[PATCH] sysfs-iattr: set inode attributes
o Following patch sets the attributes for newly allocated inodes for sysfs
objects. If the object has non-default attributes, inode attributes are
set as saved in sysfs_dirent->s_iattr, pointer to struct iattr.
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 400c90b..565cac1 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -91,18 +91,42 @@
return error;
}
-struct inode * sysfs_new_inode(mode_t mode)
+static inline void set_default_inode_attr(struct inode * inode, mode_t mode)
+{
+ inode->i_mode = mode;
+ inode->i_uid = 0;
+ inode->i_gid = 0;
+ inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+}
+
+static inline void set_inode_attr(struct inode * inode, struct iattr * iattr)
+{
+ inode->i_mode = iattr->ia_mode;
+ inode->i_uid = iattr->ia_uid;
+ inode->i_gid = iattr->ia_gid;
+ inode->i_atime = iattr->ia_atime;
+ inode->i_mtime = iattr->ia_mtime;
+ inode->i_ctime = iattr->ia_ctime;
+}
+
+struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent * sd)
{
struct inode * inode = new_inode(sysfs_sb);
if (inode) {
- inode->i_mode = mode;
- inode->i_uid = 0;
- inode->i_gid = 0;
inode->i_blksize = PAGE_CACHE_SIZE;
inode->i_blocks = 0;
- inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
inode->i_mapping->a_ops = &sysfs_aops;
inode->i_mapping->backing_dev_info = &sysfs_backing_dev_info;
+ inode->i_op = &sysfs_inode_operations;
+
+ if (sd->s_iattr) {
+ /* sysfs_dirent has non-default attributes
+ * get them for the new inode from persistent copy
+ * in sysfs_dirent
+ */
+ set_inode_attr(inode, sd->s_iattr);
+ } else
+ set_default_inode_attr(inode, mode);
}
return inode;
}
@@ -113,7 +137,8 @@
struct inode * inode = NULL;
if (dentry) {
if (!dentry->d_inode) {
- if ((inode = sysfs_new_inode(mode))) {
+ struct sysfs_dirent * sd = dentry->d_fsdata;
+ if ((inode = sysfs_new_inode(mode, sd))) {
if (dentry->d_parent && dentry->d_parent->d_inode) {
struct inode *p_inode = dentry->d_parent->d_inode;
p_inode->i_mtime = p_inode->i_ctime = CURRENT_TIME;
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 5c805bb..f1117e8 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -28,6 +28,7 @@
.s_children = LIST_HEAD_INIT(sysfs_root.s_children),
.s_element = NULL,
.s_type = SYSFS_ROOT,
+ .s_iattr = NULL,
};
static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
@@ -42,7 +43,8 @@
sb->s_time_gran = 1;
sysfs_sb = sb;
- inode = sysfs_new_inode(S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO);
+ inode = sysfs_new_inode(S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
+ &sysfs_root);
if (inode) {
inode->i_op = &sysfs_dir_inode_operations;
inode->i_fop = &sysfs_dir_operations;
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index e8e9f0c..29da6f5 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -2,7 +2,7 @@
extern struct vfsmount * sysfs_mount;
extern kmem_cache_t *sysfs_dir_cachep;
-extern struct inode * sysfs_new_inode(mode_t mode);
+extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *);
extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *,