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original_kernel/drivers/md/bcache/request.h

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bcache: A block layer cache Does writethrough and writeback caching, handles unclean shutdown, and has a bunch of other nifty features motivated by real world usage. See the wiki at http://bcache.evilpiepirate.org for more. Signed-off-by: Kent Overstreet <koverstreet@google.com>
2013-03-24 07:11:31 +08:00
#ifndef _BCACHE_REQUEST_H_
#define _BCACHE_REQUEST_H_
#include <linux/cgroup.h>
struct search {
/* Stack frame for bio_complete */
struct closure cl;
struct bcache_device *d;
struct task_struct *task;
struct bbio bio;
struct bio *orig_bio;
struct bio *cache_miss;
unsigned cache_bio_sectors;
unsigned recoverable:1;
unsigned unaligned_bvec:1;
unsigned write:1;
unsigned writeback:1;
/* IO error returned to s->bio */
short error;
unsigned long start_time;
/* Anything past op->keys won't get zeroed in do_bio_hook */
struct btree_op op;
};
void bch_cache_read_endio(struct bio *, int);
bcache: Fix/revamp tracepoints The tracepoints were reworked to be more sensible, and fixed a null pointer deref in one of the tracepoints. Converted some of the pr_debug()s to tracepoints - this is partly a performance optimization; it used to be that with DEBUG or CONFIG_DYNAMIC_DEBUG pr_debug() was an empty macro; but at some point it was changed to an empty inline function. Some of the pr_debug() statements had rather expensive function calls as part of the arguments, so this code was getting run unnecessarily even on non debug kernels - in some fast paths, too. Signed-off-by: Kent Overstreet <koverstreet@google.com>
2013-04-27 06:39:55 +08:00
unsigned bch_get_congested(struct cache_set *);
bcache: Refactor journalling flow control Making things less asynchronous that don't need to be - bch_journal() only has to block when the journal or journal entry is full, which is emphatically not a fast path. So make it a normal function that just returns when it finishes, to make the code and control flow easier to follow. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-10-25 08:07:04 +08:00
void bch_data_insert(struct closure *cl);
bcache: A block layer cache Does writethrough and writeback caching, handles unclean shutdown, and has a bunch of other nifty features motivated by real world usage. See the wiki at http://bcache.evilpiepirate.org for more. Signed-off-by: Kent Overstreet <koverstreet@google.com>
2013-03-24 07:11:31 +08:00
void bch_cache_read_endio(struct bio *, int);
void bch_open_buckets_free(struct cache_set *);
int bch_open_buckets_alloc(struct cache_set *);
void bch_cached_dev_request_init(struct cached_dev *dc);
void bch_flash_dev_request_init(struct bcache_device *d);
extern struct kmem_cache *bch_search_cache, *bch_passthrough_cache;
struct bch_cgroup {
#ifdef CONFIG_CGROUP_BCACHE
struct cgroup_subsys_state css;
#endif
/*
* We subtract one from the index into bch_cache_modes[], so that
* default == -1; this makes it so the rest match up with d->cache_mode,
* and we use d->cache_mode if cgrp->cache_mode < 0
*/
short cache_mode;
bool verify;
struct cache_stat_collector stats;
};
struct bch_cgroup *bch_bio_to_cgroup(struct bio *bio);
#endif /* _BCACHE_REQUEST_H_ */