[PATCH v2 05/13] fs: ramfs: add device file support

[Sascha Hauer]

Implement the mknod hook in ramfs for creating device special files.

Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
---
 fs/ramfs.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/fs/ramfs.c b/fs/ramfs.c
index 
1caace0183a58e8a07001eb6ce9df8ea1895ac0b..d86bf6144e8485269c589ba0024377f9852a8eaa
 100644
--- a/fs/ramfs.c
+++ b/fs/ramfs.c
@@ -89,6 +89,9 @@ static struct inode *ramfs_get_inode(struct super_block *sb, 
const struct inode
        case S_IFLNK:
                inode->i_op = &ramfs_symlink_inode_operations;
                break;
+       case S_IFBLK:
+       case S_IFCHR:
+               break;
        }
 
        return inode;
@@ -149,6 +152,20 @@ static int ramfs_create(struct inode *dir, struct dentry 
*dentry, umode_t mode)
        return ramfs_mknod(dir, dentry, mode | S_IFREG);
 }
 
+static int __ramfs_mknod(struct inode *dir,struct dentry *dentry, umode_t mode,
+                        const char *cdevname)
+{
+       int ret;
+
+       ret = ramfs_mknod(dir, dentry, mode);
+       if (ret)
+               return ret;
+
+       init_special_inode(dentry->d_inode, mode, cdevname);
+
+       return 0;
+}
+
 static int ramfs_symlink(struct inode *dir, struct dentry *dentry,
                         const char *symname)
 {
@@ -196,6 +213,7 @@ static const struct inode_operations 
ramfs_dir_inode_operations =
        .unlink = simple_unlink,
        .create = ramfs_create,
        .tmpfile = ramfs_tmpfile,
+       .mknod = __ramfs_mknod,
 };
 
 static struct ramfs_chunk *ramfs_find_chunk(struct ramfs_inode *node,

-- 
2.47.3