return error;
}
-static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
- struct file *f,
- int (*open)(struct inode *, struct file *),
- const struct cred *cred)
+int open_check_o_direct(struct file *f)
+{
+ /* NB: we're sure to have correct a_ops only after f_op->open */
+ if (f->f_flags & O_DIRECT) {
+ if (!f->f_mapping->a_ops ||
+ ((!f->f_mapping->a_ops->direct_IO) &&
+ (!f->f_mapping->a_ops->get_xip_mem))) {
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+static struct file *do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
+ struct file *f,
+ int (*open)(struct inode *, struct file *),
+ const struct cred *cred)
{
static const struct file_operations empty_fops = {};
struct inode *inode;
file_ra_state_init(&f->f_ra, f->f_mapping->host->i_mapping);
- /* NB: we're sure to have correct a_ops only after f_op->open */
- if (f->f_flags & O_DIRECT) {
- if (!f->f_mapping->a_ops ||
- ((!f->f_mapping->a_ops->direct_IO) &&
- (!f->f_mapping->a_ops->get_xip_mem))) {
- fput(f);
- f = ERR_PTR(-EINVAL);
- }
- }
-
return f;
cleanup_all:
f->f_path.dentry = NULL;
f->f_path.mnt = NULL;
cleanup_file:
- put_filp(f);
dput(dentry);
mntput(mnt);
return ERR_PTR(error);
}
+static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
+ struct file *f,
+ int (*open)(struct inode *, struct file *),
+ const struct cred *cred)
+{
+ struct file *res = do_dentry_open(dentry, mnt, f, open, cred);
+ if (!IS_ERR(res)) {
+ int error = open_check_o_direct(f);
+ if (error) {
+ fput(res);
+ res = ERR_PTR(error);
+ }
+ } else {
+ put_filp(f);
+ }
+ return res;
+}
+
/**
* lookup_instantiate_filp - instantiates the open intent filp
* @nd: pointer to nameidata
/* Has the filesystem initialised the file for us? */
if (filp->f_path.dentry == NULL) {
+ struct file *res;
+
path_get(&nd->path);
- filp = __dentry_open(nd->path.dentry, nd->path.mnt, filp,
- NULL, cred);
+ res = do_dentry_open(nd->path.dentry, nd->path.mnt,
+ filp, NULL, cred);
+ if (!IS_ERR(res)) {
+ int error;
+
+ BUG_ON(res != filp);
+
+ error = open_check_o_direct(filp);
+ if (error) {
+ fput(filp);
+ filp = ERR_PTR(error);
+ }
+ } else {
+ put_filp(filp);
+ filp = res;
+ }
}
return filp;
}