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 52eed2a7a5e..f318b73c790 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);
 }