diff options
Diffstat (limited to 'drivers/scsi/scsi_transport_fc.c')
-rw-r--r-- | drivers/scsi/scsi_transport_fc.c | 417 |
1 files changed, 416 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c index 2ff7f06203da..a926e8f9e56e 100644 --- a/drivers/scsi/scsi_transport_fc.c +++ b/drivers/scsi/scsi_transport_fc.c @@ -22,6 +22,7 @@ #include <net/netlink.h> #include <scsi/scsi_netlink_fc.h> #include <scsi/scsi_bsg_fc.h> +#include <uapi/scsi/fc/fc_els.h> #include "scsi_priv.h" static int fc_queue_work(struct Scsi_Host *, struct work_struct *); @@ -33,6 +34,11 @@ static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); static void fc_bsg_remove(struct request_queue *); static void fc_bsg_goose_queue(struct fc_rport *); +static void fc_li_stats_update(struct fc_fn_li_desc *li_desc, + struct fc_fpin_stats *stats); +static void fc_delivery_stats_update(u32 reason_code, + struct fc_fpin_stats *stats); +static void fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats); /* * Module Parameters @@ -419,6 +425,7 @@ static int fc_host_setup(struct transport_container *tc, struct device *dev, fc_host->fabric_name = -1; memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); + memset(&fc_host->fpin_stats, 0, sizeof(fc_host->fpin_stats)); fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; @@ -629,7 +636,263 @@ fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, EXPORT_SYMBOL(fc_host_post_vendor_event); /** - * fc_host_rcv_fpin - routine to process a received FPIN. + * fc_find_rport_by_wwpn - find the fc_rport pointer for a given wwpn + * @shost: host the fc_rport is associated with + * @wwpn: wwpn of the fc_rport device + * + * Notes: + * This routine assumes no locks are held on entry. + */ +struct fc_rport * +fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn) +{ + struct fc_rport *rport; + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + + list_for_each_entry(rport, &fc_host_rports(shost), peers) { + if (rport->port_state != FC_PORTSTATE_ONLINE) + continue; + + if (rport->port_name == wwpn) { + spin_unlock_irqrestore(shost->host_lock, flags); + return rport; + } + } + + spin_unlock_irqrestore(shost->host_lock, flags); + return NULL; +} +EXPORT_SYMBOL(fc_find_rport_by_wwpn); + +static void +fc_li_stats_update(struct fc_fn_li_desc *li_desc, + struct fc_fpin_stats *stats) +{ + stats->li += be32_to_cpu(li_desc->event_count); + switch (be16_to_cpu(li_desc->event_type)) { + case FPIN_LI_UNKNOWN: + stats->li_failure_unknown += + be32_to_cpu(li_desc->event_count); + break; + case FPIN_LI_LINK_FAILURE: + stats->li_link_failure_count += + be32_to_cpu(li_desc->event_count); + break; + case FPIN_LI_LOSS_OF_SYNC: + stats->li_loss_of_sync_count += + be32_to_cpu(li_desc->event_count); + break; + case FPIN_LI_LOSS_OF_SIG: + stats->li_loss_of_signals_count += + be32_to_cpu(li_desc->event_count); + break; + case FPIN_LI_PRIM_SEQ_ERR: + stats->li_prim_seq_err_count += + be32_to_cpu(li_desc->event_count); + break; + case FPIN_LI_INVALID_TX_WD: + stats->li_invalid_tx_word_count += + be32_to_cpu(li_desc->event_count); + break; + case FPIN_LI_INVALID_CRC: + stats->li_invalid_crc_count += + be32_to_cpu(li_desc->event_count); + break; + case FPIN_LI_DEVICE_SPEC: + stats->li_device_specific += + be32_to_cpu(li_desc->event_count); + break; + } +} + +static void +fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats) +{ + stats->dn++; + switch (reason_code) { + case FPIN_DELI_UNKNOWN: + stats->dn_unknown++; + break; + case FPIN_DELI_TIMEOUT: + stats->dn_timeout++; + break; + case FPIN_DELI_UNABLE_TO_ROUTE: + stats->dn_unable_to_route++; + break; + case FPIN_DELI_DEVICE_SPEC: + stats->dn_device_specific++; + break; + } +} + +static void +fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats) +{ + stats->cn++; + switch (event_type) { + case FPIN_CONGN_CLEAR: + stats->cn_clear++; + break; + case FPIN_CONGN_LOST_CREDIT: + stats->cn_lost_credit++; + break; + case FPIN_CONGN_CREDIT_STALL: + stats->cn_credit_stall++; + break; + case FPIN_CONGN_OVERSUBSCRIPTION: + stats->cn_oversubscription++; + break; + case FPIN_CONGN_DEVICE_SPEC: + stats->cn_device_specific++; + } +} + +/* + * fc_fpin_li_stats_update - routine to update Link Integrity + * event statistics. + * @shost: host the FPIN was received on + * @tlv: pointer to link integrity descriptor + * + */ +static void +fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv) +{ + u8 i; + struct fc_rport *rport = NULL; + struct fc_rport *attach_rport = NULL; + struct fc_host_attrs *fc_host = shost_to_fc_host(shost); + struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv; + u64 wwpn; + + rport = fc_find_rport_by_wwpn(shost, + be64_to_cpu(li_desc->attached_wwpn)); + if (rport && + (rport->roles & FC_PORT_ROLE_FCP_TARGET || + rport->roles & FC_PORT_ROLE_NVME_TARGET)) { + attach_rport = rport; + fc_li_stats_update(li_desc, &attach_rport->fpin_stats); + } + + if (be32_to_cpu(li_desc->pname_count) > 0) { + for (i = 0; + i < be32_to_cpu(li_desc->pname_count); + i++) { + wwpn = be64_to_cpu(li_desc->pname_list[i]); + rport = fc_find_rport_by_wwpn(shost, wwpn); + if (rport && + (rport->roles & FC_PORT_ROLE_FCP_TARGET || + rport->roles & FC_PORT_ROLE_NVME_TARGET)) { + if (rport == attach_rport) + continue; + fc_li_stats_update(li_desc, + &rport->fpin_stats); + } + } + } + + if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn)) + fc_li_stats_update(li_desc, &fc_host->fpin_stats); +} + +/* + * fc_fpin_delivery_stats_update - routine to update Delivery Notification + * event statistics. + * @shost: host the FPIN was received on + * @tlv: pointer to delivery descriptor + * + */ +static void +fc_fpin_delivery_stats_update(struct Scsi_Host *shost, + struct fc_tlv_desc *tlv) +{ + struct fc_rport *rport = NULL; + struct fc_rport *attach_rport = NULL; + struct fc_host_attrs *fc_host = shost_to_fc_host(shost); + struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv; + u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code); + + rport = fc_find_rport_by_wwpn(shost, + be64_to_cpu(dn_desc->attached_wwpn)); + if (rport && + (rport->roles & FC_PORT_ROLE_FCP_TARGET || + rport->roles & FC_PORT_ROLE_NVME_TARGET)) { + attach_rport = rport; + fc_delivery_stats_update(reason_code, + &attach_rport->fpin_stats); + } + + if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn)) + fc_delivery_stats_update(reason_code, &fc_host->fpin_stats); +} + +/* + * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion + * event statistics. + * @shost: host the FPIN was received on + * @tlv: pointer to peer congestion descriptor + * + */ +static void +fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost, + struct fc_tlv_desc *tlv) +{ + u8 i; + struct fc_rport *rport = NULL; + struct fc_rport *attach_rport = NULL; + struct fc_fn_peer_congn_desc *pc_desc = + (struct fc_fn_peer_congn_desc *)tlv; + u16 event_type = be16_to_cpu(pc_desc->event_type); + u64 wwpn; + + rport = fc_find_rport_by_wwpn(shost, + be64_to_cpu(pc_desc->attached_wwpn)); + if (rport && + (rport->roles & FC_PORT_ROLE_FCP_TARGET || + rport->roles & FC_PORT_ROLE_NVME_TARGET)) { + attach_rport = rport; + fc_cn_stats_update(event_type, &attach_rport->fpin_stats); + } + + if (be32_to_cpu(pc_desc->pname_count) > 0) { + for (i = 0; + i < be32_to_cpu(pc_desc->pname_count); + i++) { + wwpn = be64_to_cpu(pc_desc->pname_list[i]); + rport = fc_find_rport_by_wwpn(shost, wwpn); + if (rport && + (rport->roles & FC_PORT_ROLE_FCP_TARGET || + rport->roles & FC_PORT_ROLE_NVME_TARGET)) { + if (rport == attach_rport) + continue; + fc_cn_stats_update(event_type, + &rport->fpin_stats); + } + } + } +} + +/* + * fc_fpin_congn_stats_update - routine to update Congestion + * event statistics. + * @shost: host the FPIN was received on + * @tlv: pointer to congestion descriptor + * + */ +static void +fc_fpin_congn_stats_update(struct Scsi_Host *shost, + struct fc_tlv_desc *tlv) +{ + struct fc_host_attrs *fc_host = shost_to_fc_host(shost); + struct fc_fn_congn_desc *congn = (struct fc_fn_congn_desc *)tlv; + + fc_cn_stats_update(be16_to_cpu(congn->event_type), + &fc_host->fpin_stats); +} + +/** + * fc_host_fpin_rcv - routine to process a received FPIN. * @shost: host the FPIN was received on * @fpin_len: length of FPIN payload, in bytes * @fpin_buf: pointer to FPIN payload @@ -640,6 +903,38 @@ EXPORT_SYMBOL(fc_host_post_vendor_event); void fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf) { + struct fc_els_fpin *fpin = (struct fc_els_fpin *)fpin_buf; + struct fc_tlv_desc *tlv; + u32 desc_cnt = 0, bytes_remain; + u32 dtag; + + /* Update Statistics */ + tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0]; + bytes_remain = fpin_len - offsetof(struct fc_els_fpin, fpin_desc); + bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len)); + + while (bytes_remain >= FC_TLV_DESC_HDR_SZ && + bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) { + dtag = be32_to_cpu(tlv->desc_tag); + switch (dtag) { + case ELS_DTAG_LNK_INTEGRITY: + fc_fpin_li_stats_update(shost, tlv); + break; + case ELS_DTAG_DELIVERY: + fc_fpin_delivery_stats_update(shost, tlv); + break; + case ELS_DTAG_PEER_CONGEST: + fc_fpin_peer_congn_stats_update(shost, tlv); + break; + case ELS_DTAG_CONGESTION: + fc_fpin_congn_stats_update(shost, tlv); + } + + desc_cnt++; + bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv); + tlv = fc_tlv_next_desc(tlv); + } + fc_host_post_fc_event(shost, fc_get_event_number(), FCH_EVT_LINK_FPIN, fpin_len, fpin_buf, 0); } @@ -991,6 +1286,67 @@ store_fc_rport_fast_io_fail_tmo(struct device *dev, static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); +#define fc_rport_fpin_statistic(name) \ +static ssize_t fc_rport_fpinstat_##name(struct device *cd, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + struct fc_rport *rport = transport_class_to_rport(cd); \ + \ + return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \ +} \ +static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL) + +fc_rport_fpin_statistic(dn); +fc_rport_fpin_statistic(dn_unknown); +fc_rport_fpin_statistic(dn_timeout); +fc_rport_fpin_statistic(dn_unable_to_route); +fc_rport_fpin_statistic(dn_device_specific); +fc_rport_fpin_statistic(cn); +fc_rport_fpin_statistic(cn_clear); +fc_rport_fpin_statistic(cn_lost_credit); +fc_rport_fpin_statistic(cn_credit_stall); +fc_rport_fpin_statistic(cn_oversubscription); +fc_rport_fpin_statistic(cn_device_specific); +fc_rport_fpin_statistic(li); +fc_rport_fpin_statistic(li_failure_unknown); +fc_rport_fpin_statistic(li_link_failure_count); +fc_rport_fpin_statistic(li_loss_of_sync_count); +fc_rport_fpin_statistic(li_loss_of_signals_count); +fc_rport_fpin_statistic(li_prim_seq_err_count); +fc_rport_fpin_statistic(li_invalid_tx_word_count); +fc_rport_fpin_statistic(li_invalid_crc_count); +fc_rport_fpin_statistic(li_device_specific); + +static struct attribute *fc_rport_statistics_attrs[] = { + &device_attr_rport_fpin_dn.attr, + &device_attr_rport_fpin_dn_unknown.attr, + &device_attr_rport_fpin_dn_timeout.attr, + &device_attr_rport_fpin_dn_unable_to_route.attr, + &device_attr_rport_fpin_dn_device_specific.attr, + &device_attr_rport_fpin_li.attr, + &device_attr_rport_fpin_li_failure_unknown.attr, + &device_attr_rport_fpin_li_link_failure_count.attr, + &device_attr_rport_fpin_li_loss_of_sync_count.attr, + &device_attr_rport_fpin_li_loss_of_signals_count.attr, + &device_attr_rport_fpin_li_prim_seq_err_count.attr, + &device_attr_rport_fpin_li_invalid_tx_word_count.attr, + &device_attr_rport_fpin_li_invalid_crc_count.attr, + &device_attr_rport_fpin_li_device_specific.attr, + &device_attr_rport_fpin_cn.attr, + &device_attr_rport_fpin_cn_clear.attr, + &device_attr_rport_fpin_cn_lost_credit.attr, + &device_attr_rport_fpin_cn_credit_stall.attr, + &device_attr_rport_fpin_cn_oversubscription.attr, + &device_attr_rport_fpin_cn_device_specific.attr, + NULL +}; + +static struct attribute_group fc_rport_statistics_group = { + .name = "statistics", + .attrs = fc_rport_statistics_attrs, +}; + /* * FC SCSI Target Attribute Management @@ -1744,6 +2100,42 @@ fc_host_statistic(fc_xid_not_found); fc_host_statistic(fc_xid_busy); fc_host_statistic(fc_seq_not_found); fc_host_statistic(fc_non_bls_resp); +fc_host_statistic(cn_sig_warn); +fc_host_statistic(cn_sig_alarm); + + +#define fc_host_fpin_statistic(name) \ +static ssize_t fc_host_fpinstat_##name(struct device *cd, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + struct Scsi_Host *shost = transport_class_to_shost(cd); \ + struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \ + \ + return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \ +} \ +static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL) + +fc_host_fpin_statistic(dn); +fc_host_fpin_statistic(dn_unknown); +fc_host_fpin_statistic(dn_timeout); +fc_host_fpin_statistic(dn_unable_to_route); +fc_host_fpin_statistic(dn_device_specific); +fc_host_fpin_statistic(cn); +fc_host_fpin_statistic(cn_clear); +fc_host_fpin_statistic(cn_lost_credit); +fc_host_fpin_statistic(cn_credit_stall); +fc_host_fpin_statistic(cn_oversubscription); +fc_host_fpin_statistic(cn_device_specific); +fc_host_fpin_statistic(li); +fc_host_fpin_statistic(li_failure_unknown); +fc_host_fpin_statistic(li_link_failure_count); +fc_host_fpin_statistic(li_loss_of_sync_count); +fc_host_fpin_statistic(li_loss_of_signals_count); +fc_host_fpin_statistic(li_prim_seq_err_count); +fc_host_fpin_statistic(li_invalid_tx_word_count); +fc_host_fpin_statistic(li_invalid_crc_count); +fc_host_fpin_statistic(li_device_specific); static ssize_t fc_reset_statistics(struct device *dev, struct device_attribute *attr, @@ -1793,7 +2185,29 @@ static struct attribute *fc_statistics_attrs[] = { &device_attr_host_fc_xid_busy.attr, &device_attr_host_fc_seq_not_found.attr, &device_attr_host_fc_non_bls_resp.attr, + &device_attr_host_cn_sig_warn.attr, + &device_attr_host_cn_sig_alarm.attr, &device_attr_host_reset_statistics.attr, + &device_attr_host_fpin_dn.attr, + &device_attr_host_fpin_dn_unknown.attr, + &device_attr_host_fpin_dn_timeout.attr, + &device_attr_host_fpin_dn_unable_to_route.attr, + &device_attr_host_fpin_dn_device_specific.attr, + &device_attr_host_fpin_li.attr, + &device_attr_host_fpin_li_failure_unknown.attr, + &device_attr_host_fpin_li_link_failure_count.attr, + &device_attr_host_fpin_li_loss_of_sync_count.attr, + &device_attr_host_fpin_li_loss_of_signals_count.attr, + &device_attr_host_fpin_li_prim_seq_err_count.attr, + &device_attr_host_fpin_li_invalid_tx_word_count.attr, + &device_attr_host_fpin_li_invalid_crc_count.attr, + &device_attr_host_fpin_li_device_specific.attr, + &device_attr_host_fpin_cn.attr, + &device_attr_host_fpin_cn_clear.attr, + &device_attr_host_fpin_cn_lost_credit.attr, + &device_attr_host_fpin_cn_credit_stall.attr, + &device_attr_host_fpin_cn_oversubscription.attr, + &device_attr_host_fpin_cn_device_specific.attr, NULL }; @@ -2177,6 +2591,7 @@ fc_attach_transport(struct fc_function_template *ft) i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; i->rport_attr_cont.ac.class = &fc_rport_class.class; i->rport_attr_cont.ac.match = fc_rport_match; + i->rport_attr_cont.statistics = &fc_rport_statistics_group; transport_container_register(&i->rport_attr_cont); i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; |