{
struct btrfs_root *root = inode->root;
struct btrfs_fs_info *fs_info = root->fs_info;
- struct btrfs_space_info *data_sinfo = fs_info->data_sinfo;
- u64 used;
- int ret = 0;
- int need_commit = 2;
- int have_pinned_space;
+ enum btrfs_reserve_flush_enum flush = BTRFS_RESERVE_FLUSH_DATA;
/* Make sure bytes are sectorsize aligned */
bytes = ALIGN(bytes, fs_info->sectorsize);
- if (btrfs_is_free_space_inode(inode)) {
- need_commit = 0;
- ASSERT(current->journal_info);
- }
-
-again:
- /* Make sure we have enough space to handle the data first */
- spin_lock(&data_sinfo->lock);
- used = btrfs_space_info_used(data_sinfo, true);
-
- if (used + bytes > data_sinfo->total_bytes) {
- struct btrfs_trans_handle *trans;
-
- /*
- * If we don't have enough free bytes in this space then we need
- * to alloc a new chunk.
- */
- if (!data_sinfo->full) {
- u64 alloc_target;
-
- data_sinfo->force_alloc = CHUNK_ALLOC_FORCE;
- spin_unlock(&data_sinfo->lock);
-
- alloc_target = btrfs_data_alloc_profile(fs_info);
- /*
- * It is ugly that we don't call nolock join
- * transaction for the free space inode case here.
- * But it is safe because we only do the data space
- * reservation for the free space cache in the
- * transaction context, the common join transaction
- * just increase the counter of the current transaction
- * handler, doesn't try to acquire the trans_lock of
- * the fs.
- */
- trans = btrfs_join_transaction(root);
- if (IS_ERR(trans))
- return PTR_ERR(trans);
-
- ret = btrfs_chunk_alloc(trans, alloc_target,
- CHUNK_ALLOC_NO_FORCE);
- btrfs_end_transaction(trans);
- if (ret < 0) {
- if (ret != -ENOSPC)
- return ret;
- else {
- have_pinned_space = 1;
- goto commit_trans;
- }
- }
-
- goto again;
- }
-
- /*
- * If we don't have enough pinned space to deal with this
- * allocation, and no removed chunk in current transaction,
- * don't bother committing the transaction.
- */
- have_pinned_space = __percpu_counter_compare(
- &data_sinfo->total_bytes_pinned,
- used + bytes - data_sinfo->total_bytes,
- BTRFS_TOTAL_BYTES_PINNED_BATCH);
- spin_unlock(&data_sinfo->lock);
-
- /* Commit the current transaction and try again */
-commit_trans:
- if (need_commit) {
- need_commit--;
-
- if (need_commit > 0) {
- btrfs_start_delalloc_roots(fs_info, -1);
- btrfs_wait_ordered_roots(fs_info, U64_MAX, 0,
- (u64)-1);
- }
-
- trans = btrfs_join_transaction(root);
- if (IS_ERR(trans))
- return PTR_ERR(trans);
- if (have_pinned_space >= 0 ||
- test_bit(BTRFS_TRANS_HAVE_FREE_BGS,
- &trans->transaction->flags) ||
- need_commit > 0) {
- ret = btrfs_commit_transaction(trans);
- if (ret)
- return ret;
- /*
- * The cleaner kthread might still be doing iput
- * operations. Wait for it to finish so that
- * more space is released. We don't need to
- * explicitly run the delayed iputs here because
- * the commit_transaction would have woken up
- * the cleaner.
- */
- ret = btrfs_wait_on_delayed_iputs(fs_info);
- if (ret)
- return ret;
- goto again;
- } else {
- btrfs_end_transaction(trans);
- }
- }
-
- trace_btrfs_space_reservation(fs_info,
- "space_info:enospc",
- data_sinfo->flags, bytes, 1);
- return -ENOSPC;
- }
- btrfs_space_info_update_bytes_may_use(fs_info, data_sinfo, bytes);
- spin_unlock(&data_sinfo->lock);
+ if (btrfs_is_free_space_inode(inode))
+ flush = BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE;
- return 0;
+ return btrfs_reserve_data_bytes(fs_info, bytes, flush);
}
int btrfs_check_data_free_space(struct btrfs_inode *inode,
ASSERT(IS_ALIGNED(len, fs_info->sectorsize));
data_sinfo = fs_info->data_sinfo;
- spin_lock(&data_sinfo->lock);
- btrfs_space_info_update_bytes_may_use(fs_info, data_sinfo, -len);
- spin_unlock(&data_sinfo->lock);
+ btrfs_space_info_free_bytes_may_use(fs_info, data_sinfo, len);
}
/*
projects / linux-2.6-microblaze.git / blobdiff