Btrfs: seperate out btrfs_block_rsv_check out into 2 different functions

Currently btrfs_block_rsv_check does 2 things, it will either refill a block
reserve like in the truncate or refill case, or it will check to see if there is
enough space in the global reserve and possibly refill it.  However because of
overcommit we could be well overcommitting ourselves just to try and refill the
global reserve, when really we should just be committing the transaction.  So
breack this out into btrfs_block_rsv_refill and btrfs_block_rsv_check.  Refill
will try to reserve more metadata if it can and btrfs_block_rsv_check will not,
it will only tell you if the factor of the total space is still reserved.
Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b6b70bdd0992..f12747c9447b 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3604,7 +3604,7 @@ void btrfs_evict_inode(struct inode *inode)
          * doing the truncate.
          */
         while (1) {
-                ret = btrfs_block_rsv_check(root, rsv, min_size, 0, 1);
+                ret = btrfs_block_rsv_refill(root, rsv, min_size);
 
                 /*
                  * Try and steal from the global reserve since we will
@@ -6613,7 +6613,7 @@ static int btrfs_truncate(struct inode *inode)
                 btrfs_add_ordered_operation(trans, root, inode);
 
         while (1) {
-                ret = btrfs_block_rsv_check(root, rsv, min_size, 0, 1);
+                ret = btrfs_block_rsv_refill(root, rsv, min_size);
                 if (ret) {
                         /*
                          * This can only happen with the original transaction we