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Diffstat (limited to 'fs/btrfs/ctree.c')
-rw-r--r--fs/btrfs/ctree.c28
1 files changed, 19 insertions, 9 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index e801f226d7e..4106264fbc6 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -220,10 +220,12 @@ struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root)
*/
static void add_root_to_dirty_list(struct btrfs_root *root)
{
+ spin_lock(&root->fs_info->trans_lock);
if (root->track_dirty && list_empty(&root->dirty_list)) {
list_add(&root->dirty_list,
&root->fs_info->dirty_cowonly_roots);
}
+ spin_unlock(&root->fs_info->trans_lock);
}
/*
@@ -723,7 +725,7 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
cur = btrfs_find_tree_block(root, blocknr, blocksize);
if (cur)
- uptodate = btrfs_buffer_uptodate(cur, gen);
+ uptodate = btrfs_buffer_uptodate(cur, gen, 0);
else
uptodate = 0;
if (!cur || !uptodate) {
@@ -1358,7 +1360,12 @@ static noinline int reada_for_balance(struct btrfs_root *root,
block1 = btrfs_node_blockptr(parent, slot - 1);
gen = btrfs_node_ptr_generation(parent, slot - 1);
eb = btrfs_find_tree_block(root, block1, blocksize);
- if (eb && btrfs_buffer_uptodate(eb, gen))
+ /*
+ * if we get -eagain from btrfs_buffer_uptodate, we
+ * don't want to return eagain here. That will loop
+ * forever
+ */
+ if (eb && btrfs_buffer_uptodate(eb, gen, 1) != 0)
block1 = 0;
free_extent_buffer(eb);
}
@@ -1366,7 +1373,7 @@ static noinline int reada_for_balance(struct btrfs_root *root,
block2 = btrfs_node_blockptr(parent, slot + 1);
gen = btrfs_node_ptr_generation(parent, slot + 1);
eb = btrfs_find_tree_block(root, block2, blocksize);
- if (eb && btrfs_buffer_uptodate(eb, gen))
+ if (eb && btrfs_buffer_uptodate(eb, gen, 1) != 0)
block2 = 0;
free_extent_buffer(eb);
}
@@ -1504,8 +1511,9 @@ read_block_for_search(struct btrfs_trans_handle *trans,
tmp = btrfs_find_tree_block(root, blocknr, blocksize);
if (tmp) {
- if (btrfs_buffer_uptodate(tmp, 0)) {
- if (btrfs_buffer_uptodate(tmp, gen)) {
+ /* first we do an atomic uptodate check */
+ if (btrfs_buffer_uptodate(tmp, 0, 1) > 0) {
+ if (btrfs_buffer_uptodate(tmp, gen, 1) > 0) {
/*
* we found an up to date block without
* sleeping, return
@@ -1523,8 +1531,9 @@ read_block_for_search(struct btrfs_trans_handle *trans,
free_extent_buffer(tmp);
btrfs_set_path_blocking(p);
+ /* now we're allowed to do a blocking uptodate check */
tmp = read_tree_block(root, blocknr, blocksize, gen);
- if (tmp && btrfs_buffer_uptodate(tmp, gen)) {
+ if (tmp && btrfs_buffer_uptodate(tmp, gen, 0) > 0) {
*eb_ret = tmp;
return 0;
}
@@ -1559,7 +1568,7 @@ read_block_for_search(struct btrfs_trans_handle *trans,
* and give up so that our caller doesn't loop forever
* on our EAGAINs.
*/
- if (!btrfs_buffer_uptodate(tmp, 0))
+ if (!btrfs_buffer_uptodate(tmp, 0, 0))
ret = -EIO;
free_extent_buffer(tmp);
}
@@ -4043,7 +4052,7 @@ again:
tmp = btrfs_find_tree_block(root, blockptr,
btrfs_level_size(root, level - 1));
- if (tmp && btrfs_buffer_uptodate(tmp, gen)) {
+ if (tmp && btrfs_buffer_uptodate(tmp, gen, 1) > 0) {
free_extent_buffer(tmp);
break;
}
@@ -4166,7 +4175,8 @@ next:
struct extent_buffer *cur;
cur = btrfs_find_tree_block(root, blockptr,
btrfs_level_size(root, level - 1));
- if (!cur || !btrfs_buffer_uptodate(cur, gen)) {
+ if (!cur ||
+ btrfs_buffer_uptodate(cur, gen, 1) <= 0) {
slot++;
if (cur)
free_extent_buffer(cur);