From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/md/raid5.c | 901 +++++++++++++++++++++++++++++++++++++-------------------
1 files changed, 595 insertions(+), 306 deletions(-)
diff --git a/kernel/drivers/md/raid5.c b/kernel/drivers/md/raid5.c
index c7bda4b..0dea4aa 100644
--- a/kernel/drivers/md/raid5.c
+++ b/kernel/drivers/md/raid5.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* raid5.c : Multiple Devices driver for Linux
* Copyright (C) 1996, 1997 Ingo Molnar, Miguel de Icaza, Gadi Oxman
@@ -7,15 +8,6 @@
* RAID-4/5/6 management functions.
* Thanks to Penguin Computing for making the RAID-6 development possible
* by donating a test server!
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * You should have received a copy of the GNU General Public License
- * (for example /usr/src/linux/COPYING); if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
@@ -44,6 +36,7 @@
*/
#include <linux/blkdev.h>
+#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/raid/pq.h>
#include <linux/async_tx.h>
@@ -54,7 +47,6 @@
#include <linux/slab.h>
#include <linux/ratelimit.h>
#include <linux/nodemask.h>
-#include <linux/flex_array.h>
#include <trace/events/block.h>
#include <linux/list_sort.h>
@@ -78,13 +70,13 @@
static inline struct hlist_head *stripe_hash(struct r5conf *conf, sector_t sect)
{
- int hash = (sect >> STRIPE_SHIFT) & HASH_MASK;
+ int hash = (sect >> RAID5_STRIPE_SHIFT(conf)) & HASH_MASK;
return &conf->stripe_hashtbl[hash];
}
-static inline int stripe_hash_locks_hash(sector_t sect)
+static inline int stripe_hash_locks_hash(struct r5conf *conf, sector_t sect)
{
- return (sect >> STRIPE_SHIFT) & STRIPE_HASH_LOCKS_MASK;
+ return (sect >> RAID5_STRIPE_SHIFT(conf)) & STRIPE_HASH_LOCKS_MASK;
}
static inline void lock_device_hash_lock(struct r5conf *conf, int hash)
@@ -457,13 +449,74 @@
return sh;
}
+#if PAGE_SIZE != DEFAULT_STRIPE_SIZE
+static void free_stripe_pages(struct stripe_head *sh)
+{
+ int i;
+ struct page *p;
+
+ /* Have not allocate page pool */
+ if (!sh->pages)
+ return;
+
+ for (i = 0; i < sh->nr_pages; i++) {
+ p = sh->pages[i];
+ if (p)
+ put_page(p);
+ sh->pages[i] = NULL;
+ }
+}
+
+static int alloc_stripe_pages(struct stripe_head *sh, gfp_t gfp)
+{
+ int i;
+ struct page *p;
+
+ for (i = 0; i < sh->nr_pages; i++) {
+ /* The page have allocated. */
+ if (sh->pages[i])
+ continue;
+
+ p = alloc_page(gfp);
+ if (!p) {
+ free_stripe_pages(sh);
+ return -ENOMEM;
+ }
+ sh->pages[i] = p;
+ }
+ return 0;
+}
+
+static int
+init_stripe_shared_pages(struct stripe_head *sh, struct r5conf *conf, int disks)
+{
+ int nr_pages, cnt;
+
+ if (sh->pages)
+ return 0;
+
+ /* Each of the sh->dev[i] need one conf->stripe_size */
+ cnt = PAGE_SIZE / conf->stripe_size;
+ nr_pages = (disks + cnt - 1) / cnt;
+
+ sh->pages = kcalloc(nr_pages, sizeof(struct page *), GFP_KERNEL);
+ if (!sh->pages)
+ return -ENOMEM;
+ sh->nr_pages = nr_pages;
+ sh->stripes_per_page = cnt;
+ return 0;
+}
+#endif
+
static void shrink_buffers(struct stripe_head *sh)
{
- struct page *p;
int i;
int num = sh->raid_conf->pool_size;
+#if PAGE_SIZE == DEFAULT_STRIPE_SIZE
for (i = 0; i < num ; i++) {
+ struct page *p;
+
WARN_ON(sh->dev[i].page != sh->dev[i].orig_page);
p = sh->dev[i].page;
if (!p)
@@ -471,6 +524,11 @@
sh->dev[i].page = NULL;
put_page(p);
}
+#else
+ for (i = 0; i < num; i++)
+ sh->dev[i].page = NULL;
+ free_stripe_pages(sh); /* Free pages */
+#endif
}
static int grow_buffers(struct stripe_head *sh, gfp_t gfp)
@@ -478,6 +536,7 @@
int i;
int num = sh->raid_conf->pool_size;
+#if PAGE_SIZE == DEFAULT_STRIPE_SIZE
for (i = 0; i < num; i++) {
struct page *page;
@@ -486,8 +545,18 @@
}
sh->dev[i].page = page;
sh->dev[i].orig_page = page;
+ sh->dev[i].offset = 0;
}
+#else
+ if (alloc_stripe_pages(sh, gfp))
+ return -ENOMEM;
+ for (i = 0; i < num; i++) {
+ sh->dev[i].page = raid5_get_dev_page(sh, i);
+ sh->dev[i].orig_page = sh->dev[i].page;
+ sh->dev[i].offset = raid5_get_page_offset(sh, i);
+ }
+#endif
return 0;
}
@@ -618,17 +687,17 @@
return degraded;
}
-static int has_failed(struct r5conf *conf)
+static bool has_failed(struct r5conf *conf)
{
- int degraded;
+ int degraded = conf->mddev->degraded;
- if (conf->mddev->reshape_position == MaxSector)
- return conf->mddev->degraded > conf->max_degraded;
+ if (test_bit(MD_BROKEN, &conf->mddev->flags))
+ return true;
- degraded = raid5_calc_degraded(conf);
- if (degraded > conf->max_degraded)
- return 1;
- return 0;
+ if (conf->mddev->reshape_position != MaxSector)
+ degraded = raid5_calc_degraded(conf);
+
+ return degraded > conf->max_degraded;
}
struct stripe_head *
@@ -636,7 +705,7 @@
int previous, int noblock, int noquiesce)
{
struct stripe_head *sh;
- int hash = stripe_hash_locks_hash(sector);
+ int hash = stripe_hash_locks_hash(conf, sector);
int inc_empty_inactive_list_flag;
pr_debug("get_stripe, sector %llu\n", (unsigned long long)sector);
@@ -712,6 +781,8 @@
}
static void lock_two_stripes(struct stripe_head *sh1, struct stripe_head *sh2)
+ __acquires(&sh1->stripe_lock)
+ __acquires(&sh2->stripe_lock)
{
if (sh1 > sh2) {
spin_lock_irq(&sh2->stripe_lock);
@@ -723,6 +794,8 @@
}
static void unlock_two_stripes(struct stripe_head *sh1, struct stripe_head *sh2)
+ __releases(&sh1->stripe_lock)
+ __releases(&sh2->stripe_lock)
{
spin_unlock(&sh1->stripe_lock);
spin_unlock_irq(&sh2->stripe_lock);
@@ -753,9 +826,9 @@
tmp_sec = sh->sector;
if (!sector_div(tmp_sec, conf->chunk_sectors))
return;
- head_sector = sh->sector - STRIPE_SECTORS;
+ head_sector = sh->sector - RAID5_STRIPE_SECTORS(conf);
- hash = stripe_hash_locks_hash(head_sector);
+ hash = stripe_hash_locks_hash(conf, head_sector);
spin_lock_irq(conf->hash_locks + hash);
head = __find_stripe(conf, head_sector, conf->generation);
if (head && !atomic_inc_not_zero(&head->count)) {
@@ -878,7 +951,7 @@
struct bio *bio;
while ((bio = bio_list_pop(tmp)))
- generic_make_request(bio);
+ submit_bio_noacct(bio);
}
static int cmp_stripe(void *priv, struct list_head *a, struct list_head *b)
@@ -1062,7 +1135,7 @@
test_bit(WriteErrorSeen, &rdev->flags)) {
sector_t first_bad;
int bad_sectors;
- int bad = is_badblock(rdev, sh->sector, STRIPE_SECTORS,
+ int bad = is_badblock(rdev, sh->sector, RAID5_STRIPE_SECTORS(conf),
&first_bad, &bad_sectors);
if (!bad)
break;
@@ -1094,7 +1167,7 @@
if (rdev) {
if (s->syncing || s->expanding || s->expanded
|| s->replacing)
- md_sync_acct(rdev->bdev, STRIPE_SECTORS);
+ md_sync_acct(rdev->bdev, RAID5_STRIPE_SECTORS(conf));
set_bit(STRIPE_IO_STARTED, &sh->state);
@@ -1134,12 +1207,12 @@
else
sh->dev[i].vec.bv_page = sh->dev[i].page;
bi->bi_vcnt = 1;
- bi->bi_io_vec[0].bv_len = STRIPE_SIZE;
- bi->bi_io_vec[0].bv_offset = 0;
- bi->bi_iter.bi_size = STRIPE_SIZE;
+ bi->bi_io_vec[0].bv_len = RAID5_STRIPE_SIZE(conf);
+ bi->bi_io_vec[0].bv_offset = sh->dev[i].offset;
+ bi->bi_iter.bi_size = RAID5_STRIPE_SIZE(conf);
bi->bi_write_hint = sh->dev[i].write_hint;
if (!rrdev)
- sh->dev[i].write_hint = RWF_WRITE_LIFE_NOT_SET;
+ sh->dev[i].write_hint = RWH_WRITE_LIFE_NOT_SET;
/*
* If this is discard request, set bi_vcnt 0. We don't
* want to confuse SCSI because SCSI will replace payload
@@ -1156,12 +1229,12 @@
if (should_defer && op_is_write(op))
bio_list_add(&pending_bios, bi);
else
- generic_make_request(bi);
+ submit_bio_noacct(bi);
}
if (rrdev) {
if (s->syncing || s->expanding || s->expanded
|| s->replacing)
- md_sync_acct(rrdev->bdev, STRIPE_SECTORS);
+ md_sync_acct(rrdev->bdev, RAID5_STRIPE_SECTORS(conf));
set_bit(STRIPE_IO_STARTED, &sh->state);
@@ -1188,11 +1261,11 @@
WARN_ON(test_bit(R5_UPTODATE, &sh->dev[i].flags));
sh->dev[i].rvec.bv_page = sh->dev[i].page;
rbi->bi_vcnt = 1;
- rbi->bi_io_vec[0].bv_len = STRIPE_SIZE;
- rbi->bi_io_vec[0].bv_offset = 0;
- rbi->bi_iter.bi_size = STRIPE_SIZE;
+ rbi->bi_io_vec[0].bv_len = RAID5_STRIPE_SIZE(conf);
+ rbi->bi_io_vec[0].bv_offset = sh->dev[i].offset;
+ rbi->bi_iter.bi_size = RAID5_STRIPE_SIZE(conf);
rbi->bi_write_hint = sh->dev[i].write_hint;
- sh->dev[i].write_hint = RWF_WRITE_LIFE_NOT_SET;
+ sh->dev[i].write_hint = RWH_WRITE_LIFE_NOT_SET;
/*
* If this is discard request, set bi_vcnt 0. We don't
* want to confuse SCSI because SCSI will replace payload
@@ -1206,7 +1279,7 @@
if (should_defer && op_is_write(op))
bio_list_add(&pending_bios, rbi);
else
- generic_make_request(rbi);
+ submit_bio_noacct(rbi);
}
if (!rdev && !rrdev) {
if (op_is_write(op))
@@ -1231,7 +1304,7 @@
static struct dma_async_tx_descriptor *
async_copy_data(int frombio, struct bio *bio, struct page **page,
- sector_t sector, struct dma_async_tx_descriptor *tx,
+ unsigned int poff, sector_t sector, struct dma_async_tx_descriptor *tx,
struct stripe_head *sh, int no_skipcopy)
{
struct bio_vec bvl;
@@ -1240,6 +1313,7 @@
int page_offset;
struct async_submit_ctl submit;
enum async_tx_flags flags = 0;
+ struct r5conf *conf = sh->raid_conf;
if (bio->bi_iter.bi_sector >= sector)
page_offset = (signed)(bio->bi_iter.bi_sector - sector) * 512;
@@ -1261,8 +1335,8 @@
len -= b_offset;
}
- if (len > 0 && page_offset + len > STRIPE_SIZE)
- clen = STRIPE_SIZE - page_offset;
+ if (len > 0 && page_offset + len > RAID5_STRIPE_SIZE(conf))
+ clen = RAID5_STRIPE_SIZE(conf) - page_offset;
else
clen = len;
@@ -1270,17 +1344,17 @@
b_offset += bvl.bv_offset;
bio_page = bvl.bv_page;
if (frombio) {
- if (sh->raid_conf->skip_copy &&
+ if (conf->skip_copy &&
b_offset == 0 && page_offset == 0 &&
- clen == STRIPE_SIZE &&
+ clen == RAID5_STRIPE_SIZE(conf) &&
!no_skipcopy)
*page = bio_page;
else
- tx = async_memcpy(*page, bio_page, page_offset,
+ tx = async_memcpy(*page, bio_page, page_offset + poff,
b_offset, clen, &submit);
} else
tx = async_memcpy(bio_page, *page, b_offset,
- page_offset, clen, &submit);
+ page_offset + poff, clen, &submit);
}
/* chain the operations */
submit.depend_tx = tx;
@@ -1297,6 +1371,7 @@
{
struct stripe_head *sh = stripe_head_ref;
int i;
+ struct r5conf *conf = sh->raid_conf;
pr_debug("%s: stripe %llu\n", __func__,
(unsigned long long)sh->sector);
@@ -1317,8 +1392,8 @@
rbi = dev->read;
dev->read = NULL;
while (rbi && rbi->bi_iter.bi_sector <
- dev->sector + STRIPE_SECTORS) {
- rbi2 = r5_next_bio(rbi, dev->sector);
+ dev->sector + RAID5_STRIPE_SECTORS(conf)) {
+ rbi2 = r5_next_bio(conf, rbi, dev->sector);
bio_endio(rbi);
rbi = rbi2;
}
@@ -1335,6 +1410,7 @@
struct dma_async_tx_descriptor *tx = NULL;
struct async_submit_ctl submit;
int i;
+ struct r5conf *conf = sh->raid_conf;
BUG_ON(sh->batch_head);
pr_debug("%s: stripe %llu\n", __func__,
@@ -1349,10 +1425,11 @@
dev->toread = NULL;
spin_unlock_irq(&sh->stripe_lock);
while (rbi && rbi->bi_iter.bi_sector <
- dev->sector + STRIPE_SECTORS) {
+ dev->sector + RAID5_STRIPE_SECTORS(conf)) {
tx = async_copy_data(0, rbi, &dev->page,
+ dev->offset,
dev->sector, tx, sh, 0);
- rbi = r5_next_bio(rbi, dev->sector);
+ rbi = r5_next_bio(conf, rbi, dev->sector);
}
}
}
@@ -1394,22 +1471,25 @@
}
/* return a pointer to the address conversion region of the scribble buffer */
-static addr_conv_t *to_addr_conv(struct stripe_head *sh,
- struct raid5_percpu *percpu, int i)
+static struct page **to_addr_page(struct raid5_percpu *percpu, int i)
{
- void *addr;
-
- addr = flex_array_get(percpu->scribble, i);
- return addr + sizeof(struct page *) * (sh->disks + 2);
+ return percpu->scribble + i * percpu->scribble_obj_size;
}
/* return a pointer to the address conversion region of the scribble buffer */
-static struct page **to_addr_page(struct raid5_percpu *percpu, int i)
+static addr_conv_t *to_addr_conv(struct stripe_head *sh,
+ struct raid5_percpu *percpu, int i)
{
- void *addr;
+ return (void *) (to_addr_page(percpu, i) + sh->disks + 2);
+}
- addr = flex_array_get(percpu->scribble, i);
- return addr;
+/*
+ * Return a pointer to record offset address.
+ */
+static unsigned int *
+to_addr_offs(struct stripe_head *sh, struct raid5_percpu *percpu)
+{
+ return (unsigned int *) (to_addr_conv(sh, percpu, 0) + sh->disks + 2);
}
static struct dma_async_tx_descriptor *
@@ -1417,9 +1497,11 @@
{
int disks = sh->disks;
struct page **xor_srcs = to_addr_page(percpu, 0);
+ unsigned int *off_srcs = to_addr_offs(sh, percpu);
int target = sh->ops.target;
struct r5dev *tgt = &sh->dev[target];
struct page *xor_dest = tgt->page;
+ unsigned int off_dest = tgt->offset;
int count = 0;
struct dma_async_tx_descriptor *tx;
struct async_submit_ctl submit;
@@ -1431,24 +1513,30 @@
__func__, (unsigned long long)sh->sector, target);
BUG_ON(!test_bit(R5_Wantcompute, &tgt->flags));
- for (i = disks; i--; )
- if (i != target)
+ for (i = disks; i--; ) {
+ if (i != target) {
+ off_srcs[count] = sh->dev[i].offset;
xor_srcs[count++] = sh->dev[i].page;
+ }
+ }
atomic_inc(&sh->count);
init_async_submit(&submit, ASYNC_TX_FENCE|ASYNC_TX_XOR_ZERO_DST, NULL,
ops_complete_compute, sh, to_addr_conv(sh, percpu, 0));
if (unlikely(count == 1))
- tx = async_memcpy(xor_dest, xor_srcs[0], 0, 0, STRIPE_SIZE, &submit);
+ tx = async_memcpy(xor_dest, xor_srcs[0], off_dest, off_srcs[0],
+ RAID5_STRIPE_SIZE(sh->raid_conf), &submit);
else
- tx = async_xor(xor_dest, xor_srcs, 0, count, STRIPE_SIZE, &submit);
+ tx = async_xor_offs(xor_dest, off_dest, xor_srcs, off_srcs, count,
+ RAID5_STRIPE_SIZE(sh->raid_conf), &submit);
return tx;
}
/* set_syndrome_sources - populate source buffers for gen_syndrome
* @srcs - (struct page *) array of size sh->disks
+ * @offs - (unsigned int) array of offset for each page
* @sh - stripe_head to parse
*
* Populates srcs in proper layout order for the stripe and returns the
@@ -1457,6 +1545,7 @@
* is recorded in srcs[count+1]].
*/
static int set_syndrome_sources(struct page **srcs,
+ unsigned int *offs,
struct stripe_head *sh,
int srctype)
{
@@ -1487,6 +1576,12 @@
srcs[slot] = sh->dev[i].orig_page;
else
srcs[slot] = sh->dev[i].page;
+ /*
+ * For R5_InJournal, PAGE_SIZE must be 4KB and will
+ * not shared page. In that case, dev[i].offset
+ * is 0.
+ */
+ offs[slot] = sh->dev[i].offset;
}
i = raid6_next_disk(i, disks);
} while (i != d0_idx);
@@ -1499,12 +1594,14 @@
{
int disks = sh->disks;
struct page **blocks = to_addr_page(percpu, 0);
+ unsigned int *offs = to_addr_offs(sh, percpu);
int target;
int qd_idx = sh->qd_idx;
struct dma_async_tx_descriptor *tx;
struct async_submit_ctl submit;
struct r5dev *tgt;
struct page *dest;
+ unsigned int dest_off;
int i;
int count;
@@ -1523,30 +1620,34 @@
tgt = &sh->dev[target];
BUG_ON(!test_bit(R5_Wantcompute, &tgt->flags));
dest = tgt->page;
+ dest_off = tgt->offset;
atomic_inc(&sh->count);
if (target == qd_idx) {
- count = set_syndrome_sources(blocks, sh, SYNDROME_SRC_ALL);
+ count = set_syndrome_sources(blocks, offs, sh, SYNDROME_SRC_ALL);
blocks[count] = NULL; /* regenerating p is not necessary */
BUG_ON(blocks[count+1] != dest); /* q should already be set */
init_async_submit(&submit, ASYNC_TX_FENCE, NULL,
ops_complete_compute, sh,
to_addr_conv(sh, percpu, 0));
- tx = async_gen_syndrome(blocks, 0, count+2, STRIPE_SIZE, &submit);
+ tx = async_gen_syndrome(blocks, offs, count+2,
+ RAID5_STRIPE_SIZE(sh->raid_conf), &submit);
} else {
/* Compute any data- or p-drive using XOR */
count = 0;
for (i = disks; i-- ; ) {
if (i == target || i == qd_idx)
continue;
+ offs[count] = sh->dev[i].offset;
blocks[count++] = sh->dev[i].page;
}
init_async_submit(&submit, ASYNC_TX_FENCE|ASYNC_TX_XOR_ZERO_DST,
NULL, ops_complete_compute, sh,
to_addr_conv(sh, percpu, 0));
- tx = async_xor(dest, blocks, 0, count, STRIPE_SIZE, &submit);
+ tx = async_xor_offs(dest, dest_off, blocks, offs, count,
+ RAID5_STRIPE_SIZE(sh->raid_conf), &submit);
}
return tx;
@@ -1565,6 +1666,7 @@
struct r5dev *tgt2 = &sh->dev[target2];
struct dma_async_tx_descriptor *tx;
struct page **blocks = to_addr_page(percpu, 0);
+ unsigned int *offs = to_addr_offs(sh, percpu);
struct async_submit_ctl submit;
BUG_ON(sh->batch_head);
@@ -1577,13 +1679,16 @@
/* we need to open-code set_syndrome_sources to handle the
* slot number conversion for 'faila' and 'failb'
*/
- for (i = 0; i < disks ; i++)
+ for (i = 0; i < disks ; i++) {
+ offs[i] = 0;
blocks[i] = NULL;
+ }
count = 0;
i = d0_idx;
do {
int slot = raid6_idx_to_slot(i, sh, &count, syndrome_disks);
+ offs[slot] = sh->dev[i].offset;
blocks[slot] = sh->dev[i].page;
if (i == target)
@@ -1608,10 +1713,12 @@
init_async_submit(&submit, ASYNC_TX_FENCE, NULL,
ops_complete_compute, sh,
to_addr_conv(sh, percpu, 0));
- return async_gen_syndrome(blocks, 0, syndrome_disks+2,
- STRIPE_SIZE, &submit);
+ return async_gen_syndrome(blocks, offs, syndrome_disks+2,
+ RAID5_STRIPE_SIZE(sh->raid_conf),
+ &submit);
} else {
struct page *dest;
+ unsigned int dest_off;
int data_target;
int qd_idx = sh->qd_idx;
@@ -1625,22 +1732,26 @@
for (i = disks; i-- ; ) {
if (i == data_target || i == qd_idx)
continue;
+ offs[count] = sh->dev[i].offset;
blocks[count++] = sh->dev[i].page;
}
dest = sh->dev[data_target].page;
+ dest_off = sh->dev[data_target].offset;
init_async_submit(&submit,
ASYNC_TX_FENCE|ASYNC_TX_XOR_ZERO_DST,
NULL, NULL, NULL,
to_addr_conv(sh, percpu, 0));
- tx = async_xor(dest, blocks, 0, count, STRIPE_SIZE,
+ tx = async_xor_offs(dest, dest_off, blocks, offs, count,
+ RAID5_STRIPE_SIZE(sh->raid_conf),
&submit);
- count = set_syndrome_sources(blocks, sh, SYNDROME_SRC_ALL);
+ count = set_syndrome_sources(blocks, offs, sh, SYNDROME_SRC_ALL);
init_async_submit(&submit, ASYNC_TX_FENCE, tx,
ops_complete_compute, sh,
to_addr_conv(sh, percpu, 0));
- return async_gen_syndrome(blocks, 0, count+2,
- STRIPE_SIZE, &submit);
+ return async_gen_syndrome(blocks, offs, count+2,
+ RAID5_STRIPE_SIZE(sh->raid_conf),
+ &submit);
}
} else {
init_async_submit(&submit, ASYNC_TX_FENCE, NULL,
@@ -1649,13 +1760,15 @@
if (failb == syndrome_disks) {
/* We're missing D+P. */
return async_raid6_datap_recov(syndrome_disks+2,
- STRIPE_SIZE, faila,
- blocks, &submit);
+ RAID5_STRIPE_SIZE(sh->raid_conf),
+ faila,
+ blocks, offs, &submit);
} else {
/* We're missing D+D. */
return async_raid6_2data_recov(syndrome_disks+2,
- STRIPE_SIZE, faila, failb,
- blocks, &submit);
+ RAID5_STRIPE_SIZE(sh->raid_conf),
+ faila, failb,
+ blocks, offs, &submit);
}
}
}
@@ -1681,10 +1794,12 @@
{
int disks = sh->disks;
struct page **xor_srcs = to_addr_page(percpu, 0);
+ unsigned int *off_srcs = to_addr_offs(sh, percpu);
int count = 0, pd_idx = sh->pd_idx, i;
struct async_submit_ctl submit;
/* existing parity data subtracted */
+ unsigned int off_dest = off_srcs[count] = sh->dev[pd_idx].offset;
struct page *xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;
BUG_ON(sh->batch_head);
@@ -1694,15 +1809,23 @@
for (i = disks; i--; ) {
struct r5dev *dev = &sh->dev[i];
/* Only process blocks that are known to be uptodate */
- if (test_bit(R5_InJournal, &dev->flags))
+ if (test_bit(R5_InJournal, &dev->flags)) {
+ /*
+ * For this case, PAGE_SIZE must be equal to 4KB and
+ * page offset is zero.
+ */
+ off_srcs[count] = dev->offset;
xor_srcs[count++] = dev->orig_page;
- else if (test_bit(R5_Wantdrain, &dev->flags))
+ } else if (test_bit(R5_Wantdrain, &dev->flags)) {
+ off_srcs[count] = dev->offset;
xor_srcs[count++] = dev->page;
+ }
}
init_async_submit(&submit, ASYNC_TX_FENCE|ASYNC_TX_XOR_DROP_DST, tx,
ops_complete_prexor, sh, to_addr_conv(sh, percpu, 0));
- tx = async_xor(xor_dest, xor_srcs, 0, count, STRIPE_SIZE, &submit);
+ tx = async_xor_offs(xor_dest, off_dest, xor_srcs, off_srcs, count,
+ RAID5_STRIPE_SIZE(sh->raid_conf), &submit);
return tx;
}
@@ -1712,17 +1835,19 @@
struct dma_async_tx_descriptor *tx)
{
struct page **blocks = to_addr_page(percpu, 0);
+ unsigned int *offs = to_addr_offs(sh, percpu);
int count;
struct async_submit_ctl submit;
pr_debug("%s: stripe %llu\n", __func__,
(unsigned long long)sh->sector);
- count = set_syndrome_sources(blocks, sh, SYNDROME_SRC_WANT_DRAIN);
+ count = set_syndrome_sources(blocks, offs, sh, SYNDROME_SRC_WANT_DRAIN);
init_async_submit(&submit, ASYNC_TX_FENCE|ASYNC_TX_PQ_XOR_DST, tx,
ops_complete_prexor, sh, to_addr_conv(sh, percpu, 0));
- tx = async_gen_syndrome(blocks, 0, count+2, STRIPE_SIZE, &submit);
+ tx = async_gen_syndrome(blocks, offs, count+2,
+ RAID5_STRIPE_SIZE(sh->raid_conf), &submit);
return tx;
}
@@ -1763,7 +1888,7 @@
WARN_ON(dev->page != dev->orig_page);
while (wbi && wbi->bi_iter.bi_sector <
- dev->sector + STRIPE_SECTORS) {
+ dev->sector + RAID5_STRIPE_SECTORS(conf)) {
if (wbi->bi_opf & REQ_FUA)
set_bit(R5_WantFUA, &dev->flags);
if (wbi->bi_opf & REQ_SYNC)
@@ -1772,6 +1897,7 @@
set_bit(R5_Discard, &dev->flags);
else {
tx = async_copy_data(1, wbi, &dev->page,
+ dev->offset,
dev->sector, tx, sh,
r5c_is_writeback(conf->log));
if (dev->page != dev->orig_page &&
@@ -1781,7 +1907,7 @@
clear_bit(R5_OVERWRITE, &dev->flags);
}
}
- wbi = r5_next_bio(wbi, dev->sector);
+ wbi = r5_next_bio(conf, wbi, dev->sector);
}
if (head_sh->batch_head) {
@@ -1851,9 +1977,11 @@
{
int disks = sh->disks;
struct page **xor_srcs;
+ unsigned int *off_srcs;
struct async_submit_ctl submit;
int count, pd_idx = sh->pd_idx, i;
struct page *xor_dest;
+ unsigned int off_dest;
int prexor = 0;
unsigned long flags;
int j = 0;
@@ -1878,24 +2006,31 @@
again:
count = 0;
xor_srcs = to_addr_page(percpu, j);
+ off_srcs = to_addr_offs(sh, percpu);
/* check if prexor is active which means only process blocks
* that are part of a read-modify-write (written)
*/
if (head_sh->reconstruct_state == reconstruct_state_prexor_drain_run) {
prexor = 1;
+ off_dest = off_srcs[count] = sh->dev[pd_idx].offset;
xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;
for (i = disks; i--; ) {
struct r5dev *dev = &sh->dev[i];
if (head_sh->dev[i].written ||
- test_bit(R5_InJournal, &head_sh->dev[i].flags))
+ test_bit(R5_InJournal, &head_sh->dev[i].flags)) {
+ off_srcs[count] = dev->offset;
xor_srcs[count++] = dev->page;
+ }
}
} else {
xor_dest = sh->dev[pd_idx].page;
+ off_dest = sh->dev[pd_idx].offset;
for (i = disks; i--; ) {
struct r5dev *dev = &sh->dev[i];
- if (i != pd_idx)
+ if (i != pd_idx) {
+ off_srcs[count] = dev->offset;
xor_srcs[count++] = dev->page;
+ }
}
}
@@ -1921,9 +2056,11 @@
}
if (unlikely(count == 1))
- tx = async_memcpy(xor_dest, xor_srcs[0], 0, 0, STRIPE_SIZE, &submit);
+ tx = async_memcpy(xor_dest, xor_srcs[0], off_dest, off_srcs[0],
+ RAID5_STRIPE_SIZE(sh->raid_conf), &submit);
else
- tx = async_xor(xor_dest, xor_srcs, 0, count, STRIPE_SIZE, &submit);
+ tx = async_xor_offs(xor_dest, off_dest, xor_srcs, off_srcs, count,
+ RAID5_STRIPE_SIZE(sh->raid_conf), &submit);
if (!last_stripe) {
j++;
sh = list_first_entry(&sh->batch_list, struct stripe_head,
@@ -1938,6 +2075,7 @@
{
struct async_submit_ctl submit;
struct page **blocks;
+ unsigned int *offs;
int count, i, j = 0;
struct stripe_head *head_sh = sh;
int last_stripe;
@@ -1962,6 +2100,7 @@
again:
blocks = to_addr_page(percpu, j);
+ offs = to_addr_offs(sh, percpu);
if (sh->reconstruct_state == reconstruct_state_prexor_drain_run) {
synflags = SYNDROME_SRC_WRITTEN;
@@ -1971,7 +2110,7 @@
txflags = ASYNC_TX_ACK;
}
- count = set_syndrome_sources(blocks, sh, synflags);
+ count = set_syndrome_sources(blocks, offs, sh, synflags);
last_stripe = !head_sh->batch_head ||
list_first_entry(&sh->batch_list,
struct stripe_head, batch_list) == head_sh;
@@ -1983,7 +2122,8 @@
} else
init_async_submit(&submit, 0, tx, NULL, NULL,
to_addr_conv(sh, percpu, j));
- tx = async_gen_syndrome(blocks, 0, count+2, STRIPE_SIZE, &submit);
+ tx = async_gen_syndrome(blocks, offs, count+2,
+ RAID5_STRIPE_SIZE(sh->raid_conf), &submit);
if (!last_stripe) {
j++;
sh = list_first_entry(&sh->batch_list, struct stripe_head,
@@ -2010,7 +2150,9 @@
int pd_idx = sh->pd_idx;
int qd_idx = sh->qd_idx;
struct page *xor_dest;
+ unsigned int off_dest;
struct page **xor_srcs = to_addr_page(percpu, 0);
+ unsigned int *off_srcs = to_addr_offs(sh, percpu);
struct dma_async_tx_descriptor *tx;
struct async_submit_ctl submit;
int count;
@@ -2022,16 +2164,20 @@
BUG_ON(sh->batch_head);
count = 0;
xor_dest = sh->dev[pd_idx].page;
+ off_dest = sh->dev[pd_idx].offset;
+ off_srcs[count] = off_dest;
xor_srcs[count++] = xor_dest;
for (i = disks; i--; ) {
if (i == pd_idx || i == qd_idx)
continue;
+ off_srcs[count] = sh->dev[i].offset;
xor_srcs[count++] = sh->dev[i].page;
}
init_async_submit(&submit, 0, NULL, NULL, NULL,
to_addr_conv(sh, percpu, 0));
- tx = async_xor_val(xor_dest, xor_srcs, 0, count, STRIPE_SIZE,
+ tx = async_xor_val_offs(xor_dest, off_dest, xor_srcs, off_srcs, count,
+ RAID5_STRIPE_SIZE(sh->raid_conf),
&sh->ops.zero_sum_result, &submit);
atomic_inc(&sh->count);
@@ -2042,6 +2188,7 @@
static void ops_run_check_pq(struct stripe_head *sh, struct raid5_percpu *percpu, int checkp)
{
struct page **srcs = to_addr_page(percpu, 0);
+ unsigned int *offs = to_addr_offs(sh, percpu);
struct async_submit_ctl submit;
int count;
@@ -2049,15 +2196,16 @@
(unsigned long long)sh->sector, checkp);
BUG_ON(sh->batch_head);
- count = set_syndrome_sources(srcs, sh, SYNDROME_SRC_ALL);
+ count = set_syndrome_sources(srcs, offs, sh, SYNDROME_SRC_ALL);
if (!checkp)
srcs[count] = NULL;
atomic_inc(&sh->count);
init_async_submit(&submit, ASYNC_TX_ACK, NULL, ops_complete_check,
sh, to_addr_conv(sh, percpu, 0));
- async_syndrome_val(srcs, 0, count+2, STRIPE_SIZE,
- &sh->ops.zero_sum_result, percpu->spare_page, &submit);
+ async_syndrome_val(srcs, offs, count+2,
+ RAID5_STRIPE_SIZE(sh->raid_conf),
+ &sh->ops.zero_sum_result, percpu->spare_page, 0, &submit);
}
static void raid_run_ops(struct stripe_head *sh, unsigned long ops_request)
@@ -2134,6 +2282,9 @@
static void free_stripe(struct kmem_cache *sc, struct stripe_head *sh)
{
+#if PAGE_SIZE != DEFAULT_STRIPE_SIZE
+ kfree(sh->pages);
+#endif
if (sh->ppl_page)
__free_page(sh->ppl_page);
kmem_cache_free(sc, sh);
@@ -2167,9 +2318,15 @@
sh->ppl_page = alloc_page(gfp);
if (!sh->ppl_page) {
free_stripe(sc, sh);
- sh = NULL;
+ return NULL;
}
}
+#if PAGE_SIZE != DEFAULT_STRIPE_SIZE
+ if (init_stripe_shared_pages(sh, conf, disks)) {
+ free_stripe(sc, sh);
+ return NULL;
+ }
+#endif
}
return sh;
}
@@ -2226,10 +2383,13 @@
}
/**
- * scribble_len - return the required size of the scribble region
- * @num - total number of disks in the array
+ * scribble_alloc - allocate percpu scribble buffer for required size
+ * of the scribble region
+ * @percpu: from for_each_present_cpu() of the caller
+ * @num: total number of disks in the array
+ * @cnt: scribble objs count for required size of the scribble region
*
- * The size must be enough to contain:
+ * The scribble buffer size must be enough to contain:
* 1/ a struct page pointer for each device in the array +2
* 2/ room to convert each entry in (1) to its corresponding dma
* (dma_map_page()) or page (page_address()) address.
@@ -2238,21 +2398,29 @@
* calculate over all devices (not just the data blocks), using zeros in place
* of the P and Q blocks.
*/
-static struct flex_array *scribble_alloc(int num, int cnt, gfp_t flags)
+static int scribble_alloc(struct raid5_percpu *percpu,
+ int num, int cnt)
{
- struct flex_array *ret;
- size_t len;
+ size_t obj_size =
+ sizeof(struct page *) * (num + 2) +
+ sizeof(addr_conv_t) * (num + 2) +
+ sizeof(unsigned int) * (num + 2);
+ void *scribble;
- len = sizeof(struct page *) * (num+2) + sizeof(addr_conv_t) * (num+2);
- ret = flex_array_alloc(len, cnt, flags);
- if (!ret)
- return NULL;
- /* always prealloc all elements, so no locking is required */
- if (flex_array_prealloc(ret, 0, cnt, flags)) {
- flex_array_free(ret);
- return NULL;
- }
- return ret;
+ /*
+ * If here is in raid array suspend context, it is in memalloc noio
+ * context as well, there is no potential recursive memory reclaim
+ * I/Os with the GFP_KERNEL flag.
+ */
+ scribble = kvmalloc_array(cnt, obj_size, GFP_KERNEL);
+ if (!scribble)
+ return -ENOMEM;
+
+ kvfree(percpu->scribble);
+
+ percpu->scribble = scribble;
+ percpu->scribble_obj_size = obj_size;
+ return 0;
}
static int resize_chunks(struct r5conf *conf, int new_disks, int new_sectors)
@@ -2270,23 +2438,17 @@
return 0;
mddev_suspend(conf->mddev);
get_online_cpus();
+
for_each_present_cpu(cpu) {
struct raid5_percpu *percpu;
- struct flex_array *scribble;
percpu = per_cpu_ptr(conf->percpu, cpu);
- scribble = scribble_alloc(new_disks,
- new_sectors / STRIPE_SECTORS,
- GFP_NOIO);
-
- if (scribble) {
- flex_array_free(percpu->scribble);
- percpu->scribble = scribble;
- } else {
- err = -ENOMEM;
+ err = scribble_alloc(percpu, new_disks,
+ new_sectors / RAID5_STRIPE_SECTORS(conf));
+ if (err)
break;
- }
}
+
put_online_cpus();
mddev_resume(conf->mddev);
if (!err) {
@@ -2374,9 +2536,16 @@
osh = get_free_stripe(conf, hash);
unlock_device_hash_lock(conf, hash);
+#if PAGE_SIZE != DEFAULT_STRIPE_SIZE
+ for (i = 0; i < osh->nr_pages; i++) {
+ nsh->pages[i] = osh->pages[i];
+ osh->pages[i] = NULL;
+ }
+#endif
for(i=0; i<conf->pool_size; i++) {
nsh->dev[i].page = osh->dev[i].page;
nsh->dev[i].orig_page = osh->dev[i].page;
+ nsh->dev[i].offset = osh->dev[i].offset;
}
nsh->hash_lock_index = hash;
free_stripe(conf->slab_cache, osh);
@@ -2425,14 +2594,33 @@
nsh = list_entry(newstripes.next, struct stripe_head, lru);
list_del_init(&nsh->lru);
+#if PAGE_SIZE != DEFAULT_STRIPE_SIZE
+ for (i = 0; i < nsh->nr_pages; i++) {
+ if (nsh->pages[i])
+ continue;
+ nsh->pages[i] = alloc_page(GFP_NOIO);
+ if (!nsh->pages[i])
+ err = -ENOMEM;
+ }
+
+ for (i = conf->raid_disks; i < newsize; i++) {
+ if (nsh->dev[i].page)
+ continue;
+ nsh->dev[i].page = raid5_get_dev_page(nsh, i);
+ nsh->dev[i].orig_page = nsh->dev[i].page;
+ nsh->dev[i].offset = raid5_get_page_offset(nsh, i);
+ }
+#else
for (i=conf->raid_disks; i < newsize; i++)
if (nsh->dev[i].page == NULL) {
struct page *p = alloc_page(GFP_NOIO);
nsh->dev[i].page = p;
nsh->dev[i].orig_page = p;
+ nsh->dev[i].offset = 0;
if (!p)
err = -ENOMEM;
}
+#endif
raid5_release_stripe(nsh);
}
/* critical section pass, GFP_NOIO no longer needed */
@@ -2516,10 +2704,10 @@
*/
pr_info_ratelimited(
"md/raid:%s: read error corrected (%lu sectors at %llu on %s)\n",
- mdname(conf->mddev), STRIPE_SECTORS,
+ mdname(conf->mddev), RAID5_STRIPE_SECTORS(conf),
(unsigned long long)s,
bdevname(rdev->bdev, b));
- atomic_add(STRIPE_SECTORS, &rdev->corrected_errors);
+ atomic_add(RAID5_STRIPE_SECTORS(conf), &rdev->corrected_errors);
clear_bit(R5_ReadError, &sh->dev[i].flags);
clear_bit(R5_ReWrite, &sh->dev[i].flags);
} else if (test_bit(R5_ReadNoMerge, &sh->dev[i].flags))
@@ -2564,10 +2752,16 @@
(unsigned long long)s,
bdn);
} else if (atomic_read(&rdev->read_errors)
- > conf->max_nr_stripes)
- pr_warn("md/raid:%s: Too many read errors, failing device %s.\n",
- mdname(conf->mddev), bdn);
- else
+ > conf->max_nr_stripes) {
+ if (!test_bit(Faulty, &rdev->flags)) {
+ pr_warn("md/raid:%s: %d read_errors > %d stripes\n",
+ mdname(conf->mddev),
+ atomic_read(&rdev->read_errors),
+ conf->max_nr_stripes);
+ pr_warn("md/raid:%s: Too many read errors, failing device %s.\n",
+ mdname(conf->mddev), bdn);
+ }
+ } else
retry = 1;
if (set_bad && test_bit(In_sync, &rdev->flags)
&& !test_bit(R5_ReadNoMerge, &sh->dev[i].flags))
@@ -2586,7 +2780,7 @@
if (!(set_bad
&& test_bit(In_sync, &rdev->flags)
&& rdev_set_badblocks(
- rdev, sh->sector, STRIPE_SECTORS, 0)))
+ rdev, sh->sector, RAID5_STRIPE_SECTORS(conf), 0)))
md_error(conf->mddev, rdev);
}
}
@@ -2602,7 +2796,7 @@
struct stripe_head *sh = bi->bi_private;
struct r5conf *conf = sh->raid_conf;
int disks = sh->disks, i;
- struct md_rdev *uninitialized_var(rdev);
+ struct md_rdev *rdev;
sector_t first_bad;
int bad_sectors;
int replacement = 0;
@@ -2638,7 +2832,7 @@
if (bi->bi_status)
md_error(conf->mddev, rdev);
else if (is_badblock(rdev, sh->sector,
- STRIPE_SECTORS,
+ RAID5_STRIPE_SECTORS(conf),
&first_bad, &bad_sectors))
set_bit(R5_MadeGoodRepl, &sh->dev[i].flags);
} else {
@@ -2650,7 +2844,7 @@
set_bit(MD_RECOVERY_NEEDED,
&rdev->mddev->recovery);
} else if (is_badblock(rdev, sh->sector,
- STRIPE_SECTORS,
+ RAID5_STRIPE_SECTORS(conf),
&first_bad, &bad_sectors)) {
set_bit(R5_MadeGood, &sh->dev[i].flags);
if (test_bit(R5_ReadError, &sh->dev[i].flags))
@@ -2670,10 +2864,10 @@
if (!test_and_clear_bit(R5_DOUBLE_LOCKED, &sh->dev[i].flags))
clear_bit(R5_LOCKED, &sh->dev[i].flags);
set_bit(STRIPE_HANDLE, &sh->state);
- raid5_release_stripe(sh);
if (sh->batch_head && sh != sh->batch_head)
raid5_release_stripe(sh->batch_head);
+ raid5_release_stripe(sh);
}
static void raid5_error(struct mddev *mddev, struct md_rdev *rdev)
@@ -2683,22 +2877,31 @@
unsigned long flags;
pr_debug("raid456: error called\n");
+ pr_crit("md/raid:%s: Disk failure on %s, disabling device.\n",
+ mdname(mddev), bdevname(rdev->bdev, b));
+
spin_lock_irqsave(&conf->device_lock, flags);
set_bit(Faulty, &rdev->flags);
clear_bit(In_sync, &rdev->flags);
mddev->degraded = raid5_calc_degraded(conf);
+
+ if (has_failed(conf)) {
+ set_bit(MD_BROKEN, &conf->mddev->flags);
+ conf->recovery_disabled = mddev->recovery_disabled;
+
+ pr_crit("md/raid:%s: Cannot continue operation (%d/%d failed).\n",
+ mdname(mddev), mddev->degraded, conf->raid_disks);
+ } else {
+ pr_crit("md/raid:%s: Operation continuing on %d devices.\n",
+ mdname(mddev), conf->raid_disks - mddev->degraded);
+ }
+
spin_unlock_irqrestore(&conf->device_lock, flags);
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
set_bit(Blocked, &rdev->flags);
set_mask_bits(&mddev->sb_flags, 0,
BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_PENDING));
- pr_crit("md/raid:%s: Disk failure on %s, disabling device.\n"
- "md/raid:%s: Operation continuing on %d devices.\n",
- mdname(mddev),
- bdevname(rdev->bdev, b),
- mdname(mddev),
- conf->raid_disks - mddev->degraded);
r5c_update_on_rdev_error(mddev, rdev);
}
@@ -3272,13 +3475,13 @@
/* check if page is covered */
sector_t sector = sh->dev[dd_idx].sector;
for (bi=sh->dev[dd_idx].towrite;
- sector < sh->dev[dd_idx].sector + STRIPE_SECTORS &&
+ sector < sh->dev[dd_idx].sector + RAID5_STRIPE_SECTORS(conf) &&
bi && bi->bi_iter.bi_sector <= sector;
- bi = r5_next_bio(bi, sh->dev[dd_idx].sector)) {
+ bi = r5_next_bio(conf, bi, sh->dev[dd_idx].sector)) {
if (bio_end_sector(bi) >= sector)
sector = bio_end_sector(bi);
}
- if (sector >= sh->dev[dd_idx].sector + STRIPE_SECTORS)
+ if (sector >= sh->dev[dd_idx].sector + RAID5_STRIPE_SECTORS(conf))
if (!test_and_set_bit(R5_OVERWRITE, &sh->dev[dd_idx].flags))
sh->overwrite_disks++;
}
@@ -3303,7 +3506,7 @@
set_bit(STRIPE_BITMAP_PENDING, &sh->state);
spin_unlock_irq(&sh->stripe_lock);
md_bitmap_startwrite(conf->mddev->bitmap, sh->sector,
- STRIPE_SECTORS, 0);
+ RAID5_STRIPE_SECTORS(conf), 0);
spin_lock_irq(&sh->stripe_lock);
clear_bit(STRIPE_BITMAP_PENDING, &sh->state);
if (!sh->batch_head) {
@@ -3365,7 +3568,7 @@
if (!rdev_set_badblocks(
rdev,
sh->sector,
- STRIPE_SECTORS, 0))
+ RAID5_STRIPE_SECTORS(conf), 0))
md_error(conf->mddev, rdev);
rdev_dec_pending(rdev, conf->mddev);
}
@@ -3385,8 +3588,8 @@
wake_up(&conf->wait_for_overlap);
while (bi && bi->bi_iter.bi_sector <
- sh->dev[i].sector + STRIPE_SECTORS) {
- struct bio *nextbi = r5_next_bio(bi, sh->dev[i].sector);
+ sh->dev[i].sector + RAID5_STRIPE_SECTORS(conf)) {
+ struct bio *nextbi = r5_next_bio(conf, bi, sh->dev[i].sector);
md_write_end(conf->mddev);
bio_io_error(bi);
@@ -3394,7 +3597,7 @@
}
if (bitmap_end)
md_bitmap_endwrite(conf->mddev->bitmap, sh->sector,
- STRIPE_SECTORS, 0, 0);
+ RAID5_STRIPE_SECTORS(conf), 0, 0);
bitmap_end = 0;
/* and fail all 'written' */
bi = sh->dev[i].written;
@@ -3406,8 +3609,8 @@
if (bi) bitmap_end = 1;
while (bi && bi->bi_iter.bi_sector <
- sh->dev[i].sector + STRIPE_SECTORS) {
- struct bio *bi2 = r5_next_bio(bi, sh->dev[i].sector);
+ sh->dev[i].sector + RAID5_STRIPE_SECTORS(conf)) {
+ struct bio *bi2 = r5_next_bio(conf, bi, sh->dev[i].sector);
md_write_end(conf->mddev);
bio_io_error(bi);
@@ -3430,9 +3633,9 @@
if (bi)
s->to_read--;
while (bi && bi->bi_iter.bi_sector <
- sh->dev[i].sector + STRIPE_SECTORS) {
+ sh->dev[i].sector + RAID5_STRIPE_SECTORS(conf)) {
struct bio *nextbi =
- r5_next_bio(bi, sh->dev[i].sector);
+ r5_next_bio(conf, bi, sh->dev[i].sector);
bio_io_error(bi);
bi = nextbi;
@@ -3440,7 +3643,7 @@
}
if (bitmap_end)
md_bitmap_endwrite(conf->mddev->bitmap, sh->sector,
- STRIPE_SECTORS, 0, 0);
+ RAID5_STRIPE_SECTORS(conf), 0, 0);
/* If we were in the middle of a write the parity block might
* still be locked - so just clear all R5_LOCKED flags
*/
@@ -3485,14 +3688,14 @@
&& !test_bit(Faulty, &rdev->flags)
&& !test_bit(In_sync, &rdev->flags)
&& !rdev_set_badblocks(rdev, sh->sector,
- STRIPE_SECTORS, 0))
+ RAID5_STRIPE_SECTORS(conf), 0))
abort = 1;
rdev = rcu_dereference(conf->disks[i].replacement);
if (rdev
&& !test_bit(Faulty, &rdev->flags)
&& !test_bit(In_sync, &rdev->flags)
&& !rdev_set_badblocks(rdev, sh->sector,
- STRIPE_SECTORS, 0))
+ RAID5_STRIPE_SECTORS(conf), 0))
abort = 1;
}
rcu_read_unlock();
@@ -3500,7 +3703,7 @@
conf->recovery_disabled =
conf->mddev->recovery_disabled;
}
- md_done_sync(conf->mddev, STRIPE_SECTORS, !abort);
+ md_done_sync(conf->mddev, RAID5_STRIPE_SECTORS(conf), !abort);
}
static int want_replace(struct stripe_head *sh, int disk_idx)
@@ -3527,6 +3730,7 @@
struct r5dev *fdev[2] = { &sh->dev[s->failed_num[0]],
&sh->dev[s->failed_num[1]] };
int i;
+ bool force_rcw = (sh->raid_conf->rmw_level == PARITY_DISABLE_RMW);
if (test_bit(R5_LOCKED, &dev->flags) ||
@@ -3585,18 +3789,27 @@
* devices must be read.
*/
return 1;
+
+ if (s->failed >= 2 &&
+ (fdev[i]->towrite ||
+ s->failed_num[i] == sh->pd_idx ||
+ s->failed_num[i] == sh->qd_idx) &&
+ !test_bit(R5_UPTODATE, &fdev[i]->flags))
+ /* In max degraded raid6, If the failed disk is P, Q,
+ * or we want to read the failed disk, we need to do
+ * reconstruct-write.
+ */
+ force_rcw = true;
}
- /* If we are forced to do a reconstruct-write, either because
- * the current RAID6 implementation only supports that, or
- * because parity cannot be trusted and we are currently
- * recovering it, there is extra need to be careful.
+ /* If we are forced to do a reconstruct-write, because parity
+ * cannot be trusted and we are currently recovering it, there
+ * is extra need to be careful.
* If one of the devices that we would need to read, because
* it is not being overwritten (and maybe not written at all)
* is missing/faulty, then we need to read everything we can.
*/
- if (sh->raid_conf->level != 6 &&
- sh->raid_conf->rmw_level != PARITY_DISABLE_RMW &&
+ if (!force_rcw &&
sh->sector < sh->raid_conf->mddev->recovery_cp)
/* reconstruct-write isn't being forced */
return 0;
@@ -3700,7 +3913,7 @@
return 0;
}
-/**
+/*
* handle_stripe_fill - read or compute data to satisfy pending requests.
*/
static void handle_stripe_fill(struct stripe_head *sh,
@@ -3723,7 +3936,7 @@
* back cache (prexor with orig_page, and then xor with
* page) in the read path
*/
- if (s->injournal && s->failed) {
+ if (s->to_read && s->injournal && s->failed) {
if (test_bit(STRIPE_R5C_CACHING, &sh->state))
r5c_make_stripe_write_out(sh);
goto out;
@@ -3775,14 +3988,14 @@
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;
}
md_bitmap_endwrite(conf->mddev->bitmap, sh->sector,
- STRIPE_SECTORS,
+ RAID5_STRIPE_SECTORS(conf),
!test_bit(STRIPE_DEGRADED, &sh->state),
0);
if (head_sh->batch_head) {
@@ -3966,10 +4179,8 @@
set_bit(R5_LOCKED, &dev->flags);
set_bit(R5_Wantread, &dev->flags);
s->locked++;
- } else {
+ } else
set_bit(STRIPE_DELAYED, &sh->state);
- set_bit(STRIPE_HANDLE, &sh->state);
- }
}
}
}
@@ -3994,10 +4205,8 @@
set_bit(R5_Wantread, &dev->flags);
s->locked++;
qread++;
- } else {
+ } else
set_bit(STRIPE_DELAYED, &sh->state);
- set_bit(STRIPE_HANDLE, &sh->state);
- }
}
}
if (rcw && conf->mddev->queue)
@@ -4047,7 +4256,7 @@
break;
}
dev = &sh->dev[s->failed_num[0]];
- /* fall through */
+ fallthrough;
case check_state_compute_result:
sh->check_state = check_state_idle;
if (!dev)
@@ -4089,7 +4298,7 @@
*/
set_bit(STRIPE_INSYNC, &sh->state);
else {
- atomic64_add(STRIPE_SECTORS, &conf->mddev->resync_mismatches);
+ atomic64_add(RAID5_STRIPE_SECTORS(conf), &conf->mddev->resync_mismatches);
if (test_bit(MD_RECOVERY_CHECK, &conf->mddev->recovery)) {
/* don't try to repair!! */
set_bit(STRIPE_INSYNC, &sh->state);
@@ -4097,7 +4306,7 @@
"%llu-%llu\n", mdname(conf->mddev),
(unsigned long long) sh->sector,
(unsigned long long) sh->sector +
- STRIPE_SECTORS);
+ RAID5_STRIPE_SECTORS(conf));
} else {
sh->check_state = check_state_compute_run;
set_bit(STRIPE_COMPUTE_RUN, &sh->state);
@@ -4178,7 +4387,7 @@
/* we have 2-disk failure */
BUG_ON(s->failed != 2);
- /* fall through */
+ fallthrough;
case check_state_compute_result:
sh->check_state = check_state_idle;
@@ -4254,7 +4463,7 @@
*/
}
} else {
- atomic64_add(STRIPE_SECTORS, &conf->mddev->resync_mismatches);
+ atomic64_add(RAID5_STRIPE_SECTORS(conf), &conf->mddev->resync_mismatches);
if (test_bit(MD_RECOVERY_CHECK, &conf->mddev->recovery)) {
/* don't try to repair!! */
set_bit(STRIPE_INSYNC, &sh->state);
@@ -4262,7 +4471,7 @@
"%llu-%llu\n", mdname(conf->mddev),
(unsigned long long) sh->sector,
(unsigned long long) sh->sector +
- STRIPE_SECTORS);
+ RAID5_STRIPE_SECTORS(conf));
} else {
int *target = &sh->ops.target;
@@ -4333,7 +4542,8 @@
/* place all the copies on one channel */
init_async_submit(&submit, 0, tx, NULL, NULL, NULL);
tx = async_memcpy(sh2->dev[dd_idx].page,
- sh->dev[i].page, 0, 0, STRIPE_SIZE,
+ sh->dev[i].page, sh2->dev[dd_idx].offset,
+ sh->dev[i].offset, RAID5_STRIPE_SIZE(conf),
&submit);
set_bit(R5_Expanded, &sh2->dev[dd_idx].flags);
@@ -4432,8 +4642,8 @@
*/
rdev = rcu_dereference(conf->disks[i].replacement);
if (rdev && !test_bit(Faulty, &rdev->flags) &&
- rdev->recovery_offset >= sh->sector + STRIPE_SECTORS &&
- !is_badblock(rdev, sh->sector, STRIPE_SECTORS,
+ rdev->recovery_offset >= sh->sector + RAID5_STRIPE_SECTORS(conf) &&
+ !is_badblock(rdev, sh->sector, RAID5_STRIPE_SECTORS(conf),
&first_bad, &bad_sectors))
set_bit(R5_ReadRepl, &dev->flags);
else {
@@ -4447,7 +4657,7 @@
if (rdev && test_bit(Faulty, &rdev->flags))
rdev = NULL;
if (rdev) {
- is_bad = is_badblock(rdev, sh->sector, STRIPE_SECTORS,
+ is_bad = is_badblock(rdev, sh->sector, RAID5_STRIPE_SECTORS(conf),
&first_bad, &bad_sectors);
if (s->blocked_rdev == NULL
&& (test_bit(Blocked, &rdev->flags)
@@ -4474,7 +4684,7 @@
}
} else if (test_bit(In_sync, &rdev->flags))
set_bit(R5_Insync, &dev->flags);
- else if (sh->sector + STRIPE_SECTORS <= rdev->recovery_offset)
+ else if (sh->sector + RAID5_STRIPE_SECTORS(conf) <= rdev->recovery_offset)
/* in sync if before recovery_offset */
set_bit(R5_Insync, &dev->flags);
else if (test_bit(R5_UPTODATE, &dev->flags) &&
@@ -4563,12 +4773,12 @@
rcu_read_unlock();
}
+/*
+ * Return '1' if this is a member of batch, or '0' if it is a lone stripe or
+ * a head which can now be handled.
+ */
static int clear_batch_ready(struct stripe_head *sh)
{
- /* Return '1' if this is a member of batch, or
- * '0' if it is a lone stripe or a head which can now be
- * handled.
- */
struct stripe_head *tmp;
if (!test_and_clear_bit(STRIPE_BATCH_READY, &sh->state))
return (sh->batch_head && sh->batch_head != sh);
@@ -4618,7 +4828,6 @@
(1 << STRIPE_FULL_WRITE) |
(1 << STRIPE_BIOFILL_RUN) |
(1 << STRIPE_COMPUTE_RUN) |
- (1 << STRIPE_OPS_REQ_PENDING) |
(1 << STRIPE_DISCARD) |
(1 << STRIPE_BATCH_READY) |
(1 << STRIPE_BATCH_ERR) |
@@ -4673,15 +4882,20 @@
struct r5dev *pdev, *qdev;
clear_bit(STRIPE_HANDLE, &sh->state);
+
+ /*
+ * handle_stripe should not continue handle the batched stripe, only
+ * the head of batch list or lone stripe can continue. Otherwise we
+ * could see break_stripe_batch_list warns about the STRIPE_ACTIVE
+ * is set for the batched stripe.
+ */
+ if (clear_batch_ready(sh))
+ return;
+
if (test_and_set_bit_lock(STRIPE_ACTIVE, &sh->state)) {
/* already being handled, ensure it gets handled
* again when current action finishes */
set_bit(STRIPE_HANDLE, &sh->state);
- return;
- }
-
- if (clear_batch_ready(sh) ) {
- clear_bit_unlock(STRIPE_ACTIVE, &sh->state);
return;
}
@@ -4918,7 +5132,7 @@
if ((s.syncing || s.replacing) && s.locked == 0 &&
!test_bit(STRIPE_COMPUTE_RUN, &sh->state) &&
test_bit(STRIPE_INSYNC, &sh->state)) {
- md_done_sync(conf->mddev, STRIPE_SECTORS, 1);
+ md_done_sync(conf->mddev, RAID5_STRIPE_SECTORS(conf), 1);
clear_bit(STRIPE_SYNCING, &sh->state);
if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))
wake_up(&conf->wait_for_overlap);
@@ -4937,14 +5151,11 @@
if (!test_bit(R5_ReWrite, &dev->flags)) {
set_bit(R5_Wantwrite, &dev->flags);
set_bit(R5_ReWrite, &dev->flags);
- set_bit(R5_LOCKED, &dev->flags);
- s.locked++;
- } else {
+ } else
/* let's read it back */
set_bit(R5_Wantread, &dev->flags);
- set_bit(R5_LOCKED, &dev->flags);
- s.locked++;
- }
+ set_bit(R5_LOCKED, &dev->flags);
+ s.locked++;
}
}
@@ -4986,7 +5197,7 @@
clear_bit(STRIPE_EXPAND_READY, &sh->state);
atomic_dec(&conf->reshape_stripes);
wake_up(&conf->wait_for_overlap);
- md_done_sync(conf->mddev, STRIPE_SECTORS, 1);
+ md_done_sync(conf->mddev, RAID5_STRIPE_SECTORS(conf), 1);
}
if (s.expanding && s.locked == 0 &&
@@ -5016,14 +5227,14 @@
/* We own a safe reference to the rdev */
rdev = conf->disks[i].rdev;
if (!rdev_set_badblocks(rdev, sh->sector,
- STRIPE_SECTORS, 0))
+ RAID5_STRIPE_SECTORS(conf), 0))
md_error(conf->mddev, rdev);
rdev_dec_pending(rdev, conf->mddev);
}
if (test_and_clear_bit(R5_MadeGood, &dev->flags)) {
rdev = conf->disks[i].rdev;
rdev_clear_badblocks(rdev, sh->sector,
- STRIPE_SECTORS, 0);
+ RAID5_STRIPE_SECTORS(conf), 0);
rdev_dec_pending(rdev, conf->mddev);
}
if (test_and_clear_bit(R5_MadeGoodRepl, &dev->flags)) {
@@ -5032,7 +5243,7 @@
/* rdev have been moved down */
rdev = conf->disks[i].rdev;
rdev_clear_badblocks(rdev, sh->sector,
- STRIPE_SECTORS, 0);
+ RAID5_STRIPE_SECTORS(conf), 0);
rdev_dec_pending(rdev, conf->mddev);
}
}
@@ -5088,28 +5299,6 @@
hash = sh->hash_lock_index;
__release_stripe(conf, sh, &temp_inactive_list[hash]);
}
-}
-
-static int raid5_congested(struct mddev *mddev, int bits)
-{
- struct r5conf *conf = mddev->private;
-
- /* No difference between reads and writes. Just check
- * how busy the stripe_cache is
- */
-
- if (test_bit(R5_INACTIVE_BLOCKED, &conf->cache_state))
- return 1;
-
- /* Also checks whether there is pressure on r5cache log space */
- if (test_bit(R5C_LOG_TIGHT, &conf->cache_state))
- return 1;
- if (conf->quiesce)
- return 1;
- if (atomic_read(&conf->empty_inactive_list_nr))
- return 1;
-
- return 0;
}
static int in_chunk_boundary(struct mddev *mddev, struct bio *bio)
@@ -5257,7 +5446,6 @@
rcu_read_unlock();
raid_bio->bi_next = (void*)rdev;
bio_set_dev(align_bi, rdev->bdev);
- bio_clear_flag(align_bi, BIO_SEG_VALID);
if (is_badblock(rdev, align_bi->bi_iter.bi_sector,
bio_sectors(align_bi),
@@ -5281,7 +5469,7 @@
trace_block_bio_remap(align_bi->bi_disk->queue,
align_bi, disk_devt(mddev->gendisk),
raid_bio->bi_iter.bi_sector);
- generic_make_request(align_bi);
+ submit_bio_noacct(align_bi);
return 1;
} else {
rcu_read_unlock();
@@ -5301,7 +5489,7 @@
struct r5conf *conf = mddev->private;
split = bio_split(raid_bio, sectors, GFP_NOIO, &conf->bio_split);
bio_chain(split, raid_bio);
- generic_make_request(raid_bio);
+ submit_bio_noacct(raid_bio);
raid_bio = split;
}
@@ -5497,8 +5685,8 @@
/* Skip discard while reshape is happening */
return;
- logical_sector = bi->bi_iter.bi_sector & ~((sector_t)STRIPE_SECTORS-1);
- last_sector = bi->bi_iter.bi_sector + (bi->bi_iter.bi_size>>9);
+ logical_sector = bi->bi_iter.bi_sector & ~((sector_t)RAID5_STRIPE_SECTORS(conf)-1);
+ last_sector = bio_end_sector(bi);
bi->bi_next = NULL;
@@ -5512,7 +5700,7 @@
last_sector *= conf->chunk_sectors;
for (; logical_sector < last_sector;
- logical_sector += STRIPE_SECTORS) {
+ logical_sector += RAID5_STRIPE_SECTORS(conf)) {
DEFINE_WAIT(w);
int d;
again:
@@ -5557,7 +5745,7 @@
d++)
md_bitmap_startwrite(mddev->bitmap,
sh->sector,
- STRIPE_SECTORS,
+ RAID5_STRIPE_SECTORS(conf),
0);
sh->bm_seq = conf->seq_flush + 1;
set_bit(STRIPE_BIT_DELAY, &sh->state);
@@ -5622,12 +5810,12 @@
return true;
}
- logical_sector = bi->bi_iter.bi_sector & ~((sector_t)STRIPE_SECTORS-1);
+ logical_sector = bi->bi_iter.bi_sector & ~((sector_t)RAID5_STRIPE_SECTORS(conf)-1);
last_sector = bio_end_sector(bi);
bi->bi_next = NULL;
prepare_to_wait(&conf->wait_for_overlap, &w, TASK_UNINTERRUPTIBLE);
- for (;logical_sector < last_sector; logical_sector += STRIPE_SECTORS) {
+ for (; logical_sector < last_sector; logical_sector += RAID5_STRIPE_SECTORS(conf)) {
int previous;
int seq;
@@ -5725,8 +5913,7 @@
do_flush = false;
}
- if (!sh->batch_head || sh == sh->batch_head)
- set_bit(STRIPE_HANDLE, &sh->state);
+ set_bit(STRIPE_HANDLE, &sh->state);
clear_bit(STRIPE_DELAYED, &sh->state);
if ((!sh->batch_head || sh == sh->batch_head) &&
(bi->bi_opf & REQ_SYNC) &&
@@ -5791,7 +5978,7 @@
sector_div(sector_nr, new_data_disks);
if (sector_nr) {
mddev->curr_resync_completed = sector_nr;
- sysfs_notify(&mddev->kobj, NULL, "sync_completed");
+ sysfs_notify_dirent_safe(mddev->sysfs_completed);
*skipped = 1;
retn = sector_nr;
goto finish;
@@ -5905,11 +6092,11 @@
conf->reshape_safe = mddev->reshape_position;
spin_unlock_irq(&conf->device_lock);
wake_up(&conf->wait_for_overlap);
- sysfs_notify(&mddev->kobj, NULL, "sync_completed");
+ sysfs_notify_dirent_safe(mddev->sysfs_completed);
}
INIT_LIST_HEAD(&stripes);
- for (i = 0; i < reshape_sectors; i += STRIPE_SECTORS) {
+ for (i = 0; i < reshape_sectors; i += RAID5_STRIPE_SECTORS(conf)) {
int j;
int skipped_disk = 0;
sh = raid5_get_active_stripe(conf, stripe_addr+i, 0, 0, 1);
@@ -5930,7 +6117,7 @@
skipped_disk = 1;
continue;
}
- memset(page_address(sh->dev[j].page), 0, STRIPE_SIZE);
+ memset(page_address(sh->dev[j].page), 0, RAID5_STRIPE_SIZE(conf));
set_bit(R5_Expanded, &sh->dev[j].flags);
set_bit(R5_UPTODATE, &sh->dev[j].flags);
}
@@ -5965,7 +6152,7 @@
set_bit(STRIPE_EXPAND_SOURCE, &sh->state);
set_bit(STRIPE_HANDLE, &sh->state);
raid5_release_stripe(sh);
- first_sector += STRIPE_SECTORS;
+ first_sector += RAID5_STRIPE_SECTORS(conf);
}
/* Now that the sources are clearly marked, we can release
* the destination stripes
@@ -6012,7 +6199,7 @@
conf->reshape_safe = mddev->reshape_position;
spin_unlock_irq(&conf->device_lock);
wake_up(&conf->wait_for_overlap);
- sysfs_notify(&mddev->kobj, NULL, "sync_completed");
+ sysfs_notify_dirent_safe(mddev->sysfs_completed);
}
ret:
return retn;
@@ -6071,11 +6258,12 @@
if (!test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) &&
!conf->fullsync &&
!md_bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
- sync_blocks >= STRIPE_SECTORS) {
+ sync_blocks >= RAID5_STRIPE_SECTORS(conf)) {
/* we can skip this block, and probably more */
- sync_blocks /= STRIPE_SECTORS;
+ do_div(sync_blocks, RAID5_STRIPE_SECTORS(conf));
*skipped = 1;
- return sync_blocks * STRIPE_SECTORS; /* keep things rounded to whole stripes */
+ /* keep things rounded to whole stripes */
+ return sync_blocks * RAID5_STRIPE_SECTORS(conf);
}
md_bitmap_cond_end_sync(mddev->bitmap, sector_nr, false);
@@ -6108,7 +6296,7 @@
raid5_release_stripe(sh);
- return STRIPE_SECTORS;
+ return RAID5_STRIPE_SECTORS(conf);
}
static int retry_aligned_read(struct r5conf *conf, struct bio *raid_bio,
@@ -6131,14 +6319,14 @@
int handled = 0;
logical_sector = raid_bio->bi_iter.bi_sector &
- ~((sector_t)STRIPE_SECTORS-1);
+ ~((sector_t)RAID5_STRIPE_SECTORS(conf)-1);
sector = raid5_compute_sector(conf, logical_sector,
0, &dd_idx, NULL);
last_sector = bio_end_sector(raid_bio);
for (; logical_sector < last_sector;
- logical_sector += STRIPE_SECTORS,
- sector += STRIPE_SECTORS,
+ logical_sector += RAID5_STRIPE_SECTORS(conf),
+ sector += RAID5_STRIPE_SECTORS(conf),
scnt++) {
if (scnt < offset)
@@ -6177,6 +6365,8 @@
static int handle_active_stripes(struct r5conf *conf, int group,
struct r5worker *worker,
struct list_head *temp_inactive_list)
+ __releases(&conf->device_lock)
+ __acquires(&conf->device_lock)
{
struct stripe_head *batch[MAX_STRIPE_BATCH], *sh;
int i, batch_size = 0, hash;
@@ -6329,7 +6519,18 @@
spin_unlock_irq(&conf->device_lock);
md_check_recovery(mddev);
spin_lock_irq(&conf->device_lock);
+
+ /*
+ * Waiting on MD_SB_CHANGE_PENDING below may deadlock
+ * seeing md_check_recovery() is needed to clear
+ * the flag when using mdmon.
+ */
+ continue;
}
+
+ wait_event_lock_irq(mddev->sb_wait,
+ !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags),
+ conf->device_lock);
}
pr_debug("%d stripes handled\n", handled);
@@ -6469,6 +6670,100 @@
raid5_show_rmw_level,
raid5_store_rmw_level);
+static ssize_t
+raid5_show_stripe_size(struct mddev *mddev, char *page)
+{
+ struct r5conf *conf;
+ int ret = 0;
+
+ spin_lock(&mddev->lock);
+ conf = mddev->private;
+ if (conf)
+ ret = sprintf(page, "%lu\n", RAID5_STRIPE_SIZE(conf));
+ spin_unlock(&mddev->lock);
+ return ret;
+}
+
+#if PAGE_SIZE != DEFAULT_STRIPE_SIZE
+static ssize_t
+raid5_store_stripe_size(struct mddev *mddev, const char *page, size_t len)
+{
+ struct r5conf *conf;
+ unsigned long new;
+ int err;
+ int size;
+
+ if (len >= PAGE_SIZE)
+ return -EINVAL;
+ if (kstrtoul(page, 10, &new))
+ return -EINVAL;
+
+ /*
+ * The value should not be bigger than PAGE_SIZE. It requires to
+ * be multiple of DEFAULT_STRIPE_SIZE and the value should be power
+ * of two.
+ */
+ if (new % DEFAULT_STRIPE_SIZE != 0 ||
+ new > PAGE_SIZE || new == 0 ||
+ new != roundup_pow_of_two(new))
+ return -EINVAL;
+
+ err = mddev_lock(mddev);
+ if (err)
+ return err;
+
+ conf = mddev->private;
+ if (!conf) {
+ err = -ENODEV;
+ goto out_unlock;
+ }
+
+ if (new == conf->stripe_size)
+ goto out_unlock;
+
+ pr_debug("md/raid: change stripe_size from %lu to %lu\n",
+ conf->stripe_size, new);
+
+ if (mddev->sync_thread ||
+ test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) ||
+ mddev->reshape_position != MaxSector ||
+ mddev->sysfs_active) {
+ err = -EBUSY;
+ goto out_unlock;
+ }
+
+ mddev_suspend(mddev);
+ mutex_lock(&conf->cache_size_mutex);
+ size = conf->max_nr_stripes;
+
+ shrink_stripes(conf);
+
+ conf->stripe_size = new;
+ conf->stripe_shift = ilog2(new) - 9;
+ conf->stripe_sectors = new >> 9;
+ if (grow_stripes(conf, size)) {
+ pr_warn("md/raid:%s: couldn't allocate buffers\n",
+ mdname(mddev));
+ err = -ENOMEM;
+ }
+ mutex_unlock(&conf->cache_size_mutex);
+ mddev_resume(mddev);
+
+out_unlock:
+ mddev_unlock(mddev);
+ return err ?: len;
+}
+
+static struct md_sysfs_entry
+raid5_stripe_size = __ATTR(stripe_size, 0644,
+ raid5_show_stripe_size,
+ raid5_store_stripe_size);
+#else
+static struct md_sysfs_entry
+raid5_stripe_size = __ATTR(stripe_size, 0444,
+ raid5_show_stripe_size,
+ NULL);
+#endif
static ssize_t
raid5_show_preread_threshold(struct mddev *mddev, char *page)
@@ -6548,14 +6843,14 @@
if (!conf)
err = -ENODEV;
else if (new != conf->skip_copy) {
+ struct request_queue *q = mddev->queue;
+
mddev_suspend(mddev);
conf->skip_copy = new;
if (new)
- mddev->queue->backing_dev_info->capabilities |=
- BDI_CAP_STABLE_WRITES;
+ blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, q);
else
- mddev->queue->backing_dev_info->capabilities &=
- ~BDI_CAP_STABLE_WRITES;
+ blk_queue_flag_clear(QUEUE_FLAG_STABLE_WRITES, q);
mddev_resume(mddev);
}
mddev_unlock(mddev);
@@ -6595,7 +6890,6 @@
static int alloc_thread_groups(struct r5conf *conf, int cnt,
int *group_cnt,
- int *worker_cnt_per_group,
struct r5worker_group **worker_groups);
static ssize_t
raid5_store_group_thread_cnt(struct mddev *mddev, const char *page, size_t len)
@@ -6604,7 +6898,7 @@
unsigned int new;
int err;
struct r5worker_group *new_groups, *old_groups;
- int group_cnt, worker_cnt_per_group;
+ int group_cnt;
if (len >= PAGE_SIZE)
return -EINVAL;
@@ -6627,13 +6921,11 @@
if (old_groups)
flush_workqueue(raid5_wq);
- err = alloc_thread_groups(conf, new,
- &group_cnt, &worker_cnt_per_group,
- &new_groups);
+ err = alloc_thread_groups(conf, new, &group_cnt, &new_groups);
if (!err) {
spin_lock_irq(&conf->device_lock);
conf->group_cnt = group_cnt;
- conf->worker_cnt_per_group = worker_cnt_per_group;
+ conf->worker_cnt_per_group = new;
conf->worker_groups = new_groups;
spin_unlock_irq(&conf->device_lock);
@@ -6660,7 +6952,9 @@
&raid5_group_thread_cnt.attr,
&raid5_skip_copy.attr,
&raid5_rmw_level.attr,
+ &raid5_stripe_size.attr,
&r5c_journal_mode.attr,
+ &ppl_write_hint.attr,
NULL,
};
static struct attribute_group raid5_attrs_group = {
@@ -6668,16 +6962,13 @@
.attrs = raid5_attrs,
};
-static int alloc_thread_groups(struct r5conf *conf, int cnt,
- int *group_cnt,
- int *worker_cnt_per_group,
+static int alloc_thread_groups(struct r5conf *conf, int cnt, int *group_cnt,
struct r5worker_group **worker_groups)
{
int i, j, k;
ssize_t size;
struct r5worker *workers;
- *worker_cnt_per_group = cnt;
if (cnt == 0) {
*group_cnt = 0;
*worker_groups = NULL;
@@ -6743,25 +7034,25 @@
static void free_scratch_buffer(struct r5conf *conf, struct raid5_percpu *percpu)
{
safe_put_page(percpu->spare_page);
- if (percpu->scribble)
- flex_array_free(percpu->scribble);
percpu->spare_page = NULL;
+ kvfree(percpu->scribble);
percpu->scribble = NULL;
}
static int alloc_scratch_buffer(struct r5conf *conf, struct raid5_percpu *percpu)
{
- if (conf->level == 6 && !percpu->spare_page)
+ if (conf->level == 6 && !percpu->spare_page) {
percpu->spare_page = alloc_page(GFP_KERNEL);
- if (!percpu->scribble)
- percpu->scribble = scribble_alloc(max(conf->raid_disks,
- conf->previous_raid_disks),
- max(conf->chunk_sectors,
- conf->prev_chunk_sectors)
- / STRIPE_SECTORS,
- GFP_KERNEL);
+ if (!percpu->spare_page)
+ return -ENOMEM;
+ }
- if (!percpu->scribble || (conf->level == 6 && !percpu->spare_page)) {
+ if (scribble_alloc(percpu,
+ max(conf->raid_disks,
+ conf->previous_raid_disks),
+ max(conf->chunk_sectors,
+ conf->prev_chunk_sectors)
+ / RAID5_STRIPE_SECTORS(conf))) {
free_scratch_buffer(conf, percpu);
return -ENOMEM;
}
@@ -6877,7 +7168,7 @@
struct disk_info *disk;
char pers_name[6];
int i;
- int group_cnt, worker_cnt_per_group;
+ int group_cnt;
struct r5worker_group *new_group;
int ret;
@@ -6913,6 +7204,12 @@
conf = kzalloc(sizeof(struct r5conf), GFP_KERNEL);
if (conf == NULL)
goto abort;
+
+#if PAGE_SIZE != DEFAULT_STRIPE_SIZE
+ conf->stripe_size = DEFAULT_STRIPE_SIZE;
+ conf->stripe_shift = ilog2(DEFAULT_STRIPE_SIZE) - 9;
+ conf->stripe_sectors = DEFAULT_STRIPE_SIZE >> 9;
+#endif
INIT_LIST_HEAD(&conf->free_list);
INIT_LIST_HEAD(&conf->pending_list);
conf->pending_data = kcalloc(PENDING_IO_MAX,
@@ -6923,15 +7220,14 @@
for (i = 0; i < PENDING_IO_MAX; i++)
list_add(&conf->pending_data[i].sibling, &conf->free_list);
/* Don't enable multi-threading by default*/
- if (!alloc_thread_groups(conf, 0, &group_cnt, &worker_cnt_per_group,
- &new_group)) {
+ if (!alloc_thread_groups(conf, 0, &group_cnt, &new_group)) {
conf->group_cnt = group_cnt;
- conf->worker_cnt_per_group = worker_cnt_per_group;
+ conf->worker_cnt_per_group = 0;
conf->worker_groups = new_group;
} else
goto abort;
spin_lock_init(&conf->device_lock);
- seqcount_init(&conf->gen_lock);
+ seqcount_spinlock_init(&conf->gen_lock, &conf->device_lock);
mutex_init(&conf->cache_size_mutex);
init_waitqueue_head(&conf->wait_for_quiescent);
init_waitqueue_head(&conf->wait_for_stripe);
@@ -7065,8 +7361,8 @@
conf->min_nr_stripes = NR_STRIPES;
if (mddev->reshape_position != MaxSector) {
int stripes = max_t(int,
- ((mddev->chunk_sectors << 9) / STRIPE_SIZE) * 4,
- ((mddev->new_chunk_sectors << 9) / STRIPE_SIZE) * 4);
+ ((mddev->chunk_sectors << 9) / RAID5_STRIPE_SIZE(conf)) * 4,
+ ((mddev->new_chunk_sectors << 9) / RAID5_STRIPE_SIZE(conf)) * 4);
conf->min_nr_stripes = max(NR_STRIPES, stripes);
if (conf->min_nr_stripes != NR_STRIPES)
pr_info("md/raid:%s: force stripe size %d for reshape\n",
@@ -7139,6 +7435,12 @@
return 1;
}
return 0;
+}
+
+static void raid5_set_io_opt(struct r5conf *conf)
+{
+ blk_queue_io_opt(conf->mddev->queue, (conf->chunk_sectors << 9) *
+ (conf->raid_disks - conf->max_degraded));
}
static int raid5_run(struct mddev *mddev)
@@ -7425,13 +7727,10 @@
int data_disks = conf->previous_raid_disks - conf->max_degraded;
int stripe = data_disks *
((mddev->chunk_sectors << 9) / PAGE_SIZE);
- if (mddev->queue->backing_dev_info->ra_pages < 2 * stripe)
- mddev->queue->backing_dev_info->ra_pages = 2 * stripe;
chunk_size = mddev->chunk_sectors << 9;
blk_queue_io_min(mddev->queue, chunk_size);
- blk_queue_io_opt(mddev->queue, chunk_size *
- (conf->raid_disks - conf->max_degraded));
+ raid5_set_io_opt(conf);
mddev->queue->limits.raid_partial_stripes_expensive = 1;
/*
* We can only discard a whole stripe. It doesn't make sense to
@@ -7716,6 +8015,7 @@
*/
if (rdev->saved_raid_disk >= 0 &&
rdev->saved_raid_disk >= first &&
+ rdev->saved_raid_disk <= last &&
conf->disks[rdev->saved_raid_disk].rdev == NULL)
first = rdev->saved_raid_disk;
@@ -7797,14 +8097,14 @@
* stripe_heads first.
*/
struct r5conf *conf = mddev->private;
- if (((mddev->chunk_sectors << 9) / STRIPE_SIZE) * 4
+ if (((mddev->chunk_sectors << 9) / RAID5_STRIPE_SIZE(conf)) * 4
> conf->min_nr_stripes ||
- ((mddev->new_chunk_sectors << 9) / STRIPE_SIZE) * 4
+ ((mddev->new_chunk_sectors << 9) / RAID5_STRIPE_SIZE(conf)) * 4
> conf->min_nr_stripes) {
pr_warn("md/raid:%s: reshape: not enough stripes. Needed %lu\n",
mdname(mddev),
((max(mddev->chunk_sectors, mddev->new_chunk_sectors) << 9)
- / STRIPE_SIZE)*4);
+ / RAID5_STRIPE_SIZE(conf))*4);
return 0;
}
return 1;
@@ -7940,8 +8240,8 @@
else
rdev->recovery_offset = 0;
- if (sysfs_link_rdev(mddev, rdev))
- /* Failure here is OK */;
+ /* Failure here is OK */
+ sysfs_link_rdev(mddev, rdev);
}
} else if (rdev->raid_disk >= conf->previous_raid_disks
&& !test_bit(Faulty, &rdev->flags)) {
@@ -8015,16 +8315,8 @@
spin_unlock_irq(&conf->device_lock);
wake_up(&conf->wait_for_overlap);
- /* read-ahead size must cover two whole stripes, which is
- * 2 * (datadisks) * chunksize where 'n' is the number of raid devices
- */
- if (conf->mddev->queue) {
- int data_disks = conf->raid_disks - conf->max_degraded;
- int stripe = data_disks * ((conf->chunk_sectors << 9)
- / PAGE_SIZE);
- if (conf->mddev->queue->backing_dev_info->ra_pages < 2 * stripe)
- conf->mddev->queue->backing_dev_info->ra_pages = 2 * stripe;
- }
+ if (conf->mddev->queue)
+ raid5_set_io_opt(conf);
}
}
@@ -8136,7 +8428,7 @@
while (chunksect && (mddev->array_sectors & (chunksect-1)))
chunksect >>= 1;
- if ((chunksect<<9) < STRIPE_SIZE)
+ if ((chunksect<<9) < RAID5_STRIPE_SIZE((struct r5conf *)mddev->private))
/* array size does not allow a suitable chunk size */
return ERR_PTR(-EINVAL);
@@ -8423,7 +8715,6 @@
.finish_reshape = raid5_finish_reshape,
.quiesce = raid5_quiesce,
.takeover = raid6_takeover,
- .congested = raid5_congested,
.change_consistency_policy = raid5_change_consistency_policy,
};
static struct md_personality raid5_personality =
@@ -8448,7 +8739,6 @@
.finish_reshape = raid5_finish_reshape,
.quiesce = raid5_quiesce,
.takeover = raid5_takeover,
- .congested = raid5_congested,
.change_consistency_policy = raid5_change_consistency_policy,
};
@@ -8474,7 +8764,6 @@
.finish_reshape = raid5_finish_reshape,
.quiesce = raid5_quiesce,
.takeover = raid4_takeover,
- .congested = raid5_congested,
.change_consistency_policy = raid5_change_consistency_policy,
};
--
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