diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/raid5-log.h | 1 | ||||
| -rw-r--r-- | drivers/md/raid5-ppl.c | 63 | ||||
| -rw-r--r-- | drivers/md/raid5.c | 1 |
3 files changed, 65 insertions, 0 deletions
diff --git a/drivers/md/raid5-log.h b/drivers/md/raid5-log.h index bfb811407061..43c714a8798c 100644 --- a/drivers/md/raid5-log.h +++ b/drivers/md/raid5-log.h @@ -45,6 +45,7 @@ extern void ppl_stripe_write_finished(struct stripe_head *sh); extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add); extern void ppl_quiesce(struct r5conf *conf, int quiesce); extern int ppl_handle_flush_request(struct r5l_log *log, struct bio *bio); +extern struct md_sysfs_entry ppl_write_hint; static inline bool raid5_has_log(struct r5conf *conf) { diff --git a/drivers/md/raid5-ppl.c b/drivers/md/raid5-ppl.c index 3a7c36326589..f2b3020c2ac8 100644 --- a/drivers/md/raid5-ppl.c +++ b/drivers/md/raid5-ppl.c @@ -21,6 +21,7 @@ #include <linux/raid/md_p.h> #include "md.h" #include "raid5.h" +#include "raid5-log.h" /* * PPL consists of a 4KB header (struct ppl_header) and at least 128KB for @@ -116,6 +117,8 @@ struct ppl_conf { /* stripes to retry if failed to allocate io_unit */ struct list_head no_mem_stripes; spinlock_t no_mem_stripes_lock; + + unsigned short write_hint; }; struct ppl_log { @@ -476,6 +479,7 @@ static void ppl_submit_iounit(struct ppl_io_unit *io) bio_set_dev(bio, log->rdev->bdev); bio->bi_iter.bi_sector = log->next_io_sector; bio_add_page(bio, io->header_page, PAGE_SIZE, 0); + bio->bi_write_hint = ppl_conf->write_hint; pr_debug("%s: log->current_io_sector: %llu\n", __func__, (unsigned long long)log->next_io_sector); @@ -505,6 +509,7 @@ static void ppl_submit_iounit(struct ppl_io_unit *io) bio = bio_alloc_bioset(GFP_NOIO, BIO_MAX_PAGES, &ppl_conf->bs); bio->bi_opf = prev->bi_opf; + bio->bi_write_hint = prev->bi_write_hint; bio_copy_dev(bio, prev); bio->bi_iter.bi_sector = bio_end_sector(prev); bio_add_page(bio, sh->ppl_page, PAGE_SIZE, 0); @@ -1409,6 +1414,7 @@ int ppl_init_log(struct r5conf *conf) atomic64_set(&ppl_conf->seq, 0); INIT_LIST_HEAD(&ppl_conf->no_mem_stripes); spin_lock_init(&ppl_conf->no_mem_stripes_lock); + ppl_conf->write_hint = RWF_WRITE_LIFE_NOT_SET; if (!mddev->external) { ppl_conf->signature = ~crc32c_le(~0, mddev->uuid, sizeof(mddev->uuid)); @@ -1503,3 +1509,60 @@ int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add) return ret; } + +static ssize_t +ppl_write_hint_show(struct mddev *mddev, char *buf) +{ + size_t ret = 0; + struct r5conf *conf; + struct ppl_conf *ppl_conf = NULL; + + spin_lock(&mddev->lock); + conf = mddev->private; + if (conf && raid5_has_ppl(conf)) + ppl_conf = conf->log_private; + ret = sprintf(buf, "%d\n", ppl_conf ? ppl_conf->write_hint : 0); + spin_unlock(&mddev->lock); + + return ret; +} + +static ssize_t +ppl_write_hint_store(struct mddev *mddev, const char *page, size_t len) +{ + struct r5conf *conf; + struct ppl_conf *ppl_conf; + int err = 0; + unsigned short new; + + if (len >= PAGE_SIZE) + return -EINVAL; + if (kstrtou16(page, 10, &new)) + return -EINVAL; + + err = mddev_lock(mddev); + if (err) + return err; + + conf = mddev->private; + if (!conf) { + err = -ENODEV; + } else if (raid5_has_ppl(conf)) { + ppl_conf = conf->log_private; + if (!ppl_conf) + err = -EINVAL; + else + ppl_conf->write_hint = new; + } else { + err = -EINVAL; + } + + mddev_unlock(mddev); + + return err ?: len; +} + +struct md_sysfs_entry +ppl_write_hint = __ATTR(ppl_write_hint, S_IRUGO | S_IWUSR, + ppl_write_hint_show, + ppl_write_hint_store); diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index cecea901ab8c..09562d7cc080 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -6660,6 +6660,7 @@ static struct attribute *raid5_attrs[] = { &raid5_skip_copy.attr, &raid5_rmw_level.attr, &r5c_journal_mode.attr, + &ppl_write_hint.attr, NULL, }; static struct attribute_group raid5_attrs_group = { |