#include <stdio.h>
#include <stdlib.h>
+#include <stdint.h>
+#include <math.h>
#include "kerncompat.h"
#include "radix-tree.h"
#include "ctree.h"
#include "transaction.h"
#include "crc32c.h"
#include "volumes.h"
-
-#define BLOCK_GROUP_DATA EXTENT_WRITEBACK
-#define BLOCK_GROUP_METADATA EXTENT_UPTODATE
-#define BLOCK_GROUP_SYSTEM EXTENT_NEW
-
-#define BLOCK_GROUP_DIRTY EXTENT_DIRTY
+#include "free-space-cache.h"
+#include "utils.h"
#define PENDING_EXTENT_INSERT 0
#define PENDING_EXTENT_DELETE 1
btrfs_root *extent_root);
static int del_pending_extents(struct btrfs_trans_handle *trans, struct
btrfs_root *extent_root);
+static struct btrfs_block_group_cache *
+btrfs_find_block_group(struct btrfs_root *root, struct btrfs_block_group_cache
+ *hint, u64 search_start, int data, int owner);
static int remove_sb_from_cache(struct btrfs_root *root,
struct btrfs_block_group_cache *cache)
last = max_t(u64, block_group->key.objectid, BTRFS_SUPER_INFO_OFFSET);
key.objectid = last;
key.offset = 0;
- btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
+ key.type = 0;
+
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto err;
break;
}
- if (btrfs_key_type(&key) == BTRFS_EXTENT_ITEM_KEY) {
+ if (key.type == BTRFS_EXTENT_ITEM_KEY ||
+ key.type == BTRFS_METADATA_ITEM_KEY) {
if (key.objectid > last) {
hole_size = key.objectid - last;
set_extent_dirty(free_space_cache, last,
last + hole_size - 1,
GFP_NOFS);
}
- last = key.objectid + key.offset;
+ if (key.type == BTRFS_METADATA_ITEM_KEY)
+ last = key.objectid + root->leafsize;
+ else
+ last = key.objectid + key.offset;
}
next:
path->slots[0]++;
{
int ret;
struct btrfs_block_group_cache *cache = *cache_ret;
- u64 last;
+ u64 last = *start_ret;
u64 start = 0;
u64 end = 0;
u64 search_start = *start_ret;
int wrapped = 0;
- if (!cache) {
+ if (!cache)
goto out;
- }
again:
ret = cache_block_group(root, cache);
if (ret)
goto out;
last = max(search_start, cache->key.objectid);
- if (cache->ro || !block_group_bits(cache, data)) {
+ if (cache->ro || !block_group_bits(cache, data))
goto new_group;
- }
while(1) {
ret = find_first_extent_bit(&root->fs_info->free_space_cache,
return 0;
}
out:
+ *start_ret = last;
cache = btrfs_lookup_block_group(root->fs_info, search_start);
if (!cache) {
printk("Unable to find block group for %llu\n",
wrapped:
cache = btrfs_lookup_first_block_group(root->fs_info, last);
if (!cache) {
-no_cache:
if (!wrapped) {
wrapped = 1;
last = search_start;
}
goto out;
}
- cache = btrfs_find_block_group(root, cache, last, data, 0);
- cache = btrfs_find_block_group(root, cache, last, data, 0);
- if (!cache)
- goto no_cache;
-
*cache_ret = cache;
goto again;
}
-static u64 div_factor(u64 num, int factor)
-{
- if (factor == 10)
- return num;
- num *= factor;
- num /= 10;
- return num;
-}
-
static int block_group_state_bits(u64 flags)
{
int bits = 0;
return bits;
}
-struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
- struct btrfs_block_group_cache
- *hint, u64 search_start,
- int data, int owner)
+static struct btrfs_block_group_cache *
+btrfs_find_block_group(struct btrfs_root *root, struct btrfs_block_group_cache
+ *hint, u64 search_start, int data, int owner)
{
struct btrfs_block_group_cache *cache;
struct extent_io_tree *block_group_cache;
break;
}
}
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
if (owner < BTRFS_FIRST_FREE_OBJECTID)
new_size += sizeof(*bi);
return 0;
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
key.type = BTRFS_EXTENT_REF_V0_KEY;
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0) {
err = ret;
if (match_extent_data_ref(leaf, ref, root_objectid,
owner, offset)) {
if (recow) {
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
goto again;
}
err = 0;
if (match_extent_data_ref(leaf, ref, root_objectid,
owner, offset))
break;
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
key.offset++;
ret = btrfs_insert_empty_item(trans, root, path, &key,
btrfs_mark_buffer_dirty(leaf);
ret = 0;
fail:
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
return ret;
}
ret = -ENOENT;
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
if (ret == -ENOENT && parent) {
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
key.type = BTRFS_EXTENT_REF_V0_KEY;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret > 0)
ret = btrfs_insert_empty_item(trans, root, path, &key, 0);
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
return ret;
}
static inline int extent_ref_type(u64 parent, u64 owner)
{
+ int type;
if (owner < BTRFS_FIRST_FREE_OBJECTID) {
if (parent > 0)
- return BTRFS_SHARED_BLOCK_REF_KEY;
+ type = BTRFS_SHARED_BLOCK_REF_KEY;
else
- return BTRFS_TREE_BLOCK_REF_KEY;
+ type = BTRFS_TREE_BLOCK_REF_KEY;
} else {
if (parent > 0)
- return BTRFS_SHARED_DATA_REF_KEY;
+ type = BTRFS_SHARED_DATA_REF_KEY;
else
- return BTRFS_EXTENT_DATA_REF_KEY;
+ type = BTRFS_EXTENT_DATA_REF_KEY;
}
-}
-
-static int find_next_key(struct btrfs_path *path, struct btrfs_key *key)
-
-{
- int level;
- for (level = 0; level < BTRFS_MAX_LEVEL; level++) {
- if (!path->nodes[level])
- break;
- if (path->slots[level] + 1 >=
- btrfs_header_nritems(path->nodes[level]))
- continue;
- if (level == 0)
- btrfs_item_key_to_cpu(path->nodes[level], key,
- path->slots[level] + 1);
- else
- btrfs_node_key_to_cpu(path->nodes[level], key,
- path->slots[level] + 1);
- return 0;
- }
- return 1;
+ return type;
}
static int lookup_inline_extent_backref(struct btrfs_trans_handle *trans,
int want;
int ret;
int err = 0;
+ int skinny_metadata =
+ btrfs_fs_incompat(root->fs_info,
+ BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
key.objectid = bytenr;
key.type = BTRFS_EXTENT_ITEM_KEY;
extra_size = btrfs_extent_inline_ref_size(want);
else
extra_size = -1;
+
+ if (owner < BTRFS_FIRST_FREE_OBJECTID && skinny_metadata) {
+ skinny_metadata = 1;
+ key.type = BTRFS_METADATA_ITEM_KEY;
+ key.offset = owner;
+ } else if (skinny_metadata) {
+ skinny_metadata = 0;
+ }
+
+again:
ret = btrfs_search_slot(trans, root, &key, path, extra_size, 1);
if (ret < 0) {
err = ret;
goto out;
}
+
+ /*
+ * We may be a newly converted file system which still has the old fat
+ * extent entries for metadata, so try and see if we have one of those.
+ */
+ if (ret > 0 && skinny_metadata) {
+ skinny_metadata = 0;
+ if (path->slots[0]) {
+ path->slots[0]--;
+ btrfs_item_key_to_cpu(path->nodes[0], &key,
+ path->slots[0]);
+ if (key.objectid == bytenr &&
+ key.type == BTRFS_EXTENT_ITEM_KEY &&
+ key.offset == num_bytes)
+ ret = 0;
+ }
+ if (ret) {
+ key.type = BTRFS_EXTENT_ITEM_KEY;
+ key.offset = num_bytes;
+ btrfs_release_path(path);
+ goto again;
+ }
+ }
+
+ if (ret) {
+ printf("Failed to find [%llu, %u, %llu]\n", key.objectid, key.type, key.offset);
+ return -ENOENT;
+ }
+
BUG_ON(ret);
leaf = path->nodes[0];
item_size = btrfs_item_size_nr(leaf, path->slots[0]);
}
#endif
- BUG_ON(item_size < sizeof(*ei));
-
- if (owner < BTRFS_FIRST_FREE_OBJECTID && insert &&
- item_size + extra_size >= BTRFS_MAX_EXTENT_ITEM_SIZE(root)) {
- err = -EAGAIN;
- goto out;
+ if (item_size < sizeof(*ei)) {
+ printf("Size is %u, needs to be %u, slot %d\n",
+ (unsigned)item_size,
+ (unsigned)sizeof(*ei), path->slots[0]);
+ btrfs_print_leaf(root, leaf);
+ return -EINVAL;
}
+ BUG_ON(item_size < sizeof(*ei));
ei = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
flags = btrfs_extent_flags(leaf, ei);
ptr = (unsigned long)(ei + 1);
end = (unsigned long)ei + item_size;
- if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
+ if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !skinny_metadata) {
ptr += sizeof(struct btrfs_tree_block_info);
BUG_ON(ptr > end);
- } else {
- BUG_ON(!(flags & BTRFS_EXTENT_FLAG_DATA));
+ } else if (!(flags & BTRFS_EXTENT_FLAG_TREE_BLOCK)) {
+ if (!(flags & BTRFS_EXTENT_FLAG_DATA)) {
+ return -EIO;
+ }
}
err = -ENOENT;
* For simplicity, we just do not add new inline back
* ref if there is any back ref item.
*/
- if (owner >= BTRFS_FIRST_FREE_OBJECTID &&
- find_next_key(path, &key) == 0 && key.objectid == bytenr) {
+ if (find_next_key(path, &key) == 0 && key.objectid == bytenr &&
+ key.type < BTRFS_BLOCK_GROUP_ITEM_KEY) {
err = -EAGAIN;
goto out;
}
if (ret != -ENOENT)
return ret;
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
*ref_ret = NULL;
if (owner < BTRFS_FIRST_FREE_OBJECTID) {
return -ENOMEM;
path->reada = 1;
- path->leave_spinning = 1;
ret = insert_inline_extent_backref(trans, root->fs_info->extent_root,
path, bytenr, num_bytes, parent,
btrfs_set_extent_refs(leaf, item, refs + 1);
btrfs_mark_buffer_dirty(leaf);
- btrfs_release_path(root->fs_info->extent_root, path);
+ btrfs_release_path(path);
path->reada = 1;
- path->leave_spinning = 1;
/* now insert the actual backref */
ret = insert_extent_backref(trans, root->fs_info->extent_root,
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 bytenr,
- u64 num_bytes, u64 *refs, u64 *flags)
+ u64 offset, int metadata, u64 *refs, u64 *flags)
{
struct btrfs_path *path;
int ret;
u64 num_refs;
u64 extent_flags;
- WARN_ON(num_bytes < root->sectorsize);
+ if (metadata &&
+ !btrfs_fs_incompat(root->fs_info,
+ BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)) {
+ offset = root->leafsize;
+ metadata = 0;
+ }
+
path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
path->reada = 1;
+
key.objectid = bytenr;
- key.offset = num_bytes;
- btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
+ key.offset = offset;
+ if (metadata)
+ key.type = BTRFS_METADATA_ITEM_KEY;
+ else
+ key.type = BTRFS_EXTENT_ITEM_KEY;
+
+again:
ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path,
0, 0);
if (ret < 0)
goto out;
+
+ /*
+ * Deal with the fact that we may have mixed SKINNY and normal refs. If
+ * we didn't find what we wanted check and see if we have a normal ref
+ * right next to us, or re-search if we are on the edge of the leaf just
+ * to make sure.
+ */
+ if (ret > 0 && metadata) {
+ if (path->slots[0]) {
+ path->slots[0]--;
+ btrfs_item_key_to_cpu(path->nodes[0], &key,
+ path->slots[0]);
+ if (key.objectid == bytenr &&
+ key.type == BTRFS_EXTENT_ITEM_KEY &&
+ key.offset == root->leafsize)
+ ret = 0;
+ }
+
+ if (ret) {
+ btrfs_release_path(path);
+ key.type = BTRFS_EXTENT_ITEM_KEY;
+ key.offset = root->leafsize;
+ metadata = 0;
+ goto again;
+ }
+ }
+
if (ret != 0) {
- btrfs_print_leaf(root, path->nodes[0]);
- printk("failed to find block number %Lu\n", bytenr);
- BUG();
+ ret = -EIO;
+ goto out;
}
l = path->nodes[0];
extent_flags = BTRFS_BLOCK_FLAG_FULL_BACKREF;
#else
BUG();
-#endif
- }
- BUG_ON(num_refs == 0);
+#endif
+ }
item = btrfs_item_ptr(l, path->slots[0], struct btrfs_extent_item);
if (refs)
*refs = num_refs;
*flags = extent_flags;
out:
btrfs_free_path(path);
- return 0;
+ return ret;
}
int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
- u64 bytenr, u64 num_bytes, u64 flags)
+ u64 bytenr, int level, u64 flags)
{
struct btrfs_path *path;
int ret;
struct extent_buffer *l;
struct btrfs_extent_item *item;
u32 item_size;
+ int skinny_metadata =
+ btrfs_fs_incompat(root->fs_info,
+ BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
- WARN_ON(num_bytes < root->sectorsize);
path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
path->reada = 1;
+
key.objectid = bytenr;
- key.offset = num_bytes;
- btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
+ if (skinny_metadata) {
+ key.offset = level;
+ key.type = BTRFS_METADATA_ITEM_KEY;
+ } else {
+ key.offset = root->leafsize;
+ key.type = BTRFS_EXTENT_ITEM_KEY;
+ }
+
+again:
ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path,
0, 0);
if (ret < 0)
goto out;
+
+ if (ret > 0 && skinny_metadata) {
+ skinny_metadata = 0;
+ if (path->slots[0]) {
+ path->slots[0]--;
+ btrfs_item_key_to_cpu(path->nodes[0], &key,
+ path->slots[0]);
+ if (key.objectid == bytenr &&
+ key.offset == root->leafsize &&
+ key.type == BTRFS_EXTENT_ITEM_KEY)
+ ret = 0;
+ }
+ if (ret) {
+ btrfs_release_path(path);
+ key.offset = root->leafsize;
+ key.type = BTRFS_EXTENT_ITEM_KEY;
+ goto again;
+ }
+ }
+
if (ret != 0) {
btrfs_print_leaf(root, path->nodes[0]);
printk("failed to find block number %Lu\n",
int i;
int level;
int ret = 0;
- int faili = 0;
int (*process_func)(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64, u64, u64, u64, u64, u64);
parent, ref_root, key.objectid,
key.offset);
if (ret) {
- faili = i;
WARN_ON(1);
goto fail;
}
ret = process_func(trans, root, bytenr, num_bytes,
parent, ref_root, level - 1, 0);
if (ret) {
- faili = i;
WARN_ON(1);
goto fail;
}
return 0;
fail:
WARN_ON(1);
-#if 0
- for (i =0; i < faili; i++) {
- if (level == 0) {
- u64 disk_bytenr;
- btrfs_item_key_to_cpu(buf, &key, i);
- if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY)
- continue;
- fi = btrfs_item_ptr(buf, i,
- struct btrfs_file_extent_item);
- if (btrfs_file_extent_type(buf, fi) ==
- BTRFS_FILE_EXTENT_INLINE)
- continue;
- disk_bytenr = btrfs_file_extent_disk_bytenr(buf, fi);
- if (disk_bytenr == 0)
- continue;
- err = btrfs_free_extent(trans, root, disk_bytenr,
- btrfs_file_extent_disk_num_bytes(buf,
- fi), 0);
- BUG_ON(err);
- } else {
- bytenr = btrfs_node_blockptr(buf, i);
- err = btrfs_free_extent(trans, root, bytenr,
- btrfs_level_size(root, level - 1), 0);
- BUG_ON(err);
- }
- }
-#endif
return ret;
}
bi = btrfs_item_ptr_offset(leaf, path->slots[0]);
write_extent_buffer(leaf, &cache->item, bi, sizeof(cache->item));
btrfs_mark_buffer_dirty(leaf);
- btrfs_release_path(extent_root, path);
+ btrfs_release_path(path);
fail:
finish_current_insert(trans, extent_root);
pending_ret = del_pending_extents(trans, extent_root);
struct extent_io_tree *block_group_cache;
struct btrfs_block_group_cache *cache;
int ret;
- int err = 0;
- int werr = 0;
struct btrfs_path *path;
u64 last = 0;
u64 start;
while(1) {
ret = find_first_extent_bit(block_group_cache, last,
&start, &end, BLOCK_GROUP_DIRTY);
- if (ret)
- break;
+ if (ret) {
+ if (last == 0)
+ break;
+ last = 0;
+ continue;
+ }
last = end + 1;
ret = get_state_private(block_group_cache, start, &ptr);
- if (ret)
- break;
- cache = (struct btrfs_block_group_cache *)(unsigned long)ptr;
- err = write_one_cache_group(trans, root,
- path, cache);
- /*
- * if we fail to write the cache group, we want
- * to keep it marked dirty in hopes that a later
- * write will work
- */
- if (err) {
- werr = err;
- continue;
- }
+ BUG_ON(ret);
+
clear_extent_bits(block_group_cache, start, end,
BLOCK_GROUP_DIRTY, GFP_NOFS);
+
+ cache = (struct btrfs_block_group_cache *)(unsigned long)ptr;
+ ret = write_one_cache_group(trans, root, path, cache);
}
btrfs_free_path(path);
- return werr;
+ return 0;
}
static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info,
u64 flags)
{
- struct list_head *head = &info->space_info;
- struct list_head *cur;
struct btrfs_space_info *found;
- list_for_each(cur, head) {
- found = list_entry(cur, struct btrfs_space_info, list);
- if (found->flags == flags)
+
+ flags &= BTRFS_BLOCK_GROUP_TYPE_MASK;
+
+ list_for_each_entry(found, &info->space_info, list) {
+ if (found->flags & flags)
return found;
}
return NULL;
}
+static int free_space_info(struct btrfs_fs_info *fs_info, u64 flags,
+ u64 total_bytes, u64 bytes_used,
+ struct btrfs_space_info **space_info)
+{
+ struct btrfs_space_info *found;
+
+ /* only support free block group which is empty */
+ if (bytes_used)
+ return -ENOTEMPTY;
+
+ found = __find_space_info(fs_info, flags);
+ if (!found)
+ return -ENOENT;
+ if (found->total_bytes < total_bytes) {
+ fprintf(stderr,
+ "WARNING: bad space info to free %llu only have %llu\n",
+ total_bytes, found->total_bytes);
+ return -EINVAL;
+ }
+ found->total_bytes -= total_bytes;
+ if (space_info)
+ *space_info = found;
+ return 0;
+}
+
static int update_space_info(struct btrfs_fs_info *info, u64 flags,
u64 total_bytes, u64 bytes_used,
struct btrfs_space_info **space_info)
if (found) {
found->total_bytes += total_bytes;
found->bytes_used += bytes_used;
- WARN_ON(found->total_bytes < found->bytes_used);
+ if (found->total_bytes < found->bytes_used) {
+ fprintf(stderr, "warning, bad space info total_bytes "
+ "%llu used %llu\n",
+ (unsigned long long)found->total_bytes,
+ (unsigned long long)found->bytes_used);
+ }
*space_info = found;
return 0;
}
return -ENOMEM;
list_add(&found->list, &info->space_info);
- found->flags = flags;
+ found->flags = flags & BTRFS_BLOCK_GROUP_TYPE_MASK;
found->total_bytes = total_bytes;
found->bytes_used = bytes_used;
found->bytes_pinned = 0;
{
u64 extra_flags = flags & (BTRFS_BLOCK_GROUP_RAID0 |
BTRFS_BLOCK_GROUP_RAID1 |
+ BTRFS_BLOCK_GROUP_RAID10 |
+ BTRFS_BLOCK_GROUP_RAID5 |
+ BTRFS_BLOCK_GROUP_RAID6 |
BTRFS_BLOCK_GROUP_DUP);
if (extra_flags) {
if (flags & BTRFS_BLOCK_GROUP_DATA)
thresh)
return 0;
- ret = btrfs_alloc_chunk(trans, extent_root, &start, &num_bytes, flags);
+ ret = btrfs_alloc_chunk(trans, extent_root, &start, &num_bytes,
+ space_info->flags);
if (ret == -ENOSPC) {
space_info->full = 1;
return 0;
BUG_ON(ret);
- ret = btrfs_make_block_group(trans, extent_root, 0, flags,
+ ret = btrfs_make_block_group(trans, extent_root, 0, space_info->flags,
BTRFS_FIRST_CHUNK_TREE_OBJECTID, start, num_bytes);
BUG_ON(ret);
return 0;
u64 end;
/* block accounting for super block */
- old_val = btrfs_super_bytes_used(&info->super_copy);
+ old_val = btrfs_super_bytes_used(info->super_copy);
if (alloc)
old_val += num_bytes;
else
old_val -= num_bytes;
- btrfs_set_super_bytes_used(&info->super_copy, old_val);
+ btrfs_set_super_bytes_used(info->super_copy, old_val);
/* block accounting for root item */
old_val = btrfs_root_used(&root->root_item);
old_val = btrfs_block_group_used(&cache->item);
num_bytes = min(total, cache->key.offset - byte_in_group);
+
if (alloc) {
old_val += num_bytes;
cache->space_info->bytes_used += num_bytes;
}
while (num > 0) {
cache = btrfs_lookup_block_group(fs_info, bytenr);
+ if (!cache) {
+ len = min((u64)root->sectorsize, num);
+ goto next;
+ }
WARN_ON(!cache);
len = min(num, cache->key.offset -
(bytenr - cache->key.objectid));
cache->space_info->bytes_pinned -= len;
fs_info->total_pinned -= len;
}
+next:
bytenr += len;
num -= len;
}
return 0;
}
-int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy)
-{
- u64 last = 0;
- u64 start;
- u64 end;
- struct extent_io_tree *pinned_extents = &root->fs_info->pinned_extents;
- int ret;
-
- while(1) {
- ret = find_first_extent_bit(pinned_extents, last,
- &start, &end, EXTENT_DIRTY);
- if (ret)
- break;
- set_extent_dirty(copy, start, end, GFP_NOFS);
- last = end + 1;
- }
- return 0;
-}
-
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct extent_io_tree *unpin)
return 0;
}
+static int extent_root_pending_ops(struct btrfs_fs_info *info)
+{
+ u64 start;
+ u64 end;
+ int ret;
+
+ ret = find_first_extent_bit(&info->extent_ins, 0, &start,
+ &end, EXTENT_LOCKED);
+ if (!ret) {
+ ret = find_first_extent_bit(&info->pending_del, 0, &start, &end,
+ EXTENT_LOCKED);
+ }
+ return ret == 0;
+
+}
static int finish_current_insert(struct btrfs_trans_handle *trans,
struct btrfs_root *extent_root)
{
u64 end;
u64 priv;
struct btrfs_fs_info *info = extent_root->fs_info;
- struct btrfs_path *path;
struct pending_extent_op *extent_op;
struct btrfs_key key;
int ret;
-
- path = btrfs_alloc_path();
+ int skinny_metadata =
+ btrfs_fs_incompat(extent_root->fs_info,
+ BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
while(1) {
ret = find_first_extent_bit(&info->extent_ins, 0, &start,
if (extent_op->type == PENDING_EXTENT_INSERT) {
key.objectid = start;
- key.offset = end + 1 - start;
- key.type = BTRFS_EXTENT_ITEM_KEY;
+ if (skinny_metadata) {
+ key.offset = extent_op->level;
+ key.type = BTRFS_METADATA_ITEM_KEY;
+ } else {
+ key.offset = extent_op->num_bytes;
+ key.type = BTRFS_EXTENT_ITEM_KEY;
+ }
ret = alloc_reserved_tree_block(trans, extent_root,
extent_root->root_key.objectid,
trans->transid,
extent_op->flags,
&extent_op->key,
- extent_op->level, &key);
+ extent_op->level, &key);
+ BUG_ON(ret);
} else {
BUG_ON(1);
}
GFP_NOFS);
kfree(extent_op);
}
- btrfs_free_path(path);
return 0;
}
return 0;
}
+void btrfs_pin_extent(struct btrfs_fs_info *fs_info,
+ u64 bytenr, u64 num_bytes)
+{
+ update_pinned_extents(fs_info->extent_root, bytenr, num_bytes, 1);
+}
+
+void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
+ u64 bytenr, u64 num_bytes)
+{
+ update_pinned_extents(fs_info->extent_root, bytenr, num_bytes, 0);
+}
+
/*
* remove an extent from the root, returns 0 on success
*/
struct btrfs_key key;
struct btrfs_path *path;
- struct btrfs_fs_info *info = root->fs_info;
- struct btrfs_root *extent_root = info->extent_root;
+ struct btrfs_extent_ops *ops = root->fs_info->extent_ops;
+ struct btrfs_root *extent_root = root->fs_info->extent_root;
struct extent_buffer *leaf;
struct btrfs_extent_item *ei;
struct btrfs_extent_inline_ref *iref;
int num_to_del = 1;
u32 item_size;
u64 refs;
+ int skinny_metadata =
+ btrfs_fs_incompat(extent_root->fs_info,
+ BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
+ if (root->fs_info->free_extent_hook) {
+ root->fs_info->free_extent_hook(trans, root, bytenr, num_bytes,
+ parent, root_objectid, owner_objectid,
+ owner_offset, refs_to_drop);
+
+ }
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = 1;
- path->leave_spinning = 1;
is_data = owner_objectid >= BTRFS_FIRST_FREE_OBJECTID;
+ if (is_data)
+ skinny_metadata = 0;
BUG_ON(!is_data && refs_to_drop != 1);
ret = lookup_extent_backref(trans, extent_root, path, &iref,
found_extent = 1;
break;
}
+ if (key.type == BTRFS_METADATA_ITEM_KEY &&
+ key.offset == owner_objectid) {
+ found_extent = 1;
+ break;
+ }
if (path->slots[0] - extent_slot > 5)
break;
extent_slot--;
NULL, refs_to_drop,
is_data);
BUG_ON(ret);
- btrfs_release_path(extent_root, path);
- path->leave_spinning = 1;
+ btrfs_release_path(path);
key.objectid = bytenr;
- key.type = BTRFS_EXTENT_ITEM_KEY;
- key.offset = num_bytes;
+
+ if (skinny_metadata) {
+ key.type = BTRFS_METADATA_ITEM_KEY;
+ key.offset = owner_objectid;
+ } else {
+ key.type = BTRFS_EXTENT_ITEM_KEY;
+ key.offset = num_bytes;
+ }
ret = btrfs_search_slot(trans, extent_root,
&key, path, -1, 1);
+ if (ret > 0 && skinny_metadata && path->slots[0]) {
+ path->slots[0]--;
+ btrfs_item_key_to_cpu(path->nodes[0],
+ &key,
+ path->slots[0]);
+ if (key.objectid == bytenr &&
+ key.type == BTRFS_EXTENT_ITEM_KEY &&
+ key.offset == num_bytes)
+ ret = 0;
+ }
+
+ if (ret > 0 && skinny_metadata) {
+ skinny_metadata = 0;
+ btrfs_release_path(path);
+ key.type = BTRFS_EXTENT_ITEM_KEY;
+ key.offset = num_bytes;
+ ret = btrfs_search_slot(trans, extent_root,
+ &key, path, -1, 1);
+ }
+
if (ret) {
printk(KERN_ERR "umm, got %d back from search"
", was looking for %llu\n", ret,
extent_slot = path->slots[0];
}
} else {
- btrfs_print_leaf(extent_root, path->nodes[0]);
- WARN_ON(1);
printk(KERN_ERR "btrfs unable to find ref byte nr %llu "
"parent %llu root %llu owner %llu offset %llu\n",
(unsigned long long)bytenr,
(unsigned long long)root_objectid,
(unsigned long long)owner_objectid,
(unsigned long long)owner_offset);
+ ret = -EIO;
+ goto fail;
}
leaf = path->nodes[0];
owner_objectid, 0);
BUG_ON(ret < 0);
- btrfs_release_path(extent_root, path);
- path->leave_spinning = 1;
+ btrfs_release_path(path);
key.objectid = bytenr;
key.type = BTRFS_EXTENT_ITEM_KEY;
BUG_ON(item_size < sizeof(*ei));
ei = btrfs_item_ptr(leaf, extent_slot,
struct btrfs_extent_item);
- if (owner_objectid < BTRFS_FIRST_FREE_OBJECTID) {
+ if (owner_objectid < BTRFS_FIRST_FREE_OBJECTID &&
+ key.type == BTRFS_EXTENT_ITEM_KEY) {
struct btrfs_tree_block_info *bi;
BUG_ON(item_size < sizeof(*ei) + sizeof(*bi));
bi = (struct btrfs_tree_block_info *)(ei + 1);
}
} else {
int mark_free = 0;
+ int pin = 1;
if (found_extent) {
BUG_ON(is_data && refs_to_drop !=
}
}
- ret = pin_down_bytes(trans, root, bytenr, num_bytes, is_data);
- if (ret > 0)
- mark_free = 1;
- BUG_ON(ret < 0);
+ if (ops && ops->free_extent) {
+ ret = ops->free_extent(root, bytenr, num_bytes);
+ if (ret > 0) {
+ pin = 0;
+ mark_free = 0;
+ }
+ }
+
+ if (pin) {
+ ret = pin_down_bytes(trans, root, bytenr, num_bytes,
+ is_data);
+ if (ret > 0)
+ mark_free = 1;
+ BUG_ON(ret < 0);
+ }
ret = btrfs_del_items(trans, extent_root, path, path->slots[0],
num_to_del);
BUG_ON(ret);
- btrfs_release_path(extent_root, path);
+ btrfs_release_path(path);
if (is_data) {
ret = btrfs_del_csums(trans, root, bytenr, num_bytes);
BUG_ON(ret);
}
- ret = update_block_group(trans, root, bytenr, num_bytes, 0,
- mark_free);
- BUG_ON(ret);
+ update_block_group(trans, root, bytenr, num_bytes, 0, mark_free);
}
+fail:
btrfs_free_path(path);
finish_current_insert(trans, extent_root);
return ret;
WARN_ON(num_bytes < root->sectorsize);
btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY);
+ search_start = stripe_align(root, search_start);
+
if (hint_byte) {
block_group = btrfs_lookup_first_block_group(info, hint_byte);
if (!block_group)
total_needed += empty_size;
check_failed:
+ search_start = stripe_align(root, search_start);
if (!block_group) {
block_group = btrfs_lookup_first_block_group(info,
search_start);
ret = find_search_start(root, &block_group, &search_start,
total_needed, data);
if (ret)
- goto error;
+ goto new_group;
- search_start = stripe_align(root, search_start);
ins->objectid = search_start;
ins->offset = num_bytes;
goto new_group;
}
+ if (info->excluded_extents &&
+ test_range_bit(info->excluded_extents, ins->objectid,
+ ins->objectid + num_bytes -1, EXTENT_DIRTY, 0)) {
+ search_start = ins->objectid + num_bytes;
+ goto new_group;
+ }
+
if (exclude_nr > 0 && (ins->objectid + num_bytes > exclude_start &&
ins->objectid < exclude_start + exclude_nr)) {
search_start = exclude_start + exclude_nr;
}
if (!(data & BTRFS_BLOCK_GROUP_DATA)) {
+ if (check_crossing_stripes(ins->objectid, num_bytes)) {
+ search_start = round_down(ins->objectid + num_bytes,
+ BTRFS_STRIPE_LEN);
+ goto new_group;
+ }
block_group = btrfs_lookup_block_group(info, ins->objectid);
if (block_group)
trans->block_group = block_group;
return ret;
}
-static int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- u64 num_bytes, u64 empty_size,
- u64 hint_byte, u64 search_end,
- struct btrfs_key *ins, int data)
+int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ u64 num_bytes, u64 empty_size,
+ u64 hint_byte, u64 search_end,
+ struct btrfs_key *ins, int data)
{
int ret;
u64 search_start = 0;
if (info->extent_ops) {
struct btrfs_extent_ops *ops = info->extent_ops;
- ret = ops->alloc_extent(root, num_bytes, hint_byte, ins);
+ ret = ops->alloc_extent(root, num_bytes, hint_byte, ins, !data);
BUG_ON(ret);
goto found;
}
struct btrfs_extent_inline_ref *iref;
struct btrfs_path *path;
struct extent_buffer *leaf;
- u32 size = sizeof(*extent_item) + sizeof(*block_info) + sizeof(*iref);
+ u32 size = sizeof(*extent_item) + sizeof(*iref);
+ int skinny_metadata =
+ btrfs_fs_incompat(fs_info,
+ BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
+
+ if (!skinny_metadata)
+ size += sizeof(*block_info);
path = btrfs_alloc_path();
BUG_ON(!path);
- path->leave_spinning = 1;
ret = btrfs_insert_empty_item(trans, fs_info->extent_root, path,
ins, size);
BUG_ON(ret);
btrfs_set_extent_generation(leaf, extent_item, generation);
btrfs_set_extent_flags(leaf, extent_item,
flags | BTRFS_EXTENT_FLAG_TREE_BLOCK);
- block_info = (struct btrfs_tree_block_info *)(extent_item + 1);
- btrfs_set_tree_block_key(leaf, block_info, key);
- btrfs_set_tree_block_level(leaf, block_info, level);
+ if (skinny_metadata) {
+ iref = (struct btrfs_extent_inline_ref *)(extent_item + 1);
+ } else {
+ block_info = (struct btrfs_tree_block_info *)(extent_item + 1);
+ btrfs_set_tree_block_key(leaf, block_info, key);
+ btrfs_set_tree_block_level(leaf, block_info, level);
+ iref = (struct btrfs_extent_inline_ref *)(block_info + 1);
+ }
- iref = (struct btrfs_extent_inline_ref *)(block_info + 1);
btrfs_set_extent_inline_ref_type(leaf, iref, BTRFS_TREE_BLOCK_REF_KEY);
btrfs_set_extent_inline_ref_offset(leaf, iref, root_objectid);
btrfs_mark_buffer_dirty(leaf);
btrfs_free_path(path);
- ret = update_block_group(trans, root, ins->objectid, ins->offset,
+ ret = update_block_group(trans, root, ins->objectid, root->leafsize,
1, 0);
- if (ret) {
- printk(KERN_ERR "btrfs update block group failed for %llu "
- "%llu\n", (unsigned long long)ins->objectid,
- (unsigned long long)ins->offset);
- BUG();
- }
return ret;
}
set_state_private(&root->fs_info->extent_ins,
ins->objectid, (unsigned long)extent_op);
} else {
+ if (btrfs_fs_incompat(root->fs_info,
+ BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)) {
+ ins->offset = level;
+ ins->type = BTRFS_METADATA_ITEM_KEY;
+ }
ret = alloc_reserved_tree_block(trans, root, root_objectid,
generation, flags,
key, level, ins);
next = read_tree_block(root, bytenr, blocksize,
ptr_gen);
mutex_lock(&root->fs_info->fs_mutex);
+ if (!extent_buffer_uptodate(next)) {
+ if (IS_ERR(next))
+ ret = PTR_ERR(next);
+ else
+ ret = -EIO;
+ break;
+ }
}
WARN_ON(*level <= 0);
if (path->nodes[*level-1])
return 1;
}
-/*
- * drop the reference count on the tree rooted at 'snap'. This traverses
- * the tree freeing any blocks that have a ref count of zero after being
- * decremented.
- */
-int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
- *root)
-{
- int ret = 0;
- int wret;
- int level;
- struct btrfs_path *path;
- int i;
- int orig_level;
- struct btrfs_root_item *root_item = &root->root_item;
-
- path = btrfs_alloc_path();
- BUG_ON(!path);
-
- level = btrfs_header_level(root->node);
- orig_level = level;
- if (btrfs_disk_key_objectid(&root_item->drop_progress) == 0) {
- path->nodes[level] = root->node;
- extent_buffer_get(root->node);
- path->slots[level] = 0;
- } else {
- struct btrfs_key key;
- struct btrfs_disk_key found_key;
- struct extent_buffer *node;
-
- btrfs_disk_key_to_cpu(&key, &root_item->drop_progress);
- level = root_item->drop_level;
- path->lowest_level = level;
- wret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
- if (wret < 0) {
- ret = wret;
- goto out;
- }
- node = path->nodes[level];
- btrfs_node_key(node, &found_key, path->slots[level]);
- WARN_ON(memcmp(&found_key, &root_item->drop_progress,
- sizeof(found_key)));
- }
- while(1) {
- wret = walk_down_tree(trans, root, path, &level);
- if (wret < 0)
- ret = wret;
- if (wret != 0)
- break;
-
- wret = walk_up_tree(trans, root, path, &level);
- if (wret < 0)
- ret = wret;
- if (wret != 0)
- break;
- /*
- ret = -EAGAIN;
- break;
- */
- }
- for (i = 0; i <= orig_level; i++) {
- if (path->nodes[i]) {
- free_extent_buffer(path->nodes[i]);
- path->nodes[i] = NULL;
- }
- }
-out:
- btrfs_free_path(path);
- return ret;
-}
-
-#endif
+#endif
int btrfs_free_block_groups(struct btrfs_fs_info *info)
{
+ struct btrfs_space_info *sinfo;
+ struct btrfs_block_group_cache *cache;
u64 start;
u64 end;
u64 ptr;
int ret;
+
while(1) {
ret = find_first_extent_bit(&info->block_group_cache, 0,
&start, &end, (unsigned int)-1);
if (ret)
break;
ret = get_state_private(&info->block_group_cache, start, &ptr);
- if (!ret)
- kfree((void *)(unsigned long)ptr);
+ if (!ret) {
+ cache = u64_to_ptr(ptr);
+ if (cache->free_space_ctl) {
+ btrfs_remove_free_space_cache(cache);
+ kfree(cache->free_space_ctl);
+ }
+ kfree(cache);
+ }
clear_extent_bits(&info->block_group_cache, start,
end, (unsigned int)-1, GFP_NOFS);
}
clear_extent_dirty(&info->free_space_cache, start,
end, GFP_NOFS);
}
+
+ while (!list_empty(&info->space_info)) {
+ sinfo = list_entry(info->space_info.next,
+ struct btrfs_space_info, list);
+ list_del_init(&sinfo->list);
+ kfree(sinfo);
+ }
return 0;
}
-int find_first_block_group(struct btrfs_root *root, struct btrfs_path *path,
- struct btrfs_key *key)
+static int find_first_block_group(struct btrfs_root *root,
+ struct btrfs_path *path, struct btrfs_key *key)
{
int ret;
struct btrfs_key found_key;
return ret;
}
+static void account_super_bytes(struct btrfs_fs_info *fs_info,
+ struct btrfs_block_group_cache *cache)
+{
+ u64 bytenr;
+ u64 *logical;
+ int stripe_len;
+ int i, nr, ret;
+
+ if (cache->key.objectid < BTRFS_SUPER_INFO_OFFSET) {
+ stripe_len = BTRFS_SUPER_INFO_OFFSET - cache->key.objectid;
+ cache->bytes_super += stripe_len;
+ }
+
+ for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
+ bytenr = btrfs_sb_offset(i);
+ ret = btrfs_rmap_block(&fs_info->mapping_tree,
+ cache->key.objectid, bytenr,
+ 0, &logical, &nr, &stripe_len);
+ if (ret)
+ return;
+
+ while (nr--) {
+ u64 start, len;
+
+ if (logical[nr] > cache->key.objectid +
+ cache->key.offset)
+ continue;
+
+ if (logical[nr] + stripe_len <= cache->key.objectid)
+ continue;
+
+ start = logical[nr];
+ if (start < cache->key.objectid) {
+ start = cache->key.objectid;
+ len = (logical[nr] + stripe_len) - start;
+ } else {
+ len = min_t(u64, stripe_len,
+ cache->key.objectid +
+ cache->key.offset - start);
+ }
+
+ cache->bytes_super += len;
+ }
+
+ kfree(logical);
+ }
+}
+
int btrfs_read_block_groups(struct btrfs_root *root)
{
struct btrfs_path *path;
cache = kzalloc(sizeof(*cache), GFP_NOFS);
if (!cache) {
ret = -ENOMEM;
- break;
+ goto error;
}
read_extent_buffer(leaf, &cache->item,
cache->cached = 0;
cache->pinned = 0;
key.objectid = found_key.objectid + found_key.offset;
- btrfs_release_path(root, path);
+ btrfs_release_path(path);
cache->flags = btrfs_block_group_flags(&cache->item);
bit = 0;
if (cache->flags & BTRFS_BLOCK_GROUP_DATA) {
if (btrfs_chunk_readonly(root, cache->key.objectid))
cache->ro = 1;
+ account_super_bytes(info, cache);
+
ret = update_space_info(info, cache->flags, found_key.offset,
btrfs_block_group_used(&cache->item),
&space_info);
return ret;
}
-int btrfs_make_block_group(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, u64 bytes_used,
- u64 type, u64 chunk_objectid, u64 chunk_offset,
- u64 size)
+struct btrfs_block_group_cache *
+btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
+ u64 chunk_objectid, u64 chunk_offset, u64 size)
{
int ret;
int bit = 0;
- struct btrfs_root *extent_root;
struct btrfs_block_group_cache *cache;
struct extent_io_tree *block_group_cache;
- extent_root = root->fs_info->extent_root;
- block_group_cache = &root->fs_info->block_group_cache;
+ block_group_cache = &fs_info->block_group_cache;
cache = kzalloc(sizeof(*cache), GFP_NOFS);
BUG_ON(!cache);
cache->flags = type;
btrfs_set_block_group_flags(&cache->item, type);
- ret = update_space_info(root->fs_info, cache->flags, size, bytes_used,
+ account_super_bytes(fs_info, cache);
+ ret = update_space_info(fs_info, cache->flags, size, bytes_used,
&cache->space_info);
BUG_ON(ret);
bit = block_group_state_bits(type);
- set_extent_bits(block_group_cache, chunk_offset,
- chunk_offset + size - 1,
- bit | EXTENT_LOCKED, GFP_NOFS);
+ ret = set_extent_bits(block_group_cache, chunk_offset,
+ chunk_offset + size - 1,
+ bit | EXTENT_LOCKED, GFP_NOFS);
+ BUG_ON(ret);
- set_state_private(block_group_cache, chunk_offset,
- (unsigned long)cache);
+ ret = set_state_private(block_group_cache, chunk_offset,
+ (unsigned long)cache);
+ BUG_ON(ret);
+ set_avail_alloc_bits(fs_info, type);
+
+ return cache;
+}
+
+int btrfs_make_block_group(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, u64 bytes_used,
+ u64 type, u64 chunk_objectid, u64 chunk_offset,
+ u64 size)
+{
+ int ret;
+ struct btrfs_root *extent_root;
+ struct btrfs_block_group_cache *cache;
+
+ cache = btrfs_add_block_group(root->fs_info, bytes_used, type,
+ chunk_objectid, chunk_offset, size);
+ extent_root = root->fs_info->extent_root;
ret = btrfs_insert_item(trans, extent_root, &cache->key, &cache->item,
sizeof(cache->item));
BUG_ON(ret);
- finish_current_insert(trans, extent_root);
+ ret = finish_current_insert(trans, extent_root);
+ BUG_ON(ret);
ret = del_pending_extents(trans, extent_root);
BUG_ON(ret);
- set_avail_alloc_bits(extent_root->fs_info, type);
+
return 0;
}
extent_root = root->fs_info->extent_root;
block_group_cache = &root->fs_info->block_group_cache;
chunk_objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
- total_bytes = btrfs_super_total_bytes(&root->fs_info->super_copy);
+ total_bytes = btrfs_super_total_bytes(root->fs_info->super_copy);
group_align = 64 * root->sectorsize;
cur_start = 0;
return update_block_group(trans, root, bytenr, num_bytes,
alloc, mark_free);
}
+
+/*
+ * Just remove a block group item in extent tree
+ * Caller should ensure the block group is empty and all space is pinned.
+ * Or new tree block/data may be allocated into it.
+ */
+static int free_block_group_item(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ u64 bytenr, u64 len)
+{
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ struct btrfs_root *root = fs_info->extent_root;
+ int ret = 0;
+
+ key.objectid = bytenr;
+ key.offset = len;
+ key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
+ if (ret > 0) {
+ ret = -ENOENT;
+ goto out;
+ }
+ if (ret < 0)
+ goto out;
+
+ ret = btrfs_del_item(trans, root, path);
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
+static int free_dev_extent_item(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ u64 devid, u64 dev_offset)
+{
+ struct btrfs_root *root = fs_info->dev_root;
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ int ret;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ key.objectid = devid;
+ key.type = BTRFS_DEV_EXTENT_KEY;
+ key.offset = dev_offset;
+
+ ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
+ if (ret < 0)
+ goto out;
+ if (ret > 0) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ ret = btrfs_del_item(trans, root, path);
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
+static int free_chunk_dev_extent_items(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ u64 chunk_offset)
+{
+ struct btrfs_chunk *chunk = NULL;
+ struct btrfs_root *root= fs_info->chunk_root;
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ u16 num_stripes;
+ int i;
+ int ret;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
+ key.type = BTRFS_CHUNK_ITEM_KEY;
+ key.offset = chunk_offset;
+
+ ret = btrfs_search_slot(trans, root, &key, path, 0, 0);
+ if (ret < 0)
+ goto out;
+ if (ret > 0) {
+ ret = -ENOENT;
+ goto out;
+ }
+ chunk = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_chunk);
+ num_stripes = btrfs_chunk_num_stripes(path->nodes[0], chunk);
+ for (i = 0; i < num_stripes; i++) {
+ ret = free_dev_extent_item(trans, fs_info,
+ btrfs_stripe_devid_nr(path->nodes[0], chunk, i),
+ btrfs_stripe_offset_nr(path->nodes[0], chunk, i));
+ if (ret < 0)
+ goto out;
+ }
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
+static int free_system_chunk_item(struct btrfs_super_block *super,
+ struct btrfs_key *key)
+{
+ struct btrfs_disk_key *disk_key;
+ struct btrfs_key cpu_key;
+ u32 array_size = btrfs_super_sys_array_size(super);
+ char *ptr = (char *)super->sys_chunk_array;
+ int cur = 0;
+ int ret = -ENOENT;
+
+ while (cur < btrfs_super_sys_array_size(super)) {
+ struct btrfs_chunk *chunk;
+ u32 num_stripes;
+ u32 chunk_len;
+
+ disk_key = (struct btrfs_disk_key *)(ptr + cur);
+ btrfs_disk_key_to_cpu(&cpu_key, disk_key);
+ if (cpu_key.type != BTRFS_CHUNK_ITEM_KEY) {
+ /* just in case */
+ ret = -EIO;
+ goto out;
+ }
+
+ chunk = (struct btrfs_chunk *)(ptr + cur + sizeof(*disk_key));
+ num_stripes = btrfs_stack_chunk_num_stripes(chunk);
+ chunk_len = btrfs_chunk_item_size(num_stripes) +
+ sizeof(*disk_key);
+
+ if (key->objectid == cpu_key.objectid &&
+ key->offset == cpu_key.offset &&
+ key->type == cpu_key.type) {
+ memmove(ptr + cur, ptr + cur + chunk_len,
+ array_size - cur - chunk_len);
+ array_size -= chunk_len;
+ btrfs_set_super_sys_array_size(super, array_size);
+ ret = 0;
+ goto out;
+ }
+
+ cur += chunk_len;
+ }
+out:
+ return ret;
+}
+
+static int free_chunk_item(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ u64 bytenr, u64 len)
+{
+ struct btrfs_path *path;
+ struct btrfs_key key;
+ struct btrfs_root *root = fs_info->chunk_root;
+ struct btrfs_chunk *chunk;
+ u64 chunk_type;
+ int ret;
+
+ key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
+ key.offset = bytenr;
+ key.type = BTRFS_CHUNK_ITEM_KEY;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
+ if (ret > 0) {
+ ret = -ENOENT;
+ goto out;
+ }
+ if (ret < 0)
+ goto out;
+ chunk = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_chunk);
+ chunk_type = btrfs_chunk_type(path->nodes[0], chunk);
+
+ ret = btrfs_del_item(trans, root, path);
+ if (ret < 0)
+ goto out;
+
+ if (chunk_type & BTRFS_BLOCK_GROUP_SYSTEM)
+ ret = free_system_chunk_item(fs_info->super_copy, &key);
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
+static u64 get_dev_extent_len(struct map_lookup *map)
+{
+ int div;
+
+ switch (map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
+ case 0: /* Single */
+ case BTRFS_BLOCK_GROUP_DUP:
+ case BTRFS_BLOCK_GROUP_RAID1:
+ div = 1;
+ break;
+ case BTRFS_BLOCK_GROUP_RAID5:
+ div = (map->num_stripes - 1);
+ break;
+ case BTRFS_BLOCK_GROUP_RAID6:
+ div = (map->num_stripes - 2);
+ break;
+ case BTRFS_BLOCK_GROUP_RAID10:
+ div = (map->num_stripes / map->sub_stripes);
+ break;
+ default:
+ /* normally, read chunk security hook should handled it */
+ BUG_ON(1);
+ }
+ return map->ce.size / div;
+}
+
+/* free block group/chunk related caches */
+static int free_block_group_cache(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ u64 bytenr, u64 len)
+{
+ struct btrfs_block_group_cache *cache;
+ struct cache_extent *ce;
+ struct map_lookup *map;
+ int ret;
+ int i;
+ u64 flags;
+
+ /* Free block group cache first */
+ cache = btrfs_lookup_block_group(fs_info, bytenr);
+ if (!cache)
+ return -ENOENT;
+ flags = cache->flags;
+ if (cache->free_space_ctl) {
+ btrfs_remove_free_space_cache(cache);
+ kfree(cache->free_space_ctl);
+ }
+ clear_extent_bits(&fs_info->block_group_cache, bytenr, bytenr + len,
+ (unsigned int)-1, GFP_NOFS);
+ ret = free_space_info(fs_info, flags, len, 0, NULL);
+ if (ret < 0)
+ goto out;
+ kfree(cache);
+
+ /* Then free mapping info and dev usage info */
+ ce = search_cache_extent(&fs_info->mapping_tree.cache_tree, bytenr);
+ if (!ce || ce->start != bytenr) {
+ ret = -ENOENT;
+ goto out;
+ }
+ map = container_of(ce, struct map_lookup, ce);
+ for (i = 0; i < map->num_stripes; i++) {
+ struct btrfs_device *device;
+
+ device = map->stripes[i].dev;
+ device->bytes_used -= get_dev_extent_len(map);
+ ret = btrfs_update_device(trans, device);
+ if (ret < 0)
+ goto out;
+ }
+ remove_cache_extent(&fs_info->mapping_tree.cache_tree, ce);
+ free(map);
+out:
+ return ret;
+}
+
+int btrfs_free_block_group(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info, u64 bytenr, u64 len)
+{
+ struct btrfs_root *extent_root = fs_info->extent_root;
+ struct btrfs_path *path;
+ struct btrfs_block_group_item *bgi;
+ struct btrfs_key key;
+ int ret = 0;
+
+ path = btrfs_alloc_path();
+ if (!path)
+ return -ENOMEM;
+
+ key.objectid = bytenr;
+ key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
+ key.offset = len;
+
+ /* Double check the block group to ensure it's empty */
+ ret = btrfs_search_slot(trans, extent_root, &key, path, 0, 0);
+ if (ret > 0) {
+ ret = -ENONET;
+ goto out;
+ }
+ if (ret < 0)
+ goto out;
+
+ bgi = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ struct btrfs_block_group_item);
+ if (btrfs_disk_block_group_used(path->nodes[0], bgi)) {
+ fprintf(stderr,
+ "WARNING: block group [%llu,%llu) is not empty\n",
+ bytenr, bytenr + len);
+ ret = -EINVAL;
+ goto out;
+ }
+ btrfs_release_path(path);
+
+ /*
+ * Now pin all space in the block group, to prevent further transaction
+ * allocate space from it.
+ * Every operation needs a transaction must be in the range.
+ */
+ btrfs_pin_extent(fs_info, bytenr, len);
+
+ /* delete block group item and chunk item */
+ ret = free_block_group_item(trans, fs_info, bytenr, len);
+ if (ret < 0) {
+ fprintf(stderr,
+ "failed to free block group item for [%llu,%llu)\n",
+ bytenr, bytenr + len);
+ btrfs_unpin_extent(fs_info, bytenr, len);
+ goto out;
+ }
+
+ ret = free_chunk_dev_extent_items(trans, fs_info, bytenr);
+ if (ret < 0) {
+ fprintf(stderr,
+ "failed to dev extents belongs to [%llu,%llu)\n",
+ bytenr, bytenr + len);
+ btrfs_unpin_extent(fs_info, bytenr, len);
+ goto out;
+ }
+ ret = free_chunk_item(trans, fs_info, bytenr, len);
+ if (ret < 0) {
+ fprintf(stderr,
+ "failed to free chunk for [%llu,%llu)\n",
+ bytenr, bytenr + len);
+ btrfs_unpin_extent(fs_info, bytenr, len);
+ goto out;
+ }
+
+ /* Now release the block_group_cache */
+ ret = free_block_group_cache(trans, fs_info, bytenr, len);
+ btrfs_unpin_extent(fs_info, bytenr, len);
+
+out:
+ btrfs_free_path(path);
+ return ret;
+}
+
+/*
+ * Fixup block accounting. The initial block accounting created by
+ * make_block_groups isn't accuracy in this case.
+ */
+int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ int ret;
+ int slot;
+ u64 start = 0;
+ u64 bytes_used = 0;
+ struct btrfs_path path;
+ struct btrfs_key key;
+ struct extent_buffer *leaf;
+ struct btrfs_block_group_cache *cache;
+ struct btrfs_fs_info *fs_info = root->fs_info;
+
+ root = root->fs_info->extent_root;
+
+ while(extent_root_pending_ops(fs_info)) {
+ ret = finish_current_insert(trans, root);
+ if (ret)
+ return ret;
+ ret = del_pending_extents(trans, root);
+ if (ret)
+ return ret;
+ }
+
+ while(1) {
+ cache = btrfs_lookup_first_block_group(fs_info, start);
+ if (!cache)
+ break;
+ start = cache->key.objectid + cache->key.offset;
+ btrfs_set_block_group_used(&cache->item, 0);
+ cache->space_info->bytes_used = 0;
+ set_extent_bits(&root->fs_info->block_group_cache,
+ cache->key.objectid,
+ cache->key.objectid + cache->key.offset -1,
+ BLOCK_GROUP_DIRTY, GFP_NOFS);
+ }
+
+ btrfs_init_path(&path);
+ key.offset = 0;
+ key.objectid = 0;
+ btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
+ ret = btrfs_search_slot(trans, root->fs_info->extent_root,
+ &key, &path, 0, 0);
+ if (ret < 0)
+ return ret;
+ while(1) {
+ leaf = path.nodes[0];
+ slot = path.slots[0];
+ if (slot >= btrfs_header_nritems(leaf)) {
+ ret = btrfs_next_leaf(root, &path);
+ if (ret < 0)
+ return ret;
+ if (ret > 0)
+ break;
+ leaf = path.nodes[0];
+ slot = path.slots[0];
+ }
+ btrfs_item_key_to_cpu(leaf, &key, slot);
+ if (key.type == BTRFS_EXTENT_ITEM_KEY) {
+ bytes_used += key.offset;
+ ret = btrfs_update_block_group(trans, root,
+ key.objectid, key.offset, 1, 0);
+ BUG_ON(ret);
+ } else if (key.type == BTRFS_METADATA_ITEM_KEY) {
+ bytes_used += root->leafsize;
+ ret = btrfs_update_block_group(trans, root,
+ key.objectid, root->leafsize, 1, 0);
+ BUG_ON(ret);
+ }
+ path.slots[0]++;
+ }
+ btrfs_set_super_bytes_used(root->fs_info->super_copy, bytes_used);
+ btrfs_release_path(&path);
+ return 0;
+}
+
+/*
+ * Record a file extent. Do all the required works, such as inserting
+ * file extent item, inserting extent item and backref item into extent
+ * tree and updating block accounting.
+ */
+int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, u64 objectid,
+ struct btrfs_inode_item *inode,
+ u64 file_pos, u64 disk_bytenr,
+ u64 num_bytes)
+{
+ int ret;
+ struct btrfs_fs_info *info = root->fs_info;
+ struct btrfs_root *extent_root = info->extent_root;
+ struct extent_buffer *leaf;
+ struct btrfs_file_extent_item *fi;
+ struct btrfs_key ins_key;
+ struct btrfs_path path;
+ struct btrfs_extent_item *ei;
+ u64 nbytes;
+
+ if (disk_bytenr == 0) {
+ ret = btrfs_insert_file_extent(trans, root, objectid,
+ file_pos, disk_bytenr,
+ num_bytes, num_bytes);
+ return ret;
+ }
+
+ btrfs_init_path(&path);
+
+ ins_key.objectid = objectid;
+ ins_key.offset = file_pos;
+ btrfs_set_key_type(&ins_key, BTRFS_EXTENT_DATA_KEY);
+ ret = btrfs_insert_empty_item(trans, root, &path, &ins_key,
+ sizeof(*fi));
+ if (ret)
+ goto fail;
+ leaf = path.nodes[0];
+ fi = btrfs_item_ptr(leaf, path.slots[0],
+ struct btrfs_file_extent_item);
+ btrfs_set_file_extent_generation(leaf, fi, trans->transid);
+ btrfs_set_file_extent_type(leaf, fi, BTRFS_FILE_EXTENT_REG);
+ btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
+ btrfs_set_file_extent_disk_num_bytes(leaf, fi, num_bytes);
+ btrfs_set_file_extent_offset(leaf, fi, 0);
+ btrfs_set_file_extent_num_bytes(leaf, fi, num_bytes);
+ btrfs_set_file_extent_ram_bytes(leaf, fi, num_bytes);
+ btrfs_set_file_extent_compression(leaf, fi, 0);
+ btrfs_set_file_extent_encryption(leaf, fi, 0);
+ btrfs_set_file_extent_other_encoding(leaf, fi, 0);
+ btrfs_mark_buffer_dirty(leaf);
+
+ nbytes = btrfs_stack_inode_nbytes(inode) + num_bytes;
+ btrfs_set_stack_inode_nbytes(inode, nbytes);
+
+ btrfs_release_path(&path);
+
+ ins_key.objectid = disk_bytenr;
+ ins_key.offset = num_bytes;
+ ins_key.type = BTRFS_EXTENT_ITEM_KEY;
+
+ ret = btrfs_insert_empty_item(trans, extent_root, &path,
+ &ins_key, sizeof(*ei));
+ if (ret == 0) {
+ leaf = path.nodes[0];
+ ei = btrfs_item_ptr(leaf, path.slots[0],
+ struct btrfs_extent_item);
+
+ btrfs_set_extent_refs(leaf, ei, 0);
+ btrfs_set_extent_generation(leaf, ei, 0);
+ btrfs_set_extent_flags(leaf, ei, BTRFS_EXTENT_FLAG_DATA);
+
+ btrfs_mark_buffer_dirty(leaf);
+
+ ret = btrfs_update_block_group(trans, root, disk_bytenr,
+ num_bytes, 1, 0);
+ if (ret)
+ goto fail;
+ } else if (ret != -EEXIST) {
+ goto fail;
+ }
+ btrfs_extent_post_op(trans, extent_root);
+
+ ret = btrfs_inc_extent_ref(trans, root, disk_bytenr, num_bytes, 0,
+ root->root_key.objectid,
+ objectid, file_pos);
+ if (ret)
+ goto fail;
+ ret = 0;
+fail:
+ btrfs_release_path(&path);
+ return ret;
+}