[RFC PATCH 28/35] Revert "vfs: add flags to d_real()"

From: Miklos Szeredi
Date: Thu Apr 12 2018 - 11:12:18 EST


This reverts commit 495e642939114478a5237a7d91661ba93b76f15a.

No user of "flags" argument of d_real() remain.

Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
---
Documentation/filesystems/Locking | 2 +-
Documentation/filesystems/vfs.txt | 2 +-
fs/open.c | 2 +-
fs/overlayfs/super.c | 4 ++--
include/linux/dcache.h | 11 +++++------
include/linux/fs.h | 2 +-
6 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 60e76060baff..a4afe96f0112 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -22,7 +22,7 @@ prototypes:
struct vfsmount *(*d_automount)(struct path *path);
int (*d_manage)(const struct path *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
- unsigned int, unsigned int);
+ unsigned int);

locking rules:
rename_lock ->d_lock may block rcu-walk
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 2bc77ea8aef4..af54d3651ff8 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -991,7 +991,7 @@ struct dentry_operations {
struct vfsmount *(*d_automount)(struct path *);
int (*d_manage)(const struct path *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
- unsigned int, unsigned int);
+ unsigned int);
};

d_revalidate: called when the VFS needs to revalidate a dentry. This
diff --git a/fs/open.c b/fs/open.c
index 00b1f18475ba..73f3d0f35742 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -96,7 +96,7 @@ long vfs_truncate(const struct path *path, loff_t length)
* write access on the upper inode, not on the overlay inode. For
* non-overlay filesystems d_real() is an identity function.
*/
- upperdentry = d_real(path->dentry, NULL, O_WRONLY, 0);
+ upperdentry = d_real(path->dentry, NULL, O_WRONLY);
error = PTR_ERR(upperdentry);
if (IS_ERR(upperdentry))
goto mnt_drop_write_and_out;
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 006dc70d7425..7779fc610767 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -98,7 +98,7 @@ static int ovl_check_append_only(struct inode *inode, int flag)

static struct dentry *ovl_d_real(struct dentry *dentry,
const struct inode *inode,
- unsigned int open_flags, unsigned int flags)
+ unsigned int open_flags)
{
struct dentry *real;
int err;
@@ -134,7 +134,7 @@ static struct dentry *ovl_d_real(struct dentry *dentry,
goto bug;

/* Handle recursion */
- real = d_real(real, inode, open_flags, 0);
+ real = d_real(real, inode, open_flags);

if (!inode || inode == d_inode(real))
return real;
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 4c7ab11c627a..8ca25ea3b9db 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -148,7 +148,7 @@ struct dentry_operations {
struct vfsmount *(*d_automount)(struct path *);
int (*d_manage)(const struct path *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
- unsigned int, unsigned int);
+ unsigned int);
} ____cacheline_aligned;

/*
@@ -569,8 +569,7 @@ static inline struct dentry *d_backing_dentry(struct dentry *upper)
* d_real - Return the real dentry
* @dentry: the dentry to query
* @inode: inode to select the dentry from multiple layers (can be NULL)
- * @open_flags: open flags to control copy-up behavior
- * @flags: flags to control what is returned by this function
+ * @flags: open flags to control copy-up behavior
*
* If dentry is on a union/overlay, then return the underlying, real dentry.
* Otherwise return the dentry itself.
@@ -579,10 +578,10 @@ static inline struct dentry *d_backing_dentry(struct dentry *upper)
*/
static inline struct dentry *d_real(struct dentry *dentry,
const struct inode *inode,
- unsigned int open_flags, unsigned int flags)
+ unsigned int flags)
{
if (unlikely(dentry->d_flags & DCACHE_OP_REAL))
- return dentry->d_op->d_real(dentry, inode, open_flags, flags);
+ return dentry->d_op->d_real(dentry, inode, flags);
else
return dentry;
}
@@ -597,7 +596,7 @@ static inline struct dentry *d_real(struct dentry *dentry,
static inline struct inode *d_real_inode(const struct dentry *dentry)
{
/* This usage of d_real() results in const dentry */
- return d_backing_inode(d_real((struct dentry *) dentry, NULL, 0, 0));
+ return d_backing_inode(d_real((struct dentry *) dentry, NULL, 0));
}

struct name_snapshot {
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 5e5dd484937f..5294697217b7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1244,7 +1244,7 @@ static inline struct inode *file_inode(const struct file *f)

static inline struct dentry *file_dentry(const struct file *file)
{
- return d_real(file->f_path.dentry, file_inode(file), 0, 0);
+ return d_real(file->f_path.dentry, file_inode(file), 0);
}

static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)
--
2.14.3