc_cell_volumes_open() */
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/*****************************************************************************/
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/*
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* close the file and release the ref to the cell
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*/
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static int afs_proc_cell_volumes_release(struct inode *inode, struct file *file)
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{
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struct afs_cell *cell = PDE(inode)->data;
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|
int ret;
|
|
|
|
ret = seq_release(inode,file);
|
|
|
|
afs_put_cell(cell);
|
|
|
|
return ret;
|
|
} /* end afs_proc_cell_volumes_release() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* set up the iterator to start reading from the cells list and return the
|
|
* first item
|
|
*/
|
|
static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos)
|
|
{
|
|
struct list_head *_p;
|
|
struct afs_cell *cell = m->private;
|
|
loff_t pos = *_pos;
|
|
|
|
_enter("cell=%p pos=%Ld", cell, *_pos);
|
|
|
|
/* lock the list against modification */
|
|
down_read(&cell->vl_sem);
|
|
|
|
/* allow for the header line */
|
|
if (!pos)
|
|
return (void *) 1;
|
|
pos--;
|
|
|
|
/* find the n'th element in the list */
|
|
list_for_each(_p, &cell->vl_list)
|
|
if (!pos--)
|
|
break;
|
|
|
|
return _p != &cell->vl_list ? _p : NULL;
|
|
} /* end afs_proc_cell_volumes_start() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* move to next cell in cells list
|
|
*/
|
|
static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
|
|
loff_t *_pos)
|
|
{
|
|
struct list_head *_p;
|
|
struct afs_cell *cell = p->private;
|
|
|
|
_enter("cell=%p pos=%Ld", cell, *_pos);
|
|
|
|
(*_pos)++;
|
|
|
|
_p = v;
|
|
_p = v == (void *) 1 ? cell->vl_list.next : _p->next;
|
|
|
|
return _p != &cell->vl_list ? _p : NULL;
|
|
} /* end afs_proc_cell_volumes_next() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* clean up after reading from the cells list
|
|
*/
|
|
static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v)
|
|
{
|
|
struct afs_cell *cell = p->private;
|
|
|
|
up_read(&cell->vl_sem);
|
|
|
|
} /* end afs_proc_cell_volumes_stop() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* display a header line followed by a load of volume lines
|
|
*/
|
|
static int afs_proc_cell_volumes_show(struct seq_file *m, void *v)
|
|
{
|
|
struct afs_vlocation *vlocation =
|
|
list_entry(v, struct afs_vlocation, link);
|
|
|
|
/* display header on line 1 */
|
|
if (v == (void *) 1) {
|
|
seq_puts(m, "USE VLID[0] VLID[1] VLID[2] NAME\n");
|
|
return 0;
|
|
}
|
|
|
|
/* display one cell per line on subsequent lines */
|
|
seq_printf(m, "%3d %08x %08x %08x %s\n",
|
|
atomic_read(&vlocation->usage),
|
|
vlocation->vldb.vid[0],
|
|
vlocation->vldb.vid[1],
|
|
vlocation->vldb.vid[2],
|
|
vlocation->vldb.name
|
|
);
|
|
|
|
return 0;
|
|
} /* end afs_proc_cell_volumes_show() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* open "/proc/fs/afs/<cell>/vlservers" which provides a list of volume
|
|
* location server
|
|
*/
|
|
static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct afs_cell *cell;
|
|
struct seq_file *m;
|
|
int ret;
|
|
|
|
cell = afs_get_cell_maybe((struct afs_cell**)&PDE(inode)->data);
|
|
if (!cell)
|
|
return -ENOENT;
|
|
|
|
ret = seq_open(file,&afs_proc_cell_vlservers_ops);
|
|
if (ret<0)
|
|
return ret;
|
|
|
|
m = file->private_data;
|
|
m->private = cell;
|
|
|
|
return 0;
|
|
} /* end afs_proc_cell_vlservers_open() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* close the file and release the ref to the cell
|
|
*/
|
|
static int afs_proc_cell_vlservers_release(struct inode *inode,
|
|
struct file *file)
|
|
{
|
|
struct afs_cell *cell = PDE(inode)->data;
|
|
int ret;
|
|
|
|
ret = seq_release(inode,file);
|
|
|
|
afs_put_cell(cell);
|
|
|
|
return ret;
|
|
} /* end afs_proc_cell_vlservers_release() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* set up the iterator to start reading from the cells list and return the
|
|
* first item
|
|
*/
|
|
static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos)
|
|
{
|
|
struct afs_cell *cell = m->private;
|
|
loff_t pos = *_pos;
|
|
|
|
_enter("cell=%p pos=%Ld", cell, *_pos);
|
|
|
|
/* lock the list against modification */
|
|
down_read(&cell->vl_sem);
|
|
|
|
/* allow for the header line */
|
|
if (!pos)
|
|
return (void *) 1;
|
|
pos--;
|
|
|
|
if (pos >= cell->vl_naddrs)
|
|
return NULL;
|
|
|
|
return &cell->vl_addrs[pos];
|
|
} /* end afs_proc_cell_vlservers_start() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* move to next cell in cells list
|
|
*/
|
|
static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
|
|
loff_t *_pos)
|
|
{
|
|
struct afs_cell *cell = p->private;
|
|
loff_t pos;
|
|
|
|
_enter("cell=%p{nad=%u} pos=%Ld", cell, cell->vl_naddrs, *_pos);
|
|
|
|
pos = *_pos;
|
|
(*_pos)++;
|
|
if (pos >= cell->vl_naddrs)
|
|
return NULL;
|
|
|
|
return &cell->vl_addrs[pos];
|
|
} /* end afs_proc_cell_vlservers_next() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* clean up after reading from the cells list
|
|
*/
|
|
static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v)
|
|
{
|
|
struct afs_cell *cell = p->private;
|
|
|
|
up_read(&cell->vl_sem);
|
|
|
|
} /* end afs_proc_cell_vlservers_stop() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* display a header line followed by a load of volume lines
|
|
*/
|
|
static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
|
|
{
|
|
struct in_addr *addr = v;
|
|
|
|
/* display header on line 1 */
|
|
if (v == (struct in_addr *) 1) {
|
|
seq_puts(m, "ADDRESS\n");
|
|
return 0;
|
|
}
|
|
|
|
/* display one cell per line on subsequent lines */
|
|
seq_printf(m, "%u.%u.%u.%u\n", NIPQUAD(addr->s_addr));
|
|
|
|
return 0;
|
|
} /* end afs_proc_cell_vlservers_show() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* open "/proc/fs/afs/<cell>/servers" which provides a summary of active
|
|
* servers
|
|
*/
|
|
static int afs_proc_cell_servers_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct afs_cell *cell;
|
|
struct seq_file *m;
|
|
int ret;
|
|
|
|
cell = afs_get_cell_maybe((struct afs_cell **) &PDE(inode)->data);
|
|
if (!cell)
|
|
return -ENOENT;
|
|
|
|
ret = seq_open(file, &afs_proc_cell_servers_ops);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
m = file->private_data;
|
|
m->private = cell;
|
|
|
|
return 0;
|
|
} /* end afs_proc_cell_servers_open() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* close the file and release the ref to the cell
|
|
*/
|
|
static int afs_proc_cell_servers_release(struct inode *inode,
|
|
struct file *file)
|
|
{
|
|
struct afs_cell *cell = PDE(inode)->data;
|
|
int ret;
|
|
|
|
ret = seq_release(inode, file);
|
|
|
|
afs_put_cell(cell);
|
|
|
|
return ret;
|
|
} /* end afs_proc_cell_servers_release() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* set up the iterator to start reading from the cells list and return the
|
|
* first item
|
|
*/
|
|
static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos)
|
|
{
|
|
struct list_head *_p;
|
|
struct afs_cell *cell = m->private;
|
|
loff_t pos = *_pos;
|
|
|
|
_enter("cell=%p pos=%Ld", cell, *_pos);
|
|
|
|
/* lock the list against modification */
|
|
read_lock(&cell->sv_lock);
|
|
|
|
/* allow for the header line */
|
|
if (!pos)
|
|
return (void *) 1;
|
|
pos--;
|
|
|
|
/* find the n'th element in the list */
|
|
list_for_each(_p, &cell->sv_list)
|
|
if (!pos--)
|
|
break;
|
|
|
|
return _p != &cell->sv_list ? _p : NULL;
|
|
} /* end afs_proc_cell_servers_start() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* move to next cell in cells list
|
|
*/
|
|
static void *afs_proc_cell_servers_next(struct seq_file *p, void *v,
|
|
loff_t *_pos)
|
|
{
|
|
struct list_head *_p;
|
|
struct afs_cell *cell = p->private;
|
|
|
|
_enter("cell=%p pos=%Ld", cell, *_pos);
|
|
|
|
(*_pos)++;
|
|
|
|
_p = v;
|
|
_p = v == (void *) 1 ? cell->sv_list.next : _p->next;
|
|
|
|
return _p != &cell->sv_list ? _p : NULL;
|
|
} /* end afs_proc_cell_servers_next() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* clean up after reading from the cells list
|
|
*/
|
|
static void afs_proc_cell_servers_stop(struct seq_file *p, void *v)
|
|
{
|
|
struct afs_cell *cell = p->private;
|
|
|
|
read_unlock(&cell->sv_lock);
|
|
|
|
} /* end afs_proc_cell_servers_stop() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* display a header line followed by a load of volume lines
|
|
*/
|
|
static int afs_proc_cell_servers_show(struct seq_file *m, void *v)
|
|
{
|
|
struct afs_server *server = list_entry(v, struct afs_server, link);
|
|
char ipaddr[20];
|
|
|
|
/* display header on line 1 */
|
|
if (v == (void *) 1) {
|
|
seq_puts(m, "USE ADDR STATE\n");
|
|
return 0;
|
|
}
|
|
|
|
/* display one cell per line on subsequent lines */
|
|
sprintf(ipaddr, "%u.%u.%u.%u", NIPQUAD(server->addr));
|
|
seq_printf(m, "%3d %-15.15s %5d\n",
|
|
atomic_read(&server->usage),
|
|
ipaddr,
|
|
server->fs_state
|
|
);
|
|
|
|
return 0;
|
|
} /* end afs_proc_cell_servers_show() */
|