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Merge branch 'for-3.5/drivers' of git://git.kernel.dk/linux-block

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Pull block driver updates from Jens Axboe:
 "Here are the driver related changes for 3.5.  It contains:

   - The floppy changes from Jiri.  Jiri is now also marked as the
     maintainer of floppy.c, I shall be publically branding his forehead
     with red hot iron at the next opportune moment.

   - A batch of drbd updates and fixes from the linbit crew, as well as
     fixes from others.

   - Two small fixes for xen-blkfront courtesy of Jan."

* 'for-3.5/drivers' of git://git.kernel.dk/linux-block: (70 commits)
  floppy: take over maintainership
  floppy: remove floppy-specific O_EXCL handling
  floppy: convert to delayed work and single-thread wq
  xen-blkfront: module exit handling adjustments
  xen-blkfront: properly name all devices
  drbd: grammar fix in log message
  drbd: check MODULE for THIS_MODULE
  drbd: Restore the request restart logic
  drbd: introduce a bio_set to allocate housekeeping bios from
  drbd: remove unused define
  drbd: bm_page_async_io: properly initialize page->private
  drbd: use the newly introduced page pool for bitmap IO
  drbd: add page pool to be used for meta data IO
  drbd: allow bitmap to change during writeout from resync_finished
  drbd: fix race between drbdadm invalidate/verify and finishing resync
  drbd: fix resend/resubmit of frozen IO
  drbd: Ensure that data_size is not 0 before using data_size-1 as index
  drbd: Delay/reject other state changes while establishing a connection
  drbd: move put_ldev from __req_mod() to the endio callback
  drbd: fix WRITE_ACKED_BY_PEER_AND_SIS to not set RQ_NET_DONE
  ...
This commit is contained in:
Linus Torvalds 2012-05-30 09:05:47 -07:00
commit a70f35af4e
16 changed files with 858 additions and 387 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
MAINTAINERS
View File

@ -2818,6 +2818,12 @@ F: Documentation/firmware_class/
F: drivers/base/firmware*.c
F: include/linux/firmware.h
FLOPPY DRIVER
M: Jiri Kosina <jkosina@suse.cz>
T: git git://git.kernel.org/pub/scm/linux/kernel/git/jikos/floppy.git
S: Odd fixes
F: drivers/block/floppy.c
FPU EMULATOR
M: Bill Metzenthen <billm@melbpc.org.au>
W: http://floatingpoint.sourceforge.net/emulator/index.html

102
drivers/block/drbd/drbd_actlog.c
View File

@ -65,39 +65,80 @@ struct drbd_atodb_wait {
int w_al_write_transaction(struct drbd_conf *, struct drbd_work *, int);
void *drbd_md_get_buffer(struct drbd_conf *mdev)
{
int r;
wait_event(mdev->misc_wait,
(r = atomic_cmpxchg(&mdev->md_io_in_use, 0, 1)) == 0 ||
mdev->state.disk <= D_FAILED);
return r ? NULL : page_address(mdev->md_io_page);
}
void drbd_md_put_buffer(struct drbd_conf *mdev)
{
if (atomic_dec_and_test(&mdev->md_io_in_use))
wake_up(&mdev->misc_wait);
}
static bool md_io_allowed(struct drbd_conf *mdev)
{
enum drbd_disk_state ds = mdev->state.disk;
return ds >= D_NEGOTIATING || ds == D_ATTACHING;
}
void wait_until_done_or_disk_failure(struct drbd_conf *mdev, struct drbd_backing_dev *bdev,
unsigned int *done)
{
long dt = bdev->dc.disk_timeout * HZ / 10;
if (dt == 0)
dt = MAX_SCHEDULE_TIMEOUT;
dt = wait_event_timeout(mdev->misc_wait, *done || !md_io_allowed(mdev), dt);
if (dt == 0)
dev_err(DEV, "meta-data IO operation timed out\n");
}
static int _drbd_md_sync_page_io(struct drbd_conf *mdev,
struct drbd_backing_dev *bdev,
struct page *page, sector_t sector,
int rw, int size)
{
struct bio *bio;
struct drbd_md_io md_io;
int ok;
md_io.mdev = mdev;
init_completion(&md_io.event);
md_io.error = 0;
mdev->md_io.done = 0;
mdev->md_io.error = -ENODEV;
if ((rw & WRITE) && !test_bit(MD_NO_FUA, &mdev->flags))
rw |= REQ_FUA | REQ_FLUSH;
rw |= REQ_SYNC;
bio = bio_alloc(GFP_NOIO, 1);
bio = bio_alloc_drbd(GFP_NOIO);
bio->bi_bdev = bdev->md_bdev;
bio->bi_sector = sector;
ok = (bio_add_page(bio, page, size, 0) == size);
if (!ok)
goto out;
bio->bi_private = &md_io;
bio->bi_private = &mdev->md_io;
bio->bi_end_io = drbd_md_io_complete;
bio->bi_rw = rw;
if (!get_ldev_if_state(mdev, D_ATTACHING)) { /* Corresponding put_ldev in drbd_md_io_complete() */
dev_err(DEV, "ASSERT FAILED: get_ldev_if_state() == 1 in _drbd_md_sync_page_io()\n");
ok = 0;
goto out;
}
bio_get(bio); /* one bio_put() is in the completion handler */
atomic_inc(&mdev->md_io_in_use); /* drbd_md_put_buffer() is in the completion handler */
if (drbd_insert_fault(mdev, (rw & WRITE) ? DRBD_FAULT_MD_WR : DRBD_FAULT_MD_RD))
bio_endio(bio, -EIO);
else
submit_bio(rw, bio);
wait_for_completion(&md_io.event);
ok = bio_flagged(bio, BIO_UPTODATE) && md_io.error == 0;
wait_until_done_or_disk_failure(mdev, bdev, &mdev->md_io.done);
ok = bio_flagged(bio, BIO_UPTODATE) && mdev->md_io.error == 0;
out:
bio_put(bio);
@ -111,7 +152,7 @@ int drbd_md_sync_page_io(struct drbd_conf *mdev, struct drbd_backing_dev *bdev,
int offset = 0;
struct page *iop = mdev->md_io_page;
D_ASSERT(mutex_is_locked(&mdev->md_io_mutex));
D_ASSERT(atomic_read(&mdev->md_io_in_use) == 1);
BUG_ON(!bdev->md_bdev);
@ -328,8 +369,13 @@ w_al_write_transaction(struct drbd_conf *mdev, struct drbd_work *w, int unused)
return 1;
}
mutex_lock(&mdev->md_io_mutex); /* protects md_io_buffer, al_tr_cycle, ... */
buffer = (struct al_transaction *)page_address(mdev->md_io_page);
buffer = drbd_md_get_buffer(mdev); /* protects md_io_buffer, al_tr_cycle, ... */
if (!buffer) {
dev_err(DEV, "disk failed while waiting for md_io buffer\n");
complete(&((struct update_al_work *)w)->event);
put_ldev(mdev);
return 1;
}
buffer->magic = __constant_cpu_to_be32(DRBD_MAGIC);
buffer->tr_number = cpu_to_be32(mdev->al_tr_number);
@ -374,7 +420,7 @@ w_al_write_transaction(struct drbd_conf *mdev, struct drbd_work *w, int unused)
D_ASSERT(mdev->al_tr_pos < MD_AL_MAX_SIZE);
mdev->al_tr_number++;
mutex_unlock(&mdev->md_io_mutex);
drbd_md_put_buffer(mdev);
complete(&((struct update_al_work *)w)->event);
put_ldev(mdev);
@ -443,8 +489,9 @@ int drbd_al_read_log(struct drbd_conf *mdev, struct drbd_backing_dev *bdev)
/* lock out all other meta data io for now,
* and make sure the page is mapped.
*/
mutex_lock(&mdev->md_io_mutex);
buffer = page_address(mdev->md_io_page);
buffer = drbd_md_get_buffer(mdev);
if (!buffer)
return 0;
/* Find the valid transaction in the log */
for (i = 0; i <= mx; i++) {
@ -452,7 +499,7 @@ int drbd_al_read_log(struct drbd_conf *mdev, struct drbd_backing_dev *bdev)
if (rv == 0)
continue;
if (rv == -1) {
mutex_unlock(&mdev->md_io_mutex);
drbd_md_put_buffer(mdev);
return 0;
}
cnr = be32_to_cpu(buffer->tr_number);
@ -478,7 +525,7 @@ int drbd_al_read_log(struct drbd_conf *mdev, struct drbd_backing_dev *bdev)
if (!found_valid) {
dev_warn(DEV, "No usable activity log found.\n");
mutex_unlock(&mdev->md_io_mutex);
drbd_md_put_buffer(mdev);
return 1;
}
@ -493,7 +540,7 @@ int drbd_al_read_log(struct drbd_conf *mdev, struct drbd_backing_dev *bdev)
rv = drbd_al_read_tr(mdev, bdev, buffer, i);
ERR_IF(rv == 0) goto cancel;
if (rv == -1) {
mutex_unlock(&mdev->md_io_mutex);
drbd_md_put_buffer(mdev);
return 0;
}
@ -534,7 +581,7 @@ cancel:
mdev->al_tr_pos = 0;
/* ok, we are done with it */
mutex_unlock(&mdev->md_io_mutex);
drbd_md_put_buffer(mdev);
dev_info(DEV, "Found %d transactions (%d active extents) in activity log.\n",
transactions, active_extents);
@ -671,16 +718,20 @@ static void drbd_try_clear_on_disk_bm(struct drbd_conf *mdev, sector_t sector,
else
ext->rs_failed += count;
if (ext->rs_left < ext->rs_failed) {
dev_err(DEV, "BAD! sector=%llus enr=%u rs_left=%d "
"rs_failed=%d count=%d\n",
dev_warn(DEV, "BAD! sector=%llus enr=%u rs_left=%d "
"rs_failed=%d count=%d cstate=%s\n",
(unsigned long long)sector,
ext->lce.lc_number, ext->rs_left,
ext->rs_failed, count);
dump_stack();
ext->rs_failed, count,
drbd_conn_str(mdev->state.conn));
lc_put(mdev->resync, &ext->lce);
drbd_force_state(mdev, NS(conn, C_DISCONNECTING));
return;
/* We don't expect to be able to clear more bits
* than have been set when we originally counted
* the set bits to cache that value in ext->rs_left.
* Whatever the reason (disconnect during resync,
* delayed local completion of an application write),
* try to fix it up by recounting here. */
ext->rs_left = drbd_bm_e_weight(mdev, enr);
}
} else {
/* Normally this element should be in the cache,
@ -1192,6 +1243,7 @@ int drbd_rs_del_all(struct drbd_conf *mdev)
put_ldev(mdev);
}
spin_unlock_irq(&mdev->al_lock);
wake_up(&mdev->al_wait);
return 0;
}

148
drivers/block/drbd/drbd_bitmap.c
View File

@ -205,7 +205,7 @@ void drbd_bm_unlock(struct drbd_conf *mdev)
static void bm_store_page_idx(struct page *page, unsigned long idx)
{
BUG_ON(0 != (idx & ~BM_PAGE_IDX_MASK));
page_private(page) |= idx;
set_page_private(page, idx);
}
static unsigned long bm_page_to_idx(struct page *page)
@ -886,12 +886,21 @@ void drbd_bm_clear_all(struct drbd_conf *mdev)
struct bm_aio_ctx {
struct drbd_conf *mdev;
atomic_t in_flight;
struct completion done;
unsigned int done;
unsigned flags;
#define BM_AIO_COPY_PAGES 1
int error;
struct kref kref;
};
static void bm_aio_ctx_destroy(struct kref *kref)
{
struct bm_aio_ctx *ctx = container_of(kref, struct bm_aio_ctx, kref);
put_ldev(ctx->mdev);
kfree(ctx);
}
/* bv_page may be a copy, or may be the original */
static void bm_async_io_complete(struct bio *bio, int error)
{
@ -930,20 +939,21 @@ static void bm_async_io_complete(struct bio *bio, int error)
bm_page_unlock_io(mdev, idx);
/* FIXME give back to page pool */
if (ctx->flags & BM_AIO_COPY_PAGES)
put_page(bio->bi_io_vec[0].bv_page);
mempool_free(bio->bi_io_vec[0].bv_page, drbd_md_io_page_pool);
bio_put(bio);
if (atomic_dec_and_test(&ctx->in_flight))
complete(&ctx->done);
if (atomic_dec_and_test(&ctx->in_flight)) {
ctx->done = 1;
wake_up(&mdev->misc_wait);
kref_put(&ctx->kref, &bm_aio_ctx_destroy);
}
}
static void bm_page_io_async(struct bm_aio_ctx *ctx, int page_nr, int rw) __must_hold(local)
{
/* we are process context. we always get a bio */
struct bio *bio = bio_alloc(GFP_KERNEL, 1);
struct bio *bio = bio_alloc_drbd(GFP_NOIO);
struct drbd_conf *mdev = ctx->mdev;
struct drbd_bitmap *b = mdev->bitmap;
struct page *page;
@ -966,10 +976,8 @@ static void bm_page_io_async(struct bm_aio_ctx *ctx, int page_nr, int rw) __must
bm_set_page_unchanged(b->bm_pages[page_nr]);
if (ctx->flags & BM_AIO_COPY_PAGES) {
/* FIXME alloc_page is good enough for now, but actually needs
* to use pre-allocated page pool */
void *src, *dest;
page = alloc_page(__GFP_HIGHMEM|__GFP_WAIT);
page = mempool_alloc(drbd_md_io_page_pool, __GFP_HIGHMEM|__GFP_WAIT);
dest = kmap_atomic(page);
src = kmap_atomic(b->bm_pages[page_nr]);
memcpy(dest, src, PAGE_SIZE);
@ -981,6 +989,8 @@ static void bm_page_io_async(struct bm_aio_ctx *ctx, int page_nr, int rw) __must
bio->bi_bdev = mdev->ldev->md_bdev;
bio->bi_sector = on_disk_sector;
/* bio_add_page of a single page to an empty bio will always succeed,
* according to api. Do we want to assert that? */
bio_add_page(bio, page, len, 0);
bio->bi_private = ctx;
bio->bi_end_io = bm_async_io_complete;
@ -999,14 +1009,9 @@ static void bm_page_io_async(struct bm_aio_ctx *ctx, int page_nr, int rw) __must
/*
* bm_rw: read/write the whole bitmap from/to its on disk location.
*/
static int bm_rw(struct drbd_conf *mdev, int rw, unsigned lazy_writeout_upper_idx) __must_hold(local)
static int bm_rw(struct drbd_conf *mdev, int rw, unsigned flags, unsigned lazy_writeout_upper_idx) __must_hold(local)
{
struct bm_aio_ctx ctx = {
.mdev = mdev,
.in_flight = ATOMIC_INIT(1),
.done = COMPLETION_INITIALIZER_ONSTACK(ctx.done),
.flags = lazy_writeout_upper_idx ? BM_AIO_COPY_PAGES : 0,
};
struct bm_aio_ctx *ctx;
struct drbd_bitmap *b = mdev->bitmap;
int num_pages, i, count = 0;
unsigned long now;
@ -1021,7 +1026,27 @@ static int bm_rw(struct drbd_conf *mdev, int rw, unsigned lazy_writeout_upper_id
* For lazy writeout, we don't care for ongoing changes to the bitmap,
* as we submit copies of pages anyways.
*/
if (!ctx.flags)
ctx = kmalloc(sizeof(struct bm_aio_ctx), GFP_NOIO);
if (!ctx)
return -ENOMEM;
*ctx = (struct bm_aio_ctx) {
.mdev = mdev,
.in_flight = ATOMIC_INIT(1),
.done = 0,
.flags = flags,
.error = 0,
.kref = { ATOMIC_INIT(2) },
};
if (!get_ldev_if_state(mdev, D_ATTACHING)) { /* put is in bm_aio_ctx_destroy() */
dev_err(DEV, "ASSERT FAILED: get_ldev_if_state() == 1 in bm_rw()\n");
kfree(ctx);
return -ENODEV;
}
if (!ctx->flags)
WARN_ON(!(BM_LOCKED_MASK & b->bm_flags));
num_pages = b->bm_number_of_pages;
@ -1046,29 +1071,38 @@ static int bm_rw(struct drbd_conf *mdev, int rw, unsigned lazy_writeout_upper_id
continue;
}
}
atomic_inc(&ctx.in_flight);
bm_page_io_async(&ctx, i, rw);
atomic_inc(&ctx->in_flight);
bm_page_io_async(ctx, i, rw);
++count;
cond_resched();
}
/*
* We initialize ctx.in_flight to one to make sure bm_async_io_complete
* will not complete() early, and decrement / test it here. If there
* We initialize ctx->in_flight to one to make sure bm_async_io_complete
* will not set ctx->done early, and decrement / test it here. If there
* are still some bios in flight, we need to wait for them here.
* If all IO is done already (or nothing had been submitted), there is
* no need to wait. Still, we need to put the kref associated with the
* "in_flight reached zero, all done" event.
*/
if (!atomic_dec_and_test(&ctx.in_flight))
wait_for_completion(&ctx.done);
if (!atomic_dec_and_test(&ctx->in_flight))
wait_until_done_or_disk_failure(mdev, mdev->ldev, &ctx->done);
else
kref_put(&ctx->kref, &bm_aio_ctx_destroy);
dev_info(DEV, "bitmap %s of %u pages took %lu jiffies\n",
rw == WRITE ? "WRITE" : "READ",
count, jiffies - now);
if (ctx.error) {
if (ctx->error) {
dev_alert(DEV, "we had at least one MD IO ERROR during bitmap IO\n");
drbd_chk_io_error(mdev, 1, true);
err = -EIO; /* ctx.error ? */
err = -EIO; /* ctx->error ? */
}
if (atomic_read(&ctx->in_flight))
err = -EIO; /* Disk failed during IO... */
now = jiffies;
if (rw == WRITE) {
drbd_md_flush(mdev);
@ -1082,6 +1116,7 @@ static int bm_rw(struct drbd_conf *mdev, int rw, unsigned lazy_writeout_upper_id
dev_info(DEV, "%s (%lu bits) marked out-of-sync by on disk bit-map.\n",
ppsize(ppb, now << (BM_BLOCK_SHIFT-10)), now);
kref_put(&ctx->kref, &bm_aio_ctx_destroy);
return err;
}
@ -1091,7 +1126,7 @@ static int bm_rw(struct drbd_conf *mdev, int rw, unsigned lazy_writeout_upper_id
*/
int drbd_bm_read(struct drbd_conf *mdev) __must_hold(local)
{
return bm_rw(mdev, READ, 0);
return bm_rw(mdev, READ, 0, 0);
}
/**
@ -1102,7 +1137,7 @@ int drbd_bm_read(struct drbd_conf *mdev) __must_hold(local)
*/
int drbd_bm_write(struct drbd_conf *mdev) __must_hold(local)
{
return bm_rw(mdev, WRITE, 0);
return bm_rw(mdev, WRITE, 0, 0);
}
/**
@ -1112,7 +1147,23 @@ int drbd_bm_write(struct drbd_conf *mdev) __must_hold(local)
*/
int drbd_bm_write_lazy(struct drbd_conf *mdev, unsigned upper_idx) __must_hold(local)
{
return bm_rw(mdev, WRITE, upper_idx);
return bm_rw(mdev, WRITE, BM_AIO_COPY_PAGES, upper_idx);
}
/**
* drbd_bm_write_copy_pages() - Write the whole bitmap to its on disk location.
* @mdev: DRBD device.
*
* Will only write pages that have changed since last IO.
* In contrast to drbd_bm_write(), this will copy the bitmap pages
* to temporary writeout pages. It is intended to trigger a full write-out
* while still allowing the bitmap to change, for example if a resync or online
* verify is aborted due to a failed peer disk, while local IO continues, or
* pending resync acks are still being processed.
*/
int drbd_bm_write_copy_pages(struct drbd_conf *mdev) __must_hold(local)
{
return bm_rw(mdev, WRITE, BM_AIO_COPY_PAGES, 0);
}
@ -1130,28 +1181,45 @@ int drbd_bm_write_lazy(struct drbd_conf *mdev, unsigned upper_idx) __must_hold(l
*/
int drbd_bm_write_page(struct drbd_conf *mdev, unsigned int idx) __must_hold(local)
{
struct bm_aio_ctx ctx = {
.mdev = mdev,
.in_flight = ATOMIC_INIT(1),
.done = COMPLETION_INITIALIZER_ONSTACK(ctx.done),
.flags = BM_AIO_COPY_PAGES,
};
struct bm_aio_ctx *ctx;
int err;
if (bm_test_page_unchanged(mdev->bitmap->bm_pages[idx])) {
dynamic_dev_dbg(DEV, "skipped bm page write for idx %u\n", idx);
return 0;
}
bm_page_io_async(&ctx, idx, WRITE_SYNC);
wait_for_completion(&ctx.done);
ctx = kmalloc(sizeof(struct bm_aio_ctx), GFP_NOIO);
if (!ctx)
return -ENOMEM;
if (ctx.error)
*ctx = (struct bm_aio_ctx) {
.mdev = mdev,
.in_flight = ATOMIC_INIT(1),
.done = 0,
.flags = BM_AIO_COPY_PAGES,
.error = 0,
.kref = { ATOMIC_INIT(2) },
};
if (!get_ldev_if_state(mdev, D_ATTACHING)) { /* put is in bm_aio_ctx_destroy() */
dev_err(DEV, "ASSERT FAILED: get_ldev_if_state() == 1 in drbd_bm_write_page()\n");
kfree(ctx);
return -ENODEV;
}
bm_page_io_async(ctx, idx, WRITE_SYNC);
wait_until_done_or_disk_failure(mdev, mdev->ldev, &ctx->done);
if (ctx->error)
drbd_chk_io_error(mdev, 1, true);
/* that should force detach, so the in memory bitmap will be
* gone in a moment as well. */
mdev->bm_writ_cnt++;
return ctx.error;
err = atomic_read(&ctx->in_flight) ? -EIO : ctx->error;
kref_put(&ctx->kref, &bm_aio_ctx_destroy);
return err;
}
/* NOTE

90
drivers/block/drbd/drbd_int.h
View File

@ -712,7 +712,6 @@ struct drbd_request {
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() */
int seq_num;
unsigned long start_time;
};
@ -851,6 +850,7 @@ enum {
NEW_CUR_UUID, /* Create new current UUID when thawing IO */
AL_SUSPENDED, /* Activity logging is currently suspended. */
AHEAD_TO_SYNC_SOURCE, /* Ahead -> SyncSource queued */
STATE_SENT, /* Do not change state/UUIDs while this is set */
};
struct drbd_bitmap; /* opaque for drbd_conf */
@ -862,31 +862,30 @@ enum bm_flag {
BM_P_VMALLOCED = 0x10000, /* internal use only, will be masked out */
/* currently locked for bulk operation */
BM_LOCKED_MASK = 0x7,
BM_LOCKED_MASK = 0xf,
/* in detail, that is: */
BM_DONT_CLEAR = 0x1,
BM_DONT_SET = 0x2,
BM_DONT_TEST = 0x4,
/* so we can mark it locked for bulk operation,
* and still allow all non-bulk operations */
BM_IS_LOCKED = 0x8,
/* (test bit, count bit) allowed (common case) */
BM_LOCKED_TEST_ALLOWED = 0x3,
BM_LOCKED_TEST_ALLOWED = BM_DONT_CLEAR | BM_DONT_SET | BM_IS_LOCKED,
/* 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,
BM_LOCKED_SET_ALLOWED = BM_DONT_CLEAR | BM_IS_LOCKED,
/* clear is not expected while bitmap is locked for bulk operation */
/* for drbd_bm_write_copy_pages, everything is allowed,
* only concurrent bulk operations are locked out. */
BM_LOCKED_CHANGE_ALLOWED = BM_IS_LOCKED,
};
/* TODO sort members for performance
* MAYBE group them further */
/* THINK maybe we actually want to use the default "event/%s" worker threads
* or similar in linux 2.6, which uses per cpu data and threads.
*/
struct drbd_work_queue {
struct list_head q;
struct semaphore s; /* producers up it, worker down()s it */
@ -938,8 +937,7 @@ struct drbd_backing_dev {
};
struct drbd_md_io {
struct drbd_conf *mdev;
struct completion event;
unsigned int done;
int error;
};
@ -1022,6 +1020,7 @@ struct drbd_conf {
struct drbd_tl_epoch *newest_tle;
struct drbd_tl_epoch *oldest_tle;
struct list_head out_of_sequence_requests;
struct list_head barrier_acked_requests;
struct hlist_head *tl_hash;
unsigned int tl_hash_s;
@ -1056,6 +1055,8 @@ struct drbd_conf {
struct crypto_hash *csums_tfm;
struct crypto_hash *verify_tfm;
unsigned long last_reattach_jif;
unsigned long last_reconnect_jif;
struct drbd_thread receiver;
struct drbd_thread worker;
struct drbd_thread asender;
@ -1094,7 +1095,8 @@ struct drbd_conf {
wait_queue_head_t ee_wait;
struct page *md_io_page; /* one page buffer for md_io */
struct page *md_io_tmpp; /* for logical_block_size != 512 */
struct mutex md_io_mutex; /* protects the md_io_buffer */
struct drbd_md_io md_io;
atomic_t md_io_in_use; /* protects the md_io, md_io_page and md_io_tmpp */
spinlock_t al_lock;
wait_queue_head_t al_wait;
struct lru_cache *act_log; /* activity log */
@ -1228,8 +1230,8 @@ extern int drbd_send_uuids(struct drbd_conf *mdev);
extern int drbd_send_uuids_skip_initial_sync(struct drbd_conf *mdev);
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);
extern int drbd_send_state(struct drbd_conf *mdev, union drbd_state s);
extern int drbd_send_current_state(struct drbd_conf *mdev);
extern int _drbd_send_cmd(struct drbd_conf *mdev, struct socket *sock,
enum drbd_packets cmd, struct p_header80 *h,
size_t size, unsigned msg_flags);
@ -1461,6 +1463,7 @@ extern int drbd_bm_e_weight(struct drbd_conf *mdev, unsigned long enr);
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 int drbd_bm_write_copy_pages(struct drbd_conf *mdev) __must_hold(local);
extern unsigned long drbd_bm_ALe_set_all(struct drbd_conf *mdev,
unsigned long al_enr);
extern size_t drbd_bm_words(struct drbd_conf *mdev);
@ -1493,11 +1496,38 @@ extern struct kmem_cache *drbd_al_ext_cache; /* activity log extents */
extern mempool_t *drbd_request_mempool;
extern mempool_t *drbd_ee_mempool;
extern struct page *drbd_pp_pool; /* drbd's page pool */
/* drbd's page pool, used to buffer data received from the peer,
* or data requested by the peer.
*
* This does not have an emergency reserve.
*
* When allocating from this pool, it first takes pages from the pool.
* Only if the pool is depleted will try to allocate from the system.
*
* The assumption is that pages taken from this pool will be processed,
* and given back, "quickly", and then can be recycled, so we can avoid
* frequent calls to alloc_page(), and still will be able to make progress even
* under memory pressure.
*/
extern struct page *drbd_pp_pool;
extern spinlock_t drbd_pp_lock;
extern int drbd_pp_vacant;
extern wait_queue_head_t drbd_pp_wait;
/* We also need a standard (emergency-reserve backed) page pool
* for meta data IO (activity log, bitmap).
* We can keep it global, as long as it is used as "N pages at a time".
* 128 should be plenty, currently we probably can get away with as few as 1.
*/
#define DRBD_MIN_POOL_PAGES 128
extern mempool_t *drbd_md_io_page_pool;
/* We also need to make sure we get a bio
* when we need it for housekeeping purposes */
extern struct bio_set *drbd_md_io_bio_set;
/* to allocate from that set */
extern struct bio *bio_alloc_drbd(gfp_t gfp_mask);
extern rwlock_t global_state_lock;
extern struct drbd_conf *drbd_new_device(unsigned int minor);
@ -1536,8 +1566,12 @@ extern void resume_next_sg(struct drbd_conf *mdev);
extern void suspend_other_sg(struct drbd_conf *mdev);
extern int drbd_resync_finished(struct drbd_conf *mdev);
/* maybe rather drbd_main.c ? */
extern void *drbd_md_get_buffer(struct drbd_conf *mdev);
extern void drbd_md_put_buffer(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);
struct drbd_backing_dev *bdev, sector_t sector, int rw);
extern void wait_until_done_or_disk_failure(struct drbd_conf *mdev, struct drbd_backing_dev *bdev,
unsigned int *done);
extern void drbd_ov_oos_found(struct drbd_conf*, sector_t, int);
extern void drbd_rs_controller_reset(struct drbd_conf *mdev);
@ -1754,19 +1788,6 @@ static inline struct page *page_chain_next(struct page *page)
#define page_chain_for_each_safe(page, n) \
for (; page && ({ n = page_chain_next(page); 1; }); page = n)
static inline int drbd_bio_has_active_page(struct bio *bio)
{
struct bio_vec *bvec;
int i;
__bio_for_each_segment(bvec, bio, i, 0) {
if (page_count(bvec->bv_page) > 1)
return 1;
}
return 0;
}
static inline int drbd_ee_has_active_page(struct drbd_epoch_entry *e)
{
struct page *page = e->pages;
@ -1777,7 +1798,6 @@ static inline int drbd_ee_has_active_page(struct drbd_epoch_entry *e)
return 0;
}
static inline void drbd_state_lock(struct drbd_conf *mdev)
{
wait_event(mdev->misc_wait,
@ -2230,7 +2250,7 @@ static inline void drbd_get_syncer_progress(struct drbd_conf *mdev,
* 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 int shift = mdev->rs_total > UINT_MAX ? 16 : 10;
unsigned long left = *bits_left >> shift;
unsigned long total = 1UL + (mdev->rs_total >> shift);
unsigned long tmp = 1000UL - left * 1000UL/total;
@ -2306,12 +2326,12 @@ static inline int drbd_state_is_stable(struct drbd_conf *mdev)
case D_OUTDATED:
case D_CONSISTENT:
case D_UP_TO_DATE:
case D_FAILED:
/* disk state is stable as well. */
break;
/* no new io accepted during tansitional states */
case D_ATTACHING:
case D_FAILED:
case D_NEGOTIATING:
case D_UNKNOWN:
case D_MASK:

349
drivers/block/drbd/drbd_main.c
View File

@ -139,6 +139,8 @@ struct kmem_cache *drbd_bm_ext_cache; /* bitmap extents */
struct kmem_cache *drbd_al_ext_cache; /* activity log extents */
mempool_t *drbd_request_mempool;
mempool_t *drbd_ee_mempool;
mempool_t *drbd_md_io_page_pool;
struct bio_set *drbd_md_io_bio_set;
/* I do not use a standard mempool, because:
1) I want to hand out the pre-allocated objects first.
@ -159,7 +161,24 @@ static const struct block_device_operations drbd_ops = {
.release = drbd_release,
};
#define ARRY_SIZE(A) (sizeof(A)/sizeof(A[0]))
static void bio_destructor_drbd(struct bio *bio)
{
bio_free(bio, drbd_md_io_bio_set);
}
struct bio *bio_alloc_drbd(gfp_t gfp_mask)
{
struct bio *bio;
if (!drbd_md_io_bio_set)
return bio_alloc(gfp_mask, 1);
bio = bio_alloc_bioset(gfp_mask, 1, drbd_md_io_bio_set);
if (!bio)
return NULL;
bio->bi_destructor = bio_destructor_drbd;
return bio;
}
#ifdef __CHECKER__
/* When checking with sparse, and this is an inline function, sparse will
@ -208,6 +227,7 @@ static int tl_init(struct drbd_conf *mdev)
mdev->oldest_tle = b;
mdev->newest_tle = b;
INIT_LIST_HEAD(&mdev->out_of_sequence_requests);
INIT_LIST_HEAD(&mdev->barrier_acked_requests);
mdev->tl_hash = NULL;
mdev->tl_hash_s = 0;
@ -246,9 +266,7 @@ void _tl_add_barrier(struct drbd_conf *mdev, struct drbd_tl_epoch *new)
new->n_writes = 0;
newest_before = mdev->newest_tle;
/* never send a barrier number == 0, because that is special-cased
* when using TCQ for our write ordering code */
new->br_number = (newest_before->br_number+1) ?: 1;
new->br_number = newest_before->br_number+1;
if (mdev->newest_tle != new) {
mdev->newest_tle->next = new;
mdev->newest_tle = new;
@ -311,7 +329,7 @@ void tl_release(struct drbd_conf *mdev, unsigned int barrier_nr,
These have been list_move'd to the out_of_sequence_requests list in
_req_mod(, barrier_acked) above.
*/
list_del_init(&b->requests);
list_splice_init(&b->requests, &mdev->barrier_acked_requests);
nob = b->next;
if (test_and_clear_bit(CREATE_BARRIER, &mdev->flags)) {
@ -411,6 +429,23 @@ static void _tl_restart(struct drbd_conf *mdev, enum drbd_req_event what)
b = tmp;
list_splice(&carry_reads, &b->requests);
}
/* Actions operating on the disk state, also want to work on
requests that got barrier acked. */
switch (what) {
case fail_frozen_disk_io:
case restart_frozen_disk_io:
list_for_each_safe(le, tle, &mdev->barrier_acked_requests) {
req = list_entry(le, struct drbd_request, tl_requests);
_req_mod(req, what);
}
case connection_lost_while_pending:
case resend:
break;
default:
dev_err(DEV, "what = %d in _tl_restart()\n", what);
}
}
@ -457,6 +492,38 @@ void tl_restart(struct drbd_conf *mdev, enum drbd_req_event what)
spin_unlock_irq(&mdev->req_lock);
}
/**
* tl_abort_disk_io() - Abort disk I/O for all requests for a certain mdev in the TL
* @mdev: DRBD device.
*/
void tl_abort_disk_io(struct drbd_conf *mdev)
{
struct drbd_tl_epoch *b;
struct list_head *le, *tle;
struct drbd_request *req;
spin_lock_irq(&mdev->req_lock);
b = mdev->oldest_tle;
while (b) {
list_for_each_safe(le, tle, &b->requests) {
req = list_entry(le, struct drbd_request, tl_requests);
if (!(req->rq_state & RQ_LOCAL_PENDING))
continue;
_req_mod(req, abort_disk_io);
}
b = b->next;
}
list_for_each_safe(le, tle, &mdev->barrier_acked_requests) {
req = list_entry(le, struct drbd_request, tl_requests);
if (!(req->rq_state & RQ_LOCAL_PENDING))
continue;
_req_mod(req, abort_disk_io);
}
spin_unlock_irq(&mdev->req_lock);
}
/**
* cl_wide_st_chg() - true if the state change is a cluster wide one
* @mdev: DRBD device.
@ -470,7 +537,7 @@ static int cl_wide_st_chg(struct drbd_conf *mdev,
((os.role != R_PRIMARY && ns.role == R_PRIMARY) ||
(os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) ||
(os.conn != C_STARTING_SYNC_S && ns.conn == C_STARTING_SYNC_S) ||
(os.disk != D_DISKLESS && ns.disk == D_DISKLESS))) ||
(os.disk != D_FAILED && ns.disk == D_FAILED))) ||
(os.conn >= C_CONNECTED && ns.conn == C_DISCONNECTING) ||
(os.conn == C_CONNECTED && ns.conn == C_VERIFY_S);
}
@ -509,8 +576,16 @@ static enum drbd_state_rv is_valid_state(struct drbd_conf *, union drbd_state);
static enum drbd_state_rv is_valid_state_transition(struct drbd_conf *,
union drbd_state,
union drbd_state);
enum sanitize_state_warnings {
NO_WARNING,
ABORTED_ONLINE_VERIFY,
ABORTED_RESYNC,
CONNECTION_LOST_NEGOTIATING,
IMPLICITLY_UPGRADED_DISK,
IMPLICITLY_UPGRADED_PDSK,
};
static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state os,
union drbd_state ns, const char **warn_sync_abort);
union drbd_state ns, enum sanitize_state_warnings *warn);
int drbd_send_state_req(struct drbd_conf *,
union drbd_state, union drbd_state);
@ -785,6 +860,13 @@ is_valid_state_transition(struct drbd_conf *mdev, union drbd_state ns,
if (ns.conn == os.conn && ns.conn == C_WF_REPORT_PARAMS)
rv = SS_IN_TRANSIENT_STATE;
/* While establishing a connection only allow cstate to change.
Delay/refuse role changes, detach attach etc... */
if (test_bit(STATE_SENT, &mdev->flags) &&
!(os.conn == C_WF_REPORT_PARAMS ||
(ns.conn == C_WF_REPORT_PARAMS && os.conn == C_WF_CONNECTION)))
rv = SS_IN_TRANSIENT_STATE;
if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) && os.conn < C_CONNECTED)
rv = SS_NEED_CONNECTION;
@ -803,6 +885,21 @@ is_valid_state_transition(struct drbd_conf *mdev, union drbd_state ns,
return rv;
}
static void print_sanitize_warnings(struct drbd_conf *mdev, enum sanitize_state_warnings warn)
{
static const char *msg_table[] = {
[NO_WARNING] = "",
[ABORTED_ONLINE_VERIFY] = "Online-verify aborted.",
[ABORTED_RESYNC] = "Resync aborted.",
[CONNECTION_LOST_NEGOTIATING] = "Connection lost while negotiating, no data!",
[IMPLICITLY_UPGRADED_DISK] = "Implicitly upgraded disk",
[IMPLICITLY_UPGRADED_PDSK] = "Implicitly upgraded pdsk",
};
if (warn != NO_WARNING)
dev_warn(DEV, "%s\n", msg_table[warn]);
}
/**
* sanitize_state() - Resolves implicitly necessary additional changes to a state transition
* @mdev: DRBD device.
@ -814,11 +911,14 @@ is_valid_state_transition(struct drbd_conf *mdev, union drbd_state ns,
* to D_UNKNOWN. This rule and many more along those lines are in this function.
*/
static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state os,
union drbd_state ns, const char **warn_sync_abort)
union drbd_state ns, enum sanitize_state_warnings *warn)
{
enum drbd_fencing_p fp;
enum drbd_disk_state disk_min, disk_max, pdsk_min, pdsk_max;
if (warn)
*warn = NO_WARNING;
fp = FP_DONT_CARE;
if (get_ldev(mdev)) {
fp = mdev->ldev->dc.fencing;
@ -833,18 +933,13 @@ static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state
/* After a network error (+C_TEAR_DOWN) only C_UNCONNECTED or C_DISCONNECTING can follow.
* If you try to go into some Sync* state, that shall fail (elsewhere). */
if (os.conn >= C_TIMEOUT && os.conn <= C_TEAR_DOWN &&
ns.conn != C_UNCONNECTED && ns.conn != C_DISCONNECTING && ns.conn <= C_TEAR_DOWN)
ns.conn != C_UNCONNECTED && ns.conn != C_DISCONNECTING && ns.conn <= C_CONNECTED)
ns.conn = os.conn;
/* we cannot fail (again) if we already detached */
if (ns.disk == D_FAILED && os.disk == D_DISKLESS)
ns.disk = D_DISKLESS;
/* if we are only D_ATTACHING yet,
* we can (and should) go directly to D_DISKLESS. */
if (ns.disk == D_FAILED && os.disk == D_ATTACHING)
ns.disk = D_DISKLESS;
/* After C_DISCONNECTING only C_STANDALONE may follow */
if (os.conn == C_DISCONNECTING && ns.conn != C_STANDALONE)
ns.conn = os.conn;
@ -863,10 +958,9 @@ static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state
/* Abort resync if a disk fails/detaches */
if (os.conn > C_CONNECTED && ns.conn > C_CONNECTED &&
(ns.disk <= D_FAILED || ns.pdsk <= D_FAILED)) {
if (warn_sync_abort)
*warn_sync_abort =
os.conn == C_VERIFY_S || os.conn == C_VERIFY_T ?
"Online-verify" : "Resync";
if (warn)
*warn = os.conn == C_VERIFY_S || os.conn == C_VERIFY_T ?
ABORTED_ONLINE_VERIFY : ABORTED_RESYNC;
ns.conn = C_CONNECTED;
}
@ -877,7 +971,8 @@ static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state
ns.disk = mdev->new_state_tmp.disk;
ns.pdsk = mdev->new_state_tmp.pdsk;
} else {
dev_alert(DEV, "Connection lost while negotiating, no data!\n");
if (warn)
*warn = CONNECTION_LOST_NEGOTIATING;
ns.disk = D_DISKLESS;
ns.pdsk = D_UNKNOWN;
}
@ -959,16 +1054,16 @@ static union drbd_state sanitize_state(struct drbd_conf *mdev, union drbd_state
ns.disk = disk_max;
if (ns.disk < disk_min) {
dev_warn(DEV, "Implicitly set disk from %s to %s\n",
drbd_disk_str(ns.disk), drbd_disk_str(disk_min));
if (warn)
*warn = IMPLICITLY_UPGRADED_DISK;
ns.disk = disk_min;
}
if (ns.pdsk > pdsk_max)
ns.pdsk = pdsk_max;
if (ns.pdsk < pdsk_min) {
dev_warn(DEV, "Implicitly set pdsk from %s to %s\n",
drbd_disk_str(ns.pdsk), drbd_disk_str(pdsk_min));
if (warn)
*warn = IMPLICITLY_UPGRADED_PDSK;
ns.pdsk = pdsk_min;
}
@ -1045,12 +1140,12 @@ __drbd_set_state(struct drbd_conf *mdev, union drbd_state ns,
{
union drbd_state os;
enum drbd_state_rv rv = SS_SUCCESS;
const char *warn_sync_abort = NULL;
enum sanitize_state_warnings ssw;
struct after_state_chg_work *ascw;
os = mdev->state;
ns = sanitize_state(mdev, os, ns, &warn_sync_abort);
ns = sanitize_state(mdev, os, ns, &ssw);
if (ns.i == os.i)
return SS_NOTHING_TO_DO;
@ -1076,8 +1171,7 @@ __drbd_set_state(struct drbd_conf *mdev, union drbd_state ns,
return rv;
}
if (warn_sync_abort)
dev_warn(DEV, "%s aborted.\n", warn_sync_abort);
print_sanitize_warnings(mdev, ssw);
{
char *pbp, pb[300];
@ -1243,7 +1337,7 @@ __drbd_set_state(struct drbd_conf *mdev, union drbd_state ns,
drbd_thread_stop_nowait(&mdev->receiver);
/* Upon network failure, we need to restart the receiver. */
if (os.conn > C_TEAR_DOWN &&
if (os.conn > C_WF_CONNECTION &&
ns.conn <= C_TEAR_DOWN && ns.conn >= C_TIMEOUT)
drbd_thread_restart_nowait(&mdev->receiver);
@ -1251,6 +1345,15 @@ __drbd_set_state(struct drbd_conf *mdev, union drbd_state ns,
if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED)
drbd_resume_al(mdev);
/* remember last connect and attach times so request_timer_fn() won't
* kill newly established sessions while we are still trying to thaw
* previously frozen IO */
if (os.conn != C_WF_REPORT_PARAMS && ns.conn == C_WF_REPORT_PARAMS)
mdev->last_reconnect_jif = jiffies;
if ((os.disk == D_ATTACHING || os.disk == D_NEGOTIATING) &&
ns.disk > D_NEGOTIATING)
mdev->last_reattach_jif = jiffies;
ascw = kmalloc(sizeof(*ascw), GFP_ATOMIC);
if (ascw) {
ascw->os = os;
@ -1354,12 +1457,16 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
/* Here we have the actions that are performed after a
state change. This function might sleep */
if (os.disk <= D_NEGOTIATING && ns.disk > D_NEGOTIATING)
mod_timer(&mdev->request_timer, jiffies + HZ);
nsm.i = -1;
if (ns.susp_nod) {
if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED)
what = resend;
if (os.disk == D_ATTACHING && ns.disk > D_ATTACHING)
if ((os.disk == D_ATTACHING || os.disk == D_NEGOTIATING) &&
ns.disk > D_NEGOTIATING)
what = restart_frozen_disk_io;
if (what != nothing)
@ -1408,7 +1515,7 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
/* Do not change the order of the if above and the two below... */
if (os.pdsk == D_DISKLESS && ns.pdsk > D_DISKLESS) { /* attach on the peer */
drbd_send_uuids(mdev);
drbd_send_state(mdev);
drbd_send_state(mdev, ns);
}
/* No point in queuing send_bitmap if we don't have a connection
* anymore, so check also the _current_ state, not only the new state
@ -1441,11 +1548,11 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
}
if (ns.pdsk < D_INCONSISTENT && get_ldev(mdev)) {
if (ns.peer == R_PRIMARY && mdev->ldev->md.uuid[UI_BITMAP] == 0) {
if (os.peer == R_SECONDARY && ns.peer == R_PRIMARY &&
mdev->ldev->md.uuid[UI_BITMAP] == 0 && ns.disk >= D_UP_TO_DATE) {
drbd_uuid_new_current(mdev);
drbd_send_uuids(mdev);
}
/* D_DISKLESS Peer becomes secondary */
if (os.peer == R_PRIMARY && ns.peer == R_SECONDARY)
/* We may still be Primary ourselves.
@ -1473,14 +1580,14 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
os.disk == D_ATTACHING && ns.disk == D_NEGOTIATING) {
drbd_send_sizes(mdev, 0, 0); /* to start sync... */
drbd_send_uuids(mdev);
drbd_send_state(mdev);
drbd_send_state(mdev, ns);
}
/* We want to pause/continue resync, tell peer. */
if (ns.conn >= C_CONNECTED &&
((os.aftr_isp != ns.aftr_isp) ||
(os.user_isp != ns.user_isp)))
drbd_send_state(mdev);
drbd_send_state(mdev, ns);
/* In case one of the isp bits got set, suspend other devices. */
if ((!os.aftr_isp && !os.peer_isp && !os.user_isp) &&
@ -1490,10 +1597,10 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
/* Make sure the peer gets informed about eventual state
changes (ISP bits) while we were in WFReportParams. */
if (os.conn == C_WF_REPORT_PARAMS && ns.conn >= C_CONNECTED)
drbd_send_state(mdev);
drbd_send_state(mdev, ns);
if (os.conn != C_AHEAD && ns.conn == C_AHEAD)
drbd_send_state(mdev);
drbd_send_state(mdev, ns);
/* We are in the progress to start a full sync... */
if ((os.conn != C_STARTING_SYNC_T && ns.conn == C_STARTING_SYNC_T) ||
@ -1513,33 +1620,38 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
/* first half of local IO error, failure to attach,
* or administrative detach */
if (os.disk != D_FAILED && ns.disk == D_FAILED) {
enum drbd_io_error_p eh;
int was_io_error;
enum drbd_io_error_p eh = EP_PASS_ON;
int was_io_error = 0;
/* corresponding get_ldev was in __drbd_set_state, to serialize
* our cleanup here with the transition to D_DISKLESS,
* so it is safe to dreference ldev here. */
eh = mdev->ldev->dc.on_io_error;
was_io_error = test_and_clear_bit(WAS_IO_ERROR, &mdev->flags);
* our cleanup here with the transition to D_DISKLESS.
* But is is still not save to dreference ldev here, since
* we might come from an failed Attach before ldev was set. */
if (mdev->ldev) {
eh = mdev->ldev->dc.on_io_error;
was_io_error = test_and_clear_bit(WAS_IO_ERROR, &mdev->flags);
/* current state still has to be D_FAILED,
* there is only one way out: to D_DISKLESS,
* and that may only happen after our put_ldev below. */
if (mdev->state.disk != D_FAILED)
dev_err(DEV,
"ASSERT FAILED: disk is %s during detach\n",
drbd_disk_str(mdev->state.disk));
/* Immediately allow completion of all application IO, that waits
for completion from the local disk. */
tl_abort_disk_io(mdev);
if (drbd_send_state(mdev))
dev_warn(DEV, "Notified peer that I am detaching my disk\n");
else
dev_err(DEV, "Sending state for detaching disk failed\n");
/* current state still has to be D_FAILED,
* there is only one way out: to D_DISKLESS,
* and that may only happen after our put_ldev below. */
if (mdev->state.disk != D_FAILED)
dev_err(DEV,
"ASSERT FAILED: disk is %s during detach\n",
drbd_disk_str(mdev->state.disk));
drbd_rs_cancel_all(mdev);
if (ns.conn >= C_CONNECTED)
drbd_send_state(mdev, ns);
/* In case we want to get something to stable storage still,
* this may be the last chance.
* Following put_ldev may transition to D_DISKLESS. */
drbd_md_sync(mdev);
drbd_rs_cancel_all(mdev);
/* In case we want to get something to stable storage still,
* this may be the last chance.
* Following put_ldev may transition to D_DISKLESS. */
drbd_md_sync(mdev);
}
put_ldev(mdev);
if (was_io_error && eh == EP_CALL_HELPER)
@ -1561,16 +1673,17 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
mdev->rs_failed = 0;
atomic_set(&mdev->rs_pending_cnt, 0);
if (drbd_send_state(mdev))
dev_warn(DEV, "Notified peer that I'm now diskless.\n");
if (ns.conn >= C_CONNECTED)
drbd_send_state(mdev, ns);
/* corresponding get_ldev in __drbd_set_state
* this may finally trigger drbd_ldev_destroy. */
put_ldev(mdev);
}
/* Notify peer that I had a local IO error, and did not detached.. */
if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT)
drbd_send_state(mdev);
if (os.disk == D_UP_TO_DATE && ns.disk == D_INCONSISTENT && ns.conn >= C_CONNECTED)
drbd_send_state(mdev, ns);
/* Disks got bigger while they were detached */
if (ns.disk > D_NEGOTIATING && ns.pdsk > D_NEGOTIATING &&
@ -1588,7 +1701,13 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
/* sync target done with resync. Explicitly notify peer, even though
* it should (at least for non-empty resyncs) already know itself. */
if (os.disk < D_UP_TO_DATE && os.conn >= C_SYNC_SOURCE && ns.conn == C_CONNECTED)
drbd_send_state(mdev);
drbd_send_state(mdev, ns);
/* Wake up role changes, that were delayed because of connection establishing */
if (os.conn == C_WF_REPORT_PARAMS && ns.conn != C_WF_REPORT_PARAMS) {
clear_bit(STATE_SENT, &mdev->flags);
wake_up(&mdev->state_wait);
}
/* This triggers bitmap writeout of potentially still unwritten pages
* if the resync finished cleanly, or aborted because of peer disk
@ -1598,8 +1717,8 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
* No harm done if some bits change during this phase.
*/
if (os.conn > C_CONNECTED && ns.conn <= C_CONNECTED && get_ldev(mdev)) {
drbd_queue_bitmap_io(mdev, &drbd_bm_write, NULL,
"write from resync_finished", BM_LOCKED_SET_ALLOWED);
drbd_queue_bitmap_io(mdev, &drbd_bm_write_copy_pages, NULL,
"write from resync_finished", BM_LOCKED_CHANGE_ALLOWED);
put_ldev(mdev);
}
@ -2057,7 +2176,11 @@ int drbd_gen_and_send_sync_uuid(struct drbd_conf *mdev)
D_ASSERT(mdev->state.disk == D_UP_TO_DATE);
uuid = mdev->ldev->md.uuid[UI_BITMAP] + UUID_NEW_BM_OFFSET;
uuid = mdev->ldev->md.uuid[UI_BITMAP];
if (uuid && uuid != UUID_JUST_CREATED)
uuid = uuid + UUID_NEW_BM_OFFSET;
else
get_random_bytes(&uuid, sizeof(u64));
drbd_uuid_set(mdev, UI_BITMAP, uuid);
drbd_print_uuids(mdev, "updated sync UUID");
drbd_md_sync(mdev);
@ -2089,6 +2212,10 @@ int drbd_send_sizes(struct drbd_conf *mdev, int trigger_reply, enum dds_flags fl
max_bio_size = DRBD_MAX_BIO_SIZE; /* ... multiple BIOs per peer_request */
}
/* Never allow old drbd (up to 8.3.7) to see more than 32KiB */
if (mdev->agreed_pro_version <= 94)
max_bio_size = min_t(int, max_bio_size, DRBD_MAX_SIZE_H80_PACKET);
p.d_size = cpu_to_be64(d_size);
p.u_size = cpu_to_be64(u_size);
p.c_size = cpu_to_be64(trigger_reply ? 0 : drbd_get_capacity(mdev->this_bdev));
@ -2102,10 +2229,10 @@ int drbd_send_sizes(struct drbd_conf *mdev, int trigger_reply, enum dds_flags fl
}
/**
* drbd_send_state() - Sends the drbd state to the peer
* drbd_send_current_state() - Sends the drbd state to the peer
* @mdev: DRBD device.
*/
int drbd_send_state(struct drbd_conf *mdev)
int drbd_send_current_state(struct drbd_conf *mdev)
{
struct socket *sock;
struct p_state p;
@ -2131,6 +2258,37 @@ int drbd_send_state(struct drbd_conf *mdev)
return ok;
}
/**
* drbd_send_state() - After a state change, sends the new state to the peer
* @mdev: DRBD device.
* @state: the state to send, not necessarily the current state.
*
* Each state change queues an "after_state_ch" work, which will eventually
* send the resulting new state to the peer. If more state changes happen
* between queuing and processing of the after_state_ch work, we still
* want to send each intermediary state in the order it occurred.
*/
int drbd_send_state(struct drbd_conf *mdev, union drbd_state state)
{
struct socket *sock;
struct p_state p;
int ok = 0;
mutex_lock(&mdev->data.mutex);
p.state = cpu_to_be32(state.i);
sock = mdev->data.socket;
if (likely(sock != NULL)) {
ok = _drbd_send_cmd(mdev, sock, P_STATE,
(struct p_header80 *)&p, sizeof(p), 0);
}
mutex_unlock(&mdev->data.mutex);
return ok;
}
int drbd_send_state_req(struct drbd_conf *mdev,
union drbd_state mask, union drbd_state val)
{
@ -2615,7 +2773,7 @@ static int _drbd_send_bio(struct drbd_conf *mdev, struct bio *bio)
struct bio_vec *bvec;
int i;
/* hint all but last page with MSG_MORE */
__bio_for_each_segment(bvec, bio, i, 0) {
bio_for_each_segment(bvec, bio, i) {
if (!_drbd_no_send_page(mdev, bvec->bv_page,
bvec->bv_offset, bvec->bv_len,
i == bio->bi_vcnt -1 ? 0 : MSG_MORE))
@ -2629,7 +2787,7 @@ static int _drbd_send_zc_bio(struct drbd_conf *mdev, struct bio *bio)
struct bio_vec *bvec;
int i;
/* hint all but last page with MSG_MORE */
__bio_for_each_segment(bvec, bio, i, 0) {
bio_for_each_segment(bvec, bio, i) {
if (!_drbd_send_page(mdev, bvec->bv_page,
bvec->bv_offset, bvec->bv_len,
i == bio->bi_vcnt -1 ? 0 : MSG_MORE))
@ -2695,8 +2853,7 @@ int drbd_send_dblock(struct drbd_conf *mdev, struct drbd_request *req)
p.sector = cpu_to_be64(req->sector);
p.block_id = (unsigned long)req;
p.seq_num = cpu_to_be32(req->seq_num =
atomic_add_return(1, &mdev->packet_seq));
p.seq_num = cpu_to_be32(atomic_add_return(1, &mdev->packet_seq));
dp_flags = bio_flags_to_wire(mdev, req->master_bio->bi_rw);
@ -2987,8 +3144,8 @@ void drbd_init_set_defaults(struct drbd_conf *mdev)
atomic_set(&mdev->rs_sect_in, 0);
atomic_set(&mdev->rs_sect_ev, 0);
atomic_set(&mdev->ap_in_flight, 0);
atomic_set(&mdev->md_io_in_use, 0);
mutex_init(&mdev->md_io_mutex);
mutex_init(&mdev->data.mutex);
mutex_init(&mdev->meta.mutex);
sema_init(&mdev->data.work.s, 0);
@ -3126,6 +3283,10 @@ static void drbd_destroy_mempools(void)
/* D_ASSERT(atomic_read(&drbd_pp_vacant)==0); */
if (drbd_md_io_bio_set)
bioset_free(drbd_md_io_bio_set);
if (drbd_md_io_page_pool)
mempool_destroy(drbd_md_io_page_pool);
if (drbd_ee_mempool)
mempool_destroy(drbd_ee_mempool);
if (drbd_request_mempool)
@ -3139,6 +3300,8 @@ static void drbd_destroy_mempools(void)
if (drbd_al_ext_cache)
kmem_cache_destroy(drbd_al_ext_cache);
drbd_md_io_bio_set = NULL;
drbd_md_io_page_pool = NULL;
drbd_ee_mempool = NULL;
drbd_request_mempool = NULL;
drbd_ee_cache = NULL;
@ -3162,6 +3325,8 @@ static int drbd_create_mempools(void)
drbd_bm_ext_cache = NULL;
drbd_al_ext_cache = NULL;
drbd_pp_pool = NULL;
drbd_md_io_page_pool = NULL;
drbd_md_io_bio_set = NULL;
/* caches */
drbd_request_cache = kmem_cache_create(
@ -3185,6 +3350,16 @@ static int drbd_create_mempools(void)
goto Enomem;
/* mempools */
#ifdef COMPAT_HAVE_BIOSET_CREATE
drbd_md_io_bio_set = bioset_create(DRBD_MIN_POOL_PAGES, 0);
if (drbd_md_io_bio_set == NULL)
goto Enomem;
#endif
drbd_md_io_page_pool = mempool_create_page_pool(DRBD_MIN_POOL_PAGES, 0);
if (drbd_md_io_page_pool == NULL)
goto Enomem;
drbd_request_mempool = mempool_create(number,
mempool_alloc_slab, mempool_free_slab, drbd_request_cache);
if (drbd_request_mempool == NULL)
@ -3262,6 +3437,8 @@ static void drbd_delete_device(unsigned int minor)
if (!mdev)
return;
del_timer_sync(&mdev->request_timer);
/* paranoia asserts */
if (mdev->open_cnt != 0)
dev_err(DEV, "open_cnt = %d in %s:%u", mdev->open_cnt,
@ -3666,8 +3843,10 @@ void drbd_md_sync(struct drbd_conf *mdev)
if (!get_ldev_if_state(mdev, D_FAILED))
return;
mutex_lock(&mdev->md_io_mutex);
buffer = (struct meta_data_on_disk *)page_address(mdev->md_io_page);
buffer = drbd_md_get_buffer(mdev);
if (!buffer)
goto out;
memset(buffer, 0, 512);
buffer->la_size = cpu_to_be64(drbd_get_capacity(mdev->this_bdev));
@ -3698,7 +3877,8 @@ void drbd_md_sync(struct drbd_conf *mdev)
* since we updated it on metadata. */
mdev->ldev->md.la_size_sect = drbd_get_capacity(mdev->this_bdev);
mutex_unlock(&mdev->md_io_mutex);
drbd_md_put_buffer(mdev);
out:
put_ldev(mdev);
}
@ -3718,8 +3898,9 @@ int drbd_md_read(struct drbd_conf *mdev, struct drbd_backing_dev *bdev)
if (!get_ldev_if_state(mdev, D_ATTACHING))
return ERR_IO_MD_DISK;
mutex_lock(&mdev->md_io_mutex);
buffer = (struct meta_data_on_disk *)page_address(mdev->md_io_page);
buffer = drbd_md_get_buffer(mdev);
if (!buffer)
goto out;
if (!drbd_md_sync_page_io(mdev, bdev, bdev->md.md_offset, READ)) {
/* NOTE: can't do normal error processing here as this is
@ -3780,7 +3961,8 @@ int drbd_md_read(struct drbd_conf *mdev, struct drbd_backing_dev *bdev)
mdev->sync_conf.al_extents = 127;
err:
mutex_unlock(&mdev->md_io_mutex);
drbd_md_put_buffer(mdev);
out:
put_ldev(mdev);
return rv;
@ -4183,12 +4365,11 @@ const char *drbd_buildtag(void)
static char buildtag[38] = "\0uilt-in";
if (buildtag[0] == 0) {
#ifdef CONFIG_MODULES
if (THIS_MODULE != NULL)
sprintf(buildtag, "srcversion: %-24s", THIS_MODULE->srcversion);
else
#ifdef MODULE
sprintf(buildtag, "srcversion: %-24s", THIS_MODULE->srcversion);
#else
buildtag[0] = 'b';
#endif
buildtag[0] = 'b';
}
return buildtag;

48
drivers/block/drbd/drbd_nl.c
View File

@ -289,7 +289,7 @@ static int _try_outdate_peer_async(void *data)
*/
spin_lock_irq(&mdev->req_lock);
ns = mdev->state;
if (ns.conn < C_WF_REPORT_PARAMS) {
if (ns.conn < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &mdev->flags)) {
ns.pdsk = nps;
_drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
}
@ -432,7 +432,7 @@ drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
/* if this was forced, we should consider sync */
if (forced)
drbd_send_uuids(mdev);
drbd_send_state(mdev);
drbd_send_current_state(mdev);
}
drbd_md_sync(mdev);
@ -845,9 +845,10 @@ void drbd_reconsider_max_bio_size(struct drbd_conf *mdev)
Because new from 8.3.8 onwards the peer can use multiple
BIOs for a single peer_request */
if (mdev->state.conn >= C_CONNECTED) {
if (mdev->agreed_pro_version < 94)
peer = mdev->peer_max_bio_size;
else if (mdev->agreed_pro_version == 94)
if (mdev->agreed_pro_version < 94) {
peer = min_t(int, mdev->peer_max_bio_size, DRBD_MAX_SIZE_H80_PACKET);
/* Correct old drbd (up to 8.3.7) if it believes it can do more than 32KiB */
} else if (mdev->agreed_pro_version == 94)
peer = DRBD_MAX_SIZE_H80_PACKET;
else /* drbd 8.3.8 onwards */
peer = DRBD_MAX_BIO_SIZE;
@ -1032,7 +1033,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
dev_err(DEV, "max capacity %llu smaller than disk size %llu\n",
(unsigned long long) drbd_get_max_capacity(nbc),
(unsigned long long) nbc->dc.disk_size);
retcode = ERR_DISK_TO_SMALL;
retcode = ERR_DISK_TOO_SMALL;
goto fail;
}
@ -1046,7 +1047,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
}
if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) {
retcode = ERR_MD_DISK_TO_SMALL;
retcode = ERR_MD_DISK_TOO_SMALL;
dev_warn(DEV, "refusing attach: md-device too small, "
"at least %llu sectors needed for this meta-disk type\n",
(unsigned long long) min_md_device_sectors);
@ -1057,7 +1058,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
* (we may currently be R_PRIMARY with no local disk...) */
if (drbd_get_max_capacity(nbc) <
drbd_get_capacity(mdev->this_bdev)) {
retcode = ERR_DISK_TO_SMALL;
retcode = ERR_DISK_TOO_SMALL;
goto fail;
}
@ -1138,7 +1139,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
if (drbd_md_test_flag(nbc, MDF_CONSISTENT) &&
drbd_new_dev_size(mdev, nbc, 0) < nbc->md.la_size_sect) {
dev_warn(DEV, "refusing to truncate a consistent device\n");
retcode = ERR_DISK_TO_SMALL;
retcode = ERR_DISK_TOO_SMALL;
goto force_diskless_dec;
}
@ -1336,17 +1337,34 @@ static int drbd_nl_detach(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
{
enum drbd_ret_code retcode;
int ret;
struct detach dt = {};
if (!detach_from_tags(mdev, nlp->tag_list, &dt)) {
reply->ret_code = ERR_MANDATORY_TAG;
goto out;
}
if (dt.detach_force) {
drbd_force_state(mdev, NS(disk, D_FAILED));
reply->ret_code = SS_SUCCESS;
goto out;
}
drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */
drbd_md_get_buffer(mdev); /* make sure there is no in-flight meta-data IO */
retcode = drbd_request_state(mdev, NS(disk, D_FAILED));
drbd_md_put_buffer(mdev);
/* D_FAILED will transition to DISKLESS. */
ret = wait_event_interruptible(mdev->misc_wait,
mdev->state.disk != D_FAILED);
drbd_resume_io(mdev);
if ((int)retcode == (int)SS_IS_DISKLESS)
retcode = SS_NOTHING_TO_DO;
if (ret)
retcode = ERR_INTR;
reply->ret_code = retcode;
out:
return 0;
}
@ -1711,7 +1729,7 @@ static int drbd_nl_resize(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
if (rs.no_resync && mdev->agreed_pro_version < 93) {
retcode = ERR_NEED_APV_93;
goto fail;
goto fail_ldev;
}
if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev))
@ -1738,6 +1756,10 @@ static int drbd_nl_resize(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
fail:
reply->ret_code = retcode;
return 0;
fail_ldev:
put_ldev(mdev);
goto fail;
}
static int drbd_nl_syncer_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
@ -1941,6 +1963,7 @@ static int drbd_nl_invalidate(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl
/* If there is still bitmap IO pending, probably because of a previous
* resync just being finished, wait for it before requesting a new resync. */
drbd_suspend_io(mdev);
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED);
@ -1959,6 +1982,7 @@ static int drbd_nl_invalidate(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl
retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T));
}
drbd_resume_io(mdev);
reply->ret_code = retcode;
return 0;
@ -1980,6 +2004,7 @@ static int drbd_nl_invalidate_peer(struct drbd_conf *mdev, struct drbd_nl_cfg_re
/* If there is still bitmap IO pending, probably because of a previous
* resync just being finished, wait for it before requesting a new resync. */
drbd_suspend_io(mdev);
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S), CS_ORDERED);
@ -1998,6 +2023,7 @@ static int drbd_nl_invalidate_peer(struct drbd_conf *mdev, struct drbd_nl_cfg_re
} else
retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S));
}
drbd_resume_io(mdev);
reply->ret_code = retcode;
return 0;
@ -2170,11 +2196,13 @@ static int drbd_nl_start_ov(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
/* If there is still bitmap IO pending, e.g. previous resync or verify
* just being finished, wait for it before requesting a new resync. */
drbd_suspend_io(mdev);
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));
drbd_resume_io(mdev);
return 0;
}

2
drivers/block/drbd/drbd_proc.c
View File

@ -52,7 +52,7 @@ void seq_printf_with_thousands_grouping(struct seq_file *seq, long v)
if (unlikely(v >= 1000000)) {
/* cool: > GiByte/s */
seq_printf(seq, "%ld,", v / 1000000);
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);

95
drivers/block/drbd/drbd_receiver.c
View File

@ -466,6 +466,7 @@ static int drbd_accept(struct drbd_conf *mdev, const char **what,
goto out;
}
(*newsock)->ops = sock->ops;
__module_get((*newsock)->ops->owner);
out:
return err;
@ -750,6 +751,7 @@ static int drbd_connect(struct drbd_conf *mdev)
{
struct socket *s, *sock, *msock;
int try, h, ok;
enum drbd_state_rv rv;
D_ASSERT(!mdev->data.socket);
@ -888,25 +890,32 @@ retry:
}
}
if (drbd_request_state(mdev, NS(conn, C_WF_REPORT_PARAMS)) < SS_SUCCESS)
return 0;
sock->sk->sk_sndtimeo = mdev->net_conf->timeout*HZ/10;
sock->sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
atomic_set(&mdev->packet_seq, 0);
mdev->peer_seq = 0;
drbd_thread_start(&mdev->asender);
if (drbd_send_protocol(mdev) == -1)
return -1;
set_bit(STATE_SENT, &mdev->flags);
drbd_send_sync_param(mdev, &mdev->sync_conf);
drbd_send_sizes(mdev, 0, 0);
drbd_send_uuids(mdev);
drbd_send_state(mdev);
drbd_send_current_state(mdev);
clear_bit(USE_DEGR_WFC_T, &mdev->flags);
clear_bit(RESIZE_PENDING, &mdev->flags);
spin_lock_irq(&mdev->req_lock);
rv = _drbd_set_state(_NS(mdev, conn, C_WF_REPORT_PARAMS), CS_VERBOSE, NULL);
if (mdev->state.conn != C_WF_REPORT_PARAMS)
clear_bit(STATE_SENT, &mdev->flags);
spin_unlock_irq(&mdev->req_lock);
if (rv < SS_SUCCESS)
return 0;
drbd_thread_start(&mdev->asender);
mod_timer(&mdev->request_timer, jiffies + HZ); /* just start it here. */
return 1;
@ -957,7 +966,7 @@ static void drbd_flush(struct drbd_conf *mdev)
rv = blkdev_issue_flush(mdev->ldev->backing_bdev, GFP_KERNEL,
NULL);
if (rv) {
dev_err(DEV, "local disk flush failed with status %d\n", rv);
dev_info(DEV, "local disk flush failed with status %d\n", rv);
/* would rather check on EOPNOTSUPP, but that is not reliable.
* don't try again for ANY return value != 0
* if (rv == -EOPNOTSUPP) */
@ -1001,13 +1010,14 @@ static enum finish_epoch drbd_may_finish_epoch(struct drbd_conf *mdev,
if (epoch_size != 0 &&
atomic_read(&epoch->active) == 0 &&
test_bit(DE_HAVE_BARRIER_NUMBER, &epoch->flags)) {
(test_bit(DE_HAVE_BARRIER_NUMBER, &epoch->flags) || ev & EV_CLEANUP)) {
if (!(ev & EV_CLEANUP)) {
spin_unlock(&mdev->epoch_lock);
drbd_send_b_ack(mdev, epoch->barrier_nr, epoch_size);
spin_lock(&mdev->epoch_lock);
}
dec_unacked(mdev);
if (test_bit(DE_HAVE_BARRIER_NUMBER, &epoch->flags))
dec_unacked(mdev);
if (mdev->current_epoch != epoch) {
next_epoch = list_entry(epoch->list.next, struct drbd_epoch, list);
@ -1096,7 +1106,11 @@ int drbd_submit_ee(struct drbd_conf *mdev, struct drbd_epoch_entry *e,
/* In most cases, we will only need one bio. But in case the lower
* level restrictions happen to be different at this offset on this
* side than those of the sending peer, we may need to submit the
* request in more than one bio. */
* request in more than one bio.
*
* Plain bio_alloc is good enough here, this is no DRBD internally
* generated bio, but a bio allocated on behalf of the peer.
*/
next_bio:
bio = bio_alloc(GFP_NOIO, nr_pages);
if (!bio) {
@ -1583,6 +1597,24 @@ static int e_send_discard_ack(struct drbd_conf *mdev, struct drbd_work *w, int u
return ok;
}
static bool overlapping_resync_write(struct drbd_conf *mdev, struct drbd_epoch_entry *data_e)
{
struct drbd_epoch_entry *rs_e;
bool rv = 0;
spin_lock_irq(&mdev->req_lock);
list_for_each_entry(rs_e, &mdev->sync_ee, w.list) {
if (overlaps(data_e->sector, data_e->size, rs_e->sector, rs_e->size)) {
rv = 1;
break;
}
}
spin_unlock_irq(&mdev->req_lock);
return rv;
}
/* Called from receive_Data.
* Synchronize packets on sock with packets on msock.
*
@ -1826,6 +1858,9 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
list_add(&e->w.list, &mdev->active_ee);
spin_unlock_irq(&mdev->req_lock);
if (mdev->state.conn == C_SYNC_TARGET)
wait_event(mdev->ee_wait, !overlapping_resync_write(mdev, e));
switch (mdev->net_conf->wire_protocol) {
case DRBD_PROT_C:
inc_unacked(mdev);
@ -2420,7 +2455,7 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
mdev->p_uuid[UI_BITMAP] = mdev->p_uuid[UI_HISTORY_START];
mdev->p_uuid[UI_HISTORY_START] = mdev->p_uuid[UI_HISTORY_START + 1];
dev_info(DEV, "Did not got last syncUUID packet, corrected:\n");
dev_info(DEV, "Lost last syncUUID packet, corrected:\n");
drbd_uuid_dump(mdev, "peer", mdev->p_uuid, mdev->p_uuid[UI_SIZE], mdev->p_uuid[UI_FLAGS]);
return -1;
@ -2806,10 +2841,10 @@ static int receive_SyncParam(struct drbd_conf *mdev, enum drbd_packets cmd, unsi
if (apv >= 88) {
if (apv == 88) {
if (data_size > SHARED_SECRET_MAX) {
dev_err(DEV, "verify-alg too long, "
"peer wants %u, accepting only %u byte\n",
data_size, SHARED_SECRET_MAX);
if (data_size > SHARED_SECRET_MAX || data_size == 0) {
dev_err(DEV, "verify-alg of wrong size, "
"peer wants %u, accepting only up to %u byte\n",
data_size, SHARED_SECRET_MAX);
return false;
}
@ -3168,9 +3203,20 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
os = ns = mdev->state;
spin_unlock_irq(&mdev->req_lock);
/* peer says his disk is uptodate, while we think it is inconsistent,
* and this happens while we think we have a sync going on. */
if (os.pdsk == D_INCONSISTENT && real_peer_disk == D_UP_TO_DATE &&
/* If some other part of the code (asender thread, timeout)
* already decided to close the connection again,
* we must not "re-establish" it here. */
if (os.conn <= C_TEAR_DOWN)
return false;
/* If this is the "end of sync" confirmation, usually the peer disk
* transitions from D_INCONSISTENT to D_UP_TO_DATE. For empty (0 bits
* set) resync started in PausedSyncT, or if the timing of pause-/
* unpause-sync events has been "just right", the peer disk may
* transition from D_CONSISTENT to D_UP_TO_DATE as well.
*/
if ((os.pdsk == D_INCONSISTENT || os.pdsk == D_CONSISTENT) &&
real_peer_disk == D_UP_TO_DATE &&
os.conn > C_CONNECTED && os.disk == D_UP_TO_DATE) {
/* If we are (becoming) SyncSource, but peer is still in sync
* preparation, ignore its uptodate-ness to avoid flapping, it
@ -3288,7 +3334,7 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
/* Nowadays only used when forcing a node into primary role and
setting its disk to UpToDate with that */
drbd_send_uuids(mdev);
drbd_send_state(mdev);
drbd_send_current_state(mdev);
}
}
@ -3776,6 +3822,13 @@ static void drbd_disconnect(struct drbd_conf *mdev)
if (mdev->state.conn == C_STANDALONE)
return;
/* We are about to start the cleanup after connection loss.
* Make sure drbd_make_request knows about that.
* Usually we should be in some network failure state already,
* but just in case we are not, we fix it up here.
*/
drbd_force_state(mdev, NS(conn, C_NETWORK_FAILURE));
/* asender does not clean up anything. it must not interfere, either */
drbd_thread_stop(&mdev->asender);
drbd_free_sock(mdev);
@ -3803,8 +3856,6 @@ static void drbd_disconnect(struct drbd_conf *mdev)
atomic_set(&mdev->rs_pending_cnt, 0);
wake_up(&mdev->misc_wait);
del_timer(&mdev->request_timer);
/* make sure syncer is stopped and w_resume_next_sg queued */
del_timer_sync(&mdev->resync_timer);
resync_timer_fn((unsigned long)mdev);
@ -4433,7 +4484,7 @@ static int got_BarrierAck(struct drbd_conf *mdev, struct p_header80 *h)
if (mdev->state.conn == C_AHEAD &&
atomic_read(&mdev->ap_in_flight) == 0 &&
!test_and_set_bit(AHEAD_TO_SYNC_SOURCE, &mdev->current_epoch->flags)) {
!test_and_set_bit(AHEAD_TO_SYNC_SOURCE, &mdev->flags)) {
mdev->start_resync_timer.expires = jiffies + HZ;
add_timer(&mdev->start_resync_timer);
}

132
drivers/block/drbd/drbd_req.c
View File

@ -37,6 +37,7 @@ static void _drbd_start_io_acct(struct drbd_conf *mdev, struct drbd_request *req
const int rw = bio_data_dir(bio);
int cpu;
cpu = part_stat_lock();
part_round_stats(cpu, &mdev->vdisk->part0);
part_stat_inc(cpu, &mdev->vdisk->part0, ios[rw]);
part_stat_add(cpu, &mdev->vdisk->part0, sectors[rw], bio_sectors(bio));
part_inc_in_flight(&mdev->vdisk->part0, rw);
@ -214,8 +215,7 @@ void _req_may_be_done(struct drbd_request *req, struct bio_and_error *m)
{
const unsigned long s = req->rq_state;
struct drbd_conf *mdev = req->mdev;
/* only WRITES may end up here without a master bio (on barrier ack) */
int rw = req->master_bio ? bio_data_dir(req->master_bio) : WRITE;
int rw = req->rq_state & RQ_WRITE ? WRITE : READ;
/* we must not complete the master bio, while it is
* still being processed by _drbd_send_zc_bio (drbd_send_dblock)
@ -230,7 +230,7 @@ void _req_may_be_done(struct drbd_request *req, struct bio_and_error *m)
return;
if (s & RQ_NET_PENDING)
return;
if (s & RQ_LOCAL_PENDING)
if (s & RQ_LOCAL_PENDING && !(s & RQ_LOCAL_ABORTED))
return;
if (req->master_bio) {
@ -277,6 +277,9 @@ void _req_may_be_done(struct drbd_request *req, struct bio_and_error *m)
req->master_bio = NULL;
}
if (s & RQ_LOCAL_PENDING)
return;
if ((s & RQ_NET_MASK) == 0 || (s & RQ_NET_DONE)) {
/* this is disconnected (local only) operation,
* or protocol C P_WRITE_ACK,
@ -429,7 +432,7 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
break;
case completed_ok:
if (bio_data_dir(req->master_bio) == WRITE)
if (req->rq_state & RQ_WRITE)
mdev->writ_cnt += req->size>>9;
else
mdev->read_cnt += req->size>>9;
@ -438,7 +441,14 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
req->rq_state &= ~RQ_LOCAL_PENDING;
_req_may_be_done_not_susp(req, m);
put_ldev(mdev);
break;
case abort_disk_io:
req->rq_state |= RQ_LOCAL_ABORTED;
if (req->rq_state & RQ_WRITE)
_req_may_be_done_not_susp(req, m);
else
goto goto_queue_for_net_read;
break;
case write_completed_with_error:
@ -447,7 +457,6 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
__drbd_chk_io_error(mdev, false);
_req_may_be_done_not_susp(req, m);
put_ldev(mdev);
break;
case read_ahead_completed_with_error:
@ -455,7 +464,6 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
req->rq_state |= RQ_LOCAL_COMPLETED;
req->rq_state &= ~RQ_LOCAL_PENDING;
_req_may_be_done_not_susp(req, m);
put_ldev(mdev);
break;
case read_completed_with_error:
@ -467,7 +475,8 @@ 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);
put_ldev(mdev);
goto_queue_for_net_read:
/* no point in retrying if there is no good remote data,
* or we have no connection. */
@ -556,10 +565,8 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
drbd_queue_work(&mdev->data.work, &req->w);
break;
case oos_handed_to_network:
/* actually the same */
case read_retry_remote_canceled:
case send_canceled:
/* treat it the same */
case send_failed:
/* real cleanup will be done from tl_clear. just update flags
* so it is no longer marked as on the worker queue */
@ -589,17 +596,17 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
}
req->rq_state &= ~RQ_NET_QUEUED;
req->rq_state |= RQ_NET_SENT;
/* because _drbd_send_zc_bio could sleep, and may want to
* dereference the bio even after the "write_acked_by_peer" and
* "completed_ok" events came in, once we return from
* _drbd_send_zc_bio (drbd_send_dblock), we have to check
* whether it is done already, and end it. */
_req_may_be_done_not_susp(req, m);
break;
case read_retry_remote_canceled:
case oos_handed_to_network:
/* Was not set PENDING, no longer QUEUED, so is now DONE
* as far as this connection is concerned. */
req->rq_state &= ~RQ_NET_QUEUED;
/* fall through, in case we raced with drbd_disconnect */
req->rq_state |= RQ_NET_DONE;
_req_may_be_done_not_susp(req, m);
break;
case connection_lost_while_pending:
/* transfer log cleanup after connection loss */
/* assert something? */
@ -616,8 +623,6 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
_req_may_be_done(req, m); /* Allowed while state.susp */
break;
case write_acked_by_peer_and_sis:
req->rq_state |= RQ_NET_SIS;
case conflict_discarded_by_peer:
/* for discarded conflicting writes of multiple primaries,
* there is no need to keep anything in the tl, potential
@ -628,18 +633,15 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
(unsigned long long)req->sector, req->size);
req->rq_state |= RQ_NET_DONE;
/* fall through */
case write_acked_by_peer_and_sis:
case write_acked_by_peer:
if (what == write_acked_by_peer_and_sis)
req->rq_state |= RQ_NET_SIS;
/* protocol C; successfully written on peer.
* Nothing to do here.
* Nothing more to do here.
* We want to keep the tl in place for all protocols, to cater
* for volatile write-back caches on lower level devices.
*
* A barrier request is expected to have forced all prior
* requests onto stable storage, so completion of a barrier
* request could set NET_DONE right here, and not wait for the
* P_BARRIER_ACK, but that is an unnecessary optimization. */
* for volatile write-back caches on lower level devices. */
/* this makes it effectively the same as for: */
case recv_acked_by_peer:
/* protocol B; pretends to be successfully written on peer.
* see also notes above in handed_over_to_network about
@ -773,6 +775,7 @@ static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio, uns
int local, remote, send_oos = 0;
int err = -EIO;
int ret = 0;
union drbd_state s;
/* allocate outside of all locks; */
req = drbd_req_new(mdev, bio);
@ -834,8 +837,9 @@ static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio, uns
drbd_al_begin_io(mdev, sector);
}
remote = remote && drbd_should_do_remote(mdev->state);
send_oos = rw == WRITE && drbd_should_send_oos(mdev->state);
s = mdev->state;
remote = remote && drbd_should_do_remote(s);
send_oos = rw == WRITE && drbd_should_send_oos(s);
D_ASSERT(!(remote && send_oos));
if (!(local || remote) && !is_susp(mdev->state)) {
@ -867,7 +871,7 @@ allocate_barrier:
if (is_susp(mdev->state)) {
/* If we got suspended, use the retry mechanism of
generic_make_request() to restart processing of this
drbd_make_request() to restart processing of this
bio. In the next call to drbd_make_request
we sleep in inc_ap_bio() */
ret = 1;
@ -1091,7 +1095,6 @@ void drbd_make_request(struct request_queue *q, struct bio *bio)
*/
D_ASSERT(bio->bi_size > 0);
D_ASSERT((bio->bi_size & 0x1ff) == 0);
D_ASSERT(bio->bi_idx == 0);
/* to make some things easier, force alignment of requests within the
* granularity of our hash tables */
@ -1099,8 +1102,9 @@ void drbd_make_request(struct request_queue *q, struct bio *bio)
e_enr = (bio->bi_sector+(bio->bi_size>>9)-1) >> HT_SHIFT;
if (likely(s_enr == e_enr)) {
inc_ap_bio(mdev, 1);
drbd_make_request_common(mdev, bio, start_time);
do {
inc_ap_bio(mdev, 1);
} while (drbd_make_request_common(mdev, bio, start_time));
return;
}
@ -1196,36 +1200,66 @@ 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 */
unsigned long ent = 0, dt = 0, et, nt; /* effective timeout = ko_count * timeout */
unsigned long now;
if (get_net_conf(mdev)) {
et = mdev->net_conf->timeout*HZ/10 * mdev->net_conf->ko_count;
if (mdev->state.conn >= C_WF_REPORT_PARAMS)
ent = mdev->net_conf->timeout*HZ/10
* mdev->net_conf->ko_count;
put_net_conf(mdev);
}
if (!et || mdev->state.conn < C_WF_REPORT_PARAMS)
if (get_ldev(mdev)) { /* implicit state.disk >= D_INCONSISTENT */
dt = mdev->ldev->dc.disk_timeout * HZ / 10;
put_ldev(mdev);
}
et = min_not_zero(dt, ent);
if (!et)
return; /* Recurring timer stopped */
now = jiffies;
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);
mod_timer(&mdev->request_timer, now + 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);
}
/* The request is considered timed out, if
* - we have some effective timeout from the configuration,
* with above state restrictions applied,
* - the oldest request is waiting for a response from the network
* resp. the local disk,
* - the oldest request is in fact older than the effective timeout,
* - the connection was established (resp. disk was attached)
* for longer than the timeout already.
* Note that for 32bit jiffies and very stable connections/disks,
* we may have a wrap around, which is catched by
* !time_in_range(now, last_..._jif, last_..._jif + timeout).
*
* Side effect: once per 32bit wrap-around interval, which means every
* ~198 days with 250 HZ, we have a window where the timeout would need
* to expire twice (worst case) to become effective. Good enough.
*/
if (ent && req->rq_state & RQ_NET_PENDING &&
time_after(now, req->start_time + ent) &&
!time_in_range(now, mdev->last_reconnect_jif, mdev->last_reconnect_jif + ent)) {
dev_warn(DEV, "Remote failed to finish a request within ko-count * timeout\n");
_drbd_set_state(_NS(mdev, conn, C_TIMEOUT), CS_VERBOSE | CS_HARD, NULL);
}
if (dt && req->rq_state & RQ_LOCAL_PENDING &&
time_after(now, req->start_time + dt) &&
!time_in_range(now, mdev->last_reattach_jif, mdev->last_reattach_jif + dt)) {
dev_warn(DEV, "Local backing device failed to meet the disk-timeout\n");
__drbd_chk_io_error(mdev, 1);
}
nt = (time_after(now, req->start_time + et) ? now : req->start_time) + et;
spin_unlock_irq(&mdev->req_lock);
mod_timer(&mdev->request_timer, nt);
}

19
drivers/block/drbd/drbd_req.h
View File

@ -105,6 +105,7 @@ enum drbd_req_event {
read_completed_with_error,
read_ahead_completed_with_error,
write_completed_with_error,
abort_disk_io,
completed_ok,
resend,
fail_frozen_disk_io,
@ -118,18 +119,21 @@ enum drbd_req_event {
* same time, so we should hold the request lock anyways.
*/
enum drbd_req_state_bits {
/* 210
* 000: no local possible
* 001: to be submitted
/* 3210
* 0000: no local possible
* 0001: to be submitted
* UNUSED, we could map: 011: submitted, completion still pending
* 110: completed ok
* 010: completed with error
* 0110: completed ok
* 0010: completed with error
* 1001: Aborted (before completion)
* 1x10: Aborted and completed -> free
*/
__RQ_LOCAL_PENDING,
__RQ_LOCAL_COMPLETED,
__RQ_LOCAL_OK,
__RQ_LOCAL_ABORTED,
/* 76543
/* 87654
* 00000: no network possible
* 00001: to be send
* 00011: to be send, on worker queue
@ -199,8 +203,9 @@ enum drbd_req_state_bits {
#define RQ_LOCAL_PENDING (1UL << __RQ_LOCAL_PENDING)
#define RQ_LOCAL_COMPLETED (1UL << __RQ_LOCAL_COMPLETED)
#define RQ_LOCAL_OK (1UL << __RQ_LOCAL_OK)
#define RQ_LOCAL_ABORTED (1UL << __RQ_LOCAL_ABORTED)
#define RQ_LOCAL_MASK ((RQ_LOCAL_OK << 1)-1) /* 0x07 */
#define RQ_LOCAL_MASK ((RQ_LOCAL_ABORTED << 1)-1)
#define RQ_NET_PENDING (1UL << __RQ_NET_PENDING)
#define RQ_NET_QUEUED (1UL << __RQ_NET_QUEUED)

31
drivers/block/drbd/drbd_worker.c
View File

@ -70,11 +70,29 @@ rwlock_t global_state_lock;
void drbd_md_io_complete(struct bio *bio, int error)
{
struct drbd_md_io *md_io;
struct drbd_conf *mdev;
md_io = (struct drbd_md_io *)bio->bi_private;
mdev = container_of(md_io, struct drbd_conf, md_io);
md_io->error = error;
complete(&md_io->event);
/* We grabbed an extra reference in _drbd_md_sync_page_io() to be able
* to timeout on the lower level device, and eventually detach from it.
* If this io completion runs after that timeout expired, this
* drbd_md_put_buffer() may allow us to finally try and re-attach.
* During normal operation, this only puts that extra reference
* down to 1 again.
* Make sure we first drop the reference, and only then signal
* completion, or we may (in drbd_al_read_log()) cycle so fast into the
* next drbd_md_sync_page_io(), that we trigger the
* ASSERT(atomic_read(&mdev->md_io_in_use) == 1) there.
*/
drbd_md_put_buffer(mdev);
md_io->done = 1;
wake_up(&mdev->misc_wait);
bio_put(bio);
put_ldev(mdev);
}
/* reads on behalf of the partner,
@ -226,6 +244,7 @@ void drbd_endio_pri(struct bio *bio, int error)
spin_lock_irqsave(&mdev->req_lock, flags);
__req_mod(req, what, &m);
spin_unlock_irqrestore(&mdev->req_lock, flags);
put_ldev(mdev);
if (m.bio)
complete_master_bio(mdev, &m);
@ -290,7 +309,7 @@ void drbd_csum_bio(struct drbd_conf *mdev, struct crypto_hash *tfm, struct bio *
sg_init_table(&sg, 1);
crypto_hash_init(&desc);
__bio_for_each_segment(bvec, bio, i, 0) {
bio_for_each_segment(bvec, bio, i) {
sg_set_page(&sg, bvec->bv_page, bvec->bv_len, bvec->bv_offset);
crypto_hash_update(&desc, &sg, sg.length);
}
@ -728,7 +747,7 @@ int w_start_resync(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
}
drbd_start_resync(mdev, C_SYNC_SOURCE);
clear_bit(AHEAD_TO_SYNC_SOURCE, &mdev->current_epoch->flags);
clear_bit(AHEAD_TO_SYNC_SOURCE, &mdev->flags);
return 1;
}
@ -1519,14 +1538,14 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
}
drbd_state_lock(mdev);
write_lock_irq(&global_state_lock);
if (!get_ldev_if_state(mdev, D_NEGOTIATING)) {
write_unlock_irq(&global_state_lock);
drbd_state_unlock(mdev);
return;
}
write_lock_irq(&global_state_lock);
ns = mdev->state;
ns.i = mdev->state.i;
ns.aftr_isp = !_drbd_may_sync_now(mdev);

161
drivers/block/floppy.c
View File

@ -551,7 +551,7 @@ static void floppy_ready(void);
static void floppy_start(void);
static void process_fd_request(void);
static void recalibrate_floppy(void);
static void floppy_shutdown(unsigned long);
static void floppy_shutdown(struct work_struct *);
static int floppy_request_regions(int);
static void floppy_release_regions(int);
@ -588,6 +588,8 @@ static int buffer_max = -1;
static struct floppy_fdc_state fdc_state[N_FDC];
static int fdc; /* current fdc */
static struct workqueue_struct *floppy_wq;
static struct floppy_struct *_floppy = floppy_type;
static unsigned char current_drive;
static long current_count_sectors;
@ -629,16 +631,15 @@ static inline void set_debugt(void) { }
static inline void debugt(const char *func, const char *msg) { }
#endif /* DEBUGT */
typedef void (*timeout_fn)(unsigned long);
static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0);
static DECLARE_DELAYED_WORK(fd_timeout, floppy_shutdown);
static const char *timeout_message;
static void is_alive(const char *func, const char *message)
{
/* this routine checks whether the floppy driver is "alive" */
if (test_bit(0, &fdc_busy) && command_status < 2 &&
!timer_pending(&fd_timeout)) {
!delayed_work_pending(&fd_timeout)) {
DPRINT("%s: timeout handler died. %s\n", func, message);
}
}
@ -666,15 +667,18 @@ static int output_log_pos;
static void __reschedule_timeout(int drive, const char *message)
{
unsigned long delay;
if (drive == current_reqD)
drive = current_drive;
del_timer(&fd_timeout);
if (drive < 0 || drive >= N_DRIVE) {
fd_timeout.expires = jiffies + 20UL * HZ;
delay = 20UL * HZ;
drive = 0;
} else
fd_timeout.expires = jiffies + UDP->timeout;
add_timer(&fd_timeout);
delay = UDP->timeout;
queue_delayed_work(floppy_wq, &fd_timeout, delay);
if (UDP->flags & FD_DEBUG)
DPRINT("reschedule timeout %s\n", message);
timeout_message = message;
@ -872,7 +876,7 @@ static int lock_fdc(int drive, bool interruptible)
command_status = FD_COMMAND_NONE;
__reschedule_timeout(drive, "lock fdc");
reschedule_timeout(drive, "lock fdc");
set_fdc(drive);
return 0;
}
@ -880,23 +884,15 @@ static int lock_fdc(int drive, bool interruptible)
/* unlocks the driver */
static void unlock_fdc(void)
{
unsigned long flags;
raw_cmd = NULL;
if (!test_bit(0, &fdc_busy))
DPRINT("FDC access conflict!\n");
if (do_floppy)
DPRINT("device interrupt still active at FDC release: %pf!\n",
do_floppy);
raw_cmd = NULL;
command_status = FD_COMMAND_NONE;
spin_lock_irqsave(&floppy_lock, flags);
del_timer(&fd_timeout);
__cancel_delayed_work(&fd_timeout);
do_floppy = NULL;
cont = NULL;
clear_bit(0, &fdc_busy);
if (current_req || set_next_request())
do_fd_request(current_req->q);
spin_unlock_irqrestore(&floppy_lock, flags);
wake_up(&fdc_wait);
}
@ -968,26 +964,24 @@ static DECLARE_WORK(floppy_work, NULL);
static void schedule_bh(void (*handler)(void))
{
WARN_ON(work_pending(&floppy_work));
PREPARE_WORK(&floppy_work, (work_func_t)handler);
schedule_work(&floppy_work);
queue_work(floppy_wq, &floppy_work);
}
static DEFINE_TIMER(fd_timer, NULL, 0, 0);
static DECLARE_DELAYED_WORK(fd_timer, NULL);
static void cancel_activity(void)
{
unsigned long flags;
spin_lock_irqsave(&floppy_lock, flags);
do_floppy = NULL;
PREPARE_WORK(&floppy_work, (work_func_t)empty);
del_timer(&fd_timer);
spin_unlock_irqrestore(&floppy_lock, flags);
cancel_delayed_work_sync(&fd_timer);
cancel_work_sync(&floppy_work);
}
/* this function makes sure that the disk stays in the drive during the
* transfer */
static void fd_watchdog(void)
static void fd_watchdog(struct work_struct *arg)
{
debug_dcl(DP->flags, "calling disk change from watchdog\n");
@ -997,21 +991,20 @@ static void fd_watchdog(void)
cont->done(0);
reset_fdc();
} else {
del_timer(&fd_timer);
fd_timer.function = (timeout_fn)fd_watchdog;
fd_timer.expires = jiffies + HZ / 10;
add_timer(&fd_timer);
cancel_delayed_work(&fd_timer);
PREPARE_DELAYED_WORK(&fd_timer, fd_watchdog);
queue_delayed_work(floppy_wq, &fd_timer, HZ / 10);
}
}
static void main_command_interrupt(void)
{
del_timer(&fd_timer);
cancel_delayed_work(&fd_timer);
cont->interrupt();
}
/* waits for a delay (spinup or select) to pass */
static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
static int fd_wait_for_completion(unsigned long expires, work_func_t function)
{
if (FDCS->reset) {
reset_fdc(); /* do the reset during sleep to win time
@ -1020,11 +1013,10 @@ static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
return 1;
}
if (time_before(jiffies, delay)) {
del_timer(&fd_timer);
fd_timer.function = function;
fd_timer.expires = delay;
add_timer(&fd_timer);
if (time_before(jiffies, expires)) {
cancel_delayed_work(&fd_timer);
PREPARE_DELAYED_WORK(&fd_timer, function);
queue_delayed_work(floppy_wq, &fd_timer, expires - jiffies);
return 1;
}
return 0;
@ -1342,7 +1334,7 @@ static int fdc_dtr(void)
*/
FDCS->dtr = raw_cmd->rate & 3;
return fd_wait_for_completion(jiffies + 2UL * HZ / 100,
(timeout_fn)floppy_ready);
(work_func_t)floppy_ready);
} /* fdc_dtr */
static void tell_sector(void)
@ -1447,7 +1439,7 @@ static void setup_rw_floppy(void)
int flags;
int dflags;
unsigned long ready_date;
timeout_fn function;
work_func_t function;
flags = raw_cmd->flags;
if (flags & (FD_RAW_READ | FD_RAW_WRITE))
@ -1461,9 +1453,9 @@ static void setup_rw_floppy(void)
*/
if (time_after(ready_date, jiffies + DP->select_delay)) {
ready_date -= DP->select_delay;
function = (timeout_fn)floppy_start;
function = (work_func_t)floppy_start;
} else
function = (timeout_fn)setup_rw_floppy;
function = (work_func_t)setup_rw_floppy;
/* wait until the floppy is spinning fast enough */
if (fd_wait_for_completion(ready_date, function))
@ -1493,7 +1485,7 @@ static void setup_rw_floppy(void)
inr = result();
cont->interrupt();
} else if (flags & FD_RAW_NEED_DISK)
fd_watchdog();
fd_watchdog(NULL);
}
static int blind_seek;
@ -1802,20 +1794,22 @@ static void show_floppy(void)
pr_info("do_floppy=%pf\n", do_floppy);
if (work_pending(&floppy_work))
pr_info("floppy_work.func=%pf\n", floppy_work.func);
if (timer_pending(&fd_timer))
pr_info("fd_timer.function=%pf\n", fd_timer.function);
if (timer_pending(&fd_timeout)) {
pr_info("timer_function=%pf\n", fd_timeout.function);
pr_info("expires=%lu\n", fd_timeout.expires - jiffies);
pr_info("now=%lu\n", jiffies);
}
if (delayed_work_pending(&fd_timer))
pr_info("delayed work.function=%p expires=%ld\n",
fd_timer.work.func,
fd_timer.timer.expires - jiffies);
if (delayed_work_pending(&fd_timeout))
pr_info("timer_function=%p expires=%ld\n",
fd_timeout.work.func,
fd_timeout.timer.expires - jiffies);
pr_info("cont=%p\n", cont);
pr_info("current_req=%p\n", current_req);
pr_info("command_status=%d\n", command_status);
pr_info("\n");
}
static void floppy_shutdown(unsigned long data)
static void floppy_shutdown(struct work_struct *arg)
{
unsigned long flags;
@ -1868,7 +1862,7 @@ static int start_motor(void (*function)(void))
/* wait_for_completion also schedules reset if needed. */
return fd_wait_for_completion(DRS->select_date + DP->select_delay,
(timeout_fn)function);
(work_func_t)function);
}
static void floppy_ready(void)
@ -2821,7 +2815,6 @@ do_request:
spin_lock_irq(&floppy_lock);
pending = set_next_request();
spin_unlock_irq(&floppy_lock);
if (!pending) {
do_floppy = NULL;
unlock_fdc();
@ -2898,13 +2891,15 @@ static void do_fd_request(struct request_queue *q)
current_req->cmd_flags))
return;
if (test_bit(0, &fdc_busy)) {
if (test_and_set_bit(0, &fdc_busy)) {
/* fdc busy, this new request will be treated when the
current one is done */
is_alive(__func__, "old request running");
return;
}
lock_fdc(MAXTIMEOUT, false);
command_status = FD_COMMAND_NONE;
__reschedule_timeout(MAXTIMEOUT, "fd_request");
set_fdc(0);
process_fd_request();
is_alive(__func__, "");
}
@ -3612,9 +3607,7 @@ static int floppy_release(struct gendisk *disk, fmode_t mode)
mutex_lock(&floppy_mutex);
mutex_lock(&open_lock);
if (UDRS->fd_ref < 0)
UDRS->fd_ref = 0;
else if (!UDRS->fd_ref--) {
if (!UDRS->fd_ref--) {
DPRINT("floppy_release with fd_ref == 0");
UDRS->fd_ref = 0;
}
@ -3650,13 +3643,7 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
set_bit(FD_VERIFY_BIT, &UDRS->flags);
}
if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL)))
goto out2;
if (mode & FMODE_EXCL)
UDRS->fd_ref = -1;
else
UDRS->fd_ref++;
UDRS->fd_ref++;
opened_bdev[drive] = bdev;
@ -3719,10 +3706,8 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
mutex_unlock(&floppy_mutex);
return 0;
out:
if (UDRS->fd_ref < 0)
UDRS->fd_ref = 0;
else
UDRS->fd_ref--;
UDRS->fd_ref--;
if (!UDRS->fd_ref)
opened_bdev[drive] = NULL;
out2:
@ -4159,10 +4144,16 @@ static int __init floppy_init(void)
goto out_put_disk;
}
floppy_wq = alloc_ordered_workqueue("floppy", 0);
if (!floppy_wq) {
err = -ENOMEM;
goto out_put_disk;
}
disks[dr]->queue = blk_init_queue(do_fd_request, &floppy_lock);
if (!disks[dr]->queue) {
err = -ENOMEM;
goto out_put_disk;
goto out_destroy_workq;
}
blk_queue_max_hw_sectors(disks[dr]->queue, 64);
@ -4213,7 +4204,7 @@ static int __init floppy_init(void)
use_virtual_dma = can_use_virtual_dma & 1;
fdc_state[0].address = FDC1;
if (fdc_state[0].address == -1) {
del_timer_sync(&fd_timeout);
cancel_delayed_work(&fd_timeout);
err = -ENODEV;
goto out_unreg_region;
}
@ -4224,7 +4215,7 @@ static int __init floppy_init(void)
fdc = 0; /* reset fdc in case of unexpected interrupt */
err = floppy_grab_irq_and_dma();
if (err) {
del_timer_sync(&fd_timeout);
cancel_delayed_work(&fd_timeout);
err = -EBUSY;
goto out_unreg_region;
}
@ -4281,13 +4272,13 @@ static int __init floppy_init(void)
user_reset_fdc(-1, FD_RESET_ALWAYS, false);
}
fdc = 0;
del_timer_sync(&fd_timeout);
cancel_delayed_work(&fd_timeout);
current_drive = 0;
initialized = true;
if (have_no_fdc) {
DPRINT("no floppy controllers found\n");
err = have_no_fdc;
goto out_flush_work;
goto out_release_dma;
}
for (drive = 0; drive < N_DRIVE; drive++) {
@ -4302,7 +4293,7 @@ static int __init floppy_init(void)
err = platform_device_register(&floppy_device[drive]);
if (err)
goto out_flush_work;
goto out_release_dma;
err = device_create_file(&floppy_device[drive].dev,
&dev_attr_cmos);
@ -4320,13 +4311,14 @@ static int __init floppy_init(void)
out_unreg_platform_dev:
platform_device_unregister(&floppy_device[drive]);
out_flush_work:
flush_work_sync(&floppy_work);
out_release_dma:
if (atomic_read(&usage_count))
floppy_release_irq_and_dma();
out_unreg_region:
blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
platform_driver_unregister(&floppy_driver);
out_destroy_workq:
destroy_workqueue(floppy_wq);
out_unreg_blkdev:
unregister_blkdev(FLOPPY_MAJOR, "fd");
out_put_disk:
@ -4397,7 +4389,7 @@ static int floppy_grab_irq_and_dma(void)
* We might have scheduled a free_irq(), wait it to
* drain first:
*/
flush_work_sync(&floppy_work);
flush_workqueue(floppy_wq);
if (fd_request_irq()) {
DPRINT("Unable to grab IRQ%d for the floppy driver\n",
@ -4488,9 +4480,9 @@ static void floppy_release_irq_and_dma(void)
pr_info("motor off timer %d still active\n", drive);
#endif
if (timer_pending(&fd_timeout))
if (delayed_work_pending(&fd_timeout))
pr_info("floppy timer still active:%s\n", timeout_message);
if (timer_pending(&fd_timer))
if (delayed_work_pending(&fd_timer))
pr_info("auxiliary floppy timer still active\n");
if (work_pending(&floppy_work))
pr_info("work still pending\n");
@ -4560,8 +4552,9 @@ static void __exit floppy_module_exit(void)
put_disk(disks[drive]);
}
del_timer_sync(&fd_timeout);
del_timer_sync(&fd_timer);
cancel_delayed_work_sync(&fd_timeout);
cancel_delayed_work_sync(&fd_timer);
destroy_workqueue(floppy_wq);
if (atomic_read(&usage_count))
floppy_release_irq_and_dma();

44
drivers/block/xen-blkfront.c
View File

@ -526,6 +526,14 @@ static int xen_translate_vdev(int vdevice, int *minor, unsigned int *offset)
return 0;
}
static char *encode_disk_name(char *ptr, unsigned int n)
{
if (n >= 26)
ptr = encode_disk_name(ptr, n / 26 - 1);
*ptr = 'a' + n % 26;
return ptr + 1;
}
static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
struct blkfront_info *info,
u16 vdisk_info, u16 sector_size)
@ -536,6 +544,7 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
unsigned int offset;
int minor;
int nr_parts;
char *ptr;
BUG_ON(info->gd != NULL);
BUG_ON(info->rq != NULL);
@ -560,7 +569,11 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
"emulated IDE disks,\n\t choose an xvd device name"
"from xvde on\n", info->vdevice);
}
err = -ENODEV;
if (minor >> MINORBITS) {
pr_warn("blkfront: %#x's minor (%#x) out of range; ignoring\n",
info->vdevice, minor);
return -ENODEV;
}
if ((minor % nr_parts) == 0)
nr_minors = nr_parts;
@ -574,23 +587,14 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
if (gd == NULL)
goto release;
if (nr_minors > 1) {
if (offset < 26)
sprintf(gd->disk_name, "%s%c", DEV_NAME, 'a' + offset);
else
sprintf(gd->disk_name, "%s%c%c", DEV_NAME,
'a' + ((offset / 26)-1), 'a' + (offset % 26));
} else {
if (offset < 26)
sprintf(gd->disk_name, "%s%c%d", DEV_NAME,
'a' + offset,
minor & (nr_parts - 1));
else
sprintf(gd->disk_name, "%s%c%c%d", DEV_NAME,
'a' + ((offset / 26) - 1),
'a' + (offset % 26),
minor & (nr_parts - 1));
}
strcpy(gd->disk_name, DEV_NAME);
ptr = encode_disk_name(gd->disk_name + sizeof(DEV_NAME) - 1, offset);
BUG_ON(ptr >= gd->disk_name + DISK_NAME_LEN);
if (nr_minors > 1)
*ptr = 0;
else
snprintf(ptr, gd->disk_name + DISK_NAME_LEN - ptr,
"%d", minor & (nr_parts - 1));
gd->major = XENVBD_MAJOR;
gd->first_minor = minor;
@ -1496,7 +1500,9 @@ module_init(xlblk_init);
static void __exit xlblk_exit(void)
{
return xenbus_unregister_driver(&blkfront_driver);
xenbus_unregister_driver(&blkfront_driver);
unregister_blkdev(XENVBD_MAJOR, DEV_NAME);
kfree(minors);
}
module_exit(xlblk_exit);

6
include/linux/drbd.h
View File

@ -53,7 +53,7 @@
extern const char *drbd_buildtag(void);
#define REL_VERSION "8.3.11"
#define REL_VERSION "8.3.13"
#define API_VERSION 88
#define PRO_VERSION_MIN 86
#define PRO_VERSION_MAX 96
@ -112,8 +112,8 @@ enum drbd_ret_code {
ERR_OPEN_MD_DISK = 105,
ERR_DISK_NOT_BDEV = 107,
ERR_MD_NOT_BDEV = 108,
ERR_DISK_TO_SMALL = 111,
ERR_MD_DISK_TO_SMALL = 112,
ERR_DISK_TOO_SMALL = 111,
ERR_MD_DISK_TOO_SMALL = 112,
ERR_BDCLAIM_DISK = 114,
ERR_BDCLAIM_MD_DISK = 115,
ERR_MD_IDX_INVALID = 116,

7
include/linux/drbd_limits.h
View File

@ -48,6 +48,11 @@
#define DRBD_TIMEOUT_MAX 600
#define DRBD_TIMEOUT_DEF 60 /* 6 seconds */
/* If backing disk takes longer than disk_timeout, mark the disk as failed */
#define DRBD_DISK_TIMEOUT_MIN 0 /* 0 = disabled */
#define DRBD_DISK_TIMEOUT_MAX 6000 /* 10 Minutes */
#define DRBD_DISK_TIMEOUT_DEF 0 /* disabled */
/* active connection retries when C_WF_CONNECTION */
#define DRBD_CONNECT_INT_MIN 1
#define DRBD_CONNECT_INT_MAX 120
@ -60,7 +65,7 @@
/* timeout for the ping packets.*/
#define DRBD_PING_TIMEO_MIN 1
#define DRBD_PING_TIMEO_MAX 100
#define DRBD_PING_TIMEO_MAX 300
#define DRBD_PING_TIMEO_DEF 5
/* max number of write requests between write barriers */

5
include/linux/drbd_nl.h
View File

@ -31,9 +31,12 @@ NL_PACKET(disk_conf, 3,
NL_INTEGER( 56, T_MAY_IGNORE, max_bio_bvecs)
NL_BIT( 57, T_MAY_IGNORE, no_disk_barrier)
NL_BIT( 58, T_MAY_IGNORE, no_disk_drain)
NL_INTEGER( 89, T_MAY_IGNORE, disk_timeout)
)
NL_PACKET(detach, 4, )
NL_PACKET(detach, 4,
NL_BIT( 88, T_MANDATORY, detach_force)
)
NL_PACKET(net_conf, 5,
NL_STRING( 8, T_MANDATORY, my_addr, 128)