4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (C) 2006 Myricom, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/klnds/mxlnd/mxlnd.h
38 * Author: Eric Barton <eric@bartonsoftware.com>
39 * Author: Scott Atchley <atchley at myri.com>
45 #ifndef AUTOCONF_INCLUDED
46 #include <linux/config.h>
48 #include <linux/module.h> /* module */
49 #include <linux/kernel.h> /* module */
51 #include <linux/string.h>
52 #include <linux/stat.h>
53 #include <linux/errno.h>
54 #include <linux/smp_lock.h>
55 #include <linux/unistd.h>
56 #include <linux/uio.h>
59 #include <asm/system.h>
60 #include <asm/uaccess.h>
63 #include <linux/init.h> /* module */
65 #include <linux/file.h>
66 #include <linux/stat.h>
67 #include <linux/list.h>
68 #include <linux/kmod.h>
69 #include <linux/sysctl.h>
70 #include <linux/random.h>
71 #include <linux/utsname.h>
72 #include <linux/jiffies.h> /* msecs_to_jiffies */
73 #include <asm/semaphore.h>
78 #include <asm/byteorder.h> /* __LITTLE_ENDIAN */
79 #include <net/arp.h> /* arp table */
80 #include <linux/netdevice.h> /* get_device_by_name */
81 #include <linux/inetdevice.h> /* neigh_lookup, etc. */
82 #include <linux/net.h> /* sock_create_kern, kernel_connect, sock_release */
84 #define DEBUG_SUBSYSTEM S_LND
86 #include "libcfs/libcfs.h"
87 #include "lnet/lnet.h"
88 #include "lnet/lib-lnet.h"
89 //#include <lnet/lnet-sysctl.h>
92 #include "mx_extensions.h"
93 #include "myriexpress.h"
95 #if LNET_MAX_IOV > MX_MAX_SEGMENTS
96 #error LNET_MAX_IOV is greater then MX_MAX_SEGMENTS
99 #define MXLND_MSG_MAGIC 0x4d583130 /* unique magic 'MX10' */
100 #define MXLND_MSG_VERSION 0x03
102 /* Using MX's 64 match bits
103 * We are using the match bits to specify message type and the cookie. The
104 * highest four bits (60-63) are reserved for message type. Below we specify
105 * the types. We reserve the remaining combinations for future use. The next 8
106 * bits (52-59) are reserved for returning a status code for failed GET_DATA
107 * (payload) messages. The last 52 bits are used for cookies. That should allow
108 * unique cookies for 4 KB messages at 10 Gbps line rate without rollover for
109 * about 8 years. That should be enough. */
111 #define MXLND_MSG_OFFSET 60 /* msg type offset */
112 #define MXLND_MSG_BITS (64 - MXLND_MSG_OFFSET)
113 #define MXLND_MSG_MASK (((1ULL<<MXLND_MSG_BITS) - 1) << MXLND_MSG_OFFSET)
114 #define MXLND_MSG_TYPE(x) (((x) & MXLND_MSG_MASK) >> MXLND_MSG_OFFSET)
116 #define MXLND_ERROR_OFFSET 52 /* error value offset */
117 #define MXLND_ERROR_BITS (MXLND_MSG_OFFSET - MXLND_ERROR_OFFSET)
118 #define MXLND_ERROR_MASK (((1ULL<<MXLND_ERROR_BITS) - 1) << MXLND_ERROR_OFFSET)
119 #define MXLND_ERROR_VAL(x) (((x) & MXLND_ERROR_MASK) >> MXLND_ERROR_OFFSET)
122 #define MXLND_MSG_ICON_REQ 0xb /* mx_iconnect() before CONN_REQ */
123 #define MXLND_MSG_CONN_REQ 0xc /* connection request */
124 #define MXLND_MSG_ICON_ACK 0x9 /* mx_iconnect() before CONN_ACK */
125 #define MXLND_MSG_CONN_ACK 0xa /* connection request response */
126 #define MXLND_MSG_BYE 0xd /* disconnect msg */
127 #define MXLND_MSG_EAGER 0xe /* eager message */
128 #define MXLND_MSG_NOOP 0x1 /* no msg, return credits */
129 #define MXLND_MSG_PUT_REQ 0x2 /* put request src->sink */
130 #define MXLND_MSG_PUT_ACK 0x3 /* put ack src<-sink */
131 #define MXLND_MSG_PUT_DATA 0x4 /* put payload src->sink */
132 #define MXLND_MSG_GET_REQ 0x5 /* get request sink->src */
133 #define MXLND_MSG_GET_DATA 0x6 /* get payload sink<-src */
135 /* when to roll-over the cookie value */
136 #define MXLND_MAX_COOKIE ((1ULL << MXLND_ERROR_OFFSET) - 1)
138 /* defaults for configurable parameters */
139 #define MXLND_N_SCHED 1 /* # schedulers (mx_wait_any() threads) */
140 #define MXLND_NDAEMONS 3 /* connd, timeoutd, tx_queued */
141 #define MXLND_MX_BOARD 0 /* Use the first MX NIC if more than 1 avail */
142 #define MXLND_MX_EP_ID 0 /* MX endpoint ID */
143 #define MXLND_COMM_TIMEOUT (20 * CFS_HZ) /* timeout for send/recv (jiffies) */
144 #define MXLND_WAIT_TIMEOUT CFS_HZ /* timeout for wait (jiffies) */
145 #define MXLND_CONNECT_TIMEOUT (5 * CFS_HZ) /* timeout for connections (jiffies) */
146 #define MXLND_POLLING 1000 /* poll iterations before blocking */
147 #define MXLND_LOOKUP_COUNT 5 /* how many times to try to resolve MAC */
148 #define MXLND_MAX_PEERS 1024 /* number of nodes talking to me */
150 #define MXLND_MSG_SIZE (4<<10) /* pre-posted eager message size */
151 #define MXLND_MSG_QUEUE_DEPTH 8 /* default msg queue depth */
152 #define MXLND_NTX 256 /* default # of tx msg descriptors */
154 #define MXLND_HASH_BITS 6 /* the number of bits to hash over */
155 #define MXLND_HASH_SIZE (1<<MXLND_HASH_BITS)
156 /* number of peer lists for lookup.
157 we hash over the last N bits of
158 the IP address converted to an int. */
159 #define MXLND_HASH_MASK (MXLND_HASH_SIZE - 1)
160 /* ensure we use only the last N bits */
162 /* derived constants... */
163 /* TX messages (shared by all connections) */
164 #define MXLND_TX_MSGS() (*kmxlnd_tunables.kmx_ntx)
165 #define MXLND_TX_MSG_BYTES() (MXLND_TX_MSGS() * MXLND_MSG_SIZE)
166 #define MXLND_TX_MSG_PAGES() ((MXLND_TX_MSG_BYTES() + PAGE_SIZE - 1)/PAGE_SIZE)
168 /* RX messages (per connection) */
169 #define MXLND_RX_MSGS() (*kmxlnd_tunables.kmx_peercredits)
170 #define MXLND_RX_MSG_BYTES() (MXLND_RX_MSGS() * MXLND_MSG_SIZE)
171 #define MXLND_RX_MSG_PAGES() ((MXLND_RX_MSG_BYTES() + PAGE_SIZE - 1)/PAGE_SIZE)
172 #define MXLND_CREDIT_HIGHWATER() (*kmxlnd_tunables.kmx_peercredits - 2)
173 /* when to send a noop to return credits */
175 /* debugging features */
176 #define MXLND_CKSUM 0 /* checksum kmx_msg_t */
177 #define MXLND_DEBUG 0 /* additional CDEBUG messages */
179 /* provide wrappers around LIBCFS_ALLOC/FREE to keep MXLND specific
180 * memory usage stats that include pages */
182 #define MXLND_ALLOC(x, size) \
184 cfs_spin_lock(&kmxlnd_data.kmx_mem_lock); \
185 kmxlnd_data.kmx_mem_used += size; \
186 cfs_spin_unlock(&kmxlnd_data.kmx_mem_lock); \
187 LIBCFS_ALLOC(x, size); \
188 if (unlikely(x == NULL)) { \
189 cfs_spin_lock(&kmxlnd_data.kmx_mem_lock); \
190 kmxlnd_data.kmx_mem_used -= size; \
191 cfs_spin_unlock(&kmxlnd_data.kmx_mem_lock); \
195 #define MXLND_FREE(x, size) \
197 cfs_spin_lock(&kmxlnd_data.kmx_mem_lock); \
198 kmxlnd_data.kmx_mem_used -= size; \
199 cfs_spin_unlock(&kmxlnd_data.kmx_mem_lock); \
200 LIBCFS_FREE(x, size); \
204 typedef struct kmx_tunables
206 int *kmx_n_waitd; /* # completion threads */
207 int *kmx_max_peers; /* max # of potential peers */
208 int *kmx_cksum; /* checksum small msgs? */
209 int *kmx_ntx; /* total # of tx */
210 int *kmx_credits; /* concurrent sends to all peers */
211 int *kmx_peercredits; /* concurrent sends to 1 peer */
212 int *kmx_board; /* MX board (NIC) number */
213 int *kmx_ep_id; /* MX endpoint number */
214 char **kmx_default_ipif; /* IPoMX interface name */
215 int *kmx_polling; /* if 0, block. if > 0, poll this many
216 iterations before blocking */
221 int mxg_npages; /* # pages */
222 struct page *mxg_pages[0];
225 /* global interface state */
226 typedef struct kmx_data
228 int kmx_init; /* initialization state */
229 cfs_atomic_t kmx_shutdown; /* shutting down? */
230 cfs_atomic_t kmx_nthreads; /* number of threads */
231 cfs_completion_t *kmx_completions; /* array of completion structs */
232 lnet_ni_t *kmx_ni; /* the LND instance */
233 u64 kmx_incarnation; /* my incarnation value */
234 long kmx_mem_used; /* memory used */
235 mx_endpoint_t kmx_endpt; /* the MX endpoint */
236 mx_endpoint_addr_t kmx_epa; /* the MX endpoint address */
238 cfs_rwlock_t kmx_global_lock; /* global lock */
239 cfs_spinlock_t kmx_mem_lock; /* memory accounting lock */
241 cfs_list_t kmx_conn_reqs; /* list of connection requests */
242 cfs_spinlock_t kmx_conn_lock; /* connection list lock */
243 cfs_semaphore_t kmx_conn_sem; /* semaphore for connection request list */
244 cfs_list_t kmx_conn_zombies; /* list of zombie connections */
245 cfs_list_t kmx_orphan_msgs; /* list of txs to cancel */
247 /* list of all known peers */
248 cfs_list_t kmx_peers[MXLND_HASH_SIZE];
249 cfs_atomic_t kmx_npeers; /* number of peers */
251 kmx_pages_t *kmx_tx_pages; /* tx msg pages */
253 struct kmx_ctx *kmx_txs; /* all tx descriptors */
254 cfs_list_t kmx_tx_idle; /* list of idle tx */
255 cfs_spinlock_t kmx_tx_idle_lock; /* lock for idle tx list */
256 s32 kmx_tx_used; /* txs in use */
257 u64 kmx_tx_next_cookie; /* unique id for tx */
258 cfs_list_t kmx_tx_queue; /* generic send queue */
259 cfs_spinlock_t kmx_tx_queue_lock; /* lock for generic sends */
260 cfs_semaphore_t kmx_tx_queue_sem; /* semaphore for tx queue */
263 #define MXLND_INIT_NOTHING 0 /* in the beginning, there was nothing... */
264 #define MXLND_INIT_DATA 1 /* main data structures created */
265 #define MXLND_INIT_TXS 2 /* tx descriptors created */
266 #define MXLND_INIT_MX 3 /* initiate MX library, open endpoint, get NIC id */
267 #define MXLND_INIT_THREADS 4 /* waitd, timeoutd, tx_queued threads */
268 #define MXLND_INIT_ALL 5 /* startup completed */
270 /************************************************************************
271 * MXLND Wire message format.
272 * These are sent in sender's byte order (i.e. receiver flips).
275 typedef struct kmx_connreq_msg
277 u32 mxcrm_queue_depth; /* per peer max messages in flight */
278 u32 mxcrm_eager_size; /* size of preposted eager messages */
279 } WIRE_ATTR kmx_connreq_msg_t;
281 typedef struct kmx_eager_msg
283 lnet_hdr_t mxem_hdr; /* lnet header */
284 char mxem_payload[0]; /* piggy-backed payload */
285 } WIRE_ATTR kmx_eager_msg_t;
287 typedef struct kmx_putreq_msg
289 lnet_hdr_t mxprm_hdr; /* lnet header */
290 u64 mxprm_cookie; /* opaque completion cookie */
291 } WIRE_ATTR kmx_putreq_msg_t;
293 typedef struct kmx_putack_msg
295 u64 mxpam_src_cookie; /* reflected completion cookie */
296 u64 mxpam_dst_cookie; /* opaque completion cookie */
297 } WIRE_ATTR kmx_putack_msg_t;
299 typedef struct kmx_getreq_msg
301 lnet_hdr_t mxgrm_hdr; /* lnet header */
302 u64 mxgrm_cookie; /* opaque completion cookie */
303 } WIRE_ATTR kmx_getreq_msg_t;
305 typedef struct kmx_msg
307 /* First two fields fixed for all time */
308 u32 mxm_magic; /* MXLND message */
309 u16 mxm_version; /* version number */
311 u8 mxm_type; /* message type */
312 u8 mxm_credits; /* returned credits */
313 u32 mxm_nob; /* # of bytes in whole message */
314 u32 mxm_cksum; /* checksum (0 == no checksum) */
315 u64 mxm_srcnid; /* sender's NID */
316 u64 mxm_srcstamp; /* sender's incarnation */
317 u64 mxm_dstnid; /* destination's NID */
318 u64 mxm_dststamp; /* destination's incarnation */
321 kmx_connreq_msg_t conn_req;
322 kmx_eager_msg_t eager;
323 kmx_putreq_msg_t put_req;
324 kmx_putack_msg_t put_ack;
325 kmx_getreq_msg_t get_req;
327 } WIRE_ATTR kmx_msg_t;
329 /***********************************************************************/
336 /* The life cycle of a request */
338 MXLND_CTX_INIT = 0, /* just created */
339 MXLND_CTX_IDLE = 1, /* available for use */
340 MXLND_CTX_PREP = 2, /* getting ready for send/recv */
341 MXLND_CTX_PENDING = 3, /* mx_isend() or mx_irecv() called */
342 MXLND_CTX_COMPLETED = 4, /* cleaning up after completion or timeout */
343 MXLND_CTX_CANCELED = 5, /* timed out but still in ctx list */
346 /* Context Structure - generic tx/rx descriptor
347 * It represents the context (or state) of each send or receive request.
348 * In other LNDs, they have separate TX and RX descriptors and this replaces both.
350 * The txs live on the global kmx_txs array for cleanup. The rxs are managed
351 * per struct kmx_conn. We will move them between the rx/tx idle lists and the
352 * pending list which is monitored by mxlnd_timeoutd().
354 typedef struct kmx_ctx
356 enum kmx_req_type mxc_type; /* TX or RX */
357 u64 mxc_incarnation; /* store the peer's incarnation here
358 to verify before changing flow
359 control credits after completion */
360 unsigned long mxc_deadline; /* request time out in absolute jiffies */
361 enum kmx_req_state mxc_state; /* what is the state of the request? */
362 cfs_list_t mxc_list; /* place on rx/tx idle list, tx q, peer tx */
363 cfs_list_t mxc_rx_list; /* place on mxp_rx_posted list */
365 lnet_nid_t mxc_nid; /* dst's NID if peer is not known */
366 struct kmx_peer *mxc_peer; /* owning peer */
367 struct kmx_conn *mxc_conn; /* owning conn */
368 kmx_msg_t *mxc_msg; /* msg hdr mapped to mxc_page */
369 lnet_msg_t *mxc_lntmsg[2]; /* lnet msgs to finalize */
371 u8 mxc_msg_type; /* what type of message is this? */
372 u64 mxc_cookie; /* completion cookie */
373 u64 mxc_match; /* MX match info */
374 mx_ksegment_t mxc_seg; /* local MX ksegment for non-DATA */
375 mx_ksegment_t *mxc_seg_list; /* MX ksegment array for DATA */
376 int mxc_nseg; /* number of segments */
377 unsigned long mxc_pin_type; /* MX_PIN_PHYSICAL [| MX_PIN_FULLPAGES] */
378 u32 mxc_nob; /* number of bytes sent/received */
379 mx_request_t mxc_mxreq; /* MX request */
380 mx_status_t mxc_status; /* MX status */
381 u32 mxc_errno; /* errno for LNET */
382 u64 mxc_get; /* # of times returned from idle list */
383 u64 mxc_put; /* # of times returned from idle list */
386 #define MXLND_CONN_DISCONNECT -2 /* conn is being destroyed - do not add txs */
387 #define MXLND_CONN_FAIL -1 /* connect failed (bad handshake, unavail, etc.) */
388 #define MXLND_CONN_INIT 0 /* in the beginning, there was nothing... */
389 #define MXLND_CONN_REQ 1 /* a connection request message is needed */
390 #define MXLND_CONN_ACK 2 /* a connection ack is needed */
391 #define MXLND_CONN_WAIT 3 /* waiting for req or ack to complete */
392 #define MXLND_CONN_READY 4 /* ready to send */
394 /* store all data from an unexpected CONN_[REQ|ACK] receive */
395 typedef struct kmx_connparams
397 cfs_list_t mxr_list; /* list to hang on kmx_conn_reqs */
398 void *mxr_context; /* context - unused - will hold net */
399 mx_endpoint_addr_t mxr_epa; /* the peer's epa */
400 u64 mxr_match; /* the CONN_REQ's match bits */
401 u32 mxr_nob; /* length of CONN_REQ message */
402 struct kmx_peer *mxr_peer; /* peer if known */
403 struct kmx_conn *mxr_conn; /* conn if known */
404 kmx_msg_t mxr_msg; /* the msg header & connreq_msg_t */
407 /* connection state - queues for queued and pending msgs */
408 typedef struct kmx_conn
410 struct kmx_peer *mxk_peer; /* owning peer */
411 cfs_list_t mxk_list; /* for placing on mxp_conns */
412 cfs_list_t mxk_zombie; /* for placing on zombies list */
413 u64 mxk_incarnation; /* connections's incarnation value */
414 u32 mxk_sid; /* peer's MX session id */
415 cfs_atomic_t mxk_refcount; /* reference counting */
416 int mxk_status; /* can we send messages? MXLND_CONN_* */
418 mx_endpoint_addr_t mxk_epa; /* peer's endpoint address */
420 cfs_spinlock_t mxk_lock; /* lock */
421 unsigned long mxk_timeout; /* expiration of oldest pending tx/rx */
422 unsigned long mxk_last_tx; /* when last tx completed with success */
423 unsigned long mxk_last_rx; /* when last rx completed */
425 kmx_pages_t *mxk_rx_pages; /* rx msg pages */
426 kmx_ctx_t *mxk_rxs; /* the rx descriptors */
427 cfs_list_t mxk_rx_idle; /* list of idle rx */
429 int mxk_credits; /* # of my credits for sending to peer */
430 int mxk_outstanding; /* # of credits to return */
432 cfs_list_t mxk_tx_credit_queue; /* send queue for peer */
433 cfs_list_t mxk_tx_free_queue; /* send queue for peer */
434 int mxk_ntx_msgs; /* # of msgs on tx queues */
435 int mxk_ntx_data ; /* # of DATA on tx queues */
436 int mxk_ntx_posted; /* # of tx msgs in flight */
437 int mxk_data_posted; /* # of tx data payloads in flight */
439 cfs_list_t mxk_pending; /* in flight rxs and txs */
443 typedef struct kmx_peer
445 cfs_list_t mxp_list; /* for placing on kmx_peers */
446 lnet_nid_t mxp_nid; /* peer's LNET NID */
447 lnet_ni_t *mxp_ni; /* LNET interface */
448 cfs_atomic_t mxp_refcount; /* reference counts */
450 cfs_list_t mxp_conns; /* list of connections */
451 kmx_conn_t *mxp_conn; /* current connection */
452 cfs_list_t mxp_tx_queue; /* msgs waiting for a conn */
454 u32 mxp_board; /* peer's board rank */
455 u32 mxp_ep_id; /* peer's MX endpoint ID */
456 u64 mxp_nic_id; /* remote's MX nic_id for mx_connect() */
458 unsigned long mxp_reconnect_time; /* when to retry connect */
459 int mxp_incompatible; /* incorrect conn_req values */
462 extern kmx_data_t kmxlnd_data;
463 extern kmx_tunables_t kmxlnd_tunables;
465 /* required for the LNET API */
466 int mxlnd_startup(lnet_ni_t *ni);
467 void mxlnd_shutdown(lnet_ni_t *ni);
468 int mxlnd_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg);
469 int mxlnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg);
470 int mxlnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
471 unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov,
472 unsigned int offset, unsigned int mlen, unsigned int rlen);
475 extern void mxlnd_thread_stop(long id);
476 extern void mxlnd_ctx_init(kmx_ctx_t *ctx);
477 extern int mxlnd_peer_alloc(kmx_peer_t **peerp, lnet_nid_t nid,
478 u32 board, u32 ep_id, u64 nic_id);
479 extern int mxlnd_alloc_pages(kmx_pages_t **pp, int npages);
480 extern void mxlnd_free_pages(kmx_pages_t *p);
483 void mxlnd_eager_recv(void *context, uint64_t match_value, uint32_t length);
484 extern mx_unexp_handler_action_t mxlnd_unexpected_recv(void *context,
485 mx_endpoint_addr_t source, uint64_t match_value, uint32_t length,
486 void *data_if_available);
487 extern void mxlnd_peer_free(kmx_peer_t *peer);
488 extern void mxlnd_conn_free_locked(kmx_conn_t *conn);
489 extern void mxlnd_conn_disconnect(kmx_conn_t *conn, int mx_dis, int send_bye);
490 extern int mxlnd_close_matching_conns(lnet_nid_t nid);
491 extern void mxlnd_sleep(unsigned long timeout);
492 extern int mxlnd_tx_queued(void *arg);
493 extern void mxlnd_handle_rx_completion(kmx_ctx_t *rx);
494 extern int mxlnd_check_sends(kmx_peer_t *peer);
495 extern int mxlnd_tx_peer_queued(void *arg);
496 extern int mxlnd_request_waitd(void *arg);
497 extern int mxlnd_unex_recvd(void *arg);
498 extern int mxlnd_timeoutd(void *arg);
499 extern int mxlnd_free_conn_zombies(void);
500 extern int mxlnd_connd(void *arg);
501 extern int mxlnd_del_peer(lnet_nid_t nid);
505 * mxlnd_nid_to_hash - hash the nid
508 * Takes the u64 nid and XORs the lowest N bits by the next lowest N bits.
511 mxlnd_nid_to_hash(lnet_nid_t nid)
513 return (nid & MXLND_HASH_MASK) ^
514 ((nid & (MXLND_HASH_MASK << MXLND_HASH_BITS)) >> MXLND_HASH_BITS);
518 #define mxlnd_peer_addref(peer) \
520 LASSERT(peer != NULL); \
521 LASSERT(cfs_atomic_read(&(peer)->mxp_refcount) > 0); \
522 cfs_atomic_inc(&(peer)->mxp_refcount); \
526 #define mxlnd_peer_decref(peer) \
528 LASSERT(cfs_atomic_read(&(peer)->mxp_refcount) > 0); \
529 if (cfs_atomic_dec_and_test(&(peer)->mxp_refcount)) \
530 mxlnd_peer_free(peer); \
533 #define mxlnd_conn_addref(conn) \
535 LASSERT(conn != NULL); \
536 LASSERT(cfs_atomic_read(&(conn)->mxk_refcount) > 0); \
537 cfs_atomic_inc(&(conn)->mxk_refcount); \
541 #define mxlnd_conn_decref(conn) \
543 LASSERT(conn != NULL); \
544 LASSERT(cfs_atomic_read(&(conn)->mxk_refcount) > 0); \
545 if (cfs_atomic_dec_and_test(&(conn)->mxk_refcount)) { \
546 cfs_spin_lock(&kmxlnd_data.kmx_conn_lock); \
547 LASSERT((conn)->mxk_status == MXLND_CONN_DISCONNECT); \
548 CDEBUG(D_NET, "adding conn %p to zombies\n", (conn)); \
549 cfs_list_add_tail(&(conn)->mxk_zombie, \
550 &kmxlnd_data.kmx_conn_zombies); \
551 cfs_spin_unlock(&kmxlnd_data.kmx_conn_lock); \
552 cfs_up(&kmxlnd_data.kmx_conn_sem); \
556 #define mxlnd_valid_msg_type(type) \
558 LASSERT((type) == MXLND_MSG_EAGER || \
559 (type) == MXLND_MSG_ICON_REQ || \
560 (type) == MXLND_MSG_CONN_REQ || \
561 (type) == MXLND_MSG_ICON_ACK || \
562 (type) == MXLND_MSG_CONN_ACK || \
563 (type) == MXLND_MSG_BYE || \
564 (type) == MXLND_MSG_NOOP || \
565 (type) == MXLND_MSG_PUT_REQ || \
566 (type) == MXLND_MSG_PUT_ACK || \
567 (type) == MXLND_MSG_PUT_DATA || \
568 (type) == MXLND_MSG_GET_REQ || \
569 (type) == MXLND_MSG_GET_DATA); \