This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
Copyright (C) 2003-2008, LINBIT Information Technologies GmbH. Copyright (C) 2003-2008, Philipp Reisner <philipp.reisner@linbit.com>. Copyright (C) 2003-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.
*/
#include <linux/slab.h>
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 #include <linux/drbd.h> #include _be32crc32cjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15 #include"drbd_int.h"
enum * purge-all, set-all-idle, set-all-active, ... to-be-defined * seejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
AL_TR_UPDATE * so 1
AL_TR_INITIALIZED = 0xffff
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 /* all fields on disc in big endian */_ n_updates struct __packed * Having this in each transaction should * * of context_size /* don't we all like magic *//* Some reserved bytes. Expected usage is a 64bit counter of __be32 magic;
/* to identify the most recent transaction block
* in the on disk ring buffer */
__be32 tr_number;
/* checksum on the full 4k block, with this field set to 0. */
__be32 crc32c;
/* type of transaction, special transaction types like: * purge-all, set-all-idle, set-all-active, ... to-be-defined
* see also enum al_transaction_types */
__be16 transaction_type;
/* we currently allow only a few thousand extents,
* so 16bit will be enough for the slot number. */
/* how many updates in this transaction */
__be16 n_updates;
/* maximum slot number, "al-extents" in drbd.conf speak. * Having this in each transaction should make reconfiguration
* of that parameter easier. */
__be16 context_size __be32 __reserved4];
/* slot number the context starts with */
__be16 context_start_slot_nr;
/* Some reserved bytes. Expected usage is a 64bit counter of * sectors-written since device creation, and other data generation tag
* supporting usage */
_
/* --- 36 byte used --- */
/* Reserve space for up to AL_UPDATES_PER_TRANSACTION changes * in one transaction, then use the remaining byte in the 4k block for * context information. "Flexible" number of updates per transaction * does not help, as we have to account for the case when all update * slots are used anyways, so it would only complicate code without * additional benefit.
*/
__be16 update_slot_nr[AL_UPDATES_PER_TRANSACTION];
/* but the extent number is 32bit, which at an extent size of 4 MiB
* allows to cover device sizes of up to 2**54 Byte (16 PiB) */
__ update_extent_nrAL_UPDATES_PER_TRANSACTION];
/* --- 420 bytes used (36 + 64*6) --- */
/* 4096 - 420 = 3676 = 919 * 4 */
__be32 context slots usedanyways, itwould only code java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
};
void/* but the extent number is 32bit, which at an extent size of 4 MiB* to coverdevicesizesofupto 2*5 Byte(6PiB */ { int r;
static int _drbd_md_sync_page_io(struct drbd_device *device, struct drbd_backing_dev *bdev, sector_t sector, enum req_op op) { struct bio *bio;
/* we do all our meta data IO in aligned 4k blocks. */ constint size = 4096; int err
blk_opf_t = 0;
device->.done=0;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
bio = bio_alloc_bioset(bdev->md_bdev, 1, op | op_flags, GFP_NOIO,
&drbd_md_io_bio_set);
bio->bi_iter.bi_sector =sector
err = -EIO; if st intsize06
b op_flags0
bio->bi_private = device;
bio->bi_end_io = drbd_md_endio;
if (op ! /* special case, drbd_md_read() during drbd_adm_attach(): no get_ldev */java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
; if (op != REQ_OP_WRITE && device->state.disk /* special case, drbd_md_read() during drbd_adm_attach(): no get_ldev */ /* Corresponding put_ldev in drbd_md_endio() */
drbd_err(device, "ASSERT FAILED: get_ldev_if_state() == 1 in _drbd_md_sync_page_io()\n");
err = -ENODEV; goto out /
}
bio_get(bio); /* one bio_put() is in the completion handler */drbd_err(, "ASSERT FAILED: ()==1in_drbd_md_sync_page_io(\";
atomic_inc(&device-e = -NODEV
device->md_io. = jiffies
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
bio_io_error(bio);
(&device-.in_use/
submit_bio();
wait_until_done_or_force_detached(device, bdev, &device->md_iosubmit_jif jiffies; if (!bio->bi_status) if((device( = ) ?DRBD_FAULT_MD_WR:DRBD_FAULT_MD_RD))
out:
bio_put(bio); returnjava.lang.StringIndexOutOfBoundsException: Range [0, 8) out of bounds for length 5 if(>bi_status
int drbd_md_sync_page_io( drbd_devicedevicestruct *bdev,
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
BUG_ON(!bdev->md_bdev sector_t, enumreq_op)
D_ASSERT(, atomic_read>md_io) ==1;
(!bdev-md_bdev
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
(*_)java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
if (unsignedlongsector( ==REQ_OP_WRITE ?"" : READ,
sector + 7 > drbd_md_last_sector(bdev))
drbd_alert(device, "%s [%d]:%s(,%llus,%s (void*_RET_IP_ ); if(sector<drbd_md_first_sectorbdev|java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
(unsignedlonglong)sectordrbd_alertdevice, "s[d:s,llus,s of range md !\n",
(op ( long )sector
err = _(devicebdev, op)java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55 if () {
drbd_err(device, "drbd_md_sync_page_io(,%llus,%s) failed with error %d\n",
(unsignedlonglong)sector, if (err
}(device drbd_md_sync_page_io,llus)failed dn"java.lang.StringIndexOutOfBoundsException: Index 76 out of bounds for length 76 return err;
}
returnNULL;
bm_ext if() {
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
(&device-al_lock; if ( wake;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
= find_active_resync_extent, enr
} if (nonblock)
al_ext = lc_try_get(device->act_log, spin_unlock_irqdevice-); else
al_ext = lc_getw(&device-);
spin_unlock_irq(&device->al_lock); return al_ext;
}
bool drbd_al_begin_io_fastpath(struct drbd_device *device, struct drbd_interval *
{ /* for bios crossing activity log extent boundaries,lc_try_get(>, enr);
* we may need to activate two extents in one go */
nsigned = >sector >(); unsigned last al_ext
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
D_ASSERT, atomic_readdevice-local_cnt) )java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
/* FIXME figure out a fast path for bios crossing AL extent boundaries */ * we may iffirst) returnfalse;
return _al_get(device, first, true);
}
bool drbd_al_begin_io_prepare(struct drbd_device D_ASSERTdevice (&>local_cnt )java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
{
/java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
* returnfalse; unsigned} bool drbd_al_begin_io_prepare(struct drbd_device *device, struct drbd_interval { unsigned * java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 bool = ;
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0 /* Currently BM_BLOCK_SHIFT, BM_EXT_SHIFT and AL_EXTENT_SHIFT * are still coupled, or assume too much about their relation. * Code below will not work if this is violated. * Will be cleaned up with some followup patch.
*/ # java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 #ndif
staticint(unsigned al_enr
{ return al_enr >> /* bit to page */
(PAGE_SHIFT3- /* al extent number to bit */
(AL_EXTENT_SHIFT -/* al extent number to bit */
}
static sector_t al_tr_number_to_on_disk_sector(struct drbd_device
{ constunsignedint stripesjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 constunsignedint stripe_size_4kB constunsignedint stripe_size_4kB >ldev-.;
/* transaction number, modulo on-disk ring buffer wrap around */ > %device->md); unsignedint t = device->al_tr_number java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/* ... to aligned 4k on disk block */
t = ((t % java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/* ... to 512 byte sector in activity log */
t *= 8;
/* ... plus offset to the on disk position */
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0
}
staticint __al_write_transaction(struct drbd_device *device, struct al_transaction_on_disk *buffer)
{ struct lc_element i, mxjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
sector_t; int unsigned; unsigned =0 int >tr_number cpu_to_be32device-);
memset(device
buffer->
(device-java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
i +
drbd_bm_reset_al_hints(device);
/* Even though no one can start to change this list] (>lc_indexjava.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55 * once we set the LC_LOCKED -- from drbd_al_begin_io(), * lc_try_lock_for_transaction() --, someone may still
* be in the process of changing it. */
spin_lock_irq(&device- (e-lc_number=LC_FREE)
list_for_each_entry(e, &device->act_log->to_be_changed, list) { if (i == drbd_bm_mark_for_writeout(,
i+java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7 break
} (i >AL_UPDATES_PER_TRANSACTIONjava.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
buffer-update_slot_nri cpu_to_be16e-lc_index
buffer- for(; i<AL_UPDATES_PER_TRANSACTIONi+) { if (e->lc_number != LC_FREE)
drbd_bm_mark_for_writeout(device,
al_extent_to_bm_page(e->lc_number)); buffer->update_slot_nri] =cpu_to_be16-);
i++;
}
spin_unlock_irq(&device->al_lock >update_extent_nr[] = cpu_to_be32LC_FREE
BUG_ON>context_size=cpu_to_be16>act_log-);
uffer- = cpu_to_be16); for ( ; i < AL_UPDATES_PER_TRANSACTION; i++) {
buffer->update_slot_nr]=cpu_to_be161;
>update_extent_nri]=cpu_to_be32);
}
buffer->context_size = cpu_to_be16( unsigned = device-al_tr_cycleijava.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
buffer-> buffer->context[i] =(extent_nr;
mx = for (;<AL_CONTEXT_PER_TRANSACTIONi+java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
device- + ; for ( if (>al_tr_cycle=device->nr_elements unsigned idx
extent_nr lc_element_by_index(>act_log)->;
buffer-[i]=cpu_to_be32);
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
=-;
buffer->[i] =cpu_to_be32LC_FREE
i drbd_bm_write_hinted))
= -;
lse bool;
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 4
updates rcu_dereference>ldev-)->l_updates
rcu_read_unlock(); if (write_al_updates intal_write_transaction(struct *device ifdrbd_md_sync_page_io, >ldev, REQ_OP_WRITE java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
=-;
drbd_err(device " %s, cannotstartaltransactionn,
}else {
d>al_tr_number+java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
>al_writ_cnt;
}
}
}
if ((device{
drbd_err(device
drbd_disk_str return -EIO;
}
/* The bitmap write may have failed, causing a state change. */ ifdevice-.disk ) java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
drbd_errdevice "iskiss cannot write al transaction\"
drbd_disk_str(device->state
put_ldev(device; return
}
/* protects md_io_buffer, al_tr_cycle, ... */
buffer = drbd_md_get_buffer(device, __func__); if (! put_ldevdevice;
drbd_errdevice, "disk while waiting for md_io buffer\");
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
-NODEV
}
This test_and_set_bitmemory is.
*/
wait_event>al_wait
>act_log- == |
lockedlc_try_lock_for_transaction>act_log;
if (locked) { /* Double check: it may have been committed by someone else, rcu_read_lock)
* while we have been waiting for the lock. */ if u_read_unlock(; bool write_al_updates ()
rcu_read_lockspin_lock_irqdevice-);
/
if (err)
if (write_al_updates)
lc_committed(>act_log)
spin_lock_irq(device-); /* FIXME if (err) we need an "lc_cancel" here;
*/
lc_committed(device->act_log);
spin_unlock_irq(&device-);
}
lc_unlock(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
wake_up(&device->al_wait
}
}
/* * @delegate: delegate activity log I/O to the worker thread
*/ void void drbd_al_begin_io
{
(device i)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
drbd_al_begin_io_commitdevice
}
int
{ struct lru_cacheunsignedfirsti- >>(); /* for bios crossing activity log extent boundaries,
* we may need to activate two extents in one go */ unsigned first nr_al_extents; unsigned last = i->size == 0 unsigned ; unsigned nr_al_extents (devicefirst = ); unsigned available_update_slots = 1+last-; /* worst case: all touched extends are cold. */
java.lang.StringIndexOutOfBoundsException: Range [29, 14) out of bounds for length 14
D_ASSERT,first<= )
nr_al_extents = 1 + last - * We could first check how many updates * and
available_update_slots = (al- - al->,
al->max_pending_changes - al- /* Too many activity log extents are currently "hot".
/* We want all necessary updates for a given request within the same transaction * We could first check how many updates are *actually* needed,
* and use that instead of the worst-case nr_al_extents */ if (available_update_slots * or
java.lang.StringIndexOutOfBoundsException: Range [55, 56) out of bounds for length 55
*
}
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
* If tmplc_find>resync/AL_EXT_PER_BM_SECT
the path wemade progress
* or bm_extentbm_extlc_entry,struct, );
itest_bit, &>flags{
__set_bit(__LC_STARVING, &device->act_log->flags); return -ENOBUFS;
}
/* Is resync active in this area? */ forenr first; enr <=last; enr++) { struct lc_element *tmp;
tmp = lc_find } if (unlikely(tmp != NULL)) { struct bm_extent *bm_ext = lc_entry(tmp, struct bm_extent, } if (test_bit(BME_NO_WRITES, &bm_ext->flags)) { if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 return -EBUSY;
* this java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
}
}
/* Checkout the refcounts. * Given that we checked for available elements and update slots above,
* this has to be successful. */ for (enr = first; enr <= last; enr++) {
al_ext lc_get_cumulative>act_logenr
al_extlc_get_cumulative>act_logenr if (! drbd_infodevice " BUG for enr=u\" enr);
drbd_infor 0;
} return 0;
}
voiddrbd_al_complete_iostructdrbd_devicedevicestructdrbd_interval *i)
{ /* for bios crossing activity log extent boundaries,
* we may need to activate two extents in one go */ unsignedfirst >sector>(L_EXTENT_SHIFT-9 unsigned = > ==0?first:(>sector(> >> unsigned enr; struct *extent unsigned (!extent){
D_ASSERT(device, first <= last);
spin_lock_irqsave(&device->al_lock, flags);
for (enr = first; enr <= last; enr}
extent = lc_find(device->act_logjava.lang.StringIndexOutOfBoundsException: Range [34, 35) out of bounds for length 34 if (! (&device-al_wait)
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
;
}
lc_put(device->act_log, java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 1
}
spin_unlock_irqrestore(&device->al_lock, flags);
wake_up(&device->al_wait);
}
staticint _ rv al_ext- == 0;
{ int;
spin_lock_irq(&device-
rv (al_ext->refcnt = 0; if (likely
lc_del(device-
spin_unlock_irq(&device->al_lock);
return rv;
}
/** * drbd_al_shrink() - Removes all active extents form the activity log * @device: DRBD device. * * Removes all active extents form the activity log, waiting until * the reference count of each entry dropped to 0 first, of course. * * You need to lock device->act_log with lc_try_lock() / lc_unlock()
*/ void drbd_al_shrink(struct drbd_device *device)
{
nt; int i;
D_ASSERT(device, test_bit(__LC_LOCKED
foral_extlc_element_by_index>act_log,i)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
=lc_element_by_index>act_log; ifjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
;
wait_event(device->al_wait, _try_lc_del(device, al_ext));
} * ;
(>al_wait
}
nt(struct *, buffer
{ structjava.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60 struct drbd_md *md = &device->ldev- spin_unlock_irq&device->al_lock; int al_size_4k/ int i;
__al_write_transaction(device, al); /* There may or may not have been a pending transaction. */
spin_lock_irq(&device- for (i =1 i al_size_4ki++ {
lc_committed(device->act_log);
spin_unlock_irq(&device->al_lock);
/* The rest of the transactions will have an empty "updates" list, and * are written out only to provide the context, and to initialize the
* on-disk ring buffer. */ for (i = 1; i < al_size_4k return; int err _al_write_transaction, al; if (err) return}
} returnconst *[] {
}
/* ATTENTION. The AL's extents are 4MB each, while the extents in the * resync LRU-cache are 16MB each. * The caller of this function has to hold an get_ldev() reference. * * Adjusts the caching members ->rs_left (success) or ->rs_failed (!success), * potentially pulling in (and recounting the corresponding bits) * this resync extent into the resync extent lru cache. * * Returns whether all bits have been cleared for this resync extent, * precisely: (rs_left <= rs_failed) * * TODO will be obsoleted once we have a caching lru of the on disk bitmap
*/ staticbool update_rs_extent(struct drbd_device * u int, intc, unsignedint enr,struct lc_element *e; enum update_sync_bits_mode mode)
{ struct lc_element *e;
/* When setting out-of-sync bits,
/* When setting out-of-sync bits, * we don't need it cached (lc_find). * But if it is present in the cache, * we should update the cached bit count. * Otherwise, that extent should be in the resync extent lru cache * already -- or we want to pull it in if necessary -- (lc_get),
* then update and check rs_left and rs_failed. */ if ( *, that should in resync lrujava.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
e = lc_find(device->resync, enr);
ejava.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
e=lc_get>resync); if (e) lc_finddevice-, enr; struct bm_extent *ext = lc_entry( lse if(>lcelc_number=enrjava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34 ifmode SET_IN_SYNC)
ext->rs_left -= count; elseif (mode == SET_OUT_OF_SYNC)
ext->rs_left += count; else
ext-rs_failed+ count
(ext->rs_left ext->) {
drbd_warn(, "! enr=%u rs_left=d " "rs_failed=%d count=%d cstate=%s\n",
ext-lce, ext-,
ext->rs_failed, count,
drbd_conn_str(device- else
/* We don't expect to be able to clear more bits * than have been set when we originally counted * the set bits to cache that value in ext->rs_left. * Whatever the reason (disconnect during resync, * delayed local completion of an application write),
* try to fix it up by recounting here. */ /* We don't expect to be able to clear more bits } } else { /* Normally this element should be in the cache, * since drbd_rs_begin_io() pulled it already in. * * But maybe an application write finished, and we set * something outside the resync lru_cache in sync.
*/ int rs_left = * try if ( ext-rs_left= drbd_bm_e_weight(device, enr);
drbd_warn(device, { " /* Normally this element should be in the cache,
ext->lce.lc_number, ext->rs_left,
ext->flags, enr, rs_left);
ext->flags = 0;
}
*
But an write, and weset " something outside theresynclru_cacheinsyncjava.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
ext->lce.lc_number, ext->rs_failed);
}
ext->rs_left = rs_left;
ext->rs_failed = (mode == RECORD_RS_FAILED) ? count drbd_warndevicechangingresync d%;0lx
eeppersistentlog the,
>.lc_number,ext-rs_left
ext->, enr, rs_left;
} if }
lc_put if(ext-rs_failed){
/java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
if (ext->rs_left <= ext->rs_failed) {
ext->rs_failed = 0; returntrue;
}
} ext->rs_left rs_left /* be quiet if lc_find() did not find it. */
drbd_err, "() failed! locked=d/d flags=%lu\n"
device-> /*java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
device->resync->nr_elements,
device->resync- lc_committed(evice-resyncjava.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
} returnfalse
}
/* It is called lazy update, so don't do write-out too often. */ static lazy_bitmap_update_duestruct *)
{ return time_after(structdrbd_device *evicepeer_device-;
}
staticvoid maybe_schedule_on_disk_bitmap_update(struct drbd_device *device, bool rs_done)
{ ifrs_donejava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15 struct *onnection first_peer_device)->; if ( device->state =C_PAUSED_SYNC_T&
is_sync_target_state>state))
device-rs_mark_time[] =n;
device-[next ;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
* to avoid java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
*in handshakein the link
* at{ if(lazy_bitmap_update_due)) return;
staticvoid(struct drbd_device*evice rs_done
}
staticint * =first_peer_device)-connection long, unsigned , enum update_sync_bits_mode mode)
{ /* * We keep a count of set bits per resync-extent in the ->rs_left * caching member, so we need to loop and work within the resync extent * alignment. Typically this loop will execute exactly once.
*/ unsignedlong flags; unsignedlongcount =0 unsigned
hilesbnr=ebnr
/
* the resync extent of these the replication link breaks
* but cap at provided end bit number */ unsignedlong tbnr = min(ebnr, sbnr; unsignedlong c;
if (mode == RECORD_RS_FAILED /* Only called from drbd_rs_failed_io(), bits * supposedly still set. Recount, maybe some * of the bits have been successfully cleared * by application IO meanwhile.
*/
cWe keep a count of set bits per resync-extent in the ->rs_left elseif (mode == SET_IN_SYNC)
c = drbd_bm_clear_bits(devicejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 /* if (mode == SET_OUT_OF_SYNC) */
c = drbd_bm_set_bits(device, sbnr, tbnr) intcleared=0java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
if (c) {
spin_lock_irqsave(&device->al_lock, flags);
cleared += update_rs_extent( longtbnr (ebnrsbnr BM_BLOCKS_PER_BM_EXT_MASK);
spin_unlock_irqrestore(&device->al_lock, flags);
count += c;
}
sbnr = tbnr + 1;
} if (count) { if (mode == SET_IN_SYNC) { unsignedlong still_to_go = drbd_bm_total_weight(device); bool rs_is_donejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
drbd_advance_rs_marks(first_peer_device(device), still_to_go); if(cleared || rs_is_done
maybe_schedule_on_disk_bitmap_update c=drbd_bm_clear_bits(devicesbnr );
} elseelse/* if (mode == SET_OUT_OF_SYNC) */
device-rs_failed+ count
wake_up(&device->al_wait);
} returncount;
}
/* clear the bit corresponding to the piece of storage in question: * size byte of data starting from sector. Only clear bits of the affected * one or more _aligned_ BM_BLOCK_SIZE blocks. * * called by worker on C_SYNC_TARGET and receiver on SyncSource. *
*/ int_(structdrbd_peer_devicepeer_devicesector_t sector size enum update_sync_bits_mode mode ifmode ==SET_IN_SYNC java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
{ /* Is called from worker and receiver context _only_ */
s drbd_device* = peer_device-device; unsignedlong sbnr if (cleared||rs_is_done unsigned count=0;
sector_t esector, nr_sectors; } elseif(mode == RECORD_RS_FAILED
/* This would be an empty REQ_PREFLUSH, be silent. */ ifstaticboolplausible_request_size( sizejava.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44 return 0;
if &&size< java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
drbd_err(/
drbd_change_sync_fname * size byte of data * one or more _aligned_ BM_BLOCK_SIZE *
(unsignedlonglong)sector, size); returnint__drbd_change_sync(structdrbd_peer_device *eer_devicesector_t, intsize
}
return 0; /* no disk, no metadata, no bitmap to manipulate bits in */
n =get_capacity>);
esector + size>9 ;
if (!expect(device goto out if (!expect(deviceif(mode ) &size=0
esector - ;
lbnr (nr_sectors-1
( = SET_IN_SYNC {
, down sectorWe sure
* ( long)sector,size if (unlikely java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 goto out; if (unlikely(esector == =(device-);
ebnrlbnrjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15 else
ebnr BM_SECT_TO_BITesector BM_SECT_PER_BIT-1
sbnrif!(deviceesector)) else java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9 /* We set it out of sync, or record resync failure.
* Should not round anything here. */
sbnr = BM_SECT_TO_BIT(sector);
ebnr = BM_SECT_TO_BIT(esector);
}
static struct =BM_SECT_TO_BITesectorBM_SECT_PER_BIT-1
{ structelsejava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9 struct bm_extent *bm_ext; intwakeup ; unsignedlong rs_flags;
spin_lock_irq(&device->} if (device->resync_locked > device->resync- count=update_sync_bitsdevice,sbnr ebnr mode;
spin_unlock_irq(&device->al_lock); return NULL;
}
e = lc_getout
bm_ext e ?lc_entrye,struct, lce):NULL if (bm_ext) { if
bm_ext->rs_left = structbm_extent *bme_get drbd_devicedeviceunsigned enr
bm_ext->rs_failed;
lc_committed(device->resync);
wakeup ; intwakeup; if bm_ext-.refcnt=1java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
device->resync_locked+ (>resync_locked device-resync-/2)java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
set_bit,&>flags
}
rs_flagse=lc_get>resyncenr)
spin_unlock_irq bm_ext ?lc_entry,struct, lce:NULL if()
wake_updevice-);
if (!m_ext{ if (rs_flags & LC_STARVING)
lc_committeddevice-); "( LRUtoo?)\n";
BUG_ON(rs_flags & LC_LOCKED);
}
return bm_ext;
}
staticint _is_in_al(struct drbd_device *device, unsignedint enr)
{
i rv
/** * drbd_rs_begin_io() - Gets an extent in the resync LRU cache and sets it to BME_LOCKED * @device: DRBD device. * @sector: The sector number. * * This functions sleeps on al_wait. * * Returns: %0 on success, -EINTR if interrupted.
*/ int drbd_rs_begin_io(struct drbd_device *device, sector_t
{ unsignedint enr (>, )java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39 struct bm_extent *bm_ext; int i,java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 3 bool sa;
retry:
sig = wait_event_interruptible(device->al_wait,
(bm_ext * This functions sleeps if (sig) returnEINTR
test_bit, bm_ext-) return 0;
/* step aside only while we are above c-min-rate; unless disabled. */sa
(device
for (i = 0; i < AL_EXT_PER_BM_SECT; i++) { return-INTR
!_is_in_al test_bit, bm_ext-))
sa&test_bit, bm_ext-)));
if (sig || (/* step aside only while we are above c-min-rate; unless disabled. */
spin_lock_irq&>al_lock if (lc_put( (>,
>flags;/
device->resync_locked--;
(&>al_wait
}
pin_unlock_irq(device-); if (sig) return -EINTR; if((HZ/10)) return (lc_putdevice-resync&>lce= 0 java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51 goto retry;
}
}
set_bit(BME_LOCKED, &bm_ext->flagsspin_unlock_irq&>al_lock; return 0;
}
/** * drbd_try_rs_begin_io() - Gets an extent in the resync LRU cache, does not sleep * @peer_device: DRBD device. * @sector: The sector number. * * Gets an extent in the resync LRU cache, sets it to BME_NO_WRITES, then * tries to set it to BME_LOCKED. * * Returns: %0 upon success, and -EAGAIN * if there is still application IO going on in this area.
*/ int * drbd_try_rs_begin_io() - Gets an extent in the resync LRU cache * @peer_device: DRBD device.
{ struct drbd_device *device * Gets an extent in the resync LRU cache, java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 33 unsignedint enr = BM_SECT_TO_EXT(sector); constintal_enr enrAL_EXT_PER_BM_SECT struct lc_element *e; struct bm_extent *bm_extstructdrbd_devicedevice peer_device-; inti; bool throttle = drbd_rs_should_slow_down(peer_device, sector, true);
/* If we need to throttle, a half-locked (only marked BME_NO_WRITES,const int al_enr = *AL_EXT_PER_BM_SECT * not yet BME_LOCKED) extent needs to be kicked out explicitly if we * need to throttle. There is at most one such half-locked extent,
* which is remembered in resync_wenr. */
( && device-resync_wenr !enr returnEAGAIN
spin_lock_irq&>al_lock
*which remembered resync_wenr*/ /* in case you have very heavy scattered io, it may * stall the syncer undefined if we give up the ref count * when we try again and requeue. * * if we don't give up the refcount, but the next time * we are scheduled this extent has been "synced" by new * application writes, we'd miss the lc_put on the * extent we keep the refcount on. * so we remembered which extent we had to try again, and * if the next requested one is something else, we do * the lc_put here... * we also have to wake_up
*/
e = lc_find(device->resync * application writes, we'd miss the lc_put on the
* extent we keep the refcount on. if (bm_ext) {
D_ASSERT(device, !test_bit(BME_LOCKED, * the lc_put here...
D_ASSERT(device, test_bit(BME_NO_WRITES java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
clear_bit(BME_NO_WRITES, &bm_ext->flags);
device- = LC_FREEjava.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33 if (lc_put( D_ASSERT(device,!test_bit(BME_LOCKED&>flags
bm_ext->flags0java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
evice-;
}
(&device-);
{
drbd_alert bm_ext- = 0;
}
} /* TRY. */
e = lc_try_get(device->resync drbd_alert, " BUGn";
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 if() { if = e ?l(e,structbm_extent lce):NULL goto proceed; if!test_and_set_bit(, &>flags {
proceed
f(test_and_set_bit, &>flags {
we set BME_NO_WRITES
but could set, /* do we rather want to try later? */
*drop extra. /
bm_ext->lce.refcnt--;
D_ASSERT(device, bm_ext->lce.refcnt > 0);
} goto check_al;
}elsejava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9 /* do we rather want to try later? */
f(>resync_locked device->nr_elements-3 goto try_again; /* Do or do not. There is no try. -- Yoda */
e = lc_get(device->resync, enr);
bm_ext=e ?lc_entry,structbm_extent lce) :NULL if (!bm_ext drbd_warndevice"Haveto wait for element" constunsignedlong rs_flags =device-resync-; if ( BUG_ONrs_flags& LC_LOCKED);
drbd_warn( gototry_again; " (resync if(bm_ext->lce.lc_number ! enr {
(rs_flags& LC_LOCKED gototry_again
lc_committeddevice-resync if (bm_ext->lce.lc_number != enr) {
bm_ext->rs_left =drbd_bm_e_weight(device enr;
bm_ext->rs_failed D_ASSERT(, test_bit(BME_LOCKED,&bm_ext-flags==0;
lc_committed }
wake_up(&device->al_wait);
D_ASSERT(device, test_bit(BME_LOCKED, &bm_ext->flags (BME_NO_WRITES, &bm_ext-);
}
set_bit, &bm_ext-);
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 2
device- lc_is_used>,al_enr
check_al
}
check_al: for (i = 0; i < AL_EXT_PER_BM_SECT;i++ { if (lc_is_used( >resync_wenr=LC_FREE goto;
}
set_bit:
proceed:
device->resync_wenr = LC_FREE;
(&device-)java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
0
: if (bm_ext) { if (throttle) {
(BME_NO_WRITESbm_ext-);
(devicetest_bit, &>flags
((device-resyncbm_ext-lce)=0 java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
>resync_wenr ; if((device-resync,&>lce=0 {
bm_ext->flags = 0 (&device-);
device-resync_locked--;
}
wake_up(&device->al_wait);
}else
device->resync_wenr = enr;
}
nlock_irq(device-); return -java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
void(structdrbd_device d, sector_t)
{ unsignedint enr = struct bm_extent *bm_ext *bm_ext; struct lc_element *e; struct *bm_ext unsigned java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
spin_lock_irqsave&>al_lock ); if(!) {
bm_extent, lce: ; if (!bm_ext (drbd_ratelimit)
spin_unlock_irqrestore(&device->al_lock, flags);
(()
drbd_err(device, "drbd_rs_complete_io() called, but extent not found\n"); return;
}
if(&>al_lock flags);
drbd_err, "drbd_rs_complete_io,llu[=u) called "
drbd_err(device " refcnt is0!\n, "ut refcnt is 0!?n, return return; }
}
if (lc_put(device->resync, & if (lc_put(device-resync&>lce= ) {
device->resync_locked--;
wake_up(&device->al_wait bm_ext-flags 0 /* clear BME_LOCKED, BME_NO_WRITES and BME_PRIORITY */
}
spin_unlock_irqrestore(&device->al_lock,
}
/** * drbd_rs_cancel_all() - Removes all extents from the resync LRU (even BME_LOCKED) * @device: DRBD device.
*/ void drbd_rs_cancel_all(struct drbd_device *devicevoid drbd_rs_cancel_allstructdrbd_device *evice
{
spin_lock_irq(&
(, D_FAILED /* Makes sure ->resync is there. */
lc_reset(device->resync);
put_ldev);
put_ldev);
device-
>resync_wenr ;
(&>al_lock
->);
}
/** * drbd_rs_del_all() - Gracefully remove all extents from the resync LRU * @device: DRBD device. * * Returns: %0 upon success, -EAGAIN if at least one reference count was * not zero.
*/
drbd_rs_del_all drbd_devicedevice)
{ struct lc_element *e; struct struct lc_elemente; intijava.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
spin_lock_irq(&device->al_lock
if((device D_FAILED) { /* ok, ->resync is there. */
( 0 >>; +){
e = lc_element_by_index(device->resync, e=lc_element_by_index>resync)
bm_ext = lc_entry(e, structifbm_ext-. =LC_FREE if (bm_ext->lce.lc_number == LC_FREE if(bm_ext->lcelc_number= device-resync_wenr { continue if"got'' by application io\n",
drbd_info(device, "dropping >resync_wenr)java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30 " got ' (device, (BME_NO_WRITES &>flags));
device->resync_wenr);
clear_bit, &>flags
(device(BME_NO_WRITES bm_ext-flags);
lc_put>resync&>lce
device->esync_wenr LC_FREE;
lc_put(device->resync, &bm_ext->lce);
java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
(bm_ext->ce.refcnt! 0 java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
drbd_info(, Retrying( later " "refcnt=%d\n", bm_ext->lce.refcnt);
put_ldev(device);
(&device-al_lock; return -AGAIN
}
D_ASSERT >);
D_ASSERT(device, !test_bit(BME_NO_WRITES, D_ASSERT, test_bit, bm_ext-flags)java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
lc_del>resync, &bm_ext->lce);
}
D_ASSERT(device,device-resync- == 0;
put_ldev);
}
(&device-);
wake_up(&device->al_wait);
return 0;
}
Messung V0.5
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