diff options
Diffstat (limited to 'drivers/target/target_core_fabric_lib.c')
| -rw-r--r-- | drivers/target/target_core_fabric_lib.c | 283 |
1 files changed, 134 insertions, 149 deletions
diff --git a/drivers/target/target_core_fabric_lib.c b/drivers/target/target_core_fabric_lib.c index 41f4f270f919..cb6497ce4b61 100644 --- a/drivers/target/target_core_fabric_lib.c +++ b/drivers/target/target_core_fabric_lib.c @@ -24,6 +24,11 @@ * ******************************************************************************/ +/* + * See SPC4, section 7.5 "Protocol specific parameters" for details + * on the formats implemented in this file. + */ + #include <linux/kernel.h> #include <linux/string.h> #include <linux/ctype.h> @@ -34,124 +39,30 @@ #include <target/target_core_base.h> #include <target/target_core_fabric.h> -#include <target/target_core_configfs.h> #include "target_core_internal.h" #include "target_core_pr.h" -/* - * Handlers for Serial Attached SCSI (SAS) - */ -u8 sas_get_fabric_proto_ident(struct se_portal_group *se_tpg) -{ - /* - * Return a SAS Serial SCSI Protocol identifier for loopback operations - * This is defined in section 7.5.1 Table 362 in spc4r17 - */ - return 0x6; -} -EXPORT_SYMBOL(sas_get_fabric_proto_ident); -u32 sas_get_pr_transport_id( - struct se_portal_group *se_tpg, - struct se_node_acl *se_nacl, - struct t10_pr_registration *pr_reg, +static int sas_get_pr_transport_id( + struct se_node_acl *nacl, int *format_code, unsigned char *buf) { - unsigned char *ptr; int ret; - /* - * Set PROTOCOL IDENTIFIER to 6h for SAS - */ - buf[0] = 0x06; - /* - * From spc4r17, 7.5.4.7 TransportID for initiator ports using SCSI - * over SAS Serial SCSI Protocol - */ - ptr = &se_nacl->initiatorname[4]; /* Skip over 'naa. prefix */ - - ret = hex2bin(&buf[4], ptr, 8); - if (ret < 0) - pr_debug("sas transport_id: invalid hex string\n"); - - /* - * The SAS Transport ID is a hardcoded 24-byte length - */ - return 24; -} -EXPORT_SYMBOL(sas_get_pr_transport_id); - -u32 sas_get_pr_transport_id_len( - struct se_portal_group *se_tpg, - struct se_node_acl *se_nacl, - struct t10_pr_registration *pr_reg, - int *format_code) -{ - *format_code = 0; - /* - * From spc4r17, 7.5.4.7 TransportID for initiator ports using SCSI - * over SAS Serial SCSI Protocol - * - * The SAS Transport ID is a hardcoded 24-byte length - */ - return 24; -} -EXPORT_SYMBOL(sas_get_pr_transport_id_len); - -/* - * Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above - * Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations. - */ -char *sas_parse_pr_out_transport_id( - struct se_portal_group *se_tpg, - const char *buf, - u32 *out_tid_len, - char **port_nexus_ptr) -{ - /* - * Assume the FORMAT CODE 00b from spc4r17, 7.5.4.7 TransportID - * for initiator ports using SCSI over SAS Serial SCSI Protocol - * - * The TransportID for a SAS Initiator Port is of fixed size of - * 24 bytes, and SAS does not contain a I_T nexus identifier, - * so we return the **port_nexus_ptr set to NULL. - */ - *port_nexus_ptr = NULL; - *out_tid_len = 24; - - return (char *)&buf[4]; -} -EXPORT_SYMBOL(sas_parse_pr_out_transport_id); - -/* - * Handlers for Fibre Channel Protocol (FCP) - */ -u8 fc_get_fabric_proto_ident(struct se_portal_group *se_tpg) -{ - return 0x0; /* 0 = fcp-2 per SPC4 section 7.5.1 */ -} -EXPORT_SYMBOL(fc_get_fabric_proto_ident); + /* Skip over 'naa. prefix */ + ret = hex2bin(&buf[4], &nacl->initiatorname[4], 8); + if (ret) { + pr_debug("%s: invalid hex string\n", __func__); + return ret; + } -u32 fc_get_pr_transport_id_len( - struct se_portal_group *se_tpg, - struct se_node_acl *se_nacl, - struct t10_pr_registration *pr_reg, - int *format_code) -{ - *format_code = 0; - /* - * The FC Transport ID is a hardcoded 24-byte length - */ return 24; } -EXPORT_SYMBOL(fc_get_pr_transport_id_len); -u32 fc_get_pr_transport_id( - struct se_portal_group *se_tpg, +static int fc_get_pr_transport_id( struct se_node_acl *se_nacl, - struct t10_pr_registration *pr_reg, int *format_code, unsigned char *buf) { @@ -160,24 +71,20 @@ u32 fc_get_pr_transport_id( u32 off = 8; /* - * PROTOCOL IDENTIFIER is 0h for FCP-2 - * - * From spc4r17, 7.5.4.2 TransportID for initiator ports using - * SCSI over Fibre Channel - * * We convert the ASCII formatted N Port name into a binary * encoded TransportID. */ ptr = &se_nacl->initiatorname[0]; - for (i = 0; i < 24; ) { if (!strncmp(&ptr[i], ":", 1)) { i++; continue; } ret = hex2bin(&buf[off++], &ptr[i], 1); - if (ret < 0) - pr_debug("fc transport_id: invalid hex string\n"); + if (ret < 0) { + pr_debug("%s: invalid hex string\n", __func__); + return ret; + } i += 2; } /* @@ -185,42 +92,52 @@ u32 fc_get_pr_transport_id( */ return 24; } -EXPORT_SYMBOL(fc_get_pr_transport_id); -char *fc_parse_pr_out_transport_id( - struct se_portal_group *se_tpg, - const char *buf, - u32 *out_tid_len, - char **port_nexus_ptr) +static int sbp_get_pr_transport_id( + struct se_node_acl *nacl, + int *format_code, + unsigned char *buf) { - /* - * The TransportID for a FC N Port is of fixed size of - * 24 bytes, and FC does not contain a I_T nexus identifier, - * so we return the **port_nexus_ptr set to NULL. - */ - *port_nexus_ptr = NULL; - *out_tid_len = 24; + int ret; - return (char *)&buf[8]; -} -EXPORT_SYMBOL(fc_parse_pr_out_transport_id); + ret = hex2bin(&buf[8], nacl->initiatorname, 8); + if (ret) { + pr_debug("%s: invalid hex string\n", __func__); + return ret; + } -/* - * Handlers for Internet Small Computer Systems Interface (iSCSI) - */ + return 24; +} -u8 iscsi_get_fabric_proto_ident(struct se_portal_group *se_tpg) +static int srp_get_pr_transport_id( + struct se_node_acl *nacl, + int *format_code, + unsigned char *buf) { - /* - * This value is defined for "Internet SCSI (iSCSI)" - * in spc4r17 section 7.5.1 Table 362 - */ - return 0x5; + const char *p; + unsigned len, count, leading_zero_bytes; + int rc; + + p = nacl->initiatorname; + if (strncasecmp(p, "0x", 2) == 0) + p += 2; + len = strlen(p); + if (len % 2) + return -EINVAL; + + count = min(len / 2, 16U); + leading_zero_bytes = 16 - count; + memset(buf + 8, 0, leading_zero_bytes); + rc = hex2bin(buf + 8 + leading_zero_bytes, p, count); + if (rc < 0) { + pr_debug("hex2bin failed for %s: %d\n", __func__, rc); + return rc; + } + + return 24; } -EXPORT_SYMBOL(iscsi_get_fabric_proto_ident); -u32 iscsi_get_pr_transport_id( - struct se_portal_group *se_tpg, +static int iscsi_get_pr_transport_id( struct se_node_acl *se_nacl, struct t10_pr_registration *pr_reg, int *format_code, @@ -231,10 +148,6 @@ u32 iscsi_get_pr_transport_id( spin_lock_irq(&se_nacl->nacl_sess_lock); /* - * Set PROTOCOL IDENTIFIER to 5h for iSCSI - */ - buf[0] = 0x05; - /* * From spc4r17 Section 7.5.4.6: TransportID for initiator * ports using SCSI over iSCSI. * @@ -313,10 +226,8 @@ u32 iscsi_get_pr_transport_id( return len; } -EXPORT_SYMBOL(iscsi_get_pr_transport_id); -u32 iscsi_get_pr_transport_id_len( - struct se_portal_group *se_tpg, +static int iscsi_get_pr_transport_id_len( struct se_node_acl *se_nacl, struct t10_pr_registration *pr_reg, int *format_code) @@ -359,9 +270,8 @@ u32 iscsi_get_pr_transport_id_len( return len; } -EXPORT_SYMBOL(iscsi_get_pr_transport_id_len); -char *iscsi_parse_pr_out_transport_id( +static char *iscsi_parse_pr_out_transport_id( struct se_portal_group *se_tpg, const char *buf, u32 *out_tid_len, @@ -448,4 +358,79 @@ char *iscsi_parse_pr_out_transport_id( return (char *)&buf[4]; } -EXPORT_SYMBOL(iscsi_parse_pr_out_transport_id); + +int target_get_pr_transport_id_len(struct se_node_acl *nacl, + struct t10_pr_registration *pr_reg, int *format_code) +{ + switch (nacl->se_tpg->proto_id) { + case SCSI_PROTOCOL_FCP: + case SCSI_PROTOCOL_SBP: + case SCSI_PROTOCOL_SRP: + case SCSI_PROTOCOL_SAS: + break; + case SCSI_PROTOCOL_ISCSI: + return iscsi_get_pr_transport_id_len(nacl, pr_reg, format_code); + default: + pr_err("Unknown proto_id: 0x%02x\n", nacl->se_tpg->proto_id); + return -EINVAL; + } + + /* + * Most transports use a fixed length 24 byte identifier. + */ + *format_code = 0; + return 24; +} + +int target_get_pr_transport_id(struct se_node_acl *nacl, + struct t10_pr_registration *pr_reg, int *format_code, + unsigned char *buf) +{ + switch (nacl->se_tpg->proto_id) { + case SCSI_PROTOCOL_SAS: + return sas_get_pr_transport_id(nacl, format_code, buf); + case SCSI_PROTOCOL_SBP: + return sbp_get_pr_transport_id(nacl, format_code, buf); + case SCSI_PROTOCOL_SRP: + return srp_get_pr_transport_id(nacl, format_code, buf); + case SCSI_PROTOCOL_FCP: + return fc_get_pr_transport_id(nacl, format_code, buf); + case SCSI_PROTOCOL_ISCSI: + return iscsi_get_pr_transport_id(nacl, pr_reg, format_code, + buf); + default: + pr_err("Unknown proto_id: 0x%02x\n", nacl->se_tpg->proto_id); + return -EINVAL; + } +} + +const char *target_parse_pr_out_transport_id(struct se_portal_group *tpg, + const char *buf, u32 *out_tid_len, char **port_nexus_ptr) +{ + u32 offset; + + switch (tpg->proto_id) { + case SCSI_PROTOCOL_SAS: + /* + * Assume the FORMAT CODE 00b from spc4r17, 7.5.4.7 TransportID + * for initiator ports using SCSI over SAS Serial SCSI Protocol. + */ + offset = 4; + break; + case SCSI_PROTOCOL_SBP: + case SCSI_PROTOCOL_SRP: + case SCSI_PROTOCOL_FCP: + offset = 8; + break; + case SCSI_PROTOCOL_ISCSI: + return iscsi_parse_pr_out_transport_id(tpg, buf, out_tid_len, + port_nexus_ptr); + default: + pr_err("Unknown proto_id: 0x%02x\n", tpg->proto_id); + return NULL; + } + + *port_nexus_ptr = NULL; + *out_tid_len = 24; + return buf + offset; +} |