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path: root/fs/overlayfs/dir.c
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Diffstat (limited to 'fs/overlayfs/dir.c')
-rw-r--r--fs/overlayfs/dir.c85
1 files changed, 45 insertions, 40 deletions
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 8bf800c5796a..6245016c4a08 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -23,15 +23,15 @@ MODULE_PARM_DESC(redirect_max,
static int ovl_set_redirect(struct dentry *dentry, bool samedir);
-int ovl_cleanup(struct inode *wdir, struct dentry *wdentry)
+int ovl_cleanup(struct ovl_fs *ofs, struct inode *wdir, struct dentry *wdentry)
{
int err;
dget(wdentry);
if (d_is_dir(wdentry))
- err = ovl_do_rmdir(wdir, wdentry);
+ err = ovl_do_rmdir(ofs, wdir, wdentry);
else
- err = ovl_do_unlink(wdir, wdentry);
+ err = ovl_do_unlink(ofs, wdir, wdentry);
dput(wdentry);
if (err) {
@@ -42,7 +42,7 @@ int ovl_cleanup(struct inode *wdir, struct dentry *wdentry)
return err;
}
-struct dentry *ovl_lookup_temp(struct dentry *workdir)
+struct dentry *ovl_lookup_temp(struct ovl_fs *ofs, struct dentry *workdir)
{
struct dentry *temp;
char name[20];
@@ -70,11 +70,11 @@ static struct dentry *ovl_whiteout(struct ovl_fs *ofs)
struct inode *wdir = workdir->d_inode;
if (!ofs->whiteout) {
- whiteout = ovl_lookup_temp(workdir);
+ whiteout = ovl_lookup_temp(ofs, workdir);
if (IS_ERR(whiteout))
goto out;
- err = ovl_do_whiteout(wdir, whiteout);
+ err = ovl_do_whiteout(ofs, wdir, whiteout);
if (err) {
dput(whiteout);
whiteout = ERR_PTR(err);
@@ -84,11 +84,11 @@ static struct dentry *ovl_whiteout(struct ovl_fs *ofs)
}
if (ofs->share_whiteout) {
- whiteout = ovl_lookup_temp(workdir);
+ whiteout = ovl_lookup_temp(ofs, workdir);
if (IS_ERR(whiteout))
goto out;
- err = ovl_do_link(ofs->whiteout, wdir, whiteout);
+ err = ovl_do_link(ofs, ofs->whiteout, wdir, whiteout);
if (!err)
goto out;
@@ -122,27 +122,28 @@ int ovl_cleanup_and_whiteout(struct ovl_fs *ofs, struct inode *dir,
if (d_is_dir(dentry))
flags = RENAME_EXCHANGE;
- err = ovl_do_rename(wdir, whiteout, dir, dentry, flags);
+ err = ovl_do_rename(ofs, wdir, whiteout, dir, dentry, flags);
if (err)
goto kill_whiteout;
if (flags)
- ovl_cleanup(wdir, dentry);
+ ovl_cleanup(ofs, wdir, dentry);
out:
dput(whiteout);
return err;
kill_whiteout:
- ovl_cleanup(wdir, whiteout);
+ ovl_cleanup(ofs, wdir, whiteout);
goto out;
}
-int ovl_mkdir_real(struct inode *dir, struct dentry **newdentry, umode_t mode)
+int ovl_mkdir_real(struct ovl_fs *ofs, struct inode *dir,
+ struct dentry **newdentry, umode_t mode)
{
int err;
struct dentry *d, *dentry = *newdentry;
- err = ovl_do_mkdir(dir, dentry, mode);
+ err = ovl_do_mkdir(ofs, dir, dentry, mode);
if (err)
return err;
@@ -167,8 +168,8 @@ int ovl_mkdir_real(struct inode *dir, struct dentry **newdentry, umode_t mode)
return 0;
}
-struct dentry *ovl_create_real(struct inode *dir, struct dentry *newdentry,
- struct ovl_cattr *attr)
+struct dentry *ovl_create_real(struct ovl_fs *ofs, struct inode *dir,
+ struct dentry *newdentry, struct ovl_cattr *attr)
{
int err;
@@ -180,28 +181,28 @@ struct dentry *ovl_create_real(struct inode *dir, struct dentry *newdentry,
goto out;
if (attr->hardlink) {
- err = ovl_do_link(attr->hardlink, dir, newdentry);
+ err = ovl_do_link(ofs, attr->hardlink, dir, newdentry);
} else {
switch (attr->mode & S_IFMT) {
case S_IFREG:
- err = ovl_do_create(dir, newdentry, attr->mode);
+ err = ovl_do_create(ofs, dir, newdentry, attr->mode);
break;
case S_IFDIR:
/* mkdir is special... */
- err = ovl_mkdir_real(dir, &newdentry, attr->mode);
+ err = ovl_mkdir_real(ofs, dir, &newdentry, attr->mode);
break;
case S_IFCHR:
case S_IFBLK:
case S_IFIFO:
case S_IFSOCK:
- err = ovl_do_mknod(dir, newdentry, attr->mode,
+ err = ovl_do_mknod(ofs, dir, newdentry, attr->mode,
attr->rdev);
break;
case S_IFLNK:
- err = ovl_do_symlink(dir, newdentry, attr->link);
+ err = ovl_do_symlink(ofs, dir, newdentry, attr->link);
break;
default:
@@ -223,10 +224,11 @@ out:
return newdentry;
}
-struct dentry *ovl_create_temp(struct dentry *workdir, struct ovl_cattr *attr)
+struct dentry *ovl_create_temp(struct ovl_fs *ofs, struct dentry *workdir,
+ struct ovl_cattr *attr)
{
- return ovl_create_real(d_inode(workdir), ovl_lookup_temp(workdir),
- attr);
+ return ovl_create_real(ofs, d_inode(workdir),
+ ovl_lookup_temp(ofs, workdir), attr);
}
static int ovl_set_opaque_xerr(struct dentry *dentry, struct dentry *upper,
@@ -330,7 +332,7 @@ static int ovl_create_upper(struct dentry *dentry, struct inode *inode,
attr->mode &= ~current_umask();
inode_lock_nested(udir, I_MUTEX_PARENT);
- newdentry = ovl_create_real(udir,
+ newdentry = ovl_create_real(ofs, udir,
lookup_one_len(dentry->d_name.name,
upperdir,
dentry->d_name.len),
@@ -353,7 +355,7 @@ out_unlock:
return err;
out_cleanup:
- ovl_cleanup(udir, newdentry);
+ ovl_cleanup(ofs, udir, newdentry);
dput(newdentry);
goto out_unlock;
}
@@ -361,6 +363,7 @@ out_cleanup:
static struct dentry *ovl_clear_empty(struct dentry *dentry,
struct list_head *list)
{
+ struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
struct dentry *workdir = ovl_workdir(dentry);
struct inode *wdir = workdir->d_inode;
struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent);
@@ -391,7 +394,7 @@ static struct dentry *ovl_clear_empty(struct dentry *dentry,
if (upper->d_parent->d_inode != udir)
goto out_unlock;
- opaquedir = ovl_create_temp(workdir, OVL_CATTR(stat.mode));
+ opaquedir = ovl_create_temp(ofs, workdir, OVL_CATTR(stat.mode));
err = PTR_ERR(opaquedir);
if (IS_ERR(opaquedir))
goto out_unlock;
@@ -410,12 +413,12 @@ static struct dentry *ovl_clear_empty(struct dentry *dentry,
if (err)
goto out_cleanup;
- err = ovl_do_rename(wdir, opaquedir, udir, upper, RENAME_EXCHANGE);
+ err = ovl_do_rename(ofs, wdir, opaquedir, udir, upper, RENAME_EXCHANGE);
if (err)
goto out_cleanup;
- ovl_cleanup_whiteouts(upper, list);
- ovl_cleanup(wdir, upper);
+ ovl_cleanup_whiteouts(ofs, upper, list);
+ ovl_cleanup(ofs, wdir, upper);
unlock_rename(workdir, upperdir);
/* dentry's upper doesn't match now, get rid of it */
@@ -424,7 +427,7 @@ static struct dentry *ovl_clear_empty(struct dentry *dentry,
return opaquedir;
out_cleanup:
- ovl_cleanup(wdir, opaquedir);
+ ovl_cleanup(ofs, wdir, opaquedir);
dput(opaquedir);
out_unlock:
unlock_rename(workdir, upperdir);
@@ -495,7 +498,7 @@ static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode,
if (d_is_negative(upper) || !IS_WHITEOUT(d_inode(upper)))
goto out_dput;
- newdentry = ovl_create_temp(workdir, cattr);
+ newdentry = ovl_create_temp(ofs, workdir, cattr);
err = PTR_ERR(newdentry);
if (IS_ERR(newdentry))
goto out_dput;
@@ -533,20 +536,20 @@ static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode,
if (err)
goto out_cleanup;
- err = ovl_do_rename(wdir, newdentry, udir, upper,
+ err = ovl_do_rename(ofs, wdir, newdentry, udir, upper,
RENAME_EXCHANGE);
if (err)
goto out_cleanup;
- ovl_cleanup(wdir, upper);
+ ovl_cleanup(ofs, wdir, upper);
} else {
- err = ovl_do_rename(wdir, newdentry, udir, upper, 0);
+ err = ovl_do_rename(ofs, wdir, newdentry, udir, upper, 0);
if (err)
goto out_cleanup;
}
err = ovl_instantiate(dentry, inode, newdentry, hardlink);
if (err) {
- ovl_cleanup(udir, newdentry);
+ ovl_cleanup(ofs, udir, newdentry);
dput(newdentry);
}
out_dput:
@@ -561,7 +564,7 @@ out:
return err;
out_cleanup:
- ovl_cleanup(wdir, newdentry);
+ ovl_cleanup(ofs, wdir, newdentry);
dput(newdentry);
goto out_dput;
}
@@ -801,6 +804,7 @@ out:
static int ovl_remove_upper(struct dentry *dentry, bool is_dir,
struct list_head *list)
{
+ struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent);
struct inode *dir = upperdir->d_inode;
struct dentry *upper;
@@ -827,9 +831,9 @@ static int ovl_remove_upper(struct dentry *dentry, bool is_dir,
goto out_dput_upper;
if (is_dir)
- err = vfs_rmdir(&init_user_ns, dir, upper);
+ err = ovl_do_rmdir(ofs, dir, upper);
else
- err = vfs_unlink(&init_user_ns, dir, upper, NULL);
+ err = ovl_do_unlink(ofs, dir, upper);
ovl_dir_modified(dentry->d_parent, ovl_type_origin(dentry));
/*
@@ -1096,6 +1100,7 @@ static int ovl_rename(struct user_namespace *mnt_userns, struct inode *olddir,
bool samedir = olddir == newdir;
struct dentry *opaquedir = NULL;
const struct cred *old_cred = NULL;
+ struct ovl_fs *ofs = OVL_FS(old->d_sb);
LIST_HEAD(list);
err = -EINVAL;
@@ -1252,13 +1257,13 @@ static int ovl_rename(struct user_namespace *mnt_userns, struct inode *olddir,
if (err)
goto out_dput;
- err = ovl_do_rename(old_upperdir->d_inode, olddentry,
+ err = ovl_do_rename(ofs, old_upperdir->d_inode, olddentry,
new_upperdir->d_inode, newdentry, flags);
if (err)
goto out_dput;
if (cleanup_whiteout)
- ovl_cleanup(old_upperdir->d_inode, newdentry);
+ ovl_cleanup(ofs, old_upperdir->d_inode, newdentry);
if (overwrite && d_inode(new)) {
if (new_is_dir)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 12:13:55 +0000