/* * Copyright(c) 2016 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * BSD LICENSE * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * - Neither the name of Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #ifndef IB_HDRS_H #define IB_HDRS_H #include #include #include #define IB_SEQ_NAK (3 << 29) /* AETH NAK opcode values */ #define IB_RNR_NAK 0x20 #define IB_NAK_PSN_ERROR 0x60 #define IB_NAK_INVALID_REQUEST 0x61 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63 #define IB_NAK_INVALID_RD_REQUEST 0x64 #define IB_BTH_REQ_ACK BIT(31) #define IB_BTH_SOLICITED BIT(23) #define IB_BTH_MIG_REQ BIT(22) #define IB_GRH_VERSION 6 #define IB_GRH_VERSION_MASK 0xF #define IB_GRH_VERSION_SHIFT 28 #define IB_GRH_TCLASS_MASK 0xFF #define IB_GRH_TCLASS_SHIFT 20 #define IB_GRH_FLOW_MASK 0xFFFFF #define IB_GRH_FLOW_SHIFT 0 #define IB_GRH_NEXT_HDR 0x1B struct ib_reth { __be64 vaddr; /* potentially unaligned */ __be32 rkey; __be32 length; } __packed; struct ib_atomic_eth { __be64 vaddr; /* potentially unaligned */ __be32 rkey; __be64 swap_data; /* potentially unaligned */ __be64 compare_data; /* potentially unaligned */ } __packed; union ib_ehdrs { struct { __be32 deth[2]; __be32 imm_data; } ud; struct { struct ib_reth reth; __be32 imm_data; } rc; struct { __be32 aeth; __be64 atomic_ack_eth; /* potentially unaligned */ } __packed at; __be32 imm_data; __be32 aeth; __be32 ieth; struct ib_atomic_eth atomic_eth; } __packed; struct ib_other_headers { __be32 bth[3]; union ib_ehdrs u; } __packed; struct ib_header { __be16 lrh[4]; union { struct { struct ib_grh grh; struct ib_other_headers oth; } l; struct ib_other_headers oth; } u; } __packed; /* accessors for unaligned __be64 items */ static inline u64 ib_u64_get(__be64 *p) { return get_unaligned_be64(p); } static inline void ib_u64_put(u64 val, __be64 *p) { put_unaligned_be64(val, p); } static inline u64 get_ib_reth_vaddr(struct ib_reth *reth) { return ib_u64_get(&reth->vaddr); } static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth) { ib_u64_put(val, &reth->vaddr); } static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth) { return ib_u64_get(&ateth->vaddr); } static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth) { ib_u64_put(val, &ateth->vaddr); } static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth) { return ib_u64_get(&ateth->swap_data); } static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth) { ib_u64_put(val, &ateth->swap_data); } static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth) { return ib_u64_get(&ateth->compare_data); } static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth) { ib_u64_put(val, &ateth->compare_data); } #endif /* IB_HDRS_H */ :28 -0500 commit07cd12945551b63ecb1a349d50a6d69d1d6feb4a (patch) tree75f65eba7eac9277971082a2d5a4cf1370562c0c /tools/testing/selftests/drivers parent7ce7d89f48834cefece7804d38fc5d85382edf77 (diff)
cgroup: don't online subsystems before cgroup_name/path() are operational
While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems before the new cgroup is associated with it kernfs_node. This is fine for cgroup proper but cgroup_name/path() depend on the associated kernfs_node and if a subsystem makes the new cgroup_subsys_state visible, which they're allowed to after onlining, it can lead to NULL dereference. The current code performs cgroup creation and subsystem onlining in cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems visible afterwards. There's no reason to online the subsystems early and we can simply drop cgroup_apply_control_enable() call from cgroup_create() so that the subsystems are onlined and made visible at the same time. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") Cc: stable@vger.kernel.org # v4.6+
Diffstat (limited to 'tools/testing/selftests/drivers')