static void bch_data_insert_keys(struct closure *cl)
{
- struct search *s = container_of(cl, struct search, btree);
+ struct data_insert_op *op = container_of(cl, struct data_insert_op, cl);
atomic_t *journal_ref = NULL;
- struct bkey *replace_key = s->replace ? &s->replace_key : NULL;
+ struct bkey *replace_key = op->replace ? &op->replace_key : NULL;
int ret;
/*
closure_sync(&s->cl);
#endif
- if (s->write)
- journal_ref = bch_journal(s->c, &s->insert_keys,
- s->flush_journal
- ? &s->cl : NULL);
+ if (!op->replace)
+ journal_ref = bch_journal(op->c, &op->insert_keys,
+ op->flush_journal ? cl : NULL);
- ret = bch_btree_insert(s->c, &s->insert_keys,
+ ret = bch_btree_insert(op->c, &op->insert_keys,
journal_ref, replace_key);
if (ret == -ESRCH) {
- s->insert_collision = true;
+ op->replace_collision = true;
} else if (ret) {
- s->error = -ENOMEM;
- s->insert_data_done = true;
+ op->error = -ENOMEM;
+ op->insert_data_done = true;
}
if (journal_ref)
atomic_dec_bug(journal_ref);
- if (!s->insert_data_done)
+ if (!op->insert_data_done)
continue_at(cl, bch_data_insert_start, bcache_wq);
- bch_keylist_free(&s->insert_keys);
+ bch_keylist_free(&op->insert_keys);
closure_return(cl);
}
*
* If s->writeback is true, will not fail.
*/
-static bool bch_alloc_sectors(struct bkey *k, unsigned sectors,
- struct search *s)
+static bool bch_alloc_sectors(struct data_insert_op *op,
+ struct bkey *k, unsigned sectors)
{
- struct cache_set *c = s->c;
+ struct cache_set *c = op->c;
struct open_bucket *b;
BKEY_PADDED(key) alloc;
unsigned i;
bkey_init(&alloc.key);
spin_lock(&c->data_bucket_lock);
- while (!(b = pick_data_bucket(c, k, s->task, &alloc.key))) {
- unsigned watermark = s->write_prio
+ while (!(b = pick_data_bucket(c, k, op->task, &alloc.key))) {
+ unsigned watermark = op->write_prio
? WATERMARK_MOVINGGC
: WATERMARK_NONE;
spin_unlock(&c->data_bucket_lock);
if (bch_bucket_alloc_set(c, watermark, &alloc.key,
- 1, s->writeback))
+ 1, op->writeback))
return false;
spin_lock(&c->data_bucket_lock);
*/
list_move_tail(&b->list, &c->data_buckets);
bkey_copy_key(&b->key, k);
- b->last = s->task;
+ b->last = op->task;
b->sectors_free -= sectors;
static void bch_data_invalidate(struct closure *cl)
{
- struct search *s = container_of(cl, struct search, btree);
- struct bio *bio = s->cache_bio;
+ struct data_insert_op *op = container_of(cl, struct data_insert_op, cl);
+ struct bio *bio = op->bio;
pr_debug("invalidating %i sectors from %llu",
bio_sectors(bio), (uint64_t) bio->bi_sector);
while (bio_sectors(bio)) {
unsigned len = min(bio_sectors(bio), 1U << 14);
- if (bch_keylist_realloc(&s->insert_keys, 0, s->c))
+ if (bch_keylist_realloc(&op->insert_keys, 0, op->c))
goto out;
bio->bi_sector += len;
bio->bi_size -= len << 9;
- bch_keylist_add(&s->insert_keys,
- &KEY(s->inode, bio->bi_sector, len));
+ bch_keylist_add(&op->insert_keys,
+ &KEY(op->inode, bio->bi_sector, len));
}
- s->insert_data_done = true;
+ op->insert_data_done = true;
bio_put(bio);
out:
continue_at(cl, bch_data_insert_keys, bcache_wq);
static void bch_data_insert_error(struct closure *cl)
{
- struct search *s = container_of(cl, struct search, btree);
+ struct data_insert_op *op = container_of(cl, struct data_insert_op, cl);
/*
* Our data write just errored, which means we've got a bunch of keys to
* from the keys we'll accomplish just that.
*/
- struct bkey *src = s->insert_keys.keys, *dst = s->insert_keys.keys;
+ struct bkey *src = op->insert_keys.keys, *dst = op->insert_keys.keys;
- while (src != s->insert_keys.top) {
+ while (src != op->insert_keys.top) {
struct bkey *n = bkey_next(src);
SET_KEY_PTRS(src, 0);
src = n;
}
- s->insert_keys.top = dst;
+ op->insert_keys.top = dst;
bch_data_insert_keys(cl);
}
static void bch_data_insert_endio(struct bio *bio, int error)
{
struct closure *cl = bio->bi_private;
- struct search *s = container_of(cl, struct search, btree);
+ struct data_insert_op *op = container_of(cl, struct data_insert_op, cl);
if (error) {
/* TODO: We could try to recover from this. */
- if (s->writeback)
- s->error = error;
- else if (s->write)
+ if (op->writeback)
+ op->error = error;
+ else if (!op->replace)
set_closure_fn(cl, bch_data_insert_error, bcache_wq);
else
set_closure_fn(cl, NULL, NULL);
}
- bch_bbio_endio(s->c, bio, error, "writing data to cache");
+ bch_bbio_endio(op->c, bio, error, "writing data to cache");
}
static void bch_data_insert_start(struct closure *cl)
{
- struct search *s = container_of(cl, struct search, btree);
- struct bio *bio = s->cache_bio, *n;
+ struct data_insert_op *op = container_of(cl, struct data_insert_op, cl);
+ struct bio *bio = op->bio, *n;
- if (s->bypass)
+ if (op->bypass)
return bch_data_invalidate(cl);
- if (atomic_sub_return(bio_sectors(bio), &s->c->sectors_to_gc) < 0) {
- set_gc_sectors(s->c);
- wake_up_gc(s->c);
+ if (atomic_sub_return(bio_sectors(bio), &op->c->sectors_to_gc) < 0) {
+ set_gc_sectors(op->c);
+ wake_up_gc(op->c);
}
/*
do {
unsigned i;
struct bkey *k;
- struct bio_set *split = s->d
- ? s->d->bio_split : s->c->bio_split;
+ struct bio_set *split = op->c->bio_split;
/* 1 for the device pointer and 1 for the chksum */
- if (bch_keylist_realloc(&s->insert_keys,
- 1 + (s->csum ? 1 : 0),
- s->c))
+ if (bch_keylist_realloc(&op->insert_keys,
+ 1 + (op->csum ? 1 : 0),
+ op->c))
continue_at(cl, bch_data_insert_keys, bcache_wq);
- k = s->insert_keys.top;
+ k = op->insert_keys.top;
bkey_init(k);
- SET_KEY_INODE(k, s->inode);
+ SET_KEY_INODE(k, op->inode);
SET_KEY_OFFSET(k, bio->bi_sector);
- if (!bch_alloc_sectors(k, bio_sectors(bio), s))
+ if (!bch_alloc_sectors(op, k, bio_sectors(bio)))
goto err;
n = bch_bio_split(bio, KEY_SIZE(k), GFP_NOIO, split);
n->bi_end_io = bch_data_insert_endio;
n->bi_private = cl;
- if (s->writeback) {
+ if (op->writeback) {
SET_KEY_DIRTY(k, true);
for (i = 0; i < KEY_PTRS(k); i++)
- SET_GC_MARK(PTR_BUCKET(s->c, k, i),
+ SET_GC_MARK(PTR_BUCKET(op->c, k, i),
GC_MARK_DIRTY);
}
- SET_KEY_CSUM(k, s->csum);
+ SET_KEY_CSUM(k, op->csum);
if (KEY_CSUM(k))
bio_csum(n, k);
trace_bcache_cache_insert(k);
- bch_keylist_push(&s->insert_keys);
+ bch_keylist_push(&op->insert_keys);
n->bi_rw |= REQ_WRITE;
- bch_submit_bbio(n, s->c, k, 0);
+ bch_submit_bbio(n, op->c, k, 0);
} while (n != bio);
- s->insert_data_done = true;
+ op->insert_data_done = true;
continue_at(cl, bch_data_insert_keys, bcache_wq);
err:
/* bch_alloc_sectors() blocks if s->writeback = true */
- BUG_ON(s->writeback);
+ BUG_ON(op->writeback);
/*
* But if it's not a writeback write we'd rather just bail out if
* we might be starving btree writes for gc or something.
*/
- if (s->write) {
+ if (!op->replace) {
/*
* Writethrough write: We can't complete the write until we've
* updated the index. But we don't want to delay the write while
* we wait for buckets to be freed up, so just invalidate the
* rest of the write.
*/
- s->bypass = true;
+ op->bypass = true;
return bch_data_invalidate(cl);
} else {
/*
* From a cache miss, we can just insert the keys for the data
* we have written or bail out if we didn't do anything.
*/
- s->insert_data_done = true;
+ op->insert_data_done = true;
bio_put(bio);
- if (!bch_keylist_empty(&s->insert_keys))
+ if (!bch_keylist_empty(&op->insert_keys))
continue_at(cl, bch_data_insert_keys, bcache_wq);
else
closure_return(cl);
*/
void bch_data_insert(struct closure *cl)
{
- struct search *s = container_of(cl, struct search, btree);
+ struct data_insert_op *op = container_of(cl, struct data_insert_op, cl);
- bch_keylist_init(&s->insert_keys);
- bio_get(s->cache_bio);
+ trace_bcache_write(op->bio, op->writeback, op->bypass);
+
+ bch_keylist_init(&op->insert_keys);
+ bio_get(op->bio);
bch_data_insert_start(cl);
}
+/* Congested? */
+
+unsigned bch_get_congested(struct cache_set *c)
+{
+ int i;
+ long rand;
+
+ if (!c->congested_read_threshold_us &&
+ !c->congested_write_threshold_us)
+ return 0;
+
+ i = (local_clock_us() - c->congested_last_us) / 1024;
+ if (i < 0)
+ return 0;
+
+ i += atomic_read(&c->congested);
+ if (i >= 0)
+ return 0;
+
+ i += CONGESTED_MAX;
+
+ if (i > 0)
+ i = fract_exp_two(i, 6);
+
+ rand = get_random_int();
+ i -= bitmap_weight(&rand, BITS_PER_LONG);
+
+ return i > 0 ? i : 1;
+}
+
+static void add_sequential(struct task_struct *t)
+{
+ ewma_add(t->sequential_io_avg,
+ t->sequential_io, 8, 0);
+
+ t->sequential_io = 0;
+}
+
+static struct hlist_head *iohash(struct cached_dev *dc, uint64_t k)
+{
+ return &dc->io_hash[hash_64(k, RECENT_IO_BITS)];
+}
+
+static bool check_should_bypass(struct cached_dev *dc, struct bio *bio)
+{
+ struct cache_set *c = dc->disk.c;
+ unsigned mode = cache_mode(dc, bio);
+ unsigned sectors, congested = bch_get_congested(c);
+ struct task_struct *task = current;
+
+ if (atomic_read(&dc->disk.detaching) ||
+ c->gc_stats.in_use > CUTOFF_CACHE_ADD ||
+ (bio->bi_rw & REQ_DISCARD))
+ goto skip;
+
+ if (mode == CACHE_MODE_NONE ||
+ (mode == CACHE_MODE_WRITEAROUND &&
+ (bio->bi_rw & REQ_WRITE)))
+ goto skip;
+
+ if (bio->bi_sector & (c->sb.block_size - 1) ||
+ bio_sectors(bio) & (c->sb.block_size - 1)) {
+ pr_debug("skipping unaligned io");
+ goto skip;
+ }
+
+ if (!congested && !dc->sequential_cutoff)
+ goto rescale;
+
+ if (!congested &&
+ mode == CACHE_MODE_WRITEBACK &&
+ (bio->bi_rw & REQ_WRITE) &&
+ (bio->bi_rw & REQ_SYNC))
+ goto rescale;
+
+ if (dc->sequential_merge) {
+ struct io *i;
+
+ spin_lock(&dc->io_lock);
+
+ hlist_for_each_entry(i, iohash(dc, bio->bi_sector), hash)
+ if (i->last == bio->bi_sector &&
+ time_before(jiffies, i->jiffies))
+ goto found;
+
+ i = list_first_entry(&dc->io_lru, struct io, lru);
+
+ add_sequential(task);
+ i->sequential = 0;
+found:
+ if (i->sequential + bio->bi_size > i->sequential)
+ i->sequential += bio->bi_size;
+
+ i->last = bio_end_sector(bio);
+ i->jiffies = jiffies + msecs_to_jiffies(5000);
+ task->sequential_io = i->sequential;
+
+ hlist_del(&i->hash);
+ hlist_add_head(&i->hash, iohash(dc, i->last));
+ list_move_tail(&i->lru, &dc->io_lru);
+
+ spin_unlock(&dc->io_lock);
+ } else {
+ task->sequential_io = bio->bi_size;
+
+ add_sequential(task);
+ }
+
+ sectors = max(task->sequential_io,
+ task->sequential_io_avg) >> 9;
+
+ if (dc->sequential_cutoff &&
+ sectors >= dc->sequential_cutoff >> 9) {
+ trace_bcache_bypass_sequential(bio);
+ goto skip;
+ }
+
+ if (congested && sectors >= congested) {
+ trace_bcache_bypass_congested(bio);
+ goto skip;
+ }
+
+rescale:
+ bch_rescale_priorities(c, bio_sectors(bio));
+ return false;
+skip:
+ bch_mark_sectors_bypassed(c, dc, bio_sectors(bio));
+ return true;
+}
+
/* Cache lookup */
+struct search {
+ /* Stack frame for bio_complete */
+ struct closure cl;
+
+ struct bcache_device *d;
+
+ struct bbio bio;
+ struct bio *orig_bio;
+ struct bio *cache_miss;
+
+ unsigned insert_bio_sectors;
+
+ unsigned recoverable:1;
+ unsigned unaligned_bvec:1;
+ unsigned write:1;
+
+ unsigned long start_time;
+
+ struct btree_op op;
+ struct data_insert_op iop;
+};
+
static void bch_cache_read_endio(struct bio *bio, int error)
{
struct bbio *b = container_of(bio, struct bbio, bio);
*/
if (error)
- s->error = error;
- else if (ptr_stale(s->c, &b->key, 0)) {
- atomic_long_inc(&s->c->cache_read_races);
- s->error = -EINTR;
+ s->iop.error = error;
+ else if (ptr_stale(s->iop.c, &b->key, 0)) {
+ atomic_long_inc(&s->iop.c->cache_read_races);
+ s->iop.error = -EINTR;
}
- bch_bbio_endio(s->c, bio, error, "reading from cache");
+ bch_bbio_endio(s->iop.c, bio, error, "reading from cache");
}
/*
struct bkey *bio_key;
unsigned ptr;
- if (bkey_cmp(k, &KEY(s->inode, bio->bi_sector, 0)) <= 0)
+ if (bkey_cmp(k, &KEY(s->iop.inode, bio->bi_sector, 0)) <= 0)
return MAP_CONTINUE;
- if (KEY_INODE(k) != s->inode ||
+ if (KEY_INODE(k) != s->iop.inode ||
KEY_START(k) > bio->bi_sector) {
unsigned bio_sectors = bio_sectors(bio);
- unsigned sectors = KEY_INODE(k) == s->inode
+ unsigned sectors = KEY_INODE(k) == s->iop.inode
? min_t(uint64_t, INT_MAX,
KEY_START(k) - bio->bi_sector)
: INT_MAX;
bio_key = &container_of(n, struct bbio, bio)->key;
bch_bkey_copy_single_ptr(bio_key, k, ptr);
- bch_cut_front(&KEY(s->inode, n->bi_sector, 0), bio_key);
- bch_cut_back(&KEY(s->inode, bio_end_sector(n), 0), bio_key);
+ bch_cut_front(&KEY(s->iop.inode, n->bi_sector, 0), bio_key);
+ bch_cut_back(&KEY(s->iop.inode, bio_end_sector(n), 0), bio_key);
n->bi_end_io = bch_cache_read_endio;
n->bi_private = &s->cl;
static void cache_lookup(struct closure *cl)
{
- struct search *s = container_of(cl, struct search, btree);
+ struct search *s = container_of(cl, struct search, iop.cl);
struct bio *bio = &s->bio.bio;
- int ret = bch_btree_map_keys(&s->op, s->c,
- &KEY(s->inode, bio->bi_sector, 0),
+ int ret = bch_btree_map_keys(&s->op, s->iop.c,
+ &KEY(s->iop.inode, bio->bi_sector, 0),
cache_lookup_fn, MAP_END_KEY);
if (ret == -EAGAIN)
continue_at(cl, cache_lookup, bcache_wq);
if (error) {
struct search *s = container_of(cl, struct search, cl);
- s->error = error;
+ s->iop.error = error;
/* Only cache read errors are recoverable */
s->recoverable = false;
}
part_stat_add(cpu, &s->d->disk->part0, ticks[rw], duration);
part_stat_unlock();
- trace_bcache_request_end(s, s->orig_bio);
- bio_endio(s->orig_bio, s->error);
+ trace_bcache_request_end(s->d, s->orig_bio);
+ bio_endio(s->orig_bio, s->iop.error);
s->orig_bio = NULL;
}
}
struct search *s = container_of(cl, struct search, cl);
bio_complete(s);
- if (s->cache_bio)
- bio_put(s->cache_bio);
+ if (s->iop.bio)
+ bio_put(s->iop.bio);
if (s->unaligned_bvec)
mempool_free(s->bio.bio.bi_io_vec, s->d->unaligned_bvec);
struct bio_vec *bv;
s = mempool_alloc(d->c->search, GFP_NOIO);
- memset(s, 0, offsetof(struct search, insert_keys));
+ memset(s, 0, offsetof(struct search, iop.insert_keys));
__closure_init(&s->cl, NULL);
- s->inode = d->id;
- s->c = d->c;
+ s->iop.inode = d->id;
+ s->iop.c = d->c;
s->d = d;
s->op.lock = -1;
- s->task = current;
+ s->iop.task = current;
s->orig_bio = bio;
s->write = (bio->bi_rw & REQ_WRITE) != 0;
- s->flush_journal = (bio->bi_rw & (REQ_FLUSH|REQ_FUA)) != 0;
+ s->iop.flush_journal = (bio->bi_rw & (REQ_FLUSH|REQ_FUA)) != 0;
s->recoverable = 1;
s->start_time = jiffies;
do_bio_hook(s);
cached_dev_put(dc);
}
-unsigned bch_get_congested(struct cache_set *c)
-{
- int i;
- long rand;
-
- if (!c->congested_read_threshold_us &&
- !c->congested_write_threshold_us)
- return 0;
-
- i = (local_clock_us() - c->congested_last_us) / 1024;
- if (i < 0)
- return 0;
-
- i += atomic_read(&c->congested);
- if (i >= 0)
- return 0;
-
- i += CONGESTED_MAX;
-
- if (i > 0)
- i = fract_exp_two(i, 6);
-
- rand = get_random_int();
- i -= bitmap_weight(&rand, BITS_PER_LONG);
-
- return i > 0 ? i : 1;
-}
-
-static void add_sequential(struct task_struct *t)
-{
- ewma_add(t->sequential_io_avg,
- t->sequential_io, 8, 0);
-
- t->sequential_io = 0;
-}
-
-static struct hlist_head *iohash(struct cached_dev *dc, uint64_t k)
-{
- return &dc->io_hash[hash_64(k, RECENT_IO_BITS)];
-}
-
-static bool check_should_bypass(struct cached_dev *dc, struct search *s)
-{
- struct cache_set *c = s->c;
- struct bio *bio = &s->bio.bio;
- unsigned mode = cache_mode(dc, bio);
- unsigned sectors, congested = bch_get_congested(c);
-
- if (atomic_read(&dc->disk.detaching) ||
- c->gc_stats.in_use > CUTOFF_CACHE_ADD ||
- (bio->bi_rw & REQ_DISCARD))
- goto skip;
-
- if (mode == CACHE_MODE_NONE ||
- (mode == CACHE_MODE_WRITEAROUND &&
- (bio->bi_rw & REQ_WRITE)))
- goto skip;
-
- if (bio->bi_sector & (c->sb.block_size - 1) ||
- bio_sectors(bio) & (c->sb.block_size - 1)) {
- pr_debug("skipping unaligned io");
- goto skip;
- }
-
- if (!congested && !dc->sequential_cutoff)
- goto rescale;
-
- if (!congested &&
- mode == CACHE_MODE_WRITEBACK &&
- (bio->bi_rw & REQ_WRITE) &&
- (bio->bi_rw & REQ_SYNC))
- goto rescale;
-
- if (dc->sequential_merge) {
- struct io *i;
-
- spin_lock(&dc->io_lock);
-
- hlist_for_each_entry(i, iohash(dc, bio->bi_sector), hash)
- if (i->last == bio->bi_sector &&
- time_before(jiffies, i->jiffies))
- goto found;
-
- i = list_first_entry(&dc->io_lru, struct io, lru);
-
- add_sequential(s->task);
- i->sequential = 0;
-found:
- if (i->sequential + bio->bi_size > i->sequential)
- i->sequential += bio->bi_size;
-
- i->last = bio_end_sector(bio);
- i->jiffies = jiffies + msecs_to_jiffies(5000);
- s->task->sequential_io = i->sequential;
-
- hlist_del(&i->hash);
- hlist_add_head(&i->hash, iohash(dc, i->last));
- list_move_tail(&i->lru, &dc->io_lru);
-
- spin_unlock(&dc->io_lock);
- } else {
- s->task->sequential_io = bio->bi_size;
-
- add_sequential(s->task);
- }
-
- sectors = max(s->task->sequential_io,
- s->task->sequential_io_avg) >> 9;
-
- if (dc->sequential_cutoff &&
- sectors >= dc->sequential_cutoff >> 9) {
- trace_bcache_bypass_sequential(s->orig_bio);
- goto skip;
- }
-
- if (congested && sectors >= congested) {
- trace_bcache_bypass_congested(s->orig_bio);
- goto skip;
- }
-
-rescale:
- bch_rescale_priorities(c, bio_sectors(bio));
- return false;
-skip:
- bch_mark_sectors_bypassed(s, bio_sectors(bio));
- return true;
-}
-
/* Process reads */
static void cached_dev_cache_miss_done(struct closure *cl)
{
struct search *s = container_of(cl, struct search, cl);
- if (s->insert_collision)
- bch_mark_cache_miss_collision(s);
+ if (s->iop.replace_collision)
+ bch_mark_cache_miss_collision(s->iop.c, s->d);
- if (s->cache_bio) {
+ if (s->iop.bio) {
int i;
struct bio_vec *bv;
- bio_for_each_segment_all(bv, s->cache_bio, i)
+ bio_for_each_segment_all(bv, s->iop.bio, i)
__free_page(bv->bv_page);
}
/* Retry from the backing device: */
trace_bcache_read_retry(s->orig_bio);
- s->error = 0;
+ s->iop.error = 0;
bv = s->bio.bio.bi_io_vec;
do_bio_hook(s);
s->bio.bio.bi_io_vec = bv;
* to the buffers the original bio pointed to:
*/
- if (s->cache_bio) {
- bio_reset(s->cache_bio);
- s->cache_bio->bi_sector =
- s->cache_miss->bi_sector;
- s->cache_bio->bi_bdev = s->cache_miss->bi_bdev;
- s->cache_bio->bi_size = s->cache_bio_sectors << 9;
- bch_bio_map(s->cache_bio, NULL);
+ if (s->iop.bio) {
+ bio_reset(s->iop.bio);
+ s->iop.bio->bi_sector = s->cache_miss->bi_sector;
+ s->iop.bio->bi_bdev = s->cache_miss->bi_bdev;
+ s->iop.bio->bi_size = s->insert_bio_sectors << 9;
+ bch_bio_map(s->iop.bio, NULL);
- bio_copy_data(s->cache_miss, s->cache_bio);
+ bio_copy_data(s->cache_miss, s->iop.bio);
bio_put(s->cache_miss);
s->cache_miss = NULL;
}
- if (verify(dc, &s->bio.bio) && s->recoverable)
- bch_data_verify(s);
+ if (verify(dc, &s->bio.bio) && s->recoverable && !s->unaligned_bvec)
+ bch_data_verify(dc, s->orig_bio);
bio_complete(s);
- if (s->cache_bio &&
- !test_bit(CACHE_SET_STOPPING, &s->c->flags)) {
- BUG_ON(!s->replace);
- closure_call(&s->btree, bch_data_insert, NULL, cl);
+ if (s->iop.bio &&
+ !test_bit(CACHE_SET_STOPPING, &s->iop.c->flags)) {
+ BUG_ON(!s->iop.replace);
+ closure_call(&s->iop.cl, bch_data_insert, NULL, cl);
}
continue_at(cl, cached_dev_cache_miss_done, NULL);
struct search *s = container_of(cl, struct search, cl);
struct cached_dev *dc = container_of(s->d, struct cached_dev, disk);
- bch_mark_cache_accounting(s, !s->cache_miss, s->bypass);
- trace_bcache_read(s->orig_bio, !s->cache_miss, s->bypass);
+ bch_mark_cache_accounting(s->iop.c, s->d,
+ !s->cache_miss, s->iop.bypass);
+ trace_bcache_read(s->orig_bio, !s->cache_miss, s->iop.bypass);
- if (s->error)
+ if (s->iop.error)
continue_at_nobarrier(cl, cached_dev_read_error, bcache_wq);
- else if (s->cache_bio || verify(dc, &s->bio.bio))
+ else if (s->iop.bio || verify(dc, &s->bio.bio))
continue_at_nobarrier(cl, cached_dev_read_done, bcache_wq);
else
continue_at_nobarrier(cl, cached_dev_bio_complete, NULL);
struct cached_dev *dc = container_of(s->d, struct cached_dev, disk);
struct bio *miss, *cache_bio;
- if (s->cache_miss || s->bypass) {
+ if (s->cache_miss || s->iop.bypass) {
miss = bch_bio_split(bio, sectors, GFP_NOIO, s->d->bio_split);
ret = miss == bio ? MAP_DONE : MAP_CONTINUE;
goto out_submit;
if (!(bio->bi_rw & REQ_RAHEAD) &&
!(bio->bi_rw & REQ_META) &&
- s->c->gc_stats.in_use < CUTOFF_CACHE_READA)
+ s->iop.c->gc_stats.in_use < CUTOFF_CACHE_READA)
reada = min_t(sector_t, dc->readahead >> 9,
bdev_sectors(bio->bi_bdev) - bio_end_sector(bio));
- s->cache_bio_sectors = min(sectors, bio_sectors(bio) + reada);
+ s->insert_bio_sectors = min(sectors, bio_sectors(bio) + reada);
- s->replace_key = KEY(s->inode, bio->bi_sector +
- s->cache_bio_sectors, s->cache_bio_sectors);
+ s->iop.replace_key = KEY(s->iop.inode,
+ bio->bi_sector + s->insert_bio_sectors,
+ s->insert_bio_sectors);
- ret = bch_btree_insert_check_key(b, &s->op, &s->replace_key);
+ ret = bch_btree_insert_check_key(b, &s->op, &s->iop.replace_key);
if (ret)
return ret;
- s->replace = true;
+ s->iop.replace = true;
miss = bch_bio_split(bio, sectors, GFP_NOIO, s->d->bio_split);
ret = miss == bio ? MAP_DONE : -EINTR;
cache_bio = bio_alloc_bioset(GFP_NOWAIT,
- DIV_ROUND_UP(s->cache_bio_sectors, PAGE_SECTORS),
+ DIV_ROUND_UP(s->insert_bio_sectors, PAGE_SECTORS),
dc->disk.bio_split);
if (!cache_bio)
goto out_submit;
cache_bio->bi_sector = miss->bi_sector;
cache_bio->bi_bdev = miss->bi_bdev;
- cache_bio->bi_size = s->cache_bio_sectors << 9;
+ cache_bio->bi_size = s->insert_bio_sectors << 9;
cache_bio->bi_end_io = request_endio;
cache_bio->bi_private = &s->cl;
if (bio_alloc_pages(cache_bio, __GFP_NOWARN|GFP_NOIO))
goto out_put;
+ if (reada)
+ bch_mark_cache_readahead(s->iop.c, s->d);
+
s->cache_miss = miss;
- s->cache_bio = cache_bio;
+ s->iop.bio = cache_bio;
bio_get(cache_bio);
closure_bio_submit(cache_bio, &s->cl, s->d);
{
struct closure *cl = &s->cl;
- closure_call(&s->btree, cache_lookup, NULL, cl);
+ closure_call(&s->iop.cl, cache_lookup, NULL, cl);
continue_at(cl, cached_dev_read_done_bh, NULL);
}
struct bkey start = KEY(dc->disk.id, bio->bi_sector, 0);
struct bkey end = KEY(dc->disk.id, bio_end_sector(bio), 0);
- bch_keybuf_check_overlapping(&s->c->moving_gc_keys, &start, &end);
+ bch_keybuf_check_overlapping(&s->iop.c->moving_gc_keys, &start, &end);
down_read_non_owner(&dc->writeback_lock);
if (bch_keybuf_check_overlapping(&dc->writeback_keys, &start, &end)) {
* We overlap with some dirty data undergoing background
* writeback, force this write to writeback
*/
- s->bypass = false;
- s->writeback = true;
+ s->iop.bypass = false;
+ s->iop.writeback = true;
}
/*
* so we still want to call it.
*/
if (bio->bi_rw & REQ_DISCARD)
- s->bypass = true;
+ s->iop.bypass = true;
if (should_writeback(dc, s->orig_bio,
cache_mode(dc, bio),
- s->bypass)) {
- s->bypass = false;
- s->writeback = true;
+ s->iop.bypass)) {
+ s->iop.bypass = false;
+ s->iop.writeback = true;
}
- trace_bcache_write(s->orig_bio, s->writeback, s->bypass);
-
- if (s->bypass) {
- s->cache_bio = s->orig_bio;
- bio_get(s->cache_bio);
+ if (s->iop.bypass) {
+ s->iop.bio = s->orig_bio;
+ bio_get(s->iop.bio);
if (!(bio->bi_rw & REQ_DISCARD) ||
blk_queue_discard(bdev_get_queue(dc->bdev)))
closure_bio_submit(bio, cl, s->d);
- } else if (s->writeback) {
+ } else if (s->iop.writeback) {
bch_writeback_add(dc);
- s->cache_bio = bio;
+ s->iop.bio = bio;
if (bio->bi_rw & REQ_FLUSH) {
/* Also need to send a flush to the backing device */
closure_bio_submit(flush, cl, s->d);
}
} else {
- s->cache_bio = bio_clone_bioset(bio, GFP_NOIO,
- dc->disk.bio_split);
+ s->iop.bio = bio_clone_bioset(bio, GFP_NOIO,
+ dc->disk.bio_split);
closure_bio_submit(bio, cl, s->d);
}
- closure_call(&s->btree, bch_data_insert, NULL, cl);
+ closure_call(&s->iop.cl, bch_data_insert, NULL, cl);
continue_at(cl, cached_dev_write_complete, NULL);
}
struct search *s = container_of(cl, struct search, cl);
struct bio *bio = &s->bio.bio;
- if (s->flush_journal)
- bch_journal_meta(s->c, cl);
+ if (s->iop.flush_journal)
+ bch_journal_meta(s->iop.c, cl);
/* If it's a flush, we send the flush to the backing device too */
closure_bio_submit(bio, cl, s->d);
if (cached_dev_get(dc)) {
s = search_alloc(bio, d);
- trace_bcache_request_start(s, bio);
+ trace_bcache_request_start(s->d, bio);
if (!bio->bi_size) {
/*
cached_dev_nodata,
bcache_wq);
} else {
- s->bypass = check_should_bypass(dc, s);
+ s->iop.bypass = check_should_bypass(dc, bio);
if (rw)
cached_dev_write(dc, s);
{
struct search *s = container_of(cl, struct search, cl);
- if (s->flush_journal)
- bch_journal_meta(s->c, cl);
+ if (s->iop.flush_journal)
+ bch_journal_meta(s->iop.c, cl);
continue_at(cl, search_free, NULL);
}
cl = &s->cl;
bio = &s->bio.bio;
- trace_bcache_request_start(s, bio);
+ trace_bcache_request_start(s->d, bio);
if (!bio->bi_size) {
/*
flash_dev_nodata,
bcache_wq);
} else if (rw) {
- bch_keybuf_check_overlapping(&s->c->moving_gc_keys,
+ bch_keybuf_check_overlapping(&s->iop.c->moving_gc_keys,
&KEY(d->id, bio->bi_sector, 0),
&KEY(d->id, bio_end_sector(bio), 0));
- s->bypass = (bio->bi_rw & REQ_DISCARD) != 0;
- s->writeback = true;
- s->cache_bio = bio;
+ s->iop.bypass = (bio->bi_rw & REQ_DISCARD) != 0;
+ s->iop.writeback = true;
+ s->iop.bio = bio;
- closure_call(&s->btree, bch_data_insert, NULL, cl);
+ closure_call(&s->iop.cl, bch_data_insert, NULL, cl);
} else {
- closure_call(&s->btree, cache_lookup, NULL, cl);
+ closure_call(&s->iop.cl, cache_lookup, NULL, cl);
}
continue_at(cl, search_free, NULL);
projects / profile / ivi / kernel-x86-ivi.git / commitdiff