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Match the extent tree code to btrfs-progs for multi-device merging

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-03-24 15:01:28 -04:00
parent eb20978f31
commit 7f93bf8d27
1 changed files with 7 additions and 52 deletions
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59
fs/btrfs/extent-tree.c
View file

@ -209,27 +209,22 @@ again:
last = max(search_start, cache->key.objectid);
spin_lock_irq(&free_space_cache->lock);
state = find_first_extent_bit_state(free_space_cache, last, EXTENT_DIRTY);
while(1) {
if (!state) {
ret = find_first_extent_bit(&root->fs_info->free_space_cache,
last, &start, &end, EXTENT_DIRTY);
if (ret) {
if (!cache_miss)
cache_miss = last;
spin_unlock_irq(&free_space_cache->lock);
goto new_group;
}
start = max(last, state->start);
last = state->end + 1;
start = max(last, start);
last = end + 1;
if (last - start < num) {
if (last == cache->key.objectid + cache->key.offset)
cache_miss = start;
do {
state = extent_state_next(state);
} while(state && !(state->state & EXTENT_DIRTY));
continue;
}
spin_unlock_irq(&free_space_cache->lock);
if (data != BTRFS_BLOCK_GROUP_MIXED &&
start + num > cache->key.objectid + cache->key.offset)
goto new_group;
@ -1485,29 +1480,8 @@ static int noinline find_free_extent(struct btrfs_trans_handle *trans,
data = BTRFS_BLOCK_GROUP_MIXED;
}
if (!data) {
last_ptr = &root->fs_info->last_alloc;
empty_cluster = 128 * 1024;
}
if (data && btrfs_test_opt(root, SSD)) {
last_ptr = &root->fs_info->last_data_alloc;
empty_cluster = 2 * 1024 * 1024;
}
if (last_ptr) {
if (*last_ptr)
hint_byte = *last_ptr;
else {
hint_byte = hint_byte &
~((u64)BTRFS_BLOCK_GROUP_SIZE - 1);
empty_size += empty_cluster;
}
search_start = max(search_start, hint_byte);
}
search_end = min(search_end,
btrfs_super_total_bytes(&info->super_copy));
if (search_end == (u64)-1)
search_end = btrfs_super_total_bytes(&info->super_copy);
if (hint_byte) {
block_group = btrfs_lookup_block_group(info, hint_byte);
if (!block_group)
@ -1531,18 +1505,6 @@ check_failed:
}
search_start = find_search_start(root, &block_group, search_start,
total_needed, data);
if (last_ptr && *last_ptr && search_start != *last_ptr) {
*last_ptr = 0;
if (!empty_size) {
empty_size += empty_cluster;
total_needed += empty_size;
}
search_start = find_search_start(root, &block_group,
search_start, total_needed,
data);
}
search_start = stripe_align(root, search_start);
cached_start = search_start;
btrfs_init_path(path);
@ -1670,13 +1632,6 @@ check_pending:
}
ins->offset = num_bytes;
btrfs_free_path(path);
if (last_ptr) {
*last_ptr = ins->objectid + ins->offset;
if (*last_ptr ==
btrfs_super_total_bytes(&root->fs_info->super_copy)) {
*last_ptr = 0;
}
}
return 0;
new_group: