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-rw-r--r--fs/sysfs/bin.c13
-rw-r--r--fs/sysfs/dir.c61
-rw-r--r--fs/sysfs/file.c82
-rw-r--r--fs/sysfs/group.c92
-rw-r--r--fs/sysfs/inode.c21
-rw-r--r--fs/sysfs/mount.c13
-rw-r--r--fs/sysfs/symlink.c18
-rw-r--r--fs/sysfs/sysfs.h18
8 files changed, 189 insertions, 129 deletions
diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
index 15c68f9489a..c590cabd57b 100644
--- a/fs/sysfs/bin.c
+++ b/fs/sysfs/bin.c
@@ -22,8 +22,7 @@
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/mm.h>
-
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include "sysfs.h"
@@ -391,7 +390,7 @@ out_unlock:
return rc;
}
-static int open(struct inode * inode, struct file * file)
+static int open(struct inode *inode, struct file *file)
{
struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
@@ -435,7 +434,7 @@ static int open(struct inode * inode, struct file * file)
return error;
}
-static int release(struct inode * inode, struct file * file)
+static int release(struct inode *inode, struct file *file)
{
struct bin_buffer *bb = file->private_data;
@@ -481,7 +480,6 @@ void unmap_bin_file(struct sysfs_dirent *attr_sd)
* @kobj: object.
* @attr: attribute descriptor.
*/
-
int sysfs_create_bin_file(struct kobject *kobj,
const struct bin_attribute *attr)
{
@@ -489,19 +487,16 @@ int sysfs_create_bin_file(struct kobject *kobj,
return sysfs_add_file(kobj->sd, &attr->attr, SYSFS_KOBJ_BIN_ATTR);
}
-
+EXPORT_SYMBOL_GPL(sysfs_create_bin_file);
/**
* sysfs_remove_bin_file - remove binary file for object.
* @kobj: object.
* @attr: attribute descriptor.
*/
-
void sysfs_remove_bin_file(struct kobject *kobj,
const struct bin_attribute *attr)
{
sysfs_hash_and_remove(kobj->sd, NULL, attr->attr.name);
}
-
-EXPORT_SYMBOL_GPL(sysfs_create_bin_file);
EXPORT_SYMBOL_GPL(sysfs_remove_bin_file);
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index e068e744dbd..4d83cedb9fc 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -46,7 +46,7 @@ static unsigned int sysfs_name_hash(const void *ns, const char *name)
unsigned int len = strlen(name);
while (len--)
hash = partial_name_hash(*name++, hash);
- hash = ( end_name_hash(hash) ^ hash_ptr( (void *)ns, 31 ) );
+ hash = (end_name_hash(hash) ^ hash_ptr((void *)ns, 31));
hash &= 0x7fffffffU;
/* Reserve hash numbers 0, 1 and INT_MAX for magic directory entries */
if (hash < 1)
@@ -258,7 +258,7 @@ static void sysfs_free_ino(unsigned int ino)
spin_unlock(&sysfs_ino_lock);
}
-void release_sysfs_dirent(struct sysfs_dirent * sd)
+void release_sysfs_dirent(struct sysfs_dirent *sd)
{
struct sysfs_dirent *parent_sd;
@@ -297,7 +297,6 @@ static int sysfs_dentry_delete(const struct dentry *dentry)
static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
{
struct sysfs_dirent *sd;
- int is_dir;
int type;
if (flags & LOOKUP_RCU)
@@ -341,18 +340,15 @@ out_bad:
* is performed at its new name the dentry will be readded
* to the dcache hashes.
*/
- is_dir = (sysfs_type(sd) == SYSFS_DIR);
mutex_unlock(&sysfs_mutex);
- if (is_dir) {
- /* If we have submounts we must allow the vfs caches
- * to lie about the state of the filesystem to prevent
- * leaks and other nasty things.
- */
- if (have_submounts(dentry))
- goto out_valid;
- shrink_dcache_parent(dentry);
- }
- d_drop(dentry);
+
+ /* If we have submounts we must allow the vfs caches
+ * to lie about the state of the filesystem to prevent
+ * leaks and other nasty things.
+ */
+ if (check_submounts_and_drop(dentry) != 0)
+ goto out_valid;
+
return 0;
}
@@ -451,7 +447,7 @@ int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd)
if (!!sysfs_ns_type(acxt->parent_sd) != !!sd->s_ns) {
WARN(1, KERN_WARNING "sysfs: ns %s in '%s' for '%s'\n",
- sysfs_ns_type(acxt->parent_sd)? "required": "invalid",
+ sysfs_ns_type(acxt->parent_sd) ? "required" : "invalid",
acxt->parent_sd->s_name, sd->s_name);
return -EINVAL;
}
@@ -619,7 +615,7 @@ struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,
if (!!sysfs_ns_type(parent_sd) != !!ns) {
WARN(1, KERN_WARNING "sysfs: ns %s in '%s' for '%s'\n",
- sysfs_ns_type(parent_sd)? "required": "invalid",
+ sysfs_ns_type(parent_sd) ? "required" : "invalid",
parent_sd->s_name, name);
return NULL;
}
@@ -674,7 +670,7 @@ static int create_dir(struct kobject *kobj, struct sysfs_dirent *parent_sd,
enum kobj_ns_type type, const void *ns, const char *name,
struct sysfs_dirent **p_sd)
{
- umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO;
+ umode_t mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO;
struct sysfs_addrm_cxt acxt;
struct sysfs_dirent *sd;
int rc;
@@ -735,9 +731,9 @@ static enum kobj_ns_type sysfs_read_ns_type(struct kobject *kobj)
/**
* sysfs_create_dir - create a directory for an object.
- * @kobj: object we're creating directory for.
+ * @kobj: object we're creating directory for.
*/
-int sysfs_create_dir(struct kobject * kobj)
+int sysfs_create_dir(struct kobject *kobj)
{
enum kobj_ns_type type;
struct sysfs_dirent *parent_sd, *sd;
@@ -764,8 +760,8 @@ int sysfs_create_dir(struct kobject * kobj)
return error;
}
-static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
- unsigned int flags)
+static struct dentry *sysfs_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int flags)
{
struct dentry *ret = NULL;
struct dentry *parent = dentry->d_parent;
@@ -857,7 +853,7 @@ static void __sysfs_remove_dir(struct sysfs_dirent *dir_sd)
* what used to be sysfs_rmdir() below, instead of calling separately.
*/
-void sysfs_remove_dir(struct kobject * kobj)
+void sysfs_remove_dir(struct kobject *kobj)
{
struct sysfs_dirent *sd = kobj->sd;
@@ -896,7 +892,9 @@ int sysfs_rename(struct sysfs_dirent *sd,
sd->s_name = new_name;
}
- /* Move to the appropriate place in the appropriate directories rbtree. */
+ /*
+ * Move to the appropriate place in the appropriate directories rbtree.
+ */
sysfs_unlink_sibling(sd);
sysfs_get(new_parent_sd);
sysfs_put(sd->s_parent);
@@ -988,20 +986,21 @@ static struct sysfs_dirent *sysfs_dir_next_pos(const void *ns,
struct sysfs_dirent *parent_sd, ino_t ino, struct sysfs_dirent *pos)
{
pos = sysfs_dir_pos(ns, parent_sd, ino, pos);
- if (pos) do {
- struct rb_node *node = rb_next(&pos->s_rb);
- if (!node)
- pos = NULL;
- else
- pos = to_sysfs_dirent(node);
- } while (pos && pos->s_ns != ns);
+ if (pos)
+ do {
+ struct rb_node *node = rb_next(&pos->s_rb);
+ if (!node)
+ pos = NULL;
+ else
+ pos = to_sysfs_dirent(node);
+ } while (pos && pos->s_ns != ns);
return pos;
}
static int sysfs_readdir(struct file *file, struct dir_context *ctx)
{
struct dentry *dentry = file->f_path.dentry;
- struct sysfs_dirent * parent_sd = dentry->d_fsdata;
+ struct sysfs_dirent *parent_sd = dentry->d_fsdata;
struct sysfs_dirent *pos = file->private_data;
enum kobj_ns_type type;
const void *ns;
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index d2bb7ed8fa7..15ef5eb1366 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -20,7 +20,7 @@
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/limits.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include "sysfs.h"
@@ -45,8 +45,8 @@ struct sysfs_open_dirent {
struct sysfs_buffer {
size_t count;
loff_t pos;
- char * page;
- const struct sysfs_ops * ops;
+ char *page;
+ const struct sysfs_ops *ops;
struct mutex mutex;
int needs_read_fill;
int event;
@@ -59,16 +59,16 @@ struct sysfs_buffer {
* @buffer: data buffer for file.
*
* Allocate @buffer->page, if it hasn't been already, then call the
- * kobject's show() method to fill the buffer with this attribute's
- * data.
+ * kobject's show() method to fill the buffer with this attribute's
+ * data.
* This is called only once, on the file's first read unless an error
* is returned.
*/
-static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer)
+static int fill_read_buffer(struct dentry *dentry, struct sysfs_buffer *buffer)
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- const struct sysfs_ops * ops = buffer->ops;
+ const struct sysfs_ops *ops = buffer->ops;
int ret = 0;
ssize_t count;
@@ -106,7 +106,7 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
}
/**
- * sysfs_read_file - read an attribute.
+ * sysfs_read_file - read an attribute.
* @file: file pointer.
* @buf: buffer to fill.
* @count: number of bytes to read.
@@ -127,12 +127,12 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
static ssize_t
sysfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
- struct sysfs_buffer * buffer = file->private_data;
+ struct sysfs_buffer *buffer = file->private_data;
ssize_t retval = 0;
mutex_lock(&buffer->mutex);
if (buffer->needs_read_fill || *ppos == 0) {
- retval = fill_read_buffer(file->f_path.dentry,buffer);
+ retval = fill_read_buffer(file->f_path.dentry, buffer);
if (retval)
goto out;
}
@@ -154,9 +154,8 @@ out:
* Allocate @buffer->page if it hasn't been already, then
* copy the user-supplied buffer into it.
*/
-
-static int
-fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t count)
+static int fill_write_buffer(struct sysfs_buffer *buffer,
+ const char __user *buf, size_t count)
{
int error;
@@ -167,7 +166,7 @@ fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t
if (count >= PAGE_SIZE)
count = PAGE_SIZE - 1;
- error = copy_from_user(buffer->page,buf,count);
+ error = copy_from_user(buffer->page, buf, count);
buffer->needs_read_fill = 1;
/* if buf is assumed to contain a string, terminate it by \0,
so e.g. sscanf() can scan the string easily */
@@ -183,16 +182,15 @@ fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t
* @count: number of bytes
*
* Get the correct pointers for the kobject and the attribute we're
- * dealing with, then call the store() method for the attribute,
+ * dealing with, then call the store() method for the attribute,
* passing the buffer that we acquired in fill_write_buffer().
*/
-
-static int
-flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t count)
+static int flush_write_buffer(struct dentry *dentry,
+ struct sysfs_buffer *buffer, size_t count)
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- const struct sysfs_ops * ops = buffer->ops;
+ const struct sysfs_ops *ops = buffer->ops;
int rc;
/* need attr_sd for attr and ops, its parent for kobj */
@@ -219,15 +217,14 @@ flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t
* then push it to the kobject in flush_write_buffer().
* There is no easy way for us to know if userspace is only doing a partial
* write, so we don't support them. We expect the entire buffer to come
- * on the first write.
+ * on the first write.
* Hint: if you're writing a value, first read the file, modify only the
- * the value you're changing, then write entire buffer back.
+ * the value you're changing, then write entire buffer back.
*/
-
-static ssize_t
-sysfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t sysfs_write_file(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- struct sysfs_buffer * buffer = file->private_data;
+ struct sysfs_buffer *buffer = file->private_data;
ssize_t len;
mutex_lock(&buffer->mutex);
@@ -339,13 +336,14 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
if (kobj->ktype && kobj->ktype->sysfs_ops)
ops = kobj->ktype->sysfs_ops;
else {
- WARN(1, KERN_ERR "missing sysfs attribute operations for "
- "kobject: %s\n", kobject_name(kobj));
+ WARN(1, KERN_ERR
+ "missing sysfs attribute operations for kobject: %s\n",
+ kobject_name(kobj));
goto err_out;
}
/* File needs write support.
- * The inode's perms must say it's ok,
+ * The inode's perms must say it's ok,
* and we must have a store method.
*/
if (file->f_mode & FMODE_WRITE) {
@@ -420,7 +418,7 @@ static int sysfs_release(struct inode *inode, struct file *filp)
*/
static unsigned int sysfs_poll(struct file *filp, poll_table *wait)
{
- struct sysfs_buffer * buffer = filp->private_data;
+ struct sysfs_buffer *buffer = filp->private_data;
struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata;
struct sysfs_open_dirent *od = attr_sd->s_attr.open;
@@ -518,8 +516,9 @@ static int sysfs_attr_ns(struct kobject *kobj, const struct attribute *attr,
ns = ops->namespace(kobj, attr);
out:
if (err) {
- WARN(1, KERN_ERR "missing sysfs namespace attribute operation for "
- "kobject: %s\n", kobject_name(kobj));
+ WARN(1, KERN_ERR
+ "missing sysfs namespace attribute operation for kobject: %s\n",
+ kobject_name(kobj));
}
*pns = ns;
return err;
@@ -566,17 +565,17 @@ int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
/**
* sysfs_create_file - create an attribute file for an object.
- * @kobj: object we're creating for.
+ * @kobj: object we're creating for.
* @attr: attribute descriptor.
*/
-
-int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)
+int sysfs_create_file(struct kobject *kobj, const struct attribute *attr)
{
BUG_ON(!kobj || !kobj->sd || !attr);
return sysfs_add_file(kobj->sd, attr, SYSFS_KOBJ_ATTR);
}
+EXPORT_SYMBOL_GPL(sysfs_create_file);
int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr)
{
@@ -590,6 +589,7 @@ int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr)
sysfs_remove_file(kobj, ptr[i]);
return err;
}
+EXPORT_SYMBOL_GPL(sysfs_create_files);
/**
* sysfs_add_file_to_group - add an attribute file to a pre-existing group.
@@ -654,7 +654,6 @@ int sysfs_chmod_file(struct kobject *kobj, const struct attribute *attr,
}
EXPORT_SYMBOL_GPL(sysfs_chmod_file);
-
/**
* sysfs_remove_file - remove an object attribute.
* @kobj: object we're acting for.
@@ -662,8 +661,7 @@ EXPORT_SYMBOL_GPL(sysfs_chmod_file);
*
* Hash the attribute name and kill the victim.
*/
-
-void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
+void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr)
{
const void *ns;
@@ -672,13 +670,15 @@ void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
sysfs_hash_and_remove(kobj->sd, ns, attr->name);
}
+EXPORT_SYMBOL_GPL(sysfs_remove_file);
-void sysfs_remove_files(struct kobject * kobj, const struct attribute **ptr)
+void sysfs_remove_files(struct kobject *kobj, const struct attribute **ptr)
{
int i;
for (i = 0; ptr[i]; i++)
sysfs_remove_file(kobj, ptr[i]);
}
+EXPORT_SYMBOL_GPL(sysfs_remove_files);
/**
* sysfs_remove_file_from_group - remove an attribute file from a group.
@@ -793,9 +793,3 @@ int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
return 0;
}
EXPORT_SYMBOL_GPL(sysfs_schedule_callback);
-
-
-EXPORT_SYMBOL_GPL(sysfs_create_file);
-EXPORT_SYMBOL_GPL(sysfs_remove_file);
-EXPORT_SYMBOL_GPL(sysfs_remove_files);
-EXPORT_SYMBOL_GPL(sysfs_create_files);
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 09a1a25cd14..5f92cd2f61c 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -3,8 +3,10 @@
*
* Copyright (c) 2003 Patrick Mochel
* Copyright (c) 2003 Open Source Development Lab
+ * Copyright (c) 2013 Greg Kroah-Hartman
+ * Copyright (c) 2013 The Linux Foundation
*
- * This file is released undert the GPL v2.
+ * This file is released undert the GPL v2.
*
*/
@@ -19,8 +21,8 @@
static void remove_files(struct sysfs_dirent *dir_sd, struct kobject *kobj,
const struct attribute_group *grp)
{
- struct attribute *const* attr;
- struct bin_attribute *const* bin_attr;
+ struct attribute *const *attr;
+ struct bin_attribute *const *bin_attr;
if (grp->attrs)
for (attr = grp->attrs; *attr; attr++)
@@ -33,8 +35,8 @@ static void remove_files(struct sysfs_dirent *dir_sd, struct kobject *kobj,
static int create_files(struct sysfs_dirent *dir_sd, struct kobject *kobj,
const struct attribute_group *grp, int update)
{
- struct attribute *const* attr;
- struct bin_attribute *const* bin_attr;
+ struct attribute *const *attr;
+ struct bin_attribute *const *bin_attr;
int error = 0, i;
if (grp->attrs) {
@@ -129,6 +131,41 @@ int sysfs_create_group(struct kobject *kobj,
{
return internal_create_group(kobj, 0, grp);
}
+EXPORT_SYMBOL_GPL(sysfs_create_group);
+
+/**
+ * sysfs_create_groups - given a directory kobject, create a bunch of attribute groups
+ * @kobj: The kobject to create the group on
+ * @groups: The attribute groups to create, NULL terminated
+ *
+ * This function creates a bunch of attribute groups. If an error occurs when
+ * creating a group, all previously created groups will be removed, unwinding
+ * everything back to the original state when this function was called.
+ * It will explicitly warn and error if any of the attribute files being
+ * created already exist.
+ *
+ * Returns 0 on success or error code from sysfs_create_group on error.
+ */
+int sysfs_create_groups(struct kobject *kobj,
+ const struct attribute_group **groups)
+{
+ int error = 0;
+ int i;
+
+ if (!groups)
+ return 0;
+
+ for (i = 0; groups[i]; i++) {
+ error = sysfs_create_group(kobj, groups[i]);
+ if (error) {
+ while (--i >= 0)
+ sysfs_remove_group(kobj, groups[i]);
+ break;
+ }
+ }
+ return error;
+}
+EXPORT_SYMBOL_GPL(sysfs_create_groups);
/**
* sysfs_update_group - given a directory kobject, update an attribute group
@@ -152,11 +189,18 @@ int sysfs_update_group(struct kobject *kobj,
{
return internal_create_group(kobj, 1, grp);
}
+EXPORT_SYMBOL_GPL(sysfs_update_group);
-
-
-void sysfs_remove_group(struct kobject * kobj,
- const struct attribute_group * grp)
+/**
+ * sysfs_remove_group: remove a group from a kobject
+ * @kobj: kobject to remove the group from
+ * @grp: group to remove
+ *
+ * This function removes a group of attributes from a kobject. The attributes
+ * previously have to have been created for this group, otherwise it will fail.
+ */
+void sysfs_remove_group(struct kobject *kobj,
+ const struct attribute_group *grp)
{
struct sysfs_dirent *dir_sd = kobj->sd;
struct sysfs_dirent *sd;
@@ -164,8 +208,9 @@ void sysfs_remove_group(struct kobject * kobj,
if (grp->name) {
sd = sysfs_get_dirent(dir_sd, NULL, grp->name);
if (!sd) {
- WARN(!sd, KERN_WARNING "sysfs group %p not found for "
- "kobject '%s'\n", grp, kobject_name(kobj));
+ WARN(!sd, KERN_WARNING
+ "sysfs group %p not found for kobject '%s'\n",
+ grp, kobject_name(kobj));
return;
}
} else
@@ -177,6 +222,27 @@ void sysfs_remove_group(struct kobject * kobj,
sysfs_put(sd);
}
+EXPORT_SYMBOL_GPL(sysfs_remove_group);
+
+/**
+ * sysfs_remove_groups - remove a list of groups
+ *
+ * @kobj: The kobject for the groups to be removed from
+ * @groups: NULL terminated list of groups to be removed
+ *
+ * If groups is not NULL, remove the specified groups from the kobject.
+ */
+void sysfs_remove_groups(struct kobject *kobj,
+ const struct attribute_group **groups)
+{
+ int i;
+
+ if (!groups)
+ return;
+ for (i = 0; groups[i]; i++)
+ sysfs_remove_group(kobj, groups[i]);
+}
+EXPORT_SYMBOL_GPL(sysfs_remove_groups);
/**
* sysfs_merge_group - merge files into a pre-existing attribute group.
@@ -273,7 +339,3 @@ void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name,
}
}
EXPORT_SYMBOL_GPL(sysfs_remove_link_from_group);
-
-EXPORT_SYMBOL_GPL(sysfs_create_group);
-EXPORT_SYMBOL_GPL(sysfs_update_group);
-EXPORT_SYMBOL_GPL(sysfs_remove_group);
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 3e2837a633e..963f910c803 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -10,7 +10,7 @@
* Please see Documentation/filesystems/sysfs.txt for more information.
*/
-#undef DEBUG
+#undef DEBUG
#include <linux/pagemap.h>
#include <linux/namei.h>
@@ -36,7 +36,7 @@ static struct backing_dev_info sysfs_backing_dev_info = {
.capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK,
};
-static const struct inode_operations sysfs_inode_operations ={
+static const struct inode_operations sysfs_inode_operations = {
.permission = sysfs_permission,
.setattr = sysfs_setattr,
.getattr = sysfs_getattr,
@@ -67,7 +67,7 @@ static struct sysfs_inode_attrs *sysfs_init_inode_attrs(struct sysfs_dirent *sd)
return attrs;
}
-int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr * iattr)
+int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr)
{
struct sysfs_inode_attrs *sd_attrs;
struct iattr *iattrs;
@@ -128,7 +128,8 @@ out:
return error;
}
-static int sysfs_sd_setsecdata(struct sysfs_dirent *sd, void **secdata, u32 *secdata_len)
+static int sysfs_sd_setsecdata(struct sysfs_dirent *sd, void **secdata,
+ u32 *secdata_len)
{
struct sysfs_inode_attrs *iattrs;
void *old_secdata;
@@ -186,13 +187,13 @@ out:
return error;
}
-static inline void set_default_inode_attr(struct inode * inode, umode_t mode)
+static inline void set_default_inode_attr(struct inode *inode, umode_t mode)
{
inode->i_mode = mode;
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
}
-static inline void set_inode_attr(struct inode * inode, struct iattr * iattr)
+static inline void set_inode_attr(struct inode *inode, struct iattr *iattr)
{
inode->i_uid = iattr->ia_uid;
inode->i_gid = iattr->ia_gid;
@@ -220,7 +221,8 @@ static void sysfs_refresh_inode(struct sysfs_dirent *sd, struct inode *inode)
set_nlink(inode, sd->s_dir.subdirs + 2);
}
-int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat)
{
struct sysfs_dirent *sd = dentry->d_fsdata;
struct inode *inode = dentry->d_inode;
@@ -285,7 +287,7 @@ static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
* RETURNS:
* Pointer to allocated inode on success, NULL on failure.
*/
-struct inode * sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd)
+struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd)
{
struct inode *inode;
@@ -312,7 +314,8 @@ void sysfs_evict_inode(struct inode *inode)
sysfs_put(sd);
}
-int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns, const char *name)
+int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns,
+ const char *name)
{
struct sysfs_addrm_cxt acxt;
struct sysfs_dirent *sd;
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index afd83273e6c..834ec2cdb7a 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -64,7 +64,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
/* instantiate and link root dentry */
root = d_make_root(inode);
if (!root) {
- pr_debug("%s: could not get root dentry!\n",__func__);
+ pr_debug("%s: could not get root dentry!\n", __func__);
return -ENOMEM;
}
root->d_fsdata = &sysfs_root;
@@ -112,8 +112,15 @@ static struct dentry *sysfs_mount(struct file_system_type *fs_type,
struct super_block *sb;
int error;
- if (!(flags & MS_KERNMOUNT) && !current_user_ns()->may_mount_sysfs)
- return ERR_PTR(-EPERM);
+ if (!(flags & MS_KERNMOUNT)) {
+ if (!capable(CAP_SYS_ADMIN) && !fs_fully_visible(fs_type))
+ return ERR_PTR(-EPERM);
+
+ for (type = KOBJ_NS_TYPE_NONE; type < KOBJ_NS_TYPES; type++) {
+ if (!kobj_ns_current_may_mount(type))
+ return ERR_PTR(-EPERM);
+ }
+ }
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index 8c940df97a5..2dd4507d9ed 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -125,6 +125,7 @@ int sysfs_create_link(struct kobject *kobj, struct kobject *target,
{
return sysfs_do_create_link(kobj, target, name, 1);
}
+EXPORT_SYMBOL_GPL(sysfs_create_link);
/**
* sysfs_create_link_nowarn - create symlink between two objects.
@@ -166,8 +167,7 @@ void sysfs_delete_link(struct kobject *kobj, struct kobject *targ,
* @kobj: object we're acting for.
* @name: name of the symlink to remove.
*/
-
-void sysfs_remove_link(struct kobject * kobj, const char * name)
+void sysfs_remove_link(struct kobject *kobj, const char *name)
{
struct sysfs_dirent *parent_sd = NULL;
@@ -178,6 +178,7 @@ void sysfs_remove_link(struct kobject * kobj, const char * name)
sysfs_hash_and_remove(parent_sd, NULL, name);
}
+EXPORT_SYMBOL_GPL(sysfs_remove_link);
/**
* sysfs_rename_link - rename symlink in object's directory.
@@ -223,6 +224,7 @@ out:
sysfs_put(sd);
return result;
}
+EXPORT_SYMBOL_GPL(sysfs_rename_link);
static int sysfs_get_target_path(struct sysfs_dirent *parent_sd,
struct sysfs_dirent *target_sd, char *path)
@@ -276,7 +278,7 @@ static int sysfs_get_target_path(struct sysfs_dirent *parent_sd,
return 0;
}
-static int sysfs_getlink(struct dentry *dentry, char * path)
+static int sysfs_getlink(struct dentry *dentry, char *path)
{
struct sysfs_dirent *sd = dentry->d_fsdata;
struct sysfs_dirent *parent_sd = sd->s_parent;
@@ -295,7 +297,7 @@ static void *sysfs_follow_link(struct dentry *dentry, struct nameidata *nd)
int error = -ENOMEM;
unsigned long page = get_zeroed_page(GFP_KERNEL);
if (page) {
- error = sysfs_getlink(dentry, (char *) page);
+ error = sysfs_getlink(dentry, (char *) page);
if (error < 0)
free_page((unsigned long)page);
}
@@ -303,7 +305,8 @@ static void *sysfs_follow_link(struct dentry *dentry, struct nameidata *nd)
return NULL;
}
-static void sysfs_put_link(struct dentry *dentry, struct nameidata *nd, void *cookie)
+static void sysfs_put_link(struct dentry *dentry, struct nameidata *nd,
+ void *cookie)
{
char *page = nd_get_link(nd);
if (!IS_ERR(page))
@@ -319,8 +322,3 @@ const struct inode_operations sysfs_symlink_inode_operations = {
.getattr = sysfs_getattr,
.permission = sysfs_permission,
};
-
-
-EXPORT_SYMBOL_GPL(sysfs_create_link);
-EXPORT_SYMBOL_GPL(sysfs_remove_link);
-EXPORT_SYMBOL_GPL(sysfs_rename_link);
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index d1e4043eb0c..b6deca3e301 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -78,7 +78,7 @@ struct sysfs_dirent {
};
unsigned short s_flags;
- umode_t s_mode;
+ umode_t s_mode;
unsigned int s_ino;
struct sysfs_inode_attrs *s_iattr;
};
@@ -123,9 +123,9 @@ do { \
key = &attr->skey; \
\
lockdep_init_map(&sd->dep_map, "s_active", key, 0); \
-} while(0)
+} while (0)
#else
-#define sysfs_dirent_init_lockdep(sd) do {} while(0)
+#define sysfs_dirent_init_lockdep(sd) do {} while (0)
#endif
/*
@@ -186,8 +186,8 @@ int sysfs_create_subdir(struct kobject *kobj, const char *name,
struct sysfs_dirent **p_sd);
void sysfs_remove_subdir(struct sysfs_dirent *sd);
-int sysfs_rename(struct sysfs_dirent *sd,
- struct sysfs_dirent *new_parent_sd, const void *ns, const char *new_name);
+int sysfs_rename(struct sysfs_dirent *sd, struct sysfs_dirent *new_parent_sd,
+ const void *ns, const char *new_name);
static inline struct sysfs_dirent *__sysfs_get(struct sysfs_dirent *sd)
{
@@ -214,10 +214,12 @@ void sysfs_evict_inode(struct inode *inode);
int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr);
int sysfs_permission(struct inode *inode, int mask);
int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
-int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
+int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat);
int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value,
- size_t size, int flags);
-int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns, const char *name);
+ size_t size, int flags);
+int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns,
+ const char *name);
int sysfs_inode_init(void);
/*
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-27 18:45:20 +0000