Release 4.10 fs/configfs/mount.c
/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* mount.c - operations for initializing and mounting configfs.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*
* Based on sysfs:
* sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
*
* configfs Copyright (C) 2005 Oracle. All rights reserved.
*/
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/pagemap.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/configfs.h>
#include "configfs_internal.h"
/* Random magic number */
#define CONFIGFS_MAGIC 0x62656570
static struct vfsmount *configfs_mount = NULL;
struct kmem_cache *configfs_dir_cachep;
static int configfs_mnt_count = 0;
static const struct super_operations configfs_ops = {
.statfs = simple_statfs,
.drop_inode = generic_delete_inode,
};
static struct config_group configfs_root_group = {
.cg_item = {
.ci_namebuf = "root",
.ci_name = configfs_root_group.cg_item.ci_namebuf,
},
};
int configfs_is_root(struct config_item *item)
{
return item == &configfs_root_group.cg_item;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| joel becker | joel becker | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
static struct configfs_dirent configfs_root = {
.s_sibling = LIST_HEAD_INIT(configfs_root.s_sibling),
.s_children = LIST_HEAD_INIT(configfs_root.s_children),
.s_element = &configfs_root_group.cg_item,
.s_type = CONFIGFS_ROOT,
.s_iattr = NULL,
};
static int configfs_fill_super(struct super_block *sb, void *data, int silent)
{
struct inode *inode;
struct dentry *root;
sb->s_blocksize = PAGE_SIZE;
sb->s_blocksize_bits = PAGE_SHIFT;
sb->s_magic = CONFIGFS_MAGIC;
sb->s_op = &configfs_ops;
sb->s_time_gran = 1;
inode = configfs_new_inode(S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
&configfs_root, sb);
if (inode) {
inode->i_op = &configfs_root_inode_operations;
inode->i_fop = &configfs_dir_operations;
/* directory inodes start off with i_nlink == 2 (for "." entry) */
inc_nlink(inode);
} else {
pr_debug("could not get root inode\n");
return -ENOMEM;
}
root = d_make_root(inode);
if (!root) {
pr_debug("%s: could not get root dentry!\n",__func__);
return -ENOMEM;
}
config_group_init(&configfs_root_group);
configfs_root_group.cg_item.ci_dentry = root;
root->d_fsdata = &configfs_root;
sb->s_root = root;
sb->s_d_op = &configfs_dentry_ops; /* the rest get that */
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| joel becker | joel becker | 159 | 89.33% | 2 | 20.00% |
| al viro | al viro | 12 | 6.74% | 4 | 40.00% |
| dave hansen | dave hansen | 3 | 1.69% | 1 | 10.00% |
| kirill a. shutemov | kirill a. shutemov | 2 | 1.12% | 1 | 10.00% |
| fabian frederick | fabian frederick | 1 | 0.56% | 1 | 10.00% |
| harvey harrison | harvey harrison | 1 | 0.56% | 1 | 10.00% |
| Total | 178 | 100.00% | 10 | 100.00% |
static struct dentry *configfs_do_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
return mount_single(fs_type, flags, data, configfs_fill_super);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| joel becker | joel becker | 32 | 86.49% | 1 | 50.00% |
| al viro | al viro | 5 | 13.51% | 1 | 50.00% |
| Total | 37 | 100.00% | 2 | 100.00% |
static struct file_system_type configfs_fs_type = {
.owner = THIS_MODULE,
.name = "configfs",
.mount = configfs_do_mount,
.kill_sb = kill_litter_super,
};
MODULE_ALIAS_FS("configfs");
struct dentry *configfs_pin_fs(void)
{
int err = simple_pin_fs(&configfs_fs_type, &configfs_mount,
&configfs_mnt_count);
return err ? ERR_PTR(err) : configfs_mount->mnt_root;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| al viro | al viro | 18 | 50.00% | 1 | 33.33% |
| joel becker | joel becker | 16 | 44.44% | 1 | 33.33% |
| trond myklebust | trond myklebust | 2 | 5.56% | 1 | 33.33% |
| Total | 36 | 100.00% | 3 | 100.00% |
void configfs_release_fs(void)
{
simple_release_fs(&configfs_mount, &configfs_mnt_count);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| joel becker | joel becker | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static int __init configfs_init(void)
{
int err = -ENOMEM;
configfs_dir_cachep = kmem_cache_create("configfs_dir_cache",
sizeof(struct configfs_dirent),
0, 0, NULL);
if (!configfs_dir_cachep)
goto out;
err = sysfs_create_mount_point(kernel_kobj, "config");
if (err)
goto out2;
err = register_filesystem(&configfs_fs_type);
if (err)
goto out3;
return 0;
out3:
pr_err("Unable to register filesystem!\n");
sysfs_remove_mount_point(kernel_kobj, "config");
out2:
kmem_cache_destroy(configfs_dir_cachep);
configfs_dir_cachep = NULL;
out:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| joel becker | joel becker | 67 | 63.21% | 2 | 20.00% |
| peter zijlstra | peter zijlstra | 12 | 11.32% | 1 | 10.00% |
| al viro | al viro | 12 | 11.32% | 1 | 10.00% |
| eric w. biederman | eric w. biederman | 9 | 8.49% | 1 | 10.00% |
| fabian frederick | fabian frederick | 2 | 1.89% | 2 | 20.00% |
| christoph hellwig | christoph hellwig | 2 | 1.89% | 1 | 10.00% |
| greg kroah-hartman | greg kroah-hartman | 2 | 1.89% | 2 | 20.00% |
| Total | 106 | 100.00% | 10 | 100.00% |
static void __exit configfs_exit(void)
{
unregister_filesystem(&configfs_fs_type);
sysfs_remove_mount_point(kernel_kobj, "config");
kmem_cache_destroy(configfs_dir_cachep);
configfs_dir_cachep = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| joel becker | joel becker | 27 | 87.10% | 2 | 66.67% |
| eric w. biederman | eric w. biederman | 4 | 12.90% | 1 | 33.33% |
| Total | 31 | 100.00% | 3 | 100.00% |
MODULE_AUTHOR("Oracle");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.0.2");
MODULE_DESCRIPTION("Simple RAM filesystem for user driven kernel subsystem configuration.");
core_initcall(configfs_init);
module_exit(configfs_exit);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| joel becker | joel becker | 520 | 83.60% | 2 | 8.00% |
| al viro | al viro | 50 | 8.04% | 7 | 28.00% |
| eric w. biederman | eric w. biederman | 18 | 2.89% | 2 | 8.00% |
| peter zijlstra | peter zijlstra | 12 | 1.93% | 1 | 4.00% |
| dave hansen | dave hansen | 3 | 0.48% | 1 | 4.00% |
| fabian frederick | fabian frederick | 3 | 0.48% | 2 | 8.00% |
| tejun heo | tejun heo | 3 | 0.48% | 1 | 4.00% |
| kirill a. shutemov | kirill a. shutemov | 2 | 0.32% | 1 | 4.00% |
| christoph lameter | christoph lameter | 2 | 0.32% | 1 | 4.00% |
| christoph hellwig | christoph hellwig | 2 | 0.32% | 1 | 4.00% |
| greg kroah-hartman | greg kroah-hartman | 2 | 0.32% | 2 | 8.00% |
| trond myklebust | trond myklebust | 2 | 0.32% | 1 | 4.00% |
| harvey harrison | harvey harrison | 1 | 0.16% | 1 | 4.00% |
| daniel baluta | daniel baluta | 1 | 0.16% | 1 | 4.00% |
| josef 'jeff' sipek | josef 'jeff' sipek | 1 | 0.16% | 1 | 4.00% |
| Total | 622 | 100.00% | 25 | 100.00% |
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