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| author | Josef Bacik <jbacik@fb.com> | 2016-05-27 13:08:26 -0400 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2016-07-07 18:45:53 +0200 |
| commit | ac2fabac4211431b607b326c2233e73b81e86af2 (patch) | |
| tree | ae893ce479dfd9ae522322e890ef105fb7acd14a /fs/btrfs/relocation.c | |
| parent | 40acc3eededbe16f6104a32776e541f223d00b5e (diff) | |
| download | linux-0-day-ac2fabac4211431b607b326c2233e73b81e86af2.tar.gz linux-0-day-ac2fabac4211431b607b326c2233e73b81e86af2.tar.xz | |
Btrfs: fill relocation block rsv after allocation
Since we set the reloc control before we've reserved our space for relocation we
could race with a root being dirtied and not actually have space to do our init
reloc root. So once we've allocated it and set it up go ahead and make our
reservation before setting the relocate control, that way anybody who tries to
do the reloc root init has space to use. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/relocation.c')
| -rw-r--r-- | fs/btrfs/relocation.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 0bf3bc8795037..23e16de52e23b 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -3871,6 +3871,7 @@ static noinline_for_stack int prepare_to_relocate(struct reloc_control *rc) { struct btrfs_trans_handle *trans; + int ret; rc->block_rsv = btrfs_alloc_block_rsv(rc->extent_root, BTRFS_BLOCK_RSV_TEMP); @@ -3885,6 +3886,11 @@ int prepare_to_relocate(struct reloc_control *rc) rc->reserved_bytes = 0; rc->block_rsv->size = rc->extent_root->nodesize * RELOCATION_RESERVED_NODES; + ret = btrfs_block_rsv_refill(rc->extent_root, + rc->block_rsv, rc->block_rsv->size, + BTRFS_RESERVE_FLUSH_ALL); + if (ret) + return ret; rc->create_reloc_tree = 1; set_reloc_control(rc); |