Btrfs: return an error from btrfs_wait_ordered_range
I noticed that if the free space cache has an error writing out it's data it
won't actually error out, it will just carry on. This is because it doesn't
check the return value of btrfs_wait_ordered_range, which didn't actually return
anything. So fix this in order to keep us from making free space cache look
valid when it really isnt. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 14b41d5..3a20a12 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1280,6 +1280,7 @@
}
wait_on_page_writeback(pages[i]);
}
+ faili = num_pages - 1;
err = 0;
if (start_pos < inode->i_size) {
struct btrfs_ordered_extent *ordered;
@@ -1298,8 +1299,10 @@
unlock_page(pages[i]);
page_cache_release(pages[i]);
}
- btrfs_wait_ordered_range(inode, start_pos,
- last_pos - start_pos);
+ err = btrfs_wait_ordered_range(inode, start_pos,
+ last_pos - start_pos);
+ if (err)
+ goto fail;
goto again;
}
if (ordered)
@@ -1808,8 +1811,13 @@
atomic_inc(&root->log_batch);
full_sync = test_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
&BTRFS_I(inode)->runtime_flags);
- if (full_sync)
- btrfs_wait_ordered_range(inode, start, end - start + 1);
+ if (full_sync) {
+ ret = btrfs_wait_ordered_range(inode, start, end - start + 1);
+ if (ret) {
+ mutex_unlock(&inode->i_mutex);
+ goto out;
+ }
+ }
atomic_inc(&root->log_batch);
/*
@@ -1875,27 +1883,20 @@
mutex_unlock(&inode->i_mutex);
if (ret != BTRFS_NO_LOG_SYNC) {
- if (ret > 0) {
- /*
- * If we didn't already wait for ordered extents we need
- * to do that now.
- */
- if (!full_sync)
- btrfs_wait_ordered_range(inode, start,
- end - start + 1);
- ret = btrfs_commit_transaction(trans, root);
- } else {
+ if (!ret) {
ret = btrfs_sync_log(trans, root);
- if (ret == 0) {
+ if (!ret) {
ret = btrfs_end_transaction(trans, root);
- } else {
- if (!full_sync)
- btrfs_wait_ordered_range(inode, start,
- end -
- start + 1);
- ret = btrfs_commit_transaction(trans, root);
+ goto out;
}
}
+ if (!full_sync) {
+ ret = btrfs_wait_ordered_range(inode, start,
+ end - start + 1);
+ if (ret)
+ goto out;
+ }
+ ret = btrfs_commit_transaction(trans, root);
} else {
ret = btrfs_end_transaction(trans, root);
}
@@ -2066,7 +2067,9 @@
bool same_page = ((offset >> PAGE_CACHE_SHIFT) ==
((offset + len - 1) >> PAGE_CACHE_SHIFT));
- btrfs_wait_ordered_range(inode, offset, len);
+ ret = btrfs_wait_ordered_range(inode, offset, len);
+ if (ret)
+ return ret;
mutex_lock(&inode->i_mutex);
/*
@@ -2135,8 +2138,12 @@
btrfs_put_ordered_extent(ordered);
unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart,
lockend, &cached_state, GFP_NOFS);
- btrfs_wait_ordered_range(inode, lockstart,
- lockend - lockstart + 1);
+ ret = btrfs_wait_ordered_range(inode, lockstart,
+ lockend - lockstart + 1);
+ if (ret) {
+ mutex_unlock(&inode->i_mutex);
+ return ret;
+ }
}
path = btrfs_alloc_path();
@@ -2307,7 +2314,10 @@
* wait for ordered IO before we have any locks. We'll loop again
* below with the locks held.
*/
- btrfs_wait_ordered_range(inode, alloc_start, alloc_end - alloc_start);
+ ret = btrfs_wait_ordered_range(inode, alloc_start,
+ alloc_end - alloc_start);
+ if (ret)
+ goto out;
locked_end = alloc_end - 1;
while (1) {
@@ -2331,8 +2341,10 @@
* we can't wait on the range with the transaction
* running or with the extent lock held
*/
- btrfs_wait_ordered_range(inode, alloc_start,
- alloc_end - alloc_start);
+ ret = btrfs_wait_ordered_range(inode, alloc_start,
+ alloc_end - alloc_start);
+ if (ret)
+ goto out;
} else {
if (ordered)
btrfs_put_ordered_extent(ordered);
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 4772f3a..d7c445c 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -1008,8 +1008,13 @@
if (ret)
goto out;
-
- btrfs_wait_ordered_range(inode, 0, (u64)-1);
+ ret = btrfs_wait_ordered_range(inode, 0, (u64)-1);
+ if (ret) {
+ clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, inode->i_size - 1,
+ EXTENT_DIRTY | EXTENT_DELALLOC, 0, 0, NULL,
+ GFP_NOFS);
+ goto out;
+ }
key.objectid = BTRFS_FREE_SPACE_OBJECTID;
key.offset = offset;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 14c6ab7..f1fbf90 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7236,7 +7236,9 @@
* outstanding dirty pages are on disk.
*/
count = iov_length(iov, nr_segs);
- btrfs_wait_ordered_range(inode, offset, count);
+ ret = btrfs_wait_ordered_range(inode, offset, count);
+ if (ret)
+ return ret;
if (rw & WRITE) {
/*
@@ -7577,7 +7579,10 @@
u64 mask = root->sectorsize - 1;
u64 min_size = btrfs_calc_trunc_metadata_size(root, 1);
- btrfs_wait_ordered_range(inode, inode->i_size & (~mask), (u64)-1);
+ ret = btrfs_wait_ordered_range(inode, inode->i_size & (~mask),
+ (u64)-1);
+ if (ret)
+ return ret;
/*
* Yes ladies and gentelment, this is indeed ugly. The fact is we have
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 1a36a0c..bbb1a38 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -734,8 +734,9 @@
/*
* Used to wait on ordered extents across a large range of bytes.
*/
-void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
+int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
{
+ int ret = 0;
u64 end;
u64 orig_end;
struct btrfs_ordered_extent *ordered;
@@ -751,8 +752,9 @@
/* start IO across the range first to instantiate any delalloc
* extents
*/
- filemap_fdatawrite_range(inode->i_mapping, start, orig_end);
-
+ ret = filemap_fdatawrite_range(inode->i_mapping, start, orig_end);
+ if (ret)
+ return ret;
/*
* So with compression we will find and lock a dirty page and clear the
* first one as dirty, setup an async extent, and immediately return
@@ -768,10 +770,15 @@
* right and you are wrong.
*/
if (test_bit(BTRFS_INODE_HAS_ASYNC_EXTENT,
- &BTRFS_I(inode)->runtime_flags))
- filemap_fdatawrite_range(inode->i_mapping, start, orig_end);
-
- filemap_fdatawait_range(inode->i_mapping, start, orig_end);
+ &BTRFS_I(inode)->runtime_flags)) {
+ ret = filemap_fdatawrite_range(inode->i_mapping, start,
+ orig_end);
+ if (ret)
+ return ret;
+ }
+ ret = filemap_fdatawait_range(inode->i_mapping, start, orig_end);
+ if (ret)
+ return ret;
end = orig_end;
while (1) {
@@ -788,11 +795,14 @@
}
btrfs_start_ordered_extent(inode, ordered, 1);
end = ordered->file_offset;
+ if (test_bit(BTRFS_ORDERED_IOERR, &ordered->flags))
+ ret = -EIO;
btrfs_put_ordered_extent(ordered);
- if (end == 0 || end == start)
+ if (ret || end == 0 || end == start)
break;
end--;
}
+ return ret;
}
/*
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index 0c0b356..3982db1 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -180,7 +180,7 @@
u64 file_offset);
void btrfs_start_ordered_extent(struct inode *inode,
struct btrfs_ordered_extent *entry, int wait);
-void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
+int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
struct btrfs_ordered_extent *
btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset);
struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode,
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index a945374..729c91e 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -4257,7 +4257,12 @@
rc->extents_found);
if (rc->stage == MOVE_DATA_EXTENTS && rc->found_file_extent) {
- btrfs_wait_ordered_range(rc->data_inode, 0, (u64)-1);
+ ret = btrfs_wait_ordered_range(rc->data_inode, 0,
+ (u64)-1);
+ if (ret) {
+ err = ret;
+ goto out;
+ }
invalidate_mapping_pages(rc->data_inode->i_mapping,
0, -1);
rc->stage = UPDATE_DATA_PTRS;
