diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_fsf.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index c3aa0546364a..068cb94beb58 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -664,6 +664,76 @@ static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req) } } +/* + * Mapping of FC Endpoint Security flag masks to mnemonics + */ +static const struct { + u32 mask; + char *name; +} zfcp_fsf_fc_security_mnemonics[] = { + { FSF_FC_SECURITY_AUTH, "Authentication" }, + { FSF_FC_SECURITY_ENC_FCSP2 | + FSF_FC_SECURITY_ENC_ERAS, "Encryption" }, +}; + +/** + * zfcp_fsf_scnprint_fc_security() - translate FC Endpoint Security flags into + * mnemonics and place in a buffer + * @buf : the buffer to place the translated FC Endpoint Security flag(s) + * into + * @size : the size of the buffer, including the trailing null space + * @fc_security: one or more FC Endpoint Security flags, or zero + * @fmt : specifies whether a list or a single item is to be put into the + * buffer + * + * The Fibre Channel (FC) Endpoint Security flags are translated into mnemonics. + * If the FC Endpoint Security flags are zero "none" is placed into the buffer. + * + * With ZFCP_FSF_PRINT_FMT_LIST the mnemonics are placed as a list separated by + * a comma followed by a space into the buffer. If one or more FC Endpoint + * Security flags cannot be translated into a mnemonic, as they are undefined + * in zfcp_fsf_fc_security_mnemonics, their bitwise ORed value in hexadecimal + * representation is placed into the buffer. + * + * With ZFCP_FSF_PRINT_FMT_SINGLEITEM only one single mnemonic is placed into + * the buffer. If the FC Endpoint Security flag cannot be translated, as it is + * undefined in zfcp_fsf_fc_security_mnemonics, its value in hexadecimal + * representation is placed into the buffer. If more than one FC Endpoint + * Security flag was specified, their value in hexadecimal representation is + * placed into the buffer. + * + * Return: The number of characters written into buf not including the trailing + * '\0'. If size is == 0 the function returns 0. + */ +ssize_t zfcp_fsf_scnprint_fc_security(char *buf, size_t size, u32 fc_security, + enum zfcp_fsf_print_fmt fmt) +{ + const char *prefix = ""; + ssize_t len = 0; + int i; + + if (fc_security == 0) + return scnprintf(buf, size, "none"); + if (fmt == ZFCP_FSF_PRINT_FMT_SINGLEITEM && hweight32(fc_security) != 1) + return scnprintf(buf, size, "0x%08x", fc_security); + + for (i = 0; i < ARRAY_SIZE(zfcp_fsf_fc_security_mnemonics); i++) { + if (!(fc_security & zfcp_fsf_fc_security_mnemonics[i].mask)) + continue; + + len += scnprintf(buf + len, size - len, "%s%s", prefix, + zfcp_fsf_fc_security_mnemonics[i].name); + prefix = ", "; + fc_security &= ~zfcp_fsf_fc_security_mnemonics[i].mask; + } + + if (fc_security != 0) + len += scnprintf(buf + len, size - len, "%s0x%08x", + prefix, fc_security); + + return len; +} + static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req) { struct zfcp_adapter *adapter = req->adapter; @@ -681,6 +751,11 @@ static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req) FC_FC4_LIST_SIZE); memcpy(fc_host_active_fc4s(shost), bottom->active_fc4_types, FC_FC4_LIST_SIZE); + if (adapter->adapter_features & FSF_FEATURE_FC_SECURITY) + adapter->fc_security_algorithms = + bottom->fc_security_algorithms; + else + adapter->fc_security_algorithms = 0; } static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req) @@ -1533,6 +1608,10 @@ static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req) break; case FSF_GOOD: port->handle = header->port_handle; + if (adapter->adapter_features & FSF_FEATURE_FC_SECURITY) + port->connection_info = bottom->connection_info; + else + port->connection_info = 0; atomic_or(ZFCP_STATUS_COMMON_OPEN | ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_BOXED, |