mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2194 lines
58 KiB
2194 lines
58 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Copyright(c) 2007 Intel Corporation. All rights reserved. |
|
* |
|
* Maintained at www.Open-FCoE.org |
|
*/ |
|
|
|
/* |
|
* PORT LOCKING NOTES |
|
* |
|
* These comments only apply to the 'port code' which consists of the lport, |
|
* disc and rport blocks. |
|
* |
|
* MOTIVATION |
|
* |
|
* The lport, disc and rport blocks all have mutexes that are used to protect |
|
* those objects. The main motivation for these locks is to prevent from |
|
* having an lport reset just before we send a frame. In that scenario the |
|
* lport's FID would get set to zero and then we'd send a frame with an |
|
* invalid SID. We also need to ensure that states don't change unexpectedly |
|
* while processing another state. |
|
* |
|
* HIERARCHY |
|
* |
|
* The following hierarchy defines the locking rules. A greater lock |
|
* may be held before acquiring a lesser lock, but a lesser lock should never |
|
* be held while attempting to acquire a greater lock. Here is the hierarchy- |
|
* |
|
* lport > disc, lport > rport, disc > rport |
|
* |
|
* CALLBACKS |
|
* |
|
* The callbacks cause complications with this scheme. There is a callback |
|
* from the rport (to either lport or disc) and a callback from disc |
|
* (to the lport). |
|
* |
|
* As rports exit the rport state machine a callback is made to the owner of |
|
* the rport to notify success or failure. Since the callback is likely to |
|
* cause the lport or disc to grab its lock we cannot hold the rport lock |
|
* while making the callback. To ensure that the rport is not free'd while |
|
* processing the callback the rport callbacks are serialized through a |
|
* single-threaded workqueue. An rport would never be free'd while in a |
|
* callback handler because no other rport work in this queue can be executed |
|
* at the same time. |
|
* |
|
* When discovery succeeds or fails a callback is made to the lport as |
|
* notification. Currently, successful discovery causes the lport to take no |
|
* action. A failure will cause the lport to reset. There is likely a circular |
|
* locking problem with this implementation. |
|
*/ |
|
|
|
/* |
|
* LPORT LOCKING |
|
* |
|
* The critical sections protected by the lport's mutex are quite broad and |
|
* may be improved upon in the future. The lport code and its locking doesn't |
|
* influence the I/O path, so excessive locking doesn't penalize I/O |
|
* performance. |
|
* |
|
* The strategy is to lock whenever processing a request or response. Note |
|
* that every _enter_* function corresponds to a state change. They generally |
|
* change the lports state and then send a request out on the wire. We lock |
|
* before calling any of these functions to protect that state change. This |
|
* means that the entry points into the lport block manage the locks while |
|
* the state machine can transition between states (i.e. _enter_* functions) |
|
* while always staying protected. |
|
* |
|
* When handling responses we also hold the lport mutex broadly. When the |
|
* lport receives the response frame it locks the mutex and then calls the |
|
* appropriate handler for the particuar response. Generally a response will |
|
* trigger a state change and so the lock must already be held. |
|
* |
|
* Retries also have to consider the locking. The retries occur from a work |
|
* context and the work function will lock the lport and then retry the state |
|
* (i.e. _enter_* function). |
|
*/ |
|
|
|
#include <linux/timer.h> |
|
#include <linux/delay.h> |
|
#include <linux/module.h> |
|
#include <linux/slab.h> |
|
#include <asm/unaligned.h> |
|
|
|
#include <scsi/fc/fc_gs.h> |
|
|
|
#include <scsi/libfc.h> |
|
#include <linux/scatterlist.h> |
|
|
|
#include "fc_encode.h" |
|
#include "fc_libfc.h" |
|
|
|
/* Fabric IDs to use for point-to-point mode, chosen on whims. */ |
|
#define FC_LOCAL_PTP_FID_LO 0x010101 |
|
#define FC_LOCAL_PTP_FID_HI 0x010102 |
|
|
|
#define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/ |
|
#define MAX_CT_PAYLOAD 2048 |
|
#define DISCOVERED_PORTS 4 |
|
#define NUMBER_OF_PORTS 1 |
|
|
|
static void fc_lport_error(struct fc_lport *, struct fc_frame *); |
|
|
|
static void fc_lport_enter_reset(struct fc_lport *); |
|
static void fc_lport_enter_flogi(struct fc_lport *); |
|
static void fc_lport_enter_dns(struct fc_lport *); |
|
static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state); |
|
static void fc_lport_enter_scr(struct fc_lport *); |
|
static void fc_lport_enter_ready(struct fc_lport *); |
|
static void fc_lport_enter_logo(struct fc_lport *); |
|
static void fc_lport_enter_fdmi(struct fc_lport *lport); |
|
static void fc_lport_enter_ms(struct fc_lport *, enum fc_lport_state); |
|
|
|
static const char *fc_lport_state_names[] = { |
|
[LPORT_ST_DISABLED] = "disabled", |
|
[LPORT_ST_FLOGI] = "FLOGI", |
|
[LPORT_ST_DNS] = "dNS", |
|
[LPORT_ST_RNN_ID] = "RNN_ID", |
|
[LPORT_ST_RSNN_NN] = "RSNN_NN", |
|
[LPORT_ST_RSPN_ID] = "RSPN_ID", |
|
[LPORT_ST_RFT_ID] = "RFT_ID", |
|
[LPORT_ST_RFF_ID] = "RFF_ID", |
|
[LPORT_ST_FDMI] = "FDMI", |
|
[LPORT_ST_RHBA] = "RHBA", |
|
[LPORT_ST_RPA] = "RPA", |
|
[LPORT_ST_DHBA] = "DHBA", |
|
[LPORT_ST_DPRT] = "DPRT", |
|
[LPORT_ST_SCR] = "SCR", |
|
[LPORT_ST_READY] = "Ready", |
|
[LPORT_ST_LOGO] = "LOGO", |
|
[LPORT_ST_RESET] = "reset", |
|
}; |
|
|
|
/** |
|
* struct fc_bsg_info - FC Passthrough managemet structure |
|
* @job: The passthrough job |
|
* @lport: The local port to pass through a command |
|
* @rsp_code: The expected response code |
|
* @sg: job->reply_payload.sg_list |
|
* @nents: job->reply_payload.sg_cnt |
|
* @offset: The offset into the response data |
|
*/ |
|
struct fc_bsg_info { |
|
struct bsg_job *job; |
|
struct fc_lport *lport; |
|
u16 rsp_code; |
|
struct scatterlist *sg; |
|
u32 nents; |
|
size_t offset; |
|
}; |
|
|
|
/** |
|
* fc_frame_drop() - Dummy frame handler |
|
* @lport: The local port the frame was received on |
|
* @fp: The received frame |
|
*/ |
|
static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) |
|
{ |
|
fc_frame_free(fp); |
|
return 0; |
|
} |
|
|
|
/** |
|
* fc_lport_rport_callback() - Event handler for rport events |
|
* @lport: The lport which is receiving the event |
|
* @rdata: private remote port data |
|
* @event: The event that occurred |
|
* |
|
* Locking Note: The rport lock should not be held when calling |
|
* this function. |
|
*/ |
|
static void fc_lport_rport_callback(struct fc_lport *lport, |
|
struct fc_rport_priv *rdata, |
|
enum fc_rport_event event) |
|
{ |
|
FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event, |
|
rdata->ids.port_id); |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
switch (event) { |
|
case RPORT_EV_READY: |
|
if (lport->state == LPORT_ST_DNS) { |
|
lport->dns_rdata = rdata; |
|
fc_lport_enter_ns(lport, LPORT_ST_RNN_ID); |
|
} else if (lport->state == LPORT_ST_FDMI) { |
|
lport->ms_rdata = rdata; |
|
fc_lport_enter_ms(lport, LPORT_ST_DHBA); |
|
} else { |
|
FC_LPORT_DBG(lport, "Received an READY event " |
|
"on port (%6.6x) for the directory " |
|
"server, but the lport is not " |
|
"in the DNS or FDMI state, it's in the " |
|
"%d state", rdata->ids.port_id, |
|
lport->state); |
|
fc_rport_logoff(rdata); |
|
} |
|
break; |
|
case RPORT_EV_LOGO: |
|
case RPORT_EV_FAILED: |
|
case RPORT_EV_STOP: |
|
if (rdata->ids.port_id == FC_FID_DIR_SERV) |
|
lport->dns_rdata = NULL; |
|
else if (rdata->ids.port_id == FC_FID_MGMT_SERV) |
|
lport->ms_rdata = NULL; |
|
break; |
|
case RPORT_EV_NONE: |
|
break; |
|
} |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
|
|
/** |
|
* fc_lport_state() - Return a string which represents the lport's state |
|
* @lport: The lport whose state is to converted to a string |
|
*/ |
|
static const char *fc_lport_state(struct fc_lport *lport) |
|
{ |
|
const char *cp; |
|
|
|
cp = fc_lport_state_names[lport->state]; |
|
if (!cp) |
|
cp = "unknown"; |
|
return cp; |
|
} |
|
|
|
/** |
|
* fc_lport_ptp_setup() - Create an rport for point-to-point mode |
|
* @lport: The lport to attach the ptp rport to |
|
* @remote_fid: The FID of the ptp rport |
|
* @remote_wwpn: The WWPN of the ptp rport |
|
* @remote_wwnn: The WWNN of the ptp rport |
|
*/ |
|
static void fc_lport_ptp_setup(struct fc_lport *lport, |
|
u32 remote_fid, u64 remote_wwpn, |
|
u64 remote_wwnn) |
|
{ |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
if (lport->ptp_rdata) { |
|
fc_rport_logoff(lport->ptp_rdata); |
|
kref_put(&lport->ptp_rdata->kref, fc_rport_destroy); |
|
} |
|
mutex_lock(&lport->disc.disc_mutex); |
|
lport->ptp_rdata = fc_rport_create(lport, remote_fid); |
|
kref_get(&lport->ptp_rdata->kref); |
|
lport->ptp_rdata->ids.port_name = remote_wwpn; |
|
lport->ptp_rdata->ids.node_name = remote_wwnn; |
|
mutex_unlock(&lport->disc.disc_mutex); |
|
|
|
fc_rport_login(lport->ptp_rdata); |
|
|
|
fc_lport_enter_ready(lport); |
|
} |
|
|
|
/** |
|
* fc_get_host_port_state() - Return the port state of the given Scsi_Host |
|
* @shost: The SCSI host whose port state is to be determined |
|
*/ |
|
void fc_get_host_port_state(struct Scsi_Host *shost) |
|
{ |
|
struct fc_lport *lport = shost_priv(shost); |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
if (!lport->link_up) |
|
fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; |
|
else |
|
switch (lport->state) { |
|
case LPORT_ST_READY: |
|
fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; |
|
break; |
|
default: |
|
fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; |
|
} |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
EXPORT_SYMBOL(fc_get_host_port_state); |
|
|
|
/** |
|
* fc_get_host_speed() - Return the speed of the given Scsi_Host |
|
* @shost: The SCSI host whose port speed is to be determined |
|
*/ |
|
void fc_get_host_speed(struct Scsi_Host *shost) |
|
{ |
|
struct fc_lport *lport = shost_priv(shost); |
|
|
|
fc_host_speed(shost) = lport->link_speed; |
|
} |
|
EXPORT_SYMBOL(fc_get_host_speed); |
|
|
|
/** |
|
* fc_get_host_stats() - Return the Scsi_Host's statistics |
|
* @shost: The SCSI host whose statistics are to be returned |
|
*/ |
|
struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost) |
|
{ |
|
struct fc_host_statistics *fc_stats; |
|
struct fc_lport *lport = shost_priv(shost); |
|
unsigned int cpu; |
|
u64 fcp_in_bytes = 0; |
|
u64 fcp_out_bytes = 0; |
|
|
|
fc_stats = &lport->host_stats; |
|
memset(fc_stats, 0, sizeof(struct fc_host_statistics)); |
|
|
|
fc_stats->seconds_since_last_reset = (jiffies - lport->boot_time) / HZ; |
|
|
|
for_each_possible_cpu(cpu) { |
|
struct fc_stats *stats; |
|
|
|
stats = per_cpu_ptr(lport->stats, cpu); |
|
|
|
fc_stats->tx_frames += stats->TxFrames; |
|
fc_stats->tx_words += stats->TxWords; |
|
fc_stats->rx_frames += stats->RxFrames; |
|
fc_stats->rx_words += stats->RxWords; |
|
fc_stats->error_frames += stats->ErrorFrames; |
|
fc_stats->invalid_crc_count += stats->InvalidCRCCount; |
|
fc_stats->fcp_input_requests += stats->InputRequests; |
|
fc_stats->fcp_output_requests += stats->OutputRequests; |
|
fc_stats->fcp_control_requests += stats->ControlRequests; |
|
fcp_in_bytes += stats->InputBytes; |
|
fcp_out_bytes += stats->OutputBytes; |
|
fc_stats->fcp_packet_alloc_failures += stats->FcpPktAllocFails; |
|
fc_stats->fcp_packet_aborts += stats->FcpPktAborts; |
|
fc_stats->fcp_frame_alloc_failures += stats->FcpFrameAllocFails; |
|
fc_stats->link_failure_count += stats->LinkFailureCount; |
|
} |
|
fc_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000); |
|
fc_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000); |
|
fc_stats->lip_count = -1; |
|
fc_stats->nos_count = -1; |
|
fc_stats->loss_of_sync_count = -1; |
|
fc_stats->loss_of_signal_count = -1; |
|
fc_stats->prim_seq_protocol_err_count = -1; |
|
fc_stats->dumped_frames = -1; |
|
|
|
/* update exches stats */ |
|
fc_exch_update_stats(lport); |
|
|
|
return fc_stats; |
|
} |
|
EXPORT_SYMBOL(fc_get_host_stats); |
|
|
|
/** |
|
* fc_lport_flogi_fill() - Fill in FLOGI command for request |
|
* @lport: The local port the FLOGI is for |
|
* @flogi: The FLOGI command |
|
* @op: The opcode |
|
*/ |
|
static void fc_lport_flogi_fill(struct fc_lport *lport, |
|
struct fc_els_flogi *flogi, |
|
unsigned int op) |
|
{ |
|
struct fc_els_csp *sp; |
|
struct fc_els_cssp *cp; |
|
|
|
memset(flogi, 0, sizeof(*flogi)); |
|
flogi->fl_cmd = (u8) op; |
|
put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn); |
|
put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn); |
|
sp = &flogi->fl_csp; |
|
sp->sp_hi_ver = 0x20; |
|
sp->sp_lo_ver = 0x20; |
|
sp->sp_bb_cred = htons(10); /* this gets set by gateway */ |
|
sp->sp_bb_data = htons((u16) lport->mfs); |
|
cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */ |
|
cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ); |
|
if (op != ELS_FLOGI) { |
|
sp->sp_features = htons(FC_SP_FT_CIRO); |
|
sp->sp_tot_seq = htons(255); /* seq. we accept */ |
|
sp->sp_rel_off = htons(0x1f); |
|
sp->sp_e_d_tov = htonl(lport->e_d_tov); |
|
|
|
cp->cp_rdfs = htons((u16) lport->mfs); |
|
cp->cp_con_seq = htons(255); |
|
cp->cp_open_seq = 1; |
|
} |
|
} |
|
|
|
/** |
|
* fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port |
|
* @lport: The local port to add a new FC-4 type to |
|
* @type: The new FC-4 type |
|
*/ |
|
static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type) |
|
{ |
|
__be32 *mp; |
|
|
|
mp = &lport->fcts.ff_type_map[type / FC_NS_BPW]; |
|
*mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW)); |
|
} |
|
|
|
/** |
|
* fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report. |
|
* @lport: Fibre Channel local port receiving the RLIR |
|
* @fp: The RLIR request frame |
|
*/ |
|
static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp) |
|
{ |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n", |
|
fc_lport_state(lport)); |
|
|
|
fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
|
fc_frame_free(fp); |
|
} |
|
|
|
/** |
|
* fc_lport_recv_echo_req() - Handle received ECHO request |
|
* @lport: The local port receiving the ECHO |
|
* @in_fp: ECHO request frame |
|
*/ |
|
static void fc_lport_recv_echo_req(struct fc_lport *lport, |
|
struct fc_frame *in_fp) |
|
{ |
|
struct fc_frame *fp; |
|
unsigned int len; |
|
void *pp; |
|
void *dp; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n", |
|
fc_lport_state(lport)); |
|
|
|
len = fr_len(in_fp) - sizeof(struct fc_frame_header); |
|
pp = fc_frame_payload_get(in_fp, len); |
|
|
|
if (len < sizeof(__be32)) |
|
len = sizeof(__be32); |
|
|
|
fp = fc_frame_alloc(lport, len); |
|
if (fp) { |
|
dp = fc_frame_payload_get(fp, len); |
|
memcpy(dp, pp, len); |
|
*((__be32 *)dp) = htonl(ELS_LS_ACC << 24); |
|
fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
|
lport->tt.frame_send(lport, fp); |
|
} |
|
fc_frame_free(in_fp); |
|
} |
|
|
|
/** |
|
* fc_lport_recv_rnid_req() - Handle received Request Node ID data request |
|
* @lport: The local port receiving the RNID |
|
* @in_fp: The RNID request frame |
|
*/ |
|
static void fc_lport_recv_rnid_req(struct fc_lport *lport, |
|
struct fc_frame *in_fp) |
|
{ |
|
struct fc_frame *fp; |
|
struct fc_els_rnid *req; |
|
struct { |
|
struct fc_els_rnid_resp rnid; |
|
struct fc_els_rnid_cid cid; |
|
struct fc_els_rnid_gen gen; |
|
} *rp; |
|
struct fc_seq_els_data rjt_data; |
|
u8 fmt; |
|
size_t len; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Received RNID request while in state %s\n", |
|
fc_lport_state(lport)); |
|
|
|
req = fc_frame_payload_get(in_fp, sizeof(*req)); |
|
if (!req) { |
|
rjt_data.reason = ELS_RJT_LOGIC; |
|
rjt_data.explan = ELS_EXPL_NONE; |
|
fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data); |
|
} else { |
|
fmt = req->rnid_fmt; |
|
len = sizeof(*rp); |
|
if (fmt != ELS_RNIDF_GEN || |
|
ntohl(lport->rnid_gen.rnid_atype) == 0) { |
|
fmt = ELS_RNIDF_NONE; /* nothing to provide */ |
|
len -= sizeof(rp->gen); |
|
} |
|
fp = fc_frame_alloc(lport, len); |
|
if (fp) { |
|
rp = fc_frame_payload_get(fp, len); |
|
memset(rp, 0, len); |
|
rp->rnid.rnid_cmd = ELS_LS_ACC; |
|
rp->rnid.rnid_fmt = fmt; |
|
rp->rnid.rnid_cid_len = sizeof(rp->cid); |
|
rp->cid.rnid_wwpn = htonll(lport->wwpn); |
|
rp->cid.rnid_wwnn = htonll(lport->wwnn); |
|
if (fmt == ELS_RNIDF_GEN) { |
|
rp->rnid.rnid_sid_len = sizeof(rp->gen); |
|
memcpy(&rp->gen, &lport->rnid_gen, |
|
sizeof(rp->gen)); |
|
} |
|
fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0); |
|
lport->tt.frame_send(lport, fp); |
|
} |
|
} |
|
fc_frame_free(in_fp); |
|
} |
|
|
|
/** |
|
* fc_lport_recv_logo_req() - Handle received fabric LOGO request |
|
* @lport: The local port receiving the LOGO |
|
* @fp: The LOGO request frame |
|
*/ |
|
static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp) |
|
{ |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL); |
|
fc_lport_enter_reset(lport); |
|
fc_frame_free(fp); |
|
} |
|
|
|
/** |
|
* fc_fabric_login() - Start the lport state machine |
|
* @lport: The local port that should log into the fabric |
|
* |
|
* Locking Note: This function should not be called |
|
* with the lport lock held. |
|
*/ |
|
int fc_fabric_login(struct fc_lport *lport) |
|
{ |
|
int rc = -1; |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
if (lport->state == LPORT_ST_DISABLED || |
|
lport->state == LPORT_ST_LOGO) { |
|
fc_lport_state_enter(lport, LPORT_ST_RESET); |
|
fc_lport_enter_reset(lport); |
|
rc = 0; |
|
} |
|
mutex_unlock(&lport->lp_mutex); |
|
|
|
return rc; |
|
} |
|
EXPORT_SYMBOL(fc_fabric_login); |
|
|
|
/** |
|
* __fc_linkup() - Handler for transport linkup events |
|
* @lport: The lport whose link is up |
|
*/ |
|
void __fc_linkup(struct fc_lport *lport) |
|
{ |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
if (!lport->link_up) { |
|
lport->link_up = 1; |
|
|
|
if (lport->state == LPORT_ST_RESET) |
|
fc_lport_enter_flogi(lport); |
|
} |
|
} |
|
|
|
/** |
|
* fc_linkup() - Handler for transport linkup events |
|
* @lport: The local port whose link is up |
|
*/ |
|
void fc_linkup(struct fc_lport *lport) |
|
{ |
|
printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n", |
|
lport->host->host_no, lport->port_id); |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
__fc_linkup(lport); |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
EXPORT_SYMBOL(fc_linkup); |
|
|
|
/** |
|
* __fc_linkdown() - Handler for transport linkdown events |
|
* @lport: The lport whose link is down |
|
*/ |
|
void __fc_linkdown(struct fc_lport *lport) |
|
{ |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
if (lport->link_up) { |
|
lport->link_up = 0; |
|
fc_lport_enter_reset(lport); |
|
lport->tt.fcp_cleanup(lport); |
|
} |
|
} |
|
|
|
/** |
|
* fc_linkdown() - Handler for transport linkdown events |
|
* @lport: The local port whose link is down |
|
*/ |
|
void fc_linkdown(struct fc_lport *lport) |
|
{ |
|
printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n", |
|
lport->host->host_no, lport->port_id); |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
__fc_linkdown(lport); |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
EXPORT_SYMBOL(fc_linkdown); |
|
|
|
/** |
|
* fc_fabric_logoff() - Logout of the fabric |
|
* @lport: The local port to logoff the fabric |
|
* |
|
* Return value: |
|
* 0 for success, -1 for failure |
|
*/ |
|
int fc_fabric_logoff(struct fc_lport *lport) |
|
{ |
|
lport->tt.disc_stop_final(lport); |
|
mutex_lock(&lport->lp_mutex); |
|
if (lport->dns_rdata) |
|
fc_rport_logoff(lport->dns_rdata); |
|
mutex_unlock(&lport->lp_mutex); |
|
fc_rport_flush_queue(); |
|
mutex_lock(&lport->lp_mutex); |
|
fc_lport_enter_logo(lport); |
|
mutex_unlock(&lport->lp_mutex); |
|
cancel_delayed_work_sync(&lport->retry_work); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(fc_fabric_logoff); |
|
|
|
/** |
|
* fc_lport_destroy() - Unregister a fc_lport |
|
* @lport: The local port to unregister |
|
* |
|
* Note: |
|
* exit routine for fc_lport instance |
|
* clean-up all the allocated memory |
|
* and free up other system resources. |
|
* |
|
*/ |
|
int fc_lport_destroy(struct fc_lport *lport) |
|
{ |
|
mutex_lock(&lport->lp_mutex); |
|
lport->state = LPORT_ST_DISABLED; |
|
lport->link_up = 0; |
|
lport->tt.frame_send = fc_frame_drop; |
|
mutex_unlock(&lport->lp_mutex); |
|
|
|
lport->tt.fcp_abort_io(lport); |
|
lport->tt.disc_stop_final(lport); |
|
lport->tt.exch_mgr_reset(lport, 0, 0); |
|
cancel_delayed_work_sync(&lport->retry_work); |
|
fc_fc4_del_lport(lport); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(fc_lport_destroy); |
|
|
|
/** |
|
* fc_set_mfs() - Set the maximum frame size for a local port |
|
* @lport: The local port to set the MFS for |
|
* @mfs: The new MFS |
|
*/ |
|
int fc_set_mfs(struct fc_lport *lport, u32 mfs) |
|
{ |
|
unsigned int old_mfs; |
|
int rc = -EINVAL; |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
|
|
old_mfs = lport->mfs; |
|
|
|
if (mfs >= FC_MIN_MAX_FRAME) { |
|
mfs &= ~3; |
|
if (mfs > FC_MAX_FRAME) |
|
mfs = FC_MAX_FRAME; |
|
mfs -= sizeof(struct fc_frame_header); |
|
lport->mfs = mfs; |
|
rc = 0; |
|
} |
|
|
|
if (!rc && mfs < old_mfs) |
|
fc_lport_enter_reset(lport); |
|
|
|
mutex_unlock(&lport->lp_mutex); |
|
|
|
return rc; |
|
} |
|
EXPORT_SYMBOL(fc_set_mfs); |
|
|
|
/** |
|
* fc_lport_disc_callback() - Callback for discovery events |
|
* @lport: The local port receiving the event |
|
* @event: The discovery event |
|
*/ |
|
static void fc_lport_disc_callback(struct fc_lport *lport, |
|
enum fc_disc_event event) |
|
{ |
|
switch (event) { |
|
case DISC_EV_SUCCESS: |
|
FC_LPORT_DBG(lport, "Discovery succeeded\n"); |
|
break; |
|
case DISC_EV_FAILED: |
|
printk(KERN_ERR "host%d: libfc: " |
|
"Discovery failed for port (%6.6x)\n", |
|
lport->host->host_no, lport->port_id); |
|
mutex_lock(&lport->lp_mutex); |
|
fc_lport_enter_reset(lport); |
|
mutex_unlock(&lport->lp_mutex); |
|
break; |
|
case DISC_EV_NONE: |
|
WARN_ON(1); |
|
break; |
|
} |
|
} |
|
|
|
/** |
|
* fc_lport_enter_ready() - Enter the ready state and start discovery |
|
* @lport: The local port that is ready |
|
*/ |
|
static void fc_lport_enter_ready(struct fc_lport *lport) |
|
{ |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Entered READY from state %s\n", |
|
fc_lport_state(lport)); |
|
|
|
fc_lport_state_enter(lport, LPORT_ST_READY); |
|
if (lport->vport) |
|
fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE); |
|
fc_vports_linkchange(lport); |
|
|
|
if (!lport->ptp_rdata) |
|
lport->tt.disc_start(fc_lport_disc_callback, lport); |
|
} |
|
|
|
/** |
|
* fc_lport_set_port_id() - set the local port Port ID |
|
* @lport: The local port which will have its Port ID set. |
|
* @port_id: The new port ID. |
|
* @fp: The frame containing the incoming request, or NULL. |
|
*/ |
|
static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id, |
|
struct fc_frame *fp) |
|
{ |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
if (port_id) |
|
printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n", |
|
lport->host->host_no, port_id); |
|
|
|
lport->port_id = port_id; |
|
|
|
/* Update the fc_host */ |
|
fc_host_port_id(lport->host) = port_id; |
|
|
|
if (lport->tt.lport_set_port_id) |
|
lport->tt.lport_set_port_id(lport, port_id, fp); |
|
} |
|
|
|
/** |
|
* fc_lport_set_local_id() - set the local port Port ID for point-to-multipoint |
|
* @lport: The local port which will have its Port ID set. |
|
* @port_id: The new port ID. |
|
* |
|
* Called by the lower-level driver when transport sets the local port_id. |
|
* This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and |
|
* discovery to be skipped. |
|
*/ |
|
void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id) |
|
{ |
|
mutex_lock(&lport->lp_mutex); |
|
|
|
fc_lport_set_port_id(lport, port_id, NULL); |
|
|
|
switch (lport->state) { |
|
case LPORT_ST_RESET: |
|
case LPORT_ST_FLOGI: |
|
if (port_id) |
|
fc_lport_enter_ready(lport); |
|
break; |
|
default: |
|
break; |
|
} |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
EXPORT_SYMBOL(fc_lport_set_local_id); |
|
|
|
/** |
|
* fc_lport_recv_flogi_req() - Receive a FLOGI request |
|
* @lport: The local port that received the request |
|
* @rx_fp: The FLOGI frame |
|
* |
|
* A received FLOGI request indicates a point-to-point connection. |
|
* Accept it with the common service parameters indicating our N port. |
|
* Set up to do a PLOGI if we have the higher-number WWPN. |
|
*/ |
|
static void fc_lport_recv_flogi_req(struct fc_lport *lport, |
|
struct fc_frame *rx_fp) |
|
{ |
|
struct fc_frame *fp; |
|
struct fc_frame_header *fh; |
|
struct fc_els_flogi *flp; |
|
struct fc_els_flogi *new_flp; |
|
u64 remote_wwpn; |
|
u32 remote_fid; |
|
u32 local_fid; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n", |
|
fc_lport_state(lport)); |
|
|
|
remote_fid = fc_frame_sid(rx_fp); |
|
flp = fc_frame_payload_get(rx_fp, sizeof(*flp)); |
|
if (!flp) |
|
goto out; |
|
remote_wwpn = get_unaligned_be64(&flp->fl_wwpn); |
|
if (remote_wwpn == lport->wwpn) { |
|
printk(KERN_WARNING "host%d: libfc: Received FLOGI from port " |
|
"with same WWPN %16.16llx\n", |
|
lport->host->host_no, remote_wwpn); |
|
goto out; |
|
} |
|
FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn); |
|
|
|
/* |
|
* XXX what is the right thing to do for FIDs? |
|
* The originator might expect our S_ID to be 0xfffffe. |
|
* But if so, both of us could end up with the same FID. |
|
*/ |
|
local_fid = FC_LOCAL_PTP_FID_LO; |
|
if (remote_wwpn < lport->wwpn) { |
|
local_fid = FC_LOCAL_PTP_FID_HI; |
|
if (!remote_fid || remote_fid == local_fid) |
|
remote_fid = FC_LOCAL_PTP_FID_LO; |
|
} else if (!remote_fid) { |
|
remote_fid = FC_LOCAL_PTP_FID_HI; |
|
} |
|
|
|
fc_lport_set_port_id(lport, local_fid, rx_fp); |
|
|
|
fp = fc_frame_alloc(lport, sizeof(*flp)); |
|
if (fp) { |
|
new_flp = fc_frame_payload_get(fp, sizeof(*flp)); |
|
fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI); |
|
new_flp->fl_cmd = (u8) ELS_LS_ACC; |
|
|
|
/* |
|
* Send the response. If this fails, the originator should |
|
* repeat the sequence. |
|
*/ |
|
fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0); |
|
fh = fc_frame_header_get(fp); |
|
hton24(fh->fh_s_id, local_fid); |
|
hton24(fh->fh_d_id, remote_fid); |
|
lport->tt.frame_send(lport, fp); |
|
|
|
} else { |
|
fc_lport_error(lport, fp); |
|
} |
|
fc_lport_ptp_setup(lport, remote_fid, remote_wwpn, |
|
get_unaligned_be64(&flp->fl_wwnn)); |
|
out: |
|
fc_frame_free(rx_fp); |
|
} |
|
|
|
/** |
|
* fc_lport_recv_els_req() - The generic lport ELS request handler |
|
* @lport: The local port that received the request |
|
* @fp: The request frame |
|
* |
|
* This function will see if the lport handles the request or |
|
* if an rport should handle the request. |
|
* |
|
* Locking Note: This function should not be called with the lport |
|
* lock held because it will grab the lock. |
|
*/ |
|
static void fc_lport_recv_els_req(struct fc_lport *lport, |
|
struct fc_frame *fp) |
|
{ |
|
mutex_lock(&lport->lp_mutex); |
|
|
|
/* |
|
* Handle special ELS cases like FLOGI, LOGO, and |
|
* RSCN here. These don't require a session. |
|
* Even if we had a session, it might not be ready. |
|
*/ |
|
if (!lport->link_up) |
|
fc_frame_free(fp); |
|
else { |
|
/* |
|
* Check opcode. |
|
*/ |
|
switch (fc_frame_payload_op(fp)) { |
|
case ELS_FLOGI: |
|
if (!lport->point_to_multipoint) |
|
fc_lport_recv_flogi_req(lport, fp); |
|
else |
|
fc_rport_recv_req(lport, fp); |
|
break; |
|
case ELS_LOGO: |
|
if (fc_frame_sid(fp) == FC_FID_FLOGI) |
|
fc_lport_recv_logo_req(lport, fp); |
|
else |
|
fc_rport_recv_req(lport, fp); |
|
break; |
|
case ELS_RSCN: |
|
lport->tt.disc_recv_req(lport, fp); |
|
break; |
|
case ELS_ECHO: |
|
fc_lport_recv_echo_req(lport, fp); |
|
break; |
|
case ELS_RLIR: |
|
fc_lport_recv_rlir_req(lport, fp); |
|
break; |
|
case ELS_RNID: |
|
fc_lport_recv_rnid_req(lport, fp); |
|
break; |
|
default: |
|
fc_rport_recv_req(lport, fp); |
|
break; |
|
} |
|
} |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
|
|
static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len, |
|
const struct fc_els_spp *spp_in, |
|
struct fc_els_spp *spp_out) |
|
{ |
|
return FC_SPP_RESP_INVL; |
|
} |
|
|
|
struct fc4_prov fc_lport_els_prov = { |
|
.prli = fc_lport_els_prli, |
|
.recv = fc_lport_recv_els_req, |
|
}; |
|
|
|
/** |
|
* fc_lport_recv() - The generic lport request handler |
|
* @lport: The lport that received the request |
|
* @fp: The frame the request is in |
|
* |
|
* Locking Note: This function should not be called with the lport |
|
* lock held because it may grab the lock. |
|
*/ |
|
void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp) |
|
{ |
|
struct fc_frame_header *fh = fc_frame_header_get(fp); |
|
struct fc_seq *sp = fr_seq(fp); |
|
struct fc4_prov *prov; |
|
|
|
/* |
|
* Use RCU read lock and module_lock to be sure module doesn't |
|
* deregister and get unloaded while we're calling it. |
|
* try_module_get() is inlined and accepts a NULL parameter. |
|
* Only ELSes and FCP target ops should come through here. |
|
* The locking is unfortunate, and a better scheme is being sought. |
|
*/ |
|
|
|
rcu_read_lock(); |
|
if (fh->fh_type >= FC_FC4_PROV_SIZE) |
|
goto drop; |
|
prov = rcu_dereference(fc_passive_prov[fh->fh_type]); |
|
if (!prov || !try_module_get(prov->module)) |
|
goto drop; |
|
rcu_read_unlock(); |
|
prov->recv(lport, fp); |
|
module_put(prov->module); |
|
return; |
|
drop: |
|
rcu_read_unlock(); |
|
FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type); |
|
fc_frame_free(fp); |
|
if (sp) |
|
fc_exch_done(sp); |
|
} |
|
EXPORT_SYMBOL(fc_lport_recv); |
|
|
|
/** |
|
* fc_lport_reset() - Reset a local port |
|
* @lport: The local port which should be reset |
|
* |
|
* Locking Note: This functions should not be called with the |
|
* lport lock held. |
|
*/ |
|
int fc_lport_reset(struct fc_lport *lport) |
|
{ |
|
cancel_delayed_work_sync(&lport->retry_work); |
|
mutex_lock(&lport->lp_mutex); |
|
fc_lport_enter_reset(lport); |
|
mutex_unlock(&lport->lp_mutex); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(fc_lport_reset); |
|
|
|
/** |
|
* fc_lport_reset_locked() - Reset the local port w/ the lport lock held |
|
* @lport: The local port to be reset |
|
*/ |
|
static void fc_lport_reset_locked(struct fc_lport *lport) |
|
{ |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
if (lport->dns_rdata) { |
|
fc_rport_logoff(lport->dns_rdata); |
|
lport->dns_rdata = NULL; |
|
} |
|
|
|
if (lport->ptp_rdata) { |
|
fc_rport_logoff(lport->ptp_rdata); |
|
kref_put(&lport->ptp_rdata->kref, fc_rport_destroy); |
|
lport->ptp_rdata = NULL; |
|
} |
|
|
|
lport->tt.disc_stop(lport); |
|
|
|
lport->tt.exch_mgr_reset(lport, 0, 0); |
|
fc_host_fabric_name(lport->host) = 0; |
|
|
|
if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up)) |
|
fc_lport_set_port_id(lport, 0, NULL); |
|
} |
|
|
|
/** |
|
* fc_lport_enter_reset() - Reset the local port |
|
* @lport: The local port to be reset |
|
*/ |
|
static void fc_lport_enter_reset(struct fc_lport *lport) |
|
{ |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Entered RESET state from %s state\n", |
|
fc_lport_state(lport)); |
|
|
|
if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO) |
|
return; |
|
|
|
if (lport->vport) { |
|
if (lport->link_up) |
|
fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING); |
|
else |
|
fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN); |
|
} |
|
fc_lport_state_enter(lport, LPORT_ST_RESET); |
|
fc_host_post_event(lport->host, fc_get_event_number(), |
|
FCH_EVT_LIPRESET, 0); |
|
fc_vports_linkchange(lport); |
|
fc_lport_reset_locked(lport); |
|
if (lport->link_up) |
|
fc_lport_enter_flogi(lport); |
|
} |
|
|
|
/** |
|
* fc_lport_enter_disabled() - Disable the local port |
|
* @lport: The local port to be reset |
|
*/ |
|
static void fc_lport_enter_disabled(struct fc_lport *lport) |
|
{ |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Entered disabled state from %s state\n", |
|
fc_lport_state(lport)); |
|
|
|
fc_lport_state_enter(lport, LPORT_ST_DISABLED); |
|
fc_vports_linkchange(lport); |
|
fc_lport_reset_locked(lport); |
|
} |
|
|
|
/** |
|
* fc_lport_error() - Handler for any errors |
|
* @lport: The local port that the error was on |
|
* @fp: The error code encoded in a frame pointer |
|
* |
|
* If the error was caused by a resource allocation failure |
|
* then wait for half a second and retry, otherwise retry |
|
* after the e_d_tov time. |
|
*/ |
|
static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp) |
|
{ |
|
unsigned long delay = 0; |
|
FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n", |
|
IS_ERR(fp) ? -PTR_ERR(fp) : 0, fc_lport_state(lport), |
|
lport->retry_count); |
|
|
|
if (PTR_ERR(fp) == -FC_EX_CLOSED) |
|
return; |
|
|
|
/* |
|
* Memory allocation failure, or the exchange timed out |
|
* or we received LS_RJT. |
|
* Retry after delay |
|
*/ |
|
if (lport->retry_count < lport->max_retry_count) { |
|
lport->retry_count++; |
|
if (!fp) |
|
delay = msecs_to_jiffies(500); |
|
else |
|
delay = msecs_to_jiffies(lport->e_d_tov); |
|
|
|
schedule_delayed_work(&lport->retry_work, delay); |
|
} else |
|
fc_lport_enter_reset(lport); |
|
} |
|
|
|
/** |
|
* fc_lport_ns_resp() - Handle response to a name server |
|
* registration exchange |
|
* @sp: current sequence in exchange |
|
* @fp: response frame |
|
* @lp_arg: Fibre Channel host port instance |
|
* |
|
* Locking Note: This function will be called without the lport lock |
|
* held, but it will lock, call an _enter_* function or fc_lport_error() |
|
* and then unlock the lport. |
|
*/ |
|
static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp, |
|
void *lp_arg) |
|
{ |
|
struct fc_lport *lport = lp_arg; |
|
struct fc_frame_header *fh; |
|
struct fc_ct_hdr *ct; |
|
|
|
FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp)); |
|
|
|
if (fp == ERR_PTR(-FC_EX_CLOSED)) |
|
return; |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
|
|
if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) { |
|
FC_LPORT_DBG(lport, "Received a name server response, " |
|
"but in state %s\n", fc_lport_state(lport)); |
|
if (IS_ERR(fp)) |
|
goto err; |
|
goto out; |
|
} |
|
|
|
if (IS_ERR(fp)) { |
|
fc_lport_error(lport, fp); |
|
goto err; |
|
} |
|
|
|
fh = fc_frame_header_get(fp); |
|
ct = fc_frame_payload_get(fp, sizeof(*ct)); |
|
|
|
if (fh && ct && fh->fh_type == FC_TYPE_CT && |
|
ct->ct_fs_type == FC_FST_DIR && |
|
ct->ct_fs_subtype == FC_NS_SUBTYPE && |
|
ntohs(ct->ct_cmd) == FC_FS_ACC) |
|
switch (lport->state) { |
|
case LPORT_ST_RNN_ID: |
|
fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN); |
|
break; |
|
case LPORT_ST_RSNN_NN: |
|
fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID); |
|
break; |
|
case LPORT_ST_RSPN_ID: |
|
fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); |
|
break; |
|
case LPORT_ST_RFT_ID: |
|
fc_lport_enter_ns(lport, LPORT_ST_RFF_ID); |
|
break; |
|
case LPORT_ST_RFF_ID: |
|
if (lport->fdmi_enabled) |
|
fc_lport_enter_fdmi(lport); |
|
else |
|
fc_lport_enter_scr(lport); |
|
break; |
|
default: |
|
/* should have already been caught by state checks */ |
|
break; |
|
} |
|
else |
|
fc_lport_error(lport, fp); |
|
out: |
|
fc_frame_free(fp); |
|
err: |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
|
|
/** |
|
* fc_lport_ms_resp() - Handle response to a management server |
|
* exchange |
|
* @sp: current sequence in exchange |
|
* @fp: response frame |
|
* @lp_arg: Fibre Channel host port instance |
|
* |
|
* Locking Note: This function will be called without the lport lock |
|
* held, but it will lock, call an _enter_* function or fc_lport_error() |
|
* and then unlock the lport. |
|
*/ |
|
static void fc_lport_ms_resp(struct fc_seq *sp, struct fc_frame *fp, |
|
void *lp_arg) |
|
{ |
|
struct fc_lport *lport = lp_arg; |
|
struct fc_frame_header *fh; |
|
struct fc_ct_hdr *ct; |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host); |
|
FC_LPORT_DBG(lport, "Received a ms %s\n", fc_els_resp_type(fp)); |
|
|
|
if (fp == ERR_PTR(-FC_EX_CLOSED)) |
|
return; |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
|
|
if (lport->state < LPORT_ST_RHBA || lport->state > LPORT_ST_DPRT) { |
|
FC_LPORT_DBG(lport, "Received a management server response, " |
|
"but in state %s\n", fc_lport_state(lport)); |
|
if (IS_ERR(fp)) |
|
goto err; |
|
goto out; |
|
} |
|
|
|
if (IS_ERR(fp)) { |
|
fc_lport_error(lport, fp); |
|
goto err; |
|
} |
|
|
|
fh = fc_frame_header_get(fp); |
|
ct = fc_frame_payload_get(fp, sizeof(*ct)); |
|
|
|
if (fh && ct && fh->fh_type == FC_TYPE_CT && |
|
ct->ct_fs_type == FC_FST_MGMT && |
|
ct->ct_fs_subtype == FC_FDMI_SUBTYPE) { |
|
FC_LPORT_DBG(lport, "Received a management server response, " |
|
"reason=%d explain=%d\n", |
|
ct->ct_reason, |
|
ct->ct_explan); |
|
|
|
switch (lport->state) { |
|
case LPORT_ST_RHBA: |
|
if ((ntohs(ct->ct_cmd) == FC_FS_RJT) && fc_host->fdmi_version == FDMI_V2) { |
|
FC_LPORT_DBG(lport, "Error for FDMI-V2, fall back to FDMI-V1\n"); |
|
fc_host->fdmi_version = FDMI_V1; |
|
|
|
fc_lport_enter_ms(lport, LPORT_ST_RHBA); |
|
|
|
} else if (ntohs(ct->ct_cmd) == FC_FS_ACC) |
|
fc_lport_enter_ms(lport, LPORT_ST_RPA); |
|
else /* Error Skip RPA */ |
|
fc_lport_enter_scr(lport); |
|
break; |
|
case LPORT_ST_RPA: |
|
fc_lport_enter_scr(lport); |
|
break; |
|
case LPORT_ST_DPRT: |
|
fc_lport_enter_ms(lport, LPORT_ST_RHBA); |
|
break; |
|
case LPORT_ST_DHBA: |
|
fc_lport_enter_ms(lport, LPORT_ST_DPRT); |
|
break; |
|
default: |
|
/* should have already been caught by state checks */ |
|
break; |
|
} |
|
} else { |
|
/* Invalid Frame? */ |
|
fc_lport_error(lport, fp); |
|
} |
|
out: |
|
fc_frame_free(fp); |
|
err: |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
|
|
/** |
|
* fc_lport_scr_resp() - Handle response to State Change Register (SCR) request |
|
* @sp: current sequence in SCR exchange |
|
* @fp: response frame |
|
* @lp_arg: Fibre Channel lport port instance that sent the registration request |
|
* |
|
* Locking Note: This function will be called without the lport lock |
|
* held, but it will lock, call an _enter_* function or fc_lport_error |
|
* and then unlock the lport. |
|
*/ |
|
static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp, |
|
void *lp_arg) |
|
{ |
|
struct fc_lport *lport = lp_arg; |
|
u8 op; |
|
|
|
FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp)); |
|
|
|
if (fp == ERR_PTR(-FC_EX_CLOSED)) |
|
return; |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
|
|
if (lport->state != LPORT_ST_SCR) { |
|
FC_LPORT_DBG(lport, "Received a SCR response, but in state " |
|
"%s\n", fc_lport_state(lport)); |
|
if (IS_ERR(fp)) |
|
goto err; |
|
goto out; |
|
} |
|
|
|
if (IS_ERR(fp)) { |
|
fc_lport_error(lport, fp); |
|
goto err; |
|
} |
|
|
|
op = fc_frame_payload_op(fp); |
|
if (op == ELS_LS_ACC) |
|
fc_lport_enter_ready(lport); |
|
else |
|
fc_lport_error(lport, fp); |
|
|
|
out: |
|
fc_frame_free(fp); |
|
err: |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
|
|
/** |
|
* fc_lport_enter_scr() - Send a SCR (State Change Register) request |
|
* @lport: The local port to register for state changes |
|
*/ |
|
static void fc_lport_enter_scr(struct fc_lport *lport) |
|
{ |
|
struct fc_frame *fp; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Entered SCR state from %s state\n", |
|
fc_lport_state(lport)); |
|
|
|
fc_lport_state_enter(lport, LPORT_ST_SCR); |
|
|
|
fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr)); |
|
if (!fp) { |
|
fc_lport_error(lport, fp); |
|
return; |
|
} |
|
|
|
if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR, |
|
fc_lport_scr_resp, lport, |
|
2 * lport->r_a_tov)) |
|
fc_lport_error(lport, NULL); |
|
} |
|
|
|
/** |
|
* fc_lport_enter_ns() - register some object with the name server |
|
* @lport: Fibre Channel local port to register |
|
* @state: Local port state |
|
*/ |
|
static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state) |
|
{ |
|
struct fc_frame *fp; |
|
enum fc_ns_req cmd; |
|
int size = sizeof(struct fc_ct_hdr); |
|
size_t len; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Entered %s state from %s state\n", |
|
fc_lport_state_names[state], |
|
fc_lport_state(lport)); |
|
|
|
fc_lport_state_enter(lport, state); |
|
|
|
switch (state) { |
|
case LPORT_ST_RNN_ID: |
|
cmd = FC_NS_RNN_ID; |
|
size += sizeof(struct fc_ns_rn_id); |
|
break; |
|
case LPORT_ST_RSNN_NN: |
|
len = strnlen(fc_host_symbolic_name(lport->host), 255); |
|
/* if there is no symbolic name, skip to RFT_ID */ |
|
if (!len) |
|
return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); |
|
cmd = FC_NS_RSNN_NN; |
|
size += sizeof(struct fc_ns_rsnn) + len; |
|
break; |
|
case LPORT_ST_RSPN_ID: |
|
len = strnlen(fc_host_symbolic_name(lport->host), 255); |
|
/* if there is no symbolic name, skip to RFT_ID */ |
|
if (!len) |
|
return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID); |
|
cmd = FC_NS_RSPN_ID; |
|
size += sizeof(struct fc_ns_rspn) + len; |
|
break; |
|
case LPORT_ST_RFT_ID: |
|
cmd = FC_NS_RFT_ID; |
|
size += sizeof(struct fc_ns_rft); |
|
break; |
|
case LPORT_ST_RFF_ID: |
|
cmd = FC_NS_RFF_ID; |
|
size += sizeof(struct fc_ns_rff_id); |
|
break; |
|
default: |
|
fc_lport_error(lport, NULL); |
|
return; |
|
} |
|
|
|
fp = fc_frame_alloc(lport, size); |
|
if (!fp) { |
|
fc_lport_error(lport, fp); |
|
return; |
|
} |
|
|
|
if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd, |
|
fc_lport_ns_resp, |
|
lport, 3 * lport->r_a_tov)) |
|
fc_lport_error(lport, fp); |
|
} |
|
|
|
static struct fc_rport_operations fc_lport_rport_ops = { |
|
.event_callback = fc_lport_rport_callback, |
|
}; |
|
|
|
/** |
|
* fc_lport_enter_dns() - Create a fc_rport for the name server |
|
* @lport: The local port requesting a remote port for the name server |
|
*/ |
|
static void fc_lport_enter_dns(struct fc_lport *lport) |
|
{ |
|
struct fc_rport_priv *rdata; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Entered DNS state from %s state\n", |
|
fc_lport_state(lport)); |
|
|
|
fc_lport_state_enter(lport, LPORT_ST_DNS); |
|
|
|
mutex_lock(&lport->disc.disc_mutex); |
|
rdata = fc_rport_create(lport, FC_FID_DIR_SERV); |
|
mutex_unlock(&lport->disc.disc_mutex); |
|
if (!rdata) |
|
goto err; |
|
|
|
rdata->ops = &fc_lport_rport_ops; |
|
fc_rport_login(rdata); |
|
return; |
|
|
|
err: |
|
fc_lport_error(lport, NULL); |
|
} |
|
|
|
/** |
|
* fc_lport_enter_ms() - management server commands |
|
* @lport: Fibre Channel local port to register |
|
* @state: Local port state |
|
*/ |
|
static void fc_lport_enter_ms(struct fc_lport *lport, enum fc_lport_state state) |
|
{ |
|
struct fc_frame *fp; |
|
enum fc_fdmi_req cmd; |
|
int size = sizeof(struct fc_ct_hdr); |
|
size_t len; |
|
int numattrs; |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host); |
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Entered %s state from %s state\n", |
|
fc_lport_state_names[state], |
|
fc_lport_state(lport)); |
|
|
|
fc_lport_state_enter(lport, state); |
|
|
|
switch (state) { |
|
case LPORT_ST_RHBA: |
|
cmd = FC_FDMI_RHBA; |
|
/* Number of HBA Attributes */ |
|
numattrs = 11; |
|
len = sizeof(struct fc_fdmi_rhba); |
|
len -= sizeof(struct fc_fdmi_attr_entry); |
|
|
|
len += FC_FDMI_HBA_ATTR_NODENAME_LEN; |
|
len += FC_FDMI_HBA_ATTR_MANUFACTURER_LEN; |
|
len += FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN; |
|
len += FC_FDMI_HBA_ATTR_MODEL_LEN; |
|
len += FC_FDMI_HBA_ATTR_MODELDESCR_LEN; |
|
len += FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN; |
|
len += FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN; |
|
len += FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN; |
|
len += FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN; |
|
len += FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN; |
|
len += FC_FDMI_HBA_ATTR_MAXCTPAYLOAD_LEN; |
|
|
|
|
|
if (fc_host->fdmi_version == FDMI_V2) { |
|
numattrs += 7; |
|
len += FC_FDMI_HBA_ATTR_NODESYMBLNAME_LEN; |
|
len += FC_FDMI_HBA_ATTR_VENDORSPECIFICINFO_LEN; |
|
len += FC_FDMI_HBA_ATTR_NUMBEROFPORTS_LEN; |
|
len += FC_FDMI_HBA_ATTR_FABRICNAME_LEN; |
|
len += FC_FDMI_HBA_ATTR_BIOSVERSION_LEN; |
|
len += FC_FDMI_HBA_ATTR_BIOSSTATE_LEN; |
|
len += FC_FDMI_HBA_ATTR_VENDORIDENTIFIER_LEN; |
|
} |
|
|
|
len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN); |
|
|
|
size += len; |
|
break; |
|
case LPORT_ST_RPA: |
|
cmd = FC_FDMI_RPA; |
|
/* Number of Port Attributes */ |
|
numattrs = 6; |
|
len = sizeof(struct fc_fdmi_rpa); |
|
len -= sizeof(struct fc_fdmi_attr_entry); |
|
len += FC_FDMI_PORT_ATTR_FC4TYPES_LEN; |
|
len += FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN; |
|
len += FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN; |
|
len += FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN; |
|
len += FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN; |
|
len += FC_FDMI_PORT_ATTR_HOSTNAME_LEN; |
|
|
|
if (fc_host->fdmi_version == FDMI_V2) { |
|
numattrs += 10; |
|
len += FC_FDMI_PORT_ATTR_NODENAME_LEN; |
|
len += FC_FDMI_PORT_ATTR_PORTNAME_LEN; |
|
len += FC_FDMI_PORT_ATTR_SYMBOLICNAME_LEN; |
|
len += FC_FDMI_PORT_ATTR_PORTTYPE_LEN; |
|
len += FC_FDMI_PORT_ATTR_SUPPORTEDCLASSSRVC_LEN; |
|
len += FC_FDMI_PORT_ATTR_FABRICNAME_LEN; |
|
len += FC_FDMI_PORT_ATTR_CURRENTFC4TYPE_LEN; |
|
len += FC_FDMI_PORT_ATTR_PORTSTATE_LEN; |
|
len += FC_FDMI_PORT_ATTR_DISCOVEREDPORTS_LEN; |
|
len += FC_FDMI_PORT_ATTR_PORTID_LEN; |
|
} |
|
|
|
len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN); |
|
|
|
size += len; |
|
break; |
|
case LPORT_ST_DPRT: |
|
cmd = FC_FDMI_DPRT; |
|
len = sizeof(struct fc_fdmi_dprt); |
|
size += len; |
|
break; |
|
case LPORT_ST_DHBA: |
|
cmd = FC_FDMI_DHBA; |
|
len = sizeof(struct fc_fdmi_dhba); |
|
size += len; |
|
break; |
|
default: |
|
fc_lport_error(lport, NULL); |
|
return; |
|
} |
|
|
|
FC_LPORT_DBG(lport, "Cmd=0x%x Len %d size %d\n", |
|
cmd, (int)len, size); |
|
fp = fc_frame_alloc(lport, size); |
|
if (!fp) { |
|
fc_lport_error(lport, fp); |
|
return; |
|
} |
|
|
|
if (!lport->tt.elsct_send(lport, FC_FID_MGMT_SERV, fp, cmd, |
|
fc_lport_ms_resp, |
|
lport, 3 * lport->r_a_tov)) |
|
fc_lport_error(lport, fp); |
|
} |
|
|
|
/** |
|
* fc_lport_enter_fdmi() - Create a fc_rport for the management server |
|
* @lport: The local port requesting a remote port for the management server |
|
*/ |
|
static void fc_lport_enter_fdmi(struct fc_lport *lport) |
|
{ |
|
struct fc_rport_priv *rdata; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Entered FDMI state from %s state\n", |
|
fc_lport_state(lport)); |
|
|
|
fc_lport_state_enter(lport, LPORT_ST_FDMI); |
|
|
|
mutex_lock(&lport->disc.disc_mutex); |
|
rdata = fc_rport_create(lport, FC_FID_MGMT_SERV); |
|
mutex_unlock(&lport->disc.disc_mutex); |
|
if (!rdata) |
|
goto err; |
|
|
|
rdata->ops = &fc_lport_rport_ops; |
|
fc_rport_login(rdata); |
|
return; |
|
|
|
err: |
|
fc_lport_error(lport, NULL); |
|
} |
|
|
|
/** |
|
* fc_lport_timeout() - Handler for the retry_work timer |
|
* @work: The work struct of the local port |
|
*/ |
|
static void fc_lport_timeout(struct work_struct *work) |
|
{ |
|
struct fc_lport *lport = |
|
container_of(work, struct fc_lport, |
|
retry_work.work); |
|
struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host); |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
|
|
switch (lport->state) { |
|
case LPORT_ST_DISABLED: |
|
break; |
|
case LPORT_ST_READY: |
|
break; |
|
case LPORT_ST_RESET: |
|
break; |
|
case LPORT_ST_FLOGI: |
|
fc_lport_enter_flogi(lport); |
|
break; |
|
case LPORT_ST_DNS: |
|
fc_lport_enter_dns(lport); |
|
break; |
|
case LPORT_ST_RNN_ID: |
|
case LPORT_ST_RSNN_NN: |
|
case LPORT_ST_RSPN_ID: |
|
case LPORT_ST_RFT_ID: |
|
case LPORT_ST_RFF_ID: |
|
fc_lport_enter_ns(lport, lport->state); |
|
break; |
|
case LPORT_ST_FDMI: |
|
fc_lport_enter_fdmi(lport); |
|
break; |
|
case LPORT_ST_RHBA: |
|
if (fc_host->fdmi_version == FDMI_V2) { |
|
FC_LPORT_DBG(lport, "timeout for FDMI-V2 RHBA,fall back to FDMI-V1\n"); |
|
fc_host->fdmi_version = FDMI_V1; |
|
fc_lport_enter_ms(lport, LPORT_ST_RHBA); |
|
break; |
|
} |
|
fallthrough; |
|
case LPORT_ST_RPA: |
|
case LPORT_ST_DHBA: |
|
case LPORT_ST_DPRT: |
|
FC_LPORT_DBG(lport, "Skipping lport state %s to SCR\n", |
|
fc_lport_state(lport)); |
|
fallthrough; |
|
case LPORT_ST_SCR: |
|
fc_lport_enter_scr(lport); |
|
break; |
|
case LPORT_ST_LOGO: |
|
fc_lport_enter_logo(lport); |
|
break; |
|
} |
|
|
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
|
|
/** |
|
* fc_lport_logo_resp() - Handle response to LOGO request |
|
* @sp: The sequence that the LOGO was on |
|
* @fp: The LOGO frame |
|
* @lp_arg: The lport port that received the LOGO request |
|
* |
|
* Locking Note: This function will be called without the lport lock |
|
* held, but it will lock, call an _enter_* function or fc_lport_error() |
|
* and then unlock the lport. |
|
*/ |
|
void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, |
|
void *lp_arg) |
|
{ |
|
struct fc_lport *lport = lp_arg; |
|
u8 op; |
|
|
|
FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp)); |
|
|
|
if (fp == ERR_PTR(-FC_EX_CLOSED)) |
|
return; |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
|
|
if (lport->state != LPORT_ST_LOGO) { |
|
FC_LPORT_DBG(lport, "Received a LOGO response, but in state " |
|
"%s\n", fc_lport_state(lport)); |
|
if (IS_ERR(fp)) |
|
goto err; |
|
goto out; |
|
} |
|
|
|
if (IS_ERR(fp)) { |
|
fc_lport_error(lport, fp); |
|
goto err; |
|
} |
|
|
|
op = fc_frame_payload_op(fp); |
|
if (op == ELS_LS_ACC) |
|
fc_lport_enter_disabled(lport); |
|
else |
|
fc_lport_error(lport, fp); |
|
|
|
out: |
|
fc_frame_free(fp); |
|
err: |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
EXPORT_SYMBOL(fc_lport_logo_resp); |
|
|
|
/** |
|
* fc_lport_enter_logo() - Logout of the fabric |
|
* @lport: The local port to be logged out |
|
*/ |
|
static void fc_lport_enter_logo(struct fc_lport *lport) |
|
{ |
|
struct fc_frame *fp; |
|
struct fc_els_logo *logo; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n", |
|
fc_lport_state(lport)); |
|
|
|
fc_lport_state_enter(lport, LPORT_ST_LOGO); |
|
fc_vports_linkchange(lport); |
|
|
|
fp = fc_frame_alloc(lport, sizeof(*logo)); |
|
if (!fp) { |
|
fc_lport_error(lport, fp); |
|
return; |
|
} |
|
|
|
if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO, |
|
fc_lport_logo_resp, lport, |
|
2 * lport->r_a_tov)) |
|
fc_lport_error(lport, NULL); |
|
} |
|
|
|
/** |
|
* fc_lport_flogi_resp() - Handle response to FLOGI request |
|
* @sp: The sequence that the FLOGI was on |
|
* @fp: The FLOGI response frame |
|
* @lp_arg: The lport port that received the FLOGI response |
|
* |
|
* Locking Note: This function will be called without the lport lock |
|
* held, but it will lock, call an _enter_* function or fc_lport_error() |
|
* and then unlock the lport. |
|
*/ |
|
void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
|
void *lp_arg) |
|
{ |
|
struct fc_lport *lport = lp_arg; |
|
struct fc_frame_header *fh; |
|
struct fc_els_flogi *flp; |
|
u32 did; |
|
u16 csp_flags; |
|
unsigned int r_a_tov; |
|
unsigned int e_d_tov; |
|
u16 mfs; |
|
|
|
FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp)); |
|
|
|
if (fp == ERR_PTR(-FC_EX_CLOSED)) |
|
return; |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
|
|
if (lport->state != LPORT_ST_FLOGI) { |
|
FC_LPORT_DBG(lport, "Received a FLOGI response, but in state " |
|
"%s\n", fc_lport_state(lport)); |
|
if (IS_ERR(fp)) |
|
goto err; |
|
goto out; |
|
} |
|
|
|
if (IS_ERR(fp)) { |
|
fc_lport_error(lport, fp); |
|
goto err; |
|
} |
|
|
|
fh = fc_frame_header_get(fp); |
|
did = fc_frame_did(fp); |
|
if (fh->fh_r_ctl != FC_RCTL_ELS_REP || did == 0 || |
|
fc_frame_payload_op(fp) != ELS_LS_ACC) { |
|
FC_LPORT_DBG(lport, "FLOGI not accepted or bad response\n"); |
|
fc_lport_error(lport, fp); |
|
goto out; |
|
} |
|
|
|
flp = fc_frame_payload_get(fp, sizeof(*flp)); |
|
if (!flp) { |
|
FC_LPORT_DBG(lport, "FLOGI bad response\n"); |
|
fc_lport_error(lport, fp); |
|
goto out; |
|
} |
|
|
|
mfs = ntohs(flp->fl_csp.sp_bb_data) & |
|
FC_SP_BB_DATA_MASK; |
|
|
|
if (mfs < FC_SP_MIN_MAX_PAYLOAD || mfs > FC_SP_MAX_MAX_PAYLOAD) { |
|
FC_LPORT_DBG(lport, "FLOGI bad mfs:%hu response, " |
|
"lport->mfs:%u\n", mfs, lport->mfs); |
|
fc_lport_error(lport, fp); |
|
goto out; |
|
} |
|
|
|
if (mfs <= lport->mfs) { |
|
lport->mfs = mfs; |
|
fc_host_maxframe_size(lport->host) = mfs; |
|
} |
|
|
|
csp_flags = ntohs(flp->fl_csp.sp_features); |
|
r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov); |
|
e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov); |
|
if (csp_flags & FC_SP_FT_EDTR) |
|
e_d_tov /= 1000000; |
|
|
|
lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC); |
|
|
|
if ((csp_flags & FC_SP_FT_FPORT) == 0) { |
|
if (e_d_tov > lport->e_d_tov) |
|
lport->e_d_tov = e_d_tov; |
|
lport->r_a_tov = 2 * lport->e_d_tov; |
|
fc_lport_set_port_id(lport, did, fp); |
|
printk(KERN_INFO "host%d: libfc: " |
|
"Port (%6.6x) entered " |
|
"point-to-point mode\n", |
|
lport->host->host_no, did); |
|
fc_lport_ptp_setup(lport, fc_frame_sid(fp), |
|
get_unaligned_be64( |
|
&flp->fl_wwpn), |
|
get_unaligned_be64( |
|
&flp->fl_wwnn)); |
|
} else { |
|
if (e_d_tov > lport->e_d_tov) |
|
lport->e_d_tov = e_d_tov; |
|
if (r_a_tov > lport->r_a_tov) |
|
lport->r_a_tov = r_a_tov; |
|
fc_host_fabric_name(lport->host) = |
|
get_unaligned_be64(&flp->fl_wwnn); |
|
fc_lport_set_port_id(lport, did, fp); |
|
fc_lport_enter_dns(lport); |
|
} |
|
|
|
out: |
|
fc_frame_free(fp); |
|
err: |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
EXPORT_SYMBOL(fc_lport_flogi_resp); |
|
|
|
/** |
|
* fc_lport_enter_flogi() - Send a FLOGI request to the fabric manager |
|
* @lport: Fibre Channel local port to be logged in to the fabric |
|
*/ |
|
static void fc_lport_enter_flogi(struct fc_lport *lport) |
|
{ |
|
struct fc_frame *fp; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n", |
|
fc_lport_state(lport)); |
|
|
|
fc_lport_state_enter(lport, LPORT_ST_FLOGI); |
|
|
|
if (lport->point_to_multipoint) { |
|
if (lport->port_id) |
|
fc_lport_enter_ready(lport); |
|
return; |
|
} |
|
|
|
fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
|
if (!fp) |
|
return fc_lport_error(lport, fp); |
|
|
|
if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, |
|
lport->vport ? ELS_FDISC : ELS_FLOGI, |
|
fc_lport_flogi_resp, lport, |
|
lport->vport ? 2 * lport->r_a_tov : |
|
lport->e_d_tov)) |
|
fc_lport_error(lport, NULL); |
|
} |
|
|
|
/** |
|
* fc_lport_config() - Configure a fc_lport |
|
* @lport: The local port to be configured |
|
*/ |
|
int fc_lport_config(struct fc_lport *lport) |
|
{ |
|
INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout); |
|
mutex_init(&lport->lp_mutex); |
|
|
|
fc_lport_state_enter(lport, LPORT_ST_DISABLED); |
|
|
|
fc_lport_add_fc4_type(lport, FC_TYPE_FCP); |
|
fc_lport_add_fc4_type(lport, FC_TYPE_CT); |
|
fc_fc4_conf_lport_params(lport, FC_TYPE_FCP); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(fc_lport_config); |
|
|
|
/** |
|
* fc_lport_init() - Initialize the lport layer for a local port |
|
* @lport: The local port to initialize the exchange layer for |
|
*/ |
|
int fc_lport_init(struct fc_lport *lport) |
|
{ |
|
struct fc_host_attrs *fc_host; |
|
|
|
fc_host = shost_to_fc_host(lport->host); |
|
|
|
/* Set FDMI version to FDMI-2 specification*/ |
|
fc_host->fdmi_version = FDMI_V2; |
|
|
|
fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT; |
|
fc_host_node_name(lport->host) = lport->wwnn; |
|
fc_host_port_name(lport->host) = lport->wwpn; |
|
fc_host_supported_classes(lport->host) = FC_COS_CLASS3; |
|
memset(fc_host_supported_fc4s(lport->host), 0, |
|
sizeof(fc_host_supported_fc4s(lport->host))); |
|
fc_host_supported_fc4s(lport->host)[2] = 1; |
|
fc_host_supported_fc4s(lport->host)[7] = 1; |
|
fc_host_num_discovered_ports(lport->host) = 4; |
|
|
|
/* This value is also unchanging */ |
|
memset(fc_host_active_fc4s(lport->host), 0, |
|
sizeof(fc_host_active_fc4s(lport->host))); |
|
fc_host_active_fc4s(lport->host)[2] = 1; |
|
fc_host_active_fc4s(lport->host)[7] = 1; |
|
fc_host_maxframe_size(lport->host) = lport->mfs; |
|
fc_host_supported_speeds(lport->host) = 0; |
|
if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT) |
|
fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT; |
|
if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT) |
|
fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT; |
|
if (lport->link_supported_speeds & FC_PORTSPEED_40GBIT) |
|
fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_40GBIT; |
|
if (lport->link_supported_speeds & FC_PORTSPEED_100GBIT) |
|
fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_100GBIT; |
|
if (lport->link_supported_speeds & FC_PORTSPEED_25GBIT) |
|
fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_25GBIT; |
|
if (lport->link_supported_speeds & FC_PORTSPEED_50GBIT) |
|
fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_50GBIT; |
|
if (lport->link_supported_speeds & FC_PORTSPEED_100GBIT) |
|
fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_100GBIT; |
|
|
|
fc_fc4_add_lport(lport); |
|
|
|
fc_host_num_discovered_ports(lport->host) = DISCOVERED_PORTS; |
|
fc_host_port_state(lport->host) = FC_PORTSTATE_ONLINE; |
|
fc_host_max_ct_payload(lport->host) = MAX_CT_PAYLOAD; |
|
fc_host_num_ports(lport->host) = NUMBER_OF_PORTS; |
|
fc_host_bootbios_state(lport->host) = 0X00000000; |
|
snprintf(fc_host_bootbios_version(lport->host), |
|
FC_SYMBOLIC_NAME_SIZE, "%s", "Unknown"); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(fc_lport_init); |
|
|
|
/** |
|
* fc_lport_bsg_resp() - The common response handler for FC Passthrough requests |
|
* @sp: The sequence for the FC Passthrough response |
|
* @fp: The response frame |
|
* @info_arg: The BSG info that the response is for |
|
*/ |
|
static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, |
|
void *info_arg) |
|
{ |
|
struct fc_bsg_info *info = info_arg; |
|
struct bsg_job *job = info->job; |
|
struct fc_bsg_reply *bsg_reply = job->reply; |
|
struct fc_lport *lport = info->lport; |
|
struct fc_frame_header *fh; |
|
size_t len; |
|
void *buf; |
|
|
|
if (IS_ERR(fp)) { |
|
bsg_reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? |
|
-ECONNABORTED : -ETIMEDOUT; |
|
job->reply_len = sizeof(uint32_t); |
|
bsg_job_done(job, bsg_reply->result, |
|
bsg_reply->reply_payload_rcv_len); |
|
kfree(info); |
|
return; |
|
} |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
fh = fc_frame_header_get(fp); |
|
len = fr_len(fp) - sizeof(*fh); |
|
buf = fc_frame_payload_get(fp, 0); |
|
|
|
if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { |
|
/* Get the response code from the first frame payload */ |
|
unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? |
|
ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : |
|
(unsigned short)fc_frame_payload_op(fp); |
|
|
|
/* Save the reply status of the job */ |
|
bsg_reply->reply_data.ctels_reply.status = |
|
(cmd == info->rsp_code) ? |
|
FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; |
|
} |
|
|
|
bsg_reply->reply_payload_rcv_len += |
|
fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, |
|
&info->offset, NULL); |
|
|
|
if (fr_eof(fp) == FC_EOF_T && |
|
(ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == |
|
(FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { |
|
if (bsg_reply->reply_payload_rcv_len > |
|
job->reply_payload.payload_len) |
|
bsg_reply->reply_payload_rcv_len = |
|
job->reply_payload.payload_len; |
|
bsg_reply->result = 0; |
|
bsg_job_done(job, bsg_reply->result, |
|
bsg_reply->reply_payload_rcv_len); |
|
kfree(info); |
|
} |
|
fc_frame_free(fp); |
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
|
|
/** |
|
* fc_lport_els_request() - Send ELS passthrough request |
|
* @job: The BSG Passthrough job |
|
* @lport: The local port sending the request |
|
* @did: The destination port id |
|
* @tov: The timeout period (in ms) |
|
*/ |
|
static int fc_lport_els_request(struct bsg_job *job, |
|
struct fc_lport *lport, |
|
u32 did, u32 tov) |
|
{ |
|
struct fc_bsg_info *info; |
|
struct fc_frame *fp; |
|
struct fc_frame_header *fh; |
|
char *pp; |
|
int len; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
fp = fc_frame_alloc(lport, job->request_payload.payload_len); |
|
if (!fp) |
|
return -ENOMEM; |
|
|
|
len = job->request_payload.payload_len; |
|
pp = fc_frame_payload_get(fp, len); |
|
|
|
sg_copy_to_buffer(job->request_payload.sg_list, |
|
job->request_payload.sg_cnt, |
|
pp, len); |
|
|
|
fh = fc_frame_header_get(fp); |
|
fh->fh_r_ctl = FC_RCTL_ELS_REQ; |
|
hton24(fh->fh_d_id, did); |
|
hton24(fh->fh_s_id, lport->port_id); |
|
fh->fh_type = FC_TYPE_ELS; |
|
hton24(fh->fh_f_ctl, FC_FCTL_REQ); |
|
fh->fh_cs_ctl = 0; |
|
fh->fh_df_ctl = 0; |
|
fh->fh_parm_offset = 0; |
|
|
|
info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); |
|
if (!info) { |
|
fc_frame_free(fp); |
|
return -ENOMEM; |
|
} |
|
|
|
info->job = job; |
|
info->lport = lport; |
|
info->rsp_code = ELS_LS_ACC; |
|
info->nents = job->reply_payload.sg_cnt; |
|
info->sg = job->reply_payload.sg_list; |
|
|
|
if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp, |
|
NULL, info, tov)) { |
|
kfree(info); |
|
return -ECOMM; |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* fc_lport_ct_request() - Send CT Passthrough request |
|
* @job: The BSG Passthrough job |
|
* @lport: The local port sending the request |
|
* @did: The destination FC-ID |
|
* @tov: The timeout period to wait for the response |
|
*/ |
|
static int fc_lport_ct_request(struct bsg_job *job, |
|
struct fc_lport *lport, u32 did, u32 tov) |
|
{ |
|
struct fc_bsg_info *info; |
|
struct fc_frame *fp; |
|
struct fc_frame_header *fh; |
|
struct fc_ct_req *ct; |
|
size_t len; |
|
|
|
lockdep_assert_held(&lport->lp_mutex); |
|
|
|
fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + |
|
job->request_payload.payload_len); |
|
if (!fp) |
|
return -ENOMEM; |
|
|
|
len = job->request_payload.payload_len; |
|
ct = fc_frame_payload_get(fp, len); |
|
|
|
sg_copy_to_buffer(job->request_payload.sg_list, |
|
job->request_payload.sg_cnt, |
|
ct, len); |
|
|
|
fh = fc_frame_header_get(fp); |
|
fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; |
|
hton24(fh->fh_d_id, did); |
|
hton24(fh->fh_s_id, lport->port_id); |
|
fh->fh_type = FC_TYPE_CT; |
|
hton24(fh->fh_f_ctl, FC_FCTL_REQ); |
|
fh->fh_cs_ctl = 0; |
|
fh->fh_df_ctl = 0; |
|
fh->fh_parm_offset = 0; |
|
|
|
info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); |
|
if (!info) { |
|
fc_frame_free(fp); |
|
return -ENOMEM; |
|
} |
|
|
|
info->job = job; |
|
info->lport = lport; |
|
info->rsp_code = FC_FS_ACC; |
|
info->nents = job->reply_payload.sg_cnt; |
|
info->sg = job->reply_payload.sg_list; |
|
|
|
if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp, |
|
NULL, info, tov)) { |
|
kfree(info); |
|
return -ECOMM; |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* fc_lport_bsg_request() - The common entry point for sending |
|
* FC Passthrough requests |
|
* @job: The BSG passthrough job |
|
*/ |
|
int fc_lport_bsg_request(struct bsg_job *job) |
|
{ |
|
struct fc_bsg_request *bsg_request = job->request; |
|
struct fc_bsg_reply *bsg_reply = job->reply; |
|
struct Scsi_Host *shost = fc_bsg_to_shost(job); |
|
struct fc_lport *lport = shost_priv(shost); |
|
struct fc_rport *rport; |
|
struct fc_rport_priv *rdata; |
|
int rc = -EINVAL; |
|
u32 did, tov; |
|
|
|
bsg_reply->reply_payload_rcv_len = 0; |
|
|
|
mutex_lock(&lport->lp_mutex); |
|
|
|
switch (bsg_request->msgcode) { |
|
case FC_BSG_RPT_ELS: |
|
rport = fc_bsg_to_rport(job); |
|
if (!rport) |
|
break; |
|
|
|
rdata = rport->dd_data; |
|
rc = fc_lport_els_request(job, lport, rport->port_id, |
|
rdata->e_d_tov); |
|
break; |
|
|
|
case FC_BSG_RPT_CT: |
|
rport = fc_bsg_to_rport(job); |
|
if (!rport) |
|
break; |
|
|
|
rdata = rport->dd_data; |
|
rc = fc_lport_ct_request(job, lport, rport->port_id, |
|
rdata->e_d_tov); |
|
break; |
|
|
|
case FC_BSG_HST_CT: |
|
did = ntoh24(bsg_request->rqst_data.h_ct.port_id); |
|
if (did == FC_FID_DIR_SERV) { |
|
rdata = lport->dns_rdata; |
|
if (!rdata) |
|
break; |
|
tov = rdata->e_d_tov; |
|
} else { |
|
rdata = fc_rport_lookup(lport, did); |
|
if (!rdata) |
|
break; |
|
tov = rdata->e_d_tov; |
|
kref_put(&rdata->kref, fc_rport_destroy); |
|
} |
|
|
|
rc = fc_lport_ct_request(job, lport, did, tov); |
|
break; |
|
|
|
case FC_BSG_HST_ELS_NOLOGIN: |
|
did = ntoh24(bsg_request->rqst_data.h_els.port_id); |
|
rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); |
|
break; |
|
} |
|
|
|
mutex_unlock(&lport->lp_mutex); |
|
return rc; |
|
} |
|
EXPORT_SYMBOL(fc_lport_bsg_request);
|
|
|