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Subject[patch 07/10] vfs: add path_rename()
From: Miklos Szeredi <mszeredi@suse.cz>

Introduce path_rename(). Make vfs_rename() static.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
---
fs/ecryptfs/inode.c | 13 +++++++------
fs/namei.c | 27 +++++++++++++++++++--------
fs/nfsd/vfs.c | 17 +++++------------
include/linux/fs.h | 2 +-
4 files changed, 32 insertions(+), 27 deletions(-)
Index: vfs-2.6/fs/ecryptfs/inode.c
===================================================================
--- vfs-2.6.orig/fs/ecryptfs/inode.c 2008-04-02 21:36:43.000000000 +0200
+++ vfs-2.6/fs/ecryptfs/inode.c 2008-04-02 21:37:52.000000000 +0200
@@ -559,25 +559,26 @@ ecryptfs_rename(struct inode *old_dir, s
int rc;
struct dentry *lower_old_dentry;
struct dentry *lower_new_dentry;
- struct dentry *lower_old_dir_dentry;
+ struct path lower_old_dir;
struct dentry *lower_new_dir_dentry;

lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
dget(lower_old_dentry);
dget(lower_new_dentry);
- lower_old_dir_dentry = dget_parent(lower_old_dentry);
+ lower_old_dir.mnt = ecryptfs_dentry_to_lower_mnt(old_dentry);
+ lower_old_dir.dentry = dget_parent(lower_old_dentry);
lower_new_dir_dentry = dget_parent(lower_new_dentry);
- lock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
- rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry,
+ lock_rename(lower_old_dir.dentry, lower_new_dir_dentry);
+ rc = path_rename(&lower_old_dir, lower_old_dentry,
lower_new_dir_dentry->d_inode, lower_new_dentry);
if (rc)
goto out_lock;
fsstack_copy_attr_all(new_dir, lower_new_dir_dentry->d_inode, NULL);
if (new_dir != old_dir)
- fsstack_copy_attr_all(old_dir, lower_old_dir_dentry->d_inode, NULL);
+ fsstack_copy_attr_all(old_dir, lower_old_dir.dentry->d_inode, NULL);
out_lock:
- unlock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
+ unlock_rename(lower_old_dir.dentry, lower_new_dir_dentry);
dput(lower_new_dentry->d_parent);
dput(lower_old_dentry->d_parent);
dput(lower_new_dentry);
Index: vfs-2.6/fs/namei.c
===================================================================
--- vfs-2.6.orig/fs/namei.c 2008-04-02 21:36:43.000000000 +0200
+++ vfs-2.6/fs/namei.c 2008-04-02 21:38:45.000000000 +0200
@@ -2723,8 +2723,8 @@ static int vfs_rename_other(struct inode
return error;
}

-int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry)
+static int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
{
int error;
int is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
@@ -2766,6 +2766,22 @@ int vfs_rename(struct inode *old_dir, st
return error;
}

+int path_rename(struct path *old_dir_path, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ int error = mnt_want_write(old_dir_path->mnt);
+
+ if (!error) {
+ struct inode *old_dir = old_dir_path->dentry->d_inode;
+
+ error = vfs_rename(old_dir, old_dentry, new_dir, new_dentry);
+ mnt_drop_write(old_dir_path->mnt);
+ }
+
+ return error;
+}
+EXPORT_SYMBOL(path_rename);
+
static int do_rename(int olddfd, const char *oldname,
int newdfd, const char *newname)
{
@@ -2827,12 +2843,8 @@ static int do_rename(int olddfd, const c
if (new_dentry == trap)
goto exit5;

- error = mnt_want_write(oldnd.path.mnt);
- if (error)
- goto exit5;
- error = vfs_rename(old_dir->d_inode, old_dentry,
+ error = path_rename(&oldnd.path, old_dentry,
new_dir->d_inode, new_dentry);
- mnt_drop_write(oldnd.path.mnt);
exit5:
dput(new_dentry);
exit4:
@@ -3023,7 +3035,6 @@ EXPORT_SYMBOL(unlock_rename);
EXPORT_SYMBOL(vfs_follow_link);
EXPORT_SYMBOL(generic_permission);
EXPORT_SYMBOL(vfs_readlink);
-EXPORT_SYMBOL(vfs_rename);
EXPORT_SYMBOL(vfs_rmdir);
EXPORT_SYMBOL(dentry_unhash);
EXPORT_SYMBOL(generic_readlink);
Index: vfs-2.6/fs/nfsd/vfs.c
===================================================================
--- vfs-2.6.orig/fs/nfsd/vfs.c 2008-04-02 21:36:43.000000000 +0200
+++ vfs-2.6/fs/nfsd/vfs.c 2008-04-02 21:37:52.000000000 +0200
@@ -1633,8 +1633,9 @@ __be32
nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
struct svc_fh *tfhp, char *tname, int tlen)
{
+ struct path old_dir_path;
struct dentry *fdentry, *tdentry, *odentry, *ndentry, *trap;
- struct inode *fdir, *tdir;
+ struct inode *tdir;
__be32 err;
int host_err;

@@ -1646,7 +1647,6 @@ nfsd_rename(struct svc_rqst *rqstp, stru
goto out;

fdentry = ffhp->fh_dentry;
- fdir = fdentry->d_inode;

tdentry = tfhp->fh_dentry;
tdir = tdentry->d_inode;
@@ -1693,22 +1693,15 @@ nfsd_rename(struct svc_rqst *rqstp, stru
goto out_dput_new;
}

- host_err = -EXDEV;
- if (ffhp->fh_export->ex_path.mnt != tfhp->fh_export->ex_path.mnt)
- goto out_dput_new;
- host_err = mnt_want_write(ffhp->fh_export->ex_path.mnt);
- if (host_err)
- goto out_dput_new;
-
- host_err = vfs_rename(fdir, odentry, tdir, ndentry);
+ old_dir_path.mnt = ffhp->fh_export->ex_path.mnt;
+ old_dir_path.dentry = fdentry;
+ host_err = path_rename(&old_dir_path, odentry, tdir, ndentry);
if (!host_err && EX_ISSYNC(tfhp->fh_export)) {
host_err = nfsd_sync_dir(tdentry);
if (!host_err)
host_err = nfsd_sync_dir(fdentry);
}

- mnt_drop_write(ffhp->fh_export->ex_path.mnt);
-
out_dput_new:
dput(ndentry);
out_dput_old:
Index: vfs-2.6/include/linux/fs.h
===================================================================
--- vfs-2.6.orig/include/linux/fs.h 2008-04-02 21:36:43.000000000 +0200
+++ vfs-2.6/include/linux/fs.h 2008-04-02 21:37:52.000000000 +0200
@@ -1132,7 +1132,7 @@ extern int path_link(struct dentry *, st
extern int vfs_rmdir(struct inode *, struct dentry *);
extern int path_rmdir(struct path *, struct dentry *);
extern int path_unlink(struct path *, struct dentry *);
-extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
+extern int path_rename(struct path *, struct dentry *, struct inode *, struct dentry *);

/*
* VFS dentry helper functions.
--


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