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Tue, 29 Nov 2022 23:25:11 +0000 (GMT) From: gjoyce@linux.vnet.ibm.com To: linux-block@vger.kernel.org Subject: [PATCH v3 2/3] block: sed-opal: Implement IOC_OPAL_REVERT_LSP Date: Tue, 29 Nov 2022 17:25:05 -0600 Message-Id: <20221129232506.3735672-3-gjoyce@linux.vnet.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221129232506.3735672-1-gjoyce@linux.vnet.ibm.com> References: <20221129232506.3735672-1-gjoyce@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: xTXBCZ20C_Kr95DuzpT995d0ob1JWQh1 X-Proofpoint-GUID: xTXBCZ20C_Kr95DuzpT995d0ob1JWQh1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-29_13,2022-11-29_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 lowpriorityscore=0 bulkscore=0 malwarescore=0 clxscore=1015 mlxscore=0 phishscore=0 impostorscore=0 spamscore=0 priorityscore=1501 adultscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211290138 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: axboe@kernel.dk, gjoyce@linux.vnet.ibm.com, nayna@linux.ibm.com, keyrings@vger.kernel.org, jonathan.derrick@linux.dev, brking@linux.vnet.ibm.com, akpm@linux-foundation.org, msuchanek@suse.de, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Greg Joyce This is used in conjunction with IOC_OPAL_REVERT_TPR to return a drive to Original Factory State without erasing the data. If IOC_OPAL_REVERT_LSP is called with opal_revert_lsp.options bit OPAL_PRESERVE set prior to calling IOC_OPAL_REVERT_TPR, the drive global locking range will not be erased. Signed-off-by: Greg Joyce Reviewed-by: Christoph Hellwig Reviewed-by: Jonathan Derrick Reviewed-by: Hannes Reinecke --- block/opal_proto.h | 4 ++++ block/sed-opal.c | 40 +++++++++++++++++++++++++++++++++++ include/linux/sed-opal.h | 1 + include/uapi/linux/sed-opal.h | 11 ++++++++++ 4 files changed, 56 insertions(+) diff --git a/block/opal_proto.h b/block/opal_proto.h index 7152aa1f1a49..c3b5bff0b9e4 100644 --- a/block/opal_proto.h +++ b/block/opal_proto.h @@ -215,6 +215,10 @@ enum opal_parameter { OPAL_SUM_SET_LIST = 0x060000, }; +enum opal_revertlsp { + OPAL_KEEP_GLOBAL_RANGE_KEY = 0x060000, +}; + /* Packets derived from: * TCG_Storage_Architecture_Core_Spec_v2.01_r1.00 * Secion: 3.2.3 ComPackets, Packets & Subpackets diff --git a/block/sed-opal.c b/block/sed-opal.c index 0e65ac0cd69e..993b2b7cc4c2 100644 --- a/block/sed-opal.c +++ b/block/sed-opal.c @@ -1632,6 +1632,26 @@ static int internal_activate_user(struct opal_dev *dev, void *data) return finalize_and_send(dev, parse_and_check_status); } +static int revert_lsp(struct opal_dev *dev, void *data) +{ + struct opal_revert_lsp *rev = data; + int err; + + err = cmd_start(dev, opaluid[OPAL_THISSP_UID], + opalmethod[OPAL_REVERTSP]); + add_token_u8(&err, dev, OPAL_STARTNAME); + add_token_u64(&err, dev, OPAL_KEEP_GLOBAL_RANGE_KEY); + add_token_u8(&err, dev, (rev->options & OPAL_PRESERVE) ? + OPAL_TRUE : OPAL_FALSE); + add_token_u8(&err, dev, OPAL_ENDNAME); + if (err) { + pr_debug("Error building REVERT SP command.\n"); + return err; + } + + return finalize_and_send(dev, parse_and_check_status); +} + static int erase_locking_range(struct opal_dev *dev, void *data) { struct opal_session_info *session = data; @@ -2273,6 +2293,23 @@ static int opal_get_discv(struct opal_dev *dev, struct opal_discovery *discv) return discv->size; /* modified to actual length of data */ } +static int opal_revertlsp(struct opal_dev *dev, struct opal_revert_lsp *rev) +{ + /* controller will terminate session */ + const struct opal_step steps[] = { + { start_admin1LSP_opal_session, &rev->key }, + { revert_lsp, rev } + }; + int ret; + + mutex_lock(&dev->dev_lock); + setup_opal_dev(dev); + ret = execute_steps(dev, steps, ARRAY_SIZE(steps)); + mutex_unlock(&dev->dev_lock); + + return ret; +} + static int opal_erase_locking_range(struct opal_dev *dev, struct opal_session_info *opal_session) { @@ -2801,6 +2838,9 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg) case IOC_OPAL_GET_STATUS: ret = opal_get_status(dev, arg); break; + case IOC_OPAL_REVERT_LSP: + ret = opal_revertlsp(dev, p); + break; case IOC_OPAL_DISCOVERY: ret = opal_get_discv(dev, p); break; diff --git a/include/linux/sed-opal.h b/include/linux/sed-opal.h index ef62e9292b27..7131d7f0eec2 100644 --- a/include/linux/sed-opal.h +++ b/include/linux/sed-opal.h @@ -45,6 +45,7 @@ static inline bool is_sed_ioctl(unsigned int cmd) case IOC_OPAL_GENERIC_TABLE_RW: case IOC_OPAL_GET_STATUS: case IOC_OPAL_DISCOVERY: + case IOC_OPAL_REVERT_LSP: return true; } return false; diff --git a/include/uapi/linux/sed-opal.h b/include/uapi/linux/sed-opal.h index fb6f7fa1e3fd..fccde168e90c 100644 --- a/include/uapi/linux/sed-opal.h +++ b/include/uapi/linux/sed-opal.h @@ -51,6 +51,10 @@ struct opal_key { __u8 key[OPAL_KEY_MAX]; }; +enum opal_revert_lsp_opts { + OPAL_PRESERVE = 0x01, +}; + struct opal_lr_act { struct opal_key key; __u32 sum; @@ -149,6 +153,12 @@ struct opal_discovery { __u64 size; }; +struct opal_revert_lsp { + struct opal_key key; + __u32 options; + __u32 __pad; +}; + #define IOC_OPAL_SAVE _IOW('p', 220, struct opal_lock_unlock) #define IOC_OPAL_LOCK_UNLOCK _IOW('p', 221, struct opal_lock_unlock) #define IOC_OPAL_TAKE_OWNERSHIP _IOW('p', 222, struct opal_key) @@ -167,5 +177,6 @@ struct opal_discovery { #define IOC_OPAL_GENERIC_TABLE_RW _IOW('p', 235, struct opal_read_write_table) #define IOC_OPAL_GET_STATUS _IOR('p', 236, struct opal_status) #define IOC_OPAL_DISCOVERY _IOW('p', 237, struct opal_discovery) +#define IOC_OPAL_REVERT_LSP _IOW('p', 238, struct opal_revert_lsp) #endif /* _UAPI_SED_OPAL_H */