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Commit 6a159d2a authored by Zhao Lei's avatar Zhao Lei Committed by David Sterba
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btrfs: reada: add all reachable mirrors into reada device list 



If some device is not reachable, we should bypass and continus addingb
next, instead of break on bad device.

Signed-off-by: default avatarZhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent a3f7fde2

fs/btrfs/reada.c

+9 −11
Original line number Diff line number Diff line
@@ -328,7 +328,6 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, 
	u64 length;

	int real_stripes;

	int nzones = 0;

	int i;

	unsigned long index = logical >> PAGE_CACHE_SHIFT;

	int dev_replace_is_ongoing;
@@ -375,9 +374,9 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, 
		dev = bbio->stripes[nzones].dev;

		zone = reada_find_zone(fs_info, dev, logical, bbio);

		if (!zone)

			break;

			continue;



		re->zones[nzones] = zone;

		re->zones[re->nzones++] = zone;

		spin_lock(&zone->lock);

		if (!zone->elems)

			kref_get(&zone->refcnt);
@@ -387,8 +386,7 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, 
		kref_put(&zone->refcnt, reada_zone_release);

		spin_unlock(&fs_info->reada_lock);

	}

	re->nzones = nzones;

	if (nzones == 0) {

	if (re->nzones == 0) {

		/* not a single zone found, error and out */

		goto error;

	}
@@ -413,8 +411,9 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, 
	prev_dev = NULL;

	dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(

			&fs_info->dev_replace);

	for (i = 0; i < nzones; ++i) {

		dev = bbio->stripes[i].dev;

	for (nzones = 0; nzones < re->nzones; ++nzones) {

		dev = re->zones[nzones]->device;



		if (dev == prev_dev) {

			/*

			 * in case of DUP, just add the first zone. As both
@@ -445,8 +444,8 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, 
		prev_dev = dev;

		ret = radix_tree_insert(&dev->reada_extents, index, re);

		if (ret) {

			while (--i >= 0) {

				dev = bbio->stripes[i].dev;

			while (--nzones >= 0) {

				dev = re->zones[nzones]->device;

				BUG_ON(dev == NULL);

				/* ignore whether the entry was inserted */

				radix_tree_delete(&dev->reada_extents, index);
@@ -465,10 +464,9 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, 
	return re;



error:

	while (nzones) {

	for (nzones = 0; nzones < re->nzones; ++nzones) {

		struct reada_zone *zone;



		--nzones;

		zone = re->zones[nzones];

		kref_get(&zone->refcnt);

		spin_lock(&zone->lock);