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ovl: create helper ovl_create_temp()

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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>
This commit is contained in:
Amir Goldstein 2018-05-16 17:51:25 +03:00 committed by Miklos Szeredi
parent 95a1c8153a
commit 137ec526a2
3 changed files with 14 additions and 15 deletions
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14
fs/overlayfs/copy_up.c
View File

@ -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;

13
fs/overlayfs/dir.c
View File

@ -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 @@ out:
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;

2
fs/overlayfs/overlayfs.h
View File

@ -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);