summaryrefslogtreecommitdiff
path: root/fs/btrfs/disk-io.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs/disk-io.c')
-rw-r--r--fs/btrfs/disk-io.c40
1 files changed, 24 insertions, 16 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 20196f411206..a7ffc88a7dbe 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -323,7 +323,8 @@ static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
* in the wrong place.
*/
static int verify_parent_transid(struct extent_io_tree *io_tree,
- struct extent_buffer *eb, u64 parent_transid)
+ struct extent_buffer *eb, u64 parent_transid,
+ int atomic)
{
struct extent_state *cached_state = NULL;
int ret;
@@ -331,6 +332,9 @@ static int verify_parent_transid(struct extent_io_tree *io_tree,
if (!parent_transid || btrfs_header_generation(eb) == parent_transid)
return 0;
+ if (atomic)
+ return -EAGAIN;
+
lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1,
0, &cached_state);
if (extent_buffer_uptodate(eb) &&
@@ -372,7 +376,8 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
ret = read_extent_buffer_pages(io_tree, eb, start,
WAIT_COMPLETE,
btree_get_extent, mirror_num);
- if (!ret && !verify_parent_transid(io_tree, eb, parent_transid))
+ if (!ret && !verify_parent_transid(io_tree, eb,
+ parent_transid, 0))
break;
/*
@@ -383,17 +388,16 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags))
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)
break;
+ if (!failed_mirror) {
+ failed = 1;
+ failed_mirror = eb->read_mirror;
+ }
+
mirror_num++;
if (mirror_num == failed_mirror)
mirror_num++;
@@ -564,7 +568,7 @@ struct extent_buffer *find_eb_for_page(struct extent_io_tree *tree,
}
static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
- struct extent_state *state)
+ struct extent_state *state, int mirror)
{
struct extent_io_tree *tree;
u64 found_start;
@@ -589,6 +593,7 @@ static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
if (!reads_done)
goto err;
+ eb->read_mirror = mirror;
if (test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) {
ret = -EIO;
goto err;
@@ -652,7 +657,7 @@ static int btree_io_failed_hook(struct page *page, int failed_mirror)
eb = (struct extent_buffer *)page->private;
set_bit(EXTENT_BUFFER_IOERR, &eb->bflags);
- eb->failed_mirror = failed_mirror;
+ eb->read_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 */
@@ -1202,7 +1207,7 @@ static int __must_check find_and_setup_root(struct btrfs_root *tree_root,
root->commit_root = NULL;
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
blocksize, generation);
- if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) {
+ if (!root->node || !btrfs_buffer_uptodate(root->node, generation, 0)) {
free_extent_buffer(root->node);
root->node = NULL;
return -EIO;
@@ -2254,9 +2259,9 @@ int open_ctree(struct super_block *sb,
goto fail_sb_buffer;
}
- if (sectorsize < PAGE_SIZE) {
- printk(KERN_WARNING "btrfs: Incompatible sector size "
- "found on %s\n", sb->s_id);
+ if (sectorsize != PAGE_SIZE) {
+ printk(KERN_WARNING "btrfs: Incompatible sector size(%lu) "
+ "found on %s\n", (unsigned long)sectorsize, sb->s_id);
goto fail_sb_buffer;
}
@@ -3143,7 +3148,8 @@ int close_ctree(struct btrfs_root *root)
return 0;
}
-int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid)
+int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
+ int atomic)
{
int ret;
struct inode *btree_inode = buf->pages[0]->mapping->host;
@@ -3153,7 +3159,9 @@ int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid)
return ret;
ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf,
- parent_transid);
+ parent_transid, atomic);
+ if (ret == -EAGAIN)
+ return ret;
return !ret;
}