mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
fc2d5988b5
There are many function definitions do not have identifier argument names, scripts/checkpatch.pl complains warnings like this, WARNING: function definition argument 'struct bcache_device *' should also have an identifier name #16735: FILE: writeback.h:120: +void bch_sectors_dirty_init(struct bcache_device *); This patch adds identifier argument names to all bcache function definitions to fix such warnings. Signed-off-by: Coly Li <colyli@suse.de> Reviewed: Shenghui Wang <shhuiw@foxmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _BCACHE_WRITEBACK_H
|
|
#define _BCACHE_WRITEBACK_H
|
|
|
|
#define CUTOFF_WRITEBACK 40
|
|
#define CUTOFF_WRITEBACK_SYNC 70
|
|
|
|
#define MAX_WRITEBACKS_IN_PASS 5
|
|
#define MAX_WRITESIZE_IN_PASS 5000 /* *512b */
|
|
|
|
#define WRITEBACK_RATE_UPDATE_SECS_MAX 60
|
|
#define WRITEBACK_RATE_UPDATE_SECS_DEFAULT 5
|
|
|
|
/*
|
|
* 14 (16384ths) is chosen here as something that each backing device
|
|
* should be a reasonable fraction of the share, and not to blow up
|
|
* until individual backing devices are a petabyte.
|
|
*/
|
|
#define WRITEBACK_SHARE_SHIFT 14
|
|
|
|
static inline uint64_t bcache_dev_sectors_dirty(struct bcache_device *d)
|
|
{
|
|
uint64_t i, ret = 0;
|
|
|
|
for (i = 0; i < d->nr_stripes; i++)
|
|
ret += atomic_read(d->stripe_sectors_dirty + i);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline unsigned int offset_to_stripe(struct bcache_device *d,
|
|
uint64_t offset)
|
|
{
|
|
do_div(offset, d->stripe_size);
|
|
return offset;
|
|
}
|
|
|
|
static inline bool bcache_dev_stripe_dirty(struct cached_dev *dc,
|
|
uint64_t offset,
|
|
unsigned int nr_sectors)
|
|
{
|
|
unsigned int stripe = offset_to_stripe(&dc->disk, offset);
|
|
|
|
while (1) {
|
|
if (atomic_read(dc->disk.stripe_sectors_dirty + stripe))
|
|
return true;
|
|
|
|
if (nr_sectors <= dc->disk.stripe_size)
|
|
return false;
|
|
|
|
nr_sectors -= dc->disk.stripe_size;
|
|
stripe++;
|
|
}
|
|
}
|
|
|
|
static inline bool should_writeback(struct cached_dev *dc, struct bio *bio,
|
|
unsigned int cache_mode, bool would_skip)
|
|
{
|
|
unsigned int in_use = dc->disk.c->gc_stats.in_use;
|
|
|
|
if (cache_mode != CACHE_MODE_WRITEBACK ||
|
|
test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) ||
|
|
in_use > CUTOFF_WRITEBACK_SYNC)
|
|
return false;
|
|
|
|
if (dc->partial_stripes_expensive &&
|
|
bcache_dev_stripe_dirty(dc, bio->bi_iter.bi_sector,
|
|
bio_sectors(bio)))
|
|
return true;
|
|
|
|
if (would_skip)
|
|
return false;
|
|
|
|
return (op_is_sync(bio->bi_opf) ||
|
|
bio->bi_opf & (REQ_META|REQ_PRIO) ||
|
|
in_use <= CUTOFF_WRITEBACK);
|
|
}
|
|
|
|
static inline void bch_writeback_queue(struct cached_dev *dc)
|
|
{
|
|
if (!IS_ERR_OR_NULL(dc->writeback_thread))
|
|
wake_up_process(dc->writeback_thread);
|
|
}
|
|
|
|
static inline void bch_writeback_add(struct cached_dev *dc)
|
|
{
|
|
if (!atomic_read(&dc->has_dirty) &&
|
|
!atomic_xchg(&dc->has_dirty, 1)) {
|
|
if (BDEV_STATE(&dc->sb) != BDEV_STATE_DIRTY) {
|
|
SET_BDEV_STATE(&dc->sb, BDEV_STATE_DIRTY);
|
|
/* XXX: should do this synchronously */
|
|
bch_write_bdev_super(dc, NULL);
|
|
}
|
|
|
|
bch_writeback_queue(dc);
|
|
}
|
|
}
|
|
|
|
void bcache_dev_sectors_dirty_add(struct cache_set *c, unsigned int inode,
|
|
uint64_t offset, int nr_sectors);
|
|
|
|
void bch_sectors_dirty_init(struct bcache_device *d);
|
|
void bch_cached_dev_writeback_init(struct cached_dev *dc);
|
|
int bch_cached_dev_writeback_start(struct cached_dev *dc);
|
|
|
|
#endif
|