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Merge branch 'for-2.6.39/drivers' of git://git.kernel.dk/linux-2.6-block 

* 'for-2.6.39/drivers' of git://git.kernel.dk/linux-2.6-block: (122 commits)
  cciss: fix lost command issue
  drbd: need include for bitops functions declarations
  Revert "cciss: Add missing allocation in scsi_cmd_stack_setup and  corresponding deallocation"
  cciss: fix missed command status value CMD_UNABORTABLE
  cciss: remove unnecessary casts
  cciss: Mask off error bits of c->busaddr in cmd_special_free when calling pci_free_consistent
  cciss: Inform controller we are using 32-bit tags.
  cciss: hoist tag masking out of loop
  cciss: Add missing allocation in scsi_cmd_stack_setup and  corresponding deallocation
  cciss: export resettable host attribute
  drbd: drop code present under #ifdef which is relevant to 2.6.28 and below
  drbd: Fixed handling of read errors on a 'VerifyS' node
  drbd: Fixed handling of read errors on a 'VerifyT' node
  drbd: Implemented real timeout checking for request processing time
  drbd: Remove unused function atodb_endio()
  drbd: improve log message if received sector offset exceeds local capacity
  drbd: kill dead code
  drbd: don't BUG_ON, if bio_add_page of a single page to an empty bio fails
  drbd: Removed left over, now wrong comments
  drbd: serialize admin requests for new verify run with pending bitmap io
  ...
This commit is contained in:
Linus Torvalds 2011-03-27 20:02:07 -07:00
parent 93567c43eb 1ddd504954
commit 8d49a77568
21 changed files with 2273 additions and 1409 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
View File

@ -59,3 +59,15 @@ Kernel Version: 2.6.31
Contact: iss_storagedev@hp.com
Description: Displays the usage count (number of opens) of logical drive Y
of controller X.
Where: /sys/bus/pci/devices/<dev>/ccissX/resettable
Date: February 2011
Kernel Version: 2.6.38
Contact: iss_storagedev@hp.com
Description: Value of 1 indicates the controller can honor the reset_devices
kernel parameter. Value of 0 indicates reset_devices cannot be
honored. This is to allow, for example, kexec tools to be able
to warn the user if they designate an unresettable device as
a dump device, as kdump requires resetting the device in order
to work reliably.

86
drivers/block/cciss.c
View File

@ -193,7 +193,7 @@ static int __devinit cciss_find_cfg_addrs(struct pci_dev *pdev,
u64 *cfg_offset);
static int __devinit cciss_pci_find_memory_BAR(struct pci_dev *pdev,
unsigned long *memory_bar);
static inline u32 cciss_tag_discard_error_bits(ctlr_info_t *h, u32 tag);
/* performant mode helper functions */
static void calc_bucket_map(int *bucket, int num_buckets, int nsgs,
@ -231,7 +231,7 @@ static const struct block_device_operations cciss_fops = {
*/
static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c)
{
if (likely(h->transMethod == CFGTBL_Trans_Performant))
if (likely(h->transMethod & CFGTBL_Trans_Performant))
c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
}
@ -556,6 +556,44 @@ static void __devinit cciss_procinit(ctlr_info_t *h)
#define to_hba(n) container_of(n, struct ctlr_info, dev)
#define to_drv(n) container_of(n, drive_info_struct, dev)
/* List of controllers which cannot be reset on kexec with reset_devices */
static u32 unresettable_controller[] = {
0x324a103C, /* Smart Array P712m */
0x324b103C, /* SmartArray P711m */
0x3223103C, /* Smart Array P800 */
0x3234103C, /* Smart Array P400 */
0x3235103C, /* Smart Array P400i */
0x3211103C, /* Smart Array E200i */
0x3212103C, /* Smart Array E200 */
0x3213103C, /* Smart Array E200i */
0x3214103C, /* Smart Array E200i */
0x3215103C, /* Smart Array E200i */
0x3237103C, /* Smart Array E500 */
0x323D103C, /* Smart Array P700m */
0x409C0E11, /* Smart Array 6400 */
0x409D0E11, /* Smart Array 6400 EM */
};
static int ctlr_is_resettable(struct ctlr_info *h)
{
int i;
for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
if (unresettable_controller[i] == h->board_id)
return 0;
return 1;
}
static ssize_t host_show_resettable(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ctlr_info *h = to_hba(dev);
return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h));
}
static DEVICE_ATTR(resettable, S_IRUGO, host_show_resettable, NULL);
static ssize_t host_store_rescan(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
@ -741,6 +779,7 @@ static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
static struct attribute *cciss_host_attrs[] = {
&dev_attr_rescan.attr,
&dev_attr_resettable.attr,
NULL
};
@ -973,8 +1012,8 @@ static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c)
temp64.val32.upper = c->ErrDesc.Addr.upper;
pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
c->err_info, (dma_addr_t) temp64.val);
pci_free_consistent(h->pdev, sizeof(CommandList_struct),
c, (dma_addr_t) c->busaddr);
pci_free_consistent(h->pdev, sizeof(CommandList_struct), c,
(dma_addr_t) cciss_tag_discard_error_bits(h, (u32) c->busaddr));
}
static inline ctlr_info_t *get_host(struct gendisk *disk)
@ -1490,8 +1529,7 @@ static int cciss_bigpassthru(ctlr_info_t *h, void __user *argp)
return -EINVAL;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
ioc = (BIG_IOCTL_Command_struct *)
kmalloc(sizeof(*ioc), GFP_KERNEL);
ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
if (!ioc) {
status = -ENOMEM;
goto cleanup1;
@ -2653,6 +2691,10 @@ static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
c->Request.CDB[0]);
return_status = IO_NEEDS_RETRY;
break;
case CMD_UNABORTABLE:
dev_warn(&h->pdev->dev, "cmd unabortable\n");
return_status = IO_ERROR;
break;
default:
dev_warn(&h->pdev->dev, "cmd 0x%02x returned "
"unknown status %x\n", c->Request.CDB[0],
@ -3103,6 +3145,13 @@ static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_UNABORTABLE:
dev_warn(&h->pdev->dev, "cmd %p unabortable\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC ?
DID_PASSTHROUGH : DID_ERROR);
break;
default:
dev_warn(&h->pdev->dev, "cmd %p returned "
"unknown status %x\n", cmd,
@ -3136,10 +3185,13 @@ static inline u32 cciss_tag_to_index(u32 tag)
return tag >> DIRECT_LOOKUP_SHIFT;
}
static inline u32 cciss_tag_discard_error_bits(u32 tag)
static inline u32 cciss_tag_discard_error_bits(ctlr_info_t *h, u32 tag)
{
#define CCISS_ERROR_BITS 0x03
return tag & ~CCISS_ERROR_BITS;
#define CCISS_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
#define CCISS_SIMPLE_ERROR_BITS 0x03
if (likely(h->transMethod & CFGTBL_Trans_Performant))
return tag & ~CCISS_PERF_ERROR_BITS;
return tag & ~CCISS_SIMPLE_ERROR_BITS;
}
static inline void cciss_mark_tag_indexed(u32 *tag)
@ -3359,7 +3411,7 @@ static inline u32 next_command(ctlr_info_t *h)
{
u32 a;
if (unlikely(h->transMethod != CFGTBL_Trans_Performant))
if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
return h->access.command_completed(h);
if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
@ -3394,14 +3446,12 @@ static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
/* process completion of a non-indexed command */
static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
{
u32 tag;
CommandList_struct *c = NULL;
__u32 busaddr_masked, tag_masked;
tag = cciss_tag_discard_error_bits(raw_tag);
tag_masked = cciss_tag_discard_error_bits(h, raw_tag);
list_for_each_entry(c, &h->cmpQ, list) {
busaddr_masked = cciss_tag_discard_error_bits(c->busaddr);
tag_masked = cciss_tag_discard_error_bits(tag);
busaddr_masked = cciss_tag_discard_error_bits(h, c->busaddr);
if (busaddr_masked == tag_masked) {
finish_cmd(h, c, raw_tag);
return next_command(h);
@ -3753,7 +3803,8 @@ static void __devinit cciss_wait_for_mode_change_ack(ctlr_info_t *h)
}
}
static __devinit void cciss_enter_performant_mode(ctlr_info_t *h)
static __devinit void cciss_enter_performant_mode(ctlr_info_t *h,
u32 use_short_tags)
{
/* This is a bit complicated. There are 8 registers on
* the controller which we write to to tell it 8 different
@ -3808,7 +3859,7 @@ static __devinit void cciss_enter_performant_mode(ctlr_info_t *h)
writel(0, &h->transtable->RepQCtrAddrHigh32);
writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
writel(0, &h->transtable->RepQAddr0High32);
writel(CFGTBL_Trans_Performant,
writel(CFGTBL_Trans_Performant | use_short_tags,
&(h->cfgtable->HostWrite.TransportRequest));
writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
@ -3855,7 +3906,8 @@ static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
goto clean_up;
cciss_enter_performant_mode(h);
cciss_enter_performant_mode(h,
trans_support & CFGTBL_Trans_use_short_tags);
/* Change the access methods to the performant access methods */
h->access = SA5_performant_access;

1
drivers/block/cciss.h
View File

@ -222,6 +222,7 @@ static void SA5_submit_command( ctlr_info_t *h, CommandList_struct *c)
h->ctlr, c->busaddr);
#endif /* CCISS_DEBUG */
writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
readl(h->vaddr + SA5_REQUEST_PORT_OFFSET);
h->commands_outstanding++;
if ( h->commands_outstanding > h->max_outstanding)
h->max_outstanding = h->commands_outstanding;

1
drivers/block/cciss_cmd.h
View File

@ -56,6 +56,7 @@
#define CFGTBL_Trans_Simple 0x00000002l
#define CFGTBL_Trans_Performant 0x00000004l
#define CFGTBL_Trans_use_short_tags 0x20000000l
#define CFGTBL_BusType_Ultra2 0x00000001l
#define CFGTBL_BusType_Ultra3 0x00000002l

13
drivers/block/cciss_scsi.c
View File

@ -824,13 +824,18 @@ static void complete_scsi_command(CommandList_struct *c, int timeout,
break;
case CMD_UNSOLICITED_ABORT:
cmd->result = DID_ABORT << 16;
dev_warn(&h->pdev->dev, "%p aborted do to an "
dev_warn(&h->pdev->dev, "%p aborted due to an "
"unsolicited abort\n", c);
break;
case CMD_TIMEOUT:
cmd->result = DID_TIME_OUT << 16;
dev_warn(&h->pdev->dev, "%p timedout\n", c);
break;
case CMD_UNABORTABLE:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev, "c %p command "
"unabortable\n", c);
break;
default:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev,
@ -1007,11 +1012,15 @@ cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c)
break;
case CMD_UNSOLICITED_ABORT:
dev_warn(&h->pdev->dev,
"%p aborted do to an unsolicited abort\n", c);
"%p aborted due to an unsolicited abort\n", c);
break;
case CMD_TIMEOUT:
dev_warn(&h->pdev->dev, "%p timedout\n", c);
break;
case CMD_UNABORTABLE:
dev_warn(&h->pdev->dev,
"%p unabortable\n", c);
break;
default:
dev_warn(&h->pdev->dev,
"%p returned unknown status %x\n",

335
drivers/block/drbd/drbd_actlog.c
View File

@ -92,7 +92,7 @@ static int _drbd_md_sync_page_io(struct drbd_conf *mdev,
bio->bi_end_io = drbd_md_io_complete;
bio->bi_rw = rw;
if (FAULT_ACTIVE(mdev, (rw & WRITE) ? DRBD_FAULT_MD_WR : DRBD_FAULT_MD_RD))
if (drbd_insert_fault(mdev, (rw & WRITE) ? DRBD_FAULT_MD_WR : DRBD_FAULT_MD_RD))
bio_endio(bio, -EIO);
else
submit_bio(rw, bio);
@ -176,13 +176,17 @@ static struct lc_element *_al_get(struct drbd_conf *mdev, unsigned int enr)
struct lc_element *al_ext;
struct lc_element *tmp;
unsigned long al_flags = 0;
int wake;
spin_lock_irq(&mdev->al_lock);
tmp = lc_find(mdev->resync, enr/AL_EXT_PER_BM_SECT);
if (unlikely(tmp != NULL)) {
struct bm_extent *bm_ext = lc_entry(tmp, struct bm_extent, lce);
if (test_bit(BME_NO_WRITES, &bm_ext->flags)) {
wake = !test_and_set_bit(BME_PRIORITY, &bm_ext->flags);
spin_unlock_irq(&mdev->al_lock);
if (wake)
wake_up(&mdev->al_wait);
return NULL;
}
}
@ -258,6 +262,33 @@ void drbd_al_complete_io(struct drbd_conf *mdev, sector_t sector)
spin_unlock_irqrestore(&mdev->al_lock, flags);
}
#if (PAGE_SHIFT + 3) < (AL_EXTENT_SHIFT - BM_BLOCK_SHIFT)
/* 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.
*/
# error FIXME
#endif
static unsigned int al_extent_to_bm_page(unsigned int al_enr)
{
return al_enr >>
/* bit to page */
((PAGE_SHIFT + 3) -
/* al extent number to bit */
(AL_EXTENT_SHIFT - BM_BLOCK_SHIFT));
}
static unsigned int rs_extent_to_bm_page(unsigned int rs_enr)
{
return rs_enr >>
/* bit to page */
((PAGE_SHIFT + 3) -
/* al extent number to bit */
(BM_EXT_SHIFT - BM_BLOCK_SHIFT));
}
int
w_al_write_transaction(struct drbd_conf *mdev, struct drbd_work *w, int unused)
{
@ -285,7 +316,7 @@ w_al_write_transaction(struct drbd_conf *mdev, struct drbd_work *w, int unused)
* For now, we must not write the transaction,
* if we cannot write out the bitmap of the evicted extent. */
if (mdev->state.conn < C_CONNECTED && evicted != LC_FREE)
drbd_bm_write_sect(mdev, evicted/AL_EXT_PER_BM_SECT);
drbd_bm_write_page(mdev, al_extent_to_bm_page(evicted));
/* The bitmap write may have failed, causing a state change. */
if (mdev->state.disk < D_INCONSISTENT) {
@ -334,7 +365,7 @@ w_al_write_transaction(struct drbd_conf *mdev, struct drbd_work *w, int unused)
+ mdev->ldev->md.al_offset + mdev->al_tr_pos;
if (!drbd_md_sync_page_io(mdev, mdev->ldev, sector, WRITE))
drbd_chk_io_error(mdev, 1, TRUE);
drbd_chk_io_error(mdev, 1, true);
if (++mdev->al_tr_pos >
div_ceil(mdev->act_log->nr_elements, AL_EXTENTS_PT))
@ -511,225 +542,6 @@ cancel:
return 1;
}
static void atodb_endio(struct bio *bio, int error)
{
struct drbd_atodb_wait *wc = bio->bi_private;
struct drbd_conf *mdev = wc->mdev;
struct page *page;
int uptodate = bio_flagged(bio, BIO_UPTODATE);
/* strange behavior of some lower level drivers...
* fail the request by clearing the uptodate flag,
* but do not return any error?! */
if (!error && !uptodate)
error = -EIO;
drbd_chk_io_error(mdev, error, TRUE);
if (error && wc->error == 0)
wc->error = error;
if (atomic_dec_and_test(&wc->count))
complete(&wc->io_done);
page = bio->bi_io_vec[0].bv_page;
put_page(page);
bio_put(bio);
mdev->bm_writ_cnt++;
put_ldev(mdev);
}
/* sector to word */
#define S2W(s) ((s)<<(BM_EXT_SHIFT-BM_BLOCK_SHIFT-LN2_BPL))
/* activity log to on disk bitmap -- prepare bio unless that sector
* is already covered by previously prepared bios */
static int atodb_prepare_unless_covered(struct drbd_conf *mdev,
struct bio **bios,
unsigned int enr,
struct drbd_atodb_wait *wc) __must_hold(local)
{
struct bio *bio;
struct page *page;
sector_t on_disk_sector;
unsigned int page_offset = PAGE_SIZE;
int offset;
int i = 0;
int err = -ENOMEM;
/* We always write aligned, full 4k blocks,
* so we can ignore the logical_block_size (for now) */
enr &= ~7U;
on_disk_sector = enr + mdev->ldev->md.md_offset
+ mdev->ldev->md.bm_offset;
D_ASSERT(!(on_disk_sector & 7U));
/* Check if that enr is already covered by an already created bio.
* Caution, bios[] is not NULL terminated,
* but only initialized to all NULL.
* For completely scattered activity log,
* the last invocation iterates over all bios,
* and finds the last NULL entry.
*/
while ((bio = bios[i])) {
if (bio->bi_sector == on_disk_sector)
return 0;
i++;
}
/* bios[i] == NULL, the next not yet used slot */
/* GFP_KERNEL, we are not in the write-out path */
bio = bio_alloc(GFP_KERNEL, 1);
if (bio == NULL)
return -ENOMEM;
if (i > 0) {
const struct bio_vec *prev_bv = bios[i-1]->bi_io_vec;
page_offset = prev_bv->bv_offset + prev_bv->bv_len;
page = prev_bv->bv_page;
}
if (page_offset == PAGE_SIZE) {
page = alloc_page(__GFP_HIGHMEM);
if (page == NULL)
goto out_bio_put;
page_offset = 0;
} else {
get_page(page);
}
offset = S2W(enr);
drbd_bm_get_lel(mdev, offset,
min_t(size_t, S2W(8), drbd_bm_words(mdev) - offset),
kmap(page) + page_offset);
kunmap(page);
bio->bi_private = wc;
bio->bi_end_io = atodb_endio;
bio->bi_bdev = mdev->ldev->md_bdev;
bio->bi_sector = on_disk_sector;
if (bio_add_page(bio, page, 4096, page_offset) != 4096)
goto out_put_page;
atomic_inc(&wc->count);
/* we already know that we may do this...
* get_ldev_if_state(mdev,D_ATTACHING);
* just get the extra reference, so that the local_cnt reflects
* the number of pending IO requests DRBD at its backing device.
*/
atomic_inc(&mdev->local_cnt);
bios[i] = bio;
return 0;
out_put_page:
err = -EINVAL;
put_page(page);
out_bio_put:
bio_put(bio);
return err;
}
/**
* drbd_al_to_on_disk_bm() - * Writes bitmap parts covered by active AL extents
* @mdev: DRBD device.
*
* Called when we detach (unconfigure) local storage,
* or when we go from R_PRIMARY to R_SECONDARY role.
*/
void drbd_al_to_on_disk_bm(struct drbd_conf *mdev)
{
int i, nr_elements;
unsigned int enr;
struct bio **bios;
struct drbd_atodb_wait wc;
ERR_IF (!get_ldev_if_state(mdev, D_ATTACHING))
return; /* sorry, I don't have any act_log etc... */
wait_event(mdev->al_wait, lc_try_lock(mdev->act_log));
nr_elements = mdev->act_log->nr_elements;
/* GFP_KERNEL, we are not in anyone's write-out path */
bios = kzalloc(sizeof(struct bio *) * nr_elements, GFP_KERNEL);
if (!bios)
goto submit_one_by_one;
atomic_set(&wc.count, 0);
init_completion(&wc.io_done);
wc.mdev = mdev;
wc.error = 0;
for (i = 0; i < nr_elements; i++) {
enr = lc_element_by_index(mdev->act_log, i)->lc_number;
if (enr == LC_FREE)
continue;
/* next statement also does atomic_inc wc.count and local_cnt */
if (atodb_prepare_unless_covered(mdev, bios,
enr/AL_EXT_PER_BM_SECT,
&wc))
goto free_bios_submit_one_by_one;
}
/* unnecessary optimization? */
lc_unlock(mdev->act_log);
wake_up(&mdev->al_wait);
/* all prepared, submit them */
for (i = 0; i < nr_elements; i++) {
if (bios[i] == NULL)
break;
if (FAULT_ACTIVE(mdev, DRBD_FAULT_MD_WR)) {
bios[i]->bi_rw = WRITE;
bio_endio(bios[i], -EIO);
} else {
submit_bio(WRITE, bios[i]);
}
}
/* always (try to) flush bitmap to stable storage */
drbd_md_flush(mdev);
/* In case we did not submit a single IO do not wait for
* them to complete. ( Because we would wait forever here. )
*
* In case we had IOs and they are already complete, there
* is not point in waiting anyways.
* Therefore this if () ... */
if (atomic_read(&wc.count))
wait_for_completion(&wc.io_done);
put_ldev(mdev);
kfree(bios);
return;
free_bios_submit_one_by_one:
/* free everything by calling the endio callback directly. */
for (i = 0; i < nr_elements && bios[i]; i++)
bio_endio(bios[i], 0);
kfree(bios);
submit_one_by_one:
dev_warn(DEV, "Using the slow drbd_al_to_on_disk_bm()\n");
for (i = 0; i < mdev->act_log->nr_elements; i++) {
enr = lc_element_by_index(mdev->act_log, i)->lc_number;
if (enr == LC_FREE)
continue;
/* Really slow: if we have al-extents 16..19 active,
* sector 4 will be written four times! Synchronous! */
drbd_bm_write_sect(mdev, enr/AL_EXT_PER_BM_SECT);
}
lc_unlock(mdev->act_log);
wake_up(&mdev->al_wait);
put_ldev(mdev);
}
/**
* drbd_al_apply_to_bm() - Sets the bitmap to diry(1) where covered ba active AL extents
* @mdev: DRBD device.
@ -809,7 +621,7 @@ static int w_update_odbm(struct drbd_conf *mdev, struct drbd_work *w, int unused
return 1;
}
drbd_bm_write_sect(mdev, udw->enr);
drbd_bm_write_page(mdev, rs_extent_to_bm_page(udw->enr));
put_ldev(mdev);
kfree(udw);
@ -889,7 +701,6 @@ static void drbd_try_clear_on_disk_bm(struct drbd_conf *mdev, sector_t sector,
dev_warn(DEV, "Kicking resync_lru element enr=%u "
"out with rs_failed=%d\n",
ext->lce.lc_number, ext->rs_failed);
set_bit(WRITE_BM_AFTER_RESYNC, &mdev->flags);
}
ext->rs_left = rs_left;
ext->rs_failed = success ? 0 : count;
@ -908,7 +719,6 @@ static void drbd_try_clear_on_disk_bm(struct drbd_conf *mdev, sector_t sector,
drbd_queue_work_front(&mdev->data.work, &udw->w);
} else {
dev_warn(DEV, "Could not kmalloc an udw\n");
set_bit(WRITE_BM_AFTER_RESYNC, &mdev->flags);
}
}
} else {
@ -919,6 +729,22 @@ static void drbd_try_clear_on_disk_bm(struct drbd_conf *mdev, sector_t sector,
}
}
void drbd_advance_rs_marks(struct drbd_conf *mdev, unsigned long still_to_go)
{
unsigned long now = jiffies;
unsigned long last = mdev->rs_mark_time[mdev->rs_last_mark];
int next = (mdev->rs_last_mark + 1) % DRBD_SYNC_MARKS;
if (time_after_eq(now, last + DRBD_SYNC_MARK_STEP)) {
if (mdev->rs_mark_left[mdev->rs_last_mark] != still_to_go &&
mdev->state.conn != C_PAUSED_SYNC_T &&
mdev->state.conn != C_PAUSED_SYNC_S) {
mdev->rs_mark_time[next] = now;
mdev->rs_mark_left[next] = still_to_go;
mdev->rs_last_mark = next;
}
}
}
/* clear the bit corresponding to the piece of storage in question:
* size byte of data starting from sector. Only clear a bits of the affected
* one ore more _aligned_ BM_BLOCK_SIZE blocks.
@ -936,7 +762,7 @@ void __drbd_set_in_sync(struct drbd_conf *mdev, sector_t sector, int size,
int wake_up = 0;
unsigned long flags;
if (size <= 0 || (size & 0x1ff) != 0 || size > DRBD_MAX_SEGMENT_SIZE) {
if (size <= 0 || (size & 0x1ff) != 0 || size > DRBD_MAX_BIO_SIZE) {
dev_err(DEV, "drbd_set_in_sync: sector=%llus size=%d nonsense!\n",
(unsigned long long)sector, size);
return;
@ -969,21 +795,9 @@ void __drbd_set_in_sync(struct drbd_conf *mdev, sector_t sector, int size,
*/
count = drbd_bm_clear_bits(mdev, sbnr, ebnr);
if (count && get_ldev(mdev)) {
unsigned long now = jiffies;
unsigned long last = mdev->rs_mark_time[mdev->rs_last_mark];
int next = (mdev->rs_last_mark + 1) % DRBD_SYNC_MARKS;
if (time_after_eq(now, last + DRBD_SYNC_MARK_STEP)) {
unsigned long tw = drbd_bm_total_weight(mdev);
if (mdev->rs_mark_left[mdev->rs_last_mark] != tw &&
mdev->state.conn != C_PAUSED_SYNC_T &&
mdev->state.conn != C_PAUSED_SYNC_S) {
mdev->rs_mark_time[next] = now;
mdev->rs_mark_left[next] = tw;
mdev->rs_last_mark = next;
}
}
drbd_advance_rs_marks(mdev, drbd_bm_total_weight(mdev));
spin_lock_irqsave(&mdev->al_lock, flags);
drbd_try_clear_on_disk_bm(mdev, sector, count, TRUE);
drbd_try_clear_on_disk_bm(mdev, sector, count, true);
spin_unlock_irqrestore(&mdev->al_lock, flags);
/* just wake_up unconditional now, various lc_chaged(),
@ -998,27 +812,27 @@ void __drbd_set_in_sync(struct drbd_conf *mdev, sector_t sector, int size,
/*
* this is intended to set one request worth of data out of sync.
* affects at least 1 bit,
* and at most 1+DRBD_MAX_SEGMENT_SIZE/BM_BLOCK_SIZE bits.
* and at most 1+DRBD_MAX_BIO_SIZE/BM_BLOCK_SIZE bits.
*
* called by tl_clear and drbd_send_dblock (==drbd_make_request).
* so this can be _any_ process.
*/
void __drbd_set_out_of_sync(struct drbd_conf *mdev, sector_t sector, int size,
int __drbd_set_out_of_sync(struct drbd_conf *mdev, sector_t sector, int size,
const char *file, const unsigned int line)
{
unsigned long sbnr, ebnr, lbnr, flags;
sector_t esector, nr_sectors;
unsigned int enr, count;
unsigned int enr, count = 0;
struct lc_element *e;
if (size <= 0 || (size & 0x1ff) != 0 || size > DRBD_MAX_SEGMENT_SIZE) {
if (size <= 0 || (size & 0x1ff) != 0 || size > DRBD_MAX_BIO_SIZE) {
dev_err(DEV, "sector: %llus, size: %d\n",
(unsigned long long)sector, size);
return;
return 0;
}
if (!get_ldev(mdev))
return; /* no disk, no metadata, no bitmap to set bits in */
return 0; /* no disk, no metadata, no bitmap to set bits in */
nr_sectors = drbd_get_capacity(mdev->this_bdev);
esector = sector + (size >> 9) - 1;
@ -1048,6 +862,8 @@ void __drbd_set_out_of_sync(struct drbd_conf *mdev, sector_t sector, int size,
out:
put_ldev(mdev);
return count;
}
static
@ -1128,7 +944,10 @@ int drbd_rs_begin_io(struct drbd_conf *mdev, sector_t sector)
unsigned int enr = BM_SECT_TO_EXT(sector);
struct bm_extent *bm_ext;
int i, sig;
int sa = 200; /* Step aside 200 times, then grab the extent and let app-IO wait.
200 times -> 20 seconds. */
retry:
sig = wait_event_interruptible(mdev->al_wait,
(bm_ext = _bme_get(mdev, enr)));
if (sig)
@ -1139,16 +958,25 @@ int drbd_rs_begin_io(struct drbd_conf *mdev, sector_t sector)
for (i = 0; i < AL_EXT_PER_BM_SECT; i++) {
sig = wait_event_interruptible(mdev->al_wait,
!_is_in_al(mdev, enr * AL_EXT_PER_BM_SECT + i));
if (sig) {
!_is_in_al(mdev, enr * AL_EXT_PER_BM_SECT + i) ||
test_bit(BME_PRIORITY, &bm_ext->flags));
if (sig || (test_bit(BME_PRIORITY, &bm_ext->flags) && sa)) {
spin_lock_irq(&mdev->al_lock);
if (lc_put(mdev->resync, &bm_ext->lce) == 0) {
clear_bit(BME_NO_WRITES, &bm_ext->flags);
bm_ext->flags = 0; /* clears BME_NO_WRITES and eventually BME_PRIORITY */
mdev->resync_locked--;
wake_up(&mdev->al_wait);
}
spin_unlock_irq(&mdev->al_lock);
return -EINTR;
if (sig)
return -EINTR;
if (schedule_timeout_interruptible(HZ/10))
return -EINTR;
if (sa && --sa == 0)
dev_warn(DEV,"drbd_rs_begin_io() stepped aside for 20sec."
"Resync stalled?\n");
goto retry;
}
}
set_bit(BME_LOCKED, &bm_ext->flags);
@ -1291,8 +1119,7 @@ void drbd_rs_complete_io(struct drbd_conf *mdev, sector_t sector)
}
if (lc_put(mdev->resync, &bm_ext->lce) == 0) {
clear_bit(BME_LOCKED, &bm_ext->flags);
clear_bit(BME_NO_WRITES, &bm_ext->flags);
bm_ext->flags = 0; /* clear BME_LOCKED, BME_NO_WRITES and BME_PRIORITY */
mdev->resync_locked--;
wake_up(&mdev->al_wait);
}
@ -1383,7 +1210,7 @@ void drbd_rs_failed_io(struct drbd_conf *mdev, sector_t sector, int size)
sector_t esector, nr_sectors;
int wake_up = 0;
if (size <= 0 || (size & 0x1ff) != 0 || size > DRBD_MAX_SEGMENT_SIZE) {
if (size <= 0 || (size & 0x1ff) != 0 || size > DRBD_MAX_BIO_SIZE) {
dev_err(DEV, "drbd_rs_failed_io: sector=%llus size=%d nonsense!\n",
(unsigned long long)sector, size);
return;
@ -1420,7 +1247,7 @@ void drbd_rs_failed_io(struct drbd_conf *mdev, sector_t sector, int size)
mdev->rs_failed += count;
if (get_ldev(mdev)) {
drbd_try_clear_on_disk_bm(mdev, sector, count, FALSE);
drbd_try_clear_on_disk_bm(mdev, sector, count, false);
put_ldev(mdev);
}

756
drivers/block/drbd/drbd_bitmap.c
View File

File diff suppressed because it is too large Load Diff

270
drivers/block/drbd/drbd_int.h
View File

@ -72,13 +72,6 @@ extern int fault_devs;
extern char usermode_helper[];
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
/* I don't remember why XCPU ...
* This is used to wake the asender,
* and to interrupt sending the sending task
@ -104,6 +97,7 @@ extern char usermode_helper[];
#define ID_SYNCER (-1ULL)
#define ID_VACANT 0
#define is_syncer_block_id(id) ((id) == ID_SYNCER)
#define UUID_NEW_BM_OFFSET ((u64)0x0001000000000000ULL)
struct drbd_conf;
@ -137,20 +131,19 @@ enum {
DRBD_FAULT_MAX,
};
#ifdef CONFIG_DRBD_FAULT_INJECTION
extern unsigned int
_drbd_insert_fault(struct drbd_conf *mdev, unsigned int type);
static inline int
drbd_insert_fault(struct drbd_conf *mdev, unsigned int type) {
#ifdef CONFIG_DRBD_FAULT_INJECTION
return fault_rate &&
(enable_faults & (1<<type)) &&
_drbd_insert_fault(mdev, type);
}
#define FAULT_ACTIVE(_m, _t) (drbd_insert_fault((_m), (_t)))
#else
#define FAULT_ACTIVE(_m, _t) (0)
return 0;
#endif
}
/* integer division, round _UP_ to the next integer */
#define div_ceil(A, B) ((A)/(B) + ((A)%(B) ? 1 : 0))
@ -212,8 +205,10 @@ enum drbd_packets {
/* P_CKPT_FENCE_REQ = 0x25, * currently reserved for protocol D */
/* P_CKPT_DISABLE_REQ = 0x26, * currently reserved for protocol D */
P_DELAY_PROBE = 0x27, /* is used on BOTH sockets */
P_OUT_OF_SYNC = 0x28, /* Mark as out of sync (Outrunning), data socket */
P_RS_CANCEL = 0x29, /* meta: Used to cancel RS_DATA_REQUEST packet by SyncSource */
P_MAX_CMD = 0x28,
P_MAX_CMD = 0x2A,
P_MAY_IGNORE = 0x100, /* Flag to test if (cmd > P_MAY_IGNORE) ... */
P_MAX_OPT_CMD = 0x101,
@ -269,6 +264,7 @@ static inline const char *cmdname(enum drbd_packets cmd)
[P_RS_IS_IN_SYNC] = "CsumRSIsInSync",
[P_COMPRESSED_BITMAP] = "CBitmap",
[P_DELAY_PROBE] = "DelayProbe",
[P_OUT_OF_SYNC] = "OutOfSync",
[P_MAX_CMD] = NULL,
};
@ -512,7 +508,7 @@ struct p_sizes {
u64 d_size; /* size of disk */
u64 u_size; /* user requested size */
u64 c_size; /* current exported size */
u32 max_segment_size; /* Maximal size of a BIO */
u32 max_bio_size; /* Maximal size of a BIO */
u16 queue_order_type; /* not yet implemented in DRBD*/
u16 dds_flags; /* use enum dds_flags here. */
} __packed;
@ -550,6 +546,13 @@ struct p_discard {
u32 pad;
} __packed;
struct p_block_desc {
struct p_header80 head;
u64 sector;
u32 blksize;
u32 pad; /* to multiple of 8 Byte */
} __packed;
/* Valid values for the encoding field.
* Bump proto version when changing this. */
enum drbd_bitmap_code {
@ -647,6 +650,7 @@ union p_polymorph {
struct p_block_req block_req;
struct p_delay_probe93 delay_probe93;
struct p_rs_uuid rs_uuid;
struct p_block_desc block_desc;
} __packed;
/**********************************************************************/
@ -677,13 +681,6 @@ static inline enum drbd_thread_state get_t_state(struct drbd_thread *thi)
return thi->t_state;
}
/*
* Having this as the first member of a struct provides sort of "inheritance".
* "derived" structs can be "drbd_queue_work()"ed.
* The callback should know and cast back to the descendant struct.
* drbd_request and drbd_epoch_entry are descendants of drbd_work.
*/
struct drbd_work;
typedef int (*drbd_work_cb)(struct drbd_conf *, struct drbd_work *, int cancel);
struct drbd_work {
@ -712,9 +709,6 @@ struct drbd_request {
* starting a new epoch...
*/
/* up to here, the struct layout is identical to drbd_epoch_entry;
* we might be able to use that to our advantage... */
struct list_head tl_requests; /* ring list in the transfer log */
struct bio *master_bio; /* master bio pointer */
unsigned long rq_state; /* see comments above _req_mod() */
@ -831,7 +825,7 @@ enum {
CRASHED_PRIMARY, /* This node was a crashed primary.
* Gets cleared when the state.conn
* goes into C_CONNECTED state. */
WRITE_BM_AFTER_RESYNC, /* A kmalloc() during resync failed */
NO_BARRIER_SUPP, /* underlying block device doesn't implement barriers */
CONSIDER_RESYNC,
MD_NO_FUA, /* Users wants us to not use FUA/FLUSH on meta data dev */
@ -856,10 +850,37 @@ enum {
GOT_PING_ACK, /* set when we receive a ping_ack packet, misc wait gets woken */
NEW_CUR_UUID, /* Create new current UUID when thawing IO */
AL_SUSPENDED, /* Activity logging is currently suspended. */
AHEAD_TO_SYNC_SOURCE, /* Ahead -> SyncSource queued */
};
struct drbd_bitmap; /* opaque for drbd_conf */
/* definition of bits in bm_flags to be used in drbd_bm_lock
* and drbd_bitmap_io and friends. */
enum bm_flag {
/* do we need to kfree, or vfree bm_pages? */
BM_P_VMALLOCED = 0x10000, /* internal use only, will be masked out */
/* currently locked for bulk operation */
BM_LOCKED_MASK = 0x7,
/* in detail, that is: */
BM_DONT_CLEAR = 0x1,
BM_DONT_SET = 0x2,
BM_DONT_TEST = 0x4,
/* (test bit, count bit) allowed (common case) */
BM_LOCKED_TEST_ALLOWED = 0x3,
/* testing bits, as well as setting new bits allowed, but clearing bits
* would be unexpected. Used during bitmap receive. Setting new bits
* requires sending of "out-of-sync" information, though. */
BM_LOCKED_SET_ALLOWED = 0x1,
/* clear is not expected while bitmap is locked for bulk operation */
};
/* TODO sort members for performance
* MAYBE group them further */
@ -925,6 +946,7 @@ struct drbd_md_io {
struct bm_io_work {
struct drbd_work w;
char *why;
enum bm_flag flags;
int (*io_fn)(struct drbd_conf *mdev);
void (*done)(struct drbd_conf *mdev, int rv);
};
@ -963,9 +985,12 @@ struct drbd_conf {
struct drbd_work resync_work,
unplug_work,
go_diskless,
md_sync_work;
md_sync_work,
start_resync_work;
struct timer_list resync_timer;
struct timer_list md_sync_timer;
struct timer_list start_resync_timer;
struct timer_list request_timer;
#ifdef DRBD_DEBUG_MD_SYNC
struct {
unsigned int line;
@ -1000,9 +1025,9 @@ struct drbd_conf {
struct hlist_head *tl_hash;
unsigned int tl_hash_s;
/* blocks to sync in this run [unit BM_BLOCK_SIZE] */
/* blocks to resync in this run [unit BM_BLOCK_SIZE] */
unsigned long rs_total;
/* number of sync IOs that failed in this run */
/* number of resync blocks that failed in this run */
unsigned long rs_failed;
/* Syncer's start time [unit jiffies] */
unsigned long rs_start;
@ -1102,6 +1127,7 @@ struct drbd_conf {
struct fifo_buffer rs_plan_s; /* correction values of resync planer */
int rs_in_flight; /* resync sectors in flight (to proxy, in proxy and from proxy) */
int rs_planed; /* resync sectors already planed */
atomic_t ap_in_flight; /* App sectors in flight (waiting for ack) */
};
static inline struct drbd_conf *minor_to_mdev(unsigned int minor)
@ -1163,14 +1189,19 @@ enum dds_flags {
};
extern void drbd_init_set_defaults(struct drbd_conf *mdev);
extern int drbd_change_state(struct drbd_conf *mdev, enum chg_state_flags f,
union drbd_state mask, union drbd_state val);
extern enum drbd_state_rv drbd_change_state(struct drbd_conf *mdev,
enum chg_state_flags f,
union drbd_state mask,
union drbd_state val);
extern void drbd_force_state(struct drbd_conf *, union drbd_state,
union drbd_state);
extern int _drbd_request_state(struct drbd_conf *, union drbd_state,
union drbd_state, enum chg_state_flags);
extern int __drbd_set_state(struct drbd_conf *, union drbd_state,
enum chg_state_flags, struct completion *done);
extern enum drbd_state_rv _drbd_request_state(struct drbd_conf *,
union drbd_state,
union drbd_state,
enum chg_state_flags);
extern enum drbd_state_rv __drbd_set_state(struct drbd_conf *, union drbd_state,
enum chg_state_flags,
struct completion *done);
extern void print_st_err(struct drbd_conf *, union drbd_state,
union drbd_state, int);
extern int drbd_thread_start(struct drbd_thread *thi);
@ -1195,7 +1226,7 @@ extern int drbd_send(struct drbd_conf *mdev, struct socket *sock,
extern int drbd_send_protocol(struct drbd_conf *mdev);
extern int drbd_send_uuids(struct drbd_conf *mdev);
extern int drbd_send_uuids_skip_initial_sync(struct drbd_conf *mdev);
extern int drbd_send_sync_uuid(struct drbd_conf *mdev, u64 val);
extern int drbd_gen_and_send_sync_uuid(struct drbd_conf *mdev);
extern int drbd_send_sizes(struct drbd_conf *mdev, int trigger_reply, enum dds_flags flags);
extern int _drbd_send_state(struct drbd_conf *mdev);
extern int drbd_send_state(struct drbd_conf *mdev);
@ -1220,11 +1251,10 @@ extern int drbd_send_ack_dp(struct drbd_conf *mdev, enum drbd_packets cmd,
struct p_data *dp, int data_size);
extern int drbd_send_ack_ex(struct drbd_conf *mdev, enum drbd_packets cmd,
sector_t sector, int blksize, u64 block_id);
extern int drbd_send_oos(struct drbd_conf *mdev, struct drbd_request *req);
extern int drbd_send_block(struct drbd_conf *mdev, enum drbd_packets cmd,
struct drbd_epoch_entry *e);
extern int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req);
extern int _drbd_send_barrier(struct drbd_conf *mdev,
struct drbd_tl_epoch *barrier);
extern int drbd_send_drequest(struct drbd_conf *mdev, int cmd,
sector_t sector, int size, u64 block_id);
extern int drbd_send_drequest_csum(struct drbd_conf *mdev,
@ -1235,14 +1265,13 @@ extern int drbd_send_ov_request(struct drbd_conf *mdev,sector_t sector,int size)
extern int drbd_send_bitmap(struct drbd_conf *mdev);
extern int _drbd_send_bitmap(struct drbd_conf *mdev);
extern int drbd_send_sr_reply(struct drbd_conf *mdev, int retcode);
extern int drbd_send_sr_reply(struct drbd_conf *mdev, enum drbd_state_rv retcode);
extern void drbd_free_bc(struct drbd_backing_dev *ldev);
extern void drbd_mdev_cleanup(struct drbd_conf *mdev);
void drbd_print_uuids(struct drbd_conf *mdev, const char *text);
/* drbd_meta-data.c (still in drbd_main.c) */
extern void drbd_md_sync(struct drbd_conf *mdev);
extern int drbd_md_read(struct drbd_conf *mdev, struct drbd_backing_dev *bdev);
/* maybe define them below as inline? */
extern void drbd_uuid_set(struct drbd_conf *mdev, int idx, u64 val) __must_hold(local);
extern void _drbd_uuid_set(struct drbd_conf *mdev, int idx, u64 val) __must_hold(local);
extern void drbd_uuid_new_current(struct drbd_conf *mdev) __must_hold(local);
@ -1261,10 +1290,12 @@ extern void drbd_md_mark_dirty_(struct drbd_conf *mdev,
extern void drbd_queue_bitmap_io(struct drbd_conf *mdev,
int (*io_fn)(struct drbd_conf *),
void (*done)(struct drbd_conf *, int),
char *why);
char *why, enum bm_flag flags);
extern int drbd_bitmap_io(struct drbd_conf *mdev,
int (*io_fn)(struct drbd_conf *),
char *why, enum bm_flag flags);
extern int drbd_bmio_set_n_write(struct drbd_conf *mdev);
extern int drbd_bmio_clear_n_write(struct drbd_conf *mdev);
extern int drbd_bitmap_io(struct drbd_conf *mdev, int (*io_fn)(struct drbd_conf *), char *why);
extern void drbd_go_diskless(struct drbd_conf *mdev);
extern void drbd_ldev_destroy(struct drbd_conf *mdev);
@ -1313,6 +1344,7 @@ struct bm_extent {
#define BME_NO_WRITES 0 /* bm_extent.flags: no more requests on this one! */
#define BME_LOCKED 1 /* bm_extent.flags: syncer active on this one. */
#define BME_PRIORITY 2 /* finish resync IO on this extent ASAP! App IO waiting! */
/* drbd_bitmap.c */
/*
@ -1390,7 +1422,9 @@ struct bm_extent {
* you should use 64bit OS for that much storage, anyways. */
#define DRBD_MAX_SECTORS_FLEX BM_BIT_TO_SECT(0xffff7fff)
#else
#define DRBD_MAX_SECTORS_FLEX BM_BIT_TO_SECT(0x1LU << 32)
/* we allow up to 1 PiB now on 64bit architecture with "flexible" meta data */
#define DRBD_MAX_SECTORS_FLEX (1UL << 51)
/* corresponds to (1UL << 38) bits right now. */
#endif
#endif
@ -1398,7 +1432,7 @@ struct bm_extent {
* With a value of 8 all IO in one 128K block make it to the same slot of the
* hash table. */
#define HT_SHIFT 8
#define DRBD_MAX_SEGMENT_SIZE (1U<<(9+HT_SHIFT))
#define DRBD_MAX_BIO_SIZE (1U<<(9+HT_SHIFT))
#define DRBD_MAX_SIZE_H80_PACKET (1 << 15) /* The old header only allows packets up to 32Kib data */
@ -1410,16 +1444,20 @@ extern int drbd_bm_resize(struct drbd_conf *mdev, sector_t sectors, int set_new
extern void drbd_bm_cleanup(struct drbd_conf *mdev);
extern void drbd_bm_set_all(struct drbd_conf *mdev);
extern void drbd_bm_clear_all(struct drbd_conf *mdev);
/* set/clear/test only a few bits at a time */
extern int drbd_bm_set_bits(
struct drbd_conf *mdev, unsigned long s, unsigned long e);
extern int drbd_bm_clear_bits(
struct drbd_conf *mdev, unsigned long s, unsigned long e);
/* bm_set_bits variant for use while holding drbd_bm_lock */
extern int drbd_bm_count_bits(
struct drbd_conf *mdev, const unsigned long s, const unsigned long e);
/* bm_set_bits variant for use while holding drbd_bm_lock,
* may process the whole bitmap in one go */
extern void _drbd_bm_set_bits(struct drbd_conf *mdev,
const unsigned long s, const unsigned long e);
extern int drbd_bm_test_bit(struct drbd_conf *mdev, unsigned long bitnr);
extern int drbd_bm_e_weight(struct drbd_conf *mdev, unsigned long enr);
extern int drbd_bm_write_sect(struct drbd_conf *mdev, unsigned long enr) __must_hold(local);
extern int drbd_bm_write_page(struct drbd_conf *mdev, unsigned int idx) __must_hold(local);
extern int drbd_bm_read(struct drbd_conf *mdev) __must_hold(local);
extern int drbd_bm_write(struct drbd_conf *mdev) __must_hold(local);
extern unsigned long drbd_bm_ALe_set_all(struct drbd_conf *mdev,
@ -1427,6 +1465,8 @@ extern unsigned long drbd_bm_ALe_set_all(struct drbd_conf *mdev,
extern size_t drbd_bm_words(struct drbd_conf *mdev);
extern unsigned long drbd_bm_bits(struct drbd_conf *mdev);
extern sector_t drbd_bm_capacity(struct drbd_conf *mdev);
#define DRBD_END_OF_BITMAP (~(unsigned long)0)
extern unsigned long drbd_bm_find_next(struct drbd_conf *mdev, unsigned long bm_fo);
/* bm_find_next variants for use while you hold drbd_bm_lock() */
extern unsigned long _drbd_bm_find_next(struct drbd_conf *mdev, unsigned long bm_fo);
@ -1437,14 +1477,12 @@ extern int drbd_bm_rs_done(struct drbd_conf *mdev);
/* for receive_bitmap */
extern void drbd_bm_merge_lel(struct drbd_conf *mdev, size_t offset,
size_t number, unsigned long *buffer);
/* for _drbd_send_bitmap and drbd_bm_write_sect */
/* for _drbd_send_bitmap */
extern void drbd_bm_get_lel(struct drbd_conf *mdev, size_t offset,
size_t number, unsigned long *buffer);
extern void drbd_bm_lock(struct drbd_conf *mdev, char *why);
extern void drbd_bm_lock(struct drbd_conf *mdev, char *why, enum bm_flag flags);
extern void drbd_bm_unlock(struct drbd_conf *mdev);
extern int drbd_bm_count_bits(struct drbd_conf *mdev, const unsigned long s, const unsigned long e);
/* drbd_main.c */
extern struct kmem_cache *drbd_request_cache;
@ -1467,7 +1505,7 @@ extern void drbd_free_mdev(struct drbd_conf *mdev);
extern int proc_details;
/* drbd_req */
extern int drbd_make_request_26(struct request_queue *q, struct bio *bio);
extern int drbd_make_request(struct request_queue *q, struct bio *bio);
extern int drbd_read_remote(struct drbd_conf *mdev, struct drbd_request *req);
extern int drbd_merge_bvec(struct request_queue *q, struct bvec_merge_data *bvm, struct bio_vec *bvec);
extern int is_valid_ar_handle(struct drbd_request *, sector_t);
@ -1482,8 +1520,9 @@ enum determine_dev_size { dev_size_error = -1, unchanged = 0, shrunk = 1, grew =
extern enum determine_dev_size drbd_determin_dev_size(struct drbd_conf *, enum dds_flags) __must_hold(local);
extern void resync_after_online_grow(struct drbd_conf *);
extern void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int) __must_hold(local);
extern int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role,
int force);
extern enum drbd_state_rv drbd_set_role(struct drbd_conf *mdev,
enum drbd_role new_role,
int force);
extern enum drbd_disk_state drbd_try_outdate_peer(struct drbd_conf *mdev);
extern void drbd_try_outdate_peer_async(struct drbd_conf *mdev);
extern int drbd_khelper(struct drbd_conf *mdev, char *cmd);
@ -1499,6 +1538,7 @@ extern int drbd_resync_finished(struct drbd_conf *mdev);
extern int drbd_md_sync_page_io(struct drbd_conf *mdev,
struct drbd_backing_dev *bdev, sector_t sector, int rw);
extern void drbd_ov_oos_found(struct drbd_conf*, sector_t, int);
extern void drbd_rs_controller_reset(struct drbd_conf *mdev);
static inline void ov_oos_print(struct drbd_conf *mdev)
{
@ -1522,21 +1562,23 @@ extern int w_e_end_csum_rs_req(struct drbd_conf *, struct drbd_work *, int);
extern int w_e_end_ov_reply(struct drbd_conf *, struct drbd_work *, int);
extern int w_e_end_ov_req(struct drbd_conf *, struct drbd_work *, int);
extern int w_ov_finished(struct drbd_conf *, struct drbd_work *, int);
extern int w_resync_inactive(struct drbd_conf *, struct drbd_work *, int);
extern int w_resync_timer(struct drbd_conf *, struct drbd_work *, int);
extern int w_resume_next_sg(struct drbd_conf *, struct drbd_work *, int);
extern int w_send_write_hint(struct drbd_conf *, struct drbd_work *, int);
extern int w_make_resync_request(struct drbd_conf *, struct drbd_work *, int);
extern int w_send_dblock(struct drbd_conf *, struct drbd_work *, int);
extern int w_send_barrier(struct drbd_conf *, struct drbd_work *, int);
extern int w_send_read_req(struct drbd_conf *, struct drbd_work *, int);
extern int w_prev_work_done(struct drbd_conf *, struct drbd_work *, int);
extern int w_e_reissue(struct drbd_conf *, struct drbd_work *, int);
extern int w_restart_disk_io(struct drbd_conf *, struct drbd_work *, int);
extern int w_send_oos(struct drbd_conf *, struct drbd_work *, int);
extern int w_start_resync(struct drbd_conf *, struct drbd_work *, int);
extern void resync_timer_fn(unsigned long data);
extern void start_resync_timer_fn(unsigned long data);
/* drbd_receiver.c */
extern int drbd_rs_should_slow_down(struct drbd_conf *mdev);
extern int drbd_rs_should_slow_down(struct drbd_conf *mdev, sector_t sector);
extern int drbd_submit_ee(struct drbd_conf *mdev, struct drbd_epoch_entry *e,
const unsigned rw, const int fault_type);
extern int drbd_release_ee(struct drbd_conf *mdev, struct list_head *list);
@ -1619,16 +1661,16 @@ extern int drbd_rs_del_all(struct drbd_conf *mdev);
extern void drbd_rs_failed_io(struct drbd_conf *mdev,
sector_t sector, int size);
extern int drbd_al_read_log(struct drbd_conf *mdev, struct drbd_backing_dev *);
extern void drbd_advance_rs_marks(struct drbd_conf *mdev, unsigned long still_to_go);
extern void __drbd_set_in_sync(struct drbd_conf *mdev, sector_t sector,
int size, const char *file, const unsigned int line);
#define drbd_set_in_sync(mdev, sector, size) \
__drbd_set_in_sync(mdev, sector, size, __FILE__, __LINE__)
extern void __drbd_set_out_of_sync(struct drbd_conf *mdev, sector_t sector,
extern int __drbd_set_out_of_sync(struct drbd_conf *mdev, sector_t sector,
int size, const char *file, const unsigned int line);
#define drbd_set_out_of_sync(mdev, sector, size) \
__drbd_set_out_of_sync(mdev, sector, size, __FILE__, __LINE__)
extern void drbd_al_apply_to_bm(struct drbd_conf *mdev);
extern void drbd_al_to_on_disk_bm(struct drbd_conf *mdev);
extern void drbd_al_shrink(struct drbd_conf *mdev);
@ -1747,11 +1789,11 @@ static inline void drbd_state_unlock(struct drbd_conf *mdev)
wake_up(&mdev->misc_wait);
}
static inline int _drbd_set_state(struct drbd_conf *mdev,
union drbd_state ns, enum chg_state_flags flags,
struct completion *done)
static inline enum drbd_state_rv
_drbd_set_state(struct drbd_conf *mdev, union drbd_state ns,
enum chg_state_flags flags, struct completion *done)
{
int rv;
enum drbd_state_rv rv;
read_lock(&global_state_lock);
rv = __drbd_set_state(mdev, ns, flags, done);
@ -1982,17 +2024,17 @@ static inline int drbd_send_ping_ack(struct drbd_conf *mdev)
static inline void drbd_thread_stop(struct drbd_thread *thi)
{
_drbd_thread_stop(thi, FALSE, TRUE);
_drbd_thread_stop(thi, false, true);
}
static inline void drbd_thread_stop_nowait(struct drbd_thread *thi)
{
_drbd_thread_stop(thi, FALSE, FALSE);
_drbd_thread_stop(thi, false, false);
}
static inline void drbd_thread_restart_nowait(struct drbd_thread *thi)
{
_drbd_thread_stop(thi, TRUE, FALSE);
_drbd_thread_stop(thi, true, false);
}
/* counts how many answer packets packets we expect from our peer,
@ -2146,17 +2188,18 @@ extern int _get_ldev_if_state(struct drbd_conf *mdev, enum drbd_disk_state mins)
static inline void drbd_get_syncer_progress(struct drbd_conf *mdev,
unsigned long *bits_left, unsigned int *per_mil_done)
{
/*
* this is to break it at compile time when we change that
* (we may feel 4TB maximum storage per drbd is not enough)
*/
/* this is to break it at compile time when we change that, in case we
* want to support more than (1<<32) bits on a 32bit arch. */
typecheck(unsigned long, mdev->rs_total);
/* note: both rs_total and rs_left are in bits, i.e. in
* units of BM_BLOCK_SIZE.
* for the percentage, we don't care. */
*bits_left = drbd_bm_total_weight(mdev) - mdev->rs_failed;
if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T)
*bits_left = mdev->ov_left;
else
*bits_left = drbd_bm_total_weight(mdev) - mdev->rs_failed;
/* >> 10 to prevent overflow,
* +1 to prevent division by zero */
if (*bits_left > mdev->rs_total) {
@ -2171,10 +2214,19 @@ static inline void drbd_get_syncer_progress(struct drbd_conf *mdev,
*bits_left, mdev->rs_total, mdev->rs_failed);
*per_mil_done = 0;
} else {
/* make sure the calculation happens in long context */
unsigned long tmp = 1000UL -
(*bits_left >> 10)*1000UL
/ ((mdev->rs_total >> 10) + 1UL);
/* Make sure the division happens in long context.
* We allow up to one petabyte storage right now,
* at a granularity of 4k per bit that is 2**38 bits.
* After shift right and multiplication by 1000,
* this should still fit easily into a 32bit long,
* so we don't need a 64bit division on 32bit arch.
* Note: currently we don't support such large bitmaps on 32bit
* arch anyways, but no harm done to be prepared for it here.
*/
unsigned int shift = mdev->rs_total >= (1ULL << 32) ? 16 : 10;
unsigned long left = *bits_left >> shift;
unsigned long total = 1UL + (mdev->rs_total >> shift);
unsigned long tmp = 1000UL - left * 1000UL/total;
*per_mil_done = tmp;
}
}
@ -2193,8 +2245,9 @@ static inline int drbd_get_max_buffers(struct drbd_conf *mdev)
return mxb;
}
static inline int drbd_state_is_stable(union drbd_state s)
static inline int drbd_state_is_stable(struct drbd_conf *mdev)
{
union drbd_state s = mdev->state;
/* DO NOT add a default clause, we want the compiler to warn us
* for any newly introduced state we may have forgotten to add here */
@ -2211,11 +2264,9 @@ static inline int drbd_state_is_stable(union drbd_state s)
case C_VERIFY_T:
case C_PAUSED_SYNC_S:
case C_PAUSED_SYNC_T:
/* maybe stable, look at the disk state */
break;
/* no new io accepted during tansitional states
* like handshake or teardown */
case C_AHEAD:
case C_BEHIND:
/* transitional states, IO allowed */
case C_DISCONNECTING:
case C_UNCONNECTED:
case C_TIMEOUT:
@ -2226,7 +2277,15 @@ static inline int drbd_state_is_stable(union drbd_state s)
case C_WF_REPORT_PARAMS:
case C_STARTING_SYNC_S:
case C_STARTING_SYNC_T:
break;
/* Allow IO in BM exchange states with new protocols */
case C_WF_BITMAP_S:
if (mdev->agreed_pro_version < 96)
return 0;
break;
/* no new io accepted in these states */
case C_WF_BITMAP_T:
case C_WF_SYNC_UUID:
case C_MASK:
@ -2261,41 +2320,47 @@ static inline int is_susp(union drbd_state s)
return s.susp || s.susp_nod || s.susp_fen;
}
static inline int __inc_ap_bio_cond(struct drbd_conf *mdev)
static inline bool may_inc_ap_bio(struct drbd_conf *mdev)
{
int mxb = drbd_get_max_buffers(mdev);
if (is_susp(mdev->state))
return 0;
return false;
if (test_bit(SUSPEND_IO, &mdev->flags))
return 0;
return false;
/* to avoid potential deadlock or bitmap corruption,
* in various places, we only allow new application io
* to start during "stable" states. */
/* no new io accepted when attaching or detaching the disk */
if (!drbd_state_is_stable(mdev->state))
return 0;
if (!drbd_state_is_stable(mdev))
return false;
/* since some older kernels don't have atomic_add_unless,
* and we are within the spinlock anyways, we have this workaround. */
if (atomic_read(&mdev->ap_bio_cnt) > mxb)
return 0;
return false;
if (test_bit(BITMAP_IO, &mdev->flags))
return 0;
return 1;
return false;
return true;
}
static inline bool inc_ap_bio_cond(struct drbd_conf *mdev, int count)
{
bool rv = false;
spin_lock_irq(&mdev->req_lock);
rv = may_inc_ap_bio(mdev);
if (rv)
atomic_add(count, &mdev->ap_bio_cnt);
spin_unlock_irq(&mdev->req_lock);
return rv;
}
/* I'd like to use wait_event_lock_irq,
* but I'm not sure when it got introduced,
* and not sure when it has 3 or 4 arguments */
static inline void inc_ap_bio(struct drbd_conf *mdev, int count)
{
/* compare with after_state_ch,
* os.conn != C_WF_BITMAP_S && ns.conn == C_WF_BITMAP_S */
DEFINE_WAIT(wait);
/* we wait here
* as long as the device is suspended
* until the bitmap is no longer on the fly during connection
@ -2304,16 +2369,7 @@ static inline void inc_ap_bio(struct drbd_conf *mdev, int count)
* to avoid races with the reconnect code,
* we need to atomic_inc within the spinlock. */
spin_lock_irq(&mdev->req_lock);
while (!__inc_ap_bio_cond(mdev)) {
prepare_to_wait(&mdev->misc_wait, &wait, TASK_UNINTERRUPTIBLE);
spin_unlock_irq(&mdev->req_lock);
schedule();
finish_wait(&mdev->misc_wait, &wait);
spin_lock_irq(&mdev->req_lock);
}
atomic_add(count, &mdev->ap_bio_cnt);
spin_unlock_irq(&mdev->req_lock);
wait_event(mdev->misc_wait, inc_ap_bio_cond(mdev, count));
}
static inline void dec_ap_bio(struct drbd_conf *mdev)
@ -2333,9 +2389,11 @@ static inline void dec_ap_bio(struct drbd_conf *mdev)
}
}
static inline void drbd_set_ed_uuid(struct drbd_conf *mdev, u64 val)
static inline int drbd_set_ed_uuid(struct drbd_conf *mdev, u64 val)
{
int changed = mdev->ed_uuid != val;
mdev->ed_uuid = val;
return changed;
}
static inline int seq_cmp(u32 a, u32 b)

673
drivers/block/drbd/drbd_main.c
View File

File diff suppressed because it is too large Load Diff

183
drivers/block/drbd/drbd_nl.c
View File

@ -288,10 +288,11 @@ void drbd_try_outdate_peer_async(struct drbd_conf *mdev)
dev_err(DEV, "out of mem, failed to invoke fence-peer helper\n");
}
int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
enum drbd_state_rv
drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
{
const int max_tries = 4;
int r = 0;
enum drbd_state_rv rv = SS_UNKNOWN_ERROR;
int try = 0;
int forced = 0;
union drbd_state mask, val;
@ -306,17 +307,17 @@ int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
val.i = 0; val.role = new_role;
while (try++ < max_tries) {
r = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE);
rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE);
/* in case we first succeeded to outdate,
* but now suddenly could establish a connection */
if (r == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) {
if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) {
val.pdsk = 0;
mask.pdsk = 0;
continue;
}
if (r == SS_NO_UP_TO_DATE_DISK && force &&
if (rv == SS_NO_UP_TO_DATE_DISK && force &&
(mdev->state.disk < D_UP_TO_DATE &&
mdev->state.disk >= D_INCONSISTENT)) {
mask.disk = D_MASK;
@ -325,7 +326,7 @@ int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
continue;
}
if (r == SS_NO_UP_TO_DATE_DISK &&
if (rv == SS_NO_UP_TO_DATE_DISK &&
mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) {
D_ASSERT(mdev->state.pdsk == D_UNKNOWN);
nps = drbd_try_outdate_peer(mdev);
@ -341,9 +342,9 @@ int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
continue;
}
if (r == SS_NOTHING_TO_DO)
if (rv == SS_NOTHING_TO_DO)
goto fail;
if (r == SS_PRIMARY_NOP && mask.pdsk == 0) {
if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) {
nps = drbd_try_outdate_peer(mdev);
if (force && nps > D_OUTDATED) {
@ -356,25 +357,24 @@ int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
continue;
}
if (r == SS_TWO_PRIMARIES) {
if (rv == SS_TWO_PRIMARIES) {
/* Maybe the peer is detected as dead very soon...
retry at most once more in this case. */
__set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout((mdev->net_conf->ping_timeo+1)*HZ/10);
schedule_timeout_interruptible((mdev->net_conf->ping_timeo+1)*HZ/10);
if (try < max_tries)
try = max_tries - 1;
continue;
}
if (r < SS_SUCCESS) {
r = _drbd_request_state(mdev, mask, val,
if (rv < SS_SUCCESS) {
rv = _drbd_request_state(mdev, mask, val,
CS_VERBOSE + CS_WAIT_COMPLETE);
if (r < SS_SUCCESS)
if (rv < SS_SUCCESS)
goto fail;
}
break;
}
if (r < SS_SUCCESS)
if (rv < SS_SUCCESS)
goto fail;
if (forced)
@ -384,7 +384,7 @@ int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0);
if (new_role == R_SECONDARY) {
set_disk_ro(mdev->vdisk, TRUE);
set_disk_ro(mdev->vdisk, true);
if (get_ldev(mdev)) {
mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
put_ldev(mdev);
@ -394,7 +394,7 @@ int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
mdev->net_conf->want_lose = 0;
put_net_conf(mdev);
}
set_disk_ro(mdev->vdisk, FALSE);
set_disk_ro(mdev->vdisk, false);
if (get_ldev(mdev)) {
if (((mdev->state.conn < C_CONNECTED ||
mdev->state.pdsk <= D_FAILED)
@ -406,10 +406,8 @@ int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
}
}
if ((new_role == R_SECONDARY) && get_ldev(mdev)) {
drbd_al_to_on_disk_bm(mdev);
put_ldev(mdev);
}
/* writeout of activity log covered areas of the bitmap
* to stable storage done in after state change already */
if (mdev->state.conn >= C_WF_REPORT_PARAMS) {
/* if this was forced, we should consider sync */
@ -423,7 +421,7 @@ int drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
fail:
mutex_unlock(&mdev->state_mutex);
return r;
return rv;
}
static struct drbd_conf *ensure_mdev(int minor, int create)
@ -528,17 +526,19 @@ static void drbd_md_set_sector_offsets(struct drbd_conf *mdev,
}
}
/* input size is expected to be in KB */
char *ppsize(char *buf, unsigned long long size)
{
/* Needs 9 bytes at max. */
/* Needs 9 bytes at max including trailing NUL:
* -1ULL ==> "16384 EB" */
static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' };
int base = 0;
while (size >= 10000) {
while (size >= 10000 && base < sizeof(units)-1) {
/* shift + round */
size = (size >> 10) + !!(size & (1<<9));
base++;
}
sprintf(buf, "%lu %cB", (long)size, units[base]);
sprintf(buf, "%u %cB", (unsigned)size, units[base]);
return buf;
}
@ -642,11 +642,19 @@ enum determine_dev_size drbd_determin_dev_size(struct drbd_conf *mdev, enum dds_
|| prev_size != mdev->ldev->md.md_size_sect;
if (la_size_changed || md_moved) {
int err;
drbd_al_shrink(mdev); /* All extents inactive. */
dev_info(DEV, "Writing the whole bitmap, %s\n",
la_size_changed && md_moved ? "size changed and md moved" :
la_size_changed ? "size changed" : "md moved");
rv = drbd_bitmap_io(mdev, &drbd_bm_write, "size changed"); /* does drbd_resume_io() ! */
/* next line implicitly does drbd_suspend_io()+drbd_resume_io() */
err = drbd_bitmap_io(mdev, &drbd_bm_write,
"size changed", BM_LOCKED_MASK);
if (err) {
rv = dev_size_error;
goto out;
}
drbd_md_mark_dirty(mdev);
}
@ -765,22 +773,21 @@ static int drbd_check_al_size(struct drbd_conf *mdev)
return 0;
}
void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_seg_s) __must_hold(local)
void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size) __must_hold(local)
{
struct request_queue * const q = mdev->rq_queue;
struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue;
int max_segments = mdev->ldev->dc.max_bio_bvecs;
int max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9);
max_seg_s = min(queue_max_sectors(b) * queue_logical_block_size(b), max_seg_s);
blk_queue_max_hw_sectors(q, max_seg_s >> 9);
blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS);
blk_queue_max_segment_size(q, max_seg_s);
blk_queue_logical_block_size(q, 512);
blk_queue_segment_boundary(q, PAGE_SIZE-1);
blk_stack_limits(&q->limits, &b->limits, 0);
blk_queue_max_hw_sectors(q, max_hw_sectors);
/* This is the workaround for "bio would need to, but cannot, be split" */
blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS);
blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1);
blk_queue_stack_limits(q, b);
dev_info(DEV, "max_segment_size ( = BIO size ) = %u\n", queue_max_segment_size(q));
dev_info(DEV, "max BIO size = %u\n", queue_max_hw_sectors(q) << 9);
if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) {
dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n",
@ -850,7 +857,7 @@ static void drbd_suspend_al(struct drbd_conf *mdev)
static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
struct drbd_nl_cfg_reply *reply)
{
enum drbd_ret_codes retcode;
enum drbd_ret_code retcode;
enum determine_dev_size dd;
sector_t max_possible_sectors;
sector_t min_md_device_sectors;
@ -858,8 +865,8 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
struct block_device *bdev;
struct lru_cache *resync_lru = NULL;
union drbd_state ns, os;
unsigned int max_seg_s;
int rv;
unsigned int max_bio_size;
enum drbd_state_rv rv;
int cp_discovered = 0;
int logical_block_size;
@ -1005,9 +1012,10 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
/* and for any other previously queued work */
drbd_flush_workqueue(mdev);
retcode = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE);
rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE);
retcode = rv; /* FIXME: Type mismatch. */
drbd_resume_io(mdev);
if (retcode < SS_SUCCESS)
if (rv < SS_SUCCESS)
goto fail;
if (!get_ldev_if_state(mdev, D_ATTACHING))
@ -1109,20 +1117,20 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
mdev->read_cnt = 0;
mdev->writ_cnt = 0;
max_seg_s = DRBD_MAX_SEGMENT_SIZE;
max_bio_size = DRBD_MAX_BIO_SIZE;
if (mdev->state.conn == C_CONNECTED) {
/* We are Primary, Connected, and now attach a new local
* backing store. We must not increase the user visible maximum
* bio size on this device to something the peer may not be
* able to handle. */
if (mdev->agreed_pro_version < 94)
max_seg_s = queue_max_segment_size(mdev->rq_queue);
max_bio_size = queue_max_hw_sectors(mdev->rq_queue) << 9;
else if (mdev->agreed_pro_version == 94)
max_seg_s = DRBD_MAX_SIZE_H80_PACKET;
max_bio_size = DRBD_MAX_SIZE_H80_PACKET;
/* else: drbd 8.3.9 and later, stay with default */
}
drbd_setup_queue_param(mdev, max_seg_s);
drbd_setup_queue_param(mdev, max_bio_size);
/* If I am currently not R_PRIMARY,
* but meta data primary indicator is set,
@ -1154,12 +1162,14 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) {
dev_info(DEV, "Assuming that all blocks are out of sync "
"(aka FullSync)\n");
if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write, "set_n_write from attaching")) {
if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write,
"set_n_write from attaching", BM_LOCKED_MASK)) {
retcode = ERR_IO_MD_DISK;
goto force_diskless_dec;
}
} else {
if (drbd_bitmap_io(mdev, &drbd_bm_read, "read from attaching") < 0) {
if (drbd_bitmap_io(mdev, &drbd_bm_read,
"read from attaching", BM_LOCKED_MASK) < 0) {
retcode = ERR_IO_MD_DISK;
goto force_diskless_dec;
}
@ -1167,7 +1177,11 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
if (cp_discovered) {
drbd_al_apply_to_bm(mdev);
drbd_al_to_on_disk_bm(mdev);
if (drbd_bitmap_io(mdev, &drbd_bm_write,
"crashed primary apply AL", BM_LOCKED_MASK)) {
retcode = ERR_IO_MD_DISK;
goto force_diskless_dec;
}
}
if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev))
@ -1279,7 +1293,7 @@ static int drbd_nl_net_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
struct drbd_nl_cfg_reply *reply)
{
int i, ns;
enum drbd_ret_codes retcode;
enum drbd_ret_code retcode;
struct net_conf *new_conf = NULL;
struct crypto_hash *tfm = NULL;
struct crypto_hash *integrity_w_tfm = NULL;
@ -1324,6 +1338,8 @@ static int drbd_nl_net_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
new_conf->wire_protocol = DRBD_PROT_C;
new_conf->ping_timeo = DRBD_PING_TIMEO_DEF;
new_conf->rr_conflict = DRBD_RR_CONFLICT_DEF;
new_conf->on_congestion = DRBD_ON_CONGESTION_DEF;
new_conf->cong_extents = DRBD_CONG_EXTENTS_DEF;
if (!net_conf_from_tags(mdev, nlp->tag_list, new_conf)) {
retcode = ERR_MANDATORY_TAG;
@ -1345,6 +1361,11 @@ static int drbd_nl_net_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
}
}
if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) {
retcode = ERR_CONG_NOT_PROTO_A;
goto fail;
}
if (mdev->state.role == R_PRIMARY && new_conf->want_lose) {
retcode = ERR_DISCARD;
goto fail;
@ -1525,6 +1546,21 @@ static int drbd_nl_disconnect(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl
struct drbd_nl_cfg_reply *reply)
{
int retcode;
struct disconnect dc;
memset(&dc, 0, sizeof(struct disconnect));
if (!disconnect_from_tags(mdev, nlp->tag_list, &dc)) {
retcode = ERR_MANDATORY_TAG;
goto fail;
}
if (dc.force) {
spin_lock_irq(&mdev->req_lock);
if (mdev->state.conn >= C_WF_CONNECTION)
_drbd_set_state(_NS(mdev, conn, C_DISCONNECTING), CS_HARD, NULL);
spin_unlock_irq(&mdev->req_lock);
goto done;
}
retcode = _drbd_request_state(mdev, NS(conn, C_DISCONNECTING), CS_ORDERED);
@ -1842,6 +1878,10 @@ static int drbd_nl_invalidate(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl
{
int retcode;
/* If there is still bitmap IO pending, probably because of a previous
* resync just being finished, wait for it before requesting a new resync. */
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED);
if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION)
@ -1877,6 +1917,10 @@ static int drbd_nl_invalidate_peer(struct drbd_conf *mdev, struct drbd_nl_cfg_re
{
int retcode;
/* If there is still bitmap IO pending, probably because of a previous
* resync just being finished, wait for it before requesting a new resync. */
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S), CS_ORDERED);
if (retcode < SS_SUCCESS) {
@ -1885,9 +1929,9 @@ static int drbd_nl_invalidate_peer(struct drbd_conf *mdev, struct drbd_nl_cfg_re
into a full resync. */
retcode = drbd_request_state(mdev, NS(pdsk, D_INCONSISTENT));
if (retcode >= SS_SUCCESS) {
/* open coded drbd_bitmap_io() */
if (drbd_bitmap_io(mdev, &drbd_bmio_set_susp_al,
"set_n_write from invalidate_peer"))
"set_n_write from invalidate_peer",
BM_LOCKED_SET_ALLOWED))
retcode = ERR_IO_MD_DISK;
}
} else
@ -1914,9 +1958,17 @@ static int drbd_nl_resume_sync(struct drbd_conf *mdev, struct drbd_nl_cfg_req *n
struct drbd_nl_cfg_reply *reply)
{
int retcode = NO_ERROR;
union drbd_state s;
if (drbd_request_state(mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO)
retcode = ERR_PAUSE_IS_CLEAR;
if (drbd_request_state(mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) {
s = mdev->state;
if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) {
retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP :
s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR;
} else {
retcode = ERR_PAUSE_IS_CLEAR;
}
}
reply->ret_code = retcode;
return 0;
@ -2054,6 +2106,11 @@ static int drbd_nl_start_ov(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
reply->ret_code = ERR_MANDATORY_TAG;
return 0;
}
/* If there is still bitmap IO pending, e.g. previous resync or verify
* just being finished, wait for it before requesting a new resync. */
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
/* w_make_ov_request expects position to be aligned */
mdev->ov_start_sector = args.start_sector & ~BM_SECT_PER_BIT;
reply->ret_code = drbd_request_state(mdev,NS(conn,C_VERIFY_S));
@ -2097,7 +2154,8 @@ static int drbd_nl_new_c_uuid(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl
drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */
if (args.clear_bm) {
err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write, "clear_n_write from new_c_uuid");
err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write,
"clear_n_write from new_c_uuid", BM_LOCKED_MASK);
if (err) {
dev_err(DEV, "Writing bitmap failed with %d\n",err);
retcode = ERR_IO_MD_DISK;
@ -2105,6 +2163,7 @@ static int drbd_nl_new_c_uuid(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl
if (skip_initial_sync) {
drbd_send_uuids_skip_initial_sync(mdev);
_drbd_uuid_set(mdev, UI_BITMAP, 0);
drbd_print_uuids(mdev, "cleared bitmap UUID");
spin_lock_irq(&mdev->req_lock);
_drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE),
CS_VERBOSE, NULL);
@ -2189,7 +2248,8 @@ static void drbd_connector_callback(struct cn_msg *req, struct netlink_skb_parms
goto fail;
}
if (nlp->packet_type >= P_nl_after_last_packet) {
if (nlp->packet_type >= P_nl_after_last_packet ||
nlp->packet_type == P_return_code_only) {
retcode = ERR_PACKET_NR;
goto fail;
}
@ -2205,7 +2265,7 @@ static void drbd_connector_callback(struct cn_msg *req, struct netlink_skb_parms
reply_size += cm->reply_body_size;
/* allocation not in the IO path, cqueue thread context */
cn_reply = kmalloc(reply_size, GFP_KERNEL);
cn_reply = kzalloc(reply_size, GFP_KERNEL);
if (!cn_reply) {
retcode = ERR_NOMEM;
goto fail;
@ -2213,7 +2273,7 @@ static void drbd_connector_callback(struct cn_msg *req, struct netlink_skb_parms
reply = (struct drbd_nl_cfg_reply *) cn_reply->data;
reply->packet_type =
cm->reply_body_size ? nlp->packet_type : P_nl_after_last_packet;
cm->reply_body_size ? nlp->packet_type : P_return_code_only;
reply->minor = nlp->drbd_minor;
reply->ret_code = NO_ERROR; /* Might by modified by cm->function. */
/* reply->tag_list; might be modified by cm->function. */
@ -2376,7 +2436,7 @@ void drbd_bcast_ee(struct drbd_conf *mdev,
/* receiver thread context, which is not in the writeout path (of this node),
* but may be in the writeout path of the _other_ node.
* GFP_NOIO to avoid potential "distributed deadlock". */
cn_reply = kmalloc(
cn_reply = kzalloc(
sizeof(struct cn_msg)+
sizeof(struct drbd_nl_cfg_reply)+
sizeof(struct dump_ee_tag_len_struct)+
@ -2398,10 +2458,11 @@ void drbd_bcast_ee(struct drbd_conf *mdev,
tl = tl_add_int(tl, T_ee_sector, &e->sector);
tl = tl_add_int(tl, T_ee_block_id, &e->block_id);
/* dump the first 32k */
len = min_t(unsigned, e->size, 32 << 10);
put_unaligned(T_ee_data, tl++);
put_unaligned(e->size, tl++);
put_unaligned(len, tl++);
len = e->size;
page = e->pages;
page_chain_for_each(page) {
void *d = kmap_atomic(page, KM_USER0);
@ -2410,6 +2471,8 @@ void drbd_bcast_ee(struct drbd_conf *mdev,
kunmap_atomic(d, KM_USER0);
tl = (unsigned short*)((char*)tl + l);
len -= l;
if (len == 0)
break;
}
put_unaligned(TT_END, tl++); /* Close the tag list */
@ -2508,6 +2571,7 @@ void drbd_nl_send_reply(struct cn_msg *req, int ret_code)
(struct drbd_nl_cfg_reply *)cn_reply->data;
int rr;
memset(buffer, 0, sizeof(buffer));
cn_reply->id = req->id;
cn_reply->seq = req->seq;
@ -2515,6 +2579,7 @@ void drbd_nl_send_reply(struct cn_msg *req, int ret_code)
cn_reply->len = sizeof(struct drbd_nl_cfg_reply);
cn_reply->flags = 0;
reply->packet_type = P_return_code_only;
reply->minor = ((struct drbd_nl_cfg_req *)req->data)->drbd_minor;
reply->ret_code = ret_code;

114
drivers/block/drbd/drbd_proc.c
View File

@ -34,6 +34,7 @@
#include "drbd_int.h"
static int drbd_proc_open(struct inode *inode, struct file *file);
static int drbd_proc_release(struct inode *inode, struct file *file);
struct proc_dir_entry *drbd_proc;
@ -42,9 +43,22 @@ const struct file_operations drbd_proc_fops = {
.open = drbd_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.release = drbd_proc_release,
};
void seq_printf_with_thousands_grouping(struct seq_file *seq, long v)
{
/* v is in kB/sec. We don't expect TiByte/sec yet. */
if (unlikely(v >= 1000000)) {
/* cool: > GiByte/s */
seq_printf(seq, "%ld,", v / 1000000);
v /= 1000000;
seq_printf(seq, "%03ld,%03ld", v/1000, v % 1000);
} else if (likely(v >= 1000))
seq_printf(seq, "%ld,%03ld", v/1000, v % 1000);
else
seq_printf(seq, "%ld", v);
}
/*lge
* progress bars shamelessly adapted from driver/md/md.c
@ -71,10 +85,15 @@ static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq)
seq_printf(seq, ".");
seq_printf(seq, "] ");
seq_printf(seq, "sync'ed:%3u.%u%% ", res / 10, res % 10);
/* if more than 1 GB display in MB */
if (mdev->rs_total > 0x100000L)
seq_printf(seq, "(%lu/%lu)M\n\t",
if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T)
seq_printf(seq, "verified:");
else
seq_printf(seq, "sync'ed:");
seq_printf(seq, "%3u.%u%% ", res / 10, res % 10);
/* if more than a few GB, display in MB */
if (mdev->rs_total > (4UL << (30 - BM_BLOCK_SHIFT)))
seq_printf(seq, "(%lu/%lu)M",
(unsigned long) Bit2KB(rs_left >> 10),
(unsigned long) Bit2KB(mdev->rs_total >> 10));
else
@ -94,6 +113,7 @@ static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq)
/* Rolling marks. last_mark+1 may just now be modified. last_mark+2 is
* at least (DRBD_SYNC_MARKS-2)*DRBD_SYNC_MARK_STEP old, and has at
* least DRBD_SYNC_MARK_STEP time before it will be modified. */
/* ------------------------ ~18s average ------------------------ */
i = (mdev->rs_last_mark + 2) % DRBD_SYNC_MARKS;
dt = (jiffies - mdev->rs_mark_time[i]) / HZ;
if (dt > (DRBD_SYNC_MARK_STEP * DRBD_SYNC_MARKS))
@ -107,14 +127,24 @@ static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq)
seq_printf(seq, "finish: %lu:%02lu:%02lu",
rt / 3600, (rt % 3600) / 60, rt % 60);
/* current speed average over (SYNC_MARKS * SYNC_MARK_STEP) jiffies */
dbdt = Bit2KB(db/dt);
if (dbdt > 1000)
seq_printf(seq, " speed: %ld,%03ld",
dbdt/1000, dbdt % 1000);
else
seq_printf(seq, " speed: %ld", dbdt);
seq_printf(seq, " speed: ");
seq_printf_with_thousands_grouping(seq, dbdt);
seq_printf(seq, " (");
/* ------------------------- ~3s average ------------------------ */
if (proc_details >= 1) {
/* this is what drbd_rs_should_slow_down() uses */
i = (mdev->rs_last_mark + DRBD_SYNC_MARKS-1) % DRBD_SYNC_MARKS;
dt = (jiffies - mdev->rs_mark_time[i]) / HZ;
if (!dt)
dt++;
db = mdev->rs_mark_left[i] - rs_left;
dbdt = Bit2KB(db/dt);
seq_printf_with_thousands_grouping(seq, dbdt);
seq_printf(seq, " -- ");
}
/* --------------------- long term average ---------------------- */
/* mean speed since syncer started
* we do account for PausedSync periods */
dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ;
@ -122,20 +152,34 @@ static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq)
dt = 1;
db = mdev->rs_total - rs_left;
dbdt = Bit2KB(db/dt);
if (dbdt > 1000)
seq_printf(seq, " (%ld,%03ld)",
dbdt/1000, dbdt % 1000);
else
seq_printf(seq, " (%ld)", dbdt);
seq_printf_with_thousands_grouping(seq, dbdt);
seq_printf(seq, ")");
if (mdev->state.conn == C_SYNC_TARGET) {
if (mdev->c_sync_rate > 1000)
seq_printf(seq, " want: %d,%03d",
mdev->c_sync_rate / 1000, mdev->c_sync_rate % 1000);
else
seq_printf(seq, " want: %d", mdev->c_sync_rate);
if (mdev->state.conn == C_SYNC_TARGET ||
mdev->state.conn == C_VERIFY_S) {
seq_printf(seq, " want: ");
seq_printf_with_thousands_grouping(seq, mdev->c_sync_rate);
}
seq_printf(seq, " K/sec%s\n", stalled ? " (stalled)" : "");
if (proc_details >= 1) {
/* 64 bit:
* we convert to sectors in the display below. */
unsigned long bm_bits = drbd_bm_bits(mdev);
unsigned long bit_pos;
if (mdev->state.conn == C_VERIFY_S ||
mdev->state.conn == C_VERIFY_T)
bit_pos = bm_bits - mdev->ov_left;
else
bit_pos = mdev->bm_resync_fo;
/* Total sectors may be slightly off for oddly
* sized devices. So what. */
seq_printf(seq,
"\t%3d%% sector pos: %llu/%llu\n",
(int)(bit_pos / (bm_bits/100+1)),
(unsigned long long)bit_pos * BM_SECT_PER_BIT,
(unsigned long long)bm_bits * BM_SECT_PER_BIT);
}
}
static void resync_dump_detail(struct seq_file *seq, struct lc_element *e)
@ -232,20 +276,16 @@ static int drbd_seq_show(struct seq_file *seq, void *v)
mdev->epochs,
write_ordering_chars[mdev->write_ordering]
);
seq_printf(seq, " oos:%lu\n",
Bit2KB(drbd_bm_total_weight(mdev)));
seq_printf(seq, " oos:%llu\n",
Bit2KB((unsigned long long)
drbd_bm_total_weight(mdev)));
}
if (mdev->state.conn == C_SYNC_SOURCE ||
mdev->state.conn == C_SYNC_TARGET)
mdev->state.conn == C_SYNC_TARGET ||
mdev->state.conn == C_VERIFY_S ||
mdev->state.conn == C_VERIFY_T)
drbd_syncer_progress(mdev, seq);
if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T)
seq_printf(seq, "\t%3d%% %lu/%lu\n",
(int)((mdev->rs_total-mdev->ov_left) /
(mdev->rs_total/100+1)),
mdev->rs_total - mdev->ov_left,
mdev->rs_total);
if (proc_details >= 1 && get_ldev_if_state(mdev, D_FAILED)) {
lc_seq_printf_stats(seq, mdev->resync);
lc_seq_printf_stats(seq, mdev->act_log);
@ -265,7 +305,15 @@ static int drbd_seq_show(struct seq_file *seq, void *v)
static int drbd_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, drbd_seq_show, PDE(inode)->data);
if (try_module_get(THIS_MODULE))
return single_open(file, drbd_seq_show, PDE(inode)->data);
return -ENODEV;
}
static int drbd_proc_release(struct inode *inode, struct file *file)
{
module_put(THIS_MODULE);
return single_release(inode, file);
}
/* PROC FS stuff end */

608
drivers/block/drbd/drbd_receiver.c
View File

File diff suppressed because it is too large Load Diff

169
drivers/block/drbd/drbd_req.c
View File

@ -140,9 +140,14 @@ static void _about_to_complete_local_write(struct drbd_conf *mdev,
struct hlist_node *n;
struct hlist_head *slot;
/* before we can signal completion to the upper layers,
* we may need to close the current epoch */
/* Before we can signal completion to the upper layers,
* we may need to close the current epoch.
* We can skip this, if this request has not even been sent, because we
* did not have a fully established connection yet/anymore, during
* bitmap exchange, or while we are C_AHEAD due to congestion policy.
*/
if (mdev->state.conn >= C_CONNECTED &&
(s & RQ_NET_SENT) != 0 &&
req->epoch == mdev->newest_tle->br_number)
queue_barrier(mdev);
@ -440,7 +445,7 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
req->rq_state |= RQ_LOCAL_COMPLETED;
req->rq_state &= ~RQ_LOCAL_PENDING;
__drbd_chk_io_error(mdev, FALSE);
__drbd_chk_io_error(mdev, false);
_req_may_be_done_not_susp(req, m);
put_ldev(mdev);
break;
@ -461,7 +466,7 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
D_ASSERT(!(req->rq_state & RQ_NET_MASK));
__drbd_chk_io_error(mdev, FALSE);
__drbd_chk_io_error(mdev, false);
put_ldev(mdev);
/* no point in retrying if there is no good remote data,
@ -545,6 +550,14 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
break;
case queue_for_send_oos:
req->rq_state |= RQ_NET_QUEUED;
req->w.cb = w_send_oos;
drbd_queue_work(&mdev->data.work, &req->w);
break;
case oos_handed_to_network:
/* actually the same */
case send_canceled:
/* treat it the same */
case send_failed:
@ -558,6 +571,9 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
case handed_over_to_network:
/* assert something? */
if (bio_data_dir(req->master_bio) == WRITE)
atomic_add(req->size>>9, &mdev->ap_in_flight);
if (bio_data_dir(req->master_bio) == WRITE &&
mdev->net_conf->wire_protocol == DRBD_PROT_A) {
/* this is what is dangerous about protocol A:
@ -591,6 +607,9 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
dec_ap_pending(mdev);
req->rq_state &= ~(RQ_NET_OK|RQ_NET_PENDING);
req->rq_state |= RQ_NET_DONE;
if (req->rq_state & RQ_NET_SENT && req->rq_state & RQ_WRITE)
atomic_sub(req->size>>9, &mdev->ap_in_flight);
/* if it is still queued, we may not complete it here.
* it will be canceled soon. */
if (!(req->rq_state & RQ_NET_QUEUED))
@ -628,14 +647,17 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
req->rq_state |= RQ_NET_OK;
D_ASSERT(req->rq_state & RQ_NET_PENDING);
dec_ap_pending(mdev);
atomic_sub(req->size>>9, &mdev->ap_in_flight);
req->rq_state &= ~RQ_NET_PENDING;
_req_may_be_done_not_susp(req, m);
break;
case neg_acked:
/* assert something? */
if (req->rq_state & RQ_NET_PENDING)
if (req->rq_state & RQ_NET_PENDING) {
dec_ap_pending(mdev);
atomic_sub(req->size>>9, &mdev->ap_in_flight);
}
req->rq_state &= ~(RQ_NET_OK|RQ_NET_PENDING);
req->rq_state |= RQ_NET_DONE;
@ -690,8 +712,11 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
dev_err(DEV, "FIXME (barrier_acked but pending)\n");
list_move(&req->tl_requests, &mdev->out_of_sequence_requests);
}
D_ASSERT(req->rq_state & RQ_NET_SENT);
req->rq_state |= RQ_NET_DONE;
if ((req->rq_state & RQ_NET_MASK) != 0) {
req->rq_state |= RQ_NET_DONE;
if (mdev->net_conf->wire_protocol == DRBD_PROT_A)
atomic_sub(req->size>>9, &mdev->ap_in_flight);
}
_req_may_be_done(req, m); /* Allowed while state.susp */
break;
@ -738,14 +763,14 @@ static int drbd_may_do_local_read(struct drbd_conf *mdev, sector_t sector, int s
return 0 == drbd_bm_count_bits(mdev, sbnr, ebnr);
}
static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio)
static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio, unsigned long start_time)
{
const int rw = bio_rw(bio);
const int size = bio->bi_size;
const sector_t sector = bio->bi_sector;
struct drbd_tl_epoch *b = NULL;
struct drbd_request *req;
int local, remote;
int local, remote, send_oos = 0;
int err = -EIO;
int ret = 0;
@ -759,6 +784,7 @@ static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio)
bio_endio(bio, -ENOMEM);
return 0;
}
req->start_time = start_time;
local = get_ldev(mdev);
if (!local) {
@ -808,9 +834,9 @@ static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio)
drbd_al_begin_io(mdev, sector);
}
remote = remote && (mdev->state.pdsk == D_UP_TO_DATE ||
(mdev->state.pdsk == D_INCONSISTENT &&
mdev->state.conn >= C_CONNECTED));
remote = remote && drbd_should_do_remote(mdev->state);
send_oos = rw == WRITE && drbd_should_send_oos(mdev->state);
D_ASSERT(!(remote && send_oos));
if (!(local || remote) && !is_susp(mdev->state)) {
if (__ratelimit(&drbd_ratelimit_state))
@ -824,7 +850,7 @@ static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio)
* but there is a race between testing the bit and pointer outside the
* spinlock, and grabbing the spinlock.
* if we lost that race, we retry. */
if (rw == WRITE && remote &&
if (rw == WRITE && (remote || send_oos) &&
mdev->unused_spare_tle == NULL &&
test_bit(CREATE_BARRIER, &mdev->flags)) {
allocate_barrier:
@ -842,18 +868,19 @@ allocate_barrier:
if (is_susp(mdev->state)) {
/* If we got suspended, use the retry mechanism of
generic_make_request() to restart processing of this
bio. In the next call to drbd_make_request_26
bio. In the next call to drbd_make_request
we sleep in inc_ap_bio() */
ret = 1;
spin_unlock_irq(&mdev->req_lock);
goto fail_free_complete;
}
if (remote) {
remote = (mdev->state.pdsk == D_UP_TO_DATE ||
(mdev->state.pdsk == D_INCONSISTENT &&
mdev->state.conn >= C_CONNECTED));
if (!remote)
if (remote || send_oos) {
remote = drbd_should_do_remote(mdev->state);
send_oos = rw == WRITE && drbd_should_send_oos(mdev->state);
D_ASSERT(!(remote && send_oos));
if (!(remote || send_oos))
dev_warn(DEV, "lost connection while grabbing the req_lock!\n");
if (!(local || remote)) {
dev_err(DEV, "IO ERROR: neither local nor remote disk\n");
@ -866,7 +893,7 @@ allocate_barrier:
mdev->unused_spare_tle = b;
b = NULL;
}
if (rw == WRITE && remote &&
if (rw == WRITE && (remote || send_oos) &&
mdev->unused_spare_tle == NULL &&
test_bit(CREATE_BARRIER, &mdev->flags)) {
/* someone closed the current epoch
@ -889,7 +916,7 @@ allocate_barrier:
* barrier packet. To get the write ordering right, we only have to
* make sure that, if this is a write request and it triggered a
* barrier packet, this request is queued within the same spinlock. */
if (remote && mdev->unused_spare_tle &&
if ((remote || send_oos) && mdev->unused_spare_tle &&
test_and_clear_bit(CREATE_BARRIER, &mdev->flags)) {
_tl_add_barrier(mdev, mdev->unused_spare_tle);
mdev->unused_spare_tle = NULL;
@ -937,6 +964,34 @@ allocate_barrier:
? queue_for_net_write
: queue_for_net_read);
}
if (send_oos && drbd_set_out_of_sync(mdev, sector, size))
_req_mod(req, queue_for_send_oos);
if (remote &&
mdev->net_conf->on_congestion != OC_BLOCK && mdev->agreed_pro_version >= 96) {
int congested = 0;
if (mdev->net_conf->cong_fill &&
atomic_read(&mdev->ap_in_flight) >= mdev->net_conf->cong_fill) {
dev_info(DEV, "Congestion-fill threshold reached\n");
congested = 1;
}
if (mdev->act_log->used >= mdev->net_conf->cong_extents) {
dev_info(DEV, "Congestion-extents threshold reached\n");
congested = 1;
}
if (congested) {
queue_barrier(mdev); /* last barrier, after mirrored writes */
if (mdev->net_conf->on_congestion == OC_PULL_AHEAD)
_drbd_set_state(_NS(mdev, conn, C_AHEAD), 0, NULL);
else /*mdev->net_conf->on_congestion == OC_DISCONNECT */
_drbd_set_state(_NS(mdev, conn, C_DISCONNECTING), 0, NULL);
}
}
spin_unlock_irq(&mdev->req_lock);
kfree(b); /* if someone else has beaten us to it... */
@ -949,9 +1004,9 @@ allocate_barrier:
* stable storage, and this is a WRITE, we may not even submit
* this bio. */
if (get_ldev(mdev)) {
if (FAULT_ACTIVE(mdev, rw == WRITE ? DRBD_FAULT_DT_WR
: rw == READ ? DRBD_FAULT_DT_RD
: DRBD_FAULT_DT_RA))
if (drbd_insert_fault(mdev, rw == WRITE ? DRBD_FAULT_DT_WR
: rw == READ ? DRBD_FAULT_DT_RD
: DRBD_FAULT_DT_RA))
bio_endio(req->private_bio, -EIO);
else
generic_make_request(req->private_bio);
@ -1018,16 +1073,19 @@ static int drbd_fail_request_early(struct drbd_conf *mdev, int is_write)
return 0;
}
int drbd_make_request_26(struct request_queue *q, struct bio *bio)
int drbd_make_request(struct request_queue *q, struct bio *bio)
{
unsigned int s_enr, e_enr;
struct drbd_conf *mdev = (struct drbd_conf *) q->queuedata;
unsigned long start_time;
if (drbd_fail_request_early(mdev, bio_data_dir(bio) & WRITE)) {
bio_endio(bio, -EPERM);
return 0;
}
start_time = jiffies;
/*
* what we "blindly" assume:
*/
@ -1042,12 +1100,12 @@ int drbd_make_request_26(struct request_queue *q, struct bio *bio)
if (likely(s_enr == e_enr)) {
inc_ap_bio(mdev, 1);
return drbd_make_request_common(mdev, bio);
return drbd_make_request_common(mdev, bio, start_time);
}
/* can this bio be split generically?
* Maybe add our own split-arbitrary-bios function. */
if (bio->bi_vcnt != 1 || bio->bi_idx != 0 || bio->bi_size > DRBD_MAX_SEGMENT_SIZE) {
if (bio->bi_vcnt != 1 || bio->bi_idx != 0 || bio->bi_size > DRBD_MAX_BIO_SIZE) {
/* rather error out here than BUG in bio_split */
dev_err(DEV, "bio would need to, but cannot, be split: "
"(vcnt=%u,idx=%u,size=%u,sector=%llu)\n",
@ -1069,11 +1127,7 @@ int drbd_make_request_26(struct request_queue *q, struct bio *bio)
const int sps = 1 << HT_SHIFT; /* sectors per slot */
const int mask = sps - 1;
const sector_t first_sectors = sps - (sect & mask);
bp = bio_split(bio,
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
bio_split_pool,
#endif
first_sectors);
bp = bio_split(bio, first_sectors);
/* we need to get a "reference count" (ap_bio_cnt)
* to avoid races with the disconnect/reconnect/suspend code.
@ -1084,10 +1138,10 @@ int drbd_make_request_26(struct request_queue *q, struct bio *bio)
D_ASSERT(e_enr == s_enr + 1);
while (drbd_make_request_common(mdev, &bp->bio1))
while (drbd_make_request_common(mdev, &bp->bio1, start_time))
inc_ap_bio(mdev, 1);
while (drbd_make_request_common(mdev, &bp->bio2))
while (drbd_make_request_common(mdev, &bp->bio2, start_time))
inc_ap_bio(mdev, 1);
dec_ap_bio(mdev);
@ -1098,7 +1152,7 @@ int drbd_make_request_26(struct request_queue *q, struct bio *bio)
}
/* This is called by bio_add_page(). With this function we reduce
* the number of BIOs that span over multiple DRBD_MAX_SEGMENT_SIZEs
* the number of BIOs that span over multiple DRBD_MAX_BIO_SIZEs
* units (was AL_EXTENTs).
*
* we do the calculation within the lower 32bit of the byte offsets,
@ -1108,7 +1162,7 @@ int drbd_make_request_26(struct request_queue *q, struct bio *bio)
* As long as the BIO is empty we have to allow at least one bvec,
* regardless of size and offset. so the resulting bio may still
* cross extent boundaries. those are dealt with (bio_split) in
* drbd_make_request_26.
* drbd_make_request.
*/
int drbd_merge_bvec(struct request_queue *q, struct bvec_merge_data *bvm, struct bio_vec *bvec)
{
@ -1118,8 +1172,8 @@ int drbd_merge_bvec(struct request_queue *q, struct bvec_merge_data *bvm, struct
unsigned int bio_size = bvm->bi_size;
int limit, backing_limit;
limit = DRBD_MAX_SEGMENT_SIZE
- ((bio_offset & (DRBD_MAX_SEGMENT_SIZE-1)) + bio_size);
limit = DRBD_MAX_BIO_SIZE
- ((bio_offset & (DRBD_MAX_BIO_SIZE-1)) + bio_size);
if (limit < 0)
limit = 0;
if (bio_size == 0) {
@ -1136,3 +1190,42 @@ int drbd_merge_bvec(struct request_queue *q, struct bvec_merge_data *bvm, struct
}
return limit;
}
void request_timer_fn(unsigned long data)
{
struct drbd_conf *mdev = (struct drbd_conf *) data;
struct drbd_request *req; /* oldest request */
struct list_head *le;
unsigned long et = 0; /* effective timeout = ko_count * timeout */
if (get_net_conf(mdev)) {
et = mdev->net_conf->timeout*HZ/10 * mdev->net_conf->ko_count;
put_net_conf(mdev);
}
if (!et || mdev->state.conn < C_WF_REPORT_PARAMS)
return; /* Recurring timer stopped */
spin_lock_irq(&mdev->req_lock);
le = &mdev->oldest_tle->requests;
if (list_empty(le)) {
spin_unlock_irq(&mdev->req_lock);
mod_timer(&mdev->request_timer, jiffies + et);
return;
}
le = le->prev;
req = list_entry(le, struct drbd_request, tl_requests);
if (time_is_before_eq_jiffies(req->start_time + et)) {
if (req->rq_state & RQ_NET_PENDING) {
dev_warn(DEV, "Remote failed to finish a request within ko-count * timeout\n");
_drbd_set_state(_NS(mdev, conn, C_TIMEOUT), CS_VERBOSE, NULL);
} else {
dev_warn(DEV, "Local backing block device frozen?\n");
mod_timer(&mdev->request_timer, jiffies + et);
}
} else {
mod_timer(&mdev->request_timer, req->start_time + et);
}
spin_unlock_irq(&mdev->req_lock);
}

36
drivers/block/drbd/drbd_req.h
View File

@ -82,14 +82,16 @@ enum drbd_req_event {
to_be_submitted,
/* XXX yes, now I am inconsistent...
* these two are not "events" but "actions"
* these are not "events" but "actions"
* oh, well... */
queue_for_net_write,
queue_for_net_read,
queue_for_send_oos,
send_canceled,
send_failed,
handed_over_to_network,
oos_handed_to_network,
connection_lost_while_pending,
read_retry_remote_canceled,
recv_acked_by_peer,
@ -289,7 +291,6 @@ static inline struct drbd_request *drbd_req_new(struct drbd_conf *mdev,
req->epoch = 0;
req->sector = bio_src->bi_sector;
req->size = bio_src->bi_size;
req->start_time = jiffies;
INIT_HLIST_NODE(&req->colision);
INIT_LIST_HEAD(&req->tl_requests);
INIT_LIST_HEAD(&req->w.list);
@ -321,6 +322,7 @@ extern int __req_mod(struct drbd_request *req, enum drbd_req_event what,
struct bio_and_error *m);
extern void complete_master_bio(struct drbd_conf *mdev,
struct bio_and_error *m);
extern void request_timer_fn(unsigned long data);
/* use this if you don't want to deal with calling complete_master_bio()
* outside the spinlock, e.g. when walking some list on cleanup. */
@ -338,23 +340,43 @@ static inline int _req_mod(struct drbd_request *req, enum drbd_req_event what)
return rv;
}
/* completion of master bio is outside of spinlock.
* If you need it irqsave, do it your self!
* Which means: don't use from bio endio callback. */
/* completion of master bio is outside of our spinlock.
* We still may or may not be inside some irqs disabled section
* of the lower level driver completion callback, so we need to
* spin_lock_irqsave here. */
static inline int req_mod(struct drbd_request *req,
enum drbd_req_event what)
{
unsigned long flags;
struct drbd_conf *mdev = req->mdev;
struct bio_and_error m;
int rv;
spin_lock_irq(&mdev->req_lock);
spin_lock_irqsave(&mdev->req_lock, flags);
rv = __req_mod(req, what, &m);
spin_unlock_irq(&mdev->req_lock);
spin_unlock_irqrestore(&mdev->req_lock, flags);
if (m.bio)
complete_master_bio(mdev, &m);
return rv;
}
static inline bool drbd_should_do_remote(union drbd_state s)
{
return s.pdsk == D_UP_TO_DATE ||
(s.pdsk >= D_INCONSISTENT &&
s.conn >= C_WF_BITMAP_T &&
s.conn < C_AHEAD);
/* Before proto 96 that was >= CONNECTED instead of >= C_WF_BITMAP_T.
That is equivalent since before 96 IO was frozen in the C_WF_BITMAP*
states. */
}
static inline bool drbd_should_send_oos(union drbd_state s)
{
return s.conn == C_AHEAD || s.conn == C_WF_BITMAP_S;
/* pdsk = D_INCONSISTENT as a consequence. Protocol 96 check not necessary
since we enter state C_AHEAD only if proto >= 96 */
}
#endif

6
drivers/block/drbd/drbd_strings.c
View File

@ -48,6 +48,8 @@ static const char *drbd_conn_s_names[] = {
[C_PAUSED_SYNC_T] = "PausedSyncT",
[C_VERIFY_S] = "VerifyS",
[C_VERIFY_T] = "VerifyT",
[C_AHEAD] = "Ahead",
[C_BEHIND] = "Behind",
};
static const char *drbd_role_s_names[] = {
@ -92,7 +94,7 @@ static const char *drbd_state_sw_errors[] = {
const char *drbd_conn_str(enum drbd_conns s)
{
/* enums are unsigned... */
return s > C_PAUSED_SYNC_T ? "TOO_LARGE" : drbd_conn_s_names[s];
return s > C_BEHIND ? "TOO_LARGE" : drbd_conn_s_names[s];
}
const char *drbd_role_str(enum drbd_role s)
@ -105,7 +107,7 @@ const char *drbd_disk_str(enum drbd_disk_state s)
return s > D_UP_TO_DATE ? "TOO_LARGE" : drbd_disk_s_names[s];
}
const char *drbd_set_st_err_str(enum drbd_state_ret_codes err)
const char *drbd_set_st_err_str(enum drbd_state_rv err)
{
return err <= SS_AFTER_LAST_ERROR ? "TOO_SMALL" :
err > SS_TWO_PRIMARIES ? "TOO_LARGE"

368
drivers/block/drbd/drbd_worker.c
View File

@ -39,18 +39,17 @@
#include "drbd_req.h"
static int w_make_ov_request(struct drbd_conf *mdev, struct drbd_work *w, int cancel);
static int w_make_resync_request(struct drbd_conf *mdev,
struct drbd_work *w, int cancel);
/* defined here:
drbd_md_io_complete
drbd_endio_sec
drbd_endio_pri
* more endio handlers:
atodb_endio in drbd_actlog.c
drbd_bm_async_io_complete in drbd_bitmap.c
/* endio handlers:
* drbd_md_io_complete (defined here)
* drbd_endio_pri (defined here)
* drbd_endio_sec (defined here)
* bm_async_io_complete (defined in drbd_bitmap.c)
*
* For all these callbacks, note the following:
* The callbacks will be called in irq context by the IDE drivers,
* and in Softirqs/Tasklets/BH context by the SCSI drivers.
@ -94,7 +93,7 @@ void drbd_endio_read_sec_final(struct drbd_epoch_entry *e) __releases(local)
if (list_empty(&mdev->read_ee))
wake_up(&mdev->ee_wait);
if (test_bit(__EE_WAS_ERROR, &e->flags))
__drbd_chk_io_error(mdev, FALSE);
__drbd_chk_io_error(mdev, false);
spin_unlock_irqrestore(&mdev->req_lock, flags);
drbd_queue_work(&mdev->data.work, &e->w);
@ -137,7 +136,7 @@ static void drbd_endio_write_sec_final(struct drbd_epoch_entry *e) __releases(lo
: list_empty(&mdev->active_ee);
if (test_bit(__EE_WAS_ERROR, &e->flags))
__drbd_chk_io_error(mdev, FALSE);
__drbd_chk_io_error(mdev, false);
spin_unlock_irqrestore(&mdev->req_lock, flags);
if (is_syncer_req)
@ -163,14 +162,15 @@ void drbd_endio_sec(struct bio *bio, int error)
int uptodate = bio_flagged(bio, BIO_UPTODATE);
int is_write = bio_data_dir(bio) == WRITE;
if (error)
if (error && __ratelimit(&drbd_ratelimit_state))
dev_warn(DEV, "%s: error=%d s=%llus\n",
is_write ? "write" : "read", error,
(unsigned long long)e->sector);
if (!error && !uptodate) {
dev_warn(DEV, "%s: setting error to -EIO s=%llus\n",
is_write ? "write" : "read",
(unsigned long long)e->sector);
if (__ratelimit(&drbd_ratelimit_state))
dev_warn(DEV, "%s: setting error to -EIO s=%llus\n",
is_write ? "write" : "read",
(unsigned long long)e->sector);
/* strange behavior of some lower level drivers...
* fail the request by clearing the uptodate flag,
* but do not return any error?! */
@ -250,13 +250,6 @@ int w_read_retry_remote(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
return w_send_read_req(mdev, w, 0);
}
int w_resync_inactive(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
{
ERR_IF(cancel) return 1;
dev_err(DEV, "resync inactive, but callback triggered??\n");
return 1; /* Simply ignore this! */
}
void drbd_csum_ee(struct drbd_conf *mdev, struct crypto_hash *tfm, struct drbd_epoch_entry *e, void *digest)
{
struct hash_desc desc;
@ -355,7 +348,7 @@ static int read_for_csum(struct drbd_conf *mdev, sector_t sector, int size)
if (!get_ldev(mdev))
return -EIO;
if (drbd_rs_should_slow_down(mdev))
if (drbd_rs_should_slow_down(mdev, sector))
goto defer;
/* GFP_TRY, because if there is no memory available right now, this may
@ -373,9 +366,10 @@ static int read_for_csum(struct drbd_conf *mdev, sector_t sector, int size)
if (drbd_submit_ee(mdev, e, READ, DRBD_FAULT_RS_RD) == 0)
return 0;
/* drbd_submit_ee currently fails for one reason only:
* not being able to allocate enough bios.
* Is dropping the connection going to help? */
/* If it failed because of ENOMEM, retry should help. If it failed
* because bio_add_page failed (probably broken lower level driver),
* retry may or may not help.
* If it does not, you may need to force disconnect. */
spin_lock_irq(&mdev->req_lock);
list_del(&e->w.list);
spin_unlock_irq(&mdev->req_lock);
@ -386,26 +380,25 @@ defer:
return -EAGAIN;
}
int w_resync_timer(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
{
switch (mdev->state.conn) {
case C_VERIFY_S:
w_make_ov_request(mdev, w, cancel);
break;
case C_SYNC_TARGET:
w_make_resync_request(mdev, w, cancel);
break;
}
return 1;
}
void resync_timer_fn(unsigned long data)
{
struct drbd_conf *mdev = (struct drbd_conf *) data;
int queue;
queue = 1;
switch (mdev->state.conn) {
case C_VERIFY_S:
mdev->resync_work.cb = w_make_ov_request;
break;
case C_SYNC_TARGET:
mdev->resync_work.cb = w_make_resync_request;
break;
default:
queue = 0;
mdev->resync_work.cb = w_resync_inactive;
}
/* harmless race: list_empty outside data.work.q_lock */
if (list_empty(&mdev->resync_work.list) && queue)
if (list_empty(&mdev->resync_work.list))
drbd_queue_work(&mdev->data.work, &mdev->resync_work);
}
@ -438,7 +431,7 @@ static void fifo_add_val(struct fifo_buffer *fb, int value)
fb->values[i] += value;
}
int drbd_rs_controller(struct drbd_conf *mdev)
static int drbd_rs_controller(struct drbd_conf *mdev)
{
unsigned int sect_in; /* Number of sectors that came in since the last turn */
unsigned int want; /* The number of sectors we want in the proxy */
@ -492,29 +485,36 @@ int drbd_rs_controller(struct drbd_conf *mdev)
return req_sect;
}
int w_make_resync_request(struct drbd_conf *mdev,
struct drbd_work *w, int cancel)
static int drbd_rs_number_requests(struct drbd_conf *mdev)
{
int number;
if (mdev->rs_plan_s.size) { /* mdev->sync_conf.c_plan_ahead */
number = drbd_rs_controller(mdev) >> (BM_BLOCK_SHIFT - 9);
mdev->c_sync_rate = number * HZ * (BM_BLOCK_SIZE / 1024) / SLEEP_TIME;
} else {
mdev->c_sync_rate = mdev->sync_conf.rate;
number = SLEEP_TIME * mdev->c_sync_rate / ((BM_BLOCK_SIZE / 1024) * HZ);
}
/* ignore the amount of pending requests, the resync controller should
* throttle down to incoming reply rate soon enough anyways. */
return number;
}
static int w_make_resync_request(struct drbd_conf *mdev,
struct drbd_work *w, int cancel)
{
unsigned long bit;
sector_t sector;
const sector_t capacity = drbd_get_capacity(mdev->this_bdev);
int max_segment_size;
int number, rollback_i, size, pe, mx;
int max_bio_size;
int number, rollback_i, size;
int align, queued, sndbuf;
int i = 0;
if (unlikely(cancel))
return 1;
if (unlikely(mdev->state.conn < C_CONNECTED)) {
dev_err(DEV, "Confused in w_make_resync_request()! cstate < Connected");
return 0;
}
if (mdev->state.conn != C_SYNC_TARGET)
dev_err(DEV, "%s in w_make_resync_request\n",
drbd_conn_str(mdev->state.conn));
if (mdev->rs_total == 0) {
/* empty resync? */
drbd_resync_finished(mdev);
@ -527,49 +527,19 @@ int w_make_resync_request(struct drbd_conf *mdev,
to continue resync with a broken disk makes no sense at
all */
dev_err(DEV, "Disk broke down during resync!\n");
mdev->resync_work.cb = w_resync_inactive;
return 1;
}
/* starting with drbd 8.3.8, we can handle multi-bio EEs,
* if it should be necessary */
max_segment_size =
mdev->agreed_pro_version < 94 ? queue_max_segment_size(mdev->rq_queue) :
mdev->agreed_pro_version < 95 ? DRBD_MAX_SIZE_H80_PACKET : DRBD_MAX_SEGMENT_SIZE;
max_bio_size =
mdev->agreed_pro_version < 94 ? queue_max_hw_sectors(mdev->rq_queue) << 9 :
mdev->agreed_pro_version < 95 ? DRBD_MAX_SIZE_H80_PACKET : DRBD_MAX_BIO_SIZE;
if (mdev->rs_plan_s.size) { /* mdev->sync_conf.c_plan_ahead */
number = drbd_rs_controller(mdev) >> (BM_BLOCK_SHIFT - 9);
mdev->c_sync_rate = number * HZ * (BM_BLOCK_SIZE / 1024) / SLEEP_TIME;
} else {
mdev->c_sync_rate = mdev->sync_conf.rate;
number = SLEEP_TIME * mdev->c_sync_rate / ((BM_BLOCK_SIZE / 1024) * HZ);
}
/* Throttle resync on lower level disk activity, which may also be
* caused by application IO on Primary/SyncTarget.
* Keep this after the call to drbd_rs_controller, as that assumes
* to be called as precisely as possible every SLEEP_TIME,
* and would be confused otherwise. */
if (drbd_rs_should_slow_down(mdev))
number = drbd_rs_number_requests(mdev);
if (number == 0)
goto requeue;
mutex_lock(&mdev->data.mutex);
if (mdev->data.socket)
mx = mdev->data.socket->sk->sk_rcvbuf / sizeof(struct p_block_req);
else
mx = 1;
mutex_unlock(&mdev->data.mutex);
/* For resync rates >160MB/sec, allow more pending RS requests */
if (number > mx)
mx = number;
/* Limit the number of pending RS requests to no more than the peer's receive buffer */
pe = atomic_read(&mdev->rs_pending_cnt);
if ((pe + number) > mx) {
number = mx - pe;
}
for (i = 0; i < number; i++) {
/* Stop generating RS requests, when half of the send buffer is filled */
mutex_lock(&mdev->data.mutex);
@ -588,16 +558,16 @@ next_sector:
size = BM_BLOCK_SIZE;
bit = drbd_bm_find_next(mdev, mdev->bm_resync_fo);
if (bit == -1UL) {
if (bit == DRBD_END_OF_BITMAP) {
mdev->bm_resync_fo = drbd_bm_bits(mdev);
mdev->resync_work.cb = w_resync_inactive;
put_ldev(mdev);
return 1;
}
sector = BM_BIT_TO_SECT(bit);
if (drbd_try_rs_begin_io(mdev, sector)) {
if (drbd_rs_should_slow_down(mdev, sector) ||
drbd_try_rs_begin_io(mdev, sector)) {
mdev->bm_resync_fo = bit;
goto requeue;
}
@ -608,7 +578,7 @@ next_sector:
goto next_sector;
}
#if DRBD_MAX_SEGMENT_SIZE > BM_BLOCK_SIZE
#if DRBD_MAX_BIO_SIZE > BM_BLOCK_SIZE
/* try to find some adjacent bits.
* we stop if we have already the maximum req size.
*
@ -618,7 +588,7 @@ next_sector:
align = 1;
rollback_i = i;
for (;;) {
if (size + BM_BLOCK_SIZE > max_segment_size)
if (size + BM_BLOCK_SIZE > max_bio_size)
break;
/* Be always aligned */
@ -685,7 +655,6 @@ next_sector:
* resync data block, and the last bit is cleared.
* until then resync "work" is "inactive" ...
*/
mdev->resync_work.cb = w_resync_inactive;
put_ldev(mdev);
return 1;
}
@ -706,27 +675,18 @@ static int w_make_ov_request(struct drbd_conf *mdev, struct drbd_work *w, int ca
if (unlikely(cancel))
return 1;
if (unlikely(mdev->state.conn < C_CONNECTED)) {
dev_err(DEV, "Confused in w_make_ov_request()! cstate < Connected");
return 0;
}
number = SLEEP_TIME*mdev->sync_conf.rate / ((BM_BLOCK_SIZE/1024)*HZ);
if (atomic_read(&mdev->rs_pending_cnt) > number)
goto requeue;
number -= atomic_read(&mdev->rs_pending_cnt);
number = drbd_rs_number_requests(mdev);
sector = mdev->ov_position;
for (i = 0; i < number; i++) {
if (sector >= capacity) {
mdev->resync_work.cb = w_resync_inactive;
return 1;
}
size = BM_BLOCK_SIZE;
if (drbd_try_rs_begin_io(mdev, sector)) {
if (drbd_rs_should_slow_down(mdev, sector) ||
drbd_try_rs_begin_io(mdev, sector)) {
mdev->ov_position = sector;
goto requeue;
}
@ -744,11 +704,33 @@ static int w_make_ov_request(struct drbd_conf *mdev, struct drbd_work *w, int ca
mdev->ov_position = sector;
requeue:
mdev->rs_in_flight += (i << (BM_BLOCK_SHIFT - 9));
mod_timer(&mdev->resync_timer, jiffies + SLEEP_TIME);
return 1;
}
void start_resync_timer_fn(unsigned long data)
{
struct drbd_conf *mdev = (struct drbd_conf *) data;
drbd_queue_work(&mdev->data.work, &mdev->start_resync_work);
}
int w_start_resync(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
{
if (atomic_read(&mdev->unacked_cnt) || atomic_read(&mdev->rs_pending_cnt)) {
dev_warn(DEV, "w_start_resync later...\n");
mdev->start_resync_timer.expires = jiffies + HZ/10;
add_timer(&mdev->start_resync_timer);
return 1;
}
drbd_start_resync(mdev, C_SYNC_SOURCE);
clear_bit(AHEAD_TO_SYNC_SOURCE, &mdev->current_epoch->flags);
return 1;
}
int w_ov_finished(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
{
kfree(w);
@ -782,6 +764,7 @@ int drbd_resync_finished(struct drbd_conf *mdev)
union drbd_state os, ns;
struct drbd_work *w;
char *khelper_cmd = NULL;
int verify_done = 0;
/* Remove all elements from the resync LRU. Since future actions
* might set bits in the (main) bitmap, then the entries in the
@ -792,8 +775,7 @@ int drbd_resync_finished(struct drbd_conf *mdev)
* queue (or even the read operations for those packets
* is not finished by now). Retry in 100ms. */
__set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ / 10);
schedule_timeout_interruptible(HZ / 10);
w = kmalloc(sizeof(struct drbd_work), GFP_ATOMIC);
if (w) {
w->cb = w_resync_finished;
@ -818,6 +800,8 @@ int drbd_resync_finished(struct drbd_conf *mdev)
spin_lock_irq(&mdev->req_lock);
os = mdev->state;
verify_done = (os.conn == C_VERIFY_S || os.conn == C_VERIFY_T);
/* This protects us against multiple calls (that can happen in the presence
of application IO), and against connectivity loss just before we arrive here. */
if (os.conn <= C_CONNECTED)
@ -827,8 +811,7 @@ int drbd_resync_finished(struct drbd_conf *mdev)
ns.conn = C_CONNECTED;
dev_info(DEV, "%s done (total %lu sec; paused %lu sec; %lu K/sec)\n",
(os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) ?
"Online verify " : "Resync",
verify_done ? "Online verify " : "Resync",
dt + mdev->rs_paused, mdev->rs_paused, dbdt);
n_oos = drbd_bm_total_weight(mdev);
@ -886,14 +869,18 @@ int drbd_resync_finished(struct drbd_conf *mdev)
}
}
drbd_uuid_set_bm(mdev, 0UL);
if (mdev->p_uuid) {
/* Now the two UUID sets are equal, update what we
* know of the peer. */
int i;
for (i = UI_CURRENT ; i <= UI_HISTORY_END ; i++)
mdev->p_uuid[i] = mdev->ldev->md.uuid[i];
if (!(os.conn == C_VERIFY_S || os.conn == C_VERIFY_T)) {
/* for verify runs, we don't update uuids here,
* so there would be nothing to report. */
drbd_uuid_set_bm(mdev, 0UL);
drbd_print_uuids(mdev, "updated UUIDs");
if (mdev->p_uuid) {
/* Now the two UUID sets are equal, update what we
* know of the peer. */
int i;
for (i = UI_CURRENT ; i <= UI_HISTORY_END ; i++)
mdev->p_uuid[i] = mdev->ldev->md.uuid[i];
}
}
}
@ -905,15 +892,11 @@ out:
mdev->rs_total = 0;
mdev->rs_failed = 0;
mdev->rs_paused = 0;
mdev->ov_start_sector = 0;
if (verify_done)
mdev->ov_start_sector = 0;
drbd_md_sync(mdev);
if (test_and_clear_bit(WRITE_BM_AFTER_RESYNC, &mdev->flags)) {
dev_info(DEV, "Writing the whole bitmap\n");
drbd_queue_bitmap_io(mdev, &drbd_bm_write, NULL, "write from resync_finished");
}
if (khelper_cmd)
drbd_khelper(mdev, khelper_cmd);
@ -994,7 +977,9 @@ int w_e_end_rsdata_req(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
put_ldev(mdev);
}
if (likely((e->flags & EE_WAS_ERROR) == 0)) {
if (mdev->state.conn == C_AHEAD) {
ok = drbd_send_ack(mdev, P_RS_CANCEL, e);
} else if (likely((e->flags & EE_WAS_ERROR) == 0)) {
if (likely(mdev->state.pdsk >= D_INCONSISTENT)) {
inc_rs_pending(mdev);
ok = drbd_send_block(mdev, P_RS_DATA_REPLY, e);
@ -1096,25 +1081,27 @@ int w_e_end_ov_req(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
if (unlikely(cancel))
goto out;
if (unlikely((e->flags & EE_WAS_ERROR) != 0))
goto out;
digest_size = crypto_hash_digestsize(mdev->verify_tfm);
/* FIXME if this allocation fails, online verify will not terminate! */
digest = kmalloc(digest_size, GFP_NOIO);
if (digest) {
drbd_csum_ee(mdev, mdev->verify_tfm, e, digest);
inc_rs_pending(mdev);
ok = drbd_send_drequest_csum(mdev, e->sector, e->size,
digest, digest_size, P_OV_REPLY);
if (!ok)
dec_rs_pending(mdev);
kfree(digest);
if (!digest) {
ok = 0; /* terminate the connection in case the allocation failed */
goto out;
}
if (likely(!(e->flags & EE_WAS_ERROR)))
drbd_csum_ee(mdev, mdev->verify_tfm, e, digest);
else
memset(digest, 0, digest_size);
inc_rs_pending(mdev);
ok = drbd_send_drequest_csum(mdev, e->sector, e->size,
digest, digest_size, P_OV_REPLY);
if (!ok)
dec_rs_pending(mdev);
kfree(digest);
out:
drbd_free_ee(mdev, e);
dec_unacked(mdev);
return ok;
@ -1129,7 +1116,6 @@ void drbd_ov_oos_found(struct drbd_conf *mdev, sector_t sector, int size)
mdev->ov_last_oos_size = size>>9;
}
drbd_set_out_of_sync(mdev, sector, size);
set_bit(WRITE_BM_AFTER_RESYNC, &mdev->flags);
}
int w_e_end_ov_reply(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
@ -1165,10 +1151,6 @@ int w_e_end_ov_reply(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
eq = !memcmp(digest, di->digest, digest_size);
kfree(digest);
}
} else {
ok = drbd_send_ack(mdev, P_NEG_RS_DREPLY, e);
if (__ratelimit(&drbd_ratelimit_state))
dev_err(DEV, "Sending NegDReply. I guess it gets messy.\n");
}
dec_unacked(mdev);
@ -1182,7 +1164,13 @@ int w_e_end_ov_reply(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
drbd_free_ee(mdev, e);
if (--mdev->ov_left == 0) {
--mdev->ov_left;
/* let's advance progress step marks only for every other megabyte */
if ((mdev->ov_left & 0x200) == 0x200)
drbd_advance_rs_marks(mdev, mdev->ov_left);
if (mdev->ov_left == 0) {
ov_oos_print(mdev);
drbd_resync_finished(mdev);
}
@ -1235,6 +1223,22 @@ int w_send_write_hint(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
return drbd_send_short_cmd(mdev, P_UNPLUG_REMOTE);
}
int w_send_oos(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
{
struct drbd_request *req = container_of(w, struct drbd_request, w);
int ok;
if (unlikely(cancel)) {
req_mod(req, send_canceled);
return 1;
}
ok = drbd_send_oos(mdev, req);
req_mod(req, oos_handed_to_network);
return ok;
}
/**
* w_send_dblock() - Worker callback to send a P_DATA packet in order to mirror a write request
* @mdev: DRBD device.
@ -1430,6 +1434,17 @@ int drbd_alter_sa(struct drbd_conf *mdev, int na)
return retcode;
}
void drbd_rs_controller_reset(struct drbd_conf *mdev)
{
atomic_set(&mdev->rs_sect_in, 0);
atomic_set(&mdev->rs_sect_ev, 0);
mdev->rs_in_flight = 0;
mdev->rs_planed = 0;
spin_lock(&mdev->peer_seq_lock);
fifo_set(&mdev->rs_plan_s, 0);
spin_unlock(&mdev->peer_seq_lock);
}
/**
* drbd_start_resync() - Start the resync process
* @mdev: DRBD device.
@ -1443,13 +1458,18 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
union drbd_state ns;
int r;
if (mdev->state.conn >= C_SYNC_SOURCE) {
if (mdev->state.conn >= C_SYNC_SOURCE && mdev->state.conn < C_AHEAD) {
dev_err(DEV, "Resync already running!\n");
return;
}
/* In case a previous resync run was aborted by an IO error/detach on the peer. */
drbd_rs_cancel_all(mdev);
if (mdev->state.conn < C_AHEAD) {
/* In case a previous resync run was aborted by an IO error/detach on the peer. */
drbd_rs_cancel_all(mdev);
/* This should be done when we abort the resync. We definitely do not
want to have this for connections going back and forth between
Ahead/Behind and SyncSource/SyncTarget */
}
if (side == C_SYNC_TARGET) {
/* Since application IO was locked out during C_WF_BITMAP_T and
@ -1463,6 +1483,20 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
drbd_force_state(mdev, NS(conn, C_DISCONNECTING));
return;
}
} else /* C_SYNC_SOURCE */ {
r = drbd_khelper(mdev, "before-resync-source");
r = (r >> 8) & 0xff;
if (r > 0) {
if (r == 3) {
dev_info(DEV, "before-resync-source handler returned %d, "
"ignoring. Old userland tools?", r);
} else {
dev_info(DEV, "before-resync-source handler returned %d, "
"dropping connection.\n", r);
drbd_force_state(mdev, NS(conn, C_DISCONNECTING));
return;
}
}
}
drbd_state_lock(mdev);
@ -1472,18 +1506,6 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
return;
}
if (side == C_SYNC_TARGET) {
mdev->bm_resync_fo = 0;
} else /* side == C_SYNC_SOURCE */ {
u64 uuid;
get_random_bytes(&uuid, sizeof(u64));
drbd_uuid_set(mdev, UI_BITMAP, uuid);
drbd_send_sync_uuid(mdev, uuid);
D_ASSERT(mdev->state.disk == D_UP_TO_DATE);
}
write_lock_irq(&global_state_lock);
ns = mdev->state;
@ -1521,13 +1543,24 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
_drbd_pause_after(mdev);
}
write_unlock_irq(&global_state_lock);
put_ldev(mdev);
if (r == SS_SUCCESS) {
dev_info(DEV, "Began resync as %s (will sync %lu KB [%lu bits set]).\n",
drbd_conn_str(ns.conn),
(unsigned long) mdev->rs_total << (BM_BLOCK_SHIFT-10),
(unsigned long) mdev->rs_total);
if (side == C_SYNC_TARGET)
mdev->bm_resync_fo = 0;
/* Since protocol 96, we must serialize drbd_gen_and_send_sync_uuid
* with w_send_oos, or the sync target will get confused as to
* how much bits to resync. We cannot do that always, because for an
* empty resync and protocol < 95, we need to do it here, as we call
* drbd_resync_finished from here in that case.
* We drbd_gen_and_send_sync_uuid here for protocol < 96,
* and from after_state_ch otherwise. */
if (side == C_SYNC_SOURCE && mdev->agreed_pro_version < 96)
drbd_gen_and_send_sync_uuid(mdev);
if (mdev->agreed_pro_version < 95 && mdev->rs_total == 0) {
/* This still has a race (about when exactly the peers
@ -1547,13 +1580,7 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
drbd_resync_finished(mdev);
}
atomic_set(&mdev->rs_sect_in, 0);
atomic_set(&mdev->rs_sect_ev, 0);
mdev->rs_in_flight = 0;
mdev->rs_planed = 0;
spin_lock(&mdev->peer_seq_lock);
fifo_set(&mdev->rs_plan_s, 0);
spin_unlock(&mdev->peer_seq_lock);
drbd_rs_controller_reset(mdev);
/* ns.conn may already be != mdev->state.conn,
* we may have been paused in between, or become paused until
* the timer triggers.
@ -1563,6 +1590,7 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
drbd_md_sync(mdev);
}
put_ldev(mdev);
drbd_state_unlock(mdev);
}

2
drivers/block/drbd/drbd_wrappers.h
View File

@ -39,7 +39,7 @@ static inline void drbd_generic_make_request(struct drbd_conf *mdev,
return;
}
if (FAULT_ACTIVE(mdev, fault_type))
if (drbd_insert_fault(mdev, fault_type))
bio_endio(bio, -EIO);
else
generic_make_request(bio);

23
include/linux/drbd.h
View File

@ -53,10 +53,10 @@
extern const char *drbd_buildtag(void);
#define REL_VERSION "8.3.9"
#define REL_VERSION "8.3.10"
#define API_VERSION 88
#define PRO_VERSION_MIN 86
#define PRO_VERSION_MAX 95
#define PRO_VERSION_MAX 96
enum drbd_io_error_p {
@ -96,8 +96,14 @@ enum drbd_on_no_data {
OND_SUSPEND_IO
};
enum drbd_on_congestion {
OC_BLOCK,
OC_PULL_AHEAD,
OC_DISCONNECT,
};
/* KEEP the order, do not delete or insert. Only append. */
enum drbd_ret_codes {
enum drbd_ret_code {
ERR_CODE_BASE = 100,
NO_ERROR = 101,
ERR_LOCAL_ADDR = 102,
@ -146,6 +152,9 @@ enum drbd_ret_codes {
ERR_PERM = 152,
ERR_NEED_APV_93 = 153,
ERR_STONITH_AND_PROT_A = 154,
ERR_CONG_NOT_PROTO_A = 155,
ERR_PIC_AFTER_DEP = 156,
ERR_PIC_PEER_DEP = 157,
/* insert new ones above this line */
AFTER_LAST_ERR_CODE
@ -199,6 +208,10 @@ enum drbd_conns {
C_VERIFY_T,
C_PAUSED_SYNC_S,
C_PAUSED_SYNC_T,
C_AHEAD,
C_BEHIND,
C_MASK = 31
};
@ -259,7 +272,7 @@ union drbd_state {
unsigned int i;
};
enum drbd_state_ret_codes {
enum drbd_state_rv {
SS_CW_NO_NEED = 4,
SS_CW_SUCCESS = 3,
SS_NOTHING_TO_DO = 2,
@ -290,7 +303,7 @@ enum drbd_state_ret_codes {
extern const char *drbd_conn_str(enum drbd_conns);
extern const char *drbd_role_str(enum drbd_role);
extern const char *drbd_disk_str(enum drbd_disk_state);
extern const char *drbd_set_st_err_str(enum drbd_state_ret_codes);
extern const char *drbd_set_st_err_str(enum drbd_state_rv);
#define SHARED_SECRET_MAX 64

12
include/linux/drbd_limits.h
View File

@ -16,7 +16,8 @@
#define DEBUG_RANGE_CHECK 0
#define DRBD_MINOR_COUNT_MIN 1
#define DRBD_MINOR_COUNT_MAX 255
#define DRBD_MINOR_COUNT_MAX 256
#define DRBD_MINOR_COUNT_DEF 32
#define DRBD_DIALOG_REFRESH_MIN 0
#define DRBD_DIALOG_REFRESH_MAX 600
@ -129,6 +130,7 @@
#define DRBD_AFTER_SB_2P_DEF ASB_DISCONNECT
#define DRBD_RR_CONFLICT_DEF ASB_DISCONNECT
#define DRBD_ON_NO_DATA_DEF OND_IO_ERROR
#define DRBD_ON_CONGESTION_DEF OC_BLOCK
#define DRBD_MAX_BIO_BVECS_MIN 0
#define DRBD_MAX_BIO_BVECS_MAX 128
@ -154,5 +156,13 @@
#define DRBD_C_MIN_RATE_MAX (4 << 20)
#define DRBD_C_MIN_RATE_DEF 4096
#define DRBD_CONG_FILL_MIN 0
#define DRBD_CONG_FILL_MAX (10<<21) /* 10GByte in sectors */
#define DRBD_CONG_FILL_DEF 0
#define DRBD_CONG_EXTENTS_MIN DRBD_AL_EXTENTS_MIN
#define DRBD_CONG_EXTENTS_MAX DRBD_AL_EXTENTS_MAX
#define DRBD_CONG_EXTENTS_DEF DRBD_AL_EXTENTS_DEF
#undef RANGE
#endif

13
include/linux/drbd_nl.h
View File

@ -56,6 +56,9 @@ NL_PACKET(net_conf, 5,
NL_INTEGER( 39, T_MAY_IGNORE, rr_conflict)
NL_INTEGER( 40, T_MAY_IGNORE, ping_timeo)
NL_INTEGER( 67, T_MAY_IGNORE, rcvbuf_size)
NL_INTEGER( 81, T_MAY_IGNORE, on_congestion)
NL_INTEGER( 82, T_MAY_IGNORE, cong_fill)
NL_INTEGER( 83, T_MAY_IGNORE, cong_extents)
/* 59 addr_family was available in GIT, never released */
NL_BIT( 60, T_MANDATORY, mind_af)
NL_BIT( 27, T_MAY_IGNORE, want_lose)
@ -66,7 +69,9 @@ NL_PACKET(net_conf, 5,
NL_BIT( 70, T_MANDATORY, dry_run)
)
NL_PACKET(disconnect, 6, )
NL_PACKET(disconnect, 6,
NL_BIT( 84, T_MAY_IGNORE, force)
)
NL_PACKET(resize, 7,
NL_INT64( 29, T_MAY_IGNORE, resize_size)
@ -143,9 +148,13 @@ NL_PACKET(new_c_uuid, 26,
NL_BIT( 63, T_MANDATORY, clear_bm)
)
#ifdef NL_RESPONSE
NL_RESPONSE(return_code_only, 27)
#endif
#undef NL_PACKET
#undef NL_INTEGER
#undef NL_INT64
#undef NL_BIT
#undef NL_STRING
#undef NL_RESPONSE

1
include/linux/drbd_tag_magic.h
View File

@ -7,6 +7,7 @@
/* declare packet_type enums */
enum packet_types {
#define NL_PACKET(name, number, fields) P_ ## name = number,
#define NL_RESPONSE(name, number) P_ ## name = number,
#define NL_INTEGER(pn, pr, member)
#define NL_INT64(pn, pr, member)
#define NL_BIT(pn, pr, member)