btrfs: do not infinite loop in data reclaim if we aborted

Error injection stressing uncovered a busy loop in our data reclaim
loop.  We will simply loop to create block groups until we have
space_info->full set or no tickets.  Unfortunately if we aborted the
transaction then we will never allocate chunks and thus never get
->full, and you'll see stack traces like this

watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [kworker/u4:4:139]
CPU: 0 PID: 139 Comm: kworker/u4:4 Tainted: G        W         5.13.0-rc1+ torvalds#328
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
Workqueue: events_unbound btrfs_async_reclaim_data_space
RIP: 0010:btrfs_join_transaction+0x12/0x20
RSP: 0018:ffffb2b780b77de0 EFLAGS: 00000246
RAX: ffffb2b781863d58 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000801 RSI: ffff987952b57400 RDI: ffff987940aa3000
RBP: ffff987954d55000 R08: 0000000000000001 R09: ffff98795539e8f0
R10: 000000000000000f R11: 000000000000000f R12: ffffffffffffffff
R13: ffff987952b574c8 R14: ffff987952b57400 R15: 0000000000000008
FS:  0000000000000000(0000) GS:ffff9879bbc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0703da4000 CR3: 0000000113398004 CR4: 0000000000370ef0
Call Trace:
 flush_space+0x4a8/0x660
 btrfs_async_reclaim_data_space+0x55/0x130
 process_one_work+0x1e9/0x380
 worker_thread+0x53/0x3e0
 ? process_one_work+0x380/0x380
 kthread+0x118/0x140
 ? __kthread_bind_mask+0x60/0x60
 ret_from_fork+0x1f/0x30

Fix this by also checking if we have BTRFS_FS_STATE_TRANS_ABORTED set on
the fs_info and bail out accordingly.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/space-info.c

@@ -1248,7 +1248,9 @@ static void btrfs_async_reclaim_data_space(struct work_struct *work)
 	while (!space_info->full) {
 		flush_space(fs_info, space_info, U64_MAX, ALLOC_CHUNK_FORCE, false);
 		spin_lock(&space_info->lock);
-		if (list_empty(&space_info->tickets)) {
+		if (list_empty(&space_info->tickets) ||
+		    test_bit(BTRFS_FS_STATE_TRANS_ABORTED,
+			     &fs_info->fs_state)) {
 			space_info->flush = 0;
 			spin_unlock(&space_info->lock);
 			return;