[PATCH v2 2/7] btrfs: make repair_io_failure available outside of extent_io.c

[Qu Wenruo <wqu@suse.com>]

Remove the static so that the function can be used by the new read
repair code, and give it a btrfs_ prefix.

Signed-off-by: Qu Wenruo <wqu@suse.com>
[hch: split from a larger patch]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 fs/btrfs/extent_io.c | 19 ++++++++++---------
 fs/btrfs/extent_io.h |  3 +++
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 1bd1b1253f9d..1083d6cfa858 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2321,9 +2321,9 @@ int free_io_failure(struct extent_io_tree *failure_tree,
  * currently, there can be no more than two copies of every data bit. thus,
  * exactly one rewrite is required.
  */
-static int repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
-			     u64 length, u64 logical, struct page *page,
-			     unsigned int pg_offset, int mirror_num)
+int btrfs_repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
+			    u64 length, u64 logical, struct page *page,
+			    unsigned int pg_offset, int mirror_num)
 {
 	struct btrfs_device *dev;
 	struct bio_vec bvec;
@@ -2415,8 +2415,9 @@ int btrfs_repair_eb_io_failure(const struct extent_buffer *eb, int mirror_num)
 	for (i = 0; i < num_pages; i++) {
 		struct page *p = eb->pages[i];
 
-		ret = repair_io_failure(fs_info, 0, start, PAGE_SIZE, start, p,
-					start - page_offset(p), mirror_num);
+		ret = btrfs_repair_io_failure(fs_info, 0, start, PAGE_SIZE,
+					      start, p, start - page_offset(p),
+					      mirror_num);
 		if (ret)
 			break;
 		start += PAGE_SIZE;
@@ -2466,9 +2467,9 @@ int clean_io_failure(struct btrfs_fs_info *fs_info,
 		num_copies = btrfs_num_copies(fs_info, failrec->logical,
 					      failrec->len);
 		if (num_copies > 1)  {
-			repair_io_failure(fs_info, ino, start, failrec->len,
-					  failrec->logical, page, pg_offset,
-					  failrec->failed_mirror);
+			btrfs_repair_io_failure(fs_info, ino, start,
+					failrec->len, failrec->logical,
+					page, pg_offset, failrec->failed_mirror);
 		}
 	}
 
@@ -2626,7 +2627,7 @@ static bool btrfs_check_repairable(struct inode *inode,
 	 *
 	 * Since we're only doing repair for one sector, we only need to get
 	 * a good copy of the failed sector and if we succeed, we have setup
-	 * everything for repair_io_failure to do the rest for us.
+	 * everything for btrfs_repair_io_failure() to do the rest for us.
 	 */
 	ASSERT(failed_mirror);
 	failrec->failed_mirror = failed_mirror;
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 956fa434df43..6cdcea1551a6 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -276,6 +276,9 @@ int btrfs_repair_one_sector(struct inode *inode,
 			    struct page *page, unsigned int pgoff,
 			    u64 start, int failed_mirror,
 			    submit_bio_hook_t *submit_bio_hook);
+int btrfs_repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
+			    u64 length, u64 logical, struct page *page,
+			    unsigned int pg_offset, int mirror_num);
 
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 bool find_lock_delalloc_range(struct inode *inode,
-- 
2.36.1