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linux/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>
2013-03-23 23:11:31 +00:00
#ifndef _BCACHE_REQUEST_H_
#define _BCACHE_REQUEST_H_
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: Kent Overstreet <kmo@daterainc.com>
2013-09-11 02:02:45 +00:00
struct data_insert_op {
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>
2013-03-23 23:11:31 +00:00
struct closure cl;
bcache: Prune struct btree_op Eventual goal is for struct btree_op to contain only what is necessary for traversing the btree. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-07-25 00:44:17 +00:00
struct cache_set *c;
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: Kent Overstreet <kmo@daterainc.com>
2013-09-11 02:02:45 +00:00
struct bio *bio;
bcache: Fix moving_gc deadlocking with a foreground write Deadlock happened because a foreground write slept, waiting for a bucket to be allocated. Normally the gc would mark buckets available for invalidation. But the moving_gc was stuck waiting for outstanding writes to complete. These writes used the bcache_wq, the same queue foreground writes used. This fix gives moving_gc its own work queue, so it was still finish moving even if foreground writes are stuck waiting for allocation. It also makes work queue a parameter to the data_insert path, so moving_gc can use its workqueue for writes. Signed-off-by: Nicholas Swenson <nks@daterainc.com> Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2014-01-10 00:03:04 +00:00
struct workqueue_struct *wq;
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>
2013-03-23 23:11:31 +00:00
bcache: Prune struct btree_op Eventual goal is for struct btree_op to contain only what is necessary for traversing the btree. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-07-25 00:44:17 +00:00
unsigned inode;
bcache: Move sector allocator to alloc.c Just reorganizing things a bit. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-07-25 01:11:11 +00:00
uint16_t write_point;
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: Kent Overstreet <kmo@daterainc.com>
2013-09-11 02:02:45 +00:00
uint16_t write_prio;
short error;
bcache: Prune struct btree_op Eventual goal is for struct btree_op to contain only what is necessary for traversing the btree. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-07-25 00:44:17 +00:00
bcache: Zero less memory Another minor performance optimization Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-09-11 02:16:31 +00:00
union {
uint16_t flags;
bcache: Prune struct btree_op Eventual goal is for struct btree_op to contain only what is necessary for traversing the btree. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-07-25 00:44:17 +00:00
bcache: Zero less memory Another minor performance optimization Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-09-11 02:16:31 +00:00
struct {
unsigned bypass:1;
unsigned writeback:1;
unsigned flush_journal:1;
unsigned csum:1;
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>
2013-03-23 23:11:31 +00:00
bcache: Zero less memory Another minor performance optimization Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-09-11 02:16:31 +00:00
unsigned replace:1;
unsigned replace_collision:1;
unsigned insert_data_done:1;
};
};
bcache: Move keylist out of btree_op Slowly working on pruning struct btree_op - the aim is for it to only contain things that are actually necessary for traversing the btree. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-07-25 00:26:51 +00:00
struct keylist insert_keys;
bcache: Kill op->replace This is prep work for converting bch_btree_insert to bch_btree_map_leaf_nodes() - we have to convert all its arguments to actual arguments. Bunch of churn, but should be straightforward. Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-09-11 01:52:54 +00:00
BKEY_PADDED(replace_key);
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>
2013-03-23 23:11:31 +00:00
};
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>
2013-04-26 22:39:55 +00:00
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 00:07:04 +00:00
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>
2013-03-23 23:11:31 +00:00
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;
#endif /* _BCACHE_REQUEST_H_ */
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