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authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-16 22:36:39 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-16 22:36:39 +0300
commit11efae3506d882a8782bc89493a32e467defd6b9 (patch)
tree4671e72e14bb5f03e484ade6526ccfd1a40f75b8 /drivers/md/raid5-ppl.c
parent465c209db83e2cdaeb4a52f4e107a9fc636704db (diff)
parentf6d85f04e29859dd3ea65395c05925da352dae89 (diff)
downloadlinux-11efae3506d882a8782bc89493a32e467defd6b9.tar.xz
Merge tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block
Pull more block layer changes from Jens Axboe: "This is a collection of both stragglers, and fixes that came in after I finalized the initial pull. This contains: - An MD pull request from Song, with a few minor fixes - Set of NVMe patches via Christoph - Pull request from Konrad, with a few fixes for xen/blkback - pblk fix IO calculation fix (Javier) - Segment calculation fix for pass-through (Ming) - Fallthrough annotation for blkcg (Mathieu)" * tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block: (25 commits) blkcg: annotate implicit fall through nvme-tcp: support C2HData with SUCCESS flag nvmet: ignore EOPNOTSUPP for discard nvme: add proper write zeroes setup for the multipath device nvme: add proper discard setup for the multipath device nvme: remove nvme_ns_config_oncs nvme: disable Write Zeroes for qemu controllers nvmet-fc: bring Disconnect into compliance with FC-NVME spec nvmet-fc: fix issues with targetport assoc_list list walking nvme-fc: reject reconnect if io queue count is reduced to zero nvme-fc: fix numa_node when dev is null nvme-fc: use nr_phys_segments to determine existence of sgl nvme-loop: init nvmet_ctrl fatal_err_work when allocate nvme: update comment to make the code easier to read nvme: put ns_head ref if namespace fails allocation nvme-trace: fix cdw10 buffer overrun nvme: don't warn on block content change effects nvme: add get-feature to admin cmds tracer md: Fix failed allocation of md_register_thread It's wrong to add len to sector_nr in raid10 reshape twice ...
Diffstat (limited to 'drivers/md/raid5-ppl.c')
-rw-r--r--drivers/md/raid5-ppl.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/md/raid5-ppl.c b/drivers/md/raid5-ppl.c
index 0b096ddc9c1e..17e9e7d51097 100644
--- a/drivers/md/raid5-ppl.c
+++ b/drivers/md/raid5-ppl.c
@@ -20,6 +20,7 @@
#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
@@ -115,6 +116,8 @@ 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 {
@@ -474,6 +477,7 @@ 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);
@@ -503,6 +507,7 @@ 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);
@@ -1407,6 +1412,7 @@ 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));
@@ -1501,3 +1507,60 @@ 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);