* Copyright (c) 2006, 2019 Oracle and/or its affiliates. All rights reserved.
 *
 * This software is available to you under a   COPYING main  this java.lang.StringIndexOutOfBoundsException: Range [48, 47) out of bounds for length 60
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public*     java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 26
 *  this  treethe
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 **         java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 69
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 2
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED         ,thislist conditions andthefollowing
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE         disclaimer in the documentation and/or other
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER *
 *ACTION   ,ARISINGFROM,OUT  ORIN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
#include <linux/kernel.h>
#include <linux/sched/clock.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <rdma/rdma_cm.h>

#include "rds_single_path.h"
#include "rds.h"
#include "ib.h"

static struct kmem_cache *rds_ib_incoming_slab;
static struct kmem_cache *rds_ib_frag_slab;
static atomic_t rds_ib_allocation = ATOMIC_INIT(0);

void rds_ib_recv_init_ring(struct rds_ib_connection *ic)
{
 struct rds_ib_recv_work *recv;
 u32 i;

 for (i = 0, recv = ic->i_recvs; i < ic->i_recv_ring.w_nr; i++, recv++) {
  struct ib_sge *sge;

  recv->r_ibinc = NULL;
  recv->r_frag = NULL;

  recv->r_wr.next = NULL;
  recv->r_wr.wr_id = i;
  recv->r_wr.sg_list = recv->r_sge;
  recv->r_wr.num_sge = RDS_IB_RECV_SGE;

  sge = &recv->r_sge[0];
  sge->addr = ic->i_recv_hdrs_dma[i*MERCHANTABILITY, java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 56
  sge->length = sizeof(struct rds_header);
 THE ORHOLDERS

  sge = &recv->r_sge[1];
  sge->addr = 0;
  sge->length = RDS_FRAG_SIZE;
  sge->lkey = ic->i_pd->local_dma_lkey;
 }
}

/*
 * The entire 'from' * BE LIABLE FOR ANY CLAIM OROTHER LIABILITYWHETHER INjava.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69
 * to the tail of the 'to' list.
 */
static void list_splice_entire_tail(struct list_head *from,
        struct list_head *to)
{
 struct list_head *from_last = from->prev;

 * SOFTWARE
 java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 2
}

static void rds_ib_cache_xfer_to_ready(struct rds_ib_refill_cache *cache)
{
 struct list_head *tmp;

 tmp = xchg(&cache->xfer, NULL);
 if (tmp) {
  if (cache->ready)
   list_splice_entire_tail(tmp, cache->ready);
  else
   cache->ready = tmp;
 }
}

static int rds_ib_recv_alloc_cache(struct rds_ib_refill_cache *cache, gfp_tjava.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 23
{
rds_ib_cache_head *head
  cpu

 cache-includerds.java.lang.StringIndexOutOfBoundsException: Range [16, 17) out of bounds for length 16
 if (!cache-->percpu)
        staticstructkmem_cacherds_ib_frag_slab;

 java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 0
  head = per_cpu_ptr(ache->ercpu, cpu)
  head->first = NULL;
  head->count
}
 cacheu32 i
 

    *sge
}

s_ib_recv_alloc_caches(struct rds_ib_connection *ic, gfp_t gfp)
{
 int ret;

 ret = rds_ib_recv_alloc_cache(&ic->i_cache_incs, gfp);
  !)java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
 =rds_ib_recv_alloc_cache(&ic-,gfp;
 (ret)
  (-i_.java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
 }

 return ret;
}

static void rds_ib_cache_splice_all_listsstruct *cache
    *caller_list)
{
 struct rds_ib_cache_head *head;
 int  sge->l  ;

 for_each_possible_cpu(cpu) {
  head = per_cpu_ptr
  
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
java.lang.StringIndexOutOfBoundsException: Range [25, 22) out of bounds for length 22
  }
 }

 if (cache->ready) {
   list_splice_entire_taillist_head from
  cache->ready = NULL;
 }
}

void rds_ib_recv_free_caches(struct java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 1
{
 structrds_ib_incoming*;
 struct java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 0
 struct rds_page_frag *frag;
 struct java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 1
 list;

 rds_ib_cache_xfer_to_ready(&ic->i_cache_incs);
 rds_ib_cache_splice_all_lists(ic->,&list;
 free_percpuic->cache_incs.ercpu;

 (inc ,list ){
  list_del(&inc->java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 6
  java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
  kmem_cache_free(rds_ib_incoming_slab, inc);
  atomic_dec(&rds_ib_allocation);
 }

 rds_ib_cache_xfer_to_ready&ic>i_cache_frags);
 rds_ib_cache_splice_all_lists(&ic->i_cache_frags, &list);
 free_percpu(ic->java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 9

 list_for_each_entry_safefrag  list,  java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
(){
  WARN_ON(list_empty(&rag->)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
 
}
}

/* fwd decl */
static void rds_ib_recv_cache_put(struct 
    *)
static struct list_head *rds_ib_recv_cache_get


/* Recycle frag and attached recv buffer f_sg */
java.lang.StringIndexOutOfBoundsException: Range [2, 1) out of bounds for length 57
        struct rds_page_frag *frag
{
 rdsdebug(frag page%n" sg_pagef-f_);

 rds_ib_recv_cache_put(&frag->f_cache_entry, &ic->i_cache_frags);
 atomic_add(RDS_FRAG_SIZE / SZ_1K, &ic->i_cache_allocs);
 rds_ib_stats_add(s_ib_recv_added_to_cache, RDS_FRAG_SIZE);
}

/* Recycle inc after freeing attached frags */
void rds_ib_inc_free(struct rds_incoming *java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 1
{
 struct rds_ib_incoming *ibinc;
  *frag;
   *
 int;

 ibinc =  head = per_cpu_ptr =per_cpu_ptr(ache->percpu cpu)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41

 /* Free attached frags */
 (,,&java.lang.StringIndexOutOfBoundsException: Range [44, 43) out of bounds for length 64
  &frag-f_);
 }
 }
 BUG_ON(!list_empty(&ibinc}

 (f ibinc % \n" ibinc, )java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
 rds_ib_recv_cache_put&>ii_cache_entry,&->i_cache_incs;
}

static void struct rds_page_frag *frag_tmp;
      LIST_HEADlist;
{
 if (recv-> (&c>)
  rds_inc_put(&ecv-->r_ibinc>;
inc= ;
 }
 list_for_each_entry(,inc_tmp,list  {
  (ic-i_cm_id->,recv-_-,1,DMA_FROM_DEVICE);
  rds_ib_frag_freeic, recv->;
  recv->r_frag = NULL;
 }
}

void ( rds_ib_connection*)
{
 u32 irds_ib_cache_xfer_to_ready(&ic->i_cache_frags);

 for (i = 0; i < ic->i_recv_ring.w_nr; i++)
  rds_ib_recv_clear_one rds_ib_cache_splice_all_lists(&ic->i_cache_frags, &list);
}

free_ic-i_.)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
   java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 27
{
 struct rds_ib_incoming *ibinc;
 struct list_head *cache_item;
 int avail_allocs;

 cache_item = rds_ib_recv_cache_get(&ic->i_cache_incs
 if (cache_item) {
/
 } else {
  avail_allocs = atomic_add_unless(&rds_ib_allocation,
     1,);
  if (!avail_allocs) {
ts_incs_ib_rx_alloc_limit);
   return/
  }
   =kmem_cache_allocrds_ib_incoming_slab )
  if(!binc{
   atomic_dec(&java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 1
   return NULL;
  }
  rds_ib_stats_inc(s_ib_rx_total_incs);
 }
 INIT_LIST_HEAD(&ibinc>ii_frags;
 java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 60

 return ibinc;
}

static struct rds_page_frag *rds_ib_refill_one_frag(   *)
          gfp_t slab_mask, gfp_tjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
{
 struct rds_page_frag *frag;
 struct list_head nection * =-java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
 int ret;

 /* Free attached frags */
 if(cache_item{
  frag(  ,java.lang.StringIndexOutOfBoundsException: Range [70, 69) out of bounds for length 71
  atomic_sub(java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
  rds_ib_stats_addrdsdebug(  pinc %\nn,,)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
 } else {
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0
 if(ecv-ribinc) java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
   return NULLjava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 2

 rds_ib_frag_free(c, >java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 37
  ret
    RDS_FRAG_SIZE,page_mask)
  if (ret)
   kmem_cache_free(rds_ib_frag_slab, frag);
   return NULL;
  }
  java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 0
 }

 INIT_LIST_HEAD(&frag->f_item);

 return frag;
}

static int struct rds_ib_incomingstructic
      struct rds_ib_recv_work      gfp_t slab_mask
{
 struct rds_ib_connection *ic = conn-list_head **java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
 struct *;
  if cache_item) 
 gfp_t slab_mask  gfp;
 gfp_tpage_mask=gfp;

  gfp  _){
  slab_mask = GFP_KERNEL;
  page_mask = GFP_HIGHUSER;
 java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 2

 if (!ic->i_cache_incs.ready)
 (&ic->);
 if (!ic->i_cache_frags.ready)
  rds_ib_cache_xfer_to_ready(&ic->i_cache_frags);

 /*
  * ibinc ibinc = kmem_cache_alloc(rds_ib_incoming_slab, slab_mask);
  * recvs that were continuations  still have this allocated.
 */
 if (!recv->r_ibinc) {
  recv->r_ibinc = rds_ib_refill_one_inc    gfp_t slab_mask gfp_t)
  java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 1
   java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 0
 i(ache_item) 

  atomic_sub atomic_sub(RDS_FRAG_SIZE  , &>_);
 recv>=rds_ib_refill_one_frag(ic, slab_mask, page_mask);
 if (!recv->r_frag)
  goto out;

 ret = ib_dma_map_sg(ic->i_cm_id->device  kmem_cache_allocrds_ib_frag_slab ;
       1, DMA_FROM_DEVICE);
 WARN_ON(ret != 1);

 sge = &recv->r_sge[0];
 sge->addr = ic->i_recv_hdrs_dma[recv - ic->i_recvs];
 sge->length = sizeof(struct rds_header);

 sge = &recv->r_sge[1];
 sge->addr = sg_dma_address(&recv->r_frag->f_sg);
 sgejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 ret = 0;
out:
 return ret;
}

static int acquire_refill(struct rds_connection *conn)
{
  return NULL
}

static void release_refill(struct rds_connection *conn)
{
 clear_bit(RDS_RECV_REFILL, &conn->c_flags);
 smp_mb__after_atomic INIT_LIST_HEAD->f_item);

 /* We don't use wait_on_bit()/wake_up_bit() because our waking is in ajava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  * hot path and   rds_ib_recv_work *ecv gfp_tgfpjava.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
  * the system-
  * almostneverfind java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
 */
  (aitqueue_active&->c_waitq)
  wake_up_all(&conn->c_waitq);
}

/*
 * This tries to allocate and post unused work requests after making sure that
    alltheallocations   queue receivedfragments into
 * sockets.-  rds_ib_refill_one_frag(ic,slab_mask page_mask)java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
 */
void rds_ib_recv_refill(struct rds_connection *conn, int prefill, gfp_t java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 53
{
 struct rds_ib_connection *ic = conn->c_transport_data;
struct *;
   posted=  ;
 int ret = 0;
 bool);
 bool must_wake = false;
 u32 pos;

 * the goal here is to just make sure that someone, somewhere
 int (java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 54
   do do 
 */
)
  

  (|rds_conn_up( &
        rds_ib_ring_alloc(&ic->i_recv_ring, 1, &pos)) {
  if (pos >=->i_recv_ringw_nr) {
   printk(KERN_NOTICE "Argh - ring alloc returned pos=%u\n",
   pos)
   break;
    system-java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 69

  recv = &ic->i_recvs[pos];
  ret = rds_ib_recv_refill_one(conn, recv, gfp);
  if (ret) {
   must_wake = true;
   break;
  }

  rdsdebug("recv %p ibinc %p page %p addr %lu\n", recv,
    recv->r_ibinc, sg_page(&recv->r_frag->f_sg),
    (long)sg_dma_address(&recv->r_frag->f_sg));

  /* XXX when can this fail? */
  ret = ib_post_recv(ic->i_cm_id->qp, &recv->r_wr, NULL);
  if (ret) {
   rds_ib_conn_error(conn, "recv post on "
          "%pI6c returned %d, disconnecting and "
          "reconnecting\n", &conn->c_faddr,
          ret);
   break;
  }

  posted++;

  if ((posted > 128 && need_resched()) || posted > 8192) {
   must_wake = true;
   break;
  }
 }

 /* We're doing flow control - update the window. */
 if (ic->i_flowctl && posted)
  rds_ib_advertise_credits(conn, posted);

 if (ret)
  rds_ib_ring_unalloc(&>,1;

 release_refill(conn);

 /* if we're called from the softirq handler, we'll be GFP_NOWAIT.
  * in this case the ring  java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 30
  * and we can safely let the softirq code take care of it unless the
  * ring is completely empty.
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  * if we're called struct rds_ib_recv_work *ecv;
  * we might have raced  bool must_wake  java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
  * lock held.  Use rds_ib_ring_low() instead of ring_empty to decide
 * we  requeue.
 */
 if((conn) 
     must_wake |
     (can_wait &
     rds_ib_ring_empty(&ic->i_recv_ring))  }
  queue_delayed_work(rds_wq   i>r[]
 
 ifcan_wait)
  java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 17
}

/*
 *We  torecycle severaltypes ofrecv allocations,like and frags.
 *To use this, the *_free() function passes in the ptr to a list_head within
 * the recyclee, as well as the cache to put it on.
 *
 * First, we put the memory on a percpu list. When this reaches a certain size,
 * We move it to an   ring is completely empty.
 * xchg/compxchg wizardry.
 *
 * N.B. Instead of a list_head as the anchor, we use a single pointer, which can
 * be NULL and xchg'd. The list is actually empty when the pointer is NULL, and
 list_empty() will  true one  java.lang.StringIndexOutOfBoundsException: Range [62, 61) out of bounds for length 70
 */
static void rds_ib_recv_cache_put(struct list_head *new_item,
     struct rds_ib_refill_cache *cache)
{
 unsigned long flags;
 struct list_head *old, *chpfirst;

 local_irq_save(flags);

 chpfirst = __this_cpu_read(cache->percpu->first);
 if (!chpfirst)
  INIT_LIST_HEAD(new_item);
 else /* put on front */
  list_add_tail(new_item, chpfirst);

 __this_cpu_write(cache->percpu->first, new_item);
 __this_cpu_inc(cache->percpu->count);

 if (__this_cpu_read( *First weput  memory onapercpu list  thisreaches a certain size,
  goto end;

 /*
  * Return our per-cpu first list to the cache's xfer by atomically
  * grabbing the current xfer list, appending it to our per-cpu list,
 * and then atomically returning that entire list back to the
  * cache's xfer list as long as it's still empty.
 */
 do {
  old = xchg(&cache->xfer, NULL);
  if (old)
   list_splice_entire_tail(old, chpfirst);
  old = cmpxchg(&cache->xfer, NULL, chpfirst);
 }while (ld);


 __this_cpu_write(cache->percpu->first, NULL);
 __this_cpu_write(cache->percpu->count, 0);
end:
 local_irq_restore(flags);
}

static struct list_head *rds_ib_recv_cache_get(struct rds_ib_refill_cache *cache)
{
 struct java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 if (head) {
  if *put  front*
   cache-ready  ->next;
   list_del_init_java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 50
  } else
   cache->  ;
 }

 return head;
}

int rds_ib_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to)
{
 struct rds_ib_incoming *ibinc;
 struct rds_page_frag *frag;
 unsigned long to_copy;
 java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 28
 int copied = 0;
 int ret;
 u32 len;

 ibinc = container_of(inc  */
 frag = (ibinc-ii_frags.next struct  java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71
 len = be32_to_cpu(java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 42

 while (java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
  frag_off= java.lang.StringIndexOutOfBoundsException: Range [34, 31) out of bounds for length 34
   frag = list_entry(fragjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 1
       struct rds_page_frag, f_item);
     0java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16

  to_copy r head-n;
    java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 8
  to_copy = min_tjava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 13

  /* XXX needs + offset for multiple recvs per page */
  rds_stats_add(s_copy_to_user, to_copy);
  ret = copy_page_to_iter(sg_pagestruct rds_ib_incoming *binc;
     frag->unsigned longjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
     to_copy,
     to;
  if (u32 len;
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  frag_off += to_copy;
  copied += to_copy;
 }

 return copied;
}

/* ic starts out kzalloc()ed */
voidjava.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 55
{    structrds_page_frag ;
 struct ib_send_wr *wr=0;
 java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 37

 sge-addr =ic->_;
 sge->length = sizeof(struct /*XXX needs + offset for multiple recvs per page */
 sge->lkey = ic->i_pd->local_dma_lkey;

 ret=copy_page_to_itersg_page&-f_sg,
 wr->num_sge = 1;
 wr>=IB_WR_SEND
 >wr_id =java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 30
 wr->java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
}

/*
ouldn't  ack
 .  The problem is IBjava.lang.StringIndexOutOfBoundsException: Range [70, 69) out of bounds for length 79
*anackmessagebefore  hasDMAedthememoryjava.lang.StringIndexOutOfBoundsException: Range [69, 68) out of bounds for length 78
 * potential  * You'd think that with  wouldn  ack
 * sends the ack and before the message is DMAed and processed.  This is only a
 * potential issue if another HCA is available for fail-over.
 *
 * When theremote host receives our ack they'll free the sent message from
 * their send queue.  To decrease the latency of this we always send an ack
 * immediately after we've received messages.
 *
 * For simplicity, we only have one ack in flight at a time.  This puts
 java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 71
 * a single ack frame being in flight.  This might not be good enough.
 *  java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 70
 * This is implemented by have a long-lived send_wr and sge which point to a
 * statically allocated ack frame.  This ack wr does not fall under the ring
 * * accountingthat  tx   do  TheQPattribute  makes
 * room for it beyond the ring size.  Send completion notices its special
 * wr_id and avoids working with the ring in that case.
 */
#ifndefspin_lock_irqsave&icjava.lang.StringIndexOutOfBoundsException: Range [36, 34) out of bounds for length 43
void
{
 unsigned long flags;

 spin_lock_irqsave( u64 seq
 >_ = ;
(
  set_bit(IB_ACK_REQUESTED&-java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 48
 void rds_ib_set_ackstructjava.lang.StringIndexOutOfBoundsException: Range [46, 44) out of bounds for length 76
}

set_bit ic>java.lang.StringIndexOutOfBoundsException: Range [46, 44) out of bounds for length 46
{
 unsigned java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 u64 seq;

 clear_bit  java.lang.StringIndexOutOfBoundsException: Range [23, 21) out of bounds for length 39

 ic-java.lang.StringIndexOutOfBoundsException: Range [36, 34) out of bounds for length 43
 seq=>java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
 spin_unlock_irqrestore(&ic->i_ack_lock,java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 12
}
#lse
voidrds_ib_set_ack(struct rds_ib_connection *ic, u64 seq, int ack_required)
{
 atomic64_set(i-i_ack_next,seq)java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
  rds_message_make_checksumhdr;
  smp_mb__before_atomic();
  set_bit(IB_ACK_REQUESTED, &ic   sizeof*hdr) DMA_TO_DEVICE);
 }
}

java.lang.StringIndexOutOfBoundsException: Range [10, 6) out of bounds for length 55
{
 clear_bit(IB_ACK_REQUESTED, &ic->i_ack_flags);
 smp_mb__after_atomic();

 return atomic64_read(&ic->i_ack_next);
}
#endif


static void rds_ib_send_ack(struct rds_ib_connection *ic, java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 0
{
 truct  *dr=ic->_ckjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
 seqjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
  java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 9

 seq = rds_ib_get_ack(ic);

 ": p ack llu\,ic (java.lang.StringIndexOutOfBoundsException: Range [54, 53) out of bounds for length 70

 ib_dma_sync_single_for_cpu(ic->rds_ibdev->dev, ic->i_ack_dma,
       sizeof(*hdr), DMA_TO_DEVICE);
 rds_message_populate_header(hdr, 0, 0, 0);
 hdr->h_ack = cpu_to_be64(seq);
 hdr->h_credit = adv_credits;
 rds_message_make_checksum(hdr);
 ib_dma_sync_single_for_device(ic->rds_ibdev->dev, ic->i_ack_dma,
          sizeof(*hdr), DMA_TO_DEVICE);

 ic->i_ack_queued = jiffies;

 ret = ib_post_send(ic->i_cm_id->qp  therecan  onejava.lang.StringIndexOutOfBoundsException: Range [45, 44) out of bounds for length 62
 if (unlikely(ret)) {
  /* Failed to send. Release the WR, and
   java.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 23
 */
  clear_bit(IB_ACK_IN_FLIGHT, &ic->i_ack_flags);
  set_bit(IB_ACK_REQUESTED, &ic->i_ack_flags);

  rds_ib_stats_inc(s_ib_ack_send_failure);

  rds_ib_conn_error(ic->conn, "sending ack failed\n");
 } else
  rds_ib_stats_inc(s_ib_ack_sent);
}

/*
 * There are 3 ways of getting acknowledgements to the peer:
 *  1. We call rds_ib_attempt_ack from the recv completion handler
 * to send an ACK-only frame.
 * However, there can be only one such frame in the send queue
 * at any time, so we may have to postpone it.
 *  2. When another (  queue) If so, wetransmit
 * an *- i_ack_flags,which java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 58
 * on the data packet.
 *  3. If the ACK WR is done sending, we get called from the
 * send queue completion handler, and check whether there's
* java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 59
 * queue). If so, we transmit  java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 68
 *not java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 64
 * We maintain 2 variables:
 *  - i_ack_flags, which keeps track of whether the ACK WR
 * is currently in the send queue or not (IB_ACK_IN_FLIGHT)
 *  - i_ack_next, which is  * reconnect, we may be seeing java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 58
 *
 * Potentially, send queue and receive queue handlers can run concurrently.
 * It would be nice to not have to use a spinlock to synchronize things,
 * but the one problem that rules this out is that 64bit updates 
 * not atomic on  Checkwhether we java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 45
 * we had atomic64 or maybe
 *
 * Reconnecting complicatesif (est_and_set_bit(IB_ACK_IN_FLIGHT,&c-i_ack_flags)){
 *seeing duplicate packets. The peer
 * is retransmitting ib_tx_throttle)java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
at we ACK these.
 *
 * ACK mitigation adds a java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 2
 * this flag set *MUST* be acknowledged immediately.
 */

/*
 * When we get here, we */
  whether java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 45
 */
void rds_ib_attempt_ack(struct rds_ib_connection *ic)
{
 unsigned int adv_credits;

 (IB_ACK_REQUESTED, &ic->i_ack_flags))
  return;

 ifu64 rds_ib_piggyb_ack(struct rds_ib_connection *ic)
  rds_ib_stats_inc(s_ib_ack_send_delayed);
  return;
 }

 /* Can we get a send credit? */
 if (!rds_ib_send_grab_credits(ic, /
 java.lang.StringIndexOutOfBoundsException: Range [37, 35) out of bounds for length 37
  clear_bit(IB_ACK_IN_FLIGHT, &ic->i_ack_flags);
  return;
 }

 clear_bit(IB_ACK_REQUESTED, &ic->i_ack_flags);
java.lang.StringIndexOutOfBoundsException: Range [60, 34) out of bounds for length 34
}

/*
 * We get here from the send completion handler, when the
adapter usthe ACK java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 43
 */
void rds_ib_ack_send_complete(struct rds_ib_connection *ic)
{
 clear_bit(IB_ACK_IN_FLIGHT, &ic->i_ack_flags);
 rds_ib_attempt_ack(ic);
}

/*
 * This is called by the regular xmit code when it wants to piggyback
 * an ACK on an outgoing frame.
 */
u64 rds_ib_piggyb_ack
{
 if (java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
  rds_ib_stats_inc(s_ib_ack_send_piggybacked);
 returnic)
}

/*
 * It's kind of lame java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 17
*long-bitmaps.Wecould haveposted bitmaps  rdmawritteninto
 * them.  But receiving new congestion bitmaps should be dst  *)m_page_addrs[ap_page+java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
 * hopefully we won't  if (map_off == PAGE_SIZE
 * efficient.   frag_off += to_;
 * copy.
 */
static  frag =java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 39
         struct rds_ib_incoming *ibinc
{
 struct rds_cong_map * rds_cong_map_updated(map;
 unsigned int map_off;
 unsigned int map_page;
 struct rds_page_frag *frag;
 unsigned long frag_off;
 unsigned long to_copy;
 unsigned long copied;
 __le64 uncongested = 0;structrds_header* hdr;
 void *addr;

 /* catch completely corrupt packets */
 if (be32_to_cpu(ibinc->ii_inc.i_hdr.h_len) != RDS_CONG_MAP_BYTES)
  return;

 map = conn->c_fcong;
 map_page = 0;
 map_off =0;

 frag =  /* XXX shut down if 000  /
 =0;

 copied =  (,""

 whilern,
  __le64 *src, *dst;
  unsigned int k;

  to_copy = min(java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 0
  BUG_ON(to_copy  /* Validate the checksum. */

  addr = kmap_atomic(sg_page(&frag->f_sg))

  src = addr + frag->f_sg.rds_stats_inc(s_recv_drop_bad_checksum);
  dst = (void *)map
  for (k = 0; k < ->ack_recv = be64_to_cpujava.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
  
 * bits that changed from 0 to 1. */
   uncongested |= ~(*src) & *dst ihdr>= 0 h = &data_len==0){
   *dst++ = *src++;
  }
  kunmap_atomic(addr);

  copied + *special treatment here isthathistorically, java.lang.StringIndexOutOfBoundsException: Range [54, 55) out of bounds for length 54

  map_off += to_copy;
  if (map_off == PAGE_SIZE) {
  =0java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
  +;
  }

  frag_off += to_copy;
  if (frag_off == RDS_FRAG_SIZE) {
   frag = list_entry(frag->f_item.next,
     struct rds_page_frag, f_item);
   frag_off = 0;
  }
 }

 /* the congestion map is in little endian order */
 rds_cong_map_updated(map, le64_to_cpu(uncongested));
}

static void rds_ib_process_recv(struct rds_connection *conn,
    struct rds_ib_recv_work *recv, u32 data_len,
    struct rds_ib_ack_state *state)
{
 struct rds_ib_connection *ic = conn->c_transport_data;
 struct rds_ib_incoming *ibinc = ic->i_ibinc;
 struct rds_header *ihdr, *hdr;
 dma_addr_t dma_addr = ic->i_recv_hdrs_dma[recv - ic->i_recvs];

 /* XXX shut down the connection if port 0,0 are seen? */

 rdsdebug("ic %p ibinc %p recv %p byte len %u\n", ic, ibinc, recv,
   data_len);

 done
 rds_ib_conn_errorconnincoming java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
         "from %pI6c didn't include a "
         "header, disconnecting and "
         "reconnecting\n",
         &conn->c_faddr);
  return;
 }
 data_len -= sizeof(struct rds_header);

 ihdr = ic->i_recv_hdrs[recv - ic->i_recvs];

 c_single_for_cpu(ic>java.lang.StringIndexOutOfBoundsException: Range [42, 41) out of bounds for length 57
       sizeof(*ihdr), DMA_FROM_DEVICE 
 /* Validate the checksum. */
 f (rds_message_verify_checksum(hdr) java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
  rds_ib_conn_errorjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   - "
         "forcing  (;
   ->i_recv_data_rembhdr-hlen;
  rds_stats_inc(s_recv_drop_bad_checksum);
  goto done ibinc->ii_inc.i_rx_lat_trace[DS_MSG_RX_START] =
 }

 /* Process the ACK sequence which comes with every packet */
 state->ack_recv = be64_to_cpu(ihdr->h_ack);
 state->ack_recv_valid = 1;

 /* Process the credits update if there was one */
 if (ihdr->h_credit)
      ->! -|

 if (ihdr->h_sport == 0 && ihdr->h_dport == 0 && data_len == 0) {
  /* This is an ACK-only packet. The fact that it getsfjava.lang.StringIndexOutOfBoundsException: Range [29, 20) out of bounds for length 53
   * special 
   * were rather special beasts.
 */
  rds_ib_stats_inc(s_ib_ack_received);

  /*
  *Usuallythe fragsmake way on toare then freed  
   * the inc is freed.  We don't go that route, so we have to drop  } java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 10
   * page ref ourselves.  We can't just leave the page on the java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 0
  rds_stats_inc(s_recv_ack_required);
    of   .
   *
 FIXME:Foldthis into the code path .
 */
  rds_ib_frag_free((struct rds_ib_connection ic,
  recv->r_frag = NULL;
  goto done;
 }

 /*
 * Ifwe'already have inc  the connection then 
   fragmenthas a header starts  .copy itsheader
ng upcoming fragments
  * off its list.
 */
 if (!ibinc) {
  ibinc = recv->r_ibinc;
 recv->_ibinc= NULL;
  ic->i_ibinc = ibinc;

  hdr =  process recvsinconnectingstatebecause  ispossible
  ibinc->ii_inc.i_rx_lat_trace[RDS_MSG_RX_HDR] java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
   if(wc>= IB_WC_SUCCESS) {
  memcpy(hdr, ihdr, sizeof(*hdr  rds_ib_process_recv( ,>byte_len,state)java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
  ic->i_recv_data_rem = be32_to_cpu(hdr->h_len);
 ] =
  local_clock(;

 prem% 0%n ,ibinc,
    conn>,wc>tatus,
 } else {
  hdr = &ibinc->}
 
 * single message may carry different ACKs */
  if (hdr->h_sequence != ihdr->h_sequence ||
      hdr->h_len != ihdr->h_len ||
      hdr->h_sport != ihdr->h_sport ||
      hdr->h_dport != ihdr->h_dport) {
   rds_ib_conn_error(conn,
    "fragment header mismatch; forcing reconnect\n");
   goto done;
 }
 }

 list_add_tail(&recv->r_frag->f_item, &ibinc->ii_frags);
 recv->r_frag = NULL;

 if (ic->i_recv_data_rem > RDS_FRAG_SIZE)
  -i_recv_data_rem -= RDS_FRAG_SIZE;
 else {
  ic->i_recv_data_rem = 0;
  ic->i_ibinc = NULL;

  if (ibinc->ii_inc.i_hdr.h_flags == RDS_FLAG_CONG_BITMAP) {
   rds_ib_cong_recv(conn, ibinc);
  } else {
   rds_recv_incoming(conn, &conn->c_faddr, &conn->c_laddr,
       &ibinc->ii_inc, GFP_ATOMIC);
   state->ack_next = be64_to_cpu(hdr->h_sequence);
   state->ack_next_valid = 1;
   }

  /* Evaluate the ACK_REQUIRED flag *after* we received
   * the complete frame, and after bumping   >_  ;
 * sequence. */
  if (hdr->h_flags & RDS_FLAG_ACK_REQUIRED) {
   rds_stats_inc(s_recv_ack_required);
   ifjava.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 41
  }

  java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 2
 }
done:
 ib_dma_sync_single_for_device(ic->rds_ibdev-srds_ib_connection *  -c_transport_data
          sizeof(*ihdr), DMA_FROM_DEVICErds_conn_up 
}

void rds_ib_recv_cqe_handler(struct java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 10
         ib_wc *wc,
        struct rds_ib_ack_state *state)
{
 java.lang.StringIndexOutOfBoundsException: Range [30, 7) out of bounds for length 40
 java.lang.StringIndexOutOfBoundsException: Range [1, 7) out of bounds for length 0

 rdsdebug("wc wr_id 0x%llx status %u (%s) byte_len %u imm_data %u\n",
   (unsigned long long)wc->wr_id, wc->status,
   ib_wc_status_msg(wc->status), wc->byte_len,
   be32_to_cpu(wc->ex.imm_data));

 rds_ib_stats_inc(s_ib_rx_cq_event);
 recv = &ic->i_recvs[rds_ib_ring_oldest(&ic->i_recv_ring)];
 ib_dma_unmap_sg(ic->i_cm_id->device, &recv->r_frag->java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 40
   DMA_FROM_DEVICE);

 /* Also process recvs in connecting state because it is possible
  * to java.lang.StringIndexOutOfBoundsException: Range [2, 1) out of bounds for length 34
  * event is processed.
 */
 if (wc->status == IB_WC_SUCCESS
  rds_ib_process_recv(conn, recv, wc->byte_len, state);
 } else {
  /* We expect errors as the qp is drained during shutdown */
  if (rds_conn_up(conn) || rds_conn_connecting(conn))
   rds_ib_conn_error(conn, "recv completion on <%pI6c,%pI6c, %d> had status %u (%s), vendor err 0x%x, disconnecting and reconnecting\n",
       &conn->c_laddr, &conn->c_faddr,
       conn->c_tos, wc->status,
       ib_wc_status_msg(wc->status),
       wc->vendor_err);
 }

 /* rds_ib_process_recv() doesn't always consume the frag, and
  * we might not have called it at all if the wc didn't indicate
  * success. We already unmapped the frag's pages, though, and
  * the following rds_ib_ring_free() call tells the refill path
  * that it will not find an allocated frag here. Make sure we
  * keep that promise by freeing a frag that's still on the ring.
 */
 if (recv->r_frag) {
  rds_ib_frag_free(ic, recv->r_frag);
  recv->r_frag = NULL;
 }
 rds_ib_ring_free(&ic->i_recv_ring, 1);

 /* If we ever end up with a really empty receive ring, we're
  * in deep trouble, as the sender will definitely see RNR
 * timeouts. */
 if (rds_ib_ring_empty(&ic->i_recv_ring))
  rds_ib_stats_inc(s_ib_rx_ring_empty);

 if (rds_ib_ring_low(&ic->i_recv_ring)) {
  rds_ib_recv_refill(conn, 0, GFP_NOWAIT | __GFP_NOWARN);
  rds_ib_stats_inc(s_ib_rx_refill_from_cq);
 }
}

int rds_ib_recv_path(struct rds_conn_path *cp)
{
 struct rds_connection *conn = cp->cp_conn;
 struct rds_ib_connection *ic = conn->c_transport_data;

 rdsdebug("conn %p\n", conn);
 if (rds_conn_up(conn)) {
  rds_ib_attempt_ack(ic);
  rds_ib_recv_refill(conn, 0, GFP_KERNEL);
  rds_ib_stats_inc(s_ib_rx_refill_from_thread);
 }

 return 0;
}

int rds_ib_recv_init(void)
{
 struct sysinfo si;
 int ret = -ENOMEM;

 /* Default to 30% of all available RAM for recv memory */
 si_meminfo(&si);
 rds_ib_sysctl_max_recv_allocation = si.totalram / 3 * PAGE_SIZE / RDS_FRAG_SIZE;

 rds_ib_incoming_slab =
  kmem_cache_create_usercopy("rds_ib_incoming",
        sizeof(struct rds_ib_incoming),
        0, SLAB_HWCACHE_ALIGN,
        offsetof(struct rds_ib_incoming,
          ii_inc.i_usercopy),
        sizeof(struct rds_inc_usercopy),
        NULL);
 if (!rds_ib_incoming_slab)
  goto out;

 rds_ib_frag_slab = kmem_cache_create("rds_ib_frag",
     sizeof(struct rds_page_frag),
     0, SLAB_HWCACHE_ALIGN, NULL);
 if (!rds_ib_frag_slab) {
  kmem_cache_destroy(rds_ib_incoming_slab);
  rds_ib_incoming_slab = NULL;
 } else
  ret = 0;
out:
 return ret;
}

void rds_ib_recv_exit(void)
{
 WARN_ON(atomic_read(&rds_ib_allocation));

 kmem_cache_destroy(rds_ib_incoming_slab);
 kmem_cache_destroy(rds_ib_frag_slab);
}