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[95.90.238.229]) by smtp.googlemail.com with ESMTPSA id t1sm855964eds.53.2021.04.06.04.50.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Apr 2021 04:50:58 -0700 (PDT) From: Gioh Kim To: linux-rdma@vger.kernel.org, linux-doc@vger.kernel.org Cc: bvanassche@acm.org, leon@kernel.org, dledford@redhat.com, jgg@ziepe.ca, haris.iqbal@ionos.com, jinpu.wang@ionos.com, akinobu.mita@gmail.com, corbet@lwn.net, Gioh Kim , Jack Wang Subject: [PATCH 1/4] RDMA/rtrs: Enable the fault-injection Date: Tue, 6 Apr 2021 13:50:46 +0200 Message-Id: <20210406115049.196527-2-gi-oh.kim@ionos.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210406115049.196527-1-gi-oh.kim@ionos.com> References: <20210406115049.196527-1-gi-oh.kim@ionos.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Gioh Kim This patch introduces some functions to enable the fault-injection for RTRS. * rtrs_fault_inject_init/final initialize the fault-injection and create a debugfs directory. * rtrs_fault_inject_add creates a debugfs entry to enable the fault-injection point. Signed-off-by: Gioh Kim Signed-off-by: Jack Wang --- drivers/infiniband/ulp/rtrs/Makefile | 2 + drivers/infiniband/ulp/rtrs/rtrs-fault.c | 52 ++++++++++++++++++++++++ drivers/infiniband/ulp/rtrs/rtrs-fault.h | 28 +++++++++++++ 3 files changed, 82 insertions(+) create mode 100644 drivers/infiniband/ulp/rtrs/rtrs-fault.c create mode 100644 drivers/infiniband/ulp/rtrs/rtrs-fault.h diff --git a/drivers/infiniband/ulp/rtrs/Makefile b/drivers/infiniband/ulp/rtrs/Makefile index 3898509be270..3490f66bb7f2 100644 --- a/drivers/infiniband/ulp/rtrs/Makefile +++ b/drivers/infiniband/ulp/rtrs/Makefile @@ -3,10 +3,12 @@ rtrs-client-y := rtrs-clt.o \ rtrs-clt-stats.o \ rtrs-clt-sysfs.o +rtrs-client-$(CONFIG_FAULT_INJECTION_DEBUG_FS) += rtrs-fault.o rtrs-server-y := rtrs-srv.o \ rtrs-srv-stats.o \ rtrs-srv-sysfs.o +rtrs-server-$(CONFIG_FAULT_INJECTION_DEBUG_FS) += rtrs-fault.o rtrs-core-y := rtrs.o diff --git a/drivers/infiniband/ulp/rtrs/rtrs-fault.c b/drivers/infiniband/ulp/rtrs/rtrs-fault.c new file mode 100644 index 000000000000..af475c814c29 --- /dev/null +++ b/drivers/infiniband/ulp/rtrs/rtrs-fault.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * RDMA Transport Layer + * + * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved. + * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved. + * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved. + */ + +#include "rtrs-fault.h" + +static DECLARE_FAULT_ATTR(fail_default_attr); + +void rtrs_fault_inject_init(struct rtrs_fault_inject *fj, + const char *dir_name, + u32 err_status) +{ + struct dentry *dir, *parent; + struct fault_attr *attr = &fj->attr; + + /* create debugfs directory and attribute */ + parent = debugfs_create_dir(dir_name, NULL); + if (!parent) { + pr_warn("%s: failed to create debugfs directory\n", dir_name); + return; + } + + *attr = fail_default_attr; + dir = fault_create_debugfs_attr("fault_inject", parent, attr); + if (IS_ERR(dir)) { + pr_warn("%s: failed to create debugfs attr\n", dir_name); + debugfs_remove_recursive(parent); + return; + } + fj->parent = parent; + fj->dir = dir; + + /* create debugfs for status code */ + fj->status = err_status; + debugfs_create_u32("status", 0600, dir, &fj->status); +} + +void rtrs_fault_inject_final(struct rtrs_fault_inject *fj) +{ + /* remove debugfs directories */ + debugfs_remove_recursive(fj->parent); +} + +void rtrs_fault_inject_add(struct dentry *dir, const char *fname, bool *value) +{ + debugfs_create_bool(fname, 0600, dir, value); +} diff --git a/drivers/infiniband/ulp/rtrs/rtrs-fault.h b/drivers/infiniband/ulp/rtrs/rtrs-fault.h new file mode 100644 index 000000000000..8c1acffb2b16 --- /dev/null +++ b/drivers/infiniband/ulp/rtrs/rtrs-fault.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * RDMA Transport Layer + * + * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved. + * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved. + * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved. + */ + +#ifndef RTRS_FAULT_H +#define RTRS_FAULT_H + +#include + +struct rtrs_fault_inject { +#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS + struct fault_attr attr; + struct dentry *parent; + struct dentry *dir; + u32 status; +#endif +}; + +void rtrs_fault_inject_init(struct rtrs_fault_inject *fj, + const char *dev_name, u32 err_status); +void rtrs_fault_inject_add(struct dentry *dir, const char *fname, bool *value); +void rtrs_fault_inject_final(struct rtrs_fault_inject *fj); +#endif /* RTRS_FAULT_H */