[ get_avail_device() sometimes returns an ERR_PTR ]
Hi Liu,
FYI, there are new smatch warnings show up in
tree: git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git
master
head: 3d294381647ab114f525a0ccf3d28f8172ce6a5f
commit: 3d294381647ab114f525a0ccf3d28f8172ce6a5f [21/21] Btrfs: resize all
devices when we dont assign a specific, device id
fs/btrfs/ioctl.c:386 create_subvol() warn: function puts 544 bytes on stack
+ fs/btrfs/ioctl.c:1436 btrfs_ioctl_resize() error: 'device' dereferencing
possible ERR_PTR()
git remote add josef-btrfs
git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git
git remote update josef-btrfs
git checkout 3d294381647ab114f525a0ccf3d28f8172ce6a5f
vim +/device +1436 fs/btrfs/ioctl.c
3d294381 Liu Bo 2012-12-20 1420 ret = -EINVAL;
3d294381 Liu Bo 2012-12-20 1421 goto out_free;
3d294381 Liu Bo 2012-12-20 1422 }
3d294381 Liu Bo 2012-12-20 1423 }
3d294381 Liu Bo 2012-12-20 1424
3d294381 Liu Bo 2012-12-20 1425 if (devid < -1ULL)
3d294381 Liu Bo 2012-12-20 1426 device =
btrfs_find_device(root->fs_info, devid, NULL, NULL);
3d294381 Liu Bo 2012-12-20 1427 else
3d294381 Liu Bo 2012-12-20 1428 device =
get_avail_device(root, 0);
3d294381 Liu Bo 2012-12-20 1429 again:
f46b5a66 Christoph Hellwig 2008-06-11 1430 if (!device) {
5bb14682 Arnd Hannemann 2011-11-20 1431 printk(KERN_INFO
"btrfs: resizer unable to find device %llu\n",
21380931 Joel Becker 2009-04-21 1432 (unsigned long
long)devid);
f46b5a66 Christoph Hellwig 2008-06-11 1433 ret = -EINVAL;
c9e9f97b Ilya Dryomov 2012-01-16 1434 goto out_free;
f46b5a66 Christoph Hellwig 2008-06-11 1435 }
4e42ae1b Liu Bo 2012-06-14 @1436 if (device->fs_devices &&
device->fs_devices->seeding) {
4e42ae1b Liu Bo 2012-06-14 1437 printk(KERN_INFO
"btrfs: resizer unable to apply on "
a8c4a33b Chris Mason 2012-06-15 1438 "seeding device
%llu\n",
a8c4a33b Chris Mason 2012-06-15 1439 (unsigned long
long)devid);
4e42ae1b Liu Bo 2012-06-14 1440 ret = -EINVAL;
4e42ae1b Liu Bo 2012-06-14 1441 goto out_free;
4e42ae1b Liu Bo 2012-06-14 1442 }
4e42ae1b Liu Bo 2012-06-14 1443
3d294381 Liu Bo 2012-12-20 1444 if (use_max)
---
0-DAY kernel build testing backend Open Source Technology Center
Fengguang Wu, Yuanhan Liu Intel Corporation
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