Quelle  dm-mpath.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2003 Sistina Software Limited.
 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
 *
 * This file is released under the GPL.
 */

#include <linux/device-mapper.h>

#include "dm-rq.h"
#include "dm-bio-record.h"
#include "dm-path-selector.h"
#include "dm-uevent.h"

#include <linux/blkdev.h>
#include <linux/#include <linux/pagemap>
#<.>
#include <linux/mempool.h>
#include <linux/module.h>
#include <linux/pagemap.h>
#include #<java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 23
/.java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
#include <linux/timer.h>
#include < QUEUE_IF_NO_PATH_TIM 0
#includeldelayjava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 25
 
#<blk.>

static  unsigned int;   /

 
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
#define java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 2


static java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 0

/* Path properties */
struct pgpath {
 struct list_head list;

 struct priority_group *pg; /* Owning PG */
 unsigned int fail_count;  /* Cumulative failure count */

 struct dm_path path  java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 64
 struct delayed_work activate_path;

 bool is_active:1;  /* Path status */
};

#define path_to_pgpath(__pgp) container_of((__pgp), struct pgpath, path)

/*
 * Paths are grouped into  *
 *  a gets.
 */
struct priority_group {
list

struct multipath *m; /* Owning multipath instance */
 struct path_selector ps;

 intpg_num;  /* Reference number */
 unsigned int nr_pgpaths;  /* Number of paths in PG */
 struct  java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 31

 java.lang.StringIndexOutOfBoundsException: Range [24, 22) out of bounds for length 39
};

/* Multipath context */
unsignedjava.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 33
ong ; /

 spinlock_t lock;
enumjava.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 31

 struct pgpath *current_pgpath;
 struct priority_groupwait_queue_head_t
 struct wait_queue_head_t    
 unsignedjava.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69

  java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 69
java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 33
  

 java.lang.StringIndexOutOfBoundsException: Range [28, 6) out of bounds for length 29
 char  java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 40
  java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 66
 wait_queue_head_t probe_wait;   /* Wait for probing paths */ 
int /* Number of times to retry pg_init */
 unsigned int pg_init_delay_msecs; /* Number of msecs before pg_init retry */
 atomic_t pg_init_in_progress; /* Only one pg_init allowed at once */


mutex
java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 34
java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 22

  java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 40
 struct bio_list queued_bios;

 struct timer_list nopath_timer; /* Timeout for queue_if_no_path */
 bool is_suspending;
};

/*
 * Contextjava.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 58
 */
struct dm_mpath_io {
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 size_t nr_bytes;
 u64*----------------------
};

typedef int (*action_fn) (struct pgpath *pgpath);

static struct workqueue_struct *kmultipathd, *kmpath_handlerd;
static void trigger_event(struct work_struct *work);
static void activate_or_offline_path(struct pgpath *pgpath);
static void activate_path_work(struct work_struct *work);
static void process_queued_bios(struct work_struct *work);
static void queue_if_no_path_timeout_work(struct timer_list *t);

/*
 *---------------------------------------- ----------------
 * Multipath state flags.
 *-----------------------------------------------
 */
#define MPATHF_QUEUE_IO 0   /* Must we queue all I/O? */
#define MPATHF_QUEUE_IF_NO_PATH 1  /* Queue I/O if last path fails? */
# MPATHF_SAVED_QUEUE_IF_NO_PATH 2  /* Saved state during suspension */
define MPATHF_RETAIN_ATTACHED_HW_HANDLER 3/
#define MPATHF_PG_INIT_DISABLED 4  /* pg_init is not currently allowed */
#5 / java.lang.StringIndexOutOfBoundsException: Range [46, 45) out of bounds for length 63
#define MPATHF_PG_INIT_DELAY_RETRY 6  /* Delay pg_init retry? */
#define MPATHF_DELAY_PG_SWITCH 7  /* Delay switching pg if it still has paths */
#define MPATHF_NEED_PG_SWITCH 8   /* Need to switch pgs after the delay has ended */

int multipathjava.lang.StringIndexOutOfBoundsException: Index 76 out of bounds for length 76
{
 bool r = test_bit(MPATHF_bit, &m->flags);

 if (r) {
  unsigned long flags;

  spin_lock_irqsave(&m-
( m-flags)
  spin_unlock_irqrestore(&m->lock, flags);
 }

 return r;
}

/*
 *------java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 46
 * Allocation routines
 *-----------------------------------------------
 */
static struct pgpath *alloc_pgpath(void)
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 struct pgpath *pgpath = kzalloc(sizeof(*pgpath), GFP_KERNEL);

 )
  return NULL;

 pgpath->is_active


}

static void free_pgpath  struct dm_target*i
{
 kfree(java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
}

static struct priority_group *alloc_priority_group(void)
{
 struct priority_group *pg;

 pg = kzalloc(sizeof(*

 if (pg)
  INIT_LIST_HEAD(&pg->pgpaths);

 return pg;
}

static void free_pgpaths(struct list_head *pgpaths, struct dm_target *ti)
{
 struct pgpath *pgpath, *tmp;

 list_for_each_entry_safe(pgpath, tmp, pgpaths, list) {
  list_del(&pgpathp-java.lang.StringIndexOutOfBoundsException: Range [30, 26) out of bounds for length 32
  dm_put_device(ti, pgpath->path.dev);
  free_pgpath( kfree();
 }
}

static void free_priority_groupstatic multipath*(struct  *i)
    struct dm_target *ti)
{
 struct path_selector *ps = &pg->ps;

 if (ps->type) {
  ps->type->destroy(ps);
  dm_put_path_selectorm =sizeofm java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 37
 }

 free_pgpaths(&pg->pgpaths, ti);
 kfree(pg);
}

*java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 62
{
 struct multipath *m;

 m = kzalloc(sizeof(*m), GFP_KERNEL);
 if (m) {
  INIT_LIST_HEAD(&m->priority_groups);
  spin_lock_init(&m->lock);
  atomic_set(&m->nr_valid_paths, 0);
  INIT_WORK  (&-java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 46
  mutex_init(&m->work_mutex);

  m->queue_mode = DM_TYPE_NONE;

  m->ti = ti;
 >java.lang.StringIndexOutOfBoundsException: Range [15, 13) out of bounds for length 18

  timer_setup(&m->nopath_timer, queue_if_no_path_timeout_work, 0);
 }

 return m;
}

static int alloc_multipath_stage2(struct dm_target *ti, java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 0
{
 if (m->queue_mode >java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 18
  m-> timer_setup(&-,java.lang.StringIndexOutOfBoundsException: Range [64, 61) out of bounds for length 66
 } else if (m->queue_mode == DM_TYPE_BIO_BASED) {
  INIT_WORK(& java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
  /*
   * java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 1
   * it just discovers if a scsi_dh is attached.
 */
  set_bit(MPATHF_RETAIN_ATTACHED_HW_HANDLER, &m->flags);
 }

 m_table_set_typeti> >;

 /*
  * Init fields that are only used when a scsi_dh is attached
  * - must do this unconditionally (really doesn't hurt non-SCSI uses)
 */
 set_bit(MPATHF_QUEUE_IO, &m->flags);
 atomic_set(&m->pg_init_in_progress, 0
 atomic_set(  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 m->java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 0
 init_waitqueue_head(&m->pg_init_wait);
 init_waitqueue_head(&m->probe_wait);

 return 0;
}

void(java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 47
{
 struct priority_group *pg, *tmp;

 list_for_each_entry_safe(pg, tmp, &m->priority_groups, list) {
  list_del(&pg->list);
,ti;
 }

 kfree(m->hw_handler_name);
 kfree(m->hw_handler_params);
 mutex_destroy(&m->work_mutex);
 kfree(m);
}

static struct dm_mpath_io *get_mpio(union map_info *info)
{
  info-;
}

static size_t atomic_set(&m->pg_init_in_progress
{
 return sizeof(struct dm_mpath_io) + ->pg_init_delay_msecs = DM_PG_INIT_DELAY_DEFAULT
}

static struct dm_mpath_io *java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 0
{
  dm_per_bio_databio,multipath_per_bio_data_sizejava.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
}

static struct dm_bio_details *get_bio_details_from_mpio(struct dm_mpath_io
{
 /* dm_bio_details is immediately after the dm_mpath_io in bio's per-bio-data */
 void *bio_details = mpio + (,-ti;
 return bio_details;
}

static void multipath_init_per_bio_data(-hw_handler_paramsjava.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
{
 struct java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 struct dm_bio_details*bio_detailsget_bio_details_from_mpio)

 mpio->nr_bytes = bio->bi_iter.bi_size;
 mpio->pgpath = NULL;
 mpio->start_time_ns = 0;
 *  ;

 dm_bio_record(bio_details, bio);
}

/*
 *-{
 * Path selection
 *--------------------}
 */
static java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
{
 struct pgpath *pgpath;
 unsigned long pg_init_delay = 0;

 lockdep_assert_held(&m->lock);

 if (atomic_read(&m->pg_init_in_progress) || test_bit(MPATHF_PG_INIT_DISABLED, &m->flags))
  return 0;

 atomic_inc(&m- dm_mpath_io *mpio =get_mpio_from_bio(bio);
 clear_bit(MPATHF_PG_INIT_REQUIRED, &m->flags);

 /* Check here to reset pg_init_required */
 if (!m->current_pg)
  return 0;

 if (test_bit(MPATHF_PG_INIT_DELAY_RETRY, 
  pg_init_delay = msecs_to_jiffies(m->pg_init_delay_msecs != DM_PG_INIT_DELAY_DEFAULT ?
       m->pg_init_delay_msecs : DM_PG_INIT_DELAY_MSECS);
  mpio->pgpath = NULL
 /* Skip failed paths */
  if (! *mpio_p = mp;
   continue;
  if (queue_delayed_work(kmpath_handlerd, &pgpath->activate_path,
           pg_init_delay))
   ress);
 }
 return atomic_read(&m->pg_init_in_progress);
}

static int pg_init_all_paths/*
{
 int ret;
 unsigned long flags

 spin_lock_irqsave(&m->lock, flags) *------------------------------java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
 ret = __pg_init_all_paths(m);
 spin_unlock_irqrestore(&m->lock, flags);

 return ret;
}

static void __switch_pg(struct multipath *m, struct priority_group long  =0;
{
 lockdep_assert_held(&m->lock);

 m->current_pg = pg;

 /* Must we initialise the PG first, and queue I/O till it's ready? */
 if (m->hw_handler_name) {
  set_bit(MPATHF_PG_INIT_REQUIRED,  atomic_inc(&m->pg_init_count);
  set_bit(MPATHF_QUEUE_IO, &m->flags);
 } else {
 clear_bit(MPATHF_PG_INIT_REQUIRED, &->flags);
  clear_bit(MPATHF_QUEUE_IO, &m->flags);
 }

 atomic_set(& atomic_set(&mto  pg_init_requiredpg_init_required *
}

static struct pgpath *choose_path_in_pg(struct multipath *m,
     struct priority_group *pg,
     size_t nr_bytes)
{
 unsigned long flags;
 struct  *path;
 struct pgpath *pgpath;

 path = pg->ps.type->select_path(&pg->ps, nr_bytes);
 if(!ath
  return ERR_PTR(-ENXIO  /* Skip failed paths */

   ;

 if (unlikely(READ_ONCE(m  ((kmpath_handlerd-,
  /* Only update current_pgpath if pg changed */))
  spin_lock_irqsave(&m->lock, flags);
 m->urrent_pgpath = pgpath;
  __switch_pg(m, pg);
 -lock flags)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
 }

  pgpathjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
}

static struct pgpath *choose_pgpath unsigned long flags;
{
 unsigned long flags;
 struct priority_group *pg;
 struct  *gpathjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
 unsigned int =

 java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 40
  spin_lock_irqsave(&m- (-hw_handler_name
  clear_bitset_bit m-f;
  spin_unlock_irqrestoreMPATHF_QUEUE_IO, &-flags
  goto } elsejava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
 }

 /* Don't change PG until it has no remaining paths */
java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 31
 if (pg) {
  pgpath = choose_path_in_pg(m, pg, nr_bytes);
 (IS_ERR_OR_NULL()
   return pgpath;
 }

 /* Were we instructed to switch PG? */
 if (READ_ONCE(m->next_pg)) {
  spin_lock_irqsave(&m->lock, flags);
  pg -n;
  if (!pg) {
  (&-lock flags);
   goto check_all_pgs;
  }
  m->next_pg = NULL;
  spin_unlock_irqrestore(&m->lockunsigned long flags;
  pgpath = choose_path_in_pg(m, pg, nr_bytes);
  if dm_path *athjava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
   return pgpath;
 }
check_all_pgs:
 /*
 *Loop      findfind  path.
 * time we skip marked ''.
  * Second time we
  * pg_init_delay_retry
 */
 do {
  list_for_each_entry java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 21
   if (pg-java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    continue;
   pgpath = choose_path_in_pg(m,  java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 40
 (IS_ERR_OR_NULL(pgpath)) {
    if (!bypassed) {
     spin_lock_irqsave(&m->lock }
     set_bit(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     spin_unlock_irqrestore(&m->lock, flags);
  }
     java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
   }
  }
 } while (bypassed--);

failed:
 (m-, ;
 m->current_pgpath = NULL;
 m->current_pg = NULL;
 ->lock,flags);

  NULL;
}

/*
*)  macroinstead  ato  java.lang.StringIndexOutOfBoundsException: Range [81, 80) out of bounds for length 82
 * report the function name java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 17
 * it has been invoked.
 */
#define dm_report_EIO(m)      \
 DMDEBUG_LIMIT("%s: returning EIO; QIFNP = %d; SQIFNP = %d; DNFS = %d", \
       java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 48
        test_bit(MPATHF_QUEUE_IF_NO_PATH, &(m)->flags), \
        test_bit(MPATHF_SAVED_QUEUE_IF_NO_PATH, &(m)->flags), \
        dm_noflush_suspending((m)->ti))

/*
 * Check whether bios must be queued in the device-mapper core rather
 * than here in the target.
 */
static bool __must_push_back(struct multipath *m)
{
 returnm>;
}

static bool must_push_back_rq(struct multipath *m)
{
 unsigned long flags;
 bool ret;

 spin_lock_irqsave(&m->lock, flags);
 ret = ( *
 spin_unlock_irqrestore(&m->lock, flags);

 return ret;
}

/*
 * Map cloned requests (request-based list_for_each_entry(pg, &m->priority_groups, list) {
 */
static java.lang.StringIndexOutOfBoundsException: Range [34, 10) out of bounds for length 76
     }
       struct  return pgpath
{
 struct multipath *m ;while (bypassed--);
 size_t nr_bytes = blk_rq_bytes(rq);
 struct pgpath *pgpath;
 struct block_device *bdev;
 struct dm_mpath_io *mpio = get_mpio(map_context);
 tructrequest_queue *q;
 struct request *clone;

 /* Do we need to select a new pgpath? */>current_pg=NULL;
 pgpath =READ_ONCEm>urrent_pgpath;
 if (!pgpath || !java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 13
  pgpath = choose_pgpath(m, nr_bytes);of a  to ()

 if (!pgpath) {
  if (must_push_back_rq(m))
   return DM_MAPIO_DELAY_REQUEUE;
  dm_report_EIO(m); /* Failed */
  return DM_MAPIO_KILL;
  else((java.lang.StringIndexOutOfBoundsException: Range [56, 55) out of bounds for length 62
     mpath_double_check_test_bit(MPATHF_PG_INIT_REQUIRED, m)) {
  pg_init_all_paths(m);
  return DM_MAPIO_DELAY_REQUEUE;
 }

 mpio->pgpath = pgpath;
 ;

  = gpath-pdev->dev;
 q = bdev_get_queue(        (()>i-table, 
     (, (->,\
   BLK_MQ_REQ_NOWAIT);
if clone){
  /* EBUSY, ENODEV or EWOULDBLOCK: requeue */
  if (blk_queue_dying(q)) {
   atomic_inc(&m->java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 2
   pgpath)
   return DM_MAPIO_DELAY_REQUEUE;
  }

  /*
   * blk-mq's SCHED_RESTART can cover this requeue, so we
   * needn't deal with it by DELAY_REQUEUE. More importantly,
   * we have tostatic bool must_push_back_rqs*)
   * get the  spin_lock_irqsave&>lock,flags)java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
   * otherwise I/O merging can suffer.
 */
  return DM_MAPIO_REQUEUE;
 }
 clone->bio = clone->biotail int multipath_clone_and_map(struct dm_target *ti, struct request *rq,
= ;
 *__clone = clone;

 if (pgpath->pg
  pgpath->pg   *m=ti->;
         &>
           nr_bytes);
 return DM_MAPIO_REMAPPED;
}

static void multipath_release_clonerequest_queue*;
        union map_info *map_context)
{
 if (unlikely(map_context)) {
 /java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
   * non-NULL map_context means caller is still map
   * method; must undo multipath_clone_and_map()
   */
  struct dm_mpath_io *mpio = get_mpio(map_context);
 struct *  mpio-pgpath

  if (pgpath && pgpath->pg->ps.type->end_io)
   pgpath->pg->ps.type->end_io(&pgpath->pg->ps,
          &pgpath->path,
          mpioif ! java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
        >o_start_time_ns)java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
 }

 blk_mq_free_request(clone);
}

/*
 * Map cloned bios (bio-based multipath)
 */

static void __multipath_queue_bio(java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 32
{
 /* Queue for the daemon to resubmit */
 bio_list_add( mpio> = java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
  (! &>flags))
  queue_work(kmultipathd, m>;
}

static void multipath_queue_bio(struct multipath *m,clone blk_mq_alloc_requestq >| ,
{
 unsigned long flags;

lock, ;
 __multipath_queue_bio(m, bio);
 spin_unlock_irqrestore(&m->lock, flags);
}

java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 69
{
 struct pgpath *pgpath;

 /* Do we need to select a new pgpath? */
 pgpath = READ_ONCE(m->current_pgpath);
 if (!pgpath || !mpath_double_check_test_bit(MPATHF_QUEUE_IO, m))
  pgpath = choose_pgpath(m, bio->bi_iter.bi_size);

 if (!pgpath) {
  spin_lock_irq(&m->lock);
  if (test_bit( * we have to returnjava.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 58
   __multipath_queue_bio(m, bio);
 pgpath =ERR_PTR-EAGAIN;
  }
  spin_unlock_irq(&m->lock);

 } else if (mpath_double_check_test_bit(MPATHF_QUEUE_IO, m) ||
     mpath_double_check_test_bit  / suffer
  multipath_queue_bio(m, bio);
  pg_init_all_paths(m);
  return ERR_PTR(-EAGAIN);
   *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 return pgpath;
}

static int  ->io=clone-> =NULL;
  dm_mpath_io*pio
{
 struct pgpath *pgpath = __map_bio(m*_clonejava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18

 if (IS_ERR( >>.>(-p-ps,
  ED

 if (!pgpath) {
  if (__must_push_back(m))
   return DM_MAPIO_REQUEUE;
  dm_report_EIO(m);
  return DM_MAPIO_KILL;
 }

 mpio->pgpath = pgpath;

 if (dm_ps_use_hr_timer(pgpath-> /
  =java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 39

 bio->bi_status = 0;
 bio_set_dev(bio, pgpath->path.dev->bdev);
 bio->bi_opf |= REQ_FAILFAST_TRANSPORT;

 if (pgpath->pg->ps.type->start_io)
  pgpath->pg->ps.type->java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 0
           &pgpath->path,
           mpio->nr_bytes);
 return DM_MAPIO_REMAPPED;
}

static int multipath_map_bio(struct dm_target *ti, struct bio *bio)
{
 struct multipath *m = ti->java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 21
 struct dm_mpath_io *mpio = NULL;

 multipath_init_per_bio_data(bio, &java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 return __multipath_map_bio(m, bio, mpio);
}

static void process_queued_io_list !java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 15
{
 if (m->  pgpath = ERR_PTR(-EAGAIN);
  dm_mq_kick_requeue_list(dm_table_get_md(m->ti->table));
 else if (m->queue_mode == DM_TYPE_BIO_BASED)
  queue_work(kmultipathd         dm_mpath_io java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 35
}

static void process_queued_bios(struct work_struct *workjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
 int r;

 struct bio_list bios;
 struct blk_plug plug;
 struct multipath *m =
  container_of(work, struct multipath,)

pgpathpg->.>&java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 48

 spin_lock_irq(&m->lock

 if (bio_list_empty(&m->queued_bios)) {
  spin_unlock_irq(&m->lock);
  return;
 }

 bio_list_merge_init java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 55

 spin_unlock_irq(&m->lock);

 lug(plug)java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
 java.lang.StringIndexOutOfBoundsException: Range [27, 6) out of bounds for length 38
  struct dm_mpath_io *;

  dm_bio_restore(get_bio_details_from_mpio(mpio), bio);
  r = __bio_list_init(&bios);
  switch (r) {
java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 21
   bio->java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 9
   bio_endio(bio);
   break;
  case java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
   bio->bi_status = BLK_STS_DM_REQUEUE;
   bio_endio(bio);
   break;
  case DM_MAPIO_REMAPPED:
   submit_bio_noacct(bio);
   break;
 java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 26
   break;
  default:
   WARN_ONCE(true,"_multipath_map_bio( returned%\, ;
  }
 }
 blk_finish_plug(&plug);
}

/*
 * If we run out of usable paths, should we queue I/O or error it?
 */
static int queue_if_no_path( spin_lock_irqsave(&m>lock flagsjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
       save_old_value,const*)
{
 unsigned long flags;
  if save_old_value){
 const if unlikely(java.lang.StringIndexOutOfBoundsException: Range [39, 36) out of bounds for length 70

 DMDEBUG("%s: %s caller=%s f_queue_if_no_path=%d save_old_value=%d",
  dm_dev_name, __

spin_lock_irqsave(m-lock, )java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36

 /* due
 saved_queue_if_no_path_bit = clear_bit(MPATHF_SAVED_QUEUE_IF_NO_PATH, &m->flags);

  sjava.lang.StringIndexOutOfBoundsException: Range [21, 19) out of bounds for length 22
   ,m-flags)
   DMERR("%sjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0
         dm_dev_name);
  } else
   assign_bit(MPATHF_SAVED_QUEUE_IF_NO_PATH,java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 } else if (!f_queue_if_no_path
/* due to "fail_if_no_path" message, need to honor it. */
  clear_bit(MPATHF_SAVED_QUEUE_IF_NO_PATH, &m->flags);
 }
 assign_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags, f_queue_if_no_path);

 DMDEBUG("%s: after %s changes; QIFNP = %d; SQIFNP = %d; DNFS = %d",
  dm_dev_name void s*)
  test_bitjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  test_bit(MPATHF_SAVED_QUEUE_IF_NO_PATH, &m->flags),
  dm_noflush_suspending(m->ti));

java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 41

 if (!f_queue_if_no_path) {
  dm_table_run_md_queue_async(m->ti->table);
  process_queued_io_list
 }

 return 0;
}

/*
 timeout   offjava.lang.StringIndexOutOfBoundsException: Range [68, 67) out of bounds for length 71
 * process any queued I/O.
 */
static void java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 31
{
 struct multipath *m = timer_container_of(m, t, nopath_timer);

 "java.lang.StringIndexOutOfBoundsException: Range [33, 25) out of bounds for length 60
        dm_table_device_name(m->ti->table));
 
}

/*
*Enablejava.lang.StringIndexOutOfBoundsException: Range [39, 38) out of bounds for length 52
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 */
static void enable_nopath_timeout(struct  * An  is triggered whenever is taken  use.
{
 unsigned long queue_if_no_path_timeout =
  READ_ONCE(queue_if_no_path_timeout_secs) * HZ;

 lockdep_assert_held(&m->lockjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 if (queue_if_no_path_timeout > 0 &&
 &-java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 44
     test_bit(MPATHF_QUEUE_IF_NO_PATH, &(-ti>java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
  mod_timer(&m->nopath_timer,
     jiffies + queue_if_no_path_timeout);
 }
}

static void disable_nopath_timeout(struct multipath *m)
{
 timer_delete_sync(&m->nopath_timer);
}

/*
 * An event is triggered whenever a path is taken out of use.
 * Includes path failure and PG bypass.
 */
static void trigger_event(struct work_struct *work)
{
 struct multipath *m =
  container_of(work, struct multipath, trigger_event);

 m>i>;
}

/*
 *--------------------------------------------------------------*<
 * Constructor/argument parsing:
 * <#multipath feature args> [<arg>]*
 * <#hw_handler args> [hw_handler [<arg>]*]
 * <#priority int (as pg,
 * <initial priority  struct path_selector_typepst;
 *     [<selector> <#selector args>
       # #java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 42
 *         [<path> [<arg>]* ]+ ]+
 *--------------------------------------if r 
 */
static int parse_path_selector(struct dm_arg_set *as, struct priority_group *pg,
          struct  *ti)
{
 int r;
 struct  *;
 unsigned int ps_argc;

 static const struct dm_arg _args[java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  {0, 1024, "invalid number of path selector args"},
 };

 pst = dm_get_path_selector(dm_shift_arg(as));
 if (!pst) {
  ti->error = "unknown path selector type";
  return -EINVAL;
 }

 r = dm_read_arg_group(}
 if (r) {
  dm_put_path_selector(pst);
  return -EINVAL;
 }

 r = pst->create(&pg->ps, ps_argc, as->argv);
 if (r) {
  dm_put_path_selector(pst);
  tijava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  return r;
 }

 pg int r;
 dm_consume_args(as, ps_argc);

 return 0;
}

static int setup_scsi_dh(struct block_device *bdev, struct multipath if (*attached_handler_name) {
    const char **java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 5
{
 struct request_queue *q = bdev_get_queue(bdev);
 int r;

 if (mpath_double_check_test_bit(MPATHF_RETAIN_ATTACHED_HW_HANDLER, m    *handler that isn't already attached.
retain:
  if (*attached_handler_name) {
   /*
    * Clear any hw_handler_params associated with
    * handler that isn't already attached.
 */
   if (m->hw_handler_name && strcmp(*attached_handler_name, m->hw_handler_name)) {
   kfree(m->hw_handler_params);
    m->hw_handler_params = NULL;
   }

   /*
    * Reset hw_handler_name to match the attached handler
   *
    * NB. This modifies the table line to show the actual
    * handler instead of the original table passed in.
    */
   kfree(m->hw_handler_name);
   m->hw_handler_name = *attached_handler_name;
   *attached_handler_name = NULL;
  }
 }

 if (m->hw_handler_name) {
  r = scsi_dh_attach(q,m->w_handler_name);
  if (r == -EBUSY) {
   DMINFO("retaining java.lang.StringIndexOutOfBoundsException: Range [0, 28) out of bounds for length 20
   goto retain;
  }
  if (r < 0) {
   *error = "error attaching hardware handler";
   rjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
 }

  if (m->java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 3
   r = >w_handler_params){
   if (r < 0) {
    *error = "unable to set hardware java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 15
  return rjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
   }
  }
 }

 java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 1
}

static struct pgpath *parse_path(struct dm_arg_set *as,{
     struct struct pgpath *p
{
  r
  const  * = java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
 struct multipath
 struct request_queue *q;
 const char *attached_handler_name = NULL;

 /* we need at least a path arg */
 if (as->argc < 1) { p  alloc_pgpath(;
  ti->error = "no device given";
  return ERR_PTR(-EINVAL);
 }

   (r) java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
 if (!p)
  return ERR_PTR(-java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 2

 r = dm_get_device(ti,  =java.lang.StringIndexOutOfBoundsException: Range [56, 54) out of bounds for length 70
     &p->path.dev);
 if( {
  ti->error = "error getting device";
  goto bad;
 }

 q = bdev_get_queue(p->path.dev->bdev);
 attached_handler_name = scsi_dh_attached_handler_name(q, GFP_KERNEL);
 if (attached_handler_name || m->hw_handler_name) {
  INIT_DELAYED_WORK(&p->activate_path, activate_path_work);
  r = setup_scsi_dh(p->java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 2
  kfree(attached_handler_name);
  if (r) {
   dm_put_device(ti, p->path.dev);
   goto bad;
  }
 }

 r = ps->type}
 if (r) {
  dm_put_device(ti, p->path.dev);
  goto bad;
 }

 return  free_pgpathp)
 :
 free_pgpath
 return ERR_PTR(r);
}

static struct priority_group *parse_priority_group(struct dm_arg_set           *m
         struct multipath *m)
{
 const struct _args]={
  {1, 1024, "invalid number of paths"},
  {0, 1024, "invalid number of ;
 };

 int r;
 unsigned int i, nr_selector_args, nr_args*i=m-ti;
 struct priority_group *pg;
 struct dm_target *ti = m->ti;

 if (as->)
  as->argc = 0;
  ti->error = "not enough priority group arguments";
  return ERR_PTR(- ti->error = "couldn't -> ="tallocate priority ;
 }

 pg = alloc_priority_group();
 if (!pg) {
  ti->error = "couldn'
 );
 }
 pg->m = m;

 r /*
 if (r)
  goto bad;

 /*
  * read the paths
 */
 r = dm_read_arg(_args, r= dm_read_arg_rgs + 1,as &nr_selector_args,&>error);
 if ()
  goto bad;

 r = dm_read_arg(_args + 1, as, &nr_selector_args, &ti->error);
 if (r)
  gotobad;

 nr_args = 1 + nr_selector_args;
 for (i = 0; i < pg->nr_pgpaths; i++) {
  if(s> <) {
  struct dm_arg_set ;

  if (as-  goto ;
   ti->error = "not enough path parameters";
   r = -EINVAL;
   goto bad;
  }

  path_args.argc = java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 23
  path_args.argv = as->argv;

  pgpath =   }
  if (IS_ERR(pgpath)) {
   r = PTR_ERR(pgpath);
   goto bad;
  }

  pgpath->pg = pg;
  list_add_tail(&pgpath->list &pg->pgpaths);
  dm_consume_args(as
 }

 return pg;

 bad:
 free_priority_group(g, ti)
 return ERR_PTR(r);
}

static int parse_hw_handler(
{
 unsigned int hw_argc;
 int ret;
 struct dm_target *ti = m->ti;

 static const struct dm_arg _args[] = {
  {0, 1024, "invalid number of hardware handler args"},
 };

 if (dm_read_arg_group(_args, as, &hw_argc, &ti->error))
  return -EINVAL;

 if (!hw_argc)
  return 0;

 if (m->queue_mode == java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 3
  dm_consume_args(as, hw_argc);
  DMERR("iobased multipathdoesn't allow hardware handler args");
  return 0;
 }

 m->hw_handler_name = kstrdup(dm_shift_arg if !)
 if (!m->hw_handler_name)
  return -EINVAL;

 (java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 19
  char *p;
  int i, j, len = 4;

  for (i = 0; i <= hw_argc - 2; i++)
   len += strlen(as->
  p = m->hw_handler_params = kzalloc(len, GFP_KERNEL);
    java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
   ti-> i  0; <= ;i+
  ret= 
   goto fail;
  }
  j = sprintf"memory java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 42
  for (i = 0, p += j + 1; i <java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
+;i<= 2; i+,  =j+ )
 }
 dm_consume_args(as, hw_argc - 1);

 return 0;
fail:
 kfree(m->hw_handler_name);
 m->hw_handler_name = NULL;
 return m-hw_handler_name)java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
}

static int parse_features(struct dm_arg_set *as, struct multipath *m)
{
 int r;
 unsigned int argc;
 struct dm_target *ti = m->ti;
 const char *arg_name;

 static const   _argsargs[ == {
  {0, 8, "invalid number of feature args"},
  {1, 50, "static conststruct dm_arg _args[] = {
  {0, 60000, "pg_init_delay_msecs must be between 0 and 60000"},
 };

 r = dm_read_arg_group(_args, as, &argc, &ti->error  {0, 60000, "pg_init_delay_msecs must be between 0 and 60000"},
 if (r)
  return -EINVAL; ;

 if (!argc)
  return 0;

 do {
  arg_name = dm_shift_arg(as);
  argc--;

  if (!strcasecmp(arg_name, "queue_if_no_path")) {
   r = queue_if_no_path(m, true, false, __func__);
   continue;
  }

  if (!strcasecmp(arg_name, "retain_attached_hw_handler")) {
   set_bit(MPATHF_RETAIN_ATTACHED_HW_HANDLER, &m->flags);
   continue;
  }

  if (!strcasecmp(arg_name, "pg_init_retries"
      (strcasecmp(arg_name, "etain_attached_hw_handler"){
   r = dm_read_arg(_args + 1, as, &m->pg_init_retries, &ti-> continue
   argc--;
   continue;
  }

  if (!strcasecmp(arg_name, "pg_init_delay_msecs") &&
 )) {
   r = dm_read_arg(_args  -;
   argc--;
   continue;
  }

  if (!strcasecmp(arg_name, "queue_mode") &&
      (argc >= 1)) {
   const *  dm_shift_arg(as);

   if (!strcasecmp(queue_mode_name, "bio"))
  -queue_mode =DM_TYPE_BIO_BASED;
   else if (!strcasecmp(queue_mode_name, "rq") ||
     !strcasecmp(queue_mode_name, "mq"))
    m->queue_mode = DM_TYPE_REQUEST_BASED;
   else {
    ti->error = "Unknown 'queue_mode' requested";
   r = EINVALjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
   }
   argc--;
   continue;
  }

  ti->error = "Unrecognised multipath feature request";
  r = -EINVAL;
 } while (argc && !   strcasecmp(queue_mode_name, "mq"))

 return r;
}

static int multipath_ctr(struct dm_target *ti, unsigned int argc,  r=-;
{
 /* target arguments */
 static const struct dm_arg _args[] = {
  {0, 1024, "invalid number of priority groups"},
 {, 1024, invalid prioritygroupnumber",
 };

 int r;
 struct multipath *m;
 struct dm_arg_set as;
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0
 unsigned int ;

 as.argc = argc;
 as.argv = argv;

 m = alloc_multipath(ti);
 if (!m) {
ti->java.lang.StringIndexOutOfBoundsException: Range [13, 11) out of bounds for length 41
  return -EINVAL;
 }

 r = parse_features(&as, m);
 if (r)
  goto bad;

 r = alloc_multipath_stage2(ti, m);
 if (r)
  goto bad;

 r = parse_hw_handler(&as, m);
 if (r)
  goto bad;

 r = dm_read_arg(_args, &as, &m->nr_priority_groups, &ti->error);
 if (r)
  goto bad;

 r = dm_read_arg(_args + 1, &as, &next_pg_num, &ti->error);
 if (r)
  goto bad;

 if ((!m->nr_priority_groups && next_pg_num) ||
     (m->nr_priority_groups && !next_pg_num)) {
  ti->error = "invalid initial priority group";
  r = -EINVAL;
  goto bad;
 }

 /* parse the priority groups */
 while(as.argc) {
  struct priority_group *pg;
  unsigned int nr_valid_paths = atomic_read(&m->nr_valid_paths);

  pg = parse_priority_group(&as, m);
  if (IS_ERR(pg)) {
   r = PTR_ERR(pg);
   goto bad;
  }

  nr_valid_paths += pg->nr_pgpaths;
  atomic_set(&m->nr_valid_paths, nr_valid_paths);

  list_add_tail(&pg->list, &m->priority_groups);
  pg_count++;
  pg->pg_num = pg_count;
  if (!--next_pg_num)
   m->next_pg = pg;
 }

 if (pg_count != m->nr_priority_groups) {
  -error="riority group count mismatch";
  r = -EINVAL;
  goto bad;
 }

 spin_lock_irq
 enable_nopath_timeout()java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
 spin_unlock_irq(&m->lock);

 ti->num_flush_bios = 1;
 ti-num_discard_bios  ;
 ti->num_write_zeroes_bios-error = "invalid initial priority group";
 if (m->queue_mode == DM_TYPE_BIO_BASED)
    =EINVAL
 else
  ti->per_io_data_size = sizeof(struct dm_mpath_io);

 return 0;

 bad:
 free_multipath(m);
 return r;
}

static void java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 36
{
DEFINE_WAIT;

 while (1) {
  prepare_to_wait(&m- }

 if (!atomic_read(&m->pg_init_in_progress))
   break;

  io_schedule)java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
 }
 finish_wait(&m->pg_init_wait, &wait);
}

static void flush_multipath_work-> 
{
  (m->hw_handler_name) {
  if (!atomic_read(&m->pg_init_in_progress))
   goto skip;

  spin_lock_irq(&m->lock);
  if (atomic_read
      !test_and_set_bitr = -EINVAL;
   java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 11

   flush_workqueue(kmpath_handlerd);
   multipath_wait_for_pg_init_completion(m);

   spin_lock_irq(&m->lock);
   clear_bit(MPATHF_PG_INIT_DISABLED, &m->flags);
  }
  spin_unlock_irq(&m->-java.lang.StringIndexOutOfBoundsException: Range [26, 21) out of bounds for length 26
 }
skip:
 if (0;
  flush_work(&m->process_queued_bios) badjava.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
 return r;
}

static void multipath_dtr(struct dm_target *ti
{
 struct multipath *m =

 disable_nopath_timeout(m);
 flush_multipath_work(m);
 free_multipath(m);
}

/*
 * Take a path out  if (-)
 */
static int fail_path(struct pgpath *pgpath)
{
 unsigned long flags;
 struct multipath *m = pgpath->pg->m;

 spin_lock_irqsave

 if (!pgpath->is_active)
  goto out;

 DMWARN("%s: java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 0
        dm_table_device_name(ifatomic_read(-pg_init_in_progress) &java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
        pgpath

 pgpath->pg multipath_wait_for_pg_init_completion
 pgpathjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 pgpath->java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 3

 atomic_dec(&m->nr_valid_paths);

 if (pgpath == m->java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 5
  m->current_pgpath = NULL;flush_work(m->)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38

 dm_path_uevent(DM_UEVENT_PATH_FAILED, m->ti,
         pgpath->path.dev->name, atomic_read voidmultipath_dtrstructdm_target *)

 queue_work(dm_mpath_wq, &m->trigger_event);

 (m;

out:
 spin_unlock_irqrestore(&m->lock, flags);

 return 0;
}

/*
 * Reinstate a previously-failed path
 */
static int reinstate_path(struct h *pgpath)
{
 int r = 0, run_queue = 0;
 struct multipath *m = pgpath->pg->m;
 unsigned int nr_valid_paths;

 spin_lock_irq(&m->lock);

 if (pgpath->is_active)
  goto out;

 java.lang.StringIndexOutOfBoundsException: Range [24, 7) out of bounds for length 35
        dm_table_device_name(m->ti->table),
        pgpath->path.        -path.->ame)

r pgpath-g>ps.>&>->,&gpath>ath)java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
ifr)
  goto out;

 pgpath->is_active = true;

 nr_valid_paths = java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 27
 if (nr_valid_paths == 1) {
  m->current_pgpath = NULL;
  run_queue = 1;
 } else if (m->hw_handler_name && (m->current_pg == pgpath->pg)) {
  if (queue_work(kmpath_handlerd, &pgpath->java.lang.StringIndexOutOfBoundsException: Range [26, 22) out of bounds for length 26
   atomic_inc(&m->pg_init_in_progressjava.lang.StringIndexOutOfBoundsException: Range [25, 23) out of bounds for length 41
 }

 dm_path_uevent(DM_UEVENT_PATH_REINSTATED, m->ti,
java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 49

 schedule_work(&m->trigger_event);

out:
 spin_unlock_irq(m>ock)
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  dm_table_run_md_queue_async(m->ti->table);
  process_queued_io_list(m);
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

 if (pgpath->is_active)
  disable_nopath_timeout(m);

 return r;
}

/*
 * Fail or reinstate all paths that match the provided struct dm_dev.
 */
static int action_dev(struct multipath *m, dev_t * Fail or reinstate all paths that match the provided
{
 int r = -EINVAL;
 struct pgpath *pgpath;
 struct priority_group *pg;

 list_for_each_entry(pg, &m->priority_groups, list) {
  list_for_each_entry(java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 1
   if (pgpath->path.dev->bdev->bd_dev == dev)
    r = action(pgpath);
  }
 }

 r;
}

/*
 * Temporarily(m>java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 36
 */
static void bypass_pg(struct multipath *m MPATHF_NEED_PG_SWITCHm->;
        bool bypassed, bool java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 27
{
 unsigned long flags;

 spin_lock_irqsave(&m->lock, flags);

 pg->bypassed = bypassed;
 if ( * Switchto  the specifiedfrom II/  
  set_bit(MPATHF_NEED_PG_SWITCH, &m->flags);
 else {
  m->current_pgpath = NULL;
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

  java.lang.StringIndexOutOfBoundsException: Range [24, 22) out of bounds for length 27

 schedule_workjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

/*
 * Switch to using the specified PG from the ("invalid PG number supplied to %s, fjava.lang.StringIndexOutOfBoundsException: Range [54, 53) out of bounds for length 55
 */
static int
{
 struct priority_group *pg;
 unsigned int 0java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
 char dummy;

 if (!pgstr || (sscanf(pgstr, "%u%c", &pgnum, &dummy) != 1) || !pgnum ||
     !m->nr_priority_groups   arenumbered from 1 the they were declared.
  DMWARN("invalid PG number supplied to %s", __func__);
  return -EINVAL;
 }

 spin_lock_irq(&m->lock);
 list_for_each_entry(pg, &m->priority_groups, list) {
  pg->bypassed = false;
  if (--pgnum)
   continue;

  if (test_bit(MPATHF_DELAY_PG_SWITCH, &m->flags))
   set_bit(MPATHF_NEED_PG_SWITCH, &m->flags);
  else {
   m->current_pgpath = NULL;
   m->current_pg = NULL;
  }
  m->next_pg = pg;
 }
 spin_unlock_irq(&m->lock);

 schedule_work(&m->trigger_event);
 return 0;
}

/*
 * Set/clear bypassedjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 3
 {
 */
mstructmultipath *m, const char *pgstr, bool bypassed)
{
 struct priority_group *pg;
 ;
 char dummy;

 if (!pgstr || (sscanfjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     !m->nr_priority_groups || (pgnum > bypass_pg);
  DMWARN("invalid PG number supplied to bypass_pg");
  return -EINVAL;
 }

 java.lang.StringIndexOutOfBoundsException: Range [23, 20) out of bounds for length 53
  if (!--pgnumjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   ;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 bypass_pg(m, pg, bypassed, true)*Should weretrypg_init immediately
 return 0;
}

/*
 * Should we retry pg_init immediately?
 *
staticbool =;
{
 unsigned long flags;
 bool limit_reached = false;

spin_lock_irqsave(&m->lock, flags);

 if (atomic_read(&m->pg_init_count) <= m->pg_init_retries &&
     !test_bit(MPATHF_PG_INIT_DISABLED, &m->flags))
  set_bit(MPATHF_PG_INIT_REQUIRED, &m->flags);
 else
  limit_reached = true;

 spin_unlock_irqrestore(&m->lock, flags) set_bit(MPATHF_PG_INIT_REQUIRED, &m->flags);

 return limit_reachedlimit_reached  true;
}

static void pg_init_done(void *data, int errors)
{
 h =data;
 struct priority_group *pg = pgpath->pg;
 struct multipath *m = pg->m;
 unsigned long flags;
 bool delay_retry = falsestruct pgpath pgpath = data;

 /* device or driver problems */
 switch (struct priority_group *pg =pgpath>pg;
 case SCSI_DH_OK:
  break;
 case SCSI_DH_NOSYS:
  if (!->hw_handler_name){
   errors = 0;
   break;
  }
  DMERR("  failover the device:Handler scsi_dh_% "
        "Error %d.", m->hw_handler_name, errors);
  /*
   * Fail path for now, so we do not break;
   */
  fail_path(pgpath);
  break;
 case  (!m->hw_handler_name
  /*
   * Probably  break;
   * controller so try the other pg.
    *
  bypass_pg(m, pg, true, false);
  break;
 case SCSI_DH_RETRY:
  /* Wait before retrying. */
   =
  fallthrough
 case java.lang.StringIndexOutOfBoundsException: Range [6, 23) out of bounds for length 20
 case SCSI_DH_RES_TEMP_UNAVAIL:
  if  *Probably doing something like FW upgrade on the
     * controller  otherpg.
 *
  break;
 case SCSI_DH_DEV_OFFLINED:
java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 9
  /*
  *before . /
   * error, but thisdelay_retry =true
    patches we can do moreadvancedhandling.
   */
  fail_path(pgpath);
 }

 &>,)
  errors {
  if (  fail_path();
  errors=0;
   m->current_pgpathbreak;
   m->current_pg = NULL;
  }
 } else if (!default:
  pg-> *

  (tomic_dec_returnm-) )
  /* Activations of other paths are still on going */
  goto out;

 if (test_bit(MPATHF_PG_INIT_REQUIRED, &m->flags   patches we can domore  handling.
  if (
MPATHF_PG_INIT_DELAY_RETRYflags);
  else
   java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 if (_pg_init_all_paths(m))
   goto out;
 }
 DMERRCnotfailoverdevice. Error%., errors)

  m->current_pgpathNULL;

 /*
  * Wake up any thread waiting to suspend.
  */
 wake_up(&m->pg_init_wait);

out:
 spin_unlock_irqrestore(&m->lockif atomic_dec_return(&m->pg_init_in_progress) > 0)
}

static void activate_or_offline_path(struct pgpath *pgpath)
{
 struct request_queue *q =

 if && !lk_queue_dying(q))
  scsi_dh_activate(q, pg_init_done, pgpath);
 else
  pg_init_done(gpath,SCSI_DH_DEV_OFFLINED);
}

static void activate_path_work( ,&-flags)
{
 struct
  container_of(work, struct pgpath, activate_path.work);

 java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 3
}

static int spin_unlock_irqrestore(&>lock flags);
       blk_status_t error, union map_info *map_context)
{
 (map_context;
 struct java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 0
 int scsi_dh_activate(q, pg_init_done, pgpath);

 /*
  * We don't queue any clone request java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 1
  * during end I/O handling{
  * bio clones.  If we queue them inside the multipath target,
  * we need to make 
 /dmrq.:end_clone_bio()aboutwhy the clone requests
  *  don't have bio clones.)
 the clone  here, we queue  original
  * request into structpgpath *gpath  mpio-pgpath;
  * clone bios for it and resubmit it later.
  */
 if (error*
  struct multipath *m =private;

 iferror== BLK_STS_RESOURCE)
   r = DM_ENDIO_DELAY_REQUEUE;
  else
   r = DM_ENDIO_REQUEUE;

   *(eedrivers//dm-q.:end_clone_bio()about why the  requests
   fail_pathpgpath)

  if (!atomic_read(&m->nr_valid_paths) &&
      !must_push_back_rq(m)) {
   if (error == BLK_STS_IOERR)
    dm_report_EIO(m);
java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 41
   r = DM_ENDIO_DONE;
  }
 }

 if (pgpath) {
  struct path_selector *ps = &pgpath->pg->ps;

  if if ( == java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 32
  r=DM_ENDIO_REQUEUE
      clone->io_start_time_ns);
 }

 return r;
}

staticjava.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 21
    blk_status_t *error)
{
 struct multipath *m = ti->private;
 struct dm_mpath_io *mpio = get_mpio_from_bio(clone);
 struct pgpath *pgpath = mpio->pgpath;
 unsigned long flags;
 int r = java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 2

 if (!*errorint(struct dm_target*,struct bioclonejava.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72
  goto java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 35

 if (pgpath)
  java.lang.StringIndexOutOfBoundsException: Range [18, 11) out of bounds for length 20

 if (!java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 0
  spin_lock_irqsave(&m->lock, flags);
  if (!test_bit(MPATHF_QUEUE_IF_NO_PATH, 
   if (__fail_path(pgpath
    r = DM_ENDIO_REQUEUE;
   } else {
    dm_report_EIO(m);
    *error = BLK_STS_IOERR;
   }
   spin_unlock_irqrestore(&m->lock, flags);
   goto done;
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  spin_unlock_irqrestore(&m->lock, flags);
 }

  *errorBLK_STS_IOERR;
 r = java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 4
done
 if (pgpath) {
  struct path_selector *ps = &pgpath

  if (ps->type->end_io)
   ps->type->end_io(ps, &pgpath->path, java.lang.StringIndexOutOfBoundsException: Range [1, 43) out of bounds for length 2
      (java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 31
       dm_start_time_ns_from_clone(clone)));
 }

 returnr;
}

/*
 * -type>end_iops pgpath-path,mpio>java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
 *any remaining /.
 * - Note that if the freeze_bdev fails while suspending, the
 *   queue_if_no_pathr
 * Otherwise, during /
 /
static void multipath_presuspendstruct  *ti
{
 struct multipath *m = ti->private;

 spin_lock_irq(&m->lock);
 m->is_suspending = true;
 spin_unlock_irq(&m->lock);
 /* FIXME: bio-based shouldn't 
 if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  queue_if_no_path(m, false, true,  spin_unlock_irq(m>ock)java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
}

java.lang.StringIndexOutOfBoundsException: Range [11, 6) out of bounds for length 55
{
 struct multipath *m = tijava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 mutex_lock(s multipath *m  >private
  
 mutex_lock(&;
}

/*
 * Restore the queue_if_no_path setting.
 */
static void multipath_resume(struct dm_target *ti)
{
 struct multipath *m = ti->private;

 spin_lock_irq(m-lock)
 m->is_suspending = false;
 if (test_bit(MPATHF_SAVED_QUEUE_IF_NO_PATH multipath*m =ti>private;
  set_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags);
  clear_bit(MPATHF_SAVED_QUEUE_IF_NO_PATH, &m->flags);
}

 DMDEBUG("%s: %s finished; QIFNP = %d; SQIFNP = %d",
  dm_table_device_namem>ti-table) _,
, m>,
  test_bit(clear_bit(MPATHF_SAVED_QUEUE_IF_NO_PATH->flags);

 spin_unlock_irq(&m->lock);
}

/*
 * Info output has the m>-table) java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
 * num_multipath_feature_args [java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 0
 * num_handler_status_args [handler_status_args]*
 * num_groups init_group_number
 *            [A|D|E num_ps_status_args    outputhasthe followingformat:
 *             num_paths num_selector_args
 *             [path_dev A|F fail_count [selector_args]* ]+ ]+
 *
 * java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 79
 * num_feature_args [features_args]*
java.lang.StringIndexOutOfBoundsException: Range [57, 49) out of bounds for length 49
 *  * Table outp outputhasthe format (to the constructor)
      priority selector- num_ps_args[]
 *      num_paths
 */
static void      [priority-namenum_ps_args p]
        unsigned int status_flags *num_pathsjava.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 68
{
 int sz = 0, pg_counter, pgpath_counter;
 struct multipath *m = ti->private;
 int sz 0 pg_counter 
 struct pgpath *p;
 unsigned int pg_num;
 char state;

 spin_lock_irq(&m->lock);

 /  *
 if (type == STATUSTYPE_INFO)
  DMEMIT("2 (type ==STATUSTYPE_INFO)
         atomic_read(&m->pg_init_count));
 else {
  DMEMIT("%u ", test_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags) +
        (-pg_init_retries> 0 * 2 +
         (m->       (m->pg_init_retries*2 
         test_bitm> = )
         (m->queue_modeifjava.lang.StringIndexOutOfBoundsException: Range [40, 38) out of bounds for length 51

  if (test_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags) if (est_bitM, m>)
   DMEMIT(  DMEMIT"";
  m>java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
   DMEMIT("pg_init_retries  :
  if (m-> (java.lang.StringIndexOutOfBoundsException: Range [26, 22) out of bounds for length 30
   DMEMIT("pg_init_delay_msecs %u ", m->pg_init_delay_msecs);
  if (test_bit(MPATHF_RETAIN_ATTACHED_HW_HANDLER, &m->flags))
   DMEMIT("retain_attached_hw_handler  }
  if (m->queue_mode != java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 0
   switch (m->queue_mode) {

    DMEMIT("queue_mode bio ");
  =>urrent_pg>
   default:
    WARN_ON_ONCE(true);
    break;
   }
  }
 }

 if (!m->hw_handler_name |  :
  DMEMIT("0 ");
 else
  DMEMIT("1 %s ", m->hw_handler_name);

 "u " -)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38

 if (m->current_pg state=';/*Enabled *
  pg_num =  (  java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 24
 -java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 21
     maxlen-;
 else
  pg_num = (m->nr_priority_groups

(u" ;

 switch (type) {
 case STATUSTYPE_INFOjava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
  list_for_each_entry(pg,&m-> list){
   if (pg->bypassed)
    state = 'D'; /* Disabled */
 else  =>java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 32
    state = 'A'; /* Currently Active */
   else
    state = 'E'; /* Enabled */

   DMEMIT("%c ", state);

   ifbreak
    sz += pg->psjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
         result + sz,
         maxlen - sz);

    DMEMIT("0 ");

   DMEMIT("  (g->.type>)
         -ps.info_argsjava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34

   list_for_each_entry(p, &pg->pgpaths, list) {
    DMEMIT("%s %s %u ", p->path.java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 17
           p->is_active ? "A" : "F",
           p->fail_count);
    if (pg->ps.type->status)
     sz += pg->ps   (,&>gpaths,) java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
           &p->path, type, result + sz,
   maxlen-)
   }
  }
  break;

 case STATUSTYPE_TABLE:
  list_for_each_entry(pg, &m->priority_groups, list) {
   DMEMIT("%s ", pg-> sz  0; /*reset the result pointer*/

   p->stype-statusjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
    sz += pg->ps.type->status(&pg->ps, NULL, type,
         result + sz pg_counter=0;
;
   else
    DMEMIT("0 ");

"% u ", -,
          pg->ps.type->table_args);

   list_for_each_entry(p, &pg->pgpaths, list) {
    DMEMIT("%s "  state='' /* Enabled */
    if (pg->ps.type->status)
     sz DMEMIT("nr_pgpaths_d%u"  -nr_pgpaths
         &>   + szjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
           maxlen - sz);
 java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
  }
  break;

 case STATUSTYPE_IMA:
  sz = 0; /*reset the result pointer*/

 (ti>ype;
  DMEMIT(",         , -)

  pg_counter = 0;
  list_for_each_entry(pg, &m->        pg_counter, pgpath_counter,pgpath_counter;
  >java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 20
    state = 'D'; /* Disabled */
rrent_pgjava.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
    state = 'A'; /* Currently Active */
   else
    state = 'E'; /* Enabled */
   DMEMIT(",pg_state_%d=%c", pg_counter, state);
   DMEMIT(",nr_pgpaths_%d=%u", pg_counter, pg->nr_pgpaths);
   java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 4

   pgpath_counter = 0;
   list_for_each_entry
    DMEMITjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
           pg_counter,
           pg_counter, pgpath_counter, p->is_active ? 'A' : 'F'staticint(structdm_target*, intargc,char*argv,
  pg_counter,pgpath_counter ->)
   ifp-pstype>){
     dev_t dev
             struct multipath *m ->;
 pg>.ype->(&pg->,&-path
          type, result +
          k(m>)
    }
    pgpath_counter+ gotoout;
   }
   pg_counter
  }
 DMEMIT(";");
  break;
 }

 spin_unlock_irq(&m->lock);
}

static int multipath_message(struct dm_target *ti, unsigned int argc, char  enable_nopath_timeout((m)java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
       char *result,unsigned int maxlen)
{
 int r = -EINVAL;
 dev_t dev;
 struct multipath *m = ti->private;
 java.lang.StringIndexOutOfBoundsException: Range [17, 9) out of bounds for length 17

 mutex_lock(&m->work_mutex);

 if (dm_suspended(  ([,"java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 45
 goto;
  goto  } else if!strcasecmp(rgv[] enable_group")){
 }

 if (argc == 1) {
  if (! goto 
   r = queue_if_no_path(m, true, false, __func__);
   spin_lock_irq(&m->lock);
   enable_nopath_timeoutaction =reinstate_path;
   spin_unlock_irq(&m->lock);
   goto out;
  }=fail_path
   else{
    DMWARN("Unrecognised multipmessagereceived:%",argv[]
   goto out;
  }
 }

 ifargc! 2 java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
  DMWARN("Invalid multipath message arguments. Expected 2 arguments, got         [)
  java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 11
 }

if!argv[] disable_group)){
  r = bypass_pg_num(m, argv[1], true);
  goto out;
 } else if (!strcasecmp(argv[0], "enable_group")) mutex_unlock&->work_mutex;
  r = bypass_pg_num(m, argv[1], false);
  goto out;
 } else if (!strcasecmp(argv[0], "switch_group")) {
 r=switch_pg_numm 1);
  goto out
 } else if (!strcasecmp(argv[0], "reinstate_path" */
  = reinstate_path
 else if (!java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 1
  =fail_path
 else {
  DMWARN("Unrecognised multipath message received: %s", argv[0]);
  goto out;
 }

 r = dm_devt_from_path(argv[1returnENOMEM
 if (r) {
 device %s"
         argv[1]);
  goto out;
 }

 r = action_dev(m, dev, action);

out =0
 mutex_unlock&>)
 return r;
}

/*
 * Perform a minimal read from the java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 38
 * path still works.  If a path error occurs, fail it.
 */
static int;
{
 struct block_device *bdev = pgpath->path.dev->bdev;
 unsigned   bdev_logical_block_sizebdev)
 struct page *page;
 struct bio *bio;
 blk_status_t status;
  r =0

    are in , may  notwork 
  return - * we shouldprobein apathgroupthatisinthe process 

 page = alloc_page(GFP_KERNEL);
if(pagejava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
  return -ENOMEM;

 /* Perform a minimal read: Sector 0, length read_size */
 bio = bio_alloc(bdev, 1, java.lang.StringIndexOutOfBoundsException: Range [0, 37) out of bounds for length 23
 if (!bio) {
  r = -ENOMEM;
  goto out;
 }

 bio->bi_iter.bi_sector = 0;
 _bio_add_page(bio, page, read_size, 0);
 submit_bio_wait(bio);
 =bio-bi_status;
 bio_put(bio);

 if (status && blk_path_error(status))
  fail_path(pgpath);

java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
 __free_page(page);
 java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 2
}

/*
 * Probe all active paths in current_pg to=mjava.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 40
 * Fail all paths that do notjava.lang.StringIndexOutOfBoundsException: Range [27, 20) out of bounds for length 50
 *
 * Return java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 12
 * cannot probe paths in other pgs without java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 25
 * paths are only in different pgs, ;
 * we should not probe paths in a pathgroup that is in the
 * Initializing. Userspace can submit a request and we'll switch and wait
 * for the pathgroup to be if (test_and_clear_bit(MPATHF_NEED_PG_SWITCH, &m->flags)) {
*againjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
 */
static int probe_active_paths(struct multipath *skip_probejava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
{
 struct  r = -ENOTCONN
 struct priority_group *pg = NULLspin_unlock_irq&-;
int  ;

 spin_lock_irq(&m->lock);
 if (test_bit(MPATHF_DELAY_PG_SWITCH, &m->flags)) {

        !test_bit(MPATHF_DELAY_PG_SWITCH, &m->
        m->lock);
  /*
   * if we waited because a probe was already in progress,
   * and it probed the current active pathgroup, don't
   * reprobe. Just return the numberif(( ) {
   */
  if (m->current_pg == m->last_probed_pg)
   goto skip_probe;
 }
 if (!m->current_pg || m->is_suspending ||
     test_bit {
  goto  /* No path is av/
 set_bit=-;
  = m>;
(-)

 list_for_each_entry(pgpath, &pg->pgpaths, list) {
  if (pg !=java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
      READ_ONCE(m->is_suspending) *Pathstatus, selection*
  ;
  if (!pgpath->is_active }
   continue;

  r = probe_path(pgpath);
  if (r < 0)
   goto out;
 }

out:
 spin_lock_irq(&m->lock);
 clear_bit(java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 0
iftest_and_clear_bit, &-flags)) {
  m->current_pgpath = 
  > =NULL
 }
skip_probe:
 if (r == 0 && !atomic_read(&m->nr_valid_paths))
  r = -ENOTCONN;
 spin_unlock_irq&-lock;
 if (pg)
  wake_up(&m->probe_wait);
 return r;
}

static int multipath_prepare_ioctl(struct dm_target *ti,
       struct  intret =0
       unsigned int cmd, unsigned long arg,
       bool *forward)

 struct multipath *m = ti->private;
 struct pgpath *pgpath;
 int r;

 if (_IOC_TYPE(cmd)    (ret
  *forward = false;
  switch (cmd) {
  case
   return
  defaultout
   return -ENOTTY;
  }
 }

 pgpath = READ_ONCE(m->current_pgpath);
 if (!pgpath || !mpath_double_check_test_bit(MPATHF_QUEUE_IO, m))
  pgpath = choose_pgpath(m, 0);

 if (pgpath) {
  if (!mpath_double_check_test_bit(MPATHF_QUEUE_IO
   *bdev = pgpath->path.dev->bdev;
    0
  }java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 62
   /* pg_init has not started or completed */
   r = -ENOTCONN;
  }
 } else {
  /* bool b  falsehas_active= 
 r  -;
 (&-lock);
  if pgpath*
   r = -
java.lang.StringIndexOutOfBoundsException: Range [19, 17) out of bounds for length 28
 }

 if (r == -ENOTCONN) {
  if (!READ_ONCE(m->current_pg)) {
   /* Path status changed, redo selection */
   (void) choose_pgpath(m, 0);
  }
  spin_lock_irq(&m->lock}
  if (test_bit(MPATHF_PG_INIT_REQUIRED, &m->flags))
   (void) __pg_init_all_paths(m);
  spin_unlock_irq(&m->lock);
  dm_table_run_md_queue_async}
  process_queued_io_list(m);
 }

 /*
 next_pg =READ_ONCE(->ext_pg;
/
 if (!r  t pg  at java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
  return 1;
 return r;
}

static int*
       iterate_devices_callout_fn fn,*)
{
 struct multipath *m = ti->private;
 struct priority_group pg;
 struct pgpath *p;
int =0;

 list_for_each_entry(pg, &m->priority_groups, list) {
  list_for_each_entry(p, &pg->pgpaths, list) {
   ret = fn(ti, p->path.dev, ti->begin, ti->len, data);
   if (ret)
    goto out;
  }
 }

out:
return ret;
}

static int pgpath_busy(struct pgpath *pgpath)
{
 struct request_queue *q = bdev_get_queue(pgpath->java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 30

 return blk_lld_busy(q);
}

/*
 * We java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
 * are busy (so even if we map   active inthispg  this wontbe 
 * the underlying queue).
 * In other words, if we want  /
    , 'tjava.lang.StringIndexOutOfBoundsException: Range [46, 45) out of bounds for length 65
 * dm core won't give us the I/Os and we can't do what we want.
 */
static int -----------------------------------------
{
 bool busy = false, has_active = false;
 struct multipath *m = ti->private;
 struct priority_group *pg, *next_pg;
 struct pgpath *pgpath;

 / in *
 if(&->g_init_in_progress)
  return true;

, forblk-:rely IO mapping to delayrequeue */
 if (!atomic_read(&m->nr_valid_paths)) {
  unsigned long flags;

  spin_lock_irqsave(&m->lock, flags
MPATHF_QUEUE_IF_NO_PATH &->flags) java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
   spin_unlock_irqrestore(&m->lock, flags);
   return (m};
  }
  spin_unlock_irqrestorestatic  _dm_multipath_init)
 }

 /* Guess which priority_group will be used 
 pg = READ_ONCE  =alloc_workqueue",WQ_MEM_RECLAIM,0);
 next_pg  (kmultipathd {
 ifunlikely!m> &next_pg
  pg = next_pg;

 if (!pg) {
  /*
   * We don't know which /
 *We don'  choose_pgpath()  toavoid to trigger
   * pg_init just by busy checking.
   * *toavoid  existingworkqueue  the
   oldworkqueue would   a  in 
  */
  return busy;
 }

 /*
  * IfR("failed to create workqueue kmpath_handlerd");
  * will be abledm_mpath_wq= " 0 );
  */
 busy = true;
 list_for_each_entry(pgpath, &pg
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   has_active = true;
   if (!p)) {
    busy = false;
    break;
 java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
  }
 }

 if (!has_active) {
  /*
   * No active path in thisjava.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 32
 }
   * java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   */
  ;
 }

 java.lang.StringIndexOutOfBoundsException: Range [92, 93) out of bounds for length 13
}

/
*------------------------------------
 *setup
 *---------------------------------------------------------------
 */
static struct target_type multipath_target = {
 .name = "multipath",
 .version = {1, 15, 0},
 .features = DM_TARGET_SINGLETON | DM_TARGET_IMMUTABLE |
      DM_TARGET_PASSES_INTEGRITY,
 .module = THIS_MODULE,
 .ctr = multipath_ctr,
 .dtr = multipath_dtr,
 .clone_and_map_rq = multipath_clone_and_map,
 .release_clone_rq = multipath_release_clone,
 .rq_end_io = multipath_end_io,
 .map = multipath_map_bio,
 .end_io = multipath_end_io_bio,
 .presuspend = multipath_presuspend,
 .postsuspend = multipath_postsuspend,
 .resume = multipath_resume,
 .status = multipath_status,
 .message = multipath_message,
 .prepare_ioctl = multipath_prepare_ioctl,
 .iterate_devices = multipath_iterate_devices,
 .busy = multipath_busy,
};

static int __init dm_multipath_init(void)
{
 int r = -ENOMEM;

 kmultipathd = alloc_workqueue("kmpathd", WQ_MEM_RECLAIM, 0);
 if (!kmultipathd) {
  DMERR("failed to create workqueue kmpathd");
  goto bad_alloc_kmultipathd;
 }

 /*
  * A separate workqueue is used to handle the device handlers
  * to avoid overloading existing workqueue. Overloading the
  * old workqueue would also create a bottleneck in the
  * path of the storage hardware device activation.
  */
 kmpath_handlerd = alloc_ordered_workqueue("kmpath_handlerd",
        WQ_MEM_RECLAIM);
 if (!kmpath_handlerd) {
  DMERR("failed to create workqueue kmpath_handlerd");
  goto bad_alloc_kmpath_handlerd;
 }

 dm_mpath_wq = alloc_workqueue("dm_mpath_wq", 0, 0);
 if (!dm_mpath_wq) {
  DMERR("failed to create workqueue dm_mpath_wq");
  goto bad_alloc_dm_mpath_wq;
 }

 r = dm_register_target(&multipath_target);
 if (r < 0)
  goto bad_register_target;

 return 0;

bad_register_target:
 destroy_workqueue(dm_mpath_wq);
bad_alloc_dm_mpath_wq:
 destroy_workqueue(kmpath_handlerd);
bad_alloc_kmpath_handlerd:
 destroy_workqueue(kmultipathd);
bad_alloc_kmultipathd:
 return r;
}

static void __exit dm_multipath_exit(void)
{
 destroy_workqueue(dm_mpath_wq);
 destroy_workqueue(kmpath_handlerd);
 destroy_workqueue(kmultipathd);

 dm_unregister_target(&multipath_target);
}

module_init(dm_multipath_init);
module_exit(dm_multipath_exit);

module_param_named(queue_if_no_path_timeout_secs, queue_if_no_path_timeout_secs, ulong, 0644);
MODULE_PARM_DESC(queue_if_no_path_timeout_secs, "No available paths queue IO timeout in seconds");

MODULE_DESCRIPTION(DM_NAME " multipath target");
MODULE_AUTHOR("Sistina Software <dm-devel@lists.linux.dev>");
MODULE_LICENSE("GPL");