sysfs, kernfs: introduce kernfs_remove[_by_name[_ns]]()

Introduce kernfs removal interfaces - kernfs_remove() and
kernfs_remove_by_name[_ns]().

These are just renames of sysfs_remove() and sysfs_hash_and_remove().
No functional changes.

v2: Dummy kernfs_remove_by_name_ns() for !CONFIG_SYSFS updated to
    return -ENOSYS instead of 0.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

5 files changed, 22 insertions, 26 deletions

diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 98701c00b9b0..edbde4e6e5e0 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -829,8 +829,8 @@ static struct sysfs_dirent *sysfs_next_descendant_post(struct sysfs_dirent *pos,
         return pos->s_parent;
 }
 
-static void __sysfs_remove(struct sysfs_addrm_cxt *acxt,
-                           struct sysfs_dirent *sd)
+static void __kernfs_remove(struct sysfs_addrm_cxt *acxt,
+                            struct sysfs_dirent *sd)
 {
         struct sysfs_dirent *pos, *next;
 
@@ -849,22 +849,22 @@ static void __sysfs_remove(struct sysfs_addrm_cxt *acxt,
 }
 
 /**
- * sysfs_remove - remove a sysfs_dirent recursively
+ * kernfs_remove - remove a sysfs_dirent recursively
  * @sd: the sysfs_dirent to remove
  *
  * Remove @sd along with all its subdirectories and files.
  */
-void sysfs_remove(struct sysfs_dirent *sd)
+void kernfs_remove(struct sysfs_dirent *sd)
 {
         struct sysfs_addrm_cxt acxt;
 
         sysfs_addrm_start(&acxt);
-        __sysfs_remove(&acxt, sd);
+        __kernfs_remove(&acxt, sd);
         sysfs_addrm_finish(&acxt);
 }
 
 /**
- * sysfs_hash_and_remove - find a sysfs_dirent by name and remove it
+ * kernfs_remove_by_name_ns - find a sysfs_dirent by name and remove it
  * @dir_sd: parent of the target
  * @name: name of the sysfs_dirent to remove
  * @ns: namespace tag of the sysfs_dirent to remove
@@ -872,8 +872,8 @@ void sysfs_remove(struct sysfs_dirent *sd)
  * Look for the sysfs_dirent with @name and @ns under @dir_sd and remove
  * it.  Returns 0 on success, -ENOENT if such entry doesn't exist.
  */
-int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name,
-                          const void *ns)
+int kernfs_remove_by_name_ns(struct sysfs_dirent *dir_sd, const char *name,
+                             const void *ns)
 {
         struct sysfs_addrm_cxt acxt;
         struct sysfs_dirent *sd;
@@ -888,7 +888,7 @@ int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name,
 
         sd = sysfs_find_dirent(dir_sd, name, ns);
         if (sd)
-                __sysfs_remove(&acxt, sd);
+                __kernfs_remove(&acxt, sd);
 
         sysfs_addrm_finish(&acxt);
 
@@ -928,7 +928,7 @@ void sysfs_remove_dir(struct kobject *kobj)
 
         if (sd) {
                 WARN_ON_ONCE(sysfs_type(sd) != SYSFS_DIR);
-                sysfs_remove(sd);
+                kernfs_remove(sd);
         }
 }
 
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 79b5da2acbe1..5664410136ba 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -952,7 +952,7 @@ 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, attr->name, ns);
+        kernfs_remove_by_name_ns(dir_sd, attr->name, ns);
 }
 EXPORT_SYMBOL_GPL(sysfs_remove_file_ns);
 
@@ -980,7 +980,7 @@ 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, attr->name, NULL);
+                kernfs_remove_by_name(dir_sd, attr->name);
                 sysfs_put(dir_sd);
         }
 }
@@ -1008,7 +1008,7 @@ 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, attr->attr.name, NULL);
+        kernfs_remove_by_name(kobj->sd, attr->attr.name);
 }
 EXPORT_SYMBOL_GPL(sysfs_remove_bin_file);
 
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 1898a10e38ce..4bd997340830 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -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, (*attr)->name, NULL);
+                        kernfs_remove_by_name(dir_sd, (*attr)->name);
         if (grp->bin_attrs)
                 for (bin_attr = grp->bin_attrs; *bin_attr; bin_attr++)
                         sysfs_remove_bin_file(kobj, *bin_attr);
@@ -49,8 +49,7 @@ 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, (*attr)->name,
-                                                      NULL);
+                                kernfs_remove_by_name(dir_sd, (*attr)->name);
                         if (grp->is_visible) {
                                 mode = grp->is_visible(kobj, *attr, i);
                                 if (!mode)
@@ -111,7 +110,7 @@ static int internal_create_group(struct kobject *kobj, int update,
         error = create_files(sd, kobj, grp, update);
         if (error) {
                 if (grp->name)
-                        sysfs_remove(sd);
+                        kernfs_remove(sd);
         }
         sysfs_put(sd);
         return error;
@@ -219,7 +218,7 @@ void sysfs_remove_group(struct kobject *kobj,
 
         remove_files(sd, kobj, grp);
         if (grp->name)
-                sysfs_remove(sd);
+                kernfs_remove(sd);
 
         sysfs_put(sd);
 }
@@ -270,7 +269,7 @@ 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, (*--attr)->name, NULL);
+                        kernfs_remove_by_name(dir_sd, (*--attr)->name);
         }
         sysfs_put(dir_sd);
 
@@ -292,7 +291,7 @@ 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, (*attr)->name, NULL);
+                        kernfs_remove_by_name(dir_sd, (*attr)->name);
                 sysfs_put(dir_sd);
         }
 }
@@ -335,7 +334,7 @@ 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, link_name, NULL);
+                kernfs_remove_by_name(dir_sd, link_name);
                 sysfs_put(dir_sd);
         }
 }
diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index c660363fdaea..71583fc8100a 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -153,7 +153,7 @@ void sysfs_delete_link(struct kobject *kobj, struct kobject *targ,
         if (targ->sd && (kobj->sd->s_flags & SYSFS_FLAG_NS))
                 ns = targ->sd->s_ns;
         spin_unlock(&sysfs_symlink_target_lock);
-        sysfs_hash_and_remove(kobj->sd, name, ns);
+        kernfs_remove_by_name_ns(kobj->sd, name, ns);
 }
 
 /**
@@ -170,7 +170,7 @@ void sysfs_remove_link(struct kobject *kobj, const char *name)
         else
                 parent_sd = kobj->sd;
 
-        sysfs_hash_and_remove(parent_sd, name, NULL);
+        kernfs_remove_by_name(parent_sd, name);
 }
 EXPORT_SYMBOL_GPL(sysfs_remove_link);
 
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index e116c21a27bf..97625b15ca03 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -173,9 +173,6 @@ int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd,
                     struct sysfs_dirent *parent_sd);
 int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd,
                   struct sysfs_dirent *parent_sd);
-void sysfs_remove(struct sysfs_dirent *sd);
-int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name,
-                          const void *ns);
 void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
 
 struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,