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Subject[PATCH 06/11] ovl: create helper ovl_create_temp()
Date
From: Amir Goldstein <amir73il@gmail.com>

Also used ovl_create_temp() in ovl_create_index() instead of calling
ovl_do_mkdir() directly, so now all callers of ovl_do_mkdir() are routed
through ovl_create_real(), which paves the way for Al's fix for non-hashed
result from vfs_mkdir().

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
fs/overlayfs/copy_up.c | 14 ++++----------
fs/overlayfs/dir.c | 13 +++++++++----
fs/overlayfs/overlayfs.h | 2 +-
3 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index d3e9c1eeb7a4..1b442c14c531 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -365,14 +365,10 @@ static int ovl_create_index(struct dentry *dentry, struct dentry *origin,
if (err)
return err;

- temp = ovl_lookup_temp(indexdir);
+ temp = ovl_create_temp(indexdir, OVL_CATTR(S_IFDIR | 0));
if (IS_ERR(temp))
goto temp_err;

- err = ovl_do_mkdir(dir, temp, S_IFDIR);
- if (err)
- goto out;
-
err = ovl_set_upper_fh(upper, temp);
if (err)
goto out_cleanup;
@@ -500,12 +496,10 @@ static int ovl_get_tmpfile(struct ovl_copy_up_ctx *c, struct dentry **tempp)
if (new_creds)
old_creds = override_creds(new_creds);

- if (c->tmpfile) {
+ if (c->tmpfile)
temp = ovl_do_tmpfile(c->workdir, c->stat.mode);
- } else {
- temp = ovl_create_real(d_inode(c->workdir),
- ovl_lookup_temp(c->workdir), &cattr);
- }
+ else
+ temp = ovl_create_temp(c->workdir, &cattr);
if (IS_ERR(temp))
goto temp_err;
err = 0;
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 425ddb098c4a..1b181292a624 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -43,7 +43,7 @@ int ovl_cleanup(struct inode *wdir, struct dentry *wdentry)
return err;
}

-struct dentry *ovl_lookup_temp(struct dentry *workdir)
+static struct dentry *ovl_lookup_temp(struct dentry *workdir)
{
struct dentry *temp;
char name[20];
@@ -169,6 +169,12 @@ struct dentry *ovl_create_real(struct inode *dir, struct dentry *newdentry,
return newdentry;
}

+struct dentry *ovl_create_temp(struct dentry *workdir, struct ovl_cattr *attr)
+{
+ return ovl_create_real(d_inode(workdir), ovl_lookup_temp(workdir),
+ attr);
+}
+
static int ovl_set_opaque_xerr(struct dentry *dentry, struct dentry *upper,
int xerr)
{
@@ -287,8 +293,7 @@ static struct dentry *ovl_clear_empty(struct dentry *dentry,
if (upper->d_parent->d_inode != udir)
goto out_unlock;

- opaquedir = ovl_create_real(wdir, ovl_lookup_temp(workdir),
- OVL_CATTR(stat.mode));
+ opaquedir = ovl_create_temp(workdir, OVL_CATTR(stat.mode));
err = PTR_ERR(opaquedir);
if (IS_ERR(opaquedir))
goto out_unlock;
@@ -388,7 +393,7 @@ static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode,
if (IS_ERR(upper))
goto out_unlock;

- newdentry = ovl_create_real(wdir, ovl_lookup_temp(workdir), cattr);
+ newdentry = ovl_create_temp(workdir, cattr);
err = PTR_ERR(newdentry);
if (IS_ERR(newdentry))
goto out_dput;
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 6bbde513e068..3f13d0965e03 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -346,7 +346,6 @@ static inline void ovl_copyattr(struct inode *from, struct inode *to)

/* dir.c */
extern const struct inode_operations ovl_dir_inode_operations;
-struct dentry *ovl_lookup_temp(struct dentry *workdir);
int ovl_cleanup_and_whiteout(struct dentry *workdir, struct inode *dir,
struct dentry *dentry);
struct ovl_cattr {
@@ -361,6 +360,7 @@ struct ovl_cattr {
struct dentry *ovl_create_real(struct inode *dir, struct dentry *newdentry,
struct ovl_cattr *attr);
int ovl_cleanup(struct inode *dir, struct dentry *dentry);
+struct dentry *ovl_create_temp(struct dentry *workdir, struct ovl_cattr *attr);

/* copy_up.c */
int ovl_copy_up(struct dentry *dentry);
--
2.14.3
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