Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit cfec0bc8 authored by Tejun Heo's avatar Tejun Heo Committed by Greg Kroah-Hartman
Browse files

sysfs: @name comes before @ns 



Some internal sysfs functions which take explicit namespace argument
are weird in that they place the optional @ns in front of @name which
is contrary to the established convention.  This is confusing and
error-prone especially as @ns and @name may be interchanged without
causing compilation warning.

Swap the positions of @name and @ns in the following internal
functions.

 sysfs_find_dirent()
 sysfs_rename()
 sysfs_hash_and_remove()
 sysfs_name_hash()
 sysfs_name_compare()
 create_dir()

This patch doesn't introduce any functional changes.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Kay Sievers <kay@vrfy.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 388975cc

fs/sysfs/bin.c

+1 −1
Original line number Diff line number Diff line
@@ -497,6 +497,6 @@ EXPORT_SYMBOL_GPL(sysfs_create_bin_file); 
void sysfs_remove_bin_file(struct kobject *kobj,

			   const struct bin_attribute *attr)

{

	sysfs_hash_and_remove(kobj->sd, NULL, attr->attr.name);

	sysfs_hash_and_remove(kobj->sd, attr->attr.name, NULL);

}

EXPORT_SYMBOL_GPL(sysfs_remove_bin_file);

fs/sysfs/dir.c

+23 −22
Original line number Diff line number Diff line
@@ -35,12 +35,12 @@ static DEFINE_IDA(sysfs_ino_ida); 


/**

 *	sysfs_name_hash

 *	@ns:   Namespace tag to hash

 *	@name: Null terminated string to hash

 *	@ns:   Namespace tag to hash

 *

 *	Returns 31 bit hash of ns + name (so it fits in an off_t )

 */

static unsigned int sysfs_name_hash(const void *ns, const char *name)

static unsigned int sysfs_name_hash(const char *name, const void *ns)

{

	unsigned long hash = init_name_hash();

	unsigned int len = strlen(name);
@@ -56,8 +56,8 @@ static unsigned int sysfs_name_hash(const void *ns, const char *name) 
	return hash;

}



static int sysfs_name_compare(unsigned int hash, const void *ns,

	const char *name, const struct sysfs_dirent *sd)

static int sysfs_name_compare(unsigned int hash, const char *name,

			      const void *ns, const struct sysfs_dirent *sd)

{

	if (hash != sd->s_hash)

		return hash - sd->s_hash;
@@ -69,7 +69,7 @@ static int sysfs_name_compare(unsigned int hash, const void *ns, 
static int sysfs_sd_compare(const struct sysfs_dirent *left,

			    const struct sysfs_dirent *right)

{

	return sysfs_name_compare(left->s_hash, left->s_ns, left->s_name,

	return sysfs_name_compare(left->s_hash, left->s_name, left->s_ns,

				  right);

}
@@ -451,7 +451,7 @@ int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd) 
	struct sysfs_inode_attrs *ps_iattr;

	int ret;



	sd->s_hash = sysfs_name_hash(sd->s_ns, sd->s_name);

	sd->s_hash = sysfs_name_hash(sd->s_name, sd->s_ns);

	sd->s_parent = sysfs_get(acxt->parent_sd);



	ret = sysfs_link_sibling(sd);
@@ -596,6 +596,7 @@ void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt) 
 *	sysfs_find_dirent - find sysfs_dirent with the given name

 *	@parent_sd: sysfs_dirent to search under

 *	@name: name to look for

 *	@ns: the namespace tag to use

 *

 *	Look for sysfs_dirent with name @name under @parent_sd.

 *
@@ -606,19 +607,19 @@ void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt) 
 *	Pointer to sysfs_dirent if found, NULL if not.

 */

struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,

				       const void *ns,

				       const unsigned char *name)

				       const unsigned char *name,

				       const void *ns)

{

	struct rb_node *node = parent_sd->s_dir.children.rb_node;

	unsigned int hash;



	hash = sysfs_name_hash(ns, name);

	hash = sysfs_name_hash(name, ns);

	while (node) {

		struct sysfs_dirent *sd;

		int result;



		sd = to_sysfs_dirent(node);

		result = sysfs_name_compare(hash, ns, name, sd);

		result = sysfs_name_compare(hash, name, ns, sd);

		if (result < 0)

			node = node->rb_left;

		else if (result > 0)
@@ -651,7 +652,7 @@ struct sysfs_dirent *sysfs_get_dirent_ns(struct sysfs_dirent *parent_sd, 
	struct sysfs_dirent *sd;



	mutex_lock(&sysfs_mutex);

	sd = sysfs_find_dirent(parent_sd, ns, name);

	sd = sysfs_find_dirent(parent_sd, name, ns);

	sysfs_get(sd);

	mutex_unlock(&sysfs_mutex);
@@ -660,7 +661,8 @@ struct sysfs_dirent *sysfs_get_dirent_ns(struct sysfs_dirent *parent_sd, 
EXPORT_SYMBOL_GPL(sysfs_get_dirent_ns);



static int create_dir(struct kobject *kobj, struct sysfs_dirent *parent_sd,

	const void *ns, const char *name, struct sysfs_dirent **p_sd)

		      const char *name, const void *ns,

		      struct sysfs_dirent **p_sd)

{

	umode_t mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO;

	struct sysfs_addrm_cxt acxt;
@@ -691,7 +693,7 @@ static int create_dir(struct kobject *kobj, struct sysfs_dirent *parent_sd, 
int sysfs_create_subdir(struct kobject *kobj, const char *name,

			struct sysfs_dirent **p_sd)

{

	return create_dir(kobj, kobj->sd, NULL, name, p_sd);

	return create_dir(kobj, kobj->sd, name, NULL, p_sd);

}



/**
@@ -714,7 +716,7 @@ int sysfs_create_dir_ns(struct kobject *kobj, const void *ns) 
	if (!parent_sd)

		return -ENOENT;



	error = create_dir(kobj, parent_sd, ns, kobject_name(kobj), &sd);

	error = create_dir(kobj, parent_sd, kobject_name(kobj), ns, &sd);

	if (!error)

		kobj->sd = sd;

	return error;
@@ -735,7 +737,7 @@ static struct dentry *sysfs_lookup(struct inode *dir, struct dentry *dentry, 
	if (parent_sd->s_flags & SYSFS_FLAG_HAS_NS)

		ns = sysfs_info(dir->i_sb)->ns;



	sd = sysfs_find_dirent(parent_sd, ns, dentry->d_name.name);

	sd = sysfs_find_dirent(parent_sd, dentry->d_name.name, ns);



	/* no such entry */

	if (!sd) {
@@ -823,9 +825,8 @@ void sysfs_remove_dir(struct kobject *kobj) 
	__sysfs_remove_dir(sd);

}



int sysfs_rename(struct sysfs_dirent *sd,

	struct sysfs_dirent *new_parent_sd, const void *new_ns,

	const char *new_name)

int sysfs_rename(struct sysfs_dirent *sd, struct sysfs_dirent *new_parent_sd,

		 const char *new_name, const void *new_ns)

{

	int error;
@@ -837,7 +838,7 @@ int sysfs_rename(struct sysfs_dirent *sd, 
		goto out;	/* nothing to rename */



	error = -EEXIST;

	if (sysfs_find_dirent(new_parent_sd, new_ns, new_name))

	if (sysfs_find_dirent(new_parent_sd, new_name, new_ns))

		goto out;



	/* rename sysfs_dirent */
@@ -858,7 +859,7 @@ int sysfs_rename(struct sysfs_dirent *sd, 
	sysfs_get(new_parent_sd);

	sysfs_put(sd->s_parent);

	sd->s_ns = new_ns;

	sd->s_hash = sysfs_name_hash(sd->s_ns, sd->s_name);

	sd->s_hash = sysfs_name_hash(sd->s_name, sd->s_ns);

	sd->s_parent = new_parent_sd;

	sysfs_link_sibling(sd);
@@ -873,7 +874,7 @@ int sysfs_rename_dir_ns(struct kobject *kobj, const char *new_name, 
{

	struct sysfs_dirent *parent_sd = kobj->sd->s_parent;



	return sysfs_rename(kobj->sd, parent_sd, new_ns, new_name);

	return sysfs_rename(kobj->sd, parent_sd, new_name, new_ns);

}



int sysfs_move_dir_ns(struct kobject *kobj, struct kobject *new_parent_kobj,
@@ -886,7 +887,7 @@ int sysfs_move_dir_ns(struct kobject *kobj, struct kobject *new_parent_kobj, 
	new_parent_sd = new_parent_kobj && new_parent_kobj->sd ?

		new_parent_kobj->sd : &sysfs_root;



	return sysfs_rename(sd, new_parent_sd, new_ns, sd->s_name);

	return sysfs_rename(sd, new_parent_sd, sd->s_name, new_ns);

}



/* Relationship between s_mode and the DT_xxx types */

fs/sysfs/file.c

+5 −5
Original line number Diff line number Diff line
@@ -466,9 +466,9 @@ void sysfs_notify(struct kobject *k, const char *dir, const char *attr) 
	mutex_lock(&sysfs_mutex);



	if (sd && dir)

		sd = sysfs_find_dirent(sd, NULL, dir);

		sd = sysfs_find_dirent(sd, dir, NULL);

	if (sd && attr)

		sd = sysfs_find_dirent(sd, NULL, attr);

		sd = sysfs_find_dirent(sd, attr, NULL);

	if (sd)

		sysfs_notify_dirent(sd);
@@ -594,7 +594,7 @@ int sysfs_chmod_file(struct kobject *kobj, const struct attribute *attr, 
	mutex_lock(&sysfs_mutex);



	rc = -ENOENT;

	sd = sysfs_find_dirent(kobj->sd, NULL, attr->name);

	sd = sysfs_find_dirent(kobj->sd, attr->name, NULL);

	if (!sd)

		goto out;
@@ -621,7 +621,7 @@ void sysfs_remove_file_ns(struct kobject *kobj, const struct attribute *attr, 
{

	struct sysfs_dirent *dir_sd = kobj->sd;



	sysfs_hash_and_remove(dir_sd, ns, attr->name);

	sysfs_hash_and_remove(dir_sd, attr->name, ns);

}

EXPORT_SYMBOL_GPL(sysfs_remove_file_ns);
@@ -649,7 +649,7 @@ void sysfs_remove_file_from_group(struct kobject *kobj, 
	else

		dir_sd = sysfs_get(kobj->sd);

	if (dir_sd) {

		sysfs_hash_and_remove(dir_sd, NULL, attr->name);

		sysfs_hash_and_remove(dir_sd, attr->name, NULL);

		sysfs_put(dir_sd);

	}

}

fs/sysfs/group.c

+6 −6
Original line number Diff line number Diff line
@@ -26,7 +26,7 @@ static void remove_files(struct sysfs_dirent *dir_sd, struct kobject *kobj, 


	if (grp->attrs)

		for (attr = grp->attrs; *attr; attr++)

			sysfs_hash_and_remove(dir_sd, NULL, (*attr)->name);

			sysfs_hash_and_remove(dir_sd, (*attr)->name, NULL);

	if (grp->bin_attrs)

		for (bin_attr = grp->bin_attrs; *bin_attr; bin_attr++)

			sysfs_remove_bin_file(kobj, *bin_attr);
@@ -49,8 +49,8 @@ static int create_files(struct sysfs_dirent *dir_sd, struct kobject *kobj, 
			 * re-adding (if required) the file.

			 */

			if (update)

				sysfs_hash_and_remove(dir_sd, NULL,

						      (*attr)->name);

				sysfs_hash_and_remove(dir_sd, (*attr)->name,

						      NULL);

			if (grp->is_visible) {

				mode = grp->is_visible(kobj, *attr, i);

				if (!mode)
@@ -270,7 +270,7 @@ int sysfs_merge_group(struct kobject *kobj, 
		error = sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR);

	if (error) {

		while (--i >= 0)

			sysfs_hash_and_remove(dir_sd, NULL, (*--attr)->name);

			sysfs_hash_and_remove(dir_sd, (*--attr)->name, NULL);

	}

	sysfs_put(dir_sd);
@@ -292,7 +292,7 @@ void sysfs_unmerge_group(struct kobject *kobj, 
	dir_sd = sysfs_get_dirent(kobj->sd, grp->name);

	if (dir_sd) {

		for (attr = grp->attrs; *attr; ++attr)

			sysfs_hash_and_remove(dir_sd, NULL, (*attr)->name);

			sysfs_hash_and_remove(dir_sd, (*attr)->name, NULL);

		sysfs_put(dir_sd);

	}

}
@@ -335,7 +335,7 @@ void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name, 


	dir_sd = sysfs_get_dirent(kobj->sd, group_name);

	if (dir_sd) {

		sysfs_hash_and_remove(dir_sd, NULL, link_name);

		sysfs_hash_and_remove(dir_sd, link_name, NULL);

		sysfs_put(dir_sd);

	}

}

fs/sysfs/inode.c

+3 −3
Original line number Diff line number Diff line
@@ -314,8 +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 char *name,

			  const void *ns)

{

	struct sysfs_addrm_cxt acxt;

	struct sysfs_dirent *sd;
@@ -328,7 +328,7 @@ int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns, 


	sysfs_addrm_start(&acxt, dir_sd);



	sd = sysfs_find_dirent(dir_sd, ns, name);

	sd = sysfs_find_dirent(dir_sd, name, ns);

	if (sd)

		sysfs_remove_one(&acxt, sd);