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Commit b2d5ad82 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 

Pull btrfs fixes from Chris Mason:
 "The important part of this pull is Filipe's set of fixes for btrfs
  device replacement.  Filipe fixed a few issues seen on the list and a
  number he found on his own"

* 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: deal with duplciates during extent_map insertion in btrfs_get_extent
  Btrfs: fix race between device replace and read repair
  Btrfs: fix race between device replace and discard
  Btrfs: fix race between device replace and chunk allocation
  Btrfs: fix race setting block group back to RW mode during device replace
  Btrfs: fix unprotected assignment of the left cursor for device replace
  Btrfs: fix race setting block group readonly during device replace
  Btrfs: fix race between device replace and block group removal
  Btrfs: fix race between readahead and device replace/removal
parents a3021a59 8dff9c85

fs/btrfs/extent-tree.c

+6 −0
Original line number Diff line number Diff line
@@ -2042,6 +2042,11 @@ int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, 
	struct btrfs_bio *bbio = NULL;





	/*

	 * Avoid races with device replace and make sure our bbio has devices

	 * associated to its stripes that don't go away while we are discarding.

	 */

	btrfs_bio_counter_inc_blocked(root->fs_info);

	/* Tell the block device(s) that the sectors can be discarded */

	ret = btrfs_map_block(root->fs_info, REQ_DISCARD,

			      bytenr, &num_bytes, &bbio, 0);
@@ -2074,6 +2079,7 @@ int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, 
		}

		btrfs_put_bbio(bbio);

	}

	btrfs_bio_counter_dec(root->fs_info);



	if (actual_bytes)

		*actual_bytes = discarded_bytes;

fs/btrfs/extent_io.c

+10 −0
Original line number Diff line number Diff line
@@ -2025,9 +2025,16 @@ int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical, 
	bio->bi_iter.bi_size = 0;

	map_length = length;



	/*

	 * Avoid races with device replace and make sure our bbio has devices

	 * associated to its stripes that don't go away while we are doing the

	 * read repair operation.

	 */

	btrfs_bio_counter_inc_blocked(fs_info);

	ret = btrfs_map_block(fs_info, WRITE, logical,

			      &map_length, &bbio, mirror_num);

	if (ret) {

		btrfs_bio_counter_dec(fs_info);

		bio_put(bio);

		return -EIO;

	}
@@ -2037,6 +2044,7 @@ int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical, 
	dev = bbio->stripes[mirror_num-1].dev;

	btrfs_put_bbio(bbio);

	if (!dev || !dev->bdev || !dev->writeable) {

		btrfs_bio_counter_dec(fs_info);

		bio_put(bio);

		return -EIO;

	}
@@ -2045,6 +2053,7 @@ int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical, 


	if (btrfsic_submit_bio_wait(WRITE_SYNC, bio)) {

		/* try to remap that extent elsewhere? */

		btrfs_bio_counter_dec(fs_info);

		bio_put(bio);

		btrfs_dev_stat_inc_and_print(dev, BTRFS_DEV_STAT_WRITE_ERRS);

		return -EIO;
@@ -2054,6 +2063,7 @@ int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical, 
		"read error corrected: ino %llu off %llu (dev %s sector %llu)",

				  btrfs_ino(inode), start,

				  rcu_str_deref(dev->name), sector);

	btrfs_bio_counter_dec(fs_info);

	bio_put(bio);

	return 0;

}

fs/btrfs/inode.c

+12 −1
Original line number Diff line number Diff line
@@ -6979,7 +6979,18 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, 
		 * existing will always be non-NULL, since there must be

		 * extent causing the -EEXIST.

		 */

		if (start >= extent_map_end(existing) ||

		if (existing->start == em->start &&

		    extent_map_end(existing) == extent_map_end(em) &&

		    em->block_start == existing->block_start) {

			/*

			 * these two extents are the same, it happens

			 * with inlines especially

			 */

			free_extent_map(em);

			em = existing;

			err = 0;



		} else if (start >= extent_map_end(existing) ||

		    start <= existing->start) {

			/*

			 * The existing extent map is the one nearest to

fs/btrfs/ordered-data.c

+5 −1
Original line number Diff line number Diff line
@@ -718,12 +718,13 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root, int nr, 
	return count;

}



void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, int nr,

int btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, int nr,

			      const u64 range_start, const u64 range_len)

{

	struct btrfs_root *root;

	struct list_head splice;

	int done;

	int total_done = 0;



	INIT_LIST_HEAD(&splice);
@@ -742,6 +743,7 @@ void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, int nr, 
		done = btrfs_wait_ordered_extents(root, nr,

						  range_start, range_len);

		btrfs_put_fs_root(root);

		total_done += done;



		spin_lock(&fs_info->ordered_root_lock);

		if (nr != -1) {
@@ -752,6 +754,8 @@ void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, int nr, 
	list_splice_tail(&splice, &fs_info->ordered_roots);

	spin_unlock(&fs_info->ordered_root_lock);

	mutex_unlock(&fs_info->ordered_operations_mutex);



	return total_done;

}



/*

fs/btrfs/ordered-data.h

+1 −1
Original line number Diff line number Diff line
@@ -199,7 +199,7 @@ int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, 
			   u32 *sum, int len);

int btrfs_wait_ordered_extents(struct btrfs_root *root, int nr,

			       const u64 range_start, const u64 range_len);

void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, int nr,

int btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, int nr,

			      const u64 range_start, const u64 range_len);

void btrfs_get_logged_extents(struct inode *inode,

			      struct list_head *logged_list,