[PATCH 4.2.y-ckt 17/53] vfs: add vfs_select_inode() helper

From: Kamal Mostafa
Date: Tue May 24 2016 - 14:06:55 EST


4.2.8-ckt11 -stable review patch. If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Miklos Szeredi <mszeredi@xxxxxxxxxx>

commit 54d5ca871e72f2bb172ec9323497f01cd5091ec7 upstream.

Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
fs/open.c | 12 ++++--------
include/linux/dcache.h | 12 ++++++++++++
2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/fs/open.c b/fs/open.c
index 50958c2..4dc4892 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -840,16 +840,12 @@ EXPORT_SYMBOL(file_path);
int vfs_open(const struct path *path, struct file *file,
const struct cred *cred)
{
- struct dentry *dentry = path->dentry;
- struct inode *inode = dentry->d_inode;
+ struct inode *inode = vfs_select_inode(path->dentry, file->f_flags);

- file->f_path = *path;
- if (dentry->d_flags & DCACHE_OP_SELECT_INODE) {
- inode = dentry->d_op->d_select_inode(dentry, file->f_flags);
- if (IS_ERR(inode))
- return PTR_ERR(inode);
- }
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);

+ file->f_path = *path;
return do_dentry_open(file, inode, NULL, cred);
}

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 9c6a4fd..92470d7 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -593,4 +593,16 @@ static inline struct dentry *d_real(struct dentry *dentry)
return dentry;
}

+static inline struct inode *vfs_select_inode(struct dentry *dentry,
+ unsigned open_flags)
+{
+ struct inode *inode = d_inode(dentry);
+
+ if (inode && unlikely(dentry->d_flags & DCACHE_OP_SELECT_INODE))
+ inode = dentry->d_op->d_select_inode(dentry, open_flags);
+
+ return inode;
+}
+
+
#endif /* __LINUX_DCACHE_H */
--
2.7.4