Release 4.10 fs/sysfs/dir.c
/*
* fs/sysfs/dir.c - sysfs core and dir operation implementation
*
* Copyright (c) 2001-3 Patrick Mochel
* Copyright (c) 2007 SUSE Linux Products GmbH
* Copyright (c) 2007 Tejun Heo <teheo@suse.de>
*
* This file is released under the GPLv2.
*
* Please see Documentation/filesystems/sysfs.txt for more information.
*/
#undef DEBUG
#include <linux/fs.h>
#include <linux/kobject.h>
#include <linux/slab.h>
#include "sysfs.h"
DEFINE_SPINLOCK(sysfs_symlink_target_lock);
void sysfs_warn_dup(struct kernfs_node *parent, const char *name)
{
char *buf;
buf = kzalloc(PATH_MAX, GFP_KERNEL);
if (buf)
kernfs_path(parent, buf, PATH_MAX);
WARN(1, KERN_WARNING "sysfs: cannot create duplicate filename '%s/%s'\n",
buf, name);
kfree(buf);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
tejun heo | tejun heo | 42 | 72.41% | 5 | 50.00% |
eric w. biederman | eric w. biederman | 9 | 15.52% | 2 | 20.00% |
mikulas patocka | mikulas patocka | 7 | 12.07% | 3 | 30.00% |
| Total | 58 | 100.00% | 10 | 100.00% |
/**
* sysfs_create_dir_ns - create a directory for an object with a namespace tag
* @kobj: object we're creating directory for
* @ns: the namespace tag to use
*/
int sysfs_create_dir_ns(struct kobject *kobj, const void *ns)
{
struct kernfs_node *parent, *kn;
BUG_ON(!kobj);
if (kobj->parent)
parent = kobj->parent->sd;
else
parent = sysfs_root_kn;
if (!parent)
return -ENOENT;
kn = kernfs_create_dir_ns(parent, kobject_name(kobj),
S_IRWXU | S_IRUGO | S_IXUGO, kobj, ns);
if (IS_ERR(kn)) {
if (PTR_ERR(kn) == -EEXIST)
sysfs_warn_dup(parent, kobject_name(kobj));
return PTR_ERR(kn);
}
kobj->sd = kn;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
tejun heo | tejun heo | 88 | 71.54% | 5 | 45.45% |
eric w. biederman | eric w. biederman | 25 | 20.33% | 4 | 36.36% |
mikulas patocka | mikulas patocka | 7 | 5.69% | 1 | 9.09% |
andrew morton | andrew morton | 3 | 2.44% | 1 | 9.09% |
| Total | 123 | 100.00% | 11 | 100.00% |
/**
* sysfs_remove_dir - remove an object's directory.
* @kobj: object.
*
* The only thing special about this is that we remove any files in
* the directory before we remove the directory, and we've inlined
* what used to be sysfs_rmdir() below, instead of calling separately.
*/
void sysfs_remove_dir(struct kobject *kobj)
{
struct kernfs_node *kn = kobj->sd;
/*
* In general, kboject owner is responsible for ensuring removal
* doesn't race with other operations and sysfs doesn't provide any
* protection; however, when @kobj is used as a symlink target, the
* symlinking entity usually doesn't own @kobj and thus has no
* control over removal. @kobj->sd may be removed anytime
* and symlink code may end up dereferencing an already freed node.
*
* sysfs_symlink_target_lock synchronizes @kobj->sd
* disassociation against symlink operations so that symlink code
* can safely dereference @kobj->sd.
*/
spin_lock(&sysfs_symlink_target_lock);
kobj->sd = NULL;
spin_unlock(&sysfs_symlink_target_lock);
if (kn) {
WARN_ON_ONCE(kernfs_type(kn) != KERNFS_DIR);
kernfs_remove(kn);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
tejun heo | tejun heo | 35 | 59.32% | 3 | 50.00% |
eric w. biederman | eric w. biederman | 12 | 20.34% | 1 | 16.67% |
andrew morton | andrew morton | 7 | 11.86% | 1 | 16.67% |
al viro | al viro | 5 | 8.47% | 1 | 16.67% |
| Total | 59 | 100.00% | 6 | 100.00% |
int sysfs_rename_dir_ns(struct kobject *kobj, const char *new_name,
const void *new_ns)
{
struct kernfs_node *parent;
int ret;
parent = kernfs_get_parent(kobj->sd);
ret = kernfs_rename_ns(kobj->sd, parent, new_name, new_ns);
kernfs_put(parent);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
tejun heo | tejun heo | 57 | 95.00% | 3 | 75.00% |
andrew morton | andrew morton | 3 | 5.00% | 1 | 25.00% |
| Total | 60 | 100.00% | 4 | 100.00% |
int sysfs_move_dir_ns(struct kobject *kobj, struct kobject *new_parent_kobj,
const void *new_ns)
{
struct kernfs_node *kn = kobj->sd;
struct kernfs_node *new_parent;
new_parent = new_parent_kobj && new_parent_kobj->sd ?
new_parent_kobj->sd : sysfs_root_kn;
return kernfs_rename_ns(kn, new_parent, kn->name, new_ns);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
tejun heo | tejun heo | 42 | 67.74% | 3 | 75.00% |
ming lei | ming lei | 20 | 32.26% | 1 | 25.00% |
| Total | 62 | 100.00% | 4 | 100.00% |
/**
* sysfs_create_mount_point - create an always empty directory
* @parent_kobj: kobject that will contain this always empty directory
* @name: The name of the always empty directory to add
*/
int sysfs_create_mount_point(struct kobject *parent_kobj, const char *name)
{
struct kernfs_node *kn, *parent = parent_kobj->sd;
kn = kernfs_create_empty_dir(parent, name);
if (IS_ERR(kn)) {
if (PTR_ERR(kn) == -EEXIST)
sysfs_warn_dup(parent, name);
return PTR_ERR(kn);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
eric w. biederman | eric w. biederman | 71 | 100.00% | 1 | 100.00% |
| Total | 71 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(sysfs_create_mount_point);
/**
* sysfs_remove_mount_point - remove an always empty directory.
* @parent_kobj: kobject that will contain this always empty directory
* @name: The name of the always empty directory to remove
*
*/
void sysfs_remove_mount_point(struct kobject *parent_kobj, const char *name)
{
struct kernfs_node *parent = parent_kobj->sd;
kernfs_remove_by_name_ns(parent, name, NULL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
eric w. biederman | eric w. biederman | 33 | 100.00% | 1 | 100.00% |
| Total | 33 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(sysfs_remove_mount_point);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
tejun heo | tejun heo | 268 | 53.49% | 12 | 46.15% |
eric w. biederman | eric w. biederman | 162 | 32.34% | 5 | 19.23% |
ming lei | ming lei | 20 | 3.99% | 1 | 3.85% |
mikulas patocka | mikulas patocka | 14 | 2.79% | 3 | 11.54% |
andrew morton | andrew morton | 13 | 2.59% | 1 | 3.85% |
patrick mochel | patrick mochel | 12 | 2.40% | 1 | 3.85% |
al viro | al viro | 5 | 1.00% | 1 | 3.85% |
roel kluin | roel kluin | 4 | 0.80% | 1 | 3.85% |
robert p. j. day | robert p. j. day | 3 | 0.60% | 1 | 3.85% |
| Total | 501 | 100.00% | 26 | 100.00% |
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