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-rw-r--r--fs/btrfs/disk-io.c43
-rw-r--r--fs/btrfs/extent_io.c42
-rw-r--r--fs/btrfs/extent_io.h8
3 files changed, 66 insertions, 27 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 53c5ea702799..6107b6958413 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -360,9 +360,11 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
u64 start, u64 parent_transid)
{
struct extent_io_tree *io_tree;
+ int failed = 0;
int ret;
int num_copies = 0;
int mirror_num = 0;
+ int failed_mirror = 0;
clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree;
@@ -371,7 +373,7 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
WAIT_COMPLETE,
btree_get_extent, mirror_num);
if (!ret && !verify_parent_transid(io_tree, eb, parent_transid))
- return ret;
+ break;
/*
* This buffer's crc is fine, but its contents are corrupted, so
@@ -379,18 +381,31 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
* any less wrong.
*/
if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags))
- return ret;
+ break;
+
+ if (!failed_mirror) {
+ failed = 1;
+ printk(KERN_ERR "failed mirror was %d\n", eb->failed_mirror);
+ failed_mirror = eb->failed_mirror;
+ }
num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
eb->start, eb->len);
if (num_copies == 1)
- return ret;
+ break;
mirror_num++;
+ if (mirror_num == failed_mirror)
+ mirror_num++;
+
if (mirror_num > num_copies)
- return ret;
+ break;
}
- return -EIO;
+
+ if (failed && !ret)
+ repair_eb_io_failure(root, eb, failed_mirror);
+
+ return ret;
}
/*
@@ -575,6 +590,11 @@ static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
if (!reads_done)
goto err;
+ if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) {
+ ret = -EIO;
+ goto err;
+ }
+
found_start = btrfs_header_bytenr(eb);
if (found_start != eb->start) {
printk_ratelimited(KERN_INFO "btrfs bad tree block start "
@@ -626,21 +646,16 @@ out:
return ret;
}
-static int btree_io_failed_hook(struct bio *failed_bio,
- struct page *page, u64 start, u64 end,
- int mirror_num, struct extent_state *state)
+static int btree_io_failed_hook(struct page *page, int failed_mirror)
{
struct extent_buffer *eb;
struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
eb = (struct extent_buffer *)page->private;
- if (page != eb->pages[0])
- return -EIO;
-
- if (test_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags)) {
- clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags);
+ set_bit(EXTENT_BUFFER_IOERR, &eb->bflags);
+ eb->failed_mirror = failed_mirror;
+ if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags))
btree_readahead_hook(root, eb, eb->start, -EIO);
- }
return -EIO; /* we fixed nothing */
}
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index b71cc4547d47..49a368593a16 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1915,6 +1915,26 @@ int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start,
return 0;
}
+int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
+ int mirror_num)
+{
+ struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree;
+ u64 start = eb->start;
+ unsigned long i, num_pages = num_extent_pages(eb->start, eb->len);
+ int ret;
+
+ for (i = 0; i < num_pages; i++) {
+ struct page *p = extent_buffer_page(eb, i);
+ ret = repair_io_failure(map_tree, start, PAGE_CACHE_SIZE,
+ start, p, mirror_num);
+ if (ret)
+ break;
+ start += PAGE_CACHE_SIZE;
+ }
+
+ return ret;
+}
+
/*
* each time an IO finishes, we do a fast check in the IO failure tree
* to see if we need to process or clean up an io_failure_record
@@ -2261,6 +2281,7 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
u64 start;
u64 end;
int whole_page;
+ int failed_mirror;
int ret;
if (err)
@@ -2307,9 +2328,16 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
else
clean_io_failure(start, page);
}
- if (!uptodate) {
- int failed_mirror;
+
+ if (!uptodate)
failed_mirror = (int)(unsigned long)bio->bi_bdev;
+
+ if (!uptodate && tree->ops && tree->ops->readpage_io_failed_hook) {
+ ret = tree->ops->readpage_io_failed_hook(page, failed_mirror);
+ if (!ret && !err &&
+ test_bit(BIO_UPTODATE, &bio->bi_flags))
+ uptodate = 1;
+ } else if (!uptodate) {
/*
* The generic bio_readpage_error handles errors the
* following way: If possible, new read requests are
@@ -2323,7 +2351,6 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
ret = bio_readpage_error(bio, page, start, end,
failed_mirror, NULL);
if (ret == 0) {
-error_handled:
uptodate =
test_bit(BIO_UPTODATE, &bio->bi_flags);
if (err)
@@ -2331,13 +2358,6 @@ error_handled:
uncache_state(&cached);
continue;
}
- if (tree->ops && tree->ops->readpage_io_failed_hook) {
- ret = tree->ops->readpage_io_failed_hook(
- bio, page, start, end,
- failed_mirror, state);
- if (ret == 0)
- goto error_handled;
- }
}
if (uptodate && tree->track_uptodate) {
@@ -4396,6 +4416,8 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
goto unlock_exit;
}
+ clear_bit(EXTENT_BUFFER_IOERR, &eb->bflags);
+ eb->failed_mirror = 0;
atomic_set(&eb->io_pages, num_reads);
for (i = start_i; i < num_pages; i++) {
page = extent_buffer_page(eb, i);
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 489d7945154f..38c1af7092f3 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -58,6 +58,7 @@
#define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3
struct extent_state;
+struct btrfs_root;
typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
struct bio *bio, int mirror_num,
@@ -73,9 +74,7 @@ struct extent_io_ops {
size_t size, struct bio *bio,
unsigned long bio_flags);
int (*readpage_io_hook)(struct page *page, u64 start, u64 end);
- int (*readpage_io_failed_hook)(struct bio *bio, struct page *page,
- u64 start, u64 end, int failed_mirror,
- struct extent_state *state);
+ int (*readpage_io_failed_hook)(struct page *page, int failed_mirror);
int (*writepage_io_failed_hook)(struct bio *bio, struct page *page,
u64 start, u64 end,
struct extent_state *state);
@@ -136,6 +135,7 @@ struct extent_buffer {
spinlock_t refs_lock;
atomic_t refs;
atomic_t io_pages;
+ int failed_mirror;
struct list_head leak_list;
struct rcu_head rcu_head;
pid_t lock_owner;
@@ -327,4 +327,6 @@ int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start,
u64 length, u64 logical, struct page *page,
int mirror_num);
int end_extent_writepage(struct page *page, int err, u64 start, u64 end);
+int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb,
+ int mirror_num);
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 09:40:48 +0000