Commit c911c46c authored by Yufen Yu's avatar Yufen Yu Committed by Song Liu
Browse files

md/raid456: convert macro STRIPE_* to RAID5_STRIPE_* 



Convert macro STRIPE_SIZE, STRIPE_SECTORS and STRIPE_SHIFT to
RAID5_STRIPE_SIZE(), RAID5_STRIPE_SECTORS() and RAID5_STRIPE_SHIFT().

This patch is prepare for the following adjustable stripe_size.
It will not change any existing functionality.

Signed-off-by: default avatarYufen Yu <yuyufen@huawei.com>
Signed-off-by: default avatarSong Liu <songliubraving@fb.com>
parent 1684e975

drivers/md/raid5-cache.c

+4 −4
Original line number Diff line number Diff line
@@ -296,8 +296,8 @@ r5c_return_dev_pending_writes(struct r5conf *conf, struct r5dev *dev) 
	wbi = dev->written;

	dev->written = NULL;

	while (wbi && wbi->bi_iter.bi_sector <

	       dev->sector + STRIPE_SECTORS) {

		wbi2 = r5_next_bio(wbi, dev->sector);

	       dev->sector + RAID5_STRIPE_SECTORS(conf)) {

		wbi2 = r5_next_bio(conf, wbi, dev->sector);

		md_write_end(conf->mddev);

		bio_endio(wbi);

		wbi = wbi2;
@@ -314,7 +314,7 @@ void r5c_handle_cached_data_endio(struct r5conf *conf, 
			set_bit(R5_UPTODATE, &sh->dev[i].flags);

			r5c_return_dev_pending_writes(conf, &sh->dev[i]);

			md_bitmap_endwrite(conf->mddev->bitmap, sh->sector,

					   STRIPE_SECTORS,

					   RAID5_STRIPE_SECTORS(conf),

					   !test_bit(STRIPE_DEGRADED, &sh->state),

					   0);

		}
@@ -362,7 +362,7 @@ void r5c_check_cached_full_stripe(struct r5conf *conf) 
	 */

	if (atomic_read(&conf->r5c_cached_full_stripes) >=

	    min(R5C_FULL_STRIPE_FLUSH_BATCH(conf),

		conf->chunk_sectors >> STRIPE_SHIFT))

		conf->chunk_sectors >> RAID5_STRIPE_SHIFT(conf)))

		r5l_wake_reclaim(conf->log, 0);

}

drivers/md/raid5-ppl.c

+6 −5
Original line number Diff line number Diff line
@@ -324,7 +324,7 @@ static int ppl_log_stripe(struct ppl_log *log, struct stripe_head *sh) 
		 * be just after the last logged stripe and write to the same

		 * disks. Use bit shift and logarithm to avoid 64-bit division.

		 */

		if ((sh->sector == sh_last->sector + STRIPE_SECTORS) &&

		if ((sh->sector == sh_last->sector + RAID5_STRIPE_SECTORS(conf)) &&

		    (data_sector >> ilog2(conf->chunk_sectors) ==

		     data_sector_last >> ilog2(conf->chunk_sectors)) &&

		    ((data_sector - data_sector_last) * data_disks ==
@@ -844,9 +844,9 @@ static int ppl_recover_entry(struct ppl_log *log, struct ppl_header_entry *e, 


	/* if start and end is 4k aligned, use a 4k block */

	if (block_size == 512 &&

	    (r_sector_first & (STRIPE_SECTORS - 1)) == 0 &&

	    (r_sector_last & (STRIPE_SECTORS - 1)) == 0)

		block_size = STRIPE_SIZE;

	    (r_sector_first & (RAID5_STRIPE_SECTORS(conf) - 1)) == 0 &&

	    (r_sector_last & (RAID5_STRIPE_SECTORS(conf) - 1)) == 0)

		block_size = RAID5_STRIPE_SIZE(conf);



	/* iterate through blocks in strip */

	for (i = 0; i < strip_sectors; i += (block_size >> 9)) {
@@ -1274,7 +1274,8 @@ static int ppl_validate_rdev(struct md_rdev *rdev) 
	ppl_data_sectors = rdev->ppl.size - (PPL_HEADER_SIZE >> 9);



	if (ppl_data_sectors > 0)

		ppl_data_sectors = rounddown(ppl_data_sectors, STRIPE_SECTORS);

		ppl_data_sectors = rounddown(ppl_data_sectors,

				RAID5_STRIPE_SECTORS((struct r5conf *)rdev->mddev->private));



	if (ppl_data_sectors <= 0) {

		pr_warn("md/raid:%s: PPL space too small on %s\n",

drivers/md/raid5.c

+123 −102

File changed.

Preview size limit exceeded, changes collapsed.

drivers/md/raid5.h

+20 −17
Original line number Diff line number Diff line
@@ -481,23 +481,6 @@ struct disk_info { 
#define HASH_MASK		(NR_HASH - 1)

#define MAX_STRIPE_BATCH	8



/* bio's attached to a stripe+device for I/O are linked together in bi_sector

 * order without overlap.  There may be several bio's per stripe+device, and

 * a bio could span several devices.

 * When walking this list for a particular stripe+device, we must never proceed

 * beyond a bio that extends past this device, as the next bio might no longer

 * be valid.

 * This function is used to determine the 'next' bio in the list, given the

 * sector of the current stripe+device

 */

static inline struct bio *r5_next_bio(struct bio *bio, sector_t sector)

{

	if (bio_end_sector(bio) < sector + STRIPE_SECTORS)

		return bio->bi_next;

	else

		return NULL;

}



/* NOTE NR_STRIPE_HASH_LOCKS must remain below 64.

 * This is because we sometimes take all the spinlocks

 * and creating that much locking depth can cause
@@ -690,6 +673,26 @@ struct r5conf { 
	struct r5pending_data	*next_pending_data;

};



#define RAID5_STRIPE_SIZE(conf)       STRIPE_SIZE

#define RAID5_STRIPE_SHIFT(conf)      STRIPE_SHIFT

#define RAID5_STRIPE_SECTORS(conf)    STRIPE_SECTORS



/* bio's attached to a stripe+device for I/O are linked together in bi_sector

 * order without overlap.  There may be several bio's per stripe+device, and

 * a bio could span several devices.

 * When walking this list for a particular stripe+device, we must never proceed

 * beyond a bio that extends past this device, as the next bio might no longer

 * be valid.

 * This function is used to determine the 'next' bio in the list, given the

 * sector of the current stripe+device

 */

static inline struct bio *r5_next_bio(struct r5conf *conf, struct bio *bio, sector_t sector)

{

	if (bio_end_sector(bio) < sector + RAID5_STRIPE_SECTORS(conf))

		return bio->bi_next;

	else

		return NULL;

}



/*

 * Our supported algorithms

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