[PATCH V2 2/2 linux-next] affs: add tmpfile support

[Fabian Frederick <fabf@skynet.be>]

Based on the following patch:
commit 60545d0d4610 ("[O_TMPFILE] it's still short a few helpers,
 but infrastructure should be OK now...")

Tested with xfstests generic/004

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
---
V2: add Reviewed-by

 fs/affs/affs.h  |  1 +
 fs/affs/dir.c   |  1 +
 fs/affs/namei.c | 23 +++++++++++++++++++++++
 3 files changed, 25 insertions(+)

diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index cffe837..c3f60a5 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -180,6 +180,7 @@ extern int	affs_rename(struct inode *old_dir, struct dentry *old_dentry,
 extern unsigned long		 affs_parent_ino(struct inode *dir);
 extern struct inode		*affs_new_inode(struct inode *dir);
 extern int			 affs_notify_change(struct dentry *dentry, struct iattr *attr);
+extern int affs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode);
 extern void			 affs_evict_inode(struct inode *inode);
 extern struct inode		*affs_iget(struct super_block *sb,
 					unsigned long ino);
diff --git a/fs/affs/dir.c b/fs/affs/dir.c
index ac4f318..2b0e5ea 100644
--- a/fs/affs/dir.c
+++ b/fs/affs/dir.c
@@ -37,6 +37,7 @@ const struct inode_operations affs_dir_inode_operations = {
 	.rmdir		= affs_rmdir,
 	.rename		= affs_rename,
 	.setattr	= affs_notify_change,
+	.tmpfile	= affs_tmpfile,
 };
 
 static int
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index b183540..7c3909a 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -466,3 +466,26 @@ done:
 	affs_brelse(bh);
 	return retval;
 }
+
+int affs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+
+	struct super_block *sb = dir->i_sb;
+	struct affs_sb_info *sbi = AFFS_SB(sb);
+	struct inode *inode;
+
+	inode = affs_new_inode(dir);
+	if (!inode)
+		return -ENOSPC;
+
+	inode->i_mode = mode;
+	mode_to_prot(inode);
+	inode->i_mapping->a_ops = affs_test_opt(sbi->s_flags, SF_OFS) ?
+				  &affs_aops_ofs : &affs_aops;
+	inode->i_op = &affs_file_inode_operations;
+	inode->i_fop = &affs_file_operations;
+	mark_inode_dirty(inode);
+	d_tmpfile(dentry, inode);
+	unlock_new_inode(inode);
+	return 0;
+}
-- 
2.4.0