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

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

drivers/md/bcache/debug.c

+9 −29
Original line number Diff line number Diff line
@@ -8,7 +8,6 @@ 
#include "bcache.h"

#include "btree.h"

#include "debug.h"

#include "request.h"



#include <linux/console.h>

#include <linux/debugfs.h>
@@ -176,42 +175,25 @@ void bch_btree_verify(struct btree *b, struct bset *new) 
	mutex_unlock(&b->c->verify_lock);

}



static void data_verify_endio(struct bio *bio, int error)

{

	struct closure *cl = bio->bi_private;

	closure_put(cl);

}



void bch_data_verify(struct search *s)

void bch_data_verify(struct cached_dev *dc, struct bio *bio)

{

	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_vec *bv;

	int i;



	if (!s->unaligned_bvec)

		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);

	check = bio_clone(bio, GFP_NOIO);

	if (!check)

		return;



	if (bio_alloc_pages(check, GFP_NOIO))

		goto out_put;



	check->bi_rw		= READ_SYNC;

	check->bi_private	= cl;

	check->bi_end_io	= data_verify_endio;



	closure_bio_submit(check, cl, &dc->disk);

	closure_sync(cl);

	submit_bio_wait(READ_SYNC, check);



	bio_for_each_segment(bv, s->orig_bio, i) {

		void *p1 = kmap(bv->bv_page);

		void *p2 = kmap(check->bi_io_vec[i].bv_page);

	bio_for_each_segment(bv, bio, i) {

		void *p1 = kmap_atomic(bv->bv_page);

		void *p2 = page_address(check->bi_io_vec[i].bv_page);



		if (memcmp(p1 + bv->bv_offset,

			   p2 + bv->bv_offset,
@@ -219,13 +201,11 @@ void bch_data_verify(struct search *s) 
			printk(KERN_ERR

			       "bcache (%s): verify failed at sector %llu\n",

			       bdevname(dc->bdev, name),

			       (uint64_t) s->orig_bio->bi_sector);



		kunmap(bv->bv_page);

		kunmap(check->bi_io_vec[i].bv_page);

			       (uint64_t) bio->bi_sector);

		kunmap_atomic(p1);

	}



	__bio_for_each_segment(bv, check, i, 0)

	bio_for_each_segment_all(bv, check, i)

		__free_page(bv->bv_page);

out_put:

	bio_put(check);

drivers/md/bcache/debug.h

+2 −2
Original line number Diff line number Diff line
@@ -29,12 +29,12 @@ void bch_check_keys(struct btree *, const char *, ...); 
#ifdef CONFIG_BCACHE_DEBUG



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 */



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

drivers/md/bcache/movinggc.c

+27 −29
Original line number Diff line number Diff line
@@ -12,8 +12,9 @@ 
#include <trace/events/bcache.h>



struct moving_io {

	struct closure		cl;

	struct keybuf_key	*w;

	struct search		s;

	struct data_insert_op	op;

	struct bbio		bio;

};
@@ -38,13 +39,13 @@ static bool moving_pred(struct keybuf *buf, struct bkey *k) 


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);

}



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_vec *bv;

	int i;
@@ -52,12 +53,12 @@ static void write_moving_finish(struct closure *cl) 
	bio_for_each_segment_all(bv, bio, i)

		__free_page(bv->bv_page);



	if (io->s.insert_collision)

	if (io->op.replace_collision)

		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);

}
@@ -65,12 +66,12 @@ static void write_moving_finish(struct closure *cl) 
static void read_moving_endio(struct bio *bio, int error)

{

	struct moving_io *io = container_of(bio->bi_private,

					    struct moving_io, s.cl);

					    struct moving_io, cl);



	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)
@@ -84,32 +85,30 @@ static void moving_init(struct moving_io *io) 
	bio->bi_size		= KEY_SIZE(&io->w->key) << 9;

	bio->bi_max_vecs	= DIV_ROUND_UP(KEY_SIZE(&io->w->key),

					       PAGE_SECTORS);

	bio->bi_private		= &io->s.cl;

	bio->bi_private		= &io->cl;

	bio->bi_io_vec		= bio->bi_inline_vecs;

	bch_bio_map(bio, NULL);

}



static void write_moving(struct closure *cl)

{

	struct search *s = container_of(cl, struct search, cl);

	struct moving_io *io = container_of(s, struct moving_io, s);

	struct moving_io *io = container_of(cl, struct moving_io, cl);

	struct data_insert_op *op = &io->op;



	if (!s->error) {

	if (!op->error) {

		moving_init(io);



		io->bio.bio.bi_sector = KEY_START(&io->w->key);

		s->op.lock		= -1;

		s->write_prio		= 1;

		s->cache_bio		= &io->bio.bio;

		op->write_prio		= 1;

		op->bio			= &io->bio.bio;



		s->writeback		= KEY_DIRTY(&io->w->key);

		s->csum			= KEY_CSUM(&io->w->key);

		op->writeback		= KEY_DIRTY(&io->w->key);

		op->csum		= KEY_CSUM(&io->w->key);



		bkey_copy(&s->replace_key, &io->w->key);

		s->replace = true;

		bkey_copy(&op->replace_key, &io->w->key);

		op->replace		= true;



		closure_init(&s->btree, cl);

		bch_data_insert(&s->btree);

		closure_call(&op->cl, bch_data_insert, NULL, cl);

	}



	continue_at(cl, write_moving_finish, system_wq);
@@ -117,11 +116,10 @@ static void write_moving(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(s, struct moving_io, s);

	struct moving_io *io = container_of(cl, struct moving_io, cl);

	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);

}
@@ -151,8 +149,8 @@ static void read_moving(struct cache_set *c) 


		w->private	= io;

		io->w		= w;

		io->s.inode	= KEY_INODE(&w->key);

		io->s.c		= c;

		io->op.inode	= KEY_INODE(&w->key);

		io->op.c	= c;



		moving_init(io);

		bio = &io->bio.bio;
@@ -166,7 +164,7 @@ static void read_moving(struct cache_set *c) 
		trace_bcache_gc_copy(&w->key);



		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) {

drivers/md/bcache/request.c

+303 −277

File changed.

Preview size limit exceeded, changes collapsed.

drivers/md/bcache/request.h

+8 −29
Original line number Diff line number Diff line
@@ -3,46 +3,25 @@ 


#include <linux/cgroup.h>



struct search {

	/* Stack frame for bio_complete */

struct data_insert_op {

	struct closure		cl;

	struct closure		btree;



	struct bcache_device	*d;

	struct cache_set	*c;

	struct task_struct	*task;



	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;

	struct bio		*bio;



	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		writeback:1;

	unsigned		flush_journal:1;

	unsigned		csum:1;



	unsigned		insert_data_done:1;

	unsigned		replace:1;

	unsigned		insert_collision:1;



	uint16_t		write_prio;



	/* IO error returned to s->bio */

	short			error;

	unsigned long		start_time;

	unsigned		replace_collision:1;



	struct btree_op		op;

	unsigned		insert_data_done:1;



	/* Anything past this point won't get zeroed in search_alloc() */

	struct keylist		insert_keys;