sysfs: make kobj point to sysfs_dirent instead of dentry

As kobj sysfs dentries and inodes are gonna be made reclaimable,
dentry can't be used as naming token for sysfs file/directory, replace
kobj->dentry with kobj->sd.  The only external interface change is
shadow directory handling.  All other changes are contained in kobj
and sysfs.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 27 insertions, 28 deletions

diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 52eed2a7a5ef..f318b73c790c 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -18,26 +18,25 @@
 #include "sysfs.h"
 
 
-static void remove_files(struct dentry * dir, 
-                         const struct attribute_group * grp)
+static void remove_files(struct sysfs_dirent *dir_sd,
+                         const struct attribute_group *grp)
 {
         struct attribute *const* attr;
 
         for (attr = grp->attrs; *attr; attr++)
-                sysfs_hash_and_remove(dir,(*attr)->name);
+                sysfs_hash_and_remove(dir_sd, (*attr)->name);
 }
 
-static int create_files(struct dentry * dir,
-                        const struct attribute_group * grp)
+static int create_files(struct sysfs_dirent *dir_sd,
+                        const struct attribute_group *grp)
 {
         struct attribute *const* attr;
         int error = 0;
 
-        for (attr = grp->attrs; *attr && !error; attr++) {
-                error = sysfs_add_file(dir, *attr, SYSFS_KOBJ_ATTR);
-        }
+        for (attr = grp->attrs; *attr && !error; attr++)
+                error = sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR);
         if (error)
-                remove_files(dir,grp);
+                remove_files(dir_sd, grp);
         return error;
 }
 
@@ -45,44 +44,44 @@ static int create_files(struct dentry * dir,
 int sysfs_create_group(struct kobject * kobj, 
                        const struct attribute_group * grp)
 {
-        struct dentry * dir;
+        struct sysfs_dirent *sd;
         int error;
 
-        BUG_ON(!kobj || !kobj->dentry);
+        BUG_ON(!kobj || !kobj->sd);
 
         if (grp->name) {
-                error = sysfs_create_subdir(kobj,grp->name,&dir);
+                error = sysfs_create_subdir(kobj, grp->name, &sd);
                 if (error)
                         return error;
         } else
-                dir = kobj->dentry;
-        dir = dget(dir);
-        if ((error = create_files(dir,grp))) {
+                sd = kobj->sd;
+        sysfs_get(sd);
+        error = create_files(sd, grp);
+        if (error) {
                 if (grp->name)
-                        sysfs_remove_subdir(dir);
+                        sysfs_remove_subdir(sd);
         }
-        dput(dir);
+        sysfs_put(sd);
         return error;
 }
 
 void sysfs_remove_group(struct kobject * kobj, 
                         const struct attribute_group * grp)
 {
-        struct dentry * dir;
+        struct sysfs_dirent *dir_sd = kobj->sd;
+        struct sysfs_dirent *sd;
 
         if (grp->name) {
-                dir = lookup_one_len_kern(grp->name, kobj->dentry,
-                                strlen(grp->name));
-                BUG_ON(IS_ERR(dir));
-        }
-        else
-                dir = dget(kobj->dentry);
+                sd = sysfs_get_dirent(dir_sd, grp->name);
+                BUG_ON(!sd);
+        } else
+                sd = sysfs_get(dir_sd);
 
-        remove_files(dir,grp);
+        remove_files(sd, grp);
         if (grp->name)
-                sysfs_remove_subdir(dir);
-        /* release the ref. taken in this routine */
-        dput(dir);
+                sysfs_remove_subdir(sd);
+
+        sysfs_put(sd);
 }