/* Calls cr_mknod and then opens with the given flags, returning a (struct file *) */
struct file *
cr_filp_mknod(cr_errbuf_t *eb, const char *name, int mode, int flags, unsigned long unlinked_id) {
struct nameidata nd;
struct dentry * dentry;
struct file *filp;
/* mknod */
dentry = cr_mknod(eb, &nd, name, mode, unlinked_id);
if (IS_ERR(dentry)) {
CR_KTRACE_UNEXPECTED("Failed to recreate %sfilesystem object %s, err=%d.",
unlinked_id?"unlinked ":"", name, (int)PTR_ERR(dentry));
filp = (struct file *)dentry;
goto out;
}
/* now open it */
filp = cr_dentry_open(dget(dentry), mntget(nd.nd_mnt), flags);
if (IS_ERR(filp)) {
CR_ERR_EB(eb, "Failed to reopen %sfilesystem object %s, err=%d.",
unlinked_id?"unlinked ":"", name, (int)PTR_ERR(dentry));
goto out_dput;
}
/* check that we actually got the expected type */
if ((mode ^ filp->f_dentry->d_inode->i_mode) & S_IFMT) {
CR_ERR_EB(eb, "Type conflict when recreating %sfilesystem object %s.",
unlinked_id?"unlinked ":"", name);
fput(filp);
filp = ERR_PTR(-EEXIST);
goto out_dput;
}
out_dput:
dput(dentry);
cr_path_release(&nd);
out:
return filp;
}
/* Calls cr_mknod and then opens with the given flags, returning a (struct file *) */
struct file *
cr_filp_mknod(cr_errbuf_t *eb, const char *name, int mode, int flags, unsigned long unlinked_id) {
struct path path;
struct file *filp;
int err;
/* mknod */
err = cr_mknod(eb, &path, name, mode, unlinked_id);
if (err) {
CR_KTRACE_UNEXPECTED("Failed to recreate %sfilesystem object %s, err=%d.",
unlinked_id?"unlinked ":"", name, err);
filp = (struct file *)ERR_PTR(err);
goto out;
}
/* now open it */
path_get(&path);
filp = cr_dentry_open_perm(&path, flags);
if (IS_ERR(filp)) {
CR_ERR_EB(eb, "Failed to reopen %sfilesystem object %s, err=%d.",
unlinked_id?"unlinked ":"", name, (int)PTR_ERR(filp));
goto out_put;
}
/* check that we actually got the expected type */
if ((mode ^ filp->f_dentry->d_inode->i_mode) & S_IFMT) {
CR_ERR_EB(eb, "Type conflict when recreating %sfilesystem object %s.",
unlinked_id?"unlinked ":"", name);
fput(filp);
filp = ERR_PTR(-EEXIST);
}
out_put:
path_put(&path);
out:
return filp;
}
