Skip to content

L
linux
Commit 220bb38c authored by Kent Overstreet's avatar Kent Overstreet
Browse files
Options

bcache: Break up struct search 

With all the recent refactoring around struct btree op struct search has
gotten rather large.

But we can now easily break it up in a different way - we break out
struct btree_insert_op which is for inserting data into the cache, and
that's now what the copying gc code uses - struct search is now specific
to request.c
Signed-off-by: default avatarKent Overstreet <kmo@daterainc.com>
parent cc7b8819
Hide whitespace changes
Inline Side-by-side
Showing with 378 additions and 395 deletions
drivers/md/bcache/debug.c
View file @ 220bb38c
...@@ -8,7 +8,6 @@ ...@@ -8,7 +8,6 @@
#include "bcache.h" #include "bcache.h"
#include "btree.h" #include "btree.h"
#include "debug.h" #include "debug.h"
#include "request.h"
#include <linux/console.h> #include <linux/console.h>
#include <linux/debugfs.h> #include <linux/debugfs.h>
...@@ -176,42 +175,25 @@ void bch_btree_verify(struct btree *b, struct bset *new) ...@@ -176,42 +175,25 @@ void bch_btree_verify(struct btree *b, struct bset *new)
mutex_unlock(&b->c->verify_lock); mutex_unlock(&b->c->verify_lock);
} }
static void data_verify_endio(struct bio *bio, int error) void bch_data_verify(struct cached_dev *dc, struct bio *bio)
{
struct closure *cl = bio->bi_private;
closure_put(cl);
}
void bch_data_verify(struct search *s)
{ {
char name[BDEVNAME_SIZE]; char name[BDEVNAME_SIZE];
struct cached_dev *dc = container_of(s->d, struct cached_dev, disk);
struct closure *cl = &s->cl;
struct bio *check; struct bio *check;
struct bio_vec *bv; struct bio_vec *bv;
int i; int i;
if (!s->unaligned_bvec) check = bio_clone(bio, GFP_NOIO);
bio_for_each_segment(bv, s->orig_bio, i)
bv->bv_offset = 0, bv->bv_len = PAGE_SIZE;
check = bio_clone(s->orig_bio, GFP_NOIO);
if (!check) if (!check)
return; return;
if (bio_alloc_pages(check, GFP_NOIO)) if (bio_alloc_pages(check, GFP_NOIO))
goto out_put; goto out_put;
check->bi_rw = READ_SYNC; submit_bio_wait(READ_SYNC, check);
check->bi_private = cl;
check->bi_end_io = data_verify_endio;
closure_bio_submit(check, cl, &dc->disk);
closure_sync(cl);
bio_for_each_segment(bv, s->orig_bio, i) { bio_for_each_segment(bv, bio, i) {
void *p1 = kmap(bv->bv_page); void *p1 = kmap_atomic(bv->bv_page);
void *p2 = kmap(check->bi_io_vec[i].bv_page); void *p2 = page_address(check->bi_io_vec[i].bv_page);
if (memcmp(p1 + bv->bv_offset, if (memcmp(p1 + bv->bv_offset,
p2 + bv->bv_offset, p2 + bv->bv_offset,
...@@ -219,13 +201,11 @@ void bch_data_verify(struct search *s) ...@@ -219,13 +201,11 @@ void bch_data_verify(struct search *s)
printk(KERN_ERR printk(KERN_ERR
"bcache (%s): verify failed at sector %llu\n", "bcache (%s): verify failed at sector %llu\n",
bdevname(dc->bdev, name), bdevname(dc->bdev, name),
(uint64_t) s->orig_bio->bi_sector); (uint64_t) bio->bi_sector);
kunmap_atomic(p1);
kunmap(bv->bv_page);
kunmap(check->bi_io_vec[i].bv_page);
} }
__bio_for_each_segment(bv, check, i, 0) bio_for_each_segment_all(bv, check, i)
__free_page(bv->bv_page); __free_page(bv->bv_page);
out_put: out_put:
bio_put(check); bio_put(check);
......
drivers/md/bcache/debug.h
View file @ 220bb38c
...@@ -29,12 +29,12 @@ void bch_check_keys(struct btree *, const char *, ...); ...@@ -29,12 +29,12 @@ void bch_check_keys(struct btree *, const char *, ...);
#ifdef CONFIG_BCACHE_DEBUG #ifdef CONFIG_BCACHE_DEBUG
void bch_btree_verify(struct btree *, struct bset *); void bch_btree_verify(struct btree *, struct bset *);
void bch_data_verify(struct search *); void bch_data_verify(struct cached_dev *, struct bio *);
#else /* DEBUG */ #else /* DEBUG */
static inline void bch_btree_verify(struct btree *b, struct bset *i) {} static inline void bch_btree_verify(struct btree *b, struct bset *i) {}
static inline void bch_data_verify(struct search *s) {}; static inline void bch_data_verify(struct cached_dev *dc, struct bio *bio) {};
#endif #endif
......
drivers/md/bcache/movinggc.c
View file @ 220bb38c
...@@ -12,8 +12,9 @@ ...@@ -12,8 +12,9 @@
#include <trace/events/bcache.h> #include <trace/events/bcache.h>
struct moving_io { struct moving_io {
struct closure cl;
struct keybuf_key *w; struct keybuf_key *w;
struct search s; struct data_insert_op op;
struct bbio bio; struct bbio bio;
}; };
...@@ -38,13 +39,13 @@ static bool moving_pred(struct keybuf *buf, struct bkey *k) ...@@ -38,13 +39,13 @@ static bool moving_pred(struct keybuf *buf, struct bkey *k)
static void moving_io_destructor(struct closure *cl) static void moving_io_destructor(struct closure *cl)
{ {
struct moving_io *io = container_of(cl, struct moving_io, s.cl); struct moving_io *io = container_of(cl, struct moving_io, cl);
kfree(io); kfree(io);
} }
static void write_moving_finish(struct closure *cl) static void write_moving_finish(struct closure *cl)
{ {
struct moving_io *io = container_of(cl, struct moving_io, s.cl); struct moving_io *io = container_of(cl, struct moving_io, cl);
struct bio *bio = &io->bio.bio; struct bio *bio = &io->bio.bio;
struct bio_vec *bv; struct bio_vec *bv;
int i; int i;
...@@ -52,12 +53,12 @@ static void write_moving_finish(struct closure *cl) ...@@ -52,12 +53,12 @@ static void write_moving_finish(struct closure *cl)
bio_for_each_segment_all(bv, bio, i) bio_for_each_segment_all(bv, bio, i)
__free_page(bv->bv_page); __free_page(bv->bv_page);
if (io->s.insert_collision) if (io->op.replace_collision)
trace_bcache_gc_copy_collision(&io->w->key); trace_bcache_gc_copy_collision(&io->w->key);
bch_keybuf_del(&io->s.c->moving_gc_keys, io->w); bch_keybuf_del(&io->op.c->moving_gc_keys, io->w);
up(&io->s.c->moving_in_flight); up(&io->op.c->moving_in_flight);
closure_return_with_destructor(cl, moving_io_destructor); closure_return_with_destructor(cl, moving_io_destructor);
} }
...@@ -65,12 +66,12 @@ static void write_moving_finish(struct closure *cl) ...@@ -65,12 +66,12 @@ static void write_moving_finish(struct closure *cl)
static void read_moving_endio(struct bio *bio, int error) static void read_moving_endio(struct bio *bio, int error)
{ {
struct moving_io *io = container_of(bio->bi_private, struct moving_io *io = container_of(bio->bi_private,
struct moving_io, s.cl); struct moving_io, cl);
if (error) if (error)
io->s.error = error; io->op.error = error;
bch_bbio_endio(io->s.c, bio, error, "reading data to move"); bch_bbio_endio(io->op.c, bio, error, "reading data to move");
} }
static void moving_init(struct moving_io *io) static void moving_init(struct moving_io *io)
...@@ -84,32 +85,30 @@ static void moving_init(struct moving_io *io) ...@@ -84,32 +85,30 @@ static void moving_init(struct moving_io *io)
bio->bi_size = KEY_SIZE(&io->w->key) << 9; bio->bi_size = KEY_SIZE(&io->w->key) << 9;
bio->bi_max_vecs = DIV_ROUND_UP(KEY_SIZE(&io->w->key), bio->bi_max_vecs = DIV_ROUND_UP(KEY_SIZE(&io->w->key),
PAGE_SECTORS); PAGE_SECTORS);
bio->bi_private = &io->s.cl; bio->bi_private = &io->cl;
bio->bi_io_vec = bio->bi_inline_vecs; bio->bi_io_vec = bio->bi_inline_vecs;
bch_bio_map(bio, NULL); bch_bio_map(bio, NULL);
} }
static void write_moving(struct closure *cl) static void write_moving(struct closure *cl)
{ {
struct search *s = container_of(cl, struct search, cl); struct moving_io *io = container_of(cl, struct moving_io, cl);
struct moving_io *io = container_of(s, struct moving_io, s); struct data_insert_op *op = &io->op;
if (!s->error) { if (!op->error) {
moving_init(io); moving_init(io);
io->bio.bio.bi_sector = KEY_START(&io->w->key); io->bio.bio.bi_sector = KEY_START(&io->w->key);
s->op.lock = -1; op->write_prio = 1;
s->write_prio = 1; op->bio = &io->bio.bio;
s->cache_bio = &io->bio.bio;
s->writeback = KEY_DIRTY(&io->w->key); op->writeback = KEY_DIRTY(&io->w->key);
s->csum = KEY_CSUM(&io->w->key); op->csum = KEY_CSUM(&io->w->key);
bkey_copy(&s->replace_key, &io->w->key); bkey_copy(&op->replace_key, &io->w->key);
s->replace = true; op->replace = true;
closure_init(&s->btree, cl); closure_call(&op->cl, bch_data_insert, NULL, cl);
bch_data_insert(&s->btree);
} }
continue_at(cl, write_moving_finish, system_wq); continue_at(cl, write_moving_finish, system_wq);
...@@ -117,11 +116,10 @@ static void write_moving(struct closure *cl) ...@@ -117,11 +116,10 @@ static void write_moving(struct closure *cl)
static void read_moving_submit(struct closure *cl) static void read_moving_submit(struct closure *cl)
{ {
struct search *s = container_of(cl, struct search, cl); struct moving_io *io = container_of(cl, struct moving_io, cl);
struct moving_io *io = container_of(s, struct moving_io, s);
struct bio *bio = &io->bio.bio; struct bio *bio = &io->bio.bio;
bch_submit_bbio(bio, s->c, &io->w->key, 0); bch_submit_bbio(bio, io->op.c, &io->w->key, 0);
continue_at(cl, write_moving, system_wq); continue_at(cl, write_moving, system_wq);
} }
...@@ -151,8 +149,8 @@ static void read_moving(struct cache_set *c) ...@@ -151,8 +149,8 @@ static void read_moving(struct cache_set *c)
w->private = io; w->private = io;
io->w = w; io->w = w;
io->s.inode = KEY_INODE(&w->key); io->op.inode = KEY_INODE(&w->key);
io->s.c = c; io->op.c = c;
moving_init(io); moving_init(io);
bio = &io->bio.bio; bio = &io->bio.bio;
...@@ -166,7 +164,7 @@ static void read_moving(struct cache_set *c) ...@@ -166,7 +164,7 @@ static void read_moving(struct cache_set *c)
trace_bcache_gc_copy(&w->key); trace_bcache_gc_copy(&w->key);
down(&c->moving_in_flight); down(&c->moving_in_flight);
closure_call(&io->s.cl, read_moving_submit, NULL, &cl); closure_call(&io->cl, read_moving_submit, NULL, &cl);
} }
if (0) { if (0) {
......
drivers/md/bcache/request.c
View file @ 220bb38c
...@@ -215,9 +215,9 @@ static void bio_csum(struct bio *bio, struct bkey *k) ...@@ -215,9 +215,9 @@ static void bio_csum(struct bio *bio, struct bkey *k)
static void bch_data_insert_keys(struct closure *cl) 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; 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; int ret;
/* /*
...@@ -232,27 +232,26 @@ static void bch_data_insert_keys(struct closure *cl) ...@@ -232,27 +232,26 @@ static void bch_data_insert_keys(struct closure *cl)
closure_sync(&s->cl); closure_sync(&s->cl);
#endif #endif
if (s->write) if (!op->replace)
journal_ref = bch_journal(s->c, &s->insert_keys, journal_ref = bch_journal(op->c, &op->insert_keys,
s->flush_journal op->flush_journal ? cl : NULL);
? &s->cl : NULL);
ret = bch_btree_insert(s->c, &s->insert_keys, ret = bch_btree_insert(op->c, &op->insert_keys,
journal_ref, replace_key); journal_ref, replace_key);
if (ret == -ESRCH) { if (ret == -ESRCH) {
s->insert_collision = true; op->replace_collision = true;
} else if (ret) { } else if (ret) {
s->error = -ENOMEM; op->error = -ENOMEM;
s->insert_data_done = true; op->insert_data_done = true;
} }
if (journal_ref) if (journal_ref)
atomic_dec_bug(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); continue_at(cl, bch_data_insert_start, bcache_wq);
bch_keylist_free(&s->insert_keys); bch_keylist_free(&op->insert_keys);
closure_return(cl); closure_return(cl);
} }
...@@ -349,10 +348,10 @@ static struct open_bucket *pick_data_bucket(struct cache_set *c, ...@@ -349,10 +348,10 @@ static struct open_bucket *pick_data_bucket(struct cache_set *c,
* *
* If s->writeback is true, will not fail. * If s->writeback is true, will not fail.
*/ */
static bool bch_alloc_sectors(struct bkey *k, unsigned sectors, static bool bch_alloc_sectors(struct data_insert_op *op,
struct search *s) struct bkey *k, unsigned sectors)
{ {
struct cache_set *c = s->c; struct cache_set *c = op->c;
struct open_bucket *b; struct open_bucket *b;
BKEY_PADDED(key) alloc; BKEY_PADDED(key) alloc;
unsigned i; unsigned i;
...@@ -367,15 +366,15 @@ static bool bch_alloc_sectors(struct bkey *k, unsigned sectors, ...@@ -367,15 +366,15 @@ static bool bch_alloc_sectors(struct bkey *k, unsigned sectors,
bkey_init(&alloc.key); bkey_init(&alloc.key);
spin_lock(&c->data_bucket_lock); spin_lock(&c->data_bucket_lock);
while (!(b = pick_data_bucket(c, k, s->task, &alloc.key))) { while (!(b = pick_data_bucket(c, k, op->task, &alloc.key))) {
unsigned watermark = s->write_prio unsigned watermark = op->write_prio
? WATERMARK_MOVINGGC ? WATERMARK_MOVINGGC
: WATERMARK_NONE; : WATERMARK_NONE;
spin_unlock(&c->data_bucket_lock); spin_unlock(&c->data_bucket_lock);
if (bch_bucket_alloc_set(c, watermark, &alloc.key, if (bch_bucket_alloc_set(c, watermark, &alloc.key,
1, s->writeback)) 1, op->writeback))
return false; return false;
spin_lock(&c->data_bucket_lock); spin_lock(&c->data_bucket_lock);
...@@ -409,7 +408,7 @@ static bool bch_alloc_sectors(struct bkey *k, unsigned sectors, ...@@ -409,7 +408,7 @@ static bool bch_alloc_sectors(struct bkey *k, unsigned sectors,
*/ */
list_move_tail(&b->list, &c->data_buckets); list_move_tail(&b->list, &c->data_buckets);
bkey_copy_key(&b->key, k); bkey_copy_key(&b->key, k);
b->last = s->task; b->last = op->task;
b->sectors_free -= sectors; b->sectors_free -= sectors;
...@@ -438,8 +437,8 @@ static bool bch_alloc_sectors(struct bkey *k, unsigned sectors, ...@@ -438,8 +437,8 @@ static bool bch_alloc_sectors(struct bkey *k, unsigned sectors,
static void bch_data_invalidate(struct closure *cl) static void bch_data_invalidate(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);
struct bio *bio = s->cache_bio; struct bio *bio = op->bio;
pr_debug("invalidating %i sectors from %llu", pr_debug("invalidating %i sectors from %llu",
bio_sectors(bio), (uint64_t) bio->bi_sector); bio_sectors(bio), (uint64_t) bio->bi_sector);
...@@ -447,17 +446,17 @@ static void bch_data_invalidate(struct closure *cl) ...@@ -447,17 +446,17 @@ static void bch_data_invalidate(struct closure *cl)
while (bio_sectors(bio)) { while (bio_sectors(bio)) {
unsigned len = min(bio_sectors(bio), 1U << 14); 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; goto out;
bio->bi_sector += len; bio->bi_sector += len;
bio->bi_size -= len << 9; bio->bi_size -= len << 9;
bch_keylist_add(&s->insert_keys, bch_keylist_add(&op->insert_keys,
&KEY(s->inode, bio->bi_sector, len)); &KEY(op->inode, bio->bi_sector, len));
} }
s->insert_data_done = true; op->insert_data_done = true;
bio_put(bio); bio_put(bio);
out: out:
continue_at(cl, bch_data_insert_keys, bcache_wq); continue_at(cl, bch_data_insert_keys, bcache_wq);
...@@ -465,7 +464,7 @@ static void bch_data_invalidate(struct closure *cl) ...@@ -465,7 +464,7 @@ static void bch_data_invalidate(struct closure *cl)
static void bch_data_insert_error(struct closure *cl) 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 * Our data write just errored, which means we've got a bunch of keys to
...@@ -476,9 +475,9 @@ static void bch_data_insert_error(struct closure *cl) ...@@ -476,9 +475,9 @@ static void bch_data_insert_error(struct closure *cl)
* from the keys we'll accomplish just that. * 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); struct bkey *n = bkey_next(src);
SET_KEY_PTRS(src, 0); SET_KEY_PTRS(src, 0);
...@@ -488,7 +487,7 @@ static void bch_data_insert_error(struct closure *cl) ...@@ -488,7 +487,7 @@ static void bch_data_insert_error(struct closure *cl)
src = n; src = n;
} }
s->insert_keys.top = dst; op->insert_keys.top = dst;
bch_data_insert_keys(cl); bch_data_insert_keys(cl);
} }
...@@ -496,32 +495,32 @@ static void bch_data_insert_error(struct closure *cl) ...@@ -496,32 +495,32 @@ static void bch_data_insert_error(struct closure *cl)
static void bch_data_insert_endio(struct bio *bio, int error) static void bch_data_insert_endio(struct bio *bio, int error)
{ {
struct closure *cl = bio->bi_private; 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) { if (error) {
/* TODO: We could try to recover from this. */ /* TODO: We could try to recover from this. */
if (s->writeback) if (op->writeback)
s->error = error; op->error = error;
else if (s->write) else if (!op->replace)
set_closure_fn(cl, bch_data_insert_error, bcache_wq); set_closure_fn(cl, bch_data_insert_error, bcache_wq);
else else
set_closure_fn(cl, NULL, NULL); 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) static void bch_data_insert_start(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);
struct bio *bio = s->cache_bio, *n; struct bio *bio = op->bio, *n;
if (s->bypass) if (op->bypass)
return bch_data_invalidate(cl); return bch_data_invalidate(cl);
if (atomic_sub_return(bio_sectors(bio), &s->c->sectors_to_gc) < 0) { if (atomic_sub_return(bio_sectors(bio), &op->c->sectors_to_gc) < 0) {
set_gc_sectors(s->c); set_gc_sectors(op->c);
wake_up_gc(s->c); wake_up_gc(op->c);
} }
/* /*
...@@ -533,21 +532,20 @@ static void bch_data_insert_start(struct closure *cl) ...@@ -533,21 +532,20 @@ static void bch_data_insert_start(struct closure *cl)
do { do {
unsigned i; unsigned i;
struct bkey *k; struct bkey *k;
struct bio_set *split = s->d struct bio_set *split = op->c->bio_split;
? s->d->bio_split : s->c->bio_split;
/* 1 for the device pointer and 1 for the chksum */ /* 1 for the device pointer and 1 for the chksum */
if (bch_keylist_realloc(&s->insert_keys, if (bch_keylist_realloc(&op->insert_keys,
1 + (s->csum ? 1 : 0), 1 + (op->csum ? 1 : 0),
s->c)) op->c))
continue_at(cl, bch_data_insert_keys, bcache_wq); continue_at(cl, bch_data_insert_keys, bcache_wq);
k = s->insert_keys.top; k = op->insert_keys.top;
bkey_init(k); bkey_init(k);
SET_KEY_INODE(k, s->inode); SET_KEY_INODE(k, op->inode);
SET_KEY_OFFSET(k, bio->bi_sector); 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; goto err;
n = bch_bio_split(bio, KEY_SIZE(k), GFP_NOIO, split); n = bch_bio_split(bio, KEY_SIZE(k), GFP_NOIO, split);
...@@ -555,30 +553,30 @@ static void bch_data_insert_start(struct closure *cl) ...@@ -555,30 +553,30 @@ static void bch_data_insert_start(struct closure *cl)
n->bi_end_io = bch_data_insert_endio; n->bi_end_io = bch_data_insert_endio;
n->bi_private = cl; n->bi_private = cl;
if (s->writeback) { if (op->writeback) {
SET_KEY_DIRTY(k, true); SET_KEY_DIRTY(k, true);
for (i = 0; i < KEY_PTRS(k); i++) 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); GC_MARK_DIRTY);
} }
SET_KEY_CSUM(k, s->csum); SET_KEY_CSUM(k, op->csum);
if (KEY_CSUM(k)) if (KEY_CSUM(k))
bio_csum(n, k); bio_csum(n, k);
trace_bcache_cache_insert(k); trace_bcache_cache_insert(k);
bch_keylist_push(&s->insert_keys); bch_keylist_push(&op->insert_keys);
n->bi_rw |= REQ_WRITE; n->bi_rw |= REQ_WRITE;
bch_submit_bbio(n, s->c, k, 0); bch_submit_bbio(n, op->c, k, 0);
} while (n != bio); } while (n != bio);
s->insert_data_done = true; op->insert_data_done = true;
continue_at(cl, bch_data_insert_keys, bcache_wq); continue_at(cl, bch_data_insert_keys, bcache_wq);
err: err:
/* bch_alloc_sectors() blocks if s->writeback = true */ /* 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 * But if it's not a writeback write we'd rather just bail out if
...@@ -586,24 +584,24 @@ static void bch_data_insert_start(struct closure *cl) ...@@ -586,24 +584,24 @@ static void bch_data_insert_start(struct closure *cl)
* we might be starving btree writes for gc or something. * 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 * Writethrough write: We can't complete the write until we've
* updated the index. But we don't want to delay the write while * 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 * we wait for buckets to be freed up, so just invalidate the
* rest of the write. * rest of the write.
*/ */
s->bypass = true; op->bypass = true;
return bch_data_invalidate(cl); return bch_data_invalidate(cl);
} else { } else {
/* /*
* From a cache miss, we can just insert the keys for the data * 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. * 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); 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); continue_at(cl, bch_data_insert_keys, bcache_wq);
else else
closure_return(cl); closure_return(cl);
...@@ -631,15 +629,169 @@ static void bch_data_insert_start(struct closure *cl) ...@@ -631,15 +629,169 @@ static void bch_data_insert_start(struct closure *cl)
*/ */
void bch_data_insert(struct closure *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); trace_bcache_write(op->bio, op->writeback, op->bypass);
bio_get(s->cache_bio);
bch_keylist_init(&op->insert_keys);
bio_get(op->bio);
bch_data_insert_start(cl); 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 */ /* 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) static void bch_cache_read_endio(struct bio *bio, int error)
{ {
struct bbio *b = container_of(bio, struct bbio, bio); struct bbio *b = container_of(bio, struct bbio, bio);
...@@ -654,13 +806,13 @@ static void bch_cache_read_endio(struct bio *bio, int error) ...@@ -654,13 +806,13 @@ static void bch_cache_read_endio(struct bio *bio, int error)
*/ */
if (error) if (error)
s->error = error; s->iop.error = error;
else if (ptr_stale(s->c, &b->key, 0)) { else if (ptr_stale(s->iop.c, &b->key, 0)) {
atomic_long_inc(&s->c->cache_read_races); atomic_long_inc(&s->iop.c->cache_read_races);
s->error = -EINTR; 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");
} }
/* /*
...@@ -674,13 +826,13 @@ static int cache_lookup_fn(struct btree_op *op, struct btree *b, struct bkey *k) ...@@ -674,13 +826,13 @@ static int cache_lookup_fn(struct btree_op *op, struct btree *b, struct bkey *k)
struct bkey *bio_key; struct bkey *bio_key;
unsigned ptr; 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; return MAP_CONTINUE;
if (KEY_INODE(k) != s->inode || if (KEY_INODE(k) != s->iop.inode ||
KEY_START(k) > bio->bi_sector) { KEY_START(k) > bio->bi_sector) {
unsigned bio_sectors = bio_sectors(bio); 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, ? min_t(uint64_t, INT_MAX,
KEY_START(k) - bio->bi_sector) KEY_START(k) - bio->bi_sector)
: INT_MAX; : INT_MAX;
...@@ -708,8 +860,8 @@ static int cache_lookup_fn(struct btree_op *op, struct btree *b, struct bkey *k) ...@@ -708,8 +860,8 @@ static int cache_lookup_fn(struct btree_op *op, struct btree *b, struct bkey *k)
bio_key = &container_of(n, struct bbio, bio)->key; bio_key = &container_of(n, struct bbio, bio)->key;
bch_bkey_copy_single_ptr(bio_key, k, ptr); bch_bkey_copy_single_ptr(bio_key, k, ptr);
bch_cut_front(&KEY(s->inode, n->bi_sector, 0), bio_key); bch_cut_front(&KEY(s->iop.inode, n->bi_sector, 0), bio_key);
bch_cut_back(&KEY(s->inode, bio_end_sector(n), 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_end_io = bch_cache_read_endio;
n->bi_private = &s->cl; n->bi_private = &s->cl;
...@@ -731,11 +883,11 @@ static int cache_lookup_fn(struct btree_op *op, struct btree *b, struct bkey *k) ...@@ -731,11 +883,11 @@ static int cache_lookup_fn(struct btree_op *op, struct btree *b, struct bkey *k)
static void cache_lookup(struct closure *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; struct bio *bio = &s->bio.bio;
int ret = bch_btree_map_keys(&s->op, s->c, int ret = bch_btree_map_keys(&s->op, s->iop.c,
&KEY(s->inode, bio->bi_sector, 0), &KEY(s->iop.inode, bio->bi_sector, 0),
cache_lookup_fn, MAP_END_KEY); cache_lookup_fn, MAP_END_KEY);
if (ret == -EAGAIN) if (ret == -EAGAIN)
continue_at(cl, cache_lookup, bcache_wq); continue_at(cl, cache_lookup, bcache_wq);
...@@ -751,7 +903,7 @@ static void request_endio(struct bio *bio, int error) ...@@ -751,7 +903,7 @@ static void request_endio(struct bio *bio, int error)
if (error) { if (error) {
struct search *s = container_of(cl, struct search, cl); struct search *s = container_of(cl, struct search, cl);
s->error = error; s->iop.error = error;
/* Only cache read errors are recoverable */ /* Only cache read errors are recoverable */
s->recoverable = false; s->recoverable = false;
} }
...@@ -771,8 +923,8 @@ static void bio_complete(struct search *s) ...@@ -771,8 +923,8 @@ static void bio_complete(struct search *s)
part_stat_add(cpu, &s->d->disk->part0, ticks[rw], duration); part_stat_add(cpu, &s->d->disk->part0, ticks[rw], duration);
part_stat_unlock(); part_stat_unlock();
trace_bcache_request_end(s, s->orig_bio); trace_bcache_request_end(s->d, s->orig_bio);
bio_endio(s->orig_bio, s->error); bio_endio(s->orig_bio, s->iop.error);
s->orig_bio = NULL; s->orig_bio = NULL;
} }
} }
...@@ -792,8 +944,8 @@ static void search_free(struct closure *cl) ...@@ -792,8 +944,8 @@ static void search_free(struct closure *cl)
struct search *s = container_of(cl, struct search, cl); struct search *s = container_of(cl, struct search, cl);
bio_complete(s); bio_complete(s);
if (s->cache_bio) if (s->iop.bio)
bio_put(s->cache_bio); bio_put(s->iop.bio);
if (s->unaligned_bvec) if (s->unaligned_bvec)
mempool_free(s->bio.bio.bi_io_vec, s->d->unaligned_bvec); mempool_free(s->bio.bio.bi_io_vec, s->d->unaligned_bvec);
...@@ -808,18 +960,18 @@ static struct search *search_alloc(struct bio *bio, struct bcache_device *d) ...@@ -808,18 +960,18 @@ static struct search *search_alloc(struct bio *bio, struct bcache_device *d)
struct bio_vec *bv; struct bio_vec *bv;
s = mempool_alloc(d->c->search, GFP_NOIO); 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); __closure_init(&s->cl, NULL);
s->inode = d->id; s->iop.inode = d->id;
s->c = d->c; s->iop.c = d->c;
s->d = d; s->d = d;
s->op.lock = -1; s->op.lock = -1;
s->task = current; s->iop.task = current;
s->orig_bio = bio; s->orig_bio = bio;
s->write = (bio->bi_rw & REQ_WRITE) != 0; 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->recoverable = 1;
s->start_time = jiffies; s->start_time = jiffies;
do_bio_hook(s); do_bio_hook(s);
...@@ -847,148 +999,20 @@ static void cached_dev_bio_complete(struct closure *cl) ...@@ -847,148 +999,20 @@ static void cached_dev_bio_complete(struct closure *cl)
cached_dev_put(dc); 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 */ /* Process reads */
static void cached_dev_cache_miss_done(struct closure *cl) static void cached_dev_cache_miss_done(struct closure *cl)
{ {
struct search *s = container_of(cl, struct search, cl); struct search *s = container_of(cl, struct search, cl);
if (s->insert_collision) if (s->iop.replace_collision)
bch_mark_cache_miss_collision(s); bch_mark_cache_miss_collision(s->iop.c, s->d);
if (s->cache_bio) { if (s->iop.bio) {
int i; int i;
struct bio_vec *bv; 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); __free_page(bv->bv_page);
} }
...@@ -1006,7 +1030,7 @@ static void cached_dev_read_error(struct closure *cl) ...@@ -1006,7 +1030,7 @@ static void cached_dev_read_error(struct closure *cl)
/* Retry from the backing device: */ /* Retry from the backing device: */
trace_bcache_read_retry(s->orig_bio); trace_bcache_read_retry(s->orig_bio);
s->error = 0; s->iop.error = 0;
bv = s->bio.bio.bi_io_vec; bv = s->bio.bio.bi_io_vec;
do_bio_hook(s); do_bio_hook(s);
s->bio.bio.bi_io_vec = bv; s->bio.bio.bi_io_vec = bv;
...@@ -1041,29 +1065,28 @@ static void cached_dev_read_done(struct closure *cl) ...@@ -1041,29 +1065,28 @@ static void cached_dev_read_done(struct closure *cl)
* to the buffers the original bio pointed to: * to the buffers the original bio pointed to:
*/ */
if (s->cache_bio) { if (s->iop.bio) {
bio_reset(s->cache_bio); bio_reset(s->iop.bio);
s->cache_bio->bi_sector = s->iop.bio->bi_sector = s->cache_miss->bi_sector;
s->cache_miss->bi_sector; s->iop.bio->bi_bdev = s->cache_miss->bi_bdev;
s->cache_bio->bi_bdev = s->cache_miss->bi_bdev; s->iop.bio->bi_size = s->insert_bio_sectors << 9;
s->cache_bio->bi_size = s->cache_bio_sectors << 9; bch_bio_map(s->iop.bio, NULL);
bch_bio_map(s->cache_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); bio_put(s->cache_miss);
s->cache_miss = NULL; s->cache_miss = NULL;
} }
if (verify(dc, &s->bio.bio) && s->recoverable) if (verify(dc, &s->bio.bio) && s->recoverable && !s->unaligned_bvec)
bch_data_verify(s); bch_data_verify(dc, s->orig_bio);
bio_complete(s); bio_complete(s);
if (s->cache_bio && if (s->iop.bio &&
!test_bit(CACHE_SET_STOPPING, &s->c->flags)) { !test_bit(CACHE_SET_STOPPING, &s->iop.c->flags)) {
BUG_ON(!s->replace); BUG_ON(!s->iop.replace);
closure_call(&s->btree, bch_data_insert, NULL, cl); closure_call(&s->iop.cl, bch_data_insert, NULL, cl);
} }
continue_at(cl, cached_dev_cache_miss_done, NULL); continue_at(cl, cached_dev_cache_miss_done, NULL);
...@@ -1074,12 +1097,13 @@ static void cached_dev_read_done_bh(struct closure *cl) ...@@ -1074,12 +1097,13 @@ static void cached_dev_read_done_bh(struct closure *cl)
struct search *s = container_of(cl, struct search, cl); struct search *s = container_of(cl, struct search, cl);
struct cached_dev *dc = container_of(s->d, struct cached_dev, disk); struct cached_dev *dc = container_of(s->d, struct cached_dev, disk);
bch_mark_cache_accounting(s, !s->cache_miss, s->bypass); bch_mark_cache_accounting(s->iop.c, s->d,
trace_bcache_read(s->orig_bio, !s->cache_miss, s->bypass); !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); 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); continue_at_nobarrier(cl, cached_dev_read_done, bcache_wq);
else else
continue_at_nobarrier(cl, cached_dev_bio_complete, NULL); continue_at_nobarrier(cl, cached_dev_bio_complete, NULL);
...@@ -1093,7 +1117,7 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s, ...@@ -1093,7 +1117,7 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s,
struct cached_dev *dc = container_of(s->d, struct cached_dev, disk); struct cached_dev *dc = container_of(s->d, struct cached_dev, disk);
struct bio *miss, *cache_bio; 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); miss = bch_bio_split(bio, sectors, GFP_NOIO, s->d->bio_split);
ret = miss == bio ? MAP_DONE : MAP_CONTINUE; ret = miss == bio ? MAP_DONE : MAP_CONTINUE;
goto out_submit; goto out_submit;
...@@ -1101,20 +1125,21 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s, ...@@ -1101,20 +1125,21 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s,
if (!(bio->bi_rw & REQ_RAHEAD) && if (!(bio->bi_rw & REQ_RAHEAD) &&
!(bio->bi_rw & REQ_META) && !(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, reada = min_t(sector_t, dc->readahead >> 9,
bdev_sectors(bio->bi_bdev) - bio_end_sector(bio)); 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->iop.replace_key = KEY(s->iop.inode,
s->cache_bio_sectors, s->cache_bio_sectors); 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) if (ret)
return ret; return ret;
s->replace = true; s->iop.replace = true;
miss = bch_bio_split(bio, sectors, GFP_NOIO, s->d->bio_split); miss = bch_bio_split(bio, sectors, GFP_NOIO, s->d->bio_split);
...@@ -1122,14 +1147,14 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s, ...@@ -1122,14 +1147,14 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s,
ret = miss == bio ? MAP_DONE : -EINTR; ret = miss == bio ? MAP_DONE : -EINTR;
cache_bio = bio_alloc_bioset(GFP_NOWAIT, 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); dc->disk.bio_split);
if (!cache_bio) if (!cache_bio)
goto out_submit; goto out_submit;
cache_bio->bi_sector = miss->bi_sector; cache_bio->bi_sector = miss->bi_sector;
cache_bio->bi_bdev = miss->bi_bdev; 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_end_io = request_endio;
cache_bio->bi_private = &s->cl; cache_bio->bi_private = &s->cl;
...@@ -1138,8 +1163,11 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s, ...@@ -1138,8 +1163,11 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s,
if (bio_alloc_pages(cache_bio, __GFP_NOWARN|GFP_NOIO)) if (bio_alloc_pages(cache_bio, __GFP_NOWARN|GFP_NOIO))
goto out_put; goto out_put;
if (reada)
bch_mark_cache_readahead(s->iop.c, s->d);
s->cache_miss = miss; s->cache_miss = miss;
s->cache_bio = cache_bio; s->iop.bio = cache_bio;
bio_get(cache_bio); bio_get(cache_bio);
closure_bio_submit(cache_bio, &s->cl, s->d); closure_bio_submit(cache_bio, &s->cl, s->d);
...@@ -1157,7 +1185,7 @@ static void cached_dev_read(struct cached_dev *dc, struct search *s) ...@@ -1157,7 +1185,7 @@ static void cached_dev_read(struct cached_dev *dc, struct search *s)
{ {
struct closure *cl = &s->cl; 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); continue_at(cl, cached_dev_read_done_bh, NULL);
} }
...@@ -1179,7 +1207,7 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s) ...@@ -1179,7 +1207,7 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s)
struct bkey start = KEY(dc->disk.id, bio->bi_sector, 0); struct bkey start = KEY(dc->disk.id, bio->bi_sector, 0);
struct bkey end = KEY(dc->disk.id, bio_end_sector(bio), 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); down_read_non_owner(&dc->writeback_lock);
if (bch_keybuf_check_overlapping(&dc->writeback_keys, &start, &end)) { if (bch_keybuf_check_overlapping(&dc->writeback_keys, &start, &end)) {
...@@ -1187,8 +1215,8 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s) ...@@ -1187,8 +1215,8 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s)
* We overlap with some dirty data undergoing background * We overlap with some dirty data undergoing background
* writeback, force this write to writeback * writeback, force this write to writeback
*/ */
s->bypass = false; s->iop.bypass = false;
s->writeback = true; s->iop.writeback = true;
} }
/* /*
...@@ -1199,27 +1227,25 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s) ...@@ -1199,27 +1227,25 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s)
* so we still want to call it. * so we still want to call it.
*/ */
if (bio->bi_rw & REQ_DISCARD) if (bio->bi_rw & REQ_DISCARD)
s->bypass = true; s->iop.bypass = true;
if (should_writeback(dc, s->orig_bio, if (should_writeback(dc, s->orig_bio,
cache_mode(dc, bio), cache_mode(dc, bio),
s->bypass)) { s->iop.bypass)) {
s->bypass = false; s->iop.bypass = false;
s->writeback = true; s->iop.writeback = true;
} }
trace_bcache_write(s->orig_bio, s->writeback, s->bypass); if (s->iop.bypass) {
s->iop.bio = s->orig_bio;
if (s->bypass) { bio_get(s->iop.bio);
s->cache_bio = s->orig_bio;
bio_get(s->cache_bio);
if (!(bio->bi_rw & REQ_DISCARD) || if (!(bio->bi_rw & REQ_DISCARD) ||
blk_queue_discard(bdev_get_queue(dc->bdev))) blk_queue_discard(bdev_get_queue(dc->bdev)))
closure_bio_submit(bio, cl, s->d); closure_bio_submit(bio, cl, s->d);
} else if (s->writeback) { } else if (s->iop.writeback) {
bch_writeback_add(dc); bch_writeback_add(dc);
s->cache_bio = bio; s->iop.bio = bio;
if (bio->bi_rw & REQ_FLUSH) { if (bio->bi_rw & REQ_FLUSH) {
/* Also need to send a flush to the backing device */ /* Also need to send a flush to the backing device */
...@@ -1234,13 +1260,13 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s) ...@@ -1234,13 +1260,13 @@ static void cached_dev_write(struct cached_dev *dc, struct search *s)
closure_bio_submit(flush, cl, s->d); closure_bio_submit(flush, cl, s->d);
} }
} else { } else {
s->cache_bio = bio_clone_bioset(bio, GFP_NOIO, s->iop.bio = bio_clone_bioset(bio, GFP_NOIO,
dc->disk.bio_split); dc->disk.bio_split);
closure_bio_submit(bio, cl, s->d); 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); continue_at(cl, cached_dev_write_complete, NULL);
} }
...@@ -1249,8 +1275,8 @@ static void cached_dev_nodata(struct closure *cl) ...@@ -1249,8 +1275,8 @@ static void cached_dev_nodata(struct closure *cl)
struct search *s = container_of(cl, struct search, cl); struct search *s = container_of(cl, struct search, cl);
struct bio *bio = &s->bio.bio; struct bio *bio = &s->bio.bio;
if (s->flush_journal) if (s->iop.flush_journal)
bch_journal_meta(s->c, cl); bch_journal_meta(s->iop.c, cl);
/* If it's a flush, we send the flush to the backing device too */ /* If it's a flush, we send the flush to the backing device too */
closure_bio_submit(bio, cl, s->d); closure_bio_submit(bio, cl, s->d);
...@@ -1277,7 +1303,7 @@ static void cached_dev_make_request(struct request_queue *q, struct bio *bio) ...@@ -1277,7 +1303,7 @@ static void cached_dev_make_request(struct request_queue *q, struct bio *bio)
if (cached_dev_get(dc)) { if (cached_dev_get(dc)) {
s = search_alloc(bio, d); s = search_alloc(bio, d);
trace_bcache_request_start(s, bio); trace_bcache_request_start(s->d, bio);
if (!bio->bi_size) { if (!bio->bi_size) {
/* /*
...@@ -1288,7 +1314,7 @@ static void cached_dev_make_request(struct request_queue *q, struct bio *bio) ...@@ -1288,7 +1314,7 @@ static void cached_dev_make_request(struct request_queue *q, struct bio *bio)
cached_dev_nodata, cached_dev_nodata,
bcache_wq); bcache_wq);
} else { } else {
s->bypass = check_should_bypass(dc, s); s->iop.bypass = check_should_bypass(dc, bio);
if (rw) if (rw)
cached_dev_write(dc, s); cached_dev_write(dc, s);
...@@ -1378,8 +1404,8 @@ static void flash_dev_nodata(struct closure *cl) ...@@ -1378,8 +1404,8 @@ static void flash_dev_nodata(struct closure *cl)
{ {
struct search *s = container_of(cl, struct search, cl); struct search *s = container_of(cl, struct search, cl);
if (s->flush_journal) if (s->iop.flush_journal)
bch_journal_meta(s->c, cl); bch_journal_meta(s->iop.c, cl);
continue_at(cl, search_free, NULL); continue_at(cl, search_free, NULL);
} }
...@@ -1400,7 +1426,7 @@ static void flash_dev_make_request(struct request_queue *q, struct bio *bio) ...@@ -1400,7 +1426,7 @@ static void flash_dev_make_request(struct request_queue *q, struct bio *bio)
cl = &s->cl; cl = &s->cl;
bio = &s->bio.bio; bio = &s->bio.bio;
trace_bcache_request_start(s, bio); trace_bcache_request_start(s->d, bio);
if (!bio->bi_size) { if (!bio->bi_size) {
/* /*
...@@ -1411,17 +1437,17 @@ static void flash_dev_make_request(struct request_queue *q, struct bio *bio) ...@@ -1411,17 +1437,17 @@ static void flash_dev_make_request(struct request_queue *q, struct bio *bio)
flash_dev_nodata, flash_dev_nodata,
bcache_wq); bcache_wq);
} else if (rw) { } 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->bi_sector, 0),
&KEY(d->id, bio_end_sector(bio), 0)); &KEY(d->id, bio_end_sector(bio), 0));
s->bypass = (bio->bi_rw & REQ_DISCARD) != 0; s->iop.bypass = (bio->bi_rw & REQ_DISCARD) != 0;
s->writeback = true; s->iop.writeback = true;
s->cache_bio = bio; s->iop.bio = bio;
closure_call(&s->btree, bch_data_insert, NULL, cl); closure_call(&s->iop.cl, bch_data_insert, NULL, cl);
} else { } else {
closure_call(&s->btree, cache_lookup, NULL, cl); closure_call(&s->iop.cl, cache_lookup, NULL, cl);
} }
continue_at(cl, search_free, NULL); continue_at(cl, search_free, NULL);
......
drivers/md/bcache/request.h
View file @ 220bb38c
...@@ -3,46 +3,25 @@ ...@@ -3,46 +3,25 @@
#include <linux/cgroup.h> #include <linux/cgroup.h>
struct search { struct data_insert_op {
/* Stack frame for bio_complete */
struct closure cl; struct closure cl;
struct closure btree;
struct bcache_device *d;
struct cache_set *c; struct cache_set *c;
struct task_struct *task; struct task_struct *task;
struct bio *bio;
struct bbio bio;
struct bio *orig_bio;
struct bio *cache_miss;
/* Bio to be inserted into the cache */
struct bio *cache_bio;
unsigned cache_bio_sectors;
unsigned inode; unsigned inode;
uint16_t write_prio;
short error;
unsigned recoverable:1;
unsigned unaligned_bvec:1;
unsigned write:1;
unsigned writeback:1;
unsigned csum:1;
unsigned bypass:1; unsigned bypass:1;
unsigned writeback:1;
unsigned flush_journal:1; unsigned flush_journal:1;
unsigned csum:1;
unsigned insert_data_done:1;
unsigned replace:1; unsigned replace:1;
unsigned insert_collision:1; unsigned replace_collision:1;
uint16_t write_prio;
/* IO error returned to s->bio */
short error;
unsigned long start_time;
struct btree_op op; unsigned insert_data_done:1;
/* Anything past this point won't get zeroed in search_alloc() */ /* Anything past this point won't get zeroed in search_alloc() */
struct keylist insert_keys; struct keylist insert_keys;
......
drivers/md/bcache/stats.c
View file @ 220bb38c
...@@ -7,7 +7,6 @@ ...@@ -7,7 +7,6 @@
#include "bcache.h" #include "bcache.h"
#include "stats.h" #include "stats.h"
#include "btree.h" #include "btree.h"
#include "request.h"
#include "sysfs.h" #include "sysfs.h"
/* /*
...@@ -196,35 +195,36 @@ static void mark_cache_stats(struct cache_stat_collector *stats, ...@@ -196,35 +195,36 @@ static void mark_cache_stats(struct cache_stat_collector *stats,
atomic_inc(&stats->cache_bypass_misses); atomic_inc(&stats->cache_bypass_misses);
} }
void bch_mark_cache_accounting(struct search *s, bool hit, bool bypass) void bch_mark_cache_accounting(struct cache_set *c, struct bcache_device *d,
bool hit, bool bypass)
{ {
struct cached_dev *dc = container_of(s->d, struct cached_dev, disk); struct cached_dev *dc = container_of(d, struct cached_dev, disk);
mark_cache_stats(&dc->accounting.collector, hit, bypass); mark_cache_stats(&dc->accounting.collector, hit, bypass);
mark_cache_stats(&s->c->accounting.collector, hit, bypass); mark_cache_stats(&c->accounting.collector, hit, bypass);
#ifdef CONFIG_CGROUP_BCACHE #ifdef CONFIG_CGROUP_BCACHE
mark_cache_stats(&(bch_bio_to_cgroup(s->orig_bio)->stats), hit, bypass); mark_cache_stats(&(bch_bio_to_cgroup(s->orig_bio)->stats), hit, bypass);
#endif #endif
} }
void bch_mark_cache_readahead(struct search *s) void bch_mark_cache_readahead(struct cache_set *c, struct bcache_device *d)
{ {
struct cached_dev *dc = container_of(s->d, struct cached_dev, disk); struct cached_dev *dc = container_of(d, struct cached_dev, disk);
atomic_inc(&dc->accounting.collector.cache_readaheads); atomic_inc(&dc->accounting.collector.cache_readaheads);
atomic_inc(&s->c->accounting.collector.cache_readaheads); atomic_inc(&c->accounting.collector.cache_readaheads);
} }
void bch_mark_cache_miss_collision(struct search *s) void bch_mark_cache_miss_collision(struct cache_set *c, struct bcache_device *d)
{ {
struct cached_dev *dc = container_of(s->d, struct cached_dev, disk); struct cached_dev *dc = container_of(d, struct cached_dev, disk);
atomic_inc(&dc->accounting.collector.cache_miss_collisions); atomic_inc(&dc->accounting.collector.cache_miss_collisions);
atomic_inc(&s->c->accounting.collector.cache_miss_collisions); atomic_inc(&c->accounting.collector.cache_miss_collisions);
} }
void bch_mark_sectors_bypassed(struct search *s, int sectors) void bch_mark_sectors_bypassed(struct cache_set *c, struct cached_dev *dc,
int sectors)
{ {
struct cached_dev *dc = container_of(s->d, struct cached_dev, disk);
atomic_add(sectors, &dc->accounting.collector.sectors_bypassed); atomic_add(sectors, &dc->accounting.collector.sectors_bypassed);
atomic_add(sectors, &s->c->accounting.collector.sectors_bypassed); atomic_add(sectors, &c->accounting.collector.sectors_bypassed);
} }
void bch_cache_accounting_init(struct cache_accounting *acc, void bch_cache_accounting_init(struct cache_accounting *acc,
......
drivers/md/bcache/stats.h
View file @ 220bb38c
...@@ -38,7 +38,9 @@ struct cache_accounting { ...@@ -38,7 +38,9 @@ struct cache_accounting {
struct cache_stats day; struct cache_stats day;
}; };
struct search; struct cache_set;
struct cached_dev;
struct bcache_device;
void bch_cache_accounting_init(struct cache_accounting *acc, void bch_cache_accounting_init(struct cache_accounting *acc,
struct closure *parent); struct closure *parent);
...@@ -50,9 +52,10 @@ void bch_cache_accounting_clear(struct cache_accounting *acc); ...@@ -50,9 +52,10 @@ void bch_cache_accounting_clear(struct cache_accounting *acc);
void bch_cache_accounting_destroy(struct cache_accounting *acc); void bch_cache_accounting_destroy(struct cache_accounting *acc);
void bch_mark_cache_accounting(struct search *s, bool hit, bool bypass); void bch_mark_cache_accounting(struct cache_set *, struct bcache_device *,
void bch_mark_cache_readahead(struct search *s); bool, bool);
void bch_mark_cache_miss_collision(struct search *s); void bch_mark_cache_readahead(struct cache_set *, struct bcache_device *);
void bch_mark_sectors_bypassed(struct search *s, int sectors); void bch_mark_cache_miss_collision(struct cache_set *, struct bcache_device *);
void bch_mark_sectors_bypassed(struct cache_set *, struct cached_dev *, int);
#endif /* _BCACHE_STATS_H_ */ #endif /* _BCACHE_STATS_H_ */
drivers/md/bcache/trace.c
View file @ 220bb38c
#include "bcache.h" #include "bcache.h"
#include "btree.h" #include "btree.h"
#include "request.h"
#include <linux/blktrace_api.h> #include <linux/blktrace_api.h>
#include <linux/module.h> #include <linux/module.h>
......
include/trace/events/bcache.h
View file @ 220bb38c
...@@ -6,11 +6,9 @@ ...@@ -6,11 +6,9 @@
#include <linux/tracepoint.h> #include <linux/tracepoint.h>
struct search;
DECLARE_EVENT_CLASS(bcache_request, DECLARE_EVENT_CLASS(bcache_request,
TP_PROTO(struct search *s, struct bio *bio), TP_PROTO(struct bcache_device *d, struct bio *bio),
TP_ARGS(s, bio), TP_ARGS(d, bio),
TP_STRUCT__entry( TP_STRUCT__entry(
__field(dev_t, dev ) __field(dev_t, dev )
...@@ -24,8 +22,8 @@ DECLARE_EVENT_CLASS(bcache_request, ...@@ -24,8 +22,8 @@ DECLARE_EVENT_CLASS(bcache_request,
TP_fast_assign( TP_fast_assign(
__entry->dev = bio->bi_bdev->bd_dev; __entry->dev = bio->bi_bdev->bd_dev;
__entry->orig_major = s->d->disk->major; __entry->orig_major = d->disk->major;
__entry->orig_minor = s->d->disk->first_minor; __entry->orig_minor = d->disk->first_minor;
__entry->sector = bio->bi_sector; __entry->sector = bio->bi_sector;
__entry->orig_sector = bio->bi_sector - 16; __entry->orig_sector = bio->bi_sector - 16;
__entry->nr_sector = bio->bi_size >> 9; __entry->nr_sector = bio->bi_size >> 9;
...@@ -79,13 +77,13 @@ DECLARE_EVENT_CLASS(btree_node, ...@@ -79,13 +77,13 @@ DECLARE_EVENT_CLASS(btree_node,
/* request.c */ /* request.c */
DEFINE_EVENT(bcache_request, bcache_request_start, DEFINE_EVENT(bcache_request, bcache_request_start,
TP_PROTO(struct search *s, struct bio *bio), TP_PROTO(struct bcache_device *d, struct bio *bio),
TP_ARGS(s, bio) TP_ARGS(d, bio)
); );
DEFINE_EVENT(bcache_request, bcache_request_end, DEFINE_EVENT(bcache_request, bcache_request_end,
TP_PROTO(struct search *s, struct bio *bio), TP_PROTO(struct bcache_device *d, struct bio *bio),
TP_ARGS(s, bio) TP_ARGS(d, bio)
); );
DECLARE_EVENT_CLASS(bcache_bio, DECLARE_EVENT_CLASS(bcache_bio,
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7