Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | * |
| 17 | * Maintained at www.Open-FCoE.org |
| 18 | */ |
| 19 | |
| 20 | /* |
| 21 | * RPORT GENERAL INFO |
| 22 | * |
| 23 | * This file contains all processing regarding fc_rports. It contains the |
| 24 | * rport state machine and does all rport interaction with the transport class. |
| 25 | * There should be no other places in libfc that interact directly with the |
| 26 | * transport class in regards to adding and deleting rports. |
| 27 | * |
| 28 | * fc_rport's represent N_Port's within the fabric. |
| 29 | */ |
| 30 | |
| 31 | /* |
| 32 | * RPORT LOCKING |
| 33 | * |
| 34 | * The rport should never hold the rport mutex and then attempt to acquire |
| 35 | * either the lport or disc mutexes. The rport's mutex is considered lesser |
| 36 | * than both the lport's mutex and the disc mutex. Refer to fc_lport.c for |
| 37 | * more comments on the heirarchy. |
| 38 | * |
| 39 | * The locking strategy is similar to the lport's strategy. The lock protects |
| 40 | * the rport's states and is held and released by the entry points to the rport |
| 41 | * block. All _enter_* functions correspond to rport states and expect the rport |
| 42 | * mutex to be locked before calling them. This means that rports only handle |
| 43 | * one request or response at a time, since they're not critical for the I/O |
| 44 | * path this potential over-use of the mutex is acceptable. |
| 45 | */ |
| 46 | |
| 47 | #include <linux/kernel.h> |
| 48 | #include <linux/spinlock.h> |
| 49 | #include <linux/interrupt.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 50 | #include <linux/slab.h> |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 51 | #include <linux/rcupdate.h> |
| 52 | #include <linux/timer.h> |
| 53 | #include <linux/workqueue.h> |
| 54 | #include <asm/unaligned.h> |
| 55 | |
| 56 | #include <scsi/libfc.h> |
| 57 | #include <scsi/fc_encode.h> |
| 58 | |
Robert Love | 8866a5d | 2009-11-03 11:45:58 -0800 | [diff] [blame] | 59 | #include "fc_libfc.h" |
| 60 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 61 | struct workqueue_struct *rport_event_queue; |
| 62 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 63 | static void fc_rport_enter_plogi(struct fc_rport_priv *); |
| 64 | static void fc_rport_enter_prli(struct fc_rport_priv *); |
| 65 | static void fc_rport_enter_rtv(struct fc_rport_priv *); |
| 66 | static void fc_rport_enter_ready(struct fc_rport_priv *); |
| 67 | static void fc_rport_enter_logo(struct fc_rport_priv *); |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 68 | static void fc_rport_enter_adisc(struct fc_rport_priv *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 69 | |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 70 | static void fc_rport_recv_plogi_req(struct fc_lport *, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 71 | struct fc_seq *, struct fc_frame *); |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 72 | static void fc_rport_recv_prli_req(struct fc_rport_priv *, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 73 | struct fc_seq *, struct fc_frame *); |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 74 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 75 | struct fc_seq *, struct fc_frame *); |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 76 | static void fc_rport_recv_logo_req(struct fc_lport *, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 77 | struct fc_seq *, struct fc_frame *); |
| 78 | static void fc_rport_timeout(struct work_struct *); |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 79 | static void fc_rport_error(struct fc_rport_priv *, struct fc_frame *); |
| 80 | static void fc_rport_error_retry(struct fc_rport_priv *, struct fc_frame *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 81 | static void fc_rport_work(struct work_struct *); |
| 82 | |
| 83 | static const char *fc_rport_state_names[] = { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 84 | [RPORT_ST_INIT] = "Init", |
| 85 | [RPORT_ST_PLOGI] = "PLOGI", |
| 86 | [RPORT_ST_PRLI] = "PRLI", |
| 87 | [RPORT_ST_RTV] = "RTV", |
| 88 | [RPORT_ST_READY] = "Ready", |
| 89 | [RPORT_ST_LOGO] = "LOGO", |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 90 | [RPORT_ST_ADISC] = "ADISC", |
Joe Eykholt | 1419405 | 2009-07-29 17:04:43 -0700 | [diff] [blame] | 91 | [RPORT_ST_DELETE] = "Delete", |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 92 | }; |
| 93 | |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 94 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 95 | * fc_rport_lookup() - Lookup a remote port by port_id |
| 96 | * @lport: The local port to lookup the remote port on |
| 97 | * @port_id: The remote port ID to look up |
Joe Eykholt | 8025b5d | 2009-08-25 14:02:06 -0700 | [diff] [blame] | 98 | */ |
| 99 | static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport, |
| 100 | u32 port_id) |
| 101 | { |
| 102 | struct fc_rport_priv *rdata; |
| 103 | |
| 104 | list_for_each_entry(rdata, &lport->disc.rports, peers) |
Joe Eykholt | b4a9c7e | 2009-10-21 16:28:30 -0700 | [diff] [blame] | 105 | if (rdata->ids.port_id == port_id) |
Joe Eykholt | 8025b5d | 2009-08-25 14:02:06 -0700 | [diff] [blame] | 106 | return rdata; |
| 107 | return NULL; |
| 108 | } |
| 109 | |
| 110 | /** |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 111 | * fc_rport_create() - Create a new remote port |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 112 | * @lport: The local port this remote port will be associated with |
| 113 | * @ids: The identifiers for the new remote port |
| 114 | * |
| 115 | * The remote port will start in the INIT state. |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 116 | * |
Joe Eykholt | 48f0090 | 2009-08-25 14:01:50 -0700 | [diff] [blame] | 117 | * Locking note: must be called with the disc_mutex held. |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 118 | */ |
| 119 | static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 120 | u32 port_id) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 121 | { |
Joe Eykholt | ab28f1f | 2009-08-25 14:00:34 -0700 | [diff] [blame] | 122 | struct fc_rport_priv *rdata; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 123 | |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 124 | rdata = lport->tt.rport_lookup(lport, port_id); |
Joe Eykholt | 19f97e3 | 2009-08-25 14:01:55 -0700 | [diff] [blame] | 125 | if (rdata) |
| 126 | return rdata; |
| 127 | |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 128 | rdata = kzalloc(sizeof(*rdata), GFP_KERNEL); |
| 129 | if (!rdata) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 130 | return NULL; |
| 131 | |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 132 | rdata->ids.node_name = -1; |
| 133 | rdata->ids.port_name = -1; |
| 134 | rdata->ids.port_id = port_id; |
| 135 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; |
| 136 | |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 137 | kref_init(&rdata->kref); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 138 | mutex_init(&rdata->rp_mutex); |
Joe Eykholt | 795d86f | 2009-08-25 14:00:39 -0700 | [diff] [blame] | 139 | rdata->local_port = lport; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 140 | rdata->rp_state = RPORT_ST_INIT; |
| 141 | rdata->event = RPORT_EV_NONE; |
| 142 | rdata->flags = FC_RP_FLAGS_REC_SUPPORTED; |
Joe Eykholt | 795d86f | 2009-08-25 14:00:39 -0700 | [diff] [blame] | 143 | rdata->e_d_tov = lport->e_d_tov; |
| 144 | rdata->r_a_tov = lport->r_a_tov; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 145 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 146 | INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout); |
| 147 | INIT_WORK(&rdata->event_work, fc_rport_work); |
Robert Love | 9737e6a | 2009-08-25 14:02:59 -0700 | [diff] [blame] | 148 | if (port_id != FC_FID_DIR_SERV) |
Joe Eykholt | 48f0090 | 2009-08-25 14:01:50 -0700 | [diff] [blame] | 149 | list_add(&rdata->peers, &lport->disc.rports); |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 150 | return rdata; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 154 | * fc_rport_destroy() - Free a remote port after last reference is released |
| 155 | * @kref: The remote port's kref |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 156 | */ |
| 157 | static void fc_rport_destroy(struct kref *kref) |
| 158 | { |
| 159 | struct fc_rport_priv *rdata; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 160 | |
| 161 | rdata = container_of(kref, struct fc_rport_priv, kref); |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 162 | kfree(rdata); |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 166 | * fc_rport_state() - Return a string identifying the remote port's state |
| 167 | * @rdata: The remote port |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 168 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 169 | static const char *fc_rport_state(struct fc_rport_priv *rdata) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 170 | { |
| 171 | const char *cp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 172 | |
| 173 | cp = fc_rport_state_names[rdata->rp_state]; |
| 174 | if (!cp) |
| 175 | cp = "Unknown"; |
| 176 | return cp; |
| 177 | } |
| 178 | |
| 179 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 180 | * fc_set_rport_loss_tmo() - Set the remote port loss timeout |
| 181 | * @rport: The remote port that gets a new timeout value |
| 182 | * @timeout: The new timeout value (in seconds) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 183 | */ |
| 184 | void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout) |
| 185 | { |
| 186 | if (timeout) |
| 187 | rport->dev_loss_tmo = timeout + 5; |
| 188 | else |
| 189 | rport->dev_loss_tmo = 30; |
| 190 | } |
| 191 | EXPORT_SYMBOL(fc_set_rport_loss_tmo); |
| 192 | |
| 193 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 194 | * fc_plogi_get_maxframe() - Get the maximum payload from the common service |
| 195 | * parameters in a FLOGI frame |
| 196 | * @flp: The FLOGI payload |
| 197 | * @maxval: The maximum frame size upper limit; this may be less than what |
| 198 | * is in the service parameters |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 199 | */ |
Robert Love | b2ab99c | 2009-02-27 10:55:50 -0800 | [diff] [blame] | 200 | static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp, |
| 201 | unsigned int maxval) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 202 | { |
| 203 | unsigned int mfs; |
| 204 | |
| 205 | /* |
| 206 | * Get max payload from the common service parameters and the |
| 207 | * class 3 receive data field size. |
| 208 | */ |
| 209 | mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK; |
| 210 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) |
| 211 | maxval = mfs; |
| 212 | mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs); |
| 213 | if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval) |
| 214 | maxval = mfs; |
| 215 | return maxval; |
| 216 | } |
| 217 | |
| 218 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 219 | * fc_rport_state_enter() - Change the state of a remote port |
| 220 | * @rdata: The remote port whose state should change |
| 221 | * @new: The new state |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 222 | * |
| 223 | * Locking Note: Called with the rport lock held |
| 224 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 225 | static void fc_rport_state_enter(struct fc_rport_priv *rdata, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 226 | enum fc_rport_state new) |
| 227 | { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 228 | if (rdata->rp_state != new) |
| 229 | rdata->retries = 0; |
| 230 | rdata->rp_state = new; |
| 231 | } |
| 232 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 233 | /** |
| 234 | * fc_rport_work() - Handler for remote port events in the rport_event_queue |
| 235 | * @work: Handle to the remote port being dequeued |
| 236 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 237 | static void fc_rport_work(struct work_struct *work) |
| 238 | { |
Abhijeet Joglekar | 571f824 | 2009-02-27 10:54:41 -0800 | [diff] [blame] | 239 | u32 port_id; |
Joe Eykholt | ab28f1f | 2009-08-25 14:00:34 -0700 | [diff] [blame] | 240 | struct fc_rport_priv *rdata = |
| 241 | container_of(work, struct fc_rport_priv, event_work); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 242 | struct fc_rport_libfc_priv *rpriv; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 243 | enum fc_rport_event event; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 244 | struct fc_lport *lport = rdata->local_port; |
| 245 | struct fc_rport_operations *rport_ops; |
Joe Eykholt | 629f442 | 2009-08-25 14:01:06 -0700 | [diff] [blame] | 246 | struct fc_rport_identifiers ids; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 247 | struct fc_rport *rport; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 248 | |
| 249 | mutex_lock(&rdata->rp_mutex); |
| 250 | event = rdata->event; |
| 251 | rport_ops = rdata->ops; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 252 | rport = rdata->rport; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 253 | |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 254 | FC_RPORT_DBG(rdata, "work event %u\n", event); |
| 255 | |
Joe Eykholt | 629f442 | 2009-08-25 14:01:06 -0700 | [diff] [blame] | 256 | switch (event) { |
Joe Eykholt | 4c0f62b | 2009-08-25 14:01:12 -0700 | [diff] [blame] | 257 | case RPORT_EV_READY: |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 258 | ids = rdata->ids; |
Joe Eykholt | 5f7ea3b | 2009-07-29 17:04:49 -0700 | [diff] [blame] | 259 | rdata->event = RPORT_EV_NONE; |
Joe Eykholt | f034260 | 2010-06-11 16:44:57 -0700 | [diff] [blame^] | 260 | rdata->major_retries = 0; |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 261 | kref_get(&rdata->kref); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 262 | mutex_unlock(&rdata->rp_mutex); |
| 263 | |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 264 | if (!rport) |
| 265 | rport = fc_remote_port_add(lport->host, 0, &ids); |
| 266 | if (!rport) { |
| 267 | FC_RPORT_DBG(rdata, "Failed to add the rport\n"); |
| 268 | lport->tt.rport_logoff(rdata); |
| 269 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
| 270 | return; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 271 | } |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 272 | mutex_lock(&rdata->rp_mutex); |
| 273 | if (rdata->rport) |
| 274 | FC_RPORT_DBG(rdata, "rport already allocated\n"); |
| 275 | rdata->rport = rport; |
| 276 | rport->maxframe_size = rdata->maxframe_size; |
| 277 | rport->supported_classes = rdata->supported_classes; |
| 278 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 279 | rpriv = rport->dd_data; |
| 280 | rpriv->local_port = lport; |
| 281 | rpriv->rp_state = rdata->rp_state; |
| 282 | rpriv->flags = rdata->flags; |
| 283 | rpriv->e_d_tov = rdata->e_d_tov; |
| 284 | rpriv->r_a_tov = rdata->r_a_tov; |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 285 | mutex_unlock(&rdata->rp_mutex); |
| 286 | |
Joe Eykholt | 8345592 | 2009-08-25 14:02:01 -0700 | [diff] [blame] | 287 | if (rport_ops && rport_ops->event_callback) { |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 288 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 289 | rport_ops->event_callback(lport, rdata, event); |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 290 | } |
| 291 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
Joe Eykholt | 629f442 | 2009-08-25 14:01:06 -0700 | [diff] [blame] | 292 | break; |
| 293 | |
| 294 | case RPORT_EV_FAILED: |
| 295 | case RPORT_EV_LOGO: |
| 296 | case RPORT_EV_STOP: |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 297 | port_id = rdata->ids.port_id; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 298 | mutex_unlock(&rdata->rp_mutex); |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 299 | |
Joe Eykholt | 8345592 | 2009-08-25 14:02:01 -0700 | [diff] [blame] | 300 | if (rport_ops && rport_ops->event_callback) { |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 301 | FC_RPORT_DBG(rdata, "callback ev %d\n", event); |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 302 | rport_ops->event_callback(lport, rdata, event); |
Abhijeet Joglekar | 571f824 | 2009-02-27 10:54:41 -0800 | [diff] [blame] | 303 | } |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 304 | cancel_delayed_work_sync(&rdata->retry_work); |
| 305 | |
| 306 | /* |
| 307 | * Reset any outstanding exchanges before freeing rport. |
| 308 | */ |
| 309 | lport->tt.exch_mgr_reset(lport, 0, port_id); |
| 310 | lport->tt.exch_mgr_reset(lport, port_id, 0); |
| 311 | |
| 312 | if (rport) { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 313 | rpriv = rport->dd_data; |
| 314 | rpriv->rp_state = RPORT_ST_DELETE; |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 315 | mutex_lock(&rdata->rp_mutex); |
| 316 | rdata->rport = NULL; |
| 317 | mutex_unlock(&rdata->rp_mutex); |
| 318 | fc_remote_port_delete(rport); |
| 319 | } |
Joe Eykholt | 4b2164d | 2010-06-11 16:44:51 -0700 | [diff] [blame] | 320 | |
| 321 | mutex_lock(&lport->disc.disc_mutex); |
| 322 | mutex_lock(&rdata->rp_mutex); |
| 323 | if (rdata->rp_state == RPORT_ST_DELETE) { |
| 324 | if (port_id == FC_FID_DIR_SERV) { |
| 325 | rdata->event = RPORT_EV_NONE; |
| 326 | mutex_unlock(&rdata->rp_mutex); |
Joe Eykholt | f034260 | 2010-06-11 16:44:57 -0700 | [diff] [blame^] | 327 | } else if ((rdata->flags & FC_RP_STARTED) && |
| 328 | rdata->major_retries < |
| 329 | lport->max_rport_retry_count) { |
| 330 | rdata->major_retries++; |
Joe Eykholt | 4b2164d | 2010-06-11 16:44:51 -0700 | [diff] [blame] | 331 | rdata->event = RPORT_EV_NONE; |
| 332 | FC_RPORT_DBG(rdata, "work restart\n"); |
| 333 | fc_rport_enter_plogi(rdata); |
| 334 | mutex_unlock(&rdata->rp_mutex); |
| 335 | } else { |
| 336 | FC_RPORT_DBG(rdata, "work delete\n"); |
| 337 | list_del(&rdata->peers); |
| 338 | mutex_unlock(&rdata->rp_mutex); |
| 339 | kref_put(&rdata->kref, lport->tt.rport_destroy); |
| 340 | } |
| 341 | } else { |
| 342 | /* |
| 343 | * Re-open for events. Reissue READY event if ready. |
| 344 | */ |
| 345 | rdata->event = RPORT_EV_NONE; |
| 346 | if (rdata->rp_state == RPORT_ST_READY) |
| 347 | fc_rport_enter_ready(rdata); |
Joe Eykholt | b4a9c7e | 2009-10-21 16:28:30 -0700 | [diff] [blame] | 348 | mutex_unlock(&rdata->rp_mutex); |
Joe Eykholt | 4b2164d | 2010-06-11 16:44:51 -0700 | [diff] [blame] | 349 | } |
| 350 | mutex_unlock(&lport->disc.disc_mutex); |
Joe Eykholt | 629f442 | 2009-08-25 14:01:06 -0700 | [diff] [blame] | 351 | break; |
| 352 | |
| 353 | default: |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 354 | mutex_unlock(&rdata->rp_mutex); |
Joe Eykholt | 629f442 | 2009-08-25 14:01:06 -0700 | [diff] [blame] | 355 | break; |
| 356 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 360 | * fc_rport_login() - Start the remote port login state machine |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 361 | * @rdata: The remote port to be logged in to |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 362 | * |
| 363 | * Locking Note: Called without the rport lock held. This |
| 364 | * function will hold the rport lock, call an _enter_* |
| 365 | * function and then unlock the rport. |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 366 | * |
| 367 | * This indicates the intent to be logged into the remote port. |
| 368 | * If it appears we are already logged in, ADISC is used to verify |
| 369 | * the setup. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 370 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 371 | int fc_rport_login(struct fc_rport_priv *rdata) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 372 | { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 373 | mutex_lock(&rdata->rp_mutex); |
| 374 | |
Joe Eykholt | 4b2164d | 2010-06-11 16:44:51 -0700 | [diff] [blame] | 375 | rdata->flags |= FC_RP_STARTED; |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 376 | switch (rdata->rp_state) { |
| 377 | case RPORT_ST_READY: |
| 378 | FC_RPORT_DBG(rdata, "ADISC port\n"); |
| 379 | fc_rport_enter_adisc(rdata); |
| 380 | break; |
Joe Eykholt | b4a9c7e | 2009-10-21 16:28:30 -0700 | [diff] [blame] | 381 | case RPORT_ST_DELETE: |
| 382 | FC_RPORT_DBG(rdata, "Restart deleted port\n"); |
Joe Eykholt | b4a9c7e | 2009-10-21 16:28:30 -0700 | [diff] [blame] | 383 | break; |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 384 | default: |
| 385 | FC_RPORT_DBG(rdata, "Login to port\n"); |
| 386 | fc_rport_enter_plogi(rdata); |
| 387 | break; |
| 388 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 389 | mutex_unlock(&rdata->rp_mutex); |
| 390 | |
| 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 395 | * fc_rport_enter_delete() - Schedule a remote port to be deleted |
| 396 | * @rdata: The remote port to be deleted |
| 397 | * @event: The event to report as the reason for deletion |
Joe Eykholt | 5f7ea3b | 2009-07-29 17:04:49 -0700 | [diff] [blame] | 398 | * |
| 399 | * Locking Note: Called with the rport lock held. |
| 400 | * |
| 401 | * Allow state change into DELETE only once. |
| 402 | * |
| 403 | * Call queue_work only if there's no event already pending. |
| 404 | * Set the new event so that the old pending event will not occur. |
| 405 | * Since we have the mutex, even if fc_rport_work() is already started, |
| 406 | * it'll see the new event. |
| 407 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 408 | static void fc_rport_enter_delete(struct fc_rport_priv *rdata, |
Joe Eykholt | 5f7ea3b | 2009-07-29 17:04:49 -0700 | [diff] [blame] | 409 | enum fc_rport_event event) |
| 410 | { |
Joe Eykholt | 5f7ea3b | 2009-07-29 17:04:49 -0700 | [diff] [blame] | 411 | if (rdata->rp_state == RPORT_ST_DELETE) |
| 412 | return; |
| 413 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 414 | FC_RPORT_DBG(rdata, "Delete port\n"); |
Joe Eykholt | 5f7ea3b | 2009-07-29 17:04:49 -0700 | [diff] [blame] | 415 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 416 | fc_rport_state_enter(rdata, RPORT_ST_DELETE); |
Joe Eykholt | 5f7ea3b | 2009-07-29 17:04:49 -0700 | [diff] [blame] | 417 | |
| 418 | if (rdata->event == RPORT_EV_NONE) |
| 419 | queue_work(rport_event_queue, &rdata->event_work); |
| 420 | rdata->event = event; |
| 421 | } |
| 422 | |
| 423 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 424 | * fc_rport_logoff() - Logoff and remove a remote port |
| 425 | * @rdata: The remote port to be logged off of |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 426 | * |
| 427 | * Locking Note: Called without the rport lock held. This |
| 428 | * function will hold the rport lock, call an _enter_* |
| 429 | * function and then unlock the rport. |
| 430 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 431 | int fc_rport_logoff(struct fc_rport_priv *rdata) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 432 | { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 433 | mutex_lock(&rdata->rp_mutex); |
| 434 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 435 | FC_RPORT_DBG(rdata, "Remove port\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 436 | |
Joe Eykholt | 4b2164d | 2010-06-11 16:44:51 -0700 | [diff] [blame] | 437 | rdata->flags &= ~FC_RP_STARTED; |
Joe Eykholt | 1419405 | 2009-07-29 17:04:43 -0700 | [diff] [blame] | 438 | if (rdata->rp_state == RPORT_ST_DELETE) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 439 | FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n"); |
Abhijeet Joglekar | b4c6f54 | 2009-04-21 16:27:04 -0700 | [diff] [blame] | 440 | goto out; |
| 441 | } |
Joe Eykholt | 4b2164d | 2010-06-11 16:44:51 -0700 | [diff] [blame] | 442 | fc_rport_enter_logo(rdata); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 443 | |
| 444 | /* |
Joe Eykholt | 1419405 | 2009-07-29 17:04:43 -0700 | [diff] [blame] | 445 | * Change the state to Delete so that we discard |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 446 | * the response. |
| 447 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 448 | fc_rport_enter_delete(rdata, RPORT_EV_STOP); |
Abhijeet Joglekar | b4c6f54 | 2009-04-21 16:27:04 -0700 | [diff] [blame] | 449 | out: |
Joe Eykholt | b4a9c7e | 2009-10-21 16:28:30 -0700 | [diff] [blame] | 450 | mutex_unlock(&rdata->rp_mutex); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 451 | return 0; |
| 452 | } |
| 453 | |
| 454 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 455 | * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state |
| 456 | * @rdata: The remote port that is ready |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 457 | * |
| 458 | * Locking Note: The rport lock is expected to be held before calling |
| 459 | * this routine. |
| 460 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 461 | static void fc_rport_enter_ready(struct fc_rport_priv *rdata) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 462 | { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 463 | fc_rport_state_enter(rdata, RPORT_ST_READY); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 464 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 465 | FC_RPORT_DBG(rdata, "Port is Ready\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 466 | |
Joe Eykholt | 5f7ea3b | 2009-07-29 17:04:49 -0700 | [diff] [blame] | 467 | if (rdata->event == RPORT_EV_NONE) |
| 468 | queue_work(rport_event_queue, &rdata->event_work); |
Joe Eykholt | 4c0f62b | 2009-08-25 14:01:12 -0700 | [diff] [blame] | 469 | rdata->event = RPORT_EV_READY; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 473 | * fc_rport_timeout() - Handler for the retry_work timer |
| 474 | * @work: Handle to the remote port that has timed out |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 475 | * |
| 476 | * Locking Note: Called without the rport lock held. This |
| 477 | * function will hold the rport lock, call an _enter_* |
| 478 | * function and then unlock the rport. |
| 479 | */ |
| 480 | static void fc_rport_timeout(struct work_struct *work) |
| 481 | { |
Joe Eykholt | ab28f1f | 2009-08-25 14:00:34 -0700 | [diff] [blame] | 482 | struct fc_rport_priv *rdata = |
| 483 | container_of(work, struct fc_rport_priv, retry_work.work); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 484 | |
| 485 | mutex_lock(&rdata->rp_mutex); |
| 486 | |
| 487 | switch (rdata->rp_state) { |
| 488 | case RPORT_ST_PLOGI: |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 489 | fc_rport_enter_plogi(rdata); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 490 | break; |
| 491 | case RPORT_ST_PRLI: |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 492 | fc_rport_enter_prli(rdata); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 493 | break; |
| 494 | case RPORT_ST_RTV: |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 495 | fc_rport_enter_rtv(rdata); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 496 | break; |
| 497 | case RPORT_ST_LOGO: |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 498 | fc_rport_enter_logo(rdata); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 499 | break; |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 500 | case RPORT_ST_ADISC: |
| 501 | fc_rport_enter_adisc(rdata); |
| 502 | break; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 503 | case RPORT_ST_READY: |
| 504 | case RPORT_ST_INIT: |
Joe Eykholt | 1419405 | 2009-07-29 17:04:43 -0700 | [diff] [blame] | 505 | case RPORT_ST_DELETE: |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 506 | break; |
| 507 | } |
| 508 | |
| 509 | mutex_unlock(&rdata->rp_mutex); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 510 | } |
| 511 | |
| 512 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 513 | * fc_rport_error() - Error handler, called once retries have been exhausted |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 514 | * @rdata: The remote port the error is happened on |
| 515 | * @fp: The error code encapsulated in a frame pointer |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 516 | * |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 517 | * Locking Note: The rport lock is expected to be held before |
| 518 | * calling this routine |
| 519 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 520 | static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 521 | { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 522 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retries %d\n", |
Joe Eykholt | cdbe6df | 2009-08-25 14:01:39 -0700 | [diff] [blame] | 523 | IS_ERR(fp) ? -PTR_ERR(fp) : 0, |
| 524 | fc_rport_state(rdata), rdata->retries); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 525 | |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 526 | switch (rdata->rp_state) { |
| 527 | case RPORT_ST_PLOGI: |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 528 | case RPORT_ST_LOGO: |
Joe Eykholt | 4b2164d | 2010-06-11 16:44:51 -0700 | [diff] [blame] | 529 | rdata->flags &= ~FC_RP_STARTED; |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 530 | fc_rport_enter_delete(rdata, RPORT_EV_FAILED); |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 531 | break; |
| 532 | case RPORT_ST_RTV: |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 533 | fc_rport_enter_ready(rdata); |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 534 | break; |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 535 | case RPORT_ST_PRLI: |
| 536 | case RPORT_ST_ADISC: |
| 537 | fc_rport_enter_logo(rdata); |
| 538 | break; |
Joe Eykholt | 1419405 | 2009-07-29 17:04:43 -0700 | [diff] [blame] | 539 | case RPORT_ST_DELETE: |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 540 | case RPORT_ST_READY: |
| 541 | case RPORT_ST_INIT: |
| 542 | break; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 543 | } |
| 544 | } |
| 545 | |
| 546 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 547 | * fc_rport_error_retry() - Handler for remote port state retries |
| 548 | * @rdata: The remote port whose state is to be retried |
| 549 | * @fp: The error code encapsulated in a frame pointer |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 550 | * |
| 551 | * If the error was an exchange timeout retry immediately, |
| 552 | * otherwise wait for E_D_TOV. |
| 553 | * |
| 554 | * Locking Note: The rport lock is expected to be held before |
| 555 | * calling this routine |
| 556 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 557 | static void fc_rport_error_retry(struct fc_rport_priv *rdata, |
| 558 | struct fc_frame *fp) |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 559 | { |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 560 | unsigned long delay = FC_DEF_E_D_TOV; |
| 561 | |
| 562 | /* make sure this isn't an FC_EX_CLOSED error, never retry those */ |
| 563 | if (PTR_ERR(fp) == -FC_EX_CLOSED) |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 564 | return fc_rport_error(rdata, fp); |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 565 | |
Abhijeet Joglekar | a366695 | 2009-05-01 10:01:26 -0700 | [diff] [blame] | 566 | if (rdata->retries < rdata->local_port->max_rport_retry_count) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 567 | FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n", |
| 568 | PTR_ERR(fp), fc_rport_state(rdata)); |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 569 | rdata->retries++; |
| 570 | /* no additional delay on exchange timeouts */ |
| 571 | if (PTR_ERR(fp) == -FC_EX_TIMEOUT) |
| 572 | delay = 0; |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 573 | schedule_delayed_work(&rdata->retry_work, delay); |
| 574 | return; |
| 575 | } |
| 576 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 577 | return fc_rport_error(rdata, fp); |
Chris Leech | 6755db1 | 2009-02-27 10:55:02 -0800 | [diff] [blame] | 578 | } |
| 579 | |
| 580 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 581 | * fc_rport_plogi_recv_resp() - Handler for ELS PLOGI responses |
| 582 | * @sp: The sequence the PLOGI is on |
| 583 | * @fp: The PLOGI response frame |
| 584 | * @rdata_arg: The remote port that sent the PLOGI response |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 585 | * |
| 586 | * Locking Note: This function will be called without the rport lock |
| 587 | * held, but it will lock, call an _enter_* function or fc_rport_error |
| 588 | * and then unlock the rport. |
| 589 | */ |
| 590 | static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp, |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 591 | void *rdata_arg) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 592 | { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 593 | struct fc_rport_priv *rdata = rdata_arg; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 594 | struct fc_lport *lport = rdata->local_port; |
Robert Love | a29e764 | 2009-04-21 16:27:41 -0700 | [diff] [blame] | 595 | struct fc_els_flogi *plp = NULL; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 596 | unsigned int tov; |
| 597 | u16 csp_seq; |
| 598 | u16 cssp_seq; |
| 599 | u8 op; |
| 600 | |
| 601 | mutex_lock(&rdata->rp_mutex); |
| 602 | |
Joe Eykholt | f657d29 | 2009-08-25 14:03:21 -0700 | [diff] [blame] | 603 | FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 604 | |
| 605 | if (rdata->rp_state != RPORT_ST_PLOGI) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 606 | FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state " |
| 607 | "%s\n", fc_rport_state(rdata)); |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 608 | if (IS_ERR(fp)) |
| 609 | goto err; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 610 | goto out; |
| 611 | } |
| 612 | |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 613 | if (IS_ERR(fp)) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 614 | fc_rport_error_retry(rdata, fp); |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 615 | goto err; |
| 616 | } |
| 617 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 618 | op = fc_frame_payload_op(fp); |
| 619 | if (op == ELS_LS_ACC && |
| 620 | (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) { |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 621 | rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn); |
| 622 | rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 623 | |
| 624 | tov = ntohl(plp->fl_csp.sp_e_d_tov); |
| 625 | if (ntohs(plp->fl_csp.sp_features) & FC_SP_FT_EDTR) |
Hugh Daschbach | 3b70915 | 2010-01-21 10:15:49 -0800 | [diff] [blame] | 626 | tov /= 1000000; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 627 | if (tov > rdata->e_d_tov) |
| 628 | rdata->e_d_tov = tov; |
| 629 | csp_seq = ntohs(plp->fl_csp.sp_tot_seq); |
| 630 | cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq); |
| 631 | if (cssp_seq < csp_seq) |
| 632 | csp_seq = cssp_seq; |
| 633 | rdata->max_seq = csp_seq; |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 634 | rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs); |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 635 | fc_rport_enter_prli(rdata); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 636 | } else |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 637 | fc_rport_error_retry(rdata, fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 638 | |
| 639 | out: |
| 640 | fc_frame_free(fp); |
| 641 | err: |
| 642 | mutex_unlock(&rdata->rp_mutex); |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 643 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 644 | } |
| 645 | |
| 646 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 647 | * fc_rport_enter_plogi() - Send Port Login (PLOGI) request |
| 648 | * @rdata: The remote port to send a PLOGI to |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 649 | * |
| 650 | * Locking Note: The rport lock is expected to be held before calling |
| 651 | * this routine. |
| 652 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 653 | static void fc_rport_enter_plogi(struct fc_rport_priv *rdata) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 654 | { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 655 | struct fc_lport *lport = rdata->local_port; |
| 656 | struct fc_frame *fp; |
| 657 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 658 | FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n", |
| 659 | fc_rport_state(rdata)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 660 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 661 | fc_rport_state_enter(rdata, RPORT_ST_PLOGI); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 662 | |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 663 | rdata->maxframe_size = FC_MIN_MAX_PAYLOAD; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 664 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi)); |
| 665 | if (!fp) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 666 | fc_rport_error_retry(rdata, fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 667 | return; |
| 668 | } |
| 669 | rdata->e_d_tov = lport->e_d_tov; |
| 670 | |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 671 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI, |
Joe Eykholt | b94f895 | 2009-11-03 11:50:21 -0800 | [diff] [blame] | 672 | fc_rport_plogi_resp, rdata, |
| 673 | 2 * lport->r_a_tov)) |
Chris Leech | 8f550f9 | 2009-10-21 16:28:09 -0700 | [diff] [blame] | 674 | fc_rport_error_retry(rdata, NULL); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 675 | else |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 676 | kref_get(&rdata->kref); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 677 | } |
| 678 | |
| 679 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 680 | * fc_rport_prli_resp() - Process Login (PRLI) response handler |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 681 | * @sp: The sequence the PRLI response was on |
| 682 | * @fp: The PRLI response frame |
| 683 | * @rdata_arg: The remote port that sent the PRLI response |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 684 | * |
| 685 | * Locking Note: This function will be called without the rport lock |
| 686 | * held, but it will lock, call an _enter_* function or fc_rport_error |
| 687 | * and then unlock the rport. |
| 688 | */ |
| 689 | static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp, |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 690 | void *rdata_arg) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 691 | { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 692 | struct fc_rport_priv *rdata = rdata_arg; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 693 | struct { |
| 694 | struct fc_els_prli prli; |
| 695 | struct fc_els_spp spp; |
| 696 | } *pp; |
| 697 | u32 roles = FC_RPORT_ROLE_UNKNOWN; |
| 698 | u32 fcp_parm = 0; |
| 699 | u8 op; |
Bhanu Prakash Gollapudi | 618461c | 2010-06-11 16:43:54 -0700 | [diff] [blame] | 700 | u8 resp_code = 0; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 701 | |
| 702 | mutex_lock(&rdata->rp_mutex); |
| 703 | |
Joe Eykholt | f657d29 | 2009-08-25 14:03:21 -0700 | [diff] [blame] | 704 | FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 705 | |
| 706 | if (rdata->rp_state != RPORT_ST_PRLI) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 707 | FC_RPORT_DBG(rdata, "Received a PRLI response, but in state " |
| 708 | "%s\n", fc_rport_state(rdata)); |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 709 | if (IS_ERR(fp)) |
| 710 | goto err; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 711 | goto out; |
| 712 | } |
| 713 | |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 714 | if (IS_ERR(fp)) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 715 | fc_rport_error_retry(rdata, fp); |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 716 | goto err; |
| 717 | } |
| 718 | |
Robert Love | 6bd054c | 2009-08-25 14:03:04 -0700 | [diff] [blame] | 719 | /* reinitialize remote port roles */ |
| 720 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; |
| 721 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 722 | op = fc_frame_payload_op(fp); |
| 723 | if (op == ELS_LS_ACC) { |
| 724 | pp = fc_frame_payload_get(fp, sizeof(*pp)); |
Bhanu Prakash Gollapudi | 618461c | 2010-06-11 16:43:54 -0700 | [diff] [blame] | 725 | if (!pp) |
| 726 | goto out; |
| 727 | |
| 728 | resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK); |
| 729 | FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x\n", |
| 730 | pp->spp.spp_flags); |
| 731 | if (resp_code != FC_SPP_RESP_ACK) { |
| 732 | if (resp_code == FC_SPP_RESP_CONF) |
| 733 | fc_rport_error(rdata, fp); |
| 734 | else |
| 735 | fc_rport_error_retry(rdata, fp); |
| 736 | goto out; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 737 | } |
Bhanu Prakash Gollapudi | 618461c | 2010-06-11 16:43:54 -0700 | [diff] [blame] | 738 | if (pp->prli.prli_spp_len < sizeof(pp->spp)) |
| 739 | goto out; |
| 740 | |
| 741 | fcp_parm = ntohl(pp->spp.spp_params); |
| 742 | if (fcp_parm & FCP_SPPF_RETRY) |
| 743 | rdata->flags |= FC_RP_FLAGS_RETRY; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 744 | |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 745 | rdata->supported_classes = FC_COS_CLASS3; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 746 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
| 747 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; |
| 748 | if (fcp_parm & FCP_SPPF_TARG_FCN) |
| 749 | roles |= FC_RPORT_ROLE_FCP_TARGET; |
| 750 | |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 751 | rdata->ids.roles = roles; |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 752 | fc_rport_enter_rtv(rdata); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 753 | |
| 754 | } else { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 755 | FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n"); |
Bhanu Prakash Gollapudi | 292e40b | 2010-06-11 16:43:49 -0700 | [diff] [blame] | 756 | fc_rport_error_retry(rdata, fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 757 | } |
| 758 | |
| 759 | out: |
| 760 | fc_frame_free(fp); |
| 761 | err: |
| 762 | mutex_unlock(&rdata->rp_mutex); |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 763 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 767 | * fc_rport_logo_resp() - Handler for logout (LOGO) responses |
| 768 | * @sp: The sequence the LOGO was on |
| 769 | * @fp: The LOGO response frame |
| 770 | * @rdata_arg: The remote port that sent the LOGO response |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 771 | * |
| 772 | * Locking Note: This function will be called without the rport lock |
| 773 | * held, but it will lock, call an _enter_* function or fc_rport_error |
| 774 | * and then unlock the rport. |
| 775 | */ |
| 776 | static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp, |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 777 | void *rdata_arg) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 778 | { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 779 | struct fc_rport_priv *rdata = rdata_arg; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 780 | u8 op; |
| 781 | |
| 782 | mutex_lock(&rdata->rp_mutex); |
| 783 | |
Joe Eykholt | f657d29 | 2009-08-25 14:03:21 -0700 | [diff] [blame] | 784 | FC_RPORT_DBG(rdata, "Received a LOGO %s\n", fc_els_resp_type(fp)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 785 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 786 | if (rdata->rp_state != RPORT_ST_LOGO) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 787 | FC_RPORT_DBG(rdata, "Received a LOGO response, but in state " |
| 788 | "%s\n", fc_rport_state(rdata)); |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 789 | if (IS_ERR(fp)) |
| 790 | goto err; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 791 | goto out; |
| 792 | } |
| 793 | |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 794 | if (IS_ERR(fp)) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 795 | fc_rport_error_retry(rdata, fp); |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 796 | goto err; |
| 797 | } |
| 798 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 799 | op = fc_frame_payload_op(fp); |
Joe Eykholt | 68a1750 | 2009-08-25 14:03:42 -0700 | [diff] [blame] | 800 | if (op != ELS_LS_ACC) |
| 801 | FC_RPORT_DBG(rdata, "Bad ELS response op %x for LOGO command\n", |
| 802 | op); |
| 803 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 804 | |
| 805 | out: |
| 806 | fc_frame_free(fp); |
| 807 | err: |
| 808 | mutex_unlock(&rdata->rp_mutex); |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 809 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 810 | } |
| 811 | |
| 812 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 813 | * fc_rport_enter_prli() - Send Process Login (PRLI) request |
| 814 | * @rdata: The remote port to send the PRLI request to |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 815 | * |
| 816 | * Locking Note: The rport lock is expected to be held before calling |
| 817 | * this routine. |
| 818 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 819 | static void fc_rport_enter_prli(struct fc_rport_priv *rdata) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 820 | { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 821 | struct fc_lport *lport = rdata->local_port; |
| 822 | struct { |
| 823 | struct fc_els_prli prli; |
| 824 | struct fc_els_spp spp; |
| 825 | } *pp; |
| 826 | struct fc_frame *fp; |
| 827 | |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 828 | /* |
| 829 | * If the rport is one of the well known addresses |
| 830 | * we skip PRLI and RTV and go straight to READY. |
| 831 | */ |
| 832 | if (rdata->ids.port_id >= FC_FID_DOM_MGR) { |
| 833 | fc_rport_enter_ready(rdata); |
| 834 | return; |
| 835 | } |
| 836 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 837 | FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n", |
| 838 | fc_rport_state(rdata)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 839 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 840 | fc_rport_state_enter(rdata, RPORT_ST_PRLI); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 841 | |
| 842 | fp = fc_frame_alloc(lport, sizeof(*pp)); |
| 843 | if (!fp) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 844 | fc_rport_error_retry(rdata, fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 845 | return; |
| 846 | } |
| 847 | |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 848 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PRLI, |
Joe Eykholt | b94f895 | 2009-11-03 11:50:21 -0800 | [diff] [blame] | 849 | fc_rport_prli_resp, rdata, |
| 850 | 2 * lport->r_a_tov)) |
Chris Leech | 8f550f9 | 2009-10-21 16:28:09 -0700 | [diff] [blame] | 851 | fc_rport_error_retry(rdata, NULL); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 852 | else |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 853 | kref_get(&rdata->kref); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 857 | * fc_rport_els_rtv_resp() - Handler for Request Timeout Value (RTV) responses |
| 858 | * @sp: The sequence the RTV was on |
| 859 | * @fp: The RTV response frame |
| 860 | * @rdata_arg: The remote port that sent the RTV response |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 861 | * |
| 862 | * Many targets don't seem to support this. |
| 863 | * |
| 864 | * Locking Note: This function will be called without the rport lock |
| 865 | * held, but it will lock, call an _enter_* function or fc_rport_error |
| 866 | * and then unlock the rport. |
| 867 | */ |
| 868 | static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp, |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 869 | void *rdata_arg) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 870 | { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 871 | struct fc_rport_priv *rdata = rdata_arg; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 872 | u8 op; |
| 873 | |
| 874 | mutex_lock(&rdata->rp_mutex); |
| 875 | |
Joe Eykholt | f657d29 | 2009-08-25 14:03:21 -0700 | [diff] [blame] | 876 | FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 877 | |
| 878 | if (rdata->rp_state != RPORT_ST_RTV) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 879 | FC_RPORT_DBG(rdata, "Received a RTV response, but in state " |
| 880 | "%s\n", fc_rport_state(rdata)); |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 881 | if (IS_ERR(fp)) |
| 882 | goto err; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 883 | goto out; |
| 884 | } |
| 885 | |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 886 | if (IS_ERR(fp)) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 887 | fc_rport_error(rdata, fp); |
Abhijeet Joglekar | 76f6804 | 2009-04-21 16:26:58 -0700 | [diff] [blame] | 888 | goto err; |
| 889 | } |
| 890 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 891 | op = fc_frame_payload_op(fp); |
| 892 | if (op == ELS_LS_ACC) { |
| 893 | struct fc_els_rtv_acc *rtv; |
| 894 | u32 toq; |
| 895 | u32 tov; |
| 896 | |
| 897 | rtv = fc_frame_payload_get(fp, sizeof(*rtv)); |
| 898 | if (rtv) { |
| 899 | toq = ntohl(rtv->rtv_toq); |
| 900 | tov = ntohl(rtv->rtv_r_a_tov); |
| 901 | if (tov == 0) |
| 902 | tov = 1; |
| 903 | rdata->r_a_tov = tov; |
| 904 | tov = ntohl(rtv->rtv_e_d_tov); |
| 905 | if (toq & FC_ELS_RTV_EDRES) |
| 906 | tov /= 1000000; |
| 907 | if (tov == 0) |
| 908 | tov = 1; |
| 909 | rdata->e_d_tov = tov; |
| 910 | } |
| 911 | } |
| 912 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 913 | fc_rport_enter_ready(rdata); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 914 | |
| 915 | out: |
| 916 | fc_frame_free(fp); |
| 917 | err: |
| 918 | mutex_unlock(&rdata->rp_mutex); |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 919 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 920 | } |
| 921 | |
| 922 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 923 | * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request |
| 924 | * @rdata: The remote port to send the RTV request to |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 925 | * |
| 926 | * Locking Note: The rport lock is expected to be held before calling |
| 927 | * this routine. |
| 928 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 929 | static void fc_rport_enter_rtv(struct fc_rport_priv *rdata) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 930 | { |
| 931 | struct fc_frame *fp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 932 | struct fc_lport *lport = rdata->local_port; |
| 933 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 934 | FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n", |
| 935 | fc_rport_state(rdata)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 936 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 937 | fc_rport_state_enter(rdata, RPORT_ST_RTV); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 938 | |
| 939 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv)); |
| 940 | if (!fp) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 941 | fc_rport_error_retry(rdata, fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 942 | return; |
| 943 | } |
| 944 | |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 945 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV, |
Joe Eykholt | b94f895 | 2009-11-03 11:50:21 -0800 | [diff] [blame] | 946 | fc_rport_rtv_resp, rdata, |
| 947 | 2 * lport->r_a_tov)) |
Chris Leech | 8f550f9 | 2009-10-21 16:28:09 -0700 | [diff] [blame] | 948 | fc_rport_error_retry(rdata, NULL); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 949 | else |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 950 | kref_get(&rdata->kref); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 951 | } |
| 952 | |
| 953 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 954 | * fc_rport_enter_logo() - Send a logout (LOGO) request |
| 955 | * @rdata: The remote port to send the LOGO request to |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 956 | * |
| 957 | * Locking Note: The rport lock is expected to be held before calling |
| 958 | * this routine. |
| 959 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 960 | static void fc_rport_enter_logo(struct fc_rport_priv *rdata) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 961 | { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 962 | struct fc_lport *lport = rdata->local_port; |
| 963 | struct fc_frame *fp; |
| 964 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 965 | FC_RPORT_DBG(rdata, "Port entered LOGO state from %s state\n", |
| 966 | fc_rport_state(rdata)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 967 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 968 | fc_rport_state_enter(rdata, RPORT_ST_LOGO); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 969 | |
| 970 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo)); |
| 971 | if (!fp) { |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 972 | fc_rport_error_retry(rdata, fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 973 | return; |
| 974 | } |
| 975 | |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 976 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO, |
Joe Eykholt | b94f895 | 2009-11-03 11:50:21 -0800 | [diff] [blame] | 977 | fc_rport_logo_resp, rdata, |
| 978 | 2 * lport->r_a_tov)) |
Chris Leech | 8f550f9 | 2009-10-21 16:28:09 -0700 | [diff] [blame] | 979 | fc_rport_error_retry(rdata, NULL); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 980 | else |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 981 | kref_get(&rdata->kref); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 982 | } |
| 983 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 984 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 985 | * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses |
| 986 | * @sp: The sequence the ADISC response was on |
| 987 | * @fp: The ADISC response frame |
| 988 | * @rdata_arg: The remote port that sent the ADISC response |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 989 | * |
| 990 | * Locking Note: This function will be called without the rport lock |
| 991 | * held, but it will lock, call an _enter_* function or fc_rport_error |
| 992 | * and then unlock the rport. |
| 993 | */ |
| 994 | static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp, |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 995 | void *rdata_arg) |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 996 | { |
| 997 | struct fc_rport_priv *rdata = rdata_arg; |
| 998 | struct fc_els_adisc *adisc; |
| 999 | u8 op; |
| 1000 | |
| 1001 | mutex_lock(&rdata->rp_mutex); |
| 1002 | |
| 1003 | FC_RPORT_DBG(rdata, "Received a ADISC response\n"); |
| 1004 | |
| 1005 | if (rdata->rp_state != RPORT_ST_ADISC) { |
| 1006 | FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n", |
| 1007 | fc_rport_state(rdata)); |
| 1008 | if (IS_ERR(fp)) |
| 1009 | goto err; |
| 1010 | goto out; |
| 1011 | } |
| 1012 | |
| 1013 | if (IS_ERR(fp)) { |
| 1014 | fc_rport_error(rdata, fp); |
| 1015 | goto err; |
| 1016 | } |
| 1017 | |
| 1018 | /* |
| 1019 | * If address verification failed. Consider us logged out of the rport. |
| 1020 | * Since the rport is still in discovery, we want to be |
| 1021 | * logged in, so go to PLOGI state. Otherwise, go back to READY. |
| 1022 | */ |
| 1023 | op = fc_frame_payload_op(fp); |
| 1024 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); |
| 1025 | if (op != ELS_LS_ACC || !adisc || |
| 1026 | ntoh24(adisc->adisc_port_id) != rdata->ids.port_id || |
| 1027 | get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name || |
| 1028 | get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) { |
| 1029 | FC_RPORT_DBG(rdata, "ADISC error or mismatch\n"); |
| 1030 | fc_rport_enter_plogi(rdata); |
| 1031 | } else { |
| 1032 | FC_RPORT_DBG(rdata, "ADISC OK\n"); |
| 1033 | fc_rport_enter_ready(rdata); |
| 1034 | } |
| 1035 | out: |
| 1036 | fc_frame_free(fp); |
| 1037 | err: |
| 1038 | mutex_unlock(&rdata->rp_mutex); |
| 1039 | kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy); |
| 1040 | } |
| 1041 | |
| 1042 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1043 | * fc_rport_enter_adisc() - Send Address Discover (ADISC) request |
| 1044 | * @rdata: The remote port to send the ADISC request to |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 1045 | * |
| 1046 | * Locking Note: The rport lock is expected to be held before calling |
| 1047 | * this routine. |
| 1048 | */ |
| 1049 | static void fc_rport_enter_adisc(struct fc_rport_priv *rdata) |
| 1050 | { |
| 1051 | struct fc_lport *lport = rdata->local_port; |
| 1052 | struct fc_frame *fp; |
| 1053 | |
| 1054 | FC_RPORT_DBG(rdata, "sending ADISC from %s state\n", |
| 1055 | fc_rport_state(rdata)); |
| 1056 | |
| 1057 | fc_rport_state_enter(rdata, RPORT_ST_ADISC); |
| 1058 | |
| 1059 | fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc)); |
| 1060 | if (!fp) { |
| 1061 | fc_rport_error_retry(rdata, fp); |
| 1062 | return; |
| 1063 | } |
| 1064 | if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC, |
Joe Eykholt | b94f895 | 2009-11-03 11:50:21 -0800 | [diff] [blame] | 1065 | fc_rport_adisc_resp, rdata, |
| 1066 | 2 * lport->r_a_tov)) |
Chris Leech | 8f550f9 | 2009-10-21 16:28:09 -0700 | [diff] [blame] | 1067 | fc_rport_error_retry(rdata, NULL); |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 1068 | else |
| 1069 | kref_get(&rdata->kref); |
| 1070 | } |
| 1071 | |
| 1072 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1073 | * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests |
| 1074 | * @rdata: The remote port that sent the ADISC request |
| 1075 | * @sp: The sequence the ADISC request was on |
| 1076 | * @in_fp: The ADISC request frame |
Joe Eykholt | 8abbe3a | 2009-08-25 14:03:52 -0700 | [diff] [blame] | 1077 | * |
| 1078 | * Locking Note: Called with the lport and rport locks held. |
| 1079 | */ |
| 1080 | static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata, |
| 1081 | struct fc_seq *sp, struct fc_frame *in_fp) |
| 1082 | { |
| 1083 | struct fc_lport *lport = rdata->local_port; |
| 1084 | struct fc_frame *fp; |
| 1085 | struct fc_exch *ep = fc_seq_exch(sp); |
| 1086 | struct fc_els_adisc *adisc; |
| 1087 | struct fc_seq_els_data rjt_data; |
| 1088 | u32 f_ctl; |
| 1089 | |
| 1090 | FC_RPORT_DBG(rdata, "Received ADISC request\n"); |
| 1091 | |
| 1092 | adisc = fc_frame_payload_get(in_fp, sizeof(*adisc)); |
| 1093 | if (!adisc) { |
| 1094 | rjt_data.fp = NULL; |
| 1095 | rjt_data.reason = ELS_RJT_PROT; |
| 1096 | rjt_data.explan = ELS_EXPL_INV_LEN; |
| 1097 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); |
| 1098 | goto drop; |
| 1099 | } |
| 1100 | |
| 1101 | fp = fc_frame_alloc(lport, sizeof(*adisc)); |
| 1102 | if (!fp) |
| 1103 | goto drop; |
| 1104 | fc_adisc_fill(lport, fp); |
| 1105 | adisc = fc_frame_payload_get(fp, sizeof(*adisc)); |
| 1106 | adisc->adisc_cmd = ELS_LS_ACC; |
| 1107 | sp = lport->tt.seq_start_next(sp); |
| 1108 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT; |
| 1109 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, |
| 1110 | FC_TYPE_ELS, f_ctl, 0); |
| 1111 | lport->tt.seq_send(lport, sp, fp); |
| 1112 | drop: |
| 1113 | fc_frame_free(in_fp); |
| 1114 | } |
| 1115 | |
| 1116 | /** |
Yi Zou | 63e27fb | 2009-11-20 14:55:24 -0800 | [diff] [blame] | 1117 | * fc_rport_recv_rls_req() - Handle received Read Link Status request |
| 1118 | * @rdata: The remote port that sent the RLS request |
| 1119 | * @sp: The sequence that the RLS was on |
| 1120 | * @rx_fp: The PRLI request frame |
| 1121 | * |
| 1122 | * Locking Note: The rport lock is expected to be held before calling |
| 1123 | * this function. |
| 1124 | */ |
| 1125 | static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata, |
| 1126 | struct fc_seq *sp, struct fc_frame *rx_fp) |
| 1127 | |
| 1128 | { |
| 1129 | struct fc_lport *lport = rdata->local_port; |
| 1130 | struct fc_frame *fp; |
| 1131 | struct fc_exch *ep = fc_seq_exch(sp); |
| 1132 | struct fc_els_rls *rls; |
| 1133 | struct fc_els_rls_resp *rsp; |
| 1134 | struct fc_els_lesb *lesb; |
| 1135 | struct fc_seq_els_data rjt_data; |
| 1136 | struct fc_host_statistics *hst; |
| 1137 | u32 f_ctl; |
| 1138 | |
| 1139 | FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n", |
| 1140 | fc_rport_state(rdata)); |
| 1141 | |
| 1142 | rls = fc_frame_payload_get(rx_fp, sizeof(*rls)); |
| 1143 | if (!rls) { |
| 1144 | rjt_data.reason = ELS_RJT_PROT; |
| 1145 | rjt_data.explan = ELS_EXPL_INV_LEN; |
| 1146 | goto out_rjt; |
| 1147 | } |
| 1148 | |
| 1149 | fp = fc_frame_alloc(lport, sizeof(*rsp)); |
| 1150 | if (!fp) { |
| 1151 | rjt_data.reason = ELS_RJT_UNAB; |
| 1152 | rjt_data.explan = ELS_EXPL_INSUF_RES; |
| 1153 | goto out_rjt; |
| 1154 | } |
| 1155 | |
| 1156 | rsp = fc_frame_payload_get(fp, sizeof(*rsp)); |
| 1157 | memset(rsp, 0, sizeof(*rsp)); |
| 1158 | rsp->rls_cmd = ELS_LS_ACC; |
| 1159 | lesb = &rsp->rls_lesb; |
| 1160 | if (lport->tt.get_lesb) { |
| 1161 | /* get LESB from LLD if it supports it */ |
| 1162 | lport->tt.get_lesb(lport, lesb); |
| 1163 | } else { |
| 1164 | fc_get_host_stats(lport->host); |
| 1165 | hst = &lport->host_stats; |
| 1166 | lesb->lesb_link_fail = htonl(hst->link_failure_count); |
| 1167 | lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count); |
| 1168 | lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count); |
| 1169 | lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count); |
| 1170 | lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count); |
| 1171 | lesb->lesb_inv_crc = htonl(hst->invalid_crc_count); |
| 1172 | } |
| 1173 | |
| 1174 | sp = lport->tt.seq_start_next(sp); |
| 1175 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ; |
| 1176 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, |
| 1177 | FC_TYPE_ELS, f_ctl, 0); |
| 1178 | lport->tt.seq_send(lport, sp, fp); |
| 1179 | goto out; |
| 1180 | |
| 1181 | out_rjt: |
| 1182 | rjt_data.fp = NULL; |
| 1183 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); |
| 1184 | out: |
| 1185 | fc_frame_free(rx_fp); |
| 1186 | } |
| 1187 | |
| 1188 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1189 | * fc_rport_recv_els_req() - Handler for validated ELS requests |
| 1190 | * @lport: The local port that received the ELS request |
| 1191 | * @sp: The sequence that the ELS request was on |
| 1192 | * @fp: The ELS request frame |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1193 | * |
| 1194 | * Handle incoming ELS requests that require port login. |
| 1195 | * The ELS opcode has already been validated by the caller. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1196 | * |
Joe Eykholt | 131203a | 2009-08-25 14:03:10 -0700 | [diff] [blame] | 1197 | * Locking Note: Called with the lport lock held. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1198 | */ |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1199 | static void fc_rport_recv_els_req(struct fc_lport *lport, |
| 1200 | struct fc_seq *sp, struct fc_frame *fp) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1201 | { |
Joe Eykholt | 131203a | 2009-08-25 14:03:10 -0700 | [diff] [blame] | 1202 | struct fc_rport_priv *rdata; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1203 | struct fc_frame_header *fh; |
| 1204 | struct fc_seq_els_data els_data; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1205 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1206 | els_data.fp = NULL; |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1207 | els_data.reason = ELS_RJT_UNAB; |
| 1208 | els_data.explan = ELS_EXPL_PLOGI_REQD; |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1209 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1210 | fh = fc_frame_header_get(fp); |
| 1211 | |
Joe Eykholt | 25b37b9 | 2009-08-25 14:03:15 -0700 | [diff] [blame] | 1212 | mutex_lock(&lport->disc.disc_mutex); |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1213 | rdata = lport->tt.rport_lookup(lport, ntoh24(fh->fh_s_id)); |
Joe Eykholt | 131203a | 2009-08-25 14:03:10 -0700 | [diff] [blame] | 1214 | if (!rdata) { |
Joe Eykholt | 25b37b9 | 2009-08-25 14:03:15 -0700 | [diff] [blame] | 1215 | mutex_unlock(&lport->disc.disc_mutex); |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1216 | goto reject; |
Joe Eykholt | 131203a | 2009-08-25 14:03:10 -0700 | [diff] [blame] | 1217 | } |
| 1218 | mutex_lock(&rdata->rp_mutex); |
Joe Eykholt | 25b37b9 | 2009-08-25 14:03:15 -0700 | [diff] [blame] | 1219 | mutex_unlock(&lport->disc.disc_mutex); |
Joe Eykholt | 131203a | 2009-08-25 14:03:10 -0700 | [diff] [blame] | 1220 | |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1221 | switch (rdata->rp_state) { |
| 1222 | case RPORT_ST_PRLI: |
| 1223 | case RPORT_ST_RTV: |
| 1224 | case RPORT_ST_READY: |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 1225 | case RPORT_ST_ADISC: |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1226 | break; |
| 1227 | default: |
| 1228 | mutex_unlock(&rdata->rp_mutex); |
| 1229 | goto reject; |
| 1230 | } |
| 1231 | |
| 1232 | switch (fc_frame_payload_op(fp)) { |
Joe Eykholt | 131203a | 2009-08-25 14:03:10 -0700 | [diff] [blame] | 1233 | case ELS_PRLI: |
| 1234 | fc_rport_recv_prli_req(rdata, sp, fp); |
| 1235 | break; |
| 1236 | case ELS_PRLO: |
| 1237 | fc_rport_recv_prlo_req(rdata, sp, fp); |
| 1238 | break; |
Joe Eykholt | 8abbe3a | 2009-08-25 14:03:52 -0700 | [diff] [blame] | 1239 | case ELS_ADISC: |
| 1240 | fc_rport_recv_adisc_req(rdata, sp, fp); |
| 1241 | break; |
Joe Eykholt | 131203a | 2009-08-25 14:03:10 -0700 | [diff] [blame] | 1242 | case ELS_RRQ: |
| 1243 | els_data.fp = fp; |
| 1244 | lport->tt.seq_els_rsp_send(sp, ELS_RRQ, &els_data); |
| 1245 | break; |
| 1246 | case ELS_REC: |
| 1247 | els_data.fp = fp; |
| 1248 | lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data); |
| 1249 | break; |
Yi Zou | 63e27fb | 2009-11-20 14:55:24 -0800 | [diff] [blame] | 1250 | case ELS_RLS: |
| 1251 | fc_rport_recv_rls_req(rdata, sp, fp); |
| 1252 | break; |
Joe Eykholt | 131203a | 2009-08-25 14:03:10 -0700 | [diff] [blame] | 1253 | default: |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1254 | fc_frame_free(fp); /* can't happen */ |
Joe Eykholt | 131203a | 2009-08-25 14:03:10 -0700 | [diff] [blame] | 1255 | break; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1256 | } |
| 1257 | |
| 1258 | mutex_unlock(&rdata->rp_mutex); |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1259 | return; |
| 1260 | |
| 1261 | reject: |
| 1262 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); |
| 1263 | fc_frame_free(fp); |
| 1264 | } |
| 1265 | |
| 1266 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1267 | * fc_rport_recv_req() - Handler for requests |
| 1268 | * @sp: The sequence the request was on |
| 1269 | * @fp: The request frame |
| 1270 | * @lport: The local port that received the request |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1271 | * |
| 1272 | * Locking Note: Called with the lport lock held. |
| 1273 | */ |
| 1274 | void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp, |
| 1275 | struct fc_lport *lport) |
| 1276 | { |
| 1277 | struct fc_seq_els_data els_data; |
| 1278 | |
| 1279 | /* |
| 1280 | * Handle PLOGI and LOGO requests separately, since they |
| 1281 | * don't require prior login. |
| 1282 | * Check for unsupported opcodes first and reject them. |
| 1283 | * For some ops, it would be incorrect to reject with "PLOGI required". |
| 1284 | */ |
| 1285 | switch (fc_frame_payload_op(fp)) { |
| 1286 | case ELS_PLOGI: |
| 1287 | fc_rport_recv_plogi_req(lport, sp, fp); |
| 1288 | break; |
| 1289 | case ELS_LOGO: |
| 1290 | fc_rport_recv_logo_req(lport, sp, fp); |
| 1291 | break; |
| 1292 | case ELS_PRLI: |
| 1293 | case ELS_PRLO: |
Joe Eykholt | 8abbe3a | 2009-08-25 14:03:52 -0700 | [diff] [blame] | 1294 | case ELS_ADISC: |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1295 | case ELS_RRQ: |
| 1296 | case ELS_REC: |
Yi Zou | 63e27fb | 2009-11-20 14:55:24 -0800 | [diff] [blame] | 1297 | case ELS_RLS: |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1298 | fc_rport_recv_els_req(lport, sp, fp); |
| 1299 | break; |
| 1300 | default: |
| 1301 | fc_frame_free(fp); |
| 1302 | els_data.fp = NULL; |
| 1303 | els_data.reason = ELS_RJT_UNSUP; |
| 1304 | els_data.explan = ELS_EXPL_NONE; |
| 1305 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data); |
| 1306 | break; |
| 1307 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1308 | } |
| 1309 | |
| 1310 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1311 | * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests |
| 1312 | * @lport: The local port that received the PLOGI request |
| 1313 | * @sp: The sequence that the PLOGI request was on |
| 1314 | * @rx_fp: The PLOGI request frame |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1315 | * |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1316 | * Locking Note: The rport lock is held before calling this function. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1317 | */ |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1318 | static void fc_rport_recv_plogi_req(struct fc_lport *lport, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1319 | struct fc_seq *sp, struct fc_frame *rx_fp) |
| 1320 | { |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1321 | struct fc_disc *disc; |
| 1322 | struct fc_rport_priv *rdata; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1323 | struct fc_frame *fp = rx_fp; |
| 1324 | struct fc_exch *ep; |
| 1325 | struct fc_frame_header *fh; |
| 1326 | struct fc_els_flogi *pl; |
| 1327 | struct fc_seq_els_data rjt_data; |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1328 | u32 sid, f_ctl; |
| 1329 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1330 | rjt_data.fp = NULL; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1331 | fh = fc_frame_header_get(fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1332 | sid = ntoh24(fh->fh_s_id); |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1333 | |
| 1334 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n"); |
| 1335 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1336 | pl = fc_frame_payload_get(fp, sizeof(*pl)); |
| 1337 | if (!pl) { |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1338 | FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n"); |
| 1339 | rjt_data.reason = ELS_RJT_PROT; |
| 1340 | rjt_data.explan = ELS_EXPL_INV_LEN; |
| 1341 | goto reject; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1342 | } |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1343 | |
| 1344 | disc = &lport->disc; |
| 1345 | mutex_lock(&disc->disc_mutex); |
| 1346 | rdata = lport->tt.rport_create(lport, sid); |
| 1347 | if (!rdata) { |
| 1348 | mutex_unlock(&disc->disc_mutex); |
| 1349 | rjt_data.reason = ELS_RJT_UNAB; |
| 1350 | rjt_data.explan = ELS_EXPL_INSUF_RES; |
| 1351 | goto reject; |
| 1352 | } |
| 1353 | |
| 1354 | mutex_lock(&rdata->rp_mutex); |
| 1355 | mutex_unlock(&disc->disc_mutex); |
| 1356 | |
| 1357 | rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn); |
| 1358 | rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1359 | |
| 1360 | /* |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1361 | * If the rport was just created, possibly due to the incoming PLOGI, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1362 | * set the state appropriately and accept the PLOGI. |
| 1363 | * |
| 1364 | * If we had also sent a PLOGI, and if the received PLOGI is from a |
| 1365 | * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason |
| 1366 | * "command already in progress". |
| 1367 | * |
| 1368 | * XXX TBD: If the session was ready before, the PLOGI should result in |
| 1369 | * all outstanding exchanges being reset. |
| 1370 | */ |
| 1371 | switch (rdata->rp_state) { |
| 1372 | case RPORT_ST_INIT: |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1373 | FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1374 | break; |
| 1375 | case RPORT_ST_PLOGI: |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1376 | FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n"); |
| 1377 | if (rdata->ids.port_name < lport->wwpn) { |
| 1378 | mutex_unlock(&rdata->rp_mutex); |
| 1379 | rjt_data.reason = ELS_RJT_INPROG; |
| 1380 | rjt_data.explan = ELS_EXPL_NONE; |
| 1381 | goto reject; |
| 1382 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1383 | break; |
| 1384 | case RPORT_ST_PRLI: |
Joe Eykholt | b4a9c7e | 2009-10-21 16:28:30 -0700 | [diff] [blame] | 1385 | case RPORT_ST_RTV: |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1386 | case RPORT_ST_READY: |
Joe Eykholt | 370c3bd | 2009-08-25 14:03:47 -0700 | [diff] [blame] | 1387 | case RPORT_ST_ADISC: |
| 1388 | FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d " |
| 1389 | "- ignored for now\n", rdata->rp_state); |
| 1390 | /* XXX TBD - should reset */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1391 | break; |
Joe Eykholt | 1419405 | 2009-07-29 17:04:43 -0700 | [diff] [blame] | 1392 | case RPORT_ST_DELETE: |
Joe Eykholt | b4a9c7e | 2009-10-21 16:28:30 -0700 | [diff] [blame] | 1393 | case RPORT_ST_LOGO: |
Joe Eykholt | b4a9c7e | 2009-10-21 16:28:30 -0700 | [diff] [blame] | 1394 | FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n", |
| 1395 | fc_rport_state(rdata)); |
| 1396 | mutex_unlock(&rdata->rp_mutex); |
| 1397 | rjt_data.reason = ELS_RJT_BUSY; |
| 1398 | rjt_data.explan = ELS_EXPL_NONE; |
| 1399 | goto reject; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1400 | } |
| 1401 | |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1402 | /* |
| 1403 | * Get session payload size from incoming PLOGI. |
| 1404 | */ |
| 1405 | rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs); |
| 1406 | fc_frame_free(rx_fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1407 | |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1408 | /* |
| 1409 | * Send LS_ACC. If this fails, the originator should retry. |
| 1410 | */ |
| 1411 | sp = lport->tt.seq_start_next(sp); |
| 1412 | if (!sp) |
| 1413 | goto out; |
| 1414 | fp = fc_frame_alloc(lport, sizeof(*pl)); |
| 1415 | if (!fp) |
| 1416 | goto out; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1417 | |
Joe Eykholt | 3ac6f98 | 2009-08-25 14:03:26 -0700 | [diff] [blame] | 1418 | fc_plogi_fill(lport, fp, ELS_LS_ACC); |
| 1419 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT; |
| 1420 | ep = fc_seq_exch(sp); |
| 1421 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, |
| 1422 | FC_TYPE_ELS, f_ctl, 0); |
| 1423 | lport->tt.seq_send(lport, sp, fp); |
| 1424 | fc_rport_enter_prli(rdata); |
| 1425 | out: |
| 1426 | mutex_unlock(&rdata->rp_mutex); |
| 1427 | return; |
| 1428 | |
| 1429 | reject: |
| 1430 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); |
| 1431 | fc_frame_free(fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1432 | } |
| 1433 | |
| 1434 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1435 | * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests |
| 1436 | * @rdata: The remote port that sent the PRLI request |
| 1437 | * @sp: The sequence that the PRLI was on |
| 1438 | * @rx_fp: The PRLI request frame |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1439 | * |
| 1440 | * Locking Note: The rport lock is exected to be held before calling |
| 1441 | * this function. |
| 1442 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 1443 | static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1444 | struct fc_seq *sp, struct fc_frame *rx_fp) |
| 1445 | { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1446 | struct fc_lport *lport = rdata->local_port; |
| 1447 | struct fc_exch *ep; |
| 1448 | struct fc_frame *fp; |
| 1449 | struct fc_frame_header *fh; |
| 1450 | struct { |
| 1451 | struct fc_els_prli prli; |
| 1452 | struct fc_els_spp spp; |
| 1453 | } *pp; |
| 1454 | struct fc_els_spp *rspp; /* request service param page */ |
| 1455 | struct fc_els_spp *spp; /* response spp */ |
| 1456 | unsigned int len; |
| 1457 | unsigned int plen; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1458 | enum fc_els_spp_resp resp; |
| 1459 | struct fc_seq_els_data rjt_data; |
| 1460 | u32 f_ctl; |
| 1461 | u32 fcp_parm; |
| 1462 | u32 roles = FC_RPORT_ROLE_UNKNOWN; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1463 | |
Joe Eykholt | a2f6a02 | 2010-03-12 16:07:36 -0800 | [diff] [blame] | 1464 | rjt_data.fp = NULL; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1465 | fh = fc_frame_header_get(rx_fp); |
| 1466 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 1467 | FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n", |
| 1468 | fc_rport_state(rdata)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1469 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1470 | len = fr_len(rx_fp) - sizeof(*fh); |
| 1471 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
Joe Eykholt | a2f6a02 | 2010-03-12 16:07:36 -0800 | [diff] [blame] | 1472 | if (!pp) |
| 1473 | goto reject_len; |
| 1474 | plen = ntohs(pp->prli.prli_len); |
| 1475 | if ((plen % 4) != 0 || plen > len || plen < 16) |
| 1476 | goto reject_len; |
| 1477 | if (plen < len) |
| 1478 | len = plen; |
| 1479 | plen = pp->prli.prli_spp_len; |
| 1480 | if ((plen % 4) != 0 || plen < sizeof(*spp) || |
| 1481 | plen > len || len < sizeof(*pp) || plen < 12) |
| 1482 | goto reject_len; |
| 1483 | rspp = &pp->spp; |
| 1484 | |
| 1485 | fp = fc_frame_alloc(lport, len); |
| 1486 | if (!fp) { |
| 1487 | rjt_data.reason = ELS_RJT_UNAB; |
| 1488 | rjt_data.explan = ELS_EXPL_INSUF_RES; |
| 1489 | goto reject; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1490 | } |
Joe Eykholt | a2f6a02 | 2010-03-12 16:07:36 -0800 | [diff] [blame] | 1491 | sp = lport->tt.seq_start_next(sp); |
| 1492 | WARN_ON(!sp); |
| 1493 | pp = fc_frame_payload_get(fp, len); |
| 1494 | WARN_ON(!pp); |
| 1495 | memset(pp, 0, len); |
| 1496 | pp->prli.prli_cmd = ELS_LS_ACC; |
| 1497 | pp->prli.prli_spp_len = plen; |
| 1498 | pp->prli.prli_len = htons(len); |
| 1499 | len -= sizeof(struct fc_els_prli); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1500 | |
Joe Eykholt | a2f6a02 | 2010-03-12 16:07:36 -0800 | [diff] [blame] | 1501 | /* reinitialize remote port roles */ |
| 1502 | rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN; |
Robert Love | 6bd054c | 2009-08-25 14:03:04 -0700 | [diff] [blame] | 1503 | |
Joe Eykholt | a2f6a02 | 2010-03-12 16:07:36 -0800 | [diff] [blame] | 1504 | /* |
| 1505 | * Go through all the service parameter pages and build |
| 1506 | * response. If plen indicates longer SPP than standard, |
| 1507 | * use that. The entire response has been pre-cleared above. |
| 1508 | */ |
| 1509 | spp = &pp->spp; |
| 1510 | while (len >= plen) { |
| 1511 | spp->spp_type = rspp->spp_type; |
| 1512 | spp->spp_type_ext = rspp->spp_type_ext; |
| 1513 | spp->spp_flags = rspp->spp_flags & FC_SPP_EST_IMG_PAIR; |
| 1514 | resp = FC_SPP_RESP_ACK; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1515 | |
Joe Eykholt | a2f6a02 | 2010-03-12 16:07:36 -0800 | [diff] [blame] | 1516 | switch (rspp->spp_type) { |
| 1517 | case 0: /* common to all FC-4 types */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1518 | break; |
Joe Eykholt | a2f6a02 | 2010-03-12 16:07:36 -0800 | [diff] [blame] | 1519 | case FC_TYPE_FCP: |
| 1520 | fcp_parm = ntohl(rspp->spp_params); |
| 1521 | if (fcp_parm & FCP_SPPF_RETRY) |
| 1522 | rdata->flags |= FC_RP_FLAGS_RETRY; |
| 1523 | rdata->supported_classes = FC_COS_CLASS3; |
| 1524 | if (fcp_parm & FCP_SPPF_INIT_FCN) |
| 1525 | roles |= FC_RPORT_ROLE_FCP_INITIATOR; |
| 1526 | if (fcp_parm & FCP_SPPF_TARG_FCN) |
| 1527 | roles |= FC_RPORT_ROLE_FCP_TARGET; |
| 1528 | rdata->ids.roles = roles; |
| 1529 | |
| 1530 | spp->spp_params = htonl(lport->service_params); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1531 | break; |
| 1532 | default: |
Joe Eykholt | a2f6a02 | 2010-03-12 16:07:36 -0800 | [diff] [blame] | 1533 | resp = FC_SPP_RESP_INVL; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1534 | break; |
| 1535 | } |
Joe Eykholt | a2f6a02 | 2010-03-12 16:07:36 -0800 | [diff] [blame] | 1536 | spp->spp_flags |= resp; |
| 1537 | len -= plen; |
| 1538 | rspp = (struct fc_els_spp *)((char *)rspp + plen); |
| 1539 | spp = (struct fc_els_spp *)((char *)spp + plen); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1540 | } |
Joe Eykholt | a2f6a02 | 2010-03-12 16:07:36 -0800 | [diff] [blame] | 1541 | |
| 1542 | /* |
| 1543 | * Send LS_ACC. If this fails, the originator should retry. |
| 1544 | */ |
| 1545 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; |
| 1546 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; |
| 1547 | ep = fc_seq_exch(sp); |
| 1548 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, |
| 1549 | FC_TYPE_ELS, f_ctl, 0); |
| 1550 | lport->tt.seq_send(lport, sp, fp); |
| 1551 | |
| 1552 | switch (rdata->rp_state) { |
| 1553 | case RPORT_ST_PRLI: |
| 1554 | fc_rport_enter_ready(rdata); |
| 1555 | break; |
| 1556 | default: |
| 1557 | break; |
| 1558 | } |
| 1559 | goto drop; |
| 1560 | |
| 1561 | reject_len: |
| 1562 | rjt_data.reason = ELS_RJT_PROT; |
| 1563 | rjt_data.explan = ELS_EXPL_INV_LEN; |
| 1564 | reject: |
| 1565 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); |
| 1566 | drop: |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1567 | fc_frame_free(rx_fp); |
| 1568 | } |
| 1569 | |
| 1570 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1571 | * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests |
| 1572 | * @rdata: The remote port that sent the PRLO request |
| 1573 | * @sp: The sequence that the PRLO was on |
Bhanu Prakash Gollapudi | f8fc6c2 | 2010-06-11 16:44:04 -0700 | [diff] [blame] | 1574 | * @rx_fp: The PRLO request frame |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1575 | * |
| 1576 | * Locking Note: The rport lock is exected to be held before calling |
| 1577 | * this function. |
| 1578 | */ |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 1579 | static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata, |
| 1580 | struct fc_seq *sp, |
Bhanu Prakash Gollapudi | f8fc6c2 | 2010-06-11 16:44:04 -0700 | [diff] [blame] | 1581 | struct fc_frame *rx_fp) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1582 | { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1583 | struct fc_lport *lport = rdata->local_port; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1584 | struct fc_frame_header *fh; |
Bhanu Prakash Gollapudi | f8fc6c2 | 2010-06-11 16:44:04 -0700 | [diff] [blame] | 1585 | struct fc_exch *ep; |
| 1586 | struct fc_frame *fp; |
| 1587 | struct { |
| 1588 | struct fc_els_prlo prlo; |
| 1589 | struct fc_els_spp spp; |
| 1590 | } *pp; |
| 1591 | struct fc_els_spp *rspp; /* request service param page */ |
| 1592 | struct fc_els_spp *spp; /* response spp */ |
| 1593 | unsigned int len; |
| 1594 | unsigned int plen; |
| 1595 | u32 f_ctl; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1596 | struct fc_seq_els_data rjt_data; |
| 1597 | |
Bhanu Prakash Gollapudi | f8fc6c2 | 2010-06-11 16:44:04 -0700 | [diff] [blame] | 1598 | rjt_data.fp = NULL; |
| 1599 | fh = fc_frame_header_get(rx_fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1600 | |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 1601 | FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n", |
| 1602 | fc_rport_state(rdata)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1603 | |
Bhanu Prakash Gollapudi | f8fc6c2 | 2010-06-11 16:44:04 -0700 | [diff] [blame] | 1604 | len = fr_len(rx_fp) - sizeof(*fh); |
| 1605 | pp = fc_frame_payload_get(rx_fp, sizeof(*pp)); |
| 1606 | if (!pp) |
| 1607 | goto reject_len; |
| 1608 | plen = ntohs(pp->prlo.prlo_len); |
| 1609 | if (plen != 20) |
| 1610 | goto reject_len; |
| 1611 | if (plen < len) |
| 1612 | len = plen; |
| 1613 | |
| 1614 | rspp = &pp->spp; |
| 1615 | |
| 1616 | fp = fc_frame_alloc(lport, len); |
| 1617 | if (!fp) { |
| 1618 | rjt_data.reason = ELS_RJT_UNAB; |
| 1619 | rjt_data.explan = ELS_EXPL_INSUF_RES; |
| 1620 | goto reject; |
| 1621 | } |
| 1622 | |
| 1623 | sp = lport->tt.seq_start_next(sp); |
| 1624 | WARN_ON(!sp); |
| 1625 | pp = fc_frame_payload_get(fp, len); |
| 1626 | WARN_ON(!pp); |
| 1627 | memset(pp, 0, len); |
| 1628 | pp->prlo.prlo_cmd = ELS_LS_ACC; |
| 1629 | pp->prlo.prlo_obs = 0x10; |
| 1630 | pp->prlo.prlo_len = htons(len); |
| 1631 | spp = &pp->spp; |
| 1632 | spp->spp_type = rspp->spp_type; |
| 1633 | spp->spp_type_ext = rspp->spp_type_ext; |
| 1634 | spp->spp_flags = FC_SPP_RESP_ACK; |
| 1635 | |
| 1636 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); |
| 1637 | |
| 1638 | f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ; |
| 1639 | f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT; |
| 1640 | ep = fc_seq_exch(sp); |
| 1641 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid, |
| 1642 | FC_TYPE_ELS, f_ctl, 0); |
| 1643 | lport->tt.seq_send(lport, sp, fp); |
| 1644 | goto drop; |
| 1645 | |
| 1646 | reject_len: |
| 1647 | rjt_data.reason = ELS_RJT_PROT; |
| 1648 | rjt_data.explan = ELS_EXPL_INV_LEN; |
| 1649 | reject: |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1650 | lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data); |
Bhanu Prakash Gollapudi | f8fc6c2 | 2010-06-11 16:44:04 -0700 | [diff] [blame] | 1651 | drop: |
| 1652 | fc_frame_free(rx_fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1653 | } |
| 1654 | |
| 1655 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1656 | * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests |
| 1657 | * @lport: The local port that received the LOGO request |
| 1658 | * @sp: The sequence that the LOGO request was on |
| 1659 | * @fp: The LOGO request frame |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1660 | * |
| 1661 | * Locking Note: The rport lock is exected to be held before calling |
| 1662 | * this function. |
| 1663 | */ |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1664 | static void fc_rport_recv_logo_req(struct fc_lport *lport, |
Joe Eykholt | 9fb9d32 | 2009-08-25 14:00:50 -0700 | [diff] [blame] | 1665 | struct fc_seq *sp, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1666 | struct fc_frame *fp) |
| 1667 | { |
| 1668 | struct fc_frame_header *fh; |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1669 | struct fc_rport_priv *rdata; |
| 1670 | u32 sid; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1671 | |
Joe Eykholt | feab4ae | 2009-08-25 14:03:36 -0700 | [diff] [blame] | 1672 | lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL); |
| 1673 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1674 | fh = fc_frame_header_get(fp); |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1675 | sid = ntoh24(fh->fh_s_id); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1676 | |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1677 | mutex_lock(&lport->disc.disc_mutex); |
| 1678 | rdata = lport->tt.rport_lookup(lport, sid); |
| 1679 | if (rdata) { |
| 1680 | mutex_lock(&rdata->rp_mutex); |
| 1681 | FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n", |
| 1682 | fc_rport_state(rdata)); |
Joe Eykholt | feab4ae | 2009-08-25 14:03:36 -0700 | [diff] [blame] | 1683 | |
Joe Eykholt | b4a9c7e | 2009-10-21 16:28:30 -0700 | [diff] [blame] | 1684 | fc_rport_enter_delete(rdata, RPORT_EV_LOGO); |
Joe Eykholt | 83fe6a9 | 2009-08-25 14:03:31 -0700 | [diff] [blame] | 1685 | mutex_unlock(&rdata->rp_mutex); |
| 1686 | } else |
| 1687 | FC_RPORT_ID_DBG(lport, sid, |
| 1688 | "Received LOGO from non-logged-in port\n"); |
| 1689 | mutex_unlock(&lport->disc.disc_mutex); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1690 | fc_frame_free(fp); |
| 1691 | } |
| 1692 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1693 | /** |
| 1694 | * fc_rport_flush_queue() - Flush the rport_event_queue |
| 1695 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1696 | static void fc_rport_flush_queue(void) |
| 1697 | { |
| 1698 | flush_workqueue(rport_event_queue); |
| 1699 | } |
| 1700 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1701 | /** |
| 1702 | * fc_rport_init() - Initialize the remote port layer for a local port |
| 1703 | * @lport: The local port to initialize the remote port layer for |
| 1704 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1705 | int fc_rport_init(struct fc_lport *lport) |
| 1706 | { |
Joe Eykholt | 8025b5d | 2009-08-25 14:02:06 -0700 | [diff] [blame] | 1707 | if (!lport->tt.rport_lookup) |
| 1708 | lport->tt.rport_lookup = fc_rport_lookup; |
| 1709 | |
Robert Love | 5101ff9 | 2009-02-27 10:55:18 -0800 | [diff] [blame] | 1710 | if (!lport->tt.rport_create) |
Joe Eykholt | 9e9d045 | 2009-08-25 14:01:18 -0700 | [diff] [blame] | 1711 | lport->tt.rport_create = fc_rport_create; |
Robert Love | 5101ff9 | 2009-02-27 10:55:18 -0800 | [diff] [blame] | 1712 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1713 | if (!lport->tt.rport_login) |
| 1714 | lport->tt.rport_login = fc_rport_login; |
| 1715 | |
| 1716 | if (!lport->tt.rport_logoff) |
| 1717 | lport->tt.rport_logoff = fc_rport_logoff; |
| 1718 | |
| 1719 | if (!lport->tt.rport_recv_req) |
| 1720 | lport->tt.rport_recv_req = fc_rport_recv_req; |
| 1721 | |
| 1722 | if (!lport->tt.rport_flush_queue) |
| 1723 | lport->tt.rport_flush_queue = fc_rport_flush_queue; |
| 1724 | |
Joe Eykholt | f211fa5 | 2009-08-25 14:01:01 -0700 | [diff] [blame] | 1725 | if (!lport->tt.rport_destroy) |
| 1726 | lport->tt.rport_destroy = fc_rport_destroy; |
| 1727 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1728 | return 0; |
| 1729 | } |
| 1730 | EXPORT_SYMBOL(fc_rport_init); |
| 1731 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1732 | /** |
| 1733 | * fc_setup_rport() - Initialize the rport_event_queue |
| 1734 | */ |
| 1735 | int fc_setup_rport() |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1736 | { |
| 1737 | rport_event_queue = create_singlethread_workqueue("fc_rport_eq"); |
| 1738 | if (!rport_event_queue) |
| 1739 | return -ENOMEM; |
| 1740 | return 0; |
| 1741 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1742 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1743 | /** |
| 1744 | * fc_destroy_rport() - Destroy the rport_event_queue |
| 1745 | */ |
| 1746 | void fc_destroy_rport() |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1747 | { |
| 1748 | destroy_workqueue(rport_event_queue); |
| 1749 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1750 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1751 | /** |
| 1752 | * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port |
| 1753 | * @rport: The remote port whose I/O should be terminated |
| 1754 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1755 | void fc_rport_terminate_io(struct fc_rport *rport) |
| 1756 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1757 | struct fc_rport_libfc_priv *rpriv = rport->dd_data; |
| 1758 | struct fc_lport *lport = rpriv->local_port; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1759 | |
Abhijeet Joglekar | 1f6ff36 | 2009-02-27 10:54:35 -0800 | [diff] [blame] | 1760 | lport->tt.exch_mgr_reset(lport, 0, rport->port_id); |
| 1761 | lport->tt.exch_mgr_reset(lport, rport->port_id, 0); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1762 | } |
| 1763 | EXPORT_SYMBOL(fc_rport_terminate_io); |